WO2025037464A1 - 電池パック - Google Patents

電池パック Download PDF

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Publication number
WO2025037464A1
WO2025037464A1 PCT/JP2024/018768 JP2024018768W WO2025037464A1 WO 2025037464 A1 WO2025037464 A1 WO 2025037464A1 JP 2024018768 W JP2024018768 W JP 2024018768W WO 2025037464 A1 WO2025037464 A1 WO 2025037464A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
hole
laminate
resin layer
heat absorbing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/018768
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
雄太 二階堂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP2025540607A priority Critical patent/JPWO2025037464A1/ja
Publication of WO2025037464A1 publication Critical patent/WO2025037464A1/ja
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical cells
    • 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
    • H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
    • 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
    • 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
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
    • 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

  • This technology relates to battery packs.
  • Patent Document 1 discloses a method in which a heat absorbing member is brought into contact with the battery in a battery unit, and the battery that generates abnormal heat is cooled by the heat absorbing member.
  • the battery pack according to the first aspect of the present technology includes a battery, a heat absorbing agent, and a heat absorbing member having a container that contains the heat absorbing agent.
  • the heat absorbing member is disposed in a position adjacent to the battery.
  • the container has a laminate including a resin layer and a metal layer in this order from the heat absorbing agent side.
  • the laminate has a hole penetrating the resin layer and the metal layer. The periphery of the hole is sealed by the resin layer surrounding the hole.
  • the battery pack according to the second aspect of the present technology includes a battery, a heat absorbing agent, and a heat absorbing member having a container that contains the heat absorbing agent. Both the battery and the container are flat.
  • the container has a first surface disposed adjacent to the battery, a second surface that faces the first surface via the heat absorbing agent, and a through hole that penetrates the first surface and the second surface. The periphery of the through hole is sealed by the surrounding portion of the first surface and the surrounding portion of the second surface.
  • the container that holds the heat-absorbing agent is constructed of a laminate including a resin layer and a metal layer, and the periphery of the hole that penetrates the laminate is sealed with the resin layer surrounding the hole, so that the heat of the abnormally heated battery causes the welded portion of the resin layer to peel off, and the heat-absorbing agent released from the hole can be brought into contact with the abnormally heated battery, thereby cooling the abnormally heated battery.
  • the abnormally heated battery can be effectively cooled. Therefore, the abnormally heated battery can be sufficiently cooled by the heat-absorbing member.
  • the periphery of the through hole penetrating the first and second surfaces of the container that contains the heat absorbing agent is sealed by the surrounding portion of the through hole in the first surface and the surrounding portion of the through hole in the second surface, so that the heat of the abnormally heated battery causes the welded portion of the container to peel off, and the heat absorbing agent released from the container can be brought into contact with the abnormally heated battery, thereby cooling the abnormally heated battery.
  • the abnormally heated battery can be effectively cooled. Therefore, the abnormally heated battery can be sufficiently cooled by the heat absorbing member.
  • FIG. 1 is a diagram illustrating an example of a perspective configuration of a battery pack according to an embodiment of the present technology.
  • FIG. 2 is a perspective view illustrating an example of the configuration of a battery module accommodated in the battery pack of FIG.
  • FIG. 3 is a perspective view showing an example of the structure of the battery pack of FIG. 1 in an exploded view.
  • FIG. 4 is a diagram illustrating an example of a cross-sectional configuration of the battery module of FIG.
  • FIG. 5 is a perspective view illustrating an example of the heat absorption module of FIG.
  • Fig. 6(A) is a perspective view of an example of the heat absorbing member of Fig. 5.
  • Fig. 6(B) is a cross-sectional view of the heat absorbing member of Fig.
  • FIG. 6(A) taken along line A-A.
  • Fig. 6(C) is a cross-sectional view of the heat absorbing member of Fig. 6(A) taken along line B-B.
  • FIG. 7 is a diagram illustrating an example of a cross-sectional configuration of a portion of the heat absorbing member of FIG.
  • Fig. 8(A) is an enlarged view of a cross-sectional configuration example of a portion of Fig. 6(B)
  • Fig. 8(B) is an enlarged view of a cross-sectional configuration example of a portion of Fig. 6(C)
  • Fig. 8(C) is an enlarged view of a cross-sectional configuration example of a portion of the flange portion of Fig. 6(A).
  • FIG. 9 is a diagram illustrating an example of a side configuration of the heat absorbing member of FIG.
  • FIG. 10 is an enlarged perspective view illustrating an example of a configuration of a portion of the heat absorbing member of FIG.
  • Fig. 11(A) is a diagram showing an example of a manufacturing process for a hole
  • Fig. 11(B) is a diagram showing an example of a manufacturing process subsequent to Fig. 11(A)
  • Fig. 11(C) is a diagram showing an example of a manufacturing process subsequent to Fig. 11(B).
  • FIG. 12 is a diagram showing a modified example of the cross-sectional structure of the heat absorbing member shown in FIG. 8(B).
  • FIG. 13(A) is a diagram showing a modified example of the perspective configuration of the heat absorbing member of Fig. 6(A).
  • Fig. 13(B) is a diagram showing an example of the cross-sectional configuration of the heat absorbing member of Fig. 13(A) taken along line A-A.
  • Fig. 13(C) is a diagram showing an example of the cross-sectional configuration of the heat absorbing member of Fig. 13(A) taken along line B-B.
  • FIG. 14 is a diagram showing a modification of the planar configuration of the battery module of FIG.
  • FIG. 15 is a perspective view showing an example of the battery module shown in FIG. 14 in an exploded view.
  • FIG. 16 is a perspective view illustrating an example of the heat absorbing member of FIG. FIG.
  • FIG. 17 is a diagram showing an example of a cross-sectional configuration of the heat absorbing member taken along line AA of FIG.
  • FIG. 18 is a diagram showing a modified example of the cross-sectional configuration of the heat absorbing member shown in FIG.
  • FIG. 19 is a diagram showing a modified example of the cross-sectional configuration of the heat absorbing member shown in FIG.
  • FIG. 20 is a diagram showing a modified example of the cross-sectional configuration of the heat absorbing member shown in FIG.
  • the battery pack described here is a power source comprising multiple batteries, and is applicable to a variety of uses, such as electronic devices. Uses of the battery pack will be described in detail below.
  • the type of battery is not particularly limited, and may be a primary battery or a secondary battery.
  • the type of secondary battery is not particularly limited, but specifically may be a lithium ion secondary battery, which obtains battery capacity by utilizing the absorption and release of lithium ions.
  • the number of batteries is not particularly limited, and may be set as desired. Below, a case will be described in which the battery is a secondary battery (lithium ion secondary battery).
  • the battery pack described below is a power source comprising multiple secondary batteries.
  • FIG. 1 shows an example of a perspective configuration of a battery pack 1 according to an embodiment of the present technology.
  • FIG. 2 shows an example of a perspective configuration of a battery module 20 housed in the battery pack 1.
  • FIG. 3 shows an example of an expanded perspective configuration of the battery pack 1.
  • FIG. 4 shows an example of a cross-sectional configuration of the battery module 20.
  • the battery pack 1 comprises an exterior case 10, a battery module 20, a number of metal tabs 60, and a control board 70.
  • the control board 70 is connected to the positive and negative terminals of the battery module 20 via the number of metal tabs 60, for example, and has circuits that measure the voltage of the battery and the battery module 20, detect the remaining capacity of the battery module 20, and measure the current output from the battery module 20 to detect the presence or absence of an overcurrent.
  • the exterior case 10 houses the battery module 20, the multiple metal tabs 60, and the control board 70.
  • the exterior case 10 is composed of a lower case 10a and an upper case 10b.
  • the lower case 10a and the upper case 10b are stacked on top of each other to form a storage space that houses the battery module 20, the multiple metal tabs 60, and the control board 70.
  • the exterior case 10 (for example, the lower case 10a) is provided with an external terminal 11 connected to the control board 70.
  • the battery module 20 is connected to the external terminal 11 via the control board 70.
  • the battery pack 1 has a discharge mode in which it supplies power output from the battery module 20 to a load via the external terminal 11.
  • the battery pack 1 may further have a charge mode in which it accumulates power supplied via the external terminal 11 from a power source connected to the external terminal 11 in the battery module 20.
  • the control board 70 is configured to switch between the discharge mode and the charge mode depending on the type of connected object connected to the external terminal 11.
  • the control board 70 is configured to execute only the discharge mode.
  • the battery module 20 has a plurality of batteries 30, for example, as shown in Figures 2 and 3.
  • the plurality of batteries 30 are electrically connected via a plurality of metal tabs 60.
  • Each battery 30 has a positive electrode 31 and a negative electrode 32, for example, as shown in Figure 2.
  • Each battery 30 is, for example, a cylindrical battery in which the positive electrode 31 and the negative electrode 32 extend in a direction facing each other.
  • some of the plurality of batteries 30 are connected in series with each other by a plurality of metal tabs 60, and when the plurality of batteries 30 connected in series with each other are referred to as a series unit, the plurality of series units are connected in parallel with each other by a plurality of metal tabs 60.
  • the connection mode of the plurality of batteries 30 is not limited to the above.
  • Each metal tab 60 is, for example, composed of a metal lead plate.
  • Each battery 30 is a primary battery or a secondary battery.
  • the type of secondary battery is not particularly limited, but specifically, it is a lithium ion secondary battery that obtains battery capacity by utilizing the absorption and release of lithium ions.
  • each battery 30 is a secondary battery (lithium ion secondary battery).
  • the battery pack 1 described below is a power source equipped with multiple secondary batteries.
  • the battery module 20 further includes a battery holder 40 that supports the multiple batteries 30, and multiple heat absorption members 50 arranged between the multiple batteries 30, as shown in Figures 2 and 3, for example.
  • the battery holder 40 has a structure that supports the multiple batteries 30 in a hierarchical manner with a predetermined gap between them.
  • the heat absorption members 50 will be described in detail later.
  • FIG. 4 shows an example of the cross-sectional configuration of the battery module 20.
  • the battery holder 40 is composed of a pair of holders 40a and 40b, as shown in FIG. 3 and FIG. 4. Both holders 40a and 40b have a common structure.
  • Each of the holders 40a and 40b has a side plate portion 41, for example as shown in FIG. 4.
  • the side plate portion 41 of the holder 40a and the side plate portion 41 of the holder 40b are arranged opposite each other with the batteries 30 between them in the extension direction of each battery 30 (the direction in which the positive electrodes 31 and negative electrodes 32 face each other).
  • the side plate portion 41 has an opening 42 at a position facing the positive electrode 31 and negative electrode 32 of each battery 30. Therefore, the positive electrode 31 or negative electrode 32 is exposed in the opening 42.
  • Each of the holders 40a and 40b further has a support section 43 that supports a plurality of batteries 30 in a hierarchical manner with a predetermined gap therebetween, for example, as shown in FIG. 4.
  • a side plate section 41 is connected to each end of the support section 43.
  • the support section 43 supports four or more cylindrical batteries 30 in a hierarchical manner with a predetermined gap therebetween.
  • the support section 43 has an opening 44 at a location surrounded by four adjacent cylindrical batteries 30, for example, as shown in FIG. 4.
  • a heat absorption module 50m consisting of two overlapping heat absorption members 50 is arranged at a position surrounded by four adjacent cylindrical batteries 30, for example, as shown in FIG. 4 and FIG. 5, and contacts the outer circumferential surfaces of the four cylindrical batteries 30 through the opening 44.
  • the heat absorption module 50m extends in a direction parallel to the extension direction of each battery 30 (the direction in which the positive electrode 31 and the negative electrode 32 face each other).
  • Each heat absorption member 50 constituting the heat absorption module 50m also extends in a direction parallel to the extension direction of each battery 30 (the direction in which the positive electrode 31 and the negative electrode 32 face each other).
  • one heat absorption member 50 contacts the outer peripheral surface of two batteries 30 arranged in the upper row of the four adjacent cylindrical batteries 30, and the other heat absorption member 50 contacts the outer peripheral surface of two batteries 30 arranged in the lower row of the four adjacent cylindrical batteries 30.
  • the flat surfaces flat surface S4 described below (see FIG.
  • the opening 44 contacts the side plate portion 41 of the holder 40a and the side plate portion 41 of the holder 40b, and the heat absorption member 50 contacts the side plate portion 41 of the holder 40a and the side plate portion 41 of the holder 40b through the opening 44.
  • FIG. 6(A) shows an example of a perspective configuration of the heat absorption member 50.
  • FIG. 6(B) shows an example of a cross-sectional configuration of the heat absorption member 50 taken along line A-A.
  • FIG. 6(C) shows an example of a cross-sectional configuration of the heat absorption member 50 taken along line B-B.
  • the heat absorption member 50 has a shape corresponding to the shape of the gaps between the multiple batteries 30 supported by the battery holder 40 (supporting portion 43).
  • the heat absorption member 50 has a long and thin columnar shape. Here, it is assumed that four or more cylindrical batteries 30 are supported by the battery holder 40 (supporting portion 43) in a hierarchical manner with a predetermined gap between them.
  • the heat absorption module 50m consisting of two overlapping heat absorption members 50 is in contact with the surfaces (outer peripheral surfaces) of the four adjacent cylindrical batteries 30, and has a shape corresponding to the shape of the gaps between the four adjacent cylindrical batteries 30, for example.
  • the cross section perpendicular to the extension direction of the heat absorption module 50m is substantially rhombic.
  • the cross section perpendicular to the extension direction of the heat absorption member 50 is substantially triangular.
  • the two adjacent cylindrical batteries 30 are referred to as the first battery 30 and the second battery 30.
  • the heat absorption member 50 has an arc wall W1 (arc surface S1) extending along the outer peripheral surface of the first battery 30, and an arc wall W2 (arc surface S2) extending along the outer peripheral surface of the second battery 30.
  • the arc wall W2 is disposed in a position adjacent to the arc wall W1.
  • the two arc walls W1, W2 (or the two arc surfaces S1, S2) have a concave shape following the outer peripheral surface of the battery 30.
  • the arc wall W1 corresponds to a specific example of the "first stacked portion" of the present technology.
  • the arc wall W2 corresponds to a specific example of the "second stacked portion" of the present technology.
  • the heat absorbing member 50 further has end walls W3 at both ends in the longitudinal direction of the heat absorbing member 50 that constitute part of the longitudinal ends of the heat absorbing member 50, and has flat walls W4 (flat surfaces S4) at locations that face the arc walls W1 and W2 via the heat absorbing agent 54 described below.
  • the end walls W3 are disposed in positions adjacent to both the arc walls W1 and W2.
  • the end walls W3 correspond to a specific example of a "third laminated portion" of the present technology.
  • the heat absorbing member 50 has, for example, a heat absorbing agent 54 and a container 51 that covers the heat absorbing agent 54, as shown in FIG. 6(B).
  • the container 51 covers the heat absorbing agent 54.
  • the container 51 is formed, for example, by filling a container in which a laminated portion 52A (described later) and a laminated portion 52B (described later) are heat-sealed except for one side, with the heat absorbing agent 54, and then heat-sealing the remaining side, which is the filling port.
  • the container 51 contains the heat absorbing agent 54.
  • the laminated body 52 after molding is composed of a laminated portion 52A and a laminated portion 52B, for example, as shown in FIG. 6B.
  • the laminated portion 52A constitutes the arc walls W1 and W2 and the end wall W3, and the laminated portion 52B constitutes the flat wall W4.
  • the laminated portion 52A and the laminated portion 52B are formed, for example, integrally with each other and are connected to each other at a flange portion 51B (described later).
  • the container 51 has a storage section 51A that stores a heat absorbing agent 54, and a flange section 51B formed around the storage section 51A.
  • the storage section 51A corresponds to a roughly triangular prism-shaped portion of the container 51 that is made up of the arc walls W1 and W2, the end wall W3, and a portion of the flat wall W4.
  • the flange section 51B corresponds to a plate-shaped portion of the container 51 that is formed to surround the storage section 51A when viewed from the normal direction of the flat wall W4.
  • the container 51 (laminate 52, laminated portion 52A, laminated portion 52B) is configured to include a resin layer formed of a thermoplastic material.
  • the container 51 (laminate 52, laminated portion 52A, laminated portion 52B) is configured to include, for example, a resin layer 52a as shown in FIG. 7.
  • the resin layer 52a is configured from a resin material such as, for example, polyethylene, polystyrene, polypropylene, polycarbonate, etc.
  • the container 51 (laminate 52, laminated portion 52A, laminated portion 52B) may be made of, for example, a laminate film.
  • the container 51 (laminate 52, laminated portion 52A, laminated portion 52B) is made of, for example, a resin layer 52a and a metal layer 52b in this order from the heat absorbing agent 54 side, as shown in FIG. 7.
  • the container 51 (laminate 52, laminated portion 52A, laminated portion 52B) is made of, for example, a resin layer 52a.
  • the metal layer 52b is made of, for example, a metal foil such as aluminum foil.
  • the heat absorbing agent 54 is composed of, for example, a liquid containing water or a hydrogel.
  • a hydrogel As the heat absorbing agent 161, it is preferable to use a synthetic polymer gel.
  • materials for the synthetic polymer gel include sodium polyacrylate (PNaAA), polyvinyl alcohol (PVA), polyhydroxyethyl methacrylate (PHE-MA), and silicone hydrogel.
  • Figures 8(A) and 8(B) are enlarged views of the folded portion of the storage section 51A provided in the stacked portion 52A.
  • Figure 8(A) shows an enlarged view of the folded portion taken along line A-A in Figure 6(A).
  • Figure 8(B) shows an enlarged view of the folded portion taken along line B-B in Figure 6(A).
  • Figure 8(C) shows an enlarged view of the flange portion 51B.
  • Figure 9 shows an example of the side configuration of the heat absorption member 50.
  • Figure 10 shows an enlarged view of a portion of the heat absorption member 50.
  • the laminated portion 52A is bent at an acute angle at the boundary ⁇ between the arc wall W1 and the arc wall W2, as shown in Figures 6(B) and 8(A), for example.
  • a part of the resin layer 52a of the arc wall W1 and a part of the resin layer 52a of the arc wall W2 are welded to each other, as shown in Figures 8(A) and 9, for example.
  • a part of the resin layer 52a of the arc wall W2 and a part of the resin layer 52a of the flat wall W4 are welded to each other.
  • a part of the resin layer 52a of the arc wall W2 and a part of the resin layer 52a of the flat wall W4 are sealed by adhesion.
  • the part where a part of the resin layer 52a of the arc wall W2 and a part of the resin layer 52a of the flat wall W4 are welded (sealed) to each other is the welded part 52D.
  • the flange portion 51B has no notches or through holes, as shown in FIG. 8C, for example. Therefore, the flange portion 51B is covered with a metal layer 52b, and the heat absorbing agent 54 is not released to the outside from the flange portion 51B.
  • the laminated portion 52A has one or more notches 51C at the boundary ⁇ (folded portion) between the arc wall W1 and the arc wall W2, as shown in FIG. 6C, FIG. 8B, FIG. 9, and FIG. 10, for example.
  • the one or more notches 51C are disposed close to the peripheral surfaces of both the first battery 30 and the second battery 30 described above.
  • the one or more notches 51C are provided at a position spaced apart from the end wall W3.
  • Each notch 51C is provided in the central region in the longitudinal direction of the container 51.
  • the "central region” refers to, for example, a region at the boundary ⁇ (folded portion) between the two end walls W3, which is separated from the end wall W3 by a length equal to the height of the end wall W3.
  • each cutout 51C On the surface of each cutout 51C, as shown in, for example, FIG. 8B and FIG. 10, a welded portion 52C is exposed. That is, each cutout 51C penetrates the laminated portion 52A. Therefore, when the welded portion 52C in each cutout 51C melts due to, for example, the heat of the abnormally heated battery 30, the heat absorbing agent 54 leaks out through each cutout 51C to the outside (for example, the periphery of the abnormally heated battery 30). Therefore, each cutout 51C has a hole 51D penetrating the laminated portion 52A. For example, as shown in FIG. 9, the periphery of the hole 51D is welded by the welded portion 52C. Also, for example, as shown in FIG. 10, the hole 51D is welded by the welded portion 52C.
  • Figures 11(A) to 11(C) show an example of the manufacturing process for hole 51D.
  • a laminate 52 formed into a mountain shape is prepared ( Figure 11(A)).
  • the ridge of the mountain-shaped portion of laminate 52 is sandwiched between two flat mold pieces, and in this state, each mold piece is heated to a predetermined temperature.
  • the heat from each mold piece is transmitted to resin layer 52a in laminate 52, and a part of resin layer 52a is welded to form welded portion 52C ( Figure 11(B)).
  • one or more cutout portions 51C are formed in laminate 52 at the locations where welded portion 52C is formed.
  • hole 51D is formed in cutout portion 51C ( Figure 11(C)). In this manner, hole 51D is manufactured.
  • a heat absorbing member is in contact with the side of the battery unit, and the heat absorbing member contains a heat absorbing agent (gel-like fluid) inside an exterior film (see, for example, Patent Document 1).
  • the container 51 that contains the heat-absorbing agent 54 is composed of a laminate 52 including a resin layer 52a and a metal layer 52b, and the periphery of a hole 51D that penetrates the laminate 52 is welded by a welded portion 52C.
  • the heat of the abnormally heated battery 30 causes the welded portion of the resin layer 52a to peel off, and the heat-absorbing agent 54 released from the hole 51D comes into contact with the abnormally heated battery 30, cooling the abnormally heated battery 30.
  • the welded portion 52C of the resin layer 52a at a desired location on the container 51, the abnormally heated battery 30 can be effectively cooled. Therefore, the abnormally heated battery 30 can be sufficiently cooled by the heat-absorbing member 50.
  • an end wall W3 constituting part of the end of the container 51 is provided adjacent to both of the arc walls W1 and W2, and the holes 51D are provided at a position spaced apart from the end wall W3.
  • each hole 51D is provided in the central region in the longitudinal direction of the container 51. This makes it possible to eliminate the risk of wrinkles being formed at the end of the container 51 and deformation occurring when the holes 51D are formed during the manufacturing process of the heat absorption member 50.
  • the laminate 52 has an acutely bent shape (bent portion) at the boundary between the arc wall W1 and the arc wall W2, and the hole 51D is formed at the bent portion.
  • the hole 51D is disposed, for example, close to the peripheral surfaces of both the first battery 30 and the second battery 30.
  • each battery 30 is a cylindrical battery, and multiple heat absorption members 50 are arranged in a position surrounded by four adjacent batteries 30.
  • the heat generated by the abnormally heated battery 30 is absorbed by the heat absorption member 50, and the rate at which heat is transmitted to the battery 30 adjacent to the abnormally heated battery 30 can be significantly reduced.
  • the heat absorption member 50 has four arc walls W1. This increases the contact area between the heat absorption member 50 and the four batteries 30 arranged around the heat absorption member 50. As a result, the heat absorption member 50 can efficiently absorb the heat generated by a battery 30 that is experiencing abnormal heat generation.
  • the laminate 52 may have a configuration in which the metal layer 52b is sandwiched between the resin layers 52a and 52c as shown in Fig. 12.
  • the resin layer 52c is made of a resin material such as polyethylene, polystyrene, polypropylene, polycarbonate, etc.
  • the hole 51D penetrates the resin layer 52c.
  • the metal layer 52b is covered with the resin layer 52c, so that it is possible to prevent the metal layer 52b from shorting out with the conductor in the battery module 20.
  • Fig. 13(A) shows an example of a perspective configuration of the heat absorbing member 50 according to this modified example.
  • Fig. 13(B) shows an example of a cross-sectional configuration of the heat absorbing member 50 of Fig. 13(A) taken along line A-A.
  • Fig. 13(C) shows an example of a cross-sectional configuration of the heat absorbing member 50 of Fig. 13(A) taken along line B-B.
  • the heat absorption member 50 may have a cylindrical laminate 55, for example, as shown in Figures 13(B) and 13(C).
  • the laminate 55 has, for example, arc walls W1, W2, arc surfaces S1, S2, arc walls W5, W6, and arc surfaces S5, S6.
  • the two arc walls W5, W6 and the two arc surfaces S5, S6 have a concave shape that follows the outer peripheral surface of the battery 30.
  • the arc wall W6 is located adjacent to the arc wall W5.
  • the arc surface S6 is located adjacent to the arc surface S5.
  • the laminate 55 corresponds to a specific example of the "first laminate portion” and "second laminate portion” of the present technology.
  • the arc wall W5 corresponds to a specific example of the "fourth laminate portion” of the present technology.
  • the arc wall W6 corresponds to a specific example of the "fifth laminate portion” of the present technology.
  • the heat absorption member 50 further has an end wall W3 arranged adjacent to both the arc walls W1 and W2, and an end wall W3 arranged adjacent to both the arc walls W5 and W6.
  • the container 51 is formed, for example, by heating and molding the heat absorbing agent 54 and the laminate 55 in a state where the heat absorbing agent 54 is covered with the cylindrical laminate 55.
  • the container 51 has a storage section 51A that stores the heat absorbing agent 54 and a flange section 51B formed around the storage section 51A, as shown in, for example, Figures 13(A), 13(B) and 13(C).
  • the storage section 51A corresponds to the approximately diamond-shaped columnar section of the container 51 that is composed of the arc walls W1 and W2, the four end walls W3 and the arc walls W5 and W6.
  • the flange section 51B corresponds to the plate-shaped section of the container 51 that is formed to surround the storage section 51A when the entire arc walls W1 and W2 are viewed from a direction in which they can be seen.
  • the container 51 (laminate 55) is configured to include, for example, a resin layer 52a and a metal layer 52b in this order from the heat absorbing agent 54 side.
  • the laminate 55 has a shape bent at an acute angle at the boundary ⁇ between the arc wall W1 and the arc wall W2, as shown in FIG. 13(B), for example.
  • a part of the resin layer 52a of the arc wall W1 and a part of the resin layer 52a of the arc wall W2 are welded to each other, as shown in FIG. 13(B).
  • a part of the resin layer 52a of the arc wall W1 and a part of the resin layer 52a of the arc wall W2 are sealed by adhesion.
  • the part where a part of the resin layer 52a of the arc wall W1 and a part of the resin layer 52a of the arc wall W2 are welded (sealed) to each other is the welded portion 52C in FIG. 13(B).
  • the laminate 55 has a shape bent at an acute angle at the boundary ⁇ between the arc walls W5 and W6, as shown in FIG. 13(B), for example.
  • a portion of the resin layer 52a of the arc wall W5 and a portion of the resin layer 52a of the arc wall W6 are welded to each other, as shown in FIG. 13(B), for example.
  • the portion where a portion of the resin layer 52a of the arc wall W5 and a portion of the resin layer 52a of the arc wall W6 are welded to each other is the welded portion 52F in FIG. 13(B).
  • the laminate 55 has one or more cutouts 51C at the boundary ⁇ (folded portion) between the arc walls W1 and W2, as shown in FIG. 13(A) and FIG. 13(C), for example.
  • the one or more cutouts 51C are arranged close to the circumferential surfaces of both the first battery 30 and the second battery 30 described above.
  • the one or more cutouts 51C are provided at a position spaced apart from the end wall W3.
  • Each cutout 51C is provided in the central region in the longitudinal direction of the container 51.
  • the "central region” refers to, for example, a region at the boundary ⁇ (folded portion) between the two end walls W3, which is spaced apart from the end wall W3 by a length equal to the height of the end wall W3.
  • each cutout 51C On the surface of each cutout 51C, a welded portion 52C is exposed, as shown in FIG. 13(C), for example. In other words, each cutout 51C penetrates the laminate 55. Therefore, when the welded portion 52C melts in each cutout 51C due to heat from the abnormally heated battery 30, the heat absorbing agent 54 leaks out through each cutout 51C to the outside (for example, the periphery of the abnormally heated battery 30). Therefore, each cutout 51C has a hole 51D penetrating the laminate 55.
  • the laminate 55 further has one or more cutouts 51E at the boundary ⁇ (folded portion) between the arc walls W5 and W6, as shown in FIG. 13(C), for example.
  • the one or more cutouts 51E are arranged close to the circumferential surfaces of both the first battery 30 and the second battery 30.
  • the one or more cutouts 51E are provided at a position spaced apart from the end wall W3.
  • Each cutout 51E is provided in the central region in the longitudinal direction of the container 51.
  • the "central region” refers to, for example, a region at the boundary ⁇ (folded portion) between the two end walls W3, which is spaced apart from the end wall W3 by a length equal to the height of the end wall W3.
  • each cutout 51E On the surface of each cutout 51E, a welded portion 52F is exposed, as shown in FIG. 13(C), for example.
  • each cutout 51E penetrates the laminate 55. Therefore, when the welded portion 52F in each cutout portion 51E melts due to the heat of the battery 30 that is abnormally generating heat, the heat absorbing agent 54 leaks out through each cutout portion 51E to the outside (for example, the periphery of the battery 30 that is abnormally generating heat). Therefore, each cutout portion 51E has a hole 51F that penetrates the laminate 55.
  • holes 51D, 51F Next, a method for manufacturing holes 51D, 51F will be described.
  • a laminate 55 formed into a mountain shape is prepared.
  • the ridge of the mountain-shaped portion of laminate 55 is sandwiched between two flat mold pieces, and in this state, each mold piece is heated to a predetermined temperature. As a result, the heat from each mold piece is transmitted to resin layer 52a in laminate 55, and a part of resin layer 52a is welded to form welded portion 52C.
  • one or more cutout portions 51C, 51E are formed in laminate 55 at the location where welded portion 52C is formed. As a result, hole 51D is formed in cutout portion 51C, and hole 51F is formed in cutout portion 51E. In this manner, holes 51D, 51F are manufactured.
  • the container 51 containing the heat absorbing agent 54 is composed of a laminate 52 including a resin layer 52a and a metal layer 52b, and the periphery of holes 51D, 51F penetrating the laminate 52 is welded by welded parts 52C, 52F.
  • the heat of the abnormally heated battery 30 causes the welded parts of the resin layer 52a to peel off, and the heat absorbing agent 54 released from the holes 51D, 51F comes into contact with the abnormally heated battery 30, cooling the abnormally heated battery 30.
  • the welded parts 52C, 52F of the resin layer 52a at the desired locations of the container 51, the abnormally heated battery 30 can be effectively cooled. Therefore, the abnormally heated battery 30 can be sufficiently cooled by the heat absorbing member 50.
  • the boundary ⁇ between the arc wall W1 and the arc wall W2 of the laminate 55 is formed with an acutely angled shape (bent portion), and the hole 51D is formed in the bent portion.
  • the hole 51D is disposed, for example, close to the circumferential surface of both the first battery 30 and the second battery 30.
  • the laminate 55 is further formed with an acutely bent shape (bent portion) at the boundary ⁇ between the arc wall W5 and the arc wall W6, and the hole 51F is formed at the bent portion.
  • the hole 51F is disposed, for example, close to the peripheral surfaces of both the first battery 30 and the second battery 30.
  • an end wall W3 constituting a part of the end of the container 51 is provided adjacent to both of the arc walls W1 and W2, and the holes 51D are provided at a position spaced apart from the end wall W3.
  • each hole 51D is provided in a central region in the longitudinal direction of the container 51.
  • an end wall W3 constituting a part of the end of the container 51 is further provided at a position adjacent to both of the arc walls W5 and W6, and the holes 51F are provided at a position spaced apart from the end wall W3.
  • each hole 51F is provided in a central region in the longitudinal direction of the container 51. This makes it possible to eliminate the risk of wrinkles being formed at the end of the container 51 and deformation occurring when the holes 51D and 51F are formed during the manufacturing process of the heat absorption member 50.
  • the laminate 55 may have a configuration in which the metal layer 52b is sandwiched between the resin layers 52a and 52c.
  • the holes 51D and 51F penetrate the resin layer 52c.
  • the metal layer 52b is covered by the resin layer 52c, so that it is possible to more reliably prevent the metal layer 52b from shorting out with the conductors in the battery module 20.
  • a battery module 200 as shown in Fig. 14 and Fig. 15 may be provided instead of the battery module 20.
  • Fig. 14 shows an example of a perspective configuration of the battery module 200.
  • Fig. 15 shows an example of an exploded perspective configuration of the battery module 200.
  • the battery module 200 has a plurality of batteries 210 and a plurality of heat absorption members 220 as shown in Fig. 14 and Fig. 15, for example.
  • the multiple batteries 210 are stacked in the thickness direction of the battery 210.
  • the thickness direction of the battery 210 refers to the direction in which the top surface of the battery 210 and the bottom surface of the battery 210 face each other.
  • the top surface of the battery 210 refers to the top surface of the battery 210 when the battery module 200 is housed in the exterior case 10.
  • the bottom surface of the battery 210 refers to the bottom surface of the battery 210 when the battery module 200 is housed in the exterior case 10.
  • the multiple heat absorption members 220 are stacked in the same direction as the stacking direction of the multiple batteries 210.
  • the multiple batteries 210 and the multiple heat absorption members 220 are alternately arranged in the stacking direction of the multiple batteries 210.
  • One heat absorption member 220 is provided between two adjacent batteries 210.
  • the heat absorption member 220 is in contact with each of the two batteries 210 arranged above and below the heat absorption member 220.
  • the multiple batteries 210 are electrically connected via multiple metal tabs.
  • the batteries 210 are flat laminate film type batteries.
  • the batteries 210 have, for example, positive and negative electrodes on their sides.
  • a portion of the multiple batteries 210 are connected in series with each other via multiple metal tabs, and when the multiple batteries 210 connected in series with each other are referred to as a series unit, the multiple series units are connected in parallel with each other via multiple metal tabs. Note that the connection of the multiple batteries 210 is not limited to the above.
  • Each battery 210 is a primary battery or a secondary battery.
  • the type of secondary battery is not particularly limited, but specifically, it may be a lithium ion secondary battery that obtains battery capacity by utilizing the absorption and release of lithium ions.
  • the battery pack 1 described below is a power source equipped with multiple secondary batteries.
  • FIG. 16 shows an example of a perspective configuration of the heat absorption member 220.
  • FIG. 17 shows an example of a cross-sectional configuration of the heat absorption member 220 taken along line A-A.
  • the heat absorption member 220 has a flat plate shape, for example, as shown in FIG. 16.
  • the heat absorption member 220 has a heat absorption agent 54 and a container 230 that covers the heat absorption agent 54, for example, as shown in FIG. 17.
  • the container 230 has a first surface Sa disposed adjacent to the first battery 210, and a second surface Sb facing the first surface Sa via a heat absorbing agent 54.
  • the second surface Sb is disposed adjacent to the second battery 210 adjacent to the first battery 210.
  • the container 230 has one or more through holes 240 penetrating the first surface Sa and the second surface Sb, as shown in FIG. 17, for example.
  • the periphery of each through hole 240 is sealed by the surrounding portion of the first surface Sa of the through hole 240 and the surrounding portion of the second surface Sb of the through hole 240.
  • the container 230 has a laminate 56 having a first surface Sa, and a laminate 57 having a second surface Sb.
  • the laminates 56 and 57 each include a resin layer 52a and a metal layer 52b, in that order, from the heat absorbing agent 54 side.
  • Each through hole 240 penetrates the first surface Sa and the second surface Sb, and penetrates both the laminate 56 and the laminate 57.
  • the periphery of the through hole 240 is sealed by the surrounding portion of the through hole 240 on the first surface Sa and the surrounding portion of the through hole 240 on the second surface Sb.
  • the periphery of the through hole 240 is sealed by the surrounding portion of the through hole 240 on the resin layer 52a of the laminate 56 and the surrounding portion of the through hole 240 on the resin layer 52a of the laminate 57.
  • the portion where the surrounding portion of the through hole 240 on the resin layer 52a of the laminate 56 and the surrounding portion of the through hole 240 on the resin layer 52a of the laminate 57 are welded (sealed) to each other is the welded portion 52G.
  • a welded portion 52G is exposed on the end face (inner surface) of each through hole 240. Therefore, when the welded portion 52G melts in each through hole 240 due to the heat of, for example, an abnormally heated battery 30, the heat absorbing agent 54 is released to the outside (for example, the periphery of the abnormally heated battery 30) through each through hole 240. Therefore, a release portion 51G is provided on the end face (inner surface) of each through hole 240, penetrating the end face (inner surface) of each through hole 240. For example, as shown in FIG. 17, the periphery of the release portion 51G is welded by the welded portion 52G. Also, for example, as shown in FIG. 17, the release portion 51G is welded by the welded portion 52G.
  • the welded portion 52G and the discharge portion 51G are provided at a location closer to the first surface Sa than to the second surface Sb, for example, as shown in FIG. 17.
  • the welded portion 52G and the discharge portion 51G are provided at a location closer to the battery 2220 provided on the first surface Sa than to the battery 220 provided on the second surface Sb.
  • the container 230 is provided with a first surface Sa, a second surface Sb, and one or more through holes 240, and the periphery of each through hole 240 is sealed (welded) by the surrounding portion of the through hole 230 on the first surface Sa and the surrounding portion of the through hole 240 on the second surface Sb.
  • the welded portion 52G is peeled off by the heat of the abnormally heated battery 30, and the heat absorbing agent 54 released from the welded portion 52G comes into contact with the abnormally heated battery 30, thereby cooling the abnormally heated battery 30.
  • the through hole 240 and the welded portion 52G at the desired location of the container 230, the abnormally heated battery 30 can be effectively cooled. Therefore, the abnormally heated battery 30 can be sufficiently cooled by the heat absorbing member 50.
  • each through hole 240 is sealed (welded) by the surrounding portion of the through hole 240 in the resin layer 52a of the laminate 56 and the surrounding portion of the through hole 240 in the resin layer 52a of the laminate 57.
  • the welded portion 52G is peeled off by the heat of the abnormally heated battery 30, and the heat absorbing agent 54 released from the welded portion 52G comes into contact with the abnormally heated battery 30, thereby cooling the abnormally heated battery 30.
  • the abnormally heated battery 30 can be effectively cooled. Therefore, the abnormally heated battery 30 can be sufficiently cooled by the heat absorbing member 50.
  • the container 230 may have a through hole 240 with a welded portion 52G and an emission portion 51G provided at a location closer to the first surface Sa than the second surface Sb, and a through hole 240 with a welded portion 52G and an emission portion 51G provided at a location closer to the second surface Sb than the first surface Sa, as shown in Fig. 18.
  • the container 230 may have a through hole 240 with a welded portion 52G and an emission portion 51G provided at a location closer to the battery 220 provided on the first surface Sa side than the battery 220 provided on the second surface Sb side, and a through hole 240 with a welded portion 52G and an emission portion 51G provided at a location closer to the battery 220 provided on the second surface Sb side than the battery 220 provided on the first surface Sa side.
  • the welded portion 52G provided near the abnormally heated battery 220 peels off due to the heat of the abnormally heated battery 30, and the heat absorbing agent 54 released from the welded portion 52G comes into contact with the abnormally heated battery 30, thereby cooling the abnormally heated battery 30.
  • the abnormally heated battery 30 can be effectively cooled. Therefore, the abnormally heated battery 30 can be sufficiently cooled by the heat absorbing member 50.
  • the laminate 55 may be configured, for example, as shown in Figures 19 and 20, in which the metal layer 52b is sandwiched between the resin layers 52a and 52c.
  • the holes 51D and 51F penetrate the resin layer 52c.
  • the metal layer 52b is covered by the resin layer 52c, so that it is possible to prevent the metal layer 52b from shorting out with the conductors in the battery module 20.
  • the type of the electrode reactant is not particularly limited.
  • the electrode reactant may be other Group 1 elements in the long-form periodic table, such as sodium and potassium, or Group 2 elements in the long-form periodic table, such as magnesium and calcium, or other light metals, such as aluminum.
  • the present technology can also be configured as follows. ⁇ 1> Batteries and a heat absorbing member having a heat absorbing agent and a container for accommodating the heat absorbing agent; the heat absorbing member is disposed adjacent to the battery, the container has a first laminate including a first resin layer and a first metal layer in this order from the heat absorbing agent side, the first laminate has a first hole penetrating the first resin layer and the first metal layer; the periphery of the first hole is sealed by the first resin layer surrounding the first hole.
  • the battery is a cylindrical battery, A plurality of the batteries are arranged side by side,
  • the container has a columnar shape extending in the longitudinal direction of the battery,
  • the first laminate is a first stacked portion along a circumferential surface of the first battery; a second stacked portion disposed adjacent to the first stacked portion and extending along a peripheral surface of a second battery adjacent to the first battery, the first laminate has the first hole at a boundary between the first laminate portion and the second laminate portion,
  • the first laminate further includes a third laminate portion disposed adjacent to both the first laminate portion and the second laminate portion and constituting a part of an end portion of the container;
  • the battery pack according to ⁇ 2> wherein the first hole is provided at a position at the boundary spaced apart from the third stacked portion.
  • the battery pack according to ⁇ 3> wherein the first hole is provided in a central region in a longitudinal direction of the container.
  • the first laminate has a shape bent at an acute angle at the boundary, The battery pack according to any one of ⁇ 2> to ⁇ 4>, wherein the first hole is disposed adjacent to a peripheral surface of both the first battery and the second battery.
  • the container has a second laminate including a second resin layer and a second metal layer in this order from the heat absorbing agent side, the second laminate has a second hole penetrating the second resin layer and the second metal layer;
  • the second laminate is a fourth stacked portion along a periphery of the third battery; a fifth stacked portion disposed adjacent to the fourth stacked portion and extending along a peripheral surface of the fourth battery adjacent to the third battery; the second laminate has the second hole at a boundary between the fourth laminate portion and the fifth laminate portion,
  • the second laminate has a shape bent at an acute angle at a boundary between the fourth laminate portion and the fifth laminate portion, The battery pack according to ⁇ 7>, wherein the second hole is disposed adjacent to a peripheral surface of both the third battery and the fourth battery.
  • the first laminate includes a third resin layer on an outer side of the first metal layer to cover the first metal layer, The battery pack according to any one of ⁇ 2> to ⁇ 8>, wherein the first hole also penetrates the third resin layer.
  • the second laminate includes a fourth resin layer on an outer side of the second metal layer to cover the second metal layer, The battery pack according to any one of ⁇ 6> to ⁇ 9>, wherein the second hole also penetrates the fourth resin layer.
  • a first battery a heat absorbing member having a heat absorbing agent and a container for accommodating the heat absorbing agent;
  • the first battery and the container are both flat-plate shaped,
  • the container comprises: a first surface disposed adjacent to the first battery; a second surface facing the first surface with the heat absorbing agent interposed therebetween; and a first through hole penetrating the first surface and the second surface, a periphery of the first through hole is sealed by a peripheral portion of the first surface surrounding the first through hole and a peripheral portion of the second surface surrounding the first through hole.
  • the container comprises: a first laminate having the first surface; a second laminate having the second surface; the first laminate includes a first resin layer and a first metal layer in this order from the heat absorbing agent side, the second laminate includes a second resin layer and a second metal layer in this order from the heat absorbing agent side, the first through hole penetrates both the first stack and the second stack;
  • ⁇ 13> Further comprising a second battery having a flat plate shape; the second surface is disposed adjacent to the second battery, the container further has a second through hole penetrating the first surface and the second surface; a periphery of the second through hole is sealed by a peripheral portion of the first surface surrounding the second through hole and a peripheral portion of the second surface surrounding the second through hole, a portion around the first through hole that is sealed by a peripheral portion of the first surface around the first through hole and a peripheral portion of the second resin layer around the first through hole is provided at a location closer to the first battery than to the second battery;
  • the battery pack described in ⁇ 11> wherein a portion around the second through hole that is sealed by the portion of the first resin layer surrounding the second through hole and the portion of the second resin layer surrounding the second through hole is located closer to the second battery than to the first battery.
  • the container comprises: a first laminate having the first surface; a second laminate having the second surface; the first laminate includes a first resin layer and a first metal layer in this order from the heat absorbing agent side, the second laminate includes a second resin layer and a second metal layer in this order from the heat absorbing agent side, the first through hole penetrates both the first stack and the second stack; the second through hole penetrates both the first stack and the second stack; a portion around the first through hole that is sealed by a portion of the first resin layer surrounding the first through hole and a portion of the second resin layer surrounding the first through hole is provided at a location closer to the first battery than to the second battery;
  • the battery pack described in ⁇ 13> wherein a portion around the second through hole that is sealed by the portion of the first resin layer surrounding the second through hole and the portion of the second resin layer surrounding the second through hole is located closer to the second battery than to the first battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
PCT/JP2024/018768 2023-08-14 2024-05-22 電池パック Pending WO2025037464A1 (ja)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070292751A1 (en) * 2006-06-15 2007-12-20 Jing-Yih Cherng Battery Apparatus with Heat Absorbing Body
WO2010098067A1 (ja) * 2009-02-24 2010-09-02 パナソニック株式会社 電池モジュールとそれを用いた電池モジュール集合体
JP2010287492A (ja) * 2009-06-12 2010-12-24 Mitsubishi Heavy Ind Ltd 二次電池
KR20130024597A (ko) * 2011-08-31 2013-03-08 주식회사 엘지화학 안전성이 향상된 전지 모듈 및 이를 포함하는 전지팩
WO2023132234A1 (ja) * 2022-01-06 2023-07-13 株式会社村田製作所 電池パック

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070292751A1 (en) * 2006-06-15 2007-12-20 Jing-Yih Cherng Battery Apparatus with Heat Absorbing Body
WO2010098067A1 (ja) * 2009-02-24 2010-09-02 パナソニック株式会社 電池モジュールとそれを用いた電池モジュール集合体
JP2010287492A (ja) * 2009-06-12 2010-12-24 Mitsubishi Heavy Ind Ltd 二次電池
KR20130024597A (ko) * 2011-08-31 2013-03-08 주식회사 엘지화학 안전성이 향상된 전지 모듈 및 이를 포함하는 전지팩
WO2023132234A1 (ja) * 2022-01-06 2023-07-13 株式会社村田製作所 電池パック

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