CN106655363A - Single chip microcomputer-based multifunctional smart battery charging system - Google Patents
Single chip microcomputer-based multifunctional smart battery charging system Download PDFInfo
- Publication number
- CN106655363A CN106655363A CN201611124411.7A CN201611124411A CN106655363A CN 106655363 A CN106655363 A CN 106655363A CN 201611124411 A CN201611124411 A CN 201611124411A CN 106655363 A CN106655363 A CN 106655363A
- Authority
- CN
- China
- Prior art keywords
- battery
- chip microcomputer
- voltage
- charging
- based multifunctional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/30—Charge provided using DC bus or data bus of a computer
Abstract
The invention provides a single chip microcomputer-based multifunctional smart battery charging system. According to the system, all controls are achieved only by a single chip microcomputer; and the single chip microcomputer is taken as a charger, charging information is obtained from a battery and a main engine by using a bus and accurate control on charging voltage and charging current is achieved through a single-end/differential ADC and on-chip voltage reference integrated into the single chip microcomputer. According to the single chip microcomputer-based multifunctional smart battery charging system, by adopting the single chip microcomputer control, the design is simple; multiple standard interfaces are provided, so that management application of the smart battery is wider, the logic is simplified, the design difficulty is lowered and the complexity of the system is reduced.
Description
Technical field
The present invention relates to a kind of intelligent battery charging system, in particular it relates to a kind of be based on single-chip microcomputer
The multifunctional intellectual batter-charghing system of (Microcontroller Unit, MCU).
Background technology
Lithium ion battery so that operating voltage is high, the good characteristic such as energy density is big, self-discharge rate is little, in mobile phone, notebook
Computer market, it has replaced completely other batteries, has possessed 100% occupation rate;But lithium ion battery to the voltage of itself very
Sensitivity, overcharges or crosses to put and all can affect its normal work.Therefore, it is safe and reliable, fast and efficiently lithium battery charger is to lithium
The performance of battery and application have vital effect.
Lithium ion battery is disadvantageous in that the requirement to charger is harsher, and the requirement to protection circuit is higher.
For effectively utilizes battery capacity, lithium ion battery need to be charged to maximum voltage, but overvoltage is charged and can cause cell damage, this
Require higher charging accuracy (precision is higher than 1%).In addition, needing to carry out preliminary filling to crossing the battery put.In addition it is also necessary to
Other householder methods improve its reliability, such as detection battery temperature, detection charging current etc..Therefore, high accuracy, a Gao Ke
It is particularly important by the lithium battery charging circuit of property.
Lithium ion battery is just extending into rapidly electric tool, electronic with the advantage such as high-energy-density, small volume, lightweight
In bicycle and other applications, its wide market prospects also increasingly obtains the approval of industry.But with ni-mh, NI-G,
Lead-acid battery is compared, and quickly to promote the application and development of lithium ion battery, must just be improved constantly its security and be made
Use the life-span.
The content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of SCM Based multifunctional intellectual battery
Charging system, is controlled using single-chip, and design is simple, there is provided multiple standards interface, makes the management application of intelligent battery wider
It is general, logic is simplified, reduce the difficulty of design and the complexity of system.
To reach above-mentioned purpose, the technical solution adopted in the present invention is as follows:
A kind of SCM Based multifunctional intellectual batter-charghing system, only with all controls of chip microcontroller, with
Single-chip microcomputer obtains charge information as charger using bus from battery and main frame, by single-chip microcomputer be internally integrated it is single-ended/poor
Voltage reference in ADC and piece is divided to realize to charging voltage, the precise control of electric current.
The bus includes SMBus, I2Any one or more type in C, USB, UART or SPI.
The bus can be customized according to the particular/special requirement of user.
The single-chip microcomputer is using C8051FXXX series integrated circuits.
The single-chip microcomputer has been internally integrated including tetra- ADC input pins of AD0-AD3, and power electricity is connected between AD0, AD1
R1 is hindered, and R1 is connected in bus, connects power resistor R2, and R2 one end connection battery between AD2, AD3, by four ADC
Input pin realizes the high-precision analog sampling to four points, and voltage reference obtains the precise voltage of each point in bonding pad.
The P1 mouths of the single-chip microcomputer are connected with the MOSFET pipe M0 being connected in bus, two on single-chip microcomputer pulsewidth modulation
Connect MOSFET pipe M1 and M2 respectively on mouth PWM1, PWM2, wherein, M1 and M2 connects, and is connected by R1 between M0 and M1, passes through
Detection to power resistor R1 two ends, obtains input voltage and input current, so as to need to adjust the switch frequency of M0 according to application
Rate;By the detection to power resistor R2 two ends, the voltage and charging current at battery two ends are obtained, so as to what is needed according to battery
Charging/discharging voltage, electric current adjust the pulsewidth of PWM1, PWM2, realize the precise control to two MOSFET of M1, M2.
The system adopts constant-current constant-voltage charging method, and line precharge is entered using less current versus cell at the charging initial stage,
Battery to occurring putting is repaired and protected, and then battery is charged using larger constant current, realizes quick charge
Purpose;Finally adopt constant-potential charge, it is ensured that battery is full of.
Compared with prior art, the present invention has following beneficial effect:
One, whole system is controlled using single-chip, simplifies system design, saves cost;
Two, the system except providing in addition to SMBus interfaces are connected with existing charging chip, battery, may also provide USB, UART,
The standard interfaces such as SPI, enhance the accommodation of system, thus, have good value for applications.
Description of the drawings
The detailed description by reading non-limiting example made with reference to the following drawings, the further feature of the present invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the circuit theory diagrams of one embodiment of the invention.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, some changes and improvements can also be made.These belong to the present invention
Protection domain.
The embodiment of the present invention employs the C8051FXXX series integrated circuits of Silicon Laboratories companies, complete
Fully integrated mixed signal on-chip system type MCU.Microcontroller core with high speed, 8051 compatibilities of pipeline organization, 10
Position 200ksps single-ended/difference ADC, in piece voltage reference and and temperature sensor, hard-wired SMBus/I2C, enhancement mode
UART (most two) and Enhanced SPI serial line interface, USB (USB) function control device etc..
As shown in figure 1, the present invention is made up of C8051FXXX series monolithics as master controller, single-chip microcomputer is electric with intelligence
Connected by SMBus (System Manager Bus, System Management Bus) bus between pond, intelligence is obtained by SMBus buses
The information of energy battery, such as battery charging voltage, charging current, battery temperature, battery electric quantity;Simultaneously single-chip microcomputer can provide abundant
Standard interface (SMBus, I2C, USB, UART, SPI etc.) be connected with host computer so that host computer can be obtained by multiple interfaces
Current battery information is taken, while various customization functions can be realized.
Lithium ion battery has higher requirement to the voltage and current for charging.The present invention be internally integrated using single-chip microcomputer 10
Voltage reference is realized to charging voltage, the precise control of electric current in single-ended/difference ADC and piece of position 200ksps.The side of implementing
Method is as shown in Figure 1.AD0-AD3 is 4 ADC input pins, and R1, R2 are power resistor.Realized to 4 by 4 ADC input pins
The high-precision analog sampling of individual point, gathers the precise voltage that voltage reference in piece obtains each point.
By the control to MOSFET in Fig. 1, charging voltage and charging current can be controlled.Concrete methods of realizing is:Root
According to the detection to power resistor R1 two ends, input voltage and input current can be obtained, so as to need to adjust M0's according to application
Switching frequency.By the detection to power resistor R2 two ends, the voltage and charging current at battery two ends can be obtained, so as to basis
Charging/discharging voltage, the pulsewidth of electric current adjustment PWM1, PWM2 that battery needs, realize the precise control to two MOSFET of M1, M2.
The present invention selects constant-current constant-voltage charging method, i.e., enter line precharge using less current versus cell at the charging initial stage,
Battery to occurring putting is repaired and protected, and then battery is charged using larger constant current, realizes quick charge
Purpose;Finally adopt constant-potential charge, it is ensured that battery is full of.
A kind of SCM Based multifunctional intellectual batter-charghing system that the present invention is provided, is mainly made up of single-chip microcomputer.
Single-chip microcomputer is obtained as charger utilizing SMBus (System Manager Bus, System Management Bus) bus from battery and main frame
Charge information is taken, operation life can be obtained by polytype bus and main-machine communications such as SMBus, I2C, USB, UART, SPI
Charge information is fed back in order.Present invention uses unique controller-single-chip microcomputer, eliminates traditional battery and charges
Managing chip, while enriching interface function, improves existing battery charging management chip single communication interface (SMBus)
Shortcoming, increased the range of application of design.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can within the scope of the claims make a variety of changes or change, this not shadow
Ring the flesh and blood of the present invention.In the case where not conflicting, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (7)
1. a kind of SCM Based multifunctional intellectual batter-charghing system, it is characterised in that the system is only with a monolithic
Machine realizes all controls, using single-chip microcomputer as charger, charge information is obtained from battery and main frame using bus, by single-chip microcomputer
Voltage reference is realized to charging voltage, the precise control of electric current in single-ended/difference ADC being internally integrated and piece.
2. SCM Based multifunctional intellectual batter-charghing system according to claim 1, it is characterised in that described total
Line includes SMBus, I2Any one or more type in C, USB, UART or SPI.
3. SCM Based multifunctional intellectual batter-charghing system according to claim 1, it is characterised in that described total
Line can be customized according to the particular/special requirement of user.
4. SCM Based multifunctional intellectual batter-charghing system according to claim 1, it is characterised in that the list
Piece machine is using C8051FXXX series integrated circuits.
5. SCM Based multifunctional intellectual batter-charghing system according to claim 4, it is characterised in that the list
Piece machine has been internally integrated including tetra- ADC input pins of AD0-AD3, and power resistor R1 is connected between AD0, AD1, and R1 is connected to
Connect power resistor R2, and R2 one end connection battery in bus, between AD2, AD3, realized to four by four ADC input pins
The high-precision analog sampling of individual point, voltage reference obtains the precise voltage of each point in bonding pad.
6. SCM Based multifunctional intellectual batter-charghing system according to claim 5, it is characterised in that the list
The P1 mouths of piece machine are connected with the MOSFET pipe M0 being connected in bus, on two on single-chip microcomputer pulsewidth modulation mouth PWM1, PWM2
Connect MOSFET pipe M1 and M2 respectively, wherein, M1 and M2 connects, and is connected by R1 between M0 and M1, by power resistor R1
The detection at two ends, obtains input voltage and input current, so as to need the switching frequency for adjusting M0 according to application;By to power
The detection at resistance R2 two ends, obtains the voltage and charging current at battery two ends, so as to the charging/discharging voltage, the electricity that are needed according to battery
The pulsewidth of stream adjustment PWM1, PWM2, realizes the precise control to two MOSFET of M1, M2.
7. SCM Based multifunctional intellectual batter-charghing system according to claim 1, it is characterised in that the system
System adopts constant-current constant-voltage charging method, enters line precharge using less current versus cell at the charging initial stage, to there is the electricity put
Pond is repaired and is protected, and then battery is charged using larger constant current, realizes the purpose of quick charge;Finally adopt
Constant-potential charge, it is ensured that battery is full of.
Priority Applications (1)
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CN201611124411.7A CN106655363A (en) | 2016-12-08 | 2016-12-08 | Single chip microcomputer-based multifunctional smart battery charging system |
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CN201611124411.7A CN106655363A (en) | 2016-12-08 | 2016-12-08 | Single chip microcomputer-based multifunctional smart battery charging system |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113141036A (en) * | 2021-04-15 | 2021-07-20 | 深圳市索源科技有限公司 | Electric tool charger and assembly thereof |
Citations (3)
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CN103762843A (en) * | 2013-10-18 | 2014-04-30 | 江苏大学 | Two-way boost-buck circuit for storage battery energy-storage system and digital control method thereof |
CN104319854A (en) * | 2014-11-18 | 2015-01-28 | 内蒙古科技大学 | Electric bicycle independent photovoltaic charging device and charging method thereof |
US20170302102A1 (en) * | 2011-03-22 | 2017-10-19 | Triune Systems, LLC | Variable power energy harvesting system |
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2016
- 2016-12-08 CN CN201611124411.7A patent/CN106655363A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170302102A1 (en) * | 2011-03-22 | 2017-10-19 | Triune Systems, LLC | Variable power energy harvesting system |
CN103762843A (en) * | 2013-10-18 | 2014-04-30 | 江苏大学 | Two-way boost-buck circuit for storage battery energy-storage system and digital control method thereof |
CN104319854A (en) * | 2014-11-18 | 2015-01-28 | 内蒙古科技大学 | Electric bicycle independent photovoltaic charging device and charging method thereof |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113141036A (en) * | 2021-04-15 | 2021-07-20 | 深圳市索源科技有限公司 | Electric tool charger and assembly thereof |
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Application publication date: 20170510 |