CN206962484U - A kind of power supply circuit and mobile terminal - Google Patents
A kind of power supply circuit and mobile terminal Download PDFInfo
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Abstract
The utility model, which provides a kind of power supply circuit and mobile terminal, the power supply circuit, to be included：Power supply sub-circuit, detection sub-circuit, the first controller, first switch pipe and battery；The power output end of power supply sub-circuit is connected with system load；The test side of detection sub-circuit is connected with power output end, the output end of detection sub-circuit is connected with the input of the first controller, test side is used for the voltage change ratio for detecting power output end, if voltage change ratio is less than predetermined threshold value, the first control signal is sent to the first controller；The output end of first controller is connected with the control terminal of first switch pipe, if the first controller is used to receive the first control signal, is controlled and is switched to off-state by conducting state between the first end of first switch pipe and the second end；The first end of first switch pipe is connected with power output end, and the second end of first switch pipe is connected with battery.So first switch pipe disconnects, and battery not only will not charge but also discharge, and reduce the loss to battery life.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a power supply circuit and mobile terminal.
Background
With the rapid development of mobile terminals, mobile terminals have become an essential tool in people's lives, and great convenience is brought to various aspects of users. The user may use the mobile terminal while the mobile terminal is charging, e.g., playing some songs or chatting using social software, etc. At the moment, the battery supplies power to the system in the charging process, so that the battery is charged and discharged, and the loss of the service life of the battery is large.
Therefore, in the prior art, the mobile terminal has the problem of large battery life loss in the charging process.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a supply circuit and mobile terminal to solve the great problem of mobile terminal battery life loss ratio.
In a first aspect, an embodiment of the present invention provides a power supply circuit, which is applied to a mobile terminal, and is used for supplying power to a system load, including: the power supply sub-circuit, the detection sub-circuit, the first controller, the first switch tube and the battery; wherein,
the power supply output end of the power supply sub-circuit is connected with the system load;
the detection end of the detection sub-circuit is connected with the power supply output end, the output end of the detection sub-circuit is connected with the input end of the first controller, the detection end is used for detecting the voltage change rate of the power supply output end, and if the voltage change rate is smaller than a preset threshold value, a first control signal is sent to the first controller;
the output end of the first controller is connected with the control end of the first switch tube, and the first controller is used for controlling the first end and the second end of the first switch tube to be switched from a conducting state to a disconnecting state if the first controller receives the first control signal;
the first end of the first switch tube is connected with the power output end, and the second end of the first switch tube is connected with the battery.
In a second aspect, the embodiment of the present invention further provides a mobile terminal, including the above power supply circuit.
Therefore, the utility model discloses supply circuit is applied to mobile terminal for to system load power supply, include: the power supply sub-circuit, the detection sub-circuit, the first controller, the first switch tube and the battery; wherein a power output terminal of the power supply sub-circuit is connected with the system load; the detection end of the detection sub-circuit is connected with the power supply output end, the output end of the detection sub-circuit is connected with the input end of the first controller, the detection end is used for detecting the voltage change rate of the power supply output end, and if the voltage change rate is smaller than a preset threshold value, a first control signal is sent to the first controller; the output end of the first controller is connected with the control end of the first switch tube, and the first controller is used for controlling the first end and the second end of the first switch tube to be switched from a conducting state to a disconnecting state if the first controller receives the first control signal; the first end of the first switch tube is connected with the power output end, and the second end of the first switch tube is connected with the battery. When the detected voltage change rate is smaller than the preset threshold value, the first end and the second end of the first switching tube are controlled to be disconnected, so that the battery cannot be charged or discharged, and the loss of the service life of the battery is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power supply circuit according to another embodiment of the present invention;
fig. 3 is a second schematic structural diagram of a power supply circuit according to another embodiment of the present invention;
fig. 4 is a third schematic structural diagram of a power supply circuit according to another embodiment of the present invention;
fig. 5 is a fourth schematic structural diagram of a power supply circuit according to another embodiment of the present invention;
fig. 6 is a fifth schematic structural diagram of a power supply circuit according to another embodiment of the present invention;
fig. 7 is a sixth schematic structural diagram of a power supply circuit according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power supply circuit provided in an embodiment of the present invention, and as shown in fig. 1, the power supply circuit 100 includes: a power supply sub-circuit 101, a detection sub-circuit 102, a first controller 103, a first switch tube 104 and a battery 105; wherein,
the power supply output end of the power supply sub-circuit 101 is connected with a system load 106;
the detection end of the detection sub-circuit 102 is connected to the power output end, the output end of the detection sub-circuit 102 is connected to the input end of the first controller, the detection end is used for detecting the voltage change rate of the power output end, and if the voltage change rate is smaller than a preset threshold value, a first control signal is sent to the first controller 103;
the output end of the first controller 103 is connected to the control end of the first switch tube 104, and the first controller 103 is configured to control the first end and the second end of the first switch tube 104 to be switched from the on state to the off state if the first controller receives the first control signal;
a first end of the first switch tube 104 is connected to the power output end, and a second end of the first switch tube 104 is connected to the battery 105.
In the embodiment of the present invention, the power output end of the power supply sub-circuit 101 is connected to the system load 106, and supplies power to the system load 106. The system load 106 may be a display device of the mobile terminal, an audio device of the mobile terminal, or the like. The detection terminal of the detection sub-circuit 102 is connected to the power output terminal, and can detect the voltage change rate output by the power sub-circuit 101. The voltage change rate is detected by collecting two voltages within a short time and obtaining the voltage change rate by subtracting the two voltages. For example, if the voltage detected at time t1 is V1 and the voltage detected at time t2 is V2, the voltage change rate is obtained by subtracting V1 from V2. The predetermined threshold may be 1 volt, 1.5 volts, 2 volts, or any user-defined value.
In the embodiment of the present invention, the first switch tube 104 may be a MOS tube, or a combination tube formed by combining a plurality of MOS tubes and having on and off functions. When receiving the first control signal, the first controller 103 controls the first end and the second end of the first switch tube 104 to be switched from the on state to the off state, and the second end of the first switch tube 104 is connected to the battery 105, so that the battery does not supply power to the system load 106, the power supply sub-circuit 101 cannot supply power to the battery 105, and the battery 105 cannot be charged or discharged, thereby protecting the battery 105 and reducing the life loss of the battery 105.
Optionally, the detection end of the detection sub-circuit 102 is further configured to send a second control signal to the first controller 103 if it is detected that the voltage change rate is greater than or equal to the preset threshold;
the first controller 103 is configured to control the first end and the second end of the first switch tube 104 to be switched from the off state to the on state if receiving the second control signal.
In the embodiment of the present invention, when the detection end of the detection sub-circuit 102 detects that the voltage change rate is greater than or equal to the preset threshold, the second control signal is sent to the first controller 103 to control the first end and the second end of the first switch tube 104 to switch to the on state from the off state. Like this, when there is great voltage change rate, switch on between the first end of first switch tube 104 and the second end, battery 105 can supply power for system load 106, has a great electric capacity in battery 105 generally, can provide the heavy current in the twinkling of an eye, can guarantee the stability of system load 106 voltage like this, makes the input ripple can not be on the large side, and the water ripple just can not appear in mobile terminal's screen, makes the user have better experience.
In an embodiment of the present invention, the Mobile terminal may be a Mobile phone, a Tablet personal Computer (Tablet personal Computer), a Laptop Computer (Laptop Computer), a personal digital assistant (personal digital assistant, PDA for short), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device).
The utility model discloses supply circuit is applied to mobile terminal for to system load 106 power supply, include: a power supply sub-circuit 101, a detection sub-circuit 102, a first controller 103, a first switch tube 104 and a battery 105; wherein, the power supply output terminal of the power supply sub-circuit 101 is connected to the system load 106; a detection end of the detection sub-circuit 102 is connected to the power output end, an output end of the detection sub-circuit 102 is connected to an input end of the first controller 103, the detection end is configured to detect a voltage change rate of the power output end, and if the voltage change rate is smaller than a preset threshold, send a first control signal to the first controller 103; the output end of the first controller 103 is connected to the control end of the first switch tube 104, and the first controller 103 is configured to control the first end and the second end of the first switch tube 104 to be switched from the on state to the off state if the first controller receives the first control signal; a first end of the first switch tube 104 is connected to the power output end, and a second end of the first switch tube 104 is connected to the battery 105. When the detected voltage change rate is smaller than the preset threshold, the first end and the second end of the first switch tube 104 are controlled to be disconnected, so that the battery cannot be charged or discharged, and the loss of the service life of the battery is reduced.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a power supply circuit provided in an embodiment of the present invention, a difference between this embodiment and the previous embodiment is that the first switching tube 104 is replaced by a first MOS tube 1041 in this embodiment, and as shown in fig. 2, the power supply circuit 100 includes: the power supply sub-circuit 101, the detection sub-circuit 102, the first controller 103, the first MOS transistor 1041 and the battery 105; wherein,
the power supply output end of the power supply sub-circuit 101 is connected with a system load 106;
the detection end of the detection sub-circuit 102 is connected to the power output end, the output end of the detection sub-circuit 102 is connected to the input end of the first controller, the detection end is used for detecting the voltage change rate of the power output end, and if the voltage change rate is smaller than a preset threshold value, a first control signal is sent to the first controller 103;
the output end of the first controller 103 is connected to the gate of the first MOS transistor 1041, and the first controller 103 is configured to control the source and the drain of the first MOS transistor 1041 to be switched from the on state to the off state if the first control signal is received;
the drain of the first MOS transistor 1041 is connected to the power output terminal, and the source of the first MOS transistor 1041 is connected to the battery 105.
In the embodiment of the present invention, the direct connection relationship and the operation principle of the circuit have been described in detail in the previous embodiment, and are not repeated herein. The only different difference is that the first switching tube 104 is replaced by a first MOS tube, the gate of the first MOS tube 1041 is connected to the output end of the first controller 103, the drain of the first MOS tube 1041 is connected to the power output end, and the source of the first MOS tube 1041 is connected to the battery 105. The gate voltage of the first MOS transistor 1041 is controlled to control the conduction and the disconnection between the source and the drain of the first MOS transistor 1041. When the source and the drain of the first MOS transistor 1041 are disconnected, the battery is not charged or discharged, and the loss of the battery life is reduced. Of course, the first MOS transistor 1041 may be an NMOS transistor or a PMOS transistor. The working principle of the NMOS tube is that when the grid voltage of the NMOS tube is greater than the source voltage, the source and the drain of the NMOS tube are conducted; when the grid voltage of the NMOS tube is not more than the source voltage, the source electrode and the drain electrode of the NMOS tube are disconnected. The working principle of the PMOS tube is that when the grid voltage of the PMOS tube is less than the source voltage, the source electrode and the drain electrode of the PMOS tube are conducted; when the grid voltage of the PMOS tube is not less than the source voltage, the source electrode and the drain electrode of the PMOS tube are disconnected. To the MOS pipe of which kind of model of use, the embodiment of the utility model provides a do not do the restriction.
Optionally, as shown in fig. 3, the power supply sub-circuit 101 includes a power supply input terminal, a switch circuit 1011 and an inductor 1012, a first terminal of the switch circuit 1011 is connected to the power supply input terminal, and a second terminal of the switch circuit 1011 is connected to the system load through the inductor 1012.
In this embodiment, the switch circuit can control the circuit to be turned on or off, so that the circuit can be controlled more flexibly. The switching circuit may have one MOS transistor or may have a plurality of MOS transistors for control, and this embodiment is not limited thereto. An inductor 1012 is added to the power supply sub-circuit 101 to store energy in the circuit, and the stored energy is proportional to the inductance of the power supply sub-circuit and the square of the current flowing through the inductor 1012.
Optionally, as shown in fig. 4, the switching circuit 1011 further includes a second switching tube 10111, a third switching tube 10112 and a second controller 10113, the second switch tube 10111 comprises a first end, a second end and a control end for controlling the conduction of the first end and the second end, the third switching tube 10112 comprises a first end, a second end and a control end for controlling the conduction of the first end and the second end, the power input terminal is connected to a first terminal of the second switching tube 10111, a second terminal of the second switching tube 10111 is connected to a first terminal of the inductor 1012, a first terminal of the third switch tube 10112 is grounded, a second terminal of the third switch tube 10112 is connected to the first terminal of the inductor 1012, a first output terminal of the second controller 10113 is connected to a control terminal of the second switching tube 10111, a second output terminal of the second controller 10113 is connected to a control terminal of the third switching tube 10112.
In this embodiment, a voltage step-down circuit can be formed by the connection relationship of the second switching tube 10111, the third switching tube 10112 and the second controller 10113. When the second controller 10113 controls the conduction between the first end and the second end of the second switching tube 10111 and controls the disconnection between the first end and the second end of the third switching tube 10112, the inductor is charged, and the voltage of the power output end is increased; when the second controller 10113 controls the first terminal and the second terminal of the second switching tube 10111 to be disconnected and controls the first terminal and the second terminal of the third switching tube 10112 to be connected, the inductor discharges to the ground through the first terminal of the third switching tube 10112, and the voltage of the power output end is reduced. By controlling the timing sequence of the second controller 10113, the voltage at the power output terminal is not too high, which protects both the battery 105 and the system load 106, and prevents the battery 105 or the system load 106 from being broken down due to the too high voltage.
In this embodiment, a connection line between the first controller 103 and the first MOS transistor 1041 and a connection line between the first controller 103 and the second switching transistor 10111 may also be added to the circuit, so as to detect the output current of the first MOS transistor 1041 and the input current of the second switching transistor 10111, and disconnect the source and the drain of the first MOS transistor 1041 when both the output current of the first MOS transistor 1041 and the input current of the second switching transistor 10111 are smaller than a preset current value; or, when the sum of the output current of the first MOS transistor 1041 and the input current of the second switching transistor 10111 is smaller than a preset current value, the source and the drain of the first MOS transistor 1041 are disconnected, which is only used as an auxiliary determination condition, and the final determination condition is also based on the voltage change rate of the power output terminal.
Optionally, as shown in fig. 5, the second switching tube 10111 is a second MOS tube 101111, a drain of the second MOS tube 101111 is connected to the power input end, a source of the second MOS tube 101111 is connected to the first end of the inductor 1012, a gate of the second MOS tube 101111 is connected to the first output end of the second controller 10113, and a second end of the inductor 1012 is the power output end.
In this embodiment, only the second switching tube 10111 is replaced by the second MOS tube 101111, and the operating principle of the MOS tube has been described in detail in the embodiment of the present invention, and is not described herein again.
Optionally, as shown in fig. 6, the third switching transistor 10112 is a third MOS 101121, the source of the third MOS 101121 is grounded, the drain of the third MOS 101121 is connected to the first end of the inductor 1012, the gate of the third MOS 101121 is connected to the second output terminal of the second controller 10113, and the second end of the inductor 1012 is the power output terminal.
In this embodiment, only the third switching transistor 10112 is replaced by the third MOS transistor 101121, and the operating principle of the MOS transistor has been described in detail in the embodiment of the present invention, and is not described herein again.
Optionally, as shown in fig. 7, the power supply circuit 100 further includes a capacitor 107, a first end of the capacitor 107 is connected to the power output terminal, and a second end of the capacitor is grounded.
In this embodiment, the capacitor 107 has the functions of storing energy and stabilizing voltage, and the stored energy is proportional to the square of the self-capacitance and the voltage across the capacitor. When a capacitor is arranged at the power input end of the circuit and is connected with the power supply equipment in parallel, because the impedance of the bypass capacitor is far smaller than the inductive reactance on the distribution line, the sudden current flows from the bypass capacitor and does not flow through the power distribution line any more, and therefore no voltage is generated on the inductance on the power distribution line. The bypass capacitor reduces the variation of the current on the power distribution line and smoothes the supply current on the power distribution line to a continuous average current. It can be considered that, during high-speed current switching, the low impedance of the shunt capacitor in parallel short-circuits the high-impedance power supply device channel, so as to provide the required rapidly-changing current for the circuit system. The power supply apparatus maintains the current required for steady state and slow change and continuously supplements the bypass capacitor with charge. However, this does not cause high speed current changes in the power supply equipment and the current distribution lines. The arrangement of the bypass capacitor reduces the high-speed current change on the power supply, the induction voltage of the inductor on the power distribution line is correspondingly reduced, and the voltage stabilization is realized.
The utility model discloses a supply circuit of embodiment is applied to mobile terminal for supply power to system load 106, include: the power supply sub-circuit 101, the detection sub-circuit 102, the first controller 103, the first MOS transistor 1041 and the battery 105; wherein, the power output terminal of the power supply sub-circuit 101 is connected with the system load 106; the detection end of the detection sub-circuit 102 is connected to the power output end, the output end of the detection sub-circuit 102 is connected to the input end of the first controller, the detection end is used for detecting the voltage change rate of the power output end, and if the voltage change rate is smaller than a preset threshold value, a first control signal is sent to the first controller 103; the output end of the first controller 103 is connected to the gate of the first MOS transistor 1041, and the first controller 103 is configured to control the source and the drain of the first MOS transistor 1041 to be switched from the on state to the off state if the first control signal is received; the drain of the first MOS transistor 1041 is connected to the power output terminal, and the source of the first MOS transistor 1041 is connected to the battery 105. When the detected voltage change rate is smaller than the preset threshold, the source and the drain of the first MOS transistor 1041 are controlled to be disconnected, so that the battery is not charged and discharged, and the loss of the service life of the battery is reduced.
The embodiment of the utility model provides a still provide a mobile terminal, including above-mentioned supply circuit.
Optionally, the mobile terminal includes:
a cell phone, a tablet, a laptop, a personal digital assistant, a mobile web appliance, or a wearable device.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A power supply circuit applied to a mobile terminal and used for supplying power to a system load is characterized by comprising: the power supply sub-circuit, the detection sub-circuit, the first controller, the first switch tube and the battery; wherein,
the power supply output end of the power supply sub-circuit is connected with the system load;
the detection end of the detection sub-circuit is connected with the power supply output end, the output end of the detection sub-circuit is connected with the input end of the first controller, the detection end is used for detecting the voltage change rate of the power supply output end, and if the voltage change rate is smaller than a preset threshold value, a first control signal is sent to the first controller;
the output end of the first controller is connected with the control end of the first switch tube, and the first controller is used for controlling the first end and the second end of the first switch tube to be switched from a conducting state to a disconnecting state if the first controller receives the first control signal;
the first end of the first switch tube is connected with the power output end, and the second end of the first switch tube is connected with the battery.
2. The power supply circuit according to claim 1, wherein the detection terminal of the detection sub-circuit is further configured to send a second control signal to the first controller if it is detected that the voltage change rate is greater than or equal to the preset threshold;
the first controller is used for controlling the first end and the second end of the first switch tube to be switched from an off state to an on state if the second control signal is received.
3. The power supply circuit according to claim 1 or 2, wherein the first switching transistor is a first MOS transistor, a drain of the first MOS transistor is connected to the power output terminal, a source of the first MOS transistor is connected to the battery, and a gate of the first MOS transistor is connected to the output terminal of the first controller.
4. The power supply circuit of claim 1 or 2, wherein the power supply sub-circuit comprises a power supply input terminal, a switching circuit and an inductor, wherein a first terminal of the switching circuit is connected to the power supply input terminal, and wherein a second terminal of the switching circuit is connected to the system load via the inductor.
5. The power supply circuit of claim 4, wherein the switch circuit comprises a second switch tube, a third switch tube and a second controller, the second switch tube comprises a first end, a second end and a control end for controlling the conduction of the first end and the second end, the third switching tube comprises a first end, a second end and a control end for controlling the conduction of the first end and the second end, the power input end is connected with the first end of the second switch tube, the second end of the second switch tube is connected with the first end of the inductor, the first end of the third switching tube is grounded, the second end of the third switching tube is connected with the first end of the inductor, the first output end of the second controller is connected with the control end of the second switch tube, and the second output end of the second controller is connected with the control end of the third switch tube.
6. The power supply circuit according to claim 5, wherein the second switching transistor is a second MOS transistor, a drain of the second MOS transistor is connected to the power input terminal, a source of the second MOS transistor is connected to the first terminal of the inductor, a gate of the second MOS transistor is connected to the first output terminal of the second controller, and the second terminal of the inductor is the power output terminal.
7. The power supply circuit of claim 5, wherein the third switching transistor is a third MOS transistor, a source of the third MOS transistor is grounded, a drain of the third MOS transistor is connected to the first end of the inductor, a gate of the third MOS transistor is connected to the second output terminal of the second controller, and the second end of the inductor is the power output terminal.
8. The power supply circuit according to claim 1 or 2, wherein the power supply circuit further comprises a capacitor, a first terminal of the capacitor is connected to the power output terminal, and a second terminal of the capacitor is grounded.
9. A mobile terminal characterized by comprising a power supply circuit according to any one of claims 1 to 8.
10. The mobile terminal according to claim 9, wherein the mobile terminal comprises:
a cell phone, a tablet, a laptop, a personal digital assistant, a mobile web appliance, or a wearable device.
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| CN201720605800.5U CN206962484U (en) | 2017-05-27 | 2017-05-27 | A kind of power supply circuit and mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030237A (en) * | 2019-12-25 | 2020-04-17 | 江苏紫米电子技术有限公司 | Mobile power supply and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030237A (en) * | 2019-12-25 | 2020-04-17 | 江苏紫米电子技术有限公司 | Mobile power supply and working method thereof |
| CN111030237B (en) * | 2019-12-25 | 2024-06-11 | 江苏紫米电子技术有限公司 | Mobile power supply and working method thereof |
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