CN112776743B - Vehicle-mounted control system using Fabry-Perot capacitor battery - Google Patents
Vehicle-mounted control system using Fabry-Perot capacitor battery Download PDFInfo
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- CN112776743B CN112776743B CN202110253538.3A CN202110253538A CN112776743B CN 112776743 B CN112776743 B CN 112776743B CN 202110253538 A CN202110253538 A CN 202110253538A CN 112776743 B CN112776743 B CN 112776743B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000011324 bead Substances 0.000 claims description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 7
- 238000007599 discharging Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008092 positive effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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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
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a vehicle-mounted control system using a Fabry-Perot battery, and provides a device for realizing uninterrupted switching of charge and discharge of a Fabry-Perot backup battery. The Faraday capacitor is charged when the external power supply is connected, the connection condition of the external power supply is automatically detected, and the Faraday capacitor is switched to supply power when the external power supply is disconnected. The method has the advantages and positive effects that: the Faraday capacitor of the system can be charged to any potential in the rated voltage range and can be completely discharged, and the common battery is limited by chemical reaction and works in a narrower voltage range, so that permanent damage can be caused if the common battery is excessively discharged; meanwhile, the device is different from the prior other switching devices in that the MCU is used for detecting an external power supply and switching the charging and discharging states to generate time delay and state errors caused by running of an MCU internal program, and the switching is detected by adopting pure hardware, so that the real-time performance and the reliability are improved.
Description
Technical Field
The invention relates to the electrical field of vehicle-mounted equipment, in particular to a vehicle-mounted control system using a Fabry-Perot capacitor battery.
Background
The vehicle-mounted control system is an important part of the vehicle networking system, mainly completes collection, interaction, display and uploading of data inside and outside the vehicle, and can realize functions of remote control, air upgrading and the like.
At present, in the traditional vehicle-mounted control system equipment, a standby battery is not necessarily provided, so that after the main power supply vehicle-mounted battery is powered off, working current cannot be provided for the vehicle-mounted control system, and system data are lost instantaneously; or even if a spare battery is available, the spare battery has limited capacity, and if the spare battery is used for a long time, the spare battery can cause overdischarge of the spare battery to influence the service life of the spare battery: some battery charging and discharging management chips are needed to manage the standby battery, but the cost is high, and meanwhile, different chips are needed to be selected according to different batteries due to different battery characteristics, so that the product compatibility design is not facilitated.
Disclosure of Invention
In order to solve the problems, the invention provides the vehicle-mounted control system which automatically realizes charge-discharge switching through the pure electric circuit design and has good charge-discharge effect and uses the Faraday capacitor battery.
In order to achieve the above purpose, the vehicle-mounted control system using the Faraday capacitor battery comprises an input voltage, a voltage conversion circuit and a vehicle-mounted control system, wherein the input voltage is converted to a rated voltage through the voltage conversion circuit to supply power to the vehicle-mounted control system, a Faraday capacitor standby battery is connected between the voltage conversion circuit and the vehicle-mounted control system through a charge-discharge switching circuit, and the input voltage is directly connected to the charge-discharge switching circuit.
The further scheme is that the Faraday capacitor standby battery consists of two Faraday capacitors FC1 and FC2 which are connected in series, and the negative electrode of the Faraday capacitor standby battery is grounded;
The charge-discharge switching circuit comprises an input voltage VIN and a working voltage Vsupply obtained by the voltage conversion circuit:
The input voltage VIN is grounded after passing through a resistor R1 and a resistor R2 which are connected in series, a B pole of a triode Q3 is connected between the resistor R1 and the resistor R2 through a resistor R5, a C pole of the triode Q3 is grounded through a resistor R8, a working voltage Vsupply is sequentially connected with an E pole of the triode Q3 through a high-power ferrite bead FB1 and a resistor R7, the working voltage Vsupply is also sequentially connected with a Faraday capacitor FC1 and FC2 through the high-power ferrite bead FB1, an S pole and a D pole of the MOS tube Q1 to form a passage, and the E pole of the triode Q3 is connected with the G pole of the MOS tube Q1;
The input voltage VIN is grounded through resistors R3 and R4 connected in series, the B pole of a triode Q4 is connected between the resistors R3 and R4 through a resistor R6, the E pole of the triode Q4 is grounded, the C pole of the triode Q4 is connected with the G pole of a MOS tube Q2, the working voltage Vsupply sequentially passes through the D pole and the S pole of the MOS tube Q2, the resistor R10 of the S pole and the Faraday capacitors FC1 and FC2 connected in series to form a passage, and meanwhile, a resistor R9 is further arranged between the G pole and the S pole of the MOS tube Q2.
The invention provides a vehicle-mounted control system using a Fabry-Perot battery, and provides a device for realizing uninterrupted switching of charge and discharge of a Fabry-Perot backup battery. The Faraday capacitor is charged when the external power supply is connected, the connection condition of the external power supply is automatically detected, and the Faraday capacitor is switched to supply power when the external power supply is disconnected. The method has the advantages and positive effects that: the Faraday capacitor of the system can be charged to any potential in the rated voltage range and can be completely discharged, and the common battery is limited by chemical reaction and works in a narrower voltage range, so that permanent damage can be caused if the common battery is excessively discharged; meanwhile, the device is different from the prior other switching devices in that the MCU is used for detecting an external power supply and switching the charging and discharging states to generate time delay and state errors caused by running of an MCU internal program, and the switching is detected by adopting pure hardware, so that the real-time performance and the reliability are improved.
Drawings
Fig. 1 is a circuit configuration diagram of embodiment 1.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.
Example 1.
The vehicle-mounted control system using the Faraday capacitor battery described in the embodiment comprises an input voltage, a voltage conversion circuit and a vehicle-mounted control system, wherein the input voltage is converted to a rated voltage through the voltage conversion circuit to supply power to the vehicle-mounted control system, a Faraday capacitor standby battery is further connected between the voltage conversion circuit and the vehicle-mounted control system through a charge-discharge switching circuit, and the input voltage is also directly connected to the charge-discharge switching circuit.
The Faraday capacitor standby battery consists of two Faraday capacitors FC1 and FC2 which are connected in series, and the negative electrode of the Faraday capacitor standby battery is grounded;
The charge-discharge switching circuit comprises an input voltage VIN and a working voltage Vsupply obtained by the voltage conversion circuit:
The input voltage VIN is grounded after passing through a resistor R1 and a resistor R2 which are connected in series, a B pole of a triode Q3 is connected between the resistor R1 and the resistor R2 through a resistor R5, a C pole of the triode Q3 is grounded through a resistor R8, a working voltage Vsupply is sequentially connected with an E pole of the triode Q3 through a high-power ferrite bead FB1 and a resistor R7, the working voltage Vsupply is also sequentially connected with a Faraday capacitor FC1 and FC2 through the high-power ferrite bead FB1, an S pole and a D pole of the MOS tube Q1 to form a passage, and the E pole of the triode Q3 is connected with the G pole of the MOS tube Q1;
The input voltage VIN is grounded through resistors R3 and R4 connected in series, the B pole of a triode Q4 is connected between the resistors R3 and R4 through a resistor R6, the E pole of the triode Q4 is grounded, the C pole of the triode Q4 is connected with the G pole of a MOS tube Q2, the working voltage Vsupply sequentially passes through the D pole and the S pole of the MOS tube Q2, the resistor R10 of the S pole and the Faraday capacitors FC1 and FC2 connected in series to form a passage, and meanwhile, a resistor R9 is further arranged between the G pole and the S pole of the MOS tube Q2.
When the vehicle-mounted control system works, when the input voltage is connected with the vehicle-mounted main power supply, the input voltage passes through the voltage conversion circuit to convert the direct-current high voltage into the working voltage acceptable by the vehicle-mounted control system. The operating voltage is supplied to the vehicle-mounted control system device on the one hand, and the faraday capacitor backup battery is charged by means of the charge-discharge switching circuit on the other hand. When the input voltage is disconnected from the vehicle-mounted main power supply, the voltage conversion circuit does not output, and the working voltage is provided by the Faraday capacitor standby battery. The specific Faraday capacitor standby battery is in a charging state or a discharging state, and the charging and discharging switching circuit obtains the current power supply state from the input voltage, so that the selection circuit adopts a charging or discharging branch. When the charging branch is adopted, current flows from the working voltage to the Faraday capacitor rechargeable battery through the charging and discharging switching circuit; when the discharging branch is adopted, current flows from the Faraday capacitor rechargeable battery to the working voltage through the charging and discharging switching circuit to supply power to the vehicle-mounted control system.
For a specific circuit condition, the Faraday capacitor FC1 and the Faraday capacitor FC2 are formed by connecting two capacitors in series and are used as a vehicle-mounted control system and a battery. VIN is the external vehicle body input voltage, and the voltage is converted into the working voltage Vsupply which can be used by the vehicle-mounted control system through the voltage conversion circuit. As soon as the Vsupply voltage is greater than the sum of the faraday capacitor voltage and the forward voltage drop of the body diode inside the MOS transistor Q2, the faraday capacitor starts to be charged through the body diode. However, if charged by the diode path only, the faraday capacitor voltage will always be lower than Vsupply, which is approximately the forward voltage drop of the body diode. To compensate for this, an input voltage detection switching circuit composed of R3, R4, R6, and Q4, and an input voltage detection switching circuit composed of R1, R2, R5, and Q3 are introduced.
When the external input voltage VIN is connected with the vehicle-mounted power supply, namely, the vehicle-mounted power supply enters a charging state, the voltage detected by the B pole of the triode Q4 through the voltage dividing resistors R3 and R4 is larger than the emitter voltage, the C pole and the E pole of the triode Q4 are conducted, the voltage difference between the G pole and the S pole of the MOS tube Q2 is larger than the threshold voltage, and the D pole and the S pole of the MOS tube Q2 are directly conducted. Meanwhile, the voltage detected by the B pole of the triode Q3 through the voltage dividing resistors R1 and R2 is larger than the voltage of the emitting junction of the triode Q3, and the E pole and the C pole of the triode Q3 are cut off, so that no pressure difference exists between the G pole and the S pole of the MOS tube Q1, the MOS tube Q1 is cut off, and the discharge circuit does not work.
When external input voltage VIN is disconnected from a vehicle-mounted power supply, namely, the vehicle-mounted power supply enters a discharge state, the voltage detected by the B pole of the triode Q4 through the voltage dividing resistors R3 and R4 is smaller than the emitter voltage, the C pole and the E pole of the triode Q4 are cut off, so that no pressure difference exists between the G pole and the S pole of the MOS tube Q2, the D pole and the S pole of the MOS tube Q2 are cut off, and an open circuit state is formed between the D pole and the S pole. Meanwhile, the voltage of the Vsupply is not higher than the working voltage Vsupply, and the body diode of the MOS transistor Q2 is turned off reversely. When the external input voltage VIN is disconnected from the vehicle-mounted power supply, the instant working voltage Vsupply of power failure is not output, and at the moment, the voltage VBB of the Faraday capacitor is larger than the working voltage Vsupply. Meanwhile, the voltage detected by the B pole of the triode Q3 through the voltage dividing resistors R1 and R2 is smaller than the voltage of the emitting junction of the triode Q3, and the C pole and the E pole of the triode Q3 are conducted, so that the voltage difference between the G pole and the S pole of the MOS tube Q1 is larger than the threshold voltage, and the D pole and the S pole of the MOS tube Q1 are conducted. Therefore, in the whole discharging process, the VBB voltage is basically the same as the Vsupply voltage, and the voltage difference generated by the body diode of the MOS transistor Q1 is avoided, so that the electric energy of the Fabry-Perot capacitor is fully utilized. Meanwhile, high-power ferrite bead FB1 in front of the working voltage Vsupply is utilized to inhibit high-frequency interference, so that the working voltage Vsupply is better stable.
Meanwhile, although the faraday capacitor has the advantage of large charge-discharge current, in view of limited output capability of the voltage conversion circuit between the input voltage VIN and the operating voltage Vsupply, in order to prevent overload of the voltage conversion circuit, a current limiting resistor R10 is reserved on the charging path to limit the maximum charging current in the charging circuit.
The present invention is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present invention.
Claims (1)
1. The vehicle-mounted control system using the Faraday capacitor battery comprises an input voltage, a voltage conversion circuit and a vehicle-mounted control system, wherein the input voltage is converted to a rated voltage through the voltage conversion circuit to supply power to the vehicle-mounted control system;
the Faraday capacitor standby battery consists of two Faraday capacitors FC1 and FC2 which are connected in series, and the negative electrode of the Faraday capacitor standby battery is grounded;
The charge-discharge switching circuit comprises an input voltage VIN and a working voltage Vsupply obtained by the voltage conversion circuit:
The input voltage VIN is grounded after passing through a resistor R1 and a resistor R2 which are connected in series, a B pole of a triode Q3 is connected between the resistor R1 and the resistor R2 through a resistor R5, a C pole of the triode Q3 is grounded through a resistor R8, a working voltage Vsupply is sequentially connected with an E pole of the triode Q3 through a high-power ferrite bead FB1 and a resistor R7, the working voltage Vsupply is also sequentially connected with a Faraday capacitor FC1 and FC2 through the high-power ferrite bead FB1, an S pole and a D pole of the MOS tube Q1 to form a passage, and the E pole of the triode Q3 is connected with the G pole of the MOS tube Q1;
The input voltage VIN is grounded through resistors R3 and R4 connected in series, the B pole of a triode Q4 is connected between the resistors R3 and R4 through a resistor R6, the E pole of the triode Q4 is grounded, the C pole of the triode Q4 is connected with the G pole of a MOS tube Q2, the working voltage Vsupply sequentially passes through the D pole and the S pole of the MOS tube Q2, the resistor R10 of the S pole and the Faraday capacitors FC1 and FC2 connected in series to form a passage, and meanwhile, a resistor R9 is further arranged between the G pole and the S pole of the MOS tube Q2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110253538.3A CN112776743B (en) | 2021-03-08 | 2021-03-08 | Vehicle-mounted control system using Fabry-Perot capacitor battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110253538.3A CN112776743B (en) | 2021-03-08 | 2021-03-08 | Vehicle-mounted control system using Fabry-Perot capacitor battery |
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| CN112776743B true CN112776743B (en) | 2024-05-17 |
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