CN204633351U - A kind of high multiplying power lithium ion car emergency power balancing charging system - Google Patents
A kind of high multiplying power lithium ion car emergency power balancing charging system Download PDFInfo
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- CN204633351U CN204633351U CN201520167855.3U CN201520167855U CN204633351U CN 204633351 U CN204633351 U CN 204633351U CN 201520167855 U CN201520167855 U CN 201520167855U CN 204633351 U CN204633351 U CN 204633351U
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Abstract
The utility model provides a kind of high multiplying power lithium ion car emergency power balancing charging system, comprise: current rectifying and wave filtering circuit, high frequency conversion circuit, feedback control circuit and pulse-width modulation circuit and output DC circuit, the output of described current rectifying and wave filtering circuit connects high frequency conversion circuit, the output of described high frequency conversion circuit connects output DC circuit, the output of described high frequency conversion circuit connects feedback control circuit, the output of described feedback control circuit connects pulse modulated circuit, the output of described pulse modulated circuit is connected to the input of high frequency conversion circuit, between described feedback control circuit and pulse modulated circuit, buffer circuit is set.When the high multiplying power lithium ion car emergency power balancing charging system that the utility model provides can make battery electric quantity lower, charging current reaches maximum, when battery electric quantity is soon close to maximum storage electricity, charging current starts to reduce, and is conducive to extending battery.
Description
Technical field
The utility model relates to emergency power supply charging system, is specifically related to a kind of high multiplying power lithium ion car emergency power balancing charging system.
Background technology
Along with the development of society, informationization, modernization, more depend on electric power, it is unexpected that power-off can bring impact to the normal orders of life of people and study, especially for producing, in life the load of particular importance once interruption of power supply, great economic loss will be caused, emergency power supply product has become the requisite visual plant of a lot of important place, also be the effective way that can solve the problem such as power outage and power quality instability most effectively, and battery charger is the heart of emergency power supply.
In car emergency power supply, the use of Li-Ion rechargeable battery is very general at present, its application is comparatively extensive, the centralized charging modes of series connection is generally adopted for lithium cell charging, namely the charging to series battery is realized by a centralized charging device, the charging device that this charging modes adopts is simple, cost is low, but be with you unbalanced to rushing of battery pack, easily occur that percentage of batteries overcharges, the phenomenon of the undercharge of percentage of batteries charge less, thus cause batteries charging off-capacity, the lost of life of cell damage or battery pack.
Utility model content
In order to overcome above-mentioned prior art Problems existing, the utility model provides a kind of high multiplying power lithium ion car emergency power balancing charging system.
The technical solution of the utility model is: a kind of high multiplying power lithium ion car emergency power balancing charging system, comprise: current rectifying and wave filtering circuit, high frequency conversion circuit, feedback control circuit and pulse-width modulation circuit and output DC circuit, the output of described current rectifying and wave filtering circuit connects high frequency conversion circuit, the output of described high frequency conversion circuit connects output DC circuit, the output of described high frequency conversion circuit connects feedback control circuit, the output of described feedback control circuit connects pulse modulated circuit, the output of described pulse modulated circuit is connected to the input of high frequency conversion circuit, between described feedback control circuit and pulse modulated circuit, buffer circuit is set.
Further, the described high frequency conversion circuit resonant circuit that comprises the clamp circuit be made up of electric capacity C1, resistance R1, R2, diode D1 and electric capacity C2, the ON-OFF control circuit be made up of switching tube Q1, resistance R5, resistance R6, resistance R7, transformer T1 and be made up of resistance R3, electric capacity C3, diode D2, electric capacity C4, electric capacity C5 and inductance L 1; Described electric capacity C1 is connected with the positive pole of diode D2 with after resistance R4 parallel connection, described resistance R2 and electric capacity C2 connects, the positive pole of described electric capacity C1 and one end of electric capacity R2 are connected to the positive terminal of transformer primary side, the negative pole of described diode D1 and the negative pole of electric capacity C2 are connected to the negative pole end of described transformer primary side, the output that access transformer T1 secondary side in parallel with diode D2 after described resistance R3 connects with electric capacity C3, described electric capacity C4, electric capacity C5 and inductance L 1 form π type filter circuit.
Further, described pulse-width modulation circuit comprises pulse width modulating chip IC1, and described pulse width modulating chip IC1 employing model is the current-control type pulse width control chip of 3842 series.
Further, the drain electrode of described switching tube Q1 is connected with the negative pole of transformer primary side, the source electrode of described switching tube Q1 is connected with current input terminal 3 pin of pulse width control chip by resistance R8, and 6 pin outputs of described pulse width control chip pass through the grid of resistance R5 connecting valve pipe Q1.
Further, described input feedback control circuit is made up of current feedback adjuster and voltage feedback adjustor, and described current feedback adjuster and voltage feedback adjustor are pi regulator.
The beneficial effects of the utility model are: when the high multiplying power lithium ion car emergency power balancing charging system that the utility model provides can make battery electric quantity lower, charging current reaches maximum, when battery electric quantity is soon close to maximum storage electricity, charging current starts to reduce, and is conducive to extending battery.
Accompanying drawing explanation
Fig. 1 is a kind of high multiplying power lithium ion car emergency power balancing charging system structure chart that the utility model proposes;
Fig. 2 is a kind of high multiplying power lithium ion car emergency power balancing charging system circuit structure that the utility model proposes.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
See Fig. 1 to Fig. 2, wherein Fig. 1 is a kind of high multiplying power lithium ion car emergency power balancing charging system structure chart that the utility model proposes; Fig. 2 is a kind of high multiplying power lithium ion car emergency power balancing charging system circuit structure that the utility model proposes.
As shown in Figure 1 to Figure 2, a kind of high multiplying power lithium ion car emergency power balancing charging system, comprise: current rectifying and wave filtering circuit, high frequency conversion circuit, feedback control circuit and pulse-width modulation circuit and output DC circuit, the output of described current rectifying and wave filtering circuit connects high frequency conversion circuit, the output of described high frequency conversion circuit connects output DC circuit, the output of described high frequency conversion circuit connects feedback control circuit, the output of described feedback control circuit connects pulse modulated circuit, the output of described pulse modulated circuit is connected to the input of high frequency conversion circuit, between described feedback control circuit and pulse modulated circuit, buffer circuit is set.
Further, the described high frequency conversion circuit resonant circuit that comprises the clamp circuit be made up of electric capacity C1, resistance R1, R2, diode D1 and electric capacity C2, the ON-OFF control circuit be made up of switching tube Q1, resistance R5, resistance R6, resistance R7, transformer T1 and be made up of resistance R3, electric capacity C3, diode D2, electric capacity C4, electric capacity C5 and inductance L 1; Described electric capacity C1 is connected with the positive pole of diode D2 with after resistance R4 parallel connection, described resistance R2 and electric capacity C2 connects, the positive pole of described electric capacity C1 and one end of electric capacity R2 are connected to the positive terminal of transformer primary side, the negative pole of described diode D1 and the negative pole of electric capacity C2 are connected to the negative pole end of described transformer primary side, the output that access transformer T1 secondary side in parallel with diode D2 after described resistance R3 connects with electric capacity C3, described electric capacity C4, electric capacity C5 and inductance L 1 form π type filter circuit.
In the utility model embodiment, by high frequency conversion circuit, the direct voltage of the output of current rectifying and wave filtering circuit is converted to voltage to export and electric current output, by arranging clamp circuit by voltage clamp below switching tube drain-source breakdown voltage, prevent from causing damage because transformer exists leakage inductance generation peak voltage switch tube, by arranging π type filter circuit, the ripple voltage that high-frequency converter is produced reduces greatly, prevents too large ripple voltage from making control circuit job insecurity.
In the utility model embodiment, feedback control circuit and pulse-width modulation circuit are carried out light-coupled isolation by optical coupling isolator IC4 by buffer circuit, prevent feedback control circuit end from producing interference to pulse-width modulation circuit, improve the accuracy of pulse-width modulation circuit.
When high-frequency converter is in total energy conversion, switching tube conducting, transformer primary side current rises to peak current and stores energy on high frequency transformer, when switching tube turns off, be stored in the energy transferring of transformer to secondary, protected by clamp circuit switch tube, when the energy being stored in primary side all discharges by transformer, carry out filtering by π type resonator filter circuit; When high-frequency converter is in incomplete power conversion, switching tube starts conducting, makes beginning electric current non-vanishing because transformer also stores energy, and switching tube turns off, and the energy of transformer to secondary, but does not discharge by the energy transferring of storage completely.
Further, described pulse-width modulation circuit comprises pulse width modulating chip IC1, and described pulse width modulating chip IC1 employing model is the current-control type pulse width control chip of 3842 series.
Further, the drain electrode of described switching tube Q1 is connected with the negative pole of transformer primary side, the source electrode of described switching tube Q1 is connected with current input terminal 3 pin of pulse width control chip by resistance R8, and 6 pin outputs of described pulse width control chip pass through the grid of resistance R5 connecting valve pipe Q1.
In the utility model embodiment, pulse-width modulation circuit adopts 3842 family chips, by accessing an electric capacity C7 between sawtooth waveforms output 4 pin and current sense input 3 pin of chip, the signal produced because of gate-drive in the current signal detected is rejected by the stream effect of taking out utilizing sawtooth waveforms trailing edge to produce, thus switching tube can be made to obtain minimum service time go to keep exporting, prevent oscillatory occurences.
Further, described input feedback control circuit is made up of current feedback adjuster and voltage feedback adjustor, and described current feedback adjuster and voltage feedback adjustor are pi regulator.
In the utility model embodiment, as long as compare the output end voltage height of two pi regulators in feedback control circuit, just can realize state instruction.When IC2 output voltage is higher than IC3 output voltage, current feedback works, and circuit is in charged state.Otherwise, be in floating charge state.
When the high multiplying power lithium ion car emergency power balancing charging system that the utility model provides can make battery electric quantity lower, charging current reaches maximum, when battery electric quantity is soon close to maximum storage electricity (battery is soon full of), charging current starts to reduce, and is conducive to extending battery.
Above the utility model is described in detail, but the utility model is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from the utility model aim.Do not depart from design of the present utility model and scope can make many other and change and remodeling.Should be appreciated that the utility model is not limited to specific execution mode, scope of the present utility model is defined by the following claims.
Claims (5)
1. a high multiplying power lithium ion car emergency power balancing charging system, it is characterized in that, comprise: current rectifying and wave filtering circuit, high frequency conversion circuit, feedback control circuit and pulse-width modulation circuit and output DC circuit, the output of described current rectifying and wave filtering circuit connects high frequency conversion circuit, the output of described high frequency conversion circuit connects output DC circuit, the output of described high frequency conversion circuit connects feedback control circuit, the output of described feedback control circuit connects pulse modulated circuit, the output of described pulse modulated circuit is connected to the input of high frequency conversion circuit, between described feedback control circuit and pulse modulated circuit, buffer circuit is set.
2. a kind of high multiplying power lithium ion car emergency power balancing charging system according to claim 1, it is characterized in that, the resonant circuit that described high frequency conversion circuit comprises the clamp circuit be made up of electric capacity C1, resistance R1, R2, diode D1 and electric capacity C2, the ON-OFF control circuit be made up of switching tube Q1, resistance R5, resistance R6, resistance R7, transformer T1 and is made up of resistance R3, electric capacity C3, diode D2, electric capacity C4, electric capacity C5 and inductance L 1; Described electric capacity C1 is connected with the positive pole of diode D2 with after resistance R4 parallel connection, described resistance R2 and electric capacity C2 connects, the positive pole of described electric capacity C1 and one end of electric capacity R2 are connected to the positive terminal of transformer primary side, the negative pole of described diode D1 and the negative pole of electric capacity C2 are connected to the negative pole end of described transformer primary side, the output that access transformer T1 secondary side in parallel with diode D2 after described resistance R3 connects with electric capacity C3, described electric capacity C4, electric capacity C5 and inductance L 1 form π type filter circuit.
3. a kind of high multiplying power lithium ion car emergency power balancing charging system according to claim 1, it is characterized in that, described pulse-width modulation circuit comprises pulse width modulating chip IC1, and described pulse width modulating chip IC1 employing model is the current-control type pulse width control chip of 3842 series.
4. a kind of high multiplying power lithium ion car emergency power balancing charging system according to claim 2, it is characterized in that, the drain electrode of described switching tube Q1 is connected with the negative pole of transformer primary side, the source electrode of described switching tube Q1 is connected with current input terminal 3 pin of pulse width control chip by resistance R8, and 6 pin outputs of described pulse width control chip pass through the grid of resistance R5 connecting valve pipe Q1.
5. a kind of high multiplying power lithium ion car emergency power balancing charging system according to claim 1, it is characterized in that, described input feedback control circuit is made up of current feedback adjuster and voltage feedback adjustor, and described current feedback adjuster and voltage feedback adjustor are pi regulator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520167855.3U CN204633351U (en) | 2015-03-20 | 2015-03-20 | A kind of high multiplying power lithium ion car emergency power balancing charging system |
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| CN201520167855.3U CN204633351U (en) | 2015-03-20 | 2015-03-20 | A kind of high multiplying power lithium ion car emergency power balancing charging system |
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| CN204633351U true CN204633351U (en) | 2015-09-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994622A (en) * | 2016-10-26 | 2018-05-04 | 宁德时代新能源科技股份有限公司 | Battery power supply circuit |
| CN108964232A (en) * | 2018-06-28 | 2018-12-07 | 杭州利尔达展芯科技有限公司 | A kind of 2.4G ISM band RF energy Acquisition Circuit |
-
2015
- 2015-03-20 CN CN201520167855.3U patent/CN204633351U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994622A (en) * | 2016-10-26 | 2018-05-04 | 宁德时代新能源科技股份有限公司 | Battery power supply circuit |
| CN108964232A (en) * | 2018-06-28 | 2018-12-07 | 杭州利尔达展芯科技有限公司 | A kind of 2.4G ISM band RF energy Acquisition Circuit |
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