WO2014098348A1 - 배터리 모듈용 발열시트 및 이를 포함하는 배터리 모듈 - Google Patents
배터리 모듈용 발열시트 및 이를 포함하는 배터리 모듈 Download PDFInfo
- Publication number
- WO2014098348A1 WO2014098348A1 PCT/KR2013/007635 KR2013007635W WO2014098348A1 WO 2014098348 A1 WO2014098348 A1 WO 2014098348A1 KR 2013007635 W KR2013007635 W KR 2013007635W WO 2014098348 A1 WO2014098348 A1 WO 2014098348A1
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- WIPO (PCT)
- Prior art keywords
- heating element
- planar heating
- battery cell
- battery module
- area
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/013—Heaters using resistive films or coatings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2214/00—Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
- H05B2214/04—Heating means manufactured by using nanotechnology
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Definitions
- a heating module for a battery module and a battery module including the same.
- Batteries used in solar power and electric vehicles have a problem that the discharge efficiency is lowered in winter because the temperature is lowered. That is, when the external air temperature is lowered to about -20 ° C or lower, the discharge efficiency of the battery is lowered to about 50% or lower, and in an environment where the ambient temperature is about -10 ° C or lower, the battery has a low mobility of ions in the electrolyte, resulting in a flow of current. It gets worse and at the same time the output of the battery drops. In particular, in the case of an EV car, when the vehicle is parked outside in a fully charged state, the electrolyte becomes hard due to the external temperature, which causes a problem in the long life of the battery. Therefore, in order to maintain a constant battery life and efficiency, it is necessary to keep the battery temperature constant even in winter.
- thermoelectric element As a method of heating a battery, a method of heating air with a thermoelectric element or a positive temperature coefficient (PTC) heater has been proposed, but research on a method of directly heating the battery in a more effective and efficient manner has been continued.
- PTC positive temperature coefficient
- One embodiment of the present invention provides a heat generating sheet for a battery module capable of heating the battery cells uniformly and effectively with a minimum heat generating area.
- Another embodiment of the present invention provides a battery module including the heating sheet and the battery cell for the battery module.
- the planar heating element; An insulating layer on one surface of the planar heating element; And an insulating adhesive layer on the other surface of the planar heating element, and a heat generation area of the planar heating element is about 40% to about 90% of the entire area of the battery cell to which the planar heating element is attached.
- the area of the heat generating portion of the planar heating element may include an area in which the temperature is increased by about 30 ° C. to about 50 ° C. compared to the initial temperature of the planar heating element.
- the planar heating element may generate heat only by the heat generating area of the planar heating element.
- Exothermic temperature of the planar heating element may be from about 20 °C to about 80 °C.
- the planar heating element may include a base film, a heating layer, and an electrode layer.
- the heating layer may include one or more selected from the group consisting of carbon nanotubes, carbon black, graphene, graphite, and combinations thereof.
- the heat generating layer may have a thickness of about 2 ⁇ m to about 10 ⁇ m.
- the insulating adhesive layer may have a thickness of about 25 ⁇ m to about 75 ⁇ m.
- the insulating layer may have a thickness of about 50 ⁇ m to about 100 ⁇ m.
- a battery module including the heat generating sheet and the battery cell for the battery module, wherein the heat generating portion of the battery cell is about 40% to about 90% of the entire area of the battery cell.
- the area of the heat generating portion of the battery cell may include an area in which the temperature rises from about 30 ° C. to about 50 ° C. relative to the initial temperature of the battery cell.
- the heating sheet for the battery module may increase the internal electrolyte temperature of the battery cell by about 20 ° C. or more within 200 seconds of starting to generate heat.
- the surface temperature of the battery cell may be about 20 ° C to about 80 ° C.
- the internal electrolyte temperature of the battery cell may be about ⁇ 10 ° C. to about 35 ° C.
- the heating sheet for the battery module can effectively increase the temperature of the winter battery cell in a short time, thereby extending the life of the battery.
- FIG. 1 is a schematic view showing a heating sheet for a battery module which is an embodiment of the present invention.
- FIG. 2 is a schematic view showing a heating sheet for a battery module including a planar heating element which is another embodiment of the present invention.
- FIG 3 is a schematic view showing a battery module according to another embodiment of the present invention.
- FIG. 4 is a graph showing a correlation between time vs. heat generating area vs. surface temperature.
- 5 to 7 are the heating element area of the planar heating element and the heat generating part area of the battery cell is 40%, 70%, 90%, according to the surface heating element heating temperature of 20 °C, 40 °C, 60 °C, 80 °C It is a graph showing the temperature of the electrolyte inside the battery cell rising within 200 seconds.
- the planar heating element; An insulating layer on one surface of the planar heating element; And an insulating adhesive layer on the other surface of the planar heating element, and a heat generation area of the planar heating element is about 40% to about 90% of the entire area of the battery cell to which the planar heating element is attached.
- lithium-ion batteries with high energy directivity are growing.
- lithium-ion batteries have poor low-temperature output characteristics, so when the temperature in winter decreases, the voltage drop increases, which may cause the electric vehicle to stop operating.
- a heating device to the cooling water for cooling or by adding a PTC heater used in diesel vehicles, the medium is first heated by the heating device. Since the battery was heated once, the efficiency of heat transfer could be reduced.
- the planar heating element provides a heating sheet capable of improving heat transfer efficiency by heating the heating element directly rather than indirectly by heating the medium. Specifically, by directly attaching the heating sheet to the surface of the battery cell can be aimed to raise the winter output of the battery by a predetermined level or more by a direct heating method.
- FIG. 1 is a schematic view showing a heating sheet for a battery module, which is an embodiment of the present invention, and may include an insulating layer 30, a planar heating element 20, and an insulating adhesive layer 10 from above.
- An area of the heat generating portion of the planar heating element may be about 40% to about 90% of the entire area of the battery cell to which the planar heating element is attached.
- the heat generating area refers to an area where heat is generated in the planar heating element by the heat generating layer of the planar heating element when an applied voltage is applied to the electrode layer of the planar heating element, and the heat generating area is the entire area of the battery cell to which the planar heating element is attached. It can be local to, for example, to generate heat for about 40% to about 90% of the battery cell front surface to which the planar heating element is attached.
- the electrolyte temperature inside the battery to which the planar heating element is attached does not heat up more than -10 ° C within about 200 seconds to secure the output of the battery. Can not.
- the temperature difference between the heating part and the non-heating part of the electrolyte inside the battery may occur, which may shorten the life of the battery.
- the electrolyte temperature inside the battery may be heated in a shorter time, but after about 200 seconds, the temperature is 35 ° C. or more.
- the battery may be damaged, and consumable power may be formed by unnecessarily heating all of the battery peripheral parts.
- the heat generating area of the planar heating element maintains about 40% to about 90%, specifically about 50% to about 80% of the entire area of the battery cell to which the planar heating element is attached, thereby producing an output of 85% or more within 200 seconds. It is possible to efficiently improve the electrolyte temperature inside the battery.
- the area of the heat generating portion of the planar heating element may include an area in which the temperature is increased by about 30 ° C. to about 50 ° C. compared to the initial temperature of the planar heating element.
- the rising temperature which forms the heating element area of the planar heating element is the temperature of the planar heating element attached to the surface of the battery when the global average temperature is about -30 ° C to about -10 ° C in winter, and the center temperature of the heating element area.
- the difference between and the edge temperature may be about 5 ° C to about 10 ° C.
- the area of the heat generating portion of the planar heating element means an area of about 30 ° C. to about 50 ° C. after the heat generation of the planar heating element rises from the initial temperature before the heat generation of the planar heating element when a constant voltage is applied to the electrode layer of the planar heating element. If the temperature of the planar heating element does not rise within the above range after heat generation, the mobility of the lithium ion may be reduced in the electrolyte of lithium ions, and thus the output of the electric current may not be constant, which may cause the start of the electric vehicle to be turned off, compared with the initial temperature of the planar heating element. As the temperature of the surface heating element rises within this time, it is possible to easily realize the effect of stable driving and increasing the life cycle of the battery.
- An area of the heat generating portion of the planar heating element may extend from the center of the front surface area of the battery cell to which the planar heating element is attached.
- the cross section of the horizontal plate-shaped heating element of the rectangular plate-shaped planar heating element refers to the center of the entire area of the battery cell to which the planar heating element is attached. It can be secured, and the heat generation area of the planar heating element can also be expanded as the heat generation from the central portion to the peripheral portion.
- An area of the heat generating portion of the planar heating element may be generated by applying a voltage of about 24 volts or less to the electrode layer of the planar heating element.
- the heat generating area refers to an area where heat is generated in the planar heating element by the heat generating layer of the planar heating element, and the voltage applied to the electrode layer of the planar heating element is About 24 volts or less.
- the target heat generating area may be maintained within a faster time, but may cause damage to the heat generating sheet including the planar heating element and the battery to which the same is applied.
- the planar heating element may generate heat only by the heat generating area of the planar heating element. For example, by applying a voltage of about 24 volts or less to the electrode layer of the planar heating element, the area of the heat generating portion of the planar heating element may be about 40% to about 90% of the entire area of the battery cell to which the planar heating element is attached. Only the heat generating area of the planar heating element can control the calorific value of the entire planar heating element.
- the calorific value refers to the amount of heat generated when current flows through the wire, and means the amount of heat generated in the planar heating element generated when the current flows for an applied voltage of 24 volts or less.
- the calorific value of the planar heating element when a voltage of 24 volts or less is applied to the electrode layer of the planar heating element, the calorific value of the planar heating element may be about 37.5W to about 150W.
- the driving efficiency of the battery can be realized at 100% within a short time and about 2 minutes.
- the driving efficiency of the electric vehicle battery in which the discharge occurs when the vehicle is driven and the charge occurs when the vehicle is controlled by the heat generation amount of the planar heating element may be increased by 100%.
- the heat generating temperature of the planar heating element is about 20 °C To about 80 ° C, specifically about 40 ° C to about 60 ° C.
- the exothermic temperature of the planar heating element means a temperature for heating the battery cell to be attached to the insulating adhesive layer, and directly affects the surface temperature of the battery cell adhered by the exothermic temperature of the planar heating element and the electrolyte temperature inside the battery cell. According to the heat generating area of the planar heating element, the heating temperature, that is, the heating temperature of the battery cell may be appropriately adjusted.
- the surface temperature of the planar heating element By ensuring the surface temperature of the planar heating element from about 20 °C to about 80 °C it can be implemented to the charge and discharge efficiency of the battery to 100%. More specifically, in order to operate the battery of the electric vehicle in winter, the output of the battery should be about 85% or more, and for this purpose, the electrolyte temperature inside the battery should be about -10 ° C to about 35 ° C. By ensuring the surface temperature of about 20 °C to about 80 °C can implement the battery of the winter electric vehicle.
- FIG. 2 is a diagram showing a heat generating sheet for a battery module including a planar heating element which is another embodiment of the present invention, wherein the planar heating element 20 has a base film 21, a heating layer 22, and an electrode layer 23 in this order. It may have a stacked structure.
- the base film 21 is biaxiallyoriented polyethylene terephthalate (BOPET), PI (polyimide), OPS (Oriented Polystyrene), OPP (oriented polypropylene), PEI (polyethyleneimine), PPS (Polyphenylene sulfide), It may include one or more selected from the group consisting of polyethylene naphthalate (PEN), poly (ether sulfones) (PES), and combinations thereof, and has insulation.
- BOPET biaxiallyoriented polyethylene terephthalate
- PI polyimide
- OPS Oriented Polystyrene
- OPP oriented polypropylene
- PEI polyethyleneimine
- PPS Polyphenylene sulfide
- the base film 21 may have a thickness of about 10 ⁇ m to about 100 ⁇ m. By maintaining the thickness of the base film in the above range, the flatness of the film layer can be maintained due to lack of thermal stability in the drying process after printing the heating layer to be laminated thereon, and the efficiency of transferring the heat of the heating layer to the heat transfer layer. Can be secured.
- the heat generating layer 22 includes one or more selected from the group consisting of carbon nanotubes (CNT), carbon black, graphene, graphite, and combinations thereof, and may be used by mixing two or more thereof.
- CNT carbon nanotubes
- a heat generating layer woven from carbon fiber, a heat generating layer impregnated with CNT or graphene on the nonwoven fabric, a heat generating layer impregnated with conductive carbon on the nonwoven fabric, and a heat generated by coating CNT or graphene paste or ink on the base film Layers can be used. Gravure method may be used for the coating.
- the heating layer 22 may have a thickness of about 2 ⁇ m to about 10 ⁇ m.
- the thickness of the heat generating layer can be maintained uniformly, and the operation as the heat generating element can be facilitated due to the low resistance value when voltage is applied to the electrode layer.
- the heat generating layer within the thickness range may be easy to mass production in a thickness that can be implemented only by printing by a rotary screen without cracking by improving adhesion to the substrate.
- the electrode layer 23 may adjust the resistance of the final product by adjusting the distance between the electrodes.
- the distance between the electrodes may be about 4mm to about 16mm, and by maintaining the distance between the electrodes in the above range, it becomes like a wire heater to avoid the case of being a line heating element rather than a heating element, the battery cell
- the increased localized heat supply to the surface can reduce the likelihood of explosion of the battery cells.
- by increasing the temperature of the battery cell surface uniformly it is possible to reduce the risk of explosion of the battery cell.
- the electrode layer 23 may be formed by patterning the heating layer 22 using screen printing. Ag, Cu, or the like can be used as a material of the electrode layer 23.
- the insulating layer 30 is a layer formed on one surface of the planar heating element 20 and may be formed in a thin film form.
- the insulating layer may include an insulator which prevents heat generated from the planar heating element from escaping to the outside, and does not pass through electricity or heat.
- the insulating layer 30 is biaxially oriented polyethylene terephthalate (BOPET), stretched polystyrene (OPS), stretched polypropylene (OPP), polyether teretone (PEEK), polyethylene terephthalate glycol (PETG), polyethylene imide ( PEI) may include any one selected from the film.
- the thickness of the insulating layer may be about 50 ⁇ m to about 100 ⁇ m.
- the insulating adhesive layer 10 is a layer formed on the other surface of the planar heating element 20 in which the insulating layer 30 is not formed, and maintains adhesive force with a battery to be attached later, and is generated in the planar heating element 20. Serves to transfer heat to the battery.
- the insulating adhesive layer 10 may be manufactured using an acryl-based, silicon-based, or EVA (EthyleneVinyl Acetate) -based compound.
- the acryl-based compound may be an acryl-based compound, an acryl-based polymer, an acryl-based copolymer, and the like, and may be, for example, (meth) acrylate, bisacrylate, and the like, a polymer, a copolymer thereof, and the like, but is not limited thereto. Any acrylic compound having tackiness can be used without limitation.
- the silicone compound may be a poly dimethyl siloxane compound, but is not limited thereto. Any silicone compound may be used without limitation as long as it is a silicone compound having insulation and adhesion. EVA-based compound is also not particularly limited, it will be apparent to those skilled in the art that any EVA-based compound having insulating and adhesive properties can be used without limitation.
- the insulating adhesive layer 10 may have a thickness of about 25 ⁇ m to about 75 ⁇ m.
- the adhesive strength may be about 1 Kgf / cm 2 or more, so that it is easy to maintain the adhesive force of a predetermined level or more, and exhibits the effect of moisture permeability through the side of the insulating adhesive layer.
- the thickness range of the insulating adhesive layer 10 since the heat generated in the heat generating layer 22 of the planar heating element 20 is transmitted late, a short time to the surface of the battery cell to be attached to the insulating adhesive layer later Can't rise inside.
- a planar heating element In another embodiment of the present invention, a planar heating element; An insulating layer on one surface of the planar heating element; And an insulating adhesive layer on the other surface of the planar heating element, wherein a heat generating area of the planar heating element is 40% to 90% of the entire area of the battery cell to which the planar heating element is attached;
- the battery module provides a battery module in which an area to be heated of the battery cell is 40% to 90% of the entire area of the battery cell.
- the battery cell is a known battery cell, and can be applied without limitation of structure.
- the battery cell may be a solar cell battery or an automotive battery cell, and more specifically, may be an electric vehicle battery cell.
- the heat generating area of the planar heating element included in the heating sheet may be about 40% to about 90% of the entire area of the battery cell to which the planar heating element is attached.
- the heating elements that are directly contacted and affected by the heating of the planar heating element may be a battery cell, wherein the area of the heating portion of the battery cell is also about 40% to about 90% of the entire surface of the battery cell. Can be%.
- the area of the heat generating portion of the battery cell may include an area in which the temperature rises from about 30 ° C. to about 50 ° C. relative to the initial temperature of the battery cell.
- the area of the heat generating part of the battery cell may be generated by the area of the heat generating part of the planar heating element, and the area of the heat generating part temperature of the battery cell is increased by about 30 ° C. to about 50 ° C. compared to the initial temperature before the heat generation of the battery cell. Means. After the heating of the planar heating element, the generated heat temperature of the battery cell rises within the above range, thereby realizing the charging and discharging efficiency of the battery at 100%.
- the heating sheet for the battery module may increase the internal electrolyte temperature of the battery cell by about 20 ° C. or more within about 200 seconds from the start of heat generation by the heating temperature of the planar heating element, that is, the heating temperature applied to the battery cell.
- the surface temperature of the battery cell may be increased by about 20 ° C within a shorter time after the start of heating.
- it is not necessary to form all of the peripheral parts of the battery unnecessarily to consume power.
- the surface temperature of the battery cell is increased to less than about 20 ° C., so that the output of the battery cannot be secured, and thus it may be difficult to drive the battery in the winter. have. Therefore, it is possible to provide a battery module with improved efficiency economically by having a heat generating portion area in the above range.
- the exothermic temperature of the planar heating element is about 20 ° C. to about 80 ° C.
- the surface temperature of the battery cell heated by being directly affected by the exothermic temperature of the planar heating element is about 20 ° C. to about 80 ° C.
- the internal electrolyte temperature of the battery cell may be about ⁇ 10 ° C. to about 35 ° C.
- the internal electrolyte temperature of the battery cell can be increased, and the battery output during winter can be more than 85% exhibited by the increased electrolyte temperature.
- the carbon nanotube paste was coated to a thickness of 5 ⁇ m on a BOPET substrate film having a thickness of 100 ⁇ m on both sides of the primer.
- the carbon nanotube-coated base films were printed on the Ag electrode layer at a time so that the carbon nanotube-coated base films were connected to each other to prepare a planar heating element.
- an aluminum thin film (foil) was laminated on one surface of the planar heating element, and an acrylic pressure-sensitive adhesive was applied on the other surface of the planar heating element to a thickness of 25 ⁇ m to prepare a heating sheet.
- the adhesive was attached to a battery cell to manufacture a battery module for an electric vehicle.
- the temperature of the internal electrolyte of the battery cell is improved to -10 ° C. or more within 100 seconds, 120 seconds, 150 seconds, 180 seconds, and 200 seconds after the start of heating.
- the heat generating area area that can ensure the heating temperature applied to the battery cell by the heat generating temperature of the planar heating element or the heat generating of the planar heating element to 40 °C.
- the heating temperature of the planar heating element included in the heating sheet that is, the heating temperature applied to the battery cell by the heating of the planar heating element is 40 ° C.
- the electrolyte temperature inside the battery cell starts heating 200 seconds.
- the area of the heat generating portion of the planar heating element and the area of the heat generating portion of the battery cell for the internal electrolyte temperature of the battery to be -10 ° C or more within 40% to 90%. More specifically, within 120 seconds, which is the limit time that a person can wait after starting, it is preferable that the area of the heat generating portion of the planar heating element and the area of the heat generating portion of the battery cell is about 70% to about 90%.
- 5 to 7 are the heating element area of the planar heating element and the heat generating part area of the battery cell is 40%, 70%, 90%, according to the surface heating element heating temperature of 20 °C, 40 °C, 60 °C, 80 °C It is a graph showing the temperature of the electrolyte inside the battery cell rising within 200 seconds of the heat generation.
- the area of the heat generating portion of the planar heating element and the area of the heat generating part of the battery cell is 40%, in order for the electrolyte temperature inside the battery cell to be -10 ° C. or more within 200 seconds, that is, the heat generating temperature of the planar heating element, that is, The temperature applied to the battery cell should be at least 40 °C.
- the area of the heat generating portion of the planar heating element and the area of the heat generating portion of the battery cell is 70%, in order for the electrolyte temperature inside the battery cell to be -10 ° C. or more within 200 seconds, that is, the heat generating temperature of the planar heating element, that is, This is possible when the temperature applied to the battery cell is 20 ° C or higher.
- the heating temperature of the planar heating element that is, the temperature applied to the battery cell is only 20 ° C. within 120 seconds shorter than 200 seconds. Even if it was maintained, the electrolyte temperature inside the battery cell was found to be -10 ° C or more.
- the temperature at which the electrolyte inside the battery cell rises within 200 seconds varies depending on the heat generating area of the planar heating element and the area of the heat generating part of the battery cell, and the planar heating element is considered in consideration of the rising temperature of the electrolyte. It was confirmed that the heating temperature of, that is, the temperature applied to the battery cell should be appropriately designed.
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Abstract
Description
Claims (14)
- 면상발열체;상기 면상발열체 일면에 절연층; 및상기 면상발열체의 다른 일면에 절연점착층을 포함하고,상기 면상발열체의 발열부 면적이 상기 면상발열체가 부착된 배터리 셀 전면적의 40% 내지 90%인배터리 모듈용 발열시트.
- 제 1항에 있어서,상기 면상발열체의 발열부 면적은 면상발열체의 최초온도에 비해 온도가 30℃ 내지 50℃ 상승한 면적을 포함하는배터리 모듈용 발열시트.
- 제 1항에 있어서,상기 면상발열체의 발열부 면적만으로 상기 면상발열체가 발열하는배터리 모듈용 발열시트.
- 제 1항에 있어서,상기 면상발열체의 발열온도가 20℃인 내지 80℃인배터리 모듈용 발열시트.
- 제 1항에 있어서,상기 면상 발열체는 기재필름, 발열층 및 전극층을 포함하는 것을 특징으로 하는배터리 모듈용 발열시트.
- 제 5항에 있어서,상기 발열층은 탄소나노튜브, 카본 블랙, 그래핀, 그래파이트 및 이들의 조합으로 이루어진 군으로부터 선택되는 하나 이상을 포함하는배터리 모듈용 발열시트.
- 제 5항에 있어서,상기 발열층의 두께는 2㎛ 내지 10㎛인배터리 모듈용 발열시트.
- 제 1항에 있어서,상기 절연 점착층의 두께는 25㎛ 내지 75㎛인배터리 모듈용 발열시트.
- 제 1항에 있어서,상기 절연층의 두께는 50㎛ 내지 100㎛인배터리 모듈용 발열시트.
- 제 1항 내지 9항 중 어느 하나에 기재된 배터리 모듈용 발열시트 및 배터리 셀을 포함하고,상기 배터리 셀의 피발열부 면적이 상기 베터리 셀 전면적의 40% 내지 90%인배터리 모듈.
- 제 10항에 있어서,상기 베터리 셀의 피발열부 면적은 베터리 셀의 최초온도에 비해 온도가 30℃ 내지 50℃ 상승한 면적을 포함하는배터리 모듈.
- 제 10항에 있어서,상기 배터리 모듈용 발열시트는 배터리 셀의 내부 전해질 온도를 발열 시작 200초 이내에 20℃이상 상승시키는배터리 모듈.
- 제 10항에 있어서,상기 배터리 셀의 표면온도는 20℃인 내지 80℃인배터리 모듈.
- 제 10항에 있어서,상기 배터리 셀의 내부 전해질 온도는 -10℃인 내지 35℃인배터리 모듈.
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US14/652,638 US9742046B2 (en) | 2012-12-21 | 2013-08-26 | Heating sheet for battery module and battery module including same |
JP2015549239A JP2016507861A (ja) | 2012-12-21 | 2013-08-26 | バッテリーモジュール用発熱シート及びこれを含むバッテリーモジュール |
EP13864336.6A EP2937931B1 (en) | 2012-12-21 | 2013-08-26 | Heating sheet for battery module and battery module including same |
CN201380067690.6A CN104871640B (zh) | 2012-12-21 | 2013-08-26 | 电池模块用发热片及包括其的电池模块 |
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KR101663855B1 (ko) | 2016-10-10 |
CN104871640A (zh) | 2015-08-26 |
US9742046B2 (en) | 2017-08-22 |
CN104871640B (zh) | 2017-03-15 |
EP2937931A4 (en) | 2015-11-11 |
KR20140083080A (ko) | 2014-07-04 |
JP2016507861A (ja) | 2016-03-10 |
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