JP2017098040A - Manufacturing method of battery - Google Patents

Manufacturing method of battery Download PDF

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JP2017098040A
JP2017098040A JP2015227998A JP2015227998A JP2017098040A JP 2017098040 A JP2017098040 A JP 2017098040A JP 2015227998 A JP2015227998 A JP 2015227998A JP 2015227998 A JP2015227998 A JP 2015227998A JP 2017098040 A JP2017098040 A JP 2017098040A
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battery
heating surface
batteries
interposition
heating
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吉田　賢司
Kenji Yoshida
賢司 吉田
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Toyota Motor 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
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a battery capable of shortening the time required for a temperature rise step in which a temperature of a plurality of non-sealed batteries alternately laminated and restricted via an interposing member is made rise.SOLUTION: A manufacturing method of a battery 1 includes the steps of: placing a restriction body 150 of a plurality of batteries 1x and an interposing member 110 on a heater 210 including a heating surface 210a on which a plurality of suction holes 210h are opened in such a manner that battery bottoms 10b are positioned on the suction holes 210h and that a member bottom 113b is abutted to the heating surface 210a; sucking air AR via the suction holes 210h and making a temperature of the interposing member 110 and the batteries 1c rise via the heating surface 210a while circulating the air AR also through a gap SK between the heating surface 210a and the member bottom 113b; and reducing a pressure within the batteries 1x of which the temperature has been made rise, and drying the inside of the batteries.SELECTED DRAWING: Figure 6

Description

本発明は、介在部材を介して交互に複数積層し拘束した未封口の電池を昇温させ、昇温した各々の電池の内部を減圧して乾燥させる電池の製造方法に関する。   The present invention relates to a method for manufacturing a battery in which a plurality of unsealed batteries that are alternately stacked and constrained via intervening members are heated, and the inside of each heated battery is decompressed and dried.

リチウムイオン二次電池などの電池を製造するにあたり、電解液を注液するのに先だって、電極体の内部に残った水分を除去したいなど、電池の内部を乾燥させたい場合がある。この乾燥は、例えば次のようにして行う。即ち、複数の未封口の電池と複数の介在部材とを交互に積層し積層方向に拘束する。その後、これらをヒータの平面状の加熱面上に、介在部材の平面状の部材底面が加熱面に当接するようにして載置する。その後、加熱面を介してヒータで各々の介在部材の部材底面を加熱し、介在部材及び電池をそれぞれ昇温させる。そして、昇温した各々の電池の内部を減圧して、電池の内部をそれぞれ乾燥させる。例えば特許文献１に、このようにして電池の内部を乾燥させる方法が開示されている。   In manufacturing a battery such as a lithium ion secondary battery, there are cases where it is desired to dry the inside of the battery, for example, to remove water remaining inside the electrode body before injecting the electrolyte. This drying is performed as follows, for example. That is, a plurality of unsealed batteries and a plurality of interposition members are alternately stacked and restrained in the stacking direction. Then, these are mounted on the planar heating surface of the heater so that the planar member bottom surface of the interposition member is in contact with the heating surface. Then, the member bottom surface of each interposed member is heated with a heater through the heating surface, and the interposed member and the battery are heated. Then, the inside of each battery that has been heated is decompressed, and the inside of each battery is dried. For example, Patent Document 1 discloses a method for drying the inside of a battery in this way.

特開２０１４−２３２６６５号公報JP 2014-232665 A

しかしながら、ヒータの加熱面は、熱により変形するので、完全に平坦ではない。加えて、複数の電池及び複数の介在部材を拘束する際に、各々の介在部材の部材底面を同じ高さに揃えることは困難であるため、各々の部材底面の高さ位置にバラツキが生じる。このため、介在部材の部材底面が加熱面に当接するように、拘束した複数の電池及び複数の介在部材を加熱面上に載置しても、加熱面と部材底面との間には、何処かで隙間が生じる。加熱面と部材底面との間に隙間が生じると、熱が加熱面から部材底面に伝わり難くなり、電池毎の昇温速度が不均一になるため、電池の昇温に時間を掛ける必要が生じ、昇温工程の時間が長くなる。   However, the heating surface of the heater is not completely flat because it is deformed by heat. In addition, when constraining a plurality of batteries and a plurality of interposition members, it is difficult to align the bottom surfaces of the interposition members at the same height, and therefore variations occur in the height positions of the bottom surfaces of the respective members. For this reason, even if a plurality of constrained batteries and a plurality of interposed members are placed on the heating surface so that the member bottom surface of the interposed member is in contact with the heating surface, there is no place between the heating surface and the member bottom surface. A gap occurs. If there is a gap between the heating surface and the bottom of the member, it will be difficult for heat to be transferred from the heating surface to the bottom of the member, and the rate of temperature rise for each battery will be uneven. , The time of the temperature raising process becomes longer.

本発明は、かかる現状に鑑みてなされたものであって、介在部材を介して交互に複数積層し拘束した未封口の電池を昇温させる昇温工程に掛ける時間を短くできる電池の製造方法を提供することを目的とする。   The present invention has been made in view of the present situation, and provides a battery manufacturing method capable of shortening the time required for the temperature raising step of raising the temperature of an unsealed battery that is alternately stacked and constrained via intervening members. The purpose is to provide.

上記課題を解決するための本発明の一態様は、複数の未封口の電池と複数の介在部材とを交互に積層し積層方向に拘束した拘束体を、複数の吸引孔が開口した平面状の加熱面を有するヒータの上記加熱面上に、各々の上記電池の電池底面が上記吸引孔上にそれぞれ位置し、かつ、上記介在部材の平面状の部材底面が上記加熱面に当接する形態に載置する載置工程と、各々の上記吸引孔を通じて上記加熱面と上記電池底面との間の気体を吸引し、上記加熱面と上記部材底面との間に生じている隙間にも上記気体を流通させつつ、上記加熱面を介して上記ヒータで各々の上記部材底面を加熱し、上記介在部材及び上記電池をそれぞれ昇温させる昇温工程と、昇温した各々の上記電池の内部を減圧して、上記電池の内部をそれぞれ乾燥させる減圧乾燥工程と、を備える電池の製造方法である。   In one embodiment of the present invention for solving the above-described problem, a restraint body in which a plurality of unsealed batteries and a plurality of interposition members are alternately stacked and restrained in the stacking direction is formed into a planar shape having a plurality of suction holes opened. The battery bottom surface of each battery is positioned on the suction hole on the heating surface of the heater having a heating surface, and the planar member bottom surface of the interposition member is in contact with the heating surface. And placing the gas between the heating surface and the bottom surface of the battery through each of the suction holes, and circulating the gas also into a gap formed between the heating surface and the bottom surface of the member While heating the bottom surface of each member with the heater through the heating surface, and increasing the temperature of the interposed member and the battery, respectively, and reducing the pressure inside the heated battery , Vacuum drying to dry the inside of each battery A step, a method for producing a battery comprising a.

上述の電池の製造方法によれば、加熱面を介してヒータで介在部材の部材底面を加熱し、介在部材及び電池を昇温させるのに際し、加熱面に開口した吸引孔を通じて、加熱面と電池底面との間の大気等の気体を吸引し、加熱面と部材底面との間に生じている隙間にも気体を流通させる。このようにすると、加熱面と部材底面との隙間に気体を流通させない場合に比べて、加熱面から部材底面に熱が伝わり易くなる。よって、電池毎の昇温速度が不均一になるのを抑制できるので、昇温工程に掛ける時間を短くできる。   According to the battery manufacturing method described above, when the temperature of the interposed member and the battery is increased by heating the bottom surface of the interposed member with the heater through the heating surface, the heating surface and the battery are passed through the suction holes opened in the heating surface. A gas such as the atmosphere between the bottom surface is sucked and the gas is also circulated through a gap formed between the heating surface and the member bottom surface. If it does in this way, compared with the case where gas is not distribute | circulated through the clearance gap between a heating surface and a member bottom face, it will become easy to transmit heat from a heating surface to a member bottom face. Therefore, since it can suppress that the temperature increase rate for every battery becomes non-uniform | heterogenous, the time taken for a temperature rising process can be shortened.

更に、上記の電池の製造方法であって、前記電池は、前記電池底面とは逆側に位置する電池上面に、電池内外を連通する未封口の連通孔が開口してなり、前記昇温工程は、前記吸引孔を通じて吸引した前記気体を、前記介在部材の前記部材底面のうち、前記積層方向に直交する幅方向の端縁に向けて供給し、上記気体を循環させつつ行う電池の製造方法とするのが好ましい。   Furthermore, in the battery manufacturing method described above, the battery has an unsealed communication hole communicating with the inside and outside of the battery on the battery upper surface located on the opposite side of the battery bottom surface, and the temperature raising step Supplies the gas sucked through the suction hole toward the edge in the width direction perpendicular to the stacking direction of the bottom surface of the interposition member, and the battery manufacturing method is performed while circulating the gas Is preferable.

上述の電池の製造方法によれば、吸引孔を通じて吸引した気体を、介在部材の部材底面のうち幅方向の端縁に向けて供給し、気体を循環させつつ昇温工程を行う。このため、気体の吸引に伴う気流が電池上面に開口した連通孔付近も通る形で生じるのを抑制し、この気流によって運ばれた埃などの異物が連通孔を通じて電池内部に混入するのを抑制できる。   According to the above-described battery manufacturing method, the gas sucked through the suction holes is supplied toward the edge in the width direction of the bottom surface of the interposed member, and the temperature raising step is performed while circulating the gas. For this reason, the air flow accompanying the suction of gas is prevented from passing in the vicinity of the communication hole opened on the upper surface of the battery, and foreign matter such as dust carried by this air current is prevented from entering the battery through the communication hole. it can.

実施形態に係る電池の斜視図である。It is a perspective view of the battery which concerns on embodiment. 実施形態に係る電池を電池厚み方向に直交する（電池横方向及び電池縦方向に沿う）平面で切断した電池の縦断面図である。It is the longitudinal cross-sectional view of the battery which cut | disconnected the battery which concerns on embodiment at the plane orthogonal to a battery thickness direction (along a battery horizontal direction and a battery vertical direction). 実施形態に係り、電池拘束装置で複数の電池を介在部材を介して積層し拘束した拘束体の斜視図である。It is a perspective view of the restraint body which concerns on embodiment and laminated | stacked and restrained the some battery via the interposition member with the battery restraint apparatus. 実施形態に係り、電池及び電池拘束装置からなる拘束体を内部に収容した電池乾燥装置を、拘束体の幅方向から見た説明図である。It is explanatory drawing which looked at the battery drying apparatus which accommodated the restraint body which consists of a battery and a battery restraint apparatus inside from the width direction of a restraint body concerning embodiment. 実施形態に係り、電池及び電池拘束装置からなる拘束体を内部に収容した電池乾燥装置を、拘束体の積層方向から見た説明図である。It is explanatory drawing which looked at the battery drying apparatus which accommodated the restraint body which consists of a battery and a battery restraint apparatus inside from the lamination direction of the restraint body in connection with embodiment. 実施形態に係り、積層された電池及び介在部材をプレートヒータの加熱面上に載置した状態を示す説明図である。It is explanatory drawing which shows the state which concerns on embodiment and the laminated | stacked battery and the interposed member were mounted on the heating surface of a plate heater.

以下、本発明の実施の形態を、図面を参照しつつ説明する。図１及び図２に、本実施形態に係る電池１の斜視図及び縦断面図を示す。なお、以下では、電池１の電池厚み方向ＢＨ、電池横方向ＣＨ及び電池縦方向ＤＨを、図１及び図２に示す方向と定めて説明する。
この電池１は、ハイブリッド自動車や電気自動車等の車両などに搭載される角型で密閉型のリチウムイオン二次電池である。電池１は、電池ケース１０と、この内部に収容された電極体２０と、電池ケース１０に支持された正極端子部材５０及び負極端子部材６０等から構成される。また、電池ケース１０内には、電解液１７が収容されており、その一部は電極体２０内に含浸されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a perspective view and a longitudinal sectional view of a battery 1 according to this embodiment. In the following description, the battery thickness direction BH, the battery lateral direction CH, and the battery vertical direction DH of the battery 1 are defined as the directions shown in FIGS. 1 and 2.
The battery 1 is a rectangular and sealed lithium ion secondary battery mounted on a vehicle such as a hybrid vehicle or an electric vehicle. The battery 1 includes a battery case 10, an electrode body 20 accommodated therein, a positive terminal member 50 and a negative terminal member 60 supported by the battery case 10, and the like. In addition, an electrolytic solution 17 is accommodated in the battery case 10, and a part thereof is impregnated in the electrode body 20.

このうち電池ケース１０は、各々平面状をなす、電池上面１０ａ（図１及び図２中、上方）と、これとは逆側に位置する電池底面１０ｂ（図１及び図２中、下方）と、これらの間を結ぶ４つの電池側面（電池横方向ＣＨに延びる一対の第１電池側面１０ｃ，１０ｃ及び電池厚み方向ＢＨに延びる一対の第２電池側面１０ｄ，１０ｄ）を有する直方体箱状で金属（本実施形態ではアルミニウム）からなる。電池ケース１０は、上側のみが開口した有底角筒状のケース本体部材１１と、このケース本体部材１１の開口１１ｈを閉塞する形態で溶接された矩形板状のケース蓋部材１３とから構成される。ケース蓋部材１３には、電池ケース１０の内圧が所定圧力に達した際に破断開弁する安全弁１４が設けられている。また、このケース蓋部材１３には、電池ケース１０の内外を連通する注液孔（連通孔）１３ｈが形成され、封止部材１５で気密に封止されている。この注液孔１３ｈは、電池１（電池ケース１０）の内部に電解液１７を注液する際に用いられるほか、電池１の内部を乾燥させる（電池１の内部に残った水分を電池１の外部に放出する）際に用いられる。   Of these, the battery case 10 has a flat battery upper surface 10a (upward in FIGS. 1 and 2) and a battery bottom surface 10b (downward in FIGS. 1 and 2) located on the opposite side thereof. , A rectangular parallelepiped box-shaped metal having four battery side faces (a pair of first battery side faces 10c, 10c extending in the battery lateral direction CH and a pair of second battery side faces 10d, 10d extending in the battery thickness direction BH) connecting them. (In this embodiment, aluminum). The battery case 10 is composed of a bottomed rectangular tube-shaped case main body member 11 that is open only on the upper side, and a rectangular plate-shaped case cover member 13 that is welded so as to close the opening 11h of the case main body member 11. The The case lid member 13 is provided with a safety valve 14 that opens when the internal pressure of the battery case 10 reaches a predetermined pressure. The case lid member 13 is formed with a liquid injection hole (communication hole) 13 h that communicates the inside and outside of the battery case 10, and is hermetically sealed with a sealing member 15. The liquid injection hole 13h is used when the electrolytic solution 17 is injected into the battery 1 (battery case 10), and also the interior of the battery 1 is dried (water remaining in the battery 1 is removed from the battery 1). Used when discharging to the outside).

また、ケース蓋部材１３には、アルミニウムからなる内部端子部材５３、外部端子部材５４及びボルト５５により構成される正極端子部材５０が、樹脂からなる内部絶縁部材５７及び外部絶縁部材５８を介して固設されている。この正極端子部材５０の一端は、電池ケース１０内において、後述する電極体２０のうち正極板２１の正極露出部２１ｍに接続し導通しており、正極端子部材５０の他端は、ケース蓋部材１３を貫通して電池外部まで延び、電池１の正極端子を構成している。
また、ケース蓋部材１３には、銅からなる内部端子部材６３、外部端子部材６４及びボルト６５により構成される負極端子部材６０が、樹脂からなる内部絶縁部材６７及び外部絶縁部材６８を介して固設されている。この負極端子部材６０の一端は、電池ケース１０内において、後述する電極体２０のうち負極板３１の負極露出部３１ｍに接続し導通しており、負極端子部材６０の他端は、ケース蓋部材１３を貫通して電池外部まで延び、電池１の負極端子を構成している。 Further, the case cover member 13 has a positive terminal member 50 composed of an internal terminal member 53 made of aluminum, an external terminal member 54 and a bolt 55 fixed via an internal insulating member 57 and an external insulating member 58 made of resin. It is installed. One end of the positive electrode terminal member 50 is connected to the positive electrode exposed portion 21m of the positive electrode plate 21 in the electrode body 20 to be described later in the battery case 10, and the other end of the positive electrode terminal member 50 is connected to the case lid member. 13 extends to the outside of the battery and constitutes the positive terminal of the battery 1.
Further, the case lid member 13 has a negative terminal member 60 composed of an internal terminal member 63 made of copper, an external terminal member 64 and a bolt 65 fixed through an internal insulating member 67 and an external insulating member 68 made of resin. It is installed. In the battery case 10, one end of the negative electrode terminal member 60 is connected to the negative electrode exposed portion 31m of the negative electrode plate 31 in the electrode body 20 described later, and the other end of the negative electrode terminal member 60 is connected to the case lid member. 13 extends to the outside of the battery and constitutes the negative terminal of the battery 1.

電極体２０は、帯状の正極板２１と帯状の負極板３１とを、一対の帯状で樹脂製のセパレータ４１，４１を介して互いに重ね、軸線周りに捲回して扁平状に圧縮したものである。電極体２０は、横倒しにした状態で電池ケース１０内に収容されている。電極体２０の軸線方向の一方側（図２中、左方）には、正極板２１のうち、正極集電箔２２が厚み方向に露出した正極露出部２１ｍが、渦巻き状をなして突出しており、前述の正極端子部材５０がこの正極露出部２１ｍに溶接されている。また、電極体２０の軸線方向の一方側（図２中、左方）には、負極板３１のうち、負極集電箔３２が厚み方向に露出した負極露出部３１ｍが、渦巻き状をなして突出しており、前述の負極端子部材６０がこの負極露出部３１ｍに溶接されている。   In the electrode body 20, a belt-like positive electrode plate 21 and a belt-like negative electrode plate 31 are overlapped with each other via a pair of belt-like resin separators 41, 41, wound around an axis, and compressed into a flat shape. . The electrode body 20 is accommodated in the battery case 10 in a laid state. On one side (left side in FIG. 2) of the electrode body 20 in the axial direction, a positive electrode exposed portion 21m of the positive electrode plate 21 in which the positive electrode current collector foil 22 is exposed in the thickness direction protrudes in a spiral shape. The positive electrode terminal member 50 is welded to the positive electrode exposed portion 21m. Also, on one side (left side in FIG. 2) of the electrode body 20 in the axial direction, a negative electrode exposed portion 31m of the negative electrode plate 31 in which the negative electrode current collector foil 32 is exposed in the thickness direction forms a spiral shape. The negative electrode terminal member 60 described above is welded to the negative electrode exposed portion 31m.

次いで、上記電池１の製造方法について説明する（図３〜図６参照）。まず、「電極体形成工程」において、正極板２１及び負極板３１を、一対のセパレータ４１，４１を介して互いに重ね、巻き芯を用いて軸線周りに捲回する。その後、これを扁平状に圧縮して扁平状捲回型の電極体２０を形成する。次に、「電池組立工程」において、ケース蓋部材１３、内部端子部材５３，６３、外部端子部材５４，６４、ボルト５５，６５、内部絶縁部材５７，６７を用いて、ケース蓋部材１３に正極端子部材５０及び負極端子部材６０をそれぞれ固設する（図１及び図２参照）。更に、正極端子部材５０及び負極端子部材６０を電極体２０にそれぞれ溶接する。その後、この電極体２０をケース本体部材１１内に挿入すると共に、ケース本体部材１１の開口１１ｈをケース蓋部材１３で塞ぐ。そして、ケース本体部材１１とケース蓋部材１３とを溶接する。これにより、注液孔１３ｈで内外が連通した未封口の電池１ｘができる。   Next, a method for manufacturing the battery 1 will be described (see FIGS. 3 to 6). First, in the “electrode body forming step”, the positive electrode plate 21 and the negative electrode plate 31 are overlapped with each other via a pair of separators 41 and 41 and wound around an axis line using a winding core. Thereafter, this is compressed into a flat shape to form a flat wound electrode body 20. Next, in the “battery assembly process”, the case lid member 13, the internal terminal members 53 and 63, the external terminal members 54 and 64, the bolts 55 and 65, and the internal insulating members 57 and 67 are used to connect the positive electrode to the case lid member 13. The terminal member 50 and the negative electrode terminal member 60 are respectively fixed (see FIGS. 1 and 2). Furthermore, the positive electrode terminal member 50 and the negative electrode terminal member 60 are welded to the electrode body 20, respectively. Thereafter, the electrode body 20 is inserted into the case body member 11, and the opening 11 h of the case body member 11 is closed with the case lid member 13. Then, the case main body member 11 and the case lid member 13 are welded. Thereby, an unsealed battery 1x in which the inside and outside communicate with each other through the liquid injection hole 13h is formed.

次に、「拘束工程」において、この電池１ｘを複数積層し押圧しつつ拘束する。まず、この拘束工程で用いる電池拘束装置１００について説明する（図３及び図６参照）。この電池拘束装置１００は、複数の未封口の電池１ｘ同士の間にそれぞれ介在させる複数の介在部材１１０と、積層した複数の電池１ｘ及び介在部材１１０をその積層方向ＥＨの外側から押圧して拘束する拘束機構１２０と、積層した電池１ｘ及び介在部材１１０の周囲（四方）を囲む矩形枠状の枠部１３０とを備える。   Next, in the “restraining step”, a plurality of the batteries 1x are stacked and restrained while being pressed. First, the battery restraint device 100 used in this restraint process will be described (see FIGS. 3 and 6). This battery restraint device 100 is restrained by pressing a plurality of interposed members 110 interposed between a plurality of unsealed batteries 1x, and a plurality of stacked batteries 1x and interposed members 110 from the outside in the stacking direction EH. And a rectangular frame-shaped frame portion 130 that surrounds the periphery (four sides) of the stacked battery 1x and the interposed member 110.

このうち介在部材１１０は、アルミニウム合金からなり、横断面が逆Ｔ字状の形状を有する。この介在部材１１０は、高さ方向ＧＨに延びる介在部１１１と、この介在部１１１の高さ方向ＧＨの下側に位置する基部１１３と、介在部１１１から幅方向ＦＨ（積層方向ＥＨ及び高さ方向ＧＨに直交する方向）にそれぞれ突出する突出部１１５，１１５を有する。このうち介在部１１１は、積層方向ＥＨに列置した電池１ｘ同士の間に介在させる平板状の部位である。この介在部１１１は、積層方向ＥＨに直交し（幅方向ＦＨ及び高さ方向ＧＨに沿い）、電池１ｘの第１電池側面１０ｃにそれぞれ当接する平面状の一対の当接面１１１ｃ，１１１ｃを有する。また、基部１１３は、高さ方向ＧＨの上方を向き、電池１ｘの電池底面１０ｂに当接する上側当接面１１３ａと、高さ方向ＧＨの下方を向き、後述するプレートヒータ２１０の加熱面２１０ａに当接する平面状の部材底面１１３ｂとを有する。   Of these, the interposition member 110 is made of an aluminum alloy and has a reverse T-shaped cross section. The interposition member 110 includes an interposition portion 111 extending in the height direction GH, a base portion 113 positioned below the height direction GH of the interposition portion 111, and a width direction FH (stacking direction EH and height) from the interposition portion 111. Projecting portions 115 projecting in the direction orthogonal to the direction GH). Among these, the interposition part 111 is a flat part interposed between the batteries 1x arranged in the stacking direction EH. The interposition part 111 has a pair of flat contact surfaces 111c and 111c that are orthogonal to the stacking direction EH (along the width direction FH and the height direction GH) and contact the first battery side surface 10c of the battery 1x. . The base 113 faces upward in the height direction GH, faces the upper contact surface 113a that contacts the battery bottom surface 10b of the battery 1x, and faces downward in the height direction GH to the heating surface 210a of the plate heater 210 described later. And a planar member bottom surface 113b that abuts.

拘束機構１２０は、矩形板状の第１エンドプレート１２１及び第２エンドプレート１２２と、ストッパボルト１２３とからなる。このうち第１エンドプレート１２１は、積層した電池１ｘ及び介在部材１１０よりも積層方向ＥＨの一方側（図３中、右下側）で、後述する枠部１３０の第１壁部１３１よりも積層方向ＥＨの他方側に配置される。一方、第２エンドプレート１２２は、積層した電池１ｘ及び介在部材１１０よりも積層方向ＥＨの他方側（図３中、左上側）で、枠部１３０の第２壁部１３２よりも積層方向ＥＨの一方側に配置される。また、ストッパボルト１２３は、周囲に台形ねじが形成され、枠部１３０の第１壁部１３１を貫通、螺合する。   The restraining mechanism 120 includes a rectangular plate-shaped first end plate 121 and second end plate 122, and a stopper bolt 123. Of these, the first end plate 121 is laminated on the one side (lower right side in FIG. 3) in the laminating direction EH from the laminated battery 1x and the interposition member 110, rather than the first wall 131 of the frame 130 described later. Arranged on the other side of the direction EH. On the other hand, the second end plate 122 is on the other side in the stacking direction EH than the stacked battery 1x and the interposition member 110 (on the upper left side in FIG. 3), and in the stacking direction EH than the second wall 132 of the frame 130. Arranged on one side. Further, the stopper bolt 123 is formed with a trapezoidal screw at the periphery, and penetrates and is screwed into the first wall 131 of the frame portion 130.

ストッパボルト１２３を正転させると、その先端部１２３ｔが積層方向ＥＨの他方側に移動して第１エンドプレート１２１を積層方向ＥＨの他方側に移動させる。これにより、第１エンドプレート１２１と第２エンドプレート１２２との間で、電池１ｘ及び介在部材１１０を積層方向ＥＨに押圧して拘束できる。更に、この押圧した状態でストッパボルト１２３の正転を止め、後述する枠部１３０の第１壁部１３１にストッパボルト１２３を固定すると、第１エンドプレート１２１の積層方向ＥＨの位置を固定でき、第１エンドプレート１２１及び第２エンドプレート１２２で、電池１ｘ及び介在部材１１０を押圧して拘束し続けることができる。   When the stopper bolt 123 is rotated forward, the tip end portion 123t moves to the other side in the stacking direction EH, and the first end plate 121 moves to the other side in the stacking direction EH. Accordingly, the battery 1x and the interposition member 110 can be pressed and restrained between the first end plate 121 and the second end plate 122 in the stacking direction EH. Further, when the stopper bolt 123 stops normal rotation in this pressed state and the stopper bolt 123 is fixed to the first wall 131 of the frame portion 130 to be described later, the position of the first end plate 121 in the stacking direction EH can be fixed, The first end plate 121 and the second end plate 122 can press and restrain the battery 1x and the interposition member 110.

枠部１３０は、矩形板状の第１壁部１３１及び第２壁部１３２と、矩形帯板状の第１連結板部１３５及び第２連結板部１３６とからなる。このうち第１壁部１３１は、前述のように、拘束機構１２０の第１エンドプレート１２１よりも積層方向ＥＨの一方側に位置し、第１壁部１３１の中央には、ストッパボルト１２３が貫通している。一方、第２壁部１３２は、拘束機構１２０の第２エンドプレート１２２よりも積層方向ＥＨの他方側に位置し、第２エンドプレート１２２に当接している。また、第１連結板部１３５及び第２連結板部１３６は、第１壁部１３１と第２壁部１３２との間を結ぶ。これら第１連結板部１３５及び第２連結板部１３６には、各々の介在部材１１０の突出部１１５が高さ方向ＧＨの上方からそれぞれ係合する。   The frame portion 130 includes a rectangular plate-shaped first wall portion 131 and a second wall portion 132, and a rectangular band plate-shaped first connecting plate portion 135 and a second connecting plate portion 136. Of these, the first wall 131 is located on one side in the stacking direction EH with respect to the first end plate 121 of the restraining mechanism 120 as described above, and the stopper bolt 123 passes through the center of the first wall 131. doing. On the other hand, the second wall portion 132 is located on the other side in the stacking direction EH with respect to the second end plate 122 of the restraining mechanism 120 and is in contact with the second end plate 122. Further, the first connecting plate part 135 and the second connecting plate part 136 connect the first wall part 131 and the second wall part 132. The first connecting plate portion 135 and the second connecting plate portion 136 are engaged with the protruding portions 115 of the respective interposing members 110 from above in the height direction GH.

次に、この電池拘束装置１００を用いた「拘束工程」について説明する。まず、複数の電池１ｘを、電池厚み方向ＢＨに重なるように、電池拘束装置１００の枠部１３０の内側に配置する。また、複数の介在部材１１０を、電池１ｘ同士の間、電池１ｘと第１エンドプレート１２１との間、及び、電池１ｘと第２エンドプレート１２２との間にそれぞれ介在させる。その後、拘束機構１２０を用いて、電池１ｘ及び介在部材１１０を積層方向ＥＨに押圧しつつ拘束する。   Next, a “restraint process” using the battery restraint device 100 will be described. First, the plurality of batteries 1x are arranged inside the frame portion 130 of the battery restraint device 100 so as to overlap with the battery thickness direction BH. Further, a plurality of interposition members 110 are interposed between the batteries 1x, between the battery 1x and the first end plate 121, and between the battery 1x and the second end plate 122, respectively. Thereafter, the restraining mechanism 120 is used to restrain the battery 1x and the interposition member 110 while pressing them in the stacking direction EH.

具体的には、ストッパボルト１２３を正転させて、ストッパボルト１２３の先端部１２３ｔを第１エンドプレート１２１に当接させ、第１エンドプレート１２１を積層方向ＥＨの他方側に移動させて、第１エンドプレート１２１と第２エンドプレート１２２との間で、電池１ｘ及び介在部材１１０を積層方向ＥＨに押圧する。そして、この状態でストッパボルト１２３を第１壁部１３１に固定する。これにより、各々の電池１ｘの第１電池側面１０ｃ，１０ｃは、それぞれ介在部材１１０の当接面１１１ｃ，１１１ｃに当接すると共に、電池底面１０ｂは、介在部材１１０の上側当接面１１３ａに当接する。かくして、複数の電池１ｘと複数の介在部材１１０とを交互に積層し積層方向ＥＨに拘束した拘束体１５０が形成される。
なお、複数の電池１ｘ及び複数の介在部材１１０を拘束する際に、各々の介在部材１１０の部材底面１１３ｂを同じ高さに揃えることは困難である。このため、図６に示すように、各々の部材底面１１３ｂの高さ位置にバラツキが生じる。 Specifically, the stopper bolt 123 is rotated forward, the tip end 123t of the stopper bolt 123 is brought into contact with the first end plate 121, and the first end plate 121 is moved to the other side in the stacking direction EH. Between the first end plate 121 and the second end plate 122, the battery 1x and the interposed member 110 are pressed in the stacking direction EH. In this state, the stopper bolt 123 is fixed to the first wall 131. Thus, the first battery side surfaces 10c and 10c of each battery 1x are in contact with the contact surfaces 111c and 111c of the interposition member 110, respectively, and the battery bottom surface 10b is in contact with the upper contact surface 113a of the interposition member 110. . Thus, a restraint body 150 is formed in which a plurality of batteries 1x and a plurality of interposition members 110 are alternately stacked and restrained in the stacking direction EH.
When restraining the plurality of batteries 1x and the plurality of interposition members 110, it is difficult to align the member bottom surfaces 113b of the interposition members 110 at the same height. For this reason, as shown in FIG. 6, variation arises in the height position of each member bottom face 113b.

次に、この複数の電池１ｘ及び電池拘束装置１００からなる拘束体１５０について、「載置工程」、「昇温工程」及び「減圧乾燥工程」を行い、各々の電池１ｘの内部を乾燥させる。まず、これらの工程で用いる電池乾燥装置２００について説明する（図４〜図６参照）。この電池乾燥装置２００は、プレートヒータ（ヒータ）２１０、減圧室２２０、真空ポンプ２３０、送風機２４０等から構成される。   Next, with respect to the restraint body 150 including the plurality of batteries 1x and the battery restraint device 100, the “placement process”, “temperature raising process”, and “reduced pressure drying process” are performed to dry the inside of each battery 1x. First, the battery drying apparatus 200 used in these steps will be described (see FIGS. 4 to 6). The battery drying apparatus 200 includes a plate heater (heater) 210, a decompression chamber 220, a vacuum pump 230, a blower 240, and the like.

このうちプレートヒータ２１０は、矩形平板状であり、拘束体１５０を載置する平面状の加熱面２１０ａを有する。プレートヒータ２１０の内部には、図４及び図５において破線で示すように、通電により発熱する矩形平板状の電熱体２１１が配置されており、この電熱体２１１からは図示しない電源に接続するリード線２１３が延出している。また、このプレートヒータ２１０には、加熱面２１０ａと、加熱面２１０ａの逆側に位置する裏面２１０ｂとの間を貫通する吸引孔２１０ｈが複数設けられている。これらの吸引孔２１０ｈは、後述するように、拘束体１５０を加熱面２１０ａ上の所定位置に載置した状態で、各々の電池１ｘの電池底面１０ｂの下方にそれぞれ位置する。   Among these, the plate heater 210 has a rectangular flat plate shape, and has a flat heating surface 210 a on which the restraining body 150 is placed. As shown by broken lines in FIGS. 4 and 5, a rectangular flat plate-like electric heating element 211 that generates heat when energized is disposed inside the plate heater 210, and leads connected to a power source (not shown) from the electric heating element 211. Line 213 extends. The plate heater 210 is provided with a plurality of suction holes 210h penetrating between the heating surface 210a and the back surface 210b located on the opposite side of the heating surface 210a. As will be described later, these suction holes 210h are respectively positioned below the battery bottom surface 10b of each battery 1x in a state where the restraining body 150 is placed at a predetermined position on the heating surface 210a.

減圧室２２０は、プレートヒータ２１０及びこの上に載置した拘束体１５０を内部に収容する。この減圧室２２０は、上壁部２２０ａ（図４中、上方）と、これに対向する底壁部２２０ｂ（図４及び図５中、下方）と、これらの間を結ぶ４つの側壁部（一対の第１側壁部２２０ｃ，２２０ｃ及び一対の第２側壁部２２０ｄ，２２０ｄ）を有する直方体箱状をなす。拘束体１５０を内部に収容した状態で、第１側壁部２２０ｃ，２２０ｃは、拘束体１５０の積層方向ＥＨと平行に位置し、第２側壁部２２０ｄ，２２０ｄは、拘束体１５０の幅方向ＦＨと平行に位置する。   The decompression chamber 220 accommodates the plate heater 210 and the restraining body 150 placed thereon. The decompression chamber 220 includes an upper wall 220a (upper in FIG. 4), a bottom wall 220b (lower in FIGS. 4 and 5) opposite to the upper wall 220a, and four side walls (a pair) connecting them. The first side wall portions 220c and 220c and the pair of second side wall portions 220d and 220d) have a rectangular parallelepiped box shape. In a state where the restraint body 150 is housed inside, the first side wall portions 220c and 220c are positioned in parallel with the stacking direction EH of the restraint body 150, and the second side wall portions 220d and 220d are parallel to the width direction FH of the restraint body 150. Located in parallel.

底壁部２２０ｂには、この底壁部２２０ｂを貫通する底部貫通孔２２０ｈが複数設けられている。これらの底部貫通孔２２０ｈは、減圧室２２０内の所定位置にプレートヒータ２１０を設置した状態で、プレートヒータ２１０に設けられた複数の吸引孔２１０ｈとそれぞれ連通する。また、第１側壁部２２０ｃ，２２０ｃには、それぞれ、第１側壁部２２０ｃを貫通する側部貫通孔２２０ｋが複数設けられている（図５参照）。これらの側部貫通孔２２０ｋは、減圧室２２０内の所定位置に拘束体１５０を収容した状態で、電池１ｘの高さ方向ＧＨの中央よりも低い位置で、かつ、斜め下向きに所定角度でそれぞれ形成されている。
真空ポンプ２３０は、排気管２３１を通じて減圧室２２０内の空気（気体）ＡＲを減圧室２２０の外部へ排出し、減圧室２２０内を減圧する。 The bottom wall 220b is provided with a plurality of bottom through-holes 220h that penetrate the bottom wall 220b. These bottom through holes 220h communicate with a plurality of suction holes 210h provided in the plate heater 210 in a state where the plate heater 210 is installed at a predetermined position in the decompression chamber 220. Each of the first side wall portions 220c and 220c is provided with a plurality of side through holes 220k that penetrate the first side wall portion 220c (see FIG. 5). These side through-holes 220k are respectively located at a position lower than the center of the height direction GH of the battery 1x and at a predetermined angle obliquely downward in a state in which the restraining body 150 is accommodated at a predetermined position in the decompression chamber 220. Is formed.
The vacuum pump 230 discharges the air (gas) AR in the decompression chamber 220 to the outside of the decompression chamber 220 through the exhaust pipe 231 to decompress the inside of the decompression chamber 220.

送風機２４０は、吸引管２４１及び供給管２４３をそれぞれ介して減圧室２２０に接続されている。吸引管２４１は、減圧室２２０に設けられた複数の底部貫通孔２２０ｈにそれぞれ繋がり、供給管２４３は、減圧室２２０に設けられた複数の側部貫通孔２２０ｋにそれぞれ繋がっている。送風機２４０を作動させると、減圧室２２０内の空気ＡＲがプレートヒータ２１０の各々の吸引孔２１０ｈから吸引され、減圧室２２０の各々の底部貫通孔２２０ｈ及び吸引管２４１を通じて、図４及び図５中に矢印で示すように、送風機２４０に送風される。一方、送風機２４０から排出された空気ＡＲは、供給管２４３及び減圧室２２０の各々の側部貫通孔２２０ｋを通じて、減圧室２２０内に戻される。側部貫通孔２２０ｋは、前述のように、所定角度で斜め下向きに形成されているため、側部貫通孔２２０ｋから供給された空気ＡＲは、図５中に破線の矢印で示すように、介在部材１１０の部材底面１１３ｂのうち幅方向ＦＨの端縁１１３ｂｆに向けて供給される。   The blower 240 is connected to the decompression chamber 220 via a suction pipe 241 and a supply pipe 243, respectively. The suction pipe 241 is connected to a plurality of bottom through holes 220 h provided in the decompression chamber 220, and the supply pipe 243 is connected to a plurality of side through holes 220 k provided in the decompression chamber 220. When the blower 240 is operated, the air AR in the decompression chamber 220 is sucked from each suction hole 210h of the plate heater 210 and passes through the bottom through hole 220h and the suction pipe 241 of each decompression chamber 220 in FIGS. As shown by the arrows in FIG. On the other hand, the air AR discharged from the blower 240 is returned into the decompression chamber 220 through the side through holes 220k of the supply pipe 243 and the decompression chamber 220. Since the side through-hole 220k is formed obliquely downward at a predetermined angle as described above, the air AR supplied from the side through-hole 220k is intervened as indicated by a broken arrow in FIG. It is supplied toward the edge 113bf in the width direction FH of the member bottom surface 113b of the member 110.

次に、「載置工程」について説明する。この工程では、複数の電池１ｘ及び電池拘束装置１００からなる拘束体１５０を、電池乾燥装置２００の減圧室２２０内に入れて、プレートヒータ２１０の加熱面２１０ａ上の所定位置に載置する。具体的には、各々の電池１ｘの電池底面１０ｂがプレートヒータ２１０の吸引孔２１０ｈ上にそれぞれ位置し、かつ、介在部材１１０の部材底面１１３ｂが加熱面２１０ａに当接するように、拘束体１５０を加熱面２１０ａ上に載置する。このとき、前述のように、拘束体１５０を構成する各々の介在部材１１０の部材底面１１３ｂには、高さ位置にバラツキが生じているので、図６に示すように、加熱面２１０ａと部材底面１１３ｂとの間に隙間ＳＫが生じる。また、次述する昇温工程でプレートヒータ２１０に通電すると、加熱面２１０ａは熱により変形する。この変形によっても、加熱面２１０ａと部材底面１１３ｂとの間に隙間ＳＫが生じ得る。   Next, the “placement process” will be described. In this step, the restraint body 150 including the plurality of batteries 1x and the battery restraint device 100 is placed in the decompression chamber 220 of the battery drying device 200 and placed at a predetermined position on the heating surface 210a of the plate heater 210. Specifically, the restraining body 150 is arranged so that the battery bottom surface 10b of each battery 1x is positioned on the suction hole 210h of the plate heater 210 and the member bottom surface 113b of the interposition member 110 is in contact with the heating surface 210a. Place on heating surface 210a. At this time, as described above, the member bottom surface 113b of each interposed member 110 constituting the restraining body 150 has a variation in the height position, so that as shown in FIG. 6, the heating surface 210a and the member bottom surface A gap SK is formed between the terminal 113b and the base plate 113b. Further, when the plate heater 210 is energized in the temperature raising step described below, the heating surface 210a is deformed by heat. This deformation may also cause a gap SK between the heating surface 210a and the member bottom surface 113b.

次に、「昇温工程」を行う。即ち、加熱面２１０ａを介してプレートヒータ２１０で各々の介在部材１１０の部材底面１１３ｂを加熱し、介在部材１１０及び電池１ｘをそれぞれ昇温させる。具体的には、リード線２１３を通じて電熱体２１１に通電し発熱させて、加熱面２１０ａを介して介在部材１１０及び電池１ｘを、各々の電池１ｘが目標温度に到達するまで昇温させる。熱は、加熱面２１０ａから部材底面１１３ｂを通じて介在部材１１０に伝わる。更にこの熱は、介在部材１１０の基部１１３の上側当接面１１３ａが当接する電池底面１０ｂを通じて電池１ｘに伝わるほか、介在部１１１の当接面１１１ｃ，１１１ｃが圧接する第１電池側面１０ｃ，１０ｃを通じても電池１ｘに伝わる。このようにして、電池１ｘが加熱される。   Next, a “temperature raising step” is performed. That is, the member bottom surface 113b of each interposition member 110 is heated by the plate heater 210 via the heating surface 210a, and the interposition member 110 and the battery 1x are heated. Specifically, the electric heating element 211 is energized through the lead wire 213 to generate heat, and the interposed member 110 and the battery 1x are heated through the heating surface 210a until each battery 1x reaches the target temperature. Heat is transferred from the heating surface 210a to the interposition member 110 through the member bottom surface 113b. Further, this heat is transmitted to the battery 1x through the battery bottom surface 10b with which the upper contact surface 113a of the base portion 113 of the interposition member 110 contacts, and also the first battery side surfaces 10c, 10c with which the contact surfaces 111c, 111c of the interposition portion 111 press contact. Is transmitted to the battery 1x. In this way, the battery 1x is heated.

この昇温工程では、プレートヒータ２１０によって加熱を行うと共に、送風機２４０を作動させて、各々の吸引孔２１０ｈを通じて加熱面２１０ａと各々の電池１ｘの電池底面１０ｂとの間の空気ＡＲを吸引し、加熱面２１０ａと介在部材１１０の部材底面１１３ｂとの間に生じている隙間ＳＫにも空気ＡＲを流通させる。加熱面２１０ａと部材底面１１３ｂとの隙間ＳＫに空気ＡＲを流通させると、隙間ＳＫに空気ＡＲを流通させない場合に比べて、加熱面２１０ａから部材底面１１３ｂに熱が伝わり易くなる。よって、電池１ｘ毎の昇温速度が不均一になるのを抑制できるので、この昇温工程に掛ける時間を短くできる。   In this temperature raising step, heating is performed by the plate heater 210 and the blower 240 is operated to suck the air AR between the heating surface 210a and the battery bottom surface 10b of each battery 1x through each suction hole 210h. The air AR is also circulated through the gap SK generated between the heating surface 210a and the member bottom surface 113b of the interposed member 110. When the air AR is circulated through the gap SK between the heating surface 210a and the member bottom surface 113b, heat is more easily transmitted from the heating surface 210a to the member bottom surface 113b than when the air AR is not circulated through the gap SK. Therefore, since it can suppress that the temperature increase rate for every battery 1x becomes non-uniform | heterogenous, the time concerning this temperature rising process can be shortened.

一方で、各々の吸引孔２１０ｈから吸引した空気ＡＲを、減圧室２２０の複数の底部貫通孔２２０ｈ、吸引管２４１、送風機２４０、供給管２４３、及び、減圧室２２０の各々の側部貫通孔２２０ｋを通じて、減圧室２２０内に戻す。前述のように、側部貫通孔２２０ｋは、所定角度で斜め下向きに形成されているため、側部貫通孔２２０ｋから減圧室２２０内に供給された空気ＡＲは、各々の介在部材１１０の部材底面１１３ｂのうち幅方向ＦＨの端縁１１３ｂｆに向けて供給される。更にこの空気ＡＲは、加熱面２１０ａと部材底面１１３ｂとの間に生じている隙間ＳＫを通じて、加熱面２１０ａと電池１ｘの電池底面１０ｂとの間に供給され、再び吸引孔２１０ｈを通じて吸引される。吸引した空気ＡＲがこのように循環することで、空気ＡＲの吸引に伴う気流が電池上面１０ａに開口した注液孔１３ｈ付近も通る形で生じるのを抑制できるので、この気流によって運ばれた埃などの異物が注液孔１３ｈを通じて電池１ｘの内部に混入するのを抑制できる。   On the other hand, the air AR sucked from each suction hole 210h is supplied to the plurality of bottom through holes 220h of the decompression chamber 220, the suction pipe 241, the blower 240, the supply pipe 243, and the side through holes 220k of the decompression chamber 220. And return to the decompression chamber 220. As described above, since the side through holes 220k are formed obliquely downward at a predetermined angle, the air AR supplied from the side through holes 220k into the decompression chamber 220 is the bottom surface of each interposed member 110. It is supplied toward the edge 113bf in the width direction FH among 113b. Further, the air AR is supplied between the heating surface 210a and the battery bottom surface 10b of the battery 1x through the gap SK generated between the heating surface 210a and the member bottom surface 113b, and is sucked again through the suction hole 210h. Since the sucked air AR circulates in this way, it is possible to suppress the generation of the air flow accompanying the suction of the air AR in the form of passing through the vicinity of the liquid injection hole 13h opened in the battery upper surface 10a. Or the like can be prevented from entering the inside of the battery 1x through the liquid injection hole 13h.

次に、「減圧乾燥工程」を行う。即ち、昇温した各々の電池１ｘの内部を減圧して、電池１ｘの内部をそれぞれ乾燥させる。具体的には、真空ポンプ２３０を用いて、減圧室２２０内を真空状態（具体的には、室内の気圧が１ｋＰａ以下の状態）に減圧し、昇温した電池１ｘ内の水分を注液孔１３ｈを通じて外部に排出させ、電池１ｘの内部を乾燥させる。
次に、「注液工程」において、電解液１７を注液孔１３ｈから電池ケース１０内に注液して電極体２０内に含浸させる。その後、「封止工程」において、封止部材１５で注液孔１３ｈを封止する。その後は、この電池について初充電や各種検査を行う。かくして、電池１が完成する。 Next, a “reduced pressure drying step” is performed. That is, the inside of each battery 1x whose temperature has been increased is decompressed, and the inside of each battery 1x is dried. Specifically, using the vacuum pump 230, the inside of the decompression chamber 220 is decompressed to a vacuum state (specifically, the atmospheric pressure is 1 kPa or less), and the water in the battery 1x that has been heated is poured into the injection hole It is discharged to the outside through 13h, and the inside of the battery 1x is dried.
Next, in the “liquid injection process”, the electrolytic solution 17 is injected into the battery case 10 from the liquid injection hole 13 h and impregnated in the electrode body 20. Thereafter, in the “sealing step”, the liquid injection hole 13 h is sealed with the sealing member 15. Thereafter, the battery is first charged and various inspections are performed. Thus, the battery 1 is completed.

以上で説明したように、本実施形態の電池１の製造方法では、加熱面２１０ａを介してヒータ２１０で介在部材１１０の部材底面１１３ｂを加熱し、介在部材１１０及び電池１ｘを昇温させる昇温工程において、加熱面２１０ａに開口した吸引孔２１０ｈを通じて、加熱面２１０ａと電池１ｘの電池底面１０ｂとの間の空気ＡＲを吸引し、加熱面２１０ａと部材底面１１３ｂとの間に生じている隙間ＳＫにも空気ＡＲを流通させる。このようにすると、加熱面２１０ａと部材底面１１３ｂとの隙間ＳＫに空気ＡＲを流通させない場合に比べて、加熱面２１０ａから部材底面１１３ｂに熱が伝わり易くなる。よって、電池１ｘ毎の昇温速度が不均一になるのを抑制できるので、昇温工程に掛ける時間を短くできる。   As described above, in the battery 1 manufacturing method of the present embodiment, the member bottom surface 113b of the interposed member 110 is heated by the heater 210 via the heating surface 210a, and the temperature of the intermediate member 110 and the battery 1x is increased. In the process, air SK between the heating surface 210a and the battery bottom surface 10b of the battery 1x is sucked through the suction hole 210h opened in the heating surface 210a, and the gap SK generated between the heating surface 210a and the member bottom surface 113b. Air AR is also distributed. This makes it easier for heat to be transferred from the heating surface 210a to the member bottom surface 113b than when the air AR is not circulated through the gap SK between the heating surface 210a and the member bottom surface 113b. Therefore, since it can suppress that the temperature increase rate for every battery 1x becomes non-uniform | heterogenous, the time concerning a temperature rising process can be shortened.

更に本実施形態では、吸引孔２１０ｈを通じて吸引した空気ＡＲを、各々の介在部材１１０の部材底面１１３ｂのうち幅方向ＦＨの端縁１１３ｂｆに向けて供給し、空気ＡＲを循環させつつ行う。このため、空気ＡＲの吸引に伴う気流が電池上面１０ａに開口した注液孔１３ｈ付近も通る形で生じるのを抑制し、この気流によって運ばれた埃などの異物が注液孔１３ｈを通じて電池１ｘの内部に混入するのを抑制できる。よって、吸引した空気ＡＲに異物が混ざっている場合でも、この異物が注液孔１３ｈを通じて電池１ｘの内部に侵入するのを抑制できる。   Further, in the present embodiment, the air AR sucked through the suction holes 210h is supplied toward the edge 113bf in the width direction FH of the member bottom surfaces 113b of the respective interposing members 110, and the air AR is circulated. For this reason, the air flow accompanying the suction of the air AR is prevented from passing in the vicinity of the liquid injection hole 13h opened in the battery upper surface 10a, and foreign matter such as dust carried by the air flow passes through the liquid injection hole 13h. Can be prevented from being mixed in the inside. Therefore, even when foreign matter is mixed in the sucked air AR, the foreign matter can be prevented from entering the battery 1x through the liquid injection hole 13h.

以上において、本発明を実施形態に即して説明したが、本発明は上述の実施形態に限定されるものではなく、その要旨を逸脱しない範囲で、適宜変更して適用できることは言うまでもない。   In the above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof.

１ 電池
１ｘ （未封口の）電池
１０ 電池ケース
１０ａ 電池上面
１０ｂ 電池底面
１３ｈ 注液孔（連通孔）
２０ 電極体
５０ 正極端子部材
６０ 負極端子部材
１００ 電池拘束装置
１１０ 介在部材
１１３ 基部
１１３ｂ 部材底面
１１３ｂｆ （幅方向の）端縁
１２０ 拘束機構
１３０ 枠部
１５０ 拘束体
２００ 電池乾燥装置
２１０ プレートヒータ（ヒータ）
２１０ａ 加熱面
２１０ｈ 吸引孔
２２０ 減圧室
２３０ 真空ポンプ
２４０ 送風機
ＥＨ 積層方向
ＦＨ 幅方向
ＧＨ 高さ方向
ＡＲ 空気（気体） 1 battery 1x (unsealed) battery 10 battery case 10a battery top surface 10b battery bottom surface 13h injection hole (communication hole)
20 Electrode body 50 Positive electrode terminal member 60 Negative electrode terminal member 100 Battery restraint device 110 Interposition member 113 Base 113b Member bottom surface 113bf (Width direction) edge 120 Restraint mechanism 130 Frame portion 150 Restraint body 200 Battery drying device 210 Plate heater (heater)
210a Heating surface 210h Suction hole 220 Decompression chamber 230 Vacuum pump 240 Blower EH Stacking direction FH Width direction GH Height direction AR Air (gas)

Claims (1)

複数の未封口の電池と複数の介在部材とを交互に積層し積層方向に拘束した拘束体を、
複数の吸引孔が開口した平面状の加熱面を有するヒータの上記加熱面上に、
各々の上記電池の電池底面が上記吸引孔上にそれぞれ位置し、かつ、上記介在部材の平面状の部材底面が上記加熱面に当接する形態に載置する
載置工程と、
各々の上記吸引孔を通じて上記加熱面と上記電池底面との間の気体を吸引し、上記加熱面と上記部材底面との間に生じている隙間にも上記気体を流通させつつ、
上記加熱面を介して上記ヒータで各々の上記部材底面を加熱し、上記介在部材及び上記電池をそれぞれ昇温させる
昇温工程と、
昇温した各々の上記電池の内部を減圧して、上記電池の内部をそれぞれ乾燥させる減圧乾燥工程と、を備える
電池の製造方法。 A restraint body in which a plurality of unsealed batteries and a plurality of interposition members are alternately laminated and restrained in the stacking direction,
On the heating surface of the heater having a planar heating surface with a plurality of suction holes opened,
A mounting step in which the battery bottom surface of each of the batteries is positioned on the suction hole, and the planar member bottom surface of the interposition member is in contact with the heating surface; and
While sucking the gas between the heating surface and the battery bottom surface through each of the suction holes, while circulating the gas also in the gap formed between the heating surface and the member bottom surface,
A temperature raising step of heating the bottom surface of each member with the heater through the heating surface, and raising the temperature of the interposed member and the battery, respectively;
A reduced-pressure drying step of depressurizing the interior of each battery that has been heated to dry the interior of each of the batteries.
JP2015227998A 2015-11-20 2015-11-20 Manufacturing method of battery Pending JP2017098040A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018208600A1 (en) 2017-07-27 2019-01-31 Fanuc Corporation Robot control and production system
CN113258226A (en) * 2021-05-13 2021-08-13 深圳市世纪佳源电子科技有限公司 Sealed liquid injection device for lithium battery production and implementation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018208600A1 (en) 2017-07-27 2019-01-31 Fanuc Corporation Robot control and production system
CN113258226A (en) * 2021-05-13 2021-08-13 深圳市世纪佳源电子科技有限公司 Sealed liquid injection device for lithium battery production and implementation method thereof
CN113258226B (en) * 2021-05-13 2022-09-13 南驰能源科技(深圳)有限公司 Sealed liquid injection device for lithium battery production and implementation method thereof

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