CN107399288A - The electric power system and method for supplying power to of a kind of vehicle diagnostic device - Google Patents
The electric power system and method for supplying power to of a kind of vehicle diagnostic device Download PDFInfo
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- CN107399288A CN107399288A CN201610343661.3A CN201610343661A CN107399288A CN 107399288 A CN107399288 A CN 107399288A CN 201610343661 A CN201610343661 A CN 201610343661A CN 107399288 A CN107399288 A CN 107399288A
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention provides a kind of electric power system of vehicle diagnostic device, including power management module, isolation module, main power source, vehicle power and diagnostic equipment battery, wherein, the input of power management module is connected with the output end of main power source and the first end of isolation module respectively, the control terminal of power management module and the control terminal of isolation module connect, the second end and the 3rd end of isolation module are connected with the output end and diagnostic equipment battery of vehicle power respectively, the output end of power management module and being connected with electric device for vehicle-borne diagnosis instrument.Present invention also offers corresponding method.The present invention is vehicle diagnostic device collaboration power supply by main power source, vehicle power and diagnostic equipment battery.Meanwhile when being powered using main power source or vehicle power, it is effectively isolated diagnostic equipment battery, and when vehicle stall and vehicle power are not cut off, vehicle power will not charge to diagnostic equipment battery, the electricity entered without exhausting vehicle power, enter without influenceing vehicle launch.
Description
Technical field
The present invention relates to power technique fields, more specifically to a kind of electric power system of vehicle diagnostic device
And method of supplying power to.
Background technology
Auto analyzer in the market, much come based on tablet personal computer transformation, it is from 12V's
Vehicle power power taking, also the battery of diagnostic equipment itself can be given to charge when diagnostic equipment works, therefore once diagnosed
Finish and user does not take diagnostic equipment away from car in time, and vehicle has again in the state of flame-out very much
It may will exhaust the electricity of vehicle battery.
Meanwhile diagnostic equipment in the market, can not be general to different vehicles, such as automobile and truck,
Wherein, the power supply output of automobile is 12V, and the output of the power supply of truck is that 24V is even as high as 36V.
The content of the invention
The technical problem to be solved in the present invention is, for giving the above-mentioned of vehicle diagnostic device to lack in the prior art
Fall into, there is provided the electric power system and method for supplying power to of a kind of vehicle diagnostic device.
Technical proposal that the invention solves the above-mentioned problems there is provided a kind of electric power system of vehicle diagnostic device, institute
Stating electric power system includes power management module, isolation module, main power source, vehicle power and diagnostic equipment battery,
Wherein, the input of the power management module output end with the main power source and the isolation module respectively
First end connection, the control terminal of the power management module is connected with the control terminal of the isolation module, institute
The second end and the 3rd end for stating isolation module are electric with the output end of the vehicle power and the diagnostic equipment respectively
Pond is connected, and the output end of the power management module is connected with the vehicle-borne diagnosis instrument with electric device, described
Charging end of the diagnostic equipment battery also with the power management module is connected；It is described when the main power source inputs
Power management module exports the first control signal to be made with controlling the isolation module to isolate the diagnostic equipment battery
The main power source gives the electricity consumption power elements of the vehicle-borne diagnosis instrument, and makes the main power source to the diagnosis
Instrument battery charges；When the main power source does not input and the vehicle power inputs, the power management module
Export the second control signal makes the vehicle power to control the isolation module to isolate the diagnostic equipment battery
Electricity consumption power elements to the vehicle-borne diagnosis instrument；Do not inputted in the main power source and the vehicle power
When, the power management module exports the 3rd control signal to control the isolation module to make the diagnostic equipment electricity
The electricity consumption power elements of the vehicle-borne diagnosis instrument are given in pond.
Wherein, the electric power system also includes voltage reduction module, the input and output end point of the voltage reduction module
It is not connected with the output end of the vehicle power and the second end of the isolation module, shown voltage reduction module is used for
The output voltage exported to the output end of shown vehicle power is depressured.
Wherein, when the main power source and the vehicle power input simultaneously, the output end of the main power source is defeated
The output voltage gone out is more than the output voltage that the output end of the voltage reduction module exports.
Wherein, the isolation module includes the first voltage-regulator diode, first resistor, the first metal-oxide-semiconductor, the
Two metal-oxide-semiconductors and the first electric capacity, wherein, anode and the voltage reduction module of shown first voltage-regulator diode
Output end is connected, and the negative electrode of first voltage-regulator diode is connected with the drain electrode of first metal-oxide-semiconductor, institute
The negative electrode for stating the first voltage-regulator diode also connects by the first resistor and the gate pole of second metal-oxide-semiconductor
Connect；The source electrode of first metal-oxide-semiconductor is connected with the diagnostic equipment battery, the source electrode of first metal-oxide-semiconductor
It is connected by first electric capacity with the drain electrode of second metal-oxide-semiconductor, the drain electrode of first metal-oxide-semiconductor is also
It is connected with the output end of the main power source, the source electrode connection reference ground of second metal-oxide-semiconductor.
Wherein, the power management module includes charging management chip, wherein, the charging management chip
Drain electrode of first pin respectively with the output end and first metal-oxide-semiconductor of the main power source is connected, described to fill
Section between the 11st pin and the drain electrode of second metal-oxide-semiconductor and first electric capacity of electric managing chip
Point connection.
Present invention also offers a kind of method of supplying power to of vehicle diagnostic device, the method for supplying power to includes following step
Suddenly：
(a) main power source, vehicle power and diagnostic equipment battery are provided, to use electric device to vehicle-borne diagnosis instrument
Power supply；
(b) main power source or the vehicle power are inputted, using power management module and isolation module
So that either the vehicle power or the diagnostic equipment battery give the vehicle-borne diagnosis instrument to the main power source
Electricity consumption power elements, wherein, when the main power source inputs, first is exported using the power management module
Control signal makes the main power source to described vehicle-mounted to control the isolation module to isolate the diagnostic equipment battery
The electricity consumption power elements of diagnostic equipment, and the main power source is charged to the diagnostic equipment battery；In the master
When power supply does not input and the vehicle power inputs, the power management module exports the second control signal to control
Making the isolation module isolation diagnostic equipment battery makes use of the vehicle power to the vehicle-borne diagnosis instrument
Electric device is powered；When the main power source and the vehicle power do not input, the power management module is defeated
Go out the 3rd control signal to control the isolation module to make the diagnostic equipment battery to the vehicle-borne diagnosis instrument
Electricity consumption power elements.
Wherein, in the step (b), input before the vehicle power, also to the vehicle power
It is depressured.
Wherein, when the main power source and the vehicle power input simultaneously, the output voltage of the main power source
Output voltage after being depressured more than the vehicle power.
Wherein, the isolation module includes the first voltage-regulator diode, first resistor, the first metal-oxide-semiconductor, the
Two metal-oxide-semiconductors and the first electric capacity, wherein, anode and the voltage reduction module of shown first voltage-regulator diode
Output end is connected, and the negative electrode of first voltage-regulator diode is connected with the drain electrode of first metal-oxide-semiconductor, institute
The negative electrode for stating the first voltage-regulator diode also connects by the first resistor and the gate pole of second metal-oxide-semiconductor
Connect；The source electrode of first metal-oxide-semiconductor is connected with the diagnostic equipment battery, the source electrode of first metal-oxide-semiconductor
It is connected by first electric capacity with the drain electrode of second metal-oxide-semiconductor, the drain electrode of first metal-oxide-semiconductor is also
It is connected with the output end of the main power source, the source electrode connection reference ground of second metal-oxide-semiconductor.
Wherein, the power management module includes charging management chip, wherein, the charging management chip
Drain electrode of first pin respectively with the output end and first metal-oxide-semiconductor of the main power source is connected, described to fill
Section between the 11st pin and the drain electrode of second metal-oxide-semiconductor and first electric capacity of electric managing chip
Point connection.
The electric power system of vehicle diagnostic device and the beneficial effect of method of supplying power to of the present invention has：By main power source,
Vehicle power and diagnostic equipment battery are vehicle diagnostic device collaboration power supply.Meanwhile using main power source or vehicle-mounted
When power supply is powered, diagnostic equipment battery is effectively isolated, and when vehicle stall and vehicle power are not cut off,
Vehicle power will not charge to diagnostic equipment battery, the electricity entered without exhausting vehicle power, enter without
Influence vehicle launch.In addition, when being powered using vehicle power, compatible automobile and truck so that
Vehicle diagnostics can be carried out using the vehicle power of automobile or truck；When being powered using main power source,
Not only isolation diagnostic instrument battery is powered only main power source, but also by power management module to diagnostic equipment
Battery is charged.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of the electric power system embodiment one of the vehicle-borne diagnosis instrument of the present invention；
Fig. 2 is the structural representation of the electric power system embodiment two of the vehicle-borne diagnosis instrument of the present invention；
Fig. 3 is the physical circuit figure of the electric power system of vehicle-borne diagnosis instrument in Fig. 2；
Fig. 4 is the flow chart of the method for supplying power to embodiment of the vehicle-borne diagnosis instrument of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing and reality
Example is applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
As shown in figure 1, it is the structural representation of the electric power system embodiment one of the vehicle diagnostic device of the present invention.
The electric power system includes power management module 110, isolation module 120, main power source 130, vehicle power 140
With diagnostic equipment battery 150, main power source 130 is the electricity consumption power elements of vehicle diagnostic device, and gives diagnostic equipment electricity
Charge in pond 150, it is preferable that the output voltage of the main power source 130 is 19V；Vehicle power 140 is on vehicle
Battery, be also the electricity consumption power elements of vehicle diagnostic device；Diagnostic equipment battery 150 is arranged on vehicle diagnostics
Also it is the electricity consumption power elements of vehicle diagnostic device in instrument；Power management module 110 and isolation module 120 are set
In vehicle diagnostic device.The power supply priority of this three kinds power supplys for the electricity consumption power elements of vehicle-borne diagnosis instrument
For：The ＞ diagnostic equipments battery 150 of 130 ＞ vehicle powers of main power source 140, i.e., no matter main power source 130 and vehicle power
Whether 140 be switched on vehicle diagnostic device, and diagnostic equipment battery 150 is always in vehicle diagnostic device.Wherein, it is electric
The input of source control module 110 connects with the output end of main power source 130 and the first end of isolation module 120 respectively
Connect, the control terminal of power management module 110 is connected with the control terminal of isolation module 120, isolation module 120
Second end and the 3rd end are connected with the output end and diagnostic equipment battery 150 of vehicle power 140 respectively, power management
The output end of module 110 and being connected with electric device for vehicle-borne diagnosis instrument.Further, in the present embodiment,
Charging end of the diagnostic equipment battery 150 also with power management module 110 is connected, for when main power source inputs, leading to
Power management module 110 is crossed to charge to diagnostic equipment battery 150.
In the present embodiment, with reference to figure 1, electric power system is using main power source 130, vehicle power 140 and diagnosis
Instrument battery 150 shares power management module 110 and uses electric device, i.e. main power source 130, car to vehicle-borne diagnosis instrument
Carry power supply 140 and diagnostic equipment battery 150 shares the incoming line of the electric power system, and then car owner can be according to not
Same demand, selecting main power source 130, either vehicle power 140 or diagnostic equipment battery 150 come to OBD
The electricity consumption power elements of instrument.When main power source 130 inputs, power management module 110 exports the first control signal
To control the isolation diagnostic instrument battery 150 of isolation module 120 main power source 130 is used electric device to vehicle-borne diagnosis instrument
Power supply, now only main power source 130 gives the electricity consumption power elements of vehicle-borne diagnosis instrument, and makes main power source 130 to examining
Disconnected instrument battery 150 charges.When vehicle power 140 inputs and main power source 130 does not input, power management module
110 export the second control signals to control the isolation diagnostic instrument battery 150 of isolation module 120 to make vehicle power 140
To the electricity consumption power elements of vehicle-borne diagnosis instrument, now only vehicle power 140 uses electric device to vehicle diagnostic device
Power supply, and due to the isolation diagnostic instrument battery 150 of isolation module 120 and vehicle power 140, in vehicle diagnostics
When instrument works, vehicle power 140 can not charge to diagnostic equipment battery 150, therefore in vehicle stall and vehicle mounted electric
When source 140 is not cut off, vehicle power 140 will not charge to diagnostic equipment battery 150, enter without exhausting
The electricity of vehicle power 140.When vehicle power 140 and main power source 130 do not input, power management module
110 export the 3rd control signals to control isolation module 120 to make use of the diagnostic equipment battery 150 to vehicle-borne diagnosis instrument
Electric device is powered.
As shown in Fig. 2 it is the structural representation of the electric power system embodiment two of the vehicle diagnostic device of the present invention.
The difference of embodiment two and embodiment one is that the electric power system also includes voltage reduction module 160, the decompression mould
The input and output end of block 160 respectively with the output end of vehicle power 140 and the second end of isolation module 120
Connection, for the output voltage of the output end of vehicle power 140 to be depressured.Preferably, the decompression mould
The output voltage of vehicle power 140 is depressurized to 8.4V voltage by block 160.Due to the voltage reduction module 160, car
The output voltage range for carrying the output end output of power supply 140 is variable big, it is preferable that its output voltage range is
9V to 36V, the VD of compatible automobile and truck, the i.e. vehicle diagnostic device can use automobile or card
The vehicle power 140 of car carries out vehicle diagnostics.
Further, when main power source 130 and vehicle power 140 input simultaneously, the output electricity of main power source 130
Pressure is more than output voltage of the vehicle power 140 after voltage reduction module 160.
Below in conjunction with the physical circuit figure in Fig. 3, to the electric power system and its operation principle of the vehicle diagnostic device
Illustrate, with reference to figure 3, DCBAT_LOCK represents the output voltage of the output end output of main power source 130,
V-BAT represents the voltage of diagnostic equipment battery 150, and ACIN2 represents the output end of vehicle power 140 by decompression
Output voltage after module 160.In physical circuit in figure 3, when main power source 130 and vehicle power 140
When inputting simultaneously, DCBAT_LOCK output voltage is 19V, and ACIN2 output voltage is 8.4V.
Isolation module 120 include the first voltage-regulator diode PD1, first resistor R864, the first metal-oxide-semiconductor PQ4,
Second metal-oxide-semiconductor PQ19 and the first electric capacity C441, wherein, the first metal-oxide-semiconductor PQ4 model
QM3002N3, the second metal-oxide-semiconductor PQ19 model L2N7002LT1G.Second end of isolation module 120
For the first voltage-regulator diode PD1 anode, the first voltage-regulator diode PD1 negative electrode and the first metal-oxide-semiconductor PQ4
Drain electrode connection, the first voltage-regulator diode PD1 negative electrode also passes through first resistor R864 and the second metal-oxide-semiconductor
Gate pole connection；3rd end of isolation module 120 be the first metal-oxide-semiconductor PQ4 source electrode, the first metal-oxide-semiconductor PQ4
Source electrode be connected by the first electric capacity C441 with the second metal-oxide-semiconductor PQ19 drain electrode；First metal-oxide-semiconductor PQ4's
Drain first end also as isolation module 120, and first metal-oxide-semiconductor PQ4 drain electrode is defeated with main power source 130
Go out input of the end with power management module 110 to be connected, the second metal-oxide-semiconductor PQ19 source electrode connection reference
Ground, the node between the second metal-oxide-semiconductor PQ19 drain electrode and the first electric capacity C441 is as isolation module 120
Control terminal.
Power management module 110 includes charging management chip U33, charging management chip U33 model
Bq24735RGRT, charging management chip U33 the first pin are connected with the output end of main power source 130,
Second electric capacity C446 in parallel and second resistance R634, the in parallel second electricity between first pin and second pin
Hold C446 and second resistance R634 one end and the 3rd electric capacity C444 one end, the other end and the 4th electric capacity
C445 connections, the 3rd electric capacity C444 and the 4th electric capacity the C445 other end connect reference ground respectively, and the 5th draws
Pin is connected by 3rd resistor R639 with voltage ECVCC, and the tenth pin passes through the 4th resistance R649 and voltage
ECVCC connections, the 11st pin connect by the 5th resistance R651 and isolation module 120 control terminal, i.e., should
11st pin is the control terminal of power management module 110, and the 14th pin connection reference ground, the 15th draws
Pin is connected with the gate pole of the 4th metal-oxide-semiconductor, and the 16th pin passes through the 5th electric capacity C455 connection reference grounds, the
16 pins also by the second voltage-regulator diode PD4, the 6th electric capacity C454, the 3rd metal-oxide-semiconductor source electrode and
Node, inductance PL1 and resistance R648 between the drain electrode of 3rd metal-oxide-semiconductor are connected with diagnostic equipment battery 150,
I.e. resistance R648 one end is the charging end of power management module 110, the 17th pin and the second voltage stabilizing two
Pole pipe PD4 negative electrode connection, the 18th pin is connected with the gate pole of the 3rd metal-oxide-semiconductor, the 19th pin and the
Node connection between the drain electrode of the source electrode of three metal-oxide-semiconductors and the 3rd metal-oxide-semiconductor, the 20th pin pass through the 9th
Electric capacity C450 connection reference grounds, are also connected by the 7th resistance R641 with diode group D14 the 3rd pin,
21st pin connects reference ground.In parallel the 7th electric capacity C456 and the 8th electric capacity C457 one end and the
Node connection, other end connection reference ground between six resistance R648 and diagnostic equipment battery 150.3rd MOS
Pipe Q30A source electrode is connected with the 4th metal-oxide-semiconductor Q30B drain electrode, and the 3rd metal-oxide-semiconductor Q30A drain electrode is passed through
9th electric capacity C451 in parallel and the tenth electric capacity C452 one end are connected with the output end of main power source 130, in parallel
The 9th electric capacity C451 and the tenth electric capacity C452 the other end connection reference ground.The first of diode group D14 is drawn
Pin connects power supply AD, and second pin connects the output end of main power source 130.Wherein, diode group D14 type
Number it is LBAT54CLT1G SOT_23.
When the output voltage DCBAT_LOCK inputs of main power source 130, now the output of main power source 130 is electric
Pressure DCBAT_LOCK is more than output voltage ACIN2 of the vehicle power 140 after voltage reduction module 160 and examined
The output voltage of disconnected instrument battery 150, the control terminal output low level signal of power management module 110, that is, charge
Managing chip U33 the 11st pin output low level signal, now, the first MOS of isolation module 120
Pipe PQ4 disconnects, the output voltage DCBAT_LOCK of main power source 130 and the output electricity of diagnostic equipment battery 150
V-BAT isolation is pressed, now, the output voltage DCBAT_LOCK of main power source 130 is to vehicle diagnostic device
Electricity consumption power elements.Simultaneously as the charging management chip U33 of power management module 110 and diagnostic equipment electricity
Pond 150 connects, and main power source 130 is by the charging management chip U33 of the power management module 110 to diagnostic equipment
Battery 150 charges.
When the output voltage DCBAT_LOCK of main power source 130 is not inputted and the process decompression of vehicle power 140
When output voltage ACIN2 after module 160 is inputted, i.e., main power source 130 does not input and vehicle power 140 inputs,
The control terminal output high level signal of voltage management module, i.e. charging management chip U33 the 11st pin are defeated
Go out high level signal, now, output voltage ACIN2 of the vehicle power 140 after voltage reduction module 160 passes through
The first resistor R864 of isolation module 120 turns on the second metal-oxide-semiconductor PQ19 of isolation module 120, due to
Two metal-oxide-semiconductor PQ19 source electrode connection reference ground, and then the control terminal of isolation module 120 is pulled low ground connection, this
When, the first metal-oxide-semiconductor PQ4 of isolation module 120 disconnects, and only the output end of vehicle power 140 is by decompression mould
Electricity consumption power elements of the output voltage ACIN2 to vehicle-borne diagnosis instrument after block 160, due to the first metal-oxide-semiconductor
PQ4 disconnects, and the voltage V-BAT of diagnostic equipment battery 150 passes through voltage reduction module with the output end of vehicle power 140
Output voltage ACIN2 isolation after 160, and then supplied in vehicle power 140 to vehicle diagnostic device with electric device
When electric, vehicle power 140 will not be charged to diagnostic equipment battery 150, therefore in vehicle stall and vehicle mounted electric
When source 140 is not cut off, vehicle power 140 will not charge to diagnostic equipment battery 150, enter without exhausting
The electricity of vehicle power 140.
When main power source 130 and vehicle power 140 do not input, now, the control of power management module 110
End output high level signal, i.e. the 11st pin output high level signal of charging management chip U33, isolation
The first metal-oxide-semiconductor PQ4 conductings of module 120, the voltage V-BAT of diagnostic equipment battery 150 is to vehicle diagnostic device
Electricity consumption power elements.
In physical circuit in figure 3, high level signal is 13V signals, the first resistor of isolation module 120
R864 resistance is 4.7k ohms.
As shown in figure 4, it is the flow chart of the method for supplying power to embodiment of the vehicle diagnostic device of the present invention.With reference to figure 4,
The method of supplying power to comprises the following steps：
Step S102, main power source 130, vehicle power 140 and diagnostic equipment battery 150 are provided, to be examined to vehicle-mounted
The electricity consumption power elements of disconnected instrument；
In this step, main power source 130 and vehicle power 140 are to belong to external power supply, and then are examined in vehicle
Corresponding plug button is provided with disconnected instrument, diagnostic equipment battery 150 is arranged in vehicle diagnostic device.
Step S104, main power source 130 or vehicle power 140 are inputted, using power management module 110 and every
From module 120 so that main power source 130 either vehicle power 140 or diagnostic equipment battery 150 give vehicle-borne diagnosis instrument
Electricity consumption power elements.
Wherein, when main power source 130 inputs, the first control signal is exported using above-mentioned power management module 110
To control the above-mentioned isolation diagnostic instrument battery 150 of isolation module 120 to make main power source 130 to the vehicle-borne diagnosis instrument
Electricity consumption power elements and main power source 130 is set to be charged to diagnostic equipment battery 150；Do not input in main power source 130 and
When vehicle power 140 inputs, above-mentioned power management module 110 exports the second control signal to control above-mentioned isolation
The isolation diagnostic instrument battery 150 of module 120 makes vehicle power 140 be supplied to the vehicle-borne diagnosis instrument with electric device
Electricity；When main power source 130 and vehicle power 140 do not input, the above-mentioned output of power management module 110 the 3rd
Control signal is to control above-mentioned isolation module 120 diagnostic equipment battery 150 is used electric device to vehicle-borne diagnosis instrument
Power supply.
Especially, before vehicle power 140 is inputted, vehicle power 140 is depressured, so can be simultaneous
Hold the vehicle power 140 of different automobile types.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention not office
Be limited to this, any one skilled in the art the invention discloses technical scope in, can be easily
The change or replacement expected, it should all be included within the scope of the present invention.Therefore, protection of the invention
Scope should be defined by scope of the claims.
Claims (10)
1. a kind of electric power system of vehicle diagnostic device, it is characterised in that the electric power system includes power supply pipe
Module, isolation module, main power source, vehicle power and diagnostic equipment battery are managed, wherein, the power management mould
The input of block is connected with the output end of the main power source and the first end of the isolation module respectively, the electricity
The control terminal of source control module is connected with the control terminal of the isolation module, the second end of the isolation module and
3rd end is connected with the output end of the vehicle power and the diagnostic equipment battery respectively, the power management mould
The output end of block is connected with the vehicle-borne diagnosis instrument with electric device, the diagnostic equipment battery also with the power supply
The charging end connection of management module；When the main power source inputs, the control of power management module output first
Signal processed makes the main power source vehicle-mounted be examined to described to control the isolation module to isolate the diagnostic equipment battery
The electricity consumption power elements of disconnected instrument, and the main power source is charged to the diagnostic equipment battery；In the main electricity
When source does not input and the vehicle power inputs, the power management module exports the second control signal to control
The isolation module, which isolates the diagnostic equipment battery, makes electricity consumption of the vehicle power to the vehicle-borne diagnosis instrument
Power elements；When the main power source and the vehicle power do not input, the power management module output
3rd control signal with control the isolation module make the diagnostic equipment battery give the vehicle-borne diagnosis instrument use
Electric device is powered.
2. according to the electric power system of the vehicle diagnostic device described in claim 1, it is characterised in that the confession
Electric system also includes voltage reduction module, the input and output end of the voltage reduction module respectively with the vehicle power
Output end connected with the second end of the isolation module, shown voltage reduction module be used for shown vehicle power
The output voltage of output end output is depressured.
3. according to the electric power system of the vehicle diagnostic device described in claim 2, it is characterised in that described
Main power source and the vehicle power input simultaneously when, the output voltage of the output end output of the main power source is more than
The output voltage of the output end output of the voltage reduction module.
4. according to the electric power system of the vehicle diagnostic device described in claim 3, it is characterised in that it is described every
Include the first voltage-regulator diode, first resistor, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor and the first electricity from module
Hold, wherein, the anode of shown first voltage-regulator diode is connected with the output end of the voltage reduction module, and described the
The negative electrode of one voltage-regulator diode is connected with the drain electrode of first metal-oxide-semiconductor, first voltage-regulator diode
Negative electrode is also connected by the first resistor with the gate pole of second metal-oxide-semiconductor；First metal-oxide-semiconductor
Source electrode is connected with the diagnostic equipment battery, and the source electrode of first metal-oxide-semiconductor passes through first electric capacity and institute
State the drain electrode connection of the second metal-oxide-semiconductor, the output end to drain also with the main power source of first metal-oxide-semiconductor
Connection, the source electrode connection reference ground of second metal-oxide-semiconductor.
5. according to the electric power system of the vehicle diagnostic device described in claim 4, it is characterised in that the electricity
Source control module includes charging management chip, wherein, the first pin of the charging management chip respectively with institute
The drain electrode for stating the output end and first metal-oxide-semiconductor of main power source connects, and the tenth of the charging management chip the
Node between one pin and the drain electrode of second metal-oxide-semiconductor and first electric capacity connects.
6. a kind of method of supplying power to of vehicle diagnostic device, it is characterised in that the method for supplying power to includes following step
Suddenly：
(a) main power source, vehicle power and diagnostic equipment battery are provided, to use electric device to vehicle-borne diagnosis instrument
Power supply；
(b) main power source or the vehicle power are inputted, using power management module and isolation module
So that either the vehicle power or the diagnostic equipment battery give the vehicle-borne diagnosis instrument to the main power source
Electricity consumption power elements, wherein, when the main power source inputs, first is exported using the power management module
Control signal makes the main power source to described vehicle-mounted to control the isolation module to isolate the diagnostic equipment battery
The electricity consumption power elements of diagnostic equipment, and the main power source is charged to the diagnostic equipment battery；In the master
When power supply does not input and the vehicle power inputs, the power management module exports the second control signal to control
Making the isolation module isolation diagnostic equipment battery makes use of the vehicle power to the vehicle-borne diagnosis instrument
Electric device is powered；When the main power source and the vehicle power do not input, the power management module is defeated
Go out the 3rd control signal to control the isolation module to make the diagnostic equipment battery to the vehicle-borne diagnosis instrument
Electricity consumption power elements.
7. according to the method for supplying power to of the vehicle diagnostic device described in claim 6, it is characterised in that described
In step (b), input before the vehicle power, also the vehicle power is depressured.
8. according to the method for supplying power to of the vehicle diagnostic device described in claim 7, it is characterised in that described
Main power source and the vehicle power input simultaneously when, the output voltage of the main power source is more than the vehicle power
Output voltage after decompression.
9. according to the method for supplying power to of the vehicle diagnostic device described in claim 8, it is characterised in that it is described every
Include the first voltage-regulator diode, first resistor, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor and the first electricity from module
Hold, wherein, the anode of shown first voltage-regulator diode is connected with the output end of the voltage reduction module, and described the
The negative electrode of one voltage-regulator diode is connected with the drain electrode of first metal-oxide-semiconductor, first voltage-regulator diode
Negative electrode is also connected by the first resistor with the gate pole of second metal-oxide-semiconductor；First metal-oxide-semiconductor
Source electrode is connected with the diagnostic equipment battery, and the source electrode of first metal-oxide-semiconductor passes through first electric capacity and institute
State the drain electrode connection of the second metal-oxide-semiconductor, the output end to drain also with the main power source of first metal-oxide-semiconductor
Connection, the source electrode connection reference ground of second metal-oxide-semiconductor.
10. according to the method for supplying power to of the vehicle diagnostic device described in claim 9, it is characterised in that described
Power management module includes charging management chip, wherein, the first pin of the charging management chip respectively with
The drain electrode of the output end of the main power source and first metal-oxide-semiconductor connects, and the of the charging management chip
Node between 11 pins and the drain electrode of second metal-oxide-semiconductor and first electric capacity connects.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358548A (en) * | 2018-10-31 | 2019-02-19 | 深圳市元征科技股份有限公司 | A kind of charging method of automotive diagnostic system, vehicle diagnosis and automotive diagnostic unit |
| CN111064464A (en) * | 2020-01-03 | 2020-04-24 | 深圳市道通科技股份有限公司 | An isolation circuit, automotive diagnostic equipment and automotive diagnostic system |
| EP4009474A4 (en) * | 2019-09-18 | 2022-11-23 | Autel Intelligent Technology Corp. Ltd. | CHARGING APPARATUS, CHARGING METHOD, AND ELECTRONIC DEVICE |
| WO2022267828A1 (en) * | 2021-06-24 | 2022-12-29 | 深圳市道通科技股份有限公司 | Connector of storage battery and detection system and method for storage battery |
| CN116513082A (en) * | 2023-02-06 | 2023-08-01 | 江西新画卷科技有限公司 | Automatic switching device and method for power supply of OBD intelligent equipment |
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2016
- 2016-05-20 CN CN201610343661.3A patent/CN107399288A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358548A (en) * | 2018-10-31 | 2019-02-19 | 深圳市元征科技股份有限公司 | A kind of charging method of automotive diagnostic system, vehicle diagnosis and automotive diagnostic unit |
| EP4009474A4 (en) * | 2019-09-18 | 2022-11-23 | Autel Intelligent Technology Corp. Ltd. | CHARGING APPARATUS, CHARGING METHOD, AND ELECTRONIC DEVICE |
| CN111064464A (en) * | 2020-01-03 | 2020-04-24 | 深圳市道通科技股份有限公司 | An isolation circuit, automotive diagnostic equipment and automotive diagnostic system |
| WO2022267828A1 (en) * | 2021-06-24 | 2022-12-29 | 深圳市道通科技股份有限公司 | Connector of storage battery and detection system and method for storage battery |
| CN116513082A (en) * | 2023-02-06 | 2023-08-01 | 江西新画卷科技有限公司 | Automatic switching device and method for power supply of OBD intelligent equipment |
| CN116513082B (en) * | 2023-02-06 | 2023-10-13 | 江西新画卷科技有限公司 | Automatic switching device and method for power supply of OBD intelligent equipment |
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Application publication date: 20171128 |