CN106655363A - Single chip microcomputer-based multifunctional smart battery charging system - Google Patents

Single chip microcomputer-based multifunctional smart battery charging system Download PDF

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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.)
Pending
Application number
CN201611124411.7A
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Chinese (zh)
Inventor
吴斌
汪峰
潘燚
朱弘强
蔡辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CETC 23 Research Institute
CETC 32 Research Institute
Original Assignee
CETC 23 Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CETC 23 Research Institute filed Critical CETC 23 Research Institute
Priority to CN201611124411.7A priority Critical patent/CN106655363A/en
Publication of CN106655363A publication Critical patent/CN106655363A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • H02J7/0071Regulation of charging or discharging current or voltage with a programmable schedule
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/30Charge 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

SCM Based multifunctional intellectual batter-charghing system
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.
CN201611124411.7A 2016-12-08 2016-12-08 Single chip microcomputer-based multifunctional smart battery charging system Pending CN106655363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611124411.7A CN106655363A (en) 2016-12-08 2016-12-08 Single chip microcomputer-based multifunctional smart battery charging system

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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Application publication date: 20170510