CN104600797B - Battery management circuit and terminal - Google Patents
Battery management circuit and terminal Download PDFInfo
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- CN104600797B CN104600797B CN201510009542.XA CN201510009542A CN104600797B CN 104600797 B CN104600797 B CN 104600797B CN 201510009542 A CN201510009542 A CN 201510009542A CN 104600797 B CN104600797 B CN 104600797B
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- 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
Abstract
The invention discloses a kind of battery management circuit and terminal, belong to electronic technology field.The circuit, including：Management switch for connecting battery and power management chip, and the start-up circuit that positive pole with the battery, the control end of the management switch are respectively connected with；The start-up circuit, for after starting-up signal is received, the management switch to be switched to conducting state by the voltage provided using the positive pole of the battery by cut-off state.Management switch is switched to conducting state by the voltage that the present invention utilizes the battery in terminal to provide by increasing start-up circuit by cut-off state；Solving needs the problem of charger could reopen the switching tube that off-mode ShiShimonoseki is had no progeny；Reach on the premise of expending considerably less electricity or not expending electricity, the effect that the switching tube that off-mode ShiShimonoseki is had no progeny can be also reopened without charger.
Description
The application be submit within 2 5th, 2013 Patent Office of the People's Republic of China, it is Application No. 201310047399.4, entitled
The divisional application of the Chinese patent application of " battery management circuit and terminal ".
Technical field
The present invention relates to electronic technology field, more particularly to a kind of battery management circuit and terminal.
Background technology
The mobile terminal of such as smart mobile phone, tablet personal computer and E-book reader etc is used in people's daily life
Most commonly used electronic product.Mobile terminal is generally all powered by built-in battery.
Fig. 1 is refer to, it illustrates the connection diagram between each component related to power supply in mobile terminal.The shifting
Dynamic terminal includes USB (Universal Serial BUS, USB) interface 102, charging input end 104, battery
106th, power management chip 108, switch control module 110 and system 112.Wherein, the positive pole of battery 106 passes through management switch P1
It is connected with power management chip 108, management switch P1 control end is connected with switch control module 110.When mobile terminal is in
During shutdown, management switch P1 is typically at conducting state.Although now system does not start, power management chip
108 and some other circuit be still power consumption.Understood through measurement, the shutdown electric current is probably in 0.2mA or so, relative to normal
Electric current very little when using, almost can be ignored.But in some occasions, this shutdown electric current will produce influence, example
Such as：The mobile terminal is the mobile phone of not pluggable battery, namely in storage, battery is non-removable, can only be mounted in mobile phone
So that battery last power consumption.Assuming that the capacity of battery 106 is 1600mA, 70% calculating according to the electricity, then battery when dispatching from the factory
Battery electric quantity in 106 can maintain 1600*0.7/ (0.2*24)=233 day.If that is, mobile phone exceedes after dispatching from the factory
It is not used within 233 days, may result in mobile phone and cannot be started up.And mobile phone is with this low discharging current of 0.2MA sizes, it is more likely that
By battery 106 be changed into being difficult to recovering can not use state.In addition, some power management chips 108 have certain defect,
Running status is not known in the case of not starting shooting, and be may result in some DC-DC (DC-to-dc) circuit and is directly worked, so
Shutdown electric current will reach mA ranks, be calculated with 5mA, then the battery electric quantity in the battery 106 can maintain 1600*0.7/ (5*24)
=9 days.Therefore, during some mobile phone shutdowns, management switch P1 can be given tacit consent to by switch control module 110 and turned off so that battery
106 and power management chip 108 disconnect so that battery 106 will not power consumption.
During the present invention is realized, inventor has found that background technology at least has problems with：If will during shutdown
Management switch P1 acquiescence shut-offs, then because power management chip 108 is not powered in shutdown so that must be inserted during start
Charger, the power supply provided using charger opens management switch P1 come controlling switch control module 110, then by battery
106 power to power management chip 108.Obviously, under such a scheme, it cannot be started up if user does not carry charger,
There is larger defect.
The content of the invention
In order to solve to need the problem of charger could reopen the switching tube that off-mode ShiShimonoseki is had no progeny, the present invention
Embodiment provides a kind of battery management circuit and terminal.The technical scheme is as follows：
According to the first aspect of the invention there is provided a kind of battery management circuit, the circuit, including：For connecting electricity
Pond and the management switch of power management chip, and positive pole with the battery, the control end of the management switch are respectively connected with
Start-up circuit；
The start-up circuit, for after starting-up signal is received, the voltage provided using the battery is by the management
Switch switches to conducting state by cut-off state；
The management switch be PMOS switch pipe, the start-up circuit, including：First resistor, second resistance and first open
Close；One end of the first resistor is connected by the first switch with the positive pole of the battery, the first resistor it is another
End is connected with the control end of the management switch；One end of the second resistance is connected with the control end of the management switch, institute
State the other end ground connection of second resistance；The first switch, for after starting-up signal is received, being switched to and being cut by conducting state
Only state；The resistance R1 of the first resistor and resistance R2 of second resistance ratio is met：R1/R2<VG/(VBAT-VG),
Wherein, VGFor the conducting voltage threshold value of the management switch, VBATFor the cathode voltage of the battery.
Preferably, the first switch is the electronic switch in cut-off state when control end receives high level, described
Battery management circuit also includes：First switch enables circuit；
The first switch enables circuit, including：Power switch, 3rd resistor, T triggers and phase inverter；
One end ground connection of the power switch, the other end of the power switch passes through the 3rd resistor and the battery
Positive pole be connected；
The CLK ends of the T triggers are connected with the other end of the power switch, the Q ends of the T triggers and described the
The control end of one switch is connected；
The input of the phase inverter is connected with the Q ends of the T triggers, and the output end of the phase inverter is touched with the T
The T ends for sending out device are connected.
Preferably, the CLR ends of the T triggers are connected with shutdown module；
The shutdown module, for when receiving off signal, exporting CLR end of the reset signal to the T triggers.
Preferably, the T triggers are the T triggers that trailing edge triggers upset.
Preferably, the T triggers are the T triggers that rising edge triggers upset, the T triggers and the power switch
The other end between be additionally provided with the second phase inverter；
The input of second phase inverter is connected with the other end of the power switch, the output of second phase inverter
End is connected with the CLK ends of the T triggers.
According to the second aspect of the invention there is provided a kind of battery management circuit, the circuit, including：For connecting electricity
Pond and the management switch of power management chip, and positive pole with the battery, the control end of the management switch are respectively connected with
Start-up circuit；
The start-up circuit, for after starting-up signal is received, the voltage provided using the battery is by the management
Switch switches to conducting state by cut-off state；
The start-up circuit, for after starting-up signal is received, the voltage provided using the positive pole of the battery will
The management switch switches to conducting state by cut-off state；The management switch is PMOS switch pipe, the start-up circuit, bag
Include：First resistor, first switch and second switch；One end of the first resistor passes through the first switch and the battery
Positive pole is connected, and the other end of the first resistor is connected with the control end of the management switch；One end of the second switch with
The control end of the management switch is connected, the other end ground connection of the second switch；The first switch, for receiving out
After machine signal, cut-off state is switched to by conducting state；The second switch, for after starting-up signal is received, by ending
State switches to conducting state.
Preferably, the first switch is the electronic switch in cut-off state when control end receives high level, described
Battery management circuit also includes：First switch enables circuit；
The first switch enables circuit, including：Power switch, 3rd resistor, T triggers and phase inverter；
One end ground connection of the power switch, the other end of the power switch passes through the 3rd resistor and the battery
Positive pole be connected；
The CLK ends of the T triggers are connected with the other end of the power switch, the Q ends of the T triggers and described the
The control end of one switch is connected；
The input of the phase inverter is connected with the Q ends of the T triggers, and the output end of the phase inverter is touched with the T
The T ends for sending out device are connected.
Preferably, the second switch is that control end receives electronic switch in the conduction state during high level, described
Battery management circuit also includes：Second switch enables circuit；
The second switch enables circuit, including：Power switch, 3rd resistor, T triggers and phase inverter；
One end ground connection of the power switch, the other end of the power switch passes through the 3rd resistor and the battery
Positive pole be connected；
The CLK ends of the T triggers are connected with the other end of the power switch, the Q ends of the T triggers and described the
The control end of two switches is connected；
The input of the phase inverter is connected with the Q ends of the T triggers, and the output end of the phase inverter is touched with the T
The T ends for sending out device are connected.
Preferably, the CLR ends of the T triggers are connected with shutdown module；
The shutdown module, for when receiving off signal, exporting CLR end of the reset signal to the T triggers.
Preferably, the T triggers are the T triggers that trailing edge triggers upset.
Preferably, the T triggers are the T triggers that rising edge triggers upset, the T triggers and the power switch
The other end between be additionally provided with the second phase inverter；
The input of second phase inverter is connected with the other end of the power switch, the output of second phase inverter
End is connected with the CLK ends of the T triggers.
According to the third aspect of the invention we there is provided a kind of terminal, the terminal includes battery, power management chip and electricity
Pond manages circuit；
The battery management circuit is such as first aspect, various preferred schemes, second aspect or the second party of first aspect
Battery management circuit described in the various preferred schemes in face.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
The voltage for utilizing the battery in terminal to provide by increasing start-up circuit is switched management switch by cut-off state
For conducting state；Solving needs the problem of charger could reopen the switching tube that off-mode ShiShimonoseki is had no progeny；Reach
, without charger also can be by off-mode ShiShimonoseki on the premise of expending considerably less electricity or not expending electricity
The effect that the switching tube having no progeny is reopened.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the connection diagram between related to power supply each component in mobile terminal；
Fig. 2 is the structural representation for the battery management circuit that the embodiment of the present invention one is provided；
Fig. 3 is the circuit diagram for the battery management circuit that the embodiment of the present invention two is provided；
Fig. 4 is the circuit diagram for the battery management circuit that the embodiment of the present invention three is provided；
Fig. 5 is the circuit diagram for the battery management circuit that the embodiment of the present invention four is provided；
Fig. 6 is the circuit diagram for the battery management circuit that the embodiment of the present invention five is provided.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is preferably described in detail.
Embodiment one
Fig. 2 is refer to, the structural representation of the battery management circuit provided it illustrates the embodiment of the present invention one.The battery
Management circuit can be used in such as smart mobile phone, tablet personal computer, E-book reader, MP3 and MP4 etc terminal.The electricity
Pond manages circuit, including：Management switch P1 for connecting battery 202 and power management chip 204, and with battery 202 just
The start-up circuit 220 that pole, management switch P1 control end are respectively connected with.
Start-up circuit 220, for after starting-up signal is received, the voltage provided using battery 202 is by management switch P1
Conducting state is switched to by cut-off state.
In summary, the battery management circuit that the present embodiment is provided, the electricity in terminal is utilized by increasing start-up circuit
Management switch is switched to conducting state by the voltage that pond is provided by cut-off state；Solving needs charger could be by off-mode
The problem of switching tube that ShiShimonoseki is had no progeny is reopened；The premise of electricity is reached in the considerably less electricity of consuming or has not been expended
Under, the effect that the switching tube that off-mode ShiShimonoseki is had no progeny can be also reopened without charger.
Embodiment two
Fig. 3 is refer to, the circuit diagram of the battery management circuit provided it illustrates the embodiment of the present invention two.The battery
Management circuit can be used in such as smart mobile phone, tablet personal computer, E-book reader, MP3 and MP4 etc terminal.As
It is main using management switch as PMOS switch pipe in the particularly preferred embodiment provided based on embodiment one, the present embodiment
(Positive Channel Metal Oxide Semiconductor, P-channel metal-oxide-semiconductor) is illustrated.
The battery management circuit, including：Management switch P1 and start-up circuit 220.
Management switch P1 can be PMOS switch pipe.Management switch P1 one end is connected with the positive pole of battery 202, and management is opened
The other end for closing P1 is connected with power management chip 204.
Start-up circuit 220 includes first resistor R1, second resistance R2 and first switch K1.Wherein：
It (is also management switch P1 leakage that first resistor R1 one end is connected by first switch K1 with the positive pole of battery 202
Pole S), the first resistor R1 other end is connected with management switch P1 control end, namely management switch P1 grid G.
Second resistance R2 one end is connected with management switch P1 control end, second resistance R2 other end ground connection.Obviously,
First resistor R1 and second resistance R2 constitute bleeder circuit.It should be noted that second resistance R2 resistance needs are sufficiently large,
To ensure that the electricity of consumption is very small.Meanwhile, when second resistance R2 resistance is sufficiently large relative to first resistor R1 resistance,
The voltage for enabling to assign between management switch P1 drain and gate is very small, and the voltage is less than management switch P1's
Conducting voltage threshold value VG.That is, it is assumed that the resistance of first resistor is R1, and the resistance of second resistance is R2, then should meet：
VBAT-VBAT*R2/(R1+R2)<VG。
Calculated and understood according to above formula, R1/R2<VG/(VBAT-VG), wherein, VGFor management switch P1 conducting voltage threshold value,
VBATFor the cathode voltage of battery 202.
First switch K1, for after starting-up signal is received, cut-off state to be switched to by conducting state.
Using first resistor R1 resistance as 50K, second resistance R2 resistance is 1M, and the voltage of the positive pole of battery 202 is 3.8V
Exemplified by, in the power-offstate, management switch P1 is in cut-off state, and first switch K1 is in the conduction state.Now, by the first electricity
The electric current of the bleeder circuit consumption of resistance R1 and second resistance R2 compositions is equal to：VBAT/ (R1+R2)=3.8/1050000=3.62 μ
A, almost can be ignored.The pressure difference between management switch P1 grid G and drain electrode S is 3.8*1000000/ simultaneously
1050000-3.8=-0.181V, the switching threshold (typically wanting more than 0.5V) less than management switch P1.
But when user presses the start of power switch (not shown), first switch K1 can receive starting-up signal and
Cut-off state is switched to from conducting state.Now, management switch P1 grid G is grounded by second resistance R2, i.e., voltage is 0V,
And management switch P1 drain electrode S voltage is VBAT, reach the conducting voltage threshold value for opening management switch P1, management switch P1 by
Cut-off state switches to conducting state.Hereafter, battery 202 starts to power to power management chip 204, can be transported with normal boot-strap
OK.
First switch K1 can be mechanical switch or electronic switch.In the present embodiment using first switch K1 as
Illustrated exemplified by mechanical electronic switch.First switch K1 meets following condition：After being once pressed, first switch K1
Conducting state is switched to by cut-off state, first switch K1 is now unclamped, first switch K1 can also maintain conducting state.Only when
After being pressed again, first switch K1 just can switch to cut-off state by conducting state, during same release first switch K1, also
Continue to cut-off state.
In summary, the battery management circuit that the present embodiment is provided, the start-up circuit of bleeder circuit is included by increase
Management switch is switched into conducting state by cut-off state come the voltage that utilizes the battery in terminal to provide；Solving needs charging
The problem of device could reopen the switching tube that off-mode ShiShimonoseki is had no progeny；Reach and expended the premise of considerably less electricity
Under, the effect that the switching tube that off-mode ShiShimonoseki is had no progeny can be also reopened without charger.
Embodiment three
Fig. 4 is refer to, the circuit diagram of the battery management circuit provided it illustrates the embodiment of the present invention three.The battery
Management circuit can be used in such as smart mobile phone, tablet personal computer, E-book reader, MP3 and MP4 etc terminal.As
The particularly preferred embodiment provided based on embodiment two, it is main to realize first switch by electronic switch in the present embodiment
K1 is illustrated.The battery management circuit, including：Management switch P1, start-up circuit 220 and first switch drive circuit
240。
Management switch P1 can be PMOS switch pipe.Management switch P1 one end is connected with the positive pole of battery 202, and management is opened
The other end for closing P1 is connected with power management chip 204.
Start-up circuit 220 includes first resistor R1, second resistance R2 and first switch K1.Wherein：
It (is also management switch P1 leakage that first resistor R1 one end is connected by first switch K1 with the positive pole of battery 202
Pole S), the first resistor R1 other end is connected with management switch P1 control end, namely management switch P1 grid G.
Second resistance R2 one end is connected with management switch P1 control end, second resistance R2 other end ground connection.Obviously,
First resistor R1 and second resistance R2 constitute bleeder circuit.It should be noted that second resistance R2 resistance needs are sufficiently large,
To ensure that the electricity of consumption is very small.Meanwhile, when second resistance R2 resistance is sufficiently large relative to first resistor R1 resistance,
The voltage for enabling to assign between management switch P1 drain and gate is very small, and the voltage is less than management switch P1's
Conducting voltage threshold value VG.That is, it is assumed that the resistance of first resistor is R1, and the resistance of second resistance is R2, then should meet：
VBAT-VBAT*R2/(R1+R2)<VG。
Calculated and understood according to above formula, R1/R2<VG/(VBAT-VG), wherein, VGFor management switch P1 conducting voltage threshold value,
VBATFor the cathode voltage of battery 202.
First switch K1, for after starting-up signal is received, cut-off state to be switched to by conducting state.First switch K1
Can be electronic switch, such as PMOS, or the electronic switch or packaged switching device that other integrated circuits are realized
Etc..
First switch drive circuit 240 is used for the on or off for controlling first switch K1.First switch drive circuit
240 include：Power switch P2,3rd resistor R3, T trigger 242 and phase inverter 244.
Power switch P2 one end ground connection, the power switch P2 other end passes through 3rd resistor R3 and the positive pole of battery 202
It is connected.
The CLK ends of T triggers 242 are connected with the power switch P2 other end, Q ends and the first switch K1 of T triggers 242
Control end be connected.
The input of phase inverter 244 is connected with the Q ends of T triggers 242, output end and the T triggers 242 of phase inverter 244
T ends be connected.
First switch K1 can be the electronic switch in cut-off state when control end receives high level.T triggers 242
Can be the T triggers of trailing edge triggering upset.In the power-offstate, the CLK ends of T triggers 242 are high level, T triggers
242 Q ends are output as low level, now, and first switch K1 is in the conduction state, and management switch P1 is in cut-off state.When with
During the pushing power switch P2 of family, there is trailing edge appearance at the CLK ends of T triggers 242, and the Q ends output high level of T triggers 242 makes
Energy first switch K1 is changed into cut-off state from conducting state, and correspondingly, management switch P1 is changed into conducting state from cut-off state.Eventually
End starts normal starting procedure.When user unclamps power switch P2, there is rising edge appearance at the CLK ends of T triggers 242, but
It is due to that the Q ends of T triggers 242 are input to the T ends of T triggers 242 by phase inverter 244, now T ends are low level, so T
The Q ends of trigger 242 are still output as high level, will not overturn.
The CLR ends of T triggers 242 can also be connected with shutdown module 260.Shutdown module 260 is used to receive shutdown
During signal, CLR end of the reset signal to T triggers 242 is exported.The Q ends output low level of T triggers 242, first switch K1 is protected
Conducting state is held, management switch P1 is in cut-off state.Terminal normal shutdown, into battery saving mode.Shutdown module 260 can be wrapped
A pin on the mainboard of terminal is included, the pin is controlled by the operating system of terminal.
It should be noted that first switch K1, which can also be control end, receives electronics in the conduction state during high level
Switch, it is only necessary between the Q ends of T triggers 242 and first switch K1 and second switch K2 that a phase inverter is set more.
Similarly, T triggers 242 can also trigger the T triggers of upset using more common of rising edge, it is only necessary in power switch P2
It is between the CLK ends of T triggers 242 that a phase inverter is set more.
In summary, the battery management circuit that the present embodiment is provided, the start-up circuit of bleeder circuit is included by increase
Management switch is switched into conducting state by cut-off state come the voltage that utilizes the battery in terminal to provide；Solving needs charging
The problem of device could reopen the switching tube that off-mode ShiShimonoseki is had no progeny；Reach and expended the premise of considerably less electricity
Under, the effect that the switching tube that off-mode ShiShimonoseki is had no progeny can be also reopened without charger.
Example IV
Fig. 5 is refer to, the circuit diagram of the battery management circuit provided it illustrates the embodiment of the present invention four.The battery
Management circuit can be used in such as smart mobile phone, tablet personal computer, E-book reader, MP3 and MP4 etc terminal.As
The particularly preferred embodiment provided based on embodiment two, it is main to realize first switch by electronic switch in the present embodiment
K1 and second switch K2 is illustrated.The battery management circuit, including：Management switch P1, start-up circuit 220, first/
Second switch drive circuit 270.
Management switch P1 can be PMOS switch pipe.Management switch P1 one end is connected with the positive pole of battery 202, and management is opened
The other end for closing P1 is connected with power management chip 204.
Start-up circuit 220 includes first resistor R1, first switch K1 and second switch K2.Wherein：
It (is also management switch P1 leakage that first resistor R1 one end is connected by first switch K1 with the positive pole of battery 202
Pole S), the first resistor R1 other end is connected with management switch P1 control end, namely management switch P1 grid G.
Second switch K2 one end is connected with management switch P1 control end, second switch K2 other end ground connection.
First switch K1 is used for after starting-up signal is received, and cut-off state is switched to by conducting state.
Second switch K2 is used for after starting-up signal is received, and conducting state is switched to by cut-off state.
Continue using first resistor R1 resistance as 50K, exemplified by the voltage of the positive pole of battery 202 is 3.8V, in the power-offstate,
Management switch P1 is in cut-off state, and first switch K1 is in the conduction state, and second switch, which is in cut-off state, (can be considered as electricity
Hinder infinitely great resistance).Now, the pressure difference between management switch P1 grid G and drain electrode S is almost 0, less than management switch P1
Switching threshold.
But when user presses the start of power switch (not shown), first switch K1 can receive starting-up signal and
Cut-off state is switched to from conducting state, second switch K2 can receive starting-up signal and switch to conducting shape from cut-off state
State.Now, management switch P1 grid G is grounded by second switch K2, i.e., voltage is 0V, and management switch P1 drain electrode S
Voltage is VBAT, the conducting voltage threshold value for opening management switch P1 is reached, management switch P1 switches to conducting shape by cut-off state
State.Hereafter, battery 202 starts to power to power management chip 204, can be run with normal boot-strap.
First switch K1 can be mechanical switch or electronic switch.In the present embodiment using first switch K1 as
Illustrated exemplified by mechanical electronic switch.First switch K1 meets following condition：After being once pressed, first switch K1
Conducting state is switched to by cut-off state, first switch K1 is now unclamped, first switch K1 can also maintain conducting state.Only when
After being pressed again, first switch K1 just can switch to cut-off state by conducting state, if now unclamping first switch K1, also
Continue to cut-off state.
Second switch K2 can be mechanical switch or electronic switch.In the present embodiment using second switch K2 as
Illustrated exemplified by mechanical electronic switch.Second switch K2 can be in appearance set to first switch K1 one by
Button, second switch K2 meets following condition：After being once pressed, second switch K2 switches to cut-off state by conducting state,
Second switch K2 is now unclamped, second switch can also maintain cut-off state.Only after being pressed again, second switch K2 just meetings
Conducting state is switched to by cut-off state, if now unclamping second switch K2, conducting state is also continued to.
In summary, the battery management circuit that the present embodiment is provided, the electricity in terminal is utilized by increasing start-up circuit
Management switch is switched to conducting state by the voltage that pond is provided by cut-off state；Solving needs charger could be by off-mode
The problem of switching tube that ShiShimonoseki is had no progeny is reopened；Reach on the premise of electricity is not expended, also can without charger
The effect that enough switching tubes that off-mode ShiShimonoseki is had no progeny are reopened.
Embodiment five
Fig. 6 is refer to, the circuit diagram of the battery management circuit provided it illustrates the embodiment of the present invention five.The battery
Management circuit can be used in such as smart mobile phone, tablet personal computer, E-book reader, MP3 and MP4 etc terminal.As
The particularly preferred embodiment provided based on example IV, it is main with logical in the effect of more power saving, the present embodiment in order to obtain
Switch is crossed to replace second resistance R2 to realize that start-up circuit is illustrated.The battery management circuit, including：Management switch P1
With start-up circuit 220.
Management switch P1 can be PMOS switch pipe.Management switch P1 one end is connected with the positive pole of battery 202, and management is opened
The other end for closing P1 is connected with power management chip 204.
Start-up circuit 220 includes first resistor R1, first switch K1 and second switch K2.Wherein：
It (is also management switch P1 leakage that first resistor R1 one end is connected by first switch K1 with the positive pole of battery 202
Pole S), the first resistor R1 other end is connected with management switch P1 control end, namely management switch P1 grid G.
Second switch K2 one end is connected with management switch P1 control end, second switch K2 other end ground connection.
First switch K1 is used for after starting-up signal is received, and cut-off state is switched to by conducting state.First switch K1
Can be electronic switch, such as PMOS, or the electronic switch or packaged switching device that other integrated circuits are realized
Etc..
Second switch K2 is used for after starting-up signal is received, and conducting state is switched to by cut-off state.Second switch K2
Can be electronic switch, such as MMOS pipes, or the electronic switch or packaged switching device that other integrated circuits are realized
Etc..
First/second switch driving circuit 270 is used for the on or off for controlling first switch K1, and second switch
K2 cut-off or conducting.First/second switch driving circuit 270 includes：Power switch P2,3rd resistor R3, T trigger
272 and phase inverter 274.
Power switch P2 one end ground connection, the power switch P2 other end passes through 3rd resistor R3 and the positive pole of battery 202
It is connected.
The CLK ends of T triggers 272 are connected with the power switch P2 other end, and the Q ends of T triggers 272 are opened with first respectively
K1 is closed with second switch K2 control end to be connected.
The input of phase inverter 274 is connected with the Q ends of T triggers 272, output end and the T triggers 272 of phase inverter 274
T ends be connected.
First switch K1 can be the electronic switch in cut-off state, second switch K2 when control end receives high level
Can be that control end receives electronic switch in the conduction state during high level.T triggers 272 can be that trailing edge triggering is turned over
The T triggers turned.In the power-offstate, the CLK ends of T triggers 272 are high level, and the Q ends of T triggers 272 are output as low electricity
Flat, now, first switch K1 is in the conduction state, and second switch K2 is in cut-off state, and management switch P1 is in cut-off state.
As user pushing power switch P2, there are trailing edge appearance, the high electricity of Q ends output of T triggers 272 in the CLK ends of T triggers 272
It is flat, enable first switch K1 and cut-off state is changed into from conducting state, and enable second switch K2 is changed into turning on shape from cut-off state
State.Correspondingly, management switch P1 is changed into conducting state from cut-off state.Terminal starts normal starting procedure.When user unclamps
During power switch P2, there is a rising edge appearance at the CLK ends of T triggers 272, but are due to that the Q ends of T triggers 272 pass through phase inverter
274 are input to the T ends of T triggers 272, and now T ends are low level, so the Q ends of T triggers 272 are still output as high level,
It will not overturn.
The CLR ends of T triggers 272 can also be connected with shutdown module 260.Shutdown module 260 is used to receive shutdown
During signal, CLR end of the reset signal to T triggers 272 is exported.The Q ends output low level of T triggers 272, first switch K1 is protected
Conducting state is held, second switch K2 is in cut-off state, and management switch P1 is in cut-off state.Terminal normal shutdown, into province
Power mode.Module 260 of shutting down can include a pin on the mainboard of terminal, and the pin is controlled by the operating system of terminal.
It should be noted that only sharing same drive circuit with first switch K1 and second switch K2 in the present embodiment
Illustrate.It will be appreciated that second switch K1 and second switch K2 can have respective drive circuit respectively.First
It can also be that control end receives electronic switch in the conduction state during high level to switch K1；Second switch K2 can also be control
Electronic switch in cut-off state when system termination receives high level, it is only necessary at the Q ends of T triggers 272 and first switch K1
It is between second switch K2 that a phase inverter is set more.Similarly, T triggers 272 can also be risen using more common of
Along the T triggers of triggering upset, it is only necessary between the CLK ends of power switch P2 and T trigger 272 to set a phase inverter more
.
In summary, the battery management circuit that the present embodiment is provided, the electricity in terminal is utilized by increasing start-up circuit
Management switch is switched to conducting state by the voltage that pond is provided by cut-off state；Solving needs charger could be by off-mode
The problem of switching tube that ShiShimonoseki is had no progeny is reopened；Reach on the premise of battery electric quantity is not expended, without charger
Also the effect that the switching tube that off-mode ShiShimonoseki is had no progeny can be reopened.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can be by hardware
To complete, the hardware of correlation can also be instructed to complete by program, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (6)
1. a kind of battery management circuit, it is characterised in that the circuit, including：For connecting battery and power management chip
Management switch, and the start-up circuit that positive pole with the battery, the control end of the management switch are respectively connected with；
The start-up circuit, for after starting-up signal is received, the voltage provided using the positive pole of the battery will be described
Management switch switches to conducting state by cut-off state；The management switch be PMOS switch pipe, the start-up circuit, including：
First resistor, first switch and second switch；One end of the first resistor by the first switch and the battery just
Extremely it is connected, the other end of the first resistor is connected with the control end of the management switch；One end of the second switch and institute
The control end for stating management switch is connected, the other end ground connection of the second switch；The first switch, for receiving start
After signal, cut-off state is switched to by conducting state；The second switch, for after starting-up signal is received, by cut-off shape
State switches to conducting state；
The first switch is the electronic switch in cut-off state, the battery management circuit when control end receives high level
Also include：First switch enables circuit；
The first switch enables circuit, including：Power switch, 3rd resistor, T triggers and phase inverter；
One end ground connection of the power switch, the other end of the power switch by the 3rd resistor and the battery just
Extremely it is connected；
The CLK ends of the T triggers are connected with the other end of the power switch, and the Q ends of the T triggers are opened with described first
The control end of pass is connected；
The input of the phase inverter is connected with the Q ends of the T triggers, the output end of the phase inverter and the T triggers
T ends be connected.
2. battery management circuit according to claim 1, it is characterised in that the second switch is that control end receives height
Electronic switch in the conduction state during level, the battery management circuit also includes：Second switch enables circuit；
The second switch enables circuit, including：Power switch, 3rd resistor, T triggers and phase inverter；
One end ground connection of the power switch, the other end of the power switch by the 3rd resistor and the battery just
Extremely it is connected；
The CLK ends of the T triggers are connected with the other end of the power switch, and the Q ends of the T triggers are opened with described second
The control end of pass is connected；
The input of the phase inverter is connected with the Q ends of the T triggers, the output end of the phase inverter and the T triggers
T ends be connected.
3. battery management circuit according to claim 1 or 2, it is characterised in that the CLR ends of the T triggers and shutdown
Module is connected；
The shutdown module, for when receiving off signal, exporting CLR end of the reset signal to the T triggers.
4. battery management circuit according to claim 1 or 2, it is characterised in that the T triggers are that trailing edge triggering is turned over
The T triggers turned.
5. battery management circuit according to claim 1 or 2, it is characterised in that the T triggers are that rising edge triggering is turned over
The second phase inverter is additionally provided between the T triggers turned, the other end of the T triggers and the power switch；
The input of second phase inverter is connected with the other end of the power switch, the output end of second phase inverter with
The CLK ends of the T triggers are connected.
6. a kind of terminal, it is characterised in that the terminal includes battery, power management chip and battery management circuit；
The battery management circuit is the battery management circuit as described in any in claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510009542.XA CN104600797B (en) | 2013-02-05 | 2013-02-05 | Battery management circuit and terminal |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510009542.XA CN104600797B (en) | 2013-02-05 | 2013-02-05 | Battery management circuit and terminal |
| CN201310047399.4A CN103107577B (en) | 2013-02-05 | 2013-02-05 | Battery management circuit and terminal |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310047399.4A Division CN103107577B (en) | 2013-02-05 | 2013-02-05 | Battery management circuit and terminal |
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| Publication Number | Publication Date |
|---|---|
| CN104600797A CN104600797A (en) | 2015-05-06 |
| CN104600797B true CN104600797B (en) | 2017-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510009542.XA Active CN104600797B (en) | 2013-02-05 | 2013-02-05 | Battery management circuit and terminal |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448875B (en) * | 2018-03-05 | 2020-07-14 | 苏州佳世达光电有限公司 | Electronic device |
| WO2020061930A1 (en) * | 2018-09-27 | 2020-04-02 | 深圳市大疆创新科技有限公司 | Battery manager |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201114602Y (en) * | 2007-08-08 | 2008-09-10 | 青岛海信移动通信技术股份有限公司 | Power consumption control circuit applicable to dual working platform and the mobile phone with this circuit |
| CN201222659Y (en) * | 2008-07-11 | 2009-04-15 | 深圳市同洲电子股份有限公司 | Power supply circuit and mobile terminal |
| CN201550190U (en) * | 2009-10-15 | 2010-08-11 | 福建新大陆通信科技有限公司 | Standby circuit for STB |
| CN102097850A (en) * | 2010-12-31 | 2011-06-15 | 东莞市奇立电源有限公司 | Method and device for controlling multiple safety protection and energy-saving charging |
-
2013
- 2013-02-05 CN CN201510009542.XA patent/CN104600797B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201114602Y (en) * | 2007-08-08 | 2008-09-10 | 青岛海信移动通信技术股份有限公司 | Power consumption control circuit applicable to dual working platform and the mobile phone with this circuit |
| CN201222659Y (en) * | 2008-07-11 | 2009-04-15 | 深圳市同洲电子股份有限公司 | Power supply circuit and mobile terminal |
| CN201550190U (en) * | 2009-10-15 | 2010-08-11 | 福建新大陆通信科技有限公司 | Standby circuit for STB |
| CN102097850A (en) * | 2010-12-31 | 2011-06-15 | 东莞市奇立电源有限公司 | Method and device for controlling multiple safety protection and energy-saving charging |
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| CN104600797A (en) | 2015-05-06 |
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