CN106514569B - A kind of voltage transformation switching device and its voltage transformation method for electric tool - Google Patents
A kind of voltage transformation switching device and its voltage transformation method for electric tool Download PDFInfo
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- CN106514569B CN106514569B CN201610954938.6A CN201610954938A CN106514569B CN 106514569 B CN106514569 B CN 106514569B CN 201610954938 A CN201610954938 A CN 201610954938A CN 106514569 B CN106514569 B CN 106514569B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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Abstract
The present invention relates to field of power tools, and in particular to a kind of voltage transformation switching device and its voltage transformation method for electric tool.Wherein, voltage transformation switching device includes：First voltage conversion module, input terminal are connected with battery pack connector, and output end is connected with the pole piece of electric tool, and the voltage for exporting battery pack is converted to the voltage needed for electric tool work；Start-up circuit, including second voltage conversion module, input terminal are connected with battery pack connector, and output end is connected with the pole piece of electric tool, start voltage for being provided to electric tool；Start and stop detecting module is connected with the output end of second voltage conversion module, and the electric signal for the output end according to second voltage conversion module judges whether electric tool starts.Through the invention so that the applicability of the voltage transformation switching device of the present embodiment is wide.
Description
Technical field
The present invention relates to field of power tools, and in particular to a kind of voltage transformation switching device for electric tool and its
Voltage transformation method.
Background technology
For battery powered electric tool, due to the charge and discharge protecting standard that each producer, each brand be not unified,
It is also different in structure.Meanwhile for different with place and different business strategies, there is also differences for same producer
The battery pack and tool of voltage；Such result is exactly that market is full of different structure, the battery pack that interface is different, voltage is different
And charger.
Currently, more and more electric tools turn to more portable, more efficient battery powered；And battery pack is easy
Consumption product cause the subsequent battery pack replacement of electric tool to bring many inconvenience：Use the battery pack of same brand, price
It is expensive；It is exactly that no subsequent battery pack is replaceable.In addition possessing the electric tool of different brands simultaneously, battery pack cannot
It mutually uses, reduces the service efficiency of battery pack；For entire society, the battery pack of different voltages also results in battery
Packet type is various, mutually uncurrent waste.
The patent document of Publication No. CN103856048A discloses a kind of DC/DC converters for electric tool, tool
It further includes processing module and output voltage control module that body, which discloses the DC/DC converters, the processing module with it is described defeated
Go out voltage control module to be connected, the output voltage control module is connected with the DC/DC modules, and the processing module passes through institute
The output voltage that output voltage control module controls the DC/DC modules is stated, required output voltage can be thus obtained, from
And the voltage of battery pack output is adapted with the operating voltage needed for the electric tool.
Further, it is also disclosed in the document：The DC/DC converters further include tool switch detection module.The tool
Switch detection module is connected with processing module and electric tool, for judging whether electric tool is working.From the attached of the document
Tool switch detection module disclosed in figure it is found that the tool switch detection module can be only used for detection direct current electric power tools be
It is no to work, and AC electrical tool can not be detected and whether worked, therefore, applicability is limited to.
Invention content
The technical problem to be solved in the present invention is that the electric pressure converter for being used for electric tool in the prior art can not detect
Whether AC electrical tool causes it to use in work is limited, to provide a kind of voltage transformation switching dress for electric tool
It sets and its voltage transformation method.
An embodiment of the present invention provides a kind of voltage transformation switching devices for electric tool, including：First voltage becomes
Block is changed the mold, input terminal is connected with battery pack connector, and output end is connected with the pole piece of electric tool, is used for the battery
The voltage of packet output is converted to the voltage needed for the electric tool work；Start-up circuit, including second voltage conversion module, it is defeated
Enter end with the battery pack connector to be connected, output end is connected with the pole piece of electric tool, is used for the electric tool
It provides and starts voltage；Start and stop detecting module is connected with the output end of the second voltage conversion module, for according to described the
The electric signal of the output end of two voltage transformation modules judges whether the electric tool starts, wherein is opened in the electric tool
In the case of dynamic, the first voltage conversion module starts and exports the voltage needed for the electric tool work.
Further, the electric tool includes：Control panel and motor, the control panel are opened for controlling the motor
It is dynamic, wherein the first voltage conversion module is used to provide the voltage needed for its work to the motor；The second voltage becomes
Block is changed the mold to be used to provide the startup voltage to the control panel.
Further, the power of the second voltage conversion module is less than the power of the first voltage conversion module.
Further, the start-up circuit further includes：Diode is connected on the output of the second voltage conversion module
End, the unidirectional output for controlling the second voltage conversion module.
Further, the first voltage conversion module be DC/DC modules, the input terminal of the DC/DC modules homopolarity with
It is direct-connected by through swtich between output end, it is in the electricity needed for electric tool work in the output voltage of the battery pack
In the case of pressing in range, controls the through swtich and be closed.
Further, further include：Controller is connected with the first voltage conversion module, for first electricity
Pressure conversion module is controlled；Power module is respectively connected with the controller and the start and stop detecting module, is used for institute
State controller power supply, wherein the start and stop detecting module controls the power module in the case where the electric tool starts
Start.
Further, further include：Signal imitation module, with the controller, the power module and the control panel point
It is not connected, the information of voltage needed for the electric tool work is obtained for being communicated with the control panel.
Further, the controller is additionally operable to the information of voltage of detection battery pack, and in the output of battery pack electricity
In the case that pressure is in the voltage range needed for electric tool work, controls the through swtich and be closed.
Further, the controller includes：Voltage detection module, the information of voltage for detecting the battery pack；Electricity
Flow detection module, the current information for detecting the battery pack；Temperature detecting module, the temperature for detecting the battery pack
Information；And control module, it is respectively connected with the voltage detection module, current detection module and temperature detecting module.
Further, further include：Alarm module is connected with the controller, for exporting prompt messages.
The embodiment of the present invention additionally provides a kind of voltage transformation method for electric tool, including：Detect electric tool
Whether start；In the case where the electric tool starts, the information of voltage of battery pack is detected；In the output electricity of the battery pack
In the case that pressure is in the voltage range needed for electric tool work, control through swtich is closed, and does not start the first electricity
Press conversion module；It is in the situation outside the voltage range needed for electric tool work in the output voltage of the battery pack
Under, start the first voltage conversion module, the output voltage to control first voltage conversion module is in the electric tool
In voltage range needed for work.
Further, after electric tool startup, the method further includes：Judge the output electricity of the battery pack
Whether pressure is less than default protection voltage；In the case where the output voltage of the battery pack is less than default protection voltage, institute is controlled
Through swtich disconnection is stated, or stops the first voltage conversion module.
According to embodiments of the present invention, due to whether detecting electric tool by using start-up circuit and start and stop detecting module
Start, wherein start-up circuit includes second voltage conversion module, starts voltage for being provided to electric tool, can be adapted for
AC electrical tool or direct current electric power tools so that the applicability of the voltage transformation switching device of the present embodiment is wide.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is showing for a specific example of the voltage transformation switching device that electric tool is used in the embodiment of the present invention 1
It is intended to；
Fig. 2 is another specific example of the voltage transformation switching device for electric tool in the embodiment of the present invention 1
Schematic diagram；
Fig. 3 is the boosting curve synoptic diagram of first voltage conversion module in the embodiment of the present invention 1；
Fig. 4 is the drawdown curve schematic diagram of first voltage conversion module in the embodiment of the present invention 1；
Fig. 5 is the flow chart of a specific example of voltage transformation method in the embodiment of the present invention 2.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements, can be wirelessly connected, can also be wired connection.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can be combined with each other at conflict.
Embodiment 1
The present embodiment provides a kind of voltage transformation switching device for electric tool, which can make same money electricity
Chi Bao is used for different voltages（Including exchange or direct current）The electric tool of demand.
As shown in Figure 1, the voltage transformation switching device 1 includes：First voltage conversion module 11, start-up circuit 12 and start and stop
Detecting module 13.
The input terminal of first voltage conversion module 11 is connected with 2 connector of battery pack, the pole of output end and electric tool 3
Piece is connected, and the voltage for exporting battery pack 2 is converted to electric tool 3 and works required voltage.
First voltage conversion module 11 can be DC/DC（DC to DC）Module can also be DC/AC（Direct current is delivered
Stream）Module can be boost module, can also be voltage reduction module.
Start-up circuit 12 includes second voltage conversion module 121, and input terminal is connected with 2 connector of battery pack, output end
It is connected with the pole piece of electric tool 3, starts voltage for being provided to electric tool 3.In the present embodiment, start electricity by increasing
Road 12 starts voltage, specifically by second voltage conversion module 121 by the output voltage of battery pack 2 for being provided to electric tool 3
It is converted into the startup voltage output of electric tool 3, which can be used for starting the control panel of electric tool 3.When electronic
It when the switch S1 of tool 3 is closed, is formed into a loop between 2 start-up circuit 12 of battery pack and electric tool 3, generates electric current.
Start and stop detecting module 13 is connected with the output end of second voltage conversion module 121, for being become according to second voltage
The electric signal for changing the mold the output end of block 121 judges whether electric tool 3 starts, wherein in the case where electric tool 3 starts,
First voltage conversion module 11, which starts and exports electric tool 3, to work required voltage.Wherein, electric signal can reflect startup electricity
The variation of the output voltage, electric current on road, start and stop detecting module 13 can be according to the signal wire detect start-up circuit 12 voltage,
Curent change, to judge the startup of electric tool 3.
When the switch S1 of electric tool 3 is closed, 121 output voltage of second voltage conversion module；When disconnection, second voltage
Conversion module 121 stops output voltage.Based on the principle, start and stop detecting module 13 is by detecting second voltage conversion module 121
The electric signal of output end may determine that whether the switch of electric tool is closed, and that is to say whether electric tool starts.Only in electricity
In the case that power driven tools 3 start, first voltage conversion module 11, which starts and exports electric tool 3, to work required voltage.If
It is not actuated, or stop, then stop the output of first voltage conversion module 11, to reduce the electric energy of first voltage conversion module 11
Consumption, that improves battery pack uses duration.
According to embodiments of the present invention, due to whether detecting electric tool by using start-up circuit and start and stop detecting module
Start, wherein start-up circuit includes second voltage conversion module, starts voltage for being provided to electric tool, can be adapted for
AC electrical tool or direct current electric power tools so that the applicability of the voltage transformation switching device of the present embodiment is wide.
As shown in Fig. 2, electric tool 3 includes：Control panel PCB and motor M, control panel PCB start for controlling motor M,
First voltage conversion module 11 is used to provide the voltage needed for its work to motor M as a preferred implementation manner,；Second electricity
Conversion module 121 is pressed to be used to provide startup voltage to control panel PCB.
When switch S1 is closed, second voltage conversion module is provided to the control panel of electric tool starts voltage, the control
Plate starts work, and circuit is connected with driving motor（Switch S3 is controlled to connect）.After first voltage conversion module starts, to motor
Voltage needed for output services.Preferably, the power of the second voltage conversion module of the present embodiment is less than first voltage change mold changing
The power of block.
As shown in Fig. 2, the start-up circuit 12 of the present embodiment further includes：Diode 122 is connected on second voltage conversion module
121 output end, the unidirectional output for controlling second voltage conversion module 121.
The start-up circuit of the present embodiment includes at least one low power voltage transformation module and a diode；For
Startup voltage is provided for electric tool, and its output voltage meets in the range needed for electric tool；The voltage transformation module can
Can also be reduction voltage circuit to be booster circuit；Diode is to ensure that the unidirectional output of the low power voltage conversion circuit.
As a kind of optional embodiment, first voltage conversion module 11 is DC/DC modules, and electric tool 3 is direct current
Power driven tools, it is direct-connected by through swtich S2 between the input terminal and output end of DC/DC module homopolarities.In the output electricity of battery pack 2
Pressure in electric tool 3 work required voltage range it is interior in the case of, that is to say that the output voltage of battery pack 2 can be directly to
Electric tool 3 uses, and without carrying out voltage transformation, therefore, control through swtich S2 is closed, by battery pack 2 and electronic work
Tool 3 is directly connected, and to reduce by the electric energy of consumption when the progress voltage transformation of first voltage transform block 11, extends battery pack 2
Use duration.
Through swtich S2 can be the electronic switches such as relay, metal-oxide-semiconductor, IGBT, triode, solid-state relay, pass through control
Device 14 processed carries out break-make control.
When the output voltage of battery pack 2 is in the case that electric tool 3 works outside required voltage range, disconnect straight-through
Switch S2 carries out DC boosting or decompression transformation by first voltage conversion module 11, makes the defeated of first voltage conversion module 11
Go out voltage and be in electric tool 3 to work in required voltage range.
As shown in Figures 3 and 4, electric tool 3 works required voltage range as [U0, U1], wherein Ub is the defeated of battery pack
Go out voltage, Uout is the output voltage of first voltage conversion module 11, and Up is default protection voltage.When the output voltage of battery pack
When Ub is less than U0, then controls first voltage conversion module 11 and boost to it so that the output of first voltage conversion module 11
Voltage Uout is in [U0, U1], as shown in Figure 3；When the output voltage Ub of battery pack is more than U1, then first voltage change is controlled
Mold changing block 11 is depressured it so that the output voltage Uout of first voltage conversion module 11 is in [U0, U1], such as Fig. 4
It is shown.
As shown in Fig. 2, the voltage transformation switching device of the present embodiment further includes：Controller 14 becomes with first voltage and changes the mold
Block 11 is connected, for controlling first voltage conversion module 11；Power module 15 detects mould with controller 14 and start and stop
Block 13 is respectively connected with, for powering to controller 14, wherein start and stop detecting module 13 is in the case where electric tool 3 starts
Power module 15 is controlled to start.Power supply is provided to controller 14 after the startup of power module 15, its is made to start work.It that is to say in electricity
Before power driven tools 3 start, first voltage conversion module 11, power module 15, controller 14 etc. are in inactive state, to
Energy consumption is reduced, the operating time of battery pack 2 is extended.
In the present embodiment, start and stop detecting module 13 is also connect with controller 14, in order to be detectd according to start and stop detecting module 13
The startup situation of the electric tool 3 measured controls first voltage conversion module 11, mainly controls first voltage here
The start and stop of conversion module 11.
Preferably, as shown in Fig. 2, the voltage transformation switching device of the present embodiment further includes：Signal imitation module 16, with control
The control panel PCB of device 14 processed, power module 15 and electric tool 3 is respectively connected with, for being communicated with control panel PCB to obtain
Electric tool 3 is taken to work required information of voltage.
Power module 15 is powered to signal imitation module 16, and controller 14 and control then may be implemented in signal imitation module 16
Data communication between plate PCB, is mainly transferred to controller 14, in order to control by the required information of voltage that works of electric tool 3
Device 14 processed controls the output voltage of voltage transformation switching device.
Preferably, controller 14 is additionally operable to the information of voltage of detection battery pack 2, and is in the output voltage of battery pack 2
In the case that electric tool 3 works in required voltage range, control through swtich S2 is closed.
The workflow of voltage transformation switching device shown in Fig. 2 is specific as follows：
Closure switch S1 starts electric tool 3, by the start-up circuit 12 in parallel with first voltage conversion module 11 and
Start and stop detecting module 13 detects the startup of electric tool 3, and then start and stop detecting module 13 controls the startup of power module 15；Profit
With the startup of power module 15, provides power supply to controller 14 and signal imitation module 16 and be allowed to start to work；Controller 14
After work, by the output voltage information of the battery pack 2 of itself detecting, judge whether that needing to start first voltage becomes mold changing
Block 11；When 2 output voltage of battery pack is normal, and 2 output voltage Ub of battery pack predeterminated voltage U0~U1 models in controller 14
(U0 in enclosing<=Ub<=U1), controller 14 then controls the direct circuit switch S2 in parallel with first voltage conversion module 11 and is closed,
The output of battery pack 2 is directly connected to electric tool 3；Electric tool 3 is started to work；When 2 output voltage of battery pack is normal,
And the output voltage Ub of battery pack 2 (Ub outside predeterminated voltage U0~U1 ranges in controller 14>U1 or Ub<U0), controller 14
Then control the startup of first voltage conversion module 11, it is ensured that 3 obtained voltage of electric tool meets the requirements (U0<=Uout<=U1).
Predeterminated voltage U0~U1 ranges that is to say the electric tool 3 that controller 14 is got from electric tool 3 in controller 14 among the above
Voltage range needed for work.
In addition, presetting protection voltage Up when the output voltage of battery pack 2 is less than in controller 14, it is disconnected that controller then controls S2
It opens and first voltage conversion module 11 does not export, electric tool can not start work.In working condition, if mould is detected in start and stop
Block 13 monitors that electric tool 3 is shut down, and controller 14 then controls S2 disconnections and first voltage conversion module 11 does not export, electronic work
Tool 3 is shut down；It is then shut off power module 15, power cut-off.
In the present embodiment, controller 14 can be unit in order to control（MCU）, 2 voltage of battery pack, electric current, temperature can be carried out
The acquisition and processing of the information such as degree；And it can be to power module 15, first voltage conversion module 11 and signal imitation module 16
It is controlled.Specifically, controller 14 includes：Voltage detection module, the information of voltage for detecting battery pack；Current detecting mould
Block, the current information for detecting battery pack；Temperature detecting module, the temperature information for detecting battery pack；And control mould
Block is respectively connected with voltage detection module, current detection module and temperature detecting module.
Control module primarily serves control action, control battery pack voltage detecting, current detecting and the circuit with battery pack
Connection is also prevented from the voltage of battery pack 2 or electric current is excessive is damaged to electric tool 3 for protecting battery pack 2.
In the present embodiment, controller 14 can also be by detecting the operating voltage of electric tool 3, operating current, to judge
Electric tool 3 is in unloaded, middle load, heavy duty, and controls first voltage conversion module voltage output, to reach energy saving and work
The balance of efficiency.
In the present embodiment, temperature control modules, the temperature control modules and the present embodiment are additionally provided in the battery pack
Voltage transformation switching device controller be connected.
In the embodiment of the present invention, after controller starts work, it can be believed by the battery pack that battery pack connection sheet transmits
Whether breath and the battery pack job information of itself detecting, detecting battery pack state are normal.Specifically, electric tool is in work
During work, controller works always, the information for the battery pack work state information and battery pack itself that controller is detected
It compares, if the information of comparison is within normal range (NR), battery pack is in normal operating conditions；If the information of comparison is not
Within normal range (NR), then battery pack protection module can detect that battery pack state is abnormal.Wherein, battery pack information includes electricity
Type, voltage, temperature and the current information of Chi Bao；The battery pack job information of the battery pack protection module detecting includes battery
Voltage, electric current and the temperature information of packet during the work time.
When the controller detects that battery pack state is abnormal, controller targetedly starts in real time according to battery Packet type
Protection, and protection information is converted into the protection information that electric tool can be parsed and be received by signal imitation module, start electricity
The defencive function of power driven tools itself, electric tool are shut down, power cut-off.After the defencive function of electric tool startup itself, electricity
Power driven tools are shut down, and will not be damaged in this way to electric tool, and the effect of protection electric tool is effectively played.
Preferably, the voltage transformation switching device of the present embodiment further includes：Alarm module is connected with controller, is used for
Export prompt messages.The alarm module includes warning lamp（Such as LED light）And/or buzzer.When electric tool or battery pack
Working condition is in guard mode, alarmed by buzzer buzzing and warning lamp turn colors or flicker alarm.
During electric tool is in running order, if start and stop detecting module monitors that electric tool is shut down, controller utilizes
Signal imitation module sends out abnormal signal imitation, then controls alarm module and sends out alarm, is then turned off control loop,
The circuit for cutting off battery pack and electric tool connects, and closes power module, power cut-off.
Whether above-mentioned alarm module can remind the working condition of user of service's electric tool and battery pack normal in real time.Its
In, what start and stop detecting module was detected is the start and stop information of electric tool, and controller then mainly monitors the working condition of battery pack, by
The two cooperation detecting electric tool and battery pack, it is possible to determine that the problem of being battery pack or electric tool, user can be allowed
It is alarmed by buzzer buzzing and LED light turn colors either flickers warning message judgement is orderly closedown or abnormal stops
Machine.
The voltage transformation switching device of the present embodiment includes mainly shell, tool connection sheet, battery pack in structure design
Connection sheet and changeover mechanism, wherein the changeover mechanism is set to the enclosure, and the tool connection sheet is set to described
Case top matches with the pole piece of electric tool, and the battery pack connection sheet is set to the housing bottom, with battery pack
Pole piece matches, and one end of the tool connection sheet is connected through changeover mechanism with the battery pack connection sheet, the shell bottom
Portion is clamped with the battery pack, is connected with cover top portion clamping at the top of the electric tool.
Voltage transformation switching device in the present embodiment can be in its structure design：Voltage transformation switching device bottom
Portion is connected with the top of battery pack, and top is connected with the bottom of electric tool；The voltage transformation switching device includes shell, work
Have connection sheet, battery pack connection sheet and changeover mechanism, wherein among the above the first voltage conversion module, start-up circuit, open
Stop detecting module, controller, power module, signal imitation module etc. to be arranged in changeover mechanism, the changeover mechanism setting
In the enclosure, the tool connection sheet is set to the case top, matches with the pole piece of electric tool, the electricity
Pond packet connection sheet is set to the housing bottom, matches with the pole piece of battery pack, and one end of the tool connection sheet is through turning
Connection mechanism is connected with the battery pack connection sheet, and the outer casing bottom and the battery pack are clamped, at the top of the electric tool with
The cover top portion clamping is connected.
In the present embodiment, battery pack two bottom sides are equipped with sliding slot, and the two bottom sides of corresponding shell are equipped with card, card
It inserts in sliding slot, realizes that the clamping of shell and battery pack is installed, wherein during shell and battery pack clamping are installed, electricity
Pond packet connection sheet is matched with the pole piece at the top of battery pack, realizes electrical connection, and the positive and negative anodes of battery pack and battery pack are detected signal
It is transmitted in changeover mechanism, is handled using changeover mechanism.Cover top portion is equipped with upper hopper chute and tool connection sheet, electric tool
Bottom is equipped with lower card and pole piece, and lower card inserts in upper hopper chute, realizes the connection of shell and electric tool, while tool connects
Piece is matched with the pole piece of electric tool bottom, realizes electrical connection, by the positive and negative anodes of electric tool and switching on and shutting down signal transmission in turning
In connection mechanism, handled using changeover mechanism.In the present embodiment, shell is played for connecting electric tool and battery pack
It is connected and fixed effect, battery pack connection sheet and electric tool connection sheet play connection battery pack and electric tool electric energy and information
Effect, changeover mechanism play the role of information monitoring and processing.
In the present embodiment, in actual use, the position of tool connection sheet and battery pack connection sheet, according to different manufacturers
And the battery pack or electric tool of unlike signal are assembled, it is ensured that tool connection sheet can be electrically connected with the pole piece of electric tool,
Battery pack connection sheet can be electrically connected with the pole piece of battery pack, it is ensured that electric tool is electrically connected through switching device with battery pack.
Based on above description, the embodiment of the present invention has following advantages compared with prior art：
1, in the present invention by the setting of voltage transformation switching device, using the setting of switching device, different brands or
The electric tool of model can be used for matching different battery packs, reduce the waste of resource, reduce the cost of user；
2, the electric tool and battery pack that cage connection distinct interface is utilized in the embodiment of the present invention, are connected using battery pack
Piece matches the pole piece of respective battery packet, and the pole piece of electric tool is matched using tool connection sheet, and changeover mechanism is recycled to play electricity
Gas be connected to and protective effect, realize electric tool matching different brands or model battery pack, with previous electric tool can only
Battery pack with same brand or same model is compared, sharp between same electric tool and different brands or different model battery pack
Use can be connected with switching device, not only reduces the cost of user, while also reducing the waste of resource, is easy to use
Person manages.
Embodiment 2
Originally it applies example and a kind of voltage transformation method for electric tool is provided, this method can be used for the embodiment of the present invention 1
The voltage transformation switching device, below component involved in method description with voltage transformation described in embodiment 1
The component being previously mentioned in switching device is identical.As shown in figure 5, this method includes：
Whether step S501, detection electric tool start；
Step S502 detects the information of voltage of battery pack in the case where electric tool starts；
Step S503, in the case where the output voltage of battery pack is in the required voltage range of electric tool work,
It controls through swtich to be closed, does not start first voltage conversion module；
Step S504, in the case where the output voltage of battery pack is in outside the required voltage range of electric tool work,
Start first voltage conversion module, the output voltage to control first voltage conversion module is in the electricity needed for electric tool work
It presses in range.
Specifically, closure switch S1 starts electric tool 3, passes through the startup electricity in parallel with first voltage conversion module 11
Road 12 and start and stop detecting module 13 detect the startup of electric tool 3, and then start and stop detecting module 13 controls power module 15
Startup；Using the startup of power module 15, provides power supply to controller 14 and signal imitation module 16 and be allowed to start to work；
After controller 14 works, by the output voltage information of the battery pack 2 of itself detecting, judge whether to need to start the first electricity
Press conversion module 11；When 2 output voltage of battery pack is normal, and 2 output voltage Ub of battery pack predeterminated voltages in controller 14
(U0 within the scope of U0~U1<=Ub<=U1), controller 14 then controls the direct circuit switch in parallel with first voltage conversion module 11
S2 is closed, and the output of battery pack 2 is directly connected to electric tool 3；Electric tool 3 is started to work；In 2 output voltage of battery pack
When normal, and the output voltage Ub of battery pack 2 (Ub outside predeterminated voltage U0~U1 ranges in controller 14>U1 or Ub<U0), control
Device 14 processed then controls the startup of first voltage conversion module 11, it is ensured that 3 obtained voltage of electric tool meets the requirements (U0<=Uout
<=U1).To that is to say that controller 14 is got from electric tool 3 electronic for predeterminated voltage U0~U1 ranges in controller 14 among the above
Tool 3 works required voltage range.
According to embodiments of the present invention, the electricity of electric tool is adjusted the output to by the information of voltage of the battery pack detected
Pressure may be implemented a kind of battery pack adaptation different type electric tool, reduce battery pack type and also reduce use cost.
Preferably, after electric tool startup, method further includes：It is default to judge whether the output voltage of battery pack is less than
Protect voltage；In the case where the output voltage of battery pack is less than default protection voltage, control through swtich disconnects, or stops
First voltage conversion module.
When battery pack 2 output voltage be less than controller 14 in preset protection voltage Up, controller then control S2 disconnect and
First voltage conversion module 11 does not export, and electric tool can not start work.In working condition, if start and stop detecting module 13
Monitor that electric tool 3 is shut down, controller 14 then controls S2 disconnections and first voltage conversion module 11 does not export, electric tool 3
It shuts down；It is then shut off power module 15, power cut-off.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of voltage transformation switching device for electric tool, which is characterized in that including：
First voltage conversion module, input terminal are connected with battery pack connector, and output end is connected with the pole piece of electric tool,
Voltage for exporting the battery pack is converted to the voltage needed for the electric tool work；
Start-up circuit, including second voltage conversion module, input terminal are connected with the battery pack connector, output end with it is electronic
The pole piece of tool is connected, and starts voltage for being provided to the electric tool；
Start and stop detecting module is connected with the output end of the second voltage conversion module, for being become according to the second voltage
The electric signal for changing the mold the output end of block judges whether the electric tool starts, wherein the case where the electric tool starts
Under, the first voltage conversion module starts and exports the voltage needed for the electric tool work；
The electric tool includes control panel, the electric motor starting for controlling electric tool；
The voltage transformation switching device further includes：
Signal imitation module is connected with the control panel, for being communicated with the control panel to obtain the electronic work
Has the information of voltage needed for work.
2. voltage transformation switching device according to claim 1, which is characterized in that
The first voltage conversion module is used to provide the voltage needed for its work to the motor；
The second voltage conversion module is used to provide the startup voltage to the control panel.
3. voltage transformation switching device according to claim 1 or 2, which is characterized in that the second voltage conversion module
Power be less than the first voltage conversion module power.
4. voltage transformation switching device according to claim 1 or 2, which is characterized in that the start-up circuit further includes：Two
Pole pipe is connected on the output end of the second voltage conversion module, for controlling the unidirectional defeated of the second voltage conversion module
Go out.
5. voltage transformation switching device according to claim 1, which is characterized in that the first voltage conversion module is
DC/DC modules, it is direct-connected by through swtich between the input terminal and output end of the DC/DC modules homopolarity, in the battery pack
Output voltage be in the voltage range needed for electric tool work in the case of, control the through swtich and be closed.
6. the voltage transformation switching device according to claims 1 or 2 or 5, which is characterized in that further include：
Controller is connected with the first voltage conversion module, for controlling the first voltage conversion module；
Power module is respectively connected with the controller and the start and stop detecting module, for powering to the controller,
In, the start and stop detecting module controls the power module in the case where the electric tool starts and starts.
7. voltage transformation switching device according to claim 6, which is characterized in that the signal imitation module also with it is described
Controller, the power module are respectively connected with.
8. voltage transformation switching device according to claim 7, which is characterized in that the controller includes：
Voltage detection module, the information of voltage for detecting the battery pack；
Current detection module, the current information for detecting the battery pack；
Temperature detecting module, the temperature information for detecting the battery pack；And
Control module is respectively connected with the voltage detection module, current detection module and temperature detecting module.
9. a kind of voltage transformation method for electric tool, which is characterized in that including：
Whether detection electric tool starts；
In the case where the electric tool starts, the information of voltage of battery pack is detected；
In the case of in voltage range needed for the output voltage of the battery pack is in electric tool work, control is straight
It opens up closing to close, does not start first voltage conversion module；
In the case of outside voltage range needed for the output voltage of the battery pack is in electric tool work, start institute
First voltage conversion module is stated, the output voltage to control first voltage conversion module is in needed for electric tool work
In voltage range.
10. voltage transformation method according to claim 9, which is characterized in that described after electric tool startup
Method further includes：
Judge whether the output voltage of the battery pack is less than default protection voltage；
In the case where the output voltage of the battery pack is less than default protection voltage, controls the through swtich and disconnect, or
Stop the first voltage conversion module.
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| CN201610954938.6A CN106514569B (en) | 2016-11-03 | 2016-11-03 | A kind of voltage transformation switching device and its voltage transformation method for electric tool |
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| CN201610954938.6A CN106514569B (en) | 2016-11-03 | 2016-11-03 | A kind of voltage transformation switching device and its voltage transformation method for electric tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110744503B (en) * | 2018-07-23 | 2022-03-01 | 南京德朔实业有限公司 | Electric tool, combination of electric tool and battery pack |
| CN111490567A (en) * | 2019-01-28 | 2020-08-04 | 青岛海信移动通信技术股份有限公司 | Mobile terminal and power supply control method thereof |
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| JP2006281405A (en) * | 2005-04-04 | 2006-10-19 | Hitachi Koki Co Ltd | Cordless power tool |
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| JP2000324841A (en) * | 1999-05-07 | 2000-11-24 | Sb Power Tool Co | Power supply |
| CN2914448Y (en) * | 2005-03-07 | 2007-06-20 | 美国凹凸微系有限公司 | Voltage converter circuit and group battery |
| JP2006281405A (en) * | 2005-04-04 | 2006-10-19 | Hitachi Koki Co Ltd | Cordless power tool |
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