CN101758488B - Electric tool and combination of electric tool and battery pack - Google Patents
Electric tool and combination of electric tool and battery pack Download PDFInfo
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- CN101758488B CN101758488B CN2008101945154A CN200810194515A CN101758488B CN 101758488 B CN101758488 B CN 101758488B CN 2008101945154 A CN2008101945154 A CN 2008101945154A CN 200810194515 A CN200810194515 A CN 200810194515A CN 101758488 B CN101758488 B CN 101758488B
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- power brick
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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
- B25F5/02—Construction of casings, bodies or handles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a combination of an electric tool and a battery pack, wherein the battery pack comprises a plurality of batteries, a circuit board and an electronic control assembly; the circuit board is connected with the batteries; the electronic control assembly is arranged on the circuit board; the electric tool also comprises a circuit board and an electronic control assembly; and the electronic control assembly is arranged on the circuit board. The electronic control assemblies in the battery pack and the electric tool can be respectively used for monitoring the states of the battery pack and performing protection control on the battery pack. With the design, the integral design requirements of the battery pack and the electric tool can be greatly simplified, and the design cost is correspondingly reduced.
Description
Technical field
The present invention relates to a kind of electric tool, relate in particular to a kind of electric tool that adopts the power brick power supply.
The invention still further relates to the combination of a kind of electric tool and power brick.
Background technology
In recent years, along with the development of battery material technology, the capacity of battery is significantly promoted, and its range of application also extends to some powerful power category electric devices from some low power electrical type electric devices, like electric tool etc.Like this, adopted the electric tool of high-multiplying-power battery can break away from cable constraint and can be at any time, use everywhere.For increasing operation rate, what these batteries adopted usually is rechargeable battery, like NI-G (Nickel-cadmium, NiCd) battery, ni-mh (Nickel-Metal Hydride, NiMH) battery, lithium ion (Lithium-ion, L-ion) battery etc.
The battery of the above-mentioned type is with wireless type of electric device cooperating the time; Be to be in a discharge condition; During battery discharge, when voltage drops to the minimum operational voltage value (final voltage) that battery should not continue to discharge again, also continue discharge and just may cause the inner pressure of battery rising; The invertibity of positive and negative electrode active material is damaged, thereby can make the capacity of battery produce obviously minimizing.Equally, battery is plugged into when charging on the charger, after reaching full state, if also continue charging, possibly cause situation such as inner pressure of battery rising, battery distortion, leakage to take place, and makes the performance of battery also can significantly reduce and damage.Therefore, when the design of these wireless type electric devices or charging device, that all can consider to adopt hardware or hardware and software combines to come the protection to power brick overcharges or mistake is put.
Overcharging or crossing and put main voltage and the temperature of considering battery of protection the battery of the above-mentioned type.For example, battery is in when discharge, and cell voltage can descend, and battery temperature can rise, and when voltage drops to final voltage or temperature and rises to the discharge temp upper limit, need take the measure of being correlated with, and as breaking off discharge loop, avoids damaging battery.And for example, battery is in when charging, and cell voltage can rise, and battery temperature also can rise, and when voltage rose to the charging voltage upper limit or temperature and rises to the charging temperature upper limit, the measure that need take to be correlated with avoided battery to sustain damage because of overcharging equally.
Some design detects in real time cell voltage and temperature through voltage and detector unit are set in power brick; Then detected data are fed back to wireless type of electric device or charging device through corresponding ports respectively; These electric devices are judged the data that receive subsequently, and overcharge or cross in power brick and take appropriate measures when putting to avoid battery impaired.But, this design,, also need be judged the state of power brick, and contingent abnormal conditions are controlled because they not only need realize the function of self than higher the requirement of wireless type electric device or charging device.In addition; Taking cost into account, a lot of producers begin to consider to adopt the general power brick of unified standard, as being example with the electric tool; The different wireless type electric tool of same producer can adopt general interchangeable power brick; Be several kinds of variety classeses but have the wireless instrument of same battery bag port,, all can adopt same power brick to carry out work like electric drill, electric circular saw, grass-mowing machine etc.So, if adopt the power brick of above-mentioned design, the different types of electric tool inside that cooperates with these power brick so all need be provided with power brick voltage, temperature is judged and the components and parts of control, obviously can increase design and the cost of making greatly.
The power brick design that also has is an integrated processor in power brick; These processors not only can carry out the detection of voltage, temperature etc. to battery; Also can judge whether to overcharge or put excessively, and when overcharging or put excessively, initiatively power brick controlled and avoided battery impaired according to detected data.Yet though this power brick can solve the problem of above-mentioned design, itself designing requirement and design and manufacturing cost are all very high.
Summary of the invention
The present invention provides a kind of electric tool, is provided with Electronic Control Unit in it, can carry out the power brick that is mated to put protection, thereby can simplify the design of respective battery bag, and reduce cost.
The present invention provides the combination of a kind of electric tool and power brick, is provided with Electronic Control Unit in its electric tool, can carry out the power brick that is mated to put protection, thereby can simplify the design of respective battery bag, and reduce cost.
For realizing one of above-mentioned purpose, technical scheme of the present invention is:
A kind of electric tool comprises:
Fuselage extends along longitudinally;
Motor is arranged in the fuselage and has rotary speed;
Output shaft is exported said rotating speed of motor;
Gear reduction is arranged between motor and the output shaft and with certain speed reducing ratio rotating speed of motor is passed to output shaft;
Handle extends downwards from fuselage bottom;
Trigger is arranged in the handle and with motor and electrically connects, and the press degree of said rotating speed of motor and trigger is proportional;
Base extends from the handle bottom;
Circuit board is arranged in the base and electrically connects with trigger;
Electronic Control Unit is arranged on the said circuit board;
Terminal assemblies electrically connects with said circuit board, and it has the protruding outer plurality of conductive terminals of base that is exposed to of extension.
For realizing one of above-mentioned purpose, technical scheme of the present invention can also be:
The combination of a kind of electric tool and power brick comprises:
Power brick, it comprises
Housing,
Some batteries are housed in the said housing,
First circuit board electrically connects with said battery,
First Electronic Control Unit, be arranged on the said first circuit board and
Some first conducting terminals electrically connect with said first circuit board;
Electric tool, it comprises
Casing,
Motor is arranged in the casing, and it has a rotary speed,
Output shaft is exported said rotating speed of motor,
Chuck is connected with the output of output shaft and is used for the clamping working head,
Second circuit board electrically connects with said motor,
Second Electronic Control Unit, be arranged on the said second circuit board and
Some second conducting terminals electrically connect with second circuit board, and power brick and corresponding electrical contact the with said first conducting terminal in electric tool butt joint back.
Compared with prior art; In power brick and electric tool, be equipped with Electronic Control Unit among the present invention; Can be used for monitoring the power brick state respectively and power brick is carried out protection control; With respect to the function that in power brick, realizes monitoring and control separately, this designing requirement is simplified comparatively speaking greatly, and cost also correspondingly reduces simultaneously.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is that power brick is plugged into the circuit block diagram of working behind the electric tool in the specific embodiment of the invention.
Fig. 2 is the circuit block diagram that power brick is plugged into back charging on the charger in the specific embodiment of the invention.
Fig. 3 is the workflow block diagram of power brick in the specific embodiment of the invention.
Fig. 4 is the workflow block diagram that electric tool implemented to put protection in the specific embodiment of the invention to power brick.
Fig. 5 is the workflow block diagram that charger is implemented over-charge protective in the specific embodiment of the invention to power brick.
Fig. 6 is the plan view after electric tool and power brick are pegged graft in the specific embodiment of the invention.
Fig. 7 is the three-dimensional view before electric tool shown in Figure 6 and power brick are pegged graft, and wherein the upper shell of the half of casing of electric tool and power brick is removed to show its internal structure.
Fig. 8 is the three-dimensional exploded view of the partial component of electric tool shown in Fig. 6.
Fig. 9 is the three-dimensional exploded view of power brick shown in Fig. 6.
The specific embodiment
The present invention has been intended to disclose a kind of new power brick and has overcharged and the protected mode of putting excessively; Cooperate through wireless electric device and power brick common and to avoid power brick to cross putting; Or be that example combines the specific embodiment of Fig. 1 to Fig. 5 to describe through charging device and cooperating of power brick avoiding overcharging of power brick, below having lithium ion battery and cordless power tool.Need to prove that said lithium ion battery is that negative material is the general name of the rechargeable battery of elemental lithium here, according to the difference of positive electrode, it can constitute many systems, like " lithium manganese " battery, and " lithium iron " battery etc.
Fig. 1 is the schematic block circuit diagram that power brick 10 is plugged into electric tool 20 back work, and Fig. 2 is the schematic block circuit diagram that power brick 10 is plugged into back charging on the charger 30.Those of ordinary skill in the art is understandable to be; All be provided with printed circuit board (PCB) in power brick 10, electric tool 20, the charger 30; And the Electronic Control Unit of being made up of plurality of electronic elements shown in the figure is arranged on the related circuit plate, and through the circuit on the circuit board these electronic devices and components is electrically connected each other.
As shown in Figure 1, power brick 10 include battery pack 11, power brick control module 12, detector unit (Temperature Sensor, TS) 13, identification resistance (R1) 14 and plurality of conductive terminals.
In this embodiment, battery pack 11 is made up of the lithium-manganese cell 11 of five joint series connection, and wherein the rated voltage of every batteries is 3.8 volts (V).Certainly, in other embodiments, according to the different working conditions demand, the also visual concrete condition of cell types, joint number and set-up mode and difference.Like battery pack 11 can be that 3.2 volts lithium Fe battery is formed by ten joint rated voltages, and this ten batteries divides two to arrange and be set up in parallel, and every row is in series by five batteries.In addition, because the characteristic of battery is different, its corresponding discharge voltage lower limit V1, charging voltage upper limit V2, charging voltage lower limit, discharge temp upper limit T1, charging temperature upper limit T2 can be corresponding different.
Power brick control module 12 electrically connects with each battery of battery pack 11, is used for detecting the voltage of every batteries and the data such as temperature of power brick, and judges the duty of power brick through these data.The logic circuit that this control module 12 can be made up of the components and parts of realizing each corresponding function also can be the microprocessor of the program of being integrated with, instruction.In this embodiment; Power brick control module 12 is a processor; Usually include micro treatment module (MCU), read-only storage (ROM) module, random access memory (RAM) module, digital/analog converter (A/D converter) module, timer (timer) 221 modules, input/output end port (I/O port) module etc. in this processor; Because the function and the operation principle thereof of these modules are all known well by those of ordinary skill in the art, so the applicant no longer gives unnecessary details at this.It should be noted that; In this embodiment; The voltage of every batteries 11 all can be detected by power brick control module 12, compares and only detects a certain batteries, can effectively avoid can't reflecting because of the uniformity difference of battery the situation that overcharges or put excessively of every batteries.In practical implementation; The voltage analog signal of every batteries 11 is through the input port input of power brick control module 12; And convert data signal to by numeral, then carry out corresponding program and judge whether the voltage of every batteries is overcharged or mistake is put by micro treatment module.
In this embodiment, temperature sensor 13 is a thermistor, and it is sticked to the surface of battery, and is connected with power brick control module 12 through electric lead.Through this set, when the temperature of battery changed, the resistance of thermistor is also corresponding to change, and is detected by power brick control module 12, and detected temperature is used to represent the operating temperature of entire cell bag.As preferred embodiment; Thermistor 13 preferably is set at the highest zone of temperature in the battery pack 11; Can guarantee that like this all batteries can not be damaged because of excess temperature; And the zone that thermistor 13 is provided with preferably completely cuts off with outer gas stream, and the temperature value that so can guarantee to detect battery pack 11 is more accurate.
The resistance of identification resistance 14 can be used for representing the characteristic of battery in the power brick 10, the capacity of battery, the rated voltage of battery etc.After power brick 10 is plugged on electric tool 20 or the charger 30; Electric tool 20 or charger 30 can be distinguished the pressure drop that resistance produced of identification resistance 14 correspondences; Thereby identify battery corresponding characteristics, capacity, rated voltage etc. in the power brick; In this embodiment, the resistance of this identification resistance 14 is used for characterizing corresponding rated voltage.Back extended meeting combined charge device is done detailed explanation.
In this embodiment; The conducting terminal of power brick 10 comprises first positive terminal (B+) 15 and first negative terminal (B-) 19 with the corresponding electric connection of positive and negative electrode of battery pack 11; First power supply terminal (Vcc) 16 that is connected with the respective input mouth of power brick control module 12; Be connected first state indication terminal (BH) 17 that is used for exporting expression power brick duty index signal with the corresponding output end mouth of power brick control module 12, and first recognition terminal (BS) 18 that electrically connects with identification resistance 14.
With reference to shown in Figure 1; Electric tool 20 comprise motor 21, motor control unit 22, be used to detect the temperature sensor of motor 21 temperature (Temperature Sensor, TS) 23, dc source modular converter (DC-DC) 24, plurality of conductive terminals and be used to detect the current sensor 28 of motor 21 electric currents.
Wherein, The conducting terminal of electric tool 20 comprises second positive terminal (B+) 25 and second negative terminals (B-) 29 that can electrically contact with the first positive and negative electrode terminal 15,19 of power brick; The second source terminals (Vcc) 26 that electrically contacts with first power supply terminal 16 of power brick 10, and indicate terminals (BH) 27 with second states that first state indication terminal 17 of power brick electrically contacts.Need to prove; Not having respective terminal in the conducting terminal of above-mentioned electric tool electrically contacts with first recognition terminal 18 of power brick; This is that electric tool 20 is inserted the power brick of discerning corresponding rated voltage through mechanical anti-misoperation, that is to say because in this embodiment; The interface of electric tool 20 and power brick 10 is provided with the anti-mis-insertion structure that can cooperatively interact; Like the fit structure of protruding key and keyway, so, the unmatched power brick of rated voltage and electric tool just can't be plugged on the electric tool smoothly.Certainly; In other embodiments; Also can realize the electronic recognition rated voltage in the electric tool, only compare mechanical anti-misoperation and insert form that cost can the corresponding raising because of the increase of element through electronic devices and components such as corresponding recognition terminal, comparator, amplifier are set.Because these anti-mis-insertion designs can be expected for a person skilled in the art easily, so the applicant no longer does further description at this.
In this embodiment, motor control unit 22 is to be made up of logic circuit, and it is connected with second state indication terminal 27.Power brick duty index signal is by the corresponding output end mouth of power brick control module 12 (indicating) output, and the transmission through first and second state indication terminal 17,27 is that motor control unit receives successively.Detector unit 23 is a thermistor, and it sticks to motor 21 surfaces and comes the detection-sensitive motor temperature, and is connected with motor control unit 22 with the electrical signal transfer that will represent temperature and gives control module.
In this embodiment, dc source modular converter 24 is to be used for serving as a dc constant voltage power supply, is used to supply with the electric power such as control module 12, detector unit 13 of power brick.This dc source modular converter 24 is arranged between the positive and negative electrode terminal, thereby after power brick 10 and electric tool 20 are pegged graft, can form electrical loop with battery pack 11, and, can form electrical loop with power brick control module 12.In above-mentioned loop; Also be provided with a trigger 202 in the electric tool 20; After trigger 202 closures, in the electrical loop of forming with battery pack 11, dc source modular converter 24 converts the rated voltage of battery pack 11 to can mate with 12 work of power brick control module a lower voltage; And in the electrical loop of forming with power brick control module 12, this dc source modular converter 24 serves as a dc constant voltage power supply and comes for power brick control module 12 electric power to be provided.Simultaneously, this dc source modular converter 24 also is connected to come for it with motor control unit 22 provides electric power.Should be in this embodiment; Though be that electronic devices and components in the power brick provide electric power still by battery pack; But need be plugged into electric tool and start working (trigger 202 closes) after, that is to say that power brick is under storage (peg graft) or standby (trigger 202 is not closed) state; Electronic devices and components in it are not worked, thereby effectively avoid the electric power in the power brick unnecessarily to consume.
Current of electric detecting element 28 setting of connecting with motor 21 also is provided with a motor control switch 201 therebetween, is used for controlling the operation of motor.Current measuring element 28 can adopt mode well-known to those skilled in the art, as be used to obtain the detection resistance of current value, comparator that the current value that obtains and predetermined current threshold are compared etc., the applicant no longer does detailed description.Equally; Motor control switch 201 also can adopt semiconductor switch well-known to those skilled in the art; As adopt MOSFET (Metallic OxideSemiconductor Field Effecttransistor; The mos field effect transistor metal-oxide semiconductor (MOS)), can come the operation of control motor effectively through the characteristic of MOSFET high frequency break-make like this.In addition, motor control switch 201 also can adopt the conventional means of relay switch.
With reference to shown in Figure 2, wherein power brick 10 parts among power brick 10 parts and Fig. 1 are identical, and the applicant repeats no more.Charger 30 comprises charging control unit 31, is used to serve as the dc source modular converter (DC-DC) 32 of dc constant voltage power Vcc, power of alterating and direct current modular converter (AC-DC) 33, plurality of conductive terminals, the charge switch 301 that is used to detect the current measuring element 302 of charge circuit electric current and is used to control charge circuit conducting and disconnection.
The conducting terminal major part of charger 30 is similar with electric tool 20; Comprise the 3rd positive terminal (B+) 35 and the 3rd negative terminals (B-) 39 that can electrically contact with the first positive and negative electrode terminal 15,19 of power brick 10; The 3rd power supply terminals (Vcc) 36 that electrically contacts with first power supply terminal 16 of power brick 10, and indicate terminals (BH) 37 with the third state that first state indication terminal 17 of power brick electrically contacts.But; Different with electric tool 20 is; Charger 30 also comprises the 3rd recognition terminal 38 that electrically contacts with first recognition terminal 18 of power brick 10, and, between the 3rd recognition terminal 38 and dc constant voltage power Vcc, also be in series with the second identification resistance (R2) 34; Through this layout, between dc constant voltage power Vcc and ground (B-terminal), form the bleeder circuit that is provided with by the first identification resistance (R1) 14 and 24 series connection of the second identification resistance (R2).For charger 30; The resistance of the magnitude of voltage of dc constant voltage power Vcc and the second identification resistance 34 is known; So; As long as through detecting the magnitude of voltage Vbs of BS port, charging control unit 31 just can learn that first discerns the resistance of resistance 14, thus can according to the corresponding relation of resistance of storing in it and voltage know the rated voltage of power brick 10 to be charged.For power brick 10, whether power brick control module 12 produces pressure drop through detection BS port just can be judged it is charged state or discharge condition at present.With reference to shown in Figure 1, when power brick 10 was docked with electric tool 20, the BS port was empty, promptly detects Vbs=0, just showed that this moment, power brick was a discharge condition.Refer again to shown in 1, when power brick 10 was docked with charger 30, the BS port had pressure drop to produce, and promptly detects Vbs ≠ 0, just showed that this moment, power brick was a charged state.Through a pull-up resistor R2 is set in power brick, just can lets power brick judge charged state or discharge condition, and extra electronic devices and components need be set in power brick, thereby greatly reduce the cost of manufacturing.Certainly, for what those of ordinary skills can expect easily be, the BS port in electric tool is provided with pull-up resistor R2, and cancellation is provided with in power brick, can let power brick realize the judgement of charge and discharge equally.
In this embodiment; Charging control unit 31 is for being integrated with the processor of program, instruction; Similar with power brick control module 12, this processor includes functional modules such as timer 311, micro treatment module, ROM module, ram module, digital/analog converter module equally.Charging control unit 31 is indicated terminal 37 to be connected with the third state and is obtained the signal that state is made in the pilot cell job contract; Be connected the voltage signal that obtains the BS port with the 3rd recognition terminal 38, and be connected the bleeder circuit of forming by two resistance 303 between the positive and negative electrode terminal and be connected the voltage that detects power brick.
Also be provided with power of alterating and direct current modular converter (AC-DC) 33 in the charger 30, being used for the alternating current that flows into through plug is converted to can be to the DC current of power brick charging.Power of alterating and direct current modular converter 33 is formed electrical loop with dc source modular converter 32; And dc source modular converter 32 is formed electrical loop with power brick control module 12; Thereby dc source modular converter 32 can convert the DC current of power of alterating and direct current modular converter 33 output to a DC current that voltage is lower, and dc source modular converter 33 can serve as a dc constant voltage power Vcc and comes electric power to the electronic devices such as control module 12 in the power brick 10 to be provided.Simultaneously, this dc source modular converter 32 also is connected to come for it with charging control unit 31 provides electric power.As previously mentioned, through this set, power brick is under storage (not pegging graft) or standby (trigger 202 is not closed) state, and the electronic devices and components in it are not worked, thereby effectively avoid the electric power in the power brick unnecessarily to consume.Similar with electric tool 20, the current measuring element 302 that is arranged in the charge circuit can be detection resistance well-known to those skilled in the art, comparator, amplifier etc.; Charge switch 301 also can adopt MOSFET well-known to those skilled in the art or relay switch.
Below in conjunction with Fig. 3 to Fig. 5 to power brick in discharge and when charging, the cooperation through electric tool realized putting protection and through realizing over-charge protective with cooperating of charger.
Shown in Figure 3 is the workflow block diagram of power brick 10.
When power brick 10 be plugged on the electric tool 20 and closed trigger 202 after, or power brick 10 is plugged on the charger 30 and charger with after AC power is connected, power brick control module 12 start working (step 401).Subsequently, power brick control module 12 detects and obtains the magnitude of voltage Vc (step 402) of every batteries in the battery pack 10.Power brick control module 12 obtains the magnitude of voltage Vbs (step 403) that this port (i.e. first recognition terminal 18) is located through the BS port, and judges whether this magnitude of voltage Vbs is zero (step 404).In this embodiment; Because above-mentioned two steps are in order to know that the current battery bag is charged state or discharge condition, promptly power brick 10 is plugged on the charger 30 or is plugged on the electric tool 20, so power brick control module 12 need not obtain concrete Vbs value; Its needs know whether voltage is arranged on the BS port; As obtain a high level signal and just show on this port that voltage is arranged, and opposite, just show on this port there is not voltage when obtaining a low level signal.Certainly, what those skilled in the art can expect easily is, 12 signals of telecommunication that need to obtain a high and low level of power brick control module can be voltage signals so it obtains, also can be like other forms of signals of telecommunication such as electric currents.
As previously mentioned, when Vbs=0, show that power brick is in discharge condition, next power brick control module 12 will judge further whether the voltage Vc of battery and power brick temperature T b all are in the normal range (NR) under the discharge condition.At first, can judge that whether cell voltage Vc is smaller or equal to discharge voltage lower limit V1 (step 405).Because the uniformity of each battery possibly not be fine in the battery pack 11; So each cell voltage Vc possibly not be identical, therefore in this embodiment, for guaranteeing reliability; Get wherein minimum magnitude of voltage and compare, can guarantee that so all batteries can not produce the situation of putting.In this embodiment, be the battery of lithium manganese characteristic owing to what adopt, so discharge voltage lower limit V1 gets 2.5 volts (V).When judging V1≤2.5V, show that power brick had reached the state of putting, at this moment, set BH port is a low level signal (step 411), the duty of expression current battery bag is in unusually; When judging V1>during 2.5V, show that power brick is also crossed to put, whether then further judge power brick temperature T b more than or equal to discharge temp upper limit T1 (step 406), in this embodiment T1 be 75 degrees centigrade (℃).When judging Tb>=T1, show that temperature is too high, be not suitable for having discharged again, this moment, power brick control module 12 execution in step 411 represented that power brick has been in the abnormal work state; When judging that Tb is<during T1; Show that the power brick temperature also is in the normal range (NR), owing to judged that cell voltage also is in the normal range (NR) before, so; Set BH port is a high level signal (step 407); The duty of expression current battery bag is in normally, then, returns the cycle criterion that step 405 is carried out cell voltage and power brick temperature (step 406).Need to prove that above-mentioned two determining steps 405,406 can exchange, and can't have influence on implementation effect.In addition, also can represent that the power brick duty is unusual with high level signal, low level signal representes that the power brick duty is normal.
When Vbs ≠ 0, show that power brick is in charged state, power brick control module 12 at first set BH port is a high level signal (step 408), judges then whether the voltage Vc of battery and power brick temperature T b all are in the normal range (NR) under the charged state.At first, can judge that whether cell voltage Vc is more than or equal to charging voltage upper limit V2 (step 409).In this embodiment, consider the problem of battery consistency, get wherein maximum magnitude of voltage and compare, can guarantee that so all batteries can not produce the situation that overcharges; In addition, charging voltage upper limit V2 gets 4.2V.When judging Vc>=4.2V, show that power brick has reached the state that overcharges, at this moment, and power brick control module 12 execution in step 411, the duty of expression current battery bag is in unusually; When judging that<during 4.2V, show that power brick does not also overcharge, whether then further judge power brick temperature T b more than or equal to charging temperature upper limit T2 (step 410), T2 is 45 ℃ to Vc in this embodiment.When judging Tb>=T2, show that temperature is too high, be not suitable for having charged again, this moment, power brick control module 12 execution in step 411 represented that power brick has been in the abnormal work state; When judging that Tb<during T2, shows that the power brick temperature also is in the normal range (NR), owing to judged that cell voltage also is in the normal range (NR), at this moment, returns the cycle criterion that step 409 is done cell voltage and power brick temperature (step 410) before.Need to prove that above-mentioned two determining steps 409,410 can exchange, and can't have influence on implementation effect.
Shown in Figure 4 is that 20 pairs of power brick 10 of electric tool implemented to put the workflow block diagram of protecting and self being protected.
Cooperate with reference to shown in Figure 1; After power brick 10 is plugged into electric tool 20 corresponding ports and the trigger 202 that closes; Dc constant voltage power supply 24 is started working; Give power brick control module 12 and motor control unit 22 through second, first power supply terminal 26,16 with current delivery successively, thereby, motor control unit 22 start working (step 501).Motor control unit 22 detects the signal (step 502) of BH port subsequently, promptly receives the index signal of expression power brick duty through second state indication terminal 27, and judges that further this signal is high level signal or low level signal (step 503).If judge it is low level signal, just come back to step 502.Before address, low level signal shows that the duty of power brick is unusual, might be battery through putting, also might be that the power brick temperature is too high.If be unusually since battery through putting, then motor control unit 22 just constantly carries out cycle detection, but starter motor gauge tap 201 not; If be that in the time of in being reduced to normal range (NR), the set of BH port signal is high level signal because the power brick temperature is too high, and then in the process of above-mentioned cycle detection, the power brick temperature can progressively reduce unusually.When judging that the BH port signal is high level signal; Motor control unit 22 just further detects motor temperature Tm (step 504); And whether the operating temperature of judging motor 21 is too high, and in this embodiment, the machine operation temperature upper limit is 110 ℃ (step 505).When judging Tm>110 ℃ times, show that the machine operation temperature is too high, at this moment; Motor control unit 22 can further judge whether motor control switch 201 has opened (step 506); If, then directly arrive step 518, promptly open motor control switch 201 and break off discharge loop; If not, then get back to step 502, promptly detect the signal of BH port again, and repeat above-mentioned steps, its objective is and wait for that motor 21 operating temperatures progressively are cooled in the normal range (NR).When judging Tm≤110 ℃, show that the machine operation temperature is in normal range (NR), then closed motor control switch 201 is connected discharge loop, thereby, motor 21 beginning operate as normal.
In motor 21 courses of work, tend to take place some abnormal conditions and cause motor rotation blockage, in this moment; Electric current I m through motor 21 can increase suddenly, if this big current duration is long, may burn out motor; So, for avoiding the generation of this situation, in machine operation; Motor control unit 22 also can constantly detect the electric current I m (step 508) through motor; And judge it whether greater than the upper limit of motor working current, in this embodiment, this upper current limit is 50 amperes (A) (steps 509).If motor working current is in normal range (NR), promptly < 50A, then whether normal whether the motor control unit 22 duty operating temperature and motor that also can constantly detect power brick be in normal range (NR) to Im.Motor control unit 22 obtains the signal (step 510) of BH port, and judges it is high level signal or low level signal (step 511).If judge it is high level signal, then get back to step 504, proceed the detection of motor temperature; If judge it is low level signal, then directly arrive step 518, promptly open motor control switch 201 and break off discharge loop.
When judging Im >=50A; Show that current of electric is excessive; As stall possibly take place, its interior timer 221 time-delay characteristics of motor control unit 22 settings this moment are fixed time, like 50～100 milliseconds (ms) (steps 512); And in this process, detect the operating current Im (step 514) of motor 21, and continuous Im >=50A (step 515) more whether.Return to normal range (NR) if detect motor working current Im, promptly < 50A then with reset zero clearing (step 516) and get back to the detection that step 510 is proceeded power brick duty and motor temperature of timer, and judges whether it is normal to Im.If current of electric Im >=50A all the time in above-mentioned special time, then when the timer time-delay arrives (step 513), motor control unit 22 at first with the timer zero clearing (step 517) that resets, is opened motor control switch 201 then and is broken off discharge loop.
Shown in Figure 5 is the workflow block diagram that 30 pairs of power brick of charger 10 are implemented over-charge protective and self is protected.
Cooperate with reference to shown in Figure 2; After power brick 10 is plugged on the charger 30; And after Charger (portable round) insertion external receptacle is connected with AC power; Dc constant voltage power supply 32 begins to power brick control module 12 and charging control unit 31 provide electric power, charging control unit 31 start working (step 601).Charging control unit 31 detects the voltage signal (step 602) of BS port; Promptly receive the concrete voltage value signal of BS port through the 3rd recognition terminal 38; And learn the rated voltage of power brick, thereby select and set the power brick charging voltage upper limit V0 (step 603) corresponding with the relation of charging voltage with this power brick according to the battery rated voltages of storage in the charging control unit 31 according to this signal.Power brick charging voltage upper limit V0 is exactly the accumulation of each battery charging voltage upper limit V1, in this embodiment, because battery pack totally five batteries, so V0=4.2*5=21 volt V.Subsequently, charging control unit 31 is obtained the signal (step 604) of BH port through third state indication terminal 37, and judges that this signal is high level signal or low level signal (step 605).If what receive is low level signal, the duty of expression power brick is unusual, might be that battery is saturated and do not need to have filled again, also might be that the power brick temperature is too high and exceeded normal charging temperature scope.Next, charging control unit 31 can judge it is concrete which kind of situation.
Charging control unit 31 detects the voltage Vb (step 619) of power brick, and judges that whether Vb is smaller or equal to power brick charging voltage lower limit V3 (step 620).In this embodiment, be limited to 3.6V under the charging voltage of battery, owing to have five batteries, so be limited to V3=3.6*5=18V under the charging voltage of power brick.When Vb≤18V, show that power brick is because temperature is too high unusually, rather than battery is saturated.At this moment, charging control unit 31 can be got back to step 604, detects the BH port signal again and carries out follow-up step, in this process, waits for that the power brick temperature retrieval is to normal scope.As Vb>during 18V, show that power brick has comprised the saturated situation of battery in unusual at least, at this moment, charger can show makes mistakes, as through forms (step 620) such as flicker of LED lamp or audible alarms.Return step 605, if charging control unit 31 receives is high level signal, show that the power brick duty is normal, then closed charging control switch 301 is connected charge circuit (step 606), simultaneously, opens charging timer 311 (step 607).Timer 311 is the maximum time length that a charging is set to charger 30; After this time span arrives; Charging control unit 31 can initiatively be broken off charge circuit, thereby can effectively avoid can't charging effectively because of the circular wait overlong time in the charging process.This maximum time length can look different battery behavior and be set at one hour, one and a half hours or two hours etc.Charger 30 begins to be power brick 10 chargings.
At first, charger carries out constant-current charge earlier, and both electric current was constant in this process, and power brick voltage progressively rises; When power brick voltage reaches charging voltage upper limit V0, carry out constant-voltage charge again, voltage remains unchanged in this process, and current step reduces.
Charging control unit 31 detects the voltage Vb (step 608) of power brick, and judges whether Vb equals charging voltage upper limit V0 (step 609).If Vb ≠ V0; Show still and carrying out constant-current charge; Charging control unit can judge whether the time span that timer 311 is set has arrived (step 609), if arrive, and then timer 311 zero clearings (step 618); And through the demonstration (step 613) that makes mistakes represent the charging do not accomplish because of abnormal conditions, break off charge circuit (step 614) subsequently.If the time span of setting does not also arrive; Then charging control unit 31 can continue to obtain the signal (step 616) of BH port; And judge it is high level signal or low level signal (step 617); If low level signal shows that the power brick duty is unusual, demonstration (step 613) and break off charge circuit (step 614) at this moment can make mistakes; If high level signal shows that the power brick duty is normal, charging control unit 31 is got back to step 608 subsequently, repeats the detection of power brick voltage, and judges whether to be in the constant-current charge state.
If Vb=V0 shows that power brick voltage has reached the charging voltage upper limit, but do not show that power brick charged saturatedly, might also be in the state of constant-voltage charge.Charging control unit 31 detects through the electric current I c (step 610) in the charge circuit, and whether judges Ic smaller or equal to the charging current upper limit (step 612), and in this embodiment, this higher limit is 20 milliamperes (mA).In this process, charging control unit 31 can judge also whether the time span that timer 311 is set has arrived (step 611), if arrive, and then timer 311 zero clearings (step 618), and show and make mistakes (step 613), break off charge circuit (step 614) subsequently.When judging Ic>during 20mA, show also unsaturation of battery, at this moment can repeating step 610 steps 612, i.e. duplicate detection electric current I c and judge that whether it is smaller or equal to the charging current upper limit; When judging Ic≤20mA, show that battery has been charged to saturation state, charging control unit 31 turn off charge switch 301 subsequently, thus also make whole charge circuit break off.
Among the present invention; Power brick can be carried out normal or unusual judgement to self working state; And will represent normal or anomalous signals passes to wireless electric device or charging device through a port, wireless electric device or charging device are carried out control corresponding according to this signal.As far as wireless electric device, this control can comprise the connection discharge loop, abandons connecting discharge loop, wait for and connect discharge loop, disconnection discharge loop etc.; For charging device, this control can comprise the connection charge circuit, waits for the connection charge circuit, abandons connecting charge circuit, break off charge circuit etc.Through this set, both can effectively protect instrument itself, motor be can effectively protect again, and power brick and wireless electric device or whole design and the manufacturing cost of charging device reduced.In addition; The dc constant voltage power supply is set in wireless electric device or charging device; Can dock with power brick afterwards to the electronic devices and components in the power brick provide electric power at it, that is to say, power brick is under storage (pegging graft) or standby (trigger 202 is not closed) state; Electronic devices and components in it are not worked, thereby effectively avoid the electric power in the power brick unnecessarily to consume.Certainly, be can the dc constant voltage power supply be arranged in the power brick being connected with the power brick control module, and partly form electrical loop with the related circuit in wireless electric device or the charging device for what those of ordinary skills can expect easily.Through this set, make power brick with before wireless electric device or charging device dock, this electrical loop is broken off, so this moment, power brick basically can consumes electric power.In addition, through an identification resistance is set in wireless electric device or charging device, just can let power brick judge charged state or discharge condition, and extra electronic devices and components need be set in power brick, thereby greatly reduce the cost of manufacturing.
Fig. 6 has disclosed the concrete structure implementation of electric tool and power brick among the present invention to Fig. 9.Like Fig. 7 and shown in Figure 8; Electric tool 20 comprises a casing 71, this casing have the fuselage part 711 of extending along longitudinally (shown in the A axle among Fig. 6), from the downward extended handle portion 712 of fuselage part and from the handle portion end extended base portion 713.Wherein base portion 713 is substantially perpendicular to handle portion 712 settings.Need to prove; Here and back " perpendicular " mentioned in the literary composition be meant the extension axis B of handle portion 712 and the extension axis C perpendicular setting of base portion 713; Comprise that two axial lines is vertical utterly; The angle that also comprises two axial lines is a bigger or smaller angle than the right angle, like 20 degree with interior any angle.In addition, in this embodiment, casing 71 is to form two half of housings through injection moulding; Then two half of housings are put together; That is to say that fuselage part, handle portion are that one links to each other with base portion, certainly, in other embodiments; These parts can form separately, and are fixed together through the connected mode of knowing (like modes such as buckle, screw connections).
In fuselage part 711, be provided with motor 72.In the front portion of motor 72, along being disposed with gear reduction 73, output shaft 74 and chuck 75 on the longitudinally.Well known to those of ordinary skill in the art is that gear reduction 73 is to be used for the rotary speed of motor 72 is passed to output shaft 74 through certain speed reducing ratio.In this embodiment, this gear reduction is a planet gear reduction, and the user can regulate speed reducing ratio through stirring toggle 731.As when the user pushes gear " 1 " with toggle 731, gear reduction 72 is in the high speed reducing ratio state of low speed; And when toggle 731 was pushed gear " 2 ", gear reduction 72 was at a high speed low speed reducing ratio state.Chuck 75 is installed in the front end of output shaft 74, is used for clamping working head (not shown) and carries out corresponding operation, carries out the operation of boring like clamping drilling bit, or the clamping screw drapes over one's shoulders head and carries out an operation of twisting screw.
Second circuit board 76 is arranged in the base 713, and its bearing of trend (shown in the C axle among Fig. 6) with base 713 is substantially parallel, and with bearing of trend (shown in the B axle among Fig. 6) approximate vertical of handle 712.Electronic Control Units such as the motor control unit of mentioning in the above-mentioned embodiment 22, current of electric detecting element 28, dc source modular converter 24 and motor control switch 201 all are arranged on the upper surface of second circuit board 76, and electrically connect each other through the circuit on the circuit board.In this embodiment, motor control switch 201 is mos field effect transistor (MOSFET).Second terminal assemblies 77 is arranged on the lower surface of second circuit board 76; It comprises a terminal body 771 and is arranged on some second conducting terminals in the terminal body 771 that promptly second positive terminal (B+) 25, second negative terminal (B-) 29, second source terminal (Vcc) 26 and second state are indicated terminal (BH) 27.One end of these conducting terminals snaps in the respective card slot (not indicating) on the second circuit board 76, and the other end then extends and protruding being exposed to outside the base 713 along the direction that is parallel to second circuit board 76.Identical with above-mentioned embodiment is, totally 4 of second conducting terminals, and the draw-in groove number on the second circuit board 76 is 5, promptly leaves a blank with first recognition terminal, the 18 corresponding draw-in grooves of power brick 10, is used for supplying power brick 10 identification charged state or discharge conditions.Terminal body 771 is being provided with a guide channel 772 along the horizontal expansion that is basically perpendicular to handle 712, and protrudes out stair-stepping protuberance 773 respectively in the transverse ends of terminal body 771.On base 713 sidewalls, laterally extend a bearing plate 7131, be formed with guidance part 7132, and depression is provided with identical stair-stepping depressed area 7133 on the base side wall at vertical ora terminalis of plate.In the assembling process; When terminal assemblies 77 plugs 76 last times of second circuit board, through cooperating of guidance part 7132 and guide channel 772, terminal assemblies 77 installs in the half of casing 71 along transverse set with second circuit board 76; In the corresponding chimeric depressed area of going on base 713 sidewalls 7133 of protuberance 773 on the terminal assemblies 77; Bearing plate 7131 supports second circuit board 76 on it, through this structure, makes terminal assemblies 77 and second circuit board 76 be positioned in the casing.After other half of casing assembling is gone up, under the clamping of two half of casings, terminal assemblies 77 and second circuit board 76 by secure fixation in casing 71.What those of ordinary skills can expect easily is, guidance part and guide channel, and the mutual alignment of depressed area and protuberance is interchangeable.
Be furnished with Electronic Control Units such as power brick control module 12, identification resistance 14 on the first circuit board 105; First conducting terminal is arranged on vertical ora terminalis place of first circuit board 105 upper surfaces; Promptly first positive terminal (B+) 15, first negative terminal (B-) 19, first power supply terminal (Vcc) 16, first state are indicated terminal (BH) 17, and first recognition terminal (BS) 18.First circuit board 105 is positioned at the top of battery pack 11 and near the end face of upper shell 101, it reliably is positioned in the housing through reference column 113.Electrode connecting piece that battery pack 11 is drawn 113 is inserted on the first circuit boards in the corresponding jack 1051, thus with the respective electronic Control Component and conducting terminal electric connection that are arranged on the first circuit board 105.First conducting terminal aligns with corresponding terminal hole 1032 respectively, electrically contacts with corresponding second conducting terminal to insert electric tool 20 bases 713 backs in power brick 10.One fastens button 104 is arranged on the power brick 10, and it has button portion 1042 and buckling parts 1041, and wherein the effect of buckling parts 1041 through spring 114 can realize the fastening with electric tool 20 automatically.In addition, press the button portion 1042 and just can realize that buckling parts 1041 and electric tool 20 break away from fastening.
Like Fig. 6 and shown in Figure 7, power brick 10 is inserted in the base 713 along the direction D that is parallel to electric tool 20 bases extension axis, and corresponding electrical contact the with second conducting terminal of first conducting terminal fastens button 104 bales catch and be incorporated in the base 713 of electric tool.After the user pressed trigger 202, first circuit board 105 just can be carried out relevant operation by the flow process shown in Fig. 3-5 with the Electronic Control Unit on the second circuit board 76.In this embodiment, second circuit board and terminal assemblies are set directly in the base, only need to electrically connect through lead and potentiometer, and do not need other connection lead, thereby make things convenient for arranging of each parts in the casing, make things convenient for simultaneously and the docking of power brick.Certainly, what can expect easily is, also can second circuit board vertically is arranged in the handle and near the position of base, through such setting, can realize making things convenient for the effect of each component arrangement in the casing equally.Similarly, first circuit board and terminal assemblies are arranged in the headroom of power brick housing, make things convenient for arranging of each parts in the power brick, the docking of convenient simultaneously and electric tool.
Claims (18)
1. the combination of electric tool and power brick is characterized in that, comprising:
Power brick, it comprises
Housing,
Some batteries are housed in the said housing,
First circuit board electrically connects with said battery,
First Electronic Control Unit, be arranged on the said first circuit board and
Some first conducting terminals electrically connect with said first circuit board;
Electric tool, it comprises
Casing,
Motor is arranged in the casing, and it has a rotary speed,
Output shaft is exported said rotating speed of motor,
Chuck is connected with the output of output shaft and is used for the clamping working head,
Second circuit board electrically connects with said motor,
Second Electronic Control Unit, be arranged on the said second circuit board and
Some second conducting terminals; Electrically connect with second circuit board; And power brick and corresponding electrical contact the in electric tool butt joint back with said first conducting terminal; Said first conducting terminal is arranged on vertical ora terminalis place of said first circuit board, and said second conducting terminal is plugged on the second circuit board, and said first circuit board is provided with near the top of power brick housing; Said second circuit board is provided with near the bottom of electric tool casing, and said first circuit board and said second circuit board are basically parallel to the grafting direction of power brick and electric tool.
2. the combination of electric tool according to claim 1 and power brick is characterized in that: said some batteries comprise lithium ion battery.
3. the combination of electric tool according to claim 1 and power brick is characterized in that: said first Electronic Control Unit is used for
Detect the voltage and the temperature of said battery,
Judge the duty of power brick according to detected voltage and temperature, and
Generation is used for representing the condition indicative signal of power brick duty.
4. the combination of electric tool according to claim 3 and power brick is characterized in that: said second Electronic Control Unit is used for
Obtain said condition indicative signal, and
Control the operation of motor according to the condition indicative signal that obtains.
5. the combination of electric tool according to claim 4 and power brick is characterized in that: said first and second conducting terminals comprise each other the electrically terminal that is used for transmitting said condition indicative signal of contact.
6. the combination of electric tool according to claim 1 and power brick is characterized in that: said casing comprises the fuselage part, extends and the base part vertical basically with respect to handle portion by the downward extended handle portion in fuselage part bottom and by the handle portion bottom.
7. the combination of electric tool according to claim 6 and power brick is characterized in that: said second circuit board is located in the said base part.
8. the combination of electric tool according to claim 6 and power brick is characterized in that: said second circuit board is located in the said handle portion and near said base part setting.
9. the combination of electric tool according to claim 1 and power brick is characterized in that: said first Electronic Control Unit comprises microprocessor.
10. the combination of electric tool according to claim 1 and power brick is characterized in that: said second Electronic Control Unit comprises mos field effect transistor (MOSFET).
11. the combination of electric tool according to claim 1 and power brick is characterized in that: said electric tool also comprises trigger, is arranged in the handle and with motor to electrically connect, and the press degree of said rotating speed of motor and trigger is proportional.
12. an electric tool is characterized in that, comprising:
Fuselage extends along longitudinally;
Motor is arranged in the fuselage and has rotary speed;
Output shaft is exported said rotating speed of motor;
Gear reduction is arranged between motor and the output shaft and with certain speed reducing ratio rotating speed of motor is passed to output shaft;
Handle extends downwards from fuselage bottom;
Trigger is arranged in the handle and with motor and electrically connects, and the press degree of said rotating speed of motor and trigger is proportional;
Base extends from the handle bottom;
Circuit board is arranged in the base and electrically connects with trigger;
Electronic Control Unit is arranged on the said circuit board;
Terminal assemblies electrically connects with said circuit board, and it has the protruding outer plurality of conductive terminals of base that is exposed to of extension, and said terminal assemblies is plugged on the circuit board, and said circuit board is basically perpendicular to handle and extends setting.
13. electric tool according to claim 12 is characterized in that: provide in the said base and be basically perpendicular to the bearing plate that handle is provided with, to be used to accept said circuit board.
14. electric tool according to claim 12 is characterized in that: provide guide member on one of said base and terminal assemblies, be formed with the guide channel that cooperates with said guide member on another of said base and terminal assemblies.
15. electric tool according to claim 14 is characterized in that: said guide channel is basically perpendicular to the handle setting.
16. electric tool according to claim 12 is characterized in that: be formed with depressed area on one of said base and terminal assemblies, be formed with on another of said base and terminal assemblies and the identical protuberance of said depressed area configuration with specified configuration.
17. electric tool according to claim 16 is characterized in that: said specified configuration is a stairstepping.
18. electric tool according to claim 12 is characterized in that: said Electronic Control Unit comprises mos field effect transistor (MOSFET).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101945154A CN101758488B (en) | 2008-10-30 | 2008-10-30 | Electric tool and combination of electric tool and battery pack |
Applications Claiming Priority (1)
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| CN2008101945154A CN101758488B (en) | 2008-10-30 | 2008-10-30 | Electric tool and combination of electric tool and battery pack |
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| CN101758488A CN101758488A (en) | 2010-06-30 |
| CN101758488B true CN101758488B (en) | 2012-07-04 |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684235B (en) * | 2011-03-08 | 2015-06-10 | 南京德朔实业有限公司 | Direct current system |
| CN102684233B (en) * | 2011-03-08 | 2015-02-25 | 南京德朔实业有限公司 | Direct current system |
| CN102683759B (en) * | 2011-03-08 | 2015-02-25 | 南京德朔实业有限公司 | Direct current system |
| CN104752653A (en) * | 2013-12-31 | 2015-07-01 | 南京德朔实业有限公司 | Electric tool and battery pack thereof |
| EP3378113B1 (en) | 2016-02-26 | 2022-11-30 | Techtronic Outdoor Products Technology Limited | Battery packs and method of assembling battery packs |
| DE102016003150A1 (en) * | 2016-03-16 | 2017-09-21 | Andreas Stihl Ag & Co. Kg | Hand-operated implement with an electric motor |
| CN110460269B (en) | 2018-05-03 | 2021-08-27 | 南京德朔实业有限公司 | Electric tool |
| CN109192895A (en) * | 2018-09-11 | 2019-01-11 | 苏州宝时得电动工具有限公司 | Battery pack and power tool component |
| CN110190655B (en) * | 2019-06-28 | 2024-05-10 | 斯泰宝机电科技(昆山)有限公司 | Electric tool control device, electric tool and control method |
| CN114097148B (en) * | 2019-08-09 | 2024-02-23 | 创科无线普通合伙 | Terminal and method |
| CN210837856U (en) * | 2019-10-29 | 2020-06-23 | 苏州宝时得电动工具有限公司 | Battery pack and electric tool system |
| EP4046754B1 (en) * | 2019-12-30 | 2024-03-27 | Nanjing Chervon Industry Co., Ltd. | Electric tool and electric control assembly thereof |
| CN111903423A (en) * | 2020-09-10 | 2020-11-10 | 宁波欣仪伟业进出口有限公司 | Electric strapping machine and rechargeable battery pack |
| CA3156090A1 (en) * | 2020-09-30 | 2022-04-07 | Nanjing Chervon Industry Co., Ltd. | Battery pack, power tool system, and charging system |
| DE102022206700A1 (en) * | 2022-06-30 | 2024-01-04 | Robert Bosch Gesellschaft mit beschränkter Haftung | Machine tool device, machine tool and machine tool system |
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Denomination of invention: Electric tool and combination of electric tool and battery pack Effective date of registration: 20140515 Granted publication date: 20120704 Pledgee: Bank of Communications Ltd Suzhou branch Pledgor: Baoshide Electric Tools Co., Ltd., Suzhou Registration number: 2014990000362 |
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