Direct current converter with locking and safe power-off functions

Abstract

The invention relates to the technical field of direct-current converters, and discloses a direct-current converter with locking and safe power-off functions, which comprises an adapter, a plurality of first jacks are formed in the side wall of the adapter, first terminals are arranged in the first jacks of the adapter, a shell is arranged on one side of the adapter, a first groove is formed in the top end of the outer wall of the shell, and a second groove is formed in the top end of the outer wall of the shell. A first plug pin is rotationally connected into a first groove of the shell, a first pressing rod is arranged on the outer wall of the first plug pin, a first wedge block is fixedly arranged at the bottom of one end of the first pressing rod, the other end of the first pressing rod is slidably connected with a locking mechanism, and a first spring is arranged on one side of the bottom end of the first pressing rod. Secondary locking is achieved through supporting of the operation block on the top column and clamping of the second wedge-shaped block into the hook groove, it is powerfully guaranteed that the adapter and the charging port are stably connected, the adapter cannot fall off when a vehicle is collided or pulled by a cable, the problem that a traditional adapter is prone to loosening and falling off is effectively solved, and continuous charging is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of direct current converters, in particular to a direct current converter with locking and safe power-off functions. Background Art

[0002] With the rapid popularization of electric vehicles, their charging technology and equipment have attracted much attention. Current charging adapters have safety hazards. During the charging process, most traditional adapters rely on simple plug-in connections and lack an effective locking mechanism. When they are pulled by external forces, the adapters are easy to fall off the charging interface of the electric vehicle, which will not only interrupt the charging process and affect the charging efficiency, but also may cause electric sparks due to the momentary interruption of electrical connection, causing damage to the equipment and even endangering the safety of people around. When the adapter needs to be unplugged at the end of charging, existing adapters often do not have perfect safety power-off measures. Since the electric vehicle battery stores a large amount of electrical energy during the charging process, if the adapter is directly unplugged in the charged state, the strong current shock can easily cause electrical failures, short circuits, fires and other serious accidents, posing a huge threat to the safety of users' lives and property. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a DC converter with locking and safe power-off functions, which solves the problem that the charging adapter is easy to fall off during the charging process and there are safety hazards when unlocking.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a DC converter with locking and safety power-off functions, comprising an adapter, a side wall of the adapter is provided with a plurality of jacks 1, a terminal 1 is arranged inside the jack 1 of the adapter, a shell is arranged on one side of the adapter, a groove 1 is arranged at the top of the outer wall of the shell, a plug 1 is rotatably connected in the groove 1 of the shell, a push rod 1 is arranged on the outer wall of the plug 1, a wedge block 1 is fixedly arranged at the bottom of one end of the push rod 1, a locking mechanism is slidably connected to the other end of the push rod 1, a spring 1 is arranged on one side of the bottom end of the push rod 1, the bottom end of the spring 1 is arranged in the groove 1 of the shell, a hook groove is arranged on one side of the middle part of the shell, a plurality of jacks 2 are arranged on the side wall of the shell, and a terminal 2 is arranged inside the jack 2.

[0005] Preferably, the locking mechanism includes an operating block, both sides of which are slidably connected to one end of a push rod, a top of the operating block is provided with a groove 2, a latch 2 is rotatably connected in the groove 2 of the operating block, a push rod 2 is provided on the outer wall of the latch 2, a spring 2 is provided at one end of the bottom of the push rod 2, and the bottom end of the spring 2 is fixedly set in the groove 2 of the operating block.

[0006] Preferably, a wedge-shaped block 2 is fixedly provided at the other end of the bottom of the push rod 2, and the wedge-shaped block 2 is located above the hook groove. A slide groove is provided at the bottom end of the operating block, and a top column is slidably connected in the slide groove of the operating block, and the bottom end of the top column is fixedly provided in a groove 1 of the outer shell.

[0007] Preferably, a safety power-off module is installed inside the shell, and the safety power-off module includes a conversion module, a current detection module, a control module, and a relay. The conversion module is used for voltage conversion and current adaptation. The current detection module is used to monitor the charging current in real time and transmit the detected current signal to the control module. The control module is used to receive the signal of the current detection module and determine whether a power-off operation is required based on the signal. The relay is used to realize the on-off control of the circuit, receive the signal and cut off or connect the circuit according to the instruction.

[0008] Preferably, the safety power-off module is used to receive electrical signals sent by the conversion module, the current detection module, the control module, and the relay, and detect the charging current.

[0009] Preferably, the current detection module includes a Hall sensor and a signal conditioning unit, wherein the Hall sensor is used to detect the current in the charging circuit and convert the current signal into an electrical signal, and the signal conditioning unit is used to amplify and filter the weak electrical signal output by the Hall sensor to make the signal more accurate.

[0010] Preferably, the control module includes a central processing unit and a signal receiving unit, the signal receiving unit is used to receive the current signal transmitted by the current detection module and provide data to the central processing unit, and the central processing unit is used to analyze and judge according to the current signal transmitted by the signal receiving unit, and control the relay to be turned on and off.

[0011] Preferably, the relay includes a switch indicator light, an electromagnetic drive module, and a circuit on-off module. The switch indicator light is used to intuitively display the working status of the relay to understand whether the circuit is in an on or off state. The electromagnetic drive module is used to receive instructions from the control module and generate electromagnetic force to drive the circuit on-off module. The circuit on-off module is used to control the on and off of the charging circuit according to the drive of the electromagnetic drive module.

[0012] Working principle: When charging, first connect the external power supply, insert the adapter plug into the second socket, and the second terminal contacts it to turn on the power. Then insert the adapter into the charging port of the electric vehicle, and the socket one and the terminal one assist in guiding. During the insertion process, the inner wall of the charging port squeezes the wedge block one at the bottom of the push rod one, so that the push rod one rotates with the pin one as the axis, and the spring one is compressed, driving the locking mechanism connected to it. The two sides of the operating block slide on the push rod one. When it moves to a certain position, the top column in the bottom slide of the operating block supports the operating block, making it unable to be pressed. At the same time, the wedge block two at the bottom of the push rod two is stuck into the hook groove under the action of the second spring, realizing secondary locking and stable connection. During the entire charging process, the current detection module plays a key role. The Hall sensor detects the current of the charging line and converts it into an electrical signal. The signal conditioning unit amplifies and filters the weak signal and transmits it to the control module. The signal receiving unit receives the signal, and the central processing unit analyzes it according to the preset program and threshold. If the current is abnormal, it sends a command to the relay. The electromagnetic drive module receives instructions to generate electromagnetic force, drives the circuit on / off module to operate, and the switch indicator light synchronously displays the circuit status, achieving fast and safe power off to ensure safe and stable charging.

[0013] The present invention provides a DC converter with locking and safe power-off functions. It has the following beneficial effects: 1. The present invention realizes secondary locking by clamping the operating block on the top column support and the wedge-shaped block into the hook groove, which effectively ensures that the adapter is firmly connected to the charging port. Even if the vehicle is hit or the cable is pulled, it cannot fall off, effectively solving the problem of the traditional adapter being easy to loosen and fall off, and ensuring continuous charging.

[0014] 2. The safety power-off module of the present invention effectively avoids damage to the battery due to voltage and current mismatch through the coordinated cooperation of various parts. It can promptly detect current abnormalities during charging and quickly cut off power to prevent dangers such as overheating and overload, greatly improving the safety and stability of charging and its adaptability to different charging scenarios.

[0015] 3. The present invention uses a Hall sensor, a signal conditioning unit, a central processing unit, a signal receiving unit, a switch indicator light, an electromagnetic drive module, and a circuit on-off module, so that the current situation during charging can be clearly observed, abnormalities can be dealt with in a timely manner, and the circuit status is clear at a glance, which greatly improves the safety, stability and overall convenience of charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front perspective schematic diagram of the present invention; Figure 2 It is a three-dimensional schematic diagram of a local structure of a push rod of the present invention; Figure 3 It is a three-dimensional cross-sectional view of the local structure of the shell of the present invention; Figure 4It is a three-dimensional schematic diagram of the local structure of the operating block of the present invention; Figure 5 This is a system module architecture diagram of the safety power-off module of the present invention; Figure 6 This is a system module architecture diagram of the current detection module of the present invention; Figure 7 This is a system module architecture diagram of the control module of the present invention; Figure 8 This is a module architecture diagram of the relay system of the present invention.

[0017] Among them, 1. adapter; 2. socket one; 3. terminal one; 4. housing; 5. lever one; 6. operating block; 7. lever two; 8. socket two; 9. terminal two; 10. wedge block one; 11. latch one; 12. spring one; 13. latch two; 14. wedge block two; 15. top column; 16. hook slot; 17. safety power-off module; 18. conversion module; 19. current detection module; 20. control module; 21. relay; 22. switch indicator light; 23. electromagnetic drive module; 24. circuit on-off module; 25. Hall sensor; 26. signal conditioning unit; 27. central processing unit; 28. signal receiving unit; 29. ​​spring two. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] Please see attached Figure 1 -Attached Figure 4The embodiment of the present invention provides a DC converter with locking and safety power-off functions, including an adapter 1, a side wall of the adapter 1 is provided with a plurality of jacks 2, a terminal 3 is arranged inside the jack 2 of the adapter 1, a shell 4 is arranged on one side of the adapter 1, a groove 1 is arranged on the top of the outer wall of the shell 4, a plug 11 is rotatably connected in the groove 1 of the shell 4, a push rod 5 is arranged on the outer wall of the plug 11, a wedge block 10 is fixedly arranged at the bottom of one end of the push rod 5, a locking mechanism is slidably connected to the other end of the push rod 5, a spring 12 is arranged on one side of the bottom end of the push rod 5, the bottom end of the spring 12 is arranged in the groove 1 of the shell 4, a hook groove 16 is arranged on one side of the middle part of the shell 4, and a side wall of the shell 4 is provided with a spring 12. A plurality of sockets 8 are arranged, and terminals 9 are arranged inside the sockets 8; the locking mechanism includes an operating block 6, both sides of the operating block 6 are slidably connected to one end of a push rod 5, a groove 2 is arranged at the top of the operating block 6, a latch 13 is rotatably connected in the groove 2 of the operating block 6, a push rod 7 is arranged on the outer wall of the latch 13, a spring 29 is arranged at one end of the bottom of the push rod 7, the bottom end of the spring 29 is fixedly arranged in the groove 2 of the operating block 6, a wedge block 14 is fixedly arranged at the other end of the bottom of the push rod 7, the wedge block 14 is located above the hook groove 16, a slide groove is arranged at the bottom end of the operating block 6, a top column 15 is slidably connected in the slide groove of the operating block 6, and the bottom end of the top column 15 is fixedly arranged in the groove 1 of the housing 4.

[0020] Specifically, when charging starts, the charging pile plug is inserted into the socket 2 8, and the terminal 2 9 in the socket 2 8 contacts the corresponding part of the plug, so that the electric energy is connected to the adapter. Then the adapter 1 is aligned with the charging port of the electric vehicle and inserted. At this time, the socket 1 2 and the terminal 1 3 on the side wall of the adapter 1 play an auxiliary guiding role. During the insertion process, the inner wall of the charging port of the electric vehicle contacts the wedge block 10 at the bottom of one end of the push rod 1 5. Because the pin 11 is connected to the groove 1 of the housing 4, the push rod 1 5 rotates with the pin 11 as the axis, and the spring 12 on one side of the bottom end of the push rod 1 5 is compressed. When the push rod 5 reaches a specific position, mechanical locking is achieved. This locking method is an existing structure, which can ensure that the adapter is firmly connected to the charging port of the electric vehicle. The push rod 5 rotates to drive the operating block 6. Because its two sides are slidingly connected to one end of the push rod 5, the operating block 6 moves accordingly. A slide groove is provided at the bottom end of the operating block 6. As the operating block 6 moves, its bottom slide groove is slidingly connected to the top column 15. At this time, the top column 15 supports the operating block 6, effectively preventing the operating block 6 from being accidentally pressed, thereby ensuring the stability of the locking structure. When the adapter 1 goes further into the charging port of the electric vehicle, the operating block 6 continues to slide following the rotation of the push rod 5 until it slides to the top of the top column 15. At this time, the wedge block 14 at the other end of the bottom of the push rod 7 is pushed by the elastic force of the spring 29 and is inserted into the hook groove 16 to achieve secondary locking, which greatly enhances the firmness of the connection between the adapter and the charging port of the electric vehicle. When the charging is completed and the locked state needs to be released, the push rod 7 is pressed, the spring 29 is compressed, and the wedge block 14 rises and disengages from the hook groove 16.

[0021] The locking mechanism allows a stable connection between the adapter and the interface, which can buffer the impact force and maintain structural stability. The stable connection between the adapter and the interface ensures a stable charging process and avoids tedious operations such as charging interruption and reconnection due to loose connection. This solves the problem of traditional charging adapters falling off from the charging interface due to external interference due to the lack of locking means during charging, ensuring a smooth and safe charging process.

[0022] Please see attached Figure 1 , Attachment Figure 5 -Attached Figure 8 A safety power-off module 17 is installed inside the housing 4. The safety power-off module 17 includes a conversion module 18, a current detection module 19, a control module 20, and a relay 21. The conversion module 18 is used for voltage conversion and current adaptation. The current detection module 19 is used to monitor the charging current in real time and transmit the detected current signal to the control module 20. The control module 20 is used to receive the signal of the current detection module 19 and determine whether a power-off operation is required based on the signal. The relay 21 is used to realize the on-off control of the circuit, receive the signal and cut off or connect the circuit according to the instruction. The safety power-off module 17 is used to receive the electrical signals sent by the conversion module 18, the current detection module 19, the control module 20, and the relay 21, and detect the charging current.

[0023] Specifically, during the charging process of the electric vehicle, the conversion module 18 is connected to an external power supply, and the voltage and current characteristics of the output of different charging piles are quickly and accurately converted to adapt to the battery charging needs of the electric vehicle, and the current is adjusted to an appropriate size to ensure that the electric energy can be input stably and efficiently. The current detection module 19 monitors the charging current in real time throughout the whole process, continuously captures the current value, and transmits the detected current signal to the control module 20 as soon as possible. After the control module 20 receives the signal from the current detection module 19, it immediately analyzes and judges according to the preset program and threshold. When it is detected that the current suddenly increases significantly and exceeds the safe charging current range that the electric vehicle battery can withstand, the control module 20 responds quickly and sends a command to the relay 21. After the relay 21 receives the command from the control module 20, the electromagnetic drive module 23 inside it drives the circuit on-off module 24 to operate. If the instruction is to cut off the power, the circuit on-off module 24 immediately cuts off the circuit to prevent excessive or unstable current from continuing to flow into the electric vehicle battery; if the instruction is to restore the power supply, under the premise of ensuring safety, the circuit on-off module 24 reconnects the circuit to ensure normal charging, and the safety power-off module 17 as a whole integrates the information interaction between the conversion module 18, the current detection module 19, the control module 20, and the relay 21, continuously receives the electrical signals sent by each module, detects the charging current in real time, and ensures the electrical safety of the charging process.

[0024] The relay 21 can quickly realize the circuit on and off. When there is a situation that endangers the charging safety, the circuit is instantly cut off to prevent the danger from further expanding, and effectively protect the safety of the electric vehicle battery, charging equipment and the surrounding environment. When the charging line fails, the power is not cut off in time, which causes serious consequences. The relay 21 quickly cuts off the circuit according to the instruction to ensure the safety of charging.

[0025] Please see attached Figure 5 -Attached Figure 8The current detection module 19 includes a Hall sensor 25 and a signal conditioning unit 26. The Hall sensor 25 is used to detect the current size in the charging circuit and convert the current signal into an electrical signal. The signal conditioning unit 26 is used to amplify and filter the weak electrical signal output by the Hall sensor 25 and make the signal more accurate. The control module 20 includes a central processing unit 27 and a signal receiving unit 28. The signal receiving unit 28 is used to receive the current signal transmitted by the current detection module 19 and provide data for the central processing unit 27. The central processing unit 27 is used to analyze and judge according to the current signal transmitted by the signal receiving unit 28, and control the relay 21 to switch on and off. The relay 21 includes a switch indicator light 22, an electromagnetic drive module 23, and a circuit on-off module 24. The switch indicator light 22 is used to intuitively display the working state of the relay 21 to understand whether the circuit is in an on or off state. The electromagnetic drive module 23 is used to receive the instruction of the control module 20 and generate electromagnetic force to drive the circuit on-off module 24. The circuit on-off module 24 is used to control the on and off of the charging circuit according to the drive of the electromagnetic drive module 23.

[0026] Specifically, when the current passes through the charging circuit, according to the Hall effect principle, the Hall sensor 25 can sense the current size and quickly convert it into an electrical signal corresponding to it. Since the electrical signal output by the Hall sensor 25 is relatively weak and susceptible to interference, the signal conditioning unit 26 uses a special amplification circuit to enhance the strength of the weak electrical signal, and at the same time uses a filtering circuit to filter out interference components such as clutter and noise in the circuit, so that the final output signal is stable, can truly reflect the charging current situation, and accurately transmit it to the control module 20; the signal receiving unit 28 waits for the current signal from the current detection module 19. Once the signal is received, the data is immediately and completely transmitted to the central processing unit 27. The central processing unit 27 has a pre-set program algorithm and safety threshold. After receiving the current signal from the signal receiving unit 28, the central processing unit 27 quickly analyzes and judges the data according to the program. Compare the current current value with the safe charging current range, or observe whether the fluctuation trend of the current is abnormal. If the judgment result shows that the current is abnormal, such as exceeding the safety range, fluctuating too violently, etc., the central processing unit 27 immediately sends a precise control instruction to the relay 21 to decide whether the circuit needs to be cut off or restored; the switch indicator light 22 immediately and intuitively displays when the circuit state changes. When the circuit is connected, the switch indicator light 22 lights up, indicating that the power is transmitted normally; when the circuit is disconnected, the switch indicator light 22 goes out, prompting the user that there is a problem with the charging line or it is in a safety protection state. After receiving the instruction from the control module 20, the electromagnetic drive module 23 generates electromagnetic force according to the principle of electromagnetic induction. This electromagnetic force acts on the circuit on-off module 24 to drive its mechanical structure to move. If the instruction is to cut off the circuit, the circuit on-off module 24 will quickly disconnect the circuit under the push of the electromagnetic force to prevent the current from continuing to flow; if the instruction is to connect the circuit, the circuit on-off module 24 will restore the circuit connection to ensure smooth transmission of power.

[0027] Through the DC converter, accurate current adaptation and monitoring are achieved to ensure signal quality and avoid charging failures. Based on accurate current signals, the module can be quickly and accurately judged and coordinated to ensure the operation of each module. The switch indicator light 22 allows users to know the circuit status and can quickly switch the circuit on and off according to instructions, thus improving the stability of the charging system. This solves the problems of inaccurate current monitoring and signal interference, avoids battery damage, overcomes the drawbacks of delayed manual judgment and inaccurate decision-making, ensures charging safety, solves the dilemma of unclear circuit status and untimely power off, prevents the expansion of danger, and improves the charging experience.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A DC converter with locking and safety power-off functions, comprising an adapter (1), characterized in that: The side wall of the adapter (1) is provided with a plurality of jacks (2), and a terminal (3) is arranged inside the jack (2) of the adapter (1). A shell (4) is provided on one side of the adapter (1), and a groove (1) is provided at the top of the outer wall of the shell (4). A plug (11) is rotatably connected in the groove (1) of the shell (4), and a push rod (5) is provided on the outer wall of the plug (11). A wedge block (10) is fixedly arranged at the bottom of one end of the push rod (5), and a locking mechanism is slidably connected to the other end of the push rod (5). A spring (12) is provided on one side of the bottom end of the push rod (5), and the bottom end of the spring (12) is arranged in the groove (1) of the shell (4). A hook groove (16) is provided on one side of the middle part of the shell (4). The side wall of the shell (4) is provided with a plurality of jacks (8), and a terminal (9) is arranged inside the jack (8).

2. A DC converter with locking and safety power-off functions according to claim 1, characterized in that: The locking mechanism comprises an operating block (6), both sides of which are slidably connected to one end of a push rod (5), a top end of the operating block (6) is provided with a second groove, a second latch (13) is rotatably connected in the second groove of the operating block (6), a second push rod (7) is provided on the outer wall of the second latch (13), a second spring (29) is provided at one end of the bottom of the second push rod (7), and the bottom end of the second spring (29) is fixedly arranged in the second groove of the operating block (6).

3. A DC converter with locking and safety power-off functions according to claim 2, characterized in that: A wedge block 2 (14) is fixedly provided at the other end of the bottom of the second push rod (7), and the wedge block 2 (14) is located above the hook groove (16). A sliding groove is provided at the bottom end of the operating block (6), and a top column (15) is slidably connected in the sliding groove of the operating block (6), and the bottom end of the top column (15) is fixedly provided in a groove 1 of the housing (4).

4. A DC converter with locking and safety power-off functions according to claim 1, characterized in that: A safety power-off module (17) is installed inside the housing (4). The safety power-off module (17) comprises a conversion module (18), a current detection module (19), a control module (20), and a relay (21). The conversion module (18) is used for voltage conversion and current adaptation. The current detection module (19) is used for real-time monitoring of the charging current and transmitting the detected current signal to the control module (20). The control module (20) is used for receiving a signal from the current detection module (19) and determining whether a power-off operation is required based on the signal. The relay (21) is used for realizing on-off control of the circuit, receiving a signal and disconnecting or connecting the circuit based on an instruction.

5. A DC converter with locking and safety power-off functions according to claim 4, characterized in that: The safety power-off module (17) is used to receive electrical signals sent by the conversion module (18), the current detection module (19), the control module (20), and the relay (21), and detect the charging current condition.

6. A DC converter with locking and safety power-off functions according to claim 4, characterized in that: The current detection module (19) comprises a Hall sensor (25) and a signal conditioning unit (26); the Hall sensor (25) is used to detect the magnitude of the current in the charging circuit and convert the current signal into an electrical signal; the signal conditioning unit (26) is used to amplify and filter the weak electrical signal output by the Hall sensor (25) and make the signal more accurate.

7. A DC converter with locking and safety power-off functions according to claim 4, characterized in that: The control module (20) comprises a central processing unit (27) and a signal receiving unit (28), wherein the signal receiving unit (28) is used to receive the current signal transmitted by the current detection module (19) and provide data to the central processing unit (27), and the central processing unit (27) is used to analyze and judge according to the current signal transmitted by the signal receiving unit (28), and control the relay (21) to switch on and off.

8. A DC converter with locking and safety power-off functions according to claim 4, characterized in that: The relay (21) comprises a switch indicator light (22), an electromagnetic drive module (23), and a circuit on-off module (24); the switch indicator light (22) is used to intuitively display the working state of the relay (21) so as to understand whether the circuit is in an on or off state; the electromagnetic drive module (23) is used to receive instructions from the control module (20) and generate electromagnetic force to drive the circuit on-off module (24); and the circuit on-off module (24) is used to control the on-off of the charging circuit according to the drive of the electromagnetic drive module (23).

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