WO2016002454A1 - 密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法 - Google Patents
密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法 Download PDFInfo
- Publication number
- WO2016002454A1 WO2016002454A1 PCT/JP2015/066754 JP2015066754W WO2016002454A1 WO 2016002454 A1 WO2016002454 A1 WO 2016002454A1 JP 2015066754 W JP2015066754 W JP 2015066754W WO 2016002454 A1 WO2016002454 A1 WO 2016002454A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- secondary battery
- polymer matrix
- matrix layer
- deformation
- sealed secondary
- Prior art date
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/24—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in magnetic properties
-
- 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
- H01M10/34—Gastight accumulators
-
- 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
- H01M10/42—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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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 of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a sensor for detecting deformation of a sealed secondary battery, a sealed secondary battery to which the sensor is attached, and a method for detecting deformation of the sealed secondary battery.
- sealed secondary batteries represented by lithium ion secondary batteries (hereinafter sometimes referred to simply as “secondary batteries”) are not only mobile devices such as mobile phones and laptop computers, but also electric vehicles and hybrids. It is also used as a power source for electric vehicles such as cars.
- a single battery (cell) that constitutes a secondary battery includes an electrode group in which a positive electrode and a negative electrode are wound or stacked with a separator interposed therebetween, and an outer package that houses the electrode group.
- a laminate film or a metal can is used as an exterior body, and an electrode group is accommodated together with an electrolytic solution in an enclosed space.
- Secondary batteries are used in the form of battery modules or battery packs that include a plurality of single cells in applications where a high voltage is required, such as the power supply for electric vehicles described above.
- a battery module a plurality of single cells connected in series are accommodated in a housing, and, for example, four single cells are connected in two parallel two series or four series.
- various devices such as a controller are accommodated in the casing in addition to the plurality of battery modules connected in series.
- a battery pack housing is formed in a shape suitable for in-vehicle use.
- Such a secondary battery has a problem that when the electrolytic solution is decomposed due to overcharge or the like, the unit cell expands as the internal pressure increases due to the decomposition gas, and the secondary battery is deformed. In that case, if the charging current or discharging current is not stopped, it will ignite and the secondary battery will burst as the worst result. Therefore, in order to prevent the secondary battery from bursting, it is important to detect the deformation of the secondary battery due to the swelling of the single cell with high sensitivity so that the charging current and the discharging current can be stopped in a timely manner.
- Patent Document 1 describes a method of forming a sensor insertion space in a battery module in order to attach a temperature sensor for detecting the temperature of the single battery in a battery module having a plurality of single batteries.
- a temperature sensor for detecting the temperature of the single battery in a battery module having a plurality of single batteries.
- a strain gauge is bonded to the surface of a cell case (an example of an exterior body), and a change in resistance value of the strain gauge according to the swelling of the case is detected, so that A method for reducing the charging or discharging current is described.
- a technique using a strain gauge there is a risk that the sensor characteristics may vary due to the displacement of the strain gauge due to vibration and the stability may be deteriorated particularly when used for a long period of time.
- the above-mentioned secondary battery can be used in various temperature environments, it is necessary to suppress a decrease in sensor sensitivity not only at normal temperature but also at low and high temperatures. Therefore, for example, when sensoring the deformation of the secondary battery as a scale, it is actually required that the deformation of the secondary battery due to the swelling of the single cell can be detected with high sensitivity in a wide temperature range.
- the present invention provides a deformation detection sensor for a sealed secondary battery, comprising a polymer matrix layer and a detection unit, and the polymer matrix layer changes in the external field according to the deformation of the polymer matrix layer.
- the filler is contained in a dispersed manner, the detection unit detects a change in the external field, and the polymer matrix layer has a glass transition temperature (Tg) of ⁇ 30 ° C. or lower.
- Tg glass transition temperature
- the present invention relates to a deformation detection sensor for a secondary battery.
- the polymer matrix layer is mounted so as to be sandwiched between, for example, the cells adjacent to each other, between the cell and the housing that houses the cells.
- the battery module is sandwiched between the battery module housing included in the battery pack and the battery module housing adjacent to the battery module housing, and further, in the gap between the battery module housing and the battery pack housing. Is done.
- the polymer matrix layer may be attached in a compressed state.
- the polymer matrix layer is deformed accordingly.
- a detection part detects the change of the external field accompanying the deformation
- the polymer matrix layer attached as described above does not compress the volume of the secondary battery and suppresses displacement due to vibration or the like, thereby stabilizing the sensor characteristics.
- the polymer matrix layer constituting the deformation detection sensor of the sealed secondary battery according to the present invention is set so that the glass transition temperature (Tg) is ⁇ 30 ° C. or lower.
- Tg glass transition temperature
- the change in the elastic modulus of the polymer matrix layer is smaller at low and high temperatures than at normal temperature. Sensitivity can be detected.
- the polymer matrix layer contains a magnetic filler as the filler, and the detection unit detects a change in the magnetic field as the external field.
- the detection unit detects a change in the magnetic field as the external field.
- it is possible to detect a change in the magnetic field accompanying the deformation of the polymer matrix layer without wiring.
- a Hall element having a wide sensitivity region can be used as the detection unit, highly sensitive detection can be performed over a wider range.
- the polymer matrix layer has a storage elastic modulus E ′ (20 ° C.) at 20 ° C. and a storage elastic modulus E ′ ( ⁇ 20 ° C.) at ⁇ 20 ° C.
- Ratio E ′ (20 ° C./ ⁇ 20° C.) is 0.2 or more, and ratio of storage elastic modulus E ′ (20 ° C.) at 20 ° C. to storage elastic modulus E ′ (60 ° C.) at 60 ° C.
- E ′ (20 ° C./60° C.) is preferably 5 or less.
- the polymer matrix layer preferably has a storage elastic modulus E ′ (20 ° C.) at 20 ° C. of 5.0 MPa or less.
- E ′ storage elastic modulus
- the polymer matrix layer is a polyurethane elastomer obtained by reacting an active hydrogen-containing compound with an isocyanate component, and the active hydrogen-containing compound contains a silicone-containing polyol.
- the inclusion is preferable because the Tg of the polymer matrix layer is adjusted to be within a desired range, and deformation of the sealed secondary battery due to the swelling of the single cell can be detected with high sensitivity in a wide temperature range.
- the number average molecular weight (Mn) of the silicone-containing polyol is 1000 to 5000, and the content of the silicone-containing polyol in the polymer matrix layer is 20 to 80 wt. % Is preferred.
- Mn number average molecular weight
- the “silicone content” can be calculated by the following formula.
- Silicone content (wt%) reactive silicone weight (g) / total resin component amount (g) ⁇ 100
- the sealed secondary battery according to the present invention is provided with the above-described deformation detection sensor, and may be a single battery module or a battery pack including a plurality of battery modules.
- deformation due to swelling of the single battery is detected with high sensitivity by a deformation detection sensor. Nevertheless, the volume of the secondary battery is not compressed by the deformation detection sensor, and the sensor characteristics become stable.
- the deformation detection method for a sealed secondary battery according to the present invention is the deformation detection method for a sealed secondary battery, wherein a polymer matrix layer is mounted in a gap of the sealed secondary battery, and the polymer matrix layer Contains dispersed fillers that change the external field according to the deformation of the polymer matrix layer, and has a glass transition temperature (Tg) of ⁇ 30 ° C. or less, which accompanies deformation of the polymer matrix layer. A change in the external field is detected, and a deformation of the sealed secondary battery is detected based on the change.
- Tg glass transition temperature
- the polymer matrix layer is mounted in the gap of the sealed secondary battery.
- the polymer matrix layer is deformed accordingly, and the deformation of the secondary battery is detected by detecting the change in the external field accompanying the deformation of the polymer matrix layer. It can be detected with high sensitivity.
- the glass transition temperature (Tg) of the polymer matrix layer is set to be ⁇ 30 ° C. or lower, the deformation of the sealed secondary battery due to the swelling of the single cell can be performed in a wide temperature range. It can be detected with high sensitivity.
- the polymer matrix layer is mounted in a compressed state by being sandwiched in a gap of the sealed secondary battery.
- the polymer matrix layer attached as described above does not compress the volume of the secondary battery and suppresses displacement due to vibration or the like, thereby stabilizing the sensor characteristics.
- FIG. 1 A perspective view schematically showing an example of a battery module Sectional drawing which shows typically the AA arrow cross section of FIG. Sectional drawing which shows another example of the attachment location of a polymer matrix layer
- the battery module 1 shown in FIGS. 1 and 2 has a plurality of single cells 2 inside the casing 11.
- four unit cells 2 are connected in series (for example, 2 parallel 2 series or 4 series).
- the unit cell 2 includes an electrode group in which a positive electrode and a negative electrode are wound or laminated with a separator interposed therebetween, and an exterior body that houses the electrode group. In the sealed space inside the exterior body, the electrode group is accommodated together with the electrolytic solution.
- a laminate film such as an aluminum laminate foil is used for the outer package of the unit cell 2, but a cylindrical or square metal can may be used instead.
- the battery module 1 is a lithium ion secondary battery that can be used as a power source for an electric vehicle, and is mounted on the vehicle in the form of a battery pack.
- a battery pack a plurality of battery modules 1 connected in series are accommodated in a casing together with various devices such as a controller.
- the casing of the battery pack is formed in a shape suitable for in-vehicle use, for example, a shape that matches the underfloor shape of the vehicle.
- the sealed secondary battery is not limited to a non-aqueous electrolyte secondary battery such as a lithium ion battery, and may be an aqueous electrolyte secondary battery such as a nickel metal hydride battery.
- a deformation detection sensor is attached to the sealed secondary battery, and the deformation detection sensor includes a polymer matrix layer 3 and a detection unit 4.
- the polymer matrix layer 3 is affixed to the surface of the unit cell 2 (the outer surface of the exterior body), and an adhesive or an adhesive tape is used for the affixation as necessary.
- the polymer matrix layer 3 is formed in a sheet shape, and is formed in a gap in the secondary battery, for example, in a gap between adjacent unit cells 2, a unit cell 2 as shown in FIG. It is arranged between.
- the polymer matrix layer 3 can be bent and attached to the corners of the unit cell 2 or the casing 11.
- the polymer matrix layer 3 contains dispersed fillers that change the external field according to the deformation of the polymer matrix layer 3.
- the detection unit 4 detects a change in the external field.
- the detection unit 4 is disposed away from the polymer matrix layer 3 to the extent that changes in the external field can be detected, and is preferably affixed to a relatively firm location that is not easily affected by the swelling of the unit cell 2.
- the detection unit 4 is affixed to the outer surface of the casing 11, but the present invention is not limited thereto, and the detection unit 4 may be affixed to the inner surface of the casing 11 or the casing of the battery pack.
- These cases are formed of, for example, metal or plastic, and a laminate film may be used for the case of the battery module.
- the polymer matrix layer 3 shown in FIG. 2 is sandwiched in the gap and attached in a compressed state.
- the thickness of the polymer matrix layer 3 in an uncompressed state is larger than the gap G1 in which the polymer matrix layer 3 is disposed, and the polymer matrix layer 3 is compressed in the thickness direction.
- the polymer matrix layer 3 shown in FIG. 3 is also sandwiched in the gap and mounted in a compressed state.
- the polymer matrix layer 3 is sandwiched in the gap between the unit cell 2 and the housing 11 and mounted in a compressed state. ing.
- the thickness of the polymer matrix layer 3 in an uncompressed state is larger than the gap G2 in which the polymer matrix layer 3 is disposed, and the polymer matrix layer 3 is also compressed in the thickness direction.
- the detection unit 4 When the cell 2 swells, the polymer matrix layer 3 is deformed accordingly, and the change in the external field accompanying the deformation of the polymer matrix layer 3 is detected by the detection unit 4.
- the detection signal output from the detection unit 4 is sent to a control device (not shown), and when a change in the external field exceeding a set value is detected by the detection unit 4, the switching (not shown) connected to the control device.
- the circuit cuts off power and stops charging or discharging current. In this way, the deformation of the secondary battery due to the swelling of the unit cell 2 is detected with high sensitivity, and the secondary battery is prevented from bursting.
- This deformation detection sensor does not compress the volume of the secondary battery, and the sensor characteristics are stabilized by suppressing the positional deviation.
- one polymer matrix layer 3 and one detection unit 4 are shown, but a plurality of them may be used depending on various conditions such as the shape and size of the secondary battery. Good. At that time, the polymer matrix layer 3 attached as shown in FIG. 2 and the polymer matrix layer 3 attached as shown in FIG. 3 may coexist. Further, a plurality of polymer matrix layers 3 may be attached to the same unit cell 2, or a plurality of detectors 4 may be configured to detect changes in the external field due to deformation of the same polymer matrix layer 3. Good.
- the polymer matrix layer 3 contains a magnetic filler as the filler, and the detection unit 4 detects a change in the magnetic field as the external field.
- the polymer matrix layer 3 is preferably a magnetic elastomer layer in which a magnetic filler is dispersed in a matrix made of an elastomer component.
- the magnetic filler examples include rare earths, irons, cobalts, nickels, oxides, etc., but rare earths capable of obtaining higher magnetic force are preferable.
- the shape of the magnetic filler is not particularly limited, and may be spherical, flat, needle-like, columnar, or indefinite.
- the average particle size of the magnetic filler is preferably 0.02 to 500 ⁇ m, more preferably 0.1 to 400 ⁇ m, and still more preferably 0.5 to 300 ⁇ m. When the average particle size is smaller than 0.02 ⁇ m, the magnetic properties of the magnetic filler tend to be lowered, and when the average particle size exceeds 500 ⁇ m, the mechanical properties of the magnetic elastomer layer tend to be lowered and become brittle.
- the magnetic filler may be introduced into the elastomer after magnetization, but is preferably magnetized after being introduced into the elastomer. Magnetization after introduction into the elastomer facilitates control of the polarity of the magnet and facilitates detection of the magnetic field.
- the polymer matrix constituting the deformation detection sensor according to the present invention is characterized in that the glass transition temperature (Tg) is ⁇ 30 ° C. or lower.
- Tg glass transition temperature
- the polymer matrix layer has a storage elastic modulus E ′ (20 ° C.) at 20 ° C. and ⁇ 20 ° C.
- the ratio E ′ (20 ° C./ ⁇ 20° C.) to the storage elastic modulus E ′ ( ⁇ 20 ° C.) is 0.2 or more, and the storage elastic modulus E ′ (20 ° C.) at 20 ° C. and 60 ° C.
- the ratio E ′ (20 ° C./60° C.) to the storage elastic modulus E ′ (60 ° C.) at 5 is preferably 5 or less. Further, in order to make the elastic modulus of the polymer matrix layer appropriate and detect the deformation of the sealed secondary battery with higher sensitivity, the polymer matrix layer has a storage elastic modulus E ′ at 20 ° C. (20 ° C. ) Is preferably 5.0 MPa or less.
- an elastomer component can be used as the polymer matrix.
- the elastomer component those having a Tg within the above desired range can be arbitrarily used.
- a thermoplastic elastomer, a thermosetting elastomer, or a mixture thereof can be used as the elastomer component.
- thermoplastic elastomer examples include styrene-based thermoplastic elastomer, polyolefin-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, polyamide-based thermoplastic elastomer, polybutadiene-based thermoplastic elastomer, polyisoprene-based thermoplastic elastomer, A fluororubber-based thermoplastic elastomer can be used.
- thermosetting elastomer examples include polyisoprene rubber, polybutadiene rubber, styrene-butadiene rubber, polychloroprene rubber, nitrile rubber, diene synthetic rubber such as ethylene-propylene rubber, ethylene-propylene rubber, butyl rubber, acrylic rubber, Non-diene synthetic rubbers such as polyurethane rubber, fluorine rubber, silicone rubber, epichlorohydrin rubber, and natural rubber can be mentioned.
- a thermosetting elastomer is preferable because it can suppress the sag of the magnetic elastomer accompanying heat generation and overload of the battery. More preferred is polyurethane rubber (also referred to as polyurethane elastomer) or silicone rubber (also referred to as silicone elastomer).
- the polyurethane elastomer is obtained by reacting an active hydrogen-containing compound with an isocyanate component.
- an active hydrogen-containing compound and a magnetic filler are mixed, and an isocyanate component is mixed therein to obtain a mixed solution.
- a liquid mixture can also be obtained by mixing a magnetic filler with an isocyanate component and mixing an active hydrogen-containing compound. The mixed liquid is poured into a mold subjected to a release treatment, and then heated to a curing temperature and cured to produce a magnetic elastomer.
- a magnetic elastomer can be produced by adding a magnetic filler to a silicone elastomer precursor, mixing it, putting it in a mold, and then heating and curing it. In addition, you may add a solvent as needed.
- isocyanate component that can be used in the polyurethane elastomer
- compounds known in the field of polyurethane can be used.
- the isocyanate component may be modified such as urethane modification, allophanate modification, biuret modification, and isocyanurate modification.
- Preferred isocyanate components are 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4'-diphenylmethane disissocyanate, more preferably 2,4-toluene diisocyanate, 2,6-toluene diisocyanate.
- the active hydrogen-containing compound those usually used in the technical field of polyurethane can be used.
- Tg glass transition temperature
- the silicone-containing polyol has at least one active hydrogen group at the terminal and has a silicone moiety (Si—O—Si) in the main chain or side chain.
- the silicone-containing polyol has a silicone moiety in the main chain.
- a polyol or a polyol having a silicone moiety in the side chain can be used.
- a polyol having a silicone moiety in the main chain is preferred because it hardly causes phase separation in the polyurethane elastomer and the adhesiveness of the finally obtained polymer matrix is easily maintained.
- the number average molecular weight is preferably 1000 to 5000.
- the content of the silicone-containing polyol is preferably 20 to 80% by weight in the polymer matrix layer.
- silicone-containing polyol not only the silicone-containing polyol but also a compound known in the field of polyurethane can be used as the active hydrogen-containing compound.
- Polyester polyol such as polyester polyol, polycaprolactone polyol, reaction product of polyester glycol and alkylene carbonate such as polycaprolactone, and the like, and the reaction of the resulting reaction mixture with organic polyol.
- Polyester polycarbonate polyol reacted with dicarboxylic acid, esterification of polyhydroxyl compound and aryl carbonate High molecular weight polyol polycarbonate polyols obtained by the reaction can be mentioned. These may be used alone or in combination of two or more.
- Preferred active hydrogen-containing compounds are polytetramethylene glycol, polypropylene glycol, a copolymer of propylene oxide and ethylene oxide, 3-methyl-1,5-pentane adipate, more preferably a copolymer of polypropylene glycol, propylene oxide and ethylene oxide. It is a coalescence.
- NCO index is preferably 0.3 to 1.2, more preferably 0.5 to 1.1, and still more preferably 0.7 to 1.05.
- NCO index is smaller than 0.3, the magnetic elastomer tends to be insufficiently cured.
- the NCO index is larger than 1.2, the elastic modulus increases and the sensor sensitivity tends to decrease.
- the amount of the magnetic filler in the magnetic elastomer is preferably 1 to 450 parts by weight, more preferably 2 to 400 parts by weight with respect to 100 parts by weight of the elastomer component. If it is less than 1 part by weight, it tends to be difficult to detect a change in the magnetic field, and if it exceeds 450 parts by weight, the magnetic elastomer itself may become brittle.
- a magnetoresistive element for example, a magnetoresistive element, a Hall element, an inductor, an MI element, a fluxgate sensor, or the like can be used as the detection unit 4 that detects a change in the magnetic field.
- the magnetoresistive element include a semiconductor compound magnetoresistive element, an anisotropic magnetoresistive element (AMR), a giant magnetoresistive element (GMR), and a tunnel magnetoresistive element (TMR).
- AMR anisotropic magnetoresistive element
- GMR giant magnetoresistive element
- TMR tunnel magnetoresistive element
- the Hall element is preferable because it is useful as the detection unit 4 having high sensitivity over a wide range.
- the thickness of the polymer matrix layer 3 in an uncompressed state is preferably 300 to 3000 ⁇ m, more preferably 400 to 2000 ⁇ m, and still more preferably 500 to 1500 ⁇ m.
- the thickness is smaller than 300 ⁇ m, the handling property tends to be deteriorated due to brittleness when a required amount of filler is added.
- the thickness is larger than 3000 ⁇ m, the polymer matrix layer 3 is excessively compressed and hardly deformed when disposed in the gap as described above, and the sensor sensitivity may be lowered.
- the polymer matrix layer 3 may be a non-foamed body that does not contain bubbles, but may be a foam containing bubbles from the viewpoint of improving stability and sensor sensitivity, and further from the viewpoint of weight reduction. Good.
- a general resin foam can be used for the foam, but it is preferable to use a thermosetting resin foam in consideration of characteristics such as compression set.
- the thermosetting resin foam include a polyurethane resin foam and a silicone resin foam. Among these, a polyurethane resin foam is preferable.
- the above-mentioned isocyanate component and active hydrogen-containing compound can be used for the polyurethane resin foam.
- a known catalyst can be used without limitation, but triethylenediamine (1,4-diazabicyclo [2,2,2] octane), N, N, N ′, N ′.
- -Tertiary amine catalysts such as tetramethylhexanediamine and bis (2-dimethylaminoethyl) ether, and metal catalysts such as tin octylate, lead octylate, zinc octylate, and bismuth octylate can be used. These may be used alone or in combination of two or more.
- the foam stabilizer used for the polyurethane resin foam for example, a silicone foam stabilizer, a fluorine foam stabilizer, or the like used in the production of a normal polyurethane resin foam can be used.
- the silicone-based surfactant and fluorine-based surfactant used as the silicone-based foam stabilizer and the fluorine-based foam stabilizer have a polyurethane-soluble part and an insoluble part in the molecule.
- the insoluble part uniformly disperses the polyurethane material and lowers the surface tension of the polyurethane system, so that bubbles are easily generated and are hard to break. Of course, if the surface tension is too low, bubbles are not easily generated. Become.
- the dimethylpolysiloxane structure as the insoluble part can reduce the cell diameter or increase the number of cells. It becomes.
- silicone foam stabilizers examples include “SF-2962,” “SRX 274DL,” “SF-2965,” “SF-2904,” “SF-2908,” manufactured by Toray Dow Corning, "SF-2904", “L5340”, Evonik Degussa AG of “Tegosutabu (Tegostab R) B8017, B- 8465, B-8443 “ and the like.
- SF-2904" SRX 274DL
- SF-2965 SF-2904
- SF-2908 manufactured by Toray Dow Corning
- the blending amount of the foam stabilizer is preferably 1 to 15 parts by mass, more preferably 2 to 12 parts by mass with respect to 100 parts by mass of the resin component. If the blending amount of the foam stabilizer is less than 1 part by mass, foaming is not sufficient, and if it exceeds 15 parts by mass, bleeding may occur.
- the foam content of the foam forming the polymer matrix layer 3 is preferably 20 to 80% by volume.
- the bubble content is 20% by volume or more, the polymer matrix layer 3 is flexible and easily deformed, and the sensor sensitivity can be improved satisfactorily. Further, when the bubble content is 80% by volume or less, embrittlement of the polymer matrix layer 3 is suppressed, and handling properties and stability are improved.
- the bubble content is calculated based on the specific gravity measured according to JIS Z-8807-1976 and the specific gravity value of the non-foamed material.
- the average cell diameter of the foam forming the polymer matrix layer 3 is preferably 50 to 300 ⁇ m.
- the average opening diameter of the foam is preferably 15 to 100 ⁇ m.
- the stability of the sensor characteristics tends to deteriorate due to an increase in the amount of the foam stabilizer.
- the average bubble diameter exceeds 300 ⁇ m or the average opening diameter exceeds 100 ⁇ m, the contact area with a single cell to be detected tends to decrease and stability tends to decrease.
- the average bubble diameter and the average opening diameter were determined by observing the cross section of the polymer matrix layer with a SEM at a magnification of 100 times, and using the image analysis software for the obtained image, all the bubbles present in the arbitrary range of the cross section. The bubble diameter and the opening diameter of all open bubbles are measured and calculated from the average value.
- the closed cell ratio of the foam forming the polymer matrix layer 3 is preferably 5 to 70%. Thereby, excellent stability can be exhibited while ensuring ease of compression of the polymer matrix layer 3.
- the volume fraction of the filler (magnetic filler in the present embodiment) with respect to the foam forming the polymer matrix layer 3 is preferably 1 to 30% by volume.
- the polyurethane resin foam described above can be produced by an ordinary method for producing a polyurethane resin foam except that it contains a magnetic filler.
- the method for producing a polyurethane resin foam containing the magnetic filler includes, for example, the following steps (i) to (v).
- Step of forming isocyanate group-containing urethane prepolymer from polyisocyanate component and active hydrogen component (ii) Mixing and pre-stirring the isocyanate group-containing urethane prepolymer, foam stabilizer, catalyst and magnetic filler, and non-reacting A primary stirring step of vigorously stirring so as to take in bubbles in a natural gas atmosphere (iii) a step of further adding an active hydrogen component and secondary stirring to prepare a cell-dispersed urethane composition containing a magnetic filler (iv) A step of forming the urethane-dispersed urethane composition into a desired shape and curing to produce a urethane resin foam containing a magnetic filler. (V) A step of magnetizing the urethane resin foam to form a magnetic urethane resin foam.
- a chemical foaming method using a reactive foaming agent such as water is known.
- an isocyanate group-containing urethane prepolymer such as steps (ii) and (iii) described above.
- a mechanical foaming method in which a mixture containing a foaming agent, a catalyst and a magnetic filler and an active hydrogen component are mechanically stirred in a non-reactive gas atmosphere.
- the molding operation is simpler than the chemical foaming method, and water is not used as the foaming agent. Therefore, the molded product has tough and excellent resilience (restorability) with fine bubbles. Is obtained.
- an isocyanate group-containing urethane prepolymer is formed from a polyisocyanate component and an active hydrogen component as in the step (i), and an isocyanate group-containing urethane prepolymer and a foam stabilizer as in the primary stirring step (ii). Then, the catalyst and the magnetic filler are mixed, pre-stirred, and vigorously stirred so as to take in bubbles in a non-reactive gas atmosphere, and the active hydrogen component is further added as in the secondary stirring step (iii). Stir vigorously to prepare a cell-dispersed urethane composition containing a magnetic filler.
- a method for forming a polyurethane resin foam after forming an isocyanate group-containing urethane prepolymer in advance is as follows. It is known to those skilled in the art, and the production conditions can be appropriately selected depending on the compounding material.
- the blending ratio of the polyisocyanate component and the active hydrogen component is the ratio of the isocyanate group in the polyisocyanate component to the active hydrogen group in the active hydrogen component (isocyanate group / active hydrogen).
- the group) is selected to be 1.5 to 5, preferably 1.7 to 2.3.
- the reaction temperature is preferably 60 to 120 ° C., and the reaction time is preferably 3 to 8 hours.
- conventionally known urethanization catalysts and organic catalysts such as lead octylate marketed by Toei Chemical Co., Ltd.
- any apparatus can be used as long as it can react by stirring and mixing the above materials under the above-described conditions, and an apparatus used for ordinary polyurethane production can be used. it can.
- a method using a general mixer capable of mixing a liquid resin and a filler can be used, and examples thereof include a homogenizer, a dissolver, and a planetary mixer.
- the foam stabilizer is added to the isocyanate group-containing urethane prepolymer side and stirred (primary stirring), and in the step (iii), the active hydrogen component is further added and the secondary stirring is performed. It is preferable because bubbles taken into the reaction system are difficult to escape and efficient foaming can be performed.
- the non-reactive gas in the step (ii) is preferably a non-flammable gas, and specifically, nitrogen, oxygen, carbon dioxide gas, helium, argon and other rare gases, and mixed gases thereof are exemplified, and dried to moisture. It is most preferable to use air from which air has been removed.
- the conditions for the primary stirring and the secondary stirring, particularly the primary stirring can be used at the time of urethane foam production by a normal mechanical foaming method, and are not particularly limited. Using a mixer, vigorously stir for 1 to 30 minutes at a rotational speed of 1000 to 10000 rpm. Examples of such an apparatus include a homogenizer, a dissolver, and a mechanical floss foaming machine.
- the method of forming the cell-dispersed urethane composition into a desired shape such as a sheet is not particularly limited.
- a batch type in which the mixed solution is injected into a mold subjected to a release treatment and cured.
- a molding method or a continuous molding method in which the cell-dispersed urethane composition is continuously supplied and cured on a release-treated face material can be used.
- the curing conditions are not particularly limited, and are preferably 60 to 200 ° C. for 10 minutes to 24 hours. If the curing temperature is too high, the resin foam is thermally deteriorated and mechanical strength is deteriorated. If it is too low, curing failure of the resin foam will occur. On the other hand, if the curing time is too long, the resin foam is thermally deteriorated and mechanical strength is deteriorated. If the curing time is too short, the resin foam is poorly cured.
- the method for magnetizing the magnetic filler is not particularly limited, and a commonly used magnetizing device, for example, “ES-10100-15SH” manufactured by Electromagnetic Industry Co., Ltd., “TM” manufactured by Tamagawa Manufacturing Co., Ltd. -YS4E "or the like. Usually, a magnetic field having a magnetic flux density of 1 to 3T is applied.
- the magnetic filler may be added in the step (ii) for forming the magnetic filler dispersion after magnetization, but from the viewpoint of handling workability of the magnetic filler in the intermediate step, the magnetic filler is added in the step (v). It is preferable to magnetize.
- the polymer is sandwiched between the unit cells 2 adjacent to each other as shown in FIG. 2 or between the unit cell 2 and the housing 11 that houses the unit cell as shown in FIG.
- the matrix layer 3 is mounted in a compressed state.
- the polymer matrix layer 3 is sandwiched in the gap between the adjacent unit cells 2 (see FIG. 2), and the example is sandwiched in the gap between the unit cell 2 and the housing 11 (see FIG. 2).
- the present invention is not limited to this.
- the polymer matrix layer may be sandwiched between the casing of a battery module included in the battery pack and the casing of the adjacent battery module, that is, within the gap between the casings of adjacent battery modules.
- the polymer matrix layer may be sandwiched in the gap between the battery module housing and the battery pack housing.
- the polymer matrix layer may be disposed in the unit cell, for example, between the positive electrode and the separator, between the negative electrode and the separator, or between the positive electrode and the outer package, between the negative electrode and the outer package, Furthermore, it may be disposed so as to be sandwiched between the separator and the outer package, and in particular, when used as a deformation detection sensor for a cylindrical or rectangular unit cell configured by winding a positive electrode / separator / negative electrode. Useful in.
- the polymer matrix layer containing the filler dispersed therein is formed as a single layer, but a configuration in which the filler is unevenly distributed in the thickness direction may be used.
- a method of unevenly distributing the filler when the polymer matrix layer is composed of a single layer for example, after introducing the filler into the elastomer component, it is allowed to stand at room temperature or a predetermined temperature, and is allowed to settle spontaneously by the weight of the filler.
- the method can be used, and the filler uneven distribution rate can be adjusted by changing the standing temperature and time.
- the filler may be unevenly distributed using a physical force such as centrifugal force or magnetic force.
- the polymer matrix layer containing the filler dispersed therein is formed as a single layer, but the polymer matrix layer may have a laminated structure.
- the polymer matrix layer having such a laminated structure for example, two polymer matrix layers having different filler concentrations may be laminated, or an elastomer layer containing no filler and a polymer containing filler at an arbitrary concentration.
- a matrix layer may be laminated.
- a polymer matrix layer having a laminated structure one may be composed of a foam layer and the other may be a non-foam layer.
- a polymer matrix layer with a low filler concentration or an elastomer layer containing no filler may be foamed. It may be composed of layers.
- the polymer matrix layer may contain conductive fillers such as metal particles, carbon black, and carbon nanotubes as fillers, and the detector may detect changes in the electric field (changes in resistance and dielectric constant) as external fields. It is done.
- a sealing material may be provided to such an extent that the flexibility of the polymer matrix layer is not impaired.
- a thermoplastic resin a thermosetting resin, or a mixture thereof can be used.
- the thermoplastic resin include styrene-based thermoplastic elastomers, polyolefin-based thermoplastic elastomers, polyurethane-based thermoplastic elastomers, polyester-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, polybutadiene-based thermoplastic elastomers, polyisoprene-based thermoplastic elastomers, Fluorine-based thermoplastic elastomer, ethylene / ethyl acrylate copolymer, ethylene / vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, chlorinated polyethylene, fluororesin, polyamide, polyethylene, polypropylene, polyethylene terephthalate, polybutylene
- thermosetting resin examples include polyisoprene rubber, polybutadiene rubber, styrene / butadiene rubber, polychloroprene rubber, diene-based synthetic rubber such as acrylonitrile / butadiene rubber, ethylene / propylene rubber, ethylene / propylene / diene rubber, butyl rubber, Non-diene rubbers such as acrylic rubber, polyurethane rubber, fluorine rubber, silicone rubber, epichlorohydrin rubber, natural rubber, polyurethane resin, silicone resin, epoxy resin and the like can be mentioned.
- a film-like material can be suitably used. These films may be laminated, or may be a film including a metal foil such as an aluminum foil or a metal vapor deposition film in which a metal is vapor deposited on the film.
- Polyol A Polyoxypropylene glycol obtained by adding propylene oxide to glycerol as an initiator, OHV56, functional group number 3 (EX-3030, manufactured by Asahi Glass Co., Ltd.).
- Polyol B Polyoxypropylene glycol obtained by adding propylene oxide to propylene glycol as an initiator, OHV56, functional group number 2 (EX-2020 manufactured by Asahi Glass Co., Ltd.).
- Polyol C polyether-modified main chain type reactive silicone, OHV56, functional group number 2 (manufactured by Shin-Etsu Chemical Co., Ltd., X-22-4272).
- Polyol D polyether-modified main chain type reactive silicone, OHV112, functional group number 2 (manufactured by JNC, FM-4411).
- Polyol E polyether modified main chain type reactive silicone, OHV22, functional group number 2 (manufactured by JNC, FM-4421).
- Polyol F polyether modified main chain type reactive silicone, OHV11, functional group number 2 (manufactured by JNC, FM-4425).
- Polyol G polyether-modified side chain type reactive silicone, OHV112, functional group number 2 (manufactured by JNC, FM-DA11).
- Polyol H polyether modified side chain type reactive silicone, OHV22, functional group number 2 (manufactured by JNC, FM-DA21).
- Polyol I Polyoxypropylene glycol obtained by adding propylene oxide to glycerol as an initiator, OHV168, functional group number 3 (Asahi Glass Co., Ltd., EX-1030)
- Polyol J Polyoxypropylene glycol obtained by adding propylene oxide to glycerol as an initiator, OHV865, functional group number 3 (Asahi Glass Co., Ltd., EX-890MP)
- Bismuth octylate Pucat 25 (Nippon Chemical Industry Co., Ltd.)
- prepolymer A prepolymer A and / or prepolymer B shown in Table 1 were used.
- the filler dispersion liquid was added to this prepolymer solution, and mixing and defoaming were carried out using a rotation / revolution mixer (manufactured by Shinky Corporation).
- the reaction solution was dropped onto a release-treated PET film having a 1.0 mm spacer and adjusted to a thickness of 1.0 mm with a nip roll. Then, it hardened
- the obtained polyurethane elastomer was magnetized at 2.0 T with a magnetizing device (manufactured by Electronic Magnetic Industry Co., Ltd.) to obtain a magnetic polyurethane elastomer.
- Table 2 The formulation and production conditions are shown in Table 2.
- Example 2-6 Comparative Examples 1-2 Based on the formulation and production conditions in Table 2, a magnetic polyurethane resin was obtained in the same manner as in Example 1.
- the battery body was charged at a constant current of up to 4.3 V with a charging current of 1.44 A, and after reaching 4.3 V, 0.07 A
- the battery was charged at a constant voltage until the current value decreased.
- the open circuit state was maintained for 10 minutes, and then a constant current discharge was performed to 3.0 V at a current of 1.44 A.
- the charge / discharge process was repeated 200 cycles.
- the change in thickness and the change in magnetic flux density with respect to the initial value after 200 cycles were measured. Here, it shows that the sensitivity as a sensor is so high that a magnetic flux density change is large.
- the cycle characteristics were measured under the same conditions as in the normal temperature cycle except that the temperature of the low temperature cycle thermostat was set to -20 ° C.
- the cycle characteristics were measured under the same conditions as in the normal temperature cycle except that the temperature of the high-temperature cycle thermostat was changed to 60 ° C.
Abstract
Description
下記式により算出可能である。
シリコーン含有量(wt%)=反応性シリコーン重量(g)/全樹脂成分量(g)×100
上記「全樹脂成分量」とは、フィラー成分量を除くことを意味し、さらには全樹脂成分量(g)=高分子マトリックス層の重量(g)-フィラーの重量(g)を意味するものとする。
(i)ポリイソシアネート成分および活性水素成分からイソシアネート基含有ウレタンプレポリマーを形成する工程
(ii)該イソシアネート基含有ウレタンプレポリマー、整泡剤、触媒および磁性フィラーを混合、予備撹拌して、非反応性気体雰囲気下で、気泡を取り込むように激しく撹拌する一次撹拌工程
(iii)更に活性水素成分を加えて、二次撹拌して、磁性フィラーを含む気泡分散ウレタン組成物を調製する工程
(iv)該気泡分散ウレタン組成物を所望の形状に成形し、硬化して、磁性フィラーを含むウレタン樹脂フォームを作製する工程
(v)該ウレタン樹脂フォームを着磁して磁性ウレタン樹脂フォームを形成する工程
TDI-80:トルエンジイソシアネート(三井化学社製、2,4-体=80%、コスモネートT-80)
ポリオールA:グリセリンを開始剤にプロピレンオキサイドを付加したポリオキシプロピレングリコール、OHV56、官能基数3(旭硝子社製、EX-3030)。
ポリオールB:プロピレングリコールを開始剤にプロピレンオキサイドを付加したポリオキシプロピレングリコール、OHV56、官能基数2(旭硝子社製、EX-2020)。
ポリオールC:ポリエーテル変性主鎖型反応性シリコーン、OHV56、官能基数2(信越化学社製、X-22-4272)。
ポリオールD:ポリエーテル変性主鎖型反応性シリコーン、OHV112、官能基数2(JNC社製、FM-4411)。
ポリオールE:ポリエーテル変性主鎖型反応性シリコーン、OHV22、官能基数2(JNC社製、FM-4421)。
ポリオールF:ポリエーテル変性主鎖型反応性シリコーン、OHV11、官能基数2(JNC社製、FM-4425)。
ポリオールG:ポリエーテル変性側鎖型反応性シリコーン、OHV112、官能基数2(JNC社製、FM-DA11)。
ポリオールH:ポリエーテル変性側鎖型反応性シリコーン、OHV22、官能基数2(JNC社製、FM-DA21)。
ポリオールI:グリセリンを開始剤にプロピレンオキサイドを付加したポリオキシプロピレングリコール、OHV168、官能基数3(旭硝子社製、EX-1030)
ポリオールJ:グリセリンを開始剤にプロピレンオキサイドを付加したポリオキシプロピレングリコール、OHV865、官能基数3(旭硝子社製、EX-890MP)
ネオジム系フィラー:MF-15P(平均粒径:133μm, 愛知製鋼社製)
オクチル酸ビスマス:プキャット25(日本化学産業社製)
反応容器に、ポリオールAを85.2重量部入れ、撹拌しながら減圧脱水を1時間行った。その後、反応容器内を窒素置換した。次いで、反応容器にTDI-80を14.8重量部添加して、反応容器内の温度を80℃に保持しながら5時間反応させて、イソシアネート末端プレポリマーA(NCO%=3.58%)を合成した。
表2の配合および製造条件に基づき、実施例1と同様にして磁性ポリウレタン樹脂を得た。
ガラス転移点(Tg)、および貯蔵弾性率(E’)は動的粘弾性測定装置(メトラー・トレド社製、DMA861e)を用いて下記の条件で測定した。また、該測定で得られたtanδのピークトップ温度をガラス転移温度とした。
測定モード:引張モード
周波数:1Hz
昇温速度:2.5℃/min
測定温度範囲:-100~100℃
サンプル形状:長さ19.5mm、幅3.0mm、厚み1.0mm
作製した磁性ポリウレタンエラストマーを10mm×30mmの大きさに切り出し、1.44Ahの電池体(サイズ:縦90mm×横30mm×厚み4mm)に両面テープ(積水化学工業社製、ダブルタックテープ#5782)で貼り付けた。この電池体を上面の一部が開口したアルミニウム製の筐体(厚み5mm)に取り付けた。前記筐体の開口部を通して、電池体の膨れをレーザー変位計(キーエンス社製、LK-G400)にて測定し、厚み変化量とした。
作製した磁性ポリウレタンエラストマーを10mm×30mmの大きさに切り出し、1.44Ahの電池体(サイズ:縦90mm×横30mm×厚み4mm)に両面テープ(積水化学工業社製、ダブルタックテープ#5782)で貼り付けた。この電池体を上面の一部が開口したアルミニウム製の筐体(厚み5.0mm)に取り付けた。前記筐体の上面にホール素子(旭化成エレクトロニクス株式会社製、EQ-430L)を取り付けた。
・常温サイクル
この筐体を20℃の恒温槽に入れ、120分静置後、電池体を1.44Aの充電電流で4.3Vまで定電流充電し、4.3Vに到達後、0.07Aに電流値が減衰するまで定電圧充電を行った。その後、10分間、開回路状態を保持した後、1.44Aの電流で3.0Vまで定電流放電を行った。上記充放電の工程を200サイクル繰り返した。200サイクル後の初期値に対する厚み変化と、磁束密度変化を測定した。ここで、磁束密度変化が大きいほどセンサとしての感度が高いことを示す。
・低温サイクル
恒温槽の温度を-20℃にした以外は、常温サイクルの場合と同様の条件にてサイクル特性を測定した。
・高温サイクル
恒温槽の温度を60℃にした以外は、常温サイクルの場合と同様の条件にてサイクル特性を測定した。
2 単電池
3 高分子マトリックス層
4 検出部
6 容器
11 筐体
Claims (9)
- 密閉型二次電池の変形検出センサにおいて、
高分子マトリックス層と、検出部とを備え、
前記高分子マトリックス層は、その高分子マトリックス層の変形に応じて外場に変化を与えるフィラーを分散させて含有し、前記検出部は前記外場の変化を検出し、
前記高分子マトリックス層は、ガラス転移温度(Tg)が-30℃以下であることを特徴とする密閉型二次電池の変形検出センサ。 - 前記高分子マトリックス層は、前記フィラーとしての磁性フィラーを含有し、
前記検出部は、前記外場としての磁場の変化を検出する請求項1に記載の密閉型二次電池の変形検出センサ。 - 前記高分子マトリックス層は、20℃での貯蔵弾性率E’(20℃)と-20℃での貯蔵弾性率E’(-20℃)との比E’(20℃/-20℃)が0.2以上であり、かつ20℃での貯蔵弾性率E’(20℃)と60℃での貯蔵弾性率E’(60℃)との比E’(20℃/60℃)が5以下である請求項1または2に記載の密閉型二次電池の変形検出センサ。
- 前記高分子マトリックス層は、20℃での貯蔵弾性率E’(20℃)が5.0MPa以下である請求項1~3いずれか1項に記載の密閉型二次電池の変形検出センサ。
- 前記高分子マトリックス層は、活性水素含有化合物と、イソシアネート成分とを反応させることにより得られるポリウレタンエラストマーであり、前記活性水素含有化合物はシリコーン含有ポリオールを含むものである請求項1~4いずれか1項に記載の密閉型二次電池の変形検出センサ。
- 前記シリコーン含有ポリオールの数平均分子量(Mn)が1000~5000であり、かつ前記高分子マトリックス層中、前記シリコーン含有ポリオールの含有量が20~80重量%である請求項1~5いずれか1項に記載の密閉型二次電池の変形検出センサ。
- 請求項1~6いずれか1項に記載の変形検出センサが取り付けられた密閉型二次電池。
- 密閉型二次電池の変形検出方法において、
前記密閉型二次電池が有する間隙内に高分子マトリックス層を装着し、
前記高分子マトリックス層は、その高分子マトリックス層の変形に応じて外場に変化を与えるフィラーを分散させて含有し、かつガラス転移温度(Tg)が-30℃以下であり、
前記高分子マトリックス層の変形に伴う前記外場の変化を検出し、それに基づいて前記密閉型二次電池の変形を検出することを特徴とする密閉型二次電池の変形検出方法。 - 前記高分子マトリックス層は、前記密閉型二次電池が有する間隙内で挟まれて圧縮状態で装着される請求項8に記載の密閉型二次電池の変形検出方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016531221A JP6296670B2 (ja) | 2014-06-30 | 2015-06-10 | 密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法 |
EP15814214.1A EP3163649B1 (en) | 2014-06-30 | 2015-06-10 | Sensor for detecting deformation of sealed secondary battery, sealed secondary battery, and method for detecting deformation of sealed secondary battery |
US15/306,612 US20170045378A1 (en) | 2014-06-30 | 2015-06-10 | Sensor for detecting deformation of sealed secondary battery, sealed secondary battery, and method for detecting deformation of sealed secondary battery |
CN201580027716.3A CN106415880A (zh) | 2014-06-30 | 2015-06-10 | 密闭型二次电池的变形检测传感器、密闭型二次电池、及密闭型二次电池的变形检测方法 |
KR1020167036351A KR20170009992A (ko) | 2014-06-30 | 2015-06-10 | 밀폐형 2차 전지의 변형 검출 센서, 밀폐형 2차 전지, 및, 밀폐형 2차 전지의 변형 검출 방법 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-134509 | 2014-06-30 | ||
JP2014134509 | 2014-06-30 | ||
JP2014-234466 | 2014-11-19 | ||
JP2014234466 | 2014-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016002454A1 true WO2016002454A1 (ja) | 2016-01-07 |
Family
ID=55019003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/066754 WO2016002454A1 (ja) | 2014-06-30 | 2015-06-10 | 密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20170045378A1 (ja) |
EP (1) | EP3163649B1 (ja) |
JP (1) | JP6296670B2 (ja) |
KR (1) | KR20170009992A (ja) |
CN (1) | CN106415880A (ja) |
TW (1) | TWI557965B (ja) |
WO (1) | WO2016002454A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018078912A1 (ja) * | 2016-10-28 | 2018-05-03 | 東洋ゴム工業株式会社 | 密閉型二次電池の変形検出センサ、及び密閉型二次電池 |
CN113240658A (zh) * | 2021-05-25 | 2021-08-10 | 中国矿业大学 | 一种基于机器视觉的电池充电系统及方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6890956B2 (ja) * | 2015-12-10 | 2021-06-18 | 株式会社半導体エネルギー研究所 | 蓄電装置及び電子機器 |
CN108899594B (zh) * | 2018-06-12 | 2020-05-19 | 天津力神电池股份有限公司 | 一种锂金属负极膨胀幅度的分析方法 |
CN209217029U (zh) * | 2018-12-29 | 2019-08-06 | 宁德时代新能源科技股份有限公司 | 二次电池以及电池模组 |
CN111106301B (zh) * | 2019-04-02 | 2021-02-26 | 宁德时代新能源科技股份有限公司 | 二次电池以及电池模组 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5939A (ja) * | 1982-04-21 | 1984-01-05 | ユニバ−シテイ・オブ・ストラスクライド | 変位検出トランスジユ−サ |
JP2008234840A (ja) * | 2007-03-16 | 2008-10-02 | Katsumasa Ishihara | 保護装置 |
WO2012073770A1 (ja) * | 2010-11-30 | 2012-06-07 | 東海ゴム工業株式会社 | 蓄電デバイス |
JP2013195331A (ja) * | 2012-03-22 | 2013-09-30 | Jsr Corp | 異方導電性シートおよびその用途 |
WO2014061684A1 (ja) * | 2012-10-19 | 2014-04-24 | 東洋ゴム工業株式会社 | センサーおよびその製造方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3690849B2 (ja) * | 1995-09-19 | 2005-08-31 | テイ・エス テック株式会社 | 表皮一体成形用金型 |
JP2002294149A (ja) * | 2001-03-29 | 2002-10-09 | Toyoda Gosei Co Ltd | 磁性塗料 |
CA2503157A1 (en) * | 2003-03-10 | 2004-09-23 | Dainippon Ink And Chemicals, Inc. | Conductive resin composition, process for producing the same and separator for a fuel cell |
KR100579377B1 (ko) | 2004-10-28 | 2006-05-12 | 삼성에스디아이 주식회사 | 이차 전지 |
EP1856097B1 (en) * | 2005-02-16 | 2012-07-11 | Schering Corporation | Pyridyl and phenyl substituted piperazine-piperidines with cxcr3 antagonist activity |
KR100889244B1 (ko) * | 2005-04-20 | 2009-03-17 | 주식회사 엘지화학 | 압전 센서가 내장된 이차전지 모듈 |
US8024149B2 (en) * | 2006-08-03 | 2011-09-20 | Titanium Metals Corporation | Overheat detection system |
US20080109363A1 (en) * | 2006-11-02 | 2008-05-08 | Yahoo! Inc. | System and method for generating revenue for publishers of multimedia content over a network |
JP2009076265A (ja) * | 2007-09-19 | 2009-04-09 | Panasonic Corp | 電池パック |
US8496648B2 (en) * | 2008-05-27 | 2013-07-30 | Intuitive Surgical Operations, Inc. | Stiffening assembly |
KR20110117153A (ko) * | 2009-01-16 | 2011-10-26 | 닛토덴코 가부시키가이샤 | 가교형 수지 발포체 및 그의 제조방법 |
JP2013171697A (ja) | 2012-02-21 | 2013-09-02 | Auto Network Gijutsu Kenkyusho:Kk | 温度センサの取り付け構造 |
JP5900039B2 (ja) * | 2012-03-08 | 2016-04-06 | 富士通株式会社 | 薄膜グラファイトを含有する構造体の製造方法、及び電気部品 |
JP6141720B2 (ja) * | 2012-10-19 | 2017-06-07 | 東洋ゴム工業株式会社 | 触覚センサー |
-
2015
- 2015-06-10 US US15/306,612 patent/US20170045378A1/en not_active Abandoned
- 2015-06-10 JP JP2016531221A patent/JP6296670B2/ja not_active Expired - Fee Related
- 2015-06-10 CN CN201580027716.3A patent/CN106415880A/zh active Pending
- 2015-06-10 KR KR1020167036351A patent/KR20170009992A/ko not_active Application Discontinuation
- 2015-06-10 WO PCT/JP2015/066754 patent/WO2016002454A1/ja active Application Filing
- 2015-06-10 EP EP15814214.1A patent/EP3163649B1/en not_active Not-in-force
- 2015-06-15 TW TW104119227A patent/TWI557965B/zh not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5939A (ja) * | 1982-04-21 | 1984-01-05 | ユニバ−シテイ・オブ・ストラスクライド | 変位検出トランスジユ−サ |
JP2008234840A (ja) * | 2007-03-16 | 2008-10-02 | Katsumasa Ishihara | 保護装置 |
WO2012073770A1 (ja) * | 2010-11-30 | 2012-06-07 | 東海ゴム工業株式会社 | 蓄電デバイス |
JP2013195331A (ja) * | 2012-03-22 | 2013-09-30 | Jsr Corp | 異方導電性シートおよびその用途 |
WO2014061684A1 (ja) * | 2012-10-19 | 2014-04-24 | 東洋ゴム工業株式会社 | センサーおよびその製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3163649A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018078912A1 (ja) * | 2016-10-28 | 2018-05-03 | 東洋ゴム工業株式会社 | 密閉型二次電池の変形検出センサ、及び密閉型二次電池 |
JP2018073636A (ja) * | 2016-10-28 | 2018-05-10 | 東洋ゴム工業株式会社 | 密閉型二次電池の変形検出センサ、及び密閉型二次電池 |
CN113240658A (zh) * | 2021-05-25 | 2021-08-10 | 中国矿业大学 | 一种基于机器视觉的电池充电系统及方法 |
CN113240658B (zh) * | 2021-05-25 | 2024-02-02 | 中国矿业大学 | 一种基于机器视觉的电池充电系统及方法 |
Also Published As
Publication number | Publication date |
---|---|
TWI557965B (zh) | 2016-11-11 |
KR20170009992A (ko) | 2017-01-25 |
TW201607104A (zh) | 2016-02-16 |
EP3163649A4 (en) | 2017-05-03 |
EP3163649B1 (en) | 2019-03-27 |
EP3163649A1 (en) | 2017-05-03 |
JP6296670B2 (ja) | 2018-03-20 |
US20170045378A1 (en) | 2017-02-16 |
JPWO2016002454A1 (ja) | 2017-04-27 |
CN106415880A (zh) | 2017-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6186339B2 (ja) | 密閉型二次電池の監視センサ、密閉型二次電池、及び、密閉型二次電池の監視方法 | |
JP6296670B2 (ja) | 密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法 | |
JP6265847B2 (ja) | 密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法 | |
JP6356583B2 (ja) | 密閉型二次電池の監視センサ、密閉型二次電池、及び、密閉型二次電池の監視方法 | |
JP6315824B2 (ja) | 密閉型二次電池の変形検出センサ | |
JP6339439B2 (ja) | 密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法 | |
WO2016080027A1 (ja) | 密閉型二次電池の変形検出センサの製造方法 | |
JP6290727B2 (ja) | 密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法 | |
JP6310806B2 (ja) | 密閉型二次電池の変形検出センサおよびその製造方法、密閉型二次電池、ならびに密閉型二次電池の変形検出方法 | |
JP6310805B2 (ja) | 密閉型二次電池の変形検出センサおよびその製造方法、密閉型二次電池、ならびに密閉型二次電池の変形検出方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15814214 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016531221 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15306612 Country of ref document: US |
|
REEP | Request for entry into the european phase |
Ref document number: 2015814214 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2015814214 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20167036351 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |