CN207884587U - Load switching circuit, battery component and multi-power system - Google Patents
Load switching circuit, battery component and multi-power system Download PDFInfo
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- CN207884587U CN207884587U CN201721901736.1U CN201721901736U CN207884587U CN 207884587 U CN207884587 U CN 207884587U CN 201721901736 U CN201721901736 U CN 201721901736U CN 207884587 U CN207884587 U CN 207884587U
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Abstract
A kind of load switching circuit of the utility model offer, battery component and multi-power system.The utility model load switching circuit, including：Switch unit and first resistor.Wherein, the input terminal of switch unit is used to connect the anode of battery, and the output end of switch unit is used to connect the input terminal of load, and the Enable Pin of switch unit and the first end of first resistor connect, and the second end of first resistor is connected to ground.The Enable Pin of switch unit is for controlling switching means conductive, so that battery powers to the load.The Enable Pin of switch unit is additionally operable to control switch unit cut-off, charges to reverse battery to prevent load end.The utility model solves the problems, such as in existing load switching circuit diode drop on power rail, and due to switching means conductive resistance very little, the pressure drop brought is far smaller than the pressure drop of diode, can improve the supply voltage that battery is provided to load.
Description
Technical field
The utility model is related to a kind of field of circuit technology more particularly to load switching circuit, battery component and more power supplys
System.
Background technology
Miscellaneous battery is widely used, and battery is as power supply, it will usually connect load switching circuit, load
Switching circuit can open and close power rail, save power consumption, while battery itself being avoided to be rushed by load end reverse current
It hits.Therefore, load switching circuit is that battery brings many advantages.
Fig. 1 is the circuit diagram of existing load switching circuit provided by the utility model, as shown in Figure 1, existing load
Switching circuit would generally introduce a diode on power rail, to realize the requirement of reverse charging limitation and low cost.However,
For the lower battery of minimum operating voltage (such as button cell is powered, and usual lithium manganese button cell power supply is in 2.0V-3.0V)
Speech, the forward conduction voltage of diode can carry out partial pressure effect, can reduce the supply voltage that battery is provided to load, meeting when serious
Load is caused to can not work normally.
Utility model content
A kind of load switching circuit of the utility model offer, battery component and multi-power system are opened with solving existing load
The problem of powered-down routing can reduce supply voltage when the forward conduction voltage of diode causes battery to power to the load.
In a first aspect, the utility model provides a kind of load switching circuit, including：Switch unit and first resistor；
Wherein, the input terminal of the switch unit is used to connect the anode of battery, and the output end of the switch unit is used for
The input terminal of load is connected, the Enable Pin of the switch unit is connect with the first end of the first resistor, the first resistor
Second end be connected to ground；
The Enable Pin of the switch unit is for controlling the switching means conductive, so that the battery is supplied to the load
Electricity；
The Enable Pin of the switch unit is additionally operable to control the switch unit cut-off, anti-to the battery to prevent load end
To charging.
Optionally, the switch unit includes：First switching element and the first diode；
Wherein, the input terminal of the first switching element is used to connect the anode of the battery, the first switching element
Output end be used to connect the input terminal of the load, the Enable Pin of the first switching element and the first of the first resistor
The anode connection at end and first diode, the cathode of first diode are used to connect the input terminal of the load, institute
The Enable Pin for stating first switching element is the Enable Pin of the switch unit；
The Enable Pin of the first switching element is for controlling first switching element conducting, so that the battery is to institute
State load supplying；
The Enable Pin of the first switching element is additionally operable to control the first switching element cut-off, to prevent the load
It holds to the reverse battery and charges；
The Enable Pin of the first switching element is for controlling first diode current flow and cut-off.
Optionally, the first switching element is PMOS.
Optionally, the load switching circuit further includes：Second diode；
Wherein, the anode of second diode is connect with the second end of the first resistor, second diode
The output end of cathode and the switch unit, the cathode of second diode are used to connect the input terminal of the load.
Optionally, the switch unit includes：Second switch element and second resistance；
Wherein, the input terminal of the second switch element is connect with the anode of the battery, the second switch element
Output end is connect with the input terminal of the load, and the Enable Pin of the second switch element connects with the first end of the second resistance
It connects, the second end of the second resistance is connect with the first end of the first resistor, and the second end of the second resistance is described
The Enable Pin of switch unit；
The Enable Pin of the switch unit is for controlling the second switch element conductive, so that the battery is born to described
Carry power supply；
The Enable Pin of the switch unit is additionally operable to control the second switch element cut-off, to prevent the load end to institute
State reverse battery charging.
Optionally, the second switch element is PNP type triode.
Optionally, the switch unit includes：Third switch element, the 4th switch element, 3rd resistor, the 4th resistance with
And the 5th resistance；
Wherein, the Enable Pin of the third switch element respectively with the first end of the 3rd resistor and it is described 4th electricity
The first end of resistance connects, the input terminal of the third switch element respectively with the Enable Pin of the 4th switch element and described the
The first ends of five resistance connects, the output end of the third switch element, the output end of the 4th switch element and described
The second end of 4th resistance is respectively used to connect the cathode of the battery, and the second end of the 5th resistance is for connecting the electricity
The anode in source is connected with the input terminal of the load, and the input terminal of the 4th switch element with described is connect, the third
The second end of resistance is connect with the first end of the first resistor, and the second end of the 3rd resistor is making for the switch unit
It can end；
The Enable Pin of the switch unit is led for controlling the third switch element cut-off, the 4th switch element
It is logical, so that the battery is to the load supplying；
The Enable Pin of the switch unit is additionally operable to control the third switching elements conductive, and the 4th switch element is cut
Only, it charges to the reverse battery to prevent the load end.
Optionally, the second switch element is NPN type triode.
Second aspect, the utility model provide a kind of battery component, including：Battery and as described in above-mentioned first aspect
Load switching circuit.
The third aspect, the utility model provide a kind of multi-power system, including：Multiple electricity as described in above-mentioned second aspect
Pond component, analog-digital converter and controller；
Wherein, the anode of battery is connect with the input terminal of the analog-digital converter respectively in each battery component, the modulus
The output end of converter is connect with the input terminal of the controller, and the output end of the controller and the switch Enable Pin of load connect
It connects；
The controller is used for the supply voltage of more each battery component, to select the supply voltage of the load.
Load switching circuit, battery component and multi-power system provided by the utility model, pass through the input of switch unit
End connects the anode of battery, and the output end of switch unit connects the input terminal of load, the Enable Pin of switch unit and first
The first end of resistance connects, and the second end of first resistor is connected to ground.And the Enable Pin of switch unit can control switch unit
Conducting, so that battery powers to the load.The Enable Pin of switch unit can also control switch unit cut-off, to prevent load end to electricity
Pond reverse charging.The utility model solves the problems, such as in existing load switching circuit diode drop on power rail, due to opening
Unit conducting resistance very little is closed, the pressure drop brought is far smaller than the pressure drop of diode, improves the power supply that battery is provided to load
Voltage prevents load end to charge to reverse battery, can protect battery and extend the service life of battery.
Description of the drawings
Fig. 1 is the circuit diagram of existing load switching circuit provided by the utility model；
Fig. 2 is the structural schematic diagram of load switching circuit provided by the utility model；
Fig. 3 is the circuit diagram one of load switching circuit provided by the utility model；
Fig. 4 is the circuit diagram two of load switching circuit provided by the utility model；
Fig. 5 is the circuit diagram three of load switching circuit provided by the utility model；
Fig. 6 is the circuit diagram four of load switching circuit provided by the utility model；
Fig. 7 is the structural schematic diagram of battery component provided by the utility model；
Fig. 8 is the structural schematic diagram of multi-power system provided by the utility model.
Specific implementation mode
When existing load switch is the circuit that conventional discrete device is built, since the partial pressure of diode acts on so that electricity
Pond provides required voltage without normal load, and load is caused to can not work normally.Existing load switch can also be by integrated chip
It realizes, chip interior need to integrate the circuit structures such as current limliting, logic control and gate driving, but since chip needs to maintain logic control
The functions such as system, the quiescent dissipation of chip is larger, and the cost of chip is higher.Therefore, in order to overcome the above problem, with reference to figure
2, the present embodiment can avoid battery from being influenced by reverse current by the setting of switch unit so that load being capable of normal work
Make.
Fig. 2 is the structural schematic diagram of load switching circuit provided by the utility model, as shown in Fig. 2, the present embodiment is negative
Load switch circuit may include：Switch unit and first resistor.
Wherein, the input terminal of the switch unit is used to connect the anode of battery, and the output end of the switch unit is used for
The input terminal of load is connected, the Enable Pin of the switch element is connect with the first end of the first resistor, the first resistor
Second end be connected to ground.
The Enable Pin of the switch unit is for controlling the switching means conductive, so that the battery is supplied to the load
Electricity.The Enable Pin of the switch element is additionally operable to control the switch unit cut-off, anti-to the battery to prevent the load end
To charging.
Specifically, the Enable Pin of switch unit can control the on or off of switch unit, this implementation in the present embodiment
Example does not limit the specific implementation of switch unit.
When the Enable Pin of switch unit is grounded or is hanging, switching means conductive.Since the input terminal of switch unit is used
In the anode of connection battery, the output end of switch unit is used to connect the input terminal of load, therefore, when the anode connection of battery is opened
The input terminal of unit is closed, when the output end connection of switch unit loads, battery can power to the load, and then realize load just
Often work.
When the Enable Pin of switch unit accesses high level, switch unit cut-off.Since the input terminal of switch unit is used for
The anode of battery is connected, the output end of switch unit is used to connect the input terminal of load, therefore, when the positive connecting valve of battery
The input terminal of unit, when the output end connection of switch unit loads, since switch unit ends, the reversed electricity of load end
Stream can not flow to battery, and load end is prevented to charge to reverse battery, protect battery and extend the service life of battery.
Further, the first end of first resistor and the Enable Pin of switch unit connect, second end and the ground of first resistor
Connection, therefore, when what signal is the Enable Pin of switch unit do not take over, first resistor enables to the Enable Pin of switch unit to be
Low-voltage so that switching means conductive.In the present embodiment when switching means conductive, due to switching means conductive resistance very little, band
The pressure drop come is very small, and the pressure drop of far smaller than diode, just will not cause the waste of the energy content of battery in this way.
Load switching circuit provided in this embodiment connects the anode of battery by the input terminal of switch unit, switch
The output end of unit connects the input terminal of load, and the Enable Pin of switch unit and the first end of first resistor connect, the first electricity
The second end of resistance is connected to ground.And the Enable Pin of switch unit can control switching means conductive, so that battery powers to the load.
The Enable Pin of switch unit can also control switch unit cut-off, charge to reverse battery to prevent load end.The present embodiment solves
It, due to switching means conductive resistance very little, is brought the problem of diode drop on power rail in existing load switching circuit
Pressure drop is far smaller than the pressure drop of diode, improves the supply voltage that battery is provided to load, prevents load end to battery
Reverse charging can protect battery and extend the service life of battery.
Switch unit can there are many realization methods in the present embodiment, on the basis of above-mentioned Fig. 2 embodiments, and combination Fig. 3,
Fig. 4 and Fig. 5 is described in detail the specific implementation of switch unit in the present embodiment using three specific embodiments.
Embodiment one
On the one hand, on the basis of Fig. 2 embodiments, Fig. 3 is that the circuit of load switching circuit provided by the utility model shows
It is intended to one, as shown in figure 3, the switch unit of the present embodiment includes：First switching element and the first diode.
Wherein, the input terminal of the first switching element is used to connect the anode of the battery, the first switching element
Output end be used to connect the input terminal of the load, the Enable Pin of the first switching element respectively with the first resistor
The anode connection of first end and first diode, the cathode of first diode are used to connect the input of the load
End, the second end of the first resistor with described are connect, and the Enable Pin of the first switching element is the switch unit
Enable Pin.
The Enable Pin of the first switching element is for controlling first switching element conducting, so that the battery is to institute
State load supplying.The Enable Pin of the first switching element is additionally operable to control the first switching element cut-off, to prevent described negative
End is carried to charge to the reverse battery.The Enable Pin of the first switching element is for controlling first diode current flow and cutting
Only.
Specifically, the Enable Pin of first switching element can control first switching element on or off in the present embodiment,
The present embodiment does not limit the specific control mode of first switching element.Optionally, when the enabled termination of first switching element
Ground or it is hanging when, first switching element conducting.When the Enable Pin of first switching element accesses high level, first switching element
Cut-off.
When battery connects the input terminal of first switching element, and the output end connection of first switching element loads, first opens
Close the Enable Pin control first switching element conducting of element so that pressure drop of the battery on the power rail of load is less than two poles
The forward conduction voltage of pipe, and the supply voltage of excessive battery will not be consumed, so that battery can normally power to the load.
When battery connects the input terminal of first switching element, and the output end connection of first switching element loads, first opens
The Enable Pin control first switching element cut-off of element is closed, load end charges without normal direction reverse battery at this time, protects battery and prolongs
The service life of long battery.
Further, in this embodiment first switching element may include a variety of, the present embodiment does not limit this.It is optional
Ground, the first switching element are P-channel metal-oxide-semiconductor field-effect tube (positive channel Metal
Oxide Semiconductor, PMOS).For convenience of description, first switching element is shown with PMOS in the present embodiment Fig. 3
Meaning.
Specifically, when first switching element is PMOS, since PMOS itself is there are parasitic diode, this implementation
Example is by the source-drain electrode reversal connection of PMOS, and the Enable Pin of first switching element can be the grid of PMOS in this sample embodiment, and first opens
The input terminal for closing element can be the drain electrode of PMOS, drain and connect for the anode with battery, the output end of first switching element
Can be the source electrode of PMOS, source electrode with the input terminal of load for connecting.And the PMOS of source-drain electrode reversal connection and the both ends of diode
Parallel connection forms a current path.
When the grounded-grid of PMOS or it is hanging when, the drain voltage that the grid voltage of PMOS is 0, PMOS is no better than battery
Supply voltage, PMOS conductings so that parasitic diode short circuit, and the drain voltage of the source voltage of PMOS and PMOS almost phase
It is less than the forward conduction voltage of a diode from the pressure drop between drain-to-source Deng, PMOS, therefore, battery does not have excessively
Loss, can to load normal power supply.
Wherein, in the moment of PMOS conductings, since POMS drain electrodes and source electrode are asymmetric, the grid source threshold value electricity of PMOS
Pressure (Vsd (on)) cannot continue to use old value.Herein, the source-drain voltage of POMS is both greater than the grid voltage of POMS, is conducive to transoid
The molding of layer-P-channel.Meanwhile the supply voltage of battery is generally higher than Vsd (on), therefore charged between the grid source electrode of POMS
Cheng Hou, PMOS can enter diode region, at this point, the Equivalent DC impedance between PMOS source drain electrode is smaller (such as 100m Ω), if electric
Stream mainly flowed through by PMOS raceway grooves, caused pressure drop on power rail it is smaller (such as 100m Ω DC impedances 1A power when only generate
The pressure drop of 0.1V).
When the grid voltage of PMOS is higher than the supply voltage of battery, the drain voltage of PMOS is no better than the power supply of battery
Voltage, PMOS cut-offs, the anode of the anode connection battery of parasitic diode, the input of the cathode connection load of parasitic diode
End can prevent load to charge to reverse battery.
Further, in this embodiment the source-drain electrode reversal connection of PMOS tube, can avoid reverse current from being flowed into battery, and negative
Load switch circuit static electric current is low, while solving the problems, such as the diode drop on power rail, supports larger conducting electric current.Especially
It is suitable for the power managements of an A-battery.
Specifically, the Enable Pin of first switching element is also connected with the anode of the first diode, the one or two pole in the present embodiment
The cathode of pipe is used to connect the input terminal of load.Since the Enable Pin of first switching element has access to different size of level,
Therefore, when first switching element is grounded or is hanging, the first diode can not be connected, and first switching element is connected so that electricity
Pond can charge to load.When first switching element accesses another battery, and the supply voltage of another battery is more than battery
When supply voltage, first switching element cut-off, but make another battery via the Enable Pin of first switching element and the one or two
Pole pipe can charge to load, to which load switching circuit can realize the switching of different batteries, to adapt to the various need of load
It asks.
On the other hand, on the basis of Fig. 2 embodiments, Fig. 4 is the circuit of load switching circuit provided by the utility model
Schematic diagram two, as shown in figure 4, the load switching circuit of the present embodiment further includes：Second diode.Wherein, the two or two pole
The anode of pipe is connect with the second end of the first resistor, the output of the cathode and the switch unit of second diode
End, the cathode of second diode are used to connect the input terminal of the load.
Specifically, when the Enable Pin of switch unit accesses high level, switch unit cut-off therefore, can in the present embodiment
Second diode is connected in parallel between the output end and ground of switch unit, the second diode is capable of release switch unit
The voltage of Enable Pin access so that the second diode can be oad freewheels when switch unit ends, and realize output afterflow protection.
Embodiment two
Fig. 5 is the circuit diagram three of load switching circuit provided by the utility model, as shown in figure 5, the present embodiment
Switch unit includes：Second switch element and second resistance.
Wherein, the input terminal of the second switch element is used to connect the anode of the battery, the second switch element
Output end be used to connect the input terminal of the load, the Enable Pin of the second switch element and the first of the second resistance
End connection, the second end of the second resistance are connect with the first end of the first resistor, and the second end of the second resistance is
The Enable Pin of the switch unit.
The Enable Pin of the switch unit is for controlling the second switch element conductive, so that the battery is born to described
Carry power supply.The Enable Pin of the switch unit is additionally operable to control the second switch element cut-off, to prevent the load end to institute
State reverse battery charging.
Specifically, it is connect with the Enable Pin of second switch element due to second resistance, the enabled termination of switch unit
The voltage entered passes through after second resistance, can generate suitable electric current, be flowed into the Enable Pin of second switch element so that the
Two switching elements conductives or cut-off.
Further, in this embodiment the Enable Pin of switch unit can control the Enable Pin access of second switch element
Electric current so that the Enable Pin of second switch element can control second switch element conductive or cut-off, and the present embodiment pair second is opened
The specific control mode for closing element does not limit.Optionally, when the Enable Pin of switch unit is grounded or is hanging, second switch
The Enable Pin of element controls second switch element conductive.When the Enable Pin of switch unit accesses high level, second switch element
Enable Pin control second switch element cut-off.
Further, when battery connects the input terminal of second switch element, the output end connection load of second switch element
When, the voltage of the Enable Pin access of switch unit makes the Enable Pin of second switch element control second switch element conductive, the
The conducting resistance very little of two switch elements so that pressure drop of the battery on the power rail of load is less than the positive guide of a diode
Be powered pressure, the supply voltage of excessive battery will not be consumed, so that battery can normally power to the load.
When battery connects the input terminal of second switch element, and the output end connection of second switch element loads, switch is single
The voltage of the Enable Pin access of member makes the Enable Pin of second switch element control the cut-off of second switch element, at this time load end
Reverse current can not flow to battery, and then load end charges without normal direction reverse battery, protect battery and extend the service life of battery.
Further, in this embodiment second switch element may include a variety of, the present embodiment does not limit this.It is optional
Ground, the second switch element are PNP type triode.For convenience of description, in the present embodiment Fig. 5 second switch element with PNP
Type triode is illustrated.
Specifically, the Enable Pin of second switch element can be the base stage of PNP type triode, second switch member in the present embodiment
The input terminal of part can be the emitter of PNP type triode, and emitter is used to connect with the anode of battery, second switch element
Output end can be the collector of PNP type triode, and collector with the input terminal of load for connecting.
When the Enable Pin of switch unit is grounded or is hanging, the base voltage of PNP type triode is 0, PNP type triode
Emitter voltage be no better than battery supply voltage, PNP type triode conducting, and the collector voltage of PNP type triode with
The emitter voltage of PNP type triode is almost equal, and pressure drop of the PNP type triode between emitter to collector can be much
Less than the forward conduction voltage of a diode, therefore, battery does not have excessive loss, can be to load normal power supply.
When supply voltage (be such as linked into other positive poles) of the Enable Pin of the switch unit access higher than battery, PNP
The emitter voltage of type triode is no better than the supply voltage of battery, PNP type triode cut-off, and battery can stop supplying to load
Electricity, and load end also charges without normal direction reverse battery.
Embodiment three
Fig. 6 is the circuit diagram four of load switching circuit provided by the utility model, as shown in fig. 6, the present embodiment
Switch unit includes：Third switch element, the 4th switch element, 3rd resistor, the 4th resistance and the 5th resistance.
Wherein, the Enable Pin of the third switch element respectively with the first end of the 3rd resistor and it is described 4th electricity
The first end of resistance connects, the input terminal of the third switch element respectively with the Enable Pin of the 4th switch element and described the
The first ends of five resistance connects, the output end of the third switch element, the output end of the 4th switch element and described
The second end of 4th resistance is respectively used to connect the cathode of the battery, and the second end of the 5th resistance is for connecting the electricity
The anode in source is connected with the input terminal of the load, and the input terminal of the 4th switch element with described is connect, the third
The second end of resistance is connect with the first end of the first resistor, and the second end of the 3rd resistor is making for the switch unit
It can end.
The Enable Pin of the switch unit is led for controlling the third switch element cut-off, the 4th switch element
It is logical, so that the battery is to the load supplying.The Enable Pin of the switch unit is additionally operable to control the third switch element
Conducting, the 4th switch element cut-off, charges to prevent the load end to the reverse battery.
Specifically, it is connect with the Enable Pin of third switch element due to 3rd resistor, the enabled termination of switch unit
The voltage entered passes through after 3rd resistor, can generate suitable electric current, be flowed into the Enable Pin of third switch element so that the
Three switching elements conductives or cut-off.Again since the input terminal of third switch element is connect with the Enable Pin of the 4th switch element, because
This, the on or off of third switch element can change the curent change of the input terminal of third switch element so that the 4th opens
Close the on or off of element.
Further, in this embodiment the Enable Pin of switch unit can control the Enable Pin access of third switch element
Electric current so that the Enable Pin of third switch element can control third switching elements conductive or cut-off, and the present embodiment opens third
The specific control mode for closing element does not limit.In turn, the on or off of third switch element can change third switch member
The electric current of the input terminal of part so that the 4th switching elements conductive or cut-off.Optionally, when the Enable Pin of switch unit ground connection or
When hanging, the Enable Pin control third switch element cut-off of third switch element, the Enable Pin control the 4th of the 4th switch element
Switching elements conductive.When the Enable Pin of switch unit accesses high level, the Enable Pin control third switch of third switch element
The Enable Pin of element conductive, the 4th switch element controls the cut-off of the 4th switch element.
Further, since the cathode of the output end of the 4th switch element and battery connects, anode and the load of battery
Input terminal connects, and the input terminal of the 4th switch element is connected to ground, and therefore, the 4th switch element, battery and load form one
A circuit.
Further, it is connected with input terminal that is loading when the second end of the 5th resistance connects the positive of power supply, and power supply
When cathode connects, the voltage of the Enable Pin access of switch unit passes through 3rd resistor, enables to be flowed into third switch element
Enable Pin current control third switch element cut-off, and the input terminal of third switch element and the 4th switch element enable
End connection can control the 4th switching elements conductive, and the circuit that such 4th switch element, battery and load are formed is connected,
The conducting resistance very little of 4th switch element so that battery does not have pressure drop or pressure drop to be less than one two on the power rail of load
The forward conduction voltage of pole pipe, will not consume the supply voltage of excessive battery, so that battery can normally power to the load.
It is connected with input terminal that is loading when the second end of the 5th resistance connects the positive of power supply, and the cathode connection of power supply
When, the voltage of the Enable Pin access of switch unit passes through 3rd resistor, enables to the Enable Pin for being flowed into third switch element
Current control third switching elements conductive, and the input terminal of third switch element is connect with the Enable Pin of the 4th switch element,
The cut-off of the 4th switch element can be controlled, the loop cutoff that such 4th switch element, battery and load are formed loads at this time
The reverse current at end can not flow to battery, and then load end charges without normal direction reverse battery, protect battery and extend the longevity of battery
Life.
Further, in this embodiment third switch element and the 4th switch element may include a variety of, the present embodiment is to this
It does not limit.Optionally, the third switch element and the 4th switch element are NPN type triode.For convenience of description,
Third switch element and the 4th switch element are all illustrated with NPN type triode in the present embodiment Fig. 6.
Specifically, the Enable Pin of third switch element can be opened for the base stage of the first NPN type triode, third in the present embodiment
The input terminal for closing element can be the collector of the first NPN type triode, and collector is first with the 5th resistance and the 4th switch respectively
The base stage of part connects, and the 5th resistance is also connect with the anode of battery, and the output end of third switch element can be three pole of the first NPN type
The emitter of pipe, emitter with the cathode of battery for connecting.And the 4th the Enable Pin of switch element can be the second NPN type three
The base stage of pole pipe, the input terminal of the 4th switch element can be the collector of the second NPN type triode, and collector is connected to ground,
The output end of 4th switch element can be the emitter of the second NPN type triode, and emitter is used to connect with the cathode of battery,
The anode of battery is connect with the input terminal of load.
When the Enable Pin of switch unit is grounded or is hanging, the base voltage of the first NPN type triode is 0, the first NPN type
The emitter voltage of triode is 0, and the base voltage of the cut-off of the first NPN type triode, the second NPN type triode is equal to battery
Supply voltage passes through the partial pressure of the 5th resistance, and the emitter voltage of the second NPN type triode is 0, and the second NPN type triode is led
Circuit conducting logical, that such second NPN type triode, battery and load are formed, and the second NPN type triode from emitter to
Pressure drop between collector is less than the forward conduction voltage of a diode, and therefore, battery does not have excessive loss, Neng Gouxiang
Load normal power supply.
When supply voltage (be such as linked into other positive poles) of the Enable Pin of the switch unit access higher than battery, first
The base voltage of NPN type triode, which is equal to, to be divided to obtain voltage, the emitter voltage of the first NPN type triode by 3rd resistor
It is 0, the first NPN type triode conducting so that the collector of NPN type triode exports low level, and then the second NPN type triode
Base stage be low level, the transmitting extremely 0 of the second NPN type triode, the second NPN type triode cut-off, such second NPN type three
The loop cutoff that pole pipe, battery and load are formed, battery can stop powering to the load, and load end is also without normal direction reverse battery
Charging.
Fig. 7 is the structural schematic diagram of battery component provided by the utility model, as shown in fig. 7, the battery pack of the present embodiment
Part includes：Battery 11 and load switching circuit 12 as described above.
The battery component of the present embodiment includes load switching circuit 12, can be used for executing the above-mentioned load of the utility model and opens
The technical solution of 12 each embodiment of powered-down road, implementing principle and technical effect are similar, and details are not described herein again.
Fig. 8 is the structural schematic diagram of multi-power system provided by the utility model, as shown in figure 8, the present embodiment is mostly electric
Source system includes：Multiple battery components as described above 10, analog-digital converter 20 and controller 30.
Wherein, the anode of battery is connect with the input terminal of the analog-digital converter 20 respectively in each battery component 10, described
The output end of analog-digital converter 20 is connect with the input terminal of the controller 30, the output end of the controller 30 and opening for load
Close Enable Pin connection.The controller 30 is used for the supply voltage of more each battery component 10, to select the electricity of the load
Source voltage.
Specifically, analog-digital converter 20 is connect with the battery in each battery component 10 in the present embodiment, and controller 30 passes through
With the connection of analog-digital converter 20 so that controller 30 can get the supply voltage of each battery, required further according to load
Supply voltage, the supply voltage of 30 more each battery component 10 of controller, to select the supply voltage of loading demand, then divides
Corresponding instruction is not sent to the switch Enable Pin of load and battery component end so that the battery component for meeting loading demand can
It charges to load.And also it can carry out one of battery pack by digital decoder and multipath simulator chip in the present embodiment
The conducting of part 10 and load end, to determine the supply voltage that can be powered to the load from each battery component 10, to save
The resource for saving controller 30, realizes the automatic switchover of cell channel in each battery component.
The multi-power system of the present embodiment includes multiple battery components 10, and all includes that load is opened in any battery component 10
Powered-down road, can be used for execute each embodiment of the above-mentioned load switching circuit of the utility model technical solution, realization principle and
Technique effect is similar, and details are not described herein again.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should
Understand：It still can be with technical scheme described in the above embodiments is modified, either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacements, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of load switching circuit, which is characterized in that including：Switch unit and first resistor；
Wherein, the input terminal of the switch unit is used to connect the anode of battery, and the output end of the switch unit is for connecting
The input terminal of load, the Enable Pin of the switch unit are connect with the first end of the first resistor, and the of the first resistor
Two ends are connected to ground；
The Enable Pin of the switch unit is for controlling the switching means conductive, so that the battery is to the load supplying；
The Enable Pin of the switch unit is additionally operable to control the switch unit cut-off, is filled to the reverse battery to prevent load end
Electricity.
2. load switching circuit according to claim 1, which is characterized in that the switch unit includes：First switch member
Part and the first diode；
Wherein, the input terminal of the first switching element is used to connect the anode of the battery, the first switching element it is defeated
Outlet is used to connect the input terminal of the load, the first end of the Enable Pin of the first switching element and the first resistor and
The anode connection of first diode, the cathode of first diode are used to connect the input terminal of the load, and described the
The Enable Pin of one switch element is the Enable Pin of the switch unit；
The Enable Pin of the first switching element is for controlling the first switching element conducting, so that the battery is born to described
Carry power supply；
The Enable Pin of the first switching element is additionally operable to control the first switching element cut-off, with prevent the load end to
The reverse battery charging；
The Enable Pin of the first switching element is for controlling first diode current flow and cut-off.
3. load switching circuit according to claim 2, which is characterized in that the first switching element is PMOS.
4. load switching circuit according to claim 1, which is characterized in that the load switching circuit further includes：Second
Diode；
Wherein, the anode of second diode is connect with the second end of the first resistor, the cathode of second diode
With the output end of the switch unit, the cathode of second diode is used to connect the input terminal of the load.
5. load switching circuit according to claim 1, which is characterized in that the switch unit includes：Second switch member
Part and second resistance；
Wherein, the input terminal of the second switch element is connect with the anode of the battery, the output of the second switch element
End is connect with the input terminal of the load, and the Enable Pin of the second switch element is connect with the first end of the second resistance,
The second end of the second resistance is connect with the first end of the first resistor, and the second end of the second resistance is the switch
The Enable Pin of unit；
The Enable Pin of the switch unit is for controlling the second switch element conductive, so that the battery is supplied to the load
Electricity；
The Enable Pin of the switch unit is additionally operable to control the second switch element cut-off, to prevent the load end to the electricity
Pond reverse charging.
6. load switching circuit according to claim 5, which is characterized in that the second switch element is three pole of positive-negative-positive
Pipe.
7. load switching circuit according to claim 1, which is characterized in that the switch unit includes：Third switch member
Part, the 4th switch element, 3rd resistor, the 4th resistance and the 5th resistance；
Wherein, the Enable Pin of the third switch element respectively with the first end of the 3rd resistor and the 4th resistance
First end connects, the input terminal of the third switch element respectively with the Enable Pin of the 4th switch element and the 5th electricity
The first end of resistance connects, the output end of the third switch element, the 4th switch element output end and the described 4th
The second end of resistance is respectively used to connect the cathode of the battery, and the second end of the 5th resistance is for connecting the power supply
The positive input terminal with the load connects, and the input terminal of the 4th switch element with described is connect, the 3rd resistor
Second end connect with the first end of the first resistor, the second end of the 3rd resistor is the enabled of the switch unit
End；
The Enable Pin of the switch unit is ended for controlling the third switch element, the 4th switching elements conductive, with
Make the battery to the load supplying；
The Enable Pin of the switch unit is additionally operable to control the third switching elements conductive, and the 4th switch element ends,
It charges to the reverse battery to prevent the load end.
8. load switching circuit according to claim 7, which is characterized in that the second switch element is three pole of NPN type
Pipe.
9. a kind of battery component, which is characterized in that including：Battery and the load switch electricity as described in claim 1-8 is any
Road.
10. a kind of multi-power system, which is characterized in that including：Multiple battery components as claimed in claim 9, analog-to-digital conversion
Device and controller；
Wherein, the anode of battery is connect with the input terminal of the analog-digital converter respectively in each battery component, the analog-to-digital conversion
The output end of device is connect with the input terminal of the controller, and the output end of the controller and the switch Enable Pin of load connect；
The controller is used for the supply voltage of more each battery component, to select the supply voltage of the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901736.1U CN207884587U (en) | 2017-12-29 | 2017-12-29 | Load switching circuit, battery component and multi-power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901736.1U CN207884587U (en) | 2017-12-29 | 2017-12-29 | Load switching circuit, battery component and multi-power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207884587U true CN207884587U (en) | 2018-09-18 |
Family
ID=63503502
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721901736.1U Active CN207884587U (en) | 2017-12-29 | 2017-12-29 | Load switching circuit, battery component and multi-power system |
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| Country | Link |
|---|---|
| CN (1) | CN207884587U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968641A (en) * | 2017-12-29 | 2018-04-27 | 生迪智慧科技有限公司 | Load switching circuit, battery component and multi-power system |
-
2017
- 2017-12-29 CN CN201721901736.1U patent/CN207884587U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968641A (en) * | 2017-12-29 | 2018-04-27 | 生迪智慧科技有限公司 | Load switching circuit, battery component and multi-power system |
| WO2019129280A1 (en) * | 2017-12-29 | 2019-07-04 | Sengled Co., Ltd. | Load switch circuit, battery assembly, and multi-power system |
| CN107968641B (en) * | 2017-12-29 | 2020-12-01 | 生迪智慧科技有限公司 | Load switch circuit, battery pack and multi-power-supply system |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Load switch circuit, battery module and multiple power supply system Effective date of registration: 20230227 Granted publication date: 20180918 Pledgee: Tongxiang Yunbei Investment Construction Co.,Ltd. Pledgor: SENGLED Co.,Ltd. Registration number: Y2023980033490 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |