CN108183469A - One kind prevents flash driving power reverse-connection protection circuit and entire car controller - Google Patents

One kind prevents flash driving power reverse-connection protection circuit and entire car controller Download PDF

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Publication number
CN108183469A
CN108183469A CN201810002391.9A CN201810002391A CN108183469A CN 108183469 A CN108183469 A CN 108183469A CN 201810002391 A CN201810002391 A CN 201810002391A CN 108183469 A CN108183469 A CN 108183469A
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CN
China
Prior art keywords
circuit
mos pipe
power mos
connect
load
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Application number
CN201810002391.9A
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Chinese (zh)
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CN108183469B (en
Inventor
刘海洋
翟钧
肖利华
李祥
童斌
廖名修
杜露涛
Original Assignee
重庆长安汽车股份有限公司
重庆长安新能源汽车有限公司
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Priority to CN201810002391.9A priority Critical patent/CN108183469B/en
Publication of CN108183469A publication Critical patent/CN108183469A/en
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Publication of CN108183469B publication Critical patent/CN108183469B/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H02H11/003Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection using a field effect transistor as protecting element in one of the supply lines

Abstract

This application discloses one kind to prevent flash driving power reverse-connection protection circuit, including:Control circuit, power supply, relay, diode, the first power MOS pipe and load circuit;Control circuit is connect respectively with the first power MOS pipe grid and load circuit, the drain electrode of first power MOS pipe is connect with diode cathode, diode cathode is connect with relay input terminal, relay normal-closed end is connect with power supply one end, the power supply other end is connect with load circuit, and be grounded, load circuit is connect with relay normally open end;Wherein, connection TVS protection circuits, the first power MOS pipe Substrate ground between the drain electrode of the first power MOS pipe and source electrode;Load circuit controls the operation of N number of load, and load circuit includes protecting circuit.The application only need to ensure that load circuit in the case of reverse power connection by a diode and a relay, and circuit is in a safe condition, greatly reduces the cost of circuit.The present invention further correspondingly discloses a kind of entire car controller and new-energy automobile.

Description

One kind prevents flash driving power reverse-connection protection circuit and entire car controller

Technical field

The present invention relates to entire car controller field, more particularly to one kind prevents flash driving power reverse-connection protection circuit and whole Vehicle controller.

Background technology

With being constantly progressive for science and technology, more and more automobiles have many intelligentized functions, lead to automobile In the demand that is driven to flash of entire car controller it is increasing, wherein how to prevent driving power reversal connection for promoting garage The safety sailed has highly important researching value.

In the regular job for assembling or repairing automobile, reverse power connection causes entire car controller to be subject to reversed electricity The influence of pressure, and then the parts of automobile are damaged, therefore relevant automotive regulation, all the anti-reverse ability of automobile controller is done Regulation, it is therefore desirable to engineer is in the reverse-connection protection circuit of design vehicle, automobile can stable operation as designing drive The overriding concern factor of dynamic circuit.

The method that tradition is used for preventing driving power reversal connection circuit is hindered by way of adding diode in circuit The circulation of stream is powered off, and then prevents the reversal connection of driving power, influence during reducing electric voltage reverse-connection to circuit.But with vehicle Flash drives increasing for quantity in controller, can increase the usage quantity of diode, can not only increase entire car controller in this way Cost, it is very few to also result in other component free space in entire car controller, so by what kind of mode come preferably The reversal connection of multichannel flash driving power is prevented, is those skilled in the art's problem urgently to be resolved hurrily.

Invention content

In view of this, the purpose of the present invention is to provide one kind to prevent flash driving power reverse-connection protection circuit and vehicle control Device processed can not only protect circuit reversal connection, but also can reduce the purpose of circuit cost to reach.Its concrete scheme is as follows:

One kind prevents flash driving power reverse-connection protection circuit, including:

Control circuit, power supply, relay, diode, the first power MOS pipe and load circuit;

The control circuit is connect respectively with the first power MOS pipe grid and the load circuit, first work( The drain electrode of rate metal-oxide-semiconductor is connect with the diode cathode, and the diode cathode is connect with the relay input terminal, the relay Device normal-closed end is connect with described power supply one end, and the power supply other end is connect, and be grounded with the load circuit, the load electricity Road is connect with the relay normally open end;

Wherein, connection TVS protection circuits, first power MOS pipe between the first power MOS pipe drain electrode and source electrode Substrate ground;The load circuit controls the operation of N number of load, and the load circuit includes protecting circuit, N >=2.

Preferably, the load circuit includes the power MOS pipe group of N number of parallel connection;

Wherein, each power MOS pipe group includes the second power MOS pipe and load, N >=2;Second power MOS pipe Connection TVS protection circuits between drain electrode and source electrode, and the connection load of each second power MOS pipe substrate, and be grounded.

Preferably, the power supply is lead-acid battery.

Preferably, first power MOS pipe and second power MOS pipe are the enhanced metal-oxide-semiconductor of N-channel.

Preferably, the TVS protections circuit includes the first transient diode and the second transient diode.

Correspondingly, the invention also discloses a kind of entire car controller, disclosed prevent flash driving power anti-including aforementioned Connect protection circuit.

Correspondingly, the invention also discloses a kind of new-energy automobile, including aforementioned disclosed entire car controller.

In the present invention, one kind prevents flash driving power reverse-connection protection circuit, including:Control circuit, power supply, relay Device, diode, the first power MOS pipe and load circuit;Control circuit connects respectively with the first power MOS pipe grid and load circuit It connects, the drain electrode of the first power MOS pipe is connect with diode cathode, and diode cathode is connect with relay input terminal, and relay is normally closed End is connect with power supply one end, and the power supply other end is connect with load circuit, and is grounded, and load circuit is connect with relay normally open end; Wherein, connection TVS protection circuits, the first power MOS pipe Substrate ground between the drain electrode of the first power MOS pipe and source electrode;Load electricity Road controls the operation of N number of load, and load circuit includes protecting circuit, N >=2.

When circuit works normally, control circuit is connect respectively with the first power MOS pipe grid and load circuit, the first work( The drain electrode of rate metal-oxide-semiconductor is connect with diode cathode, and diode cathode is connect with relay input terminal, and relay normal-closed end and power supply are just Pole connects, and power cathode is connect with load circuit, and is grounded, and load circuit is connect with relay normally open end;Control circuit is One power MOS pipe provides high level, so that the first metal-oxide-semiconductor is in the conduction state, so that relay is closed, to flash Driving provides power supply, so as to provide power supply to N number of load, realizes flash driving function.

When reverse power connection, control circuit is connect respectively with the first power MOS pipe grid and load circuit, the first power Metal-oxide-semiconductor drain electrode is connect with diode cathode, and diode cathode is connect with relay input terminal, relay normal-closed end and power cathode Connection, positive pole is connect with load circuit, and is grounded, and load circuit is connect with relay normally open end;In first power MOS pipe TVS protection circuit grounds, electric current flows to the cathode of diode from TVS, but diode at this time is cut-off state, cause after Electric appliance can not be closed;And at this point, electric current flows to relay from the protection circuit of load circuit, but relay patent at this time It closes so that electric current cannot be formed into a loop, so that entire circuit is in a safe condition.It can be seen that it in the present invention, only needs Pass through a diode and a relay, it is possible to which for proof load circuit in the case of reverse power connection, circuit is in safety State greatly reduces the cost of circuit.

Description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.

Fig. 1 is that one kind that the embodiment of the present invention one provides prevents flash driving power reverse-connection protection circuit figure;

Fig. 2 prevents flash driving power reverse-connection protection circuit figure for one kind provided by Embodiment 2 of the present invention.

Specific embodiment

Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work Embodiment shall fall within the protection scope of the present invention.

The embodiment of the invention discloses one kind to prevent flash driving power reverse-connection protection circuit figure, shown in Figure 1, this is anti- Only flash driving power reverse-connection protection circuit includes:

Control circuit, power supply, relay, diode, the first power MOS pipe and load circuit;Control circuit is respectively with One power MOS pipe grid is connected with load circuit, the first power MOS pipe drain electrode connect with diode cathode, diode cathode and Relay input terminal connects, and relay normal-closed end is connect with power supply one end, and the power supply other end is connect with load circuit, and is grounded, Load circuit is connect with relay normally open end;Wherein, connection TVS protection circuits between the drain electrode of the first power MOS pipe and source electrode, the One power MOS pipe Substrate ground;Load circuit controls the operation of N number of load, and load circuit includes protecting circuit, N >=2.

It is understood that the type of power supply includes but not limited to common lead-acid battery, it can also be other kinds of Accumulator, all are not construed as limiting herein for the purpose of reaching practical application;It is enhanced that power MOS pipe includes but not limited to N-channel Metal-oxide-semiconductor, TVS protection circuits are the components in effective protection circuit in order to provide circuit leakage path and clamper function, TVS protection circuits herein include but not limited to transient diode.

When circuit works normally, control circuit is connect respectively with the first power MOS pipe grid and load circuit, the first work( The drain electrode of rate metal-oxide-semiconductor is connect with diode cathode, and diode cathode is connect with relay input terminal, and relay normal-closed end and power supply are just Pole connects, and power cathode is connect with load circuit, and is grounded, and load circuit is connect with relay normally open end;Control circuit is One power MOS pipe provides high level, so that the first metal-oxide-semiconductor is in the conduction state, so that relay is closed, to flash Driving provides power supply, so that providing power supply to N number of load, realizes flash driving function.

When reverse power connection, control circuit is connect respectively with the first power MOS pipe grid and load circuit, the first power Metal-oxide-semiconductor drain electrode is connect with diode cathode, and diode cathode is connect with relay input terminal, relay normal-closed end and power cathode Connection, positive pole is connect with load circuit, and is grounded, and load circuit is connect with relay normally open end;In first power MOS pipe TVS protection circuit grounds, electric current flows to the cathode of diode from TVS, but diode at this time is cut-off state, cause after Electric appliance can not be closed;And at this point, electric current flows to relay from the protection circuit of load circuit, but relay patent at this time It closes so that electric current cannot be formed into a loop, so that entire circuit is in a safe condition.It can be seen that it in the present invention, only needs Pass through a diode and a relay, it is possible to which for proof load circuit in the case of reverse power connection, circuit is in safety State greatly reduces the cost of circuit.

Moreover, using the structure chart for preventing flash driving power reverse-connection protection circuit in the present invention, it is also possible that Maintenance personal is much less workload, improves the working efficiency of maintenance personal when checking either maintenance failure circuit.

The embodiment of the invention discloses one kind specifically to prevent flash driving power reverse-connection protection circuit figure, referring to Fig. 2 institutes Show, relative to a upper embodiment, the present embodiment has made further instruction and optimization to technical solution.Specifically, this prevents height Side driving power reverse-connection protection circuit includes:

Control circuit 11, relay 61, lead-acid battery 62, the first power MOS pipe, load circuit and diode D22,

Wherein, the first power MOS pipe includes the enhanced metal-oxide-semiconductor 21 of the first N-channel and TVS protection circuits 23, and TVS23 includes First transient diode and the second transient diode;

The drain electrode of first N-channel enhanced metal-oxide-semiconductor 21 and source electrode connect respectively the first transient diode cathode in TVS23 and Second transient diode cathode, the first transient diode anode and the connection of the second transient diode anode, and be grounded, the first N ditches Enhanced 21 Substrate ground of metal-oxide-semiconductor in road;

Wherein, load circuit is the power MOS pipe group of N number of parallel connection, and it is enhanced that i-th of power MOS pipe includes the second N-channel Metal-oxide-semiconductor 3i and TVS4iProtect circuit, TVS4iProtect circuit include third transient diode and the 4th transient diode, 1≤i≤ N;

The enhanced metal-oxide-semiconductor 3i drain electrodes of second N-channel and source electrode connect TVS respectively4iIn third transient diode cathode and 4th transient diode cathode, third transient diode anode and the connection of the 4th transient diode anode, and be grounded, the 2nd N ditches One end of the enhanced metal-oxide-semiconductor 3i substrates connection load 5i in road loads the other end ground connection of 5i;

When circuit works normally, control circuit 11 is respectively in 21 grid of the first power MOS pipe and load circuit N number of The enhanced metal-oxide-semiconductor 3i grids connection of two N-channels, the drain electrode of the first power MOS pipe 21 are connect with diode D22 cathode, diode D22 Anode is connect with 61 input terminal of relay, and 61 normal-closed end of relay is connect with 62 anode of lead-acid battery, 62 cathode of lead-acid battery with The protection circuit TVS of the enhanced metal-oxide-semiconductor 3i of N number of second N-channel in load circuit4iConnection, and be grounded, the N in load circuit A enhanced metal-oxide-semiconductor 3i drain electrodes of second N-channel are connect with relay normally open end;Control circuit provides height for the first power MOS pipe Level so that the first metal-oxide-semiconductor is in the conduction state, so that relay is closed, drives to flash and provides power supply, so as to Make to provide power supply to N number of load, realize flash driving function.

When reverse power connection, control circuit 11 respectively with the 2nd N N number of in 21 grid of the first power MOS pipe and load circuit Channel enhancement metal-oxide-semiconductor 3i grids connect, and the drain electrode of the first power MOS pipe 21 is connect with diode D22 cathode, and diode D22 is just Pole is connect with 61 input terminal of relay, and 61 normal-closed end of relay is connect with 62 cathode of lead-acid battery, and 62 anode of lead-acid battery is with bearing Carry the protection circuit TVS of the enhanced metal-oxide-semiconductor 3i of N number of second N-channel in circuit4iConnection, and be grounded, it is N number of in load circuit The enhanced metal-oxide-semiconductor 3i drain electrodes of second N-channel are connect with relay normally open end;Diode D22 is in cut-off state, and electric current cannot lead to It crosses diode D22 and flows to relay 61, relay 61 cannot be closed, and at this point, electric current passes through TVS from B points4iA points are flowed to, due to Relay 61 is not closed, and electric current can not flow back into D points from A points, and electric current can not be allowed to form a circuit, so entire circuit is in Safe condition.After power up is normal, entire circuit can then work according to normal operating mode, improve circuit Safety.And in the prior art, need between the enhanced metal-oxide-semiconductor of the second N-channel and the power supply in load circuit Diode is added, to prevent the reversal connection of power supply, still, with the increase of flash driving quantity, the quantity of diode can also increase, The cost of vehicle device is not only increased, and but also the free space of vehicle device becomes smaller, it can be seen that, in the present invention In, only it need to pass through a diode and a relay, it is possible to which proof load circuit is in the case of reverse power connection, at circuit In safe condition, the cost of circuit is greatly reduced.

The invention also discloses a kind of entire car controller, disclosed prevent flash driving power reverse connecting protection electric including aforementioned Road.

It is understood that the entire car controller in the present embodiment, because having used aforementioned disclosed flash driving power Reverse-connection protection circuit can not only effectively reduce the cost of entire car controller, moreover, also so that entire car controller other The free space of component becomes larger, and improves the practical performance of entire car controller.Certainly, in practical application, to vehicle control The parameter and model of all kinds of components in device processed in flash driving power reverse-connection protection circuit are not construed as limiting, all are to reach real For the purpose of the application of border.

The invention also discloses a kind of new-energy automobile, including aforementioned disclosed entire car controller.

Specifically, new-energy automobile currently on the market, because being integrated with more and more intelligent functions, by The popular welcome of consumer.And the new-energy automobile in the present embodiment, the cost of new energy is not only reduced, and cause The new-energy automobile has the stronger market competitiveness.

Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant meaning Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that A little elements, but also including other elements that are not explicitly listed or further include for this process, method, article or The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged Except also there are other identical elements in the process, method, article or apparatus that includes the element.

Flash driving power reverse-connection protection circuit is prevented to one kind provided by the present invention above, is described in detail, Specific case used herein is expounded the principle of the present invention and embodiment, and the explanation of above example is only used In facilitating the understanding of the method and its core concept of the invention;Meanwhile for those of ordinary skill in the art, according to the present invention Thought, there will be changes in specific embodiments and applications, in conclusion the content of the present specification should not be construed as Limitation of the present invention.

Claims (7)

1. one kind prevents flash driving power reverse-connection protection circuit, which is characterized in that including:
Control circuit, power supply, relay, diode, the first power MOS pipe and load circuit;
The control circuit is connect respectively with the first power MOS pipe grid and the load circuit, the first power MOS Pipe drain electrode is connect with the diode cathode, and the diode cathode is connect with the relay input terminal, and the relay is normal Closed end is connect with described power supply one end, and the power supply other end is connect, and be grounded with the load circuit, the load circuit with The relay normally open end connection;
Wherein, connection TVS protection circuits, the first power MOS pipe substrate between the first power MOS pipe drain electrode and source electrode Ground connection;The load circuit controls the operation of N number of load, and the load circuit includes protecting circuit, N >=2.
2. circuit according to claim 1, which is characterized in that the load circuit includes the power MOS pipe of N number of parallel connection Group;
Wherein, each power MOS pipe group includes the second power MOS pipe and load, N >=2;The second power MOS pipe drain electrode TVS protection circuits, and the connection load of each second power MOS pipe substrate are connected between source electrode, and is grounded.
3. circuit according to claim 1, which is characterized in that the power supply is lead-acid battery.
4. circuit according to claim 1, which is characterized in that first power MOS pipe and second power MOS pipe For the enhanced metal-oxide-semiconductor of N-channel.
5. circuit according to claim 1, which is characterized in that TVS protection circuit include the first transient diode and Second transient diode.
6. a kind of entire car controller, which is characterized in that prevent flash driving electricity including such as described in any one of claim 1 to 5 Source reverse-connection protection circuit.
7. a kind of new-energy automobile, which is characterized in that wrap entire car controller as claimed in claim 6.
CN201810002391.9A 2018-01-02 2018-01-02 Prevent that high limit drive power supply from connecting protection circuit and vehicle control unit in reverse CN108183469B (en)

Priority Applications (1)

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CN201810002391.9A CN108183469B (en) 2018-01-02 2018-01-02 Prevent that high limit drive power supply from connecting protection circuit and vehicle control unit in reverse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810002391.9A CN108183469B (en) 2018-01-02 2018-01-02 Prevent that high limit drive power supply from connecting protection circuit and vehicle control unit in reverse

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CN108183469A true CN108183469A (en) 2018-06-19
CN108183469B CN108183469B (en) 2020-02-07

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201674224U (en) * 2010-04-02 2010-12-15 石家庄国耀电子科技有限公司 Reverse connection proof buffer protection device for direct current power supply input
CN103904620A (en) * 2012-12-28 2014-07-02 中兴通讯股份有限公司 Direct current power supply input reverse irrigation prevention circuit and method
CN105743076A (en) * 2014-12-12 2016-07-06 安徽艾可蓝节能环保科技有限公司 Power source reversal connection prevention circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201674224U (en) * 2010-04-02 2010-12-15 石家庄国耀电子科技有限公司 Reverse connection proof buffer protection device for direct current power supply input
CN103904620A (en) * 2012-12-28 2014-07-02 中兴通讯股份有限公司 Direct current power supply input reverse irrigation prevention circuit and method
CN105743076A (en) * 2014-12-12 2016-07-06 安徽艾可蓝节能环保科技有限公司 Power source reversal connection prevention circuit

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SE01 Entry into force of request for substantive examination
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EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20180619

Assignee: Chongqing Changan New Energy Automotive Technology Co., Ltd.

Assignor: Chongqing Changan Automobile Co., Ltd.|Chongqing Chang'an New Energy Automobile Co., Ltd.

Contract record no.: 2018500000022

Denomination of invention: Protection circuit for preventing reverse connection of high-side driving power supply and vehicle control unit

License type: Exclusive License

Record date: 20181130

Application publication date: 20180619

Assignee: Chongqing Changan New Energy Automotive Technology Co., Ltd.

Assignor: Chongqing Changan Automobile Co., Ltd.|Chongqing Chang'an New Energy Automobile Co., Ltd.

Contract record no.: 2018500000022

Denomination of invention: Protection circuit for preventing reverse connection of high-side driving power supply and vehicle control unit

License type: Exclusive License

Record date: 20181130

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Address after: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing

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Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing

Applicant before: Chongqing Chang'an Automobile Co., Ltd.

Applicant before: Chongqing Chang'an New Energy Automobile Co., Ltd.

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