CN102832681A - Lithium battery pack charger of wind power pitch system - Google Patents
Lithium battery pack charger of wind power pitch system Download PDFInfo
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- CN102832681A CN102832681A CN2011101573401A CN201110157340A CN102832681A CN 102832681 A CN102832681 A CN 102832681A CN 2011101573401 A CN2011101573401 A CN 2011101573401A CN 201110157340 A CN201110157340 A CN 201110157340A CN 102832681 A CN102832681 A CN 102832681A
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- lithium battery
- circuit
- wind power
- constant current
- battery group
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Abstract
The invention discloses a lithium battery pack charger of a wind power pitch system. The lithium battery pack charger comprises a switch power circuit, a constant current voltage-limiting circuit connected with the switch power source circuit in parallel, a control unit connected with the constant current voltage-limiting circuit in parallel, and a sampling protective circuit connected with the constant current voltage-limiting circuit in parallel, wherein the sampling protective circuit is connected with the control unit in series. The lithium battery pack charger is stable in performance and durable in charging property, and can better satisfy demands that a wind power pitch backup power source is charged and discharged frequently and has a high reliability requirement.
Description
Technical field
The present invention relates to a kind of charger, relate in particular to a kind of lithium battery group charger of wind power pitch-controlled system, belong to technical field of wind power generating equipment.
Background technology
Along with non-renewable energy resources face exhausted awkward situation at world wide, for satisfying suitability for industrialized production with the human lives is required, people are to the concern of solar energy, wind-force, these regenerative resources of waterpower and utilize lifting day by day.Wherein, wind power generation is a kind of ripe relatively developmental technology of new energy resources that developed, and has and popularizes widely and use.
In wind generator system; Under the situation that guarantees blower fan system fault or grid cut-off, pitch-controlled system can be put away the oars, and under the situation of line voltage transient fluctuation; Pitch-controlled system can keep operate as normal, and pitch-controlled system must have the back-up source of oneself.As shown in Figure 1, generally be on the dc bus of variable pitch driver, to pass through backup battery groups 12 of diode 11 parallel connections, during the blower fan operate as normal, backup battery group 12 is in charged state.When grid cut-off or other reasons caused electric network electric voltage drop, pitch-controlled system just automatically switched to 12 power supplies of backup battery group.Power system restoration just often reverts to mains supply more automatically.Can seamless switching between two kinds of power supplies, do not have time-delay and impact.
In wind power pitch-controlled system, existing charger charging performance is unstable, and cost is higher, in today of the general cost squeeze of wind-powered electricity generation industry, obviously is difficult to large-scale promotion.
Summary of the invention
The present invention has proposed a kind of lithium battery group charger of wind power pitch-controlled system in order to solve this technical problem.
The object of the invention will be achieved through following technical scheme:
The lithium battery group charger of wind power pitch-controlled system; Said lithium battery group charger comprises a switching power circuit; The constant current pressure limiting circuit parallelly connected with said switching power circuit; Control unit parallelly connected with said constant current pressure limiting circuit and the sampling protective circuit parallelly connected with said constant current pressure limiting circuit, said sampling protective circuit is connected with said control unit.
Further, the lithium battery group charger of the above wind power pitch-controlled system, wherein, the Switching Power Supply of described switching power circuit is the Switching Power Supply with PWM chip of pulse width modulation port.
Beneficial effect of the present invention is mainly reflected in: the stable performance of lithium battery group charger, charging is insisted on for a long time, can better satisfy the requirement that the wind electricity change paddle back-up source frequently discharges and recharges and reliability requirement is high.
Description of drawings
Fig. 1 is the circuit diagram of stand-by power supply device of the wind power pitch-controlled system of prior art.
Fig. 2 is the stand-by power supply manipulated or operated apparatus of the wind power pitch-controlled system of embodiment of the present invention.
Fig. 3 is the circuit diagram of lithium battery group.
Fig. 4 is lithium battery group charger circuit figure of the present invention.
Fig. 5 is a switching power circuit internal circuit diagram in the embodiment.
Fig. 6 is soft buffer circuit figure of overcurrent-overvoltage in the embodiment.
Embodiment
The lithium battery group charger of wind power pitch-controlled system; As shown in Figure 4; Said lithium battery group charger comprises a switching power circuit 221; The constant current pressure limiting circuit 222 parallelly connected with said switching power circuit 221, control unit parallelly connected and the sampling protective circuit 223 parallelly connected with said constant current pressure limiting circuit 222 with said constant current pressure limiting circuit 222, said sampling protective circuit 223 is connected with said control unit.
As shown in Figure 5, the Switching Power Supply of described switching power circuit is that Switching Power Supply, charge fault with PWM chip 2212 of pulse width modulation port are restarted switch 2210, and soft buffer circuit 2211 formed.Utilize the pulse width modulation port of PWM chip 2212, realize soft of lithium cell charging and fault, improved the reliability that lithium battery uses.
As shown in Figure 6, in lithium battery group charger set inside soft buffer circuit of specific overcurrent-overvoltage arranged, compare through the overcurrent of crossing current circuit 1; The overvoltage of overvoltage circuit 2 relatively; If lithium battery group charger detects the overcurrent-overvoltage fault, close PWM chip 2212 through trigger 3 at once, touch to put through CPU set again and thought highly of; And meter restarts number of times, just no longer restarts lithium battery group charger if restart the safety value that number of times arrive to set.When restarting lithium battery group charger; Restart at charge fault on the pipe of switch 2210 and be connected in series a RC buffer circuit; The pulse width modulation port voltage of PWM chip 2212 will rise along the RC charging curve, and the output voltage of lithium battery group charger also will rise along the RC charging curve, has so just reached soft purpose; Reduce impact, further guaranteed the charging safety of lithium battery group.
As shown in Figure 2, the stand-by power supply device in the wind power pitch-controlled system comprises that one electrically connects the diode 21 of power supply dc bus, the lithium battery group 20 of connecting with diode 21, and the lithium battery group charger 22 parallelly connected with lithium battery group 20.
As shown in Figure 3, it is 216V/7.2Ah that said lithium battery group is composed in series specification by 18 battery blocks, and each battery block is 12V, is made up of four electric cores.Certainly, also can require to carry out the combination of battery block according to different voltages with different grade and discharge capacity, for keeping consistency, each battery block be furnished with the charging equalizer circuit.
The lithium battery specific volume is big, and the life-span is long, and cost is low; Pollution-free, be wind power pitch-controlled system back-up source ideal alternative comparatively in the prior art, this programme adopts novel lithium battery electrode material LiFePO4; Compare with other lithium battery material; Price is lower, and the life-span is longer, and has overcome the shortcoming that lithium battery can burn and explode under extreme case.Ferric phosphate lithium cell 1C charges and discharge cycle life and can reach 2000 times, and single battery overcharged voltage 30V does not burn, and puncture is not exploded, and ferric phosphate lithium cell more is prone to series connection to be used, and satisfies the requirement that the wind electricity change paddle back-up source frequently discharges and recharges and reliability requirement is high more.
The present invention still has numerous embodiments, and all employing equivalents or equivalent transformation and all technical schemes of forming all drop within protection scope of the present invention.
Claims (2)
1. the lithium battery group charger of wind power pitch-controlled system; It is characterized in that: said lithium battery group charger comprises a switching power circuit; The constant current pressure limiting circuit parallelly connected with said switching power circuit; Control unit parallelly connected with said constant current pressure limiting circuit and the sampling protective circuit parallelly connected with said constant current pressure limiting circuit, said sampling protective circuit is connected with said control unit.
2. the lithium battery group charger of wind power pitch-controlled system as claimed in claim 1, it is characterized in that: the Switching Power Supply of described switching power circuit is the Switching Power Supply with PWM chip of pulse width modulation port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101573401A CN102832681A (en) | 2011-06-13 | 2011-06-13 | Lithium battery pack charger of wind power pitch system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101573401A CN102832681A (en) | 2011-06-13 | 2011-06-13 | Lithium battery pack charger of wind power pitch system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102832681A true CN102832681A (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101573401A Pending CN102832681A (en) | 2011-06-13 | 2011-06-13 | Lithium battery pack charger of wind power pitch system |
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| CN (1) | CN102832681A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066680A (en) * | 2011-10-20 | 2013-04-24 | 苏州能健电气有限公司 | Back-up source charging circuit of alternating current driver |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002010514A (en) * | 2000-06-16 | 2002-01-11 | Matsushita Electric Ind Co Ltd | Constant current, constant voltage, and constant current charger |
| CN101572431A (en) * | 2009-06-09 | 2009-11-04 | 湖南科力远高技术控股有限公司 | Continuous control-based constant-current restricted-voltage control system |
| CN202121367U (en) * | 2011-06-13 | 2012-01-18 | 苏州能健电气有限公司 | Lithium battery pack charger of wind-power pitch control system |
-
2011
- 2011-06-13 CN CN2011101573401A patent/CN102832681A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002010514A (en) * | 2000-06-16 | 2002-01-11 | Matsushita Electric Ind Co Ltd | Constant current, constant voltage, and constant current charger |
| CN101572431A (en) * | 2009-06-09 | 2009-11-04 | 湖南科力远高技术控股有限公司 | Continuous control-based constant-current restricted-voltage control system |
| CN202121367U (en) * | 2011-06-13 | 2012-01-18 | 苏州能健电气有限公司 | Lithium battery pack charger of wind-power pitch control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066680A (en) * | 2011-10-20 | 2013-04-24 | 苏州能健电气有限公司 | Back-up source charging circuit of alternating current driver |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121219 |