CN209313464U - Power supply unit and electric tool - Google Patents
Power supply unit and electric tool Download PDFInfo
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- CN209313464U CN209313464U CN201822176896.5U CN201822176896U CN209313464U CN 209313464 U CN209313464 U CN 209313464U CN 201822176896 U CN201822176896 U CN 201822176896U CN 209313464 U CN209313464 U CN 209313464U
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- power supply
- switch
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- assembly
- battery pack
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a kind of power supply unit and electric tools.The device includes multiple Power Supply Assemblies, main switch and load.Each Power Supply Assembly includes battery pack mounting portion, one-way conduction component and control unit, for being removably installed battery pack, is connected in series after one-way conduction component and control unit are connected in parallel with battery pack mounting portion；Multiple Power Supply Assemblies are connected in parallel, and form current supply circuit, to be load supplying when main switch is closed；Current supply circuit and institute's main switch and connected in series with the load.Embodiment according to the present utility model is load parallel operation by multiple groups Power Supply Assembly, and is mutually filled being arranged between the battery pack of one-way conduction component and control unit to prevent multiple Power Supply Assemblies in Power Supply Assembly, and the safety of power supply unit is improved.
Description
Technical field
The utility model relates to power tools technology field more particularly to a kind of power supply unit and electric tools.
Background technique
Electric tool is using a kind of relatively broad power tool for holding with a hand operation.Electric tool, which usually passes through, to be added
It carries Power Supply Assembly (such as battery pack) and electric current is provided, driving load (such as motor) rotation, so that it is (such as past by transmission component
Answer a pager's call structure) drive the work operations head to carry out operation.
In the related art, the Power Supply Assembly in electric tool in more and more products is carried out using multiple battery packs
Power supply, for example, by using the multiple battery packs being connected in parallel, to improve the electric power output of electric tool.However, multiple electricity in parallel
Chi Bao is likely to be at different states (such as remaining capacity, voltage difference etc.), it is understood that there may be mutually charges between multiple batteries
The case where, generate security risk.
Utility model content
In view of this, battery pack in parallel can be prevented the utility model proposes a kind of power supply unit and electric tool
Between mutually charge, avoid security risk.
One side according to the present utility model provides a kind of power supply unit, comprising: multiple Power Supply Assemblies, main switch with
And load,
Each Power Supply Assembly includes battery pack mounting portion, one-way conduction component and control unit, the battery pack mounting portion
For being removably installed battery pack, the one-way conduction component and the control unit are pacified after being connected in parallel with the battery pack
Dress portion is connected in series；
The multiple Power Supply Assembly is connected in parallel, and forms current supply circuit, to be described negative in main switch closure
Carry power supply；
The current supply circuit and the main switch and the connected in series with the load.
In one possible implementation, the control unit includes at least one one-way conduction component.
In one possible implementation, the one-way conduction component includes diode, the anode tap of the diode
It is electrically connected the positive terminal of battery pack, the cathode terminal of the diode is electrically connected the main switch；The control unit includes
First diode, the anode tap of the first diode are electrically connected the anode tap of the diode, the first diode
Cathode terminal is electrically connected the cathode terminal of the diode.
In one possible implementation, the control unit includes electric-controlled switch, and described device further includes first opening
Pass and control assembly, the first switch and the connected in series with the load,
Wherein, when the main switch is closed, the electric-controlled switch of each Power Supply Assembly is disconnected, the first switch closure,
The current supply circuit is respectively the load supplying via the one-way conduction component of each Power Supply Assembly.
In one possible implementation, the control assembly is used for:
Judge whether to meet power switching condition；
When meeting the power switching condition, controls the first switch and disconnect；
When first switch disconnection reaches first time interval, the electric-controlled switch closure of each Power Supply Assembly is controlled；
When electric-controlled switch closure reaches the second time interval, the first switch closure is controlled, so that the confession
Electrical circuit is respectively the load supplying via the electric-controlled switch of each Power Supply Assembly.
In one possible implementation, the power switching condition includes following one kind:
The temperature of at least one one-way conduction element reaches temperature threshold；
The time of the main switch closure reaches first time threshold.
In one possible implementation, described device further include:
Self-locking switch circuit is connected in series between the current supply circuit and the power supply circuit of the control assembly, described
When self-locking switch circuit is connected, the current supply circuit is connected with the power supply circuit, so that the current supply circuit is the control
Assembly power supply,
Wherein, the control assembly is used for:
When the main switch disconnects, judge whether to meet outage condition；
It when meeting outage condition, controls the self-locking switch circuit and disconnects, so that the control assembly powers off.
In one possible implementation, the outage condition includes:
The time that the main switch disconnects reaches second time threshold.
In one possible implementation, the control assembly is used for:
When the time of main switch closure reaching first time threshold, controls the first switch and disconnect；
When first switch disconnection reaches first time interval, the electric-controlled switch closure of each Power Supply Assembly is controlled；
When electric-controlled switch closure reaches the second time interval, the first switch closure is controlled, so that the confession
Electrical circuit is respectively the load supplying via the electric-controlled switch of each Power Supply Assembly.
Another aspect according to the present utility model provides a kind of control method of power supply unit, the power supply unit packet
Include in parallel multiple Power Supply Assemblies, main switch, load and first switch, each Power Supply Assembly include electric-controlled switch in parallel and
One-way conduction component, in main switch closure, the electric-controlled switch of each Power Supply Assembly is disconnected, the first switch closure,
Each Power Supply Assembly is respectively the load supplying via one-way conduction component,
The described method includes:
Judge whether to meet power switching condition；
When meeting the power switching condition, controls the first switch and disconnect；
When first switch disconnection reaches first time interval, the electric-controlled switch closure of each Power Supply Assembly is controlled；
When electric-controlled switch closure reaches the second time interval, the first switch closure is controlled, so that each confession
Electrical component is respectively the load supplying via electric-controlled switch.
In one possible implementation, the power switching condition includes following one kind:
The temperature of at least one one-way conduction element reaches temperature threshold；
The time of the main switch closure reaches first time threshold.
In one possible implementation, the method also includes:
When the main switch disconnects, judge whether to meet outage condition；
When meeting outage condition, the self-locking switch circuit for controlling the power supply unit is disconnected, so that the control assembly
Power-off,
Wherein, the outage condition includes: the time of the main switch disconnection to reach second time threshold.
Another aspect according to the present utility model provides a kind of electric tool, comprising: power supply unit as described above,
By being installed to multiple battery packs of the power supply unit as electric tool power supply.
Embodiment according to the present utility model is load parallel operation by multiple groups Power Supply Assembly, and in Power Supply Assembly
It is arranged between the battery pack of one-way conduction component and control unit to prevent multiple Power Supply Assemblies and mutually fills, improves power supply unit
Safety.
According to below with reference to the accompanying drawings to detailed description of illustrative embodiments, the other feature and aspect of the utility model will
It becomes apparent.
Detailed description of the invention
Comprising in the description and constitute the attached drawing of part of specification and specification to together illustrate this practical new
Exemplary embodiment, feature and the aspect of type, and for explaining the principles of the present invention.
Fig. 1 shows a kind of block diagram of power supply unit according to an embodiment of the present invention.
Fig. 2 shows the block diagrams according to a kind of power supply unit of an embodiment of the present invention.
Fig. 3 shows a kind of circuit diagram of power supply unit according to an embodiment of the present invention.
Fig. 4 shows a kind of circuit diagram of power supply unit according to an embodiment of the present invention.
Fig. 5 shows a kind of flow chart of the control method of power supply unit according to an embodiment of the present invention.
Specific embodiment
The various exemplary embodiments, feature and aspect of the utility model are described in detail below with reference to attached drawing.In attached drawing
Identical appended drawing reference indicates element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings,
It is unless otherwise indicated, it is not necessary to attached drawing drawn to scale.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the utility model, given in specific embodiment below numerous specific
Details.It will be appreciated by those skilled in the art that without certain details, the utility model equally be can be implemented.In some realities
In example, method well known to those skilled in the art, means, element and circuit are not described in detail, in order to highlight this reality
With novel purport.
Fig. 1 shows a kind of block diagram of power supply unit according to an embodiment of the present invention.The power supply unit can be applied
In electric tool.As shown in Figure 1, the power supply unit includes: multiple Power Supply Assemblies, main switch 11 and load (motor) 12.
Each Power Supply Assembly includes battery pack mounting portion, one-way conduction component and control unit, the battery pack mounting portion
For being removably installed battery pack, the one-way conduction component and the control unit are pacified after being connected in parallel with the battery pack
Dress portion is connected in series；
The multiple Power Supply Assembly is connected in parallel, and forms current supply circuit, to be described negative in main switch closure
Carry power supply；
The current supply circuit and the main switch and the connected in series with the load.
Embodiment according to the present utility model is load supplying by multiple groups Power Supply Assembly parallel connection, and in Power Supply Assembly
Charging mutually (referred to as " mutually filling ") is set between the battery pack of one-way conduction component and control unit to prevent multiple Power Supply Assemblies,
Improve the safety of power supply unit, reliability.
Below by taking the quantity of Power Supply Assembly is 2 as an example, said to according to the power supply unit of the utility model embodiment
It is bright.It should be appreciated that the Power Supply Assembly of respective numbers, the utility model pair can be arranged according to the actual use situation of electric tool
This is with no restriction.
As shown in Figure 1, the power supply unit may include Power Supply Assembly 13 and 14, wherein Power Supply Assembly 13 may include battery pack
Mounting portion 131, one-way conduction component 132 and control unit 133, Power Supply Assembly 14 may include battery pack mounting portion 141, unidirectionally lead
Logical component 142 and control unit 143.Battery pack can be removably installed in battery pack mounting portion 131 and 141 respectively (e.g., to buckle
Connection).It is connected in series after the branch and control unit 133 of one-way conduction component 132 are connected in parallel with battery pack mounting portion 131；
It is connected in series after the branch and control unit 143 of one-way conduction component 142 are connected in parallel with battery pack mounting portion 141.Power supply group
Part 13 and 14 is connected in parallel, and forms current supply circuit, to be 12 power supply of load when main switch 11 is closed.
In one possible implementation, main switch 11 can be, for example, the trigger of electric tool, can be according to user
Operation and be opened or closed, thus open or closed current supply circuit and load 12 between electric connection.Load 12 can example
For example motor.Battery pack can be, for example, lithium battery pack, the rechargeable batteries such as fuel cell.User can will be matched
Battery pack installs (insertion) battery pack mounting portion 131 and 141 respectively, so that in multiple battery packs access power supply unit.
In one possible implementation, one-way conduction component 132 and 142 can be diode, such as Schottky two
Pole pipe etc..When electric tool is not keyed up (disconnection of main switch 11), the circuit formed between Power Supply Assembly 13 and 14 is unidirectional because having
Conductive member, if occurring to be only capable of the reverse leakage by one-way conduction component 132 and 142 when mutually filling between Power Supply Assembly 13 and 14
Stream mutually charging, at this moment for leakage current in microampere order, security risk is low, meets security needs.
When electric tool is switched on (closure of main switch 11), the electric current of battery pack via one-way conduction component 132 and 142 from
Power Supply Assembly flow direction load 12, for 12 power supply of load.If the voltage difference between battery pack is larger, the high battery pack of voltage is first
Electric discharge, 2 battery packs are discharged together when voltage reaches unanimity.
It is multiple when electric tool is switched on (closure of main switch 11) when in one embodiment, according to multiple Power Supply Assemblies
The electric current of battery pack is respectively via one-way conduction component flow direction load 12, for 12 power supply of load.If the voltage between battery pack
Difference is larger, then the high battery pack of voltage is first discharged, and multiple battery packs are discharged together when voltage reaches unanimity.
Fig. 2 shows the block diagrams according to a kind of power supply unit of an embodiment of the present invention.As shown in Fig. 2, in one kind
In possible implementation, control unit 133 and control unit 143 can respectively include electric-controlled switch 134 and 144, automatically controlled to open
Closing 134 and 144 may be, for example, electromagnetic relay etc..
In one possible implementation, which can also include first switch 15 and control assembly 16.Control
Component 16 processed can be connect with main switch 11, first switch 15 and electric-controlled switch 134 and 144.Wherein, control assembly 16 can be with
It is realized by special hardware circuit, general procedure hardware (such as CPU, single-chip microcontroller, field programmable logic device can also be passed through
FPGA etc.) combine executable logical order to realize, to execute the course of work of control assembly, wherein executable logical order can
To be realized based on prior art means.
In one possible implementation, which can also be including first switch 15 and control assembly 16, certainly
Lock-switch circuit 17；Control assembly 16 can be connect with main switch 11, first switch 15 and electric-controlled switch 134 and 144.Its
In, control assembly 16 can be realized by special hardware circuit, can also by general procedure hardware (such as CPU, single-chip microcontroller,
Field programmable logic device FPGA etc.) combine executable logical order to realize, to execute the course of work of control assembly,
In, executable logical order can be realized based on prior art means.Self-locking switch circuit 17, to be closed (i.e. in main switch
When detecting that electric tool powers on, locking control power supply prevents frequent switching (e.g., electric-controlled switch).To guarantee main switch 11 disconnected
Fall trigger (main switch 11 disconnects, and restores the position to initial position, when not triggering) and keeps preset time (e.g., 10 minutes, etc.)
Control assembly power supply.
In one possible implementation, control assembly 16, the setting of self-locking switch circuit 17 are opened in a control panel, master
When closing 11 closure, control panel is powered on, and 16 Timer of control assembly starts timing, reaches preset time (e.g., 10 minutes, etc.)
Control panel power-off.If main switch 11 is closed on the way, disconnect, when reclosing, timer restarts timing until reaching default
The power-off of time (e.g., 10 minutes, etc.) control panel.
In one possible implementation, control assembly 16, the setting of self-locking switch circuit 17 are opened in a control panel, master
When closing 11 closure, control panel is powered on, and (e.g., triode, diode are connected in parallel to the two of main switch 11 to the switch in control assembly
End, when such main switch 11 disconnects, the switch in the control assembly is still closed, and then maintains the power supply of control panel, passes through meter
When device timing, reaching the control panel power-off of preset time (e.g., 10 minutes, etc.), (e.g., processor issues power-off in control assembly
It instructs to the triggering end of the switch, switch cut-off, control panel power-off).
In one possible implementation, first switch 15 can be connected in series with load 12, and be connected to control group
Part 16.First switch 15 can be for example including the switching circuit of one or more metal-oxide-semiconductors, can be under the control of control assembly 16
It is opened or closed (e.g., using U when three-phase motor, when V, W, using 6 metal-oxide-semiconductors).
In one possible implementation, when main switch is closed, the electric-controlled switch of each Power Supply Assembly is disconnected, and first
It closes the switch, current supply circuit is respectively the load supplying via the one-way conduction component of each Power Supply Assembly.
Fig. 3 shows a kind of circuit diagram of power supply unit according to an embodiment of the present invention.As shown in figure 3,
PACK1 and PACK2 is mounted battery pack, and D1 and D2 are one-way conduction component, and K1 and K2 are electric-controlled switch, is opened based on SW
It closes, M is load, and Q is first switch.When electric tool is switched on (main switch SW closure), (closure) is connected in first switch Q, electricity
The electric current that PACK1 and PACK2 is wrapped in pond flows to load M from Power Supply Assembly via one-way conduction component D1 and D2, for load M power supply.
In one possible implementation, the control assembly can be used for:
Judge whether to meet power switching condition；
When meeting the power switching condition, controls the first switch and disconnect；
When first switch disconnection reaches first time interval, the electric-controlled switch closure of each Power Supply Assembly is controlled；
When electric-controlled switch closure reaches the second time interval, the first switch closure is controlled, so that the confession
Electrical circuit is respectively the load supplying via the electric-controlled switch of each Power Supply Assembly.
For example, during electric tool work, it can be determined that whether meet power switching condition.The power switching item
Part may include following one kind:
The temperature of at least one one-way conduction element reaches temperature threshold；
The time of the main switch closure reaches first time threshold.
In one possible implementation, can be when the time that main switch is closed reaching first time threshold, judgement
Meet power switching condition.The first time threshold can be the time that voltage between multiple battery packs reaches balance, such as should
First time threshold can be 10s, 20s with value.When the time of main switch closure reaching first time threshold, it is believed that more
Voltage tends to be balanced even if power supply outward directly in parallel between battery pack in a battery pack, and mutually charging stream is also smaller, meets safety
The requirement of property.Determine whether the time of main switch closure reaches by hardware modes such as timer/counters in the present embodiment
First time threshold, the utility model reach the mode of first time threshold not to the specific value of first time threshold and determination
It is restricted.
In one possible implementation, temperature threshold can be reached in the temperature of at least one one-way conduction element
When, judgement meets power switching condition.Electric tool is switched on during work, and the temperature of one-way conduction element increases, it is possible to create
Security risk.In such a case it is possible to switch power supply mode.It can be by the way that the temperature sensor at one-way conduction element be arranged in
Determine one-way conduction component temperature, the utility model is to the specific value of temperature threshold and the determination side of one-way conduction component temperature
Formula is with no restriction.
In one possible implementation, if meeting power switching condition, control assembly can control first and open
It closes Q to disconnect, the entire of short duration open circuit of circuit (time of the open circuit is no more than 500ms, such as tens ms), load M temporarily ceases work；
Control assembly control electric-controlled switch closure in the meantime, is shorted one-way conduction element；First switch Q conducting, entire electricity are controlled again
Road conducting, load M work on.In the present embodiment, first switch Q is disconnected, the entire of short duration open circuit of circuit, and the time is very short (e.g.,
Tens ms), user is detectable the pause of motor.In the present embodiment, (bypass) is shorted by electric-controlled switch (such as relay)
One-way conduction unit, such high current flow through the electric-controlled switch, almost without pressure drop, the power consumption very little of the electric-controlled switch, more singly
Small to onunit calorific value, the stability and trust for improving Power Supply Assembly are thought.The action process of this implementation: main switch
(closure), first switch Q conducting；If meeting power switching condition (e.g., running 20S), then control assembly controls first switch Q
(time of the open circuit is no more than 500ms, such as tens ms) is disconnected, controls electric-controlled switch closure in the meantime, first switch Q is led
Logical, entire circuit restores electricity.In this way, it can be supplied when long-time is powered from via one-way conduction component for load
It is load supplying, pressure drop (example caused by one-way conduction component when can be avoided large load current that cutting, which changes into via electric-controlled switch,
If diode in the case that band carry (a few peaces), may have the pressure drop of 0.7V or so) and itself temperature increase caused by safety
Risk (such as diode power consumption is larger in large load current, and temperature increases very fast when powering for a long time).
In one possible implementation, when above-mentioned first switch Q disconnection reach first time interval (such as
When 20ms), electric-controlled switch K1 and the K2 closure of each Power Supply Assembly can control, so that one-way conduction component D1 and D2 short circuit；
When electric-controlled switch K1 and K2 closure reach the second time interval (such as 30ms), first switch Q conducting, entire electricity can control
Road conducting, load M work on.Wherein, the second time interval can be greater than or equal to the on-off switching time of electric-controlled switch, this
Utility model to the specific value of first time interval and the second time interval with no restriction.
In this way, can long-time power when from via one-way conduction component be load power switching at via
Electric-controlled switch is load supplying, pressure drop caused by one-way conduction component when can be avoided large load current (such as diode is in band
In the case of carrying (a few peaces), may there is the pressure drop of 0.7V or so) and itself temperature increase caused by security risk (such as big
Diode power consumption is larger when load current, and temperature increases very fast when powering for a long time).
By first making entire circuit breaker, restores electricity, can be cut to avoid power supply again after electric-controlled switch K1 and K2 closure
Short circuit during changing；Also, the switching of power supply mode is realized in shorter time interval (tens ms), user will not
The pause for perceiving motor (load) ensure that the continuous work of electric tool.
In one possible implementation, control assembly can also be used in: when the main switch disconnects, judge whether there is
Battery pack is disassembled；When there is battery pack to be disassembled, the electric-controlled switch for controlling each Power Supply Assembly is disconnected.
For example, during current supply circuit is respectively load supplying via the electric-controlled switch of each Power Supply Assembly, if
Electric tool stops working (main switch disconnection), then electric-controlled switch K1 and K2 can be kept to be closed preset the time (such as 10 minutes
Deng), avoid due to user in short-term switch on/off electric tool and lead to electric-controlled switch frequent switching.Electric-controlled switch K1 and K2 is being kept to close
During conjunction, it can be determined that the state of the battery pack of battery pack mounting portion.If there is battery pack is disassembled or is replaced, then can control
Electric-controlled switch K1 and K2 are disconnected, so that being isolated between the battery pack after replacement via his unit is unidirectionally led, to prevent battery
Mutually charging is connected between packet, improves the safety of power supply unit.
As shown in Fig. 2, in one possible implementation, which may also include self-locking switch circuit 17.From
Lock-switch circuit 17 is connected in series between current supply circuit and the power supply circuit of control assembly, when self-locking switch circuit 17 is connected,
Current supply circuit is connected with power supply circuit, so that current supply circuit is control assembly power supply.
For example, self-locking switch circuit 17 can be used to implement the self-locking of circuit and autotomy that (circuit, which reaches, to be set for electric control
Fixed condition, down circuitry when such as timing by 10 minutes).When being equipped with battery pack in Power Supply Assembly, self-locking switch circuit 17
Conducting, so that each Power Supply Assembly is connected with the power supply circuit of control assembly 16, so that each Power Supply Assembly is power supply circuit power supply, control
16 electrifying startup of component processed, is able to carry out the various functions of control assembly 16.
During normal operation (the standby or work) of power supply unit, control of the self-locking switch circuit 17 in control assembly
Conducting is locked as under signal control (for example, the control signal output of control assembly exports high level to self-locking switch circuit
Control signal input), the power supply of control assembly 16 is kept, is realized from lock control.
In one possible implementation, control assembly is also used to: when the main switch disconnects, judging whether to meet
Outage condition；When meeting outage condition, control self-locking switch circuit is disconnected, so that control assembly powers off.
For example, during current supply circuit is respectively load supplying via the electric-controlled switch of each Power Supply Assembly, if
Electric tool stops working (main switch disconnection), then electric-controlled switch K1 and K2 can be kept to be closed, avoid opening in short-term due to user
Powered-down power driven tools and lead to electric-controlled switch frequent switching.During keeping electric-controlled switch K1 and K2 closure, it can be determined that whether full
Sufficient outage condition.
In one possible implementation, outage condition includes: the time of main switch disconnection to reach second time threshold.
If the time that main switch disconnects reach second time threshold (such as 10 minutes, the type of 20 minutes view applications or tool
Depending on), it may be considered that not using electric tool in user's short time, self-locking switch circuit 17 can be in the control of control assembly
(for example, the control signal output of control assembly exports low level to the control signal of self-locking switch circuit under signal control processed
Input terminal) it disconnects, so that control assembly 16 powers off, realize electric control of autotomying.Meanwhile the electric-controlled switch K1 and K2 of Power Supply Assembly
Power-off, switch K1 and K2 are disconnected.
In this way, can reduce power supply unit it is standby when power consumption, improve the power supply efficiency of power supply unit,
And significantly improve the stand-by time of power supply unit.
In one possible implementation, control unit may include at least one one-way conduction component.
In one possible implementation, control unit may include relay, MOS switch, and triode etc. is therein
One kind or combinations thereof.
Fig. 4 shows a kind of circuit diagram of power supply unit according to an embodiment of the present invention.As shown in figure 4,
Control unit can respectively include the model of one-way conduction component (first diode) D3 and D4, first diode D3 and D4 with
The model of one-way conduction component D1, D2 can be identical.Similar with Fig. 3, in Fig. 4, PACK1 and PACK2 are mounted battery pack,
D1 and D2 is one-way conduction component, and SW is main switch, and M is load, and Q is first switch.It should be appreciated that control unit may include
Multiple one-way conduction components, the utility model to this with no restriction.
For example, one-way conduction component D1~D4 can be diode；Diode D1 anode tap and diode D3 anode
End is electrical connected, and diode D1 cathode terminal is electrical connected with diode D3 cathode terminal.Diode D2 anode tap and diode D4 sun
It is extremely electrical connected, diode D2 cathode terminal is electrical connected with diode D4 cathode terminal.D1~D4 can be in one embodiment
The Schottky diode of TO-220 encapsulation, the forward conduction voltage drop of such Schottky diode is small, and overcurrent capability is strong, reversed to leak
Electric current is smaller, good heat dissipation.In this way, the electric current of battery pack is respectively via multiple when electric tool is switched on (main switch SW closure)
One-way conduction component D1~D4 flows to load M from Power Supply Assembly, for load M power supply.
In this way, while preventing the battery pack between multiple Power Supply Assemblies from mutually filling, multiple lists can be passed through
It is shunted to conductive member, so that the electric current of each one-way conduction component becomes smaller, forward conduction voltage drop becomes smaller, quantitative change of generating heat
It is small, to improve the safety of power supply unit.
It is load parallel operation by multiple groups Power Supply Assembly according to the various aspects of the utility model embodiment, and is supplying
It is arranged mutually to fill between the battery pack of one-way conduction component and control unit to prevent multiple Power Supply Assemblies in electrical component and leads to battery
Packet damage, improves the safety of power supply unit.
According to the various aspects of the utility model embodiment, electricity is provided for electric tool by multiple groups Power Supply Assembly parallel connection
Can, and mutually filled being arranged between the battery pack of one-way conduction component and control unit to prevent multiple Power Supply Assemblies in Power Supply Assembly
Cause battery pack to be damaged, improves the safety of power supply unit.Electric tool can be grass trimmer, grass-mowing machine, pruner, chain saw
Class, cleaning machine etc. tool are ground in class, angle.
Fig. 5 shows a kind of flow chart of the control method of power supply unit according to an embodiment of the present invention.Such as Fig. 5
It is shown, in one possible implementation, the power supply unit include multiple Power Supply Assemblies in parallel, main switch, load and
First switch, each Power Supply Assembly include electric-controlled switch and one-way conduction component in parallel.In main switch closure, each
The electric-controlled switch of Power Supply Assembly disconnects, and the first switch closure, each Power Supply Assembly is respectively institute via one-way conduction component
State load supplying.
This method comprises:
Step S51 judges whether to meet power switching condition；
Step S52 controls the first switch and disconnects when meeting the power switching condition；
Step S53 controls the automatically controlled of each Power Supply Assembly and opens when first switch disconnection reaches first time interval
It closes and closes；
Step S54 controls the first switch closure when electric-controlled switch closure reaches the second time interval, with
Make each Power Supply Assembly respectively via the electric-controlled switch load supplying.
In one possible implementation, the power switching condition includes following one kind:
The temperature of at least one one-way conduction element reaches temperature threshold；
The time of the main switch closure reaches first time threshold.
In one possible implementation, this method may also include that
When the main switch disconnects, judge whether to meet outage condition；
When meeting outage condition, the self-locking switch circuit for controlling the power supply unit is disconnected, so that the control assembly
Power-off,
Wherein, the outage condition includes: the time of the main switch disconnection to reach second time threshold.
Each embodiment of the utility model is described above, above description is exemplary, and non-exclusive, and
And it is also not necessarily limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for
Many modifications and changes are obvious for those skilled in the art.The choosing of term used herein
It selects, it is intended to best explain the principle of each embodiment, practical application or to the technological improvement in market, or make the art
Other those of ordinary skill can understand each embodiment disclosed herein.
Claims (10)
1. a kind of power supply unit characterized by comprising multiple Power Supply Assemblies, main switch and load, each Power Supply Assembly packet
Battery pack mounting portion, one-way conduction component and control unit are included, the battery pack mounting portion is used to be removably installed battery pack,
The one-way conduction component and the control unit are connected in series after being connected in parallel with the battery pack mounting portion；
The multiple Power Supply Assembly is connected in parallel, and forms current supply circuit, to supply in main switch closure for the load
Electricity；
The current supply circuit and the main switch and the connected in series with the load.
2. the apparatus according to claim 1, which is characterized in that the control unit includes at least one one-way conduction portion
Part.
3. the apparatus according to claim 1, which is characterized in that the one-way conduction component includes diode, two pole
The anode tap of pipe is electrically connected the positive terminal of battery pack, and the cathode terminal of the diode is electrically connected the main switch；The control
Component processed includes first diode, and the anode tap of the first diode is electrically connected the anode tap of the diode, and described
The cathode terminal of one diode is electrically connected the cathode terminal of the diode.
4. the apparatus according to claim 1, which is characterized in that the control unit includes electric-controlled switch, and described device is also
Including first switch and control assembly, the first switch and the connected in series with the load, wherein be closed in the main switch
When, the electric-controlled switch of each Power Supply Assembly disconnects, and the first switch closure, the current supply circuit is respectively via each power supply group
The one-way conduction component of part is the load supplying.
5. device according to claim 4, which is characterized in that the control assembly is used for:
Judge whether to meet power switching condition；
When meeting the power switching condition, controls the first switch and disconnect；
When first switch disconnection reaches first time interval, the electric-controlled switch closure of each Power Supply Assembly is controlled；
When electric-controlled switch closure reaches the second time interval, the first switch closure is controlled, so that described power back
Road is respectively the load supplying via the electric-controlled switch of each Power Supply Assembly.
6. device according to claim 5, which is characterized in that the power switching condition includes following one kind:
The temperature of at least one one-way conduction element reaches temperature threshold；
The time of the main switch closure reaches first time threshold.
7. device according to claim 4, which is characterized in that described device further include:
Self-locking switch circuit is connected in series between the current supply circuit and the power supply circuit of the control assembly, described self-locking
When switching circuit is connected, the current supply circuit is connected with the power supply circuit, so that the current supply circuit is the control assembly
Power supply,
Wherein, the control assembly is used for:
When the main switch disconnects, judge whether to meet outage condition；
It when meeting outage condition, controls the self-locking switch circuit and disconnects, so that the control assembly powers off.
8. device according to claim 7, which is characterized in that the outage condition includes:
The time that the main switch disconnects reaches second time threshold.
9. device according to claim 4, which is characterized in that the control assembly is used for:
When the time of main switch closure reaching first time threshold, controls the first switch and disconnect；
When first switch disconnection reaches first time interval, the electric-controlled switch closure of each Power Supply Assembly is controlled；
When electric-controlled switch closure reaches the second time interval, the first switch closure is controlled, so that described power back
Road is respectively the load supplying via the electric-controlled switch of each Power Supply Assembly.
10. a kind of electric tool characterized by comprising
Power supply unit described in any one of -9 according to claim 1, by the multiple batteries for being installed to the power supply unit
Packet is that the electric tool is powered.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711460368 | 2017-12-28 | ||
| CN201721886334 | 2017-12-28 | ||
| CN2017114603686 | 2017-12-28 | ||
| CN2017218863349 | 2017-12-28 |
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|---|---|
| CN209313464U true CN209313464U (en) | 2019-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822176896.5U Active CN209313464U (en) | 2017-12-28 | 2018-12-24 | Power supply unit and electric tool |
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| Country | Link |
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| CN (1) | CN209313464U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021082884A1 (en) * | 2019-10-28 | 2021-05-06 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN112848969A (en) * | 2019-11-27 | 2021-05-28 | 光阳工业股份有限公司 | Battery parallel control method for electric vehicle |
| WO2021196581A1 (en) * | 2020-03-31 | 2021-10-07 | 苏州宝时得电动工具有限公司 | Control system for electrical control pack |
-
2018
- 2018-12-24 CN CN201822176896.5U patent/CN209313464U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021082884A1 (en) * | 2019-10-28 | 2021-05-06 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN112848969A (en) * | 2019-11-27 | 2021-05-28 | 光阳工业股份有限公司 | Battery parallel control method for electric vehicle |
| WO2021196581A1 (en) * | 2020-03-31 | 2021-10-07 | 苏州宝时得电动工具有限公司 | Control system for electrical control pack |
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