JPH1131531A - Manufacture of nonaqueous electrolyte secondary battery - Google Patents
Manufacture of nonaqueous electrolyte secondary batteryInfo
- Publication number
- JPH1131531A JPH1131531A JP9186796A JP18679697A JPH1131531A JP H1131531 A JPH1131531 A JP H1131531A JP 9186796 A JP9186796 A JP 9186796A JP 18679697 A JP18679697 A JP 18679697A JP H1131531 A JPH1131531 A JP H1131531A
- Authority
- JP
- Japan
- Prior art keywords
- lithium
- battery
- negative electrode
- charging
- battery element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
-
- 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
Landscapes
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、非水電解質二次電
池の製造方法に関する。The present invention relates to a method for manufacturing a non-aqueous electrolyte secondary battery.
【０００２】[0002]
【従来の技術】非水電解質二次電池の負極は、一次電池
の場合と同様に金属リチウムを用いるのが理想である。
しかし、金属リチウムを負極に用いると、充電時に正極
から非水電解液に溶解したリチウムイオンが負極の表面
に樹枝状に結晶して析出し、セパレータを貫通して正極
との間に内部短絡を起こすおそれが生じる。そこで、微
細な層状等の構造を有するグラファイト等を負極として
用いて、非水電解液に溶解したリチウムイオンをインサ
ーションによってこの負極に取り込むことにより、充電
時に樹枝状結晶が析出することがないようにした非水電
解質二次電池が実用化されている。2. Description of the Related Art Ideally, a negative electrode of a nonaqueous electrolyte secondary battery uses metallic lithium as in the case of a primary battery.
However, when lithium metal is used for the negative electrode, lithium ions dissolved in the non-aqueous electrolyte from the positive electrode during charging will precipitate in a dendritic manner on the surface of the negative electrode, and penetrate through the separator to cause an internal short circuit with the positive electrode. May occur. Therefore, using graphite or the like having a fine layered structure as a negative electrode, lithium ions dissolved in a non-aqueous electrolyte are taken into the negative electrode by insertion so that dendritic crystals do not precipitate during charging. Non-aqueous electrolyte secondary batteries have been put to practical use.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記非水電
解質二次電池は、最初の充電時に正極のリチウムが負極
の表面で被膜となって消費されるので、その後の充放電
時の可逆反応で利用できるリチウムが減少し電池容量が
少なくなるという問題があった。例えば、正極にリチウ
ムコバルト複合酸化物を用い負極にグラファイトを用い
た電池の場合には、負極で１５％程度のリチウムが消費
されるので、正極のリチウムは、全体の８５％程度しか
充放電に利用することができない。また、最初の充電時
には、負極での表面反応によりガスが発生するので、特
に角形の電池ケースを用いる場合や柔軟なラミネートフ
ィルム等を電池ケースとして用いる場合には、このガス
を密封前に外部に放出しておかなければ、電池ケースが
ガス圧で膨らむという問題も生じていた。However, in the above non-aqueous electrolyte secondary battery, the lithium of the positive electrode is consumed as a film on the surface of the negative electrode at the time of the first charge. There is a problem that available lithium decreases and battery capacity decreases. For example, in the case of a battery using a lithium-cobalt composite oxide for the positive electrode and graphite for the negative electrode, about 15% of the lithium is consumed in the negative electrode, so that only about 85% of the lithium in the positive electrode is charged and discharged. Not available. Also, during the first charging, gas is generated by the surface reaction at the negative electrode, so when using a rectangular battery case or when using a flexible laminated film or the like as the battery case, this gas is externally sealed before sealing. If the battery case is not discharged, there has been a problem that the battery case expands due to gas pressure.
【０００４】本発明は、かかる事情に鑑みてなされたも
のであり、電池エレメントを電池ケースに組み込む前に
金属リチウムによる予備充電を行うことにより、正極の
リチウムを無駄なく充放電に利用できるようにし、ガス
が電池ケース内に溜まることもない非水電解質二次電池
の製造方法を提供することを目的としている。[0004] The present invention has been made in view of such circumstances, and performs pre-charging with metallic lithium before assembling a battery element into a battery case, so that lithium on the positive electrode can be used for charge and discharge without waste. It is another object of the present invention to provide a method for manufacturing a non-aqueous electrolyte secondary battery in which gas does not accumulate in a battery case.
【０００５】[0005]
【課題を解決するための手段】即ち、本発明は、上記課
題を解決するために、正負極をセパレータを介して重
ね合わせることにより電池エレメントを形成する電池エ
レメント形成工程と、この電池エレメントを金属リチウ
ムと共に非水電解液中に浸けて、この電池エレメントの
負極と金属リチウムとを電気的に接続し予備充電を行う
予備充電工程と、予備充電を終えた電池エレメントを電
池ケースに収納するケース収納工程とを備えたことを特
徴とする。That is, in order to solve the above-mentioned problems, the present invention provides a battery element forming step of forming a battery element by overlapping positive and negative electrodes via a separator; A pre-charging step of immersing the battery element in a non-aqueous electrolyte together with lithium to electrically connect the negative electrode of the battery element and metallic lithium to perform a pre-charge, and a case housing for storing the pre-charged battery element in a battery case And a process.
【０００６】の手段によれば、非水電解液中で電池エ
レメントの負極と金属リチウムとを電気的に接続するの
で、この金属リチウムからリチウムイオンが非水電解液
中に溶解して負極に移動し予備充電が行われる。従っ
て、この負極の表面反応で消費されるリチウムを事前に
金属リチウムから供給できるので、後の充放電時に正極
のリチウムが無駄なく利用できるようになる。また、電
池エレメントは、この予備充電の後に電池ケースに収納
されるので、負極の表面反応時に発生するガスが電池ケ
ース内に溜まるようなこともなくなる。According to the means, the negative electrode of the battery element and the metallic lithium are electrically connected in the non-aqueous electrolytic solution, so that lithium ions dissolve in the non-aqueous electrolytic solution from the metallic lithium and move to the negative electrode. Then, preliminary charging is performed. Therefore, lithium consumed in the surface reaction of the negative electrode can be supplied in advance from metallic lithium, so that lithium of the positive electrode can be used without waste at the time of subsequent charge and discharge. Further, since the battery element is stored in the battery case after the preliminary charging, gas generated during the surface reaction of the negative electrode does not accumulate in the battery case.
【０００７】なお、負極を単独で予備充電すると、表面
に形成される被膜によって負極活物質が膨張するので、
正極やセパレータと重ね合わせて巻回等を行うことがで
きなくなる。このため、本発明は、電池エレメントを形
成した後に、予備充電を行う必要が生じる。When the negative electrode is precharged alone, the negative electrode active material expands due to the film formed on the surface.
It becomes impossible to perform winding or the like by overlapping with the positive electrode or the separator. For this reason, according to the present invention, it is necessary to perform preliminary charging after forming the battery element.
【０００８】また、前記の予備充電工程が、電池エ
レメントの負極と金属リチウムとの間に電圧を印加する
ことにより予備充電を行う工程であることを特徴とす
る。[0008] Further, the precharging step is characterized in that the precharging is performed by applying a voltage between the negative electrode of the battery element and the metallic lithium.
【０００９】の手段によれば、非水電解液中で電池エ
レメントの負極と金属リチウムとの間に電圧を印加する
ので、予備充電を確実かつ迅速に行うことができるよう
になる。また、負極に表面反応のために供給するリチウ
ムの量は、多すぎてもよくないので、この印加電圧を適
当な定電圧に調整すれば、リチウムを自動的に適量だけ
供給することができるようになる。According to the means, since a voltage is applied between the negative electrode of the battery element and the metallic lithium in the non-aqueous electrolyte, the preliminary charging can be performed reliably and quickly. Also, the amount of lithium supplied to the negative electrode for the surface reaction may not be too large, so that by adjusting this applied voltage to an appropriate constant voltage, lithium can be automatically supplied in an appropriate amount. become.
【００１０】さらに、前記の予備充電工程が、減
圧した密閉容器内の非水電解液中で予備充電を行う工程
であることを特徴とする。Further, the pre-charging step is characterized in that the pre-charging step is a step of pre-charging in a non-aqueous electrolytic solution in a reduced-pressure closed container.
【００１１】の手段によれば、減圧した密閉容器内で
予備充電を行うので、負極で発生したガスが非水電解液
中に溶け込んだり電池エレメント内の電極間等に留まる
ようなことがなくなり、確実なガス抜きを行うことがで
きるようになる。According to the means, since the pre-charging is performed in the depressurized closed container, the gas generated at the negative electrode does not dissolve in the non-aqueous electrolytic solution or stays between the electrodes in the battery element. It is possible to perform reliable degassing.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施形態について
図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図１〜図４は本発明の一実施形態を示すも
のであって、図１は電池エレメントを形成する工程を示
す斜視図、図２は電池エレメントを仮ケースに収納する
工程を示す斜視図、図３は電池エレメントを予備充電す
る工程を示す斜視図、図４は電池エレメントを電池ケー
スに収納する工程を示す斜視図である。1 to 4 show one embodiment of the present invention. FIG. 1 is a perspective view showing a process of forming a battery element, and FIG. 2 shows a process of storing the battery element in a temporary case. FIG. 3 is a perspective view showing a step of pre-charging the battery element, and FIG. 4 is a perspective view showing a step of storing the battery element in the battery case.
【００１４】本実施形態では、巻回形の電池エレメント
１を用いた非水電解質二次電池の製造方法について説明
する。電池エレメント１は、図１に示すように、負極２
と正極３をセパレータ４を介して長円状に巻回すること
により形成される（電池エレメント形成工程）。この電
池エレメント１は、必要に応じて、巻きが解けないよう
にテープ等で止めておく。負極２は、帯状の銅箔の表面
にグラファイト等の負極活物質を塗布したものであり、
正極３は、帯状のアルミニウム箔の表面にリチウムコバ
ルト複合酸化物（ＬｉＣｏＯ2）等の正極活物質を塗布
したものである。ただし、負極２は、巻回した最外周部
の外向き面が負極活物質を塗布されずに銅箔を露出さ
せ、正極３は、巻回の後端部が正極活物質を塗布されず
にアルミニウム箔を露出させている。セパレータ４は、
帯状の微多孔性樹脂フィルムを用いる。In this embodiment, a method for manufacturing a non-aqueous electrolyte secondary battery using a wound battery element 1 will be described. As shown in FIG. 1, the battery element 1
And the positive electrode 3 are formed by winding them into an oval shape with the separator 4 interposed therebetween (a battery element forming step). If necessary, the battery element 1 is stopped with a tape or the like so as not to be unwound. The negative electrode 2 is obtained by applying a negative electrode active material such as graphite on the surface of a strip-shaped copper foil,
The positive electrode 3 is obtained by applying a positive electrode active material such as a lithium-cobalt composite oxide (LiCoO2) to the surface of a strip-shaped aluminum foil. However, in the negative electrode 2, the outermost surface of the wound outermost portion exposes the copper foil without applying the negative electrode active material, and the positive electrode 3 has the wound rear end portion coated with the positive electrode active material. The aluminum foil is exposed. The separator 4 is
A strip-shaped microporous resin film is used.
【００１５】上記電池エレメント１は、図２に示すよう
に、銅板のパンチングメタルを底のない箱状に形成した
仮ケース５に挿入される。電池エレメント１は、長円の
短径の幅よりもわずかに狭い仮ケース５内に押し込まれ
て、巻きの弾性によりこの仮ケース５内に保持される。
また、この仮ケース５の銅板には、電池エレメント１の
負極２の最外周部に露出した銅箔が圧接されるので、こ
れらの間が電気的に接続される。As shown in FIG. 2, the battery element 1 is inserted into a temporary case 5 in which a punched metal of a copper plate is formed in a box shape without a bottom. The battery element 1 is pushed into the temporary case 5 slightly smaller than the width of the minor axis of the ellipse, and is held in the temporary case 5 by the elasticity of the winding.
Further, the copper foil exposed at the outermost peripheral portion of the negative electrode 2 of the battery element 1 is pressed against the copper plate of the temporary case 5, so that the copper foil is electrically connected therebetween.
【００１６】仮ケース５に収納された電池エレメント１
は、図３に示すように、真空チャンバ６内に満たした非
水電解液７中に浸けられる。仮ケース５のパンチングの
孔は、この非水電解液７が電池エレメント１に流通し易
くするためのものである。真空チャンバ６は、上部のバ
ルブ８を介して、密閉した内部を真空引きし減圧するよ
うになっている。また、下部のバルブ９は、非水電解液
７の交換時に使用する。この真空チャンバ６内に満たさ
れた非水電解液７中には、金属リチウム１０も浸けられ
ている。そして、これら非水電解液７中の仮ケース５と
金属リチウム１０は、リード線を介して定電圧電源１１
に接続されている。定電圧電源１１は、仮ケース５を介
した電池エレメント１の負極２と金属リチウム１０との
間に０．６Ｖ程度の定電圧を印加する電源である。Battery element 1 stored in temporary case 5
Is immersed in a non-aqueous electrolyte 7 filled in a vacuum chamber 6 as shown in FIG. The punched holes in the temporary case 5 are for facilitating the flow of the nonaqueous electrolyte 7 to the battery element 1. The vacuum chamber 6 is configured to evacuate the inside of the hermetically sealed chamber via an upper valve 8 to reduce the pressure. The lower valve 9 is used when exchanging the non-aqueous electrolyte 7. The metal lithium 10 is also immersed in the non-aqueous electrolyte 7 filled in the vacuum chamber 6. Then, the temporary case 5 and the metallic lithium 10 in the non-aqueous electrolyte 7 are connected to a constant voltage power supply 11 via a lead wire.
It is connected to the. The constant voltage power supply 11 is a power supply that applies a constant voltage of about 0.6 V between the negative electrode 2 of the battery element 1 and the lithium metal 10 via the temporary case 5.
【００１７】定電圧電源１１が定電圧を印加すると、金
属リチウム１０からリチウムイオンが非水電解液７中に
溶解して負極２に移動し予備充電が行われる（予備充電
工程）。すると、負極２では、このリチウムイオンによ
って表面反応が発生し被膜が形成されてリチウムを消費
する。ただし、このようにして負極２がリチウムを取り
込むと、金属リチウム１０とのポテンシャルの差が減少
するので、予備充電が自動的に終了する。負極２の表面
反応のために供給するリチウムの量が多すぎると、後の
充電時にこの負極２に樹枝状結晶が析出するおそれが生
じるので、リチウムが適当な量だけ供給されるように定
電圧電源１１の定電圧を調整する。ただし、負極２への
リチウムの供給量は予め分かっているので、電流の積分
値（電荷量）が所定値を超えたら回路を遮断するように
したり、定電流を供給しておいて時間で制御するように
してもよい。また、このように供給するリチウムの量を
制御する場合には、電池エレメント１の負極２と金属リ
チウム１０とを単に電気的に接続するだけでもよい。When the constant voltage power supply 11 applies a constant voltage, lithium ions are dissolved from the metallic lithium 10 into the non-aqueous electrolyte 7 and moved to the negative electrode 2 to perform a preliminary charge (preliminary charge step). Then, in the negative electrode 2, a surface reaction occurs due to the lithium ions, a film is formed, and lithium is consumed. However, when the negative electrode 2 takes in lithium in this way, the difference in potential between the negative electrode 2 and the metal lithium 10 decreases, so that the preliminary charging automatically ends. If the amount of lithium supplied for the surface reaction of the negative electrode 2 is too large, a dendritic crystal may be deposited on the negative electrode 2 at the time of subsequent charging, so that a constant voltage is applied so that an appropriate amount of lithium is supplied. The constant voltage of the power supply 11 is adjusted. However, since the supply amount of lithium to the negative electrode 2 is known in advance, the circuit is shut off when the integrated value (charge amount) of the current exceeds a predetermined value, or a constant current is supplied to control the time. You may make it. When controlling the amount of lithium to be supplied in this way, the negative electrode 2 of the battery element 1 and the metallic lithium 10 may simply be electrically connected.
【００１８】上記予備充電の際には、負極２での表面反
応によりガスが発生する。ただし、そのままでは、この
ガスが非水電解液７から外部に全て放出されずに、非水
電解液７に溶け込んだり電池エレメント１の電極間等に
気泡となって留まるおそれがある。しかし、本実施形態
では、真空チャンバ６内を減圧しているので、ここで発
生したガスのほとんどを非水電解液７から外部に放出さ
せることができる。During the pre-charging, gas is generated by a surface reaction at the negative electrode 2. However, as it is, there is a possibility that the gas is not entirely released from the non-aqueous electrolyte 7 to the outside, but is dissolved in the non-aqueous electrolyte 7 or remains as a bubble between the electrodes of the battery element 1 or the like. However, in this embodiment, since the pressure in the vacuum chamber 6 is reduced, most of the gas generated here can be released from the non-aqueous electrolyte 7 to the outside.
【００１９】予備充電が完了すると、非水電解液７中か
ら仮ケース５を取り出し、振動を加える等して電池エレ
メント１に付着した非水電解液７を振り払う。そして、
図４に示すように、電池エレメント１を仮ケース５から
押し出すと共に、この電池エレメント１を実際の電池ケ
ース１２に収納する（ケース収納工程）。電池ケース１
２は、ステンレス鋼板等を箱状にしたものであり、電池
エレメント１の負極２の銅箔が圧接することにより負極
端子となる。また、電池エレメント１の正極３は、巻回
の後端部を図示しない電池蓋の正極端子に接続する。そ
して、この電池ケース１２に非水電解液を注入し、開口
部に電池蓋を嵌めてレーザ溶接により密閉することによ
り、角形の非水電解質二次電池が完成する。When the pre-charging is completed, the temporary case 5 is taken out of the non-aqueous electrolyte 7 and the non-aqueous electrolyte 7 attached to the battery element 1 is shaken off by applying vibration or the like. And
As shown in FIG. 4, the battery element 1 is pushed out of the temporary case 5, and the battery element 1 is stored in the actual battery case 12 (case storing step). Battery case 1
Numeral 2 is a box-shaped stainless steel plate or the like, which becomes a negative electrode terminal when the copper foil of the negative electrode 2 of the battery element 1 is pressed. The positive electrode 3 of the battery element 1 is connected at the rear end of the winding to a positive electrode terminal of a battery cover (not shown). Then, a non-aqueous electrolyte is injected into the battery case 12, a battery lid is fitted into the opening, and the battery case 12 is hermetically sealed by laser welding, whereby a rectangular non-aqueous electrolyte secondary battery is completed.
【００２０】以上説明したように、本実施形態によれ
ば、電池エレメント１の負極２を電池ケース１２に収納
する前に予備充電して金属リチウム１０からリチウムを
供給するので、実際の充放電の使用時に利用される正極
３のリチウムが無駄に消費されるようなことがなくな
り、電池容量を増加させることができる。この予備充電
は、負極２が消費するリチウムを供給するためだけのも
のであるため、定電圧電源１１が供給する電流もわずか
なものとなる。従って、容量の少ない定電圧電源１１を
用いても、真空チャンバ６内に一度に多数の電池エレメ
ント１を浸けてまとめて予備充電を行うことが可能とな
るので、生産性を高めることができる。なお、負極２
は、この予備充電で供給されたリチウムにより負極活物
質が膨張するので、先に正極３やセパレータ４と共に巻
回して電池エレメント１を形成しておく必要がある。As described above, according to the present embodiment, since the negative electrode 2 of the battery element 1 is pre-charged before being stored in the battery case 12, lithium is supplied from the metal lithium 10, so that the actual charge and discharge The lithium of the positive electrode 3 used at the time of use is not wastefully consumed, and the battery capacity can be increased. Since this pre-charging is only for supplying lithium consumed by the negative electrode 2, the current supplied from the constant voltage power supply 11 is also small. Therefore, even if the constant-voltage power supply 11 having a small capacity is used, a large number of battery elements 1 can be immersed in the vacuum chamber 6 at a time and pre-charged collectively, so that productivity can be increased. The negative electrode 2
Since the negative electrode active material expands due to the lithium supplied in the preliminary charging, it is necessary to first form the battery element 1 by winding it together with the positive electrode 3 and the separator 4.
【００２１】また、上記予備充電時に発生するガスを真
空チャンバ６内の減圧によって確実に抜くことができる
ので、角形の電池ケース１２がガス圧によって膨らむよ
うなことがなくなる。しかも、角形の電池ケース１２に
代えて、柔軟なアルミラミネートシート等を電池ケース
として用いた場合にも、同様にガス圧による膨らみを防
止することができる。ただし、ガスによる圧力上昇を防
止するためだけであれば、真空チャンバ６内を大気圧に
しておけばよいが、このように減圧すれば、非水電解液
７に溶け込んだガスや電池エレメント１の電極間等に微
細な気泡となって留まるガスも確実に除去することがで
きるようになる。Further, the gas generated during the pre-charging can be reliably removed by reducing the pressure in the vacuum chamber 6, so that the rectangular battery case 12 does not expand due to the gas pressure. Moreover, even when a flexible aluminum laminate sheet or the like is used as the battery case instead of the rectangular battery case 12, swelling due to gas pressure can be similarly prevented. However, the pressure in the vacuum chamber 6 may be set to the atmospheric pressure only to prevent the pressure increase due to the gas. However, if the pressure is reduced in this manner, the gas dissolved in the non-aqueous electrolyte 7 or the battery element 1 The gas remaining as fine bubbles between the electrodes or the like can be reliably removed.
【００２２】なお、上記実施形態では、巻回形の電池エ
レメント１について説明したが、本発明は必ずしもこれ
に限定されるものではない。また、負極２や正極３及び
セパレータ４の構成も、本実施形態の構成に限定されな
い。さらに、上記実施形態では、電池エレメント１を仮
ケース５に収納して予備充電を行ったが、他の保持具に
入れたり、電池エレメント１だけを非水電解液７に浸け
るようにすることもできる。In the above embodiment, the wound battery element 1 has been described, but the present invention is not necessarily limited to this. Further, the configurations of the negative electrode 2, the positive electrode 3, and the separator 4 are not limited to the configuration of the present embodiment. Further, in the above embodiment, the battery element 1 is stored in the temporary case 5 to perform the preliminary charging. However, the battery element 1 may be put in another holder, or the battery element 1 alone may be immersed in the non-aqueous electrolyte 7. it can.
【００２３】[0023]
【発明の効果】以上の説明から明らかなように、本発明
の非水電解質二次電池の製造方法によれば、負極の表面
反応で消費されるリチウムを事前の予備充電によって金
属リチウムから供給するので、後の充放電時に正極のリ
チウムを無駄なく利用できるようにし、電池容量を増加
させることができる。また、電池エレメントを電池ケー
スに収納する前にこの予備充電を行うので、負極の表面
反応時に発生するガスを外部に放出することができるよ
うになり、電池ケースがガス圧によって膨らむようなこ
ともなくなる。As is apparent from the above description, according to the method for producing a nonaqueous electrolyte secondary battery of the present invention, lithium consumed by the surface reaction of the negative electrode is supplied from metallic lithium by preliminary preliminary charging. Therefore, the lithium of the positive electrode can be used without waste at the time of subsequent charge and discharge, and the battery capacity can be increased. In addition, since the preliminary charging is performed before the battery element is housed in the battery case, the gas generated during the surface reaction of the negative electrode can be released to the outside, and the battery case may be expanded due to the gas pressure. Disappears.
【図１】本発明の一実施形態を示すものであって、電池
エレメントを形成する工程を示す斜視図である。FIG. 1, showing an embodiment of the present invention, is a perspective view illustrating a step of forming a battery element.
【図２】本発明の一実施形態を示すものであって、電池
エレメントを仮ケースに収納する工程を示す斜視図であ
る。FIG. 2 illustrates one embodiment of the present invention, and is a perspective view illustrating a step of housing a battery element in a temporary case.
【図３】本発明の一実施形態を示すものであって、電池
エレメントを予備充電する工程を示す斜視図である。FIG. 3, showing an embodiment of the present invention, is a perspective view illustrating a step of pre-charging a battery element.
【図４】本発明の一実施形態を示すものであって、電池
エレメントを電池ケースに収納する工程を示す斜視図で
ある。FIG. 4 illustrates one embodiment of the present invention, and is a perspective view illustrating a step of housing a battery element in a battery case.
１ 電池エレメント ２ 負極 ３ 正極 ４ セパレータ ６ 真空チャンバ ７ 非水電解液 １０ 金属リチウム １１ 定電圧電源 １２ 電池ケース DESCRIPTION OF SYMBOLS 1 Battery element 2 Negative electrode 3 Positive electrode 4 Separator 6 Vacuum chamber 7 Nonaqueous electrolyte 10 Metal lithium 11 Constant voltage power supply 12 Battery case
Claims (3)
ることにより電池エレメントを形成する電池エレメント
形成工程と、 この電池エレメントを金属リチウムと共に非水電解液中
に浸けて、この電池エレメントの負極と金属リチウムと
を電気的に接続し予備充電を行う予備充電工程と、 予備充電を終えた電池エレメントを電池ケースに収納す
るケース収納工程とを備えたことを特徴とする非水電解
質二次電池の製造方法。A battery element forming step of forming a battery element by laminating a positive electrode and a negative electrode via a separator; immersing the battery element in a non-aqueous electrolyte together with metallic lithium; Manufacturing a non-aqueous electrolyte secondary battery, comprising: a pre-charging step of electrically connecting lithium and pre-charging; and a case storing step of storing the pre-charged battery element in a battery case. Method.
負極と金属リチウムとの間に電圧を印加することにより
予備充電を行う工程であることを特徴とする請求項１に
記載の非水電解質二次電池の製造方法。2. The non-aqueous electrolyte battery according to claim 1, wherein the pre-charging step is a step of pre-charging by applying a voltage between a negative electrode of the battery element and metallic lithium. Manufacturing method of secondary battery.
内の非水電解液中で予備充電を行う工程であることを特
徴とする請求項１又は請求項２に記載の非水電解質二次
電池の製造方法。3. The non-aqueous electrolyte secondary according to claim 1, wherein the pre-charging step is a step of performing pre-charging in a non-aqueous electrolyte solution in a reduced-pressure closed container. Battery manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18679697A JP4025931B2 (en) | 1997-07-11 | 1997-07-11 | Method for producing non-aqueous electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18679697A JP4025931B2 (en) | 1997-07-11 | 1997-07-11 | Method for producing non-aqueous electrolyte secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1131531A true JPH1131531A (en) | 1999-02-02 |
| JP4025931B2 JP4025931B2 (en) | 2007-12-26 |
Family
ID=16194745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18679697A Expired - Lifetime JP4025931B2 (en) | 1997-07-11 | 1997-07-11 | Method for producing non-aqueous electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4025931B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100592231B1 (en) * | 1999-07-29 | 2006-06-22 | 삼성에스디아이 주식회사 | Electrolyte impregnation device and polymer impregnation method of polymer secondary battery |
| US7252689B2 (en) * | 2002-03-07 | 2007-08-07 | Matsushita Electric Industrial Co., Ltd. | Method for fabricating lithium ion secondary battery |
| JP2008077963A (en) * | 2006-09-21 | 2008-04-03 | Matsushita Electric Ind Co Ltd | Method and device to store lithium ion in negative electrode precursor for non-aqueous electrolyte secondary battery |
| US8263241B2 (en) | 2006-04-05 | 2012-09-11 | Panasonic Corporation | Method for manufacturing secondary battery and method for preparing positive electrode active material for secondary battery |
| US8922171B2 (en) | 2010-02-04 | 2014-12-30 | Hitachi, Ltd. | Nonaqueous electrolyte secondary battery apparatus and method for charging anode of the same |
| JP2018056548A (en) * | 2016-09-23 | 2018-04-05 | アイシン精機株式会社 | Processing device for manufacturing of power storage device and method of manufacturing power storage device |
| CN109239606A (en) * | 2018-09-14 | 2019-01-18 | 力信（江苏）能源科技有限责任公司 | A kind of pre- chemical component negative pressure abatement detecting method of lithium ion battery |
| CN114243090A (en) * | 2021-12-17 | 2022-03-25 | 中国科学院电工研究所 | Lithium pre-embedding device and method of lithium ion energy storage device |
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|---|---|---|---|---|
| JPH05242911A (en) * | 1992-02-28 | 1993-09-21 | Sanyo Electric Co Ltd | Lithium ion secondary battery |
| JPH08102333A (en) * | 1994-09-30 | 1996-04-16 | Shin Kobe Electric Mach Co Ltd | Nonaqueous electrolytic secondary battery |
| JPH09147858A (en) * | 1995-11-22 | 1997-06-06 | Fuji Photo Film Co Ltd | Nonaqueous secondary battery |
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1997
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05242911A (en) * | 1992-02-28 | 1993-09-21 | Sanyo Electric Co Ltd | Lithium ion secondary battery |
| JPH08102333A (en) * | 1994-09-30 | 1996-04-16 | Shin Kobe Electric Mach Co Ltd | Nonaqueous electrolytic secondary battery |
| JPH09147858A (en) * | 1995-11-22 | 1997-06-06 | Fuji Photo Film Co Ltd | Nonaqueous secondary battery |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100592231B1 (en) * | 1999-07-29 | 2006-06-22 | 삼성에스디아이 주식회사 | Electrolyte impregnation device and polymer impregnation method of polymer secondary battery |
| US7252689B2 (en) * | 2002-03-07 | 2007-08-07 | Matsushita Electric Industrial Co., Ltd. | Method for fabricating lithium ion secondary battery |
| US8263241B2 (en) | 2006-04-05 | 2012-09-11 | Panasonic Corporation | Method for manufacturing secondary battery and method for preparing positive electrode active material for secondary battery |
| JP2008077963A (en) * | 2006-09-21 | 2008-04-03 | Matsushita Electric Ind Co Ltd | Method and device to store lithium ion in negative electrode precursor for non-aqueous electrolyte secondary battery |
| US8922171B2 (en) | 2010-02-04 | 2014-12-30 | Hitachi, Ltd. | Nonaqueous electrolyte secondary battery apparatus and method for charging anode of the same |
| JP2018056548A (en) * | 2016-09-23 | 2018-04-05 | アイシン精機株式会社 | Processing device for manufacturing of power storage device and method of manufacturing power storage device |
| CN109239606A (en) * | 2018-09-14 | 2019-01-18 | 力信（江苏）能源科技有限责任公司 | A kind of pre- chemical component negative pressure abatement detecting method of lithium ion battery |
| CN109239606B (en) * | 2018-09-14 | 2020-06-30 | 力信（江苏）能源科技有限责任公司 | Lithium ion battery pre-formation negative pressure failure detection method |
| CN114243090A (en) * | 2021-12-17 | 2022-03-25 | 中国科学院电工研究所 | Lithium pre-embedding device and method of lithium ion energy storage device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4025931B2 (en) | 2007-12-26 |
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