JP2019200884A - Power storage device - Google Patents

Power storage device Download PDF

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JP2019200884A
JP2019200884A JP2018093783A JP2018093783A JP2019200884A JP 2019200884 A JP2019200884 A JP 2019200884A JP 2018093783 A JP2018093783 A JP 2018093783A JP 2018093783 A JP2018093783 A JP 2018093783A JP 2019200884 A JP2019200884 A JP 2019200884A
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power storage
storage element
electrode terminal
storage device
electrode
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正稔 大島
Masatoshi Oshima
正稔 大島
健吾 神戸
Kengo Kambe
健吾 神戸
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Kawamura Electric Inc
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Kawamura Electric Inc
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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

Abstract

To provide a power storage device capable of reducing a stress applied to an electrode terminal when bonding the electrode terminal.SOLUTION: A power storage device 10 is formed by a structure that electrode terminals 201 and 211 of power storage elements 20 and 21 laminated and arranged in a Z-axial direction are connected. The electrode terminal 201 provided so as to be projected from a battery main body 200 of the power storage element 20 and the electrode terminal 211 provided so as to be projected from the battery main body 210 of the power storage element 21 are oppositely arranged in the Z-axial direction. In the Z-axial direction, both surfaces 201a and 211a which are not opposite in the electrode terminal 201 of the power storage element 20 and electrode terminal 211 of the power storage element 21 are folded and bonded.SELECTED DRAWING: Figure 1

Description

本開示は、蓄電装置に関する。   The present disclosure relates to a power storage device.

従来、下記の特許文献１に記載の蓄電装置がある。特許文献１に記載の蓄電装置は、複数のラミネート型の蓄電素子が直列接続された構造からなる。蓄電素子の容器には、２枚の同一形状のラミネートフィルムが使用されている。ラミネートフィルムの略中央部には、断面直角形状の窪みが形成されている。２枚のラミネートフィルムは、それぞれの窪みの形成された部分が互いに逆方向に向かい合っている。２枚のラミネートフィルムのそれぞれの窪みにより、電極群を収容する収容部が形成されている。蓄電素子の正極端子及び負極端子のいずれか一方の電極端子が収容部の一辺から導出されており、いずれか他方の電極端子が対向する辺から導出されている。隣り合う蓄電素子のそれぞれの電極端子が接合部において直接接合されている。   Conventionally, there is a power storage device described in Patent Document 1 below. The power storage device described in Patent Document 1 has a structure in which a plurality of laminate-type power storage elements are connected in series. Two laminated films of the same shape are used for the container of the electricity storage element. A recess having a right-angle cross section is formed in the substantially central portion of the laminate film. In the two laminated films, the portions where the depressions are formed face each other in opposite directions. A housing portion for housing the electrode group is formed by the depressions of the two laminate films. One of the positive electrode terminal and the negative electrode terminal of the power storage element is led out from one side of the housing portion, and the other electrode terminal is led out from the opposite side. Each electrode terminal of the adjacent power storage element is directly joined at the joint.

特開２００８−２４３４１０号公報JP 2008-243410 A

ところで、特許文献１に記載の蓄電装置では、隣り合う蓄電素子のそれぞれの電極端子を接合する際に、それぞれの電極端子を接合治具により蓄電素子の積層方向に挟み込む必要がある。この際に電極端子に加わる力により、蓄電素子の電池本体に接合されている電極端子の基端部に応力が加わる。この電極端子の基端部に加わる応力が蓄電素子の電池性能に悪影響を及ぼすおそれがある。   By the way, in the power storage device described in Patent Document 1, when electrode terminals of adjacent power storage elements are joined, it is necessary to sandwich each electrode terminal in the stacking direction of the power storage elements by a joining jig. At this time, stress is applied to the base end portion of the electrode terminal joined to the battery body of the electricity storage element due to the force applied to the electrode terminal. The stress applied to the base end portion of the electrode terminal may adversely affect the battery performance of the storage element.

本開示は、こうした実情に鑑みてなされたものであり、その目的は、電極端子の接合時に電極端子に加わる応力を減少させることの可能な蓄電装置を提供することにある。   The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide a power storage device capable of reducing stress applied to the electrode terminals when the electrode terminals are joined.

上記課題を解決する蓄電装置は、所定方向に積層して配置される複数の蓄電素子の電極端子が接続された構造からなる蓄電装置であって、所定方向に隣り合う２つの蓄電素子を第１蓄電素子及び第２蓄電素子とするとき、第１蓄電素子の電池本体から突出するように設けられる電極端子と、第２蓄電素子の電池本体から突出するように設けられる電極端子とが所定方向において対向して配置されている。所定方向において第１蓄電素子の電極端子及び第２蓄電素子の電極端子のそれぞれの対向していない面同士が折り曲げられて接合されている。   A power storage device that solves the above problem is a power storage device having a structure in which electrode terminals of a plurality of power storage elements arranged in a predetermined direction are connected to each other. When the power storage element and the second power storage element are used, an electrode terminal provided to protrude from the battery body of the first power storage element and an electrode terminal provided to protrude from the battery body of the second power storage element are in a predetermined direction. Opposed to each other. The non-opposing surfaces of the electrode terminals of the first energy storage element and the electrode terminals of the second energy storage element are bent and joined in a predetermined direction.

この構成によれば、第１蓄電素子と第２蓄電素子とを水平方向に並べた状態で、それらの電極端子同士を接合させることができる。これにより、所定方向に積層配置される第１蓄電素子及び第２蓄電素子のそれぞれの電極端子を挟み込んで接合する場合と比較すると、電極端子同士の接合時にそれらに加わる応力を減少させることができる。   According to this configuration, the electrode terminals can be joined together in a state where the first power storage element and the second power storage element are arranged in the horizontal direction. Thereby, compared with the case where it sandwiches and joins each electrode terminal of the 1st electrical storage element arranged in a predetermined direction, and the 2nd electrical storage element, the stress added to them at the time of joining of electrode terminals can be reduced. .

上記の蓄電装置において、第１蓄電素子の電極端子と第２蓄電素子の電極端子との接合部分に設けられる接合部材を更に備えることが好ましい。
この構成によれば、接合部材に電圧センサの端子等を接続することにより、電圧の検出等が可能となる。 In the above power storage device, it is preferable to further include a bonding member provided at a bonding portion between the electrode terminal of the first power storage element and the electrode terminal of the second power storage element.
According to this configuration, voltage detection or the like can be performed by connecting a voltage sensor terminal or the like to the joining member.

上記の蓄電装置において、第１蓄電素子の電極端子及び第２蓄電素子の電極端子の少なくとも一方に端子接続部が形成されていることが好ましい。
この構成によれば、端子接続部に電圧センサの端子等を接続することにより、電圧の検出等が可能となる。 In the above power storage device, it is preferable that a terminal connection portion is formed on at least one of the electrode terminal of the first power storage element and the electrode terminal of the second power storage element.
According to this configuration, the voltage can be detected by connecting the terminal of the voltage sensor to the terminal connection portion.

上記課題を解決する蓄電装置は、所定方向に積層して配置される複数の蓄電素子の電極端子が接続された構造からなる蓄電装置であって、所定方向に隣り合う２つの蓄電素子を第１蓄電素子及び第２蓄電素子とするとき、第１蓄電素子の電池本体から突出するように設けられる電極端子と、第２蓄電素子の電池本体から突出するように設けられる電極端子とが所定方向において対向して配置されている。蓄電装置は、接合部材を備える。接合部材は、第１蓄電素子の電極端子と第２蓄電素子の電極端子との間に配置され、第１蓄電素子の電極端子と第２蓄電素子の電極端子にそれぞれ接合されている。   A power storage device that solves the above problem is a power storage device having a structure in which electrode terminals of a plurality of power storage elements arranged in a predetermined direction are connected to each other. When the power storage element and the second power storage element are used, an electrode terminal provided to protrude from the battery body of the first power storage element and an electrode terminal provided to protrude from the battery body of the second power storage element are in a predetermined direction. Opposed to each other. The power storage device includes a joining member. The joining member is disposed between the electrode terminal of the first power storage element and the electrode terminal of the second power storage element, and is joined to the electrode terminal of the first power storage element and the electrode terminal of the second power storage element.

この構成によれば、第１蓄電素子と第２蓄電素子とを水平方向に並べた状態で、それらの電極端子同士を接合部材により接合させることができる。これにより、第１蓄電素子及び第２蓄電素子のそれぞれの電極端子を所定方向に挟み込んで接合する場合と比較すると、電極端子同士の接合時に電極端子に加わる応力を減少させることができる。   According to this configuration, the electrode terminals can be bonded to each other by the bonding member in a state where the first power storage element and the second power storage element are arranged in the horizontal direction. Thereby, compared with the case where each electrode terminal of a 1st electrical storage element and a 2nd electrical storage element is inserted | pinched and joined to a predetermined direction, the stress added to an electrode terminal at the time of joining of electrode terminals can be reduced.

上記の蓄電装置において、接合部材は、コ字状に折り曲げられた部材からなり、接合部材の一方の側壁部は、第１蓄電素子の電極端子に接合され、接合部材の他方の側壁部は、第２蓄電素子の電極端子に接合されていることが好ましい。
この構成によれば、接合部材そのものが折れ曲がることにより第１蓄電素子及び第２蓄電素子のそれぞれの電極端子に加わる応力を更に減少させることができる。 In the above power storage device, the bonding member is formed of a member bent in a U shape, one side wall portion of the bonding member is bonded to the electrode terminal of the first power storage element, and the other side wall portion of the bonding member is It is preferable to be joined to the electrode terminal of the second power storage element.
According to this configuration, the stress applied to the electrode terminals of the first power storage element and the second power storage element can be further reduced by bending the bonding member itself.

上記の蓄電装置において、接合部材において一方の側壁部及び他方の側壁部を連結する連結部は、第１蓄電素子の電極端子及び第２蓄電素子の電極端子のそれぞれの先端部の間に配置されていることが好ましい。
この構成によれば、第１蓄電素子及び第２蓄電素子を電極端子の突出方向に並べた上で、それらの電極端子を接合部材により接合することができる。 In the above power storage device, the connecting portion that connects the one side wall portion and the other side wall portion in the joining member is disposed between the respective tip end portions of the electrode terminal of the first power storage element and the electrode terminal of the second power storage element. It is preferable.
According to this structure, after arranging the 1st electrical storage element and the 2nd electrical storage element in the protrusion direction of an electrode terminal, those electrode terminals can be joined by a joining member.

上記の蓄電装置において、接合部材において一方の側壁部及び他方の側壁部を連結する連結部は、第１蓄電素子の電極端子及び第２蓄電素子の電極端子のそれぞれの側部の間に配置されていることが好ましい。
この構成によれば、第１蓄電素子及び第２蓄電素子を電極端子の突出方向に直交する方向に並べた上で、それらの電極端子を接合部材により接合することができる。 In the above power storage device, the connecting portion that connects the one side wall portion and the other side wall portion in the joining member is disposed between the respective side portions of the electrode terminal of the first power storage element and the electrode terminal of the second power storage element. It is preferable.
According to this structure, after arranging the 1st electrical storage element and the 2nd electrical storage element in the direction orthogonal to the protrusion direction of an electrode terminal, those electrode terminals can be joined by a joining member.

本開示によれば、電極端子の接合時に電極端子に加わる応力を減少させることの可能な蓄電装置を提供できる。   ADVANTAGE OF THE INVENTION According to this indication, the electrical storage apparatus which can reduce the stress added to an electrode terminal at the time of joining of an electrode terminal can be provided.

図１は、第１実施形態の蓄電装置の斜視構造を示す斜視図である。FIG. 1 is a perspective view illustrating a perspective structure of the power storage device according to the first embodiment. 図２は、第１実施形態の電極端子の接合部分の断面構造を示す断面図である。FIG. 2 is a cross-sectional view showing a cross-sectional structure of the joint portion of the electrode terminal of the first embodiment. 図３は、第１実施形態の蓄電装置の製造工程の一部を示す斜視図である。FIG. 3 is a perspective view illustrating a part of the manufacturing process of the power storage device of the first embodiment. 図４は、第１実施形態の蓄電装置の製造工程の一部を示す断面図である。FIG. 4 is a cross-sectional view illustrating a part of the manufacturing process of the power storage device of the first embodiment. 図５は、参考例の蓄電装置の製造工程の一部を示す斜視図である。FIG. 5 is a perspective view illustrating a part of the manufacturing process of the power storage device of the reference example. 図６は、第２実施形態の蓄電装置の斜視構造を示す斜視図である。FIG. 6 is a perspective view showing a perspective structure of the power storage device of the second embodiment. 図７は、第３実施形態の蓄電装置の斜視構造を示す斜視図である。FIG. 7 is a perspective view showing a perspective structure of the power storage device of the third embodiment. 図８は、第３実施形態の蓄電装置の製造工程の一部を示す斜視図である。FIG. 8 is a perspective view illustrating a part of the manufacturing process of the power storage device of the third embodiment. 図９は、第４実施形態の蓄電装置の斜視構造を示す斜視図である。FIG. 9 is a perspective view showing a perspective structure of the power storage device of the fourth embodiment.

以下、蓄電装置の実施形態について図面を参照しながら説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。
＜第１実施形態＞
はじめに、図１に示される第１実施形態の蓄電装置１０について説明する。図１に示されるように、本実施形態の蓄電装置１０は、蓄電素子２０，２１と、接合部材３０とを備えている。蓄電素子２０，２１は、Ｚ軸方向において積層して配置されている。本実施形態では、蓄電素子２０が第１蓄電素子に相当し、蓄電素子２１が第２蓄電素子に相当する。また、本実施形態では、Ｚ軸方向が所定方向に相当する。以下では、Ｚ軸方向のうちの一方向を「Ｚ１方向」と称し、他方向を「Ｚ２方向」と称する。 Hereinafter, an embodiment of a power storage device will be described with reference to the drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.
<First Embodiment>
First, the power storage device 10 according to the first embodiment shown in FIG. 1 will be described. As shown in FIG. 1, the power storage device 10 of the present embodiment includes power storage elements 20 and 21 and a joining member 30. The power storage elements 20 and 21 are stacked in the Z-axis direction. In the present embodiment, the storage element 20 corresponds to a first storage element, and the storage element 21 corresponds to a second storage element. In the present embodiment, the Z-axis direction corresponds to a predetermined direction. Hereinafter, one direction of the Z-axis direction is referred to as “Z1 direction”, and the other direction is referred to as “Z2 direction”.

蓄電素子２０は、電池本体２００と、電極端子２０１，２０２とを有している。
電池本体２００は、正極と負極とをセパレータを介して交互に重ねたものをラミネートにより封止した、いわゆるラミネート型の蓄電池である。電池本体２００としては、例えばラミネート型のリチウムイオン電池を用いることができる。電池本体２００は、Ｚ軸方向の厚さが薄くなるように扁平状に形成されている。Ｚ軸方向に直交する電池本体２００のそれぞれの断面形状は略矩形状をなしている。以下では、電池本体２００の長手方向を「Ｘ軸方向」と称し、電池本体２００の短手方向を「Ｙ軸方向」と称する。 The storage element 20 includes a battery body 200 and electrode terminals 201 and 202.
The battery main body 200 is a so-called laminate-type storage battery in which positive and negative electrodes alternately stacked via separators are sealed with a laminate. As the battery body 200, for example, a laminate type lithium ion battery can be used. The battery body 200 is formed in a flat shape so that the thickness in the Z-axis direction is reduced. Each cross-sectional shape of the battery body 200 orthogonal to the Z-axis direction is substantially rectangular. Hereinafter, the longitudinal direction of the battery body 200 is referred to as “X-axis direction”, and the short direction of the battery body 200 is referred to as “Y-axis direction”.

電極端子２０１，２０２は、Ｘ軸方向における電池本体２００の両側辺から突出するようにそれぞれ設けられている。電極端子２０１，２０２は、導電性を有する平板状の金属部材からなる。電極端子２０１は正極端子及び負極端子のいずれか一方であり、電極端子２０２は正極端子及び負極端子のいずれか他方である。   The electrode terminals 201 and 202 are provided so as to protrude from both sides of the battery body 200 in the X-axis direction. The electrode terminals 201 and 202 are made of a flat metal member having conductivity. The electrode terminal 201 is one of a positive terminal and a negative terminal, and the electrode terminal 202 is the other of the positive terminal and the negative terminal.

蓄電素子２１も、蓄電素子２０と同様に、電池本体２１０と、電極端子２１１，２１２とを有している。蓄電素子２１の電池本体２１０及び電極端子２１１，２１２のそれぞれの構造は、蓄電素子２０の電池本体２００及び電極端子２０１，２０２と同一であるため、それらの詳細な説明は割愛する。蓄電素子２１の電極端子２１１，２１２は、蓄電素子２０の電極端子２０１，２０２とＺ軸方向において対向している。より詳しくは、蓄電素子２１の電極端子２１１に対して蓄電素子２０の電極端子２０１がＺ１方向に位置している。また、蓄電素子２１の電極端子２１２に対して蓄電素子２０の電極端子２０２がＺ１方向に位置している。   Similarly to the power storage element 20, the power storage element 21 also has a battery body 210 and electrode terminals 211 and 212. Since the structure of the battery main body 210 and the electrode terminals 211 and 212 of the power storage element 21 is the same as that of the battery main body 200 and the electrode terminals 201 and 202 of the power storage element 20, their detailed description is omitted. The electrode terminals 211 and 212 of the electricity storage element 21 are opposed to the electrode terminals 201 and 202 of the electricity storage element 20 in the Z-axis direction. More specifically, the electrode terminal 201 of the storage element 20 is positioned in the Z1 direction with respect to the electrode terminal 211 of the storage element 21. Further, the electrode terminal 202 of the electricity storage element 20 is located in the Z1 direction with respect to the electrode terminal 212 of the electricity storage element 21.

蓄電素子２０の電極端子２０１の先端部は、蓄電素子２１の電極端子２１１の先端部に接合されている。具体的には、図２に示されるように、蓄電素子２０の電極端子２０１におけるＺ１方向の面２０１ａと、蓄電素子２１の電極端子２１１におけるＺ１方向の面２１１ａとが折り曲げられて接合されている。すなわち、Ｚ軸方向において蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１のそれぞれの対向していない面２０１ａ，２１１ａ同士が折り曲げられて接合されている。このような接合構造により蓄電素子２０及び蓄電素子２１が電気的に接続されている。   The tip end of the electrode terminal 201 of the power storage element 20 is joined to the tip end of the electrode terminal 211 of the power storage element 21. Specifically, as shown in FIG. 2, the surface 201 a in the Z1 direction of the electrode terminal 201 of the electricity storage element 20 and the surface 211 a in the Z1 direction of the electrode terminal 211 of the electricity storage element 21 are bent and joined. . That is, the non-opposing surfaces 201a and 211a of the electrode terminal 201 of the electricity storage element 20 and the electrode terminal 211 of the electricity storage element 21 in the Z-axis direction are bent and joined. With such a junction structure, the electricity storage element 20 and the electricity storage element 21 are electrically connected.

なお、蓄電素子２０の電極端子２０１と蓄電素子２１の電極端子２１１とが同一の電極である場合には、蓄電素子２０と蓄電素子２１とが電気的に並列に接続されることになる。また、蓄電素子２０の電極端子２０１と蓄電素子２１の電極端子２１１とが異なる電極である場合には、蓄電素子２０と蓄電素子２１とが電気的に直列に接続されることになる。   Note that when the electrode terminal 201 of the energy storage element 20 and the electrode terminal 211 of the energy storage element 21 are the same electrode, the energy storage element 20 and the energy storage element 21 are electrically connected in parallel. Further, when the electrode terminal 201 of the electricity storage element 20 and the electrode terminal 211 of the electricity storage element 21 are different electrodes, the electricity storage element 20 and the electricity storage element 21 are electrically connected in series.

図１に示されるように、接合部材３０は、導電性を有する平板状の金属部材からなる。図２に示されるように、接合部材３０は、蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１の接合部分４０の内面４１に設けられている。接合部分４０の内面４１とは、接合部分４０において蓄電素子２０の電池本体２００及び蓄電素子２１の電池本体２１０に対向している面を表す。図１に示されるように、接合部材３０は、蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１よりもＹ軸方向に突出するように形成される突出部３１を有している。突出部３１には、貫通孔３２が形成されている。貫通孔３２には、例えば蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１の電圧を検出するための電圧センサの端子等を接続することが可能である。   As shown in FIG. 1, the joining member 30 is made of a flat metal member having conductivity. As shown in FIG. 2, the bonding member 30 is provided on the inner surface 41 of the bonding portion 40 of the electrode terminal 201 of the power storage element 20 and the electrode terminal 211 of the power storage element 21. The inner surface 41 of the joint portion 40 represents a surface of the joint portion 40 that faces the battery body 200 of the electricity storage element 20 and the battery body 210 of the electricity storage element 21. As shown in FIG. 1, the bonding member 30 has a protruding portion 31 formed so as to protrude in the Y-axis direction from the electrode terminal 201 of the power storage element 20 and the electrode terminal 211 of the power storage element 21. A through hole 32 is formed in the protruding portion 31. For example, a voltage sensor terminal for detecting the voltage of the electrode terminal 201 of the electricity storage element 20 and the electrode terminal 211 of the electricity storage element 21 can be connected to the through hole 32.

次に、本実施形態の蓄電装置１０の製造方法について説明する。
本実施形態の蓄電装置１０の製造の際には、まず、蓄電素子２０，２１が図３に示されるように配置される。すなわち、蓄電素子２０及び蓄電素子２１がＸ軸方向に水平に並べて配置される。その際、図４に示されるように、蓄電素子２１の電極端子２１１の先端部におけるＺ１方向の面２１１ａに、蓄電素子２０の電極端子２０１の先端部におけるＺ２方向の面２０１ａが重ねられる。さらに、蓄電素子２０の電極端子２０１の先端部におけるＺ１方向の面２０１ｂに接合部材３０が載せられる。このようにして蓄電素子２０の電極端子２０１の先端部、蓄電素子２１の電極端子２１１の先端部、及び接合部材３０が重ねられて配置された後、それらが接合治具５０により挟み込まれて超音波接合等により接合される。その後、蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１のそれぞれの先端部を折り曲げることにより、蓄電素子２１に対して蓄電素子２０をＺ１軸方向に配置する。これにより、図１に示される蓄電装置１０の製造が完了する。 Next, a method for manufacturing the power storage device 10 of the present embodiment will be described.
In manufacturing the power storage device 10 of the present embodiment, first, the power storage elements 20 and 21 are arranged as shown in FIG. That is, the power storage element 20 and the power storage element 21 are arranged horizontally in the X-axis direction. At this time, as shown in FIG. 4, the surface 201 a in the Z2 direction at the front end portion of the electrode terminal 201 of the power storage element 20 is superimposed on the surface 211 a in the Z1 direction at the front end portion of the electrode terminal 211 of the power storage element 21. Further, the bonding member 30 is placed on the surface 201b in the Z1 direction at the tip of the electrode terminal 201 of the energy storage device 20. Thus, after the tip part of the electrode terminal 201 of the electricity storage element 20, the tip part of the electrode terminal 211 of the electricity storage element 21, and the joining member 30 are arranged so as to overlap each other, they are sandwiched by the joining jig 50 and super Bonded by sonic bonding or the like. Thereafter, the power storage element 20 is arranged in the Z1 axis direction with respect to the power storage element 21 by bending the respective tip portions of the electrode terminal 201 of the power storage element 20 and the electrode terminal 211 of the power storage element 21. Thereby, the manufacture of power storage device 10 shown in FIG. 1 is completed.

以上説明した本実施形態の蓄電装置１０によれば、以下の（１）及び（２）に示される作用及び効果を得ることができる。
（１）図５に示されるように、Ｚ軸方向に積層配置される蓄電素子２０及び蓄電素子２１のそれぞれの電極端子２０１，２１１を接合治具５０により挟み込んで接合させた場合、電池本体２００，２１０に接合されている電極端子２０１，２１１のそれぞれの基端部２０１ｃ，２１１ｃが折り曲げられ易くなる。そのため、電極端子２０１，２１１のそれぞれの基端部２０１ｃ，２１１ｃに応力が加わり易くなる。これが蓄電素子２０，２１の電池性能に悪影響を及ぼすおそれがある。この点、本実施形態の蓄電装置１０では、図３及び図４に示されるように、蓄電素子２０と蓄電素子２１とを水平方向に並べた状態で、それらの電極端子２０１，２１１同士を接合させることができる。これにより、図５に示されるような方法で蓄電素子２０及び蓄電素子２１のそれぞれの電極端子２０１，２１１を接合する場合と比較すると、電極端子２０１，２１１同士の接合時に加わる応力、特に電極端子２０１，２１１のそれぞれの基端部２０１ｃ，２１１ｃに加わる応力を減少させることができる。 According to the power storage device 10 of the present embodiment described above, the operations and effects shown in the following (1) and (2) can be obtained.
(1) As shown in FIG. 5, when the electrode terminals 201 and 211 of the electricity storage device 20 and the electricity storage device 21 stacked in the Z-axis direction are sandwiched and joined by the joining jig 50, the battery body 200. , 210, the base end portions 201 c, 211 c of the electrode terminals 201, 211 are easily bent. Therefore, stress is easily applied to the base end portions 201c and 211c of the electrode terminals 201 and 211, respectively. This may adversely affect the battery performance of the storage elements 20 and 21. In this regard, in the power storage device 10 of the present embodiment, as shown in FIGS. 3 and 4, the electrode terminals 201 and 211 are joined together in a state where the power storage elements 20 and 21 are arranged in the horizontal direction. Can be made. Thereby, compared with the case where the electrode terminals 201 and 211 of the electricity storage element 20 and the electricity storage element 21 are joined by the method shown in FIG. 5, the stress applied at the time of joining the electrode terminals 201 and 211, particularly the electrode terminals The stress applied to the base ends 201c and 211c of 201 and 211 can be reduced.

（２）蓄電装置１０は、蓄電素子２０の電極端子２０１と蓄電素子２１の電極端子２１１との接合部分４０に設けられる接合部材３０を更に備える。これにより、接合部材３０に電圧センサの端子等を接続することで、電圧の検出等が可能となる。
＜第２実施形態＞
次に、蓄電装置１０の第２実施形態について説明する。以下、第１実施形態の蓄電装置１０との相違点を中心に説明する。 (2) The power storage device 10 further includes a bonding member 30 provided at a bonding portion 40 between the electrode terminal 201 of the power storage element 20 and the electrode terminal 211 of the power storage element 21. Thereby, the voltage detection etc. are attained by connecting the terminal etc. of a voltage sensor to the joining member 30. FIG.
Second Embodiment
Next, a second embodiment of the power storage device 10 will be described. Hereinafter, the description will focus on the differences from the power storage device 10 of the first embodiment.

図６に示されるように、本実施形態の蓄電装置１０は、接合部材３０が設けられていない点で、第１実施形態の蓄電装置１０と異なる。本実施形態の蓄電装置１０では、電圧センサの端子等を接続するための貫通孔２０１ｄが蓄電素子２０の電極端子２０１に形成されている。本実施形態では、貫通孔２０１ｄが端子接続部に相当する。   As shown in FIG. 6, the power storage device 10 of the present embodiment is different from the power storage device 10 of the first embodiment in that the joining member 30 is not provided. In the power storage device 10 of the present embodiment, a through hole 201 d for connecting a voltage sensor terminal or the like is formed in the electrode terminal 201 of the power storage element 20. In the present embodiment, the through hole 201d corresponds to the terminal connection portion.

以上説明した本実施形態の蓄電装置１０によれば、上記の（１）の作用及び効果に加え、以下の（３）に示される作用及び効果を得ることができる。
（３）貫通孔２０１ｄに電圧センサの端子等を接続することにより、電圧の検出等が可能となる。 According to the power storage device 10 of the present embodiment described above, in addition to the function and effect of the above (1), the function and effect shown in the following (3) can be obtained.
(3) By connecting a voltage sensor terminal or the like to the through hole 201d, a voltage can be detected.

＜第３実施形態＞
次に、蓄電装置１０の第３実施形態について説明する。以下、第１実施形態の蓄電装置１０との相違点を中心に説明する。
図７に示されるように、本実施形態の蓄電装置１０は、蓄電素子２２を更に備えている。本実施形態では、隣り合う蓄電素子２０と蓄電素子２１との間では、蓄電素子２０が第１蓄電素子に相当し、蓄電素子２１が第２蓄電素子に相当する。また、隣り合う蓄電素子２１と蓄電素子２２との間では、蓄電素子２１が第１蓄電素子に相当し、蓄電素子２２が第２蓄電素子に相当する。 <Third Embodiment>
Next, a third embodiment of the power storage device 10 will be described. Hereinafter, the description will focus on the differences from the power storage device 10 of the first embodiment.
As shown in FIG. 7, the power storage device 10 of this embodiment further includes a power storage element 22. In the present embodiment, between the adjacent storage element 20 and storage element 21, the storage element 20 corresponds to a first storage element, and the storage element 21 corresponds to a second storage element. In addition, between the adjacent power storage elements 21 and 22, the power storage element 21 corresponds to a first power storage element, and the power storage element 22 corresponds to a second power storage element.

蓄電素子２２は、蓄電素子２０，２１と同様に、電池本体２２０と、電極端子２２１，２２２とを有している。蓄電素子２２の電池本体２２０及び電極端子２２１，２２２のそれぞれの構造は、蓄電素子２０，２１の電池本体２００，２１０及び電極端子２０１，２０２，２１１，２１２と同一であるため、それらの詳細な説明は割愛する。蓄電素子２２は、蓄電素子２１に対してＺ２方向に対向して配置されている。蓄電素子２２の電極端子２２１，２２２は、蓄電素子２１の電極端子２１１，２１２とＺ軸方向において対向している。より詳しくは、蓄電素子２２の電極端子２２１に対して蓄電素子２１の電極端子２１１がＺ１方向に位置している。また、蓄電素子２２の電極端子２２２に対して蓄電素子２１の電極端子２１２がＺ１方向に位置している。   The power storage element 22 includes a battery main body 220 and electrode terminals 221 and 222, similarly to the power storage elements 20 and 21. The structures of the battery body 220 and the electrode terminals 221 and 222 of the storage element 22 are the same as those of the battery bodies 200 and 210 and the electrode terminals 201, 202, 211, and 212 of the storage elements 20 and 21, respectively. I will omit the explanation. The power storage element 22 is disposed to face the power storage element 21 in the Z2 direction. The electrode terminals 221 and 222 of the storage element 22 are opposed to the electrode terminals 211 and 212 of the storage element 21 in the Z-axis direction. More specifically, the electrode terminal 211 of the storage element 21 is positioned in the Z1 direction with respect to the electrode terminal 221 of the storage element 22. Further, the electrode terminal 212 of the electricity storage element 21 is located in the Z1 direction with respect to the electrode terminal 222 of the electricity storage element 22.

蓄電装置１０は、蓄電素子２０の電極端子２０１と蓄電素子２１の電極端子２１１との間に配置される接合部材６０と、蓄電素子２１の電極端子２１２と蓄電素子２２の電極端子２２２との間に配置される接合部材６１とを備えている。
接合部材６０は、導電性の金属部材からなり、蓄電素子２０の電極端子２０１と蓄電素子２１の電極端子２１１とを接合している。接合部材６０は、コ字状に折り曲げられた形状を有しており、蓄電素子２０の電極端子２０１に接合される側壁部６００と、蓄電素子２１の電極端子２１１に接合される側壁部６０１と、側壁部６００及び側壁部６０１を連結させる連結部６０２とを備えている。連結部６０２は、蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１のそれぞれの側部の間に配置されている。接合部材６０は、側壁部６００と連結部６０２との境界部分、及び側壁部６０１と連結部６０２との境界部分において折り曲げることが可能となっている。 The power storage device 10 includes a bonding member 60 disposed between the electrode terminal 201 of the power storage element 20 and the electrode terminal 211 of the power storage element 21, and between the electrode terminal 212 of the power storage element 21 and the electrode terminal 222 of the power storage element 22. And a joining member 61 disposed on the surface.
The joining member 60 is made of a conductive metal member, and joins the electrode terminal 201 of the electricity storage element 20 and the electrode terminal 211 of the electricity storage element 21. The joining member 60 has a U-shaped bent shape, and includes a side wall portion 600 joined to the electrode terminal 201 of the power storage element 20 and a side wall portion 601 joined to the electrode terminal 211 of the power storage element 21. The side wall portion 600 and the connecting portion 602 for connecting the side wall portion 601 are provided. The connecting portion 602 is disposed between the side portions of the electrode terminal 201 of the power storage element 20 and the electrode terminal 211 of the power storage element 21. The joining member 60 can be bent at a boundary portion between the side wall portion 600 and the connecting portion 602 and a boundary portion between the side wall portion 601 and the connecting portion 602.

接合部材６０の連結部６０２には、貫通孔６０３が形成されている。貫通孔６０３には、蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１の電圧を検出するための電圧センサの端子等を接続することが可能である。
接合部材６１は、蓄電素子２１の電極端子２１２と蓄電素子２２の電極端子２２２とを接合している。接合部材６１は、接合部材６０と同一の構造を有しているため、その詳細な説明は割愛する。 A through hole 603 is formed in the connecting portion 602 of the joining member 60. A terminal of a voltage sensor for detecting the voltage of the electrode terminal 201 of the electricity storage element 20 and the electrode terminal 211 of the electricity storage element 21 can be connected to the through hole 603.
The joining member 61 joins the electrode terminal 212 of the electricity storage element 21 and the electrode terminal 222 of the electricity storage element 22. Since the joining member 61 has the same structure as the joining member 60, the detailed description thereof is omitted.

次に、本実施形態の蓄電装置１０の製造方法について説明する。
本実施形態の蓄電装置１０の製造の際には、まず、蓄電素子２０〜２２が図８に示されるように配置される。すなわち、蓄電素子２０〜２２がＹ軸方向に水平に並べて配置される。そして、蓄電素子２０の電極端子２０１と蓄電素子２１の電極端子２１１とに、折り曲げ前の平板状の接合部材６０が載せられる。また、蓄電素子２１の電極端子２１２と蓄電素子２２の電極端子２２２とに、折り曲げ前の平板状の接合部材６１が載せられる。続いて、蓄電素子２０の電極端子２０１と接合部材６０の側壁部６００とが接合されるとともに、蓄電素子２１の電極端子２１１と接合部材６０の側壁部６０１とが接合される。また、蓄電素子２１の電極端子２１２と接合部材６１の側壁部６１０とが接合されるとともに、蓄電素子２２の電極端子２２２と接合部材６１の側壁部６１１とが接合される。なお、これらの接合には、超音波接合等を用いることができる。 Next, a method for manufacturing the power storage device 10 of the present embodiment will be described.
In manufacturing the power storage device 10 of the present embodiment, first, the power storage elements 20 to 22 are arranged as shown in FIG. That is, the power storage elements 20 to 22 are arranged horizontally in the Y-axis direction. Then, a flat plate-like bonding member 60 before bending is placed on the electrode terminal 201 of the electricity storage element 20 and the electrode terminal 211 of the electricity storage element 21. In addition, a plate-shaped joining member 61 before being bent is placed on the electrode terminal 212 of the electricity storage element 21 and the electrode terminal 222 of the electricity storage element 22. Subsequently, the electrode terminal 201 of the power storage element 20 and the side wall portion 600 of the bonding member 60 are bonded, and the electrode terminal 211 of the power storage element 21 and the side wall portion 601 of the bonding member 60 are bonded. Further, the electrode terminal 212 of the electricity storage element 21 and the side wall portion 610 of the joining member 61 are joined, and the electrode terminal 222 of the electricity storage element 22 and the side wall portion 611 of the joining member 61 are joined. In addition, ultrasonic bonding etc. can be used for these joining.

その後、接合部材６０の連結部６０２と側壁部６００との境界部分、及び連結部６０２と側壁部６０１との境界部分を折り曲げることにより、接合部材６０をコ字状に成形する。同様に、接合部材６１の連結部６１２と側壁部６１０との境界部分、及び連結部６１２と側壁部６１１との境界部分を折り曲げることにより、接合部材６１をコ字状に成形する。これにより、図７に示されるように、蓄電素子２０〜２２がＺ軸方向に積層配置されることになり、蓄電装置１０の製造が完了する。   Thereafter, the joining member 60 is formed into a U shape by bending the boundary portion between the connecting portion 602 and the side wall portion 600 of the joining member 60 and the boundary portion between the connecting portion 602 and the side wall portion 601. Similarly, the joining member 61 is formed in a U shape by bending the boundary portion between the connecting portion 612 and the side wall portion 610 of the joining member 61 and the boundary portion between the connecting portion 612 and the side wall portion 611. Thereby, as shown in FIG. 7, the power storage elements 20 to 22 are stacked in the Z-axis direction, and the manufacture of the power storage device 10 is completed.

以上説明した本実施形態の蓄電装置１０によれば、以下の（４）〜（７）に示される作用及び効果を得ることができる。
（４）本実施形態の蓄電装置１０では、図８に示されるように、蓄電素子２０〜２２を水平方向に並べた状態で、蓄電素子２０の電極端子２０１と蓄電素子２１の電極端子２１１とを接合部材６０を介して接合させることができる。これにより、図５に示されるような方法で蓄電素子２０及び蓄電素子２１のそれぞれの電極端子２０１，２１１を接合する場合と比較すると、電極端子２０１，２１１同士の接合時にそれらに加わる応力、特に電極端子２０１，２１１のそれぞれの基端部２０１ｃ，２１１ｃに加わる応力を減少させることができる。また、接合部材６０に電圧センサの端子等を接続することにより、電圧の検出等が可能となる。 According to the power storage device 10 of the present embodiment described above, the operations and effects shown in the following (4) to (7) can be obtained.
(4) In the power storage device 10 of the present embodiment, as illustrated in FIG. 8, the electrode terminals 201 of the power storage elements 20 and the electrode terminals 211 of the power storage elements 21 are arranged in a state where the power storage elements 20 to 22 are arranged in the horizontal direction. Can be joined via the joining member 60. Thereby, compared with the case where each electrode terminal 201, 211 of the electrical storage element 20 and the electrical storage element 21 is joined by the method as shown in FIG. The stress applied to the base ends 201c and 211c of the electrode terminals 201 and 211 can be reduced. Further, by connecting a voltage sensor terminal or the like to the joining member 60, voltage detection or the like is possible.

（５）接合部材６０は、コ字状に折り曲げられた部材からなる。このように、接合部材６０そのものが折れ曲がることにより、電極端子２０１，２１１同士の接合時にそれらの基端部２０１ｃ，２１１ｃに加わる応力を更に減少させることができる。
（６）接合部材６０の連結部６０２は、蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１のそれぞれの先端部の側部の間に配置されている。これにより、図８に示されるように、蓄電素子２０，２１をＹ軸方向に、すなわち電極端子２０１，２１１の突出方向と直交する方向に並べた上で、それらの電極端子２０１，２１１を接合部材６０により接合することができる。 (5) The joining member 60 is made of a member bent into a U-shape. As described above, the joining member 60 itself is bent, so that the stress applied to the base end portions 201c and 211c at the time of joining the electrode terminals 201 and 211 can be further reduced.
(6) The connecting portion 602 of the joining member 60 is disposed between the side portions of the tip portions of the electrode terminal 201 of the electricity storage device 20 and the electrode terminal 211 of the electricity storage device 21. As a result, as shown in FIG. 8, the power storage elements 20 and 21 are arranged in the Y-axis direction, that is, in a direction orthogonal to the protruding direction of the electrode terminals 201 and 211, and then the electrode terminals 201 and 211 are joined. The members 60 can be joined.

（７）接合部材６０と同一形状を有する接合部材６１は、上記の（４）〜（６）に示される作用及び効果と同一又は類似の作用及び効果を奏することが可能である。
＜第４実施形態＞
次に、蓄電装置１０の第４実施形態について説明する。以下、第３実施形態の蓄電装置１０との相違点を中心に説明する。 (7) The joining member 61 having the same shape as the joining member 60 can exhibit the same or similar actions and effects as the actions and effects shown in the above (4) to (6).
<Fourth embodiment>
Next, a fourth embodiment of the power storage device 10 will be described. Hereinafter, the description will focus on differences from the power storage device 10 of the third embodiment.

図９に示されるように、本実施形態の蓄電装置１０では、接合部材６０の連結部６０２が、蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１のそれぞれの先端部の間に配置されている。
以上説明した本実施形態の蓄電装置１０では、上記の（４）及び（５）に示される作用及び効果に加え、以下の（８）に示される作用及び効果を得ることができる。 As shown in FIG. 9, in the power storage device 10 of the present embodiment, the connecting portion 602 of the joining member 60 is disposed between the respective tip portions of the electrode terminal 201 of the power storage element 20 and the electrode terminal 211 of the power storage element 21. Has been.
In the power storage device 10 of the present embodiment described above, in addition to the operations and effects shown in the above (4) and (5), the operation and effects shown in the following (8) can be obtained.

（８）本実施形態の蓄電装置１０では、蓄電素子２０，２１をＸ軸方向に、すなわち電極端子２０１，２１１の突出方向に並べた上で、それらの電極端子２０１，２１１を接合部材６０により接合させることができる。
＜他の実施形態＞
なお、各実施形態は、以下の形態にて実施することもできる。 (8) In the power storage device 10 of the present embodiment, the power storage elements 20 and 21 are arranged in the X-axis direction, that is, in the protruding direction of the electrode terminals 201 and 211, and the electrode terminals 201 and 211 are connected by the joining member 60. Can be joined.
<Other embodiments>
In addition, each embodiment can also be implemented with the following forms.

・第２実施形態の蓄電素子２０の電極端子２０１には、貫通孔２０１ｄに代えて、電圧センサ等の端子を接続可能な適宜の端子接続部、例えば袋ナットが設けられていてもよい。第１実施形態の接続部材３０に設けられる貫通孔３２、及び第３実施形態の接合部材６０に設けられる貫通孔６０３に関しても同様である。   -The electrode terminal 201 of the electrical storage device 20 of the second embodiment may be provided with an appropriate terminal connection portion capable of connecting a terminal such as a voltage sensor, for example, a cap nut, instead of the through hole 201d. The same applies to the through hole 32 provided in the connection member 30 of the first embodiment and the through hole 603 provided in the joining member 60 of the third embodiment.

・第２実施形態の蓄電装置１０では、蓄電素子２１の電極端子２１１に貫通孔が形成されていてもよい。あるいは、蓄電素子２０の電極端子２０１及び蓄電素子２１の電極端子２１１の両方に貫通孔が形成されていてもよい。
・各実施形態の蓄電装置１０では、それらの構造を流用することにより、接続される蓄電素子の数を適宜変更することが可能である。要は、各実施形態の蓄電装置１０は、所定方向に積層して配置される複数の蓄電素子の電極端子が接続された構造からなるものであればよい。 -In the electrical storage apparatus 10 of 2nd Embodiment, the through-hole may be formed in the electrode terminal 211 of the electrical storage element 21. FIG. Alternatively, a through hole may be formed in both the electrode terminal 201 of the electricity storage element 20 and the electrode terminal 211 of the electricity storage element 21.
-In the electrical storage apparatus 10 of each embodiment, it is possible to change suitably the number of the electrical storage elements connected by diverting those structures. In short, the power storage device 10 of each embodiment may have a structure in which electrode terminals of a plurality of power storage elements arranged in a predetermined direction are connected.

・本開示は上記の具体例に限定されるものではない。上記の具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素、及びその配置、条件、形状等は、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。   -This indication is not limited to said specific example. Any of the above specific examples that are appropriately modified by those skilled in the art are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the specific examples described above, and the arrangement, conditions, shape, and the like thereof are not limited to those illustrated, but can be changed as appropriate. Each element included in each of the specific examples described above can be appropriately combined as long as no technical contradiction occurs.

１０：蓄電装置
２０〜２２：蓄電素子
３０：接合部材
６０，６１：接合部材
２０１，２０２，２１１，２１２，２２１，２２２：電極端子
２０１ｄ：貫通孔（端子接続部）
６００，６０１，６１０，６１１：側壁部
６０２，６１２：連結部 10: Power storage device 20-22: Power storage element 30: Joining member 60, 61: Joining member 201, 202, 211, 212, 221, 222: Electrode terminal 201d: Through hole (terminal connection part)
600, 601, 610, 611: side wall part 602, 612: connecting part

Claims (7)

所定方向に積層して配置される複数の蓄電素子の電極端子が接続された構造からなる蓄電装置であって、
前記所定方向に隣り合う２つの蓄電素子を第１蓄電素子及び第２蓄電素子とするとき、
前記第１蓄電素子の電池本体から突出するように設けられる電極端子と、前記第２蓄電素子の電池本体から突出するように設けられる電極端子とが前記所定方向において対向して配置され、
前記所定方向において前記第１蓄電素子の電極端子及び前記第２蓄電素子の電極端子のそれぞれの対向していない面同士が折り曲げられて接合されている
蓄電装置。 A power storage device having a structure in which electrode terminals of a plurality of power storage elements arranged in a predetermined direction are connected,
When two power storage elements adjacent in the predetermined direction are a first power storage element and a second power storage element,
An electrode terminal provided to protrude from the battery body of the first electricity storage element and an electrode terminal provided to protrude from the battery body of the second electricity storage element are arranged to face each other in the predetermined direction,
Non-opposing surfaces of the electrode terminal of the first power storage element and the electrode terminal of the second power storage element in the predetermined direction are bent and joined. 前記第１蓄電素子の電極端子と前記第２蓄電素子の電極端子との接合部分に設けられる接合部材を更に備える
請求項１に記載の蓄電装置。 The power storage device according to claim 1, further comprising a bonding member provided at a bonding portion between the electrode terminal of the first power storage element and the electrode terminal of the second power storage element. 前記第１蓄電素子の電極端子及び前記第２蓄電素子の電極端子の少なくとも一方に端子接続部が形成されている
請求項１に記載の蓄電装置。 The power storage device according to claim 1, wherein a terminal connection portion is formed on at least one of the electrode terminal of the first power storage element and the electrode terminal of the second power storage element. 所定方向に積層して配置される複数の蓄電素子の電極端子が接続された構造からなる蓄電装置であって、
前記所定方向に隣り合う２つの蓄電素子を第１蓄電素子及び第２蓄電素子とするとき、
前記第１蓄電素子の電池本体から突出するように設けられる電極端子と、前記第２蓄電素子の電池本体から突出するように設けられる電極端子とが前記所定方向において対向して配置され、
前記第１蓄電素子の電極端子と前記第２蓄電素子の電極端子との間に配置され、前記第１蓄電素子の電極端子と前記第２蓄電素子の電極端子にそれぞれ接合される接合部材を備える
蓄電装置。 A power storage device having a structure in which electrode terminals of a plurality of power storage elements arranged in a predetermined direction are connected,
When two power storage elements adjacent in the predetermined direction are a first power storage element and a second power storage element,
An electrode terminal provided to protrude from the battery body of the first electricity storage element and an electrode terminal provided to protrude from the battery body of the second electricity storage element are arranged to face each other in the predetermined direction,
A joining member is provided between the electrode terminal of the first power storage element and the electrode terminal of the second power storage element, and is joined to the electrode terminal of the first power storage element and the electrode terminal of the second power storage element. Power storage device. 前記接合部材は、コ字状に折り曲げられた部材からなり、
前記接合部材の一方の側壁部は、前記第１蓄電素子の電極端子に接合され、
前記接合部材の他方の側壁部は、前記第２蓄電素子の電極端子に接合されている
請求項４に記載の蓄電装置。 The joining member is composed of a member bent into a U-shape,
One side wall portion of the bonding member is bonded to the electrode terminal of the first power storage element,
The power storage device according to claim 4, wherein the other side wall portion of the bonding member is bonded to an electrode terminal of the second power storage element. 前記接合部材において前記一方の側壁部及び前記他方の側壁部を連結する連結部は、前記第１蓄電素子の電極端子及び前記第２蓄電素子の電極端子のそれぞれの先端部の間に配置されている
請求項５に記載の蓄電装置。 In the joining member, a connecting portion that connects the one side wall portion and the other side wall portion is disposed between respective tip portions of the electrode terminals of the first power storage element and the second power storage element. The power storage device according to claim 5. 前記接合部材において前記一方の側壁部及び前記他方の側壁部を連結する連結部は、前記第１蓄電素子の電極端子及び前記第２蓄電素子の電極端子のそれぞれの側部の間に配置されている
請求項５に記載の蓄電装置。 A connecting portion that connects the one side wall portion and the other side wall portion in the joining member is disposed between the respective side portions of the electrode terminal of the first power storage element and the electrode terminal of the second power storage element. The power storage device according to claim 5.
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