CN112968497A - Battery power supply control circuit and electronic equipment - Google Patents
Battery power supply control circuit and electronic equipment Download PDFInfo
- Publication number
- CN112968497A CN112968497A CN202110261982.XA CN202110261982A CN112968497A CN 112968497 A CN112968497 A CN 112968497A CN 202110261982 A CN202110261982 A CN 202110261982A CN 112968497 A CN112968497 A CN 112968497A
- Authority
- CN
- China
- Prior art keywords
- power supply
- battery
- switch
- channel mos
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000007420 reactivation Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
Abstract
The embodiment of the invention relates to the technical field of electronic circuits, in particular to a battery power supply control circuit and electronic equipment. An embodiment of the present invention provides a battery power supply control circuit and an electronic device, including: the device comprises a power supply end, a switch circuit, a control unit and at least one key; the power supply end is connected with the first end of the control unit; the first end of the switch circuit is connected with the power supply end, the second end of the switch circuit is connected with the battery, the third end of the switch circuit is respectively connected with the power supply end and the second end of the control unit, and the switch circuit is used for switching on or switching off the first end and the second end of the switch circuit according to a power supply signal of the power supply end or a first control signal of the control unit; the control unit is also used for outputting a first control signal to the switch circuit according to the input information of at least one key. The battery power supply control circuit outputs the first control signal through the control unit according to the input information of the key so as to disconnect the switch circuit, thereby completely cutting off the power supply of the battery to the mainboard and reducing the loss of the battery in the shutdown state.
Description
Technical Field
The embodiment of the invention relates to the technical field of electronic circuits, in particular to a battery power supply control circuit and electronic equipment.
Background
At present, notebook computers are generally provided with rechargeable lithium ion batteries, and the service life and the endurance time of the batteries play a vital role in the portability of the notebook computers. Since the service life of the battery is related to the charging times of the battery, reducing the charging times of the battery can effectively prolong the service life of the battery. Research finds that reducing the loss of the battery in the shutdown state of the notebook computer is a method for effectively prolonging the endurance time and the service life of the notebook computer. Under the general condition, after the notebook computer is shut down, if the power supply of the mainboard is not completely cut off, the startup control chip on the mainboard still obtains the power supply of the battery, and the startup control chip still continues to work to ensure that a user can normally start up, but the power can be gradually lost, if the notebook computer is not charged for a long time, the battery can be over-discharged and damaged, and only the plugging battery can be eliminated.
However, most batteries are connected and inserted into the main machine of the notebook computer, and the batteries are inconvenient to detach due to the fact that the buckles are locked, so that the batteries can be pulled out, the loss of the batteries can be reduced, physical damage can be caused to the batteries and the main machine, and the method is not only troublesome, but also has certain risks.
Disclosure of Invention
The embodiment of the invention aims to provide a battery power supply control circuit and electronic equipment, which can completely cut off power supply between a battery and a mainboard without pulling out the battery, reduce the loss of the battery and avoid the damage of the battery caused by over-discharge.
In a first aspect, one technical solution adopted in the embodiments of the present invention is: there is provided a battery powered control circuit comprising: the device comprises a power supply end, a switch circuit, a control unit and at least one key; the power supply end is connected with the first end of the control unit and used for supplying power to the control unit when receiving an external power supply; the first end of the switch circuit is connected with the power supply end, the second end of the switch circuit is connected with a battery, the third end of the switch circuit is respectively connected with the power supply end and the second end of the control unit, and the switch circuit is used for switching on the first end and the second end of the switch circuit according to a power supply signal of the power supply end and switching off the first end and the second end of the switch circuit according to a first control signal of the control unit; the at least one key is connected with the third end of the control unit, the at least one key is used for receiving external input information, and the control unit is further used for outputting the first control signal to the switch circuit according to the input information.
In some embodiments, the switching circuit includes a first switching unit and a second switching unit; the first end of the first switch unit is connected with the power supply end, the second end of the first switch unit is connected with the battery, the third end of the first switch unit is connected with the first end of the second switch unit, and the first switch unit is used for switching on or switching off the first end and the second end of the switch circuit according to a second control signal of the second switch unit; the second terminal of the second switch unit is connected to the power supply terminal, the third terminal of the second switch unit is connected to the second terminal of the control unit, and the second switch unit is configured to output the second control signal based on the power supply signal and the first control signal.
In some embodiments, the first switching unit comprises a first switching tube and a second switching tube; the first end of the first switch tube is connected with the power supply end, the second end of the first switch tube is connected with the first end of the second switch tube, the second end of the second switch tube is connected with the battery, and the third end of the first switch tube and the third end of the second switch tube are both connected with the first end of the second switch unit.
In some embodiments, the first switching tube is a first P-channel MOS tube, and the second switching tube is a second P-channel MOS tube; the drain electrode of the first P-channel MOS tube is connected with the power supply end, the source electrode of the first P-channel MOS tube is connected with the source electrode of the second P-channel MOS tube, the drain electrode of the second P-channel MOS tube is connected with the battery, and the grid electrode of the first P-channel MOS tube and the grid electrode of the second P-channel MOS tube are both connected with the first end of the second switch unit.
In some embodiments, the first switching unit further includes a first resistor, a second resistor, a third resistor, and a fourth resistor; the first end of the first resistor is connected with the grid electrode of the first P-channel MOS tube, and the second end of the first resistor is connected with the first end of the fourth resistor; the first end of the second resistor is connected with the grid electrode of the second P-channel MOS tube, and the second end of the second resistor is connected with the first end of the fourth resistor; the first end of the third resistor is connected with the source electrode of the first P-channel MOS tube, the second end of the third resistor is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the first end of the second switch unit.
In some embodiments, the first switch unit further includes a first capacitor connected in series between the drain of the first P-channel MOS transistor and the first end of the fourth resistor.
In some embodiments, the second switch unit further includes a second capacitor connected in series between the drain of the second P-channel MOS transistor and the first end of the fourth resistor.
In some embodiments, the second switching unit includes an N-channel MOS transistor; the drain electrode of the N-channel MOS tube is connected with the third end of the first switch unit, the source electrode of the N-channel MOS tube is grounded, and the grid electrode of the N-channel MOS tube is connected with the power supply end and the second end of the control unit.
In some embodiments, the second switching unit further comprises a current limiting resistor; one end of the current-limiting resistor is connected with the grid electrode of the N-channel MOS tube, and the other end of the current-limiting resistor is connected with the power supply end.
In a second aspect, an embodiment of the present invention further provides an electronic device, including the battery-powered control circuit according to any one of the first aspect.
Compared with the prior art, the invention has the beneficial effects that: in contrast to the prior art, an embodiment of the present invention provides a battery-powered control circuit and an electronic device, including: the device comprises a power supply end, a switch circuit, a control unit and at least one key; the power supply end is connected with the first end of the control unit; the first end of the switch circuit is connected with the power supply end, the second end of the switch circuit is connected with the battery, the third end of the switch circuit is respectively connected with the power supply end and the second end of the control unit, and the switch circuit is used for switching on or switching off the first end and the second end of the switch circuit according to a power supply signal of the power supply end or a first control signal of the control unit; the control unit is also used for outputting a first control signal to the switch circuit according to the input information of at least one key. The battery power supply control circuit outputs a first control signal through the control unit according to the input information of the key, so that the first end and the second end of the switch circuit are disconnected, the discharge channel of the battery is completely closed, the power supply of the battery to the mainboard is completely cut off, and the loss of the battery in a shutdown state is reduced.
Drawings
One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a schematic structural block diagram of a battery power supply control circuit according to an embodiment of the present invention;
FIG. 2 is a block diagram of another battery power control circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit structure diagram of a battery power supply control circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that, if not conflicted, the various features of the embodiments of the invention may be combined with each other within the scope of protection of the present application. In addition, although the functional blocks are divided in the device diagram, in some cases, the blocks may be divided differently from those in the device. Further, the terms "first," "second," and the like, as used herein, do not limit the data and the execution order, but merely distinguish the same items or similar items having substantially the same functions and actions.
Referring to fig. 1, a battery power supply control circuit 100 according to an embodiment of the present invention includes: a power source terminal 10, a switching circuit 20, a control unit 30, and at least one key 40.
The power supply end 10 is connected to a first end of the control unit 30, and the power supply end 10 is used for supplying power to the control unit 30 when receiving an external power supply. It can be understood that the power end 10 corresponds to a power module of an electronic device or a system power, and may be configured to receive an external power, for example, the power end 10 may be plugged into an external power through a charger or an adapter, at which time the power end 10 may receive the external power, and the power received by the power end 10 may be used to power the control unit 30, the battery 200, or other modules in the electronic device, for example, the power end 10 may also be connected to a system motherboard, at which time the power received by the power end 10 may also be used to power the system motherboard; meanwhile, when the power supply terminal 10 is not plugged into an external power supply, the power supply terminal 10 may supply power to the control unit 30 or other modules in the electronic device by using the electric energy of the battery 200.
The first terminal of the switch circuit 20 is connected to the power source terminal 10, the second terminal of the switch circuit 20 is connected to the battery 200, the third terminal of the switch circuit 20 is respectively connected to the power source terminal 10 and the second terminal of the control unit 30, and the switch circuit 20 is configured to turn on the first terminal and the second terminal of the switch circuit 20 according to the power source signal of the power source terminal 10 and turn off the first terminal and the second terminal of the switch circuit 20 according to the first control signal of the control unit 30. When the first terminal and the second terminal of the switching circuit 20 are turned on, a battery charging or battery discharging function may be implemented between the battery 20 and the power source terminal 10.
The at least one key 40 is connected to a third end of the control unit 30, the at least one key 40 is configured to receive external input information, and the control unit 30 is further configured to output a first control signal to the switch circuit 20 according to the input information.
In the power supply control circuit of the battery 200, when the power supply end 10 is not connected with an external power supply, for example, after a charger or an adapter is unplugged, the battery 200 also supplies power to the control unit 30 through the switch circuit 20, at this time, when the key 40 is pressed, the control unit 30 will detect the input information that the key 40 is pressed, and then, the control unit 30 outputs a first control signal to the switch circuit 20 to disconnect the first end and the second end of the switch circuit 20, so that the connection between the battery 200 and the power supply end 10 can be completely cut off, that is, the power supply of the battery 200 to a system is completely cut off, and the loss of the battery 200 is reduced; when the power supply terminal 10 needs to be powered on, the power supply terminal 10 is reconnected to an external power supply, for example, a charger or an adapter is reconnected, at this time, the power supply terminal 10 is powered, a part of electric energy obtained by the power supply terminal 10 is used as a power supply signal, and the power supply signal is input to the third terminal of the switch circuit 20, so that the first terminal and the second terminal of the switch circuit 20 are conducted, and the power supply terminal 10 and the battery 200 are conducted. It can be seen that, in the power supply control circuit of the battery 200, if the user does not use the electronic device for a long time, the key 40 can control the control unit 30 to output the first control signal to close the discharge channel of the battery 200, and the connection between the battery 200 and the power source terminal 10 can be completely disconnected without unplugging the battery 200, so that the loss of the battery 200 in the shutdown state is reduced, and the battery 200 can be protected.
In some embodiments, referring to fig. 2, the switch circuit 20 includes a first switch unit 21 and a second switch unit 22; wherein, a first end of the first switch unit 21 is connected to the power supply terminal 10, a second end of the first switch unit 21 is connected to the battery 200, a third end of the first switch unit 21 is connected to a first end of the second switch unit 22, and the first switch unit 21 is configured to turn on or off the first end and the second end of the switch circuit 20 according to a second control signal of the second switch unit 22; a second terminal of the second switching unit 22 is connected to the power supply terminal 10, a third terminal of the second switching unit 22 is connected to a second terminal of the control unit 30, and the second switching unit 22 is configured to output a second control signal based on the power supply signal of the power supply terminal 10 and the first control signal of the control unit 30. At this time, the first switch unit 21 can realize normal charge and discharge of the battery 200 under normal conditions, and the on or off of the first switch unit 21 is also controlled by the second switch unit 22, so that it is possible to realize complete disconnection of the power supply of the battery 200 by controlling the control unit 30 to output the first control signal through the key 40 or reactivation of the battery 200 for normal charge and discharge through the power signal of the power source terminal 10 under specific requirements.
In some embodiments, referring to fig. 3, the first switch unit 21 includes a first switch Q1 and a second switch Q2; a first terminal of the first switch transistor Q1 is connected to the power supply terminal 10, a second terminal of the first switch transistor Q1 is connected to a first terminal of the second switch transistor Q2, a second terminal of the second switch transistor Q2 is connected to the battery 200, and a third terminal of the first switch transistor Q1 and a third terminal of the second switch transistor Q2 are both connected to a first terminal of the second switch unit 22.
Specifically, with reference to fig. 3, the first switch Q1 is a first P-channel MOS transistor, and the second switch Q2 is a second P-channel MOS transistor; the drain of the first P-channel MOS transistor Q1 is connected to the power supply terminal 10, the source of the first P-channel MOS transistor Q1 is connected to the source of the second P-channel MOS transistor Q2, the drain of the second P-channel MOS transistor Q2 is connected to the battery 200, and the gate of the first P-channel MOS transistor Q1 and the gate of the second P-channel MOS transistor Q2 are both connected to the first end of the second switch unit 22. Therefore, normal charging and discharging of the battery 200 can be realized through the two MOS tubes which are connected in series in an opposite direction, and because the first P-channel MOS tube Q1 and the second P-channel MOS tube Q2 are both provided with an internal diode, the current can be prevented from flowing backwards, so that the battery 200 can be safer during charging and discharging.
In some embodiments, referring to fig. 3 again, the first switch unit 21 further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; a first end of the first resistor R1 is connected with the gate of the first P-channel MOS transistor Q1, and a second end of the first resistor R1 is connected with a first end of the fourth resistor R4; a first end of the second resistor R2 is connected with the gate of the second P-channel MOS transistor Q2, and a second end of the second resistor R2 is connected with a first end of the fourth resistor R4; a first terminal of the third resistor R3 is connected to the source of the first P-channel MOS transistor Q1, a second terminal of the third resistor R3 is connected to a first terminal of the fourth resistor R4, and a second terminal of the fourth resistor R4 is connected to a first terminal of the second switch unit 22. The first resistor R1 can be used for adjusting the switching speed of the first P-channel MOS transistor Q1, the second resistor R2 can be used for adjusting the switching speed of the second P-channel MOS transistor Q2, and the third resistor R3 and the fourth resistor R4 can be used for adjusting the voltage between the grid and the source of the P-channel MOS transistor, so that the first P-channel MOS transistor Q1 and the second P-channel MOS transistor Q2 are in a low impedance state when working, and the overall loss is reduced.
In some embodiments, the first switch unit 21 further includes a first capacitor C1, and the first capacitor C1 is connected in series between the drain of the first P-channel MOS transistor Q1 and the first end of the fourth resistor R4. The first capacitor C1 can be used to adjust the turn-on speed of the first P-channel MOS transistor Q1. Similarly, in some embodiments, the second switch unit 22 further includes a second capacitor C2, and the second capacitor C2 is connected in series between the drain of the second P-channel MOS transistor Q2 and the first end of the fourth resistor R4. The second capacitor C2 can be used to adjust the turn-on speed of the second P-channel MOS transistor Q2. By adopting the first capacitor C1 and the second capacitor C2, the surge current caused by the overlarge turn-on speed of the first P-channel MOS transistor Q1 and the second P-channel MOS transistor Q2 can be prevented from being overlarge, and the P-channel MOS transistors are prevented from being damaged.
In some embodiments, with continued reference to fig. 3, the second switching unit 22 includes an N-channel MOS transistor Q3; the drain of the N-channel MOS transistor Q3 is connected to the third terminal of the first switch unit 21, the source of the N-channel MOS transistor Q3 is grounded, and the gate of the N-channel MOS transistor Q3 is connected to the power supply terminal 10 and the second terminal of the control unit 30.
In some of these embodiments, the second switching unit 22 further includes a current limiting resistor Rp; one end of the current-limiting resistor Rp is connected to the gate of the N-channel MOS transistor Q3, and the other end of the current-limiting resistor Rp is connected to the power supply terminal 10. Through the current-limiting resistor Rp, a power supply signal input by the power supply end 10 can be adjusted, and the N-channel MOS transistor Q3 is prevented from being damaged. Further, the current-limiting resistor Rp may be connected to the power supply terminal 10 through a low dropout regulator, the control unit 30 may also be connected to the power supply terminal 10 through a low dropout regulator, and the current-limiting resistor Rp and the control unit 30 may use the same low dropout regulator or two low dropout regulators when connected to the power supply terminal 10. In practical applications, the current limiting resistor Rp and the control unit 30 may be connected to the power source terminal 10 by using other voltage dropping modules, which is not limited herein.
The specific operation of the battery-powered control circuit provided by the present invention is described in detail below with reference to the embodiment shown in fig. 3. Specifically, in the notebook, the control unit 30 may adopt an on-board control chip, and the at least one key 40 may adopt an Fn key and a Power button key on a keyboard of the notebook, where the Fn key and the Power button key are both connected to the control unit 30. In practical applications, the key combination may be any other suitable key combination, and the limitation in this embodiment is not required.
At this time, if the electronic device is not used for a long time, when the Power supply terminal 10 is not connected to an external Power supply, for example, after the charger or the adaptor is unplugged, the Fn button and the Power button on the notebook keyboard are pressed at the same time, the control unit 30 will detect the input information that the Fn button and the Power button on the notebook keyboard are pressed at the same time, then, the control unit 30 outputs the first control signal of low level to the gate of the N-channel MOS transistor Q3, the N-channel MOS transistor Q3 is not turned on, at this time, the first P-channel MOS transistor Q1 and the second P-channel MOS transistor Q2 are not turned on, so that the connection between the battery 200 and the Power supply terminal 10 can be completely cut off, that is, the Power supply of the battery 200 to the system is completely cut off, and the loss of the battery 200 is reduced.
When the battery 200 and the power supply terminal 10 need to be reconnected, the power supply terminal 10 is reconnected to an external power supply, for example, a charger or an adapter is reconnected, at this time, the power supply terminal 10 is powered, then a part of electric energy obtained by the power supply terminal 10 is used as a high-level power supply signal, the power supply signal is input to the gate of the N-channel MOS transistor Q3 through the current-limiting resistor Rp, the N-channel MOS transistor Q3 is turned on, so that the gates of the first P-channel MOS transistor Q1 and the second P-channel MOS transistor Q2 are pulled low, at this time, the first P-channel MOS transistor Q1 and the second P-channel MOS transistor Q2 are both turned on, and thus the power supply terminal 10 and the battery 200 are turned on.
In summary, in the battery power supply control circuit, if the user does not use the electronic device for a long time, when the power supply terminal 10 is not connected to the external power supply, the button 40 can close the discharge channel of the battery 200, and the connection between the battery 200 and the power supply terminal 10 can be completely disconnected without unplugging the battery 200, so that the loss of the battery 200 in the shutdown state is reduced, the service life of the battery is prolonged, and the battery 200 can be protected.
In addition, when the battery needs to be plugged and unplugged under some special conditions, for example, when the power-on control chip of the notebook computer has an error, the computer cannot be started or even forcibly shut down, and the computer cannot function, the computer can be repaired only by plugging and unplugging the battery. When the battery power supply control circuit is used, the battery can be restarted under the special conditions without plugging and unplugging the battery, the connection between the power supply end 10 and an external power supply is only disconnected firstly, then the connection between the battery 200 and the power supply end 10 is completely disconnected through the key 40, the discharge channel of the battery 200 is disconnected, and finally the power supply end 10 is connected with the external power supply again, so that the external power supply can input a power supply signal to the N-channel MOS tube Q3 through the power supply end 10, the two P-channel MOS tubes are re-opened, the battery 200 and the power supply end 10 are connected, at the moment, the battery 200 is electrified again, the purpose of starting the computer is achieved, a subsequent user can upgrade the firmware on line to repair the computer, and the trouble of selling is.
In a second aspect, an embodiment of the present invention further provides an electronic device, including the battery-powered control circuit according to any one of the first aspect. The electronic device is generally a notebook computer or other device requiring battery power. The electronic equipment provided by the invention comprises the battery power supply control circuit, if a user does not use the electronic equipment for a long time, the discharging channel of the battery can be closed through the key, the connection between the battery and the power supply end can be completely disconnected without pulling the battery, the loss of the battery in a shutdown state is reduced, and the battery can be protected.
An embodiment of the present invention provides a battery power supply control circuit and an electronic device, including: the device comprises a power supply end, a switch circuit, a control unit and at least one key; the power supply end is connected with the first end of the control unit; the first end of the switch circuit is connected with the power supply end, the second end of the switch circuit is connected with the battery, the third end of the switch circuit is respectively connected with the power supply end and the second end of the control unit, and the switch circuit is used for switching on or switching off the first end and the second end of the switch circuit according to a power supply signal of the power supply end or a first control signal of the control unit; the control unit is also used for outputting a first control signal to the switch circuit according to the input information of at least one key. The battery power supply control circuit outputs the first control signal through the control unit according to the input information of the key so as to disconnect the switch circuit, thereby completely cutting off the power supply of the battery to the mainboard and reducing the loss of the battery in the shutdown state.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A battery-powered control circuit, comprising: the device comprises a power supply end, a switch circuit, a control unit and at least one key;
the power supply end is connected with the first end of the control unit and used for supplying power to the control unit when receiving an external power supply;
the first end of the switch circuit is connected with the power supply end, the second end of the switch circuit is connected with a battery, the third end of the switch circuit is respectively connected with the power supply end and the second end of the control unit, and the switch circuit is used for switching on the first end and the second end of the switch circuit according to a power supply signal of the power supply end and switching off the first end and the second end of the switch circuit according to a first control signal of the control unit;
the at least one key is connected with the third end of the control unit, the at least one key is used for receiving external input information, and the control unit is further used for outputting the first control signal to the switch circuit according to the input information.
2. The battery-powered control circuit of claim 1, wherein the switching circuit comprises a first switching unit and a second switching unit;
the first end of the first switch unit is connected with the power supply end, the second end of the first switch unit is connected with the battery, the third end of the first switch unit is connected with the first end of the second switch unit, and the first switch unit is used for switching on or switching off the first end and the second end of the switch circuit according to a second control signal of the second switch unit;
the second terminal of the second switch unit is connected to the power supply terminal, the third terminal of the second switch unit is connected to the second terminal of the control unit, and the second switch unit is configured to output the second control signal based on the power supply signal and the first control signal.
3. The battery-powered control circuit of claim 2, wherein the first switching unit comprises a first switching tube and a second switching tube;
the first end of the first switch tube is connected with the power supply end, the second end of the first switch tube is connected with the first end of the second switch tube, the second end of the second switch tube is connected with the battery, and the third end of the first switch tube and the third end of the second switch tube are both connected with the first end of the second switch unit.
4. The battery power supply control circuit according to claim 3, wherein the first switch transistor is a first P-channel MOS transistor, and the second switch transistor is a second P-channel MOS transistor;
the drain electrode of the first P-channel MOS tube is connected with the power supply end, the source electrode of the first P-channel MOS tube is connected with the source electrode of the second P-channel MOS tube, the drain electrode of the second P-channel MOS tube is connected with the battery, and the grid electrode of the first P-channel MOS tube and the grid electrode of the second P-channel MOS tube are both connected with the first end of the second switch unit.
5. The battery-powered control circuit of claim 4, wherein the first switching unit further comprises a first resistor, a second resistor, a third resistor, and a fourth resistor;
the first end of the first resistor is connected with the grid electrode of the first P-channel MOS tube, and the second end of the first resistor is connected with the first end of the fourth resistor;
the first end of the second resistor is connected with the grid electrode of the second P-channel MOS tube, and the second end of the second resistor is connected with the first end of the fourth resistor;
the first end of the third resistor is connected with the source electrode of the first P-channel MOS tube, the second end of the third resistor is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the first end of the second switch unit.
6. The battery-powered control circuit of claim 5, wherein the first switch unit further comprises a first capacitor connected in series between the drain of the first P-channel MOS transistor and the first end of the fourth resistor.
7. The battery-powered control circuit of claim 5, wherein the second switch unit further comprises a second capacitor connected in series between the drain of the second P-channel MOS transistor and the first end of the fourth resistor.
8. The battery-powered control circuit of any of claims 2-7, wherein the second switching unit comprises an N-channel MOS transistor;
the drain electrode of the N-channel MOS tube is connected with the third end of the first switch unit, the source electrode of the N-channel MOS tube is grounded, and the grid electrode of the N-channel MOS tube is connected with the power supply end and the second end of the control unit.
9. The battery-powered control circuit of claim 8, wherein the second switching unit further comprises a current limiting resistor;
one end of the current-limiting resistor is connected with the grid electrode of the N-channel MOS tube, and the other end of the current-limiting resistor is connected with the power supply end.
10. An electronic device comprising a battery-operated control circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110261982.XA CN112968497A (en) | 2021-03-10 | 2021-03-10 | Battery power supply control circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110261982.XA CN112968497A (en) | 2021-03-10 | 2021-03-10 | Battery power supply control circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112968497A true CN112968497A (en) | 2021-06-15 |
Family
ID=76277187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110261982.XA Pending CN112968497A (en) | 2021-03-10 | 2021-03-10 | Battery power supply control circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112968497A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060053322A1 (en) * | 2004-09-06 | 2006-03-09 | Hon Hai Precision Industry Co., Ltd. | Circuit for saving power of a battery within an electronic equipment while the electronic equipment is powered off |
| CN202906516U (en) * | 2012-10-10 | 2013-04-24 | 易程（苏州）智能***有限公司 | Battery discharging control circuit |
| CN103809492A (en) * | 2014-02-25 | 2014-05-21 | 青岛歌尔声学科技有限公司 | One-key type multifunctional control circuit and wearable electronic product |
| CN206272332U (en) * | 2016-11-07 | 2017-06-20 | 潍坊歌尔电子有限公司 | A kind of power control circuit |
| CN209103135U (en) * | 2018-12-20 | 2019-07-12 | 王小兵 | Boot-strap circuit based on single chip application |
| CN112327696A (en) * | 2020-11-05 | 2021-02-05 | 歌尔科技有限公司 | Key control circuit |
-
2021
- 2021-03-10 CN CN202110261982.XA patent/CN112968497A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060053322A1 (en) * | 2004-09-06 | 2006-03-09 | Hon Hai Precision Industry Co., Ltd. | Circuit for saving power of a battery within an electronic equipment while the electronic equipment is powered off |
| CN202906516U (en) * | 2012-10-10 | 2013-04-24 | 易程（苏州）智能***有限公司 | Battery discharging control circuit |
| CN103809492A (en) * | 2014-02-25 | 2014-05-21 | 青岛歌尔声学科技有限公司 | One-key type multifunctional control circuit and wearable electronic product |
| CN206272332U (en) * | 2016-11-07 | 2017-06-20 | 潍坊歌尔电子有限公司 | A kind of power control circuit |
| CN209103135U (en) * | 2018-12-20 | 2019-07-12 | 王小兵 | Boot-strap circuit based on single chip application |
| CN112327696A (en) * | 2020-11-05 | 2021-02-05 | 歌尔科技有限公司 | Key control circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6396243B2 (en) | Power unit and power source switching apparatus for a computer | |
| US7436149B2 (en) | Systems and methods for interfacing a battery-powered information handling system with a battery pack of a physically separable battery-powered input or input/output device | |
| US7595609B2 (en) | Battery system power path configuration and methods for implementing same | |
| US8405357B2 (en) | Battery unit, battery system, electronic device, charging control method of battery, and discharging control method of battery | |
| US20090184688A1 (en) | Charging appratus and method for mobile terminal | |
| US7795842B2 (en) | Adjustable cut-off voltage for mobile device battery | |
| KR20090003878A (en) | An apparatus for recharging a battery using usb devices in a portable terminal and a method thereof | |
| US20240128775A1 (en) | Charging/Discharging Circuit and Electronic Device | |
| EP3588660B1 (en) | Battery pack and power system comprising same | |
| US7679321B2 (en) | Power circuit | |
| JP7076526B2 (en) | Battery pack with fastening recognition function | |
| US9804648B2 (en) | Dockable device and power method thereof | |
| US7834588B2 (en) | Charging device capable of providing backflow current and inrush current protection | |
| JP2001327088A (en) | Secondary battery control circuit, battery pack comprising the secondary battery control circuit, and mobile device utilizing the battery pack | |
| CN113419617A (en) | Wearable device charging reset circuit and control method | |
| CN111884303B (en) | Charging control circuit, charging control method and electronic device | |
| KR100734128B1 (en) | USB Charging and Data Link system combined with external battery and external memory device | |
| CN112968497A (en) | Battery power supply control circuit and electronic equipment | |
| CN111478407A (en) | Notebook computer power supply circuit with charger function when shutdown and notebook computer | |
| CN113676166B (en) | Battery low-voltage automatic cut-off circuit and working method thereof | |
| CN114709899A (en) | Battery management system, battery management method and unmanned aerial vehicle | |
| KR101628606B1 (en) | A charge control circuit and method of over-discharge battery | |
| CN211236841U (en) | Hardware circuit capable of automatically switching power supply | |
| CN112366763A (en) | Startup and shutdown circuit | |
| JP2005261142A (en) | Charging circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231025 Address after: 518000, 4th Floor, No. 31, Xiacun Community, Gongming Street, Guangming District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Baoxinchuang Information Technology Co.,Ltd. Address before: 518000 501-2, building a, wisdom Plaza, 4068 Qiaoxiang Road, Gaofa community, Shahe street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: Shenzhen baoxinchuang Technology Co.,Ltd. |