CN102593892A - Intelligent charging system of electric automobile - Google Patents
Intelligent charging system of electric automobile Download PDFInfo
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- CN102593892A CN102593892A CN2012100219749A CN201210021974A CN102593892A CN 102593892 A CN102593892 A CN 102593892A CN 2012100219749 A CN2012100219749 A CN 2012100219749A CN 201210021974 A CN201210021974 A CN 201210021974A CN 102593892 A CN102593892 A CN 102593892A
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- 238000005070 sampling Methods 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 22
- 230000000052 comparative effect Effects 0.000 claims description 18
- 238000007667 floating Methods 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention provides an intelligent charging system of an electric automobile. The intelligent charging system comprises a working voltage generation circuit, a reference voltage generation circuit, a comparator, a control circuit and an end-of-charge automatic turnoff circuit, wherein the working voltage generation circuit is used for sampling charging current of a charging device and generating a working voltage which represents the sampled charging current; the reference voltage generation circuit is used for automatically turning off a reference voltage of the charging device in the float charge period of the electric automobile after the termination of charge; the comparator is used for comparing the reference voltage with the working voltage and sending a comparison result to the control circuit; the control circuit is used for controlling the end-of-charge automatic turnoff circuit to turn off the charging device when the comparison result shows that the working voltage is less than the reference voltage; and the end-of-charge automatic turnoff circuit is used for turning off the charging device under the control of the control circuit. According to the intelligent charging system of the electric automobile, the charging device can be timely turned off in the float charge period after the termination of charge, so that unnecessary energy loss in the charging device during the float charge period is saved, and the purpose of saving energy is achieved.
Description
Technical field
The present invention relates to the electric vehicle engineering field, relate in particular to a kind of electric automobile intelligent charge system.
Background technology
In present charging electric vehicle technology, charging electric vehicle is divided into constant current, constant voltage and floating charge three phases basically, and wherein, the floating charge stage is the hold mode that battery charge finishes.The reason that has the floating charge stage is that charging device can't stop charging at once, has so just caused the unnecessary energy loss of charging device.The floating charge stage is long more, and the unnecessary energy of loss is many more in the charging device.Therefore, ideal situation is, finishes to make charging device complete charge as early as possible after the back gets into the floating charge stage in charging, that is, make the floating charge stage short as much as possible, thereby reduce or avoid the unnecessary energy loss that the floating charge stage is caused in charging device.
Summary of the invention
In order to address the above problem; The present invention provides a kind of electric automobile intelligent charge system; Automatically shut down charging device so that charging device finishes the back in charging in time after the entering floating charge stage, thereby reduce or avoid the unnecessary energy loss that the floating charge stage is caused in charging device.
In order to realize above purpose, electric automobile intelligent charge provided by the invention system comprises: working volt produce circuit, and it is used for the charging current of charging device is sampled, and produces the operating voltage that characterizes the charging current of being sampled; Reference voltage generating circuit, it is used to be arranged so that the reference voltage that after charging electric vehicle finishes, automatically shuts down said charging device after the entering floating charge stage; Comparator, it is used for the operating voltage of the reference voltage of said reference voltage generating circuit setting and the generation of said working volt produce circuit is compared, and comparative result is sent to control circuit; Control circuit, it is used for when said comparative result shows that said operating voltage is lower than said reference voltage, and the control charging finishes automatic shutdown circuitry and turn-offs said charging device; Charging finishes automatic shutdown circuitry, and it is used for turn-offing said charging device according to the control of said control circuit.
Preferably; Said working volt produce circuit and reference voltage generating circuit comprise: loosely coupled transformer; Its elementary winding and the coupling of said charging device, its first secondary winding is connected with the charging current sample circuit, offers said charging current sample circuit with the charging current with said charging device; Its second subprime winding is connected with reference circuit, offers said reference circuit with the output voltage with said second subprime winding; The charging current sample circuit, it is used to produce the operating voltage that characterizes said charging current; Reference circuit, it is used for producing said reference voltage according to the output voltage of said second subprime winding.
Preferably, said charging current sample circuit comprises a sampling resistor.
Preferably, said reference circuit comprises: rectification circuit, and it is used for the output voltage of said second subprime winding is carried out rectification; Voltage stabilizing circuit, it is used to make the voltage after the rectification to form burning voltage; Voltage divider, it is used for said burning voltage is carried out dividing potential drop, to form said reference voltage.
Preferably, said rectification circuit comprises a rectifier diode, and said voltage stabilizing circuit comprises a voltage stabilizing didoe.
Preferably, said charging end automatic shutdown circuitry comprises a switch.
Preferably, said electric automobile intelligent charge system also comprises: wireless transmission circuit, and it is used to receive the comparative result of said comparator, and said comparative result is sent to wireless receiving circuit; Wireless receiving circuit, it is used to receive said comparative result, and said comparative result is sent to said control circuit.
Through electric automobile intelligent charge system proposed by the invention; Make charging device finish the back and automatically shut down charging device in time after the entering floating charge stage in charging; Thereby saved the unnecessary energy loss that the floating charge stage is caused in charging device, reached purpose of energy saving.
Description of drawings
Fig. 1 is the structured flowchart of the electric automobile intelligent charge system of the first embodiment of the present invention;
Fig. 2 is the structured flowchart of the electric automobile intelligent charge system of the second embodiment of the present invention;
Fig. 3 is the circuit theory diagrams of the exemplary electrical electrical automobile intelligent charge system of the second embodiment of the present invention.
Embodiment
Below, will present invention is described with reference to accompanying drawing and embodiment.
Fig. 1 is the structured flowchart of the electric automobile intelligent charge system of the first embodiment of the present invention.As shown in Figure 1, the electric automobile intelligent charge system of first embodiment comprises that working volt produce circuit, reference voltage generating circuit, comparator, control circuit and charging finish automatic shutdown circuitry.Wherein, working volt produce circuit is used for the charging current of charging device is sampled, and produces the operating voltage that characterizes the charging current of being sampled.Reference voltage generating circuit is used to be arranged so that the reference voltage that after charging electric vehicle finishes, automatically shuts down charging device after the entering floating charge stage.Comparator is used for the operating voltage of the reference voltage of reference voltage generating circuit setting and working volt produce circuit generation is compared, and comparative result is sent to control circuit.Control circuit is used for when comparative result shows that operating voltage is lower than reference voltage, and the control charging finishes automatic shutdown circuitry and turn-offs charging device.Charging finishes automatic shutdown circuitry and is used for turn-offing charging device according to the control of control circuit.
Fig. 2 is the structured flowchart of the electric automobile intelligent charge system of the second embodiment of the present invention.As shown in Figure 2, the difference of the present embodiment and first embodiment is to have increased wireless communication function, specifically, has increased wireless transmission circuit and wireless receiving circuit.Wherein, wireless transmission circuit is used to receive the comparative result of comparator, and this comparative result is sent to wireless receiving circuit, and wireless receiving circuit is used to receive this comparative result, and this comparative result is sent to control circuit.
Fig. 3 is the circuit theory diagrams of the exemplary electrical electrical automobile intelligent charge system of the second embodiment of the present invention.
As shown in Figure 3, working volt produce circuit and reference voltage generating circuit are realized through a loosely coupled transformer T jointly.Specifically, in this example, working volt produce circuit and reference voltage generating circuit comprise loosely coupled transformer (T), charging current sample circuit and reference circuit.Wherein, The elementary winding of loosely coupled transformer T and charging device are (promptly; Input circuit shown in Fig. 2) coupling, its first secondary winding (N1) is connected with the charging current sample circuit, offers the charging current sample circuit with the charging current with charging device; Its second subprime winding (N2) is connected with reference circuit, offers reference circuit with the output voltage with second subprime winding (N2).The charging current sample circuit is used to produce the operating voltage that characterizes said charging current.Reference circuit is used for producing reference voltage according to the output voltage of second subprime winding (N2).
As shown in Figure 3, the charging current sample circuit mainly comprises a sampling resistor (R2).Reference circuit comprises rectification circuit, voltage stabilizing circuit and voltage divider.Wherein, rectification circuit mainly comprises rectifier diode D1, is used for the output voltage of second subprime winding (N2) is carried out rectification.Voltage stabilizing circuit mainly comprises voltage stabilizing didoe D2, is used to make the voltage after the rectification to form burning voltage.Voltage divider comprises resistance R 4 and R5, is used for said burning voltage is carried out dividing potential drop, to form said reference voltage.
The operation principle of circuit shown in Figure 3 is following: when the charging beginning, manual closing is often opened button AN1, time relay KT energising, and normally opened contact KT-NO is closed, circuit working.The first secondary winding N1 of loosely coupled transformer T is main output winding, for load provides charging current.Second subprime winding N2 is mainly comparator IC1 operating voltage is provided.Behind the circuit working, the output current sampling resistor R2 that flows through produces sampled voltage on R2, and this sampled voltage is sent to the inverting input of voltage comparator ic 1.Second subprime winding N2 output voltage forms stable voltage at voltage stabilizing didoe D2 two ends after diode D1 rectification.The in-phase input end of voltage comparator ic 1 delivered to the reference voltage of comparison circuit by voltage divider via R4, R5 composition.Through this reference voltage numerical value is set, can control cut-off current.When the electric current of input circuit is reduced to certain numerical value, because the electric current of the R2 that flows through reduces, the sampled voltage on R2 will be lower than reference voltage; The in-phase input end voltage that is voltage comparator will be higher than inverting input voltage; Comparator output high level breaks off charging and finishes automatic shutdown circuitry (that is switch Q1) to control circuit; KT outage and normally opened contact KT-NO opens makes whole charging device get into power-down mode.
Through above-mentioned electric automobile intelligent charge system; Can make charging device finish the back and automatically shut down charging device in time after the entering floating charge stage in charging; Thereby saved the unnecessary energy loss that the floating charge stage is caused in charging device, reached purpose of energy saving.
In addition, point out that electric automobile intelligent charge of the present invention system also can likewise carry out overcurrent and short-circuit protection through reference voltage is set.
Below with reference to accompanying drawing and embodiment the present invention is described in detail, still, should be appreciated that, the present invention is not limited to above disclosed exemplary embodiment.Should give claim to explain the most widely, to contain all modification, equivalent structure and the function of disclosed exemplary embodiment.
Claims (7)
1. electric automobile intelligent charge system comprises:
Working volt produce circuit, it is used for the charging current of charging device is sampled, and produces the operating voltage that characterizes the charging current of being sampled;
Reference voltage generating circuit, it is used to be arranged so that the reference voltage that after charging electric vehicle finishes, automatically shuts down said charging device after the entering floating charge stage;
Comparator, it is used for the operating voltage of the reference voltage of said reference voltage generating circuit setting and the generation of said working volt produce circuit is compared, and comparative result is sent to control circuit;
Control circuit, it is used for when said comparative result shows that said operating voltage is lower than said reference voltage, and the control charging finishes automatic shutdown circuitry and turn-offs said charging device;
Charging finishes automatic shutdown circuitry, and it is used for turn-offing said charging device according to the control of said control circuit.
2. electric automobile intelligent charge according to claim 1 system is characterized in that said working volt produce circuit and reference voltage generating circuit comprise:
Loosely coupled transformer; Its elementary winding and the coupling of said charging device; Its first secondary winding is connected with the charging current sample circuit; Offer said charging current sample circuit with the charging current with said charging device, its second subprime winding is connected with reference circuit, offers said reference circuit with the output voltage with said second subprime winding;
The charging current sample circuit, it is used to produce the operating voltage that characterizes said charging current;
Reference circuit, it is used for producing said reference voltage according to the output voltage of said second subprime winding.
3. electric automobile intelligent charge according to claim 2 system is characterized in that said charging current sample circuit comprises a sampling resistor.
4. electric automobile intelligent charge according to claim 2 system is characterized in that said reference circuit comprises:
Rectification circuit, it is used for the output voltage of said second subprime winding is carried out rectification;
Voltage stabilizing circuit, it is used to make the voltage after the rectification to form burning voltage;
Voltage divider, it is used for said burning voltage is carried out dividing potential drop, to form said reference voltage.
5. electric automobile intelligent charge according to claim 4 system is characterized in that said rectification circuit comprises a rectifier diode, and said voltage stabilizing circuit comprises a voltage stabilizing didoe.
6. electric automobile intelligent charge according to claim 1 system is characterized in that, said charging finishes automatic shutdown circuitry and comprises a switch.
7. electric automobile intelligent charge according to claim 1 system is characterized in that, also comprises:
Wireless transmission circuit, it is used to receive the comparative result of said comparator, and said comparative result is sent to wireless receiving circuit;
Wireless receiving circuit, it is used to receive said comparative result, and said comparative result is sent to said control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210021974.9A CN102593892B (en) | 2012-01-31 | 2012-01-31 | Intelligent charging system of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210021974.9A CN102593892B (en) | 2012-01-31 | 2012-01-31 | Intelligent charging system of electric automobile |
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| Publication Number | Publication Date |
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| CN102593892A true CN102593892A (en) | 2012-07-18 |
| CN102593892B CN102593892B (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210021974.9A Active CN102593892B (en) | 2012-01-31 | 2012-01-31 | Intelligent charging system of electric automobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560551A (en) * | 2013-10-09 | 2014-02-05 | 奇瑞汽车股份有限公司 | Prompt circuit used when charging of vehicle-mounted mobile phone wireless charger is completed |
| CN103607007A (en) * | 2013-11-18 | 2014-02-26 | 奇瑞汽车股份有限公司 | Wireless charging emission circuit |
| CN105109358A (en) * | 2015-09-22 | 2015-12-02 | 奇瑞汽车股份有限公司 | Wireless charging system of electric automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090058369A1 (en) * | 2007-08-31 | 2009-03-05 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd | Battery charging circuit |
| CN201781310U (en) * | 2010-04-29 | 2011-03-30 | 比亚迪股份有限公司 | Battery charge control circuit |
| CN201985596U (en) * | 2011-04-28 | 2011-09-21 | 奇瑞汽车股份有限公司 | Wireless charging system for electric automobile |
-
2012
- 2012-01-31 CN CN201210021974.9A patent/CN102593892B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090058369A1 (en) * | 2007-08-31 | 2009-03-05 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd | Battery charging circuit |
| CN201781310U (en) * | 2010-04-29 | 2011-03-30 | 比亚迪股份有限公司 | Battery charge control circuit |
| CN201985596U (en) * | 2011-04-28 | 2011-09-21 | 奇瑞汽车股份有限公司 | Wireless charging system for electric automobile |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560551A (en) * | 2013-10-09 | 2014-02-05 | 奇瑞汽车股份有限公司 | Prompt circuit used when charging of vehicle-mounted mobile phone wireless charger is completed |
| CN103607007A (en) * | 2013-11-18 | 2014-02-26 | 奇瑞汽车股份有限公司 | Wireless charging emission circuit |
| CN103607007B (en) * | 2013-11-18 | 2015-12-02 | 奇瑞汽车股份有限公司 | A kind of wireless charging radiating circuit |
| CN105109358A (en) * | 2015-09-22 | 2015-12-02 | 奇瑞汽车股份有限公司 | Wireless charging system of electric automobile |
| CN105109358B (en) * | 2015-09-22 | 2018-05-11 | 奇瑞汽车股份有限公司 | A kind of wireless charging system for electric automobile |
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| Publication number | Publication date |
|---|---|
| CN102593892B (en) | 2014-10-01 |
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