A supercapacitor ground short protection system and method

Abstract

The disclosure provides a super capacitor ground short circuit protection system and method, the system comprising a fault point detection device and a short circuit determination device; the fault point detection device comprises a transition resistor, and the fault point detection device is used to calculate the resistance value of the transition resistor after being connected with the super capacitor, to determine whether the resistance value is less than a preset resistance value, and if so, to calculate the fault point position to obtain the super capacitor monomer at the fault point position; the short circuit determination device comprises a conductive belt, and the short circuit determination device is used to input a direct current voltage and a floating voltage to the super capacitor monomer after winding the conductive belt on the shell of the super capacitor monomer, to obtain a ground short circuit current, to determine whether the ground short circuit current is greater than a preset current, and if so, to determine that the super capacitor monomer has a short circuit fault. According to the system of the disclosure, the ground short circuit protection can be timely and accurately performed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of energy storage system management, and in particular to a ground short circuit protection system and method for supercapacitors. BACKGROUND

[0002] At present, in the power system, energy storage technology plays a huge role in the fields of "source, network, load, and use". Traditional energy storage technology mostly uses lithium ion batteries for energy storage. However, lithium ion batteries have problems such as short cycle life, poor safety performance, and low power density, which seriously affect the quality and economy of energy storage projects. Compared with lithium ion batteries, supercapacitors have the advantages of fast charging and discharging speed, high power density, long cycle life, and high safety performance, which makes supercapacitors a new choice for power frequency modulation technology and gradually used in large-scale in energy storage power stations and auxiliary frequency modulation facilities. Therefore, the safety of supercapacitors is crucial.

[0003] At present, in the process of system operation, the ground short circuit phenomenon of supercapacitors occurs from time to time. After the ground short circuit, it is not easy to detect, and the system can still run with faults. However, as the running time increases, the fault supercapacitors and the branch where they are located will experience capacity attenuation, resulting in a decrease in system operation efficiency. More seriously, the fault capacitors may overcharge and over-discharge, causing serious heating and possibly leading to safety accidents. Therefore, during system operation, it is important to accurately detect and discover the ground short circuit fault of supercapacitors in a timely manner, and to attract the attention of the operating personnel, and to eliminate the ground fault, which is important for improving the safety performance and service life of the system. SUMMARY

[0004] The present disclosure aims to at least partially solve one of the technical problems in the related art. To this end, one object of the present disclosure is to provide a ground short circuit protection system for supercapacitors, the main purpose of which is to timely and accurately perform ground short circuit protection.

[0005] A second object of the present disclosure is to provide a ground short circuit protection method for supercapacitors.

[0006] A third object of the present disclosure is to provide an electronic device.

[0007] To achieve the above-mentioned objects, a first aspect of the present disclosure provides a ground short circuit protection system for supercapacitors, comprising a fault point detection device and a short circuit determination device;

[0008] The fault point detection device comprises a transition resistor, and the fault point detection device is configured to calculate the resistance value of the transition resistor after being connected to the supercapacitor, determine whether the resistance value is less than a preset resistance value, and if so, calculate the fault point position to obtain the supercapacitor monomer at the fault point position.

[0009] The short-circuit determination device includes a conductive band, and is used for inputting a direct current voltage and a floating voltage to the super capacitor cell after winding the conductive band around the shell of the super capacitor cell, obtaining a ground short-circuit current, determining whether the ground short-circuit current is greater than a preset current, and determining that the super capacitor cell has a short-circuit fault if the ground short-circuit current is greater than the preset current.

[0010] In one embodiment of the present disclosure, the fault point detection device includes a positive electrode end, a negative electrode end, and a detection end, the positive electrode end is used for connecting a positive electrode of a super capacitor, the negative electrode end is used for connecting a negative electrode of the super capacitor, and the detection end is used for connecting an arbitrary weak insulation point of the super capacitor; the fault point detection device further includes a first resistor, a second resistor, a third resistor, and a fourth resistor connected in series between the positive electrode end and the negative electrode end; the fault point detection device further includes a fifth resistor, a first switch, and a second switch, one end of the fifth resistor is connected to a common end of the third resistor and the fourth resistor, the other end of the fifth resistor is grounded and connected to one end of a transition resistor, the other end of the transition resistor is the detection end, the first switch is connected in parallel with the second resistor, and the second switch is connected in parallel with the third resistor.

[0011] In one embodiment of the present disclosure, the fault point detection device is specifically used for: obtaining a first voltage between the positive electrode end and the negative electrode end and a second voltage between two ends of the fifth resistor when the first switch is closed and the second switch is opened; obtaining a third voltage between the positive electrode end and the negative electrode end and a fourth voltage between two ends of the fifth resistor when the first switch is opened and the second switch is closed; and calculating a resistance value of the transition resistor and a fault point position based on the first voltage, the second voltage, the third voltage, the fourth voltage, the first resistor, the second resistor, and the fifth resistor.

[0012] In one embodiment of the present disclosure, the fault point detection device is specifically used for: obtaining a pressure difference based on the first voltage, the second voltage, the third voltage, and the fourth voltage; obtaining a resistance value coefficient based on the first resistor and the second resistor; obtaining the resistance value of the transition resistor based on the pressure difference, the resistance value coefficient, the fifth resistor, and the first voltage; and obtaining the fault point position based on the pressure difference, the resistance value coefficient, and the third voltage.

[0013] In one embodiment of the present disclosure, the short-circuit determination device includes a direct current power supply, an ammeter, and a floating power supply, a positive electrode of the direct current power supply is connected to the conductive band through the ammeter, a negative electrode of the direct current power supply is used for connecting a negative electrode of a super capacitor cell, a positive electrode of the floating power supply is used for connecting a positive electrode of the super capacitor cell, a negative electrode of the floating power supply is used for connecting a negative electrode of the super capacitor cell, the conductive band is grounded, and the ammeter is used for displaying a ground short-circuit current.

[0014] In one embodiment of the present disclosure, the conductive strip is a metal lead strip or a conductive aluminum foil tape.

[0015] To achieve the above object, the second aspect of the present disclosure also provides a super capacitor grounding short circuit protection method of a super capacitor grounding short circuit protection system based on any one of the above embodiments, comprising:

[0016] After the super capacitor is connected with the fault point detection device, the resistance value of the transition resistor in the fault point detection device is calculated;

[0017] It is judged whether the resistance value is less than a preset resistance value, and if so, the fault point position is calculated to obtain the super capacitor monomer at the fault point position.

[0018] After the conductive strip is wound around the shell of the super capacitor monomer, the direct current voltage and the floating voltage input to the super capacitor monomer are controlled to obtain the grounding short circuit current.

[0019] It is judged whether the grounding short circuit current is greater than a preset current, and if so, it is determined that the super capacitor monomer has a short circuit fault.

[0020] In one embodiment of the present disclosure, the calculation of the resistance value of the transition resistor in the fault point detection device comprises: obtaining a first voltage between the positive terminal and the negative terminal and a second voltage across the fifth resistor when the first switch is closed and the second switch is open; obtaining a third voltage between the positive terminal and the negative terminal and a fourth voltage across the fifth resistor when the first switch is open and the second switch is closed; and calculating the resistance value of the transition resistor based on the first voltage, the second voltage, the third voltage, the fourth voltage, the first resistor, the second resistor and the fifth resistor.

[0021] In one embodiment of the present disclosure, the calculation of the fault point position comprises: obtaining a pressure difference based on the first voltage, the second voltage, the third voltage and the fourth voltage; obtaining a resistance value coefficient based on the first resistor and the second resistor; and obtaining the fault point position based on the pressure difference, the resistance value coefficient and the third voltage.

[0022] To achieve the above object, the third aspect of the present disclosure also provides an electronic device, comprising: at least one processor; and a memory in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the super capacitor grounding short circuit protection method of the second aspect of the present disclosure.

[0023] In one or more embodiments of the present disclosure, the ground short circuit protection system of the super capacitor comprises a fault point detection device and a short circuit determination device; the fault point detection device comprises a transition resistor, and the fault point detection device is used to calculate the resistance value of the transition resistor after being connected with the super capacitor, to determine whether the resistance value is less than a preset resistance value, and if so, to calculate the fault point position to obtain the super capacitor monomer at the fault point position; the short circuit determination device comprises a conductive belt, and the short circuit determination device is used to input a direct current voltage and a floating voltage to the super capacitor monomer after winding the conductive belt on the shell of the super capacitor monomer, to obtain a ground short circuit current, to determine whether the ground short circuit current is greater than a preset current, and if so, to determine that the super capacitor monomer has a short circuit fault. In this case, the transition resistor in the fault point detection device is used to determine the fault point position, and the short circuit determination device is used to determine the ground short circuit current, so as to determine whether the super capacitor monomer has a short circuit fault. Thus, the ground short circuit protection can be performed in time and accurately.

[0024] Additional aspects and advantages of the present disclosure will be made apparent from the following description of embodiments of the present disclosure, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the present disclosure will become apparent and more readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A block diagram of a ground short circuit protection system of a super capacitor provided by an embodiment of the present disclosure is shown;

[0027] Figure 2 A circuit diagram of a fault point detection device provided by an embodiment of the present disclosure is shown;

[0028] Figure 3 A connection schematic diagram of a short circuit determination device and a super capacitor monomer provided by an embodiment of the present disclosure is shown;

[0029] Figure 4 A flowchart of a ground short circuit protection method of a super capacitor provided by an embodiment of the present disclosure is shown;

[0030] Figure 5 A structural schematic diagram of an electronic device provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0031] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements, unless the context clearly dictates otherwise. The following description of exemplary embodiments is not representative of all possible embodiments consistent with the present disclosure. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0032] In the description of the present disclosure, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present description and the features of the different embodiments or examples without contradiction.

[0033] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited. It should also be understood that the term "and / or" used in the present disclosure means and includes any or all possible combinations of one or more associated listed items.

[0034] The embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0035] The present disclosure relates to a supercapacitor ground short circuit protection system and method, the main purpose of which is to timely and accurately protect the ground short circuit. The supercapacitor ground short circuit protection system and method disclosed in the present disclosure can be simply referred to as a ground short circuit protection system and method.

[0036] In the first embodiment, Figure 1 The block diagram of the supercapacitor ground short circuit protection system provided by the embodiments of the present disclosure is shown. As shown in the figure, Figure 1As shown, the ground short-circuit protection system 10 of the super capacitor includes a fault point detection device 11 and a short-circuit determination device 12.

[0037] In the embodiment, the super capacitor to which the ground short-circuit protection system is applied includes a plurality of single bodies, and each single body is connected in series to form the super capacitor.

[0038] In the embodiment, the fault point detection device 11 is configured to determine the fault point position of the super capacitor. Specifically, the fault point detection device 11 includes a transition resistance, and the fault point detection device 11 is configured to calculate the resistance value of the transition resistance after being connected to the super capacitor, determine whether the resistance value is less than a preset resistance value, and if so, calculate the fault point position to obtain the single body of the super capacitor at the fault point position. The transition resistance can be represented by Rg.

[0039] In some embodiments, the fault point detection device 11 includes a positive terminal, a negative terminal, and a detection terminal. The positive terminal is configured to be connected to the positive electrode of the super capacitor, the negative terminal is configured to be connected to the negative electrode of the super capacitor, and the detection terminal is configured to be connected to any weak insulation point of the super capacitor.

[0040] Figure 2 A circuit diagram of the fault point detection device provided by the embodiment of the present disclosure is shown. In some embodiments, as shown in Figure 2 The fault point detection device 11 further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4 connected in series between the positive terminal and the negative terminal. The resistance value of the first resistor R1 is equal to the resistance value of the fourth resistor R4, and the resistance value of the second resistor R2 is equal to the resistance value of the third resistor R3.

[0041] In some embodiments, as shown in Figure 2 The fault point detection device 11 further includes a fifth resistor R5, a first switch S1, and a second switch S2. One end of the fifth resistor R5 is connected to the common terminal of the third resistor R3 and the fourth resistor R4, the other end of the fifth resistor R5 is grounded and connected to one end of the transition resistance Rg, and the other end of the transition resistance Rg is the detection terminal. The detection terminal is connected to a weak insulation point X of the super capacitor. The weak insulation point X divides the super capacitor into two parts, i.e., a first part from the positive electrode of the super capacitor to the weak insulation point X and a second part from the negative electrode of the super capacitor to the weak insulation point X. The voltage of the first part can be represented by U1, and the voltage of the second part can be represented by U2.

[0042] In some embodiments, as shown in Figure 2 The first switch S1 is connected in parallel with the second resistor R2, and the second switch S2 is connected in parallel with the third resistor R3.

[0043] In some embodiments, the fault point detection apparatus 11 is specifically configured to: obtain a first voltage between the positive terminal and the negative terminal and a second voltage across the fifth resistor R5 when the first switch S1 is closed and the second switch S2 is open; obtain a third voltage between the positive terminal and the negative terminal and a fourth voltage across the fifth resistor R5 when the first switch S1 is open and the second switch S2 is closed; and calculate a resistance value of the transition resistor Rg and the fault point position based on the first voltage, the second voltage, the third voltage, the fourth voltage, the first resistor R1, the second resistor R2 and the fifth resistor R5. The first voltage is the working voltage across the super capacitor group when the first switch S1 is closed and the second switch S2 is open. The second voltage is the working voltage across the super capacitor group when the first switch S1 is open and the second switch S2 is closed. The first voltage is denoted by Uw, and the second voltage is denoted by U’w. The third voltage is denoted by Um, and the fourth voltage is denoted by U’m.

[0044] In some embodiments, the fault point detection apparatus 11 is specifically configured to: obtain a voltage difference based on the first voltage, the second voltage, the third voltage and the fourth voltage; obtain a resistance coefficient based on the first resistor R1 and the second resistor R2; obtain the resistance value of the transition resistor Rg based on the voltage difference, the resistance coefficient, the fifth resistor R5 and the first voltage; and obtain the fault point position based on the voltage difference, the resistance coefficient and the third voltage.

[0045] In some embodiments, the voltage difference △U satisfies: △U = Um - k * U’m, k represents a voltage coefficient, and k = Uw / U’w. The resistance coefficient m satisfies: m = R1 / (2R1+R2). The resistance value of the transition resistor Rg is obtained based on the voltage difference △U, the resistance coefficient m, the fifth resistor R5 and the first voltage Uw. The transition resistor Rg satisfies:

[0046]

[0047] In the formula, R ∑ = 2R 1+2 .

[0048] In some embodiments, the preset resistance value is, for example, 5kΩ. The fault point detection apparatus 11 judges whether the resistance value of the transition resistor Rg is less than the preset resistance value. If yes, the fault point detection apparatus 11 calculates the fault point position. The fault point position is the fault position of the weak insulation point X of the super capacitor corresponding to the super capacitor monomer.

[0049] In some embodiments, the fault point position can be denoted by a, and the fault point position a satisfies:

[0050]

[0051] In some embodiments, if the resistance value of the transition resistor Rg is less than the preset resistance value, the fault point detection apparatus 11 sends a ground short circuit fault alarm signal.

[0052] In the embodiment, after the fault point position is obtained, the supercapacitor cell at the fault point position is acquired.

[0053] In the embodiment, the short circuit determination device 12 is configured to determine whether the supercapacitor cell at the fault point position has a short circuit fault. Specifically, the short circuit determination device 12 comprises a conductive tape. The short circuit determination device 12 is configured to input a direct current voltage and a floating voltage to the supercapacitor cell after winding the conductive tape around the shell of the supercapacitor cell, obtain a ground short circuit current, determine whether the ground short circuit current is greater than a preset current, and determine that the supercapacitor cell has a short circuit fault if the ground short circuit current is greater than the preset current. In this way, the supercapacitor cell having a ground short circuit can be further tested for the ground short circuit, and the accuracy of the short circuit determination can be improved.

[0054] In some embodiments, the short circuit determination device 12 comprises a direct current power supply, an ammeter, and a floating power supply. The direct current power supply is configured to provide a direct current voltage. The direct current voltage can be denoted as Udc, and the unit is V. The floating power supply is configured to provide a floating voltage. The floating voltage can be denoted as Ufl, and the unit is V. The negative pole of the direct current power supply Udc is configured to be connected to the negative pole of the supercapacitor cell, the positive pole of the floating power supply Ufl is configured to be connected to the positive pole of the supercapacitor cell, the negative pole of the floating power supply Ufl is configured to be connected to the negative pole of the supercapacitor cell, one end of the ammeter is connected to the positive pole of the direct current power supply Udc, and the other end of the ammeter is connected to the conductive tape. The conductive tape is grounded. The ammeter is configured to display the ground short circuit current.

[0055] In some embodiments, the conductive tape is a metal lead tape or a conductive aluminum foil tape.

[0056] In some embodiments, before winding the conductive tape around the shell of the supercapacitor cell, the surface of the supercapacitor cell can be cleaned first. In this way, the influence of dust and other impurities on the shell on the test results can be reduced.

[0057] Figure 3 A connection schematic diagram of the short circuit determination device and the supercapacitor cell provided by the embodiment of the present disclosure is shown. In some embodiments, as shown in FIG. 1, the short circuit determination device 12 is connected to the supercapacitor cell 1. The short circuit determination device 12 comprises a direct current power supply 121, an ammeter 122, and a floating power supply 123. Figure 3As shown, the conductive band S is wound on the shell between the positive and negative electrodes of the supercapacitor cell. The positive electrode of the direct current power supply Udc is connected with the conductive band through an ammeter, the negative electrode of the direct current power supply Udc is connected with the negative electrode of the supercapacitor cell, the positive electrode of the floating power supply Ufl is connected with the positive electrode of the supercapacitor cell, and the negative electrode of the floating power supply Ufl is connected with the negative electrode of the supercapacitor cell. The conductive band S is grounded, and the ammeter A is used to display the grounding short-circuit current. The short-circuit determination device 11 applies the direct current voltage Udc to the supercapacitor cell, and charges the supercapacitor cell with the floating voltage Ufl at the same time, and determines whether the grounding short-circuit current is greater than a preset current. If yes, it is determined that the supercapacitor cell has a short-circuit fault.

[0058] In some embodiments, the preset current is, for example, 10 mA. If the grounding short-circuit current is greater than 10 mA, the insulation ability of the supercapacitor cell to the ground is reduced, and there is a short-circuit fault, which should be replaced.

[0059] In some embodiments, measures should be taken to prevent the risk of electric shock, explosion and fire when the short-circuit determination device 11 performs the grounding short-circuit test on the supercapacitor cell.

[0060] In the grounding short-circuit protection system of the supercapacitor in the present disclosure, the grounding short-circuit protection system comprises a fault point detection device and a short-circuit determination device. The fault point detection device comprises a transition resistor, and is used to calculate the resistance value of the transition resistor after being connected with the supercapacitor, determine whether the resistance value is less than a preset resistance value, and calculate the fault point position if yes, so as to obtain the supercapacitor cell at the fault point position. The short-circuit determination device comprises a conductive band, and is used to input a direct current voltage and a floating voltage to the supercapacitor cell after winding the conductive band on the shell of the supercapacitor cell, obtain a grounding short-circuit current, determine whether the grounding short-circuit current is greater than a preset current, and determine that the supercapacitor cell has a short-circuit fault if yes. In this case, the transition resistor in the fault point detection device is used to determine the fault point position, so that the supercapacitor cell having a short-circuit fault can be preliminarily determined, and then the short-circuit determination device is used to determine the grounding short-circuit current, so that whether the supercapacitor cell has a short-circuit fault can be further determined. Thus, the accuracy of the short-circuit determination is improved, and the grounding short-circuit protection can be timely and accurately performed, so that the grounding protection of the supercapacitor cell and the grounding short-circuit protection of the supercapacitor energy storage system are realized.

[0061] The following is an embodiment of the method of the present disclosure. For details not disclosed in the embodiment of the method of the present disclosure, please refer to the system embodiment of the present disclosure. The method embodiment of the present disclosure proposes a grounding short-circuit protection method of a supercapacitor. The grounding short-circuit protection method of the supercapacitor realizes the grounding short-circuit protection by using the grounding short-circuit protection system of the supercapacitor in the above system embodiment.

[0062] Figure 4 A flowchart of a method for protecting a supercapacitor from a ground short circuit is shown. As shown in the figure, the method for protecting the supercapacitor from the ground short circuit includes the following steps. Figure 4

[0063] S11, after the supercapacitor is connected to a fault point detection device, the resistance value of a transition resistor in the fault point detection device is calculated.

[0064] S12, it is determined whether the resistance value is less than a preset resistance value. If yes, the fault point position is calculated to obtain a supercapacitor cell at the fault point position.

[0065] S13, after a conductive tape is wound around the shell of the supercapacitor cell, a direct current voltage and a floating voltage are input to the supercapacitor cell to obtain a ground short circuit current.

[0066] S14, it is determined whether the ground short circuit current is greater than a preset current. If yes, it is determined that the supercapacitor cell has a short circuit fault.

[0067] Optionally, the resistance value of the transition resistor in the fault point detection device is calculated by obtaining a first voltage between the positive terminal and the negative terminal and a second voltage across the fifth resistor when the first switch is closed and the second switch is open; obtaining a third voltage between the positive terminal and the negative terminal and a fourth voltage across the fifth resistor when the first switch is open and the second switch is closed; and calculating the resistance value of the transition resistor based on the first voltage, the second voltage, the third voltage, the fourth voltage, the first resistor, the second resistor, and the fifth resistor.

[0068] Optionally, the fault point position is calculated by obtaining a voltage difference based on the first voltage, the second voltage, the third voltage, and the fourth voltage; obtaining a resistance value coefficient based on the first resistor and the second resistor; and obtaining the fault point position based on the voltage difference, the resistance value coefficient, and the third voltage.

[0069] It should be noted that the above description of the embodiment of the supercapacitor ground short circuit protection system also applies to the method for protecting the supercapacitor from the ground short circuit, which will not be repeated here.

[0070] The above sequence numbers of the embodiments of the present disclosure are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0071] ​In the method for protecting the supercapacitor from ground short circuit, after the supercapacitor is connected with the fault point detection device, the resistance value of the transition resistor in the fault point detection device is calculated; whether the resistance value is less than a preset resistance value is judged, if yes, the fault point position is calculated to obtain the supercapacitor monomer at the fault point position; after a conductive tape is wound around the shell of the supercapacitor monomer, the direct current voltage and the floating voltage input to the supercapacitor monomer are controlled to obtain the ground short circuit current; whether the ground short circuit current is greater than a preset current is judged, if yes, it is determined that the supercapacitor monomer has a short circuit fault. In this case, the fault point position is determined by using the transition resistor in the fault point detection device, the supercapacitor monomer having the short circuit fault is preliminarily determined, and then the ground short circuit current is determined to further determine whether the supercapacitor monomer has the short circuit fault. Thus, the accuracy of the short circuit determination is improved, and the ground short circuit protection can be performed in time and accurately, so that the ground protection of the supercapacitor monomer and the ground short circuit protection of the supercapacitor energy storage system are realized.

[0072] According to embodiments of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.

[0073] Figure 5 A structure schematic diagram of an electronic device provided by an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular telephones, smart phones, wearable electronic devices, and other similar computing devices. The components shown in the present disclosure, the connections and relationships between the components, and the functions of the components are merely examples and are not intended to limit the implementation of the present disclosure described and / or claimed in the present disclosure.

[0074] As shown in Figure 5 The electronic device 20 includes a computing unit 21 that can perform various appropriate actions and processes in accordance with a computer program stored in a read-only memory (ROM) 22 or a computer program loaded from a storage unit 28 into a random access memory (RAM) 23. In the RAM 23, various programs and data required for the operation of the electronic device 20 can also be stored. The computing unit 21, the ROM 22, and the RAM 23 are connected to each other through a bus 24. An input / output (I / O) interface 25 is also connected to the bus 24.

[0075] A plurality of components in the electronic device 20 are connected to the I / O interface 25, including: an input unit 26, such as a keyboard, a mouse, etc.; an output unit 27, such as various types of displays, speakers, etc.; a storage unit 28, such as a magnetic disk, an optical disk, etc., which is communicatively connected with the computing unit 21; and a communication unit 29, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 29 allows the electronic device 20 to exchange information / data with other electronic devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0076] The computing unit 21 can be various general and / or special purpose processing components with processing and computing capabilities. Some examples of the computing unit 21 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The computing unit 21 performs various methods and processes described above, such as performing the ground short protection method for supercapacitors. For example, in some embodiments, the ground short protection method for supercapacitors can be implemented as a computer software program, which is tangibly embodied in a machine-readable medium, such as the storage unit 28. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 20 via the ROM 22 and / or the communication unit 29. When the computer program is loaded onto the RAM 23 and executed by the computing unit 21, one or more steps of the ground short protection method for supercapacitors described above can be performed. Alternatively, in other embodiments, the computing unit 21 can be configured to perform the ground short protection method for supercapacitors by any other appropriate means, such as by means of firmware.

[0077] Various implementations of the systems and techniques described above in this disclosure can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic electronic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0078] Program code for carrying out methods of the present disclosure can be written in any combination of one or more programming languages. The program code can be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the program code, when executed by the processor or controller, produces the functions / operations specified in the flowcharts and / or the block diagrams. The program code can be executed entirely on a machine, partially on a machine, partially on a machine as a standalone software package, or entirely on a remote machine or server.

[0079] In the present disclosure, a machine readable medium can be a tangible medium that can contain or store program for use by or in connection with an instruction execution system, apparatus, or electronic device. The machine readable medium can be a machine readable signal medium or a machine readable storage medium. The machine readable medium can include, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or electronic device, or any suitable combination of the foregoing. More specific examples of the machine readable storage medium can include, but not limited to, an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage electronic device, a magnetic storage electronic device, or any suitable combination of the foregoing.

[0080] To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0081] The systems and techniques described herein can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described herein), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), the Internet, and a blockchain network.

[0082] The computer system can include clients and servers. This relationship can be. The servers are generally remote from the users and can be accessed via the Internet using a communication network. The programs have the form of computer programs, which are run on the respective computers and have a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system. It solves the defects of large management difficulty and weak business scalability in traditional physical host and VPS (Virtual Private Server, or VPS for short) services. The server can also be a server of a distributed system or a server combined with a blockchain.

[0083] It should be understood that various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present disclosure can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.

[0084] The above detailed description does not constitute a limitation on the scope of protection of the present disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A ground fault protection system for a supercapacitor, characterized in that, Includes fault detection devices and short-circuit determination devices; The fault point detection device includes a transition resistor. After being connected to the supercapacitor, the fault point detection device is used to calculate the resistance value of the transition resistor, determine whether the resistance value is less than a preset resistance value, and if it is less than the preset resistance value, calculate the fault point location to obtain the supercapacitor cell at the fault point location. The short circuit determination device includes a conductive strip. After the conductive strip is wrapped around the outer shell of the supercapacitor cell, the short circuit determination device is used to input a DC voltage and a float charge voltage to the supercapacitor cell to obtain a ground short circuit current and determine whether the ground short circuit current is greater than a preset current. If it is greater, the supercapacitor cell is determined to have a short circuit fault. The fault detection device includes a positive terminal, a negative terminal, and a detection terminal. The positive terminal is used to connect to the positive terminal of the supercapacitor, the negative terminal is used to connect to the negative terminal of the supercapacitor, and the detection terminal is used to connect to any weak point in the insulation of the supercapacitor. The fault detection device also includes a first resistor, a second resistor, a third resistor, and a fourth resistor connected in series with the positive terminal and the negative terminal. The fault detection device further includes a fifth resistor, a first switch, and a second switch. One end of the fifth resistor is connected to the common terminal of the third and fourth resistors, and the other end of the fifth resistor is grounded and simultaneously connected to one end of the transition resistor. The other end of the transition resistor is the detection terminal. The first switch is connected in parallel with the second resistor, and the second switch is connected in parallel with the third resistor.

2. The grounding short-circuit protection system for supercapacitors as described in claim 1, characterized in that, The fault point detection device is specifically used for: Obtain the first voltage between the positive and negative terminals and the second voltage across the fifth resistor when the first switch is closed and the second switch is open; Obtain the third voltage between the positive and negative terminals and the fourth voltage across the fifth resistor when the first switch is open and the second switch is closed; Based on the first voltage, second voltage, third voltage, fourth voltage, first resistor, second resistor, and fifth resistor, the resistance value of the transition resistor and the location of the fault point are calculated.

3. The grounding short-circuit protection system for supercapacitors as described in claim 2, characterized in that, The fault point detection device is specifically used for: The voltage difference is obtained based on the first voltage, the second voltage, the third voltage, and the fourth voltage; The resistance coefficient is obtained based on the first and second resistors; The resistance value of the transition resistor is obtained based on the pressure difference, resistance coefficient, fifth resistor, and first voltage. The location of the fault point is determined based on the pressure difference, resistance coefficient, and third voltage.

4. The grounding short-circuit protection system for a supercapacitor as described in claim 1 or 3, characterized in that, The short-circuit detection device includes a DC power supply, an ammeter, and a float charging power supply. The positive terminal of the DC power supply is connected to the conductive strip via the ammeter. The negative terminal of the DC power supply is used to connect to the negative terminal of a single supercapacitor cell. The positive terminal of the float charging power supply is used to connect to the positive terminal of a single supercapacitor cell. The negative terminal of the float charging power supply is used to connect to the negative terminal of a single supercapacitor cell. The conductive strip is grounded, and the ammeter is used to display the ground short-circuit current.

5. The grounding short-circuit protection system for a supercapacitor as described in claim 4, characterized in that, The conductive strip is made of metal lead strip or conductive aluminum foil tape.

6. A method for protecting a supercapacitor from grounding short circuit based on a grounding short circuit protection system for a supercapacitor as described in any one of claims 1-5, characterized in that, include: After the supercapacitor is connected to the fault detection device, calculate the resistance value of the transition resistor in the fault detection device. Determine whether the resistance value is less than a preset resistance value. If it is less, calculate the location of the fault point to obtain the supercapacitor cell at the location of the fault point. After the conductive strip is wrapped around the outer shell of the supercapacitor cell, a DC voltage and a float charge voltage are controlled to be input to the supercapacitor cell to obtain a ground short-circuit current. Determine whether the ground short-circuit current is greater than a preset current. If it is greater, then determine that the supercapacitor cell has a short-circuit fault.

7. The grounding short-circuit protection method for supercapacitors as described in claim 6, characterized in that, The calculation of the resistance value of the transition resistor in the fault point detection device includes: Obtain the first voltage between the positive and negative terminals and the second voltage across the fifth resistor when the first switch is closed and the second switch is open; Obtain the third voltage between the positive and negative terminals and the fourth voltage across the fifth resistor when the first switch is open and the second switch is closed; The resistance value of the transition resistor is calculated based on the first voltage, second voltage, third voltage, fourth voltage, first resistor, second resistor, and fifth resistor.

8. The method for protecting a supercapacitor from grounding short circuit as described in claim 7, characterized in that, The calculation of the fault location includes: The voltage difference is obtained based on the first voltage, the second voltage, the third voltage, and the fourth voltage; The resistance coefficient is obtained based on the first and second resistors; The location of the fault point is determined based on the pressure difference, resistance coefficient, and third voltage.

9. An electronic device, characterized in that, include: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the grounding short-circuit protection method for the supercapacitor according to any one of claims 6-8.

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