CN1885669A - Rechargeable battery charging method and its device - Google Patents
Rechargeable battery charging method and its device Download PDFInfo
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- CN1885669A CN1885669A CNA2005100119825A CN200510011982A CN1885669A CN 1885669 A CN1885669 A CN 1885669A CN A2005100119825 A CNA2005100119825 A CN A2005100119825A CN 200510011982 A CN200510011982 A CN 200510011982A CN 1885669 A CN1885669 A CN 1885669A
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Abstract
The related charge device for charged cell comprises: a normal charge circuit, a voltage detection circuit for the cell, a limit-current boost up circuit to charge the cell by limited current some les than normal value, a control circuit to select the limit-current charge when call voltage less than the first set value or normal charge. This invention can prolong cell lifetime.
Description
Technical field
The present invention relates to a kind of charging method and device thereof of rechargeable battery, particularly relate to a kind of charging method and device thereof of effectively extending battery life.
Background technology
Charge management circuit is a necessary part in the terminal equipments such as mobile phone, PDA.Good charging method can effectively prolong the useful life of rechargeable battery, improves the reliability of equipment.Otherwise can significantly reduce the useful life of rechargeable battery.Aspect the Charge Management of terminal equipment, generally use following three kinds of modes at present.Use carries the charger of Charge Management, uses expensive power management chip, uses the charger with constant pressure and flow output directly to charge.
Wherein, the high use of charger cost that carries Charge Management is dumb, often needs to take out back charging separately in the battery slave unit.Some power management chip provides complete Charge Management function, but can not well used in a lot of low side devices owing to cost is higher equally.Using a kind of comparatively widely charging modes in a lot of low side devices is directly to use the charger with constant pressure and flow function directly to charge.This mode cost is lower, can finish two basic processes of desired constant voltage of general charging process and constant current charge.But only use constant voltage constant current charging that the life-span of rechargeable battery is had a significant impact.Particularly directly use constant pressure and flow that the performance of battery is had a significant impact to the lower battery of the voltage after the over-discharge can.Concerning some chip, can't operate as normal after cell voltage is lower than certain value, whole charging process can't be carried out, thereby cause battery to be scrapped.
At above the deficiencies in the prior art, a kind of convenient adjusting, production in enormous quantities, the well behaved effectively charging method of extending battery life of being suitable for simple in structure have been proposed.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of charging method and device thereof of rechargeable battery, utilizes this charging method and charging device can effectively prolong the life-span of rechargeable battery.
To achieve these goals, the invention provides a kind of charging device of rechargeable battery, wherein, comprising:
One normal charging circuit is used for described rechargeable battery is charged normal;
One voltage detecting circuit is used to detect the voltage of described rechargeable battery;
One current limliting booster circuit is used for described battery is carried out current-limiting charge, and the charging current of described current-limiting charge is less than the described charging current that charges normal;
One control circuit is used for controlling described rechargeable battery for charging normal or current-limiting charge according to detected cell voltage; When described cell voltage is lower than first setting voltage, select described current limliting booster circuit that battery is carried out current-limiting charge; When described cell voltage during, select described normal charging circuit that battery is charged normal more than or equal to described first setting voltage.
The charging device of described rechargeable battery, wherein, described control circuit further comprises one first oxide-semiconductor control transistors and one second oxide-semiconductor control transistors; Described first oxide-semiconductor control transistors links to each other with described second oxide-semiconductor control transistors; Described second oxide-semiconductor control transistors is arranged between described normal charging circuit and the described rechargeable battery, and links to each other with described current limliting booster circuit; Described control signal is imported from described first oxide-semiconductor control transistors, by conducting or the shutoff of controlling described second oxide-semiconductor control transistors, further controls described rechargeable battery and selects described normal charging circuit charging or the charging of described current limliting booster circuit.
The charging device of described rechargeable battery, wherein, described first oxide-semiconductor control transistors is a triode, described second oxide-semiconductor control transistors is a PMOS pipe; The collector electrode of described first oxide-semiconductor control transistors links to each other with the grid of described second oxide-semiconductor control transistors; The collector electrode of described first oxide-semiconductor control transistors links to each other with described normal charging circuit by one first pull-up resistor; The collector electrode of described first oxide-semiconductor control transistors links to each other with ground by one first divider resistance; The grounded emitter of described first oxide-semiconductor control transistors.
The charging device of described rechargeable battery, wherein, the source electrode of described second oxide-semiconductor control transistors links to each other with described normal charging circuit and described current limliting booster circuit respectively; The drain electrode of described second oxide-semiconductor control transistors is connected with described rechargeable battery.
The charging device of described rechargeable battery, wherein, described current limliting booster circuit further comprises a diode and a current-limiting resistance; Described diode is connected with described current-limiting resistance; The positive pole of described diode links to each other with the source electrode and the described normal charging circuit of second oxide-semiconductor control transistors of described control circuit; Described current-limiting resistance links to each other with described rechargeable battery.
The charging device of described rechargeable battery, wherein, described voltage detecting circuit further comprises one the 3rd oxide-semiconductor control transistors and the 4th oxide-semiconductor control transistors, wherein, described the 3rd oxide-semiconductor control transistors links to each other with described the 4th oxide-semiconductor control transistors; Detect control signal and import from described the 3rd oxide-semiconductor control transistors, conducting by controlling described the 4th oxide-semiconductor control transistors or shutoff are controlled the unlatching of described voltage detecting circuit or are closed.
The charging device of described rechargeable battery, wherein, described the 3rd oxide-semiconductor control transistors is a triode; Described the 4th oxide-semiconductor control transistors is a PMOS pipe; The collector electrode of described the 3rd oxide-semiconductor control transistors links to each other with the grid of described the 4th oxide-semiconductor control transistors; The collector electrode of described the 3rd oxide-semiconductor control transistors links to each other with the output of described rechargeable battery by a pull-up resistor; The source electrode of described the 4th oxide-semiconductor control transistors links to each other with the output of described rechargeable battery; The drain electrode of described the 4th oxide-semiconductor control transistors links to each other with ground; Between the drain electrode of described the 4th oxide-semiconductor control transistors and ground, be in series with divider resistance.
The charging device of described rechargeable battery, wherein, the divider resistance of connecting between the drain electrode of described the 4th oxide-semiconductor control transistors and ground comprises one second divider resistance and the two or three divider resistance; The output signal node of voltage detecting circuit is between described second divider resistance and the 3rd divider resistance.
The present invention also provides a kind of charging method, wherein, comprising:
The step that a pair of rechargeable battery charges normal;
One detects the step of cell voltage;
The step of a pair of rechargeable battery current-limiting charge, the wherein charging current of the charging current that in this step, adopts when rechargeable battery is charged normal; And
One step according to the charge tunnel of detected cell voltage control rechargeable battery when described cell voltage is lower than first setting voltage, is selected battery is carried out current-limiting charge; When described cell voltage during, select battery is charged normal more than or equal to described first setting voltage.
Described charging method, wherein, the step of described control rechargeable battery charge tunnel is by the conducting of oxide-semiconductor control transistors or turn-offs and realize.
Charging method of the present invention and the effective charging method of extending battery life of device, and the convenient adjusting of charging device of the present invention, simple in structurely be suitable for production in enormous quantities, and functional.But use low power management chip of charging method of the present invention and the simple cost of device function of use and general charger to realize the Charge Management of function admirable, effectively improve battery life, reduce product cost.Charging method of the present invention and device can be used for the portable equipment that mobile phone, PDA etc. carry charging control circuit.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the charging circuit and the control circuit of the embodiment of the invention;
Fig. 2 is the battery voltage detection circuit of the embodiment of the invention.
Embodiment
Charging method of the present invention and device thereof can effectively prolong the life-span of rechargeable battery, low-voltage battery for over-discharge can use the trickle charge mode of little electric current progressively to improve cell voltage earlier, utilizes the constant current constant voltage characteristic of charger that battery is full of again after making the battery recovery normal voltage.Finish this purpose, need four partial circuits to cooperatively interact.That is: the current limliting booster circuit 1, normal charging circuit 2, control circuit 3, voltage detecting circuit 4.Use 1 pair of low-voltage battery of current limliting booster circuit to carry out low current charge, cell voltage is progressively improved, simultaneously, improve the voltage of battery access point, avoid cell voltage to cross low and can't normal boot-strap.After being elevated to certain value under the effect of cell voltage at little electric current, under the control of control circuit 3, charge tunnel being switched to normal charging circuit 2 by current limliting booster circuit 1 and carry out constant-current constant-voltage charging.Voltage detecting circuit 4 is finished the battery voltage detection of whole charging process, and the control foundation is provided.The normal charging circuit 2 of the embodiment of the invention refers to be rechargeable battery 5 chargings by charger 21 directly.
Fig. 1 shows the charging circuit and the control circuit of the embodiment of the invention.In Fig. 1, control circuit 3 comprises pull-up resistor 31, divider resistance 33, triode 32 (Q2) and PMOS pipe 34 (Q1); Current limliting booster circuit 1 comprises diode 11 and current-limiting resistance 12 (R1); Charger 21 links to each other with the collector electrode electricity of triode 32 by pull-up resistor 31, and divider resistance 33 is arranged between the collector electrode and ground of triode 32, the grounded emitter of triode 32.The source electrode (S) of PMOS pipe 34 links to each other with charger 21 electricity, and its drain electrode (D) links to each other with rechargeable battery 5.Diode 11 is connected with current-limiting resistance 12 (R1), is connected between the positive pole of charger 21 and rechargeable battery 5, and the positive pole of diode 11 links to each other with charger 21.The one GPIO (general input and output) control signal of the main control chip output of equipment is imported by the base stage of triode 32 (Q2) and is controlled conducting and the shutoff that PMOS manages 34 grid source electrodes (DS), when PMOS manages the DS conducting of 34 (Q1), the charge tunnel of rechargeable battery 5 selects to switch to charger 21 directly to rechargeable battery 5 chargings, promptly selects this moment normal charging circuit 2 to be rechargeable battery 5 chargings; When the DS of PMOS pipe 34 turn-offed, the charge tunnel that switches rechargeable battery 5 was a current limliting booster circuit 1.
When cell voltage is lower than certain set point (as 3.2V), think that then cell voltage is lower.If directly use constant current charge this moment, will produce bigger impact to low-voltage battery, seriously shorten battery life.In this case, as long as a GPIO control signal is changed to low level, turn-off between the grid source electrode (DS) with PMOS pipe 34 (Q1).Charging current will be by diode 11 (D1) and current-limiting resistance 12 (R1) current limliting booster circuit 1 charge to battery.Because this moment, charger 21 should be operated in areas of permanent pressure, was fixed voltage V
CHARGERIf cell voltage is V
BATT, the electric current by the current limliting booster circuit should be (V so
CHARGER-V
BATT-0.7)/and R1, suitably choose the value of each parameter, can make charging current be reduced to a smaller value (as 50mA) battery is charged, cell voltage will progressively increase, and avoid the impact of big electric current can effectively increase battery life.
When battery detection circuit 4 detects cell voltage and rises to the constant current charge that be fit to use big electric current (as cell voltage reach or greater than 3.2V), as long as a GPIO control signal is changed to high level, make conducting between the grid source electrode (DS) of PMOS pipe 34 (Q1), PMOS pipe 34 (Q1) that select for use can flow through bigger electric current (more than the 1A), this moment, the charger 21 constant current district of working carried out constant current charge (being generally the above big electric current of 500mA) to battery.Use constant current charge battery to be full of (as being charged to 4.2V), charger 21 enters pressure constant state and keeps a period of time, cell voltage is stablized finally finished whole charging process.When taking down charger 21, the grid (the G utmost point) of PMOS pipe 34 (Q1) becomes low level, and the DS conducting enters normal operating conditions.
When terminal equipment was only battery-powered, the G of Q1 is low level very, the DS conducting.Select grid source resistance R for use
DS(on) lower device can be ignored, and battery can be given power devices.
Fig. 2 is the voltage detecting circuit figure of the embodiment of the invention.When the cell voltage reduction needs charging, at first cell voltage is detected by battery voltage detection circuit.In Fig. 2, the grounded emitter of transistor 41 links to each other by a pull-up resistor 43 electricity between the output of its collector electrode and rechargeable battery 5, and the collector electrode of transistor 41 is connected with the grid (G) that PMOS manages 42 (Q4).Be provided with divider resistance 44 (R2) and divider resistance 45 (R3) between the drain electrode (D) of PMOS pipe 42 and the ground, R2 connects with R3.The detection output signal HKADC of battery voltage detection circuit 4 draws from the node A that is positioned at 45 of divider resistance 44 and divider resistances.Battery detecting the 2nd GPIO control signal is changed to high level with the 2nd GPIO control signal and makes 42 (Q4) conducting of PMOS pipe by the base stage input of triode 41 (Q3), and the D utmost point of Q4 and the voltage between the ground are exactly cell voltage.For the ease of the detection of HKADC, use divider resistance 44 (R2) and divider resistance 45 (R3) to carry out dividing potential drop, make the dividing potential drop result enter the range of HKADC.After finishing, battery voltage detection can battery detection circuit be closed, to save battery consumption by the 2nd GPIO control signal is changed to low level.
Charging method of the present invention and the effective extending battery life of device thereof provide the charging method and the device of a kind of convenient easy-adjustable, simple in structure, good, the wieldy effectively extending battery life of cost low performance.Can be widely used in mobile phone, PDA etc. and carry the portable equipment of charging control circuit.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1, a kind of charging device of rechargeable battery is characterized in that, comprising:
One normal charging circuit is used for described rechargeable battery is charged normal;
One voltage detecting circuit is used to detect the voltage of described rechargeable battery;
One current limliting booster circuit is used for described battery is carried out current-limiting charge, and the charging current of described current-limiting charge is less than the described charging current that charges normal;
One control circuit is used for controlling described rechargeable battery for charging normal or current-limiting charge according to detected cell voltage; When described cell voltage is lower than first setting voltage, select described current limliting booster circuit that battery is carried out current-limiting charge; When described cell voltage during, select described normal charging circuit that battery is charged normal more than or equal to described first setting voltage.
2, the charging device of rechargeable battery according to claim 1 is characterized in that, described control circuit further comprises one first oxide-semiconductor control transistors and one second oxide-semiconductor control transistors; Described first oxide-semiconductor control transistors links to each other with described second oxide-semiconductor control transistors; Described second oxide-semiconductor control transistors is arranged between described normal charging circuit and the described rechargeable battery, and links to each other with described current limliting booster circuit; Described control signal is imported from described first oxide-semiconductor control transistors, by conducting or the shutoff of controlling described second oxide-semiconductor control transistors, further controls described rechargeable battery and selects described normal charging circuit charging or the charging of described current limliting booster circuit.
3, the charging device of rechargeable battery according to claim 2 is characterized in that, described first oxide-semiconductor control transistors is a triode, and described second oxide-semiconductor control transistors is a PMOS pipe; The collector electrode of described first oxide-semiconductor control transistors links to each other with the grid of described second oxide-semiconductor control transistors; The collector electrode of described first oxide-semiconductor control transistors links to each other with described normal charging circuit by one first pull-up resistor; The collector electrode of described first oxide-semiconductor control transistors links to each other with ground by one first divider resistance; The grounded emitter of described first oxide-semiconductor control transistors.
4, the charging device of rechargeable battery according to claim 3 is characterized in that, the source electrode of described second oxide-semiconductor control transistors links to each other with described normal charging circuit and described current limliting booster circuit respectively; The drain electrode of described second oxide-semiconductor control transistors is connected with described rechargeable battery.
According to the charging device of claim 3 or 4 described rechargeable batteries, it is characterized in that 5, described current limliting booster circuit further comprises a diode and a current-limiting resistance; Described diode is connected with described current-limiting resistance; The positive pole of described diode links to each other with the source electrode and the described normal charging circuit of second oxide-semiconductor control transistors of described control circuit; Described current-limiting resistance links to each other with described rechargeable battery.
6, the charging device of rechargeable battery according to claim 5, it is characterized in that, described voltage detecting circuit further comprises one the 3rd oxide-semiconductor control transistors and the 4th oxide-semiconductor control transistors, and wherein, described the 3rd oxide-semiconductor control transistors links to each other with described the 4th oxide-semiconductor control transistors; Detect control signal and import from described the 3rd oxide-semiconductor control transistors, conducting by controlling described the 4th oxide-semiconductor control transistors or shutoff are controlled the unlatching of described voltage detecting circuit or are closed.
7, the charging device of rechargeable battery according to claim 6 is characterized in that, described the 3rd oxide-semiconductor control transistors is a triode; Described the 4th oxide-semiconductor control transistors is a PMOS pipe; The collector electrode of described the 3rd oxide-semiconductor control transistors links to each other with the grid of described the 4th oxide-semiconductor control transistors; The collector electrode of described the 3rd oxide-semiconductor control transistors links to each other with the output of described rechargeable battery by a pull-up resistor; The source electrode of described the 4th oxide-semiconductor control transistors links to each other with the output of described rechargeable battery; The drain electrode of described the 4th oxide-semiconductor control transistors links to each other with ground; Between the drain electrode of described the 4th oxide-semiconductor control transistors and ground, be in series with divider resistance.
8, the charging device of rechargeable battery according to claim 7 is characterized in that, the divider resistance of connecting between the drain electrode of described the 4th oxide-semiconductor control transistors and ground comprises one second divider resistance and the two or three divider resistance; The output signal node of voltage detecting circuit is between described second divider resistance and the 3rd divider resistance.
9, a kind of charging method that is applicable to claim 1,2,3,4,6,7 or 8 described charging devices is characterized in that, comprising:
The step that a pair of rechargeable battery charges normal;
One detects the step of cell voltage;
The step of a pair of rechargeable battery current-limiting charge, the wherein charging current of the charging current that in this step, adopts when rechargeable battery is charged normal; And
One step according to the charge tunnel of detected cell voltage control rechargeable battery when described cell voltage is lower than first setting voltage, is selected battery is carried out current-limiting charge; When described cell voltage during, select battery is charged normal more than or equal to described first setting voltage.
10, charging method according to claim 9 is characterized in that, the step of described control rechargeable battery charge tunnel is by the conducting of oxide-semiconductor control transistors or turn-offs and realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100119825A CN100416975C (en) | 2005-06-22 | 2005-06-22 | Rechargeable battery charging method and its device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100119825A CN100416975C (en) | 2005-06-22 | 2005-06-22 | Rechargeable battery charging method and its device |
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| Publication Number | Publication Date |
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| CN1885669A true CN1885669A (en) | 2006-12-27 |
| CN100416975C CN100416975C (en) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100119825A Expired - Fee Related CN100416975C (en) | 2005-06-22 | 2005-06-22 | Rechargeable battery charging method and its device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101304568B (en) * | 2007-05-11 | 2011-09-21 | 中兴通讯股份有限公司 | Apparatus and method for charging mobile terminal |
| CN104410137A (en) * | 2014-12-26 | 2015-03-11 | 青岛歌尔声学科技有限公司 | Charging protection circuit and electronic product |
| CN104753798A (en) * | 2013-12-25 | 2015-07-01 | 中兴通讯股份有限公司 | Mobile hotspot UFI equipment and startup method |
| CN105375557A (en) * | 2015-05-26 | 2016-03-02 | 深圳天珑无线科技有限公司 | Electronic equipment and charging circuit and method thereof |
| CN108258762A (en) * | 2018-01-26 | 2018-07-06 | 深圳还是威健康科技有限公司 | A kind of quick-charging circuit and intelligent terminal for pre-installing battery system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077341C (en) * | 1995-08-10 | 2002-01-02 | 索尼公司 | Charging method, charging device and integrated circuit |
| JP3669153B2 (en) * | 1998-05-27 | 2005-07-06 | 松下電器産業株式会社 | Lead-acid battery charging method |
| JP2000040533A (en) * | 1998-07-21 | 2000-02-08 | Sharp Corp | Secondary battery and charger of secondary battery |
| US6686723B1 (en) * | 2001-11-08 | 2004-02-03 | National Semiconductor Corporation | Charging circuit for deeply discharged cells |
-
2005
- 2005-06-22 CN CNB2005100119825A patent/CN100416975C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101304568B (en) * | 2007-05-11 | 2011-09-21 | 中兴通讯股份有限公司 | Apparatus and method for charging mobile terminal |
| CN104753798A (en) * | 2013-12-25 | 2015-07-01 | 中兴通讯股份有限公司 | Mobile hotspot UFI equipment and startup method |
| CN104753798B (en) * | 2013-12-25 | 2019-05-17 | 中兴通讯股份有限公司 | A kind of mobile hot spot UFI equipment and starting-up method |
| CN104410137A (en) * | 2014-12-26 | 2015-03-11 | 青岛歌尔声学科技有限公司 | Charging protection circuit and electronic product |
| CN105375557A (en) * | 2015-05-26 | 2016-03-02 | 深圳天珑无线科技有限公司 | Electronic equipment and charging circuit and method thereof |
| CN105375557B (en) * | 2015-05-26 | 2018-08-21 | 深圳天珑无线科技有限公司 | Electronic equipment and its charging circuit, charging method |
| CN108258762A (en) * | 2018-01-26 | 2018-07-06 | 深圳还是威健康科技有限公司 | A kind of quick-charging circuit and intelligent terminal for pre-installing battery system |
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| Publication number | Publication date |
|---|---|
| CN100416975C (en) | 2008-09-03 |
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