CN109361249A - The charger of automatically cutting off power source - Google Patents
The charger of automatically cutting off power source Download PDFInfo
- Publication number
- CN109361249A CN109361249A CN201811309271.XA CN201811309271A CN109361249A CN 109361249 A CN109361249 A CN 109361249A CN 201811309271 A CN201811309271 A CN 201811309271A CN 109361249 A CN109361249 A CN 109361249A
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- CN
- China
- Prior art keywords
- module
- circuit
- charger
- electrically connected
- current
- 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.)
- Withdrawn
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- 238000001514 detection method Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000005070 sampling Methods 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 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
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H02J7/027—
-
- 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 discloses a kind of chargers of automatically cutting off power source, including power input, on or off module, charging voltage and current conversion module, rechargeable battery, sampling module and comparison process module, the sampling module includes voltage detection module and current detection module, the wherein power input, on or off module, charging voltage and current conversion module, rechargeable battery is successively electrically connected, the input terminal of the voltage detection module and current detection module and the charging voltage and current conversion module output end are electrically connected, the output end of the voltage detection module and current detection module and the comparison process module input terminal are electrically connected, the output end of the comparison process module and the on or off module are electrically connected.The present invention turns off the function of light source of charger by voltage detection module, current detection module and comparison process module when realizing the power supply and charger short circuit of shutdown charger when rechargeable battery is fully charged.
Description
Technical field
The present invention relates to electronic circuit field, in particular to a kind of charger of automatically cutting off power source.
Background technique
Traditional charger can only carry out simple constant pressure or constant-current charge, so that the charging time is very long, charge efficiency
It reduces.In addition to this, at the end of charging, traditional charger cannot automatically power off after battery is full of, people often forget by
Charger is pulled up so as to cause accumulator super-charge, its service life is influenced, and can will more very generate explosion phenomenon, directly scrap.Closely
It is also proposed that some chargers automatically powered off with defencive function over year.
Chinese invention patent CN107919702A, date of publication are to disclose a kind of timing charger on April 17th, 2018, are wrapped
Include that external power supply, transformer, control module, current detection circuit, external power supply is used described in voltage detecting circuit and electronic switch
In providing power supply for control module；The control module, for judging whether rechargeable battery is charging with whether electricity is full of；
The transformer connects between external power supply and control module, and the supply voltage of external power supply is converted to suitable control module
Voltage；The current detection circuit, is electrically connected with control module, for whether having electric current flowing and electric current in detection circuit
It is whether too high or too low；The voltage detecting circuit, is electrically connected with control module, for being to have voltage in detection circuit, with
And whether voltage is too high or too low；The electronic switch, one end are electrically connected with control module, and the other end connects charging by data line
Battery, for disconnecting the circuit between control module and battery；Further include be connected to the control module timer, display module and
Relay；The timer, for recording the charging time of rechargeable battery；The display module, for electric current in display circuit,
Voltage swing and charging time；The relay, is electrically connected with control module, for protecting rechargeable battery not to be damaged.
Above-mentioned timing charger is by current detection circuit, voltage detecting circuit and control module, when the electric current in circuit
Or overtension, to prevent circuit to be burned, controller module can drive relay to disconnect, to protect supplying cell not burnt
It is bad；When the charger data line other end does not connect electronic equipment, the current or voltage in circuit is too low, and controller module can be recognized
There is no the rechargeable battery of electron equipment to charge for charger, then drives electronic switch to disconnect, data line is in off-position, from
And effectively prevent child from phenomenon of getting an electric shock occurring because data line to be put into mouth.
Although timing charger can disconnect the circuit connection of rechargeable battery and charger when rechargeable battery is fully charged,
It is charger and power supply there is also connection, there are power consumptions, while also bringing security risk when charger short circuit itself, such as produce
Raw explosion phenomenon jeopardizes life property safety.
Summary of the invention
The technical problem to be solved in the present invention is to provide one kind energy when rechargeable battery is fully charged or when charger short circuit
Turn off the charger of light source of charger.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is as follows:
A kind of charger of automatically cutting off power source, it is characterised in that: including power input, on or off module, charging
Voltage current transformation module, rechargeable battery, sampling module and comparison process module, the sampling module include voltage detection module
And current detection module, wherein the power input, on or off module, charging voltage and current conversion module, rechargeable battery
It is successively electrically connected, the input terminal of the voltage detection module and current detection module and the charging voltage and current conversion module
Output end is electrical connected, the output end of the voltage detection module and current detection module and the comparison process module input terminal
It is electrically connected, the output end of the comparison process module and the on or off module are electrically connected.
Preferably, the comparison process module includes comparison circuit and control circuit, the input terminal point of the comparison circuit
It is not electrically connected with the output end of voltage detection module and current detection module, the output end and control circuit of the comparison circuit
It is electrically connected, the control circuit and on or off module input are electrically connected.
Preferably, the on or off module is controllable switch control circuit.
Preferably, the charging voltage and current conversion module includes sequentially connected EMI filter circuit, rectifying and wave-filtering electricity
Road, DC/DC converter and output rectifier and filter, the input terminal of the EMI filter circuit are defeated on or off module
Outlet is electrically connected, and the output end of the output rectifier and filter is electrically connected with rechargeable battery and sample circuit respectively.
Preferably, the comparison process module, which is additionally provided with, turns circuit for lamp, and the circuit for lamp that turns includes several indicator lights, institute
It states and turns circuit for lamp and control circuit electric connection, for showing the state of charger.
Preferably, the indicator light is LED light.
By adopting the above technical scheme, voltage detection module and current detection module sample charging voltage and current conversion module
Voltage and current, when charging voltage, which reaches target rechargeable battery, expires piezoelectric voltage and charging current it is small to design setting value when, lead to
It crosses comparison process module and realizes shutdown charge power supply translation circuit power supply, to automatically shut down the electricity of charger when realizing fully charged
Source；
When charging voltage is close to zero or less than design setting value and electric current is exported most by charging voltage and current conversion module
Big value turns off charging voltage and current translation circuit power supply by comparing processing modules implement, thus when realizing charger short circuit certainly
The power supply of dynamic shutdown charger.
Detailed description of the invention
Fig. 1 is the structural block diagram of the charger of automatically cutting off power source of the present invention；
Fig. 2 is the structural block diagram of comparison process module in the charger of automatically cutting off power source of the present invention；
Fig. 3 is the structural block diagram of charging voltage and current conversion module in the charger of automatically cutting off power source of the present invention.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
As shown in Figure 1, a kind of charger of automatically cutting off power source, including power input 1, on or off module 2, charging
Voltage current transformation module 3, rechargeable battery 4, sampling module 5 and comparison process module 6, the sampling module 5 are examined including voltage
Module 51 and current detection module 52 are surveyed, wherein the power input 1, on or off module 2, charging voltage and current convert mould
Block 3, rechargeable battery 4 are successively electrically connected, and the input terminal of the voltage detection module 51 and current detection module 52 is filled with described
The connection of 3 output end of piezoelectric voltage current transformation module, the output end and institute of the voltage detection module 51 and current detection module 52
The electric connection of 6 input terminal of comparison process module is stated, the output end of the comparison process module 6 and the on or off module 2 are defeated
Enter end to be electrically connected.
As shown in Fig. 2, the comparison process module 6 includes comparison circuit 61 and control circuit 62, the comparison circuit 61
Input terminal respectively with the output end of voltage detection module 51 and current detection module 52 be electrically connected, the comparison circuit 61
Output end and control circuit 62 are electrically connected, and the control circuit 62 is electrically connected on or off module 2.
The on or off module 2 is controllable switch control circuit 62.
As shown in figure 3, the charging voltage and current conversion module 3 includes sequentially connected EMI filter circuit 31, rectification filter
Wave circuit 32, DC/DC converter 33 and output rectifier and filter 34, the input terminal of the EMI filter circuit 31 and connection
Turn off module 2 output end be electrically connected, the output end of the output rectifier and filter 34 respectively with rechargeable battery 4 and sampling
Module 5 is electrically connected.
Comparison process module 6 in the charger of automatically cutting off power source, which is additionally provided with, turns circuit for lamp 63, described to turn circuit for lamp
63 include several indicator lights, and the indicator light is LED light, described to turn circuit for lamp 63 and the electric connection of control circuit 62, for showing
Show the state of charger, when charging, controller output signal is to red light, during expression charges normal；When fully charged, controller output
Signal indicates fully charged to green light；When charger short circuit, controller output signal indicates battery charger failure to amber light.
The voltage detection module 51, using the big small-power resistance sampling of resistance value, for whether having electricity in detection circuit
Whether pressure and voltage are too high or too low；The current detection module 52 is sampled, such as health using the small high-power resistance of resistance value
Copper wire resistance, for whether having electric current flowing and electric current whether too high or too low in detection circuit.
In the present embodiment, the charger charging constant-current charge before this of automatically cutting off power source of the present invention, electric current is constant, electricity
Pressure constantly increases, and constant-voltage charge is automatically converted to when charging voltage reaches when target charging equipment provides full piezoelectric voltage, in perseverance
Pressure charging when voltage it is constant, electric current be it is smaller and smaller until charging current be less than design setting value when be automatically closed charging input
Power supply.
When charging, 220V alternating current is first become high voltage direct current by rectification circuit by charger, then passes through switch again
Pipe becomes hf and hv pulse, becomes action of low-voltage pulse by transformer again later, and the specific value of low pressure depends on being electrically charged setting
Standby required voltage.Finally, action of low-voltage pulse becomes corresponding direct current through over commutation, voltage regulator circuit.That is, from 220V
Alternating current provides that the process of the completely direct current of piezoelectric voltage can mainly pass through rectification circuit, transformer, pressure stabilizing to target charging equipment
Circuit etc..
The charger of automatically cutting off power source of the present invention realizes process:
Fully charged to automatically shut power off: charging voltage reaches target rechargeable battery 4 when expiring piezoelectric voltage and fills in charging process
Electric current it is small to design setting value when, compare by comparison circuit 61, control circuit 62 exports cut-off signals and gives on or off mould
Block 2 realizes the power supply of shutdown charging voltage and current conversion module 3, the power supply of charger is automatically shut down when fully charged, avoids and fills
Battery overcharges, while also reducing the electrical source consumption of charger, saves the energy.
Short circuit is automatically shut power off: charging voltage close to zero or is less than design setting value and electric current for charge power supply change when short-circuit
The maximum value that parallel operation is exported, compares, control circuit 62 exports cut-off signals on or off module 2 by comparison circuit 61,
The power supply for realizing shutdown charging voltage and current conversion module 3, automatically shuts down the power supply of charger when short-circuit, it is hidden to eliminate safety
Suffer from.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (6)
1. a kind of charger of automatically cutting off power source, it is characterised in that: including power input, on or off module, charging electricity
Current voltage conversion module, rechargeable battery, sampling module and comparison process module, the sampling module include voltage detection module and
Current detection module, wherein the power input, on or off module, charging voltage and current conversion module, rechargeable battery according to
The input terminal of secondary electric connection, the voltage detection module and current detection module and the charging voltage and current conversion module are defeated
Outlet is electrically connected, the output end and comparison process module input terminal electricity of the voltage detection module and current detection module
Property connection, the output end of the comparison process module and the on or off module are electrically connected.
2. the charger of automatically cutting off power source according to claim 1, it is characterised in that: the comparison process module includes
Comparison circuit and control circuit, the output with voltage detection module and current detection module respectively of the input terminal of the comparison circuit
End is electrically connected, and the output end and control circuit of the comparison circuit are electrically connected, the control circuit and on or off module
Input terminal is electrically connected.
3. the charger of automatically cutting off power source according to claim 2, it is characterised in that: the on or off module is can
Control ON-OFF control circuit.
4. the charger of automatically cutting off power source according to any one of claims 1 to 3, it is characterised in that: the charging electricity
Current voltage conversion module includes sequentially connected EMI filter circuit, current rectifying and wave filtering circuit, DC/DC converter and output rectification
Filter circuit, the input terminal of the EMI filter circuit and the output end of on or off module are electrically connected, the output rectification filter
The output end of wave circuit is electrically connected with rechargeable battery and sample circuit respectively.
5. the charger of automatically cutting off power source according to claim 2, it is characterised in that: the comparison process module is also set
It being equipped with and turns circuit for lamp, the circuit for lamp that turns includes several indicator lights, and it is described to turn circuit for lamp and control circuit electric connection, for showing
Show the state of charger.
6. the charger of automatically cutting off power source according to claim 5, it is characterised in that: the indicator light is LED light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309271.XA CN109361249A (en) | 2018-11-05 | 2018-11-05 | The charger of automatically cutting off power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309271.XA CN109361249A (en) | 2018-11-05 | 2018-11-05 | The charger of automatically cutting off power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109361249A true CN109361249A (en) | 2019-02-19 |
Family
ID=65344095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811309271.XA Withdrawn CN109361249A (en) | 2018-11-05 | 2018-11-05 | The charger of automatically cutting off power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109361249A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463861A (en) * | 2020-04-10 | 2020-07-28 | 东莞龙升电子有限公司 | Method and device for controlling charger switch, computer equipment and storage medium |
| CN113890161A (en) * | 2021-09-29 | 2022-01-04 | 深圳市明鑫电源技术有限公司 | Charging circuit and charger |
-
2018
- 2018-11-05 CN CN201811309271.XA patent/CN109361249A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463861A (en) * | 2020-04-10 | 2020-07-28 | 东莞龙升电子有限公司 | Method and device for controlling charger switch, computer equipment and storage medium |
| CN113890161A (en) * | 2021-09-29 | 2022-01-04 | 深圳市明鑫电源技术有限公司 | Charging circuit and charger |
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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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190219 |