CN107733019A - Gardens machine lithium cell charging program and battery status display circuit - Google Patents

Gardens machine lithium cell charging program and battery status display circuit Download PDF

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Publication number
CN107733019A
CN107733019A CN201710989349.6A CN201710989349A CN107733019A CN 107733019 A CN107733019 A CN 107733019A CN 201710989349 A CN201710989349 A CN 201710989349A CN 107733019 A CN107733019 A CN 107733019A
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CN
China
Prior art keywords
voltage
battery
temperature
circuit
chip
Prior art date
Application number
CN201710989349.6A
Other languages
Chinese (zh)
Inventor
苏克
叶晓波
Original Assignee
宁波大叶园林设备股份有限公司
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Priority to CN201710989349.6A priority Critical patent/CN107733019A/en
Publication of CN107733019A publication Critical patent/CN107733019A/en

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/006Control or measuring arrangements
    • 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
    • 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
    • H02J7/007Regulation of charging or discharging current or voltage
    • 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
    • H02J7/0077Regulation of charging or discharging current or voltage using semiconductor devices only the charge cycle being terminated in response to electric parameters
    • 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
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/24Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Abstract

Gardens machine is with lithium cell charging program and battery status display circuit, display circuit containing battery status, also containing charging procedure and control voltage detection function;The technique effect of detection function and intelligence is self-evident.Comprehensive composition effect of vibration and noise reduction has a serial gardens machine of improvement, a tractor serves several purposes, lifts the quality of exported product, world gardens machine of taking the lead in race.Its display unit containing battery status:Voltage, electricity, temperature, the battery of battery are shown by four LEDs, if unusual condition, it is very clear.Supply lithium cell charging voltage multi resonant superimposed voltage is charged such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula, and the differential circuit being made up of between commutating voltage and pulse voltage the electric capacity and bypass resistance connected mutually is arranged in pairs or groups.

Description

Gardens machine lithium cell charging program and battery status display circuit
Technical field
The present invention relates to a kind of electronic beat the grass to be 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, the expansion link of main frame middle and upper part mobile jib adjustable length is included, turns 180 Runing rest is spent, and circuit adds insurance, the dynamic foamed plastics of the additional vibration damping of motor, double acting switch positions the improvement slided, and Improve motors degree and gardens machine lithium cell charging program and battery status display circuit.
Background technology
Grass-mowing machine is widely used in mowing in the way of selected by the hobby of people.Some operation pedestrians like and practised 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, it 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, leave and easily cause 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 additional vibration damping of motor move foamed plastics and grass-mowing machine many places plus-minus shake deadener;And shake Dynamic and noise very big root power and instrument precision and form and position tolerance, to dual-purpose, to safety high-power charging use And survey dynamic balancing and precision modulding part, 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 scheme 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 expansion link assembly of middle and upper part mobile jib adjustable length, the runing rest assembly of turnback, motor assembly, base containing line 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 line box base axiality and survey dynamic The existing precision modulding part 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 described low vibration grass-mowing machine, it is the improvement hand that assembling successively is slided comprising double acting switch positioning from top to bottom Handle assembly, the expansion link 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 line box and is combined into grass-mowing machine;Its attachment component is brace 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 line box base axiality and the dynamically balanced existing precision modulding part of survey has laser to sight again The improved method of frock.
A kind of improvement of described 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), cable (7-1) is inscribed, 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:Described handle upper casing (3-1) and handle lower shell (3-2) is one left One right side is combined into handle, and it is all provided with wire-hanging hook (3-2a), and crosses line breach (3-2b), so that power line (1) is from described mistake Line breach, which folds, to be passed through, then is hung on described wire-hanging hook, in order to which line is not easy to pull;Described switch is housed on handle Trigger (4), switch trigger spring (5), terminal board (6), cable (7-1), inductance (7-2), self-tapping screw (8), line ball is inscribed Plate (9), switch (10), safe push button (11), safe push button spring (12), cable cover(ing) (2);Described switch trigger (4) and Described safe push button (11) is equipped with projecting block in place and collided, 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 described safe push button (11) is provided with place When moving without colliding, described switch trigger (4) can be just pressed, and described 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 described switch trigger (4) Switch trigger spring (5) make its return, then described safe push button spring (12) promotes described safe push button (11) to return Position;Described switch (10) also return, is DPDT 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, make grass-mowing machine motor not charged, also beneficial to what safety.Described 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 described low vibration grass-mowing machine, the expansion link 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), electric capacity (13-2), telescopic tube (13-3), spring electricity Cable (13-4), runing rest (13-5), pipe end positioning plug (13-6), tapping screw (13-7), rotary knob spring (14) Formed;It is characterized in that:The upper end of the described telescopic tube assembly (13) containing flexible button and snap-on is equipped with described pipe close (13-1), and be fixed on the handle attached together by described handle upper casing (3-1) and the first from left right side of handle lower shell (3-2) one;It is described Telescopic tube assembly (13) internal activity containing flexible button and snap-on described telescopic tube (13-3) is housed;Can in described Described electric capacity (13-2) and spring cable line (13-4) are placed with inside telescoping tube (13-3);In described telescopic tube (13-3) Bottom described runing rest (13-5) is housed, pipe end positioning plug (13-6), tapping screw (13-7) and rotary knob bullet Spring (14);The outside of the described telescopic tube assembly (13) containing flexible button and snap-on is provided with axial long recess, can to install The assist handle (16) and assist handle support (17) of position are allocated vertically;Described 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 be stretched with described containing The telescopic tube assembly of button and snap-on (13) matches;Push and set on the described telescopic tube assembly (13) containing flexible button and snap-on The flexible button and snap-on (13-3d) having, carry out optional gear with regard to that can pull out into the telescopic tube (13-3) described in extraction, be transferred to operation The grass-mowing machine working depth that person is liked.
A kind of improvement of described 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 bottom 180 degree by described runing rest (13-5), another be make it is auxiliary The assist handle bracket assembly of assistant's handle turnback.Described assist handle bracket assembly, by hex nut (15-1), knob (15-2), assist handle (16), assist handle support (17), hexagon-headed bolt (18) are formed;It is characterized in that:Described auxiliary Handle bracket (17) active card is mounted in the outside of the telescopic tube assembly (13) containing flexible button and snap-on, and with setting thereon The axial long recess having matches, and on described assist handle support (17), Fig. 2 and Figure 16 is refer to, equipped with hex nut (15-1), knob (15-2), assist handle (16), elastic knob (15-2), you can allocate assist handle (16) and auxiliary vertically Handle bracket (17) is helped to position smoothly.And described the rotation of grass-mowing machine bottom 180 degree is turned by runing rest (13-5) Turn bracket assembly, it is characterized in that:Be by described runing rest (13-5) come what is formed a connecting link, i.e., on hold telescoping tube, under open beat Careless machine lower casing, refer to Figure 12 and Figure 13;Described runing rest is housed in the bottom of described telescopic tube (13-3) (13-5), pipe end positioning plug (13-6), tapping screw (13-7) and rotary knob spring (14), and Fig. 3, Fig. 4 and Fig. 5; The described runing rest assembly containing turnback, in addition to protective cover (19), protection steel wire (20), compress piece (21), self tapping spiral shell Follow closely (22), foaming ring (23), and its motor chassis upper casing (30-1) of connection, motor chassis lower casing (30-2), rotation knob (31); Described runing rest (13-5) is provided with the macropore (13-5a) of Long Circle, is additionally provided with limited block (13-5b), is stretched to load The draw;Runing rest (13-5) is engaged in motor chassis, and with rotation knob (31);When pressing rotation knob (31), make The limited block (13-5b) of runing rest (13-5) moves down, then described telescopic tube (13-3) can be gone into 180 degree;Work as release When rotating knob (31), rotary knob spring (14) moves up runing rest (13-5) limited block (13-5b), then can still block and stretch The draw (13-3), because in telescoping tube (13-3) end, provided with square through hole, with limited block (13-5b), referring to Figure 14.
A kind of improvement of described low vibration grass-mowing machine, it contains motor assembly, by electric machine assembly (24), motor (24- 1), support pipe sleeve (24-2), line 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 line 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), Line box cover (25-7), the line bag cell-shell (25-8) with cell-shell labeling, blade (27), machine tooth screw (28), hex nut (29) Formed;A kind of improvement of described 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 described low vibration grass-mowing machine, it contains attachment component, by safety goggles (32), shoulder belt (33), standby 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), switch (K), inductance (L3), inductance (L4), electric capacity (C), and the series excited machine provided with winding (L1) and winding (L2) (M) formed;Inductance (L3) and inductance (L4) in described 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 described low vibration grass-mowing machine, its additional foamed material containing motor subtract vibration arrangement, are this hairs Bright major contribution, it 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 scheme shown in (20), install shock-absorbing and noise-eliminating material (30-3) additional.Described 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;Described 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 advantageous to further improved performance index, described 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, it is accurate to improve manufacture and assembling The method containing laser of degree, improves motor and line box base axiality and the dynamically balanced existing precision modulding part of survey have again it is sharp The improved method of the quasi- frock of illumination.First, the requirement to form and position tolerance is improved from layout design, such as to motor and line box The requirement of base axiality, motor and the line box base magnitude of interference are also increased, then pressed with reinforcing frock clamp;Moreover use number Control CNC machining centers prepare precision die, and plastic such as line box base is post-processed, and its main method is to use high-temperature vapour Method, preferably steam enough more than three hours, be unlikely to deform and lose shape in the hope of plastic part size;Secondly, it is same to improve motor and line box base Axle degree, during assembling, there is the frock press that laser sights using the calibration motor as shown in figure (22) and line box base axiality. Described has the frock that laser is sighted, and by press (41), laser sights head (42), motor locating piece (44), 2 middle cylinders (43), line 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 line box base (24-3) is collectively constituted;It is characterized in that:It is described Press (41) top, head (42) is sighted provided with laser, to sight electrical axis;The middle part of described press (41), if There is around each one motor locating piece (44), and be servo-actuated respectively by one of 2 middle cylinders (43);The downside of described press (41) Portion, the line box base locating piece (46) provided with left and right each one, and it is servo-actuated by small cylinder (45) and small cylinder (47) respectively, it is described Head (50), the position of the alignment line box base locating piece of both sides, provided with a left side are sighted in the leave from office portion of press (41), center provided with laser The laser on the right side each one sights head (48) and laser sights head (49);As an improvement, described locating piece (46) and locating piece (44) Or provided with pressure sensor, each laser sights head and the signal parameter of each locating piece and pressure sensor by CNC processing or difference Signal performs through nozzle flapper follower.Motor and line box base axiality it is calibrated and with this frock press after, and through batch Dynamic balancing amendment is surveyed in amount sampling can go up producing line, and last complete machine, which will also sample, surveys dynamic balancing, in the hope of being aided with many places shock-absorbing and noise-eliminating material Material, and integrating composition one kind has improved low vibration grass-mowing machine.Grass-mowing machine and brush cutter and hay mover are referred to as gardens machine.
A kind of improved another item important offer of the present invention to low vibration grass-mowing machine, it is for line changing in itself of beating the grass Enter.Sometimes when operator has found that projection 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, the reason for also one important 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 also referred to as special-shaped low-noise line, but because of its square or rhombus point The stupefied side of profit, cause going out to strangle on linear window and having ground narrow groove for runner sheath, so as to cause to occur the phenomenon that nylon wire blocks; 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.
Gardens machine lithium cell charging program and battery status display circuit, it contains charging procedure and process circuit, also contained Single chip control unit, by the way of reserve battery protection chip combines with single chip control unit, make circuit stability reliable, Ensure battery under various conditions can normal work, the single chip control unit is used as operation control center, responsible sampling It is various to ensure the analog signal of normal battery operation, and the data signal needed for control is converted to, error is small, and precision is high, chip Strong antijamming capability, simplify hardware circuit design and reduce the ineffectiveness high phenomenon of hardware circuit;It contains voltage transformation module: By battery bag 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 heating;Its circuit conversion principle:When Q33 triode ONs, the total positive voltage BAT+ of battery bag leads to Cross triode Q33, inductance L1, electric capacity EC2 and again return to the total negative terminal of battery, form charge circuit, BAT+ after inductance partial pressure, Charged to electric capacity EC2, to maintain load end VDD5V electric quantity consumption, while L1 is in energy storage state, during charging, EC2 capacitance voltages are gradually increasing, and when voltage rises to Z9 voltage-regulator diode breakdown voltages, Z9 conductings, are provided Vbe to Q36 and are led Be powered pressure, Q36 saturation conductions, so as to drag down triode Q35 base voltages, causes Q35 to be switched to cut-off state by conducting state, Before Q35 cut-offs, Q33 Vbe magnitudes of voltage are:
Vbe=VBAT+*R114/ (R114+R116)
This magnitude of voltage is more than Q33 on state threshold voltage, ensures Q33 conductings, after Q35 cut-offs, Q33 Vbe=0, Q33 are cut Only, battery always passes through inductance L1 and EC2 electric capacity is charged and terminated to the stage of VDD5V power supplies;When Q33 triodes turn off, From triode to inductance L1 charge circuit disconnect, the principle that can not be mutated according to L inductive currents, for maintain the sense of current 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 electric capacity 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 bag When electric stagnation pressure overvoltage, single-unit battery core, charging excessively stream, excess temperature or charger occur abnormal, single chip control unit is by controlling this Element circuit, charge tunnel is turned off, ensure charging safety;Under battery bag normal charging condition, single chip control unit output High level CHG_CTR signals by being added in Q26G poles after R162, R161 partial pressure, Q26 FET metal-oxide-semiconductor conducting, ignore D, S side pressures drop, and the electric current IQ flowed through from MOS1, MOS2 S ends by resistance R159, R160 is:
IQ=VPACK/ (R159+R160), then the voltage at resistance R159 both ends be:VR159=IQ*R159
This voltage is MOS G, S terminal voltage, 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 G, S end, and when exception, which occurs, in circuit causes G, S end too high, Z11 voltage-stabiliser tubes move Make, by G, S terminal voltage clamper in 16V safe operating voltage range, avoid pipe breakdown;Charge or put in battery bag When, instantaneous pressure caused by charger or motor work is superimposed upon MOS1, MOS2 D, S end, punctures MOS, causes battery bag work( It can fail, C98, C99 electric capacity are connected in parallel on MOS1, MOS2 D, S end 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 bag;
In battery bag charging process, battery core overvoltage, excess temperature or battery bag stagnation pressure are detected higher than setting in protection chip During voltage, CHR_CTR network signals are set to low level by battery bag control chip single chip control unit, and triode Q26 is by leading Logical state is switched to cut-off state, and now MOS1, MOS1 VGS voltages are zero, less than metal-oxide-semiconductor conducting voltage VTH, forces two Metal-oxide-semiconductor turns off, and stops charging, to ensure battery bag charging safety;It contains cell voltage detection unit:Filled when battery bag is in When electricity, charge condition, single chip control unit can detect battery bag voltage in real time, to protect battery bag 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 bag stagnation pressure Value is 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 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 single-chip microcomputer 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 bag, now single chip control unit can put charge control CHR_CTR network signals For low level, forcibly stop battery bag charging;If the magnitude of voltage that single chip control unit samples fills less than set Piezoelectric voltage threshold value, then illustrate that battery is in under-voltage condition, now single chip control unit can be communicatively by battery undervoltage Signal is sent to discharge controller, stops battery bag electric discharge;When battery bag in a dormant state when, single chip control unit will BAT_AD_CTR network signals are set to low level, and Q25MOS pipes switch to cut-off state by conducting state, prevent battery bag from passing through Sampling resistor discharges, and reduces kwh loss during battery bag idle condition;Its temperature detecting unit containing battery core:Battery bag 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 data 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 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, working as battery temperature The value of detection signal is spent than high temperature threshold value hour, then means that battery is in the condition of high temperature, and 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 bag in system Battery temperature abnormal information when, make battery bag charge or discharge control forcibly stop;When single chip control unit passes through Detect R179, NTC1;The battery temperature analog signal that R156, NTC2 partial pressure obtain, and obtained analog signal is passed through into modulus Change-over circuit, the data signal that single chip control unit can identify is converted to, with the threshold value phase set by single chip control unit Compare, 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 to be abnormal State, single chip control unit make battery bag be stopped by control signal, wherein, C82, C94 filter out NTC1, NTC2 respectively The interference signal at both ends, so as to the accurate sampling battery temperature signal of single chip control unit;The design employs two-way temperature prison Circuit is controlled, the operating temperature situation of each battery is detected according to the temperature difference of each battery core;Its display unit containing battery status:Pass through Four LEDs are as display device, by combinations of states, can correctly show battery voltage, electricity, temperature and battery whether Unusual condition etc., the working condition residing for battery is judged accordingly;
Gardens machine lithium cell charging program and battery status display circuit, supply lithium cell charging voltage are superimposed with multi resonant The DC charging of voltage rather than traditional constant pressure and flow, it is used by the rectified voltage of lithium battery charging circuit and by original Produced in the multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of spark-erosion machine tool is drawn Raw 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;Described The pulse voltage that astatic multivibrator is drawn is 88 volts, and pulse frequency is 88 kilo hertzs;The voltage of the rectification and the arteries and veins Rush between voltage and be connected by the electric capacity connected with the differential circuit that bypass resistance is formed;Gardens machine lithium cell charging program And control charging procedure circuit display unit containing battery status, it is used as display device by four LEDs, passes through combinations of states, energy Voltage, electricity, temperature and the battery of enough correct display batteries whether unusual condition etc., the work residing for battery can be judged accordingly State;Gardens machine lithium cell charging program and battery status display circuit, 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 chip battery pack list that the string of monitoring five battery core forms in real time The analog signal for each battery core that member comes, detection port network name are respectively:BAT1, BAT2, BAT3, BAT4, BAT5, each port The both ends for each single-unit battery core being connected in parallel on respectively in battery pack, protection chip perform equilibrium function, it is necessary to meet following condition: 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 function that chip is set Threshold voltage VCB when, at least one economize on electricity core voltage, can not less than the threshold voltage VCB for starting battery core balance of voltage function There is the protection event such as battery core excessively stream, excess temperature, short circuit, battery core is over-pressed, except single-unit battery core low-temperature protection, then starts voltage and put down Weigh function, 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, the design Using external circuit balancing technique, controlled by protection location, the battery core balance of voltage is carried out by external circuit, is greatly improved Balanced balanced current, effectively achieves the mesh of the balance of voltage, while reduces the heating of protection location, makes the work that chip is more reliable;When Protection chip BAT5 Port detectings are higher than VCB to CELL5, now shown in battery core balanced balanced current equation below:Ib=Vcell5/ R16, formula;Ignore triode Q1 saturation voltage drop Vce;
In order that balancing circuitry normal work, following condition must is fulfilled for:PMOS quilts between chip internal BAT5 and BAT4 Open, CELL20 is switched by resistance R21, chip internal, R22 formation Vcell5 discharge loop, and now loop current is expressed Formula is:
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 triode Q16 current amplification factor;
Then the voltage of R37 resistance is reduced to:VR37=(Ib1-IB) * R37, formula 5;
Calculated by formula 1- formula 5, suitable R37 resistance, the electricity for making balanced balanced current be formed at R37 both ends may be selected Pressure, the VBE voltage drops more than Q16 and the voltage drop sum on R56, ensure that Q1 is reliably turned on, reach the mesh for performing battery core balance 's;Protection chip can periodically detect battery core balance of voltage condition, when meeting battery core balance of voltage condition, protect chip wheel The five odd number economize on electricity core and even number economize on electricity core voltage gone here and there in battery units where mobile equilibrium, i.e., one equilibration period inner equilibrium institute The battery core of some odd number sections, next cycle then balance the battery core of even number section, even if only a battery core needs to balance, next Equilibration period is also not carried out equilibrium function;Battery core balance can be suspended during battery core voltage is detected;When five string battery assembly modules In all battery core voltages be all higher than or below start battery core balance of voltage function threshold voltage VCB when, stop the balance of voltage Function;Concrete operating principle is as follows:Under battery bag normal charging condition, the high level CHG_ of single chip control unit output CTR signals the conducting of Q26MOS pipes, ignore D, S side pressure drop, from MOS1, MOS2 by being added in Q26G poles after R162, R161 partial pressure The electric current IQ that S ends are flowed through by resistance R159, R160 is:IQ=VPACK/ (R159+R160), the then voltage at resistance R159 both ends For:VR159=IQ*R159, this voltage is MOS G, S terminal voltage, and magnitude of voltage is less than threshold voltage VGS, make MOS1, MOS2 is turned on, into charged state;Z11 voltage-stabiliser tubes are connected in parallel on PMOS G, S end, cause G, S end too high when exception occurs in circuit When, the action of Z11 voltage-stabiliser tubes, by G, S terminal voltage clamper in 16V safe operating voltage range, avoid pipe breakdown;In electricity When Chi Bao charges or put, instantaneous pressure caused by charger or motor work is superimposed upon MOS1, MOS2 D, S end, punctures MOS, Causing battery bag disabler, C98, C99 electric capacity are connected in parallel on MOS1, MOS2 D, S end, passage are provided for instantaneous pressure respectively, MOST is protected to make safety;Z18, Z12 are ESD electrostatic protection elements, and it is high to absorb the moment scurried into machine system work in battery Pressure energy amount, protect electronic component safety in MOS and battery bag;In battery bag charging process, such as chip is protected to detect battery core When overvoltage, excess temperature or battery bag stagnation pressure are higher than setting voltage, battery bag control chip single chip control unit is by CHR_CTR networks Signal is set to low level, and triode Q26 is switched to cut-off state by conducting state, and now MOS1, MOS1 VGS voltages are zero, Less than metal-oxide-semiconductor conducting voltage VTH, force two metal-oxide-semiconductors to turn off, stop charging, to ensure battery bag charging safety;Gardens machine lithium Battery charging procedure and battery status display circuit, when battery pack is in charging, discharged condition, single chip control unit can be real When detect battery voltage, battery is worked in the rational voltage range set, ensure whole system normal work, it is single Piece machine control unit is by detecting the analog signal of the battery pack stagnation pressure that R155, R156 partial pressure obtain, analog voltage: VBAT_AD=VBAT+*R156* (R155+R156), the magnitude of voltage of this analog signal are proportional to voltage bag total voltage, in circuit C80 filters out the high-frequency interferencing signal in R156 both end voltages, so as to the accurate sampling battery voltage signal of single chip control unit;For Reduce electric quantity consumption of the battery pack in dormancy situation, one is concatenated in divider resistance R155, R156 circuit and opens MOS Q25, BAT_AD_CTR network signals are set to high level by single-chip microcomputer during voltage detecting, carry out voltage detecting, now Q25G, S terminal voltage VGS is:VGS=R158/ (R157+R158) * 5;Single-chip microcomputer 5V powers;
To ensure that Q25 is reliably turned on, the resistance value of reasonable distribution R157, R158, is ensured in any case:
VGS (th) < VGS-VBAT_AD
When battery pack in a dormant state when, BAT_AD_CTR is low level, and Q25MOS pipes are switched to by conducting state and cut Only state, off voltage detection circuit, while prevent battery pack from being discharged by sampling resistor, reduces battery in idle condition Kwh loss;After single chip control unit receives analog signal, by the analog to digital conversion circuit inside single chip control unit Data signal is converted to, corresponding move is performed compared with the voltage threshold set by single chip control unit, and according to comparing To make, when the voltage signal that sampling obtains is higher than the threshold value set by single chip control unit, it is meant that battery voltage is too high, When the voltage signal that sampling obtains is lower than the threshold value set by single chip control unit, then mean that battery voltage is too low; For battery pack in charged state, single chip control unit detects that battery voltage is too high, and now single chip control unit can incite somebody to action Charge control CHR_CTR network signals are set to low level, and charge switch MOS1, MOS2 are off-state, while by over-pressed signal Charger is sent to, charger stops charge function;Double protection can it is enforceable stop charging, battery in discharge condition, Single chip control unit detects that cell voltage is too low, then under-voltage signal is sent into complete machine control system, complete machine control system Control shut-off battery discharge passage;
Gardens machine lithium cell charging program and battery status display circuit, its voltage transformation module containing 5V, the system work Power supply needed for work is by being depressured by cell voltage, there is provided appropriate voltage is to SCM system and other circuits, specific implementation It is depressured by way of pulse width demodulator PWM, then 5V voltage supplieds is carried by three terminal regulator, is powered to single-chip microcomputer, to carry High circuit conversion efficiency, cancel powerful dropping resistor, and reduce related elements heating;Circuit conversion principle:Q32 is as control The switch of PWM operating circuits processed, is turned on when system is in running order, is turned off during system dormancy, is reduced disappearing for the energy content of battery Consumption, single-chip microcomputer wakes up from resting state two ways:Netted by charger or electric machine control system by COM and send 5V high level Signal wakes up;Or by the system KEY button operations, it is depressured by battery voltage, there is provided single-chip microcomputer wake-up signal;When follow-up electricity Road work after, produce 5V voltages give monolithic power supply, monolithic processor controlled POWER_CTR signals are high level, by resistance R125, R205 is added in Q38 G, S end, Q38 conductings, and turns on Q32, when above-described one of which operational motion, 5V voltages MOS Q34 G, S end is added to by resistance R121, R122 partial pressure, magnitude of voltage is:VGS=R121/ (R121+R122) * 5V are reasonable R157, R158 resistance value are distributed, makes Q34 VGS > VGS (th), MOS conductings;The effect of C100 electric capacity filters out Q34 G, S ends High-frequency interferencing signal, avoids circuit erroneous action, Z19 voltage-regulator diodes, under any circumstance by Q34 G, S ends electric capacity is clamped is pacifying In full voltage range, after Q34 conductings, battery voltage BAT+ is formed by biasing resistor R123, R124, Q34 of Q32 triodes Loop, turn on triode Q32 in pressure drop caused by R123, now, BAT+ voltages are added to by current-limiting resistance R126, R127 The input of pwm circuit, BAT+ pass through biasing resistor R113, R115 triode Q35 B, E end, Q35 is in saturation conduction shape State so that BAT+ forms loop by triode Q35 biasing resistor R114, R116, and the pressure drop at resistance R114 both ends leads Q33 Logical, when Q33 triode ONs, the total positive voltage BAT+ of battery pack again returns to electricity by triode Q33, inductance L1, electric capacity EC2 The total negative terminals of Chi, charge circuit is formed, according to distracted secondary law, to be left positive right negative, BAT+ gives L1 both end voltages after inductance partial pressure Electric capacity EC2 charges, and the voltage on EC2 electric capacity exports high-precision 5V voltages, to single-chip microcomputer after the decompression of U6 three terminal regulators Operating voltage, while the electric current linear rise on L1 are provided, in energy storage stage, in stable state:Iinductor= (VBAT+-VEC2) * Ton/L, Iinductor:Inductor current value;VEC2:The output voltage of pwm circuit;Ton:Triode Q35 ON time,;Ton solution procedure is as follows:
According to magnetic field equilibrium principle:(VBAT+-VEC2) * Ton=(VEC2-V diode) * Toff;
Ton=(VEC2-V diode) * T/VBAT+;T:Pwm circuit cycle of oscillation;The voltage-stabiliser tube diode in parallel with EC2 Z8 plays stable EC2 voltages, and protection three terminal regulator U6 is operated in the range of safe voltage, in an abnormal situation EC2 electricity Hold voltage rise, when voltage is higher than 22V, more than Z8 voltage-regulator diode breakdown reverse voltages, electric current flows through diode, by voltage Stabilization is in 22V;In energy storage stage, EC2 capacitance voltages are gradually increasing, when voltage rises to Z9 voltage-regulator diode breakdown voltages Threshold value when, Z9 conducting, give Q36 provide Vbe conducting voltages, Q36 saturation conductions, so as to drag down triode Q35 base voltages, lead Q35 is caused to be switched to cut-off state by conducting state, before Q35 cut-offs, Q33 Vbe magnitudes of voltage are:Vbe=VBAT+*R114/ (R114+R116);
This magnitude of voltage is more than Q33 on state threshold voltage, ensures Q33 conductings, after Q35 cut-offs, Q33 Vbe=0, Q33 are cut Only, battery pack BAT+ voltages are charged to EC2 electric capacity by inductance L1 and terminated by U6 to the VDD5V stages powered;As Q33 tri- When pole pipe turns off, disconnected from triode to the charge circuit inductance L1, the principle that can not be mutated according to L inductive currents, for dimension Hold the sense of current and size is constant, for the direction transformation of the induced electromotive force of inductance to be right positive left negative, inductance is in what is released energy State, current channel are:Electric current flows to electric capacity EC2 from L1, is charged to EC2 electrochemical capacitors, for maintaining load end VDD5V to be disappeared The electricity of consumption, then pass through the negative terminal that sustained diode I0, D11 returns to inductance induced electromotive force, Iinductor=from GND ends excessively (VEC2-V diode)*Toff/L;
Iinductor:Inductor current value;V diode:D10, D11 forward conduction tube voltage drop;Toff:Triode Q35 ends Time;
R117, C84 form RC circuits, there is provided pwm circuit frequency of oscillation fsw:fsw=1/(R117*C 84)*109HZ.
Gardens machine lithium cell charging program and battery status display circuit, it is characterised in that it shows containing battery status Unit:
Its effect is to be used as display device by four LEDs, by combinations of states, can correctly show battery voltage, Electricity, temperature, battery, if having unusual condition, judge the working condition residing for battery, single-chip microcomputer according to the voltage sampled, Temperature information, after treatment, LED1, LED2, LED3, LED4 signal are exported, battery pack the present situation is shown, in circuit R190, R191, R192, R193 are current-limiting resistance, and protection LED will not be because of the excessive damage of electric current, if LED current value is ICURRENT, forward conduction voltage are VFORWARD, then:
ICURRENT=(5-VFORWARD)/R;Single-chip microcomputer 5V powers, and R is that each current-limiting resistance value reasonably configures current limliting electricity Resistance, make LED operation electric current in the range of several milliamperes;
Specific each status display is described as follows:
Electricity is shown:
1. under battery pack charging status, LED is shown:
As 60 < VBAT of battery voltage, LED1, LED2, LED3, LED4 with 1HZ frequency scintillations,
As 60 < VBAT <=72V of battery voltage, LED1-3 is with 1HZ frequency scintillations, LED4 Chang Liang,
As 72 < VBAT <=76V of battery voltage, LED1-2 is with 1HZ frequency scintillations, LED3, LED4 Chang Liang,
As 76 < VBAT <=80V of battery voltage, LED1 is with 1HZ frequency scintillations, LED2, LED3, LED4 Chang Liang,
As 83.2 < VBAT of battery voltage, LED1, LED2, LED3, LED4 Chang Liang,
2. under battery power discharge and holding state, LED is shown:
As 80 < VBAT of battery voltage, LED1, LED2, LED3, LED4 Chang Liang,
As 76 < VBAT <=80V of battery voltage, LED2, LED3, LED4 Chang Liang, LED1 go out,
As 72 < VBAT <=76V of battery voltage, LED3, LED4 Chang Liang, LED1, LED2 go out,
As 60 < VBAT <=72V of battery voltage, LED4 Chang Liang, LED1, LED2, LED3 go out,
As battery voltage VBAT < 60V, LED1, LED2, LED3, LED4 go out,
3. battery pack is in charging excess temperature or owes warm, LED is shown:
LED1, LED2, LED3, LED4 with 1HZ frequency scintillations,
4. battery pack is in electric discharge excess temperature or owes warm, LED is shown:
LED1, LED2, LED3, LED4 with 2HZ frequency scintillations,
By the setting of above LED dispaly states, user is clear from understanding battery pack conditions, carries out appropriate move in time Make, improve user's usage comfort;
Gardens machine lithium cell charging program and voltage conversion circuit, it contains charging procedure,
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 expansion link 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 line 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 standby nylon wire (34).
Fig. 9 is the schematic diagram of extended line (35).
Figure 10 is the schematic diagram of line bag cell-shell (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 telescopic tube (13-3) schematic diagram.
Figure 15 is the partial schematic diagram for installing power line (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 illustrated, in figure:
1. it is power line (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 breach (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 electric capacity (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 Long Circle;
13-5b is limited block (13-5b);
13-6. is pipe end positioning plug (13-6);
13-7. is tapping screw (13-7);
14. it is rotary knob 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 support (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 line 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 line box cover (25-7);
25-8. is the line bag cell-shell (25-8) with cell-shell 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 standby 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 electric capacity (C);
L1. it is winding (L1);
L2. it is winding (L2);
M. it is series excited machine (M);
Embodiment
Pedestrian is by liking and be accustomed to selecting grass-mowing machine for operation, wears safety goggles 32, is also enclosed on shoulder with shoulder belt 33 Upper and handle middle part, and careless condition route selection is pressed, or standby 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 telescopic tube 13-3 length, And power line 1 is passed through from described line breach 3-2b foldings of crossing, then hang over wire-hanging hook on described wire-hanging hook;Hold on the other hand auxiliary Assistant's handle 16, the other hand handle handle, and push safe push button 11 open and hold described switch trigger 4, just drive motor and beat Careless line, or with standby nylon wire 34, come operation of beating the grass.
It is explained in detail again below:
Because a kind of improvement of described low vibration grass-mowing machine, the improvement handle assembly of its positioning slip containing double acting switch, By power 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, 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 described 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 provided with wire-hanging hook 3- 2a, and cross line breach 3-2b, institute in order to power line 1 from it is described cross line breach and fold pass through, then the wire-hanging hook described in hanging over On, make line be not easy to pull.Described switch trigger 4 is installed on handle, switch trigger spring 5, terminal board 6, cable is inscribed 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 Described switch trigger 4 and described safe push button 11 are equipped with projecting block in place and collided, and refer to Figure 11, institute Only when promoting safe push button 11 and compressing secure push button spring 12, to make described safe push button 11 be provided with place Projecting block when moving forward without colliding, can just press described switch trigger 4, and described 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 described switch trigger 4, Described switch trigger spring 5 makes its return, and then described safe push button spring 12 promotes the described return of safe push button 11, Described switch 10 also return, is DPDT 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.Described cable cover(ing) 2 is soft pvc, Therefore also there is protective effect to described 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 A kind of improvement for the low vibration grass-mowing machine stated, it includes the expansion link 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, electric capacity 13-2, telescopic tube 13-3, spring cable line 13-4, runing rest 13-5, pipe end position plug 13-6, tapping screw 13-7, and rotary knob spring 14 is formed;Described contains flexible button and bullet The upper end of the telescopic tube assembly 13 of button is equipped with described pipe close 13-1, and is fixed on by under described handle upper casing 3-1 and handle On the handle that the first from left right sides of shell 3-2 mono- attach together;The described internal activity of telescopic tube assembly 13 containing flexible button and snap-on is equipped with institute The telescopic tube 13-3 stated;Described electric capacity 13-2 and spring cable line 13-4 are placed with inside described telescopic tube 13-3; Described runing rest 13-5, pipe end positioning plug 13-6, tapping screw 13- are housed in described telescopic tube 13-3 bottom 7 and rotary knob spring 14;The outside of the described telescopic tube assembly 13 containing flexible button and snap-on is provided with axial long recess, institute In order to install the assist handle 16 and assist handle support 17 that can allocate position vertically;Again because described telescopic tube 13-3, refer to Figure 14, which is provided with elongated slot 13-3b vertically, and multiple such as 12 gear 13-3c, institute in order to The described telescopic tube assembly 13 containing flexible button and snap-on matches.Push the described telescoping tube group containing flexible button and snap-on Flexible button and the snap-on 13-3d that part 13 is provided with, carry out optional gear with regard to that can pull out into the telescopic tube 13-3 described in extraction, be transferred to The grass-mowing machine working depth that operator is liked.
Because a kind of improvement of described 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 described runing rest 13-5 grass-mowing machine bottom 180 degree, another be make it is auxiliary The assist handle bracket assembly of assistant's handle turnback.Again because described assist handle bracket assembly, by hex nut 15-1, Knob 15-2, assist handle 16, assist handle support 17, hexagon-headed bolt 18 are formed;Described assist handle support 17 is lived The dynamic outside for being installed on the described telescopic tube assembly 13 containing flexible button and snap-on, and provided axial long recess phase Match somebody with somebody, and on described assist handle support 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 support 17 can be allocated, to position smoothly vertically. Because the runing rest assembly for turning grass-mowing machine bottom 180 degree by runing rest 13-5, it is by described 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 Telescopic tube 13-3 bottom is equipped with described runing rest 13-5, pipe end positioning plug 13-6, tapping screw 13-7 and rotation Button spring 14, and Fig. 3, Fig. 4 and Fig. 5;Again because of the runing rest assembly containing turnback, in addition to protective cover 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, rotate knob 31;Described runing rest 13-5 is provided with the macropore 13-5a of Long Circle, 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 runing rest 13-5 limited block 13-5b, then can be by described telescopic tube 13-3 goes to 180 degree;When unclamping rotation knob 31, rotary knob spring 14 moves up runing rest 13-5 limited block 13-5b, It then can still block telescoping tube 13-3.Because in telescoping tube 13-3 end, provided 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 described low vibration grass-mowing machine, it contains motor assembly, by electric machine assembly 24, motor 24- 1, pipe sleeve 24-2, line 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 described low vibration grass-mowing machine, the flake down of its base containing line 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, line box cover 25-7, the line bag cell-shell 25-8 with cell-shell labeling, blade 27, machine tooth screw 28, hex nut 29 are formed, its The middle line bag cell-shell 25-8 with cell-shell labeling is only used as packaging, and because a kind of improvement of described 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 described low vibration grass-mowing machine, it is containing attached Belong to component, be made up of safety goggles 32, shoulder belt 33, standby 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 not placed on blade by the used time On 27, there is protective action.
Because the 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, electric capacity C, and the series excited machine M provided with winding L1 and winding L2 is formed;Described Inductance L3 and inductance L4, equal Mining inductance 7-2 as shown in figure 18 in circuit diagram;Specially added with insurance RC, it is used the present invention Fuse, or with electrothermal relay, or with overcurrent protector, in the hope of safer.Why it is interior insured, also to add insuranceCause Many places are also supplied for power supply source, it insures often too greatly, does not fit into this grass-mowing machine.
Because a kind of improvement of described low vibration grass-mowing machine, its additional foamed material containing motor subtract vibration arrangement, are The major contribution of the present invention, it 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.Described 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;Described 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 to 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 advantageous to further improved performance index, described 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, there is improvement so composition one kind can be integrated and can reach effectiveness in vibration suppression, noise reduction, which has, to be changed The low vibration grass-mowing machine entered.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 line box base axiality 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 form and position tolerance, such as the requirement to motor and line box base axiality, also increase motor and line 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 line box bottom Seat is post-processed, and 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 line box base axiality, during assembling, using calibration motor and line box base as shown in figure 22 Axiality 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, line 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 common group of line box base 24-3 institutes Into;The top of described press 41, first 42 are sighted provided with laser, to sight electrical axis;The middle part of described press 41, if There is around each one motor locating piece 44, and be servo-actuated respectively by one of 2 middle cylinders 43;The following side of described press 41, if There is around each one line box base locating piece 46, and be servo-actuated respectively by small cylinder 45 and small cylinder 47, under described press 41 Platform portion, center sight first 50 provided with laser, and the position of the alignment line box base locating piece of both sides, the laser provided with left and right each one shines Accuracy 48 and laser sight first 49;As an improvement, described locating piece 46 and locating piece 44 or provided with pressure sensor, each laser Head and the signal parameter of each locating piece and pressure sensor is sighted to be held through nozzle flapper follower by CNC processing or differential signal OK.Motor and line box base axiality are calibrated and after being pressed with this frock, and through bulk sampling survey dynamic balancing amendment just can on Producing line, last complete machine, which will also sample, surveys dynamic balancing, therefore because being aided with many places shock-absorbing and noise-eliminating material, causes to integrate to constitute one kind and have and changes The low vibration grass-mowing machine entered.
A kind of improved another item important offer of the present invention to low vibration grass-mowing machine, it is for line changing in itself of beating the grass Enter.Sometimes when operator has found that projection 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, the reason for also one important 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 also referred to as special-shaped low-noise line, but because of its square or rhombus point The stupefied side of profit, cause going out to strangle on linear window and having ground narrow groove for runner sheath, so as to cause to occur the phenomenon that nylon wire blocks; 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 scheme be:A kind of more line of rabbet joint of grass-mowing machine abnormity, described special-shaped line are characterized in being provided with multiple asymmetry on its section Notch 34a, described notch are circumferentially not uniform into decile;Described notch is not square, but both sides are not parallel And indention, and bottom land 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 types and it is actually needed, nylon wire (25-4) and standby nylon wire (34) can be selected;Insure (RC) Majority uses fuse, also from electrothermal relay or overflowing device.
Gardens machine lithium cell charging program and voltage conversion circuit, it is characterised in that supply lithium cell charging voltage is not It is 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 electric spark Multi resonant caused by multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of lathe is drawn Superimposed voltage charges such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula.
Usefulness:Gardens machine lithium cell charging program and voltage conversion circuit, it contains process circuit and control unit And voltage transformation module and temperature monitoring circuit:Voltage is provided to linear regulator chip by way of pulse width modulation (PWM), Ensure voltage stabilizing chip safety;Supply lithium cell charging voltage is not the DC charging of traditional constant pressure and flow, but by lithium battery The pulse voltage institute that the rectified voltage and the astatic multivibrator by being originally intended to spark-erosion machine tool of charging circuit are drawn Multi resonant superimposed voltage caused by the multi resonant superimposed voltage element circuit of mixing is as multiple spot acupuncture formula is by lithium battery The hole of the storage electric charge in portion and charge, fast and safety and power is big.Comprehensive composition one kind, which can reach effectiveness in vibration suppression, improvement, drops Effect of making an uproar has an improved low vibration grass-mowing machine, evolutionary operation, lifts the quality and frock usability of product, and safe to use Property.The present invention relates to a kind of electric grass mowing equipment to be cut the grass on a lawn for the place such as beside flower bed, garden, park and road, especially It is a kind of improvement of low vibration grass-mowing machine, includes the expansion link of grass-mowing machine middle and upper part mobile jib adjustable length, turnback rotation branch Frame, and circuit add insurance, the dynamic foamed plastics of the additional vibration damping of motor, the improvement that double acting switch positioning is slided, and improve motor With line box base axiality and the charging grass-mowing machine of tool lithium battery multi resonant superimposed voltage composite portfolio element circuit.A kind of grass-mowing machine The more line of rabbet joint of abnormity, described special-shaped line are characterized in being provided with multiple asymmetric notches (34a) on its section have varied edge of a knife From to adapt to the mowing kind of different soft and hard;The charging of tool lithium battery multi resonant superimposed voltage composite portfolio element circuit is beaten the grass Machine, it contains single chip control unit:By the way of reserve battery protection chip combines with single chip control unit, make circuit steady It is fixed reliable, ensure battery under various conditions can normal work, the single chip control unit is used as operation control center, negative Duty sampling is various to ensure the analog signal of normal battery operation, and is converted to the data signal needed for control, and error is small, precision Height, chip strong antijamming capability, simplify hardware circuit design and reduce the ineffectiveness high phenomenon of hardware circuit.
Gardens machine lithium cell charging program and voltage conversion circuit, it contains single chip control unit:
The design enables the design circuit steady by the way of reserve battery protection chip combines with single chip control unit Fixed reliable work, ensure battery under various conditions can normal work, single chip control unit as operation control center, It is responsible for the analog signal of the various guarantee normal battery operations of sampling, and is converted to the data signal needed for 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.
Gardens machine lithium cell charging program and voltage conversion circuit, it contains voltage transformation module:
By battery bag 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 conversion efficiency, And reduce related elements heating.
Circuit conversion principle:
When Q33 triode ONs, the total positive voltage BAT+ of battery bag is returned again by triode Q33, inductance L1, electric capacity EC2 The total negative terminal of battery is returned to, forms charge circuit, BAT+ charges, to maintain load end after inductance partial pressure to electric capacity EC2 VDD5V electric quantity consumption, while L1 is in energy storage state, during charging, EC2 capacitance voltages are gradually increasing, and work as voltage When rising to Z9 voltage-regulator diode breakdown voltages, Z9 conductings, Vbe conducting voltages, Q36 saturation conductions, so as to drag down are provided to Q36 Triode Q35 base voltages, Q35 is caused to be switched to cut-off state by conducting state, before Q35 cut-offs, Q33 Vbe magnitudes of voltage are:
Vbe=VBAT+*R114/ (R114+R116)
This magnitude of voltage is more than Q33 on state threshold voltage, ensures Q33 conductings, after Q35 cut-offs, Q33 Vbe=0, Q33 are cut Only, battery always passes through inductance L1 and EC2 electric capacity is charged and terminated to the stage of VDD5V power supplies;
When Q33 triodes turn off, disconnected from triode to the charge circuit inductance L1, can not according to L inductive currents The principle of mutation, to maintain the sense of current 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 electric capacity EC2 from L1, is charged 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,
Gardens machine lithium cell charging program and voltage conversion circuit, it contains charging control unit:
Effect:There is the overvoltage of charging stagnation pressure, single-unit battery core, charging excessively stream, excess temperature or charger in battery bag 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 bag normal charging condition, single chip control unit output high level CHG_CTR signals by R162, Be added in Q26G poles after R161 partial pressures, the conducting of Q26MOS pipes, ignore D, S side pressure drop, from MOS1, MOS2 S ends by resistance R159, The electric current IQ that R160 flows through is:
IQ=VPACK/ (R159+R160)
Then the voltage at resistance R159 both ends is:
VR159=IQ*R159
This voltage is MOS G, S terminal voltage, 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 G, S end, and when exception, which occurs, in circuit causes G, S end too high, Z11 voltage-stabiliser tubes move Make, by G, S terminal voltage clamper in 16V safe operating voltage range, avoid pipe breakdown;
When battery bag charges or put, instantaneous pressure caused by charger or motor work is superimposed upon MOS1, MOS2 D, S End, puncture MOS, cause battery bag disabler, C98, C99 electric capacity are connected in parallel on MOS1, MOS2 D, S end respectively, are that moment is 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 bag;
In battery bag charging process, chip is such as protected to detect battery core overvoltage, excess temperature or battery bag stagnation pressure higher than setting During voltage, CHR_CTR network signals are set to low level by battery bag control chip single chip control unit, and triode Q26 is by leading Logical state is switched to cut-off state, and now MOS1, MOS1 VGS voltages are zero, less than metal-oxide-semiconductor conducting voltage VTH, forces two Metal-oxide-semiconductor turns off, and stops charging, to ensure battery bag charging safety;
Gardens machine lithium cell charging program and voltage conversion circuit, it contains cell voltage detection unit:
When battery bag is in charging, charge condition, single chip control unit can detect battery bag voltage in real time, with protection Battery bag 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 bag 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 monolithic The accurate sampling battery voltage signal of machine 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 bag Overvoltage condition, now single chip control unit charge control CHR_CTR network signals can be set to low level, forcibly stop Battery bag 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, now battery under-voltage signal communicatively can be sent to discharge controller by single chip control unit, Stop battery bag electric discharge.
When battery bag in a dormant state when, BAT_AD_CTR network signals are set to low level by single chip control unit, Q25MOS pipes switch to cut-off state by conducting state, prevent battery bag from being discharged by sampling resistor, reduce battery bag free time shape Kwh loss during state.
Gardens machine lithium cell charging program and voltage conversion circuit, its temperature detecting unit containing battery core:
For battery bag 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 data 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 bag is sent in system During normal information, battery bag 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 data 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 bag 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.
Gardens machine lithium cell charging program and voltage conversion circuit, its display unit containing battery status:
It is used as display device by four LEDs, by combinations of states, can correctly shows the voltage, electricity, temperature of battery Degree and battery whether unusual condition etc., the working condition residing for battery can be judged accordingly.
Gardens machine lithium cell charging program and voltage conversion circuit, supply lithium cell 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;Described 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.Gardens machine lithium cell charging program and voltage conversion circuit, it is special Sign is that it contains voltage transformation module:By battery bag voltage step-down by way of PWM, voltage is provided to linear regulator chip, Ensure that voltage stabilizing chip is operated in the range of safe voltage, cancel powerful dropping resistor, improve conversion efficiency, and reduce related Element heating, circuit conversion principle:When Q33 triode ONs, the total positive voltage BAT+ of battery bag passes through triode Q33, inductance L1, electric capacity EC2 again return to the total negative terminal of battery, form charge circuit, and BAT+ charges after inductance partial pressure to electric capacity EC2, with Load end VDD5V electric quantity consumption is maintained, while L1 is in energy storage state, during charging, on EC2 capacitance voltages are gradual Rise, when voltage rises to Z9 voltage-regulator diode breakdown voltages, Z9 conductings, provide Vbe conducting voltages to Q36, Q36 saturations are led It is logical, 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, Q33's Vbe magnitudes of voltage are:Vbe=VBAT+*R114/ (R114+R116), this magnitude of voltage are more than Q33 on state threshold voltage, ensure Q33 Conducting, after Q35 cut-offs, Q33 Vbe=0, Q33 cut-off, battery always pass through inductance L1 and EC2 electric capacity are charged 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 can not be mutated, to maintain the sense of current 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 electric capacity EC2 from L1, is charged 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.
Gardens machine lithium cell charging program and voltage conversion circuit, it contains single chip control unit and voltage transformation module And temperature monitoring circuit:Voltage is provided to linear regulator chip by way of pulse width modulation (PWM), ensures voltage stabilizing chip peace Entirely;Supply lithium cell charging voltage is not the DC charging of traditional constant pressure and flow, but by lithium battery charging circuit through whole Multi resonant superposition mixed by the pulse voltage that the voltage of stream and the astatic multivibrator as being originally intended to spark-erosion machine tool are drawn Multi resonant superimposed voltage caused by voltage cell circuit is such as the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula Hole and charge, fast and safety and power is big.It contains voltage transformation module, by battery by way of pulse width modulation (PWM) Bag voltage step-down, voltage is provided to linear regulator chip, ensures that voltage stabilizing chip 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 reduces related elements heating;Beneficial to effect Fruit 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 has improved low Vibrate dual-purpose type, evolutionary operation, lift the quality and frock usability of product, and safety in utilization.
Gardens machine lithium cell charging program and voltage conversion circuit, it supplies lithium cell 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 electric capacity connected with the differential circuit that bypass resistance is formed;Gardens machine with lithium cell charging program and Voltage conversion circuit contains charging control unit, and it is in the overvoltage of battery bag 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, ensured by controlling this element circuit Charging safety;Concrete operating principle is as follows:Under battery bag normal charging condition, the high level of single chip control unit output CHG_CTR signals the conducting of Q26MOS pipes, ignore D, S side pressure drop by being added in Q26G poles after R162, R161 partial pressure, from MOS1, The electric current IQ that MOS2 S ends 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 MOS G, S terminal voltage, 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 G, S end, cause G, S end when exception occurs in circuit When too high, the action of Z11 voltage-stabiliser tubes, by G, S terminal voltage clamper in 16V safe operating voltage range, avoid pipe breakdown; When battery bag charges or put, instantaneous pressure caused by charger or motor work is superimposed upon MOS1, MOS2 D, S end, breakdown MOS, cause battery bag disabler, C98, C99 electric capacity are connected in parallel on MOS1, MOS2 D, S end respectively, are provided for instantaneous pressure logical Road, protect MOS work safetys;Z18, Z12 are ESD electrostatic protection elements, absorb in machine system work and scurry into the wink in battery Between high-pressure energy, protect electronic component safety in MOS and battery bag;In battery bag charging process, such as chip is protected to detect When battery core overvoltage, excess temperature or battery bag stagnation pressure are higher than setting voltage, battery bag 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 now MOS1, MOS1 VGS voltages are Zero, less than metal-oxide-semiconductor conducting voltage VTH, force two metal-oxide-semiconductors to turn off, stop charging, to ensure battery bag charging safety.
Gardens machine lithium cell charging program and battery status display circuit, it supplies lithium cell charging voltage and folded with multi resonant The DC charging of making alive rather than traditional constant pressure and flow, it is by the rectified voltage of lithium battery charging circuit and by original Multi resonant superimposed voltage element circuit institute mixed by the pulse voltage that astatic multivibrator for 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;It is described The pulse voltage drawn of astatic multivibrator be 99 volts, pulse frequency is 99 kilo hertzs;The voltage of the rectification with it is described It is connected between pulse voltage by the electric capacity connected with the differential circuit that bypass resistance is formed;Gardens machine lithium cell charging journey Sequence and battery status display circuit, temperature detecting unit containing battery core:For battery bag when charge or discharge work, operating current is very Greatly, 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 Degree detection function is to monitor battery temperature, monolithic based on the analog signal of the reaction cell temperature information inputted from battery pack The analog signal sampled is converted to what single chip control unit can identify by machine control unit by internal analog to digital conversion circuit Data signal, magnitude of voltage and low temperature threshold and the high temperature threshold value of comparative cell temperature detection signal, also, detected in battery temperature In the case that the magnitude of voltage of signal is bigger than low temperature threshold or smaller than high temperature threshold value, the temperature for being judged as battery is abnormality;This The thermal resistor used in design is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is higher, temperature-sensitive Resistance value is smaller, then the magnitude of voltage for the battery temperature signal that single chip control unit detects is smaller, therefore, when battery temperature is believed When number magnitude of voltage 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 battery temperature, and battery temperature abnormal signal is set to high level by single chip control unit;On the contrary, work as battery temperature The value of detection signal then means that battery is in the condition of high temperature than high temperature threshold value hour, and single chip control unit is by battery temperature Abnormal signal is set to high level;Other single chip control units are sent in the single chip control unit for receiving battery bag in system During battery temperature abnormal information, battery bag charge or discharge control is set forcibly to stop;Concrete operating principle is as follows:Work as monolithic Machine control unit is by detecting R179, NTC1;The battery temperature analog signal that R156, NTC2 partial pressure obtain, and the mould that will be obtained Intend signal and pass through analog to digital conversion circuit, the data signal that single chip control unit can identify is converted to, with single chip control unit Set 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 electricity The temperature in pond is abnormality, and single chip control unit makes battery bag be stopped by control signal, wherein, C82, C94 points The interference signal at NTC1, NTC2 both ends is not filtered out, so as to the accurate sampling battery temperature signal of single chip control unit;Because of actual work The temperature of each battery core of battery can be variant in work, and the design employs two-way temperature monitoring circuit, as far as possible each electricity of actual monitored The operating temperature situation in pond, it is safe to use, get twice the result with half the effort.
Usefulness:
Gardens machine lithium cell charging program and battery status display circuit, its display unit containing battery status:Pass through four LEDs, by combinations of states, can correctly show whether voltage, electricity, temperature and the battery of battery are different as display device Normal situation, can have this and judge working condition residing for battery, it is very clear.Supply the multi resonant superimposed voltage of lithium cell charging voltage Charged such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula;The astatic multivibrator pulse For voltage to be secondary 88 volts, pulse frequency is 88 kilo hertzs;Between the voltage of the rectification and the pulse voltage by the electric capacity connected and The differential circuit that bypass resistance is formed is connected, beneficial to the high-power use of safety;Two-way temperature monitoring circuit is employed, is ensured steady Press chip secure;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 a serial gardens machine of improvement, a tractor serves several purposes, lifts the quality of exported product.
Gardens machine lithium cell charging program and battery status display circuit, it is characterised in that supply lithium cell charging electricity Pressure multi resonant superimposed voltage rather than the DC charging of traditional constant pressure and flow, it is by the rectified of lithium battery charging circuit The multi resonant superimposed voltage mixed by pulse voltage that voltage and the astatic multivibrator as being originally intended to spark-erosion machine tool are drawn Multi resonant superimposed voltage caused by element circuit is such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula And charge;The pulse voltage that described astatic multivibrator is drawn is 88 volts, and pulse frequency is 88 kilo hertzs;The rectification The differential circuit being made up of between voltage and the pulse voltage the electric capacity and bypass resistance connected is connected;The tool lithium electricity The gardens machine of pond status display unit circuit, its display unit containing battery status, it is used as display device by four LEDs, passes through Combinations of states, can correctly show battery voltage, electricity, temperature and battery whether unusual condition etc., battery can be judged accordingly Residing working condition;Gardens machine lithium cell charging program and battery status display circuit, are further characterized in that, it is containing lithium electricity Pool unit Voltage unbalance detection process circuit, there are 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:Protection chip monitors in real time 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 performs Equilibrium function, it is necessary to meet following condition:Under battery pack charging or holding state, at least one economize on electricity core voltage is higher than chip During the threshold voltage VCB of the startup battery core balance of voltage function of setting, at least one economize on electricity core voltage is less than startup battery core voltage The threshold voltage VCB of equilibrium function, can not there are the protection event such as battery core excessively stream, excess temperature, short circuit, battery core overvoltage, single-unit electricity Except core low-temperature protection, then start balance of voltage function, protect the specific balance of voltage function of chip unit itself, but in view of flat Weighing apparatus electric current can cause chip to generate heat, and the design uses external circuit balancing technique, is controlled by protection location, passes through external circuit The battery core balance of voltage is carried out, balanced balanced current is greatly improved, effectively achieves the mesh of the balance of voltage, while reduce protection location Heating, makes the work that chip is more reliable;When protection chip BAT5 Port detectings are higher than VCB to CELL5, now battery core balanced balanced current Shown in equation below:Ib=Vcell5/R16, formula;Ignore triode Q1 saturation voltage drop Vce;
In order that balancing circuitry normal work, following condition must is fulfilled for:PMOS quilts between chip internal BAT5 and BAT4 Open, CELL20 is switched by resistance R21, chip internal, R22 formation Vcell5 discharge loop, and now loop current is expressed Formula is:
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 triode Q16 current amplification factor;
Then the voltage of R37 resistance is reduced to:VR37=(Ib1-IB) * R37, formula 5;
Calculated by formula 1- formula 5, suitable R37 resistance, the electricity for making balanced balanced current be formed at R37 both ends may be selected Pressure, the VBE voltage drops more than Q16 and the voltage drop sum on R56, ensure that Q1 is reliably turned on, reach the mesh for performing battery core balance 's;Protection chip can periodically detect battery core balance of voltage condition, when meeting battery core balance of voltage condition, protect chip wheel The five odd number economize on electricity core and even number economize on electricity core voltage gone here and there in battery units where mobile equilibrium, i.e., one equilibration period inner equilibrium institute The battery core of some odd number sections, next cycle then balance the battery core of even number section, even if only a battery core needs to balance, next Equilibration period is also not carried out equilibrium function;Battery core balance can be suspended during battery core voltage is detected;When five string battery assembly modules In all battery core voltages be all higher than or below start battery core balance of voltage function threshold voltage VCB when, stop the balance of voltage 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 individual protection chip cascade uses, battery core balanced design is multiple protection chip linkage works, to ensure All battery core voltages of whole battery bag 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, When the protection event such as short circuit occurs, then suspend the balance play of all protection chips;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 bag 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 accurately adopted Sample battery temperature signal;Because the temperature of each battery core of battery in real work can be variant, the design employs two-way monitoring temperature Circuit, energy closing to reality monitor the operating temperature situation of each battery.
Usefulness:Gardens machine lithium battery of the gardens machine in lithium cell charging program and battery status display circuit Charging procedure, it is self-evident with reference to the detection function of battery core and the balancing technique of intelligence, effect with moving average filter method.Tool Its display unit containing battery status of the gardens machine of lithium cells Voltage unbalance detection process circuit, is used as by four LEDs Display device, by combinations of states can correctly show battery voltage, electricity, temperature and battery whether unusual condition, can evidence This judges the working condition residing for battery, very clear.Supply lithium cell charging voltage multi resonant superimposed voltage rather than tradition Constant pressure and flow DC charging, it is drawn by the rectified voltage of lithium battery charging circuit and by astatic multivibrator Multi resonant superimposed voltage is such as multiple spot acupuncture formula caused by multi resonant superimposed voltage element circuit mixed by the pulse voltage gone out Charged by the hole of the storage electric charge of the inside of lithium battery;Pulse voltage is 88 volts, and pulse frequency is 88 kilo hertzs;Rectified current Pressure is mutually arranged in pairs or groups with the differential circuit being made up of between pulse voltage the electric capacity and bypass resistance connected, is made beneficial to safety is high-power With;Two-way temperature monitoring circuit is employed, ensures voltage stabilizing chip safety;Improve safety in utilization, significant effect;Ensure voltage stabilizing core Piece safety;Charging is fast and safety and power is big;Gardens machine lithium cell charging program and battery status display circuit, it is containing lithium electricity Pool unit Voltage unbalance detection process circuit, there are 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, lift the quality of exported product, world gardens machine of taking the lead in race.
Gardens machine lithium cell charging program in gardens machine lithium cell charging program and battery status display circuit contains:
Usefulness:With lithium cell charging program and battery status display circuit, program containing lithium cell charging has gardens machine Detection function;The detection function of circuit single-unit battery core and the balancing technique of intelligence, effect are self-evident.It contains charging procedure and place Circuit is managed, also containing single chip control unit, by the way of reserve battery protection chip combines with single chip control unit, makes electricity Road is reliable and stable, ensure battery under various conditions can normal work, the single chip control unit is as in operation control The heart, is responsible for the analog signal of the various guarantee normal battery operations of sampling, and is converted to the data signal needed for control, and error is small, Precision is high, chip strong antijamming capability, simplifies hardware circuit design and reduces the ineffectiveness high phenomenon of hardware circuit;It is containing electricity Press converter unit:By battery bag voltage step-down by way of pulse width modulation (PWM), voltage is provided to linear regulator chip, Ensure that voltage stabilizing chip is operated in the range of safe voltage, electric circuit characteristic:PWM is depressured, and reduces power, cancels powerful decompression electricity Resistance, conversion efficiency is improved, and reduce related elements heating.Supply lithium cell charging voltage multi resonant superimposed voltage rather than tradition Constant pressure and flow DC charging, it is by the rectified voltage of lithium battery charging circuit and by being originally intended to spark-erosion machine tool Multi resonant superposition electricity caused by multi resonant superimposed voltage element circuit mixed by the pulse voltage that astatic multivibrator is drawn Pressure charges such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula;Described astatic multivibrator The pulse voltage drawn is 88 volts or so, and pulse frequency is 88 kilo hertzs or so;The voltage of the rectification and the pulse voltage Between be connected by the electric capacity connected with the differential circuit that bypass resistance is formed;Battery bag is when charge or discharge work, work It is very big to make electric current, battery core temperature rises, and to make the battery core within the scope of suitable temperature work, employs temperature sensing circuit;Temperature Degree detection function is to monitor battery temperature, monolithic based on the analog signal of the reaction cell temperature information inputted from battery pack The analog signal sampled is converted to what single chip control unit can identify by machine control unit by internal analog to digital conversion circuit Data signal, magnitude of voltage and low temperature threshold and the high temperature threshold value of comparative cell temperature detection signal, also, detected in battery temperature In the case that the magnitude of voltage of signal is bigger than low temperature threshold or smaller than high temperature threshold value, the temperature for being judged as battery is abnormality;This The thermal resistor used in design is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is higher, temperature-sensitive Resistance value is smaller, then the magnitude of voltage for the battery temperature signal that single chip control unit detects is smaller, therefore, when battery temperature is believed When number magnitude of voltage 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 battery temperature, and battery temperature abnormal signal is set to high level by single chip control unit.Gardens machine is filled with lithium battery Electric program and battery voltage detection unit, program containing lithium cell charging and control pwm pulse function;Detection function and intelligence Balancing technique effect is self-evident.
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, leads Run world gardens machine.Its display unit containing battery status:Voltage, electricity, temperature and the battery of battery are shown by four LEDs Whether unusual condition, it is very clear.Supply lithium cell charging voltage multi resonant superimposed voltage passes through lithium such as multiple spot acupuncture formula The hole of the storage electric charge of the inside of battery and charge, electric capacity and bypass resistance between commutating voltage and pulse voltage by connecting The differential circuit formed is mutually arranged in pairs or groups.A filtered electrical is placed between battery core voltage detecting port BAT1-BAT5 and ground network Hold C24-C28, form RC filter circuits with R21-R25, filter out the high-frequency interferencing signal at BATn ends, avoid battery core balancing circuitry from missing Action;The high-voltage battery component that the design uses for multiple protection chip cascades, battery core balanced design is multiple protection chips Linkage work, to ensure that all battery core voltages of whole battery bag can balance;If it is responsible for the protection of the string battery core of least significant end five When chip detects battery and is in discharge condition, then stop all protection chip balance plays;If least significant end protection chip is detectd When having measured the generation of the protection such as overvoltage, excess temperature, short circuit event, then suspend the balance plays of all protection chips;If certain level is protected When having the generation of under-voltage protection event in the battery strings that shield chip is responsible for, suspend the balance play in this battery pack, but not send out The number of delivering letters stops balance play to other protection chips;Containing charging control unit, effect is that charging occur in battery bag always to press through When pressure, single-unit battery core, charging excessively stream, excess temperature or charger occur abnormal, single chip control unit by controlling this element circuit, Charge tunnel is turned off, ensures charging safety;Its temperature detecting unit containing battery core:Battery bag is when charge or discharge work, work Electric current is very big, and battery core temperature rises, and to make the battery core within the scope of suitable temperature work, employs temperature sensing circuit;Temperature Detection function is to monitor battery temperature, single-chip microcomputer based on the analog signal of the reaction cell temperature information inputted from battery pack The analog signal sampled is converted to the number that single chip control unit can identify by control unit by internal analog to digital conversion circuit Word signal, magnitude of voltage and low temperature threshold and the high temperature threshold value of comparative cell temperature detection signal, also, detect and believe in battery temperature Number 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;Originally set The thermal resistor used in meter is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is higher, the electricity of temperature-sensitive Resistance 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 signal When magnitude of voltage 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 Battery 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 is examined The value of signal is surveyed than high temperature threshold value hour, then means that battery is in the condition of high temperature, single chip control unit is different by battery temperature Regular signal is set to high level;The electricity that other single chip control units are sent in the single chip control unit for receiving battery bag in system Stop battery during the temperature anomaly information of pond;
Gardens machine lithium cell charging program and battery voltage detection unit, it is characterised in that act on it and work as battery pack During in charging, discharged condition, single chip control unit can detect battery voltage in real time, make battery rational what is set Worked in voltage range, ensure whole system normal work, what single chip control unit was obtained by detecting R155, R156 partial pressure The analog signal of battery pack stagnation pressure, analog voltage are:VBAT_AD=VBAT+*R156* (R155+R156), this analog signal Magnitude of voltage be proportional to voltage bag total voltage, C80 filters out the high-frequency interferencing signal in R156 both end voltages in circuit, so as to monolithic The accurate sampling battery voltage signal of machine control unit;To reduce electric quantity consumption of the battery pack in dormancy situation, in divider resistance Concatenation one opens MOS Q25 in R155, R156 circuit, and in voltage detecting, BAT_AD_CTR network signals are set to high electricity by single-chip microcomputer It is flat, voltage detecting is carried out, now Q25G, S terminal voltage VGS are:VGS=R158/ (R157+R158) * 5;Single-chip microcomputer 5V powers;
To ensure that Q25 is reliably turned on, the resistance value of reasonable distribution R157, R158, is ensured in any case:
VGS (th) < VGS-VBAT_AD
When battery pack in a dormant state when, BAT_AD_CTR is low level, and Q25MOS pipes are switched to by conducting state and cut Only state, off voltage detection circuit, while prevent battery pack from being discharged by sampling resistor, reduces battery in idle condition Kwh loss;After single chip control unit receives analog signal, by the analog to digital conversion circuit inside single chip control unit Data signal is converted to, corresponding move is performed compared with the voltage threshold set by single chip control unit, and according to comparing To make, when the voltage signal that sampling obtains is higher than the threshold value set by single chip control unit, it is meant that battery voltage is too high, When the voltage signal that sampling obtains is lower than the threshold value set by single chip control unit, then mean that battery voltage is too low; For battery pack in charged state, single chip control unit detects that battery voltage is too high, and now single chip control unit can incite somebody to action Charge control CHR_CTR network signals are set to low level, and charge switch MOS1, MOS2 are off-state, while by over-pressed signal Charger is sent to, charger stops charge function;Double protection enforceable can stop charging, battery in discharge condition, Single chip control unit detects that cell voltage is too low, then under-voltage signal is sent into complete machine control system, complete machine control system Control shut-off battery discharge passage.
Bright spot of the present invention is:
Gardens machine lithium cell charging program and battery status display circuit, its voltage transformation module containing 5V, the system work Power supply needed for work is by being depressured by cell voltage, there is provided appropriate voltage is to SCM system and other circuits, specific implementation It is depressured by way of pulse width demodulator PWM, then 5V voltage supplieds is carried by three terminal regulator, is powered to single-chip microcomputer, to carry High circuit conversion efficiency, cancel powerful dropping resistor, and reduce related elements heating;Circuit conversion principle:Q32 is as control The switch of PWM operating circuits processed, is turned on when system is in running order, is turned off during system dormancy, is reduced disappearing for the energy content of battery Consumption, single-chip microcomputer wakes up from resting state two ways:Netted by charger or electric machine control system by COM and send 5V high level Signal wakes up;Or by the system KEY button operations, it is depressured by battery voltage, there is provided single-chip microcomputer wake-up signal;When follow-up electricity Road work after, produce 5V voltages give monolithic power supply, monolithic processor controlled POWER_CTR signals are high level, by resistance R125, R205 is added in Q38 G, S end, Q38 conductings, and turns on Q32, when above-described one of which operational motion, 5V voltages MOS Q34 G, S end is added to by resistance R121, R122 partial pressure, magnitude of voltage is:VGS=R121/ (R121+R122) * 5V are reasonable R157, R158 resistance value are distributed, makes Q34 VGS > VGS (th), MOS conductings;The effect of C100 electric capacity filters out Q34G, S end High-frequency interferencing signal, avoids circuit erroneous action, Z19 voltage-regulator diodes, is pacifying under any circumstance by Q34G, S end electric capacity are clamped In full voltage range, after Q34 conductings, battery voltage BAT+ is formed by biasing resistor R123, R124, Q34 of Q32 triodes Loop, turn on triode Q32 in pressure drop caused by R123, now, BAT+ voltages are added to by current-limiting resistance R126, R127 The input of pwm circuit, BAT+ pass through biasing resistor R113, R115 triode Q35 B, E end, Q35 is in saturation conduction shape State so that BAT+ forms loop by triode Q35 biasing resistor R114, R116, and the pressure drop at resistance R114 both ends leads Q33 Logical, when Q33 triode ONs, the total positive voltage BAT+ of battery pack again returns to electricity by triode Q33, inductance L1, electric capacity EC2 The total negative terminals of Chi, charge circuit is formed, according to distracted secondary law, to be left positive right negative, BAT+ gives L1 both end voltages after inductance partial pressure Electric capacity EC2 charges, and the voltage on EC2 electric capacity exports high-precision 5V voltages, to single-chip microcomputer after the decompression of U6 three terminal regulators Operating voltage, while the electric current linear rise on L1 are provided, in energy storage stage, in stable state:Iinductor= (VBAT+-VEC2) * Ton/L, Iinductor:Inductor current value;VEC2:The output voltage of pwm circuit;Ton:Triode Q35 ON time,;Ton solution procedure is as follows:
According to magnetic field equilibrium principle:(VBAT+-VEC2) * Ton=(VEC2-V diode) * Toff;
Ton=(VEC2-V diode) * T/VBAT+;T:Pwm circuit cycle of oscillation;The voltage-stabiliser tube diode in parallel with EC2 Z8 plays stable EC2 voltages, and protection three terminal regulator U6 is operated in the range of safe voltage, in an abnormal situation EC2 electricity Hold voltage rise, when voltage is higher than 22V, more than Z8 voltage-regulator diode breakdown reverse voltages, electric current flows through diode, by voltage Stabilization is in 22V;In energy storage stage, EC2 capacitance voltages are gradually increasing, when voltage rises to Z9 voltage-regulator diode breakdown voltages Threshold value when, Z9 conducting, give Q36 provide Vbe conducting voltages, Q36 saturation conductions, so as to drag down triode Q35 base voltages, lead Q35 is caused to be switched to cut-off state by conducting state, before Q35 cut-offs, Q33 Vbe magnitudes of voltage are:Vbe=VBAT+*R114/ (R114+R116);
This magnitude of voltage is more than Q33 on state threshold voltage, ensures Q33 conductings, after Q35 cut-offs, Q33 Vbe=0, Q33 are cut Only, battery pack BAT+ voltages are charged to EC2 electric capacity by inductance L1 and terminated by U6 to the VDD5V stages powered;As Q33 tri- When pole pipe turns off, disconnected from triode to the charge circuit inductance L1, the principle that can not be mutated according to L inductive currents, for dimension Hold the sense of current and size is constant, for the direction transformation of the induced electromotive force of inductance to be right positive left negative, inductance is in what is released energy State, current channel are:Electric current flows to electric capacity EC2 from L1, is charged to EC2 electrochemical capacitors, for maintaining load end VDD5V to be disappeared The electricity of consumption, then pass through sustained diode 10, the negative terminal of D11 return inductance induced electromotive forces, Iinductor=from GND ends are crossed (VEC2-V diode)*Toff/L;
Iinductor:Inductor current value;V diode:D10, D11 forward conduction tube voltage drop;Toff:Triode Q35 ends Time;
R117, C84 form RC circuits, there is provided pwm circuit frequency of oscillation fsw:Fsw=1/ (R117*C 84) * 109HZ.
Gardens machine lithium cell charging program and voltage conversion circuit, it is characterised in that its display unit containing battery status:
Its effect is to be used as display device by four LEDs, by combinations of states, can correctly show battery voltage, Electricity, temperature, battery, if having unusual condition, judge the working condition residing for battery, single-chip microcomputer according to the voltage sampled, Temperature information, after treatment, LED1, LED2, LED3, LED4 signal are exported, battery pack the present situation is shown, in circuit R190, R191, R192, R193 are current-limiting resistance, and protection LED will not be because of the excessive damage of electric current, if LED current value is ICURRENT, forward conduction voltage are VFORWARD, then:
ICURRENT=(5-VFORWARD)/R;Single-chip microcomputer 5V powers, and R is that each current-limiting resistance value reasonably configures current limliting electricity Resistance, make LED operation electric current in the range of several milliamperes;
Specific each status display is described as follows:
Electricity is shown:
1. under battery pack charging status, LED is shown:
As 60 < VBAT of battery voltage, LED1, LED2, LED3, LED4 with 1HZ frequency scintillations,
As 60 < VBAT <=72V of battery voltage, LED 1-3 are with 1HZ frequency scintillations, LED4 Chang Liang,
As 72 < VBAT <=76V of battery voltage, LED1-2 is with 1HZ frequency scintillations, LED3, LED4 Chang Liang,
As 76 < VBAT <=80V of battery voltage, LED1 is with 1HZ frequency scintillations, LED2, LED3, LED4 Chang Liang,
As 83.2 < VBAT of battery voltage, LED1, LED2, LED3, LED4 Chang Liang,
2. under battery power discharge and holding state, LED is shown:
As 80 < VBAT of battery voltage, LED1, LED2, LED3, LED4 Chang Liang,
As 76 < VBAT <=80V of battery voltage, LED2, LED3, LED4 Chang Liang, LED1 go out,
As 72 < VBAT <=76V of battery voltage, LED3, LED4 Chang Liang, LED1, LED2 go out,
As 60 < VBAT <=72V of battery voltage, LED4 Chang Liang, LED1, LED2, LED3 go out,
As battery voltage VBAT < 60V, LED1, LED2, LED3, LED4 go out,
3. battery pack is in charging excess temperature or owes warm, LED is shown:
LED1, LED2, LED3, LED4 with 1HZ frequency scintillations,
4. battery pack is in electric discharge excess temperature or owes warm, LED is shown:
LED1, LED2, LED3, LED4 with 2HZ frequency scintillations,
By the setting of above LED dispaly states, user is clear from understanding battery pack conditions, carries out appropriate move in time Make, improve user's usage comfort.

Claims (4)

1. gardens machine lithium cell charging program and battery status display circuit, it contains charging procedure and process circuit, also containing single Piece machine control unit, by the way of reserve battery protection chip combines with single chip control unit, make circuit stability reliable, protect Demonstrate,prove battery under various conditions can normal work, the single chip control unit be used as operation control center, be responsible for sampling respectively Kind ensures the analog signal of normal battery operation, and is converted to the data signal needed for control, and error is small, and precision is high, and chip resists Interference performance is strong, simplifies hardware circuit design and reduces the ineffectiveness high phenomenon of hardware circuit;It contains voltage transformation module:It is logical Battery bag voltage step-down is given linear regulator chip to provide voltage by extra pulse width modulated PWM mode, ensures voltage stabilizing chip work Make in the range of safe voltage, electric circuit characteristic:PWM is depressured, and reduces power, cancels powerful dropping resistor, improves conversion effect Rate, and reduce related elements heating;Its circuit conversion principle:When Q33 triode ONs, the total positive voltage BAT+ of battery bag passes through Triode Q33, inductance L1, electric capacity EC2 again return to the total negative terminal of battery, form charge circuit, and BAT+ gives after inductance partial pressure Electric capacity EC2 charges, and to maintain load end VDD5V electric quantity consumption, while L1 is in energy storage state, during charging, EC2 Capacitance voltage is gradually increasing, and when voltage rises to Z9 voltage-regulator diode breakdown voltages, Z9 conductings, Vbe electric conductions is provided to Q36 Pressure, Q36 saturation conductions, so as to drag down triode Q35 base voltages, causes Q35 to be switched to cut-off state, Q35 by conducting state Before cut-off, Q33 Vbe magnitudes of voltage are:
Vbe=VBAT+*R114/ (R114+R116)
This magnitude of voltage is more than Q33 on state threshold voltage, ensures Q33 conductings, after Q35 cut-offs, Q33 Vbe=0, Q33 cut-off, Battery always passes through inductance L1 and EC2 electric capacity is charged and terminated to the stage of VDD5V power supplies;When Q33 triodes turn off, from three Pole pipe disconnects to the charge circuit between inductance L1, the principle that can not be mutated according to L inductive currents, to maintain the sense of current 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 electric capacity EC2 from L1, is charged 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 bag Press through, when single-unit battery core, charging excessively stream, excess temperature or charger occur abnormal, single chip control unit is by controlling this element Circuit, charge tunnel is turned off, ensure charging safety;Under battery bag normal charging condition, the height of single chip control unit output Level CHG_CTR signals Q26 FET MOA pipes conducting, ignore D, S by being added in Q26 G poles after R162, R161 partial pressure Side pressure drops, and the electric current IQ flowed through from MOS1, MOS2 S ends by resistance R159, R160 is:
IQ=VPACK/ (R159+R160), then the voltage at resistance R159 both ends be:VR159=IQ*R159
This voltage is MOS G, S terminal voltage, and magnitude of voltage is less than threshold voltage VGS, turns on MOS1, MOS2, into charging State;Z11 voltage-stabiliser tubes are connected in parallel on PMOS G, S end, when, which there is exception, in circuit causes G, S end too high, the action of Z11 voltage-stabiliser tubes, By G, S terminal voltage clamper in 16V safe operating voltage range, avoid pipe breakdown;When battery bag charges or put, fill Instantaneous pressure caused by electrical equipment or motor work is superimposed upon MOS1, MOS2 D, S end, punctures MOS, causes battery packet function to lose Effect, C98, C99 electric capacity are connected in parallel on MOS1, MOS2 D, S end respectively, provide passage for instantaneous pressure, protect MOS work safetys; Z18, Z12 are ESD electrostatic protection elements, absorb and the instantaneous pressure energy in battery is scurried into machine system work, protection field effect Should electronic component safety in pipe MOS and battery bag;
In battery bag charging process, battery core overvoltage, excess temperature or battery bag stagnation pressure are detected higher than setting voltage in protection chip When, CHR_CTR network signals are set to low level by battery bag control chip single chip control unit, and triode Q26 is by conducting shape State is switched to cut-off state, and now MOS1, MOS1 VGS voltages are zero, less than metal-oxide-semiconductor conducting voltage VTH, forces two metal-oxide-semiconductors Shut-off, stop charging, to ensure battery bag charging safety;It contains cell voltage detection unit:When battery bag is in charging, charging During situation, single chip control unit can detect battery bag voltage in real time, to protect battery bag 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 bag 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 bag, now charge control CHR_CTR network signals can be set to low electricity by single chip control unit It is flat, forcibly stop battery bag 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, now single chip control unit communicatively can send out battery under-voltage signal Discharge controller is given, stops battery bag electric discharge;When battery bag 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 switch to cut-off state by conducting state, prevent battery bag by sampling electricity Resistance electric discharge, reduces kwh loss during battery bag idle condition;Its temperature detecting unit containing battery core:Battery bag 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 Battery temperature is monitored, the analog signal sampled is converted to single-chip microcomputer by single chip control unit by internal analog to digital conversion circuit The data 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, the magnitude of voltage of battery temperature detection signal 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 bag in system During the battery temperature abnormal information that single chip control unit is sent, battery bag 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 data signal that single chip control unit can identify, with single-chip microcomputer 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 bag 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 LEDs, by combinations of states, can correctly show battery voltage, Electricity, temperature and battery whether unusual condition etc., judge the working condition residing for battery accordingly;
Gardens machine lithium cell charging program and battery status display circuit, supply lithium cell charging voltage multi resonant superimposed voltage Rather than the DC charging of traditional constant pressure and flow, it is by the rectified voltage of lithium battery charging circuit and by being originally intended to electricity Caused by multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of spark lathe is drawn 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;Described self-excitation The pulse voltage that multivibrator is drawn is 88 volts, and pulse frequency is 88 kilo hertzs;The voltage of the rectification and pulse electricity It is connected between pressure by the electric capacity connected with the differential circuit that bypass resistance is formed;The tool lithium battery status display unit electricity The gardens machine on road, its display unit containing battery status, it is used as display device by four LEDs, can be correct by combinations of states Show battery voltage, electricity, temperature and battery whether unusual condition etc., the working condition residing for battery can be judged accordingly;Garden Woods machine lithium cell charging program and battery status display circuit, its detection process circuit of Voltage unbalance containing lithium cells, There are 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 The balancing technique of energy, concrete operating principle are as follows:The protection chip battery assembly module that the string of monitoring five battery core forms in real time comes The analog signal of each battery core, detection port network name are respectively:BAT1, BAT2, BAT3, BAT4, BAT5, each port are in parallel respectively The both ends of each single-unit battery core in battery pack, protection chip perform equilibrium function, it is necessary to meet following condition:In battery pack Under charging or holding state, threshold value electricity of at least one economize on electricity core voltage higher than the startup battery core balance of voltage function that chip is set When pressing VCB, at least one economize on electricity core voltage can not have battery core mistake less than the threshold voltage VCB for starting battery core balance of voltage function Event is protected in stream, 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, The specific balance of voltage function of chip unit itself is protected, but chip can be caused to generate heat in view of balanced balanced current, the design uses outer Portion's circuit balancing technology, is controlled by protection location, and the battery core balance of voltage is carried out by external circuit, is greatly improved balance electricity Stream, effectively achieves the mesh of the balance of voltage, while reduces the heating of protection location, makes the work that chip is more reliable;When protection core Piece BAT5 Port detectings are higher than VCB to CELL5, now shown in battery core balanced balanced current equation below:Ib=Vcell5/R16, it is public Formula;Ignore triode Q1 saturation voltage drop Vce;In order that balancing circuitry normal work, following condition must is fulfilled for:Chip internal PMOS between BAT5 and BAT4 is opened, and CELL20 is switched by resistance R21, chip internal, R22 formation Vcell5 electric discharge is returned Road, now 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 triode Q16 current amplification factor;
Then the voltage of R37 resistance is reduced to:VR37=(Ib1-IB) * R37, formula 5;
Calculated by formula 1- formula 5, optional suitable R37 resistance, the voltage for making balanced balanced current be formed at R37 both ends, VBE voltage drops more than Q16 and the voltage drop sum on R56, 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 is also not carried out 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;Concrete operating principle is as follows:Under battery bag normal charging condition, the high level CHG_CTR of single chip control unit output Signal the conducting of Q26 metal-oxide-semiconductors, ignores D, S side pressure drop, from MOS1, MOS2 S by being added in Q26 G poles after R162, R161 partial pressure The electric current IQ that is flowed through by resistance R159, R160 is held to be:IQ=VPACK/ (R159+R160), the then voltage at resistance R159 both ends For:VR159=IQ*R159, this voltage is MOS G, S terminal voltage, and magnitude of voltage is less than threshold voltage VGS, make MOS1, MOS2 is turned on, into charged state;Z11 voltage-stabiliser tubes are connected in parallel on PMOS G, S end, cause G, S end too high when exception occurs in circuit When, the action of Z11 voltage-stabiliser tubes, by G, S terminal voltage clamper in 16V safe operating voltage range, avoid pipe breakdown;In electricity When Chi Bao charges or put, instantaneous pressure caused by charger or motor work is superimposed upon MOS1, MOS2 D, S end, punctures MOS, Causing battery bag disabler, C98, C99 electric capacity are connected in parallel on MOS1, MOS2 D, S end, passage are provided for instantaneous pressure respectively, Protect MOS work safetys;Z18, Z12 are ESD electrostatic protection elements, and it is high to absorb the moment scurried into machine system work in battery Pressure energy amount, protect electronic component safety in MOS and battery bag;In battery bag charging process, such as chip is protected to detect battery core When overvoltage, excess temperature or battery bag stagnation pressure are higher than setting voltage, battery bag control chip single chip control unit is by CHR_CTR networks Signal is set to low level, and triode Q26 is switched to cut-off state by conducting state, and now MOS1, MOS1 VGS voltages are zero, Less than metal-oxide-semiconductor conducting voltage VTH, force two metal-oxide-semiconductors to turn off, stop charging, to ensure battery bag charging safety;
Gardens machine lithium cell charging program and voltage conversion circuit, when battery pack is in charging, discharged condition, single-chip microcomputer control Unit processed can detect battery voltage in real time, battery is worked in the rational voltage range set, ensure whole system Normal work, single chip control unit is by detecting the analog signal of the battery pack stagnation pressure that R155, R156 partial pressure obtain, simulation electricity Pressure value is:VBAT_AD=VBAT+*R156* (R155+R156), the magnitude of voltage of this analog signal are proportional to voltage bag total voltage, C80 filters out the high-frequency interferencing signal in R156 both end voltages in circuit, so as to the accurate sampling battery voltage of single chip control unit Signal;To reduce electric quantity consumption of the battery pack in dormancy situation, concatenation one opens MOS in divider resistance R155, R156 circuit Q25, in voltage detecting, BAT_AD_CTR network signals are set to high level by single-chip microcomputer, carry out voltage detecting, now Q25G, S Terminal voltage VGS is:VGS=R158/ (R157+R158) * 5;Single-chip microcomputer 5V powers;
To ensure that Q25 is reliably turned on, the resistance value of reasonable distribution R157, R158, is ensured in any case:
VGS (th) < VGS-VBAT_AD
When battery pack in a dormant state when, BAT_AD_CTR is low level, and Q25 metal-oxide-semiconductors switch to cut-off shape by conducting state State, off voltage detection circuit, while prevent battery pack from being discharged by sampling resistor, reduce electricity of the battery in idle condition Loss;After single chip control unit receives analog signal, changed by the analog to digital conversion circuit inside single chip control unit For data signal, corresponding action is performed compared with the voltage threshold set by single chip control unit, and according to comparing, when Sample obtained voltage signal it is higher than the threshold value set by single chip control unit when, it is meant that battery voltage is too high, when adopting When the voltage signal that sample obtains is lower than the threshold value set by single chip control unit, then mean that battery voltage is too low;Battery For group in charged state, single chip control unit detects that battery voltage is too high, and now single chip control unit will can charge Control CHR_CTR network signals are set to low level, and charge switch MOS1, MOS2 are off-state, while over-pressed signal is sent To charger, charger stops charge function;Double protection enforceable can stop charging, and battery is in discharge condition, monolithic Machine control unit detects that cell voltage is too low, then under-voltage signal is sent into complete machine control system, complete machine control system control Turn off battery discharge passage;
Gardens machine lithium cell charging program and voltage conversion circuit, it is further characterized in that, its voltage transformation module containing 5V, this is Power supply needed for system work is by being depressured by cell voltage, there is provided appropriate voltage is to SCM system and other circuits, specifically Realization is depressured by way of pulse width demodulator PWM, then puies forward 5V voltage supplieds by three terminal regulator, is powered to single-chip microcomputer, To improve circuit conversion efficiency, cancel powerful dropping resistor, and reduce related elements heating;Circuit conversion principle:Q32 makees To control the switch of PWM operating circuits, turn on when system is in running order, turn off during system dormancy, reduce the energy content of battery Consumption, single-chip microcomputer from resting state wake up have two ways:It is high by COM net transmissions 5V by charger or electric machine control system Level signal wakes up;Or by the system KEY button operations, it is depressured by battery voltage, there is provided single-chip microcomputer wake-up signal;When after After continuous circuit work, produce 5V voltages and powered to monolithic, monolithic processor controlled POWER_CTR signals are high level, pass through resistance R125, R205 are added in Q38 G, S end, Q38 conductings, and turn on Q32, when above-described one of which operational motion, 5V Voltage is added to MOS Q34 G, S end by resistance R121, R122 partial pressure, and magnitude of voltage is:VGS=R121/ (R121+R122) * 5V The resistance value of reasonable distribution R157, R158, make Q34 VGS > VGS (th), MOS conductings;The effect of C100 electric capacity filters out Q34 G, S The high-frequency interferencing signal at end, avoids circuit erroneous action, and Z19 voltage-regulator diodes are clamped by Q34 G, S ends electric capacity under any circumstance In the range of safe voltage, after Q34 conductings, biasing resistor R123, R124, Q34 that battery voltage BAT+ passes through Q32 triodes Loop is formed, turns on triode Q32 in pressure drop caused by R123, now, BAT+ voltages are added by current-limiting resistance R126, R127 To the input of pwm circuit, BAT+ passes through biasing resistor R113, R115 triode Q35 B, E end, Q35 is in saturation conduction State so that BAT+ forms loop by triode Q35 biasing resistor R114, R116, and the pressure drop at resistance R114 both ends makes Q33 Conducting, when Q33 triode ONs, the total positive voltage BAT+ of battery pack is again returned to by triode Q33, inductance L1, electric capacity EC2 The total negative terminal of battery, form charge circuit, according to distracted secondary law, L1 both end voltages to be left positive right negative, BAT+ after inductance partial pressure, Charged to electric capacity EC2, the voltage on EC2 electric capacity exports high-precision 5V voltages, to monolithic after the decompression of U6 three terminal regulators Machine provides operating voltage, while the electric current linear rise on L1, in energy storage stage, in stable state:Iinductor= (VBAT+-VEC2) * Ton/L, Iinductor:Inductor current value;VEC2:The output voltage of pwm circuit;Ton:Triode Q35 ON time,;Ton solution procedure is as follows:According to magnetic field equilibrium principle:(VBAT+-VEC2) * Ton=(VEC2-V diode)*Toff;
Ton=(VEC2-V diode) * T/VBAT+;T:Pwm circuit cycle of oscillation;The voltage-stabiliser tube diode Z8 in parallel with EC2 rises The effect of stable EC2 voltages, protection three terminal regulator U6 are operated in the range of safe voltage, in an abnormal situation EC2 electric capacity electricity Pressure rise, when voltage is higher than 22V, more than Z8 voltage-regulator diode breakdown reverse voltages, electric current flows through diode, by voltage stabilization In 22V;In energy storage stage, EC2 capacitance voltages are gradually increasing, when voltage rises to the threshold of Z9 voltage-regulator diode breakdown voltages During value, Z9 conductings, Vbe conducting voltages are provided to Q36, Q36 saturation conductions, so as to drag down triode Q35 base voltages, are caused Q35 is switched to cut-off state by conducting state, and before Q35 cut-offs, Q33 Vbe magnitudes of voltage are:Vbe=VBAT+*R114/ (R114+ R116);
This magnitude of voltage is more than Q33 on state threshold voltage, ensures Q33 conductings, after Q35 cut-offs, Q33 Vbe=0, Q33 cut-off, Battery pack BAT+ voltages are charged to EC2 electric capacity by inductance L1 and terminated by U6 to the VDD5V stages powered;When the poles of Q33 tri- When pipe turns off, disconnected from triode to the charge circuit inductance L1, the principle that can not be mutated according to L inductive currents, to maintain The sense of current and size are constant, and for the direction transformation of the induced electromotive force of inductance to be right positive left negative, inductance is in the shape to release energy State, current channel are:Electric current flows to electric capacity EC2 from L1, is charged to EC2 electrochemical capacitors, for maintaining load end VDD5V to be consumed Electricity, then from cross GND ends pass through sustained diode 10, D11 return inductance induced electromotive force negative terminal, Iinductor= (VEC2-V diode)*Toff/L;
Iinductor:Inductor current value;V diode:D10, D11 forward conduction tube voltage drop;Toff:When triode Q35 ends Between;
R117, C84 form RC circuits, there is provided pwm circuit frequency of oscillation fsw:Fsw=1/ (R117*C 84) * 109HZ;
Gardens machine lithium cell charging program and battery status display circuit, it is characterised in that its display unit containing battery status: Its effect is to be used as display device by four LEDs, by combinations of states, can correctly show the voltage, electricity, temperature of battery Degree, battery, if having unusual condition, judge the working condition residing for battery, single-chip microcomputer is according to voltage, the temperature letter sampled Breath, after treatment, LED1, LED2, LED3, LED4 signal are exported, show battery pack the present situation, R190, R191 in circuit, R192, R193 are current-limiting resistance, and protection LED will not be because of the excessive damage of electric current, if LED current value is ICURRENT, forward conduction Voltage is VFORWARD, then:
ICURRENT=(5-VFORWARD)/R;Single-chip microcomputer 5V powers, and R is that each current-limiting resistance value reasonably configures current-limiting resistance Value, makes LED operation electric current in the range of several milliamperes;
Specific each status display is described as follows:
Electricity is shown:
1. under battery pack charging status, LED is shown:
As 60 < VBAT of battery voltage, LED1, LED2, LED3, LED4 with 1HZ frequency scintillations,
As 60 < VBAT <=72V of battery voltage, LED1-3 is with 1HZ frequency scintillations, LED4 Chang Liang,
As 72 < VBAT <=76V of battery voltage, LED1-2 is with 1HZ frequency scintillations, LED3, LED4 Chang Liang,
As 76 < VBAT <=80V of battery voltage, LED1 is with 1HZ frequency scintillations, LED2, LED3, LED4 Chang Liang,
As 83.2 < VBAT of battery voltage, LED1, LED2, LED3, LED4 Chang Liang,
2. under battery power discharge and holding state, LED is shown:
As 80 < VBAT of battery voltage, LED1, LED2, LED3, LED4 Chang Liang,
As 76 < VBAT <=80V of battery voltage, LED2, LED3, LED4 Chang Liang, LED1 go out,
As 72 < VBAT <=76V of battery voltage, LED3, LED4 Chang Liang, LED1, LED2 go out,
As 60 < VBAT <=72V of battery voltage, LED4 Chang Liang, LED1, LED2, LED3 go out,
As battery voltage VBAT < 60V, LED1, LED2, LED3, LED4 go out,
3. battery pack is in charging excess temperature or owes warm, LED is shown:
LED1, LED2, LED3, LED4 with 1HZ frequency scintillations,
4. battery pack is in electric discharge excess temperature or owes warm, LED is shown:
LED1, LED2, LED3, LED4 with 2HZ frequency scintillations,
Set by above LED dispaly states, user is clear from understanding battery pack conditions, carries out appropriate action in time, carries High user's usage comfort;
Gardens machine lithium cell charging program and battery status display circuit, it contains charging procedure,
CN201710989349.6A 2017-10-15 2017-10-15 Gardens machine lithium cell charging program and battery status display circuit CN107733019A (en)

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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
CN206557356U (en) * 2017-03-15 2017-10-13 东莞市颖川鸿电池科技有限公司 A kind of super low-power consumption battery voltage detection circuit

Patent Citations (8)

* 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
US20080296107A1 (en) * 2007-05-29 2008-12-04 Porter Steven R Parking brake actuator with spring force provided by flexible actuator cable
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
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Application publication date: 20180223