CN112383105A - Battery charging and discharging switching circuit of intelligent equipment and intelligent equipment - Google Patents
Battery charging and discharging switching circuit of intelligent equipment and intelligent equipment Download PDFInfo
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- CN112383105A CN112383105A CN202011230405.6A CN202011230405A CN112383105A CN 112383105 A CN112383105 A CN 112383105A CN 202011230405 A CN202011230405 A CN 202011230405A CN 112383105 A CN112383105 A CN 112383105A
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- 238000007599 discharging Methods 0.000 title abstract description 21
- 238000001727 in vivo Methods 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the application relates to a battery charging and discharging switching circuit of intelligent equipment and the intelligent equipment. The circuit of the embodiment of the application comprises a battery connecting end, a power supply connecting end, a P-channel MOS tube, a first voltage division circuit and a conducting switch, wherein the P-channel MOS tube is provided with an internal diode; the source electrode of the P-channel MOS tube is connected with the battery connecting end, the drain electrode of the P-channel MOS tube is connected with the power supply connecting end, the anode of the in-vivo diode is connected with the drain electrode of the P-channel MOS tube, and the cathode of the in-vivo diode is connected with the source electrode of the P-channel MOS tube; the conduction switch comprises a controlled end, a current input end and a current output end, wherein the current input end is connected with the grid electrode of the P-channel MOS tube, and the current output end is grounded; one end of the first voltage division circuit is connected with the battery connecting end, and the other end of the first voltage division circuit is connected with the controlled end. The battery charging and discharging switching circuit of the intelligent equipment is simple in circuit structure, low in cost and applicable to various intelligent equipment with rechargeable batteries.
Description
Technical Field
The embodiment of the application relates to the technical field of battery charging and discharging circuits, in particular to a battery charging and discharging switching circuit of intelligent equipment and the intelligent equipment.
Background
In recent years, rechargeable batteries have been widely used as recyclable energy sources in various smart devices, such as mobile phones, tablet computers, and the like. The intelligent device can be used when the battery is used for supplying power independently, and can also be used when the battery is externally connected with a power supply and is charged.
In a conventional battery charging circuit, a battery charging branch, a battery discharging branch, a switching circuit and a polarity determining circuit are often required to be arranged, the polarity determining circuit determines whether an external power supply is currently connected, and the switching circuit switches to the battery charging branch or the battery discharging branch to work according to whether the external power supply is connected.
However, the charging circuit is complicated.
Disclosure of Invention
The embodiment of the application provides a battery charging and discharging switching circuit of intelligent equipment and intelligent equipment, and the circuit structure of the battery charging and discharging switching circuit of the intelligent equipment is simple, low in cost and applicable to various intelligent equipment with rechargeable batteries.
In a first aspect, an embodiment of the present application provides a battery charging and discharging switching circuit of an intelligent device, including:
the power supply comprises a battery connecting end, a power supply connecting end, a P-channel MOS tube, a first voltage division circuit and a conducting switch, wherein the P-channel MOS tube is provided with an in-vivo diode;
the source electrode of the P-channel MOS tube is connected with the battery connecting end, the drain electrode of the P-channel MOS tube is connected with the power supply connecting end, the anode of the body diode is connected with the drain electrode of the P-channel MOS tube, and the cathode of the body diode is connected with the source electrode of the P-channel MOS tube;
the conducting switch comprises a controlled end, a current input end and a current output end, the current input end is connected with the grid electrode of the P-channel MOS tube, and the current output end is grounded;
one end of the first voltage division circuit is connected with the battery connecting end, and the other end of the first voltage division circuit is connected with the controlled end.
Optionally, the device further comprises a switching device;
one end of the switching device is connected with the controlled end of the conducting switch, and the other end of the switching device is grounded.
Optionally, the switch device is a push-button switch.
Optionally, the button switch is disposed on a side surface of the smart device.
Optionally, the conducting switch is an NPN-type triode;
the controlled end is a base set of the triode, the current input end is a collector of the triode, and the current output end is an emitter of the triode.
Optionally, the first voltage dividing circuit includes a first resistor, one end of the first resistor is connected to the battery connection terminal, and the other end of the first resistor is connected to the controlled terminal.
Optionally, the switching device further comprises a second voltage dividing circuit, and the second voltage dividing circuit is connected in series between the switching device and the controlled terminal.
Optionally, the second voltage-dividing circuit includes a second resistor, one end of the second resistor is connected to the switching device, and the other end of the second resistor is connected to the controlled terminal.
Optionally, the power supply further comprises a charging interface, and the charging interface is connected with the power supply connecting end.
In a second aspect, an embodiment of the present application provides an intelligent device, including:
the battery charging and discharging switching circuit of the intelligent device according to the first aspect of the embodiment of the present application.
In the embodiment of the application, the characteristic that both the forward direction and the reverse direction of the P-channel MOS tube can be conducted is utilized, the function of bidirectional circulation of the battery current is skillfully realized, the battery current only flows through the P-channel MOS tube, the internal resistance of the P-channel MOS tube is generally more than 10 milliohms, and the power consumption is low. The battery charging and discharging switching circuit of the intelligent equipment is simple in circuit structure, low in cost and applicable to various intelligent equipment with rechargeable batteries.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Drawings
Fig. 1 is a schematic diagram of a battery charge-discharge switching circuit of a smart device provided in an exemplary embodiment;
fig. 2 is a schematic diagram of a battery charge-discharge switching circuit of a smart device provided in an exemplary embodiment;
fig. 3 is a schematic diagram of a battery charge-discharge switching circuit of a smart device provided in an exemplary embodiment;
fig. 4 is a schematic diagram of a smart device provided in an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
To solve the technical problem mentioned in the background art, the embodiment of the application provides a battery charging and discharging switching circuit of an intelligent device, which is simple in structure and can conveniently realize charging and discharging switching of a battery.
As shown IN fig. 1, IN an exemplary embodiment, the battery charging/discharging switching circuit of the smart device of the present application includes a battery connection terminal VBAT, a power connection terminal VBAT _ IN, a P-channel MOS transistor Q2, a first voltage dividing circuit 1, and a conducting switch Q1, wherein the P-channel MOS transistor Q2 includes an IN-band diode.
The intelligent device can be an intelligent electronic device with a rechargeable battery, such as a mobile phone, a tablet personal computer or a computer, and can be used when the battery is independently powered, and also can be used when an external power supply is connected and the battery is charged.
The battery connection terminal VBAT is used for connecting a battery, and the power connection terminal VBAT _ IN is used for connecting an external power source, IN a specific example, as shown IN fig. 1, the power connection terminal VBAT _ IN is connected to a charging interface of the smart device through a charging circuit inside a hardware system of the smart device, wherein the charging interface may be a MICRO-USB interface, a TYPE-C interface, or the like.
The source S of the P-channel MOS tube is connected with the battery connecting end VBAT, the drain D of the P-channel MOS tube is connected with the power supply connecting end VBAT _ IN, the anode of the IN-vivo diode is connected with the drain D of the P-channel MOS tube, and the cathode of the IN-vivo diode is connected with the source S of the P-channel MOS tube.
The conducting switch Q1 includes a controlled end, a current input end IN and a current output end OUT, the current input end is connected with the gate G of the P-channel MOS transistor, the current output end is grounded, wherein the conducting switch Q1 may be a conducting element such as a triode or other transistor, and when the controlled end is at a high level, the conducting switch is conducted between the current input end and the current output end.
The first voltage dividing circuit 1 is used for voltage division, and in one example, the first voltage dividing circuit may be formed by one or more resistance elements. One end of the first voltage dividing circuit 1 is connected to the battery connection terminal VBAT, and the other end of the first voltage dividing circuit 1 is connected to the controlled terminal.
The working principle of the embodiment of the application is as follows:
1) when the battery has no electric quantity, the power adapter is inserted into the charging interface of the intelligent device, the charging circuit of the hardware system can charge the battery from the VBAT _ IN end of the hardware system through the inside of the hardware system, at the moment, the external power supply starts the conduction switch Q1 through the internal diode (namely the DS end of the P-channel MOS transistor Q2) of the P-channel MOS transistor Q2 after voltage division of the first voltage division circuit 1, so that the current input end and the current output end of the conduction switch Q1 are switched on, the P-channel MOS transistor Q2 is reversely switched on, and the charging function of the external power supply on the battery is realized.
2) When the power adapter inserted into the charging interface of the intelligent device is unplugged, or no external power supply is input from the VBUS end, and the intelligent device starts the system, the battery power passes through the VBAT and is switched on by the switch Q1 after voltage division of the first voltage division circuit 1, so that the current input end and the current output end of the switch Q1 are switched on, the P-channel MOS tube Q2 is switched on in the forward direction, and the power supply function of the battery to a hardware system is realized.
3) When the power adapter is plugged and unplugged, if the P-channel MOS tube Q2 is already conducted, only the direction of the current of the battery can be changed, and the use is not influenced.
In the embodiment of the application, the characteristic that both the forward direction and the reverse direction of the P-channel MOS tube can be conducted is utilized, the function of bidirectional circulation of the battery current is skillfully realized, the battery current only flows through the P-channel MOS tube, the internal resistance of the P-channel MOS tube is generally more than 10 milliohms, and the power consumption is low. The battery charging and discharging switching circuit of the intelligent equipment is simple in circuit structure, low in cost and applicable to various intelligent equipment with rechargeable batteries.
In the intelligent equipment, such a situation is often encountered, after the system is halted, the system cannot be operated, and power-off reset is required, but because the battery exists in the system, the battery of the existing intelligent equipment is often designed in an integrated manner, namely the battery cannot be taken out, so that the system must wait for the battery to be completely consumed, and then the system can be started after being recharged.
Therefore, in one embodiment, the battery charging and discharging switching circuit of the intelligent device further has a battery power-off reset function.
As shown in fig. 2, in an exemplary embodiment, the battery charging and discharging switching circuit of the smart device of the present application further includes a switching device K1;
one end of the switching device K1 is connected to the controlled end of the conducting switch Q1, and the other end of the switching device K1 is grounded.
Specifically, the switching device K1 may be a button switch having an automatic reset function, and is disposed on an outer surface of the smart device, specifically, on a side surface of the smart device.
In an embodiment, as shown in fig. 2, the battery charging/discharging switching circuit of the smart device of the present application further includes a second voltage divider circuit 2, where the second voltage divider circuit 2 is connected in series between the switching device K1 and the controlled terminal.
IN any of the above-mentioned use processes of the smart device, when the switching device K1 is closed, the voltage is divided from the first voltage dividing circuit 1 and the second voltage dividing circuit 2, and since the voltage is smaller than the on voltage of the on switch Q1, the on switch Q1 is turned off, so that the P-channel MOS transistor is also turned off, and the battery connection terminal VBAT and the power supply connection terminal VBAT _ IN network are disconnected, thereby implementing the power-off reset.
In a specific example, as shown in fig. 3, the conducting switch Q1 is an NPN transistor;
the controlled end is a base set of the triode, the current input end is a collector of the triode, and the current output end is an emitter of the triode.
In a specific example, as shown in fig. 3, the first voltage dividing circuit 1 includes a first resistor R1, one end of the first resistor R1 is connected to the battery connection terminal VBAT, and the other end of the first resistor is connected to the controlled terminal.
In a specific example, as shown in fig. 3, the second voltage dividing circuit 2 includes a second resistor R2, one end of the second resistor R2 is connected to the switching device K1, and the other end of the second resistor is connected to the controlled terminal.
As shown in fig. 4, an embodiment of the present application further provides a smart device, where the smart device has a battery charging and discharging switching circuit of the smart device in any of the embodiments.
The smart device of the present application may be a mobile phone, a tablet computer, a computer, or the like, which is an intelligent electronic device with a rechargeable battery, and in a specific example, the smart device is a mobile phone.
It is to be understood that the embodiments of the present application are not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the following claims.
The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application.
Claims (10)
1. The utility model provides a battery charge-discharge switching circuit of smart machine which characterized in that includes:
the power supply comprises a battery connecting end, a power supply connecting end, a P-channel MOS tube, a first voltage division circuit and a conducting switch, wherein the P-channel MOS tube is provided with an in-vivo diode;
the source electrode of the P-channel MOS tube is connected with the battery connecting end, the drain electrode of the P-channel MOS tube is connected with the power supply connecting end, the anode of the body diode is connected with the drain electrode of the P-channel MOS tube, and the cathode of the body diode is connected with the source electrode of the P-channel MOS tube;
the conducting switch comprises a controlled end, a current input end and a current output end, the current input end is connected with the grid electrode of the P-channel MOS tube, and the current output end is grounded;
one end of the first voltage division circuit is connected with the battery connecting end, and the other end of the first voltage division circuit is connected with the controlled end.
2. The battery charge-discharge switching circuit of the intelligent device according to claim 1, wherein:
also includes a switching device;
one end of the switching device is connected with the controlled end of the conducting switch, and the other end of the switching device is grounded.
3. The battery charge-discharge switching circuit of the intelligent device according to claim 2, wherein:
the switching device is a push button switch.
4. The battery charge-discharge switching circuit of the intelligent device according to claim 3, wherein:
the button switch is arranged on the side face of the intelligent device.
5. The battery charge-discharge switching circuit of the intelligent device according to claim 1, wherein:
the conducting switch is an NPN type triode;
the controlled end is a base set of the triode, the current input end is a collector of the triode, and the current output end is an emitter of the triode.
6. The battery charge-discharge switching circuit of the intelligent device according to claim 1, wherein:
the first voltage division circuit comprises a first resistor, one end of the first resistor is connected with the battery connecting end, and the other end of the first resistor is connected with the controlled end.
7. The battery charge-discharge switching circuit of the intelligent device according to claim 2, wherein:
the switch device further comprises a second voltage division circuit which is connected between the switch device and the controlled terminal in series.
8. The battery charge-discharge switching circuit of the intelligent device according to claim 7, wherein:
the second voltage division circuit includes a second resistor, one end of the second resistor is connected to the switching device, and the other end of the second resistor is connected to the controlled terminal.
9. The battery charge-discharge switching circuit of the smart device according to claim 1 or 2, wherein:
still including the interface that charges, the interface that charges with power connection end is connected.
10. A smart device, comprising:
the battery charge-discharge switching circuit of the smart device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230405.6A CN112383105A (en) | 2020-11-06 | 2020-11-06 | Battery charging and discharging switching circuit of intelligent equipment and intelligent equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230405.6A CN112383105A (en) | 2020-11-06 | 2020-11-06 | Battery charging and discharging switching circuit of intelligent equipment and intelligent equipment |
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| Publication Number | Publication Date |
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| CN112383105A true CN112383105A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011230405.6A Pending CN112383105A (en) | 2020-11-06 | 2020-11-06 | Battery charging and discharging switching circuit of intelligent equipment and intelligent equipment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120056592A1 (en) * | 2010-09-08 | 2012-03-08 | Atsushi Sakurai | Charge/discharge control circuit and battery device |
| CN203278309U (en) * | 2013-05-06 | 2013-11-06 | 深圳Tcl新技术有限公司 | Circuit and device for switching on/off charging battery |
| CN105529816A (en) * | 2014-09-29 | 2016-04-27 | 中兴通讯股份有限公司 | Method and device for power source switching, and hand-held terminal |
| CN207368744U (en) * | 2017-09-15 | 2018-05-15 | 深圳市亿道数码技术有限公司 | Power supply power switching circuit |
| CN210478445U (en) * | 2019-07-26 | 2020-05-08 | 国网山东省电力公司电力科学研究院 | Electric automobile energy management system suitable for V2G |
-
2020
- 2020-11-06 CN CN202011230405.6A patent/CN112383105A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120056592A1 (en) * | 2010-09-08 | 2012-03-08 | Atsushi Sakurai | Charge/discharge control circuit and battery device |
| CN203278309U (en) * | 2013-05-06 | 2013-11-06 | 深圳Tcl新技术有限公司 | Circuit and device for switching on/off charging battery |
| CN105529816A (en) * | 2014-09-29 | 2016-04-27 | 中兴通讯股份有限公司 | Method and device for power source switching, and hand-held terminal |
| CN207368744U (en) * | 2017-09-15 | 2018-05-15 | 深圳市亿道数码技术有限公司 | Power supply power switching circuit |
| CN210478445U (en) * | 2019-07-26 | 2020-05-08 | 国网山东省电力公司电力科学研究院 | Electric automobile energy management system suitable for V2G |
Non-Patent Citations (1)
| Title |
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| 潘永雄, 西安电子科技大学出版社 * |
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Application publication date: 20210219 |