CN104600676B - Battery protecting circuit, electric energy provide device and electronic installation - Google Patents
Battery protecting circuit, electric energy provide device and electronic installation Download PDFInfo
- Publication number
- CN104600676B CN104600676B CN201510047589.5A CN201510047589A CN104600676B CN 104600676 B CN104600676 B CN 104600676B CN 201510047589 A CN201510047589 A CN 201510047589A CN 104600676 B CN104600676 B CN 104600676B
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- Prior art keywords
- battery
- chip
- control
- discharge
- protecting circuit
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- 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 provides a kind of battery protecting circuit, electric energy to provide device and electronic installation.The battery protecting circuit, battery is external in, including for providing the battery protection chip of protection control signal for battery, battery protection chip at least has chip positive supply input pin.The battery protecting circuit further comprises：Chip controls switch, and are arranged between chip positive supply input pin and the positive pole of battery, and be configured to controllably in the conduction state or off state；And under chip controls switch is in the conduction state, the positive pole of the chip positive supply input pin connection battery of battery protection chip, battery protection chip is set to start working；Chip controls switch is off under state, and the connection between the chip positive supply input pin of battery protection chip and the positive pole of battery disconnects, and battery protection chip is stopped.Using the solution of the present invention, avoid battery protection chip power consumption and cause battery to be crossed and put, extend battery.
Description
Technical field
The present invention relates to a kind of power protection field, more particularly to a kind of battery protecting circuit, electric energy provide device
With electronic installation.
Background technology
Power supply is the important part of electronic equipment.Rechargeable battery is wherein to use relatively more extensive one kind, at present
The mobile terminals such as smart mobile phone, tablet personal computer use rechargeable battery as power supply mostly.
The characteristics of rechargeable battery, particularly lithium ion battery itself, determine its can not be overcharged, cross put, excessively stream, short circuit
And superhigh temperature discharge and recharge, therefore rechargeable battery generally requires and coordinates battery protecting circuit to use.The protection circuit of rechargeable battery because
The differences such as protection chip and the supply voltage of battery that it is used, circuit and parameter are different, but protection philosophy is similar, often
Secondary battery protective chip includes：Serial, the Japanese MITSUMI of S-8241 of NSK MM3061 series, Taiwan are rich
Brilliant FS312 and FS313 series, the AAT8632 series of Taiwan analogy science and technology, DW01+ etc., its operation principle is similar,
The simply difference on design parameter.
Fig. 1 is the circuit theory diagrams of prior art battery protecting circuit, Fig. 1 more than use can give an account of continue it is any
Secondary battery protective chip, two N-channel MOS pipes of D1 and D2 are as discharge protection switch and charging protection switch, chargeable electricity
Pond exports electric energy from EB+ and EB- both ends.During charging, charge power supply is connected on EB+ and EB- both ends, when the voltage of battery exceedes overvoltage
During threshold value, the Cout pin output signals of battery protection chip turn off D2 N-channel MOS pipe, and rechargeable battery stops charging, prevent
Only rechargeable battery damages because of overcharge.During battery discharge, when the voltage of battery, which was less than, puts threshold value, secondary battery protective core
The Dout pin output signals of piece turn off D1 N-channel MOS pipe, and rechargeable battery stops electric discharge, prevent rechargeable battery from being put because crossing
Electricity and damage.
The Vm pins of other secondary battery protective chip sense input pin for electric current, when discharging rechargeable battery electric current is excessive
When, D1 and D2 conduction voltage drop increase severely, the voltage rise that Vm pins detect, the Dout pins output protection letter of rechargeable battery
Number, D1 and D2 is turned off, prevents rechargeable battery excessively stream or short circuit.
Use above battery protecting circuit can realize the defencive functions such as super-charge super-discharge and the excessively stream of rechargeable battery, effectively
Protection battery avoids damaging because of improper use, but the positive supply input pin Vdd and negative electricity of secondary battery protective chip
Source input pin Vss is connected on the positive pole and negative pole of battery, and battery can be caused still to have under non-powered state
0.1 microampere of power consumption, although power consumption very little, the long term accumulation under without using state, which still results in battery, to be crossed to put and leads
Cause is scrapped.And because existing battery protecting circuit is typically integrated in inside battery, therefore even if by battery taking-up Denso
Postpone idle, still result in battery and cross to put and scrap.
The solution of prior art is that also timing is charged to rechargeable battery in the case of in long-time, with
Prevent rechargeable battery is crossed from putting, so as to cause the inconvenient for use of user.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the battery protecting circuit of problem, electric energy provides device and electronic installation.
The present invention one is further objective is that prevent rechargeable battery from being scrapped after shelving for a long time.
The present invention another further objective is that so that battery protecting circuit Protection parameters set it is more flexible.
The present invention another further objective is that saving the power management cost of outside consuming parts.
According to an aspect of the present invention, the invention provides a kind of battery protecting circuit.The battery protecting circuit, it is external
It is battery protection chip in battery, including for providing protection control signal for battery, battery protection chip at least has chip
Positive supply input pin, further battery protecting circuit also include：Chip controls switch, and are arranged on chip positive supply input pipe
Between pin and the positive pole of battery, and it is configured to controllably in the conduction state or off state；And chip controls switch is in
Under conducting state, chip positive supply input pin connects the positive pole of battery, battery protection chip is worked, at chip controls switch
Under off state, the connection between the chip positive supply input pin of battery protection chip and the positive pole of battery disconnects, and makes electricity
Pond protection chip is stopped.
Alternatively, chip controls switch is electronic switch, including：First connection end, it is configured to be connected with the positive pole of battery,
Second connection end, it is configured to be connected with the chip positive supply input pin of battery protection chip；And control terminal, it is configured to from outside
Receive battery and use signal, and under control of the battery using signal between the connection end of on or off first and second connection end
Connection.
Alternatively, chip controls switch includes：First P-channel metal-oxide-semiconductor, its source electrode are used as the first company of chip controls switch
End is connect, it, which drains, is used as the second connection end of chip controls switch, and its grid is used as the control terminal of chip controls switch；With first
Pull-up resistor, it is connected between the control terminal of chip controls switch and the positive pole of battery.
Alternatively, above-mentioned battery protecting circuit further comprises：Cathode output end and cathode output end, for outwards exporting
The electric energy of battery.
Alternatively, battery protection chip also has control of discharge pin；Battery protection chip further configures at work
Into：When the operating voltage that chip positive supply input pin is got is less than or equal to predetermined overdischarge pressure threshold value, pass through electric discharge
Control pin output prevents the battery from crossing the first protection control signal put, and/or is more than or equal in the discharge current of battery
During default discharging current threshold, the second protection control signal of battery excessively stream is prevented by the output of control of discharge pin.
Alternatively, above-mentioned battery protecting circuit also includes：Discharge control switch, it is connected to positive pole and the positive pole output of battery
Between end, and it is configured to be exported with positive pole according to the positive pole of the first protection control signal or the second protection control signal cut-out battery
The connection at end.
Alternatively, discharge control switch includes：First connection end, it is configured to be connected with the positive pole of battery, second connection end,
It is configured to be connected with cathode output end, and control terminal, it is configured to be connected with control of discharge pin, and first by receiving protects
The second of the first connection end and discharge control switch of shield control signal or the second protection control signal shut-off discharge control switch
Connection between connection end.
Alternatively, discharge control switch includes：Second P-channel metal-oxide-semiconductor, its source electrode are used as the first company of discharge control switch
End is connect, its second connection end as discharge control switch that drains；N-channel MOS pipe, its grid are used as the control of discharge control switch
End processed, the grid of its second P-channel metal-oxide-semiconductor of connection that drains, its source electrode are configured to be connected with cathode output end；Second pull-up electricity
Resistance, is connected between the drain electrode of positive pole and N-channel MOS pipe of battery.
Alternatively, above-mentioned battery protecting circuit also includes：Current detecting part, it is connected to the negative pole of the battery and described
Between cathode output end, and it is configured to detect the discharge current size of battery；Battery protection chip also has electric current sensing input
Pin, electric current sensing input pin are connected with current detecting part.
Alternatively, current detecting part includes：Sampling resistor, one end are connected to the negative pole of battery, and the other end is configured to connect
Connect cathode output end；And electric current sensing input pin is connected with cathode output end, to pass through the voltage drop detection on sampling resistor
The discharge current size of battery.
Alternatively, current detecting part also includes：Current-limiting resistance, it is serially connected with cathode output end and electric current sensing input pin
Between；And capacitor, it is in parallel with current-limiting resistance.
Alternatively, battery protection chip also has charge control pin, and charge control pin is vacantly set.
According to another aspect of the present invention, additionally provide a kind of electric energy and device is provided.The electric energy, which provides device, to be included：Electricity
Pond；Any battery protecting circuit as described above of battery is external in, configuration battery pair provides protection control signal, and
The electric energy of battery is controllably outwards exported by its cathode output end and cathode output end.
Alternatively, battery is Li-Ion rechargeable battery.
According to another aspect of the present invention, a kind of electronic installation is additionally provided.The electronic installation includes consuming parts, and
And further include：Above-mentioned electric energy provides device, is configured to controllably provide electric energy to consuming parts.
Alternatively, above-mentioned electronic installation also includes：Power consumption control device, it is configured to provide the chip control in device to electric energy
System switch provides battery and uses signal, chip controls is switched controllably in the conduction state or off state.
The present invention battery protecting circuit, by battery protection chip chip positive supply input pin and battery just
Chip controls are set to switch between pole, when battery does not work, by between chip positive supply input pin and the positive pole of battery
Electrical connection disconnects, and cuts off the power supply to battery protection chip, avoids due to battery caused by the faint power consumption of battery protection chip
Cross and put, extend the service life of battery, avoid cell damage.
In addition, the battery protecting circuit of the present invention, discharge control switch is arranged at the positive pole and cathode output end of battery
Between mouthful, when battery is not powered, discharge control switch remains open, and can will disconnect the electrical connection of battery and external circuit,
Avoid outside consuming parts and special electric power management circuit is set, save power management cost.
In addition, the battery protecting circuit of the present invention, its current detecting part is arranged at the negative pole and consuming parts of battery
Between ground wire, detection parameters can be flexibly adjustable, it is only necessary to by the resistance for changing its sampling resistor, it is possible to adjustment electric discharge electricity
Threshold value is flowed, improves the flexibility of battery protecting circuit.
Further, since current rechargeable battery is both provided with charge IC (Integrated Circuit, integrated electricity substantially
Road), it is fully able to control the size of charging current by the IC that charges, and prevent from overcharging, therefore, battery protection of the invention electricity
Road, eliminate and overcharge protection, avoid the Redundancy Design of circuit.
In addition, the battery protecting circuit of the present invention, independently sets with battery, it is non-removable to go for battery
Electric energy is provided in device and electronic equipment, is only started when needing power supply, and can directly cut off battery and consuming parts
Electrical connection, when without using battery, it is entirely avoided the power consumption of battery.
According to the accompanying drawings will be brighter to the detailed description of the specific embodiment of the invention, those skilled in the art
Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
Some specific embodiments of the present invention are described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.In the accompanying drawings：
Fig. 1 is the circuit theory diagrams of prior art battery protecting circuit；
Fig. 2 is the schematic block diagram of battery protecting circuit according to an embodiment of the invention；And
Fig. 3 is the circuit theory diagrams of battery protecting circuit according to an embodiment of the invention.
Embodiment
Battery long-time placement for prior art causes service life to reduce the problem of even damaging, by inventor
Analysis and test, find it main reason is that faint power consumption accumulation of the battery protecting circuit during battery is idle, is
Solves this problem, the present embodiment provide firstly a kind of battery protecting circuit.Fig. 2 is according to an embodiment of the invention
The schematic block diagram of battery protecting circuit, as illustrated, the battery protecting circuit includes the He of battery protection chip 120 in general manner
Chip controls switch 110, wherein battery protection chip 120 be used for for battery 100 provide it is various protection control signals (such as cross put
Protection signal and overcurrent protection signal), battery protection chip 120 can be selected according to the voltage and power reguirements of battery,
It is advanced such as it is 2.0V to 3.0V that the S-8241 family chips for the Seiko mentioned in background technology, which provide for overdischarge pressure threshold value,
Unit is 100mV various chips, and the overdischarge of DW01+ chips pressure threshold value is 2.3V.These battery protection chips 120 are at least
With chip positive supply input pin Vdd.The power supply of battery protection chip 120 passes through chip positive supply input pin Vdd
Input, when chip positive supply input pin Vdd non-transformers input, battery protection chip 120 is stopped.
Chip controls switch 110 is arranged between chip positive supply input pin Vdd and the positive pole of battery 100, the chip
Controlling switch 110 can controllably in the conduction state or off state.The negative supply input pin of battery protection chip 120
Vss is connected with the negative pole of battery 100.
The battery protecting circuit of the present embodiment is optionally arranged in the outside of battery, that is, battery protecting circuit and
The battery that the battery protecting circuit is protected independently is set, and battery protecting circuit can be external in battery by interface, just
Battery is obtained from outside in chip controls switch 110 and use signal, and be controllably turned on and off, meet battery fixed setting
Requirement inside electronic installation.
When chip controls switch 110 is in the conduction state, the chip positive supply input pin of battery protection chip 120
Vdd is communicated to the positive pole of battery 100, is the input service power supply of battery protection chip 120, and battery protection chip 120 works, for electricity
Pond 100 provided put, the protection signal such as excessively stream.When chip controls switch 110 is off state, battery protection chip 120
Chip positive supply input pin Vdd and battery 100 positive pole between connection disconnect, chip positive supply input pin Vdd without
Power input so that battery protection chip 120 is stopped, and therefore, will not cause any consumption to the electric energy of battery 100.
The faint power consumption long term accumulation of battery protection chip 120, can cause battery to be crossed and put, and further result in battery use
The lost of life even damages battery.And the battery protecting circuit for using the present embodiment to provide, when battery does not work, disconnect battery
The positive supply input pin Vdd of chip 120 and the positive pole of battery 100 connection are protected, battery protection chip 120 is stopped power consumption, from
And battery 100 is kept electricity, in battery 100 for a long time in the case of, will not because cross put influence battery use the longevity
Life.
In a kind of alternative embodiment, chip controls switch 110 can select electronic switch, and the electronic switch can select
The controllable semiconductor devices such as metal-oxide-semiconductor, transistor, it, which is comprised at least, has：First connection end, second connection end and control terminal.
First connection end of chip controls switch 110 is connected with the positive pole of battery 100, and the second of chip controls switch 110
Connection end is connected with the chip positive supply input pin Vdd of battery protection chip 120.First connection end and second connection end are led
The signal that logical and off state is received by the control terminal of chip controls switch 110 controls.
The control terminal of chip controls switch 110 can be externally controlled port EN reception batteries and use signal.Opened receiving
When the battery that dynamic battery is outwards powered uses signal, the of the control terminal control chip controlling switch 110 of chip controls switch 110
One connection end connects with the second connection end of chip controls switch 110, makes the chip positive supply input pipe of battery protection chip 120
The positive pole of pin Vdd connections battery 100, battery protection chip 120 are powered, and start to perform defencive function.The battery uses letter
Number it can be linked with the starting-up signal of external circuit, such as user generate the electricity for starting battery and outwards powering in start simultaneously
Pond uses signal, battery 100 is powered to battery protection chip 120, and battery protection chip 120 is started working.
Received in the control terminal of chip controls switch 110 and stop battery that outwards powering of battery and use signal or reception
When using signal less than battery, chip controls switch 110 is kept to be off state, to avoid the power consumption of battery protection chip 120.
In an optional embodiment of the present embodiment, the discharge prevention part of battery protection chip 120 is carried out
Improve.As shown in Fig. 2 it is additionally provided with battery protecting circuit：Cathode output end P+ and cathode output end P-, outwards to export institute
State the electric energy of battery.Wherein cathode output end P+ is used for the power line that the positive pole of battery 100 is connected to electrical equipment, and negative pole is defeated
Go out to hold P- to be used for the ground wire that the negative pole of battery 100 is connected to electrical equipment.
The discharge voltage of battery 100 can also be detected by the chip positive supply input pin Vdd of battery protection chip 120.
In the case, between the chip positive supply input pin Vdd of battery protection chip 120 and chip negative supply input pin Vss
Voltage be regarded as the discharge voltage of battery 100.
The control of discharge pin Dout of battery protection chip 120 can believe according to the discharge condition output protection of battery 100
Number.For example, the work that the control of discharge pin Dout of battery protection chip 120 is got in chip positive supply input pin Vdd
When voltage is less than or equal to predetermined overdischarge pressure threshold value, output prevents the battery from crossing the first protection control signal put (i.e.
Put protection control signal).As it was previously stated, above overdischarge pressure threshold value is determined by the model of battery protection chip 120.
In another example the control of discharge pin Dout of battery protection chip 120 can also battery discharge current be more than etc.
When default discharging current threshold, output prevents the second of battery excessively stream to protect control signal (i.e. overcurrent protection control letter
Number).
Therefore, the control of discharge pin Dout of battery protection chip 120 can export when battery discharge occurs abnormal
Put protection control signal and overcurrent protection control signal.
In an optional embodiment of the embodiment of the present invention, put as shown in Fig. 2 battery protecting circuit can also be set
Electric control switch 130.The discharge control switch 130 is connected between the positive pole of battery and cathode output end P+, and is configured to root
According to control of discharge pin Dout output Cross prevention control signal or overcurrent protection control signal cut-out battery 100 positive pole with
Cathode output end P+ connection.That is, in the optional embodiment, when battery discharge occurs abnormal, control of discharge is opened
Closing 130 and disconnecting makes battery 100 stop to externally fed, realizes the protection to battery 100.
Compared with prior art, discharge control switch 130 is arranged at the positive pole of battery 100 to the above-mentioned alternative embodiment of the present invention
With between the cathode output end P+ that outwards powers, at which when state is cut-off, directly cut off the positive pole of battery 100 with it is outside
The connection of consuming parts, repeat to set electric power management circuit without outside consuming parts, save the cost of power management.
In above-mentioned alternative embodiment, the control logic of battery protection chip 120 is：Connected in positive supply input pin Vdd
After the positive pole of battery 100, into working condition, its control of discharge pin Dout inputs control signal connects discharge control switch 130
It is logical, anode 100 is connected cathode output end P+, with normally outwards power supply, put detecting the excessively stream of battery 100 or crossing
When, control of discharge pin Dout input protection control signals disconnect discharge control switch 130, directly cut off the electricity supply 100 with connecting
Logical cathode output end P+ connections, realize the defencive function to battery 100.
Alternatively, discharge control switch 130 can include the first connection end, second connection end and control in general manner
End.First connection end of discharge control switch 130 is connected with the positive pole of battery 100, the second connection end of discharge control switch 130
It is connected with cathode output end P+, the control terminal of discharge control switch 130 is connected with control of discharge pin Dout.Discharge control switch
130 control terminal controls according to the signal received to be located between the first connection end of discharge control switch 130 and the second control terminal
Cross prevention control signal or mistake are received in conducting state or off state, and in the control terminal of discharge control switch 130
During stream protection control signal, the first connection end of discharge control switch 130 and the second control terminal are controlled and are held off.
In chip controls 110 shut-off of switch, the positive supply input pin Vdd of battery protection chip 120 is without input, battery
Protection chip 120 is stopped, and the signal that the control terminal of discharge control switch 130 receives keeps discharge control switch 130 to disconnect,
To cut off all power supplies of battery 100 output.
In an optional battery protecting circuit of the present embodiment, it can also increase and current detecting part 140 is set.The electricity
Stream detection part 140 can detect the discharge current size of battery 100, and sense input to the electric current of battery protection chip 120
Pipe Vm provides voltage signal corresponding with discharge current size.In the battery protecting circuit shown in Fig. 2, current detecting part
140 are connected between the negative pole of battery 100 and cathode output end P-, and the size of discharge current is converted into corresponding voltage letter
Number, there is provided give electric current sensing input pin Vm, for battery protection chip 120 judge battery 100 whether excessively stream.
Compared with carrying out discharge current detection using the conduction voltage drop of metal-oxide-semiconductor in the prior art, the electric current inspection of the present embodiment
The electric current of survey part 140 and the proportionate relationship of voltage are adjustable, so as to adjust the discharging current threshold of battery 100, improve
The flexibility of battery protection.
Fig. 3 is according to the circuit theory diagrams of the battery protecting circuit of an alternative embodiment of the invention, in the optional circuit
In schematic diagram, the cathode circuit symbol of battery 100 is designated as VBAT, and chip U1 is as battery protection chip 120, and the first of chip U1
Pin is control of discharge pin Dout, and the second pin is that electric current senses input pipe Vm, and three-prong is charge control pin Cout,
5th pin is positive supply input pin Vdd, and the 6th pin is negative supply input pin Vss.Negative supply input pin Vss and electricity
The negative pole connection in pond 100.
First electric capacity C1 is parallel to the both ends of battery 100, to filter out ripple, keeps voltage stabilization as decoupling capacitor.The
One P-channel metal-oxide-semiconductor Q1 and the first pull-up resistor R1 compositing chips controlling switch 110, Q1 source electrode are used as chip controls switch 110
The first connection end, Q1 drain electrode is used as the second connection end of chip controls switch 110, and Q1 grid is used as chip controls switch
110 control terminal.R1 is connected between the control terminal of chip controls switch 110 and the positive pole of battery 100.
When battery 100 is not in discharge condition, outside control port EN no signals input or input high level signal.
Because the first pull-up resistor R1 pull-up acts on, Q1 grid is high level, and Q1 drain electrode and source electrode disconnect.Positive supply input pipe
Pin Vdd non-transformers input, and U1 is stopped, so as to not consume any electric energy of battery 100.
When battery 100 is outwards powered, outside control port EN receives low level battery and uses signal (low level
Battery using signal can by external electronic device provide or by one ground connection hand switch provide), Q1 conducting, Q1 drain electrode and
Source electrode connects, and positive supply input pin Vdd is connected to VBAT, and chip U1 works on power.When battery 100 is in discharge condition,
Need to keep outside control port EN to maintain low level.
In the circuit theory diagrams shown in Fig. 3, the second P-channel metal-oxide-semiconductor Q3, N-channel MOS pipe Q2 and the second pull-up resistor
R4 forms discharge control switch 130.Q3 source electrode is used as the first connection end of discharge control switch 130, and connection battery 100 is just
Pole VBAT, Q3 second connection end of the drain electrode as discharge control switch 130, connection cathode output end P+.Q2 grid is used as
The control terminal of discharge control switch 130, connection chip U1 control of discharge pin Dout.Q2 drain electrode connection Q3 grid, Q2
Source electrode connection cathode output end P-.R4 is connected between positive pole VBAT and the Q2 drain electrode of battery 100.
When battery 100 is not outwards powered, chip U1 control of discharge pin Dout is without output, because R4 pull-up is made
With the source electrode and grid for keeping Q3 disconnect.So that kept between the positive pole VBAT and cathode output end P+ of battery 100 disconnected
Open, ensure battery 100 without any power consumption.And then cause under the non-discharged state of battery 100, positive pole and the outside of battery 100
Circuit is without any electrical connection.
In 100 outside normal power supply of battery, chip U1 control of discharge pin Dout output high level, Q2 conductings, its
Source electrode and drain electrode are in the conduction state.It is pulled low so as to Q2 source electrode so that Q3 is turned on.The positive pole VBAT and positive pole of battery 100
It is held between output end P+, battery 100 can be made outwards to power.
In power supply process, detect VBAT voltage less than pre- if there is chip U1 positive supply input pin Vdd
If overdischarge pressure threshold value situation, chip U1 control of discharge pin Dout output low level, Q2 source electrode and drain electrode are in
Off state.Because R4 pull-up acts on, Q3 source electrode and grid be off, so as to battery 100 positive pole VBAT with
Cathode output end P+ disconnects, and has cut off the positive pole of battery 100 and outside electrical connection, has realized the Cross prevention work(to battery 100
Energy.
In the circuit theory diagrams shown in Fig. 3, sampling resistor R2, current-limiting resistance R3, capacitor C2 constitute current detecting
Part 140.Sampling resistor R2 one end is connected to the negative pole of battery, other end connection cathode output end P-.The negative pole stream of battery 100
The electric current entered causes to produce pressure drop on R2.Chip U1 can be by detecting the pressure difference of Vm pins and Vss pins, so that it is determined that battery
100 discharge current.When pressure difference exceedes the predetermined overcurrent detection voltage thresholds of chip U1, chip U1 starts overcurrent protection,
Its control of discharge pin Dout exports low level, and Q2 source electrode and drain electrode turn off.And disconnect Q3's using R4 pull-up effect
Source electrode and grid so that the positive pole VBAT and cathode output end P+ of battery 100 disconnect, and have cut off the positive pole of battery 100 and outside
Electrical connection, realizes the overcurrent protection function to battery 100.
Current-limiting resistance R3 is serially connected between cathode output end P- and chip U1 electric current sensing input pin Vm, capacitor C2
It is in parallel with R3, dash current during failure can be avoided to cause U1 to damage, improve chip U1 reliability.
Because chip U1 predetermined overcurrent detection voltage threshold is fixed value, the conducting pressure of metal-oxide-semiconductor in the prior art
Drop uncontrollable, chip U1 discharging current threshold is nonadjustable.And in the battery protecting circuit of the present embodiment, by changing
Variable sampling resistance R2 resistance can adjustment discharging current threshold, improves the flexibility of battery protecting circuit.
Further, since current rechargeable battery is both provided with the IC (integrated circuit) that charges substantially, by charging, IC is entirely capable of
The size of charging current is enough controlled, and prevents from overcharging, therefore, in order to avoid Redundancy Design, the charging of chips of the embodiment of the present invention
Control pin Cout could be arranged to vacantly.
Battery protecting circuit is external in battery 100, and both can independently be set, and be electrically connected by circuit interface.
Under this setup, compared with rechargeable battery is internally integrated protection circuit in the prior art, battery 100 can be with the present embodiment
Only integrally disposed battery core, battery protecting circuit are arranged at outside battery 100, are easy to battery protecting circuit to be externally controlled port
EN receives low level battery and uses signal.
Circuit theory diagrams shown in Fig. 3 are merely illustrative, and each part can select other controls to patrol in circuit during practical application
Identical part is collected to be replaced, such as PNP transistor can be used to be replaced for P-channel metal-oxide-semiconductor, N-channel MOS pipe can be used
NPN transistor is replaced, and the battery that can protect as needed of physical circuit parameter and device and uses the electricity
The power consumption characteristics of battery-powered consuming parts are flexibly selected.
The present embodiment additionally provides a kind of electric energy and provided in device, including protected battery 100 and above-described embodiment
Any battery protecting circuit introduced.Battery protecting circuit can be set and electrically connect independently of each other with battery 100.The electric energy
The power consumption that battery is all can be avoided when battery is in idle condition by providing device so that battery is placed for a long time, still may be used
To keep original energy state, the service life of battery is improved.And electric energy offer device can pass through its cathode output end
The electric energy of battery is controllably outwards exported with cathode output end, ensures the electric discharge safety of battery.
The electric energy provides device and at least possesses two output ends and an input.Two output ends are battery protecting circuit
Cathode output end P+ and cathode output end P-, outwards controllably to power.One input is outside control port EN, to obtain
Power taking pond uses signal.
The battery 100 that the electric energy of the present embodiment is provided in device can use Li-Ion rechargeable battery, make full use of it
While, have extended cycle life the advantages of bigger than energy, avoided putting damage caused by with excessively stream.
Further, the embodiment of the present invention additionally provides a kind of electronic equipment.The electronic equipment includes consuming parts, and
And device is provided controllably to consuming parts power supply using the electric energy of above example.The cathode output end P+ of battery protecting circuit
The power line of consuming parts can be connected, the cathode output end P- of battery protecting circuit can connect the ground wire of consuming parts.
The electronic equipment can preferably use the structure of non-dismountable battery.With more easily utilization space so that electronics
Equipment is in the case of using same battery capacity, and more frivolous, globality is more preferable.And because electric energy provides device and electricity consumption
Part Integral design, the starting-up signal of consuming parts can be utilized accordingly to generate and provide battery and use signal.
The electronic equipment of the present embodiment further sets power consumption control device, and the power consumption control device is electric to battery protection
The outside control port EN on road provides battery and uses signal, makes the controllably on or off of chip controls switch 110.This is with automatically controlled
Device processed can be hand switch, and sending out low level battery according to the power-on operation of user uses signal.Can at another
Select in embodiment, power consumption control device can link with the starting-up signal of consuming parts.
When consuming parts are closed, power consumption control device is without output or output high level, it is possible to achieve battery is in non-confession
Zero power consumption of electricity condition.When consuming parts are opened, power consumption control device output low level so that battery protection chip starts work
Make, battery is reliably protected under power supply state.
Device and electronic equipment are provided using the battery protecting circuit in above example, electric energy, is realizing battery confession
Defencive function under electricity condition is it is also possible to avoid the faint power consumption of battery protection chip when battery leaves unused.So as to battery
Under state on the shelf for a long time, it still can ensure original state of charge, avoid causes battery to use due to crossing to put
The lost of life is even scrapped.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, still can be direct according to present disclosure without departing from the spirit and scope of the present invention
It is determined that or derive many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognized
It is set to and covers other all these variations or modifications.
Claims (13)
1. a kind of battery protecting circuit, battery is external in, including the battery for providing protection control signal for the battery is protected
Chip is protected, the battery protection chip at least has chip positive supply input pin, it is characterised in that the battery protecting circuit
Also include：
Chip controls switch, be arranged between the chip positive supply input pin and the positive pole of the battery, and be configured to by
Control in the conduction state or off state；And
Under the chip controls switch is in the conduction state, the chip positive supply input pin connects the positive pole of the battery,
The battery protection chip is set to work,
The chip controls switch is off under state, between the chip positive supply input pin and the positive pole of the battery
Connection disconnect, the battery protection chip is stopped；
Cathode output end and cathode output end, for outwards exporting the electric energy of the battery；And
The battery protection chip also has control of discharge pin；The battery protection chip is further configured at work：
When the operating voltage that the chip positive supply input pin is got is less than or equal to predetermined overdischarge pressure threshold value, by described
The output of control of discharge pin prevents the battery from crossing the first protection control signal put；And/or the discharge current in the battery
The second of the battery excessively stream is prevented to protect by the control of discharge pin output during more than or equal to default discharging current threshold
Protect control signal；
Discharge control switch, it is connected between the positive pole of the battery and the cathode output end, and is configured to according to described
One protection control signal or the second protection control signal cut off the connection of the positive pole and the cathode output end of the battery.
2. battery protecting circuit according to claim 1, it is characterised in that the chip controls switch is electronic switch, bag
Include：
First connection end, it is configured to be connected with the positive pole of the battery；
Second connection end, it is configured to be connected with the chip positive supply input pin of the battery protection chip；With
Control terminal, it is configured to use signal, and conducting or pass under control of the battery using signal from external reception battery
Disconnected connection between first connection end and the second connection end.
3. battery protecting circuit according to claim 2, it is characterised in that the chip controls switch includes：
First P-channel metal-oxide-semiconductor, its source electrode are used as the first connection end of chip controls switch, and its drain electrode is used as the chip
The second connection end of controlling switch, its grid are used as the control terminal of chip controls switch；With
First pull-up resistor, it is connected between the control terminal of the chip controls switch and the positive pole of the battery.
4. according to the battery protecting circuit described in claim 1, it is characterised in that the discharge control switch includes：
First connection end, it is configured to be connected with the positive pole of the battery,
Second connection end, it is configured to be connected with the cathode output end, and
Control terminal, be configured to be connected with the control of discharge pin, and by receive it is described first protection control signal or
The second protection control signal turns off the first connection end and the second of the discharge control switch of the discharge control switch
Connection between connection end.
5. battery protecting circuit according to claim 4, it is characterised in that the discharge control switch includes：
Second P-channel metal-oxide-semiconductor, its source electrode are used as the first connection end of the discharge control switch, and its drain electrode is used as the electric discharge
The second connection end of controlling switch；
N-channel MOS pipe, its grid are used as the control terminal of the discharge control switch, and it, which drains, connects the second P-channel MOS
The grid of pipe, its source electrode are configured to be connected with the cathode output end；
Second pull-up resistor, it is connected between the drain electrode of positive pole and the N-channel MOS pipe of the battery.
6. battery protecting circuit according to claim 1, it is characterised in that
The battery protecting circuit also includes：Current detecting part, it is connected to the negative pole of the battery and the cathode output end
Between, and it is configured to detect the discharge current size of the battery；
The battery protection chip also has electric current sensing input pin, the electric current sensing input pin and the current detecting
Part connects.
7. battery protecting circuit according to claim 6, it is characterised in that
The current detecting part includes：Sampling resistor, one end are connected to the negative pole of the battery, and the other end is configured to connect institute
State cathode output end；And
The electric current sensing input pin is connected with the cathode output end, to pass through the voltage drop detection institute on the sampling resistor
State the discharge current size of battery.
8. battery protecting circuit according to claim 7, it is characterised in that the current detecting part also includes：
Current-limiting resistance, it is serially connected between the cathode output end and electric current sensing input pin；With
Capacitor, it is in parallel with the current-limiting resistance.
9. battery protecting circuit according to claim 1, it is characterised in that
The battery protection chip also has charge control pin, and the charge control pin is vacantly set.
10. a kind of electric energy provides device, it is characterised in that including：
Battery；With
The battery protecting circuit as claimed in any one of claims 1-9 wherein of the battery is external in, is configured to the battery
Protection control signal is provided, and the electric energy of the battery is controllably outwards exported by its cathode output end and cathode output end.
11. electric energy according to claim 10 provides device, it is characterised in that
The battery is Li-Ion rechargeable battery.
12. a kind of electronic installation, including consuming parts, it is characterised in that also include：
Electric energy according to claim 10 or 11 provides device, is configured to controllably provide electric energy to the consuming parts.
13. electronic installation according to claim 12, it is characterised in that also include：
Power consumption control device, the chip controls switch for being configured to provide to the electric energy in device provide battery and use signal, make
The chip controls switch controllably in the conduction state or off state.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047589.5A CN104600676B (en) | 2015-01-29 | 2015-01-29 | Battery protecting circuit, electric energy provide device and electronic installation |
| HK15106228.4A HK1205826A1 (en) | 2015-01-29 | 2015-06-30 | Battery protection circuit, electric energy supply device and electronic device |
| PCT/CN2016/072276 WO2016119694A1 (en) | 2015-01-29 | 2016-01-27 | Battery protection circuit, electrical energy providing device and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047589.5A CN104600676B (en) | 2015-01-29 | 2015-01-29 | Battery protecting circuit, electric energy provide device and electronic installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104600676A CN104600676A (en) | 2015-05-06 |
| CN104600676B true CN104600676B (en) | 2018-02-16 |
Family
ID=53126286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510047589.5A Active CN104600676B (en) | 2015-01-29 | 2015-01-29 | Battery protecting circuit, electric energy provide device and electronic installation |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104600676B (en) |
| HK (1) | HK1205826A1 (en) |
| WO (1) | WO2016119694A1 (en) |
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| CN104600676B (en) * | 2015-01-29 | 2018-02-16 | 天地融科技股份有限公司 | Battery protecting circuit, electric energy provide device and electronic installation |
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-
2015
- 2015-01-29 CN CN201510047589.5A patent/CN104600676B/en active Active
- 2015-06-30 HK HK15106228.4A patent/HK1205826A1/en unknown
-
2016
- 2016-01-27 WO PCT/CN2016/072276 patent/WO2016119694A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN104600676A (en) | 2015-05-06 |
| HK1205826A1 (en) | 2015-12-24 |
| WO2016119694A1 (en) | 2016-08-04 |
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