CN113589200A - Supercapacitor connection fault detection method and system - Google Patents
Supercapacitor connection fault detection method and system Download PDFInfo
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- CN113589200A CN113589200A CN202110870303.9A CN202110870303A CN113589200A CN 113589200 A CN113589200 A CN 113589200A CN 202110870303 A CN202110870303 A CN 202110870303A CN 113589200 A CN113589200 A CN 113589200A
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- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 239000003990 capacitor Substances 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000004146 energy storage Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/64—Testing of capacitors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
Abstract
The invention relates to a method and a system for detecting connection faults of a super capacitor, wherein the method comprises the steps of S1, detecting whether a power supply is electrified or not, and when the detection result is yes, obtaining that the system enters a power-on working mode, and executing S2; s2, judging whether the power failure operation identification state is 1, and if not, calculating the voltage V at two ends of the super capacitor within t seconds, and executing S3; s3, judging whether the voltage V is larger than or equal to the upper limit Vmax of the voltage value when the super capacitor is fully charged, if so, obtaining that the super capacitor has a connection fault, and if not, obtaining that the super capacitor is normally connected. The method and the system ensure the judgment accuracy, and are convenient and quick.
Description
Technical Field
The invention relates to the field of electronic products, in particular to a method and a system for detecting connection faults of a super capacitor.
Background
The super capacitor is used as a novel energy storage device between a traditional capacitor and a rechargeable battery, has the characteristics of rapid charging and discharging of the capacitor and the energy storage characteristic of the battery, and is widely applied due to the advantages of high power density, long cycle life and the like.
However, the super capacitor is usually large in size, and the connection failure of the connection sheet on the super capacitor may occur due to vibration stress during the transportation of the product or corrosion on the operation site, and once the connection failure of the super capacitor occurs, the operation of the product may be seriously affected, so that it is necessary to design a system and a method for effectively determining the connection failure of the super capacitor.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a method for detecting connection failure of a super capacitor, which can accurately and quickly determine whether the super capacitor has connection failure.
The invention also aims to provide a super capacitor connection fault detection system capable of accurately and quickly judging whether the super capacitor has connection faults or not.
In order to achieve the purpose, the technical scheme of the invention is as follows: a super capacitor connection fault detection method is characterized in that: the method comprises the following steps of,
s1, detecting whether the power supply is electrified, and when the detection result is yes, obtaining that the system enters a power-on working mode, and executing S2;
s2, judging whether the power failure operation identification state is 1, and if not, calculating the voltage V at two ends of the super capacitor within t seconds, and executing S3;
s3, judging whether the voltage V is larger than or equal to the upper limit Vmax of the voltage value when the super capacitor is fully charged, if so, obtaining that the super capacitor has a connection fault, and if not, obtaining that the super capacitor is normally connected.
Further, the method further comprises the step of obtaining that the connection of the super capacitor is normal when the judgment result in the step S2 is yes.
Further, the method further includes, when the detection result in S1 is no, performing the following operation,
s11, obtaining that the system enters a power-down working mode, and executing S12;
and S12, detecting whether the power supply is electrified, if so, setting the power down operation identification state to be 1, obtaining that the system enters the power-on working mode, executing S2, otherwise, continuing to execute S11.
Further, the method further comprises recording an event and sending a fault indication after the connection fault of the super capacitor is obtained.
Further, the method also comprises the following operations before detecting whether the power supply is electrified,
s01, the MCU module is powered on and reset;
and S02, setting zero and operating the power-down operation identifier state.
Further, the value of t is less than 2 s.
Furthermore, the Vmax is 4.7V when the power supply voltage is 5V.
A supercapacitor connection failure detection system is characterized in that: the system comprises a plurality of devices which are connected with each other,
a power supply module;
the detection method is adopted to judge whether the super capacitor has an MCU module with a connection fault, the MCU module comprises a power-on detection module and an ADC sampling module, and the power-on detection module is electrically connected with the power module to detect whether the power module is electrified;
the super capacitor is respectively connected with the power supply module and the MCU module, and is in a charging state when the power supply module supplies power to the MCU module and supplies power to the MCU module when the power supply module is powered off;
and the first voltage division network is connected with the ADC sampling module in parallel and transmits the divided voltage to the ADC sampling module so that the MCU module can calculate the voltage V at the two ends of the super capacitor.
Furthermore, the system also comprises a second voltage division network connected in parallel at two ends of the power module, and the second voltage division network is connected with the power-on detection module and transmits the divided voltage to the power-on detection module so that the MCU module can judge whether the power module is powered.
Further, the first voltage division network is formed by connecting a first resistor and a second resistor in series, and the second voltage division network is formed by connecting a third resistor and a fourth resistor in series.
Compared with the prior art, the invention has the advantages that:
whether the power supply is electrified or not is judged, whether the power-down operation identifier is set to be 1 or not is judged under the condition that the power supply is electrified, and when the power-down operation identifier is not 1, the voltage at two ends of the super capacitor is judged and compared with the upper limit value of the voltage when the super capacitor is fully electrified, when the connection fault of the super capacitor exists, the characteristic that the detected voltage value is larger than or equal to the power supply voltage is ingeniously utilized, whether the connection fault of the super capacitor exists or not is accurately judged, and the judgment accuracy is ensured.
Drawings
Fig. 1 is a flowchart of a supercapacitor connection fault detection method according to the present application.
Fig. 2 is a block diagram of a supercapacitor connection failure detection system according to the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Fig. 1 shows a flowchart of a supercapacitor connection fault detection method according to the present application, and fig. 2 shows a system corresponding to the detection method when the detection method is implemented. As shown, the supercapacitor connection failure detection method includes,
s1, detecting whether the power supply is electrified, and when the detection result is yes, obtaining that the system enters a power-on working mode, and executing S2;
s2, judging whether the power failure operation identification state is 1, and if not, calculating the voltage V at two ends of the super capacitor within t seconds, and executing S3;
s3, judging whether the voltage V is larger than or equal to the upper limit Vmax of the voltage value when the super capacitor is fully charged, if so, obtaining that the super capacitor has a connection fault, and if not, obtaining that the super capacitor is normally connected.
And after the connection fault of the super capacitor is obtained, the method can record an event and send out a fault indication. In this embodiment, t is less than 2s, Vmax is 4.7V, and the corresponding power supply voltage is 5V.
If the power-down operation identifier state is judged to be 1 in S2, the connection of the super capacitor is normal.
When the power supply is in the non-electric state, the connection of the super capacitor cannot be judged whether a fault exists, so that the connection of the super capacitor needs to be judged whether the power supply is in the electric state, and subsequent judgment operation can be carried out only when the power supply is in the electric state.
Meanwhile, if the super capacitor can enter a power-down operation mode, the super capacitor is bound to be in a connection fault state, otherwise, if the super capacitor has the connection fault state, the super capacitor cannot enter the power-down operation mode when a power supply is not electrified, namely the power supply is powered down.
Furthermore, when there is a connection failure of the super capacitor, the voltage measured by the first voltage division network, which will be described later, is equal to or higher than the power supply voltage in the power supply charged state.
The detection system utilizes the characteristics and is designed to accurately judge the connection fault of the super capacitor, and the detection system is explained later.
The method further includes, when the result of the detection in S1 is no, performing the following operation,
s11, obtaining that the system enters a power-down working mode, and executing S12;
and S12, detecting whether the power supply is electrified, if so, setting the power down operation identification state to be 1, obtaining that the system enters the power-on working mode, executing S2, otherwise, continuing to execute S11.
In order to make the judgment result accurate, the method also executes the following operations before detecting whether the power supply is electrified,
s01, the MCU module is powered on and reset;
and S02, setting zero and operating the power-down operation identifier state.
In order to facilitate the implementation of the method and to facilitate understanding, a detection system corresponding to the method is explained below.
A super capacitor connection fault detection system comprises a power supply module 1, an MCU module 3 which adopts the detection method to judge whether a connection fault exists in a super capacitor 2, the super capacitor 2 which is respectively connected with the power supply module 1 and the MCU module 3, and a first voltage division network 4 which is connected in parallel with two ends of the super capacitor 2.
The MCU module 3 comprises a power-on detection module 31 and an ADC sampling module 32, wherein the power-on detection module 31 is electrically connected with the power module 1 to detect whether the power module 1 is electrified; the super capacitor 2 is in a charging state when the power supply module 1 supplies power to the MCU module 3 and is in a discharging state when the power supply module 1 is powered down so as to supply power to the MCU module 3; the first voltage division network 4 is connected to the ADC sampling module 32 and transmits the divided voltage to the ADC sampling module 32, so that the MCU module 3 calculates the voltage V across the super capacitor 2.
In order to facilitate accurate measurement of whether the power module 1 is powered or not, the system further comprises a second voltage division network 5 connected in parallel at two ends of the power module 1, wherein the second voltage division network 5 is connected with the power-on detection module 31 and transmits the divided voltage to the power-on detection module 31, so that the MCU module 3 can judge whether the power module 1 is powered or not.
As shown in fig. 2, the first voltage-dividing network 4 is formed by connecting a first resistor R1 and a second resistor R2 in series, and the second voltage-dividing network 5 is formed by connecting a third resistor R3 and a fourth resistor R4 in series.
The operation of the system is described below.
When the power module 1 is powered on, the load is directly powered through the diode D1, and the super capacitor 2 is charged through the diode D0 and the R0, and when the power module 1 is powered off, the super capacitor 2 is powered on the load through the diode D2, as can be seen from fig. 2, and the load here mainly refers to the MCU module 3.
A first voltage division network formed by a first resistor R1 and a second resistor R2 is connected in parallel at two ends of the super capacitor 2, the voltage of the super capacitor 2 is converted into the input voltage range of an ADC sampling module 32 of the MCU module 3, a program in the MCU module 3 calculates an ADC sampling value, and the ADC sampling value is converted into a real voltage value at two ends of the super capacitor 2 according to the voltage division ratio of the resistors R1 and R2; and the second voltage division network formed by the third resistor R3 and the fourth resistor R4 is used for converting the voltage division of the power supply module 1 into the input voltage range of the power-on detection module POD of the MCU module 3 to detect whether the power supply is electrified or not.
Therefore, by matching the detection system with the detection method, whether the connection fault exists in the super capacitor is well judged, and the detection method is quick, simple and convenient.
While embodiments of the invention have been shown and described, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A super capacitor connection fault detection method is characterized in that: the method comprises the following steps of,
s1, detecting whether the power supply is electrified, and when the detection result is yes, obtaining that the system enters a power-on working mode, and executing S2;
s2, judging whether the power failure operation identification state is 1, and if not, calculating the voltage V at two ends of the super capacitor within t seconds, and executing S3;
s3, judging whether the voltage V is larger than or equal to the upper limit Vmax of the voltage value when the super capacitor is fully charged, if so, obtaining that the super capacitor has a connection fault, and if not, obtaining that the super capacitor is normally connected.
2. The detection method according to claim 1, characterized in that:
the method further comprises the step of obtaining that the connection of the super capacitor is normal when the judgment result in the step S2 is yes.
3. The detection method according to claim 2, characterized in that: the method further includes, when the result of the detection in S1 is no, performing operations,
s11, obtaining that the system enters a power-down working mode, and executing S12;
and S12, detecting whether the power supply is electrified, if so, setting the power down operation identification state to be 1, obtaining that the system enters the power-on working mode, executing S2, otherwise, continuing to execute S11.
4. The detection method according to claim 2, characterized in that:
the method further comprises recording events and sending fault indications after the connection fault of the super capacitor is obtained.
5. The detection method according to claim 3, characterized in that: the method further comprises, before detecting whether the power supply is powered, performing operations,
s01, the MCU module is powered on and reset;
and S02, setting zero and operating the power-down operation identifier state.
6. The detection method according to claim 1, characterized in that:
the value of t is less than 2 s.
7. The detection method according to claim 1, characterized in that:
and the Vmax is 4.7V when the power supply voltage is equal to 5V.
8. A supercapacitor connection failure detection system is characterized in that: the system comprises a plurality of devices which are connected with each other,
a power module (1);
an MCU module (3) for judging whether the super capacitor (2) has a connection fault by adopting the detection method of any one of claims 1-5, wherein the MCU module (3) comprises a power-on detection module (31) and an ADC sampling module (32), and the power-on detection module (31) is electrically connected with the power supply module (1) to detect whether the power supply module (1) has electricity;
the super capacitor (2) is respectively connected with the power module (1) and the MCU module (3), and is in a charging state when the power module (1) supplies power to the MCU module (3) and is in a discharging state when the power module (1) is powered off so as to supply power to the MCU module (3);
the voltage divider network (4) is connected with two ends of the super capacitor (2) in parallel, the first voltage divider network (4) is connected with the ADC sampling module (32) and transmits the divided voltage to the ADC sampling module (32) so that the MCU module (3) can calculate the voltage V at two ends of the super capacitor (2).
9. The detection system of claim 8, wherein:
the system further comprises a second voltage division network (5) which is connected in parallel to two ends of the power module (1), wherein the second voltage division network (5) is connected with the power-on detection module (31) and transmits the divided voltage to the power-on detection module (31) so that the MCU module (3) can judge whether the power module is powered or not.
10. The detection system of claim 9, wherein:
the first voltage division network (4) is formed by connecting a first resistor (R1) and a second resistor (R2) in series, and the second voltage division network (5) is formed by connecting a third resistor (R3) and a fourth resistor (R4) in series.
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