Shared power bank and disconnection detection method thereof

Abstract

The present invention relates to a shared power bank and a disconnection detection method thereof, comprising: measuring the voltage U of the charging line after the shared power bank that is not disconnected leaves the cabinet and is charging the external terminal; after the shared power bank finishes the last exit from the cabinet and is stored in the cabinet, continuously measuring the voltages U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharge state according to the frequency; calculating the mean voltage and standard deviation of the voltages U1, U2, U3, ..., UN of the charging line; judging whether the charging line is disconnected according to the voltage U, the mean voltage and the standard deviation; wherein, if, or, the charging line is disconnected; otherwise, the charging line is not disconnected. The shared power bank and the disconnection detection method thereof of the present invention reduce the disconnection misjudgment rate of the charging line by changing the disconnection detection mechanism of the power bank.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile shared charging, and in particular to a shared power bank and a disconnection detection method thereof. Background Art

[0002] With the widespread popularity of mobile devices, users' demand for charging is increasing, especially in public places, and the use of power banks has become a common solution. The shared power bank business has emerged to meet users' charging needs when they are out by providing power banks for use and facilitating their return. However, the current shared power banks face the problem of charging line disconnection monitoring during use, which is specifically manifested in the following three aspects:

[0003] First, existing power bank systems usually rely on detecting the voltage of the charging line during the user's charging process to determine whether the charging line is disconnected. This method has certain limitations. Once the user improperly operates the charging line (such as pulling, stepping on, etc.) during use, causing the charging line to be disconnected, the system may not be able to accurately detect it; especially because the power bank system relies on the disconnection detection results during the user's charging process, when the user performs improper operations before returning the cabinet after charging, it will lead to a misjudgment of the charging line being disconnected, that is, the system determines that the charging line is not disconnected, but in fact it is disconnected, which will cause subsequent users to face the problem of being unable to charge when using the same power bank.

[0004] There is also a situation where the system judges that the charging cable is disconnected, but in fact it is not. In the existing solution, regardless of whether it is a misjudgment, as long as the system detects that the cable is disconnected, the power bank cannot be returned to the cabinet and needs to be reported to the system and maintenance personnel need to be on site to solve it, which greatly affects the user experience.

[0005] Secondly, currently when a shared power bank is returned, the cabinet uses a preset disconnection detection mechanism to determine the status of the charging cable. However, the detection during the return process depends on many factors, such as the sensitivity of the sensor, the status of the device, etc., and is prone to misjudgment. For example, during the return process, due to poor contact or sensor failure, the charging cable may be mistakenly judged to be in good condition, but in fact there is hidden damage, or the charging cable may be mistakenly judged to be disconnected, but in fact it is not, thus affecting the service life of the power bank and the experience of other users. Summary of the invention

[0006] To this end, the present invention aims to solve the problem in the prior art that disconnection detection of shared power banks is prone to misjudgment, and to provide a shared power bank and a disconnection detection method thereof, thereby reducing the misjudgment rate of charging line disconnection by changing the disconnection detection mechanism of the power bank.

[0007] In a first aspect, in order to solve the above technical problems, the present invention provides a method for detecting disconnection of a shared power bank, wherein the shared power bank has at least one charging line, and the shared power bank is configured to charge the external terminal after the charging line is connected to the external terminal, and the detection method includes:

[0008] After the shared power bank that is not disconnected leaves the cabinet and is charging the external terminal, measure the voltage U of the charging line;

[0009] After the shared power bank is taken out of the cabinet and stored in the cabinet, the voltage U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharge state is continuously measured according to the frequency;

[0010] Calculate the average voltage of the charging line voltages U1, U2, U3, ..., UN and standard deviation ;

[0011] According to the voltage U, the mean voltage and standard deviation Determining whether the charging cable is disconnected;

[0012] Among them, if ,or , the charging cable is disconnected; otherwise, the charging cable is not disconnected.

[0013] In one embodiment of the present invention, according to the voltage U, the mean voltage and standard deviation Before determining whether the charging line is disconnected, the method further includes measuring the temperature T of the charging line after the shared power bank leaves the cabinet and is charging the external terminal, comparing the temperature T with the temperature T1, and if , the charging line is broken; otherwise, the charging line is not broken; wherein the temperature T1 is the charging temperature when the charging line is not broken.

[0014] In one embodiment of the present invention, the frequency is 5 min / time.

[0015] In a second aspect, in order to solve the above technical problems, the present invention further provides a shared power bank, which has at least one charging line. The shared power bank is configured to charge the external terminal after the charging line is connected to the external terminal. The shared power bank includes:

[0016] A voltage detection circuit, which is used to measure the voltage U of the charging line after the shared power bank that is not disconnected leaves the cabinet and is charging the external terminal; and is used to continuously measure the voltages U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharge state after the shared power bank has finished leaving the cabinet and is stored in the cabinet;

[0017] A calculation unit, which is used to calculate the average voltage of the voltages U1, U2, U3, ..., UN of the charging line and standard deviation ;

[0018] A line breaking determination unit is used to determine the voltage U and the mean voltage according to the voltage and standard deviation Determining whether the charging cable is disconnected;

[0019] Among them, if ,or , the charging cable is disconnected; otherwise, the charging cable is not disconnected.

[0020] In one embodiment of the present invention, a first temperature detection unit is further included, and the first temperature detection unit is used to detect the temperature T of the charging line after the shared power bank leaves the cabinet and is charging the external terminal;

[0021] The disconnection determination unit is also used to compare the temperature T and the temperature T1. , it is determined that the charging line is broken; otherwise, it is determined that the charging line is not broken; wherein the temperature T1 is the charging temperature when the charging line is not broken.

[0022] In one embodiment of the present invention, the frequency is 5 min / time.

[0023] In one embodiment of the present invention, it also includes a discharge trigger key, which is arranged on the side of the shared power bank body; when the discharge trigger key is configured to be triggered after the shared power bank is stored in the cabinet, the shared power bank enters a discharge state.

[0024] In one embodiment of the present invention, the voltage detection circuit comprises:

[0025] Resistor 1, a first end of which is connected to the positive electrode of the charging line;

[0026] Resistor 2, a first end of which is connected to the second end of resistor 1, and a second end of which is connected to the negative electrode of the charging line;

[0027] A first detection terminal, which is connected to the second terminal of the resistor 1 and the first terminal of the resistor 2 at the same time;

[0028] A second detection terminal connected to the second end of the resistor 2;

[0029] The voltage U of the charging line includes the detection voltages of the first detection end and the second detection end.

[0030] In one embodiment of the present invention, it also includes a second temperature detection unit, which is used to detect the temperature T of the shared power bank after the shared power bank leaves the cabinet and is charging the external terminal. X ; Wherein, the second temperature detection unit includes multiple groups of temperature sensors, and the multiple groups of temperature sensors are arranged on the surface of the shared power bank, and the arrangement density of the temperature sensors located close to at least one side of the shared power bank is greater than its density in the central area of ​​the shared power bank.

[0031] In one embodiment of the present invention, the second temperature detection unit is also used to measure the temperature of the shared power bank in the discharge state after the shared power bank is last taken out of the cabinet and stored in the cabinet. , by comparing the temperature T X and the temperature Determine whether the shared power bank is damaged.

[0032] The above technical solution of the present invention has the following beneficial effects compared with the prior art:

[0033] The shared power bank and its disconnection detection method described in the present invention are as follows: after the shared power bank that has not been disconnected is borrowed out of the cabinet, and the user terminal measures the voltage U of the charging line in the charging state (that is, the shared power bank is in the discharging state); regardless of whether the charging line is disconnected or not, the user can return it to the cabinet normally after finishing charging, avoiding the poor user experience caused by the misjudgment of the shared power bank that has not been disconnected; after entering the cabinet, the voltages U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharging state are continuously measured at a certain frequency, and the average voltage of the voltages U1, U2, U3, ..., UN is calculated according to the average voltage of the voltages U1, U2, U3, ..., UN. and standard deviation To analyze the voltage U, it is possible to determine whether the charging line is disconnected with high accuracy, thereby reducing the misjudgment rate of the charging line disconnection. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0035] Figure 1 This is a schematic diagram of the structure of a shared power bank in a preferred embodiment of the present invention;

[0036] Figure 2This is a module block diagram of a shared power bank in a preferred embodiment of the present invention;

[0037] Figure 3 for Figure 2 The partial circuit schematic diagram of the voltage detection circuit of the shared power bank shown;

[0038] Figure 4 This is a schematic diagram of the structure in which a shared power bank is equipped with multiple groups of temperature sensors in a preferred embodiment of the present invention;

[0039] Figure 5 This is a flow chart of a method for detecting disconnection of a shared power bank in a preferred embodiment of the present invention.

[0040] Explanation of the reference numerals in the specification: 10 - power bank body, 20 - charging cable, 30 - voltage detection circuit, 40 - memory, 50 - calculation unit, 60 - disconnection determination unit, 70 - first temperature detection unit, 80 - second temperature detection unit, 81 - temperature sensor. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Embodiment 1

[0042] The embodiment of the present invention discloses a shared power bank, referring to Figure 1 As shown, the shared power bank includes a power bank body 10, and three charging cables 20 connected to the power bank body 10: a Type-C charging cable, an Apple charging cable, and a Micro-USB charging cable; of course, according to actual use needs, four, five or even more charging cables can also be included. For example, in addition to the above three charging cables, there are more Apple charging cables, Type-C charging cables or Micro-USB charging cables.

[0043] The shared power bank is configured to charge the external terminal after the charging cable 20 is connected to the external terminal; the shared power bank is configured with a set of voltage detection circuits 30 corresponding to each charging cable, and corresponding to the shared power bank configured with the voltage detection circuit 30, each charging cable has three wires, namely a positive line, a negative line and a detection line.

[0044] Reference Figure 3As shown, the voltage detection circuit 30 includes a resistor R1, a resistor R2, a first detection terminal A and a second detection terminal B. The first end of the resistor R1 is connected to the positive electrode of the charging line 20 (corresponding to the positive line), the first end of the resistor R2 is connected to the second end of the resistor R1, and the second end of the resistor R2 is connected to the negative electrode of the charging line 20 (corresponding to the negative line); the first detection terminal A is connected to the second end of the resistor R1 and the first end of the resistor R2 at the same time; the second detection terminal B is connected to the second end of the resistor R2. After the shared power bank that is not disconnected is lent out, the user connects the terminal to be charged through the interface of the charging line. When the shared power bank charges the user terminal, the voltage UA of the first detection terminal A and the voltage UB of the second detection terminal B are collected. When the voltage UA and the voltage UB are zero, it can be determined that the positive line of the charging line is disconnected; when the voltage UA is not equal to zero, and the voltage UB is zero, it can be determined that the negative line of the charging line is disconnected.

[0045] The voltage detection circuit 30 can detect the voltage value of the positive line and the negative line of each charging line when the power bank charges the user terminal, and determine whether the corresponding line is broken based on the voltage value.

[0046] Reference Figure 2 As shown, the shared power bank also has a memory 40, and the voltage values ​​of each wire of the charging cable are stored in the memory 40, which is read by the system when the power bank is returned to the cabinet.

[0047] After the current user finishes using the shared power bank, the shared power bank of the present invention can be returned to the cabinet normally after the user finishes charging, regardless of whether the charging line is disconnected, so as to avoid the poor user experience caused by the misjudgment of no disconnection. After the shared power bank is put into the cabinet, the voltage of the charging line is first measured for the first time by the voltage detection circuit 30, and the measurement method is the same as the above method, and the detected charging line voltage value is stored in the memory 40;

[0048] Subsequently, the shared power bank starts the charging mode in the cabinet. During the charging process, the voltage detection circuit 30 continuously measures the voltage U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharge state according to the frequency; for example, according to the power of the existing power bank, the remaining power of the power bank is calculated as 10%, and it is expected to be fully charged in 215 minutes after entering the cabinet. During this process, the voltage detection circuit 30 detects the voltage of the charging line at a frequency of 5 minutes / time, and obtains the voltage U1, U2, U3, ..., U44. Combined with the first measurement data after entering the cabinet, there are a total of 45 groups of charging line voltage data, which are all stored in the memory 40 for the system to use when determining whether the charging line is disconnected. The shared power bank of the present invention detects the voltage of the charging line multiple times, and determines whether the charging line is disconnected in combination with the multiple detection results, thereby greatly reducing the disconnection misjudgment rate caused by various factors. In particular, the detection is started after the shared power bank enters the cabinet, which can lock the problem of charging line disconnection caused by improper operation during the period between the user's charging and entering the cabinet.

[0049] Furthermore, the shared power bank also includes a calculation unit 50 and a disconnection determination unit 60; it should be noted that the calculation unit 50 and the disconnection determination unit 60 can be configured inside the shared power bank, inside a cabinet, or on a remote server; when configured inside the shared power bank, the shared power bank independently completes voltage detection and disconnection determination of the charging line; when configured in a cabinet or a remote server, all detection data are stored in the memory 40, and the shared power bank is returned to the cabinet for reading and use by the system.

[0050] Specifically, the calculation unit 50 is used to calculate the average voltage of the voltages U1, U2, U3, ..., U44 of the charging line and standard deviation The disconnection determination unit 60 is used to determine the voltage U and the mean voltage according to the voltage and standard deviation Determine whether the charging line is disconnected; specifically, the determination method of the disconnection determination unit 60 is as follows: ,or , the charging cable is disconnected; otherwise, the charging cable is not disconnected. The shared power bank of the present invention reduces the disconnection misjudgment rate to less than 0.2% by changing the disconnection detection mechanism of the power bank.

[0051] In some specific usage environments, for example, when the positive or negative line of the charging cable has cracks but is not completely broken due to some improper operation, the shared power bank described in the embodiment of the present invention also includes a first temperature detection unit 70, which is used to detect the temperature T of the charging cable after the shared power bank leaves the cabinet and is charging the external terminal; the temperature T is stored in the memory 40, and the shared power bank is returned to the cabinet for use by the system; the disconnection judgment unit 60 is also used to compare the temperature T and the temperature T1, if , it is determined that the charging line is broken; otherwise, it is determined that the charging line is not broken; wherein the temperature T1 is the charging temperature when the charging line is not broken.

[0052] In a specific application scenario, if the positive or / and negative wire of the charging cable is cracked due to improper operation but not completely broken, the charging cable voltage detected by the voltage detection circuit 30 may be normal. If it cannot be recognized normally, it will affect the subsequent service life and user experience of the shared power bank (damage to the charging cable will cause abnormal local temperature rise, and the user will feel hot). After the shared power bank is returned to the cabinet, the first temperature detection unit 70 is first started to detect the temperature T of the charging cable. If , it is directly determined that the charging line is disconnected, the voltage detection of the charging line disconnection detection is not started, the treasure is directly locked, and the system is uploaded to notify the maintenance personnel to come to the scene for processing; if , it is preliminarily determined that the charging line is not disconnected, and voltage detection is started; in this way, potential disconnection problems of the charging line can be discovered, further reducing the misjudgment rate.

[0053] Further, refer to Figure 1 As shown, the shared power bank also includes a discharge trigger key K, which is arranged on the side of the shared power bank body 10; when the discharge trigger key K is configured to be triggered after the shared power bank is stored in the cabinet, the shared power bank enters a discharge state.

[0054] In a specific application scenario, the shared power bank supports a simultaneous charging and discharging mode, that is, it can discharge while charging; the shared power bank starts the charging mode after being returned to the cabinet, and triggers the discharge trigger key K to cause the shared power bank to discharge briefly. Through the voltage detection circuit 30, the charging line voltage can only be accurately detected when the shared power bank is in a discharging state.

[0055] Furthermore, the shared power bank also includes a second temperature detection unit 80, which is used to detect the temperature T of the shared power bank after the shared power bank leaves the cabinet and is charging the external terminal. X; and, used to measure the temperature of the shared power bank in the discharge state after the shared power bank has finished its last outing and is stored in the cabinet. , by comparing the temperature T X and the temperature Determine whether the shared power bank is damaged.

[0056] In a specific application scenario, the heat generated by the lithium-ion battery power bank during discharge is greater than the heat generated during charging. The second temperature detection unit 80 detects the temperature T of the shared power bank when discharging with a load. X Temperature when charging and discharging with and without load ,like , it is determined that the shared power bank is damaged. The temperature T X and the temperature The information is stored in the memory 40 for the system to determine whether the power bank is damaged. Once it is determined that the power bank is damaged, the power bank is directly locked and maintenance personnel are notified to come to the scene for processing.

[0057] Further, see Figure 4 As shown, the second temperature detection unit 80 includes multiple groups of temperature sensors 81, which are arranged on the surface of the power bank body 10 of the shared power bank, and the arrangement density of the temperature sensors 81 located close to at least one side of the power bank body 10 is greater than the density in the central area of ​​the power bank body 10.

[0058] In a specific application scenario, when the shared power bank is charging a user terminal, due to the limited length of the charging cable, the user terminal is usually stacked on the power bank. The heat generated by the user terminal during charging will at least affect the temperature of the central area of ​​the power bank. For the shared power bank described in the present invention, the arrangement density of the multiple groups of temperature sensors 81 in the edge area of ​​the power bank body 10 is greater than the density in its central area, which is beneficial to improving the temperature detection accuracy of the shared power bank.

[0059] In summary, the shared power bank described in the present invention can be returned to the cabinet normally after the user finishes charging, regardless of whether the charging line is disconnected or not, avoiding the poor user experience caused by the misjudgment of no disconnection; after the shared power bank is borrowed out of the cabinet, and the user terminal measures the voltage U of the charging line in the charging state (that is, the shared power bank is in the discharging state); after entering the cabinet, the voltages U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharging state are continuously measured at a certain frequency, and the average voltage U1, U2, U3, ..., UN is calculated according to the average voltage U1, U2, U3, ..., UN. and standard deviation To analyze the voltage U, it is possible to determine whether the charging line is disconnected with high accuracy, thereby reducing the misjudgment rate of the charging line disconnection. Embodiment 2

[0060] Reference Figure 5 As shown, the embodiment of the present invention discloses a method for detecting disconnection of a shared power bank, which is used to detect disconnection of the shared power bank in the first embodiment. The detection method includes:

[0061] After the shared power bank leaves the cabinet and is charging the external terminal, the temperature T of the charging line is measured, and the temperature T is compared with the temperature T1; wherein the temperature T1 is the charging temperature when the charging line is not disconnected; if , directly return to the charging line disconnection and end the detection.

[0062] In a specific application scenario, if the positive or / and negative wire of the charging cable is cracked due to improper operation but not completely broken, the voltage of the charging cable detected by the voltage detection circuit may be normal. If it cannot be recognized normally, it will affect the subsequent service life and user experience of the shared power bank (damage to the charging cable will cause abnormal local temperature rise, and the user will feel hot). After the shared power bank is returned to the cabinet, the temperature T of the charging cable is first detected. If , it is directly determined that the charging line is disconnected, the voltage detection of the charging line disconnection detection is not started, the treasure is directly locked, and the system is uploaded to notify the maintenance personnel to come to the scene for processing; if , it is preliminarily determined that the charging line is not disconnected, and voltage detection is started; in this way, potential disconnection problems of the charging line can be discovered, further reducing the misjudgment rate.

[0063] After the shared power bank that is not disconnected leaves the cabinet and is charging the external terminal, measure the voltage U of the charging line;

[0064] After the shared power bank is taken out of the cabinet and stored in the cabinet, the voltage U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharge state is continuously measured according to the frequency;

[0065] Calculate the average voltage of the charging line voltages U1, U2, U3, ..., UN and standard deviation ;

[0066] According to the voltage U, the mean voltage and standard deviation Determining whether the charging cable is disconnected;

[0067] Among them, if ,or , the charging cable is disconnected; otherwise, the charging cable is not disconnected.

[0068] After the current user finishes using the shared power bank, regardless of whether the charging line is disconnected or not, the user can return it to the cabinet normally after charging, avoiding the misjudgment of not being disconnected and causing a poor user experience; after the shared power bank is placed in the cabinet, the voltage of the charging line is first measured by the voltage detection circuit, and the detected charging line voltage value is stored in the memory 40;

[0069] Subsequently, the shared power bank starts the charging mode in the cabinet. During the charging process, the voltage detection circuit 30 continuously measures the voltage U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharge state according to the frequency; for example, according to the power of the existing power bank, the remaining power of the power bank is calculated as 10%, and it is expected to be fully charged in 215 minutes after entering the cabinet. During this process, the voltage detection circuit 30 detects the voltage of the charging line at a frequency of 5 minutes / time, and obtains the voltage U1, U2, U3, ..., U44. Combined with the first measurement data after entering the cabinet, there are a total of 45 groups of charging line voltage data, which are all stored in the memory 40 for the system to use when determining whether the charging line is disconnected. The shared power bank of the present invention detects the voltage of the charging line multiple times, and determines whether the charging line is disconnected in combination with the multiple detection results, thereby greatly reducing the disconnection misjudgment rate caused by various factors. In particular, the detection is started after the shared power bank enters the cabinet, which can lock the problem of charging line disconnection caused by improper operation during the period between the user's charging and entering the cabinet.

[0070] Specifically, the average voltage of the voltages U1, U2, U3, ..., U44 of the charging line is calculated. and standard deviation ; According to the voltage U, the mean voltage and standard deviation Determine whether the charging line is disconnected; specifically, the determination method is as follows: ,or , the charging cable is disconnected; otherwise, the charging cable is not disconnected. The disconnection detection method of the shared power bank of the present invention reduces the disconnection misjudgment rate to less than 0.2% by changing the disconnection detection mechanism of the power bank.

[0071] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0072] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0073] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0074] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0075] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A method for detecting disconnection of a shared power bank, wherein the shared power bank has at least one charging line, and the shared power bank is configured to charge an external terminal after the charging line is connected to the external terminal, characterized in that: The detection method includes, After the shared power bank that is not disconnected leaves the cabinet and is charging the external terminal, measure the voltage U of the charging line; After the shared power bank is taken out of the cabinet and stored in the cabinet, the voltage U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharge state is continuously measured according to the frequency; Calculate the average voltage of the charging line voltages U1, U2, U3, ..., UN and standard deviation ; According to the voltage U, the mean voltage and standard deviation Determining whether the charging cable is disconnected; Among them, if ,or , the charging cable is disconnected; otherwise, the charging cable is not disconnected; The voltage of the charging line is detected by a voltage detection circuit, and the voltage detection circuit includes: Resistor 1, a first end of which is connected to the positive electrode of the charging line; Resistor 2, a first end of which is connected to the second end of resistor 1, and a second end of which is connected to the negative electrode of the charging line; A first detection terminal, which is connected to the second terminal of the resistor 1 and the first terminal of the resistor 2 at the same time; A second detection terminal connected to the second end of the resistor 2; The voltage U of the charging line includes the detection voltages of the first detection end and the second detection end.

2. The method for detecting disconnection of a shared power bank according to claim 1, characterized in that: According to the voltage U, the mean voltage and standard deviation Before determining whether the charging line is disconnected, the method further includes measuring the temperature T of the charging line after the shared power bank leaves the cabinet and is charging the external terminal, comparing the temperature T with the temperature T1, and if , the charging line is broken; otherwise, the charging line is not broken; wherein the temperature T1 is the charging temperature when the charging line is not broken.

3. The method for detecting disconnection of a shared power bank according to claim 1 or 2, characterized in that: The frequency is 5 min / time.

4. A shared power bank, which has at least one charging cable, and is configured to charge an external terminal after the charging cable is connected to the external terminal, characterized in that: The shared power bank also includes: A voltage detection circuit, which is used to measure the voltage U of the charging line after the shared power bank that is not disconnected leaves the cabinet and is charging the external terminal; and is used to continuously measure the voltages U1, U2, U3, ..., UN of the charging line of the shared power bank in the discharge state after the shared power bank has finished leaving the cabinet and is stored in the cabinet; A calculation unit, which is used to calculate the average voltage of the voltages U1, U2, U3, ..., UN of the charging line and standard deviation ; A line breaking determination unit is used to determine the voltage U and the mean voltage according to the voltage and standard deviation Determining whether the charging cable is disconnected; Among them, if ,or , the charging cable is disconnected; otherwise, the charging cable is not disconnected; The voltage detection circuit comprises: Resistor 1, a first end of which is connected to the positive electrode of the charging line; Resistor 2, a first end of which is connected to the second end of resistor 1, and a second end of which is connected to the negative electrode of the charging line; A first detection terminal, which is connected to the second terminal of the resistor 1 and the first terminal of the resistor 2 at the same time; A second detection terminal connected to the second end of the resistor 2; The voltage U of the charging line includes the detection voltages of the first detection end and the second detection end.

5. The shared power bank according to claim 4, characterized in that: It also includes a first temperature detection unit, which is used to detect the temperature T of the charging cable after the shared power bank leaves the cabinet and is charging the external terminal; The disconnection determination unit is also used to compare the temperature T and the temperature T1. , it is determined that the charging line is broken; otherwise, it is determined that the charging line is not broken; wherein the temperature T1 is the charging temperature when the charging line is not broken.

6. The shared power bank according to claim 4 or 5, characterized in that: The frequency is 5 min / time.

7. The shared power bank according to claim 4 or 5, characterized in that: It also includes a discharge trigger key, which is arranged on the side of the shared power bank body; when the discharge trigger key is configured to be triggered after the shared power bank is stored in the cabinet, the shared power bank enters a discharge state.

8. The shared power bank according to claim 4, characterized in that: It also includes a second temperature detection unit, which is used to detect the temperature T of the shared power bank after the shared power bank leaves the cabinet and is charging the external terminal. X ; Wherein, the second temperature detection unit includes multiple groups of temperature sensors, and the multiple groups of temperature sensors are arranged on the surface of the shared power bank, and the arrangement density of the temperature sensors located close to at least one side of the shared power bank is greater than its density in the central area of ​​the shared power bank.

9. The shared power bank according to claim 8, characterized in that: The second temperature detection unit is also used to measure the temperature of the shared power bank in the discharge state after the shared power bank is last taken out of the cabinet and stored in the cabinet. , by comparing the temperature T X and the temperature Determine whether the shared power bank is damaged.

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