CN107294057A - Protection device and method, electric power system - Google Patents
Protection device and method, electric power system Download PDFInfo
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- CN107294057A CN107294057A CN201710704188.1A CN201710704188A CN107294057A CN 107294057 A CN107294057 A CN 107294057A CN 201710704188 A CN201710704188 A CN 201710704188A CN 107294057 A CN107294057 A CN 107294057A
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- 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
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- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
-
- 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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The embodiments of the invention provide a kind of protection device and method, electric power system, belong to electronic transit equipment technical field, wherein, protection device is applied to electric power system.Protection device includes：Detection process module and switch module；Detection process module is connected with power-supply device and switch module respectively, and switch module is connected with load.Voltage signal in detection process module detection electric power system loop, when judging that voltage signal meets preparatory condition, then controlling switch module is off and realizes the protection to load.And after switch module is off, detection process module also judges whether voltage signal meets preparatory condition, if it is not, then controlling switch module is adjusted to conducting state by off-state, so that electric power system automatically restores to normal work.Therefore, the automatic decision by detection process module and control, while realizing to load protection, do not interfere with the normal work of automobile again.
Description
Technical field
The present invention relates to electronic transit equipment technical field, it is in particular to a kind of protection device and method, power supply
System.
Background technology
With the development of science and technology and improve, to reduce the consumption to non-renewable fossil energy, in automotive field,
New-energy automobile based on electric energy is progressively applied.
At present, new-energy automobile fully relies on the power-supply devices of batteries and powered, and the security of power-supply device is particularly weighed
Will, fuse or air switch are exactly to carry out overcurrent protection or a kind of measure of short-circuit protection to power-supply device.Work as power supply
When equipment exceeds current limit to load supplying, blowout or air switch disconnect, so as to block to load supplying, play
Protective effect.The loop between power-supply device and load is caused to disconnect after blowout, so as to recover normal work to automobile
Cause to hinder.The loop between power-supply device and load is also caused to disconnect in addition, air switch disconnects, but due to air switch not
It can automatically reset, also recover normal work to automobile and cause to hinder.
Therefore, how the protection to load can be realized, the normal work that automobile is not interfered with again is current industry
Boundary's a great problem.
The content of the invention
In view of this, it is an object of the invention to provide a kind of protection device and method, electric power system, on being effectively improved
State defect.
The technical scheme that embodiments of the invention solve above-mentioned technical problem is as follows：
In a first aspect, the embodiments of the invention provide a kind of protection device, it is characterised in that applied to electric power system, institute
Stating electric power system includes：Power-supply device and load, the power-supply device are connected with the load, and the protection device includes：Inspection
Survey processing module and switch module.The detection process module is connected with the power-supply device and the switch module respectively, institute
Switch module is stated to be connected with the load.The detection process module, for obtaining the current supply circuit in the electric power system
Voltage signal, judges whether the voltage signal meets preparatory condition, if so, control the switch module to be off,
Judge whether the voltage signal meets the preparatory condition afterwards, if it is not, controlling the switch module in the conduction state.
Second aspect, the embodiments of the invention provide a kind of guard method, at the detection applied to described protection device
Manage module.Methods described includes：Obtain the voltage signal of the current supply circuit in electric power system；Judge whether the voltage signal is full
Sufficient preparatory condition, if so, controlling switch module is off, judges whether the voltage signal meets described default afterwards
Condition, if it is not, controlling the switch module in the conduction state.
The third aspect, the embodiments of the invention provide a kind of electric power system, the electric power system includes：It is power-supply device, negative
Carry and described protection device, the power-supply device is connected with described load, the protection device respectively with the power-supply device
With the load connection.
The beneficial effect of the embodiment of the present invention is：
Voltage signal in electric power system loop is detected by detection process module, bar is preset when judging that voltage signal is met
During part, then controlling switch module is off and realizes the protection to load.And it is off it in switch module
Afterwards, detection process module also judges whether voltage signal meets preparatory condition, if it is not, then controlling switch module is adjusted by off-state
It is whole to conducting state so that electric power system automatically restores to normal work.Therefore, by the automatic decision of detection process module and
Control, while realizing to load protection, does not interfere with the normal work of automobile again.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that or being understood by implementing the embodiment of the present invention.The purpose of the present invention and other advantages can be by being write
Specifically noted structure is realized and obtained in specification, claims and accompanying drawing.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.By shown in accompanying drawing, above and other purpose of the invention, feature and advantage will become apparent from.In whole
Identical reference indicates identical part in accompanying drawing.Deliberately accompanying drawing, emphasis are not drawn by actual size equal proportion scaling
It is the purport for showing the present invention.
Fig. 1 shows a kind of structured flowchart for protection system that first embodiment of the invention is provided；
Fig. 2 shows a kind of first structure block diagram for protection device that second embodiment of the invention is provided；
Fig. 3 shows a kind of the second structured flowchart of protection device that second embodiment of the invention is provided；
Fig. 4 shows the circuit diagram of detection process module in a kind of protection device that second embodiment of the invention is provided；
Fig. 5 shows the circuit diagram of switch module in a kind of protection device that second embodiment of the invention is provided；
Fig. 6 shows a kind of flow chart for guard method that third embodiment of the invention is provided.
Icon：10- electric power systems；11- power-supply devices；12- is loaded；100- protection devices；110- detection process modules；
111- detection units；112- comparing units；1121- first comparator circuits；The comparator circuits of 1122- second；113- gates
Unit；120- switch modules；121- first switch units；122- second switch units；123- ends control unit.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.
In the description of the invention, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, without being understood that
To indicate or implying relative importance.And in the description of the invention, in addition it is also necessary to explanation, unless otherwise clear and definite regulation and
Limit, term " connection ", " coupling " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or
It is integrally connected；Can be mechanical connection or electrical connection；Can be joined directly together, can also be by between intermediary
Connect connected, can be the connection of two element internals.For the ordinary skill in the art, it can be understood with concrete condition
The concrete meaning of above-mentioned term in the present invention.
First embodiment
Referring to Fig. 1, first embodiment of the invention provides a kind of electric power system 10, the electric power system 10 includes：Power supply
Equipment 11, load 12 and protection device 100.Wherein, the positive pole of power-supply device 11 is connected with load 12, and protection device 100 is distinguished
It is connected with the negative pole of power-supply device 11 and load 12.
Power-supply device 11 is used to provide electric energy for the normal work of load 12, and power-supply device 11 can be connected with each other to be multiple
Batteries into.Power-supply device 11 is exported to load 12 by connecting load 12 by the electric energy discharged storage, to ensure
The normal work of load 12, or by the electric energy for the acquisition outside input that charges, by power storage.
Load 12 is the part on automobile, for example, genemotor.Load 12 can obtain the output electric energy of power-supply device 11
And normal work is carried out, for example, genemotor obtains electric energy and rotated, to drive running car.
Protection device 100 is used to detect and obtain the voltage signal in the current supply circuit of electric power system 10, and judges that voltage is believed
Number whether meet preparatory condition.If so, then illustrate excessively stream or overvoltage in the current supply circuit of electric power system 10, and then protection device
100 disconnect the current supply circuit of electric power system 10, so that load 12 and power-supply device 11 are protected.And returning in electric power system 10
After road disconnects, continuation judges whether voltage signal falls back to and meets preparatory condition, if it is not, then illustrating that the power supply of electric power system 10 is returned
No longer excessively stream or overvoltage, and then protection device 100 closes the current supply circuit of electric power system 10 in road, so that electric power system 10 is again
Return to normal work.
Second embodiment
Referring to Fig. 2, second embodiment of the invention provides a kind of protection device 100, protection device 100 is applied to power supply
System, the protection device 100 includes：Detection process module 110 and switch module 120.Wherein, detection process module 110 is distinguished
It is connected with the negative pole and switch module 120 of power-supply device 11, switch module 120 is connected with load 12.
Detection process module 110 is used to detect and obtain the voltage signal in the current supply circuit of electric power system.By comparing
Device judges whether voltage signal meets preparatory condition, if so, triggering exports the first level to switch module 120.Pass through again afterwards
Comparator judges whether voltage signal falls back to and meets preparatory condition, if it is not, triggering exports second electrical level to the switch module
120。
Switch module 120 is used to be off according to the first level of acquisition, so that the power supply of electric power system is returned
Road is in open-circuit condition, so as to protect the load 12 in electric power system and power-supply device 11.And according to the second electrical level of acquisition and
It is in the conduction state, so that the current supply circuit of electric power system is in closure state, so that electric power system returns to normal work.
In the present embodiment, the difference of the first level and second electrical level meets preset standard and is：When the first level is high electricity
Usually, its second electrical level is low level, or when the first level is low level, its second electrical level is high level.Preferably, first
Level is low level, and second electrical level is high level.
Fig. 3 and Fig. 4 are referred to, detection process module 110 includes：Detection unit 111, comparing unit 112 and gate list
Member 113.Wherein, detection unit 111 is connected with power-supply device 11, comparing unit 112 and switch module 120 respectively, gate list
Member 113 is respectively compared unit 112 and switch module 120 is connected.
Detection unit 111 is used to obtaining the voltage signal in the current supply circuit of electric power system, and by voltage signal export to
Comparing unit 112.
Specifically, detection unit 111 is specially the first current sense resistor R1, the first current sense resistor R1 one end is set
There is the connectivity port A1 of the negative pole of connection power-supply device 11, the first current sense resistor R1 other end then connects more single respectively
The connectivity port A2 of member 112 and switch module 120.First current sense resistor R1 is by being connected to the current supply circuit of electric power system
In, the current signal flowed through is converted to voltage signal by the first current sense resistor R1, and the voltage signal is exported to comparing
Unit 112.
As shown in Figure 3 and Figure 4, comparing unit 112 is used to judge whether the voltage signal obtained meets preparatory condition, if
It is that triggering logic gate 113 exports the first level to switch module 120, is off with controlling switch module 120.
It is further continued for judging whether voltage signal is fallen after rise to preparatory condition is met, if it is not, triggering logic gate 113 the second electricity of output afterwards
Put down to switch module 120, adjusted with controlling switch module 120 by cut-off state in the conduction state.
Specifically, comparing unit 112 includes：The comparator circuit 1122 of first comparator circuit 1121 and second, wherein, the
The positive input of the reverse input end of one comparator circuit 1121 and the second comparator circuit 1122 connects with detection unit 111
Connect, the output end of the output end of first comparator circuit 1121 and the second comparator circuit 1122 connects with logic gate 113
Connect.
In the comparator circuit 1122 of first comparator circuit 1121 and second of the present embodiment：
First comparator U1 positive input is connected with first resistor R2 one end and second resistance R3 one end respectively.
The first reference power source outside first resistor R2 other end connection, first reference power source can be 200mV.Second resistance R3
Output end of the other end then with first comparator U1 be connected.First comparator U1 reverse input end is first comparator electricity
The A reverse input ends on road 1121, it is connected with the connectivity port A2 in detection unit 111.First comparator U1 power end connects
The working power of outside is connect, the working power can be 5V.First comparator U1 earth terminal is provided with connection power-supply device 11
The connectivity port A3 of negative pole.First comparator U1 output end is the output end of first comparator circuit 1121, itself and logic
Gate cell 113 is connected.
Second comparator U2 positive input is connected with 3rd resistor R4 one end and the 4th resistance R5 one end respectively.
The 3rd resistor R4 other end is the positive input of the second comparator circuit 1122, itself and the connection in detection unit 111
Port A2 connections.Output end of the 4th resistance R5 other end then with the second comparator U2 is connected.Second comparator U2's is reverse
The second reference power source outside input connection, second reference power source can be -80mV.Second comparator U2 power end connects
The working power of outside is connect, the working power can be 5V.Second comparator U2 earth terminal is provided with connection power-supply device 11
The connectivity port A4 of negative pole.Second comparator U2 output end is the output end of the second comparator circuit 1122, itself and logic
Gate cell 113 is connected.
By the above-mentioned annexation of the comparator circuit 1122 of first comparator circuit 1121 and second, pass through first resistor
The first reference power source outside R2 and second resistance R3 partial pressure, and first comparator U1 connections so that first comparator U1
With first threshold, higher limit and lower limit that the first threshold also has.Wherein, the higher limit of first threshold is 250A,
The higher limit of first threshold is 200A.In addition, passing through 3rd resistor R4 and the 4th resistance R5 partial pressure, and the second comparator
The second reference power source outside U2 connections so that the second comparator U2 has Second Threshold, the upper limit that the Second Threshold also has
Value and lower limit.Wherein, the lower limit of Second Threshold is -100A, and the higher limit of Second Threshold is -80A.It is understood that
Comparing unit 112 judges that it is that the voltage signal in current supply circuit is more than the higher limit of first threshold or is less than to meet preparatory condition
The lower limit of Second Threshold, and comparing unit 112 judges that it is that the voltage signal in current supply circuit is less than to be unsatisfactory for preparatory condition
The lower limit of first threshold or the higher limit more than Second Threshold.
In the present embodiment, first comparator U1 and the second comparator U2 be high level effectively, i.e. first comparator U1 and
Second comparator U2 exports high level in original state.
When the electric discharge output electric energy of power-supply device 11, the sense of current in electric power system loop is flowed to by connectivity port A2 to be connected
Port A1 is met, now, the voltage signal in current supply circuit is more than the lower limit of Second Threshold.In first comparator circuit 1121
First comparator U1 compares the voltage signal and first threshold for getting, and the second ratio in the second comparator circuit 1122
The voltage signal and Second Threshold for getting are compared compared with device U2.And because the voltage signal is more than the lower limit of Second Threshold
Value, then in the electric discharge output electric energy of power-supply device 11, holding high level output lasting the second comparator U2.When the voltage signal
During higher limit no more than in first threshold, then first comparator U1 is not acted, i.e., first comparator circuit 1121 keeps high
Level is exported.When the voltage signal is more than the higher limit in first threshold, then first comparator U1 judges to meet preparatory condition,
That is the triggering of first comparator circuit 1121 output low level exports low electricity to logic gate 113 to trigger logic gate 113
The first flat level, and then controlling switch module 120 is off.And after switch module 120 is off, the
One comparator U1 also compares the voltage signal and first threshold, when the voltage signal is not less than the lower limit in first threshold
When, then first comparator U1 is not acted, i.e., first comparator circuit 1121 still keeps low level output.When the voltage signal is returned
When dropping down onto the lower limit being less than in first threshold, then first comparator U1 judges to be unsatisfactory for preparatory condition, i.e. first comparator electricity
Output high level is recovered to logic gate 113 in road 1121, to trigger the second electrical level that logic gate 113 exports high level,
And then controlling switch module 120 is adjusted to initial conducting state by off-state.
When the charging input electric energy of power-supply device 11, the sense of current in the current supply circuit of electric power system is by connectivity port A1
Connectivity port A2 is flowed to, now, the voltage signal in current supply circuit is less than the lower limit of first threshold.Second comparator circuit
The second comparator U2 in 1122 compares the voltage signal and Second Threshold for getting, and in first comparator circuit 1121
First comparator U1 also the voltage signal and first threshold for getting are compared.And because the voltage signal is less than the first threshold
The lower limit of value, then in the charging input electric energy of power-supply device 11, holding high level output lasting first comparator U1.When this
When voltage signal is not less than the lower limit in Second Threshold, then the second comparator U2 is not acted, i.e. the second comparator circuit
1122 keep high level output.When the voltage signal is less than the lower limit in Second Threshold, then the second comparator U2 presets bar
Part, i.e. the second comparator circuit 1122 triggering output low level are exported to logic gate 113 with triggering logic gate 113
Low level first level, and then controlling switch module 120 is off.And after the cut-off of switch module 120, the second ratio
Also the voltage signal and Second Threshold are compared compared with device U2, when the voltage signal is not more than the higher limit in Second Threshold, then
Second comparator U2 is not acted, i.e., the second comparator circuit 1122 still keeps low level output.When the voltage signal fall after rise to
During more than higher limit in Second Threshold, then the second comparator U2 judges to be unsatisfactory for default regulation, i.e. the second comparator circuit
1122 recover output high level to logic gate 113, to trigger the second electrical level that logic gate 113 exports high level, enter
And controlling switch module 120 is adjusted to initial conducting state by off-state.
It is understood that the lower limit that the lower limit in first threshold is less than in its higher limit, and Second Threshold is less than
Its higher limit so that when lower limit of the voltage in current supply circuit less than first threshold, or higher than the higher limit in Second Threshold
When current supply circuit just return to closure state, effectively ensured load 12 safety.
As shown in Figure 3 and Figure 4, logic gate 113 can be with logic gates U3, wherein, with logic gates U3
First input end be connected with the output end of first comparator circuit 1121, with logic gates U3 the second input and second
The output end connection of comparator circuit 1122, is then connected with logic gates U3 output end with switch module 120.
When the comparator circuit 1122 of first comparator circuit 1121 and second exports high level, logic gate 113
The second electrical level of corresponding output high level is to switch module 120, so that switch module 120 is in the conduction state.If when first
When comparator circuit 1121 exports low level or the second comparator circuit 1122 output low level, logic gate 113 is then corresponding
Low level first level of output to switch module 120 so that switch module 120 is in cut-off state.
It is understood that a kind of preferred embodiment that logic gate 113 is with door is the present invention in the present embodiment.Its
Also other logic gates can be used, for example, when first comparator U1 and the second comparator U2 is that equal low level is effective, logic
Gate cell 113 can be then OR gate, just not elaborate herein.
Fig. 3 and Fig. 5 are referred to, switch module 120 includes：First switch unit 121, second switch unit 122 and cut-off
Control unit 123.Wherein, first switch unit 121 is connected with logic gate 113 and second switch unit 122 respectively, and second
Switch element 122 12 be connected with detection unit 111 and load respectively, end control unit 123 respectively with first switch unit
121st, second switch unit 122 and detection unit 111 are connected.
First switch unit 121 is used for when obtaining the first level, and first switch unit 121 is off, by the
One level is loaded onto second switch unit 122, to control second switch unit 122 to be also at off-state.
In the first switch unit 121 of the present embodiment：
The connectivity port B1 of output end of the first divider resistance R6 one end provided with connection logic gate 113, first point
Grid of the piezoresistance R6 other end and the second divider resistance R7 one end with the first FET MOS1 is connected.Second partial pressure
The resistance R7 other end and the first FET MOS1 source electrode connection, and provided with the connectivity port A2's of detection unit 111
Connectivity port B2.First FET MOS1 drain electrode is connected with the 3rd divider resistance R8 one end, the 3rd divider resistance R8's
Grid of the other end and the 4th divider resistance the R9 one end with the second FET MOS2 is connected, and the 4th divider resistance R9's is another
The source electrode of one end and the second FET is all connected with the working power of outside, and the working power can be 5V.Second FET
MOS2 drain electrode is then connected with second switch unit 122.
When first switch unit 121 is off and when getting the second electrical level of high level, first switch unit
The first FET MOS1 and the second FET MOS2 in 121 is in the conduction state successively, and second electrical level is loaded onto
Second switch unit 122, to control second switch unit 122 to be also at conducting state.When first switch unit 121 is on
State and when getting low level second electrical level, the first FET MOS1 and second effect in first switch unit 121
Should pipe MOS2 be off successively, second electrical level is loaded onto second switch unit 122, to control second switch unit
122 are also at off-state.
When second switch unit 122 is used to get the first level, second switch unit 122 is off, or is obtained
When getting second electrical level, second switch unit 122 is in the conduction state.In the present embodiment, to improve second switch unit 122
FET in load capacity, second switch unit 122 is at least one, it is preferable that the field effect in second switch unit 122
Answer Guan Kewei 3.
In the second switch unit 122 of the present embodiment：
5th divider resistance R10 one end is connected with first switch unit 121, the 5th divider resistance R10 other end and
Cathode terminal of the 6th divider resistance R11 one end with the first commutation diode D1 is connected, the first commutation diode D1 negative electrode
The grid of end respectively with the 3rd FET MOS3 grid, the 4th FET MOS4 grid and the 5th FET MOS5
Connection.3rd FET MOS3 leakage and the 4th FET MOS4 drain electrode and the 5th FET MOS5 drain electrode connect
Connect, and provided with the connectivity port B3 of connection load 12.The other end of 6th divider resistance 11, the 3rd FET MOS3 source
The source electrode of pole, the 4th FET MOS4 source electrode with the 5th FET MOS5 is connected, and provided with connecting detection unit 111
Connectivity port A2 connectivity port B4.In addition, the second commutation diode D2 anode tap and the 3rd FET MOS3 source
Pole is connected, and the second commutation diode D2 cathode terminal is connected with the 3rd FET MOS3 drain electrode.3rd commutation diode D3
Anode tap be connected with the 4th FET MOS4 source electrode, the 5th commutation diode D cathode terminal and the 4th FET
MOS4 drain electrode connection.4th commutation diode D4 anode tap is connected with the 5th FET MOS5 source electrode, the 4th rectification
Diode D4 cathode terminal is connected with the 5th FET MOS5 drain electrode.
When second switch unit 122 is in cut-off state and gets the second electrical level of high level, second switch unit
The 3rd FET MOS3, the 4th FET MOS4 and the 5th FET MOS5 in 122 are in conducting state, so that
So that the current supply circuit closure of electric power system.Low level first is got when second switch unit 122 is in the conduction state
During level, the 3rd FET MOS3, the 4th FET MOS4 and the 5th FET MOS5 in second switch unit 122
Quickly adjusted by the way that energy is discharged to cut-off control unit 123 by conducting state to off-state, so that for
The current supply circuit of electric system quickly disconnects.
Ending control unit 123 is used for when obtaining the first level, and cut-off control unit 123 is according to second switch unit
122 release can and it is in the conduction state so that second switch unit 122 is quickly adjusted to off-state by conducting state.Or
When obtaining second electrical level, cut-off control unit 123 is off.
In the cut-off control unit 123 of the present embodiment：
First diode D5 anode and the second diode D6 anode are connected with first switch unit 121, and the one or two
Emitter stage of the pole pipe D5 negative electrode respectively with the triode Q1 of second switch unit 122 and first is connected, the second diode D6 the moon
Pole is connected with the 5th resistance R12 one end and the first triode Q1 base stage respectively, the 5th resistance R12 other end and the one or three
Pole pipe Q1 colelctor electrode is connected with connectivity port B4.
When first switch unit 121 is off changing into conducting state, and when exporting the second electrical level of high level,
The base stage for ending the first triode Q1 in control unit 123 is identical with current collection electrode potential, and the first triode Q1 is off,
Enter and be controlled without the action to second switch unit 122.Disconnection is changed into when first switch unit 121 is in the conduction state
State, and when exporting low level first level.The 3rd FET MOS3 in second switch unit 122, the 4th field-effect
Pipe MOS4 and the 5th FET MOS5 are by the way that energy is discharged to cut-off control unit 123 so that cut-off control unit 123
In the first triode Q1 saturation conductions, and then the first triode Q1 drags down rapidly the voltage of second switch unit 122.Second opens
The energy closed in unit 122 has quickly been discharged into cut-off control unit 123, and then causes in second switch unit 122 the
Three FET MOS3, the 4th FET MOS4 and the 5th FET MOS5 quickly change into disconnection by conducting state
State.Therefore, cut-off control unit 123 can effectively reduce second switch unit 122 and go off state by conducting state
Duration is acted, in case load 12 is in over-current state or overvoltage condition for a long time.
3rd embodiment
Referring to Fig. 6, third embodiment of the invention provides a kind of guard method, applied to protection device.The protection side
Method includes：Step S100 and step S200.
Step S100：Obtain the voltage signal of the current supply circuit in electric power system.
Step S200：Judge whether the voltage signal meets preparatory condition, if so, controlling switch module, which is in, disconnects shape
State, judges whether the voltage signal meets the preparatory condition afterwards, if it is not, controlling the switch module to be on shape
State..
It is apparent to those skilled in the art that, for convenience and simplicity of description, the method for foregoing description
Specific work process, may be referred to the corresponding process in aforementioned means, will not be repeated here.
In summary：The embodiments of the invention provide a kind of protection device and method, electric power system, wherein, protection device
Applied to electric power system.Electric power system includes：Power-supply device and load, power-supply device are connected with load, and protection device includes：Inspection
Survey processing module and switch module；Detection process module is connected with power-supply device and switch module respectively, switch module and load
Connection.
Voltage signal in electric power system loop is detected by detection process module, bar is preset when judging that voltage signal is met
During part, then controlling switch module is off and realizes the protection to load.And it is off it in switch module
Afterwards, detection process module also judges whether voltage signal meets preparatory condition, if it is not, then controlling switch module is adjusted by off-state
It is whole to conducting state so that electric power system automatically restores to normal work.Therefore, by the automatic decision of detection process module and
Control, while realizing to load protection, does not interfere with the normal work of automobile again.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of protection device, it is characterised in that applied to electric power system, the electric power system includes：Power-supply device and load,
The power-supply device is connected with the load, and the protection device includes：Detection process module and switch module；At the detection
Reason module is connected with the power-supply device and the switch module respectively, and the switch module is connected with the load；
The detection process module, the voltage signal for obtaining the current supply circuit in the electric power system, judges the voltage
Whether signal meets preparatory condition, if so, controlling the switch module to be off, judges that the voltage signal is afterwards
It is no to meet the preparatory condition, if it is not, controlling the switch module in the conduction state.
2. protection device according to claim 1, it is characterised in that the detection process module includes：Detection unit, ratio
Compared with unit and logic gate；The detection unit respectively with the power-supply device, the comparing unit and the switch module
Connection, the comparing unit is connected with the power-supply device, and the logic gate is respectively with the comparing unit and described opening
Close module connection；
The detection unit, for obtaining the voltage signal in the current supply circuit, and by the voltage signal export to
The comparing unit；
The comparing unit, for judging whether the voltage signal meets the preparatory condition, if so, triggering the gate
Unit exports the first level to the switch module, and to control the switch module to be in the off-state, institute is judged afterwards
State whether voltage signal meets the preparatory condition, if it is not, triggering the logic gate exports second electrical level to the switch
Module, to control the switch module to be in the conducting state, wherein, the difference of first level and the second electrical level
Meet preset standard.
3. protection device according to claim 2, it is characterised in that comparing unit includes：First comparator circuit and
The positive input of two comparator circuits, the reverse input end of the first comparator circuit and second comparator circuit is equal
Be connected with the detection unit, the output end of the output end of the first comparator circuit and second comparator circuit with
The logic gate connection；
The first comparator circuit presets have first threshold, and second comparator circuit is preset with Second Threshold, described
One threshold value is more than the Second Threshold；
When the voltage signal is more than the first threshold, the first comparator circuit judges to meet the preparatory condition,
Trigger the logic gate and export first level, to control the switch module to be in the off-state, work as afterwards
When the voltage signal is less than the first threshold, the first comparator circuit judges to be unsatisfactory for the preparatory condition, triggers
The logic gate exports the second electrical level, to control the switch module to be in the conducting state；
When the voltage signal is less than the Second Threshold, second comparator circuit judges to meet the preparatory condition,
Trigger the logic gate and export first level, to control the switch module to be in the off-state, work as afterwards
When the voltage signal is more than the Second Threshold, second comparator circuit judges to be unsatisfactory for the preparatory condition, triggers
The logic gate exports the second electrical level, to control the switch module to be in the conducting state.
4. protection device according to claim 2, it is characterised in that the switch module includes：First switch unit and
Second switch unit, the first switch unit is connected with the logic gate and the second switch unit respectively, described
Second switch unit is connected with the detection unit and the load respectively；
The first switch unit, when obtaining first level, the first switch unit is in the off-state, will
First level is loaded onto the second switch unit, to control the second switch unit to be in the off-state；Or
When obtaining the second electrical level, the second switch unit is in the conducting state, and the second electrical level is loaded onto
The second switch unit, to control the second switch unit to be in the conducting state.
5. protection device according to claim 4, it is characterised in that the first switch unit includes：First partial pressure electricity
Resistance, the second divider resistance, the 3rd divider resistance, the 4th divider resistance, the first FET and the second FET, described first
One end of divider resistance is connected with the logic gate, the other end of first divider resistance and second divider resistance
Grid of the one end with first FET be connected, the other end of second divider resistance and first field-effect
The source electrode of pipe is connected with the detection unit, and the drain electrode of first FET connects with one end of the 3rd divider resistance
Connect, the grid of the other end of the 3rd divider resistance and one end of the 4th divider resistance with second FET
Connection, the other end of the 4th divider resistance is connected with the source electrode of second FET, second FET
Drain electrode is connected with the second switch unit.
6. protection device according to claim 4, it is characterised in that the second switch unit includes：5th partial pressure electricity
Resistance, the 6th divider resistance and the 3rd FET, one end of the 5th divider resistance are connected with the first switch unit, institute
Grid of the one end with the 3rd FET of the other end and the 6th divider resistance of stating the 5th divider resistance is connected,
The drain electrode of 3rd FET is connected with the load, the other end of the 6th divider resistance and the 3rd field-effect
The source electrode of pipe is connected with the detection unit.
7. protection device according to claim 4, it is characterised in that the switch module also includes：End control unit,
The cut-off control unit is connected with the first switch unit, the second switch unit and the detection unit respectively；
The cut-off control unit, when obtaining first level, the cut-off control unit is according to the second switch list
Releasing for member can be in the conducting state, to control the second switch unit to be in the off-state, or described when obtaining
During second electrical level, the cut-off control unit is in the off-state.
8. protection device according to claim 7, it is characterised in that the cut-off control unit includes：First diode,
The anode of second diode and the first triode, the anode of first diode and second diode is with described first
Switch element is connected, the transmitting of the negative electrode of first diode respectively with the second switch unit and first triode
Pole is connected, and the negative electrode of second diode is connected with the base stage of first triode, the colelctor electrode of first triode
It is connected with the detection unit.
9. a kind of guard method, it is characterised in that at the detection applied to the protection device described in claim 1-8 any one
Module is managed, methods described includes：
Obtain the voltage signal of the current supply circuit in electric power system；
Judge whether the voltage signal meets preparatory condition, if so, controlling switch module is off, institute is judged afterwards
State whether voltage signal meets the preparatory condition, if it is not, controlling the switch module in the conduction state.
10. a kind of electric power system, it is characterised in that the electric power system includes：Power-supply device, load and claim 1-8 appoint
Protection device described in meaning one, the power-supply device is connected with the load, and the protection device is set with the power supply respectively
Standby and described load connection.
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| CN201710704188.1A CN107294057B (en) | 2017-08-16 | 2017-08-16 | Protective device and method, power supply system |
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| CN201710704188.1A CN107294057B (en) | 2017-08-16 | 2017-08-16 | Protective device and method, power supply system |
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| CN108092652A (en) * | 2018-02-13 | 2018-05-29 | 铜仁学院 | The control method of a kind of solid-state relay and solid-state relay, system |
| CN108599108A (en) * | 2018-04-30 | 2018-09-28 | 上海晶丰明源半导体股份有限公司 | Protect circuit, drive system, chip and circuit protection method, driving method |
| CN111157877A (en) * | 2019-12-31 | 2020-05-15 | 西安翔腾微电子科技有限公司 | Off-state load open circuit detection circuit |
| CN111565490A (en) * | 2019-10-30 | 2020-08-21 | 华域视觉科技(上海)有限公司 | Starting method, system, medium and equipment of boost chip for automobile LED signal lamp |
| CN112186819A (en) * | 2019-07-02 | 2021-01-05 | 广州哨马智能装备科技有限公司 | Inspection robot, power supply system protection device and control method thereof |
| CN113433380A (en) * | 2021-06-24 | 2021-09-24 | 深圳市白光电子科技有限公司 | Voltage sampling control method and device |
| CN113552474A (en) * | 2021-07-29 | 2021-10-26 | 上海壁仞智能科技有限公司 | Compatible power interface detection circuit and electronic equipment |
| CN117516301A (en) * | 2023-12-29 | 2024-02-06 | 深圳奥简科技有限公司 | Control data processing method and circuit for preventing misoperation |
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| CN113433380A (en) * | 2021-06-24 | 2021-09-24 | 深圳市白光电子科技有限公司 | Voltage sampling control method and device |
| CN113552474A (en) * | 2021-07-29 | 2021-10-26 | 上海壁仞智能科技有限公司 | Compatible power interface detection circuit and electronic equipment |
| CN117516301A (en) * | 2023-12-29 | 2024-02-06 | 深圳奥简科技有限公司 | Control data processing method and circuit for preventing misoperation |
| CN117516301B (en) * | 2023-12-29 | 2024-04-16 | 深圳奥简科技有限公司 | Control data processing method and circuit for preventing misoperation |
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