CN103078300A - Mine intrinsic safety lithium battery power supply system - Google Patents
Mine intrinsic safety lithium battery power supply system Download PDFInfo
- Publication number
- CN103078300A CN103078300A CN2012105877519A CN201210587751A CN103078300A CN 103078300 A CN103078300 A CN 103078300A CN 2012105877519 A CN2012105877519 A CN 2012105877519A CN 201210587751 A CN201210587751 A CN 201210587751A CN 103078300 A CN103078300 A CN 103078300A
- Authority
- CN
- China
- Prior art keywords
- lithium battery
- voltage
- power supply
- protection
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 67
- 239000004065 semiconductor Substances 0.000 claims description 24
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 9
- 239000003245 coal Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 7
- 102220475869 Keratin, type I cytoskeletal 10_R12A_mutation Human genes 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 230000001052 transient effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 3
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Landscapes
- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a mine intrinsic safety lithium battery power supply system and aims to solve the problem that a power supply in the prior art cannot provide stable power for equipment in a long distance. The mine intrinsic safety lithium battery power supply system comprises a lithium battery and protection module, a boost module and a secondary protection circuit module, wherein the lithium battery and protection module consists of a lithium battery and a charge-discharge protection module, and is used for protecting the lithium battery from over-charge and over-discharge and cutting off the power supply of the lithium battery when the temperature of the lithium battery exceeds a danger temperature; the boost module is used for converting the voltage of the lithium battery into 12V required by a load from 3.7V and outputting the voltage to the secondary protection circuit module; and the secondary protection circuit module consists of two identical parts, and each part comprises output over-voltage protection and output over-current protection. According to the mine intrinsic safety lithium battery power supply system, a new secondary protection circuit is adopted, an over-current protection resistor is arranged at the cathode end of a power supply product, the voltage acquired from the over-current protection resistor is amplified, the amplified voltage of the over-current protection resistor is compared with a benchmark, as the smaller over-current protection resistor is adopted, the over-current protection resistor is commonly a milli-ohm resistor, the voltage drop of the resistor in the circuit is small, so that a longer conducting wire can be used between a power supply end and an equipment end.
Description
Technical field
The present invention relates to a kind of electric power system, particularly a kind of mine intrinsic safety lithium battery power supply system for coal industry.
Background technology
Safe secondary protection circuit in the past; overcurrent protection resistance is the positive terminal at circuit; can produce larger voltage drop behind the current flowing resistance; be 0.5 Europe such as overcurrent protection resistance; flow through the electric current of 1A; the pressure drop that produces is 0.5V; need to flow through 2 such resistance through second class protection; so whole pressure drop is 1V; the power supply of 12V has arrived output and has become 11V; add the voltage loss on the wire, arrived the product use side just for about 10.6V, power supply can't provide stable electric power for the long equipment of distance.
Contain multiple inflammable, explosive dangerous gas (such as methane, CO etc.) under the coal mine, need to adopt in real time probe monitors, guarantee downhole safety to take measures.The downhole monitoring substation is being born the vital task that the monitoring probe signal is processed, circuit is controlled, and mainly adopts uninterrupted stand-by power supply that the downhole monitoring substation is realized in real time power supply.Wherein battery pack is one of assembly of core the most in uninterrupted power supply (UPS) system, what, discharging current characteristic, high cryogenic discharging characteristic and useful life of the weight of battery and volume, discharge capacity, directly have influence on weight, volume, discharge time and the reliability of uninterrupted power supply (UPS).As the intrinsic safety place of high safety grade, require output voltage, electric current to realize second class protection under the coal mine, cause the coal mine downhole safety incidents in order to avoid cause external spark.
At present, the uninterrupted power supply that can be used for the power supply of coal mine underground monitoring substation on the market all is to be realized by " maintenance-free lead accumulator ", existing lead acid accumulator exists obviously not enough: 1. when the above current discharge of 3 multiplying powers, can only emit below 30% of battery capacity, and when charging, its charging current must be controlled at more than 0.25 multiplying power, after discharging fully, its charging interval need to just can be charged to 80% of battery capacity at 8 hours, and the shortcoming that cycle performance of battery is poor, charging time is short is outstanding; 2. lead acid accumulator is in life cycle, and capacity descends year by year, and its dynamic change is difficult to guarantee the second class protection of output voltage, electric current, has seriously restricted the index of uninterrupted power supply under the coal mine; 3. the cycle life of lead acid storage battery tank discharge is about 300 times, and discharge capacity is poorer under low temperature environment, and the colliery down-hole ambient temperature is near 0 degree, and lead acid accumulator is unwell to the colliery down-hole application; 4. the primary raw material of lead acid accumulator is " lead ", and it uses and " lead " discharging directly has influence on groundwater environment; 5. there is the liberation of hydrogen side reaction in lead acid accumulator in charging process, and hydrogen has a strong impact on coal mine downhole safety as high risk gas.
At present, most downhole monitoring substation uninterrupted power supplys only can be kept downhole monitoring substation work 2 hours.Along with the continuous lengthening of the continuous intensification of the pit mining degree of depth, digging face, far can not satisfy down-hole practical application needs in 2 hours.Because the lead-acid battery group does not have internal discharge, charging controlling mechanism; its discharge output voltage and electric current are difficult to be in and keep stablizing; be difficult to realize the second class protection output of output current, voltage, thereby significantly impact the many indexs such as reliability, fail safe, practicality of product under the coal mine.
Summary of the invention
Power supply can't be for providing the problem of stable power in the prior art apart from long equipment in order to solve; the present invention adopts new safe secondary protection circuit; overcurrent protection resistance is placed on the negative pole end of power supply product; first the voltage that gathers on the overcurrent protection resistance is amplified; if do not adopt the circuit enlarging function; the ohmically magnitude of voltage of overcurrent protection is very low; can't compare with reference voltage; and small voltage is subject to the interference of outside noise signal easily; cause the protective circuit misoperation; overcurrent protection resistance voltage and benchmark after the amplification compare; because adopt less overcurrent protection resistance; overcurrent protection resistance generally is the resistance of milliohm level, so the voltage drop of resistance is just little on the circuit, the wire from the power end to the equipment end just can use long wire like this.
The present invention proposes a kind of mine intrinsic safety lithium battery power supply system, described mine intrinsic safety lithium battery power supply system comprises: lithium battery and protection module thereof, formed by lithium battery and charge and discharge protecting module, for the protection of lithium battery overshoot electricity, the overdischarge of protection lithium battery, and when the temperature of lithium battery surpasses dangerous temperature, lithium battery is cut off the power supply; Boost module, the 3.7V voltage transitions that is used for lithium battery is the required 12V voltage of load, and outputs to the second class protection line module; The second class protection line module is comprised of two identical parts, and every part comprises output over-voltage protection and output overcurrent protection.
According to an aspect of the present invention; in lithium battery and protection module thereof, by the closing and opening of transistor switch, realize lithium battery overcharge, when overdischarge and excess Temperature; to lithium battery outage, thus prevent lithium battery overshoot, cross and put and surpass dangerous temperature.
According to an aspect of the present invention, booster circuit uses the MAX1771 chip as main control chip, can be the chip of 12V voltage with low voltage transition directly, and 2 metal-oxide-semiconductors of chip drives produce the voltage of 12V.
According to an aspect of the present invention; adopt new safe secondary protection circuit; overcurrent protection resistance is placed on the negative pole end of power supply product; first the voltage that gathers on the overcurrent protection resistance is amplified; overcurrent protection resistance voltage and reference voltage after the amplification compare, thereby so that power end can use long wire to the wire of equipment end.
Mine intrinsic safety lithium battery power supply system among the present invention can be used in the system of mine vehicle system and other specific area, has broad prospects.
Description of drawings
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is the mine intrinsic safety lithium battery power supply system block diagram according to the embodiment of the invention.
Fig. 2 is the boost module circuit diagram according to the embodiment of the invention.
Fig. 3 is the second class protection line module circuit diagram according to the embodiment of the invention.
Fig. 4 is according to the lithium battery of the embodiment of the invention and protection module thereof.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
According to a preferred embodiment of the invention; power acquisition is with new safe secondary protection circuit; overcurrent protection resistance is placed on the negative pole end of power supply product; first the voltage that gathers on the overcurrent protection resistance is amplified; if do not adopt the circuit enlarging function; the ohmically magnitude of voltage of overcurrent protection is very low; can't compare with reference voltage; and small voltage is subject to the interference of outside noise signal easily; cause the protective circuit misoperation; overcurrent protection resistance voltage and benchmark after the amplification compare; because adopt less overcurrent protection resistance; overcurrent protection resistance generally is the resistance of milliohm level, so the voltage drop of resistance is just little on the circuit, the wire from the power end to the equipment end just can use long wire like this.
According to a preferred embodiment of the present invention, mine intrinsic safety lithium battery power supply system is comprised of three parts: lithium battery and protection module thereof, boost module, second class protection line module.Concrete block diagram is referring to accompanying drawing 1.
Lithium battery and protection module thereof are comprised of lithium battery and charge and discharge protecting module.
The 3.7V voltage transitions that boost module is used for lithium battery is the required 12V voltage source of load;
The second class protection line module is comprised of two identical parts, and every part comprises output over-voltage protection and output overcurrent protection.
This power supply be by 1 the joint 3.7V chargeable lithium cell through booster circuit be 12V voltage with the 3.7V boost in voltage, again through the two poles of the earth baffle circuit, powering load.The J1 of Fig. 2 connects the 3.7V output voltage of lithium battery, the J1 of J2 connection layout 3, and for it provides the 12V supply voltage, the J2 connection device load of Fig. 3.
Fig. 4 is the theory diagram of lithium battery and protection module thereof, by lithium battery and protection module thereof lithium battery is realized control.The lithium battery positive and negative electrode links to each other with circuit anode, negative pole respectively; Can adopt dsp chip or single-chip microcomputer as the control unit of lithium battery and protection module thereof, with realize to discharging and recharging of battery control and to the data of monitoring compare, Real-time Feedback.Described lithium battery and protection module thereof comprise controller, transistor switch, equalizing circuit, balanced load and Temperature Detector; described controller is realized the balance of voltage of battery is managed by equalizing circuit and balanced load; realize temperature monitoring to battery pack by Temperature Detector, and according to the signal of monitoring transistor switch is realized the switch management.Equalizing circuit obtains the current potential of battery, is uploaded to controller; Temperature Detector obtains the temperature signal of lithium battery, is uploaded to controller; Described controller can take following mode to process: 1. to crossing the battery of high potential, open the sub-road of equalizing circuit, realize being connected in series of the sub-road of equalizing circuit and internal load, this battery discharge to reduce its current potential, is realized the potential balance to battery; 2. when having the external circuit current potential, when lithium battery is full of, open transistor switch, with isolated charging, when the lithium battery underfill, close transistor switch, dynamically charge to keep battery; 3. when not having the external circuit current potential, transistor switch realizes cutting out, make lithium battery to outside circuit discharging, when arriving lithium battery group cut-off discharge potential, transistor switch is realized opening, to protect no longer deep discharge of integral battery door; 4. when battery temperature surpasses definite value, transistor switch is realized turn-offing processing, to prevent the further rising of battery temperature.By above-mentioned four kinds of control strategies, realize that battery balanced, charging, discharge and the temperature control to lithium battery is processed, promote the high-security applications of battery.
If the voltage in single-lithium-battery pond is 3.7V, its maximum charging voltage allows to 4.2V.The overcharged voltage that then single battery can be set is at 3.8～4.2V, and controller can be realized outage by transistor switch in 10ms, to prevent overcharging of battery pack.
If the temperature in single-lithium-battery pond allows to 120 degree; safe temperature is 60 degree, and then establishing battery temperature protection point is 60 degree, when Temperature Detector monitoring single battery temperature reaches 60 when spending; controller is realized outage by transistor switch in 10ms, to prevent the temperature rise of battery.
Put for preventing that battery from crossing, arranged and bleed off pressure protection voltage, the minimum permission voltage of establishing single battery is 2.0V; the minimum permission voltage of then establishing battery is 2.0V; when single battery reached 2.0V, controller was realized outage by metal-oxide-semiconductor in 10ms, put with the mistake that prevents battery pack.
Boost module is converted to 12V with cell voltage, transfers high voltage to by low-voltage.
Booster circuit uses the MAX1771 chip as main control chip, this chip is not need to dispose any Parameters of The Parts on every side, can be the chip of 12V voltage with low voltage transition directly, 2 metal-oxide-semiconductors of chip drives produce the voltage of 12V, because during chip drives MOS, because metal-oxide-semiconductor is on off state, metal-oxide-semiconductor open with turn off process in have the stack of voltage and current, cause the metal-oxide-semiconductor heating, so adopt the mode of 2 metal-oxide-semiconductor parallel connections to drive, can increase so the heat-resisting degree of metal-oxide-semiconductor, thereby can omit fin, reduce the vertical height of product.
Physical circuit figure is referring to shown in Figure 2.The 3.7V voltage input J1 port of lithium battery, one end of J1 port at first connects the end of fuse F1, the other end of F1 connects the end of thermistor RT, the other end of RT connects an end of inductance L 1, and the end of capacitor C 1, C2, C3, the other end of capacitor C 1, C2, C3 connects the other end of J1, and ground connection; The other end of L1 connects the positive pole of diode D1, and the negative pole of D1 connects an end of J2 port; The negative pole of D1 connects an end of capacitor C 6, C7, C8 and resistance R 3 simultaneously, and the other end of C6, C7, C8 connects the other end of J2 port, and ground connection; The positive pole of the other end connecting luminous diode D2 of R3, the negative pole of D2 connects the other end of J2 port.The V+ pin of U1 connects an end of J2 port, connects simultaneously an end of capacitor C 4, the other end ground connection of C4; The REF pin of U1 connects an end of capacitor C 5, the other end ground connection of C5; The SHDN pin of U1, FB pin, AGND pin ground connection; The GND pin ground connection of U1, the end of contact resistance R1 and R2 simultaneously, resistance R 1 be connected with R2 the other end connect U1 the CS pin and and the source S of metal-oxide-semiconductor Q1 and Q2; The EXT pin of U1 connects the grid G of metal-oxide-semiconductor Q1 and Q2, and the drain D of Q1 and Q2 is connected to the centre of inductance L 1 and diode D1; The J2 port is connected to the J1 port of accompanying drawing 2.
The specific implementation process of product is as shown in Figure 2: the J1 terminal of lithium battery 3.7V voltage by Fig. 2 is through fuse F1; thermistor RT; give resistance C1, C2, C3 charging; flow through inductance L 1 after the charging; give chip power supply behind the D1, chip begins to start, and opens metal-oxide-semiconductor after the startup; resistance R 1; electric current after R2 detects metal-oxide-semiconductor and opens feeds back to chip internal and compares, thereby increases output duty cycle; improve output voltage; make output voltage reach 12V, output 12V voltage is through C6, C7; through the output of the J2 terminal among the figure, the 12V Voltage-output of output is to the J1 port of second class protection line module behind the C8.
Referring to Fig. 3, the J1 terminal connects the output voltage of boost module, and when the output current of second class protection circuit during less than protective current, the G utmost point of Q13 is owing to isolated by capacitance C13, and the G pole tension of Q13 is lower than the S pole tension, and the Q13 conducting produces output; When output current reaches 1.2A when the output overcurrent, voltage on R12 and the R12A becomes 0.05V, U11C, U11B, U11D amplifies the voltage on R12 and the R12A, voltage after the amplification is exported through U11B, voltage and the D11 diode forward conduction voltage drop 0.6V reference voltage of output compare, the positive terminal voltage of U12A is higher than negative terminal voltage, and U12A produces a high level signal and makes the Q11 conducting, peak voltage when C12 and R120 absorb the Q11 transient switching, R117 and R118 produce dividing potential drop after the Q11 conducting, the G pole tension of Q12 is reduced, make metal-oxide-semiconductor Q12 conducting, the Q12 of conducting impels the G utmost point of Q13 identical with the current potential of the S utmost point, Q13 closes, Q13 can produce a reverse spike voltage when closing, C14, R122 are used for absorbing peak voltage.When input voltage surpasses 12.6V, this moment, the dividing potential drop on R111 and R112 surpassed the D11 diode forward during the reference voltage of conducting voltage 0.6V, the negative terminal voltage of U12B is higher than positive terminal voltage, and the output of U12B produces a low-voltage, and low-voltage causes simultaneously, the positive pole of D12 produces a low-voltage, can make R117 and R118 produce dividing potential drop, the G pole tension reduction with Q12 makes metal-oxide-semiconductor Q12 conducting, the Q12 of conducting impels the G utmost point of Q13 identical with the current potential of the S utmost point, and Q13 closes.When the both positive and negative polarity of circuit is done the spark short circuit, because the function of the inhibition electric current instantaneous variation of inductance L 1 is arranged, so spark is less during positive and negative contact, because inductive current can not suddenly change, will produce forward electromotive force at inductance, C11 and R124 are used for absorbing the forward peak voltage of electromotive force, after the both positive and negative polarity contact, R12, voltage drop on the R12A increases, and the voltage drop of generation is amplified through U11, and the voltage after the amplification surpasses the 0.5V reference voltage, produce a high level signal and make the Q11 conducting, peak voltage when C12 and R120 absorb the Q11 transient switching, R117 and R118 produce dividing potential drop after the Q11 conducting, with the G pole tension reduction of Q12, make metal-oxide-semiconductor Q12 conducting, the Q12 of conducting impels the G utmost point of Q13 identical with the current potential of the S utmost point, and Q13 closes, and Q13 can produce a reverse spike voltage when closing, C14, R122 are used for absorbing peak voltage.Identical principle acts on another grade circuit.This part illustrates the operation principle when using the 1A electric current to protect.
Second is second class protection; so the difference of this second class protection and second class protection in the past is placed on the negative pole (perhaps being also referred to as ground wire) of power supply at the resistance with collection signal; the small voltage that collects is amplified; the voltage that amplifies and the cathode voltage on the diode compare; conducting and shutoff by comparator 1 N-MOS of control and 2 P-MOS; and increase an inductance; increase the RC circuit at inductance; be used for peak voltage on the absorption inductor; increase a transient state at the D of the PMOS utmost point and suppress diode, in order to absorb the peak voltage that produces at MOS in the output short-circuit process.
Safe secondary protection circuit as shown in Figure 3.2 pin of J1 port are connected in series resistance R 122, capacitor C 14, inductance L 1, and the other end of L1 connects VCC1; The anode of U11C is by resistance R 11 ground connection, and 1 pin of J1 is connected in series resistance R 12 and R12A, and the other end of R12A connects Vout1, is connected to simultaneously the anode of U11D by resistance R 13, and U11C is connected negative terminal by resistance R 15 connections with U11D; Connect by resistance R 14 between the output of U11C and the negative terminal; Connect by resistance R 16 between the output of U11D and the negative terminal; The output of U11C is connected to the negative terminal of U11B by resistance R 17; The output of U11D is connected to the anode of U11B by resistance R 18; Connect by resistance R 19 between the output of U11B and the negative terminal; The output of U11B is connected to the anode of U12A; The negative terminal of U12A is connected to the anode of U12B, is connected to simultaneously the positive pole of resistance R 113 and diode D11, and the minus earth of D11, the other end of R113 are connected to 2 pin of J1 port; The negative terminal of U12B is connected to the centre of R111 and R112, and the other end of R111 is connected to 2 pin of J1 port, the other end ground connection of R112; The output of U121 is connected to 2 pin of J1 port by R114; The output of U12A is connected to 2 pin of J1 port by R115; The output of U12A is connected to the grid G of metal-oxide-semiconductor Q11 by R116, and the output of U12A connects the negative pole of diode D13 simultaneously, and the positive pole of D13 is connected to the grid of metal-oxide-semiconductor Q11; The output of U12B connects the negative pole of diode D12, and the positive pole of D12 is connected to the drain electrode of metal-oxide-semiconductor Q11; The source ground of Q11; The drain electrode of Q11 is connected in series capacitor C 12 and resistance R 120 rear ground connection; The drain electrode of Q11 is connected in series 2 pin that are connected to the J1 port behind resistance R 118 and the R117; Node in the middle of R117 and the R118 is connected to the grid of metal-oxide-semiconductor Q12 by resistance R 119; The source electrode of Q12 is connected to 2 pin of J1 port, and drain electrode is connected to the grid of metal-oxide-semiconductor Q13, simultaneously by resistance R 123 ground connection; The source electrode of Q13 is connected to 2 pin of J1 port, connects simultaneously an end of capacitor C 13, the end of the other end contact resistance R121 of C13 and the negative pole of Zener diode ZD11, and the other end of R power 1 connects the drain electrode of Q13, the plus earth of ZD11; The drain electrode of Q13 connects the node in the middle of C14 and the L1, is connected in series simultaneously resistance R 124 and capacitor C 11, then is connected to VCC1; The end of VCC1 contact resistance R125 and the negative pole of diode D14, the other end of R125 and the positive pole of D14 are connected to Vout1.Another part and the foregoing circuit of safe secondary protection circuit are similar, are not giving unnecessary details at this.
According to Fig. 3, when output current during less than protective current, the G utmost point of Q13 is owing to isolated by capacitance C13, and the G pole tension of Q13 is lower than the S pole tension, and the Q13 conducting produces output; U11C when the output overcurrent, U11B, U11D three parts are amplified voltage, voltage after the amplification is exported through U11B, voltage and the D11 diode forward conduction voltage drop 0.6V reference voltage of output compare, the positive terminal voltage of U12A is higher than negative terminal voltage, and U12A produces a high level signal and makes the Q11 conducting, peak voltage when C12 and R120 absorb the Q11 transient switching, R117 and R118 produce dividing potential drop after the Q11 conducting, the G pole tension of Q12 is reduced, make metal-oxide-semiconductor Q12 conducting, the Q12 of conducting impels the G utmost point of Q13 identical with the current potential of the S utmost point, Q13 closes, Q13 can produce a reverse spike voltage when closing, C14, R122 are used for absorbing peak voltage.Overvoltage protection: when the dividing potential drop of input voltage on R111 and R112 surpasses the D11 diode forward during the reference voltage of conducting voltage 0.6V; the negative terminal voltage of U12B is higher than positive terminal voltage; the output of U12B produces a low-voltage; low-voltage causes the positive pole of D12 to produce a low-voltage simultaneously; can make R117 and R118 produce dividing potential drop, the G pole tension reduction with Q12 makes metal-oxide-semiconductor Q12 conducting; the Q12 of conducting impels the G utmost point of Q13 identical with the current potential of the S utmost point, and Q13 closes.When the both positive and negative polarity of circuit is done the spark short circuit, because the function of the inhibition electric current instantaneous variation of inductance L 1 is arranged, so spark is less during positive and negative contact, because inductive current can not suddenly change, will produce forward electromotive force at inductance, C11 and R124 are used for absorbing the forward peak voltage of electromotive force, after the both positive and negative polarity contact, R12, voltage drop on the R12A increases, and the voltage drop of generation is through U11C, U11B, U11D amplifies, voltage after the amplification is exported through U11B, and the voltage of output and D11 diode forward conduction voltage drop 0.6V reference voltage compare, and the positive terminal voltage of U12A is higher than negative terminal voltage, U12A produces a high level signal and makes the Q11 conducting, peak voltage when C12 and R120 absorb the Q11 transient switching, R117 and R118 produce dividing potential drop after the Q11 conducting, with the G pole tension reduction of Q12, make metal-oxide-semiconductor Q12 conducting, the Q12 of conducting impels the G utmost point of Q13 identical with the current potential of the S utmost point, and Q13 closes, and Q13 can produce a reverse spike voltage when closing, C14, R122 are used for absorbing peak voltage.Identical principle acts on another grade circuit.These 2 grades of circuit are identical, because be 2 grades of circuit, the ground of the first order and the ground of the second level separate, and Vout1 is a label, and all Vout1 connect together.
By this circuit diagram and after being depicted as actual circuit board, successfully transfer the direct voltage of 12V, output current 0.6A to by lithium battery 3.7V voltage; The second class protection plate can start work, and the work protective current is 1A, and overvoltage protection is 12.5V, and product is tested through tens thousand of times spark, bad phenomenon do not occur.
Because the particularity of coal production, product under the requirement colliery is when being short-circuited or when the contact point on the circuit comes off, passable in the situation of not cutting off externally fed, can directly the load product be connected to the output of power supply, and requirement can not produce spark, the gas around the spark that perhaps produces can not be ignited; And to require the protection of product the inside be second class protection in the colliery, and after first order protection was lost efficacy, second level protection can continue to work, and this second class protection can be applied to colliery etc. and contain in the environment of methane gas.
Although in specific embodiments, described embodiment of the present invention and various functional unit thereof, but be to be understood that, can realize embodiment of the present invention with hardware, software, firmware, middleware or their combination, and embodiment of the present invention can be used in multiple systems, subsystem, assembly or its sub-component.Each embodiment of the present invention can with other embodiment in device mutually make up, rather than isolated, single embodiment can mutually merge between all embodiment and forms new embodiment or different solutions.
Although the present invention detailed illustrate and described one relevant and specifically implement the example reference, those skilled in the art should be understood that, can make in the form and details various changes not deviating from the spirit and scope of the present invention.These change the claim of the present invention scope required for protection that all will fall into.
Claims (4)
1. a mine intrinsic safety lithium battery power supply system is characterized in that, described mine intrinsic safety lithium battery power supply system comprises:
Lithium battery and protection module thereof are comprised of lithium battery and charge and discharge protecting module, for the protection of lithium battery overshoot electricity, and the overdischarge of protection lithium battery, and when the temperature of lithium battery surpasses dangerous temperature, lithium battery is cut off the power supply;
Boost module, the 3.7V voltage transitions that is used for lithium battery is the required 12V voltage of load, and outputs to the second class protection line module;
The second class protection line module is comprised of two identical parts, and every part comprises output over-voltage protection and output overcurrent protection.
2. such as the mine intrinsic safety lithium battery power supply system in the claim 1, it is characterized in that:
In lithium battery and protection module thereof, by the closing and opening of transistor switch, realize lithium battery overcharge, when overdischarge and excess Temperature, to the lithium battery outage, thus prevent lithium battery overshoot, cross and put and surpass dangerous temperature.
3. such as the mine intrinsic safety lithium battery power supply system in the claim 1, it is characterized in that:
Booster circuit uses the MAX1771 chip as main control chip, is 12V voltage with low voltage transition directly, drives the voltage that 2 metal-oxide-semiconductors produce 12V.
4. such as the mine intrinsic safety lithium battery power supply system in the claim 1, it is characterized in that:
Adopt new safe secondary protection circuit; overcurrent protection resistance is placed on the negative pole end of power supply product; first the voltage that gathers on the overcurrent protection resistance is amplified; overcurrent protection resistance voltage and reference voltage after the amplification compare, thereby so that power end can use long wire to the wire of equipment end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210587751.9A CN103078300B (en) | 2012-12-31 | 2012-12-31 | Mine intrinsic safety lithium battery power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210587751.9A CN103078300B (en) | 2012-12-31 | 2012-12-31 | Mine intrinsic safety lithium battery power supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103078300A true CN103078300A (en) | 2013-05-01 |
| CN103078300B CN103078300B (en) | 2016-03-30 |
Family
ID=48154749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210587751.9A Active CN103078300B (en) | 2012-12-31 | 2012-12-31 | Mine intrinsic safety lithium battery power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103078300B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617547A (en) * | 2015-02-15 | 2015-05-13 | 山东微感光电子有限公司 | Dual-protection circuit for mine intrinsically safe power supply |
| CN105342584A (en) * | 2015-10-14 | 2016-02-24 | 天津华宁电子有限公司 | Mining monitoring system |
| WO2018039881A1 (en) * | 2016-08-29 | 2018-03-08 | 华为技术有限公司 | Electric charging protection method, terminal, and charger |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2733704Y (en) * | 2004-08-06 | 2005-10-12 | 西安森兰科贸有限责任公司 | Intrinsic safety lithium ion power supply |
| CN1747278A (en) * | 2005-10-21 | 2006-03-15 | 成都龙盾数码通信技术有限公司 | Circuit for controlling series battery charge and discharge |
| CN200989919Y (en) * | 2006-11-02 | 2007-12-12 | 熊猫电子集团有限公司 | Electric current monitor for power station |
| CN101202462A (en) * | 2007-11-02 | 2008-06-18 | 南开大学 | Multifunctional carry-on power supply |
| CN201414081Y (en) * | 2009-06-05 | 2010-02-24 | 徐州珂尔玛科技有限公司 | Mine flameproof and intrinsically safe power supply |
| US20110149454A1 (en) * | 2008-03-07 | 2011-06-23 | Kabushiki Kaisha Toshiba | Battery system |
| CN102282740A (en) * | 2009-01-14 | 2011-12-14 | 三美电机株式会社 | Protection/monitor circuit and battery pack |
| CN202309039U (en) * | 2011-06-20 | 2012-07-04 | 黄仁柏 | Lithium-ion/lithium-polymer battery pack protection circuit |
| CN102611163A (en) * | 2012-03-22 | 2012-07-25 | 山西潞安环保能源开发股份有限公司 | Lithium iron phosphate uninterrupted power supply device for coal mine underground monitoring and control |
| CN202997530U (en) * | 2012-12-31 | 2013-06-12 | 山西科达自控工程技术有限公司 | A mine-used intrinsically safe lithium battery power supply system |
-
2012
- 2012-12-31 CN CN201210587751.9A patent/CN103078300B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2733704Y (en) * | 2004-08-06 | 2005-10-12 | 西安森兰科贸有限责任公司 | Intrinsic safety lithium ion power supply |
| CN1747278A (en) * | 2005-10-21 | 2006-03-15 | 成都龙盾数码通信技术有限公司 | Circuit for controlling series battery charge and discharge |
| CN200989919Y (en) * | 2006-11-02 | 2007-12-12 | 熊猫电子集团有限公司 | Electric current monitor for power station |
| CN101202462A (en) * | 2007-11-02 | 2008-06-18 | 南开大学 | Multifunctional carry-on power supply |
| US20110149454A1 (en) * | 2008-03-07 | 2011-06-23 | Kabushiki Kaisha Toshiba | Battery system |
| CN102282740A (en) * | 2009-01-14 | 2011-12-14 | 三美电机株式会社 | Protection/monitor circuit and battery pack |
| CN201414081Y (en) * | 2009-06-05 | 2010-02-24 | 徐州珂尔玛科技有限公司 | Mine flameproof and intrinsically safe power supply |
| CN202309039U (en) * | 2011-06-20 | 2012-07-04 | 黄仁柏 | Lithium-ion/lithium-polymer battery pack protection circuit |
| CN102611163A (en) * | 2012-03-22 | 2012-07-25 | 山西潞安环保能源开发股份有限公司 | Lithium iron phosphate uninterrupted power supply device for coal mine underground monitoring and control |
| CN202997530U (en) * | 2012-12-31 | 2013-06-12 | 山西科达自控工程技术有限公司 | A mine-used intrinsically safe lithium battery power supply system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617547A (en) * | 2015-02-15 | 2015-05-13 | 山东微感光电子有限公司 | Dual-protection circuit for mine intrinsically safe power supply |
| CN104617547B (en) * | 2015-02-15 | 2017-12-05 | 山东微感光电子有限公司 | A kind of mine intrinsic safety electric source dual-protection circuit |
| CN105342584A (en) * | 2015-10-14 | 2016-02-24 | 天津华宁电子有限公司 | Mining monitoring system |
| WO2018039881A1 (en) * | 2016-08-29 | 2018-03-08 | 华为技术有限公司 | Electric charging protection method, terminal, and charger |
| US11476684B2 (en) | 2016-08-29 | 2022-10-18 | Huawei Technologies Co., Ltd. | Charging protection method, terminal, and charger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103078300B (en) | 2016-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7902794B2 (en) | Over-voltage protected battery charger with bypass | |
| KR101074785B1 (en) | A battery management system and control method thereof, and energy storage system including the battery management system | |
| CN201667547U (en) | Lithium battery protection module with embedded programmable switch type charging function | |
| CN104849536B (en) | It is a kind of be applied to can serial lithium battery group protection chip detection circuit | |
| CN201699401U (en) | Protection circuit of power lithium ion battery | |
| CN101888097A (en) | Micro-power consumption high-capacity lithium-ion power battery group management device | |
| CN101741124A (en) | Battery charging circuit and power supply device | |
| CN102969698A (en) | Semiconductor integrated circuit, protection circuit, and battery pack | |
| CN106787045B (en) | Direct current power supply system and control method thereof | |
| CN202014087U (en) | Lithium battery charging protection circuit for portable system | |
| CN103078300B (en) | Mine intrinsic safety lithium battery power supply system | |
| CN206650467U (en) | A kind of management of charging and discharging circuit of lithium battery | |
| CN205407332U (en) | A reserve power supply unit for fault indicator | |
| CN202997530U (en) | A mine-used intrinsically safe lithium battery power supply system | |
| CN104218648A (en) | Charging and discharging protection circuit and charging and discharging system | |
| CN203466560U (en) | Intelligent lithium battery guide plate | |
| CN201222661Y (en) | Lithium battery protection device with zero discharging function during storage period | |
| CN102611163A (en) | Lithium iron phosphate uninterrupted power supply device for coal mine underground monitoring and control | |
| CN203690903U (en) | Battery under-voltage protection circuit | |
| US20050212483A1 (en) | Charging/discharging management system for lithium battery packs | |
| CN209184290U (en) | A kind of power supply management circuit | |
| CN203352147U (en) | Lithium ion battery protection circuit | |
| CN203398833U (en) | Battery charging/discharging circuit of uninterruptible power supply | |
| CN104283195A (en) | Storage battery protection circuit preventing overcharge | |
| CN103779839B (en) | A kind of automatic shutoff start-up circuit adopting rechargeable battery to power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 030006 Taiyuan province high tech Zone Development Lane No. 10 (venture building, block, three, east of the eastern part of the B) Applicant after: SHANXI KEDA AUTOMATION CONTROL Co.,Ltd. Address before: 030006, B building, No. 12, Pioneer Building, Lane three, Taiyuan hi tech Zone, Shanxi, Taiyuan Applicant before: SHANXI KEDA AUTOMATIC CONTROL ENGINEERING TECHNOLOGY Co.,Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: KEDA SELF-CONTROL ENGINEERING TECHNOLOGY, SHAANXI PROV. TO: SHANDONG KEDA AUTOMATION CONTROL CO., LTD. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Mine intrinsic safety lithium battery power supply system Effective date of registration: 20171016 Granted publication date: 20160330 Pledgee: Taiyuan high tech Zone SME financing Company limited by guarantee Pledgor: SHANXI KEDA AUTOMATION CONTROL Co.,Ltd. Registration number: 2017140000022 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181023 Granted publication date: 20160330 Pledgee: Taiyuan high tech Zone SME financing Company limited by guarantee Pledgor: SHANXI KEDA AUTOMATION CONTROL Co.,Ltd. Registration number: 2017140000022 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Mine intrinsic safety lithium battery power supply system Effective date of registration: 20200424 Granted publication date: 20160330 Pledgee: Shanxi enterprises re Company limited by guarantee Pledgor: SHANXI KEDA AUTOMATION CONTROL Co.,Ltd. Registration number: Y2020980001749 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220713 Granted publication date: 20160330 Pledgee: Shanxi enterprises re Company limited by guarantee Pledgor: SHANXI KEDA AUTOMATION CONTROL Co.,Ltd. Registration number: Y2020980001749 |