CN116131205A - Power supply cut-off holding circuit and vehicle - Google Patents

Power supply cut-off holding circuit and vehicle Download PDF

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Publication number
CN116131205A
CN116131205A CN202310079754.XA CN202310079754A CN116131205A CN 116131205 A CN116131205 A CN 116131205A CN 202310079754 A CN202310079754 A CN 202310079754A CN 116131205 A CN116131205 A CN 116131205A
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China
Prior art keywords
circuit
relay
power supply
input
contact
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Pending
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CN202310079754.XA
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Chinese (zh)
Inventor
周金山
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FAW Jiefang Automotive Co Ltd
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FAW Jiefang Automotive Co Ltd
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Priority to CN202310079754.XA priority Critical patent/CN116131205A/en
Publication of CN116131205A publication Critical patent/CN116131205A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electronic Switches (AREA)

Abstract

The invention relates to a cut-off holding circuit of a power supply and a vehicle, wherein the cut-off holding circuit comprises an input circuit, a control circuit, an output circuit and a self-resetting circuit, and the control circuit and the output circuit are disconnected from the self-resetting circuit so as to cut off an output power supply path between the power supply and an output end of the cut-off holding circuit, so that the power supply is powered off and kept in a powered-off state; in addition, the self-resetting circuit has an automatic resetting function, and after the self-resetting circuit is reset to be in an off state, the conducting state of the control circuit and the output circuit can be recovered, so that after the input circuit conducts the input power supply path where the power supply is located, the output power supply path between the power supply and the output end of the cut-off holding circuit can be conducted again, the power supply can supply power normally, the method of cutting off or recovering the power supply by using the controller is replaced, the implementation is easier, the cost is reduced, additional manual operation is not needed when the power supply is electrified again, the operation is simplified, and the safety and the reliability are improved.

Description

Power supply cut-off holding circuit and vehicle
Technical Field
The present invention relates to the field of electronic and electric technology, and more particularly, to a power supply shutdown holding circuit and a vehicle.
Background
According to the structural requirement GB 21668-2008 of the dangerous goods transportation vehicle, a control device for the opening and closing operation of a main power switch is arranged in a vehicle cab.
At present, a rocker switch is mainly arranged in a vehicle cab and used as a power control switch to switch on or switch off a whole vehicle power supply, a driver presses the power control switch to cut off the whole vehicle, but the driver needs to switch on the power control switch when starting next time, otherwise, the vehicle cannot be started, the operation is troublesome, and when the driver forgets to switch on the power control switch, part of electric appliances cannot be electrified, so that the driver suspects that the vehicle has faults.
Disclosure of Invention
In view of the above, it is desirable to provide a power supply interruption holding circuit and a vehicle that can interrupt the power supply and restore normal power supply of the power supply without manual operation.
In one aspect, embodiments of the present application provide a cut-off holding circuit of a power supply, the cut-off holding circuit including:
the input circuit is used for being connected with the power supply and used for switching on or switching off an input power supply path where the power supply is positioned;
the control circuit is connected with the input circuit and is used for controlling and conducting an output power supply path between the power supply and the output end of the cut-off holding circuit when the input circuit conducts the input power supply path;
the output circuit is respectively connected with the input circuit and the control circuit and is used for conducting the output power supply path under the condition that the control circuit is in a conducting state;
and the self-reset circuit is connected with the control circuit and is used for selecting to turn on or off the control circuit and the conduction state of the output circuit.
In one embodiment, when the input circuit is connected to the input power supply path and the self-resetting circuit is in a conducting state, the control circuit is in a disconnection state, and the control circuit is used for controlling the output power supply path to be disconnected so that the output circuit is in a disconnection state;
when the input circuit is connected with the input power supply path and the self-resetting circuit is reset to be in an off state, the control circuit keeps the off state, so that the output power supply path and the output circuit are kept in the off state.
In one embodiment, the self-resetting circuit comprises a self-resetting switch, a first end of the self-resetting switch is connected with the control circuit, and a second end of the self-resetting switch is grounded.
In one embodiment, the output circuit includes a first relay and the control circuit includes a second relay; wherein,,
the first end of the solenoid of the first relay is connected with the input circuit, the contact input end of the first relay and the first end of the solenoid of the second relay respectively, the second end of the solenoid of the first relay is connected with the normally closed contact end of the second relay, the contact input end of the first relay is connected with the input circuit and the first end of the solenoid of the second relay respectively, and the contact output end of the first relay is used as the output end of the cut-off holding circuit;
the first end of the solenoid of the second relay is connected with the input circuit, the second end of the solenoid of the second relay is grounded through the self-resetting circuit, the second end of the solenoid of the second relay is also connected with the normally open contact end of the second relay, the contact input end of the second relay is grounded, and the normally open contact end of the second relay is grounded through the self-resetting circuit.
In one embodiment, when the input circuit is connected to the input power supply circuit and the self-resetting circuit is in an off state, the power supply, the input circuit, the solenoid of the first relay, the contact input end of the second relay, the normally closed contact end of the second relay and the ground point form a loop, the contact input end of the second relay and the normally open contact end of the second relay are disconnected, the contact input end of the first relay and the contact output end of the first relay are connected, and the output power supply path is connected.
In one embodiment, when the input circuit is connected to the input power supply circuit and the self-resetting circuit is in a conductive state, the power supply, the input circuit, the solenoid of the second relay, the self-resetting circuit and the ground point form a loop, the contact input end of the second relay is connected to the normally open contact end of the second relay, the contact input end of the second relay is disconnected from the normally closed contact end of the second relay, and the contact input end of the first relay is disconnected from the contact output end of the first relay to disconnect the output power supply path.
In one embodiment, when the input circuit is connected to the input power supply circuit and the self-resetting circuit is reset to an off state, the power supply, the input circuit, the solenoid of the second relay, the contact input end of the second relay, the normally open contact end of the second relay and the ground point form a loop, the contact input end of the second relay is disconnected from the normally closed contact end of the second relay, the contact input end of the first relay and the contact output end of the first relay are kept in an off state, and the output power supply path is kept in an off state.
In one embodiment, when the self-resetting circuit is reset to an off state, under the condition that the input circuit breaks the input power supply path, the contact input end of the second relay is conducted with the normally-closed contact end of the second relay, the contact input end of the second relay is disconnected with the normally-open contact end of the second relay, the contact input end of the first relay is kept in an off state with the contact output end of the first relay, and the output power supply path is kept in an off state.
In another aspect, embodiments of the present application provide a vehicle including:
a power supply;
a cut-off holding circuit of a power supply as described in any one of the above embodiments; wherein the power supply is connected with an input circuit in the cut-off holding circuit.
In one embodiment, the input circuit includes a vehicle ignition switch or the vehicle ignition switch and the vehicle power switch in series.
The power supply cut-off holding circuit and the vehicle provided in the above embodiments, wherein the power supply cut-off holding circuit includes an input circuit, a control circuit, an output circuit, and a self-resetting circuit, and the control circuit and the output circuit are disconnected from the self-resetting circuit to cut off an output power supply path between the power supply and an output end of the cut-off holding circuit, so that the power supply is powered off and kept in a powered-off state; in addition, the self-resetting circuit has an automatic resetting function, and after the self-resetting circuit is reset to be in an off state, the conducting state of the control circuit and the output circuit can be recovered, so that after the input circuit conducts the input power supply path where the power supply is located, the output power supply path between the power supply and the output end of the cut-off holding circuit can be conducted again, the power supply can supply power normally, the method of cutting off or recovering the power supply by using the controller is replaced, the implementation is easier, the cost is reduced, additional manual operation is not needed when the power supply is electrified again, the operation is simplified, and the safety and the reliability are improved.
Drawings
FIG. 1 is a schematic diagram of a frame of a cut-off hold circuit provided by one embodiment;
FIG. 2 is a schematic diagram of a cut-off hold circuit provided in one embodiment;
FIG. 3 is a schematic frame diagram of a vehicle according to one embodiment;
fig. 4 is a schematic diagram of a cut-off holding circuit according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
As to the background art, after the power supply of the whole car is cut off by using the power supply control switch, the power supply control switch needs to be manually turned on for next car starting, and the operation is troublesome. Therefore, the application provides a power supply cut-off and hold circuit and a vehicle, which can cut off the power supply, can switch on the power supply without manual operation, and simplifies the operation.
In one embodiment, as shown in FIG. 1, a power supply shutdown hold circuit 10 is provided. The power supply shutdown and hold circuit 10 includes an input circuit 110, a control circuit 120, an output circuit 130, and a self-resetting circuit 140. The input circuit 110 is used for being connected with a power supply, and the input circuit 110 is used for switching on or switching off an input power supply path where the power supply is located. The input circuit 110 may be switched between two states, an on input power circuit and an off input power circuit. The control circuit 120 is connected to the input circuit 110, and the control circuit 120 is configured to control the on-power supply and to cut off the output power supply path between the output terminals of the holding circuit 10 when the input circuit 110 turns on the input power supply path. The output circuit 130 is connected to the input circuit 110 and the control circuit 120, respectively, and the output circuit 130 is configured to turn on the output power supply path when the control circuit 120 is in a conductive state. The self-reset circuit 140 is connected to the control circuit 120, and the self-reset circuit 140 is used for selecting to turn on or off the conduction states of the control circuit 120 and the output circuit 130. The self-reset circuit 140 has an automatic reset function.
The power supply cut-off holding circuit 10 provided in the above embodiment includes an input circuit 110, a control circuit 120, an output circuit 130 and a self-reset circuit 140, where the control circuit 120 and the output circuit 130 are disconnected from the self-reset circuit 140 to cut off an output power supply path between the power supply and an output end of the cut-off holding circuit, so that the power supply is cut off and kept in a cut-off state; in addition, since the self-resetting circuit 140 has an automatic resetting function, after the self-resetting circuit 140 is reset to an off state, the on state of the control circuit 120 and the output circuit 130 can be recovered, so that after the input power supply path where the power supply is located is conducted again through the input circuit 110, the output power supply path between the power supply and the output end of the cut-off holding circuit 10 can be conducted, so that the power supply can supply power normally, the power supply is cut off or recovered by replacing the method of using the controller, the implementation is easier, the cost is reduced, no additional manual operation is needed during the power-up again, the operation is simplified, and the safety and the reliability are improved.
With continued reference to fig. 1, in one embodiment, when the input circuit 110 is turned on the input power supply path where the power source is located and the self-resetting circuit 140 is in the on state, the control circuit 120 is in the off state, and the control circuit 120 is configured to control the output power supply path between the power source and the output terminal of the hold circuit 10 to be turned off, so that the output circuit 130 is in the off state. When the input circuit 110 turns on the input power supply path where the power source is located and resets from the reset circuit 140 to the off state, the control circuit 120 maintains the on state, and both the output power supply path where the power source is located and the output circuit 130 maintain the off state.
The power supply cut-off holding circuit 10 provided in the above embodiment cuts off the output power supply path between the power supply and the output end of the cut-off holding circuit by disconnecting the control circuit 120 and the output circuit 130 from the reset circuit 140, so that the power supply is cut off and kept in a cut-off state; in addition, since the self-resetting circuit 140 has an automatic resetting function, after the self-resetting circuit 140 is reset to an off state, the on state of the control circuit 120 and the output circuit 130 can be recovered, so that after the input power supply path where the power supply is located is conducted again through the input circuit 110, the output power supply path between the power supply and the output end of the cut-off holding circuit 10 can be conducted, so that the power supply can supply power normally, the power supply is cut off or recovered by replacing the method of using the controller, the implementation is easier, the cost is reduced, no additional manual operation is needed during the power-up again, the operation is simplified, and the safety and the reliability are improved.
In one embodiment, as shown in fig. 2, the self-resetting circuit 140 may include a self-resetting switch S2, a first terminal 1 of the self-resetting switch S2 being connected to the control circuit 120, and a second terminal 2 of the self-resetting switch being grounded. The self-reset switch S2 is pressed, and the self-reset switch S2 is in a conductive state. The self-reset switch S2 is released and the self-reset switch S2 is reset to the off state. Therefore, the on state of the control circuit 120 and the output circuit 130 is selected to be turned on or off from the reset switch S2, so that the power supply of the power supply is cut off or automatically restored, a method of controlling an electric loop by using a controller is replaced, the implementation is easier, the cost is reduced, and the safety and the reliability of the circuit are improved.
With continued reference to fig. 2, in one embodiment, the output circuit 130 includes a first relay K1, and the first relay K1 may be a normally open relay, for example. The control circuit 120 includes a second relay K2, and the second relay K2 may be a switching type single pole double throw relay, for example.
The first end 1 of the solenoid of the first relay K1 is connected with the input circuit 110, the contact input end 3 of the first relay K1, and the first end 1 of the solenoid of the second relay K2, the second end 2 of the solenoid of the first relay K1 is connected with the normally closed contact end 4 of the second relay K2, the contact input end 3 of the first relay K1 is connected with the input circuit 110 and the first end 1 of the solenoid of the second relay K2, and the contact output end 4 of the first relay K1 is used as an output end of the cut-off holding circuit 10. When the solenoid of the first relay K1 is not energized, the contact input 3 of the first relay K1 is disconnected from the contact output 4 of the first relay K1. When the solenoid of the first relay K1 is electrified, the contact of the first relay K1 is attracted, and the contact input end 3 of the first relay K1 is conducted with the contact output end 4 of the first relay K1.
The first end 1 of the solenoid of the second relay K2 is respectively connected with the first end 1 of the solenoid of the first relay K1 and the contact input end 3 of the solenoid of the first relay K1, the first end 1 of the solenoid of the second relay K2 is also connected with the input circuit 110, the second end 2 of the solenoid of the second relay K2 is grounded through the self-resetting circuit 140, the second end 2 of the solenoid of the second relay K2 is also connected with the normally open contact end 5 of the second relay K2, the contact input end 3 of the second relay K2 is grounded, the normally closed contact end 4 of the second relay K2 is connected with the second end 2 of the solenoid of the first relay K1, the normally open contact end 5 of the second relay K2 is connected with the second end 2 of the solenoid of the second relay K2, and the normally open contact end 5 of the second relay K2 is also grounded through the self-resetting circuit 140. When the solenoid coil of the second relay K2 is not electrified, the contact input end 3 of the second relay K2 is conducted with the normally closed contact end 4 of the second relay K2, and the contact input end 3 of the second relay K2 is disconnected with the normally open contact end 5 of the second relay K2. When the solenoid of the second relay K2 is electrified, the contact of the second relay K2 is switched, the contact input end 3 of the second relay K2 is disconnected with the normally closed contact end 4 of the second relay K2, and the contact input end 3 of the second relay K2 is conducted with the normally open contact end 5 of the second relay K2.
As shown in fig. 2, the self-resetting circuit 140 includes a self-resetting switch S2, wherein a first end 1 of the self-resetting switch S2 is respectively connected to a second end 2 of a solenoid of the second relay K2 and a normally open contact end 5 of the second relay K2, and a second end of the self-resetting switch S2 is grounded.
The power supply cut-off and hold circuit 10 provided in the above embodiment adopts a mode that two relays are connected in series, so that the cut-off self-locking of the control electric loop is realized, the electric loop is automatically restored after power is turned off, the scheme that only one relay or trigger is used for realizing single cut-off of the electric loop and the electric loop can be restored after the next time the vehicle is restarted by pressing the control switch again is replaced, the cut-off and hold circuit 10 is applied to a power supply scene of a vehicle, a driver can directly start the vehicle without operating the power supply control switch first when the driver next time starts, the operation is simple, and the concern that the vehicle is easy to be suspected to have faults because the driver fails to normally and pneumatically when forgets to turn on the power supply control switch can be eliminated.
With continued reference to fig. 2, in one embodiment, when the input circuit 110 is turned on and the input power supply circuit is turned off from the reset circuit 140, the power Vcc, the input circuit 110, the solenoid of the first relay K1, the contact input terminal 3 of the second relay K2, and the normally closed contact terminal 4 of the second relay K2 form a loop with the ground GND. In this case, the solenoid of the second relay K2 is not energized, at this time, the contact input terminal 3 of the second relay K2 and the normally open contact terminal 5 of the second relay K2 are disconnected, while the solenoid of the first relay K1 is energized, the contact of the first relay K1 is closed, the contact input terminal 3 of the first relay K1 and the contact output terminal 4 of the first relay K1 are turned on, so that the output power supply path between the power supply and the output terminal of the cut-off holding circuit 10 is turned on, and the contact output terminal 4 of the first relay K1, that is, the output terminal of the cut-off holding circuit 10, outputs the power supply voltage to supply power to the device.
The power supply cut-off holding circuit 10 provided in the above embodiment can switch on the output power supply circuit between the power supply and the cut-off holding circuit 10 through the input circuit 110 when the self-resetting circuit 140 is in the off state, thereby realizing that the power supply supplies power to the device.
With continued reference to fig. 2, in one embodiment, when the input circuit 110 is turned on and the self-reset circuit 140 is in a conductive state, the power Vcc, the input circuit 110, the solenoid of the second relay K2, the self-reset circuit 140 and the ground GND form a loop. In this case, when the solenoid of the second relay K2 is energized, the contact of the second relay K2 is switched, the contact input end 3 of the second relay K2 is conducted with the normally open contact end 5 of the second relay K2, the contact input end 3 of the second relay K2 is disconnected with the normally closed contact end 4 of the second relay K2, and the solenoid of the first relay K1 is powered down, so that the contact input end 3 of the first relay K1 is disconnected with the contact output end 4 of the first relay K1, thereby disconnecting the output power supply path between the power supply and the output end of the cut-off holding circuit 10, and the contact output end 4 of the first relay K1 is cut-off the output end of the holding circuit 10 without power supply voltage output, and power supply is stopped.
In the power supply interruption maintaining circuit 10 provided in the above embodiment, when the input circuit 110 is turned on to input the power supply circuit, the self-reset circuit 140 is switched on, and the output power supply circuit between the power supply interruption and the contact output end of the first relay K1 can be interrupted by the second relay K2, so that the contact of the first relay K1 is in the off state, thereby realizing the interruption protection of the power supply and improving the safety and reliability of the power supply.
With continued reference to fig. 2, in one embodiment, when the input circuit 110 turns on the input power supply circuit and the reset circuit 20 is turned off, the power Vcc, the input circuit 110, the solenoid of the second relay K2, the contact input terminal 3 of the second relay K2, and the normally open contact terminal 5 of the second relay K2 form a loop with the ground GND. In this case, the solenoid of the second relay K2 is continuously energized, so that the contact of the contact input end 3 of the second relay K2 is kept engaged with the normally open contact end 5, at this time, the contact input end 3 of the second relay K2 is conducted with the normally open contact end 5 of the second relay K2, the contact input end 3 of the second relay K2 is disconnected with the normally closed contact end 4 of the second relay K2, while the solenoid of the first relay K1 is continuously maintained in a power-off state, so that the contact input end 3 of the first relay K1 is maintained in a power-off state with the contact output end 4 of the first relay K1, and the output power supply path between the power source and the output end of the cut-off maintaining circuit 10 is also maintained in a power-off state, so that the contact output end 4 of the first relay K1, that is the cut-off maintaining circuit output end, still has no power supply voltage output, and power supply is continuously stopped.
In the power supply interruption maintaining circuit 10 provided in the above embodiment, when the input circuit 110 is turned on and the input power supply circuit is turned on, the self-reset circuit 140 is automatically reset to the off state, and the solenoid of the second relay K2 continues to be electrified, so that the contact of the first relay K1 is kept in the off state, thereby keeping the output power supply circuit in the off state, realizing the protection of power supply interruption and simultaneously automatically keeping the interruption, and further improving the safety and reliability of the power supply.
With continued reference to fig. 2, in one embodiment, when the self-reset circuit 140 is reset to the off state, the solenoid of the second relay K2 is powered down when the input circuit 110 is disconnected from the input power supply path, at this time, the contacts of the second relay K2 are switched again, the contacts of the second relay K2 are restored to the initial state, the contact input terminal 3 of the second relay K2 is conducted with the normally closed contact terminal 4 of the second relay, and the contact input terminal 3 of the second relay K2 is disconnected with the normally open contact terminal 5 of the second relay K2. The first relay K1 is still not electrified, at this time, the contact input end 3 of the first relay K1 and the contact output end 4 of the first relay K1 are kept in a disconnected state, the output power supply path is also kept in a disconnected state, and the contact output end 4 of the first relay K1, namely, the output end of the cut-off holding circuit still has no power supply voltage output, and power supply is continuously stopped.
The power-off holding circuit 10 provided in the above embodiment, when the self-resetting circuit 140 is reset to the off state, turns off the input power supply circuit through the input circuit 110, can make the solenoid of the second relay K2 power down, and the contacts switch over, and restore to the initial state, so that when the power is on again, the solenoid of the first relay K1 can be powered on, thereby turning on the output power supply circuit between the power source and the contact output end of the first relay K1, thereby realizing the protection of power-off and simultaneously automatically restoring the initial state without manual switching on, and simplifying the operation.
With continued reference to fig. 2, in one embodiment, the input circuit 110 may include a switch S1, where a first terminal 1 of the switch S1 is connected to the power source Vcc, and a second terminal 2 of the switch S1 is connected to the first terminal 1 of the solenoid of the first relay K1, the contact input point 3 of the first relay K1, and the first terminal 1 of the solenoid of the second relay K2, respectively. When the switch S1 is closed, an input power supply circuit where the power supply Vcc is positioned is turned on; when the switch S1 is turned off, the input power supply circuit where the power supply Vcc is turned off. Illustratively, the switch S1 is a latching switch.
In one embodiment, as shown in FIG. 3, a vehicle is provided. The vehicle includes a power supply 20 and a cut-off holding circuit 10 provided in any of the embodiments described above. Wherein the power supply 20 is connected to the input circuit 110 in the cut-off holding circuit 10.
The vehicle provided in the above embodiment can facilitate the driver/operator to realize emergency power-off in the critical situation by cutting off the self-resetting circuit 140 in the protection circuit 10, and can recover normal power distribution without any additional operation when being powered on again, and the operation is simple and easy to realize.
In one embodiment, the input circuit 110 may include a vehicle ignition switch or a series of a vehicle ignition switch and a vehicle power switch.
For better understanding, the power supply cut-off holding circuit 10 provided in the above embodiment is described in a scene where it is applied to a vehicle, with reference to fig. 2 and 4. As shown in fig. 4, S2 is a schematic entity of the self-reset switch S2 in fig. 2, K2 is a schematic entity of the second relay K2 in fig. 2, K1 is a schematic entity of the first relay K1 in fig. 2, S1 is a schematic entity of the switch S1 in fig. 2, and all the entity implementations of the electrical symbols in fig. 2 include, but are not limited to, the corresponding entity implementations in fig. 4.
In practical application, the switch S1 is a power supply main switch, the power supply main switch S1 is closed, the power supply Vcc, the power supply main switch S1, the solenoid of the first relay K1, the contact input end 3 and the normally closed contact end 4 of the second relay K2 form a loop with the ground point GND, the contact input end 3 and the contact output end 4 of the first relay K1 are attracted, and the contact output end 4 of the first relay K1 outputs high voltage to supply power to the automobile.
When the power supply of the whole vehicle needs to be cut off, the self-reset switch S2 is pressed, the power Vcc, the solenoid coil of the second relay K2 of the power master switch S1, the self-reset switch S2 and the ground GND form a loop, the contacts of the second relay K2 are switched, the input contact end 3 of the second relay K2 is attracted with the normally open contact end 5 and disconnected with the normally closed contact end 4, the solenoid coil of the first relay K1 is powered off, and the contact input end 3 and the contact output end 4 of the first relay K1 are disconnected, so that the whole vehicle is powered off.
When the self-resetting switch S2 is released, the self-resetting switch S2 is reset to be in an off state, and a power supply Vcc, a power supply main switch S1, a solenoid coil of the second relay K2, a normally open contact end 5 and a contact input end 3 of the second relay K2 form a loop with a grounding point GND, the solenoid coil of the second relay K2 is continuously electrified, so that the contact input end 3 of the second relay K2 is kept attracted to the normally open contact end 5, and a contact output end 4 of the first relay K1 is kept in an off state.
After normal parking, the power supply main switch S1 is disconnected, the solenoid of the second relay K2 is powered off, the contact of the second relay K2 is restored to an initial state, and the automatic reset switch S2 is not required to be switched on again when the vehicle is started next time, so that normal ignition and starting can be realized.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A cut-off holding circuit of a power supply, characterized by comprising:
the input circuit is used for being connected with the power supply and used for switching on or switching off an input power supply path where the power supply is positioned;
the control circuit is connected with the input circuit and is used for controlling and conducting an output power supply path between the power supply and the output end of the cut-off holding circuit when the input circuit conducts the input power supply path;
the output circuit is respectively connected with the input circuit and the control circuit and is used for conducting the output power supply path under the condition that the control circuit is in a conducting state;
and the self-reset circuit is connected with the control circuit and is used for selecting to turn on or off the control circuit and the conduction state of the output circuit.
2. The power supply cut-off holding circuit according to claim 1, wherein when the input circuit turns on the input power supply path and the self-resetting circuit is in an on state, the control circuit is in an off state, and the control circuit is configured to control cutting off the output power supply path so that the output circuit is in an off state;
when the input circuit is connected with the input power supply path and the self-resetting circuit is reset to be in an off state, the control circuit keeps the off state, so that the output power supply path and the output circuit are kept in the off state.
3. The power supply shutdown and hold circuit of claim 1, wherein the self-reset circuit comprises a self-reset switch, a first end of the self-reset switch being connected to the control circuit, a second end of the self-reset switch being grounded.
4. The power supply cut-off holding circuit according to claim 1, wherein the output circuit includes a first relay, and the control circuit includes a second relay; wherein,,
the first end of the solenoid of the first relay is connected with the input circuit, the contact input end of the first relay and the first end of the solenoid of the second relay respectively, the second end of the solenoid of the first relay is connected with the normally closed contact end of the second relay, the contact input end of the first relay is connected with the input circuit and the first end of the solenoid of the second relay respectively, and the contact output end of the first relay is used as the output end of the cut-off holding circuit;
the first end of the solenoid of the second relay is connected with the input circuit, the second end of the solenoid of the second relay is grounded through the self-resetting circuit, the second end of the solenoid of the second relay is also connected with the normally open contact end of the second relay, the contact input end of the second relay is grounded, and the normally open contact end of the second relay is grounded through the self-resetting circuit.
5. The power supply shutdown and hold circuit according to claim 4, wherein when the input circuit turns on the input power supply circuit and the self-resetting circuit is in an off state, the power supply, the input circuit, the solenoid of the first relay, the contact input terminal of the second relay, and the normally closed contact terminal of the second relay form a loop with a ground point, the contact input terminal of the second relay and the normally open contact terminal of the second relay are turned off, and the contact input terminal of the first relay and the contact output terminal of the first relay are turned on, and the output power supply path is turned on.
6. The power supply interruption holding circuit of claim 4 wherein when the input circuit turns on the input power supply circuit and the self-resetting circuit is in an on state, the power supply, the input circuit, the solenoid of the second relay, the self-resetting circuit and a ground point form a loop, the contact input of the second relay is turned on with the normally open contact end of the second relay, the contact input of the second relay is turned off with the normally closed contact end of the second relay, the contact input of the first relay is turned off with the contact output of the first relay, and the output power supply path is disconnected.
7. The power supply interruption holding circuit of claim 4 wherein when the input circuit turns on the input power supply circuit and the self-resetting circuit is reset to an off state, the power supply, the input circuit, the solenoid of the second relay, the contact input of the second relay, the normally open contact of the second relay and a ground point form a loop, the contact input of the second relay and the normally closed contact of the second relay are disconnected, the contact input of the first relay and the contact output of the first relay remain in an off state, and the output power supply path remains in an off state.
8. The cut-off holding circuit according to claim 4, wherein when the self-resetting circuit is reset to an off state, a contact input terminal of the second relay is turned on with a normally closed contact terminal of the second relay, a contact input terminal of the second relay is turned off with a normally open contact terminal of the second relay, a contact input terminal of the first relay is kept in an off state with a contact output terminal of the first relay, and the output power supply path is kept in an off state in a case where the input circuit is turned off the input power supply path.
9. A vehicle, characterized in that the vehicle comprises:
a power supply;
a cut-off holding circuit of a power supply according to any one of claims 1 to 8; wherein the power supply is connected with an input circuit in the cut-off holding circuit.
10. The vehicle of claim 9, wherein the input circuit comprises a vehicle ignition switch or the vehicle ignition switch and the vehicle power switch in series.
CN202310079754.XA 2023-02-01 2023-02-01 Power supply cut-off holding circuit and vehicle Pending CN116131205A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310079754.XA CN116131205A (en) 2023-02-01 2023-02-01 Power supply cut-off holding circuit and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310079754.XA CN116131205A (en) 2023-02-01 2023-02-01 Power supply cut-off holding circuit and vehicle

Publications (1)

Publication Number Publication Date
CN116131205A true CN116131205A (en) 2023-05-16

Family

ID=86311400

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310079754.XA Pending CN116131205A (en) 2023-02-01 2023-02-01 Power supply cut-off holding circuit and vehicle

Country Status (1)

Country Link
CN (1) CN116131205A (en)

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