CN202737552U - Constant-current constant-voltage control integrated circuit of electric vehicle charger - Google Patents
Constant-current constant-voltage control integrated circuit of electric vehicle charger Download PDFInfo
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- CN202737552U CN202737552U CN 201220211607 CN201220211607U CN202737552U CN 202737552 U CN202737552 U CN 202737552U CN 201220211607 CN201220211607 CN 201220211607 CN 201220211607 U CN201220211607 U CN 201220211607U CN 202737552 U CN202737552 U CN 202737552U
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Abstract
The utility model belongs to the technical field of integrated circuit, in particular to a constant-current constant-voltage control integrated circuit of an electric vehicle charger. A built-in reference voltage source sets the reference voltage of a current loop and a voltage loop, the current loop controls the charging current to realize the initial constant-current charging, and the voltage loop controls the charging voltage to realize the later-stage constant-voltage charging, and the charger state indication function is added. The constant-current constant-voltage function is realized by the new integrated circuit in replacement of an amplification amplifier, a precise reference power source and a large amount of discrete devices, thus the complexity degree of the periphery circuit is greatly simplified and the cost of the electric vehicle charger is reduced.
Description
Technical field
The utility model relates to integrated circuit fields, specifically the constant current constant voltage control integration circuit of electric car charger.
Background technology
Become increasingly conspicuous the focus that electrically driven vehicle becomes again auto industry research, exploitation and uses along with the development of modern high technology and world today's environment, the energy two hang-ups.Comfortable, clean, noiseless that electric motor car has, polluting the advantage such as very little is a huge innovation of the vehicles.But battery of electric vehicle becomes a bottleneck of restriction electric motor car development, and the flying power of battery determines the distance travelled of electric automobile, determines the later maintenance cost of electronic automobile the useful life of battery.Through studies show that, the charging process of battery had the greatest impact to the useful life of battery, and the process influence of discharge is less, and can say most of batteries definitive and do not damaged, or " being filled bad ".This shows that a good charger is to there being very important effect in useful life of battery.
The charging method of battery has a lot, and general conventional charging method has three kinds: constant current charge method, constant voltage charge method, stage charging method.Studies show that stage charging method can effectively prolong the useful life of battery, therefore the reasonable charger in market generally all adopts stage charging method now.As shown in Figure 1, traditional interim charger circuit adopts UC3842, field effect transistor, transformer to realize the conversion of AC-DC, and module 101 mainly is comprised of amplifier LM324, precision voltage source TL431, photoelectrical coupler AP817 etc., realizes constant current constant voltage control.Owing to there not be on the market specially the constant pressure and flow integrated circuit for charger, in traditional charger design scheme, employing operational amplifier that can only be a large amount of and independently reference voltage source and the discrete device constant current constant voltage that comes implementation phase to charge control.So just cause the peripheral circuit more complicated, and cost compare is high, the area of PCB version is also larger.
If a constant current constant voltage control integration circuit that is specifically designed to electric car charger of utility model can be without operational amplifier and reference voltage source independently, and the use of a large amount of minimizing discrete devices.Can effectively reduce cost like this.
Summary of the invention
Main purpose of the present utility model provides a kind of constant current constant voltage integrated circuit of electric car charger, realizes the constant current constant voltage control of the output of electric car charger, and has increased the drive circuit of charged state indicator light.
Of the present utility model being characterised in that: a kind of constant current constant voltage control integration circuit of electric car charger, it is characterized in that, comprising:
The output driving circuit of one current loop and voltage loop;
One current comparator is realized constant current control;
One voltage comparator is realized constant voltage control;
One drive circuit of indicator is realized the indication of charged state; And
One internal reference voltage source, the reference voltage that provides constant current constant voltage and charged state to monitor.
In the utility model one embodiment, the output driving circuit of described current loop and voltage loop comprises four transistors, two resistance, two constant-current sources and two electric capacity; Described first, second transistorized collector electrode links to each other with the first constant-current source simultaneously, the base stage of the first transistor links to each other with the output of described voltage comparator, the base stage of transistor seconds links to each other with the output of described current comparator, first, second transistorized emitter links to each other and links to each other with the 3rd, the 4th transistorized base stage respectively with first, second resistance respectively, and the other end of first, second resistance resistance is connected with ground; Three, the 4th transistorized collector electrode links to each other with an end of the second constant-current source, first, second electric capacity simultaneously, the three the, four transistorized emitters are connected to ground, the other end of first, second electric capacity links to each other with first, second transistorized base stage respectively, and an other end of first, second constant-current source links to each other with power supply.
In the utility model one embodiment, described internal reference voltage source comprises can provide 65mV, and a 2.5V reference voltage source and six resistance of the reference voltage of 190mV and 1.25V form.
In the utility model one embodiment, described drive circuit of indicator, comprise two operational amplifiers, the negative input end of the first operational amplifier links to each other with internal reference voltage source described above, output links to each other with the positive input terminal of the second operational amplifier, and the negative input end of the second operational amplifier links to each other with internal reference voltage source described above.
Advantage of the present utility model: integrated circuit of the present utility model only needs peripheral circuit seldom, just can realize the constant current constant voltage control function of electric car charger, and increased the charger state-indicating function, reduce greatly the use of discrete device, effectively reduced the cost of electric car charger.
Description of drawings
The electric car charger circuit that Fig. 1 is common.
The block diagram of Fig. 2 the utility model embodiment.
Fig. 3 adopts the electric car charger circuit of integrated circuit (IC) design of the present utility model.
Wherein: FUSE1/FUSE2: fuse EC35: transformer
UTC UC3824: integrated circuit (IC) chip LM324: integrated circuit (IC) chip
AP817: photoelectrical coupler 101: constant-current and constant-voltage control circuit
UTC 8N60: field effect transistor D108/D104: light-emitting diode
201: internal reference voltage source 202: the output driving circuit of current loop and voltage loop
203: drive circuit of indicator A201/A202: the first/the second operational amplifier
Q201/Q202/Q203/Q204: the first/the second/the 3rd/the 4th transistor R207/R208: the first/the second resistance
C206/C207: the first/the second electric capacity A203: current comparator
A204: voltage comparator OC: photoelectrical coupler
I201/I202: the first/the second constant-current source UTC UM608: integrated circuit of the present utility model
BT+/BT-: battery charging output port.
Embodiment
With reference to figure 1 and Fig. 2, the utility model relates to a kind of constant current constant voltage control integration circuit of electric car charger, comprising:
The output driving circuit of one current loop and voltage loop;
One current comparator is realized constant current control;
One voltage comparator is realized constant voltage control;
One drive circuit of indicator is realized the indication of charged state; And
One internal reference voltage source, the reference voltage that provides constant current constant voltage and charged state to monitor.
The output driving circuit of above-mentioned current loop and voltage loop comprises four transistors, two resistance, two constant-current sources and two electric capacity; Described first, second transistorized collector electrode links to each other with the first constant-current source simultaneously, the base stage of the first transistor links to each other with the output of described voltage comparator, the base stage of transistor seconds links to each other with the output of described current comparator, first, second transistorized emitter links to each other and links to each other with the 3rd, the 4th transistorized base stage respectively with first, second resistance respectively, and the other end of first, second resistance resistance is connected with ground; Three, the 4th transistorized collector electrode links to each other with an end of the second constant-current source, first, second electric capacity simultaneously, the three the, four transistorized emitters are connected to ground, the other end of first, second electric capacity links to each other with first, second transistorized base stage respectively, and an other end of first, second constant-current source links to each other with power supply.
Above-mentioned internal reference voltage source comprises can provide 65mV, and a 2.5V reference voltage source and six resistance of the reference voltage of 190mV and 1.25V form.
Above-mentioned drive circuit of indicator, comprise two operational amplifiers, the negative input end of the first operational amplifier links to each other with internal reference voltage source described above, output links to each other with the positive input terminal of the second operational amplifier, and the negative input end of the second operational amplifier links to each other with internal reference voltage source described above.
Specific implementation process: please refer to Fig. 2, Fig. 2 is the design block diagram of whole integrated circuit, and the present embodiment provides a kind of constant current constant voltage control integration circuit of electric car charger, and it comprises: the output driving circuit of a current loop and voltage loop; One current comparator is realized constant current control; One voltage comparator is realized constant voltage control; One drive circuit of indicator is realized the indication of charged state; And an internal reference voltage source, the reference voltage of constant current constant voltage and charged state monitoring is provided.
In order to allow those skilled in the art better understand the utility model, below we will be described in detail the course of work of whole circuit.
With reference to Fig. 2, when just beginning to charge, R214 and R212 detect cell voltage, owing to just having begun charging, the output voltage of this moment is lower, so the current potential of R214 and R212 dividing potential drop will be lower than the reference voltage that has R203 and R204 dividing potential drop to obtain, A204 is output as low, not conducting of Q201, Q203 is in cut-off state, and the voltage control loop is inoperative this moment.And R213 detects charging current, detects voltage by comparing with the reference voltage that R205 and R206 dividing potential drop obtain, if electric current surpasses certain value, A203 output uprises Q202, Q204 conducting.The conducting of OC photoelectrical coupler, the control circuit of control AC-DC, current loop work this moment realizes constant current charge.Along with the continuous rising of cell voltage, A204 output becomes high potential, Q201, Q203 conducting, and simultaneously because charging current reduces, and A203 output becomes electronegative potential, Q202, Q204 cut-off, voltage loop work this moment, and the current loop cut-off realizes constant voltage charge.For the charged state deixis, by INPUT pin monitoring charging current, when just beginning to charge, charging current is larger, and the A201 output voltage is high, the work of D203 LED light, and the A202 output voltage is low, the D204 LED light is not worked.When battery is charged to a certain degree, electric current drops to very low, can think that charging finishes this moment, and A201 output becomes low level, and the D203 LED light is not worked, and A202 is output as high level, the work of D204 LED light.
Fig. 3 is the electric car charger circuit that adopts integrated circuit (IC) design of the present utility model, and with new integrated circuit UM608 after, the constant current constant voltage module is much simple than among Fig. 1 obviously.
The above only is preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (4)
1. the constant current constant voltage control integration circuit of an electric car charger is characterized in that, comprising:
The output driving circuit of one current loop and voltage loop;
One current comparator is realized constant current control;
One voltage comparator is realized constant voltage control;
One drive circuit of indicator is realized the indication of charged state; And
One internal reference voltage source, the reference voltage that provides constant current constant voltage and charged state to monitor; The output driving circuit of described current loop and voltage loop comprises four transistors, two resistance, two constant-current sources and two electric capacity; Described first, second transistorized collector electrode links to each other with the first constant-current source simultaneously, the base stage of the first transistor links to each other with the output of described voltage comparator, the base stage of transistor seconds links to each other with the output of described current comparator, first, second transistorized emitter links to each other and links to each other with the 3rd, the 4th transistorized base stage respectively with first, second resistance respectively, and the other end of first, second resistance resistance is connected with ground; Three, the 4th transistorized collector electrode links to each other with an end of the second constant-current source, first, second electric capacity simultaneously, the three the, four transistorized emitters are connected to ground, the other end of first, second electric capacity links to each other with first, second transistorized base stage respectively, and an other end of first, second constant-current source links to each other with power supply.
2. the constant current constant voltage control integration circuit of electric car charger according to claim 1, it is characterized in that: described internal reference voltage source comprises can provide 65mV, and a 2.5V reference voltage source and six resistance of the reference voltage of 190mV and 1.25V form.
3. the constant current constant voltage control integration circuit of electric car charger according to claim 1, it is characterized in that: described drive circuit of indicator, comprise two operational amplifiers, the negative input end of the first operational amplifier links to each other with internal reference voltage source described above, output links to each other with the positive input terminal of the second operational amplifier, and the negative input end of the second operational amplifier links to each other with internal reference voltage source described above.
4. the constant current constant voltage control integration circuit of electric car charger according to claim 2, it is characterized in that: described drive circuit of indicator, comprise two operational amplifiers, the negative input end of the first operational amplifier links to each other with internal reference voltage source described above, output links to each other with the positive input terminal of the second operational amplifier, and the negative input end of the second operational amplifier links to each other with internal reference voltage source described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220211607 CN202737552U (en) | 2012-05-12 | 2012-05-12 | Constant-current constant-voltage control integrated circuit of electric vehicle charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220211607 CN202737552U (en) | 2012-05-12 | 2012-05-12 | Constant-current constant-voltage control integrated circuit of electric vehicle charger |
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| Publication Number | Publication Date |
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| CN202737552U true CN202737552U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220211607 Withdrawn - After Issue CN202737552U (en) | 2012-05-12 | 2012-05-12 | Constant-current constant-voltage control integrated circuit of electric vehicle charger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684282A (en) * | 2012-05-12 | 2012-09-19 | 大连连顺电子有限公司 | Constant-current and constant-voltage control integrated circuit of electric vehicle charger |
-
2012
- 2012-05-12 CN CN 201220211607 patent/CN202737552U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684282A (en) * | 2012-05-12 | 2012-09-19 | 大连连顺电子有限公司 | Constant-current and constant-voltage control integrated circuit of electric vehicle charger |
| CN102684282B (en) * | 2012-05-12 | 2015-02-18 | 大连连顺电子有限公司 | Constant-current and constant-voltage control integrated circuit of electric vehicle charger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130213 Effective date of abandoning: 20150218 |
|
| RGAV | Abandon patent right to avoid regrant |