CN104882857B - A kind of electric type solar street light of lithium is to lithium battery safe charging protection circuit and method - Google Patents
A kind of electric type solar street light of lithium is to lithium battery safe charging protection circuit and method Download PDFInfo
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- CN104882857B CN104882857B CN201510339515.9A CN201510339515A CN104882857B CN 104882857 B CN104882857 B CN 104882857B CN 201510339515 A CN201510339515 A CN 201510339515A CN 104882857 B CN104882857 B CN 104882857B
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 117
- 230000004224 protection Effects 0.000 title claims abstract description 98
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- 230000003321 amplification Effects 0.000 claims abstract description 20
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 20
- 230000001012 protector Effects 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 9
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- 239000012774 insulation material Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 description 15
- 238000009413 insulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
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- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000027950 fever generation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910000648 terne Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses a kind of electric type solar street light of lithium to lithium battery safe charging protection circuit and method; including lithium battery group and photo-voltaic power supply; the charge circuit is serially connected with the first electronics charge switch, the second electronics charge switch and a temperature temperature-sensitive fuse between battery pack and photo-voltaic power supply, and fuse is provided with a resistive heater element；First class of protection circuit and safe secondary protection circuit are respectively arranged with circuit; the output of first class of protection circuit connects the first electronics charge switch; the output of safe secondary protection circuit connects the second electronics charge switch; the input two ends of one current amplification circuit are connected across the second electronics charge switch two ends; the output of current amplifier connects described resistive heater element one end, and the resistive heater element other end is connected between lithium battery group negative pole and temperature temperature-sensitive fuse.The present invention can realize lithium battery safe charging, prevent from causing lithium battery on fire because of overcharge.
Description
Technical field
The present invention relates to lithium battery solar street lamp, more particularly to a kind of electric type solar street light of lithium fills safely to lithium battery
Electric protection circuit and method.
Background technology
Solar street light is from lead-acid battery accumulation energy type progressively to the electric accumulation energy type transition of lithium.Lithium battery is necessary in application process
Battery is managed, particularly in the case of solar recharging, platform voltage when being typically chosen lithium cell charging is as filling
The reference voltage of electricity, so since, in actual charging process, the floating voltage of photovoltaic module is higher than lithium battery maximum voltage
More than 20%, if shielding failure and the continuation charging to lithium battery can not be turned off, lithium battery is inevitable on fire because of overcharging.
Electric bicycle is continued to use the guard method of the electric type solar street light of the lithium of in the market to li-ion cell protection method more, but sun energy circuit
Lamp is different to the condition of li-ion cell protection from electric bicycle, the power supply adaptor that electric bicycle is used to lithium cell charging,
Charging voltage is limited, its security has certain guarantee, and charging of the solar street light to lithium battery, in order to reduce
Loss is generally directly charged using photovoltaic module voltage, but when lithium battery is full of, due to the characteristic of photovoltaic module, photovoltaic module
Can be close to zero load, and the floating voltage of photovoltaic module is higher than more than the 20% of lithium battery maximum voltage, so high voltage is long-term
It is added in the reduction that lithium battery performance can be caused on lithium battery or even damages.
The content of the invention
It is an object of the invention to provide a kind of electric type solar street light of lithium to lithium battery safe charging protection circuit and side
Method, is situation and security of the voltage far above the maximum voltage of lithium battery group for photovoltaic module, a kind of lithium electricity of proposition
The circuit and method in pond, circuit use duplicate protection, the guard method of additional Thermal Cutoffs.Circuit is in situation about charging normal
Under will not trigger fuse, once first of shielding failure, the second pipe protection be triggering so that fuse wire, discharge and recharge is forever
Terminate long.
To achieve these goals, the technical scheme is that：
A kind of electric type solar street light of lithium to lithium battery safe charging protection circuit, including lithium battery group and photo-voltaic power supply,
Have between photo-voltaic power supply and lithium battery group in a charge circuit, charge circuit and be provided with charge protector, wherein, it is described to fill
Electrical circuit is serially connected with the first electronics charge switch and a temperature temperature-sensitive fuse between battery pack and photo-voltaic power supply, around guarantor
Dangerous silk is provided with a resistive heater element；First class of protection circuit and second class protection are respectively arranged with the charge protector
Circuit, first class of protection circuit is used for the charging one-level overvoltage protection to lithium battery, and the safe secondary protection circuit is used for lithium battery
Two grades of overvoltage protections of charging, the output of first class of protection circuit connects the first electronics charge switch, control the first electronics charging and opened
The Push And Release of pass, the output of safe secondary protection circuit connects a current amplification circuit, and the output connection of current amplification circuit is described
Resistive heater element one end, the resistive heater element other end is connected between lithium battery group electrode and temperature temperature-sensitive fuse.
A kind of electric type solar street light of lithium to lithium battery safe charging protection circuit, including lithium battery group and photo-voltaic power supply,
Have between photo-voltaic power supply and lithium battery group in a charge circuit, charge circuit and be provided with charge protector, wherein, it is described to fill
Electrical circuit is serially connected with the first electronics charge switch, the second electronics charge switch and a temperature between battery pack and photo-voltaic power supply
Temperature-sensitive fuse, a resistive heater element is provided with around fuse；One-level is respectively arranged with the charge protector
Protection circuit and safe secondary protection circuit, first class of protection circuit are used for the charging one-level overvoltage protection to lithium battery, two grades of guarantors
Protection circuit is used for two grades of overvoltage protections of lithium cell charging, the output of first class of protection circuit connect the first electronics charge switch,
The Push And Release of the first electronics charge switch is controlled, the output of safe secondary protection circuit connects the second electronics charge switch, control second
The Push And Release of electronics charge switch, the first electronics charge switch and the second electronics charge switch are serially connected, wherein, it is described
Second electronics charge switch is connected with the termination electrode of photo-voltaic power supply one, and the first electronics charge switch is connected by charge protector
The termination electrode of lithium battery group one is connect, another termination electrode of lithium battery group connects the photo-voltaic power supply other end by the temperature temperature-sensitive fuse
Electrode, the input two ends of a current amplification circuit are connected across the second electronics charge switch two ends, current amplification circuit
The described resistive heater element one end of output connection, the resistive heater element other end is connected to another termination electrode of lithium battery group and temperature
Between temperature-sensitive fuse.
Scheme is further：The temperature temperature-sensitive fuse is 80 DEG C to 250 DEG C temperature cut-off type fuses, the fusing
Type fuse is fixed in a dielectric housings, and housing is provided at both ends with binding post, and the resistive heater element is electricity
Silk is hindered, the resistance wire, which is wrapped in outside the surface of dielectric housings, resistance wire, electric insulation insulation material covering.
Scheme is further：The first class of protection circuit include microprocessor controller, charging current sample circuit and
Charging voltage sample circuit, the charging current sample circuit and charging voltage sample circuit are connected in charge circuit, charging
The output signal of current sampling circuit and charging voltage sample circuit is respectively connecting to the signal sampling input of microprocessor controller
Circuit end, the microprocessor controller connects provided with two output control terminals, a control end as the output of first class of protection circuit
The first electronics charge switch control end is connect, another control end connects Current amplifier electricity as the control end of current amplification circuit
Road.
Scheme is further：The first class of protection circuit and safe secondary protection circuit include a microprocessor controller, charging
Current sampling circuit and charging voltage sample circuit, the charging current sample circuit and charging voltage sample circuit are connected on and filled
In electrical circuit, the output signal of charging current sample circuit and charging voltage sample circuit is respectively connecting to microprocessor controller
Signal sampling input circuit end, the microprocessor controller is used as first class of protection provided with two output control terminals, a control end
The output of circuit connects the first electronics charge switch control end, another control end as safe secondary protection circuit output connection the
Two electronics charge switch control ends.
Scheme is further：Two grades of over-pressed overpressure values are more than the overpressure value of one-level overvoltage.
A kind of safe charging guard method based on the lithium cell charging safety protective circuit, the lithium battery fills safely
Electric protection circuit includes lithium battery group and photo-voltaic power supply, has a charge circuit between photo-voltaic power supply and lithium battery group, charges back
Charge protector is provided with road, the charge circuit is serially connected with the charging of the first electronics between battery pack and photo-voltaic power supply and opened
Close, the second electronics charge switch and a temperature temperature-sensitive fuse, surround or be close to fuse and be provided with a resistive heating member
Part；Charge protector also include a microprocessor controller and charging voltage sample circuit, charging voltage sample circuit it is defeated
Go out the signal sampling input circuit end that signal is connected to microprocessor controller, the microprocessor controller is provided with two output controls
End a, control end connects the first electronics charge switch control end as the output of first class of protection circuit, and another control end is made
The second electronics charge switch control end, the first electronics charge switch and the second electronics are connected for the output of safe secondary protection circuit
Charge switch is serially connected, wherein, the second electronics charge switch is connected with the termination electrode of photo-voltaic power supply one, first electronics
Charge switch connects the termination electrode of lithium battery group one by charge protector, and another termination electrode of lithium battery group passes through temperature heat
Quick fuse connects another termination electrode of photo-voltaic power supply, and the input two ends of a current amplification circuit are connected across second electronics and filled
Electric switch two ends, the output of current amplifier connects described resistive heater element one end, and the resistive heater element other end is connected to
Between another termination electrode of lithium battery group and temperature temperature-sensitive fuse；Charging voltage threshold value and guarantor are preserved in microprocessor controller
Protect charging voltage threshold value, the step of safe charging guard method includes normal charging step and protection lithium cell charging；
The normal charging step is：Surround the break-make of the first electronics charge switch all the time to lithium cell charging process
Realize, detailed process is：Judge whether the voltage at lithium battery two ends is higher by charging voltage threshold value, if above charging voltage threshold value
The first electronics charge switch is then disconnected, when the voltage at lithium battery two ends is less than charging voltage threshold value, first electricity is connected
Sub- charge switch；
The step of protection lithium cell charging：When the voltage at lithium battery two ends is higher by charging voltage threshold value and disconnects institute
When the order for stating the first electronics charge switch fails to make the first electronics charge switch disconnect, judge lithium battery two ends voltage whether
Protection charging voltage threshold value is higher by, if above the second electronics charge switch is then disconnected, now current amplification circuit is exported
One high current, by the temperature temperature-sensitive blown fuse, cuts off charge circuit to resistive heater element.
Scheme is further：The protection charging voltage threshold value is higher by charging voltage threshold value 10% to 20%.
Scheme is further：The temperature temperature-sensitive fuse is 80 DEG C to 250 DEG C temperature cut-off type fuses, the fusing
Type fuse is fixed in a dielectric housings, and housing is provided at both ends with binding post, and the resistive heater element is electricity
Silk is hindered, the resistance wire, which is wrapped in outside the surface of dielectric housings, resistance wire, electric insulation insulation material covering.
The beneficial effects of the invention are as follows：It is simple in construction, connection of the invention and protected mode, it is possible to achieve lithium battery safety
Charging, prevents from causing lithium battery on fire because of overcharge.The advantage of this circuit is also resided in, under normal circumstances, is not in temperature
The misoperation of fuse；Only after the first electronics charge switch failure and for short-circuit failure, while in photovoltaic charged feelings
It is only possible to trigger Thermal Cutoffs under condition.When namely two conditions are provided simultaneously with, fuse could be acted, this greatly reduce by
Maintenance cost produced by misoperation in fuse.
The present invention is described in detail with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is the circuit basic logic block diagram of the embodiment of the present invention 1；
Fig. 2 is the basic logic block diagram that the embodiment of the present invention 1 carries microcontroller circuit；
Fig. 3 is the circuit basic logic block diagram of the embodiment of the present invention 2；
Fig. 4 is the basic logic block diagram that the embodiment of the present invention 2 carries microcontroller circuit.
Embodiment
Embodiment 1：
A kind of electric type solar street light of lithium is to lithium battery safe charging protection circuit, as shown in figure 1, including lithium battery group 1
With photo-voltaic power supply 2, lithium battery group is street lamp power supply, road lamp power supply；There are a charge circuit 3, photo-voltaic power supply between photo-voltaic power supply and lithium battery group
Cell panel be arranged on light pole top, lithium battery group and charge circuit are arranged in a control box, are set in charge circuit
There is charge protector, wherein, the charge circuit is serially connected with the first electronics charge switch between battery pack and photo-voltaic power supply
301 and a temperature temperature-sensitive fuse 303, fuse is provided with a resistive heater element 304；The charge protection electricity
First class of protection circuit 305 and safe secondary protection circuit 306 are respectively arranged with road, first class of protection circuit is used for the charging to lithium battery
Excessively stream and one-level overvoltage protection, the safe secondary protection circuit are used for two grades of overvoltage protections to lithium cell charging, first class of protection electricity
The first electronics charge switch of output connection on road, the Push And Release for controlling the first electronics charge switch, the output of safe secondary protection circuit
A current amplification circuit 307 is connected, the output of current amplification circuit connects described resistive heater element one end, resistive heating member
The part other end is connected between lithium battery group electrode and temperature temperature-sensitive fuse.
In embodiment：As shown in Fig. 2 the first class of protection circuit includes a microprocessor controller 308（Certainly not only limit
In microcontroller circuit, other discrete circuits and integrated circuit are can also be, merely just a kind of preferred scheme）, charging current
Sample circuit 309 and charging voltage sample circuit 310, the charging current sample circuit and charging voltage sample circuit are connected on
In charge circuit, the output signal of charging current sample circuit and charging voltage sample circuit is respectively connecting to microprocessor controller
Signal sampling input circuit end, the microprocessor controller protects provided with two output control terminals, a control end as one-level
The output of protection circuit connects the first electronics charge switch control end, and another control end connects as the control end of current amplification circuit
Current amplification circuit is connect, current amplification circuit is a kind of known circuit, is to connect the mode of input signal High-current output
Connect resistive heater element.
Embodiment 2：
A kind of electric type solar street light of lithium is to lithium battery safe charging protection circuit, as shown in Figure 3：Including lithium battery group 1
With photo-voltaic power supply 2, lithium battery group is street lamp power supply, road lamp power supply；There are a charge circuit 3, photo-voltaic power supply between photo-voltaic power supply and lithium battery group
Cell panel be arranged on light pole top, lithium battery group and charge circuit are arranged in a control box, are set in charge circuit
There is charge protector, wherein, the charge circuit is serially connected with the first electronics charge switch between battery pack and photo-voltaic power supply
301st, the second electronics charge switch 302 and a temperature temperature-sensitive fuse 303, a resistive heating member is provided with around fuse
Part 304；First class of protection circuit 305 and safe secondary protection circuit 306, first class of protection electricity are respectively arranged with the charge protector
Road is used for charging excessively stream and one-level overvoltage protection to lithium battery, and the safe secondary protection circuit is used for two grades to lithium cell charging
Overvoltage protection, the first electronics charge switch of output connection of first class of protection circuit, the Push And Release for controlling the first electronics charge switch,
The second electronics charge switch of output connection of safe secondary protection circuit, the Push And Release for controlling the second electronics charge switch, described first
Electronics charge switch and the second electronics charge switch are serially connected, wherein, the second electronics charge switch and photo-voltaic power supply one
Termination electrode（Negative pole）Connection, the first electronics charge switch connects the termination electrode of lithium battery group one by charge protector（It is negative
Pole）, lithium battery group negative pole pass through the temperature temperature-sensitive fuse connect another termination electrode of photo-voltaic power supply（Positive pole）, an electric current puts
The input two ends of big circuit 307 are connected across the second electronics charge switch two ends, and the output connection of current amplification circuit is described
Resistive heater element one end, the resistive heater element other end is connected to another termination electrode of lithium battery group（Positive pole）Protected with temperature temperature-sensitive
Between dangerous silk.
Second class protection is taken in charging process to lithium battery in embodiment.First order protection is GPF (General Protection False, and it is wrapped
Include overvoltage, cross put, equilibrium etc..Second level protection is mainly overvoltage protection, and overpressure value protects set higher than the first order
Overpressure value.In embodiment：The temperature temperature-sensitive fuse is 80 DEG C to 250 DEG C temperature cut-off type fuses, such as terne metal
Or the combination of the other alloys of low melting point, can directly it purchase from the market, the fusing type fuse is fixed on an electricity
In insulation shell（Such as mica sheet or glass cloth housing）, housing is provided at both ends with binding post, and the resistive heater element is
Resistance wire, the resistance wire, which is wrapped in outside the surface of dielectric housings, resistance wire, electric insulation insulation material covering（Such as glass
Glass cloth）Fixed with adhering with epoxy resin., can be actively molten by the fuse in dielectric housings when being driven to resistance wire electric current
It is disconnected.Second pole protection once trigger, it can active fuse wire, so as to forever stop the charging and then protection to lithium battery
Lithium battery.
In embodiment：As shown in figure 4, the first class of protection circuit and safe secondary protection circuit are real in microprocessor controller
It is existing, therefore first class of protection circuit and safe secondary protection circuit include a microprocessor controller 308（It is of course not solely limited to microprocessor
Circuit, can also be other discrete circuits and integrated circuit, merely just a kind of preferred scheme）, charging current sample circuit 309
With charging voltage sample circuit 310, the charging current sample circuit and charging voltage sample circuit are connected in charge circuit,
The output signal of charging current sample circuit and charging voltage sample circuit is respectively connecting to the signal sampling of microprocessor controller
Input circuit end, the microprocessor controller is used as the defeated of first class of protection circuit provided with two output control terminals, a control end
Go out the first electronics charge switch control end of connection, another control end connects the second electronics as the output of safe secondary protection circuit and filled
Electric switch control end.
In embodiment：Two grades of over-pressed overpressure values are more than the overpressure value of one-level overvoltage.
Above-described embodiment is when lithium battery voltage exceedes the first order and protects set thresholding, and the first electronics charge switch breaks
Open, charging stops.This action can be performed constantly under normal circumstances, but now voltage and the thresholding electricity of not up to two poles protection
Press, therefore the second electronics charge switch is closed always, that is to say, that the voltage difference at current amplification circuit input two ends is zero,
No current is exported, and resistive heater element will not be heated, and temperature temperature-sensitive fuse will not be heated fusing.
But after voltage exceedes the threshold voltage that the first order is protected, if the first electronics charge switch fails, lithium battery
Charging can be continued, the voltage of lithium battery may proceed to rise, until the threshold voltage protected more than the second pole, now, the second electricity
Sub- charge switch is disconnected, and the first electronics charge switch is still closed, and current amplification circuit input has pressure drop, amplified, to resistance
Heat pyrexia element is heated, so that temperature temperature-sensitive blown fuse.After temperature temperature-sensitive blown fuse, heating circuit disconnects, together
When charging and discharging circuit also forever disconnect, lithium battery group is protected, it is to avoid danger occur.
80 DEG C to 250 DEG C temperature cut-off type fuse another effect are exactly in embodiment, when extraneous short circuit or electric current
During abnormal increase, Thermal Cutoffs can also fuse and protection circuit.Temperature cut-off type fuse and adding thermal resistance, can also make
Replaced with the existing active fusing type fuse with this function.
The advantage of this circuit is also resided in, under normal circumstances, is not in the misoperation of Thermal Cutoffs；Only in the first electricity
Sub- charge switch fails and for after short-circuit failure, while being only possible to trigger Thermal Cutoffs in the case of photovoltaic charged.
When exactly two conditions are provided simultaneously with, fuse could be acted, and this is greatly reduced due to the dimension produced by the misoperation of fuse
Protect cost.
Embodiment 3：
A kind of safe charging guard method based on lithium cell charging safety protective circuit described in embodiment 1 or 2, wherein in fact
The content for applying example 1 or 2 also should be used as the content of the present embodiment.Wherein：In the method, the lithium battery safe charging protection electricity
Road includes lithium battery group and photo-voltaic power supply, has between photo-voltaic power supply and lithium battery group in a charge circuit, charge circuit and sets
There is charge protector, the charge circuit is serially connected with the first electronics charge switch, second between battery pack and photo-voltaic power supply
Electronics charge switch and a temperature temperature-sensitive fuse, surround or are close to fuse and be provided with a resistive heater element；Charging
Protection circuit also includes a microprocessor controller and charging voltage sample circuit, and the output signal of charging voltage sample circuit connects
The signal sampling input circuit end of microprocessor controller is connected to, the microprocessor controller is provided with two output control terminals, one
Control end connects the first electronics charge switch control end as the output of first class of protection circuit, and another control end is used as two grades of guarantors
The output of protection circuit connects the second electronics charge switch control end, the first electronics charge switch and the second electronics charge switch
It is serially connected, wherein, the second electronics charge switch is connected with the termination electrode of photo-voltaic power supply one, the first electronics charge switch
The termination electrode of lithium battery group one is connected by charge protector, another termination electrode of lithium battery group passes through the temperature temperature-sensitive fuse
Another termination electrode of photo-voltaic power supply is connected, the input two ends of a current amplification circuit are connected across the second electronics charge switch two
End, the output of current amplifier connects described resistive heater element one end, and the resistive heater element other end is connected to lithium battery group
Between negative pole and temperature temperature-sensitive fuse；Charging voltage threshold value and protection charging voltage threshold are preserved in microprocessor controller
Value, the step of safe charging guard method includes normal charging step and protection lithium cell charging；
The normal charging step is：Surround the break-make of the first electronics charge switch all the time to lithium cell charging process
Realize, detailed process is：Judge whether the voltage at lithium battery two ends is higher by charging voltage threshold value, if above charging voltage threshold value
The first electronics charge switch is then disconnected, when the voltage at lithium battery two ends is less than charging voltage threshold value, first electricity is connected
Sub- charge switch；
The step of protection lithium cell charging：When the voltage at lithium battery two ends is higher by charging voltage threshold value and disconnects institute
When the order for stating the first electronics charge switch fails to make the first electronics charge switch disconnect, judge lithium battery two ends voltage whether
Protection charging voltage threshold value is higher by, if above the second electronics charge switch is then disconnected, now current amplification circuit is exported
One high current, by the temperature temperature-sensitive blown fuse, cuts off charge circuit to resistive heater element.
In above-described embodiment：The protection charging voltage threshold value is higher by charging voltage threshold value 10% to 20%.
In embodiment：The temperature temperature-sensitive fuse is 80 DEG C to 250 DEG C temperature cut-off type fuses, and the fusing type is protected
Dangerous silk is fixed in a dielectric housings, and housing is provided at both ends with binding post, and the resistive heater element is resistance wire,
The resistance wire, which is wrapped in outside the surface of dielectric housings, resistance wire, electric insulation insulation material covering.
Claims (3)
1. a kind of safe charging guard method based on lithium battery safe charging protection circuit, the lithium battery safe charging protection
Circuit includes lithium battery group and photo-voltaic power supply, has between photo-voltaic power supply and lithium battery group in a charge circuit, charge circuit and sets
Charge protector is equipped with, the charge circuit is serially connected with the first electronics charge switch, between battery pack and photo-voltaic power supply
Two electronics charge switch and a temperature temperature-sensitive fuse, surround or are close to fuse and be provided with a resistive heater element；Fill
Electric protection circuit also includes a microprocessor controller and charging voltage sample circuit, the output signal of charging voltage sample circuit
The signal sampling input circuit end of microprocessor controller is connected to, the microprocessor controller is provided with two output control terminals, one
Individual control end connects the first electronics charge switch control end as the output of first class of protection circuit, and another control end is used as two grades
The output of protection circuit connects the second electronics charge switch control end, and the first electronics charge switch and the second electronics charging is opened
Pass is serially connected, wherein, the second electronics charge switch is connected with the termination electrode of photo-voltaic power supply one, and the first electronics charging is opened
Close and the termination electrode of lithium battery group one is connected by charge protector, another termination electrode of lithium battery group is insured by the temperature temperature-sensitive
Silk connection another termination electrode of photo-voltaic power supply, the input two ends of a current amplification circuit are connected across the second electronics charge switch
Two ends, the output of current amplifier connects described resistive heater element one end, and the resistive heater element other end is connected to lithium battery
Between another termination electrode of group and temperature temperature-sensitive fuse；Charging voltage threshold value is preserved in microprocessor controller and protection is charged
Voltage threshold, it is characterised in that the safe charging guard method includes the step of normal charging step and protection lithium cell charging
Suddenly；
The normal charging step is：Break-make to lithium cell charging process all the time around the first electronics charge switch is real
Existing, detailed process is：Judge whether the voltage at lithium battery two ends is higher by charging voltage threshold value, if above charging voltage threshold value then
The first electronics charge switch is disconnected, when the voltage at lithium battery two ends is less than charging voltage threshold value, first electronics is connected
Charge switch；
The step of protection lithium cell charging：When the voltage at lithium battery two ends is higher by charging voltage threshold value and disconnects described the
When the order of one electronics charge switch fails to make the disconnection of the first electronics charge switch, judge whether the voltage at lithium battery two ends is higher by
Charging voltage threshold value is protected, if above the second electronics charge switch is then disconnected, now current amplification circuit exports one
High current, by the temperature temperature-sensitive blown fuse, cuts off charge circuit to resistive heater element.
2. according to the method described in claim 1, it is characterised in that the protection charging voltage threshold value is higher by charging voltage threshold value
10% to 20%.
3. according to the method described in claim 1, it is characterised in that the temperature temperature-sensitive fuse is 80 DEG C to 250 DEG C temperature
Fusing type fuse, the fusing type fuse is fixed in a dielectric housings, and housing is provided at both ends with binding post,
The resistive heater element is resistance wire, and the resistance wire, which is wrapped in outside the surface of dielectric housings, resistance wire, electric exhausted
Edge insulation material is covered.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339515.9A CN104882857B (en) | 2015-06-18 | 2015-06-18 | A kind of electric type solar street light of lithium is to lithium battery safe charging protection circuit and method |
| CN201520422686.3U CN204681081U (en) | 2015-06-18 | 2015-06-18 | A kind of lithium electricity type solar street light is to lithium battery safe charging protective circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510339515.9A CN104882857B (en) | 2015-06-18 | 2015-06-18 | A kind of electric type solar street light of lithium is to lithium battery safe charging protection circuit and method |
| CN201520422686.3U CN204681081U (en) | 2015-06-18 | 2015-06-18 | A kind of lithium electricity type solar street light is to lithium battery safe charging protective circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104882857A CN104882857A (en) | 2015-09-02 |
| CN104882857B true CN104882857B (en) | 2017-11-03 |
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| CN201520422686.3U Expired - Fee Related CN204681081U (en) | 2015-06-18 | 2015-06-18 | A kind of lithium electricity type solar street light is to lithium battery safe charging protective circuit |
| CN201510339515.9A Active CN104882857B (en) | 2015-06-18 | 2015-06-18 | A kind of electric type solar street light of lithium is to lithium battery safe charging protection circuit and method |
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|---|---|---|---|---|
| CN204681081U (en) * | 2015-06-18 | 2015-09-30 | 安徽朗越环境工程有限公司 | A kind of lithium electricity type solar street light is to lithium battery safe charging protective circuit |
| CN107222014B (en) * | 2017-07-21 | 2024-02-02 | 东莞市钜大电子有限公司 | Solar charging circuit of lithium battery |
| CN108233520A (en) * | 2018-02-09 | 2018-06-29 | 深圳市普兰德储能技术有限公司 | A kind of photovoltaic generation electric storage device |
| CN110994561B (en) * | 2019-04-30 | 2021-10-08 | 宁德时代新能源科技股份有限公司 | Battery safety protection system and processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4890247B2 (en) * | 2006-03-27 | 2012-03-07 | 三菱電機株式会社 | Grid-connected inverter device |
| CN101478169A (en) * | 2008-01-03 | 2009-07-08 | 加百裕工业股份有限公司 | Lithium battery pre-alarm protection apparatus and method thereof |
| CN202142843U (en) * | 2011-07-12 | 2012-02-08 | 广州明美电子有限公司 | Metering and protecting circuit of double-section battery |
| CN202374004U (en) * | 2011-12-20 | 2012-08-08 | 西安鸿雅达电子有限公司 | Solar power supply controller |
| KR101440888B1 (en) * | 2011-12-27 | 2014-09-17 | 삼성에스디아이 주식회사 | Battery protection circuit |
| CN103515937B (en) * | 2013-10-22 | 2017-03-15 | 深圳众鑫凯科技有限公司 | Battery protecting circuit with secondary overvoltage and under-voltage protection function |
| CN104362594A (en) * | 2014-10-31 | 2015-02-18 | 成都闰世科技有限公司 | Secondary overvoltage protection circuit for lithium battery protection boards |
| CN204681081U (en) * | 2015-06-18 | 2015-09-30 | 安徽朗越环境工程有限公司 | A kind of lithium electricity type solar street light is to lithium battery safe charging protective circuit |
-
2015
- 2015-06-18 CN CN201520422686.3U patent/CN204681081U/en not_active Expired - Fee Related
- 2015-06-18 CN CN201510339515.9A patent/CN104882857B/en active Active
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| CN204681081U (en) | 2015-09-30 |
| CN104882857A (en) | 2015-09-02 |
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