CN104242363A - Rechargeable electric tool - Google Patents
Rechargeable electric tool Download PDFInfo
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- CN104242363A CN104242363A CN201310237430.0A CN201310237430A CN104242363A CN 104242363 A CN104242363 A CN 104242363A CN 201310237430 A CN201310237430 A CN 201310237430A CN 104242363 A CN104242363 A CN 104242363A
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- rechargeable battery
- execution unit
- current
- module
- electric tool
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Abstract
The invention provides a rechargeable electric tool. The rechargeable electric tool comprises a power-driven executive component, a rechargeable battery providing power for the executive component and a power supply circuit connected with an external charger and providing power for the electric tool and the rechargeable battery at the same time. The rechargeable electric tool further comprises a current distribution module, a control module and a detection module, the detection module detects the working state of a motor and the charging state of the rechargeable battery, the control module controls the current distribution module to work according to detection results of the detection module, and the current distribution module controls currents provided by the power supply circuit for the motor and the rechargeable battery according to control signals transmitted by the control module. As the currents provided for the motor and the rechargeable battery can be flexibly adjusted through the current distribution module, the sum of the currents output to the motor and the rechargeable battery from the charger can be smaller than the sum of currents allowing normal work of the motor and normal charging of the rechargeable battery, the output currents of the charger become smaller, and the cost of the charger is low.
Description
Technical field
The present invention relates to a kind of electric tool, particularly relate to a kind of chargeable electric tool.
Background technology
Electric tool provides energy for electric tool in order to the rechargeable battery that generally can adopt easy to use.Such electric tool just need not carry out work by electric wire in use in tow.After the electricity in rechargeable battery is finished, need to charge to rechargeable battery.Now, may electric tool be also needed to work on.That is charging limit, electric tool limit is needed to work.
For this type electric tool, the charging current I of charger with matching need be greater than power stage electric current I 1 and battery charge I2 sum, to ensure the requirement realizing work and charging simultaneously.I.e. output current of charger I >=I1+I2.Like this, just require that the charging current of charger is comparatively large, the volume of charger will be comparatively large, and the cost of charger also can be higher.In addition, when electric tool does not work, the output current of charger all can supply rechargeable battery, the charging current of rechargeable battery can be caused excessive, affect the useful life of rechargeable battery.
Summary of the invention
Based on this, be necessary to provide a kind of chargeable electric tool, it can reduce the cost of charger.
A kind of chargeable electric tool, comprise: power-actuated execution unit, there is provided the rechargeable battery of electric power for described execution unit and to be connected with external charger and simultaneously for electric tool and rechargeable battery provide the supply line of electric power, described chargeable electric tool also comprises in supply line and the electric current distribution module between execution unit and rechargeable battery, control module and detection module, described detection module detects operating state and the rechargeable battery operating state of execution unit, described control module obtains the testing result of detection module and generates control signal, described electric current distribution module distributes to the current ratio of execution unit and rechargeable battery according to the control signal adjustment supply line that control module transmits.
Wherein in an embodiment, the operating state of described execution unit comprises small area analysis running status and big current running status, when detection module detects that execution unit is switched to small area analysis running status, electric current distribution module reduces the current ratio that supply line is passed to execution unit; When detection module detects that execution unit is switched to big current running status, electric current distribution module increases the current ratio that supply line is passed to execution unit.
Wherein in an embodiment, described electric current distribution module controls to be no more than its maximum charging current all the time to the charging current of rechargeable battery.
Wherein in an embodiment, the operating state of described execution unit comprises conventional sense and abnormality, needed for the execution unit being positioned at abnormality, electric current exceedes supply line can provide maximum current, when detection module detects that execution unit switches to abnormality by conventional sense, control module controls rechargeable battery to powering by execution unit; When detection module detects that execution unit switches to conventional sense by abnormality, control module stops rechargeable battery to the power supply of execution unit.
Wherein in an embodiment, described electric current distribution module comprises the first current control unit and the second current control unit that control size of current, described first current control unit is connected between described supply line and described execution unit, and described second current control unit is connected between described supply line and described rechargeable battery.
Wherein in an embodiment, described first current control unit is the first switch control element, second current control unit is second switch control element, first switch control element is connected with supply line with execution unit respectively, second switch control element is connected with supply line with rechargeable battery respectively, and the control end of the first switch control element and second switch control element is connected with control module and controls by control module.
Wherein in an embodiment, between described execution unit and described first current control unit, be connected with the status switch controlling execution unit work.
Wherein in an embodiment, described chargeable electric tool also comprises the indicating module being used to indicate whether charging complete.
The operating state of motor that above-mentioned chargeable electric tool is detected according to detection module by control module and the charged state of rechargeable battery control electric current module assigns supplies motor and rechargeable battery electric current from charging inlet, can turn down when machine operation or mediate the electric current flowing to rechargeable battery like this, when motor does not work, heighten the electric current flowing to rechargeable battery.Because electric current distribution module can adjust the electric current being supplied to motor and rechargeable battery flexibly, so the electric current sum exporting motor and rechargeable battery to from charger just can be less than motor normally work and rechargeable battery charges normal time electric current sum, the output current of charger diminishes, and the cost of charger is also just lower.
Accompanying drawing explanation
Fig. 1 is the charging circuit functional block diagram of the chargeable electric tool of an embodiment;
Fig. 2 is the charging circuit figure of electric tool chargeable shown in Fig. 1.
Electric current distribution module 110 control module 120 detection module 130 motor 140
Rechargeable battery 150 indicating module 160 charger 200 first field-effect transistor Q1
Second field-effect transistor Q2 second field-effect transistor Q3 status switch S
Embodiment
Please refer to Fig. 1, an embodiment provides a kind of chargeable electric tool.This chargeable electric tool comprises execution unit, provides the rechargeable battery 150 of energy for execution unit and is connected to external charger 200 supply line that electric tool provides energy.Between execution unit external charger 200 and rechargeable battery 150 and being connected by supply line with between external charger 200.This chargeable electric tool can be electric drill, electric grinder, electric wrench, electric screwdriver, sound equipment etc., and execution unit can drill bit, emery wheel, audio-frequency module etc.This chargeable electric tool also comprises electric current distribution module 110, control module 120, detection module 130 and indicating module 160.Execution unit is herein motor 140, and execution unit also can be audio-frequency module in other embodiments.Being connected with external charger 200, rechargeable battery 150 and barycenter parts of electric current distribution module 110.Detection module 130 detects the operating state of execution unit (i.e. motor 140) and the operating state of rechargeable battery 150, control module 120 obtains the testing result of detection module 130 and generates control signal, the current ratio that the control signal adjustment motor 140 that electric current distribution module 110 transmits according to control module 120 obtains with rechargeable battery 150, indicating module 160 is connected with control module 120, is used to refer to whether charging complete.When rechargeable battery 150 charging complete, control module 120 controls indicating module 160 and indicates charging complete.
In addition, when detection module 130 detects that motor 140 is in starting state, electric current distribution module 110 increases the current ratio that supply line is passed to motor 140; When detection module 130 detects that motor 140 is in off state, electric current distribution module 110 reduces the current ratio that supply line is passed to motor 140.Electric current distribution module 110 controls to be no more than its maximum charging current all the time to the charging current of rechargeable battery 150.Can ensure that rechargeable battery 150 is in a safe condition in charging process like this.
Herein, the operating state of execution unit (i.e. motor 140) comprises small area analysis running status and big current running status.When detection module 130 detects that execution unit (i.e. motor 140) is switched to small area analysis running status, electric current distribution module 110 reduces the current ratio that supply line is passed to execution unit; When detection module 130 detects that execution unit is switched to big current running status, electric current distribution module 110 increases the current ratio that supply line is passed to execution unit.The operating state of execution unit also comprises conventional sense and abnormality.When execution unit is in conventional sense, the electric current needed for it is less than the electric current that charger 200 can provide; When execution unit is in abnormal starting state, the electric current needed for it is greater than the electric current that charger 200 can provide.When detection module 130 detects that execution unit switches to abnormality constantly by conventional sense, control module 120 controls rechargeable battery 150 pairs of execution units and powers, and electric current distribution module 110 turns off the charging current to rechargeable battery 150 simultaneously.When detection module 130 detects that execution unit switches to conventional sense by abnormality, control module 120 stops the power supply of rechargeable battery 150 pairs of execution units.The operating state of rechargeable battery 150 comprises rechargeable battery whether charging complete two states.When rechargeable battery 150 charging complete, electric current distribution module 110 no longer will distribute electric current for rechargeable battery 150.Rechargeable battery 150 in this embodiment can be lithium ion battery or lead accumulator.
In addition, steady flow unit is connected with between supply line and electric current distribution module 110.Steady flow unit can make from supply line's input current distribution module 110 more stable, thus plays the effect of protection motor 140 and rechargeable battery 150.
Concrete, the electric current distribution module 110 of this chargeable electric tool comprises the first current control unit and the second current control unit that control size of current.First current control unit is connected between supply line and motor 140, and the second current control unit is connected between supply line and rechargeable battery 150.Wherein, first current control unit is the first switch control element, second current control unit is second switch control element, first switch control element is connected with supply line with execution unit respectively, second switch control element is connected with supply line with rechargeable battery respectively, and the control end of switch control element and second switch control element is connected with control module 120 and controls by control module 120.
Please refer to Fig. 2, the first switch control element and second switch control element are field-effect transistor.Wherein, the first current control unit is the first field-effect transistor Q1 second current control unit is the second field-effect transistor Q2.The source electrode of the first field-effect transistor Q1 is connected with supply line with motor 140 respectively with drain electrode, and the source electrode of the second field-effect transistor Q2 is connected with supply line with rechargeable battery 150 respectively with drain electrode.First field-effect transistor Q1 is all connected with control module 120 with the grid of the second field-effect transistor Q2.The operating state of motor 140 that control module 120 can detect according to detection module 130 and the charged state of rechargeable battery 150 carry out the size of control flow check through the electric current of the first field-effect transistor Q1 and the second field-effect transistor Q2.Control module 120 is herein single-chip microcomputer.This control module 120 can also control the work of this chargeable other module of electric tool.
The status switch S controlling machine operation is connected with between motor 140 and the first current control unit.When the status switch S rear motor 140 that closes is started working.Cell switch is connected with between status switch S and rechargeable battery 150.Cell switch is also field-effect transistor, and cell switch is the 3rd field-effect transistor Q3 herein.The source electrode of the 3rd field-effect transistor Q3 is connected with rechargeable battery 150 with status switch S respectively with drain electrode, and the grid of the 3rd field-effect transistor Q3 is connected with control module 120.When occurring particular case, when the electric current required for motor 140 is greater than the electric current of supply line's input, the 3rd field-effect transistor Q3 can open, and such rechargeable battery 150 can be powered for motor 140 simultaneously.The electric current that motor 140 obtains will be comparatively large, thus meet the demand of motor 140.Certainly, the time that this particular case continues can not be oversize.The 3rd field-effect transistor Q3 just can be closed after particular case terminates.
When the electricity in rechargeable battery 150 is finished, the supply line of this chargeable electric tool can be connected with charger 200, and charger 200 will charge for rechargeable battery 150.When detection module 130 detects that motor 140 does not work, control module 120 by closedown first field-effect transistor Q1 and the 3rd field-effect transistor Q3, and controls by adjustment second field-effect transistor Q2 the charging current entering rechargeable battery 150.Now, the charging current that rechargeable battery 150 obtains is optimal charge electric current.That is, the charging current now inputting rechargeable battery 150 not only can not damage rechargeable battery 150 but also can ensure to complete charging fast.
When detection module 130 detects that motor 140 needs work (now motor 140 is operating state), control module 120 can judge the operating state of motor 140 further by detection module 130, namely judge the size of the operating current required for motor 140.When the operating current required for motor 140 be not more than charger 200 be input to the electric current of supply line time, control module 120 is by closedown the 3rd field-effect transistor Q3, and the electric current entering motor 140 and rechargeable battery 150 by regulating the first field-effect transistor Q1 and the second field-effect transistor Q2 to distribute control.Now preferentially can meet motor 140 to work required electric current, remaining electric current is supplied to rechargeable battery 150.
When detection module 130 detects that motor 140 needs work, and control module 120 by the operating current that detection module 130 is judged required for motor 140 be greater than charger 200 be input to the electric current of supply line time, control module 120 is by closedown second field-effect transistor Q2, and the electric current entering motor 140 by regulating the first field-effect transistor Q1 and the 3rd field-effect transistor Q3 to distribute control.Now preferentially can obtain electric current from charger 200, remaining electric current obtains from rechargeable battery 150 again.
When detection module 130 detects rechargeable battery 150 charging complete (now rechargeable battery 150 is in charging complete state), control module 120 is by closedown second field-effect transistor Q2, control indicating module 160 simultaneously and show charging complete, pull out charger 200 to remind operator.If operator pulls out charger 200, the electric current required for motor will be provided by rechargeable battery 150.Now control module 120 can be opened the 3rd field-effect transistor Q3 or open the first field-effect transistor Q1 and the second field-effect transistor Q2 simultaneously.If operator is for pulling out charger 200, control module 120 can regulate the first field-effect transistor Q1, by charger 200 for motor 140 provides electric current.When occurring that the electric current required for motor 140 is greater than the special circumstances of the electric current of supply line's input, control module 120 can regulate the first field-effect transistor Q1 and the 3rd field-effect transistor Q3 to think that motor 140 is powered simultaneously.
The supply line of this chargeable electric tool is connected when charging to rechargeable battery 150 with charger 200, can detect motor 140 the need of work by detection module 130, and then the electric current inputted by electric current distribution module 110 pairs of supply lines distributes.Due to the existence of electric current distribution module 110, the electric current flowing into motor 140 and rechargeable battery 150 just can distribute as required, and preferentially ensures the electric current needed for motor 140.Like this, the electric current that charger 200 exports just can be less than motor 140, and normally work and rechargeable battery 150 charge normal required electric current sum.The output current of charger 200 reduces relative to the output current of conventional charger, and the cost of charger 200 just can reduce, and the volume of charger 200 also can reduce.In addition, because electric current distribution module 110 can control the electric current 150 flowing into rechargeable battery, charging current when rechargeable battery 150 charges just can be controlled in suitable size, thus prevents excessive charging current from damaging rechargeable battery 150.Like this, the life-span of rechargeable battery 150 just can be extended.
The operating state of motor that this chargeable electric tool is detected according to detection module by control module and the charged state of rechargeable battery control electric current module assigns supplies motor and rechargeable battery electric current from supply line, can turn down when machine operation or mediate the electric current flowing to rechargeable battery like this, when motor does not work, heighten the electric current flowing to rechargeable battery.Because electric current distribution module can adjust the electric current being supplied to motor and rechargeable battery flexibly, so the electric current sum exporting motor and rechargeable battery to from charger just can be less than motor normally work and rechargeable battery charges normal time electric current sum, the output current of charger diminishes, and the cost of charger is also just lower.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a chargeable electric tool, comprise: power-actuated execution unit, there is provided the rechargeable battery of electric power for described execution unit and to be connected with external charger and simultaneously for electric tool and rechargeable battery provide the supply line of electric power, it is characterized in that: described chargeable electric tool also comprises in supply line and the electric current distribution module between execution unit and rechargeable battery, control module and detection module, described detection module detects operating state and the rechargeable battery operating state of execution unit, described control module obtains the testing result of detection module and generates control signal, described electric current distribution module distributes to the current ratio of execution unit and rechargeable battery according to the control signal adjustment supply line that control module transmits.
2. chargeable electric tool according to claim 1, it is characterized in that: the operating state of described execution unit comprises small area analysis running status and big current running status, when detection module detects that execution unit is switched to small area analysis running status, electric current distribution module reduces the current ratio that supply line is passed to execution unit; When detection module detects that execution unit is switched to big current running status, electric current distribution module increases the current ratio that supply line is passed to execution unit.
3. chargeable electric tool according to claim 2, is characterized in that: described electric current distribution module controls to be no more than its maximum charging current all the time to the charging current of rechargeable battery.
4. chargeable electric tool according to claim 2, it is characterized in that: the operating state of described execution unit comprises conventional sense and abnormality, needed for the execution unit being positioned at abnormality, electric current exceedes supply line can provide maximum current, when detection module detects that execution unit switches to abnormality by conventional sense, control module controls rechargeable battery to powering by execution unit; When detection module detects that execution unit switches to conventional sense by abnormality, control module stops rechargeable battery to the power supply of execution unit.
5. chargeable electric tool according to claim 2, it is characterized in that: described electric current distribution module comprises the first current control unit and the second current control unit that control size of current, described first current control unit is connected between described supply line and described execution unit, and described second current control unit is connected between described supply line and described rechargeable battery.
6. chargeable electric tool according to claim 5, it is characterized in that: described first current control unit is the first switch control element, second current control unit is second switch control element, first switch control element is connected with supply line with execution unit respectively, second switch control element is connected with supply line with rechargeable battery respectively, and the control end of the first switch control element and second switch control element is connected with control module and controls by control module.
7. chargeable electric tool according to claim 5, is characterized in that: be connected with the status switch controlling execution unit work between described execution unit and described first current control unit.
8. the chargeable electric tool according to claim arbitrary in claim 1 to 7, is characterized in that: described chargeable electric tool also comprises the indicating module being used to indicate whether charging complete.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310237430.0A CN104242363B (en) | 2013-06-14 | 2013-06-14 | Chargeable electric tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310237430.0A CN104242363B (en) | 2013-06-14 | 2013-06-14 | Chargeable electric tool |
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| CN104242363A true CN104242363A (en) | 2014-12-24 |
| CN104242363B CN104242363B (en) | 2017-10-10 |
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Citations (4)
| 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 | Electric tool usable while charging |
| CN101286649A (en) * | 2007-02-16 | 2008-10-15 | 凹凸电子（武汉）有限公司 | Battery management system, electronic apparatus and method for charging battery |
| US20090027013A1 (en) * | 2007-07-27 | 2009-01-29 | Shigefumi Odaohhara | Method and Apparatus for Charging Batteries |
| 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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2013
- 2013-06-14 CN CN201310237430.0A patent/CN104242363B/en active Active
Patent Citations (4)
| 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 | Electric tool usable while charging |
| CN101286649A (en) * | 2007-02-16 | 2008-10-15 | 凹凸电子（武汉）有限公司 | Battery management system, electronic apparatus and method for charging battery |
| US20090027013A1 (en) * | 2007-07-27 | 2009-01-29 | Shigefumi Odaohhara | Method and Apparatus for Charging Batteries |
| 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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| CN104242363B (en) | 2017-10-10 |
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