JP2015210894A - Battery pack module - Google Patents
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- JP2015210894A JP2015210894A JP2014090695A JP2014090695A JP2015210894A JP 2015210894 A JP2015210894 A JP 2015210894A JP 2014090695 A JP2014090695 A JP 2014090695A JP 2014090695 A JP2014090695 A JP 2014090695A JP 2015210894 A JP2015210894 A JP 2015210894A
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- 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
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Abstract
Description
本発明の実施形態は、組電池モジュールに関する。 Embodiments described herein relate generally to an assembled battery module.
従来、複数の二次電池と、冷媒が流通する流路が設けられた冷却プレートとを備え、複数の二次電池が配列される組電池の冷却面に冷却プレートを接触させる組電池モジュールがある。このような組電池モジュールにおいては、複数の異なる冷却形態を組み合わせることによって、複数の二次電池を迅速かつ適正に冷却することが望まれている。しかしながら、複数の異なる冷却形態の構成を備える際に組電池モジュールの構成が大型化する場合がある。 2. Description of the Related Art Conventionally, there is an assembled battery module that includes a plurality of secondary batteries and a cooling plate provided with a flow path through which a refrigerant flows, and that contacts the cooling plate with the cooling surface of the assembled battery in which the plurality of secondary batteries are arranged. . In such an assembled battery module, it is desired to cool a plurality of secondary batteries quickly and appropriately by combining a plurality of different cooling modes. However, the configuration of the assembled battery module may increase in size when the configuration of a plurality of different cooling modes is provided.
本発明が解決しようとする課題は、大型化を抑制しつつ、複数の異なる冷却形態の組み合わせによって複数の二次電池を迅速かつ適正に冷却することができる組電池モジュールを提供することである。 The problem to be solved by the present invention is to provide an assembled battery module capable of quickly and appropriately cooling a plurality of secondary batteries by combining a plurality of different cooling modes while suppressing an increase in size.
実施形態の組電池モジュールは、冷却器と、複数の二次電池と、非導電性の筐体と、複数の熱伝導プレートと、第１絶縁部材と、第２絶縁部材とを持つ。冷却器は、液体冷媒の流路が設けられた金属から成る。複数の二次電池は、冷却器の厚さ方向の両側において厚さ方向に直交する方向に積層され、底面を冷却器に対向させるように配置される。非導電性の筐体は、複数の二次電池および冷却器を収容する。複数の熱伝導プレートは、複数の二次電池の各々における表面の少なくとも一部を覆うとともに冷却器に接触する金属から成る。第１絶縁部材は、複数の二次電池の隣り合う二次電池の間を電気的に絶縁する。第２絶縁部材は、複数の二次電池の各々と前記冷却器との間を電気的に絶縁する。複数の二次電池の隣り合う二次電池は、第１空隙を形成するように前記熱伝導プレートを介在させて離間して配置される。複数の二次電池の各々と筐体とは、第２空隙を形成するように前記熱伝導プレートを介在させて離間して配置される。 The assembled battery module of the embodiment includes a cooler, a plurality of secondary batteries, a non-conductive casing, a plurality of heat conductive plates, a first insulating member, and a second insulating member. The cooler is made of a metal provided with a flow path for liquid refrigerant. The plurality of secondary batteries are stacked in a direction orthogonal to the thickness direction on both sides of the thickness direction of the cooler, and are arranged so that the bottom faces the cooler. The nonconductive housing accommodates a plurality of secondary batteries and a cooler. The plurality of heat conduction plates are made of a metal that covers at least part of the surface of each of the plurality of secondary batteries and contacts the cooler. The first insulating member electrically insulates adjacent secondary batteries of the plurality of secondary batteries. The second insulating member electrically insulates between each of the plurality of secondary batteries and the cooler. Adjacent secondary batteries of the plurality of secondary batteries are spaced apart with the heat conducting plate interposed so as to form a first gap. Each of the plurality of secondary batteries and the housing are disposed apart from each other with the heat conducting plate interposed so as to form a second gap.
以下、実施形態の組電池モジュールを、図面を参照して説明する。 Hereinafter, an assembled battery module according to an embodiment will be described with reference to the drawings.
実施形態の組電池モジュール１０は、図１から図７に示すように、複数の二次電池１１と、複数の第１熱伝導プレート１２および第２熱伝導プレート１３と、複数の第１絶縁部材１４と、冷却器１５と、１対の第２絶縁部材１６とを備えている。さらに、組電池モジュール１０は、筐体１７と、１対の端子カバー１８と、複数のバスバー１９と、２つの第１固定部材２０と、２つの第２固定部材２１とを備えている。 As shown in FIGS. 1 to 7, the assembled battery module 10 according to the embodiment includes a plurality of secondary batteries 11, a plurality of first heat conduction plates 12 and a second heat conduction plate 13, and a plurality of first insulating members. 14, a cooler 15, and a pair of second insulating members 16. The assembled battery module 10 further includes a housing 17, a pair of terminal covers 18, a plurality of bus bars 19, two first fixing members 20, and two second fixing members 21.
複数の二次電池１１の各々は、例えば、リチウムイオン電池などの非水電解質二次電池である。各二次電池１１は、外装容器３１と、外装容器３１内に非水電解液と共に収納された電極体（図示略）と、を備えている。外装容器３１の外形は、図２に示すように、扁平な略直方体形状に形成されている。外装容器３１は、アルミニウムまたはアルミニウム合金などの熱伝導性（熱伝導率）が高い材料により形成されている。各二次電池１１は、電極体の正極に接続された正極端子３２および負極に接続された負極端子３３を、例えば合成樹脂やガラスなどの絶縁体から成るガスケット３４を介して、端子面３５の長手方向両端部の各々に備えている。
複数の二次電池１１は、後述する板状の冷却器１５の厚さ方向の両側において、隣り合う二次電池１１の互いの長側面３６ａを対向させるように積層された状態で配置されている。各二次電池１１は、外装容器３１の側面３６を成す各１対の幅の広い長側面３６ａおよび幅の狭い短側面３６ｂを備えている。
Each of the secondary batteries 11 is a nonaqueous electrolyte secondary battery such as a lithium ion battery, for example. Each secondary battery 11 includes an outer container 31 and an electrode body (not shown) housed in the outer container 31 together with a nonaqueous electrolytic solution. As shown in FIG. 2, the outer shape of the outer container 31 is formed in a flat, substantially rectangular parallelepiped shape. The outer container 31 is formed of a material having high thermal conductivity (thermal conductivity) such as aluminum or an aluminum alloy. Each secondary battery 11 has a positive electrode terminal 32 connected to the positive electrode of the electrode body and a negative electrode terminal 33 connected to the negative electrode connected to the terminal surface 35 via a gasket 34 made of an insulating material such as synthetic resin or glass. It is provided at each of both ends in the longitudinal direction.
The plurality of secondary batteries 11 are arranged in a stacked state on both sides in the thickness direction of a plate-like cooler 15 to be described later so that the long side surfaces 36a of the adjacent secondary batteries 11 face each other. . Each secondary battery 11 includes a pair of wide long side surfaces 36 a and a narrow short side surface 36 b that form the side surfaces 36 of the outer casing 31.
複数の第１熱伝導プレート１２および第２熱伝導プレート１３の各々の外形は、図３〜図６に示すように、Ｌ字型板状に形成されている。第１熱伝導プレート１２および第２熱伝導プレート１３の各々は、銅などの導電性および熱伝導性が高い材料により形成されている。第１熱伝導プレート１２および第２熱伝導プレート１３の各々は、例えば、板状金属の曲げ成形などによって形成されている。
複数の二次電池１１のうち積層方向の両端の二次電池１１は、図３、図５、および図６に示すように、外装容器３１の底面３７と１対の長側面３６ａの一部とを覆うように装着される第１熱伝導プレート１２および第２熱伝導プレート１３を備えている。第１熱伝導プレート１２および第２熱伝導プレート１３のうち第１熱伝導プレート１２は第２熱伝導プレート１３よりも積層方向の端部側に配置されている。複数の二次電池１１のうち積層方向の両端以外の二次電池１１は、図４および図６に示すように、外装容器３１の底面３７と１対の長側面３６ａの一部とを覆うように装着される１対の第２熱伝導プレート１３を備えている。第１熱伝導プレート１２および第２熱伝導プレート１３の各々は、各外装容器３１の長側面３６ａの一部として、底面３７から端子面３５に向かう高さ方向における底面３７側の所定領域（例えば、高さ方向の中央部から底面３７側の領域など）を覆う。
各外装容器３１の底面３７側において、第１熱伝導プレート１２および第２熱伝導プレート１３の各々の底面部１２ａ，１３ａと、第２熱伝導プレート１３の底面部１３ａとの間には、隙間などを埋めるようにしてグリース（図示略）が塗布されている。このグリースは、例えば、熱伝導性および導電性を有するシリコン樹脂などである。
As shown in FIGS. 3 to 6, the outer shape of each of the plurality of first heat conductive plates 12 and the second heat conductive plates 13 is formed in an L-shaped plate shape. Each of the first heat conductive plate 12 and the second heat conductive plate 13 is made of a material having high conductivity and heat conductivity such as copper. Each of the first heat conductive plate 12 and the second heat conductive plate 13 is formed by, for example, bending a plate metal.
As shown in FIGS. 3, 5, and 6, the secondary batteries 11 at both ends in the stacking direction among the plurality of secondary batteries 11 include a bottom surface 37 of the outer container 31 and a part of the pair of long side surfaces 36 a. The 1st heat conduction plate 12 and the 2nd heat conduction plate 13 with which it is mounted are covered. Of the first heat conduction plate 12 and the second heat conduction plate 13, the first heat conduction plate 12 is disposed on the end side in the stacking direction with respect to the second heat conduction plate 13. As shown in FIGS. 4 and 6, the secondary batteries 11 other than both ends in the stacking direction among the plurality of secondary batteries 11 cover the bottom surface 37 of the outer container 31 and a part of the pair of long side surfaces 36a. A pair of second heat conduction plates 13 are provided. Each of the first heat conductive plate 12 and the second heat conductive plate 13 is a predetermined region on the bottom surface 37 side in the height direction from the bottom surface 37 toward the terminal surface 35 as a part of the long side surface 36a of each outer casing 31 (for example, , A region on the bottom surface 37 side from the center in the height direction).
On the bottom surface 37 side of each exterior container 31, there is a gap between the bottom surface portions 12 a and 13 a of the first heat conductive plate 12 and the second heat conductive plate 13 and the bottom surface portion 13 a of the second heat conductive plate 13. Grease (not shown) is applied so as to fill the surface. This grease is, for example, a silicon resin having thermal conductivity and conductivity.
第１熱伝導プレート１２は、外装容器３１の底面３７に対向する底面部１２ａに底面３７を押圧する複数の第１板ばね部４１を備えている。第１板ばね部４１は、例えば、底面部１２ａの一部に設けられる切り欠き４１ａによって形成されている。第１熱伝導プレート１２は、外装容器３１の長側面３６ａに対向する側面部１２ｂに長側面３６ａを押圧する複数の第２板ばね部４２を備えている。第２板ばね部４２は、例えば、側面部１２ｂの一部に設けられる切り欠き４２ａによって形成されている。
第２熱伝導プレート１３は、外装容器３１の底面３７に対向する底面部１３ａに、底面３７を押圧する複数の第３板ばね部４３を備えている。第３板ばね部４３は、例えば、底面部１３ａの一部に設けられる切り欠き４３ａによって形成されている。
The first heat conductive plate 12 includes a plurality of first leaf spring portions 41 that press the bottom surface 37 against the bottom surface portion 12 a facing the bottom surface 37 of the outer container 31. The 1st leaf | plate spring part 41 is formed of the notch 41a provided in a part of bottom face part 12a, for example. The first heat conducting plate 12 includes a plurality of second leaf spring portions 42 that press the long side surface 36 a against the side surface portion 12 b facing the long side surface 36 a of the outer container 31. The 2nd leaf | plate spring part 42 is formed of the notch 42a provided in a part of side part 12b, for example.
The second heat conducting plate 13 includes a plurality of third leaf spring portions 43 that press the bottom surface 37 on the bottom surface portion 13 a facing the bottom surface 37 of the outer container 31. The 3rd leaf | plate spring part 43 is formed of the notch 43a provided in a part of bottom face part 13a, for example.
複数の第１絶縁部材１４の各々の外形は、図７に示すように、板状に形成されている。第１絶縁部材１４は、例えばポリカーボネートなどの樹脂のように非導電性の材料によって形成されている。第１絶縁部材１４は、複数の二次電池１１の積層方向で隣り合う二次電池１１の互いの第２熱伝導プレート１３の間に挟み込まれている。第１絶縁部材１４は、各外装容器３１の長手方向に長側面３６ａと同等の長さを有するとともに、各外装容器３１の高さ方向に長側面３６ａと同等または僅かに小さな長さを有している。第１絶縁部材１４は、各外装容器３１の高さ方向において、外装容器３１の長側面３６ａに対向する第２熱伝導プレート１３の側面部１３ｂよりも長く形成されている。例えば、第２熱伝導プレート１３の側面部１３ｂが外装容器３１の高さ方向に底面３７から中央部に亘る長さを有している場合に、第１絶縁部材１４は、外装容器３１の高さ方向に底面３７から中央部よりも端子面３５側の部位に亘る長さを有している。積層方向で隣り合う二次電池１１は、図２に示すように、互いの第２熱伝導プレート１３の側面部１３ｂを接触させた状態で、各外装容器３１の高さ方向における端子面３５側の領域において、各長側面３６ａと第１絶縁部材１４との間に第１空隙５１を形成している。 The outer shape of each of the plurality of first insulating members 14 is formed in a plate shape as shown in FIG. The first insulating member 14 is formed of a nonconductive material such as a resin such as polycarbonate. The first insulating member 14 is sandwiched between the second heat conductive plates 13 of the secondary batteries 11 adjacent in the stacking direction of the plurality of secondary batteries 11. The first insulating member 14 has a length equivalent to the long side surface 36a in the longitudinal direction of each exterior container 31, and has a length equivalent to or slightly smaller than the long side surface 36a in the height direction of each exterior container 31. ing. The first insulating member 14 is formed longer than the side surface portion 13 b of the second heat conducting plate 13 facing the long side surface 36 a of the outer container 31 in the height direction of each outer container 31. For example, when the side surface portion 13 b of the second heat conducting plate 13 has a length extending from the bottom surface 37 to the center portion in the height direction of the outer container 31, the first insulating member 14 has a height of the outer container 31. It has a length extending from the bottom surface 37 to the portion closer to the terminal surface 35 than the center in the vertical direction. As shown in FIG. 2, the secondary batteries 11 adjacent in the stacking direction are in contact with the side surface portions 13 b of the second heat conduction plates 13, and the terminal surface 35 side in the height direction of each outer container 31. In the region, a first gap 51 is formed between each long side surface 36 a and the first insulating member 14.
冷却器１５の外形は、図２および図８に示すように、板状に形成されている。冷却器１５は、例えばアルミニウムまたは銅などの熱伝導性が高い金属によって形成されている。冷却器１５は、水などの液体冷媒を流通させる複数の冷媒流路５２を内部に備えている。複数の冷媒流路５２は、複数の二次電池１１の積層方向における複数の異なる位置において、冷却器１５の厚さ方向および複数の二次電池１１の積層方向に直交する方向（つまり、各二次電池１１の長手方向）に冷却器１５の内部を貫通するように形成されている。複数の冷媒流路５２は、冷却器１５に設定される積層方向の単位領域の位置が冷却器１５の端部１５ａから中央部１５ｂに向かい変化することに伴って、単位領域あたりに含まれる冷媒流路５２の流路断面積が増大傾向に変化するように設定されている。例えば図２に示す冷却器１５は、積層方向における二次電池１１の積層数と同数の冷媒流路５２を備えている。これらの冷媒流路５２の各々は、複数の二次電池１１の積層方向における位置が冷却器１５の端部１５ａから中央部１５ｂに向かい変化することに伴い、流路断面積が増大傾向に変化するように形成されている。 The outer shape of the cooler 15 is formed in a plate shape as shown in FIGS. The cooler 15 is made of a metal having high thermal conductivity such as aluminum or copper. The cooler 15 includes a plurality of refrigerant flow paths 52 through which a liquid refrigerant such as water flows. The plurality of refrigerant flow paths 52 are in a direction orthogonal to the thickness direction of the cooler 15 and the stacking direction of the plurality of secondary batteries 11 (that is, each of the two secondary batteries 11 at a plurality of different positions in the stacking direction of the plurality of secondary batteries 11. It is formed so as to penetrate the inside of the cooler 15 in the longitudinal direction of the secondary battery 11. The plurality of refrigerant flow paths 52 are refrigerants included per unit area as the position of the unit area in the stacking direction set in the cooler 15 changes from the end 15a of the cooler 15 toward the central part 15b. The channel cross-sectional area of the channel 52 is set so as to change in an increasing tendency. For example, the cooler 15 illustrated in FIG. 2 includes the same number of refrigerant flow paths 52 as the number of stacked secondary batteries 11 in the stacking direction. Each of these refrigerant flow paths 52 changes in the cross-sectional area of the flow path in an increasing trend as the position of the plurality of secondary batteries 11 in the stacking direction changes from the end 15a of the cooler 15 toward the center 15b. It is formed to do.
冷却器１５は、厚さ方向の両側の表面を被覆する非導電性の第２絶縁部材１６を備えている。第２絶縁部材１６は、例えば非導電性の樹脂製シートなどであり、冷却器１５と複数の二次電池１１の各々とを電気的に絶縁する。冷却器１５の厚さ方向の両側に配置される複数の二次電池１１の各々は、外装容器３１の底面３７を冷却器１５の厚さ方向で冷却器１５の表面に対向させ、第１および第２熱伝導プレート１２，１３の各々の底面部１２ａ，１３ａを第２絶縁部材１６に接触させている。冷却器１５は、例えば、複数の冷媒流路５２の各々を、冷却器１５の厚さ方向で対向する二次電池１１の互いの底面３７の間に配置している。
冷却器１５は、複数の二次電池１１の積層方向における２つの端部１５ａに、後述する第２固定部材２１を固定するためのボルト装着孔１５ｃを備えている。
The cooler 15 includes a non-conductive second insulating member 16 that covers the surfaces on both sides in the thickness direction. The second insulating member 16 is a non-conductive resin sheet, for example, and electrically insulates the cooler 15 and each of the plurality of secondary batteries 11. Each of the plurality of secondary batteries 11 disposed on both sides of the cooler 15 in the thickness direction has the bottom surface 37 of the outer container 31 opposed to the surface of the cooler 15 in the thickness direction of the cooler 15, The bottom surface portions 12 a and 13 a of the second heat conductive plates 12 and 13 are in contact with the second insulating member 16. In the cooler 15, for example, each of the plurality of refrigerant flow paths 52 is disposed between the bottom surfaces 37 of the secondary batteries 11 that face each other in the thickness direction of the cooler 15.
The cooler 15 includes bolt mounting holes 15 c for fixing a second fixing member 21 described later at two end portions 15 a in the stacking direction of the plurality of secondary batteries 11.
筐体１７は、樹脂などの非導電性の材料により形成されている。筐体１７は、図１および図９に示すように、複数の二次電池１１の各々の高さ方向に平行とされる複数の二次電池１１の挿入方向の両端に開口部１７ａを備えている。
筐体１７は、内部に収容した複数の二次電池１１の各々の長手方向で対向する１対の第１壁部１７ｂと、内部に収容した複数の二次電池１１の各々の短手方向（つまり複数の二次電池１１の積層方向）で対向する１対の第２壁部１７ｃとを備えている。
筐体１７は、後述する図１３に示すように、１対の第２壁部１７ｃと、積層方向の両端の二次電池１１との間で、少なくとも各外装容器３１の高さ方向における端子面３５側の領域において、各長側面３６ａと各第２壁部１７ｃとの間に第２空隙５３を形成している。
The casing 17 is made of a nonconductive material such as resin. As shown in FIGS. 1 and 9, the housing 17 includes openings 17 a at both ends in the insertion direction of the plurality of secondary batteries 11 that are parallel to the height direction of each of the plurality of secondary batteries 11. Yes.
The casing 17 includes a pair of first wall portions 17b that face each other in the longitudinal direction of the plurality of secondary batteries 11 accommodated therein, and a short direction of each of the plurality of secondary batteries 11 accommodated therein ( In other words, a pair of second wall portions 17c facing each other in the stacking direction of the plurality of secondary batteries 11 are provided.
As shown in FIG. 13, which will be described later, the housing 17 is at least a terminal surface in the height direction of each outer container 31 between the pair of second wall portions 17 c and the secondary batteries 11 at both ends in the stacking direction. In the region on the side of 35, a second gap 53 is formed between each long side surface 36a and each second wall portion 17c.
１対の第１壁部１７ｂの各々には、開口部１７ａの周辺で複数の二次電池１１の挿入方向に伸びる複数の貫通孔６１が形成されている。複数の貫通孔６１の各々は、積層方向で隣り合う二次電池１１の間に設けられる第１空隙５１に対して、各二次電池１１の長手方向で臨むように形成されている。複数の貫通孔６１は、例えば、筐体１７の内部に対する吸気または排気によって筐体１７の内部に気体冷媒を流通させるための流通管（図示略）などに接続されている。
１対の第１壁部１７ｂの各々には、複数の二次電池１１の挿入方向の中央部において、冷却器１５の複数の冷媒流路５２に臨んで接続される複数の冷媒入出口６２が形成されている。
１対の第２壁部１７ｃの各々の表面には、後述する第２固定部材２１が装着されるガイド溝６３と、冷却器１５のボルト装着孔１５ｃに臨むボルト挿入孔６４とが形成されている。
Each of the pair of first wall portions 17b is formed with a plurality of through holes 61 extending in the insertion direction of the plurality of secondary batteries 11 around the opening portion 17a. Each of the plurality of through holes 61 is formed so as to face the first gap 51 provided between the secondary batteries 11 adjacent in the stacking direction in the longitudinal direction of each secondary battery 11. The plurality of through holes 61 are connected to, for example, a flow pipe (not shown) for flowing a gaseous refrigerant through the inside of the housing 17 by intake or exhaust to the inside of the housing 17.
Each of the pair of first wall portions 17b has a plurality of refrigerant inlets / outlets 62 connected to the plurality of refrigerant flow paths 52 of the cooler 15 at the center in the insertion direction of the plurality of secondary batteries 11. Is formed.
On each surface of the pair of second wall portions 17c, a guide groove 63 in which a second fixing member 21 described later is mounted and a bolt insertion hole 64 facing the bolt mounting hole 15c of the cooler 15 are formed. Yes.
１対の端子カバー１８の各々の外形は、図１０に示すように、板状に形成されている。端子カバー１８は、樹脂などの非導電性の材料により形成されている。端子カバー１８は、筐体１７の開口部１７ａに装着されて、開口部１７ａを塞ぐとともに、複数の二次電池１１の各々の端子面３５側の部位を固定する。端子カバー１８は、筐体１７の開口部１７ａに装着された状態で複数の二次電池１１の正極端子３２および負極端子３３を外部に露出させる複数の端子孔１８ａを備えている。端子カバー１８は、後述する第１固定部材２０が装着されるガイド溝７１を表面に備えている。 The external shape of each of the pair of terminal covers 18 is formed in a plate shape as shown in FIG. The terminal cover 18 is made of a nonconductive material such as resin. The terminal cover 18 is attached to the opening 17a of the housing 17, closes the opening 17a, and fixes a portion on the terminal surface 35 side of each of the plurality of secondary batteries 11. The terminal cover 18 includes a plurality of terminal holes 18 a that expose the positive terminals 32 and the negative terminals 33 of the plurality of secondary batteries 11 to the outside in a state of being attached to the openings 17 a of the housing 17. The terminal cover 18 includes a guide groove 71 on the surface where a first fixing member 20 described later is mounted.
複数のバスバー１９の各々の外形は、図１に示すように、例えばＵ字型に湾曲する中央部を有する板状に形成されている。各バスバー１９は、アルミニウムなどの金属によって形成されている。各バスバー１９は、例えば、板状の金属の曲げ成形などによって形成され、複数の二次電池１１に対する各種の接続形態に応じた所定形状を有している。例えば図１に示す各バスバー１９は、各端子孔１８ａから露出する正極端子３２および負極端子３３、つまり短手方向で隣り合う二次電池１１の互いの正極端子３２および負極端子３３を接続する概略Ｉ型板状に形成されている。 As shown in FIG. 1, the outer shape of each of the plurality of bus bars 19 is formed in a plate shape having a central portion that is curved, for example, in a U shape. Each bus bar 19 is made of metal such as aluminum. Each bus bar 19 is formed, for example, by bending a plate-like metal or the like, and has a predetermined shape corresponding to various connection forms with respect to the plurality of secondary batteries 11. For example, each bus bar 19 shown in FIG. 1 schematically connects the positive terminal 32 and the negative terminal 33 exposed from each terminal hole 18a, that is, the positive terminal 32 and the negative terminal 33 of the secondary battery 11 adjacent in the short direction. It is formed in an I-shaped plate.
２つの第１固定部材２０の各々の外形は、図１および図１１に示すように、両端部が屈曲した板状に形成されている。第１固定部材２０は、例えば鋼板などの板状の金属によって形成されている。第１固定部材２０は、端子カバー１８のガイド溝７１に装着される本体部２０ａと、筐体１７および端子カバー１８を複数の二次電池１１の積層方向の両側から挟み込むように本体部２０ａから屈曲する２つの屈曲部２０ｂとを備えている。第１固定部材２０は、ボルト挿入孔２０ｃが形成された両端部（つまり、複数の二次電池１１の積層方向における両端部）を備えている。 As shown in FIGS. 1 and 11, the outer shape of each of the two first fixing members 20 is formed in a plate shape in which both ends are bent. The first fixing member 20 is formed of a plate-like metal such as a steel plate, for example. The first fixing member 20 extends from the main body portion 20a so as to sandwich the main body portion 20a mounted in the guide groove 71 of the terminal cover 18 and the casing 17 and the terminal cover 18 from both sides in the stacking direction of the plurality of secondary batteries 11. And two bent portions 20b to be bent. The first fixing member 20 includes both end portions in which bolt insertion holes 20c are formed (that is, both end portions in the stacking direction of the plurality of secondary batteries 11).
２つの第２固定部材２１の各々の外形は、図１および図１２に示すように、両端部が屈曲した板状に形成されている。第２固定部材２１は、例えば鋼板などの板状の金属によって形成されている。第２固定部材２１は、筐体１７のガイド溝６３に装着される本体部２１ａと、第２固定部材２１の両端部（つまり、複数の二次電池１１の挿入方向の両端部）において本体部２１ａから屈曲する２つの屈曲部２１ｂとを備えている。第２固定部材２１は、筐体１７のボルト挿入孔６４に臨むボルト装着孔２１ｃが形成された本体部２１ａを備えている。第２固定部材２１は、第１固定部材２０のボルト挿入孔２０ｃに臨むボルト挿入孔２１ｄが形成された２つの屈曲部２１ｂを備えている。これにより各第２固定部材２１は、２つの屈曲部２１ｂの各々のボルト挿入孔２１ｄと、２つの第１固定部材２０の各々のボルト挿入孔２０ｃとにボルト（図示略）が装着されることによって、２つの第１固定部材２０を連結する。つまり、２つの第１固定部材２０は、１対の端子カバー１８が装着された筐体１７を複数の二次電池１１の挿入方向の両側から挟み込むようにして、２つの第２固定部材２１によって連結される。さらに、各第２固定部材２１は、本体部２１ａのボルト装着孔２１ｃと、筐体１７のボルト挿入孔６４とに装着されるボルト（図示略）によって、２つの第１固定部材２０を筐体１７に固定する。 As shown in FIGS. 1 and 12, the outer shape of each of the two second fixing members 21 is formed in a plate shape in which both ends are bent. The second fixing member 21 is formed of a plate-like metal such as a steel plate, for example. The second fixing member 21 includes a main body portion 21a mounted in the guide groove 63 of the housing 17 and main body portions at both end portions of the second fixing member 21 (that is, both end portions in the insertion direction of the plurality of secondary batteries 11). And two bent portions 21b bent from 21a. The second fixing member 21 includes a main body portion 21 a in which a bolt mounting hole 21 c facing the bolt insertion hole 64 of the housing 17 is formed. The second fixing member 21 includes two bent portions 21b in which bolt insertion holes 21d facing the bolt insertion holes 20c of the first fixing member 20 are formed. As a result, each second fixing member 21 is mounted with a bolt (not shown) in each bolt insertion hole 21d of the two bent portions 21b and each bolt insertion hole 20c of the two first fixing members 20. Thus, the two first fixing members 20 are connected. That is, the two first fixing members 20 are formed by the two second fixing members 21 so as to sandwich the casing 17 on which the pair of terminal covers 18 are mounted from both sides in the insertion direction of the plurality of secondary batteries 11. Connected. Further, each of the second fixing members 21 has two first fixing members 20 mounted on the casing by bolts (not shown) mounted on the bolt mounting holes 21c of the main body 21a and the bolt insertion holes 64 of the casing 17. 17 to fix.
実施形態の組電池モジュール１０において、複数の第１熱伝導プレート１２および第２熱伝導プレート１３の各々は、図１３に示すように、各二次電池１１の外装容器３１の底面３７と１対の長側面３６ａの一部とを覆うとともに冷却器１５に接触している。これにより複数の第１熱伝導プレート１２および第２熱伝導プレート１３の各々は、各二次電池１１の発熱部Ｆを、冷却器１５の各冷媒流路５２を流通する液体冷媒によって冷却する。
複数の第２熱伝導プレート１３の各々は、外装容器３１の高さよりも短い側面部１３ｂを有するので、積層方向で隣り合う二次電池１１の高さ方向における端子面３５側の領域において、長側面３６ａと第１絶縁部材１４との間に第１空隙５１を形成している。これにより複数の第２熱伝導プレート１３の各々は、各二次電池１１の発熱部Ｆを、第１空隙５１を流通する空気などの気体冷媒によって冷却する。
複数の第１熱伝導プレート１２の各々は、外装容器３１の高さよりも短い側面部１２ｂを有するので、第２壁部１７ｃに対向する二次電池１１の高さ方向における端子面３５側の領域において、長側面３６ａと第２壁部１７ｃとの間に第２空隙５３を形成している。これにより複数の第１熱伝導プレート１２の各々は、各二次電池１１の発熱部Ｆを、第２空隙５３を流通する空気などの気体冷媒によって冷却する。
In the assembled battery module 10 of the embodiment, each of the plurality of first heat conduction plates 12 and second heat conduction plates 13 is paired with the bottom surface 37 of the outer container 31 of each secondary battery 11 as shown in FIG. And a part of the long side surface 36a of the same is covered with the cooler 15. Thus, each of the plurality of first heat conduction plates 12 and second heat conduction plates 13 cools the heat generating portion F of each secondary battery 11 with the liquid refrigerant flowing through each refrigerant flow path 52 of the cooler 15.
Since each of the plurality of second heat conductive plates 13 has a side surface portion 13b that is shorter than the height of the outer casing 31, it is long in the region on the terminal surface 35 side in the height direction of the secondary batteries 11 adjacent in the stacking direction. A first gap 51 is formed between the side surface 36 a and the first insulating member 14. Thereby, each of the plurality of second heat conductive plates 13 cools the heat generating portion F of each secondary battery 11 with a gaseous refrigerant such as air flowing through the first gap 51.
Since each of the plurality of first heat conduction plates 12 has the side surface portion 12b shorter than the height of the outer casing 31, the region on the terminal surface 35 side in the height direction of the secondary battery 11 facing the second wall portion 17c. The second gap 53 is formed between the long side surface 36a and the second wall portion 17c. Thus, each of the plurality of first heat conduction plates 12 cools the heat generating portion F of each secondary battery 11 with a gaseous refrigerant such as air flowing through the second gap 53.
実施形態の組電池モジュール１０において、複数の第１熱伝導プレート１２および第２熱伝導プレート１３の各々は、図１４に示すように、各二次電池１１を高さ方向に押圧する第１および第３板ばね部４１，４３を備えている。複数の第１熱伝導プレート１２および第２熱伝導プレート１３の各々は、各二次電池１１を端子面３５側で固定する端子カバー１８および第１固定部材２０に対して、各二次電池１１の底面３７を第１および第３板ばね部４１，４３によって押圧する。各二次電池１１には、高さ方向の両側から、第１および第３板ばね部４１，４３によって底面３７に押圧力Ｐ１が作用し、端子カバー１８および第１固定部材２０によって端子面３５に押圧力Ｐ２が作用する。これにより複数の第１熱伝導プレート１２および第２熱伝導プレート１３の各々は、各二次電池１１の高さ方向において端子カバー１８に対する各端子面３５の相対位置をほぼ同一に揃える。
複数の第１熱伝導プレート１２の各々は、積層方向の両端の各二次電池１１を積層方向における互いの対向方向に押圧する第２板ばね部４２を備えている。積層方向の両端の各二次電池１１には、積層方向の両側から、第２板ばね部４２によって長側面３６ａに押圧力Ｐ３が作用する。これにより複数の第１熱伝導プレート１２の各々は、各二次電池１１の外装容器３１の長側面３６ａと第２熱伝導プレート１３の側面部１３ｂとを密着させる。
In the assembled battery module 10 of the embodiment, as shown in FIG. 14, each of the plurality of first heat conduction plates 12 and second heat conduction plates 13 presses each secondary battery 11 in the height direction. Third plate spring portions 41 and 43 are provided. Each of the plurality of first heat conduction plates 12 and the second heat conduction plates 13 is provided for each secondary battery 11 with respect to the terminal cover 18 and the first fixing member 20 that fix each secondary battery 11 on the terminal surface 35 side. Is pressed by the first and third leaf spring portions 41 and 43. On each secondary battery 11, a pressing force P <b> 1 acts on the bottom surface 37 by the first and third leaf spring portions 41, 43 from both sides in the height direction, and the terminal surface 35 by the terminal cover 18 and the first fixing member 20. The pressing force P2 acts on the. Thereby, each of the plurality of first heat conductive plates 12 and the second heat conductive plates 13 aligns the relative positions of the terminal surfaces 35 with respect to the terminal cover 18 in the height direction of the respective secondary batteries 11 substantially the same.
Each of the plurality of first heat conduction plates 12 includes a second leaf spring portion 42 that presses each secondary battery 11 at both ends in the stacking direction in the opposing direction in the stacking direction. A pressing force P3 is applied to each of the secondary batteries 11 at both ends in the stacking direction by the second leaf spring portion 42 on the long side surface 36a from both sides in the stacking direction. Thereby, each of the plurality of first heat conductive plates 12 brings the long side surface 36 a of the outer casing 31 of each secondary battery 11 into close contact with the side surface portion 13 b of the second heat conductive plate 13.
以上説明した実施形態によれば、複数の二次電池１１の各々における表面の一部を覆うとともに冷却器１５に接触する複数の第１熱伝導プレート１２および第２熱伝導プレート１３を持つことにより、複数の二次電池１１を迅速かつ適正に冷却することができる。さらに、各二次電池１１の外装容器３１の底面３７と各長側面３６ａの一部とを覆う第１および第２熱伝導プレート１２，１３を持つことにより、各二次電池１１の高さ方向の底面３７側の部位を、冷却器１５の液体冷媒によって冷却することができる。さらに、積層方向で隣り合う二次電池１１の高さ方向における端子面３５側の領域に第１空隙５１を形成する第２熱伝導プレート１３を持つことにより、各二次電池１１の高さ方向の端子面３５側の部位を、第１空隙５１の気体冷媒によって冷却することができる。さらに、第２壁部１７ｃに対向する二次電池１１の高さ方向における端子面３５側の領域に第２空隙５３を形成する第１熱伝導プレート１２を持つことにより、各二次電池１１の高さ方向の端子面３５側の部位を、第２空隙５３の気体冷媒によって冷却することができる。つまり、複数の第１および第２熱伝導プレート１２，１３を持つことにより、各二次電池１１を液体冷媒と気体冷媒とによって冷却することができ、各二次電池１１の全体を液体冷媒で冷却する場合に比べて、冷却器１５が大きくなることを防ぐことができる。 According to the embodiment described above, by having a plurality of first heat conduction plates 12 and second heat conduction plates 13 that cover a part of the surface of each of the plurality of secondary batteries 11 and are in contact with the cooler 15. The plurality of secondary batteries 11 can be cooled quickly and appropriately. Furthermore, by having the 1st and 2nd heat conductive plates 12 and 13 which cover the bottom face 37 of the exterior container 31 of each secondary battery 11, and a part of each long side surface 36a, the height direction of each secondary battery 11 is provided. The portion on the bottom surface 37 side can be cooled by the liquid refrigerant of the cooler 15. Furthermore, by having the 2nd heat conductive plate 13 which forms the 1st space | gap 51 in the area | region by the side of the terminal surface 35 in the height direction of the secondary battery 11 adjacent in a lamination direction, the height direction of each secondary battery 11 The portion on the terminal surface 35 side can be cooled by the gas refrigerant in the first gap 51. Furthermore, by having the 1st heat conductive plate 12 which forms the 2nd space | gap 53 in the area | region by the side of the terminal surface 35 in the height direction of the secondary battery 11 facing the 2nd wall part 17c, each secondary battery 11 of FIG. A portion on the terminal surface 35 side in the height direction can be cooled by the gas refrigerant in the second gap 53. That is, by having the plurality of first and second heat conducting plates 12 and 13, each secondary battery 11 can be cooled by the liquid refrigerant and the gas refrigerant, and the whole of each secondary battery 11 is made of the liquid refrigerant. It is possible to prevent the cooler 15 from becoming larger than when cooling.
さらに、積層方向で隣り合う二次電池１１の間に設けられる複数の第１空隙５１に臨む複数の貫通孔６１が設けられた筐体１７を持つことにより、各貫通孔６１を介して各第１空隙５１に気体冷媒を流通させて、各二次電池１１を効率良く冷却することができる。
さらに、厚さ方向の両側に複数の二次電池１１が配置される冷却器１５を持つことにより、冷却器１５によって複数の二次電池１１を効率良く冷却することができる。
さらに、複数の二次電池１１の積層方向で冷却器１５の端部１５ａから中央部１５ｂに向かうことに伴い、流路断面積が増大傾向に変化する複数の冷媒流路５２が設けられた冷却器１５を持つことにより、複数の二次電池１１を適正に冷却することができる。冷却器１５の端部１５ａから中央部１５ｂに向かうことに伴い、各冷媒流路５２の液体冷媒の流量が増大傾向に変化するので、複数の二次電池１１の積層方向において相対的に温度が上昇し易い中央部の二次電池１１に対して冷却能力を増大させることができる。
Furthermore, by having the casing 17 provided with a plurality of through holes 61 facing the plurality of first gaps 51 provided between the secondary batteries 11 adjacent in the stacking direction, each of the first through the through holes 61. Each secondary battery 11 can be efficiently cooled by allowing a gaseous refrigerant to flow through the one gap 51.
Furthermore, by having the cooler 15 in which the plurality of secondary batteries 11 are arranged on both sides in the thickness direction, the plurality of secondary batteries 11 can be efficiently cooled by the cooler 15.
Further, cooling provided with a plurality of refrigerant channels 52 whose channel cross-sectional area changes in an increasing direction as the plurality of secondary batteries 11 are stacked in the stacking direction from the end 15a of the cooler 15 toward the center 15b. By having the container 15, the plurality of secondary batteries 11 can be appropriately cooled. As the flow rate of the liquid refrigerant in each refrigerant flow path 52 changes in an increasing trend as it goes from the end 15a of the cooler 15 to the central portion 15b, the temperature is relatively increased in the stacking direction of the secondary batteries 11. The cooling capacity can be increased with respect to the secondary battery 11 in the central portion that is likely to rise.
さらに、筐体１７の内部において複数の二次電池１１の挿入方向における中央部に固定される冷却器１５を持つことにより、筐体１７の強度を補強することができ、組電池モジュール１０の剛性を向上させることができる。さらに、複数の二次電池１１の積層方向の剛性を向上させることができ、組電池モジュール１０の最低固有振動数を増大させることができ、外部衝撃に対する所望の強度を確保することができる。 Furthermore, by having the cooler 15 fixed in the center part in the insertion direction of the plurality of secondary batteries 11 inside the housing 17, the strength of the housing 17 can be reinforced, and the rigidity of the assembled battery module 10. Can be improved. Furthermore, the rigidity in the stacking direction of the plurality of secondary batteries 11 can be improved, the lowest natural frequency of the assembled battery module 10 can be increased, and a desired strength against external impact can be ensured.
さらに、各二次電池１１を端子面３５側で固定する端子カバー１８および第１固定部材２０と、各二次電池１１の底面３７を押圧する第１および第３板ばね部４１，４３とを持つことにより、各二次電池１１の高さ方向の位置合わせを容易に行なうことができる。第１および第３板ばね部４１，４３は、各二次電池１１の寸法公差を吸収して、端子カバー１８に対する各端子面３５の相対位置をほぼ同一に揃えることができる。これにより、例えば自動的な溶接などによって複数のバスバー１９を複数の二次電池１１の正極端子３２および負極端子３３に接続する際に、必要とされる複数の正極端子３２および負極端子３３の位置合わせを容易に行なうことができる。 Furthermore, the terminal cover 18 and the first fixing member 20 that fix each secondary battery 11 on the terminal surface 35 side, and the first and third leaf spring portions 41 and 43 that press the bottom surface 37 of each secondary battery 11 are provided. By holding, the secondary batteries 11 can be easily aligned in the height direction. The first and third leaf spring portions 41 and 43 can absorb the dimensional tolerance of each secondary battery 11 and can make the relative positions of the terminal surfaces 35 with respect to the terminal cover 18 substantially the same. Thereby, for example, when the plurality of bus bars 19 are connected to the positive terminals 32 and the negative terminals 33 of the plurality of secondary batteries 11 by automatic welding or the like, the positions of the plurality of positive terminals 32 and negative terminals 33 required. Matching can be performed easily.
さらに、積層方向の両端の各二次電池１１を積層方向における互いの対向方向に押圧する複数の第２板ばね部４２を持つことにより、各二次電池１１の外装容器３１の長側面３６ａと第２熱伝導プレート１３の側面部１３ｂとを密着させることができる。複数の第２板ばね部４２は、各二次電池１１と各第２熱伝導プレート１３とを密着させることにより、各二次電池１１の放熱性と、各二次電池１１と各第２熱伝導プレート１３との間の熱伝導性とを向上させることができ、冷却性能を向上させることができる。 Further, by having a plurality of second leaf spring portions 42 that press the respective secondary batteries 11 at both ends in the stacking direction in the opposing direction in the stacking direction, the long side surface 36a of the outer container 31 of each secondary battery 11 and The side surface portion 13b of the second heat conductive plate 13 can be brought into close contact. The plurality of second leaf spring portions 42 bring each secondary battery 11 and each second heat conducting plate 13 into close contact with each other, thereby dissipating heat from each secondary battery 11 and each secondary battery 11 and each second heat. The thermal conductivity between the conductive plate 13 and the conductive plate 13 can be improved, and the cooling performance can be improved.
さらに、第１熱伝導プレート１２および第２熱伝導プレート１３の各一部に設けられる各切り欠き４１ａ，４２ａ，４３ａによって形成される第１〜第３板ばね部４１，４２，４３を持つことにより、簡単な構成によって各二次電池１１を押圧することができる。
さらに、複数の二次電池１１を、筐体１７、冷却器１５、および１対の端子カバー１８によって、挿入方向および積層方向の両側から挟み込むようにして固定する各１対の第１および第２固定部材２０，２１を持つことにより、剛性を向上させることができる。
Furthermore, it has the 1st-3rd leaf | plate spring parts 41, 42, and 43 formed by each notch 41a, 42a, 43a provided in each part of the 1st heat conductive plate 12 and the 2nd heat conductive plate 13. FIG. Thus, each secondary battery 11 can be pressed with a simple configuration.
Further, each of the pair of first and second batteries is fixed by the casing 17, the cooler 15, and the pair of terminal covers 18 so as to be sandwiched from both sides in the insertion direction and the stacking direction. By having the fixing members 20 and 21, the rigidity can be improved.
以下、第１の変形例について説明する。
上述した実施形態において、冷却器１５は、筐体１７および第２固定部材２１にボルトによって固定されるとしたが、これに限定されない。例えば、冷却器１５は、接着剤などによって筐体１７に固定されてもよい。
Hereinafter, a first modification will be described.
In the above-described embodiment, the cooler 15 is fixed to the casing 17 and the second fixing member 21 with bolts, but is not limited thereto. For example, the cooler 15 may be fixed to the housing 17 with an adhesive or the like.
以下、第２の変形例について説明する。
上述した実施形態において、冷却器１５は、積層方向における二次電池１１の積層数と同数の冷媒流路５２を備え、積層方向で冷却器１５の端部１５ａから中央部１５ｂに向かうことに伴い、流路断面積が増大傾向に変化するとしたが、これに限定されない。例えば、冷却器１５は、複数の冷媒流路５２の各々の流路断面積を一定として、積層方向で冷却器１５の端部１５ａから中央部１５ｂに向かうことに伴い、単位領域あたりに含まれる冷媒流路５２の数を増大させてもよい。
Hereinafter, a second modification will be described.
In the above-described embodiment, the cooler 15 includes the same number of refrigerant flow paths 52 as the number of stacked secondary batteries 11 in the stacking direction, and is directed from the end 15a of the cooler 15 toward the central portion 15b in the stacking direction. Although the channel cross-sectional area is changed to increase, the present invention is not limited to this. For example, the cooler 15 is included per unit region as the flow path cross-sectional area of each of the plurality of refrigerant flow paths 52 is constant and the direction from the end 15a to the center 15b of the cooler 15 is increased in the stacking direction. The number of refrigerant flow paths 52 may be increased.
以下、第３の変形例について説明する。
上述した実施形態において、第１熱伝導プレート１２および第２熱伝導プレート１３は、第１〜第３板ばね部４１，４２，４３を備えるとしたが、これに限定されない。例えば、第１熱伝導プレート１２および第２熱伝導プレート１３は、各二次電池１１を押圧する他のばね部材を備えてもよい。
Hereinafter, a third modification will be described.
In the above-described embodiment, the first heat conduction plate 12 and the second heat conduction plate 13 include the first to third leaf spring portions 41, 42, and 43, but are not limited thereto. For example, the first heat conductive plate 12 and the second heat conductive plate 13 may include other spring members that press the secondary batteries 11.
以下、第４の変形例について説明する。
上述した実施形態において、第１熱伝導プレート１２および第２熱伝導プレート１３は、各二次電池１１の外装容器３１の底面３７を覆う底面部１２ａ，１３ａを備えるとしたが、これに限定されない。例えば、底面部１２ａ，１３ａは省略されてもよく、側面部１２ｂ，１３ｂが冷却器１５に接触していればよい。
Hereinafter, a fourth modification will be described.
In the above-described embodiment, the first heat conductive plate 12 and the second heat conductive plate 13 include the bottom surface portions 12a and 13a that cover the bottom surface 37 of the exterior container 31 of each secondary battery 11. However, the present invention is not limited thereto. . For example, the bottom surface portions 12a and 13a may be omitted as long as the side surface portions 12b and 13b are in contact with the cooler 15.
以上説明した少なくともひとつの実施形態によれば、冷却器１５に接触して各二次電池１１の表面の一部を覆い、第１および第２空隙５１，５３を形成する複数の第１および第２熱伝導プレート１２，１３を持つことにより、複数の二次電池１１を迅速かつ適正に冷却することができる。複数の第１および第２熱伝導プレート１２，１３を持つことにより、各二次電池１１を液体冷媒と気体冷媒とによって冷却することができ、各二次電池１１の全体を液体冷媒で冷却する場合に比べて、冷却器１５が大きくなることを防ぐことができる。 According to at least one embodiment described above, the first and second plurality of first and second gaps that contact the cooler 15 and cover a part of the surface of each secondary battery 11 to form the first and second gaps 51 and 53 are formed. By having the two heat conductive plates 12 and 13, the plurality of secondary batteries 11 can be quickly and appropriately cooled. By having the plurality of first and second heat conducting plates 12 and 13, each secondary battery 11 can be cooled by liquid refrigerant and gas refrigerant, and the whole of each secondary battery 11 is cooled by liquid refrigerant. Compared to the case, it is possible to prevent the cooler 15 from becoming large.
さらに、積層方向で隣り合う二次電池１１の間に設けられる複数の第１空隙５１に臨む複数の貫通孔６１が設けられた筐体１７を持つことにより、各貫通孔６１を介して各第１空隙５１に気体冷媒を流通させて、各二次電池１１を効率良く冷却することができる。
さらに、厚さ方向の両側に複数の二次電池１１が配置される冷却器１５を持つことにより、冷却器１５によって複数の二次電池１１を効率良く冷却することができる。
さらに、冷却器１５の端部１５ａから中央部１５ｂに向かうことに伴い、積層方向の単位領域あたりの流路断面積が増大傾向に変化する複数の冷媒流路５２が設けられた冷却器１５を持つことにより、複数の二次電池１１を適正に冷却することができる。
Furthermore, by having the casing 17 provided with a plurality of through holes 61 facing the plurality of first gaps 51 provided between the secondary batteries 11 adjacent in the stacking direction, each of the first through the through holes 61. Each secondary battery 11 can be efficiently cooled by allowing a gaseous refrigerant to flow through the one gap 51.
Furthermore, by having the cooler 15 in which the plurality of secondary batteries 11 are arranged on both sides in the thickness direction, the plurality of secondary batteries 11 can be efficiently cooled by the cooler 15.
Furthermore, the cooler 15 provided with a plurality of refrigerant flow paths 52 in which the flow path cross-sectional area per unit region in the stacking direction changes in an increasing trend as it goes from the end 15a of the cooler 15 to the central portion 15b. By having it, the plurality of secondary batteries 11 can be appropriately cooled.
さらに、筐体１７の内部において複数の二次電池１１の挿入方向における中央部に固定される冷却器１５を持つことにより、筐体１７の強度を補強することができ、組電池モジュール１０の剛性を向上させることができる。さらに、複数の二次電池１１の積層方向の剛性を向上させることができ、組電池モジュール１０の最低固有振動数を増大させることができ、外部衝撃に対する所望の強度を確保することができる。 Furthermore, by having the cooler 15 fixed in the center part in the insertion direction of the plurality of secondary batteries 11 inside the housing 17, the strength of the housing 17 can be reinforced, and the rigidity of the assembled battery module 10. Can be improved. Furthermore, the rigidity in the stacking direction of the plurality of secondary batteries 11 can be improved, the lowest natural frequency of the assembled battery module 10 can be increased, and a desired strength against external impact can be ensured.
さらに、積層方向の両端の各二次電池１１を積層方向における互いの対向方向に押圧する１対の第１熱伝導プレート１２を持つことにより、各二次電池１１の外装容器３１の長側面３６ａと第２熱伝導プレート１３の側面部１３ｂとを密着させることができる。１対の第１熱伝導プレート１２は、各二次電池１１と各第２熱伝導プレート１３とを密着させることにより、各二次電池１１の放熱性と、各二次電池１１と各第２熱伝導プレート１３との間の熱伝導性とを向上させることができ、冷却性能を向上させることができる。 Furthermore, by having the pair of first heat conduction plates 12 that press the respective secondary batteries 11 at both ends in the stacking direction in the opposing direction in the stacking direction, the long side surface 36a of the outer container 31 of each secondary battery 11 is provided. And the side surface portion 13b of the second heat conductive plate 13 can be brought into close contact with each other. The pair of first heat conduction plates 12 bring the secondary batteries 11 and the second heat conduction plates 13 into close contact with each other, thereby dissipating heat from each secondary battery 11 and each secondary battery 11 and each second heat conduction plate 13. The heat conductivity between the heat conducting plate 13 and the heat conducting plate 13 can be improved, and the cooling performance can be improved.
本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。 Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.
１０…組電池モジュール、１２…第１熱伝導プレート、１３…第２熱伝導プレート、１４…第１絶縁部材、１５…冷却器、１６…第２絶縁部材、１７…筐体、１８…端子カバー、１９…バスバー、２０…第１固定部材、２１…第２固定部材、３１…外装容器、３２…正極端子、３３…負極端子、３５…端子面、３６ａ…長側面、３６ｂ…短側面、３７…底面、４１…第１板ばね部、４２…第２板ばね部、４３…第３板ばね部、４１ａ，４２ａ，４３ａ…切り欠き、５１…第１空隙、５２…冷媒流路、５３…第２空隙 DESCRIPTION OF SYMBOLS 10 ... Assembly battery module, 12 ... 1st heat conductive plate, 13 ... 2nd heat conductive plate, 14 ... 1st insulating member, 15 ... Cooler, 16 ... 2nd insulating member, 17 ... Housing | casing, 18 ... Terminal cover , 19 ... bus bar, 20 ... first fixing member, 21 ... second fixing member, 31 ... exterior container, 32 ... positive electrode terminal, 33 ... negative electrode terminal, 35 ... terminal surface, 36a ... long side surface, 36b ... short side surface, 37 ... bottom surface, 41 ... first plate spring part, 42 ... second plate spring part, 43 ... third plate spring part, 41a, 42a, 43a ... notch, 51 ... first gap, 52 ... refrigerant flow path, 53 ... Second gap
Claims (8)
前記冷却器の厚さ方向の両側において前記厚さ方向に直交する方向に積層され、底面を前記冷却器に対向させるように配置される複数の二次電池と、
前記複数の二次電池および前記冷却器を収容する非導電性の筐体と、
前記複数の二次電池の各々における表面の少なくとも一部を覆うとともに前記冷却器に接触する金属から成る複数の熱伝導プレートと、
前記複数の二次電池の隣り合う二次電池の間を電気的に絶縁する第１絶縁部材と、
前記複数の二次電池の各々と前記冷却器との間を電気的に絶縁する第２絶縁部材と、
を備え、
前記複数の二次電池の隣り合う二次電池は、第１空隙を形成するように前記熱伝導プレートを介在させて離間して配置され、
前記複数の二次電池の各々と前記筐体とは、第２空隙を形成するように前記熱伝導プレートを介在させて離間して配置される、
組電池モジュール。 A cooler made of metal provided with a flow path for liquid refrigerant;
A plurality of secondary batteries stacked in a direction perpendicular to the thickness direction on both sides of the thickness direction of the cooler, and disposed so that a bottom surface faces the cooler;
A non-conductive housing that houses the plurality of secondary batteries and the cooler;
A plurality of heat conducting plates made of metal covering at least part of the surface of each of the plurality of secondary batteries and contacting the cooler;
A first insulating member that electrically insulates between adjacent secondary batteries of the plurality of secondary batteries;
A second insulating member for electrically insulating between each of the plurality of secondary batteries and the cooler;
With
Adjacent secondary batteries of the plurality of secondary batteries are spaced apart by interposing the heat conduction plate so as to form a first gap,
Each of the plurality of secondary batteries and the housing are spaced apart with the heat conducting plate interposed so as to form a second gap.
Battery module.
前記複数の二次電池の各々は、前記第１空隙および前記第２空隙を前記高さ方向における前記電極端子面側に形成する、
請求項１に記載の組電池モジュール。 Each of the plurality of heat conduction plates is provided on the bottom surface side of the side surface in the height direction from the bottom surface of each of the plurality of secondary batteries toward the electrode terminal surface,
Each of the plurality of secondary batteries forms the first gap and the second gap on the electrode terminal surface side in the height direction.
The assembled battery module according to claim 1.
請求項２に記載の組電池モジュール。 Each of the plurality of heat conduction plates covers a part of the long side surface and the bottom surface among the wide long side surface and the short short side surface forming the side surface of each of the plurality of secondary batteries.
The assembled battery module according to claim 2.
前記複数の前記流路による前記積層方向の単位領域あたりの流路断面積は、前記積層方向における前記単位領域の位置が前記冷却器の端部から中央部に向かい変化することに伴って、増大傾向に変化する、
請求項１から請求項３の何れか１つに記載の組電池モジュール。 The cooler includes a plurality of the flow paths extending in a direction orthogonal to the thickness direction and the stacking direction at a plurality of different positions in the stacking direction of the plurality of secondary batteries,
The flow path cross-sectional area per unit region in the stacking direction due to the plurality of flow channels increases as the position of the unit region in the stacking direction changes from the end of the cooler toward the center. Change to a trend,
The assembled battery module according to any one of claims 1 to 3.
請求項１から請求項４の何れか１つに記載の組電池モジュール。 The cooler is fixed to the housing;
The assembled battery module according to any one of claims 1 to 4.
請求項１から請求項５の何れか１つに記載の組電池モジュール。 Of each of the plurality of heat conduction plates, at least each of the heat conduction plates at both ends in the stacking direction of the plurality of secondary batteries includes a pressing portion that applies a pressing force in the stacking direction to the surface of the secondary battery.
The assembled battery module according to any one of claims 1 to 5.
前記複数の熱伝導プレートにおいて、少なくとも前記複数の二次電池の各々の底面を覆う部位は、前記底面に押圧力を作用させる押圧部を備える、
請求項１から請求項６の何れか１つに記載の組電池モジュール。 A terminal cover for fixing terminal portions of the plurality of secondary batteries,
In the plurality of heat conductive plates, at least a portion covering the bottom surface of each of the plurality of secondary batteries includes a pressing portion that applies a pressing force to the bottom surface.
The assembled battery module according to any one of claims 1 to 6.
請求項６または請求項７に記載の組電池モジュール。 The pressing portion is a leaf spring formed by a notch provided in a part of the heat conducting plate.
The assembled battery module according to claim 6 or 7.
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