WO2016035537A1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
WO2016035537A1
WO2016035537A1 PCT/JP2015/073030 JP2015073030W WO2016035537A1 WO 2016035537 A1 WO2016035537 A1 WO 2016035537A1 JP 2015073030 W JP2015073030 W JP 2015073030W WO 2016035537 A1 WO2016035537 A1 WO 2016035537A1
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WO
WIPO (PCT)
Prior art keywords
battery
plate
side plate
housing
bottom plate
Prior art date
Application number
PCT/JP2015/073030
Other languages
French (fr)
Japanese (ja)
Inventor
崇 酒井
浩生 植田
加藤　崇行
Original Assignee
株式会社 豊田自動織機
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 株式会社 豊田自動織機 filed Critical 株式会社 豊田自動織機
Publication of WO2016035537A1 publication Critical patent/WO2016035537A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • 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
    • H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
    • 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 that houses a battery module in a housing.
  • Patent Document 1 discloses a battery pack in which a plurality of battery modules are housed in a housing. Each of the plurality of battery modules is electrically connected by the collecting portion. Specifically, a harness is connected to each battery module. Each battery module is connected in series or in parallel by connecting the harness of each battery module to the assembly. The collecting part is accommodated in a junction box.
  • An object of the present invention is to provide a battery pack that can reduce the number of parts.
  • a plurality of battery modules having battery cells, a plurality of harnesses connected to each of the plurality of battery modules, and a vertical direction than the battery module.
  • a battery pack is provided that includes an assembly portion that is disposed above and connects a plurality of harnesses, and a housing that houses the battery module, the harness, and the assembly portion.
  • the housing has a bottom plate, a side plate erected from the periphery of the bottom plate, and a top plate that is disposed to face the bottom plate and covers a space surrounded by the side plate, and the top plate has a first facing portion, In a state of facing the bottom plate, the second facing portion that is separated from the first facing portion, and a wall portion that connects the first facing portion and the second facing portion, the aggregate portion is exposed in the housing, It arrange
  • FIG. 1 is an exploded perspective view of a battery pack according to a first embodiment of the present invention.
  • the front view which shows the internal structure of a battery pack.
  • (A) is a figure which shows the bending amount of a top plate when an impact is added to the top plate of a comparative example,
  • (b) shows the bending amount of a top plate when an impact is applied to the top plate of 1st Embodiment.
  • Figure. The perspective view of a battery module.
  • FIG. 6 is a cross-sectional view taken along line 6-6 of FIG.
  • FIG. 7 is a cross-sectional view taken along line 7-7 in FIG.
  • the battery pack 10 has a housing 11.
  • a plurality of battery modules 30 are accommodated in the housing 11.
  • the housing 11 has a housing body 12 and a lid 19.
  • the housing main body 12 includes a bottom plate 13 and a plurality of side plates 14, 15, and 16 erected from the periphery of the bottom plate 13.
  • the bottom plate 13 is formed in a rectangular shape.
  • the first side plate 14, the second side plate 15, and the third side plate 16 are erected from three sides among the four sides of the bottom plate 13.
  • the first side plate 14 and the second side plate 15 are opposed to each other.
  • the third side plate 16 is disposed between the first side plate 14 and the second side plate 15.
  • the housing body 12 has a top plate 17 at a position facing the bottom plate 13.
  • the top plate 17 is supported by the first side plate 14, the second side plate 15, and the third side plate 16. That is, each side plate 14, 15, 16 is disposed between the bottom plate 13 and the top plate 17.
  • the housing body 12 has an opening 18 defined by the side plates 14, 15, 16 and the top plate 17.
  • the opening 18 is closed by a lid 19.
  • the lid body 19 is fixed to the housing body 12 so as to constitute one of the side plates erected from the peripheral edge of the bottom plate 13.
  • a space surrounded by the side plates 14, 15, 16 and the lid 19 is covered with a top plate 17.
  • the bottom plate 13 is made of a flat rectangular plate over the entire surface. Both the first side plate 14 and the second side plate 15 are rectangular. The height dimension of the first side plate 14 from the bottom plate 13 is smaller than the height dimension of the second side plate 15 from the bottom plate 13.
  • the top plate 17 has a first top portion 21 and a second top portion 22 that have different heights in the direction facing the bottom plate 13.
  • the second top portion 22 is separated from the first top portion 21 in the direction facing the bottom plate 13.
  • the first top part 21 and the second top part 22 are connected by a connecting part 23.
  • the first top portion 21 is a first facing portion
  • the second top portion 22 is a second facing portion
  • the connecting portion 23 is a wall portion connecting the first facing portion and the second facing portion, respectively. It is functioning.
  • the first top portion 21 is provided continuously with the first side plate 14.
  • the first top portion 21 is inclined so as to be separated from the bottom plate 13 toward the connecting portion 23 from the first side plate 14.
  • the continuous portion 23 is disposed opposite to the second side plate 15 and parallel to the second side plate 15.
  • the second top portion 22 is provided continuously with the second side plate 15.
  • the second top portion 22 is disposed in parallel with the bottom plate 13.
  • the top plate 17 is provided with a step by the first top portion 21 and the second top portion 22.
  • a concave portion 24 that is recessed from the continuous portion 23 and the first top portion 21 to the inside of the housing 11 is provided outside the housing 11.
  • the continuous portion 23 is provided with a connector 25 to which a charging plug is connected when the battery module 30 is charged.
  • the connector 25 protrudes from the recess 24 of the housing 11.
  • a plurality of battery modules 30 are placed on the bottom plate 13.
  • the battery module 30 is laminated in two places. Specifically, a first battery row 31 in which two battery modules 30 are stacked and a second battery row 32 in which three battery modules 30 are stacked are accommodated in the housing 11. In the opposing direction of the first side plate 14 and the second side plate 15, the first battery row 31 is disposed in the vicinity of the first side plate 14, and the second battery row 32 is disposed in the vicinity of the second side plate 15.
  • the battery module 30 has a plurality of battery cells 33.
  • Each of the plurality of battery cells 33 is juxtaposed in a state of being individually held by the battery holder 34.
  • Adjacent battery cells 33 are connected in series by being connected by a bus bar 35.
  • the first harness 36 is connected to one battery cell 33, and the second harness 37 is connected to the other battery cell 33. Yes.
  • One of the first harness 36 and the second harness 37 is a minus harness and the other is a plus harness.
  • the battery module 30 has an end plate 38 that sandwiches each battery cell 33 from both sides of the battery cell 33 in the juxtaposition direction.
  • the end plate 38 includes a clamping part 39 that clamps each battery cell 33 and an attachment part 40 having a through hole 41.
  • the attachment portion 40 is bent and extends from the clamping portion 39.
  • the battery module 30 is fixed to the housing body 12 by screwing the bolt 42 inserted through the through hole 41 of the mounting portion 40 into the third side plate 16.
  • a first collecting portion 51 and a second collecting portion 52 are fixed to the third side plate 16.
  • the first collecting portion 51 and the second collecting portion 52 are provided in a state exposed in the housing 11. That is, the first collecting unit 51 and the second collecting unit 52 are not accommodated in the junction box.
  • the first gathering part 51 and the second gathering part 52 are arranged in a region surrounded by the connecting part 23 and the second ceiling part 22.
  • the first collecting unit 51 and the second collecting unit 52 include the connecting unit 23, the second top unit 22, the battery module 30 stacked on the uppermost side of the first battery row 31, and the first Two battery rows 32 are arranged in a region surrounded by the battery modules 30 stacked on the uppermost side.
  • the first collecting portion 51 and the second collecting portion 52 are terminal blocks in which a conductor 54 is disposed on an insulating base 53.
  • a first harness 36 of each battery module 30 is connected to the first collecting portion 51.
  • the first harness 36 of each battery module 30 is electrically connected by the first collecting portion 51.
  • the second harness 37 of each battery module 30 is connected to the second assembly 52.
  • the second harness 37 of each battery module 30 is electrically connected by the second collecting portion 52.
  • the first harness 36 and the second harness 37 are connected to the connector 25.
  • the battery pack 10 is mounted on an industrial vehicle as a power source for a motor, for example.
  • the battery pack 10 is mounted on a vehicle with the bottom plate 13 facing downward in the vertical direction and the top plate 17 facing upward in the vertical direction. That is, the stacking direction and the vertical direction of each battery module 30 are the same, and each of the collecting portions 51 and 52 is disposed above the first battery row 31 in the vertical direction.
  • “upward in the vertical direction” is described as “upward”
  • “downward in the vertical direction” is described as “downward”.
  • the battery pack 10 preferably has a low center of gravity as much as possible in order to stabilize the posture when mounted or to function as a counterweight for an industrial vehicle. For this reason, each gathering part 51 and 52 lighter than the battery module 30 is arrange
  • Each of the collecting portions 51 and 52 is not disposed above the uppermost battery module 30 of the second battery row 32, but the uppermost portion of the first battery row 31 located immediately below each of the collecting portions 51 and 52. It is disposed above the battery module 30.
  • the center of gravity of the battery pack is likely to be lowered if the assembly portion is disposed above the battery row located immediately below the battery pack.
  • the center of gravity of the battery pack is increased when the assembly portion is disposed between the battery module and the bottom plate, and when the battery module is disposed between the assembly portion and the top plate.
  • the battery module need not be arranged between the assembly portion and the top plate. Therefore, “the state in which the collecting portion is arranged vertically above the battery module” indicates a state in which the battery module is not arranged between the collecting portion and the top plate.
  • the operation of the battery pack 10 will be described with reference to FIGS. 2 to 3B.
  • the first and second collecting portions 51 and 52 are exposed in the housing 11. That is, the first and second collecting portions 51 and 52 are arranged in the housing 11 without being covered by the junction box.
  • the harnesses 36 and 37 of the battery modules 30 are integrated in the first collecting unit 51 and the second collecting unit 52, respectively.
  • a junction box is generally used to protect the collecting units 51 and 52.
  • FIG. 1st Embodiment it replaces with accommodating each gathering part 51 and 52 in a junction box, and each gathering part 51 and 52 is protected by improving the intensity
  • FIG. 3A shows the deflection when an impact is applied from above to the flat top plate 101 provided between the first side plate 14 and the second side plate 15, and FIG. 3B shows the first embodiment.
  • the bending when an impact is applied to the second top portion 22 of the top plate 17 of the form from above is shown.
  • the amount of bending of the top plate 101 of the comparative example shown in FIG. 3A is larger than the amount of bending of the second top portion 22 shown in FIG.
  • the first side plate 14 and the second side plate 15 that support the top plate 101 suppress the bending of the top plate 101.
  • the bending of the top plate 101 is less likely to be suppressed.
  • the continuous portion 23 functions as a side plate that supports the second top portion 22, so the continuous portion 23 and the second side plate 15. Is smaller than the distance between the first side plate 14 and the second side plate 15.
  • the top plate 17 with the first top portion 21 and the second top portion 22 spaced from the first top portion 21, the amount of deflection when an impact is applied to the top plate 17 is reduced.
  • the strength of the plate 17 is improved.
  • the first side plate 14 and the second side plate 15 are described as side plates for suppressing the bending of the top plate 101 and the top plate 17, but the top plate 101 and the top plate are also formed by the third side plate 16 and the lid 19. The bending of 17 is suppressed.
  • the following effects can be obtained. (1)
  • the strength of the top plate 17 is improved.
  • the collecting portions 51 and 52 can be protected from the outside. For this reason, even if a junction box is abbreviate
  • the top plate 17 is provided with a step by the first top portion 21, the second top portion 22, and the connecting portion 23.
  • a recess 24 is defined outside the housing 11.
  • the housing 11 can be miniaturized by projecting the connector 25 from the recess 24 of the housing 11.
  • the battery pack 60 has a housing 61.
  • the housing 61 includes a bottom plate 62 and a plurality of side plates 63, 64, 65, 66 that stand from the periphery of the bottom plate 62.
  • the bottom plate 62 is formed in a rectangular shape.
  • the first side plate 63, the second side plate 64, the third side plate 65, and the fourth side plate 66 are erected from four sides of the bottom plate 62.
  • the first side plate 63 and the second side plate 64 are opposed to each other.
  • the third side plate 65 and the fourth side plate 66 are opposed to each other.
  • a plurality of battery modules 30 are fixed to each of the third side plate 65 and the fourth side plate 66.
  • the housing 11 has a top plate 70 at a position facing the bottom plate 62.
  • the top plate 70 includes a first top portion 71, a second top portion 72, and a third top portion 73 that have different heights in the direction facing the bottom plate 62.
  • One second ceiling 72 is provided on each side of the first ceiling 71.
  • the first top portion 71 and each second top portion 72 are connected by a first connecting portion 74.
  • the first top portion 71 and the second top portion 72 are each disposed in parallel with the bottom plate 62.
  • a first recess 75 is defined outside the housing 11 by a first continuous portion 74 and a second top portion 72.
  • One first recess 75 is provided on each side of the first ceiling 71.
  • One of the two second top portions 72 has a second recess 76 in which a part of the second top portion 72 is recessed toward the bottom plate 62.
  • the second recess 76 is partitioned by a third top portion 73 that is closer to the bottom plate 62 than the second top portion 72 and a second continuous portion 77 that connects the third top portion 73 and the second top portion 72.
  • the second connecting portion 77 is provided with a connector 25.
  • the third side plate 65 has a protruding portion 81 that protrudes from the first connecting portion 74 in the thickness direction of the first connecting portion 74.
  • the projecting portion 81 faces the first recess 75 defined by the second top portion 72 and the first connecting portion 74. Further, the protruding portion 81 of the third side plate 65 is disposed at a position not facing the second recess 76 so as not to hinder the connection of the charging plug to the connector 25.
  • the fourth side plate 66 is formed in a rectangular shape.
  • the fourth side plate 66 has a protruding portion 82 that protrudes from the first connecting portion 74 in the thickness direction of the first connecting portion 74.
  • the protruding portion 82 faces the first recess 75 defined by the second top portion 72 and the first connecting portion 74.
  • a first collecting portion 51 and a second collecting portion 52 are provided inside the housing 11.
  • the first collecting unit 51 and the second collecting unit 52 are provided in a region partitioned by the first top portion 71 and the first connecting portion 74. Two each of the first collecting unit 51 and the second collecting unit 52 are provided. One set of the first collecting portion 51 and the second collecting portion 52 is fixed to the third side plate 65 and the fourth side plate 66 respectively.
  • the second top portion 72 is a first facing portion
  • the first top portion 71 is a second facing portion
  • the first connecting portion 74 is a wall portion that connects the first facing portion and the second facing portion.
  • the top plate 70 is provided with a plurality of steps by providing three or more top portions 71, 72, 73. For this reason, the distance between the 1st continuous connection part 74 and the 2nd continuous connection part 77 which support each top part 71,72,73 can be made small, and the intensity
  • connection part 23 may be modified as follows. -You may provide the connector 25 in parts other than the connection part 23, such as a side plate. -You may connect the battery cell 33 of each battery module 30 in parallel.
  • each of the collecting portions 51 and 52 may be provided in a region surrounded by the second top portion 72 and the second connecting portion 77.
  • the first facing portion functions as the third top portion 73
  • the second facing portion functions as the second top portion 72.
  • the first top portion 21 may not be inclined and may be parallel to the bottom plate 13.
  • the third top portion 73 of the second embodiment may be parallel to the bottom plate 62.
  • the housing may have any shape.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

This battery pack has a housing. A plurality of battery modules are contained in the housing. The top plate of the housing has a first top part and a second top part which are different from each other in the height in the direction facing the bottom plate. The second top part is more distant from the bottom plate than the first top part in the direction facing the bottom plate. The first top part and the second top part are connected to each other by a connecting part. First harnesses connected to battery modules are connected to a first assembly part. Second harnesses connected to battery modules are connected to a second assembly part. The first and second assembly parts are arranged in a region that is surrounded by the connecting part and the second top part.

Description

電池パックBattery pack
　本発明は、ハウジングに電池モジュールを収容した電池パックに関する。 The present invention relates to a battery pack that houses a battery module in a housing.
　特許文献１は、複数の電池モジュールをハウジングに収容した電池パックを開示している。複数の電池モジュールのそれぞれは、集合部によって電気的に接続されている。具体的にいえば、各電池モジュールには、ハーネスが接続されている。各電池モジュールのハーネスを集合部に接続することで、各電池モジュールが直列又は並列に接続されている。集合部は、ジャンクションボックスに収容されている。 Patent Document 1 discloses a battery pack in which a plurality of battery modules are housed in a housing. Each of the plurality of battery modules is electrically connected by the collecting portion. Specifically, a harness is connected to each battery module. Each battery module is connected in series or in parallel by connecting the harness of each battery module to the assembly. The collecting part is accommodated in a junction box.
　上記の電池パックにおいては、部品点数を削減することが望まれている。 In the above battery pack, it is desired to reduce the number of parts.
特開２０１３－９０４８４号公報JP 2013-90484 A
　本発明の目的は、部品点数を削減することができる電池パックを提供することにある。 An object of the present invention is to provide a battery pack that can reduce the number of parts.
　上記課題を解決するため、本願発明の第一の態様によれば、電池セルを有する複数の電池モジュールと、複数の電池モジュールのそれぞれに接続された複数のハーネスと、電池モジュールよりも鉛直方向の上方に配置されるとともに複数のハーネス同士を接続する集合部と、電池モジュール、ハーネス及び集合部が収容されるハウジングとを備える電池パックが提供される。ハウジングは、底板と、底板の周縁から立設された側板と、底板と対向して配置されるとともに側板により囲まれる空間を覆う天板とを有し、天板は、第１対向部と、底板との対向方向に第１対向部より離間した第２対向部と、第１対向部と第２対向部とを繋ぐ壁部とを有し、集合部は、ハウジング内に露出した状態で、壁部と第２対向部とにより囲まれる領域に配置されている。 In order to solve the above problem, according to a first aspect of the present invention, a plurality of battery modules having battery cells, a plurality of harnesses connected to each of the plurality of battery modules, and a vertical direction than the battery module. A battery pack is provided that includes an assembly portion that is disposed above and connects a plurality of harnesses, and a housing that houses the battery module, the harness, and the assembly portion. The housing has a bottom plate, a side plate erected from the periphery of the bottom plate, and a top plate that is disposed to face the bottom plate and covers a space surrounded by the side plate, and the top plate has a first facing portion, In a state of facing the bottom plate, the second facing portion that is separated from the first facing portion, and a wall portion that connects the first facing portion and the second facing portion, the aggregate portion is exposed in the housing, It arrange | positions in the area | region enclosed by a wall part and a 2nd opposing part.
本発明の第１実施形態に係る電池パックの分解斜視図。1 is an exploded perspective view of a battery pack according to a first embodiment of the present invention. 電池パックの内部構成を示す正面図。The front view which shows the internal structure of a battery pack. （ａ）は比較例の天板に衝撃が加わったときの天板の撓み量を示す図、（ｂ）は第１実施形態の天板に衝撃が加わったときの天板の撓み量を示す図。(A) is a figure which shows the bending amount of a top plate when an impact is added to the top plate of a comparative example, (b) shows the bending amount of a top plate when an impact is applied to the top plate of 1st Embodiment. Figure. 電池モジュールの斜視図。The perspective view of a battery module. 本発明の第２実施形態に係る電池パックの斜視図。The perspective view of the battery pack which concerns on 2nd Embodiment of this invention. 図５の６－６線に沿った断面図。FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 図５の７－７線に沿った断面図。FIG. 7 is a cross-sectional view taken along line 7-7 in FIG.
（第１実施形態）
　以下、本発明の電池パックを具体化した第１実施形態について図１～図４を参照して説明する。 (First embodiment)
A first embodiment embodying the battery pack of the present invention will be described below with reference to FIGS.
　図１及び図２に示すように、電池パック１０は、ハウジング１１を有している。ハウジング１１には、複数の電池モジュール３０が収容されている。
　ハウジング１１は、ハウジング本体１２と、蓋体１９とを有している。ハウジング本体１２は、底板１３と、底板１３の周縁から立設する複数の側板１４，１５，１６とを有している。底板１３は、矩形状に形成されている。第１側板１４、第２側板１５及び第３側板１６は、底板１３の四辺のうち三つの辺からそれぞれ立設している。第１側板１４と第２側板１５とは対向している。第３側板１６は、第１側板１４と第２側板１５との間に配置されている。 As shown in FIGS. 1 and 2, the battery pack 10 has a housing 11. A plurality of battery modules 30 are accommodated in the housing 11.
The housing 11 has a housing body 12 and a lid 19. The housing main body 12 includes a bottom plate 13 and a plurality of side plates 14, 15, and 16 erected from the periphery of the bottom plate 13. The bottom plate 13 is formed in a rectangular shape. The first side plate 14, the second side plate 15, and the third side plate 16 are erected from three sides among the four sides of the bottom plate 13. The first side plate 14 and the second side plate 15 are opposed to each other. The third side plate 16 is disposed between the first side plate 14 and the second side plate 15.
　また、ハウジング本体１２は、底板１３と対向する位置に天板１７を有している。天板１７は、第１側板１４、第２側板１５及び第３側板１６によって支持されている。すなわち、各側板１４，１５，１６は、底板１３と天板１７との間に配置されている。 The housing body 12 has a top plate 17 at a position facing the bottom plate 13. The top plate 17 is supported by the first side plate 14, the second side plate 15, and the third side plate 16. That is, each side plate 14, 15, 16 is disposed between the bottom plate 13 and the top plate 17.
　ハウジング本体１２には、各側板１４，１５，１６と天板１７とによって、開口部１８が区画されている。開口部１８は、蓋体１９によって閉塞されている。蓋体１９は、ハウジング本体１２に固定されることで、底板１３の周縁から立設する側板の一つを構成している。各側板１４，１５，１６及び蓋体１９により囲まれる空間は、天板１７によって覆われている。 The housing body 12 has an opening 18 defined by the side plates 14, 15, 16 and the top plate 17. The opening 18 is closed by a lid 19. The lid body 19 is fixed to the housing body 12 so as to constitute one of the side plates erected from the peripheral edge of the bottom plate 13. A space surrounded by the side plates 14, 15, 16 and the lid 19 is covered with a top plate 17.
　底板１３は、全体に亘って平坦な矩形状の板からなる。第１側板１４及び第２側板１５は、ともに矩形状である。第１側板１４の底板１３からの高さ寸法は、第２側板１５の底板１３からの高さ寸法に比べて小さい。 The bottom plate 13 is made of a flat rectangular plate over the entire surface. Both the first side plate 14 and the second side plate 15 are rectangular. The height dimension of the first side plate 14 from the bottom plate 13 is smaller than the height dimension of the second side plate 15 from the bottom plate 13.
　天板１７は、底板１３との対向方向の高さが異なる第１天部２１及び第２天部２２を有している。第２天部２２は、底板１３との対向方向に第１天部２１よりも離間している。第１天部２１と第２天部２２とは、連設部２３によって繋がれている。 The top plate 17 has a first top portion 21 and a second top portion 22 that have different heights in the direction facing the bottom plate 13. The second top portion 22 is separated from the first top portion 21 in the direction facing the bottom plate 13. The first top part 21 and the second top part 22 are connected by a connecting part 23.
　第１実施形態では、第１天部２１が第１対向部、第２天部２２が第２対向部、連設部２３が第１対向部と第２対向部とを繋ぐ壁部として、それぞれ機能している。
　第１天部２１は、第１側板１４に連なって設けられている。第１天部２１は、第１側板１４から連設部２３に向かうにつれて底板１３から離間するように、傾斜している。連設部２３は、第２側板１５と対向しかつ第２側板１５と平行に配置されている。第２天部２２は、第２側板１５に連なって設けられている。第２天部２２は、底板１３と平行に配置されている。天板１７には、第１天部２１と第２天部２２とによって段差が設けられている。 In the first embodiment, the first top portion 21 is a first facing portion, the second top portion 22 is a second facing portion, and the connecting portion 23 is a wall portion connecting the first facing portion and the second facing portion, respectively. It is functioning.
The first top portion 21 is provided continuously with the first side plate 14. The first top portion 21 is inclined so as to be separated from the bottom plate 13 toward the connecting portion 23 from the first side plate 14. The continuous portion 23 is disposed opposite to the second side plate 15 and parallel to the second side plate 15. The second top portion 22 is provided continuously with the second side plate 15. The second top portion 22 is disposed in parallel with the bottom plate 13. The top plate 17 is provided with a step by the first top portion 21 and the second top portion 22.
　天板１７に段差を設けることで、ハウジング１１の外部には、連設部２３と第１天部２１とからハウジング１１の内側へ凹む凹部２４が設けられている。連設部２３には、電池モジュール３０を充電する際に充電プラグが接続されるコネクタ２５が設けられている。コネクタ２５は、ハウジング１１の凹部２４から突出している。 By providing a step on the top plate 17, a concave portion 24 that is recessed from the continuous portion 23 and the first top portion 21 to the inside of the housing 11 is provided outside the housing 11. The continuous portion 23 is provided with a connector 25 to which a charging plug is connected when the battery module 30 is charged. The connector 25 protrudes from the recess 24 of the housing 11.
　底板１３には、複数の電池モジュール３０が載置されている。電池モジュール３０は、２箇所に別れて積層されている。具体的には、二つの電池モジュール３０を積層した第１電池列３１と、三つの電池モジュール３０を積層した第２電池列３２とが、ハウジング１１に収容されている。第１側板１４と第２側板１５との対向方向において、第１電池列３１は第１側板１４近傍に配置され、第２電池列３２は第２側板１５近傍に配置されている。 A plurality of battery modules 30 are placed on the bottom plate 13. The battery module 30 is laminated in two places. Specifically, a first battery row 31 in which two battery modules 30 are stacked and a second battery row 32 in which three battery modules 30 are stacked are accommodated in the housing 11. In the opposing direction of the first side plate 14 and the second side plate 15, the first battery row 31 is disposed in the vicinity of the first side plate 14, and the second battery row 32 is disposed in the vicinity of the second side plate 15.
　図４に示すように、電池モジュール３０は、複数の電池セル３３を有している。複数の電池セル３３のそれぞれは、電池ホルダ３４によって個別に保持された状態で並設されている。隣り合う電池セル３３は、バスバー３５によって接続されることにより、直列に接続されている。電池セル３３の並設方向の両端に位置する二つの電池セル３３のうち、一方の電池セル３３には第１ハーネス３６が接続され、他方の電池セル３３には第２ハーネス３７が接続されている。第１ハーネス３６及び第２ハーネス３７のうち一方がマイナスハーネスであり、他方がプラスハーネスである。 As shown in FIG. 4, the battery module 30 has a plurality of battery cells 33. Each of the plurality of battery cells 33 is juxtaposed in a state of being individually held by the battery holder 34. Adjacent battery cells 33 are connected in series by being connected by a bus bar 35. Of the two battery cells 33 positioned at both ends of the battery cell 33 in the juxtaposition direction, the first harness 36 is connected to one battery cell 33, and the second harness 37 is connected to the other battery cell 33. Yes. One of the first harness 36 and the second harness 37 is a minus harness and the other is a plus harness.
　電池モジュール３０は、各電池セル３３を電池セル３３の並設方向の両側から挟持するエンドプレート３８を有している。エンドプレート３８は、各電池セル３３を挟持する挟持部３９と、貫通孔４１を有する取付部４０とを有している。取付部４０は、挟持部３９から屈曲して延びている。 The battery module 30 has an end plate 38 that sandwiches each battery cell 33 from both sides of the battery cell 33 in the juxtaposition direction. The end plate 38 includes a clamping part 39 that clamps each battery cell 33 and an attachment part 40 having a through hole 41. The attachment portion 40 is bent and extends from the clamping portion 39.
　図２及び図４に示すように、取付部４０の貫通孔４１を挿通したボルト４２が第３側板１６に螺合されることで、電池モジュール３０がハウジング本体１２に固定されている。
　第３側板１６には、第１集合部５１及び第２集合部５２が固定されている。第１集合部５１及び第２集合部５２は、ハウジング１１内に露出した状態で設けられている。すなわち、第１集合部５１及び第２集合部５２は、ジャンクションボックスに収容されていない。第１集合部５１及び第２集合部５２は、連設部２３と第２天部２２とにより囲まれる領域に配置されている。具体的にいえば、第１集合部５１及び第２集合部５２は、連設部２３と、第２天部２２と、第１電池列３１の最も上方に積層された電池モジュール３０と、第２電池列３２の最も上方に積層された電池モジュール３０とにより囲まれる領域に配置されている。 As shown in FIGS. 2 and 4, the battery module 30 is fixed to the housing body 12 by screwing the bolt 42 inserted through the through hole 41 of the mounting portion 40 into the third side plate 16.
A first collecting portion 51 and a second collecting portion 52 are fixed to the third side plate 16. The first collecting portion 51 and the second collecting portion 52 are provided in a state exposed in the housing 11. That is, the first collecting unit 51 and the second collecting unit 52 are not accommodated in the junction box. The first gathering part 51 and the second gathering part 52 are arranged in a region surrounded by the connecting part 23 and the second ceiling part 22. More specifically, the first collecting unit 51 and the second collecting unit 52 include the connecting unit 23, the second top unit 22, the battery module 30 stacked on the uppermost side of the first battery row 31, and the first Two battery rows 32 are arranged in a region surrounded by the battery modules 30 stacked on the uppermost side.
　第１集合部５１及び第２集合部５２は、絶縁性の台座５３上に導体５４を配置した端子台である。第１集合部５１には、各電池モジュール３０の第１ハーネス３６が接続されている。各電池モジュール３０の第１ハーネス３６は、第１集合部５１によって電気的に接続されている。第２集合部５２には、各電池モジュール３０の第２ハーネス３７が接続されている。各電池モジュール３０の第２ハーネス３７は、第２集合部５２によって電気的に接続されている。第１ハーネス３６と第２ハーネス３７とは、コネクタ２５に接続されている。 The first collecting portion 51 and the second collecting portion 52 are terminal blocks in which a conductor 54 is disposed on an insulating base 53. A first harness 36 of each battery module 30 is connected to the first collecting portion 51. The first harness 36 of each battery module 30 is electrically connected by the first collecting portion 51. The second harness 37 of each battery module 30 is connected to the second assembly 52. The second harness 37 of each battery module 30 is electrically connected by the second collecting portion 52. The first harness 36 and the second harness 37 are connected to the connector 25.
　上記の電池パック１０は、例えば、モータの電力源として産業車両に搭載されている。電池パック１０は、底板１３を鉛直方向の下方に天板１７を鉛直方向の上方に向けて、車両に搭載されている。すなわち、各電池モジュール３０の積層方向と鉛直方向とが同一であり、各集合部５１，５２は、第１電池列３１よりも鉛直方向の上方に配置されている。以下の説明では、「鉛直方向の上方」を「上方」と記載し、「鉛直方向の下方」を「下方」と記載する。 The battery pack 10 is mounted on an industrial vehicle as a power source for a motor, for example. The battery pack 10 is mounted on a vehicle with the bottom plate 13 facing downward in the vertical direction and the top plate 17 facing upward in the vertical direction. That is, the stacking direction and the vertical direction of each battery module 30 are the same, and each of the collecting portions 51 and 52 is disposed above the first battery row 31 in the vertical direction. In the following description, “upward in the vertical direction” is described as “upward”, and “downward in the vertical direction” is described as “downward”.
　電池パック１０は、搭載時の姿勢を安定化させたり、産業車両のカウンタウェイトとして機能させたりするため、重心を極力低くすることが好ましい。このため、電池モジュール３０よりも軽い各集合部５１，５２が、電池モジュール３０よりも上方に配置されている。 The battery pack 10 preferably has a low center of gravity as much as possible in order to stabilize the posture when mounted or to function as a counterweight for an industrial vehicle. For this reason, each gathering part 51 and 52 lighter than the battery module 30 is arrange | positioned upwards rather than the battery module 30. FIG.
　各集合部５１，５２は、第２電池列３２の最も上方の電池モジュール３０よりも上方に配置されていないが、各集合部５１，５２の直下に位置する第１電池列３１の最も上方の電池モジュール３０よりも上方に配置されている。電池モジュールが複数の電池列に別れて積層されているとき、集合部がその直下に位置する電池列よりも上方に配置されていれば、電池パックの重心は低くなり易い。つまり、電池パックの重心が高くなるのは、電池モジュールと底板との間に集合部が配置される場合であり、集合部と天板との間に電池モジュールが配置される場合である。このため、電池パックの重心を低くするには、集合部と天板との間に電池モジュールが配置されなければよい。したがって、「集合部が電池モジュールよりも鉛直方向の上方に配置されている状態」は、集合部と天板との間に電池モジュールが配置されていない状態を示す。 Each of the collecting portions 51 and 52 is not disposed above the uppermost battery module 30 of the second battery row 32, but the uppermost portion of the first battery row 31 located immediately below each of the collecting portions 51 and 52. It is disposed above the battery module 30. When the battery module is divided into a plurality of battery rows and stacked, the center of gravity of the battery pack is likely to be lowered if the assembly portion is disposed above the battery row located immediately below the battery pack. In other words, the center of gravity of the battery pack is increased when the assembly portion is disposed between the battery module and the bottom plate, and when the battery module is disposed between the assembly portion and the top plate. For this reason, in order to lower the center of gravity of the battery pack, the battery module need not be arranged between the assembly portion and the top plate. Therefore, “the state in which the collecting portion is arranged vertically above the battery module” indicates a state in which the battery module is not arranged between the collecting portion and the top plate.
　次に、上記の電池パック１０の作用について図２～図３（ｂ）を参照して説明する。
　図２に示すように、第１及び第２集合部５１，５２は、ハウジング１１内に露出している。すなわち、第１及び第２集合部５１，５２は、ジャンクションボックスに覆われることなくハウジング１１内に配置されている。また、第１集合部５１及び第２集合部５２には、各電池モジュール３０の各ハーネス３６，３７がそれぞれ集約されている。このため、各集合部５１，５２が破損すると、電池セル３３の適切な充放電を阻害するおそれがある。このため、各集合部５１，５２を外部から保護する必要があり、各集合部５１，５２の保護には、一般にジャンクションボックスが用いられている。第１実施形態では、各集合部５１，５２をジャンクションボックスに収容することに換えて、天板１７の強度を向上させることで、各集合部５１，５２が保護されている。 Next, the operation of the battery pack 10 will be described with reference to FIGS. 2 to 3B.
As shown in FIG. 2, the first and second collecting portions 51 and 52 are exposed in the housing 11. That is, the first and second collecting portions 51 and 52 are arranged in the housing 11 without being covered by the junction box. The harnesses 36 and 37 of the battery modules 30 are integrated in the first collecting unit 51 and the second collecting unit 52, respectively. For this reason, when each gathering part 51 and 52 breaks, there exists a possibility of inhibiting the appropriate charging / discharging of the battery cell 33. FIG. For this reason, it is necessary to protect the collecting units 51 and 52 from the outside, and a junction box is generally used to protect the collecting units 51 and 52. In 1st Embodiment, it replaces with accommodating each gathering part 51 and 52 in a junction box, and each gathering part 51 and 52 is protected by improving the intensity | strength of the top plate 17. FIG.
　図３（ａ）は、第１側板１４と第２側板１５との間に設けられた平坦な天板１０１に上方から衝撃が加わったときの撓みを、図３（ｂ）は、第１実施形態の天板１７の第２天部２２に上方から衝撃が加わったときの撓みをそれぞれ示す。図３（ａ）に示す比較例の天板１０１の撓み量の方が、図３（ｂ）に示す第２天部２２の撓み量よりも大きい。図３（ａ）に示すように、天板１０１に衝撃が加わると、天板１０１を支持している第１側板１４及び第２側板１５によって、天板１０１の撓みが抑制される。このとき、第１側板１４と第２側板１５との間の距離が大きいほど、天板１０１の撓みは抑制され難い。 FIG. 3A shows the deflection when an impact is applied from above to the flat top plate 101 provided between the first side plate 14 and the second side plate 15, and FIG. 3B shows the first embodiment. The bending when an impact is applied to the second top portion 22 of the top plate 17 of the form from above is shown. The amount of bending of the top plate 101 of the comparative example shown in FIG. 3A is larger than the amount of bending of the second top portion 22 shown in FIG. As shown in FIG. 3A, when an impact is applied to the top plate 101, the first side plate 14 and the second side plate 15 that support the top plate 101 suppress the bending of the top plate 101. At this time, as the distance between the first side plate 14 and the second side plate 15 increases, the bending of the top plate 101 is less likely to be suppressed.
　一方、図３（ｂ）に示すように、天板１７に段差を設けた場合、連設部２３が第２天部２２を支持する側板として機能するため、連設部２３と第２側板１５との間の距離は、第１側板１４と第２側板１５との間の距離よりも小さい。 On the other hand, as shown in FIG. 3B, when the top plate 17 is provided with a step, the continuous portion 23 functions as a side plate that supports the second top portion 22, so the continuous portion 23 and the second side plate 15. Is smaller than the distance between the first side plate 14 and the second side plate 15.
　このため、天板１７に第１天部２１と、第１天部２１から離間した第２天部２２とを設けることで、天板１７に衝撃が加わったときの撓み量が小さくなり、天板１７の強度が向上する。説明の便宜上、天板１０１及び天板１７の撓みを抑制する側板として、第１側板１４及び第２側板１５のみを記載したが、第３側板１６及び蓋体１９によっても天板１０１及び天板１７の撓みは抑制される。 For this reason, by providing the top plate 17 with the first top portion 21 and the second top portion 22 spaced from the first top portion 21, the amount of deflection when an impact is applied to the top plate 17 is reduced. The strength of the plate 17 is improved. For convenience of explanation, only the first side plate 14 and the second side plate 15 are described as side plates for suppressing the bending of the top plate 101 and the top plate 17, but the top plate 101 and the top plate are also formed by the third side plate 16 and the lid 19. The bending of 17 is suppressed.
　したがって、第１実施形態によれば、以下のような効果を得ることができる。
　（１）天板１７に第１天部２１と、第１天部２１から離間した第２天部２２とを設けることで、天板１７の強度が向上する。また、天板１７の第２天部２２と連設部２３とにより囲まれる領域に各集合部５１，５２を配置することで、各集合部５１，５２を外部から保護することができる。このため、ジャンクションボックスを省略しても、各集合部５１，５２の破損を抑制することができる。したがって、ジャンクションボックスを設けることなく各集合部５１，５２をハウジング１１に設けることができ、電池パック１０の部品点数を削減することもできる。 Therefore, according to the first embodiment, the following effects can be obtained.
(1) By providing the top plate 17 with the first top portion 21 and the second top portion 22 spaced from the first top portion 21, the strength of the top plate 17 is improved. In addition, by arranging the collecting portions 51 and 52 in the region surrounded by the second ceiling portion 22 and the connecting portion 23 of the top plate 17, the collecting portions 51 and 52 can be protected from the outside. For this reason, even if a junction box is abbreviate | omitted, damage to each collection part 51 and 52 can be suppressed. Therefore, the collecting portions 51 and 52 can be provided in the housing 11 without providing a junction box, and the number of parts of the battery pack 10 can be reduced.
　（２）天板１７には、第１天部２１、第２天部２２及び連設部２３によって、段差が設けられている。これにより、ハウジング１１の外部には、凹部２４が区画されている。また、コネクタ２５をハウジング１１の凹部２４から突出させることで、ハウジング１１の小型化が実現される。
（第２実施形態）
　以下、本発明の電池パックの第２実施形態について図５～図７を参照して説明する。以下の説明において、第１実施形態と同様の部分は、第１実施形態と同一の符号を付すことでその説明を省略する。 (2) The top plate 17 is provided with a step by the first top portion 21, the second top portion 22, and the connecting portion 23. As a result, a recess 24 is defined outside the housing 11. Further, the housing 11 can be miniaturized by projecting the connector 25 from the recess 24 of the housing 11.
(Second Embodiment)
Hereinafter, a second embodiment of the battery pack of the present invention will be described with reference to FIGS. In the following description, the same parts as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the description thereof is omitted.
　図５～図７に示すように、電池パック６０は、ハウジング６１を有している。ハウジング６１は、底板６２と、底板６２の周縁から立設する複数の側板６３，６４，６５，６６とを有している。底板６２は、矩形状に形成されている。第１側板６３、第２側板６４、第３側板６５及び第４側板６６は、底板６２の四辺からそれぞれ立設している。第１側板６３と第２側板６４とは対向している。第３側板６５と第４側板６６とは対向している。第３側板６５及び第４側板６６のそれぞれには、複数の電池モジュール３０が固定されている。 As shown in FIGS. 5 to 7, the battery pack 60 has a housing 61. The housing 61 includes a bottom plate 62 and a plurality of side plates 63, 64, 65, 66 that stand from the periphery of the bottom plate 62. The bottom plate 62 is formed in a rectangular shape. The first side plate 63, the second side plate 64, the third side plate 65, and the fourth side plate 66 are erected from four sides of the bottom plate 62. The first side plate 63 and the second side plate 64 are opposed to each other. The third side plate 65 and the fourth side plate 66 are opposed to each other. A plurality of battery modules 30 are fixed to each of the third side plate 65 and the fourth side plate 66.
　ハウジング１１は、底板６２と対向する位置に天板７０を有している。第２実施形態では、天板７０は、底板６２との対向方向の高さが異なる第１天部７１、第２天部７２及び第３天部７３を有している。第２天部７２は、第１天部７１の両側にそれぞれ一つずつ設けられている。第１天部７１と各第２天部７２とは、第１連設部７４によって繋がっている。第１天部７１及び第２天部７２はそれぞれ、底板６２と平行に配置されている。ハウジング１１の外部には、第１連設部７４と第２天部７２とによって、第１凹部７５が区画されている。第１凹部７５は、第１天部７１の両側にそれぞれ一つずつ設けられている。 The housing 11 has a top plate 70 at a position facing the bottom plate 62. In the second embodiment, the top plate 70 includes a first top portion 71, a second top portion 72, and a third top portion 73 that have different heights in the direction facing the bottom plate 62. One second ceiling 72 is provided on each side of the first ceiling 71. The first top portion 71 and each second top portion 72 are connected by a first connecting portion 74. The first top portion 71 and the second top portion 72 are each disposed in parallel with the bottom plate 62. A first recess 75 is defined outside the housing 11 by a first continuous portion 74 and a second top portion 72. One first recess 75 is provided on each side of the first ceiling 71.
　二つの第２天部７２のうちの一方は、第２天部７２の一部を底板６２に向けて凹ませた第２凹部７６を有している。第２凹部７６は、第２天部７２よりも底板６２に近接する第３天部７３と、第３天部７３及び第２天部７２を繋ぐ第２連設部７７とによって区画されている。第２連設部７７には、コネクタ２５が設けられている。 One of the two second top portions 72 has a second recess 76 in which a part of the second top portion 72 is recessed toward the bottom plate 62. The second recess 76 is partitioned by a third top portion 73 that is closer to the bottom plate 62 than the second top portion 72 and a second continuous portion 77 that connects the third top portion 73 and the second top portion 72. . The second connecting portion 77 is provided with a connector 25.
　第３側板６５は、第１連設部７４の厚み方向に第１連設部７４よりも突出した突出部８１を有している。突出部８１は、第２天部７２と第１連設部７４とによって区画された第１凹部７５と対向している。また、第３側板６５の突出部８１は、充電プラグのコネクタ２５への接続を阻害しないように、第２凹部７６と対向しない位置に配置されている。 The third side plate 65 has a protruding portion 81 that protrudes from the first connecting portion 74 in the thickness direction of the first connecting portion 74. The projecting portion 81 faces the first recess 75 defined by the second top portion 72 and the first connecting portion 74. Further, the protruding portion 81 of the third side plate 65 is disposed at a position not facing the second recess 76 so as not to hinder the connection of the charging plug to the connector 25.
　第４側板６６は、矩形状に形成されている。第４側板６６は、第１連設部７４の厚み方向に第１連設部７４よりも突出した突出部８２を有している。突出部８２は、第２天部７２と第１連設部７４とによって区画された第１凹部７５と対向している。 The fourth side plate 66 is formed in a rectangular shape. The fourth side plate 66 has a protruding portion 82 that protrudes from the first connecting portion 74 in the thickness direction of the first connecting portion 74. The protruding portion 82 faces the first recess 75 defined by the second top portion 72 and the first connecting portion 74.
　ハウジング１１の内部には、第１集合部５１及び第２集合部５２が設けられている。第２実施形態では、第１天部７１と第１連設部７４とによって区画された領域に、第１集合部５１及び第２集合部５２が設けられている。第１集合部５１及び第２集合部５２は、それぞれ二つずつ設けられている。第１集合部５１及び第２集合部５２は、第３側板６５と第４側板６６とにそれぞれ一組ずつ固定されている。第２実施形態では、第２天部７２が第１対向部、第１天部７１が第２対向部、第１連設部７４が第１対向部と第２対向部とを繋ぐ壁部として、それぞれ機能している。 Inside the housing 11, a first collecting portion 51 and a second collecting portion 52 are provided. In the second embodiment, the first collecting unit 51 and the second collecting unit 52 are provided in a region partitioned by the first top portion 71 and the first connecting portion 74. Two each of the first collecting unit 51 and the second collecting unit 52 are provided. One set of the first collecting portion 51 and the second collecting portion 52 is fixed to the third side plate 65 and the fourth side plate 66 respectively. In the second embodiment, the second top portion 72 is a first facing portion, the first top portion 71 is a second facing portion, and the first connecting portion 74 is a wall portion that connects the first facing portion and the second facing portion. , Each functioning.
　次に、上記の電池パック６０の作用について図５を参照して説明する。
　図５に示すように、天板７０には、三つ以上の天部７１，７２，７３を設けることで、複数の段差が設けられている。このため、各天部７１，７２，７３を支持する第１連設部７４及び第２連設部７７間の距離を小さくすることができ、天板７０の強度が向上する。したがって、各集合部５１，５２をハウジング１１内に露出した状態で設けても、各集合部５１，５２の破損を抑制することができる。また、天板７０に振動や衝撃が加わったときに、第３側板６５の突出部８１及び第４側板６６の突出部８２に振動や衝撃が加わることで、天板７０への衝撃や振動を緩和することができる。 Next, the operation of the battery pack 60 will be described with reference to FIG.
As shown in FIG. 5, the top plate 70 is provided with a plurality of steps by providing three or more top portions 71, 72, 73. For this reason, the distance between the 1st continuous connection part 74 and the 2nd continuous connection part 77 which support each top part 71,72,73 can be made small, and the intensity | strength of the top plate 70 improves. Therefore, even if the respective collecting portions 51 and 52 are provided in the housing 11 in an exposed state, damage to the respective collecting portions 51 and 52 can be suppressed. Further, when vibration or impact is applied to the top plate 70, the vibration or impact is applied to the protruding portion 81 of the third side plate 65 and the protruding portion 82 of the fourth side plate 66. Can be relaxed.
　したがって、第２実施形態によれば、第１実施形態の（１），（２）の効果に加えて、以下のような効果を得ることができる。
　（３）突出部８１，８２によって天板７０への振動や衝撃が緩和されるため、各集合部５１，５２の破損を抑制することができる。 Therefore, according to the second embodiment, in addition to the effects (1) and (2) of the first embodiment, the following effects can be obtained.
(3) Since vibrations and impacts on the top plate 70 are alleviated by the protrusions 81 and 82, damage to the collective portions 51 and 52 can be suppressed.
　上記各実施形態は、以下のように変更してもよい。
　・コネクタ２５を、側板など連設部２３以外の部分に設けてもよい。
　・各電池モジュール３０の電池セル３３を、並列に接続してもよい。 Each of the above embodiments may be modified as follows.
-You may provide the connector 25 in parts other than the connection part 23, such as a side plate.
-You may connect the battery cell 33 of each battery module 30 in parallel.
　・第２実施形態において、各集合部５１，５２を、第２天部７２と第２連設部７７とにより囲まれる領域に設けてもよい。この場合、第１対向部が第３天部７３、第２対向部が第２天部７２として、それぞれ機能する。 In the second embodiment, each of the collecting portions 51 and 52 may be provided in a region surrounded by the second top portion 72 and the second connecting portion 77. In this case, the first facing portion functions as the third top portion 73 and the second facing portion functions as the second top portion 72.
　・第１実施形態において、第１天部２１は、傾斜してなくてもよく、底板１３と平行であってもよい。同様に、第２実施形態の第３天部７３も、底板６２と平行であってもよい。 In the first embodiment, the first top portion 21 may not be inclined and may be parallel to the bottom plate 13. Similarly, the third top portion 73 of the second embodiment may be parallel to the bottom plate 62.
　・天板１７，７０に第１対向部と第２対向部とが設けられていれば、ハウジングはどのような形状であってもよい。 As long as the first and second facing portions are provided on the top plates 17 and 70, the housing may have any shape.

Claims (3)

  1. 電池セルを有する複数の電池モジュールと、
    　前記複数の電池モジュールのそれぞれに接続された複数のハーネスと、
    　前記電池モジュールよりも鉛直方向の上方に配置されるとともに、前記複数のハーネス同士を接続する集合部と、
    　前記電池モジュール、前記ハーネス及び前記集合部が収容されるハウジングとを備え、
    　前記ハウジングは、
    　底板と、
    　前記底板の周縁から立設された側板と、
    　前記底板と対向して配置されるとともに、前記側板により囲まれる空間を覆う天板とを有し、
    　前記天板は、
    　第１対向部と、
    　前記底板との対向方向に前記第１対向部より離間した第２対向部と、
    　前記第１対向部と前記第２対向部とを繋ぐ壁部とを有し、
    　前記集合部は、前記ハウジング内に露出した状態で、前記壁部と前記第２対向部とにより囲まれる領域に配置されている電池パック。     A plurality of battery modules having battery cells;
    A plurality of harnesses connected to each of the plurality of battery modules;
    The battery unit is disposed above the battery module in the vertical direction, and the assembly unit connects the plurality of harnesses.
    A housing for housing the battery module, the harness, and the collecting portion;
    The housing is
    The bottom plate,
    A side plate erected from the periphery of the bottom plate;
    A top plate that is disposed opposite to the bottom plate and covers a space surrounded by the side plate,
    The top plate is
    A first facing portion;
    A second facing portion spaced from the first facing portion in a direction facing the bottom plate;
    A wall portion connecting the first facing portion and the second facing portion;
    The assembly portion is a battery pack disposed in a region surrounded by the wall portion and the second facing portion in a state of being exposed in the housing.
  2. 請求項１に記載の電池パックにおいて、
    　前記側板は、前記天板に沿って前記壁部から突出する突出部を有する、電池パック。     The battery pack according to claim 1,
    The said side plate is a battery pack which has a protrusion part which protrudes from the said wall part along the said top plate.
  3. 請求項１又は請求項２に記載の電池パックにおいて、
    　前記壁部には、前記電池モジュールと前記ハウジング外に設けられた外部機器とを接続するコネクタが設けられている、電池パック。     The battery pack according to claim 1 or 2,
    A battery pack, wherein the wall portion is provided with a connector for connecting the battery module and an external device provided outside the housing.
PCT/JP2015/073030 2014-09-05 2015-08-17 Battery pack WO2016035537A1 (en)

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