JP5673385B2 - Assembled battery - Google Patents

Assembled battery Download PDF

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JP5673385B2
JP5673385B2 JP2011138960A JP2011138960A JP5673385B2 JP 5673385 B2 JP5673385 B2 JP 5673385B2 JP 2011138960 A JP2011138960 A JP 2011138960A JP 2011138960 A JP2011138960 A JP 2011138960A JP 5673385 B2 JP5673385 B2 JP 5673385B2
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battery
battery case
assembled battery
hole
connecting rod
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JP2013008479A (en
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修弘 中島
修弘 中島
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GS Yuasa International Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Description

本発明は、組電池の製造に適した単電池の電槽ケースに関する。   The present invention relates to a battery case for a unit cell suitable for manufacturing a battery pack.

複数の単電池を連結してモジュール(組電池)とする技術として、複数の単電池と、積層された各単電池の間に配される電池隔壁と、それらを挟持するための一対のエンドプレートと、エンドプレートに突出形成された締結部材と、その締結部材に挿通されて一対のエンドプレートを締結する締結ロッドとを含む二次電池モジュールが知られている(特許文献1)。   As a technology for connecting a plurality of unit cells to form a module (assembled battery), a plurality of unit cells, a battery partition wall disposed between the stacked unit cells, and a pair of end plates for sandwiching them There is known a secondary battery module including a fastening member protruding from an end plate and a fastening rod inserted through the fastening member to fasten a pair of end plates (Patent Document 1).

特開2006−156392号公報JP 2006-156392 A

一対のエンドプレートと締結(連結)ロッドのみで組電池を狭持する従来の構造に対して、本件発明者は、各単電池の側面に連結ロッドの貫通孔を設けた連結部材を設けた新規な構造を検討している。   In contrast to the conventional structure in which an assembled battery is held only by a pair of end plates and a fastening (connecting) rod, the present inventor has provided a connecting member provided with a connecting rod through-hole on the side surface of each unit cell. Is studying a new structure.

しかし、貫通孔とエンドプレートはいずれも同心円でしかも貫通孔の内径は連結ロッドの内径よりも連結ロッドを挿通する際のクリアランスの分だけ大きいため、振動や衝撃によりガタツキ(backlash)が発生しやすい。さらに、長期間に亘る振動環境下ではガタツキが増大し、貫通孔が摩耗すると共に連結ロッドにも負荷がかかりやすい。   However, the through hole and the end plate are both concentric, and the inner diameter of the through hole is larger than the inner diameter of the connecting rod by the clearance when the connecting rod is inserted, so backlash is likely to occur due to vibration and impact. . Furthermore, rattling increases under a long-term vibration environment, the through-holes wear and the load is easily applied to the connecting rod.

本発明は、上記に鑑みてなされたものであり、組電池を長期間に亘る振動環境下においた場合でも振動や衝撃によるガタツキの発生を抑えることを技術的課題とする。   The present invention has been made in view of the above, and an object of the present invention is to suppress the occurrence of rattling due to vibration and impact even when the assembled battery is placed in a vibration environment for a long period of time.

本発明に係る電槽ケースは、前記電槽ケースは幅の狭い一対の短側面と幅の広い一対の長側面とを有する直方体状であり、前記一対の短側面の各上下両端部に連結部材を備え、
前記連結部材は、前記短側面の幅方向に貫通する貫通孔を備え、前記貫通孔は、前記幅方向に対してテーパー形状であることを特徴とする。
In the battery case according to the present invention, the battery case has a rectangular parallelepiped shape having a pair of narrow short side surfaces and a pair of wide long side surfaces, and connecting members at both upper and lower ends of the pair of short side surfaces. With
The connecting member includes a through hole penetrating in the width direction of the short side surface, and the through hole has a tapered shape with respect to the width direction.

また、上記の該電槽ケースに収容された発電要素と、前記電槽ケースの上方に前記発電要素の出力端子とを備えることで単電池を構成することができ、さらに、この単電池を複数配置して連結することで組電池を構成することができる。   In addition, a unit cell can be configured by including the power generation element housed in the battery case and the output terminal of the power generation element above the battery case, and a plurality of the unit cells can be formed. An assembled battery can be comprised by arrange | positioning and connecting.

本発明を用いて構成した組電池は、長期間に亘る振動環境下においた場合でも振動や衝撃によるガタツキの発生と増大が抑えられる。   The assembled battery configured by using the present invention can suppress the occurrence and increase of rattling due to vibration and impact even in a vibration environment for a long period of time.

第1の実施形態の組電池、(a)は連結部材の断面図であり、(b)は連結ロッドの挿入を説明する図The assembled battery of 1st Embodiment, (a) is sectional drawing of a connection member, (b) is a figure explaining insertion of a connection rod. 第1の実施形態の組電池の単電池、(a)は単電池の斜視図であり、(b)は単電池の正面図1A is a perspective view of a unit cell, and FIG. 1B is a front view of the unit cell. 第1の実施形態の組電池の斜視図The perspective view of the assembled battery of 1st Embodiment 第2の実施形態の組電池のフェルールの挿入を説明する図The figure explaining insertion of the ferrule of the assembled battery of 2nd Embodiment 第3の実施形態の組電池、(a)は緩衝部材の取り付けを説明する図であり、(b)は緩衝部材の取り付け後の組電池を示す図The assembled battery of 3rd Embodiment, (a) is a figure explaining attachment of a buffer member, (b) is a figure which shows the assembled battery after attachment of a buffer member 第4の実施形態の組電池、(a)は緩衝部材の取り付けを説明する図であり、(b)は緩衝部材の取り付け後の組電池を示す図The assembled battery of 4th Embodiment, (a) is a figure explaining attachment of a buffer member, (b) is a figure which shows the assembled battery after attachment of a buffer member 各実施形態で説明する単電池を収容する電槽ケースA battery case that houses a single cell described in each embodiment

以下、本発明の実施形態について図面を参照して詳細に説明する。なお、同一又は同種の機能を発揮する構成部分については同じ符号を用いて説明を省略する場合がある。また、各実施形態はいずれも例示であり、本発明について限定的な解釈を与えるものではない。まず、第1の実施形態の組電池の全体について説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, about the component which exhibits the same or the same kind of function, description may be abbreviate | omitted using the same code | symbol. Each embodiment is only an example and does not give a limited interpretation on the present invention. First, the whole assembled battery of 1st Embodiment is demonstrated.

(第1の実施形態)
図3は、第1の実施形態の組電池の斜視図である。組電池20は、複数の単電池10と、一対のエンドプレート11と、連結ロッド12と、ナット13と、両端部に凸部が設けられたスペーサー14とを有する。
(First embodiment)
FIG. 3 is a perspective view of the assembled battery according to the first embodiment. The assembled battery 20 includes a plurality of unit cells 10, a pair of end plates 11, a connecting rod 12, a nut 13, and a spacer 14 having convex portions at both ends.

図2は、図3の組電池の単電池を示す図である。図2(a)は、単電池の斜視図であり、図2(b)は、単電池の正面図である。図2(a)に示すように、単電池10は、発電要素が電槽ケース1に収容され、単電池10の上面両端部に正極端子2及び負極端子3が設けられ、中央部に安全弁6が設けられる。   FIG. 2 is a diagram showing a unit cell of the assembled battery of FIG. FIG. 2A is a perspective view of the unit cell, and FIG. 2B is a front view of the unit cell. As shown in FIG. 2A, the cell 10 includes a power generation element housed in the battery case 1, the positive electrode terminal 2 and the negative electrode terminal 3 are provided at both ends of the upper surface of the cell 10, and a safety valve 6 is provided at the center. Is provided.

図7(a)は、電槽ケース1の斜視図であり、図7(b)は、電槽ケース1の正面図である。この図に示すように、電槽ケース1は、幅の狭い一対の短側面と幅の広い一対の長側面とを有する直方体状であり、電槽ケース1の内部に正極、負極、電解質等を備えた発電要素を収容することができる。そして、この一対の短側面のそれぞれに樹脂などで構成される連結部材4、5が設けられる。なお、この電槽ケースは以下の各実施形態で説明する単電池に用いられるものである。   FIG. 7A is a perspective view of the battery case 1, and FIG. 7B is a front view of the battery case 1. As shown in this figure, the battery case 1 has a rectangular parallelepiped shape having a pair of narrow short side surfaces and a pair of wide long side surfaces. A positive electrode, a negative electrode, an electrolyte, and the like are placed inside the battery case 1. The power generation element provided can be accommodated. And the connection members 4 and 5 comprised by resin etc. are provided in each of this pair of short side surfaces. In addition, this battery case is used for the single cell demonstrated by each following embodiment.

図1(a)は、単電池を並置した状態を示す断面図であり、連結部材の内部構造を示している。図1(b)は、連結ロッドの挿入方向を説明する図であり、破線の矢印は、連結ロッドの挿入する方向を示している。   Fig.1 (a) is sectional drawing which shows the state which arranged the cell in parallel, and has shown the internal structure of the connection member. FIG.1 (b) is a figure explaining the insertion direction of a connection rod, and the arrow of a broken line has shown the direction where a connection rod is inserted.

図1(a)に示すように、連結部材4は、短側面の幅方向に貫通する貫通孔41、42と窓枠部44を備え、複数の単電池を並置した状態でこの貫通孔に連結ロッド12を挿通して両端部をナット等の締結具で狭持することで組電池を構成することができる。また、図1(a)には表れないが、電槽ケースの短側面の反対側にも連結部材5が設けられている。連結部材5は連結部材4と同径同大の部材からなる。   As shown in FIG. 1A, the connecting member 4 includes through holes 41 and 42 and a window frame portion 44 penetrating in the width direction of the short side surface, and is connected to the through holes in a state where a plurality of single cells are juxtaposed. The assembled battery can be configured by inserting the rod 12 and holding both ends with a fastener such as a nut. Although not shown in FIG. 1A, a connecting member 5 is also provided on the opposite side of the short side surface of the battery case. The connecting member 5 is made of a member having the same diameter and the same size as the connecting member 4.

図2に示すように、本実施形態で例示する電槽ケース1は、一つの短側面に取り付けられる上下の連結部材が一体物で構成されており、その中央部に通じる窓枠部44、54をそれぞれ有する。窓枠部44、54は、単電池10の短側面からの放熱を促進させる役割を担う。さらに、連結部材4,5には隣り合う単電池の間に間隙を形成するためのスペーサー14が設けられている。窓枠部の両脇にはスペーサー14を取り付けるための凹部43、53が設けられる。連結部材を上下一体に構成すると、射出成形により形成するにあたって射出口を減らせることで製造工程を簡素化できる利点があり、凹部43、53を設けることができる利点もある。ただし、上下の連結部材は別体で構成されていてもよい。別体で構成すると電槽ケースの露出部分が大きくなるため、窓枠部を設ける場合よりもさらに放熱を促進させる効果を有する。   As shown in FIG. 2, the battery case 1 exemplified in the present embodiment is composed of upper and lower connecting members attached to one short side surface as a single body, and window frame portions 44, 54 leading to the center portion thereof. Respectively. The window frame portions 44 and 54 play a role of promoting heat dissipation from the short side surface of the unit cell 10. Further, the connecting members 4 and 5 are provided with a spacer 14 for forming a gap between adjacent unit cells. Concave portions 43 and 53 for attaching the spacer 14 are provided on both sides of the window frame portion. When the connecting member is configured integrally with the upper and lower sides, there is an advantage that the manufacturing process can be simplified by reducing the number of injection ports when forming by injection molding, and there is also an advantage that the recesses 43 and 53 can be provided. However, the upper and lower connecting members may be configured separately. If it is configured as a separate body, the exposed portion of the battery case becomes larger, so that it has the effect of promoting heat dissipation more than when a window frame is provided.

本実施形態において、貫通孔41,42は口径R1から口径R2まで(R1>R2)のテーパー形状(先細り形状)に加工され、上下で互いにテーパーの方向が逆に構成されている。連結ロッド12は口径の大きい方の貫通孔から挿入する。口径の大きい方の貫通孔は連結ロッドを挿通するためのクリアランスを確保することに役立つ。口径の小さい方の貫通孔は連結ロッドの太さとほぼ同程度まで小さくしておくことで、各連結部材の結束力を向上させることができる。さらに、テーパーの方向を上下左右で互いに逆向きにすることで、結束の方向を分散させることができる。   In the present embodiment, the through holes 41 and 42 are processed into a tapered shape (tapered shape) from the diameter R1 to the diameter R2 (R1> R2), and the directions of the taper are reversed in the vertical direction. The connecting rod 12 is inserted from the through hole having the larger diameter. The through hole having the larger diameter serves to secure a clearance for inserting the connecting rod. The binding force of each connecting member can be improved by making the through-hole having the smaller diameter small to substantially the same thickness as the connecting rod. Furthermore, the direction of a taper can be disperse | distributed by making the direction of a taper mutually reverse in up and down, right and left.

図2(b)に示すように、連結部材4又は連結部材5と短側面の曲面部分とにより間隙7が形成されている。間隙7を形成することによって、連結部材4、5が電槽ケース1に対し剥離方向の押圧力を受けた場合でも、ケースのエッジ部にRが設けられている場合には、連結部材4、5と電槽ケース1との接着面がその負荷を直接受けにくくなる。また、後述するように連結部材4、5間に弾性体からなる緩衝部材を設ける場合は、設置のための間隙としても利用できる。   As shown in FIG. 2B, a gap 7 is formed by the connecting member 4 or the connecting member 5 and the curved surface portion of the short side surface. Even when the connecting members 4 and 5 are subjected to a pressing force in the peeling direction with respect to the battery case 1 by forming the gap 7, the connection member 4, 5 and the battery case 1 are less likely to be directly subjected to the load. Moreover, when providing the buffer member which consists of an elastic body between the connection members 4 and 5 so that it may mention later, it can utilize also as a gap | interval for installation.

図2(a)に示すように、連結部材4、5の幅は、スペーサー14の幅を考慮して電槽ケースの短側面の幅よりも大きく構成されているが、第3及び第4の実施形態で例示するように、電槽ケースの短側面の幅と同じにしておいて隣接する連結部材間にスペーサーとしても機能する緩衝部材を設けても良い。   As shown in FIG. 2A, the widths of the connecting members 4 and 5 are configured to be larger than the width of the short side surface of the battery case in consideration of the width of the spacer 14. As illustrated in the embodiment, a buffer member that also functions as a spacer may be provided between adjacent connecting members with the same width as the short side surface of the battery case.

電槽ケース1の材質は、例えば、アルミニウム等の金属や合成樹脂からなる。連結部材4、5の材質は、例えば樹脂などの連結ロッドよりも機械的に柔らかい部材からなり、例えば射出成形によって製造される。こうすることで、連結ロッドの出口側の貫通孔すなわち口径の小さい方の貫通孔の口径R2が連結ロッドの太さよりも若干細い場合でも、連結ロッドを挿入する際に、貫通孔の口径が押し広げられ、組立作業が容易でしかも結束力を向上させることができる。   The material of the battery case 1 is made of a metal such as aluminum or a synthetic resin, for example. The material of the connecting members 4 and 5 is a member that is mechanically softer than a connecting rod such as a resin, and is manufactured by injection molding, for example. In this way, even when the diameter R2 of the through hole on the outlet side of the connecting rod, that is, the smaller diameter through hole is slightly smaller than the thickness of the connecting rod, the diameter of the through hole is pushed when the connecting rod is inserted. It is widened, the assembling work is easy, and the binding force can be improved.

連結部材4、5は、電槽ケース1に接着剤で接着して取り付けてもよく、射出成形によって金属製の電槽ケース1と一体化して形成してもよい。例えば、次の方法を用いてアルミニウム製の電槽ケースに樹脂の連結部材を接合してもよい。まず、トリアジンチオール誘導体を含有する電解質水溶液中で、電槽ケース(アルミニウム)を陽極とし、白金板、チタン板、又はカーボン板を陰極として、陽極と陰極との間に電圧を印加し、電槽ケースの表面に陽極酸化皮膜を形成する(電着工程)。その後電槽ケースを温度40℃〜60℃の水で5秒〜120秒間洗浄する(洗浄工程)。これにより、樹脂材料との接合性に優れたアルミニウム部材が電槽ケースに形成される。そして、射出成形で連結部材をそのアルミニウム部材に直接成形することでアルミニウム製の電槽ケースに樹脂の連結部材を接合することができる。   The connecting members 4 and 5 may be attached to the battery case 1 with an adhesive, or may be formed integrally with the metal battery case 1 by injection molding. For example, a resin connecting member may be joined to an aluminum battery case using the following method. First, in an aqueous electrolyte solution containing a triazine thiol derivative, a battery case (aluminum) is used as an anode, a platinum plate, a titanium plate, or a carbon plate is used as a cathode, and a voltage is applied between the anode and the cathode. An anodized film is formed on the surface of the case (electrodeposition process). Thereafter, the battery case is washed with water at a temperature of 40 ° C. to 60 ° C. for 5 seconds to 120 seconds (cleaning step). Thereby, the aluminum member excellent in bondability with the resin material is formed in the battery case. And a resin connection member can be joined to a battery case made of aluminum by directly forming a connection member into the aluminum member by injection molding.

組電池20の組み立て方法は次の通りである。まず、連結部材4と連結部材5とが交互に隣接するように単電池10を並列させる。この際に、連結部材4、5の凹部にスペーサー14の凸部をそれぞれ嵌合させて各単電池10の間にスペーサー14を配置する。次にそれらを一対のエンドプレート11で挟持し、連結部材4、5及びエンドプレート11の貫通孔41、42及び51、52に連結ロッド12をそれぞれ口径の大きい方から挿入する。次に連結ロッド12の両端部をナット13により締め付けて各単電池10を連結する。これにより、組電池20を得ることができる。   The assembled method of the assembled battery 20 is as follows. First, the cells 10 are arranged in parallel so that the connecting members 4 and the connecting members 5 are alternately adjacent to each other. At this time, the protrusions of the spacers 14 are fitted into the recesses of the connecting members 4 and 5, respectively, and the spacers 14 are arranged between the unit cells 10. Next, they are clamped by a pair of end plates 11, and the connecting rods 12 are inserted into the connecting members 4, 5 and the through holes 41, 42, 51, 52 of the end plate 11 from the larger diameter. Next, both ends of the connecting rod 12 are tightened with nuts 13 to connect the unit cells 10. Thereby, the assembled battery 20 can be obtained.

なお、エンドプレート11は機械的強度を高めることに役立つが強度が要求スペックを満たすのであれば、例えばナットで締め付けるだけのような、より簡易な固定具に変更してもよい。こうすることで組電池を軽量化することができる。   The end plate 11 is useful for increasing the mechanical strength. However, if the strength satisfies the required specifications, the end plate 11 may be changed to a simpler fixing tool such as just tightening with a nut. By doing so, the assembled battery can be reduced in weight.

本実施形態で説明する電槽ケースを用いて構成した単電池により組電池を構成すると、組電池が長期間に亘る振動環境下におかれた場合でも、ガタツキが発生しにくくなり、連結部材間の緩みを抑えて組み立て状態を維持することができる。   When an assembled battery is configured by a single battery configured using the battery case described in the present embodiment, even when the assembled battery is placed in a vibration environment for a long period of time, it is difficult for rattling to occur and between the connecting members. It is possible to maintain the assembled state while suppressing the looseness.

(第2の実施形態)
第1の実施形態の組電池は、連結部材の貫通孔と連結ロッドとの間に間隙を有するが、その間隙を埋めることで耐振動性を一層向上させることができる。
(Second Embodiment)
The assembled battery according to the first embodiment has a gap between the through hole of the connecting member and the connecting rod. By filling the gap, the vibration resistance can be further improved.

図4は、第2の実施形態の組電池に「フェルール」と呼ばれるリング状の部材を挿入する様子を説明した図である。矢印は、フェルールの挿入方向を示す。フェルールとは、管の継ぎ手の流体密封等に用いられる金属製のリング状部材であり、連結ロッドを締め付けることで変形してくさびのような働きによって締結力を高める。本実施形態においては、図4に示すように、フェルール15は、連結ロッドを貫通孔41、42、51、52にそれぞれ挿入する前に、予め各貫通孔のいずれも口径の小さい側から挿入し、連結ロッドにナットを締め付けることで変形して締結力を高める。   FIG. 4 is a diagram illustrating a state in which a ring-shaped member called “ferrule” is inserted into the assembled battery according to the second embodiment. The arrow indicates the ferrule insertion direction. A ferrule is a metal ring-shaped member used for fluid sealing or the like of a pipe joint. The ferrule is deformed by tightening a connecting rod to increase a fastening force by acting like a rust. In the present embodiment, as shown in FIG. 4, before inserting the connecting rod into the through holes 41, 42, 51, 52, the ferrule 15 is inserted in advance from the side with the smaller diameter of each through hole. By tightening the nut on the connecting rod, it is deformed to increase the fastening force.

第2の実施形態によると、フェルール15によって連結ロッドと貫通孔との密着性を高め、連結ロッドと貫通孔との間隙により生じるガタツキを抑えて耐振動性を向上させることができる。貫通孔と連結ロッドとの間隙を埋めるその他の手段としては、「フェルール」に代えて、例えばシールテープなどの「シール材」を用いてもよい。   According to the second embodiment, the ferrule 15 can enhance the adhesion between the connecting rod and the through hole, and can suppress vibrations caused by the gap between the connecting rod and the through hole, thereby improving the vibration resistance. As other means for filling the gap between the through hole and the connecting rod, for example, a “seal material” such as a seal tape may be used instead of the “ferrule”.

(第3の実施形態)
上記第1及び第2の実施形態で例示した組電池は、各連結部材の幅を電槽ケースの短側面と幅を等しくすると共に、隣接する連結部材同士間に緩衝部材を設けてもよい。図5は、第3の実施形態の組電池の一例を示す図である。図5(a)は、緩衝部材を取り付ける様子を説明する図であり、図5(b)は、緩衝部材の取り付け後の組電池を示す図である。なお、図5は、その他の単電池、エンドプレート、連結ロッド等を省略している。矢印は、緩衝部材の嵌合凸部の挿入される方向を示す。図5(a)及び図5(b)に示すように、緩衝部材16は、ゴム等の弾性部材からなり、嵌合凸部17を有する。緩衝部材16は、連結部材4、5の上下両端部でそれぞれ挟まれるように配置される。この際に、嵌合凸部17は電槽ケース1の短側面と連結部材4又は連結部材5により形成された間隙7にそれぞれ嵌合され、緩衝部材16自身の回転を防止する。
(Third embodiment)
In the assembled battery exemplified in the first and second embodiments, the width of each connecting member may be equal to the width of the short side surface of the battery case, and a buffer member may be provided between adjacent connecting members. FIG. 5 is a diagram illustrating an example of the assembled battery according to the third embodiment. Fig.5 (a) is a figure explaining a mode that a buffer member is attached, FIG.5 (b) is a figure which shows the assembled battery after the attachment of a buffer member. In FIG. 5, other cells, end plates, connecting rods and the like are omitted. An arrow shows the direction in which the fitting convex part of a buffer member is inserted. As shown in FIGS. 5A and 5B, the buffer member 16 is made of an elastic member such as rubber and has a fitting convex portion 17. The buffer member 16 is disposed so as to be sandwiched between the upper and lower ends of the connecting members 4 and 5. At this time, the fitting convex portion 17 is fitted into the gap 7 formed by the short side surface of the battery case 1 and the connecting member 4 or the connecting member 5 to prevent the buffer member 16 itself from rotating.

緩衝部材16は弾性部材で構成されるため、組電池が機械的衝撃を受けた際に各単電池への衝撃を緩和する。特に、連結部材同士が直接接する場合と比べて、組電池が外部からの衝撃による応力を受けた場合でもその応力が連結部材を通じて直接伝達することがなくなるため、連結部材の損傷や剥離が抑えられる。   Since the buffer member 16 is formed of an elastic member, when the assembled battery receives a mechanical shock, the shock applied to each unit cell is reduced. In particular, compared to the case where the connecting members are in direct contact with each other, even when the assembled battery receives stress due to external impact, the stress is not directly transmitted through the connecting member, so that the damage and peeling of the connecting member can be suppressed. .

第3の実施形態の組電池は、緩衝部材16で各単電池10間の振動や衝撃を緩衝させて各単電池10間の緩みを抑えることができる。また、緩衝部材16をスペーサーとすることで各単電池10間の距離を調整することができる。しかも、高価な各単電池の電槽ケースの構成部品(ASSY)の規格点数を減らすことができ、コスト的にも有利である。   In the assembled battery of the third embodiment, the buffer member 16 can buffer vibrations and shocks between the unit cells 10 to suppress loosening between the unit cells 10. Moreover, the distance between each single battery 10 can be adjusted by using the buffer member 16 as a spacer. Moreover, it is possible to reduce the standard score of the component parts (ASSY) of the battery case of each expensive unit cell, which is advantageous in terms of cost.

(第4の実施形態)
図6は、第4の実施形態の組電池の他の例を示す図である。図6(a)は、緩衝部材を取り付ける様子を説明する図であり、図6(b)は、緩衝部材の取り付け後の組電池を示す図である。なお、図6は、その他の単電池、エンドプレート、連結ロッド等を省略している。矢印は、緩衝部材の嵌合凸部の挿入される方向を示す。図6(a)及び図6(b)に示すように、単電池91は、一対の短側面のそれぞれに樹脂などで構成される連結部材92、93が設けられている。連結部材92、93以外の単電池91の構成は基本的に第1の実施形態の単電池10と同じである。連結部材92は、連結部材4と同様の構成に、さらに上下両端部に溝94を設けたものである。また、連結部材93は、連結部材5と同様の構成に、さらに上下両端部に溝94を設けたものである。緩衝部材95は、ゴム等の弾性部材からなり、嵌合凸部96を有する。緩衝部材95は、連結部材92、93の上下両端部でそれぞれ挟まれるように配置される。この際に、嵌合凸部96は連結部材92又は連結部材93の溝94にそれぞれ嵌合され、緩衝部材95自身の回転を防止する。緩衝部材95は、組電池が機械的衝撃を受けた際に各単電池への衝撃を緩和する。
(Fourth embodiment)
FIG. 6 is a diagram illustrating another example of the assembled battery according to the fourth embodiment. Fig.6 (a) is a figure explaining a mode that a buffer member is attached, FIG.6 (b) is a figure which shows the assembled battery after the attachment of a buffer member. In FIG. 6, other cells, end plates, connecting rods and the like are omitted. An arrow shows the direction in which the fitting convex part of a buffer member is inserted. As shown in FIGS. 6A and 6B, the unit cell 91 is provided with connecting members 92 and 93 made of resin or the like on each of a pair of short side surfaces. The configuration of the unit cell 91 other than the connecting members 92 and 93 is basically the same as that of the unit cell 10 of the first embodiment. The connecting member 92 has a configuration similar to that of the connecting member 4, and further has grooves 94 at both upper and lower ends. The connecting member 93 has the same configuration as that of the connecting member 5 and is further provided with grooves 94 at both upper and lower ends. The buffer member 95 is made of an elastic member such as rubber and has a fitting convex portion 96. The buffer member 95 is disposed so as to be sandwiched between the upper and lower ends of the connecting members 92 and 93. At this time, the fitting convex portions 96 are respectively fitted in the grooves 94 of the connecting member 92 or the connecting member 93 to prevent the buffer member 95 itself from rotating. The buffer member 95 reduces the impact on each unit cell when the assembled battery receives a mechanical impact.

第4の実施形態の組電池は、緩衝部材95で各単電池91間の振動や衝撃を緩衝させて各単電池91間の緩みを抑えることができる。また、緩衝部材95をスペーサーとすることで各単電池91間の距離を調整することができる。しかも、高価な各単電池の電槽ケースの構成部品(ASSY)の規格点数を減らすことができ、コスト的にも有利である。   In the assembled battery of the fourth embodiment, the buffer member 95 can buffer vibrations and shocks between the unit cells 91 to suppress loosening between the unit cells 91. Moreover, the distance between each cell 91 can be adjusted by using the buffer member 95 as a spacer. Moreover, it is possible to reduce the standard score of the component parts (ASSY) of the battery case of each expensive unit cell, which is advantageous in terms of cost.

1 電槽ケース
2、3 出力端子
4、5 連結部材
6 安全弁
7 間隙
10 単電池
11 エンドプレート
12 連結ロッド
13 ナット
14 スペーサー
15 フェルール
16 緩衝部材
20 組電池
41、42、51、52 貫通孔
43、53 凹部
DESCRIPTION OF SYMBOLS 1 Battery case 2, 3 Output terminal 4, 5 Connecting member 6 Safety valve 7 Space | gap 10 Cell 11 End plate 12 Connecting rod 13 Nut 14 Spacer 15 Ferrule 16 Buffer member 20 Battery assembly 41, 42, 51, 52 Through-hole 43, 53 recess

Claims (2)

電槽ケースと、前記電槽ケースに収容された発電要素と、前記発電要素の出力端子とを備える単電池を複数並置した単電池群、前記単電池群を挟持するための固定具、及び連結ロッドを含む組電池であって、
前記出力端子は、前記電槽ケースの上方に備えられ、
前記電槽ケースは、幅の狭い一対の短側面と幅の広い一対の長側面とを有する直方体状であり、前記一対の短側面の各上下両端部に連結部材を備え、
前記連結部材は、前記短側面の幅方向に貫通する貫通孔を備え、
前記貫通孔は、前記幅方向に対してテーパー形状であり、
前記連結ロッドは、前記貫通孔に挿通されて前記単電池群及び前記固定具を連結し、
前記テーパー形状の貫通孔における小さい方の口径は、前記連結ロッドの太さと同じであるか、又は前記連結ロッドの太さよりも小さい、組電池。
A battery group in which a plurality of cells including a battery case, a power generation element housed in the battery case, and an output terminal of the power generation element are juxtaposed, a fixture for sandwiching the battery group, and a connection An assembled battery including a rod,
The output terminal is provided above the battery case,
The battery case has a rectangular parallelepiped shape having a pair of narrow short side surfaces and a pair of wide long side surfaces, and includes connecting members at both upper and lower ends of the pair of short side surfaces,
The connecting member includes a through-hole penetrating in the width direction of the short side surface,
The through hole is tapered with respect to the width direction,
The connecting rod is inserted through the through hole to connect the unit cell group and the fixture,
The assembled battery in which the smaller diameter of the tapered through hole is the same as the thickness of the connecting rod or smaller than the thickness of the connecting rod .
前記貫通孔のテーパー形状は、前記連結部材の上下両端部で逆向きである請求項1に記載の組電池。
The assembled battery according to claim 1, wherein the tapered shape of the through hole is opposite in the upper and lower end portions of the connecting member.
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