CN107834653B - Battery control circuit of mobile terminal and mobile terminal - Google Patents
Battery control circuit of mobile terminal and mobile terminal Download PDFInfo
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- CN107834653B CN107834653B CN201711217133.4A CN201711217133A CN107834653B CN 107834653 B CN107834653 B CN 107834653B CN 201711217133 A CN201711217133 A CN 201711217133A CN 107834653 B CN107834653 B CN 107834653B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 54
- 239000003990 capacitor Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
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Abstract
The invention provides a battery control circuit of a mobile terminal and the mobile terminal, the battery control circuit of the mobile terminal comprises: the power supply management chip and the first voltage conversion circuit; the power management chip comprises a voltage input end and a first output end, and the first voltage conversion circuit is connected between the first output end of the power management chip and a battery of the mobile terminal; when the voltage input end of the power management chip is connected with external charging voltage, the power management chip controls the first voltage conversion circuit to be in a boosting working mode. Therefore, the embodiment of the invention improves the charging voltage of the battery of the mobile terminal, further improves the voltage of the battery and improves the capacity of the battery.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a battery control circuit of a mobile terminal and the mobile terminal.
Background
With the rapid development of mobile communication technology, the popularity of smart phones is higher and higher, and the continuous upgrade of mobile phone hardware and the increasing of new functions bring greater power consumption while bringing smoother experience to users. In this regard, various manufacturers have many ways to increase the capacity of the battery, such as increasing the volume of the battery. However, the portability of the mobile phone is sacrificed by increasing the volume of the battery and increasing the battery capacity. In addition, the technology of new battery materials is slowly developed, and the improvement of battery capacity is also inconvenient.
Therefore, the prior art cannot improve the battery capacity while ensuring the portability of the mobile terminal.
Disclosure of Invention
The embodiment of the invention provides a battery control circuit of a mobile terminal and the mobile terminal, which are used for solving the problem that the battery capacity cannot be improved while the carrying convenience of the mobile terminal is ensured in the prior art.
An embodiment of the present invention provides a battery control circuit of a mobile terminal, including:
the power supply management chip and the first voltage conversion circuit;
the power management chip comprises a voltage input end and a first output end, and the first voltage conversion circuit is connected between the first output end of the power management chip and a battery of the mobile terminal;
when the voltage input end of the power management chip is connected with external charging voltage, the power management chip controls the first voltage conversion circuit to be in a boosting working mode.
The embodiment of the invention also provides a mobile terminal which comprises the battery control circuit of the mobile terminal.
The embodiment of the invention has the beneficial effects that:
according to the embodiment of the invention, the first voltage conversion circuit is arranged between the first output end of the power management chip and the battery of the mobile terminal, and when the voltage input end of the power management chip is connected with external charging voltage, the first voltage conversion circuit is controlled to be in a boosting working mode through the power management chip, so that the charging voltage of the battery of the mobile terminal is increased, the voltage of the battery is further increased, and the capacity of the battery is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 shows a schematic circuit diagram of a battery control circuit of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a battery control circuit of a mobile terminal, as shown in fig. 1, the battery control circuit of the mobile terminal includes:
a power management chip 3 and a first voltage conversion circuit 1;
the power management chip 3 comprises a voltage input end 303 and a first output end 301, and the first voltage conversion circuit 1 is connected between the first output end 301 of the power management chip 3 and the battery 6 of the mobile terminal;
when the voltage input end 303 of the power management chip 3 is connected to an external charging voltage, the power management chip 3 controls the first voltage conversion circuit 1 to be in a boost working mode. For example, when the external charging voltage is 9V or 12V, the charging voltage output from the first voltage conversion circuit 1 to the battery terminal may reach 8V or more.
As can be seen from the above, in the embodiment of the present invention, the first voltage conversion circuit 1 is disposed between the first output terminal 301 of the power management chip 3 and the battery 6 of the mobile terminal, and when the voltage input terminal 303 of the power management chip 3 is connected to the external charging voltage, the power management chip 3 controls the first voltage conversion circuit 1 to be in the boost operating mode, so as to increase the charging voltage of the battery 6 of the mobile terminal, and further increase the voltage of the battery 6. The higher the voltage of the battery with the same volume is, the higher the energy contained in the battery is, so that the capacity of the battery can be improved without increasing the volume of the battery, and the problem that the capacity of the battery cannot be improved while the carrying convenience of the mobile terminal is ensured in the prior art is solved.
Preferably, the first voltage conversion circuit 1 includes: a first inductor L1 and a first capacitor C1;
one end of the first inductor L1 is electrically connected to the first output terminal 301, the other end of the first inductor L1 is electrically connected to one end of the battery 6 and one end of the first capacitor C1, respectively, and the other end of the first capacitor C1 is grounded;
when the voltage input end 303 is connected to an external charging voltage, the power management chip 3 controls the pulse duty ratio of the first output end 301 to be greater than a first preset value, so that the first inductor L1 and the first capacitor C1 are in a boost operating mode. Further, the first preset value may be 50%.
That is, when the pulse duty ratio of the first output terminal 301 of the power management chip 3 is greater than the first preset value, the time for the first inductor L1 and the first capacitor C1 to store the electric energy is greater than the time for releasing the electric energy, and the first voltage conversion circuit 1 formed by the first inductor L1 and the first capacitor C1 is in the boost operation mode.
Preferably, the battery control circuit of the mobile terminal according to the embodiment of the present invention further includes:
a second voltage conversion circuit 2;
the power management chip 3 further comprises a second output end 302, and the second voltage conversion circuit 2 is connected between the second output end 302 and a power supply end of an electric system 4 of the mobile terminal;
when the voltage input end 303 of the power management chip 3 is connected to an external charging voltage, the power management chip 3 controls the voltage output by the second voltage conversion circuit 2 to be within the working voltage range of the power consumption system 4.
That is, when the voltage input terminal 303 of the power management chip 3 is connected to the external charging voltage, one of the voltage signals is output from the first output terminal 301, and the charging voltage of the battery 6 of the mobile terminal is increased through the boosting effect of the first voltage conversion circuit 1, so that the voltage of the battery 6 is increased, and the capacity of the battery 6 is increased; the other path of voltage signal is output from the second output terminal 302, and is adjusted within the range of the working voltage of the power system 4 of the mobile terminal through the action of the second voltage conversion circuit 2.
Therefore, the battery control circuit of the mobile terminal according to the embodiment of the present invention can charge the battery 6 of the mobile terminal and provide a working voltage for the power system 4 of the mobile terminal when the external charging voltage is applied, so that the mobile terminal can normally work in the charging process of the battery.
Preferably, the battery control circuit of the mobile terminal according to the embodiment of the present invention further includes:
a changeover switch 5;
the switch 5 comprises a first terminal 501, a second terminal 502 and a control terminal 503;
the first end 501 is used for accessing an external charging voltage, the second end 502 is electrically connected with the battery 6, and the control end 503 is electrically connected with the voltage input end 303 of the power management chip 3;
when the first end 501 is connected to an external charging voltage, the first end 501 is electrically connected to the control end 503, and the second end 502 is disconnected from the control end 503;
when the first terminal 501 is disconnected from the external charging voltage, the first terminal 501 is disconnected from the control terminal 503, and the second terminal 502 is electrically connected to the control terminal 503.
When the first terminal 501 is electrically connected to the control terminal 503 and the second terminal 502 is disconnected from the control terminal 503, the external charging voltage connected to the first terminal 501 supplies power to the power consumption system 4 of the mobile terminal. In addition, since the second terminal 502 is electrically connected to the battery 6 of the mobile terminal, when the first terminal 501 is disconnected from the control terminal 503 and the second terminal 502 is electrically connected to the control terminal 503, the power system 4 of the mobile terminal can be supplied with power through the battery 6. Therefore, according to the embodiment of the present invention, the port providing the operating voltage can be automatically switched for the power consumption system 4 in the charging process and the non-charging process of the mobile terminal through the automatic switching of the switch 5, so that the mobile terminal can normally operate in both the charging process and the non-charging process of the battery 6.
Further, when the first terminal 501 is disconnected from the control terminal 503 and the second terminal 502 is electrically connected to the control terminal 503, the power management chip 3 is further configured to control the first output terminal 301 to be in an inactive state, detect the voltage of the battery 6, and adjust the operating mode of the second voltage conversion circuit 2 according to the detected voltage of the battery 6, so that the output voltage of the second voltage conversion circuit 2 is within the operating voltage range of the power consumption system 4.
When the first terminal 501 is disconnected from the control terminal 503 and the second terminal 502 is electrically connected to the control terminal 503, the battery 6 is used to provide a working voltage for the power consumption system 4 of the mobile terminal, and the battery 6 cannot be charged through the first output terminal 301 of the power management chip 3, so that the first output terminal 301 needs to be controlled to be in an inactive state, that is, the first output terminal 301 is controlled not to output an electrical signal. In addition, in the embodiment of the present invention, since the voltage of the battery 6 is increased, in the process that the battery 6 provides the operating voltage for the electric system 4, the voltage of the battery 6 has three stages, namely, an upper limit value higher than the operating voltage range of the electric system 4, an operating voltage range within the operating voltage range, and a lower limit value lower than the operating voltage range, and therefore, in the process, the voltage of the battery 6 needs to be detected in real time, and the operating mode of the second voltage conversion circuit 2 needs to be adjusted according to the voltage of the battery 6, so that the voltage output by the second voltage conversion circuit 2 can be within the operating voltage range of the electric system 4.
Specifically, when the first terminal 501 is disconnected from the control terminal 503 and the second terminal 502 is electrically connected to the control terminal 503, the power management chip 3 controls the second voltage conversion circuit 2 to be in the step-down operation mode when the voltage of the battery 6 is greater than the upper limit value of the operation voltage range of the power consumption system 4; under the condition that the voltage of the battery 6 is within the working voltage range of the electric system 4, the power management chip 3 controls the second voltage conversion circuit 2 to be in a through working mode; when the voltage of the battery 6 is smaller than the lower limit value of the operating voltage range of the power consumption system 4, the power management chip 3 controls the second voltage conversion circuit 2 to be in the boost operating mode.
Among other things, mobile terminals are typically configured to turn off when their batteries reach a predetermined minimum voltage, which may be higher than the minimum operating voltage of the batteries. For example, a lithium ion battery can be regarded as an empty battery when the battery voltage of the lithium ion battery reaches 3.0V, but the lowest operating voltage of some components of the mobile terminal is 3.45V. Thus, the battery may contain an unused capacity between 3.0V and 3.45V.
In addition, the unused battery capacity may depend on the load current, temperature, and life of the battery. In the case of warmed-up, light-duty fresh cells, the unused capacity is typically only a few percent of the total capacity. However, in the case of a cooled or worn battery, the unused capacity may increase significantly. For example, examples of the battery discharging at a given load (load of 0.5C) at different temperatures are shown in table 1. Among them, discharging a battery at 25 ℃ may result in only 2% of the remaining total capacity at a cutoff voltage of 3.4V, while discharging a battery at minus 20 ℃ may result in up to 30% of the remaining total capacity at the cutoff voltage. And the battery generally considers that the battery can not output the electric quantity already from 3.5V to 3.55V, and the working voltage of the internal device of the mobile terminal is above 3.6V, under the condition of minus 20 degrees, because the temperature is low, the impedance of the battery material is increased, the voltage output by the battery is only about 3.55V, and at this time, 35% of the battery electric quantity can not be output.
However, in the embodiment of the present invention, the power management chip 3 can control the first voltage conversion circuit 1 to operate in the boost mode at a low temperature, so as to boost the operating voltage provided by the battery 6 to the power system 4, so that when the voltage of the battery 6 is lower than the lower limit value of the operating voltage range of the power system 4, a part of the remaining power can still be output, and the effective utilization rate of the battery is further improved.
TABLE 1 percentage of charge of the battery at different temperatures
Further, the second voltage conversion circuit 2 includes: a second inductor L2 and a second capacitor C2;
one end of the second inductor L2 is electrically connected to the second output terminal 302, the other end of the second inductor L2 is electrically connected to the power supply terminal of the electric system 4 and one end of the second capacitor C2, respectively, and the other end of the second capacitor C2 is grounded;
when the first terminal 501 is disconnected from the control terminal 503 and the second terminal 502 is electrically connected to the control terminal 503, the power management chip 3 controls the pulse duty ratio of the second output terminal 302 to be smaller than a second preset value under the condition that the voltage of the battery 6 is greater than the upper limit value of the operating voltage range of the power consumption system 4, so that the second inductor L2 and the second capacitor C2 are in a step-down operating mode; under the condition that the voltage of the battery 6 is within the operating voltage range of the power utilization system 4, the power management chip 3 controls the pulse duty ratio of the second output end 302 to be equal to a second preset value, so that the second inductor L2 and the second capacitor C2 are in a through-mode of operation; when the voltage of the battery 6 is smaller than the lower limit of the operating voltage range of the power system 4, the power management chip 3 controls the pulse duty ratio of the second output terminal 302 to be larger than a second preset value, so that the second inductor L2 and the second capacitor C2 are in a boost operating mode. The second preset value may be 50%.
When the pulse duty ratio of the second output terminal 302 of the power management chip 3 is smaller than the second preset value, the time for the second inductor L2 and the second capacitor C2 to store the electric energy is shorter than the time for releasing the electric energy, and the second voltage conversion circuit 2 formed by the second inductor L2 and the second capacitor C2 is in the step-down mode.
When the pulse duty ratio of the second output terminal 302 of the power management chip 3 is equal to the second preset value, the time for which the second inductor L2 and the second capacitor C2 store electric energy is equal to the time for releasing electric energy, and the second voltage conversion circuit 2 formed by the second inductor L2 and the second capacitor C2 is in the through mode, that is, the second voltage conversion circuit 2 formed by the second inductor L2 and the second capacitor C2 does not change the voltage output from the second output terminal 302.
When the pulse duty ratio of the second output terminal 302 of the power management chip 3 is greater than the second preset value, the time for the second inductor L2 and the second capacitor C2 to store the electric energy is greater than the time for releasing the electric energy, and the second voltage conversion circuit 2 formed by the second inductor L2 and the second capacitor C2 is in the boost operating mode.
In addition, when the second voltage conversion circuit 2 is composed of the second inductor L2 and the second capacitor C2, when the voltage input end 303 of the power management chip 3 is connected to the external charging voltage, the power management chip 3 controls the pulse duty ratio of the second output end 302 to be smaller than a second preset value, and the second inductor L2 and the second capacitor C2 are in a step-down operation mode, so that the voltage output by the second voltage conversion circuit 2 composed of the second inductor L2 and the second capacitor C2 is within the operation voltage range of the power system 4.
The external charging voltage connected to the voltage input terminal 303 of the power management chip 3 is higher than the operating voltage of the power system 4 of the mobile terminal, so that the second voltage conversion circuit 2 is required to reduce the voltage when the operating voltage is provided to the power system 4 of the mobile terminal through the external charging voltage. When the pulse duty ratio of the second output terminal 302 of the power management chip 3 is smaller than the second preset value, and the time for storing the electric energy by the second inductor L2 and the second capacitor C2 is shorter than the time for releasing the electric energy, the second voltage conversion circuit 2 formed by the second inductor L2 and the second capacitor C2 is in the step-down mode, so as to reduce the external charging voltage within the working voltage range of the power consumption system 4.
In summary, the embodiments of the present invention can increase the battery capacity by increasing the voltage of the battery under the same battery volume, and can also increase the effective utilization rate of the battery capacity in the low-temperature working environment of the battery.
The embodiment of the invention also provides a mobile terminal, which comprises a battery 6 and the battery control circuit of the mobile terminal.
Furthermore, the battery control circuit of the mobile terminal is arranged inside the battery 6 of the mobile terminal, so that the arrangement space outside the battery 6 of the mobile terminal is saved, the whole volume of the mobile terminal is not increased, and the carrying convenience of the mobile terminal is further guaranteed.
Because the battery control circuit of the mobile terminal is arranged, the first voltage conversion circuit 1 is arranged between the first output end 301 of the power management chip 3 and the battery 6 of the mobile terminal, and when the voltage input end 303 of the power management chip 3 is connected with external charging voltage, the first voltage conversion circuit 1 is controlled to be in a boosting working mode through the power management chip 3, so that the charging voltage of the battery 6 of the mobile terminal is increased, and the voltage of the battery 6 is further increased. The higher the voltage of the battery with the same volume is, the higher the energy contained in the battery is, so that the capacity of the battery can be improved without increasing the volume of the battery, and the problem that the capacity of the battery cannot be improved while the carrying convenience of the mobile terminal is ensured in the prior art is solved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A battery control circuit of a mobile terminal, comprising:
the power supply management chip and the first voltage conversion circuit;
the power management chip comprises a voltage input end and a first output end, and the first voltage conversion circuit is connected between the first output end of the power management chip and a battery of the mobile terminal;
when the voltage input end of the power management chip is connected with external charging voltage, the power management chip controls the first voltage conversion circuit to be in a boosting working mode;
wherein, the battery control circuit still includes:
a second voltage conversion circuit;
the power management chip further comprises a second output end, and the second voltage conversion circuit is connected between the second output end and a power supply end of an electric system of the mobile terminal;
when the voltage input end of the power management chip is connected with external charging voltage, the power management chip controls the voltage output by the second voltage conversion circuit to be within the working voltage range of the power utilization system;
wherein, the battery control circuit still includes:
a switch;
the change-over switch comprises a first end, a second end and a control end;
the first end is used for accessing external charging voltage, the second end is electrically connected with the battery, and the control end is electrically connected with the voltage input end of the power management chip;
when the first end is connected with external charging voltage, the first end is electrically connected with the control end, and the second end is disconnected with the control end;
when the first end is disconnected with the external charging voltage, the first end is disconnected with the control end, and the second end is electrically connected with the control end;
further, when the first terminal is disconnected from the control terminal and the second terminal is electrically connected to the control terminal, the power management chip is further configured to control the first output terminal to be in an inactive state, detect the voltage of the battery, and adjust the operating mode of the second voltage conversion circuit according to the detected voltage of the battery, so that the output voltage of the second voltage conversion circuit is within the operating voltage range of the power consumption system.
2. The battery control circuit of the mobile terminal according to claim 1, wherein the first voltage conversion circuit comprises: a first inductor and a first capacitor;
one end of the first inductor is electrically connected with the first output end, the other end of the first inductor is electrically connected with the battery and one end of the first capacitor respectively, and the other end of the first capacitor is grounded;
when the voltage input end is connected with external charging voltage, the power management chip controls the pulse duty ratio of the first output end to be larger than a first preset value, so that the first inductor and the first capacitor are in a boosting working mode.
3. The battery control circuit of the mobile terminal according to claim 1,
when the first end is disconnected with the control end and the second end is electrically connected with the control end, the power management chip controls the second voltage conversion circuit to be in a voltage reduction working mode under the condition that the voltage of the battery is larger than the upper limit value of the working voltage range of the power utilization system; under the condition that the voltage of the battery is within the working voltage range of the power utilization system, the power management chip controls the second voltage conversion circuit to be in a through working mode; and under the condition that the voltage of the battery is smaller than the lower limit value of the working voltage range of the electric system, the power management chip controls the second voltage conversion circuit to be in a boosting working mode.
4. The battery control circuit of the mobile terminal according to claim 3, wherein the second voltage conversion circuit comprises: a second inductor and a second capacitor;
one end of the second inductor is electrically connected with the second output end, the other end of the second inductor is respectively electrically connected with a power supply end of the power utilization system and one end of the second capacitor, and the other end of the second capacitor is grounded;
when the first end is disconnected from the control end and the second end is electrically connected with the control end, and the voltage of the battery is larger than the upper limit value of the working voltage range of the power utilization system, the power management chip controls the pulse duty ratio of the second output end to be smaller than a second preset value, so that the second inductor and the second capacitor are in a voltage reduction working mode; under the condition that the voltage of the battery is within the working voltage range of the power utilization system, the power management chip controls the pulse duty ratio of the second output end to be equal to a second preset value, so that the second inductor and the second capacitor are in a direct-connection working mode; and under the condition that the voltage of the battery is smaller than the lower limit value of the working voltage range of the power utilization system, the power management chip controls the pulse duty ratio of the second output end to be larger than a second preset value, so that the second inductor and the second capacitor are in a boosting working mode.
5. The battery control circuit of claim 4, wherein when the voltage input terminal of the power management chip is connected to an external charging voltage, the power management chip controls a pulse duty ratio of the second output terminal to be smaller than a second preset value, and the second inductor and the second capacitor are in a step-down mode of operation, so that a voltage output by the second voltage conversion circuit formed by the second inductor and the second capacitor is within an operating voltage range of the power consumption system.
6. A mobile terminal comprising a battery, characterized in that it comprises a battery control circuit of a mobile terminal according to any of claims 1 to 5.
7. The mobile terminal of claim 6, wherein the battery control circuit of the mobile terminal is disposed within a battery of the mobile terminal.
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| CN102548154A (en) * | 2012-02-07 | 2012-07-04 | 黄克亚 | Control device for solar light-emitting diode (LED) lighting system |
| US20150340901A1 (en) * | 2014-05-26 | 2015-11-26 | Em Microelectronic-Marin S.A. | Electronic device including a very low voltage generator powering a battery |
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| CN202103760U (en) * | 2011-06-08 | 2012-01-04 | 天津三星光电子有限公司 | Digital camera capable of adjusting auxiliary focusing light brightness |
| CN104979873A (en) * | 2015-06-30 | 2015-10-14 | 单云峰 | Circuit structure integrated with battery charger and direct-current booster |
| CN106257812B (en) * | 2016-08-17 | 2018-05-22 | 浙江大学 | A kind of power management chip based on the COT control Buck circuits of two-phase containing flow equalizing function |
| CN107196405A (en) * | 2017-06-15 | 2017-09-22 | 上海诺仪表有限公司 | A kind of power switching apparatus and method and instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548154A (en) * | 2012-02-07 | 2012-07-04 | 黄克亚 | Control device for solar light-emitting diode (LED) lighting system |
| US20150340901A1 (en) * | 2014-05-26 | 2015-11-26 | Em Microelectronic-Marin S.A. | Electronic device including a very low voltage generator powering a battery |
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