CN109390992A - Battery protection chip, power supply unit and electronic cigarette - Google Patents
Battery protection chip, power supply unit and electronic cigarette Download PDFInfo
- Publication number
- CN109390992A CN109390992A CN201710682497.3A CN201710682497A CN109390992A CN 109390992 A CN109390992 A CN 109390992A CN 201710682497 A CN201710682497 A CN 201710682497A CN 109390992 A CN109390992 A CN 109390992A
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- module
- voltage
- battery
- logic controller
- battery protection
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- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 129
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 26
- 230000001012 protector Effects 0.000 claims description 11
- 230000010355 oscillation Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 230000002265 prevention Effects 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 206010015535 Euphoric mood Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Chemical class CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Protection Of Static Devices (AREA)
Abstract
The present invention relates to a kind of battery protection chip, power supply unit and electronic cigarettes, belong to application of electronic technology field.Battery protection chip includes: mainboard, the logic controller being integrated on mainboard, current monitoring module, voltage monitoring module, short circuit protection module and change-over switch, and mainboard further includes voltage input pin, ground pin and system earth foot；Current monitoring module is connect with logic controller and system earth foot, and voltage monitoring module is connect with logic controller and voltage input pin；Short circuit protection module is connect with logic controller and system earth foot.Change-over switch is connected between ground pin and system earth foot, and logic controller is connect with change-over switch；Logic controller is used to control opening or closing for change-over switch to the testing result of circuit according at least one module in current monitoring module, voltage monitoring module and short circuit protection module.The present invention solves the problems, such as that heat dissipation for circuit board effect is poor.The present invention is used for the battery protection of electronic cigarette.
Description
Technical field
The present invention relates to application of electronic technology field, in particular to a kind of battery protection chip, power supply unit and electronic cigarette.
Background technique
Electronic cigarette is a kind of electronic product for imitating cigarette, can be by means such as atomizations, by cigarette materials such as nicotines
It is sucked after becoming steam for user.
Traditional electronic cigarette is mainly made of atomizer and power supply unit, which includes battery and battery protection mould
Block, the battery are usually lithium battery, which is used to provide charge protection and Cross prevention etc. for battery.
The battery protection module is arranged on circuit boards, generally comprises multiple discrete chips and component, and multiple point
The board area that vertical chip and component occupy is larger, is unfavorable for the heat dissipation of device on circuit board.
Summary of the invention
In order to solve the problems, such as that heat dissipation for circuit board effect is poor, the embodiment of the invention provides a kind of battery protection chips, confession
Electric installation and electronic cigarette.The technical solution is as follows:
According to a first aspect of the embodiments of the present invention, a kind of battery protection chip is provided, comprising:
Mainboard, integrated logic controller on the main board, current monitoring module, voltage monitoring module, short-circuit protection
Module and change-over switch, the mainboard further include voltage input pin, ground pin and system earth foot；
The current monitoring module is connect with the logic controller and the system earth foot respectively, the voltage monitoring
Module is connect with the logic controller and the voltage input pin respectively, the short circuit protection module respectively with the logic
Controller is connected with the system earth foot；
The change-over switch is connected between the ground pin and the system earth foot, the logic controller and institute
State change-over switch connection；
The logic controller is used for according to the current monitoring module, the voltage monitoring module and the short-circuit protection
At least one module in module controls opening or closing for the change-over switch to the testing result of circuit.
Optionally, the current monitoring module includes:
Electric current monitoring modular, over-discharge electric current monitoring modular are overcharged, and overcharges electric current monitoring modular for described in and benchmark is provided
First a reference source of voltage signal and the second a reference source of reference voltage signal is provided for the over-discharge electric current monitoring modular；
The voltage monitoring module includes: overcharged voltage monitoring modular, over-discharge voltage monitoring module, and is overcharged to be described
Voltage monitoring module provides the third a reference source of reference voltage signal and provides reference voltage for the over-discharge voltage monitoring module
4th a reference source of signal；
The short circuit protection module includes:
Short-circuit detecting module, and the 5th a reference source of reference voltage signal is provided for the short-circuit detecting module.
Optionally, the battery protection chip further include:
The current monitoring module includes: to overcharge electric current monitoring modular and over-discharge electric current monitoring modular；
The voltage monitoring module includes: overcharged voltage monitoring modular and over-discharge voltage monitoring module；
The short circuit protection module includes: short-circuit detecting module；
The battery protection chip further include: a reference source, a reference source are used to overcharge electric current monitoring modular, institute to be described
It states over-discharge electric current monitoring modular and the short-circuit detecting module provides the first reference voltage signal, and supervised for the overcharged voltage
It surveys module and the over-discharge voltage monitoring module provides the second reference voltage signal.
Optionally, the battery protection chip further include:
Electrification reset module, the electrification reset module are connect with the logic controller.
Optionally, the battery protection chip further include:
Overheat protector module, the overheat protector module are connect with the logic controller, and the logic controller is used for
According to the temperature detection result of the overheat protector module, opening or closing for the change-over switch is controlled.
Optionally, the battery protection chip further include:
Oscillation module, the oscillation module are connect with the logic controller.
Optionally, the battery protection chip further include: voltage divider, the voltage divider are used to overcharge to be described
Voltage monitoring module and over-discharge voltage monitoring module distribution measurement voltage.
According to a second aspect of the embodiments of the present invention, a kind of power supply unit is provided, the power supply unit includes:
Any battery protection chip of first aspect.
Optionally, the power supply unit further include: charging port, battery, the first current-limiting resistance, filter capacitor and the second limit
Leakage resistance；
The power end of the charging port is connect with the anode of the battery, the ground terminal of the charging port and the electricity
The system earth foot connection of chip is protected in pond, and the charging port is used to charge for the battery, the system earth foot ground connection；
The anode of the battery is connect with the voltage input pin of the battery protection chip, the cathode of the battery and institute
State the ground pin connection on battery protection chip；
The positive of the battery is in series with the first current-limiting resistance between the voltage input pin of the battery protection chip；
The both ends of the filter capacitor are connect with the anode and cathode of the battery respectively；
One end of second current-limiting resistance is connect with the cathode of the battery, other end ground connection.
According to a third aspect of the embodiments of the present invention, a kind of electronic cigarette is provided, the electronic cigarette includes:
The second aspect any power supply unit and atomizer, the power supply unit are used to supply to the atomizer
Electricity.
The technical solution that the embodiment of the present invention provides can include the following benefits:
The embodiment of the invention provides battery protection chip, power supply unit and electronic cigarette, due to by current monitoring module,
Voltage monitoring module and short circuit protection module are integrated in a battery protection chip, can be realized without discrete multiple chips
The function of existing battery protection module reduces the number of chip, consequently reduces compared to conventional batteries protective module
The area for occupying circuit board, improves the radiating efficiency of circuit board.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Invention.
Detailed description of the invention
In order to illustrate more clearly of the embodiment of the present invention, attached drawing needed in embodiment description will be made below
Simply introduce, it should be apparent that, drawings in the following description are only some embodiments of the invention, common for this field
For technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of battery protection chip provided in an embodiment of the present invention.
Fig. 2 is the concrete structure schematic diagram of battery protection chip shown in FIG. 1.
Fig. 3 is the concrete structure schematic diagram of another battery protection chip provided in an embodiment of the present invention.
Fig. 4 is the structural schematic diagram of another battery protection chip provided in an embodiment of the present invention.
Fig. 5 is a kind of structural schematic diagram of electronic cigarette provided in an embodiment of the present invention.
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
Current electronic cigarette is mainly made of atomizer and power supply unit, which includes battery and battery protection mould
Block, the battery are usually lithium battery, which is arranged on circuit boards, in order to realize charge protection and Cross prevention
Etc. multiple functions, battery protection module generally comprise multiple discrete chips, each chip realizes a kind of function, multiple discrete
Chip occupy board area it is larger, be unfavorable for the heat dissipation of device on circuit board.
It is larger in order to solve the board area that chip occupies in power supply unit, cause device heat dissipation effect is poor to ask
Topic, the embodiment of the present invention provide a kind of battery protection chip, which can be realized existing battery protection module
Function, referring to Figure 1, Fig. 1 is a kind of structural schematic diagram of battery protection chip provided in an embodiment of the present invention.The battery is protected
Protecting chip includes:
It is mainboard 10, the logic controller 20 being integrated on mainboard 10, current monitoring module 30, voltage monitoring module 40, short
Road protective module 50 and change-over switch 60, mainboard 10 further include voltage input pin VDD, ground pin GND and system earth foot
(also referred to as mainboard grounding leg) VM.
Current monitoring module 30 is connect with logic controller 20 and system earth foot VM respectively, and voltage monitoring module 40 is distinguished
It is connect with logic controller 20 and voltage input pin VDD, short circuit protection module 50 connects with logic controller 20 and system respectively
Lower margin VM connection.
Wherein, whether the circuit that current monitoring module 30 is used to detect between logic controller 20 and system earth foot VM is sent out
Raw electric current overcharges, i.e., battery fills with electricity and also continuing to charge, alternatively, current monitoring module 30 is for detecting logic control
Whether the circuit between device 20 and system earth foot VM processed occurs electric current over-discharge, i.e. battery-powered time is too long, battery electricity
Flow through low, battery needs to charge at this time；Voltage monitoring module 40 for detect voltage input pin VDD and logic controller 20 it
Between circuit whether occur voltage overshoot charging, i.e., battery fill with electricity also continuing to charge, alternatively, voltage monitoring module 40
Whether the circuit for detecting between voltage input pin VDD and logic controller 20 occurs voltage overshoot electric discharge, i.e. battery supplies
Electric overlong time, cell voltage is too low, and battery needs to charge at this time；Short circuit protection module 50 is for detecting voltage input pin
Whether the circuit between VDD and system earth foot VM occurs short circuit；Change-over switch 60 is connected on ground pin GND and system earth
Between foot VM, logic controller 20 is connect with change-over switch 60, and logic controller 20 is used for according to current monitoring module 30, voltage
At least one module in monitoring modular 40 and short circuit protection module 50 controls opening for change-over switch 60 to the testing result of circuit
It opens or closes.
In the embodiment of the present invention, since current monitoring module, voltage monitoring module and short circuit protection module are integrated in one
In a battery protection chip, the function of existing battery protection module can be realized without discrete multiple chips, compared to biography
System battery protection module, reduces the number of chip, consequently reduces the area for occupying circuit board, improves dissipating for circuit board
The thermal efficiency.
As shown in Fig. 2, Fig. 2 is the concrete structure schematic diagram of battery protection chip shown in FIG. 1, in the battery protection chip
In, current monitoring module 30 includes:
It overcharges electric current monitoring modular 301, over-discharge electric current monitoring modular 302 and is provided to overcharge electric current monitoring modular 301
First a reference source X1 of reference voltage signal and the second a reference source of reference voltage signal is provided for over-discharge electric current monitoring modular 302
X2。
Wherein, overcharge electric current monitoring modular 301 can for a current comparator, the reverse input end of the current comparator with
The VM connection of system earth foot, positive input are connect with the first a reference source X1, and current comparator is in input signal end (i.e. electricity
Flow the reverse input end of comparator) current signal is converted to by resistance circuit by voltage signal, then with the first a reference source
The first reference voltage signal that X1 is provided is compared, when the current potential of normal phase input end is higher than inverting input terminal, in indication circuit
Current value be less than preset first reference current value, current comparator to logic controller 20 export high level；When reverse phase is defeated
The current potential for entering end is higher than normal phase input end, and the current value in indication circuit is greater than preset first reference current value, and electric current compares
Device exports low level to logic controller 20.
Correspondingly, (the current value in indication circuit at this time when current comparator exports high level to logic controller 20
Less than preset first reference current value, that is to say do not occur the case where electric current overcharges), logic controller 20 is according to reception
The high level arrived can control and change-over switch 60 is kept to open, so that the electricity between ground pin GND and system earth foot VM
Road conducting, makes battery enter charge circuit, (the indication circuit at this time when current comparator exports low level to logic controller 20
In current value be greater than preset first reference current value, that is to say the case where electric current overcharges occurred), logic controller
20, according to the low level received, can control the shutdown of change-over switch 60, so that between ground pin GND and system earth foot VM
Circuit shutdown, make battery be detached from charge circuit.
Wherein, over-discharge electric current monitoring modular 302 can be a current comparator, the reverse input end of the current comparator with
The VM connection of system earth foot, positive input are connect with the second a reference source X2, and current comparator is in input signal end (i.e. electricity
Flow the reverse input end of comparator) current signal is converted to by resistance circuit by voltage signal, then with the second a reference source
The second reference voltage signal that X2 is provided is compared, when the current potential of normal phase input end is higher than inverting input terminal, in indication circuit
Current value be less than preset second reference current value, current comparator to logic controller 20 export high level；When reverse phase is defeated
The current potential for entering end is higher than normal phase input end, and the current value in indication circuit is greater than preset second reference current value, and electric current compares
Device exports low level to logic controller 20.
Correspondingly, logic controller 20 is according to receiving when current comparator exports high level to logic controller 20
Low level (current value in indication circuit is greater than preset second reference current value at this time, that is to say that electric current do not occur excessive
The case where electric discharge), it can control and change-over switch 60 is kept to open, so that between ground pin GND and system earth foot VM
Circuit conducting, makes battery enter discharge loop, (indicates electricity at this time when current comparator exports high level to logic controller 20
Current value in road is less than preset second reference current value, that is to say the case where electric current over-discharge occurred), logic control
Device 20 can control the shutdown of change-over switch 60 according to the low level received so that ground pin GND and system earth foot VM it
Between circuit shutdown, make battery be detached from discharge loop.
Optionally, voltage monitoring module 40 includes:
It overcharged voltage monitoring modular 401, over-discharge voltage monitoring module 402 and provides for overcharged voltage monitoring modular 401
The third a reference source X3 of reference voltage signal and the 4th a reference source of reference voltage signal is provided for over-discharge voltage monitoring module 402
X4。
Wherein, overcharged voltage monitoring modular 401 can be a voltage comparator, the reverse input end of the voltage comparator with
Voltage input pin VDD connection, positive input are connect with third a reference source X3, and voltage comparator is by input signal end
The third reference voltage that the voltage signal and third a reference source X3 of (i.e. the reverse input end of the voltage comparator) input provide is believed
It number is compared, when the current potential of normal phase input end is higher than inverting input terminal, voltage comparator exports high electricity to logic controller 20
It is flat；When the current potential of inverting input terminal is higher than normal phase input end, voltage comparator exports low level to logic controller 20.Accordingly
, when voltage comparator exports high level to logic controller 20, (voltage signal in indication circuit is less than preset at this time
Third reference voltage signal that is to say the case where voltage overshoot charging do not occur), logic controller 20 is according to the height electricity received
It is flat, it can control and change-over switch 60 is kept to open, so that the circuit between ground pin GND and system earth foot VM is connected,
Battery is set to access charge circuit, (the electricity in indication circuit at this time when voltage comparator exports low level to logic controller 20
Press signal to be greater than preset third reference voltage signal, that is to say the case where voltage overshoot charging occur), logic controller 20
According to the low level received, the shutdown of change-over switch 60 can control, so that the electricity between ground pin GND and system earth foot VM
Road shutdown, makes battery be detached from charge circuit.
Wherein, over-discharge voltage monitoring module 402 can be a voltage comparator, the reverse input end of the voltage comparator with
Voltage input pin VDD connection, positive input are connect with the 4th a reference source X4, and voltage comparator is by input signal end
The 4th reference voltage that the voltage signal and the 4th a reference source X4 of (i.e. the positive input of the voltage comparator) input provide is believed
It number is compared, when the current potential of normal phase input end is higher than inverting input terminal, voltage comparator exports high electricity to logic controller 20
It is flat；When the current potential of inverting input terminal is higher than normal phase input end, voltage comparator exports low level to logic controller 20.Accordingly
, when voltage comparator exports low level to logic controller 20, (voltage signal in indication circuit is greater than preset at this time
4th reference voltage signal that is to say the case where voltage overshoot electric discharge do not occur), logic controller 20 is according to the height electricity received
It is flat, it can control and change-over switch 60 is kept to open, so that the circuit between ground pin GND and system earth foot VM is connected,
Battery is set to enter discharge loop, (the electricity in indication circuit at this time when voltage comparator exports high level to logic controller 20
Press signal to be less than preset 4th reference voltage signal, that is to say the case where voltage overshoot electric discharge occurred), logic controller 20
According to the low level received, the shutdown of change-over switch 60 can control, so that between ground pin GND and system earth foot VM
Circuit shutdown, makes battery be detached from discharge loop.
Specifically, logic controller 20 controls and change-over switch 60 is kept to open, by ground pipe when being charged
Circuit conducting between foot GND and system earth foot VM, battery enter charge circuit, realize battery charging；When battery is fully charged
Afterwards, cell voltage reaches the first reference voltage (can be voltage rating, such as 4.2V), and logic controller 20, which receives, overcharges electric current
The low level signal that monitoring modular 301 exports, alternatively, logic controller 20 connects when the voltage of battery reaches third reference voltage
The low level signal of the output of overcharged voltage monitoring modular 401 is received, then logic controller 20 controls change-over switch 60 and turns off, battery
It is detached from performance loop, realizes additives for overcharge protection.
When power device needs work, logic controller 20 controls and change-over switch 60 is kept to open, by ground pin
Circuit conducting between GND and system earth foot VM, battery enter performance loop, realize battery discharge, work for power device
Operating voltage is provided, the electricity meeting slow consumption of battery is gradually reduced, when the voltage of battery is less than by voltage rating (such as 4.2V)
When the 4th reference voltage (such as 3V), logic controller 20 receives the high level signal of the output of over-discharge voltage monitoring module 402, or
Person, when the voltage of battery is less than the second reference voltage, logic controller 20 receives the output of over-discharge electric current monitoring modular 302
High level signal, control change-over switch 60 are closed, so that the circuit between ground pin GND and system earth foot VM disconnects, are made
It obtains battery and is detached from discharge loop, realize Cross prevention.
Optionally, short circuit protection module 50 includes:
Short-circuit detecting module 501, and the 5th a reference source X5 of reference voltage signal is provided for short-circuit detecting module 501.
Wherein, short-circuit detecting module 501 can be a current comparator, the reverse input end and system of the current comparator
Grounding leg VM connection, positive input are connect with the 5th a reference source X5, and current comparator is in input signal end (i.e. electric current ratio
Compared with the reverse input end of device) current signal is converted to by resistance circuit by voltage signal, then mentioned with the 5th a reference source X5
The 5th reference voltage signal supplied is compared, when the current potential of normal phase input end is higher than inverting input terminal, the electricity in indication circuit
Flow valuve is less than preset 5th reference current value, and current comparator exports high level to logic controller 20；Work as inverting input terminal
Current potential be higher than normal phase input end, the current value in indication circuit is greater than preset 5th reference current value, current comparator to
Logic controller 20 exports low level.
Correspondingly, (the current value in indication circuit at this time when current comparator exports high level to logic controller 20
Greater than preset 5th reference current value, that is to say do not occur the situation of short circuit), logic controller 20 is according to the low electricity received
It is flat, it can control and change-over switch 60 is kept to open, so that the circuit between ground pin GND and system earth foot VM is connected,
When current comparator exports high level to logic controller 20, (current value in indication circuit is less than preset 5th base at this time
Quasi- current value that is to say the situation of short circuit occurred), logic controller 20 can control conversion according to the low level received
Switch 60 turns off, so that the circuit between ground pin GND and system earth foot VM turns off.
Specifically, load short circuits failure occurs for chip, voltage input pin vdd terminal in the power device course of work
Voltage suddenly drops to the 5th reference voltage signal (such as 2.4V), and short-circuit detecting module 501 detects the voltage die, to logic control
Device 20 processed exports low level control signal, and logic controller 20 controls change-over switch 60 and turns off, and battery is detached from performance loop, real
Short-circuit protection is showed.
In practical application, since logic controller 20 is connect with multiple detection modules, it is likely to be received not in different periods
Same low and high level can integrate at least one in the logic controller 20 to guarantee effective work of logic controller 20
Kind of gate circuit, such as with door or door, NOT gate, NAND gate, nor gate, AND OR NOT gate, XOR gate.Logic controller 20 can in this way
To be carried out by corresponding gate circuit to the level signal that current monitoring module, voltage monitoring module and short circuit protection module input
Processing obtains the signal of control change-over switch.
It should be noted that as shown in figures 2 and 3, above-mentioned battery protection chip can also include: voltage divider 70, electricity
Distributor 70 is pressed to be used for for over-discharge electric current monitoring modular 302 and the distribution measurement voltage of over-discharge voltage monitoring module 402.Voltage distribution
The voltage signal all the way that device 70 can input voltage input pin VDD is converted into two-way voltage signal, and by the two-way of output
Voltage signal inputs over-discharge electric current monitoring modular 302 and over-discharge voltage monitoring module 402 respectively, and two-way voltage signal can be with
Fine tuning provides stable measurement voltage for over-discharge electric current monitoring modular 302 and over-discharge voltage monitoring module 402, so that two-way is electric
Pressure signal is suitble to compare with corresponding reference voltage signal.
It should also be noted that, being with current monitoring module 30, voltage monitoring module 40 and short circuit protection module 50 in Fig. 2
When exporting high level, logic controller 20 is controlled and is illustrated for keeping change-over switch 60 to open, in practical application, electricity
Stream monitoring modular 30, voltage monitoring module 40 and short circuit protection module 50 also can integrate reverser etc., in its low electricity of output
Usually, logic controller 20 controls and change-over switch 60 is kept to open, and Fig. 2 is only schematically illustrated, any enterprising on the basis Fig. 2
Battery protection chip obtained by capable variation should also be covered in the protection scope of the embodiment of the present invention.
In practical application, the first a reference source shown in Fig. 2 to the 5th a reference source can also be replaced otherwise, such as Fig. 4
Shown, battery protection chip further includes an a reference source X, voltage conversion circuit can be set in a reference source X, so that a reference source
One group, two groups or multiple groups reference voltage signal are exported, which may be the same or different, for example, the base
Quasi- source X is used for overcharge electric current monitoring modular 301, and over-discharge electric current monitoring modular 302 and short-circuit detecting module 501 provide the first base
Quasi- voltage signal, and the second reference voltage letter is provided for overcharged voltage monitoring modular 401 and over-discharge voltage monitoring module 402
Number, which can be the same or different with the second reference voltage signal.Optionally, a reference source X
Identical reference voltage signal can be exported, is respectively supplied to overcharge electric current monitoring modular 301, over-discharge electric current monitoring modular 302,
Short-circuit detecting module 501, overcharged voltage monitoring modular 401 and over-discharge voltage monitoring module 402 (i.e. above-mentioned first reference voltage letter
It is number identical as the second reference voltage signal), modules are compared to change with reference voltage signal by respective internal circuit
Compared with voltage value.In practical application, a reference source X can also export 5 groups of different reference voltage signals, be respectively supplied to overcharge
Current monitoring module 301, over-discharge electric current monitoring modular 302, short-circuit detecting module 501, overcharged voltage monitoring modular 401 and over-discharge
Voltage monitoring module 402.Further, which can be provided with timesharing, for example, during the charging process, a reference source is
It overcharges electric current monitoring modular 301 and/or overcharged voltage monitoring modular 401 provides a reference signal, during discharge, benchmark
Source is over-discharge electric current monitoring modular 302 and/or short-circuit detecting module 501 and/or over-discharge voltage monitoring module 402 provide it is another
Reference signal, the embodiment of the present invention are not construed as limiting this.
It is above-mentioned to overcharge electric current monitoring modular 301, over-discharge electric current monitoring modular 302, short-circuit detecting module 501, overcharged voltage
Monitoring modular 401 and over-discharge voltage monitoring module 402 share same a reference source, can reduce the quantity of a reference source in this way, thus
Reduce the circuit complexity in battery protection chip.
It should be noted that change-over switch 60 provided in an embodiment of the present invention can be a transistor, the grid of the transistor
Pole is connect with logic controller 20, and the first pole of the transistor is connect with ground pin GND, and the second pole and system earth foot VM connect
It connects, wherein the first extremely source electrode, second extremely drains；Alternatively, first extremely drains, the second extremely source electrode.The transistor can be with
For N-channel MOS memory (Metal Oxide Semiconductor, MOS) or PMOS.
Further, as shown in figure 4, battery protection chip can also include: electrification reset module 80, overheat protector module
90 and oscillation module 100.
Electrification reset module 80 is connect with logic controller 20.The electrification reset module 80 is used for control logic controller 20
Carry out electrification reset, it is ensured that after for 20 on-load voltage of logic controller, which is initialized to preset
Original state.
Overheat protector module 90 is connect with logic controller 20, and logic controller 20 is used for according to overheat protector module 90
Temperature detection result, control change-over switch 60 open or close.The overheat protector module 90 can be temperature sensor, the mistake
When detecting that the temperature in circuit is greater than preset temperature threshold, (explanation the excessively high feelings of temperature to warm protective module 90 does not occur
Condition), high level is exported to logic controller 20, logic controller 20 can control according to the high level received and keep turning
The unlatching of switch 60 is changed, so that the circuit between ground pin GND and system earth foot VM is connected, which is being examined
It measures when the temperature in circuit is less than preset temperature threshold and (illustrates the excessively high situation of temperature occur), 20 basis of logic controller
The low level received can control the shutdown of change-over switch 60, so that the circuit between ground pin GND and system earth foot VM
Shutdown.
Exemplary, overheat protector module 90 can be diode excess temperature detection circuit, which is utilized diode current flow
The characteristic that voltage declines with the raising of temperature realizes that the diode excess temperature detection circuit may include diode and comparator
Deng.
Oscillation module 100 is connect with logic controller 20.The oscillation module can be oscillating circuit, for generating oscillation electricity
Signal, the electric oscillation signal are a kind of size and Orientations all with period changed electric signal, generally include high level and
Low level, is based on the electric oscillation signal, and the control to change-over switch 60 may be implemented in logic controller 20.
The explanation of value in the embodiment of the present invention, is also possible to be provided in battery protection chip shown in Fig. 1 to Fig. 4
Other electronic components, such as capacitor or resistance, exemplary, current monitoring module 30 and/or short circuit protection module 50 are between VM
Circuit on resistance can be set, the embodiment of the present invention repeats no more this.
In addition, in actual use, traditional battery protection module in order to realize for charge protection and Cross prevention function,
Two 3.3*3.3 square millimeters of (mm are typically at least set2) metal-oxide-semiconductor need at least to be arranged to realize drive control function
One 3*4mm2Driving chip, therefore, these three devices at least occupy mainboard about 34mm2Area.
And in the embodiment of the present invention, charging protecting module, Cross prevention module and short circuit protection module realize fill respectively
Electric protection, Cross prevention and short-circuit protection function, and logic controller realizes drive control function, occupied by these devices
Area be about 4*4=16mm2, far smaller than traditional battery protection module, in current small bar electronic cigarette, mainboard diameter is logical
It is often 16mm, area is about 200mm2, can be effectively reduced using charge protection chip provided in an embodiment of the present invention in mainboard
On area occupied.
In conclusion in the embodiment of the present invention, due to by current monitoring module, voltage monitoring module and short circuit protection module
It is integrated in a battery protection chip, the function of existing battery protection module can be realized without discrete multiple chips,
Compared to conventional batteries protective module, reduce the number of chip, consequently reduces the area for occupying circuit board, improve electricity
The radiating efficiency of road plate.
A kind of power supply unit provided in an embodiment of the present invention, as shown in figure 5, the power supply unit includes: charging port, battery
01, battery protection chip 02, the first current-limiting resistance R1, filter capacitor C and the second current-limiting resistance R2.
The power end of charging port is connect with the anode of battery 01, ground terminal and the battery protection chip 02 of charging port
The VM connection of system earth foot, the charging port are used to charge for battery 01, system earth foot VM ground connection.Wherein, charging port
Anode with battery 01 anode connect, the cathode of charging port is connect with system earth end VM, the system earth end VM be grounded.
The anode of battery 01 is connect with the voltage input pin VDD of battery protection chip 02, the cathode and battery of battery 01
Protect the ground pin GND connection on chip.
The first current-limiting resistance is in series between the voltage input pin VDD of anode and battery 01 the protection chip of battery 01
R1, first current-limiting resistance R1 have the function of current limliting, can be used for the interference signal in filtering circuit, prevent prime electric
Interference of the road to late-class circuit, resistance value can be 100 ohm (R) or 240 Europe (Ω).
The both ends of filter capacitor C are connect with the anode and cathode of battery 01 respectively, and filter capacitor C is used to be battery protection
Chip provides stable operating voltage, and capacitance size can be 0.1 microfarad (μ F).
One end of second current-limiting resistance R2 is connect with the cathode of battery 01, other end ground connection, the second current-limiting resistance R2 tool
The effect of current limiting.
It should be noted that above-mentioned battery protection chip can have multiple pins, Fig. 5 assumes that its pin 3,6,9,12 is
Voltage input pin VDD, pin 1,2,4,5,7,8,10,11 are ground pin GND, and in practical application, pin distribution is also
There can be other modes, the embodiment of the present invention does not repeat them here.
In conclusion the embodiment of the present invention provides a kind of power supply unit, by current monitoring module, voltage in the power supply unit
Monitoring modular and short circuit protection module are integrated in a battery protection chip, can be realized without discrete multiple chips existing
The function of battery protection module reduce the number of chip compared to conventional batteries protective module, consequently reduce occupancy
The area of circuit board improves the radiating efficiency of circuit board.
The embodiment of the invention also provides a kind of electronic cigarette, the electronic cigarette may include power supply unit as shown in Figure 5 with
And atomizer, the power supply unit are used to power to the atomizer.
About the device in above-described embodiment, wherein modules execute the concrete mode of operation in the related battery
It protects and is described in detail in the embodiment of chip, no detailed explanation will be given here.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are wanted by right
It asks and points out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (10)
1. a kind of battery protection chip characterized by comprising
Mainboard, integrated logic controller on the main board, current monitoring module, voltage monitoring module, short circuit protection module
And change-over switch, the mainboard further include voltage input pin, ground pin and system earth foot；
The current monitoring module is connect with the logic controller and the system earth foot respectively, the voltage monitoring module
Connect respectively with the logic controller and the voltage input pin, the short circuit protection module respectively with the logic control
Device is connected with the system earth foot；
The change-over switch is connected between the ground pin and the system earth foot, the logic controller with described turn
Change switch connection；
The logic controller is used for according to the current monitoring module, the voltage monitoring module and the short circuit protection module
In at least one module to the testing result of circuit, control opening or closing for the change-over switch.
2. battery protection chip according to claim 1, which is characterized in that the current monitoring module includes: overcharge
Monitoring modular, over-discharge electric current monitoring modular are flowed, and is first for overcharging electric current monitoring modular and reference voltage signal being provided
A reference source and the second a reference source of reference voltage signal is provided for the over-discharge electric current monitoring modular；
The voltage monitoring module includes: overcharged voltage monitoring modular, over-discharge voltage monitoring module, and is the overcharged voltage
Monitoring modular provides the third a reference source of reference voltage signal and provides reference voltage signal for the over-discharge voltage monitoring module
The 4th a reference source；
The short circuit protection module includes: short-circuit detecting module, and provides reference voltage signal for the short-circuit detecting module
The 5th a reference source.
3. battery protection chip according to claim 1, which is characterized in that
The current monitoring module includes: to overcharge electric current monitoring modular and over-discharge electric current monitoring modular；
The voltage monitoring module includes: overcharged voltage monitoring modular and over-discharge voltage monitoring module；
The short circuit protection module includes: short-circuit detecting module；
The battery protection chip further include: a reference source, a reference source are used to overcharge electric current monitoring modular, the mistake to be described
Discharge stream monitoring modular and the short-circuit detecting module provide the first reference voltage signal, and monitor mould for the overcharged voltage
Block and the over-discharge voltage monitoring module provide the second reference voltage signal.
4. battery protection chip according to any one of claims 1 to 3, which is characterized in that the battery protection chip also wraps
It includes:
Electrification reset module, the electrification reset module are connect with the logic controller.
5. battery protection chip according to any one of claims 1 to 3, which is characterized in that the battery protection chip also wraps
It includes:
Overheat protector module, the overheat protector module are connect with the logic controller, and the logic controller is used for basis
The temperature detection result of the overheat protector module, controls opening or closing for the change-over switch.
6. battery protection chip according to claim 1, which is characterized in that the battery protection chip further include:
Oscillation module, the oscillation module are connect with the logic controller.
7. battery protection chip according to claim 2, which is characterized in that the battery protection chip further include:
Voltage divider, the voltage divider are used for as the overcharged voltage monitoring modular and the over-discharge voltage monitoring module
Distribution measurement voltage.
8. a kind of power supply unit, which is characterized in that the power supply unit includes:
Battery protection chip as described in claim 1 to 7 is any.
9. power supply unit according to claim 8, which is characterized in that the power supply unit further include: charging port, electricity
Pond, the first current-limiting resistance, filter capacitor and the second current-limiting resistance；
The power end of the charging port is connect with the anode of the battery, and the ground terminal of the charging port and the battery are protected
The system earth foot connection of chip is protected, the charging port is used to charge for the battery, the system earth foot ground connection；
The anode of the battery is connect with the voltage input pin of the battery protection chip, the cathode of the battery and the electricity
Protect the ground pin connection on chip in pond；
The positive of the battery is in series with the first current-limiting resistance between the voltage input pin of the battery protection chip；
The both ends of the filter capacitor are connect with the anode and cathode of the battery respectively；
One end of second current-limiting resistance is connect with the cathode of the battery, other end ground connection.
10. a kind of electronic cigarette, which is characterized in that the electronic cigarette includes:
Power supply unit as claimed in claim 8 or 9 and atomizer, the power supply unit are used to power to the atomizer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710682497.3A CN109390992A (en) | 2017-08-10 | 2017-08-10 | Battery protection chip, power supply unit and electronic cigarette |
| PCT/CN2017/115021 WO2019029069A1 (en) | 2017-08-10 | 2017-12-07 | Battery protection chip, power supply device, and electronic cigarette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710682497.3A CN109390992A (en) | 2017-08-10 | 2017-08-10 | Battery protection chip, power supply unit and electronic cigarette |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109390992A true CN109390992A (en) | 2019-02-26 |
Family
ID=65273269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710682497.3A Pending CN109390992A (en) | 2017-08-10 | 2017-08-10 | Battery protection chip, power supply unit and electronic cigarette |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109390992A (en) |
| WO (1) | WO2019029069A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111416406A (en) * | 2020-03-28 | 2020-07-14 | 中国人民解放军96921部队 | Emergency starting power supply |
| CN112271772A (en) * | 2020-10-15 | 2021-01-26 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack, test system and electronic device |
| CN112636308A (en) * | 2020-12-10 | 2021-04-09 | 广州极飞科技有限公司 | Battery short-circuit protection method, device, system, battery and storage medium |
| WO2022042708A1 (en) * | 2020-08-27 | 2022-03-03 | 西安稳先半导体科技有限责任公司 | System-on-chip, battery assembly, electronic device, battery protection circuit, test subsystem, test system, bluetooth earphone, shipping mode setting method, and computer readable storage medium |
| CN114209094A (en) * | 2021-12-30 | 2022-03-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electron cigarette |
| CN114376270A (en) * | 2021-12-30 | 2022-04-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electron cigarette |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113303505B (en) * | 2021-05-19 | 2024-01-12 | 西安稳先半导体科技有限责任公司 | Tobacco stem and electronic cigarette |
| CN113303506B (en) * | 2021-05-19 | 2024-01-12 | 西安稳先半导体科技有限责任公司 | Tobacco stem and electronic cigarette |
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| CN114376270A (en) * | 2021-12-30 | 2022-04-22 | 西安稳先半导体科技有限责任公司 | Battery protection circuit, battery pack and electron cigarette |
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|---|---|
| WO2019029069A1 (en) | 2019-02-14 |
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