CN112124149B - New energy automobile battery detection device - Google Patents
New energy automobile battery detection device Download PDFInfo
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- CN112124149B CN112124149B CN202011049273.7A CN202011049273A CN112124149B CN 112124149 B CN112124149 B CN 112124149B CN 202011049273 A CN202011049273 A CN 202011049273A CN 112124149 B CN112124149 B CN 112124149B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/15—Preventing overcharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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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
- H02J7/00302—Overcharge protection
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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
- H02J7/00309—Overheat or overtemperature protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses a new energy automobile battery detection device, which further comprises a signal detection circuit and a trigger protection circuit, and effectively solves the problem that a lithium battery is overcharged when being charged. The signal detection circuit detects a voltage signal of a lithium battery E by using a voltage sensor U1, performs low-pass filtering on the voltage signal by using a resistor R1, a capacitor C1, a resistor R2, a capacitor C2 and an operational amplifier U2B, performs buffer amplification on the voltage signal by using a triode Q2 and a triode Q3, simultaneously detects a temperature signal of the lithium battery E by using a resistor R10, transmits the temperature signal and the voltage signal to a trigger protection circuit, outputs a voltage signal difference value obtained by the operational amplifier U3B and a temperature signal received by a voltage stabilizing tube D6 to an OR gate U4, outputs a high level by the OR gate U4 when the voltage stabilizing tube D6 or the triode Q5 is conducted, changes the pin connection state of a relay K1 by using the triode Q5, and forms protection when the lithium battery E is charged by using an alternating current V1.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to a new energy automobile battery detection device.
Background
As one of the traffic ways appearing in recent times, automobiles are becoming the most popular means of transportation with their characteristics of lightness and convenience. Along with the enhancement of people's environmental protection consciousness, people begin to use the mode of comparatively environmental protection to provide the energy for the car, if utilize the lithium cell for the new energy automobile of car power supply, utilize the old car of riding instead of walk of lithium cell power supply to reduce or even do not produce the harmful gas of emission in the automobile exhaust.
The lithium cell is very easily appearing the phenomenon that the battery capacity is not enough and leads to the car to go for the in-process of car power supply, need charge for the lithium cell, people generally adopt alternating current voltage source to carry out quick charge for the lithium cell, and when the lithium cell charges, because of not knowing when the lithium cell is full of the electricity, often carry out long-time charging so that the problem of overcharging has appeared to the lithium cell, and then lead to the lithium cell to appear warping, bad phenomena such as weeping, and simultaneously, the electrical property of lithium cell also can show the reduction, and the appearance of these phenomena is irreversible. The BMS battery management system designed in the prior art solves the problem of overcharge, but the BMS battery management system is expensive in manufacturing cost, and when manufacturers manufacture cheap new energy automobiles such as the old mobility scooter, the system is not installed for reducing the cost, and the phenomenon that the lithium battery is overcharged cannot be solved.
The present invention therefore provides a new solution to this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a new energy automobile battery detection device, which effectively solves the problem that a lithium battery is overcharged when being charged.
The technical scheme includes that the new energy automobile battery detection device comprises a lithium battery, and further comprises a signal detection circuit and a trigger protection circuit, wherein the signal detection circuit detects a voltage signal of the lithium battery E by using a voltage sensor U1, performs low-pass filtering on the voltage signal by using a resistor R1, a capacitor C1, a resistor R2, a capacitor C2 and an operational amplifier U2B, performs buffer amplification on the voltage signal by using a triode Q2 and a triode Q3, simultaneously transmits a temperature signal of the lithium battery E detected by the resistor R10 and the temperature signal and the voltage signal to the trigger protection circuit, the trigger protection circuit receives the voltage signal, performs subtraction operation on the thyristor Q4 and a next voltage signal detected by the voltage sensor U1 by using an operational amplifier U3B, and outputs a difference value to an I1 pin on an OR gate U4 when the triode Q6 is switched on by the difference value output by the operational amplifier U3B, the pin I0 of the OR gate U4 receives a temperature signal through a voltage regulator tube D6, and the high level output by the OR gate U4 changes the pin connection state of the relay K1 through a triode Q5.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
the voltage signal is low-pass filtered by arranging a resistor R1, a capacitor C1, a resistor R2, a capacitor C2 and an operational amplifier U2B, the triode Q1 is used for checking the filtering effect, the triode Q2 and the triode Q3 are used for buffering and amplifying the voltage signal, the capability of driving the rear stage of the voltage signal is improved, the generation that the voltage signal can not drive the rear stage circuit is avoided, meanwhile, a resistor R10 is arranged to detect the temperature signal of the lithium battery E, so that the damage caused by charging the lithium battery E at high temperature is avoided, the difference value of the peak voltage and the voltage signal transmitted by the triode Q6 and the temperature signal received by the voltage regulator tube D3 are processed by the OR gate U4, the overcharge phenomenon of the lithium battery E by the alternating current voltage source V1 is avoided, the damage caused by charging the lithium battery E at high temperature by the alternating current voltage source V1 is avoided, and the protection of the lithium battery E is formed.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The new energy automobile battery detection device is applied to a lithium battery of a new energy automobile, the detection device detects a voltage signal and a temperature signal of the lithium battery, the signal detection circuit detects the voltage signal of the lithium battery E by using a voltage sensor U1 with a model similar to CE-AV12N, the voltage signal is filtered by a low-pass filter consisting of a resistor R1, a capacitor C1, a resistor R2, a capacitor C2 and an operational amplifier U2B, when the voltage signal is detected to have other frequency signals, the voltage signal is fed back to the low-pass filter by using a triode Q1 for re-filtering, interference in the voltage signal is further filtered by using an inductor L1, a capacitor C3 and a varactor diode D1, and in order to improve the capacity of the voltage signal for driving a rear-stage circuit, the push-pull buffer amplification circuit consisting of a triode Q2, a triode Q3, a diode D2 and a diode D3 as cores, the triode Q2, the temperature signal and the voltage signal detection circuit detects the voltage signal of the lithium battery E by using a voltage sensor U1 as a low-frequency signal, The bases of the triode Q3 are divided by adopting a resistor voltage division mode, the diode D2 and the diode D3 are in positive phase bias and are used for keeping the base voltage of the triode Q2 and the base voltage of the triode Q3 stable, meanwhile, the resistor R10 is used for detecting a battery temperature signal of the lithium battery E, the resistor R10 is a PTC thermistor, when the temperature of the lithium battery E is detected to be higher, the voltage value obtained by dividing the resistor R10 from a voltage division circuit formed by the resistor R10 and the resistor R11 is higher, namely the amplitude value of the temperature signal is higher, the temperature signal is transmitted to a trigger protection circuit, the voltage signal is also transmitted to the trigger protection circuit through the capacitor C4, the trigger protection circuit receives the voltage signal and transmits the voltage signal to the operational amplifier U3B, and when the thyristor Q4 is conducted by the voltage signal detected by a voltage sensor, the voltage of the lithium battery E is shown to reach the peak voltage and the peak voltage is stored at the same phase end of the operational amplifier U3B, the diode D7 is continuously used for receiving the transmitted voltage signal, the operational amplifier U3B, the resistor R15, the resistor R9 and the resistor R8 form a subtraction operation circuit, when the difference between the amplitude value of the voltage signal and the peak voltage can conduct the transistor Q6 through the resistor R6, the difference between the peak voltage and the voltage signal detected in real time is large, which indicates that the lithium battery E has been charged and does not need to be charged again, at this time, the transistor Q6 inputs the difference to the I1 pin of the or gate U4 through the resistor R17, while when the voltage stabilizing D6 is conducted in reverse phase by using the temperature signal detected by the resistor R10 in the signal detection circuit, which indicates that the temperature inside the lithium battery is high and is not suitable for continuous charging, the temperature signal is transmitted to the I0 pin of the or gate U4 through the resistor R13, or the gate U4 generates any one of the difference between the I2 pin input to the or gate U4 through the resistor R13 and the I8653 or the gate U8653 through the transistor Q6, the OR gate U4 outputs high level to conduct the triode Q5, the collector of the triode Q5 is electrified, the coil of the relay K1 is electrified, the connection state of the pin of the relay K1 is changed, the 5 pin of the relay K1 is changed from the originally connected 4 pin to be connected with the 3 pin, the connection path between the AC voltage source V1 and the lithium battery E is disconnected, so that the lithium battery E is charged, when the I1 pin and the I0 pin of the OR gate U4 do not have the difference value input by the triode Q6 and the temperature signal transmitted by the resistor R13 respectively, the OR gate U4 cannot output high level, the triode Q5 cannot be conducted, so that the pin connection state of the relay K1 is still kept with the 5 pin connected to the 4 pin, the AC voltage source V1 and the lithium battery E are still in a complete connection path, and the AC voltage source V1 continues to charge the lithium battery E, so that protection is formed;
the signal detection circuit detects a voltage signal of a lithium battery E by using a voltage sensor U1 with a model similar to CE-AV12N, the voltage signal is filtered by a low-pass filter composed of a resistor R1, a capacitor C1, a resistor R2, a capacitor C2 and an operational amplifier U2B, the frequency of the voltage signal is reserved, signals with other frequencies are filtered, the signals with other frequencies are prevented from influencing the voltage signal, in order to prevent the low-pass filter from being incapable of completely filtering the signals with other frequencies, the voltage signal is fed back to the low-pass filter by using a triode Q1 for re-filtering, interference in the voltage signal is further filtered by using an inductor L1, a capacitor C3 and a varactor D1, the voltage signal without interference influence is transmitted to a rear stage, and in order to improve the capacity of the voltage signal for driving the rear stage circuit, the triode Q2, the triode Q3, a diode D2, a low-pass filter and a low-pass filter are used for further filtering the voltage signal, The diode D3 is a push-pull buffer amplifying circuit composed of a core, the bases of the triode Q2 and the triode Q3 adopt resistance voltage division type voltage division, the diode D2 and the diode D3 are positively biased to keep the base voltages of the triode Q2 and the triode Q3 stable, the triode Q2 and the triode Q3 are emitter output circuits, the output impedance is reduced, and the capability of driving a rear-stage circuit can be improved, wherein positive-polarity voltage is respectively supplied to the triode Q1, the triode Q2 and the voltage sensor U1, meanwhile, the battery temperature signal of the lithium battery E is detected by using the resistor R10, the resistor R10 is a PTC thermistor, when the temperature of the lithium battery E is higher, the higher the voltage value of the resistor R10 divided from the voltage division circuit composed of the resistor R10 and the resistor R11 is, namely, the higher the amplitude value of the temperature signal is higher, the temperature signal is transmitted to the trigger protection circuit, the voltage signal is also transmitted to the trigger protection circuit through a capacitor C4, and includes a resistor R1, one end of the resistor R1 and an out pin of a voltage sensor U1, the other end of the resistor R1 is respectively connected to one end of a resistor R2 and one end of a capacitor C1, the other end of the resistor R2 is respectively connected to one end of a capacitor C2 and a non-inverting end of an operational amplifier U2B, an inverting end of the operational amplifier U2B is respectively connected to the other end of a capacitor C1 and an emitter of a transistor Q1, the other end of a capacitor C2 is respectively connected to a gnd pin of the voltage sensor U1, one end of a capacitor C3, a cathode of a varactor D3, one end of a resistor R3, a collector of the transistor Q3, and a collector of the transistor Q3, one end of the resistor R3 is connected to ground, an output end of the operational amplifier U2 3 is respectively connected to a base of the transistor Q3 and one end of an inductor L3, a collector of the transistor Q3, and one end of the transistor R3 are respectively connected to one end of the other end of the transistor R3, A VCC pin of a voltage sensor U1 is connected with a positive polarity power supply VCC, the other end of an inductor L1 is respectively connected with the other end of a resistor R4, the base of a triode Q2, the anode of a diode D2, the other end of a capacitor C3 and the anode of a varactor D1, the cathode of a diode D2 is connected with the anode of a diode D3, the cathode of a diode D3 is respectively connected with the base of a triode Q3 and one end of a resistor R5, the emitter of the triode Q3 is connected with one end of a resistor R7, the other end of a resistor R7 is respectively connected with one end of a capacitor C4, one end of a resistor R6, the other end of a resistor R6 is connected with the emitter of a triode Q2, the other end of a resistor R10 is connected with one end of a resistor R11, and the other end of the resistor R11 is connected with a positive polarity voltage VCC;
the trigger protection circuit receives a voltage signal and transmits the voltage signal to the operational amplifier U3B, when a thyristor Q4 is conducted by the voltage signal detected by the voltage sensor, the voltage signal indicates that the voltage of the lithium battery E reaches a peak voltage position, the peak voltage is stored at the same-phase end of the operational amplifier U3B, the diode D7 is continuously utilized to receive the transmitted voltage signal, the operational amplifier U3B, the resistor R15, the resistor R9 and the resistor R8 form a subtraction operation circuit, when the difference value between the amplitude value of the voltage signal and the peak voltage can conduct the triode Q6 through the resistor R6, the difference value between the peak voltage and the voltage signal detected in real time is larger, the lithium battery E is charged, no charging is needed, at the moment, the triode Q6 inputs the difference value to an I1 pin of the OR gate U4 through the resistor R17, and when the voltage stabilizing D6 is conducted in a reversed phase by the temperature signal detected by the resistor R10 in the signal detection circuit, when the temperature signal is transmitted to the pin I0 of the OR gate U4 through the resistor R13, the OR gate U4 inputs a difference value to the pin I1 of the OR gate U4 through the resistor R17 in the triode Q6 or the temperature signal is transmitted to the pin I0 of the OR gate U4 through the resistor R13 or both occur simultaneously, the OR gate U4 outputs a high level to turn on the transistor Q5, the collector of the transistor Q5 is electrified, the coil of the relay K1 is electrified, the pin connection state of the relay K1 is changed, the pin 5 of the relay K1 is changed from the pin 4 connected originally to the pin 3, the connection path between the AC voltage source V1 and the lithium battery E is disconnected to charge the lithium battery E, and when the pin I1 of the OR gate U4 and the pin I0 do not have the difference value input by the transistor Q6 and the temperature signal transmitted by the resistor R13, the OR gate U4 can not output high level, the triode Q5 can not be conducted, so that the pin connection state of the relay K1 is still maintained in a 5-pin connection state on a 4-pin, a complete connection path is still formed between the alternating current voltage source V1 and the lithium battery E, the alternating current voltage source V1 continuously charges the lithium battery E, and protection is formed, the protection device comprises a diode D7, one end of the diode D7 is connected with the control electrode of the thyristor Q4 and the other end of the capacitor C4 of the signal detection circuit respectively, the negative electrode of the diode D7 is connected with one end of the resistor R15 and the inverting end of the operational amplifier U3B respectively, the inverting end of the operational amplifier U3B is connected with one end of the resistor R8 and one end of the resistor R9 respectively, the other end of the resistor R9 is connected with the anode of the thyristor Q4, the cathode of the thyristor Q4 is connected with the other end of the resistor R8, the emitter of the triode Q6, the first time of the resistor R16, the emitter of the triode Q6 and the other end of the capacitor C2 of the signal detection circuit, A gnd pin of a voltage sensor U1, one end of a capacitor C3, a negative electrode of a varactor D1, one end of a resistor R5, a collector of a triode Q3 and one end of a resistor R10 are connected in parallel and grounded, an output end of an operational amplifier U3B is respectively connected with the other end of a resistor R15 and one end of a resistor R12, the other end of a resistor R12 is respectively connected with the other end of a resistor R16 and a base of a triode Q6, a collector of the triode Q6 is respectively connected with one end of a resistor R17, a negative electrode of a diode D5, a pin 1 of a relay K1 and one end of a resistor R1 in a signal detection circuit are connected with a positive power supply VCC, a negative electrode of a regulator D1 is respectively connected with one end of a resistor R1 and the other end of the resistor R1 in the signal detection circuit, a positive electrode of the regulator D1 is respectively connected with one end of the resistor R1, the other end of the resistor R1 is connected with an I1 pin of the gate U1, the output end of the or gate U4 is respectively connected with one end of a resistor R14 and the base electrode of a triode Q5, the emitter electrode of the triode Q5 is respectively connected with the other end of a resistor R14 and the 3 pins of a relay K1 and is grounded, the collector electrode of the triode Q5 is respectively connected with the anode of a diode D5 and the 2 pins of the relay K1, one end of the 4 pins of a relay K1 is connected with the cathode of a lithium battery E, the other end of the 4 pins of the relay K1 is connected with one end of the 5 pins of a relay K1, the other end of the 5 pins of the relay K1 is connected with one end of an alternating current voltage source V1, and the other end of the alternating current voltage source V1 is connected with the anode of the lithium battery E.
When the invention is used specifically, the signal detection circuit detects the voltage signal of the lithium battery E by using a voltage sensor U1 with the model similar to CE-AV12N, the voltage signal is filtered by a low-pass filter composed of a resistor R1, a capacitor C1, a resistor R2, a capacitor C2 and an operational amplifier U2B, when the voltage signal is detected to have other frequency signals, the voltage signal is fed back to the low-pass filter by using a triode Q1 for re-filtering, the interference in the voltage signal is further filtered by using an inductor L1, a capacitor C3 and a varactor diode D1, in order to improve the capability of the voltage signal to drive a rear-stage circuit, a push-pull buffer amplification circuit composed of a triode Q2, a triode Q3, a diode D2 and a diode D3 as cores, the bases of the triode Q2 and the triode Q3 adopt divided-voltage type voltage, the diode D2 and the diode D3 are in positive phase bias, the lithium battery temperature detection circuit is used for keeping the base voltage of the triode Q2 and the base voltage of the triode Q3 stable, meanwhile, a battery temperature signal of the lithium battery E is detected by using a resistor R10, the resistor R10 is a PTC thermistor, when the temperature of the lithium battery E is detected to be higher, the voltage value obtained by dividing the resistor R10 from a voltage dividing circuit consisting of a resistor R10 and a resistor R11 is higher, namely the amplitude value of the temperature signal is higher, the temperature signal is transmitted to a trigger protection circuit, the voltage signal is transmitted to the trigger protection circuit through a capacitor C4, the trigger protection circuit receives the voltage signal and transmits the voltage signal to an operational amplifier U3B, when a thyristor Q4 is conducted by using a voltage signal detected by a voltage sensor, the voltage of the lithium battery E is shown to reach the peak voltage, the peak voltage is stored at the same-phase end of the operational amplifier U3B, the diode D7 is continuously used for receiving the transmitted voltage signal, and the operational amplifier U3B, the resistor R15, the resistor R9 and the resistor R11 are connected with the same time, The resistor R8 forms a subtraction operation circuit, when the difference value between the amplitude value of the voltage signal and the peak voltage can turn on the transistor Q6 through the resistor R6, the difference value between the peak voltage and the voltage signal detected in real time is larger, which indicates that the lithium battery E is charged and does not need to be charged again, at this time, the difference value is input to the pin I1 of the OR gate U4 through the resistor R17 by the transistor Q6, when the stabilized voltage D6 is turned on in an opposite phase by the temperature signal detected by the resistor R10 in the signal detection circuit, which indicates that the temperature inside the lithium battery is high and is not suitable for continuous charging, the temperature signal is transmitted to the pin I0 of the OR gate U4 through the resistor R13, the OR gate U4 outputs a high level when the difference value is input to the pin I1 of the OR gate U4 through the resistor R17 by the transistor Q6 or the temperature signal is transmitted to the pin I0 of the OR gate U4 through the resistor R13 or when the two occurs simultaneously, or the OR gate U4 outputs a high level to turn on the transistor Q5, the collector of the triode Q5 is electrified, so that the coil of the relay K1 is electrified, the pin connection state of the relay K1 is changed, the 5 pin of the relay K1 is changed from the originally connected 4 pin to the 3 pin, and the connection path between the alternating voltage source V1 and the lithium battery E is disconnected, so that the lithium battery E is charged, and protection is formed;
the voltage signal is low-pass filtered by arranging a resistor R1, a capacitor C1, a resistor R2, a capacitor C2 and an operational amplifier U2B, the triode Q1 is used for checking the filtering effect, the triode Q2 and the triode Q3 are used for buffering and amplifying the voltage signal, the capability of driving the rear stage of the voltage signal is improved, the generation that the voltage signal can not drive the rear stage circuit is avoided, meanwhile, a resistor R10 is arranged to detect the temperature signal of the lithium battery E, so that the damage caused by charging the lithium battery E at high temperature is avoided, the difference value of the peak voltage and the voltage signal transmitted by the triode Q6 and the temperature signal received by the voltage regulator tube D3 are processed by the OR gate U4, the overcharge phenomenon of the lithium battery E by the alternating current voltage source V1 is avoided, the damage caused by charging the lithium battery E at high temperature by the alternating current voltage source V1 is avoided, and the protection of the lithium battery E is formed.
Claims (2)
1. The new energy automobile battery detection device comprises a lithium battery and is characterized by further comprising a signal detection circuit and a trigger protection circuit, wherein the signal detection circuit detects a voltage signal of the lithium battery E by using a voltage sensor U1, performs low-pass filtering on the voltage signal by using a resistor R1, a capacitor C1, a resistor R2, a capacitor C2 and an operational amplifier U2B, performs buffer amplification on the voltage signal by using a triode Q2 and a triode Q3, simultaneously performs subtraction operation on the temperature signal of the lithium battery E detected by the resistor R10 and the temperature signal and the voltage signal which are transmitted to the trigger protection circuit, the trigger protection circuit receives the voltage signal, the thyristor Q4 and a next voltage signal detected by the voltage sensor U1 are subjected to subtraction operation by using the operational amplifier U3B after being switched on, and when a difference value output by the operational amplifier U3B switches on a triode Q6, the difference value is output to an I1 pin on the OR gate U4, an I0 pin of the OR gate U4 receives a temperature signal through a voltage regulator tube D6, and the high level output by the OR gate U4 changes the pin connection state of the relay K1 through a triode Q5;
the trigger protection circuit comprises a diode D7, one end of the diode D7 is connected to a control electrode of a thyristor Q4 and the other end of a capacitor C4 of the signal detection circuit, the negative electrode of the diode D7 is connected to one end of a resistor R15 and the inverting end of an operational amplifier U3B, the non-inverting end of the operational amplifier U3B is connected to one end of a resistor R8 and one end of a resistor R9, the other end of the resistor R9 is connected to the anode of a thyristor Q4, the cathode of the thyristor Q4 is connected to the other end of a resistor R8, one end of a resistor R16, the emitter of a triode Q6, the other end of a capacitor C6, a gnd pin of a voltage sensor U6, one end of a capacitor C6, the negative electrode of a varactor diode D6, one end of a resistor R6, the collector of a triode Q6 and one end of a resistor R6 in the signal detection circuit are connected in parallel, the output end of the operational U3 6 is connected to the other end of the resistor R6 and the other end of the resistor R6, and the resistor R6 in parallel, The base of a triode Q6, the collector of the triode Q6 is respectively connected with one end of a resistor R17, the cathode of a diode D5, a pin 1 of a relay K1 and one end of a resistor R11 in a signal detection circuit and is connected with a positive power supply VCC, the cathode of a voltage regulator D6 is respectively connected with one end of a resistor R11 in the signal detection circuit and the other end of a resistor R10, the anode of a voltage regulator D6 is respectively connected with one end of the resistor R13, the other end of the resistor R13 is connected with a pin I0 of an OR gate U4, a pin I1 of the gate U4 is connected with the other end of a resistor R17, the output end of the OR gate U4 is respectively connected with one end of a resistor R14 and the base of a triode Q5, the emitter of the triode Q5 is respectively connected with the other end of the resistor R14 and a pin 3 of a relay K1 and is grounded, the collector of the triode Q5 is respectively connected with the anode of a diode D5 and the pin 2 of a relay K1, and the cathode of a pin of a lithium battery K1E 4, the other end of the 4 pins of the relay K1 is connected with one end of the 5 pins of the relay K1, the other end of the 5 pins of the relay K1 is connected with one end of an alternating current voltage source V1, and the other end of the alternating current voltage source V1 is connected with the anode of the lithium battery E.
2. The new energy automobile battery detection device according to claim 1, wherein the signal detection circuit comprises a resistor R1, one end of the resistor R1 is connected to an out pin of a voltage sensor U1, the other end of the resistor R1 is connected to one end of a resistor R2 and one end of a capacitor C1, the other end of the resistor R2 is connected to one end of a capacitor C2 and the non-inverting end of an operational amplifier U2B, the inverting end of the operational amplifier U2B is connected to the other end of a capacitor C1 and the emitter of a transistor Q1, the other end of the capacitor C2 is connected to a gnd pin of a voltage sensor U1, one end of a capacitor C3, the cathode of a varactor D1, one end of a resistor R5, the collector of a transistor Q3 and one end of a resistor R10, the output end of the operational amplifier U2 is connected to the ground, the base of a transistor Q1 and one end of an inductor L1 are connected to the collector of the transistor Q1, and the other end of the resistor R874 is connected to one end of the resistor R1, and the other end of the resistor R1 are connected to one end of the resistor R36874, The collector of the triode Q2, the VCC pin of the voltage sensor U1 are connected with a positive polarity power supply VCC, the other end of the inductor L1 is connected with the other end of the resistor R4, the base of the triode Q2, the anode of the diode D2, the other end of the capacitor C3 and the anode of the varactor D1 respectively, the cathode of the diode D2 is connected with the anode of the diode D3, the cathode of the diode D3 is connected with the base of the triode Q3 and the one end of the resistor R5 respectively, the emitter of the triode Q3 is connected with one end of the resistor R7, the other end of the resistor R7 is connected with one end of the capacitor C4, one end of the resistor R6, the other end of the resistor R6 is connected with the emitter of the triode Q2, the other end of the resistor R10 is connected with one end of the resistor R11, and the other end of the resistor R11 is connected with the positive polarity voltage VCC.
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| CN112612309B (en) * | 2021-01-25 | 2021-10-15 | 郑州财经学院 | Temperature control device of router |
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