CN207612105U - A kind of electric tool class protection board - Google Patents
A kind of electric tool class protection board Download PDFInfo
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- CN207612105U CN207612105U CN201721925826.4U CN201721925826U CN207612105U CN 207612105 U CN207612105 U CN 207612105U CN 201721925826 U CN201721925826 U CN 201721925826U CN 207612105 U CN207612105 U CN 207612105U
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- 239000000654 additive Substances 0.000 claims abstract description 19
- 239000004065 semiconductor Substances 0.000 claims description 18
- 238000007600 charging Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims description 9
- 230000001012 protector Effects 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a kind of electric tool class protection boards; including discharge loop, charge circuit, electric discharge overcurrent and short-circuit detecting circuit, overdischarge additives for overcharge protection circuit, excess temperature discharge protection circuit, battery core, equalizing circuit; the discharge loop is electrically connected with electric discharge overcurrent and short-circuit detecting circuit, overdischarge additives for overcharge protection circuit, excess temperature discharge protection circuit; the overdischarge additives for overcharge protection circuit is electrically connected with charge circuit, battery core, and the battery core is also connect with equalizing circuit.The utility model has the various defencive functions being charged and discharged; the overcurrent of hardware, short-circuit protection function; hardware equalizer processing; electric discharge overheat protector function; using the electric discharge adjustable mode of MOSFET activationary times; load end is prevented to open the phenomenon that pass cannot start when capacitive load, it is ensured that protection board normal table reliably working.
Description
Technical field
The utility model is related to protect field of circuit technology more particularly to a kind of electric tool class protection board.
Background technology
Currently, normal controller input terminal parallel electrolytic capacitance is not of uniform size, if electrolytic capacitor capacity in parallel compared with
When big, as capacitive load access battery pack moment, be equivalent to battery and charge to electrolytic capacitor, P- voltage falling times by
It output capacitor and is determined to the charging current of the capacitance, it is dynamic instantaneous to open start or stop in protection board, is equivalent to and is filled to electrolytic capacitor
Electricity, the activationary time for the MOSFET that discharges needs to be more than electric discharge MOSET startups plus P- terminal voltage fall times add load-lock
MOSFET release times could normally start.As long as increasing electric discharge MOSFET activationary times is prevented from controller parallel connection
Electrolytic capacitor, which influences protection board, cannot normally start phenomenon.Therefore, electric tool protection board band capacitive load size is not on the market
One, switch occurs not starting phenomenon once in a while, and causing protection to protect cannot reliably work normally.
Utility model content
In view of the drawbacks described above of the prior art, the technical problem to be solved by the utility model is to provide a kind of electronic works
Has class protection board, so as to solve the deficiencies in the prior art.
To achieve the above object, the utility model provides a kind of electric tool class protection board, including discharge loop, charging
Circuit, electric discharge overcurrent and short-circuit detecting circuit, overdischarge additives for overcharge protection circuit, excess temperature discharge protection circuit, battery core, balanced electricity
Road, the discharge loop and electric discharge overcurrent and short-circuit detecting circuit, overdischarge additives for overcharge protection circuit, excess temperature discharge protection circuit
Electrical connection, the overdischarge additives for overcharge protection circuit are electrically connected with charge circuit, battery core, and the battery core also connects with equalizing circuit
It connects, wherein：
The discharge loop include sequentially connected battery anode, load anode, load cathode, electric discharge MOS (M1~
M2), inspection leakage resistance (RN1~4), battery electrode；
The charge circuit includes sequentially connected charger anode, battery anode, battery electrode, inspection leakage resistance
(RN1~4), charging MOS (M3), isolating diode D9, charger cathode；
The electric discharge overcurrent and short-circuit detecting circuit include chip S-8261ABRMD-G3R, the chip S-
The grid of the 1 foot connection metal-oxide-semiconductor Q29 of 8261ABRMD-G3R, the source electrode ground connection of the metal-oxide-semiconductor Q29, the leakage of the metal-oxide-semiconductor Q29
Input terminal 12,13 feet of pole connection NAND gate U14A pass through resistance R73 connection power supplys VCC, the output of the NOT gate U14A simultaneously
Hold 11 feet by 6 foot of input terminal of diode D2 connection NOT gates U14C, 11 foot of output end of the NAND gate U14C passes through resistance
1 foot of input terminal of R63 connection NAND gates U14D, the output end of 2 foot of the input terminal connection NAND gate U14B of the NAND gate U14D
3 foot of output end of 10 feet, the NAND gate U14D passes through resistance R89 connections electric discharge MOS (M1~M2) grid, the electric discharge MOS
(M1~M2) connects resistance R83 between grid and source electrode；
The overdischarge additives for overcharge protection circuit includes chip R5478N101CD, 1 foot of the chip R5478N101CD
By the base stage of resistance RD1 connection PNP triodes Q1, the collector of the PNP triode Q1 passes through resistance R70 connections NPN tri-
Pole pipe Q27 base stages, the NPN triode Q27 collectors by 6 foot of input terminal of resistance R62 connection NAND gates U14C, it is described with
4 foot of output end of NOT gate U14C passes through 1 foot of input terminal of resistance R63 connection NAND gates U14D, the input of the NAND gate U14D
10 foot of output end of 2 feet connection NAND gate U14B, 3 foot of output end of the NAND gate U14D is held to discharge by resistance R89 connections
MOS (M1~M2) grid, the electric discharge MOS (M1~M2) connect resistance R83 between grid and source electrode；The chip
3 feet of R5478N101CD are passed through by the base stage of resistance RC1 connection PNP triodes Q2, the collector of the PNP triode Q2
Resistance R61, diode D3 connection NPN triode Q28 base stages, the collector of the NPN triode Q28 are separately connected with emitter
The grid and source electrode of charging MOS (M3)；
The excess temperature discharge protection circuit includes that discharge switch K1, the one end fuse F1, the fuse F1 pass through resistance
The one end R77 connection power supplys VCC, the fuse F1 other ends connection discharge switch K1, the discharge switch K1 other ends pass through
5 foot of input terminal of 5 foot of input terminal of resistance R69 connection NAND gates U14C, the NAND gate U14C also passes through resistance in parallel
R75, capacitance C20 ground connection, 6 foot of input terminal of the NAND gate U14C pass through resistance R72 connection power supply VCC, the discharge switch
The RC circuits that the K1 other ends are also connected with capacitance C21, resistance R88 is composed in series, the capacitance C21 of the RC circuits, resistance R88 connections
End is also connected with 8 foot of input terminal, 9 feet of NAND gate U14B, the discharge switch K1, fuse F1 also distinguish parallel resistance R79,
R80。
A kind of above-mentioned electric tool class protection board, the equalizing circuit are the equilibrium electricity based on MM3513C01NRH chips
Road, the wherein grid of the 5 feet connection metal-oxide-semiconductor QB1 of MM3513C01NRH chips, the drain electrode of the metal-oxide-semiconductor QB1 pass through equalizing resistance
RB2 connections battery core anode, the source electrode of the metal-oxide-semiconductor QB1 connect battery core cathode.
A kind of above-mentioned electric tool class protection board, the overdischarge additives for overcharge protection circuit and equalizing circuit are more
Group.
The utility model has the beneficial effects that：
There are the utility model the various defencive functions being charged and discharged, the overcurrent of hardware, short-circuit protection function, hardware to put down
Weighing apparatus processing, discharge overheat protector function, using electric discharge the adjustable mode of MOSFET activationary times, prevent load end be capacitive load when
Open the phenomenon that pass cannot start, it is ensured that protection board normal table reliably working.
The technique effect of the design of the utility model, concrete structure and generation is made furtherly below with reference to attached drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Description of the drawings
Fig. 1 is the overall structure block diagram of the utility model.
Fig. 2 is the discharge loop, charge circuit, electric discharge overcurrent and short-circuit detecting circuit schematic diagram of the utility model.
Fig. 3 is the overdischarge additives for overcharge protection circuit schematic diagram of the utility model.
Fig. 4 is the equalizing circuit schematic diagram of the utility model.
Specific implementation mode
As shown in Figure 1, a kind of electric tool class protection board, including discharge loop 1, charge circuit 2, electric discharge overcurrent and short circuit
Detection circuit 3, overdischarge additives for overcharge protection circuit 4, excess temperature discharge protection circuit 5, battery core 6, equalizing circuit 7, it is described to discharge back
Road 1 is electrically connected with electric discharge overcurrent and short-circuit detecting circuit 3, overdischarge additives for overcharge protection circuit 4, excess temperature discharge protection circuit 5, institute
Overdischarge additives for overcharge protection circuit 4 to be stated to be electrically connected with charge circuit 2, battery core 6, the battery core 6 is also connect with equalizing circuit 7,
In：
The discharge loop 1 include sequentially connected battery anode, load anode, load cathode, electric discharge MOS (M1~
M2), inspection leakage resistance (RN1~4), battery electrode；
The charge circuit 2 includes sequentially connected charger anode, battery anode, battery electrode, inspection leakage resistance
(RN1~4), charging MOS (M3), isolating diode D9, charger cathode；
The electric discharge overcurrent and short-circuit detecting circuit 3 include chip S-8261ABRMD-G3R, the chip S-
The grid of the 1 foot connection metal-oxide-semiconductor Q29 of 8261ABRMD-G3R, the source electrode ground connection of the metal-oxide-semiconductor Q29, the leakage of the metal-oxide-semiconductor Q29
Input terminal 12,13 feet of pole connection NAND gate U14A pass through resistance R73 connection power supplys VCC, the output of the NOT gate U14A simultaneously
Hold 11 feet by 6 foot of input terminal of diode D2 connection NOT gates U14C, 11 foot of output end of the NAND gate U14C passes through resistance
1 foot of input terminal of R63 connection NAND gates U14D, the output end of 2 foot of the input terminal connection NAND gate U14B of the NAND gate U14D
3 foot of output end of 10 feet, the NAND gate U14D passes through resistance R89 connections electric discharge MOS (M1~M2) grid, the electric discharge MOS
(M1~M2) connects resistance R83 between grid and source electrode；
The overdischarge additives for overcharge protection circuit 4 includes chip R5478N101CD, 1 foot of the chip R5478N101CD
By the base stage of resistance RD1 connection PNP triodes Q1, the collector of the PNP triode Q1 passes through resistance R70 connections NPN tri-
Pole pipe Q27 base stages, the NPN triode Q27 collectors by 6 foot of input terminal of resistance R62 connection NAND gates U14C, it is described with
4 foot of output end of NOT gate U14C passes through 1 foot of input terminal of resistance R63 connection NAND gates U14D, the input of the NAND gate U14D
10 foot of output end of 2 feet connection NAND gate U14B, 3 foot of output end of the NAND gate U14D is held to discharge by resistance R89 connections
MOS (M1~M2) grid, the electric discharge MOS (M1~M2) connect resistance R83 between grid and source electrode；The chip
3 feet of R5478N101CD are passed through by the base stage of resistance RC1 connection PNP triodes Q2, the collector of the PNP triode Q2
Resistance R61, diode D3 connection NPN triode Q28 base stages, the collector of the NPN triode Q28 are separately connected with emitter
The grid and source electrode of charging MOS (M3)；
The excess temperature discharge protection circuit 5 passes through resistance including discharge switch K1, the one end fuse F1, the fuse F1
The one end R77 connection power supplys VCC, the fuse F1 other ends connection discharge switch K1, the discharge switch K1 other ends pass through
5 foot of input terminal of 5 foot of input terminal of resistance R69 connection NAND gates U14C, the NAND gate U14C also passes through resistance in parallel
R75, capacitance C20 ground connection, 6 foot of input terminal of the NAND gate U14C pass through resistance R72 connection power supply VCC, the discharge switch
The RC circuits that the K1 other ends are also connected with capacitance C21, resistance R88 is composed in series, the capacitance C21 of the RC circuits, resistance R88 connections
End is also connected with 8 foot of input terminal, 9 feet of NAND gate U14B, the discharge switch K1, fuse F1 also distinguish parallel resistance R79,
R80。
In the present embodiment, the equalizing circuit 7 is the equalizing circuit based on MM3513C01NRH chips, wherein
The grid of the 5 feet connection metal-oxide-semiconductor QB1 of MM3513C01NRH chips, the drain electrode of the metal-oxide-semiconductor QB1 are connected by equalizing resistance RB2
6 anode of battery core, the source electrode of the metal-oxide-semiconductor QB1 connect 6 cathode of battery core.
In the present embodiment, the overdischarge additives for overcharge protection circuit 4 and equalizing circuit 7 are multigroup.
The principles of the present invention are as follows：
Charge circuit：It is filled from charger anode → battery anode → battery electrode → inspection leakage resistance (RN1~RN4) →
Electric MOS (M3) → isolating diode (D9) → charger cathode.
Multigroup chip U1 (R5478N101CD) is the voltage for detecting the core that often economizes on electricity, and is overcharged when detecting that battery core voltage is higher than
Electro-detection voltage value and when reaching overcharge delay time, the 3rd foot exports the corresponding triode Q1 conductings of low level → Q28 conductings
The GS pole tensions of → charging MOS are pulled low 0.3V or so (the CE extreme pressures of Q28 drop) → charging MOS ends → and cut off charge circuit.
Discharge loop：From battery anode → load anode → load cathode → electric discharge MOS (M1~M2) → inspection leakage resistance
(RN1~RN4) → battery electrode.
The detection of multigroup chip U1 (R5478N101CD) is often economized on electricity the voltage of core, when detecting that battery core voltage is less than overdischarge
When detecting voltage value and reaching overdischarge delay time, the corresponding triode Q2 conductings of the 1st foot output low level → Q27 conductings →
Every 6 foot of U14 is pulled low, and because U14 is 4 NAND gate IC, logical relation is as long as being low level there are one in two input pins
High level (can having 0 1) is exported, so the 4 feet output high level of U14 makes 1 foot of U14 be high level through R63 couplings；On in addition,
After electricity, K1, which connects F1 temperature switches, not to be had under excess temperature disconnection, U14 the 8th, 9 feet be that 2 feet of U14 of low level → then are high
3 feet of level → U14 are that low level → the GS pole tensions of electric discharge MOS are dragged down by R83 → MOS cut-offs → cut-out of discharging is discharged back
Road.
U13 (S-8261ABRMD-G3R) is that electric discharge overcurrent and discharge short detect IC；
When the voltage at the both ends RN1~RN4 is coupled to through R84 the 2nd foot of U13, when the both end voltage of inspection leakage resistance is more than U13
Electric discharge overcurrent, short-circuit detecting voltage setting value and beyond electric discharge overcurrent, short-circuit delay time, the 1 foot output low level of U13 →
6 feet that 12,13 feet of Q29 cut-offs → U14 are drawn high 11 feet output low level → U14 for high level → U14 by R73 resistance are drawn
The 4 feet output high level of low → U14 makes 1 foot of U14 be high level through R63 couplings；In addition, after the power is turned on, K1 connects F1 temperature and opens
Close under no excess temperature disconnection, U14 the 8th, 3 feet that 9 feet are low level → then 2 feet of U14 are high level → U14 be low electricity
Flat → the GS pole tensions of electric discharge MOS are dragged down by R83 → MOS that discharges ends → cut off discharge loop, to realize electric discharge overcurrent and
Short-circuit function is protected.
Discharge overheat protector：
In the case of the connections of discharge switch K 1, when environment temperature reaches the temperature value of F1 temperature switches setting, F1 is disconnected,
The 4th foot that the 5th foot of U14 is low level → U14 is high level makes the 1st feet of U14 be high level through R63 couplings；In addition, U14
8th, it is the GS pole tensions of low level → electric discharge MOS by R83 that 9 feet, which are 3 feet of low level → then 2 feet of U14 are high level → U14,
Dragging down → MOS that discharges ends → cuts off discharge loop, realizes electric discharge overheat protector function.
Connect K1 switch activators electric discharge MOSFET functions：
Under 1 disconnections of discharge switch K, when environment temperature is not up to the temperature value of F1 temperature switches setting, F1 is closed
Close, U14 the 5th, the 4th foot that 6 feet are low level → U14 is high level makes the 1st feet of U14 be high level through R63 couplings；In addition,
U14 the 8th, 3 feet that 9 feet are low level → then 2 feet of U14 are high level → U14 be low level → electric discharge MOS GS pole tensions
Being dragged down → MOS that discharges ends → by R83 cuts off discharge loop, realizes that discharge switch closes function.
When discharge switch K 1 is by being disconnected to connection process, when environment temperature is not up to the temperature value of F1 temperature switches setting
When F1 be closed, the 4th foot that the 5th foot of U14 is high level → U14 is low level makes the 1st feet of U14 be low level through R63 couplings；Separately
Outside, by C21, R88 series connection group RC circuits, VCC voltages are after K1 switch connections to C21 chargings, C21, R88 capacity and resistance value size
Determine filling time, that is, discharge MOSET activationary times, U14 the 8th, 9 feet be that 2 feet of U14 of high impulse level → then are low pulse
3 feet of level → U14 are high impulse level, when high impulse level time is more than electric discharge MOSET startups plus P- terminal voltages decline
Between along with that the 5th foot that the 6th feet of load-lock MOSFET release times → U14 are high level → U14 is high level → U14
2 feet that 4 feet are low level makes the 1st feet of U14 be the 8th of low level → U14 the through R63 couplings, 9 feet are the U14 of high impulse level → then
MOS conductings of discharging that 3 feet for low impulse level → U14 are high level → the GS pole tensions of electric discharge MOS have to power to be drawn high by R83 →
→ discharge loop is opened, it realizes and opens discharge switch activation electric discharge MOSFET circuit functions.
Equalizing circuit function：
UB1~UB12 is the voltage that equilibrium IC detects the core that often economizes on electricity, and is detected in balanced IC when detecting that battery core voltage is more than
Voltage value and when reaching balanced delay time, the 5th foot output high level → QB1~QB12 conductings of balanced IC, make it is corresponding
The conducting of the circuits weighing apparatus resistance RB24, i.e., battery core both end voltage is added on equalizing resistance both ends and discharges, and also makes passive type balanced,
Often economize on electricity core voltage is consumed on setting equalizing voltage platform point, is discharged using resistance-type, and achievees the purpose that equilibrium.
To sum up, various defencive functions of the utility model with charging and discharging, the overcurrent of hardware, short-circuit protection function,
Hardware equalizer processing, overheat protector function of discharging, using the electric discharge adjustable mode of MOSFET activationary times, it is capacitive to prevent load end
The phenomenon that pass cannot start is opened when load, it is ensured that protection board normal table reliably working.
The preferred embodiment of the utility model described in detail above.It should be appreciated that the ordinary skill people of this field
Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to the design of the utility model in domain
Available technical solution is tested, it all should be in the protection domain being defined in the patent claims.
Claims (3)
1. a kind of electric tool class protection board, it is characterised in that：Including discharge loop (1), charge circuit (2), electric discharge overcurrent and
Short-circuit detecting circuit (3), overdischarge additives for overcharge protection circuit (4), excess temperature discharge protection circuit (5), battery core (6), equalizing circuit
(7), the discharge loop (1) is put with electric discharge overcurrent and short-circuit detecting circuit (3), overdischarge additives for overcharge protection circuit (4), excess temperature
Electric protection circuit (5) is electrically connected, and the overdischarge additives for overcharge protection circuit (4) is electrically connected with charge circuit (2), battery core (6), institute
Battery core (6) is stated also to connect with equalizing circuit (7), wherein：
The discharge loop (1) include sequentially connected battery anode, load anode, load cathode, electric discharge MOS (M1~
M2), inspection leakage resistance (RN1~4), battery electrode；
The charge circuit (2) includes sequentially connected charger anode, battery anode, battery electrode, inspection leakage resistance
(RN1~4), charging MOS (M3), isolating diode D9, charger cathode；
The electric discharge overcurrent and short-circuit detecting circuit (3) include chip S-8261ABRMD-G3R, the chip S-8261ABRMD-
The grid of the 1 foot connection metal-oxide-semiconductor Q29 of G3R, the source electrode ground connection of the metal-oxide-semiconductor Q29, the drain electrode connection of the metal-oxide-semiconductor Q29 with it is non-
Input terminal 12,13 feet of door U14A are passed through by 11 foot of output end of resistance R73 connection power supplys VCC, the NOT gate U14A simultaneously
6 foot of input terminal of diode D2 connection NOT gates U14C, 11 foot of output end of the NAND gate U14C by resistance R63 connections with it is non-
1 foot of input terminal of door U14D, 10 foot of output end of 2 foot of the input terminal connection NAND gate U14B of the NAND gate U14D, it is described with
3 foot of output end of NOT gate U14D passes through resistance R89 connections electric discharge MOS (M1~M2) grid, electric discharge MOS (M1~M2) grid
Resistance R83 is connected between source electrode；
The overdischarge additives for overcharge protection circuit (4) includes chip R5478N101CD, and 1 foot of the chip R5478N101CD is logical
The base stage of resistance RD1 connection PNP triodes Q1 is crossed, the collector of the PNP triode Q1 passes through tri- poles resistance R70 connections NPN
Pipe Q27 base stages, the NPN triode Q27 collectors by 6 foot of input terminal of resistance R62 connection NAND gates U14C, it is described with it is non-
4 foot of output end of door U14C passes through 1 foot of input terminal of resistance R63 connection NAND gates U14D, the input terminal 2 of the NAND gate U14D
Foot connects 10 foot of output end of NAND gate U14B, and 3 foot of output end of the NAND gate U14D passes through resistance R89 connections electric discharge MOS
(M1~M2) grid, the electric discharge MOS (M1~M2) connect resistance R83 between grid and source electrode；The chip R5478N101CD
3 feet by the base stage of resistance RC1 connection PNP triodes Q2, the collector of the PNP triode Q2 passes through resistance R61, two poles
Pipe D3 connection NPN triode Q28 base stages, collector and the emitter of the NPN triode Q28 are separately connected charging MOS (M3)
Grid and source electrode；
The excess temperature discharge protection circuit (5) includes that discharge switch K1, the one end fuse F1, the fuse F1 pass through resistance
The one end R77 connection power supplys VCC, the fuse F1 other ends connection discharge switch K1, the discharge switch K1 other ends pass through
5 foot of input terminal of 5 foot of input terminal of resistance R69 connection NAND gates U14C, the NAND gate U14C also passes through resistance in parallel
R75, capacitance C20 ground connection, 6 foot of input terminal of the NAND gate U14C pass through resistance R72 connection power supply VCC, the discharge switch
The RC circuits that the K1 other ends are also connected with capacitance C21, resistance R88 is composed in series, the capacitance C21 of the RC circuits, resistance R88 connections
End is also connected with 8 foot of input terminal, 9 feet of NAND gate U14B, the discharge switch K1, fuse F1 also distinguish parallel resistance R79,
R80。
2. a kind of electric tool class protection board as described in claim 1, it is characterised in that：The equalizing circuit (7) be based on
The equalizing circuit of MM3513C01NRH chips, the wherein grid of the 5 feet connection metal-oxide-semiconductor QB1 of MM3513C01NRH chips, it is described
By equalizing resistance RB2 connection battery cores (6) anode, the source electrode connection battery core (6) of the metal-oxide-semiconductor QB1 is negative for the drain electrode of metal-oxide-semiconductor QB1
Pole.
3. a kind of electric tool class protection board as described in claim 1, it is characterised in that：The overdischarge additives for overcharge protection electricity
Road (4) and equalizing circuit (7) are multigroup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721925826.4U CN207612105U (en) | 2017-12-29 | 2017-12-29 | A kind of electric tool class protection board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721925826.4U CN207612105U (en) | 2017-12-29 | 2017-12-29 | A kind of electric tool class protection board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207612105U true CN207612105U (en) | 2018-07-13 |
Family
ID=62799965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721925826.4U Expired - Fee Related CN207612105U (en) | 2017-12-29 | 2017-12-29 | A kind of electric tool class protection board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207612105U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110943512A (en) * | 2019-11-29 | 2020-03-31 | 歌尔科技有限公司 | Wireless charging method and system and electronic equipment |
| CN116382385A (en) * | 2023-04-03 | 2023-07-04 | 无锡市稳先微电子有限公司 | Temperature control method, temperature control circuit, intelligent electronic switch and automobile |
-
2017
- 2017-12-29 CN CN201721925826.4U patent/CN207612105U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110943512A (en) * | 2019-11-29 | 2020-03-31 | 歌尔科技有限公司 | Wireless charging method and system and electronic equipment |
| CN116382385A (en) * | 2023-04-03 | 2023-07-04 | 无锡市稳先微电子有限公司 | Temperature control method, temperature control circuit, intelligent electronic switch and automobile |
| CN116382385B (en) * | 2023-04-03 | 2024-03-05 | 无锡市稳先微电子有限公司 | Temperature control method, temperature control circuit, intelligent electronic switch and automobile |
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