Detection circuit and charging device

Abstract

The utility model discloses a detection circuit and a charging device. The detection circuit comprises a power supply loop; and the detection branch comprises a first end and a second end, the first end is connected in the power supply loop, the second end is used for being connected with target equipment, and the detection branch is used for outputting the first target electric signal to the target equipment so that the target equipment can execute the target instruction based on the first target electric signal.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a detection circuit and a charging device. Background Art

[0002] Currently, the service life of the output cables of charging devices is often shortened during use, which creates a core wire safety risk. However, current users cannot obtain effective notification during use, so that the charging devices still have reliability risks. Utility Model Content

[0003] In order to solve the above technical problems, the following technical solutions are provided in the embodiments of the present application:

[0004] A first aspect of the present application provides a detection circuit, which mainly includes: a power supply circuit;

[0005] The detection branch includes a first end and a second end, the first end is connected to the power supply circuit, and the second end is used to connect to the target device; when the power supply circuit is powered on, the detection branch is used to output a first target electrical signal to the target device so that the target device can execute a target instruction based on the first target electrical signal.

[0006] In some modified implementations of the first aspect of the present application, it also includes: a voltage dividing module connected to the power supply circuit, the voltage dividing module includes a voltage dividing node, and the first end of the detection branch is connected to the voltage dividing node.

[0007] In some modified implementations of the first aspect of the present application, the voltage divider module includes a first voltage divider unit and a second voltage divider unit, and the voltage divider node is located between the first voltage divider unit and the second voltage divider unit; the first voltage divider unit includes an impedance adjustment unit, and the impedance adjustment unit includes a first impedance unit and a first switch unit; the first switch unit includes a third end, a fourth end and a first controlled end, the third end and the fourth end are respectively connected to the two ends of the first impedance unit, and the first controlled end is used to receive the second target electrical signal to realize the conduction or cutoff of the first switch unit.

[0008] In some modified implementations of the first aspect of the present application, the first voltage dividing unit includes a plurality of impedance adjusting units connected in series.

[0009] In some modified implementations of the first aspect of the present application, it also includes: a second switch unit, the second switch unit includes a fifth end, a sixth end and a second controlled end, the fifth end is connected to the power supply circuit, the sixth end is connected to the first end of the detection branch, and the second controlled end is used to receive a third target electrical signal to achieve conduction or cutoff of the second switch unit; a control module, the control module has a sampling input end and a control output end, the sampling input end is connected to the power supply circuit, and the control module is used to output the third target electrical signal according to the electrical signal of the power supply circuit.

[0010] In some modified implementations of the first aspect of the present application, when the second switch unit is turned on, the first target electrical signal is used to characterize that the detection circuit is in a first state, and in the first state, the voltage of the power supply circuit is a first value; when the second switch unit is turned off, the first target electrical signal is used to characterize that the detection circuit is in a second state, and in the second state, the voltage of the power supply circuit is a second value.

[0011] In some modified implementations of the first aspect of the present application, the control module includes a comparator, the comparator includes a first input terminal, a second input terminal and a comparator output terminal, the first input terminal and the second input terminal are sampling input terminals, and the control output terminal is the comparator output terminal; the detection circuit also includes a reference unit, the reference unit is used to connect the second input terminal so as to provide a reference signal for the comparator, and the control module is used to output a third target electrical signal based on the electrical signal of the first input terminal and the reference signal.

[0012] In some modified implementations of the first aspect of the present application, it also includes: a sampling unit, connected to the power supply circuit, the sampling unit is used to monitor the current signal passing through the target device, and output a fourth target electrical signal to the first input terminal of the comparator, the fourth target electrical signal representing the electrical signal in the power supply circuit.

[0013] The second aspect of the present application provides a charging device, which mainly includes a power supply circuit; a detection branch, including a first end and a second end, the first end is connected to the power supply circuit, and the second end is used to connect to a target device; when the power supply circuit is powered on, the detection branch is used to output a first target electrical signal to the target device, so that the target device can execute a target instruction based on the first target electrical signal.

[0014] In some modified implementations of the second aspect of the present application, the charging device includes: a charging cable, the charging cable includes a plurality of wires, the plurality of wires include a first portion of wires and a second portion of wires, the first portion of wires is connected to a power supply circuit, and the second portion of wires is connected to a detection branch;

[0015] The second portion of the conductive wire is at least partially located outside the first portion of the conductive wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0017] Figure 1 The connection structure diagram of the detection circuit of the present application is schematically shown;

[0018] Figure 2 The figure schematically shows the connection structure diagram of the voltage divider module in the detection circuit of the present application;

[0019] Figure 3 The schematic diagram of the connection structure of the voltage dividing unit in the voltage dividing module of the present application is schematically shown;

[0020] Figure 4 The schematic diagram of the connection structure of the control module in the detection circuit of the present application is schematically shown;

[0021] Figure 5 The circuit diagram of the detection circuit of the present application is schematically shown;

[0022] Figure 6 The circuit diagram of the voltage divider module in the detection circuit of the present application is schematically shown;

[0023] Figure 7 The circuit diagram of the control module in the detection circuit of the present application is schematically shown;

[0024] Figure 8 The schematic diagram of the structure of the single-strand arrangement of the detection branch of the present application is shown schematically;

[0025] Fig. 9 The schematic diagram of the structure of the multi-branch arrangement of the detection branches of the present application is shown schematically.

[0026] Reference numerals:

[0027] 1. Power supply device;

[0028] 101, positive line; 102, negative line; 103, detection branch;

[0029] 2. Target device;

[0030] 3. Voltage dividing module; 31. First voltage dividing unit; 32. Second voltage dividing unit; 301. First impedance unit; 302. First switch unit; 303. Second switch unit;

[0031] 4. control module; 41. comparator; 42. reference unit;

[0032] 5. Sampling unit. DETAILED DESCRIPTION

[0033] The exemplary embodiments disclosed in the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments disclosed in the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0034] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0035] At present, from the perspective of market development, the application of electronic devices is becoming more and more extensive, and charging devices have become an indispensable part of electronic devices in daily life. Especially with the popularization and rapid development of various electronic devices, charging cables, as the key link between power and devices, play a vital role in ensuring the normal operation and continuous power supply of devices. Currently, charging devices on the market are generally composed of power adapters, cables and charging plugs. The cables are usually composed of multiple conductive cores to transmit current to meet the charging needs of devices.

[0036] However, due to long-term use, improper pulling, aging and wear, the core wire inside the charging cable may break or break, which is the so-called "broken core" phenomenon. Users often find it difficult to detect such hidden faults during daily use, which may not only lead to reduced charging efficiency and abnormal heating of the device, but in severe cases may even cause irreversible damage to the device, and also bury safety risks.

[0037] Although the durability and safety of the existing charging devices have been fully considered in the design and manufacturing process, in actual applications, due to the lack of effective detection means, the potential reliability risk of cable core breakage has not received sufficient attention and proper solution. During use, users often only notice the problem when the device is charging abnormally or cannot be charged, and at this time the damage inside the cable may be quite serious. In view of this, the inventors of the present application have conducted in-depth research and practical exploration, and proposed a charging device and a detection circuit for detecting core breakage faults in response to the problem that the existing charging device cannot perceive and warn of cable core breakage faults in real time. The embodiment of the present application adds a detection circuit inside the charging device to monitor the on-off state of the core wire inside the cable in real time, and when a core breakage fault occurs, the electrical signal state of the detection branch in the detection circuit can be used to let the device know that a core breakage fault has occurred, so that the device can interact with the user and let the user know the cable core breakage situation, for example, to issue a warning to the user, etc., thereby greatly improving the reliability and safety of the charging device, extending the service life of the device, and effectively preventing potential safety accidents caused by cable core breakage.

[0038] Embodiment 1 of the present application proposes a detection circuit, which may include: a power supply circuit; a detection branch 103, including a first end and a second end, the first end is connected to the power supply circuit, and the second end is used to connect to the target device 2; when the power supply circuit is powered on, the detection branch 103 is used to output a first target electrical signal to the target device 2, so as to enable the target device 2 to execute a target instruction based on the first target electrical signal.

[0039] Specifically, refer to Figure 1 As shown, in the technical solution adopted by the present application, the power supply circuit is a component on the charging device 1 for outputting electric energy, wherein the power supply circuit can be composed of a positive line 101 and a negative line 102, which is used to connect the target device 2 and supply electric energy to the target device 2. The technical point of the present application is that a detection branch 103 can be set on the detection circuit, which can include a first end and a second end, so that the detection branch 103 can be connected between the power supply circuit and the target device 2 respectively. When in use, after reaching a target condition, the detection branch 103 can output a first target electrical signal to the target device 2 based on the current on the power supply circuit. In this embodiment, the first target electrical signal can be a signal generated by a change in electrical characteristics, or it can be a data signal or a pulse signal that can be output to the target device 2 through the detection branch 103. When the target device 2 detects that the detection branch 103 outputs the first target electrical signal, it executes the corresponding target instruction.

[0040] In one embodiment of the detection circuit of the present application, the detection branch 103 can be used as a loss component, which is used to cover the outside of the core wire in the power supply circuit. When the core wire of the detection branch 103 is lost and broken, it is determined that the detection branch 103 has reached the target condition and outputs the first target electrical signal to the target device 2. The first target electrical signal can be a voltage of a specific value or a processed signal that is continuously output to the target device 2 when the detection branch 103 is in a connected state with the power supply circuit and the target device 2. The first target electrical signal can also be a specific signal that is interrupted when the detection branch 103 is in a disconnected state with the power supply circuit and the target device 2. When the core wire of the detection branch 103 is broken, the connection between the detection branch 103 and the target device 2 is disconnected. When the target device 2 cannot detect the voltage or other output signal output by the detection branch 103, it can be determined that the core wire of the detection branch 103 has been disconnected due to loss. At this time, the target device 2 can interact with the user. The interaction can be a pop-up warning on the display module of the target device 2 or a periodic prompt sound, etc., to remind the user that the core wire of the detection branch 103 is damaged, so that the user can know the usage of the charging device in time.

[0041] Furthermore, in some embodiments, it further includes: a voltage dividing module 3 connected to the power supply circuit, the voltage dividing module 3 includes a voltage dividing node, and the first end of the detection branch 103 is connected to the voltage dividing node.

[0042] Specifically, refer to Figure 2 As shown, in the technical solution adopted in the present application, in one embodiment of the detection circuit of the present application, a voltage divider module 3 may be included in the detection circuit, which is connected to the power supply circuit. The voltage divider module 3 may be formed by a resistor component (R) or other components that can consume electrical energy to form a resistance value, etc., so that a specific voltage value that can be detected by the target device 2 is formed through the voltage divider module 3 on the detection circuit. The specific voltage value is a voltage signal on the voltage divider node, and the first end of the detection branch 103 is connected to the voltage divider node to obtain a voltage signal through the voltage divider module 3. Since in the present application, the second end of the detection branch 103 can be connected to the target device 2, when the target device 2 is charged by a charging device having the detection circuit, the voltage signal is continuously output to the target device 2 through the detection branch 103.

[0043] In this embodiment, the disappearance of the voltage signal on the detection branch 103 can be used as the first target electrical signal. When in use, the core wire of the detection branch 103 can cover the outside of the core wire of the power supply circuit, and the core wire of the detection branch 103 can be preferentially worn out during use. When the core wire of the detection branch 103 is completely broken due to wear and tear, the voltage divider module 3 is also disconnected from the target device 2, so that the voltage signal cannot be output to the target device 2. After the target device 2 detects that the voltage signal disappears, it determines that the core wire on the detection branch 103 has been completely worn out and broken, and uses the disappearance of the voltage on the detection branch 103 as the first target electrical signal. At this time, after receiving the first target electrical signal, the target device 2 interacts with the user to report the use of the charging device, so that the user can determine the time to replace the accessories of the charging device.

[0044] In this embodiment, the voltage divider module 3 is used to divide the voltage in the power supply circuit to obtain a voltage signal of a specific value, so that the detection circuit can characterize the core breakage through the change of the electrical characteristic signal, which effectively reduces the complexity of the detection circuit. The target signals to be detected in the target device 2 are all electrical characteristic signals, and the electronic equipment has the function of detecting electrical characteristic changes, so that the detection circuit in this application is more universal and practical.

[0045] Furthermore, in some embodiments, the voltage divider module 3 includes a first voltage divider unit 31 and a second voltage divider unit 32, and the voltage divider node is located between the first voltage divider unit 31 and the second voltage divider unit 32; the first voltage divider unit 31 includes an impedance adjustment unit, and the impedance adjustment unit includes a first impedance unit 301 and a first switch unit 302; the first switch unit 302 includes a third end, a fourth end and a first controlled end, the third end and the fourth end are respectively connected to the two ends of the first impedance unit 301, and the first controlled end is used to receive the second target electrical signal to realize the conduction or cutoff of the first switch unit 302.

[0046] Specifically, refer to Figure 3 and Figure 6 As shown, in the technical solution adopted by the present application, another embodiment of the detection circuit is also proposed. The power supply circuit and the detection branch 103 are the same as the above embodiment, so they are not described in detail. The voltage divider module 3 may include a plurality of resistor components (R), which can be divided into a first voltage divider unit 31 and a second voltage divider unit 32 in the voltage divider module 3, which can be connected to the positive line 101 and the negative line 102 of the power supply circuit respectively, so that the above-mentioned voltage divider node can be formed between the first voltage divider unit 31 and the second voltage divider unit 32. Specifically, the second voltage divider unit 32 can be composed of a resistor component (R) and can be connected to the negative line 102 of the power supply circuit. The first voltage-dividing unit 31 can be connected to the positive line 101 of the power supply circuit, which includes an impedance adjustment unit. The impedance adjustment unit includes a first impedance unit 301 composed of a plurality of resistor elements (R) and a first switch unit 302 corresponding to each first impedance unit 301. The current on the power supply circuit can be divided by the resistor elements (R) on each first impedance unit 301 and the second voltage-dividing unit 32, so as to form a voltage-dividing node with a specific voltage value between the first voltage-dividing unit 31 and the second voltage-dividing unit 32.

[0047] The first switch unit 302 may be a field effect transistor (Q), and without considering the space for arranging the detection circuit, the first switch unit 302 may also be an insulated gate bipolar transistor, a thyristor rectifier, a solid-state relay, or other electronic switch integrated circuits to achieve the conduction and cutoff of the current. The first switch unit 302 may have a third end, a fourth end, and a first controlled end, and the third end and the fourth end may be the input end and the output end of the field effect transistor (Q), respectively, and may be connected to the first impedance unit 301, and the first controlled end may be connected to the power supply device through a consumable core wire, so that the first switch unit 302 is in a conducting state through the electrical signal provided by the power supply device, and is used to receive the second target electrical signal that can be sensed by the first switch unit 302. In this embodiment, the detection branch 103 is used to output the voltage signal obtained by the voltage divider module 3 to the target device 2 as the first target electrical signal, and when the first switch unit 302 is in the on state, the voltage on the voltage divider node is formed by the voltage formed by the first voltage divider unit 31 through the resistor components (R) on the first switch unit 302 and the second voltage divider unit 32, so that the first target electrical signal on the detection branch 103 is the first value. When the core line connected to the first controlled end is lost, the electrical signal output to the first controlled end disappears. This phenomenon is characterized by outputting the second target electrical signal to the first switch unit 302, so that the first switch unit 302 changes from the on state to the off state. At this time, the first impedance unit 301 corresponding to the first voltage divider unit 31 takes effect because the first switch unit 302 is in the off state, so that the impedance characteristics of the first impedance unit 301 change, so that the voltage on the voltage divider node changes due to the changed electrical characteristics of the first voltage divider unit 31, and the first target electrical signal on the detection branch 103 also changes. The change of the first target electrical signal can be detected by the target device 2. It can be understood that when using the charging device with the detection circuit in this embodiment, the detection branch 103 is connected between the power supply circuit and the target device 2, the power supply circuit can be used to charge the target device 2, and the detection branch 103 continuously outputs the first target electrical signal to the target device 2 through the voltage divider module 3. When in use, the first switch unit 302 can be in the on state. When the core wire used for loss breaks due to loss, the first switch unit 302 changes from the on state to the off state. At this time, the impedance characteristic of the effective first impedance unit 301 is added to the voltage on the voltage divider node, so that the first target electrical signal output by the detection branch 103 to the target device 2 changes. The target device 2 can sense the change of the first target electrical signal in the detection circuit and interact with the user to report the current use status of the detection branch 103.

[0048] Furthermore, in some embodiments, the first voltage dividing unit 31 includes a plurality of impedance adjusting units connected in series.

[0049] Specifically, refer to Figure 6 As shown, in the technical solution adopted by the present application, there is another implementation method in the above-mentioned embodiment, and a plurality of impedance adjustment units connected in series can be arranged in the first voltage dividing unit 31. It can be understood that the first voltage dividing unit 31 is composed of a plurality of first impedance units 301 and first switch units 302 corresponding to each first impedance unit 301. Each impedance adjustment unit jointly forms a voltage dividing node between the second voltage dividing units 32, and the first end of the detection branch 103 is connected to the voltage dividing node, and the second end thereof is connected to the target device 2, and the third end and the fourth end of each first switch unit 302 are connected to the two ends of the corresponding first impedance unit 301, and the first controlled end thereof can be connected to the power supply device through a core wire that can be worn, so as to put the corresponding first switch unit 302 in a conducting state. The target device 2 still determines the degree of wear by detecting the change of the first target electrical signal output by the detection branch 103 to the target device 2, so it will not be described in detail. In this embodiment, the broken core loss level can be formed by the on-off change of the first switch unit 302 on several impedance adjustment units. It can be understood that the target device 2 determines the loss degree of the detection circuit by judging the change amount of the first target electrical signal. For example: ten groups of impedance adjustment units are set in the first voltage divider unit 31, which are composed of ten first impedance units 301 and ten first switch units 302, and the core wires in the detection branch 103 can be divided into eleven groups, one of which corresponds to the second voltage divider unit 32, and the remaining ten groups correspond to each impedance adjustment unit one by one. When the core wire that can be lost is broken, the voltage on the first voltage divider unit 31 can be changed in real time, causing the first target electrical signal output by the detection branch 103 to the target device 2 to change. The target device 2 detects the change amount of the first target electrical signal to diagnose the current loss level, and after obtaining the diagnosis result, it is notified through interaction with the user. The target device 2 can detect the voltage increase value formed after the impedance characteristics of each first impedance unit 301 take effect to diagnose the loss level of the current detection circuit.

[0050] In the embodiment of the detection circuit, one group of impedance adjustment units can also cancel the first switch unit 302, and the group of impedance adjustment units includes the first impedance unit 301, while the remaining groups of impedance adjustment units include the first impedance unit 301 and the first switch unit 302. When in use, the core wires of the detection branch 103 corresponding to the impedance adjustment unit with the first switch unit 302 are lost first before the core wires of the detection branch 103 corresponding to the impedance unit without the first switch unit 302. It can be understood that the core wires of the last loss level on the detection branch 103 use the disappearance of the voltage on the detection branch 103 as the first target electrical signal detectable by the target device 2, and the loss level before this is determined and diagnosed with the change amount of the voltage signal detectable by the target device 2 as the first target electrical signal.

[0051] Furthermore, in some embodiments, it also includes: a second switch unit 303, the second switch unit 303 includes a fifth end, a sixth end and a second controlled end, the fifth end is connected to the power supply circuit, the sixth end is connected to the first end of the detection branch 103, and the second controlled end is used to receive a third target electrical signal to realize the conduction or cutoff of the second switch unit 303; a control module 4, the control module 4 has a sampling input end and a control output end, the sampling input end is connected to the power supply circuit, and the control module 4 is used to output the third target electrical signal according to the electrical signal of the power supply circuit.

[0052] Specifically, refer to Figure 4 , Figure 5 and Figure 7 As shown, in the technical solution adopted by the present application, an implementation method of the detection circuit is also proposed, specifically, the fifth end of the second switch unit 303 is connected to the power supply circuit through the first voltage divider unit 31, the sixth end is connected to the detection branch 103 through the first voltage divider unit 31, and the second controlled end is connected to the control module 4, which is used to receive the third target electrical signal to control the second switch unit 303 to be turned on or off. The control module 4 has a sampling input end and a control output end, the sampling input end is connected to the power supply circuit, and the control output end can be connected to the second controlled end. In one embodiment, an impedance unit for cooperating with the second switch unit 303 can also be added to the first voltage divider unit 31. The impedance unit is located between the fifth end and the sixth end. When the voltage increase formed by the impedance characteristics of the impedance unit is on the first voltage divider unit 31, it can represent that the control module 4 detects the abnormality of the power supply circuit. When in use, when the control module 4 senses the state of the power supply circuit through the sampling input end, and controls the second switch unit 303 to be in the on state through the control output end. When in use, if the control module 4 determines that the output state of the power supply circuit is abnormal, the third target electrical signal is output to the second switch unit 303 through the control output terminal. The second switch unit 303 changes from the on state to the off state based on the third target electrical signal, so that the impedance characteristics of the impedance unit used to cooperate with the second switch unit 303 can be effective on the first voltage divider unit 31, thereby causing the first target electrical signal on the detection branch 103 to change. This change can be used to characterize the abnormality of the power supply circuit. After the target device 2 detects the abnormality of the power supply circuit in the first target electrical signal, it controls the power supply circuit to change its power supply power.

[0053] Further, in some embodiments, when the second switch unit 303 is turned on, the first target electrical signal is used to characterize that the detection circuit is in a first state, and in the first state, the voltage of the power supply circuit is a first value; when the second switch unit 303 is turned off, the first target electrical signal is used to characterize that the detection circuit is in a second state, and in the second state, the voltage of the power supply circuit is a second value.

[0054] Specifically, refer to Figure 7 As shown, in the embodiment adopted by the present application, the control module 4 specifically records the power on the power supply circuit and the time to maintain the current power, and continuously outputs a stable voltage signal to the second switch unit 303 through the control module 4 to maintain the second switch unit 303 in the on state. At the same time, the on-off state of the second switch unit 303 can affect the impedance characteristics on the first voltage divider unit 31, so that the first target electrical signal changes. If the impedance unit used to cooperate with the second switch unit 303 does not cause the impedance characteristics on the first voltage divider unit 31 to change, it can be characterized that the detection circuit is in the first state, and the target device 2 determines whether the detection branch 103 is in the first state through detection, and after determination, controls the power supply circuit to adjust its output voltage to the first value, wherein the first state can be characterized that the temperature of the charging device 1 is normal, and the voltage supplied by the current power supply circuit to the target device 2 is maintained at the first value. On the contrary, after the control module 4 senses that the power supply circuit maintains the first value of the power supply voltage for a set time, the control module 4 outputs a voltage signal to the second switch unit 303 as the third target electrical signal, which is used to control the second switch unit 303 to change from the on state to the off state. At this time, the first impedance unit 301 used to cooperate with the second switch unit 303 changes the impedance characteristics on the first voltage divider unit 31, thereby causing the first target electrical signal to change. This change can be used to indicate that the detection circuit is in the second state, and the target device 2 determines that the detection branch 103 is in the second state by detecting the first target electrical signal. The second state can indicate that the output power of the power supply circuit is based on the target device 2 being in a relatively abnormal state, which can be an adverse reaction such as temperature rise, and then the power supply circuit is controlled to reduce its output voltage, specifically, the current power supply circuit supplies the target device 2 with a voltage lowered to the second value. After the power supply circuit reduces its power supply, in order to maintain the normal operation of the target device 2, the backup power supply of the target device 2 can be started at the same time, so that the backup power supply and the charging device jointly supply the target device 2 with electrical energy sufficient to support the normal or high-performance operation of the target device 2.

[0055] This application can effectively manage the output power and temperature monitoring of the power supply device and dynamically adjust the power supply power. Under normal operating conditions, the target device can detect the voltage signal output by the branch in real time through the voltage divider module to reflect the working status of the power supply device.

[0056] For example, when the output power of the power supply device reaches the range of 80% to 90%, due to factors such as power conversion efficiency, its surface temperature may rise rapidly. After about half an hour (0.5 hours), this temperature rise will become more obvious and can be felt by the human body. At this time, the impedance adjustment unit configured on the voltage divider module will automatically start the control mechanism. Specifically, when it is detected that the temperature of the adapter rises to the set threshold, the impedance adjustment unit will intervene in the first target electrical signal generated by the voltage divider module, and convey the temperature abnormality information by increasing the voltage of the electrical signal to a specific preset value. This change can be accurately identified by the target device and processed accordingly. The target device that receives this special electrical signal will execute an optimized charging strategy such as the following: First, a cycle control is performed with a cycle of 1 hour. After receiving the electrical signal and starting the timing for 0.5 hours, the power supply device will actively reduce its own power supply to maintain it below 80%, and at the same time enable the backup power supply stored inside the target device to supplement the power supply to achieve the phenomenon of slowing down the temperature rise of the power supply device; then, after maintaining this mode for 0.5 hours, the target device will turn off the backup power supply and restore the power supply of the power supply device to the normal level, ensuring that the device can work and charge stably and efficiently within the safe temperature range. This dynamic adjustment method can not only ensure the charging efficiency of the equipment, but also effectively avoid safety hazards caused by overheating.

[0057] Furthermore, in some embodiments, the control module 4 includes a comparator 41, the comparator 41 includes a first input terminal, a second input terminal and a comparator 41 output terminal, the first input terminal and the second input terminal are sampling input terminals, and the control output terminal is the comparator 41 output terminal; the detection circuit also includes a reference unit 42, the reference unit 42 is used to connect the second input terminal so as to provide a reference signal (Ref) for the comparator 41, and the control module 4 is used to output a third target electrical signal based on the electrical signal of the first input terminal and the reference signal (Ref).

[0058] Specifically, refer to Figure 7 As shown, in the technical solution adopted by the present application, the control module 4 includes a comparator 41, which has a sampling input terminal composed of a first input terminal and a second input terminal and a control output terminal composed of an output terminal of the comparator 41. The first input terminal can be connected to the power supply circuit and can be used to sense the power supply voltage on the power supply circuit. The detection circuit also includes a reference unit 42 configured on the comparator 41, in which voltage reference data is stored and connected to the second output terminal to provide a reference signal (Ref) to the comparator 41, so that the control module 4 can obtain the electrical signal of the power supply circuit with reference to the first input terminal and compare it with the reference signal (Ref) to determine whether to output the third target electrical signal to the second switch unit 303, thereby realizing the function of detecting and adjusting the power supply power on the power supply circuit.

[0059] Furthermore, in some embodiments, it also includes: a sampling unit 5, connected to the power supply circuit, the sampling unit 5 is used to monitor the current signal passing through the target device 2, and output a fourth target electrical signal to the first input terminal of the comparator 41, the fourth target electrical signal represents the electrical signal in the power supply circuit.

[0060] Specifically, refer to Figure 7 As shown, in the embodiment of the detection circuit of the present application, a sampling unit 5 is also included, which is configured on the power supply circuit, and is used to detect the current signal on the power supply circuit. That is, the current on the power supply circuit is detected by the sampling unit 5, and the current is subjected to voltage reduction processing to form a fourth target electrical signal that can be sensed by the comparator 41, which is used to characterize the power supply power of the electrical signal in the power supply circuit. The electrical signal provided by the sampling unit 5 can be received by the comparator 41. The above technical solution is adopted to enable the comparator 41 to compare the power information on the power supply circuit with the reference signal (Ref) in the reference unit 42, so that the control module 4 can control the second switch unit 303 to implement the on-off change with reference to the comparison result, and the first target electrical signal that can be detected by the target device 2 on the detection circuit contains the abnormal information representing the current power supply circuit and the loss level information of the core wire in the detection branch 103. In this embodiment, the sampling unit 5 can be a sampling resistor (Rsense) configured in the negative line 102 of the power supply circuit.

[0061] Referring to the accompanying drawings, a charging device is also proposed in an embodiment of the present application, which mainly includes: a power supply circuit; a detection branch 103, including a first end and a second end, the first end is connected to the power supply circuit, and the second end is used to connect to the target device 2; when the power supply circuit is powered on, the detection branch 103 is used to output a first target electrical signal to the target device 2, so as to enable the target device 2 to execute a target instruction based on the first target electrical signal.

[0062] Specifically, in the technical solution adopted in the present application, the charging device may include the detection circuit protected in the above-mentioned embodiment, and the detection circuit specifically includes a power supply circuit for supplying power to the target device 2, a detection branch 103 and a voltage divider module 3. For details, please refer to the above-mentioned embodiment, so it will not be described in detail here.

[0063] Further, see Figures 1 to 7 As shown, in some embodiments, the basic components of the charging device include: a charging cable, the charging cable includes a plurality of wires, the plurality of wires include a first portion of wires and a second portion of wires, the first portion of wires is connected to the power supply circuit, and the second portion of wires is connected to the detection branch 103;

[0064] The second portion of the conductive wire is at least partially located outside the first portion of the conductive wire.

[0065] Specifically, in the technical solution adopted by the present application, the charging device in the embodiment of the present application may include a charging cable composed of a plurality of wires, and the plurality of wires may be divided into a first part of wires and a second part of wires, the first part of wires is used to form a power supply circuit, and the second part of wires is used to form a detection branch 103 in the detection circuit. In the embodiment of the present application, the target wire segment of the second part of wires may be arranged outside the first part of wires, that is, the detection branch 103 can be made to break with loss first compared to the power supply circuit, so as to achieve the purpose of performing core break detection on the charging cable.

[0066] In one embodiment, referring to Figure 8 As shown, when the representation form of the first target electrical signal is that the voltage on the detection branch 103 disappears, the second part of the wire can be covered on the outside of the first part of the wire in a single strand form. When the second part of the wire is completely broken due to loss, it is determined that the condition for the target device 2 to detect the degree of loss has been met.

[0067] In another embodiment, referring to Fig. 9 As shown, when the representation form of the first target electrical signal is that the voltage on the detection branch 103 changes, multiple strands can be used to cover the outside of the first part of the wire. A layer of loss components can be formed on the outside of the first part of the wire, or multiple layers of loss components can be formed, thereby dividing the detection circuit into several loss levels.

[0068] It should be noted that in the description of this specification, the terms "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application; the terms "connect", "install", "fixed", etc. should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A detection circuit, characterized in that: include: Power supply circuit; A detection branch, comprising a first end and a second end, wherein the first end is connected to the power supply circuit, and the second end is used to connect to a target device; When the power supply circuit is powered on, the detection branch is used to output a first target electrical signal to the target device, so that the target device can execute a target instruction based on the first target electrical signal.

2. The detection circuit according to claim 1, characterized in that: Also includes: The voltage dividing module is connected to the power supply circuit. The voltage dividing module includes a voltage dividing node. The first end of the detection branch is connected to the voltage dividing node.

3. The detection circuit according to claim 2, characterized in that: The voltage division module comprises a first voltage division unit and a second voltage division unit, and the voltage division node is located between the first voltage division unit and the second voltage division unit; The first voltage dividing unit includes an impedance adjusting unit, and the impedance adjusting unit includes a first impedance unit and a first switch unit; The first switch unit includes a third end, a fourth end and a first controlled end, the third end and the fourth end are respectively connected to two ends of the first impedance unit, and the first controlled end is used to receive a second target electrical signal to realize the conduction or cutoff of the first switch unit.

4. The detection circuit according to claim 3, characterized in that: The first voltage dividing unit includes a plurality of impedance adjusting units connected in series.

5. The detection circuit according to any one of claims 2 to 4, characterized in that: Also includes: a second switch unit, the second switch unit comprising a fifth end, a sixth end and a second controlled end, the fifth end being connected to the power supply circuit, the sixth end being connected to the first end of the detection branch, and the second controlled end being used to receive a third target electrical signal to realize the conduction or cutoff of the second switch unit; A control module, wherein the control module has a sampling input end and a control output end, wherein the sampling input end is connected to the power supply circuit, and the control module is used to output a third target electrical signal according to the electrical signal of the power supply circuit.

6. The detection circuit according to claim 5, characterized in that: When the second switch unit is turned on, the first target electrical signal is used to indicate that the detection circuit is in a first state, and in the first state, the voltage of the power supply circuit is a first value; When the second switch unit is turned off, the first target electrical signal is used to indicate that the detection circuit is in a second state. In the second state, the voltage of the power supply circuit is a second value.

7. The detection circuit according to claim 5, characterized in that: The control module includes a comparator, the comparator includes a first input terminal, a second input terminal and a comparator output terminal, the first input terminal and the second input terminal are the sampling input terminals, and the control output terminal is the comparator output terminal; The detection circuit also includes a reference unit, which is used to connect the second input terminal to provide a reference signal for the comparator. The control module is used to output the third target electrical signal according to the electrical signal of the first input terminal and the reference signal.

8. The detection circuit according to claim 7, characterized in that: Also includes: A sampling unit is connected in the power supply circuit, and is used to monitor the current signal passing through the target device and output a fourth target electrical signal to the first input terminal of the comparator, wherein the fourth target electrical signal represents the electrical signal in the power supply circuit.

9. A charging device, characterized in that: include: Power supply circuit; A detection branch, comprising a first end and a second end, wherein the first end is connected to the power supply circuit, and the second end is used to connect to a target device; When the power supply circuit is powered on, the detection branch is used to output a first target electrical signal to the target device, so that the target device can execute a target instruction based on the first target electrical signal.

10. The charging device according to claim 9, characterized in that: include: A charging cable, the charging cable comprising a plurality of wires, the plurality of wires comprising a first portion of wires and a second portion of wires, the first portion of wires being connected to the power supply circuit, and the second portion of wires being connected to the detection branch; The second portion of the conductive wire is at least partially located outside the first portion of the conductive wire.

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