JP2009272234A - Spacer for battery pack and battery pack using the same - Google Patents
Spacer for battery pack and battery pack using the same Download PDFInfo
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- JP2009272234A JP2009272234A JP2008123568A JP2008123568A JP2009272234A JP 2009272234 A JP2009272234 A JP 2009272234A JP 2008123568 A JP2008123568 A JP 2008123568A JP 2008123568 A JP2008123568 A JP 2008123568A JP 2009272234 A JP2009272234 A JP 2009272234A
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- batteries
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- 125000006850 spacer group Chemical group 0.000 title claims abstract description 45
- 239000004020 conductor Substances 0.000 claims abstract description 5
- 239000012212 insulator Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 description 9
- 238000001816 cooling Methods 0.000 description 7
- 238000010248 power generation Methods 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
本発明は薄角形電池を用いた組電池用スペーサーおよびそれを用いた組電池に関するものである。 The present invention relates to an assembled battery spacer using a rectangular battery and an assembled battery using the same.
各種二次電池の単セル電圧は約１．２〜５Ｖの間にある。すなわちニッケル―カドミウム電池やニッケル―水素電池では約１．２Ｖ、鉛蓄電池では約２Ｖ、非水系二次電池では約３〜５Ｖである。 The single cell voltage of various secondary batteries is between about 1.2-5V. That is, it is about 1.2 V for nickel-cadmium batteries and nickel-hydrogen batteries, about 2 V for lead acid batteries, and about 3-5 V for non-aqueous secondary batteries.
ところが電池の用途によっては、例えば電気自動車の電源に用いる場合、２００Ｖ以上の電圧や４００Ａｈ以上の容量が要求される。しかし、単セルの電圧や容量には限度があるため、特許文献１や特許文献２に開示されているように、複数の二次電池を直列や並列に接続して組電池とし、用途に応じた電圧や容量が得られるようにして使用している。 However, depending on the use of the battery, for example, when used for a power source of an electric vehicle, a voltage of 200 V or more and a capacity of 400 Ah or more are required. However, since the voltage and capacity of a single cell are limited, as disclosed in Patent Document 1 and Patent Document 2, a plurality of secondary batteries are connected in series or in parallel to form an assembled battery, depending on the application. It is used in such a way that a high voltage and capacity can be obtained.
角薄形単電池を複数個積層して組電池にする場合、電池は充放電によって発熱するため、電池を冷却する目的で、特許文献３に開示されているように、電池と電池の間に冷却風を流すためのスペーサーを設けている。また、電池とスペーサーが直接接触している場合には、特許文献４に開示されているように、スペーサーに冷却風通路を設けることがある。 When a plurality of rectangular thin cells are stacked to form an assembled battery, the battery generates heat by charging / discharging. Therefore, for the purpose of cooling the battery, as disclosed in Patent Document 3, between the batteries, A spacer for flowing cooling air is provided. Further, when the battery and the spacer are in direct contact, as disclosed in Patent Document 4, a cooling air passage may be provided in the spacer.
多数の二次電池を接続した組電池においては、異なる電池の端子間を接続杆でつなぐことにより、電気的接続をおこなっている。例えば、特許文献５で開示されているように、従来の接続構造では、接続杆は平板状であり、その平面が電池蓋の板面と平行となるようにとりつけられていた。 In an assembled battery in which a large number of secondary batteries are connected, electrical connection is established by connecting terminals of different batteries with connecting rods. For example, as disclosed in Patent Document 5, in the conventional connection structure, the connection rod has a flat plate shape, and is attached so that the plane is parallel to the plate surface of the battery lid.
従来の組電池における端子と接続杆との接続構造の分解斜視図を図９に示す。図９において、１は薄形電池ケース、２は電池蓋、３は電池蓋に設けられた貫通孔、４は端子、４ａは端子の台座部、４ｂは端子の足部、４ｃは端子のボルト部、５は平板状接続杆、５ａは平板状接続杆の平面、５ｂは平板状接続杆の側面、５ｃは平板状接続杆に設けられた貫通孔、６はナット、７は電池蓋の貫通口３と端子４の間に設けた絶縁部材、８は電池蓋に設けられた安全弁である。 FIG. 9 shows an exploded perspective view of a connection structure between a terminal and a connecting rod in a conventional assembled battery. In FIG. 9, 1 is a thin battery case, 2 is a battery lid, 3 is a through hole provided in the battery lid, 4 is a terminal, 4a is a base portion of the terminal, 4b is a foot portion of the terminal, and 4c is a bolt of the terminal. , 5 is a flat connecting rod, 5a is a flat surface of the flat connecting rod, 5b is a side surface of the flat connecting rod, 5c is a through hole provided in the flat connecting rod, 6 is a nut, and 7 is a through hole of the battery lid. An insulating member 8 provided between the port 3 and the terminal 4 is a safety valve provided on the battery lid.
図９の電池では、電池蓋２に設けられた貫通孔３に絶縁部材７を差し込み、端子４の足部４ｂを絶縁部材７に設けられた貫通孔に貫通させることにより、絶縁された状態で端子４が電池蓋２にとりつけられている。 In the battery of FIG. 9, the insulating member 7 is inserted into the through hole 3 provided in the battery lid 2, and the foot 4 b of the terminal 4 is penetrated through the through hole provided in the insulating member 7. A terminal 4 is attached to the battery lid 2.
なお、絶縁部材７は、耐有機溶媒性を有する樹脂材料、ガラスハーメチックシール、セラミックスなどの絶縁体から構成されている。また、図９では示していないが、端子４の足部４ｂには電池内部の発電要素の正極または負極リードが結合されている。 The insulating member 7 is made of an insulating material such as a resin material having organic solvent resistance, a glass hermetic seal, and ceramics. Although not shown in FIG. 9, the positive or negative lead of the power generation element inside the battery is coupled to the foot 4 b of the terminal 4.
接続杆５は平板状で、平面に垂直方向に貫通孔５ｃが設けられている。端子４と接続枠５とは、端子４のボルト部４ｃを接続杆５に設けられた貫通孔５ｃに挿入し、ナット６を螺着することで接続固定される。 The connecting rod 5 has a flat plate shape and is provided with a through hole 5c in a direction perpendicular to the plane. The terminal 4 and the connection frame 5 are connected and fixed by inserting the bolt 4c of the terminal 4 into the through hole 5c provided in the connection rod 5 and screwing the nut 6 therethrough.
このように、図９に示すように、従来の接続構造では、平板状接続杆５はその平面５ａと電池蓋２の板面とが平行となるようにとりつけられていた。 Thus, as shown in FIG. 9, in the conventional connection structure, the flat connecting rod 5 is attached so that the flat surface 5 a and the plate surface of the battery lid 2 are parallel to each other.
図９に示した従来の接続構造では、端子４のボルト部４ｃが電池蓋２の板面に垂直であるため、ナット６を締めつける時のトルクが、端子の足部４ｂと電池蓋２とのとりつけ部の軸回り方向に直接加わり、端子４が回転方向にずれ、絶縁部材７を破損し易く、端子４と蓋板２との間の気密性が低下するという問題があった。 In the conventional connection structure shown in FIG. 9, the bolt portion 4 c of the terminal 4 is perpendicular to the plate surface of the battery lid 2, so that torque when the nut 6 is tightened is between the terminal foot portion 4 b and the battery lid 2. There is a problem that the terminal 4 is directly applied in the direction around the axis of the mounting portion, the terminal 4 is displaced in the rotational direction, the insulating member 7 is easily damaged, and the airtightness between the terminal 4 and the cover plate 2 is lowered.
特許文献３に記載のスペーサーを設けた組電池の場合、電池間に冷却風を流すすき間が必要なため、個々の電池が固定されず、不安定である。また、特許文献４に記載された組電池では、スペーサーと接続端子が一体化され、円筒型接続端子の間に単電池の端子を挟んでいるため、電池とスペーサーが交互に積層されて、電池は固定されているが、スペーサーに冷却用通路が必要となリ、スペーサーの構造が複雑になる。さらに、特許文献５に記載された接続構造では、電池間のすき間が大きくなり、組電池としての容積効率が低下するという問題があった。 In the case of the assembled battery provided with the spacer described in Patent Document 3, since a gap for flowing cooling air between the batteries is required, the individual batteries are not fixed and are unstable. Further, in the assembled battery described in Patent Document 4, since the spacer and the connection terminal are integrated, and the terminal of the unit cell is sandwiched between the cylindrical connection terminals, the battery and the spacer are alternately stacked. Is fixed, but a cooling passage is required for the spacer, which complicates the structure of the spacer. Furthermore, in the connection structure described in Patent Document 5, there is a problem that the gap between the batteries becomes large, and the volumetric efficiency as the assembled battery decreases.
また、従来の組電池においては、スペーサーと接続杆とは別々の部品であったため、部品点数が多く組電池の組立時間が長くなるという問題があった。 Further, in the conventional assembled battery, since the spacer and the connecting rod are separate parts, there is a problem that the number of parts is large and the assembly time of the assembled battery becomes long.
そこで本発明は、従来の組電池における上記問題点を解決するためになされたもので、その目的は、組電池化の際に電池の気密性をそこなうことなく、接続杆のとりつけが容易な、薄形電池用の組電池用スペーサーおよびこの組電池用スペーサーと薄形電池とを組み合わせた組電池を提供することにある。
請求項１の発明は、絶縁体からなる枠体と導電材からなる接続杆とが一体化された組電池用スペーサにおいて、前記枠体は、形状が平板状で、複数の単電池を収納する開口部を備え、最大厚みが単電池厚みよりも大きく、前記接続杆は、形状が平板状で、平面部分が前記枠体の平面部分と平行であることを特徴とする。 The invention of claim 1 is a battery pack spacer in which a frame made of an insulator and a connecting rod made of a conductive material are integrated, wherein the frame has a flat plate shape and houses a plurality of single cells. An opening is provided, the maximum thickness is larger than the unit cell thickness, and the connecting rod has a flat plate shape and a flat portion parallel to the flat portion of the frame.
請求項２の発明は、請求項１記載の組電池用スペーサーの枠体の開口部に複数の薄形電池を収納した小組電池において、前記薄形電池の蓋板に正・負極端子が設けられ、前記正・負極端子の上方に平板状接続部を備え、前記端子の平板状接続部は、前記薄形電池の前面と平行で、前記複数の薄形電池間を前記接続杆で直列に接続し、前記組電池用スペーサの両端の接続杆の一方は前記薄形電池の正極端子に、他方は負極端子に接続されたことを特徴とする。 According to a second aspect of the present invention, in the small assembled battery in which a plurality of thin batteries are accommodated in the opening of the frame of the assembled battery spacer according to the first aspect, positive and negative terminals are provided on the cover plate of the thin battery. A flat plate-like connecting portion above the positive and negative electrode terminals, the flat plate-like connecting portion of the terminal being parallel to the front surface of the thin battery and connecting the thin batteries in series with the connecting rod. One of the connecting rods at both ends of the assembled battery spacer is connected to the positive terminal of the thin battery, and the other is connected to the negative terminal.
請求項３の発明は、請求項２記載の小組電池を用いた組電池であって、小組電池を複数個積層し、前記複数の小組電池を直列または並列に接続したことを特徴とする。 A third aspect of the present invention is an assembled battery using the small assembled battery according to the second aspect, wherein a plurality of small assembled batteries are stacked, and the plurality of small assembled batteries are connected in series or in parallel.
請求項１の発明によれば、組電池用スペーサにおいて、絶縁体からなる枠体と導電材からなる接続杆とが一体化されているため、小組電池を組み立てる作業時間を大幅に短縮することができる。 According to the first aspect of the present invention, in the assembled battery spacer, since the frame body made of the insulator and the connecting rod made of the conductive material are integrated, the working time for assembling the small assembled battery can be greatly shortened. it can.
請求項２の発明によれば、端子の接続孔や接続溝、接続突起の穿設方向や突設方向が電池ケースと交差しないので、この端子に接続部材を接続する際のトルクや押圧力が、この端子の足部の電池ケースへのかしめ部や溶接部や圧接部に過度の負担を加えないようにすることができ、単電池間を接続する際の端子と蓋板の気密性が低下する恐れがなくなる。 According to the second aspect of the present invention, since the connecting hole and connecting groove of the terminal, the drilling direction and protruding direction of the connecting projection do not intersect with the battery case, torque and pressing force when connecting the connecting member to this terminal are reduced. It is possible to prevent an excessive load from being applied to the battery case caulked portion, welded portion and pressure contact portion of the terminal foot, and the airtightness between the terminal and the cover plate when connecting the cells is reduced. No fear of doing.
請求項３の発明によれば、平板状小組電池を積層するため、組電池の組立が容易で、また、小組電池の数を選択することで、使用目的の電圧、容量に応じた組電池とすることができる。 According to the invention of claim 3, since the flat small assembled batteries are stacked, the assembled battery is easy to assemble, and by selecting the number of small assembled batteries, the assembled battery according to the intended voltage and capacity can be used. can do.
図１は、本発明で用いる薄形電池の斜視図を示したものである。図１において、１１は薄形電池、１２は電池ケース、１３は電池蓋、１４は正極端子、１５は負極端子、１６は安全弁、１７は絶縁部材である。 FIG. 1 is a perspective view of a thin battery used in the present invention. In FIG. 1, 11 is a thin battery, 12 is a battery case, 13 is a battery lid, 14 is a positive terminal, 15 is a negative terminal, 16 is a safety valve, and 17 is an insulating member.
この薄形電池は、電池ケース１２の上面開口部に電池蓋１３を溶接などでとりつけたもので、正極端子１４および負極端子１５はいずれも絶縁部材１７を介して電池蓋１３にとりつけられている。 In this thin battery, a battery lid 13 is attached to the upper surface opening of the battery case 12 by welding or the like. Both the positive electrode terminal 14 and the negative electrode terminal 15 are attached to the battery lid 13 via an insulating member 17. .
図１に示すように、薄形電池の各コ−ナーをＡ〜Ｈとした場合、薄形電池の６つの面のうち、電池のおもて面（ＢＣＧＦ）とうら面（ＡＤＨＥ）が最大面積となる。また、この薄形電池では、短側面はＡＢＥＦ面とＤＣＧＨ面であり、蓋面はＡＢＣＤ面であり、底面はＥＦＧＨ面となる。 As shown in FIG. 1, when the corners of the thin battery are A to H, the battery front surface (BCGF) and the back surface (ADHE) are the largest among the six surfaces of the thin battery. It becomes the area. Further, in this thin battery, the short side surface is an ABEF surface and a DCGH surface, the lid surface is an ABCD surface, and the bottom surface is an EFGH surface.
本発明の薄形電池の高さをｈ、幅をｗ、厚みをｔとした場合、薄形電池とはｈおよびｗと比較してｔが小さい形状の電池を意味する。実用的な薄型電池では次の条件を満たすことが好ましい。 When the height of the thin battery of the present invention is h, the width is w, and the thickness is t, the thin battery means a battery having a shape with a smaller t than h and w. A practical thin battery preferably satisfies the following conditions.
ｔ＜ｈ／３、ｔ＜ｗ／３、ｔ＜２０ｍｍ
なお、本発明の薄形電池の形状は、ｔ＜ｈおよびｔ＜ｗを満たせば、図１のＸ−Ｘ’断面は、長方形・長円筒形いずれでもかまわない。
t <h / 3, t <w / 3, t <20mm
As long as the shape of the thin battery of the present invention satisfies t <h and t <w, the cross section XX ′ in FIG. 1 may be either a rectangular shape or a long cylindrical shape.
次に、本発明の組電池用スペーサーについて、例として開口部が２つのあるものについて説明する。図２は本発明の組電池用スペーサーの斜視図である。図２において、２１は枠体、２２は接続杆、２３は枠体の開口部、２４は枠体の凸部、２５は孔である。 Next, the assembled battery spacer of the present invention will be described as an example having two openings. FIG. 2 is a perspective view of the assembled battery spacer of the present invention. In FIG. 2, 21 is a frame, 22 is a connecting rod, 23 is an opening of the frame, 24 is a projection of the frame, and 25 is a hole.
枠体２１は、絶縁体からなる平板に２つの開口部を設けたものである。接続杆２２は導電材からなり、形状が平板状である。また、枠体２１の上部にはインサート成形または超音波溶着によって３つの接続杆２２が組み込まれている。接続杆２２は、端子の平面部の位置の公差できるようにフレキシブルに動く構造となっている。なお、端子位置の公差が小さい電池の場合は、接続杆は固定されていてもよい。そして、接続杆２２の平面部分が枠体２１の平面部分と平行になっている。 The frame body 21 is a flat plate made of an insulator provided with two openings. The connecting rod 22 is made of a conductive material and has a flat plate shape. In addition, three connecting rods 22 are incorporated in the upper portion of the frame body 21 by insert molding or ultrasonic welding. The connecting rod 22 has a structure that moves flexibly so that the tolerance of the position of the flat portion of the terminal can be made. In addition, in the case of a battery having a small terminal position tolerance, the connecting rod may be fixed. The plane portion of the connecting rod 22 is parallel to the plane portion of the frame body 21.
枠体の凸部２４は数箇所に設けられ、この部分が枠体の最大厚みとなっており、薄型電池の厚みよりも大きくなっている。そのため、組電池用スペーサーの開口部に薄型電池をはめ込んで、組電池用スペーサーを積層した場合、隣接する組電池用スペーサーの枠体の凸部２４同士が接触し、隣接する薄型電池の間には冷却用の空気通路が形成されることになる。 The convex part 24 of the frame is provided at several places, and this part is the maximum thickness of the frame, which is larger than the thickness of the thin battery. Therefore, when the thin battery is inserted into the opening of the assembled battery spacer and the assembled battery spacer is stacked, the projections 24 of the frame bodies of the adjacent assembled battery spacers are in contact with each other and the adjacent thin battery is between An air passage for cooling is formed.
なお、図２では開口部が２つある組電池用スペーサーを例示したが、開口部の数には特に制限はなく、開口部がＮ個ある組電池用スペーサーでは、接続杆はＮ＋１個となる。 In FIG. 2, the assembled battery spacer having two openings is illustrated, but the number of openings is not particularly limited, and in the assembled battery spacer having N openings, the number of connection rods is N + 1. .
図３は、本発明の小組電池の斜視図である。図３において、３１は枠体、３２、３３は薄型電池、３４、３５、３６は接続杆、３７は電池の端子と接続杆とを接続するボルトおよびナットである。 FIG. 3 is a perspective view of the small battery of the present invention. In FIG. 3, 31 is a frame, 32 and 33 are thin batteries, 34, 35 and 36 are connecting rods, and 37 is a bolt and a nut for connecting the battery terminals and connecting rods.
本発明の小組電池は、組電池用スペーサーの枠体３１の開口部に薄型電池３２、３３がはめ込まれ、一方の端の接続杆３４と薄型電池３２の負極端子とがボルト・ナットで電気的に接続され、中央の接続杆３５は、薄型電池３２の正極端子および薄型電池３３の負極端子とに接続され、他方の端の接続杆３６と薄型電池３３の正極端子とが接続されている。 In the small assembled battery of the present invention, the thin batteries 32 and 33 are fitted into the opening of the frame 31 of the assembled battery spacer, and the connecting rod 34 at one end and the negative terminal of the thin battery 32 are electrically connected by bolts and nuts. The connecting rod 35 at the center is connected to the positive terminal of the thin battery 32 and the negative terminal of the thin battery 33, and the connecting rod 36 at the other end is connected to the positive terminal of the thin battery 33.
なお、電池の端子と接続杆との電気的接続は、ボルト・ナット以外にも、リベットでかしめる方法や、直接溶接で接続する方法なども用いることができる。 For the electrical connection between the battery terminal and the connecting rod, a method of caulking with a rivet or a method of connecting by direct welding can be used besides bolts and nuts.
また、組電池用スペーサーの枠体３１の開口部の大きさは、薄型電池がその中に入り、枠体と薄型電池との間のすき間がほとんどない大きさとすることが好ましい。 Moreover, it is preferable that the size of the opening portion of the frame 31 of the assembled battery spacer is such that the thin battery enters therein and there is almost no gap between the frame and the thin battery.
図４は、本発明になる組電池の斜視図を示したものである。なお、図４では、例として、小組電池を４個組み合わせた組電池を示す。図４において、４１は小組電池、４２は一方の端の接続杆、４３は他方の端の接続杆である。この組電池は、小組電池の組電池用スペーサーの枠体３１に設けられた孔に、通しボルトを４本通し（図４では「通しボルト」は図示せず、１箇所のみ点線で示している）、４個の積層した小組電池を一体化している。 FIG. 4 is a perspective view of the assembled battery according to the present invention. In addition, in FIG. 4, the assembled battery which combined four small assembled batteries is shown as an example. In FIG. 4, 41 is a small battery, 42 is a connecting rod at one end, and 43 is a connecting rod at the other end. In this assembled battery, four through bolts are passed through holes provided in the frame 31 of the assembled battery spacer of the small assembled battery (in FIG. 4, “through bolt” is not shown, and only one place is indicated by a dotted line. ) Four stacked small batteries are integrated.
図３に示すような２個の単電池を備えた小組電池を４つ電気的に接続する方法は２種類ある。図５および図６は組電池を上方から見た接続状態を示し、図５は並列接続、図６は直列接続を示す。図５および図６において、５１は小組電池、５２は小組電池の正極端子、５３は小組電池の負極端子、５４はボルト、５５はナットである。 There are two methods for electrically connecting four small batteries having two single cells as shown in FIG. 5 and 6 show a connection state of the assembled battery as viewed from above, FIG. 5 shows a parallel connection, and FIG. 6 shows a series connection. 5 and 6, 51 is a small battery, 52 is a positive terminal of the small battery, 53 is a negative terminal of the small battery, 54 is a bolt, and 55 is a nut.
図５に示すように、隣接する小組電池の一方の端の接続杆をすべて負極、他方の端の接続杆をすべて正極となるように、多数の小組電池を積層し、負極側および正極側をそれぞれ通しボルトなどで接続固定すれば、多数の小組電池を並列に接続することができる。また、図６に示すように、隣接する小組電池の一方の端の接続杆を、正極と負極が交互に配置されるように多数の小組電池を積層し、隣接する正極と負極のみを接続固定すれば、多数の小組電池を直列に接続することができる。 As shown in FIG. 5, a large number of small batteries are stacked so that the connecting rods at one end of the adjacent small assembled cells are all negative, and the connecting rods at the other end are all positive. If each is fixedly connected with a through bolt or the like, a large number of small batteries can be connected in parallel. In addition, as shown in FIG. 6, a large number of small batteries are stacked so that the positive and negative electrodes are alternately arranged at one end of the adjacent small battery, and only the adjacent positive and negative electrodes are connected and fixed. By doing so, a large number of small batteries can be connected in series.
本発明の小組電池は、図３に示したように、組電池用スペーサーの枠体の開口部に薄型電池がはめ込まれ、接続杆と薄型電池の端子とが電気的に接続されている。この場合、図２に示すように、接続杆の平面部分が枠体の平面部分と平行になっているため、薄形電池の正極端子および負極端子は、この平板状接続杆と接続しやすいように、端子の上方に平板状接続部を備え、この端子の平板状接続部は薄形電池の前面と平行とする必要がある。 In the small assembled battery of the present invention, as shown in FIG. 3, the thin battery is fitted into the opening of the frame of the assembled battery spacer, and the connecting rod and the terminal of the thin battery are electrically connected. In this case, as shown in FIG. 2, since the flat portion of the connecting rod is parallel to the flat portion of the frame, the positive electrode terminal and the negative electrode terminal of the thin battery can be easily connected to the flat connecting rod. In addition, a flat connection portion is provided above the terminal, and the flat connection portion of the terminal needs to be parallel to the front surface of the thin battery.
図７は端子の平板状接続部の形状の例を示したもので、図７ａに示したような板状や、図７ｂに示した水平方向の断面が半円状の形状などを用いることができる。そして、接続杆と端子とをボルト・ナットやリベットで接続する場合には、端子の平板状接続部に貫通孔を設ける必要がある。 FIG. 7 shows an example of the shape of the flat connection portion of the terminal, and the plate shape as shown in FIG. 7a or the shape of the horizontal cross section shown in FIG. it can. And when connecting a connecting rod and a terminal with a volt | bolt, a nut, or a rivet, it is necessary to provide a through-hole in the flat connection part of a terminal.
なお、本発明において、枠体の厚みと薄型電池の厚みの関係は、枠体の最大厚みが単電池厚みよりも大きくすることにより、電池の間に冷却用の空気が流れる空間ができるようにすることができる。 In the present invention, the relationship between the thickness of the frame and the thickness of the thin battery is such that the maximum thickness of the frame is larger than the unit cell thickness so that a space for cooling air flows between the batteries. can do.
［実施例］
１）薄型電池
正極板は、正極活物質としてのコバルト酸リチウム（ＬｉＣｏＯ２）８７ｗｔ％と導電剤としてのアセチレンブラック５ｗｔ％と結着剤としてのポリフッ化ビニリデン（ＰＶｄＦ）８ｗｔ％との混合物にＮ−メチルピロリドン（ＮＭＰ）を加えて正極合剤ペーストとし、この正極合剤ペーストをアルミニウム箔製正極集電体（厚さ２０μｍ、幅９０ｍｍ、長さ５０００ｍｍ）の両面に塗布、乾燥することによって作製した。正極合剤層の片面厚みは０．０３ｍｍとした。なお、正極集電体の端部には正極合剤未塗布部を設け、この部分にリード端子を溶接して取り付けた。
[Example]
1) Thin Battery A positive electrode plate is formed by mixing N in a mixture of 87 wt% of lithium cobaltate (LiCoO 2 ) as a positive electrode active material, 5 wt% of acetylene black as a conductive agent, and 8 wt% of polyvinylidene fluoride (PVdF) as a binder. -Methylpyrrolidone (NMP) was added to form a positive electrode mixture paste, and this positive electrode mixture paste was prepared by applying and drying on both surfaces of an aluminum foil positive electrode current collector (thickness 20 μm, width 90 mm, length 5000 mm). did. The single-sided thickness of the positive electrode mixture layer was 0.03 mm. In addition, the positive electrode mixture uncoated part was provided in the edge part of a positive electrode electrical power collector, and the lead terminal was welded and attached to this part.
負極板は、負極活物質としてのグラファイト（黒鉛）９５ｗｔ％と結着剤としてのポリフッ化ビニリデン（ＰＶｄＦ）５ｗｔ％との混合物にＮ−メチルピロリドン（ＮＭＰ）を加えて負極合剤ペーストとし、この負極合剤ペーストを銅箔製負極集電体（厚さ１５μｍ、幅９０ｍｍ、長さ５１００ｍｍ）の両面に塗布、乾燥することによって作製した。負極合剤層の片面厚みは０．０４ｍｍとした。なお、負極集電体の端部には負極合剤未塗布部を設け、正極板の場合と同様にしてリード端子を溶接して取り付けた。 The negative electrode plate was prepared by adding N-methylpyrrolidone (NMP) to a mixture of 95 wt% of graphite (graphite) as a negative electrode active material and 5 wt% of polyvinylidene fluoride (PVdF) as a binder. The negative electrode mixture paste was applied to both surfaces of a copper foil negative electrode current collector (thickness 15 μm, width 90 mm, length 5100 mm) and dried. The single-sided thickness of the negative electrode mixture layer was 0.04 mm. In addition, the negative electrode mixture non-application part was provided in the edge part of the negative electrode collector, and the lead terminal was welded and attached similarly to the case of the positive electrode plate.
セパレータにはポリエチレン製微多孔膜（厚さ２５μｍ、幅８７ｍｍ、長さ１０８００ｍｍ）を用い、正極板と負極板とをセパレータを介して巻回し、扁平巻回形発電要素とした。この長円筒扁平形発電要素のリード端子部分を除いた大きさは、厚み１９ｍｍ、幅１２２ｍｍ、高さ６６ｍｍであった。 A polyethylene microporous membrane (thickness 25 μm, width 87 mm, length 10800 mm) was used as the separator, and the positive electrode plate and the negative electrode plate were wound through the separator to obtain a flat wound power generation element. The long cylindrical flat power generation element excluding the lead terminal portion had a thickness of 19 mm, a width of 122 mm, and a height of 66 mm.
電解液としては、エチレンカーボネート（ＥＣ）とエチルメチルカーボネート（ＥＭＣ）との体積比３：７混合溶媒に六フッ化リン酸リチウム（ＬｉＰＦ６）を１ｍｏｌ／Ｌ溶解したものを用いた。 As the electrolytic solution, a solution in which 1 mol / L of lithium hexafluorophosphate (LiPF 6 ) was dissolved in a 3: 7 mixed solvent of ethylene carbonate (EC) and ethyl methyl carbonate (EMC) was used.
電池ケースは外形寸法が厚み２０ｍｍ、幅９０ｍｍ、高さ７０ｍｍであるステンレス鋼製とし、この電池容器に扁平巻回形発電要素を収納し、発電要素の正極および負極のリード端子と電池蓋の正極端子および負極端子とを接続した後、電解液を注入し、ステンレス鋼製の電池蓋と電池ケースとをレーザー溶接して、薄型電池を得た。得られた薄型電池の重量は約０．３２Ｋｇで、電圧は約４Ｖ、設計容量は７Ａｈとした。 The battery case is made of stainless steel with outer dimensions of 20 mm in thickness, 90 mm in width, and 70 mm in height. A flat wound power generation element is housed in this battery container, and the positive electrode of the power generation element, the lead terminal of the negative electrode, and the positive electrode of the battery lid After connecting the terminal and the negative electrode terminal, an electrolyte solution was injected, and a stainless steel battery lid and a battery case were laser welded to obtain a thin battery. The weight of the obtained thin battery was about 0.32 kg, the voltage was about 4 V, and the design capacity was 7 Ah.
得られた薄型電池の正極端子および負極端子の形状は、図７ａに示したのと同じ、基部が円柱で、上部が平板状とした。
２）組電池用スペーサー
組電池用スペーサーは枠体と接続杆とからなる。枠体はＡＢＳ樹脂からなり、枠体はアルミニウム製である。枠体は図２に示したような形状に成形し、同時に図２に示したように、３つの接続杆をインサート成形し、枠体と接続杆とを一体化する。得られた組電池用スペーサーにおいては、図２に示すように、接続杆の平面部分が枠体の平面部分と平行になっている。この組電池用スペーサーの重量は約５６ｇとした。
The shape of the positive electrode terminal and the negative electrode terminal of the obtained thin battery was the same as that shown in FIG.
2) Assembly battery spacer The assembly battery spacer consists of a frame and a connecting rod. The frame is made of ABS resin, and the frame is made of aluminum. The frame is formed into a shape as shown in FIG. 2, and at the same time, as shown in FIG. 2, three connecting rods are insert-molded to integrate the frame and the connecting rod. In the assembled battery spacer obtained, as shown in FIG. 2, the planar portion of the connecting rod is parallel to the planar portion of the frame. The weight of the assembled battery spacer was about 56 g.
枠体の接続杆取り付け部分を除いた外形寸法は幅２５７ｍｍ、高さ９５ｍｍとし、２つの開口部の大きさはいずれも幅１１１ｍｍ、高さ７５ｍｍであり、枠体の凸部の厚みは３ｍｍ、凸部以外の厚みは２ｍｍとした。なお、枠体の凸部を設けていない場所に、ボルトを通すための孔を数箇所設けた。接続杆の大きさは厚み３ｍｍ、幅５２ｍｍ、高さ１２ｍｍで、２箇所に電池の端子と接続するための孔を設けた。
３）小組電池
小組電池は、組電池用スペーサーの枠体の２つの開口部に、２つの薄型電池をはめ込み、組電池用スペーサーの接続杆と薄型電池の正極端子および負極端子とをボルト・ナットで接続したものである。得られた小組電池は２つの薄型電池を直列に接続したもので、端子電圧は約８Ｖとなる。
The outer dimensions of the frame excluding the connecting rod mounting part are 257 mm wide and 95 mm high, and the two openings are 111 mm wide and 75 mm high, and the thickness of the convex part of the frame is 3 mm. The thickness other than the protrusions was 2 mm. In addition, several holes for passing bolts were provided in places where no protrusions were provided on the frame. The size of the connecting rod was 3 mm in thickness, 52 mm in width, and 12 mm in height, and holes for connecting to battery terminals were provided in two places.
3) Small battery pack The small battery pack has two thin batteries fitted in the two openings of the battery pack spacer frame, and the connecting rod of the battery pack spacer and the positive and negative terminals of the thin battery are bolts and nuts. It is connected with. The obtained small assembled battery is obtained by connecting two thin batteries in series, and the terminal voltage is about 8V.
小組電池の形状は図３に示したものと同じであり、接続杆と薄型電池の端子との接続部分の構造は図７ａに示したものと同じである。
４）組電池
組電池は、図４に示したのと類似の形状であり、１０個の小組電池を平面同士が向かい合うように、また隣接する小組電池の一方の端の接続杆を正極と負極が交互に配置されるように積層し、小組電池の組電池用スペーサーの枠体に設けられた孔に、通しボルトを４本通し、１０個の積層した小組電池を一体化した。
The shape of the small battery is the same as that shown in FIG. 3, and the structure of the connecting portion between the connecting rod and the terminal of the thin battery is the same as that shown in FIG. 7a.
4) The assembled battery The assembled battery has a shape similar to that shown in FIG. 4, so that the 10 small assembled batteries face each other, and the connecting rod at one end of the adjacent small assembled battery is connected to the positive electrode and the negative electrode. Are stacked so that four through bolts are passed through holes provided in the frame body of the assembled battery spacer of the small assembled battery, and 10 stacked small assembled batteries are integrated.
次に、隣接する正極と負極の一組をボルト・ナットで接続固定すれば、１０個の小組電池を直列に接続した、端子電圧が約８０Ｖの組電池が得られる。 Next, if a set of adjacent positive and negative electrodes is connected and fixed with bolts and nuts, an assembled battery having 10 terminal batteries connected in series and having a terminal voltage of about 80V can be obtained.
［比較例］
実施例で用いたのと同じ薄型電池を２０個用い、すべて直列に接続した組電池を作製した。この組電池の接続状態を図８に示す。図８において、８１は薄型電池、８２は正極端子、８３は負極端子、８４は接続杆、８５はスペーサーである。
[Comparative example]
An assembled battery in which 20 pieces of the same thin batteries used in the examples were used and all were connected in series was produced. The connection state of this assembled battery is shown in FIG. In FIG. 8, 81 is a thin battery, 82 is a positive terminal, 83 is a negative terminal, 84 is a connecting rod, and 85 is a spacer.
この組電池は、図８に示すように、薄型電池を１０個づつ２列に並べ、図８に示すように隣接する薄型電池の正極端子と負極端子とを順に接続し、すべての電池が直列に接続され、端子電圧は約８０Ｖと、実施例の組電池と同じ端子電圧となる。 In this assembled battery, as shown in FIG. 8, 10 thin batteries are arranged in two rows, and the positive and negative terminals of adjacent thin batteries are connected in order as shown in FIG. The terminal voltage is about 80 V, which is the same terminal voltage as the assembled battery of the example.
ただし、この比較例の組電池では、各薄型電池を接続する場合、接続杆などの部品が多く、各薄型電池の間にスペーサーを入れて、各薄型電池間に空間を形成する必要があり、さらに、２０個の薄型電池をひとつにまとめた組電池とするためには、すべての電池を固定して一体化するための部品が必要で、組電池に擦るための部品が多く、実施例の組電池の組立時間に比べて、２倍以上の時間が必要であった。 However, in the assembled battery of this comparative example, when connecting each thin battery, there are many parts such as connecting rods, and it is necessary to put a spacer between each thin battery to form a space between each thin battery, Furthermore, in order to make an assembled battery in which 20 thin batteries are combined into one, parts for fixing and integrating all the batteries are necessary, and there are many parts for rubbing against the assembled batteries. Compared to the assembly time of the assembled battery, more than twice the time was required.
２１、３１ 枠体
２２、３４、３５、３６ 接続杆
２３ 枠体の開口部
２４ 枠体の凸部
３２、３３は薄型電池
４１、５１ 小組電池
21, 31 Frame body 22, 34, 35, 36 Connecting rod 23 Opening portion of frame body 24 Convex portion of frame body 32, 33 is thin battery 41, 51 Small battery
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008123568A JP5146092B2 (en) | 2008-05-09 | 2008-05-09 | Battery assembly spacer and battery assembly using the same |
Applications Claiming Priority (1)
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