CN214337577U - Power supply circuit of mobile terminal and mobile terminal - Google Patents
Power supply circuit of mobile terminal and mobile terminal Download PDFInfo
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- CN214337577U CN214337577U CN202022459280.6U CN202022459280U CN214337577U CN 214337577 U CN214337577 U CN 214337577U CN 202022459280 U CN202022459280 U CN 202022459280U CN 214337577 U CN214337577 U CN 214337577U
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Abstract
The utility model discloses a mobile terminal's supply circuit and mobile terminal, supply circuit includes: a first power supply path connected to a main battery of the mobile terminal; a second power supply path connected to the sub-battery of the mobile terminal; the detection circuit is connected with the first power supply path and the second power supply path, and when the detection circuit detects that the main battery is in place, the detection circuit conducts the first power supply path to utilize the main battery to supply power; when the detection circuit detects that the main battery is not in place, the second power supply path is conducted to supply power by using the auxiliary battery, so that the main battery is replaced. Therefore, the system can not be powered off when the battery is replaced, and data loss is avoided.
Description
Technical Field
The utility model relates to a mobile terminal technical field, concretely relates to mobile terminal's supply circuit and mobile terminal.
Background
In the existing scheme, if a standby battery of the mobile terminal is directly replaced, the problem of data loss is caused by the operation of power failure and shutdown of equipment; the device is charged continuously by the aid of the charger, the use is inconvenient, functions such as photographing and code scanning of the device during charging are affected, the weight of the device and the charger is heavy, single-hand operation is also laborious, and great inconvenience is brought to work and use; in addition, the equipment is in a charging use state for a long time, battery aging of the equipment is accelerated, the service life of the battery is shortened, and meanwhile, the heating problem caused during charging is accelerated, so that the aging of the battery is accelerated, and the use experience of consumers is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a mobile terminal's supply circuit and mobile terminal, it can guarantee to maintain the normal standby work of system when equipment change battery for the system can not cut off the power supply and shut down, thereby no longer takes place the problem that data lost.
For solving the above technical problem, the utility model provides a first technical scheme does: there is provided a power supply circuit of a mobile terminal, including: a first power supply path connected to a main battery of the mobile terminal; a second power supply path connected to the sub-battery of the mobile terminal; the detection circuit is connected with the first power supply path and the second power supply path, and when the detection circuit detects that the main battery is in place, the detection circuit conducts the first power supply path to utilize the main battery to supply power; when the detection circuit detects that the main battery is not in place, the second power supply path is conducted to supply power by using the auxiliary battery, so that the main battery is replaced.
The detection circuit is further connected with the main battery to receive the voltage of the main battery and detect whether the main battery is in place or not according to the received voltage of the main battery.
Wherein, the detection circuit includes: the reset circuit comprises a voltage port and a reset port, wherein the voltage port is connected with the main battery and the fixed power supply and is used for receiving the voltage of the main battery and the fixed voltage; when the voltage port receives a voltage larger than a first preset voltage, the reset port outputs a first level signal, and then the first power supply path is conducted to utilize the main battery for power supply; when the voltage port receives a voltage smaller than the first preset voltage, the reset port outputs a second level signal, and then the second power supply path is conducted to utilize the secondary battery for power supply.
Wherein, the detection circuit includes: the first switch comprises a control end, a first path end and a second path end, wherein the control end of the first switch is connected with the reset port, the first path end of the first switch is connected with the fixed power supply and the output end of the detection circuit, and the second path end of the first switch is grounded; when the reset port outputs the first level signal, the first switch is conducted, the output end of the detection circuit outputs the second level signal, and the first power supply path is conducted to utilize the main battery to supply power; when the reset port outputs the second level signal, the first switch is turned off, the output end of the detection circuit outputs the first level signal, and then the second power supply path is conducted to utilize the secondary battery for power supply.
Wherein the first power supply path includes: the second switch comprises a control end, a first path end and a second path end, wherein the control end of the second switch is connected with the output end of the detection circuit, and the second path end of the second switch is grounded; the control end of the third switch is connected with the first passage end of the second switch, and the second passage end of the third switch is grounded; the fourth switch comprises a control end, a first path end and a second path end, the control end of the fourth switch is connected with the first path end of the third switch, the first path end of the fourth switch is connected with the main battery, the second path end of the fourth switch is connected with the power supply controller and receives power supply voltage, and the control end of the fourth switch is connected with the second path end of the fourth switch.
Wherein, supply circuit still includes: a first charging circuit, the first charging circuit comprising: the charging interface is connected with an external power supply; and the fifth switch comprises a control end, a first path end and a second path end, the control end of the fifth switch is connected with the charging interface, the first path end of the fifth switch is connected with the control end of the fourth switch, and the second path end of the fifth switch is grounded.
Wherein the second power supply path includes: the sixth switch comprises a control end, a first path end and a second path end, wherein the control end of the sixth switch is connected with the output end of the detection circuit, and the second path end of the sixth switch is grounded; the control end of the seventh switch is connected with the first path end of the sixth switch, the first path end of the seventh switch is connected with the power supply controller and receives power supply voltage, and the second path end of the seventh switch is connected with the auxiliary battery; and the anode of the diode is connected with the auxiliary battery, and the cathode of the diode is connected with the second path end of the seventh switch.
Wherein, still include: the second charging circuit is connected with the main battery and the auxiliary battery; and the voltage detection circuit is connected with the secondary battery and the second charging circuit, and when the voltage detection circuit detects that the voltage of the secondary battery is lower than a second preset voltage, the second charging circuit charges the secondary battery by using the main battery.
The voltage detection circuit includes: a second detection circuit; the voltage division circuit comprises a first voltage division resistor and a second voltage division resistor, wherein the first end of the first voltage division resistor is connected with the auxiliary battery, the second end of the first voltage division resistor is connected with the first end of the second voltage division resistor, and the second end of the second voltage division resistor is grounded; the second detection circuit is connected with the second end of the first voltage-dividing resistor and the first end of the second voltage-dividing resistor; the second detection circuit detects the voltage of the second end of the first voltage-dividing resistor and the voltage of the first end of the second voltage-dividing resistor, and further detects whether the voltage of the auxiliary battery is lower than a second preset voltage or not; the second charging circuit includes: the booster circuit is connected with the main battery and the second detection circuit; the charging unit is connected with the booster circuit, the secondary battery and the second detection circuit; when the voltage of the auxiliary battery is lower than a second preset voltage, the booster circuit boosts the voltage of the main battery, and the charging unit is used for charging the auxiliary battery.
In order to solve the above technical problem, the utility model provides a second technical scheme does: there is provided a mobile terminal including: the battery cover comprises a main board and a detachable battery cover; wherein, the mainboard is provided with a power supply circuit and a sensor; the power supply circuit is any one of the power supply circuits; the battery cover is provided with a sensing piece, and when the sensing piece cannot be detected by the sensor, the mobile terminal is placed in a low power consumption mode.
The utility model has the advantages that the utility model is different from the prior art, the utility model detects whether the main battery is in position through the detection circuit, and when the main battery is detected to be in position, the first power supply path is conducted to utilize the main battery to supply power; when the main battery is detected to be out of position, the second power supply path is conducted to utilize the auxiliary battery to supply power, so that the main battery is replaced. Therefore, the system can not be powered off when the battery is replaced, and data loss is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a functional block diagram of a power supply circuit of a mobile terminal according to a first embodiment of the present invention;
fig. 2 is a functional block diagram of a power supply circuit of a mobile terminal according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a specific circuit structure of the detection circuit;
FIG. 4 is a schematic diagram of a specific circuit structure of the first charging circuit and the first power supply path;
FIG. 5 is a schematic diagram of a specific circuit structure of the second power supply path;
fig. 6 is a functional block diagram of a power supply circuit of a mobile terminal according to a third embodiment of the present invention;
FIG. 7 is a schematic diagram of a specific circuit structure of the second charging circuit and the voltage detection circuit;
fig. 8 is a schematic structural diagram of an embodiment of the mobile terminal of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Please refer to fig. 1, which is a schematic diagram of functional modules of a power supply circuit of a mobile terminal according to a first embodiment of the present invention. Wherein, power supply circuit includes: a first power supply path 11, a second power supply path 13 and a detection circuit 15. Specifically, the first power supply path 11 is connected to the main battery 12 of the mobile terminal, the second power supply path 13 is connected to the sub-battery 14 of the mobile terminal, and the detection circuit 15 is connected to the first power supply path 11 and the second power supply path 13. When the detecting circuit 15 detects that the main battery 12 is in place, the first power supply path 11 is conducted to supply power by using the main battery 12; when the detection circuit 15 detects that the main battery 12 is not in place, the second power supply path 13 is conducted to supply power by the sub-battery 14, so as to replace the main battery 12. Therefore, the mobile terminal can be ensured not to be powered off when the main battery 12 is replaced, and data loss is avoided.
In one embodiment, the detection circuit 15 is further connected to the main battery 12 to receive the voltage of the main battery 12 and detect whether the main battery 12 is in place according to the received voltage of the main battery 12. Specifically, if the detection circuit 15 receives a voltage greater than a first predetermined voltage, the main battery 12 is in position, and it can be understood that the voltage received by the detection circuit 15 is the voltage of the main battery 12, which is greater than the first predetermined voltage. When the detection circuit 15 receives a voltage smaller than the first predetermined voltage, the main battery 12 is not in place.
Please refer to fig. 2, which is a schematic diagram of a functional module of a power supply circuit of a mobile terminal according to a second embodiment of the present invention. Compared with the first embodiment shown in fig. 1, the difference is that in this embodiment, the method further includes: a first charging circuit 18 and a power supply controller 17, the first charging circuit 18 being used to charge the main battery 12 by an external power supply.
Specifically, referring to fig. 3, fig. 3 is a schematic circuit structure diagram of the detection circuit 15. The detection circuit 15 includes: the reset circuit 151, in one embodiment, the reset circuit 151 may be a chip. Specifically, the reset circuit 151 includes a voltage port P1 and a reset port P2, wherein the voltage port P1 is connected to the MAIN battery 12 and the fixed power source 16 for receiving the voltage VBAT _ MAIN and the fixed voltage VIO of the MAIN battery 12. Specifically, when the voltage port P1 receives a voltage greater than a first predetermined voltage, the reset port P2 outputs a first level signal, so as to turn on the first power supply path 11 to supply power by the main battery 12. It is understood that, at this time, the voltage received by the voltage port P1 is the voltage VBAT _ MAIN of the MAIN battery 12. When the voltage port P1 receives a voltage smaller than the first predetermined voltage, the reset port P2 outputs a second level signal, so as to turn on the second power supply path 13 to supply power by the sub-battery 14. It will be appreciated that, at this time, the voltage received at the voltage port P1 is the fixed voltage VIO of the fixed power supply 16. As shown in fig. 3, the voltage port P1 is connected to the fixed power source 16 through a first resistor R1 and a diode D, specifically, a first end of the first resistor R1 is connected to the voltage port P1, a second end of the first resistor R1 is connected to a cathode of the diode D, and an anode of the diode D is connected to the fixed power source 16. The diode D is used to prevent voltage from flowing backward.
Specifically, in an embodiment, the reset circuit 151 is taken as an example of a chip, the first preset voltage is a threshold voltage of the reset circuit 151, when a voltage received at the voltage port P1 exceeds the threshold voltage of the reset circuit 151, for example, 2.3V, it indicates that the main battery 12 is in place, and when a voltage received at the voltage port P1 is lower than the threshold voltage of the reset circuit 151, for example, 1.8V, it indicates that the main battery 12 is not in place. Specifically, the fixed power supply 16 is a normally open power supply with a voltage of 1.8V.
Further, the detection circuit 15 further includes: the first switch Q1 includes a control terminal, a first path terminal and a second path terminal, the control terminal of the first switch Q1 is connected to the reset port P2, the first path terminal of the first switch Q1 is connected to the fixed power source 16 and the output terminal m of the detection circuit 15, and the second path terminal of the first switch Q1 is grounded. In one embodiment, the first switch Q1 is an NPN transistor, wherein the control terminal corresponds to the base of the first switch Q1, the first path terminal corresponds to the collector of the first switch Q1, and the second path terminal corresponds to the emitter of the first switch Q1. When the reset port P2 outputs the first level signal, the first switch Q1 is turned on, the output end m of the detection circuit 15 outputs the enable signal BACK _ EINT, and the enable signal BACK _ EINT is the second level signal, so as to turn on the first power supply path 11 to supply power by using the voltage VBAT _ MAIN of the MAIN battery 12. When the reset port P2 outputs the second level signal, the first switch Q1 is turned off, the output end m of the detection circuit 15 outputs the enable signal BACK _ EINT, and the enable signal BACK _ EINT is the first level signal, so as to turn on the second power supply path 13 to supply power by using the sub-battery 14. Specifically, the first level signal is a high level signal, and the second level signal is a low level signal. That is, when the reset port P2 outputs a high level signal, the first switch Q1 is turned on, the output end m of the detection circuit 15 outputs an enable signal BACK _ EINT of a low level signal, and the first power supply path 11 is controlled to be turned on to supply power by the main battery 12; when the reset port P2 outputs a low level signal, the first switch Q1 is turned off, the output terminal m of the detection circuit 15 outputs an enable signal BACK _ EINT of a high level signal, and the first power supply path 11 is controlled to be turned off to supply power by the sub-battery 14.
Referring to fig. 3, further, the reset circuit 151 further includes a port P3, and the port P3 is grounded. The detection circuit 15 further includes: a second resistor R2, a third resistor R3, and a fourth resistor R4. The first end of the second resistor R2 is connected to the reset port P2, and the second end of the second resistor R2 is grounded. A first terminal of the third resistor R3 is connected to the reset port P2, and a second terminal of the third resistor R3 is connected to a control terminal of the first switch Q1. A first end of the fourth resistor R4 is connected to the fixed power source 16, and a second end of the fourth resistor R4 is connected to the first path end of the first switch Q1 and the output end m of the detection circuit 15.
Referring to fig. 4, fig. 4 is a schematic circuit diagram of the first charging circuit 18 and the first power supply path 11. The first charging circuit 18 includes: and a charging interface 181 connected to an external power source and configured to be charged by the external power source. The first charging circuit 18 further includes a fifth switch Q5 including a control terminal, a first path terminal and a second path terminal, the control terminal of the fifth switch Q5 is connected to the charging interface 181, the first path terminal of the fifth switch Q5 is connected to the control terminal of the fourth switch Q4, and the second path terminal of the fifth switch Q5 is grounded. Specifically, when the electric quantity of the main battery 12 is low, the charging interface 181 is connected to the external power source, the charging voltage VBUS is acquired, and the fifth switch Q5 is turned on at this time, so that the fourth switch Q4 is turned on, and the main battery 12 is charged through the external power source.
As shown in fig. 4, the first charging circuit 18 further includes: a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11. A first end of the ninth resistor R9 is connected with a control end of the fifth switch Q5; a first end of the tenth resistor R10 is connected to the second end of the ninth resistor R9, and a second end of the tenth resistor R10 is grounded; a first end of the eleventh resistor R11 is connected to a first end of the tenth resistor R10, and a second end of the eleventh resistor R11 is connected to the charging interface 181.
Referring to fig. 4, in detail, the first power supply path 11 includes: a second switch Q2, a third switch Q3, and a fourth switch Q4. The second switch Q2 includes a control terminal, a first path terminal and a second path terminal, the control terminal of the second switch Q2 is connected to the output terminal m of the detection circuit 15 for receiving the enable signal BACK _ EINT, and the second path terminal of the second switch Q2 is grounded. The third switch Q3 includes a control terminal, a first path terminal, and a second path terminal, the control terminal of the third switch Q3 is connected to the first path terminal of the second switch Q2, and the second path terminal of the third switch Q3 is connected to ground. The fourth switch Q4 includes a control terminal, a first path terminal and a second path terminal, the control terminal of the fourth switch Q4 is connected to the first path terminal of the third switch Q3, the first path terminal of the fourth switch Q4 is connected to the main battery 12, the second path terminal of the fourth switch Q4 is connected to the power controller 17, the power supply voltage VRAT is received, and the control terminal of the fourth switch Q4 is connected to the second path terminal of the fourth switch Q4.
The second switch Q2 and the third switch Q3 are NPN transistors, wherein the first end of the first path corresponds to a collector, the second end of the second path corresponds to an emitter, and the control end corresponds to a base. The fourth switch Q4 is a P-type MOS transistor.
Specifically, when the main battery 12 is in place, the enable signal BACK _ EINT output by the output terminal m of the detection circuit 15 is a low level signal, at this time, the second switch Q2 is turned off, and the base connection power controller 17 of the third switch Q3 receives the power supply voltage VRAT, so that the third switch Q3 is turned on, and the fourth switch Q4 is turned on, so that the main battery 12 supplies power to the system. When the main battery 12 is not in position, the enable signal BACK _ EINT output by the output terminal m of the detection circuit 15 is a high level signal, and at this time, the second switch Q2 is turned on, so that the base of the third switch Q3 is turned off by a low level signal, and the fourth switch Q4 is turned off, thereby effectively preventing the problem that the main battery 12 is short-circuited to cause the dragging of the auxiliary battery to cause the system power failure.
As shown in fig. 4, further, the first power supply path 11 further includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8. A first end of the fifth resistor R5 is connected to the detection circuit 15, and a second end is connected to the control end of the second switch Q2; a first end of the sixth resistor R6 is connected to the power controller 17, and a second end is connected to a first path end of the second switch Q2; a first end of the seventh resistor R7 is connected to the first path end of the second switch Q2, and a second end is connected to the control end of the third switch Q3; the eighth resistor R8 has a first terminal connected to the power controller 17 and a second terminal connected to the first path terminal of the third switch.
Referring to fig. 5, fig. 5 is a specific circuit diagram of the second power supply path 13, and the second power supply path 13 includes: a sixth switch Q6 and a seventh switch Q7, wherein the sixth switch Q6 includes a control terminal, a first path terminal and a second path terminal, the control terminal of the sixth switch Q6 is connected to the output terminal m of the detection circuit 15, and the second path terminal of the sixth switch Q6 is grounded. The seventh switch Q7 includes a control terminal, a first path terminal and a second path terminal, the control terminal of the seventh switch Q7 is connected to the first path terminal of the sixth switch Q6, the first path terminal of the seventh switch Q7 is connected to the power controller 17, which receives the supply voltage VBAT, and the second path terminal of the seventh switch Q7 is connected to the sub-battery 14.
The second power supply path 13 further includes: the anode of the diode D1 is connected to the sub-battery 14, and the cathode thereof is connected to the second path terminal of the seventh switch Q7. The sixth switch Q6 is an NPN transistor, and the seventh switch Q7 is a P-type MOS transistor.
When the main battery 12 is in place, the enable signal BACK _ EINT output by the output terminal m of the detection circuit 15 is a low level signal, the sixth switch Q6 is turned off, and the seventh switch Q7 is turned off, so that the sub-battery 14 is in a completely off state. When the main battery 12 is not in place, the enable signal BACK _ EINT output by the output terminal m of the detection circuit 15 is a high level signal, the sixth switch Q6 is turned on, the seventh switch Q7 is turned on, and the sub-battery 14 provides the voltage VBAT _ BACK to supply power to the system, so that the sub-battery 14 supplies power to the system without the main battery 12, and the standby state is maintained.
Further, the second power supply path 13 further includes: a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a first capacitor C1, a second capacitor C2 and a diode D1. A first end of the twelfth resistor R12 is connected to the detection circuit 15, and a second end is grounded; a first end of the thirteenth resistor R13 is connected to the control end of the sixth switch Q6, and a second end is connected to the detection circuit 15; a first end of the fourteenth resistor R14 is connected to the sub-battery 14 and the power controller 17, and a second end is connected to a first path end of the sixth switch Q6; a first end of the first capacitor C1 is connected with the auxiliary battery 14, and a second end is grounded; a first end of the second capacitor C2 is connected with the power controller 17, and a second end is grounded; the diode D1 has an anode connected to the sub-battery 14 and a cathode connected to a first end of the fourteenth resistor R14. Wherein the diode D1 is used to prevent the main battery voltage from directly flowing back to the sub-battery to charge the sub-battery.
Please refer to fig. 6, which is a schematic diagram of a functional module of a third embodiment of a power supply circuit of a mobile terminal according to the present invention, compared with the second embodiment shown in fig. 2, the difference is that the present embodiment further includes: a second charging circuit 19 and a voltage detection circuit 20, wherein the second charging circuit 19 is connected with the main battery 12 and the auxiliary battery 14. The voltage detection circuit 20 is connected to the sub-battery 14 and the second charging circuit 19, and when the voltage detection circuit 20 detects that the voltage of the sub-battery 14 is lower than a second preset voltage, the second charging circuit 19 charges the sub-battery by using the main battery. Specifically, when the voltage detection circuit 19 detects that the voltage of the sub-battery 14 is lower than the second preset voltage, the voltage detection circuit 20 outputs an enable signal to enable the second charging circuit 19 to charge the sub-battery 14 with the voltage of the main battery 12.
Specifically, referring to fig. 7, the voltage detection circuit 20 includes: a second detection circuit 201 and a voltage divider circuit 202. Specifically, the second detection circuit 201 includes a detection chip and a seventeenth resistor R17, a first end of the seventeenth resistor R17 is connected to the detection chip, and a second end of the seventeenth resistor R17 is connected to the voltage divider circuit 202. The voltage dividing circuit 202 comprises a first voltage dividing resistor R15 and a second voltage dividing resistor R16, wherein a first end of the first voltage dividing resistor R15 is connected with the sub-battery 14, a second end of the first voltage dividing resistor R15 is connected with a first end of the second voltage dividing resistor R16, and a second end of the second voltage dividing resistor R16 is grounded; the second detection circuit 201 is connected to the second terminal of the first voltage-dividing resistor R15 and the first terminal of the second voltage-dividing resistor R16. The second detection circuit 201 detects the voltage of the second terminal of the first voltage-dividing resistor R15 and the voltage of the first terminal of the second voltage-dividing resistor R16 through the detection port ADC, and further detects whether the voltage of the sub-battery 14 is lower than a second predetermined voltage. Specifically, the enable signal EM is output to the voltage boost circuit 191 and the charging unit 192 when it is detected that the voltage of the sub-battery 14 is lower than the second preset voltage.
The second charging circuit 19 includes: a booster circuit 191, and a charging unit 192. The booster circuit 191 is connected to the main battery 12; the charging unit 192 is connected to the voltage boosting circuit 191, the sub-battery 14 and the second detecting circuit 201; specifically, when the voltage of the sub-battery 14 is lower than the second preset voltage, that is, when the voltage boost circuit 191 receives the enable signal EM, the voltage boost circuit 191 boosts the voltage VBAT _ MAIN of the MAIN battery 12, and charges the sub-battery 14 by using the charging unit 192, so as to ensure that the voltage of the sub-battery 14 is always stable, and increase the service life of the sub-battery. Specifically, in one embodiment, if it is detected that the voltage of the sub-battery 14 is lower than 4V, the sub-battery 14 may be charged so that the voltage of the sub-battery 14 is continuously maintained at about 4V.
Specifically, the charging unit 192 includes: the charging chip comprises a first port N1, a second port N2 and a third port N3, wherein the first port N1 is connected with the booster circuit, the second port N2 is connected with the booster circuit and the detecting chip, and the third port N3 is connected with the secondary battery 14. Further, the charging unit 192 further includes: an eighteenth resistor R18, a third capacitor C3 and a fourth capacitor C4. The first end of the eighteenth resistor R18 is connected with the second port N2 of the booster circuit pole, and the second end of the eighteenth resistor R18 is grounded; the first end of the third capacitor C3 is connected with the third port N3, and the second end is grounded; the first end of the fourth capacitor C4 is connected to the first port N1, and the second end is grounded.
The utility model provides a power supply circuit, it can realize being supplied power by the auxiliary battery at the in-process of changing the battery to this can realize that the system can not cut off the power supply and shut down when changing the battery, thereby avoids data loss.
Please refer to fig. 8, which is a schematic structural diagram of an embodiment of the mobile terminal of the present invention, including: a main board 81 and a detachable battery cover 82. Wherein, the motherboard 81 is provided with a power supply circuit 811 and a sensor 812; the power supply circuit 811 is the power supply circuit 811 of any one of the embodiments of fig. 1 to 7; the battery cover 82 is provided with a sensing member 821, and in one embodiment, when the battery cover 82 is assembled on the main board 81, the sensing member 821 corresponds to the sensor 812 in position, and when the sensor 812 cannot detect the sensing member 821, the mobile terminal is placed in a low power consumption mode.
Specifically, since the capacity of the secondary battery is small and the discharge current is also small, the system needs to be in a standby mode with low power consumption in the time of supplying power by the secondary battery, so as to prevent the secondary battery from being shut down due to the voltage reduction protection caused by the excessive current, and increase the endurance time of the secondary battery. In an embodiment, the sensor 812 may be a hall sensor, and the sensing element 821 on the corresponding battery cover 82 may be a magnet, when the main battery needs to be replaced, the battery cover 82 must be removed, so the hall sensor on the main board 81 cannot receive the magnetic field of the magnet, the state of the output pin changes (the low level changes to the high level) and notifies the main control chip, and the main control chip receives the state change and then the system quickly enters a standby sleep mode to reduce the power consumption of the system, and any operation cannot wake up the system, so that the sub-battery is in a low current state when supplying power; when the main battery is replaced and the battery cover 82 is closed again after the main battery is in place, the hall sensor receives the magnetic field of the magnet again, the state of the output pin of the hall sensor changes again (the high level is changed into the low level) and informs the main control chip, the operation of the awakening system is allowed to take effect, and the device can be used normally again.
The utility model provides a mobile terminal, it can realize being supplied power by the auxiliary battery at the in-process of changing the battery to this can realize that the system can not cut off the power supply and shut down when changing the battery, thereby avoids data loss.
The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A power supply circuit for a mobile terminal, comprising:
a first power supply path connected to a main battery of the mobile terminal;
a second power supply path connected to a sub-battery of the mobile terminal;
the detection circuit is connected with the first power supply path and the second power supply path, and when the detection circuit detects that the main battery is in place, the detection circuit conducts the first power supply path to utilize the main battery to supply power; and when the detection circuit detects that the main battery is not in place, the second power supply path is conducted to supply power by using the auxiliary battery, so that the main battery is replaced.
2. The power supply circuit according to claim 1, wherein the detection circuit is further connected to the main battery to receive a voltage of the main battery and detect whether the main battery is in place according to the received voltage of the main battery.
3. The power supply circuit of claim 2, wherein the detection circuit comprises:
the reset circuit comprises a voltage port and a reset port, wherein the voltage port is connected with the main battery and the fixed power supply and is used for receiving the voltage of the main battery and the fixed voltage;
when the voltage port receives a voltage larger than a first preset voltage, the reset port outputs a first level signal, and then the first power supply path is conducted to supply power by using the main battery;
when the voltage port receives a voltage smaller than the first preset voltage, the reset port outputs a second level signal, and the second power supply path is conducted to supply power by using the auxiliary battery.
4. The power supply circuit of claim 3, wherein the detection circuit comprises:
the first switch comprises a control end, a first path end and a second path end, the control end of the first switch is connected with the reset port, the first path end of the first switch is connected with the fixed power supply and the output end of the detection circuit, and the second path end of the first switch is grounded;
when the reset port outputs a first level signal, the first switch is turned on, the output end of the detection circuit outputs a second level signal, and the first power supply path is further turned on to supply power by using the main battery;
when the reset port outputs the second level signal, the first switch is turned off, the output end of the detection circuit outputs the first level signal, and the second power supply path is conducted to supply power by using the auxiliary battery.
5. The power supply circuit of claim 4, wherein the first power supply path comprises:
the second switch comprises a control end, a first path end and a second path end, wherein the control end of the second switch is connected with the output end of the detection circuit, and the second path end of the second switch is grounded;
the control end of the third switch is connected with the first path end of the second switch, and the second path end of the third switch is grounded;
the fourth switch comprises a control end, a first path end and a second path end, the control end of the fourth switch is connected with the first path end of the third switch, the first path end of the fourth switch is connected with the main battery, the second path end of the fourth switch is connected with the power controller, the power controller receives power voltage, and the control end of the fourth switch is connected with the second path end of the fourth switch.
6. The power supply circuit of claim 5, further comprising: a first charging circuit for charging the first capacitor with a first voltage,
the first charging circuit includes: the charging interface is connected with an external power supply;
the fifth switch comprises a control end, a first path end and a second path end, the control end of the fifth switch is connected with the charging interface, the first path end of the fifth switch is connected with the control end of the fourth switch, and the second path end of the fifth switch is grounded.
7. The power supply circuit of claim 4, wherein the second power supply path comprises:
the sixth switch comprises a control end, a first path end and a second path end, wherein the control end of the sixth switch is connected with the output end of the detection circuit, and the second path end of the sixth switch is grounded;
a seventh switch, including a control end, a first path end and a second path end, wherein the control end of the seventh switch is connected to the first path end of the sixth switch, the first path end of the seventh switch is connected to a power supply controller for receiving a power supply voltage, and the second path end of the seventh switch is connected to the secondary battery;
and a diode having an anode connected to the sub-battery and a cathode connected to the second path terminal of the seventh switch.
8. The power supply circuit of claim 1, further comprising: a second charging circuit connected to the main battery and the sub-battery;
and the voltage detection circuit is connected with the secondary battery and the second charging circuit, and when the voltage detection circuit detects that the voltage of the secondary battery is lower than a second preset voltage, the second charging circuit charges the secondary battery by using the main battery.
9. The power supply circuit of claim 8, wherein the voltage detection circuit comprises:
a second detection circuit;
a voltage dividing circuit including a first voltage dividing resistor and a second voltage dividing resistor, wherein a first end of the first voltage dividing resistor is connected to the sub-battery, a second end of the first voltage dividing resistor is connected to a first end of the second voltage dividing resistor, and a second end of the second voltage dividing resistor is grounded; the second detection circuit is connected with the second end of the first voltage-dividing resistor and the first end of the second voltage-dividing resistor;
the second detection circuit detects voltages of a second end of the first voltage-dividing resistor and a first end of the second voltage-dividing resistor, and further detects whether the voltage of the secondary battery is lower than a second preset voltage;
the second charging circuit includes:
a voltage boost circuit connected to the main battery and the second detection circuit;
the charging unit is connected with the booster circuit, the secondary battery and the second detection circuit;
when the voltage of the auxiliary battery is lower than a second preset voltage, the booster circuit boosts the voltage of the main battery, and the charging unit is used for charging the auxiliary battery.
10. A mobile terminal, comprising: the battery cover comprises a main board and a detachable battery cover;
wherein, a power supply circuit and a sensor are arranged on the mainboard; the power supply circuit is the power supply circuit of any one of the claims 1 to 9;
the battery cover is provided with a sensing piece, and when the sensing piece cannot be detected by the sensor, the mobile terminal is placed in a low power consumption mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022459280.6U CN214337577U (en) | 2020-10-28 | 2020-10-28 | Power supply circuit of mobile terminal and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022459280.6U CN214337577U (en) | 2020-10-28 | 2020-10-28 | Power supply circuit of mobile terminal and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214337577U true CN214337577U (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022459280.6U Active CN214337577U (en) | 2020-10-28 | 2020-10-28 | Power supply circuit of mobile terminal and mobile terminal |
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| Country | Link |
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| CN (1) | CN214337577U (en) |
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