CN105162078A - Terminal charging protection circuit and method, and terminal - Google Patents
Terminal charging protection circuit and method, and terminal Download PDFInfo
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- CN105162078A CN105162078A CN201510671177.9A CN201510671177A CN105162078A CN 105162078 A CN105162078 A CN 105162078A CN 201510671177 A CN201510671177 A CN 201510671177A CN 105162078 A CN105162078 A CN 105162078A
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Abstract
The invention discloses a terminal charging protection circuit and method, and a terminal. The charging protection circuit comprises an electrical core voltage detection module integrated in a cell chip and used for detecting the voltage of the cell chip; a control module connected to the electrical core voltage detection module, and used for generating a load protection instruction when identifying that a detected voltage is greater than a first set threshold; and a load protection switch connected between the cell chip and a load, connected to the control module, and used for stopping the power supply of the cell chip to the load according to the load protection instruction. According to the invention, the electrical core voltage detection module detects the voltage of the cell chip, the control module generates a load protection instruction according to a detected voltage, and the load protection switch protects the load; in case of an abnormal high voltage, the power source connection between an electrical core and the load is cut off, thereby preventing the load from being damaged.
Description
Technical field
The embodiment of the present invention relates to electronic technology field, particularly relates to a kind of charge protector of terminal and method and terminal.
Background technology
The advantages such as energy is high, cell voltage is high owing to having for lithium ion battery, working stability wide ranges and storage life are long, be widely used in military and civilian compact electric apparatus, as mobile phone, portable computer, video camera and camera etc., part instead of conventional batteries.But because of its physical characteristic, in use, lithium battery is very strict to charging current, discharging current, voltage and temperature requirement, produces serious consequence once exceed by safety He on the life-span.Therefore, lithium ion battery, in charge/discharge operation process, needs to carry out detection and control to its overcharge voltage, overdischarge voltage, key parameter such as charging Limited Current and discharging current etc., ensures the safety in using to prevent battery excessive loss simultaneously.
Current battery baffle all includes over-charge protective, Cross prevention, charge over-current, the functions such as discharge over-current.Because the situation of overtension may be run into during mobile phone charging; so cell phone charging circuit adds over-voltage protecting function; generally add overvoltage protection chip in prime; the circuit of these over-voltage protecting functions can realize charger input voltage reach a certain on automatic charge closing input in limited time, realize the overvoltage protection to circuit.
But, when battery core occurs that high pressure is accessed extremely in abnormal pressure or battery core side, the high pressure of battery core part directly supply can use the load of power supply, just may damage load when voltage reaches certain value, meanwhile, too high voltage also can cause damage to the components and parts in circuit.
Summary of the invention
The invention provides a kind of charge protector of terminal and method and terminal, to realize, when abnormal pressure appears in battery core, carrying out available protecting to load.
For reaching this object, the present invention by the following technical solutions:
First aspect, embodiments provides a kind of charge protector of terminal, comprises
Battery core voltage detection module, is integrated in battery chip inside, for detecting the voltage of battery chip;
Control module, is connected with described battery core voltage detection module, when the voltage for recognizing detection is greater than the first setting threshold value, produces load protection instruction;
Load protection switch, is connected between battery chip and load, and is connected with described control module, for disconnecting the power supply of described battery chip to described load according to described load protection instruction.
Second aspect, the embodiment of the present invention additionally provides a kind of charge protection method of terminal, comprising:
The voltage of battery chip is detected by described battery core voltage detection module;
When the voltage recognizing detection by described control module is greater than the first setting threshold value, produce load protection instruction;
By described load protection command to load protection switch, disconnect the power supply of described battery chip to described load to control described load protection switch according to described load protection instruction.
The third aspect, the embodiment of the present invention additionally provides a kind of terminal, comprises battery and battery chip, also comprises the charge protector of the terminal described in first aspect.
The present invention detects the voltage of battery chip by battery core voltage detection module; control module judges to produce load protection instruction according to the voltage swing detected; then by load protection switch, load is protected; when there is abnormal pressure; cut off battery core to be connected with the power supply of load, thus protection load is not damaged.
Accompanying drawing explanation
In order to the technical scheme of exemplary embodiment of the present is clearly described, one is done to the accompanying drawing used required for describing in embodiment below and simply introduce.Obviously, the accompanying drawing introduced is the accompanying drawing of a part of embodiment that the present invention will describe, instead of whole accompanying drawings, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the charge protector structural representation of a kind of terminal that the embodiment of the present invention one provides;
Fig. 2 is the charge protector structural representation of a kind of terminal that the embodiment of the present invention two provides;
Fig. 3 is the charge protector structural representation of a kind of terminal that the embodiment of the present invention three provides;
Fig. 4 is the schematic flow sheet of the charge protection method of a kind of terminal that the embodiment of the present invention four provides.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not entire infrastructure.
Before in further detail exemplary embodiment being discussed, it should be mentioned that some exemplary embodiments are described as the process or method described as flow chart.Although every step is described as the process of order by flow chart, many steps wherein can be implemented concurrently, concomitantly or simultaneously.In addition, the order of every step can be rearranged.When its step completes, described process can be terminated, but can also have the additional step do not comprised in the accompanying drawings.Described process can correspond to method, function, code, subroutine, subprogram etc.
Embodiment one
Fig. 1 is the charge protector structural representation of a kind of terminal that the embodiment of the present invention one provides; this circuit structure can be applied in be needed arbitrarily to provide in the terminal of charge protection; as shown in Figure 1, this structure specifically comprises: battery core voltage detection module 110, control module 120 and load protection switch 130.
Wherein, battery core voltage detection module 110, is integrated in battery chip inside, for detecting the voltage of battery chip; Control module 120, is connected with described battery core voltage detection module, when the voltage for recognizing detection is greater than the first setting threshold value, produces load protection instruction; Load protection switch 130, is connected between battery chip and load, and is connected with described control module 120, for disconnecting the power supply of described battery chip to described load according to described load protection instruction.
Exemplary, described first setting threshold value is 6V-7V, can be preferably 6.5V.Described load protection switch adopts the metal-oxide semiconductor fieldeffect transistor (Metal-Oxid-Semiconductor field-effect transistor, metal-oxide-semiconductor) being in series with diode.Further, when battery core voltage detection module 110 detects battery core voltage higher than the first setting threshold value (U1), V1MOS pipe is closed, and cut off battery chip and be connected with the power supply of load, protection load is not damaged.
The charge protector of a kind of terminal that the embodiment of the present invention one provides; the voltage of battery chip is detected by battery core voltage detection module; control module judges to produce load protection instruction according to the voltage swing detected; then by load protection switch, load is protected; when there is abnormal pressure; cut off battery core to be connected with the power supply of load, thus protection load is not damaged.
Embodiment two
Fig. 2 is the charge protector structural representation of a kind of terminal that the embodiment of the present invention two provides; further; the embodiment of the present invention provides a kind of overcharge protection circuit structure; as shown in Figure 2, this structure specifically comprises: battery core voltage detection module 110, control module 120 and over-charge protective switch 140.
Wherein, battery core voltage detection module 110, is integrated in battery chip inside, for detecting the voltage of battery chip; Control module 120, is connected with described battery core voltage detection module, when the voltage for recognizing detection is greater than the second setting threshold value, produces over-charge protective instruction; Over-charge protective switch 140, is connected between described battery chip and charging inlet, and is connected with described control module 120, for disconnecting the charging of described charging inlet to battery chip according to described over-charge protective instruction.
Exemplary, described second setting threshold value is 4V-4.5V, can be preferably 4.35V.Described over-charge protective switch adopts the metal-oxide-semiconductor being in series with diode.Further, when battery core voltage detection module 110 detects battery core voltage higher than the second setting threshold value (U2), V2MOS pipe is closed, and cuts off the connection of battery core and charging inlet, stops charging, realizes over-charge protective function.Further, under over-charge protective state, the body diode of V2 still can conducting, makes battery can to load supplying.
The charge protector of a kind of terminal that the embodiment of the present invention two provides; the voltage of battery chip is detected by battery core voltage detection module; control module judges to produce over-charge protective instruction according to the voltage swing detected; then over-charge protective function is realized by over-charge protective switch; under over-charge protective state; the body diode of V2 still can conducting, makes battery can to load supplying.
Embodiment three
Fig. 3 is the charge protector structural representation of a kind of terminal that the embodiment of the present invention three provides, and the technical scheme of the present embodiment, based on above-described embodiment one and embodiment two, the basis of embodiment one and embodiment two is done further optimize.
As shown in Figure 3, battery core voltage detection module 110 is integrated in battery chip inside, and described battery chip can be installed on battery pack or application system is inner.Control module 120 is connected with described battery core voltage detection module 110, when the voltage recognizing battery core voltage detection module 110 detection is greater than the first setting threshold value, load protection switch 130 is acted on by producing load protection instruction, when the voltage recognizing battery core voltage detection module 110 detection is greater than the second setting threshold value, over-charge protective switch 140 is acted on by producing over-charge protective instruction, further, described load protection switch 130 is arranged in series with over-charge protective switch 140, load protection switch 130 is connected between battery chip and load, over-charge protective switch 140 is connected between battery chip and charging inlet, further, load protection switch 130 and over-charge protective switch 140 adopt metal-oxide-semiconductor V1 and V2 being in series with diode respectively.
Exemplary, described first setting threshold value is greater than described second setting threshold value.When starting to charge, V1MOS pipe, V2MOS pipe are all in open mode, and the body diode of V1 and the body diode of V2 can conductings, it should be noted that the body diode direction of the body diode of V1 and V2 is contrary, are respectively used to the situation of charging and discharging.When battery core voltage detection module detects that battery core voltage is less than the second setting threshold value, now can charge normal also can normally to load discharge for battery, and proof load normally uses; When battery core voltage detection module detects that battery core voltage is greater than the second setting threshold value and is less than the first setting threshold value, now V1MOS pipe is opened, and V2MOS pipe turns off, and now battery does not recharge but can normally to load discharge, and proof load normally uses; When battery core voltage detection module detects that battery core voltage is greater than the first setting threshold value; namely judge that abnormal pressure appears in battery core end, continue load supplying just possibility breaking load, now V1MOS pipe turns off; cut off battery core to be connected with the power supply between load, protection load is not destroyed.
Further, also comprise resistance R1 and electric capacity C1 in described charge protector, described resistance and electric capacity all shield to circuit.
The charge protector of a kind of terminal that the embodiment of the present invention three provides; the voltage of battery chip is detected by battery core voltage detection module; control module judges to produce load protection instruction or over-charge protective instruction according to the voltage swing detected; then managed by load protection switch or over-charge protective switch control VIMOS or the opening or turning off of V2MOS pipe, realize load protection function or over-charge protective function.When there is abnormal pressure, cut off battery core and be connected with the power supply of load, thus protection load is not damaged; Under over-charge protective state, the body diode of V2 still can conducting, makes battery can to load supplying; When battery core voltage is less than the second setting threshold value, now battery can normally discharge and recharge.
Embodiment four
Fig. 4 is the schematic flow sheet of the charge protection method of a kind of terminal that the embodiment of the present invention four provides, and this charge protection method can be applied in any charge protector, and can be applied in and need arbitrarily to provide in the terminal of charge protection.As shown in Figure 4, the method specifically comprises:
S210, detected the voltage of battery chip by described battery core voltage detection module;
When S220, the voltage being recognized detection by described control module are greater than the first setting threshold value, produce load protection instruction;
Exemplary, described first setting threshold value is 6V-7V, can be preferably 6.5V, when the voltage recognizing detection is greater than the first setting threshold value, is now defaulted as battery core and occurs that high pressure is accessed extremely in abnormal pressure or battery core side, produce load protection instruction.
S230, by described load protection command to load protection switch, disconnect the power supply of described battery chip to described load to control described load protection switch according to described load protection instruction.
Exemplary, described load protection switch adopts the metal-oxide-semiconductor V1 being in series with diode, and when described metal-oxide-semiconductor receives load protection instruction, V1MOS pipe is closed, and cut off battery core and be connected with the power supply of load, protection load is not damaged.
Further, this charge protection method also comprises:
If when the voltage recognizing detection by described control module is greater than the second setting threshold value, produce over-charge protective instruction;
Exemplary, described second setting threshold value is 4V-4.5V, can be preferably 4.35V, when the voltage recognizing detection is greater than the second setting threshold value and is less than the first setting threshold value, now be defaulted as and reach over-voltage protection point, produce over-charge protective instruction.
By described over-charge protective command to over-charge protective switch, disconnect the charging of described charging inlet to battery chip to control described over-charge protective switch according to described over-charge protective instruction.
Exemplary, described over-charge protective switch adopts the metal-oxide-semiconductor V2 being in series with diode, and when described metal-oxide-semiconductor receives over-charge protective instruction, V2MOS pipe is closed, and cuts off the connection of battery core and charging inlet, stops charging, realizes over-charge protective function.Further, under over-charge protective state, the body diode of V2 still can conducting, makes battery can to load supplying.
Further, if when the voltage recognizing detection by described control module is less than the second setting threshold value, now V1MOS pipe, V2MOS pipe are all in open mode, the body diode of V1 and the body diode of V2 can conductings, now can charge normal also can normally to load discharge for battery, and proof load normally uses.
The charge protection method of a kind of terminal that the embodiment of the present invention four provides; the voltage of battery chip is detected by battery core voltage detection module; the voltage swing being recognized detection by control module judges to produce load protection instruction or over-charge protective instruction, then realizes load protection function or over-charge protective function to corresponding load protection switch or over-charge protective switch load protection instruction or over-charge protective command.When there is abnormal pressure, cut off battery core and be connected with the power supply of load, thus protection load is not damaged; Under over-charge protective state, the body diode of V2 still can conducting, makes battery can to load supplying; When battery core voltage is less than the second setting threshold value, now battery can normally discharge and recharge.By judging different operating states to the voltage of the battery chip detected, and then realize different circuit functions.
The embodiment of the present invention additionally provides a kind of terminal, and described terminal specifically comprises: battery and battery chip, also comprises the charge protector of the terminal mentioned in any embodiment of the present invention.
Concrete, described battery chip needs the overcharge voltage to battery, overdischarge voltage, key parameter such as charging Limited Current and discharging current etc. carries out detection and control, for preventing battery excessive loss, the safety in battery and terminal use can be ensured simultaneously.
Further, described terminal can be mobile phone, panel computer or other need to provide the terminal equipment of charge protection.
The charge protection method of a kind of terminal for providing according to the embodiment of the present invention that the embodiment of the present invention provides; the charge protector that the application embodiment of the present invention provides; reach the object of charge protection, possess and perform the corresponding functional module of said method and beneficial effect.The not ins and outs of detailed description in the present embodiment, the circuit that can provide see the above embodiment of the present invention and method.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (8)
1. a charge protector for terminal, is characterized in that, comprising:
Battery core voltage detection module, is integrated in battery chip inside, for detecting the voltage of battery chip;
Control module, is connected with described battery core voltage detection module, when the voltage for recognizing detection is greater than the first setting threshold value, produces load protection instruction;
Load protection switch, is connected between battery chip and load, and is connected with described control module, for disconnecting the power supply of described battery chip to described load according to described load protection instruction.
2. circuit according to claim 1, is characterized in that:
When the voltage of described control module also for recognizing detection is greater than the second setting threshold value, produce over-charge protective instruction;
Described circuit also comprises over-charge protective switch, is connected between described battery chip and charging inlet, and is connected with described control module, for disconnecting the charging of described charging inlet to battery chip according to described over-charge protective instruction.
3. circuit according to claim 2, is characterized in that: described first setting threshold value is greater than described second setting threshold value.
4. circuit according to claim 3, is characterized in that, described first setting threshold value is 6V-7V, and the second setting threshold value is 4V-4.5V.
5. circuit according to claim 2, is characterized in that:
Described load protection switch and over-charge protective switch adopt the metal-oxide semiconductor fieldeffect transistor being in series with diode respectively.
6. a terminal, comprises battery and battery chip, it is characterized in that, also comprises the charge protector of the arbitrary described terminal of claim 1-5.
7. a charge protection method for terminal, is characterized in that, adopts terminal according to claim 6 to perform, and described method comprises:
The voltage of battery chip is detected by described battery core voltage detection module;
When the voltage recognizing detection by described control module is greater than the first setting threshold value, produce load protection instruction;
By described load protection command to load protection switch, disconnect the power supply of described battery chip to described load to control described load protection switch according to described load protection instruction.
8. method according to claim 7, is characterized in that, also comprises:
If when the voltage recognizing detection by described control module is greater than the second setting threshold value, produce over-charge protective instruction;
By described over-charge protective command to over-charge protective switch, disconnect the charging of described charging inlet to battery chip to control described over-charge protective switch according to described over-charge protective instruction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510671177.9A CN105162078B (en) | 2015-10-15 | 2015-10-15 | The charge protector and method and terminal of a kind of terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510671177.9A CN105162078B (en) | 2015-10-15 | 2015-10-15 | The charge protector and method and terminal of a kind of terminal |
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| CN105162078A true CN105162078A (en) | 2015-12-16 |
| CN105162078B CN105162078B (en) | 2018-02-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109478789A (en) * | 2016-10-13 | 2019-03-15 | 深圳市道通智能航空技术有限公司 | A kind of charging circuit and device |
| CN114158781A (en) * | 2021-10-27 | 2022-03-11 | 海南摩尔兄弟科技有限公司 | Electronic device, battery pole applying same and electronic atomization device |
| CN117458424A (en) * | 2023-11-09 | 2024-01-26 | 睿尔曼智能科技（北京）有限公司 | Automatic power supply switching device, power supply control system and control method |
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| US20130170086A1 (en) * | 2011-12-30 | 2013-07-04 | Ying-Zheng Li | Overvoltage protection circuit and portable electronic device comprising same |
| CN203466560U (en) * | 2013-08-27 | 2014-03-05 | 鞍山市同益光电科技有限公司 | Intelligent lithium battery guide plate |
| CN204578841U (en) * | 2015-04-23 | 2015-08-19 | 南通理工学院 | A kind of safety-type photovoltaic intelligent illuminating system for public toilet |
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| CN102570406A (en) * | 2011-12-09 | 2012-07-11 | 无锡中星微电子有限公司 | Battery protection device |
| US20130170086A1 (en) * | 2011-12-30 | 2013-07-04 | Ying-Zheng Li | Overvoltage protection circuit and portable electronic device comprising same |
| CN203466560U (en) * | 2013-08-27 | 2014-03-05 | 鞍山市同益光电科技有限公司 | Intelligent lithium battery guide plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109478789A (en) * | 2016-10-13 | 2019-03-15 | 深圳市道通智能航空技术有限公司 | A kind of charging circuit and device |
| CN114158781A (en) * | 2021-10-27 | 2022-03-11 | 海南摩尔兄弟科技有限公司 | Electronic device, battery pole applying same and electronic atomization device |
| CN114158781B (en) * | 2021-10-27 | 2024-05-14 | 海南摩尔兄弟科技有限公司 | Electronic device, battery rod applying same and electronic atomization device |
| CN117458424A (en) * | 2023-11-09 | 2024-01-26 | 睿尔曼智能科技（北京）有限公司 | Automatic power supply switching device, power supply control system and control method |
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| CN105162078B (en) | 2018-02-23 |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |