CN208461460U - A kind of vehicle-mounted accessory power supply reverse-connection protection circuit - Google Patents
A kind of vehicle-mounted accessory power supply reverse-connection protection circuit Download PDFInfo
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- CN208461460U CN208461460U CN201821023473.3U CN201821023473U CN208461460U CN 208461460 U CN208461460 U CN 208461460U CN 201821023473 U CN201821023473 U CN 201821023473U CN 208461460 U CN208461460 U CN 208461460U
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Abstract
The utility model discloses a kind of vehicle-mounted accessory power supply reverse-connection protection circuits; with vehicle electronic circuit interface and auxiliary power interface; the vehicle electronic circuit interface anode connection auxiliary power interface anode; power switch is concatenated between vehicle electronic circuit interface cathode and auxiliary power interface cathode; polarity discriminating module is concatenated between vehicle electronic circuit interface positive and negative electrode or between auxiliary power interface positive and negative electrode, polarity discriminating module controls the on-off of power switch according to the electric power polarity detected；The utility model uses the technical solution that switch mosfet pipe carries out counnter attack; in the case of loss and baby battery power shortage can be effectively reduced, due to the presence without obvious diode drop; it still is able to be supplied to Vehicular charger or the higher voltage of vehicle-mounted DC-DC, there is stable defencive function.
Description
Technical field
The utility model relates to electric car charging technique field more particularly to a kind of Vehicular chargers or vehicle-mounted DC-
The accessory power supply reverse-connection protection circuit of DC.
Background technique
With energy-saving and emission-reduction, and the demand of control atmosphere pollution, new-energy automobile is gradually commercial in market, and electronic vapour
Vehicle is even more the main force of new-energy automobile.Electric car is divided into pure electric automobile and mixed electrical automobile again, wherein Vehicular charger and
Vehicle-mounted DC-DC is component part important in electric car.Vehicular charger and vehicle-mounted DC-DC use outer low pressure battery
Auxiliary power supply is provided, outer low pressure battery is because natural aging or failure and other reasons need replacing maintenance, if not using has
The anti-reverse design of effect, will cause the damage of vehicle electronic circuit.The mode that industry generallys use at present is the direct counnter attack of diode
Scheme, but the program haves the defects that diode drop is big, energy consumption is high.So needing to develop in the industry, a kind of energy consumption is small, guarantee degree
High vehicle-mounted accessory power supply reverse-connection protection circuit.
Utility model content
The utility model is the defect that prior art pressure drop to be solved is big, energy consumption is high, proposes that a kind of energy consumption is small, guarantee degree is high
Vehicle-mounted accessory power supply reverse-connection protection circuit.
In order to solve the above technical problems, the utility model proposes technical solution be to design a kind of vehicle-mounted accessory power supply reversal connection
Circuit to be protected, there is vehicle electronic circuit interface and auxiliary power interface, vehicle electronic circuit interface anode connects auxiliary power interface anode,
Power switch is concatenated between vehicle electronic circuit interface cathode and auxiliary power interface cathode, between vehicle electronic circuit interface positive and negative electrode
Or polarity discriminating module is concatenated between auxiliary power interface positive and negative electrode, polarity discriminating module is according to the power supply pole detected
Property control power switch on-off.
The power switch uses switch mosfet pipe, and source electrode connects the vehicle electronic circuit interface cathode, its drain electrode meets institute
State auxiliary power interface cathode, its grid connects the polarity discriminating module.
The polarity discriminating module includes being serially connected in the vehicle electronic circuit interface anode and the switch mosfet tube grid
Between the 7th resistance, and two pole of pressure stabilizing being connected in parallel between switch mosfet tube grid and the vehicle electronic circuit interface cathode
Pipe, the 6th resistance, the 4th capacitor, wherein the anode of the zener diode connects the vehicle electronic circuit interface cathode, cathode connects
Connect the switch mosfet tube grid.
Tandem electric inductance L5 between the anode of the vehicle electronic circuit interface and the anode of auxiliary power interface.
Filter capacitor module is connected between the positive and negative electrode of the auxiliary power interface.
The filter capacitor module includes first be connected in parallel between auxiliary power interface anode and cathode, the
Two, third capacitance group, the first capacitor group include the second capacitor and the 5th capacitor being cascaded, second capacitance group
Including the third capacitor and the 6th capacitor being cascaded, the third capacitance group includes the 7th electricity being sequentially connected in series together
Appearance, the 8th capacitor, the tenth capacitor and the 9th capacitor, wherein the tie point of the 8th capacitor and the tenth capacitor is grounded
Compared with prior art, the utility model uses the technical solution that switch mosfet pipe carries out counnter attack, Ke Yiyou
In the case of effect reduces loss and baby battery power shortage, due to the presence without obvious diode drop, it still is able to be supplied to vehicle-mounted fill
Motor or the higher voltage of vehicle-mounted DC-DC have stable defencive function.
Detailed description of the invention
Fig. 1 is the functional block diagram of the utility model preferred embodiment；
Fig. 2 is the circuit diagram of the utility model preferred embodiment.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is described in further detail the utility model.It should be appreciated that specific embodiment described herein is used only for explaining this
Utility model is not used to limit the utility model.
The utility model discloses a kind of vehicle-mounted accessory power supply reverse-connection protection circuit, referring to functional block diagram shown in fig. 1,
Auxiliary power interface with the vehicle electronic circuit interface and connection baby battery that connect interior electric appliance, it is auxiliary that it is polar, which to be easy wrong,
Power interface.Vehicle electronic circuit interface anode 12V+ connection auxiliary power interface anode KL30, vehicle electronic circuit interface cathode PGND with
Power switch is concatenated between auxiliary power interface cathode J_KL_31, between vehicle electronic circuit interface positive and negative electrode or in auxiliary electricity
Polarity discriminating module is concatenated between source interface positive and negative electrode, polarity discriminating module is opened according to the electric power polarity control power supply detected
The on-off of pass.Such as the non-wrong of accessory power supply (baby battery) polarity, the conducting of polarity discriminating module drive power switch, baby battery is to vehicle
Carry circuit power supply；If electric power polarity is reversed, polarity discriminating module drive power switch cut-off, baby battery is separated with vehicle electronic circuit,
Vehicle electronic circuit is protected.
In the preferred embodiment, the power switch uses switch mosfet pipe Q1, and source electrode connects the vehicle electronic circuit and connects
Mouth cathode, its drain electrode connect the auxiliary power interface cathode, its grid connects the polarity discriminating module.Switch mosfet pipe is led
Internal resistance is extremely low when logical, and electric current is little in circuit in addition, so the pressure drop of switch mosfet pipe is extremely low, can be neglected.In small electricity
In the case of the power shortage of pond, due to the presence without obvious diode drop, still be able to be supplied to Vehicular charger or vehicle-mounted DC-DC compared with
High voltage.
Referring to Fig. 2 shows preferred embodiment, the polarity discriminating module include be serially connected in the vehicle electronic circuit interface just
The 7th resistance R7 between pole and the switch mosfet tube grid, and be connected in parallel on switch mosfet tube grid with it is described vehicle-mounted
Zener diode D1, the 6th resistance R6, the 4th capacitor C4 between circuit interface cathode, wherein the anode of the zener diode
Connect the vehicle electronic circuit interface cathode, cathode connects the switch mosfet tube grid.When correct for electrical bonding, Q1 by
KL30 is driven, in the conductive state, and baby battery is powered to vehicle electronic circuit；When for electrical bonding mistake, the driving of Q1 does not have
Power supply is in off state, and diode also ends naturally in vivo, and baby battery cannot power to vehicle electronic circuit.
Tandem electric inductance between the anode of the vehicle electronic circuit interface and the anode of auxiliary power interface in the preferred embodiment
L5.L5 can be in powered on moment limit inrush currents, anti-current impact.
In the preferred embodiment, filter capacitor module is connected between the positive and negative electrode of the auxiliary power interface.Filter capacitor
Module can effectively filter power supply, improve power supply stability.
Referring to Fig. 2, the filter capacitor module includes being connected in parallel between the auxiliary power interface anode and cathode
The first, second, third capacitance group, the first capacitor group includes the second capacitor C2 and the 5th capacitor C5 being cascaded,
Second capacitance group includes the third capacitor C3 and the 6th capacitor C6 being cascaded, and the third capacitance group includes successively going here and there
The 7th capacitor C7, the 8th capacitor C8, the tenth capacitor C10 and the 9th capacitor C9 being linked togather, wherein the 8th capacitor C8 and the tenth
The tie point of capacitor C10 is grounded.
Above embodiments are by way of example only, non-to provide constraints.It is any without departing from the application spirit and scope, and to it
The equivalent modifications or change of progress, shall be included in the scope of claims of this application.
Claims (6)
1. a kind of vehicle-mounted accessory power supply reverse-connection protection circuit has vehicle electronic circuit interface and auxiliary power interface, it is characterised in that:
Vehicle electronic circuit interface anode connects auxiliary power interface anode, goes here and there between vehicle electronic circuit interface cathode and auxiliary power interface cathode
Power switch is connect, concatenates polarity discriminating between vehicle electronic circuit interface positive and negative electrode or between auxiliary power interface positive and negative electrode
Module, polarity discriminating module control the on-off of power switch according to the electric power polarity detected.
2. vehicle-mounted accessory power supply reverse-connection protection circuit as described in claim 1, it is characterised in that: the power switch uses
Switch mosfet pipe (Q1), source electrode connects the vehicle electronic circuit interface cathode, its drain electrode connects the auxiliary power interface cathode, it
Grid connects the polarity discriminating module.
3. vehicle-mounted accessory power supply reverse-connection protection circuit as claimed in claim 2, it is characterised in that: the polarity discriminating module packet
The 7th resistance (R7) being serially connected between the vehicle electronic circuit interface anode and the switch mosfet tube grid is included, and in parallel
Zener diode (D1), the 6th resistance (R6) between switch mosfet tube grid and the vehicle electronic circuit interface cathode,
Four capacitors (C4), wherein the anode of the zener diode connects described in the vehicle electronic circuit interface cathode, cathode connection
Switch mosfet tube grid.
4. vehicle-mounted accessory power supply reverse-connection protection circuit as described in claim 1, it is characterised in that: the vehicle electronic circuit interface
Tandem electric inductance (L5) between anode and the anode of auxiliary power interface.
5. vehicle-mounted accessory power supply reverse-connection protection circuit as described in claim 1, it is characterised in that: the auxiliary power interface
Filter capacitor module is connected between positive and negative electrode.
6. vehicle-mounted accessory power supply reverse-connection protection circuit as claimed in claim 5, it is characterised in that: the filter capacitor module packet
Include the first, second, third capacitance group being connected in parallel between the auxiliary power interface anode and cathode, the first capacitor
Group includes the second capacitor (C2) and the 5th capacitor (C5) that are cascaded, and second capacitance group includes the to be cascaded
Three capacitors (C3) and the 6th capacitor (C6), the third capacitance group include being sequentially connected in series the 7th capacitor (C7) together, the 8th
Capacitor (C8), the tenth capacitor (C10) and the 9th capacitor (C9), wherein the tie point of the 8th capacitor (C8) and the tenth capacitor (C10)
Ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821023473.3U CN208461460U (en) | 2018-06-29 | 2018-06-29 | A kind of vehicle-mounted accessory power supply reverse-connection protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821023473.3U CN208461460U (en) | 2018-06-29 | 2018-06-29 | A kind of vehicle-mounted accessory power supply reverse-connection protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208461460U true CN208461460U (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821023473.3U Active CN208461460U (en) | 2018-06-29 | 2018-06-29 | A kind of vehicle-mounted accessory power supply reverse-connection protection circuit |
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| CN (1) | CN208461460U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289607A (en) * | 2019-06-20 | 2019-09-27 | 深圳市中创工业互联网有限公司 | A kind of hot plug protection circuit and method |
-
2018
- 2018-06-29 CN CN201821023473.3U patent/CN208461460U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289607A (en) * | 2019-06-20 | 2019-09-27 | 深圳市中创工业互联网有限公司 | A kind of hot plug protection circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000, 5 floor, Fengyun mansion, five road north, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee after: Shenzhen Vmax Power Co.,Ltd. Address before: 518000 Fengyun Science and Technology Building, No. 5 Industrial Zone, North Ring Road, Nanshan District, Shenzhen City, Guangdong Province, 501 Patentee before: Shenzhen Vmax Power Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A reverse connection protection circuit for on-board auxiliary power supply Effective date of registration: 20210918 Granted publication date: 20190201 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: Shenzhen Vmax Power Co.,Ltd. Registration number: Y2021980009619 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20221017 Granted publication date: 20190201 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: Shenzhen Vmax Power Co.,Ltd. Registration number: Y2021980009619 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A reverse connection protection circuit for vehicle auxiliary power supply Effective date of registration: 20221031 Granted publication date: 20190201 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: Shenzhen Vmax Power Co.,Ltd. Registration number: Y2022980020184 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |