WO2019181630A1 - Bloc batterie - Google Patents

Bloc batterie Download PDF

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Publication number
WO2019181630A1
WO2019181630A1 PCT/JP2019/009856 JP2019009856W WO2019181630A1 WO 2019181630 A1 WO2019181630 A1 WO 2019181630A1 JP 2019009856 W JP2019009856 W JP 2019009856W WO 2019181630 A1 WO2019181630 A1 WO 2019181630A1
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WO
WIPO (PCT)
Prior art keywords
battery core
case
pack
battery
core pack
Prior art date
Application number
PCT/JP2019/009856
Other languages
English (en)
Japanese (ja)
Inventor
伊藤慶一
Original Assignee
本田技研工業株式会社
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 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Publication of WO2019181630A1 publication Critical patent/WO2019181630A1/fr

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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
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • 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
    • H01M50/218—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
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • 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

  • Battery packs are detachably mounted on electric vehicles such as electric assist bicycles and electric motorcycles.
  • This type of battery pack is configured by housing a battery core pack having a plurality of single cells inside a hollow case.
  • the single cell is, for example, a lithium secondary battery, and is charged when the capacity is reduced to a certain level. As a result, the capacity is recovered and re-discharge is possible.
  • a battery pack is comprised including the heat radiating member for promoting heat dissipation.
  • an elastic heat conductive sheet as a heat radiating member is interposed between the side surface of the battery core pack and the inner wall of the case (particularly, paragraph [0025] reference).
  • the heat dissipating sheet a sheet that is rich in elasticity and that is sandwiched between the battery core pack and the case and maintains a compressed state is used.
  • the space between the battery core packs is a space, in other words, an air layer.
  • the heat transfer efficiency of the air layer is not good, and it has a heat insulating effect. That is, heat tends to stay in the case. If the heat stays for a long time, the single cell may be deteriorated. Therefore, it is recalled that the heat capacity of the case is increased to promote heat transfer from the battery core pack to the case through the elastic heat conductive sheet. In this case, however, the thickness of the case increases, and as a result, the battery Inconvenience that the weight of the pack becomes large.
  • the main object of the present invention is to provide a battery pack having good heat dissipation despite housing a plurality of battery core packs in a case.
  • Another object of the present invention is to provide a battery pack that can avoid an increase in weight.
  • a battery pack comprising a battery core pack having a plurality of single cells, and a case for accommodating the plurality of battery core packs
  • the case includes an outer frame, and a partition wall that is integrally connected to the outer frame and partitions a hollow interior of the case into a plurality of inner chambers, With the partition, the inner chamber is formed in the same number as the number of the battery core packs, A battery pack is provided in which the individual battery core packs are accommodated in the individual inner chambers.
  • the partition wall is integrally connected to the outer frame (in other words, the case is made of a single member), the number of parts of the case and, consequently, the battery core pack increases, and the number of battery core pack assembly processes. Is increased. Therefore, it is possible to configure a battery pack that has good heat dissipation and can avoid an increase in weight while reducing costs.
  • heat dissipation member between the battery core pack and the inner wall of the inner chamber.
  • heat transfer from the battery core pack to the case proceeds via the heat dissipation sheet, so that heat dissipation is further improved.
  • the case is preferably composed of an extruded material of aluminum or aluminum alloy. In this case, an excellent strength and lightweight case can be obtained at low cost.
  • the battery core pack is accommodated in the inner chamber so that the case extruding direction is orthogonal to the longitudinal direction of the single cell.
  • the electrode terminals of the single cell are provided on the bottom surface, which is the longitudinal end of the single cell, and the electrode terminals are electrically connected to each other through a bus bar. Therefore, according to the above-described positional relationship, the distance between the electrode terminal as the heating element and the bus bar as the heat conductor and the case is reduced. That is, since the heat transfer distance is shortened, the heat transfer efficiency is improved.
  • the partition is provided in the case, the hollow interior is partitioned into the same number of inner chambers as the battery core pack, and the battery core pack is individually accommodated in each inner chamber. , Interposed between adjacent battery core packs. For this reason, the heat of the battery core pack is quickly transferred to the outer frame via the partition wall, and further dissipated from the outer frame to the outside air.
  • the partition wall is integrally formed with the outer frame, it is possible to avoid an increase in the number of parts of the battery core pack and an increase in the number of assembly steps of the battery core pack.
  • FIG. 1 is a schematic overall perspective view of a battery pack according to an embodiment of the present invention.
  • FIG. 2 is a schematic exploded perspective view of the battery pack of FIG. 1. It is sectional drawing of the direction orthogonal to a longitudinal direction of the battery pack of FIG. It is sectional drawing of the direction orthogonal to a longitudinal direction of a battery pack provided with the case in which the hollow part was formed.
  • the battery pack 10a includes a hollow quadrangular prism-shaped case 12a that is open at both ends, and a first battery core pack 14 and a second battery core pack 16 that are accommodated inside the hollow of the case 12a.
  • the opening on the bottom side of the case 12 a is closed by the bottom case 18, and the opening on the ceiling side is closed by the top case 20.
  • the bottom case 18 is provided with a connector 22 for charging and discharging the first battery core pack 14 and the second battery core pack 16.
  • the top case 20 is formed with an arch shape with a handle 24 for gripping the user when lifting or transporting the battery pack 10a.
  • the first battery core pack 14 is configured by holding a plurality of single cells 30 in a first cell holder 32.
  • the single cell 30 has a cylindrical shape, and is provided with a positive electrode terminal and a negative electrode terminal (both not shown) at both ends in the axial direction.
  • a lithium ion secondary battery is mentioned as a suitable example of the single cell 30, it is not specifically limited to this, Other secondary batteries, such as a nickel metal hydride battery and a nickel cadmium battery, may be sufficient.
  • the first cell holder 32 is formed with a plurality of receiving holes 34 penetrating with a diameter and length corresponding to the diameter and height of the single cell 30.
  • the single cell 30 is inserted into each receiving hole 34 individually. Is held.
  • the second battery core pack 16 has a second cell holder 36 in which a housing hole 34 is formed, and is configured by holding the single cell 30 in the housing hole 34.
  • the first battery core pack 14 and the second battery core pack 16 are accommodated in the case 12a so that the single cell 30 is in a posture in which the longitudinal direction is orthogonal to the vertical direction of the battery pack 10a.
  • a positive electrode terminal and a negative electrode terminal are respectively provided on both bottom surfaces which are end surfaces in the longitudinal direction.
  • the accommodation holes 34 are juxtaposed along the lateral direction of the first cell holder 32 and the second cell holder 36 (vertical direction in FIG. 2).
  • a single row formed by the accommodation holes 34 arranged in the horizontal direction is referred to as an “accommodation hole row”
  • the reference numeral 37 is a single cell 30 in an arbitrary accommodation hole row 37 of the first battery core pack 14.
  • the positive terminal is accommodated in the accommodation hole 34 so as to face the second battery core pack 16.
  • the single cell 30 is housed in the accommodation hole 34 so that the negative electrode terminal faces the second battery core pack 16. Since this alternate arrangement is repeated, in the adjacent accommodation hole row 37, the opposite polarity electrode terminals face the same direction.
  • the bus bar 38 that connects the single cell 30 in the lowermost accommodation hole row 37 of the first battery core pack 14 and the single cell 30 in the lowermost accommodation hole row 37 of the second battery core pack 16 has a bottom case.
  • the portion facing 18 is curved and protrudes from the clearance between the first battery core pack 14 and the second battery core pack 16.
  • the case 12 a that accommodates the first battery core pack 14 and the second battery core pack 16 includes an outer frame 40 and a partition wall 42 that is integrally connected to the outer frame 40.
  • the partition wall 42 extends along the vertical direction of the case 12a, and divides the hollow interior of the case 12a into a first inner chamber 44 and a second inner chamber 46 having substantially the same volume.
  • Such a case 12a is produced, for example, by performing extrusion molding on a material made of aluminum or an aluminum alloy.
  • the case 12a is excellent in strength, light in weight, and high in heat conductivity, and thus excellent in heat transfer efficiency. And since it is cheap, the case 12a can be obtained at low cost.
  • the first battery core pack 14 is accommodated in the first inner chamber 44
  • the second battery core pack 16 is accommodated in the second inner chamber 46. That is, in the present embodiment, the hollow interior of the case 12a is partitioned into the same number of inner chambers as the number of battery core packs by the partition walls 42, and each battery core pack (the first battery core pack 14 and the second battery core pack 14). The battery core pack 16) is individually accommodated in each inner chamber (the first inner chamber 44 and the second inner chamber 46).
  • the extrusion direction at the time of extrusion molding is the extending direction of the partition wall 42. That is, in the present embodiment, the first battery core pack 14 and the second battery core pack 16 have the first inner chamber 44 and the second inner core 44 such that the pushing direction of the case 12a is orthogonal to the longitudinal direction of the single cell 30. It is accommodated in the chamber 46.
  • a heat radiating sheet 50 as a heat radiating member is interposed between both side surfaces of the first battery core pack 14, that is, between the bus bar 38 and both inner walls of the first inner chamber 44 facing the bus bar 38.
  • the heat radiation sheet 50 is provided between the bus bar 38 attached to both side surfaces of the second battery core pack 16 and the inner walls (the outer frame 40 and the partition wall 42) of the second inner chamber 46 facing the bus bar 38, respectively. Is inserted.
  • the heat radiation sheet 50 is rich in elasticity and can maintain a compressed state between the first battery core pack 14 or the second battery core pack 16 and the inner wall of the first inner chamber 44 or the second inner chamber 46. Is preferably selected. In this case, the heat dissipation sheet 50 is in close contact with the first battery core pack 14 or the second battery core pack 16 and the inner wall of the first inner chamber 44 or the second inner chamber 46 in a wide area.
  • a battery management unit 52 which is a control unit for managing the temperature and voltage of 16 is inserted.
  • the BMU 52 also serves as a communication unit that performs communication with the electric vehicle and the charging device.
  • the battery pack 10a according to the present embodiment is basically configured as described above. Next, the function and effect will be described.
  • the user may hold the handle 24, transport the battery pack 10a to the charging device, and electrically connect the connector 22 and the charging terminal of the charging device. As a result, each single cell 30 in the case 12a is charged.
  • the display of the indicator provided in the charging device is changed, so that the user can recognize “charging completed”.
  • the user grips the handle 24 to detach the battery pack 10a from the charging device, and mounts the battery pack 10a on the electric vehicle, for example.
  • the connector 22 is electrically connected to the power extraction terminal, and power is supplied from each single cell 30 to the electric vehicle. In other words, each single cell 30 is discharged.
  • each single cell 30 In the above charging and discharging process, a predetermined oxidation reaction or reduction reaction is caused on the positive electrode or the negative electrode of each single cell 30. Along with this, each single cell 30 generates heat. The heat is transferred to the first cell holder 32, the second cell holder 36, and the bus bar 38, whereby the first battery core pack 14 and the second battery core pack 16 are heated.
  • both side surfaces of the first battery core pack 14 and the second battery core pack 16 and the inner walls of the first inner chamber 44 or the second inner chamber 46 The heat dissipation sheet 50 is interposed between the two. For this reason, as shown in FIG. 3, the heat of the first battery core pack 14 and the second battery core pack 16 is transferred directly to the outer frame 40 via the heat dissipation sheet 50 or indirectly via the partition wall 42. It is.
  • case 12a consists of a single member. Since the case 12a can be manufactured by extrusion molding or the like, the number of parts of the battery pack 10a is not increased, and the number of assembly steps is not increased.
  • the first battery core pack 14 and the second battery core pack 16 are arranged so that the positive electrode terminal and the negative electrode terminal provided on each bottom surface of the single cell 30 are in a direction orthogonal to the pushing direction of the case 12a. Is accommodated in the case 12a. For this reason, the positive electrode terminal and the negative electrode terminal which are heating elements and the bus bar 38 which is a heat conductor are close to the outer frame 40 or the partition wall 42. That is, the distance between the electrode terminal and the inner wall of the case 12a is reduced. For this reason, since the heat transfer distance is shortened, the heat transfer efficiency is improved.
  • the heat dissipation sheet 50 functions as a wedge, it is difficult for the first battery core pack 14 and the second battery core pack 16 to fall off from the first inner chamber 44 and the second inner chamber 46. That is, it becomes easy to stop the first battery core pack 14 and the second battery core pack 16 at desired positions in the case 12a.
  • the battery pack 10b may be configured.
  • the case 12b having such a shape can be produced by performing extrusion molding on a material made of an aluminum alloy, similarly to the case 12a described above.
  • the heat of the first battery core pack 14 and the second battery core pack 16 is directly applied to the outer frame 40 or indirectly via the partition wall 42, similarly to the battery pack 10a. Heat is transferred.
  • the hollow portion 60 performs a heat insulating action, the entire surface area of the case 12b is increased by the hollow portion 60 and the area in contact with the atmosphere is increased. Therefore, the heat transfer efficiency between the case 12b and the atmosphere, that is, the heat dissipation effect is high. Become.
  • the present invention is not particularly limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

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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)
  • Aviation & Aerospace Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne un bloc-batterie (10a) pourvu d'un boîtier (12a) dans lequel est contenue une pluralité de blocs-piles (14, 16). Le boîtier (12a) comprend un cadre externe (40) et une paroi de séparation (42) qui est continue d'un seul tenant avec le cadre externe (40) et définit un intérieur creux du boîtier (12a) en une pluralité de compartiments internes (44, 46). La pluralité de blocs-piles (14, 16) sont contenus séparément dans la pluralité de compartiments internes (44, 46).
PCT/JP2019/009856 2018-03-23 2019-03-12 Bloc batterie WO2019181630A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018055947A JP2019169337A (ja) 2018-03-23 2018-03-23 バッテリパック
JP2018-055947 2018-03-23

Publications (1)

Publication Number Publication Date
WO2019181630A1 true WO2019181630A1 (fr) 2019-09-26

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ID=67987187

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/009856 WO2019181630A1 (fr) 2018-03-23 2019-03-12 Bloc batterie

Country Status (2)

Country Link
JP (1) JP2019169337A (fr)
WO (1) WO2019181630A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6790176B1 (ja) * 2019-06-04 2020-11-25 本田技研工業株式会社 バッテリパック
KR20210112639A (ko) * 2020-03-05 2021-09-15 주식회사 엘지에너지솔루션 이동 및 조립이 편의성이 증대된 구조 및 안전성이 향상된 구조를 갖는 배터리 팩
KR20240020076A (ko) * 2022-08-05 2024-02-14 주식회사 엘지에너지솔루션 배터리 팩

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010140695A (ja) * 2008-12-10 2010-06-24 Panasonic Corp 電池モジュールとそれを用いた集合電池モジュール
WO2016179557A1 (fr) * 2015-05-06 2016-11-10 A123 Systems Llc Système de protection contre un écrasement de batterie
JP2017504149A (ja) * 2014-11-10 2017-02-02 エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ バッテリー及びその熱管理装置、並びにこのバッテリーを有するｕａｖ
JP2017041378A (ja) * 2015-08-20 2017-02-23 株式会社東芝 電池モジュール
WO2017104942A1 (fr) * 2015-12-18 2017-06-22 주식회사 엘지화학 Module de batterie, bloc-batterie comprenant ce module de batterie, et véhicule comprenant ce bloc-batterie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010140695A (ja) * 2008-12-10 2010-06-24 Panasonic Corp 電池モジュールとそれを用いた集合電池モジュール
JP2017504149A (ja) * 2014-11-10 2017-02-02 エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ バッテリー及びその熱管理装置、並びにこのバッテリーを有するｕａｖ
WO2016179557A1 (fr) * 2015-05-06 2016-11-10 A123 Systems Llc Système de protection contre un écrasement de batterie
JP2017041378A (ja) * 2015-08-20 2017-02-23 株式会社東芝 電池モジュール
WO2017104942A1 (fr) * 2015-12-18 2017-06-22 주식회사 엘지화학 Module de batterie, bloc-batterie comprenant ce module de batterie, et véhicule comprenant ce bloc-batterie

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