CN107593084A - Gardens machine lithium cell charging program and single chip machine controlling circuit - Google Patents
Gardens machine lithium cell charging program and single chip machine controlling circuit Download PDFInfo
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- CN107593084A CN107593084A CN201710989396.0A CN201710989396A CN107593084A CN 107593084 A CN107593084 A CN 107593084A CN 201710989396 A CN201710989396 A CN 201710989396A CN 107593084 A CN107593084 A CN 107593084A
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 92
- WHXSMMKQMYFTQS-UHFFFAOYSA-N lithium Chemical compound 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Abstract
Gardens machine is with lithium cell charging program and single chip machine controlling circuit, program containing lithium cell charging and control pwm pulse function；The balancing 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：By four LEDs show battery voltage, electricity, temperature and battery whether 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
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 single chip machine controlling 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 single chip machine controlling 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 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 Q26 G 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：This voltage of VR159=IQ*R159 is
MOS G, S terminal voltage, and magnitude of voltage is less than threshold voltage VGS, turns on MOS1, MOS2, into charged state；Z11 voltage-stabiliser tubes
PMOS G, S end is connected in parallel on, when, which there is exception, in circuit causes G, S end too high, Z11 voltage-stabiliser tubes action, by G, S terminal voltage clamper
In 16V safe operating voltage range, avoid pipe breakdown；When battery bag charges or put, charger or motor work
Caused instantaneous pressure is superimposed upon MOS1, MOS2 D, S end, punctures MOS, causes battery bag disabler, C98, C99 electric capacity point
MOS1, MOS2 D, S end are not connected in parallel on, are provided passage for instantaneous pressure, are protected MOS work safetys；Z18, Z12 are ESD electrostatic
Protection element, absorb in machine system work and scurry into the instantaneous pressure energy in battery, protect in FET MOS and battery bag
Electronic component safety；
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 Q25 metal-oxide-semiconductors 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 heat of the temperature with resistance value relation for negative characteristic
Sensitive resistor, temperature is higher, and the resistance value of temperature-sensitive is smaller, then the voltage for the battery temperature signal that single chip control unit detects
It is worth smaller, therefore, when battery temperature signal magnitude of voltage is bigger than the low temperature threshold that single chip control unit is set, illustrates battery temperature
Degree is less than the temperature value set, it is meant that battery temperature is low temperature, and battery temperature abnormal signal is set to by single chip control unit
High level, on the contrary, when the value of battery temperature detection signal is smaller than high temperature threshold value, then mean that battery is in the condition of high temperature,
Battery temperature abnormal signal is set to high level by single chip control unit；Other single chip control units are receiving battery in system
During the battery temperature abnormal information that the single chip control unit of bag is sent, battery bag charge or discharge control is set forcibly to stop
Only；When single chip control unit is by detecting R179, NTC1；The battery temperature analog signal that R156, NTC2 partial pressure obtain, and will
Obtained analog signal passes through analog to digital conversion circuit, is converted to the data signal that single chip control unit can identify, with single-chip microcomputer
Threshold value set by control unit compares, when the temperature value detected higher than low temperature threshold or less than high temperature threshold value or when, all
The temperature for being judged as battery is abnormality, and single chip control unit makes battery bag be stopped by control signal, wherein,
C82, C94 filter out the interference signal at NTC1, NTC2 both ends respectively, so as to the accurate sampling battery temperature letter of single chip control unit
Number；The design employs two-way temperature monitoring circuit, and the operating temperature situation of each battery is detected according to the temperature difference of each battery core；
Its display unit containing battery status：It is used as display device by four LEDs, by combinations of states, can correctly shows 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 single chip machine controlling circuit, supply lithium cell charging voltage are 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
Charging procedure circuit display unit containing battery status is controlled, is used as display device by four LEDs, can by combinations of states
Voltage, electricity, temperature and the battery of correct display battery whether unusual condition etc., the work shape residing for battery can be judged accordingly
State；Gardens machine lithium cell charging program and single chip machine controlling circuit, its detection process of Voltage unbalance containing lithium cells electricity
Road, 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 the balancing technique of intelligence, concrete operating principle are as follows：Protect the chip battery assembly module mistake that the string of monitoring five battery core forms in real time
The analog signal for each battery core come, detection port network name are respectively：BAT1, BAT2, BAT3, BAT4, BAT5, each port difference
The both ends for each single-unit battery core being connected in parallel in battery pack, protection chip perform equilibrium function, it is necessary to meet following condition：In electricity
Under pond group charging or holding state, threshold of at least one economize on electricity core voltage higher than the startup battery core balance of voltage function that chip is set
During threshold voltage VCB, at least one economize on electricity core voltage can not have electricity less than the threshold voltage VCB for starting battery core balance of voltage function
Event is protected in core excessively 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 work(
Can, 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
External circuit balancing technique, is controlled by protection location, is carried out the battery core balance of voltage by external circuit, is greatly improved balance
Electric 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；Work as protection
Chip 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, 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
RC filter circuits are formed, filter out the high-frequency interferencing signal at BATn ends, avoid battery core balancing circuitry from malfunctioning；The design is multiple guarantors
The high-voltage battery component that shield chip cascade uses, battery core balanced design is multiple protection chip linkage works, whole to ensure
All battery core voltages of battery bag can balance；If be responsible for least significant end five go here and there battery core protection chip detect battery be in put
During electricity condition, then stop all protection chip balance plays；If least significant end protection chip has detected overvoltage, excess temperature, short circuit
When occurring Deng protection event, then suspend the balance play of all protection chips；If the battery strings that certain grade of protection chip is responsible for
In have under-voltage protection event generation when, suspend the balance play in this battery pack, but not send a signal to other protection chips
Stop balance play；Containing charging control unit, effect be battery bag occur charging stagnation pressure overvoltage, single-unit battery core, the excessively stream that charges,
When excess temperature or charger occur abnormal, single chip control unit turns off charge tunnel, ensures charging by controlling this element circuit
Safety；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 Q26 metal-oxide-semiconductors, ignore D, S side pressure drop, from MOS1, MOS2 by being added in Q26 G poles after R162, R161 partial pressure
The electric current IQ that is flowed through by resistance R159, R160 of S ends be：IQ=VPACK/ (R159+R160), the then electricity at resistance R159 both ends
Press and be：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；Its temperature containing battery core
Spend detection unit：For battery bag when charge or discharge work, operating current is very big, and battery core temperature rises, to make in suitable temperature
Battery core is worked in the range of degree, and temperature sensing circuit is employed in the design；Temperature detecting function is to be based on inputting from battery pack
The analog signal of reaction cell temperature information monitor battery temperature, single chip control unit leads to the analog signal sampled
Cross internal analog to digital conversion circuit and be converted to the data signal that single chip control unit can identify, comparative cell temperature detection signal
Magnitude of voltage and low temperature threshold and high temperature threshold value, also, it is bigger than low temperature threshold or than high in the magnitude of voltage of battery temperature detection signal
In the case that warm threshold value is small, the temperature for being judged as battery is abnormality；The thermal resistor used in the design be temperature with
Resistance value relation is the thermal resistor of negative characteristic, and temperature is higher, and the resistance value of temperature-sensitive is smaller, then single chip control unit detects
The magnitude of voltage of the battery temperature signal arrived is smaller, therefore, is set when battery temperature signal magnitude of voltage than single chip control unit
When low temperature threshold is big, illustrate battery temperature less than the temperature value set, it is meant that battery temperature is low temperature, single chip control unit
Battery temperature abnormal signal is set to high level；On the contrary, when the value of battery temperature detection signal is smaller than high temperature threshold value, then anticipate
Taste battery and is in the condition of high temperature, and battery temperature abnormal signal is set to high level by single chip control unit；Other lists in system
Piece machine control unit stops battery in the battery temperature abnormal information that the single chip control unit for receiving battery bag is sent；Garden
Woods machine lithium cell charging program and control charging procedure circuit, it is characterised in that 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.
Has the gardens machine of lithium cells Voltage unbalance detection process circuit, it is characterised in that supply lithium cell charging
Voltage is not the DC charging of traditional constant pressure and flow, but by the rectified voltage of lithium battery charging circuit and by being originally intended to
Produced by multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of spark-erosion machine tool is drawn
Multi resonant superimposed voltage as charged in the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula.
Usefulness：Have lithium cells Voltage unbalance detection process circuit gardens machine, its ji containing process circuit and
Control unit and voltage transformation module and temperature monitoring circuit：To linear regulator chip by way of pulse width modulation (PWM)
Voltage is provided, ensures voltage stabilizing chip safety；Supply lithium cell charging voltage is not the DC charging of traditional constant pressure and flow, but
The arteries and veins drawn by the rectified voltage and the astatic multivibrator by being originally intended to spark-erosion machine tool of lithium battery charging circuit
Multi resonant superimposed voltage caused by rushing the multi resonant superimposed voltage element circuit mixed by voltage passes through lithium such as multiple spot acupuncture formula
The hole of the storage electric charge of the inside of battery and charge, fast and safety and power is big.Comprehensive composition one kind can reach effectiveness in vibration suppression
There is an improvement, noise reduction has an improved low vibration grass-mowing machine, evolutionary operation, lifts the quality and frock usability of product, and
Safety in utilization.Electronic beaten the grass for what the place such as beside flower bed, garden, park and road cut the grass on a lawn the present invention relates to a kind of
Machine, especially a kind of improvement of low vibration grass-mowing machine, the expansion link of grass-mowing machine 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 motor and line box base axiality and have the charging grass-mowing machine of lithium battery multi resonant superimposed voltage composite portfolio element circuit.One
The more line of rabbet joint of kind grass-mowing machine abnormity, described special-shaped line are characterized in being provided with multiple asymmetric notches (34a) on its section, had a variety of
Various edge of a knife is selected, to adapt to the mowing kind of different soft and hard；Has lithium battery multi resonant superimposed voltage composite portfolio element circuit
Charge grass-mowing machine, and it contains 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 as computing control
Center processed, 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
Small, precision is high, chip strong antijamming capability, simplifies hardware circuit design and reduces the ineffectiveness high phenomenon of hardware circuit.
Has the gardens machine of lithium cells Voltage unbalance detection process 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.
Has the gardens machine of lithium cells Voltage unbalance detection process 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,
Has the gardens machine of lithium cells Voltage unbalance detection process 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,
Q26 G poles are added in after R161 partial pressures, the conducting of Q26 metal-oxide-semiconductors, ignores D, S side pressure drop, passes through resistance from MOS1, MOS2 S ends
The electric current IQ that R159, R160 flow through is：
IQ=VPACK/ (R159+R160)
Then the voltage at resistance R159 both ends is：
VR159=IQ*R159
This voltage is 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；
Has the gardens machine of lithium cells Voltage unbalance detection process 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 the accurate sampling battery voltage signal of single chip control unit.
The magnitude of voltage sampled such as single chip control unit is higher than set charging voltage threshold value, then illustrates at battery 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,
Q25 metal-oxide-semiconductors 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
Have the gardens machine of lithium cells Voltage unbalance detection process circuit, its temperature detecting unit containing battery core：Battery
For bag when charge or discharge work, operating current is very big, and battery core temperature rises, to make the battery core work within the scope of suitable temperature
Make, temperature sensing circuit is employed in the design；Temperature detecting function is based on the reaction cell temperature inputted from battery pack
The analog signal of information monitors battery temperature, and the analog signal sampled passes through internal analog-to-digital conversion by single chip control unit
Circuit conversion is the data signal that single chip control unit can identify, specifically, the voltage of comparative cell temperature detection signal
Value and low temperature threshold and high temperature threshold value, also, it is bigger than low temperature threshold or than high temperature threshold in the magnitude of voltage of battery temperature detection signal
Be worth it is small 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,
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 temperature monitoring circuit, to the greatest extent
The operating temperature situation of possible actual each battery.
Gardens machine lithium cell charging program and control charging procedure 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 control charging procedure circuit, supply lithium cell charging voltage is not traditional
The DC charging of constant pressure and flow, its be by lithium battery charging circuit rectified voltage and by be originally intended to spark-erosion machine tool from
Swash multi resonant superimposed voltage caused by the multi resonant superimposed voltage element circuit mixed by the pulse voltage that multivibrator is drawn
Charged such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula；Described astatic multivibrator institute
The pulse voltage of extraction is 80 volts, and pulse frequency is 80 kilo hertzs；By connecting between the voltage of the rectification and the pulse voltage
Electric capacity be connected with the differential circuit that bypass resistance is formed.Has the gardens machine of lithium battery voltage converter unit 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 control charging procedure circuit, it contains single chip control unit and voltage transformation
Unit and temperature monitoring circuit：Voltage is provided to linear regulator chip by way of pulse width modulation (PWM), ensures voltage stabilizing core
Piece safety；Supply lithium cell charging voltage is not the DC charging of traditional constant pressure and flow, but by lithium battery charging circuit
The multi resonant mixed by pulse voltage that rectified voltage and the astatic multivibrator as being originally intended to spark-erosion machine tool is drawn
Multi resonant superimposed voltage caused by superimposed voltage element circuit is such as the storage electricity of the inside by lithium battery of multiple spot acupuncture formula
The hole of lotus and charge, fast and safety and power is big.It contains voltage transformation module, will by way of pulse width modulation (PWM)
Battery bag voltage step-down, voltage is provided to linear regulator chip, ensures that voltage stabilizing chip is operated in the range of safe voltage, circuit is special
Point：PWM is depressured, and reduces power, cancels powerful dropping resistor, improves conversion efficiency, and reduces related elements heating；It is beneficial
Effect is a kind of high-power charging of energy of comprehensive composition and safe charging, and reaching effectiveness in vibration suppression has improvement, and noise reduction has improved
The dual-purpose type of low vibration, evolutionary operation, lift the quality of product and frock usability, and safety in utilization.
Gardens machine lithium cell charging program and control charging procedure 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 88 volts, pulse frequency is 88 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；The tool lithium cell charging control
The gardens machine of element circuit contains charging control unit, and it is the overvoltage of charging stagnation pressure, single-unit battery core, charging occur in battery bag that it, which is acted on,
When excessively stream, excess temperature or charger occur abnormal, single chip control unit turns off charge tunnel, protected by controlling this element circuit
Card 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 Q26 metal-oxide-semiconductors, ignore D, S side pressure drop by being added in Q26 G 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 moving average filter method circuit, it supplies lithium cell charging voltage multi resonant
The DC charging of superimposed voltage rather than traditional constant pressure and flow, its be by lithium battery charging circuit rectified voltage and by
It is originally intended to the multi resonant superimposed voltage element circuit mixed by the pulse voltage that the astatic multivibrator of spark-erosion machine tool is drawn
Caused multi resonant superimposed voltage charges such as the hole of the storage electric charge of the inside by lithium battery of multiple spot acupuncture formula；Institute
The pulse voltage that the astatic multivibrator stated is drawn is 99 volts, and pulse frequency is 99 kilo hertzs；The voltage of the rectification and institute
State and be connected by the electric capacity connected with the differential circuit that bypass resistance is formed between pulse voltage；The tool lithium battery electric core temperature
Spend the gardens machine of detection cell circuit, its temperature detecting unit containing battery core：Battery bag is when charge or discharge work, operating current
Very big, battery core temperature rises, and to make the battery core within the scope of suitable temperature work, temperature sensing circuit is employed in the design；
Temperature detecting function is to monitor battery temperature based on the analog signal of the reaction cell temperature information inputted from battery pack, single
The analog signal sampled is converted to single chip control unit by internal analog to digital conversion circuit and can identified by piece machine control unit
Data signal, the magnitude of voltage of comparative cell temperature detection signal and low temperature threshold and high temperature threshold value, also, examined in battery temperature
Survey signal magnitude of voltage it is bigger than low temperature threshold or smaller than high temperature threshold value in the case of, the temperature for being judged as battery is abnormality；
The thermal resistor used in the design is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is higher, temperature-sensitive
Resistance value it is smaller, then the magnitude of voltage for the battery temperature signal that single chip control unit detects is smaller, therefore, works as battery temperature
When signal voltage value is bigger than the low temperature threshold that single chip control unit is set, illustrate battery temperature less than the temperature value set, meaning
It is low temperature that taste, which battery temperature, and battery temperature abnormal signal is set to high level by single chip control unit；On the contrary, work as battery temperature
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；Concrete operating principle is as follows：Work as list
Piece machine control unit is by detecting R179, NTC1；Battery temperature analog signal that R156, NTC2 partial pressure obtain, and will obtain
Analog signal passes through analog to digital conversion circuit, is converted to the data signal that single chip control unit can identify, is controlled with single-chip microcomputer single
Threshold value set by member compares, when the temperature value detected higher than low temperature threshold or less than high temperature threshold value or when, be all judged as
The temperature of battery is abnormality, and single chip control unit makes battery bag be stopped by control signal, wherein, C82, C94
The interference signal at NTC1, NTC2 both ends is filtered out respectively, so as to the accurate sampling battery temperature signal of single chip control unit；Because of reality
The temperature of each battery core of battery can be variant in work, and the design employs two-way temperature monitoring circuit, and actual monitored as far as possible is each
The operating temperature situation of battery, it is safe to use, get twice the result with half the effort.
Usefulness：
Gardens machine lithium cell charging program and control charging procedure 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
Battery charging procedure and control charging procedure circuit, it is characterised in that supply lithium cell charging voltage with multi resonant superimposed voltage and
It is not 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 electric fire
It is more caused by the multi resonant superimposed voltage element circuit mixed by pulse voltage that the astatic multivibrator of flower lathe is drawn
Humorous 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 is more
The pulse voltage that harmonic oscillator is drawn is 88 volts, and pulse frequency is 88 kilo hertzs；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；The tool lithium battery status display unit circuit
Gardens machine, its display unit containing battery status, be used as display device by four LEDs, by combinations of states, can correctly show
Show battery voltage, electricity, temperature and battery whether unusual condition etc., the working condition residing for battery can be judged accordingly；Gardens
Machine lithium cell charging program and control charging procedure circuit, are further characterized in that, the inspection of its Voltage unbalance containing lithium cells
Process circuit is surveyed, there is the uneven detection of battery cell voltage and Balance Treatment function；The design circuit single-unit battery core is unbalanced
The balancing technique of detection function and intelligence, concrete operating principle are as follows：Protect the chip battery that the string of monitoring five battery core forms in real time
The analog signal for each battery core that group unit comes, detection port network name are respectively：BAT1, BAT2, BAT3, BAT4, BAT5, respectively
Port is connected in parallel on the both ends of each single-unit battery core in battery pack respectively, and protection chip performs equilibrium function, it is necessary to meets following
Condition：Under battery pack charging or holding state, at least one economize on electricity core voltage is put down higher than the startup battery core voltage that chip is set
During the threshold voltage VCB for the function that weighs, at least one economize on electricity core voltage is less than the threshold voltage for starting battery core balance of voltage function
VCB, there can not be 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 opens
Dynamic balance of voltage function, the specific balance of voltage function of chip unit itself is protected, but chip can be caused to send out in view of balanced balanced current
Heat, the design use external circuit balancing technique, controlled by protection location, and the battery core balance of voltage is carried out by external circuit,
Balanced balanced current is greatly improved, effectively achieves the mesh of the balance of voltage, while reduces the heating of protection location, makes chip more reliable
Work；When protection chip BAT5 Port detectings be 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 is necessary
Meet：PMOS between chip internal BAT5 and BAT4 is opened, and CELL20 is by the way that resistance R21, chip internal are switched, R22 is formed
Vcell5 discharge loop, 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, 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 in gardens machine lithium cell charging program and single chip machine controlling circuit fills
Electric program, 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.Has lithium
Its display unit containing battery status of the gardens machine of battery cell voltage imbalance detection process circuit, it is used as by four LEDs aobvious
Show device, by combinations of states can correctly show battery voltage, electricity, temperature and battery whether unusual condition, can be accordingly
Judge the working condition residing for battery, it is very clear.Supply lithium cell charging voltage multi resonant superimposed voltage rather than traditional
The DC charging of constant pressure and flow, it is drawn by the rectified voltage of lithium battery charging circuit and by astatic multivibrator
Pulse voltage mixed by multi resonant superimposed voltage element circuit caused by multi resonant superimposed voltage it is logical such as multiple spot acupuncture formula
The hole for the storage electric charge for crossing the inside of lithium battery and charge；Pulse voltage is 88 volts, and pulse frequency is 88 kilo hertzs；Commutating voltage
The differential circuit being made up of between pulse voltage the electric capacity and bypass resistance connected mutually is arranged in pairs or groups, and 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, the gardens machine for having lithium cells Voltage unbalance detection process circuit, and it contains lithium
Battery cell voltage imbalance detection process circuit, there are the uneven detection of battery cell voltage and Balance Treatment function；The design
The balancing technique of the unbalanced detection function of circuit single-unit battery core and intelligence, comprehensive composition effect of vibration and noise reduction have the series of improvement
Gardens 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 single chip machine controlling circuit contains：
Usefulness：Gardens machine has with lithium cell charging program and control charging procedure circuit, program containing lithium cell charging
Detection and processing function；The detection function of circuit single-unit battery core and the balancing technique of intelligence, effect are self-evident.Its journey containing charging
Sequence and process circuit, also containing single chip control unit, the side combined using reserve battery protection chip with single chip control unit
Formula, make circuit stability reliable, ensure battery under various conditions can normal work, the single chip control unit is as computing
Control centre, 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, by mistake
Difference is small, and precision is high, chip strong antijamming capability, simplifies hardware circuit design and reduces the ineffectiveness high phenomenon of hardware circuit；
It contains voltage transformation module：By battery bag voltage step-down by way of pulse width modulation (PWM), provided to linear regulator chip
Voltage, ensure that voltage stabilizing chip is operated in the range of safe voltage, electric circuit characteristic：PWM is depressured, and reduces power, is cancelled powerful
Dropping resistor, conversion efficiency is improved, and reduce related elements heating.Supply lithium cell charging voltage with multi resonant superimposed voltage without
It is 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 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；Described Self-excitation Multi
The pulse voltage that oscillator is drawn is 88 volts or so, and pulse frequency is 88 kilo hertzs or so；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；Battery bag works in charge or discharge
When, operating current is very big, and battery core temperature rises, and to make the battery core within the scope of suitable temperature work, employs temperature detection electricity
Road；Temperature detecting function is to monitor battery temperature based on the analog signal of the reaction cell temperature information inputted from battery pack
The analog signal sampled is converted to single chip control unit energy by degree, single chip control unit by internal analog to digital conversion circuit
The data signal of identification, magnitude of voltage and low temperature threshold and the high temperature threshold value of comparative cell temperature detection signal, also, in battery temperature
Spend detection signal magnitude of voltage it is bigger than low temperature threshold or smaller than high temperature threshold value in the case of, the temperature for being judged as battery is abnormal shape
State；The thermal resistor used in the design is temperature and the thermal resistor that resistance value relation is negative characteristic, and temperature is higher, heat
Quick 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
When degree signal voltage value is bigger than the low temperature threshold that single chip control unit is set, illustrate temperature value of the battery temperature less than setting,
It is low temperature to mean battery temperature, and battery temperature abnormal signal is set to high level by single chip control unit.
Gardens machine is with lithium cell charging program and single chip machine controlling circuit, program containing lithium cell charging and control pwm pulse
Function；The balancing technique effect of detection function and intelligence is self-evident.Comprehensive composition effect of vibration and noise reduction has 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.Its display unit containing battery status：Pass through four
LED show battery voltage, electricity, temperature and battery whether unusual condition, it is very clear.Lithium cell charging voltage is supplied to use
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, commutating voltage with
Mutually arranged in pairs or groups with the differential circuit that bypass resistance is formed by the electric capacity connected between pulse voltage.
Claims (1)
1. gardens machine lithium cell charging program and single chip machine controlling circuit, it contains charging procedure and process circuit, also containing monolithic
Machine 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, it is various to be responsible for sampling as operation control center the single chip control unit
Ensure the analog signal of normal battery operation, and be converted to the data signal needed for control, error is small, and precision is high, and chip is anti-dry
Disturb that ability is strong, simplify hardware circuit design and reduce the ineffectiveness high phenomenon of hardware circuit；It contains voltage transformation module：Pass through
Battery bag voltage step-down is given linear regulator chip to provide voltage by the mode of pulse width modulation (PWM), ensures voltage stabilizing chip work
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 passes through three
Pole pipe Q33, inductance L1, electric capacity EC2 again return to the total negative terminal of battery, form charge circuit, BAT+ is after inductance partial pressure, to electricity
Hold EC2 chargings, to maintain load end VDD5V electric quantity consumption, while L1 is in energy storage state, during charging, EC2 electricity
Hold voltage to be gradually increasing, when voltage rises to Z9 voltage-regulator diode breakdown voltages, Z9 conductings, Vbe electric conductions are 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 metal-oxide-semiconductor 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 PMO5 pipe G, S ends, 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 control pwm pulse 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 control pwm pulse circuit, its detection process circuit of Voltage unbalance containing lithium cells, have
The uneven detection of battery cell voltage and Balance Treatment function；The unbalanced detection function of the design circuit single-unit battery core and intelligence
Balancing technique, concrete operating principle is as follows：The protection chip battery assembly module that the string of monitoring five battery core forms in real time comes each
The analog signal of battery core, detection port network name are respectively：BAT1, BAT2, BAT3, BAT4, BAT5, each port are connected in parallel on respectively
The both ends of each single-unit battery core in battery pack, protection chip perform equilibrium function, it is necessary to meet following condition：Filled in battery pack
Under electricity or holding state, threshold voltage of at least one economize on electricity core voltage higher than the startup battery core balance of voltage function that chip is set
During VCB, at least one economize on electricity core voltage less than the threshold voltage VCB for starting battery core balance of voltage function, can not have battery core excessively stream,
Event is protected in excess temperature, short circuit etc., and battery core is over-pressed, except single-unit battery core low-temperature protection, then starts balance of voltage function, protection
The specific balance of voltage function of chip unit itself, but chip can be caused to generate heat in view of balanced balanced current, the design uses external electrical
Road balancing technique, is controlled by protection location, is carried out the battery core balance of voltage by external circuit, is greatly improved balanced balanced current,
The mesh of the balance of voltage is effectively achieved, while reduces the 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：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；A filter capacitor C24-C28 is placed between battery core voltage detecting port BAT1-BAT5 and ground network, with R21-R25 groups
Into RC filter circuits, the high-frequency interferencing signal at BATn ends is filtered out, avoids battery core balancing circuitry from malfunctioning；The design is multiple protections
The high-voltage battery component that chip cascade uses, battery core balanced design is multiple protection chip linkage works, to ensure whole electricity
Chi Bao all battery core voltages can balance；If the protection chip for being responsible for the string battery core of least significant end five detects battery and is in electric discharge
During state, then stop all protection chip balance plays；If least significant end protection chip has detected overvoltage, excess temperature, short circuit etc.
When protection event occurs, then suspend the balance play of all protection chips；If in the battery strings that certain grade of protection chip is responsible for
When having the generation of under-voltage protection event, suspend the balance play in this battery pack, but not send a signal to other protection chips and stop
Only balance play；Containing charging control unit, effect is that the overvoltage of charging stagnation pressure, single-unit battery core, charging excessively stream, mistake occur in battery bag
When temperature or charger occur abnormal, single chip control unit turns off charge tunnel, ensures charging peace by controlling this element circuit
Entirely；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；Its temperature containing battery core
Spend detection unit：For battery bag when charge or discharge work, operating current is very big, and battery core temperature rises, to make in suitable temperature
Battery core is worked in the range of degree, and temperature sensing circuit is employed in the design；Temperature detecting function is to be based on inputting from battery pack
The analog signal of reaction cell temperature information monitor battery temperature, single chip control unit leads to the analog signal sampled
Cross internal analog to digital conversion circuit and be converted to the data signal that single chip control unit can identify, comparative cell temperature detection signal
Magnitude of voltage and low temperature threshold and high temperature threshold value, also, it is bigger than low temperature threshold or than high in the magnitude of voltage of battery temperature detection signal
In the case that warm threshold value is small, the temperature for being judged as battery is abnormality；The thermal resistor used in the design be temperature with
Resistance value relation is the thermal resistor of negative characteristic, and temperature is higher, and the resistance value of temperature-sensitive is smaller, then single chip control unit detects
The magnitude of voltage of the battery temperature signal arrived is smaller, therefore, is set when battery temperature signal magnitude of voltage than single chip control unit
When low temperature threshold is big, illustrate battery temperature less than the temperature value set, it is meant that battery temperature is low temperature, single chip control unit
Battery temperature abnormal signal is set to high level；On the contrary, when the value of battery temperature detection signal is smaller than high temperature threshold value, then anticipate
Taste battery and is in the condition of high temperature, and battery temperature abnormal signal is set to high level by single chip control unit；Other lists in system
Piece machine control unit stops battery in the battery temperature abnormal information that the single chip control unit for receiving battery bag is sent；
Gardens machine lithium cell charging program and single chip machine controlling circuit, it is characterised in that it contains charging procedure,
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| CN201710989396.0A CN107593084A (en) | 2017-10-15 | 2017-10-15 | Gardens machine lithium cell charging program and single chip machine controlling circuit |
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