CN209593069U - Management of charging and discharging circuit and charger - Google Patents
Management of charging and discharging circuit and charger Download PDFInfo
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- CN209593069U CN209593069U CN201920653798.8U CN201920653798U CN209593069U CN 209593069 U CN209593069 U CN 209593069U CN 201920653798 U CN201920653798 U CN 201920653798U CN 209593069 U CN209593069 U CN 209593069U
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Abstract
The application provides a kind of management of charging and discharging circuit and charger, it is related to charging technique field, it include: switching circuit, power resistor, charging circuit and discharge circuit, switching circuit is electrically connected with external power supply, the first end of power resistor is electrically connected with one end of switching circuit, one end of charging circuit, discharge circuit, and the second end of power resistor is electrically connected with the other end of battery, the other end of charging circuit, discharge circuit；When the voltage of first end is greater than the voltage of second end, charging circuit conducting, and discharge circuit disconnects, battery is in charged state；When the voltage of first end is less than the voltage of second end, charging circuit is disconnected, and discharging circuit conduction, battery are in discharge condition.There can be the charge and discharge process of control battery, improve the service life of battery.
Description
Technical field
This application involves charging technique fields, in particular to a kind of management of charging and discharging circuit and charger.
Background technique
Lithium battery due to its long service life, capacity is big and the velocity of discharge is fast the advantages that, be widely used in mobile phone,
The multiple fields such as video camera, laptop, electric bicycle.When lithium battery is charged, if excessively filled to lithium battery
Electricity will lead to the damage of lithium battery, influence the service life of lithium battery.
Summary of the invention
The purpose of the application is, in view of the deficiency of the prior art, provides a kind of management of charging and discharging circuit and fills
Electric appliance prevents from overcharging the service life for influencing battery to control the charging process of battery.
To achieve the above object, the embodiment of the present application the technical solution adopted is as follows:
In a first aspect, the utility model embodiment provides a kind of management of charging and discharging circuit, comprising: include: switching circuit,
Power resistor, charging circuit and discharge circuit, the switching circuit are electrically connected with external power supply, the first end of the power resistor
It is electrically connected with one end of the switching circuit, one end of charging circuit, discharge circuit, the second end and electricity of the power resistor
Pond, the other end of charging circuit, discharge circuit the other end be electrically connected；When the voltage of the first end is greater than the second end
Voltage when, charging circuit conducting, and the discharge circuit disconnects, the battery is in charged state；When described first
When the difference of the voltage at end and the voltage of the second end is less than preset value, the charging circuit is disconnected, and locating battery stopping is filled
Electricity；When the voltage of the first end is less than the voltage of the second end, the charging circuit is disconnected, and the discharge circuit is led
Logical, the battery is in discharge condition.
Optionally, the switching circuit includes power switch, the first contact of the power switch and the external power supply
Electrical connection, the second contact of the power switch are electrically connected with the first end of the power resistor, the control of the power switch
End is electrically connected with the other end of one end of the discharge circuit and the charging circuit.
Optionally, the power switch is the first field-effect tube, the source electrode and the external electrical of first field-effect tube
Source electrical connection, the first of one end and the power resistor that the drain electrode of first field-effect tube is electrically connected with the discharge circuit
End electrical connection, the gate pole of first field-effect tube and the other end of one end of the discharge circuit and the charging circuit are electric
Connection；When first end voltage is greater than second end voltage, charging circuit conducting, the discharge circuit is disconnected, and electric current is from institute
The source electrode flow direction drain electrode for stating the first field-effect tube, when the first end voltage is less than the second end voltage, the charging electricity
Road disconnects, and the discharging circuit conduction, electric current flows to source electrode from the drain electrode of first field-effect tube.
Optionally, the discharge circuit includes the second field-effect tube and the first comparison circuit, second field-effect tube
Drain electrode is electrically connected to the second contact of the power switch by current-limiting resistance, the gate pole of second field-effect tube and described the
The electrical connection of one comparison circuit, the source electrode ground connection of second field-effect tube, first comparison circuit and the power resistor
First end and second end are electrically connected.
Optionally, first comparison circuit includes first comparator and the first bleeder circuit, the first comparator
Power end is electrically connected with the first end of the power resistor, and the of the positive input terminal of the first comparator and the power resistor
The electrical connection of two ends, the negative input end of the first comparator are electrically connected with first bleeder circuit, the first comparator
Output end is electrically connected with the gate pole of second field-effect tube, the first end electricity of the first end of first resistor and the power resistor
Connection, the other end are connected second resistance ground connection, and the output end of the first comparator is electrically connected to the first resistor and described
Between second resistance；First bleeder circuit includes the first divider resistance and the second divider resistance, first divider resistance
One end be electrically connected with the first end of the power resistor, the other end is connected second divider resistance ground connection, first ratio
It is electrically connected between first divider resistance and second divider resistance compared with the negative input end of device.
Optionally, the charging circuit includes third field-effect tube and the second comparison circuit, the third field-effect tube
Gate pole is electrically connected with second comparison circuit, the drain electrode of the third field-effect tube and the gate pole electricity of first field-effect tube
Connection, the source electrode ground connection of the third field-effect tube, the first end and second of second comparison circuit and the power resistor
End is electrically connected.
Optionally, second comparison circuit includes the second comparator, 3rd resistor, the 4th resistance and the 5th resistance, institute
The negative input end for stating the second comparator is electrically connected with the second end of the power resistor, the output end of second comparator and institute
State third field-effect tube gate pole electrical connection and be grounded by the 3rd resistor, the power end of second comparator with it is described
One end of the first end of power resistor and the 4th resistance is electrically connected, the other end the 5th resistance of series connection of the 4th resistance
It is electrically connected to the partial pressure end of second comparator, the positive input terminal of second comparator is electrically connected to the 4th resistance and the 5th
Between resistance.
Optionally, the charging circuit further includes indicating circuit, described indicating circuit one end and second comparator
Output end electrical connection, the other end are electrically connected with the second end of the power resistor.
Optionally, the indicating circuit includes the 6th resistance, light emitting diode and the 4th field-effect tube, the 6th resistance
One end is electrically connected with the second end of the power resistor, and the other end is electrically connected with the anode of the light emitting diode, and the described 4th
The drain electrode of field-effect tube is electrically connected with the cathode of the light emitting diode, and the gate pole of the 4th field-effect tube and described second compares
Output end compared with circuit is electrically connected, the source electrode ground connection of the 4th field-effect tube.
Second aspect, the embodiment of the present application also provide a kind of charger, including charge and discharge described in battery and first aspect
Circuit is managed, the management of charging and discharging circuit on one side is electrically connected with the battery, and the other end is electrically connected with external power supply, described to fill
Discharging management circuit is used to manage the charging and discharging of the battery.
Management of charging and discharging circuit and charger provided by the present application, by comparing the voltage of power resistor first end and second
The voltage at end controls battery charge or discharge.When battery is in charged state, the difference of the voltage of the voltage and second end of first end
When value is less than preset value, control charging circuit is disconnected, and battery charging terminates, and preventing, which influences battery because of over-charging of battery, uses the longevity
Life.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural block diagram for the management of charging and discharging circuit that one embodiment of the application provides；
Fig. 2 is the structural block diagram for the management of charging and discharging circuit that another embodiment of the application provides；
Fig. 3 is the structural block diagram for the management of charging and discharging circuit that another embodiment of the application provides；
Fig. 4 is the management of charging and discharging circuit connection diagram that one embodiment of the application provides；
Fig. 5 is the management of charging and discharging circuit connection diagram that another embodiment of the application provides；
Fig. 6 is the charger circuit connection schematic diagram that one embodiment of the application provides.
Icon: 10- management of charging and discharging circuit；20- external power supply；30- battery；100- switching circuit；110- power switch；
The first field-effect tube of 111-；200- charging circuit；300- discharge circuit；The second field-effect tube of 310-；The second comparison circuit of 320-；
321- first comparator；The first bleeder circuit of 322-；210- third field-effect tube；The second comparison circuit of 220-；221- second compares
Compared with device；400- indicating circuit；410- light emitting diode；The 4th field-effect tube of 420-.
Specific embodiment
To make the purpose of the embodiment of the present application, technical solution and a little clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments, the application being usually described and illustrated herein in the accompanying drawings are implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without creative efforts, belongs to the utility model
The range of protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area
Divide description, is not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
Fig. 1 is the structural block diagram for the management of charging and discharging circuit that one embodiment of the application provides, as shown in Figure 1, charge and discharge fulgurite
Managing circuit 10 includes: switching circuit 100, power resistor R1, charging circuit 200 and discharge circuit 300.Switching circuit 100 and outer
Portion's power supply 20 is electrically connected, the first end a1 and switching circuit 100, one end of charging circuit 200, discharge circuit of power resistor R1
300 one end is electrically connected, the second end b1 and battery 30, the other end of charging circuit 200, discharge circuit of power resistor R1
300 other end is electrically connected.
When the voltage of first end a1 is greater than the voltage of second end b1, charging circuit 200 is connected, and discharge circuit 300 is disconnected
It opens, battery 30 is in charged state, when battery 30 is in charged state, the voltage value of first end a1 and the voltage of second end b1
When the difference of value is less than preset value, charging circuit 200 is disconnected.When the voltage of first end is less than the voltage of second end, charging electricity
Road 200 disconnects, and discharge circuit 300 is connected, and battery 30 is in discharge condition.
It should be noted that management of charging and discharging circuit 10 is used to manage the charge and discharge of battery 30.When management of charging and discharging circuit
10 with battery 30 when being electrically connected, the discharge loop being made of switching circuit 100, power resistor R1 and discharge circuit 300, by battery
30 are used as power supply, are powered to external circuit.
When management of charging and discharging circuit 10 is electrically connected with battery 30 and external power supply 20, by switching circuit 100, power electricity
Resistance R1 and charging circuit 200 constitute charge circuit, are charged by external power supply 20 to battery 30, meanwhile, external power supply
20 are also powered external circuit.Wherein, external power supply 20 can be power grid.
Management of charging and discharging circuit 10 provided by the present application, when the switching circuit 100 of management of charging and discharging circuit 10 connects external electrical
When source 20, the voltage of the first end a1 of power resistor R1 is greater than the voltage of second end b1, and discharge circuit 300 disconnects, charging circuit
200 conductings.Charge circuit is constituted by switching circuit 100, power resistor R1 and charging circuit 200, is charged to battery 30.
When the difference of the voltage of first end a1 and the voltage of second end b1 is less than preset value, charging circuit 200 is disconnected, and battery 30 stops
Charging, prevents external power supply 20 from overcharging to battery 30, ensure that the service life of battery 30.
Optionally, Fig. 2 is the structural block diagram for the management of charging and discharging circuit that another embodiment of the application provides, as shown in Fig. 2,
Switching circuit 100 includes power switch 110, and the first contact s1 of power switch 110 is electrically connected with external power supply 20, power switch
110 the second contact s2 is electrically connected with the first end a1 of power resistor R1, the control terminal c and discharge circuit 300 of power switch 110
One end and the other end of charging circuit 200 be electrically connected.
When the voltage of the first end a1 of power resistor R1 is less than the voltage of second end b1, i.e. management of charging and discharging circuit 10 and outer
Portion's power supply 20 is not connected with namely the first contact s1 of power switch 110 is not electrically connected with external power supply 20, and the first contact s1 is in
Vacant state, the control terminal c and discharge circuit 300 of power switch 110 are connected, the second contact s2 and power of power switch 110
The first end a1 of resistance R1 is electrically connected, and the second end b1 of power resistor R1 is electrically connected with battery 30, discharge loop conducting, battery 30
Electric discharge.
When the voltage of the first end a1 of power resistor R1 is greater than the voltage of second end b1, i.e. management of charging and discharging circuit 10 and outer
First contact s1 of the connection of portion's power supply 20 namely power switch 110 is electrically connected with external power supply 20, and charging circuit 200 is connected, and is put
Circuit 300 disconnects, and battery 30 charges.
Power switch 110 is connect with discharge circuit 300 and charging circuit 200, for charge circuit or discharge loop to be connected,
Control the charge or discharge of battery 30.Optionally, power switch 110 can be thyristor, field-effect tube, triode etc..In
It in the present embodiment, is illustrated so that power switch 110 is P-channel field-effect transistor (PEFT) pipe as an example, specifically, Fig. 3 is another reality of the application
The structural block diagram of the management of charging and discharging circuit 10 of example offer is provided, as shown in figure 3, power switch 110 is the first field-effect tube 111,
The source S of first field-effect tube 111 is electrically connected with external power supply 20, the drain D and discharge circuit 300 of the first field-effect tube 111
One end of electrical connection and the first end a1 electrical connection of power resistor R1, the gate pole G and discharge circuit 300 of the first field-effect tube 111
One end and the other end of charging circuit 200 be electrically connected.
When the voltage of first end a1 is less than the voltage of second end b1, i.e. the first field-effect tube 111 with external power supply 20 not
It connects, electric current flows to second end b1 from first end a1, and charging circuit 200 disconnects, and discharge circuit 300 is connected, and electric current is from first
The drain electrode of effect pipe 111 flows to source electrode, and battery 30 is in discharge condition.
When the voltage of first end a1 is greater than the voltage of second end b1, i.e., the first field-effect tube 111 connects with external power supply 20
Logical, electric current flows to first end a1 from second end b1, and charging circuit 200 is connected, and discharge circuit 300 disconnects, and electric current is imitated from first
Should the source electrode of pipe 111 flow to drain electrode, battery 30 is in charged state.When first end a1 voltage in second end b1 voltage difference
When value is less than preset value, charging circuit 200 is disconnected.
Optionally, Fig. 4 is the management of charging and discharging circuit connection diagram that one embodiment of the application provides, as shown in figure 4, putting
Circuit 300 includes the second field-effect tube 310 and the first comparison circuit.In the present embodiment with the second field-effect tube 310 for N ditch
It is illustrated for road field-effect tube, the drain D of the second field-effect tube 310 is electrically connected to power switch by current-limiting resistance R2
110 the second contact b1, the gate pole G of the second field-effect tube 310 are electrically connected with the first comparison circuit, the second field-effect tube 310
Source S ground connection, the first comparison circuit are electrically connected with the first end a1 of power resistor R1 and second end b1.
Optionally, first comparator 321 is TLV3401 comparator.
Optionally, with continued reference to Fig. 4, the first comparison circuit includes first comparator 321 and the first bleeder circuit 322, and
The first end a1 of the power end d1 and power resistor R1 of one comparator 321 are electrically connected, the positive input terminal e1 of first comparator 321 with
The second end b1 of power resistor R1 is electrically connected, and the negative input end f1 of first comparator 321 is electrically connected with the first bleeder circuit 322,
The output end g1 of first comparator 321 is electrically connected with the gate pole G of the second field-effect tube 310, the first end and function of first resistor Ra
The first end a1 of rate resistance R1 is electrically connected, and the other end is connected second resistance Rb ground connection, the Ausgang 1 of first comparator 321 and the
The gate pole G of two field-effect tube 310 is each coupled electrically between first resistor and second resistance.
It should be noted that the power end d1 of first comparator 321 is electrically connected with first end a1, first comparator 321
Positive input terminal e1 is electrically connected with second end b1, to obtain the voltage value of first end a1 and the both ends second end b1.
When first end a1 voltage is less than second end b1 voltage, the output end g1 of first comparator 321 exports high level, then
First resistor Ra and second resistance Rb partial pressure, the second field-effect tube 310 are connected, and electric current is flowed from the gate pole G of the second field-effect tube 310
To the drain D of the second field-effect tube 310.Since the gate pole G of the drain D and the first field-effect tube 111 of the second field-effect tube 310 connects
It is logical, so that the first field-effect tube 111 is connected.
When first end a1 voltage is greater than second end b1 voltage, the output end g1 of first comparator 321 exports low level, then
Voltage value is 0 between first resistor Ra and second resistance Rb.It is to be understood that 321 output end g1 of first comparator passes through second
Resistance Rb ground connection.Since the gate pole G of the second field-effect tube 310 is electrically connected between first resistor Ra and second resistance Rb, therefore the
The voltage value of the gate pole G of two field-effect tube 310 is 0, it can be understood as, the gate pole G of the second field-effect tube 310 passes through second resistance
Rb ground connection.Since the voltage value of the gate pole G of the second field-effect tube 310 is 0, therefore the second field-effect tube 310 is ended, therefore, with the
The first field-effect tube 111 cut-off of two field-effect tube, 310 drain D electrical connection has no way of first that is, in the first field-effect tube 111
The drain D of field-effect tube 111 flows to the electric current of its source S.
Continue to be illustrated so that power switch 110 is P-channel field-effect transistor (PEFT) pipe as an example, the gate pole G of the first field-effect tube 111 makees
Be electrically connected for the control terminal c of power switch 110 with the drain D of the second field-effect tube 310, the drain D of the second field-effect tube 310 with
The first end a1 of power resistor R1 is electrically connected.Electric current flows to the second field-effect tube 310 from the gate pole G of the second field-effect tube 310
Drain D, since the drain D of the second field-effect tube 310 is electrically connected with the gate pole G of the first field-effect tube 111, so that the first field-effect
The source S of the first field-effect tube of current direction 111 of the drain D of pipe 111, battery 30 are in discharge condition.
When first end a1 voltage is greater than second end b1 voltage, the output end g1 of first comparator 321 exports low level, the
The conducting direction that the cut-off of two field-effect tube 310, i.e. charging circuit 200 not can control the first field-effect tube 111.
With continued reference to Fig. 4, the first bleeder circuit 322 includes the first divider resistance R3 and the second divider resistance R4, and first point
One end of piezoresistance R3 is electrically connected with the first end a1 of power resistor R1, other end series connection the second divider resistance R4 ground connection, and first
The negative input end f1 of comparator 321 is electrically connected between the first divider resistance R3 and the second divider resistance R4.
Optionally, Fig. 5 is the management of charging and discharging circuit connection diagram that another embodiment of the application provides, as shown in figure 5,
Charging circuit 200 includes third field-effect tube 210 and the second comparison circuit 220, the gate pole G of third field-effect tube 210 and second
Comparison circuit 220 is electrically connected, and the drain D of third field-effect tube 210 is electrically connected with the gate pole G of the first field-effect tube 111, third field
The source pole S of effect pipe 210 is grounded, and the second comparison circuit 220 is electrically connected with the first end a1 of power resistor R1 and second end b1.
Optionally, third field-effect tube 210 is N-channel field-effect tube.
It should be understood that when the voltage of the first end a1 of power resistor R1 is greater than the voltage of second end b1, i.e. charge and discharge fulgurite
Reason circuit 10 is connected to external power supply 20 namely the source S of the first field-effect tube 111 is electrically connected with external power supply 20.First
The gate pole G and charging circuit 200 of effect pipe 111 are connected, and the source S of the first field-effect tube 111 is electrically connected with external power supply 20, the
The drain D of one field-effect tube 111 is electrically connected with the first end a1 of power resistor R1, the second end b1 and battery 30 of power resistor R1
Electrical connection forms charge circuit, charges to battery 30.When battery 30 is in charged state, the voltage value of first end a1
When being less than preset value with the difference of the voltage value of second end b1, charging circuit 200 is disconnected, and prevents that battery 30 from overcharging and influencing it makes
Use the service life.
With continued reference to Fig. 5, the second comparison circuit 220 include the second comparator 221,3rd resistor R5, the 4th resistance R6 and
The second end b1 of 5th resistance R7, the negative input end f2 and power resistor R1 of the second comparator 221 are electrically connected, the second comparator
221 output end g2 is electrically connected with the gate pole G of third field-effect tube 210 and is grounded by 3rd resistor R5, the second comparator 221
Power end d2 be electrically connected with one end of the first end a1 of power resistor R1 and the 4th resistance R6, the other end of the 4th resistance R6
The 5th resistance R7 that connects is electrically connected to the partial pressure end h of the second comparator 221, the positive input terminal electricity e2 connection of the second comparator 221
To between the 4th resistance R6 and the 5th resistance R7.
Management of charging and discharging circuit 10 is electrically connected with external power supply 20 and battery 30, is charged to battery 30.Battery 30
The first stage of charging is charged using constant-current charge.The second stage that battery 30 charges is charged using constant-voltage charge.
In constant-current charging phase, since charging current is larger, punctures the source S and drain D of the first field-effect tube 111, make
Charging current flows to drain D from source S, charges to battery 30.The negative input end f2 and power resistor of second comparator 221
The second end b1 of R1 is electrically connected, to obtain the voltage value of second end b1.The power end d2 and power resistor R1 of second comparator 221
First end a1, to obtain the voltage value of first end a1.The voltage of first end a1 is greater than the voltage of second end b1, the second comparator
221 output end g2 exports high level, and third field-effect tube 210 is connected.
It should be noted that battery 30 is switched to the process of charging, i.e. management of charging and discharging circuit 10 and external electrical from electric discharge
The initial stage of initial stage namely constant-current charging phase that source 20 is connected.With continued reference to Fig. 4, in the first of constant-current charging phase
Stage beginning is greater than second end b1 voltage from first end a1 voltage, by the embodiment of above-mentioned discharge circuit 300 it is found that second effect
Should pipe 310 gate pole G voltage value be 0, the second field-effect tube 310 cut-off, be electrically connected with 310 drain D of the second field-effect tube
The cut-off of first field-effect tube 111.With continued reference to Fig. 5, in the constant-current charge initial stage, charging current is big, and discharge loop is ended
111 reverse breakdown of the first field-effect tube so that electric current flows to its drain D, battery 30 from the source S of the first field-effect tube 111
In charged state.
In constant voltage charging phase, since the output end g2 of the second comparator 221 exports high level, third field-effect tube 210
Conducting, and the drain D of third field-effect tube 210 is electrically connected with the gate pole G of the first field-effect tube 111, so that the first field-effect tube
111 constant conductions.In the later period of constant-current charging phase, charging current is gradually reduced, and then the voltage and second end of first end a1
The voltage difference of b1 reduces.When the difference is less than preset value, then the output end g2 of the second comparator 221 exports low level, the
The cut-off of three field-effect tube 210.Since third field-effect tube 210 is ended, therefore the gate pole of the first field-effect tube 111 powers off, then and first
Field-effect tube 111 is ended, and charge circuit disconnects, 30 charge cutoff of battery.
It is that AD8214 comparator is illustrated with the second comparator 221, sets preset value as 500mV, when battery 30 charges
Into the later period of constant-voltage charge, charging current be reduced to 100mA hereinafter, the voltage of the voltage and second end b1 of first end a1 difference
When value is less than 500mV, due to having 2.4V voltage-stablizer inside the second comparator 221, to positive input terminal e2's and negative input end f1
Output electric current is adjusted, so that the electric current of positive input terminal e2 is less than the electric current of negative input end f1, output end g1 exports low level,
So that third field-effect tube 210 is ended, the gate pole power-off of the first field-effect tube 111, then the first field-effect tube 111 is ended, charging
Circuit disconnects, 30 charge cutoff of battery.
With continued reference to Fig. 5, charging circuit 200 further includes indicating circuit 400,400 one end of indicating circuit and the second comparator
221 output end g2 electrical connection, the other end are electrically connected with the second end b1 of power resistor R1.
When the voltage of power resistor R1 first end a1 is bigger than the voltage of second end b1, the output end of the second comparator 221
G2 exports high level, and indicating circuit 400 works, shows to charged state.
With continued reference to Fig. 5, indicating circuit 400 includes the 6th resistance R8, light emitting diode 410 and the 4th field-effect tube 420,
6th one end resistance R8 is electrically connected with the second end b1 of power resistor R1, and the positive a2 of the other end and light emitting diode 410 is electrically connected
It connects, the drain D of the 4th field-effect tube 420 is electrically connected with the cathode b2 of light emitting diode 410, the gate pole G of the 4th field-effect tube 420
It is electrically connected with the output end g2 of the second comparison circuit 220, the source S ground connection of the 4th field-effect tube 420.
It should be understood that the source S of the 4th field-effect tube 420 is grounded, therefore sense of current in the 4th field-effect tube 420
Are as follows: the drain D of the 4th field-effect tube 420 to source S.
When the voltage of power resistor R1 first end a1 is bigger than the voltage of second end b1, the output end of the second comparator 221
G2 exports high level.The output end g2 of second comparator 221 is connect with the gate pole G of the 4th field-effect tube 420, so that the 4th effect
Should pipe 420 be connected, electric current flows to source S, the anode of the direction and light emitting diode 410 from the drain D of the 4th field-effect tube 420
The direction of a2 to cathode b2 are identical.Therefore the positive a2 of light emitting diode 410 to cathode b2 is to the drain D of the 4th field-effect tube 420
Indicating circuit conducting.
It should be noted that the 6th resistance R8 is current-limiting resistance, prevent light emitting diode 410 from burning.
Fig. 6 is the charger circuit connection schematic diagram that one embodiment of the application provides, as shown in fig. 6, charger includes electricity
Pond 30 and management of charging and discharging circuit 10 provided by the above embodiment, 10 one end of management of charging and discharging circuit are electrically connected with battery 30, separately
One end is electrically connected with external power supply 20, and management of charging and discharging circuit 10 is used to manage the charging and discharging of battery 30.
Management of charging and discharging circuit and charger provided in this embodiment, by judge the both ends power resistor R1 voltage it is big
It is small that charge or discharge are carried out to battery 30.When the voltage of power resistor R1 first end a1 is smaller than the voltage of second end b1, first
The output end g1 of comparator 321 exports high level, connects the first field-effect tube 111 and the second field-effect tube 310, and electric current is from first
The drain D of field-effect tube 111 flows to source S, battery discharge.When electricity of the voltage than second end b1 of power resistor R1 first end a1
When pressing big, the source S of the first field-effect tube of electric current 111 flows to drain D, and the output end g1 of first comparator 321 exports low level,
Discharge circuit 300 disconnects；The output end g2 of second comparator 221 exports high level, so that the electric current side of the first field-effect tube 111
To remaining source S to the direction of drain D, when the difference of the voltage of the voltage and second end b1 of first end a1 is less than preset value
When, the output end g2 of the second comparator 221 exports low level, and third field-effect tube 210 is ended, correspondingly, the first field-effect tube
111 cut-offs, battery charging stop, preventing over-charging of battery, ensure that the service life of battery.
Claims (10)
1. a kind of management of charging and discharging circuit characterized by comprising switching circuit, power resistor, charging circuit and electric discharge electricity
Road, the switching circuit are electrically connected with external power supply, the first end of the power resistor and the switching circuit, charging circuit
One end, discharge circuit one end be electrically connected, the second end of the power resistor and battery, the other end of charging circuit, electric discharge
The other end of circuit is electrically connected；When the voltage of the first end is greater than the voltage of the second end, the charging circuit is led
It is logical, and the discharge circuit disconnects, the battery is in charged state；When the voltage of the first end and the electricity of the second end
When the difference of pressure is less than preset value, the charging circuit is disconnected, and locating battery stops charging；When the voltage of the first end is less than
When the voltage of the second end, the charging circuit is disconnected, and the discharging circuit conduction, the battery are in discharge condition.
2. management of charging and discharging circuit as described in claim 1, which is characterized in that the switching circuit includes power switch, institute
The first contact for stating power switch is electrically connected with the external power supply, the second contact of the power switch and the power resistor
First end electrical connection, the control terminal of the power switch and one end of the discharge circuit and the other end of the charging circuit
It is electrically connected.
3. management of charging and discharging circuit as claimed in claim 2, which is characterized in that the power switch is the first field-effect tube,
The source electrode of first field-effect tube is electrically connected with the external power supply, the drain electrode of first field-effect tube and electric discharge electricity
One end of road electrical connection and the first end electrical connection of the power resistor, the gate pole of first field-effect tube and electric discharge electricity
The other end of the one end on road and the charging circuit is electrically connected；It is described when the voltage of first end is greater than the voltage of second end
Charging circuit conducting, the discharge circuit disconnect, and electric current is flowed to from the source electrode of first field-effect tube and drained, when described first
When the voltage at end is less than the voltage of the second end, the charging circuit is disconnected, the discharging circuit conduction, and electric current is from described the
The drain electrode of one field-effect tube flows to source electrode.
4. management of charging and discharging circuit as claimed in claim 2, which is characterized in that the discharge circuit includes the second field-effect tube
With the first comparison circuit, the drain electrode of second field-effect tube is electrically connected to the second touching of the power switch by current-limiting resistance
Point, the gate pole of second field-effect tube are electrically connected with first comparison circuit, the source electrode ground connection of second field-effect tube,
First comparison circuit is electrically connected with the first end of the power resistor and second end.
5. management of charging and discharging circuit as claimed in claim 4, which is characterized in that first comparison circuit compares including first
Device and the first bleeder circuit, the power end of the first comparator are electrically connected with the first end of the power resistor, and described first
The positive input terminal of comparator is electrically connected with the second end of the power resistor, the negative input end of the first comparator and described the
The electrical connection of one bleeder circuit, the output end of the first comparator are electrically connected with the gate pole of second field-effect tube, the first electricity
The first end of resistance is electrically connected with the first end of the power resistor, other end series connection second resistance ground connection, the first comparator
Output end and the gate pole of the second field-effect tube be each coupled electrically between the first resistor and the second resistance；
First bleeder circuit includes the first divider resistance and the second divider resistance, one end of first divider resistance and institute
The first end electrical connection of power resistor is stated, other end series connection second divider resistance is grounded, and bearing for the first comparator is defeated
Enter end to be electrically connected between first divider resistance and second divider resistance.
6. management of charging and discharging circuit as claimed in claim 3, which is characterized in that the charging circuit includes third field-effect tube
With the second comparison circuit, the gate pole of the third field-effect tube is electrically connected with second comparison circuit, the third field-effect
The drain electrode of pipe is electrically connected with the gate pole of first field-effect tube, the source electrode ground connection of the third field-effect tube, second ratio
It is electrically connected compared with circuit with the first end of the power resistor and second end.
7. management of charging and discharging circuit as claimed in claim 6, which is characterized in that second comparison circuit compares including second
Device, 3rd resistor, the 4th resistance and the 5th resistance, the negative input end of second comparator and the second end of the power resistor
Electrical connection, the output end of second comparator are electrically connected with the gate pole of the third field-effect tube and by the 3rd resistors
Ground connection, the power end of second comparator and one end of the first end of the power resistor and the 4th resistance are electrically connected
It connects, the other end the 5th resistance of series connection of the 4th resistance is electrically connected to the partial pressure end of second comparator, second ratio
Positive input terminal compared with device is electrically connected between the 4th resistance and the 5th resistance.
8. management of charging and discharging circuit as claimed in claim 7, which is characterized in that the charging circuit further includes indicating circuit,
Described indicating circuit one end is electrically connected with the output end of second comparator, the second end electricity of the other end and the power resistor
Connection.
9. management of charging and discharging circuit as claimed in claim 8, which is characterized in that the indicating circuit includes the 6th resistance, hair
Optical diode and the 4th field-effect tube, described 6th resistance one end are electrically connected with the second end of the power resistor, the other end with
The anode electrical connection of the light emitting diode, the drain electrode of the 4th field-effect tube and the cathode of the light emitting diode are electrically connected
It connects, the gate pole of the 4th field-effect tube is electrically connected with the output end of second comparison circuit, the 4th field-effect tube
Source electrode ground connection.
10. a kind of charger, which is characterized in that including battery and such as the described in any item management of charging and discharging electricity of claim 1-9
Road, the management of charging and discharging circuit on one side are electrically connected with the battery, and the other end is electrically connected with external power supply, the charge and discharge fulgurite
Reason circuit is used to manage the charging and discharging of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920653798.8U CN209593069U (en) | 2019-05-07 | 2019-05-07 | Management of charging and discharging circuit and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920653798.8U CN209593069U (en) | 2019-05-07 | 2019-05-07 | Management of charging and discharging circuit and charger |
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| CN209593069U true CN209593069U (en) | 2019-11-05 |
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ID=68347117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920653798.8U Active CN209593069U (en) | 2019-05-07 | 2019-05-07 | Management of charging and discharging circuit and charger |
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| CN (1) | CN209593069U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110676913A (en) * | 2019-11-11 | 2020-01-10 | Oppo广东移动通信有限公司 | Charging method, terminal, conversion device and storage medium |
| TWI710197B (en) * | 2019-12-25 | 2020-11-11 | 王進和 | Battery module with a hot swap function and control method thereof |
| CN112018828A (en) * | 2020-08-31 | 2020-12-01 | 广州极飞科技有限公司 | Power supply module and communication device |
| CN112054577A (en) * | 2020-09-08 | 2020-12-08 | 北京海益同展信息科技有限公司 | Charging device, charging mode detection method, charging protection method, and robot |
-
2019
- 2019-05-07 CN CN201920653798.8U patent/CN209593069U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110676913A (en) * | 2019-11-11 | 2020-01-10 | Oppo广东移动通信有限公司 | Charging method, terminal, conversion device and storage medium |
| CN110676913B (en) * | 2019-11-11 | 2023-08-04 | Oppo广东移动通信有限公司 | Charging method, terminal, conversion device and storage medium |
| TWI710197B (en) * | 2019-12-25 | 2020-11-11 | 王進和 | Battery module with a hot swap function and control method thereof |
| CN112018828A (en) * | 2020-08-31 | 2020-12-01 | 广州极飞科技有限公司 | Power supply module and communication device |
| CN112054577A (en) * | 2020-09-08 | 2020-12-08 | 北京海益同展信息科技有限公司 | Charging device, charging mode detection method, charging protection method, and robot |
| CN112054577B (en) * | 2020-09-08 | 2023-01-31 | 京东科技信息技术有限公司 | Charging device, charging mode detection method, charging protection method, and robot |
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