CN112072412B - Plug assembly with over-temperature protection - Google Patents
Plug assembly with over-temperature protection Download PDFInfo
- Publication number
- CN112072412B CN112072412B CN202010940833.1A CN202010940833A CN112072412B CN 112072412 B CN112072412 B CN 112072412B CN 202010940833 A CN202010940833 A CN 202010940833A CN 112072412 B CN112072412 B CN 112072412B
- Authority
- CN
- China
- Prior art keywords
- temperature sensing
- sensing element
- pin
- temperature
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/04—Pins or blades for co-operation with sockets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
A plug assembly with over-temperature protection, the plug assembly comprising: the plug comprises a plug main body, a plurality of contact pins, at least one temperature sensing element and a control circuit, wherein the contact pins are arranged on a plug base and used for being in electrical contact with socket elastic sheets in a socket, the at least one temperature sensing element is arranged in at least one contact pin in the plurality of contact pins and used for sensing the temperature of the corresponding contact pin, and the control circuit is electrically connected with the at least one temperature sensing element through signal wires; and a cable portion including a power cord electrically connected to the pin. Wherein the control circuit is configured to receive the temperature sensing signals from at least one temperature sensing element via the signal lines, respectively, and to perform an over-temperature protection action when it is determined that a metric value of the temperature sensing signal from any temperature sensing element exceeds a threshold value.
Description
Technical Field
The present invention relates to a plug assembly, and more particularly, to a plug assembly with over-temperature protection.
Background
Power plugs play an important role in today's various industries. However, the power plug has various use environments and a long service cycle, so that stress relaxation or surface contamination may occur in the joint between the plug pin and the socket spring plate after long-term use, and further the resistance of the joint between the plug pin and the socket spring plate is increased, and the temperature rise of the joint is increased rapidly after long-term continuous use. Even more, the fire will be caused, and there is a great potential safety hazard.
Currently, there is a plug assembly design with a function of sensing the temperature of the plug and taking corresponding measures, and most of them select to sense the temperature in the plug housing or sense the temperature of the power line. However, temperature rise often occurs first at the plug pins engaged with the socket, and if sensing of the temperature inside the plug housing or the temperature of the power line is selected, the sensing result is affected by environmental factors and is delayed.
Accordingly, there is a need for a plug assembly that can accurately and quickly sense the temperature of the plug pins and take corresponding over-temperature protection measures.
Disclosure of Invention
The invention provides a plug assembly with over-temperature protection.
In at least one embodiment, the plug assembly of the present invention comprises: the plug comprises a plug main body, a plurality of contact pins, at least one temperature sensing element and a control circuit, wherein the contact pins are arranged on a plug base and used for being in electrical contact with socket elastic sheets in a socket, the at least one temperature sensing element is arranged in at least one contact pin in the plurality of contact pins and used for sensing the temperature of the corresponding contact pin, and the control circuit is electrically connected with the at least one temperature sensing element through signal wires; and a cable portion including a power cord electrically connected to the pin. Wherein the control circuit is configured to receive temperature sensing signals from at least one temperature sensing element via the signal lines, respectively, and to perform an over-temperature protection action when it is determined that a metric value of the temperature sensing signal from any of the temperature sensing elements exceeds a threshold value.
In some embodiments, the plug body further includes a switching circuit coupled to the control circuit and the power cord. When the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed the threshold value, the executing over-temperature protection action comprises the following steps: when it is judged that the measure of the temperature sensing signal from any of the temperature sensing elements exceeds the first threshold value, the control switch circuit cuts off the current flowing through the power supply line.
In some embodiments, the plug body further includes a current limiting circuit coupled to the control circuit and the power cord. When the metric value of the temperature sensing signal from any temperature sensing element exceeds the threshold value, the execution of the over-temperature protection action comprises the following steps: when the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed a first threshold value, the current limiting circuit is controlled to limit the current flowing through the power line.
In some embodiments, the plug body includes both a switching circuit and a current limiting circuit, both coupled to the control circuit and the power cord. When the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed the threshold value, the executing over-temperature protection action comprises the following steps: controlling the switching circuit to cut off a current flowing through the power supply line when it is judged that the measure of the temperature sensing signal from any of the temperature sensing elements exceeds a first threshold; when the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed a second threshold value lower than the first threshold value, the current limiting circuit is controlled to limit the current flowing through the power line.
In some embodiments, the control circuit is further configured to stop performing the over-temperature protection action when it is determined that the metric values of the temperature sensing signals from all of the temperature sensing elements are below the threshold value.
In some embodiments, the plurality of pins includes a hot pin, a neutral pin, and a ground pin, and the hot pin and the neutral pin each have a temperature sensing element disposed therein.
In some embodiments, the thickness of the temperature sensing element is configured such that the temperature sensing element radially abuts an inner wall of the pin.
In some embodiments, the temperature sensing element is disposed within the pin at a location configured to be proximate to a junction of the pin and the socket spring when the pin is inserted into the socket.
The invention also provides an over-temperature protection plug assembly with the external control box.
In at least one embodiment, the plug assembly with an external control box of the present invention comprises: the plug comprises a plug main body, a plurality of contact pins and at least one temperature sensing element, wherein the contact pins are arranged on a plug base and used for being in electric contact with socket elastic sheets in a socket, and the temperature sensing element is arranged in at least one contact pin in the plurality of contact pins and used for sensing the temperature of the corresponding contact pin; a cable part including a power line connected to the pin and a signal line connected to the temperature sensing element; and an external control box coupled to the cable part, outputting at least a portion of the power from the power line, the external control box including a control circuit electrically connected with the at least one temperature sensing element via signal lines, respectively. Wherein the control circuit is configured to receive the temperature sensing signals from at least one temperature sensing element via the signal lines, respectively, and to perform an over-temperature protection action when it is determined that a metric value of the temperature sensing signal from any temperature sensing element exceeds a threshold value.
In some embodiments, the external control box further comprises a switching circuit coupled to the control circuit and the power line. When the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed the threshold value, the executing over-temperature protection action comprises the following steps: when it is judged that the magnitude of the temperature sensing signal from any of the temperature sensing elements exceeds the first threshold value, the switching circuit is controlled to cut off the current flowing through the power supply line.
In some embodiments, the external control box further includes a current limiting circuit coupled to the control circuit and the power cord. When the metric value of the temperature sensing signal from any temperature sensing element exceeds the threshold value, the execution of the over-temperature protection action comprises the following steps: and when the measured value of the temperature sensing signal from any temperature sensing element is judged to exceed the first threshold value, controlling the current limiting circuit to limit the current flowing through the power line.
In some embodiments, the external control box includes both a switching circuit and a current limiting circuit, and both the switching circuit and the current limiting circuit are coupled to the control circuit and the power cord. When the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed the threshold value, the executing over-temperature protection action comprises the following steps: controlling the switching circuit to cut off a current flowing through the power supply line when it is judged that the measure of the temperature sensing signal from any of the temperature sensing elements exceeds a first threshold; and when the measured value of the temperature sensing signal from any temperature sensing element is judged to exceed a second threshold value lower than the first threshold value, controlling the current limiting circuit to limit the current flowing through the power line.
In some embodiments, the control circuit is further configured to stop performing the over-temperature protection action when it is determined that the measure values of the temperature sensing signals from all the temperature sensing elements are below the threshold value.
In some embodiments, the plurality of pins includes a live pin, a neutral pin, and a ground pin, and the live pin and the neutral pin each have a temperature sensing element disposed therein.
In some embodiments, the thickness of the temperature sensing element is configured such that the temperature sensing element radially abuts an inner wall of the pin.
In some embodiments, the temperature sensing element is disposed within the pin at a location configured to be proximate to a junction of the pin and the socket spring when the pin is inserted into the socket.
Drawings
In order to more clearly illustrate the embodiments of the present invention, reference will now be made briefly to the accompanying drawings, which are included to describe certain embodiments of the invention.
FIG. 1A is a schematic diagram of an example plug assembly 100 including a cross-sectional view of a temperature sensing element, according to an embodiment;
fig. 1B is a block diagram of the example plug assembly 100 of fig. 1A, according to an embodiment;
FIG. 2 is a block diagram of an example plug assembly 200 according to another embodiment;
FIG. 3 is a block diagram of an example plug assembly 300 according to yet another embodiment;
FIG. 4 is a block diagram of an example plug assembly 400 according to yet another embodiment;
FIG. 5 is a block diagram of an example plug assembly 500 according to yet another embodiment;
FIG. 6 is a block diagram of an example plug assembly 600 according to yet another embodiment;
FIG. 7A is a schematic diagram of a pin engaging a header base including a cross-sectional view of a temperature sensing element according to an embodiment;
fig. 7B is a schematic diagram of a pin engaging a header base according to an embodiment;
fig. 8 is a block diagram of the example plug assembly of fig. 6 connected with an input and an output, according to an embodiment.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and the described embodiments are only some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
In the description of the present invention, the terms "upper", "lower", "left", "right", "axial", "radial", "vertical", "horizontal", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the referenced apparatus or component must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a sequential or relative importance.
Furthermore, unless otherwise specified, the terms "attached," "mounted," "connected," and the like are to be construed broadly and to provide those of ordinary skill in the art with the understanding that such terms are intended to be broadly construed.
The plug assembly with the over-temperature protection is characterized in that the temperature sensing element is arranged in the plug pin and used for sensing the temperature of the joint of the plug pin and the socket elastic sheet when the plug is inserted into the socket, so that the temperature rise state of the socket pin can be accurately and quickly determined, and corresponding countermeasures are taken to protect the power utilization safety.
The structure of the plug assembly of the present invention will be described herein in detail with reference to the following drawings. It will be understood that other aspects not depicted in the drawings will fall within the scope of the present disclosure. Like reference symbols in the various drawings indicate like elements. It will be understood, however, that the use of a reference number to refer to an element in a given figure is not intended to limit the element identified by the same reference number in another figure. Moreover, the use of different reference numbers to refer to elements in different figures is not intended to indicate that the referenced elements may not be the same or similar.
FIG. 1A is a schematic diagram of an example plug assembly 100 including a cross-sectional view of a temperature sensing element, according to an embodiment; and fig. 1B is a block diagram of the example plug assembly 100 of fig. 1A.
Referring to fig. 1A and 1B, a plug assembly 100 according to an embodiment includes a plug main body 101 and a cable part 103. The plug main body 101 includes a plug housing 12 and a plug base 14. A plurality of pins, such as a neutral pin 15, a live pin 16, and a ground pin 17, are disposed on the plug base 14, and the pins (15, 16, 17) are connected to power lines (152, 162, 172), i.e., a neutral power line 152, a live power line 162, and a ground power line 172, respectively. It will be appreciated that in some embodiments, such as small appliance plugs, the ground pin 17 may not be provided and the pins may include only neutral and live pins 15, 16 and the power lines may include only neutral and live power lines 152, 162.
The plug assembly 100 includes at least one temperature sensing element 18. The at least one temperature sensing element 18 is disposed in at least one of the plurality of pins (15, 16, 17) for sensing a temperature of the pin (15, 16, 17). Each temperature sensing element 18 is connected to a respective signal line 182.
In this embodiment, temperature sensing elements 18 are provided in the neutral pin 15 and the live pin 16. For ease of illustration, only the temperature sensing element 18 within the hot pin 16 is shown.
In order to accommodate the temperature sensing element 18, the pins 15, 16 are provided with cavities communicating with the outside. The temperature sensing element 18 is disposed within the cavity, and the signal line 182 may be connected to the outside through the cavity.
In some embodiments, the temperature sensing element 18 or the cavity is dimensioned such that the temperature sensing element 18 radially abuts the inner wall of the pins 15, 16. Therefore, the heat transfer between the temperature sensing element 18 and the pins 15 and 16 is always thermal conduction, and the temperature of the pins 15 and 16 can be sensed more accurately and stably.
In some embodiments, the axial position of the temperature sensing element 18 in the pins 15, 16 is configured to be close to the junction of the pins 15, 16 and the socket spring when the pins 15, 16 are inserted into the socket. Therefore, the temperature sensing element 18 can quickly and accurately measure the temperature of the joints of the pins 15 and 16 and the socket spring plates and generate temperature sensing signals.
In the present embodiment, the power supply lines (152, 162, 172) serve as the cable part 103. The plug assembly 100 also includes a control circuit 192 disposed within the plug body 101. The control circuit 192 is coupled to the signal line 182 of the temperature sensing element 18 for receiving the temperature sensing signal from the temperature sensing element 18 and determining whether to perform the over-temperature protection action based on the temperature sensing signal.
In an exemplary embodiment, when it is determined that a measure of the temperature sensing signal, e.g., voltage or current, from any of the temperature sensing elements 18 in the pins 15, 16 exceeds a predetermined threshold, the control circuit 192 performs an over-temperature protection action, e.g., causes current flow through the power lines (152, 162, 172) to be cut off. In some embodiments, the over-temperature protection action may be stopped when it is determined that the metric values of all temperature sensing signals are below the threshold value, i.e. the temperature of the pins 15, 16 returns below the temperature that triggered the over-temperature protection.
As an example, referring to fig. 1B, a switch circuit 194 may be further disposed within the plug main body 101, the switch circuit 194 being coupled with the control circuit 192 and the power lines (152, 162, 172). When the control circuit 192 determines that the measure of any temperature sensing signal exceeds the threshold, the control circuit 192 provides a control signal to the switching circuit 194 such that the current flowing through the power lines (152, 162, 172) is cut off. Further, when control circuit 192 determines that all of the measures of the temperature sensing signals are below the threshold, control circuit 192 may cause switching circuit 194 to cease cutting off current flowing through power lines (152, 162, 172).
Fig. 2 shows a block diagram of a plug assembly 200 according to another embodiment. The plug assembly 200 differs from the plug assembly 100 described above with reference to fig. 1B in that the switching circuit 194 within the plug body 101 is replaced with a current limiting circuit 196.
Referring to fig. 1A and 2, the current limiting circuit 196 is coupled to the control circuit 192 and the power lines (152, 162, 172) of the plug assembly 200. In this embodiment, the control circuitry 192 is configured to receive temperature sensing signals from the temperature sensing elements 18 within the pins 15, 16, respectively, via the signal line 182, and to control the current limiting circuitry 196 to limit current flowing through the power lines (152, 162, 172) when a measure of any of the temperature sensing signals is determined to exceed a threshold. Further, when control circuit 192 determines that all of the temperature sensing signal metrics are below the threshold, current limiting circuit 196 may be caused to stop limiting current flowing through the power lines (152, 162, 172).
Fig. 3 shows a block diagram of a plug assembly 300 according to yet another embodiment. The plug assembly 300 of the present embodiment houses both the switching circuit 194 and the current limiting circuit 196 within the plug body 101.
Referring to fig. 1A and 3, both the switching circuit 194 and the current limiting circuit 196 are coupled with the control circuit 192 and the power lines. In this embodiment, the control circuitry 192 is configured to receive temperature sensing signals from the temperature sensing elements 18 within the pins 15, 16, respectively, via the signal lines 182 and to determine a measure of the temperature sensing signals. When it is determined that the measure of any of the temperature sensing signals exceeds the first threshold, the control circuit 192 controls the switching circuit 194 to cut off the current flowing through (152, 162, 172). Further, when it is determined that the metrics of all the temperature sensing signals are lower than the first threshold value, the switch circuit 194 is caused to stop the cutting off of the current flowing through the power supply lines (152, 162, 172). Alternatively, when it is determined that the measure of any of the temperature sensing signals exceeds a second threshold that is lower than the first threshold, the control circuit 192 controls the current limiting circuit 196 to limit the current flowing through the power lines (152, 162, 172). Further, when it is determined that all of the metrics of the temperature sensing signals are below the second threshold, the current limiting circuit 196 is caused to stop limiting current flowing through the power lines (152, 162, 172).
Fig. 4 shows a block diagram of a plug assembly 400 according to yet another embodiment. The plug assembly 400 differs from the plug assemblies 100, 200, and 300 described above in that the plug assembly 400 further includes an external control box 19. The circumscribed control box 19 is disposed outside the plug main body 101 and houses the control circuit 192 and the switch circuit 194.
In the present embodiment, the power supply lines (152, 162, 172) and the signal line 182 are coupled to the external connection control box 19 as the cable portion 103, and the external connection control box 19 takes at least a part of the power from the power supply lines (152, 162, 172) as an output, the output side of which is coupled to the output-side plug. The control circuit 192 is coupled to the signal line 182 of the temperature sensing element 18 for receiving the temperature sensing signals from the temperature sensing elements 18 in the pins 15, 16, respectively, and determining whether to perform an over-temperature protection action based on the temperature sensing signals. The switching circuit 194 is coupled to the control circuit 192 and the power lines (152, 162, 172). When the control circuit 192 determines that the measure of any temperature sensing signal exceeds the threshold, the control circuit 192 provides a control signal to the switching circuit 194 such that the current flowing through the power lines (152, 162, 172) is cut off. Further, when the control circuit 192 determines that all of the metrics of the temperature sensing signals are below the threshold, the control circuit 192 may cause the switching circuit 194 to stop cutting off the current flowing through the power lines (152, 162, 172).
Fig. 5 shows a block diagram of a plug assembly 500 according to yet another embodiment. The plug assembly 500 differs from the plug assembly 400 described above with reference to fig. 4 in that the switching circuitry 194 within the external control box 19 is replaced with current limiting circuitry 196.
Referring to fig. 5, in the present embodiment, a current limiting circuit 196 is coupled to the control circuit 192 and the power supply lines (152, 162, 172). Control circuitry 192 is configured to receive temperature sensing signals from temperature sensing elements 18 within pins 15, 16, respectively, via signal line 182, and to control current limiting circuitry 196 to limit current flowing through power lines (152, 162, 172) when a measure of any of the temperature sensing signals is determined to exceed a threshold. Further, when control circuit 192 determines that all of the temperature sensing signal metrics are below the threshold, current limiting circuit 196 is disabled from limiting current flowing through the power lines (152, 162, 172).
Fig. 6 illustrates a block diagram of a plug assembly 600 according to yet another embodiment. The plug assembly 600 of the present embodiment accommodates both the switching circuit 194 and the current limiting circuit 196 in the peripheral control box 19.
In the present embodiment, both the switching circuit 194 and the current limiting circuit 196 are coupled to the control circuit 192 and the power supply lines (152, 162, 172). The control circuitry 192 is configured to receive temperature sensing signals from the temperature sensing elements 18 within the pins 15, 16 via the signal lines 182, respectively, and to determine a measure of the temperature sensing signals. When it is determined that the measure of any of the temperature sensing signals exceeds the first threshold, the control circuit 192 controls the switching circuit 194 to cut off the current flowing through (152, 162, 172). Further, when it is determined that the metrics of all the temperature sensing signals are lower than the first threshold value, the switch circuit 194 is caused to stop cutting off the current flowing through the power lines (152, 162, 172). Alternatively, when it is determined that the measure of any of the temperature sensing signals exceeds a second threshold that is lower than the first threshold, the control circuit 192 controls the current limiting circuit 196 to limit the current flowing through the power lines (152, 162, 172). Further, when it is determined that all of the metrics of the temperature sensing signals are below the second threshold, the current limiting circuit 196 is caused to stop limiting current flowing through the power lines (152, 162, 172).
Fig. 7A-7B show schematic views of example pins (15, 16, 17) engaged with the header base 14, where fig. 7A includes a cross-sectional view of the temperature sensing element 18. Referring to fig. 7A-7B, the pins (15, 16, 17) include a neutral pin 15, a live pin 16, and a ground pin 17, and the power lines include a neutral power line 152, a live power line 162, and a ground power line 172 that correspond to the neutral pin 15, the live pin 16, and the ground pin 17, respectively. In the embodiment shown in fig. 7A, the temperature sensing element 18 is disposed in a cavity in which both the neutral pin 15 and the live pin 16 communicate with the outside, respectively, and the signal line 182 is coupled with the temperature sensing element 18 and connected to the outside through the cavity. The dimensions of the temperature sensing element 18 or the cavity are configured such that the temperature sensing element 18 radially abuts the inner wall of the pins 15, 16. Therefore, the heat transfer between the temperature sensing element 18 and the pins 15 and 16 is always thermal conduction, and the temperature of the pins 15 and 16 can be sensed more accurately and stably. The axial position of the temperature sensing element 18 within the pins 15, 16 is configured to be close to the junction of the pins 15, 16 and the socket dome when the pins 15, 16 are inserted into the socket. Therefore, the temperature sensing element 18 can quickly and accurately measure the temperature of the joints of the pins 15 and 16 and the socket spring plates and generate temperature sensing signals.
Referring to fig. 8, there is shown a schematic block diagram of the plug assembly 600 described above with reference to fig. 6 in connection with a load 700 and an input jack 800. The plug assembly 600 is plugged into the input jack 800 at an input end and includes an external control box 19, the external control box 19 housing the control circuit 192, the switching circuit 194, and the current limiting circuit 196 therein. The external control box 19 takes at least a portion of the power from the power line as an output, with its output coupled to an output side plug, shown in fig. 8 as a load plug 72. The load plug 72 is coupled to the load receptacle 74. Thereby enabling connection of the plug assembly 800 at the input and output. In some embodiments, input outlet 800 is a wall outlet for 220V power, and load 700 is a rechargeable battery of an electric vehicle. In the embodiment of fig. 8, the control circuit 192 receives the temperature sensing signal from the temperature sensing element 18 and controls the switching circuit 194 or the current limiting circuit 196 to perform the operation of cutting or limiting the flow of current through the power lines (152, 162, 172) as described above in connection with fig. 6 for the plug assembly 600. It should be appreciated that the example pin assembly 100 and 500 described above in connection with the figures may also be coupled to inputs and outputs in the same or similar manner as shown in FIG. 8.
Through the embodiment, the plug assembly capable of quickly and accurately sensing the temperature of the plug pins and performing power-off or current-limiting operation is provided, so that the service life of the plug assembly is prolonged, and the electricity utilization safety is improved.
The above examples are merely for clarity of illustration and are not intended to limit the embodiments. Other variants and modifications will be apparent to persons skilled in the art in light of the foregoing description, and any such obvious variants or modifications are intended to fall within the scope of the present invention.
Claims (10)
1. A plug assembly with over-temperature protection, comprising:
a plug body comprising:
the contact pins are arranged on the plug base and are used for being in electric contact with socket elastic sheets in the socket;
at least one temperature sensing element respectively arranged in at least one of the pins for sensing the temperature of the corresponding pin;
a control circuit electrically connected to the at least one temperature sensing element via signal lines, respectively;
a switching circuit coupled to the control circuit and a power supply line; and
a current limiting circuit coupled to the control circuit and the power line; and a cable part including the power line, the power line being electrically connected to the pin,
wherein the control circuit is configured to receive the temperature sensing signals from the at least one temperature sensing element via the signal lines, respectively, and perform an over-temperature protection action when the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed a threshold value, including:
controlling the switching circuit to cut off the current flowing through the power supply line when it is judged that the magnitude of the temperature sensing signal from any temperature sensing element exceeds a first threshold; and
and when the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed a second threshold value lower than the first threshold value, controlling the current limiting circuit to limit the current flowing through the power line.
2. The plug assembly of claim 1,
the control circuit is further configured to stop performing the over-temperature protection action when it is determined that the measure values of the temperature sensing signals from all the temperature sensing elements are below the threshold value.
3. The plug assembly of claim 1 or 2,
the plurality of contact pins comprise a live wire contact pin, a zero wire contact pin and a ground wire contact pin,
the temperature sensing elements are respectively arranged in the live wire contact pin and the zero line contact pin.
4. The plug assembly of claim 1 or 2, wherein a thickness of the temperature sensing element is configured such that the temperature sensing element radially abuts an inner wall of the pin.
5. The plug assembly of claim 1 or 2, wherein the temperature sensing element is disposed within the pin at a location configured to be proximate to a junction of the pin and the socket dome when the pin is inserted into the socket.
6. A plug assembly with over-temperature protection, comprising:
a plug body comprising:
the contact pins are arranged on the plug base and are used for being in electric contact with socket elastic sheets in the socket; and
at least one temperature sensing element respectively arranged in at least one of the pins for sensing the temperature of the corresponding pin;
a cable portion comprising:
a power line electrically connected to the contact pin; and
a signal line electrically connected to the temperature sensing element; and
an external control box coupled to the cable portion, taking at least a portion of the power from the power cord as an output, the external control box comprising:
a control circuit electrically connected to the at least one temperature sensing element via the signal lines, respectively;
a switching circuit coupled to the control circuit and the power line; and
a current limiting circuit coupled to the control circuit and the power line,
wherein the control circuit is configured to receive the temperature sensing signals from the at least one temperature sensing element via the signal lines, respectively, and perform an over-temperature protection action when the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed a threshold value, including:
when the magnitude of the temperature sensing signal from any temperature sensing element is judged to exceed a first threshold value, controlling the switch circuit to cut off the current flowing through the power supply line; and
and when the metric value of the temperature sensing signal from any temperature sensing element is judged to exceed a second threshold value lower than the first threshold value, controlling the current limiting circuit to limit the current flowing through the power line.
7. The plug assembly of claim 6,
the control circuit is further configured to stop performing the over-temperature protection action when it is determined that the measure values of the temperature sensing signals from all the temperature sensing elements are below the threshold value.
8. The plug assembly of claim 6 or 7,
the plurality of pins comprise a live wire pin, a zero line pin and a ground wire pin,
the temperature sensing elements are respectively arranged in the live wire contact pin and the zero line contact pin.
9. The plug assembly of claim 6 or 7, wherein a thickness of the temperature sensing element is configured such that the temperature sensing element radially abuts an inner wall of the pin.
10. The plug assembly of claim 6 or 7, wherein the temperature sensing element is disposed within the pin at a location configured to be proximate to a junction of the pin and the socket dome when the pin is inserted into the socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010940833.1A CN112072412B (en) | 2020-09-09 | 2020-09-09 | Plug assembly with over-temperature protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010940833.1A CN112072412B (en) | 2020-09-09 | 2020-09-09 | Plug assembly with over-temperature protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112072412A CN112072412A (en) | 2020-12-11 |
| CN112072412B true CN112072412B (en) | 2022-07-26 |
Family
ID=73663093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010940833.1A Active CN112072412B (en) | 2020-09-09 | 2020-09-09 | Plug assembly with over-temperature protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112072412B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716519A (en) * | 2013-12-13 | 2015-06-17 | 松下知识产权经营株式会社 | Power cord |
| CN206116797U (en) * | 2016-08-31 | 2017-04-19 | 南通大地电气股份有限公司 | Excess temperature protection plug |
| CN107171082A (en) * | 2017-07-07 | 2017-09-15 | 吉林大洋电气科技有限公司 | A kind of thermometric bus pin |
| KR101818893B1 (en) * | 2017-08-23 | 2018-01-16 | 신한길 | Apparatus of connecting a plug for safety |
| CN107658645A (en) * | 2016-07-26 | 2018-02-02 | 台达电子工业股份有限公司 | Power plug arrangement and its excess temperature protection method |
| CN208908281U (en) * | 2018-09-19 | 2019-05-28 | 余姚市嘉荣电子电器有限公司 | A kind of safety plug |
| CN210293487U (en) * | 2019-10-08 | 2020-04-10 | 深圳市敏泰电子有限公司 | Temperature sensor for electric vehicle charging plug and charging plug |
| CN210607885U (en) * | 2019-05-29 | 2020-05-22 | 深圳市鑫鼎元光电有限公司 | High-reliability temperature measuring plug |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016213118A (en) * | 2015-05-12 | 2016-12-15 | パナソニックＩｐマネジメント株式会社 | plug |
| CN105655815B (en) * | 2016-03-17 | 2018-09-21 | 绵阳高新区探索科技有限责任公司 | A kind of new-energy automobile charging gun of charging gun headband temperature protection function |
| CN205811190U (en) * | 2016-07-05 | 2016-12-14 | 浙江艾克米信息科技有限公司 | A kind of plug-in type kitchen appliance is by anti-short circuit terminals protection device |
| CN207116843U (en) * | 2017-07-19 | 2018-03-16 | 朱厚林 | One kind power supply connector |
| CN209487864U (en) * | 2019-01-22 | 2019-10-11 | 苏州富晟一杭汽车部件有限公司 | It is a kind of can temperature detection plug |
| DE102019200870A1 (en) * | 2019-01-24 | 2020-07-30 | Audi Ag | Charging cable |
-
2020
- 2020-09-09 CN CN202010940833.1A patent/CN112072412B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716519A (en) * | 2013-12-13 | 2015-06-17 | 松下知识产权经营株式会社 | Power cord |
| CN107658645A (en) * | 2016-07-26 | 2018-02-02 | 台达电子工业股份有限公司 | Power plug arrangement and its excess temperature protection method |
| CN206116797U (en) * | 2016-08-31 | 2017-04-19 | 南通大地电气股份有限公司 | Excess temperature protection plug |
| CN107171082A (en) * | 2017-07-07 | 2017-09-15 | 吉林大洋电气科技有限公司 | A kind of thermometric bus pin |
| KR101818893B1 (en) * | 2017-08-23 | 2018-01-16 | 신한길 | Apparatus of connecting a plug for safety |
| CN208908281U (en) * | 2018-09-19 | 2019-05-28 | 余姚市嘉荣电子电器有限公司 | A kind of safety plug |
| CN210607885U (en) * | 2019-05-29 | 2020-05-22 | 深圳市鑫鼎元光电有限公司 | High-reliability temperature measuring plug |
| CN210293487U (en) * | 2019-10-08 | 2020-04-10 | 深圳市敏泰电子有限公司 | Temperature sensor for electric vehicle charging plug and charging plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112072412A (en) | 2020-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5590010A (en) | Heat responsive power interrupting device | |
| ES2572931T3 (en) | Power cord | |
| KR100293643B1 (en) | Battery | |
| KR102413545B1 (en) | Flame circuit protection systems, modules and methods | |
| EP1406340B1 (en) | Storage battery device and power source apparatus comprising it | |
| US20200244088A1 (en) | Portable power system with modular battery pack receptacle | |
| JP2022525453A (en) | Circuit board for electric vehicle charging station | |
| CN112072412B (en) | Plug assembly with over-temperature protection | |
| CN103247921A (en) | Temperature sensing plug assembly | |
| CN111211435A (en) | Universal socket with insertion detection function | |
| CN209860814U (en) | Power adapter shell with overheat protection | |
| CN111355107B (en) | Intelligent socket | |
| JP2008021622A (en) | Insertion plug and power cord with attachment plug | |
| CN211295442U (en) | Universal socket with insertion detection function | |
| CN221727597U (en) | High-voltage connector and vehicle-mounted charger | |
| EP3168855B1 (en) | Fuse holder | |
| CN111900032A (en) | High-sensitivity thermal protector | |
| CN218123323U (en) | Circuit breaker and control mechanism | |
| CN213460344U (en) | No-load detection and judgment device for household appliances | |
| CN210040761U (en) | Extension socket | |
| KR20200115974A (en) | Safety type plug recptacle based on LED display function | |
| CN109361095B (en) | High-sensitivity thermistor safety plug | |
| CN221383302U (en) | Plug-in type temperature regulating rod structure with over-temperature thermal protector | |
| CN213522917U (en) | Switching power supply for low-temperature environment | |
| CN219321763U (en) | Electric connector with automatic monitoring function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |