JP6481345B2 - Power storage device module manufacturing method and power storage device module - Google Patents

Power storage device module manufacturing method and power storage device module Download PDF

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JP6481345B2
JP6481345B2 JP2014240046A JP2014240046A JP6481345B2 JP 6481345 B2 JP6481345 B2 JP 6481345B2 JP 2014240046 A JP2014240046 A JP 2014240046A JP 2014240046 A JP2014240046 A JP 2014240046A JP 6481345 B2 JP6481345 B2 JP 6481345B2
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power storage
storage device
heat transfer
transfer plate
pair
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JP2016103342A (en
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正博 山田
正博 山田
加藤　崇行
崇行 加藤
浩生 植田
浩生 植田
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Toyota Industries Corp
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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
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    • 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

Description

本発明は、蓄電装置モジュールに関する。   The present invention relates to a power storage device module.

従来より、筐体内に複数の蓄電装置が伝熱板を介して重ねて配置され、これらの蓄電装置が互いに直列又は並列に接続された蓄電装置モジュールが知られている。   2. Description of the Related Art Conventionally, a power storage device module is known in which a plurality of power storage devices are stacked in a casing via a heat transfer plate, and these power storage devices are connected in series or in parallel with each other.

特開２０１４−１８６７９３号公報JP 2014-186793 A

蓄電装置モジュールは全体として大きなエネルギーを貯蔵しているため、蓄電装置モジュールにはさらなる安全性が求められる。   Since the power storage device module stores a large amount of energy as a whole, the power storage device module is required to have further safety.

本発明は、上記課題に鑑みてなされたものであり、蓄電装置モジュールの安全性をより高めることのできる、蓄電装置モジュールの製造方法を提供する。   This invention is made | formed in view of the said subject, and provides the manufacturing method of the electrical storage apparatus module which can improve the safety | security of an electrical storage apparatus module more.

本発明者らが検討したところ、蓄電装置モジュールのケース同士の絶縁を確保することが安全性向上に大きく寄与することを見いだし、本発明に想到した。   As a result of investigations by the present inventors, it has been found that securing insulation between cases of a power storage device module greatly contributes to improvement in safety, and the present invention has been conceived.

本発明に係る蓄電装置モジュールの製造方法は、金属ケース及び一対の電極端子を有する複数の蓄電装置、少なくとも１つの伝熱板、及び、複数の絶縁シートを、一対の前記蓄電装置の金属ケース間に前記伝熱板がそれぞれ挟まれ、かつ、前記金属ケースと前記伝熱板との間にそれぞれ前記絶縁シートが挟まれるように配置する工程と、
前記配置する工程の後に、各前記一対の蓄電装置の金属ケース間の絶縁試験を行う工程と、を備える。 A method for manufacturing a power storage device module according to the present invention includes a plurality of power storage devices having a metal case and a pair of electrode terminals, at least one heat transfer plate, and a plurality of insulating sheets between the metal cases of the pair of power storage devices. The heat transfer plates are respectively sandwiched, and the insulating sheet is disposed between the metal case and the heat transfer plate, respectively,
And a step of performing an insulation test between the metal cases of the pair of power storage devices after the arranging step.

本発明によれば、絶縁シートの絶縁不良による金属ケース間の絶縁不良を簡易に検出できる。特に、伝熱板と金属ケースとの間の絶縁をそれぞれ測定することに比べて、工程数を減らしつつ、金属ケース間の絶縁不良の有無を確認できる。金属ケース間が導通していると、蓄電装置パックの使用時等に何らかの不具合によりいずれかの金属ケースが導電性の部材と接触した場合に、電流の流れるルートが形成され、不具合が生じる場合がある。金属ケース間の絶縁を確保することにより、蓄電装置モジュールの安全性が向上する。   According to the present invention, it is possible to easily detect an insulation failure between metal cases due to an insulation failure of an insulating sheet. In particular, it is possible to confirm the presence or absence of an insulation failure between the metal cases while reducing the number of steps as compared to measuring the insulation between the heat transfer plate and the metal case. If the metal cases are conductive, when any of the metal cases comes into contact with the conductive member due to some trouble when the power storage device pack is used, a route through which a current flows is formed, and the trouble may occur. is there. By securing the insulation between the metal cases, the safety of the power storage device module is improved.

ここで、上記製造方法は、前記複数の蓄電装置を電気的に直列又は並列に接続する工程をさらに備え、前記接続する工程を、前記絶縁試験を行う工程の後に行うことができる。   Here, the manufacturing method further includes a step of electrically connecting the plurality of power storage devices in series or in parallel, and the connecting step can be performed after the step of performing the insulation test.

これによれば、蓄電装置同士が電気的に接続される前に絶縁試験を行うので、絶縁試験で誤って、電極やバスバーに導通試験部材が触れた場合の安全性が高まる。   According to this, since the insulation test is performed before the power storage devices are electrically connected to each other, the safety when the continuity test member touches the electrode or the bus bar by mistake in the insulation test is increased.

本発明に係る蓄電装置モジュールは、ケース及び一対の電極端子を有する複数の蓄電装置、少なくとも１つの伝熱板、及び、複数の絶縁シートを備える。そして、一対の前記蓄電装置のケース間に前記伝熱板がそれぞれ挟まれ、かつ、前記ケースと前記伝熱板との間にそれぞれ前記絶縁シートが挟まれている。   The power storage device module according to the present invention includes a plurality of power storage devices having a case and a pair of electrode terminals, at least one heat transfer plate, and a plurality of insulating sheets. The heat transfer plate is sandwiched between a pair of power storage device cases, and the insulating sheet is sandwiched between the case and the heat transfer plate.

これによれば、金属ケース間の絶縁を確保しやすい。   According to this, it is easy to ensure the insulation between metal cases.

本発明によれば、蓄電装置モジュールの安全性をより高めることができる。   According to the present invention, the safety of the power storage device module can be further increased.

図１は、蓄電装置、伝熱板、及び、絶縁シートの概略斜視図である。FIG. 1 is a schematic perspective view of a power storage device, a heat transfer plate, and an insulating sheet. 図２は、蓄電装置、伝熱板、及び、絶縁シートを並べたアセンブリを示す上面図である。FIG. 2 is a top view showing an assembly in which a power storage device, a heat transfer plate, and an insulating sheet are arranged. 図３は、図２のアセンブリの蓄電装置を直列に接続した状態を示す上面図である。FIG. 3 is a top view showing a state where the power storage devices of the assembly of FIG. 2 are connected in series.

本発明の１実施形態に係る製造方法を図面を参照して説明する。なお、各図において同一又は相当する要素については同一の符号を付し、重複する説明を省略する。   A manufacturing method according to an embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the element which is the same or it corresponds in each figure, and the overlapping description is abbreviate | omitted.

まず、図１に示すような、蓄電装置１０、伝熱板２０、及び、絶縁シート３０をそれぞれ複数用意する。   First, as shown in FIG. 1, a plurality of power storage devices 10, heat transfer plates 20, and insulating sheets 30 are prepared.

蓄電装置１０は、金属ケース１２、電解液、電極組立体１８を主に備えている。金属ケース１２は、電解液及び電極組立体１８を収容するケースである。電解液は、金属ケース１２内に収容され、電極組立体１８内に含浸される。電解液は、例えば、非水系の電解液である。   The power storage device 10 mainly includes a metal case 12, an electrolytic solution, and an electrode assembly 18. The metal case 12 is a case for accommodating the electrolytic solution and the electrode assembly 18. The electrolytic solution is accommodated in the metal case 12 and impregnated in the electrode assembly 18. The electrolytic solution is, for example, a non-aqueous electrolytic solution.

電極組立体１８は、図示は省略するが、複数の正極、複数の負極、及び、正極及び負極間を絶縁するセパレータを備え、これらを積層した構造を有する。このような正極、負極、セパレータとしては、公知の種々のものを利用できる。   Although not shown, the electrode assembly 18 includes a plurality of positive electrodes, a plurality of negative electrodes, and a separator that insulates between the positive and negative electrodes, and has a structure in which these are stacked. As such positive electrode, negative electrode, and separator, various known ones can be used.

金属ケース１２は、箱形状をなし、矩形平板状の底板１２ｂと、底板１２ｂの長辺２辺から垂直な方向に延びる矩形平板状の２つの大側板１２ｓａと、底板１２ｂの短辺２辺から垂直な方向に延びる矩形平板状の２つの小側板１２ｓｂと、これらの大側板１２ｓａ、及び小側板１２ｓｂに接続されて底板１２ｂと対向する天板１２ｔとから構成される。   The metal case 12 has a box shape and includes a rectangular flat plate-shaped bottom plate 12b, two rectangular flat plate-shaped large side plates 12sa extending in a direction perpendicular to two long sides of the bottom plate 12b, and two short sides of the bottom plate 12b. The rectangular plate-shaped two small side plates 12sb extending in the vertical direction, the large side plate 12sa, and the top plate 12t connected to the small side plate 12sb and facing the bottom plate 12b.

天板１２ｔには、正極端子（電極端子）１４及び負極端子（電極端子）１６が設けられている。正極端子１４及び負極端子１６は金属製の柱体であり、絶縁部材１３により天板１２ｔに対して電気的に絶縁され、天板１２ｔを貫通して配置されている。図示は省略するが、正極端子１４は電極組立体１８の正極と接続され、負極端子１６は電極組立体１８の負極と接続されている。   The top plate 12t is provided with a positive terminal (electrode terminal) 14 and a negative terminal (electrode terminal) 16. The positive electrode terminal 14 and the negative electrode terminal 16 are metal pillars, and are electrically insulated from the top plate 12t by the insulating member 13, and are disposed through the top plate 12t. Although not shown, the positive electrode terminal 14 is connected to the positive electrode of the electrode assembly 18, and the negative electrode terminal 16 is connected to the negative electrode of the electrode assembly 18.

正極端子１４及び負極端子１６の先端には、端子間配線用のバスバーを固定するためのねじ穴１４ａ、１６ａが設けられている。   Screw holes 14a and 16a for fixing a bus bar for inter-terminal wiring are provided at the tips of the positive electrode terminal 14 and the negative electrode terminal 16.

このような蓄電装置１０の具体例はリチウムイオン二次電池、電気二重層キャパシタである。   Specific examples of such a power storage device 10 are a lithium ion secondary battery and an electric double layer capacitor.

伝熱板２０は、蓄電装置１０で発生した熱を外部に逃がすための部材であり、蓄電装置１０毎に取り付けられる。伝熱板２０は、熱伝導率が高い材料、例えば、銅、アルミニウム等の金属で形成される。伝熱板２０の断面はＬ字形状であり、金属ケース１２の大側板１２ｓａと対向する板状の受熱部２０ａと、受熱部２０ａの一端から垂直に延びる板状の放熱部２０ｂとを有する。   The heat transfer plate 20 is a member for releasing the heat generated in the power storage device 10 to the outside, and is attached to each power storage device 10. The heat transfer plate 20 is formed of a material having high thermal conductivity, for example, a metal such as copper or aluminum. The cross section of the heat transfer plate 20 is L-shaped, and includes a plate-shaped heat receiving portion 20a facing the large side plate 12sa of the metal case 12, and a plate-shaped heat radiating portion 20b extending vertically from one end of the heat receiving portion 20a.

絶縁シート３０は、電気絶縁材料、例えば、樹脂で形成された板である。本実施形態の絶縁シート３０は、樹脂製の絶縁フィルム３１、及び、絶縁フィルム３１の両面にそれぞれ設けられた粘着層３２を有する。絶縁シート３０の大きさは、大側板１２ｓａと同等とされている。   The insulating sheet 30 is a plate made of an electrically insulating material, for example, resin. The insulating sheet 30 of this embodiment includes a resin insulating film 31 and adhesive layers 32 provided on both surfaces of the insulating film 31. The size of the insulating sheet 30 is equivalent to that of the large side plate 12sa.

絶縁シートの厚みは特に限定されないが、０．１〜０．２ｍｍ程度とすることができる。   The thickness of the insulating sheet is not particularly limited, but can be about 0.1 to 0.2 mm.

続いて、蓄電装置１０、伝熱板２０、及び、絶縁シート３０を図２に示すように重ね、固定して、アセンブリ９０を作製する。具体的には、蓄電装置１０、伝熱板２０、及び、絶縁シート３０を、一対の蓄電装置１０の金属ケース１２の大側板１２ｓａ間に伝熱板２０がそれぞれ挟まれ、かつ、金属ケース１２と伝熱板２０との間にそれぞれ絶縁シート３０が挟まれるように配置する。伝熱板２０の受熱部２０ａが絶縁シート３０を介して金属ケース１２の大側板１２ｓａと対向し、伝熱板２０の放熱部２０ｂが金属ケース１２の小側板１２ｓｂと対向するように、伝熱板２０が配置される。   Subsequently, the power storage device 10, the heat transfer plate 20, and the insulating sheet 30 are stacked and fixed as shown in FIG. Specifically, the heat transfer plate 20 is sandwiched between the large side plates 12sa of the metal case 12 of the pair of power storage devices 10, and the metal case 12 is connected to the power storage device 10, the heat transfer plate 20, and the insulating sheet 30. And the heat transfer plate 20 are arranged so that the insulating sheet 30 is sandwiched between them. Heat transfer so that the heat receiving portion 20a of the heat transfer plate 20 faces the large side plate 12sa of the metal case 12 via the insulating sheet 30, and the heat radiating portion 20b of the heat transfer plate 20 faces the small side plate 12sb of the metal case 12. A plate 20 is arranged.

このようにするには、例えば、蓄電装置１０の２つの大側板１２ｓａにそれぞれ絶縁シート３０を貼りつけ、次に、蓄電装置１０の一方の絶縁シート３０に伝熱板２０を貼りつけ、次に、蓄電装置１０の他方の絶縁シート３０に他の蓄電装置１０の伝熱板２０を貼りつければよい。   To do this, for example, the insulating sheet 30 is attached to each of the two large side plates 12sa of the power storage device 10, and then the heat transfer plate 20 is attached to one insulating sheet 30 of the power storage device 10, and then The heat transfer plate 20 of the other power storage device 10 may be attached to the other insulating sheet 30 of the power storage device 10.

特に、本実施形態では、複数の蓄電装置１０を直列接続するため、隣り合う一対の蓄電装置１０において、正極端子１４と負極端子１６とがそれぞれ向き合うように、蓄電装置１０が配置される。 In particular, in the present embodiment, since the series connection of the plurality of power storage device 10, in a pair of power storage device 10 adjacent, a positive electrode terminal 14 and the negative terminal 16 so as to face each power storage device 10 is placed.

続いて、これら蓄電装置１０、伝熱板２０、及び、絶縁シート３０のアセンブリ９０を、蓄電装置１０が並ぶ方向、すなわち、蓄電装置１０の厚み方向から一対のエンドプレート４０で挟み、エンドプレート４０に設けられた複数の貫通孔を貫通する複数のボルト４２及びナット４４により、エンドプレート４０、４０を固定する。これにより、アセンブリ９０が強固に固定されることになる。   Subsequently, the assembly 90 of the power storage device 10, the heat transfer plate 20, and the insulating sheet 30 is sandwiched between the pair of end plates 40 from the direction in which the power storage devices 10 are arranged, that is, the thickness direction of the power storage device 10. The end plates 40 and 40 are fixed by a plurality of bolts 42 and nuts 44 penetrating through the plurality of through holes provided in. As a result, the assembly 90 is firmly fixed.

続いて、導通テスター２００の２つの端子を、隣り合う一対の蓄電装置１０の金属ケース１２にそれぞれ接触させ、隣り合う一対の蓄電装置１０間の電気的絶縁が確保されているか否かを確認する。   Subsequently, the two terminals of the continuity tester 200 are respectively brought into contact with the metal cases 12 of the pair of adjacent power storage devices 10 to check whether electrical insulation between the pair of adjacent power storage devices 10 is ensured. .

この絶縁試験において絶縁不良が生じていることが確認された場合には、例えば、金属ケース１２間に配置される一対の絶縁シート３０を張り替えて、再び、検査する。   When it is confirmed in this insulation test that an insulation failure has occurred, for example, the pair of insulating sheets 30 arranged between the metal cases 12 are replaced and inspected again.

絶縁状態が確認された後、図３に示すように、複数の蓄電装置１０を電気的に直列に接続する。具体的には、隣り合う正極端子１４及び負極端子１６の上に導電性のバスバー８０を掛け渡し、バスバー８０に設けられた貫通孔を貫通してボルト８２を正極端子１４及び負極端子１６のねじ穴１４ａ、１６ａにネジ込むことで、バスバー８０を各端子に対して固定する。   After the insulation state is confirmed, as shown in FIG. 3, a plurality of power storage devices 10 are electrically connected in series. Specifically, a conductive bus bar 80 is passed over the adjacent positive electrode terminal 14 and negative electrode terminal 16, and the bolt 82 is screwed into the positive electrode terminal 14 and the negative electrode terminal 16 through a through hole provided in the bus bar 80. The bus bar 80 is fixed to each terminal by screwing into the holes 14a and 16a.

その後、必要に応じて、エンドプレート４０を、熱伝導性のベース板５０に固定部材６０で固定し、さらに、各伝熱板２０の放熱部２０ｂとベース板５０とに接触するように、例えば、ＴＩＭとよばれるカーボンファイバー製等の伝熱シート７０を放熱部２０ｂとベース板５０との間に配置する。このような蓄電装置１０の集合体である蓄電装置モジュール９２は、必要に応じて容器に収容されて、フォークリフトなどの電池パックとして利用できる。   Thereafter, if necessary, the end plate 40 is fixed to the heat conductive base plate 50 with the fixing member 60, and further, for example, in contact with the heat radiating portion 20b of each heat transfer plate 20 and the base plate 50, A heat transfer sheet 70 made of carbon fiber or the like called TIM is disposed between the heat radiating portion 20 b and the base plate 50. The power storage device module 92 that is an assembly of such power storage devices 10 is housed in a container as necessary, and can be used as a battery pack such as a forklift.

続いて、本実施形態の作用を説明する。伝熱板２０の両側にはそれぞれ絶縁シート３０が配置されているので、一方の絶縁シート３０の破損等により絶縁不良が生じていても、隣り合う一対の蓄電装置１０間の絶縁は維持される。しかしながら、両方の絶縁シート３０が配置の際の破損等により絶縁不良を生じていると、隣り合う一対の蓄電装置１０間が短絡することになる。そして、このように金属ケース１２同士が短絡していると、蓄電装置パックの使用時等に何らかの不具合によりいずれかの金属ケース１２が導電性の部材と接触した場合に、電流の流れるルートが形成され、不具合が生じる場合がある。金属ケース１２間の絶縁を確実に確保することにより、蓄電装置モジュールの安全性が向上する。   Then, the effect | action of this embodiment is demonstrated. Since the insulating sheets 30 are disposed on both sides of the heat transfer plate 20, the insulation between a pair of adjacent power storage devices 10 is maintained even if an insulation failure occurs due to damage or the like of one insulating sheet 30. . However, if both insulating sheets 30 are defective in insulation due to breakage or the like during arrangement, a pair of adjacent power storage devices 10 are short-circuited. If the metal cases 12 are short-circuited in this way, a route through which a current flows is formed when any metal case 12 comes into contact with a conductive member due to some trouble during use of the power storage device pack or the like. May cause problems. By ensuring the insulation between the metal cases 12, the safety of the power storage device module is improved.

また、本実施形態によれば、絶縁シート３０の絶縁不良による金属ケース間の絶縁不良を極めて簡易に検出できる。特に、導通テスター２００にて伝熱板２０と金属ケース１２との間の絶縁をそれぞれ測定することに比べて、工程数を大幅に減らしつつ、金属ケース１２間の絶縁不良の有無を確実に確認できる。   Moreover, according to this embodiment, the insulation failure between metal cases by the insulation failure of the insulating sheet 30 can be detected very easily. In particular, as compared to measuring the insulation between the heat transfer plate 20 and the metal case 12 with the continuity tester 200, the number of processes is greatly reduced and the presence or absence of insulation failure between the metal cases 12 is reliably confirmed. it can.

本発明は上記実施形態に限定されず、様々な変形態様が可能である。例えば、金属ケースの形状は上記形状に限定されず、表面に電気絶縁性の部材を有していても良い。一部でも金属部分が露出していれば検査は可能である。また、伝熱板の形状も特に限定されない。   The present invention is not limited to the above embodiment, and various modifications can be made. For example, the shape of the metal case is not limited to the above shape, and may have an electrically insulating member on the surface. An inspection is possible if even a part of the metal part is exposed. Further, the shape of the heat transfer plate is not particularly limited.

また、蓄電装置の数は２以上であれば良く、数に制限はない。   The number of power storage devices may be two or more, and the number is not limited.

また、上記実施形態では、複数の蓄電装置を直列に接続しているが、並列に接続することも可能である。   Moreover, in the said embodiment, although the several electrical storage apparatus is connected in series, it is also possible to connect in parallel.

また、上記実施形態では、絶縁シート３０は、その両面に粘着層３２を有しているが、粘着層を有さなくても実施可能である。   Moreover, in the said embodiment, although the insulating sheet 30 has the adhesion layer 32 on the both surfaces, it can implement even if it does not have an adhesion layer.

１２…金属ケース、１４…正極端子（電極端子）、１６…負極端子（電極端子）、２０…伝熱板、３０…絶縁シート。   DESCRIPTION OF SYMBOLS 12 ... Metal case, 14 ... Positive electrode terminal (electrode terminal), 16 ... Negative electrode terminal (electrode terminal), 20 ... Heat-transfer plate, 30 ... Insulating sheet.

Claims (3)

金属ケース及び一対の電極端子を有する複数の蓄電装置、少なくとも１つの伝熱板、及び、複数の絶縁シートを、一対の前記蓄電装置の金属ケース間に前記伝熱板がそれぞれ挟まれ、かつ、前記金属ケースと前記伝熱板との間にそれぞれ前記絶縁シートが挟まれるように配置する工程と、
前記配置する工程の後に、導通テスターの２つの端子を各前記一対の蓄電装置の金属ケースにそれぞれ接触させて、各前記一対の蓄電装置の金属ケース間の絶縁試験を行う工程と、
を備える、蓄電装置モジュールの製造方法。 A plurality of power storage devices having a metal case and a pair of electrode terminals, at least one heat transfer plate, and a plurality of insulating sheets, each of the heat transfer plates being sandwiched between a pair of metal cases of the power storage device; and Arranging the insulating sheet so as to be sandwiched between the metal case and the heat transfer plate, and
After the step of placing, the two terminals of the continuity tester are brought into contact with the metal cases of the pair of power storage devices, respectively, and an insulation test between the metal cases of the pair of power storage devices is performed.
A method for manufacturing a power storage device module. 前記複数の蓄電装置を電気的に直列又は並列に接続する工程をさらに備え、
前記接続する工程を、前記絶縁試験を行う工程の後に行う、請求項１に記載の方法。 Further comprising the step of electrically connecting the plurality of power storage devices in series or in parallel;
The method according to claim 1, wherein the connecting step is performed after the step of performing the insulation test. ケース及び一対の電極端子を有する複数の蓄電装置、少なくとも１つの伝熱板、及び、複数の絶縁シートを備え、
一対の前記蓄電装置のケース間に前記伝熱板がそれぞれ挟まれ、かつ、前記ケースと前記伝熱板との間にそれぞれ前記絶縁シートが挟まれ、
請求項１又は２に記載の蓄電装置モジュールの製造方法により得られた、蓄電装置モジュール。
A plurality of power storage devices having a case and a pair of electrode terminals, at least one heat transfer plate, and a plurality of insulating sheets;
The heat transfer plate is sandwiched between a pair of power storage device cases, and the insulating sheet is sandwiched between the case and the heat transfer plate, respectively.
The electrical storage apparatus module obtained by the manufacturing method of the electrical storage apparatus module of Claim 1 or 2.
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