CN1881734A - Terminal circuit and its charge controlling method - Google Patents
Terminal circuit and its charge controlling method Download PDFInfo
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- CN1881734A CN1881734A CN 200510076986 CN200510076986A CN1881734A CN 1881734 A CN1881734 A CN 1881734A CN 200510076986 CN200510076986 CN 200510076986 CN 200510076986 A CN200510076986 A CN 200510076986A CN 1881734 A CN1881734 A CN 1881734A
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- 238000001514 detection method Methods 0.000 claims description 20
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The invention relates to a terminating circuit which can charge battery in terminal, and a relative charge control method, for solving the problem of present technique that unable to enter into the constant current charge process, wherein said charge process at least comprises the trickling charge process and constant-current process; said control comprises that in the trickling charge process, cutting off the power supply of the terminal operating circuit; and in the end of trickling charge process or in the constant current charge process,connecting the power supply. And the invention also provides a terminating circuit which comprises a battery, the first control circuit controlling the charge of battery, an operating circuit, an operating circuit switch, and the second control circuit that closing the switch only when terminal voltage is not less than preset threshold value.
Description
Technical field
The present invention relates to communication terminal, relate in particular to a kind of terminating circuit and charge control method thereof that can in terminal, charge battery.
Background technology
Present many hand held terminal units all use powered battery, mobile phone for example, and low situation can appear in cell voltage after terminal or battery are placed for a long time, in order to ensure battery performance and life-span, requires to cross when low at cell voltage battery is carried out trickle charge.As shown in Figure 1, Fig. 1 is the battery charging process schematic diagram, solid-line curve is represented the variation of charging voltage, and imaginary curve is represented the variation of charging current, can see that the charging of battery comprises trickle charge, three processes of constant current charge and constant voltage charge, wherein, when cell voltage during less than Ub, adopt the trickle charge process, charging current Ia is less, cell voltage increases gradually, be charged to when cell voltage reaches Ub behind the constant volume, the beginning constant current charge is charged as current Ib, cell voltage continues to increase, when cell voltage reaches Uc, enter the constant voltage charge process at last, charging voltage is constant, charging current reduces gradually, up to electric current during less than Ic battery be full of.Present most battery charge chip is all according to these three process control battery charge, but there is certain charging hidden danger in existing charge control method.
Existing terminating circuit design is all fairly simple, as shown in Figure 2, comprises the charging control circuit of switch, battery and this battery of terminal works circuit, this operating circuit; After plugging charger, start battery charge, open the switch of terminal works circuit simultaneously, operating circuit work is connected show charged state.In the trickle charge process, because trickle-charge current A is very little, after the terminal power circuit is opened, if the electric current of charging management chip output is too little, be not enough to satisfy the electric current B requirement of terminating circuit, even can cause that battery is counter irritates, as shown in Figure 2, battery is irritated to mobile phone circuit is counter according to the direction of electric current C; When cell voltage was too low, B was very little for electric current, and terminating circuit quits work, and charging management chip is given terminal trickle charge, and when cell voltage was elevated to a certain degree, terminating circuit was reworked, and battery begins discharge; And so forth, battery can not enter next charged state all the time, finally can't be full of electricity, deadlock occurs.If charging management chip strengthens the electric current of output,, can not guarantee the requirement of trickle charge again because of the uncertainty of terminal operating status.
Summary of the invention
The invention provides a kind of terminating circuit and charge control method thereof, when on terminal, charging the battery in the prior art, can't enter the problem of constant current charge process to solve.
The control method that a kind of battery charges in terminal, described terminal comprises operating circuit, and the charging process of described battery comprises the trickle charge process at least, and described control method comprises the steps:
In described trickle charge process, disconnect the power supply of described operating circuit; And
When described trickle charge process finishes or after having finished, begin to connect the power supply of described operating circuit.
Described when the trickle charge process finishes, the method that begins to connect described operating circuit power supply comprises the steps: the setting voltage threshold value, the terminal voltage of this first voltage threshold equals described trickle charge process when finishing battery; Detect the terminal voltage in the battery charging process, when battery terminal voltage arrives described first voltage threshold, begin to connect the power supply of described operating circuit.
Described after the trickle charge process finishes, the method that begins to connect described operating circuit power supply comprises the steps: to set second voltage threshold, the terminal voltage of battery when this second voltage threshold finishes greater than described trickle charge process; Detect the terminal voltage in the battery charging process, when battery terminal voltage arrives described second voltage threshold, begin to connect the power supply of described operating circuit.
A kind of terminating circuit, comprise: the switch of the first control circuit of control terminal battery charge, the operating circuit of this terminal and this terminal works circuit, charging current is handled the back described battery of input through first control circuit and is charged, the while through described switch to this terminal works circuit supply; Also comprise:
Control the second control circuit of described switch, detect the terminal voltage of described battery, when this terminal voltage arrives or surpass the threshold value of setting, closed described switch; Otherwise,, disconnect described switch when this terminal voltage during less than the threshold value set; Described threshold value is equal to or greater than in the described battery charging process, the terminal voltage of battery when the trickle charge process finishes.
Described second control circuit comprises: voltage detection unit and switch control unit, described voltage detection unit detects the terminal voltage of anode and exports to described switch control unit, by this switch control unit when battery terminal voltage arrives or surpass the threshold value of setting, closed described switch.
Described voltage detection unit comprises a NPN switch triode T1 and the 2nd PNP switch triode T2, and wherein: the base stage of T1 connects charge power supply input, grounded emitter, collector electrode connect T2 by resistance base stage by resistance; The emitter of T2 connects anode, collector electrode to the switch control unit output detection signal.
Described switch control unit is that R3112 series integrated circuit is one of any, and this integrated circuit comprises: connect the input pin of described voltage detection unit output, be used to receive the detection voltage of this voltage detection unit output; And the output pin that connects described switch, be used for when the detection voltage that receives arrives the setting threshold value to this switch output control signal.
Use technical scheme of the present invention, by battery terminal voltage is detected, in battery trickle charge process, terminal voltage crosses the operating circuit of disconnected end when low, and charging current is only charged to powered battery; After terminal voltage rose to certain value, battery and finishes the trickle charge process, the operating circuit that opens a terminal again made charging current when powered battery is charged, divides the operating circuit that flows to terminal power supply.Avoided the endless loop of trickle charge process like this, thereby guaranteed that battery can be according to normal sequential charging, the useful life that has ensured battery quality, improved battery.
Description of drawings
Fig. 1 is the battery charging process schematic diagram, comprises trickle charge process and constant current charge process respectively;
Fig. 2 is the charging circuit structural representation of terminal in the prior art;
Fig. 3 is the variation that utilizes voltage detecting and controling circuit to detect terminal voltage in the battery charging process of the present invention, controls the method principle schematic of battery charging process;
Fig. 4 is the structured flowchart of voltage detecting and controling circuit among Fig. 3;
Fig. 5 is a concrete circuit of implementing of the structured flowchart of voltage detecting and controling circuit shown in Figure 4.
Embodiment
Below on mobile phone, using the execution mode of technical solution of the present invention, and be described with reference to the accompanying drawings the present invention.
The design of technical scheme of the present invention as shown in Figure 3, for avoiding the endless loop of trickle charge process, the present invention has increased the control circuit of terminal works circuit power switch in terminating circuit, be used to detect the terminal voltage of battery, when battery in the trickle charge process, cut-off switch is not powered to the operating circuit of terminal; After the trickle charge process finished, perhaps after battery had entered the constant current charge process, power circuit again opened a terminal.
For finishing above-mentioned thinking, a kind of optional method is: preestablish a voltage threshold Uo, Uo equals or is slightly larger than Ub, in battery charging process, detect the terminal voltage of battery, when terminal voltage reaches setting voltage threshold value Uo, illustrate that the trickle charge process just finishes or finishes before, at this moment connect the operating circuit power supply of terminal again, just can guarantee that battery can describe in detail below according to normal sequential charging.
As shown in Figure 4, Fig. 4 is the voltage detecting and controling circuit principle schematic, voltage detecting and controling circuit generally is made up of battery terminal voltage detecting unit 1 and switch control unit 2 two parts, battery terminal voltage detecting unit 1 is used to detect the terminal voltage of battery and exports to switch control unit 2, when switch control unit 2 reaches the voltage threshold Uo of setting in terminal voltage, to switch output control signal, make switch closure connect the power supply of operating handset circuit.
The concrete course of work is: when connecting charger, charge power supply is connected, the terminal voltage of voltage detecting and controling circuit operation detection battery, when battery terminal voltage is lower than setting voltage threshold value Uo, " turn-off the mobile phone circuit switch; mobile phone is not worked, electric current B as shown in Figure 1 approximates zero, and the electric current of charging control unit output is all imported battery and charged.When cell voltage arrives or surpass the voltage threshold Uo that sets, battery has possessed enough capacity, charging process has been finished trickle charge, enter the constant current charge process, the switch of the closed operating handset circuit of mobile phone circuit switch controlling signal, mobile phone is started working, and charging current A to the mobile phone circuit power supply, charges the battery on the one hand on the other hand.
As shown in Figure 5, Fig. 5 is a kind of physical circuit embodiment of voltage detecting and controling circuit shown in Figure 4, voltage detection unit 1 can use a NPN switch triode T1 and a PNP switch triode T2 to be connected to form, the base stage 12 of T1 connects charge power supply by resistance, emitter 11 ground connection, collector electrode 16 connects T2 base stage 15 by resistance, and T2 emitter 14 connects the positive pole of battery, and collector electrode 13 is to the switch control unit output detection signal.The course of work is:
1, charge power supply is connected, the T1 conducting, and the cathode voltage of battery is added to the T2 base stage after by electric resistance partial pressure; Because the terminal voltage of battery when beginning to charge is very low, therefore, T2 by, collector electrode 13 is output as zero.
2, battery charge is carried out to a certain degree, and battery terminal voltage raises, when being elevated to certain value, and the T2 conducting, the output voltage of collector electrode 13 is a battery terminal voltage.
By selecting the concrete resistance of resistance in the circuit, can control T2 conducting when battery terminal voltage rises to certain value.
Switch control unit 2 is generally selected R3112 series integrated circuit for use, the R3112Q301A-TR integrated circuit shown in Fig. 5 for example, devices such as the built-in reference voltage source Verf of this integrated circuit, COMS transistor, comparator, inverter and resistance, the output 13 of pin two 1 joint detection unit 1, pin two 2 ground connection, 23 are passed through capacity earth, pin two 4 is at the input voltage of pin two 1 during greater than reference voltage, the control signal of output switch, during less than reference voltage, be output as zero at the input voltage of pin two 1.Like this, when reference voltage is adjusted into Uo, enter the constant current charge process when rising to the trickle charge end or after finishing with regard to the terminal voltage that can be implemented in battery, open the operating circuit of switch connection mobile phone again, make mobile phone enter the charging show state, thereby avoided the endless loop in the trickle charge process.
Above circuit only is a specific embodiment, and according to technical scheme of the present invention, those skilled in the art can realize polytype circuit structure, and any equivalent configurations all should be included within protection scope of the present invention.
In sum, the charge control method of terminal of the present invention comprises the steps:
S1, in described trickle charge process, disconnect the power supply of this terminal works circuit;
In the trickle charge process, the battery capacity deficiency disconnects the power supply of the operating circuit of this terminal, avoids the appearance of endless loop.
S2, when described trickle charge process finishes or in described constant current charge process is carried out, connect the power supply of this terminal works circuit;
Finish in the trickle charge process, perhaps enter the constant current charge process after, when battery capacity reaches requirement and can not form endless loop again, connect the power supply of the operating circuit of terminal, the charged state of display terminal.
According to the present invention, the determination methods that is in that concrete state during terminal charge can be: preestablish a voltage threshold Uo, terminal voltage Ub when Uo finishes more than or equal to battery trickle charge process, in battery charging process, detect the terminal voltage in the battery charging process, when terminal voltage reaches setting voltage threshold value Uo, illustrate that the trickle charge process finishes, at this moment connect the operating circuit power supply of terminal again, just can guarantee that battery can be according to normal sequential charging.
Like this, come turning on and off of control terminal operating circuit power supply, avoided the endless loop that the trickle charge process may occur, guaranteed that battery can charge according to normal sequential, thereby ensured battery quality and useful life according to the charged state of battery.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1, a kind of battery control method of in terminal, charging, described terminal comprises operating circuit, and the charging process of described battery comprises the trickle charge process at least, it is characterized in that, and described control method comprises the steps:
In described trickle charge process, disconnect the power supply of described operating circuit; And
When described trickle charge process finishes or after having finished, begin to connect the power supply of described operating circuit.
2, the method for claim 1 is characterized in that, and is described when the trickle charge process finishes, and the method that begins to connect described operating circuit power supply comprises the steps:
The terminal voltage of battery when setting voltage threshold value, this first voltage threshold equal described trickle charge process and finish;
Detect the terminal voltage in the battery charging process, when battery terminal voltage arrives described first voltage threshold, begin to connect the power supply of described operating circuit.
3, the method for claim 1 is characterized in that, and is described after the trickle charge process finishes, and the method that begins to connect described operating circuit power supply comprises the steps:
Set second voltage threshold, the terminal voltage of battery when this second voltage threshold finishes greater than described trickle charge process;
Detect the terminal voltage in the battery charging process, when battery terminal voltage arrives described second voltage threshold, begin to connect the power supply of described operating circuit.
4, a kind of terminating circuit, comprise: the switch of the first control circuit of control terminal battery charge, the operating circuit of this terminal and this terminal works circuit, charging current is handled the back described battery of input through first control circuit and is charged, the while through described switch to this terminal works circuit supply; It is characterized in that described terminating circuit also comprises:
Control the second control circuit of described switch, detect the terminal voltage of described battery, when this terminal voltage arrives or surpass the threshold value of setting, closed described switch; Otherwise,, disconnect described switch when this terminal voltage during less than the threshold value set; Described threshold value is equal to or greater than in the described battery charging process, the terminal voltage of battery when the trickle charge process finishes.
5, method as claimed in claim 4, it is characterized in that, described second control circuit comprises: voltage detection unit and switch control unit, described voltage detection unit detects the terminal voltage of anode and exports to described switch control unit, by this switch control unit when battery terminal voltage arrives or surpass the threshold value of setting, closed described switch.
6, method as claimed in claim 4, it is characterized in that, described voltage detection unit comprises a NPN switch triode T1 and the 2nd PNP switch triode T2, and wherein: the base stage of T1 connects charge power supply input, grounded emitter, collector electrode connect T2 by resistance base stage by resistance; The emitter of T2 connects anode, collector electrode to the switch control unit output detection signal.
As claim 5 or 6 described methods, it is characterized in that 7, described switch control unit is that R3112 series integrated circuit is one of any, this integrated circuit comprises:
The input pin that connects described voltage detection unit output is used to receive the detection voltage that this voltage detection unit is exported; And
The output pin that connects described switch is used for when the detection voltage that receives arrives the setting threshold value to this switch output control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100769861A CN100342616C (en) | 2005-06-13 | 2005-06-13 | Terminal circuit and its charge controlling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100769861A CN100342616C (en) | 2005-06-13 | 2005-06-13 | Terminal circuit and its charge controlling method |
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| CN1881734A true CN1881734A (en) | 2006-12-20 |
| CN100342616C CN100342616C (en) | 2007-10-10 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101312296B (en) * | 2007-05-23 | 2010-12-22 | 仁宝电脑工业股份有限公司 | Charging method of battery module |
| US8022670B2 (en) | 2007-01-11 | 2011-09-20 | Compal Electronics, Inc. | Method for charging battery module |
| CN102255288A (en) * | 2011-06-28 | 2011-11-23 | 深圳Tcl新技术有限公司 | Pair of 3D (3-dimensional) glasses and charging protector thereof |
| CN102510047A (en) * | 2011-11-15 | 2012-06-20 | 深圳Tcl新技术有限公司 | Charge and discharge protection device for 3D (three-dimensional) glasses |
| CN101931249B (en) * | 2009-06-25 | 2012-09-19 | 鸿富锦精密工业（深圳）有限公司 | Electronic device capable of indicating battery charged state |
| CN106575800A (en) * | 2014-07-23 | 2017-04-19 | 法国电力公司 | Charge control of a metal-air battery |
| CN108475935A (en) * | 2016-11-30 | 2018-08-31 | 华为技术有限公司 | A kind of battery charging management method and terminal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5569550A (en) * | 1995-02-03 | 1996-10-29 | Motorola, Inc. | Battery pack having under-voltage and over-voltage protection |
| US5691622A (en) * | 1995-12-26 | 1997-11-25 | Motorola, Inc. | Idle current cutoff circuit |
| SE514722C2 (en) * | 1999-01-27 | 2001-04-09 | Ericsson Telefon Ab L M | Method and apparatus for charging a battery-powered device |
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2005
- 2005-06-13 CN CNB2005100769861A patent/CN100342616C/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8022670B2 (en) | 2007-01-11 | 2011-09-20 | Compal Electronics, Inc. | Method for charging battery module |
| CN101312296B (en) * | 2007-05-23 | 2010-12-22 | 仁宝电脑工业股份有限公司 | Charging method of battery module |
| CN101931249B (en) * | 2009-06-25 | 2012-09-19 | 鸿富锦精密工业（深圳）有限公司 | Electronic device capable of indicating battery charged state |
| CN102255288A (en) * | 2011-06-28 | 2011-11-23 | 深圳Tcl新技术有限公司 | Pair of 3D (3-dimensional) glasses and charging protector thereof |
| CN102255288B (en) * | 2011-06-28 | 2014-11-26 | 深圳Tcl新技术有限公司 | Pair of 3D (3-dimensional) glasses and charging protector thereof |
| CN102510047A (en) * | 2011-11-15 | 2012-06-20 | 深圳Tcl新技术有限公司 | Charge and discharge protection device for 3D (three-dimensional) glasses |
| CN102510047B (en) * | 2011-11-15 | 2014-11-26 | 深圳Tcl新技术有限公司 | Charge and discharge protection device for 3D (three-dimensional) glasses |
| CN106575800A (en) * | 2014-07-23 | 2017-04-19 | 法国电力公司 | Charge control of a metal-air battery |
| CN106575800B (en) * | 2014-07-23 | 2018-03-23 | 法国电力公司 | The charge control of metal-air battery group |
| CN108475935A (en) * | 2016-11-30 | 2018-08-31 | 华为技术有限公司 | A kind of battery charging management method and terminal |
| CN108475935B (en) * | 2016-11-30 | 2021-06-01 | 华为技术有限公司 | Battery charging management method and terminal |
| US11056905B2 (en) | 2016-11-30 | 2021-07-06 | Huawei Technologies Co., Ltd. | Battery charging management method and terminal |
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| Publication number | Publication date |
|---|---|
| CN100342616C (en) | 2007-10-10 |
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Address after: 518129 Building 2, B District, Bantian HUAWEI base, Longgang District, Shenzhen, Guangdong. Patentee after: Huawei terminal (Shenzhen) Co.,Ltd. Address before: 518129 Building 2, B District, Bantian HUAWEI base, Longgang District, Shenzhen, Guangdong. Patentee before: HUAWEI DEVICE Co.,Ltd. |
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Effective date of registration: 20181219 Address after: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee after: HUAWEI DEVICE Co.,Ltd. Address before: 518129 Building 2, B District, Bantian HUAWEI base, Longgang District, Shenzhen, Guangdong. Patentee before: Huawei terminal (Shenzhen) Co.,Ltd. |