CN209313470U - A kind of protection circuit that car emergency startup power supply is docked with automobile starting battery - Google Patents
A kind of protection circuit that car emergency startup power supply is docked with automobile starting battery Download PDFInfo
- Publication number
- CN209313470U CN209313470U CN201822243873.1U CN201822243873U CN209313470U CN 209313470 U CN209313470 U CN 209313470U CN 201822243873 U CN201822243873 U CN 201822243873U CN 209313470 U CN209313470 U CN 209313470U
- Authority
- CN
- China
- Prior art keywords
- automobile starting
- power supply
- resistance
- circuit
- switching tube
- Prior art date
- 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.)
- Active
Links
Abstract
The utility model provides a kind of protection circuit that car emergency startup power supply is docked with automobile starting battery, and setting is docked on conducting wire in car emergency startup power supply with automobile starting battery, including switching tube Q1, Q2 and current detection circuit and protection control circuit；Switching tube Q1, Q2 are NMOS tube, and the grid of switching tube Q1, Q2 connect the 3rd foot of optocoupler U3, U4, and the 4th foot of optocoupler U3, U4 connect the anode of car emergency startup power supply；Voltage between the DS of current detection circuit detection switch pipe Q2, protection control circuit generate control signal P according to the output of current detection circuit, and control signal P connects the 1st foot of optocoupler U2 and optocoupler U3 respectively.Short circuit, reversal connection, over-voltage and open circuit are judged whether by voltage signal, current signal that single-chip microcontroller samples automobile starting battery-end in the utility model, the conducting of circuit is docked to control car emergency startup power supply with automobile starting battery.
Description
Technical field
The utility model relates to a kind of protection circuit fields that car emergency startup power supply is docked with automobile starting battery.
Background technique
It is direct-connected with both threads that emergency starting power supply, which meets an urgent need and takes fire all to the docking of automobile starting battery, at present, as shown in Figure 1,
The anode and cathode both ends of car emergency startup power supply respectively with the anode of automobile starting battery (usually lead-acid accumulator) and
Cathode using conducting wire be connected, under such circumstances, layman operation, it is easy to cause emergency starting power supply short circuit, reversal connection,
Anti-down equal damage, seriously affects personal safety.
Utility model content
Caused by car emergency startup power supply for directly directly connecting with automobile starting battery by the utility model at present
Deficiency, provide a kind of protection circuit that car emergency startup power supply is docked with automobile starting battery, setting is opened in car emergency
Dynamic power supply is directly and on the connecting line of automobile starting battery.
The utility model is that technical solution used by realizing its technical purpose is: a kind of car emergency startup power supply and vapour
Vehicle starts the protection circuit of battery docking, and setting is docked on conducting wire in car emergency startup power supply with automobile starting battery, including
Switching tube Q1 and switching tube Q2 and current detection circuit and protection control circuit；
The switching tube Q1 and switching tube Q2 is NMOS tube, and the pole S of switching tube Q1 connects car emergency startup power supply
Cathode, the pole D are extremely connected with the D of switching tube Q2, the pole S of switching tube Q2 connects the cathode of automobile starting battery；
The grid of the switching tube Q1 connects the 3rd foot of optocoupler U2, and the 4th foot of optocoupler U2 connects car emergency startup power supply
Conducting wire between anode and automobile starting galvanic anode, the grid of switching tube Q2 connect the 3rd foot of optocoupler U3, the 4th foot of optocoupler U3
Connect the conducting wire between the anode of car emergency startup power supply and automobile starting galvanic anode；
Voltage between the DS of the current detection circuit detection switch pipe Q2, the protection control circuit is according to electricity
The output of current detection circuit generates control signal P, and control signal P connects the 1st foot of optocoupler U2 and optocoupler U3 respectively, optocoupler U2 and
The 2nd foot of optocoupler U3 connects starting cell cathode respectively.
In the utility model by single-chip microcontroller sample automobile starting battery-end voltage signal, current signal judge whether it is short
Road, reversal connection, over-voltage and open circuit dock the conducting of circuit to control car emergency startup power supply with automobile starting battery, thus real
Show short-circuit protection, the reverse connecting protection, no-voltage docking, reverse-filling function that emergency starting power supply is docked with automobile starting battery.
Further, in the protection circuit that above-mentioned car emergency startup power supply is docked with automobile starting battery: described
Current detection circuit includes operational amplifier U4, resistance R7, resistance R8, resistance R9 and resistance R10；The operational amplifier U4
Non-inverting input terminal the pole S of switching tube Q2 is connect by resistance R7, out-phase end connects the pole D of switching tube Q2 by resistance R8；Resistance R9
It is arranged between the non-inverting input terminal and output end of operational amplifier U4, is connected in resistance R9 with operational amplifier output terminal
One end of public terminating resistor R10, the other end of resistance R10 form the output I-DET of the current detection circuit.
Further, in the protection circuit that above-mentioned car emergency startup power supply is docked with automobile starting battery: further including
Capacitor C4, the capacitor C10 be arranged in the current detection circuit output I-DET and automobile starting cell cathode it
Between.
Further, in the protection circuit that above-mentioned car emergency startup power supply is docked with automobile starting battery: described
Protecting control circuit includes single-chip microcontroller U1, resistance R5, resistance R6 diode D1；The anode of automobile starting battery passes through two pole of counnter attack
Pipe D1 connects the 1st pin of single-chip microcontroller U1, and the 8th pin of single-chip microcontroller U1 connects the cathode of automobile starting battery, and the 5th of single-chip microcontroller U1 the
Pin connects using resistance R5 and resistance R6 to the voltage signal between the anode and cathode of automobile starting battery；Single-chip microcontroller
The 6th pin of U1 meets the output I-DET of current detection circuit；The 2nd pin of single-chip microcontroller U1 forms the protection control circuit
Output P.
Further, in the protection circuit that above-mentioned car emergency startup power supply is docked with automobile starting battery: described
The model of single-chip microcontroller U1 is PIC12F1822.The single-chip microcontroller U1 sampled voltage current signal realizes control short circuit, reversal connection, mistake
Pressure and open-circuit-protection.
The utility model is further detailed below in conjunction with the drawings and specific embodiments.
Detailed description of the invention
The current emergency starting power supply of attached drawing 1, which is met an urgent need, takes fiery schematic diagram to the docking of automobile starting battery.
Attached drawing 2 is that the emergency starting power supply of the utility model meets an urgent need and gives automobile starting battery Dui Jie Ta fire schematic diagram.
Attached drawing 3 be emergency starting power supply meet an urgent need docking to automobile starting battery take fire it is direct-connected when protect circuit diagram.
Attached drawing 4 be emergency starting power supply meet an urgent need docking to automobile starting battery take fire it is direct-connected when electric current galvanometer circuit principle
Figure.
Attached drawing 5 be emergency starting power supply meet an urgent need docking to automobile starting battery take fire it is direct-connected when protect control circuit principle
Figure.
Specific embodiment
Embodiment 1, as shown in Fig. 2, the present embodiment is a kind of is arranged in car emergency startup power supply and automobile starting battery
The protection circuit of docking, as shown in figure 3, the circuit, which is arranged, docks conducting wire with automobile starting battery in car emergency startup power supply
On, including switching tube Q1 and switching tube Q2 and current detection circuit and protection control circuit；
Switching tube Q1 and switching tube Q2 is NMOS tube, and the pole S of switching tube Q1 connects the cathode of car emergency startup power supply, D
Pole is extremely connected with the D of switching tube Q2, the pole S of switching tube Q2 connects the cathode of automobile starting battery.The grid of switching tube Q1 connects optocoupler
4th foot of the 3rd foot of U2, optocoupler U2 connects the conducting wire between the anode of car emergency startup power supply and automobile starting galvanic anode,
The grid of switching tube Q2 connects the 3rd foot of optocoupler U3, and the 4th foot of optocoupler U3 connects the anode of car emergency startup power supply and automobile opens
Conducting wire between dynamic galvanic anode；Voltage between the DS of current detection circuit detection switch pipe Q2, the protection control electricity
Road generates control signal P according to the output of current detection circuit, and control signal P connects the 1st foot of optocoupler U2 and optocoupler U3 respectively,
The 2nd foot of optocoupler U2 and optocoupler U3 connects starting cell cathode respectively.
The car emergency startup power supply of the present embodiment docks novel protected circuit, including car emergency with automobile starting battery
Startup power supply docks circuit, current detection circuit and protection control circuit with automobile starting battery.Car emergency startup power supply with
The cathode that automobile starting battery docks the emergency starting power supply of circuit passes through the extremely concatenated NMOS tube of two D and automobile starting electricity
The cathode in pond connects, and anode is directly connected to；Current detection circuit detects the DS of the NMOS Q2 of connection battery-end with operational amplifier
The voltage output current signal of pole gives single-chip microcontroller U1；The protection control circuit samples automobile starting battery-end by single-chip microcontroller
Voltage signal, current signal judge whether short circuit, reversal connection, over-voltage and open circuit, to control car emergency startup power supply and automobile
Start the conducting of battery docking circuit, to realize short-circuit protection that emergency starting power supply docks with automobile starting battery, be reversely connected
Protection, no-voltage docking, reverse-filling function.
Specifically, emergency starting power supply docks the switching tube Q1 and switch that circuit includes NMOS tube with automobile starting battery
Pipe Q2；Current-limiting resistance R1, resistance R2, resistance R3 and resistance R4；Optocoupler U2 and optocoupler U3；The one end current-limiting resistance R2 and switching tube Q1
The pole S and car emergency startup power supply cathode BAT- connection, the pole G of the current-limiting resistance R2 other end and switching tube Q1 and current-limiting resistance
The connection of the one end R1；3 feet of optocoupler U2 are connect with the resistance R1 other end；4 feet and emergency starting positive pole BAT+ of optocoupler U2 connect
It connects；2 feet of optocoupler U2 are connect with automobile starting battery cathode CBAT-；The 1 foot control signal P1 connection of optocoupler U2；Switching tube Q1
The pole D connect with the pole D of switching tube Q2；The one end current-limiting resistance R4 with the pole S of switching tube Q2 and automobile starting battery cathode
CBAT- connection；The current-limiting resistance R4 other end is connect with the pole G of switching tube Q2 and the one end current-limiting resistance R3；3 feet of optocoupler U3 with
The other end of current-limiting resistance R3 connects；4 feet of optocoupler U3 are connect with automobile starting anode CBAT+；2 feet and vapour of optocoupler U3
Vehicle starts battery cathode CBAT- connection；The 1 foot control signal P1 connection of the optocoupler U3；Emergency starting positive pole BAT+ with
The CBAT+ connection of automobile starting anode.
Car emergency startup power supply docks novel protected circuit with automobile starting battery and controls optocoupler by control signal P1
The conducting and shutdown of U2 and U3 realizes that car emergency startup power supply is docked and turned off with automobile starting battery, thus to realize
Short-circuit protection that emergency starting power supply is docked with automobile starting battery, no-voltage docking, reverse connecting protection, reverse-filling function.
Current detection circuit is as shown in figure 4, include operational amplifier U4, resistance R7, resistance R8, resistance R9 and resistance
R10；The non-inverting input terminal of operational amplifier U4 connects the pole S of switching tube Q2 by resistance R7, and out-phase end connects switch by resistance R8
The pole D of pipe Q2；Resistance R9 is arranged between the non-inverting input terminal and output end of operational amplifier U4, in resistance R9 and operation amplifier
One end of the connected public terminating resistor R10 of device output end, the other end of resistance R10 form the defeated of the current detection circuit
I-DET out.Capacitor C4 is additionally included, the output I-DET and automobile starting battery of current detection circuit is arranged in capacitor C10
Between cathode.
Specifically, current detection circuit includes operational amplifier U4；Current-limiting resistance R7, resistance R8, resistance R9 and resistance
R10；The one end current-limiting resistance R8 is connect with the pole D of switching tube Q1, Q2；The other end of current-limiting resistance R8 and the 2 of operational amplifier U4
Foot connection；The one end current-limiting resistance R7 is connect with 3 feet of operational amplifier U4 and the one end current-limiting resistance R9；Current-limiting resistance R7's is another
One end is connect with automobile starting battery cathode CBAT-；The other end of current-limiting resistance R9 and 6 feet of operational amplifier U4 and current limliting
The connection of the one end resistance R10；The other end output current signal I-DET of current-limiting resistance R10.
Control circuit is protected as shown in figure 5, including single-chip microcontroller U1, resistance R5, resistance R6 diode D1；Automobile starting battery
Anode the 1st pin of single-chip microcontroller U1 is connect by counnter attack diode D1, the 8th pin of single-chip microcontroller U1 connects automobile starting battery
5th pin of cathode, single-chip microcontroller U1 connects using resistance R5 and resistance R6 to the electricity between the anode and cathode of automobile starting battery
Press voltage division signal；The 6th pin of single-chip microcontroller U1 meets the output I-DET of current detection circuit；The 2nd pin of single-chip microcontroller U1 is formed
The output P of the protection control circuit.The model PIC12F1822 of single-chip microcontroller U1.
Specifically, protection control circuit includes single-chip microcontroller U1, divider resistance R5 and resistance R6；Anti-reverse diode D1.Point
Piezoresistance R5 automobile starting anode CBAT+；The other end is connect with 5 feet of divider resistance R6 and U1；The divider resistance R6
The other end is connect with automobile starting battery cathode CBAT-；Described one end anti-reverse diode D1 and automobile starting anode
The power supply foot 1 of CBAT+ connection, the other end and U1 connect, and in the present embodiment, single-chip microcontroller U1 sampled voltage current signal realizes control
System short circuit, reversal connection, over-voltage and open-circuit-protection.
In the present embodiment, emergency starting power supply is exported to when the circuit short circuit of automobile starting battery, and voltage is single close to 0V
The power supply of piece machine is too small and can not work, and switching tube Q1 and switching tube Q2 are turned off, and close emergency starting power supply and automobile starting battery
Between the circuit docked, reach short-circuit protection function；The voltage of the 5 feet sampling automobile starting battery-end of single-chip microcontroller U1, detects
When voltage is greater than emergency starting power supply, it is judged as that automobile starting cell voltage is high, 2 feet of single-chip microcontroller export low level, switching tube
Q1 and Q2 is turned off, and closes the circuit docked between emergency starting power supply and automobile starting battery, and automobile starting battery cannot correspond to
Anxious startup power supply charging, reaches reverse-filling function；6 feet of single-chip microcontroller U1 sample current signal I-DET, when electric current is less than 2A,
It is determined as that output open circuit, switching tube Q1 and Q2 turn off, the circuit docked between emergency starting power supply and automobile starting battery is obstructed,
Reach no-voltage to connection function, it is not in unexpected that emergency starting power supply, which is docked with automobile starting battery because of no-voltage,
Export high current and spark phenomenon；The reverse-connection preventing circuit being made of diode D1, switching tube Q1 and Q2, emergency starting power supply and vapour
When vehicle starting battery docking polarity is opposite, due to the characteristic of diode, U1 will not be damaged, the shutdown electricity of switching tube Q1 and Q2 composition
The circuit docked between the disconnected emergency starting power supply of roadlock and automobile starting battery, reaches reversal connection protection function.
Claims (5)
1. a kind of protection circuit that car emergency startup power supply is docked with automobile starting battery is arranged in car emergency startup power supply
Docked on conducting wire with automobile starting battery, it is characterised in that: including switching tube Q1 and switching tube Q2 and current detection circuit and
Protect control circuit；
The switching tube Q1 and switching tube Q2 is NMOS tube, the pole S of switching tube Q1 connect the cathode of car emergency startup power supply,
The pole D is extremely connected with the D of switching tube Q2, the pole S of switching tube Q2 connects the cathode of automobile starting battery；
The grid of the switching tube Q1 connects the 3rd foot of optocoupler U2, and the 4th foot of optocoupler U2 connects the anode of car emergency startup power supply
With the conducting wire between automobile starting galvanic anode, the grid of switching tube Q2 connects the 3rd foot of optocoupler U3, and the 4th foot of optocoupler U3 connects vapour
Conducting wire between the anode and automobile starting galvanic anode of vehicle emergency starting power supply；
Voltage between the DS of the current detection circuit detection switch pipe Q2, the protection control circuit are examined according to electric current
The output of slowdown monitoring circuit generates control signal P, and control signal P meets the 1st foot of optocoupler U2 and optocoupler U3, optocoupler U2 and optocoupler U3 respectively
The 2nd foot connect starting cell cathode respectively.
2. the protection circuit that car emergency startup power supply according to claim 1 is docked with automobile starting battery, feature
Be: the current detection circuit includes operational amplifier U4, resistance R7, resistance R8, resistance R9 and resistance R10；Described
The non-inverting input terminal of operational amplifier U4 connects the pole S of switching tube Q2 by resistance R7, and out-phase end meets switching tube Q2 by resistance R8
The pole D；Resistance R9 is arranged between the non-inverting input terminal and output end of operational amplifier U4, defeated in resistance R9 and operational amplifier
One end of the connected public terminating resistor R10 of outlet, the other end of resistance R10 form the output of the current detection circuit
I-DET.
3. the protection circuit that car emergency startup power supply according to claim 2 is docked with automobile starting battery, feature
It is: further includes capacitor C4, the output I-DET and automobile starting of the current detection circuit is arranged in the capacitor C10
Between cell cathode.
4. the protection circuit that car emergency startup power supply according to claim 3 is docked with automobile starting battery, feature
Be: the protection control circuit includes single-chip microcontroller U1, resistance R5, resistance R6 diode D1；The anode of automobile starting battery
The 1st pin of single-chip microcontroller U1 is connect by counnter attack diode D1, the 8th pin of single-chip microcontroller U1 connects the cathode of automobile starting battery, single
The 5th pin of piece machine U1, which connects, believes the voltage between the anode and cathode of automobile starting battery using resistance R5 and resistance R6
Number；The 6th pin of single-chip microcontroller U1 meets the output I-DET of current detection circuit；The 2nd pin of single-chip microcontroller U1 forms the guarantor
Protect the output P of control circuit.
5. the protection circuit that car emergency startup power supply according to claim 4 is docked with automobile starting battery, feature
Be: the model PIC12F1822 of the single-chip microcontroller U1, the single-chip microcontroller U1 sampled voltage current signal realize control
Short circuit, reversal connection, over-voltage and open-circuit-protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822243873.1U CN209313470U (en) | 2018-12-29 | 2018-12-29 | A kind of protection circuit that car emergency startup power supply is docked with automobile starting battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822243873.1U CN209313470U (en) | 2018-12-29 | 2018-12-29 | A kind of protection circuit that car emergency startup power supply is docked with automobile starting battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209313470U true CN209313470U (en) | 2019-08-27 |
Family
ID=67679677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822243873.1U Active CN209313470U (en) | 2018-12-29 | 2018-12-29 | A kind of protection circuit that car emergency startup power supply is docked with automobile starting battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209313470U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030222A (en) * | 2019-12-19 | 2020-04-17 | 苏州妙益科技股份有限公司 | Current-limiting charging circuit of starting power supply protection board |
-
2018
- 2018-12-29 CN CN201822243873.1U patent/CN209313470U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030222A (en) * | 2019-12-19 | 2020-04-17 | 苏州妙益科技股份有限公司 | Current-limiting charging circuit of starting power supply protection board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208076672U (en) | A kind of relay adhesion detection circuit for electric vehicle | |
| CN103321814B (en) | Car emergency ignition installation | |
| CN104218532A (en) | Voltage protection circuit for frequency converter direct current (DC) bus | |
| CN207926209U (en) | Lithium battery pack charge-discharge protection circuit | |
| CN106059048B (en) | Electric connection accessory with direct current portable power source protection and instantaneous high-power output | |
| CN208001152U (en) | Battery protection device and load device | |
| CN209313470U (en) | A kind of protection circuit that car emergency startup power supply is docked with automobile starting battery | |
| CN205248853U (en) | Power supply circuit | |
| CN107688133A (en) | Control box has access to electricity short-circuit detecting circuit on charging gun cable | |
| CN204243735U (en) | A kind of lithium battery management system for electric car | |
| CN109245056A (en) | A kind of DC power source adapter protective device | |
| CN104600763A (en) | Under-voltage protection circuit and lamp | |
| CN204230865U (en) | A kind of motor protecting device | |
| CN208890635U (en) | A kind of new energy electromechanical testing energy bleeder | |
| CN208352955U (en) | A kind of short circuit protection device | |
| CN104459545A (en) | Control circuit and battery short circuit testing device including control circuit | |
| CN217282181U (en) | Direct current output protection circuit | |
| CN104065043B (en) | Battery under-voltage protection and display circuit | |
| CN204089173U (en) | A kind of frequency changer direct current bus voltage protection circuit | |
| CN211790843U (en) | Solar intelligent charging control device | |
| CN204205662U (en) | Car emergency starts power protection folder | |
| CN203352155U (en) | Microcomputer monitoring protecting device for current transformer | |
| CN207166126U (en) | EPS protector | |
| CN209541918U (en) | A kind of contactless temperature-measuring sensor | |
| CN204068359U (en) | There is the independent photovoltaic charge controller of multi-protective function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |