CN106655083A - Wide voltage power supply protection device and method for electric car vehicle equipment - Google Patents
Wide voltage power supply protection device and method for electric car vehicle equipment Download PDFInfo
- Publication number
- CN106655083A CN106655083A CN201610831668.XA CN201610831668A CN106655083A CN 106655083 A CN106655083 A CN 106655083A CN 201610831668 A CN201610831668 A CN 201610831668A CN 106655083 A CN106655083 A CN 106655083A
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- CN
- China
- Prior art keywords
- voltage
- input
- power supply
- triode
- high withstand
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
Abstract
The invention discloses a wide voltage power supply protection device and method for electric car vehicle equipment. The method comprises steps that firstly, a high voltage resistance triode is taken as a power supply switch tube to improve transient high voltage resistance capability of components, and a problem that the components can be easily burned by transient high voltages in the prior art can be solved; secondly, a voltage sampling circuit, a central controller and the high voltage resistance triode are employed to form a sampling control circuit, a problem that a vehicle equipment power supply even in a relatively low voltage is continuously consumed in the prior art is solved, intelligent control on the vehicle equipment power supply is realized, unnecessary consumption of electric car electric energy can be effectively avoided, electric car start energy and other necessary electricity are guaranteed to realize priority supply, and user experience and safety of an electric car are improved; and thirdly, the voltage sampling circuit and the control circuit are employed to realize control for closing a triode switch when a transient voltage is overhigh, and the components are further protected from being burned by the transient high voltages.
Description
Technical field
The present invention relates to mobile unit power supply field, more particularly to a kind of Width funtion power protection dress of mobile unit
Put and method.
Background technology
Electric motor car is with battery power, so its voltage is often very high, electric motor car in the market has battery to have 48V,
60V, 75V, 90V etc., standard and disunity.Therefore need to be equipped with the DC-DC power source circuit with Width funtion input.
In prior art, the Width funtion apparatus for protecting power supply of electric-vehicle-mounted equipment is primarily present following two problems：
1. traditional solution of power protection, typically uses a diode and a TVS pipe（As shown in Figure 1）, this
Sample can only solve low-voltage（Such as 12V）The problem of power supply disturbance, but in high voltage（Such as 24V）In system, it is impossible to meet and require.It is special
It is not P5a pulses the harshest（According to GB/T21437.2-2008《Road vehicle by conduct and couple cause electricity harassing and wrecking.
Part II：Electric transient along power line is conducted》（Equivalent ISO7637）Define the transient state vulnerability to jamming of car electrics；P1,P2a,
The test waveform and method of testing of 6 kinds of situations such as P2b, P3a, P3b, P5a）, easily burn out TVS pipe and DC-DC circuit.For example,
In electric-vehicle-mounted device power supply (DPS), the oscillogram of P5a is as shown in Fig. 2 simulation is that electric generator of vehicle runs in high rotating speed
When, in the case that storage battery is opened a way suddenly or is damaged, the electricity harassing and wrecking of generation.As seen from Figure 2, it is the characteristics of electricity harassing and wrecking：Voltage
Peak value Us is high（Deviate normal voltage value UA7.25 times）, Td length of holding time（Far beyond general surge voltage）；Higher
In electrical voltage system or client is self-defining when requiring, peak value is up to higher value, is easy to burn out circuit components and circuit
System.
2. in electric-vehicle-mounted device power supply (DPS), still provide when such as electric vehicle power sources voltage is relatively low mobile unit power after
It is continuous to consume electric energy, it is likely that to affect the energy or the energy needed for other necessary operations needed for vehicle startup next time.Light then impact is used
Family driving experience, it is heavy then exist potential safety hazard be easily caused accident generation.
The content of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide one kind can effectively anti-Width funtion power supply transient state do
Disturb, and mobile unit power supply, the mobile unit apparatus for protecting power supply of reduction power consumption and side can be closed in line under-voltage state
Method.
The technical solution adopted in the present invention is：
A kind of Width funtion apparatus for protecting power supply of electric-vehicle-mounted equipment, including Width funtion input interface, voltage sample circuit, height
Pressure triode, electricity harassing and wrecking sample circuit, drive control circuit, central processing unit and DC-DC circuit, the Width funtion input connects
The output end of mouth is connected with the input of high withstand voltage triode, and the output end of the high withstand voltage triode is defeated with DC-DC circuit
Enter end connection, the output end of the central processing unit is connected with the input of drive control circuit, and the drive control circuit is used
In the on off state of control high withstand voltage triode；The voltage sample circuit is used to gather the voltage of Width funtion input interface output
And export to central controller, when Width funtion input interface collection voltages are less than brownout threshold, the central controller passes through
Drive control circuit high withstand voltage triode ends；The electricity harassing and wrecking sample circuit is input to high withstand voltage triode for collection
Voltage and export to drive control circuit, when the voltage for being input to high withstand voltage triode is more than overvoltage threshold, the driving
Control circuit control high withstand voltage triode cut-off.
Preferably, the central processing unit is also associated with memory.
Preferably, it was also associated between the output end of the Width funtion input interface and the input of high withstand voltage triode
Overcurrent protection module.
Preferably, the overcurrent protection module is thermistor.
Preferably, it is also associated between the output end of the Width funtion input interface and the input of overcurrent protection module
Reverse connecting protection module.
Preferably, the reverse connecting protection module is the output end and overcurrent protection that forward direction is connected to Width funtion input interface
Diode between the input of module.
A kind of Width funtion power protection method of electric-vehicle-mounted equipment, it is under-voltage that it is applied to electric-vehicle-mounted device power supply (DPS)
Protection device, methods described includes step：S1, gathers the voltage of Width funtion input interface output and exports to central controller,
When Width funtion input interface collection voltages are less than brownout threshold, the central controller is resistance to by drive control circuit height
Pressure triode cut-off；S2, collection is input to the voltage of high withstand voltage triode and exports to drive control circuit, high resistance to when being input to
When the voltage of pressure triode is more than overvoltage threshold, the drive control circuit high withstand voltage triode cut-off.
Preferably, step S1 is specially：The normal input of central processing unit automatic identification voltage sample circuit collection
Voltage simultaneously sets corresponding brownout threshold.
Preferably, overvoltage threshold described in step S2 is the 10%-15% more than normal working voltage.
The invention has the beneficial effects as follows：
One aspect of the present invention is by high electric as the anti-transient state that power supply switch tube improves components and parts itself using high withstand voltage triode
Pressure energy power, overcomes the problem that components and parts are easily burned because of transient high voltages in prior art；Second aspect is by adopting
The sampling control circuit of voltage sampling circuit, central controller and high withstand voltage triode composition, overcomes vehicle-mounted in prior art
Device power supply (DPS) continues to consume the problem of power supply when voltage is relatively low, realizes the Based Intelligent Control of mobile unit power supply, effectively keeps away
Exempt from the unnecessary consumption of vehicle electric energy, it is preferential to ensure that electric motor car starts the energy and the supply of other necessary electricity consumptions, improve
The security of Consumer's Experience and electric motor car；The third aspect using electricity harassing and wrecking sample circuit and control circuit by being controlled in transient state electricity
Triode switch is closed when pressing through high, further protects components and parts not because transient high voltages are sustained damage.
In addition, the present invention also realizes the Width funtion of mobile unit power supply by arranging Width funtion input and DC-DC circuit
Input；Can be used to store the control threshold value of different control sources by memory, realize the Based Intelligent Control that Width funtion is input into；Using
Overcurrent protection module protection circuit when electric current is excessive；Prevent the reversed circuit for causing of power supply from damaging using reverse connecting protection module
Evil.
Description of the drawings
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is the DC-DC power source protection circuit structural representation of traditional Width funtion input；
Fig. 2 is P5a timing charts；
Fig. 3 is the circuit structure block diagram of an embodiment of the present invention.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.
A kind of Width funtion apparatus for protecting power supply of electric-vehicle-mounted equipment, including Width funtion input interface, voltage sampling electricity
Road, high withstand voltage triode, electricity harassing and wrecking sample circuit, drive control circuit, central processing unit and DC-DC circuit, the Width funtion
The output end of input interface is connected with the input of high withstand voltage triode, and the output end of the high withstand voltage triode is electric with DC-DC
The input connection on road, the output end of the central processing unit is connected with the input of drive control circuit, the drive control
Circuit is used to control the on off state of high withstand voltage triode；The voltage sample circuit is used to gather the output of Width funtion input interface
Voltage and export to central controller, when Width funtion input interface collection voltages are less than brownout threshold, central authorities' control
Device is ended by drive control circuit high withstand voltage triode；The electricity harassing and wrecking sample circuit is input to high withstand voltage for collection
The voltage of triode is simultaneously exported to drive control circuit, when the voltage for being input to high withstand voltage triode is more than overvoltage threshold, institute
State the cut-off of drive control circuit high withstand voltage triode.One aspect of the present invention by sample input voltage, when this voltage it is little
In brownout threshold（If normal voltage is 12V, 9V can be set for brownout threshold）When, start close high withstand voltage triode immediately, from
Dynamic closing controls power supply, forbids consuming electric energy again.After sampling voltage recovers normal, triode recovers immediately conducting, and circuit is in
Normal work.On the other hand, the present invention does switching tube using high withstand voltage triode, by the electric disturbance voltage of sampling, when this electricity
Pressure exceeds overvoltage threshold（Such as larger than normal working voltage 10%-15%）When, start close high withstand voltage triode immediately, make below
Device is protected.After sampling voltage recovers normal, triode recovers immediately conducting, and circuit is in normal work.
In the present embodiment, the Width funtion（Such as 12V-90V DC voltages）Input interface, the high withstand voltage triode it is defeated
Go out end and be also associated with DC-DC circuit, DC-DC circuit output 5V DC voltages.The central processing unit is also associated with memory.It is real
In the application of border, the corresponding relation of can be stored with memory each voltage and brownout threshold（When such as input voltage is 12V, can set
Brownout threshold is put for 9V；If input voltage is 16V, brownout threshold can be set for 12V etc.）.Central processing unit is in normal work
When automatic identification voltage be belonging to any electrical voltage system, and configure corresponding control parameter（Brownout threshold）.Work as input voltage
During less than brownout threshold, the energy for needed for protecting storage battery and vehicle to start next time, with regard to automatic cut-off high withstand voltage triode closing
Controlled power supply, forbids consuming electric energy again.Realize the function that adaptive voltage Protection parameters are recognized and controlled.
When the present embodiment works, control circuit can electricity consumption harassing and wrecking sample circuit collection voltage and normal working voltage ratio
Compared with when sampling voltage is more than preset value（Such as larger than normal working voltage 10%-15%）When, with regard to starting protection function, make high withstand voltage
Triode ends.This function without central processing unit, to obtain the most fast response time.So can effectively prevent electric harassing and wrecking
P2（P2a, P2b vehicle ignition switch disconnects the electricity for causing and harasses, up to 50 volts, 50 microseconds）, P3b（Switch for vehicle process center line
The electricity harassing and wrecking that beam distributed inductance is produced, up to 200 volts, 10 milliseconds）, P5（When electric generator of vehicle runs up, storage battery disconnects or damages
The bad electricity harassing and wrecking for causing, up to 174 volts, 400 milliseconds）Infringement to circuit.
In the present embodiment, it was also associated between the output end of Width funtion input interface and the input of high withstand voltage triode
Overcurrent protection module.Overcurrent protection module is a resettable fuse, is substantially a thermistor, and principle is to work as electric current
During overrate, resistance, final disconnecting circuit protection circuit can be increased because of heating.It has small volume, can recover, action
It is sensitive, the characteristics of fast reaction.
In the present embodiment, it is also associated between the output end of Width funtion input interface and the input of overcurrent protection module
Reverse connecting protection module.Reverse connecting protection module is the output end and overcurrent protection module that forward direction is connected to Width funtion input interface
Diode between input.The function of anti-reverse protection diode and effect are：When preventing wiring, reverse power connection；Eliminate electricity
Harassing and wrecking P1 (the electricity harassing and wrecking that vehicle inductive load is produced when disconnecting, up to -600 volts, 1 millisecond), P3a（Switch for vehicle process center line
The electricity harassing and wrecking that beam distribution capacity is produced, up to -200 volts, 10 milliseconds）.
A kind of Width funtion power protection method of electric-vehicle-mounted equipment, it is under-voltage that it is applied to electric-vehicle-mounted device power supply (DPS)
Protection device, methods described includes step：S1, gathers the voltage of Width funtion input interface output and exports to central controller,
When Width funtion input interface collection voltages are less than brownout threshold, the central controller is resistance to by drive control circuit height
Pressure triode cut-off；S2, collection is input to the voltage of high withstand voltage triode and exports to drive control circuit, high resistance to when being input to
When the voltage of pressure triode is more than overvoltage threshold, the drive control circuit high withstand voltage triode cut-off.
Preferably, step S1 is specially：The normal input of central processing unit automatic identification voltage sample circuit collection
Voltage simultaneously sets corresponding brownout threshold.
Preferably, overvoltage threshold described in step S2 is the 10%-15% more than normal working voltage.
One aspect of the present invention improves the anti-transient state of components and parts itself as power supply switch tube by adopting high withstand voltage triode
High voltage capability, overcomes the problem that components and parts are easily burned because of transient high voltages in prior art；Second aspect passes through
The sampling control circuit constituted using voltage sampling circuit, central controller and high withstand voltage triode, in overcoming prior art
Mobile unit power supply continues to consume the problem of power supply when voltage is relatively low, realizes the Based Intelligent Control of mobile unit power supply, has
Effect avoids the unnecessary consumption of vehicle electric energy, preferential to ensure that electric motor car starts the energy and the supply of other necessary electricity consumptions, carries
The high security of Consumer's Experience and electric motor car；The third aspect using electricity harassing and wrecking sample circuit and control circuit by being controlled in wink
Triode switch is closed during state overtension, further protects components and parts not because transient high voltages are sustained damage.
In addition, the present invention also realizes the Width funtion of mobile unit power supply by arranging Width funtion input and DC-DC circuit
Input；Can be used to store the control threshold value of different control sources by memory, realize the Based Intelligent Control that Width funtion is input into；Using
Overcurrent protection module protection circuit when electric current is excessive；Prevent the reversed circuit for causing of power supply from damaging using reverse connecting protection module
Evil.
It is more than that the preferable enforcement to the present invention is illustrated, but the invention is not limited to the enforcement
Example, those of ordinary skill in the art can also make a variety of equivalent variations on the premise of without prejudice to spirit of the invention or replace
Change, the deformation or replacement of these equivalents are all contained in the application claim limited range.
Claims (9)
1. a kind of Width funtion apparatus for protecting power supply of electric-vehicle-mounted equipment, it is characterised in that including Width funtion input interface, electricity
Pressure sample circuit, high withstand voltage triode, electricity harassing and wrecking sample circuit, drive control circuit, central processing unit and DC-DC circuit, institute
The output end for stating Width funtion input interface is connected with the input of high withstand voltage triode, the output end of the high withstand voltage triode with
The input connection of DC-DC circuit, the output end of the central processing unit is connected with the input of drive control circuit, the drive
Dynamic control circuit is used to control the on off state of high withstand voltage triode；
The voltage sample circuit is used to gather the voltage of Width funtion input interface output and export to central controller, when wide electricity
When pressure input interface collection voltages are less than brownout threshold, the central controller passes through the pole of drive control circuit high withstand voltage three
Pipe ends；
The electricity harassing and wrecking sample circuit is used for collection and is input to the voltage of high withstand voltage triode and exports to drive control circuit, when
When the voltage for being input to high withstand voltage triode is more than overvoltage threshold, the drive control circuit high withstand voltage triode cut-off.
2. electric-vehicle-mounted device power supply (DPS) undervoltage protection device according to claim 1, it is characterised in that the centre
Reason device is also associated with memory.
3. electric-vehicle-mounted device power supply (DPS) undervoltage protection device according to claim 2, it is characterised in that the Width funtion
Overcurrent protection module is also associated between the output end of input interface and the input of high withstand voltage triode.
4. electric-vehicle-mounted device power supply (DPS) undervoltage protection device according to claim 3, it is characterised in that the overcurrent
Protection module is thermistor.
5. the electric-vehicle-mounted device power supply (DPS) undervoltage protection device according to claim 3 or 4, it is characterised in that the width
Reverse connecting protection module is also associated between the output end of control source interface and the input of overcurrent protection module.
6. electric-vehicle-mounted device power supply (DPS) undervoltage protection device according to claim 5, it is characterised in that the reversal connection is protected
Shield module is the diode that forward direction is connected between the input of the output end of Width funtion input interface and overcurrent protection module.
7. a kind of Width funtion power protection method of electric-vehicle-mounted equipment, it is characterised in that it is applied to such as claim 1-6
Electric-vehicle-mounted device power supply (DPS) undervoltage protection device described in any one, methods described includes step：
S1, gathers the voltage of Width funtion input interface output and exports to central controller, when Width funtion input interface collection electricity
When pressure is less than brownout threshold, the central controller is ended by drive control circuit high withstand voltage triode；
S2, collection is input to the voltage of high withstand voltage triode and exports arrives drive control circuit, when being input to high withstand voltage triode
Voltage when being more than overvoltage threshold, drive control circuit high withstand voltage triode cut-off.
8. a kind of Width funtion power protection method of electric-vehicle-mounted equipment according to claim 7, it is characterised in that institute
State step S1 to be specially：
The normal input voltage of central processing unit automatic identification voltage sample circuit collection simultaneously sets corresponding brownout threshold.
9. a kind of Width funtion power protection method of electric-vehicle-mounted equipment according to claim 7, it is characterised in that step
Overvoltage threshold described in rapid S2 is the 10%-15% more than normal working voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610831668.XA CN106655083B (en) | 2016-09-19 | 2016-09-19 | A kind of the Width funtion apparatus for protecting power supply and method of electric-vehicle-mounted equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610831668.XA CN106655083B (en) | 2016-09-19 | 2016-09-19 | A kind of the Width funtion apparatus for protecting power supply and method of electric-vehicle-mounted equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655083A true CN106655083A (en) | 2017-05-10 |
| CN106655083B CN106655083B (en) | 2019-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610831668.XA Active CN106655083B (en) | 2016-09-19 | 2016-09-19 | A kind of the Width funtion apparatus for protecting power supply and method of electric-vehicle-mounted equipment |
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| CN (1) | CN106655083B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923378A (en) * | 2018-08-01 | 2018-11-30 | 广州番禺巨大汽车音响设备有限公司 | A kind of Width funtion apparatus for protecting power supply for stereo set |
| CN109217260A (en) * | 2018-09-27 | 2019-01-15 | 倍登新能源科技（苏州）有限公司 | Overcurrent protector for power tool battery packet |
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| Publication number | Publication date |
|---|---|
| CN106655083B (en) | 2019-06-11 |
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