CN105425161B - Thermoelectric parameter testing device for single electrode of lithium ion battery - Google Patents
Thermoelectric parameter testing device for single electrode of lithium ion battery Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 26
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 239000011521 glass Substances 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 239000003708 ampul Substances 0.000 claims description 23
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 239000004020 conductor Substances 0.000 claims description 12
- 230000005619 thermoelectricity Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 4
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims 1
- 239000007772 electrode material Substances 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 3
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000011160 research Methods 0.000 description 11
- 239000000446 fuel Substances 0.000 description 8
- 238000007600 charging Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 238000003411 electrode reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 229910000733 Li alloy Inorganic materials 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000001989 lithium alloy Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002848 electrochemical method Methods 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 238000001595 flow curve Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 206010068052 Mosaicism Diseases 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000007707 calorimetry Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a single-electrode thermoelectric parameter testing device of a lithium ion battery, which comprises an isothermal calorimeter, a measuring channel, a copper wire, a battery testing system and an inverted Y-shaped glass tube, wherein the inverted Y-shaped glass tube consists of an upper end branch and a lower end arc branch, the branches are mutually communicated, a spherical or ellipsoidal protruding part is arranged in the middle of the upper end branch, an injector is arranged at an opening of the upper end branch and used for extracting air, removing bubbles existing in electrolyte and reducing internal resistance, and two openings of the lower end arc branch are respectively connected with upper openings of two polytetrafluoroethylene tubes and seal the connection position. The invention has simple structure and easy operation, evaluates the safety performance of the battery while evaluating the thermal and electrical properties of the electrode material, improves the measurement accuracy and is beneficial to optimizing the thermal design of a battery system.
Description
Technical field
The present invention relates to lithium ion battery thermoelectricity parameter test devices, in particular, provide a kind of battery single electrode charge and discharge
Heat, the measurement device of electrical parameter in the process.
Background technology
After successfully realizing commercialization from nineteen ninety, it is very superior secondary that lithium ion battery has evolved into a kind of performance
Electrochmical power source.In recent years, lithium ion battery is gradually increased in military and aerospace field application, and progressively move towards energy storage,
The fields such as electric vehicle.But the performance of lithium ion battery is influenced by temperature very greatly, temperature is excessively high and is unevenly distributed meeting
Accelerate the decline of battery performance, reduce the service life of battery or even be also possible to generate thermal runaway initiation safety problem.Lithium ion
Cell safety sex chromosome mosaicism can be attributed to heat production and the heat dissipation problem of battery.Hot relevant issues are related to battery and its electrode material
Charge-discharge performance and cycle life, and battery material（Electrode and electrolyte）Determine thermogenetic quantity and the rate of heat release.
The performance of electrode material is traditionally evaluated using charge/discharge capacity, cycle performance, high rate performance etc., but cannot reflect that its fever is special
Property.Therefore, complex condition is studied（High power charging-discharging, high-temperature work environment, internal short-circuit cause hot-spot, component or
Battery failures etc.）The effective evaluation method of lithium ion battery and its electrode material thermoelectricity capability is to solving lithium ion battery security
With important scientific guidance meaning.
At present, for the research of lithium ion battery fuel factor, thermoelectrochemistry method is mainly used.This method needs simultaneously
Record voltage-to-current-hot-fluid of institute's research system in measurement process（The temperature difference）- time four-dimensional information, and based on electrochemistry, heat
Mechanics and basic principle of dynamics processing experimental data and analysis experimental result, than electrochemical method and heat chemistry side is used alone
Method can obtain more information.Electrochemical method is usually combined to the electrochemistry and chemistry of measure system with various Calorimetric Techniques
Reaction heat is referred to as electrochemistry-calorimetric joint technology.In recent years, electrochemistry-calorimetric joint technology is continuously available improvement and hair
Exhibition, and started the fuel factor for being applied to research battery system and its electrode material, become a kind of non-in the developmental research of battery
Normal effective means.Wherein, the Calorimetric Techniques mainly used include isothermal microcalorimetry technology and rate of acceleration Calorimetric Techniques.Both at home and abroad
Existing research is close in different electric currents by battery charging and discharging test device and variety classes calorimeter the system research battery that is coupled together
Temperature change or heat production situation during the lower charge and discharge cycles of degree.Such as patent of invention（CN 102830358 B）, disclose one
Kind battery thermoelectricity parameter test device, including battery charging and discharging setup module, heat-conducted calorimetry module, signal processing mould
Block.Mesuring battary is fixed and electric wire connecting junction is placed in calorimetric bottle, then is placed in calorimetric pipe；Battery charging and discharging module is fixed by battery
And electric wire connecting junction is supplied to the different electrical parameter of mesuring battary, and mesuring battary experience is made to charge, the various process such as electric discharge are surveyed simultaneously
The electric current of the fixed process, voltage, hot-fluid versus time curve, by analyzer obtain characterization battery charge-discharge performance and
The characteristic parameter of security performance.While battery electrical characteristic parameter is tested, by accurately measuring the caloric value of battery, evaluate
The electric property of battery simultaneously makes its security performance accurate evaluation, improves accuracy of judgement degree；Saito（Journal of
Power Sources, 2005, 146: 770-774）, Lu et al.（Electrochimica Acta, 2006, 51:
1322-1329), Krause et al.（Journal of Electrochemical Society, 2012, 159 (7): 937-
943）, Ping et al.（Applied energy, 2014, 129: 261-273）Using C80 micro-calorimeters or accelerate calorimetric
Instrument is combined the thermal behavior to variety classes lithium ion battery during charge and discharge cycles respectively with battery charging and discharging test device
Systematic research has been carried out with temperature change.
However, major part device is being transported using the full battery of commercialization lithium ion or half-cell system as test object at present
Row parameter carries out thermal behavior research in the range of limiting, and gained thermodynamic data is based on the whole fuel factor of lithium ion battery.And
The reaction heat effect resulted from respectively on positive or negative pole single electrode may be different, even completely opposite.It is anti-in battery
During answering, there are significant differences with cathode heat release for anode heat release, then in lithium ion battery particularly high-capacity lithium pile
It must take into consideration the otherness of its internal different parts fuel factor in the thermal design of system.It is not only does this facilitate optimization battery system
Thermal design, and can preferably reflect the thermoelectrochemistry performance of battery material.Huang Qian（Ph.D. Dissertation, 2007,115-
116）Using electrochemistry-calorimetric determination Li/Li+The Entropy Changes △ S of electrode reaction.Battery is tested by two identical metals
Lithium piece electrode forms, and one of lithium electrode is fixed in metal copper mould, and is placed it in calorimeter, another lithium electricity
Pole pipe is placed in outside calorimeter, and a plastic tube for filling electrolyte is used to connect the two electrodes.It is filled using the experiment
The positive and negative single electrode being directed to the research of reversible reaction fuel factor in lithium-ion battery system is put, but also has the following disadvantages it
Place：Two electrodes to be measured are inside and outside positioned at calorimeter respectively, between two electrodes it is separated by a distance farther out, connect this
The plastic tube of two electrodes is long, and bubble is also easy to produce in the electrolyte in pipe, and is not easy to exclude, and internal resistance is caused to increase, to surveying
The accuracy of test result has an impact；Collector of the copper as lithium ion battery, it is poor with the compatibility of electrolyte system, lithium from
Sub- battery electrolytic solution has very strong corrosivity, once copper corrosion or dissolving will cause to be fixed on electrode material on copper mould
It comes off, hinders the transmission of electronics, directly affect the performance and security of lithium ion battery.
Therefore, how it is significantly more efficient measure the reaction heat effect that is generated on single electrode of inside lithium ion cell, especially
It is related to battery system accurate thermal chemical parameters（Chemically react enthalpy change, chemical reaction Entropy Changes, chemical reaction gibbs free energy change
Deng）It is a urgent problem to be solved.
The content of the invention
For solve the problems, such as it is above-mentioned present in and defect, the present invention a kind of lithium ion battery single electrode thermoelectricity parameter is provided and is surveyed
Trial assembly is put, and systematically studies the fuel factor that single electrode generates, so as to more objectively evaluate the thermoelectricity capability of electrode material.
Art solutions of the present invention are as described below：Anode, cathode, electrolyte, polyfluortetraethylene pipe one, polytetrafluoroethylene (PTFE)
Pipe two, stainless (steel) wire one, stainless (steel) wire two, rubber stopper one, rubber stopper two, ampoule bottle one, ampoule bottle two, copper conductor and battery are surveyed
Test system further includes a glass tube of falling Y shape, and the glass tube of falling Y shape is made of upper end branch and lower end arcuate limb, between branch
It is interconnected, there is ball-shaped or spheroid shape protrusion among the branch of upper end, the opening of upper end branch is placed syringe, is used for
Extract air, exclude bubble present in electrolyte, reduce internal resistance, two of lower end arcuate limb openings respectively with two poly- four
Fluoride tubes one are connected with the upper opening of polyfluortetraethylene pipe two, and junction is sealed；It is polyfluortetraethylene pipe one, stainless
Steel mesh one, rubber stopper one and ampoule bottle one are linked to be the first Measurement channel, polyfluortetraethylene pipe two, stainless (steel) wire two, rubber stopper two
It is linked to be the second Measurement channel with ampoule bottle two, the first Measurement channel and the second Measurement channel are symmetrical structure, multigroup first measurement
Passage and the second Measurement channel composition isothermal calorimeter；The stainless (steel) wire one and stainless (steel) wire two are collector, are respectively used to
Anode and cathode are wrapped up, plays the function of transmission ion；One end of the copper conductor is connected to stainless (steel) wire one, the other end and battery
Test system is connected；Hole on the rubber stopper one, the diameter of hole and the major diameter fit of polyfluortetraethylene pipe one, by poly- four
Fluoride tubes one are passed through from hole, and interface is sealed；The ampoule bottle one is connected with rubber stopper one, and junction carries out close
Envelope.
The protrusion is located at the centre position of the glass tube of falling Y shape upper end branch, for coordinating syringe air-isolation
With electrolyte.
The stainless (steel) wire one and stainless (steel) wire two are collector, and the compatibility with electrolyte system rises better than metallic copper
Transmit the function of ion；Stainless (steel) wire is martensitic stain less steel material, has good heat-conductive characteristic, can be able to bear strong corrosion,
Oxidation resistance is better than metallic copper；Stainless (steel) wire is L-shaped, and vertical component can be used as lug, from rubber stopper and the sky of ampoule bottle
Stretch out in gap, be connected with copper conductor, the size of parallel portion and the dimensional fits of electrode, after folding can the good electrode of tight,
Be conducive to the raising of cycle performance of battery.
One end of the copper conductor is connected with stainless (steel) wire one, and the other end is connected with battery test system.
Hole on the rubber stopper one, the diameter of hole and the major diameter fit of polyfluortetraethylene pipe one, by polytetrafluoroethyl-ne
Alkene Guan Yicong holes pass through, and interface is sealed.
The ampoule bottle one is connected with rubber stopper one, and junction is sealed.
The battery test system is used to set the charge and discharge condition of battery under different multiplying.
The positive electrode and negative electrode size is identical, surface area 0.8-1.0cm2；The cathode is lithium metal or lithium alloy.
The present invention is designed using the glass tube of falling Y shape, can exclude bubble present in electrolyte, reduces internal resistance to measurement result
Influence, improve the accuracys of data.It is anti-that the present invention can be used for research complex condition inside battery to be generated on single electrode
Fuel factor is answered, obtains electricity, the thermal parameter of different single electrodes, the design of " L " shape stainless (steel) wire further improves measurement result
Accuracy.The configuration of the present invention is simple, it is easily operated, the security of battery is evaluated while electrode material heat, electrical property is evaluated
Can, basic data is provided for battery thermal management, helps to optimize the thermal design of battery system.
Description of the drawings
Fig. 1 is the structure diagram of lithium ion battery single electrode thermoelectricity parameter test device of the present invention；
Fig. 2 is the structure diagram of " L " shape stainless (steel) wire of the invention.
Specific embodiment
The embodiment of the present invention is described further below in conjunction with attached drawing, described embodiment is only the present invention one
Section Example, instead of all the embodiments, patent that the given examples are served only to explain the present invention is not intended to limit the present invention
Scope.
It is shown in Figure 1, a kind of single electrode test device for thermoelectrochemistry research, including：Anode 1, cathode 2, electricity
Solve liquid 3, polyfluortetraethylene pipe 1, polyfluortetraethylene pipe 2 20, stainless (steel) wire 1, stainless (steel) wire 2 21, rubber stopper 1, rubber
Rubber plug 2 22, ampoule bottle 1, ampoule bottle 2 23, copper conductor 10, battery test system 11, syringe 12, the glass tube of falling Y shape 13,
It is upper end branch 14, protrusion 15, lower end left-hand branch 16, lower end right-hand branch 17, wherein polyfluortetraethylene pipe 1, stainless
Steel mesh 1, rubber stopper 1 and ampoule bottle 1 connect into the first Measurement channel 8, polyfluortetraethylene pipe 2 20, stainless (steel) wire two
21st, rubber stopper 2 22 and ampoule bottle 2 23 connect into the second Measurement channel 19, and the first Measurement channel 8 and the second Measurement channel 19 are
Symmetrical structure, multigroup first Measurement channel, 8 and second Measurement channel 19 form isothermal calorimeter 9.
Further, the glass tube of falling Y shape 13 is by upper end branch 14, lower end left-hand branch 16, lower end right-hand branch 17
It forms, is interconnected between branch, there is ball-shaped or spheroid shape protrusion 15,16 He of lower end left-hand branch among the branch of upper end
Right-hand branch 17 opening in lower end is connected respectively with polyfluortetraethylene pipe 1 and polyfluortetraethylene pipe 2 20, lower end left-hand branch
Angle between 16 and lower end right-hand branch 17 is 100-120 degree, and ampoule bottle 1 and ampoule bottle 2 23 is coordinated to be surveyed respectively first
Position in amount 8 and second Measurement channel 19 of passage is designed, and is helped to shorten the distance of electrolyte circulation, is avoided the occurrence of gas
Bubble reduces the internal resistance generated in electrode process, while junction is sealed；The upper end branch 14 of the glass tube of falling Y shape 13
Opening places syringe 12, for extracting air, excludes bubble present in electrolyte, reduces internal resistance, it is ensured that the glass of falling Y shape
The 1/3-1/2 positions of 13 upper end branch of pipe, 14 center protrusion part 15, the lower end left-hand branch 16 being connected with protrusion 15, under
It holds and electrolyte is full of in right-hand branch 17 and polyfluortetraethylene pipe 1 and polyfluortetraethylene pipe 2 20.
Further, the protrusion 15 is located at the centre position of 13 upper end branch 14 of the glass tube of falling Y shape, for matching somebody with somebody
Close 12 air-isolation of syringe and electrolyte.
Further, the stainless (steel) wire 1 and stainless (steel) wire 2 21 are collector, for wrapping up anode 1 and/or cathode
2, play the function of transmission ion.Stainless (steel) wire 1 and stainless (steel) wire 2 21 are martensitic stain less steel material, have good heat
Conductive performance can be able to bear strong corrosion；Stainless (steel) wire 1 and stainless (steel) wire 2 21 are L-shaped, and vertical component 17 can be used as lug, from
Rubber stopper 1 with stretched out in the gap of ampoule bottle 1, be connected with copper conductor 10, the size of parallel portion 18 and the size of electrode
Cooperation, after folding can the good electrode of tight, be conducive to the raising of cycle performance of battery.
Further, one end of the copper conductor 10 is connected with stainless (steel) wire 1, the other end and 11 phase of battery test system
Even；Hole on the rubber stopper 1, the diameter of hole and the major diameter fit of polyfluortetraethylene pipe 1, by polyfluortetraethylene pipe
One 4 pass through from hole, and interface is sealed；The ampoule bottle 1 is connected with rubber stopper 1, and junction is sealed.
Further, the anode 1 is identical with 2 size of cathode, surface area 0.8-1.0cm2；The cathode 2 is metal
Lithium or lithium alloy.
It is shown in Figure 1, battery test system 11 is run, according to the size and performance of electrode material to be measured, equity
Warm 9 the first Measurement channel 8 of inside of calorimeter and the second Measurement channel 19 set constant-current constant-voltage charging system respectively（CC-CV）And perseverance
Discharge system is flowed, including constant-current charge time, constant-current discharge time, time of repose, constant voltage charging time and corresponding voltage, electricity
Flow valuve.In the entire experiment process, the first Measurement channel 8 and the second Measurement channel 19 are maintained at given environment temperature（0-60
℃）, anode 1 and cathode 2 that stainless (steel) wire 5 wraps up are respectively put into the ampoule bottle 7 equipped with electrolyte 3, and are suspended on isothermal
19 center of 9 the first Measurement channel 8 of inside of calorimeter and the second Measurement channel, anode 1 and cathode 2 are respectively by copper conductor and outside
Battery test system 11 connects.In the case of given environment temperature and charge-discharge magnification, the accurate single electrode that measures is in charge and discharge
The heat and rate of heat generation generated in the process.In the entire experiment process, battery test system 11 and isothermal calorimeter 9 will divide
Not Ji Lu single electrode and formed battery the data such as voltage, electric current and heat flow signal.By isothermal calorimeter 9 measure battery and
Single electrode voltage and hot-fluid versus time curve, that is, heat flow curve in different multiplying charge and discharge, can obtain charge and discharge
Many important thermoelectricity information in journey.By being integrated to the heat flow curve in charge and discharge process, and utilize isothermal calorimeter 9
Calibration constant, can obtain battery and the total caloric value of single electrode reaction and its caloric value during charging and discharging.Profit
The electricity that its integral area is its different charging process and discharge process, then root is obtained with the time in electric signal from current data
Total amount and reaction molal quantity are generated according to the reaction heat drawn, can obtain the chemical reaction in battery and single electrode charge and discharge process
Enthalpy change.Using a series of fundamental equation of thermodynamics, reversible fuel factor, the chemistry that can obtain charge or discharge process electrode reaction are anti-
Answer Entropy Changes and chemical reaction gibbs free energy change：
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
In formula, qchFor the heat that charging process generates, mJ；qdischFor the heat that discharge process generates, mJ；qtotalTo follow
Total heat, mJ during ring；H (t) be hot-fluid, mW；t1And t2Reaction time during being respectively charged and discharged, s；N is
The amount of substance, mol；Q is electricity, C；F is Faraday constant, Cmol-1；T be electrode reaction time, s；I (t) is electric current,
mA；△rHmIt is to chemically react enthalpy change, kJmol-1；△rSmIt is to chemically react Entropy Changes, JK-1·mol-1；T is temperature, K；qrIt is
Reversible rate of heat production, Js-1；△rGmIt is to chemically react gibbs free energy change, kJmol-1。
Shown in Figure 2, with tweezers, gently pinching surface product is 0.8-1.0cm2Anode 1 or cathode 2 be placed in " L " shape not
Rust one 5 parallel portion 18 of steel mesh folds tight anode 1 or cathode 2 after stainless (steel) wire 5, and is fastened with jack and hand hammer,
Ensure good contact effect.5 vertical component 17 of stainless (steel) wire can be used as lug, from the gap of ampoule bottle 1 and rubber stopper 1
Middle stretching is connected with copper conductor 10, and is guided from 9 the first Measurement channel 8 of inside of isothermal calorimeter, with battery testing
System 11 is connected.
In conclusion the configuration of the present invention is simple, easily operated, evaluation electricity while electrode material heat, electrical property is evaluated
The security performance in pond helps to optimize the thermal design of battery system.
Claims (4)
1. a kind of lithium ion battery single electrode thermoelectricity parameter test device, including：Anode（1）, cathode（2）, electrolyte（3）, it is poly-
Tetrafluoroethene pipe one（4）, polyfluortetraethylene pipe two（20）, stainless (steel) wire one（5）, stainless (steel) wire two（21）, rubber stopper one（6）、
Rubber stopper two（22）, ampoule bottle one（7）, ampoule bottle two（23）, copper conductor（10）And battery test system（11）, feature exists
In：Further include a glass tube of falling Y shape（13）, the glass tube of falling Y shape（13）By upper end branch（14）With lower end arcuate limb（16）
It forms, is interconnected between branch, upper end branch（14）There are ball-shaped or spheroid shape protrusion in centre（15）, upper end branch
（14）Opening place syringe（12）, for extracting air, bubble present in electrolyte is excluded, reduces internal resistance, lower end
Arcuate limb（16）Two opening respectively with two polyfluortetraethylene pipes one（4）Polyfluortetraethylene pipe two（20）Upper opening connect
It connects, and junction is sealed；Polyfluortetraethylene pipe one（4）, stainless (steel) wire one（5）, rubber stopper one（6）With ampoule bottle one
（7）It is linked to be the first Measurement channel（8）, polyfluortetraethylene pipe two（20）, stainless (steel) wire two（21）, rubber stopper two（22）And ampoule bottle
Two（23）It is linked to be the second Measurement channel（19）, the first Measurement channel and the second Measurement channel are symmetrical structure, multigroup first measurement
Passage（8）With the second Measurement channel（19）Form isothermal calorimeter（9）；The stainless (steel) wire one（5）With stainless (steel) wire two（21）
For collector, package anode is respectively used to（1）And cathode（2）, act the function of transmitting ion；The copper conductor（10）One end connect
It is connected to stainless (steel) wire one（5）, the other end and battery test system（11）It is connected；The rubber stopper one（6）Upper hole, hole
Diameter and polyfluortetraethylene pipe one（4）Major diameter fit, by polyfluortetraethylene pipe one（4）It is passed through from hole, interface carries out close
Envelope；The ampoule bottle one（7）With rubber stopper one（6）It is connected, junction is sealed.
2. lithium ion battery single electrode thermoelectricity parameter test device as described in claim 1, it is characterised in that：The Y
The angle of the lower end arcuate limb center line of shape glass tube is 100-120 degree.
3. lithium ion battery single electrode thermoelectricity parameter test device as described in claim 1, it is characterised in that：The stainless steel
Net one（5）It is L-shaped, vertical component（17）As lug, from rubber stopper one（6）With ampoule bottle one（7）Gap in stretch out, with
Copper conductor（10）It is connected, parallel portion（18）Size and electrode dimensional fits, the good anode of tight after folding.
4. lithium ion battery single electrode thermoelectricity parameter test device as described in claim 1, it is characterised in that：Stainless (steel) wire one
（5）For martensitic stain less steel material.
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| CN201510842996.5A CN105425161B (en) | 2015-11-29 | 2015-11-29 | Thermoelectric parameter testing device for single electrode of lithium ion battery |
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| CN201510842996.5A CN105425161B (en) | 2015-11-29 | 2015-11-29 | Thermoelectric parameter testing device for single electrode of lithium ion battery |
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| CN105425161B true CN105425161B (en) | 2018-06-01 |
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| CN102830358A (en) * | 2012-03-17 | 2012-12-19 | 长沙理工大学 | Thermoelectric parameter testing device of battery |
| CN103293484A (en) * | 2013-06-06 | 2013-09-11 | 天津力神电池股份有限公司 | Method for quickly evaluating performance of lithium ion batteries by testing quantities of released heat |
| CN204257087U (en) * | 2014-11-25 | 2015-04-08 | 石家庄学院 | A kind of simple and easy primary element preparation facilities |
| CN204375865U (en) * | 2014-12-11 | 2015-06-03 | 山东精工电子科技有限公司 | A kind of cylindrical lithium ion battery security test device |
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| CN102830358A (en) * | 2012-03-17 | 2012-12-19 | 长沙理工大学 | Thermoelectric parameter testing device of battery |
| CN103293484A (en) * | 2013-06-06 | 2013-09-11 | 天津力神电池股份有限公司 | Method for quickly evaluating performance of lithium ion batteries by testing quantities of released heat |
| CN204257087U (en) * | 2014-11-25 | 2015-04-08 | 石家庄学院 | A kind of simple and easy primary element preparation facilities |
| CN204375865U (en) * | 2014-12-11 | 2015-06-03 | 山东精工电子科技有限公司 | A kind of cylindrical lithium ion battery security test device |
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