CN106532860A - Charging circuit and electronic device provided with charging circuit - Google Patents
Charging circuit and electronic device provided with charging circuit Download PDFInfo
- Publication number
- CN106532860A CN106532860A CN201611235638.9A CN201611235638A CN106532860A CN 106532860 A CN106532860 A CN 106532860A CN 201611235638 A CN201611235638 A CN 201611235638A CN 106532860 A CN106532860 A CN 106532860A
- Authority
- CN
- China
- Prior art keywords
- battery
- cpu
- charging
- switch module
- metal
- 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
- 239000004065 semiconductor Substances 0.000 claims description 42
- 230000001012 protector Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 7
- 229910044991 metal oxide Inorganic materials 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H02J7/0091—
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charging protection circuit which is used for protecting a battery when the battery is connected with a charging device for charging. The charging protection circuit comprises a switch module, a CPU (Central Processing Unit), a current protection module and a temperature protection module, wherein the switch module is connected between the charging device and the battery; the CPU is connected with the switch module, and controls the charging device to start or stop providing charging current for the battery by the switch module; the current protection module is connected between the charging device and the battery; when the charging current is greater than the preset current, the current protection module is disconnected to control the charging device to stop providing the charging current for the battery; the temperature protection module is connected with the CPU, and used for sensing temperature change around the switch module; and the CPU adjusts the magnitude of the charging current according to the temperature change. The invention further provides an electronic device provided with the charging circuit.
Description
Technical field
The present invention relates to electronic circuit field, and in particular to a kind of charging circuit and the dress of the electronics with the charging circuit
Put.
Background technology
Fig. 1 is referred to, at present, it is by two connected MOS (Metal mostly that the low pressure of electronic installation fills scheme soon
Oxide Semiconductor, metal-oxide semiconductor (MOS)) pipe is by the VBAT inputs of the VBUS outfans of charger and battery
It is directly connected to.The CPU (Central Processing Unit, central processing unit) of electronic installation can be charged by metal-oxide-semiconductor control
The break-make of circuit, is charged control.In charging process, the heat of metal-oxide-semiconductor is more concentrated, and temperature is higher, the existing side of filling soon
Case is not monitored to its temperature, it is impossible to carry out temperature protection to which.In addition, existing electronic installation is typically filled in battery-end detecting
Electric current, then the detecting data of battery-end is sent to into CPU, judge it is whether charging current is abnormal and different in charging current by CPU
Chang Shi, control metal-oxide-semiconductor disconnect charging circuit, however, above-mentioned control process is longer, it is impossible to enough disconnected when charging current is abnormal in real time
Open charging circuit.
The content of the invention
In view of the foregoing, it is necessary to which a kind of current protection electricity for having temperature protection and real-time current defencive function concurrently is provided
Road.
In addition, it is necessary to which a kind of electronic installation with the charging circuit is provided.
A kind of charge protector, for when battery is connected to charging device and is charged, providing protection to the battery,
The charge protector includes：
Switch module, the switch module are connected between the charging device and the battery；
CPU (Central Processing Unit, central processing unit), the CPU is connected with the switch module, and the CPU leads to
Crossing the switch module and controlling the charging device start or stop charging current being provided to the battery；
Overcurrent protection module, the overcurrent protection module are connected between the charging device and the battery, when the charging current
During more than predetermined current, the overcurrent protection module disconnects, and stops providing the charging current to the battery to control the charging device；
Temperature protection module, the temperature protection module are connected with the CPU, for sensing the change of the temperature around the switch module
Change, the CPU adjusts the charging current according to the temperature change.
According to one preferred embodiment of the present invention, the overcurrent protection module is resettable fuse, is protected when the self- recoverage is flow through
When the charging current of dangerous silk exceedes predetermined current, the resettable fuse open circuit, when the charging electricity for flowing through the resettable fuse
When stream is less than predetermined current, then resettable fuse returns to conducting state.
According to one preferred embodiment of the present invention, the temperature protection module includes critesistor and the divider resistance connected, should
The critesistor of series connection and divider resistance one end ground connection, other end connection power supply, have between the critesistor and the divider resistance
There is node, the node is connected with the CPU, the temperature change around the switch module, the voltage at the critesistor two ends occur
Corresponding to change, the CPU adjusts the size of the charging current according to the change in voltage.
According to one preferred embodiment of the present invention, the critesistor is to seal in positive temperature coefficient resistor, be incorporated to negative temperature system
Number resistance and using seal in positive temperature coefficient resistor while be incorporated to negative temperature coefficient resister compound mode any one.
According to one preferred embodiment of the present invention, the switch module includes a MOS (Metal Oxide
Semiconductor, metal-oxide semiconductor (MOS)) to manage and the second metal-oxide-semiconductor, the grid of first metal-oxide-semiconductor is connected with the CPU, is leaked
Pole is connected with the charging device, and source electrode is connected with the drain electrode of second metal-oxide-semiconductor, and the grid of second metal-oxide-semiconductor is connected with the CPU,
Source electrode is connected with the battery.
A kind of electronic installation, its charge protector for including battery and being connected with the battery, the charge protector bag
Include：Switch module, the switch module are connected between the charging device and the battery；CPU(Central Processing
Unit, central processing unit), the CPU is connected with the switch module, and the CPU controls the charging device by the switch module and starts
Or stop providing charging current to the battery；Overcurrent protection module, the overcurrent protection module are connected to the charging device and are somebody's turn to do
Between battery, when the charging current is more than predetermined current, the overcurrent protection module disconnects, with control the charging device stop to
The battery provides the charging current；Temperature protection module, the temperature protection module are connected with the CPU, for sensing the switching molding
Temperature change around block, the CPU adjust the charging current according to the temperature change.
Compared to prior art, the charge protector of the present invention can be disconnected in time when the charging current is excessive should
The connection of charging device and the battery, so as to protect battery and other devices to avoid which from burning out because electric current is excessive；Meanwhile, this fills
Electric protection circuit can also sense the temperature change of the switch module, and the charging current is adjusted, the switch module is prevented
Temperature is excessive.
Description of the drawings
It is the circuit diagram of the charging circuit of prior art shown in Fig. 1.
It is the circuit diagram of the electronic installation with charge protector of present pre-ferred embodiments shown in Fig. 2.
Main element symbol description
Electronic installation 1
Battery 10
Charge protector 30
Switch module 31
First metal-oxide-semiconductor Q1
Second metal-oxide-semiconductor Q2
Grid G
Drain D
Source S
CPU 33
Overcurrent protection module 35
First resistor R1
Second resistance R2
Temperature protection module 37
Critesistor R1
Divider resistance R2
Node N
Power supply Vmos
Charging device 2
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is purged, complete
Site preparation is described, it is clear that described embodiment a part of embodiment only of the invention, rather than the embodiment of whole.
Based on the embodiment in the present invention, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
With reference to shown in Fig. 2, it is the circuit diagram of the electronic installation 100 of present pre-ferred embodiments.The electronic installation 1 includes electricity
Pond 10 and the charge protector 30 being connected with the battery 10, the charge protector 30 is for being connected to charging in the battery 10
When device 2 is charged, protection is provided to the battery 10.
The charge protector 30 includes that (Central Processing Unit, central authorities are processed switch module 31, CPU
Device) 33, overcurrent protection module 35 and temperature protection module 37.
The switch module 31 is connected between the charging device 200 and the battery 10.The CPU 33 and the switch module 31
It is connected, the CPU 33 controls the charging device 2 by the switch module 31 and starts or stop to provide the electricity that charges to the battery 10
Stream.
In this preferred embodiment, the switch module 31 includes a MOS (Metal Oxide Semiconductor, gold
Category oxide semiconductor) pipe Q1 and the second metal-oxide-semiconductor Q2.In this preferred embodiment, the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2
It is P-channel enhancement type metal-oxide-semiconductor.The grid G of first metal-oxide-semiconductor Q1 is connected with the CPU 33, drain D and 2 phase of charging device
Even, source S is connected with the source S of second metal-oxide-semiconductor Q2, and the grid G of second metal-oxide-semiconductor Q2 is connected with the CPU 33, drain D and
The battery 10 is connected.
The overcurrent protection module 35 is connected between the charging device 2 and the battery 10, when the charging current is more than default
During electric current, the overcurrent protection module 35 disconnects, and stops providing the charging current to the battery 10 to control the charging device 2.
In this preferred embodiment, the overcurrent protection module 35 is resettable fuse, when the charging current for flowing through the resettable fuse
During more than predetermined current, the resettable fuse open circuit, to disconnect the connection of the charging device 2 and the battery 10；When flowing through this
When the charging current of resettable fuse is less than predetermined current, then resettable fuse returns to conducting state, is filled with recovering this
The connection of electric installation 2 and the battery 10.
The temperature protection module 37 is connected with the CPU 33, for sensing the temperature change around the switch module 31, should
CPU 33 adjusts the charging current according to the temperature change.In this preferred embodiment, the temperature protection module 37 includes
The critesistor R1 and divider resistance R3 of series connection, critesistor R1 and divider resistance R2 one end ground connection of the series connection, the other end connect
Power supply Vmos is met, there is between critesistor R1 and the divider resistance R2 node N, node N is connected with the CPU 33, when this
Temperature change around the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 of switch module 31, the voltage at critesistor R1 two ends are sent out
Raw corresponding change, the CPU 33 adjust the size of the charging current according to the change in voltage.
It is appreciated that the critesistor R1 for seal in PTC (Positive Temperature Coefficient, just
Temperature coefficient) resistance, it is incorporated to NTC negative temperature coefficients (Negative Temperature Coefficient, negative temperature coefficient)
Resistance and using seal in PTC resistor while be incorporated to NTC resistance compound mode any one.
When the battery 10 is connected to the charging device 2 to be charged, the CPU 33 controls the first metal-oxide-semiconductor Q1 and second
Metal-oxide-semiconductor Q2 is turned on, and charging current Jing the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 enter to the battery 10.If charging process
In, there is exception in the charging current, and during more than predetermined current, the blown fuse, to disconnect the charging device 2 and the battery
10 connection.In addition, when the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 temperature are raised, the resistance value of critesistor R1 is reduced, section
The voltage of point N is also accordingly reduced, and the CPU 33 adjusts charging current according to the change in voltage, it is to avoid the first metal-oxide-semiconductor Q1
And second metal-oxide-semiconductor Q2 constant temperature it is too high, so as to electronic installation 1 provide temperature protection.
The charge protector 30 of the present invention can disconnect the charging device 2 and be somebody's turn to do when the charging current is excessive in time
The connection of battery 10, so as to protect battery 10 and other devices to avoid which from burning out because electric current is excessive；Meanwhile, the charge protection electricity
Road 30 can also sense the temperature change of the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2, and the charging current is adjusted, this is prevented
The temperature of the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 is excessive.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as and limit involved claim.This
Outward, it is clear that " including " word is not excluded for other units or, odd number is not excluded for plural number.The multiple units stated in system claims
Or device can also be realized by software or hardware by a unit or device.The first, the second grade word is used for representing name
Claim, and be not offered as any specific order.
Finally it should be noted that above example is only to illustrate technical scheme and unrestricted, although reference
Preferred embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the present invention's
Technical scheme is modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention.
Claims (6)
1. a kind of charge protector, for when battery is connected to charging device and is charged, providing protection to the battery, its
It is characterised by, the charge protector includes：
Switch module, the switch module are connected between the charging device and the battery；
CPU (Central Processing Unit, central processing unit), the CPU is connected with the switch module, and the CPU is by being somebody's turn to do
Switch module controls the charging device and starts or stop to provide charging current to the battery；
Overcurrent protection module, the overcurrent protection module are connected between the charging device and the battery, when the charging current is more than
During predetermined current, the overcurrent protection module disconnects, and stops providing the charging current to the battery to control the charging device；
Temperature protection module, the temperature protection module are connected with the CPU, for sensing the temperature change around the switch module,
The CPU adjusts the charging current according to the temperature change.
2. charge protector as claimed in claim 1, it is characterised in that the overcurrent protection module is resettable fuse,
When the charging current for flowing through the resettable fuse exceedes predetermined current, resettable fuse open circuit, when flowing through this from extensive
When the charging current of double insurance silk is less than predetermined current, then resettable fuse returns to conducting state.
3. charge protector as claimed in claim 1, it is characterised in that the temperature protection module includes the temperature-sensitive electricity connected
Resistance and divider resistance, the critesistor of the series connection and divider resistance one end ground connection, the other end connection power supply, the critesistor with should
There is between divider resistance node, the node is connected with the CPU, the temperature change around the switch module, the critesistor
There is corresponding change in the voltage at two ends, the CPU adjusts the size of the charging current according to the change in voltage.
4. charge protector as claimed in claim 3, it is characterised in that the critesistor is to seal in positive temperature coefficient electricity
Hinder, be incorporated to negative temperature coefficient resister and using the combination side that negative temperature coefficient resister is incorporated to while sealing in positive temperature coefficient resistor
Formula any one.
5. charge protector as claimed in claim 1, it is characterised in that the switch module includes a MOS (Metal
Oxide Semiconductor, metal-oxide semiconductor (MOS)) manage and the second metal-oxide-semiconductor, the grid of first metal-oxide-semiconductor and the CPU phases
Even, drain electrode is connected with the charging device, and source electrode is connected with the source electrode of second metal-oxide-semiconductor, the grid of second metal-oxide-semiconductor and the CPU
It is connected, drain electrode is connected with the battery.
6. a kind of electronic installation, its charge protector for including battery and being connected with the battery, it is characterised in that the charger
Protection circuit is the charge protector described in claim the 1-5 item any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611235638.9A CN106532860A (en) | 2016-12-28 | 2016-12-28 | Charging circuit and electronic device provided with charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611235638.9A CN106532860A (en) | 2016-12-28 | 2016-12-28 | Charging circuit and electronic device provided with charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106532860A true CN106532860A (en) | 2017-03-22 |
Family
ID=58339075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611235638.9A Pending CN106532860A (en) | 2016-12-28 | 2016-12-28 | Charging circuit and electronic device provided with charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106532860A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186859A (en) * | 2020-10-14 | 2021-01-05 | 上海畅联智融通讯科技有限公司 | Mobile terminal and charging circuit thereof |
| CN113765185A (en) * | 2021-09-09 | 2021-12-07 | 上海稊米汽车科技有限公司 | Constant-current charging circuit for super capacitor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080019447A (en) * | 2006-08-28 | 2008-03-04 | 삼성에스디아이 주식회사 | Battery pack |
| CN201812899U (en) * | 2010-08-05 | 2011-04-27 | 惠州Tcl移动通信有限公司 | Circuit for preventing over-high temperature during battery charging and battery thereof |
| CN103186109A (en) * | 2011-12-31 | 2013-07-03 | 比亚迪股份有限公司 | Control system for electric automobile and electric automobile with same |
| CN205646919U (en) * | 2016-05-12 | 2016-10-12 | 广州泓淮能源科技有限公司 | Distribution communication box holds battery life extension fixture |
-
2016
- 2016-12-28 CN CN201611235638.9A patent/CN106532860A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080019447A (en) * | 2006-08-28 | 2008-03-04 | 삼성에스디아이 주식회사 | Battery pack |
| CN201812899U (en) * | 2010-08-05 | 2011-04-27 | 惠州Tcl移动通信有限公司 | Circuit for preventing over-high temperature during battery charging and battery thereof |
| CN103186109A (en) * | 2011-12-31 | 2013-07-03 | 比亚迪股份有限公司 | Control system for electric automobile and electric automobile with same |
| CN205646919U (en) * | 2016-05-12 | 2016-10-12 | 广州泓淮能源科技有限公司 | Distribution communication box holds battery life extension fixture |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186859A (en) * | 2020-10-14 | 2021-01-05 | 上海畅联智融通讯科技有限公司 | Mobile terminal and charging circuit thereof |
| CN113765185A (en) * | 2021-09-09 | 2021-12-07 | 上海稊米汽车科技有限公司 | Constant-current charging circuit for super capacitor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170322 |