CN105846516B - A kind of pre-charge circuit for lithium battery dust catcher - Google Patents
A kind of pre-charge circuit for lithium battery dust catcher Download PDFInfo
- Publication number
- CN105846516B CN105846516B CN201610388645.6A CN201610388645A CN105846516B CN 105846516 B CN105846516 B CN 105846516B CN 201610388645 A CN201610388645 A CN 201610388645A CN 105846516 B CN105846516 B CN 105846516B
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- Prior art keywords
- resistance
- resistor
- pmos
- charger
- battery
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Classifications
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of pre-charge circuit for lithium battery dust catcher,Including control module,Charger,First PMOS P1,Second PMOS P2,Diode D,First resistor R1,Second resistance R2,3rd resistor R3,4th resistance R4 and the 5th resistance R5,The charger,First PMOS P1,Second PMOS P2,Diode D,First resistor R1,Second resistance R2,3rd resistor R3,4th resistance R4 and the 5th resistance R5 forms current-limiting circuit,For when battery connects charger,When detect battery cross putting state,Then PRECHG control terminals input high level,First PMOS P1 disconnects,Second PMOS P2 is turned on,Charger is pre-charged by the 4th resistance R4 and the 5th resistance R5 current limlitings to battery low current.The present invention can limit charging current so that charger can normal output current, and have protective effect to lithium battery.
Description
Technical field
The present invention relates to a kind of battery protecting circuit, and in particular to a kind of pre-charge circuit for lithium battery dust catcher.
Background technology
With the development of society, the improvement of people's living standards, dust catcher has become indispensable in daily life
Household electrical appliance.The operation principle of dust catcher is generally the draught fan impeller by dust catcher under motor high-speed driving, by impeller
In air discharge blower fan at a high speed, while air in vacuum part is constantly supplemented air inlet fan, so as to and it is extraneous formed it is higher
Pressure difference, the dust of suction nozzle is inhaled into vacuum part with air.
Hand-held cleaners are flexibly and easily widely used because its build is compact.It is typically for hand-held cleaners
It is battery powered, in many cases, there is provided rechargeable battery.Wherein, lithium battery is because its storage energy density is high, uses
The advantages of long lifespan, is more and more used, however, in use, lithium battery is crossed put after, cell voltage is very low, if
Charger charging is directly connected to, because cell voltage is relatively low, charger meeting hiccup protections, it is difficult to fill electricity with to cause battery.
Therefore, a kind of pre-charge circuit for lithium battery dust catcher is designed, charging current can be limited so that charger
Can normal output current, and have protective effect to lithium battery, it is clear that there is energetically realistic meaning.
The content of the invention
The goal of the invention of the present invention is to provide a kind of pre-charge circuit for lithium battery dust catcher, can limit charging electricity
Stream so that charger can normal output current, and have protective effect to lithium battery.
To achieve the above object of the invention, the technical solution adopted by the present invention is：A kind of preliminary filling for lithium battery dust catcher
Circuit, including control module, charger, the first PMOS P1, the second PMOS P2, diode D, first resistor R1, second
Resistance R2,3rd resistor R3, the 4th resistance R4 and the 5th resistance R5,
The grid of the first PMOS P1 is connected respectively to PRECHG control output ends and the first resistor of control module
R1 one end, source electrode are connected respectively to the first resistor R1 other end and voltage source VCC, and drain electrode is connected to the one of second resistance R2
End；
The grid of the second PMOS P2 is connected respectively to the second resistance R2 other end, diode D positive pole and
Three resistance R3 one end, source electrode are connected respectively to diode D negative pole and GND, and drain electrode is connected to the one of the 4th resistance R4
End；
The other end of the 4th resistance R4 is connected to the 5th resistance R5 one end；
The other end of the 5th resistance R5 is connected respectively to one end of the 3rd resistor R3 other end and charger；
The other end of the charger is connected to the positive pole of battery.
Further, in addition to NMOS tube N, NMOS tube N grid is connected to the output end of control module, and source electrode connects
It is connected between the 5th resistance R5 and charger, drain electrode is connected to GND.
In above-mentioned technical proposal, the diode D is voltage-regulator diode.
Preferably, the first resistor R1 is identical with 3rd resistor R3 resistance, the 4th resistance R4 and the 5th resistance
R5 resistance is identical, and resistance of the resistance less than first resistor R1 and 3rd resistor R3 of the second resistance R2 is more than the 4th resistance
R4 and the 5th resistance R5 resistance.
The present invention operation principle be：When battery connects charger, if battery did not had to put, the first PMOS P1
Turned on NMOS tube N, charger is charged normal through NMOS tube N to battery；When detecting that battery is putting state excessively, first
PMOS P1 and NMOS tube N disconnects, and the second PMOS P2 conductings, charger is given by the 4th resistance R4 and the 5th resistance R5 current limlitings
Battery low current is pre-charged, it is ensured that charger can normal output current, when being precharged to single battery voltage and exceeding certain value,
First PMOS P1 and NMOS tube N conductings, the second PMOS P2 disconnect, and charger continues to carry out normally to battery through NMOS tube N
Charging.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
The pre-charge circuit of the present invention, when battery connects charger, state is being put crossing when detecting battery, then PRECHG
Control terminal exports high level, and the first PMOS disconnects, and the second PMOS conducting, charger passes through the 4th resistance R4 and the 5th resistance
R5 current limlitings give the precharge of battery low current, it is ensured that charger can normal output current, and have protective effect to lithium battery.
Brief description of the drawings
Fig. 1 is the electrical block diagram in the embodiment of the present invention one.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Embodiment one：
It is shown in Figure 1, a kind of pre-charge circuit for lithium battery dust catcher, including control module, charger, first
PMOS P1, the second PMOS P2, diode D, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4,
Five resistance R5 and NMOS tube N,
The grid of the first PMOS P1 is connected respectively to PRECHG control output ends and the first resistor of control module
R1 one end, source electrode are connected respectively to the first resistor R1 other end and voltage source VCC, and drain electrode is connected to the one of second resistance R2
End；
The grid of the second PMOS P2 is connected respectively to the second resistance R2 other end, diode D positive pole and
Three resistance R3 one end, source electrode are connected respectively to diode D negative pole and GND, and drain electrode is connected to the one of the 4th resistance R4
End；
The other end of the 4th resistance R4 is connected to the 5th resistance R5 one end；
The other end of the 5th resistance R5 is connected respectively to one end of the 3rd resistor R3 other end and charger；
The other end of the charger is connected to the positive pole of battery；
The grid of the NMOS tube N is connected to the output end of control module, and source electrode is connected to the 5th resistance R5 and charger
Between, drain electrode is connected to GND.
Wherein, the diode D is voltage-regulator diode.
In the present embodiment, the first resistor R1 is identical with 3rd resistor R3 resistance, the 4th resistance R4 and the 5th
Resistance R5 resistance is identical, and resistance of the resistance less than first resistor R1 and 3rd resistor R3 of the second resistance R2 is more than the 4th
Resistance R4 and the 5th resistance R5 resistance.
It is noted that the 4th resistance R4 and the 5th resistance R5 can always be hindered using equivalent into a resistance as its series connection
In the single resistance access circuit of value, resistance identical two resistance R4 and R5 are used in the present embodiment, in order to reduce
Each ohmically power consumption.
Specifically, voltage source VCC selects 3.3V, and first resistor R1 resistances are 1M, second resistance R2 resistances are 200K,
3rd resistor R3 resistances are 1M, the 4th resistance R4 resistances are 510, the 5th resistance R5 resistances are 510, when battery connection is filled
During electrical equipment, if battery did not had to put, control module is to NMOS tube N grid input high level, PRECHG control output ends
To the first PMOS P1 input low levels, now, NMOS tube N and the first PMOS P1 conductings, the second PMOS P2 disconnect, charging
Device, NMOS tube N and battery form charge circuit, directly charge the battery；When detecting that battery is putting state excessively, control module
To NMOS tube N grid input low level, PRECHG control output ends are to the first PMOS P1 input high levels, now, NMOS
Pipe N and the first PMOS P1 disconnects, and the voltage of one end that 3rd resistor R3 is connected with charger can be electrically charged device and drag down, voltage stabilizing two
Pressure drop can be produced on pole pipe D, the second PMOS P2 conductings that this voltage can make, charger, the second PMOS P2, the 4th electricity
Hinder R4, the 5th resistance R5 and battery and form charge circuit, battery low current is given by the 4th resistance R4 and the 5th resistance R5 current limlitings
It is precharged to single battery voltage and is above certain value（Such as 3V）Afterwards, PRECHG control output ends input low to the first PMOS P1
Level, grid input high level from control module to NMOS tube N, NMOS tube N and the first PMOS P1 conducting, the second PMOS P2
Disconnect, then charged normal by charger through NMOS tube N to battery.
Claims (4)
- A kind of 1. pre-charge circuit for lithium battery dust catcher, it is characterised in that：Including control module, charger, first PMOS P1, the second PMOS P2, diode D, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4 and Five resistance R5,The grid of the first PMOS P1 is connected respectively to PRECHG control output ends and the first resistor R1 of control module One end, source electrode are connected respectively to the first resistor R1 other end and voltage source VCC, and drain electrode is connected to second resistance R2 one end；The grid of the second PMOS P2 is connected respectively to the second resistance R2 other end, diode D positive pole and the 3rd electricity R3 one end is hindered, source electrode is connected respectively to diode D negative pole and GND, and drain electrode is connected to the 4th resistance R4 one end；The other end of the 4th resistance R4 is connected to the 5th resistance R5 one end；The other end of the 5th resistance R5 is connected respectively to one end of the 3rd resistor R3 other end and charger；The other end of the charger is connected to the positive pole of battery.
- 2. the pre-charge circuit according to claim 1 for lithium battery dust catcher, it is characterised in that：Also include NMOS tube N, the NMOS tube N grid are connected to the output end of control module, and source electrode is connected between the 5th resistance R5 and charger, leakage Pole is connected to GND.
- 3. the pre-charge circuit according to claim 1 for lithium battery dust catcher, it is characterised in that：The diode D For voltage-regulator diode.
- 4. the pre-charge circuit according to claim 1 for lithium battery dust catcher, it is characterised in that：The first resistor R1 is identical with 3rd resistor R3 resistance, and the resistance of the 4th resistance R4 and the 5th resistance R5 is identical, the second resistance R2 Resistance less than first resistor R1 and 3rd resistor R3 resistance be more than the 4th resistance R4 and the 5th resistance R5 resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610388645.6A CN105846516B (en) | 2016-06-02 | 2016-06-02 | A kind of pre-charge circuit for lithium battery dust catcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610388645.6A CN105846516B (en) | 2016-06-02 | 2016-06-02 | A kind of pre-charge circuit for lithium battery dust catcher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105846516A CN105846516A (en) | 2016-08-10 |
| CN105846516B true CN105846516B (en) | 2018-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610388645.6A Active CN105846516B (en) | 2016-06-02 | 2016-06-02 | A kind of pre-charge circuit for lithium battery dust catcher |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5706649B2 (en) * | 2010-09-08 | 2015-04-22 | セイコーインスツル株式会社 | Charge / discharge control circuit and battery device |
| JP2013211974A (en) * | 2012-03-30 | 2013-10-10 | Renesas Electronics Corp | Semiconductor device for battery control, and battery pack |
| CN102709980B (en) * | 2012-06-07 | 2015-08-12 | 广州益维电动汽车有限公司 | A kind of serial lithium battery group baffle based on battery protection chip |
| CN203660607U (en) * | 2014-01-09 | 2014-06-18 | 上海长园维安电子线路保护有限公司 | Rechargeable battery protection device using weak-current switch to control output |
| CN205791676U (en) * | 2016-06-02 | 2016-12-07 | 苏州普发科技有限公司 | A kind of pre-charge circuit for lithium battery vacuum cleaner |
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2016
- 2016-06-02 CN CN201610388645.6A patent/CN105846516B/en active Active
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| Publication number | Publication date |
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| CN105846516A (en) | 2016-08-10 |
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