CN206282941U - Novel lithium battery electric power management circuit - Google Patents
Novel lithium battery electric power management circuit Download PDFInfo
- Publication number
- CN206282941U CN206282941U CN201621401154.2U CN201621401154U CN206282941U CN 206282941 U CN206282941 U CN 206282941U CN 201621401154 U CN201621401154 U CN 201621401154U CN 206282941 U CN206282941 U CN 206282941U
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- lithium battery
- resistance
- circuit
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 34
- 230000005611 electricity Effects 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 11
- 230000004224 protection Effects 0.000 claims description 8
- 206010034133 Pathogen resistance Diseases 0.000 claims 1
- 230000006870 function Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of novel lithium battery electric power management circuit, including charging circuit, switching circuit, also include electric quantity acquisition circuit, the electric quantity acquisition circuit includes PIC12F1822 single-chip microcomputers U14, the pin 5 of the U14 is connected by resistance R884 with lithium battery, the pin 3 of the U14 is connected with the base stage of triode Q12, the colelctor electrode of the triode Q12 is connected with the grid of PMOS Q11, emitter stage is connected with common port, the grid of the PMOS Q11 is connected by resistance R874 with source electrode, the PMOS Q11 is connected with MCU power supplys, the drain electrode of the Q11 is connected with system power supply.The utility model lithium battery power management circuits have stablizes defencive function, battery temperature can be monitored and be protected, and its cut-in voltage is small, and conducting resistance is small, and loss is low, and switch speed is fast, practical.
Description
Technical field
The utility model is related to electric power management circuit field, espespecially a kind of novel lithium battery electric power management circuit.
Background technology
With the development of electronic technology, the electronic product of portability and cruise-ability is more and more extensive.Using lithium battery
More and more, lithium ion battery energy density is big, and average output voltage is high, and self discharge is small, does not have memory effect, operating temperature model
Enclose a width of -20 DEG C~60 DEG C, cycle performance is superior, can fast charging and discharging, charge efficiency be up to 100%, and output power,
Long service life, without poisonous and harmful substance, is referred to as green battery.Lithium battery power management circuits are lithium battery management systems
In for detecting and managing the management circuit of charging and discharging lithium battery, put so as to prevent over-charging of battery or cross, it is ensured that the peace of lithium battery
Use entirely.The structure practicality of charging circuit and switching circuit in lithium battery power management circuits, is the one of the art
Individual main points.But the switch speed of existing charging circuit and switching circuit is slow, electric power detection needs to be managed with special PMIC
Reason detection, and conduction voltage drop in circuit is than larger.
Utility model content
To solve the above problems, the utility model provides one kind, and can be switched fast the pressure drop of powering of power supply circuit, battery small
With the novel lithium battery electric power management circuit that can monitor battery electric quantity.
To achieve the above object, the technical solution adopted in the utility model is：A kind of novel lithium battery electric power management circuit,
Including charging circuit, switching circuit, the charging circuit is charged using USB connector, and the charging circuit includes
The pin 4 of AP5057 chips U16, the U16 is connected with the 5V power voltage input terminals of USB connector, also by electric capacity C871
It is connected with common port, the pin 4 of the U16 is connected by resistance R867 with the pin 8 of U16, the pin 8 of the U16 is by electricity
Resistance R905 is connected with common port, and the pin 4 of the U16 is also connected by resistance R866 with the pin 1 of U16, the pin of the U16
1 is connected with thermistor NTC, is also connected with common port by resistance R864, and the pin 2 of the U16 is by resistance R869 and public affairs
End connection altogether, the pin 5 of the U16 is connected with the positive pole of lithium battery, is also connected with common port by electric capacity C866, the U16
Pin 6 and the open-drain output of pin 7, drain and the lithium electricity of the switching circuit including AM7321PMOS pipes Q5, the metal-oxide-semiconductor Q5
The positive pole connection in pond, grid level is connected with 5V voltages, and source class is connected with the negative pole of diode D17, the diode D17 positive poles and 5V
Voltage is connected, and the source class of the metal-oxide-semiconductor Q5 is connected with MCU power supplys, is also connected with common port by electric capacity C862；
Also include electric quantity acquisition circuit, the electric quantity acquisition circuit includes PIC12F1822 single-chip microcomputers U14, the U14's
Pin 1 is connected with the LDO circuit output end of system, and the pin 2 of the U14 is bonded with external power source and connects, the pin 5 of the U14
It is connected with lithium battery by resistance R884, is also connected with common port by resistance R885, pin 6 and the external LED of the U14 refers to
Show that lamp is connected, the pin 7 of the U14 is connected with system master chip, and the pin 3 of the U14 is connected with the base stage of triode Q12,
The colelctor electrode of the triode Q12 is connected with the grid of PMOS Q11, and emitter stage is connected with common port, the PMOS Q11's
Grid is connected by resistance R874 with source electrode, is also connected with common port by electric capacity C863, the PMOS Q11 and MCU power supplys
Connection, the drain electrode of the Q11 is connected with system power supply.
Specifically, the USB connector is connected with ESD diode, and electrostatic protection is carried out by ESD diode.
Specifically, the pin 6 of the U16 is connected with external charging indicator lamp, pin 7 and the external charging shape of the U16
State indicator lamp is connected.
Specifically, the LDO circuit includes SGM2021 voltage-stablizers U15, and the U15 inputs are connected with MCU power supplys, also
It is connected with common port by electric capacity C878, the U15 output ends are connected with the pin of U14, also by electric capacity C877 and common port
Connection.
The beneficial effects of the utility model are：The utility model lithium battery power management circuits include charging circuit, cut
Circuit and electric quantity acquisition circuit are changed, wherein, charging circuit uses AP5057 chips, with stablizing defencive function, its pin 1 and heat
Quick resistance NTC, can be monitored and protect to battery temperature；Switching circuit is managed using AM7321PMOS, and its cut-in voltage is small,
Conducting resistance is small, so that circuit turn-on pressure drop is small, loss is low, and switch speed is fast；Used in circuit Acquisition Circuit
PIC12F1822 single-chip microcomputers, can carry out monitor in real time to battery electric quantity, when cell voltage is less than preset value, can charge closing
Circuit, with under-voltage protection function, it is ensured that battery, simple structure is practical.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model charging circuit.
Fig. 2 is the utility model switching circuit and electric quantity acquisition circuit diagram.
Drawing reference numeral explanation：1. charging circuit；2. switching circuit；3. electric quantity acquisition circuit.
Specific embodiment
Refer to shown in Fig. 1-2, the utility model is on a kind of novel lithium battery electric power management circuit, including charging circuit
1st, switching circuit 2, the charging circuit 1 is charged using USB connector, and the charging circuit 1 includes AP5057 chips
The pin 4 of U16, the U16 is connected with the 5V power voltage input terminals of USB connector, is also connected by electric capacity C871 and common port
Connect, the pin 4 of the U16 is connected by resistance R867 with the pin 8 of U16, the pin 8 of the U16 is by resistance R905 and public affairs
End connection altogether, the pin 4 of the U16 is also connected by resistance R866 with the pin 1 of U16, pin 1 and the temperature-sensitive electricity of the U16
Resistance NTC connections, are also connected by resistance R864 with common port, and the pin 2 of the U16 is connected by resistance R869 with common port,
The pin 5 of the U16 is connected with the positive pole of lithium battery, is also connected with common port by electric capacity C866, the He of pin 6 of the U16
The open-drain output of pin 7, the switching circuit 2 includes AM7321PMOS pipes Q5, the drain of the metal-oxide-semiconductor Q5 and the positive pole of lithium battery
Connection, grid level is connected with 5V voltages, and source class is connected with the negative pole of diode D17, and the diode D17 positive poles connect with 5V voltages
Connect, the source class of the metal-oxide-semiconductor Q5 is connected with MCU power supplys, is also connected with common port by electric capacity C862；
Also include electric quantity acquisition circuit 3, the circuit Acquisition Circuit 3 includes PIC12F1822 single-chip microcomputers U14, the U14
Pin 1 be connected with the LDO circuit output end of system, the pin 2 of the U14 is bonded with external power source and connects, the pin of the U14
5 are connected by resistance R884 with lithium battery, are also connected with common port by resistance R885, the pin 6 and external LED of the U14
Indicator lamp is connected, and the pin 7 of the U14 is connected with system master chip, and the pin 3 of the U14 connects with the base stage of triode Q12
Connect, the colelctor electrode of the triode Q12 is connected with the grid of PMOS Q11, and emitter stage is connected with common port, the PMOS
The grid of Q11 is connected by resistance R874 with source electrode, is also connected with common port by electric capacity C863, the PMOS Q11 and MCU
Power supply is connected, and the drain electrode of the Q11 is connected with system power supply.
Compared with prior art, the utility model lithium battery power management circuits include charging circuit 1, the and of switching circuit 2
Electric quantity acquisition circuit 3, wherein, charging circuit 1 uses AP5057 chips, with stablizing defencive function, its pin 1 and thermistor
NTC, can be monitored and protect to battery temperature；Switching circuit 2 is managed using AM7321PMOS, and its cut-in voltage is small, conducting
Resistance is small, so that circuit turn-on pressure drop is small, loss is low, and switch speed is fast；PIC12F1822 is used in circuit Acquisition Circuit 3
Single-chip microcomputer, can carry out monitor in real time to battery electric quantity, and when cell voltage is less than preset value, meeting charge closing circuit has
Under-voltage protection function, it is ensured that battery, simple structure is practical.
Specifically, the USB connector is connected with ESD diode, and electrostatic protection is carried out by ESD diode.
Specifically, the pin 6 of the U16 is connected with external charging indicator lamp, pin 7 and the external charging shape of the U16
State indicator lamp is connected.
Specifically, the LDO circuit includes SGM2021 voltage-stablizers U15, and the U15 inputs are connected with MCU power supplys, also
It is connected with common port by electric capacity C878, the U15 output ends are connected with the pin of U14, also by electric capacity C877 and common port
Connection.
The utility model is described further below by specific embodiment.
This specific embodiment lithium battery power management circuits are by 3 groups of charging circuit 1, switching circuit 2 and electric quantity acquisition circuit
Into wherein charging circuit 1 is charged using USB connector, and uses ESD electrostatic protections, the present embodiment to fill USB connector
Circuit 1 uses AP5057 chip U16, and maximum provides the charging current of 1A, with temperature protection function.Its chips U16 draws
4 points of two-way of pin, are connected with the 5V power voltage input terminals of USB connector all the way, by the Enable Pin pin of resistance R867 and U16
8 connections, the another of U16 pins 4 leads up to resistance R866 and is connected with the pin 1 of U16, pin 1 and the thermistor NTC companies of U16
Connect, carry out temperature detection, the pin 2 of U16 is connected by resistance R869 with common port, can adjust the size of charging current, U16
Pin 5 be connected with the positive pole of lithium battery, the pin 6 and the open-drain output of pin 7 of U16, the function of pin 6 and pin 7 is used as standby
With, wherein, pin 6 connects drawing charging indicator light and represents whether charging is full of, and pin 7 connects drawing charge status indicating light and represents and fills
Electricity condition.
Switching circuit 2 uses AM7321PMOS pipe Q5, and its cut-in voltage is small, and supply current is big, and conducting resistance is small, is opening
When voltage is -4V, conducting resistance 14m Ω, so the conduction voltage drop of circuit is small, are lost low.Wherein, the drain of metal-oxide-semiconductor Q5
Be connected with the positive pole of lithium battery, grid level be connected with 5V voltages, source class is connected with the negative pole of diode D17, diode D17 positive poles and
5V voltages are connected, and the source class of metal-oxide-semiconductor Q5 is connected with MCU power supplys, is also connected with common port by electric capacity C862, specific embodiment
It is that, in the case where there is 5V to power, due to the pressure drop of 5V control sources and diode D17, the Vgs of metal-oxide-semiconductor Q5 is more than 0V, 5V electricity
Source is directly by diode D17 to system power supply.In the case of no 5V control sources, the G poles power supply of metal-oxide-semiconductor Q5 becomes
0V, S grade of voltage becomes cell voltage due to internal body diodes effect, now by cell voltage to system power supply, therefore uses
The switching circuit of the metal-oxide-semiconductor of the model has the advantages that switch speed is fast, pressure drop is small.
Electric quantity acquisition circuit 3 uses 8 single-chip microcomputer U14 of model PIC12F1822, and its major function is to battery
Electricity carries out monitor in real time, while system master chip is fed back to, when cell voltage is less than certain value, can charge closing electricity
Road, under-voltage protection is carried out to battery, prevents from putting, and the service life of battery is lost.Wherein, the LDO of the pin 1 of U14 and system
Circuit output end is connected, and the pin 2 of U14 is bonded with external power source and connects, and mono- low electricity of single-chip microcomputer U14 can be given by external power source key
It is flat；The pin 5 of U14 is connected by resistance R884 with lithium battery, is also connected with common port by resistance R885, carries out AD samplings；
The pin 6 of U14 is connected with external LED indicator lamp, is used to refer to voltage status；The pin 7 of U14 is connected with system master chip, hair
Data are sent to system, to show electricity.And the pin 3 of U14 controls leading for PMOS Q11 by a NPN triode Q1 2
It is logical, so that the power supply of control system；The pin 3 of U14 is connected with the base stage of triode Q12, the colelctor electrode and PMOS of triode Q12
The grid connection of pipe Q11, emitter stage is connected with common port, and the grid of PMOS Q11 is connected by resistance R874 with source electrode, is also led to
Cross electric capacity C863 to be connected with common port, PMOS Q11 is connected with MCU power supplys, the drain electrode of Q11 is connected with system power supply.Its is specific
Implementation method is, when the pin 5 of U14 is less than the value of regulation by the voltage that AD is collected, the output of pin 3 one can be driven low
Level to triode Q12 base stage, due to Vbe light rain cut-in voltages, so NPN triode Q1 2 is not turned on, and PMOS Q11
Grid as drain voltage, Vgs be less than cut-in voltage, then PMOS Q11 be not turned on, main system stop charge, with protect
Demonstrate,prove the service life of battery.Only battery is charged when reinserting USB connector, and when being charged to certain value, led to
The collection voltages size of pin 5 of U14 is crossed, drives pin 3 to export a high level so that NPN triode Q1 2 is turned on, so that
The grid voltage for obtaining PMOS Q11 is almost nil, PMOS conducting, is powered to main system, and whole system is normally run.
Embodiment of above is only that preferred embodiment of the present utility model is described, not to the utility model
Scope be defined, on the premise of the utility model design spirit is not departed from, this area ordinary skill technical staff to this
Various modifications and improvement that the technical scheme of utility model is made, all should fall into the guarantor that claims of the present utility model determine
In the range of shield.
Claims (4)
1. a kind of novel lithium battery electric power management circuit, including charging circuit, switching circuit, it is characterised in that：The electricity that charges
Road is charged using USB connector, and the charging circuit includes that the pin 4 of AP5057 chips U16, the U16 is connected with USB
The 5V power voltage input terminals connection of device, is also connected by electric capacity C871 with common port, and the pin 4 of the U16 passes through resistance
R867 is connected with the pin 8 of U16, and the pin 8 of the U16 is connected by resistance R905 with common port, and the pin 4 of the U16 is also
Be connected with the pin 1 of U16 by resistance R866, the pin 1 of the U16 is connected with thermistor NTC, also by resistance R864 with
Common port is connected, and the pin 2 of the U16 is connected by resistance R869 with common port, and the pin 5 of the U16 is with lithium battery just
Pole connects, and is also connected with common port by electric capacity C866, the pin 6 and the open-drain output of pin 7 of the U16, the switching circuit
Including AM7321PMOS pipes Q5, the drain of the metal-oxide-semiconductor Q5 is connected with the positive pole of lithium battery, and grid level is connected with 5V voltages, source class
Negative pole with diode D17 is connected, and the diode D17 positive poles are connected with 5V voltages, source class and the MCU electricity of the metal-oxide-semiconductor Q5
Source connects, and is also connected with common port by electric capacity C862；
Also include electric quantity acquisition circuit, the electric quantity acquisition circuit includes the pin 1 of PIC12F1822 single-chip microcomputers U14, the U14
It is connected with the LDO circuit output end of system, the pin 2 of the U14 is bonded with external power source and connects, the pin 5 of the U14 is by electricity
Resistance R884 is connected with lithium battery, is also connected with common port by resistance R885, and pin 6 and the external LED indicator lamp of the U14 connect
Connect, the pin 7 of the U14 is connected with system master chip, the pin 3 of the U14 is connected with the base stage of triode Q12, described three
The colelctor electrode of pole pipe Q12 is connected with the grid of PMOS Q11, and emitter stage is connected with common port, and the grid of the PMOS Q11 leads to
Cross resistance R874 to be connected with source electrode, be also connected with common port by electric capacity C863, the PMOS Q11 is connected with MCU power supplys, institute
The drain electrode for stating Q11 is connected with system power supply.
2. a kind of novel lithium battery electric power management circuit according to claim 1, it is characterised in that：The USB connector
It is connected with ESD diode, electrostatic protection is carried out by ESD diode.
3. a kind of novel lithium battery electric power management circuit according to claim 1, it is characterised in that：The pin 6 of the U16
It is connected with external charging indicator lamp, the pin 7 of the U16 is connected with external charging status indicator lamp.
4. a kind of novel lithium battery electric power management circuit according to claim 1, it is characterised in that：The LDO circuit bag
SGM2021 voltage-stablizers U15 is included, the U15 inputs are connected with MCU power supplys, are also connected with common port by electric capacity C878, described
U15 output ends are connected with the pin of U14, are also connected with common port by electric capacity C877.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401154.2U CN206282941U (en) | 2016-12-20 | 2016-12-20 | Novel lithium battery electric power management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401154.2U CN206282941U (en) | 2016-12-20 | 2016-12-20 | Novel lithium battery electric power management circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206282941U true CN206282941U (en) | 2017-06-27 |
Family
ID=59073799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621401154.2U Withdrawn - After Issue CN206282941U (en) | 2016-12-20 | 2016-12-20 | Novel lithium battery electric power management circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206282941U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186864A (en) * | 2020-12-02 | 2021-01-05 | 山东华全动力股份有限公司 | Lithium battery management system |
-
2016
- 2016-12-20 CN CN201621401154.2U patent/CN206282941U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186864A (en) * | 2020-12-02 | 2021-01-05 | 山东华全动力股份有限公司 | Lithium battery management system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170627 Effective date of abandoning: 20230321 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170627 Effective date of abandoning: 20230321 |