CN116513082A - Automatic switching device and method for power supply of OBD intelligent equipment - Google Patents
Automatic switching device and method for power supply of OBD intelligent equipment Download PDFInfo
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- CN116513082A CN116513082A CN202310069063.1A CN202310069063A CN116513082A CN 116513082 A CN116513082 A CN 116513082A CN 202310069063 A CN202310069063 A CN 202310069063A CN 116513082 A CN116513082 A CN 116513082A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 66
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 16
- 229910052744 lithium Inorganic materials 0.000 claims description 16
- 101100406797 Arabidopsis thaliana PAD4 gene Proteins 0.000 claims description 15
- 101150094373 Padi4 gene Proteins 0.000 claims description 15
- 102100035731 Protein-arginine deiminase type-4 Human genes 0.000 claims description 15
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
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- 238000004891 communication Methods 0.000 description 1
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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
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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
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to an automatic switching device and method of an OBD intelligent device power supply, wherein the switching device comprises a battery and a power management module, the power management module is respectively connected between an OBD interface and OBD hardware equipment, and the battery is connected with the OBD hardware equipment; when the vehicle is in a starting state, the power management module works, the automobile storage battery can supply power to the OBD hardware equipment through the OBD interface and the power management module, the automobile storage battery can also charge the battery through the OBD interface, when the vehicle is in a flameout state, the power management module stops working, the power management module cuts off the power supply of the automobile storage battery to the OBD hardware equipment, and then the battery charged with electricity is utilized to supply power to the OBD hardware equipment, so that the problem that the OBD hardware equipment cannot take power from the OBD interface of the vehicle after the vehicle is flameout is solved, and the battery charged with electricity is utilized to supply power to the OBD hardware equipment, so that the problem of power shortage of the automobile storage battery is avoided.
Description
Technical Field
The invention relates to the technical field of vehicle monitoring, in particular to an automatic switching device and method for power supply of OBD intelligent equipment.
Background
With the popularization of automobiles and the development of information technology, OBD (On-Board Diagnostic) technology is commonly applied to automobiles, and On the basis, various OBD vehicle-mounted devices capable of accessing to an OBD Diagnostic interface of an automobile are also produced, and the OBD vehicle-mounted devices can acquire relevant information of the automobile or control the automobile.
At present, the OBD hardware equipment with the vehicle track and the emission related monitoring function is powered from the vehicle OBD interface connected with the vehicle storage battery in the use process, but because the vehicle track and the emission related monitoring function are required to be used when the vehicle is started or extinguished, the current OBD hardware equipment continues to use the OBD interface to power after the vehicle is extinguished, and the problem that the power consumption of the vehicle storage battery is often caused.
Disclosure of Invention
The invention aims to provide an automatic switching device and method for power supply of OBD intelligent equipment, which are used for solving the problems in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides an automatic switching device of an OBD intelligent device power supply, which comprises a battery and a power management module, wherein the power management module comprises a PAD4 interface and a PAD7 interface, the PAD4 interface is a power input interface of the power management module, the PAD7 interface is a power output interface of the power management module, the PAD4 interface is connected with an OBD interface, the PAD7 interface is connected with an OBD hardware device, and the battery is connected between the PAD7 interface and the OBD hardware device;
when the vehicle is in a starting state, the output voltage of the OBD interface is between 12.7V and 14.4V, the power management module works normally, the automobile storage battery sequentially supplies power to the OBD hardware equipment through the OBD interface and the power management module, and the automobile storage battery charges the battery;
when the vehicle is in a flameout state, the output voltage of the OBD interface is between 12V and 12.5V, the power management module stops working to cut off the power supply of the automobile storage battery to the OBD hardware equipment, and the battery supplies power to the OBD hardware equipment.
Further, the power management module comprises a power chip, a resistor R10, a resistor R23 and a resistor R28, wherein the resistor R28 and the resistor R23 are connected in series between an EN end and a VIN end of the power chip, the resistor R10 is connected between the EN end and a GND end of the power chip, and the VIN end of the power chip is connected with the PAD4 interface;
the power management module further comprises a capacitor C8, and the capacitor C8 is connected between a BOOT end and a PH end of the power chip;
the power management module further comprises a diode D2, an inductor L3, a resistor R12, a resistor R13, a resistor R14, a capacitor C22 and a capacitor C9, wherein the negative electrode of the diode D2 is connected with the PH end of the power chip, the positive electrode of the diode D2 is connected with the GND end, one end of the inductor L3 is connected with the negative electrode of the diode D2, the other end of the inductor L3 is connected with the PAD7 interface, the resistor R12 and the resistor R13 are connected in series between the PAD7 interface and the VSENES end of the power chip, the resistor R14 is connected between the VSENES end and the GND end of the power chip, the capacitor C9 is connected between the PAD7 interface and the GND end, the capacitor C22 is connected between the PAD7 interface and the GND end, and the PAD7 interface is connected with the OBD hardware equipment;
the power management module further comprises a capacitor C17, a capacitor C18, a capacitor C19 and a resistor R9, wherein the capacitor C17 and the resistor R9 are sequentially connected in series between the COMP end and the GND end of the power chip; the capacitor C18 is connected between the COMP end and the GND end of the power chip, and the capacitor C19 is connected between the SS end and the GND end of the power chip.
Further, the resistance of the resistor R10 is 100K, the resistance of the resistor R23 is 510K, and the resistance of the resistor R28 is 390K.
Further, the power management module further includes a capacitor C20 and a capacitor C21, where the capacitor C20 and the capacitor C21 are both connected between the VIN end and the GND end of the power chip.
Further, the battery comprises a charging module and a lithium battery, wherein the charging module is connected between the PAD7 interface and the lithium battery, and the lithium battery is connected with the OBD hardware device.
Further, the charging module comprises a battery management chip, an LED, a resistor R25, a resistor R26, a capacitor C29 and a capacitor C30, wherein the CHRG end and the STDBY end of the battery management chip are connected with the cathode of the LED, the resistor R26 is connected between the anode of the LED and the PAD7 interface, the VCC end and the CE end of the battery management chip are connected with the PAD7 interface, the capacitor C29 is connected between the VCC end and the GND end of the battery management chip, the resistor R25 is connected between the PROG end and the GND end of the battery management chip, the capacitor C30 is connected between the TEMP end and the BAT end of the battery management chip, the TEMP end and the GND end of the battery management chip are connected, and the BAT end and the lithium battery of the battery management chip are connected.
The invention also provides an automatic switching method of the power supply of the OBD intelligent equipment, which is based on the switching device and comprises the following steps:
when the vehicle is in a starting state, the output voltage of the OBD interface is between 12.7V and 14.4V, an automobile storage battery supplies power for the OBD hardware equipment, and the automobile storage battery charges the battery;
when the vehicle is in a flameout state, the output voltage of the OBD interface is between 12V and 12.5V, the power management module cuts off the power supply of the automobile storage battery to the OBD hardware equipment, and the battery supplies power to the OBD hardware equipment.
Further, the battery provides 3.7V power to the OBD hardware device.
The above-mentioned one or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
according to the automatic switching device and the method for the power supply of the OBD intelligent equipment, the resistance parameter of the enable pin EN end of the power chip U4 is regulated, so that the power chip U4 normally works when the input voltage is higher than 12.7V and stops working when the input voltage is lower than 12.7V, when a vehicle is in a starting state, the power chip U4 normally works, so that an automobile storage battery can sequentially supply power to the OBD hardware equipment through an OBD interface and a power management module, the automobile storage battery can charge a battery through the OBD interface, when the vehicle is in a flameout state, the power chip U4 stops working, the power management module cuts off the power supply of the automobile storage battery to the OBD hardware equipment, and then the charged battery is used for supplying power to the OBD hardware equipment, so that the OBD hardware equipment cannot take power from the OBD interface of the vehicle after the vehicle is flameout, and the charged battery is used for supplying power to the OBD hardware equipment, and the problem of power to the automobile storage battery is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a switching device according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a power management module according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a first portion of a power management module according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a second portion of a power management module according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a battery according to an embodiment of the present invention;
fig. 6 is a flowchart of a handover method according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
At present, the OBD hardware equipment with the vehicle track and the emission related monitoring function is powered from the vehicle OBD interface connected with the vehicle storage battery in the use process, but because the vehicle track and the emission related monitoring function are required to be used when the vehicle is started or extinguished, the current OBD hardware equipment continues to use the OBD interface to power after the vehicle is extinguished, and the problem that the power consumption of the vehicle storage battery is often caused.
Based on this, how to provide a technology that can avoid OBD hardware equipment to continue to use OBD interface to get electricity and lead to the storage battery to lack the electricity when the car is flameout has become the urgent technical problem that needs to solve.
The technical scheme of the invention is further elaborated by the following with reference to the drawings and specific embodiments.
Referring to fig. 1-5, an embodiment of the invention provides an automatic switching device for power supply of an OBD intelligent device, which comprises a battery and a power management module, wherein the power management module comprises a PAD4 interface and a PAD7 interface, the PAD4 interface is a power input interface of the power management module, the PAD7 interface is a power output interface of the power management module, the PAD4 interface is connected with the OBD interface, the PAD7 interface is connected with an OBD hardware device, and the battery is connected between the PAD7 interface and the OBD hardware device, wherein a core module of the power management module is a power chip U4;
in this embodiment, through monitoring the power supply characteristic of the OBD interface of the automobile, find that the OBD interface output voltage is between 12V and 12.5V when the engine is not started, after the engine is started, the OBD interface output voltage is between 12.7V and 14.4V, combine this power supply characteristic, we enable the resistance parameter of foot EN end through adjusting power chip U4, make power chip U4 normally work when input voltage is greater than 12.7V, stop work when being less than 12.7V, this just makes when the vehicle is in the start-up state, power chip U4 normally work, make the automobile storage battery can pass through OBD interface and power management module in proper order for OBD hardware equipment supplies power, the automobile storage battery also can be through OBD interface for battery charging simultaneously, and when the vehicle is in the state, power chip U4 stops working, and then make the power management module cut off the automobile storage battery to the power supply of OBD hardware equipment, then utilize the battery that charges to OBD hardware equipment, the battery is supplied with power to OBD hardware equipment, thereby realized, after the vehicle is in the state, the power supply hardware equipment is not taken from the OBD hardware equipment, the problem has been avoided to take out to the power supply hardware equipment.
Further, the power management module comprises a power chip U4, a resistor R10, a resistor R23, a resistor R28 and a PAD4 interface, wherein the resistor R28 and the resistor R23 are connected in series between an EN end and a VIN end of the power chip, the resistor R10 is connected between the EN end and a GND end of the power chip, the VIN end of the power chip is connected with the PAD4 interface, and the PAD4 interface is connected with the OBD interface;
specifically, the resistor R10, the resistor R23 and the resistor R28 in the circuit form a voltage dividing circuit of the enable pin EN of the power chip, the voltage dividing circuit can continuously work when the input power of the power chip U4 is stably input, and when the voltage of the input power of the power chip U4 is lower than a certain threshold value, the voltage of the enable pin of the power chip U4 is insufficient, and the power chip U4 stops working;
further, the power management module further includes a capacitor C8, where the capacitor C8 is connected between the BOOT end and the PH end of the power chip U4;
specifically, a capacitor C8 in the circuit is a starting circuit, and when the capacitor C8 is used for charging, the power chip U4 is started to work;
further, the power management module further includes a diode D2, an inductor L3, a resistor R12, a resistor R13, a resistor R14, a capacitor C22 and a capacitor C9, wherein a negative electrode of the diode D2 is connected with a PH end of the power chip U4, a positive electrode of the diode D2 is connected with a GND end, one end of the inductor L3 is connected with a negative electrode of the diode D2, the other end of the inductor L3 is connected with the PAD7 interface, the resistor R12 and the resistor R13 are connected in series between the PAD7 interface and a VSENES end of the power chip U4, the resistor R14 is connected between a VSENES end and a GND end of the power chip U4, the capacitor C9 is connected between the PAD7 interface and the GND end, the capacitor C22 is connected between the PAD7 interface and the GND end, and the PAD7 interface is connected with the OBD hardware device;
specifically, the diode D2 and the inductor L3 in the circuit form a BUCK step-down circuit of DC-DC, so that the power management module can output proper voltage at the PAD7 interface, and the voltage specifically output by the embodiment is 5V;
specifically, the PAD4 interface is a power input interface of the OBD interface, and the PAD7 interface is a 5V output pin for supplying power to modules such as a CAN bus, a communication module, an MCU and the like of the OBD hardware equipment;
specifically, a 5V output regulating circuit is formed by a resistor R12, a resistor R13 and a resistor R14 in the circuit, so that the voltage output by the power management module when the vehicle is started is ensured to be 5V;
specifically, the capacitors C22 and C9 are filter capacitors for filtering the circuit.
Further, the power management module further comprises a capacitor C17, a capacitor C18, a capacitor C19 and a resistor R9, wherein the capacitor C17 and the resistor R9 are sequentially connected in series between the COMP end and the GND end of the power chip U4; the capacitor C18 is connected between the COMP end and the GND end of the power chip U4, and the capacitor C19 is connected between the SS end and the GND end of the power chip U4;
specifically, C17, C18, capacitor C19 and resistor R9 in the circuit are current compensation circuits of the circuit.
Further, the resistance of the resistor R10 is 100K, the resistance of the resistor R23 is 510K, the resistance of the resistor R28 is 390K, and a voltage dividing circuit of the enable pin EN of the power chip U4 is formed, so that the power chip U4 works normally when the input voltage is greater than 12.7V and stops working when the input voltage is lower than 12.7V.
Further, the power management module further includes a capacitor C20 and a capacitor C21, where the capacitor C20 and the capacitor C21 are both connected between the VIN end and the GND end of the power chip U4.
In some embodiments, the battery comprises a charging module and a lithium battery, the charging module is connected between the PAD7 interface and the lithium battery, and the lithium battery is connected with the OBD hardware device.
Further, the charging module includes a battery management chip U6, an LED, a resistor R25, a resistor R26, a capacitor C29 and a capacitor C30, where the CHRG end and the STDBY end of the battery management chip U6 are connected with the negative electrode of the LED, the resistor R26 is connected between the positive electrode of the LED and the PAD7 interface, the VCC end and the CE end of the battery management chip U6 are connected with the PAD7 interface, the capacitor C29 is connected between the VCC end and the GND end of the battery management chip U6, the resistor R25 is connected between the PROG end and the GND end of the battery management chip U6, the capacitor C30 is connected between the TEMP end of the battery management chip U6 and the BAT end of the battery management chip U6, the TEMP end of the battery management chip U6 is connected with the GND end, and the BAT end of the battery management chip U6 is connected with the lithium battery.
Specifically, after the engine is started, 5V charging voltage output by a PAD7 interface of the power management module is input into a battery management chip U6, the charging voltage is processed by the battery management chip U6, an LED is lightened when a lithium battery is charged, after the engine is stopped, the charging input voltage is 0, the battery management chip U6 does not work, and at the moment, a charged lithium battery provides power for OBD hardware equipment;
specifically, C29 and C30 in the circuit are circuit filter capacitors, R26 in the circuit is a current limiting resistor of a charging LED, the charging voltage of a lithium battery is 4.2V, and the lithium battery is a charging power supply of the OBD hardware equipment.
Referring to fig. 6, the embodiment of the invention further provides an automatic switching method of the power supply of the OBD intelligent device, wherein the switching method is based on the switching device and comprises the following steps:
s11: when the vehicle is in a starting state, the output voltage of the OBD interface is between 12.7V and 14.4V, an automobile storage battery supplies power for the OBD hardware equipment, and the automobile storage battery charges the battery;
s12: when the vehicle is in a flameout state, the output voltage of the OBD interface is between 12V and 12.5V, the power management module cuts off the power supply of the automobile storage battery to the OBD hardware equipment, and the battery supplies power to the OBD hardware equipment.
Further, the battery provides 3.7V power to the OBD hardware device.
In one embodiment, the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The automatic power supply switching device for the OBD intelligent equipment is characterized by comprising a battery and a power management module, wherein the power management module comprises a PAD4 interface and a PAD7 interface, the PAD4 interface is a power input interface of the power management module, the PAD7 interface is a power output interface of the power management module, the PAD4 interface is connected with an OBD interface, the PAD7 interface is connected with an OBD hardware device, and the battery is connected between the PAD7 interface and the OBD hardware device;
when the vehicle is in a starting state, the output voltage of the OBD interface is between 12.7V and 14.4V, the power management module works normally, the automobile storage battery sequentially supplies power to the OBD hardware equipment through the OBD interface and the power management module, and the automobile storage battery charges the battery;
when the vehicle is in a flameout state, the output voltage of the OBD interface is between 12V and 12.5V, the power management module stops working to cut off the power supply of the automobile storage battery to the OBD hardware equipment, and the battery supplies power to the OBD hardware equipment.
2. The automatic power supply switching device for the OBD intelligent equipment according to claim 1, wherein the power management module comprises a power chip, a resistor R10, a resistor R23 and a resistor R28, wherein the resistor R28 and the resistor R23 are connected in series between EN terminal and VIN terminal of the power chip, the resistor R10 is connected between EN terminal and GND terminal of the power chip, and VIN terminal of the power chip is connected with the PAD4 interface;
the power management module further comprises a capacitor C8, and the capacitor C8 is connected between a BOOT end and a PH end of the power chip;
the power management module further comprises a diode D2, an inductor L3, a resistor R12, a resistor R13, a resistor R14, a capacitor C22 and a capacitor C9, wherein the negative electrode of the diode D2 is connected with the PH end of the power chip, the positive electrode of the diode D2 is connected with the GND end, one end of the inductor L3 is connected with the negative electrode of the diode D2, the other end of the inductor L3 is connected with the PAD7 interface, the resistor R12 and the resistor R13 are connected in series between the PAD7 interface and the VSENES end of the power chip, the resistor R14 is connected between the VSENES end and the GND end of the power chip, the capacitor C9 is connected between the PAD7 interface and the GND end, the capacitor C22 is connected between the PAD7 interface and the GND end, and the PAD7 interface is connected with the OBD hardware equipment;
the power management module further comprises a capacitor C17, a capacitor C18, a capacitor C19 and a resistor R9, wherein the capacitor C17 and the resistor R9 are sequentially connected in series between the COMP end and the GND end of the power chip; the capacitor C18 is connected between the COMP end and the GND end of the power chip, and the capacitor C19 is connected between the SS end and the GND end of the power chip.
3. The automatic switching device for power supply of an OBD intelligent device according to claim 2, wherein the resistance of the resistor R10 is 100K, the resistance of the resistor R23 is 510K, and the resistance of the resistor R28 is 390K.
4. The automatic switching device for power supply of an OBD smart device according to claim 3, wherein the power management module further comprises a capacitor C20 and a capacitor C21, and the capacitor C20 and the capacitor C21 are both connected between the VIN end and the GND end of the power chip.
5. The automatic power supply switching device for an OBD intelligent device according to claim 4, wherein the battery comprises a charging module and a lithium battery, the charging module is connected between the PAD7 interface and the lithium battery, and the lithium battery is connected with the OBD hardware device.
6. The automatic switching device for power supply of an OBD intelligent device according to claim 5, wherein the charging module comprises a battery management chip, an LED, a resistor R25, a resistor R26, a capacitor C29 and a capacitor C30, wherein the CHRG end and the STDBY end of the battery management chip are connected with the negative electrode of the LED, the resistor R26 is connected between the positive electrode of the LED and the PAD7 interface, the VCC end and the CE end of the battery management chip are connected with the PAD7 interface, the capacitor C29 is connected between the VCC end and the GND end of the battery management chip, the resistor R25 is connected between the PROG end and the GND end of the battery management chip, the capacitor C30 is connected between the TEMP end of the battery management chip and the BAT end of the battery management chip, the TEMP end of the battery management chip is connected with the GND end, and the BAT end of the battery management chip is connected with the lithium battery.
7. An automatic switching method of power supply of an OBD intelligent device, the switching method being based on the switching device according to claim 6, comprising the steps of:
when the vehicle is in a starting state, the output voltage of the OBD interface is between 12.7V and 14.4V, an automobile storage battery supplies power for the OBD hardware equipment, and the automobile storage battery charges the battery;
when the vehicle is in a flameout state, the output voltage of the OBD interface is between 12V and 12.5V, the power management module cuts off the power supply of the automobile storage battery to the OBD hardware equipment, and the battery supplies power to the OBD hardware equipment.
8. The method for automatically switching power supply to an OBD smart device according to claim 7, wherein said battery provides 3.7V power to said OBD hardware device.
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| CN202310069063.1A CN116513082B (en) | 2023-02-06 | 2023-02-06 | Automatic switching device and method for power supply of OBD intelligent equipment |
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| CN202310069063.1A CN116513082B (en) | 2023-02-06 | 2023-02-06 | Automatic switching device and method for power supply of OBD intelligent equipment |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982919A (en) * | 2010-11-04 | 2011-03-02 | 长安大学 | Vehicle-mounted sensor power supply used for dangerous cargo transportation monitoring |
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| CN112590686A (en) * | 2020-12-15 | 2021-04-02 | 中电海康集团有限公司 | Switching management device and switching management method for vehicle-mounted power supply |
| WO2021218744A1 (en) * | 2020-04-29 | 2021-11-04 | 深圳市道通科技股份有限公司 | Obd power supply control and management system and obd monitoring terminal |
| US20210391728A1 (en) * | 2020-06-10 | 2021-12-16 | Shenzhen Apeman Innovations Technology Co., Ltd. | Single-interface charging-discharging switchable circuit |
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2023
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| CN101982919A (en) * | 2010-11-04 | 2011-03-02 | 长安大学 | Vehicle-mounted sensor power supply used for dangerous cargo transportation monitoring |
| CN107399288A (en) * | 2016-05-20 | 2017-11-28 | 深圳市金研微科技有限公司 | The electric power system and method for supplying power to of a kind of vehicle diagnostic device |
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| CN106647710A (en) * | 2016-12-29 | 2017-05-10 | 西安大唐电信有限公司 | Low-power intelligent onboard diagnostic device and method capable of automatically switching off |
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| WO2021218744A1 (en) * | 2020-04-29 | 2021-11-04 | 深圳市道通科技股份有限公司 | Obd power supply control and management system and obd monitoring terminal |
| US20210391728A1 (en) * | 2020-06-10 | 2021-12-16 | Shenzhen Apeman Innovations Technology Co., Ltd. | Single-interface charging-discharging switchable circuit |
| CN112590686A (en) * | 2020-12-15 | 2021-04-02 | 中电海康集团有限公司 | Switching management device and switching management method for vehicle-mounted power supply |
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| CN116513082B (en) | 2023-10-13 |
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