CN113342089A - High-precision low-cost storage battery autonomous temperature control circuit - Google Patents

High-precision low-cost storage battery autonomous temperature control circuit Download PDF

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Publication number
CN113342089A
CN113342089A CN202110461095.7A CN202110461095A CN113342089A CN 113342089 A CN113342089 A CN 113342089A CN 202110461095 A CN202110461095 A CN 202110461095A CN 113342089 A CN113342089 A CN 113342089A
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storage battery
temperature control
resistor
control circuit
temperature
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Inventor
杨依衡
王嘉靖
毕林杰
汪嵩
王君召
谢霞明
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Shanghai Institute of Space Power Sources
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Shanghai Institute of Space Power Sources
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Priority to CN202110461095.7A priority Critical patent/CN113342089A/en
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Temperature (AREA)

Abstract

A high-precision low-cost storage battery autonomous temperature control circuit comprises a hysteresis comparator, a thermistor, a temperature control lower threshold debugging circuit, a temperature control upper threshold debugging circuit and a heating control circuit. The thermistor converts the temperature of the storage battery into a voltage signal which is connected with the positive input end of the hysteresis comparator; the temperature control lower threshold debugging circuit for calibrating the temperature control lower threshold voltage of the storage battery is connected to the reverse input end of the hysteresis comparator, and the output end of the hysteresis comparator is connected with the heating control circuit through the temperature control upper threshold debugging circuit for calibrating the temperature control upper threshold voltage of the storage battery. When the temperature of the storage battery is lower than the temperature control lower limit threshold voltage, the level of the positive input end of the hysteresis comparator is increased, an effective level is output to the heating control circuit, and the storage battery is heated by the heating control circuit; when the temperature of the storage battery is higher than the temperature control upper limit threshold voltage, the output of the hysteresis comparator is invalid, and the heating control circuit stops heating the storage battery.

Description

High-precision low-cost storage battery autonomous temperature control circuit
Technical Field
The invention belongs to the technical field of space power supplies, and particularly relates to an automatic temperature control circuit of a lithium ion storage battery for a spacecraft.
Background
The performance of the lithium ion storage battery is greatly influenced by temperature, and in order to ensure that the lithium ion storage battery has stable charging and discharging capacity during working, the temperature of the lithium ion storage battery is generally and accurately controlled in engineering.
In a spacecraft, a lower computer is generally used for collecting a temperature signal of a storage battery and sending a command for controlling the heating band-pass and power-off according to the temperature signal. However, for some small single machines, configuring their lower machines individually for controlling the battery temperature can significantly increase the development cost.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the high-precision low-cost storage battery automatic temperature control circuit is provided, the circuit comprises a resistor, a capacitor, a diode, a triode, a MOSFET, a comparator and the like, components are low in cost and are common components in engineering, the product manufacturing is facilitated, and the cost of storage battery temperature control is reduced.
The technical solution of the invention is as follows:
a high-precision low-cost automatic temperature control circuit for storage battery comprises a hysteresis comparator U1Thermistor RTA temperature control lower threshold debugging circuit, a temperature control upper threshold debugging circuit, a heating control circuit, a thermistor RTThe temperature change of the storage battery is sensed in real time, the temperature is converted into a voltage signal and the voltage signal is connected to a hysteresis comparator U1The positive input terminal of (1); a temperature control lower threshold debugging circuit for calibrating the temperature control lower threshold voltage of the storage battery is connected to the hysteresis comparator U1The inverting input terminal of the hysteresis comparator U1The output end of the voltage regulator is used for calibrating the temperature control upper limit threshold voltage of the storage batteryThe threshold debugging circuit is connected with the heating control circuit; when the temperature of the storage battery is lower than the temperature control lower limit threshold voltage, the hysteresis comparator U1The level of the positive input end is increased, an effective level is output to the heating control circuit, and the heating control circuit heats the storage battery; when the temperature of the storage battery is higher than the temperature control upper limit threshold voltage, the hysteresis comparator U1The output of (1) is invalid, and the heating control circuit stops heating the storage battery.
The heating control circuit comprises a heating belt and a driving triode V1MOS transistor Q for power distribution1And a pull-up resistor Rs1Driving triode V1The base electrode of the transistor is connected with the output of the upper threshold debugging circuit of the temperature control to drive the triode V1The emitting electrode is simultaneously connected with the heating belt and the negative electrode of the storage battery to drive the triode V1Collector and distribution MOS tube Q1Is connected with the grid electrode of the power distribution MOS tube Q1The source electrode and the drain electrode of the capacitor are respectively connected with the heating belt and the anode of the storage battery, and a pull-up resistor Rs1One end of the pull-up resistor R is connected with the anode of the storage batterys1The other end of the delay comparator U is connected with the delay comparator U at the same time1And a positive input end, the heating tape being adhered to the battery body.
The temperature control lower threshold debugging circuit comprises a divider resistor Rf3A voltage dividing resistor Rf4A voltage dividing resistor Rf5Wherein a voltage dividing resistor Rf4And a voltage dividing resistor Rf5The first common terminal after parallel connection is connected with the negative electrode of the storage battery, and the second common terminal after parallel connection is connected with the divider resistor Rf3One end of (1), a voltage dividing resistor Rf3The other end of the comparator is connected with a hysteresis comparator U1And through a voltage dividing resistor Rf2And is connected with the anode of the storage battery.
The upper threshold debugging circuit for temperature control comprises a driving resistor Rq1And a driving resistor Rq2And a driving resistor Rq3Wherein a driving resistor Rq2And a driving resistor Rq1The first common terminal after parallel connection is connected with a hysteresis comparator U1The second common terminal after parallel connection is connected with the driving resistor Rq3One terminal of (1), drive resistor Rq3The other end of the driving triode V is connected with1The base of (1).
A current limiting resistor R is also connected in series between the temperature control upper threshold debugging circuit and the heating control circuitx2And a low voltage shielding diode D1Low voltage shielded diode D1When the heating control circuit is conducted in the forward direction, the temperature control upper threshold debugging circuit is conducted with the heating control circuit.
The driven resistor Rq1And a driving resistor Rq2And a driving resistor Rq3The equivalent resistance of the series-parallel network is larger than the current limiting resistance Rx2The resistance value of (c).
The thermistor RTIs a negative temperature coefficient thermistor.
The thermistor RTOne end of the thermistor is connected with the negative electrode of the storage batteryTThe other end of the voltage divider passes through a voltage dividing resistor Rf1Connected to the positive electrode of the accumulator, thermistor RTAnd the other end of the same is also connected to the positive input terminal of the comparator U1.
Compared with the prior art, the invention has the advantages that:
(1) the circuit of the invention comprises a resistor, a capacitor, a diode, a triode, a MOSFET, a comparator and the like, and the components have low cost, are all common components in engineering, are beneficial to product manufacture, and reduce the cost of temperature control of the storage battery;
(2) the circuit calibrates the upper limit threshold and the lower limit threshold of the temperature control of the storage battery through the equivalent resistance of the divider resistor, can realize accurate temperature control only by changing the resistance of the resistor during debugging, and has high temperature control accuracy.
Drawings
FIG. 1 is a basic schematic diagram of the circuit of the present invention;
FIG. 2 is an equivalent circuit diagram of the comparator according to the present invention looking into the input terminal of the circuit when the output terminal is at a low level;
FIG. 3 is an equivalent circuit diagram of the comparator of the present invention looking into the circuit input when the output is high (neglecting the tube voltage drop);
FIG. 4 is a schematic diagram of the temperature hysteresis interval of the present invention.
Detailed Description
The high-precision low-cost battery autonomous temperature control circuit of the present invention will be described in further detail with reference to fig. 1 to 4 of the specification.
As shown in figure 1, the high-precision low-cost storage battery automatic temperature control circuit has the input end connected with a storage battery with controlled temperature, the output end connected with a heating belt, and the heating belt is adhered to a storage battery body.
A high-precision low-cost automatic temperature control circuit for storage battery comprises a hysteresis comparator U1Thermistor RTA temperature control lower threshold debugging circuit, a temperature control upper threshold debugging circuit, a heating control circuit, a thermistor RTThe temperature change of the storage battery is sensed in real time, the temperature is converted into a voltage signal and the voltage signal is connected to a hysteresis comparator U1The positive input terminal of (1); a temperature control lower threshold debugging circuit for calibrating the temperature control lower threshold voltage of the storage battery is connected to the hysteresis comparator U1The inverting input terminal of the hysteresis comparator U1The output end of the temperature sensor is connected with the heating control circuit through a temperature control upper threshold debugging circuit for calibrating the temperature control upper threshold voltage of the storage battery; when the temperature of the storage battery is lower than the temperature control lower limit threshold voltage, the hysteresis comparator U1The level of the positive input end is increased, an effective level is output to the heating control circuit, and the heating control circuit heats the storage battery; when the temperature of the storage battery is higher than the temperature control upper limit threshold voltage, the hysteresis comparator U1The output of (1) is invalid, and the heating control circuit stops heating the storage battery.
The heating control circuit comprises a heating belt and a driving triode V1MOS transistor Q for power distribution1And a pull-up resistor Rs1Driving triode V1The base electrode of the transistor is connected with the output of the upper threshold debugging circuit of the temperature control to drive the triode V1The emitting electrode is simultaneously connected with the heating belt and the negative electrode of the storage battery to drive the triode V1Collector and distribution MOS tube Q1Is connected with the grid electrode of the power distribution MOS tube Q1The source electrode and the drain electrode of the capacitor are respectively connected with the heating belt and the anode of the storage battery, and a pull-up resistor Rs1One end of the pull-up resistor R is connected with the anode of the storage batterys1The other end of the delay comparator U is connected with the delay comparator U at the same time1Output terminal of (1) andtowards the input end, the heating tape is adhered to the battery body.
The temperature control lower threshold debugging circuit comprises a divider resistor Rf3A voltage dividing resistor Rf4A voltage dividing resistor Rf5Wherein a voltage dividing resistor Rf4And a voltage dividing resistor Rf5The first common terminal after parallel connection is connected with the negative electrode of the storage battery, and the second common terminal after parallel connection is connected with the divider resistor Rf3One end of (1), a voltage dividing resistor Rf3The other end of the comparator is connected with a hysteresis comparator U1And through a voltage dividing resistor Rf2And is connected with the anode of the storage battery.
The upper threshold debugging circuit for temperature control comprises a driving resistor Rq1And a driving resistor Rq2And a driving resistor Rq3Wherein a driving resistor Rq2And a driving resistor Rq1The first common terminal after parallel connection is connected with a hysteresis comparator U1The second common terminal after parallel connection is connected with the driving resistor Rq3One terminal of (1), drive resistor Rq3The other end of the driving triode V is connected with1The base of (1).
A current limiting resistor R is also connected in series between the temperature control upper threshold debugging circuit and the heating control circuitx2And a low voltage shielding diode D1Low voltage shielded diode D1When the heating control circuit is conducted in the forward direction, the temperature control upper threshold debugging circuit is conducted with the heating control circuit.
The driven resistor Rq1And a driving resistor Rq2And a driving resistor Rq3The equivalent resistance of the series-parallel network is larger than the current limiting resistance Rx2The resistance value of (c).
The thermistor RTIs a negative temperature coefficient thermistor.
The thermistor RTOne end of the thermistor is connected with the negative electrode of the storage batteryTThe other end of the voltage divider passes through a voltage dividing resistor Rf1Connected to the positive electrode of the accumulator, thermistor RTAnd the other end of the same is also connected to the positive input terminal of the comparator U1.
Comparator U1Thermistor RTDivider resistor Rf1、Rf2、Rf3、Rf4、Rf5Retardation resistance Rc1、Rc2Current limiting resistor Rx1、Rx2Pull-up resistor Rs1And a driving resistor Rq1、Rq2、Rq3、Rq4、Rq5、Rq6Filter capacitor C1Low voltage shielded diode D1Driving triode V1Distribution MOS transistor Q1And (4) forming. All the components are economical and commonly used, so the cost of the circuit is low.
The circuit topology is designed based on a hysteresis comparator, and a debugging resistor for debugging upper and lower thresholds in a temperature hysteresis interval is introduced.
Rf3、Rf4、Rf5Lower threshold, R, for debugging temperature hysteresis intervalq1、Rq2、Rq3And the upper threshold is used for debugging the temperature hysteresis interval. When the output end of the comparator is at low level, the diode D1Cutting off, cutting off the power of the heating belt until the temperature is reduced to be less than the lower threshold value, and preventing the positive end voltage of the comparator from being influenced by Rq1、Rq2、Rq3The influence of (c). When the temperature is reduced to be less than the lower threshold value, the differential pressure of the positive end and the negative end of the comparator is changed from negative to positive, the outlet end is converted into high level, and the diode D1Conducting, electrifying the heating belt until the temperature is higher than the upper threshold, wherein the voltage of the positive end of the comparator is Rq1、Rq2、Rq3The influence of (c). Thus, in regulating Rf3、Rf4、Rf5Adjusting R on the basis of determining the lower threshold of the temperature hysteresis intervalq1、Rq2、Rq3The upper threshold of the temperature hysteresis interval can be adjusted on the basis of not influencing the lower threshold, and accurate temperature control is facilitated.
Resistance Rf2One end is connected with the positive electrode of the storage battery, and the other end is simultaneously connected with the negative end of the comparator and Rf3、Rf4、Rf5The other end of the series-parallel network is connected with the negative pole of the storage battery. Rf3、Rf4、Rf5The connection mode of the series-parallel network is as follows: rf4、Rf5After being connected in parallel with Rf3Are connected in series.Furthermore, Rf1One end of the negative temperature coefficient thermistor is connected with the positive end of the storage battery, and the other end of the negative temperature coefficient thermistor is simultaneously connected with the positive end of the comparator and the negative temperature coefficient thermistor RTThermistor RTThe other end of the connecting rod is connected with a negative pole of the storage battery.
Comparator U1The outlet end passes through a current limiting resistor Rx2Rear-connected low-voltage shielding diode D1Anode of (D)1Cathode of (2) is connected with Rq1、Rq2、Rq3The other end of the series-parallel network is simultaneously connected with the base electrode of the triode V1 and the driving resistor Rq4One end of (A) Rq4The other end of the connecting rod is connected with a negative pole of the storage battery. Rq1、Rq2、Rq3The connection mode of the series-parallel network is as follows: rq1、Rq2After being connected in parallel with Rq3Are connected in series.
When the circuit component is selected, firstly, according to the upper and lower thresholds of the expected temperature control point, the temperature-resistance value relation of the thermistor, the equivalent circuit when the comparator outputs low/high level and the like, the R is preliminarily determinedf3、Rf4、Rf5、Rq1、Rq2、Rq3So that the following effects are theoretically achieved: when the output end of the comparator is inverted from a low level to a high level, the temperature value is just the expected lower threshold; when the output end of the comparator is inverted from a high level to a low level, the temperature value is just the expected upper threshold. Then, the circuit is actually measured, if the output end of the comparator is turned from low level to high level, the temperature value is less than the expected lower threshold, then Rf is adjusted downwards3、Rf4、Rf5The equivalent resistance of the series-parallel network. Otherwise, the equivalent resistance is adjusted up. If the output end of the comparator is inverted from the high level to the low level and the temperature value is larger than the expected upper threshold, the R is adjusted downwardsq1、Rq2、Rq3The equivalent resistance of the series-parallel network. Otherwise, the equivalent resistance is adjusted up.
Rc1、Rc2Is an integral part of a typical hysteresis comparator; rx1For limiting the supply current to the comparator;
Rq4through reaction with Rs1、Rq1、Rq2、Rq3Component resistance network voltage divisionProviding bias voltage for turning on the triode V1; rq5、Rq6A bias voltage is provided to turn on Q1 by voltage division.
The specific working process of the circuit of the invention is as follows:
when the output end of the comparator U1 is at low level, the diode D1When the equivalent circuit is cut off and viewed from the input port of the circuit, as shown in FIG. 2, the voltage at the positive terminal of the comparator U1 is Rf1、RT、Rc1、Rc2、Rs1、Rx2Is not affected by Rq1、Rq2、Rq3The influence of (c). The thermistor R is used as the temperature of the storage battery is reducedTThe resistance increases and the voltage at the positive terminal of comparator U1 increases. When the temperature is reduced to be less than the lower threshold value, the differential pressure of the positive end and the negative end of the comparator U1 is changed from negative to positive, the outlet end is converted into high level, and the diode D1Conducting triode V1And conducting, and electrifying the heating belt. At this time Rx2The equivalent circuit, which can be considered floating, looking into the input port of the circuit is shown in fig. 3 (ignoring the pipe drop). The voltage of the positive terminal of the comparator U1 is still subjected to Rf1、RT、Rc1、Rc2、Rs1Is no longer influenced by Rx2Is in turn influenced by Rq1、Rq2、Rq3The influence of (c). Due to Rq1、Rq2、Rq3The equivalent resistance value of the series-parallel network is greater than Rx2The voltage at the positive terminal of the comparator will rise instantaneously. As the electrifying time of the heating belt increases, the temperature of the storage battery rises, and the thermistor RTThe resistance value decreases and the positive terminal voltage of the comparator U1 decreases. When the temperature rises to be larger than the upper threshold value, the voltage of the positive end and the negative end of the comparator U1 changes from positive to negative, and the output end is switched to low level.
Examples
Circuit connections see FIG. 1, Rq1、Rq2、Rq3The equivalent resistance of the series-parallel network is required to be greater than Rx2. The thermistor selects MF501 with negative temperature coefficient, resistor Rf1、Rf2Taking a value of 10kohm, Rf3、Rf4、Rf5Respectively takes the values of 0ohm, 51kohm and 7.5kohm, Rc1、Rc2Are respectively 16kohm and 36kohm, Rx1、Rx2Is 100ohm, Rq1、Rq2、Rq3Respectively 0ohm, 1kohm, Rq4100kohm, capacitance 0.5 uf.
By selecting the above-mentioned resistance capacitance value, the following effects can be achieved:
when the output end of the comparator is at low level, the diode D1And (6) cutting off. At this time, the equivalent circuit viewed from the circuit input is as shown in fig. 2. The temperature is gradually reduced, when the temperature is reduced to less than 0.5 ℃, the output end of the comparator is converted into high level, and the diode D1Conducting triode V1And conducting, and electrifying the heating belt. At this time, the equivalent circuit viewed from the circuit input is as shown in fig. 3. Due to Rq1、Rq2、Rq3The equivalent resistance of the series-parallel network is greater than Rx2The voltage at the positive terminal of the comparator rises instantaneously. The temperature of the storage battery is gradually increased, when the temperature is increased to be more than 10 ℃, the differential pressure of the positive end and the negative end of the comparator U1 is changed from positive to negative, the outlet end is converted into low level, D1And cutting off the heating belt. The schematic diagram of the temperature hysteresis interval obtained by the circuit is shown in fig. 4.
By regulating Rf3、Rf4、Rf5And after the equivalent resistance value of the series-parallel network determines the lower threshold value of the hysteresis interval. Up-regulation of Rq1、Rq2、Rq3The equivalent resistance of the series-parallel network can increase the upper threshold value of the temperature hysteresis interval. Conversely, the upper threshold of the temperature hysteresis interval may be decreased.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.

Claims (8)

1. The utility model provides a high accuracy low-cost battery is from accuse temperature circuit which characterized in that: comprising a hysteresis comparator U1Thermistor RTA temperature control lower threshold debugging circuit, a temperature control upper threshold debugging circuit, a heating control circuit, a thermistor RTThe temperature change of the storage battery is sensed in real time, the temperature is converted into a voltage signal and the voltage signal is connected to a hysteresis comparator U1The positive input terminal of (1); for signA temperature control lower threshold debugging circuit for determining the temperature control lower threshold voltage of the storage battery is connected to the hysteresis comparator U1The inverting input terminal of the hysteresis comparator U1The output end of the temperature sensor is connected with the heating control circuit through a temperature control upper threshold debugging circuit for calibrating the temperature control upper threshold voltage of the storage battery; when the temperature of the storage battery is lower than the temperature control lower limit threshold voltage, the hysteresis comparator U1The level of the positive input end is increased, an effective level is output to the heating control circuit, and the heating control circuit heats the storage battery; when the temperature of the storage battery is higher than the temperature control upper limit threshold voltage, the hysteresis comparator U1The output of (1) is invalid, and the heating control circuit stops heating the storage battery.
2. The high-precision low-cost storage battery automatic temperature control circuit according to claim 1, characterized in that: the heating control circuit comprises a heating belt and a driving triode V1MOS transistor Q for power distribution1And a pull-up resistor Rs1Driving triode V1The base electrode of the transistor is connected with the output of the upper threshold debugging circuit of the temperature control to drive the triode V1The emitting electrode is simultaneously connected with the heating belt and the negative electrode of the storage battery to drive the triode V1Collector and distribution MOS tube Q1Is connected with the grid electrode of the power distribution MOS tube Q1The source electrode and the drain electrode of the capacitor are respectively connected with the heating belt and the anode of the storage battery, and a pull-up resistor Rs1One end of the pull-up resistor R is connected with the anode of the storage batterys1The other end of the delay comparator U is connected with the delay comparator U at the same time1And a positive input end, the heating tape being adhered to the battery body.
3. The high-precision low-cost storage battery automatic temperature control circuit according to claim 2, characterized in that: the temperature control lower threshold debugging circuit comprises a divider resistor Rf3A voltage dividing resistor Rf4A voltage dividing resistor Rf5Wherein a voltage dividing resistor Rf4And a voltage dividing resistor Rf5The first common terminal after parallel connection is connected with the negative electrode of the storage battery, and the second common terminal after parallel connection is connected with the divider resistor Rf3One end of (1), a voltage dividing resistor Rf3The other end of the comparator is connected with a hysteresis comparator U1And through a voltage dividing resistor Rf2And is connected with the anode of the storage battery.
4. The high-precision low-cost storage battery automatic temperature control circuit according to claim 2, characterized in that: the upper threshold debugging circuit for temperature control comprises a driving resistor Rq1And a driving resistor Rq2And a driving resistor Rq3Wherein a driving resistor Rq2And a driving resistor Rq1The first common terminal after parallel connection is connected with a hysteresis comparator U1The second common terminal after parallel connection is connected with the driving resistor Rq3One terminal of (1), drive resistor Rq3The other end of the driving triode V is connected with1The base of (1).
5. The high-precision low-cost storage battery automatic temperature control circuit according to claim 4, characterized in that: a current limiting resistor R is also connected in series between the temperature control upper threshold debugging circuit and the heating control circuitx2And a low voltage shielding diode D1Low voltage shielded diode D1When the heating control circuit is conducted in the forward direction, the temperature control upper threshold debugging circuit is conducted with the heating control circuit.
6. The high-precision low-cost storage battery automatic temperature control circuit according to claim 5, characterized in that: the driven resistor Rq1And a driving resistor Rq2And a driving resistor Rq3The equivalent resistance of the series-parallel network is larger than the current limiting resistance Rx2The resistance value of (c).
7. The high-precision low-cost storage battery automatic temperature control circuit according to claim 1, characterized in that: the thermistor RTIs a negative temperature coefficient thermistor.
8. The high-precision low-cost storage battery automatic temperature control circuit according to claim 1, characterized in that: the thermistor RTOne end of the thermistor is connected with the negative electrode of the storage batteryTThe other end of the voltage divider passes through a voltage dividing resistor Rf1Connected to the positive electrode of the accumulator, thermistor RTAnd the other end of the same is also connected to the positive input terminal of the comparator U1.
CN202110461095.7A 2021-04-27 2021-04-27 High-precision low-cost storage battery autonomous temperature control circuit Pending CN113342089A (en)

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CN209625069U (en) * 2019-04-23 2019-11-12 河南平原光电有限公司 A kind of temperature control circuit
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Publication number Priority date Publication date Assignee Title
CN207116629U (en) * 2017-08-17 2018-03-16 深圳中兴力维技术有限公司 Battery heater circuit and integrated battery
CN109375675A (en) * 2018-12-18 2019-02-22 国网西藏电力有限公司 A kind of constant temperature controller helping field equipment in arctic operation
CN209625069U (en) * 2019-04-23 2019-11-12 河南平原光电有限公司 A kind of temperature control circuit
CN111211361A (en) * 2020-01-07 2020-05-29 福建科立讯通信有限公司 Circuit for improving low-temperature performance of common battery

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Application publication date: 20210903