CN202888786U - Large power charger output reverse polarity protection circuit - Google Patents
Large power charger output reverse polarity protection circuit Download PDFInfo
- Publication number
- CN202888786U CN202888786U CN 201220517005 CN201220517005U CN202888786U CN 202888786 U CN202888786 U CN 202888786U CN 201220517005 CN201220517005 CN 201220517005 CN 201220517005 U CN201220517005 U CN 201220517005U CN 202888786 U CN202888786 U CN 202888786U
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- China
- Prior art keywords
- circuit
- output
- cpu control
- resistance
- charger
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- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present utility model discloses a large power charger output reverse polarity protection circuit. The circuit comprises a CPU control circuit and a switch circuit. The CPU control circuit is used for detecting difference between output voltage of a charger main circuit and voltage of a storage battery set, and outputting control signals to the charger main circuit and the switch circuit; and the switch circuit is used for receiving signals from the CPU control circuit and controlling on-off of a charging circuit. When the voltage difference is fitted with a condition for making impact current small, normal output of the charger main circuit is realized, and if the voltage difference is not fitted with the condition, then the voltage difference is adjusted to realize output. Impact current is effectively controlled by the circuit, and a charger can be prevented from being damaged by large impact current.
Description
Technical field
The utility model relates to a kind of charge protector, particularly a kind of high-power charger output antipole protective circuit.
Background technology
In the prior art, during general high-power charger output antipole protective circuit work, if anode links to each other with charger is anodal, namely just connect, then electric current flows to batteries through the drain electrode of field effect transistor; If anode links to each other with the charger negative pole, i.e. reversal connection, then electric current can not lead to the drain electrode of field effect transistor, thus the blocking-up electric current, protection charger main circuit is not burned.Generally charger main circuit output voltage is called interior pressure, the voltage of batteries is called external pressure; There is large electric capacity charger main circuit inside; owing to being subjected to the impact of interior pressure and external pressure pressure reduction, tend to produce excessive impulse current, thus the large fragile damage that causes the charger main circuit of electric capacity; contact switch in the while protective circuit, namely field effect transistor is also easily damaged.
Summary of the invention
For above-mentioned prior art, the technical problem that the utility model solves provides a kind of size that can control impulse current, the high-power charger output antipole protective circuit of protection charger.
For solving the problems of the technologies described above, the utility model proposes a kind of high-power charger output antipole protective circuit, this protective circuit is arranged between charger main circuit and the batteries, and this protective circuit comprises cpu control circuit and switching circuit; Wherein: the output of charger main circuit is connected with the input of described cpu control circuit, the input of switching circuit and the input of batteries respectively, and the output of described cpu control circuit is connected with the control input end of charger main circuit, the control input end of switching circuit respectively; The output of described switching circuit is connected with the input of batteries.
As a further improvement on the present invention, described switching circuit is by the second, the 4th, the 6th resistance, first, second electric capacity, and diode, triode and field effect transistor consist of; Wherein: the source electrode of described field effect transistor connects respectively the output of charger main circuit, the negative electrode of diode; The drain electrode of field effect transistor connects the input of batteries; The grid of field effect transistor is connected with the anode of diode, an end of the 4th resistance respectively; The collector electrode of the other end connecting triode of described the 4th resistance; The base stage of described triode is connected and is connected the second output of cpu control circuit behind the 5th resistance; Described the first electric capacity, the second resistance are connected in parallel between the source electrode and grid of field effect transistor, and the second electric capacity and the 6th resistance are connected in parallel between the base stage and emitter of described triode; The first input end of described cpu control circuit connects charger main circuit output by the first resistance, and the second input of described cpu control circuit is by the output of the 3rd resistance connecting valve circuit; The first output of cpu control circuit connects charger main circuit control input end.
Further improve as the present invention, field effect transistor is electromagnetic relay in the described switching circuit.
In a kind of high-power charger output antipole protective circuit that the utility model provides, cpu control circuit had both played detection effect, played again regulating action.Cpu control circuit can detect first the pressure reduction of the voltage of charger main circuit output voltage and batteries, and when pressure reduction meets control switching circuit conducting when making the little condition of impulse current, then the charger main circuit is normally exported; If ineligible, cpu control circuit control switch circuit turn-offs, and outputs a control signal to simultaneously the charger main circuit, and the charger main circuit is adjusted to and outputs to batteries after eligible again.This protective circuit has been controlled the size of impulse current effectively, and the protection charger does not damage because impulse current is excessive.
Description of drawings
Fig. 1 is a kind of high-power charger output antipole protective circuit figure.
Embodiment
Elaborate below in conjunction with the embodiment of accompanying drawing to a kind of high-power charger output antipole protective circuit of the present utility model.
As shown in Figure 1, a kind of high-power charger output antipole protective circuit of the present utility model, this protective circuit is arranged between charger main circuit and the batteries, and this protective circuit comprises cpu control circuit and switching circuit; Wherein: the output of charger main circuit is connected with the input of described cpu control circuit, the input of switching circuit and the input of batteries respectively, and the output of described cpu control circuit is connected with the control input end of charger main circuit, the control input end of switching circuit respectively; The output of described switching circuit is connected with the input of batteries.
Described switching circuit is by resistance R 2, R4, R6, capacitor C 1, C2, and diode ZD1, triode U2 and field effect transistor U1 consist of; Wherein: the source electrode of described field effect transistor U1 connects respectively the output of charger main circuit, the negative electrode of diode ZD1; The drain electrode of field effect transistor U1 connects the input of batteries; The grid of field effect transistor U1 is connected with the anode of diode ZD1, an end of resistance R 4 respectively; The collector electrode of the other end connecting triode U2 of described resistance R 4; The the second output Po2 that connects cpu control circuit behind the base series resistor R5 of described triode U2; Described capacitor C 1, resistance R 2 are connected in parallel between the source electrode and grid of field effect transistor U1, and capacitor C 2 and resistance R 6 are connected in parallel between the base stage and emitter of described triode U2; The first input end Pi1 of described cpu control circuit connects charger main circuit output by resistance R 1, and the second input Pi2 of described cpu control circuit is by the output of resistance R 3 connecting valve circuit; The first output Po1 of cpu control circuit connects charger main circuit control input end.
In the high-power charger output antipole protective circuit switching circuit of this programme, field effect transistor U1 also can be electromagnetic relay.
During circuit working, connect first batteries, then charger main circuit energising work.Charger main circuit output current flows to cpu control circuit after by resistance R 1, cpu control circuit detects the size of charger main circuit output voltage V i and accumulator battery voltage Vo by computing, if eligible Vi greater than the value of Vo in 0.3 ± 0.05V scope, then the Po2 output output HIGH voltage of cpu control circuit is to the switching circuit control input end, triode U2 conducting in the switching circuit, then field effect transistor U1 conducting, thereby charging circuit normal operation.If ineligible, then the Po1 output of cpu control circuit outputs a control signal to the charger main circuit, charger main circuit regulation output voltage, make it eligible Vi greater than the value of Vo after 0.3 ± 0.05V scope, charging circuit works again.When Vi when the value of Vo is in 0.3 ± 0.05V scope, charger main circuit output impulse current is very little, the contact switch in owner's electricity and the protective circuit of charging this moment can not damage.
The above has done detailed description to execution mode of the present utility model by reference to the accompanying drawings, but the utility model is not limited to above-mentioned execution mode, in the ken that those of ordinary skills possess, can also not break away under the prerequisite of aim of the present invention and make various variations.
Claims (3)
1. a high-power charger is exported the antipole protective circuit, and this protective circuit is arranged between charger main circuit and the batteries, it is characterized in that, this protective circuit comprises cpu control circuit and switching circuit; Wherein: the output of charger main circuit is connected with the input of described cpu control circuit, the input of switching circuit and the input of batteries respectively, and the output of described cpu control circuit is connected with the control input end of charger main circuit, the control input end of switching circuit respectively; The output of described switching circuit is connected with the input of batteries.
2. a kind of high-power charger according to claim 1 is exported the antipole protective circuit, it is characterized in that, described switching circuit is by the second, the 4th, the 6th resistance (R2, R4, R6), first, second electric capacity (C1, C2), diode (ZD1), triode (U2) and field effect transistor (U1) consist of; Wherein: the source electrode of described field effect transistor (U1) connects respectively the negative electrode of the output of charger main circuit, diode (ZD1); The drain electrode of field effect transistor (U1) connects the input of batteries; The grid of field effect transistor (U1) is connected with the anode of diode (ZD1), an end of the 4th resistance (R4) respectively; The collector electrode of the other end connecting triode (U2) of described the 4th resistance (R4); The base stage of described triode (U2) is connected and is connected second output (Po2) of cpu control circuit behind the 5th resistance (R5); Described the first electric capacity (C1), the second resistance (R2) are connected in parallel between the source electrode and grid of field effect transistor (U1), and the second electric capacity (C2) and the 6th resistance (R6) are connected in parallel between the base stage and emitter of described triode (U2); The first input end of described cpu control circuit (Pi1) connects charger main circuit output by the first resistance (R1), and second input (Pi2) of described cpu control circuit is by the output of the 3rd resistance (R3) connecting valve circuit; First output (Po1) of cpu control circuit connects charger main circuit control input end.
3. a kind of high-power charger output antipole protective circuit according to claim 1 is characterized in that, field effect transistor in the described switching circuit (U1) is electromagnetic relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220517005 CN202888786U (en) | 2012-10-10 | 2012-10-10 | Large power charger output reverse polarity protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220517005 CN202888786U (en) | 2012-10-10 | 2012-10-10 | Large power charger output reverse polarity protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202888786U true CN202888786U (en) | 2013-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220517005 Expired - Fee Related CN202888786U (en) | 2012-10-10 | 2012-10-10 | Large power charger output reverse polarity protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202888786U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730265A (en) * | 2016-01-21 | 2016-07-06 | 易事特集团股份有限公司 | Charging starting device for DC charging pile for electric automobile |
-
2012
- 2012-10-10 CN CN 201220517005 patent/CN202888786U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730265A (en) * | 2016-01-21 | 2016-07-06 | 易事特集团股份有限公司 | Charging starting device for DC charging pile for electric automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20141010 |
|
| EXPY | Termination of patent right or utility model |