CN210122054U - Power supply switching circuit and vehicle - Google Patents
Power supply switching circuit and vehicle Download PDFInfo
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- CN210122054U CN210122054U CN201920946684.2U CN201920946684U CN210122054U CN 210122054 U CN210122054 U CN 210122054U CN 201920946684 U CN201920946684 U CN 201920946684U CN 210122054 U CN210122054 U CN 210122054U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The utility model discloses a power supply switching circuit and vehicle, wherein, power supply switching circuit includes: the device comprises a first on-off module, a second on-off module and a control module; the control end of the first on-off module is electrically connected with the output end of the control module, the input end of the first on-off module is electrically connected with the standby power supply, and the output end of the first on-off module is electrically connected with the load; the control end of the second on-off module is electrically connected with a power supply of the storage battery of the whole vehicle, the input end of the second on-off module is electrically connected with a low-voltage power supply, and the output end of the second on-off module is electrically connected with a load; the control end of the control module is electrically connected with a power supply of a storage battery of the whole vehicle; wherein, the low-voltage power supply is obtained by reducing the voltage of the storage battery power supply of the whole vehicle. The utility model provides a power supply switching circuit and vehicle has realized stable power supply switching function, and the cost is lower.
Description
Technical Field
The utility model relates to a new energy automobile technical field especially relates to a power supply switching circuit and vehicle.
Background
The new energy automobile adopts unconventional automobile fuel as a power source, integrates advanced technologies in the aspects of power control and driving of the automobile, forms an automobile with advanced technical principle, new technology and new structure, and is more and more widely used along with the enhancement of environmental awareness and diversification of requirements.
Products with remote communication functions, such as a vehicle-mounted T-BOX (vehicle-mounted intelligent terminal) on a new energy vehicle, are provided with a standby battery, when a fault occurs to cause the power failure of a storage battery of the whole vehicle, the products can be switched to the onboard standby battery, and the condition that the fault state, the position information and other whole vehicle information during the fault are reported to a background server is ensured, so that the stability of a power supply switching circuit is of great importance.
The existing power switching circuit is mostly controlled by software, when a system is powered down, a fault is detected by a controller before the power down of the controller, and the power switching is completed by a main control chip in the controller before the power down of the controller, but due to the instability (temperature, electromagnetic environment and the like) of a vehicle-mounted environment, the response delay of the main control chip can occur, so that the situation of switching failure is caused. Or the power switch chip is adopted to switch the power supply when the fault occurs, and the integrated chip is provided with the power supply and has higher cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power supply switching circuit and vehicle to realize stable power supply switching function, and the cost is lower.
In a first aspect, an embodiment of the present invention provides a power switching circuit, including:
the device comprises a first on-off module, a second on-off module and a control module;
the control end of the first on-off module is electrically connected with the output end of the control module, the input end of the first on-off module is electrically connected with the standby power supply, and the output end of the first on-off module is electrically connected with the load;
the control end of the second on-off module is electrically connected with a power supply of a storage battery of the whole vehicle, the input end of the second on-off module is electrically connected with a low-voltage power supply, and the output end of the second on-off module is electrically connected with a load;
the control end of the control module is electrically connected with a power supply of a storage battery of the whole vehicle;
the low-voltage power supply is obtained by reducing the voltage of the whole vehicle storage battery power supply.
Optionally, the first on-off module includes a first field effect transistor and a first switch unit;
the second switching-off module comprises a second field effect transistor and a second switching unit;
the control module comprises a third switching unit and a control source unit;
the input end of the first field effect transistor is used as the input end of the first on-off module and is electrically connected with a standby power supply, and the output end of the first field effect transistor is used as the output end of the first on-off module and is electrically connected with a load;
the input end of the second field effect transistor is used as the input end of the second on-off module and is electrically connected with a low-voltage power supply, and the output end of the second field effect transistor is used as the output end of the second on-off module and is electrically connected with a load;
the input end of the first switch unit is electrically connected with the control end of the first field effect transistor, the output end of the first switch unit is grounded, the control end of the first switch unit is used as the control end of the first on-off module and is electrically connected with the output end of the control module, and the output end of the third switch unit is used as the output end of the control module;
the input end of the second switch unit is electrically connected with the control end of the second field effect transistor, the output end of the second switch unit is grounded, and the control end of the second switch unit is used as the control end of the second on-off module and is electrically connected with a storage battery power supply of the whole vehicle;
the input end of the third switch unit is electrically connected with the control source unit, and the control end of the third switch unit is used as the control end of the control module and is electrically connected with the whole vehicle storage battery power supply.
Optionally, the control module further comprises a diode;
the positive pole of the diode is electrically connected with the control end of the third switch unit, and the negative pole of the diode is electrically connected with the whole vehicle storage battery power supply.
Optionally, the power switching circuit further includes a first and logic circuit and a second and logic circuit;
the first input end of the first and logic circuit is electrically connected with the low-voltage power supply, the second input end of the first and logic circuit is electrically connected with the power supply of the whole vehicle storage battery, and the output end of the first and logic circuit is electrically connected with the control end of the third switch unit;
the first input end of the second and logic circuit is electrically connected with a low-voltage power supply, the second input end of the second and logic circuit is electrically connected with the power supply of the whole vehicle storage battery, and the output end of the second and logic circuit is electrically connected with the control end of the second switch unit.
Optionally, the first on-off module further includes a first clamping circuit;
the second on-off module further comprises a second clamping circuit;
a first end of the first clamping circuit is electrically connected with an input end or an output end of the first field effect transistor, and a second end of the first clamping circuit is electrically connected with a control end of the first field effect transistor and an input end of the first switching unit;
the first end of the second clamping circuit is electrically connected with the input end or the output end of the second field effect transistor, and the second end of the second clamping circuit is electrically connected with the control end of the second field effect transistor and the input end of the second switch unit.
Optionally, the first on-off module further includes a third field effect transistor;
the input end of the third field effect transistor is electrically connected with the output end of the first field effect transistor, the output end of the third field effect transistor is electrically connected with the load, and the control end of the third field effect transistor is electrically connected with the input end of the first switch unit.
Optionally, the first on-off module further includes a third clamping circuit;
the first end of the third clamping circuit is electrically connected with the control end of the first field effect transistor;
a second end of the third clamp circuit is electrically connected with the input end of the first field effect transistor and the output end of the third field effect transistor, or the second end of the third clamp circuit is electrically connected with the output end of the first field effect transistor and the input end of the third field effect transistor;
the third end of the third clamping circuit is electrically connected with the control end of the third field effect transistor, and the fourth end of the third clamping circuit is electrically connected with the input end of the first switching unit.
Optionally, the control source unit includes an energy storage circuit and a first resistor;
the input end of the energy storage circuit is electrically connected with a power supply of a storage battery of the whole vehicle, the output end of the energy storage circuit is electrically connected with the first end of the first resistor, and the second end of the first resistor is electrically connected with the input end of the third switch unit;
wherein the energy storage circuit comprises an energy storage capacitor;
the first end of the energy storage capacitor is electrically connected with the whole vehicle storage battery power supply, and the second end of the energy storage capacitor is grounded.
Optionally, the control source unit includes an energy storage circuit and a control unit;
the input end of the energy storage circuit is electrically connected with a power supply of a storage battery of the whole vehicle, the output end of the energy storage circuit is electrically connected with the input end of the control unit, and the output end of the control unit is electrically connected with the input end of the third switch unit;
wherein the energy storage circuit comprises an energy storage capacitor;
the first end of the energy storage capacitor is electrically connected with the whole vehicle storage battery power supply, and the second end of the energy storage capacitor is grounded.
In a second aspect, an embodiment of the present invention further provides a vehicle, where the vehicle includes any one of the power switching circuits of the first aspect.
The embodiment of the utility model provides a power supply switching circuit cuts off or switches on through control module according to whole car battery power supply power-on or the first break-make module of power down control to realize the power switching of load. The embodiment of the utility model provides a power supply switching circuit switches through hard wire control power, need not from taking the power, thereby has solved the delayed problem that leads to switching failure and cost are higher of current power supply switching circuit power switching response, the cost is reduced when having realized stable power switching function.
Drawings
Fig. 1 is a schematic structural diagram of a power switching circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another power switching circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another power switching circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control source unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another control source unit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is the embodiment of the present invention provides a structural schematic diagram of a power switching circuit, as shown in fig. 1, the embodiment of the present invention provides a power switching circuit, including: a first switching module 11, a second switching module 12 and a control module 13. The control end 111 of the first on-off module 11 is electrically connected to the output end 131 of the control module 13, the input end 112 of the first on-off module 11 is electrically connected to the standby power supply 14, and the output end 113 of the first on-off module 11 is electrically connected to the load 15. The control end 121 of the second on-off module 12 is electrically connected with the finished automobile storage battery power supply 16, the input end 122 of the second on-off module 12 is electrically connected with the low-voltage power supply 19, the output end 123 of the second on-off module 12 is electrically connected with the load 15, and the control end 132 of the control module 13 is electrically connected with the finished automobile storage battery power supply 16, wherein the low-voltage power supply 19 is obtained by reducing the voltage of the finished automobile storage battery power supply 16.
Specifically, after the battery power supply 16 of the whole vehicle is powered on, the second on-off module 12 is turned on, the low-voltage power supply 19 supplies power to the load 15 through the second on-off module 12, the control module 13 controls the first on-off module 11 to be turned off, at this time, the standby power supply 14 is turned off from the load 15, and the load 15 is supplied with power by the low-voltage power supply 19. When the power supply 16 of the storage battery of the whole vehicle is powered off, the second on-off module 12 is disconnected, the control module 13 controls the first on-off module 11 to be connected, the standby power supply 14 supplies power to the load 15 through the first on-off module 11, and at the moment, the load 15 is switched to be supplied with power by the standby power supply 14. When the power supply 16 of the storage battery of the whole vehicle is recovered, the second on-off module 12 is switched on, the low-voltage power supply 19 supplies power to the load 15 through the second on-off module 12, the control module 13 controls the first on-off module 11 to be switched off, at the moment, the standby power supply 14 and the load 15 are switched off, and the load 15 is supplied with power by the low-voltage power supply 19.
The embodiment of the utility model provides a power supply switching circuit, through control module 13 according to whole car battery power 16 go up the electricity or the first break-make module 11 disconnection of power down control or switch on to realize load 15's power switching. The embodiment of the utility model provides a power supply switching circuit switches through hard wire control power, need not from taking the power, thereby has solved the delayed problem that leads to switching failure and cost are higher of current power supply switching circuit power switching response, the cost is reduced when having realized stable power switching function.
With continued reference to fig. 1, optionally, the first switching module 11 includes a first field effect transistor 21 and a first switching unit 22, the second switching module 12 includes a second field effect transistor 23 and a second switching unit 24, and the control module 13 includes a third switching unit 25 and a control source unit 26. The input end 211 of the first field effect transistor 21 is electrically connected to the standby power supply 14 as the input end 112 of the first switching module 11, the output end 212 of the first field effect transistor 21 is electrically connected to the load 15 as the output end 113 of the first switching module 11, the input end 231 of the second field effect transistor 23 is electrically connected to the low-voltage power supply 19 as the input end 122 of the second switching module 12, and the output end 232 of the second field effect transistor 23 is electrically connected to the load 15 as the output end 123 of the second switching module 12. The input end 221 of the first switch unit 22 is electrically connected with the control end 213 of the first field effect transistor 21, the output end 222 of the first switch unit 22 is grounded, the control end 223 of the first switch unit 22 is electrically connected with the output end 131 of the control module 13 as the control end 111 of the first on-off module 11, the output end 251 of the third switch unit 25 is electrically connected with the output end 131 of the control module 13 as the output end 251 of the second switch unit 24, the input end 241 of the second switch unit 24 is electrically connected with the control end 233 of the second field effect transistor 23, the output end 242 of the second switch unit 24 is grounded, and the control end 243 of the second switch unit 24 is electrically connected with the vehicle battery power supply 16 as the control end 121 of the second on-off. The input end 252 of the third switching unit 25 is electrically connected to the control source unit 26, and the control end 253 of the third switching unit 25 is electrically connected to the entire vehicle battery power supply 16 as the control end 132 of the control module 13.
Specifically, after the vehicle battery power supply 16 is powered on, the vehicle battery power supply 16 outputs a high voltage to turn on the second switching unit 24, so that the second field effect transistor 23 is turned on, and the low-voltage power supply 19 supplies power to the load 15 through the second field effect transistor 23; the whole vehicle storage battery power supply 16 outputs high voltage to enable the third switching unit 25 to be cut off, the first switching unit 22 is cut off, the first field effect transistor 21 is cut off, the standby power supply 14 and the load 15 are disconnected, and the load 15 is powered by the low-voltage power supply 19. When the vehicle storage battery power supply 16 is powered off, the vehicle storage battery power supply 16 is not electrified, so that the second switching unit 24 is cut off, the second field effect transistor 23 is cut off, and the low-voltage power supply 19 and the load 15 are disconnected; the control source unit 26 controls the third switching unit 25 to be turned on (a resistor is arranged between the input end 252 of the third switching unit 25 and the control end 253 of the third switching unit 25, not shown in the figure, and when the vehicle battery power supply 16 is powered off, the resistor enables the control source unit 26 to control the third switching unit 25 to be turned on), the first switching unit 22 is turned on, so that the first field effect transistor 21 is turned on, the standby power supply 14 supplies power to the load 15 through the first field effect transistor 21, and the power supply of the load 15 by the standby power supply 14 is realized. When the vehicle storage battery power supply 16 is recovered, the vehicle storage battery power supply 16 recovers to output high voltage to enable the second switch unit 24 to be conducted, so that the second field effect transistor 23 is conducted, and the low-voltage power supply 19 supplies power to the load 15 through the second field effect transistor 23; the finished vehicle storage battery power supply 16 recovers to output high voltage, so that the third switching unit 25 is cut off, the first switching unit 22 is cut off, the first field effect transistor 21 is cut off, the standby power supply 14 and the load 15 are disconnected, and power supply switching of the load 15 is achieved.
The embodiment of the utility model provides a power supply switching circuit, through control module 13 according to whole car battery power 16 go up the electricity or the first break-make module 11 disconnection of power down control or switch on to realize load 15's power switching. The embodiment of the utility model provides a power supply switching circuit adopts discrete components such as field effect transistor, by hardwire transmission control signal, when the system falls the electricity, by hardwire transmission control signal direct switching for the switching of power is high-speed stable, switch through hardwire control power, need not from taking the power, the price/performance ratio is higher, it delays to have solved current power supply switching circuit power switching response, thereby lead to switching failure and the higher problem of cost, the cost is reduced when having realized stable power switching function.
Fig. 2 is a schematic structural diagram of another power switching circuit provided by the embodiment of the present invention, as shown in fig. 2, optionally, the power switching circuit provided by the embodiment of the present invention further includes a first and logic circuit 17 and a second and logic circuit 18, the first input end 171 of the first and logic circuit 17 is electrically connected to the low voltage power supply 19, the second input end 172 of the first and logic circuit 17 is electrically connected to the entire car battery power supply 16, and the output end 173 of the first and logic circuit 17 is electrically connected to the control end 253 of the third switch unit 25. The first input 181 of the second and logic circuit 18 is electrically connected to the low-voltage power supply 19, the second input 182 of the second and logic circuit 18 is electrically connected to the vehicle battery power supply 16, and the output 183 of the second and logic circuit 18 is electrically connected to the control terminal 243 of the second switching unit 24. When both the first input terminal 171 and the second input terminal 172 of the first and logic circuit 17 are at a high level, the first and logic circuit 17 outputs a high level, otherwise, the first and logic circuit 17 outputs a low level; when both the first input 181 and the second input 182 of the second and logic circuit 18 are high, the second and logic circuit 18 outputs high, otherwise, the second and logic circuit 18 outputs low. Wherein, the low-voltage power supply 19 is obtained by reducing the voltage of the whole vehicle storage battery power supply 16.
Specifically, as shown in fig. 2, when the load 15 is a component such as a vehicle-mounted T-BOX, a lower voltage is required for power supply, and at this time, the entire vehicle battery power supply 16 is stepped down to obtain a low-voltage power supply 19, and the input end 122 of the second switching-on/off module 12 is electrically connected to the low-voltage power supply 19. Illustratively, the voltage of the low-voltage power supply 19 is a 5V power supply obtained by reducing the voltage of the entire vehicle storage battery power supply 16, for example, a voltage reduction chip is used to reduce the voltage output by the entire vehicle storage battery power supply 16, and the standby power supply 14 is a rechargeable battery with a voltage range of 4.2-5.5V.
Before the system is electrified for the first time, both the storage battery power supply 16 and the low-voltage power supply 19 of the whole vehicle are electroless, at the moment, the first switch unit 22 and the second switch unit 24 are cut off, the first field effect transistor 21 and the second field effect transistor 23 are closed, two power supply links where the first field effect transistor 21 and the second field effect transistor 23 are located are not conducted, no channel exists between the standby power supply 14 and the load 15, and the standby power supply 14 only carries out self-discharge. After the whole vehicle storage battery power supply 16 is powered on and ms-level time elapses, the low-voltage power supply 19 is at a high level, the second and logic circuit 18 outputs the high level to enable the second switch unit 24 to be switched on, so that the second field effect transistor 23 is switched on, and at the moment, the low-voltage power supply 19 supplies power to the load 15 through the second field effect transistor 23; the first and logic circuit 17 outputs a high level to turn off the third switching unit 25 and the first switching unit 22, thereby turning off the first field effect transistor 21, and there is no path between the standby power supply 14 and the load 15, so that the load 15 is supplied with power from the low voltage power supply 19. When the power supply 16 of the storage battery of the whole vehicle is powered off, the second switching unit 24 is cut off, the second field effect transistor 23 is cut off, and no passage exists between the low-voltage power supply 19 and the load 15; meanwhile, the third switching unit 25 is turned on, the control source unit 26 controls the first switching unit 22 to be turned on, the first field effect transistor 21 is turned on, and the standby power supply 14 supplies power to the load 15 through the first field effect transistor 21, so that the load 15 is supplied with power by the standby power supply 14. When the vehicle battery power supply 16 is recovered, the vehicle battery power supply 16 outputs a high level, and the low-voltage power supply 19 outputs a high level after ms-level time due to time delay, and at this time, the power supply switching circuit switches the load 15 back to a state of being powered by the low-voltage power supply 19.
To sum up, when the whole vehicle storage battery power supply 16 recovers the power supply, the whole vehicle storage battery power supply 16 outputs a high level, due to time delay, the low-voltage power supply 19 starts to output the high level after ms-level time, at this time, the power supply switching circuit switches the system back to the state that the low-voltage power supply 19 supplies power to the load 15, at this time, because the first and logic circuit 17 and the second and logic circuit 18 perform and logic operation on the whole vehicle storage battery power supply 16 and the low-voltage power supply 19, when the load 15 is switched back to be supplied with power by the low-voltage power supply 19 through the standby power supply 14, the output of the low-voltage power supply 19 is already stable, and therefore the power supply of the load 15 can be switched. The embodiment of the utility model provides a power supply switching circuit is through adopting first and logic circuit 17 and second and logic circuit 18 for when power supply switching circuit switched load 15 back to by the power supply of stand-by power supply 14, low voltage power supply 19's output has been stabilized, thereby makes the power supply of load 15 can stably switch.
Optionally, as shown in fig. 1 and fig. 2, the control module 13 further includes a diode 27, an anode of the diode 27 is electrically connected to the control terminal 253 of the third switching unit 25, and a cathode of the diode 27 is electrically connected to the vehicle battery power supply 16. When the vehicle storage battery power supply 16 is electrified, the diode 27 is cut off, and the third switching unit 25 is ensured to be closed. In addition, the diode 27 can prevent the reverse connection of the power supply and reduce the sneak loop, thereby preventing the crosstalk current from flowing back to the control source unit 26 through the third switch unit 25 to damage the system when the whole vehicle storage battery power supply 16 has crosstalk.
Optionally, the first switch unit 22 is a field effect transistor or a triode, the second switch unit 24 is a field effect transistor or a triode, and the third switch unit 25 is a field effect transistor or a triode.
Illustratively, with continued reference to fig. 1 and 2, the first switching unit 22 is a first NPN transistor, the second switching unit 24 is a second NPN transistor, the third switching unit 25 is a PNP transistor, and the first field-effect transistor 21 and the second field-effect transistor 23 are a first PMOS transistor and a second PMOS transistor, respectively. Wherein, a collector of the first NPN transistor serves as the input terminal 221 of the first switching unit 22, an emitter of the first NPN transistor serves as the output terminal 222 of the first switching unit 22, and a base of the first NPN transistor serves as the control terminal 223 of the first switching unit 22; a collector of the second NPN transistor serves as the input terminal 241 of the second switching unit 24, an emitter of the second NPN transistor serves as the output terminal 242 of the second switching unit 24, and a base of the second NPN transistor serves as the control terminal 243 of the second switching unit 24; an emitter of the PNP triode is used as the input terminal 252 of the third switching unit 25, a collector of the PNP triode is used as the output terminal 251 of the third switching unit 25, and a base of the PNP triode is used as the control terminal 253 of the third switching unit 25; the drain of the first PMOS transistor serves as the input terminal 211 of the first field effect transistor 21, the source of the first PMOS transistor serves as the output terminal 212 of the first field effect transistor 21, and the gate of the first PMOS transistor serves as the control terminal 213 of the first field effect transistor 21; the source of the second PMOS transistor is used as the output terminal 232 of the second field effect transistor 23, the drain of the second PMOS transistor is used as the input terminal 231 of the second field effect transistor 23, and the gate of the second PMOS transistor is used as the control terminal 233 of the second field effect transistor 23.
Before the system is powered on for the first time, the power supply 16 of the storage battery of the whole vehicle is free of electricity, at the moment, the base levels of the first NPN triode and the second NPN triode are both low levels, the first NPN triode and the second NPN triode are cut off, the first PMOS tube and the second PMOS tube are closed, two power supply links where the first PMOS tube and the second PMOS tube are located are not conducted, a passage does not exist between the standby power supply 14 and the load 15, and the standby power supply 14 only carries out self-discharge. When the whole vehicle storage battery power supply 16 is powered on, the whole vehicle storage battery power supply 16 provides a high level to the base electrode of the second NPN triode, the second NPN triode is conducted, so that a low level is provided to the grid electrode of the second PMOS tube, the source electrode and the drain electrode of the second PMOS tube are conducted, and the low-voltage power supply 19 supplies power to the load 15 through the second PMOS tube; the vehicle battery power supply 16 provides a high level to the control end 132 of the control module 13, the diode 27 is cut off, the control source unit 26 provides a high level signal to the emitter of the PNP triode, the base of the PNP triode is a high level, the PNP triode is cut off, so that the base of the first NPN triode is closed for a low level, thereby closing the first PMOS transistor, and no path exists between the standby power supply 14 and the load 15, so that the load 15 is supplied with power by the low-voltage power supply 19. When the power supply 16 of the whole vehicle storage battery is powered off, the power supply 16 of the whole vehicle storage battery provides a low level to the base electrode of the second NPN triode, and the second NPN triode is closed, so that the second PMOS tube is closed, and the low-voltage power supply 19 is not conducted with the load 15; the base electrode of the PNP triode is at a low level, the PNP triode is turned on, a high-level signal provided by the control source unit 26 is transmitted to the base electrode of the first NPN triode through the PNP triode, the first NPN triode is turned on, the grid electrode of the first PMOS tube is at a low level, the first PMOS tube is turned on, and the standby power supply 14 supplies power to the load 15 through the first PMOS tube, so that power switching of the whole vehicle storage battery power supply 16 during failure is realized. When the whole vehicle storage battery power supply 16 recovers, the whole vehicle storage battery power supply 16 outputs a high level, the second NPN triode is conducted, the source electrode and the drain electrode of the second PMOS tube are conducted, and the low-voltage power supply 19 supplies power to the load 15 through the second PMOS tube; meanwhile, the PNP triode is turned off, the first NPN triode and the first PMOS transistor are turned off, there is no path between the standby power supply 14 and the load 15, and the low-voltage power supply 19 resumes power supply. The PNP triode and the first NPN triode form inverse logic, so that when the first NPN triode and the second NPN triode are controlled by using the single control source of the vehicle storage battery power supply 16, the switching states of the first NPN triode and the second NPN triode are opposite.
Optionally, the source of the first PMOS transistor is used as the input end 211 of the first field effect transistor 21, and the drain of the first PMOS transistor is used as the output end 212 of the first field effect transistor 21; or, the drain of the second PMOS transistor is used as the output 232 of the second field effect transistor 23, and the source of the second PMOS transistor is used as the input 231 of the second field effect transistor 23, which is not limited by the present invention.
The embodiment of the utility model provides a power supply switching circuit is through adopting discrete components such as field effect transistor or triode as first switch unit 22, second switch unit 24 and third switch unit 25, by hardwire transmission control signal, when the system falls the electricity, directly switches by hardwire transmission control signal to realize high-speed stable power switching, and realized low-cost power supply switching circuit. The field effect transistor is good in temperature stability and strong in anti-interference capability; the adoption of the triode can further reduce the cost. The utility model discloses do not limit to the type of field effect transistor and the triode that adopts in the power switching circuit, the field of technical personnel can carry out various obvious changes, adjustment and substitution and can not break away from this the utility model discloses a protection scope.
Optionally, with continued reference to fig. 1 and 2, the first switching module 11 further comprises a first clamping circuit 28, and the second switching module 12 further comprises a second clamping circuit 29. First end 281 of first clamp 28 is electrically connected to input terminal 211 or output terminal 212 of first field effect transistor 21, and second end 282 of first clamp 28 is electrically connected to control terminal 213 of first field effect transistor 21 and input terminal 221 of first switch unit 22. The first terminal 291 of the second clamp circuit 29 is electrically connected to the input terminal 231 or the output terminal 232 of the second field effect transistor 23, and the second terminal 292 of the second clamp circuit 29 is electrically connected to the control terminal 233 of the second field effect transistor 23 and the input terminal 241 of the second switching unit 24.
Illustratively, as shown in fig. 1 and fig. 2, the first field effect transistor 21 and the second field effect transistor 23 are a first PMOS transistor and a second PMOS transistor, respectively, a drain of the first PMOS transistor serves as an input terminal 211 of the first field effect transistor 21, a source of the first PMOS transistor serves as an output terminal 212 of the first field effect transistor 21, and a gate of the first PMOS transistor serves as a control terminal 213 of the first field effect transistor 21; the source of the second PMOS transistor is used as the output terminal 232 of the second field effect transistor 23, the drain of the second PMOS transistor is used as the input terminal 231 of the second field effect transistor 23, and the gate of the second PMOS transistor is used as the control terminal 233 of the second field effect transistor 23. The first end 281 of the first clamp circuit 28 is electrically connected to the source of the first PMOS transistor, the second end 282 of the first clamp circuit 28 is electrically connected to the gate of the first PMOS transistor and the input end 221 of the first switch unit 22, the first clamp circuit 28 is configured to ensure that when the first PMOS transistor is in an off state, a voltage difference between the source and the gate of the first PMOS transistor is stable, so as to avoid the first PMOS transistor being turned on by mistake, and the first clamp circuit 28 may include a resistor and a capacitor, where the capacitor can store transient pulse energy, so that the state of the first PMOS transistor is more stable. Similarly, the first end 291 of the second clamp circuit 29 is electrically connected to the source of the second PMOS transistor, the second end 292 of the second clamp circuit 29 is electrically connected to the gate of the second PMOS transistor and the input end 241 of the second switch unit 24, and the second clamp circuit 29 is configured to ensure that when the second PMOS transistor is in the off state, the voltage difference between the source and the gate of the second PMOS transistor is stable, thereby preventing the second PMOS transistor from being turned on by mistake, and the second clamp circuit 29 may include a resistor and a capacitor, where the capacitor can store transient pulse energy, so that the state of the second PMOS transistor is more stable.
The embodiment of the utility model provides a power supply switching circuit, through setting up first clamp 28 between first field effect transistor 21's source electrode and grid, guarantee that first field effect transistor 21 is stable at the voltage difference between off-state source electrode and the grid, set up second clamp 29 between second field effect transistor 23's source electrode and grid, guarantee that second field effect transistor 23 is stable at the voltage difference between off-state source electrode and the grid, thereby guarantee the stable opening or the shutoff of first field effect transistor 21 and second field effect transistor 23.
Fig. 3 is a schematic structural diagram of another power switching circuit provided by an embodiment of the present invention, as shown in fig. 3, optionally, the first on-off module 11 further includes a third field effect transistor 30, an input end 301 of the third field effect transistor 30 is electrically connected to an output end 212 of the first field effect transistor 21, an output end 302 of the third field effect transistor 30 is electrically connected to the load 15, and a control end 303 of the third field effect transistor 30 is electrically connected to an input end 221 of the first switch unit 22.
Based on the same principle as the foregoing embodiment, when the first field effect transistor 21 is turned on, the third field effect transistor 30 is also turned on, and when the first field effect transistor 21 is turned off, the third field effect transistor 30 is also turned off, so as to switch the power supply of the load 15.
Illustratively, as shown in fig. 3, the first field effect transistor 21 and the third field effect transistor 30 are a first PMOS transistor and a third PMOS transistor, respectively, a drain of the first PMOS transistor serves as the input terminal 211 of the first field effect transistor 21, a source of the first PMOS transistor serves as the output terminal 212 of the first field effect transistor 21, and a gate of the first PMOS transistor serves as the control terminal 213 of the first field effect transistor 21; the source of the third PMOS transistor serves as the input terminal 301 of the third field effect transistor 30, the drain of the third PMOS transistor serves as the output terminal 302 of the third field effect transistor 30, and the gate of the third PMOS transistor serves as the control terminal 303 of the third field effect transistor 30. The parasitic body diodes in the first PMOS tube and the third PMOS tube can prevent a leakage current loop, and the problem that the service life of the standby power supply 14 is shortened due to leakage current is solved.
The embodiment of the utility model provides a through chooseing for use two field effect transistors of first field effect transistor 21 and third field effect transistor 30, utilize parasitic body diode's among the field effect transistor characteristic, avoid the leakage current return circuit to solve stand-by power supply 14 and caused the problem of product life reduction because the leakage current.
Optionally, with continued reference to fig. 3, the first switching module 11 further includes a third clamping circuit 31, a first end 311 of the third clamping circuit 31 is electrically connected to the control end 213 of the first field effect transistor 21, a second end 312 of the third clamping circuit 31 is electrically connected to the input end 211 of the first field effect transistor 21 and the output end 302 of the third field effect transistor 30, or a second end 312 of the third clamping circuit 31 is electrically connected to the output end 212 of the first field effect transistor 21 and the input end 301 of the third field effect transistor 30, a third end 313 of the third clamping circuit 31 is electrically connected to the control end 303 of the third field effect transistor 30, and a fourth end 314 of the third clamping circuit 31 is electrically connected to the input end 221 of the first switching unit 22.
Illustratively, as shown in fig. 3, the first field effect transistor 21 and the third field effect transistor 30 are a first PMOS transistor and a third PMOS transistor, respectively, a drain of the first PMOS transistor serves as the input terminal 211 of the first field effect transistor 21, a source of the first PMOS transistor serves as the output terminal 212 of the first field effect transistor 21, and a gate of the first PMOS transistor serves as the control terminal 213 of the first field effect transistor 21; the source of the third PMOS transistor serves as the input terminal 301 of the third field effect transistor 30, the drain of the third PMOS transistor serves as the output terminal 302 of the third field effect transistor 30, and the gate of the third PMOS transistor serves as the control terminal 303 of the third field effect transistor 30. The first end 311 of the third clamping circuit 31 is electrically connected to the gate of the first PMOS transistor, the second end 312 of the third clamping circuit 31 is electrically connected to the source of the first PMOS transistor and the source of the third PMOS transistor, the third end 313 of the third clamping circuit 31 is electrically connected to the gate of the third PMOS transistor, and the fourth end 314 of the third clamping circuit 31 is electrically connected to the input end 221 of the first switch unit 22. The third clamp circuit 31 is used for ensuring that when the first PMOS transistor and the third PMOS transistor are in the off state, the voltage difference between the source electrode and the gate electrode of the first PMOS transistor is stable, and the voltage difference between the source electrode and the gate electrode of the third PMOS transistor is stable, so that the first PMOS transistor and the third PMOS transistor are prevented from being mistakenly opened, and the third clamp circuit 31 may include a resistor and a capacitor, wherein the capacitor can store transient pulse energy, so that the states of the first PMOS transistor and the third PMOS transistor are more stable.
The embodiment of the utility model provides a power supply switching circuit through setting up third clamp circuit 31, guarantees that first field effect transistor 21 is stable at the voltage difference between off-state source electrode and the grid, guarantees that third field effect transistor 30 is stable at the voltage difference between off-state source electrode and the grid to guarantee that first field effect transistor 21 and third field effect transistor 30 are stable to be opened or turn-off.
Fig. 4 is a schematic structural diagram of a control source unit according to an embodiment of the present invention, as shown in fig. 4, optionally, the control source unit 26 includes an energy storage circuit 41 and a first resistor 42, an input terminal 411 of the energy storage circuit 41 is electrically connected to the vehicle battery power supply 16, an output terminal 412 of the energy storage circuit 41 is electrically connected to a first terminal 421 of the first resistor 42, and a second terminal 422 of the first resistor 42 is electrically connected to an input terminal 252 of the third switch unit 25. The energy storage circuit 41 comprises an energy storage capacitor 43, a first end 431 of the energy storage capacitor 43 is electrically connected with the entire vehicle storage battery power supply 16, and a second end 432 of the energy storage capacitor 43 is grounded.
When the vehicle storage battery power supply 16 is powered off, the vehicle storage battery power supply 16 is not electrified, so that the second switching unit 24 is cut off, the second field effect transistor 23 is cut off, and the low-voltage power supply 19 and the load 15 are disconnected; the third switching unit 25 is switched on when the whole vehicle storage battery power supply 16 is not electrified, at the moment, the energy storage circuit 41 can keep a short-time high-level output due to the discharge of the energy storage capacitor 43, the output of the control source unit 26 is pulled up to a high level through the first resistor 42, the control source unit 26 controls the first switching unit 22 to be switched on, the first field effect transistor 21 is switched on, the standby power supply 14 supplies power to the load 15 through the first field effect transistor 21, and the power supply of the load 15 by the standby power supply 14 is realized.
Illustratively, with continued reference to fig. 1, 2 and 4, the first switching unit 22 is a first NPN transistor, the third switching unit 25 is a PNP transistor, and the first field effect transistor 21 is a first PMOS transistor. Wherein, a collector of the first NPN transistor serves as the input terminal 221 of the first switching unit 22, an emitter of the first NPN transistor serves as the output terminal 222 of the first switching unit 22, and a base of the first NPN transistor serves as the control terminal 223 of the first switching unit 22; an emitter of the PNP triode is used as the input terminal 252 of the third switching unit 25, a collector of the PNP triode is used as the output terminal 251 of the third switching unit 25, and a base of the PNP triode is used as the control terminal 253 of the third switching unit 25; the drain of the first PMOS transistor serves as the input terminal 211 of the first field effect transistor 21, the source of the first PMOS transistor serves as the output terminal 212 of the first field effect transistor 21, and the gate of the first PMOS transistor serves as the control terminal 213 of the first field effect transistor 21.
When the power supply 16 of the storage battery of the whole vehicle is powered off, the base of the PNP triode is at a low level, the PNP triode is turned on, at this time, the energy storage capacitor 43 discharges, the energy storage circuit 41 can keep high level output, and the first resistor 42 pulls up the output of the control source unit 26 to a high level, so that a high level signal output by the control source unit 26 is transmitted to the base of the first NPN triode through the PNP triode, the first NPN triode is turned on, the gate of the first PMOS transistor is at a low level, the first PMOS transistor is turned on, and the standby power supply 14 supplies power to the load 15 through the first PMOS transistor, thereby realizing power switching when the power supply 16 of the storage battery of the whole vehicle fails.
Optionally, the energy storage circuit 41 further includes a Power conversion module 45, an input end 451 of the Power conversion module 45 is electrically connected to the entire vehicle battery Power supply 16, an output end 452 of the Power conversion module 45 is electrically connected to an input end 421 of the first resistor 42, the Power conversion module 45 is configured to convert a high voltage of the entire vehicle battery Power supply 16 into a suitable low voltage, exemplarily, the Power conversion module 45 is a Power integrated circuit (Power IC), the energy storage circuit 41 is implemented by using an original Power integrated circuit inside the vehicle, an additional circuit structure is not required to be additionally added, and therefore the occupied space and the cost of the Power switching circuit are reduced.
Fig. 5 is a schematic structural diagram of another control source unit according to an embodiment of the present invention, as shown in fig. 5, optionally, the control source unit 26 includes an energy storage circuit 41 and a control unit 44, an input terminal 411 of the energy storage circuit 41 is electrically connected to the vehicle battery power supply 16, an output terminal 412 of the energy storage circuit 41 is electrically connected to an input terminal 441 of the control unit 44, and an output terminal 442 of the control unit 44 is electrically connected to an input terminal 252 of the third switch unit 25. The energy storage circuit 41 comprises an energy storage capacitor 43, a first end 431 of the energy storage capacitor 43 is electrically connected with the entire vehicle storage battery power supply 16, and a second end 432 of the energy storage capacitor 43 is grounded.
When the vehicle storage battery power supply 16 is powered off, the vehicle storage battery power supply 16 is not electrified, so that the second switching unit 24 is cut off, the second field effect transistor 23 is cut off, and the low-voltage power supply 19 and the load 15 are disconnected; the third switching unit 25 is switched on when the whole vehicle storage battery power supply 16 is not electrified, at the moment, the energy storage circuit 41 can keep short-time high-level output due to the discharge of the energy storage capacitor 43 so as to supply power to the control unit 44, the control unit 44 outputs a high-level signal, the control source unit 26 controls the first switching unit 22 to be switched on, the first field effect transistor 21 is switched on, the standby power supply 14 supplies power to the load 15 through the first field effect transistor 21, and the power supply of the load 15 by the standby power supply 14 is realized.
Illustratively, with continued reference to fig. 1, 2 and 5, the first switching unit 22 is a first NPN transistor, the third switching unit 25 is a PNP transistor, and the first field effect transistor 21 is a first PMOS transistor. Wherein, a collector of the first NPN transistor serves as the input terminal 221 of the first switching unit 22, an emitter of the first NPN transistor serves as the output terminal 222 of the first switching unit 22, and a base of the first NPN transistor serves as the control terminal 223 of the first switching unit 22; an emitter of the PNP triode is used as the input terminal 252 of the third switching unit 25, a collector of the PNP triode is used as the output terminal 251 of the third switching unit 25, and a base of the PNP triode is used as the control terminal 253 of the third switching unit 25; the drain of the first PMOS transistor serves as the input terminal 211 of the first field effect transistor 21, the source of the first PMOS transistor serves as the output terminal 212 of the first field effect transistor 21, and the gate of the first PMOS transistor serves as the control terminal 213 of the first field effect transistor 21.
When the power failure of the storage battery power supply 16 of the whole vehicle occurs, the base of the PNP triode is at a low level, the PNP triode is turned on, at this time, the energy storage capacitor 43 discharges, the energy storage circuit 41 can keep a high level output to supply power to the control unit 44, and the control unit 44 outputs a high level signal, so that the high level signal output by the control source unit 26 is transmitted to the base of the first NPN triode through the PNP triode, the first NPN triode is turned on, the gate of the first PMOS transistor is at a low level, the first PMOS transistor is turned on, and the standby power supply 14 supplies power to the load 15 through the first PMOS transistor, thereby realizing the power switching when the storage battery power supply 16 of the whole vehicle fails.
Optionally, the control unit 44 is a Micro Control Unit (MCU), so as to reduce the occupied space of the power switching circuit.
Optionally, the energy storage circuit 41 further includes a power conversion module 45, an input end 451 of the power conversion module 45 is electrically connected to the entire vehicle battery power supply 16, an output end 452 of the power conversion module 45 is electrically connected to an input end 441 of the control unit 44, and the power conversion module 45 is configured to convert a high voltage of the entire vehicle battery power supply 16 into a low voltage required by the control unit 44. Illustratively, the Power conversion module 45 is a Power integrated circuit (Power IC), and by using the Power IC originally in the vehicle as the energy storage circuit 41, an additional circuit structure is not required, so as to reduce the occupied space and cost of the Power switching circuit.
The embodiment of the utility model provides a power supply switching circuit can realize multiple function setting through adopting the control unit 44 for the switching of power is more nimble, and like the default high level of the output of control unit 44, when the vehicle system is in suicide sleep mode, the control unit 44 turn-offs output and guarantees that power supply switching circuit can forbid, thereby reduces the sneak loop, and wherein, the whole dormancy mode that falls of suicide sleep mode vehicle controller nevertheless can be awakened up.
Optionally, the entire vehicle storage battery power supply 16 includes an anti-reverse connection circuit and/or a filter circuit, and on the premise of ensuring real-time performance of the entire vehicle storage battery power supply 16, stability and reliability of the power supply switching circuit are ensured.
The embodiment of the utility model provides a power supply switching circuit, through control module 13 according to whole car battery power 16 go up the electricity or the first break-make module 11 disconnection of power down control or switch on to realize load 15's power switching. The embodiment of the utility model provides a power supply switching circuit through whole car battery power 16 and these two hard wire control sources of low voltage power supply 19, guarantees the real-time of power supply switching, switches through hard wire control power, need not from the electrified source, thereby has solved the delay problem that leads to switching failure and cost are higher of current power supply switching circuit power switching response, the cost is reduced when having realized stable power switching function.
Based on the same inventive concept, the embodiment of the present invention further provides a vehicle, which includes any one of the power switching circuits described in the above embodiments, and the explanation of the same or corresponding structures and terms as those in the above embodiments is not repeated herein.
Wherein, the embodiment of the utility model provides a vehicle still can include other subassemblies that are used for realizing vehicle operation function, for example whole car battery power, stand-by power supply etc. the utility model discloses do not limit to this, technical personnel in the field can carry out various changes, adjustment and substitute and do not deviate from the utility model discloses a protection scope.
The embodiment of the utility model provides a vehicle builds power supply switching circuit through discrete component, by hard wire transmission control signal, and the real-time is high. The control module 13 is adopted to assist in controlling the first on-off module 11, so that the loss of the standby power supply is effectively reduced. The stability of the mutual switching of the power supplies is ensured through the logic circuit, so that the stability of internal parameters and low cost are realized.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A power switching circuit, comprising:
the device comprises a first on-off module, a second on-off module and a control module;
the control end of the first on-off module is electrically connected with the output end of the control module, the input end of the first on-off module is electrically connected with the standby power supply, and the output end of the first on-off module is electrically connected with the load;
the control end of the second on-off module is electrically connected with a power supply of a storage battery of the whole vehicle, the input end of the second on-off module is electrically connected with a low-voltage power supply, and the output end of the second on-off module is electrically connected with a load;
the control end of the control module is electrically connected with a power supply of a storage battery of the whole vehicle;
the low-voltage power supply is obtained by reducing the voltage of the whole vehicle storage battery power supply.
2. The power switching circuit according to claim 1, wherein the first switching module comprises a first field effect transistor and a first switching unit;
the second switching-off module comprises a second field effect transistor and a second switching unit;
the control module comprises a third switching unit and a control source unit;
the input end of the first field effect transistor is used as the input end of the first on-off module and is electrically connected with a standby power supply, and the output end of the first field effect transistor is used as the output end of the first on-off module and is electrically connected with a load;
the input end of the second field effect transistor is used as the input end of the second on-off module and is electrically connected with a low-voltage power supply, and the output end of the second field effect transistor is used as the output end of the second on-off module and is electrically connected with a load;
the input end of the first switch unit is electrically connected with the control end of the first field effect transistor, the output end of the first switch unit is grounded, the control end of the first switch unit is used as the control end of the first on-off module and is electrically connected with the output end of the control module, and the output end of the third switch unit is used as the output end of the control module;
the input end of the second switch unit is electrically connected with the control end of the second field effect transistor, the output end of the second switch unit is grounded, and the control end of the second switch unit is used as the control end of the second on-off module and is electrically connected with a storage battery power supply of the whole vehicle;
the input end of the third switch unit is electrically connected with the control source unit, and the control end of the third switch unit is used as the control end of the control module and is electrically connected with the whole vehicle storage battery power supply.
3. The power switching circuit of claim 2, wherein the control module further comprises a diode;
the positive pole of the diode is electrically connected with the control end of the third switch unit, and the negative pole of the diode is electrically connected with the whole vehicle storage battery power supply.
4. The power switching circuit of claim 2, further comprising a first and logic circuit and a second and logic circuit;
the first input end of the first and logic circuit is electrically connected with the low-voltage power supply, the second input end of the first and logic circuit is electrically connected with the power supply of the whole vehicle storage battery, and the output end of the first and logic circuit is electrically connected with the control end of the third switch unit;
the first input end of the second and logic circuit is electrically connected with a low-voltage power supply, the second input end of the second and logic circuit is electrically connected with the power supply of the whole vehicle storage battery, and the output end of the second and logic circuit is electrically connected with the control end of the second switch unit.
5. The power switching circuit of claim 2, wherein the first switching module further comprises a first clamping circuit;
the second on-off module further comprises a second clamping circuit;
a first end of the first clamping circuit is electrically connected with an input end or an output end of the first field effect transistor, and a second end of the first clamping circuit is electrically connected with a control end of the first field effect transistor and an input end of the first switching unit;
the first end of the second clamping circuit is electrically connected with the input end or the output end of the second field effect transistor, and the second end of the second clamping circuit is electrically connected with the control end of the second field effect transistor and the input end of the second switch unit.
6. The power switching circuit of claim 2, wherein the first switching module further comprises a third field effect transistor;
the input end of the third field effect transistor is electrically connected with the output end of the first field effect transistor, the output end of the third field effect transistor is electrically connected with the load, and the control end of the third field effect transistor is electrically connected with the input end of the first switch unit.
7. The power switching circuit of claim 6, wherein the first switching module further comprises a third clamping circuit;
the first end of the third clamping circuit is electrically connected with the control end of the first field effect transistor;
a second end of the third clamp circuit is electrically connected with the input end of the first field effect transistor and the output end of the third field effect transistor, or the second end of the third clamp circuit is electrically connected with the output end of the first field effect transistor and the input end of the third field effect transistor;
the third end of the third clamping circuit is electrically connected with the control end of the third field effect transistor, and the fourth end of the third clamping circuit is electrically connected with the input end of the first switching unit.
8. The power supply switching circuit according to claim 2, wherein the control source unit includes a tank circuit and a first resistor;
the input end of the energy storage circuit is electrically connected with a power supply of a storage battery of the whole vehicle, the output end of the energy storage circuit is electrically connected with the first end of the first resistor, and the second end of the first resistor is electrically connected with the input end of the third switch unit;
wherein the energy storage circuit comprises an energy storage capacitor;
the first end of the energy storage capacitor is electrically connected with the whole vehicle storage battery power supply, and the second end of the energy storage capacitor is grounded.
9. The power supply switching circuit according to claim 2, wherein the control source unit includes a tank circuit and a control unit;
the input end of the energy storage circuit is electrically connected with a power supply of a storage battery of the whole vehicle, the output end of the energy storage circuit is electrically connected with the input end of the control unit, and the output end of the control unit is electrically connected with the input end of the third switch unit;
wherein the energy storage circuit comprises an energy storage capacitor;
the first end of the energy storage capacitor is electrically connected with the whole vehicle storage battery power supply, and the second end of the energy storage capacitor is grounded.
10. A vehicle characterized in that the vehicle includes the power supply switching circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920946684.2U CN210122054U (en) | 2019-06-21 | 2019-06-21 | Power supply switching circuit and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920946684.2U CN210122054U (en) | 2019-06-21 | 2019-06-21 | Power supply switching circuit and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN210122054U true CN210122054U (en) | 2020-03-03 |
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Family Applications (1)
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|---|---|---|---|
| CN201920946684.2U Active CN210122054U (en) | 2019-06-21 | 2019-06-21 | Power supply switching circuit and vehicle |
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|---|---|
| CN (1) | CN210122054U (en) |
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2019
- 2019-06-21 CN CN201920946684.2U patent/CN210122054U/en active Active
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hengrun Technology Co., Ltd Address before: 100101 Beijing city Chaoyang District Anxiang Beili 11 B block 8 layer Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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