Charger and charging system with same

Abstract

The charger comprises a power plug, a charging plug and a temperature control branch, the power plug is used for being detachably connected with a power supply, the charging plug is used for being detachably connected with to-be-charged equipment, and the charging plug is connected with the power plug through a charging cable; the input end of the temperature control branch is connected with the charging cable, the temperature control branch comprises a temperature control unit and a first power supply unit connected with the temperature control unit in series, and the potential difference between the two ends of the first power supply unit is larger than a preset threshold value. The charger is subjected to over-temperature protection through the temperature control unit, so that the current-carrying requirement of the temperature control unit is reduced, and the service life of the temperature control unit is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of charging technology, and in particular to a charger and a charging system having the same. Background Art

[0002] If the current of the charger is too large during charging, it may burn out the charger. In order to protect the charger and extend its service life, the related technology sets a temperature switch on the charging cable. When the temperature exceeds the threshold, the temperature switch is disconnected to protect the charger.

[0003] However, since the current of the charging cable is relatively large, setting the temperature switch on the charging cable requires a higher current carrying capacity of the temperature switch and the service life of the temperature switch is relatively short. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a charger, which protects the charger from over-temperature through a temperature control unit, thereby reducing the current carrying requirement of the temperature control unit and extending the service life of the temperature control unit.

[0005] The present invention also aims to provide a charging system having the charger.

[0006] According to an embodiment of the first aspect of the present invention, a charger includes a power plug, a charging plug and a temperature control branch, the power plug is used to be detachably connected to a power supply, the charging plug is used to be detachably connected to a device to be charged, the charging plug and the power plug are connected through a charging cable, the input end of the temperature control branch is connected to the charging cable, the temperature control branch includes a temperature control unit and a first power supply unit connected in series with the temperature control unit, and the potential difference between the two ends of the first power supply unit is greater than a preset threshold.

[0007] According to the charger of the present invention, a temperature control branch is provided with an input end connected to a charging cable, and a temperature control unit and a first power supply unit with a potential difference between both ends being greater than a preset threshold are connected in series on the temperature control branch, so that the current on the temperature control branch is small. The temperature control unit is provided on the temperature control branch, which reduces the current carrying requirement of the temperature control unit and prolongs the service life of the temperature control unit.

[0008] According to some embodiments of the present invention, the charger further includes a function box, the charging cable passes through the function box, and the function box includes a first power supply unit.

[0009] According to some embodiments of the present invention, the function box also includes an electronically controlled switch, which includes a control end and a switch assembly. The switch assembly is arranged on the charging cable, the input end of the temperature control branch is connected to the charging cable between the power plug and the switch assembly, and the output end is connected to the control end.

[0010] According to some embodiments of the present invention, a temperature control unit is provided at a power plug; the temperature control unit is used to turn on the temperature control branch when the temperature of the power plug is lower than a temperature threshold so that the control end is powered on; the control end is used to control the switch component to be closed in the powered-on state so that the charging cable is powered on; the temperature control unit is also used to disconnect the temperature control branch when the temperature of the power plug is higher than the temperature threshold so that the control end is powered off; the control end is also used to control the switch component to be opened in the powered-off state so that the charging cable is powered off.

[0011] According to some embodiments of the present invention, the input end of the temperature control branch is connected to the charging cable in the function box.

[0012] According to some embodiments of the present invention, the function box also includes a control module, one end of the control module is connected to the input end of the first power supply unit, and the other end is connected to the charging plug, the control module is used to determine the conduction state of the temperature control unit according to the voltage at the input end of the first power supply unit, and adjust the charging current output by the charging cable according to the conduction state of the temperature control unit.

[0013] According to some embodiments of the present invention, the control module includes a processing unit and a first voltage detection circuit, one end of the first voltage detection circuit is connected to the input end of the first power supply unit, and the other end is connected to the processing unit, the first voltage detection circuit is used to detect the voltage at the input end of the first power supply unit and send the voltage at the input end of the first power supply unit to the processing unit.

[0014] According to some embodiments of the present invention, the control module also includes a current detection circuit, one end of the current detection circuit is connected to the charging cable, and the other end is connected to the processing unit, and the current detection circuit is used to detect the charging current output by the charging cable and send the charging current output to the processing unit.

[0015] According to some embodiments of the present invention, the control module also includes a regulation circuit, one end of the regulation circuit is connected to the processing unit, and the other end is connected to the charging plug; the regulation circuit is used to adjust the duty cycle when the voltage at the input end of the first power supply unit is 0, so as to adjust the charging current output by the charging cable.

[0016] According to some embodiments of the present invention, a first switch is provided on the line between the control circuit and the charging plug, and the first switch is used to connect or disconnect the line between the control circuit and the charging plug.

[0017] According to some embodiments of the present invention, the output end of the first power supply unit is connected to the control module to supply power to the processing unit, and a reverse current isolation element is provided between the output end of the first power supply unit and the processing unit.

[0018] According to some embodiments of the present invention, a second switch is provided on the line between the first power supply unit and the control end of the electric control switch, and the second switch is used to power on or off the charging cable.

[0019] According to some embodiments of the present invention, the charger further includes a second power supply unit, one end of the second power supply unit is connected to the charging cable, and the other end of the second power supply unit is connected to the control module.

[0020] According to an embodiment of the second aspect of the present invention, a charging system comprises a power supply, the charger in the above embodiment, and a device to be charged, wherein the power plug is detachably electrically connected to the power supply, and the charging plug is detachably electrically connected to the device to be charged.

[0021] The charging system according to the embodiment of the present invention ensures stable and normal operation of the charging system by adopting the charger of the above embodiment.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a circuit diagram of a charger according to an embodiment of the present invention;

[0024] Figure 2 is a circuit diagram of a charging system according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] Charger 100,

[0027] Power plug 10, charging plug 20, charging cable 30,

[0028] Temperature control branch 40, temperature control unit 41, first power supply unit 42,

[0029] Function box 50, electric control switch 51, control terminal 511, switch assembly 512, control module 52, processing unit 521, first voltage detection circuit 522, current detection circuit 523, regulation circuit 524, first switch 53, second switch 54, second voltage detection circuit 55, third voltage detection circuit 56, second power supply unit 57, leakage detection circuit 58, display 59,

[0030] A charging system 1000 , a power supply 200 , and a device to be charged 300 . DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0033] The charger 100 and the charging system 1000 having the same according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0034] Reference Figure 1 The charger 100 according to the embodiment of the first aspect of the present invention includes a power plug 10, a charging plug 20 and a temperature control branch 40, the power plug 10 is used to be detachably connected to the power supply 200, the charging plug 20 is used to be detachably connected to the device to be charged 300, the charging plug 20 is connected to the power plug 10 through a charging cable 30, the input end of the temperature control branch 40 is connected to the charging cable 30, the temperature control branch 40 includes a temperature control unit 41 and a first power supply unit 42 connected in series with the temperature control unit 41, and the potential difference between the two ends of the first power supply unit 42 is greater than a preset threshold.

[0035] Specifically, refer to Figure 1 The charger 100 in the embodiment of the present invention includes a power plug 10, which is detachably connected to a power supply 200 to power on or off the power supply 200. The power supply 200 may be a mains power supply, etc. The charging plug 20 is detachably connected to a device to be charged 300 to charge the device to be charged 300 when powered on. The device to be charged 300 may be an electric vehicle, etc. The charging plug 20 is connected to the power plug 10 through a charging cable 30 to conduct the charging plug 20 and the power plug 10. The charging cable 30 includes at least a phase line and a ground line. For example, the charging cable 30 may include two phase lines and a ground line, or a phase line, a neutral line, and a ground line.

[0036] The charger 100 also includes a temperature control branch 40, which is used to control the conduction or shutdown of the charging cable 30 according to the temperature of the target component. The input end of the temperature control branch 40 is connected to the charging cable 30, so that the voltage at the input end of the temperature control branch 40 is the same as the voltage at the end of the charging cable 30 connected thereto. The temperature control branch 40 includes a temperature control unit 41 and a first power supply unit 42 connected in series with the temperature control unit 41, that is, the temperature control unit 41 and the first power supply unit 42 are connected in series on the temperature control branch 40, and the potential difference between the two ends of the first power supply unit 42 is greater than the preset threshold value, so that the current on the temperature control branch 40 is small, and the temperature control unit 41 is set on the temperature control branch 40, which reduces the current carrying requirement of the temperature control unit 41 and prolongs the service life of the temperature control unit 41.

[0037] It should be noted that the preset threshold value of the potential difference between the two ends of the first power supply unit 42 can be set according to the maximum current carrying capacity of the temperature control unit 41 to extend the service life of the temperature control unit 41 .

[0038] Therefore, refer to Figure 1 According to the charger 100 of the present invention, a temperature control branch 40 is provided with an input end connected to the charging cable 30, and a temperature control unit 41 and a first power supply unit 42 with a potential difference between both ends greater than a preset threshold are connected in series on the temperature control branch 40, so that the current on the temperature control branch 40 is small. The temperature control unit 41 is provided on the temperature control branch 40, which reduces the current carrying requirement of the temperature control unit 41 and prolongs the service life of the temperature control unit 41.

[0039] In some embodiments, the temperature unit may be a temperature switch, or other components capable of switching the temperature control branch 40 on and off according to temperature changes.

[0040] In some embodiments of the present invention, reference Figure 1 The charger 100 further includes a function box 50 , the charging cable 30 passes through the function box 50 , and the function box 50 includes a first power supply unit 42 .

[0041] By providing the function box 50, it is convenient to provide the first power supply unit 42. Of course, the function box 50 can also be used to provide other components.

[0042] In some embodiments, the function box 50 is disposed between the power plug 10 and the charging plug 20, or can be disposed on the same side of the power plug 10 and the charging plug 20. For example, it can be disposed on the upper side, lower side, left side or right side of the power plug 10 and the charging plug 20.

[0043] In some embodiments of the present invention, reference Figure 1The function box 50 also includes an electronically controlled switch 51, which includes a control terminal 511 and a switch assembly 512. The switch assembly 512 is arranged on the charging cable 30. The input end of the temperature control branch 40 is connected to the charging cable 30 between the power plug 10 and the switch assembly 512, and the output end is connected to the control terminal 511.

[0044] The electric control switch 51 is used to control the on and off of the charging cable 30. The control end 511 is used to control the opening and closing of the switch assembly 512. The switch assembly 512 is arranged on the charging cable 30 and is used to conduct or disconnect the charging cable 30. When the switch assembly 512 is opened, the charging cable 30 is disconnected. When the switch assembly 512 is closed, the charging cable 30 is conducted and energized. The input end of the temperature control branch 40 is connected to the charging cable 30 between the power plug 10 and the switch assembly 512. When the power plug 10 is connected to the power supply 200, the temperature control branch 40 is energized, and the output end is connected to the control end 511. In this way, the control end 511 is energized and the control switch assembly 512 is closed. When the temperature control unit 41 on the temperature control branch 40 is disconnected, the temperature control branch 40 is de-energized, the control end 511 is de-energized, and the control switch assembly 512 is disconnected.

[0045] By setting the electric control switch 51, the on and off of the temperature control unit 41 can control the on and off of the charging cable 30, and there is no need for the temperature control unit 41 to interact with the control module 52 for signals. In this way, even if the control module 52 fails, it will not affect the over-temperature protection of the charging cable 30 by the temperature control unit 41.

[0046] In some embodiments, the control terminal 511 may be a coil, and the electric control switch 51 may be a relay, etc. The phase line and the neutral line may be provided with switch components 512 respectively, and the control terminal 511 may be one or two.

[0047] In some embodiments of the present invention, reference Figure 1 The temperature control unit 41 is provided at the power plug 10; the temperature control unit 41 is also used to turn on the temperature control branch 40 when the temperature of the power plug 10 is lower than the temperature threshold, so that the control end 511 is powered on; the control end 511 is also used to control the switch component 512 to be closed in the powered-on state, so that the charging cable 30 is powered on; the temperature control unit 41 is used to disconnect the temperature control branch 40 when the temperature of the power plug 10 is higher than the temperature threshold, so that the control end 511 is powered off; the control end 511 is used to control the switch component 512 to be opened in the powered-off state, so that the charging cable 30 is powered off.

[0048] The temperature control unit 41 is disposed on the power plug 10 and can control the on and off of the charging cable 30 according to the temperature of the power plug 10. Of course, the present application is not limited thereto, and the temperature control unit 41 can also be disposed on the function box 50 or the charging plug 20.

[0049] When the temperature of the power plug 10 is lower than the temperature threshold, the power plug 10 will not be burned out and can work normally. At this time, the temperature control unit 41 is in a closed state, and the temperature control branch 40 is turned on. In this way, the temperature control branch 40 is powered on, and the control end 511 is powered on. The control end 511 can control the switch component 512 to be closed in the powered state, so that the charging cable 30 can be powered on and can charge normally.

[0050] When the temperature of the power plug 10 is greater than the temperature threshold, the power plug 10 is at risk of burning out. In order to protect the power plug 10 and extend the service life of the power plug 10, the temperature control unit 41 is disconnected, thereby disconnecting the temperature control branch 40. In this way, the temperature control branch 40 is powered off, so that the control end 511 is powered off. In the power-off state, the control end 511 can control the switch component 512 to open, so that the charging cable 30 can be powered off and charging can be stopped.

[0051] In some embodiments of the present invention, reference Figure 1 The input end of the temperature control branch 40 is connected to the charging cable 30 in the function box 50 .

[0052] The input end of the temperature control branch 40 is connected to the charging cable 30 in the function box 50 for easy wiring. Of course, the present application is not limited thereto, and the input end of the temperature control branch 40 can also be connected to the charging cable 30 of the power plug 10.

[0053] In some embodiments of the present invention, reference Figure 1 The function box 50 also includes a control module 52, one end of the control module 52 is connected to the input end of the first power supply unit 42, and the other end is connected to the charging plug 20. The control module 52 is used to determine the conduction state of the temperature control unit 41 according to the voltage at the input end of the first power supply unit 42, and adjust the charging current output by the charging cable 30 according to the conduction state of the temperature control unit 41.

[0054] One end of the control module 52 is connected to the input end of the first power supply unit 42 so as to obtain the voltage at the input end of the first power supply unit 42. The other end is connected to the charging plug 20 so as to send a control signal to the charging plug 20. The control module 52 can determine the conduction state of the temperature control unit 41 according to the voltage at the input end of the first power supply unit 42. For example, when the voltage at the input end of the first power supply unit 42 is 0, the temperature control unit 41 is in the disconnected state. When the voltage at the input end of the first power supply unit 42 is 220V, the temperature control unit 41 is in the on state. The charging current output by the charging cable 30 is adjusted according to the on state of the temperature control unit 41. That is, when the temperature control unit 41 is disconnected, it means that the current of the charging cable 30 is too large. The control module 52 reduces the charging current output by the charging cable 30 to reduce the temperature of the power plug 10. When the temperature control unit 41 is on, it means that the current of the charging cable 30 is normal. The charging current output by the charging cable 30 can remain unchanged.

[0055] In some embodiments of the present invention, reference Figure 1 The control module 52 includes a processing unit 521 and a first voltage detection circuit 522. One end of the first voltage detection circuit 522 is connected to the input end of the first power supply unit 42, and the other end is connected to the processing unit 521. The first voltage detection circuit 522 is used to detect the voltage at the input end of the first power supply unit 42 and send the voltage at the input end of the first power supply unit 42 to the processing unit 521.

[0056] By providing a first voltage detection circuit 522 and connecting one end of the first voltage detection circuit 522 to the input end of the first power supply unit 42, the first voltage detection circuit 522 can detect the voltage at the input end of the first power supply unit 42. The other end is connected to the processing unit 521, so that the detected voltage at the input end of the first power supply unit 42 is sent to the processing unit 521, so that the processing unit 521 can determine the conduction state of the temperature control unit 41 according to the voltage at the input end of the first power supply unit 42.

[0057] In some embodiments, a voltage detection element may be further provided at the input end of the first power supply unit 42 , and the voltage detection element interacts with the processing unit 521 via electrical signals.

[0058] In some embodiments of the present invention, reference Figure 1 The control module 52 also includes a current detection circuit 523, one end of the current detection circuit 523 is connected to the charging cable 30, and the other end is connected to the processing unit 521. The current detection circuit 523 is used to detect the charging current output by the charging cable 30 and send the charging current output to the processing unit 521.

[0059] By setting a current detection circuit 523, and connecting one end of the current detection circuit 523 to the charging cable 30, the current detection circuit 523 can detect the charging current output by the charging cable 30, and the other end is connected to the processing unit 521, so that the detected charging current output by the charging cable 30 is sent to the processing unit 521, and the processing unit 521 can obtain the charging current output by the charging cable 30 in real time. When the temperature control unit 41 is disconnected, the charging current output by the charging cable 30 can be adjusted according to the charging current output by the charging cable 30 when the temperature control unit 41 is disconnected.

[0060] In some embodiments, a current detection element may be further provided on the charging cable 30 , and the current detection element and the processing unit 521 may interact with each other via electrical signals.

[0061] In some embodiments of the present invention, reference Figure 1 The control module 52 also includes a control circuit 524, one end of the control circuit 524 is connected to the processing unit 521, and the other end is connected to the charging plug 20; the control circuit 524 is used to adjust the duty cycle when the voltage at the input end of the first power supply unit 42 is 0, so as to adjust the charging current output by the charging cable 30.

[0062] The control circuit 524 is provided to control the output charging current of the charging cable 30. One end of the control circuit 524 is connected to the processing unit 521, so that when the processing unit 521 obtains a signal that the temperature control unit 41 is disconnected, that is, the voltage at the input end of the first power supply unit 42 is 0, the charging current output on the charging cable 30 is adjusted. The other end is connected to the charging plug 20, and the control circuit 524 reduces the duty cycle according to the duty cycle corresponding to the charging current output on the charging cable 30 when the voltage at the input end of the first power supply unit 42 is 0, and sends the reduced duty cycle signal to the charging device 300 through the interaction between the charging plug 20 and the charging device 300, so that the charging device 300 adjusts the charging current, thereby adjusting the charging current output on the charging cable 30.

[0063] In some embodiments of the present invention, reference Figure 1 A first switch 53 is provided on the line between the control circuit 524 and the charging plug 20 , and the first switch 53 is used to turn on or off the line between the control circuit 524 and the charging plug 20 .

[0064] By setting the first switch 53, the conduction or disconnection of the line between the control circuit 524 and the charging plug 20 can be controlled. Preferably, the first switch 53 is disconnected when the temperature control unit 41 is disconnected, so that the device to be charged 300 cannot detect the voltage signal and the CP signal, and can be defaulted to the power-off state without reporting a fault. In this way, the charger 100 can be compatible with more models of devices to be charged 300, because some devices to be charged 300 will sleep for a certain period of time when the voltage signal cannot be detected, and the CP signal needs to rise to wake up.

[0065] It is understandable that the opening and closing of the first switch 53 can be controlled by the processing unit 521 .

[0066] In some embodiments of the present invention, reference Figure 1 The output end of the first power supply unit 42 is connected to the control module 52 to supply power to the processing unit 521 , and a reverse current isolation element is provided between the output end of the first power supply unit 42 and the processing unit 521 .

[0067] The output end of the first power supply unit 42 is connected to the control module 52, specifically, the output end of the first power supply unit 42 is connected to the processing unit 521, so that when other power supply units fail, the processing unit 521 is temporarily powered, ensuring the normal operation of the processing unit 521. A reverse current isolator is provided between the output end of the first power supply unit 42 and the processing unit 521, so that other power supply units are prevented from supplying power to the output end of the first power supply unit 42 through the circuit, and then supplying power to the electric control switch 51.

[0068] In some embodiments of the present invention, reference Figure 1 A second switch 54 is provided on the line between the first power supply unit 42 and the control end 511 of the electric control switch 51 , and the second switch 54 is used to power on or off the charging cable 30 .

[0069] By providing a second switch 54 on the line between the first power supply unit 42 and the control end 511 of the electric control switch 51, the opening and closing of the electric control switch 51 can be controlled. Preferably, the second switch 54 is in a normally open state, and after the processing unit 521 obtains that the power plug 10 is powered on with the power supply 200 and the charging plug 20 is connected to the device to be charged 300, the second switch 54 can be controlled to be closed to ensure the safety of the charger 100.

[0070] The second switch 54 may also be a switch circuit, for example, a transistor, an operational amplifier comparator, etc.

[0071] In some embodiments of the present invention, reference Figure 1 The charger 100 further includes a second power supply unit 57 , one end of which is connected to the charging cable 30 , and the other end of which is connected to the control module 52 .

[0072] Specifically, the second power supply unit 57 is arranged in the function box 50, one end of the second power supply unit 57 is connected to the charging cable 30, further, one end of the second power supply unit 57 is connected to the charging cable 30 between the power plug 10 and the electric control switch 51, and the other end is connected to the processing unit 521 to supply power to the processing unit 521.

[0073] In some embodiments, the function box 50 also includes a second voltage detection circuit 55, which is respectively connected to the phase line and the neutral line, and is connected to the processing unit 521, so that the second voltage detection circuit 55 can detect whether the charging cable 30 is powered on, and send the detection result to the processing unit 521, so that the processing unit 521 controls the opening and closing of the second switch 54 according to the signal and the connection signal between the charging plug 20 and the device to be charged 300.

[0074] In some embodiments, the function box 50 also includes a third voltage detection circuit 56, one end of the third voltage detection circuit 56 is connected to the output end of the first power supply unit 42, and the other end is connected to the processing unit 521. The third voltage detection circuit 56 can obtain the voltage at the output end of the first power supply unit 42 and determine whether the first power supply unit 42 fails through the processing unit 521.

[0075] In some embodiments, the function box 50 also includes a leakage detection circuit 58, one end of the leakage detection circuit 58 is connected to the charging cable 30, and the other end is connected to the processing unit 521. The leakage detection circuit 58 can detect whether the charging cable 30 is leaking and send the result to the processing unit 521.

[0076] In some embodiments, the function box 50 further includes a display 59 , which is connected to the processing unit 521 . The fault signal acquired by the processing unit 521 , such as a leakage signal, can be displayed through the display 59 .

[0077] According to the charging system 1000 of the second aspect of the present invention, Figure 2 , including a power supply 200, the charger 100 in the above embodiment and a device to be charged 300, the power plug 10 is detachably electrically connected to the power supply 200, and the charging plug 20 is detachably electrically connected to the device to be charged 300.

[0078] The charging system 1000 according to the embodiment of the present invention ensures stable and normal operation of the charging system 1000 by adopting the charger 100 of the above embodiment.

[0079] It is understandable that the power supply 200 may be a commercial power supply, and the device to be charged 300 may be a vehicle or the like.

[0080] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or means that the first feature is lower in level than the second feature.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A charger, characterized in that: include: A power plug (10) for detachably connecting to a power supply (200); A charging plug (20) is used for detachably connecting to the device to be charged (300), wherein the charging plug (20) is connected to the power plug (10) via a charging cable (30); and A temperature control branch (40), wherein an input end of the temperature control branch (40) is connected to the charging cable (30), the temperature control branch (40) comprises a temperature control unit (41) and a first power supply unit (42) connected in series with the temperature control unit (41), and a potential difference between two ends of the first power supply unit (42) is greater than a preset threshold.

2. The charger according to claim 1, characterized in that: It also includes a function box (50), the charging cable (30) passes through the function box (50), and the function box (50) includes the first power supply unit (42).

3. The charger according to claim 2, characterized in that: The function box (50) further comprises an electric control switch (51), the electric control switch (51) comprising a control end (511) and a switch assembly (512), the switch assembly (512) being arranged on the charging cable (30), the input end of the temperature control branch (40) being connected to the charging cable (30) between the power plug (10) and the switch assembly (512), and the output end being connected to the control end (511).

4. The charger according to claim 3, characterized in that: The temperature control unit (41) is arranged on the power plug (10); The temperature control unit (41) is used to turn on the temperature control branch (40) when the temperature of the power plug (10) is less than a temperature threshold, so that the control end (511) is powered on; the control end (511) is used to control the switch component (512) to be closed in a powered-on state, so that the charging cable (30) is powered on; The temperature control unit (41) is further used to disconnect the temperature control branch (40) when the temperature of the power plug (10) is greater than the temperature threshold, so as to cut off the power to the control end (511); the control end (511) is further used to control the switch component (512) to open in a power-off state, so as to cut off the power to the charging cable (30).

5. The charger according to claim 3, characterized in that: The input end of the temperature control branch (40) is connected to the charging cable (30) in the functional box (50).

6. The charger according to claim 4, characterized in that: The functional box (50) further comprises a control module (52), one end of the control module (52) being connected to the input end of the first power supply unit (42), and the other end being connected to the charging plug (20), the control module (52) being used to determine the conduction state of the temperature control unit (41) according to the voltage at the input end of the first power supply unit (42), and to adjust the charging current output by the charging cable (30) according to the conduction state of the temperature control unit (41).

7. The charger according to claim 6, characterized in that: The control module (52) comprises a processing unit (521) and a first voltage detection circuit (522), one end of the first voltage detection circuit (522) is connected to the input end of the first power supply unit (42), and the other end is connected to the processing unit (521), the first voltage detection circuit (522) is used to detect the voltage at the input end of the first power supply unit (42) and send the voltage at the input end of the first power supply unit (42) to the processing unit (521).

8. The charger according to claim 6, characterized in that: The control module (52) further comprises a current detection circuit (523), one end of the current detection circuit (523) being connected to the charging cable (30) and the other end being connected to the processing unit (521), the current detection circuit (523) being used to detect the charging current output by the charging cable (30) and to send the charging current output by the charging current to the processing unit (521).

9. The charger according to claim 6, characterized in that: The control module (52) further comprises a regulating circuit (524), one end of the regulating circuit (524) being connected to the processing unit (521) and the other end of the regulating circuit (524) being connected to the charging plug (20); The control circuit (524) is used to adjust the duty cycle when the voltage at the input end of the first power supply unit (42) is 0, so as to adjust the charging current output by the charging cable (30).

10. The charger according to claim 9, characterized in that: A first switch (53) is provided on the line between the control circuit (524) and the charging plug (20), and the first switch (53) is used to switch on or off the line between the control circuit (524) and the charging plug (20).

11. The charger according to claim 6, characterized in that: The output end of the first power supply unit (42) is connected to the control module (52) to supply power to the processing unit (521), and a reverse current isolation element is provided between the output end of the first power supply unit (42) and the processing unit (521).

12. The charger according to claim 3, characterized in that: A second switch (54) is provided on the line between the first power supply unit (42) and the control end (511) of the electric control switch (51), and the second switch (54) is used to power on or off the charging cable (30).

13. The charger according to claim 6, characterized in that: It also includes a second power supply unit (57), one end of the second power supply unit (57) is connected to the charging cable (30), and the other end is connected to the control module (52).

14. A charging system, characterized in that: include; Power supply (200); The charger according to any one of claims 1 to 13, wherein the power plug (10) is detachably electrically connected to the power supply (200); as well as The device to be charged (300) is electrically connected to the charging plug (20) in a detachable manner.

Images