JP2014203753A

JP2014203753A - Power storage module

Info

Publication number: JP2014203753A
Application number: JP2013080682A
Authority: JP
Inventors: 康貴宮脇; Yasutaka Miyawaki; 芳浩土手; Yoshihiro Tsuchide; 裕史山城; Hiroshi Yamashiro
Original assignee: GS Yuasa Corp
Current assignee: GS Yuasa Corp
Priority date: 2013-04-08
Filing date: 2013-04-08
Publication date: 2014-10-27
Anticipated expiration: 2033-04-08
Also published as: JP6164519B2

Abstract

PROBLEM TO BE SOLVED: To provide a power storage module capable of being built without changing a frame even when voltage or capacitance of a power storage module is different.SOLUTION: A power storage module includes: a frame capable of confining a power storage element; and a supplementary member that is disposed where the power storage element is to be disposed.

Description

本発明は、電池セル（単電池）やキャパシタなどの蓄電素子を備える蓄電モジュールに関する。 The present invention relates to a power storage module including a power storage element such as a battery cell (unit cell) or a capacitor.

蓄電モジュールは、複数の蓄電素子と、これらの蓄電素子を一体的に保持するフレームとを備えている（特許文献１参照）。フレームは、整列した蓄電素子を挟み込む一対の終端部材と、該一対の終端部材を連結する連結部材とを備える。 The power storage module includes a plurality of power storage elements and a frame that integrally holds the power storage elements (see Patent Document 1). The frame includes a pair of terminal members that sandwich the aligned power storage elements, and a connecting member that connects the pair of terminal members.

一般的に、蓄電モジュールの電圧は、複数の蓄電素子を電気的に直列接続することにより、所望の値に設定されている。また、蓄電モジュールの電気容量（電池セルの場合は、電池容量に相当し、キャパシタの場合は、静電容量に相当する）は、複数の蓄電素子を電気的に並列接続することにより、所望の値に設定されている。 In general, the voltage of the power storage module is set to a desired value by electrically connecting a plurality of power storage elements in series. In addition, the electric capacity of the power storage module (corresponding to the battery capacity in the case of a battery cell and equivalent to the electrostatic capacity in the case of a capacitor) is obtained by electrically connecting a plurality of power storage elements in parallel. Is set to a value.

そのため、電圧や電気容量が異なる蓄電モジュールは、蓄電素子の数が異なる。これに伴い、電圧や電気容量が異なる蓄電モジュールのフレームは、蓄電素子を拘束する方向の長さが異なる。すなわち、電圧又は電気容量ごとに異なるフレームが用いられる。しかしながら、このように異なるフレームを用いると、製造上の管理が煩雑となり、また、製造コストも高騰してしまう。 Therefore, power storage modules having different voltages and electric capacities have different numbers of power storage elements. Accordingly, the frames of the power storage modules having different voltages and electric capacities have different lengths in the direction of restraining the power storage elements. That is, a different frame is used for each voltage or electric capacity. However, when such different frames are used, management in manufacturing becomes complicated, and the manufacturing cost increases.

特開２０１２−１４４３６０号公報JP 2012-144360 A

そこで、本発明は、蓄電モジュールの電圧又は電気容量を異にしても、フレームを変更することなく構築することができる蓄電モジュールを提供することを課題とする。 Therefore, an object of the present invention is to provide a power storage module that can be constructed without changing the frame even if the voltage or the electric capacity of the power storage module is different.

本発明に係る蓄電モジュールは、
蓄電素子を拘束可能なフレームと、
前記蓄電素子が配置されるべき位置に配置された補充部材と、
を備える。 The power storage module according to the present invention includes:
A frame capable of restraining the storage element;
A replenishment member disposed at a position where the power storage element is to be disposed;
Is provided.

かかる構成によれば、蓄電モジュールの電圧又は電気容量に合わせて、蓄電素子が配置されるべき位置に補充部材が配置され、フレームが蓄電素子を拘束する方向におけるフレームの長さが変わらない。よって、蓄電モジュールの電圧又は電気容量を異にしても、フレームを変更することなく構築することができる。 According to such a configuration, the supplementary member is disposed at a position where the power storage element is to be disposed in accordance with the voltage or electric capacity of the power storage module, and the length of the frame in the direction in which the frame restrains the power storage element does not change. Therefore, even if the voltage or electric capacity of the power storage module is different, it can be constructed without changing the frame.

ここで、本発明に係る蓄電モジュールの一態様として、
補充部材は、電極体が収容されるケースを有する蓄電素子のケースに模して形成された本体を備える
ようにすることができる。 Here, as one aspect of the power storage module according to the present invention,
The replenishing member may be provided with a main body that is formed by imitating a case of a power storage element having a case in which an electrode body is accommodated.

かかる構成によれば、蓄電モジュールの電圧又は電気容量に合わせて、蓄電素子が配置されるべき位置に補充部材が配置されることにより、その位置を補充部材で塞ぐことができ、フレームが蓄電素子を拘束する方向における蓄電モジュールの長さが変わらない。 According to such a configuration, the replenishment member is disposed at a position where the power storage element is to be disposed in accordance with the voltage or electric capacity of the power storage module, so that the position can be closed with the replenishment member, and the frame is stored in the power storage element. The length of the power storage module in the direction of restraining is not changed.

また、本発明に係る蓄電モジュールの他態様として、
蓄電素子と該蓄電素子と並ぶスペーサとが配置されるべき領域を有し、
補充部材において、フレームによる蓄電素子の拘束方向における本体の長さＬは、
同方向におけるケースの長さをＬ１とし、
蓄電素子及びスペーサが配置されるべき位置に配置される該蓄電素子の数量をｎとし、
同方向においてスペーサがケースを離間する長さをＬ２としたときに、以下の式（１）乃至式（３）のいずれか１つから得られる値である
Ｌ＝Ｌ１×ｎ＋Ｌ２×（ｎ＋１）・・・式（１）
Ｌ＝Ｌ１×ｎ＋Ｌ２×（ｎ−１）・・・式（２）
Ｌ＝Ｌ１×ｎ＋Ｌ２×ｎ・・・式（３）
ようにすることができる。 Further, as another aspect of the power storage module according to the present invention,
A region where the storage element and a spacer aligned with the storage element are to be disposed;
In the replenishing member, the length L of the main body in the restraining direction of the power storage element by the frame is:
The length of the case in the same direction is L1,
The number of the electricity storage elements arranged at the positions where the electricity storage elements and the spacers should be arranged is n,
When the length in which the spacer separates the case in the same direction is L2, it is a value obtained from any one of the following formulas (1) to (3): L = L1 × n + L2 × (n + 1) · ..Formula (1)
L = L1 × n + L2 × (n−1) (2)
L = L1 × n + L2 × n (3)
Can be.

かかる構成によれば、一つの補充部材で一つ以上の蓄電素子が配置されるべき位置に配置し、その位置を補充部材で塞ぐことができ、フレームが蓄電素子を拘束する方向における蓄電モジュールの長さが変わらない。 According to such a configuration, one replenishment member can be disposed at a position where one or more power storage elements are to be disposed, and the position can be closed by the replenishment member. The length does not change.

また、本発明に係る蓄電モジュールの別の態様として、
本体の剛性は、ケースの剛性と同じ又は略同じ
ようにすることができる。 Further, as another aspect of the power storage module according to the present invention,
The stiffness of the body can be the same or substantially the same as the stiffness of the case.

かかる構成によれば、蓄電素子に加えていた外力と同じ条件のまま、蓄電素子が配置されるべき位置に補充部材が配置され、該補充部材に外力を加えることができる。 According to such a configuration, the replenishment member is disposed at the position where the power storage element is to be disposed under the same conditions as the external force applied to the power storage element, and the external force can be applied to the replenishment member.

また、本発明に係る蓄電モジュールの更に別の態様として、
蓄電素子を備え、
本体は、蓄電素子に面対向する対向面を有し、
該対向面は、面対向する蓄電素子の面以上の広さを有する
ようにすることができる。 Further, as yet another aspect of the power storage module according to the present invention,
With a storage element,
The main body has a facing surface facing the power storage element,
The facing surface can be wider than the surface of the power storage element facing the surface.

かかる構成によれば、補充部材が蓄電素子に面接触することによって、補充部材から蓄電素子に加わる外力は、蓄電素子の面に均等に加わるようになる。 According to this configuration, when the replenishing member comes into surface contact with the power storage element, the external force applied from the replenishing member to the power storage element is equally applied to the surface of the power storage element.

また、本発明に係る蓄電モジュールの更に別の態様として、
本体は、
ケースの外形に即して形成された枠と、
該枠内に配置された梁部と
を備える
ようにすることができる。 Further, as yet another aspect of the power storage module according to the present invention,
The body is
A frame formed according to the outer shape of the case,
And a beam portion arranged in the frame.

かかる構成によれば、蓄電素子のケースの外形を模しつつ、本体の強度を保つことができる。更に、本体の重量が軽量化される。 According to such a configuration, the strength of the main body can be maintained while imitating the outer shape of the case of the electricity storage element. Furthermore, the weight of the main body is reduced.

また、本発明に係る蓄電モジュールの更に別の態様として、
蓄電素子を備え、
補充部材は、蓄電素子と列をなし、該列の中央寄りに配置される
ようにすることができる。 Further, as yet another aspect of the power storage module according to the present invention,
With a storage element,
The supplementary member may be arranged in a row with the power storage elements and arranged near the center of the row.

かかる構成によれば、隣り合う蓄電素子間で互いに熱を高め合って、複数の蓄電素子がなす列の中で最も熱を蓄えやすいが、そのような蓄電モジュール内であっても、列の中央寄りの位置に補充部材が配置されることで、蓄電モジュール全体の温度上昇が抑えられる。 According to such a configuration, heat is easily increased between adjacent power storage elements, and heat can be stored most easily in a row formed by a plurality of power storage devices. By arranging the replenishing member at a position closer to the position, the temperature increase of the entire power storage module can be suppressed.

また、本発明に係る蓄電モジュールの更に別の態様として、
蓄電素子を備え、
補充部材は、蓄電素子間に配置される
ようにすることができる。 Further, as yet another aspect of the power storage module according to the present invention,
With a storage element,
The supplementary member can be arranged between the power storage elements.

かかる構成によれば、蓄電モジュール内に蓄電素子と補充部材とを並べて配置することにより、隣り合う蓄電素子間で互いに熱を高め合って熱を蓄えやすい位置に補充部材が配置されることで、蓄電モジュール全体の温度上昇が抑えられる。 According to such a configuration, by arranging the power storage element and the supplementary member side by side in the power storage module, the supplementary member is disposed at a position where heat is increased between adjacent power storage elements and heat is easily stored. The temperature rise of the entire power storage module can be suppressed.

また、本発明に係る蓄電モジュールの更に別の態様として、
電極体に接続されている電極端子を有する蓄電素子を備え、
補充部材は、ケースから突出した電極端子が電気的に接続される導電部を有する
ようにすることができる。 Further, as yet another aspect of the power storage module according to the present invention,
An electrical storage element having an electrode terminal connected to the electrode body,
The supplementary member may have a conductive portion to which the electrode terminal protruding from the case is electrically connected.

かかる構成によれば、各蓄電素子は、電極端子との電気的な接続を補充部材の導電部に対して行うことができる。蓄電素子同士の位置関係に制限されることなく蓄電素子間の電気的な接続を行うことができるようになる。 According to such a configuration, each power storage element can make an electrical connection with the electrode terminal to the conductive portion of the supplementary member. Electrical connection between the storage elements can be performed without being limited by the positional relationship between the storage elements.

また、本発明に係る蓄電モジュールの更に別の態様として、
蓄電素子との間に冷却媒体を通す流路を形成する隣接部材と、
流路を流れる冷却媒体の流れを妨げる規制部材と
を備え、
規制部材は、補充部材に隣接する隣接部材が形成する流路に設けられる
ようにすることができる。 Further, as yet another aspect of the power storage module according to the present invention,
An adjacent member that forms a flow path for passing a cooling medium between the storage element and the storage element;
A regulating member that prevents the flow of the cooling medium flowing through the flow path,
The regulating member can be provided in a flow path formed by an adjacent member adjacent to the replenishing member.

かかる構成によれば、発熱体を収容していない補充部材は冷却する必要がないため、規制部材が補充部材に隣接する流路に流れる冷却媒体の流れを妨げて、他の流路に冷却媒体が集中して流れるようにすることができる。そのため、蓄電モジュール全体の冷却性能を上げることができる。 According to such a configuration, the replenishment member that does not contain the heating element does not need to be cooled, so that the restriction member prevents the flow of the cooling medium flowing in the flow path adjacent to the replenishment member, and the cooling medium is transferred to the other flow path. Can be concentrated and flow. Therefore, the cooling performance of the entire power storage module can be improved.

以上のように、本発明によれば、蓄電モジュールの電圧又は電気容量を異にしても、フレームを変更することなく構築することができるという優れた効果を奏し得る。 As described above, according to the present invention, even if the voltage or electric capacity of the power storage module is different, it is possible to achieve an excellent effect that it can be constructed without changing the frame.

図１は、本発明に係る蓄電モジュールの一実施形態である電池モジュールの斜視図を示す。FIG. 1 is a perspective view of a battery module which is an embodiment of a power storage module according to the present invention. 図２は、同電池モジュールの分解斜視図を示す。FIG. 2 shows an exploded perspective view of the battery module. 図３は、同電池モジュールの平面図であって、セル監視回路モジュールが取り外された状態にある電池モジュールの平面図を示す。FIG. 3 is a plan view of the battery module, and shows a plan view of the battery module with the cell monitoring circuit module removed. 図４は、電池セルとスペーサとが複数整列された状態の断面図であって、Ｙ方向の中央をＸ方向に切断した縦断面図を示す。FIG. 4 is a cross-sectional view showing a state in which a plurality of battery cells and spacers are aligned, and shows a vertical cross-sectional view in which the center in the Y direction is cut in the X direction. 図５は、補充部材の斜視図を示す。FIG. 5 shows a perspective view of the replenishing member. 図６は、スペーサをスペーサ本体の一方の面側から見た斜視図を示す。FIG. 6 shows a perspective view of the spacer as viewed from one side of the spacer body. 図７は、スペーサをスペーサ本体の他方の面側から見た斜視図を示す。FIG. 7 is a perspective view of the spacer as viewed from the other surface side of the spacer body.

以下、本発明に係る蓄電モジュールの一実施形態である電池モジュールについて、図面を参酌しつつ説明する。 Hereinafter, a battery module which is an embodiment of a power storage module according to the present invention will be described with reference to the drawings.

図１及び図２に示すように、電池モジュール１は、一列に整列される複数の電池セル３と、電池セル３が配置されるべき位置に配置される補充部材４と、隣り合う電池セル３及び補充部材４間及び整列方向における複数の電池セル３の両側にそれぞれ並んで配置される複数のスペーサ５と、複数の電池セル３，補充部材４及び複数のスペーサ５を拘束可能なフレーム７と、複数の電池セル３の電圧、電流又は温度の少なくとも一つを電池セル３毎に監視するセル監視回路（ＣＭＵ：Cell Monitor Unit）モジュール９とを備えている。本発明の「蓄電素子」は、本実施形態における電池セル３である。本発明の「隣接部材」は、本実施形態におけるスペーサ５である。 As shown in FIGS. 1 and 2, the battery module 1 includes a plurality of battery cells 3 arranged in a row, a replenishment member 4 arranged at a position where the battery cells 3 should be arranged, and adjacent battery cells 3. And a plurality of spacers 5 arranged side by side between the replenishing members 4 and on both sides of the plurality of battery cells 3 in the alignment direction, and a plurality of battery cells 3, a frame 7 capable of restraining the replenishing members 4 and the plurality of spacers 5. A cell monitoring circuit (CMU: Cell Monitor Unit) module 9 that monitors at least one of the voltage, current, or temperature of the plurality of battery cells 3 for each battery cell 3 is provided. The “storage element” of the present invention is the battery cell 3 in the present embodiment. The “adjacent member” of the present invention is the spacer 5 in the present embodiment.

なお、以下においては、便宜上、第一方向をＺ方向（各図に示された直交軸のうちのＺ軸方向）といい、第一方向と直交する第二方向をＹ方向（各図に示された直交軸のうちのＹ軸方向）といい、第一方向及び第二方向と直交する第三方向をＸ方向（各図に示された直交軸のうちのＸ軸方向）という。各図においては、Ｘ方向、Ｙ方向、Ｚ方向のそれぞれ一方側に対し、Ｘ、Ｙ、Ｚの記号を付している。なお、Ｚ方向が鉛直方向に置かれた場合、Ｚ方向は上下方向となり、Ｙ方向は左右方向、Ｘ方向は前後方向となる。 In the following, for the sake of convenience, the first direction is referred to as the Z direction (the Z-axis direction of the orthogonal axes shown in each figure), and the second direction orthogonal to the first direction is referred to as the Y direction (shown in each figure). The third direction perpendicular to the first direction and the second direction is referred to as the X direction (the X axis direction of the orthogonal axes shown in each drawing). In each figure, the X, Y, and Z symbols are attached to one side in each of the X, Y, and Z directions. When the Z direction is placed in the vertical direction, the Z direction is the up / down direction, the Y direction is the left / right direction, and the X direction is the front / rear direction.

電池セル３は、図２に示すように、電極体と、該電極体を収容するケース３０を備えている。ケース３０は、開口部を有するケース本体３１と、該ケース本体３１の開口部を塞いで密閉する蓋体３２とを備える。ケース３０内には、互いに絶縁された正極板と負極板とを含む電極体（図示せず）が収容されている。電池セル３は、Ｘ方向に扁平な角形電池である。 As shown in FIG. 2, the battery cell 3 includes an electrode body and a case 30 that houses the electrode body. The case 30 includes a case main body 31 having an opening and a lid 32 that closes and seals the opening of the case main body 31. In case 30, an electrode body (not shown) including a positive electrode plate and a negative electrode plate which are insulated from each other is accommodated. The battery cell 3 is a rectangular battery flat in the X direction.

電池セル３は、正負極一対の電極端子３３を備えている。隣り合う電池セル３は、極性が反対となるように配置されている。隣り合う電池セル３の電極端子３３には、バスバー３４が取り付けられる。その上で、電極端子３３には、ナットが螺合される。これにより、複数の電池セル３は、電気的に接続され、一つの電池を構成する。 The battery cell 3 includes a pair of positive and negative electrode terminals 33. The adjacent battery cells 3 are arranged so that the polarities are opposite. A bus bar 34 is attached to the electrode terminal 33 of the adjacent battery cell 3. In addition, a nut is screwed onto the electrode terminal 33. Thereby, the some battery cell 3 is electrically connected and comprises one battery.

補充部材４は、図５に示すように、電池セル３のケース３０に模して形成された補充部材本体４１を備える。補充部材本体４１は、少なくともケース３０における電池セル３が整列する方向の長さに対応する厚さを有する。Ｘ方向（フレーム７が電池セル３を拘束する方向）における補充部材本体４１の長さ（厚さ）は、少なくとも同方向における電池セル３の長さ（厚さ）と略同じである。補充部材本体４１の剛性は、ケース３０の剛性と同じ又は略同じである。補充部材本体４１は、電池セル３に面対向する対向面４２を有する。該対向面４２は、面対向する電池セル３の面以上の広さを有する。補充部材本体４１は、ケース３０の外形に即して形成された枠４３と、該枠４３内に配置された梁部４４とを備える。よって、補充部材本体４１は、格子状に形成されている。 As shown in FIG. 5, the replenishing member 4 includes a replenishing member main body 41 that is formed by imitating the case 30 of the battery cell 3. The replenishing member main body 41 has a thickness corresponding to at least the length of the case 30 in the direction in which the battery cells 3 are aligned. The length (thickness) of the replenishing member main body 41 in the X direction (direction in which the frame 7 restrains the battery cell 3) is substantially the same as at least the length (thickness) of the battery cell 3 in the same direction. The rigidity of the replenishing member main body 41 is the same as or substantially the same as the rigidity of the case 30. The replenishing member main body 41 has a facing surface 42 that faces the battery cell 3. The facing surface 42 is larger than the surface of the battery cell 3 facing the surface. The replenishing member main body 41 includes a frame 43 formed in accordance with the outer shape of the case 30 and a beam portion 44 disposed in the frame 43. Therefore, the replenishment member main body 41 is formed in a lattice shape.

補充部材４は、図２に示すように、電池セル３と列をなし、該列の中央寄りに配置される。本実施形態に係る補充部材４は、１つであり、補充部材４は、電池セル３間に配置される。補充部材４の両側の電池セル３同士を電気的に接続するバスバーは、他の電池セル３同士を接続するバスバー３４と異なり、Ｚ形状のバスバー３６である。 As shown in FIG. 2, the replenishment member 4 forms a row with the battery cells 3 and is disposed near the center of the row. There is one replenishment member 4 according to the present embodiment, and the replenishment member 4 is disposed between the battery cells 3. Unlike the bus bar 34 that connects the other battery cells 3, the bus bar that electrically connects the battery cells 3 on both sides of the replenishment member 4 is a Z-shaped bus bar 36.

スペーサ５は、合成樹脂製であり、絶縁性を有している。スペーサ５は、電池セル３と面対向する（本発明の本体としての）スペーサ本体５０と、該スペーサ本体５０からＸ方向に延出し、Ｘ方向において該スペーサ本体５０と対向する電池セル３の外周端部を保持する保持部５１とを備えている。電池セル３のケース３０がＸ方向から見ると矩形状であるのに対応して、スペーサ本体５０は、矩形状に形成されている。保持部５１は、スペーサ本体５０の四つの角部に対向して形成された角部保持部５２と、スペーサ本体５０の三辺のそれぞれ中央部に形成された角部間保持部５３とを備えている。 The spacer 5 is made of synthetic resin and has an insulating property. The spacer 5 has a spacer main body 50 (as a main body of the present invention) facing the battery cell 3, and an outer periphery of the battery cell 3 extending from the spacer main body 50 in the X direction and facing the spacer main body 50 in the X direction. And a holding portion 51 that holds the end portion. Corresponding to the case 30 of the battery cell 3 having a rectangular shape when viewed from the X direction, the spacer body 50 is formed in a rectangular shape. The holding part 51 includes a corner holding part 52 formed to face the four corners of the spacer body 50 and an inter-corner holding part 53 formed at the center of each of the three sides of the spacer body 50. ing.

なお、本実施形態に係る電池モジュール１では、電池セル３間に隙間が形成されている。この隙間に空気が流通することで、電池セル３が冷却される。つまり、電池モジュール１の冷却方式は、空冷式である。空冷式の電池モジュール１のスペーサ５は、空気の流路を確保するために設けられている。このスペーサ５のスペーサ本体５０は、矩形波形状の断面形状を有する。 In the battery module 1 according to this embodiment, a gap is formed between the battery cells 3. The battery cell 3 is cooled by air flowing through the gap. That is, the cooling method of the battery module 1 is an air cooling type. The spacer 5 of the air-cooled battery module 1 is provided to ensure an air flow path. The spacer body 50 of the spacer 5 has a rectangular wave cross-sectional shape.

スペーサ本体５０は、図６及び図７に示すように、Ｙ方向に延びる溝状の流路を形成する流路形成部５４を有する。流路形成部５４は、スペーサ本体５０の両面においてＺ方向にそれぞれの位置を互いにずらして配置される。流路形成部５４は、Ｙ方向における一端から該一端と反対側の他端まで連続して該Ｙ方向に延びる。流路形成部５４は、Ｚ方向に二つ以上配置されている。具体的には、流路形成部５４は、スペーサ本体５０の一方の面（図６側）に４本設けられており、他方の面（図７側）に３本設けられている。 As shown in FIGS. 6 and 7, the spacer main body 50 includes a flow path forming portion 54 that forms a groove-shaped flow path extending in the Y direction. The flow path forming portions 54 are arranged on the both surfaces of the spacer body 50 so that their positions are shifted from each other in the Z direction. The flow path forming portion 54 continuously extends in the Y direction from one end in the Y direction to the other end opposite to the one end. Two or more flow path forming portions 54 are arranged in the Z direction. Specifically, four flow path forming portions 54 are provided on one surface (FIG. 6 side) of the spacer body 50 and three are provided on the other surface (FIG. 7 side).

角部保持部５２は、電池セル３又は補充部材４を安定して拘束すべく、電池セル３のケース３０又は補充部材４の補充部材本体４１の中央を中心とした二つの対角位置（四隅）に配置され、電池セル３のケース３０又は補充部材４の補充部材本体４１の四隅を保持する。角部保持部５２は、スペーサ本体５０の角部におけるＹ方向及びＺ方向の直交端縁からＸ方向の一方側及び他方側の両側に延出する。角部保持部５２の内面は、電池セル３の外周端部のうち、角部に当接するようになっている。 The corner portion holding portion 52 has two diagonal positions (four corners) around the center of the case 30 of the battery cell 3 or the replenishing member main body 41 of the replenishing member 4 in order to stably restrain the battery cell 3 or the replenishing member 4. The four corners of the case 30 of the battery cell 3 or the replenishing member main body 41 of the replenishing member 4 are held. The corner portion holding portion 52 extends from the orthogonal end edges in the Y direction and Z direction at the corner portion of the spacer body 50 to both sides on one side and the other side in the X direction. The inner surface of the corner holding portion 52 is in contact with the corner portion of the outer peripheral end portion of the battery cell 3.

角部保持部５２は、電池セル３又は補充部材４の上側の一対の角部に当接する一対の上側角部保持部５２Ａと、電池セル３又は補充部材４の一対の下側の角部及び底面に当接する下側角部保持部５２Ｂとを備える。角部保持部５２は、隣り合う電池セル３又は補充部材４を位置決めする位置決め部として機能する。 The corner portion holding portion 52 includes a pair of upper corner portion holding portions 52A that are in contact with a pair of upper corner portions of the battery cell 3 or the replenishment member 4, a pair of lower corner portions of the battery cell 3 or the replenishment member 4, and A lower corner holding portion 52B that contacts the bottom surface. The corner holding part 52 functions as a positioning part for positioning the adjacent battery cell 3 or the replenishing member 4.

角部間保持部５３は、スペーサ本体５０の頂部（頂辺）の中央箇所に設けられた頂部保持部５３Ａと、スペーサ本体５０の左右の側部（側辺）の中央箇所に設けられた第一側部保持部５３Ｂ及び第二側部保持部５３Ｃとを備えている。頂部保持部５３Ａ、第一側部保持部５３Ｂ及び第二側部保持部５３Ｃのそれぞれは、Ｘ方向に（の電池セル３又は補充部材４側に）延出する延出片５３０を有する。頂部保持部５３Ａ及び第一側部保持部５３Ｂのそれぞれは、延出片５３０の先端部に、内側に突出する突片５３１を備えている。第二側部保持部５３Ｃは、延出片５３０の先端部に、内側に突出する突起５３２を備えている。 The inter-corner holding portion 53 includes a top holding portion 53A provided at the central portion of the top portion (top side) of the spacer main body 50 and a first portion provided at the central portion of the left and right side portions (side sides) of the spacer main body 50. One side portion holding portion 53B and a second side portion holding portion 53C are provided. Each of the top holding portion 53A, the first side holding portion 53B, and the second side holding portion 53C has an extending piece 530 that extends in the X direction (to the battery cell 3 or the replenishing member 4 side). Each of the top holding portion 53 </ b> A and the first side holding portion 53 </ b> B includes a protruding piece 531 that protrudes inward at the tip of the extending piece 530. The second side holding portion 53 </ b> C includes a protrusion 532 that protrudes inwardly at the tip of the extending piece 530.

図４は、スペーサ５が電池セル３又は補充部材４を保持した状態を示している。また、図６及び図７にも示されているように、電池セル３（のケース３０）又は補充部材４（のケース疑似部４１）の外周端部のうち、四つの角部のそれぞれは、角部保持部５２によって保持されている。頂部は、頂部保持部５３Ａによって保持されている。左右の側部は、第一側部保持部５３Ｂ及び第二側部保持部５３Ｃによって保持されている。電池セル３又は補充部材４の頂部のうち、頂部保持部５３Ａが延出する方向における面（電池セル３のケース３０又は補充部材４のケース疑似部４１におけるスペーサ本体５０との対向面とは反対側の面）には、頂部保持部５３Ａの突片５３１が係止されている。電池セル３又は補充部材４の一方の側部のうち、第一側部保持部５３Ｂが延出する方向における面には、第一側部保持部５３Ｂの突片５３１が係止されている。電池セル３又は補充部材４の他方の側部には、第二側部保持部５３Ｃの突起５３２が当接している。これらにより、電池セル３又は補充部材４は、スペーサ５に保持され、スペーサ５と一体化されている。 FIG. 4 shows a state in which the spacer 5 holds the battery cell 3 or the replenishing member 4. Moreover, as shown also in FIG.6 and FIG.7, each of four corner | angular parts among the outer peripheral edge parts of the battery cell 3 (the case 30) or the supplementary member 4 (the case pseudo | simulation part 41) is as follows. It is held by the corner holding part 52. The top portion is held by the top holding portion 53A. The left and right side portions are held by the first side portion holding portion 53B and the second side portion holding portion 53C. Of the tops of the battery cells 3 or the replenishing member 4, the surface in the direction in which the top holding part 53A extends (opposite to the surface facing the spacer body 50 in the case 30 of the battery cell 3 or the case pseudo part 41 of the replenishing member 4). The protruding piece 531 of the top holding portion 53A is locked to the side surface). The protruding piece 531 of the first side portion holding portion 53B is locked to the surface of the one side portion of the battery cell 3 or the replenishing member 4 in the direction in which the first side portion holding portion 53B extends. A protrusion 532 of the second side holding portion 53C is in contact with the other side portion of the battery cell 3 or the replenishing member 4. Accordingly, the battery cell 3 or the replenishing member 4 is held by the spacer 5 and integrated with the spacer 5.

フレーム７は、図１又は図２に示すように、Ｘ方向における複数の電池セル３の両側に配置され且つＸ方向において複数の電池セル３及び複数のスペーサ５を挟み込む一対の終端部材７０（いわゆるエンドプレート）と、該一対の終端部材７０同士を連結し、複数の電池セル３及び複数のスペーサ５を一体に緊締する連結部材７５とを備えている。つまり、電池セル３とスペーサ５とが一列に整列されている。そして、電池セル３とスペーサ５とは、直線上に積層された状態で、一端の終端部材７０に挟まれて電池積層方向に加圧されている。 As shown in FIG. 1 or FIG. 2, the frame 7 is disposed on both sides of the plurality of battery cells 3 in the X direction and has a pair of termination members 70 (so-called so-called sandwiching the plurality of battery cells 3 and the plurality of spacers 5 in the X direction). An end plate) and a connecting member 75 that connects the pair of terminal members 70 and fastens the plurality of battery cells 3 and the plurality of spacers 5 together. That is, the battery cell 3 and the spacer 5 are aligned in a line. And the battery cell 3 and the spacer 5 are pressurized in the battery stacking direction by being sandwiched between the terminal members 70 at one end while being stacked on a straight line.

終端部材７０は、例えば鋳造によって形成された、例えばアルミなどの金属製である。終端部材７０は、終端部材本体７１と、該終端部材本体７１の下部からＸ方向外方に突出する脚部７２とを備えている。スペーサ本体５０と同様、電池セル３のケース３０がＸ方向から見て矩形状であるのに対応して、終端部材本体７１は、矩形状に形成されている。 The termination member 70 is made of metal such as aluminum formed by casting, for example. The termination member 70 includes a termination member main body 71 and leg portions 72 projecting outward in the X direction from the lower portion of the termination member main body 71. Similarly to the spacer main body 50, the terminal member main body 71 is formed in a rectangular shape corresponding to the rectangular shape of the case 30 of the battery cell 3 when viewed from the X direction.

連結部材７５は、Ｙ方向における複数の電池セル３の両側に一対設けられている。すなわち、連結部材７５は、Ｙ方向の一方側から複数の電池セル３に対向配置される連結部材７５と、Ｙ方向の他方側から複数の電池セル３に対向配置される連結部材７５とを備えている。連結部材７５は、Ｘ方向に沿って延びて互いに間隔を有して平行する一対の横梁部７６（連結部）と、該一対の横梁部７６のＸ方向における一端部同士及び他端部同士を連結する一対の縦梁部７７とを備える。連結部材７５は、全体として、矩形の枠形状を呈している。連結部材７５の一対の横梁部７６は、電池セル３及びスペーサ５のＸ方向に沿う面における、電池セル３のケース３０の中央を中心とした二つの対角位置（四隅）の近傍に配置されている。 A pair of connecting members 75 are provided on both sides of the plurality of battery cells 3 in the Y direction. That is, the connecting member 75 includes a connecting member 75 that is arranged to face the plurality of battery cells 3 from one side in the Y direction, and a connecting member 75 that is arranged to face the plurality of battery cells 3 from the other side in the Y direction. ing. The connecting member 75 includes a pair of cross beam portions 76 (connecting portions) extending along the X direction and parallel to each other, and one end portion and the other end portion of the pair of cross beam portions 76 in the X direction. And a pair of longitudinal beam portions 77 to be connected. The connecting member 75 has a rectangular frame shape as a whole. The pair of horizontal beam portions 76 of the connecting member 75 are disposed in the vicinity of two diagonal positions (four corners) around the center of the case 30 of the battery cell 3 on the surface along the X direction of the battery cell 3 and the spacer 5. ing.

セル監視回路モジュール９は、セル監視回路（図示しない）を回路ケース９０に収容したものである。回路ケース９０は、開口部を有するケース本体９１と、該ケース本体９１の開口部を塞いで密閉する蓋体９２とを備えている。 The cell monitoring circuit module 9 is obtained by housing a cell monitoring circuit (not shown) in a circuit case 90. The circuit case 90 includes a case main body 91 having an opening and a lid 92 that closes and seals the opening of the case main body 91.

以上の構成からなる電池モジュール１は、以下のようにして組み立てられる。つまり、図２に示すように、まず、間にスペーサ５が配置されつつ複数の電池セル３及び補充部材４が積層される。一端及び他端にある電池セル３の外側にもスペーサ５が配置される。さらにその両側に一対の終端部材７０が配置される。一対の終端部材７０間にＸ方向の圧縮力が掛けられた状態で、一対の連結部材７５が複数の電池セル３及び補充部材４にＹ方向から配置される。そして、連結部材７５の各貫通孔に挿通されたボルト８５のネジ部が終端部材７０の各雌ネジに螺入され、複数の電池セル３及び補充部材４とこれらを保持する複数のスペーサ５がフレーム７とともに一体化される。その後、セル監視回路モジュール９が複数の電池セル３にＺ方向から配置されて取り付けられる。このようにして、電池モジュール１は、完成する。 The battery module 1 having the above configuration is assembled as follows. That is, as shown in FIG. 2, first, the plurality of battery cells 3 and the replenishing member 4 are stacked while the spacers 5 are disposed therebetween. Spacers 5 are also arranged outside the battery cells 3 at one end and the other end. Furthermore, a pair of termination | terminus member 70 is arrange | positioned at the both sides. A pair of connecting members 75 are arranged on the plurality of battery cells 3 and the replenishing member 4 from the Y direction in a state where a compressive force in the X direction is applied between the pair of terminal members 70. And the thread part of the volt | bolt 85 inserted in each through-hole of the connection member 75 is screwed in each internal thread of the termination | terminus member 70, and the some battery cell 3 and the replenishment member 4, and the some spacer 5 holding these are provided. It is integrated with the frame 7. Thereafter, the cell monitoring circuit module 9 is arranged and attached to the plurality of battery cells 3 from the Z direction. In this way, the battery module 1 is completed.

以上の構成からなる電池モジュール１では、蓄電モジュール１の電圧又は電気容量に合わせて、電池セル３が配置されるべき位置に補充部材４が配置され、フレーム７が電池セル３を拘束する方向におけるフレーム７の長さが変わらない。よって、蓄電モジュール１の電圧又は電気容量を異にしても、フレーム７を変更することなく構築することができる。つまり、電圧又は電池容量が異なる電池モジュール１において、フレーム７などの拘束用部材を共通化することができる。 In the battery module 1 having the above configuration, the replenishment member 4 is arranged at a position where the battery cell 3 is to be arranged in accordance with the voltage or electric capacity of the power storage module 1, and the frame 7 is in the direction of restraining the battery cell 3. The length of the frame 7 does not change. Therefore, even if the voltage or electric capacity of the power storage module 1 is different, the frame 7 can be constructed without changing. That is, in the battery modules 1 having different voltages or battery capacities, the restraining member such as the frame 7 can be shared.

また、蓄電モジュール１の電圧又は電気容量に合わせて、電池セル３が配置されるべき位置に補充部材４が配置されることにより、その位置を補充部材４で塞ぐことができ、フレーム７が電池セル３を拘束する方向における蓄電モジュール１の長さが変わらない。 Further, the replenishment member 4 is disposed at a position where the battery cell 3 is to be disposed in accordance with the voltage or electric capacity of the power storage module 1, so that the position can be closed by the replenishment member 4, and the frame 7 is a battery. The length of the power storage module 1 in the direction of restraining the cell 3 does not change.

また、補充部材本体４１の剛性は、ケースの剛性と同じ又は略同じである。このため、電池セル３に加えていた外力と同じ条件のまま、電池セル３が配置されるべき位置に補充部材４が配置され、該補充部材４に外力を加えることができる。 The rigidity of the replenishing member main body 41 is the same as or substantially the same as the rigidity of the case. For this reason, the replenishment member 4 is arrange | positioned in the position where the battery cell 3 should be arrange | positioned with the same conditions as the external force applied to the battery cell 3, and external force can be applied to this replenishment member 4.

また、補充部材本体４１は、電池セル３に面対向する対向面４２を有し、該対向面４２は、面対向する電池セル３の面以上の広さを有する。このため、補充部材４が電池セル３に面接触することによって、補充部材４から電池セル３に加わる外力は、電池セル３の面に均等に加わるようになる。 The replenishing member main body 41 has a facing surface 42 that faces the battery cell 3, and the facing surface 42 is wider than the surface of the facing battery cell 3. For this reason, when the replenishing member 4 comes into surface contact with the battery cell 3, the external force applied from the replenishing member 4 to the battery cell 3 is equally applied to the surface of the battery cell 3.

また、補充部材本体４１は、ケース３０の外形に即して形成された枠４３と、該枠４３内に配置された梁部４４とを備える。このため、電池セル３のケース３０の外形を模しつつ、補充部材本体４１の強度を保つことができる。更に、補充部材本体４１の重量が軽量化される。 The replenishing member main body 41 includes a frame 43 formed in accordance with the outer shape of the case 30 and a beam portion 44 disposed in the frame 43. For this reason, the strength of the supplementary member main body 41 can be maintained while simulating the outer shape of the case 30 of the battery cell 3. Furthermore, the weight of the replenishing member main body 41 is reduced.

また、補充部材４は、電池セル３と列をなし、該列の中央寄りに配置される。このため、蓄電モジュール１内に電池セル３と補充部材４とを並べて配置することにより、隣り合う電池セル３間で互いに熱を高め合って、複数の電池セル３がなす列の中で最も熱を蓄えやすい列の中央寄りに位置に補充部材４が配置されることで、蓄電モジュール１全体の温度上昇が抑えられる。また、電池セル３と異なる重量の補充部材４を配置しても、蓄電モジュール１１内における整列方向における重心位置がずれず、重量バランスが変わらない。 The replenishment member 4 forms a row with the battery cells 3 and is arranged closer to the center of the row. For this reason, by arranging the battery cell 3 and the replenishing member 4 side by side in the power storage module 1, heat is mutually increased between the adjacent battery cells 3, and the most heat in the row formed by the plurality of battery cells 3. The supplementary member 4 is disposed at a position closer to the center of the column where it is easy to store the temperature, so that the temperature increase of the entire power storage module 1 can be suppressed. Even if the replenishment member 4 having a weight different from that of the battery cell 3 is arranged, the position of the center of gravity in the alignment direction in the power storage module 11 is not shifted, and the weight balance does not change.

また、補充部材４は、電池セル３間に配置される。このため、蓄電モジュール１内に電池セル３と補充部材４とを並べて配置することにより、隣り合う電池セル３間で互いに熱を高め合って熱を蓄えやすい位置に補充部材４が配置されることで、蓄電モジュール１全体の温度上昇が抑えられる。 The replenishing member 4 is disposed between the battery cells 3. For this reason, by arranging the battery cell 3 and the replenishment member 4 side by side in the power storage module 1, the replenishment member 4 is disposed at a position where heat is increased between the adjacent battery cells 3 and heat can be easily stored. Thus, the temperature increase of the entire power storage module 1 can be suppressed.

尚、本発明に係る蓄電モジュールは、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更が可能である。 In addition, the electrical storage module which concerns on this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

例えば、上記実施形態においては、隣接部材として、スペーサ５が設けられている。しかしながら、これに限定されるものではない。隣接部材は、終端部材であってもよい。 For example, in the above embodiment, the spacer 5 is provided as the adjacent member. However, the present invention is not limited to this. The adjacent member may be a termination member.

また、上記実施形態においては、補充部材本体４１の厚さは、ケース３０の厚さと同じ厚さである。しかしながら、これに限定されるものではない。蓄電モジュールには、蓄電素子と該蓄電素子と並ぶスペーサとが配置される領域を有し、補充部材が、蓄電素子とスペーサとが配置されるべき位置に配置される場合、フレームによる蓄電素子の拘束方向における補充部材の本体の長さＬは、下記の関係式（１）を満たす値であってもよい。なお、Ｌ１は、Ｘ方向におけるケースの長さとし、自然数ｎは、蓄電素子が配置されるべき位置に配置される該蓄電素子の数量とし、Ｌ２は、Ｘ方向においてスペーサがケースを離間する長さとする。具体的には、Ｌ２は、スペーサの本体が溝形成部を有するものである場合、この溝形成部のＸ方向の厚さに相当し、蓄電素子を保持したときに本体の溝形成部が変形する場合、この変形後の溝形成部のＸ方向の厚さに相当する。スペーサの本体が溝を有さない平板状のものである場合、Ｌ２は、この本体の板厚に相当する。言い換えると、Ｌ２は、スペーサ本体のＸ方向の厚さである。
Ｌ＝Ｌ１×ｎ＋Ｌ２×（ｎ＋１）・・・式（１） Further, in the above embodiment, the thickness of the replenishing member main body 41 is the same as the thickness of the case 30. However, the present invention is not limited to this. The power storage module has a region in which the power storage element and a spacer aligned with the power storage element are disposed, and when the supplementary member is disposed at a position where the power storage element and the spacer are to be disposed, The length L of the main body of the replenishing member in the restraining direction may be a value that satisfies the following relational expression (1). Note that L1 is the length of the case in the X direction, the natural number n is the number of the power storage elements disposed at the positions where the power storage elements are to be disposed, and L2 is the length by which the spacer separates the case in the X direction. To do. Specifically, L2 corresponds to the thickness of the groove forming portion in the X direction when the spacer main body has a groove forming portion, and the groove forming portion of the main body is deformed when the power storage element is held. In this case, this corresponds to the thickness in the X direction of the groove forming portion after the deformation. When the spacer main body is a flat plate having no groove, L2 corresponds to the thickness of the main body. In other words, L2 is the thickness of the spacer body in the X direction.
L = L1 × n + L2 × (n + 1) (1)

この場合、一つの補充部材を、一つ以上のｎ個の蓄電素子及びこれらの蓄電素子を挟んで配置される一つ以上の（ｎ＋１）個のスペーサが配置されるべき位置に配置し、その位置を補充部材で塞ぐことができ、フレームが蓄電素子を拘束する方向における蓄電モジュールの長さが変わらない。 In this case, one replenishment member is disposed at a position where one or more n power storage elements and one or more (n + 1) spacers disposed between the power storage elements are to be disposed, The position can be closed with the supplement member, and the length of the power storage module in the direction in which the frame restrains the power storage element does not change.

また、フレームによる蓄電素子の拘束方向における補充部材の本体の長さＬは、下記の関係式（２）を満たす値であってもよい。
Ｌ＝Ｌ１×ｎ＋Ｌ２×（ｎ−１）・・・式（２） Further, the length L of the main body of the replenishing member in the restraining direction of the power storage element by the frame may be a value satisfying the following relational expression (2).
L = L1 × n + L2 × (n−1) (2)

この場合、本実施形態に係る補充部材のように、一つの補充部材を、一つの蓄電素子が配置されるべき位置に配置される場合に加え、一つの補充部材を、二つ以上のｎ個の蓄電素子及びこれらの蓄電素子に挟まれる一つ以上の（ｎ−１）個のスペーサが配置されるべき位置に配置する場合においても、その位置を補充部材で塞ぐことができ、いずれの場合においても、フレームが蓄電素子を拘束する方向における蓄電モジュールの長さが変わらない。 In this case, like the replenishing member according to the present embodiment, in addition to the case where one replenishing member is disposed at a position where one power storage element is to be disposed, one replenishing member is provided with two or more n replenishing members. In the case where the power storage elements and one or more (n-1) spacers sandwiched between the power storage elements are disposed at positions where the power storage elements are to be disposed, the positions can be closed with the replenishment member. However, the length of the power storage module in the direction in which the frame restrains the power storage element does not change.

また、フレームによる蓄電素子の拘束方向における補充部材の本体の長さＬは、下記の関係式（３）を満たす値であってもよい。
Ｌ＝Ｌ１×ｎ＋Ｌ２×ｎ・・・式（３） Further, the length L of the main body of the replenishing member in the restraining direction of the power storage element by the frame may be a value satisfying the following relational expression (3).
L = L1 × n + L2 × n (3)

この場合、一つの補充部材を、一つ以上のｎ個の蓄電素子及びこれらの蓄電素子の一方の面に並んで配置される一つ以上のｎ個のスペーサが配置されるべき位置に配置し、その位置を補充部材で塞ぐことができ、フレームが蓄電素子を拘束する方向における蓄電モジュールの長さが変わらない。 In this case, one supplementary member is arranged at a position where one or more n power storage elements and one or more n spacers arranged side by side on one surface of these power storage elements are to be disposed. The position can be closed by the replenishing member, and the length of the power storage module in the direction in which the frame restrains the power storage element does not change.

補充部材が蓄電素子のみが配置されるべき位置に配置される場合、フレームによる蓄電素子の拘束方向における補充部材の本体の長さＬは、下記の関係式（４）を満たす値であってもよい。
Ｌ＝Ｌ１×ｎ・・・式（４） When the replenishment member is disposed at a position where only the storage element is to be disposed, the length L of the body of the replenishment member in the restraining direction of the storage element by the frame is a value satisfying the following relational expression (4) Good.
L = L1 × n (4)

この場合、一つの補充部材で一つ以上のｎ個の蓄電素子が配置されるべき位置に配置し、その位置を補充部材で塞ぐことができ、フレームが蓄電素子を拘束する方向における蓄電モジュールの長さが変わらない。 In this case, one replenishment member can be disposed at a position where one or more n power storage elements are to be disposed, and the position can be closed by the replenishment member. The length does not change.

また、上記実施形態においては、補充部材本体４１の対向面４２が面対向する電池セル３の面と同じ広さを有する。しかしながら、これに限定されるものではない。対向面は、面対向する蓄電素子の面以上の広さを有していてもよい。 Moreover, in the said embodiment, the opposing surface 42 of the replenishing member main body 41 has the same area as the surface of the battery cell 3 which faces the surface. However, the present invention is not limited to this. The facing surface may have a width larger than that of the surface of the power storage element facing the surface.

また、上記実施形態においては、補充部材４は、電池セル３と列をなし、該列の中央寄りに配置されている。しかしながら、これに限定されるものではない。補充部材は、蓄電素子と列をなし、該列の端に配置されていてもよい。そのために、補充部材は、蓄電素子間に配置されていなくてもよい。 Moreover, in the said embodiment, the replenishment member 4 comprises the battery cell 3, and is arrange | positioned near the center of this row | line | column. However, the present invention is not limited to this. The replenishment member may be arranged in a row with the power storage elements and arranged at the end of the row. Therefore, the replenishment member may not be disposed between the power storage elements.

また、上記実施形態においては、補充部材４は、一つの電池セル３が配置されるべき位置に一つ設けられている。しかしながら、これに限定されるものではない。補充部材は、二つ以上の蓄電素子が配置されるべき位置に二つ以上設けられていてもよい。この場合、偶数個の蓄電素子が配置されるべき位置に、偶数個の電池素子（及びスペーサ）のＸ方向の厚さの補充部材が配置されることが好ましい。補充部材を挟んで配置される蓄電素子間の電気的な接続にＺ形状のバスバーを用いる必要がなく、蓄電素子の電極端子間の距離に相当する長さの直線状のバスバーにより接続することができる。 Moreover, in the said embodiment, the one supplementary member 4 is provided in the position where the one battery cell 3 should be arrange | positioned. However, the present invention is not limited to this. Two or more supplementary members may be provided at positions where two or more power storage elements are to be disposed. In this case, it is preferable that a replenishment member having a thickness in the X direction of the even number of battery elements (and spacers) is disposed at a position where the even number of power storage elements are to be disposed. There is no need to use a Z-shaped bus bar for electrical connection between the electricity storage elements arranged with the replenishment member interposed therebetween, and the connection can be made with a linear bus bar having a length corresponding to the distance between the electrode terminals of the electricity storage element. it can.

また、上記実施形態においては、補充部材４は、隣接する電池セル３と接続されていない。しかしながら、これに限定されるものではない。補充部材は、隣接する蓄電素子と電気的に接続されていてもよい。この場合、各蓄電素子は、電極端子との電気的な接続を補充部材の導電部に対して行うことができる。蓄電素子同士の位置関係に制限されることなく蓄電素子間の電気的な接続を行うことができるようになる。 In the above embodiment, the replenishment member 4 is not connected to the adjacent battery cell 3. However, the present invention is not limited to this. The replenishment member may be electrically connected to the adjacent power storage element. In this case, each power storage element can make an electrical connection with the electrode terminal to the conductive portion of the supplementary member. Electrical connection between the storage elements can be performed without being limited by the positional relationship between the storage elements.

このために、補充部材は、ケースから突出した電極端子が電気的に接続される導電部を有することが好ましい。導電部は、蓄電素子における電極端子が設けられる位置に対応していることが好ましい。つまり、導電部は、正極側の電極端子が設けられた位置と負極側の電極端子が設けられた位置とのそれぞれに電極端子を備え、補充部材の本体内又は側面に沿って、正極側の電極端子と負極側の電極端子とを電気的に接続する導電部材を備えていてもよい。このようにすることにより、バスバーも共用することができる。 For this reason, it is preferable that the supplementary member has a conductive portion to which the electrode terminal protruding from the case is electrically connected. The conductive portion preferably corresponds to a position where the electrode terminal in the power storage element is provided. In other words, the conductive portion includes electrode terminals at each of the position where the positive electrode terminal is provided and the position where the negative electrode terminal is provided. A conductive member for electrically connecting the electrode terminal and the electrode terminal on the negative electrode side may be provided. By doing so, the bus bar can also be shared.

また、上記実施形態においては、更に、流路を流れる冷却媒体の流れを妨げる規制部材を備えていてもよい。規制部材は、補充部材に隣接する隣接部材が形成する流路に設けられる。この場合、発熱体を収容していない補充部材は冷却する必要がないため、規制部材が補充部材に隣接する流路に流れる冷却媒体の流れを妨げて、他の流路に冷却媒体が集中して流れるようにすることができる。そのため、蓄電モジュール全体の冷却性能を上げることができる。なお、規制部材は、流路を完全に塞ぐものであってもよいし、その一部を遮るものであってもよい。 Moreover, in the said embodiment, you may provide the regulating member which prevents the flow of the cooling medium which flows through a flow path further. The regulating member is provided in a flow path formed by an adjacent member adjacent to the replenishing member. In this case, since the replenishing member that does not contain the heating element does not need to be cooled, the restricting member prevents the flow of the cooling medium flowing through the flow path adjacent to the replenishing member, and the cooling medium concentrates on the other flow paths. Can be made to flow. Therefore, the cooling performance of the entire power storage module can be improved. The restricting member may completely block the flow path, or may block a part thereof.

また、上記実施形態においては、補充部材４は、側面が格子状に形成された本体４１を有している。しかしながら、これに限定されるものではない。補充部材の本体の側面が蜂の巣状に形成することにより、本体の剛性が高められていてもよい。また、本体の側面がケースと同様に平面形状に形成されており、例えば、本体が矩形箱形状であってもよい。スペーサの流路に流す冷却媒体の流れに乱流が発生しにくくなり、冷却効率が維持される。また、補充部材は、格子状の本体に、隣接部材の本体における流路形成部と当接する部分に平面状の板部材を取り付けるなどして表面のみを平面形状にしてもよい。この場合、補充部材は、更に軽量化される。 Moreover, in the said embodiment, the replenishment member 4 has the main body 41 by which the side surface was formed in the grid | lattice form. However, the present invention is not limited to this. The rigidity of the main body may be increased by forming the side surface of the main body of the replenishing member in a honeycomb shape. Further, the side surface of the main body is formed in a planar shape like the case, and for example, the main body may have a rectangular box shape. Turbulent flow is less likely to occur in the flow of the cooling medium flowing through the flow path of the spacer, and the cooling efficiency is maintained. In addition, the replenishing member may have a flat surface only by attaching a flat plate member to a portion of the main body of the adjacent member that is in contact with the flow path forming portion on the lattice-shaped main body. In this case, the supplementary member is further reduced in weight.

また、上記実施形態においては、補充部材４は、電池セル３のケース３０の剛性と同じ又は略同じ剛性を有している。しかしながら、これに限定されるものではない。補充部材は、蓄電素子のケースの剛性より低くてもよい。具体的には、補充部材は、樹脂製又は低剛性の物質で成形されていてもよい。この場合、蓄電モジュールに加わる外力が補充部材に集中するようになり、蓄電素子に加わる外力を低減し、蓄電素子を保護することができる。 In the above embodiment, the replenishment member 4 has the same or substantially the same rigidity as the case 30 of the battery cell 3. However, the present invention is not limited to this. The supplementary member may be lower than the rigidity of the case of the power storage element. Specifically, the replenishing member may be made of a resin or a low-rigidity substance. In this case, the external force applied to the power storage module is concentrated on the supplementary member, so that the external force applied to the power storage element can be reduced and the power storage element can be protected.

また、上記実施形態においては、補充部材４は、電池セル３と同様に他の部材と独立して構成されていた。しかしながら、これに限定されるものではない。例えば、補充部材は、連結部材や終端部材などのフレームと一体的に形成されていてもよいし、スペーサと一体に形成されていてもよい。 Moreover, in the said embodiment, the replenishment member 4 was comprised independently of other members similarly to the battery cell 3. As shown in FIG. However, the present invention is not limited to this. For example, the replenishing member may be formed integrally with a frame such as a connecting member or a terminal member, or may be formed integrally with a spacer.

また、上記実施形態においては、電池モジュール１は、電池セル３と補充部材４とが組み合わされて構成されている。しかしながら、これに限定されるものではない。蓄電モジュールは、補充部材のみから構成されていてもよい。補充部材のみからなる（蓄電）モジュールは、複数の蓄電モジュールを備える蓄電装置において、外力が加わりやすい位置に配置されて他の蓄電モジュールを保護し、又は高温となりやすい位置に配置されて他の蓄電モジュールに対する冷却効率を上げることができる。 Moreover, in the said embodiment, the battery module 1 is comprised by combining the battery cell 3 and the supplementary member 4. As shown in FIG. However, the present invention is not limited to this. The power storage module may be composed of only a supplementary member. A (power storage) module including only a replenishment member is disposed at a position where an external force is easily applied in a power storage device including a plurality of power storage modules to protect other power storage modules, or is disposed at a position where high temperature is likely to occur. The cooling efficiency for the module can be increased.

また、上記実施形態においては、溝形成部としての流路形成部５４は、スペーサ本体５０の両面に設けられている。しかしながら、これに限定されるものではない。溝形成部は、本体の一方の面のみに設けられていてもよい。 In the above embodiment, the flow path forming portions 54 as the groove forming portions are provided on both surfaces of the spacer body 50. However, the present invention is not limited to this. The groove forming part may be provided only on one surface of the main body.

また、上記実施形態においては、スペーサ５のスペーサ本体５０は、流路を形成する流路形成部５４を有する。しかしながら、これに限定されるものではない。隣接部材の本体は、流路ではない溝部を形成する溝形成部を有していてもよい。更に、隣接部材の本体は、溝形成部を有していない、平板状のものであってもよい。また、流路は、空気を通す風路に限らず、空気以外の冷却媒体を通すものが含まれる。 Moreover, in the said embodiment, the spacer main body 50 of the spacer 5 has the flow-path formation part 54 which forms a flow path. However, the present invention is not limited to this. The main body of the adjacent member may have a groove forming part that forms a groove that is not a flow path. Furthermore, the main body of the adjacent member may have a flat plate shape that does not have a groove forming portion. Further, the flow path is not limited to the air path through which air passes, but includes a path through which a cooling medium other than air passes.

また、上記実施形態においては、リチウムイオン二次電池について説明した。しかしながら、電池の種類や大きさ（容量）は任意である。 Moreover, in the said embodiment, the lithium ion secondary battery was demonstrated. However, the type and size (capacity) of the battery are arbitrary.

また、本発明は、リチウムイオン二次電池に限定されるものではない。本発明は、種々の二次電池、その他、一次電池や、電気二重層キャパシタ等のキャパシタにも適用可能である。 Further, the present invention is not limited to the lithium ion secondary battery. The present invention is also applicable to various secondary batteries, other primary batteries, and capacitors such as electric double layer capacitors.

１…電池モジュール（蓄電モジュール）、３…電池セル（蓄電素子）、３０…ケース、３１…ケース本体、３２…蓋体、３３…電極端子、３４，３６…バスバー、４…補充部材、４１…補充部材本体、４２…対向面、４３…枠、４４…梁部、５…スペーサ（隣接部材）、５０…スペーサ本体（本体）、５１…保持部、５２…角部保持部、５３…角部間保持部、５３Ａ…頂部保持部、５３Ｂ…第一側部保持部、５３Ｃ…第二側部保持部、５３０…延出片、５３１…突片、５３２…突起、５３３…開口、５４…流路形成部、５４０…溝部、５４２…底部、５４３…内壁部、５４１…凸条、５４４…頂部、５４５…側壁部、７…フレーム、７０…終端部材、７１…終端部材本体、７２…脚部、７５…連結部材、７６…横梁部、７７…縦梁部、８５…ボルト、９…セル監視回路（ＣＭＵ）モジュール、９０…回路ケース、９１…ケース本体、９２…蓋体 DESCRIPTION OF SYMBOLS 1 ... Battery module (electric storage module), 3 ... Battery cell (electric storage element), 30 ... Case, 31 ... Case main body, 32 ... Cover body, 33 ... Electrode terminal, 34, 36 ... Bus bar, 4 ... Replenishing member, 41 ... Replenishing member main body, 42 ... opposing surface, 43 ... frame, 44 ... beam part, 5 ... spacer (adjacent member), 50 ... spacer main body (main body), 51 ... holding part, 52 ... corner holding part, 53 ... corner part Intermediate holding portion, 53A ... Top holding portion, 53B ... First side portion holding portion, 53C ... Second side portion holding portion, 530 ... Extension piece, 531 ... Projection piece, 532 ... Protrusion, 533 ... Opening, 54 ... Flow Road forming part, 540 ... groove part, 542 ... bottom part, 543 ... inner wall part, 541 ... ridge, 544 ... top part, 545 ... side wall part, 7 ... frame, 70 ... termination member, 71 ... termination member body, 72 ... leg part 75 ... Connecting member, 76 ... Horizontal beam portion, 77 ... Vertical beam portion, 85 ... Belt, 9 ... cell monitor circuit (CMU) module, 90 ... circuit case, 91 ... case body, 92 ... lid

Claims

A frame capable of restraining the storage element;
A replenishment member disposed at a position where the power storage element is to be disposed;
A power storage module.

The power storage module according to claim 1, wherein the replenishing member includes a main body that is formed to resemble a case of a power storage element having a case in which an electrode body is accommodated.

A region where the power storage element and a spacer aligned with the power storage element are to be disposed;
In the replenishing member, the length L of the main body in the restraining direction of the power storage element by the frame is:
The length of the case in the same direction is L1,
The quantity of the electricity storage elements arranged at the position where the electricity storage element and the spacer are to be arranged is n,
L = L1 × n + L2 × (n + 1), which is a value obtained from any one of the following formulas (1) to (3), where L2 is the length that the spacer separates the case in the same direction. ) ... Formula (1)
L = L1 × n + L2 × (n−1) (2)
L = L1 × n + L2 × n (3)
The power storage module according to claim 2.

The power storage module according to claim 2, wherein the rigidity of the main body is the same as or substantially the same as the rigidity of the case.

Comprising the electricity storage element,
The main body has a facing surface facing the power storage element,
The power storage module according to any one of claims 2 to 4, wherein the facing surface has a width equal to or larger than a surface of the power storage element facing the surface.

The body is
A frame formed according to the outer shape of the case;
The power storage module according to any one of claims 2 to 5, further comprising a beam portion arranged in the frame.

Comprising the electricity storage element,
The power storage module according to any one of claims 1 to 6, wherein the supplementary member forms a column with the power storage element and is disposed closer to a center of the column.

Comprising the electricity storage element,
The power storage module according to any one of claims 1 to 7, wherein the supplementary member is disposed between the power storage elements.

A power storage element having an electrode terminal connected to the electrode body,
The power storage module according to any one of claims 2 to 6, wherein the supplementary member includes a conductive portion to which the electrode terminal protruding from the case is electrically connected.

An adjacent member that forms a flow path for passing a cooling medium between the storage element and the storage element;
A regulating member that prevents the flow of the cooling medium flowing through the flow path,
The power storage module according to claim 1, wherein the regulating member is provided in the flow path formed by the adjacent member adjacent to the replenishing member.