CN204835611U - Electric vehicle charging protection device - Google Patents
Electric vehicle charging protection device Download PDFInfo
- Publication number
- CN204835611U CN204835611U CN201520552700.1U CN201520552700U CN204835611U CN 204835611 U CN204835611 U CN 204835611U CN 201520552700 U CN201520552700 U CN 201520552700U CN 204835611 U CN204835611 U CN 204835611U
- Authority
- CN
- China
- Prior art keywords
- voltage comparator
- voltage
- triode
- protection device
- electric vehicle
- 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.)
- Expired - Fee Related
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides an electric vehicle charging protection device, the device includes voltage comparater A1, voltage comparater A2, time relay KT1, time relay KT2, auxiliary relay KA and thermistor NTC, voltage comparater A1's anodal normally open contact 3a with auxiliary relay KA establish ties and then be connected with the charging wire, KT1's normally open contact 1a, NTC thermistor and KT2's parallelly connected back of normally open contact 2a and voltage comparater A1's negative pole are established ties, triode V1's base is connected to voltage comparater A1's output, and auxiliary relay KA is connected to triode V1's projecting pole, and voltage comparater A2's positive pole is connected to triode V1's collecting electrode, triode V2's base is connected to voltage comparater A2's output, and time relay KT2 is connected to triode V2's projecting pole. The utility model discloses need not change current charger, as long as it can realize time delay outage, overheated outage and be full of the outage function to increase protection device in charging loops, can effectively practice thrift the cost, raise the efficiency.
Description
Technical field
The utility model relates to electric motor car charge protection technical field, specifically a kind of charging protection device for electric vehicle.
Background technology
Today of growing interest environmental issue in the whole society, electric motor car is because it is easy to use, quick, efficient and environmental protection and be subject to the favor of increasing family and enterprises and institutions, and the application development of electric motor car is just becoming a kind of trend and trend.
But in actual use, there is various problem due to protection imperfection in the charging device of electric motor car, thus cause the generation of fire and personal injury in charging process, brings the loss that cannot retrieve to enterprise, family and individual.
Storage battery as electric motor car still cannot be full of all the time because cause for quality charges for a long time in unserviced situation, causes charging circuit overheated, very easily causes aging and breaking out of fire; And for example electric motor car storage battery summer or under airtight environment charging can cause again the overheated of charging device itself and breaking out of fire; And for example the storage battery of electric motor car can not power-off in time can cause the overshoot of storage battery to allow battery-heating, bulging even cause battery explosion after fully charging.
Invention, for the accident phenomenon easily caused in above-mentioned various charging, devises a kind of charge protection device of defencive function having timing, overheated power-off and be full of power-off, thus guarantees the safety in charging process.
Summary of the invention
The utility model provides a kind of charging protection device for electric vehicle, and its object is to increases delay cut-off, overheated power-off for existing charger and be full of power down function.
The technical solution of the utility model: a kind of charging protection device for electric vehicle, this device comprises voltage comparator A1, voltage comparator A2, time relay KT1, time relay KT2, auxiliary relay KA and thermistor NTC; Be connected with charging wire after the positive pole of described voltage comparator A1 and the normally opened contact 3a of auxiliary relay KA connect; Connect with the negative pole of voltage comparator A1 after the normally opened contact 2a parallel connection of the normally opened contact 1a of KT1, NTC thermistor and KT2; The base stage of the output connecting triode V1 of voltage comparator A1, the emitter of triode V1 connects auxiliary relay KA, and the collector electrode of triode V1 connects the positive pole of voltage comparator A2; The base stage of the output connecting triode V2 of voltage comparator A2, the emitter connect hours relay K T2 of triode V2.
Preferably, described charging protection device for electric vehicle also comprises switch S B1, SB2, and the normally opened contact 3a of time relay KA connects with SB2 with after SB1 parallel connection.
Preferably, described voltage comparator A1 and voltage comparator A2 all adopts LM399 voltage comparator.
Preferably, the positive pole of described voltage comparator A1 connects 12V voltage, and negative pole connects 14V voltage.
Preferably, the negative pole of described voltage comparator A2 connects 12V voltage through resistance R7, and the negative pole of voltage comparator A2 is through resistance R10 ground connection.
The beneficial effects of the utility model: the utility model need not be changed existing charger, can realize delay cut-off, overheated power-off as long as increase protective device in charge circuit and be full of power down function, can be effectively cost-saving, raise the efficiency.
Accompanying drawing explanation
Fig. 1 is the utility model electrical schematic diagram.
Embodiment
Be below a specific embodiment of the present utility model, be now described further by reference to the accompanying drawings.
As shown in Figure 1, a kind of charging protection device for electric vehicle, this device comprises voltage comparator A1, voltage comparator A2, time relay KT1, time relay KT2, auxiliary relay KA and thermistor NTC; The positive pole of described voltage comparator A1 is connected with 12V power supply after resistance R1 connects with the normally opened contact 3a of auxiliary relay KA; Connect with the negative pole of voltage comparator A1 after the normally opened contact 2a parallel connection of the normally opened contact 1a of KT1, NTC thermistor and KT2; The output of voltage comparator A1 is through the base stage of resistance R6 connecting triode V1, and the emitter of triode V1 connects auxiliary relay KA, and the collector electrode of triode V1 connects the positive pole of voltage comparator A2; The base stage of the output connecting triode V2 of voltage comparator A2, the emitter connect hours relay K T2 of triode V2.
In the present embodiment, described charging protection device for electric vehicle also comprises switch S B1, SB2, and the normally opened contact 3a of time relay KA connects with SB2 with after SB1 parallel connection.
Described voltage comparator A1 and voltage comparator A2 all adopts LM399 voltage comparator.
The positive pole of described voltage comparator A1 connects 12V voltage, and negative pole connects 14V voltage.
The positive pole of described voltage comparator A1 is through resistance R2 ground connection, and negative pole is through resistance R4 ground connection.
The negative pole of described voltage comparator A2 connects 12V voltage through resistance R7, and the negative pole of voltage comparator A2 is through resistance R10 ground connection.
Its operation principle is: be that reference voltage remains unchanged for the voltage of voltage comparator A1, A point, and B point voltage is external input voltage, if the voltage of B point is higher than the voltage of A point, so voltage comparator A1 output low level, V1 ends, and cuts off charge circuit.In like manner, for voltage comparator A2, if the voltage of C point is higher than the voltage of D point, so voltage comparator A2 output low level.
The utility model has timing, overheated power-off, is full of electric power-off and prevents charge circuit self-starting four kinds protection, below detailed division operation principle.
(1) timing protection
KT1 is a time relay, timing range is 0 ~ 99 hour, general timing is 9 hours, and the normally opened contact 1a of the timing closing of KT1 is connected on the B point binding post of A1, when after the time arriving setting, the normally opened contact of KT1 closes, B point introduces 14V voltage, higher than the voltage of A point, and voltage comparator A1 output low level 0, triode V1 ends, and disconnects charge circuit.
(2) overheated power-off protection
NTC is the thermistor of a negative temperature coefficient, under normal temperature, the resistance of resistance is very large, is equivalent to circuit and disconnects, work as temperature overheating, when reaching the operating temperature of thermistor (general optional actions temperature is the thermistor of 75 degree), the resistance of thermistor reduces rapidly, is equivalent to closing of circuit, and B point introduces 14V voltage, higher than the voltage of A point, voltage comparator A1 output low level 0, triode V1 is ended, and disconnects charge circuit;
(3) power-off protection is full of
What voltage comparator A2, D point accessed is charging voltage, and what C point was got involved is 12V voltage.After storage battery is full of electricity, the voltage of D point is higher than the voltage of C point, and voltage comparator A2 exports high level, triode V2 conducting, the coil of time relay KT2 obtains electric, after time delay after a while (time can sets itself), the normally opened contact 2a of KT2 closes, B point introducing 14V voltage, higher than A point voltage (A point voltage is 12V), voltage comparator A1 output low level, triode V1 ends, and disconnects charge circuit.
(4) prevent charge circuit self-starting from protecting
In order to prevent under certain conditions; charge circuit self-starting is (after overheated power-off protection; when ambient temperature reduces and charge circuit is started voluntarily) and the harm that brings; the coil of auxiliary relay KA is accessed in charge circuit; auxiliary relay KA coil is closed when storage battery charges; if because certain protection makes charge circuit disconnect; the coil losing electricity of auxiliary relay KA; its normally opened contact 3a disconnects; guarantee that the voltage of A point is less than B point voltage, make charge circuit be in off-state always.When re-using, as long as charge circuit is manually booted by switch S B1, SB2.
Claims (5)
1. a charging protection device for electric vehicle, is characterized in that: this device comprises voltage comparator A1, voltage comparator A2, time relay KT1, time relay KT2, auxiliary relay KA and thermistor NTC; Be connected with charging wire after the positive pole of described voltage comparator A1 and the normally opened contact 3a of auxiliary relay KA connect; Connect with the negative pole of voltage comparator A1 after the normally opened contact 2a parallel connection of the normally opened contact 1a of KT1, NTC thermistor and KT2; The base stage of the output connecting triode V1 of voltage comparator A1, the emitter of triode V1 connects auxiliary relay KA, and the collector electrode of triode V1 connects the positive pole of voltage comparator A2; The base stage of the output connecting triode V2 of voltage comparator A2, the emitter connect hours relay K T2 of triode V2.
2. a kind of charging protection device for electric vehicle according to claim 1, is characterized in that: described charging protection device for electric vehicle also comprises switch S B1, SB2, and the normally opened contact 3a of time relay KA connects with SB2 with after SB1 parallel connection.
3. a kind of charging protection device for electric vehicle according to claim 1, is characterized in that: described voltage comparator A1 and voltage comparator A2 all adopts LM399 voltage comparator.
4. a kind of charging protection device for electric vehicle according to claim 1, is characterized in that: the positive pole of described voltage comparator A1 connects 12V voltage, and negative pole connects 14V voltage.
5. a kind of charging protection device for electric vehicle according to claim 1, is characterized in that: the negative pole of described voltage comparator A2 connects 12V voltage through resistance R7, and the negative pole of voltage comparator A2 is through resistance R10 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520552700.1U CN204835611U (en) | 2015-07-28 | 2015-07-28 | Electric vehicle charging protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520552700.1U CN204835611U (en) | 2015-07-28 | 2015-07-28 | Electric vehicle charging protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204835611U true CN204835611U (en) | 2015-12-02 |
Family
ID=54693166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520552700.1U Expired - Fee Related CN204835611U (en) | 2015-07-28 | 2015-07-28 | Electric vehicle charging protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204835611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110901437A (en) * | 2019-12-13 | 2020-03-24 | 嵊州润雅电子科技有限公司 | Electric vehicle charging protection device based on insulator |
-
2015
- 2015-07-28 CN CN201520552700.1U patent/CN204835611U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110901437A (en) * | 2019-12-13 | 2020-03-24 | 嵊州润雅电子科技有限公司 | Electric vehicle charging protection device based on insulator |
| CN110901437B (en) * | 2019-12-13 | 2020-12-15 | 速珂智能科技（上海）有限公司 | Electric vehicle charging protection device based on insulator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103166202B (en) | System and method for reducing heating value in mobile terminal charging | |
| CN103413985B (en) | Environmental temperature-based quick charging method of lead-acid storage battery for electric motor car | |
| CN203839928U (en) | Lithium battery protection circuit | |
| CN104410139A (en) | Automatic power-off circuit and automatic power-off device for full storage battery of storage battery car | |
| CN104362595A (en) | Battery pack power supply circuit capable of achieving over-temperature protection | |
| CN204835611U (en) | Electric vehicle charging protection device | |
| CN208939568U (en) | A kind of servo-driver brake transistor and the protection circuit of bridge arm failure short circuit | |
| CN207967930U (en) | A kind of charger application circuit | |
| CN204681081U (en) | A kind of lithium electricity type solar street light is to lithium battery safe charging protective circuit | |
| CN204167880U (en) | Battery pack overheat protector power supply circuits | |
| CN202524069U (en) | Reverse-polarity protection circuit | |
| CN201112465Y (en) | Lead-acid accumulator with temperature and voltage protection | |
| CN204391837U (en) | Be suitable for the automatic power-off circuit of electric motor car charging and the electric motor car of this circuit is installed | |
| CN103414229A (en) | Electric vehicle charger with over-temperature protection function | |
| CN103633675B (en) | Battery charger polarity Adaptable System | |
| CN103633704B (en) | Prevent the photovoltaic charged circuit of PV reversal connection and raising charge efficiency | |
| CN204578149U (en) | A kind of intelligent cell phone charger | |
| CN204458174U (en) | A kind of high-power commercial car overheating of starter protective gear | |
| CN204290388U (en) | A kind of mobile phone over-charge protective device | |
| CN203103902U (en) | Microcomputer protection switching-on control loop | |
| CN214045431U (en) | Input capacitance slow charging circuit | |
| CN205693392U (en) | Automatically the charger circuit of accumulator polarity is identified | |
| CN205488400U (en) | High -power power battery management system of quick charge | |
| CN203787982U (en) | Photovoltaic charging circuit preventing PV inversed connection and improving charging efficiency | |
| CN205265229U (en) | Electrical load safety protection system |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20160728 |