CN107980328A - Has the gardens machine of lithium battery single chip control unit circuit - Google Patents

Has the gardens machine of lithium battery single chip control unit circuit Download PDF

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Publication number
CN107980328A
CN107980328A CN201710951460.6A CN201710951460A CN107980328A CN 107980328 A CN107980328 A CN 107980328A CN 201710951460 A CN201710951460 A CN 201710951460A CN 107980328 A CN107980328 A CN 107980328A
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CN
China
Prior art keywords
voltage
battery
temperature
control unit
chip
Prior art date
Application number
CN201710951460.6A
Other languages
Chinese (zh)
Inventor
苏克
叶晓波
黄爱民
Original Assignee
宁波大叶园林设备股份有限公司
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Application filed by 宁波大叶园林设备股份有限公司 filed Critical 宁波大叶园林设备股份有限公司
Priority to CN201710951460.6A priority Critical patent/CN107980328A/en
Publication of CN107980328A publication Critical patent/CN107980328A/en

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/416Flexible line cutters
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D69/00Driving mechanisms or parts thereof for harvesters or mowers
    • A01D69/02Driving mechanisms or parts thereof for harvesters or mowers electric
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D75/00Accessories for harvesters or mowers
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D75/00Accessories for harvesters or mowers
    • A01D75/18Safety devices for parts of the machines
    • 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
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H02J7/0047Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • H02J7/00712Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H02J7/007184Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage in response to battery voltage gradient
    • 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
    • H02J7/0072Regulation of charging or discharging current or voltage using semiconductor devices only
    • H02J7/0088Regulation of charging or discharging current or voltage using semiconductor devices only the charge cycle being terminated in response to non-electric parameters
    • H02J7/0091Regulation of charging or discharging current or voltage using semiconductor devices only the charge cycle being terminated in response to non-electric parameters in response to temperature of the battery
    • 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
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302Overcharge protection
    • 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
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306Overdischarge protection

Abstract

Have the gardens machine of lithium battery single chip control unit circuit, there is single chip control unit battery pack is stopped by control signal, so that the accurate sampling battery temperature signal of single chip control unit, effect are self-evident.Single chip control unit makes battery pack be stopped by control signal, wherein, C82, C94 filter out the interference signal at NTC1, NTC2 both ends respectively, so as to the accurate sampling battery temperature signal of single chip control unit;Employ two-way temperature monitoring circuit, the operating temperature situation of energy each battery of actual monitored.Supply lithium battery charging voltage multi resonant superimposed voltage charges such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula, and differential circuit is mutually arranged in pairs or groups.The balancing technique of the unbalanced detection function of the design circuit single-unit battery core and intelligence, comprehensive composition effect of vibration and noise reduction have a serial gardens machine of improvement, a tractor serves several purposes, lift the quality of exported product, world gardens machine of taking the lead in race.

Description

Has the gardens machine of lithium battery single chip control unit circuit
Technical field
The present invention relates to a kind of electronic beat the grass to cut the grass on a lawn for places such as flower bed, garden, park and road sides to cut Filling machine, the improvement of especially a kind of dual-purpose machine of low vibration, includes the telescopic rod of host middle and upper part mobile jib adjustable length, turns 180 Runing rest is spent, and circuit adds insurance, the foamed plastics that the additional vibration damping of motor moves, double acting switch positions the improvement slided, and Improve motors degree and have the gardens machine of lithium battery single chip control unit circuit.
Background technology
Grass-mowing machine is widely used in mowing by the selected mode of hobby of people.Some operation pedestrians like and practise During usual grass-mowing machine, when particularly running into corner place, the rotation knob at middle part is pressed, then turns over mobile jib 180 degree, hand is decontroled, leans on Spring reset, can both work;But mobile jib often the positioning when do not live surely, it is micro to wave.It is different to operate the height of pedestrian, And custom takes the difference of operating angle, it is necessary to mobile jib adjustable length, and the round type bar riveting of original positioning mobile jib Mechanism, leaves and easily causes the micro shortcoming rocked of mobile jib.Primary circuit lack overloading protection, if plus insurance or overtemperature relay, it will more Safety.The positioning of double acting switch and the good teamwork for sliding push button, also there is the necessity further optimized;The low vibration of low vibration machine Property and low noise, consider the foamed plastics that is moved in the additional vibration damping of motor and in many places of grass-mowing machine plus-minus shake deadener;And shake Dynamic and noise very big root power and instrument precision and geometric tolerance, to dual-purpose, to safety high-power charging use And survey dynamic balancing and precision modulding component, laser sight frock to seek low vibration low noise, are in fact one and leave for a long time Hard nut to crack.
The content of the invention
In order to make up the shortcoming caused by the existing mechanism of grass-mowing machine, rotation knob is still positioned after mobile jib turns over 180 degree can Lean on and it is not micro wave, circuit is had overloading security protection, improved low vibration and low noise, the present invention provide safety High-power charging and the dual-purpose brush cutter of beating the grass of the tool lithium battery multi resonant superimposed voltage element circuit used.
The present invention solves the technical solution taken of its technical problem and method:
A kind of improvement of low vibration grass-mowing machine, the improvement handle assembly that the positioning containing double acting switch comprising grass-mowing machine is slided, The telescopic rod assembly of middle and upper part mobile jib adjustable length, the runing rest assembly of turnback, motor assembly, base containing wire box Beat the grass assembly, attachment component, and circuit of flake down add insurance safety circuit, the additional foamed plastics of motor subtract vibration arrangement and The many places plus-minus shake deadener of grass-mowing machine, and the improvement for line of beating the grass, and improve motor and wire box base concentricity and survey dynamic The existing precision modulding component of balance has laser to sight frock and tool lithium battery multi resonant superimposed voltage composite portfolio element circuit again Charging grass-mowing machine.
A kind of low vibration grass-mowing machine, is the improvement hand that assembling successively is slided comprising double acting switch positioning from top to bottom Handle assembly, the telescopic rod assembly of middle and upper part mobile jib adjustable length and the runing rest assembly of turnback, and motor assembly Assembly is beaten the grass with the flake down of the base containing wire box and is combined into grass-mowing machine;Its attachment component is shoulder strap glasses and standby;Grass-mowing machine Circuit forms safety circuit, the additional foamed plastics of motor and subtracting in many places of grass-mowing machine plus-minus shake deadener added with insurance Vibration arrangement, and improve motor and wire box base concentricity and the dynamically balanced existing precision modulding component of survey has laser to sight again The improved method of frock.
A kind of improvement of low vibration grass-mowing machine, the improvement handle assembly that its positioning containing double acting switch is slided, by electricity Source line (1), cable cover(ing) (2), handle upper casing (3-1), handle lower shell (3-2), switch trigger (4), switch trigger spring (5), Terminal board (6), is inscribed cable (7-1), inductance (7-2), self-tapping screw (8), tension disc (9), switchs (10), safe push button (11), safe push button spring (12) is formed;It is characterized in that:The handle upper casing (3-1) and handle lower shell (3-2) is one left One right side is combined into handle, it is all equipped with wire-hanging hook (3-2a), and crosses line notch (3-2b), so that power cord (1) is from the mistake Line notch, which folds, to be passed through, then is hung on the wire-hanging hook, in order to which line is not easy to pull;The switch is housed on handle Trigger (4), switch trigger spring (5), terminal board (6), is inscribed cable (7-1), inductance (7-2), self-tapping screw (8), crimping Plate (9), switchs (10), safe push button (11), safe push button spring (12), cable cover(ing) (2);The switch trigger (4) and The safe push button (11) is equipped with projecting block in place and collides, and refer to figure (11);It is only safe when promoting Push button (11) and compressing secure push button spring (12), before making the projecting block that the safe push button (11) is equipped with place When moving without colliding, the switch trigger (4) can be just pressed, and the switch (10) is touched by switch trigger, can just be connect Logical grass-mowing machine motor circuit, the purpose is to avoid neglectful malfunction.It is described when unclamping switch trigger (4) Switch trigger spring (5) make its return, then the safe push button spring (12) promotes the safe push button (11) to return Position;The switch (10) also return, is double-pole double throw normal off open state, so that the power-off of grass-mowing machine motor is without working;It is this The design of double-pole double break, makes grass-mowing machine motor not charged, also beneficial to what safety.The cable cover(ing) (2) is soft pvc, to institute The inscribed cable (7-1) stated also has protective effect.Assembly method has a little it is noted that playing self-tapping screw (8) with calmly The pneumatic screw of moment of torsion batch or electric screwdriver, so that moment of torsion is rationally uniform.
A kind of improvement of the low vibration grass-mowing machine, the telescopic rod assembly of its adjustable length of mobile jib containing middle and upper part, by Telescopic tube assembly (13) containing flexible button and snap-on, pipe close (13-1), capacitance (13-2), telescopic tube (13-3), spring electricity Cable (13-4), runing rest (13-5), pipe end positioning rubber plug (13-6), tapping screw (13-7), rotation button spring (14) Formed;It is characterized in that:The upper end of the telescopic tube assembly (13) containing flexible button and snap-on is equipped with the pipe close (13-1), and be fixed on the handle attached together by the handle upper casing (3-1) and handle lower shell (3-2) the first from left right side;It is described Telescopic tube assembly (13) internal activity containing flexible button and snap-on the telescopic tube (13-3) is housed;Can in described The capacitance (13-2) and spring cable line (13-4) are placed with inside telescoping tube (13-3);In the telescopic tube (13-3) Lower part the runing rest (13-5) is housed, pipe end positioning rubber plug (13-6), tapping screw (13-7) and rotation button bullet Spring (14);The outside of the telescopic tube assembly (13) containing flexible button and snap-on is equipped with axial long recess, can to install The assist handle (16) and assist handle stent (17) of position are allocated vertically;The telescopic tube (13-3), refer to figure (14), elongated slot (13-3b) vertically, and multiple such as 12 gears (13-3c) are which is provided with, to stretch with described containing The telescopic tube assembly of button and snap-on (13) matches;Push and set on the telescopic tube assembly (13) containing flexible button and snap-on The flexible button and snap-on (13-3d) having, with regard to that can pull out into the next optional gear of the telescopic tube (13-3) is extracted, are transferred to behaviour The grass-mowing machine working depth that author is liked.
A kind of improvement of the low vibration grass-mowing machine, its runing rest assembly containing turnback, comprising two concepts, One is to turn the runing rest assembly of grass-mowing machine lower part 180 degree by the runing rest (13-5), the other is making auxiliary The assist handle bracket assembly of assistant's handle turnback.The assist handle bracket assembly, by hex nut (15-1), knob (15-2), assist handle (16), assist handle stent (17), hexagon-headed bolt (18) are formed;It is characterized in that:Described is auxiliary Help handle bracket (17) active card be mounted in the telescopic tube assembly (13) containing flexible button and snap-on outside, and with thereon The axial long recess being equipped with matches, and on the assist handle stent (17), Fig. 2 and Figure 16 is refer to, equipped with hexagonal spiral shell Female (15-1), knob (15-2), assist handle (16), elastic knob (15-2), you can allocate vertically assist handle (16) and Assist handle stent (17) arrives position smoothly.And described grass-mowing machine lower part 180 degree is turned by runing rest (13-5) Runing rest assembly, it is characterized in that:Be by the runing rest (13-5) come what is formed a connecting link, i.e., on hold telescoping tube, under open Grass-mowing machine lower casing, refer to Figure 12 and Figure 13;The rotation branch is housed in the lower part of the telescopic tube (13-3) Frame (13-5), pipe end positioning rubber plug (13-6), tapping screw (13-7) and rotation button spring (14), and Fig. 3, Fig. 4 and figure 5;The runing rest assembly containing turnback, further includes protective cover (19), protection steel wire (20), compresses piece (21), self tapping Screw (22), foaming ring (23), and its motor chassis upper casing (30-1) of connection, motor chassis lower casing (30-2), rotates knob (31);The runing rest (13-5) is equipped with the macropore (13-5a) of oval, limited block (13-5b) is additionally provided with, with civilian dress Enter telescoping tube;Runing rest (13-5) is engaged in motor chassis, and with rotation knob (31);Knob (31) is rotated when pressing When, the limited block (13-5b) of runing rest (13-5) is moved down, then the telescopic tube (13-3) can be gone to 180 degree;When When unclamping rotation knob (31), rotation button spring (14) moves up the limited block (13-5b) of runing rest (13-5), then still cocker Live in telescoping tube (13-3), because in the end of telescoping tube (13-3), equipped with square through hole, with limited block (13-5b), referring to Figure 14.
A kind of improvement of low vibration grass-mowing machine, it contains motor assembly, by electric machine assembly (24), motor (24- 1), support pipe sleeve (24-2), wire box base (24-3), hex nut (24-4), safety cap (24-5) are formed;Described one kind The improvement of low vibration grass-mowing machine, the flake down of its base containing wire box are beaten the grass assembly, by solenoid component (25), reel spring (25- 1), machine tooth screw (25-2), reel (25-3), nylon wire (25-4), reel aluminium head (25-5), line eye inserted sheet (25-6), Wire box upper cover (25-7), the line bag blister (25-8) with blister labeling, blade (27), machine tooth screw (28), hex nut (29) Formed;A kind of improvement of low vibration grass-mowing machine, it is containing motor chassis housing assy up and down, by lower casing group on motor chassis Part (30), motor chassis upper casing (30-1), motor chassis lower casing (30-2), rotation knob (31), and the additional foamed material of motor (30-3) is formed;A kind of improvement of low vibration grass-mowing machine, it contains attachment component, by safety goggles (32), shoulder belt (33), spare nylon wire (34), extended line (35) are formed.
The present invention provides a kind of improved safety circuit added with insurance protection of low vibration grass-mowing machine.Described is a kind of low The improvement of vibration lawn mower, it contains the safety circuit added with insurance protection, referring to the circuit diagram as shown in figure (21), by protecting Danger (RC), switchs (K), inductance (L3), inductance (L4), capacitance (C), and the series excited machine equipped with winding (L1) and winding (L2) (M) formed;Inductance (L3) and inductance (L4) in the circuit diagram, inductance (7-2) of the equal Mining as shown in figure (18);This Specially added with insurance (RC), it uses fuse for invention, or with electrothermal relay, or with overcurrent protector, in the hope of safer.
A kind of improvement of low vibration grass-mowing machine, its additional foamed material containing motor subtract vibration arrangement, are this hairs Bright major contribution, is inside and outside motor chassis upper casing (30-1) and motor chassis lower casing (30-2) and outside motor, added with damping With deadener (30-3), meanwhile, in motor chassis upper casing (30-1) and motor chassis lower casing (30-2) and motor close to beating The appropriate location of careless assembly, such as schemes shown in (20), installs shock-absorbing and noise-eliminating material (30-3) additional.The material (30-3), or with resistance to The metallic fiber of temperature, or nonmetallic materials, filling or half filling.Or the sound-absorbing material particularly porous sound absorption material with resistance to medium temperature Material, or flexible material, and film material;The porous material can be fiber-like, foam class, and particulate species are alone good or more Or few mixing is using good.Usable fibers class such as rock wool, or glass fiber, or mineral wool particularly super glass wool;Or use foam Class, fireproof;Or with particulate species such as expanded perlite, porous clay brick, and the fabric of heatproof, felt is filled or attached;By It is different in the acoustic absorptivity (standing-wave-tube method acoustic absorptivity, reverberation method acoustic absorptivity) of each material, incident angle to acoustic absorptivity also Have an impact, some is preferable to high frequency sound absorption, and some is preferable to Low Frequency Sound Absorption, and multiple material has the efficiency of complementation, vibration wave And noise is reflected, convert, absorb, decay, therefore be conducive to further improved performance index, the shock-absorbing and noise-eliminating material, also The many places such as protective cover (19) of grass-mowing machine, runing rest assembly can be added in, and integrates composition one kind and can reach effectiveness in vibration suppression and have and change Good, noise reduction has improved low vibration grass-mowing machine.
A kind of improved another item important offer of the present invention to low vibration grass-mowing machine, is accurate to improve manufacture and assembling The method containing laser of degree, improves motor and wire box base concentricity and the dynamically balanced existing precision modulding component of survey have again it is sharp The improved method of the quasi- frock of illumination.First, the requirement to geometric tolerance is improved from layout design, such as to motor and wire box The requirement of base concentricity, also increases motor and wire box base interference volume, then is pressed with reinforcing frock clamp;Moreover use number Control CNC machining centers prepare precision die, and plastic such as wire box base is post-processed, its main method is to use high-temperature vapour Method, preferably steams enough more than three hours, is unlikely to deform and loses shape in the hope of plastic part size;Secondly, it is same to improve motor and wire box base Axis degree, during assembling, has the frock press that laser sights using the calibration motor as shown in figure (22) and wire box base concentricity. Described has the frock that laser is sighted, and by press (41), laser sights head (42), motor locating piece (44), 2 middle cylinders (43), wire box base locating piece (46), small cylinder (45) and small cylinder (47), and laser sight head (48), and laser sights head (49) and laser sights head (50) and workpiece motor (24-1) and wire box base (24-3) is collectively constituted;It is characterized in that:It is described Press (41) top, head (42) is sighted equipped with laser, to sight electrical axis;The middle part of the press (41), if There is around each one motor locating piece (44), and be servo-actuated respectively by one of 2 middle cylinders (43);Under the press (41) Sidepiece, the wire box base locating piece (46) equipped with left and right each one, and servo-actuated by small cylinder (45) and small cylinder (47) respectively, institute Head (50) is sighted in the leave from office portion for the press (41) stated, center equipped with laser, the position of the alignment line box base locating piece of both sides, if The laser for having around each one sights head (48) and laser sights head (49);As an improvement, the locating piece (46) and locating piece (44) or equipped with pressure sensor, each laser sight head and the signal parameter of each locating piece and pressure sensor by CNC handle or Differential signal is performed through nozzle flapper follower.Motor and wire box base concentricity it is calibrated and with this frock press after, and Producing line can be gone up by surveying dynamic balancing amendment through bulk sampling, and last complete machine, which will also sample, surveys dynamic balancing, disappears in the hope of being aided with many places damping Sound material, and integrating composition one kind has improved low vibration grass-mowing machine.Grass-mowing machine and brush cutter and grass trimmer are referred to as gardens machine.
A kind of improved another item important offer of the present invention to low vibration grass-mowing machine, is for line changing in itself of beating the grass Into.Sometimes when operator has found that convex block will stretch out line in pressing, but often there is the phenomenon that nylon wire blocks.Its main cause it First, in addition to being designed with and want improvements of runner, also have one it is important the reason for be line in itself.Because existing line, including circle Line and square or lineae trapezoidea, all there is card line phenomenon once in a while.Line that is particularly square or diamond-shaped cross-section and twisting into screw thread sample, although There is certain noise-decreasing when high speed rotates, therefore be also referred to as special-shaped low-noise line, but because of its square or diamond shape point The stupefied side of profit, causes the Le on linear window that goes out of runner sheath to grind narrow groove, so as to cause the phenomenon that nylon wire blocks occur; The present invention provides a kind of nylon outlet of the improvement of grass-mowing machine, alternatively referred to as grass-mowing machine abnormity non-symmetric line.
Have the gardens machine of lithium battery single chip control unit circuit,
It contains single chip control unit:By the way of reserve battery protection chip is combined with single chip control unit, make Circuit stability is reliable, ensures that battery can work normally under various conditions, the single chip control unit is as operation control Center, is responsible for the various analog signals for ensureing normal battery operation of sampling, and changes digital signal required in order to control, error Small, precision is high, chip strong antijamming capability, simplifies hardware circuit design and reduces the ineffectiveness high phenomenon of hardware circuit;Its Containing voltage transformation module:By battery pack voltage step-down by way of pulse width modulation (PWM), electricity is provided to linear regulator chip Pressure, ensures that voltage stabilizing chip is operated in the range of safe voltage, electric circuit characteristic:PWM is depressured, and is reduced power, is cancelled powerful drop Piezoresistance, improves transfer efficiency, and reduces related elements fever;Its circuit conversion principle:When Q33 triode ONs, battery Wrap total positive voltage BAT+ and the total negative terminal of battery again returned to by triode Q33, inductance L1, capacitance EC2, form charge circuit, BAT+ charges after inductance partial pressure to capacitance EC2, and to maintain the electric quantity consumption of load end VDD5V, while L1 is in energy storage State is deposited, during charging, EC2 capacitance voltages are gradually increasing, when voltage rises to Z9 zener diode breakdown voltages, Z9 Conducting, provides Vbe conducting voltages, Q36 saturation conductions, so as to drag down triode Q35 base voltages, cause Q35 by leading to Q36 Logical state is switched to cut-off state, and before Q35 cut-offs, the Vbe magnitudes of voltage of Q33 are:
Vbe=VBAT+*R114/ (R114+R116)
This magnitude of voltage is more than the on state threshold voltage of Q33, ensures Q33 conductings, after Q35 cut-offs, the Vbe=0 of Q33, Q33 are cut Only, battery always passes through inductance L1 and charges to EC2 capacitances and terminate to the stage of VDD5V power supplies;When Q33 triodes turn off, From triode to inductance L1 charge circuit disconnect, the principle that cannot be mutated according to L inductive currents, for maintain current direction and Size is constant, and for the direction transformation of the induced electromotive force of inductance to be right positive left negative, inductance is in the state to release energy, current channel For:Electric current flows to capacitance EC2 from L1, gives EC2 chargings, for the electricity for maintaining load end VDD5V to be consumed, then from crossing GND ends The negative terminal of inductance induced electromotive force is returned by sustained diode 10, D11;It contains charging control unit:Filled in battery pack When electric stagnation pressure overvoltage, single-unit battery core, charging overcurrent, excess temperature or charger occur abnormal, single chip control unit is by controlling this Element circuit, turns off charge tunnel, ensures charging safety;Under battery pack normal charging condition, single chip control unit output High level CHG_CTR signals by being added in Q26G poles after R162, R161 partial pressure, the field-effect tube metal-oxide-semiconductor conducting of Q26, ignores D, S side pressures drop, and the electric current IQ flowed through from the S ends of MOS1, MOS2 by resistance R159, R160 is:
IQ=VPACK/ (R159+R160), then the voltage at resistance R159 both ends be:VR159=IQ*R159
This voltage is G, S terminal voltage of MOS, and magnitude of voltage is less than threshold voltage VGS, turns on MOS1, MOS2, is entered Charged state;Z11 voltage-stabiliser tubes are connected in parallel on PMOS tube G, S end, and when exception, which occurs, in circuit causes G, S end excessive, Z11 voltage-stabiliser tubes move Make, by G, S terminal voltage clamper in the safe operating voltage range of 16V, avoid pipe breakdown;Charge or put in battery pack When, the instantaneous pressure of charger or motor work generation is superimposed upon D, S end of MOS1, MOS2, punctures MOS, causes battery pack work( It can fail, C98, C99 capacitance are connected in parallel on D, S end of MOS1, MOS2 respectively, and passage, protection MOS work peaces are provided for instantaneous pressure Entirely;Z18, Z12 are ESD electrostatic protection elements, absorb in machine system work and scurry into the instantaneous pressure energy in battery, protect field Electronic component safety in effect pipe MOS and battery pack;
In battery pack charging process, battery core overvoltage, excess temperature or battery pack stagnation pressure are detected higher than setting in protection chip During voltage, CHR_CTR network signals are set to low level by battery pack control chip single chip control unit, and triode Q26 is by leading Logical state is switched to cut-off state, and the VGS voltages of MOS1, MOS1 are zero at this time, less than metal-oxide-semiconductor conducting voltage VTH, forces two Metal-oxide-semiconductor turns off, and stops charging, to ensure battery pack charging safety;It contains cell voltage detection unit:Filled when battery pack is in When electricity, charge condition, single chip control unit can detect battery pack voltage in real time, to protect battery pack to be operated in normal condition, Concrete operating principle is as follows:When single chip control unit is by detecting the analog signal of R155, R156 partial pressure battery pack stagnation pressure Value is proportional to voltage bag total voltage, and obtained analog signal is passed through analog-to-digital conversion, set by single chip control unit Threshold value compares, and performs corresponding action according to comparing, and wherein C80 filters out the interference signal of the pressures of R156 two, so as to microcontroller The accurate sampling battery voltage signal of control unit;If the magnitude of voltage that single chip control unit samples is higher than set charging electricity Threshold value is pressed, then illustrates overvoltage condition at battery pack, single chip control unit can put charge control CHR_CTR network signals at this time For low level, forcibly stop battery pack charging;If the magnitude of voltage that single chip control unit samples is filled less than set Piezoelectric voltage threshold value, then illustrate that battery is in under-voltage condition, and single chip control unit can be communicatively by battery undervoltage at this time Signal is sent to discharge controller, stops battery pack electric discharge;When battery pack in a dormant state when, single chip control unit will BAT_AD_CTR network signals are set to low level, and Q25 metal-oxide-semiconductors are switched to cut-off state by conducting state, prevent battery pack from passing through Sampling resistor discharges, and reduces kwh loss during battery pack idle condition;Its temperature detecting unit containing battery core:Battery pack is charging Or during electric discharge work, operating current is very big, battery core temperature rises, to make the battery core within the scope of suitable temperature work, the design In employ temperature sensing circuit;Temperature detecting function is the simulation based on the reaction cell temperature information inputted from battery pack Signal monitors battery temperature, and single chip control unit is converted to the analog signal sampled by internal analog to digital conversion circuit The digital signal that single chip control unit can identify, specifically, magnitude of voltage and the low temperature threshold of comparative cell temperature detection signal Value and high temperature threshold value, also, in the magnitude of voltage of battery temperature detection signal situation bigger than low temperature threshold or smaller than high temperature threshold value Under, the temperature for being judged as battery is abnormality;The thermal resistor used is heat of the temperature with resistance value relation for negative characteristic Sensitive resistor, temperature is higher, and the resistance value of temperature-sensitive is smaller, then the voltage for the battery temperature signal that single chip control unit detects It is worth smaller, therefore, when battery temperature signal magnitude of voltage is bigger than the low temperature threshold that single chip control unit is set, illustrates battery temperature Degree is less than the temperature value set, it is meant that battery temperature is low temperature, and battery temperature abnormal signal is set to by single chip control unit High level, on the contrary, when the value of battery temperature detection signal is smaller than high temperature threshold value, then means that battery is in the condition of high temperature, Battery temperature abnormal signal is set to high level by single chip control unit;Other single chip control units are receiving battery in system During the battery temperature exception information that the single chip control unit of bag is sent, battery pack charge or discharge control is set forcibly to stop Only;When single chip control unit is by detecting R179, NTC1;The battery temperature analog signal that R156, NTC2 partial pressure obtain, and will Obtained analog signal passes through analog to digital conversion circuit, is converted to the digital signal that single chip control unit can identify, with microcontroller Threshold value set by control unit compares, when the temperature value detected higher than low temperature threshold or less than high temperature threshold value or when, all The temperature for being judged as battery is abnormality, and single chip control unit makes battery pack be stopped by control signal, wherein, C82, C94 filter out the interference signal at NTC1, NTC2 both ends respectively, so as to the accurate sampling battery temperature letter of single chip control unit Number;The design employs two-way temperature monitoring circuit, and the operating temperature situation of each battery is detected according to the temperature difference of each battery core; Its display unit containing battery status:It is used as display device by four LED, by combinations of states, can correctly shows battery Voltage, electricity, temperature and battery whether unusual condition etc., judge the working status residing for battery accordingly.Has lithium battery microcontroller The gardens machine of control unit circuit, is further characterized in that, supplies lithium battery charging voltage multi resonant superimposed voltage rather than biography The DC charging of the constant pressure and flow of system, it is by the rectified voltage of lithium battery charging circuit and by being originally intended to spark-erosion machine tool The pulse voltage drawn of astatic multivibrator mixed by multi resonant superimposed voltage element circuit caused by multi resonant superposition Voltage charges such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula;The Self-excitation Multi vibration The pulse voltage that device is drawn is 88 volts, and pulse frequency is 88 kilo hertzs;Between the voltage of the rectification and the pulse voltage by The capacitance of series connection is connected with the differential circuit that bypass resistance is formed;The gardens of the tool lithium battery status display unit circuit Machine, its display unit containing battery status, is used as display device by four LED, by combinations of states, can correctly show battery Voltage, electricity, temperature and battery whether unusual condition etc., can judge the working status residing for battery accordingly;Has lithium battery list The gardens machine of first Voltage unbalance detection process circuit, is further characterized in that, at its detection of Voltage unbalance containing lithium cells Circuit is managed, there is the uneven detection of battery cell voltage and Balance Treatment function;The unbalanced detection of the design circuit single-unit battery core The balancing technique of function and intelligence, concrete operating principle are as follows:Protect the battery pack list of five string battery core composition of chip real time monitoring The analog signal for each battery core that member comes, detection port network name are respectively:BAT1, BAT2, BAT3, BAT4, BAT5, each end Mouth is connected in parallel on the both ends of each single-unit battery core in battery pack respectively, and protection chip performs equilibrium function, it is necessary to meets following bar Part:Under battery pack charging or holding state, at least one economize on electricity core voltage is higher than the startup battery core balance of voltage that chip is set During the threshold voltage VCB of function, at least one economize on electricity core voltage is less than the threshold voltage VCB for starting battery core balance of voltage function, There can not be the protection event such as battery core overcurrent, excess temperature, short circuit, battery core is over-pressed, except single-unit battery core low-temperature protection, then starts electricity Equilibrium function is pressed, protects the specific balance of voltage function of chip unit itself, but chip can be caused to generate heat in view of balanced balanced current, this Design uses external circuit balancing technique, is controlled by protection location, and the battery core balance of voltage is carried out by external circuit, can be significantly Balanced balanced current is improved, effectively achieves the mesh of the balance of voltage, while reduces the fever of protection location, makes the work that chip is more reliable Make;When protection chip BAT5 Port detectings be higher than VCB to CELL5, at this time shown in battery core balanced balanced current equation below:Ib= Vcell5/R16, formula;Ignore the saturation voltage drop Vce of triode Q1;In order to work normally balancing circuitry, the following conditions are necessary Meet:PMOS between chip internal BAT5 and BAT4 is opened, and CELL20 is by the way that resistance R21, chip internal switch, R22 is formed The discharge loop of Vcell5, at this time loop current expression formula be:
Ib1=Vcell/ (R36+RDS+R37), formula 1, RDS are chip internal PMOS switch equivalent resistance;
To ensure triode Q16 saturation conductions, then:VBE+IB*R56≤VR37, formula 2;
Wherein, VBE is much larger than IB*R56, and above formula is reduced to:VBE≤VR37, formula 3;
IB=Ib1/ β, formula 4;
VBE Wei tri- E pipe on state threshold voltages, β are the current amplification factor of triode Q16;
Then the voltage of R37 resistance is reduced to:VR37=(Ib1-IB) * R37, formula 5;
Calculated by formula 1- formula 5, the resistance value of suitable R37, the electricity for making balanced balanced current be formed at R37 both ends may be selected Pressure,
The sum of voltage drop in VBE voltage drops and R56 more than Q16, ensure that Q1 is reliably turned on, reach execution battery core and put down The purpose of weighing apparatus;Protection chip can periodically detect battery core balance of voltage condition, when meeting battery core balance of voltage condition, protection Odd number economize on electricity core and even number economize on electricity core voltage in five string battery units where chip wheel mobile equilibrium, i.e., within an equilibration period The battery core of all odd number sections is balanced, next cycle then balances the battery core of even number section, even if only a battery core needs to balance, Next equilibration period will not perform equilibrium function;Battery core balance can be suspended during battery core voltage is detected;When five string batteries When all battery core voltages are all higher than or below start the threshold voltage VCB of battery core balance of voltage function in group unit, stop electricity Press equilibrium function;A filter capacitor C24-C28 is placed between battery core voltage detecting port BAT1-BAT5 and ground network, with R21-R25 forms RC filter circuits, filters out the high-frequency interferencing signal at BATn ends, avoids battery core balancing circuitry from malfunctioning;The design The high-voltage battery component used for multiple protection chip cascades, battery core balanced design are multiple protection chip linkage works, with Ensuring all battery core voltages of whole battery pack can balance;If the protection chip for being responsible for the string battery core of least significant end five detects electricity When pond is in discharge condition, then stop all protection chip balance plays;If least significant end protection chip has detected overvoltage, mistake Temperature, short circuit then suspend the balance play of all protection chips when the event of protection occurs;What if certain grade of protection chip was responsible for When having the generation of under-voltage protection event in battery strings, suspend the balance play in this battery pack, but not send a signal to other guarantors Protect chip and stop balance play;Containing charging control unit, effect is in the overvoltage of battery pack appearance charging stagnation pressure, single-unit battery core, fills When electric overcurrent, excess temperature or charger occur abnormal, single chip control unit turns off charge tunnel by controlling this element circuit, Ensure charging safety;Concrete operating principle is as follows:Under battery pack normal charging condition, the height electricity of single chip control unit output For flat CHG_CTR signals by being added in Q26G poles after R162, R161 partial pressure, the conducting of Q26MOS pipes, ignores D, S side pressure drop, from The electric current IQ that the S ends of MOS1, MOS2 are flowed through by resistance R159, R160 is:IQ=VPACK/ (R159+R160), then resistance The voltage at R159 both ends is:VR159=IQ*R159, this voltage is G, S terminal voltage of MOS, and magnitude of voltage is less than threshold value electricity VGS is pressed, turns on MOS1, MOS2, into charged state;Z11 voltage-stabiliser tubes are connected in parallel on PMOS tube G, S end, when exception occurs in circuit When causing G, S end excessive, the action of Z11 voltage-stabiliser tubes, by G, S terminal voltage clamper in the safe operating voltage range of 16V, avoids Pipe is breakdown;When battery pack charges or puts, the instantaneous pressure of charger or motor work generation is superimposed upon MOS1, MOS2 D, S ends, puncture MOS, cause battery pack disabler, C98, C99 capacitance are connected in parallel on D, S end of MOS1, MOS2 respectively, are moment High pressure provides passage, protects MOS work safetys;Z18, Z12 are ESD electrostatic protection elements, absorb and are scurried into machine system work Instantaneous pressure energy in battery, protects electronic component safety in MOS and battery pack;In battery pack charging process, such as protect When chip detects battery core overvoltage, excess temperature or battery pack stagnation pressure higher than setting voltage, the control of battery pack control chip microcontroller is single CHR_CTR network signals are set to low level by member, and triode Q26 is switched to cut-off state by conducting state, at this time MOS1, MOS1 VGS voltages be zero, less than metal-oxide-semiconductor conducting voltage VTH, force two metal-oxide-semiconductors to turn off, stop charging, to ensure that battery pack charges Safety;Its temperature detecting unit containing battery core:For battery pack when charge or discharge work, operating current is very big, and battery core temperature rises, To make the battery core within the scope of suitable temperature work, temperature sensing circuit is employed in the design;Temperature detecting function is to be based on The analog signal of the reaction cell temperature information inputted from battery pack monitors battery temperature, and single chip control unit will sample To analog signal the digital signal that single chip control unit can identify, comparative cell are converted to by internal analog to digital conversion circuit The magnitude of voltage of temperature detection signal and low temperature threshold and high temperature threshold value, also, the magnitude of voltage of signal is detected than low in battery temperature In the case that warm threshold value is big or smaller than high temperature threshold value, the temperature for being judged as battery is abnormality;The temperature-sensitive used in the design Resistor is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is higher, and the resistance value of temperature-sensitive is smaller, then monolithic The magnitude of voltage for the battery temperature signal that machine control unit detects is smaller, therefore, when battery temperature signal magnitude of voltage compares microcontroller When the low temperature threshold of control unit setting is big, illustrate battery temperature less than the temperature value set, it is meant that battery temperature is low temperature, Battery temperature abnormal signal is set to high level by single chip control unit;On the contrary, when the value of battery temperature detection signal is than high When warm threshold value is small, then mean that battery is in the condition of high temperature, battery temperature abnormal signal is set to high electricity by single chip control unit It is flat;The battery temperature exception information that other single chip control units are sent in the single chip control unit for receiving battery pack in system When stop battery.
Has the gardens machine of lithium battery single chip control unit circuit it is characterized in that supply lithium battery charging voltage multi resonant The DC charging of superimposed voltage rather than traditional constant pressure and flow, its be by lithium battery charging circuit rectified voltage and by It is originally intended to the multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of spark-erosion machine tool is drawn Caused multi resonant superimposed voltage charges such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula;Institute The pulse voltage that the astatic multivibrator stated is drawn is 88 volts, and pulse frequency is 88 kilo hertzs;The voltage of the rectification and institute State and be connected by the capacitance connected with the differential circuit that bypass resistance is formed between pulse voltage;The tool lithium battery electric core temperature Spend the gardens machine of detection cell circuit, its temperature detecting unit containing battery core:Battery pack is when charge or discharge work, operating current Very big, battery core temperature rises, and to make the battery core within the scope of suitable temperature work, temperature sensing circuit is employed in the design; Temperature detecting function is to monitor battery temperature based on the analog signal of the reaction cell temperature information inputted from battery pack, single The analog signal sampled is converted to single chip control unit by internal analog to digital conversion circuit and can identified by piece machine control unit Digital signal, the magnitude of voltage of comparative cell temperature detection signal and low temperature threshold and high temperature threshold value, also, examined in battery temperature Survey signal magnitude of voltage it is bigger than low temperature threshold or smaller than high temperature threshold value in the case of, the temperature for being judged as battery is abnormality; The thermal resistor used in the design is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is higher, temperature-sensitive Resistance value it is smaller, then the magnitude of voltage for the battery temperature signal that single chip control unit detects is smaller, therefore, works as battery temperature When signal voltage value is bigger than the low temperature threshold that single chip control unit is set, illustrate battery temperature less than the temperature value set, meaning It is low temperature that taste, which battery temperature, and battery temperature abnormal signal is set to high level by single chip control unit;On the contrary, work as battery temperature When the value of degree detection signal is smaller than high temperature threshold value, then mean that battery is in the condition of high temperature, single chip control unit is by battery temperature Degree abnormal signal is set to high level;Other single chip control units are sent in the single chip control unit for receiving battery pack in system Battery temperature exception information when, make battery pack charge or discharge control forcibly stop;Concrete operating principle is as follows:Work as list Piece machine control unit is by detecting R179, NTC1;Battery temperature analog signal that R156, NTC2 partial pressure obtain, and will obtain Analog signal passes through analog to digital conversion circuit, is converted to the digital signal that single chip control unit can identify, is controlled with microcontroller single Threshold value set by member compares, when the temperature value detected higher than low temperature threshold or less than high temperature threshold value or when, be all judged as The temperature of battery is abnormality, and single chip control unit makes battery pack be stopped by control signal, wherein, C82, C94 The interference signal at NTC1, NTC2 both ends is filtered out respectively, so as to the accurate sampling battery temperature signal of single chip control unit;Because of reality The temperature of each battery core of battery can be variant in the work of border, and the design employs two-way temperature monitoring circuit, as far as possible actual monitored The operating temperature situation of each battery.
Usefulness:Have the gardens machine of lithium battery single chip control unit circuit, there is single chip control unit to pass through control Signal processed makes battery pack be stopped, so that the accurate sampling battery temperature signal of single chip control unit, effect are self-evident.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the schematic diagram of complete machine.
Fig. 2 is the exploded perspective view of handle and assist handle.
Fig. 3 is the exploded perspective view of the telescopic rod assembly of the mobile jib adjustable length of the present invention.
Fig. 4 is the exploded perspective view of motor chassis.
Fig. 5 is the exploded perspective view of the flake down cutting assembly of motor assembly and the base containing wire box.
Fig. 6 is the schematic diagram of safety goggles (32).
Fig. 7 is the schematic diagram of shoulder belt (33).
Fig. 8 is the schematic diagram of spare nylon wire (34).
Fig. 9 is the schematic diagram of extended line (35).
Figure 10 is the schematic diagram of line bag blister (25-8).
Figure 11 is the schematic diagram of switch in handle.
Figure 12 is the partial schematic diagram of runing rest assembly.
Figure 13 is the schematic diagram of runing rest.
Figure 14 is the schematic diagram of telescopic tube (13-3).
Figure 15 is the partial schematic diagram for installing power cord (1) and cable cover(ing) (2).
Figure 16 is the schematic diagram of assist handle bracket assembly.
Figure 17 is the schematic diagram that motor is mounted in casing internal.
Figure 18 is the schematic diagram of inductance.
Figure 19 is the schematic diagram of line eye inserted sheet (25-6).
Figure 20 is the motor chassis inside and outside schematic diagram for adding shock-absorbing and noise-eliminating material (30-3).
Figure 21 is the safety circuit added with insurance protection.
Figure 22 is the schematic diagram for having laser to sight frock.
Figure 23 is the schematic diagram of grass-mowing machine abnormity non-symmetric line.
Figure 24 is the close-up schematic view of grass-mowing machine abnormity non-symmetric line.
Figure 25 is the schematic diagram of single chip control unit.
Figure 26 is the schematic diagram of voltage transformation module.
Figure 27 is the schematic diagram of charging control unit.
Figure 28 is the schematic diagram of cell voltage detection unit.
Figure 29 is the schematic diagram of battery core temperature detecting unit.
Figure 30 is the schematic diagram of battery status display unit.
Figure 31 is the schematic diagram of lithium cells Voltage unbalance detection process circuit.
As shown in the figure, in figure:
1. it is power cord (1);
2. it is cable cover(ing) (2);
3-1. is handle upper casing (3-1);
3-2. is handle lower shell (3-2);
3-2a. is wire-hanging hook (3-2a);
3-2b. was line notch (3-2b);
4. it is switch trigger (4);
5. it is switch trigger spring (5);
6. it is terminal board (6);
7-1. is inscribed cable (7-1);
7-2. is inductance (7-2);
8. it is self-tapping screw (8);
9. it is tension disc (9);
10. it is switch (10);
11. it is safe push button (11);
12. it is safe push button spring (12);
13. it is the telescopic tube assembly (13) containing flexible button and snap-on;
13-1. is pipe close (13-1);
13-2. is capacitance (13-2);
13-3. is telescopic tube (13-3);
13-4. is spring cable line (13-4);
13-5. is runing rest (13-5);
13-5a. is the macropore (13-5a) of oval;
13-5b is limited block (13-5b);
13-6. is pipe end positioning rubber plug (13-6);
13-7. is tapping screw (13-7);
14. it is rotation button spring (14);
15-1. is hex nut (15-1);
15-2. is knob (15-2);
16. it is assist handle (16);
17. it is assist handle stent (17);
18. it is hexagon-headed bolt (18);
19. it is protective cover (19);
20. it is protection steel wire (20);
21. it is to compress piece (21);
22. it is tapping screw (22);
23. it is foaming ring (23);
24. it is electric machine assembly (24);
24-1. is motor (24-1);
24-2. is support pipe sleeve (24-2);
24-3. is wire box base (24-3);
24-4. is hex nut (24-4);
24-5. is safety cap (24-5);
25. it is solenoid component (25);
25-1. is reel spring (25-1);
25-2. is machine tooth screw (25-2);
25-3. is reel (25-3);
25-4. is nylon wire (25-4);
25-5. is reel aluminium head (25-5);
25-6. is line eye inserted sheet (25-6);
25-7. is wire box upper cover (25-7);
25-8. is the line bag blister (25-8) with blister labeling;
26. it is blade sleeve (26);
27. it is blade (27);
28. it is machine tooth screw (28);
29. it is hex nut (29);
30. it is motor chassis shell component (30) up and down;
30-1. is motor chassis upper casing (30-1);
30-2. is motor chassis lower casing (30-2);
30-3. is silencing vibration-damping foamed material (30-3);
31. it is rotation knob (31);
32. it is safety goggles (32);
33. it is shoulder belt (33);
34. it is spare nylon wire (34);
35. it is extended line (35);
RC. it is insurance (RC);
K. it is switch (K);
L3. it is inductance (L3);
L4. it is inductance (L4);
C. it is capacitance (C);
L1. it is winding (L1);
L2. it is winding (L2);
M. it is series excited machine (M);
Embodiment
Operation pedestrian by like and be accustomed to selection grass-mowing machine, wear safety goggles 32, be also sleeved on shoulder with shoulder belt 33 Upper and handle middle part, and by careless condition route selection, or spare nylon wire 34 is taken, to beat the grass;Power supply and electricity are connected with extended line 35 Source line 1, then the height by operation pedestrian, and custom take the difference of operating angle, adjust the length of telescopic tube 13-3 Degree, and power cord 1 is passed through from the line notch 3-2b foldings of crossing, then hang over wire-hanging hook on the wire-hanging hook;One holds Firmly assist handle 16, the other hand handle handle, and push safe push button 11 open and hold the switch trigger 4, just make motor band Dynamic line of beating the grass, or with spare nylon wire 34, come operation of beating the grass.
It is explained in detail again below:
Because a kind of improvement of low vibration grass-mowing machine, the improvement handle assembly of its positioning slip containing double acting switch, By power cord 1, cable cover(ing) 2, handle upper casing 3-1, handle lower shell 3-2 switch trigger 4, switch trigger spring 5, terminal board 6, Inscribed cable 7-1, inductance 7-2, self-tapping screw 8, tension disc 9, switch 10, safe push button 11, safe 12 groups of push button spring Into;Again because the handle upper casing 3-1 and handle lower shell 3-2 is that the first from left right side is combined into handle, it is all equipped with wire-hanging hook 3- 2a, and cross line notch 3-2b, institute in order to power cord 1 from it is described cross line notch and fold pass through, then the wire-hanging hook described in hanging over On, make line be not easy to pull.The switch trigger 4 is installed on handle, switch trigger spring 5, terminal board 6, is inscribed cable 7-1, inductance 7-2, self-tapping screw 8, tension disc 9, switch 10, safe push button 11, safe push button spring 12, cable cover(ing) 2.Because The switch trigger 4 and the safe push button 11 are equipped with projecting block in place and collide, and refer to Figure 11, institute Only when promoting safe push button 11 and compressing secure push button spring 12, to make the safe push button 11 be equipped with place Projecting block when moving forward without colliding, can just press the switch trigger 4, and the switch 10 is touched by switch trigger Afterwards, grass-mowing machine motor circuit is just can turn on, it is prevented that neglectful malfunction.When unclamping the switch trigger 4, The switch trigger spring 5 makes its return, and then the safe push button spring 12 promotes 11 return of safe push button, The switch 10 also return, is double-pole double throw normal off open state, in this way it is ensured that make the power-off of grass-mowing machine motor without working, therefore institute With the design of this double-pole double break, make grass-mowing machine motor not charged, truly have beneficial what safety.The cable cover(ing) 2 is soft pvc, Therefore also there is protective effect to the inscribed cable 7-1.Assembly method has a little to be used it is noted that playing self-tapping screw 8 The pneumatic screw batch or electric screwdriver of moment of torsion are determined, so that moment of torsion is rationally uniform;Originally the waste product of prescribed torque is not more.Because institute The improvement for a kind of low vibration grass-mowing machine stated, it includes the telescopic rod assembly of middle and upper part mobile jib adjustable length, by being pressed containing flexible The telescopic tube assembly 13 of knob and snap-on, pipe close 13-1, capacitance 13-2, telescopic tube 13-3, spring cable line 13-4, rotation branch Frame 13-5, pipe end positioning rubber plug 13-6, tapping screw 13-7, rotation button spring 14 are formed;It is described containing flexible button and The upper end of the telescopic tube assembly 13 of snap-on is equipped with the pipe close 13-1, and is fixed on by the handle upper casing 3-1 and handle On the handle that mono- the first from left right sides of lower casing 3-2 attach together;13 internal activity of telescopic tube assembly containing flexible button and snap-on is equipped with The telescopic tube 13-3;The capacitance 13-2 and spring cable line 13- are placed with inside the telescopic tube 13-3 4;The runing rest 13-5, pipe end positioning rubber plug 13-6, tapping screw are housed in the lower part of the telescopic tube 13-3 13-7 and rotation button spring 14;It is recessed that the outside of the telescopic tube assembly 13 containing flexible button and snap-on is equipped with axial length Groove, can allocate the assist handle 16 and assist handle stent 17 of position vertically in order to install;Again because described stretch Draw 13-3, refer to Figure 14, which is provided with elongated slot 13-3b vertically, and multiple such as 12 gear 13-3c, institute so as to Matched in the telescopic tube assembly 13 containing flexible button and snap-on.Push described flexible containing flexible button and snap-on Flexible button and the snap-on 13-3d that tube assembly 13 is equipped with, carrys out optional gear with regard to that can pull out into the extraction telescopic tube 13-3, It is transferred to the grass-mowing machine working depth that operator is liked.
Because a kind of improvement of low vibration grass-mowing machine, its runing rest assembly containing turnback is general comprising two Read, one is the runing rest assembly for being turned by the runing rest 13-5 grass-mowing machine lower part 180 degree, the other is making auxiliary The assist handle bracket assembly of assistant's handle turnback.Again because the assist handle bracket assembly, by hex nut 15-1, Knob 15-2, assist handle 16, assist handle stent 17, hexagon-headed bolt 18 are formed;The assist handle stent 17 is lived The dynamic outside for being installed on the telescopic tube assembly 13 containing flexible button and snap-on, and provided axial long recess phase Match somebody with somebody, and on the assist handle stent 17, Fig. 2 and Figure 16 is refer to, equipped with hex nut 15-1, knob 15-2, auxiliary Handle 16, elastic knob 15-2, so assist handle 16 and assist handle stent 17 can be allocated, to position smoothly vertically. Because the runing rest assembly for turning grass-mowing machine lower part 180 degree by runing rest 13-5, is by the rotation branch Frame 13-5 forms a connecting link, i.e., on hold telescoping tube, under open grass-mowing machine lower casing, refer to Figure 12 and Figure 13;Described The lower part of telescopic tube 13-3 is equipped with the runing rest 13-5, pipe end positioning rubber plug 13-6, tapping screw 13-7 and rotation Button spring 14, and Fig. 3, Fig. 4 and Fig. 5;Again because the runing rest assembly containing turnback, protective cover is further included 19, steel wire 20 is protected, compresses piece 21, tapping screw 22, foaming ring 23, and the motor chassis upper casing 30-1 of its connection, motor Casing lower casing 30-2, rotates knob 31;The runing rest 13-5 is equipped with the macropore 13-5a of oval, is additionally provided with limited block 13-5b, institute is in order to loading telescoping tube.Again because runing rest 13-5 is in motor chassis, and it is engaged with rotation knob 31, So when pressing rotation knob 31, just move down the limited block 13-5b of runing rest 13-5, then can be by the telescopic tube 13-3 goes to 180 degree;When unclamping rotation knob 31, rotation button spring 14 moves up the limited block 13-5b of runing rest 13-5, It then can still block telescoping tube 13-3.Because in the end of telescoping tube 13-3, equipped with square through hole, with limited block 13-5b, referring to figure 14, because being that through hole just has two holes.
Because a kind of improvement of low vibration grass-mowing machine, it contains motor assembly, by electric machine assembly 24, motor 24- 1, pipe sleeve 24-2, wire box base 24-3 are supported, hex nut 24-4, safety cap 24-5 are formed, volume compact, so being easy to pacify Dress.Because a kind of improvement of low vibration grass-mowing machine, the flake down of its base containing wire box is beaten the grass assembly, by solenoid component 25, Reel spring 25-1, machine tooth screw 25-2, reel 25-3, nylon wire 25-4, reel aluminium head 25-5, line eye inserted sheet 25- 6, wire box upper cover 25-7, the line bag blister 25-8 with blister labeling, blade 27, machine tooth screw 28, hex nut 29 are formed, its The middle line bag blister 25-8 with blister labeling is only used as packaging, and because a kind of improvement of low vibration grass-mowing machine, its Containing housing assy above and below motor chassis, by shell component above and below motor chassis 30, motor chassis upper casing 30-1, motor chassis lower casing 30-2 , knob 31 is rotated, and the additional foamed material 30-3 of motor is formed, and a kind of improvement of low vibration grass-mowing machine, it is containing attached Belong to component, be made of safety goggles 32, shoulder belt 33, spare nylon wire 34, extended line 35, install grass-mowing machine so working as, and open Dynamic the nylon wire 25-4 made in reel 25-3 or siding rotate at a high speed, with regard to that can beat the grass.When line in short-term, operator's pier pressure one Under, reel aluminium head 25-5 touches ground, compresses reel spring 25-1, and turns reel 25-3, makes the nylon wire 25- in it 4 logical wire over inserted sheet 25-6, and unwrapping wire.The long line released is trimmed by blade 27.Blade sleeve 26 is placed on blade when not used On 27, there is protective action.
Because the present invention provides a kind of improved safety circuit added with insurance protection of low vibration grass-mowing machine.Described one The improvement of kind of low vibration grass-mowing machine, it contains the safety circuit added with insurance protection, referring to circuit diagram as shown in figure 21, by Insure RC, switch K, inductance L3, inductance L4, capacitance C, and the series excited machine M equipped with winding L1 and winding L2 is formed;It is described Circuit diagram in inductance L3 and inductance L4, equal Mining inductance 7-2 as shown in figure 18;The present invention specially added with insurance RC, its With fuse, or with electrothermal relay, or with overcurrent protector, in the hope of safer.Why it is interior insured, also to add insurance Because power supply source also supplies many places, it insures often too greatly, does not fit into this grass-mowing machine.
Because a kind of improvement of low vibration grass-mowing machine, its additional foamed material containing motor subtract vibration arrangement, are The major contribution of the present invention, is inside and outside motor chassis upper casing 30-1 and motor chassis lower casing 30-2 and outside motor, added with damping With deadener 30-3, meanwhile, in motor chassis upper casing 30-1 and motor chassis lower casing 30-2 and motor close to assembly of beating the grass Appropriate location, as shown in figure 20, install shock-absorbing and noise-eliminating material 30-3 additional.The material 30-3, or the metallic fiber with heatproof, Or nonmetallic materials, filling or half filling.Or the sound-absorbing material particularly sound-absorbing porous material with resistance to medium temperature, or flexible material, And film material;The porous material can be fiber-like, and foam class, particulate species are alone good, more or less mixing application OK.Usable fibers class such as rock wool, or glass fiber, or mineral wool particularly super glass wool;Or with foam class, fireproof;Or With particulate species such as expanded perlite, porous clay brick, and the fabric of heatproof, felt are filled or attached;Due to the sound absorption of each material Coefficient (standing-wave-tube method acoustic absorptivity, reverberation method acoustic absorptivity) is different, and incident angle also has an impact acoustic absorptivity, and some is to height Frequency sound absorption is preferable, and some is preferable to Low Frequency Sound Absorption, and multiple material has the efficiency of complementation, and vibration involves noise and reflected, and turns Change, absorb, decay, therefore be conducive to further improved performance index, the shock-absorbing and noise-eliminating material, moreover it is possible to be added in the more of grass-mowing machine Place such as protective cover 19, runing rest assembly, have improvement, noise reduction, which has, to be changed so can integrate composition one kind and can reach effectiveness in vibration suppression Into low vibration grass-mowing machine.Shock-absorbing and noise-eliminating material 30-3 or stickup, or mixing molding.
Because employing a kind of improved another item important offer of the present invention to low vibration grass-mowing machine, manufacture is as improved And the method containing laser of assembling precision, that is, improve motor and wire box base concentricity and survey dynamically balanced existing precision Moulding part has the improved method that laser sights frock again, so having passed through dynamic balancing measurement.First, improved from layout design Requirement to geometric tolerance, such as the requirement to motor and wire box base concentricity, also increase motor and wire box base mistake The amount of being full of, then pressed with reinforcing frock clamp;Moreover precision die is prepared with numerical control CNC machining centers, and to plastic such as wire box bottom Seat is post-processed, its main method is to use high-temperature vapour method, is such as steamed enough more than three hours, therefore its plastic part size is unlikely to deform away Sample;Secondly, it is to improve motor and wire box base concentricity, during assembling, using calibration motor and wire box base as shown in figure 22 Concentricity has the frock press that laser is sighted, therefore reduces vibrations.Because described has the frock that laser is sighted, by press 41, laser sights first 42,44,2 middle cylinders 43 of motor locating piece, wire box base locating piece 46, small cylinder 45 and small cylinder 47, and laser sights first 48, laser sights first 49 and laser sights first 50 and workpiece motor 24-1 and wire box base 24-3 is total to With composition;The top of the press 41, sights first 42, to sight electrical axis equipped with laser;In the press 41 Portion, the motor locating piece 44 equipped with left and right each one, and be servo-actuated respectively by one of 2 middle cylinders 43;The downside of the press 41 Portion, the wire box base locating piece 46 equipped with left and right each one, and be servo-actuated respectively by small cylinder 45 and small cylinder 47, the press 41 Leave from office portion, center sights first 50 equipped with laser, the position of the alignment line box base locating piece of both sides, swashing equipped with left and right each one Illumination accuracy 48 and laser sight first 49;As an improvement, the locating piece 46 and locating piece 44 or equipped with pressure sensor, Each laser is sighted head and the signal parameter of each locating piece and pressure sensor and is servo-actuated by CNC processing or differential signal through nozzle flapper Mechanism performs.Motor and wire box base concentricity it is calibrated and with this frock press after, and through bulk sampling survey dynamic balancing amendment Producing line can be just gone up, last complete machine, which will also sample, surveys dynamic balancing, therefore because being aided with many places shock-absorbing and noise-eliminating material, cause synthesis to constitute one Kind has improved low vibration grass-mowing machine.
A kind of improved another item important offer of the present invention to low vibration grass-mowing machine, is for line changing in itself of beating the grass Into.Sometimes when operator has found that convex block will stretch out line in pressing, but often there is the phenomenon that nylon wire blocks.Its main cause it First, in addition to being designed with and want improvements of runner, also have one it is important the reason for be line in itself.Because existing line, including circle Line and square or lineae trapezoidea, all there is card line phenomenon once in a while.Line that is particularly square or diamond-shaped cross-section and twisting into screw thread sample, although There is certain noise-decreasing when high speed rotates, therefore be also referred to as special-shaped low-noise line, but because of its square or diamond shape point The stupefied side of profit, causes the Le on linear window that goes out of runner sheath to grind narrow groove, so as to cause the phenomenon that nylon wire blocks occur; The present invention provides a kind of nylon outlet of the improvement of grass-mowing machine, alternatively referred to as grass-mowing machine abnormity non-symmetric line.The present invention is taken Technical solution be:A kind of more line of rabbet joint of grass-mowing machine abnormity, the special-shaped line are characterized in being provided with multiple asymmetry on its section Notch 34a, the notch are circumferentially not uniformly distributed into decile;The notch is not square, but both sides are not parallel And indention, and slot bottom is camber, therefore it is beneficial to the noise reduction beaten the grass, and adapt to the mowing kind of different soft and hard.
According to different type and actual needs, nylon wire (25-4) and spare nylon wire (34) can be selected;Insure (RC) Majority uses fuse, also selects electrothermal relay or overflowing device.
Has the gardens machine of lithium cells Voltage unbalance detection process circuit, it is characterised in that supply lithium battery charging Voltage is not the DC charging of traditional constant pressure and flow, but by the rectified voltage of lithium battery charging circuit and by being originally intended to Produced by multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of spark-erosion machine tool is drawn Multi resonant superimposed voltage as charged in the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula.
Usefulness:Have lithium cells Voltage unbalance detection process circuit gardens machine, its ji containing process circuit and Control unit and voltage transformation module and temperature monitoring circuit:To linear regulator chip by way of pulse width modulation (PWM) Voltage is provided, ensures voltage stabilizing chip safety;Supply lithium battery charging voltage is not the DC charging of traditional constant pressure and flow, but The arteries and veins drawn by the rectified voltage and the astatic multivibrator by being originally intended to spark-erosion machine tool of lithium battery charging circuit Multi resonant superimposed voltage caused by rushing the multi resonant superimposed voltage element circuit mixed by voltage passes through lithium such as multiple spot acupuncture formula The hole of the storage electric charge of the inside of battery and charge, fast and safety and power is big.Comprehensive composition one kind can reach effectiveness in vibration suppression There is an improvement, noise reduction has an improved low vibration grass-mowing machine, evolutionary operation, lifts the quality and frock usability of product, and Safety in utilization.Electronic beat the grass for what the place such as beside flower bed, garden, park and road cut the grass on a lawn the present invention relates to a kind of Machine, especially a kind of improvement of low vibration grass-mowing machine, includes the telescopic rod of grass-mowing machine middle and upper part mobile jib adjustable length, turns 180 Runing rest is spent, and circuit adds insurance, the foamed plastics that the additional vibration damping of motor moves, double acting switch positions the improvement slided, and Improve motor and wire box base concentricity and have the charging grass-mowing machine of lithium battery multi resonant superimposed voltage composite portfolio element circuit.One The more line of rabbet joint of kind grass-mowing machine abnormity, the special-shaped line are characterized in being provided with multiple asymmetric notches (34a) on its section, have a variety of Various edge of a knife is selected, to adapt to the mowing kind of different soft and hard;Has lithium battery multi resonant superimposed voltage composite portfolio element circuit Charge grass-mowing machine, it contains single chip control unit:By the way of reserve battery protection chip is combined with single chip control unit, Make circuit stability reliable, ensure that battery can work normally under various conditions, the single chip control unit is as computing control Center processed, is responsible for the various analog signals for ensureing normal battery operation of sampling, and changes digital signal required in order to control, error Small, precision is high, chip strong antijamming capability, simplifies hardware circuit design and reduces the ineffectiveness high phenomenon of hardware circuit.
Has the gardens machine of lithium battery single chip control unit circuit, it contains single chip control unit:
The design enables the design circuit steady by the way of reserve battery protection chip is combined with single chip control unit Fixed reliable work, ensures that battery can work normally under various conditions, single chip control unit as operation control center, It is responsible for the various analog signals for ensureing normal battery operation of sampling, and changes digital signal required in order to control, error is small, precision Height, chip strong antijamming capability is stable and reliable in work, simplifies hardware circuit design and reduction the ineffectiveness high of hardware circuit shows As.
Has the gardens machine of lithium battery single chip control unit circuit, it contains voltage transformation module:
By battery pack voltage step-down by way of PWM, voltage is provided to linear regulator chip, ensures voltage stabilizing chip work In the range of safe voltage, circuit advantage:PWM is depressured, and reduces power, cancels powerful dropping resistor, improves transfer efficiency, And reduce related elements fever.
Circuit conversion principle:
When Q33 triode ONs, the total positive voltage BAT+ of battery pack is returned again by triode Q33, inductance L1, capacitance EC2 The total negative terminal of battery is returned to, forms charge circuit, BAT+ charges, to maintain load end after inductance partial pressure to capacitance EC2 The electric quantity consumption of VDD5V, while L1 is in energy storage state, during charging, EC2 capacitance voltages are gradually increasing, and work as voltage When rising to Z9 zener diode breakdown voltages, Z9 conductings, Vbe conducting voltages, Q36 saturation conductions, so as to drag down are provided to Q36 Triode Q35 base voltages, cause Q35 to be switched to cut-off state by conducting state, before Q35 cut-offs, the Vbe magnitudes of voltage of Q33 are:
Vbe=VBAT+*R114/ (R114+R116)
This magnitude of voltage is more than the on state threshold voltage of Q33, ensures Q33 conductings, after Q35 cut-offs, the Vbe=0 of Q33, Q33 are cut Only, battery always passes through inductance L1 and charges to EC2 capacitances and terminate to the stage of VDD5V power supplies;
When Q33 triodes turn off, disconnected from triode to the charge circuit inductance L1, cannot according to L inductive currents The principle of mutation, to maintain current direction and size constant, the direction transformation of the induced electromotive force of inductance is right positive left negative, inductance In the state to release energy, current channel is:Electric current flows to capacitance EC2 from L1, charges to EC2, for maintaining load end The electricity that VDD5V is consumed, then from cross GND ends by sustained diode 10, D11 return inductance induced electromotive force negative terminal,
Has the gardens machine of lithium battery single chip control unit circuit, it contains charging control unit:
Effect:There is the overvoltage of charging stagnation pressure, single-unit battery core, charging overcurrent, excess temperature or charger in battery pack and exception occur When, single chip control unit turns off charge tunnel, ensures charging safety by controlling this element circuit.
Concrete operating principle is as described below:
Under battery pack normal charging condition, single chip control unit output high level CHG_CTR signals by R162, Q26G poles are added in after R161 partial pressures, the conducting of Q26MOS pipes, ignores D, S side pressure drop, pass through resistance from the S ends of MOS1, MOS2 The electric current IQ that R159, R160 flow through is:
IQ=VPACK/ (R159+R160)
Then the voltage at resistance R159 both ends is:
VR159=IQ*R159
This voltage is G, S terminal voltage of MOS, and magnitude of voltage is less than threshold voltage VGS, turns on MOS1, MOS2, is entered Charged state;
Z11 voltage-stabiliser tubes are connected in parallel on PMOS tube G, S end, and when exception, which occurs, in circuit causes G, S end excessive, Z11 voltage-stabiliser tubes move Make, by G, S terminal voltage clamper in the safe operating voltage range of 16V, avoid pipe breakdown;
In battery pack charge or discharge, the instantaneous pressure of charger or motor work generation is superimposed upon MOS1, MOS2 D, S ends, puncture MOS, cause battery pack disabler, C98, C99 capacitance are connected in parallel on D, S end of MOS1, MOS2 respectively, are moment High pressure provides passage, protects MOS work safetys;
Z18, Z12 are ESD electrostatic protection elements, absorb in machine system work and scurry into the instantaneous pressure energy in battery, Protect electronic component safety in MOS and battery pack;
In battery pack charging process, chip is such as protected to detect battery core overvoltage, excess temperature or battery pack stagnation pressure higher than setting During voltage, CHR_CTR network signals are set to low level by battery pack control chip single chip control unit, and triode Q26 is by leading Logical state is switched to cut-off state, and the VGS voltages of MOS1, MOS1 are zero at this time, less than metal-oxide-semiconductor conducting voltage VTH, forces two Metal-oxide-semiconductor turns off, and stops charging, to ensure battery pack charging safety;
Has the gardens machine of lithium battery single chip control unit circuit, it contains cell voltage detection unit:
When battery pack is in charging, charge condition, single chip control unit can detect battery pack voltage in real time, with protection Battery pack is operated in normal condition,
Concrete operating principle is as follows:
When single chip control unit is by detecting analog signal (this analog signal of R155, R156 partial pressure battery pack stagnation pressure Value be proportional to voltage bag total voltage), and obtained analog signal is passed through into analog-to-digital conversion, set by single chip control unit Threshold value compare, and perform corresponding action according to comparing,
Wherein C80 filters out the interference signal of the pressures of R156 two, so as to the accurate sampling battery voltage signal of single chip control unit.
The magnitude of voltage sampled such as single chip control unit is higher than set charging voltage threshold value, then illustrates at battery pack Overvoltage condition, at this time single chip control unit charge control CHR_CTR network signals can be set to low level, forcibly stop Battery pack charges, and the magnitude of voltage sampled such as single chip control unit is less than set charging voltage threshold value, then illustrates battery In under-voltage condition, battery under-voltage signal communicatively can be sent to discharge controller by single chip control unit at this time, Stop battery pack electric discharge.
When battery pack in a dormant state when, BAT_AD_CTR network signals are set to low level by single chip control unit, Q25 metal-oxide-semiconductors are switched to cut-off state by conducting state, prevent battery pack from discharging by sampling resistor, reduce battery pack free time shape Kwh loss during state
Have the gardens machine of lithium battery single chip control unit circuit, its temperature detecting unit containing battery core:
For battery pack when charge or discharge work, operating current is very big, and battery core temperature rises, to make in suitable temperature model Interior battery core work is enclosed, temperature sensing circuit is employed in the design;Temperature detecting function is anti-based on what is inputted from battery pack The analog signal of battery temperature information is answered to monitor battery temperature, single chip control unit passes through the analog signal sampled interior Portion's analog to digital conversion circuit is converted to the digital signal that single chip control unit can identify, specifically, comparative cell temperature detection The magnitude of voltage of signal and low temperature threshold and high temperature threshold value, also, it is bigger than low temperature threshold in the magnitude of voltage of battery temperature detection signal Or it is smaller than high temperature threshold value in the case of, the temperature for being judged as battery is abnormality;
The thermal resistor used in the design is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is got over Height, the resistance value of temperature-sensitive is smaller, then the magnitude of voltage for the battery temperature signal that single chip control unit detects is smaller, therefore, when When battery temperature signal magnitude of voltage is bigger than the low temperature threshold that single chip control unit is set, illustrate battery temperature less than the temperature set Angle value, it is meant that battery temperature is low temperature, and battery temperature abnormal signal is set to high level by single chip control unit, on the contrary, When the value of battery temperature detection signal is smaller than high temperature threshold value, then mean that battery is in the condition of high temperature, single chip control unit Battery temperature abnormal signal is set to high level;
Other single chip control units are different in the battery temperature that the single chip control unit for receiving battery pack is sent in system During normal information, battery pack charge or discharge control is set forcibly to stop.
Concrete operating principle is as described below:
When single chip control unit is by detecting R179, NTC1;The battery temperature simulation letter that R156, NTC2 partial pressure obtain Number, and obtained analog signal is passed through into analog to digital conversion circuit, the digital signal that single chip control unit can identify is converted to, with Threshold value set by single chip control unit compares, when the temperature value detected higher than low temperature threshold or less than high temperature threshold value or When, the temperature for being all judged as battery is abnormality, and single chip control unit makes battery pack be stopped by control signal, its In, C82, C94 filter out the interference signal at NTC1, NTC2 both ends respectively, so as to the accurate sampling battery temperature of single chip control unit Signal.
Because the temperature of each battery core of battery in real work can be variant, the design employs two-way temperature monitoring circuit, to the greatest extent The operating temperature situation of possible actual each battery.
Have the gardens machine of lithium battery single chip control unit circuit, its display unit containing battery status:
It is used as display device by four LED, by combinations of states, can correctly shows the voltage, electricity, temperature of battery Degree and battery whether unusual condition etc., can judge the working status residing for battery accordingly.
Has the gardens machine of lithium battery single chip control unit circuit, supply lithium battery charging voltage is not traditional constant pressure The DC charging of constant current, it is more by the rectified voltage of lithium battery charging circuit and the self-excitation by being originally intended to spark-erosion machine tool Multi resonant superimposed voltage caused by multi resonant superimposed voltage element circuit mixed by the pulse voltage that harmonic oscillator is drawn as The hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula is charged;The astatic multivibrator is drawn Pulse voltage be 80 volts, pulse frequency be 80 kilo hertzs;Electricity between the voltage of the rectification and the pulse voltage by connecting Appearance is connected with the differential circuit that bypass resistance is formed.Has the gardens machine of lithium battery voltage converter unit circuit, its feature exists In it contains voltage transformation module:By battery pack voltage step-down by way of PWM, voltage is provided to linear regulator chip, is ensured Voltage stabilizing chip is operated in the range of safe voltage, cancels powerful dropping resistor, improves transfer efficiency, and reduce related elements Fever, circuit conversion principle:When Q33 triode ONs, the total positive voltage BAT+ of battery pack passes through triode Q33, inductance L1, electricity Hold EC2 and again return to the total negative terminal of battery, form charge circuit, BAT+ charges after inductance partial pressure to capacitance EC2, to maintain The electric quantity consumption of load end VDD5V, while L1 is in energy storage state, during charging, EC2 capacitance voltages are gradually increasing, When voltage rises to Z9 zener diode breakdown voltages, Z9 conducting, give Q36 provide Vbe conducting voltages, Q36 saturation conductions, from And triode Q35 base voltages are dragged down, and cause Q35 to be switched to cut-off state by conducting state, before Q35 cut-offs, the Vbe electricity of Q33 Pressure value is:Vbe=VBAT+*R114/ (R114+R116), this magnitude of voltage are more than the on state threshold voltage of Q33, ensure that Q33 is led Logical, after Q35 cut-offs, the Vbe=0 of Q33, Q33 cut-off, battery always pass through inductance L1 and charge to EC2 capacitances and supplied to VDD5V The stage of electricity terminates;When Q33 triodes turn off, disconnected from triode to the charge circuit inductance L1, according to L inductive currents The principle that cannot be mutated, to maintain current direction and size constant, the direction transformation of the induced electromotive force of inductance is negative for a right positive left side, Inductance is in the state to release energy, and current channel is:Electric current flows to capacitance EC2 from L1, charges to EC2, for maintaining to load The electricity that end VDD5V is consumed, then pass through sustained diode 10, the negative terminal of D11 return inductance induced electromotive forces from GND ends are crossed.
The gardens machine of improved tool lithium battery single chip control unit circuit, it becomes containing single chip control unit and voltage Change unit and temperature monitoring circuit:Voltage is provided to linear regulator chip by way of pulse width modulation (PWM), ensures voltage stabilizing Chip secure;Supply lithium battery charging voltage is not the DC charging of traditional constant pressure and flow, but by lithium battery charging circuit Rectified voltage and the pulse voltage drawn of the astatic multivibrator as being originally intended to spark-erosion machine tool mixed by it is more Multi resonant superimposed voltage is such as the storage of the inside by lithium battery of multiple spot acupuncture formula caused by humorous superimposed voltage element circuit The hole of electric charge and charge, fast and safety and power is big.It contains voltage transformation module, by way of pulse width modulation (PWM) By battery pack voltage step-down, voltage is provided to linear regulator chip, ensures that voltage stabilizing chip is operated in the range of safe voltage, circuit Feature:PWM is depressured, and reduces power, cancels powerful dropping resistor, improves transfer efficiency, and reduces related elements fever; Beneficial effect is a kind of high-power charging of energy of comprehensive composition and safe charging, and reaching effectiveness in vibration suppression has improvement, and noise reduction, which has, to be changed Into the dual-purpose type of low vibration, evolutionary operation, lifts the quality of product and frock usability, and safety in utilization.
Has the gardens machine of lithium battery single chip control unit circuit, it supplies lithium battery charging voltage and is superimposed electricity with multi resonant The DC charging of pressure rather than traditional constant pressure and flow, it is by the rectified voltage of lithium battery charging circuit and by being originally intended to Produced by multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of spark-erosion machine tool is drawn Multi resonant superimposed voltage as charged in the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula;It is described from It is 88 volts to swash the pulse voltage that multivibrator is drawn, and pulse frequency is 88 kilo hertzs;The voltage of the rectification and the pulse It is connected between voltage by the capacitance connected with the differential circuit that bypass resistance is formed;The tool lithium battery charging control unit The gardens machine of circuit contains charging control unit, and it is in the overvoltage of battery pack appearance charging stagnation pressure, single-unit battery core that it, which is acted on, was charged When stream, excess temperature or charger occur abnormal, single chip control unit turns off charge tunnel, ensures by controlling this element circuit Charging safety;Concrete operating principle is as follows:Under battery pack normal charging condition, the high level of single chip control unit output For CHG_CTR signals by being added in Q26G poles after R162, R161 partial pressure, the conducting of Q26MOS pipes, ignores D, S side pressure drop, from MOS1, The electric current IQ that the S ends of MOS2 are flowed through by resistance R159, R160 is:IQ=VPACK/ (R159+R160), then resistance R159 both ends Voltage be:VR159=IQ*R159, this voltage is G, S terminal voltage of MOS, and magnitude of voltage is less than threshold voltage VGS, makes MOS1, MOS2 are turned on, into charged state;Z11 voltage-stabiliser tubes are connected in parallel on PMOS tube G, S end, cause G, S when exception occurs in circuit When holding excessive, the action of Z11 voltage-stabiliser tubes, by G, S terminal voltage clamper in the safe operating voltage range of 16V, avoids pipe from being hit Wear;When battery pack charges or puts, the instantaneous pressure of charger or motor work generation is superimposed upon D, S end of MOS1, MOS2, hits MOS is worn, causes battery pack disabler, C98, C99 capacitance are connected in parallel on D, S end of MOS1, MOS2, are provided for instantaneous pressure respectively Passage, protects MOS work safetys;Z18, Z12 are ESD electrostatic protection elements, absorb and are scurried into machine system work in battery Instantaneous pressure energy, protects electronic component safety in MOS and battery pack;In battery pack charging process, chip detecting is such as protected To battery core overvoltage, excess temperature or battery pack stagnation pressure higher than setting voltage when, battery pack control chip single chip control unit is by CHR_ CTR network signals are set to low level, and triode Q26 is switched to cut-off state by conducting state, at this time the VGS electricity of MOS1, MOS1 Pressure is zero, less than metal-oxide-semiconductor conducting voltage VTH, forces two metal-oxide-semiconductors to turn off, stops charging, to ensure battery pack charging safety.
Has the gardens machine of lithium battery single chip control unit circuit, it supplies lithium battery charging voltage and is superimposed electricity with multi resonant The DC charging of pressure rather than traditional constant pressure and flow, it is by the rectified voltage of lithium battery charging circuit and by being originally intended to Produced by multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of spark-erosion machine tool is drawn Multi resonant superimposed voltage as charged in the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula;It is described from It is 99 volts to swash the pulse voltage that multivibrator is drawn, and pulse frequency is 99 kilo hertzs;The voltage of the rectification and the pulse It is connected between voltage by the capacitance connected with the differential circuit that bypass resistance is formed;The tool lithium battery electric core temperature detection The gardens machine of element circuit, its temperature detecting unit containing battery core:For battery pack when charge or discharge work, operating current is very big, Battery core temperature rises, and to make the battery core within the scope of suitable temperature work, temperature sensing circuit is employed in the design;Temperature is examined Brake is to monitor battery temperature, microcontroller control based on the analog signal of the reaction cell temperature information inputted from battery pack The analog signal sampled is converted to the numeral that single chip control unit can identify by unit processed by internal analog to digital conversion circuit Signal, magnitude of voltage and low temperature threshold and the high temperature threshold value of comparative cell temperature detection signal, also, detect signal in battery temperature Magnitude of voltage it is bigger than low temperature threshold or smaller than high temperature threshold value in the case of, the temperature for being judged as battery is abnormality;The design The middle thermal resistor used is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is higher, the resistance of temperature-sensitive It is worth smaller, then the magnitude of voltage for the battery temperature signal that single chip control unit detects is smaller, therefore, when battery temperature signal electricity When pressure value is bigger than the low temperature threshold that single chip control unit is set, illustrate battery temperature less than the temperature value set, it is meant that electricity Pond temperature is low temperature, and battery temperature abnormal signal is set to high level by single chip control unit;On the contrary, when battery temperature detects When the value of signal is smaller than high temperature threshold value, then mean that battery is in the condition of high temperature, single chip control unit is abnormal by battery temperature Signal is set to high level;The battery that other single chip control units are sent in the single chip control unit for receiving battery pack in system During temperature anomaly information, battery pack charge or discharge control is set forcibly to stop;Concrete operating principle is as follows:When microcontroller control Unit processed is by detecting R179, NTC1;The battery temperature analog signal that R156, NTC2 partial pressure obtain, and obtained simulation is believed Number pass through analog to digital conversion circuit, the digital signal that single chip control unit can identify is converted to, set by single chip control unit Fixed threshold value compares, when the temperature value detected higher than low temperature threshold or less than high temperature threshold value or when, be all judged as battery Temperature is abnormality, and single chip control unit makes battery pack be stopped by control signal, wherein, C82, C94 are filtered respectively Except the interference signal at NTC1, NTC2 both ends, so as to the accurate sampling battery temperature signal of single chip control unit;Because of real work The temperature of middle each battery core of battery can be variant, and the design employs two-way temperature monitoring circuit, as far as possible each battery of actual monitored Operating temperature situation, it is safe to use, get twice the result with half the effort.
Usefulness:
Have the gardens machine of lithium battery single chip control unit circuit, its display unit containing battery status:Pass through four LED As display device, by combinations of states, the whether abnormal shape of voltage, electricity, temperature and battery of battery can be correctly shown Condition, can have this and judge working status residing for battery, very clear.Supply lithium battery charging voltage multi resonant superimposed voltage as The hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula is charged;The astatic multivibrator pulse voltage For secondary 88 volts, pulse frequency is 88 kilo hertzs;By the capacitance connected and bypass between the voltage of the rectification and the pulse voltage The differential circuit that resistance is formed is connected, beneficial to the high-power use of safety;Two-way temperature monitoring circuit is employed, ensures voltage stabilizing core Piece safety;Safety in utilization is improved, effect is self-evident;Ensure voltage stabilizing chip safety;Charging is fast and safety and power is big, comprehensive Composition effect of vibration and noise reduction has the serial gardens machine of improvement, a tractor serves several purposes, lifts the quality of exported product.
Have the gardens machine of lithium battery single chip control unit circuit, be further characterized in that, supply lithium battery charging voltage With multi resonant superimposed voltage rather than the DC charging of traditional constant pressure and flow, it is the rectified electricity by lithium battery charging circuit The multi resonant superimposed voltage list mixed by pulse voltage that pressure and the astatic multivibrator as being originally intended to spark-erosion machine tool are drawn Multi resonant superimposed voltage caused by first circuit as the inside by lithium battery of multiple spot acupuncture formula storage electric charge hole and Charging;The pulse voltage that the astatic multivibrator is drawn is 88 volts, and pulse frequency is 88 kilo hertzs;The electricity of the rectification Pressure is connected with the differential circuit being made of between the pulse voltage the capacitance and bypass resistance connected;The tool lithium battery The gardens machine of status display unit circuit, its display unit containing battery status, is used as display device by four LED, passes through shape State combines, can correctly show battery voltage, electricity, temperature and battery whether unusual condition etc., can judge battery institute accordingly The working status at place;Have the gardens machine of lithium cells Voltage unbalance detection process circuit, be further characterized in that, it is containing lithium electricity Pool unit Voltage unbalance detection process circuit, there is the uneven detection of battery cell voltage and Balance Treatment function;The design electricity The balancing technique of the unbalanced detection function of road single-unit battery core and intelligence, concrete operating principle are as follows:Protect chip real time monitoring The analog signal for each battery core that the battery assembly module of five string battery core compositions comes, detection port network name are respectively:BAT1、 BAT2, BAT3, BAT4, BAT5, each port are connected in parallel on the both ends of each single-unit battery core in battery pack respectively, and protection chip is held Row equilibrium function, it is necessary to meet the following conditions:Under battery pack charging or holding state, at least one economize on electricity core voltage is higher than core During the threshold voltage VCB for the startup battery core balance of voltage function that piece is set, at least one economize on electricity core voltage is electric less than battery core is started The threshold voltage VCB of equilibrium function is pressed, can not there is the protection event such as battery core overcurrent, excess temperature, short circuit, battery core overvoltage, single-unit Except battery core low-temperature protection, then start balance of voltage function, protect the specific balance of voltage function of chip unit itself, but consider Balanced balanced current can cause chip to generate heat, and the design uses external circuit balancing technique, is controlled by protection location, passes through external electrical Road carries out the battery core balance of voltage, is greatly improved balanced balanced current, effectively achieves the mesh of the balance of voltage, while reduces protection location Fever, make the work that chip is more reliable;When protection chip BAT5 Port detectings are higher than VCB to CELL5, battery core balance is electric at this time Flow shown in equation below:Ib=Vcell5/R16, formula;Ignore the saturation voltage drop Vce of triode Q1;In order to make balancing circuitry just Often work, the following conditions must are fulfilled for:PMOS between chip internal BAT5 and BAT4 is opened, CELL20 by resistance R21, Chip internal switch, R22 form the discharge loop of Vcell5, and loop current expression formula is at this time:
Ib1-Vcell/ (R36+RDS+R37), formula 1, RDS are chip internal PMOS switch equivalent resistance;
To ensure triode Q16 saturation conductions, then:VBE+IB*R56≤VR37, formula 2;
Wherein, VBE is much larger than IB*R56, and above formula is reduced to:VBE≤VR37, formula 3;
IB-Ib1/ β, formula 4;
VBE Wei tri- E pipe on state threshold voltages, β are the current amplification factor of triode Q16;
Then the voltage of R37 resistance is reduced to:VR37=(Ib1-IB) * R37, formula 5;
Calculated by formula 1- formula 5, the resistance value of suitable R37, the electricity for making balanced balanced current be formed at R37 both ends may be selected Pressure,
The sum of voltage drop in VBE voltage drops and R56 more than Q16, ensure that Q1 is reliably turned on, reach execution battery core and put down The purpose of weighing apparatus;Protection chip can periodically detect battery core balance of voltage condition, when meeting battery core balance of voltage condition, protection Odd number economize on electricity core and even number economize on electricity core voltage in five string battery units where chip wheel mobile equilibrium, i.e., within an equilibration period The battery core of all odd number sections is balanced, next cycle then balances the battery core of even number section, even if only a battery core needs to balance, Next equilibration period will not perform equilibrium function;Battery core balance can be suspended during battery core voltage is detected;When five string batteries When all battery core voltages are all higher than or below start the threshold voltage VCB of battery core balance of voltage function in group unit, stop electricity Press equilibrium function;
A filter capacitor C24-C28 is placed between battery core voltage detecting port BAT1-BAT5 and ground network, with R21- R25 forms RC filter circuits, filters out the high-frequency interferencing signal at BATn ends, avoids battery core balancing circuitry from malfunctioning;The design is more The high-voltage battery component that a protection chip cascade uses, battery core balanced design is multiple protection chip linkage works, to ensure All battery core voltages of whole battery pack can balance;If the protection chip for being responsible for the string battery core of least significant end five is detected at battery When discharge condition, then stop all protection chip balance plays;If least significant end protection chip detected overvoltage, excess temperature, Short circuit then suspends the balance play of all protection chips when the event of protection occurs;If the electricity that certain grade of protection chip is responsible for When having the generation of under-voltage protection event in the string of pond, suspend the balance play in this battery pack, but not send a signal to other protections Chip stops balance play.When single chip control unit is by detecting R179, NTC1;The battery temperature that R156, NTC2 partial pressure obtain Analog signal is spent, and obtained analog signal is passed through into analog to digital conversion circuit, is converted to the number that single chip control unit can identify Word signal, compared with the threshold value set by single chip control unit, when the temperature value detected higher than low temperature threshold or is less than High temperature threshold value or when, the temperature for being all judged as battery is abnormality, and single chip control unit makes battery pack by control signal It is stopped, wherein, C82, C94 filter out the interference signal at NTC1, NTC2 both ends respectively, so that single chip control unit is accurate Sampling battery temperature signal;Because the temperature of each battery core of battery in real work can be variant, the design employs two-way temperature prison Circuit is controlled, energy closing to reality monitors the operating temperature situation of each battery;In battery pack charging process, such as chip is protected to detect When battery core overvoltage, excess temperature or battery pack stagnation pressure are higher than setting voltage, battery pack control chip single chip control unit is by CHR_CTR Network signal is set to low level, and triode Q26 is switched to cut-off state by conducting state, and the VGS voltages of MOS1, MOS1 are at this time Zero, less than metal-oxide-semiconductor conducting voltage VTH, force two metal-oxide-semiconductors to turn off, stop charging, to ensure battery pack charging safety.
Usefulness:Have the gardens machine of lithium battery single chip control unit circuit, there is the uneven inspection of battery cell voltage Survey and Balance Treatment function;The detection function of this circuit single-unit battery core and the balancing technique of intelligence, effect are self-evident.Has lithium electricity Its display unit containing battery status of the gardens machine of pool unit Voltage unbalance detection process circuit, is used as display by four LED Device, by combinations of states can correctly show battery voltage, electricity, temperature and battery whether unusual condition, can sentence accordingly The working status residing for pond is powered off, it is very clear.Supply lithium battery charging voltage multi resonant superimposed voltage rather than traditional perseverance The DC charging of constant current is pressed, it is drawn by the rectified voltage of lithium battery charging circuit and by astatic multivibrator Multi resonant superimposed voltage passing through such as multiple spot acupuncture formula caused by multi resonant superimposed voltage element circuit mixed by pulse voltage The hole of the storage electric charge of the inside of lithium battery and charge;Pulse voltage is 88 volts, and pulse frequency is 88 kilo hertzs;Rectified voltage with Mutually arranged in pairs or groups with the differential circuit that bypass resistance is formed by the capacitance connected between pulse voltage, beneficial to the high-power use of safety; Two-way temperature monitoring circuit is employed, ensures voltage stabilizing chip safety;Improve safety in utilization, significant effect;Ensure voltage stabilizing chip Safety;Charging is fast and safety and power is big, the gardens machine for having lithium cells Voltage unbalance detection process circuit, it is containing lithium electricity Pool unit Voltage unbalance detection process circuit, there is the uneven detection of battery cell voltage and Balance Treatment function;The design electricity The balancing technique of the unbalanced detection function of road single-unit battery core and intelligence, comprehensive composition effect of vibration and noise reduction have the serial garden of improvement Woods machine, a tractor serves several purposes, lifts the quality of exported product, world gardens machine of taking the lead in race.

Claims (1)

1. has the gardens machine of lithium battery single chip control unit circuit it is characterized in that, it contains single chip control unit and voltage not Balance detection process circuit, the mode combined with reserve battery protection chip with single chip control unit, makes circuit stability reliable, Ensure that battery can work normally under various conditions, the single chip control unit is responsible for sampling as operation control center The various analog signals for ensureing normal battery operation, and digital signal required in order to control is changed, error is small, and precision is high, chip Strong antijamming capability, simplifies hardware circuit design and reduces the ineffectiveness high phenomenon of hardware circuit;It contains voltage transformation module: By battery pack voltage step-down by way of pulse width modulation (PWM), voltage is provided to linear regulator chip, ensures voltage stabilizing chip It is operated in the range of safe voltage, electric circuit characteristic:PWM is depressured, and reduces power, cancels powerful dropping resistor, improves conversion Efficiency, and reduce related elements fever;Its circuit conversion principle:When Q33 triode ONs, the total positive voltage BAT+ of battery pack leads to Cross triode Q33, inductance L1, capacitance EC2 and again return to the total negative terminal of battery, form charge circuit, BAT+ after inductance partial pressure, Charge to capacitance EC2, to maintain the electric quantity consumption of load end VDD5V, while L1 is in energy storage state, during charging, EC2 capacitance voltages are gradually increasing, and when voltage rises to Z9 zener diode breakdown voltages, Z9 conductings, provide Vbe to Q36 and lead Be powered pressure, and Q36 saturation conductions, so as to drag down triode Q35 base voltages, cause Q35 to be switched to cut-off state by conducting state, Before Q35 cut-offs, the Vbe magnitudes of voltage of Q33 are:
Vbe=VBAT+*R114/ (R114+R116)
This magnitude of voltage is more than the on state threshold voltage of Q33, ensures Q33 conductings, after Q35 cut-offs, the Vbe=0 of Q33, Q33 cut-off, Battery always passes through inductance L1 and charges to EC2 capacitances and terminate to the stage of VDD5V power supplies;When Q33 triodes turn off, from three Pole pipe is disconnected to the charge circuit between inductance L1, the principle that cannot be mutated according to L inductive currents, to maintain current direction and size Constant, the direction transformation of the induced electromotive force of inductance is right positive left negative, and inductance is in the state to release energy, and current channel is: Electric current flows to capacitance EC2 from L1, charges to EC2, passes through for the electricity for maintaining load end VDD5V to be consumed, then from GND ends are crossed Sustained diode 10, D11 return to the negative terminal of inductance induced electromotive force;It contains charging control unit:It is total to there is charging in battery pack When pressing through pressure, single-unit battery core, charging overcurrent, excess temperature or abnormal charger appearance, single chip control unit is by controlling this element Circuit, turns off charge tunnel, ensures charging safety;Under battery pack normal charging condition, the height of single chip control unit output For level CHG_CTR signals by being added in Q26 G poles after R162, R161 partial pressure, the field-effect tube metal-oxide-semiconductor conducting of Q26, ignores D, S Side pressure drops, and the electric current IQ flowed through from the S ends of MOS1, MOS2 by resistance R159, R160 is:IQ=VPACK/ (R159+R160), Then the voltage at resistance R159 both ends is:This voltage of VR159=IQ*R159 is G, S terminal voltage of MOS, and magnitude of voltage is less than threshold Threshold voltage VGS, turns on MOS1, MOS2, into charged state;Z11 voltage-stabiliser tubes are connected in parallel on PMOS tube G, S end, when circuit occurs When exception causes G, S end excessive, the action of Z11 voltage-stabiliser tubes, by G, S terminal voltage clamper in the safe operating voltage range of 16V, keeps away It is breakdown to exempt from pipe;When battery pack charges or puts, the instantaneous pressure of charger or motor work generation is superimposed upon MOS1, MOS2 D, S end, puncture MOS, cause battery pack disabler, C98, C99 capacitance are connected in parallel on D, S end of MOS1, MOS2 respectively, are wink Between high pressure provide passage, protect MOS work safetys;Z18, Z12 are ESD electrostatic protection elements, absorb and are altered in machine system work Enter the instantaneous pressure energy in battery, protect electronic component safety in field-effect tube MOS and battery pack;
In battery pack charging process, battery core overvoltage, excess temperature or battery pack stagnation pressure are detected higher than setting voltage in protection chip When, CHR_CTR network signals are set to low level by battery pack control chip single chip control unit, and triode Q26 is by conducting shape State is switched to cut-off state, and the VGS voltages of MOS1, MOS1 are zero at this time, less than metal-oxide-semiconductor conducting voltage VTH, forces two metal-oxide-semiconductors Shut-off, stops charging, to ensure battery pack charging safety;It contains cell voltage detection unit:When battery pack is in charging, charging During situation, single chip control unit can detect battery pack voltage in real time, to protect battery pack to be operated in normal condition, specific works Principle is as follows:When single chip control unit is proportional to by detecting the value of the analog signal of R155, R156 partial pressure battery pack stagnation pressure Voltage bag total voltage, and obtained analog signal is passed through into analog-to-digital conversion, compared with the threshold value set by single chip control unit Compared with, and corresponding action is performed according to comparing, wherein C80 filters out the interference signal of the pressures of R156 two, so as to single chip control unit Accurate sampling battery voltage signal;If the magnitude of voltage that single chip control unit samples is higher than set charging voltage threshold value, Then illustrate overvoltage condition at battery pack, charge control CHR_CTR network signals can be set to low electricity by single chip control unit at this time It is flat, forcibly stop battery pack charging;If the magnitude of voltage that single chip control unit samples is less than set charging voltage Threshold value, then illustrate that battery is in under-voltage condition, single chip control unit communicatively can send out battery under-voltage signal at this time Discharge controller is given, stops battery pack electric discharge;When battery pack in a dormant state when, single chip control unit is by BAT_AD_ CTR network signals are set to low level, and Q25 metal-oxide-semiconductors are switched to cut-off state by conducting state, prevent battery pack by sampling electricity Resistance electric discharge, reduces kwh loss during battery pack idle condition;Its temperature detecting unit containing battery core:Battery pack is in charge or discharge During work, operating current is very big, and battery core temperature rises, and to make the battery core within the scope of suitable temperature work, is used in the design Temperature sensing circuit;Temperature detecting function be the analog signal based on the reaction cell temperature information inputted from battery pack come Monitor battery temperature, the analog signal sampled is converted to microcontroller by single chip control unit by internal analog to digital conversion circuit The digital signal that control unit can identify, specifically, magnitude of voltage and low temperature threshold and the height of comparative cell temperature detection signal Warm threshold value, also, battery temperature detection signal magnitude of voltage it is bigger than low temperature threshold or than high temperature threshold value it is small in the case of, judge Temperature for battery is abnormality;The thermal resistor used is thermistor of the temperature with resistance value relation for negative characteristic Device, temperature is higher, and the resistance value of temperature-sensitive is smaller, then the magnitude of voltage for the battery temperature signal that single chip control unit detects is got over It is small, therefore, when battery temperature signal magnitude of voltage is bigger than the low temperature threshold that single chip control unit is set, illustrate that battery temperature is low In the temperature value of setting, it is meant that battery temperature is low temperature, and battery temperature abnormal signal is set to high electricity by single chip control unit It is flat, on the contrary, when the value of battery temperature detection signal is smaller than high temperature threshold value, then mean that battery is in the condition of high temperature, monolithic Battery temperature abnormal signal is set to high level by machine control unit;Other single chip control units are receiving battery pack in system During the battery temperature exception information that single chip control unit is sent, battery pack charge or discharge control is set forcibly to stop;When Single chip control unit is by detecting R179, NTC1;The battery temperature analog signal that R156, NTC2 partial pressure obtain, and will obtain Analog signal pass through analog to digital conversion circuit, be converted to the digital signal that single chip control unit can identify, with microcontroller control Threshold value set by unit compares, when the temperature value detected higher than low temperature threshold or less than high temperature threshold value or when, all judge Temperature for battery is abnormality, and single chip control unit makes battery pack be stopped by control signal, wherein, C82, C94 filters out the interference signal at NTC1, NTC2 both ends respectively, so as to the accurate sampling battery temperature signal of single chip control unit;This Design employs two-way temperature monitoring circuit, and the operating temperature situation of each battery is detected according to the temperature difference of each battery core;It contains Battery status display unit:Be used as display device by four LED, by combinations of states, can correctly show battery voltage, Electricity, temperature and battery whether unusual condition etc., judge the working status residing for battery accordingly;Has lithium cells voltage not The gardens machine of balance detection process circuit, supplies lithium battery charging voltage multi resonant superimposed voltage rather than traditional constant pressure and flow DC charging, it is shaken by the rectified voltage and the Self-excitation Multi by being originally intended to spark-erosion machine tool of lithium battery charging circuit Multi resonant superimposed voltage caused by the multi resonant superimposed voltage element circuit mixed by the pulse voltage that device is drawn is swung such as multiple spot The hole of the storage electric charge of the inside by lithium battery of acupuncture formula is charged;The arteries and veins that the astatic multivibrator is drawn Voltage is rushed as 88 volts, pulse frequency is 88 kilo hertzs;Between the voltage of the rectification and the pulse voltage by the capacitance connected and The differential circuit that bypass resistance is formed is connected;The gardens machine of the tool lithium battery status display unit circuit, it contains battery Status display unit, is used as display device by four LED, by combinations of states, can correctly show voltage, the electricity of battery Amount, temperature and battery whether unusual condition etc., can judge the working status residing for battery accordingly;Has lithium cells voltage not The gardens machine of balance detection process circuit, is further characterized in that, its detection process circuit of Voltage unbalance containing lithium cells, has The uneven detection of battery cell voltage and Balance Treatment function;The unbalanced detection function of the design circuit single-unit battery core and intelligence Balancing technique, concrete operating principle is as follows:The battery assembly module of five string battery core composition of protection chip real time monitoring comes each The analog signal of battery core, detection port network name are respectively:BAT1, BAT2, BAT3, BAT4, BAT5, each port are connected in parallel on respectively The both ends of each single-unit battery core in battery pack, protection chip perform equilibrium function, it is necessary to meet the following conditions:Filled in battery pack Under electricity or holding state, threshold voltage of at least one economize on electricity core voltage higher than the startup battery core balance of voltage function that chip is set During VCB, at least one economize on electricity core voltage less than the threshold voltage VCB for starting battery core balance of voltage function, can not have battery core overcurrent, Event is protected in excess temperature, short circuit etc., and battery core is over-pressed, except single-unit battery core low-temperature protection, then starts balance of voltage function, protection The specific balance of voltage function of chip unit itself, but chip can be caused to generate heat in view of balanced balanced current, the design uses external electrical Road balancing technique, is controlled by protection location, is carried out the battery core balance of voltage by external circuit, is greatly improved balanced balanced current, The mesh of the balance of voltage is effectively achieved, while reduces the fever of protection location, makes the work that chip is more reliable;When protection chip BAT5 Port detectings are higher than VCB to CELL5, at this time shown in battery core balanced balanced current equation below:Ib=Vcell5/R16, formula; Ignore the saturation voltage drop Vce of triode Q1;In order to work normally balancing circuitry, the following conditions must are fulfilled for:Chip internal PMOS between BAT5 and BAT4 is opened, and CELL20 is switched by resistance R21, chip internal, the electric discharge of R22 formation Vcell5 is returned Road, at this time loop current expression formula be:Ib1=Vcell/ (R36+RDS+R37), formula 1, RDS are chip internal PMOS switch Equivalent resistance;
To ensure triode Q16 saturation conductions, then:VBE+IB*R56≤VR37, formula 2;
Wherein, VBE is much larger than IB*R56, and above formula is reduced to:VBE≤VR37, formula 3;
IB=Ib1/ β, formula 4;
VBE Wei tri- E pipe on state threshold voltages, β are the current amplification factor of triode Q16;
Then the voltage of R37 resistance is reduced to:VR37=(Ib1-IB) * R37, formula 5;
Calculated by formula 1- formula 5, the resistance value of optional suitable R37, the voltage for making balanced balanced current be formed at R37 both ends, The sum of voltage drop in VBE voltage drops and R56 more than Q16, ensure that Q1 is reliably turned on, reach the purpose for performing battery core balance; Protection chip can periodically detect battery core balance of voltage condition, and when meeting battery core balance of voltage condition, protection chip is in turn Balance where five go here and there battery units in odd number economize on electricity core and even number economize on electricity core voltage, i.e., one equilibration period inner equilibrium own Odd number section battery core, next cycle then balances the battery core of even number section, even if only a battery core needs to balance, next flat The weighing apparatus cycle will not perform equilibrium function;Battery core balance can be suspended during battery core voltage is detected;When in five string battery assembly modules When all battery core voltages are all higher than or below start the threshold voltage VCB of battery core balance of voltage function, stop balance of voltage work( Energy;A filter capacitor C24-C28 is placed between battery core voltage detecting port BAT1-BAT5 and ground network, with R21-R25 groups Into RC filter circuits, the high-frequency interferencing signal at BATn ends is filtered out, avoids battery core balancing circuitry from malfunctioning;The design is multiple protections The high-voltage battery component that chip cascade uses, battery core balanced design is multiple protection chip linkage works, to ensure whole electricity All battery core voltages of Chi Bao can balance;If the protection chip for being responsible for the string battery core of least significant end five detects battery and is in electric discharge During state, then stop all protection chip balance plays;If least significant end protection chip has detected overvoltage, excess temperature, short circuit etc. When protection event occurs, then suspend the balance play of all protection chips;If in the battery strings that certain grade of protection chip is responsible for When having the generation of under-voltage protection event, suspend the balance play in this battery pack, but not send a signal to other protection chips and stop Only balance play;In battery pack charging process, chip is such as protected to detect battery core overvoltage, excess temperature or battery pack stagnation pressure higher than setting During constant voltage, CHR_CTR network signals are set to low level by battery pack control chip single chip control unit, triode Q26 by Conducting state is switched to cut-off state, and the VGS voltages of MOS1, MOS1 are zero at this time, less than metal-oxide-semiconductor conducting voltage VTH, forces two Metal-oxide-semiconductor turns off, and stops charging, to ensure battery pack charging safety.
CN201710951460.6A 2017-09-28 2017-09-28 Has the gardens machine of lithium battery single chip control unit circuit CN107980328A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101252287A (en) * 2006-12-26 2008-08-27 美国凹凸微系有限公司 Power management circuit for battery pack
CN201886132U (en) * 2009-12-30 2011-06-29 深圳市福嘉太科技有限公司 Switch circuit for detecting voltage of battery
CN102222941A (en) * 2010-04-13 2011-10-19 登丰微电子股份有限公司 Balancing device for battery voltage and battery charging device
CN105932749A (en) * 2016-06-24 2016-09-07 浙江中马园林机器股份有限公司 Special lithium battery power supply device for garden tool
CN106026302A (en) * 2016-07-28 2016-10-12 张新安 Intelligent DC electric energy collection charger
CN106948706A (en) * 2017-04-12 2017-07-14 河南职业技术学院 Intelligent window opener
CN206362910U (en) * 2017-01-04 2017-07-28 深圳市丰农源科技有限公司 Battery core temperature sensing circuit based on unmanned plane

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101252287A (en) * 2006-12-26 2008-08-27 美国凹凸微系有限公司 Power management circuit for battery pack
CN201886132U (en) * 2009-12-30 2011-06-29 深圳市福嘉太科技有限公司 Switch circuit for detecting voltage of battery
CN102222941A (en) * 2010-04-13 2011-10-19 登丰微电子股份有限公司 Balancing device for battery voltage and battery charging device
CN105932749A (en) * 2016-06-24 2016-09-07 浙江中马园林机器股份有限公司 Special lithium battery power supply device for garden tool
CN106026302A (en) * 2016-07-28 2016-10-12 张新安 Intelligent DC electric energy collection charger
CN206362910U (en) * 2017-01-04 2017-07-28 深圳市丰农源科技有限公司 Battery core temperature sensing circuit based on unmanned plane
CN106948706A (en) * 2017-04-12 2017-07-14 河南职业技术学院 Intelligent window opener

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Application publication date: 20180504