CN205212423U - Protection circuit of electric motor car intelligent charging ware - Google Patents
Protection circuit of electric motor car intelligent charging ware Download PDFInfo
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- CN205212423U CN205212423U CN201521084585.6U CN201521084585U CN205212423U CN 205212423 U CN205212423 U CN 205212423U CN 201521084585 U CN201521084585 U CN 201521084585U CN 205212423 U CN205212423 U CN 205212423U
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Abstract
The utility model relates to a protection circuit of electric motor car intelligent charging ware, be 1N4148's catching diode D1 and D2 including the model, vin is held to the power input, 3 resistance R1, R2, R3, MCU input, the power input end vin be connected with resistance R1's one end, and resistance R1's the other end and resistance R3's one end are connected, and resistance R3's the other end is connected with the anodal of catching diode D1 respectively, is connected with catching diode D2's negative pole, is connected with the MCU input, the VDD for 5V in constant voltage is connected to catching diode D1's negative pole, the low connection is referred to to catching diode D2's anodal and circuit, resistance R1's the other end also with R2's one end is connected, and low the connection is referred to to R2's the other end and circuit. The utility model discloses inside has clamper protective diode, and its effect prevents follow external input's overtension or low excessively to reach the effect of protection MCU input check mouth.
Description
Technical field
The utility model relates to circuit protection field, specifically a kind of protective circuit of Intelligent charger for electric bicycle.
Background technology
At present, use MCU on the market to control the intelligent charger of charging process less, even if used MCU to control charging process, but to the protection of MCU itself do and not in place.Reason is, when the output of Intelligent charger for electric bicycle is connected with battery, in the process inserted or extract, likely produce electrostatic because of the contact friction of conducting metal, electrostatic is delivered to the input port of MCU by devices such as resistance, the damage of MCU port can be caused, thus cause the work of intelligent charger abnormal.
Utility model content
In view of this, in order to solve the problem, the utility model patent provides a kind of protective circuit of Intelligent charger for electric bicycle, carries out available protecting to the MCU of Intelligent charger for electric bicycle.
Concrete, comprise clamp diode D1 and D2, power input Vin, 3 resistance R1, R2, R3, MCU input;
Power input Vin is connected with one end of resistance R1, and the other end of resistance R1 is connected with one end of resistance R3, and the other end of resistance R3 is connected with the positive pole of clamp diode D1 respectively, is connected with the negative pole of clamp diode D2, is connected with MCU input; The negative pole of clamp diode D1 is connected to constant voltage VDD; The positive pole of described clamp diode D2 is connected with circuit reference ground;
The other end of resistance R1 is also connected with one end of described R2, and the other end of R2 is connected with circuit reference ground.
Further, the model of clamp diode D1 and D2 is 1N4148 diode.
Further, constant voltage VDD is 5V.
Beneficial effect:
The utility model inside has clamper protection diode, and its effect prevents the overtension or too low from outside input, thus reaches the effect that protection MCU input detects mouth.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, does not form restriction of the present utility model with embodiment one of the present utility model.In the accompanying drawings:
Fig. 1 is the protective circuit schematic diagram of a kind of Intelligent charger for electric bicycle of the utility model.
Embodiment
According to drawings and embodiments the utility model is described in further detail below.
The protective circuit of a kind of Intelligent charger for electric bicycle described in the present embodiment is as follows:
As shown in Figure 1, protective circuit comprises clamp diode D1 and D2 that model is 1N4148, power input Vin, 3 resistance R1, R2, R3, MCU input;
Power input Vin is connected with one end of resistance R1, and the other end of resistance R1 is connected with one end of resistance R3, and the other end of resistance R3 is connected with the positive pole of clamp diode D1 respectively, is connected with the negative pole of clamp diode D2, is connected with MCU input; The negative pole of clamp diode D1 is connected to the VDD that constant voltage is 5V; The positive pole of described clamp diode D2 is connected with circuit reference ground;
The other end of resistance R1 is also connected with one end of described R2, and the other end of R2 is connected with circuit reference ground.
Concrete, its method of operation is as follows:
Circuit carries out voltage clamping by these two diodes of D1 and D2, and the conduction voltage drop due to diode D1 and D2 is 0.7V.When the voltage by R3 is higher than 5.7V, D1 diode current flow, thus clamp the voltage at 5.7V.In like manner, when the voltage by R3 is lower than-0.7V, D2 diode current flow, thus clamp the voltage at-0.7V, thus play the effect that protection MCU input detects mouth.
The foregoing is only and execution mode of the present utility model is described; be not limited to the utility model; for a person skilled in the art; all within spirit of the present utility model and principle; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (3)
1. a protective circuit for Intelligent charger for electric bicycle, is characterized in that, comprising:
Clamp diode D1 and D2, power input Vin, 3 resistance R1, R2, R3, MCU input;
Described power input Vin is connected with one end of resistance R1, the other end of described resistance R1 is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the positive pole of described clamp diode D1 respectively, is connected with the negative pole of described clamp diode D2, is connected with described MCU input; The negative pole of described clamp diode D1 is connected to constant voltage VDD; The positive pole of described clamp diode D2 is connected with circuit reference ground;
The other end of described resistance R1 is also connected with one end of described R2, and the other end of described R2 is connected with circuit reference ground.
2. the protective circuit of a kind of Intelligent charger for electric bicycle according to claim 1, is characterized in that, the model of described clamp diode D1 and D2 is 1N4148 diode.
3. the protective circuit of a kind of Intelligent charger for electric bicycle according to claim 1, is characterized in that, described constant voltage VDD is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084585.6U CN205212423U (en) | 2015-12-23 | 2015-12-23 | Protection circuit of electric motor car intelligent charging ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084585.6U CN205212423U (en) | 2015-12-23 | 2015-12-23 | Protection circuit of electric motor car intelligent charging ware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205212423U true CN205212423U (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521084585.6U Expired - Fee Related CN205212423U (en) | 2015-12-23 | 2015-12-23 | Protection circuit of electric motor car intelligent charging ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205212423U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124841A (en) * | 2016-06-29 | 2016-11-16 | 无锡蕴能科技有限公司 | The fan testing circuit of a kind of Intelligent charger for electric bicycle and detection method |
| CN106208290A (en) * | 2016-08-31 | 2016-12-07 | 苏州迈力电器有限公司 | Charging circuit for electric motor car |
| CN106208337A (en) * | 2016-08-31 | 2016-12-07 | 苏州迈力电器有限公司 | Solar energy intelligent charger |
| CN106786454A (en) * | 2016-12-12 | 2017-05-31 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of active protection circuit of data signal |
| CN110212508A (en) * | 2019-05-15 | 2019-09-06 | 明基智能科技（上海）有限公司 | Over-current protection system |
| US11223199B2 (en) | 2019-05-17 | 2022-01-11 | Benq Corporation | Over current protection system having high operational endurance and capable of stabilizing voltages |
-
2015
- 2015-12-23 CN CN201521084585.6U patent/CN205212423U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124841A (en) * | 2016-06-29 | 2016-11-16 | 无锡蕴能科技有限公司 | The fan testing circuit of a kind of Intelligent charger for electric bicycle and detection method |
| CN106208290A (en) * | 2016-08-31 | 2016-12-07 | 苏州迈力电器有限公司 | Charging circuit for electric motor car |
| CN106208337A (en) * | 2016-08-31 | 2016-12-07 | 苏州迈力电器有限公司 | Solar energy intelligent charger |
| CN106786454A (en) * | 2016-12-12 | 2017-05-31 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of active protection circuit of data signal |
| CN110212508A (en) * | 2019-05-15 | 2019-09-06 | 明基智能科技（上海）有限公司 | Over-current protection system |
| CN110212508B (en) * | 2019-05-15 | 2021-09-10 | 明基智能科技（上海）有限公司 | Overcurrent protection system |
| US11223199B2 (en) | 2019-05-17 | 2022-01-11 | Benq Corporation | Over current protection system having high operational endurance and capable of stabilizing voltages |
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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: 20160504 Termination date: 20201223 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |