High-voltage socket and high-voltage interlocking system

Abstract

The utility model belongs to the technical field of electric automobiles, and particularly discloses a high-voltage socket and a high-voltage interlocking system, and the high-voltage socket comprises a base, a light-emitting diode and a photosensitive diode. Wherein the light emitting diode and the photosensitive diode are oppositely arranged on the fixing frame of the base, and the light emitting diode can emit light outwards. When the high-voltage connector is inserted into the insertion hole in the base, the high-voltage connector shields light emitted by the light-emitting diode, at the moment, the photosensitive diode is not conducted, the voltage acquisition module acquires the rise of the voltage value of the front end of the photosensitive diode, and then successful insertion of the high-voltage connector and the insertion hole in the base is rapidly and accurately judged. Therefore, high-voltage safety is guaranteed, judgment logic is simple, and the high-voltage socket is simple in structure. The utility model further provides a high-voltage interlocking system, a high-voltage interlocking signal detection loop in the high-voltage interlocking system comprises the high-voltage socket, and high-voltage interlocking fault detection efficiency and accuracy are high.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to a high-voltage socket and a high-voltage interlocking system. Background Art

[0002] A key feature that distinguishes electric vehicles from traditional vehicles is their high-voltage, high-current high-voltage circuits. The voltage of an electric vehicle's powertrain typically exceeds 300V, far exceeding the safe voltage range. Therefore, for the sake of high-voltage safety, monitoring of the high-voltage circuits within electric vehicles is essential, and high-voltage interlocking is a key component of this monitoring. Currently, common high-voltage interlock detection methods include PWM wave high-voltage interlock detection and constant current source high-voltage interlock detection. These methods determine whether the high-voltage socket and high-voltage connector are properly connected and whether the high-voltage circuit is conductive.

[0003] The core idea of the PWM wave high-voltage interlock detection method is to use pulse width modulation technology to send signals and detect the duty cycle of the PWM signal in real time on another interface to determine whether the high-voltage interlock is disconnected. The PWM wave high-voltage interlock detection method has the following disadvantages: First, in a high-noise environment, the PWM signal may be subject to electromagnetic interference, resulting in misjudgment of the interlock state, and the signal interference is more serious; Second, when an interlock fault is detected using the PWM wave high-voltage interlock detection method, it is difficult to quickly determine the specific location of the fault, especially in complex circuits with multiple connection points and components; Third, if the PWM signal loop is short-circuited to ground or power, the PWM wave may not return correctly, resulting in an inability to accurately detect the interlock state; Fourth, accurate detection of the PWM signal requires precise time synchronization. If there is a time asynchrony problem in the system, it may affect the judgment of the interlock state.

[0004] The basic principle of constant current source high-voltage interlock detection is to send a high-level or low-level signal to the detection unit through a hardware interface, while simultaneously detecting the potential of another interface in real time to determine whether the high-voltage interlock is disconnected. This constant current source high-voltage interlock detection method has the following disadvantages: 1. When a fault is detected using this method, it is difficult to quickly locate the specific location of the fault, especially in complex systems; 2. The constant current source circuit requires regular maintenance and calibration to ensure its long-term stability and accuracy, resulting in high maintenance requirements; 3. Constant current source detection has limitations in detection speed and a long response time, especially in systems that require real-time or rapid response. Utility Model Content

[0005] The purpose of the utility model is to provide a high-voltage socket and a high-voltage interlocking system, which have a simple structure and can quickly locate the specific location of a plug-in fault in a high-voltage circuit, thereby ensuring the high-voltage safety of the entire vehicle, personnel and the surrounding environment.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In one aspect, the present invention provides a high-voltage socket, comprising:

[0008] A base, wherein the base is provided with a fixing frame and a plug hole; the plug hole is used to connect with a high-voltage connector;

[0009] A light emitting diode is provided on the fixing frame, and the light emitting diode is connected to a power supply circuit;

[0010] A photosensitive diode is arranged on a side of the fixing frame opposite to the light-emitting diode, and the photosensitive diode is connected to a high-voltage interlock signal detection circuit.

[0011] Optionally, the base further includes two light shielding plates, the two light shielding plates are respectively located on both sides of the light emitting diode, and the two light shielding plates are respectively located on both sides of the photosensitive diode.

[0012] Optionally, there are two plugging holes, and the light emitting diode and the photosensitive diode are located between the two plugging holes.

[0013] Optionally, the light emitting diode is detachably mounted on the fixing frame via a first connecting member;

[0014] Alternatively, the light emitting diode is adhered to the fixing frame.

[0015] Optionally, the photodiode is detachably mounted on the fixing frame via a second connecting member;

[0016] Alternatively, the photodiode is adhered to the fixing frame.

[0017] On the other hand, the utility model provides a high-voltage interlocking system, including a microcontroller, a power supply circuit and a high-voltage interlocking signal detection circuit, wherein the high-voltage interlocking signal detection circuit includes the high-voltage socket in any of the above-mentioned schemes, and the power supply circuit and the high-voltage interlocking signal detection circuit are both connected to the microcontroller.

[0018] Optionally, there are multiple high-voltage sockets, the microcontroller includes a voltage acquisition module, the voltage acquisition module is provided with multiple first interfaces, each of the first interfaces is connected to a high-voltage interlock signal detection circuit, and the photosensitive diode of the high-voltage socket, the high-voltage interlock signal detection circuit and the first interface correspond one to one.

[0019] Optionally, the high-voltage interlock signal detection circuit includes a first power supply terminal, a first ground terminal and a voltage divider resistor, the voltage divider resistor and the photosensitive diode are connected in series between the first power supply terminal and the first ground terminal, and the first interface is connected downstream of the voltage divider resistor and upstream of the photosensitive diode.

[0020] Optionally, the microcontroller includes a battery management module, the battery management module includes a second interface, and the power supply circuit is connected to the second interface.

[0021] Optionally, the power supply circuit includes a second power supply end, a second grounding end and a protective resistor, the second interface is connected to the second power supply end, and the protective resistor and the light-emitting diodes of multiple high-voltage sockets are connected in series between the second power supply end and the second grounding end.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides a high-voltage socket, comprising a base, a light-emitting diode, and a photosensitive diode. The base is provided with a fixing frame and a plug-in hole, and the plug-in hole is used to connect to a high-voltage connector. The light-emitting diode and the photosensitive diode are both arranged on the fixing frame, and the light-emitting diode and the photosensitive diode are arranged opposite to each other on the fixing frame. The light-emitting diode can emit light outward. When the high-voltage connector is not inserted into the plug-in hole on the base, the photosensitive diode can receive the light (i.e., the light signal) emitted by the light-emitting diode. At this time, the photosensitive diode is turned on, and the voltage value collected by the voltage acquisition module at the front end of the photosensitive diode is a first voltage. When the high-voltage connector is inserted into the plug-in hole on the base, the high-voltage connector blocks the light emitted by the light-emitting diode. At this time, the photosensitive diode is not turned on, and the voltage value collected by the voltage acquisition module at the front end of the photosensitive diode is a second voltage, which is higher than the first voltage. The voltage acquisition module determines whether the photosensitive diode is turned on by monitoring the change in the voltage value at the front end of the photosensitive diode, and further determines whether the high-voltage connector is successfully plugged into the plug-in hole on the base. Therefore, it is possible to quickly and accurately determine whether there is an abnormality in the high-voltage interlock signal detection circuit, ensuring high voltage safety, and the judgment logic is simple and the structure of the high-voltage socket is simple.

[0024] The utility model also provides a high-voltage interlock system, comprising a microcontroller, a power supply circuit, and a high-voltage interlock signal detection circuit. The high-voltage interlock signal detection circuit includes the high-voltage socket described above, and both the power supply circuit and the high-voltage interlock signal detection circuit are connected to the microcontroller. This high-voltage interlock system can quickly and accurately locate the location where the high-voltage socket and the high-voltage connector are disconnected in the high-voltage interlock signal detection circuit, thereby improving the efficiency and accuracy of high-voltage interlock fault detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 It is a structural diagram of a high-voltage socket provided in an embodiment of the present utility model;

[0027] Figure 2 It is a structural diagram of the high-voltage interlocking system provided in an embodiment of the present utility model.

[0028] In the picture:

[0029] 10. Microcontroller; 11. First interface; 12. Second interface; 20. Power supply circuit; 21. Second power supply terminal; 22. Second ground terminal; 23. Protection resistor; 30. High-voltage interlock signal detection circuit; 31. First power supply terminal; 32. First ground terminal; 33. Voltage divider resistor; 100. Base; 110. Fixing frame; 120. Plug hole; 130. Sunshade; 200. Light-emitting diode; 300. Photodiode. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0031] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0034] like Figure 1 As shown, this embodiment provides a high-voltage socket, which includes a base 100, a light-emitting diode 200, and a photosensitive diode 300. The base 100 is provided with a fixing frame 110 and a plug hole 120, and the plug hole 120 is used to connect to a high-voltage connector. The light-emitting diode 200 and the photosensitive diode 300 are both arranged on the fixing frame 110, and the light-emitting diode 200 and the photosensitive diode 300 are arranged opposite each other on the fixing frame 110. The light-emitting diode 200 is connected to the power supply circuit 20, and the power supply circuit 20 can be used to power the light-emitting diode 200 so that the light-emitting diode 200 can emit light outward. The photosensitive diode 300 is connected to the high-voltage interlock signal detection circuit 30, and the high-voltage interlock signal detection circuit 30 is connected to the voltage acquisition module. When the high-voltage connector is not inserted into the socket 120 on the base 100, the photodiode 300 can receive the light (i.e., the optical signal) emitted by the light-emitting diode 200, and the photodiode 300 can convert the optical signal into an electrical signal. At this time, the photodiode 300 is turned on, and the voltage value collected by the voltage collection module at the front end of the photodiode 300 is a first voltage, and the first voltage is relatively low at this time; when the high-voltage connector is inserted into the socket 120 on the base 100, the high-voltage connector blocks the light emitted by the light-emitting diode 200. At this time, the photodiode 300 cannot receive the optical signal emitted by the light-emitting diode 200, and the photodiode 300 is not turned on. The voltage value collected by the voltage collection module at the front end of the photodiode 300 is a second voltage, and the second voltage is higher than the first voltage.

[0035] By monitoring the voltage change at the front end of the photodiode 300, it is determined whether the photodiode 300 is conducting, and further whether the high-voltage connector is successfully plugged into the socket 120 on the base 100. When the voltage at the front end of the photodiode 300 is high, it can be determined that the high-voltage interlock signal detection circuit 30 is normal, and the high-voltage connector is successfully plugged into the socket 120 on the base 100. When the voltage at the front end of the photodiode 300 is low, it can be determined that the high-voltage interlock signal detection circuit 30 is abnormal, and the high-voltage connector is disconnected from the high-voltage socket. This allows for quick and accurate determination of whether the high-voltage interlock signal detection circuit 30 is abnormal, ensuring high voltage safety. The determination logic is simple, and the high-voltage socket structure is simple.

[0036] Continue to see Figure 1 In this embodiment, two light shields 130 are provided on the base 100. These light shields 130 are located on either side of the LED 200, and on either side of the photodiode 300. The provision of the light shields 130 allows the light emitted by the LED 200 to be more focused, preventing divergence that could affect the accuracy of the optical signal received by the photodiode 300. Furthermore, the provision of the light shields 130 requires a corresponding clearance on the high-voltage connector. This clearance allows the light shields 130 to pass through, ensuring smooth insertion of the high-voltage connector plug into the receptacle 120 and maintaining connectivity in the vehicle's high-voltage circuit.

[0037] Furthermore, the base 100 is provided with two insertion holes 120, and the high-voltage connector is also provided with two plugs. The insertion holes 120 and the plugs correspond one to one, and the light-emitting diode 200 and the photodiode 300 are located between the two insertion holes 120. When the plug of the high-voltage connector is inserted into the corresponding insertion hole 120, the main body of the high-voltage connector will block the light between the light-emitting diode 200 and the photodiode 300, and the photodiode 300 cannot receive the light signal. The voltage acquisition module detects that the voltage value at the front end of the photodiode 300 is the second voltage, and thus determines that the high-voltage interlock signal detection circuit 30 is normal at this time, and the high-voltage connector and the high-voltage socket are properly connected.

[0038] As an optional solution, the light-emitting diode 200 in this embodiment is detachably mounted on the fixing frame 110 via a first connecting member. For example, the first connecting member may be a screw or bolt, etc., with first fixing ears provided on both sides of the light-emitting diode 200, each having a first through-hole provided on the first fixing ear. The screw or bolt passes through the first through-hole and is threadedly connected to the first threaded hole on the base 100, thereby securing the light-emitting diode 200 to the fixing frame 110. Furthermore, the photosensitive diode 300 is detachably mounted on the fixing frame 110 via a second connecting member. For example, the second connecting member may be a screw or bolt, etc. with second fixing ears provided on both sides of the photosensitive diode 300, each having a second through-hole provided on the second fixing ear. The screw or bolt passes through the second through-hole and is threadedly connected to the second threaded hole on the base 100, thereby securing the photosensitive diode 300 to the fixing frame 110. By adopting the above-mentioned detachable installation method, the LED 200 and the photosensitive diode 300 can be flexibly disassembled and assembled on the fixing frame 110. When problems occur with the LED 200 and the photosensitive diode 300, new LEDs 200 and photosensitive diodes 300 can be replaced at any time.

[0039] Of course, in other embodiments, the LED 200 can be glued to the fixing frame 110. The photodiode 300 can also be glued to the fixing frame 110. In this embodiment, the LED 200 and the photodiode 300 are not easily removed from the fixing frame 110. However, the advantage of this embodiment is that the LED 200 and the photodiode 300 are more firmly fixed to the fixing frame 110.

[0040] This embodiment also provides a high voltage interlocking system, see Figure 2 The high-voltage interlock system includes a microcontroller 10, a power supply circuit 20, and a high-voltage interlock signal detection circuit 30. The high-voltage interlock signal detection circuit 30 includes the high-voltage socket described above. Both the power supply circuit 20 and the high-voltage interlock signal detection circuit 30 are connected to the microcontroller 10. The high-voltage interlock system can quickly and accurately locate the position where the high-voltage socket and the high-voltage connector are disconnected in the high-voltage interlock signal detection circuit 30, thereby improving the efficiency and accuracy of high-voltage interlock fault detection.

[0041] The high-voltage interlocking system is provided with multiple high-voltage sockets. Here, three high-voltage sockets are used as an example for explanation. The microcontroller 10 includes a voltage acquisition module. The voltage acquisition module is provided with multiple first interfaces 11 ( Figure 2GP101, GP102, and GP103 in the figure), each first interface 11 is connected to a high-voltage interlock signal detection circuit 30, and the photodiode 300 of the high-voltage socket, the high-voltage interlock signal detection circuit 30, and the first interface 11 have a one-to-one correspondence. Thus, the voltage acquisition module can simultaneously and individually obtain the voltage value at the front end of the photodiode 300 of the high-voltage socket in each high-voltage interlock signal detection circuit 30, and determine the connection status of the high-voltage socket and the high-voltage connector based on this voltage value, thereby achieving independent high-voltage interlock detection and quickly determining the specific location of the fault in the connection between the high-voltage socket and the high-voltage connector. This implementation scheme has more obvious advantages in complex high-voltage circuits.

[0042] Optionally, each high-voltage interlock signal detection circuit 30 includes a first power supply terminal 31, a first ground terminal 32, and a voltage-dividing resistor 33. The voltage-dividing resistor 33 and a photodiode 300 are connected in series between the first power supply terminal 31 and the first ground terminal 32. The first interface 11 is connected downstream of the voltage-dividing resistor 33 and upstream of the photodiode 300. Here, an example is used in which the supply voltage of the first power supply terminal 31 is 5V and the resistance values of the voltage-dividing resistor 33 and the photodiode 300 are equal. When the photodiode 300 receives the light emitted by the light-emitting diode 200, the circuit between the first power supply terminal 31 and the first ground terminal 32 is connected. At this time, the voltage value of the front end of the photodiode 300 of the high-voltage socket collected by the voltage acquisition module is a first voltage, which is 2.5V. The voltage acquisition module determines that there is a connection failure between the high-voltage socket and the high-voltage connector in the high-voltage interlock signal detection circuit 30 based on the voltage value detected at the front end of the photodiode 300; when the photodiode 300 does not receive the light emitted by the light-emitting diode 200, the circuit between the first interface 11 and the first ground terminal 32 is not conductive. The voltage value of the front end of the photodiode 300 of the high-voltage socket collected by the voltage acquisition module is a second voltage, which is 5V. The voltage acquisition module determines that the high-voltage socket and the high-voltage connector in the high-voltage interlock signal detection circuit 30 are well connected based on the voltage value detected at the front end of the photodiode 300, and the high-voltage circuit of the vehicle is normal.

[0043] Furthermore, in this embodiment, the microcontroller 10 includes a battery management module, and the battery management module includes a second interface 12 ( Figure 2 GP100 in the figure), the power supply circuit 20 is connected to the second interface 12.

[0044] Optionally, the power supply circuit 20 includes a second power supply terminal 21, a second ground terminal 22, and a protective resistor 23. The second interface 12 is connected to the second power supply terminal 21. The protective resistor 23 and the LEDs 200 of the multiple high-voltage sockets are connected in series between the second power supply terminal 21 and the second ground terminal 22. It should be noted that each high-voltage socket is equipped with an LED 200 and a photodiode 300, with each LED 200 corresponding to a photodiode 300. Since there are three high-voltage sockets, there are also three LEDs 200 here. When the voltage acquisition module begins detecting the high-voltage interlock, the second interface 12 is connected to the power supply circuit 20. At this time, the second power supply terminal 21 provides power to the multiple LEDs 200, and the multiple LEDs 200 emit light simultaneously. In other words, if any LED 200 fails, the circuit between the second power supply terminal 21 and the second ground terminal 22 is disconnected, and the multiple LEDs 200 cannot emit light. This ensures that the on / off states of the LEDs 200 in multiple high-voltage sockets are consistent. In this case, if the photodiode 300 cannot receive the light emitted by the light-emitting diode 200, it means that the high-voltage socket and the high-voltage connector are well connected, and the high-voltage interlock signal detection circuit 30 is normal; if the photodiode 300 can receive the light emitted by the light-emitting diode 200, it means that the high-voltage socket and the high-voltage connector are poorly connected, the high-voltage socket and the high-voltage connector are disconnected, and the high-voltage interlock signal detection circuit 30 is abnormal. At this time, the voltage value at the front end of each photodiode 300 collected by the voltage acquisition module can specifically determine which high-voltage socket and high-voltage connector connection has a fault. In a complex high-voltage circuit, the fault location can be quickly and accurately located, which has obvious advantages.

[0045] Obviously, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

[0046] Note that throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. Throughout this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A high voltage socket, characterized in that: include: A base, wherein the base is provided with a fixing frame and a plug hole; the plug hole is used to connect with a high-voltage connector; A light emitting diode is provided on the fixing frame, and the light emitting diode is connected to a power supply circuit; A photosensitive diode is arranged on a side of the fixing frame opposite to the light-emitting diode, and the photosensitive diode is connected to a high-voltage interlock signal detection circuit.

2. The high-voltage socket according to claim 1, characterized in that: The base further includes two light shielding plates, which are respectively located on both sides of the light emitting diode, and the two light shielding plates are respectively located on both sides of the photosensitive diode.

3. The high voltage socket according to claim 1, characterized in that: There are two plugging holes, and the light emitting diode and the photosensitive diode are located between the two plugging holes.

4. The high voltage socket according to claim 1, characterized in that: The light emitting diode is detachably mounted on the fixing frame via a first connecting member; Alternatively, the light emitting diode is adhered to the fixing frame.

5. The high voltage socket according to claim 1, characterized in that: The photodiode is detachably mounted on the fixing frame via a second connecting member; Alternatively, the photodiode is adhered to the fixing frame.

6. A high voltage interlocking system, characterized in that: It includes a microcontroller, a power supply circuit and a high-voltage interlock signal detection circuit, the high-voltage interlock signal detection circuit includes the high-voltage socket according to any one of claims 1 to 5, and the power supply circuit and the high-voltage interlock signal detection circuit are both connected to the microcontroller.

7. The high voltage interlock system according to claim 6, characterized in that: There are multiple high-voltage sockets, the microcontroller includes a voltage acquisition module, the voltage acquisition module is provided with multiple first interfaces, each of the first interfaces is connected to a high-voltage interlock signal detection circuit, and the photosensitive diode of the high-voltage socket, the high-voltage interlock signal detection circuit and the first interface correspond one to one.

8. The high voltage interlocking system according to claim 7, characterized in that: The high-voltage interlock signal detection circuit includes a first power supply end, a first ground end and a voltage divider resistor. The voltage divider resistor and the photosensitive diode are connected in series between the first power supply end and the first ground end. The first interface is connected downstream of the voltage divider resistor and upstream of the photosensitive diode.

9. The high voltage interlock system according to claim 7, characterized in that: The microcontroller includes a battery management module, the battery management module includes a second interface, and the power supply circuit is connected to the second interface.

10. The high voltage interlock system according to claim 9, characterized in that: The power supply circuit includes a second power supply end, a second grounding end and a protective resistor. The second interface is connected to the second power supply end. The protective resistor and the light-emitting diodes of the multiple high-voltage sockets are connected in series between the second power supply end and the second grounding end.

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