CN201523248U - Intelligent charger - Google Patents
Intelligent charger Download PDFInfo
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- CN201523248U CN201523248U CN2009202283368U CN200920228336U CN201523248U CN 201523248 U CN201523248 U CN 201523248U CN 2009202283368 U CN2009202283368 U CN 2009202283368U CN 200920228336 U CN200920228336 U CN 200920228336U CN 201523248 U CN201523248 U CN 201523248U
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Abstract
The utility model discloses an intelligent charger which comprises a charging current control circuit, a charging current comparator, a charging voltage detection circuit, a charging state indication circuit and a series port communication circuit which are respectively connected with a microprocessor, wherein the periphery of the intelligent charger is provided with a PS1718B chip, the microprocessor adopts a GMS97C2051 chip as a programming controller, and the charging voltage detection circuit is a high frequency disturbance resistance integration circuit. The intelligent charger can achieve accurate detection of charging voltage, can eliminate high frequency disturbance of battery voltage, has stable and reliable work, can charge more than one batteries in 10 nickel-cadmium, nickel-hydrogen or lithium batteries once, and compared with a traditional charger, the intelligent charger has more flexible charging mode and more convenient charging control, and lowers cost.
Description
Technical field
The utility model relates to charger, particularly relates to a kind of intelligent charger.
Background technology
Traditional charger generally can only charge at a certain chemical cell, and charge mode is single, and charging current, charging interval generally all can not be adjusted, and also is difficult to realize the real-time monitoring to charging process.When more than one battery combination are charged in the user need be to more piece NI-G, ni-mh or lithium ion battery, precision, reliability and the real-time specification requirement of monitoring to voltage sample are all very high, if utilize traditional charger to charge, often because voltage sample is inaccurate, cause over-charging of battery or underfill just to stop charging, not only shorten the life-span of battery easily, dangerous situations such as battery explosion, damage charger also may take place.
The utility model content
The purpose of this utility model is in order to overcome the deficiency of above-mentioned background technology, and a kind of intelligent charger that can charge to more than one battery combination in more piece NI-G, ni-mh or the lithium ion battery is provided, and can realize the accurate detection of charging voltage.
The intelligent charger that the utility model provides, comprise the charging current control circuit, charging current comparator, charging voltage testing circuit, charged state indicating circuit, the serial communication circuit that link to each other with microprocessor respectively, its outer periphery is equipped with the PS1718B chip, described microprocessor adopts the GMS97C2051 chip to make programmable controller, and described charging voltage testing circuit is anti-High-frequency Interference integrating circuit.
In technique scheme, described charging voltage testing circuit comprises: three amplifier U1B, U1C, U1D, switch triode T4, diode D1, D2, capacitor C 2, C7, resistance R 1, R8, R9, R10, R11, R15, R19, R20, the in-phase input end of amplifier U1B is respectively by resistance R 8, the BATT-end of R9 and PS1718B chip, the BATT+ end links to each other, the inverting input of amplifier U1B links to each other with the collector electrode of switch triode T4 by resistance R 11, the collector electrode of switch triode T4 links to each other with the BATT+ end of PS1718B chip by resistance R 10, be provided with capacitor C 2 between the inverting input of amplifier U1B and the output, the output of amplifier U1B links to each other with the inverting input of amplifier U1C, the in-phase input end of amplifier U1C is by resistance R 15, capacitor C 7 links to each other with the emitter of switch triode T4, the in-phase input end of amplifier U1D links to each other with the BATT-end of PS1718B chip, the inverting input of amplifier U1D is by resistance R 1 ground connection, amplifier U1D, the output of U1C respectively with diode D1, the negative pole of D2 links to each other, diode D1, the positive pole of D2 passes through R19 respectively, R20 links to each other with the Vref end of PS1718B chip.
In technique scheme, comprise constant-current source circuit in the described charging current control circuit, described constant-current source circuit is the proportional integral feedback regulating circuit, comprise amplifier U1A, adjust and drive triode T1, control triode T3, capacitor C 1, resistance R 1, R2, R3, R4, R5, R6, R7, R17, the in-phase input end of amplifier U1A respectively with resistance R 2, R3 links to each other, resistance R 2 is by R1 ground connection, the inverting input of amplifier U1A links to each other with the BATT-end of PS1718B chip by resistance R 4, the inverting input of amplifier U1A is by resistance R 5, capacitor C 1 links to each other with the output of amplifier U1A, the output of amplifier U1A links to each other with the base stage of adjusting driving triode T1 by resistance R 6, adjusting the collector electrode that drives triode T1 links to each other with the DRV end of PS1718B chip, adjust the base stage that drives triode T1, the collector electrode of control triode T3 links to each other with the Ctrl end of PS1718B chip respectively, adjust the emitter that drives triode T1, the base stage of control triode T3 is respectively by resistance R 7, R17 links to each other with the Vref end of PS1718B chip, and the emitter of control triode T3 links to each other with the Vref end of PS1718B chip.
In technique scheme, also comprise voltage-stabiliser tube Z1 in the described constant-current source circuit, to adjust the emitter that drives triode T1 and link to each other with the BATT-end of PS1718B chip by voltage-stabiliser tube Z1, the positive pole of voltage-stabiliser tube Z1 links to each other with the BATT-end of PS1718B chip.
In technique scheme, also comprise reference voltage source, described reference voltage source comprises the adjustable shunting a reference source of three ends TL431, triode T2, capacitor C 3, resistance R 12, R13, R14, the anode of TL431 links to each other with the Vref end of PS1718B chip by capacitor C 3, the anode of TL431 extremely links to each other with the reference of TL431 by resistance R 13, the reference utmost point of TL431 links to each other with the Vref end of PS1718B chip by resistance R 12, the negative electrode of TL431 links to each other with the base stage of triode T2, the base stage of triode T2 links to each other the collector electrode of triode T2 by resistance R 14 with the collector electrode of triode T2, emitter respectively with the V+ of PS1718B chip end, the Vref end links to each other.
In technique scheme, also comprise discharge circuit, described discharge circuit comprises triode 8050 and power consumption resistance R d, the collector electrode of triode 8050 links to each other with power consumption resistance R d, the base stage of triode 8050 links to each other with the DISCHG end of PS1718B chip, and the emitter of triode 8050 links to each other with the BATT-end of PS1718B chip.
In technique scheme, also comprise the battery temperature testing circuit, described battery temperature testing circuit comprises GMS97C2051 chip internal comparator and thermistor.
Advantage of the present utility model is:
Intelligent charger is made of intelligent charge controller and peripheral components thereof, wherein charge controller is partially integrated in the encapsulation of a DIP28, charge controller adapts to different peripheral components, can constitute NI-G, ni-mh and the charger for lithium ion battery of different capabilities, different joint numbers.Intelligent charge controller part mainly constitutes the battery voltage detection benchmark by TL431, adjustment pipe T2, and double as microcontroller power supply, constitute the anti-High-frequency Interference integrating circuit of high accuracy by three amplifier U1B, U1C, U1D, switch triode T4, diode D1, D2, capacitor C 2, C7, resistance R 1, R8, R9, R10, R11, R15, R19, R20, realize the accurate detection of charging voltage, accurately judge NI-G, the constant current charge of Ni-MH battery stops constantly, and utilizes GMS97C2051 internal comparator and battery thermistor to realize that the battery maximum temperature detects control.Discharge circuit is made up of peripheral power transistor and power consumption resistance R d, and controlled by single-chip microcomputer P3.7.The intelligent charge controller can be provided with the various parameters that discharge and recharge by serial port, host computer, can monitor the various parameters in the charge and discharge process simultaneously.The utility model can once can fill 10 joint NI-G, ni-mh or lithium ion batteries to NI-G, ni-mh and lithium ion cell charging.For NI-G, Ni-MH battery, adopt advanced-Δ V algorithm to judge that battery is full of, for lithium ion battery, adopt constant current-constant voltage mode to charge, the big I of charging constant current is adjusted by the resistance that changes current feedback resistance, can detect the battery charging and discharging temperature in real time, the charged state indication, can be easily and host computer (being PC) communication by serial ports, the various parameters in the output battery charging process also can be provided with the charge parameter of charger simultaneously by host computer, compare with conventional charger, the utility model charging modes is flexible, and charging control is convenient, has reduced cost.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a structured flowchart of the present utility model;
Fig. 3 is a circuit theory schematic diagram of the present utility model;
Fig. 4 is a peripheral circuit schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail, but this embodiment should not be construed as restriction of the present utility model.
Referring to illustrated in figures 1 and 2, the intelligent charger that the utility model provides, comprise the charging current control circuit, charging current comparator, charging voltage testing circuit, charged state indicating circuit, the serial communication circuit that link to each other with microprocessor respectively, its outer periphery is equipped with the PS1718B chip, described microprocessor adopts the GMS97C2051 chip to make programmable controller, and described charging voltage testing circuit is anti-High-frequency Interference integrating circuit.
Referring to shown in Figure 3, described charging voltage testing circuit comprises: three amplifier U1B, U1C, U1D, switch triode T4, diode D1, D2, capacitor C 2, C7, resistance R 1, R8, R9, R10, R11, R15, R19, R20, the in-phase input end of amplifier U1B is respectively by resistance R 8, the BATT-end of R9 and PS1718B chip, the BATT+ end links to each other, the inverting input of amplifier U1B links to each other with the collector electrode of switch triode T4 by resistance R 11, the collector electrode of switch triode T4 links to each other with the BATT+ end of PS1718B chip by resistance R 10, be provided with capacitor C 2 between the inverting input of amplifier U1B and the output, the output of amplifier U1B links to each other with the inverting input of amplifier U1C, the in-phase input end of amplifier U1C is by resistance R 15, capacitor C 7 links to each other with the emitter of switch triode T4, the in-phase input end of amplifier U1D links to each other with the BATT-end of PS1718B chip, the inverting input of amplifier U1D is by resistance R 1 ground connection, amplifier U1D, the output of U1C respectively with diode D1, the negative pole of D2 links to each other, diode D1, the positive pole of D2 passes through R19 respectively, R20 links to each other with the Vref end of PS1718B chip.
Comprise constant-current source circuit in the described charging current control circuit, described constant-current source circuit is the proportional integral feedback regulating circuit, comprise amplifier U1A, adjust and drive triode T1, control triode T3, voltage-stabiliser tube Z1, capacitor C 1, resistance R 1, R2, R3, R4, R5, R6, R7, R17, the in-phase input end of amplifier U1A respectively with resistance R 2, R3 links to each other, resistance R 2 is by R1 ground connection, the inverting input of amplifier U1A links to each other with the BATT-end of PS1718B chip by resistance R 4, the inverting input of amplifier U1A is by resistance R 5, capacitor C 1 links to each other with the output of amplifier U1A, the output of amplifier U1A links to each other with the base stage of adjusting driving triode T1 by resistance R 6, adjusting the collector electrode that drives triode T1 links to each other with the DRV end of PS1718B chip, adjust the base stage that drives triode T1, the collector electrode of control triode T3 links to each other with the Ctrl end of PS1718B chip respectively, adjust the emitter that drives triode T1, the base stage of control triode T3 is respectively by resistance R 7, R17 links to each other with the Vref end of PS1718B chip, the emitter of control triode T3 links to each other with the Vref end of PS1718B chip, adjust the emitter that drives triode T1 and link to each other with the BATT-end of PS1718B chip by voltage-stabiliser tube Z1, the positive pole of voltage-stabiliser tube Z1 links to each other with the BATT-end of PS1718B chip.
The intelligent charger that the utility model provides also comprises reference voltage source, described reference voltage source comprises the adjustable shunting a reference source of three ends TL431, triode T2, capacitor C 3, resistance R 12, R13, R14, the anode of TL431 links to each other with the Vref end of PS1718B chip by capacitor C 3, the anode of TL431 extremely links to each other with the reference of TL431 by resistance R 13, the reference utmost point of TL431 links to each other with the Vref end of PS1718B chip by resistance R 12, the negative electrode of TL431 links to each other with the base stage of triode T2, the base stage of triode T2 links to each other the collector electrode of triode T2 by resistance R 14 with the collector electrode of triode T2, emitter respectively with the V+ of PS1718B chip end, the Vref end links to each other.
Referring to shown in Figure 4, the intelligent charger that the utility model provides also comprises discharge circuit, described discharge circuit comprises triode 8050 and power consumption resistance R d, the collector electrode of triode 8050 links to each other with power consumption resistance R d, the base stage of triode 8050 links to each other with the DISCHG end of PS1718B chip, and the emitter of triode 8050 links to each other with the BATT-end of PS1718B chip.The intelligent charger that the utility model provides also comprises the battery temperature testing circuit, and described battery temperature testing circuit comprises GMS97C2051 chip internal comparator and thermistor.
Operation principle of the present utility model is as follows:
The utility model detects the cell voltage that is charging by the charging voltage testing circuit, reaches the identification battery charging state so that the purpose of controlling.Constitute the anti-High-frequency Interference integrating circuit of high accuracy by three amplifier U1B, U1C, U1D, switch triode T4, capacitor C 2, C7, diode D1, D2, resistance R 1, R8, R9, R10, R11, R15, R19, R20, realize the accurate detection of charging voltage, accurately judge the charging termination moment of NI-G, Ni-MH battery.Wherein U1B forms integrating circuit, and U1C, U1D make the upper and lower limit voltage comparator respectively.Here upper voltage limit is reference voltage 5V, and lower voltage limit is made as 2.5V, thereby guarantees to be operated in the amplifier linear zone.
The charging and the discharge of switch triode T4 control integrating capacitor, when its saturation conduction, capacitor C 2 chargings are got R8=R9, then charging current
(omitting tube voltage drop), and when T4 ends, make capacitor C 2 discharges, get R8=R9, then discharging current
Get R10=470K, R11=5.1K, then R10＞＞R11, discharge is much slower than charging, and discharge process is not subjected to the influence of switch triode, so utilizes discharge process to detect cell voltage can to guarantee very high precision.Amplifier U1B output voltage drops to 2.5V from 5V, and promptly the end of capacitor C 2 is pressed because of discharge decline.During Δ V=5-2.5=2.5V, required time T can be derived by following formula: according to
The electric weight dq=C of (dq is the capacitance charge increment, and dv is the capacitance voltage increment) capacitor C of can flowing through 2
2Dv, electric current so
I is then arranged
DT=C
2Δ V, i.e. T=C
2* Δ V/I
D=C
2* 2.5*2 (R10+R11)/V
BT=5 (R10+R11) C
2/ V
BT, here if get R10=470K, R11=5.1K, C
2=0.1u, the substitution following formula can get
This shows that discharge time, T and charged battery voltage were inversely proportional to, and were linear relationships.Work as V
BTDuring=8V, can get T
8=29.69mS, this is for the single-chip microcomputer that adopts the 6MHZ crystal oscillator, because of its timing can be accurate to 2 μ S, so can accomplish very high precision, be easy to make the resolution of voltage detecting circuit to reach 5mV, since be integrated detected, can eliminate fully the High-frequency Interference of cell voltage, so working stability is reliable.
Reference voltage source is as the battery voltage detection benchmark, and the double as microcontroller power supply.When R12=R13, the emitter voltage of triode T2 equals the twice of TL431 internal reference voltage (VR=2.5V), i.e. 2VR=5V.Utilize GMS97C2051 internal comparator and thermistor, can realize that the battery maximum temperature detects control.Benchmark voltage is 2.5V, because thermistor is a negative temperature characteristic, when battery temperature raises, the resistance of thermistor is corresponding to be reduced, its dividing potential drop is that detected voltage also reduces simultaneously, when being lower than 2.5V (benchmark), thinks that promptly battery temperature reaches the highest control temperature.Discharge circuit is made up of triode 8050 and power consumption resistance R d, and controlled by single-chip microcomputer P3.7, here discharging current I
DIS=V
BT/ R
D
Microprocessor adopts different algorithms according to the difference of battery variety, realizes the quick charge of more piece NI-G, ni-mh and lithium ion battery, by serial port, can be easily and upper machine communication, and realize the monitoring and the management of charging process.Microprocessor adopts single-chip microcomputer GMS97C2051 to make programmable controller, and its inner comparator is as battery maximum temperature detector.The negative slope or zero slope of battery-end being pressed by single-chip microcomputer GMS97C2051 inner control program regularly detect, and whether the identification battery is full of.Battery is full of the back or the trickle charge time surpasses 7 hours, then outage and enter in 1: 19 pulse current charge mode of duty ratio and carry out trickle charge automatically.Before to NI-G, Ni-MH battery charging, can press DIS-K key request discharge.In discharge process, when cell voltage VB≤final discharging voltage VR, charger stops discharge automatically, and changes charged state over to.To the charging modes of lithium battery in two steps: in charging process, when the lithium battery end is pressed less than 4.20V, carry out constant current Is charging; Charge and when lithium battery voltage reaches 4.20V, change constant voltage (Vs=4.20V) over to.This guarantees conversion automatically by circuit.Entering after the constant voltage mode charges, along with obtaining electric weight, increases by battery, and charging current can reduce gradually.When charging current less than 15% of Is, and guarantee that the lithium battery open circuit voltage when 4.10V is above, thinks that promptly battery is full of.At this moment stop charging.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.The content that is not described in detail in this specification belongs to this area professional and technical personnel's known prior art.
Claims (7)
1. intelligent charger, comprise the charging current control circuit, charging current comparator, charging voltage testing circuit, charged state indicating circuit, the serial communication circuit that link to each other with microprocessor respectively, its outer periphery is equipped with the PS1718B chip, it is characterized in that: described microprocessor adopts the GMS97C2051 chip to make programmable controller, and described charging voltage testing circuit is anti-High-frequency Interference integrating circuit.
2. intelligent charger as claimed in claim 1, it is characterized in that: described charging voltage testing circuit comprises: three amplifier U1B, U1C, U1D, switch triode T4, diode D1, D2, capacitor C 2, C7, resistance R 1, R8, R9, R10, R11, R15, R19, R20, the in-phase input end of amplifier U1B is respectively by resistance R 8, the BATT-end of R9 and PS1718B chip, the BATT+ end links to each other, the inverting input of amplifier U1B links to each other with the collector electrode of switch triode T4 by resistance R 11, the collector electrode of switch triode T4 links to each other with the BATT+ end of PS1718B chip by resistance R 10, be provided with capacitor C 2 between the inverting input of amplifier U1B and the output, the output of amplifier U1B links to each other with the inverting input of amplifier U1C, the in-phase input end of amplifier U1C is by resistance R 15, capacitor C 7 links to each other with the emitter of switch triode T4, the in-phase input end of amplifier U1D links to each other with the BATT-end of PS1718B chip, the inverting input of amplifier U1D is by resistance R 1 ground connection, amplifier U1D, the output of U1C respectively with diode D1, the negative pole of D2 links to each other, diode D1, the positive pole of D2 passes through R19 respectively, R20 links to each other with the Vref end of PS1718B chip.
3. intelligent charger as claimed in claim 1, it is characterized in that: comprise constant-current source circuit in the described charging current control circuit, described constant-current source circuit is the proportional integral feedback regulating circuit, comprise amplifier U1A, adjust and drive triode T1, control triode T3, capacitor C 1, resistance R 1, R2, R3, R4, R5, R6, R7, R17, the in-phase input end of amplifier U1A respectively with resistance R 2, R3 links to each other, resistance R 2 is by R1 ground connection, the inverting input of amplifier U1A links to each other with the BATT-end of PS1718B chip by resistance R 4, the inverting input of amplifier U1A is by resistance R 5, capacitor C 1 links to each other with the output of amplifier U1A, the output of amplifier U1A links to each other with the base stage of adjusting driving triode T1 by resistance R 6, adjusting the collector electrode that drives triode T1 links to each other with the DRV end of PS1718B chip, adjust the base stage that drives triode T1, the collector electrode of control triode T3 links to each other with the Ctrl end of PS1718B chip respectively, adjust the emitter that drives triode T1, the base stage of control triode T3 is respectively by resistance R 7, R17 links to each other with the Vref end of PS1718B chip, and the emitter of control triode T3 links to each other with the Vref end of PS1718B chip.
4. intelligent charger as claimed in claim 3, it is characterized in that: also comprise voltage-stabiliser tube Z1 in the described constant-current source circuit, adjust the emitter that drives triode T1 and link to each other with the BATT-end of PS1718B chip by voltage-stabiliser tube Z1, the positive pole of voltage-stabiliser tube Z1 links to each other with the BATT-end of PS1718B chip.
5. intelligent charger as claimed in claim 1, it is characterized in that: also comprise reference voltage source, described reference voltage source comprises the adjustable shunting a reference source of three ends TL431, triode T2, capacitor C 3, resistance R 12, R13, R14, the anode of TL431 links to each other with the Vref end of PS1718B chip by capacitor C 3, the anode of TL431 extremely links to each other with the reference of TL431 by resistance R 13, the reference utmost point of TL431 links to each other with the Vref end of PS1718B chip by resistance R 12, the negative electrode of TL431 links to each other with the base stage of triode T2, the base stage of triode T2 links to each other the collector electrode of triode T2 by resistance R 14 with the collector electrode of triode T2, emitter respectively with the V+ of PS1718B chip end, the Vref end links to each other.
6. intelligent charger as claimed in claim 1, it is characterized in that: it also comprises discharge circuit, described discharge circuit comprises triode 8050 and power consumption resistance R d, the collector electrode of triode 8050 links to each other with power consumption resistance R d, the base stage of triode 8050 links to each other with the DISCHG end of PS1718B chip, and the emitter of triode 8050 links to each other with the BATT-end of PS1718B chip.
7. as each described intelligent charger in the claim 1 to 6, it is characterized in that: also comprise the battery temperature testing circuit, described battery temperature testing circuit comprises GMS97C2051 chip internal comparator and thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202283368U CN201523248U (en) | 2009-09-22 | 2009-09-22 | Intelligent charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202283368U CN201523248U (en) | 2009-09-22 | 2009-09-22 | Intelligent charger |
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| Publication Number | Publication Date |
|---|---|
| CN201523248U true CN201523248U (en) | 2010-07-07 |
Family
ID=42509424
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| CN2009202283368U Expired - Lifetime CN201523248U (en) | 2009-09-22 | 2009-09-22 | Intelligent charger |
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| CN (1) | CN201523248U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457315A (en) * | 2013-07-25 | 2013-12-18 | 杭州电子科技大学 | Solar charging control circuit |
| CN104596665A (en) * | 2014-12-30 | 2015-05-06 | 西安乾易企业管理咨询有限公司 | Method for detecting battery temperature during charging |
| CN104795603A (en) * | 2013-12-18 | 2015-07-22 | 福特全球技术公司 | Temperature monitoring HEV charger cord assembly and charging method |
-
2009
- 2009-09-22 CN CN2009202283368U patent/CN201523248U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457315A (en) * | 2013-07-25 | 2013-12-18 | 杭州电子科技大学 | Solar charging control circuit |
| CN104795603A (en) * | 2013-12-18 | 2015-07-22 | 福特全球技术公司 | Temperature monitoring HEV charger cord assembly and charging method |
| CN104596665A (en) * | 2014-12-30 | 2015-05-06 | 西安乾易企业管理咨询有限公司 | Method for detecting battery temperature during charging |
| CN104596665B (en) * | 2014-12-30 | 2017-07-28 | 西安易朴通讯技术有限公司 | A kind of method that battery temperature is detected during charging |
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Granted publication date: 20100707 |