CN115195642B - Power supply circuit of automatic driving controller - Google Patents
Power supply circuit of automatic driving controller Download PDFInfo
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- CN115195642B CN115195642B CN202211117493.8A CN202211117493A CN115195642B CN 115195642 B CN115195642 B CN 115195642B CN 202211117493 A CN202211117493 A CN 202211117493A CN 115195642 B CN115195642 B CN 115195642B
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- automatic driving
- external battery
- driving controller
- mos transistor
- mos tube
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- 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
- B60R16/033—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 characterised by the use of electrical cells or batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/36—Arrangements using end-cell switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
Abstract
The embodiment of the invention discloses a power supply circuit of an automatic driving controller, which comprises: the comparison unit comprises a first input end, a second input end and an output end, the first input end is connected with the vehicle body storage battery, and the second input end and the output end are both connected with an external battery; the first switch unit is respectively connected with the vehicle body storage battery, the output end and the power converter of the automatic driving controller; the second switch unit is respectively connected with the external battery, the output end and the power converter; when the vehicle body storage battery supplies power to the automatic driving controller, the first switch unit is switched on, and the second switch unit is switched off; when the vehicle body storage battery is disconnected with the automatic driving controller, the first switch unit is disconnected, the second switch unit is connected, the external battery supplies power to the automatic driving controller, and the technical problem that the power cannot be supplied to the automatic driving controller after the vehicle body storage battery is disconnected with the automatic driving controller is solved.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a power supply circuit of an automatic driving controller.
Background
According to the intelligent Internet of vehicles manufacturing enterprises and product admission management guidelines (trial implementation), which are issued by the ministry of industry and informatization, the vehicle enterprises need to submit relevant data to relevant departments in time after an accident occurs.
However, many automatic driving controllers on the market have no backup power supply, when an accident occurs, a vehicle body storage battery socket is loosened or a storage battery fails, the automatic driving controllers can stop working immediately because external power supply cannot be carried out, at the moment, the power supply in the automatic driving controllers is powered off immediately, meanwhile, the automatic driving controllers can stop immediately if data uploading or storing action is carried out, and even the storage units of the automatic driving controllers are damaged because of sudden power failure, so that the data at that moment can not be stored.
Therefore, how to ensure that the automatic driving controller is not powered off after the socket of the vehicle body storage battery is loosened or the storage battery fails is a technical problem to be solved urgently at present.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a power supply circuit of an automatic driving controller, aiming at solving the technical problem that the automatic driving controller is not powered off after a vehicle body storage battery socket is loosened or a storage battery fails in the prior art.
In order to solve the above problems, the present invention provides a power supply circuit of an automatic driving controller, comprising:
the comparison unit comprises a first input end, a second input end and an output end, the first input end is connected with the vehicle body storage battery, and the second input end and the output end are both connected with an external battery;
the first switch unit is respectively connected with the vehicle body storage battery, the output end and a power converter of the automatic driving controller;
a second switching unit connected to the external battery, the output terminal, and the power converter, respectively;
when the vehicle body storage battery supplies power to the automatic driving controller, the first switch unit is switched on, and the second switch unit is switched off; when the vehicle body storage battery is disconnected with the automatic driving controller, the first switch unit is disconnected, the second switch unit is connected, and the external battery supplies power to the automatic driving controller.
Preferably, in the power supply circuit of the automatic driving controller, the vehicle body storage battery is connected to the external battery to charge the external battery.
Preferably, in the power supply circuit of the automatic driving controller, the first switching unit includes: MOS transistor Q1, MOS transistor Q2 and MOS transistor Q3;
wherein, MOS pipe Q1's grid respectively with MOS pipe Q2's grid, MOS pipe Q3's drain electrode is connected, MOS pipe Q1's drain electrode with vehicle body battery connects, MOS pipe Q1's source electrode respectively with MOS pipe Q2's drain electrode MOS pipe Q3's drain electrode is connected, MOS pipe Q2's source electrode with power converter connects, MOS pipe Q3's grid respectively with the output the external battery is connected, MOS pipe Q3's source electrode ground connection.
Preferably, in the power supply circuit of the automatic driving controller, the second switching unit includes: MOS transistor Q4, MOS transistor Q5 and MOS transistor Q6;
wherein, MOS pipe Q4's grid respectively with MOS pipe Q5's grid, MOS pipe Q6's drain electrode is connected, MOS pipe Q4's drain electrode with external battery is connected, MOS pipe Q4's source electrode respectively with MOS pipe Q5's drain electrode, MOS pipe Q6's drain electrode is connected, MOS pipe Q5's source electrode with power converter connects, MOS pipe Q6's grid respectively with the output, external battery is connected, MOS pipe Q6's source electrode ground connection.
Preferably, in the power supply circuit of the automatic driving controller, the circuit further includes a third switching unit, and the third switching unit is connected to the external battery, the output terminal, and the first switching unit, respectively.
More preferably, in the power supply circuit of the automatic driving controller, the third switching unit includes a MOS transistor Q7;
the grid electrode of the MOS tube Q7 is respectively connected with the output end and the external battery, the drain electrode is respectively connected with the external battery and the first switch unit, and the source electrode is grounded.
Preferably, in the power supply circuit of the automatic driving controller, the circuit further includes a fourth switch unit, and the fourth switch unit is connected to the external battery, the output terminal, and the second switch unit, respectively.
More preferably, in the power supply circuit of the automatic driving controller, the fourth switching unit includes a MOS transistor Q8;
the grid electrode of the MOS tube Q8 is respectively connected with the output end and the external battery, the drain electrode is respectively connected with the external battery and the first switch unit, and the source electrode is grounded.
Preferably, in the power supply circuit of the automatic driving controller, the circuit further includes a first voltage dividing circuit, and the first voltage dividing circuit is connected to the first input terminal and the vehicle body storage battery, respectively.
Preferably, in the power supply circuit of the automatic driving controller, the circuit further includes a second voltage dividing circuit, and the second voltage dividing circuit is connected to the second input terminal and the external battery, respectively.
Compared with the prior art, the power supply circuit of the automatic driving controller provided by the embodiment of the invention has the advantages that the external battery is arranged in the circuit, the vehicle body storage battery and the external battery are sampled by the comparison unit, and the power supply of the vehicle body storage battery and the external battery to the automatic driving controller is controlled by the first switch unit and the second switch unit, so that the technical problem that the power cannot be supplied to the automatic driving controller after the vehicle body storage battery and the automatic driving controller are disconnected is solved, and the data safety of a user is ensured. In addition, the external battery can be arranged in the cab, so that the damage of the external battery caused by external collision of the automobile is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a block diagram of a prior art power supply circuit for an autopilot controller;
FIG. 2 is a block diagram of a power supply circuit for an autopilot controller according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a power supply circuit for an autopilot controller provided by an embodiment of the present invention;
fig. 4 is a schematic diagram of a power supply circuit of an automatic driving controller according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, fig. 1 is a block diagram of a power supply circuit of an automatic driving controller according to the prior art. As shown in fig. 1, in the power supply circuit of the automatic driving controller provided by the prior art, only the vehicle body storage battery 40 supplies power to the automatic driving controller, after the battery BATT enters the controller, the capacitor C1 and the capacitor C2 play a filtering role, the diode D1 is an anti-reverse diode, so as to prevent the circuit from being burnt out when the system power supply is reversely connected, and the diode D2 is a TVS tube, so that the amplitude of the battery BATT can be ensured not to be too large, and further, the following IC and components are prevented from being burnt out.
In the embodiment shown in fig. 1, the POWER supply of the automatic driving controller is supplied by the vehicle body storage battery 40, when the socket J2 is damaged or the vehicle body storage battery 40 is damaged, because no backup POWER supply takes over, the POWER converter (POWER converter) 60 of the automatic driving controller stops supplying POWER to all modules of the automatic driving controller because no POWER supply exists, so that the automatic driving controller cannot work and cannot store current data, meanwhile, the maximum POWER supply of a diode of one vehicle gauge level at present is dozens of amperes, the POWER supply requirement of dozens of amperes of current cannot be met, and the current provided by the diode D1 cannot meet the requirement of large current of the automatic driving controller.
Referring to fig. 2, fig. 2 is a block diagram of a power supply circuit of an automatic driving controller according to an embodiment of the present invention. As shown in fig. 2, a power supply circuit of an automatic driving controller includes:
the comparison unit 10 comprises a first input end, a second input end and an output end, wherein the first input end is connected with the vehicle body storage battery 40, and the second input end and the output end are both connected with the external battery 50;
a first switch unit 20, wherein the first switch unit 20 is connected to the vehicle body battery 40, the output terminal, and a power converter 60 of the automatic driving controller, respectively;
a second switching unit 30, wherein the second switching unit 30 is respectively connected to the external battery 50, the output terminal, and the power converter 60;
when the vehicle body storage battery 40 supplies power to the automatic driving controller, the first switch unit 20 is turned on, and the second switch unit 30 is turned off; when the vehicle body battery 40 is disconnected from the automatic driving controller, the first switch unit 20 is turned off, the second switch unit 30 is turned on, and the external battery 50 supplies power to the automatic driving controller.
Specifically, the comparison unit 10 is connected to the vehicle body battery 40 and the external battery 50 through a first input end and a second input end, respectively, so as to sample the voltage values of the vehicle body battery 40 and the external battery 50 to control output power supply. When the power converter 60 of the automatic driving controller is disconnected from the vehicle body storage battery 40, the level at the output end of the comparison unit 10 changes, at this time, the first switch unit 20 is disconnected, the second switch unit 30 is connected, and the external battery 50 can supply power to the automatic driving controller.
The comparison unit 10 mentioned in the embodiment of the present application preferably includes a voltage comparator, so that the voltage value of the voltage drop of the vehicle body storage battery 40 can be accurately set to switch the external battery 50 to supply power to the automatic driving controller, thereby protecting the normal operation of the system.
In addition, the comparing unit 10 may also be a current comparator, which may be selected according to a specific application, and is not specifically limited in this embodiment.
In some embodiments, as shown in fig. 3 and 4, the body battery 40 is connected to the external battery 50 to charge the external battery 50. Specifically, the vehicle body storage battery 40 is connected with the external battery 50 through the plug-ins J1 and J2, so that the external battery 50 can be charged by the vehicle battery BATT, and the electric quantity of the external battery 50 is ensured to be durable.
In some embodiments, as shown in fig. 3 and 4, the first switching unit 20 includes: MOS tube Q1, MOS tube Q2 and MOS tube Q3; the grid of the MOS transistor Q1 is connected to the grid of the MOS transistor Q2 and the drain of the MOS transistor Q3, the drain of the MOS transistor Q1 is connected to the vehicle body storage battery 40, the source of the MOS transistor Q1 is connected to the drain of the MOS transistor Q2 and the drain of the MOS transistor Q3, the source of the MOS transistor Q2 is connected to the power converter 60, the grid of the MOS transistor Q3 is connected to the output terminal and the external battery 50, and the source of the MOS transistor Q3 is grounded; the second switching unit 30 includes: MOS transistor Q4, MOS transistor Q5 and MOS transistor Q6; wherein, MOS pipe Q4's grid respectively with MOS pipe Q5's grid, MOS pipe Q6's drain electrode is connected, MOS pipe Q4's drain electrode with external battery 50 is connected, MOS pipe Q4's source electrode respectively with MOS pipe Q5's drain electrode, MOS pipe Q6's drain electrode is connected, MOS pipe Q5's source electrode with power converter 60 is connected, MOS pipe Q6's grid respectively with the output end external battery 50 is connected, MOS pipe Q6's source electrode ground connection.
Specifically, in the embodiment shown in fig. 3 and 4, the capacitor C1 and the capacitor C2 both play a role of filtering in a circuit, the diode D1 is a TVS tube, which can protect a back-end circuit and components from being damaged due to sudden change of BATT when the amplitude of the battery BATT is suddenly increased, the comparing unit 10 is a voltage comparator U1, and a positive input end and a negative input end of the voltage comparator U1 can be used as a first input end and a second input end of the comparing unit 10.
In the embodiment shown in fig. 3, the positive input terminal of the voltage comparator U1 samples the voltage of the external battery 50 and serves as a reference voltage, and the negative input terminal of the voltage comparator U1 samples the voltage of the vehicle body storage battery 40. When the automatic driving controller is powered by the vehicle body storage battery 40, the voltage value of the negative input end of the voltage comparator U1 is larger than the voltage value of the positive input end of the voltage comparator U1, at the moment, the output end of the voltage comparator U1 outputs low level, the MOS tube Q4, the MOS tube Q5 and the MOS tube Q6 are not conducted, the grid electrode of the MOS tube Q3 is connected to the BATT _ BACKUP position of the plug-in J1 through a resistor R7 and is further conducted, the MOS tube Q1 and the MOS tube Q2 are conducted at the moment, the voltage of the vehicle body storage battery 40 is transmitted to a power converter 60 at the rear stage of the circuit for processing, and then the vehicle body storage battery 40 is used for supplying power to the automatic driving controller, wherein because the MOS tube Q6 is not conducted, the voltage of the vehicle body storage battery 40 cannot reversely pass through the MOS tube Q4 and the MOS tube Q5, and further does not affect the external battery 50; when the vehicle body storage battery 40 and the socket J2 are cut off, or power is suddenly turned off to a small voltage, the voltage value of the negative input end of the voltage comparator U1 is smaller than the voltage value of the positive input end of the voltage comparator U1, at the moment, the output end of the voltage comparator U1 outputs a high level, the MOS transistor Q1, the MOS transistor Q2 and the MOS transistor Q3 are not conducted, the MOS transistor Q4, the MOS transistor Q5 and the MOS transistor Q6 are all conducted, the external battery 50 transmits the voltage to the power converter 60 at the rear stage of the circuit through the MOS transistor Q4 and the MOS transistor Q5 for processing, and then the external battery 50 supplies power to the automatic driving controller, wherein, because the MOS transistor Q3 is not conducted, the voltage of the external battery 50 cannot reversely pass through the MOS transistor Q1 and the MOS transistor Q2, and further does not affect the vehicle body storage battery 40. In addition, when the external battery 50 supplies power to the automatic driving controller, if the external battery 50 is gradually consumed to cause the power supply to slowly drop, the system has enough time to store data at the moment, and the data is not stored and is not lost.
In the specific implementation process shown in fig. 3, the power supply circuit of the automatic driving controller further includes a fourth switch unit, and the fourth switch unit is respectively connected to the external battery 50, the output terminal, and the second switch unit 30. The third switching unit comprises an MOS transistor Q7, a gate of the MOS transistor Q7 is connected to the output terminal and the external battery 50, a drain of the MOS transistor Q7 is connected to the external battery 50 and the first switching unit 20, and a source of the MOS transistor Q7 is grounded.
Specifically, when the automatic driving controller is powered by the vehicle body storage battery 40, the MOS transistor Q7 is not turned on, the MOS transistor Q1, the MOS transistor Q2, and the MOS transistor Q3 are all turned on, and the voltage of the external battery 50 is transmitted to the power converter 60 at the rear stage of the circuit through the MOS transistor Q1 and the MOS transistor Q2 for processing, so that the vehicle body storage battery 40 is further used for powering the automatic driving controller; when the automatic driving controller is powered by the external battery 50, the MOS tube Q7 is switched on, the grid of the MOS tube Q3 is changed into a low level due to the switching on of the MOS tube Q7, at the moment, the MOS tube Q1 and the MOS tube Q2 are switched off, meanwhile, the MOS tube Q4, the MOS tube Q5 and the MOS tube Q6 are all switched on, the external battery 50 transmits voltage to a power converter 60 at the rear stage of the circuit for processing through the MOS tube Q4 and the MOS tube Q5, and then the external battery 50 is enabled to supply power to the automatic driving controller.
In the embodiment shown in fig. 4, the positive input terminal of the voltage comparator U1 samples the voltage of the external battery 50, and the negative input terminal of the voltage comparator U1 samples the voltage of the body storage battery 40 as a reference voltage. When the automatic driving controller is powered by the vehicle body storage battery 40, the voltage value of the negative input end of the voltage comparator U1 is greater than the voltage value of the positive input end of the voltage comparator U1, at the moment, the output end of the voltage comparator U1 outputs a low level, the MOS transistor Q4, the MOS transistor Q5 and the MOS transistor Q6 are not conducted, the grid of the MOS transistor Q3 is connected to the BATT _ BACKUP of the plug-in J1 through the resistor R7 and is further conducted, at the moment, the MOS transistor Q1 and the MOS transistor Q2 are conducted, the voltage of the vehicle body storage battery 40 is transmitted to the power converter 60 at the rear stage of the circuit for processing, and then the vehicle body storage battery 40 is used for supplying power to the automatic driving controller, wherein, because the grid of the MOS transistor Q6 is a low level, the MOS transistor Q6 is not conducted, the voltage of the vehicle body storage battery 40 cannot reversely pass through the MOS transistor Q4 and the MOS transistor Q5, and further does not affect the external battery 50; when the vehicle body storage battery 40 and the socket J2 are cut off, or power is suddenly turned off to a small voltage, the voltage value of the negative input end of the voltage comparator U1 is smaller than the voltage value of the positive input end of the voltage comparator U1, at the moment, the output end of the voltage comparator U1 outputs a high level, the MOS transistor Q1, the MOS transistor Q2 and the MOS transistor Q3 are not conducted, the MOS transistor Q4, the MOS transistor Q5 and the MOS transistor Q6 are all conducted, the external battery 50 transmits the voltage to the power converter 60 at the rear stage of the circuit through the MOS transistor Q4 and the MOS transistor Q5 for processing, and then the external battery 50 supplies power to the automatic driving controller, wherein, because the MOS transistor Q3 is not conducted, the voltage of the external battery 50 cannot reversely pass through the MOS transistor Q1 and the MOS transistor Q2, and further does not affect the vehicle body storage battery 40. In addition, when the external battery 50 supplies power to the automatic driving controller, if the external battery 50 is gradually consumed and the power supply is slowly reduced, the system has enough time for data storage at this time, and the data is not stored and is not lost.
In the specific implementation process shown in fig. 4, the power supply circuit of the automatic driving controller further includes a fourth switch unit, and the fourth switch unit is respectively connected to the external battery 50, the output terminal, and the second switch unit 30. The fourth switching unit comprises an MOS transistor Q8; the gate of the MOS transistor Q8 is connected to the output terminal and the external battery 50, the drain is connected to the external battery 50 and the first switch unit 20, and the source is grounded.
Specifically, when the automatic driving controller is powered by the vehicle body storage battery 40, the MOS transistor Q8 is turned on, the MOS transistor Q4 and the MOS transistor Q5 are not turned on, the gate of the MOS transistor Q3 is at a high level, and the MOS transistor Q3 is turned on, at this time, the MOS transistor Q1 and the MOS transistor Q2 are turned on, and the voltage of the external battery 50 is transmitted to the power converter 60 at the rear stage of the circuit through the MOS transistor Q1 and the MOS transistor Q2 to be processed, so that the vehicle body storage battery 40 supplies power to the automatic driving controller; when the automatic driving controller is supplied power by external battery 50, MOS pipe Q3, MOS pipe Q8 all does not switch on, MOS pipe Q1 this moment, MOS pipe Q2 cuts off, MOS pipe Q4 simultaneously, MOS pipe Q5 and MOS pipe Q6 all switch on, external battery 50 passes through MOS pipe Q4, MOS pipe Q5 passes to the power converter 60 processing of circuit back-stage with voltage, and then realize that external battery 50 normally supplies power to the automatic driving controller, thereby the effect of backup protection has been played.
It should be noted that the MOS transistors Q1, Q2, Q4, and Q5 mentioned in the embodiment of the present application are preferably P-channel MOS transistors, and the MOS transistors Q3, Q6, Q7, and Q8 are preferably N-channel MOS transistors, so as to meet the power supply requirement of a current of several tens of amperes required by the circuit.
The MOS transistor Q1, the MOS transistor Q2, the MOS transistor Q3, the MOS transistor Q4, the MOS transistor Q5, the MOS transistor Q6, the MOS transistor Q7, and the MOS transistor Q8 may be selected according to practical applications, and are not specifically limited in this embodiment.
In addition, a body diode is connected between the drain electrode and the source electrode of the MOS transistor Q1, the MOS transistor Q2, the MOS transistor Q3, the MOS transistor Q4, the MOS transistor Q5, the MOS transistor Q6, the MOS transistor Q7 and the MOS transistor Q8 in the embodiment of the application, so that the protection effect on the MOS transistor is realized.
In some embodiments, the power supply circuit of the automatic driving controller further includes a first voltage dividing circuit and a second voltage dividing circuit, the first voltage dividing circuit is connected to the first input terminal and the vehicle body storage battery 40, respectively, and the second voltage dividing circuit is connected to the second input terminal and the external battery 50, respectively. Specifically, the comparison unit 10 is a voltage comparator, and the positive input end and the negative input end of the voltage comparator can be respectively connected to the external battery 50 and the vehicle body battery 40, and the voltage of the voltage comparator, which is accurately collected to the vehicle body battery 40 and the external battery 50, is obtained through a voltage division circuit, so that the voltage value of the voltage drop of the vehicle body battery 40 is accurately set to switch the power supply of the external battery 50 to the system, and the normal work of the protection system is realized.
In the embodiment shown in fig. 3, the vehicle body storage battery 40 is connected to the negative input terminal of the voltage comparator through a first voltage dividing circuit, and the external battery 50 is connected to the positive input terminal of the voltage comparator through a second voltage dividing circuit, where the first voltage dividing circuit includes a resistor R3 and a resistor R11, and the second voltage dividing circuit includes a resistor R2 and a resistor R5. The negative input end of the voltage comparator is connected with the vehicle body storage battery 40 sequentially through the resistor R10 and the resistor R3, is grounded sequentially through the resistor R10 and the resistor R11, and is grounded sequentially through the resistor R10 and the capacitor C3; the positive input end of the voltage comparator is connected with the external battery 50 through the resistor R4 and the resistor R2 in sequence, and is grounded through the resistor R4 and the resistor R5 in sequence. The capacitor C3 may filter the voltage of the body battery 40.
In the embodiment shown in fig. 4, the vehicle body storage battery 40 is connected to the positive input terminal of the voltage comparator through a first voltage dividing circuit, and the external battery 50 is connected to the negative input terminal of the voltage comparator through a second voltage dividing circuit, where the first voltage dividing circuit includes a resistor R2 and a resistor R5, and the second voltage dividing circuit includes a resistor R3 and a resistor R11. The negative input end of the voltage comparator is connected with the external battery 50 through the resistor R10 and the resistor R3 in sequence and is grounded through the resistor R10 and the resistor R11 in sequence; the positive input end of the voltage comparator is connected with the vehicle body storage battery 40 sequentially through the resistor R4 and the resistor R2, grounded sequentially through the resistor R4 and the resistor R5, and grounded sequentially through the resistor R4 and the capacitor C3.
It should be noted that the capacitor C3 mentioned in the embodiment shown in fig. 3 and 4 may filter the voltage of the body battery 40.
According to the power supply circuit of the automatic driving controller provided by the embodiment of the invention, the external battery 50 is arranged in the circuit, the comparison unit 10 is adopted to sample the vehicle body storage battery 40 and the external battery 50, and the first switch unit 20 and the second switch unit 30 are used for controlling the power supply of the vehicle body storage battery 40 and the external battery 50 to the automatic driving controller, so that the technical problem that the power supply cannot be supplied to the automatic driving controller after the vehicle body storage battery 40 is disconnected with the automatic driving controller is solved, and the data safety of a user is ensured. In addition, the external battery 50 can be installed in the cabin, thereby preventing the external battery 50 from being damaged due to external collision of the automobile.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A power supply circuit for an automatic drive controller, comprising:
the comparison unit comprises a voltage comparator, a first input end of the voltage comparator is connected with the vehicle body storage battery, and a second input end and an output end of the voltage comparator are connected with an external battery;
the first switch unit is respectively connected with the vehicle body storage battery, the output end and a power converter of the automatic driving controller; wherein the first switching unit includes: MOS transistor Q1, MOS transistor Q2 and MOS transistor Q3; the grid electrode of the MOS tube Q1 is respectively connected with the grid electrode of the MOS tube Q2 and the drain electrode of the MOS tube Q3, the drain electrode of the MOS tube Q1 is connected with the vehicle body storage battery, the source electrode of the MOS tube Q1 is respectively connected with the drain electrode of the MOS tube Q2 and the drain electrode of the MOS tube Q3, the source electrode of the MOS tube Q2 is connected with the power converter, the grid electrode of the MOS tube Q3 is respectively connected with the output end and the external battery, and the source electrode of the MOS tube Q3 is grounded;
a second switching unit connected to the external battery, the output terminal, and the power converter, respectively; wherein the second switching unit includes: MOS transistor Q4, MOS transistor Q5 and MOS transistor Q6; the grid of the MOS tube Q4 is respectively connected with the grid of the MOS tube Q5 and the drain of the MOS tube Q6, the drain of the MOS tube Q4 is connected with the external battery, the source of the MOS tube Q4 is respectively connected with the drain of the MOS tube Q5 and the drain of the MOS tube Q6, the source of the MOS tube Q5 is connected with the power converter, the grid of the MOS tube Q6 is respectively connected with the output end and the external battery, and the source of the MOS tube Q6 is grounded;
the circuit further comprises a third switching unit which is connected with the external battery, the output end and the first switching unit respectively; or
The circuit further comprises a fourth switching unit, which is connected with the external battery, the output terminal and the second switching unit respectively;
when the vehicle body storage battery supplies power to the automatic driving controller, the voltage comparator and the external battery control the third switching unit to be not conducted or control the fourth switching unit to be conducted, the first switching unit is conducted, and the second switching unit is disconnected; when the vehicle body storage battery is disconnected with the automatic driving controller, the voltage comparator and the external battery control the third switch unit to be conducted or control the fourth switch unit to be not conducted, the first switch unit is disconnected, the second switch unit is conducted, and the external battery supplies power to the automatic driving controller.
2. The power supply circuit of an autopilot controller according to claim 1 wherein the body battery is connected to the external battery to effect charging of the external battery.
3. The power supply circuit of an automatic driving controller according to claim 1, wherein the third switching unit includes a MOS transistor Q7;
the grid electrode of the MOS tube Q7 is respectively connected with the output end and the external battery, the drain electrode is respectively connected with the external battery and the first switch unit, and the source electrode is grounded.
4. The power supply circuit of an automatic driving controller according to claim 1, wherein the fourth switching unit comprises a MOS transistor Q8;
the grid electrode of the MOS tube Q8 is respectively connected with the output end and the external battery, the drain electrode is respectively connected with the external battery and the first switch unit, and the source electrode is grounded.
5. The power supply circuit of an automatic driving controller according to claim 1, characterized in that the circuit further comprises a first voltage dividing circuit, and the first voltage dividing circuit is respectively connected with the first input terminal and the vehicle body storage battery.
6. The power supply circuit of an automatic driving controller according to claim 1, characterized in that the circuit further comprises a second voltage dividing circuit, and the second voltage dividing circuit is respectively connected with the second input end and the external battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211117493.8A CN115195642B (en) | 2022-09-14 | 2022-09-14 | Power supply circuit of automatic driving controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211117493.8A CN115195642B (en) | 2022-09-14 | 2022-09-14 | Power supply circuit of automatic driving controller |
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| CN115195642B true CN115195642B (en) | 2023-01-06 |
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| JP2002091583A (en) * | 2000-09-14 | 2002-03-29 | Seiko Epson Corp | Constant-voltage output device |
| CN1667910A (en) * | 2004-03-08 | 2005-09-14 | 日本电气株式会社 | Battery switching circuit for a portable communication device, battery switching method therefor, and battery switching program therefor |
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|---|---|
| CN115195642A (en) | 2022-10-18 |
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