CN206452111U

CN206452111U - A kind of anti-short-circuit protection of emergency power supply

Info

Publication number: CN206452111U
Application number: CN201720088603.0U
Authority: CN
Inventors: 於铉
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-01-20
Filing date: 2017-01-20
Publication date: 2017-08-29
Anticipated expiration: 2027-01-20

Abstract

The utility model discloses a kind of anti-short-circuit protection of emergency power supply, including：First, second photoelectric coupling circuit, voltage-regulator diode, switching diode, controllable silicon, touch-switch, the first to the 3rd light emitting diode, resistance R1, R2, R3, R4；The break-make control that external back-up battery provides trigger voltage path to controllable silicon is concatenated into from touch-switch and the first photoelectric coupling circuit, the first photoelectric coupling circuit break-make is by automobile batteries control；Only when the battery anti-short-circuit protection of positive access of external back-up battery and automobile, touch-switch is clicked on, controlled silicon conducting, external back-up battery charges to automobile batteries, so that will not be struck sparks in battery folders folder cell process；Other situations, controllable silicon, which is in, closes, and with whether operating touch-switch unrelated；Battery folders are removed in charging process, controllable silicon is immediately turned off, without setting up usually non-touching contact separately on the inside of the upper and lower clamping plate of battery folders, with single lead.

Description

A kind of anti-short-circuit protection of emergency power supply

Technical field

The utility model is related to a kind of anti-short-circuit protection of field of power supplies, particularly emergency power supply.

Background technology

With the development of the society, more and more people possess private car, but often improper use can cause many problems Appearance, such as people forgets the lamp that cut-offs when leaving, or forgets to close vehicle electronic device, and the storage so that vehicle-mounted use for a long time Battery is easy for occurring the situation of not enough power supply, and when starting vehicle next time, used power supply is also by this Battery is provided, and automobile starting can be caused to fail when accumulator electric-quantity is not enough, at this time, it is necessary to start using car emergency Power supply provides power supply for automobile starting temporarily.But, because automobile batteries（Vehicle-mounted battery）And emergency starting power supply all has There is the characteristics of can producing instantaneous large-current, if during using emergency starting power supply as automobile starting power supply, not noting slightly producing Short circuit or reversal connection, moment can produce the high current of kiloampere, can not only cause emergency starting power supply to damage, or even caused Fire causes user injured.

Anti-reverse and short circuit current, such as patent application therefore, many producers begin one's study in car emergency startup power supply Number it is：A kind of Multifunction auto starting power source disclosed in 200520054634.1, in response to anxious startup power supply (internal battery) with The anti-reverse short-circuit protection circuit connected between vehicle-mounted battery is by relay implement body control electric current path, it is known that should Anxious startup power supply and vehicle-mounted battery all have the characteristics of can produce instantaneous large-current, so relay is it is necessary that with large-scale Relay, therefore there is the more bulky defect of anti-reverse short-circuit protection circuit constituted with relay；Got on the bus because ought correctly connect Current path is open-minded immediately during the battery of load, so that there are battery folders sparking occurs now during vehicle-mounted battery is pressed from both sides The defect of elephant, though starting emergency starting power supply provided with touch-switch, that is to take down vehicle-mounted battery and use；In order to from Vehicle-mounted operating point can disconnect emergency starting power supply to battery folders current path after taking out battery folders, upper and lower two pieces in battery folders It is respectively equipped with and is usually not in contact with each other a little on the inside of clamping plate, and difference lead is to anti-reverse short-circuit protection circuit, therefore there are battery folders not The defect of energy single lead to anti-reverse short-circuit protection circuit.

Nowadays the progress for burying battery has promoted it to use on a large scale, is had become using battery is buried as emergency starting power supply Widespread practice in industry, and the anti-reverse short-circuit protection circuit volume mistake of emergency starting source current path is constituted with relay In huge and heaviness, it is 12V18AH plumbic acid maintenance-free batteries, whole system about 10 that it, which is often used in emergency starting power supply, Kilogram weight, so the problem of can not considering portable, but after emergency starting power supply changes into and buries battery, whole system weight is only 400 grams, the volume and weight of this anti-reverse short-circuit protection circuit that emergency starting source current path is constituted with relay are just Obviously be not suitable for.Therefore there is the anti-reverse short-circuit protection circuit for being constituted emergency starting source current path with semiconductor devices to go out It is existing, as number of patent application is：201410399268.7 a kind of disclosed anti-short circuit protection system of emergency power supply, emergency starting power supply The anti-reverse short-circuit protection circuit being connected between vehicle-mounted battery uses FET control electric current path, overcomes use The more bulky defect of anti-reverse short-circuit protection circuit that relay is constituted, but also exist：Because ought correctly connect vehicle-mounted storage Current path is open-minded immediately during battery, so that there are battery folders lacking for spark phenomenon occurs during vehicle-mounted battery is pressed from both sides Fall into；In order to which emergency starting power supply can be disconnected to battery folders current path after taking out battery folders from vehicle-mounted operating point, in battery folders It is respectively equipped with and is usually not in contact with each other a little on the inside of upper and lower two clamping plates, and difference lead is to anti-reverse short-circuit protection circuit, therefore exist Battery folders can not use the defect of single lead to anti-reverse short-circuit protection circuit.

It is well-known：Vehicle-mounted accumulator capacity is nominally generally 12V, more than 45AH, and the residue after interim overdischarge Electricity typically is all entirely capable of meeting powering to several watts of low-power circuit；So for the ease of emergency starting power supply and vehicle-mounted connection Start automobile after, remove battery folders and terminate, often be during emergency starting power initiation automobile retain on-vehicle battery.

The content of the invention

The purpose of this utility model is, to overcome oneself to have the weak point of technology, battery folders to be passed through for emergency starting power supply It is connected to vehicle-mounted battery the two poles of the earth and retains battery and start the mode of automobile, proposes a kind of anti-short-circuit protection of emergency power supply Device.

The technical solution for realizing the utility model purpose is：A kind of anti-short-circuit protection of emergency power supply, by connecting It is made up of power port A, the first battery folders B1, the second battery folders B2 protection circuit 100, power port A and outside standby electricity The corresponding ports in pond are connected, and the first battery folders B1 and the second battery folders B2 are connected with two electrodes of the battery of automobile respectively； The protection circuit 100 includes the first photoelectric coupling circuit U1, the second photoelectric coupling circuit U2, voltage-regulator diode VD, switching diode D, controllable silicon VS, touch-switch SW, the first LED 1, the second LED 2, the 3rd light emitting diode LED3, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4；Switching diode D anode and first resistor R1 one end is respectively connected to the wiring of power port A positive terminal and the first battery folders B1 by wire after being connected with each other End；Contact of the switching diode D negative electrode through touch-switch SW and the colelctor electrode of phototriode in the first photoelectric coupling circuit U1 It is connected；The emitter stage of phototriode is through second resistance R2 and the first LED 1 in first photoelectric coupling circuit U1 Anode is connected, and in the first photoelectric coupling circuit U1 phototriode emitter stage through 3rd resistor R3's and the 4th resistance R4 The colelctor electrode of phototriode is connected with each other in one end, voltage-regulator diode VD negative electrode and the second photoelectric coupling circuit U2；First electricity The resistance R1 other end is connected with the anode of the second LED 2 and the negative electrode of the 3rd LED 3, the second hair Optical diode LED2 negative electrode is connected with the anode of light emitting diode in the first photoelectric coupling circuit U1；3rd light emitting diode LED3 anode is connected with the negative electrode of light emitting diode in the second photoelectric coupling circuit U2；Luminous two in first photoelectric coupling circuit U1 By leading after the anode of light emitting diode, controllable silicon VS anode are connected with each other in the negative electrode of pole pipe, the second photoelectric coupling circuit U2 Line accesses the second battery folders B2 terminals；Controllable silicon VS grid (control pole) is connected with voltage-regulator diode VD anode； The emitter stage of phototriode, the resistance R4 other end, first luminous two in controllable silicon VS negative electrode, the second photoelectric coupling circuit U2 Pole pipe LED1 negative electrode accesses power port A negative terminals by wire after being connected with each other.

The utility model compared with prior art, its remarkable advantage：The utility model not only realizes small volume, answers urgent telegram Source is anti-short-circuit, anti-reverse, counnter attack charge protection, also achieves 1. when correct connection upper vehicle-mounted battery and emergency starting power supply Afterwards, by operating touch-switch to open the current path of emergency starting power supply, ensure that battery folders are pressing from both sides vehicle-mounted electric power storage It is not in the phenomenon of sparking during pond；2. taken out from vehicle-mounted battery and disconnect emergency starting electricity after battery folders immediately Source need not be respectively equipped with the inside of the upper and lower two clamping plates of battery folders and usually be not in contact with each other a little to battery folders current path, only With single lead just.

Brief description of the drawings

Fig. 1 is a kind of connection diagram of the anti-short-circuit protection of emergency power supply of the utility model.

Fig. 2 is a kind of schematic diagram of the protection circuit of the anti-short-circuit protection of emergency power supply of the utility model.

Embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 2, in figure：100. protection circuit, A. power ports, the battery folders of B1. first, the batteries of B2. second Folder, the light emitting diode of LED1, LED2, LED3. first to the 3rd light emitting diode, the photoelectric coupling circuits of U1. first, the light of U2. second Electric coupling apparatus, VD. voltage-regulator diodes, D. switching diodes, VS. controllable silicons, R1, R2, R3, R4. resistance, SW. touch-switch.

A kind of anti-short-circuit protection of emergency power supply of the utility model, by be connected with power port A, the first battery folders B1, Second battery folders B2 protection circuit 100 is constituted, and power port A is connected with the corresponding ports of external back-up battery, the first electricity Pond folder B1 and the second battery folders B2 is connected with two electrodes of the battery of automobile respectively；The protection circuit 100 includes：First light Electric coupling apparatus U1, the second photoelectric coupling circuit U2, voltage-regulator diode VD, switching diode D, controllable silicon VS, touch-switch SW, first LED 1, the second LED 2, the 3rd LED 3, resistance R1, resistance R2, resistance R3, electricity Hinder R4；The anode of the switching diode D is respectively connected to power port A's after being connected with each other with resistance R1 one end by wire Positive terminal Vin+ and the first battery folders B1 terminals；Contact of the switching diode D negative electrode through touch-switch SW and the The colelctor electrode of phototriode is connected in one photoelectric coupling circuit U1；The emitter stage of phototriode in first photoelectric coupling circuit U1 Be connected through resistance R2 with the anode of the first LED 1, and in the first photoelectric coupling circuit U1 phototriode hair Phototriode in the one end of emitter-base bandgap grading through resistance R3 and resistance R4, voltage-regulator diode VD negative electrode and the second photoelectric coupling circuit U2 Colelctor electrode phase simultaneously connects；The moon of the anode and the 3rd LED 3 of the resistance R1 other end and the second LED 2 Pole is connected, and the negative electrode of the second LED 2 is connected with the anode of light emitting diode in the first photoelectric coupling circuit U1； The anode of 3rd LED 3 is connected with the negative electrode of light emitting diode in the second photoelectric coupling circuit U2；First photoelectricity lotus root The anode of light emitting diode, controllable silicon VS anode phase in the negative electrode of light emitting diode, the second photoelectric coupling circuit U2 in clutch U1 The second battery folders B2 terminals mutually and after connecing are accessed by wire；Controllable silicon VS grid (control pole) and voltage-regulator diode VD Anode be connected；The emitter stage of phototriode in controllable silicon VS negative electrode, the second photoelectric coupling circuit U2, resistance R4 it is another End, the first LED 1 negative electrode it is connected with each other after power port A negative terminals Vin- is accessed by wire.

Switching diode D described above is used for the reverse protection of phototriode branch road in the first photoelectric coupling circuit U1.

Touch-switch SW described above for normally opened contact all the way touch-switch, when pressing touch-switch SW, the closing of contact, When unclamping touch-switch SW, contact reverts to disconnection；Touch-switch SW is concatenated with the first photoelectric coupling circuit U1 phototriode Whether co- controlling delivers to trigger signal controllable silicon VS grid (control pole) and the anode of the first LED 1.

Resistance R1 is current-limiting resistance, and limitation is flowed through luminous two in the second LED 2, the first photoelectric coupling circuit U1 The electric current of light emitting diode in the 3rd LED 3, the second photoelectric coupling circuit U2 is flowed through in the electric current of pole pipe, and limitation.

When the reverse battery of automobile accesses protection circuit 100, the 3rd LED 3 lights, the second photoelectric coupling LEDs ON is lighted in device U2, and phototriode is turned in the second photoelectric coupling circuit U2, in the second photoelectric coupling circuit U2 Phototriode is through voltage-regulator diode VD by controllable silicon VS grid and controllable silicon VS negative electrode short circuit；Second light emitting diode LED2 reversely ends（Do not light）, reversely cut-off does not light light emitting diode in the first photoelectric coupling circuit U1, the first photoelectric coupling Phototriode ends in device U1.

When the battery forward direction access protection circuit 100 of automobile, the 3rd reversely cut-off of LED 3（Do not light）, Reversely cut-off does not light light emitting diode in second photoelectric coupling circuit U2, and phototriode ends in the second photoelectric coupling circuit U2, In second photoelectric coupling circuit U2 phototriode without voltage-regulator diode VD by controllable silicon VS grid and controllable silicon VS negative electrode Short circuit；The conducting of second LED 2 is luminous, and LEDs ON lights in the first photoelectric coupling circuit U1, the first photoelectricity Phototriode is turned in coupling apparatus U1.

When the battery of automobile does not access protection circuit 100, by shape of being opened a way at the first battery folders B1 and the second battery folders B2 State, no matter external back-up battery is positive or reversely accesses protection circuit 100, the second LED the 2, the 3rd lights Light emitting diode is not sent out in light emitting diode and the second photoelectric coupling circuit U2 in diode (LED) 3, the first photoelectric coupling circuit U1 Phototriode is turned off in phototriode and the second photoelectric coupling circuit U2 in light, the first photoelectric coupling circuit U1；And when outside When reserve battery is reverse access protection circuit 100, it is reverse to be added to controllable silicon VS anodes with cathode voltage.

When the battery of automobile does not access protection circuit 100, by short-circuit shape at the first battery folders B1 and the second battery folders B2 State, no matter external back-up battery is positive or reversely accesses protection circuit 100, the second LED the 2, the 3rd lights Light emitting diode is not sent out in light emitting diode and the second photoelectric coupling circuit U2 in diode (LED) 3, the first photoelectric coupling circuit U1 Phototriode is turned off in phototriode and the second photoelectric coupling circuit U2 in light, the first photoelectric coupling circuit U1；And when outside When reserve battery is reverse access protection circuit 100, it is reverse to be added to controllable silicon VS anodes with cathode voltage.

When external back-up battery does not access protection circuit 100, by open-circuit condition at positive and negative electrode in power port A, no matter The battery of automobile is positive or reversely accesses protection circuit 100, and in spite of touch-switch SW is pressed, equal Triggerless is arrived Up to controllable silicon VS grid, the first LED 1 will not be also lit.

When external back-up battery does not access protection circuit 100, by positive and negative electrode short circuit in power port A, regardless of automobile Battery is positive or reversely accesses protection circuit 100, and in spite of touch-switch SW is pressed, equal Triggerless reaches controllable Silicon VS grid, the first LED 1 will not be also lit.

When the battery of external back-up battery and automobile reversely accesses protection circuit 100, touched out in spite of pressing SW is closed, equal Triggerless reaches controllable silicon VS grid, and the first LED 1 will not be also lit；And due to automobile Battery be in power shortage, the anode and cathode voltage for being added to controllable silicon VS be reverse；

When external back-up battery reversely accesses protection circuit 100, the battery forward direction access protection circuit 100 of automobile, no Whether pipe presses touch-switch SW, and equal Triggerless reaches controllable silicon VS grid, and the first LED 1 also will not It is lit；And it is reverse to be added to controllable silicon VS anode and cathode voltage.

When the reverse battery of external back-up battery forward direction access protection circuit 100, automobile accesses protection circuit 100, no Whether pipe presses touch-switch SW, and equal Triggerless reaches controllable silicon VS grid, and the first LED 1 also will not It is lit.

When the battery positive access protection circuit 100 of external back-up battery and automobile, before touch-switch SW is pressed, Controllable silicon VS is off state, when pressing touch-switch SW, has trigger signal to reach controllable silicon VS grid, and controllable silicon VS is led Lead to, and the first LED 1 is lit, external back-up battery charges to the battery of automobile, because the battery of automobile is in charging It is preceding to be in power shortage state, therefore charging stream is much larger than controllable silicon VS latching current, so after controllable silicon VS conductings, being added to controllable silicon The control voltage of VS grids is ineffective, so unclamping touch-switch SW, external back-up battery keeps the normal battery to automobile Charging, the first LED 1 extinguishes, and Triggerless reaches controllable silicon VS grid.

Because it is microsecond (μ s) level that the retention time of the trigger voltage of controllable silicon VS grid, which requires, when user sees When first LED 1 is lit, the control voltage of the triggerable conducting of controllable silicon VS grid is added to（Electric current）Institute The time of holding meets certainly, so user sees that the first LED 1 unclamps the touch-switch pinned after being lit SW, is added to the control voltage of the triggerable conducting of controllable silicon VS grids（Electric current）Time for being kept meet certainly.More than First LED 1 is lit, and is applied not only to prompting user and is unclamped touch-switch SW, also points out user：Outside standby electricity The battery of pond and automobile is positive access protection circuit 100.

When external back-up battery to the battery of automobile just in charging process, start automobile success after, automobile current generator is opened Electricity is originated, and is charged to the battery of automobile, the voltage is far above external back-up battery（Outside lithium battery）Voltage, so as to be formed Backward voltage adds between controllable silicon VS anode and negative electrode, and by controllable silicon VS off states, therefore it is outside to form reverse current Portion's reserve battery（Outside lithium battery）Charging, i.e., will not form reverse current and damage external back-up battery（Outside lithium electricity Pond）, so automobile current generator generates electricity into the battery charging process of automobile, battery folders are not removed from the battery of automobile, also not Reverse battery is had to external back-up battery（Outside lithium battery）Charging.

When external back-up battery to the battery of automobile just in charging process, flow through resistance R1 electricity when charging current is added Maintenance electric current of the stream less than controllable silicon VS, by controllable silicon VS off states.

When external back-up battery to the battery of automobile just in charging process, remove battery folders from the battery of automobile, can Control silicon VS is turned off.

When external back-up battery to the battery of automobile just in charging process, remove external back-up battery from power port A, Controllable silicon VS is turned off.

When external back-up battery to the battery of automobile just in charging process, after controllable silicon VS shut-offs, need to operate again light Touch switch SW and could realize and charged again to the battery of automobile, therefore start automobile success, after automobile current generator generates electricity, do not operate light Touch switch SW, the possibility of the battery charging of the no longer oriented automobile of external back-up battery.

Power port A is to be used for protection circuit 100 and external back-up battery connectivity port, and it is exported with external back-up battery The corresponding connection in port, is oriented to anti-external back-up battery with physics and reversely accesses protection circuit 100.Certainly external back-up battery is worked as Protection circuit 100 is reversely accessed, protection circuit 100 also functions to reverse connecting protection effect.

The protection circuit 100 be arranged on closing box body in, by being punched to box body, by touch-switch SW button, First LED 1, the second LED 2, the 3rd LED 3 are on cartridge outer surface.

3rd LED 3 is set to the optical diode glowed, and the first LED 1 and second is luminous Diode (LED) 2 is disposed as the optical diode of green light.

Controllable silicon VS is used to specifically control charging circuit break-make, and the present invention selects one-way SCR, and the unidirectional of selection can The maintenance electric current that control silicon is led should be greater than the maximum current flowed through by resistance R1, so that it is guaranteed that：External back-up battery is to automobile In battery charging process, when first removing battery folders, make to flow through controllable silicon VS electric currents less than electric current is maintained, so that controllable silicon VS be closed It is disconnected.In order to which after external back-up battery forward direction accesses protection circuit 100, the first battery folders B1 and the second battery folders B2 are not connect to vapour The battery of car, and in open-circuit condition, it is ensured that leakage current is flowed through in the second LED 2 and the first photoelectric coupling circuit U1 Light emitting diode does not light, therefore should also select the small one-way SCR of leakage current.

The function that the utility model is realized has：

After external back-up battery accesses protection circuit 100 forward or backwards, the first battery folders B1 and the second battery folders B2 Do not connect the battery to automobile, and during in open circuit or short-circuit condition, controllable silicon VS is off state, and with whether pressing and touching Switch SW unrelated, therefore external back-up battery will not be short-circuited；

After the battery of automobile accesses protection circuit 100 forward or backwards, power port A does not connect with external back-up battery Connect, when two electrodes are in open circuit or short-circuit condition in power port A, controllable silicon VS is off state, and with whether pressing gently Touch switch SW unrelated, therefore the battery of automobile will not be short-circuited；

When the battery of external back-up battery and automobile reversely accesses protection circuit 100, controllable silicon VS is off shape State, and with whether pressing that touch-switch SW is unrelated, therefore the battery of automobile will not be electrically charged；

, can when external back-up battery reversely accesses the battery forward direction access protection circuit 100 of protection circuit 100 and automobile Control silicon VS is off state, and with whether pressing that touch-switch SW is unrelated, therefore the battery of external back-up battery and automobile is end to end Will not be concatenated into electric discharge and it is short-circuit；

, can when the reverse battery of automobile accesses protection circuit 100 and external back-up battery forward direction access protection circuit 100 Control silicon VS is off state, and with whether pressing that touch-switch SW is unrelated, therefore the battery of external back-up battery and automobile is end to end Will not be concatenated into electric discharge and it is short-circuit；

When battery and the external back-up battery positive access protection circuit 100 of automobile, before touch-switch SW is pressed, Controllable silicon VS is off state, and when clicking on touch-switch SW, controllable silicon VS conductings, external back-up battery fills to the battery of automobile Electricity；

When external back-up battery to the battery of automobile just in charging process, start automobile success after, automobile current generator is opened Electricity is originated, and is charged to the battery of automobile, the voltage is far above external back-up battery（Outside lithium battery）Voltage, so as to be formed Backward voltage adds between controllable silicon VS anode and negative electrode, and by controllable silicon VS off states, therefore it is outside to form reverse current Portion's reserve battery（Outside lithium battery）Charging, i.e., will not form reverse current and damage external back-up battery（Outside lithium electricity Pond）, so automobile current generator generates electricity into the battery charging process of automobile, battery folders are not removed from the battery of automobile, also not Reverse battery is had to external back-up battery（Outside lithium battery）Charging；

When external back-up battery to the battery of automobile just in charging process, flow through resistance R1 electricity when charging current is added Maintenance electric current of the stream less than controllable silicon VS, by controllable silicon VS off states；

When external back-up battery to the battery of automobile just in charging process, remove battery folders from the battery of automobile, can Control silicon VS is turned off；

When external back-up battery to the battery of automobile just in charging process, remove external back-up battery from power port A, Controllable silicon VS is turned off；

When external back-up battery to the battery of automobile just in charging process, after controllable silicon VS shut-offs, need to operate again light Touch switch SW and could realize and charged again to the battery of automobile, therefore start automobile success, after automobile current generator generates electricity, do not operate light Touch switch SW, the possibility of the battery charging of the no longer oriented automobile of external back-up battery；

It is proposed that：After touch-switch SW is unclamped, start automobile, and after ensuring that automobile current generator generates electricity, do not operate Touch-switch SW, the possibility of the battery charging of the no longer oriented automobile of external back-up battery.

Application method

1）After the battery of automobile is accessed into protection circuit 100, the 3rd lumination of light emitting diode LED3 lights, and illustrates automobile Reverse battery be linked into protection circuit 100；

2）After the battery of automobile is accessed into protection circuit 100, the second lumination of light emitting diode LED2 lights, and illustrates automobile Battery forward direction be linked into protection circuit 100；

3）When the second lumination of light emitting diode LED2 and the 3rd lumination of light emitting diode LED3 do not light, illustrate automobile Battery is not linked into protection circuit 100；

4）After the second lumination of light emitting diode LED2, touch-switch SW is pressed, the first lumination of light emitting diode LED1 is not Luminous, illustrate that outer portion is standby has access protection circuit 100 or external back-up battery reversely to access protection circuit 100 with battery No；

5）After the second lumination of light emitting diode LED2, touch-switch SW, the first lumination of light emitting diode LED1 hair is pressed Light, illustrates external back-up battery forward direction access protection circuit 100, and the VS conductings of triggering controllable silicon.

In the utility model：

When the positive pole of external back-up battery is communicated with power port A positive terminal Vin+, external back-up battery it is negative When pole power port A negative terminals Vin- is communicated, show external back-up battery forward direction access protection circuit 100；Work as outside The positive pole of reserve battery is communicated with power port A negative terminals Vin-, and the negative power supply port A of external back-up battery is just When pole terminals Vin+ is communicated, show that external back-up battery reversely accesses protection circuit 100.

When the positive pole of the battery of automobile is communicated with the first battery folders B1, the second battery folders of negative pole B2 of the battery of automobile is communicated When, show the battery forward direction access protection circuit 100 of automobile；When the positive pole of the battery of automobile is communicated with the second battery folders B2, vapour When the first battery folders of negative pole B1 of the battery of car is communicated, show the reverse battery access protection circuit 100 of automobile.

Claims

1. a kind of anti-short-circuit protection of emergency power supply, by being connected with power port A, the first battery folders B1, the second battery folders B2 Protection circuit 100 constitute, power port A is connected with the corresponding ports of external back-up battery, the first battery folders B1 and second Battery folders B2 is connected with two electrodes of the battery of automobile respectively；It is characterized in that：The protection circuit 100 includes the first photoelectricity Coupling apparatus U1, the second photoelectric coupling circuit U2, voltage-regulator diode VD, switching diode D, controllable silicon VS, touch-switch SW, the first hair Optical diode LED1, the second LED 2, the 3rd LED 3, first resistor R1, second resistance R2, the 3rd Resistance R3 and the 4th resistance R4；Distinguished after being connected with each other by wire switching diode D anode and first resistor R1 one end Access power port A positive terminal and the first battery folders B1 terminals；Switching diode D negative electrode is through touch-switch SW Contact be connected with the colelctor electrode of phototriode in the first photoelectric coupling circuit U1；Photosensitive three pole in first photoelectric coupling circuit U1 The emitter stage of pipe is connected through second resistance R2 with the anode of the first LED 1, and in the first photoelectric coupling circuit U1 The one end of the emitter stage of phototriode through 3rd resistor R3 and the 4th resistance R4, voltage-regulator diode VD negative electrode and the second photoelectricity The colelctor electrode of phototriode is connected with each other in coupling apparatus U2；The first resistor R1 other end and the second LED 2 The negative electrode of anode and the 3rd LED 3 is connected, the negative electrode and the first photoelectric coupling circuit of the second LED 2 The anode of light emitting diode is connected in U1；Light two in the anode of 3rd LED 3 and the second photoelectric coupling circuit U2 The negative electrode of pole pipe is connected；In first photoelectric coupling circuit U1 luminous two in the negative electrode of light emitting diode, the second photoelectric coupling circuit U2 The anode of pole pipe, controllable silicon VS anode access the second battery folders B2 terminals by wire after being connected with each other；Controllable silicon VS Grid (control pole) be connected with voltage-regulator diode VD anode；Light in controllable silicon VS negative electrode, the second photoelectric coupling circuit U2 Emitter stage, the resistance R4 other end, the negative electrode of the first LED 1 of quick triode are connect after being connected with each other by wire Enter power port A negative terminals.

2. the anti-short-circuit protection of emergency power supply according to claim 1, it is characterised in that：The controllable silicon VS is unidirectional Controllable silicon VS.

3. the anti-short-circuit protection of emergency power supply according to claim 1, it is characterised in that：The touch-switch SW is one Road normally opened contact touch-switch SW.

4. the anti-short-circuit protection of emergency power supply according to claim 2, it is characterised in that：The one-way SCR VS, Electric current is maintained to be more than the maximum current for flowing through resistance R1.

5. the anti-short-circuit protection of emergency power supply according to claim 1, it is characterised in that：3rd light emitting diode LED3 is set to the optical diode glowed, and the first LED 1 and the second LED 2 are disposed as greening The optical diode of light.