WO2019065278A1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
WO2019065278A1
WO2019065278A1 PCT/JP2018/034039 JP2018034039W WO2019065278A1 WO 2019065278 A1 WO2019065278 A1 WO 2019065278A1 JP 2018034039 W JP2018034039 W JP 2018034039W WO 2019065278 A1 WO2019065278 A1 WO 2019065278A1
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WO
WIPO (PCT)
Prior art keywords
case
battery
sheet
pack
battery core
Prior art date
Application number
PCT/JP2018/034039
Other languages
French (fr)
Japanese (ja)
Inventor
松元隆志
藤井徳明
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 WO2019065278A1 publication Critical patent/WO2019065278A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—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
    • 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
    • H01M50/218—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 invention relates to a battery pack including a battery core pack having a plurality of battery cells held in a cell holder, and a case for housing the battery core pack.
  • a core pack and a case for housing the battery core pack are provided with a rectangular cylindrical outer shell case covering the side of the battery core pack, and one of the openings provided at both ends in the height direction of the outer shell case serves as a storage port for the battery core pack with respect to the case.
  • the battery core pack having the heat dissipation sheet provided on the side surface is inserted into the case from the housing port.
  • the thermal radiation sheet will peel from the side of a battery core pack, or will be deformed by the friction etc. which arise between each other.
  • the heat dissipation sheet can not be favorably interposed between the battery core pack and the case, and there is a concern that it is difficult to enhance the heat dissipation of the battery pack.
  • the case or battery core When housing the battery core pack in the case, in order to avoid contact between the case and the heat dissipation sheet, the case or battery core should be sufficiently separated from the inner surface of the case and the side surface of the battery core pack. It is conceivable to set the dimensions of the pack or the like. However, in this case, since the separation distance between the case and the heat dissipation sheet becomes large, it becomes difficult to sufficiently improve the heat dissipation of the battery pack.
  • the main object of the present invention is to provide a battery pack in which a heat dissipating sheet can be favorably interposed between a case and a battery core pack to effectively improve the heat dissipation.
  • a friction reducing sheet having a smaller frictional force (hereinafter, also simply referred to as a frictional force) generated with the inner surface of the case than the heat dissipation sheet intervenes between the heat dissipation sheet and the inner surface of the case.
  • a frictional force generated with the inner surface of the case than the heat dissipation sheet intervenes between the heat dissipation sheet and the inner surface of the case.
  • the heat dissipation sheet in order to interpose the heat dissipation sheet between the case and the side surface of the battery core pack, when the heat dissipation sheet is provided on the side surface of the battery core pack and housed in the case, the heat dissipation sheet is covered by the friction reduction sheet. be able to.
  • the friction reducing sheet has a small frictional force, and is less susceptible to deformation or peeling even when in contact with the inner surface of the case. Therefore, by sliding the friction reducing sheet and the inner surface of the case, the battery core pack is accommodated in the case while suppressing the peeling and deformation of the heat dissipating sheet from the side surface of the battery core pack. Can.
  • the case has an outer shell case covering a side surface of the battery core pack, and a closing case covering an opening of the outer shell case serving as an accommodation port of the battery core pack to the case.
  • the heat dissipating sheet is preferably accommodated in the case in a state compressed in the thickness direction between the friction reducing sheet facing the inner surface of the outer shell case and the side surface of the battery core pack.
  • the heat of the battery cell can be efficiently conducted to the case through the heat dissipation sheet, so the heat dissipation of the battery pack can be further improved. be able to.
  • FIG. 1 is a schematic perspective view of a battery pack according to an embodiment of the present invention. It is a disassembled perspective view with a friction reduction sheet
  • FIG. 1 is a schematic perspective view of a battery pack 10 according to the present embodiment.
  • the outer shell case 12 is indicated by a two-dot chain line, and components disposed inside the outer shell case 12 are illustrated.
  • the battery pack 10 can be suitably applied as, for example, a portable battery pack 10 that is removably mounted on an electrically powered vehicle (not shown) such as an electrically assisted bicycle or an electrically driven motorcycle. Therefore, although an example in which battery pack 10 is mounted on an electric vehicle will be described below, the present invention is not particularly limited to this, and battery pack 10 can be applied to various devices that require electric power. . Further, the vertical direction of the battery pack 10 is based on the vertical direction (arrows X1 and X2 in FIG. 1) when the battery pack 10 is mounted on the electric vehicle.
  • the battery pack 10 includes a case 14, a connector 18 in which two battery core packs 16 a and 16 b are connected, a heat dissipation sheet 20, a friction reduction sheet 22, and a battery management device (Battery Management) Unit: BMU 24 mainly includes a connector unit (not shown).
  • the case 14 can be formed of, for example, a metal such as aluminum, a resin (including a fiber reinforced resin), or the like.
  • the case 14 is a bottom case 26 covering the bottom of the connector 18, an outer shell case 12 attached to the upper end of the bottom case 26 and covering the side of the connector 18, and an upper end of the outer shell 12.
  • a top case 28 that covers the top surface of the connector 18.
  • the bottom case 26 is a housing having an opening at its upper end, and a connector portion and the like are accommodated inside.
  • the connector portion is exposed to the outside of the case 14 through a notch or the like formed on the bottom wall of the bottom case 26, and is used as a power supply port of the electric vehicle or a charging device for charging the connector 18. It is possible to connect to.
  • said notch, an electric power supply port, and a charging device are all not shown.
  • the outer shell case 12 is provided with openings at both end portions in the vertical direction. A part of the upper end side of the bottom case 26 is inserted into the opening on the lower end side of the outer shell case 12.
  • a lower fixing groove 30 is formed along the circumferential direction of the outer shell case 12 on the inner wall of the outer shell case 12 above the upper end of the bottom case 26 inserted into the outer shell case 12.
  • the lower battery core pack frame 32 supporting the connector 18 from the lower side is fixed to the lower fixing groove 30.
  • the bottom of the bottom case 26 is provided with a protrusion projecting toward the lower battery core pack frame 32, and the protrusion and the lower battery core pack frame 32 are fixed by bolts or the like. ing.
  • a part of the lower end side of the top case 28 is inserted into the opening on the upper end side of the outer shell case 12.
  • An upper fixing groove 34 is formed on the inner wall of the outer shell case 12 below the lower end of the top case 28 inserted in the outer shell case 12, and the upper fixing groove 34 abuts on the upper end surface of the connector 18.
  • Upper battery core pack frame 36 is fixed.
  • a connecting body 18 is held between the upper battery core pack frame 36 and the lower battery core pack frame 32.
  • the top case 28 is a housing having an opening at its lower end, and the upper end face is provided with a handle portion 38 that can be gripped when carrying the battery pack 10.
  • the top case 28 and the upper battery core pack frame 36 are also fixed by bolts (not shown) or the like, similarly to the bottom case 26 and the lower battery core pack frame 32.
  • the two battery core packs 16a, 16b constituting the coupling body 18 are configured substantially the same as each other. Therefore, components corresponding to each other of the two battery core packs 16a and 16b will be described in common by attaching the same reference numerals.
  • the two battery core packs 16 a and 16 b are not distinguished from one another, they are also collectively referred to as a battery core pack 16.
  • the battery core pack 16 has a plurality of battery cells 40 (see FIG. 3) and a cell holder 42. As shown in FIG. 1, in the present embodiment, the battery core pack 16 is configured to have a space 43 (see FIG. 1) for accommodating wiring (not shown) or the like between the battery core pack 16 and the connector portion. The lower end is partially cut away.
  • the battery cell 40 has, for example, a cylindrical shape, and the positive electrode terminal 44 and the negative electrode terminal 46 are respectively provided at both ends in the axial direction.
  • a lithium ion secondary battery can be mentioned as a suitable type of the battery cell 40, it is not particularly limited to this, and for example, a secondary battery such as a nickel hydrogen battery or a nickel cadmium battery may be used.
  • the cell holder 42 is configured by combining the positive electrode side holder 42a and the negative electrode side holder 42b, and holds the holding portion 50 for holding the plurality of battery cells 40, the pressing plate portion 53 provided with the exposed portion 52, the holding portion 50 and the pressing portion And a peripheral wall 54 surrounding the plate 53.
  • the positive electrode terminal 44 is exposed from the exposed portion 52 of the positive electrode side holder 42a, and the negative electrode terminal 46 is exposed from the exposed portion 52 of the negative electrode side holder 42b.
  • the above-mentioned vertical direction hereinafter also referred to as X direction
  • the axial direction of the battery cell 40 arrow Y1 and Y2 directions in FIG. 2; hereinafter also referred to as Y direction
  • Z direction A direction perpendicular to both the axial direction and the axial direction (directions of arrows Z1 and Z2 in FIG. 2, hereinafter also referred to as Z direction) will be described as a reference.
  • the holding portion 50 has a plurality of insertion holes 56, and holds the battery cells 40 in a state of being respectively inserted into the insertion holes 56.
  • the insertion holes 56 extend along the Y direction, and expose the positive electrode terminal 44 or the negative electrode terminal 46 of the battery cell 40 from the openings at both ends in the extending direction.
  • the diameter of the insertion hole 56 is a size corresponding to the outer diameter of the battery cell 40.
  • the respective positive electrode terminals 44 are disposed flush with one another, and the respective negative electrodes 46 are disposed flush with one another.
  • a potting material (not shown) made of an insulating resin or the like may be filled between the circumferential surfaces of the plurality of battery cells 40 held by the holding unit 50.
  • the holding plate portions 53 are respectively provided on both ends of the holding portion 50 in the Y direction, and through holes are formed as exposed portions 52 at positions corresponding to the openings of the insertion holes 56.
  • the positive electrode terminal 44 and the negative electrode terminal 46 (hereinafter, also collectively referred to as electrode terminals) are exposed to the outside of the cell holder 42 through the opening of the insertion hole 56 and the exposed portion 52.
  • a plurality of bus bar plates 60 (see FIG. 2) are attached to the pressing plate 53 so as to cover the exposed portion 52 exposing the positive electrode terminal 44 and the exposed portion 52 exposing the negative electrode terminal 46.
  • the holding plate portion 53 is provided with protruding portions 62 interposed between the bus bar plates 60 to insulate them from each other.
  • the two battery core packs 16a and 16b are connected so that the negative electrode terminal 46 side of one battery core pack 16a and the positive electrode terminal 44 side of the other battery core pack 16b are opposed to each other to form a connected body 18 It is done.
  • the side of the positive electrode terminal 44 of one battery core pack 16a and the side of the negative electrode terminal 46 of the other battery core pack 16b in other words, the side surfaces on both sides in the Y direction of the connector 18 (hereinafter, also simply referred to as side surfaces) Face the inner side of the case 12
  • each of the plurality of bus bar plates 60 connects the positive electrode terminals 44 or the negative electrodes 46 in parallel by a predetermined number, and enters the exposed portion 52 to be in contact with the electrode terminals
  • the protruding portion 64 is provided, for example, by embossing.
  • Connection end portions 68 to be inserted into grooves 66 provided on the end surfaces of the peripheral wall portion 54 are provided on the bus bar plate 60, respectively.
  • a plurality of bus bar plates 60 are connected to the connector portion via the BMU 24 in a state of being connected in series with each other by connecting the connection end portion 68 and the above-described lead wires and the like.
  • the heat dissipation sheet 20 and the friction reducing sheet 22 are accommodated between the side surface of the coupling body 18 and the inner surface of the outer shell case 12. Specifically, friction reduction sheet 22 is disposed to face the inner surface of outer shell case 12, and heat dissipation sheet 20 is compressed in the thickness direction between friction reduction sheet 22 and the side surface of connector 18. Arranged in the state.
  • the heat dissipation sheet 20 is made of, for example, an elastic material or the like capable of promoting the heat dissipation of the battery cell 40 such as silicon resin, and covers the entire bus bar plate 60 (exposed portion 52).
  • the friction reducing sheet 22 is made of, for example, a polyimide film, a polytetrafluoroethylene film, a polypropylene film, a polyethylene terephthalate film or the like, and the friction force generated between it and the inner surface of the outer shell case 12 (hereinafter also referred to simply as the friction force) Is smaller than the heat radiation sheet 20.
  • the area of the friction reducing sheet 22 is preferably larger than the area of the heat dissipation sheet 20.
  • the upper end portion of one end side (the arrow Y2 side in FIG. 1) of the positive electrode side holder 42a of the battery core pack 16a and the other end side (the arrow Y1 side in FIG. 1) of the negative side holder 42b of the battery core pack 16b The projecting wall 70 which protrudes toward upper side is each provided in the upper end part of.
  • the upper battery core pack frame 36 abuts on the upper end surface of the projecting wall 70.
  • a space 72 is formed between the connector 18 and the upper battery core pack frame 36, and the BMU 24 is disposed in the space 72 (see FIG. 1).
  • the BMU 24 controls the charge and discharge of the battery core pack 16, the communication unit that communicates with the electric vehicle and the charging device, and the state of the battery core pack 16 detected from the temperature and voltage of the battery cells 40.
  • a storage unit for storing (all not shown).
  • the battery pack 10 according to the present embodiment is basically configured as described above.
  • the battery cell 40 can be charged by holding the handle portion 38, carrying the battery pack 10 in the vicinity of the charging device, and connecting the connector portion and the charging device.
  • the battery cell 10 can be discharged by mounting the battery pack 10 gripped and carried by the handle portion 38 on the electric vehicle and connecting the connector portion and the power supply port.
  • This manufacturing method includes an accommodating step of accommodating the heat dissipation sheet 20 and the friction reducing sheet 22 together with the connecting body 18 in the outer shell case 12.
  • an accommodating step of accommodating the heat dissipation sheet 20 and the friction reducing sheet 22 together with the connecting body 18 in the outer shell case 12.
  • etc. From the upper opening of outer shell case 12 is demonstrated. That is, the upper opening of the outer shell case 12 serves as an accommodation port for the connector 18, and the top case 28 covering the upper opening of the outer shell case 12 serves as a closed case.
  • the present invention is not particularly limited to this, and in the storing step, the connector 18 or the like may be inserted from the lower opening of the outer shell case 12.
  • the lower opening of the outer shell case 12 serves as an accommodation port for the connecting member 18, and the bottom case 26 covering the lower opening of the outer shell case 12 serves as a closed case.
  • the heat dissipation sheet 20 is provided on the side surface of the connecting member 18.
  • the heat dissipating sheet 20 may be provided on the side surface of the connecting body 18 by any method, but for example, the heat dissipating sheet 20 may be attached to the side surface of the connecting body 18 by using the adhesiveness of the heat dissipating sheet 20 It is possible.
  • a friction reducing sheet 22 is provided to cover the heat dissipation sheet 20 provided on the side surface of the connector 18.
  • the friction reduction sheet 22 can also be attached to the heat dissipation sheet 20 by utilizing the adhesiveness of the heat dissipation sheet 20.
  • thermally conductive grease may be applied to one surface of the friction reducing sheet 22 and attached to the heat dissipation sheet 20.
  • a pressing jig 74 is attached to the connector 18 so as to cover the bottom of the connector 18 including the lower end side of the friction reducing sheet 22.
  • the heat sink sheet 20 and the friction reduction sheet 22 are accommodated in the outer shell case 12 together with the connector 18. be able to.
  • the distance between the inner surface of the outer shell case 12 and the side surface of the connector 18 is set to be slightly smaller than the total thickness of the heat dissipating sheet 20 and the friction reducing sheet 22. For this reason, the heat dissipation sheet 20 accommodated between the outer shell case 12 and the side surface of the connecting member 18 as described above is compressed in the thickness direction.
  • the lower opening of the outer shell case 12 has one end on the upper end side of the bottom case 26.
  • the lower battery core pack frame 32 and the bottom case 26 are fixed by inserting a part.
  • a part of the lower end side of the top case 28 is inserted into the upper opening of the outer case 12 to fix the upper battery core pack frame 36 and the top case 28.
  • the battery pack 10 can be obtained.
  • the battery pack 10 can be obtained without the inner surface of the case 14 and the heat dissipation sheet 20 being in direct contact with each other. That is, when the heat dissipating sheet 20 is provided on the side surface of the connecting body 18 so as to interpose the heat dissipating sheet 20 between the outer shell case 12 and the side surface of the connecting body 18, the heat dissipating sheet 20 is It can be in the state of being covered by the friction reducing sheet 22.
  • the friction reducing sheet 22 has a small frictional force as described above, and is unlikely to be deformed or peeled off even when in contact with the inner surface of the outer shell case 12.
  • the distance between the side surface of the connector 18 and the inner surface of the outer shell case 12 is set so that the heat dissipating sheet 20 is in close contact with both the side surface of the connector 18 (bus bar plate 60) and the inner surface of the outer shell case 12
  • the heat dissipating sheet 20 can be favorably interposed between each other. That is, the heat dissipation sheet 20 can be favorably accommodated in the outer shell case 12 in a state of being compressed in the thickness direction between the friction reduction sheet 22 and the side surface of the connecting member 18.
  • the heat of the battery cell 40 can be efficiently conducted to the outer shell case 12 through the heat dissipation sheet 20, so it is easy to effectively improve the heat dissipation of the battery pack 10 is there.
  • the connecting body 18 in which the two battery core packs 16a and 16b are connected is provided.
  • the battery pack 10 may include only one battery core pack, or may include a connector (not shown) in which three or more battery core packs are connected.
  • the heat dissipating sheet 20 and the friction reducing sheet 22 may be accommodated between at least one of the side surfaces of the connector 18 and the inner surface of the case 14.
  • the heat dissipating sheet 20 and the friction reducing sheet 22 may be accommodated, for example, between the side surfaces on both sides in the Z direction and the inner surface of the outer shell case 12.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

A battery pack (10) includes a battery core pack (16) having a plurality of battery cells (40) held by a cell holder (42), and a case (14) accommodating the battery core pack (16). A heat radiation sheet (20) for dissipating the heat of the battery cells (40) and a friction reducing sheet (22) are accommodated between the side surface of the battery core pack (16) and the case (14), the frictional force generated between the friction reducing sheet (22) and the inner surface of the case (14) being less than the frictional force generated between the heat radiation sheet (20) and the inner surface of the case (14). The friction reducing sheet (22) is interposed between the heat radiation sheet (20) and the inner surface of the case (14).

Description

バッテリパックBattery pack
　本発明は、セルホルダに保持された複数の電池セルを有するバッテリコアパックと、バッテリコアパックを収容するケースとを備えるバッテリパックに関する。 The present invention relates to a battery pack including a battery core pack having a plurality of battery cells held in a cell holder, and a case for housing the battery core pack.
　例えば、特表２０１６－５３４５１８号公報に記載されるように、電動アシスト自転車や、電動バイク等の電動車両に着脱可能に搭載されるバッテリパックとして、セルホルダに保持された複数の電池セルを有するバッテリコアパックと、該バッテリコアパックを収容するケースとを備えるものが知られている。ケースは、バッテリコアパックの側面を覆う角筒状の外殻ケースを備え、該外殻ケースの高さ方向の両端に設けられた開口の一方が、ケースに対するバッテリコアパックの収容口となる。 For example, as described in JP-A-2016-534518, a battery having a plurality of battery cells held in a cell holder as a battery pack removably mounted on a motor-assisted bicycle or a motor-driven vehicle such as a motor-driven bike. It is known to provide a core pack and a case for housing the battery core pack. The case is provided with a rectangular cylindrical outer shell case covering the side of the battery core pack, and one of the openings provided at both ends in the height direction of the outer shell case serves as a storage port for the battery core pack with respect to the case.
　この種のバッテリパックにおいて、電池セルの放熱を促すためには、バッテリコアパックの側面とケース（外殻ケース）との間に放熱シートを介在させることが考えられる。この際、バッテリコアパックの側面とケースの内面との両方に密着するように放熱シートを設けることにより、電池セルの熱を、放熱シートを介してケースへと効率的に伝導させて、バッテリパックの放熱性を高めることが可能になる。 In this type of battery pack, in order to promote heat dissipation of the battery cells, it is conceivable to interpose a heat dissipation sheet between the side surface of the battery core pack and the case (outer shell case). At this time, by providing a heat dissipation sheet so as to be in close contact with both the side surface of the battery core pack and the inner surface of the case, the heat of the battery cell can be efficiently conducted to the case via the heat dissipation sheet. It is possible to improve the heat dissipation of the
　ところで、上記のバッテリパックにおいて、バッテリコアパックの側面とケースとの間に放熱シートを介在させるためには、放熱シートを側面に設けたバッテリコアパックを、収容口からケース内に挿入していく必要がある。この際、ケースと放熱シートとが接触すると、互いの間に生じる摩擦等によって放熱シートがバッテリコアパックの側面から剥離したり、変形したりしてしまう。その結果、バッテリコアパックとケースとの間に放熱シートを良好に介在させることができず、バッテリパックの放熱性を高めることが困難になる懸念がある。 By the way, in the above battery pack, in order to interpose the heat dissipation sheet between the side surface of the battery core pack and the case, the battery core pack having the heat dissipation sheet provided on the side surface is inserted into the case from the housing port. There is a need. Under the present circumstances, if a case and a thermal radiation sheet contact, the thermal radiation sheet will peel from the side of a battery core pack, or will be deformed by the friction etc. which arise between each other. As a result, the heat dissipation sheet can not be favorably interposed between the battery core pack and the case, and there is a concern that it is difficult to enhance the heat dissipation of the battery pack.
　ケース内にバッテリコアパックを収容する際に、ケースと放熱シートとが接触することを回避するためには、ケースの内面とバッテリコアパックの側面とが十分に離間するように、ケースやバッテリコアパック等の寸法を設定することが考えられる。しかしながら、この場合、ケースと放熱シートとの離間距離が大きくなってしまうため、結局、バッテリパックの放熱性を十分に高めることが困難になる。 When housing the battery core pack in the case, in order to avoid contact between the case and the heat dissipation sheet, the case or battery core should be sufficiently separated from the inner surface of the case and the side surface of the battery core pack. It is conceivable to set the dimensions of the pack or the like. However, in this case, since the separation distance between the case and the heat dissipation sheet becomes large, it becomes difficult to sufficiently improve the heat dissipation of the battery pack.
　本発明の主たる目的は、ケースとバッテリコアパックの間に放熱シートを良好に介在させて、放熱性を効果的に向上させることが容易なバッテリパックを提供することにある。 The main object of the present invention is to provide a battery pack in which a heat dissipating sheet can be favorably interposed between a case and a battery core pack to effectively improve the heat dissipation.
　本発明の一実施形態によれば、セルホルダに保持された複数の電池セルを有するバッテリコアパックと、前記バッテリコアパックを収容するケースとを備えるバッテリパックであって、前記バッテリコアパックの側面と前記ケースとの間には、前記電池セルの熱を放熱する放熱シートと、前記ケースの内面との間に生じる摩擦力が前記放熱シートよりも小さい摩擦低減シートとが収容され、前記摩擦低減シートは、前記放熱シートと前記ケースの内面との間に介在するバッテリパックが提供される。 According to one embodiment of the present invention, there is provided a battery pack including a battery core pack having a plurality of battery cells held in a cell holder, and a case for housing the battery core pack, the side surface of the battery core pack Between the case and the case, a heat dissipation sheet for radiating the heat of the battery cell and a friction reduction sheet having a smaller friction force than the heat dissipation sheet generated between the inner surface of the case and the case are accommodated. According to another aspect of the present invention, there is provided a battery pack interposed between the heat dissipating sheet and the inner surface of the case.
　このバッテリパックでは、ケースの内面との間に生じる摩擦力（以下、単に摩擦力ともいう）が放熱シートよりも小さい摩擦低減シートが、放熱シートとケースの内面との間に介在する。このようなバッテリパックは、ケースの内面と放熱シートとを直接接触させることなく得ることができる。 In this battery pack, a friction reducing sheet having a smaller frictional force (hereinafter, also simply referred to as a frictional force) generated with the inner surface of the case than the heat dissipation sheet intervenes between the heat dissipation sheet and the inner surface of the case. Such a battery pack can be obtained without direct contact between the inner surface of the case and the heat dissipation sheet.
　すなわち、ケースとバッテリコアパックの側面との間に放熱シートを介在させるべく、バッテリコアパックの側面に放熱シートを設けてケースに収容する際、該放熱シートを摩擦低減シートによって覆った状態とすることができる。摩擦低減シートは、上記の通り摩擦力が小さく、ケースの内面と接触しても変形や剥離が生じ難い。このため、摩擦低減シートとケースの内面とを摺動させることで、放熱シートがバッテリコアパックの側面から剥離したり、変形したりすることを抑制しながら、バッテリコアパックをケースに収容することができる。 That is, in order to interpose the heat dissipation sheet between the case and the side surface of the battery core pack, when the heat dissipation sheet is provided on the side surface of the battery core pack and housed in the case, the heat dissipation sheet is covered by the friction reduction sheet. be able to. As described above, the friction reducing sheet has a small frictional force, and is less susceptible to deformation or peeling even when in contact with the inner surface of the case. Therefore, by sliding the friction reducing sheet and the inner surface of the case, the battery core pack is accommodated in the case while suppressing the peeling and deformation of the heat dissipating sheet from the side surface of the battery core pack. Can.
　従って、バッテリコアパックの側面とケースの内面との両方に放熱シートが密着するように、バッテリコアパックの側面とケースの内面との間隔を設定しても、互いの間に放熱シートを良好に介在させることができる。これによって、電池セルの熱を、放熱シートを介してケースへと効率的に伝導させることが可能になる。つまり、バッテリパックの放熱性を効果的に向上させることが容易である。 Therefore, even if the distance between the side face of the battery core pack and the inner face of the case is set so that the heat sink sheet is in close contact with both the side face of the battery core pack and the inner face of the case, It can be intervened. This enables the heat of the battery cell to be efficiently conducted to the case through the heat dissipation sheet. That is, it is easy to effectively improve the heat dissipation of the battery pack.
　上記のバッテリパックにおいて、前記ケースは、前記バッテリコアパックの側面を覆う外殻ケースと、前記ケースに対する前記バッテリコアパックの収容口となる前記外殻ケースの開口を覆う閉塞ケースと、を有し、前記放熱シートは、前記外殻ケースの内面に臨む前記摩擦低減シートと前記バッテリコアパックの側面との間で厚さ方向に圧縮された状態で前記ケースに収容されることが好ましい。 In the above battery pack, the case has an outer shell case covering a side surface of the battery core pack, and a closing case covering an opening of the outer shell case serving as an accommodation port of the battery core pack to the case. The heat dissipating sheet is preferably accommodated in the case in a state compressed in the thickness direction between the friction reducing sheet facing the inner surface of the outer shell case and the side surface of the battery core pack.
　このように、放熱シートを圧縮された状態とすることで、電池セルの熱を、放熱シートを介してケースへと効率的に伝導させることができるため、バッテリパックの放熱性のさらなる向上を図ることができる。 As described above, by setting the heat dissipation sheet in a compressed state, the heat of the battery cell can be efficiently conducted to the case through the heat dissipation sheet, so the heat dissipation of the battery pack can be further improved. be able to.
本発明の実施形態に係るバッテリパックの概略斜視図である。1 is a schematic perspective view of a battery pack according to an embodiment of the present invention. 摩擦低減シートと、放熱シートと、連結体との分解斜視図である。It is a disassembled perspective view with a friction reduction sheet | seat, a thermal radiation sheet | seat, and a connection body. バッテリコアパックの分解斜視図である。It is an exploded perspective view of a battery core pack. 露出部に放熱シート及び摩擦低減シートを設けた連結体を説明する説明図である。It is explanatory drawing explaining the connection body which provided the thermal radiation sheet | seat and the friction reduction sheet | seat in the exposed part. 図４の連結体に押さえ治具を設けた状態で外殻ケースに収容する様子を説明する説明図である。It is explanatory drawing explaining a mode that it accommodates in an outer shell case in the state which provided the holding jig in the connection body of FIG. 図５の外殻ケースに収容した連結体から押さえ治具を取り外す様子を説明する説明図である。It is explanatory drawing explaining a mode that a holding jig is removed from the connection body accommodated in the shell case of FIG.
　本発明に係るバッテリパックについて好適な実施形態を挙げ、添付の図面を参照しながら詳細に説明する。 A preferred embodiment of the battery pack according to the present invention will be described in detail with reference to the attached drawings.
　図１は、本実施形態に係るバッテリパック１０の概略斜視図である。なお、図１では、理解を容易にするべく、外殻ケース１２を二点鎖線で示し、該外殻ケース１２の内側に配置される構成要素を図示している。 FIG. 1 is a schematic perspective view of a battery pack 10 according to the present embodiment. In addition, in FIG. 1, in order to facilitate understanding, the outer shell case 12 is indicated by a two-dot chain line, and components disposed inside the outer shell case 12 are illustrated.
　バッテリパック１０は、例えば、電動アシスト自転車や、電動バイク等の電動車両（不図示）に着脱可能に搭載される携帯式のバッテリパック１０として好適に適用することができる。そこで、以下では、バッテリパック１０が電動車両に搭載される例について説明するが、特にこれに限定されるものではなく、バッテリパック１０は、電力を必要とする様々な機器に適用することができる。また、バッテリパック１０の上下方向は、該バッテリパック１０を電動車両に搭載した際の鉛直方向（図１の矢印Ｘ１、Ｘ２方向）を基準とする。 The battery pack 10 can be suitably applied as, for example, a portable battery pack 10 that is removably mounted on an electrically powered vehicle (not shown) such as an electrically assisted bicycle or an electrically driven motorcycle. Therefore, although an example in which battery pack 10 is mounted on an electric vehicle will be described below, the present invention is not particularly limited to this, and battery pack 10 can be applied to various devices that require electric power. . Further, the vertical direction of the battery pack 10 is based on the vertical direction (arrows X1 and X2 in FIG. 1) when the battery pack 10 is mounted on the electric vehicle.
　図１に示すように、バッテリパック１０は、ケース１４と、２個のバッテリコアパック１６ａ、１６ｂを連結した連結体１８と、放熱シート２０と、摩擦低減シート２２と、バッテリ管理装置（Ｂａｔｔｅｒｙ Ｍａｎａｇｅｍｅｎｔ Ｕｎｉｔ：ＢＭＵ）２４と、不図示のコネクタ部とを主に備える。ケース１４は、例えば、アルミニウム等の金属や、樹脂（繊維強化樹脂を含む）等から形成することができる。また、ケース１４は、連結体１８の底面を覆うボトムケース２６と、該ボトムケース２６の上端部に取り付けられ、連結体１８の側面を覆う外殻ケース１２と、該外殻ケース１２の上端部に取り付けられ、連結体１８の上面を覆うトップケース２８とを有する。 As shown in FIG. 1, the battery pack 10 includes a case 14, a connector 18 in which two battery core packs 16 a and 16 b are connected, a heat dissipation sheet 20, a friction reduction sheet 22, and a battery management device (Battery Management) Unit: BMU 24 mainly includes a connector unit (not shown). The case 14 can be formed of, for example, a metal such as aluminum, a resin (including a fiber reinforced resin), or the like. The case 14 is a bottom case 26 covering the bottom of the connector 18, an outer shell case 12 attached to the upper end of the bottom case 26 and covering the side of the connector 18, and an upper end of the outer shell 12. And a top case 28 that covers the top surface of the connector 18.
　ボトムケース２６は、上端部に開口が設けられた筐体であり、内部にコネクタ部等が収容される。コネクタ部は、例えば、該ボトムケース２６の底壁に形成された切り欠き等を介してケース１４の外部に露出し、電動車両の電力供給口、又は連結体１８を充電するための充電装置に対して接続可能となっている。なお、上記の切り欠き、電力供給口、充電装置は何れも不図示である。コネクタ部を電力供給口又は充電装置に接続することで、不図示のリード線等によって、電力供給口又は充電装置と連結体１８とを、ＢＭＵ２４を介して電気的に接続することができる。 The bottom case 26 is a housing having an opening at its upper end, and a connector portion and the like are accommodated inside. For example, the connector portion is exposed to the outside of the case 14 through a notch or the like formed on the bottom wall of the bottom case 26, and is used as a power supply port of the electric vehicle or a charging device for charging the connector 18. It is possible to connect to. In addition, said notch, an electric power supply port, and a charging device are all not shown. By connecting the connector portion to the power supply port or the charging device, the power supply port or the charging device and the coupling body 18 can be electrically connected via the BMU 24 by a lead wire (not shown) or the like.
　外殻ケース１２は、上下方向の両端部に開口が設けられている。外殻ケース１２の下端側の開口にボトムケース２６の上端側の一部が挿入される。外殻ケース１２に挿入されたボトムケース２６の上端よりも上方の外殻ケース１２の内壁には、該外殻ケース１２の周方向に沿って下側固定溝３０が形成されている。この下側固定溝３０に、連結体１８をその下側から支持する下側バッテリコアパックフレーム３２が固定されている。不図示ではあるが、ボトムケース２６の底面には、下側バッテリコアパックフレーム３２に向かって突出する凸部が設けられ、該凸部と下側バッテリコアパックフレーム３２とがボルト等によって固定されている。 The outer shell case 12 is provided with openings at both end portions in the vertical direction. A part of the upper end side of the bottom case 26 is inserted into the opening on the lower end side of the outer shell case 12. A lower fixing groove 30 is formed along the circumferential direction of the outer shell case 12 on the inner wall of the outer shell case 12 above the upper end of the bottom case 26 inserted into the outer shell case 12. The lower battery core pack frame 32 supporting the connector 18 from the lower side is fixed to the lower fixing groove 30. Although not shown, the bottom of the bottom case 26 is provided with a protrusion projecting toward the lower battery core pack frame 32, and the protrusion and the lower battery core pack frame 32 are fixed by bolts or the like. ing.
　外殻ケース１２の上端側の開口にトップケース２８の下端側の一部が挿入される。外殻ケース１２に挿入されたトップケース２８の下端よりも下方の外殻ケース１２の内壁には、上側固定溝３４が形成され、該上側固定溝３４に、連結体１８の上端面に当接する上側バッテリコアパックフレーム３６が固定されている。この上側バッテリコアパックフレーム３６と下側バッテリコアパックフレーム３２との間に連結体１８が挟持される。 A part of the lower end side of the top case 28 is inserted into the opening on the upper end side of the outer shell case 12. An upper fixing groove 34 is formed on the inner wall of the outer shell case 12 below the lower end of the top case 28 inserted in the outer shell case 12, and the upper fixing groove 34 abuts on the upper end surface of the connector 18. Upper battery core pack frame 36 is fixed. A connecting body 18 is held between the upper battery core pack frame 36 and the lower battery core pack frame 32.
　トップケース２８は、下端部に開口が設けられた筐体であり、上端面には、バッテリパック１０を持ち運ぶ際に把持することが可能なハンドル部３８が設けられている。また、トップケース２８と上側バッテリコアパックフレーム３６も、ボトムケース２６と下側バッテリコアパックフレーム３２と同様にボルト（不図示）等によって固定されている。 The top case 28 is a housing having an opening at its lower end, and the upper end face is provided with a handle portion 38 that can be gripped when carrying the battery pack 10. The top case 28 and the upper battery core pack frame 36 are also fixed by bolts (not shown) or the like, similarly to the bottom case 26 and the lower battery core pack frame 32.
　連結体１８を構成する２個のバッテリコアパック１６ａ、１６ｂは、互いに略同様に構成される。そこで、２個のバッテリコアパック１６ａ、１６ｂの互いに対応する構成要素には、同一の参照符号を付して共通に説明する。また、２個のバッテリコアパック１６ａ、１６ｂを互いに区別しないときには、総称してバッテリコアパック１６ともいう。 The two battery core packs 16a, 16b constituting the coupling body 18 are configured substantially the same as each other. Therefore, components corresponding to each other of the two battery core packs 16a and 16b will be described in common by attaching the same reference numerals. When the two battery core packs 16 a and 16 b are not distinguished from one another, they are also collectively referred to as a battery core pack 16.
　図１～図３に示すように、バッテリコアパック１６は、複数の電池セル４０（図３参照）と、セルホルダ４２とを有する。図１に示すように、本実施形態では、バッテリコアパック１６とコネクタ部との間に不図示の配線等を収容する空間４３（図１参照）を形成するべく、バッテリコアパック１６は、その下端側の一部が切り欠かれた形状となっている。 As shown in FIGS. 1 to 3, the battery core pack 16 has a plurality of battery cells 40 (see FIG. 3) and a cell holder 42. As shown in FIG. 1, in the present embodiment, the battery core pack 16 is configured to have a space 43 (see FIG. 1) for accommodating wiring (not shown) or the like between the battery core pack 16 and the connector portion. The lower end is partially cut away.
　図３に示すように、電池セル４０は、例えば、円筒状であり、軸方向の両端部に正極端子４４及び負極端子４６がそれぞれ設けられている。電池セル４０の好適な種類としては、リチウムイオン二次電池を挙げることができるが、特にこれに限定されず、例えば、ニッケル水素電池やニッケルカドミウム電池等の二次電池を用いてもよい。 As shown in FIG. 3, the battery cell 40 has, for example, a cylindrical shape, and the positive electrode terminal 44 and the negative electrode terminal 46 are respectively provided at both ends in the axial direction. Although a lithium ion secondary battery can be mentioned as a suitable type of the battery cell 40, it is not particularly limited to this, and for example, a secondary battery such as a nickel hydrogen battery or a nickel cadmium battery may be used.
　セルホルダ４２は、正極側ホルダ４２ａ及び負極側ホルダ４２ｂを組み合わせて構成され、複数の電池セル４０を保持する保持部５０と、露出部５２が設けられた押さえ板部５３と、保持部５０及び押さえ板部５３を囲む周壁部５４とを有する。正極側ホルダ４２ａの露出部５２から正極端子４４が露出し、負極側ホルダ４２ｂの露出部５２から負極端子４６が露出する。 The cell holder 42 is configured by combining the positive electrode side holder 42a and the negative electrode side holder 42b, and holds the holding portion 50 for holding the plurality of battery cells 40, the pressing plate portion 53 provided with the exposed portion 52, the holding portion 50 and the pressing portion And a peripheral wall 54 surrounding the plate 53. The positive electrode terminal 44 is exposed from the exposed portion 52 of the positive electrode side holder 42a, and the negative electrode terminal 46 is exposed from the exposed portion 52 of the negative electrode side holder 42b.
　なお、以下では、セルホルダ４２について、上記の上下方向（以下、Ｘ方向ともいう）と、電池セル４０の軸方向（図２の矢印Ｙ１、Ｙ２方向、以下、Ｙ方向ともいう）と、上下方向及び軸方向の両方に直交する方向（図２の矢印Ｚ１、Ｚ２方向、以下、Ｚ方向ともいう）とを基準として説明する。 In the following, with regard to the cell holder 42, the above-mentioned vertical direction (hereinafter also referred to as X direction), the axial direction of the battery cell 40 (arrow Y1 and Y2 directions in FIG. 2; hereinafter also referred to as Y direction) A direction perpendicular to both the axial direction and the axial direction (directions of arrows Z1 and Z2 in FIG. 2, hereinafter also referred to as Z direction) will be described as a reference.
　保持部５０は、複数の挿通孔５６を有し、電池セル４０を該挿通孔５６にそれぞれ挿通した状態で保持する。挿通孔５６は、Ｙ方向に沿って延在し、その延在方向の両端の開口から電池セル４０の正極端子４４又は負極端子４６をそれぞれ露出させる。挿通孔５６の径は、電池セル４０の外径に応じた大きさである。保持部５０に保持された複数の電池セル４０は、それぞれの正極端子４４が互いに面一に配置され、且つそれぞれの負極端子４６が互いに面一に配置される。また、保持部５０に保持された複数の電池セル４０の周面同士の間には、絶縁樹脂等からなるポッティング材（不図示）が充填されてもよい。 The holding portion 50 has a plurality of insertion holes 56, and holds the battery cells 40 in a state of being respectively inserted into the insertion holes 56. The insertion holes 56 extend along the Y direction, and expose the positive electrode terminal 44 or the negative electrode terminal 46 of the battery cell 40 from the openings at both ends in the extending direction. The diameter of the insertion hole 56 is a size corresponding to the outer diameter of the battery cell 40. In the plurality of battery cells 40 held by the holding unit 50, the respective positive electrode terminals 44 are disposed flush with one another, and the respective negative electrodes 46 are disposed flush with one another. A potting material (not shown) made of an insulating resin or the like may be filled between the circumferential surfaces of the plurality of battery cells 40 held by the holding unit 50.
　押さえ板部５３は、保持部５０のＹ方向の両端側にそれぞれ設けられ、挿通孔５６の開口に対応する位置に露出部５２として貫通孔が形成されている。挿通孔５６の開口及び露出部５２を介して正極端子４４及び負極端子４６（以下、これらを総称して電極端子ともいう）がそれぞれセルホルダ４２の外部に露出する。また、正極端子４４を露出させる露出部５２と、負極端子４６を露出させる露出部５２とのそれぞれを覆うように、複数のバスバープレート６０（図２参照）が押さえ板部５３に取り付けられる。押さえ板部５３には、バスバープレート６０同士の間に介在して互いを絶縁する突条部６２が設けられている。 The holding plate portions 53 are respectively provided on both ends of the holding portion 50 in the Y direction, and through holes are formed as exposed portions 52 at positions corresponding to the openings of the insertion holes 56. The positive electrode terminal 44 and the negative electrode terminal 46 (hereinafter, also collectively referred to as electrode terminals) are exposed to the outside of the cell holder 42 through the opening of the insertion hole 56 and the exposed portion 52. A plurality of bus bar plates 60 (see FIG. 2) are attached to the pressing plate 53 so as to cover the exposed portion 52 exposing the positive electrode terminal 44 and the exposed portion 52 exposing the negative electrode terminal 46. The holding plate portion 53 is provided with protruding portions 62 interposed between the bus bar plates 60 to insulate them from each other.
　一方のバッテリコアパック１６ａの負極端子４６側と、他方のバッテリコアパック１６ｂの正極端子４４側とが互いに対向するように、２個のバッテリコアパック１６ａ、１６ｂが連結されて連結体１８が形成されている。 The two battery core packs 16a and 16b are connected so that the negative electrode terminal 46 side of one battery core pack 16a and the positive electrode terminal 44 side of the other battery core pack 16b are opposed to each other to form a connected body 18 It is done.
　一方のバッテリコアパック１６ａの正極端子４４側と、他方のバッテリコアパック１６ｂの負極端子４６側、換言すると、連結体１８のＹ方向の両側の側面（以下、単に側面ともいう）は、外殻ケース１２の内面側に臨む。 The side of the positive electrode terminal 44 of one battery core pack 16a and the side of the negative electrode terminal 46 of the other battery core pack 16b, in other words, the side surfaces on both sides in the Y direction of the connector 18 (hereinafter, also simply referred to as side surfaces) Face the inner side of the case 12
　図２に示すように、複数のバスバープレート６０のそれぞれは、正極端子４４同士又は負極端子４６同士を所定の個数ずつ並列に接続するものであり、露出部５２内に進入して電極端子と接触する突出部６４が例えばエンボス加工等によって設けられている。バスバープレート６０には、周壁部５４の端面に設けられた溝６６に挿入される接続端部６８がそれぞれ設けられている。この接続端部６８と上記のリード線等が接続されることにより、複数のバスバープレート６０が、互いに直列に接続された状態でＢＭＵ２４を介してコネクタ部に接続される。 As shown in FIG. 2, each of the plurality of bus bar plates 60 connects the positive electrode terminals 44 or the negative electrodes 46 in parallel by a predetermined number, and enters the exposed portion 52 to be in contact with the electrode terminals The protruding portion 64 is provided, for example, by embossing. Connection end portions 68 to be inserted into grooves 66 provided on the end surfaces of the peripheral wall portion 54 are provided on the bus bar plate 60, respectively. A plurality of bus bar plates 60 are connected to the connector portion via the BMU 24 in a state of being connected in series with each other by connecting the connection end portion 68 and the above-described lead wires and the like.
　連結体１８の側面と、外殻ケース１２の内面との間には、放熱シート２０と、摩擦低減シート２２とが収容される。具体的には、摩擦低減シート２２は、外殻ケース１２の内面に臨むように配置され、放熱シート２０は、摩擦低減シート２２と連結体１８の側面との間で厚さ方向に圧縮された状態で配置される。 The heat dissipation sheet 20 and the friction reducing sheet 22 are accommodated between the side surface of the coupling body 18 and the inner surface of the outer shell case 12. Specifically, friction reduction sheet 22 is disposed to face the inner surface of outer shell case 12, and heat dissipation sheet 20 is compressed in the thickness direction between friction reduction sheet 22 and the side surface of connector 18. Arranged in the state.
　放熱シート２０は、例えば、シリコン樹脂等の電池セル４０の放熱を促すことができる弾性材料等からなり、バスバープレート６０（露出部５２）の全体を覆う。摩擦低減シート２２は、例えば、ポリイミドフィルム、ポリテトラフルオロエチレンフィルム、ポリプロピレンフィルム、ポリエチレンテレフタラートフィルム等からなり、外殻ケース１２の内面との間に生じる摩擦力（以下、単に摩擦力ともいう）が放熱シート２０よりも小さくなるように形成されている。また、摩擦低減シート２２の面積は、放熱シート２０の面積よりも大きいことが好ましい。 The heat dissipation sheet 20 is made of, for example, an elastic material or the like capable of promoting the heat dissipation of the battery cell 40 such as silicon resin, and covers the entire bus bar plate 60 (exposed portion 52). The friction reducing sheet 22 is made of, for example, a polyimide film, a polytetrafluoroethylene film, a polypropylene film, a polyethylene terephthalate film or the like, and the friction force generated between it and the inner surface of the outer shell case 12 (hereinafter also referred to simply as the friction force) Is smaller than the heat radiation sheet 20. The area of the friction reducing sheet 22 is preferably larger than the area of the heat dissipation sheet 20.
　バッテリコアパック１６ａの正極側ホルダ４２ａのＹ方向一端側（図１の矢印Ｙ２側）の上端部と、バッテリコアパック１６ｂの負極側ホルダ４２ｂのＹ方向他端側（図１の矢印Ｙ１側）の上端部には、上側に向かって突出する突出壁７０がそれぞれ設けられる。突出壁７０の上端面に上側バッテリコアパックフレーム３６が当接する。これによって、連結体１８と上側バッテリコアパックフレーム３６との間に空間７２が形成され、該空間７２にＢＭＵ２４が配設されている（図１参照）。 The upper end portion of one end side (the arrow Y2 side in FIG. 1) of the positive electrode side holder 42a of the battery core pack 16a and the other end side (the arrow Y1 side in FIG. 1) of the negative side holder 42b of the battery core pack 16b The projecting wall 70 which protrudes toward upper side is each provided in the upper end part of. The upper battery core pack frame 36 abuts on the upper end surface of the projecting wall 70. Thus, a space 72 is formed between the connector 18 and the upper battery core pack frame 36, and the BMU 24 is disposed in the space 72 (see FIG. 1).
　ＢＭＵ２４は、例えば、バッテリコアパック１６の充放電の制御を行う制御部と、電動車両及び充電装置と通信を行う通信部と、電池セル４０の温度や電圧等から検出したバッテリコアパック１６の状態を記憶する記憶部とを有する（何れも不図示）。 For example, the BMU 24 controls the charge and discharge of the battery core pack 16, the communication unit that communicates with the electric vehicle and the charging device, and the state of the battery core pack 16 detected from the temperature and voltage of the battery cells 40. And a storage unit for storing (all not shown).
　本実施形態に係るバッテリパック１０は、基本的には以上のように構成される。このバッテリパック１０では、例えば、ハンドル部３８を把持してバッテリパック１０を充電装置の近傍に持ち運び、コネクタ部と充電装置とを接続することにより、電池セル４０の充電を行うことができる。一方、例えば、ハンドル部３８を把持して持ち運んだバッテリパック１０を電動車両に搭載して、コネクタ部と電力供給口とを接続することにより、電池セル４０の放電を行うことができる。 The battery pack 10 according to the present embodiment is basically configured as described above. In the battery pack 10, for example, the battery cell 40 can be charged by holding the handle portion 38, carrying the battery pack 10 in the vicinity of the charging device, and connecting the connector portion and the charging device. On the other hand, for example, the battery cell 10 can be discharged by mounting the battery pack 10 gripped and carried by the handle portion 38 on the electric vehicle and connecting the connector portion and the power supply port.
　以下、図４～図６を参照しつつ、バッテリパック１０の製造方法について説明する。この製造方法は、外殻ケース１２に連結体１８とともに、放熱シート２０及び摩擦低減シート２２を収容する収容工程を有する。以下では、収容工程において、外殻ケース１２の上側の開口から連結体１８等を挿入する例について説明する。すなわち、外殻ケース１２の上側の開口が連結体１８の収容口となり、該外殻ケース１２の上側の開口を覆うトップケース２８が閉塞ケースとなる。 Hereinafter, a method of manufacturing the battery pack 10 will be described with reference to FIGS. 4 to 6. This manufacturing method includes an accommodating step of accommodating the heat dissipation sheet 20 and the friction reducing sheet 22 together with the connecting body 18 in the outer shell case 12. Below, in an accommodation process, the example which inserts connector 18 grade | etc., From the upper opening of outer shell case 12 is demonstrated. That is, the upper opening of the outer shell case 12 serves as an accommodation port for the connector 18, and the top case 28 covering the upper opening of the outer shell case 12 serves as a closed case.
　しかしながら、特にこれに限定されるものではなく、収容工程では、外殻ケース１２の下側の開口から連結体１８等を挿入してもよい。この場合、外殻ケース１２の下側の開口が連結体１８の収容口となり、該外殻ケース１２の下側の開口を覆うボトムケース２６が閉塞ケースとなる。 However, the present invention is not particularly limited to this, and in the storing step, the connector 18 or the like may be inserted from the lower opening of the outer shell case 12. In this case, the lower opening of the outer shell case 12 serves as an accommodation port for the connecting member 18, and the bottom case 26 covering the lower opening of the outer shell case 12 serves as a closed case.
　収容工程では、先ず、図４に示すように、連結体１８の側面に放熱シート２０を設ける。放熱シート２０は、どのような方法で連結体１８の側面に設けてもよいが、例えば、放熱シート２０の粘着性を利用して、連結体１８の側面に放熱シート２０を貼り付けること等が可能である。 In the accommodation step, first, as shown in FIG. 4, the heat dissipation sheet 20 is provided on the side surface of the connecting member 18. The heat dissipating sheet 20 may be provided on the side surface of the connecting body 18 by any method, but for example, the heat dissipating sheet 20 may be attached to the side surface of the connecting body 18 by using the adhesiveness of the heat dissipating sheet 20 It is possible.
　次に、連結体１８の側面に設けた放熱シート２０を覆うように摩擦低減シート２２を設ける。摩擦低減シート２２も、放熱シート２０の粘着性を利用して、該放熱シート２０に貼り付けること等が可能である。あるいは、摩擦低減シート２２の一方の面に熱伝導性グリスを塗布して、放熱シート２０に貼り付けても良い。 Next, a friction reducing sheet 22 is provided to cover the heat dissipation sheet 20 provided on the side surface of the connector 18. The friction reduction sheet 22 can also be attached to the heat dissipation sheet 20 by utilizing the adhesiveness of the heat dissipation sheet 20. Alternatively, thermally conductive grease may be applied to one surface of the friction reducing sheet 22 and attached to the heat dissipation sheet 20.
　次に、図５に示すように、摩擦低減シート２２の下端側を含む連結体１８の底部を覆うように、該連結体１８に押さえ治具７４を取り付ける。これによって、摩擦低減シート２２の下端と連結体１８の側面とを固定した状態で、外殻ケース１２の収容口から連結体１８を押さえ治具７４ごと挿入する。 Next, as shown in FIG. 5, a pressing jig 74 is attached to the connector 18 so as to cover the bottom of the connector 18 including the lower end side of the friction reducing sheet 22. By this, in a state where the lower end of the friction reducing sheet 22 and the side surface of the connecting member 18 are fixed, the connecting member 18 is inserted together with the pressing jig 74 from the accommodation opening of the outer shell case 12.
　次に、図６に示すように、外殻ケース１２の下端側の開口から押さえ治具７４を取り外すことで、外殻ケース１２に連結体１８とともに、放熱シート２０及び摩擦低減シート２２を収容することができる。外殻ケース１２の内面と連結体１８の側面との間隔は、放熱シート２０及び摩擦低減シート２２の合計厚さよりも僅かに小さく設定されている。このため、上記のようにして外殻ケース１２と連結体１８の側面との間に収容された放熱シート２０は、厚さ方向に圧縮された状態となる。 Next, as shown in FIG. 6, by removing the holding jig 74 from the opening on the lower end side of the outer shell case 12, the heat sink sheet 20 and the friction reduction sheet 22 are accommodated in the outer shell case 12 together with the connector 18. be able to. The distance between the inner surface of the outer shell case 12 and the side surface of the connector 18 is set to be slightly smaller than the total thickness of the heat dissipating sheet 20 and the friction reducing sheet 22. For this reason, the heat dissipation sheet 20 accommodated between the outer shell case 12 and the side surface of the connecting member 18 as described above is compressed in the thickness direction.
　次に、ケース１４に収容されるその他の構成要素を収容したり、各構成要素同士を電気的に接続したりした後、外殻ケース１２の下側の開口にボトムケース２６の上端側の一部を挿入して、下側バッテリコアパックフレーム３２とボトムケース２６とを固定する。同様に、外殻ケース１２の上側の開口にトップケース２８の下端側の一部を挿入して、上側バッテリコアパックフレーム３６とトップケース２８とを固定する。その結果、バッテリパック１０を得ることができる。 Next, after housing the other components accommodated in the case 14 or electrically connecting the respective components, the lower opening of the outer shell case 12 has one end on the upper end side of the bottom case 26. The lower battery core pack frame 32 and the bottom case 26 are fixed by inserting a part. Similarly, a part of the lower end side of the top case 28 is inserted into the upper opening of the outer case 12 to fix the upper battery core pack frame 36 and the top case 28. As a result, the battery pack 10 can be obtained.
　上記の通り、このバッテリパック１０は、ケース１４の内面と放熱シート２０とを直接接触させることなく得ることができる。すなわち、外殻ケース１２と連結体１８の側面との間に放熱シート２０を介在させるべく、連結体１８の側面に放熱シート２０を設けて外殻ケース１２に収容する際、該放熱シート２０を摩擦低減シート２２によって覆った状態とすることができる。摩擦低減シート２２は、上記の通り摩擦力が小さく、外殻ケース１２の内面と接触しても変形や剥離が生じ難い。このため、摩擦低減シート２２と外殻ケース１２の内面とを摺動させて、放熱シート２０が連結体１８の側面から剥離したり、変形したりすることを抑制しながら、連結体１８等を外殻ケース１２に収容することができる。 As described above, the battery pack 10 can be obtained without the inner surface of the case 14 and the heat dissipation sheet 20 being in direct contact with each other. That is, when the heat dissipating sheet 20 is provided on the side surface of the connecting body 18 so as to interpose the heat dissipating sheet 20 between the outer shell case 12 and the side surface of the connecting body 18, the heat dissipating sheet 20 is It can be in the state of being covered by the friction reducing sheet 22. The friction reducing sheet 22 has a small frictional force as described above, and is unlikely to be deformed or peeled off even when in contact with the inner surface of the outer shell case 12. Therefore, while the friction reducing sheet 22 and the inner surface of the outer shell case 12 are made to slide to prevent the heat dissipating sheet 20 from peeling off or deforming from the side surface of the connecting body 18, the connecting body 18 etc. It can be housed in the shell case 12.
　従って、連結体１８の側面（バスバープレート６０）と外殻ケース１２の内面との両方に放熱シート２０が密着するように、連結体１８の側面と外殻ケース１２の内面との間隔を設定しても、互いの間に放熱シート２０を良好に介在させることができる。すなわち、放熱シート２０を、摩擦低減シート２２と連結体１８の側面との間で厚さ方向に圧縮した状態で外殻ケース１２に良好に収容することができる。 Therefore, the distance between the side surface of the connector 18 and the inner surface of the outer shell case 12 is set so that the heat dissipating sheet 20 is in close contact with both the side surface of the connector 18 (bus bar plate 60) and the inner surface of the outer shell case 12 However, the heat dissipating sheet 20 can be favorably interposed between each other. That is, the heat dissipation sheet 20 can be favorably accommodated in the outer shell case 12 in a state of being compressed in the thickness direction between the friction reduction sheet 22 and the side surface of the connecting member 18.
　これによって、電池セル４０の熱を、放熱シート２０を介して外殻ケース１２へと効率的に伝導させることが可能になるため、バッテリパック１０の放熱性を効果的に向上させることが容易である。 As a result, the heat of the battery cell 40 can be efficiently conducted to the outer shell case 12 through the heat dissipation sheet 20, so it is easy to effectively improve the heat dissipation of the battery pack 10 is there.
　本発明は、上記した実施形態に特に限定されるものではなく、その要旨を逸脱しない範囲で種々の変形が可能である。 The present invention is not particularly limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention.
　例えば、上記の実施形態に係るバッテリパック１０では、２個のバッテリコアパック１６ａ、１６ｂを連結した連結体１８を備えることとした。しかしながら、バッテリパック１０は、１個のバッテリコアパックのみを備えてもよいし、３個以上のバッテリコアパックを連結した連結体（不図示）を備えてもよい。また、放熱シート２０及び摩擦低減シート２２は、連結体１８の少なくとも何れか１つの側面と、ケース１４の内面との間に収容されていればよい。放熱シート２０及び摩擦低減シート２２は、例えば、Ｚ方向の両側の側面と外殻ケース１２の内面との間に収容されてもよい。 For example, in the battery pack 10 according to the above-described embodiment, the connecting body 18 in which the two battery core packs 16a and 16b are connected is provided. However, the battery pack 10 may include only one battery core pack, or may include a connector (not shown) in which three or more battery core packs are connected. Further, the heat dissipating sheet 20 and the friction reducing sheet 22 may be accommodated between at least one of the side surfaces of the connector 18 and the inner surface of the case 14. The heat dissipating sheet 20 and the friction reducing sheet 22 may be accommodated, for example, between the side surfaces on both sides in the Z direction and the inner surface of the outer shell case 12.
１０…バッテリパック　　　　　１２…外殻ケース
１４…ケース　　　　　　　　　
１６、１６ａ、１６ｂ…バッテリコアパック
１８…連結体　　　　　　　　　２０…放熱シート
２２…摩擦低減シート　　　　　２６…ボトムケース
２８…トップケース　　　　　　４０…電池セル
４２…セルホルダ 10 ... battery pack 12 ... shell case 14 ... case
16, 16a, 16b: battery core pack 18: connected body 20: heat dissipating sheet 22: friction reducing sheet 26: bottom case 28: top case 40: battery cell 42: cell holder

Claims (2)

  1. 　セルホルダ（４２）に保持された複数の電池セル（４０）を有するバッテリコアパック（１６）と、前記バッテリコアパック（１６）を収容するケース（１４）とを備えるバッテリパック（１０）であって、
    　前記バッテリコアパック（１６）の側面と前記ケース（１４）との間には、前記電池セル（４０）の熱を放熱する放熱シート（２０）と、前記ケース（１４）の内面との間に生じる摩擦力が前記放熱シート（２０）よりも小さい摩擦低減シート（２２）とが収容され、
    　前記摩擦低減シート（２２）は、前記放熱シート（２０）と前記ケース（１４）の内面との間に介在することを特徴とするバッテリパック（１０）。     A battery pack (10) comprising: a battery core pack (16) having a plurality of battery cells (40) held by a cell holder (42); and a case (14) for housing the battery core pack (16) ,
    Between the side surface of the battery core pack (16) and the case (14), between the heat dissipation sheet (20) for radiating the heat of the battery cell (40) and the inner surface of the case (14) And a friction reducing sheet (22) having a smaller frictional force than the heat dissipating sheet (20).
    A battery pack (10) characterized in that the friction reducing sheet (22) is interposed between the heat dissipating sheet (20) and the inner surface of the case (14).
  2. 　請求項１記載のバッテリパック（１０）において、
    　前記ケース（１４）は、前記バッテリコアパック（１６）の側面を覆う外殻ケース（１２）と、前記ケース（１４）に対する前記バッテリコアパック（１６）の収容口となる前記外殻ケース（１２）の開口を覆う閉塞ケース（２８）と、を有し、
    　前記放熱シート（２０）は、前記外殻ケース（１２）の内面に臨む前記摩擦低減シート（２２）と前記バッテリコアパック（１６）の側面との間で厚さ方向に圧縮された状態で前記ケース（１４）に収容されることを特徴とするバッテリパック（１０）。     The battery pack (10) according to claim 1, wherein
    The case (14) is an outer shell case (12) covering a side surface of the battery core pack (16), and the outer shell case (12) serving as an accommodation port for the battery core pack (16) with respect to the case (14). And a closed case (28) covering the opening of
    The heat radiation sheet (20) is compressed in the thickness direction between the friction reduction sheet (22) facing the inner surface of the outer shell case (12) and the side surface of the battery core pack (16). A battery pack (10) characterized by being accommodated in a case (14).
PCT/JP2018/034039 2017-09-29 2018-09-13 Battery pack WO2019065278A1 (en)

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JP7410029B2 (en) * 2018-07-31 2024-01-09 本田技研工業株式会社 battery pack
CN110127065B (en) * 2019-05-16 2020-08-25 东阳市阳涛电子科技有限公司 Unmanned aerial vehicle lithium battery system
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Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2007500920A (en) * 2003-07-31 2007-01-18 アヴェスター リミティッド パートナーシップ Polymer battery with temperature converter
WO2017064969A1 (en) * 2015-10-16 2017-04-20 株式会社豊田自動織機 Power storage pack

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007500920A (en) * 2003-07-31 2007-01-18 アヴェスター リミティッド パートナーシップ Polymer battery with temperature converter
WO2017064969A1 (en) * 2015-10-16 2017-04-20 株式会社豊田自動織機 Power storage pack

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