CN104079012A - Charging indication circuit, charging circuit and electronic equipment - Google Patents
Charging indication circuit, charging circuit and electronic equipment Download PDFInfo
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- CN104079012A CN104079012A CN201310097457.4A CN201310097457A CN104079012A CN 104079012 A CN104079012 A CN 104079012A CN 201310097457 A CN201310097457 A CN 201310097457A CN 104079012 A CN104079012 A CN 104079012A
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Abstract
The invention discloses a charging indication circuit which is connected between a charging power supply and a charging load, and comprises two binary state change units, wherein each binary state change unit presents two different states when charging current of the charging load is greater than a set threshold value and when the charging current of the charging load is smaller than the set threshold value; states presented by the two binary state change units when the charging current of the charging load is greater than or equal to the set current threshold value are combined for indicating a full state of the charging load; and states presented by the two binary state change units when the charging current of the charging load is less than the set current threshold value are combined for indicating a charging state of the charging load. The invention further discloses a charging circuit applying the charging indication circuit, and electronic equipment. The charging indication circuit, the charging circuit and the electronic equipment can indicate charging and full states of a battery, and the use is convenient.
Description
Technical field
The present invention relates to charging technique, particularly relate to a kind of charging indication, a kind of charging circuit and a kind of electronic equipment.
Background technology
Charger is of many uses in every field, is particularly widely used in the common electrical equipment of mobile phone, camera etc. at sphere of life.Charger is to adopt power electronics semiconductor device, and voltage and the changeless alternating current of frequency are transformed to galvanic a kind of static ac dc converter device.Taking storage battery as working power or the electricity consumption occasion of stand-by power supply, charger is with a wide range of applications.
Charger can be divided into a variety of according to charging object, as lead acid batteries charger, electricity charger for Ni-Cd battery, nickel-metal hydride battery charger and charger for lithium ion battery etc.Can be divided into again common charger, onboard charger etc. according to use occasion.
Charger be all substantially by a stabilized power supply add necessary constant current, pressure limiting, the control circuit such as prescribe a time limit forms.In the time of design charger, need to consider the many-sides such as counnter attack refluence, anti-reverse, anti-short circuit, anti-overvoltage and anti-overflow.
Due to the many designs aspect charging security, therefore some charger, in the time that battery is charged, does not have the mechanism whether pilot cell is full of at present, and owing to generally not worrying overcharging, battery will be full of after charging time enough.But use this charger whether to be full of by general estimation battery of charging interval, therefore use comparatively inconvenience.
Some charger provides and is full of electricity instruction, but only adopts an indicator light to complete, and for example, while charging, lamp goes out, and while being full of, lamp is bright, or contrary.If indicator light damages, can obtain wrong instruction.
Summary of the invention
Based on this, be necessary to provide a kind of charging indication that can indicate charged state.
In addition, also provide a kind of charging circuit.
Finally, also provide a kind of electronic equipment.
A kind of charging indication, for being connected between charge power supply and charging load, comprises the first binary condition change unit and the second binary condition change unit; Described the first binary condition change unit in the time that the charging current of charging load is more than or equal to the current threshold of described setting in the first state, in the time that the charging current of charging load is less than the current threshold of described setting in the second state; Described the second binary condition change unit in the time that the charging current of charging load is more than or equal to the current threshold of described setting in the third state, in the time that the charging current of charging load is less than the current threshold of described setting in the 4th state; In the time that the charging current of charging load is more than or equal to the current threshold of described setting, the combinations of states that described the first binary condition change unit and the second binary condition change unit present is used to indicate the full state of charging load; In the time that the charging current of charging load is less than the current threshold of described setting, what the combinations of states that described the first binary condition change unit and the second binary condition change unit present was used to indicate charging load is filling state.
In an embodiment, described the first binary condition change unit and the second binary condition change unit are in series or in parallel with each other therein.
Therein in an embodiment, after described the first binary condition change unit and the second binary condition change unit parallel connection, connect with the first resistance and be connected to the charge power supply two ends of input.
Therein in an embodiment, described the first binary condition change unit comprises the second resistance and first indicator light of series connection, extinguishing of corresponding described first indicator light of the first state of described the first binary condition change unit, the lighting of corresponding described the first indicator light of the second state.
In an embodiment, described the second binary condition change unit comprises the 3rd resistance, switching tube and the second indicator light therein; The positive pole of described charge power supply is connected with the input of switching tube, and is connected with the control end of switching tube by the 3rd resistance, and the output of switching tube connects described the second indicator light; Lighting of corresponding described the second indicator light of the third state of described the second binary condition change unit, the extinguishing of corresponding described the second indicator light of the 4th state.
In an embodiment, described the first indicator light is green LED lamp therein, and described the second indicator light is red LED lamp, and described switching tube is PNP triode.
In an embodiment, also comprise first electric capacity at the charge power supply two ends that are connected to input therein.
In an embodiment, also comprise the Schottky diode being connected on the anodal circuit of charge power supply therein.
A kind of charging circuit, comprising: voltage transformation module, can directly be loaded into the charge power supply in charging load for external power source is converted to; And above-mentioned charging indication; Described charging indication is connected between described voltage transformation module and charging load.
A kind of electronic equipment, comprising: charging inlet, for connecting the external charger that charge power supply is provided; Battery case, for holding battery, has the both positive and negative polarity contact touching with battery; And above-mentioned charging indication, be connected between the both positive and negative polarity contact of described charging inlet and described battery case.
Above-mentioned charging indication, charging circuit and electronic equipment, can by the combinations of states of the first binary condition change unit and the second binary condition change unit indicate respectively charging load filling state and full state, easy to use.
Brief description of the drawings
Fig. 1 is the charging indication module map of an embodiment;
Fig. 2 is the schematic diagram of charging indication embodiment illustrated in fig. 1;
Fig. 3 is the module map of the charging circuit of an embodiment;
Fig. 4 is the schematic diagram of charging circuit embodiment illustrated in fig. 3.
Embodiment
As shown in Figure 1, be the charging indication module map of an embodiment.This charging indication 10 is for being connected between charge power supply and charging load 20.Charging indication 10 comprises two binary condition change unit, is respectively the first binary condition change unit 102 and the second binary condition change unit 104.Each binary condition change unit 102,104 presents respectively two kinds of different states in the time that the charging current of charging load 20 is greater than or less than the current threshold of setting.
Concrete, be the first binary condition change unit 102 in the time that the charging current of charging load is more than or equal to the current threshold of described setting in the first state, in the time that the charging current of charging load is less than the current threshold of described setting in the second state.
The second binary condition change unit 104 in the time that the charging current of charging load is more than or equal to the current threshold of described setting in the third state, in the time that the charging current of charging load is less than the current threshold of described setting in the 4th state.
Therefore, in the time that the charging current of charging load 20 is more than or equal to default current threshold, the first binary condition change unit 102 in the first state, the second binary condition change unit 104 in the third state, two binary condition change unit 102,104 are in a kind of definite assembled state, and this assembled state is used to indicate battery electric quantity and is full of.Similarly, in the time that the charging current of charging load 20 is less than default current threshold, the first binary condition change unit 102 in the second state, the second binary condition change unit 104 in the 4th state, two binary condition change unit 102,104 are in the definite assembled state of another kind, and this assembled state is used to indicate also underfill of battery electric quantity.
Also,, in the time that the charging current of charging load 20 is more than or equal to the current threshold of described setting, the combinations of states that described two binary condition change unit 102,104 present is used to indicate the full state of charging load 20; Be less than the current threshold of described setting in the charging current of charging load 20, what the combinations of states that described two binary condition change unit 102,104 present was used to indicate charging load 20 is filling state.
Like this, can avoid single indicator light to damage the problem that obtains miscue.
The first binary condition change unit 102 and the second binary condition change unit 104 can be in series or in parallel with each other in concrete circuit.While mutually series connection, the two flows through identical electric current, and therefore the first binary condition change unit 102 and the second binary condition change unit 104 can adopt same circuits structure, but get different component parameters, thereby identical electric current is made to different responses.
Specifically in the present embodiment, as shown in Figure 2, this charging indication 10 comprises the first binary condition change unit 102 parallel with one another and the second binary condition change unit 104.And the first binary condition change unit 102 and the second binary condition change unit 104 rear charge power supply two ends of connecting with the first resistance R 1 and being connected to input in parallel.
The first binary condition change unit 102 comprises the second resistance R 2 and the first indicator light D1 of series connection.The second resistance R 2 is larger than the resistance of the first indicator light D1, can get larger voltage.By adjusting the resistance ratio of the second resistance R 2 and the first indicator light D1, the variation that can make the first indicator light D1 light or extinguish at charging current Near Threshold, is generally in the time that charging current exceedes threshold value, and the first indicator light D1 extinguishes, and in the time being less than threshold value, the first indicator light D1 lights.In the present embodiment, the first indicator light D1 is green LED lamp.
The second binary condition change unit 104 comprises the 3rd resistance R 3, switching tube Q1 and the second indicator light D2.The positive pole of charge power supply is connected with the input of switching tube Q1, and is connected with the control end of switching tube Q1 by the 3rd resistance R 3, and the output of switching tube Q1 connects the second indicator light D2.One end that resistance R 3 is connected with switching tube Q1 is as the positive pole that outputs to charging load.In the present embodiment, the second indicator light D2 is red LED lamp.Switching tube Q1 is PNP triode, its emitter as input, base stage as control end, collector electrode as output.
Be appreciated that in other embodiments, the first indicator light D1 and the second indicator light D2 can exchange color, or adopt other colour code.Switching tube Q1 can adopt other can realize the device of switch control functions.
Further, in the charging indication 10 of the present embodiment, also comprise first capacitor C 1 at the charge power supply two ends that are connected to input.The first capacitor C 1 is for filtering.
Further, in the charging indication 10 of the present embodiment, also comprise the Schottky diode being connected on the anodal circuit of charge power supply.In embodiment illustrated in fig. 1, comprise 2 Schottky diodes in parallel in the same way.Two Schottky diodes can increase the electric current that can bear.
The operation principle of foregoing circuit is below described.
In the time that charge power supply is charged to load, when load current is greater than charging current threshold value, the first indicator light D1 turns bright by going out, and the second indicator light D2 is gone out by bright turning.When load current is less than charging current threshold value, the first indicator light D1 is gone out by bright turning, and the second indicator light D2 turns bright by going out.
Specific as follows: in the time that load current is greater than charging current threshold value, because triode Q1 has enough large base current, triode Q1 conducting, the second indicator light D2 is bright.Simultaneously the resistance of the relative first indicator light D1 of resistance of the second resistance R 2 is larger, thereby the voltage of getting is also large, and the voltage of getting on the first indicator light D1 is from diminishing, and not enough so that the first indicator light D1 lights.
In the time that load current is less than charging current threshold value, because triode Q1 base current is very little, be less than the On current of triode Q1, triode Q1 cut-off, the second indicator light D2 extinguishes.Meanwhile, although the resistance of the second resistance R 2 is large, because the electric current of load has diminished, the voltage of getting in the second resistance R 2 also diminishes accordingly, and the first indicator light D1 voltage exceedes to be lighted required voltage and be lit.
As shown in Figure 3, be the charging circuit module figure of an embodiment.This charging circuit comprises the charging indication 10 that voltage transformation module 30 and above-described embodiment provide.Wherein voltage transformation module 30 can directly be loaded into the charge power supply in charging load 20 for external power source is converted to.20 of charging indications are connected between this voltage transformation module 30 and charging load 20.
As shown in Figure 4, voltage transformation module 30 comprises rectification and filter unit 310 and voltage-adjusting unit 320.Rectification and filter unit 310 carry out being input to voltage-adjusting unit 320 after rectification and filtering to the alternating current of input.Voltage-adjusting unit 320 carries out step-down processing by the voltage through over commutation and filtering and is adjusted into charging voltage and exports to charging load 20.
Rectification and filter unit 310 comprise rectifier bridge and electrochemical capacitor, and the input of described rectifier bridge is used for connecting AC power, and alternating current is carried out to full-wave rectification.The output that described electrochemical capacitor is connected to described rectifier bridge carries out filtering processing.
Voltage-adjusting unit 320 comprises switching power source chip, transformer and required peripheral components.Concrete required device and connected mode is shown in Fig. 4.The power end of switching power source chip is connected to by resistance the positive polarity that rectification and filter unit 310 are exported, pulse control end is connected to by the parallel circuits of resistance, diode and resistance and electric capacity the positive polarity that rectification and filter unit 310 are exported, and pulse control end is connection transformer input cathode simultaneously.Transformer input anode is connected with the positive polarity that rectification and filter unit 310 are exported.The voltage that wherein switching power source chip is input to transformer by pulse width modulation adjustment makes it keep stable, and transformer carries out step-down by high voltage and processes output.
Voltage transformation module 30 also comprises the feedback unit 330 that is connected to output.The feedback signal of feedback unit 330 sends to described switching power source chip.The feedback end of switching power source chip is connected with feedback unit 330.
The present invention also provides a kind of electronic equipment, and it comprises charging inlet for connecting the external charger that charge power supply is provided and for holding the battery case of battery.Battery case has the both positive and negative polarity contact touching with battery.
The charging indication that above-described embodiment provides can be connected between the both positive and negative polarity contact of described charging inlet and described battery case, thereby as the part of electronic equipment, for the battery of electronic equipment provides charging instruction.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a charging indication, for being connected between charge power supply and charging load, comprises the first binary condition change unit and the second binary condition change unit;
Described the first binary condition change unit in the time that the charging current of charging load is more than or equal to the current threshold of described setting in the first state, in the time that the charging current of charging load is less than the current threshold of described setting in the second state;
Described the second binary condition change unit in the time that the charging current of charging load is more than or equal to the current threshold of described setting in the third state, in the time that the charging current of charging load is less than the current threshold of described setting in the 4th state;
In the time that the charging current of charging load is more than or equal to the current threshold of described setting, the combinations of states that described the first binary condition change unit and the second binary condition change unit present is used to indicate the full state of charging load; In the time that the charging current of charging load is less than the current threshold of described setting, what the combinations of states that described the first binary condition change unit and the second binary condition change unit present was used to indicate charging load is filling state.
2. charging indication according to claim 1, is characterized in that, described the first binary condition change unit and the second binary condition change unit are in series or in parallel with each other.
3. charging indication according to claim 1, is characterized in that, connects and be connected to the charge power supply two ends of input after described the first binary condition change unit and the second binary condition change unit parallel connection with the first resistance.
4. charging indication according to claim 3, it is characterized in that, described the first binary condition change unit comprises the second resistance and first indicator light of series connection, extinguishing of corresponding described first indicator light of the first state of described the first binary condition change unit, the lighting of corresponding described the first indicator light of the second state.
5. charging indication according to claim 4, is characterized in that, described the second binary condition change unit comprises the 3rd resistance, switching tube and the second indicator light; The positive pole of described charge power supply is connected with the input of switching tube, and is connected with the control end of switching tube by the 3rd resistance, and the output of switching tube connects described the second indicator light; Lighting of corresponding described the second indicator light of the third state of described the second binary condition change unit, the extinguishing of corresponding described the second indicator light of the 4th state.
6. charging indication according to claim 5, is characterized in that, described the first indicator light is green LED lamp, and described the second indicator light is red LED lamp, and described switching tube is PNP triode.
7. charging indication according to claim 3, is characterized in that, also comprises first electric capacity at the charge power supply two ends that are connected to input.
8. charging indication according to claim 3, is characterized in that, also comprises the Schottky diode being connected on the anodal circuit of charge power supply.
9. a charging circuit, is characterized in that, comprising:
Voltage transformation module, can directly be loaded into the charge power supply in charging load for external power source is converted to; And
Charging indication as described in claim 1～8 any one;
Described charging indication is connected between described voltage transformation module and charging load.
10. an electronic equipment, comprising:
Charging inlet, for connecting the external charger that charge power supply is provided;
Battery case, for holding battery, has the both positive and negative polarity contact touching with battery; And
Charging indication as described in claim 1～8 any one, is connected between the both positive and negative polarity contact of described charging inlet and described battery case.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310097457.4A CN104079012B (en) | 2013-03-25 | 2013-03-25 | Charging indication, charging circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310097457.4A CN104079012B (en) | 2013-03-25 | 2013-03-25 | Charging indication, charging circuit and electronic equipment |
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| CN104079012A true CN104079012A (en) | 2014-10-01 |
| CN104079012B CN104079012B (en) | 2017-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106563260A (en) * | 2016-10-28 | 2017-04-19 | 深圳职业技术学院 | Table tennis intelligent motion system based on attitude sensor and computing method based on table tennis intelligent motion system |
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| CN104079012B (en) | 2017-12-01 |
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