CN206807047U - A kind of charging gun protection circuit of two-in-one mode - Google Patents
A kind of charging gun protection circuit of two-in-one mode Download PDFInfo
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- CN206807047U CN206807047U CN201720402956.3U CN201720402956U CN206807047U CN 206807047 U CN206807047 U CN 206807047U CN 201720402956 U CN201720402956 U CN 201720402956U CN 206807047 U CN206807047 U CN 206807047U
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Abstract
The utility model discloses a kind of charging gun protection circuit of two-in-one mode, including circuit board, the input connection power generating facilities and power grids output end of the circuit board, the circuit board is provided with relay, overvoltage/undervoltage detects circuit, control circuit, the input of the power generating facilities and power grids output end and relay connects, the output end of the relay is connected with the input of overvoltage/undervoltage detection circuit, the output end of the overvoltage/undervoltage detection circuit and the input of control circuit connect, the output end output overvoltage/undervoltage detection signal and relay contact adhesion detection signal of the overvoltage/undervoltage detection circuit.The utility model detects the output end of relay directly as overvoltage/undervoltage the input of circuit, after overvoltage detection circuit, its output end voltage is detected it may determine that going out overvoltage/undervoltage and relay contact adhesion both malfunctions, eliminate single relay anti-adhesion circuit, both circuit element cost had been saved, also reduce the complexity of circuit so that technique is simpler.
Description
Technical field
Charging gun protection circuit is the utility model is related to, electricity is protected more particularly to a kind of charging gun of two-in-one mode
Road.
Background technology
In existing charging gun, overvoltage/undervoltage detection both circuit and relay anti-adhesion protection circuit are separately to be protected
, work independently, be independent of each other.Overvoltage/undervoltage detection circuit be used for detect voltage ripple of power network whether normal voltage 220V ±
In the range of 15%, corresponding safeguard measure otherwise will be performed.And relay anti-adhesion protection circuit is then to be used to detect relay
Whether be also at closure state when charging gun is not in normal operation, i.e. contact whether adhesion, once adhesion can cause
Alternating current exists always, makes system control failure and buries potential safety hazard.
Detection protection is carried out respectively using overvoltage/undervoltage detection two circuits of circuit and relay anti-adhesion protection circuit, and it is led
To want shortcoming be that circuit element used is more, and one causes to waste, and two to cause circuit level to reduce, cost increase；And two
The input of individual circuit is all the output voltage at electric network source end, and its testing result is after processing respectively as the defeated of control unit
Enter signal, then control unit sends control signal accordingly, to carry out corresponding protection act to circuit in time.Two such electricity
Road output just needs to take two pins of control chip, not enough divides if having and chip pin may being may result in during New function addition
Match somebody with somebody, the difficulty for causing circuit to upgrade.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is that the charging gun for providing a kind of two-in-one mode is protected
Protection circuit.
The utility model is that technical scheme is used by solving its problem：
A kind of charging gun protection circuit of two-in-one mode, including circuit board, the input connection power supply of the circuit board
Power network output end, the circuit board are provided with relay, overvoltage/undervoltage detection circuit, control circuit, the power generating facilities and power grids output end
It is connected with the input of relay, the output end of the relay is connected with the input of overvoltage/undervoltage detection circuit, described excessively deficient
The output end of pressure detection circuit and the input of control circuit connect, the output end output overvoltage/undervoltage of the overvoltage/undervoltage detection circuit
Detection signal and relay contact adhesion detection signal.
Further, the control circuit is provided with A/D converters and control chip, and the overvoltage/undervoltage detects the defeated of circuit
Go out end to be connected with the input of A/D converters, the output end of the A/D converters and the input of control chip connect, described
A/D converters are believed after overvoltage/undervoltage detection signal and the processing of relay contact adhesion detection signal as the input of control chip
Number.
Further, the input signal is touched including normal work signal, overvoltage signal, brownout signal, relay
Point adhesion signal.
Further, when the power generating facilities and power grids output end voltage is higher than the 15% of 220 volts, input signal is overvoltage signal；
When the power generating facilities and power grids output end voltage is less than the 15% of 220 volts, input signal is brownout signal；The power generating facilities and power grids output
When terminal voltage is no more than ± the 15% of 220 volts, input signal is normal work signal；It is defeated when contact adhesion occurs for the relay
It is relay contact adhesion signal to enter signal.
Further, the output end of the relay is provided with live wire and zero line, the live wire and zero line respectively with overvoltage/undervoltage
Detect the input connection of circuit.
Further, the overvoltage/undervoltage detection circuit is provided with division module, rectification module, voltage reduction module, operation amplifier
Module, Voltage stabilizing module, the input of the output end connection rectification module of the division module, the output end of the rectification module connect
Connect the input of voltage reduction module, the input of the output end operational amplifying module of the voltage reduction module, the operational amplifying module
Output end connection Voltage stabilizing module input.
Further, the division module is provided with resistance R42 and resistance R45 for partial pressure, the output of the resistance R42
End connection resistance R45 input.
Further, the rectification module is provided with the diode D13 for rectification.
Further, the voltage reduction module is provided with resistance R43, resistance R44 and resistance R46 for being depressured, the resistance
R43 output end connection resistance R44 input, the output end connection resistance R46 of resistance R44 input.
Further, the operational amplifying module, which is provided with, is used to realize voltage follow and the operational amplifier U10B isolated,
The input of the operational amplifier U10B includes first input end and the second input, the output of the operational amplifier U10B
End and first input end feedback link, second input connect voltage reduction module.
The beneficial effects of the utility model are：A kind of charging gun protection electricity for two-in-one mode that the utility model uses
Road, contact relay is only needed in electric network source output end, without taking over undervoltage detection circuit again so that technique is simpler；Relay
Output end directly as overvoltage/undervoltage detect circuit input, after overvoltage detection circuit, detect its output end voltage
It may determine that going out overvoltage/undervoltage and relay contact adhesion both malfunctions, single relay anti-adhesion electricity is eliminated
Road, circuit element is both saved, saved cost, also reduced the complexity of circuit so that technique is simpler, also improves electricity
The integrated level on road.
Brief description of the drawings
Fig. 1 is integrated circuit schematic diagram of the present utility model；
Fig. 2 is overvoltage/undervoltage detection schematic block circuit diagram of the present utility model；
Fig. 3 is overvoltage/undervoltage detection circuit diagram of the present utility model.
Embodiment
The utility model is described in further detail with example below in conjunction with the accompanying drawings.
As Figure 1-3, the utility model provides a kind of charging gun protection circuit of two-in-one mode, including circuit board,
The input connection power generating facilities and power grids output end of circuit board, circuit board are provided with relay, overvoltage/undervoltage detection circuit, control circuit,
The input of power generating facilities and power grids output end and relay connects, and the output end and the input of overvoltage/undervoltage detection circuit of relay connect
Connect, the output end of overvoltage/undervoltage detection circuit and the input of control circuit connect, and the output end of overvoltage/undervoltage detection circuit exported
Brown-out detection signal and relay contact adhesion detection signal, control circuit are glued according to overvoltage/undervoltage detection signal and relay contact
Even detection signal judges that circuit is in overvoltage/undervoltage state or relay contact adhesion state, and sends corresponding control and refer to
Order, performs corresponding protection act.
In the present embodiment, control circuit is provided with A/D converters and control chip, the output end of overvoltage/undervoltage detection circuit with
The input connection of A/D converters, the output end of A/D converters and the input of control chip connect, and A/D converters will be excessively deficient
Input signal after pressure detection signal and the processing of relay contact adhesion detection signal as control chip.
Input signal includes normal work signal, overvoltage signal, brownout signal, relay contact adhesion signal.
When power generating facilities and power grids output end voltage is higher than the 15% of 220 volts, input signal is overvoltage signal；Power generating facilities and power grids export
When terminal voltage is less than the 15% of 220 volts, input signal is brownout signal；Power generating facilities and power grids output end voltage no more than 220 volts ±
When 15%, input signal is normal work signal；When contact adhesion occurs for relay, input signal is believed for relay contact adhesion
Number.
The output end of relay is provided with live wire and zero line, and the input of live wire and zero line respectively with overvoltage/undervoltage detection circuit connects
Connect.
Overvoltage/undervoltage detection circuit is provided with division module, rectification module, voltage reduction module, operational amplifying module, Voltage stabilizing module,
The input of the output end connection rectification module of division module, the input of the output end connection voltage reduction module of rectification module, drop
The input of the output end operational amplifying module of die block, the input of the output end connection Voltage stabilizing module of operational amplifying module.
Division module is provided with resistance R42 and resistance R45 for partial pressure, and resistance R42 output end connection resistance R45's is defeated
Enter end.
Rectification module is provided with the diode D13 for rectification.
Voltage reduction module is provided with resistance R43, resistance R44 and resistance R46 for being depressured, resistance R43 output end connection electricity
Hinder R44 input, resistance R44 output end connection resistance R46 input.
Operational amplifying module, which is provided with, to be used to realize voltage follow and the operational amplifier U10B isolated, operational amplifier U10B
Input include first input end and the second input, operational amplifier U10B output end and first input end feedback connect
Connect, the second input connection voltage reduction module.
When it is implemented, the output end relay（That is live wire L and zero line N）Input as overvoltage/undervoltage detection circuit
End, then OUTPUT, the i.e. knot of overvoltage/undervoltage detection and relay anti-adhesion detection are obtained by output end after overvoltage/undervoltage detection circuit
Fruit.Input signals of the OUTPUT after A/D converters as control chip, control chip can be according to the input signals
Value, namely the size of magnitude of voltage, judge that circuit is in normal operating conditions, overvoltage condition, under-voltage state, relay and touched
Any one in point adhesion state, and sends corresponding control instruction, performs corresponding protection act, with protection circuit not by
Influence or eliminate danger.
Overvoltage/undervoltage detection circuit inner workings are as follows：Partial pressure, commutation diode are carried out by divider resistance R42, R45
D13 carries out rectification, and dropping resistor R43, R44 and R46 are depressured, voltage are reduced in the range of 0~3.3V；Pass through fortune again
Calculating amplifier U10B realizes voltage follow with isolating；Current-limiting resistance R41 and voltage stabilizing of the operational amplifier U10B output through being followed by
After diode D14 carries out voltage stabilizing, OUTPUT, i.e. overvoltage/undervoltage detection and relay are just obtained in the output end of overvoltage/undervoltage detection circuit
Prevent adhesion the result of detection.
Fluctuated up and down not it should be noted that the voltage request of charging gun equipment normal work is power network normal voltage 220V
± 15% must be higher than, be overvoltage condition higher than 15%, be under-voltage state less than 15%, be situated between in the range of between the two then
For normal operating conditions；If for charging gun not in working condition, output end detects that output voltage is not zero, then illustrates relay
Contact adhesion.
Described above, simply preferred embodiment of the present utility model, the utility model is not limited to above-mentioned implementation
Mode, as long as it reaches technique effect of the present utility model with identical means, it should all belong to the scope of protection of the utility model.
Claims (10)
1. a kind of charging gun protection circuit of two-in-one mode, including circuit board, the input connection power supply electricity of the circuit board
Net output end, it is characterised in that：The circuit board is provided with relay, overvoltage/undervoltage detection circuit, control circuit, the power supply electricity
The input of net output end and relay is connected, and the output end of the relay is connected with the input of overvoltage/undervoltage detection circuit,
The output end of the overvoltage/undervoltage detection circuit and the input of control circuit connect, and the output end of the overvoltage/undervoltage detection circuit is defeated
Go out overvoltage/undervoltage detection signal and relay contact adhesion detection signal.
A kind of 2. charging gun protection circuit of two-in-one mode according to claim 1, it is characterised in that：The control electricity
Road is provided with A/D converters and control chip, and the output end and the input of A/D converters of the overvoltage/undervoltage detection circuit connect
Connect, the input of the output ends of the A/D converters and control chip connects, and the A/D converters are by overvoltage/undervoltage detection signal
With the input signal after the processing of relay contact adhesion detection signal as control chip.
A kind of 3. charging gun protection circuit of two-in-one mode according to claim 2, it is characterised in that：The input letter
Number include normal work signal, overvoltage signal, brownout signal, relay contact adhesion signal.
A kind of 4. charging gun protection circuit of two-in-one mode according to claim 3, it is characterised in that：The power supply electricity
When net output end voltage is higher than the 15% of 220 volts, input signal is overvoltage signal；The power generating facilities and power grids output end voltage is less than
220 volts 15% when, input signal is brownout signal；When the power generating facilities and power grids output end voltage is no more than ± the 15% of 220 volts,
Input signal is normal work signal；When contact adhesion occurs for the relay, input signal is relay contact adhesion signal.
A kind of 5. charging gun protection circuit of two-in-one mode according to claim 1, it is characterised in that：The relay
Output end be provided with live wire and zero line, the input of the live wire and zero line respectively with overvoltage/undervoltage detection circuit is connected.
A kind of 6. charging gun protection circuit of two-in-one mode according to claim 1, it is characterised in that：The overvoltage/undervoltage
Detection circuit is provided with division module, rectification module, voltage reduction module, operational amplifying module, Voltage stabilizing module, the division module
Output end connects the input of rectification module, the input of the output end connection voltage reduction module of the rectification module, the decompression
The input of the output end operational amplifying module of module, the input of the output end connection Voltage stabilizing module of the operational amplifying module
End.
A kind of 7. charging gun protection circuit of two-in-one mode according to claim 6, it is characterised in that：The partial pressure mould
Block is provided with the input for the resistance R42 of partial pressure and resistance R45, the resistance R42 output end connection resistance R45.
A kind of 8. charging gun protection circuit of two-in-one mode according to claim 6, it is characterised in that：The rectification mould
Block is provided with the diode D13 for rectification.
A kind of 9. charging gun protection circuit of two-in-one mode according to claim 6, it is characterised in that：The decompression mould
Block is provided with the output end connection resistance R44 of resistance R43, the resistance R44 and resistance R46, the resistance R43 for being depressured input
End, the output end connection resistance R46 of resistance R44 input.
A kind of 10. charging gun protection circuit of two-in-one mode according to claim 6, it is characterised in that：The computing
Amplification module, which is provided with, to be used to realize voltage follow and the operational amplifier U10B isolated, the input of the operational amplifier U10B
Including first input end and the second input, output end and the first input end feedback link of the operational amplifier U10B, institute
State the second input connection voltage reduction module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720402956.3U CN206807047U (en) | 2017-04-14 | 2017-04-14 | A kind of charging gun protection circuit of two-in-one mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720402956.3U CN206807047U (en) | 2017-04-14 | 2017-04-14 | A kind of charging gun protection circuit of two-in-one mode |
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| Publication Number | Publication Date |
|---|---|
| CN206807047U true CN206807047U (en) | 2017-12-26 |
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ID=60733081
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720402956.3U Active CN206807047U (en) | 2017-04-14 | 2017-04-14 | A kind of charging gun protection circuit of two-in-one mode |
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| CN (1) | CN206807047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470897A (en) * | 2019-07-19 | 2019-11-19 | 苏州浪潮智能科技有限公司 | A kind of under-voltage detection device and method with clamper feedback function |
-
2017
- 2017-04-14 CN CN201720402956.3U patent/CN206807047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470897A (en) * | 2019-07-19 | 2019-11-19 | 苏州浪潮智能科技有限公司 | A kind of under-voltage detection device and method with clamper feedback function |
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| GR01 | Patent grant |