Multistage protection type wire harness middle reverse impact current prevention structure

Abstract

The utility model discloses a multistage protection type wire harness middle anti-reverse-impact current structure comprising an adaptive connection unit, a current monitoring unit is installed in the middle of the adaptive connection unit, an anti-reverse-impact unit is installed on the inner side of the current monitoring unit, the anti-reverse-impact unit comprises two power connection seats, and the power connection seats are connected with the adaptive connection unit. Two first parallel connection electrifying blocks and two second parallel connection electrifying blocks are installed between the two electrifying seats, a piezoresistor, a fuse and a PTC thermistor are installed between the two first parallel connection electrifying blocks, and a diode and an MOS tube are installed between the two second parallel connection electrifying blocks. The two power connection seats, the first parallel connection power connection block and the second parallel connection power connection block are symmetrically installed relative to the PTC thermistor. According to the utility model, the sensitive element in the circuit is protected from being damaged by reverse high voltage or instant large current by limiting sudden change of current in the wire harness or blocking reverse current.

Description

Technical Field

[0001] This utility model relates to the field of overload protection technology, specifically a multi-level protective wire harness intermediate anti-backlash current structure. Background Technology

[0002] Wire harnesses are commonly used for electrical connections between different electrical components. During application, wire harnesses frequently experience inrush currents. Inrush current refers to a transient high-current pulse phenomenon in a circuit caused by sudden events (such as switching operations, motor starting and stopping, lightning, etc.). Its core characteristic is the generation of extremely high current peaks within a short period, which can potentially damage circuit components.

[0003] Existing methods that use adapters to control inrush current within the harness are ineffective and do not meet the requirements for efficient suppression of inrush current. Therefore, we propose a multi-level protective structure for preventing reverse inrush current in the middle of the harness. Utility Model Content

[0004] The purpose of this invention is to provide a multi-level protective structure for preventing back surge current in the middle of a wire harness, in order to solve the problem mentioned in the background art that the existing method of using an adapter to control the surge current in the wire harness is ineffective and does not meet the requirements for efficient blocking of surge current.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-level protective wire harness intermediate anti-backsurge current structure, including an adapter connection unit, a current monitoring unit installed in the middle of the adapter connection unit, an anti-backsurge unit installed inside the current monitoring unit, the anti-backsurge unit including two terminals, two first parallel terminals and a second parallel terminal block installed between the two terminals, a varistor, a fuse and a PTC thermistor installed between the two first parallel terminals, and a diode and a MOSFET installed between the two second parallel terminals. The two terminals, the first parallel terminals and the second parallel terminals are symmetrically installed relative to the PTC thermistor, and the varistor, fuse, PTC thermistor, diode and MOSFET are linearly arranged between the two terminals.

[0006] Preferably, the current monitoring unit includes an insulating box, with cable mounting sleeves fixedly installed at both ends of the insulating box, a sealing cover fixedly installed at the upper end of the insulating box, partition plates fixedly installed on the inner sides of both ends of the insulating box, thermally conductive curing adhesive filling the space between the two partition plates and the two ends of the insulating box, and a support plate fixedly installed between the two partition plates, with a circuit board fixedly installed on the upper surface of the support plate.

[0007] Preferably, the adapter connection unit includes a first connector plug, one end of which is equipped with a conductive cable, and the other end of the conductive cable away from the first connector plug is equipped with two second connector plugs. An adapter is installed between the insulating box and the two second connector plugs. The first connector plug, the insulating box, the adapter, and the two second connector plugs are all fixedly connected by the conductive cable.

[0008] Preferably, the ends of the two electrical connectors furthest from the first parallel electrical block each pass through a partition plate, a thermally conductive curing adhesive, and a cable mounting sleeve, and are electrically connected to a conductive cable. The partition plate is fixedly connected to the electrical connector, and the two partition plates are symmetrically installed relative to the anti-impact unit.

[0009] Preferably, the circuit board is disposed between the support plate and the sealing cover, and both ends of the circuit board are provided with multiple metal pins. The bottom ends of the metal pins penetrate the circuit board and are electrically connected to the power connector. The surface of the circuit board is provided with an electronic ammeter, an electronic voltmeter and a Bluetooth module.

[0010] Preferably, the two terminals of the varistor, fuse and PTC thermistor are connected to each other through a first parallel connection block, and the two terminals of the diode and MOSFET are connected to each other through a second parallel connection block. The varistor, fuse and PTC thermistor are connected in parallel, and the diode and MOSFET are connected in parallel.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention features an electronic ammeter, an electronic voltmeter, and a Bluetooth module on the surface of a circuit board. The electronic ammeter and voltmeter monitor the current and voltage of the two terminals, and the Bluetooth module transmits data. A varistor, fuse, and PTC thermistor reduce the peak value of instantaneous inrush current, preventing damage to electrical components from sudden current changes. A diode and MOSFET block reverse voltage within the conductive cable and keep the electrical components in a cutoff state, effectively preventing reverse current from entering sensitive devices through the conductive cable. The varistor, fuse, and PTC thermistor are connected in parallel, as are the diode and MOSFET, which effectively increase the resistance to reverse current surges and prevent single-circuit failure from causing reverse current surge failure, thus improving the fault tolerance of the circuitry within the conductive cable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the current monitoring unit of this utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the current monitoring unit of this utility model;

[0016] Figure 4 This is an exploded structural diagram of the current monitoring unit of this utility model.

[0017] In the diagram: 1. Adapter connection unit; 101. First connector plug; 102. Conductive cable; 103. Adapter; 104. Second connector plug; 2. Current monitoring unit; 201. Insulating box; 202. Sealing cover; 203. Cable mounting sleeve; 204. Thermally conductive curing adhesive; 205. Separator plate; 206. Circuit board; 207. Support plate; 3. Anti-reflective unit; 301. Terminal block; 302. First parallel terminal block; 303. Second parallel terminal block; 304. Varistor; 305. Fuse; 306. PTC thermistor; 307. Diode; 308. MOSFET. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figure 1 This utility model provides an embodiment of a multi-level protective wire harness intermediate anti-back impact current structure, including an adapter connection unit 1. The adapter connection unit 1 includes a first connection plug 101, one end of which is equipped with a conductive cable 102. The end of the conductive cable 102 away from the first connection plug 101 is equipped with two second connection plugs 104. An adapter 103 is installed between an insulating box 201 and the two second connection plugs 104. The first connection plug 101, the insulating box 201, the adapter 103, and the two second connection plugs 104 are all fixedly connected by the conductive cable 102. Electrical connections are made between different electrical components through the first connection plug 101 and the two second connection plugs 104.

[0020] Please see Figures 1 to 3A current monitoring unit 2 is installed in the middle of the adapter connection unit 1. The current monitoring unit 2 includes an insulating box 201. Cable mounting sleeves 203 are fixedly installed at both ends of the insulating box 201. A sealing cover 202 is fixedly installed at the upper end of the insulating box 201. A partition plate 205 is fixedly installed on the inner side of both ends of the insulating box 201. Thermally conductive curing adhesive 204 is filled between the two partition plates 205 and the two ends of the insulating box 201. A support plate 207 is fixedly installed between the two partition plates 205. A circuit board 206 is fixedly installed on the upper surface of the support plate 207. The circuit board 206 is located between the support plate 207 and the sealing cover 202. Multiple metal pins are provided at both ends of the circuit board 206. The bottom ends of the metal pins penetrate the circuit board 206 and are electrically connected to the power connector 301. An electronic ammeter, an electronic voltmeter and a Bluetooth module are provided on the surface of the circuit board 206. The current and voltage of the two power connectors 301 can be monitored by the electronic ammeter and electronic voltmeter and data can be transmitted by the Bluetooth module.

[0021] Please see Figure 3 and Figure 4 An anti-backlash unit 3 is installed inside the current monitoring unit 2. The anti-backlash unit 3 includes two electrical connectors 301. A partition plate 205 is fixedly connected to the electrical connectors 301. The ends of the two electrical connectors 301 away from the first parallel connecting block 302 pass through the partition plate 205, the thermally conductive curing adhesive 204, and the cable mounting sleeve 203 in sequence, and are electrically connected to the conductive cable 102. The two partition plates 205 are symmetrically installed relative to the anti-backlash unit 3. Two first parallel connecting blocks 302 and two parallel connecting blocks 303 are installed between the two electrical connectors 301. A varistor 304, a fuse 305, and a PTC thermistor 306 are installed between the two first parallel connecting blocks 302. A diode 307 and a MOSFET 308 are installed between the two second parallel connecting blocks 303. 1. The first parallel connection block 302 and the second parallel connection block 303 are symmetrically installed relative to the PTC thermistor 306. The two terminals 301 are connected to the two ends of the varistor 304, the fuse 305 and the PTC thermistor 306 through the first parallel connection block 302. The two terminals 301 are connected to the two ends of the diode 307 and the MOSFET 308 through the second parallel connection block 303. The varistor 304, the fuse 305 and the PTC thermistor 306 can reduce the peak value of the instantaneous inrush current and avoid damage to the electrical components caused by the current change. The diode 307 and the MOSFET 308 can block the reverse voltage in the conductive cable 102 and keep the electrical components in the off state, effectively preventing the reverse current from entering the sensitive device through the conductive cable 102.

[0022] The varistor 304, fuse 305, PTC thermistor 306, diode 307, and MOSFET 308 are arranged linearly between the two terminals 301. The varistor 304, fuse 305, and PTC thermistor 306 are connected in parallel, and the diode 307 and MOSFET 308 are connected in parallel. This arrangement can effectively increase the resistance to back shocks from current and prevent back shock failure caused by damage to a single circuit, thereby improving the fault tolerance of the internal circuit of the conductive cable 102.

[0023] In summary, the first connector 101 and the two second connectors 104 are electrically connected between different electrical components to turn on the power. Both connectors 301 are electrically connected to the conductive cable 102, and both ends of the circuit board 206 are connected to the two connectors 301 through metal pins. The surface of the circuit board 206 is provided with an electronic ammeter, an electronic voltmeter, and a Bluetooth module. The electronic ammeter and electronic voltmeter can monitor the current and voltage of the two connectors 301 and transmit data through the Bluetooth module. A varistor 304, a fuse 305, a PTC thermistor 306, a diode 307, and a MOSFET 308 are installed between the two connectors 301. The two connectors 301 are connected to the varistor 304, the fuse 305, and the PTC thermistor 306 through two first parallel connecting blocks 302, and the two connectors 301 are connected to the diode 307 and the MOSFET 308 through a second parallel connecting block 303.

[0024] The varistor 304, fuse 305, and PTC thermistor 306 can reduce the peak value of instantaneous inrush current, preventing damage to electrical components caused by sudden current changes. The diode 307 and MOSFET 308 can block the reverse voltage in the conductive cable 102 and keep the electrical components in the off state, effectively preventing reverse current from entering sensitive devices through the conductive cable 102. The varistor 304, fuse 305, and PTC thermistor 306 are connected in parallel, and the diode 307 and MOSFET 308 are connected in parallel, which can effectively increase the resistance to reverse current surges and prevent the failure of the reverse current surge due to damage to a single circuit, thereby improving the fault tolerance of the circuit inside the conductive cable 102.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-level protective structure for preventing back-impact current in the middle of a wire harness, comprising an adapter connection unit (1), characterized in that: A current monitoring unit (2) is installed in the middle of the adapter connection unit (1). An anti-backlash unit (3) is installed inside the current monitoring unit (2). The anti-backlash unit (3) includes two terminals (301). Two first parallel connection blocks (302) and a second parallel connection block (303) are installed between the two terminals (301). A varistor (304), a fuse (305), and a PTC thermistor (303) are installed between the two first parallel connection blocks (302). 6) A diode (307) and a MOSFET (308) are installed between the two second parallel connection blocks (303). The two connection sockets (301), the first parallel connection block (302), and the second parallel connection block (303) are symmetrically installed with respect to the PTC thermistor (306). The varistor (304), fuse (305), PTC thermistor (306), diode (307), and MOSFET (308) are linearly arranged between the two connection sockets (301).

2. The multi-level protective wire harness intermediate anti-backlash current structure according to claim 1, characterized in that: The current monitoring unit (2) includes an insulating box (201), with cable mounting sleeves (203) fixedly installed at both ends of the insulating box (201), a sealing cover (202) fixedly installed at the upper end of the insulating box (201), partition plates (205) fixedly installed on the inner sides of both ends of the insulating box (201), thermally conductive curing adhesive (204) filling the space between the two partition plates (205) and both ends of the insulating box (201), and a support plate (207) fixedly installed between the two partition plates (205), with a circuit board (206) fixedly installed on the upper surface of the support plate (207).

3. The multi-level protective wire harness intermediate anti-backlash current structure according to claim 2, characterized in that: The adapter connection unit (1) includes a first connector (101), one end of which is equipped with a conductive cable (102), and the other end of the conductive cable (102) away from the first connector (101) is equipped with two second connectors (104). An adapter (103) is installed between the insulating box (201) and the two second connectors (104). The first connector (101), the insulating box (201), the adapter (103) and the two second connectors (104) are all fixedly connected by the conductive cable (102).

4. The multi-level protective wire harness intermediate anti-backlash current structure according to claim 3, characterized in that: The ends of the two electrical connectors (301) away from the first parallel electrical block (302) are respectively penetrated by the partition plate (205), the thermally conductive curing adhesive (204) and the cable mounting sleeve (203) and are electrically connected to the conductive cable (102). The partition plate (205) is fixedly connected to the electrical connector (301), and the two partition plates (205) are symmetrically installed relative to the anti-impact unit (3).

5. The multi-level protective wire harness intermediate anti-backlash current structure according to claim 4, characterized in that: The circuit board (206) is disposed between the support plate (207) and the sealing cover (202). Both ends of the circuit board (206) are provided with multiple metal pins. The bottom end of the metal pins passes through the circuit board (206) and is electrically connected to the power connector (301). The surface of the circuit board (206) is provided with an electronic ammeter, an electronic voltmeter and a Bluetooth module.

6. The multi-level protective wire harness intermediate anti-backlash current structure according to claim 5, characterized in that: The two terminals of the varistor (304), fuse (305) and PTC thermistor (306) are connected to each other through a first parallel connection block (302). The two terminals of the varistor (301) are connected to each other through a second parallel connection block (303). The varistor (304), fuse (305) and PTC thermistor (306) are connected in parallel. The diode (307) and MOSFET (308) are connected in parallel.

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