Voltage inspection device and voltage inspection method for fuel cell stack and vehicle

Abstract

The invention discloses a voltage inspection device and method for a fuel cell stack and a vehicle. Wherein the fuel cell stack comprises a plurality of single cells which are sequentially connected in series and stacked, the voltage inspection device comprises a plurality of first plug connectors, a plurality of second plug connectors and a voltage inspection module, the plurality of first plug connectors are connected with the plurality of single cells in a one-to-one correspondence manner, and each first plug connector is arranged at an anode inlet of the corresponding single cell; and the plurality of second plug connectors are connected with the plurality of single batteries in a one-to-one correspondence manner, each second plug connector is arranged at the anode outlet of the corresponding single battery, and the voltage inspection module is electrically connected with the plurality of first plug connectors and the plurality of second plug connectors so as to respectively obtain the first voltage and the second voltage of each single battery. Therefore, the voltage inspection module can acquire the first voltage and the second voltage at the same time, the synchronism of voltage signal acquisition of each single cell is ensured, and convenience is provided for subsequent fault diagnosis of a fuel cell stack.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell detection, and in particular to a voltage inspection device for a fuel cell stack, a voltage inspection method for a fuel cell stack, and a vehicle. Background Art

[0002] With the rapid development of fuel cell technology, the safety performance of fuel cells has received more and more attention. In order to ensure the safe operation of the fuel cell system, it is necessary to monitor the voltage of each single cell of the fuel cell stack in real time.

[0003] In the related art, a voltage patrol module is usually used to collect voltage signals of a single or multiple single-cell batteries of a fuel cell stack, so as to upload the voltage signals to a control module such as a host computer for fault detection. Specifically, two voltage patrol modules are used to collect voltage signals at the anode inlet and anode outlet of the single-cell battery respectively, and the voltage signals are uploaded to the host computer. However, it is difficult for the two voltage patrol modules to ensure the synchronization of voltage collection, which is not convenient for subsequent fuel cell stack fault diagnosis. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the present invention is to provide a voltage inspection device for a fuel cell stack, wherein a voltage inspection module of the voltage inspection device can simultaneously obtain a first voltage at the anode inlet and a second voltage at the anode outlet of each single cell through a first connector and a second connector, thereby ensuring the synchronization of voltage signal acquisition of each single cell, providing convenience for subsequent fault diagnosis of the fuel cell stack, and being conducive to improving the fault diagnosis efficiency of the fuel cell stack.

[0005] A second object of the present invention is to provide a vehicle.

[0006] The third objective of the present invention is to provide a voltage inspection method for a fuel cell stack.

[0007] A fourth object of the present invention is to provide a computer-readable storage medium.

[0008] To achieve the above-mentioned object, a first embodiment of the present invention provides a voltage inspection device for a fuel cell stack, wherein the fuel cell stack comprises a plurality of monolithic cells stacked in series in sequence, and the voltage inspection device comprises:

[0009] A plurality of first connectors, the plurality of first connectors are connected to the plurality of single-chip batteries in a one-to-one correspondence, and each first connector is arranged at the anode entrance of the corresponding single-chip battery;

[0010] A plurality of second connectors, the plurality of second connectors are connected to the plurality of single-chip batteries in a one-to-one correspondence, and each second connector is arranged at the anode outlet of the corresponding single-chip battery;

[0011] A voltage inspection module is electrically connected to the plurality of first connectors and the plurality of second connectors to respectively obtain the first voltage and the second voltage of each single-chip battery.

[0012] According to the voltage patrol device of the fuel cell stack according to the embodiment of the present invention, the voltage patrol module of the voltage patrol device can simultaneously obtain the first voltage at the anode inlet and the second voltage at the anode outlet of each single-chip battery through the first connector and the second connector, thereby ensuring the synchronization of the voltage signal collection of each single-chip battery, providing convenience for the subsequent fault diagnosis of the fuel cell stack, and helping to improve the fault diagnosis efficiency of the fuel cell stack.

[0013] According to one embodiment of the present invention, the voltage inspection module is also used to obtain the anode inlet voltage of the current monolithic battery based on the first voltage of the current monolithic battery and the first voltage of the previous monolithic battery, and to obtain the anode outlet voltage of the current monolithic battery based on the second voltage of the current monolithic battery and the second voltage of the previous monolithic battery.

[0014] According to one embodiment of the present invention, the voltage inspection module includes:

[0015] A first wiring group, the first wiring group includes a plurality of first wiring terminals, the plurality of first wiring terminals correspond to the plurality of first plug-in connectors one by one, and each first wiring terminal is electrically connected to a corresponding first plug-in connector;

[0016] The second wiring group includes a plurality of second wiring terminals, the plurality of second wiring terminals correspond one-to-one to the plurality of second plug-in connectors, and each second wiring terminal is electrically connected to a corresponding second plug-in connector.

[0017] According to one embodiment of the present invention, the first wiring group and the second wiring group are spaced apart along a first direction of the voltage patrol module, and a plurality of first wiring terminals of the first wiring group are spaced apart in sequence along a second direction of the voltage patrol module, and a plurality of second wiring terminals of the second wiring group are spaced apart in sequence along the second direction of the voltage patrol module.

[0018] According to an embodiment of the present invention, the voltage inspection module further includes: a grounding terminal, which is suitable for being grounded so that the voltage inspection module can obtain the first voltage and the second voltage of each single-chip battery.

[0019] According to one embodiment of the present invention, it also includes: a host computer, which is in communication with the voltage inspection module to send a fault detection instruction to the voltage inspection module, so that the voltage inspection module obtains the first voltage and the second voltage of each single-chip battery according to the fault detection instruction.

[0020] To achieve the above-mentioned object, a second embodiment of the present invention provides a vehicle, comprising the voltage inspection device for the fuel cell stack in the first embodiment.

[0021] According to the vehicle of the embodiment of the present invention, by providing the above-mentioned voltage patrol device of the fuel cell stack, the voltage patrol module of the voltage patrol device can simultaneously obtain the first voltage at the anode inlet and the second voltage at the anode outlet of each single-chip battery through the first connector and the second connector, thereby ensuring the synchronization of the voltage signal collection of each single-chip battery, providing convenience for the subsequent fault diagnosis of the fuel cell stack, and helping to improve the fault diagnosis efficiency of the fuel cell stack.

[0022] To achieve the above-mentioned object, a third embodiment of the present invention provides a voltage inspection method for a fuel cell stack, wherein the fuel cell stack includes a plurality of monolithic cells stacked in series, and the voltage inspection method is applied to the voltage inspection device in the first embodiment, and the method includes:

[0023] Obtaining the anode inlet voltage of the current single-cell battery, the anode outlet voltage of the current single-cell battery, the anode outlet voltage of the previous single-cell battery of the current single-cell battery, and the anode outlet voltage of the next single-cell battery of the current single-cell battery;

[0024] The fuel cell stack is fault-checked based on the anode inlet voltage of the current single cell, the anode outlet voltage of the current single cell, the anode outlet voltage of the previous single cell, and the anode outlet voltage of the next single cell to obtain a voltage inspection result.

[0025] According to the voltage inspection method of the fuel cell stack of the embodiment of the present invention, the anode inlet voltage of the current single-chip cell, the anode outlet voltage of the current single-chip cell, the anode outlet voltage of the previous single-chip cell, and the anode outlet voltage of the next single-chip cell are obtained, and the fuel cell stack is fault-detected according to the anode inlet voltage of the current single-chip cell, the anode outlet voltage of the current single-chip cell, the anode outlet voltage of the previous single-chip cell, and the anode outlet voltage of the next single-chip cell, so as to obtain the voltage inspection result. Therefore, when detecting whether the current single-chip cell has a fault, the fault detection can be realized according to the anode inlet voltage of the current single-chip cell, the anode outlet voltage of the current single-chip cell, the anode outlet voltage of the previous single-chip cell, and the anode outlet voltage of the next single-chip cell, and the detection parameters are relatively small, and the amount of calculation is relatively small, which is conducive to improving the accuracy of the detection.

[0026] According to one embodiment of the present invention, a fuel cell stack is fault-detected based on the anode inlet voltage of a current single cell, the anode outlet voltage of a current single cell, the anode outlet voltage of a previous single cell, and the anode outlet voltage of a next single cell to obtain a voltage inspection result, including:

[0027] If the anode inlet voltage of the current single-cell battery is greater than the first voltage value and less than k times the average value of the sum of the anode inlet voltages of multiple battery cells, and the anode outlet voltage of the current single-cell battery is less than the second voltage value, and the anode outlet voltage of the previous single-cell battery is greater than k times the average value of the sum of the anode outlet voltages of multiple battery cells, and the anode outlet voltage of the next single-cell battery is greater than k times the average value of the sum of the anode outlet voltages of multiple battery cells, then it is determined that the fuel cell stack has a fault, where k satisfies the relationship: 1.06≤k≤1.07.

[0028] To achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a computer-readable storage medium on which a voltage patrol program for a fuel cell stack is stored. When the voltage patrol program for the fuel cell stack is executed by a processor, the voltage patrol method for the fuel cell stack in the third aspect of the present invention is implemented.

[0029] According to the computer-readable storage medium of an embodiment of the present invention, through the voltage inspection method of the fuel cell stack, when detecting whether the current single-chip battery has a fault, fault detection can be achieved based on the anode inlet voltage of the current single-chip battery, the anode outlet voltage of the current single-chip battery, the anode outlet voltage of the previous single-chip battery, and the anode outlet voltage of the next single-chip battery. The detection parameters are relatively small, the calculation amount is relatively small, which is conducive to improving the accuracy of detection.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a voltage inspection device for a fuel cell stack according to an embodiment of the present invention;

[0032] Figure 2 The figure is a flow chart of a voltage inspection method for a fuel cell stack according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] Voltage inspection device 100;

[0035] A first connector 1;

[0036] The second connector 2;

[0037] Voltage inspection module 3; first wiring group 31; first wiring terminal 311; second wiring group 32; second wiring terminal 321; grounding terminal 33;

[0038] Host computer 4;

[0039] Monolithic battery 200; anode inlet 201; anode outlet 202;

[0040] First direction X; second direction Y. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0042] The following describes a fuel cell stack voltage inspection device 100 , a voltage inspection method, and a vehicle according to an embodiment of the present invention with reference to the accompanying drawings.

[0043] like Figure 1 As shown, the voltage inspection device 100 of the fuel cell stack according to the first aspect of the embodiment of the present invention includes: a plurality of first connectors 1, a plurality of second connectors 2 and a voltage inspection module 3, the plurality of first connectors 1 are connected one-to-one with the plurality of monolithic cells 200, and each first connector 1 is arranged at the anode inlet 201 of the corresponding monolithic cell 200, the plurality of second connectors 2 are connected one-to-one with the plurality of monolithic cells 200, and each second connector 2 is arranged at the anode outlet 202 of the corresponding monolithic cell 200, and the voltage inspection module 3 is electrically connected to the plurality of first connectors 1 and the plurality of second connectors 2 to respectively obtain the first voltage and the second voltage of each monolithic cell 200.

[0044] Specifically, Figure 1 As shown, the fuel cell stack includes a plurality of monolithic cells 200 sequentially stacked in series, wherein a first connector 1 is correspondingly arranged at the anode inlet 201 of each monolithic cell 200, and a second connector 2 is correspondingly arranged at the anode outlet 202 of each monolithic cell 200. Optionally, the first connector 1 and the second connector 2 are both made of metal materials. For example, the first connector 1 and the second connector 2 can be made of metals such as copper and aluminum. Further, continue to refer to Figure 1As shown, in order to facilitate the fixed installation of the first connector 1 and the second connector 2, the first connector 1 is installed at the corner position at the anode inlet 201 of the single-chip battery 200, and the second connector 2 is installed at the corner position at the anode outlet 202 of the single-chip battery 200, wherein the first connector 1 is used to obtain the first voltage at the anode inlet 201 of the single-chip battery 200, and the second connector 2 is used to obtain the second voltage at the anode outlet 202 of the single-chip battery 200.

[0045] The first connector 1 and the second connector 2 of each single-chip battery 200 are electrically connected to the voltage inspection module 3. For example, assuming that the fuel cell stack is provided with n single-chip batteries 200 stacked in series, the voltage inspection module 3 is used to simultaneously obtain the first voltage at the anode inlet 201 and the second voltage at the anode outlet 202 of each single-chip battery 200, that is, 2n voltage signals can be obtained at the same time, thereby ensuring the synchronization of the voltage signal collection of each single-chip battery 200, providing convenience for the subsequent fault diagnosis of the fuel cell stack, and helping to improve the fault diagnosis efficiency of the fuel cell stack.

[0046] According to the voltage patrol device 100 of the fuel cell stack according to an embodiment of the present invention, the voltage patrol module 3 of the voltage patrol device 100 can simultaneously obtain the first voltage at the anode inlet 201 and the second voltage at the anode outlet 202 of each single-chip battery 200 through the first connector 1 and the second connector 2, thereby ensuring the synchronization of voltage signal acquisition of each single-chip battery 200, providing convenience for subsequent fault diagnosis of the fuel cell stack, and helping to improve the fault diagnosis efficiency of the fuel cell stack.

[0047] In some embodiments of the present invention, the voltage inspection module 3 is also used to obtain the anode inlet voltage of the current single-chip battery based on the first voltage of the current single-chip battery and the first voltage of the previous single-chip battery, and to obtain the anode outlet voltage of the current single-chip battery based on the second voltage of the current single-chip battery and the second voltage of the previous single-chip battery.

[0048] It should be noted that since the fuel cell stack is composed of a plurality of monolithic cells 200 stacked in series, except for the first monolithic cell in the fuel cell stack, the first voltage at the anode inlet 201 and the second voltage at the anode outlet 202 of each of the remaining monolithic cells obtained by the voltage inspection module 3 are not the actual anode inlet voltage and anode outlet voltage of the current monolithic cell.

[0049] Specifically, it is assumed that the fuel cell stack is provided with n monolithic cells 200 stacked in series, that is, the n monolithic cells 200 are stacked in series from the first monolithic cell to the nth monolithic cell, wherein the first voltage and the second voltage of the first monolithic cell acquired by the voltage inspection module 3 are the anode inlet voltage and the anode outlet voltage of the first monolithic cell, respectively. Further, the specific expression is as follows:

[0050]

[0051] in, is the first voltage of the first monolithic battery, is the second voltage of the first monolithic battery, is the anode inlet voltage of the first monolithic cell, is the anode outlet voltage of the first monolithic battery.

[0052] Furthermore, since the monolithic cells 200 in the fuel cell stack are arranged in series, the anode inlet voltage of the second monolithic cell is the first voltage of the second monolithic cell minus the first voltage of the first monolithic cell, and the anode outlet voltage of the second monolithic cell is the second voltage of the second monolithic cell minus the second voltage of the first monolithic cell. The specific expression is as follows:

[0053]

[0054] in, is the anode inlet voltage of the second monolithic battery, is the first voltage of the second monolithic battery, is the first voltage of the first monolithic battery, is the anode outlet voltage of the second monolithic battery, is the second voltage of the second monolithic battery, is the second voltage of the first single-chip battery.

[0055] By analogy, the anode inlet voltage and anode outlet voltage of the i-th single-cell battery can be calculated. The specific expressions are as follows:

[0056]

[0057] Among them, 2≤i≤n, is the anode inlet voltage of the ith single cell, is the first voltage of the i-th single-cell battery, is the first voltage of the i-1th single-cell battery, is the anode outlet voltage of the ith single cell, is the second voltage of the i-th single-cell battery, is the second voltage of the i-1th single-cell battery.

[0058] In order to facilitate the fault diagnosis of the voltage inspection device 100, fault judgment is usually performed based on the anode inlet voltage and the anode outlet voltage of each single-chip battery 200. Based on this, in some embodiments of the present invention, the voltage inspection module 3 obtains the anode inlet voltage of the current single-chip battery based on the first voltage of the current single-chip battery and the first voltage of the previous single-chip battery, and obtains the anode outlet voltage of the current single-chip battery based on the second voltage of the current single-chip battery and the second voltage of the previous single-chip battery. For example, the voltage inspection module 3 can obtain the anode inlet voltage of the ith single-chip battery based on the first voltage of the ith single-chip battery and the first voltage of the i-1th single-chip battery, or can obtain the anode outlet voltage of the ith single-chip battery based on the anode outlet voltage of the ith single-chip battery and the second voltage of the ith single-chip battery. Specifically, the first voltage of the ith single-chip battery minus the first voltage of the i-1th single-chip battery is the anode inlet voltage of the ith single-chip battery. Similarly, the second voltage of the ith single-chip battery minus the second voltage of the i-1th single-chip battery is the anode outlet voltage of the ith single-chip battery. With such arrangement, the anode inlet voltage and anode outlet voltage of each single cell 200 can be calculated by the voltage inspection module 3, so that the anode inlet voltage and anode outlet voltage of each single cell 200 can be directly uploaded to the control module, reducing the calculation of the control module and facilitating the subsequent fault diagnosis of the fuel cell stack.

[0059] It should be noted that the first voltage and the second voltage of each single-chip battery 200 can also be directly uploaded to the control module, and the control module calculates the anode inlet voltage and the anode outlet voltage of each single-chip battery 200. The calculation method is consistent with the calculation method of the voltage inspection module 3, and will not be described in detail here.

[0060] In some embodiments of the present invention, Figure 1 As shown, the voltage inspection module 3 includes: a first wiring group 31, the first wiring group 31 includes a plurality of first wiring terminals 311, the plurality of first wiring terminals 311 correspond one-to-one to the plurality of first connectors 1, and each first wiring terminal 311 is electrically connected to the corresponding first connector 1; a second wiring group 32, the second wiring group 32 includes a plurality of second wiring terminals 321, the plurality of second wiring terminals 321 correspond one-to-one to the plurality of second connectors 2, and each second wiring terminal 321 is electrically connected to the corresponding second connector 2.

[0061] Specifically, Figure 1As shown, the first wiring group 31 of the voltage inspection module 3 is electrically connected to the first connector 1 on each single-chip battery 200. Specifically, the first wiring group 31 includes a plurality of first wiring terminals 311 corresponding one-to-one to the first connector 1, wherein each first wiring terminal 311 is electrically connected to the corresponding first connector 1 through a cable. Similarly, the second wiring group 32 of the voltage inspection module 3 is electrically connected to the second connector 2 on each single-chip battery 200. Specifically, the second wiring group 32 includes a plurality of second wiring terminals 321 corresponding one-to-one to the second connector 2, wherein each second wiring terminal 321 is electrically connected to the corresponding second connector 2 through a cable. With this arrangement, the first voltage and the second voltage of each single-chip battery 200 are synchronously collected, which is convenient for subsequent fault diagnosis of the fuel cell stack.

[0062] In some embodiments of the present invention, Figure 1 As shown, the first wiring group 31 and the second wiring group 32 are spaced apart along the first direction X of the voltage inspection module 3, and the multiple first wiring terminals 311 of the first wiring group 31 are distributed in sequence along the second direction Y of the voltage inspection module 3, and the multiple second wiring terminals 321 of the second wiring group 32 are distributed in sequence along the second direction Y of the voltage inspection module 3.

[0063] Specifically, the first wiring group 31 and the second wiring group 32 are arranged at intervals in the first direction X, so as to ensure that each first wiring terminal 311 in the first wiring group 31 is spaced apart from the second wiring terminal 321 in the second wiring group 32, and the multiple first wiring terminals 311 of the first wiring group 31 are distributed in sequence along the second direction Y of the voltage inspection module 3, and the multiple second wiring terminals 321 of the second wiring group 32 are distributed in sequence along the second direction Y of the voltage inspection module 3. Such an arrangement not only facilitates the connection setting between the first wiring terminal 311 and the first connector 1, and the second wiring terminal 321 and the second connector 2, but also reserves sufficient installation space to avoid interference during the wiring process, and facilitates the installation and disassembly of the connecting cables, facilitates subsequent maintenance and replacement, and the overall layout is beautiful and the wiring is clear, which facilitates troubleshooting.

[0064] It should be noted that each first terminal 311 in the first connection group corresponds one-to-one to the second terminal 321 in the second connection group. For example, the leftmost first connection terminal in the first connection group and the leftmost second connection terminal in the second connection group are electrically connected to the first connector 1 and the second connector 2 on the same single-chip battery 200, respectively, thereby making the overall layout of the voltage inspection device 100 more beautiful and the wiring clearer, further improving the efficiency of troubleshooting.

[0065] In some embodiments of the present invention, Figure 1As shown, the voltage inspection module 3 further includes: a grounding terminal 33, which is suitable for grounding so that the voltage inspection module 3 can obtain the first voltage and the second voltage of each single cell 200. In other words, the grounding terminal 33 of the voltage inspection module 3 is grounded, so that the first voltage and the second voltage of each single cell 200 obtained are both ground voltages. Compared with the traditional differential voltage acquisition system, such a setting can improve the voltage acquisition accuracy, which is conducive to improving the fault detection accuracy of the fuel cell.

[0066] In some embodiments of the present invention, Figure 1 As shown, it also includes: a host computer 4, which is in communication connection with the voltage inspection module 3 to send a fault detection instruction to the voltage inspection module 3, so that the voltage inspection module 3 obtains the first voltage and the second voltage of each single-chip battery 200 according to the fault detection instruction.

[0067] Specifically, the voltage inspection device 100 also includes a host computer 4, which is communicatively connected to the voltage inspection module 3. During the fault detection process, the host computer 4 sends a fault detection instruction to the voltage inspection module 3, and the voltage inspection module 3 obtains the first voltage and the second voltage of each single-chip battery 200 according to the fault detection instruction. The voltage inspection module 3 can directly send the obtained first voltage and second voltage of each single-chip battery 200 to the host computer 4, so that the host computer 4 can perform fault detection according to the obtained first voltage and second voltage, or the voltage inspection module 3 sends the calculated anode input voltage and anode output voltage of each single-chip battery 200 to the host computer 4, so that the host computer 4 can perform fault detection according to the obtained anode input voltage and anode output voltage. With this arrangement, automatic fault detection of the voltage inspection device 100 is realized, and the automation testing level of the voltage inspection device 100 is improved.

[0068] It should be noted that the fault detection instruction can be a sequential fault detection instruction for a single-chip battery 200, that is, each single-chip battery 200 in the fuel cell stack is fault-detected in sequence according to the fault detection instruction. The fault detection instruction can also be a selection fault detection instruction for a single-chip battery 200, that is, the single-chip battery 200 to be detected is selected for fault detection according to the fault detection instruction.

[0069] The vehicle according to the second aspect of the present invention comprises the fuel cell stack voltage patrol device 100 according to the first aspect of the present invention.

[0070] According to the vehicle of the embodiment of the present invention, by providing the above-mentioned voltage patrol device 100 of the fuel cell stack, the voltage patrol module 3 of the voltage patrol device 100 can simultaneously obtain the first voltage at the anode inlet 201 and the second voltage at the anode outlet 202 of each single-chip battery 200 through the first connector 1 and the second connector 2, thereby ensuring the synchronization of voltage signal acquisition of each single-chip battery 200, providing convenience for subsequent fault diagnosis of the fuel cell stack, and being beneficial to improving the fault diagnosis efficiency of the fuel cell stack.

[0071] Figure 2 A voltage inspection method for a fuel cell stack according to an embodiment of the present invention is provided. It should be noted that the fuel cell stack includes a plurality of monolithic cells stacked in series, and the voltage inspection method is applied to the voltage inspection device in the embodiment of the first aspect. Further, as Figure 2 As shown, the voltage inspection method of the fuel cell stack includes:

[0072] Step S101, obtaining the anode inlet voltage of the current single cell, the anode outlet voltage of the current single cell, the anode outlet voltage of the previous single cell of the current single cell, and the anode outlet voltage of the next single cell of the current single cell;

[0073] Specifically, when fault detection is performed on each single cell in the fuel cell stack, the anode inlet voltage of the current single cell, the anode outlet voltage of the current single cell, the anode outlet voltage of the previous single cell of the current single cell, and the anode outlet voltage of the next single cell of the current single cell are obtained. For example, assuming that the fuel cell stack is provided with n single cells stacked in series, and the single cell currently to be detected is the i-th single cell, then the anode inlet voltage of the i-th single cell, the anode outlet voltage of the i-th single cell, the anode outlet voltage of the i-1-th single cell, and the anode outlet voltage of the i+1-th single cell are obtained respectively. The specific expressions are as follows:

[0074]

[0075] Among them, 2≤i≤n, is the anode inlet voltage of the ith single cell, is the first voltage of the i-th single-cell battery, is the first voltage of the i-1th single-cell battery, is the anode outlet voltage of the ith single cell, is the second voltage of the i-th single-cell battery, is the second voltage of the i-1th single-cell battery, is the second voltage of the i-1th single-cell battery, is the second voltage of the i-1th single-cell battery, is the anode outlet voltage of the i-1th single cell, is the anode outlet voltage of the i+1th single cell.

[0076] Step S102 , performing fault detection on the fuel cell stack according to the anode inlet voltage of the current single cell, the anode outlet voltage of the current single cell, the anode outlet voltage of the previous single cell and the anode outlet voltage of the next single cell to obtain a voltage inspection result.

[0077] Specifically, when it is necessary to perform fault detection on the ith monolithic battery, fault detection is performed on the ith monolithic battery of the fuel cell stack based on the obtained anode inlet voltage of the ith monolithic battery, the anode outlet voltage of the ith monolithic battery, the anode outlet voltage of the i-1th monolithic battery, and the anode outlet voltage of the i+1th monolithic battery to determine whether the ith monolithic battery is faulty. Since the fault detection uses fewer detection parameters, the amount of calculation is greatly reduced, which is beneficial to improving the accuracy of fault detection.

[0078] According to the voltage inspection method of the fuel cell stack of the embodiment of the present invention, the anode inlet voltage of the current single-chip cell, the anode outlet voltage of the current single-chip cell, the anode outlet voltage of the previous single-chip cell, and the anode outlet voltage of the next single-chip cell are obtained, and the fuel cell stack is fault-detected according to the anode inlet voltage of the current single-chip cell, the anode outlet voltage of the current single-chip cell, the anode outlet voltage of the previous single-chip cell, and the anode outlet voltage of the next single-chip cell, so as to obtain the voltage inspection result. Therefore, when detecting whether the current single-chip cell has a fault, the fault detection can be realized according to the anode inlet voltage of the current single-chip cell, the anode outlet voltage of the current single-chip cell, the anode outlet voltage of the previous single-chip cell, and the anode outlet voltage of the next single-chip cell, and the detection parameters are relatively small, and the amount of calculation is relatively small, which is conducive to improving the accuracy of the detection.

[0079] In some embodiments of the present invention, fault detection is performed on the fuel cell stack based on the anode inlet voltage of the current monolithic cell, the anode outlet voltage of the current monolithic cell, the anode outlet voltage of the previous monolithic cell, and the anode outlet voltage of the next monolithic cell to obtain voltage inspection results, including: if the anode inlet voltage of the current monolithic cell is greater than a first voltage value and less than k times the average value of the sum of the anode inlet voltages of multiple battery cells, and the anode outlet voltage of the current monolithic cell is less than a second voltage value, and the anode outlet voltage of the previous monolithic cell is greater than k times the average value of the sum of the anode outlet voltages of multiple battery cells, and the anode outlet voltage of the next monolithic cell is greater than k times the average value of the sum of the anode outlet voltages of multiple battery cells, then it is determined that a fault has occurred in the fuel cell stack, wherein k satisfies the relationship: 1.06≤k≤1.07.

[0080] Specifically, when fault detection is performed on a fuel cell stack provided with n monolithic cells, assuming that when the voltage inspection module detects the ith monolithic cell, if the anode inlet voltage of the ith monolithic cell is greater than the first voltage value and less than k times the average value of the sum of the anode inlet voltages of n battery cells, and the anode outlet voltage of the ith monolithic cell is less than the second voltage value, and the anode outlet voltage of the i-1th monolithic cell is greater than k times the average value of the sum of the anode outlet voltages of n battery cells, and the anode outlet voltage of the i+1th monolithic cell is greater than k times the average value of the sum of the anode outlet voltages of n battery cells, then it is determined that a fault has occurred in the fuel cell stack, wherein k satisfies the relationship: 1.06≤k≤1.07, the first voltage value is 0.5V, and the second voltage value is 0.2V.

[0081] The specific expression is as follows:

[0082]

[0083]

[0084]

[0085]

[0086] in, is the anode inlet voltage of the ith single cell, is the anode outlet voltage of the ith single cell, is the sum of the anode inlet voltages of n battery cells, It is the sum of the anode outlet voltages of n battery cells.

[0087] Therefore, after obtaining the anode inlet voltage and anode outlet voltage of each single-chip battery, when it is necessary to perform fault detection on the current single-chip battery, the fault detection can be achieved by comparing the anode inlet voltage of the current single-chip battery, the anode outlet voltage of the current single-chip battery, the anode outlet voltage of the previous single-chip battery, and the anode outlet voltage of the next single-chip battery with their respective corresponding parameters. The diagnostic method has a small amount of calculation, which is conducive to improving the accuracy of detection.

[0088] In order to implement the above-mentioned embodiment, according to the fourth aspect of the present invention, a computer-readable storage medium is proposed, on which a voltage patrol program of a fuel cell stack is stored. When the voltage patrol program of the fuel cell stack is executed by a processor, the voltage patrol method of the fuel cell stack of the above-mentioned embodiment is implemented.

[0089] According to the computer-readable storage medium of an embodiment of the present invention, through the voltage inspection method of the fuel cell stack, when detecting whether the current single-chip battery has a fault, fault detection can be achieved based on the anode inlet voltage of the current single-chip battery, the anode outlet voltage of the current single-chip battery, the anode outlet voltage of the previous single-chip battery, and the anode outlet voltage of the next single-chip battery. The detection parameters are relatively small, the calculation amount is relatively small, which is conducive to improving the accuracy of detection.

[0090] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable storage medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable storage media include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0091] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0094] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A voltage inspection device for a fuel cell stack, characterized in that: The fuel cell stack comprises a plurality of monolithic cells sequentially stacked in series, and the voltage inspection device comprises: A plurality of first connectors, wherein the plurality of first connectors are connected to the plurality of single-chip batteries in a one-to-one correspondence, and each of the first connectors is disposed at the anode inlet of the corresponding single-chip battery; A plurality of second connectors, wherein the plurality of second connectors are connected to the plurality of single-chip batteries in a one-to-one correspondence, and each second connector is disposed at the anode outlet of the corresponding single-chip battery; A voltage inspection module is electrically connected to the first connectors and the second connectors to respectively obtain the first voltage and the second voltage of each of the single-chip batteries.

2. The voltage inspection device according to claim 1, characterized in that: The voltage inspection module is also used to obtain the anode inlet voltage of the current single-chip battery according to the first voltage of the current single-chip battery and the first voltage of the previous single-chip battery, and to obtain the anode outlet voltage of the current single-chip battery according to the second voltage of the current single-chip battery and the second voltage of the previous single-chip battery.

3. The voltage inspection device according to claim 2, characterized in that: The voltage inspection module comprises: A first wiring group, wherein the first wiring group includes a plurality of first wiring terminals, the plurality of first wiring terminals correspond to the plurality of first plug-in connectors one by one, and each of the first wiring terminals is electrically connected to a corresponding first plug-in connector; The second wiring group includes a plurality of second wiring terminals, the plurality of second wiring terminals correspond one-to-one to the plurality of second plug-in connectors, and each of the second wiring terminals is electrically connected to the corresponding second plug-in connector.

4. The voltage inspection device according to claim 3, characterized in that: The first wiring group and the second wiring group are spaced apart along a first direction of the voltage patrol module, and a plurality of the first wiring terminals of the first wiring group are spaced apart in sequence along a second direction of the voltage patrol module, and a plurality of the second wiring terminals of the second wiring group are spaced apart in sequence along the second direction of the voltage patrol module.

5. The voltage inspection device according to claim 2, characterized in that: The voltage inspection module further includes: a grounding terminal, wherein the grounding terminal is suitable for being grounded so that the voltage inspection module can obtain the first voltage and the second voltage of each of the single-chip batteries.

6. The voltage inspection device according to any one of claims 1 to 5, characterized in that: Also includes: A host computer is communicatively connected with the voltage inspection module to send a fault detection instruction to the voltage inspection module, so that the voltage inspection module obtains the first voltage and the second voltage of each single-chip battery according to the fault detection instruction.

7. A vehicle, characterized in that: A voltage patrol device for a fuel cell stack comprising the device according to any one of claims 1 to 6.

8. A method for voltage inspection of a fuel cell stack, characterized in that: The fuel cell stack includes a plurality of monolithic cells stacked in series, and the voltage inspection method is applied to the voltage inspection device according to any one of claims 1 to 6, and the method includes: Obtaining an anode inlet voltage of a current single-chip battery, an anode outlet voltage of a current single-chip battery, an anode outlet voltage of a single-chip battery before the current single-chip battery, and an anode outlet voltage of a single-chip battery after the current single-chip battery; The fuel cell stack is fault-checked according to the anode inlet voltage of the current single cell, the anode outlet voltage of the current single cell, the anode outlet voltage of the previous single cell and the anode outlet voltage of the next single cell to obtain a voltage inspection result.

9. The fuel cell stack voltage inspection method according to claim 8, characterized in that: The method of performing fault detection on the fuel cell stack according to the anode inlet voltage of the current single cell, the anode outlet voltage of the current single cell, the anode outlet voltage of the previous single cell, and the anode outlet voltage of the next single cell to obtain a voltage inspection result includes: If the anode inlet voltage of the current single-cell battery is greater than the first voltage value and less than k times the average value of the sum of the anode inlet voltages of a plurality of the battery cells, and the anode outlet voltage of the current single-cell battery is less than the second voltage value, and the anode outlet voltage of the previous single-cell battery is greater than k times the average value of the sum of the anode outlet voltages of a plurality of the battery cells, and the anode outlet voltage of the next single-cell battery is greater than k times the average value of the sum of the anode outlet voltages of a plurality of the battery cells, then it is determined that the fuel cell stack has a fault, wherein k satisfies the relationship: 1.06≤k≤1.

07.

10. A computer-readable storage medium, characterized in that: A voltage inspection program of a fuel cell stack is stored thereon, and when the voltage inspection program of the fuel cell stack is executed by a processor, the voltage inspection method of the fuel cell stack as claimed in claim 8 or 9 is implemented.

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