CN104242363B - Chargeable electric tool - Google Patents
Chargeable electric tool Download PDFInfo
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- CN104242363B CN104242363B CN201310237430.0A CN201310237430A CN104242363B CN 104242363 B CN104242363 B CN 104242363B CN 201310237430 A CN201310237430 A CN 201310237430A CN 104242363 B CN104242363 B CN 104242363B
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- 238000001514 detection method Methods 0.000 claims abstract description 39
- 230000005856 abnormality Effects 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000005669 field effect Effects 0.000 description 32
- 230000000694 effects Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The present invention provides a kind of chargeable electric tool, and it includes：The execution unit of driven by power, provide the rechargeable battery of electric power for the execution unit and be connected with external charger and while the supply line of electric power provided for electric tool and rechargeable battery.Chargeable electric tool also includes electric current distribute module, control module and detection module, the working condition of detection module detection motor and the charged state of rechargeable battery, state control module to be worked according to the testing result control electric current distribution module of detection module, the control signal control that electric current distribute module is transmitted according to control module supplies the electric current of motor and rechargeable battery from supply line.The electric current for being supplied to motor and rechargeable battery can be adjusted flexibly in electric current distribute module, so can just be less than electric current sum when motor normal work and rechargeable battery be charged normal from the electric current sum that charger is exported to motor and rechargeable battery, the output current of charger diminishes, and the cost of charger is also just relatively low.
Description
Technical field
The present invention relates to a kind of electric tool, more particularly to a kind of chargeable electric tool.
Background technology
Electric tool can typically use rechargeable battery to provide energy for electric tool in order to easy to use.It is so electronic
Instrument is just operated without electric wire in tow when in use., it is necessary to chargeable electricity after the electricity in rechargeable battery is finished
Charged in pond.Now, electric tool may be also needed to work on.That is electric tool is needed to be worked in charging.
For this type electric tool, the charging current I of charger with matching need to be more than power output electric current I1 and
Battery charge I2 sums, to ensure the requirement for realizing work and charging simultaneously.That is output current of charger I >=I1+I2.This
Sample, it is desirable to which the charging current of charger is larger, the volume of charger will be larger, and the cost of charger also can be higher.In addition,
When electric tool does not work, the output current of charger can all supply rechargeable battery, can cause the charging of rechargeable battery
Electric current is excessive, influences the service life of rechargeable battery.
The content of the invention
Based on this, it is necessary to provide a kind of chargeable electric tool, it can reduce the cost of charger.
A kind of chargeable electric tool, including：The execution unit of driven by power, electric power is provided for the execution unit can
Rechargeable battery and the supply line for being connected and being provided simultaneously for electric tool and rechargeable battery electric power with external charger, institute
State electric current distribute module, control that chargeable electric tool also includes being located between supply line and execution unit and rechargeable battery
Molding block and detection module, the detection module detect the working condition and rechargeable battery working condition of execution unit, described
Control module obtains the testing result of detection module and generates control signal, and the electric current distribute module is transmitted according to control module
Control signal adjustment supply line distribute to the current ratio of execution unit and rechargeable battery.
In one of the embodiments, the working condition of the execution unit includes low current running status and high current is transported
Row state, when detection module detects execution unit and is switched to low current running status, electric current distribute module reduction supply line
It is transferred to the current ratio of execution unit；When detection module detects execution unit and is switched to high current running status, electric current point
Increase the current ratio that supply line is transferred to execution unit with module.
In one of the embodiments, the electric current distribute module control does not surpass all the time to the charging current of rechargeable battery
Cross its maximum charging current.
In one of the embodiments, the working condition of the execution unit includes conventional sense and abnormality, is located at
Electric current can be provided maximum current more than supply line needed for the execution unit of abnormality, and detection module detects execution unit
When switching to abnormality by conventional sense, control module controls rechargeable battery to power executable part；Detection module is examined
When measuring execution unit and switching to conventional sense by abnormality, control module stops confession of the rechargeable battery to execution unit
Electricity.
In one of the embodiments, the electric current distribute module includes the first current control unit of control electric current size
With the second current control unit, first current control unit is connected between the supply line and the execution unit,
Second current control unit is connected between the supply line and the rechargeable battery.
In one of the embodiments, first current control unit is first switch control element, the second electric current control
Unit processed is second switch control element, and first switch control element is connected with execution unit and supply line respectively, and second opens
Control element is closed respectively with rechargeable battery and supply line to be connected, first switch control element and second switch control element
Control end is connected with control module by control module control.
In one of the embodiments, control is connected between the execution unit and first current control unit to hold
The status switch of row component working.
In one of the embodiments, the chargeable electric tool also includes the instruction for being used to indicate whether charging complete
Module.
The working condition for the motor that above-mentioned chargeable electric tool is detected by control module according to detection module and it can fill
The charged state of battery carrys out the electric current that control electric current distribution module assignment supplies motor and rechargeable battery from charging inlet, this
Sample can turn down or mediate the electric current for flowing to rechargeable battery when motor works, heightened when motor does not work flow to it is chargeable
The electric current of battery.Because the electric current for being supplied to motor and rechargeable battery can be adjusted flexibly in electric current distribute module, from filling
Electrical equipment is exported can just be less than motor normal work to the electric current sum of motor and rechargeable battery and rechargeable battery normally fills
Electric current sum when electric, the output current of charger diminishes, and the cost of charger is also just relatively low.
Brief description of the drawings
Fig. 1 is the charging circuit functional block diagram of the chargeable electric tool of one embodiment；
Fig. 2 is the charging circuit figure of chargeable electric tool shown in Fig. 1.
The motor 140 of 110 control module of electric current distribute module, 120 detection module 130
The field-effect transistor Q1 of 150 indicating module of rechargeable battery, 160 charger 200 first
Second field-effect transistor Q2 the second field-effect transistor Q3 status switches S
Embodiment
Fig. 1 is refer to, one embodiment provides a kind of chargeable electric tool.The chargeable electric tool includes enforcement division
Part, the rechargeable battery 150 that energy is provided for execution unit and it is connected to electric tool with external charger 200 energy is provided
Supply line.Rechargeable battery 150 and pass through between execution unit external charger 200 and between external charger 200
Supply line is connected.The chargeable electric tool can be electric drill, electric grinder, electric wrench, electric screw driver, sound equipment
Deng execution unit can be with drill bit, emery wheel, audio-frequency module etc..The chargeable electric tool also includes electric current distribute module 110, control
Molding block 120, detection module 130 and indicating module 160.Execution unit herein is motor 140, is performed in other embodiments
Part can also be audio-frequency module.Electric current distribute module 110 with external charger 200, rechargeable battery 150 and barycenter part
It is connected.Detection module 130 detects execution unit（That is motor 140）Working condition and rechargeable battery 150 working condition, control
Molding block 120 obtains the testing result of detection module 130 and generates control signal, and electric current distribute module 110 is according to control module
The 120 control signal adjustment motors 140 transmitted and the current ratio obtained by rechargeable battery 150, indicating module 160 and control
Module 120 be connected, be used to refer to whether charging complete.When 150 charging complete of rechargeable battery, the control of control module 120 refers to
Show that module 160 indicates charging complete.
In addition, when detection module 130 detects motor 140 and is in starting state, the increase power supply of electric current distribute module 110
Circuit is transferred to the current ratio of motor 140；When detection module 130, which detects motor 140, is off state, electric current distribution
The reduction of module 110 supply line is transferred to the current ratio of motor 140.Electric current distribute module 110 is controlled to rechargeable battery 150
Charging current all the time be no more than its maximum charging current.It can so ensure that rechargeable battery 150 is in charging process
Safe condition.
Herein, execution unit（That is motor 140）Working condition include low current running status and high current running status.
Detection module 130 detects execution unit（That is motor 140）When being switched to low current running status, electric current distribute module 110 drops
Low supply line is transferred to the current ratio of execution unit；Detection module 130 detects execution unit and is switched to high current operation
During state, the increase of electric current distribute module 110 supply line is transferred to the current ratio of execution unit.The working condition of execution unit
Also include conventional sense and abnormality.When execution unit is in conventional sense, the electric current needed for it is less than 200 energy of charger
The electric current of offer；When execution unit is in abnormal starting state, the electric current needed for it is more than the electricity that charger 200 can be provided
Stream.Abnormality is switched to when detection module 130 detects execution unit by conventional sense constantly, and the control of control module 120 can
Rechargeable battery 150 is powered to execution unit, while electric current distribute module 110 turns off the charging current to rechargeable battery 150.Inspection
When surveying module 130 and detecting execution unit and switch to conventional sense by abnormality, control module 120 stops rechargeable battery
The power supply of 150 pairs of execution units.The working condition of rechargeable battery 150 include rechargeable battery whether two kinds of shapes of charging complete
State.When 150 charging complete of rechargeable battery, electric current distribute module 110 no longer will distribute electric current for rechargeable battery 150.Should
Rechargeable battery 150 in embodiment can be lithium ion battery or lead accumulator.
In addition, being connected with steady flow unit between supply line and electric current distribute module 110.Steady flow unit can make from power supply
Line input current distribute module 110 is more stablized, so as to play a part of protection motor 140 and rechargeable battery 150.
Specifically, the electric current distribute module 110 of the chargeable electric tool includes the first electric current control of control electric current size
Unit processed and the second current control unit.First current control unit is connected between supply line and motor 140, the second electric current
Control unit is connected between supply line and rechargeable battery 150.Wherein, the first current control unit controls for first switch
Element, the second current control unit be second switch control element, first switch control element respectively with execution unit and power supply
Circuit is connected, and second switch control element is connected with rechargeable battery and supply line respectively, and switch control element and second is opened
The control end of pass control element is connected with control module 120 to be controlled by control module 120.
Fig. 2 is refer to, first switch control element and second switch control element are field-effect transistor.Wherein,
One current control unit is that first the second current control units of field-effect transistor Q1 are the second field-effect transistor Q2.First
Effect transistor Q1 source electrode and drain electrode are connected with motor 140 and supply line respectively, the second field-effect transistor Q2 source electrode
It is connected respectively with rechargeable battery 150 and supply line with drain electrode.First field-effect transistor Q1 and the second field-effect transistor
Q2 grid is connected with control module 120.The work shape for the motor 140 that control module 120 can be detected according to detection module 130
State and the charged state of rechargeable battery 150 control to flow through the first field-effect transistor Q1's and the second field-effect transistor Q2
The size of electric current.Control module 120 herein is single-chip microcomputer.The control module 120 can also control the chargeable electric tool
The work of other modules.
The status switch S of controlled motor work is connected between the current control unit of motor 140 and first.Work as status switch
S closes rear motor 140 and started working.Cell switch is connected between status switch S and rechargeable battery 150.Cell switch
For field-effect transistor, cell switch is the 3rd field-effect transistor Q3 herein.3rd field-effect transistor Q3 source electrode and leakage
Pole is connected with status switch S and rechargeable battery 150 respectively, the 3rd field-effect transistor Q3 grid and the phase of control module 120
Even.When there is particular case, when the electric current required for motor 140 is more than the electric current that supply line inputs, the 3rd field effect transistor
Pipe Q3 can be opened, and such rechargeable battery 150 can power for motor 140 simultaneously.The electric current that motor 140 is obtained will be compared with
Greatly, so as to meet the demand of motor 140.Certainly, this particular case duration will not be oversize.Particular case terminate after just
The 3rd field-effect transistor Q3 can be closed.
When the electricity in rechargeable battery 150 is finished, the supply line of the chargeable electric tool can be with the phase of charger 200
Even, charger 200 will charge for rechargeable battery 150.When detection module 130, which detects motor 140, not to work, control module
120 will close the first field-effect transistor Q1 and the 3rd field-effect transistor Q3, and by adjusting the second field-effect transistor Q2
Control enters the charging current of rechargeable battery 150.Now, the charging current that rechargeable battery 150 is obtained is optimal charge electricity
Stream.That is, now the charging current of input rechargeable battery 150 will not only be damaged but also energy to rechargeable battery 150
Guarantee is rapidly completed charging.
When detection module 130, which detects motor 140, needs work（I.e. now motor 140 is working condition）, control mould
Block 120 can determine whether the working condition of motor 140 by detection module 130, that is, judge the work electricity required for motor 140
The size of stream.When the operating current required for motor 140, which is not more than charger 200, is input to the electric current of supply line, control
Module 120 will close the 3rd field-effect transistor Q3, and by adjusting the first field-effect transistor Q1 and the second field effect transistor
Pipe Q2 controls the electric current of entrance motor 140 and rechargeable battery 150 to distribute.It now can preferentially meet motor 140 and work required
Electric current, remaining electric current is supplied to rechargeable battery 150.
Work is needed when detection module 130 detects motor 140, and control module 120 is judged by detection module 130
When operating current required for motor 140 is input to the electric current of supply line more than charger 200, control module 120 will be closed
Second field-effect transistor Q2, and distribute control by adjusting the first field-effect transistor Q1 and the 3rd field-effect transistor Q3
Into the electric current of motor 140.Now electric current preferentially can be obtained from charger 200, remaining electric current is obtained from rechargeable battery 150 again
.
When detection module 130 detects 150 charging complete of rechargeable battery（I.e. now rechargeable battery 150 be in fill
Electric completion status）, control module 120 will close the second field-effect transistor Q2, while controlling the display of indicating module 160 to charge
Into to remind operator to pull out charger 200.If the electric current required for operator pulls out charger 200, motor will be by that can fill
Battery 150 is provided.Now control module 120 can open the 3rd field-effect transistor Q3 or while open the first field-effect crystalline substance
Body pipe Q1 and the second field-effect transistor Q2.If operator is pulls out charger 200, control module 120 can adjust first
Effect transistor Q1, is that motor 140 provides electric current by charger 200.Electric current required for there is motor 140 is more than supply lines
During the special circumstances of the electric current of road input, control module 120 can adjust the first field-effect transistor Q1 and the 3rd field-effect simultaneously
Transistor Q3 thinks that motor 140 is powered.
The supply line of the chargeable electric tool is connected with charger 200 when being charged to rechargeable battery 150, can pass through
Whether the detection motor 140 of detection module 130 needs work, the electricity then inputted again by electric current distribute module 110 to supply line
Stream is allocated.Due to the presence of electric current distribute module 110, the electric current for flowing into motor 140 and rechargeable battery 150 just can basis
Need to be allocated, and preferentially ensure the electric current needed for motor 140.So, the electric current that charger 200 is exported can just be less than electricity
Electric current sum needed for the normal work of machine 140 is charged normal with rechargeable battery 150.The output current of charger 200 is relative to biography
The output current of system charger is reduced, and the cost of charger 200 can just be reduced, and the volume of charger 200 can also reduce.
Further, since electric current distribute module 110 can control to flow into the electric current 150 of rechargeable battery, when rechargeable battery 150 charges
Charging current is with regard to that can be controlled in suitable size, so as to prevent excessive charging current from being damaged to rechargeable battery 150.
So, the life-span of rechargeable battery 150 is with regard to that can be extended.
The working condition for the motor that the chargeable electric tool is detected by control module according to detection module and chargeable
The charged state of battery carrys out the electric current that control electric current distribution module assignment supplies motor and rechargeable battery from supply line, so
The electric current for flowing to rechargeable battery can be turned down or mediated when motor works, and heightened when motor does not work and flowed to chargeable electricity
The electric current in pond.Because the electric current for being supplied to motor and rechargeable battery can be adjusted flexibly in electric current distribute module, from charging
Device is exported can just be less than motor normal work to the electric current sum of motor and rechargeable battery and rechargeable battery is charged normal
When electric current sum, the output current of charger diminishes, and the cost of charger is also just relatively low.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (5)
1. a kind of chargeable electric tool, including：The execution unit of driven by power, for the execution unit provide filling for electric power
Battery and the supply line for being connected and being provided simultaneously for electric tool and rechargeable battery electric power with external charger, it is special
Levy and be：The chargeable electric tool also includes the electric current point being located between supply line and execution unit and rechargeable battery
With module, control module and detection module, the working condition of the detection module detection execution unit and rechargeable battery work
State, the control module obtains the testing result of detection module and generates control signal, and the electric current distribute module is according to control
The control signal adjustment supply line that molding block is transmitted distributes to the current ratio of execution unit and rechargeable battery；
The working condition of the execution unit includes low current running status and high current running status, and detection module, which is detected, to be held
When row part is switched to low current running status, electric current distribute module reduction supply line is transferred to the electric current ratio of execution unit
Example；When detection module detects execution unit and is switched to high current running status, the transmission of electric current distribute module increase supply line
To the current ratio of execution unit；
The electric current distribute module includes the first current control unit and the second current control unit of control electric current size, described
First current control unit is connected between the supply line and the execution unit, the second current control unit connection
Between the supply line and the rechargeable battery；
The status switch of control execution unit work, institute are connected between the execution unit and first current control unit
State and cell switch is connected between status switch and rechargeable battery, the electric current required for there is particular case, motor is more than
During the electric current of supply line's input, cell switch is opened, and rechargeable battery is powered for motor simultaneously.
2. chargeable electric tool according to claim 1, it is characterised in that：The electric current distribute module control pair can fill
The charging current of battery is no more than its maximum charging current all the time.
3. chargeable electric tool according to claim 1, it is characterised in that：The working condition of the execution unit includes
Electric current needed for conventional sense and abnormality, the execution unit positioned at abnormality can be provided maximum electricity more than supply line
Stream, when detection module detects execution unit and switches to abnormality by conventional sense, control module control rechargeable battery pair
Executable part is powered；When detection module detects execution unit and switches to conventional sense by abnormality, control module stops
Power supply of the rechargeable battery to execution unit.
4. chargeable electric tool according to claim 1, it is characterised in that：First current control unit is first
Switch control element, the second current control unit be second switch control element, first switch control element respectively with enforcement division
Part is connected with supply line, and second switch control element is connected with rechargeable battery and supply line respectively, first switch control
The control end of element and second switch control element is connected with control module by control module control.
5. the chargeable electric tool according to any claim in Claims 1-4, it is characterised in that：It is described to fill
Electric electric tool also includes the indicating module for being used to indicate whether charging complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310237430.0A CN104242363B (en) | 2013-06-14 | 2013-06-14 | Chargeable electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310237430.0A CN104242363B (en) | 2013-06-14 | 2013-06-14 | Chargeable electric tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104242363A CN104242363A (en) | 2014-12-24 |
| CN104242363B true CN104242363B (en) | 2017-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310237430.0A Active CN104242363B (en) | 2013-06-14 | 2013-06-14 | Chargeable electric tool |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2605970Y (en) * | 2003-03-06 | 2004-03-10 | 上海锐晟五金工具有限公司 | Charging and using parallel power tools |
| CN101944758A (en) * | 2010-09-24 | 2011-01-12 | 鸿富锦精密工业（深圳）有限公司 | Battery management system with function of dynamically assigning charging current and method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7804278B2 (en) * | 2007-02-16 | 2010-09-28 | O2Micro International Ltd. | Topology and method for dynamic charging current allocation |
| JP4805223B2 (en) * | 2007-07-27 | 2011-11-02 | レノボ・シンガポール・プライベート・リミテッド | Charging system and charging method |
-
2013
- 2013-06-14 CN CN201310237430.0A patent/CN104242363B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2605970Y (en) * | 2003-03-06 | 2004-03-10 | 上海锐晟五金工具有限公司 | Charging and using parallel power tools |
| CN101944758A (en) * | 2010-09-24 | 2011-01-12 | 鸿富锦精密工业（深圳）有限公司 | Battery management system with function of dynamically assigning charging current and method thereof |
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| Publication number | Publication date |
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| CN104242363A (en) | 2014-12-24 |
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