CN207782447U - A kind of battery charging management circuit and bluetooth headset - Google Patents

A kind of battery charging management circuit and bluetooth headset Download PDF

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Publication number
CN207782447U
CN207782447U CN201820049163.2U CN201820049163U CN207782447U CN 207782447 U CN207782447 U CN 207782447U CN 201820049163 U CN201820049163 U CN 201820049163U CN 207782447 U CN207782447 U CN 207782447U
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Prior art keywords
battery
charging management
current
diode
hold
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CN201820049163.2U
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Chinese (zh)
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高荣凯
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Goertek Techology Co Ltd
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Goertek Techology Co Ltd
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Abstract

The utility model discloses a kind of battery charging management circuit and bluetooth headsets, including charging management chip, battery, hold-off diode, current-limiting resistance, switch module, bleeder resistor;Wherein charging management chip includes voltage input and voltage output;Battery includes anode and cathode;The anode connection voltage output of hold-off diode, cathode connect the anode of battery;Current-limiting resistance includes first end and second end, and first end connects hold-off diode cathode;One end of the switch ways of switch module and the second end of current-limiting resistance connect, other end ground connection;Bleeder resistor includes first end and second end, and first end connects the anode of hold-off diode, second end ground connection.A kind of bluetooth headset, including above-mentioned battery charging management circuit.The battery charging management circuit and bluetooth headset of the utility model make battery reach full charge, increase the cruise duration of battery, extend the service life of battery and bluetooth headset.

Description

A kind of battery charging management circuit and bluetooth headset
Technical field
The utility model is related to battery charging management technical fields, specifically, being to be related to a kind of battery charging management electricity Road and bluetooth headset.
Background technology
Currently, the cut-off charging current of some charging management chips setting is a percentage of quickly charging battery electric current The percentage number for accounting for quickly charging battery electric current that battery itself requires is not achieved for example, for the 10% of fast charging current in number Such as 2% requirement, so it is insufficient to there is a problem of that rechargeable battery charges, to influence cruise duration and the battery longevity of battery Life.In order to increase the cruise duration of battery and extend the service life of battery, need battery charge being reduced to battery sheet The value of the percentage numerical example such as 2% for the fast charging current that body requires.So by designing a kind of circuit, reaching can not change In the case of charging management chip, it is reduced to the charge cutoff electric current right and wrong that charging current to the battery of battery charging itself requires Often it is necessary to.
Invention content
The charging electricity for reducing rechargeable battery may be implemented in a kind of charge management circuit of the utility model offer and bluetooth headset It flow to and ends charging current as defined in battery itself, achieve the effect that battery full charge, increase battery life, extend battery And the service life of bluetooth headset.
In order to solve the above technical problems, the utility model is achieved using following technical scheme:
A kind of battery charging management circuit, including charging management chip, battery, hold-off diode, current-limiting resistance, switching molding Block, bleeder resistor;Wherein, the charging management chip includes voltage input and voltage output;The battery is to be charged Battery comprising anode and cathode;The anode of the hold-off diode connects the voltage output, and cathode connects the battery The anode;The current-limiting resistance includes first end and second end, and the first end connects the cathode of the hold-off diode; One end of the switch ways of the switch module is connect with the second end of the current-limiting resistance, other end ground connection;It is described to let out Leakage resistance includes first end and second end, and the first end connects the anode of the hold-off diode, the second end ground connection.
As a kind of specific circuit design of battery charging management circuit, the switch module is N-channel MOS pipe, Grid connects the anode of the hold-off diode, and drain electrode connects the second end of the current-limiting resistance, source electrode ground connection.
As a kind of specific circuit design of another kind of battery charging management circuit, the switch module is NPN type three Pole pipe, collector connect the second end of the current-limiting resistance, and emitter ground connection, the battery charging management circuit is also Including divider resistance, it is connected on the positive between the first end of the bleeder resistor of the hold-off diode, it is described The base stage of triode connects the common end of the divider resistance and the bleeder resistor.
As a kind of specific circuit design of another kind of battery charging management circuit, the switch module is built-in resistor NPN type triode, collector connects the second end of the current-limiting resistance, emitter ground connection, base stage with it is described The anode connection of hold-off diode.
Preferably, the charging management chip is Bluetooth chip.
A kind of bluetooth headset includes above-mentioned battery charging management circuit.
Compared with prior art, the advantages of a kind of battery charging management circuit and bluetooth headset of the utility model and actively Effect is:The battery charging management circuit of the utility model makes the charging current of battery reach the nominal charge cutoff electric current of battery Value, make battery charging it is more abundant, it is fully charged to achieve the effect that, increase the cruise duration of battery, extend the use of battery Service life;Including the battery of the bluetooth headset of this battery charging management circuit can similarly carry out full charge, increase bluetooth headset Extend the service life of bluetooth headset in cruise duration.
Description of the drawings
Fig. 1 is the circuit diagram of the embodiment one for the battery charging management circuit that the utility model is proposed;
Fig. 2 is the circuit diagram of the embodiment two for the battery charging management circuit that the utility model is proposed;
Fig. 3 is the circuit diagram of the embodiment three for the battery charging management circuit that the utility model is proposed.
In figure,
1, charging management chip;2, battery;101, voltage input;102, voltage output;301, first end;302, Two ends;401, first end;402, second end;D1, hold-off diode;Q1, metal-oxide-semiconductor;Q2, triode;Q3, triode;R1, current limliting Resistance;R2, bleeder resistor;R3, divider resistance.
Specific implementation mode
The specific implementation mode of the battery charging management circuit of the utility model is made below in conjunction with the accompanying drawings further detailed Ground explanation.
Referring to Fig.1, a kind of battery charging management circuit of the utility model, including charging management chip 1, battery 2, cut-off Diode D1, current-limiting resistance R1, switch module, bleeder resistor R2;Wherein, charging management chip 1 includes 101 He of voltage input Voltage output 102, voltage input 1 is used for output supply voltage for connecting supply voltage, voltage output 102, to electricity Pond charging provides electric energy, and the output of supply voltage is terminated when the detection of charging management chip 1 reaches cut-off charging current;Electricity Pond 2 is battery to be charged comprising anode and cathode;The anode connection voltage output 102 of hold-off diode D1, cathode connection The anode of battery 2;Current-limiting resistance R1 includes first end 301 and second end 302, and first end 301 connects the negative of hold-off diode D1 Pole;One end of the switch ways of switch module is connect with the second end 302 of current-limiting resistance R1, other end ground connection;Bleeder resistor R2 Including first end 401 and second end 402, first end 401 connects the anode of hold-off diode D1, and second end 402 is grounded.Charging When, 102 output supply voltage of voltage output of charging management chip 1, and charging management chip 1 monitors the big of charging current It is small;The switch ways of switch module are connected state at this time, and the electric current that charging management chip 1 monitors includes to the charging of battery 2 Electric current with by the electric current of current-limiting resistance R1 and the switch ways of switch module and;With the progress of charging, charging current From large to small;When reaching the cut-off charging current of charging management chip 1, that is, the charging current of battery 2 and pass through current limliting The Charge Management when electric current of the switch ways of resistance R1 and switch module and equal to charging management chip 1 cut-off charging current Chip 1 cuts off voltage and current output, stops charging to battery 2;At this point, the charging current of battery 2 is exactly as defined in battery 2 Minimum cut-off charging current, realizes that battery 2 is fully charged.
After battery 2 is fully charged, charging management chip 1 controls voltage output 102 and stops power supply, due to hold-off diode D1 is one-way conduction element, hold-off diode D1 cut-offs;The switch ways of switch module disconnect;Battery 2 passes through hold-off diode The leakage current of D1 flows into ground by bleeder resistor R2, it is ensured that the switch ways of switch module disconnect, and battery 2 completes charging.
Below by two specific embodiments, to a kind of physical circuit of battery charging management circuit of the utility model Design and operation principle are described in detail.
Embodiment one, referring to Fig.1, switch module are N-channel MOS pipe Q1, and grid G is connecting hold-off diode D1 just Pole, drain D connect the second end 302 of current-limiting resistance R1, source S ground connection.In charging process, the voltage of voltage output 102 Make drain D and the source S conducting of N-channel MOS pipe Q1;The drain D and source that electric current passes through current-limiting resistance R1 and N-channel MOS pipe Q1 Pole S reaches ground, forms shunt current I1;Make the charging for being equal to shunt current I1 and battery 2 by the electric current of charging management chip 1 The sum of electric current I2;And with the progress that battery 2 charges, 2 charging current of battery constantly reduces, until filling for charging management chip 1 Electric current reaches its defined charge cutoff electric current, and the charging current I2 of battery 2 is charge cutoff electric current as defined in battery at this time, Battery 2 is set to reach full charge.When charging management chip 1 detects that electric current reaches cut-off charging current, voltage output is controlled Mouth 102 stops power supply;Then turned off between the drain D and source S of N-channel MOS pipe Q1;The leakage that battery 2 passes through hold-off diode D1 Electric current flows into ground by bleeder resistor R2;Battery 2 completes full charge.Increase the cruise duration of battery 2, extends the service life of battery 2.
Preferably, charging management chip 1 is Bluetooth chip, and Bluetooth chip is built-in with the circuit for Charge Management.
A kind of bluetooth headset includes above-mentioned battery charging management circuit, and the battery 2 in bluetooth headset is made to reach full charge, Increase the cruise duration of battery 2, extends the service life of battery 2 and bluetooth headset.
Embodiment two, with reference to Fig. 2, the switch module in battery charging management circuit is the triode Q2 of NPN type, base stage The first end 401 of B connection bleeder resistors R2, the second end 302 of collector C connection current-limiting resistances R1, emitter E ground connection;Battery Charging circuit further includes divider resistance R3, is series at the public of the base stage of triode Q2 and the first end 401 of bleeder resistor R2 Between end and the anode of hold-off diode D1.In charging process, the voltage of voltage output 102 by divider resistance R3 with let out Partial pressures of the leakage resistance R2 between base stage B and emitter E makes the collector C of NPN type triode Q2 and emitter E be connected;Electric current Ground is reached by the collector C and emitter E of current-limiting resistance R1 and NPN type triode Q2, forms shunt current I1;Make by filling The electric current of electric managing chip 1 be equal to shunt current I1 and battery 2 charging current I2's and;And with battery 2 charge progress, 2 charging current of battery constantly reduces, until the charging current of charging management chip 1 reaches its defined charge cutoff electric current, this When battery 2 charging current I2 be battery as defined in charge cutoff electric current, so that battery 2 is reached full charge.When charging management chip 1 When detecting that electric current reaches cut-off charging current, control voltage output 102 stops power supply;The then triode Q2 of NPN type It is turned off between collector C and emitter E;Battery 2 flows into ground by the leakage current of hold-off diode D1 by bleeder resistor R2;Electricity Complete full charge in pond 2.
Preferably, charging management chip 1 is Bluetooth chip, and Bluetooth chip is built-in with the circuit for Charge Management.
A kind of bluetooth headset includes above-mentioned battery charging management circuit, and the battery 2 in bluetooth headset is made to reach full charge, Increase the cruise duration of battery 2, extends the service life of battery 2 and bluetooth headset.
Embodiment three, with reference to Fig. 3, the switch module in battery charging management circuit is the three of the NPN type of in-built electrical resistance type Pole pipe Q3, the anode of base stage B connection hold-off diodes D1, the second end 302 of collector C connection current-limiting resistances R1, hair Emitter-base bandgap grading E ground connection.In charging process, the voltage of voltage output 102 makes the collector C of NPN type triode Q3 and emitter E lead It is logical;Electric current reaches ground by the collector C and emitter E of current-limiting resistance R1 and NPN type triode Q3, forms shunt current I1; Make by the electric current of charging management chip 1 be equal to shunt current I1 and battery 2 charging current I2's and;And as battery 2 fills The progress of electricity, 2 charging current of battery constantly reduce, and are cut until the charging current of charging management chip 1 reaches its defined charging Only electric current, the charging current I2 of battery 2 is charge cutoff electric current as defined in battery at this time, and battery 2 is made to reach full charge.Work as charging When managing chip 1 detects that electric current reaches cut-off charging current, control voltage output 102 stops power supply;Then the three of NPN type It is turned off between the collector C and emitter E of pole pipe Q3;Battery 2 passes through bleeder resistor R2 by the leakage current of hold-off diode D1 Flow into ground;Battery 2 completes full charge.
Preferably, charging management chip 1 is Bluetooth chip, and Bluetooth chip is built-in with the circuit for Charge Management.
A kind of bluetooth headset includes above-mentioned battery charging management circuit, and the battery 2 in bluetooth headset is made to reach full charge, Increase the cruise duration of battery 2, extends the service life of battery 2 and bluetooth headset.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above, The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model, It should also belong to the protection scope of the utility model.

Claims (6)

1. a kind of battery charging management circuit, including:
Charging management chip comprising voltage input and voltage output;
Battery comprising anode and cathode, which is characterized in that including:
Hold-off diode, anode connect the voltage output, and cathode connects the anode of the battery;
Current-limiting resistance comprising first end and second end, the first end connect the cathode of the hold-off diode;
Switch module, one end of switch ways are connect with the second end of the current-limiting resistance, other end ground connection;
Bleeder resistor comprising first end and second end, the first end connect the anode of the hold-off diode, and described second End ground connection.
2. battery charging management circuit according to claim 1, which is characterized in that the switch module is N-channel MOS Pipe, grid connect the anode of the hold-off diode, and drain electrode connects the second end of the current-limiting resistance, source electrode ground connection.
3. battery charging management circuit according to claim 1, which is characterized in that the switch module is three pole of NPN type Pipe, collector connect the second end of the current-limiting resistance, emitter ground connection, and the battery charging management circuit also wraps Divider resistance is included, is connected on the positive between the first end of the bleeder resistor of the hold-off diode, described three The base stage of pole pipe connects the common end of the divider resistance and the bleeder resistor.
4. battery charging management circuit according to claim 1, which is characterized in that the switch module is built-in resistor NPN type triode, collector connect the second end of the current-limiting resistance, emitter ground connection, base stage with described section The only anode connection of diode.
5. battery charging management circuit according to claim 1, which is characterized in that the charging management chip is bluetooth core Piece.
6. a kind of bluetooth headset, which is characterized in that include claim 1-5 any one of them battery charging management circuits.
CN201820049163.2U 2018-01-12 2018-01-12 A kind of battery charging management circuit and bluetooth headset Active CN207782447U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820049163.2U CN207782447U (en) 2018-01-12 2018-01-12 A kind of battery charging management circuit and bluetooth headset

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820049163.2U CN207782447U (en) 2018-01-12 2018-01-12 A kind of battery charging management circuit and bluetooth headset

Publications (1)

Publication Number Publication Date
CN207782447U true CN207782447U (en) 2018-08-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112039152A (en) * 2020-08-27 2020-12-04 西安稳先半导体科技有限责任公司 Bluetooth earphone
CN114865754A (en) * 2022-07-06 2022-08-05 荣耀终端有限公司 Charging circuit, charging chip and electronic equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112039152A (en) * 2020-08-27 2020-12-04 西安稳先半导体科技有限责任公司 Bluetooth earphone
CN112039152B (en) * 2020-08-27 2022-10-21 西安稳先半导体科技有限责任公司 Bluetooth earphone
CN114865754A (en) * 2022-07-06 2022-08-05 荣耀终端有限公司 Charging circuit, charging chip and electronic equipment

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