CN208656454U - Charging circuit and its electronic device - Google Patents
Charging circuit and its electronic device Download PDFInfo
- Publication number
- CN208656454U CN208656454U CN201821211448.8U CN201821211448U CN208656454U CN 208656454 U CN208656454 U CN 208656454U CN 201821211448 U CN201821211448 U CN 201821211448U CN 208656454 U CN208656454 U CN 208656454U
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- Prior art keywords
- circuit board
- battery
- connector
- internal battery
- charging circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a kind of charging circuit and its electronic devices.The charging circuit includes: main circuit board, sub-circuit board and internal battery；The main circuit board is for providing the system function of the electronic device；The charging circuit for being provided with the USB interface for connecting external power adapter on the sub-circuit board and charging to the internal battery；The internal battery is electrically connected with the main circuit board and the sub-circuit board respectively；Wherein, external power supply charges by the sub-circuit board to the internal battery；The internal battery provides system power supply directly to the main circuit board.This programme can promote the charge efficiency that external power supply charges to the internal battery under the premise of not influencing internal battery power supply efficiency, reduce low-pressure direct and fill the security risk under state.
Description
[technical field]
The utility model relates to electroporation field more particularly to a kind of charging circuits and its electronic device.
[background technique]
The smart terminal product of the charged pools such as smart phone, plate, projector is at present in order to constantly meet products-hardware
Demand, battery capacity are also increasing.Therefore also more and more intelligent terminals support fast charge technology to shorten the charging time.
Higher requirement is proposed to the charging circuit design of this electronic product as a result,.
As shown in Figure 1, in smart terminal product at present common charging circuit include: internal battery, mainboard, daughter board and
Connect the FPC (Flexible Printed Circuit, flexible circuit board) of the mainboard and daughter board.The internal battery only one
A connector is arranged on the protection board for protection board.In the scheme of Fig. 1, which is electrically connected with mainboard.For charging
USB interface be set on the daughter board, the internal battery connect with the mainboard provide system power supply.Then give the charging of internal battery
Path is very long, and Yao Jingli: then USB interface, daughter board, flexible circuit board, mainboard could charge to internal battery.It should
There are multiple connectors among path, larger impedance can be generated, influence charge efficiency, especially in the environment of electric current charges, such as
It is filled using low-pressure direct in the product of high current scheme, larger impedance causes fire etc. it is also possible to the device in circuit can be burnt
Security risk.Therefore, many devices require to customize, increased costs, and reliability reduces.
As a result, as shown in Fig. 2, in another technical solution, the internal battery by the connector on protection board directly with
Daughter board electrical connection.When charging, it can only be charged to internal battery with after USB interface, daughter board.But in such cases, should
The path needed when internal battery provides a system to power supply is elongated again, increases the power consumption in power supply process, reduces battery working efficiency,
Shorten the stand-by time of the electronic product.
[utility model content]
The technical problems to be solved in the utility model be can be promoted charge efficiency when charging to internal battery and
The charging circuit and its electronic device of the service efficiency of the internal battery are not reduced.
In order to solve the above technical problems, the utility model the following technical schemes are provided:
On the one hand, the utility model provides a kind of charging circuit, is used for electronic device, wherein the charging circuit includes: master
Circuit board, sub-circuit board and internal battery；The main circuit board is for providing the system function of the electronic device；The sub-circuit board
On the charging circuit that is provided with the USB interface for connecting external power adapter and charges to the internal battery；
The internal battery is electrically connected with the main circuit board and the sub-circuit board respectively；Wherein, external power supply is given by the sub-circuit board and is somebody's turn to do
Internal battery charging；The internal battery provides system power supply directly to the main circuit board.
On the other hand, the utility model provides a kind of electronic device, wherein the electronic device includes above-mentioned any one institute
The charging circuit stated.
The beneficial effects of the utility model are that charge path is very short, and connector quantity is also less, greatly reduces
Impedance in entire charge path can effectively promote charge efficiency, reduce the risk or loss under high current working condition.
Meanwhile it is also shorter to the path of system power supply, power supply efficiency can't because of charge path shortening and decline.I.e., it is possible to
Under the premise of not influencing internal battery power supply efficiency, the charge efficiency that external power supply charges to the internal battery is promoted, is reduced
Low-pressure direct fills the security risk under state.
[Detailed description of the invention]
Fig. 1 is a kind of charging circuit configuration schematic diagram in the prior art.
Fig. 2 is another charging circuit configuration schematic diagram in the prior art.
Fig. 3 is a kind of circuit diagram that the specific embodiment of charging circuit provides of the utility model.
Fig. 4 is the circuit diagram of internal battery in Fig. 3.
[specific embodiment]
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.But the utility model can be realized in many different forms, and
It is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes in the disclosure to the utility model
The understanding of appearance is more thorough and comprehensive.
Unless otherwise defined, this paper practical all technical and scientific terms are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that limitation the utility model.Term as used herein "and/or" includes one
Any and all combinations of a or multiple relevant listed items." connecting between the circuit original part being previously mentioned in the application
Connect ", including it is directly connected to, also includes via the situations such as being indirectly connected with after other components.
Please refer to Fig. 3, the electrical block diagram that a kind of specific embodiment of charging circuit of the utility model provides.
The charging circuit includes: main circuit board 10, sub-circuit board 20 and internal battery 30.
The system function circuit of electronic device is set on the main circuit board 10, realizes the various functions of intelligent terminal demand.
Those skilled in the art can realize foregoing circuit or function using the prior art, herein according to the demand of the electronic product
It does not repeat one by one.
Setting is for connecting the USB interface 21 of external power adapter and to the internal battery 30 on the sub-circuit board 20
The charging circuit 22 to charge.Those of skill in the art can obtain the specific of the charging circuit 22 according to the prior art
Circuit structure is not described in detail then at this.
The internal battery 30 is electrically connected with the main circuit board 10 and the sub-circuit board 20 respectively；
Wherein, external power supply charges by the sub-circuit board 20 to the internal battery 30；The internal battery 30 is directly to this
Main circuit board 10 provides system power supply.
Specifically, the internal battery 30 includes: the first battery protecting plate 31, the second battery protecting plate 32, battery core 33, sets
The first connector 311 being placed on first battery protecting plate 31, the second connection being set on second battery protecting plate 32
Device 321 and battery core 33.First battery protecting plate 31, second battery protecting plate 32 are electrically connected with the battery core 33 respectively.It should
Internal battery 30 is electrically connected with main circuit board 10, sub-circuit board 20 respectively by first connector 311, second connector 321
It connects.
When needing to charge to the internal battery 30, external power supply is by filling on the USB interface 21, the sub-circuit board 20
Circuit 22 and second connector 321 charge to the internal battery 30.Optimization, which is fast charge circuit.
When the electronic device functions, which directly gives the main circuit board 10 by first connector 311
System power supply is provided.
It can be seen that charge path is very short in specific embodiment provided by the utility model, and connector quantity also compared with
It is few, the impedance in entire charge path is greatly reduced, charge efficiency can be effectively promoted, reduce high current working condition
Under risk or loss.But it is also shorter to the path of system power supply, power supply efficiency can't be because of the shortening of charge path
And decline.That is, specific embodiment provided by the utility model, can under the premise of not influencing internal battery power supply efficiency,
The charge efficiency that external power supply charges to the internal battery is promoted, low-pressure direct is reduced and fills the security risk under state.
Continuing with reference to Fig. 4, the circuit theory schematic diagram of the internal battery.
First battery protecting plate 31 includes: the first control chip U1, switching tube Q1 and Q2, the first connector 311.When
When one control chip U1 knows that charging current is higher than preset threshold value, then exports electric signal and controls switching tube Q1 and Q2 cut-off,
That is, being disconnected being electrically connected between the first connector 311 and the battery core 33, play the role of overcharging protection.Specifically, this first
Controlling chip U1 is that the charging current (not shown) is obtained from first battery protecting plate 31.Specifically, first control
The detection foot of coremaking piece U1 is used to identify the voltage on first battery protecting plate 31.Electric current is bigger, and voltage is bigger, when voltage is super
Crossing threshold value is that just mark electric current is more than design requirement.
Specifically, switching tube Q1 and Q2 are connected in series in the power supply of the anode and first connector 311 of the battery core 33
Between input terminal.The grid of switching tube Q1 and Q2 is respectively electrically connected to two output ends of first control chip U1.This
The power end of one control chip U1 is connected to the anode of the battery core 33.The cathode of the battery core 33 is connected to first connector 311
Ground terminal.
Alternatively, second battery protecting plate 32 includes: the second control chip U2, switching tube Q3 and Q4, the second connector
321.When second control chip U2 know charging current be higher than preset threshold value when, then export electric signal control switching tube Q3 and
Q4 cut-off, that is, be disconnected being electrically connected between the second connector 321 and the battery core 33, play the role of overcharging protection.Specifically
, second control chip U2 is that the charging current (not shown) is obtained from second battery protecting plate 32.Specifically
, the detection foot of second control chip U2 is used to identify the voltage on second battery protecting plate 32.Electric current is bigger, and voltage is got over
It greatly, is that just mark electric current is more than design requirement when voltage is more than threshold value.
Specifically, switching tube Q3 and Q4 are connected in series in the power supply of the anode and second connector 321 of the battery core 33
Between input terminal.The grid of switching tube Q3 and Q4 is respectively electrically connected to two output ends of second control chip U2.This
The power end of two control chip U2 is connected to the anode of the battery core 33.The cathode of the battery core 33 is connected to second connector 321
Ground terminal.
Specifically, above-mentioned switching tube Q1, Q2, Q3 and Q4 can select nomotron, as triode, MOSFET are managed
Deng.Power supply chip, such as MM3734 can be used in above-mentioned first control chip U1, the second control chip U2.
In specific embodiment provided by the utility model, set on the first battery protecting plate or the second battery protecting plate
Switching tube is set, being switched off and on for the switching tube is controlled according to the charging current of feedback, to guarantee, in charging current mistake
When big, the access between external power supply and internal battery is disconnected, alternatively, the access between breaking inner power supply and mainboard, thus
Guarantee that the charging circuit or electronic device will not be damaged because crossing current charge.
Above-mentioned specific embodiment illustrates but is not intended to limit the utility model, and those skilled in the art can be in claim
In the range of design it is multiple replace example.Those skilled in the art, which should be appreciated that, to be violated to no as appended
Within the scope of the utility model as defined in the claims, specific implementation can be made it is appropriate adjustment, modification etc..
Therefore, all according to the spirit and principles of the utility model, any modifications and variations done are determined in the appended claims
Within the scope of the utility model of justice.
Claims (9)
1. a kind of charging circuit, be used for electronic device, which is characterized in that the charging circuit include: main circuit board, sub-circuit board with
And internal battery；
The main circuit board is for providing the system function of the electronic device；
It is provided with the USB interface for connecting external power adapter on the sub-circuit board and is filled to the internal battery
The charging circuit of electricity；
The internal battery is electrically connected with the main circuit board and the sub-circuit board respectively；
Wherein, external power supply charges by the sub-circuit board to the internal battery；The internal battery is mentioned directly to the main circuit board
For system power supply.
2. charging circuit as described in claim 1, which is characterized in that the internal battery specifically includes:
First battery protecting plate, the second battery protecting plate, battery core, the first connector being set on first battery protecting plate,
The second connector being set on second battery protecting plate；
First battery protecting plate, second battery protecting plate are electrically connected with the battery core respectively；
The internal battery is electrically connected with the main circuit board, the sub-circuit board respectively by first connector, second connector；
Wherein, external power supply charges by the USB interface, the charging circuit and second connector to the internal battery；It should
Internal battery provides system power supply to the main circuit board by first connector.
3. charging circuit as claimed in claim 2, which is characterized in that first battery protecting plate includes: the first control chip
U1, switching tube Q1 and Q2, the first connector；It is when the first control chip knows that charging current is higher than preset threshold value, then defeated
Electric signal controls switching tube Q1 and Q2 cut-off out.
4. charging circuit as claimed in claim 3, it is characterised in that；
Switching tube Q1 and Q2 is connected in series between the anode of the battery core and the power input of first connector；
The grid of switching tube Q1 and Q2 is respectively electrically connected to two output ends of the first control chip；
The power end of first control chip U1 is connected to the anode of the battery core；
The cathode of the battery core is connected to the ground terminal of first connector.
5. charging circuit as claimed in claim 2, which is characterized in that second battery protecting plate include: the second control chip,
Switching tube Q3 and Q4, the second connector；When the second control chip knows that charging current is higher than preset threshold value, then telecommunications is exported
Number control switching tube Q3 and Q4 cut-off.
6. charging circuit as claimed in claim 5, it is characterised in that；
Switching tube Q3 and Q4 is connected in series between the anode of the battery core and the power input of second connector；
The grid of switching tube Q3 and Q4 is respectively electrically connected to two output ends of the second control chip；
The power end of the second control chip is connected to the anode of the battery core；
The cathode of the battery core is connected to the ground terminal of second connector.
7. the charging circuit as described in any one of claim 3 to 6 claim, it is characterised in that: switching tube Q1,
Q2, Q3 and Q4 are nomotron.
8. charging circuit as claimed in claim 7, it is characterised in that: the nomotron is that triode or MOSFET are managed.
9. a kind of electronic device, which is characterized in that the electronic device includes filling as described in any one of claim 1 to 6
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821211448.8U CN208656454U (en) | 2018-07-27 | 2018-07-27 | Charging circuit and its electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821211448.8U CN208656454U (en) | 2018-07-27 | 2018-07-27 | Charging circuit and its electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208656454U true CN208656454U (en) | 2019-03-26 |
Family
ID=65787612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821211448.8U Active CN208656454U (en) | 2018-07-27 | 2018-07-27 | Charging circuit and its electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208656454U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111082493A (en) * | 2019-12-31 | 2020-04-28 | Oppo广东移动通信有限公司 | Terminal device |
| CN111682607A (en) * | 2020-06-05 | 2020-09-18 | Oppo（重庆）智能科技有限公司 | Charging structure and electronic equipment |
| CN111969168A (en) * | 2019-05-20 | 2020-11-20 | Oppo广东移动通信有限公司 | Battery pack and electronic device |
-
2018
- 2018-07-27 CN CN201821211448.8U patent/CN208656454U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111969168A (en) * | 2019-05-20 | 2020-11-20 | Oppo广东移动通信有限公司 | Battery pack and electronic device |
| CN111082493A (en) * | 2019-12-31 | 2020-04-28 | Oppo广东移动通信有限公司 | Terminal device |
| WO2021135949A1 (en) * | 2019-12-31 | 2021-07-08 | Oppo广东移动通信有限公司 | Terminal device |
| CN111082493B (en) * | 2019-12-31 | 2024-05-24 | Oppo广东移动通信有限公司 | Terminal Equipment |
| CN111682607A (en) * | 2020-06-05 | 2020-09-18 | Oppo（重庆）智能科技有限公司 | Charging structure and electronic equipment |
| CN111682607B (en) * | 2020-06-05 | 2022-09-06 | Oppo（重庆）智能科技有限公司 | Charging structure and electronic equipment |
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