CN101872984A - Three-step charger - Google Patents
Three-step charger Download PDFInfo
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- CN101872984A CN101872984A CN200910053809A CN200910053809A CN101872984A CN 101872984 A CN101872984 A CN 101872984A CN 200910053809 A CN200910053809 A CN 200910053809A CN 200910053809 A CN200910053809 A CN 200910053809A CN 101872984 A CN101872984 A CN 101872984A
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Abstract
The invention discloses a three-step charger, which comprises a rectified filter circuit, a DC/DC converting circuit, a DC output interface and a controlling detection circuit, wherein the output of the rectified filter circuit is connected with the input of the DC/DC converting circuit; the output of the DC/DC converting circuit is connected with the input of the DC output interface; the output of the DC output interface is connected with the input of the controlling detection circuit; and the input of the controlling detection circuit is connected with the input of the DC/DC converting circuit. The three-step charger has the advantages of low cost, simple circuit, high efficiency and good reliability and therefore is a high cost performance product.
Description
Technical field
The invention belongs to charger field, be specifically related to a kind of three-step charger.
Background technology
So-called three-step charger, first stage is constant-current phase, and second stage is constant-voltage phase (high constant-voltage phase), and three phases is trickle stage (also promptly low constant-voltage phase of floating charge stage).From the electronic technology angle pin for battery: first stage is named the charging current limiter stage, and second stage is high constant-voltage phase, and three phases is relatively properer low constant-voltage phase.During second stage and phase III conversion, the corresponding conversion of panel leds, first and second stage of most of chargers is a red light, the phase III becomes green light.The mutual conversion of second stage and phase III enters first second stage by the charging current decision greater than certain electric current, enters the phase III less than certain electric current.This electric current also is breakover current switching current.
Charger at present commonly used does not generally have the syllogic function in design, and performance is unreliable, and has adopted the charger of the miniature control unit of MCU (MicroController Unit), and circuit complexity, cost are higher.
Summary of the invention
The objective of the invention is to overcome the above defective, a kind of three-step charger is provided, its circuit is simple, cost is low and reliable and practical.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of three-step charger, comprise current rectifying and wave filtering circuit, DC/DC translation circuit, direct current output interface and control detection circuit, the output of wherein said current rectifying and wave filtering circuit connects the input of described DC/DC translation circuit, the output of described DC/DC translation circuit connects the input of described direct current output interface, the output of described direct current output interface connects the input of described control detection circuit, and the output of described control detection circuit connects the input of described DC/DC translation circuit.
Above-mentioned control detection circuit is divided into testing circuit and control circuit two parts, the input of wherein said testing circuit is connected with the output of described direct current output interface, the output of described testing circuit is connected with the input of described control circuit, and the output of described control circuit is connected with the input of described DC/DC translation circuit.
The above-mentioned charger of stating also comprises protective circuit, and its input is connected with the output of described testing circuit, and its output is connected with the input of described control circuit; Also comprise ac filter circuit, its output is connected with the input of described current rectifying and wave filtering circuit.
Above-mentioned charger also comprises high frequency transformer and DC filtering circuit, the input of described high frequency transformer is connected with the output of described DC/DC translation circuit, the output of described high frequency transformer is connected with the input of described DC filtering circuit, and the output of described DC filtering circuit is connected with the input of described direct current output interface.
Described charger also comprises auxiliary power circuit, and its input is connected with the output of described ac filter circuit, and its output is connected with the input of described control detection circuit.
Above-mentioned testing circuit mainly comprises first comparator, second comparator, triode, adjustable resistance, the output of wherein said first comparator is connected with the backward end of described second comparator, the output of described second comparator is connected with the base stage of described triode, the in-phase end of described second comparator is connected with the emitter of described triode, and described adjustable resistance is between the collector electrode and emitter of described triode.
Beneficial effect of the present invention is: cost is low, circuit is simple, have higher operating efficiency and good reliability, is a kind of cost performance high product.
Description of drawings
Fig. 1 is a functional block diagram of the present invention;
Fig. 2 is the functional block diagram of the specific embodiment of the invention;
Fig. 3 is the circuit connection diagram of testing circuit in the specific embodiment of the invention;
Fig. 4 is the circuit connection diagram of control circuit in the specific embodiment of the invention;
Fig. 5 is that the three-step charger charging curve is graphic under the perfect condition;
Fig. 6 is that the charging curve of a kind of three-step charger of the present invention is graphic.
Embodiment
Now in conjunction with the accompanying drawings the specific embodiment of the present invention is further described.
Be functional block diagram of the present invention as shown in Figure 1, comprise current rectifying and wave filtering circuit, DC/DC translation circuit, direct current output interface and control detection circuit, the output of wherein said current rectifying and wave filtering circuit connects the input of described DC/DC translation circuit, the output of described DC/DC translation circuit connects the input of described direct current output interface, the output of described direct current output interface connects the input of described control detection circuit, and the output of described control detection circuit connects the input of described DC/DC translation circuit.
Be the functional block diagram of the specific embodiment of the invention as shown in Figure 2; comprise ac filter circuit; current rectifying and wave filtering circuit; the DC/DC translation circuit; high frequency transformer; the DC filtering circuit; the direct current output interface; auxiliary power circuit; control circuit; testing circuit; and protective circuit; described ac filter circuit; with described current rectifying and wave filtering circuit; the DC/DC translation circuit; high frequency transformer; the DC filtering circuit; the direct current output interface connects successively; the output of described direct current output interface is connected with the input of described testing circuit; the output of described testing circuit is connected with the input of described control circuit; the input of described auxiliary power circuit is connected with the output of described ac filter circuit; the output of described auxiliary power circuit is connected with the input of described control circuit, and the output of described control circuit is connected with the input of described DC/DC translation circuit.The input of described protective circuit is connected with the output of described auxiliary power circuit and described testing circuit respectively, and the output of described protective circuit is connected with the input of described control circuit.Whole charger does not adopt miniature control unit.
Be the circuit connection diagram of testing circuit in the specific embodiment of the invention as shown in Figure 3.When the external connection battery group was charged, current detecting point 1 detected the charging current reference value, and the multiple of the ratio by resistance R 83 and R82 amplifies, and then through the first comparator U8A relatively, determined the magnitude of voltage size of output 1.In addition, the reference voltage level of the in-phase end 5 of the second comparator U8B is 2.5V.At the beginning, the reference voltage level of end of oppisite phase 6 is greater than 2.5V, output 7 output high level then, and the conducting of D84, then Q2 conducting, enter the constant current charge stage this moment, and the current value gear of the correspondence that concrete numerical value is allocated to for the switch S 1 among Fig. 4; Along with continuous charging, the magnitude of voltage of battery terminal voltage test point will climb, and when rising to 14.8V (is example with the lead acid accumulator), voltage will be kept this value, and charging enters the constant voltage charge stage.This moment, voltage was by R35, R80, and the R81 fixed resistance value is come dividing potential drop, and the voltage reference points magnitude of voltage is the 2.5V fixed value.Simultaneously, R81 is adjustable resistance, then by changing its resistance size, regulates different output voltage values, can give the supply of charging of different battery varieties; When constant-voltage phase, the charging stream reference value that current detecting point 1 detects is constantly diminishing, and through R83, the multiple of the ratio of R82 amplifies, and is adjusted the voltage of output 1 by the first comparator U8A.When promptly the magnitude of voltage that detects when the end of oppisite phase 6 of the second comparator U8B is lower than 2.5V, output 7 output low levels then, D84 is conducting not, and then Q2 ends.At this moment, the magnitude of voltage of battery terminal voltage test point is then by R35, and R80 comes dividing potential drop.Simultaneously, the battery terminal voltage value is reduced to 13.6V (is example with the lead acid accumulator), and at this moment, charging enters the floating charge stage (also being the switching current stage).
Thus, do not utilize microcontroller treatment circuits such as MCU, can realize the charge mode of syllogic yet.Simultaneously, the size according to changing adjustable resistance R81 resistance is embodied as different types of battery pack and charges.
Be the circuit connection diagram of control circuit in the specific embodiment of the invention as shown in Figure 4.
Be that the three-step charger charging curve is graphic under the perfect condition as shown in Figure 5, this shows voltage, electric current changing value in different phase.The charging curve that is a kind of three-step charger of the present invention as shown in Figure 6 is graphic, and in the constant current charge stage, the charger charging current keeps constant 4A, and charging into electric weight increases fast, and cell voltage rises; In the constant voltage charge stage, the charger charging voltage keeps about constant 14.8V, charges into electric weight and continues to increase, and cell voltage slowly rises, and charging current descends; Storage battery is full of, and charging current drops to and is lower than about floating charge switching current 300mA, and the charger charging voltage is reduced to float charge voltage 13.6V; In the floating charge stage, the charger charging voltage remains about float charge voltage 13.6V.
In the constant voltage charge stage, the reference voltage of charger charging voltage is about 14.8V.This value height helps quick full charge, but makes the battery dehydration easily, and charging later stage electric current is unable to come down, and the result makes battery heating distortion; This value is low to be unfavorable for the quick full charge of battery, helps to the trickle phase transition.Though this value does not have reference voltage level strictness like that among step c, the d, and is not too high yet.Usually the reference voltage of float charge voltage is about 13.6V, spends the end, can cause the battery pole plates sulfuration, causes capacity to descend the battery premature termination; Too high, can cause thermal runaway, the serious dehydration of battery, premature termination.
Deviation too conference causes the battery salinization, overtension will make the battery dehydration, make battery heating distortion easily, and the purpose that this floating charge point is set is to keep battery being full of electric state and don't overcharging, naturally the regular maintenance of battery and the prolongation in useful life are convenient in the discharge of balancing battery.
Switching current is to switch the set point of optimum charging voltage to float charge voltage, and this value height helps avoiding undue dehydration and thermal runaway, but is unfavorable for that battery is full of fast.This value is low to help being full of electricity still because battery charges always under the ceiling voltage situation, make the battery dehydration easily, causes thermal runaway, even does not also drop to breakover current, will fill battery bad.So according to actual behaviour in service, the reference value that switching current provides has certain limit, positive and negative 50 milliamperes even 100 milliamperes all allow, but do not allow less than 200 milliamperes.
Above-mentioned explanation is the embodiment of this invention, it is not construed as limiting the essence of an invention content, the person of an ordinary skill in the technical field is reading behind the specification and can above-mentioned embodiment made an amendment or be out of shape, and does not deviate from essence of an invention and scope.
Claims (8)
1. three-step charger, it is characterized in that, this charger comprises current rectifying and wave filtering circuit, DC/DC translation circuit, direct current output interface and control detection circuit, the output of wherein said current rectifying and wave filtering circuit connects the input of described DC/DC translation circuit, the output of described DC/DC translation circuit connects the input of described direct current output interface, the output of described direct current output interface connects the input of described control detection circuit, and the output of described control detection circuit connects the input of described DC/DC translation circuit.
2. charger according to claim 1, it is characterized in that, described control detection circuit is divided into testing circuit and control circuit two parts, the input of wherein said testing circuit is connected with the output of described direct current output interface, the output of described testing circuit is connected with the input of described control circuit, and the output of described control circuit is connected with the input of described DC/DC translation circuit.
3. charger according to claim 2 is characterized in that described charger also comprises protective circuit, and its input is connected with the output of described testing circuit, and its output is connected with the input of described control circuit.
4. according to the arbitrary described charger of claim 1-3, it is characterized in that described charger also comprises ac filter circuit, its output is connected with the input of described current rectifying and wave filtering circuit.
5. according to the arbitrary described charger of claim 1-3, it is characterized in that, described charger also comprises high frequency transformer and DC filtering circuit, the input of described high frequency transformer is connected with the output of described DC/DC translation circuit, the output of described high frequency transformer is connected with the input of described DC filtering circuit, and the output of described DC filtering circuit is connected with the input of described direct current output interface.
6. charger according to claim 4, it is characterized in that, described charger also comprises high frequency transformer and DC filtering circuit, the input of described high frequency transformer is connected with the output of described DC/DC translation circuit, the output of described high frequency transformer is connected with the input of described DC filtering circuit, and the output of described DC filtering circuit is connected with the input of described direct current output interface.
7. charger according to claim 6 is characterized in that described charger also comprises auxiliary power circuit, and its input is connected with the output of described ac filter circuit, and its output is connected with the input of described control detection circuit.
8. charger according to claim 2, it is characterized in that, described testing circuit mainly comprises first comparator, second comparator, triode, adjustable resistance, the output of wherein said first comparator is connected with the backward end of described second comparator, the output of described second comparator is connected with the base stage of described triode, the in-phase end of described second comparator is connected with the emitter of described triode, and described adjustable resistance is between the collector electrode and emitter of described triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910053809A CN101872984A (en) | 2009-06-25 | 2009-06-25 | Three-step charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910053809A CN101872984A (en) | 2009-06-25 | 2009-06-25 | Three-step charger |
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| CN101872984A true CN101872984A (en) | 2010-10-27 |
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| CN200910053809A Pending CN101872984A (en) | 2009-06-25 | 2009-06-25 | Three-step charger |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682459A (en) * | 2013-11-29 | 2015-06-03 | 北京力源兴达科技有限公司 | Charging circuit based on constant current-constant voltage-floating charging method of lead acid storage battery |
| CN104821623A (en) * | 2015-04-30 | 2015-08-05 | 苏州迈力电器有限公司 | Battery charger |
| CN105811478A (en) * | 2014-12-30 | 2016-07-27 | 苏州宝时得电动工具有限公司 | Battery charge management method and charge management system |
| CN108649661A (en) * | 2018-06-15 | 2018-10-12 | 大连海事大学 | T L494-based storage battery three-section type charger |
| CN112224023A (en) * | 2020-10-15 | 2021-01-15 | 中车唐山机车车辆有限公司 | High-speed motor train unit storage battery charging protection method |
-
2009
- 2009-06-25 CN CN200910053809A patent/CN101872984A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682459A (en) * | 2013-11-29 | 2015-06-03 | 北京力源兴达科技有限公司 | Charging circuit based on constant current-constant voltage-floating charging method of lead acid storage battery |
| CN105811478A (en) * | 2014-12-30 | 2016-07-27 | 苏州宝时得电动工具有限公司 | Battery charge management method and charge management system |
| CN104821623A (en) * | 2015-04-30 | 2015-08-05 | 苏州迈力电器有限公司 | Battery charger |
| CN104821623B (en) * | 2015-04-30 | 2019-01-11 | 苏州迈力电器有限公司 | Battery charger |
| CN108649661A (en) * | 2018-06-15 | 2018-10-12 | 大连海事大学 | T L494-based storage battery three-section type charger |
| CN108649661B (en) * | 2018-06-15 | 2022-05-13 | 大连海事大学 | TL 494-based storage battery three-section charger |
| CN112224023A (en) * | 2020-10-15 | 2021-01-15 | 中车唐山机车车辆有限公司 | High-speed motor train unit storage battery charging protection method |
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Application publication date: 20101027 |