CN205791676U - A kind of pre-charge circuit for lithium battery vacuum cleaner - Google Patents
A kind of pre-charge circuit for lithium battery vacuum cleaner Download PDFInfo
- Publication number
- CN205791676U CN205791676U CN201620532773.9U CN201620532773U CN205791676U CN 205791676 U CN205791676 U CN 205791676U CN 201620532773 U CN201620532773 U CN 201620532773U CN 205791676 U CN205791676 U CN 205791676U
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- CN
- China
- Prior art keywords
- resistance
- pmos
- charger
- battery
- lithium battery
- 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- Withdrawn - After Issue
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Abstract
nullThe utility model discloses a kind of pre-charge circuit for lithium battery vacuum cleaner，Including control module、Charger、First PMOS P1、Second PMOS P2、Diode D、First resistance R1、Second resistance R2、3rd resistance R3、4th resistance R4 and the 5th resistance R5，Described charger、First PMOS P1、Second PMOS P2、Diode D、First resistance R1、Second resistance R2、3rd resistance R3、4th resistance R4 and the 5th resistance R5 constitutes current-limiting circuit，For when battery connects charger，When detecting that battery is putting state excessively，Then PRECHG controls end input high level，First PMOS P1 disconnects，Second PMOS P2 conducting，Charger is pre-charged to battery small area analysis by the 4th resistance R4 and the 5th resistance R5 current limliting.This utility model can limit charging current so that charger can normally export electric current, and effect protected to lithium battery.
Description
Technical field
This utility model relates to a kind of battery protecting circuit, is specifically related to a kind of precharge electricity for lithium battery vacuum cleaner
Road.
Background technology
Along with the development of society, the raising of people's living standard, vacuum cleaner has become as in daily life indispensable
Household electrical appliance.The operation principle of vacuum cleaner is generally by the draught fan impeller of vacuum cleaner under motor high-speed driving, by impeller
In air discharge at a high speed blower fan, make air in vacuum part constantly be supplemented in blower fan simultaneously, thus and extraneous formed higher
Pressure reduction, the dust of suction nozzle is inhaled into vacuum part with air.
Hand-held cleaners is small and exquisite because of its build, is widely used flexibly and easily.It is typically for hand-held cleaners
Battery-powered, in many cases, it is provided that rechargeable battery.Wherein, lithium battery is because its storage energy density is high, use
The advantage of life-span length is more and more used, but, in use, lithium battery is crossed after putting, and cell voltage is the lowest, if
It is directly connected to charger charging, owing to cell voltage is relatively low, charger meeting hiccup protections, cause battery to be difficult to fill electricity with.
Therefore, a kind of pre-charge circuit for lithium battery vacuum cleaner is designed, it is possible to limit charging current so that charger
Can normally export electric current, and effect protected to lithium battery, it is clear that there is realistic meaning energetically.
Summary of the invention
Goal of the invention of the present utility model is to provide a kind of pre-charge circuit for lithium battery vacuum cleaner, it is possible to limits and fills
Electricity electric current so that charger can normally export electric current, and effect protected to lithium battery.
To achieve the above object of the invention, the technical solution adopted in the utility model is: a kind of for lithium battery vacuum cleaner
Pre-charge circuit, including control module, charger, the first PMOS P1, the second PMOS P2, diode D, the first resistance R1,
Second resistance R2, the 3rd resistance R3, the 4th resistance R4 and the 5th resistance R5,
The grid of described first PMOS P1 is connected respectively to PRECHG control output end and first resistance of control module
One end of R1, source electrode is connected respectively to the other end and the voltage source VCC of the first resistance R1, and drain electrode is connected to the one of the second resistance R2
End；
The grid of described second PMOS P2 is connected respectively to the other end of the second resistance R2, the positive pole of diode D and
One end of three resistance R3, source electrode is connected respectively to negative pole and the battery cathode of diode D, and drain electrode is connected to the one of the 4th resistance R4
End；
The other end of described 4th resistance R4 is connected to one end of the 5th resistance R5；
The other end of described 5th resistance R5 is connected respectively to the other end and one end of charger of the 3rd resistance R3；
The other end of described charger is connected to the positive pole of battery.
Further, also including NMOS tube N, the grid of described NMOS tube N is connected to the outfan of control module, and source electrode is even
Receiving between the 5th resistance R5 and charger, drain electrode is connected to battery cathode.
In technique scheme, described diode D is Zener diode.
Preferably, the resistance of described first resistance R1 and the 3rd resistance R3 is identical, described 4th resistance R4 and the 5th resistance
The resistance of R5 is identical, and the resistance of the described second resistance R2 resistance less than the first resistance R1 and the 3rd resistance R3 is more than the 4th resistance
R4 and the resistance of the 5th resistance R5.
Operation principle of the present utility model is: when battery connects charger, if battery did not had to put, then a PMOS
Pipe P1 and the conducting of NMOS tube N, charger charges normal to battery through NMOS tube N；When detecting that battery puts state in mistake,
First PMOS P1 and NMOS tube N disconnect, and the second PMOS P2 conducting, charger is limited by the 4th resistance R4 and the 5th resistance R5
Flow and be pre-charged to battery small area analysis, it is ensured that charger can normally export electric current, is precharged to single battery voltage and exceedes necessarily
During value, the first PMOS P1 and the conducting of NMOS tube N, the second PMOS P2 disconnects, and charger continues to carry out to battery through NMOS tube N
Charge normal.
Owing to technique scheme is used, this utility model compared with prior art has the advantage that
Pre-charge circuit of the present utility model, when battery connects charger, when detecting that battery is putting state, then excessively
PRECHG controls end output high level, and the first PMOS disconnects, and the second PMOS conducting, charger is by the 4th resistance R4 and the
Five resistance R5 current limlitings are pre-charged to battery small area analysis, it is ensured that charger can normally export electric current, and work protected to lithium battery
With.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram in this utility model embodiment one.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is further described by embodiment:
Embodiment one:
Shown in Figure 1, a kind of pre-charge circuit for lithium battery vacuum cleaner, including control module, charger, first
PMOS P1, the second PMOS P2, diode D, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4,
Five resistance R5 and NMOS tube N,
The grid of described first PMOS P1 is connected respectively to PRECHG control output end and first resistance of control module
One end of R1, source electrode is connected respectively to the other end and the voltage source VCC of the first resistance R1, and drain electrode is connected to the one of the second resistance R2
End；
The grid of described second PMOS P2 is connected respectively to the other end of the second resistance R2, the positive pole of diode D and
One end of three resistance R3, source electrode is connected respectively to negative pole and the battery cathode of diode D, and drain electrode is connected to the one of the 4th resistance R4
End；
The other end of described 4th resistance R4 is connected to one end of the 5th resistance R5；
The other end of described 5th resistance R5 is connected respectively to the other end and one end of charger of the 3rd resistance R3；
The other end of described charger is connected to the positive pole of battery；
The grid of described NMOS tube N is connected to the outfan of control module, and source electrode is connected to the 5th resistance R5 and charger
Between, drain electrode is connected to battery cathode.
Wherein, described diode D is Zener diode.
In the present embodiment, the resistance of described first resistance R1 and the 3rd resistance R3 is identical, described 4th resistance R4 and the 5th
The resistance of resistance R5 is identical, and the resistance of the described second resistance R2 resistance less than the first resistance R1 and the 3rd resistance R3 is more than the 4th
Resistance R4 and the resistance of the 5th resistance R5.
It is noted that described 4th resistance R4 and the 5th resistance R5 equivalence can become a resistance to be the total resistance of its series connection
In the single resistance access circuit of value, the present embodiment use two resistance R4 and R5 that resistance is identical in order to reduce
Each ohmically power consumption.
Specifically, voltage source VCC selects 3.3V, and the first resistance R1 resistance is 1M, the second resistance R2 resistance is 200K,
3rd resistance R3 resistance is 1M, the 4th resistance R4 resistance is 510, the 5th resistance R5 resistance is 510, when battery connects
During charger, if battery did not had to put, then control module is to the grid input high level of NMOS tube N, and PRECHG controls output
End is to the first PMOS P1 input low level, and now, NMOS tube N and the conducting of the first PMOS P1, the second PMOS P2 disconnects, fills
Electrical equipment, NMOS tube N and battery constitute charge circuit, directly charge the battery；When detecting that battery, when excessively putting state, controls mould
Block is to the grid input low level of NMOS tube N, and PRECHG control output end is to the first PMOS P1 input high level, now,
NMOS tube N and the first PMOS P1 disconnect, and the voltage of one end that the 3rd resistance R3 is connected with charger can be electrically charged device and drag down, surely
Pressure diode D is upper can produce pressure drop, and the second PMOS P2 that this voltage can make turns on, charger, the second PMOS P2, the
Four resistance R4, the 5th resistance R5 and battery constitute charge circuit, little to battery by the 4th resistance R4 and the 5th resistance R5 current limliting
After pre-charge electricity is above certain value (such as 3V) to single battery voltage, PRECHG control output end is defeated to the first PMOS P1
Entering low level, control module is to the grid input high level of NMOS tube N, NMOS tube N and the conducting of the first PMOS P1, the 2nd PMOS
Pipe P2 disconnects, then is charged normal to battery through NMOS tube N by charger.
Claims (4)
1. the pre-charge circuit for lithium battery vacuum cleaner, it is characterised in that: include control module, charger, first
PMOS P1, the second PMOS P2, diode D, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and
Five resistance R5,
The grid of described first PMOS P1 is connected respectively to the PRECHG control output end of control module and the first resistance R1's
One end, source electrode is connected respectively to the other end and the voltage source VCC of the first resistance R1, and drain electrode is connected to one end of the second resistance R2；
The grid of described second PMOS P2 is connected respectively to the other end of the second resistance R2, the positive pole of diode D and the 3rd electricity
One end of resistance R3, source electrode is connected respectively to negative pole and the battery cathode of diode D, and drain electrode is connected to one end of the 4th resistance R4；
The other end of described 4th resistance R4 is connected to one end of the 5th resistance R5；
The other end of described 5th resistance R5 is connected respectively to the other end and one end of charger of the 3rd resistance R3；
The other end of described charger is connected to the positive pole of battery.
Pre-charge circuit for lithium battery vacuum cleaner the most according to claim 1, it is characterised in that: also include NMOS tube
N, the grid of described NMOS tube N is connected to the outfan of control module, and source electrode is connected between the 5th resistance R5 and charger, leakage
Pole is connected to battery cathode.
Pre-charge circuit for lithium battery vacuum cleaner the most according to claim 1, it is characterised in that: described diode D
For Zener diode.
Pre-charge circuit for lithium battery vacuum cleaner the most according to claim 1, it is characterised in that: described first resistance
The resistance of R1 and the 3rd resistance R3 is identical, and the resistance of described 4th resistance R4 and the 5th resistance R5 is identical, described second resistance R2
The resistance resistance less than the first resistance R1 and the 3rd resistance R3 more than the 4th resistance R4 and the resistance of the 5th resistance R5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620532773.9U CN205791676U (en) | 2016-06-02 | 2016-06-02 | A kind of pre-charge circuit for lithium battery vacuum cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620532773.9U CN205791676U (en) | 2016-06-02 | 2016-06-02 | A kind of pre-charge circuit for lithium battery vacuum cleaner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205791676U true CN205791676U (en) | 2016-12-07 |
Family
ID=58137051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620532773.9U Withdrawn - After Issue CN205791676U (en) | 2016-06-02 | 2016-06-02 | A kind of pre-charge circuit for lithium battery vacuum cleaner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205791676U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846516A (en) * | 2016-06-02 | 2016-08-10 | 苏州普发科技有限公司 | Pre-charging circuit for lithium battery dust collector |
-
2016
- 2016-06-02 CN CN201620532773.9U patent/CN205791676U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846516A (en) * | 2016-06-02 | 2016-08-10 | 苏州普发科技有限公司 | Pre-charging circuit for lithium battery dust collector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161207 Effective date of abandoning: 20180330 |