CN111211377B - System and method for monitoring temperature of cylindrical lithium ion battery - Google Patents
System and method for monitoring temperature of cylindrical lithium ion battery Download PDFInfo
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- CN111211377B CN111211377B CN202010040901.9A CN202010040901A CN111211377B CN 111211377 B CN111211377 B CN 111211377B CN 202010040901 A CN202010040901 A CN 202010040901A CN 111211377 B CN111211377 B CN 111211377B
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 144
- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 239000000523 sample Substances 0.000 claims description 42
- 239000003292 glue Substances 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 15
- 238000005485 electric heating Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 210000000056 organ Anatomy 0.000 description 4
- 239000000565 sealant Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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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
- H01M10/60—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
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
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- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a system and a method for monitoring temperature of a cylindrical lithium ion battery, belonging to the field of lithium batteries. The utility model provides a system and method of cylinder type lithium ion battery monitoring temperature, including lithium ion battery body and the control module who locates in lithium ion battery body, the comparison module, the temperature detection module, temperature control module and alarm module, lithium ion battery body includes the battery steel casing and sets firmly the book core in the battery steel casing, the comparison module, the temperature detection module, temperature control module and alarm module all with control module signal connection, the comparison module is used for comparing the outside of lithium ion battery body and the inside temperature difference information that the temperature detection module shows, the temperature detection module is used for detecting the inside temperature of lithium ion battery body and outside temperature, can realize carrying out real time monitoring and accurate measurement to the inside and outside temperature of battery in the battery carries out charge-discharge process, improve lithium ion battery's safety in utilization.
Description
Technical Field
The invention relates to the field of lithium batteries, in particular to a system and a method for monitoring temperature of a cylindrical lithium ion battery.
Background
Lithium ion batteries are increasingly being used because of their high energy density, long cycle life, and environmental friendliness. Its shadow appears in various fields such as electric automobile, electric bicycle, cell-phone, energy storage and 3C digit.
With the wide use of lithium batteries, safety accidents caused by the lithium batteries are more and more concerned by people, and the fear of consumers is caused. In this case, the safety performance of the lithium ion battery becomes the most interesting performance in the production process of the lithium ion battery. Although the lithium ion battery has high energy density, the lithium ion battery is easy to generate heat in the charging and discharging processes, the heat is mainly generated by physical heating and chemical reaction caused by the self resistance of the battery, the heat can be accumulated together under certain conditions, and if the heat is accumulated for a long time and is not released in time, the battery can be overheated, so that the electrical property and the safety performance of the battery are influenced.
How to monitor the temperature inside the lithium ion battery becomes the most important factor in producing the lithium ion battery, the common method for measuring the temperature of the battery is to measure the surface temperature of the battery in the safety test process (such as overcharge, short circuit and extrusion) so as to measure whether the battery reaches the corresponding safety standard or use a thermal imager to monitor the temperature change of the lithium ion battery in the charge and discharge process, and the measurement error of the method is large and cannot represent the real temperature and temperature change inside the battery, so that the development of the safety research of the lithium ion battery is restricted. In addition, the battery parts are not good conductors of temperature, and hysteresis in heat conduction is present, which is also disadvantageous for safety research of lithium ion batteries.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a system and a method for monitoring the temperature of a cylindrical lithium ion battery, which can realize real-time monitoring and accurate measurement of the internal and external temperatures of the battery in the process of charging and discharging the battery and improve the use safety of the lithium ion battery.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A system and a method for monitoring the temperature of a cylindrical lithium ion battery comprise a lithium ion battery body, and a control module, a comparison module, a temperature detection module, a temperature control module and an alarm module which are arranged in the lithium ion battery body, wherein the lithium ion battery body comprises a battery steel shell and a roll core fixedly arranged in the battery steel shell, the comparison module, the temperature detection module, the temperature control module and the alarm module are all in signal connection with the control module, the comparison module is used for comparing the temperature difference information outside and inside the lithium ion battery body displayed by the temperature detection module, the temperature detection module is used for detecting the temperature inside and outside the lithium ion battery body, the temperature control module is used for heating and cooling the lithium ion battery body, the alarm module is used for generating early warning signals to the temperature control module with faults, the real-time monitoring and accurate measurement of the internal and external temperatures of the battery can be realized in the charging and discharging process of the battery, and the use safety of the lithium ion battery is improved.
Further, the temperature detection module comprises at least three first temperature probes and at least three second temperature probes, the upper end of the winding core is provided with a mounting hole in a chiseled way, the three first temperature probes are all bonded in the mounting hole, and are uniformly distributed at the upper part, the middle part and the lower part in the mounting hole, a plurality of second temperature probes are respectively attached at the upper part, the middle part and the lower part of the outer wall of the battery steel shell, the first temperature probe and the second temperature probe are respectively arranged at a plurality of different positions in the winding core and outside the battery steel shell, can monitor the temperature difference information between the inside and the outside of the lithium ion battery body, and can also monitor the internal and the external temperature change conditions when the charging and discharging circulation is carried out under different multiplying powers, and furthermore, the temperature of each position inside and outside the lithium ion battery body can be integrated to obtain the approximate temperature change conditions inside and outside the lithium ion battery body, and the generated deviation is small.
Furthermore, the mounting hole is formed in the central line of the winding core, so that the first temperature probe can be mounted in the central position of the winding core, and the actual temperature inside the winding core can be monitored and measured more accurately.
Furthermore, be located first temperature probe in the mounting hole and the equal one-to-one in second temperature probe quantity and position that are located the battery box hat make the battery box hat outer and roll up the same position department in the core and all be equipped with first temperature probe and second temperature probe, and then make this internal and external temperature contrast effect of lithium ion battery better.
Furthermore, the upper and lower open ends of the mounting hole are coated with Kafter glue, the surface of the Kafter glue is coated with glue, the Kafter glue is a sealant which can be quickly bonded, has excellent insulativity and good bonding property, is moisture-proof, shock-resistant, corona-resistant and leakage-resistant, has excellent cold and hot alternation resistance after being cured, and enables the interior of the lithium ion battery body to be completely isolated from the exterior in the charging and discharging process under the sealing effect of the double-layer glue, so that the measurement of the internal temperature of the lithium ion battery body is more accurate.
Furthermore, the temperature control module comprises a radiating fin and an electrothermal film which are fixedly arranged in the lithium ion battery body, the temperature difference inside and outside the lithium ion battery body is 6-8 ℃, and when the internal temperature of the lithium ion battery body reaches to be higher than 25 ℃, the radiating fin is started to cool the lithium ion battery body, the temperature difference inside and outside the lithium ion battery body is 6-8 ℃, and when the internal temperature of the lithium ion battery body reaches to be lower than 10 ℃, the electrothermal film is started to heat the lithium ion battery body, so that when the internal temperature of the battery steel shell is too high, the radiating fin can be started to rapidly dissipate the heat accumulated in the battery steel shell, and when the temperature is too low, the electrothermal film can be started to heat the winding core, so that the charging and discharging capacity is not easily influenced by supercooling, and the temperature control module always works at the.
Further, alarm module is including installing the bee calling organ on the battery box hat outer wall, when temperature control module broke down or this internal temperature that detects of lithium ion battery when reaching a definite value, the bee calling organ sounded, and the notice staff or user carry out the breakdown maintenance and cut off lithium ion battery body circuit and make the lithium ion battery body stop to heat up continuously.
Further, a system for monitoring the temperature of a cylindrical lithium ion battery comprises the following steps:
s1, the temperature detection module detects the temperature information inside and outside the lithium ion battery body and the temperature information at different positions inside and outside the lithium ion battery body, and then transmits the information to the control module;
s2, the control module transmits the information to the comparison module, the comparison module feeds the information back to the control module after comparing the temperature information, and the control module controls the electric heating film or the radiating fin in the temperature control module to start;
s21, when the comparison module detects that the highest temperature information value is lower than 10 ℃ and the temperature difference between the inside and the outside of the lithium ion battery body reaches 6-8 ℃, feeding the information back to the control module, controlling the electric heating film in the temperature control module to start, heating the lithium ion battery body until the temperature detection module detects that the temperature in the lithium ion battery body reaches 16 ℃, feeding the signal back to the control module, and controlling the electric heating film in the temperature control module to stop starting by the control module;
s22, when the comparison module detects that the highest temperature information value reaches to be higher than 25 ℃ and the difference between the internal temperature and the external temperature of the lithium ion battery body reaches 6-8 ℃, feeding the information back to the control module, controlling the starting of a radiating fin in the temperature control module by the control module, carrying out radiating operation on the lithium ion battery body until the temperature detection module detects that the internal temperature of the lithium ion battery body reaches 18 ℃, feeding the signal back to the control module, and controlling the radiating fin in the temperature control module by the control module to stop starting;
and S31, when the temperature detected by the temperature detection module and the temperature control module do not change much before the temperature control module is started after the temperature control module heats or dissipates the heat of the lithium ion battery body, transmitting the signal to the control module, and controlling the alarm module to start by the control module.
And S32, when the temperature detection module detects that the temperature in the lithium ion battery body is higher than a certain value, the signal is transmitted to the control module, and the control module controls the alarm module to start and send out an alarm signal.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme can realize real-time monitoring and accurate measurement of the internal and external temperatures of the battery in the charging and discharging process of the battery, and improves the use safety of the lithium ion battery.
(2) The temperature detection module comprises at least three first temperature probes and second temperature probes, the mounting hole is formed in the upper end of the winding core, the three first temperature probes are all bonded in the mounting hole, the first temperature probes are uniformly distributed on the upper portion in the mounting hole, the middle portion and the lower portion are located, the second temperature probes are respectively attached to the upper portion of the outer wall of the battery steel shell, the middle portion and the lower portion are located, the first temperature probes and the second temperature probes are respectively arranged in the winding core and at a plurality of different positions outside the battery steel shell, the temperature difference information inside and outside the lithium ion battery body can be monitored, the internal and external temperature change conditions during charge and discharge circulation can be monitored under different multiplying powers, the internal and external approximate temperature change conditions can be known through the temperature inside and outside the lithium ion battery body, and the generated deviation is small.
(3) The mounting hole is opened in the central line position department of rolling up the core, can make first temperature probe install in the central point department of rolling up the core, and then can more accurate monitoring and measure the inside actual temperature of rolling up the core.
(4) The first temperature probes in the mounting holes correspond to the second temperature probes in the battery steel shell in quantity and position one-to-one mode, the first temperature probes and the second temperature probes are arranged at the same positions in the battery steel shell and the winding core, and therefore the internal and external temperature contrast effect of the lithium ion battery is better.
(5) The upper and lower open ends of the mounting hole are coated with Kafter glue, the surface of the Kafter glue is coated with glue, the Kafter glue can be quickly bonded, and is a sealant which is excellent in insulativity and adhesiveness, moisture-proof, shock-proof, corona-resistant and leakage-resistant, has excellent cold and hot alternation resistance after being cured, and enables the interior of the lithium ion battery body to be completely isolated from the exterior in the charging and discharging process under the sealing effect of the double glue, so that the internal temperature measurement is more accurate.
(6) The temperature control module comprises a radiating fin and an electrothermal film which are fixedly arranged in a lithium ion battery body, the temperature difference between the inside and the outside of the lithium ion battery body is 6-8 ℃, and when the temperature inside the lithium ion battery body reaches to be higher than 25 ℃, the radiating fin is started to cool the lithium ion battery body, the temperature difference between the inside and the outside of the lithium ion battery body is 6-8 ℃, and the temperature inside the lithium ion battery body reaches to be lower than 10 ℃, the electrothermal film is started to heat the lithium ion battery body, so that when the temperature inside a battery steel shell is too high, the radiating fin can be started to rapidly dissipate heat accumulated in the battery steel shell, and when the temperature is too low, the electrothermal film can be started to heat a winding core, so that the charging and discharging capacity is not easily influenced by supercooling.
(7) The alarm module comprises a buzzer arranged on the outer wall of the steel shell of the battery, when the temperature control module breaks down or the temperature detected in the lithium ion battery body is too high to reach a certain value, the buzzer sounds to inform a worker or a user to carry out fault maintenance and cut off the circuit of the lithium ion battery body so as to stop the continuous temperature rise of the lithium ion battery body.
Drawings
FIG. 1 is a system flow diagram of the present invention;
FIG. 2 is a schematic structural diagram of a lithium ion battery body portion according to the present invention;
FIG. 3 is a flow chart of a method for monitoring temperature according to the present invention.
The reference numbers in the figures illustrate:
1 lithium ion battery body, 2 battery steel casings, 3 roll up core, 4 mounting holes, 5 first temperature probe, 6 second temperature probes.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Please refer to fig. 1-3, which is a system for monitoring temperature of a cylindrical lithium ion battery, comprising a lithium ion battery body 1, and a control module, a comparison module, a temperature detection module, a temperature control module and an alarm module which are arranged in the lithium ion battery body 1, wherein the lithium ion battery body 1 comprises a battery steel shell 2 and a winding core 3 which is fixedly arranged in the battery steel shell 2, the comparison module, the temperature detection module, the temperature control module and the alarm module are all connected with the control module by signals, and the comparison module is used for comparing the temperature difference information between the outside and the inside of the lithium ion battery body 1 which is displayed by the temperature detection module.
The temperature detection module is used for detecting the internal temperature and the external temperature of the lithium ion battery body 1, the temperature detection module comprises at least three first temperature probes 5 and at least three second temperature probes 6, a mounting hole 4 is formed in the upper end of the winding core 3, the three first temperature probes 5 are all bonded in the mounting hole 4 and are uniformly distributed at the upper part, the middle part and the lower part of the mounting hole 4, the plurality of second temperature probes 6 are respectively bonded at the upper part, the middle part and the lower part of the outer wall of the battery steel shell 2, the first temperature probes 5 and the second temperature probes 6 are respectively arranged at a plurality of different parts inside the winding core 3 and outside the battery steel shell 2, the internal and external temperature difference information of the lithium ion battery body 1 can be monitored, the internal and external temperature change conditions during charge and discharge circulation under different multiplying powers can be monitored, and further the internal and external temperatures of the lithium ion battery body 1 can be synthesized to know the approximate internal and external temperature change conditions, the resulting deviation is small.
The central line position department of rolling up core 3 is seted up to mounting hole 4, can make first temperature probe 5 install the central point department in rolling up core 3, and then the inside actual temperature of core 3 is rolled up with measuring to the monitoring that can be more accurate, first temperature probe 5 that is located mounting hole 4 and the equal one-to-one in the position of the 6 quantity of second temperature probe that is located outside battery steel casing 2, make battery steel casing 2 outer and roll up the same position department in core 3 and all be equipped with first temperature probe 5 and second temperature probe 6, and then make the contrast effect of the inside and outside temperature of lithium ion battery body 1 better.
The upper and lower open ends of the mounting hole 4 are coated with Kafter glue, 502 glue is coated on the surface of the Kafter glue, the Kafter glue is a sealant which can be quickly bonded, has excellent insulation property and bonding property, is moisture-proof, shock-proof, corona-resistant and leakage-resistant, has excellent cold and hot alternation resistance after being cured, and enables the interior of the lithium ion battery body 1 to be completely isolated from the exterior in the charging and discharging process under the sealing effect of the double glue, so that the internal temperature measurement is more accurate.
The temperature control module is used for heating and cooling the lithium ion battery body 1, the temperature control module comprises a radiating fin and an electrothermal film which are fixedly arranged in the lithium ion battery body 1, the temperature difference between the inside and the outside of the lithium ion battery body 1 is 6-8 ℃, when the internal temperature of the lithium ion battery body 1 reaches to be higher than 25 ℃, the radiating fin is started to cool the lithium ion battery body 1, the temperature difference between the inside and the outside of the lithium ion battery body 1 is 6-8 ℃, when the temperature in the lithium ion battery body 1 is lower than 10 ℃, the electric heating film is started to heat the lithium ion battery body 1, so that when the temperature in the battery steel shell 2 is overhigh, the heat that can start the fin and gather in with battery steel casing 2 is effluvium rapidly, and when the temperature was crossed lowly, can start the electric heat membrane and heat book core 3, make it be difficult for influencing charge-discharge ability because of the subcooling, be in work under the optimum temperature all the time.
The alarm module is used for producing early warning signals to the temperature control module that breaks down, and alarm module is including installing the bee calling organ (arbitrary position department) on battery steel casing 2 outer wall, and when the temperature control module breaks down or the temperature that detects in the lithium ion battery body 1 was too high and reaches a definite value, the bee calling organ sounded, and the notice staff or user carry out the breakdown maintenance and cut off lithium ion battery body 1 circuit and make lithium ion battery body 1 stop continuously rising the temperature.
A system for monitoring the temperature of a cylindrical lithium ion battery comprises the following steps:
s1, the temperature detection module detects the temperature information inside and outside the lithium ion battery body 1 and the temperature information at different positions inside and outside the lithium ion battery body 1, and then transmits the information to the control module;
s2, the control module transmits the information to the comparison module, the comparison module feeds the information back to the control module after comparing the temperature information, and the control module controls the electric heating film or the radiating fin in the temperature control module to start;
s21, when the comparison module detects that the highest temperature information value is lower than 10 ℃ and the difference between the internal temperature and the external temperature of the lithium ion battery body 1 reaches 6-8 ℃, feeding back the information to the control module, controlling the electric heating film in the temperature control module to start by the control module, heating the lithium ion battery body 1 until the temperature detection module detects that the temperature in the lithium ion battery body 1 reaches 16 ℃, feeding back the signal to the control module, and controlling the electric heating film in the temperature control module to stop starting by the control module;
s22, when the comparison module detects that the highest temperature information value reaches to be higher than 25 ℃ and the difference between the internal temperature and the external temperature of the lithium ion battery body 1 reaches 6-8 ℃, feeding the information back to the control module, controlling the starting of a radiating fin in the temperature control module by the control module, carrying out radiating operation on the lithium ion battery body 1 until the temperature detection module detects that the temperature in the lithium ion battery body 1 reaches 18 ℃, feeding the signal back to the control module, and controlling the radiating fin in the temperature control module to stop starting by the control module;
and S31, when the temperature detected by the temperature detection module does not change greatly with the temperature before the temperature control module is not started after the temperature control module heats or dissipates the heat of the lithium ion battery body 1, the signal is transmitted to the control module (indicating that the temperature control module has a fault), and the control module controls the alarm module to start (informing a worker or a user to carry out maintenance work of the fault).
And S32, when the temperature detection module detects that the temperature in the lithium ion battery body 1 is higher than a certain value, the temperature detection module transmits a signal to the control module, and the control module controls the alarm module to start and send an alarm signal (informs a worker or a user to cut off a circuit of the lithium ion battery body 1, so that the lithium ion battery body 1 stops working, and the lithium ion battery body 1 is well protected).
The running state of the lithium ion battery body 1 is known by monitoring the temperature inside and outside the lithium ion battery body 1, and then proper heating and cooling operations can be carried out on the running state, so that the service life of the lithium ion battery body 1 can be prolonged, real-time monitoring and accurate measurement on the temperature inside and outside the battery in the charging and discharging process of the battery can be realized, and the use safety of the lithium ion battery is improved.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (7)
1. The system for monitoring the temperature of the cylindrical lithium ion battery is characterized in that: comprises a lithium ion battery body (1), and a control module, a comparison module, a temperature detection module, a temperature control module and an alarm module which are arranged in the lithium ion battery body (1), the lithium ion battery body (1) comprises a battery steel shell (2) and a roll core (3) fixedly arranged in the battery steel shell (2), the comparison module, the temperature detection module, the temperature control module and the alarm module are all in signal connection with the control module, the comparison module is used for comparing the temperature difference information between the outside and the inside of the lithium ion battery body (1) displayed by the temperature detection module, the temperature detection module is used for detecting the temperature inside and outside the lithium ion battery body (1), the temperature control module is used for heating and cooling the lithium ion battery body (1), and the alarm module is used for generating an early warning signal for the temperature control module with a fault;
the temperature control module comprises a radiating fin and an electrothermal film which are fixedly arranged in the lithium ion battery body (1), the temperature difference between the inside and the outside of the lithium ion battery body (1) is 6-8 ℃, when the internal temperature of the lithium ion battery body (1) reaches to be higher than 25 ℃, the radiating fin is started to cool the lithium ion battery body (1), the temperature difference between the inside and the outside of the lithium ion battery body (1) is 6-8 ℃, and when the internal temperature of the lithium ion battery body (1) reaches to be lower than 10 ℃, the electrothermal film is started to heat the lithium ion battery body (1).
2. The system for monitoring the temperature of a cylindrical lithium ion battery according to claim 1, wherein: the temperature detection module comprises at least three first temperature probes (5) and second temperature probes (6), the upper end of the winding core (3) is opened and chiseled to form a mounting hole (4) in a three-way manner, the first temperature probes (5) are bonded in the mounting hole (4) and uniformly distributed at the upper part, the middle part and the lower part of the mounting hole (4), and the second temperature probes (6) are respectively attached to the upper part, the middle part and the lower part of the outer wall of the battery steel shell (2).
3. The system for monitoring the temperature of a cylindrical lithium ion battery according to claim 2, wherein: the mounting hole (4) is formed in the central line of the winding core (3).
4. The system for monitoring the temperature of a cylindrical lithium ion battery according to claim 2, wherein: the number and the positions of the first temperature probes (5) positioned in the mounting holes (4) correspond to those of the second temperature probes (6) positioned outside the battery steel shell (2) one by one.
5. The system for monitoring the temperature of a cylindrical lithium ion battery according to claim 2, wherein: the upper opening end and the lower opening end of the mounting hole (4) are coated with Kafter glue, and 502 glue is coated on the surface of the Kafter glue.
6. The system for monitoring the temperature of a cylindrical lithium ion battery according to claim 1, wherein: the alarm module comprises a buzzer arranged on the outer wall of the battery steel shell (2).
7. The system for monitoring the temperature of a cylindrical lithium ion battery according to claim 1, wherein: the method comprises the following steps:
s1, the temperature detection module detects the temperature information inside and outside the lithium ion battery body (1) and the temperature information at different positions inside and outside the lithium ion battery body (1), and then transmits the information to the control module;
s2, the control module transmits the information to the comparison module, the comparison module feeds the information back to the control module after comparing the temperature information, and the control module controls the electric heating film or the radiating fin in the temperature control module to start;
s21, when the comparison module detects that the highest temperature information value is lower than 10 ℃ and the difference between the internal temperature and the external temperature of the lithium ion battery body (1) reaches 6-8 ℃, feeding back the information to the control module, controlling the electric heating film in the temperature control module to start by the control module, heating the lithium ion battery body (1) until the temperature detection module detects that the internal temperature of the lithium ion battery body (1) reaches 16 ℃, feeding back a signal to the control module, and controlling the electric heating film in the temperature control module to stop starting by the control module;
s22, when the comparison module detects that the highest temperature information value reaches to be higher than 25 ℃ and the difference between the internal temperature and the external temperature of the lithium ion battery body (1) reaches 6-8 ℃, feeding the information back to the control module, controlling the starting of a radiating fin in the temperature control module by the control module, and carrying out radiating operation on the lithium ion battery body (1) until the temperature detection module detects that the internal temperature of the lithium ion battery body (1) reaches 18 ℃, feeding a signal back to the control module, and controlling the radiating fin in the temperature control module to stop starting by the control module;
s31, when the temperature detected by the temperature detection module and the temperature control module do not change greatly before the temperature control module is started after the temperature control module heats or dissipates the heat of the lithium ion battery body (1), transmitting a signal to the control module, and controlling the alarm module to start by the control module;
and S32, when the temperature detection module detects that the temperature in the lithium ion battery body (1) is higher than a certain value, the signal is transmitted to the control module, and the control module controls the alarm module to start and send out an alarm signal.
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| CN114184639B (en) * | 2021-11-29 | 2023-12-29 | 湖南省驰普新能源科技有限公司 | Thermal diffusion detection method and system of battery system, storage medium and intelligent terminal |
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| CN109860725A (en) * | 2018-12-25 | 2019-06-07 | 山东精工电子科技有限公司 | A kind of cylindrical lithium ion battery and preparation method with internal heat dissipating and tab fixed structure |
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