CN107968641A - Load switching circuit, battery component and multi-power system - Google Patents
Load switching circuit, battery component and multi-power system Download PDFInfo
- Publication number
- CN107968641A CN107968641A CN201711480252.9A CN201711480252A CN107968641A CN 107968641 A CN107968641 A CN 107968641A CN 201711480252 A CN201711480252 A CN 201711480252A CN 107968641 A CN107968641 A CN 107968641A
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- China
- Prior art keywords
- switch element
- load
- battery
- enable pin
- input terminal
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/06—Modifications for ensuring a fully conducting state
- H03K17/063—Modifications for ensuring a fully conducting state in field-effect transistor switches
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/06—Modifications for ensuring a fully conducting state
- H03K2017/066—Maximizing the OFF-resistance instead of minimizing the ON-resistance
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0054—Gating switches, e.g. pass gates
Abstract
The present invention provides a kind of load switching circuit, battery component and multi-power system.Load switching circuit of the present invention, including：Switch element and first resistor.Wherein, the input terminal of switch element is used for the cathode for connecting battery, and the output terminal of switch element is used for the input terminal for connecting load, and the Enable Pin of switch element and the first end of first resistor connect, and the second end of first resistor is connected to ground.The Enable Pin of switch element is turned on for controlling switch unit, so that battery powers to the load.The Enable Pin of switch element is additionally operable to the cut-off of controlling switch unit, charges to prevent load end to reverse battery.The present invention 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, it is possible to increase the supply voltage that battery is provided to load.
Description
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of load switching circuit, battery component and multi-power system.
Background technology
Miscellaneous battery is widely used, and battery is as power supply, it will usually connects load switching circuit, it is loaded
On-off circuit can open and close power rail, save power consumption, while avoid battery itself from being rushed be subject to load end reverse current
Hit.Therefore, load switching circuit brings many advantages for battery.
Fig. 1 is the circuit diagram of existing load switching circuit provided by the invention, as shown in Figure 1, existing load switch
Circuit would generally introduce a diode on power rail, to realize reverse charging limitation and the requirement of low cost.However, for
For the relatively low 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), two
The forward conduction voltage of pole pipe can carry out partial pressure effect, can reduce the supply voltage that battery is provided to load, can cause when serious
Load can not work normally.
The content of the invention
The present invention provides a kind of load switching circuit, battery component and multi-power system, to solve existing load switch electricity
It route the problem of reducing supply voltage when the forward conduction voltage of diode causes battery to power to the load.
In a first aspect, the present invention provides a kind of load switching circuit, including：Switch element and first resistor；
Wherein, the input terminal of the switch element is used for the cathode for connecting battery, and the output terminal of the switch element is used for
The input terminal of load is connected, the Enable Pin of the switch element is connected with the first end of the first resistor, the first resistor
Second end be connected to ground；
The Enable Pin of the switch element is used to control 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 element to end, anti-to the battery to prevent load end
To charging.
Alternatively, the switch element includes：First switching element and the first diode；
Wherein, the input terminal of the first switching element is used for the cathode for connecting the battery, the first switching element
Output terminal 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
End is connected with the cathode of first diode, and the anode of first diode is used for the input terminal for connecting the load, institute
The Enable Pin for stating first switching element is the Enable Pin of the switch element；
The Enable Pin of the first switching element is used to control the first switching element to turn on, 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 to end, to prevent the load
Hold to the reverse battery and charge；
The Enable Pin of the first switching element is used to control first diode current flow and cut-off.
Alternatively, the first switching element is PMOS.
Alternatively, the load switching circuit further includes：Second diode；
Wherein, the cathode of second diode is connected with the second end of the first resistor, second diode
The output terminal of anode and the switch element, the anode of second diode are used for the input terminal for connecting the load.
Alternatively, the switch element includes：Second switch element and second resistance；
Wherein, the input terminal of the second switch element is connected with the cathode of the battery, the second switch element
Output terminal is connected 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
Connect, the second end of the second resistance is connected with the first end of the first resistor, and the second end of the second resistance is described
The Enable Pin of switch element；
The Enable Pin of the switch element is used to control the second switch element conductive, so that the battery is born to described
Carry power supply；
The Enable Pin of the switch element is additionally operable to control the second switch element to end, to prevent the load end to institute
State reverse battery charging.
Alternatively, the second switch element is PNP type triode.
Alternatively, the switch element includes：3rd switch element, the 4th switch element, 3rd resistor, the 4th resistance with
And the 5th resistance；
Wherein, the Enable Pin of the 3rd switch element respectively with the first end of the 3rd resistor and the 4th electricity
The first end connection of resistance, the input terminal of the 3rd switch element respectively with the Enable Pin of the 4th switch element and described the
The first end connection of five resistance, the output terminal of the 3rd switch element, the output terminal of the 4th switch element and described
The second end of 4th resistance is respectively used to connect the anode of the battery, and the second end of the 5th resistance is used to connect the electricity
The cathode in source is connected with the input terminal of the load, and the input terminal of the 4th switch element with described is connected, and the described 3rd
The second end of resistance is connected with the first end of the first resistor, and the second end of the 3rd resistor makes for the switch element
Can end；
The Enable Pin of the switch element is used to control the 3rd switch element to end, and the 4th switch element is led
It is logical, so that the battery is to the load supplying；
The Enable Pin of the switch element is additionally operable to control the 3rd switching elements conductive, and the 4th switch element is cut
Only, charge to prevent the load end to the reverse battery.
Alternatively, the second switch element is NPN type triode.
Second aspect, the present invention provide a kind of battery component, including：Battery and the load as described in above-mentioned first aspect
On-off circuit.
The third aspect, the present invention provide a kind of multi-power system, including：Multiple battery packs as described in above-mentioned second aspect
Part, analog-digital converter and controller；
Wherein, input terminal of the cathode of battery respectively with the analog-digital converter is connected in each battery component, the modulus
The output terminal of converter is connected with the input terminal of the controller, and the output terminal of the controller connects with 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.
Load switching circuit, battery component and multi-power system provided by the invention, by the input terminal of switch element come
Connect the cathode of battery, the output terminal of switch element connects the input terminal of load, the Enable Pin and first resistor of switch element
First end connection, the second end of first resistor is connected to ground.And the Enable Pin of switch element can controlling switch unit conducting,
So that battery powers to the load.The Enable Pin of switch element can also controlling switch unit cut-off, it is anti-to battery to prevent load end
To charging.The present invention solves the problems, such as in existing load switching circuit diode drop on power rail, since switch element is led
Be powered resistance very little, and the pressure drop brought is far smaller than the pressure drop of diode, improves the supply voltage that battery is provided to load, also anti-
Load end is stopped to charge to reverse battery, battery can be protected and extend the service life of battery.
Brief description of the drawings
Fig. 1 is the circuit diagram of existing load switching circuit provided by the invention；
Fig. 2 is the structure diagram of load switching circuit provided by the invention；
Fig. 3 is the circuit diagram one of load switching circuit provided by the invention；
Fig. 4 is the circuit diagram two of load switching circuit provided by the invention；
Fig. 5 is the circuit diagram three of load switching circuit provided by the invention；
Fig. 6 is the circuit diagram four of load switching circuit provided by the invention；
Fig. 7 is the structure diagram of battery component provided by the invention；
Fig. 8 is the structure diagram of multi-power system provided by the invention.
Embodiment
When the circuit that existing load switch is built for conventional discrete device, since the partial pressure of diode acts on so that electricity
Pond provides required voltage without normal load, and causes load not work normally.Existing load switch can also be by integrated chip
To realize, chip internal need to integrate the circuit structures such as current limliting, logic control and raster data model, 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 be subject to reverse current by the setting of switch element so that load being capable of normal work
Make.
Fig. 2 is the structure diagram of load switching circuit provided by the invention, as shown in Fig. 2, the load of the present embodiment is opened
Powered-down road can include：Switch element and first resistor.
Wherein, the input terminal of the switch element is used for the cathode for connecting battery, and the output terminal of the switch element is used for
The input terminal of load is connected, the Enable Pin of the switch element is connected with the first end of the first resistor, the first resistor
Second end be connected to ground.
The Enable Pin of the switch element is used to control 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 element to end, anti-to the battery to prevent the load end
To charging.
Specifically, the Enable Pin of switch element is capable of the on or off of controlling switch unit, this implementation in the present embodiment
Example does not limit the specific implementation of switch element.
When the Enable Pin of switch element is grounded or is hanging, switching means conductive.Since the input terminal of switch element is used
In the cathode of connection battery, the output terminal of switch element is used for the input terminal for connecting load, therefore, when the cathode connection of battery is opened
The input terminal of unit is closed, when the output terminal connection of switch element loads, battery can power to the load, and then realize load just
Often work.
When the Enable Pin of switch element accesses high level, switch element cut-off.Since the input terminal of switch element is used for
The cathode of battery is connected, the output terminal of switch element is used for the input terminal for connecting load, therefore, when the cathode connecting valve of battery
The input terminal of unit, when the output terminal connection of switch element loads, since switch element ends, the reverse electricity of load end
Stream can not flow to battery, prevent load end 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 element connect, second end and the ground of first resistor
Connection, therefore, when what signal is the Enable Pin of switch element do not take over, first resistor enables to the Enable Pin of switch element to be
Low-voltage so that switching means conductive.In the present embodiment during switching means conductive, due to switching means conductive resistance very little, band
The pressure drop come is very small, and the far smaller than pressure drop of diode, just will not so cause the waste of the energy content of battery.
Load switching circuit provided in this embodiment, the cathode of battery is connected by the input terminal of switch element, switch
The output terminal of unit connects the input terminal of load, and the Enable Pin of switch element 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 element can controlling switch unit conducting so that battery powers to the load.
The Enable Pin of switch element can also controlling switch unit cut-off, to prevent load end to reverse battery charge.The present embodiment solves
, due to switching means conductive resistance very little, 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 element can have a variety of implementations 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 element in the present embodiment using three specific embodiments.
Embodiment one
On the one hand, on the basis of Fig. 2 embodiments, Fig. 3 is the circuit diagram of load switching circuit provided by the invention
One, as shown in figure 3, the switch element of the present embodiment includes：First switching element and the first diode.
Wherein, the input terminal of the first switching element is used for the cathode for connecting the battery, the first switching element
Output terminal be used to connecting the input terminal of the load, the Enable Pin of the first switching element respectively with the first resistor
First end is connected with the cathode of first diode, and the anode of first diode is used for the input for connecting the load
End, the second end of the first resistor with described are connected, and the Enable Pin of the first switching element is the switch element
Enable Pin.
The Enable Pin of the first switching element is used to control the first switching element to turn on, 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 to end, to prevent described negative
End is carried to charge to the reverse battery.The Enable Pin of the first switching element is used to control first diode current flow and cuts
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.Alternatively, 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 the input terminal of battery connection first switching element, the output terminal connection load of first switching element, first opens
Close the Enable Pin control first switching element conducting of element so that battery is less than two poles to the pressure drop on the power rail of load
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 the input terminal of battery connection first switching element, the output terminal connection load of first switching element, 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, first switching element may include a variety of in the present embodiment, and 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 is in itself 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, it, which drains, is used to be connected with the cathode of battery, the output terminal of first switching element
Can be the source electrode of PMOS, its source electrode is used to be connected with the input terminal of load.And the PMOS of source-drain electrode reversal connection and the both ends of diode
Parallel connection, forms a current path.
When PMOS grounded-grid or it is hanging when, the grid voltage of PMOS is that the drain voltage of 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, the moment turned in PMOS, 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 shaping of layer-P-channel.Meanwhile the supply voltage of battery is generally higher than Vsd (on), therefore charge between the grid source electrode of POMS
Cheng Hou, PMOS can enter diode region, and at this time, 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 produce
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 cathode of the cathode connection battery of parasitic diode, the input of the anode connection load of parasitic diode
End, can prevent load to charge to reverse battery.
Further, in the present embodiment PMOS tube source-drain electrode reversal connection, reverse current can be avoided to be flowed into battery, and negative
Load switch circuit static electric current is low, while solves the problems, such as the diode drop on power rail, supports larger conducting electric current.Especially
It is suitable for the power management of an A-battery.
Specifically, the Enable Pin of first switching element is also connected with the cathode of the first diode, the one or two pole in the present embodiment
The anode of pipe is used for the input terminal for connecting 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 turn on, and first switching element turns on 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
During supply voltage, first switching element cut-off, but cause another battery via the Enable Pin of first switching element and the one or two
Pole pipe can charge to load, so that load switching circuit can realize the switching of different batteries, to adapt to the various need of load
Ask.
On the other hand, on the basis of Fig. 2 embodiments, Fig. 4 is that the circuit of load switching circuit provided by the invention is illustrated
Figure two, as shown in figure 4, the load switching circuit of the present embodiment further includes：Second diode.Wherein, second diode
Cathode is connected with the second end of the first resistor, the anode of second diode and the output terminal of the switch element, institute
The anode for stating the second diode is used for the input terminal for connecting the load.
Specifically, when the Enable Pin of switch element accesses high level, switch element cut-off therefore, can in the present embodiment
Second diode is connected in parallel between the output terminal and ground of switch element, 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 element ends, and realize output afterflow protection.
Embodiment two
Fig. 5 is the circuit diagram three of load switching circuit provided by the invention, as shown in figure 5, the switch of the present embodiment
Unit includes：Second switch element and second resistance.
Wherein, the input terminal of the second switch element is used for the cathode for connecting the battery, the second switch element
Output terminal 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 connected with the first end of the first resistor, and the second end of the second resistance is
The Enable Pin of the switch element.
The Enable Pin of the switch element is used to control the second switch element conductive, so that the battery is born to described
Carry power supply.The Enable Pin of the switch element is additionally operable to control the second switch element to end, to prevent the load end to institute
State reverse battery charging.
Specifically, since second resistance is connected with the Enable Pin of second switch element, the enabled termination of switch element
The voltage entered passes through after second resistance, can produce suitable electric current, be flowed into the Enable Pin of second switch element so that the
Two switching elements conductives or cut-off.
Further, the Enable Pin of switch element can control what the Enable Pin of second switch element accessed in the present embodiment
Electric current so that the Enable Pin of second switch element can control second switch element conductive or cut-off, and the present embodiment is opened second
The specific control mode for closing element does not limit.Alternatively, when the Enable Pin of switch element is grounded or is hanging, second switch
The Enable Pin control second switch element conductive of element.When the Enable Pin of switch element accesses high level, second switch element
Enable Pin control second switch element cut-off.
Further, when the input terminal of battery connection second switch element, the output terminal connection load of second switch element
When, the voltage of the Enable Pin access of switch element causes the Enable Pin of second switch element to control second switch element conductive, the
The conducting resistance very little of two switch elements so that battery is less than the positive guide of a diode to the pressure drop on the power rail of load
Be powered pressure, the supply voltage of excessive battery will not be consumed, so that battery can normally power to the load.
When the input terminal of battery connection second switch element, the output terminal connection load of second switch element, switch is single
The voltage of the Enable Pin access of member causes the Enable Pin of second switch element to 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, second switch element may include a variety of in the present embodiment, and 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 in the present embodiment, and second switch is first
The input terminal of part can be the emitter of PNP type triode, its emitter is used to be connected with the cathode of battery, second switch element
Output terminal can be the collector of PNP type triode, its collector is used to be connected with the input terminal of load.
When the Enable Pin of switch element 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 the Enable Pin access of switch element is higher than supply voltage (being such as linked into other positive poles) of 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 invention, as shown in fig. 6, the switch of the present embodiment
Unit includes：3rd switch element, the 4th switch element, 3rd resistor, the 4th resistance and the 5th resistance.
Wherein, the Enable Pin of the 3rd switch element respectively with the first end of the 3rd resistor and the 4th electricity
The first end connection of resistance, the input terminal of the 3rd switch element respectively with the Enable Pin of the 4th switch element and described the
The first end connection of five resistance, the output terminal of the 3rd switch element, the output terminal of the 4th switch element and described
The second end of 4th resistance is respectively used to connect the anode of the battery, and the second end of the 5th resistance is used to connect the electricity
The cathode in source is connected with the input terminal of the load, and the input terminal of the 4th switch element with described is connected, and the described 3rd
The second end of resistance is connected with the first end of the first resistor, and the second end of the 3rd resistor makes for the switch element
Can end.
The Enable Pin of the switch element is used to control the 3rd switch element to end, and the 4th switch element is led
It is logical, so that the battery is to the load supplying.The Enable Pin of the switch element is additionally operable to control the 3rd switch element
Conducting, the 4th switch element cut-off, charges to prevent the load end to the reverse battery.
Specifically, since 3rd resistor is connected with the Enable Pin of the 3rd switch element, the enabled termination of switch element
The voltage entered passes through after 3rd resistor, can produce suitable electric current, be flowed into the Enable Pin of the 3rd switch element so that the
Three switching elements conductives or cut-off.Again since the input terminal of the 3rd switch element is connected with the Enable Pin of the 4th switch element, because
This, the on or off of the 3rd switch element can change the curent change of the input terminal of the 3rd switch element so that the 4th opens
Close the on or off of element.
Further, the Enable Pin of switch element can control what the Enable Pin of the 3rd switch element accessed in the present embodiment
Electric current so that the Enable Pin of the 3rd switch element can control the 3rd switching elements conductive or cut-off, and the present embodiment is opened the 3rd
The specific control mode for closing element does not limit.And then the 3rd switch element on or off can change the 3rd switch member
The electric current of the input terminal of part so that the 4th switching elements conductive or cut-off.Alternatively, when switch element Enable Pin ground connection or
When hanging, the Enable Pin of the 3rd switch element controls the cut-off of the 3rd switch element, the Enable Pin control the 4th of the 4th switch element
Switching elements conductive.When the Enable Pin of switch element accesses high level, the 3rd switch of Enable Pin control of the 3rd switch element
Element conductive, the Enable Pin of the 4th switch element control the cut-off of the 4th switch element.
Further, since the output terminal of the 4th switch element and the anode of battery connect, cathode 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, the cathode that power supply is connected when the second end of the 5th resistance is connected with the input terminal of load, and power supply
When anode connects, the voltage of the Enable Pin access of switch element passes through 3rd resistor, enables to be flowed into the 3rd switch element
Enable Pin the 3rd switch element of current control cut-off, and the input terminal of the 3rd 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 turns on,
The conducting resistance very little of 4th switch element so that battery is less than one two to not having pressure drop or pressure drop 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.
The cathode that power supply is connected when the second end of the 5th resistance is connected with the input terminal of load, and the anode connection of power supply
When, the voltage of the Enable Pin access of switch element passes through 3rd resistor, enables to be flowed into the Enable Pin of the 3rd switch element
The 3rd switching elements conductive of current control, and the input terminal of the 3rd switch element is connected with the Enable Pin of the 4th switch element,
The 4th switch element can be controlled to end, 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, the 3rd switch element and the 4th switch element may include a variety of in the present embodiment, and the present embodiment is to this
Do not limit.Alternatively, the 3rd switch element and the 4th switch element are NPN type triode.For convenience of description,
The 3rd 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 the 3rd switch element can be the base stage of the first NPN type triode in the present embodiment, and the 3rd opens
The input terminal for closing element can be the collector of the first NPN type triode, its collector is first with the 5th resistance and the 4th switch respectively
The base stage connection of part, the 5th resistance are also connected with the cathode of battery, and the output terminal of the 3rd switch element can be three pole of the first NPN type
The emitter of pipe, its emitter are used to be connected with the anode of battery.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, its collector is connected to ground,
The output terminal of 4th switch element can be the emitter of the second NPN type triode, its emitter is used to be connected with the anode of battery,
The cathode of battery is connected with the input terminal loaded.
When the Enable Pin of switch element 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 first NPN type triode cut-off, the base voltage of 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 the Enable Pin access of switch element is higher than supply voltage (being such as linked into other positive poles) of battery, first
The base voltage of NPN type triode is equal to obtains voltage, the emitter voltage of the first NPN type triode by 3rd resistor partial pressure
For 0, the first NPN type triode conducting so that the collector output low level of NPN type triode, and then the second NPN type triode
Base stage be low level, the transmitting extremely 0 of the second NPN type triode, the cut-off of the second NPN type triode, 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 structure diagram of battery component provided by the invention, as shown in fig. 7, the battery component bag of the present embodiment
Include：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 performing the above-mentioned load switch electricity of the present invention
The technical solution of 12 each embodiment of road, its implementing principle and technical effect is similar, and details are not described herein again.
Fig. 8 is the structure diagram of multi-power system provided by the invention, as shown in figure 8, more power supply systems of the present embodiment
System includes：Multiple battery component 10, analog-digital converter 20 and controllers 30 as described above.
Wherein, input terminal of the cathode of battery respectively with the analog-digital converter 20 is connected in each battery component 10, described
The output terminal of analog-digital converter 20 is connected with the input terminal of the controller 30, the output terminal 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 connected 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 more each battery component 10 of controller 30, so as to select the supply voltage of loading demand, then divides
Switch Enable Pin and battery component end not to load send corresponding instruction so that meet that the battery component of loading demand can
Charge to load.And also one of battery pack can be carried out by digital decoder and multipath simulator chip in the present embodiment
The conducting of part 10 and load end, so as to the supply voltage for determining to power to the load from each battery component 10, so as to save
The resource of controller 30 is saved, 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 is all opened in any battery component 10 including load
Powered-down road, can be used for the technical solution for performing the above-mentioned each embodiment of load switching circuit of the present invention, its realization principle and technology
Effect is similar, and details are not described herein again.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution described in foregoing embodiments, either to which part or all technical characteristic into
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
- A kind of 1. load switching circuit, it is characterised in that including：Switch element and first resistor；Wherein, the input terminal of the switch element is used for the cathode for connecting battery, and the output terminal of the switch element is used to connect The input terminal of load, the Enable Pin of the switch element are connected 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 element is used to control the switching means conductive, so that the battery is to the load supplying；The Enable Pin of the switch element is additionally operable to control the switch element to end, and is filled to prevent load end to the reverse battery Electricity.
- 2. load switching circuit according to claim 1, it is characterised in that the switch element includes：First switch member Part and the first diode；Wherein, the input terminal of the first switching element is used to connecting the cathode of the battery, the first switching element it is defeated Outlet is used to connecting the input terminal of the load, the first end of the Enable Pin of the first switching element and the first resistor and The cathode connection of first diode, the anode of first diode are used for the input terminal for connecting the load, and described the The Enable Pin of one switch element is the Enable Pin of the switch element；The Enable Pin of the first switching element is used to control the first switching element to turn on, 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 to end, with prevent the load end to The reverse battery charging；The Enable Pin of the first switching element is used to control first diode current flow and cut-off.
- 3. load switching circuit according to claim 2, it is characterised in that the first switching element is PMOS.
- 4. load switching circuit according to claim 1, it is characterised in that the load switching circuit further includes：Second Diode；Wherein, the cathode of second diode is connected with the second end of the first resistor, the anode of second diode With the output terminal of the switch element, the anode of second diode is used for the input terminal for connecting the load.
- 5. load switching circuit according to claim 1, it is characterised in that the switch element includes：Second switch member Part and second resistance；Wherein, the input terminal of the second switch element is connected with the cathode of the battery, the output of the second switch element End is connected with the input terminal of the load, and the Enable Pin of the second switch element is connected with the first end of the second resistance, The second end of the second resistance is connected 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 element is used to control the second switch element conductive, so that the battery is supplied to the load Electricity；The Enable Pin of the switch element is additionally operable to control the second switch element to end, to prevent the load end to the electricity Pond reverse charging.
- 6. load switching circuit according to claim 5, it is characterised in that the second switch element is three pole of positive-negative-positive Pipe.
- 7. load switching circuit according to claim 1, it is characterised in that the switch element includes：3rd switch member Part, the 4th switch element, 3rd resistor, the 4th resistance and the 5th resistance；Wherein, the Enable Pin of the 3rd switch element respectively with the first end of the 3rd resistor and the 4th resistance First end connects, the input terminal of the 3rd switch element Enable Pin with the 4th switch element and the 5th electricity respectively The first end connection of resistance, output terminal, the output terminal and the described 4th of the 4th switch element of the 3rd switch element The second end of resistance is respectively used to connect the anode of the battery, and the second end of the 5th resistance is used to connect the power supply Cathode is connected with the input terminal of the load, and the input terminal of the 4th switch element with described is connected, the 3rd resistor Second end be connected with the first end of the first resistor, the second end of the 3rd resistor is the enabled of the switch element End；The Enable Pin of the switch element is used to control the 3rd switch element to end, the 4th switching elements conductive, with Make the battery to the load supplying；The Enable Pin of the switch element is additionally operable to control the 3rd switching elements conductive, and the 4th switch element ends, Charge to prevent the load end to the reverse battery.
- 8. load switching circuit according to claim 7, it is characterised in that the second switch element is three pole of NPN type Pipe.
- A kind of 9. battery component, it is characterised in that including：Battery and the load switch electricity as described in claim 1-8 is any Road.
- A kind of 10. multi-power system, it is characterised in that including：Multiple battery component, analog-to-digital conversions as claimed in claim 9 Device and controller；Wherein, input terminal of the cathode of battery respectively with the analog-digital converter is connected in each battery component, the analog-to-digital conversion The output terminal of device is connected with the input terminal of the controller, and the output terminal of the controller is connected with the switch Enable Pin loaded；The controller is used for the supply voltage of more each battery component, to select the supply voltage of the load.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480252.9A CN107968641B (en) | 2017-12-29 | 2017-12-29 | Load switch circuit, battery pack and multi-power-supply system |
| PCT/CN2018/125654 WO2019129280A1 (en) | 2017-12-29 | 2018-12-29 | Load switch circuit, battery assembly, and multi-power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480252.9A CN107968641B (en) | 2017-12-29 | 2017-12-29 | Load switch circuit, battery pack and multi-power-supply system |
Publications (2)
| Publication Number | Publication Date |
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| CN107968641A true CN107968641A (en) | 2018-04-27 |
| CN107968641B CN107968641B (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711480252.9A Active CN107968641B (en) | 2017-12-29 | 2017-12-29 | Load switch circuit, battery pack and multi-power-supply system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107968641B (en) |
| WO (1) | WO2019129280A1 (en) |
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| WO2019129280A1 (en) * | 2017-12-29 | 2019-07-04 | Sengled Co., Ltd. | Load switch circuit, battery assembly, and multi-power system |
| CN111769829A (en) * | 2020-07-22 | 2020-10-13 | 上海客益电子有限公司 | Signal conversion circuit supporting positive and negative connection |
| CN112162125A (en) * | 2020-09-11 | 2021-01-01 | 东莞市明信技术有限公司 | Method for realizing simulation battery |
| WO2023102885A1 (en) * | 2021-12-10 | 2023-06-15 | 深圳市华思旭科技有限公司 | Circuit structure and start-up power supply apparatus |
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| 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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| US20020141124A1 (en) * | 2001-04-02 | 2002-10-03 | Masayasu Ito | Protection device |
| CN101373965A (en) * | 2008-10-21 | 2009-02-25 | 北京星网锐捷网络技术有限公司 | Switching circuit for power supply switch |
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| WO2019129280A1 (en) * | 2017-12-29 | 2019-07-04 | Sengled Co., Ltd. | Load switch circuit, battery assembly, and multi-power system |
| CN111769829A (en) * | 2020-07-22 | 2020-10-13 | 上海客益电子有限公司 | Signal conversion circuit supporting positive and negative connection |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107968641B (en) | 2020-12-01 |
| WO2019129280A1 (en) | 2019-07-04 |
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Denomination of invention: Load switch circuit, battery module and multiple power supply system Effective date of registration: 20230227 Granted publication date: 20201201 Pledgee: Tongxiang Yunbei Investment Construction Co.,Ltd. Pledgor: SENGLED Co.,Ltd. Registration number: Y2023980033490 |