WO2023162908A1 - 電池パック - Google Patents
電池パック Download PDFInfo
- Publication number
- WO2023162908A1 WO2023162908A1 PCT/JP2023/005909 JP2023005909W WO2023162908A1 WO 2023162908 A1 WO2023162908 A1 WO 2023162908A1 JP 2023005909 W JP2023005909 W JP 2023005909W WO 2023162908 A1 WO2023162908 A1 WO 2023162908A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- holder
- battery pack
- cell
- cells
- inner peripheral
- Prior art date
Links
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011231 conductive filler Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
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- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
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- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
-
- 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
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/227—Organic 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
- the present disclosure relates to battery packs.
- Non-aqueous electrolyte secondary batteries such as lithium ion batteries are used in the form of battery packs in which multiple cells (batteries) are electrically connected and housed in a case. If there is an abnormality in a cell in this battery pack and one cell generates abnormal heat, the heat spreads to the surrounding cells via the side of the cell, causing a chain reaction of abnormal heat generation (heat transfer combustion). There is In particular, in battery packs with narrow spaces between adjacent cells, such as ultra-small battery packs, the problem of heat transfer spreading is conspicuous.
- Patent Document 1 describes a battery pack that suppresses heat transferred to adjacent batteries by forming slits in the inner wall side surface of each battery storage portion of a holder that stores a plurality of cells.
- An object of the present disclosure is to provide a battery pack that suppresses the spread of heat transfer to adjacent cells even when heat is generated in the cells.
- a battery pack according to the present disclosure includes a battery block and an exterior case.
- the battery block has a plurality of aligned cells and a holder that faces the longitudinal end faces of the plurality of cells and has an accommodating portion that accommodates the end faces.
- the holder is characterized by having a heat resistance portion that suppresses heat transfer from the holder to the cell end surface.
- the battery pack according to the present disclosure can suppress heat transfer to adjacent cells and spread fire even when heat is generated in the cells.
- FIG. 1 is an external view of a battery pack according to the present disclosure
- FIG. 1 is an external view of a battery block according to the present disclosure
- FIG. FIG. 3 is an exploded view of the battery block of FIG. 2
- FIG. 4 is a cross-sectional view of part of a battery block according to the present disclosure, and is a diagram for explaining how heat is transferred between cells.
- 1 is a partial cross-sectional view of a battery block of an embodiment according to the present disclosure
- FIG. FIG. 4 is a bottom view of the battery block holder of the embodiment according to the present disclosure
- FIG. 4 is a partial cross-sectional view of a battery block of another embodiment according to the present disclosure
- FIG. 4 is a bottom view of a battery block holder according to another embodiment of the present disclosure
- FIG. 4 is a bottom view of a battery block holder according to another embodiment of the present disclosure
- FIG. 1 is an external view of a battery pack according to the present disclosure
- FIG. 1 is an external view of
- FIG. 4 is a partial cross-sectional view of a battery block of still another embodiment according to the present disclosure
- FIG. 11 is a bottom view of a battery block holder according to still another embodiment of the present disclosure
- FIG. 11 is a bottom view of a battery block holder according to still another embodiment of the present disclosure
- FIG. 4 is a partial cross-sectional view of a battery block of still another embodiment according to the present disclosure
- FIG. 11 is a bottom view of a battery block holder according to still another embodiment of the present disclosure
- FIG. 4 is a partial cross-sectional view of a battery block of still another embodiment according to the present disclosure
- FIG. 11 is a bottom view of a battery block holder according to still another embodiment of the present disclosure
- FIG. 4 is a partial cross-sectional view of a battery block of still another embodiment according to the present disclosure
- FIG. 11 is a bottom view of a battery block holder according to still another embodiment of the present disclosure
- FIG. 4 is a partial cross-sectional view
- FIG. 1 is an external view of a battery pack 10 according to the present disclosure.
- the battery pack 10 includes an exterior case 20 made of metal such as aluminum, and one or more battery blocks 30 housed inside the exterior case 20 .
- the exterior case 20 is not limited to being made of metal, and may be made of resin.
- the battery block 30 has a plurality of cells 31 arranged in line, and the plurality of cells 31 are electrically connected to each other.
- the battery block 30 has, for example, a plurality of cells 31 connected in parallel.
- the battery pack 10 is configured such that a plurality of battery blocks 30 are connected in series or in parallel to output a voltage suitable for the device to be used.
- Cell 31 is, for example, a cylindrical battery. In the present disclosure, a cylindrical battery is exemplified as the cell 31, but the battery is not limited to a cylindrical battery, and may be a prismatic battery or the like.
- the cell 31 is a cylindrical battery having a bottomed cylindrical outer can and a sealing member that closes the opening of the outer can.
- An insulating gasket is provided between the outer can and the sealing member.
- the sealing member serves as a positive electrode terminal
- the outer can serves as a negative electrode terminal.
- the sealing member is provided with an exhaust valve for discharging gas when an abnormality occurs in the cell 31 and the internal pressure rises.
- the exhaust valve may be provided at the bottom of the outer can.
- the battery block 30 is composed of a holder 32, a side member 33, a heat insulating member 34, etc., as will be described later.
- the battery pack 10 also includes terminal plates (collector plates) that electrically connect the plurality of battery blocks 30 .
- a positive terminal and a negative terminal of the battery block 30 are connected to the terminal plate, respectively.
- the terminal board may be integrated with the holder 32 .
- An external terminal 40 electrically connected to the battery block 30 is provided at the end of the exterior case 20 .
- the external terminal 40 is used as a terminal for supplying a DC voltage when the battery pack 10 is installed in a device in which it is used.
- the external terminal 40 is also used when charging the battery pack 10 (cell 31).
- the external terminal 40 may be provided only at one end of the battery pack 10, or may be provided at a plurality of locations.
- the side member 33 forming the battery block 30 may also serve as the exterior case 20 .
- FIGS. 2 is an external view of the battery block 30, and FIG. 3 is an exploded view of the battery block 30.
- the longitudinal direction of the battery block 30 is defined as the vertical direction
- the lateral direction in which the cells 31 are aligned is defined as the horizontal direction.
- the battery block 30 has a columnar shape composed of upper and lower holders 32 and side members 33 .
- the shape of the battery block 30 can take various shapes such as a polygonal columnar shape or a cylindrical columnar shape depending on the arrangement of the plurality of cells 31 to be accommodated and the intended use of the battery pack 10 .
- the plurality of cells 31 of the battery block 30 are arranged in parallel, for example.
- the battery block 30 has heat insulating members 34 arranged between adjacent cells 31 of the side member 33 .
- the heat insulating member 34 blocks heat from the cell side surface 31 b and acts as a heat insulating material for preventing heat from being transferred to the adjacent cell 31 .
- the side member 33 covers the entirety of the plurality of cells 31 in the battery block 30 excluding the cell end surfaces 31 a and holds the cells 31 .
- the side member 33 is made of, for example, a highly thermally conductive material containing thermosetting resin and thermally conductive filler and/or endothermic filler.
- the side member 33 is in contact with the cell side surface 31 b and is configured to transmit heat to the side member 33 when abnormal heat generation occurs in the cell 31 .
- the resin forming the side member 33 thermosetting unsaturated polyester, epoxy resin, melamine resin, phenol resin, thermoplastic polycarbonate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, or the like is used.
- thermally conductive filler metal oxides (eg, aluminum oxide, zinc oxide), metal nitrides (eg, aluminum nitride, boron nitride), and metal oxynitrides (eg, aluminum oxynitride) are used.
- the endothermic filler exhibits an endothermic effect during thermal decomposition, and aluminum hydroxide, magnesium hydroxide, and sodium hydrogen carbonate are used, for example.
- the endothermic filler has the effect of reducing heat generation when the cells 31 generate abnormal heat.
- the heat insulating member 34 is arranged between two adjacent cells 31 along the axial direction of the cells 31 .
- the heat insulating member 34 is made of heat insulating material such as heat insulating resin, foamed resin, foamed concrete, gypsum board, glass wool, or silica airgel. Although the heat insulating member 34 is formed in a flat plate shape in FIG.
- the length of the side member 33 and the heat insulating member 34 along the longitudinal direction (axial direction) of the cell 31 is formed smaller than the length of the cell 31 in the axial direction. Therefore, as shown in FIG. 3 , the cell end surfaces 31 a on both axial sides of the cell 31 protrude from the side member 33 .
- the holder 32 is composed of first and second holder members facing both longitudinal end faces of the plurality of cells 31, and is made of, for example, a thermosetting resin.
- the holder 32 is a member for holding the cell end faces 31a projecting upward and downward from the side member 33 from both of the longitudinal directions of the plurality of cells 31, and has a role of maintaining the shape of the battery block 30 together with the side member 33. are doing.
- the holder 32 further has an opening 32a at a position corresponding to the cell end face 31a on the end face of the holder 32, and is also used to connect the cell end face 31a forming the positive electrode terminal or the negative electrode terminal and the external electrode terminal. .
- the opening 32a also serves as a gas discharge path when the cell 31 is abnormal.
- the holder 32 has a housing portion 32b having a shape corresponding to the cell end surface 31a as shown in FIG.
- the housing portion 32b is composed of a bottom surface portion 32c facing the cell end surface 31a and side surface portions along the cell side surface 31b from the bottom surface portion 32c.
- a columnar portion 32d is provided on the surface of the holder 32 opposite to the bottom surface portion 32c. Columnar portion 32d is combined with columnar portion 32d of another battery block 30 and housed in exterior case 20 of battery pack 10 integrally.
- a heat insulating sheet 36 is arranged in a space formed by abutting the columnar portions 32d. The heat insulating sheet 36 is provided so that the gas released from the cell end face 31a of the abnormally heated cell 31 does not hit the other directly facing cell end face 31a, and serves to release the gas in the left-right direction (perpendicular to the axial direction). have.
- the holder 32 has sandwiching portions 32e in which parallel plates protrude between adjacent accommodating portions 32b.
- the sandwiching portion 32e is formed so as to sandwich the heat insulating member 34 in a state in which the holder 32 is brought into contact with the end face of the side member 33 and the cell end face 31a is accommodated.
- the holder 32 is provided with a heat resistance portion that suppresses heat transfer from the holder 32 to the cell end surface 31a.
- the thermal resistance portion in FIG. 3 is composed of a bottom portion 32c and a convex portion 32f.
- the bottom surface portion 32c does not come into contact with the cell end surface 31a of the cell 31, and only the convex portion 32f comes into contact therewith.
- the area of contact between the convex portion 32f and the cell end face 31a is much smaller than the area of the bottom portion 32c.
- An air layer is formed between the bottom surface portion 32c and the cell end surface 31a, and acts as a heat insulating layer. Therefore, the heat transferred from the holder 32 to the cell end surface 31a is suppressed.
- the number of cells 31 in the battery block 30 is not limited to two, and may be three or more. Regarding the arrangement of the plurality of cells 31, it is preferable to arrange them so that the cross-sectional area of the battery block 30 is small, but they may be arranged so as to be arranged in a straight line.
- FIG. 4 is a partial cross-sectional view of the vicinity of the cell end surface 31a of the battery block 30. As shown in FIG. The cell on the left side of FIG. 4 is 31A, and the cell on the right side is 31B. Although FIG. 4 shows only one (upper) cell end surface 31a, the other (lower) cell end surface 31a can have a similar configuration. Further, in FIG. 4, illustration of the internal structure of the cells 31A and 31B is omitted.
- a heat insulating member 34 is arranged between the cells 31A and 31B.
- a side member 33 is arranged on the cell side surface 31b of the cells 31A and 31B where the heat insulating member 34 is not arranged. As shown in FIG. 3, the side member 33 is formed so as to cover the entire side surfaces of the cells 31A and 31B.
- the cells 31A and 31B are entirely covered with metal cans and electrodes, and the cell end faces 31a and the cell side faces 31b are made of metal.
- the cell end surface 31a contacts only the projection 32f provided in the housing portion 32b, and the cell side surface 31b near the cell end surface 31a contacts the side surface portion of the housing portion 32b of the holder 32.
- a heat insulating member 34 is interposed between the cells 31A and 31B on the cell side surface 31b apart from the cell end surface 31a, and the other cell side surface 31b is in contact with the side surface member 33. As shown in FIG.
- the heat transmission path from the cell 31A to the cell 31B includes a path A from the cell side surface 31b through the heat insulating member 34 and a path B that transmits heat from the cell end surface 31a to the holder 32 and from the holder 32 to the cell end surface 31a. do.
- the heat transfer is small because it passes through the heat insulating member 34 . Therefore, the main heat transfer is route B through the holder 32 . If the heat transfer through path B can be reduced, the influence of heat from the abnormal cell can be suppressed, and heat transfer spread can be suppressed.
- a bottom surface portion 32c of the holder 32 facing the cell end surface 31a has an air layer without contacting the cell end surface 31a, and is formed so that only the convex portion 32f is in contact with the cell end surface 31a. Since the air layer acts as a heat insulating layer and the contact area of the projection 32f is small, heat from the holder 32 is hard to be transmitted through the cell end surface 31a. As described above, the holder 32 of the battery block 30 of the present disclosure has a heat resistance portion that suppresses heat transfer from the holder 32 to the cell end surface 31a.
- the holder 32 is made of a thermosetting resin, the holder 32 is prevented from being melted by the heat generated by the abnormal cell and the heat of the ejected gas. It is advantageous for holding the formed heat insulating layer.
- the battery pack 10 of the present disclosure can suppress the influence of heat generated by an abnormal cell and suppress heat transfer spread. Further description will be made below according to embodiments.
- FIG. 5A and 5B show the battery block 30 of the first embodiment.
- FIG. 5A is a partial cross-sectional view of the vicinity of one cell end face 31a of the battery block 30, and has the same structure as the vicinity of the cell end face 31a of the cell 31B in FIG.
- FIG. 5B is a bottom view of the holder 32 viewed from the cell 31 side. Note that the internal structure of the cell 31 is omitted from FIGS. 5A and 5B as well.
- the configuration of the heat resistance portion provided in the holder 32 of the battery block 30 of this embodiment will be described with reference to FIG. 5B.
- the holder 32 has a columnar accommodating portion 32b corresponding to the cross-sectional shape of the cell end surface 31a.
- the housing portion 32b has a bottom portion 32c corresponding to the cell end surface 31a and an opening portion 32a in the center of the bottom portion 32c.
- the holder 32 of this embodiment has a plurality of convex portions 32f that protrude from the bottom surface portion 32c.
- the convex portion 32f of the present embodiment is formed as a cylindrical projection.
- the bottom surface portion 32c does not contact the cell end surface 31a, and an air layer (heat insulating layer) is interposed between the bottom surface portion 32c and the cell end surface 31a. Therefore, the heat from the holder 32 through the bottom surface portion 32c is difficult to be transmitted to the cell end surface 31a through the air layer.
- the diameter of the projection 32f it is possible to suppress heat transfer between the holder 32 and the cell end surface 31a.
- the number of protrusions 32f is not limited to this. In order to suppress heat transfer between the holder 32 and the cell end face 31a, the number of the protrusions 32f is preferably small. However, since the protrusion 32f has a function of supporting the cell end face 31a, it is preferable to have a plurality of protrusions 32f, but one protrusion 32f may be provided.
- the convex portions 32f are evenly distributed in the circumferential direction of the bottom portion 32c. 33 side). By arranging in this way, the heat transfer path (corresponding to the path B in FIG. 4) via the convex portion 32f becomes longer, so that the heat of the adjacent cells 31 is less likely to be transferred.
- the bottom portion 32c and the convex portion 32f form a heat resistance portion from the holder 32 to the cell end surface 31a, thereby preventing heat transfer between the holder 32 and the cell end surface 31a. Since it is suppressed, heat transfer spread can be suppressed.
- FIG. 6A and 6B show the battery block 30 of the second embodiment.
- FIG. 6A is a partial cross-sectional view of the vicinity of one cell end surface 31a of a battery block 30 of the second embodiment
- FIG. 6B is a bottom view of the holder 32 viewed from the cell 31 side.
- Members having the same function as in the first embodiment are denoted by the same reference numerals, and overlapping descriptions are omitted.
- the convex portion 32f of the first embodiment has a columnar shape
- the convex portion 32f of the present embodiment has a spherical crown shape or a hemispherical shape.
- the contact of the projection 32f with the cell end surface 31a of the present embodiment is theoretically a point, and heat transfer can be suppressed more effectively than in the first embodiment.
- the bottom portion 32c and the convex portion 32f form a heat resistance portion from the holder 32 to the cell end surface 31a, suppressing heat transfer between the holder 32 and the cell end surface 31a. can be suppressed.
- FIG. 7A is a partial cross-sectional view of the vicinity of one cell end face 31a of a battery block 30 of the third embodiment
- FIG. 7B is a bottom view of the holder 32 viewed from the cell 31 side.
- FIG. 7C is a bottom view of a variation of holder 32.
- an annular projection 32f is provided on the outer peripheral edge of the bottom surface 32c.
- the outer diameter of the bottom surface portion 32c is formed to be the same as the outer diameter of the cell end surface 31a. formed.
- the convex portion 32f may be divided into a plurality of convex portions 32f as shown in FIG. 7C. The number of projections 32f to be divided is not limited to the illustrated one. According to this embodiment as well, the bottom portion 32c and the convex portion 32f form a heat resistance portion from the holder 32 to the cell end surface 31a, suppressing heat transfer between the holder 32 and the cell end surface 31a. can be suppressed.
- FIG. 8A and 8B show the battery block 30 of the fourth embodiment.
- 8A is a partial cross-sectional view of the vicinity of one cell end face 31a of a battery block 30 of the fourth embodiment
- FIG. 8B is a bottom view of the holder 32 viewed from the cell 31 side.
- the convex portion 32f is formed by radial projections extending in the radial direction of the housing portion 32b.
- the number and positions of the protrusions 32f are not limited to those illustrated.
- the bottom portion 32c and the convex portion 32f form a heat resistance portion from the holder 32 to the cell end surface 31a, suppressing heat transfer between the holder 32 and the cell end surface 31a. can be suppressed.
- 9A and 9B show the battery block 30 of the fifth embodiment.
- 9A is a partial cross-sectional view of the vicinity of one cell end surface 31a of a battery block 30 of the fifth embodiment
- FIG. 9B is a bottom view of the holder 32 viewed from the cell 31 side.
- an annular protrusion is provided on the outer peripheral edge of the bottom surface portion 32c, and a plurality of protrusions extending radially inward from the inner peripheral edge of the annular protrusion are provided.
- the inner diameter of the annular projection is set to be equal to or slightly smaller than the outer diameter of the cell end surface 31a.
- the height of the projection extending radially inward from the bottom surface portion 32c is formed to be lower than the height of the annular projection from the bottom surface portion 32c.
- the contact area between the cell side surface 31b and the holder 32 can also be reduced, so that heat transfer via the cell side surface 31b in the vicinity of the cell end surface 31a can be effectively suppressed.
- the bottom surface portion 32c and the convex portion 32f form the heat resistance portion of the holder 32, which suppresses the heat transfer between the holder 32 and the cell end surface 31a, so that heat transfer spread can be suppressed. .
- 10A and 10B show the battery block 30 of the sixth embodiment.
- 10A is a partial cross-sectional view of the vicinity of one cell end face 31a of a battery block 30 of the sixth embodiment
- FIG. 10B is a bottom view of the holder 32 viewed from the cell 31 side.
- the convex portion 32f is formed of a plurality of stepped projections (three at equal intervals) radially extending from the inner wall side surface of the housing portion 32b in the radial direction of the housing portion 32b.
- the convex portion 32f has a first inner peripheral portion facing the inner wall side surface of the accommodating portion 32b and a second inner peripheral portion radially inside the first inner peripheral portion from the inner wall side surface of the accommodating portion 32b. .
- the inner peripheral diameter of the first inner peripheral portion of the convex portion 32f is formed to be equal to the outer diameter of the cell end face 31a.
- the inner peripheral diameter of the second inner peripheral portion of the convex portion 32f is formed smaller than the outer diameter of the cell end face 31a.
- the height of the second inner peripheral portion of the convex portion 32f from the bottom surface portion 32c is one step lower than the height of the first inner peripheral portion of the convex portion 32f from the bottom surface portion 32c.
- the cell side surface 31b in the vicinity of the cell end surface 31a contacts only the first inner peripheral portion of the convex portion 32f, and an air layer is interposed in areas other than the contact portion of the first inner peripheral portion of the convex portion 32f. . Therefore, heat transfer from the cell side surface 31b to the holder 32 in the vicinity of the cell end surface 31a can be further suppressed.
- the bottom surface portion 32c does not contact the cell end surface 31a, and an air layer (heat insulating layer) is formed between the bottom surface portion 32c and the cell end surface 31a. ) is interposed to prevent heat from being transferred from the holder 32 to the cell end face 31a.
- the contact area between the cell side surface 31b and the holder 32 can also be reduced, so that heat transfer via the cell side surface 31b in the vicinity of the cell end surface 31a can be effectively suppressed.
- the bottom surface portion 32c and the convex portion 32f form the heat resistance portion of the holder 32, which suppresses the heat transfer between the holder 32 and the cell end surface 31a, so that heat transfer spread can be suppressed. .
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Abstract
Description
図5A、図5Bに第1の実施形態の電池ブロック30を示す。図5Aは、電池ブロック30の一方のセル端面31a近傍の一部断面図であり、図4のセル31Bのセル端面31aの近傍と同じ構造である。図5Bは、ホルダー32をセル31側から見た底面図である。尚、図5A、図5Bにおいても、セル31の内部構造は図示を省略している。
図6A、図6Bに第2の実施形態の電池ブロック30を示す。図6Aは、第2の実施形態の電池ブロック30の一方のセル端面31a近傍の一部断面図であり、図6Bは、ホルダー32をセル31側から見た底面図である。第1の実施形態と同様の作用の部材には、同一の符号を付して、重複する記載を省略する。
図7A、図7B、図7Cに第3の実施形態の電池ブロック30を示す。図7Aは、第3の実施形態の電池ブロック30の一方のセル端面31a近傍の一部断面図であり、図7Bは、ホルダー32をセル31側から見た底面図である。図7Cはホルダー32の変形例の底面図である。
図8A、図8Bに第4の実施形態の電池ブロック30を示す。図8Aは、第4の実施形態の電池ブロック30の一方のセル端面31a近傍の一部断面図であり、図8Bは、ホルダー32をセル31側から見た底面図である。
図9A、図9Bに第5の実施形態の電池ブロック30を示す。図9Aは、第5の実施形態の電池ブロック30の一方のセル端面31a近傍の一部断面図であり、図9Bは、ホルダー32をセル31側から見た底面図である。
図10A、図10Bに第6の実施形態の電池ブロック30を示す。図10Aは、第6の実施形態の電池ブロック30の一方のセル端面31a近傍の一部断面図であり、図10Bは、ホルダー32をセル31側から見た底面図である。
Claims (11)
- 電池ブロックと、
外装ケースと、
を備え、
前記電池ブロックは、整列配置された複数のセルと、
前記複数のセルの長手方向の端面と対向し、前記端面を収容する収容部を有するホルダーと、
を有し、
前記ホルダーは、前記ホルダーから前記端面への熱伝達を抑制する熱抵抗部を有する、
電池パック。 - 前記電池ブロックは、前記複数のセルの隣り合うセルの間に設けられる断熱部材と、前記複数のセルの側面を保持する側面部材と、を有する、
請求項1に記載の電池パック。 - 前記ホルダーは、前記複数のセルの長手方向の両方のセル端面とそれぞれ対向する第1及び第2ホルダー部材を有し、
前記第1ホルダー部材及び前記第2ホルダー部材は、それぞれ対向する前記セル端面を収容する収容部を有し、
前記第1ホルダー部材及び前記第2ホルダー部材の少なくとも一方の前記収容部の底面に前記熱抵抗部を有する、
請求項1または2に記載の電池パック。 - 前記熱抵抗部は、前記端面と対向する前記収容部の底面に設けられた凸部を有する、
請求項1~3の何れか一項に記載の電池パック。 - 前記凸部は、円柱状の突起である、
請求項4に記載の電池パック。 - 前記凸部は、球冠状の突起である、
請求項4に記載の電池パック。 - 前記凸部は、前記収容部の底面の外周縁部に設けられた突起である、
請求項4に記載の電池パック。 - 前記凸部は、前記収容部の底面の径方向に設けられた放射状の突起である、
請求項4に記載の電池パック。 - 前記凸部は、前記収容部の底面の外周縁部に設けられた環状の突起と、前記環状の突起から径方向内側に伸びる突起である、
請求項4に記載の電池パック。 - 前記凸部は、前記収容部の内壁側面から前記収容部の径方向に放射状に延びる階段状の複数の突起で形成され、前記収容部の内壁側面に面している第1内周部と前記収容部の内壁側面から前記第1内周部より径方向内側の第2内周部とを有し、
前記第1内周部の内周径は、前記端面の外径と同等に形成され、
前記第2内周部の内周径は、前記端面の外径より小さく構成され、
前記第2内周部の前記収容部の底面からの高さは、前記第1内周部の前記収容部の底面からの高さよりも一段低く形成されている、
請求項4に記載の電池パック。 - 前記ホルダーは、熱硬化樹脂により形成される、
請求項1~10に記載の電池パック。
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Citations (6)
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WO2017175487A1 (ja) * | 2016-04-05 | 2017-10-12 | ソニー株式会社 | 電池パック、及びこれを有する電子機器 |
EP3316342A1 (de) * | 2016-10-25 | 2018-05-02 | Robert Bosch GmbH | Batteriezellhalter zur federelastischen aufnahme mindestens einer batteriezelle, batteriemodulgehäuse und batteriemodul sowie verfahren zur herstellung des batteriemoduls |
JP2018206573A (ja) * | 2017-06-02 | 2018-12-27 | 株式会社オートネットワーク技術研究所 | 蓄電モジュール |
WO2020031467A1 (ja) | 2018-08-06 | 2020-02-13 | 株式会社村田製作所 | 電池ホルダ、電池パック、電子機器及び電動車両 |
WO2021039957A1 (ja) * | 2019-08-30 | 2021-03-04 | パナソニックIpマネジメント株式会社 | 蓄電モジュール |
CN112736348A (zh) * | 2019-10-14 | 2021-04-30 | 罗伯特·博世有限公司 | 具有电池单体和用于容纳电池单体的电池支架的电池模块和用于制造这种电池模块的方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2017175487A1 (ja) * | 2016-04-05 | 2017-10-12 | ソニー株式会社 | 電池パック、及びこれを有する電子機器 |
EP3316342A1 (de) * | 2016-10-25 | 2018-05-02 | Robert Bosch GmbH | Batteriezellhalter zur federelastischen aufnahme mindestens einer batteriezelle, batteriemodulgehäuse und batteriemodul sowie verfahren zur herstellung des batteriemoduls |
JP2018206573A (ja) * | 2017-06-02 | 2018-12-27 | 株式会社オートネットワーク技術研究所 | 蓄電モジュール |
WO2020031467A1 (ja) | 2018-08-06 | 2020-02-13 | 株式会社村田製作所 | 電池ホルダ、電池パック、電子機器及び電動車両 |
WO2021039957A1 (ja) * | 2019-08-30 | 2021-03-04 | パナソニックIpマネジメント株式会社 | 蓄電モジュール |
CN112736348A (zh) * | 2019-10-14 | 2021-04-30 | 罗伯特·博世有限公司 | 具有电池单体和用于容纳电池单体的电池支架的电池模块和用于制造这种电池模块的方法 |
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