CN104184199A - Cell charging circuit and device - Google Patents
Cell charging circuit and device Download PDFInfo
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- CN104184199A CN104184199A CN201310193939.XA CN201310193939A CN104184199A CN 104184199 A CN104184199 A CN 104184199A CN 201310193939 A CN201310193939 A CN 201310193939A CN 104184199 A CN104184199 A CN 104184199A
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Abstract
The invention belongs to the circuit field, and provides a cell charging circuit and device. According to the cell charging circuit and device, a positive cell group can be charged through a positive cell group charging module during the positive half period of an alternating current, and a negative cell group can be charged through a negative cell group charging module during the negative half period of the alternating current, so that the periodical change characteristics of current direction of the alternating current are effectively utilized; the cell can be charged within the positive and negative half periods, so that electric energy is effectively utilized, energy sources are saved; and the cell charging circuit is formed only by the positive cell group charging module and the negative cell group charging module, so that the structure is simple and the cost is saved.
Description
Technical field
The invention belongs to circuit field, relate in particular to a kind of battery charger and device.
Background technology
Energy-conserving and environment-protective are main flows of world today's industry development, and rechargeable battery has not only been saved the energy and also effectively controlled environmental pollution.
Yet, in prior art, rechargeable battery being charged is all to carry out under alternating current condition, and AC current direction is periodically variable, that is to say, charging circuit of the prior art is all that the positive half period at alternating current charges to battery, and negative half-cycle does not effectively utilize, be unfavorable for like this energy-conserving and environment-protective, even by changing, circuit is realized alternating current positive half period and negative half-cycle all charges to battery, circuit structure also can be very complicated, is unfavorable for cost-saving.
Summary of the invention
The invention provides a kind of battery charger, be intended to solve existing battery charger and can not effectively utilize alternating current negative half-cycle to charge to battery and circuit structure complexity, be unfavorable for energy-conserving and environment-protective and cost-saving problem.
In order to solve the problems of the technologies described above, the present invention is achieved in that a kind of battery charger, is connected with transformer secondary output, and described battery charger comprises:
Positive battery group charging module, is connected with transformer, for align battery pack in alternating current positive half period, charges;
Negative battery group charging module, is connected with transformer, for negative battery group being charged in alternating current negative half-cycle.
Further, described positive battery group charging module comprises:
Diode D1, light-emitting diode D2, voltage-stabiliser tube D3, resistance R 1, resistance R 2, resistance R 3, resistance R 4, the first switching tube, second switch pipe;
The anode of described diode D1 is connected with the first end of described transformer secondary output, the negative electrode of described diode D1 is connected with the first end of described resistance R 2 with the first end of described resistance R 1 respectively, the second end of described resistance R 2 respectively with the first end of described resistance R 3 and the anodic bonding of described light-emitting diode D2, the second end of described resistance R 3 is connected with the cold end of described the first switching tube respectively with the negative electrode of described light-emitting diode D2, the control end of described the first switching tube is connected with the hot end of described second switch pipe, described resistance R 4 is connected between the second end of described resistance R 1 and the control end of described second switch pipe, the negative electrode of described voltage-stabiliser tube D3 is connected with the second end of described resistance R 1, the anode of described voltage-stabiliser tube D3 is connected with described negative battery group charging module, the cold end of the hot end of described the first switching tube and described second switch pipe is connected with the positive pole of positive battery group respectively, the negative pole of described positive battery group is connected with the second end of described transformer secondary output.
Further, described negative battery group charging module comprises:
Diode D4, light-emitting diode D5, voltage-stabiliser tube D6, resistance R 5, resistance R 6, resistance R 7, resistance R 8, the 3rd switching tube, the 4th switching tube;
The negative electrode of described diode D4 is connected with the first end of described transformer secondary output, the anode of described diode D4 respectively with the first end of described resistance R 5, the negative electrode of the first end of described resistance R 7 and described light-emitting diode D5 connects, the second end of described resistance R 5 and the anodic bonding of described voltage-stabiliser tube D6, the negative electrode of described voltage-stabiliser tube D6 respectively with the first end of described resistance R 8 and the anodic bonding of described voltage-stabiliser tube D3, the second end of described resistance R 8 is connected with the control end of described the 3rd switching tube, the hot end of described the 3rd switching tube is connected with the control end of described the 4th switching tube, the cold end of described the 4th switching tube is connected with the second end of described resistance R 7, described resistance R 6 is connected between the second end of described resistance R 7 and the anode of described light-emitting diode D5, the hot end of the cold end of described the 3rd switching tube and described the 4th switching tube is connected with the negative pole of negative battery group respectively, the positive pole of described negative battery group is connected with the second end of described transformer secondary output.
Further, described the first switching tube adopts positive-negative-positive triode Q1, the base stage of described positive-negative-positive triode Q1 is the control end of the first switching tube, the current collection of described positive-negative-positive triode Q1 is the hot end of the first switching tube very, and the transmitting of described positive-negative-positive triode Q1 is the cold end of the first switching tube very;
Described second switch pipe adopts NPN type triode Q2, the base stage of described NPN type triode Q2 is the control end of second switch pipe, the current collection of described NPN type triode Q2 is the hot end of second switch pipe very, and the transmitting of described NPN type triode Q2 is the cold end of second switch pipe very.
Further, described the 3rd switching tube adopts positive-negative-positive triode Q3, the base stage of described positive-negative-positive triode Q3 is the control end of the 3rd switching tube, the current collection of described positive-negative-positive triode Q3 is the hot end of the 3rd switching tube very, and the transmitting of described positive-negative-positive triode Q3 is the cold end of the 3rd switching tube very;
Described the 4th switching tube adopts NPN type triode Q4, the base stage of described NPN type triode Q4 is the control end of the 4th switching tube, the current collection of described NPN type triode Q4 is the hot end of the 4th switching tube very, and the transmitting of described NPN type triode Q4 is the cold end of the 4th switching tube very.
Further, described the first switching tube adopts P type metal-oxide-semiconductor Q5, the grid of described P type metal-oxide-semiconductor Q5 is the control end of the first switching tube, and the drain electrode of described P type metal-oxide-semiconductor Q5 is the hot end of the first switching tube, and the source electrode of described P type metal-oxide-semiconductor Q5 is the cold end of the first switching tube;
Described second switch pipe adopts N-type metal-oxide-semiconductor Q6, and the grid of described N-type metal-oxide-semiconductor Q6 is the control end of second switch pipe, and the drain electrode of described N-type metal-oxide-semiconductor Q6 is the hot end of second switch pipe, and the source electrode of described N-type metal-oxide-semiconductor Q6 is the cold end of second switch pipe.
Further, described the 3rd switching tube adopts P type metal-oxide-semiconductor Q7, the grid of described P type metal-oxide-semiconductor Q7 is the control end of the 3rd switching tube, and the drain electrode of described P type metal-oxide-semiconductor Q7 is the hot end of the 3rd switching tube, and the source electrode of described P type metal-oxide-semiconductor Q7 is the cold end of the 3rd switching tube;
Described the 4th switching tube adopts N-type metal-oxide-semiconductor Q8, and the grid of described N-type metal-oxide-semiconductor Q8 is the control end of the 4th switching tube, and the drain electrode of described N-type metal-oxide-semiconductor Q8 is the hot end of the 4th switching tube, and the source electrode of described N-type metal-oxide-semiconductor Q8 is the cold end of the 4th switching tube.
The present invention also provides a kind of battery charger, and described battery charger comprises above-mentioned battery charger.
In the present invention, can when alternating current positive half period, by positive battery group charging module, to positive battery group, charge, when alternating current negative half-cycle, by negative battery group charging module, to negative battery group, charge, effectively utilize the periodically variable feature of AC current direction, in positive and negative half period, can charge to battery, effectively utilized electric energy, saved the energy, and battery charger is only comprised of positive battery group charging module and negative battery group charging module, simple in structure, cost-saving.
Accompanying drawing explanation
Fig. 1 is the modular structure figure of the battery charger that provides of the embodiment of the present invention;
Fig. 2 is the positive battery group charging module that provides of the embodiment of the present invention and the circuit structure diagram of negative battery group charging module;
Fig. 3 is the circuit structure diagram of the battery charger that provides of first embodiment of the invention;
Fig. 4 is the circuit structure diagram of the battery charger that provides of second embodiment of the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with specific embodiment, specific implementation of the present invention is described in detail:
Fig. 1 shows the modular structure of the battery charger that the embodiment of the present invention provides, and for convenience of explanation, only enumerates the part relevant to the present embodiment.
As shown in Figure 1, battery charger is connected with the secondary of transformer T1, comprising:
Positive battery group charging module 101, T1 is connected with transformer, for align battery pack BT1 in alternating current positive half period, charges;
Negative battery group charging module 102, T1 is connected with transformer, for negative battery group being charged in alternating current negative half-cycle.
Fig. 2 shows positive battery group charging module that the embodiment of the present invention provides and the circuit structure of negative battery group charging module.
As one embodiment of the invention, positive battery group charging module 101 comprises:
Diode D1, light-emitting diode D2, voltage-stabiliser tube D3, resistance R 1, resistance R 2, resistance R 3, resistance R 4, the first switching tube 1011, second switch pipe 1012;
The anode of diode D1 is connected with the secondary first end of transformer T1, the negative electrode of diode D1 is connected with the first end of resistance R 2 with the first end of resistance R 1 respectively, the second end of resistance R 2 respectively with the first end of resistance R 3 and the anodic bonding of light-emitting diode D2, the second end of resistance R 3 is connected with the cold end of the first switching tube 1011 respectively with the negative electrode of light-emitting diode D2, the control end of the first switching tube 1011 is connected with the hot end of second switch pipe 1012, resistance R 4 is connected between the second end of resistance R 1 and the control end of second switch pipe 1012, the negative electrode of voltage-stabiliser tube D3 is connected with the second end of resistance R 1, the anode of voltage-stabiliser tube D3 is connected with negative battery group charging module 102, the cold end of the hot end of the first switching tube 1011 and second switch pipe 1012 is connected with the positive pole of positive battery group BT1 respectively, the negative pole of positive battery group BT1 is connected with the second secondary end of transformer T1.
As one embodiment of the invention, negative battery group charging module 102 comprises:
Diode D4, light-emitting diode D5, voltage-stabiliser tube D6, resistance R 5, resistance R 6, resistance R 7, resistance R 8, the 3rd switching tube 1021, the 4th switching tube 1022;
The negative electrode of diode D4 is connected with the secondary first end of transformer T1, the anode of diode D4 respectively with the first end of resistance R 5, the negative electrode of the first end of resistance R 7 and light-emitting diode D5 connects, the second end of resistance R 5 and the anodic bonding of voltage-stabiliser tube D6, the negative electrode of voltage-stabiliser tube D6 respectively with the first end of resistance R 8 and the anodic bonding of voltage-stabiliser tube D3, the second end of resistance R 8 is connected with the control end of the 3rd switching tube 1021, the hot end of the 3rd switching tube 1021 is connected with the control end of the 4th switching tube 1022, the cold end of the 4th switching tube 1022 is connected with the second end of resistance R 7, resistance R 6 is connected between the second end of resistance R 7 and the anode of light-emitting diode D5, the hot end of the cold end of the 3rd switching tube 1021 and the 4th switching tube 1022 is connected with the negative pole of negative battery group BT2 respectively, the positive pole of negative battery group BT2 is connected with the second secondary end of transformer T1.
embodiment mono-:
Fig. 3 shows the circuit structure of the battery charger that first embodiment of the invention provides, and for convenience of explanation, only enumerates the part relevant to the first embodiment.
As one embodiment of the invention, the first switching tube 1011 adopts positive-negative-positive triode Q1, the base stage of positive-negative-positive triode Q1 is the control end of the first switching tube 1011, the current collection of positive-negative-positive triode Q1 is the hot end of the first switching tube 1011 very, and the transmitting of positive-negative-positive triode Q1 is the cold end of the first switching tube 1011 very;
Second switch pipe 1012 adopts NPN type triode Q2, the base stage of NPN type triode Q2 is the control end of second switch pipe 1012, the current collection of NPN type triode Q2 is the hot end of second switch pipe 1012 very, and the transmitting of NPN type triode Q2 is the cold end of second switch pipe 1012 very.
As one embodiment of the invention, the 3rd switching tube 1021 adopts positive-negative-positive triode Q3, the base stage of positive-negative-positive triode Q3 is the control end of the 3rd switching tube 1021, the current collection of positive-negative-positive triode Q3 is the hot end of the 3rd switching tube 1021 very, and the transmitting of positive-negative-positive triode Q3 is the cold end of the 3rd switching tube 1021 very;
The 4th switching tube 1022 adopts NPN type triode Q4, the base stage of NPN type triode Q4 is the control end of the 4th switching tube 1022, the current collection of NPN type triode Q4 is the hot end of the 4th switching tube 1022 very, and the transmitting of NPN type triode Q4 is the cold end of the 4th switching tube 1022 very.
First embodiment of take below describes the operation principle of battery charger provided by the invention as basis.
Battery charger is divided into positive battery group charging module and negative battery group charging module, and circuit is symmetrical.The elementary city's alternating current that connects of transformer T1, secondary same output AC electricity, its positive half period and negative half-cycle are respectively positive battery group BT1 and negative battery group BT2 charging.Positive half period is through diode D1 rectification Hou Yi road through resistance R 1, and a peak pulse of voltage-stabiliser tube D3 output is as reference voltage; Another road electric current charges to positive battery group BT1 through resistance R 3, positive-negative-positive triode Q1.NPN type triode Q2, positive-negative-positive triode Q1 form composite pipe circuit, and reference voltage is connected in the base stage of NPN type triode Q2 by resistance R 4.When positive battery group BT1 discharged and not during full charge the base potential of NPN type triode Q2 higher than emitter current potential, form positive bias.Positive-negative-positive triode Q1 and NPN type triode Q2 saturation conduction.When having charging current, the pressure drop of resistance R 3 is lighted light-emitting diode D2.
When charging current reaches the mean value of pulse current, the peak value of pulse current can be up to the more than 3 times of mean value.Along with the rising of the cell voltage of positive battery group BT1, positive-negative-positive triode Q1 and NPN type triode Q2 exit saturation condition and enter magnification region, and charging current reduces, when the cell voltage of positive battery group BT1 approaches the voltage of voltage-stabiliser tube D3.Positive-negative-positive triode Q1 and NPN type triode Q2 approach cut-off, and the charging current of positive battery group BT1 is reduced to trickle charge, until the cell voltage of positive battery group BT1 is full of completely.
The circuit structure that fills the electric module 101 of group due to negative battery group charging module 102 and positive battery is identical, just utilizes the negative half-cycle of alternating current to charge, and its operation principle is identical, at this, just no longer states explanation.
embodiment bis-:
Fig. 4 shows the circuit structure of the battery charger that second embodiment of the invention provides, and for convenience of explanation, only enumerates the part relevant to the second embodiment.
As one embodiment of the invention, the first switching tube 1011 adopts P type metal-oxide-semiconductor Q5, the grid of P type metal-oxide-semiconductor Q5 is the control end of the first switching tube 1011, and the drain electrode of P type metal-oxide-semiconductor Q5 is the hot end of the first switching tube 1011, and the source electrode of P type metal-oxide-semiconductor Q5 is the cold end of the first switching tube 1011;
Second switch pipe 1012 adopts N-type metal-oxide-semiconductor Q6, and the grid of N-type metal-oxide-semiconductor Q6 is the control end of second switch pipe 1012, and the drain electrode of N-type metal-oxide-semiconductor Q6 is the hot end of second switch pipe 1012, and the source electrode of N-type metal-oxide-semiconductor Q6 is the cold end of second switch pipe 1012.
As one embodiment of the invention, the 3rd switching tube 1021 adopts P type metal-oxide-semiconductor Q7, the grid of P type metal-oxide-semiconductor Q7 is the control end of the 3rd switching tube 1021, and the drain electrode of P type metal-oxide-semiconductor Q7 is the hot end of the 3rd switching tube 1021, and the source electrode of P type metal-oxide-semiconductor Q7 is the cold end of the 3rd switching tube 1021;
The 4th switching tube 1022 adopts N-type metal-oxide-semiconductor Q8, and the grid of N-type metal-oxide-semiconductor Q8 is the control end of the 4th switching tube 1022, and the drain electrode of N-type metal-oxide-semiconductor Q8 is the hot end of the 4th switching tube 1022, and the source electrode of N-type metal-oxide-semiconductor Q8 is the cold end of the 4th switching tube 1022.
In first embodiment of the invention and the second embodiment, the first switching tube and the 3rd switching tube can be used positive-negative-positive triode or P type metal-oxide-semiconductor, second switch pipe and the 4th switching tube can be used NPN type triode and N-type metal-oxide-semiconductor, and these four switching tubes can combined hybrid be used.
The embodiment of the present invention also provides a kind of battery charger, and battery charger comprises above-mentioned battery charger.
In embodiments of the present invention, can when alternating current positive half period, by positive battery group charging module, to positive battery group, charge, when alternating current negative half-cycle, by negative battery group charging module, to negative battery group, charge, effectively utilized the periodically variable feature of AC current direction, in positive and negative half period, can charge to battery, effectively utilized electric energy, saved the energy, and battery charger is only comprised of positive battery group charging module and negative battery group charging module, simple in structure, cost-saving.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a battery charger, is connected with transformer secondary output, it is characterized in that, described battery charger comprises:
Positive battery group charging module, is connected with transformer, for align battery pack in alternating current positive half period, charges;
Negative battery group charging module, is connected with transformer, for negative battery group being charged in alternating current negative half-cycle.
2. battery charger as claimed in claim 1, is characterized in that, described positive battery group charging module comprises:
Diode D1, light-emitting diode D2, voltage-stabiliser tube D3, resistance R 1, resistance R 2, resistance R 3, resistance R 4, the first switching tube, second switch pipe;
The anode of described diode D1 is connected with the first end of described transformer secondary output, the negative electrode of described diode D1 is connected with the first end of described resistance R 2 with the first end of described resistance R 1 respectively, the second end of described resistance R 2 respectively with the first end of described resistance R 3 and the anodic bonding of described light-emitting diode D2, the second end of described resistance R 3 is connected with the cold end of described the first switching tube respectively with the negative electrode of described light-emitting diode D2, the control end of described the first switching tube is connected with the hot end of described second switch pipe, described resistance R 4 is connected between the second end of described resistance R 1 and the control end of described second switch pipe, the negative electrode of described voltage-stabiliser tube D3 is connected with the second end of described resistance R 1, the anode of described voltage-stabiliser tube D3 is connected with described negative battery group charging module, the cold end of the hot end of described the first switching tube and described second switch pipe is connected with the positive pole of positive battery group respectively, the negative pole of described positive battery group is connected with the second end of described transformer secondary output.
3. battery charger as claimed in claim 1, is characterized in that, described negative battery group charging module comprises:
Diode D4, light-emitting diode D5, voltage-stabiliser tube D6, resistance R 5, resistance R 6, resistance R 7, resistance R 8, the 3rd switching tube, the 4th switching tube;
The negative electrode of described diode D4 is connected with the first end of described transformer secondary output, the anode of described diode D4 respectively with the first end of described resistance R 5, the negative electrode of the first end of described resistance R 7 and described light-emitting diode D5 connects, the second end of described resistance R 5 and the anodic bonding of described voltage-stabiliser tube D6, the negative electrode of described voltage-stabiliser tube D6 respectively with the first end of described resistance R 8 and the anodic bonding of described voltage-stabiliser tube D3, the second end of described resistance R 8 is connected with the control end of described the 3rd switching tube, the hot end of described the 3rd switching tube is connected with the control end of described the 4th switching tube, the cold end of described the 4th switching tube is connected with the second end of described resistance R 7, described resistance R 6 is connected between the second end of described resistance R 7 and the anode of described light-emitting diode D5, the hot end of the cold end of described the 3rd switching tube and described the 4th switching tube is connected with the negative pole of negative battery group respectively, the positive pole of described negative battery group is connected with the second end of described transformer secondary output.
4. battery charger as claimed in claim 2, it is characterized in that, described the first switching tube adopts positive-negative-positive triode Q1, the base stage of described positive-negative-positive triode Q1 is the control end of the first switching tube, the current collection of described positive-negative-positive triode Q1 is the hot end of the first switching tube very, and the transmitting of described positive-negative-positive triode Q1 is the cold end of the first switching tube very;
Described second switch pipe adopts NPN type triode Q2, the base stage of described NPN type triode Q2 is the control end of second switch pipe, the current collection of described NPN type triode Q2 is the hot end of second switch pipe very, and the transmitting of described NPN type triode Q2 is the cold end of second switch pipe very.
5. battery charger as claimed in claim 3, it is characterized in that, described the 3rd switching tube adopts positive-negative-positive triode Q3, the base stage of described positive-negative-positive triode Q3 is the control end of the 3rd switching tube, the current collection of described positive-negative-positive triode Q3 is the hot end of the 3rd switching tube very, and the transmitting of described positive-negative-positive triode Q3 is the cold end of the 3rd switching tube very;
Described the 4th switching tube adopts NPN type triode Q4, the base stage of described NPN type triode Q4 is the control end of the 4th switching tube, the current collection of described NPN type triode Q4 is the hot end of the 4th switching tube very, and the transmitting of described NPN type triode Q4 is the cold end of the 4th switching tube very.
6. battery charger as claimed in claim 2, it is characterized in that, described the first switching tube adopts P type metal-oxide-semiconductor Q5, the grid of described P type metal-oxide-semiconductor Q5 is the control end of the first switching tube, the drain electrode of described P type metal-oxide-semiconductor Q5 is the hot end of the first switching tube, and the source electrode of described P type metal-oxide-semiconductor Q5 is the cold end of the first switching tube;
Described second switch pipe adopts N-type metal-oxide-semiconductor Q6, and the grid of described N-type metal-oxide-semiconductor Q6 is the control end of second switch pipe, and the drain electrode of described N-type metal-oxide-semiconductor Q6 is the hot end of second switch pipe, and the source electrode of described N-type metal-oxide-semiconductor Q6 is the cold end of second switch pipe.
7. battery charger as claimed in claim 3, it is characterized in that, described the 3rd switching tube adopts P type metal-oxide-semiconductor Q7, the grid of described P type metal-oxide-semiconductor Q7 is the control end of the 3rd switching tube, the drain electrode of described P type metal-oxide-semiconductor Q7 is the hot end of the 3rd switching tube, and the source electrode of described P type metal-oxide-semiconductor Q7 is the cold end of the 3rd switching tube;
Described the 4th switching tube adopts N-type metal-oxide-semiconductor Q8, and the grid of described N-type metal-oxide-semiconductor Q8 is the control end of the 4th switching tube, and the drain electrode of described N-type metal-oxide-semiconductor Q8 is the hot end of the 4th switching tube, and the source electrode of described N-type metal-oxide-semiconductor Q8 is the cold end of the 4th switching tube.
8. a battery charger, is characterized in that, described battery charger comprises the battery charger as described in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310193939.XA CN104184199B (en) | 2013-05-22 | 2013-05-22 | Cell charging circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310193939.XA CN104184199B (en) | 2013-05-22 | 2013-05-22 | Cell charging circuit and device |
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| CN104184199A true CN104184199A (en) | 2014-12-03 |
| CN104184199B CN104184199B (en) | 2017-02-08 |
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| CN201310193939.XA Active CN104184199B (en) | 2013-05-22 | 2013-05-22 | Cell charging circuit and device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042252U (en) * | 1988-08-27 | 1989-08-02 | 北京市农机研究所 | Dual-output electric charger |
| JP2001078368A (en) * | 1999-08-13 | 2001-03-23 | Sb Power Tool Co | Battery charger with charging current amplifying circuit |
| CN201032688Y (en) * | 2006-11-01 | 2008-03-05 | 周海 | Positive and negative pulse charger |
| CN102810897A (en) * | 2011-05-30 | 2012-12-05 | 海洋王照明科技股份有限公司 | Charging circuit with short-circuit protection and charger |
-
2013
- 2013-05-22 CN CN201310193939.XA patent/CN104184199B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042252U (en) * | 1988-08-27 | 1989-08-02 | 北京市农机研究所 | Dual-output electric charger |
| JP2001078368A (en) * | 1999-08-13 | 2001-03-23 | Sb Power Tool Co | Battery charger with charging current amplifying circuit |
| CN201032688Y (en) * | 2006-11-01 | 2008-03-05 | 周海 | Positive and negative pulse charger |
| CN102810897A (en) * | 2011-05-30 | 2012-12-05 | 海洋王照明科技股份有限公司 | Charging circuit with short-circuit protection and charger |
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| CN104184199B (en) | 2017-02-08 |
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