CN104079012B - Charging indication, charging circuit and electronic equipment - Google Patents
Charging indication, charging circuit and electronic equipment Download PDFInfo
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- CN104079012B CN104079012B CN201310097457.4A CN201310097457A CN104079012B CN 104079012 B CN104079012 B CN 104079012B CN 201310097457 A CN201310097457 A CN 201310097457A CN 104079012 B CN104079012 B CN 104079012B
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Abstract
The present invention discloses a kind of charging indication, for being connected between charge power supply and charging load, including two binary condition change units, two kinds of different states are presented when the charging current of charging load is more than or less than the current threshold of setting in each binary condition change unit；When the charging current of charging load is more than or equal to the current threshold of the setting, the combinations of states that described two binary condition change units are presented is used for the full state for indicating charging load；When the charging current of charging load is less than the current threshold of the setting, combinations of states that described two binary condition change units are presented be used to indicating charging load in the state of filling.A kind of charging circuit and a kind of electronic equipment using above-mentioned charging indication is also disclosed.Above-mentioned charging indication, charging circuit and electronic equipment can indicate battery in the state of filling and full state, it is easy to use.
Description
Technical field
The present invention relates to charging technique, more particularly to a kind of charging indication, a kind of charging circuit and a kind of electricity
Sub- equipment.
Background technology
Charger is widely used in every field, and it is common to be particularly widely used in mobile phone, camera etc. in sphere of life
Electrical equipment.Charger is to use power electronics semiconductor device, is direct current by voltage and the changeless convert alternating current of frequency
A kind of static ac dc converter device.Using battery as working power or the electricity consumption occasion of stand-by power supply, charger has extensive
Application prospect.
Charger can be divided into many kinds according to charging object, such as lead acid batteries charger, electricity charger for Ni-Cd battery, nickel
Hydrogen battery charger and charger for lithium ion battery etc..Common charger, vehicle-mounted charge can be divided into according to use occasion again
Device etc..
Charger be essentially all by a stabilized power source plus necessary constant current, pressure limiting, in limited time etc. control circuit form.
When designing charger, it is necessary to consider the many-sides such as counnter attack refluence, anti-reverse, anti-short-circuit, anti-overvoltage and anti-overflow.
Due to many designs in terms of charging security, therefore some chargers to battery when charging at present, not
There is the mechanism whether instruction battery is full of, due to typically being overcharged without worry, battery will fill after the time enough that charges
It is full.But whether can only be full of by charging interval general estimation battery using this charger, therefore use is more inconvenient.
Some chargers provide fully charged instruction, but are completed only with an indicator lamp, such as lamp goes out during charging, fills
Lamp is bright when full, or conversely.If it is indicated that lamp damages, then the instruction of mistake can be obtained.
The content of the invention
Based on this, it is necessary to provide a kind of charging indication that can indicate charged state.
In addition, also provide a kind of charging circuit.
Finally, a kind of electronic equipment is also provided.
A kind of charging indication, for being connected between charge power supply and charging load, including the first binary condition becomes
Change unit and the second binary condition change unit；The first binary condition change unit is more than in the charging current of charging load
Or equal to the setting current threshold when be in first state, charging load charging current be less than the setting electric current
The second state is in during threshold value；The second binary condition change unit is more than or equal to described in the charging current of charging load
The third state is in during the current threshold of setting, is in when the charging current of charging load is less than the current threshold of the setting
4th state；When the charging current of charging load is more than or equal to the current threshold of the setting, first binary condition
The combinations of states that change unit and the second binary condition change unit are presented is used for the full state for indicating charging load；Charging
When the charging current of load is less than the current threshold of the setting, the first binary condition change unit and the second binary condition
Change unit present combinations of states be used for indicate charging load in the state of filling.
In one of the embodiments, the first binary condition change unit and the second binary condition change unit are mutual
Serial or parallel connection.
In one of the embodiments, the first binary condition change unit and the second binary condition change unit are in parallel
Connected afterwards with first resistor and be connected to the charge power supply both ends of input.
In one of the embodiments, the first binary condition change unit includes the second resistance and the first finger of series connection
Show lamp, the first state of the first binary condition change unit corresponds to the extinguishing of first indicator lamp, and the second state is corresponding
First indicator lamp is lighted.
In one of the embodiments, the second binary condition change unit includes 3rd resistor, switching tube and second
Indicator lamp；The positive pole of the charge power supply and the input of switching tube connect, and pass through 3rd resistor and the control terminal of switching tube
Connection, the output end of switching tube then connect second indicator lamp；The third state pair of the second binary condition change unit
Lighting for second indicator lamp is answered, the 4th state corresponds to the extinguishing of second indicator lamp.
In one of the embodiments, first indicator lamp is green LED lamp, and second indicator lamp is red LED
Lamp, the switching tube are PNP triode.
In one of the embodiments, in addition to be connected to input charge power supply both ends the first electric capacity.
In one of the embodiments, in addition to the Schottky diode that is connected on charge power supply positive pole circuit.
A kind of charging circuit, including：Voltage transformation module, charging can be loaded directly into for external power source to be converted to
Charge power supply in load；And above-mentioned charging indication；The charging indication is connected to the voltage conversion mould
Between block and charging load.
A kind of electronic equipment, including：Charging inlet, the external charger of charge power supply is provided for connecting；Battery case, use
In accommodating battery, there is the both positive and negative polarity contact touched with battery；And above-mentioned charging indication, it is connected to the charging
Between mouth and the both positive and negative polarity contact of the battery case.
Above-mentioned charging indication, charging circuit and electronic equipment, can by the first binary condition change unit and
The combinations of states of second binary condition change unit indicate respectively charging load in the state of filling and full state, it is 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 the charging indication of 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 the charging circuit of embodiment illustrated in fig. 3.
Embodiment
As shown in figure 1, the charging indication module map for an embodiment.The charging indication 10 is used to be connected to fill
Between power supply and charging load 20.Charging indication 10 includes two binary condition change units, is the first binary respectively
The binary condition change unit 104 of state change unit 102 and second.Each binary condition change unit 102,104 is negative in charging
Two kinds of different states are presented when being more than or less than the current threshold of setting in the charging current of load 20 respectively.
Specifically, it is that the first binary condition change unit 102 is more than or equal to described set in the charging current of charging load
First state is in during fixed current threshold, when the charging current of charging load is less than the current threshold of the setting in the
Two-state.
Second binary condition change unit 104 is more than or equal to the current threshold of the setting in the charging current of charging load
The third state is in during value, the 4th state is in when the charging current of charging load is less than the current threshold of the setting.
Therefore, when the charging current of charging load 20 is more than or equal to default current threshold, the first binary condition becomes
Unit 102 is in first state, the second binary condition change unit 104 is in the third state for change, and two binary conditions changes are single
Member 102,104 is in a kind of determined combination state, and this assembled state fills with for indicating battery electric quantity.Similarly,
When the charging current of charging load 20 is less than default current threshold, the first binary condition change unit 102 is in the second shape
State, the second binary condition change unit 104 are in the 4th state, and two binary condition change units 102,104 are in another kind
Determined combination state, this assembled state are used for indicating battery electric quantity also underfill.
That is, when the charging current of charging load 20 is more than or equal to the current threshold of the setting, described two two
The combinations of states that first state change unit 102,104 is presented is used for the full state for indicating charging load 20；In charging load 20
Charging current be less than the current threshold of the setting, the state group that described two binary condition change units 102,104 are presented
Share in instruction charging load 20 in the state of filling.
This way it is possible to avoid the problem of single indicator lamp damages to obtain miscue.
First binary condition change unit 102 and the second binary condition change unit 104 can phases in specific circuit
Mutual serial or parallel connection.When being serially connected, the two flows through identical electric current, therefore the first binary condition change unit 102 and second
Binary condition change unit 104 can use same circuits structure, but take different component parameters, so as to make to identical electric current
Go out different responses.
Specifically in the present embodiment, as shown in Fig. 2 the charging indication 10 includes the first binary condition parallel with one another
The binary condition change unit 104 of change unit 102 and second.And the first binary condition change unit 102 and the second binary shape
Connected after the parallel connection of state change unit 104 with first resistor R1 and be connected to the charge power supply both ends of input.
First binary condition change unit 102 includes the second resistance R2 and the first indicator lamp D1 of series connection.Second resistance R2
Resistance compared to the first indicator lamp D1 is larger, can get larger voltage.By adjusting the instructions of second resistance R2 and first
Lamp D1 resistance ratio, the change that the first indicator lamp D1 lights or extinguish can be caused in charging current Near Threshold, one
As be when charging current exceedes threshold value, the first indicator lamp D1 extinguishes, and when less than threshold value, the first indicator lamp D1 is lighted.This
In embodiment, the first indicator lamp D1 is green LED lamp.
Second binary condition change unit 104 includes 3rd resistor R3, switching tube Q1 and the second indicator lamp D2.Charge power supply
Positive pole be connected with switching tube Q1 input, and be connected by 3rd resistor R3 with switching tube Q1 control terminal, switching tube Q1
Output end then connect the second indicator lamp D2.Resistance R3 and one end that switching tube Q1 is connected are as being output to charging load just
Pole.In the present embodiment, the second indicator lamp D2 is red LED lamp.Switching tube Q1 is then PNP triode, and its emitter stage is as input
End, base stage are as control terminal, colelctor electrode as output end.
It is appreciated that in other embodiments, the first indicator lamp D1 and the second indicator lamp D2 can exchange color, or adopt
With other colour codes.Switching tube Q1 can then use other to realize the device of switch control functions.
Further, in the charging indication 10 of the present embodiment, in addition to the charge power supply both ends of input are connected to
The first electric capacity C1.First electric capacity C1 is used to filter.
Further, in the charging indication 10 of the present embodiment, in addition to it is connected on charge power supply positive pole circuit
Schottky diode.In embodiment illustrated in fig. 1, including 2 Schottky diodes in parallel in the same direction.Two Schottky diodes
The electric current that can be born can be increased.
Illustrate the operation principle of foregoing circuit below.
When charge power supply is charged to load, when load current is more than charging current threshold value, the first indicator lamp D1 by
Go out and turn bright, the second indicator lamp D2 is gone out by bright turn.When load current is less than charging current threshold value, the first indicator lamp D1 is gone out by bright turn,
Second indicator lamp D2 turns bright by going out.
It is specific as follows：When load current is more than charging current threshold value, because triode Q1 has sufficiently large base current,
Triode Q1 is turned on, and the second indicator lamp D2 is bright.Second resistance R2 resistance is larger with respect to the first indicator lamp D1 resistance simultaneously, from
And the voltage got is also big, the voltage got on the first indicator lamp D1 is insufficient to allow the first indicator lamp D1 to light from diminishing.
When load current is less than charging current threshold value, due to triode Q1 base current very littles, less than triode Q1's
Conducting electric current, triode Q1 cut-offs, the second indicator lamp D2 extinguish.Meanwhile although second resistance R2 resistance is big, due to negative
The electric current of load diminishes, and the voltage got on second resistance R2 also diminishes accordingly, and the first indicator lamp D1 voltages, which exceed, lights institute
Voltage is needed to be lit.
As shown in figure 3, the charging circuit module figure for an embodiment.The charging circuit includes voltage transformation module 30 and upper
The charging indication 10 of embodiment offer is provided.Wherein voltage transformation module 30 is used to be converted to external power source and can directly add
The charge power supply being downloaded in charging load 20.Charging indication 20 is then connected to the voltage transformation module 30 and charging load 20
Between.
As shown in figure 4, voltage transformation module 30 includes rectification and filter unit 310 and voltage-adjusting unit 320.Rectification and
Filter unit 310 is input to voltage-adjusting unit 320 after carrying out rectification and filtering to the alternating current of input.Voltage-adjusting unit
320 will carry out decompression processing through the voltage of over commutation and filtering is adjusted to charging voltage and exports to charging load 20.
Rectification and filter unit 310 include rectifier bridge and electrochemical capacitor, and the input of the rectifier bridge, which is used to connect, to be exchanged
Power supply, full-wave rectification is carried out to alternating current.The output end that the electrochemical capacitor is connected to the rectifier bridge is filtered processing.
Voltage-adjusting unit 320 includes switching power source chip, transformer and required peripheral components.Specific required device
It is shown in Figure 4 with connected mode.The power end of switching power source chip is connected to what rectification and filter unit 310 exported by resistance
Positive polarity, Pulse Width Control end is connected to rectification by the parallel circuit of resistance, diode and resistance and electric capacity and filtering is single
The positive polarity of the output of member 310, Pulse Width Control end connects transformer inputs negative pole simultaneously.Transformer inputs positive pole and rectification
The positive polarity exported with filter unit 310 connects.Wherein switching power source chip is input to change by pulse width modulation adjustment
The voltage of depressor makes it keep stable, and high voltage is carried out decompression processing output by transformer.
Voltage transformation module 30 also includes the feedback unit 330 for being connected to output end.The feedback signal hair of feedback unit 330
Give the 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 includes being used for the charging for connecting the external charger for providing charge power supply
Interface and the battery case for accommodating battery.Battery case has the both positive and negative polarity contact touched with battery.
The charging indication that above-described embodiment is provided can be connected to the charging inlet and the battery case just
Between cathode contact, so as to the part as electronic equipment, charging instruction is provided for the battery of electronic equipment.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (5)
1. a kind of charging indication, for being connected between charge power supply and charging load, including the change of the first binary condition
Unit and the second binary condition change unit；The first binary condition change unit and the second binary condition change unit are in parallel
Connected afterwards with first resistor and be connected to the charge power supply both ends of input；
The first binary condition change unit includes the second resistance and the first indicator lamp of series connection；Second binary condition becomes
Changing unit includes 3rd resistor, switching tube and the second indicator lamp；The positive pole of the charge power supply and the input of switching tube connect,
And connected by 3rd resistor and the control terminal of switching tube, the output end of switching tube then connects second indicator lamp；
When the charging current of charging load is more than or equal to the current threshold of setting, the first indicator lamp extinguishes, the second indicator lamp
Light, for indicating the full state of charging load；
When the charging current of charging load is less than the current threshold of setting, the first indicator lamp is lighted, and the second indicator lamp extinguishes, and is used
In instruction charging load in the state of filling；
The charging indication also includes 2 poles of Schottky two in parallel in the same direction being connected on charge power supply positive pole circuit
Pipe.
2. charging indication according to claim 1, it is characterised in that first indicator lamp is green LED lamp, institute
It is red LED lamp to state the second indicator lamp, and the switching tube is PNP triode.
3. charging indication according to claim 1, it is characterised in that also include the charge power supply two for being connected to input
First electric capacity at end.
A kind of 4. charging circuit, it is characterised in that including：
Voltage transformation module, for external power source to be converted into the charge power supply that can be loaded directly into charging load；And
Charging indication as described in any one of claims 1 to 3；
The charging indication is connected between the voltage transformation module and charging load.
5. a kind of electronic equipment, including：
Charging inlet, the external charger of charge power supply is provided for connecting；
Battery case, for accommodating battery, there is the both positive and negative polarity contact touched with battery；And
Charging indication as described in any one of claims 1 to 3, it is being connected to the charging inlet and the battery case just
Between cathode contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310097457.4A CN104079012B (en) | 2013-03-25 | 2013-03-25 | Charging indication, charging circuit and electronic equipment |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN104079012A CN104079012A (en) | 2014-10-01 |
| CN104079012B true CN104079012B (en) | 2017-12-01 |
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| CN201310097457.4A Active CN104079012B (en) | 2013-03-25 | 2013-03-25 | Charging indication, charging circuit and electronic equipment |
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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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| CN102231548A (en) * | 2011-07-04 | 2011-11-02 | 上海工程技术大学 | Battery charging device with dynamic capacity-display and charge countdown functions and application thereof |
| CN202167888U (en) * | 2011-07-21 | 2012-03-14 | 徐州市恒源电器有限公司 | Lithium battery charger |
| CN202206149U (en) * | 2010-04-07 | 2012-04-25 | 布莱克和戴克公司 | Battery charger and unit monitoring circuit |
| CN102914744A (en) * | 2012-06-29 | 2013-02-06 | 惠州Tcl移动通信有限公司 | Mobile terminal, battery power display system of mobile terminal, and method for acquiring battery power |
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2013
- 2013-03-25 CN CN201310097457.4A patent/CN104079012B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101488592A (en) * | 2008-01-18 | 2009-07-22 | 深圳市沃特玛电池有限公司 | Charging apparatus for secondary cell |
| JP2010019758A (en) * | 2008-07-11 | 2010-01-28 | Mitsumi Electric Co Ltd | Battery state detection device |
| CN202206149U (en) * | 2010-04-07 | 2012-04-25 | 布莱克和戴克公司 | Battery charger and unit monitoring circuit |
| CN102231548A (en) * | 2011-07-04 | 2011-11-02 | 上海工程技术大学 | Battery charging device with dynamic capacity-display and charge countdown functions and application thereof |
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| CN104079012A (en) | 2014-10-01 |
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