Connector structure
By designing a shared temperature sensing circuit and interlocking circuit in the connector, the complex and cost problems in the high-voltage connection system of new energy vehicles are solved, and the sharing effect of real-time temperature monitoring and safe interlocking is achieved.
Patent Information
- Application Number
- CN202420201868.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-01-26
AI Technical Summary
In the high-voltage connection system of new energy vehicles, the existing technology needs to set up interlock circuits and temperature monitoring circuits separately, resulting in complex circuits and high cost. The connectors on the same end of the temperature sensor and the interlock connector are too large and difficult to be placed.
A connector structure is designed, including a first conductor, a temperature sensing circuit and an interlocking circuit. The temperature sensing circuit monitors the conductor temperature in real time through a temperature sensor and is electrically connected to the interlocking circuit through a common positive electrode connection row. When the temperature exceeds a threshold or is disconnected from the connection, the current transmission is disconnected.
Real-time temperature monitoring and interlocking functions are shared, saving wire usage, reducing assembly difficulty and cost, and reducing the volume of a single connector.
Smart Images
Figure CN222601624U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electrical transmission, and in particular relates to a connector structure. Background Art
[0002] In the high-voltage connection system of new energy vehicles, a large number of connectors are used for power transmission. With the rapid development of new energy vehicles, the current transmitted through the connector is getting larger and larger. The temperature of the conductor will increase accordingly during transmission. If the temperature is too high, fire and other dangers will occur. Therefore, the temperature of the connector must be monitored by a temperature sensor. At the same time, an interlocking structure needs to be set in the circuit of high current transmission to ensure the safety of electricity use. The current interlocking circuit and temperature monitoring circuit are two circuits set separately. When in use, more lines need to be set to transmit the temperature signal of the interlocking signal separately, which will increase the cost. At the same time, the space used to prevent the connector in the current vehicle is very limited. If the temperature sensor and the interlocking connector are placed on the connector at the same end, the connector at this end will be too large and difficult to place. Therefore, a new solution is urgently needed in the prior art to solve the above problems. Utility Model Content
[0003] The utility model provides a connector structure, comprising a connector and a plug-in connector connected thereto, characterized in that the connector comprises a first conductor, a temperature sensing circuit and an interlocking circuit, the plug-in connector comprises a second conductor and an interlocking connector, and the first conductor is electrically connected to the end of the second conductor;
[0004] The temperature sensing circuit includes a temperature sensor attached to the first conductor, a positive sensing wire and a negative sensing wire connected to the temperature sensor, and a temperature sensing pin electrically connected to the negative sensing wire;
[0005] The interlocking circuit includes a positive electrode connection row and a negative electrode connection row that are disconnected from each other. When the connector is plugged into the plug-in connector, the interlocking connector is connected to one end of the positive electrode connection row and one end of the negative electrode connection row to communicate with the interlocking circuit, and the positive electrode sensing wire is electrically connected to the positive electrode connection row.
[0006] When the connector is detached from the mating connector, or the temperature sensor detects that the temperature of the first conductor exceeds a pre-test threshold, the other end of the positive connection row and the other end of the negative connection row, as well as the temperature sensing pin transmit a signal and stop the first conductor and the second conductor from conducting current.
[0007] The temperature sensing pin, the positive electrode connection bar and the negative electrode connection bar are integrally stamped from plate-shaped metal.
[0008] The positive electrode connection bar and the negative electrode connection bar are arranged perpendicular to the interlocking connector.
[0009] The positive electrode connection row includes a positive electrode contact, the temperature sensing pin includes a temperature sensing contact, the positive electrode sensing wire is electrically connected to the positive electrode contact, and the negative electrode sensing wire is electrically connected to the temperature sensing contact.
[0010] It also includes an FPC, and the positive electrode sensing wire and the negative electrode sensing wire are at least partially a loop in the FPC.
[0011] There are multiple first conductors, the number of the temperature sensors matches the number of the first conductors one by one, and the positive electrode sensing wire and the negative electrode sensing wire are respectively connected to the multiple temperature sensors.
[0012] The temperature sensor is a PTC sensor or an NTC sensor.
[0013] The connector comprises a shell, the conductor at least partially extends into the shell, and the temperature sensor is arranged in the shell and attached to the conductor to detect the temperature of the conductor.
[0014] The shell is provided with a vent, and the vent is provided with a vent valve.
[0015] The plug-in connector comprises an openable first cover body, the interlocking connector is arranged on the cover body, the first cover body is in a covered state, and the interlocking connector is connected to the interlocking circuit.
[0016] It also includes an AD converter, which is arranged in the temperature sensing loop.
[0017] The utility model has the following beneficial effects: when the connector is connected to the plug-in connector, the temperature sensor can monitor the temperature of the first conductor in real time, and transmit the temperature information through the temperature sensing circuit. When the temperature of the first conductor exceeds the pre-trial threshold, the temperature sensing circuit transmits a signal to the control system, and the control system stops the first conductor and the second conductor electrically connected to each other from conducting current to protect the safety of electrical transmission. At the same time, in the present application, the interlocking circuit and the temperature sensing circuit share part of the circuit, namely the positive electrode connection row, which can save the amount of wire, reduce the difficulty of assembly, and save costs. In addition, the temperature sensor and the high-voltage connector are located on the two interconnected connectors, which reduces the production difficulty and overall volume of a single connector.
[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.
[0020] Figure 1 The utility model is a structural schematic diagram of a connector structure.
[0021] Figure 2 The utility model is a transmission line schematic diagram of a connector structure.
[0022] Figure 3 The utility model is an assembly diagram of a plug-in connector of a connector structure.
[0023] Figure 4 The utility model is a schematic diagram of the internal structure of a connector of a connector structure.
[0024] The following are marked in the figure:
[0025] 1-connector, 11-first conductor, 121-temperature sensor, 122-positive electrode sensing wire, 123-negative electrode sensing wire, 124-temperature sensing pin, 131-positive electrode connection row, 132-negative electrode connection row, 14-housing, 141-vent valve;
[0026] 2-pair connector, 21-second conductor, 22-interlocking connector, 23-first cover;
[0027] 3-FPC;
[0028] 4-AD converter. DETAILED DESCRIPTION
[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.
[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.
[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.
[0032] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.
[0033] A connector structure such as Figure 1-Figure 4 As shown, it includes a connector 1 and a plug-in connector 2 connected thereto, the connector 1 includes a first conductor 11, a temperature sensing circuit and an interlocking circuit, the plug-in connector 2 includes a second conductor 21 and an interlocking connector 22, and the first conductor 11 is electrically connected to the end of the second conductor 21;
[0034] The temperature sensing circuit includes a temperature sensor 121 attached to the first conductor 11, a positive sensing wire 122 and a negative sensing wire 123 connected to the temperature sensor 121, and a temperature sensing pin 124 electrically connected to the negative sensing wire 123;
[0035] The interlocking circuit includes a positive electrode connection row 131 and a negative electrode connection row 132 that are disconnected from each other. When the connector 1 is plugged into the plug-in connector 2, the interlocking connector 22 is connected to one end of the positive electrode connection row 131 and one end of the negative electrode connection row 132 to communicate with the interlocking circuit, and the positive electrode sensing wire 122 is electrically connected to the positive electrode connection row 131.
[0036] When the connector 1 is disconnected from the plug-in connector 2, or the temperature sensor 121 detects that the temperature of the first conductor 11 exceeds a pre-test threshold, the other end of the positive connection row 131 and the other end of the negative connection row 132, as well as the temperature sensing pin 124 transmit a signal and stop the first conductor 11 and the second conductor 21 from conducting current.
[0037] In such Figure 1In the illustrated embodiment, the conductor in the connector 1 includes a columnar portion and a flat portion connected to each other, and the temperature sensor 121 is attached to the flat portion. When the connector 1 is connected to the plug connector 2, the first conductor 11 and the second conductor 21 are electrically connected, and electric energy can be transmitted. The temperature sensor 121 is attached to the first conductor 11. The temperature sensor 121 can monitor the temperature of the first conductor 11 in real time and transmit the temperature information through the temperature sensing circuit. When the temperature of the first conductor 11 exceeds the pre-trial threshold, the temperature sensing circuit transmits a signal to the control system, and the control system stops the first conductor 11 and the second conductor 21 electrically connected to each other from conducting current. In a specific use environment, the control system can be different devices. For example, in an electric vehicle charging system, the control system is a BMS. The first conductor 11 detected by the temperature sensor 121 is a charging line connecting the charging seat and the battery pack. During the vehicle charging process, if the temperature of the first conductor 11 is too high, it is likely to cause a fire, endangering life and property safety. The temperature sensor 121 can measure the temperature of the first conductor 11 during charging. When the temperature exceeds the threshold, the BMS controls the charging system to stop working, and the first conductor 11 stops conducting current, thereby ensuring safety. The interlocking circuit is connected to the positive connection row 131 and the negative connection row 132 through the interlocking connector 22 for conduction. When the connector 1 is connected to the plug connector 2, the interlocking connector 22 connects the positive connection row 131 and the negative connection row 132, the interlocking circuit is turned on, and the current of the first conductor 11 and the second conductor 21 can be transmitted normally. When the interlocking connector 22 is separated from the positive connection row 131 and the negative connection row 132, the interlocking circuit is disconnected. At this time, the control system controls the first conductor 11 and the second conductor 21 to stop conducting current, thereby ensuring safety. If the interlocking circuit and the temperature sensing circuit use their own wires and PIN pins, the interlocking circuit includes a positive line and a negative line, and the temperature sensing circuit also includes a positive line and a negative line, then at least 4 lines and corresponding PIN pins are required to realize signal transmission. If there are multiple first conductors 11 in the connector 1, multiple temperature sensors 121 are required, and each additional temperature sensor 121 requires two more lines and one PIN pin. Thus, when there are two temperature sensors 121 and one interlocking loop, six lines are required, and when there are three temperature sensors 121, eight lines are required. Such a large number of lines not only require a large amount of raw materials, but are also difficult to arrange in the use environment. In the present application, the interlocking loop and the temperature sensing loop share part of the circuit, namely the positive electrode connection row 131, which can save the amount of wire, reduce the difficulty of assembly, and save costs.
[0038] In some embodiments, the temperature sensing pin 124, the positive electrode connection bar 131 and the negative electrode connection bar 132 are integrally stamped from sheet metal. The integrally formed design can reduce connection points and improve assembly efficiency.
[0039] In some embodiments, the positive electrode connection bar 131 and the negative electrode connection bar 132 are arranged vertically with the interlocking connector 22. The vertical arrangement enables the positive electrode connection bar 131 and the negative electrode connection bar 132 to be not in the same plane with the interlocking connector 22, which is convenient for plugging with the outside.
[0040] In some embodiments, the positive electrode connection row 131 includes a positive electrode contact, the temperature sensing pin 124 includes a temperature sensing contact, the positive electrode sensing wire 122 is electrically connected to the positive electrode contact, and the negative electrode sensing wire 123 is electrically connected to the temperature sensing contact. Thus, the temperature sensor 121 and the positive electrode of the interlocking circuit share the positive electrode line, thereby reducing the number of required lines.
[0041] It also includes FPC3, and the positive electrode sensing wire 122 and the negative electrode sensing wire 123 are at least partially the loop in the FPC3. FPC3 is a flexible printed circuit board, which is a printed circuit made of a flexible insulating substrate and has many advantages that rigid printed circuit boards do not have. FPC3 can be bent, wound, and folded freely, can be arranged arbitrarily according to the spatial layout requirements, and can be moved and stretched arbitrarily in three-dimensional space, so as to meet the needs of different usage scenarios.
[0042] In some embodiments, the number of the first conductors 11 is multiple, the number of the temperature sensors 121 matches the number of the first conductors 11, and the positive electrode sensing wire 122 and the negative electrode sensing wire 123 are respectively connected to the multiple temperature sensors 121. Figure 2 As shown, each temperature sensor 121 monitors the temperature data of different first conductors 11 . If the temperature of any first conductor 11 is abnormal, the control system can detect it in time and cut off the current passing through the connector 1 .
[0043] In some embodiments, the temperature sensor 121 is a PTC sensor or an NTC sensor. The advantages of using an NTC temperature sensor or a PTC temperature sensor are that it is easy to use, only requires two connecting wires, is easy to process into complex shapes, can be mass-produced, has good stability, and has a strong overload capacity, and is suitable for products such as conversion joints that require small size and stable performance.
[0044] In some embodiments, the connector 1 includes a housing 14, the first conductor 11 at least partially extends into the housing 14, and the temperature sensor 121 is disposed in the housing 14 and attached to the first conductor 11 to detect the temperature of the first conductor 11. The temperature sensor 121 can monitor the temperature of the first conductor 11 in the housing 14 in real time and send it to the control system. When it is found that the temperature of the first conductor 11 is abnormal, the control system will disconnect the current of the first conductor 11 to ensure safety.
[0045] In some embodiments, the housing 14 is provided with a vent, and the vent is provided with a vent valve 141. Because the temperature change of the first conductor 11 is relatively large, it will cause the air pressure in the housing 14 to change relatively large, and the vent valve 141 can keep the air pressure in the housing 14 balanced with the air pressure outside. At the same time, after the temperature of the first conductor 11 increases and then decreases, the water vapor in the housing 14 will condense into water droplets during the cooling process. The water droplets attached to the first conductor 11 will cause corrosion on the surface of the first conductor 11, and even cause a short circuit in the electrical components in the housing 14. When the vent valve 141 is opened, the gas flow inside and outside the housing 14 can be increased to prevent the condensation of water vapor in the housing 14.
[0046] In some embodiments, the plug connector 2 includes an openable first cover 23, the interlocking connector 22 is disposed on the cover 23, the first cover 23 is in a closed state, and the interlocking connector 22 is connected to the interlocking circuit. When the first cover 23 is opened, the positive connection row 131 and the negative connection row 132 of the interlocking connector 22 are disconnected, thereby disconnecting the interlocking circuit, and the first conductor 11 stops conducting current.
[0047] In some embodiments, an AD converter 4 is also included, such as Figure 4 As shown, the AD converter 4 is arranged in the temperature sensing loop. The AD converter 4 converts the analog signal into a digital signal and transmits it to the control system. Only one AD converter 4 is needed to complete the signal conversion of multiple temperature sensors 121. The control system can adjust the current passing through the first conductor 11 according to the obtained temperature of the temperature sensor 121. If the temperature is too high, the current of the first conductor 11 is reduced to ensure that the temperature of the first conductor 11 is below the pre-trial threshold. Once the temperature exceeds the pre-trial threshold, the temperature sensing pin transmits a signal to stop the first conductor 11 and the second conductor 21 from conducting current.
[0048] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.
Claims
1. A connector structure, comprising a connector and a plug-in connector connected thereto, characterized in that: The connector includes a first conductor, a temperature sensing circuit and an interlocking circuit, the plug-in connector includes a second conductor and an interlocking connector, and the first conductor is electrically connected to an end of the second conductor; The temperature sensing circuit includes a temperature sensor attached to the first conductor, a positive sensing wire and a negative sensing wire connected to the temperature sensor, and a temperature sensing pin electrically connected to the negative sensing wire; The interlocking circuit includes a positive electrode connection row and a negative electrode connection row that are disconnected from each other. When the connector is plugged into the plug-in connector, the interlocking connector is connected to one end of the positive electrode connection row and one end of the negative electrode connection row to communicate with the interlocking circuit, and the positive electrode sensing wire is electrically connected to the positive electrode connection row. When the connector is detached from the mating connector, or the temperature sensor detects that the temperature of the first conductor exceeds a pre-test threshold, the other end of the positive connection row and the other end of the negative connection row, as well as the temperature sensing pin transmit a signal and stop the first conductor and the second conductor from conducting current.
2. A connector structure according to claim 1, characterized in that: The temperature sensing pin, the positive electrode connection bar and the negative electrode connection bar are integrally stamped from plate-shaped metal.
3. A connector structure according to claim 1, characterized in that: The positive electrode connection bar and the negative electrode connection bar are arranged perpendicular to the interlocking connector.
4. A connector structure according to claim 1, characterized in that: The positive electrode connection row includes a positive electrode contact, the temperature sensing pin includes a temperature sensing contact, the positive electrode sensing wire is electrically connected to the positive electrode contact, and the negative electrode sensing wire is electrically connected to the temperature sensing contact.
5. A connector structure according to claim 1, characterized in that: It also includes an FPC, and the positive electrode sensing wire and the negative electrode sensing wire are at least partially a loop in the FPC.
6. A connector structure according to claim 1, characterized in that: There are multiple first conductors, the number of the temperature sensors matches the number of the first conductors one by one, and the positive electrode sensing wire and the negative electrode sensing wire are respectively connected to the multiple temperature sensors.
7. A connector structure according to claim 1, characterized in that: The temperature sensor is a PTC sensor or an NTC sensor.
8. A connector structure according to claim 1, characterized in that: The connector comprises a shell, the conductor at least partially extends into the shell, and the temperature sensor is arranged in the shell and attached to the conductor to detect the temperature of the conductor.
9. A connector structure according to claim 8, characterized in that: The shell is provided with a vent, and the vent is provided with a vent valve.
10. A connector structure according to claim 1, characterized in that: The plug-in connector comprises an openable first cover body, the interlocking connector is arranged on the cover body, the first cover body is in a covered state, and the interlocking connector is connected to the interlocking circuit.
11. A connector structure according to claim 1, characterized in that: It also includes an AD converter, which is arranged in the temperature sensing loop.