WO2018155081A1 - Module de batterie - Google Patents

Module de batterie Download PDF

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Publication number
WO2018155081A1
WO2018155081A1 PCT/JP2018/002629 JP2018002629W WO2018155081A1 WO 2018155081 A1 WO2018155081 A1 WO 2018155081A1 JP 2018002629 W JP2018002629 W JP 2018002629W WO 2018155081 A1 WO2018155081 A1 WO 2018155081A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
battery module
plate
side plate
convex
Prior art date
Application number
PCT/JP2018/002629
Other languages
English (en)
Japanese (ja)
Inventor
修 久保田
和則 小島
貴支 鈴木
祥隆 綿引
青木　定之
Original Assignee
日立オートモティブシステムズ株式会社
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 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Priority to JP2019501154A priority Critical patent/JP6876119B2/ja
Publication of WO2018155081A1 publication Critical patent/WO2018155081A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—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
    • 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 module configured by connecting a plurality of rechargeable secondary batteries.
  • Patent Document 1 discloses a battery module to which a flat plate-like side plate is applied.
  • the battery module disclosed in Patent Document 1 has a configuration in which flat plate-like side plates with holes are fastened with bolts to flat plate-like end plates arranged at both ends in the battery stacking direction. This is effective for high-density mounting because the side plate and end plate for restraining the substrate are not bulky.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a battery module having improved vibration resistance.
  • the present invention includes a battery group in which a plurality of batteries each having an upper surface, a lower surface, and a side surface are stacked, and a pair of side plates disposed to face the side surfaces of the battery group.
  • the battery module there is provided a battery module characterized in that the side plate has a convex portion and includes a deformation suppressing portion that suppresses deformation of the convex portion along the convex portion.
  • the present invention it is possible to improve the rigidity of the side plate by providing the convex portions on the side plate, and it is possible to improve the vibration resistance of the battery module against the vibration in the direction perpendicular to the stacking direction of the battery modules.
  • FIG. 1 is an external perspective view of the battery module according to the first embodiment of the present invention. Note that the definition of direction means up, down, left, and right in the lower left of each figure unless otherwise specified.
  • FIG. 2 is an exploded external perspective view of the battery module of FIG. However, a part of the configuration is omitted in FIG.
  • a battery module 100 shown in FIG. 1 sandwiches a battery stack 1 in which a plurality of battery cells 8 are stacked between a pair of end holders 2 and an end plate 3 that is a pair of plate-like members. These are integrated, and a power line between the batteries is formed by the intermediate bus bar 5, and a power line between the assembled battery and the outside is formed by the end bus bar 6 and the external terminal cable 7.
  • the battery stack 1 will be described with reference to FIGS. 1 and 2.
  • the battery stack 1 includes a plurality of single cells 8 and a plurality of intermediate holders 9.
  • Each unit cell has a flat rectangular parallelepiped shape and has a pair of wide surfaces.
  • the plurality of unit cells constituting the battery stack are stacked so that the wide surfaces of the adjacent unit cells 5 face each other.
  • Adjacent single cells are arranged with their directions reversed so that the positions of the positive terminal and the negative terminal provided on the battery lid are reversed.
  • the positive electrode terminal 81 and the negative electrode terminal 82 of each adjacent unit cell 8 are electrically connected to each other by an intermediate bus bar 5 which is a metal plate-like conductive member.
  • the plurality of single cells 8 constituting the battery module 100 according to the present embodiment are electrically connected in series. Further, the end bus bar 6 is provided on the positive terminal 81 or the negative terminal 82 of the unit cell 8 at both ends of the battery stack 1. The end bus bar 6 is electrically connected to the external terminal cable 7 so that power can be taken out of the battery module.
  • the unit cell 8 includes a rectangular battery container 88 including a battery can 88a and a battery lid 88b.
  • the material of the battery can 88a and the battery cover 88b is, for example, aluminum or an aluminum alloy.
  • the battery can 88a has a rectangular box shape having two large-area surfaces (wide surface 88a1), two small-area surfaces (narrow side surface 88a2), one bottom plate 88a3, and an opening.
  • the battery lid 88b has a rectangular flat plate shape and is laser-welded so as to close the opening of the battery can. That is, the battery cover 88b seals the battery can 88a.
  • a rectangular battery container 88 including a battery lid 88b and a battery can 88a has a hollow rectangular parallelepiped shape.
  • the battery lid 88b is provided with a positive electrode terminal 81 and a negative electrode terminal 82. Inside the battery container 88, the charge / discharge element is housed in a state covered with an insulating case. The positive electrode of the charge / discharge element is connected to the positive terminal 81, and the negative electrode of the charge / discharge element is connected to the negative terminal 82.
  • the battery lid 88b is provided with a liquid injection hole for injecting the electrolyte into the battery container 88. The liquid injection hole is sealed with a liquid injection plug 83 after the injection of the electrolytic solution.
  • a non-aqueous electrolytic solution in which a lithium salt such as lithium hexafluorophosphate (LiPF6) is dissolved in a carbonic acid ester-based organic solvent such as ethylene carbonate can be used.
  • a gas discharge valve 84 is provided in the battery lid 88b.
  • the gas discharge valve 84 is formed by partially thinning the battery cover 88b by pressing.
  • the gas discharge valve 84 generates heat due to abnormalities such as overcharging of the unit cell and generates gas.
  • the pressure in the battery container 88 rises and reaches a predetermined pressure
  • the gas discharge valve 84 is opened and discharges the gas from the inside. As a result, the pressure in the battery container 88 is reduced.
  • FIG. 3 is a partial perspective view for explaining the positional relationship between the intermediate holder 9, the end holder 2, the unit cell 8 positioned at the end of the battery stack, and the end plate 3.
  • the intermediate holder 9, the end holder 2 and the end plate 3 will be described with reference to FIG.
  • a plurality of intermediate holders 9 are stacked in the front-rear direction of the battery stack 1.
  • the material of the intermediate holder 9 is a resin having insulating properties and heat resistance, such as engineering plastics such as polybutylene terephthalate (PBT) and polycarbonate (PC), rubber, and the like. Since the intermediate holder 9 is interposed between the single cells, insulation between the adjacent single cells 8 is ensured.
  • the intermediate holder 9 has a separating part 9A and a connecting part 9B.
  • the isolation portion 9A faces the wide surface 88a1 of the battery, and prevents the adjacent two wide surfaces 88a1 from contacting each other.
  • the connecting portion 9B has a peak portion and a valley portion, and is used for connecting to an adjacent intermediate holder and an end holder described later.
  • the end holder 2 is disposed between the unit cell 8 and the end plate 3 disposed at the front end of the battery stack, and between the unit cell 8 and the end plate 3 disposed at the rear end. Since the end holder 2 is interposed between the unit cell 8 and the end plate 3, insulation between the end plate and the unit cell 8 is ensured.
  • the end holder 2 disposed at the end of the battery stack 1 has a separating portion 2A, a connecting portion 2B, and a fixing portion 2C.
  • the isolation part 2A faces the wide surface of the unit cell 8 and the end plate 3, and prevents the wide surface of the battery from contacting the end plate.
  • the connecting part 2B has a peak part and a valley part, and is used for connecting to an adjacent intermediate holder.
  • the fixing portion 2C protrudes from the end holder separating portion 2A toward the end plate 3 side.
  • the fixing portion 2C is a portion for fastening and electrically connecting the end bus bar 6 and the external terminal cable 7, and an insert nut 10 is integrated with the fixing portion 2C.
  • the insert nut 10 is used as an example, but a structure in which insert bolts are integrated may be employed.
  • the fixing portion 2C is configured to be inserted into a receiving portion 3A of the end plate 3 described later, and transmits the rotational torque applied to the fixing portion to the end plate when the end bus bar 6 and the external terminal cable 7 are fastened. Thus, the stability of the fixing portion 2C is ensured.
  • Adjacent intermediate holders or intermediate holders and end holders are connected by fitting the connecting portions of the holders. Specifically, the adjacent intermediate holders 9 are connected by fitting the connecting part 9B of the intermediate holder 9 and the connecting part 9B of the adjacent intermediate holder, and the connecting part 9B of the intermediate holder 9 and the end holder 2 are connected. By fitting the part 2B, the intermediate holder 9 and the end holder 2 are connected to each other.
  • the end plate 3 has a rectangular flat plate shape and is formed to have approximately the same size as the unit cell 8.
  • the end plates 3 are disposed on the front and the rear in the stacking direction of the battery stack 1, and sandwich the battery stack 1 via a pair of end holders.
  • the accommodating portion 3A has a shape such that the upper surface of the end plate 3 is recessed, and a part of the recess is opened to the end holder 2 side.
  • the shape of the accommodating portion 3A is substantially the same as that of the fixed portion 2C, and the fixed portion 2C is accommodated in the accommodating portion 3A.
  • the end plate 3 has an end plate fastening portion 3 ⁇ / b> B protruding in the opposite direction to the battery stack 1.
  • the end plate fastening portion 3B has a fastening hole 3C, and a bolt is passed through the fastening hole to fix the end plate 3 to a casing (not shown) of the battery pack.
  • a bolt is passed through the fastening hole to fix the end plate 3 to a casing (not shown) of the battery pack.
  • FIG. 4 shows the shape of the side plate 4 which is a characteristic part of the present invention.
  • the side plates 4 are arranged symmetrically on the left and right sides in the stacking direction of the battery stack 1. Therefore, in FIG. 4, the side plate 4 on one side is taken out and described.
  • the side plate 4 is physically connected to the pair of end plates 3 by bolts 11.
  • the side plate 4 is manufactured using a metal plate such as a stainless plate or a steel plate having a predetermined thickness.
  • the side plate 4 does not have a flat plate shape, but has a convex portion 4A protruding in the thickness direction (right direction) of the side plate.
  • 4 A of convex parts are formed from the end of the side plate 4 along the longitudinal direction of a battery module, ie, the lamination direction (front-back direction) of a battery.
  • the convex portions can be formed by various methods. For example, in the side plate 4 shown in FIG. 4, the convex portions 4A are formed by bending or drawing a single plate.
  • the fastening hole 4B for connecting the side plate 4 to the end plate 3 is limited in position to avoid interference between the convex portion 4A and the bolt, and between the convex portion 4A and the side plate end portion, or the convex portion 4A. It is provided on the top.
  • the protrusion 4A can improve the vibration resistance of the side plate against vibration in the direction (left-right direction) perpendicular to the longitudinal direction of the battery module 100. Further, a flat plate portion 4C is formed in a region sandwiching the convex portion 4A, and deformation of the side plate due to the formation of the convex portion can be suppressed by this flat plate portion. If the flat portion 4C is not provided and the side plate 4 is formed in a continuous concave-convex shape (bellows shape), the rigidity in the left-right direction is lowered, and as described above, it becomes weak against left-right vibration. In the present embodiment, since the pair of flat portions 4C are provided so as to sandwich the convex portion, it is strong against vibration in the left-right direction.
  • the flat portion 4C does not have to be a perfect flat shape as compared with the convex portion 4A. However, since the flat portion 4C is more resistant to vibration from various directions, more vibration in the left-right direction is generated. It is preferable in terms of suppression.
  • the battery stack 1 is attached to the end holder 2 with the end holder 2 in contact with the front and rear in the stacking direction of the battery stack 1.
  • the pair of side plates 4 are then screwed to the end plate 3 with bolts 11.
  • the side plate 4 is screwed to the end plate 3 with bolts 11
  • the battery stack and the end cell holder sandwiched between the pair of end plates are held in a compressed state by a predetermined amount.
  • the method of fixing the side plate to the end plate using bolts has been described.
  • the side plate may be fixed to the end plate using rivets, caulking, welding, or the like. .
  • FIG. 5 shows the side plate 12 of the first modification. This modification is different from the side plate 12 of the first embodiment in that a plurality of convex portions are provided.
  • the side plate 12 shown in FIG. 5 includes a plurality of convex portions 12A.
  • the earthquake resistance of a side plate can be improved by increasing the number of convex parts.
  • FIG. 6 shows a side plate 12 of a second modification.
  • This modification is different from the side plate 12 of the first embodiment in that a plurality of protrusions are provided and the outer periphery of each protrusion is surrounded by a flat part 13.
  • the side plate 13 of FIG. 6 includes the flat plate portions 13D at both ends in the longitudinal direction (both ends in the front-rear direction) in addition to the flat plate portions 13C formed along the longitudinal direction (along the front-rear direction). .
  • transformation of the side plate by forming a convex part can further be suppressed.
  • the flat portion 13D continuously connects the convex portions 13A, the structure becomes stronger against twisting in the vertical direction than in the first embodiment.
  • the fastening holes 13B for connecting the side plates 13 to the end plates 3 by providing the flat plate portions 13D at both ends in the longitudinal direction are not limited in position, and can be provided at arbitrary places. As a result, the degree of design freedom is improved.
  • FIG. 7 shows a side plate 14 of Modification 3. This modification is different from the side plate of the first embodiment in that the convex portion is arranged on the upper side of the side plate 14.
  • the side plate 14 of FIG. 7 includes the convex portion 14A at a position biased toward the upper surface of the battery module. For this reason, the upper flat portion 14C1 having a narrower width than the lower flat portion 14C2 is provided. Since the bottom surface of the battery module 100 of the present embodiment is fixed to the casing of the battery pack, when vibration is applied to the battery module, the top surface is more likely to vibrate than the bottom surface. Therefore, the vibration resistance can be improved more efficiently by biasing the convex portion toward the upper surface as shown in FIG.
  • FIG. 8 shows a side plate 15 of the fourth modification. This modification is different from the side plate of the first embodiment in that the convex portion is made of a separate member.
  • the side plate 15 of FIG. 8 has a configuration in which the convex portion 15A made of another member is integrated with the flat plate portion 15C.
  • the material of the convex portion 15A is not limited and can be made of metal or resin.
  • the convex portion is a metal, for example, it can be integrated with the flat plate portion 15C by welding, and when the convex portion is a resin, for example, it can be integrated with the flat plate portion 15C by an adhesive.
  • the convex part By making the convex part a separate member, the shape of the convex part and the position of the convex part can be freely designed rather than producing the convex part by bending or drawing. The present invention will be briefly described above.
  • the battery module 100 includes a battery group (1) in which a plurality of batteries having an upper surface (88b), a lower surface (88a3) and side surfaces (88a1, 88a2) are stacked, and a side surface of the battery group (1).
  • a pair of side plates (4) arranged opposite to each other, the side plate (4) has a convex portion (4A), and suppresses deformation of the convex portion (4A) along the convex portion (4A).
  • the deformation suppressing portion (4C, 12C, 13C, 14C, 15C) is provided, and the deformation suppressing portion (4C, 12C, 13C, 14C, 15C) is provided in a pair of regions sandwiching the convex portion (4A). To do. By adopting such a configuration, the vibration suppressing effect in the left-right direction is improved.
  • the deformation suppressing portion is a flat plate portion (4C, 12C, 13C, 14C, 15C) as an example.
  • the battery module 100 has a pair of flat plate portions (4C, 12C, 13C, 14C, 15C) and convex portions in a direction from the upper surface to the lower surface of the battery.
  • a pair of flat plate portions (4C) and convex portions are arranged in the direction from the front to the rear of the battery.
  • the bottom surface of the battery module 100 is the housing of the battery pack.
  • left and right vibration suppression is more important, so a pair of flat plate portions (4C, 12C, 13C, 14C, 15C) and convex portions are arranged in the direction from the upper surface to the lower surface of the battery.
  • the structure is preferable.
  • the battery module 100 according to the present invention has a configuration in which the width of the flat plate portion (14C1) on the upper surface side is narrower than the width of the flat plate portion (14C2) on the lower surface side. Since the bottom surface of the battery module 100 is fixed to the casing of the battery pack, when vibration is applied to the battery module, the top surface is more likely to vibrate than the bottom surface. Therefore, the vibration resistance can be improved more efficiently by biasing the convex portion to the upper surface in this way.
  • the battery module 100 according to the present invention is characterized in that the convex portions (12A, 13A) are composed of a plurality of convex portions.
  • the rigidity of the side plate is improved and the vibration resistance is improved.
  • the side plate can be provided with a convex portion, whereby the rigidity of the side plate can be improved, and the vibration resistance of the battery module can be improved against vibration in a direction perpendicular to the stacking direction of the battery modules.
  • the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.
  • the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.
  • a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un module de batterie qui présente une résistance aux vibrations améliorée. Ce module de batterie comprend : un groupe de batteries obtenu par empilement d'une pluralité de batteries, chacune ayant une surface supérieure, une surface inférieure et des surfaces latérales ; et une paire de plaques latérales disposées de façon à faire face aux surfaces latérales du groupe de batteries. Le module de batterie est caractérisé en ce que les plaques latérales comportent des saillies, et des parties d'inhibition de déformation pour inhiber la déformation des saillies sont disposées le long des saillies.
PCT/JP2018/002629 2017-02-24 2018-01-29 Module de batterie WO2018155081A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019501154A JP6876119B2 (ja) 2017-02-24 2018-01-29 電池モジュール

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017032809 2017-02-24
JP2017-032809 2017-02-24

Publications (1)

Publication Number Publication Date
WO2018155081A1 true WO2018155081A1 (fr) 2018-08-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/002629 WO2018155081A1 (fr) 2017-02-24 2018-01-29 Module de batterie

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JP (1) JP6876119B2 (fr)
WO (1) WO2018155081A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT521473B1 (de) * 2018-10-09 2020-02-15 Avl List Gmbh Batteriemodul
JP2021106109A (ja) * 2019-12-26 2021-07-26 トヨタ自動車株式会社 組電池および電池ホルダー

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001236937A (ja) * 1999-12-15 2001-08-31 Toyota Motor Corp 電池パック
WO2014203342A1 (fr) * 2013-06-19 2014-12-24 日立オートモティブシステムズ株式会社 Module de batterie
JP2015225700A (ja) * 2014-05-26 2015-12-14 本田技研工業株式会社 蓄電装置
JP2017084467A (ja) * 2015-10-22 2017-05-18 日産自動車株式会社 組電池

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001236937A (ja) * 1999-12-15 2001-08-31 Toyota Motor Corp 電池パック
WO2014203342A1 (fr) * 2013-06-19 2014-12-24 日立オートモティブシステムズ株式会社 Module de batterie
JP2015225700A (ja) * 2014-05-26 2015-12-14 本田技研工業株式会社 蓄電装置
JP2017084467A (ja) * 2015-10-22 2017-05-18 日産自動車株式会社 組電池

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT521473B1 (de) * 2018-10-09 2020-02-15 Avl List Gmbh Batteriemodul
AT521473A4 (de) * 2018-10-09 2020-02-15 Avl List Gmbh Batteriemodul
JP2021106109A (ja) * 2019-12-26 2021-07-26 トヨタ自動車株式会社 組電池および電池ホルダー
JP7333001B2 (ja) 2019-12-26 2023-08-24 トヨタ自動車株式会社 組電池および電池ホルダー
US11749862B2 (en) 2019-12-26 2023-09-05 Toyota Jidosha Kabushiki Kaisha Battery pack and battery holder

Also Published As

Publication number Publication date
JP6876119B2 (ja) 2021-05-26
JPWO2018155081A1 (ja) 2019-06-27

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