WO2013157445A1 - Batterie secondaire non aqueuse - Google Patents

Batterie secondaire non aqueuse Download PDF

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Publication number
WO2013157445A1
WO2013157445A1 PCT/JP2013/060722 JP2013060722W WO2013157445A1 WO 2013157445 A1 WO2013157445 A1 WO 2013157445A1 JP 2013060722 W JP2013060722 W JP 2013060722W WO 2013157445 A1 WO2013157445 A1 WO 2013157445A1
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WO
WIPO (PCT)
Prior art keywords
metal terminal
battery
terminal
secondary battery
aqueous secondary
Prior art date
Application number
PCT/JP2013/060722
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English (en)
Japanese (ja)
Inventor
虎太　直人
里美 長谷川
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シャープ株式会社
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Publication of WO2013157445A1 publication Critical patent/WO2013157445A1/fr

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/106—PTC
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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 non-aqueous secondary batteries such as lithium ion secondary batteries.
  • Non-aqueous secondary batteries represented by lithium ion secondary batteries have high capacity and high energy density, and are excellent in storage performance and charge / discharge repetition characteristics etc. It's being used. Further, in recent years, lithium ion secondary batteries have come to be used for power storage applications and in-vehicle applications such as electric vehicles due to a growing awareness of environmental problems and energy saving.
  • non-aqueous secondary batteries due to their high energy density, may overheat abnormally in an overcharged state or in a state exposed to a high temperature environment. Therefore, in the non-aqueous secondary battery, various measures for safety are taken.
  • the electrode plate portion is accommodated inside the case body of the battery case having conductivity, and the positive electrode terminal is disposed on the lid of the battery case via the insulator. There is.
  • the electrode plate portion and the positive electrode terminal are connected by a positive electrode current collector.
  • the positive electrode current collector and the positive electrode terminal are formed of a metal material having a relatively low melting point (eg, indium).
  • the current collector for the positive electrode is melted first, so that energization from the positive electrode terminal to the electrode plate portion Will be cut off. Thereafter, the positive electrode terminal is melted, and a part of the melted positive electrode terminal passes over the insulator to be in a conductive state with the lid, so that the failed battery cell can be bypassed.
  • a positive electrode current collector is provided laterally in the upper position in the negative electrode can of the secondary battery, and a metal safety valve and a positive electrode lid are sequentially provided on the positive electrode current collector. ing.
  • a temperature fuse is provided between the peripheral end of the metal safety valve and the peripheral end of the positive electrode lid.
  • electrodes are arranged in parallel at upper and lower positions in a through hole formed in an insulating plate, and a contact point for conducting both electrodes is arranged between these two electrodes.
  • the contacts are formed in a substantially V-shape so that one end of two plates can be separated and bonded in a detachable manner, one of the V-shaped spread parts is connected to the upper electrode, and the other is the lower electrode. It is connected to the.
  • the V-shaped interior of the contact is filled with a thermally expandable insulator.
  • the thermal expansion insulator of the thermal fuse thermally expands to cut the contacts up and down, and the current path of the secondary battery is interrupted.
  • Japanese patent publication Japanese Patent Application Laid-Open No. 2008-153203 (July 3, 2008 published)" Japanese Patent Publication No. 10-275545 (October 13, 1998)
  • Patent Documents 1 and 2 are configured to have a single temperature fuse as a current cutoff mechanism for the secondary battery. For this reason, in the above-mentioned conventional current interrupting mechanism, when the temperature of the secondary battery having a large capacity of about 15 Ah or more, for example, rises abnormally, there is a possibility that the progress of the temperature rise can not be prevented reliably.
  • the present invention provides a non-aqueous secondary battery capable of reliably preventing the progress of temperature rise up to an abnormal temperature due to, for example, a rapid rise in temperature, even in the case of a large capacity secondary battery.
  • the purpose is.
  • the non-aqueous secondary battery of the present invention comprises a laminate having at least one layer in which a positive electrode plate and a negative electrode plate are laminated via a separator, and a plurality of the laminates. And a battery terminal of a positive electrode electrically connected to the positive electrode plate of each of the laminates, and a battery terminal of a negative electrode electrically connected to the negative electrode plate of each of the laminates.
  • a plurality of laminates each having at least one layer in which the positive electrode plate and the negative electrode plate are laminated via the separator are laminated, and the temperature rise preventing element is provided for each laminate.
  • FIG. 5A shows an example of the thermal fuse functional element shown in FIG. 4 and is a longitudinal sectional view showing the expanded state of the thermal fuse functional element
  • FIG. 5B shows FIG.
  • FIG. 6A is a plan view of the thermal fuse functional element in the expanded state shown in FIG.
  • FIG. 6 (a) is a longitudinal sectional view showing a thermal fuse functional element manufactured from the state of FIG. 5 (a), and FIG. 6 (b) is a thermal fuse function shown in FIG. 6 (a).
  • FIG. 19 is a plan view of the element 24. It is a longitudinal cross-sectional view which shows the structure of the thermal fuse functional element with which the non-aqueous secondary battery in other embodiment of this invention is equipped. It is a longitudinal cross-sectional view which shows the state in which the thermal fuse function element shown in FIG. 7 operate
  • FIG. 1 is a schematic longitudinal sectional view showing a non-aqueous secondary battery in the embodiment of the present invention.
  • FIG. 2 is a schematic exploded perspective view of the non-aqueous secondary battery shown in FIG.
  • the non-aqueous secondary battery 1 of this Embodiment is a lamination
  • the non-aqueous secondary battery 1 is not limited to a lithium two-ion secondary battery, and may be another secondary battery.
  • the electrode group 12 is a stack of a plurality of laminates 18.
  • Fixing members 25 are disposed on both sides of the electrode group 12. As described later, a thermal fuse function element (temperature rise preventing element) 24 is provided inside the fixing member 25.
  • the non-aqueous secondary battery 1 is a large secondary battery having a square flat shape.
  • the non-aqueous secondary battery 1 has a configuration in which an electrode group 12 is housed inside a metal battery can (battery container) 11 and filled with a non-aqueous electrolytic solution.
  • the battery can 11 is formed, for example, by pressing a metal plate, and has a container-like case 13 and a lid member 14.
  • the material of the battery can 11 is iron, nickel-plated iron, stainless steel or aluminum.
  • the container-like case 13 has a substantially rectangular parallelepiped container shape with an open upper surface, and the lid member 14 covers the upper surface of the container-like case 13.
  • the container-like case 13 has a collar 15 at the periphery of the upper end, and the battery can 11 is formed by, for example, laser welding the collar 15 of the container-like case 13 and the lid member 14.
  • the battery terminal 16 is provided in the both-sides wall side by the side of the longitudinal direction in the container-like case 13 of the battery can 11, respectively.
  • the battery terminals 16 penetrate the side wall of the case 13 in a state of being insulated from the case 13.
  • One of the two battery terminals 16 is a positive battery terminal 16 and the other is a negative battery terminal 16.
  • the ends of the battery terminals 16 on the inner side of the case 13 are connected to the current collecting terminals 17 respectively.
  • the current collection terminal 17 connected to the battery terminal 16 of the positive electrode is electrically connected to the current collection tab of each positive electrode plate 21 in the electrode group 12 (laminated body 18) via the thermal fuse functional element 24 inside the fixing member 25.
  • the current collection terminal 17 connected to the battery terminal 16 of the negative electrode is electrically connected to the current collection tab of each negative electrode plate 22 in the electrode group 12 (laminated body 18) via the thermal fuse function element 24 inside the fixing member 25.
  • the electrode group 12 accommodated in the battery can 11 has a configuration in which a plurality of laminated bodies 18 shown in FIG. 3 are laminated.
  • FIG. 3 is a longitudinal sectional view showing an example of the laminate 18 constituting the electrode group 12 shown in FIG.
  • the laminate 18 has a configuration in which the positive electrode plate 21 and the negative electrode plate 22 are alternately stacked in a plurality of layers with the separator 23 interposed therebetween.
  • the positive electrode plate 21 has a positive electrode active material layer 21 a formed on both sides of a positive electrode current collector 21 b made of, for example, aluminum foil.
  • the negative electrode plate 22 is, for example, one in which a negative electrode active material layer 22 a is formed on both sides of a negative electrode current collector 22 b made of copper foil.
  • the separator 23 insulates the positive electrode plate 21 and the negative electrode plate 22.
  • the separator 23 is disposed on the uppermost electrode (negative electrode plate 22) in the laminated body 18 and further below the lowermost electrode (negative electrode plate 22) in the lowermost laminated body 18. Note that the stacked body 18 in a stacked state may be wrapped by the separator 23.
  • the laminate 18 includes 10 positive electrode plates 21, 11 negative electrode plates 22 and 21 separators 23, and the electrode group 12 is formed by laminating the laminate 18 into seven layers. There is.
  • an organic electrolytic solution as the electrolytic solution filled in the battery can 11.
  • an organic solvent of the organic electrolytic solution esters such as ethylene carbonate, propylene carbonate, butylene carbonate, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate, ⁇ -butyrolactone, etc., tetrahydrofuran, 2-methyltetrahydrofuran, dioxane, dioxolane Ethers such as diethyl ether, dimethoxyethane, diethoxyethane, methoxyethoxyethane and the like, and further, dimethylsulfoxide, sulfolane, methylsulfolane, acetonitrile, methyl formate, methyl acetate and the like can be used. These organic solvents may be used alone or in combination of two or more.
  • FIG. 4 is a longitudinal sectional view showing the configuration of the non-aqueous secondary battery 1 shown in FIG. 1 in detail.
  • thermo fuse function elements 24 are arranged in the vertical direction corresponding to the number of the stacked bodies 18. These thermal fuse functional elements 24 are covered with a fixing member 25 made of an insulating material such as resin.
  • the fixing member 25 preferably has a two-layer structure including a first layer surrounding the fixing member 25 and a second layer surrounding the first layer.
  • the first layer may be a rubber-like layer having a viscosity lower than that of the second layer, or a slime-like layer. In such a configuration, an air gap is unlikely to occur around the thermal fuse functional element 24.
  • the thermal fuse functional element 24 has, for example, a battery can 11 having a dimension in the width direction (direction perpendicular to the sheet of FIG. 4) shorter than that in the longitudinal direction (direction parallel to the sheet of FIG. It may be arranged at the central part in the width direction of. Accordingly, as shown in FIG. 2, the fixing member 25 is formed so that the dimension in the width direction (direction perpendicular to the sheet of FIG. 4) is slightly larger than the dimension in the width direction of the thermal fuse functional element 24. It may be done. Alternatively, the fixing member 25 may be formed to have the same dimension in the width direction as the dimension in the width direction of the laminated body 18 regardless of the dimension in the width direction of the thermal fuse functional element 24.
  • the thermal fuse functional element 24 includes a first metal terminal 32 and a second metal terminal 31 made of conductive metal foil, and further, a resin layer 33. Is equipped.
  • the first metal terminal 32 and the second metal terminal 31 are disposed such that the tip end portions overlap each other at a predetermined distance in the vertical direction, and the resin layer 33 is formed in the second tip portion of the second metal terminal 31.
  • a region where the metal terminal 31 overlaps with the front end portion of the first metal terminal 32 and a region at the rear end side of the second metal terminal 31 than the region are provided. Therefore, the resin layer 33 exists between the second metal terminal 31 and the first metal terminal 32.
  • the second metal terminal 31 has the lower surface on the rear end side in the state of (a) of FIG. 5 and (b) of FIG.
  • the resin layer 33 is bent so as to be in contact with the upper surface of the tip of the first metal terminal 32.
  • the first metal terminal 32 and the second metal terminal 31 become conductive.
  • the contact part of the 1st metal terminal 32 and the 2nd metal terminal 31 is connected by ultrasonic welding, for example.
  • the resin layer 33 is melted when it receives heat when the laminate 18 is abnormally heated, for example, by abnormal heat generation due to overcharging of the non-aqueous secondary battery 1 or the like.
  • the resin layer 33 has a melting point of 60 ° C. to 150 ° C.
  • a material of such a resin layer 33 it is preferable to use, for example, a polyolefin resin.
  • the resin layer 33 melts. Further, the second metal terminal 31 is disconnected from the first metal terminal 32 due to the deformation of the second metal terminal 31 itself or the expansion of the resin layer 33 due to heat. In this case, the melted resin layer 33 spreads between the first metal terminal 32 and the second metal terminal 31, and the conduction between the first metal terminal 32 and the second metal terminal 31 is interrupted. As a result, the current path of the stack 18 in the overheated state is cut off.
  • energization between the battery terminal 16 of the positive electrode and the battery terminal 16 of the negative electrode through one laminate 18 in the non-aqueous secondary battery 1 is performed by using the battery terminal 16 of the positive electrode, the thermal fuse functional element 24, It is carried out along the path of the positive electrode plate 21 of the laminate 18, the negative electrode plate 22 of the laminate 18, the thermal fuse functional element 24 and the battery terminal 16 of the negative electrode.
  • the heat is transmitted to the thermal fuse functional element 24 corresponding to the stacked body 18.
  • the thermal fuse functional element 24 when the temperature rises and reaches high temperature, the first metal terminal 32 and the second metal terminal 31 are disconnected. This broken state is stably maintained by the presence of the melted resin layer 33 between the first metal terminal 32 and the second metal terminal 31. As a result, the current flow to the overheated stack 18 is reliably blocked.
  • the above short circuit is caused by, for example, the separator 23 and the positive electrode plate 21 relatively moving in the horizontal direction due to vibration and the positive electrode plate 21 and the negative electrode plate 22 coming into contact with each other.
  • the space area (dead space) in the battery can 11 is reduced, and the injection amount of the non-aqueous electrolytic solution into the battery can 11 is reduced. it can.
  • the decrease in the injection amount of the non-aqueous electrolyte solution leads to shortening of the time required for the non-aqueous electrolyte injection step in the manufacturing process of the non-aqueous secondary battery 1.
  • the fixing member 25 has a width direction (see FIG. It is preferable that the dimension in the direction perpendicular thereto be formed to the same extent as the dimension in the width direction of the laminate 18.
  • an insulating foam for example, a foam of polyethylene may be disposed in the above-mentioned space area. This polyethylene foam is excellent in mechanical strength and chemical resistance, and further excellent in heat resistance, and therefore, is suitable as a member disposed in the above-mentioned space area of the battery can 11.
  • the non-aqueous secondary battery 1 of the present embodiment includes the plurality of stacked bodies 18 and the thermal fuse functional element 24 can be easily disposed corresponding to each stacked body 18, so that And capacity can be easily coped with. Further, it is possible to reliably prevent the progress of the overheat state in response to the increase in size and the increase in capacity.
  • the non-aqueous secondary battery 1 according to the embodiment of the present invention includes a thermal fuse functional element 41 shown in FIG. 7 in place of the thermal fuse functional element 24 shown in FIG.
  • FIG. 7 is a longitudinal sectional view showing the configuration of the thermal fuse functional element 41 provided in the non-aqueous secondary battery 1 of the present embodiment.
  • the other configuration is the same as the configuration of the embodiment described above.
  • the thermal fuse functional element 41 includes a first metal terminal 42 and a second metal terminal 43 formed of a conductive metal plate, and further includes a resin layer 44 for connection.
  • the end portions on the opposite side of the first metal terminal 42 and the second metal terminal 43 will be referred to as respective tip portions.
  • the first metal terminal 42 and the second metal terminal 43 have a flat plate shape, and the second metal terminal 43 is disposed above the second metal terminal 43.
  • the first metal terminal 42 and the second metal terminal 43 are disposed such that the portions on the tip end side overlap in the vertical direction, and the connecting resin layer 44 is disposed between the portions on the tip end portion There is.
  • a plurality of, for example, five connection resin layers 44 are arranged.
  • the connecting resin layer 44 has conductivity imparted to the outer peripheral surface by forming the conductive layer 44 b by plating the conductive metal on the outer peripheral surface of the inner resin layer 44 a, for example, gold plating, electroless plating, evaporation or the like. It is a thing. Therefore, the first metal terminal 42 and the second metal terminal 43 are electrically connected via the conductive layer 44 b of the connection resin layer 44.
  • the internal resin layer 44a of the connection resin layer 44 transfers heat through the current path when the laminate 18 abnormally heats, for example, due to overcharging of the non-aqueous secondary battery 1, as in the resin layer 33 described above. It melts when done.
  • the resin layer 33 has a melting point of 60 ° C. to 150 ° C.
  • a polyolefin resin can be used as a material of such a resin layer 33.
  • the connecting resin layer 44 shown in FIG. 7 has a circular cross section, and is cylindrical or spherical.
  • the shape of the connection resin layer 44 is not particularly limited, and may be, for example, a prismatic prism having a rectangular cross section or a prism having an elliptical cross section.
  • the thermal fuse functional element 41 By the above-described operation of the thermal fuse functional element 41, the first metal terminal 42 and the second metal terminal 43 are disconnected, and the current path of the laminate 18 in the overheated state is interrupted. In addition, since an insulating layer of the melted internal resin layer 44a is formed between the first metal terminal 43 and the first metal terminal 42, the broken state between the first metal terminal 42 and the second metal terminal 43 is stable. Maintained. As a result, energization to the overheated stack 18 is reliably prevented.
  • the other functions of the non-aqueous secondary battery 1 in the present embodiment and the configuration for enhancing the functions are the same as those in the above-described embodiment.
  • the thermal fuse functional element 24 (fixing member 25) is disposed on both sides of the electrode group 12 (laminated body 18) in the current path of the non-aqueous secondary battery 1, as shown in FIG.
  • the configuration is However, without being limited thereto, the thermal fuse functional element 24 is disposed only on one side of the electrode group 12 (laminated body 18) in the current path of the non-aqueous secondary battery 1, as shown in FIG. It is good also as composition.
  • FIG. 9 is a longitudinal sectional view of the non-aqueous secondary battery 1 showing an example in which the thermal fuse functional elements 24 are arranged in an arrangement form different from the arrangement form shown in FIG.
  • the thermal fuse functional element 24 can exhibit the same current interrupting function in the non-aqueous secondary battery 1 even in the arrangement form as shown in FIG. 9.
  • the thermal fuse functional elements 24 are arranged at predetermined intervals in the vertical direction.
  • the thermal fuse functional elements 24 may be arranged adjacent to each other without providing a predetermined distance in the vertical direction.
  • thermal fuse functional element 24 is disposed as one mass, when heat from the stack 18 in the overheated state is transferred to the thermal fuse functional element 24, the thermal fuse functional by the heat The element 24 becomes easy to function. Therefore, this is preferable in enhancing the responsiveness of the thermal fuse functional element 24.
  • the PTC thermistor device has a resistance value that rapidly increases when the temperature inside the device rises due to an overcurrent or a rise in ambient temperature. Thereby, the PTC thermistor element minutely restricts the flowing current when the non-aqueous secondary battery 1 abnormally rises, and substantially cuts off the current path in the non-aqueous secondary battery 1. , And the same function as the thermal fuse functional element 24.
  • the PTC thermistor element can be similarly disposed inside the fixing member 25 in place of the thermal fuse functional element 24. When a PTC thermistor element is used, although it depends on the specification of the used element, the safety of the battery can be further enhanced by designing in consideration of the specification of the current flowing in each laminate inside the battery.
  • Li-FePO 4 (90 parts by weight) as a positive electrode active material, acetylene black (5 parts by weight) as a conductive material, and polyvinylidene fluoride (5 parts by weight) as a binder are mixed, and N-methyl as a solvent -2-Pyrrolidone is added as appropriate to prepare a slurry, which is uniformly coated on both sides of an aluminum foil (thickness 20 ⁇ m) as a positive electrode current collector and dried, and then compressed by a roll press. It cut
  • the container-like case 13 and the lid member 14 constituting the battery can 11 were respectively made of a 0.8 mm thick iron plate plated with nickel as a material.
  • the longitudinal direction x lateral direction x depth of the container-like case 13 was 320 mm x 150 mm x 40 mm in internal size.
  • the lid member 14 has a plate-like configuration to be fitted into the inside of the battery can 11 in order to be in close contact with the upper surface of the electrode group 12.
  • the plate-like lid member 14 is used, movement at the time of welding the lid member 14 to the container-like case 13 can be prevented, and the welding operation becomes easy.
  • the positive electrode plate 21 and the negative electrode plate 22 are alternately stacked via the separator 23. At that time, 11 positive plate 21, 12 negative plates 22, and 22 separators 23 were laminated such that the negative plate 22 was positioned on the outside of the positive plate 21.
  • the laminated body 18 which consists of this structure was made into one laminated body.
  • An electrode group 12 (seven laminates) was formed by winding the laminate 18 using a polyolefin-based porous film having a thickness of 25 ⁇ m, which is the same as that of the separator 23.
  • the size of the separator 23 interposed between the positive and negative electrode plates is 145 mm ⁇ 255 mm, and is slightly larger than the positive electrode plate 21 (140 mm ⁇ 250 mm) and the negative electrode plate 22 (142 mm ⁇ 255 mm). is there. Thereby, the active material layer formed on the positive electrode plate 21 and the negative electrode plate 22 can be reliably covered.
  • the current collection terminal 17 is connected to the current collector exposed portion of the positive electrode and the current collector exposed portion of the negative electrode, and the temperature fuse functional element 24 (or 41) is provided between the current collector terminal 17 and the battery terminal 16 Connected. Further, the thermal fuse functional element 24 (or 41) was fixed by a fixing member 25 obtained by processing a polyethylene resin made of an insulating material.
  • a foam of polyethylene which is a foam having an insulating property, was disposed.
  • the foam is cut into a predetermined size and assembled in the container-like case 13, the electrode group 12 is accommodated in the container-like case 13, the current collecting terminal and the battery terminal 16 are connected, and the lid member 14 is attached to the container-like case 13. Attached and fixed. Thereafter, the non-aqueous electrolyte was injected under reduced pressure from the injection hole, and after the injection, the injection hole was sealed.
  • non-aqueous secondary batteries of Examples 1 and 2 provided with the thermal fuse functional elements 24 and 41, respectively were prepared.
  • a non-aqueous secondary battery having the same configuration as the first embodiment (the configuration including the fixing member 25) except for the thermal fuse functional elements 24 and 41 is prepared.
  • a non-aqueous secondary battery having the same configuration as that of Example 1 except that the thermal fuse function elements 24 and 41 and the fixing member 25 were not provided was prepared. Then, in order to evaluate each of these examples, an overcharge test and a vibration test were performed.
  • the overcharge test was evaluated at a charge current of 0.5 C and a termination voltage of 12 V. The results are shown in Table 1.
  • the vibration test was conducted for 3 hours and 45 minutes (11 hours and 15 minutes in total) in three axial directions (x-axis, y-axis and z-axis).
  • the fluctuation range of the frequency is 5 Hz to 200 Hz to 5 Hz
  • the fluctuation range of the acceleration is 1 G to 8 G to 1 G.
  • one set was 15 minutes
  • 15 sets (3 hours 45 minutes) were performed in each axial direction. The results are shown in Table 2.
  • the fixing member 25 effectively suppress the lateral displacement of the electrode group 12.
  • the thermal fuse function elements 24 and 41 are provided, and a fixing member for fixing the stacked electrode group 12 at a predetermined position in the battery can 11
  • the provision of the No. 25 can reliably prevent the progress of the overheat state when the overheat state occurs, and the reliability can be improved. It can be enhanced.
  • the non-aqueous secondary battery of the present invention comprises a laminate having at least one layer in which a positive electrode plate and a negative electrode plate are laminated via a separator, and an electrode group formed by laminating a plurality of the laminates, A battery terminal of a positive electrode electrically connected to the positive electrode plate of each of the laminates, and a battery terminal of a negative electrode electrically connected to the negative electrode plate of each of the laminates;
  • the stacked layers disposed in at least one of a current path between each of the stacked bodies and the battery terminal of the positive electrode and a current path between each of the stacked bodies and the battery terminal of the negative electrode in an overheated state
  • a temperature rising preventing element for blocking the current path by heat transferred from the body, a battery terminal of the positive electrode and a battery terminal of the negative electrode are provided, and the electrode group, the temperature rising preventing element and the non-aqueous electrolyte are accommodated.
  • a battery container A A.
  • a plurality of laminates each having at least one layer in which a positive electrode plate and a negative electrode plate are laminated via a separator are laminated, and the temperature rise preventing element is Since the configuration is provided, it is possible to reliably prevent the progress of the temperature rise in the overheat state by operating the plurality of temperature rise preventing elements in response to the increase in size and the increase in capacity easily. Can.
  • the temperature rise prevention element may be covered by an insulating fixing member.
  • the temperature rise prevention element since the temperature rise prevention element is covered with the insulating fixing member, the heat transmitted from the overheated laminate to the temperature rise prevention element is hardly radiated. Therefore, the temperature rise prevention element can quickly interrupt the current path when the stack is overheated.
  • the battery terminal of the positive electrode is provided on the side walls facing each other of the battery container, the battery terminal of the negative electrode is provided on the other side wall, and the temperature rise prevention element is
  • the fixing member may be arranged at a position between the electrode group and the battery terminal of the positive electrode and a position between the electrode group and the battery terminal of the negative electrode, and the fixing member may be fixed in the battery case.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne une batterie secondaire non aqueuse qui comporte : un corps empilé (18), formé par les couches suivantes : une plaque d'électrode positive, un séparateur et une plaque d'électrode négative ; un groupe d'électrodes (12) dans lequel une pluralité de couches du corps empilé (18) sont empilées ; des éléments de prévention d'augmentation de température (24) disposés sur au moins un des trajets de courant entre la plaque d'électrode positive de chaque couche du corps empilé (18) et la borne de batterie (16) de l'électrode positive et entre la plaque d'électrode négative de chaque couche du corps empilé (18) et la borne de batterie (16) de l'électrode négative, et la coupure des trajets de courant par la chaleur provenant d'une couche du corps empilé (18) dans un état surchauffé ; un boîtier de batterie (11).
PCT/JP2013/060722 2012-04-16 2013-04-09 Batterie secondaire non aqueuse WO2013157445A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-093258 2012-04-16
JP2012093258A JP2013222594A (ja) 2012-04-16 2012-04-16 非水系二次電池

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WO2013157445A1 true WO2013157445A1 (fr) 2013-10-24

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