CN106374562B - Method and system for preventing charging voltage of intelligent terminal from being pulled high - Google Patents
Method and system for preventing charging voltage of intelligent terminal from being pulled high Download PDFInfo
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- CN106374562B CN106374562B CN201610833833.5A CN201610833833A CN106374562B CN 106374562 B CN106374562 B CN 106374562B CN 201610833833 A CN201610833833 A CN 201610833833A CN 106374562 B CN106374562 B CN 106374562B
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- voltage
- lithium battery
- intelligent terminal
- charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
Abstract
The invention discloses a method and a system for preventing charging voltage of an intelligent terminal from being pulled high, wherein the method comprises the following steps: when the charging voltage detection module detects that the electric quantity percentage of the lithium battery of the intelligent terminal is more than or equal to 98%, a voltage reduction instruction is sent to the power management module through the central processing unit, and finally the voltage of the lithium battery is controlled to be reduced to be output within a stable range through the power management module. The method can effectively prevent the voltage of the lithium battery of the intelligent terminal from being pulled high in the charging process, and ensure that the voltage of the lithium battery is reduced to be output in a stable and normal range, thereby effectively protecting devices in the intelligent terminal and prolonging the service life of the lithium battery.
Description
Technical Field
The invention relates to the field of mobile terminal charging, in particular to a method and a system for preventing charging voltage of an intelligent terminal from being pulled high.
Background
Under general conditions, current intelligent terminal is after charging process or charging completion, when pulling out the charger, and intelligent terminal's lithium cell voltage can be pulled high to the charging circuit of lithium cell need open work in the twinkling of an eye, and the high voltage output of lithium cell at this moment not only damages intelligent terminal internal devices easily, can reduce the life of lithium cell moreover.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the foregoing defects in the prior art, an object of the present invention is to provide a method and a system for preventing a charging voltage of an intelligent terminal from being pulled high, so as to solve the problem that after a lithium battery of an existing intelligent terminal is charged, the voltage of the battery is pulled high, which easily causes damage to a device of the intelligent terminal, and reduces the service life of the lithium battery.
The technical scheme of the invention is as follows:
a system for preventing charging voltage of an intelligent terminal from being pulled high comprises a charging voltage detection module, a central processing unit, a level conversion module and a power management module, wherein the charging voltage detection module is used for detecting the voltage and the electric quantity percentage of a lithium battery of the intelligent terminal, and when the electric quantity percentage of the lithium battery of the intelligent terminal is detected to be more than or equal to 98%, a detection signal is sent to the central processing unit; the central processing unit is used for sending an enabling signal to the level conversion module after receiving the detection signal, and sending a voltage reduction instruction to the power management module after receiving the low-voltage level signal; the level conversion module is used for converting a high-voltage level signal of the lithium battery into a low-voltage level signal after receiving an enabling signal and returning the low-voltage level signal to the central processing unit; and the power supply management module is used for controlling the voltage of the lithium battery to be reduced to be output within a stable range after receiving the voltage reduction instruction.
Preferably, the system for preventing the charging voltage of the intelligent terminal from being pulled up further comprises an external memory, the external memory is used for storing the electric quantity percentage of the lithium battery of the intelligent terminal, and the charging voltage detection module, the external memory and the central processing unit are electrically connected in sequence.
Preferably, the system for preventing the charging voltage of the intelligent terminal from being pulled up, wherein the charging voltage detection module specifically includes:
the charging voltage calculation unit is used for calculating the voltage increment in the charging process of the lithium battery;
and the charging electric quantity percentage calculating unit is used for calculating the increment of the electric quantity percentage in the charging process of the lithium battery.
Preferably, the system for preventing the charging voltage of the intelligent terminal from being pulled up, wherein the power management module specifically includes:
the charging management unit is used for controlling the charging and the interruption of the lithium battery;
and the voltage output power supply is used for controlling the voltage output of the lithium battery.
A method for preventing charging voltage of an intelligent terminal from being pulled high comprises the following steps:
A. when the intelligent terminal is charged, detecting the electric quantity percentage state of a lithium battery of the intelligent terminal through a charging voltage detection module;
B. when the percentage of the electric quantity of the lithium battery of the intelligent terminal is detected to be more than or equal to 98%, the charging voltage detection module sends a detection signal to the central processing unit;
C. after receiving the detection signal, the central processing unit sends an enabling signal to the level conversion module;
D. after receiving an enabling signal, the level conversion module converts a high-voltage level signal of the lithium battery into a low-voltage level signal and returns the low-voltage level signal to the central processing unit;
E. after receiving the low-voltage level signal, the central processing unit sends a voltage reduction instruction to the power management module;
F. and after the power supply management module receives the voltage reduction instruction, the voltage of the lithium battery is controlled to be reduced to be output within a stable range.
Preferably, the method for preventing the charging voltage of the intelligent terminal from being pulled up, wherein the step a further includes:
a1, when the intelligent terminal is charging, detecting the voltage state of the lithium battery of the intelligent terminal through the charging voltage detection module.
Preferably, the method for preventing the charging voltage of the intelligent terminal from being pulled up, wherein the step B further includes:
and B1, when the voltage of the lithium battery of the intelligent terminal is detected to be larger than the voltage threshold, the charging voltage detection module sends a detection signal to the central processing unit.
Preferably, the method for preventing the charging voltage of the intelligent terminal from being pulled up further includes:
a0, when the intelligent terminal is charged, detecting the electric quantity percentage state of the lithium battery of the intelligent terminal through a charging voltage detection module;
b0, when the percentage of the electric quantity of the lithium battery of the intelligent terminal is detected to be 100%, the charging voltage detection module sends a detection signal to the central processing unit;
c0, after receiving the detection signal, the central processing unit sends an enable signal to the level conversion module;
d0, after receiving the enable signal, the level conversion module converts the high-voltage level signal of the lithium battery into a low-voltage level signal and returns the low-voltage level signal to the central processing unit;
e0, after receiving the low voltage level signal, the central processing unit sends a charging interrupt instruction to the power management module;
and F0, after the power supply management module receives the charging interruption instruction, controlling the lithium battery to interrupt charging.
Has the advantages that: the invention discloses a method and a system for preventing charging voltage of an intelligent terminal from being pulled up, wherein when a charging voltage detection module detects that the electric quantity percentage of a lithium battery of the intelligent terminal is more than or equal to 98%, a voltage reduction instruction is sent to a power supply management module through a central processing unit, and finally the voltage of the lithium battery is controlled to be reduced to be output within a stable range through the power supply management module. The method can effectively prevent the voltage of the lithium battery of the intelligent terminal from being pulled high in the charging process, and ensure that the voltage of the lithium battery is reduced to be output in a stable and normal range, thereby effectively protecting devices in the intelligent terminal and prolonging the service life of the lithium battery.
Drawings
Fig. 1 is a flowchart of a method for preventing a charging voltage of an intelligent terminal from being pulled high according to a preferred embodiment of the present invention.
Fig. 2 is a block diagram of a system for preventing a charging voltage of an intelligent terminal from being pulled high according to a preferred embodiment of the present invention.
Detailed Description
The invention provides a method and a system for preventing charging voltage of an intelligent terminal from being pulled high, and the invention is further described in detail below in order to make the purpose, the technical scheme and the effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for preventing a charging voltage of an intelligent terminal from being pulled high according to a preferred embodiment of the present invention, as shown in fig. 1, which includes the steps of:
s100, when the intelligent terminal is charged, detecting the electric quantity percentage state of a lithium battery of the intelligent terminal through a charging voltage detection module;
specifically, in the charging process of the intelligent terminal, the electric quantity of the lithium battery stably rises according to an increment of 1%, and the charging voltage detection module comprises a charging voltage calculation unit and a charging electric quantity percentage calculation unit which are correspondingly used for calculating the increment of the voltage in the charging process of the lithium battery and the increment of the electric quantity percentage in the charging process of the lithium battery respectively.
Assuming that when the charging time of the intelligent terminal is t, the voltage increment of the lithium battery is △ V, the voltage increment reflects the state of the charging electric quantity of the lithium battery, if the voltage increment of the lithium battery is rapidly increased, the charging electric quantity of the lithium battery is rapidly increased, and if the voltage increment of the lithium battery is gradually reduced, the charging electric quantity of the lithium battery is slowly increased to 100%.
Further, according to the characteristics of lithium battery charging, when the charging capacity of the lithium battery reaches 90%, the charging voltage rises slowly, and the capacity increment is gradually reduced, namely when the charging capacity reaches 90%, the capacity percentage increment of the lithium battery is gradually reduced at intervals of time t.
S200, when the electric quantity percentage of the lithium battery of the intelligent terminal is detected to be more than or equal to 98%, the charging voltage detection module sends a detection signal to the central processing unit;
specifically, when the percentage of electric quantity of the lithium battery of the intelligent terminal is greater than or equal to 98% or when the voltage of the lithium battery of the intelligent terminal is greater than a voltage threshold value, the charging voltage detection module sends a detection signal to the central processing unit.
Preferably, the percentage of the electric quantity of the lithium battery of the intelligent terminal is stored in an external memory.
Further, the normal input and output voltage of the lithium battery of the intelligent terminal is 4.0-4.35V, preferably, the voltage threshold is set to be 4.35V, and when the charging or output voltage of the lithium battery of the intelligent terminal is greater than the voltage threshold, devices inside the intelligent terminal are easily damaged, and the service life of the lithium battery is shortened.
S300, after receiving the detection signal, the central processing unit sends an enabling signal to the level conversion module;
specifically, the enable signal is similar to a trigger signal, and the main function of the enable signal is to trigger the level conversion module to operate, and when the central processing unit receives the detection signal, the central processing unit sends the enable signal to the level conversion module, so that the level conversion module is triggered to operate.
S400, after receiving an enabling signal, the level conversion module converts a high-voltage level signal of the lithium battery into a low-voltage level signal and returns the low-voltage level signal to the central processing unit;
s500, after receiving the low-voltage level signal, the central processing unit sends a voltage reduction instruction to the power management module;
and S600, after the power supply management module receives the voltage reduction instruction, controlling the voltage of the lithium battery to be reduced to a stable range for output.
Specifically, under normal conditions, the output voltage of the lithium battery within the stable range is 4.2-4.35V, and after the power management module receives the voltage reduction instruction, the voltage of the lithium battery is controlled to be reduced to 4.2-4.35V for output, preferably, the output voltage of the lithium battery can be controlled to be 4.35V, and under the condition, devices inside the intelligent terminal can be effectively protected.
Further, when the percentage of the electric quantity of the lithium battery of the intelligent terminal is detected to be 100%, the charging voltage detection module sends a detection signal to the central processing unit; after receiving the detection signal, the central processing unit sends an enabling signal to the level conversion module; after receiving an enabling signal, the level conversion module converts a high-voltage level signal of the lithium battery into a low-voltage level signal and returns the low-voltage level signal to the central processing unit; after receiving the low-voltage level signal, the central processing unit sends a charging interruption instruction to the power management module; and after the power supply management module receives the charging interruption instruction, the charging management unit controls the lithium battery to interrupt charging.
Furthermore, when the electric quantity of the lithium battery of the intelligent mobile terminal is lower than 98%, the charging voltage increment V detected by the charging voltage detection module is gradually increased, namely the charging time t of the lithium battery is set as V, the corresponding electric quantity percentage increment is 0P, the charging time t of the lithium battery is set as 1V, the corresponding electric quantity percentage increment is 2P, the charging time t of the lithium battery is set as 3V, the corresponding electric quantity percentage increment is 4P, and so on, the charging time tn of the lithium battery is set as 5Vn, the corresponding electric quantity percentage increment is 6Pn, where t = t = t = tn, V > V > > Vn, and the electric quantity percentage P > P > Pn detected by the charging voltage detection module.
When the electric quantity of the lithium battery of the intelligent mobile terminal is in a stage lower than 98%, the intelligent terminal is in a pre-voltage reduction state, the charging voltage detection module sends a level signal to the central processing unit at the moment, the central processing unit is requested to wait for sending an enabling signal to the level conversion module, and therefore the level conversion module does not work when the lithium battery of the intelligent mobile terminal is not fully charged.
Based on the above method, the present invention further provides a system for preventing the charging voltage of the intelligent terminal from being pulled up, as shown in fig. 2, wherein the system comprises a charging voltage detection module 100, a central processing unit 200, a level conversion module 300 and a power management module 400, the charging voltage detection module 100 is configured to detect the voltage and the state of the electric quantity percentage of the lithium battery of the intelligent terminal, and when the electric quantity percentage of the lithium battery of the intelligent terminal is detected to be greater than or equal to 98%, a detection signal is sent to the central processing unit 200; the central processing unit 200 is configured to send an enable signal to the level conversion module 300 after receiving the detection signal, and send a voltage reduction instruction to the power management module 400 after receiving the low-voltage level signal; the level conversion module 300 is configured to convert a high-voltage level signal of a lithium battery into a low-voltage level signal after receiving an enable signal, and return the low-voltage level signal to the central processing unit 200; the power management module 400 is configured to control the voltage of the lithium battery to be reduced to a stable range for output after receiving the voltage reduction instruction, and the charging voltage detection module 100, the level conversion module 300, and the power management module 400 are electrically connected to the central processing unit 200.
Preferably, the system for preventing the charging voltage of the intelligent terminal from being pulled up further comprises an external memory, the external memory is used for storing the electric quantity percentage of the lithium battery of the intelligent terminal, and the charging voltage detection module, the external memory and the central processing unit are electrically connected in sequence.
Preferably, the system for preventing the charging voltage of the intelligent terminal from being pulled up, wherein the charging voltage detection module 100 specifically includes:
the charging voltage calculation unit is used for calculating the voltage increment in the charging process of the lithium battery;
and the charging electric quantity percentage calculating unit is used for calculating the increment of the electric quantity percentage in the charging process of the lithium battery.
Preferably, the system for preventing the charging voltage of the intelligent terminal from being pulled up, wherein the power management module 400 specifically includes:
the charging management unit is used for controlling the charging and the interruption of the lithium battery;
and the voltage output power supply is used for controlling the voltage output of the lithium battery.
The technical details of the above module unit have been described in the foregoing method, and thus are not described again.
In summary, the present invention discloses a method and a system for preventing a charging voltage of an intelligent terminal from being pulled up, wherein when a charging voltage detection module detects that an electric quantity percentage of a lithium battery of the intelligent terminal is greater than or equal to 98%, a voltage reduction instruction is sent to a power management module through a central processing unit, and finally, the voltage of the lithium battery is controlled to be reduced to a stable range through the power management module for output. The method can effectively prevent the voltage of the lithium battery of the intelligent terminal from being pulled high in the charging process, and ensure that the voltage of the lithium battery is reduced to be output in a stable and normal range, thereby effectively protecting devices in the intelligent terminal and prolonging the service life of the lithium battery.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. A system for preventing the voltage of a lithium battery from being pulled up when an intelligent terminal is unplugged from a charger is characterized by comprising a charging voltage detection module, a central processing unit, a level conversion module and a power management module, wherein the charging voltage detection module is used for detecting the states of the voltage and the electric quantity percentage of the lithium battery of the intelligent terminal, and when the electric quantity percentage of the lithium battery of the intelligent terminal is detected to be more than or equal to 98%, a detection signal is sent to the central processing unit; the central processing unit is used for sending an enabling signal to the level conversion module after receiving the detection signal, and sending a voltage reduction instruction to the power management module after receiving the low-voltage level signal; the level conversion module is used for converting a high-voltage level signal of the lithium battery into a low-voltage level signal after receiving an enabling signal and returning the low-voltage level signal to the central processing unit; and the power supply management module is used for controlling the voltage of the lithium battery to be reduced to be output within a stable range after receiving the voltage reduction instruction.
2. The system for preventing the voltage of the lithium battery from being pulled up when the charger is unplugged from the intelligent terminal as claimed in claim 1, further comprising an external memory, wherein the external memory is used for storing the percentage of the electric quantity of the lithium battery of the intelligent terminal, and the charging voltage detection module, the external memory and the central processing unit are electrically connected in sequence.
3. The system for preventing the voltage of the lithium battery from being pulled up when the charger is unplugged from the intelligent terminal according to claim 1, wherein the charging voltage detection module specifically comprises:
the charging voltage calculation unit is used for calculating the voltage increment in the charging process of the lithium battery;
and the charging electric quantity percentage calculating unit is used for calculating the increment of the electric quantity percentage in the charging process of the lithium battery.
4. The system for preventing the voltage of the lithium battery from being pulled up when the charger is unplugged from the intelligent terminal according to claim 1, wherein the power management module specifically comprises:
the charging management unit is used for controlling the charging and the interruption of the lithium battery;
and the voltage output power supply is used for controlling the voltage output of the lithium battery.
5. The utility model provides a method for preventing lithium cell voltage is pulled up when intelligent terminal pulls out the charger which characterized in that includes the step:
A. when the intelligent terminal is charged, detecting the electric quantity percentage state of a lithium battery of the intelligent terminal through a charging voltage detection module;
B. when the percentage of the electric quantity of the lithium battery of the intelligent terminal is detected to be more than or equal to 98%, the charging voltage detection module sends a detection signal to the central processing unit;
C. after receiving the detection signal, the central processing unit sends an enabling signal to the level conversion module;
D. after receiving an enabling signal, the level conversion module converts a high-voltage level signal of the lithium battery into a low-voltage level signal and returns the low-voltage level signal to the central processing unit;
E. after receiving the low-voltage level signal, the central processing unit sends a voltage reduction instruction to the power management module;
F. and after the power supply management module receives the voltage reduction instruction, the voltage of the lithium battery is controlled to be reduced to be output within a stable range.
6. The method for preventing the voltage of the lithium battery from being pulled up when the intelligent terminal is unplugged from the charger according to claim 5, wherein the step A further comprises the following steps:
a1, when the intelligent terminal is charging, detecting the voltage state of the lithium battery of the intelligent terminal through the charging voltage detection module.
7. The method for preventing the voltage of the lithium battery from being pulled up when the intelligent terminal is unplugged from the charger according to claim 6, wherein the step B further comprises the following steps:
and B1, when the voltage of the lithium battery of the intelligent terminal is detected to be larger than the voltage threshold, the charging voltage detection module sends a detection signal to the central processing unit.
8. The method for preventing the voltage of the lithium battery from being pulled up when the intelligent terminal is unplugged from the charger according to claim 5, further comprising:
a0, when the intelligent terminal is charged, detecting the electric quantity percentage state of the lithium battery of the intelligent terminal through a charging voltage detection module;
b0, when the percentage of the electric quantity of the lithium battery of the intelligent terminal is detected to be 100%, the charging voltage detection module sends a detection signal to the central processing unit;
c0, after receiving the detection signal, the central processing unit sends an enable signal to the level conversion module;
d0, after receiving the enable signal, the level conversion module converts the high-voltage level signal of the lithium battery into a low-voltage level signal and returns the low-voltage level signal to the central processing unit;
e0, after receiving the low voltage level signal, the central processing unit sends a charging interrupt instruction to the power management module;
and F0, after the power supply management module receives the charging interruption instruction, controlling the lithium battery to interrupt charging.
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| CN201610833833.5A CN106374562B (en) | 2016-09-20 | 2016-09-20 | Method and system for preventing charging voltage of intelligent terminal from being pulled high |
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| CN201610833833.5A CN106374562B (en) | 2016-09-20 | 2016-09-20 | Method and system for preventing charging voltage of intelligent terminal from being pulled high |
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| CN106374562B true CN106374562B (en) | 2020-04-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0415582A (en) * | 1990-05-09 | 1992-01-20 | Oki Electric Ind Co Ltd | Battery consumption display device |
| CN204407955U (en) * | 2015-01-27 | 2015-06-17 | 深圳市华宝新能源有限公司 | Fast charging and discharging portable power source |
| CN104833927B (en) * | 2015-05-15 | 2017-12-12 | 惠州Tcl移动通信有限公司 | A kind of display methods of battery electric quantity, system and mobile terminal |
| CN105871031B (en) * | 2016-05-24 | 2018-08-28 | 无锡中感微电子股份有限公司 | A kind of management of charging and discharging circuit and portable equipment |
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