CN107482712A - Power-off protection method, protection circuit, the off-network controller of off-network lithium battery reversal connection - Google Patents
Power-off protection method, protection circuit, the off-network controller of off-network lithium battery reversal connection Download PDFInfo
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- CN107482712A CN107482712A CN201710671720.4A CN201710671720A CN107482712A CN 107482712 A CN107482712 A CN 107482712A CN 201710671720 A CN201710671720 A CN 201710671720A CN 107482712 A CN107482712 A CN 107482712A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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Abstract
The present invention provides the power-off protection method of off-network lithium battery reversal connection, state sampling, controller collection lithium battery side electrical potential information；Condition adjudgement, judge whether lithium battery state is reversal connection state according to lithium battery side electrical potential information, connect circuit between shutoff signal cut-out lithium battery and controller if so, then sending, charged normal if it is not, then performing lithium battery.The invention further relates to the protection circuit of off-network lithium battery reversal connection, off-network controller.The present invention simply, efficiently, can easily distinguish the reversal connection state of lithium battery using the lithium battery state sample mode for being different from controller in the market, in the case of access solar energy input, reverse connection of accumulator is detected, can also be reacted rapidly, charge circuit is cut off, it is safe and reliable.The present invention is reasonable in design, is skillfully constructed, and solves off-network controller protection problem during lithium battery reversal connection, effectively improves the security of off-network solar energy system, avoid unnecessary damage, while reduce off-grid system wiring difficulty.
Description
Technical field
The present invention relates to off-network controller, more particularly to the power-off protection method of off-network lithium battery reversal connection, protection circuit, from
Net controller.
Background technology
In the market can have battery counnter attack connection function to the controller for solar of lithium cell charging, but before
It is that can not first connect solar energy input to carry, and when solar energy inputs access controller for solar, now accesses the lithium electricity of reversal connection again
Pond can cause the damage of controller, so when most of controller is installed, the order of connection can be all provided on specification, is first connect
Battery, then load end is connect, then solar energy input is connect, it is so cumbersome for unfamiliar wiring person, easily there is mistake
And protection is not in place.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide the power-off protection side of off-network lithium battery reversal connection
Method, the present invention monitor the state of lithium battery by governor circuit and lithium battery sample circuit in real time, are cut off according to the data of monitoring
Controller power source signal is returned, and ensures safety governor internal circuit.
The present invention provides the power-off protection method of off-network lithium battery reversal connection, comprises the following steps：
State samples, controller collection lithium battery side electrical potential information；
Condition adjudgement, judge whether lithium battery state is reversal connection state according to lithium battery side electrical potential information, if so, then sending
Shutoff signal is cut off and connects circuit between lithium battery and controller, is charged normal if it is not, then performing lithium battery.
The protection circuit of off-network lithium battery reversal connection, including on-off circuit, drive circuit；Described in described drive circuit driving
On-off circuit break-make；Described on-off circuit both ends connect solar panels leading-out terminal and lithium battery leading-out terminal respectively；Described
Drive circuit accesses controller for solar main control chip control signal；Controller for solar main control chip sends shutoff signal, warp
The circuit connected between described drive circuit driving described on-off circuit break-make cut-out lithium battery and controller.
Further, described on-off circuit includes first switch circuit, second switch circuit；Described drive circuit bag
Include the first drive circuit, the second drive circuit；
Described first switch circuit includes switching tube Q1, switching tube Q4；Described switching tube Q1, switching tube Q4 is parallel to
Between solar panels leading-out terminal and described second switch circuit；Described switching tube Q1 and described switching tube Q4 S levels with
Solar panels leading-out terminal connects, and described switching tube Q1 and described switching tube Q4 D levels connect with described second switch circuit
Connect；
Described second switch circuit includes switching tube Q2, switching tube Q3；Described switching tube Q2, switching tube Q3 is parallel to
Between lithium battery leading-out terminal and described first switch circuit；Described switching tube Q2 and described switching tube Q3 S levels and lithium
Battery leading-out terminal is connected, and described switching tube Q2 is connected with described switching tube Q3 D levels with described first switch circuit；
The described first switch circuit of described the first drive circuit driving；The first described drive circuit includes diode
D1, diode D2, diode D6, triode Q10, triode Q12, resistance R26, resistance R27, resistance R20, resistance R24, resistance
R30, resistance R32, resistance R33；Described triode Q10 is positive-negative-positive, and described triode Q12 is NPN type；Two described poles
The described switching tube Q1 of pipe D1 accesses in parallel with described diode D2 negative pole and described switching tube Q4 both ends；Described two
Pole pipe D1 positive pole is connected with described resistance R26；Described diode D2 positive pole and described resistance R27；Described electricity
Hinder the R26 triode Q10s described with described resistance R27 accesses C poles；Described in described triode Q10 BE interpolar parallel connections
Resistance R20；The positive pole of diode D6 described in described triode Q10 B poles connection；Described diode D6 negative pole connects
Meet described resistance R24；Described resistance R24 is connected with described triode Q12 C poles；Described triode Q12 E poles
Resistance R33 is connected between ground connection；Described triode Q12 BE interpolars are parallel with resistance R32；Described triode Q12 B
Resistance R30 is connected between pole and main control chip；
The described second switch circuit of described the second drive circuit driving；The second described drive circuit includes diode
D5, triode Q6, triode Q11, resistance R94, resistance R17, resistance R22, resistance R25, resistance R28, resistance R31；Described
Triode Q6 is positive-negative-positive, and described triode Q11 is NPN type；Described resistance R94 be respectively connected to described switching tube Q2 with
Described switching tube Q3 G poles；The described triode Q6 of described R94 other ends access C poles；Described triode Q6 BE
Resistance R17 described in interpolar parallel connection；The positive pole of diode D5 described in described triode Q6 B poles connection；Two described poles
Resistance R22 described in pipe D5 negative pole connection；Described resistance R22 is connected with described triode Q11 C poles；Described three
Resistance R31 is connected between pole pipe Q11 E poles and ground connection；Described triode Q11 BE interpolars are parallel with resistance R28；Described
Resistance R25 is connected between triode Q11 B poles and main control chip.
Further, the first described drive circuit also includes triode group Q9；Described first switch circuit also includes
Resistance R3, resistance R5, resistance R8, resistance R12；Described triode group Q9 is the NPN type triode of two common B poles；Described three
Two E poles of pole pipe group connect described diode D1 and described diode D2 positive pole respectively；Two C of described triode group
Pole connects described resistance R26 and described resistance R27 respectively；Resistance described in described switching tube Q1 GS interpolar parallel connections
Resistance R8 described in R3, described switching tube Q4 GS interpolar parallel connections；Described resistance R5 is connected to described switching tube Q1 G
Pole；Described resistance R12 is connected to described switching tube Q4 G poles；Described resistance R5, resistance R12, resistance R27 are in parallel.
Further, the second described drive circuit also includes triode Q50, triode Q51；Described triode Q50
For NPN type, described triode Q51 is positive-negative-positive；Described second switch circuit also include resistance R1, resistance R4, resistance R9,
Resistance R10；The described triode Q50 of described resistance R94 connections and described triode Q51 B poles；Described triode
Q50 and the common E poles of described triode Q51；Described in described triode Q50 E poles are connected with described switching tube Q2 G interpolars
Resistance R4；Described triode Q51 E poles are connected described resistance R10 with described switching tube Q3 G interpolars；Described
Resistance R1 described in switching tube Q2 GS interpolar parallel connections；Resistance R9 described in described switching tube Q3 GS interpolar parallel connections.
Further, described switching tube Q1, described switching tube Q2, described switching tube Q3, described switching tube Q4
DS interpolars be parallel with voltage-regulator diode；Switching tube Q1, described switch described in the positive pole connection of described voltage-regulator diode
Pipe Q2, described switching tube Q3, described switching tube Q4 D poles；Switch described in the negative pole connection of described voltage-regulator diode
Pipe Q1, described switching tube Q2, described switching tube Q3, described switching tube Q4 S poles.
Off-network controller, including main control chip, sample circuit, power circuit, the protection circuit of off-network lithium battery reversal connection；Institute
The power circuit stated is used to provide electric power to described main control chip；Described power circuit is solar panels and the double confessions of lithium battery
Electricity；Described sample circuit is transmitted to described main control chip for gathering lithium battery side power supply signal；Described main control chip
For judging whether to send shutoff signal according to described lithium battery side power supply signal；Described shutoff signal control it is described from
The circuit connected between the described lithium battery of protection circuit cut-out of net lithium battery reversal connection and described off-network controller.
Further, described main control chip is 32 STM single-chip microcomputers, and described sample circuit includes resistance R75, resistance
R77, resistance R81, electric capacity C35, double diode D19；Described resistance R75 connection lithium batteries side；Described resistance R77 linkers
Quasi- voltage VCC；Described resistance R81 and described electric capacity C35 one end earth, the described resistance R75 of other end access and institute
The resistance R77 stated；Double diode D19 described in described resistance R77 is in parallel with described electric capacity C35 series shunt；Institute
It is sampling end between the resistance R77 and described electric capacity C35 that state；The described main control chip of described sampling end connection.
Further, described power circuit includes diode D7, diode D9, voltage-regulator diode D10, resistance R34, electricity
Hinder R35, resistance R40, resistance R44, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15, pressure regulation chip U3, three poles
Pipe Q13；Described triode Q13 is NPN type；The leading-out terminal of described diode D7 positive pole access solar panels；Described
Resistance R34 is connected with described resistance R35 is connected to described diode D7 negative pole；Described diode D9 positive pole access lithium
The leading-out terminal of battery；Described diode D9 negative pole is connected to described resistance R40 altogether with described resistance R35；Described electricity
Hold C11 one end ground connection in parallel with described electric capacity C13, another C for being connected to described resistance R40 and described triode Q13
Between pole；Described triode Q13 BC interpolars are parallel with described resistance R44；Described triode Q13 B poles and ground connection
Described voltage-regulator diode D10 is connected between end；The B of triode Q13 described in described voltage-regulator diode D10 negative pole access
Pole；The input VIN of pressure regulation chip U3 described in described triode Q13 E poles access, described pressure regulation chip U3 output
Hold the described main control chip of VOUT accesses；Described pressure regulation chip U3 earth terminal GND ground connection；Described electric capacity C14 with it is described
Electric capacity C15 be coupled between described output end VOUT and ground connection；Described electric capacity C12 is connected to described input
Between VIN and ground connection.
Further, in addition to master control reset circuit, master control filter circuit, master control programming circuitry；Described master control resets
Circuit includes resistance R73, electric capacity C32；Described resistance R73 connects with described electric capacity C32 to be connected on described main control chip
Reference voltage V is providedCCPin and ground connection between；Leading-out terminal between described resistance R73 and described electric capacity C32 is connected to
The reset pin of described main control chip；Described master control filter circuit includes electric capacity C33；Described electric capacity C33 series connection is connected to
Reference voltage V is provided on described main control chipCCPin and ground connection between；Described master control programming circuitry includes programming core
Piece；Described programming chip is connected with described main control chip；Described programming chip performs the burning to described main control chip
Write.
Compared with prior art, the beneficial effects of the present invention are：
The present invention provides the power-off protection method of off-network lithium battery reversal connection, state sampling, controller collection lithium battery side electricity
Position information；Condition adjudgement, judge whether lithium battery state is reversal connection state according to lithium battery side electrical potential information, if so, then sending
Shutoff signal is cut off and connects circuit between lithium battery and controller, is charged normal if it is not, then performing lithium battery.The invention further relates to from
The protection circuit of net lithium battery reversal connection, off-network controller.The present invention is using the lithium battery shape for being different from controller in the market
State sample mode, it is simple, efficient, the reversal connection state of lithium battery can be easily distinguished, even in the situation of access solar energy input
Under, reverse connection of accumulator is detected, can also be reacted rapidly, cuts off charge circuit, it is safe and reliable.The present invention is reasonable in design, and design is skilful
It is wonderful, solve off-network controller protection problem during lithium battery reversal connection, effectively improve the security of off-network solar energy system, avoid not
Necessary damage, while reduce off-grid system wiring difficulty.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
The embodiment of the present invention is shown in detail by following examples and its accompanying drawing.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the power-off protection method flow chart of the off-network lithium battery reversal connection of the present invention；
Fig. 2 is the power circuit diagram of the off-network controller for solar in one embodiment of the invention；
Fig. 3 is the sample circuit figure of the off-network controller for solar in one embodiment of the invention；
Fig. 4 is the main control chip, master control reset circuit, master control of the off-network controller for solar in one embodiment of the invention
The pin and circuit diagram of filter circuit, master control programming circuitry；
Fig. 5 is the protection circuit figure of the off-network lithium battery reversal connection in one embodiment of the invention.
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further, it is necessary to which explanation is, not
Under the premise of afoul, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
The power-off protection method of off-network lithium battery reversal connection, as shown in figure 1, comprising the following steps：
State samples, controller for solar collection lithium battery (or battery) side electrical potential information；Specifically, state is adopted
With sample circuit, in one embodiment, as shown in figure 3, sample circuit includes resistance R75, resistance R77, resistance R81, electric capacity
C35, double diode D19；Resistance R75 connection lithium batteries side；Resistance R77 connection reference voltage VsCC；Resistance R81 and electric capacity C35 mono-
Hold earth, other end access resistance R75 and resistance R77；Resistance R77 double two poles in parallel with electric capacity C35 series shunt
Pipe D19；It is sampling end E points between resistance R77 and electric capacity C35；Sampling end E points connect main control chip；Wherein reference voltage VCCWith electricity
Resistance R77 is used to raise circuit voltage, and using voltage superposition theorem, the sampled voltage of sampling end E points can all be superimposed with reference voltage
VCCValue, and with reference voltage VCCIt is worth and is sampled for normal voltage, wherein sample frequency is 8KHz-20KHz.As shown in figure 1,
Lithium battery reversal connection controller power-off protection, lithium battery side electrical potential information is specially gathered, is judged according to lithium battery side electrical potential information
Whether lithium battery state is reversal connection state, and circuit is connected if so, then cutting off between lithium battery and controller.In one embodiment, often
Disposable lithium-battery state sampling is carried out every 100us, in the case of access solar energy input, detects lithium battery reversal connection,
Also it can rapidly react, cut off charge circuit, it is safe and reliable.
Condition adjudgement, controller for solar judge whether lithium battery state is reversal connection shape according to lithium battery side electrical potential information
State, circuit is connected between shutoff signal cut-out lithium battery and controller if so, then sending, is charged normal if it is not, then performing lithium battery.
Wherein, as shown in figure 3, when lithium battery reversal connection, lithium battery leading-out terminal B points magnitude of voltage is negative value, is superimposed reference voltage VCCAfter value,
Sampling end E point magnitudes of voltage are almost nil, by the AD conversion of sampled voltage, judge that lithium battery is in reversal connection state, master control core
Piece U8 PA11 pins, PA9 pins sends break signal, as shown in figure 5, controlling switch pipe Q1, switching tube Q2, switching tube Q3,
Switching tube Q4 is all off, that is, cuts off charge circuit, and now off-network controller for solar is isolated with lithium battery, effectively prevents reversal connection
Lithium battery burns circuit in off-network controller for solar.It should be noted that during lithium battery normal work, lithium battery leading-out terminal B
Point is lithium battery normal work output voltage, voltage V on the basis of the sampled voltage of sampling end E pointsCCIt is defeated with lithium battery normal work
Corresponding normal operational voltage value when going out the common superposition of voltage, now, lithium battery normal work output voltage are on the occasion of that is,
Corresponding normal operational voltage value is significantly greater than reference voltage VCCCorresponding magnitude of voltage when being worth independent role, the AD of sampled voltage
Conversion, can be with significant difference lithium battery reversal connection state.
In one embodiment, as shown in figure 5, the protection circuit of off-network lithium battery reversal connection, including on-off circuit, driving
Circuit；Drive circuit driving switch connecting and disconnecting of the circuit；On-off circuit both ends connect solar panels leading-out terminal and lithium battery outlet respectively
End；Drive circuit accesses controller for solar main control chip control signal；Controller for solar main control chip sends shutoff signal,
Through drive circuit driving switch connecting and disconnecting of the circuit, so that it is determined that the circuit that controller for solar is connected with lithium battery.
Specifically, on-off circuit includes first switch circuit, second switch circuit；Drive circuit includes the first driving electricity
Road, the second drive circuit；Each circuit composition is discussed in detail separately below：
As shown in figure 5, first switch circuit includes switching tube Q1, switching tube Q4；Switching tube Q1, switching tube Q4 are parallel to too
Between positive energy plate leading-out terminal and second switch circuit；Switching tube Q1 is connected with switching tube Q4 S levels with solar panels leading-out terminal, is opened
Pipe Q1 is closed to be connected with second switch circuit with switching tube Q4 D levels；
Second switch circuit includes switching tube Q2, switching tube Q3；Switching tube Q2, switching tube Q3 are parallel to lithium battery leading-out terminal
Between first switch circuit；Switching tube Q2 is connected with switching tube Q3 S levels with lithium battery leading-out terminal, switching tube Q2 and switching tube
Q3 D levels are connected with first switch circuit；
First drive circuit drives first switch circuit；First drive circuit includes diode D1, diode D2, diode
D6, triode Q10, triode Q12, resistance R26, resistance R27, resistance R20, resistance R24, resistance R30, resistance R32, resistance
R33；Triode Q10 is positive-negative-positive, and triode Q12 is NPN type；Diode D1 access switching tubes in parallel with diode D2 negative pole
Q1 and switching tube Q4 both ends；Diode D1 positive pole is connected with resistance R26；Diode D2 positive pole and resistance R27；Resistance R26
With resistance R27 access triodes Q10 C poles；Triode Q10 BE interpolar parallel resistances R20；Triode Q10 B poles connection two
Pole pipe D6 positive pole；Diode D6 negative pole connection resistance R24；Resistance R24 is connected with triode Q12 C poles；Triode Q12
E poles and ground connection between be connected with resistance R33；Triode Q12 BE interpolars are parallel with resistance R32；Triode Q12 B poles and master
Control chip chamber is connected with resistance R30；
Second drive circuit drives second switch circuit；Second drive circuit includes diode D5, triode Q6, triode
Q11, resistance R94, resistance R17, resistance R22, resistance R25, resistance R28, resistance R31；Triode Q6 is positive-negative-positive, triode Q11
For NPN type；Resistance R94 is respectively connected to switching tube Q2 and switching tube Q3 G poles；R94 other ends access triode Q6 C poles；Three
Pole pipe Q6 BE interpolar parallel resistances R17；Triode Q6 B poles connection diode D5 positive pole；Diode D5 negative pole connection
Resistance R22；Resistance R22 is connected with triode Q11 C poles；Resistance R31 is connected between triode Q11 E poles and ground connection；Three poles
Pipe Q11 BE interpolars are parallel with resistance R28；Resistance R25 is connected between triode Q11 B poles and main control chip.
To provide stable circuit environment, the first drive circuit also includes triode group Q9；First switch circuit also includes
Resistance R3, resistance R5, resistance R8, resistance R12；Triode group Q9 is the NPN type triode of two common B poles；Two E poles of triode group
Diode D1 and diode D2 positive pole is connected respectively；Two C poles of triode group connect resistance R26 and resistance R27 respectively；Switch
Pipe Q1 GS interpolars parallel resistance R3, switching tube Q4 GS interpolar parallel resistances R8；Resistance R5 is connected to switching tube Q1 G poles；
Resistance R12 is connected to switching tube Q4 G poles；Resistance R5, resistance R12, resistance R27 are in parallel.
Corresponding, the second drive circuit also includes triode Q50, triode Q51；Triode Q50 is NPN type, triode
Q51 is positive-negative-positive；Second switch circuit also includes resistance R1, resistance R4, resistance R9, resistance R10；Resistance R94 connection triodes
Q50 and triode Q51 B poles；Triode Q50 and the common E poles of triode Q51；Triode Q50 E poles and switching tube Q2 G interpolars
Connect resistance R4；Triode Q51 E poles are connected resistance R10 with switching tube Q3 G interpolars；Switching tube Q2 GS interpolars electricity in parallel
Hinder R1；Switching tube Q3 GS interpolar parallel resistances R9.Now, as shown in figure 5, protection circuit after adjusted, F point current potentials at three
Twice of about A points, reach good and stable circuit characteristic.
To stablize each switch tube voltage, switching tube Q1, switching tube Q2, switching tube Q3, switching tube Q4 DS interpolars are parallel with
Voltage-regulator diode；The positive pole connecting valve pipe Q1 of voltage-regulator diode, switching tube Q2, switching tube Q3, switching tube Q4 D poles；Voltage stabilizing
The negative pole connecting valve pipe Q1 of diode, switching tube Q2, switching tube Q3, switching tube Q4 S poles.In actual applications, off-network lithium
The protection circuit of battery reversal connection is simultaneously lithium battery charging circuit, when lithium battery charges normal, switching tube Q1, switching tube Q2, is opened
Pass pipe Q3, switching tube Q4 instruct according to main control chip, adjust the voltage needed for lithium cell charging each stage, this is existing skill
Art, it will not be repeated here.
As shown in Fig. 5, Fig. 4, shutoff signal is sent by main control chip U8 PA11 pins, PA9 pins, and wherein PA11 draws
Pin accesses the H points of the first drive circuit, and PA9 pins access the I points of the second drive circuit, and first is driven by the first drive circuit
Switching tube Q1 and switching tube Q4 break-makes in on-off circuit, the switching tube in second switch circuit is driven by the second drive circuit
Q2 and switching tube Q3 break-makes.
Off-network controller, including main control chip, sample circuit, power circuit, the protection circuit of off-network lithium battery reversal connection；Electricity
Source circuit is used to provide electric power to main control chip；Power circuit is solar panels and lithium battery duplicate supply；Sample circuit is used to adopt
Collection lithium battery side power supply signal is transmitted to main control chip；Main control chip is used to judge whether to send according to lithium battery side power supply signal
Shutoff signal；Connect between lithium battery and off-network controller described in the protection circuit cut-out of shutoff signal control off-network lithium battery reversal connection
The circuit connect.Wherein, sample circuit, the protection circuit of off-network lithium battery reversal connection have been described in detail, therefore not repeated herein.Need
Bright, off-network controller is off-network controller for solar in one embodiment, and only it is in off-network solar power system
Using, it may also be used in other such as small winds, small-sized underground heat off-network electricity generation system.
In one embodiment, specifically, as shown in figure 4, main control chip is 32 STM single-chip microcomputers, off-network controller also wraps
Include master control reset circuit, master control filter circuit, master control programming circuitry；Master control reset circuit includes resistance R73, electric capacity C32；Resistance
R73 connects to be connected on main control chip with electric capacity C32 provides reference voltage VCCPin and ground connection between；Resistance R73 and electric capacity C32
Between leading-out terminal be connected to the reset pin of main control chip；Master control filter circuit includes electric capacity C33；Electric capacity C33 series connection is connected to
Reference voltage V is provided on main control chipCCPin and ground connection between；Master control programming circuitry includes programming chip；Programming chip with
Main control chip connects；Programming chip performs the programming to main control chip.
In one embodiment, as shown in Fig. 2 power circuit includes diode D7, diode D9, voltage-regulator diode D10, electricity
Hinder R34, resistance R35, resistance R40, resistance R44, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15, pressure regulation core
Piece U3, triode Q13；Triode Q13 is NPN type；The leading-out terminal of diode D7 positive pole access solar panels；Resistance R34 with
Resistance R35, which connects, is connected to diode D7 negative pole；The leading-out terminal of diode D9 positive pole access lithium battery；Diode D9 negative pole
Resistance R40 is connected to altogether with resistance R35；Electric capacity C11 one end ground connection in parallel with electric capacity C13 is another to be connected to resistance R40 and triode
Between Q13 C poles；Triode Q13 BC interpolars are parallel with resistance R44；Voltage stabilizing is connected between triode Q13 B poles and earth terminal
Diode D10；Voltage-regulator diode D10 negative pole access triode Q13 B poles；Triode Q13 E poles access pressure regulation chip U3
Input VIN, pressure regulation chip U3 output end VOUT access main control chip；Pressure regulation chip U3 earth terminal GND ground connection；Electric capacity
C14 and electric capacity C15 is coupled between output end VOUT and ground connection；Electric capacity C12 is connected between input VIN and ground connection.Its
In, diode D7, diode D9 are reverse-filling diode, and A is terminated into solar panels leading-out terminal, and B is terminated into lithium battery leading-out terminal,
Solar panels and lithium battery can all power to main control chip, and resistance R34, resistance R35 are in order to which supply voltage is based on lithium battery；
In one embodiment, C point output voltages 12V, VCCFor 3.3V.
The present invention provides the power-off protection method of off-network lithium battery reversal connection, state sampling, controller collection lithium battery side electricity
Position information；Condition adjudgement, judge whether lithium battery state is reversal connection state according to lithium battery side electrical potential information, if so, then sending
Shutoff signal is cut off and connects circuit between lithium battery and controller, is charged normal if it is not, then performing lithium battery.The invention further relates to from
The protection circuit of net lithium battery reversal connection, off-network controller.The present invention is using the lithium battery shape for being different from controller in the market
State sample mode, it is simple, efficient, the reversal connection state of lithium battery can be easily distinguished, even in the situation of access solar energy input
Under, reverse connection of accumulator is detected, can also be reacted rapidly, cuts off charge circuit, it is safe and reliable.The present invention is reasonable in design, and design is skilful
It is wonderful, solve off-network controller protection problem during lithium battery reversal connection, effectively improve the security of off-network solar energy system, avoid not
Necessary damage, while reduce off-grid system wiring difficulty.
More than, only presently preferred embodiments of the present invention, any formal limitation not is made to the present invention；All one's own professions
The those of ordinary skill of industry can swimmingly implement the present invention shown in by specification accompanying drawing and above；But all to be familiar with sheet special
The technical staff of industry without departing from the scope of the present invention, is made a little using disclosed above technology contents
The equivalent variations of variation, modification and evolution, it is the equivalent embodiment of the present invention；Meanwhile all substantial technologicals according to the present invention
Variation, modification and evolution of any equivalent variations made to above example etc., still fall within technical scheme
Within protection domain.
Claims (10)
1. the power-off protection method of off-network lithium battery reversal connection, it is characterised in that comprise the following steps：
State samples, controller collection lithium battery side electrical potential information；
Condition adjudgement, judge whether lithium battery state is reversal connection state according to lithium battery side electrical potential information, if so, then sending cut-out
Circuit is connected between signal cut lithium battery and controller, is charged normal if it is not, then performing lithium battery.
2. the protection circuit of off-network lithium battery reversal connection, it is characterised in that：Including on-off circuit, drive circuit；Described driving electricity
The described on-off circuit break-make of road driving；Described on-off circuit both ends connect solar panels leading-out terminal and lithium battery outlet respectively
End；Described drive circuit access controller for solar main control chip control signal；Controller for solar main control chip send as
Shutoff signal described in claim 1, described on-off circuit break-make is driven to cut off lithium battery and control through described drive circuit
The circuit connected between device processed.
3. the protection circuit of off-network lithium battery reversal connection as claimed in claim 2, it is characterised in that：Described on-off circuit includes
First switch circuit, second switch circuit；Described drive circuit includes the first drive circuit, the second drive circuit；
Described first switch circuit includes switching tube Q1, switching tube Q4；Described switching tube Q1, switching tube Q4 is parallel to the sun
Can be between plate leading-out terminal and described second switch circuit；Described switching tube Q1 and described switching tube Q4 S levels and the sun
The leading-out terminal connection of energy plate, described switching tube Q1 are connected with described switching tube Q4 D levels with described second switch circuit；
Described second switch circuit includes switching tube Q2, switching tube Q3；Described switching tube Q2, switching tube Q3 is parallel to lithium electricity
Between pond leading-out terminal and described first switch circuit；Described switching tube Q2 and described switching tube Q3 S levels and lithium battery
Leading-out terminal is connected, and described switching tube Q2 is connected with described switching tube Q3 D levels with described first switch circuit；
The described first switch circuit of described the first drive circuit driving；The first described drive circuit include diode D1,
Diode D2, diode D6, triode Q10, triode Q12, resistance R26, resistance R27, resistance R20, resistance R24, resistance
R30, resistance R32, resistance R33；Described triode Q10 is positive-negative-positive, and described triode Q12 is NPN type；Two described poles
The described switching tube Q1 of pipe D1 accesses in parallel with described diode D2 negative pole and described switching tube Q4 both ends；Described two
Pole pipe D1 positive pole is connected with described resistance R26；Described diode D2 positive pole and described resistance R27；Described electricity
Hinder the R26 triode Q10s described with described resistance R27 accesses C poles；Described in described triode Q10 BE interpolar parallel connections
Resistance R20；The positive pole of diode D6 described in described triode Q10 B poles connection；Described diode D6 negative pole connects
Meet described resistance R24；Described resistance R24 is connected with described triode Q12 C poles；Described triode Q12 E poles
Resistance R33 is connected between ground connection；Described triode Q12 BE interpolars are parallel with resistance R32；Described triode Q12 B
Resistance R30 is connected between pole and main control chip；
The described second switch circuit of described the second drive circuit driving；The second described drive circuit include diode D5,
Triode Q6, triode Q11, resistance R94, resistance R17, resistance R22, resistance R25, resistance R28, resistance R31；Three described poles
Pipe Q6 is positive-negative-positive, and described triode Q11 is NPN type；Described resistance R94 be respectively connected to described switching tube Q2 with it is described
Switching tube Q3 G poles；The described triode Q6 of described R94 other ends access C poles；Described triode Q6 BE interpolars
Resistance R17 described in parallel connection；The positive pole of diode D5 described in described triode Q6 B poles connection；Described diode D5
The described resistance R22 of negative pole connection；Described resistance R22 is connected with described triode Q11 C poles；Described triode
Resistance R31 is connected between Q11 E poles and ground connection；Described triode Q11 BE interpolars are parallel with resistance R28；Three described poles
Resistance R25 is connected between pipe Q11 B poles and main control chip.
4. the protection circuit of off-network lithium battery reversal connection as claimed in claim 3, it is characterised in that：The first described drive circuit
Also include triode group Q9；Described first switch circuit also includes resistance R3, resistance R5, resistance R8, resistance R12；Described
Triode group Q9 is the NPN type triode of two common B poles；Two E poles of described triode group connect described diode D1 respectively
With described diode D2 positive pole；Two C poles of described triode group connect described resistance R26 and described resistance respectively
R27；Electricity described in the GS interpolar parallel connections of resistance R3, described switching tube Q4 described in described switching tube Q1 GS interpolar parallel connections
Hinder R8；Described resistance R5 is connected to described switching tube Q1 G poles；Described resistance R12 is connected to described switching tube Q4
G poles；Described resistance R5, resistance R12, resistance R27 are in parallel.
5. the protection circuit of off-network lithium battery reversal connection as claimed in claim 3, it is characterised in that：The second described drive circuit
Also include triode Q50, triode Q51；Described triode Q50 is NPN type, and described triode Q51 is positive-negative-positive；It is described
Second switch circuit also include resistance R1, resistance R4, resistance R9, resistance R10；The described three-level of described resistance R94 connections
Pipe Q50 and described triode Q51 B poles；Described triode Q50 and the described common E poles of triode Q51；Described three-level
Pipe Q50 E poles are connected described resistance R4 with described switching tube Q2 G interpolars；Described triode Q51 E poles with it is described
Switching tube Q3 the described resistance R10 of G interpolars connection；Resistance R1 described in described switching tube Q2 GS interpolar parallel connections；Institute
Resistance R9 described in the switching tube Q3 stated GS interpolar parallel connections.
6. the protection circuit of off-network lithium battery reversal connection as claimed in claim 3, it is characterised in that：Described switching tube Q1, institute
Switching tube Q2, described switching tube Q3, the described switching tube Q4 DS interpolars stated are parallel with voltage-regulator diode；Described voltage stabilizing
The positive pole connection of diode described switching tube Q1, described switching tube Q2, described switching tube Q3, described switching tube Q4
D poles；Switching tube Q1, described switching tube Q2 described in the negative pole connection of described voltage-regulator diode, described switching tube Q3, institute
The switching tube Q4 stated S poles.
7. off-network controller, it is characterised in that：Including appointing in main control chip, sample circuit, power circuit, such as claim 2-6
The protection circuit of off-network lithium battery reversal connection described in one；Described power circuit is used to provide electric power to described main control chip；
Described power circuit is solar panels and lithium battery duplicate supply；Described sample circuit is used to gather lithium battery side power supply signal
Transmit to described main control chip；Described main control chip is used to judge whether to send according to described lithium battery side power supply signal
Shutoff signal；Lithium battery and institute described in the protection circuit cut-out of the described off-network lithium battery reversal connection of described shutoff signal control
The circuit connected between the off-network controller stated.
8. off-network controller as claimed in claim 7, it is characterised in that：Described main control chip is 32 STM single-chip microcomputers, institute
The sample circuit stated includes resistance R75, resistance R77, resistance R81, electric capacity C35, double diode D19；Described resistance R75 connections
Lithium battery side；Described resistance R77 connection reference voltage VsCC；Described resistance R81 and described electric capacity C35 one end simultaneously couple
Ground, other end access described resistance R75 and described resistance R77；Described resistance R77 connects with described electric capacity C35's
Double diode D19 in branch described in parallel connection；It is sampling end between described resistance R77 and described electric capacity C35；Described sampling
The described main control chip of end connection.
9. off-network controller as claimed in claim 7, it is characterised in that：Described power circuit includes diode D7, two poles
Pipe D9, voltage-regulator diode D10, resistance R34, resistance R35, resistance R40, resistance R44, electric capacity C11, electric capacity C12, electric capacity C13, electricity
Hold C14, electric capacity C15, pressure regulation chip U3, triode Q13；Described triode Q13 is NPN type；Described diode D7 is just
The leading-out terminal of solar panels is accessed in pole；Described resistance R34 is connected with described resistance R35 is connected to the negative of described diode D7
Pole；The leading-out terminal of described diode D9 positive pole access lithium battery；Described diode D9 negative pole and described resistance R35
Described resistance R40 is connected to altogether；Described electric capacity C11 one end in parallel with described electric capacity C13 ground connection, it is another be connected to it is described
Between resistance R40 and described triode Q13 C poles；Described triode Q13 BC interpolars are parallel with described resistance R44；
Described voltage-regulator diode D10 is connected between described triode Q13 B poles and earth terminal；Described voltage-regulator diode D10's is negative
The described triode Q13 of pole access B poles；The input of pressure regulation chip U3 described in described triode Q13 E poles access
Main control chip described in VIN, described pressure regulation chip U3 output end VOUT accesses；Described pressure regulation chip U3 earth terminal
GND is grounded；Described electric capacity C14 and described electric capacity C15 is coupled between described output end VOUT and ground connection；Described
Electric capacity C12 is connected between described input VIN and ground connection.
10. off-network controller as claimed in claim 7, it is characterised in that：Also include master control reset circuit, master control filtered electrical
Road, master control programming circuitry；Described master control reset circuit includes resistance R73, electric capacity C32；Described resistance R73 and described electricity
Appearance C32 series connection, which is connected on described main control chip, provides reference voltage VCCPin and ground connection between；Described resistance R73 and institute
Leading-out terminal between the electric capacity C32 stated is connected to the reset pin of described main control chip；Described master control filter circuit includes
Electric capacity C33；Described electric capacity C33 series connection, which is connected on described main control chip, provides reference voltage VCCPin and ground connection between；
Described master control programming circuitry includes programming chip；Described programming chip is connected with described main control chip；Described programming
Chip performs the programming to described main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671720.4A CN107482712B (en) | 2017-08-08 | 2017-08-08 | Power-off protection circuit and off-network controller of off-network lithium battery reverse connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710671720.4A CN107482712B (en) | 2017-08-08 | 2017-08-08 | Power-off protection circuit and off-network controller of off-network lithium battery reverse connection |
Publications (2)
| Publication Number | Publication Date |
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| CN107482712A true CN107482712A (en) | 2017-12-15 |
| CN107482712B CN107482712B (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710671720.4A Active CN107482712B (en) | 2017-08-08 | 2017-08-08 | Power-off protection circuit and off-network controller of off-network lithium battery reverse connection |
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| CN116388313A (en) * | 2022-12-21 | 2023-07-04 | 麦特科(深圳)科技有限公司 | Battery reverse connection prevention control method and device |
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|---|---|
| CN107482712B (en) | 2020-12-11 |
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