CN113267219A - Intelligent network-connected automobile lithium battery detection device - Google Patents
Intelligent network-connected automobile lithium battery detection device Download PDFInfo
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- CN113267219A CN113267219A CN202110592789.4A CN202110592789A CN113267219A CN 113267219 A CN113267219 A CN 113267219A CN 202110592789 A CN202110592789 A CN 202110592789A CN 113267219 A CN113267219 A CN 113267219A
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- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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Abstract
The invention discloses an intelligent network automobile lithium battery detection device, which effectively solves the problem that the prior art does not deeply determine the exact reason of temperature rise of a lithium battery during discharging, the temperature on the surface of the lithium battery is not increased, and the safety of the intelligent networked automobile is threatened, the temperature comparison circuit of the invention utilizes the thermistor PTCR to detect the temperature signal on the surface of the lithium battery and obtains the comparison result after comparison, the pressure detection circuit is conducted according to the comparison result, and the temperature signal is transmitted to the signal output circuit, the pressure detection circuit detects a pressure signal of the lithium battery by using a pressure detection circuit sensor U4, and the pressure signal is transmitted to the signal transmission circuit after passing through the receiver and the judger, and the signal transmission circuit generates an alarm signal by utilizing the temperature signal and the pressure signal through the calculator and the oscillator and transmits the alarm signal to the ECU, so that timely reminding of personnel in the vehicle is realized.
Description
Technical Field
The invention relates to the field of intelligent networking automobiles, in particular to an intelligent networking automobile lithium battery detection device.
Background
The intelligent networked automobile is an organic combination of an automobile network and an intelligent automobile, is provided with an advanced control system, is combined with modern communication and network technologies, realizes intelligent information exchange and sharing of the automobile, people, the automobile, roads, backstage and the like, realizes safety, comfort, energy conservation and high-efficiency driving, and generally changes a power source from gasoline into a lithium battery step by step for responding to the national environment-friendly call of the existing intelligent networked automobile like the automobile, so that the pollution of automobile tail gas to the environment is reduced, and for the safety of the intelligent networked automobile, a detection device for the lithium battery is also provided.
If the temperature of the lithium battery during charging and discharging is strictly detected in the prior art, if a detection device which does not take protective measures when the surface temperature of the lithium battery does not rise to a threshold value is arranged, but the detection of the internal pressure of the lithium battery is neglected, when the intelligent network automobile runs on a rugged road, internal short circuit of the lithium battery is easily caused, heat is released, and the phenomenon that the surface temperature of the lithium battery is increased is caused, and the detection device mistakenly considers the phenomenon as a normal phenomenon of discharge and temperature rise, so that the problem is not solved, and when the heat is released, the pressure in the lithium battery also begins to be increased, when the pressure is increased to a certain value, the lithium battery is easily exploded, so that the safety of the intelligent network automobile is threatened.
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 the intelligent network automobile lithium battery detection device, which effectively solves the problem that the prior art does not deeply determine the exact reason of the temperature rise of the lithium battery during the discharge, and the temperature rise on the surface of the lithium battery is not reasonable, so that the safety of the intelligent network automobile is threatened.
The technical scheme of its solution is, an intelligence networking car lithium cell detection device, including ECU, detection device includes temperature detection circuit, pressure detection circuit, signal transmission circuit, temperature comparison circuit utilizes thermistor PTCR to detect the temperature signal on lithium cell surface and obtains the comparative result after comparing, switches on the pressure detection circuit according to the comparative result to with temperature signal transmission to signal output circuit, the pressure detection circuit utilizes pressure detection circuit sensor U4 to detect the pressure signal of lithium cell to with pressure signal transmission to signal transmission circuit behind receiver and the judgement ware, signal transmission circuit utilizes temperature signal and pressure signal to produce alarm signal and transmit to ECU through calculator and oscillator.
Further, the temperature detection circuit detects a temperature signal of the surface of the lithium battery by using a thermistor PTCR, compares the detected temperature signal by using an operational amplifier U2B, switches on the pressure detection circuit according to a comparison result output by an operational amplifier U1B, and outputs the temperature signal to the signal transmission circuit.
Further, the temperature detection circuit comprises a triode Q1, the base of a triode Q1 is respectively connected with one end of a thermistor PTCR and the upper end of an adjustable resistor R3, the other end of the thermistor PTCR is respectively connected with one end of a resistor R10, one end of a capacitor C3, one end of a resistor R2, one end of a relay K1 and one end of a switch S2, the other end of the resistor R10 is connected with a positive power supply VCC, the collector of a triode Q1 is connected with the other end of the resistor R2, the emitter of a triode Q1 is respectively connected with one end of the resistor R11 and the positive electrode of a diode D1, the other end of the resistor R11 is respectively connected with the lower end of the adjustable resistor R3, the adjustable end of the adjustable resistor R3, the other end of the capacitor C3 and one end of a resistor R22 and is grounded, the other end of the diode D1 is connected with the in-phase end of an operational amplifier U1B, the inverting end of the operational amplifier U1B is respectively connected with one end of a resistor R13 and one end of a bipolar transistor D6, the other end of the resistor R13 is connected with a discharge temperature signal, the output end of the operational amplifier U1B is respectively connected with the anode of the diode D2, the other end of the bipolar TVS tube D6 and the cathode of the diode D2 and is connected with the base electrode of the triode Q2, the collector of the triode Q2 is connected with the other end of the relay K1, and the emitter of the triode Q2 is connected with the other end of the resistor R22.
Further, the pressure detection circuit includes a receiver that receives the pressure signal of the lithium battery detected by the pressure detection circuit sensor U4, and a determiner that outputs the pressure signal to the signal transmission circuit according to the magnitude of the pressure signal.
Further, the receiver comprises a resistor R4, one end of the resistor R4 is connected to an out pin of the pressure detection circuit sensor U4, the other end of the resistor R4 is connected to a non-inverting end of the operational amplifier U2B, an inverting end of the operational amplifier U2B is connected to one end of a resistor R15 and one end of a resistor R6, an output end of the operational amplifier U2B is connected to a base of a transistor Q3, a collector of the transistor Q3 is connected to one end of a resistor R5, the other end of the resistor R5 is connected to a vcc pin of the pressure detection circuit sensor U4 and the other end of a switch S2 in the temperature detection circuit, an emitter of the transistor Q3 is connected to the other end of the resistor R15 and one end of the resistor R1, the other end of the resistor R1 is connected to the other end of the resistor R6 and the gnd pin of the pressure detection circuit sensor U4 and connected to ground,
further, the determiner includes a resistor R7, one end of the resistor R7 is connected to the base of the transistor Q4, the base of the transistor Q6, the anode of the thyristor Q5, the emitter of the transistor Q3 in the receiver, and the cathode of the regulator D5, the other end of the resistor R7 is connected to the emitter of the transistor Q4, one end of the resistor R14, and the other end of the resistor R5 in the receiver, the collector of the transistor Q4 is connected to one end of the resistor R16 and the cathode of the regulator D3, the anode of the regulator D3 is connected to one end of the capacitor C1, one end of the resistor R8, the control electrode of the thyristor Q5, and the anode of the regulator D4, the cathode of the thyristor Q5 is connected to one end of the resistor R9, the cathode of the regulator D4 is connected to one end of the resistor R12 and the emitter of the transistor Q6, the collector of the transistor Q6 is connected to the other end of the resistor R14, and the other end of the resistor R12 is connected to the resistor R9, The other end of the resistor R8, the other end of the capacitor C1, the other end of the resistor R16, the other end of the resistor R1 in the receiver, and the other end of the resistor R22 in the temperature detection circuit are connected in parallel to ground.
Furthermore, the signal transmission circuit comprises a calculator and an oscillator, the calculator receives the temperature signal transmitted by the temperature detection circuit and the pressure signal transmitted by the pressure detection circuit respectively, the oscillator is started, and the oscillator generates an alarm signal and transmits the alarm signal to the ECU.
Furthermore, the calculator comprises an and gate U3A, a pin 5 of the and gate U3A is connected with the positive electrode of a voltage regulator D5 in the pressure detection circuit, a pin 7 of the and gate U3A is connected with one end of a switch S1, the other end of the switch S1 is connected with the negative electrode of a diode D1 in the temperature detection circuit, the output end of the and gate U3A is connected with the base of a triode Q7, the collector of the triode Q7 is connected with one end of a resistor R21, and the other end of the resistor R21 is respectively connected with one end of a resistor R10 in the temperature detection circuit and one end of a relay K1 in the pressure detection circuit.
Furthermore, the oscillator includes a resistor R19, one end of a resistor R19 is respectively connected to one end of a resistor R20 and an emitter of a transistor Q7 in the calculator, the other end of the resistor R19 is respectively connected to one end of a resistor R17, one end of a capacitor C2 and a collector of a transistor Q8, a base of a transistor Q8 is respectively connected to the other end of a resistor R17 and one end of a crystal Y1, the other end of a capacitor C2 is respectively connected to one end of a resistor R18 and a base of a transistor Q9, a collector of a transistor Q9 is respectively connected to the other end of a resistor R18, the other end of a resistor R20, one end of a capacitor C4 and one end of a capacitor C7, the other end of a capacitor C7 is connected to the other end of a crystal Y1, the other end of a capacitor C4 is respectively connected to one end of a capacitor C6 and one end of an inductor L1, the other end of an inductor L1 is respectively connected to one end of a variable capacitor C5 and an ECU, and the other end of a variable capacitor C5 are respectively connected to one end of a capacitor C6, The emitter of the transistor Q9, the emitter of the transistor Q8, the other end of the resistor R12 in the pressure detection circuit and the other end of the resistor R22 in the temperature detection circuit are connected in parallel and grounded.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
the temperature signal is compared with the discharge temperature signal by the operational amplifier U2B to know whether the temperature rise of the lithium battery surface is caused by the discharge of the lithium battery, the phenomenon that the lithium battery is not managed because the exact reason of the temperature rise of the lithium battery is not clear is avoided, the pressure signal of the lithium battery when the intelligent network automobile runs on a rugged road is detected by the pressure detection circuit sensor U4, the pressure signal is detected in a grading way by the triode Q3, the triode Q4 and the voltage stabilizing tube D5 in the pressure detection circuit, the safety release of the pressure signal is realized by the capacitor C1, the resistor R8, the thyristor Q5 and the resistor R9, the safety of the detection device is ensured, meanwhile, the abnormal phenomenon of the surface temperature of the lithium battery is reminded by the thyristor Q10, the oscillator is started by the AND gate U3A in the signal output circuit, so as to generate an alarm signal, the inductor L1, the capacitor C6 and the variable capacitor C5 are used for matching the impedance of the alarm signal, so that the alarm signal can be output without loss between the inductor L1, the capacitor C6 and the variable capacitor C5, and timely reminding of people in the vehicle is realized.
Drawings
Fig. 1 is a schematic diagram of a lithium battery structure in an intelligent networked automobile.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and functional aspects of the present invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In FIG. 1, 1 denotes a cathode, 2 denotes an anode, 3 denotes a cell contact, 4 denotes a separator, and 5 denotes an electrolytic cell.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides an intelligence networking car lithium cell detection device, includes ECU, is applied to the lithium cell surface of intelligence networking car, detection device includes temperature-detecting circuit, pressure detection circuit, signal transmission circuit, temperature detection circuit utilizes thermistor PTCR to detect the temperature signal on lithium cell surface, triode Q1 improves the ability of temperature signal drive back stage circuit, triode Q1 transmits the temperature signal to fortune on putting ware U1B through diode D1, utilize the temperature signal and the discharge temperature signal of resistance R13 transmission to utilize fortune putting ware U1B to compare, this when the comparison result of fortune putting ware U1B output is high level, indicate that the lithium cell has unusual heat release this moment, high level passes through diode D2 triode Q2 and switches on, triode Q2 switches on relay K1, relay K1 makes switch S1, switch S2 turn to the closed state from the off-state and switch on pressure detection circuit, and transmits the temperature signal to the signal transmission circuit, the pressure detection circuit includes a receiver and a judger, after the pressure detection circuit is conducted by the temperature detection circuit, the receiver receives the pressure signal of the lithium battery detected by the pressure detection circuit sensor U4, the pressure signal collected by the pressure detection circuit sensor U4 is transmitted to the operational amplifier U2B by the resistor R4 for following processing, the triode Q3 is also used for further improving the capability of the pressure signal to drive the subsequent stage circuit, then the pressure signal is transmitted to the judger, the judger receives the pressure signal by the triode Q3, the triode Q4 and the voltage-regulator D5 respectively, when the triode Q3 or the triode Q4 is conducted, the voltage-regulator D3 or the voltage-regulator D4 is conducted, the capacitor C1 and the resistor R8 conduct the thyristor Q5, the thyristor Q5 discharges the pressure signal to the ground by the resistor R9, meanwhile, a thyristor Q10 in the temperature detection circuit is conducted, a temperature signal is sent to an ECU to remind people in the intelligent networked automobile that the temperature of a lithium battery is abnormal, when a pressure signal conducts a voltage regulator tube D5, the voltage regulator tube D5 transmits the pressure signal to the signal transmission circuit, the signal output circuit comprises a calculator and an oscillator, the calculator calculates the pressure signal and the temperature signal by utilizing an AND gate U3A, outputs a high level to conduct the triode Q7, the oscillator starts to oscillate at the moment to generate an alarm signal, a capacitor C3 is a coupling capacitor, the alarm signal is coupled to an inductor L1, a capacitor C6 and a variable capacitor C5 to carry out impedance matching, so that the alarm signal between the ECU and the ECU can be output without loss, the alarm signal is transmitted to the ECU, the people in the automobile is reminded that the lithium battery has the possibility of threatening the safety of the intelligent networked automobile at the moment, the automobile needs to be stopped immediately to prevent the life from being threatened, the alarm signal can also be sent to other vehicles or a background to remind the other vehicles that the vehicle is dangerous;
the temperature detection circuit detects a temperature signal on the surface of the lithium battery by using the thermistor PTCR, the adjustable resistor R3 and the thermistor PTCR form a voltage division circuit, the temperature signal is a signal output to the triode Q1, the triode Q1 improves the capability of the temperature signal for driving a post-stage circuit, the triode Q1 transmits the temperature signal to the operational amplifier U1B through the diode D1, the temperature signal is compared with a discharge temperature signal transmitted by the resistor R13 by using the operational amplifier U1B, wherein the discharge temperature signal is a temperature signal when the lithium battery is normally discharged without the pressure detection circuit, when a comparison result output by the operational amplifier U1B is a low level, the lithium battery does not abnormally release heat at the moment, the low level cannot conduct the triode Q2 through the diode D2, when the comparison result output by the operational amplifier U1B is a high level, the lithium battery abnormally releases heat at the moment, at the moment, a high level conducts a triode Q2 through a diode D2, a triode Q2 conducts a relay K1, the relay K1 enables a switch S1 and a switch S2 to be changed from an open state to a closed state, a pressure detection circuit is conducted, and a temperature signal is transmitted to a signal transmission circuit, wherein a bipolar TVS tube D6 is used for accelerating generation of a comparison result, the switch S1 and the switch S2 are pin switches of the relay K1, and a resistor R10 and a capacitor C3 form a filter circuit for filtering an alternating current signal in a positive polarity power supply VCC;
the temperature detection circuit comprises a triode Q1, the base electrode of a triode Q1 is respectively connected with one end of a thermistor PTCR and the upper end of an adjustable resistor R3, the other end of the thermistor PTCR is respectively connected with one end of a resistor R10, one end of a capacitor C3, one end of a resistor R2, one end of a relay K1 and one end of a switch S2, the other end of a resistor R10 is connected with a positive power supply VCC, the collector electrode of the triode Q1 is connected with the other end of a resistor R2, the emitter electrode of a triode Q1 is respectively connected with one end of a resistor R11, the anode of a diode D1 and the anode of a thyristor Q10, the cathode of a thyristor Q10 is connected with an ECU, the other end of the resistor R11 is respectively connected with the lower end of an adjustable resistor R3, the adjustable end of an adjustable resistor R3, the other end of a capacitor C3 and one end of a resistor R22 and is grounded, the other end of a diode D1 is connected with the same phase end of an operational amplifier U1B, and the inverting end of an operational U1B is respectively connected with one end of an amplifier 13, One end of a bipolar TVS tube D6, the other end of a resistor R13 is connected with a discharge temperature signal, the output end of an operational amplifier U1B is respectively connected with the anode of a diode D2, the other end of the bipolar TVS tube D6 and the cathode of a diode D2 and is connected with the base electrode of a triode Q2, the collector of the triode Q2 is connected with the other end of a relay K1, and the emitter of a triode Q2 is connected with the other end of the resistor R22;
the pressure detection circuit comprises a receiver and a judger, after the pressure detection circuit is conducted by the temperature detection circuit, the receiver utilizes a pressure detection circuit sensor U4 to detect pressure signals inside the lithium battery to receive, the pressure detection circuit sensor U4 adopts a pressure sensor with the model similar to SYP222, the pressure signals collected by a pressure sensor U4 are transmitted to an operational amplifier U2B by a resistor R4 to be followed, a triode Q3 is also utilized to further improve the capability of the pressure signals to drive a post-stage circuit, then the pressure signals are transmitted to the judger, the judger respectively utilizes a triode Q3, a triode Q4 and a voltage stabilizing tube D5 to receive the pressure signals, when a triode Q3 is conducted, the amplitude of the pressure detection circuit of the lithium battery is indicated, the thyristor D3 is conducted by the triode Q3 at the moment, the voltage stabilizing tube D3 conducts the Q5 through a capacitor C1 and a resistor R8, the thyristor Q5 discharges the pressure signal to the ground through the resistor R9 to ensure the safety of the detection device, simultaneously, the thyristor Q10 in the temperature detection circuit is conducted, the temperature signal is sent to the ECU to remind the personnel in the intelligent network automobile that the temperature of the lithium battery is abnormal, when the triode Q4 is conducted, the amplitude of the pressure detection circuit of the lithium battery is in the range of the safe pressure detection circuit, at the moment, the triode Q4 conducts the voltage regulator tube D4, the voltage regulator tube D4 conducts the triode Q3 in the same way as the pressure signal, the thyristor Q5 is conducted through the capacitor C1 and the resistor R8, the thyristor Q5 discharges the pressure signal to the ground through the resistor R9, simultaneously, the thyristor Q10 in the temperature detection circuit is conducted, the temperature signal is sent to the ECU to remind the personnel in the intelligent network automobile that the temperature of the lithium battery is abnormal, when the pressure signal conducts the voltage regulator tube D5, the pressure change of the lithium battery of the intelligent network automobile is larger, the amplitude of the pressure signal is increased, and the voltage-stabilizing tube D5 transmits the pressure signal to the signal transmission circuit;
the receiver comprises a resistor R4, one end of a resistor R4 is connected with an out pin of a pressure detection circuit sensor U4, the other end of the resistor R4 is connected with a non-inverting end of an operational amplifier U2B, an inverting end of the operational amplifier U2B is respectively connected with one end of a resistor R15 and one end of a resistor R6, an output end of the operational amplifier U2B is connected with a base of a triode Q3, a collector of the triode Q3 is connected with one end of a resistor R5, the other end of the resistor R5 is respectively connected with a vcc pin of a pressure detection circuit sensor U4 and the other end of a switch S2 in a temperature detection circuit, an emitter of the triode Q3 is respectively connected with the other end of a resistor R15 and one end of the resistor R1, and the other end of the resistor R1 is respectively connected with the other end of a resistor R6 and a gnd pin of the pressure detection circuit sensor U4 and is connected with the ground;
the judger comprises a resistor R7, one end of a resistor R7 is respectively connected with a base electrode of a triode Q4, a base electrode of a triode Q6, an anode of a thyristor Q5, an emitting electrode of a triode Q3 in a receiver and a negative electrode of a voltage-regulator tube D5, the other end of a resistor R7 is respectively connected with an emitting electrode of a triode Q4, one end of a resistor R14 and the other end of a resistor R5 in the receiver, a collector electrode of the triode Q4 is respectively connected with one end of a resistor R16 and a negative electrode of a voltage-regulator tube D3, an anode of the voltage-regulator tube D3 is respectively connected with one end of a capacitor C1, one end of a resistor R8, a control electrode of a thyristor Q5 and a positive electrode of a voltage-regulator tube D4, a cathode of a thyristor Q5 is respectively connected with one end of a resistor R9 and a control electrode of a thyristor Q10 in a temperature detection circuit, a negative electrode of a voltage-regulator tube D4 is respectively connected with one end of a resistor R12 and an emitting electrode of a triode Q6, and a collector electrode of a resistor Q6 is connected with a collector electrode of a resistor R14, the other end of the resistor R12 is connected with the other end of the resistor R9, the other end of the resistor R8, the other end of the capacitor C1, the other end of the resistor R16, the other end of the resistor R1 in the receiver and the other end of the resistor R22 in the temperature detection circuit in parallel and connected with the ground;
the signal output circuit comprises a calculator and an oscillator, wherein the calculator receives a pressure signal transmitted by a voltage regulator tube D2 in the pressure detection circuit by using a pin 5 of an AND gate U3A, receives a temperature signal transmitted by the temperature detection circuit by using a pin 7 of the AND gate U3A, the AND gate U3A outputs high level to conduct a triode Q7, the oscillator starts oscillation at the moment to generate an alarm signal, a triode Q9 and a triode Q8 form a two-stage resistance-capacitance coupling amplification circuit, a crystal Y1 and a capacitor C5 are connected in series to form a feedback network of the two-stage resistance-capacitance coupling amplification circuit, a resistor R17 and a resistor R18 are respectively a base electrode bias resistor of the triode Q8 and a base electrode bias resistor of the triode Q9, a resistor R19 and a resistor R20 are respectively a triode Q8 and a collector load resistor of the triode Q9, the capacitor C3 is a coupling capacitor, the alarm signal is coupled to an inductor L1, a capacitor C6 and a variable capacitor C5 to realize lossless impedance matching between the ECU and the ECU, the alarm signal is transmitted to the ECU to remind people in the automobile that the lithium battery has the possibility of threatening the safety of the intelligent networked automobile at the moment, the automobile needs to be stopped immediately to prevent the life from being threatened, and the alarm signal can also be transmitted to other vehicles or a background to remind other vehicles that the automobile is dangerous;
the calculator comprises an AND gate U3A, wherein a pin 5 of the AND gate U3A is connected with the anode of a voltage regulator tube D5 in the pressure detection circuit, a pin 7 of the AND gate U3A is connected with one end of a switch S1, the other end of the switch S1 is connected with the cathode of a diode D1 in the temperature detection circuit, the output end of the AND gate U3A is connected with the base of a triode Q7, the collector of the triode Q7 is connected with one end of a resistor R21, and the other end of the resistor R21 is respectively connected with one end of a resistor R10 in the temperature detection circuit and one end of a relay K1 in the pressure detection circuit;
the oscillator comprises a resistor R19, one end of a resistor R19 is respectively connected with one end of a resistor R20 and an emitter of a triode Q7 in the calculator, the other end of a resistor R19 is respectively connected with one end of a resistor R17, one end of a capacitor C2 and a collector of a triode Q8, a base of a triode Q8 is respectively connected with the other end of a resistor R17 and one end of a crystal Y1, the other end of a capacitor C2 is respectively connected with one end of a resistor R18 and a base of a triode Q9, a collector of a triode Q9 is respectively connected with the other end of a resistor R18, the other end of a resistor R20, one end of a capacitor C4 and one end of a capacitor C7, the other end of a capacitor C7 is connected with the other end of a crystal Y1, the other end of a capacitor C4 is respectively connected with one end of a capacitor C6 and one end of an inductor L1, the other end of an inductor L1 is respectively connected with one end of a variable capacitor C5 and an ECU, the other end of a variable capacitor C5 is respectively connected with the other end of an emitter of a transistor C6 and an emitter 9, The emitter of the triode Q8, the other end of the resistor R12 in the pressure detection circuit and the other end of the resistor R22 in the temperature detection circuit are connected in parallel and grounded;
when the invention is used in concrete, the temperature detection circuit detects the temperature signal on the surface of the lithium battery by using the thermistor PTCR, the triode Q1 improves the capability of the temperature signal to drive the post-stage circuit, the triode Q1 transmits the temperature signal to the operational amplifier U1B through the diode D1, the temperature signal is compared with the discharge temperature signal transmitted by the resistor R13 by using the operational amplifier U1B, when the comparison result output by the operational amplifier U1B is high level, the abnormal heat emission of the lithium battery is indicated, the high level conducts the triode Q2 through the diode D2, the triode Q2 conducts the relay K1, the relay K1 enables the switch S1 and the switch S2 to be switched from the off state to the on state to conduct the pressure detection circuit and transmit the temperature signal to the signal transmission circuit, the pressure detection circuit comprises a receiver and a judger, after the pressure detection circuit is conducted by the temperature detection circuit, the receiver receives a pressure signal of a lithium battery detected by a pressure detection circuit sensor U4, the pressure signal collected by the pressure sensor U4 is transmitted to an operational amplifier U2B by a resistor R4 for follow-up processing, the capacity of the pressure signal for driving a post-stage circuit is further improved by a triode Q3, then the pressure signal is transmitted to a judger, the judger receives the pressure signal by a triode Q3, a triode Q4 and a voltage-stabilizing tube D5 respectively, when the triode Q3 or the triode Q4 is conducted, the voltage-stabilizing tube D3 or the voltage-stabilizing tube D4 is conducted, a capacitor C1 and a resistor R8 conduct the thyristor Q5, the thyristor Q5 discharges the pressure signal to the ground by a resistor R9, and simultaneously conducts the thyristor Q10 in the temperature detection circuit, the temperature signal is transmitted to the ECU to remind the ECU of the intelligent internet automobile personnel of abnormal temperature of the lithium battery, and when the pressure signal conducts the voltage-stabilizing tube D5, the voltage stabilizing tube D5 transmits a pressure signal to the signal transmission circuit, the signal output circuit comprises a calculator and an oscillator, the calculator calculates the pressure signal and a temperature signal by using an AND gate U3A, outputs a high level to conduct a triode Q7, and at the moment, the oscillator starts to oscillate to generate an alarm signal, a capacitor C3 is a coupling capacitor and couples the alarm signal to an inductor L1, a capacitor C6 and a variable capacitor C5 to perform impedance matching, so that the alarm signal can be output without loss between the alarm signal and the ECU, the alarm signal is transmitted to the ECU, personnel are reminded that the lithium battery at the moment has the possibility of threatening the safety of the intelligent internet automobile, the automobile needs to be stopped immediately to prevent the life from being threatened, and the alarm signal can also be transmitted to other vehicles or a background to remind other vehicles that the automobile has danger;
the temperature signal is compared with the discharge temperature signal by the operational amplifier U2B to know whether the temperature rise of the surface of the lithium battery is caused by the discharge of the lithium battery, the phenomenon that the lithium battery is not managed because the exact reason of the temperature rise of the lithium battery is not clear is avoided, the pressure signal in the lithium battery when the intelligent network automobile runs on a rugged road is detected by the pressure detection circuit sensor U4, the pressure signal is detected in a grading way by the triode Q3, the triode Q4 and the voltage stabilizing tube D5 in the pressure detection circuit, the safety release of the pressure signal is realized by the capacitor C1, the resistor R8, the thyristor Q5 and the resistor R9, the safety of the detection device is ensured, meanwhile, the abnormal phenomenon of the surface temperature of the lithium battery is reminded by the thyristor Q10, the oscillator is started by the AND gate U3A in the signal output circuit, so that an alarm signal is generated, the inductor L1, the capacitor C6 and the variable capacitor C5 are used for matching the impedance of the alarm signal, so that the alarm signal can be output without loss between the inductor L1, the capacitor C6 and the variable capacitor C5, and timely reminding of people in the vehicle is realized.
Claims (8)
1. The utility model provides an intelligence networking car lithium cell detection device, includes ECU, its characterized in that, detection device includes temperature detection circuit, pressure detection circuit, signal transmission circuit, temperature comparison circuit utilizes thermistor PTCR to detect the temperature signal on lithium cell surface and obtains the comparative result after comparing, switches on pressure detection circuit according to the comparative result to transmit temperature signal to signal output circuit, pressure detection circuit utilizes the pressure signal that vibration sensor U4 detected the lithium cell, and transmits pressure signal to signal transmission circuit behind receiver and judgement ware, signal transmission circuit utilizes temperature signal and pressure signal to produce alarm signal and transmit to ECU through calculator and oscillator.
2. The intelligent networked automobile lithium battery detection device as claimed in claim 1, wherein the temperature detection circuit detects a temperature signal on the surface of the lithium battery by using a thermistor PTCR, compares the detected temperature signal by using an operational amplifier U2B, switches on the pressure detection circuit according to a comparison result output by an operational amplifier U1B, and outputs the temperature signal to the signal transmission circuit.
3. The lithium battery detection device of an intelligent networked automobile as claimed in claim 2, wherein the temperature detection circuit comprises a transistor Q1, the base of the transistor Q1 is connected to one end of a thermistor PTCR and the upper end of an adjustable resistor R3 respectively, the other end of the thermistor PTCR is connected to one end of a resistor R10, one end of a capacitor C3, one end of a resistor R2, one end of a relay K1 and one end of a switch S2 respectively, the other end of the resistor R10 is connected to a positive power VCC, the collector of the transistor Q1 is connected to the other end of the resistor R2, the emitter of the transistor Q1 is connected to one end of the resistor R11, the anode of a diode D1 and the anode of a thyristor Q10 respectively, the cathode of the thyristor Q10 is connected to the ECU, the other end of the resistor R11 is connected to the lower end of the adjustable resistor R3, the adjustable end of the adjustable resistor R3, the other end of the capacitor C3 and one end of the resistor R22 are connected to the ground, and the other end of the diode D1 is connected to the phase-clamped end of the operational amplifier U1B, the inverting terminal of the operational amplifier U1B is connected with one end of a resistor R13 and one end of a bipolar TVS tube D6 respectively, the other end of the resistor R13 is connected with a discharge temperature signal, the output terminal of the operational amplifier U1B is connected with the anode of a diode D2, the other end of a bipolar TVS tube D6 and the cathode of a diode D2 respectively and is connected with the base of a triode Q2, the collector of the triode Q2 is connected with the other end of the relay K1, and the emitter of the triode Q2 is connected with the other end of the resistor R22.
4. The lithium battery detection device of claim 1, wherein the pressure detection circuit comprises a receiver and a determiner, the receiver receives the pressure signal of the lithium battery detected by the vibration sensor U4, and the determiner outputs the pressure signal to the signal transmission circuit according to the amplitude of the pressure signal.
5. The intelligent networked automobile lithium battery detection device as claimed in claim 4, wherein the receiver comprises a resistor R4, one end of the resistor R4 is connected with an out pin of the vibration sensor U4, the other end of the resistor R4 is connected with a non-inverting terminal of an operational amplifier U2B, an inverting terminal of the operational amplifier U2B is respectively connected with one end of a resistor R15 and one end of a resistor R6, an output terminal of the operational amplifier U2B is connected with a base of a transistor Q3, a collector of the transistor Q3 is connected with one end of a resistor R5, the other end of the resistor R5 is respectively connected with a vcc pin of the vibration sensor U4 and the other end of a switch S2 in the temperature detection circuit, an emitter of the transistor Q3 is respectively connected with the other end of the resistor R15 and one end of the resistor R1, the other end of the resistor R1 is respectively connected with the other end of the resistor R6 and a gnd pin of the vibration sensor U4 and connected in parallel to ground,
the intelligent networked automobile lithium battery detection device as claimed in claim 4, wherein the determiner comprises a resistor R7, one end of the resistor R7 is connected to the base of the transistor Q4, the base of the transistor Q6, the anode of the thyristor Q5, the emitter of the transistor Q3 in the receiver, and the cathode of the regulator D5, the other end of the resistor R7 is connected to the emitter of the transistor Q4, one end of the resistor R14, and the other end of the resistor R5 in the receiver, the collector of the transistor Q4 is connected to one end of the resistor R16 and the cathode of the regulator D3, the anode of the regulator D3 is connected to one end of the capacitor C1, one end of the resistor R8, the control electrode of the thyristor Q5, and the anode of the regulator D4, the cathode of the thyristor Q5 is connected to one end of the resistor R9, the control electrode of the thyristor Q10 in the temperature detection circuit, and the cathode of the regulator D4 is connected to one end of the resistor R12, An emitter of the triode Q6, a collector of the triode Q6 is connected with the other end of the resistor R14, the other end of the resistor R12 is connected with the other end of the resistor R9, the other end of the resistor R8, the other end of the capacitor C1, the other end of the resistor R16, the other end of the resistor R1 in the receiver and the other end of the resistor R22 in the temperature detection circuit in parallel connection and connected with the ground.
6. The intelligent networked automobile lithium battery detection device as claimed in claim 1, wherein the signal transmission circuit comprises a calculator and an oscillator, the calculator receives the temperature signal transmitted by the temperature detection circuit and the pressure signal transmitted by the pressure detection circuit respectively, starts the oscillator, and the oscillator generates an alarm signal to transmit to the ECU.
7. The intelligent networked automobile lithium battery detection device as claimed in claim 7, wherein the calculator comprises an and gate U3A, a pin 5 of the and gate U3A is connected with the anode of a voltage regulator D5 in the pressure detection circuit, a pin 7 of the and gate U3A is connected with one end of a switch S1, the other end of the switch S1 is connected with the cathode of a diode D1 in the temperature detection circuit, the output end of the and gate U3A is connected with the base of a transistor Q7, the collector of the transistor Q7 is connected with one end of a resistor R21, and the other end of the resistor R21 is respectively connected with one end of a resistor R10 in the temperature detection circuit and one end of a relay K1 in the pressure detection circuit.
8. The intelligent networked automobile lithium battery detection device as claimed in claim 7, wherein the oscillator comprises a resistor R19, one end of a resistor R19 is connected to one end of a resistor R20 and an emitter of a transistor Q7 in the calculator, the other end of the resistor R19 is connected to one end of a resistor R17, one end of a capacitor C2 and a collector of a transistor Q8, a base of the transistor Q8 is connected to the other end of a resistor R17 and one end of a crystal Y1, the other end of the capacitor C2 is connected to one end of the resistor R18 and a base of a transistor Q9, a collector of the transistor Q9 is connected to the other end of the resistor R18, the other end of the resistor R20, one end of the capacitor C4 and one end of a capacitor C7, the other end of a capacitor C7 is connected to the other end of the crystal Y1, the other end of the capacitor C4 is connected to one end of a capacitor C6, one end of an inductor L1, and the other end of the inductor L1 is connected to one end of a variable capacitor C5 And the other end of the variable capacitor C5 of the ECU is respectively connected with the other end of the capacitor C6, the emitter of the triode Q9, the emitter of the triode Q8, the other end of the resistor R12 in the pressure detection circuit and the other end of the resistor R22 in the temperature detection circuit in parallel connection and connected with the ground.
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| CN202110592789.4A CN113267219A (en) | 2021-05-28 | 2021-05-28 | Intelligent network-connected automobile lithium battery detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113451992A (en) * | 2021-09-02 | 2021-09-28 | 江西影创信息产业有限公司 | MR glasses power supply protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113451992A (en) * | 2021-09-02 | 2021-09-28 | 江西影创信息产业有限公司 | MR glasses power supply protection circuit |
| CN113451992B (en) * | 2021-09-02 | 2021-11-16 | 江西影创信息产业有限公司 | MR glasses power supply protection circuit |
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