TWI424604B - A method for producing a laminate type secondary battery and laminate type secondary batteries - Google Patents
A method for producing a laminate type secondary battery and laminate type secondary batteries Download PDFInfo
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- TWI424604B TWI424604B TW098116681A TW98116681A TWI424604B TW I424604 B TWI424604 B TW I424604B TW 098116681 A TW098116681 A TW 098116681A TW 98116681 A TW98116681 A TW 98116681A TW I424604 B TWI424604 B TW I424604B
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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
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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
- 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
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Description
本發明係關於一種鋰離子二次電池等之疊層型二次電池、疊層型二次電池之製造方法及使用此而成之電池組。The present invention relates to a laminated secondary battery such as a lithium ion secondary battery, a method of manufacturing a laminated secondary battery, and a battery pack using the same.
鋰離子二次電池等之疊層型二次電池，係使以鋁箔作為集電體塗佈有正極活性物質之正極、和以銅箔作為集電體塗佈有負極活性物質之負極經由分隔片相對向而成為疊層體，重疊地黏合連接到各電極之集電片而成為電流之輸入出部。In a laminated secondary battery such as a lithium ion secondary battery, a positive electrode coated with a positive electrode active material using an aluminum foil as a current collector, and a negative electrode coated with a negative electrode active material using a copper foil as a current collector are passed through a separator. The laminated body is opposed to each other, and the current collecting sheets connected to the respective electrodes are bonded to each other to form an input/output portion of the current.
圖8為說明製作集電片之習知方法的圖。圖8A為負極集電片切斷前之俯視圖，圖8B為正極片切斷前之俯視圖。Fig. 8 is a view for explaining a conventional method of manufacturing a current collecting tab. Fig. 8A is a plan view of the negative electrode current collecting sheet before cutting, and Fig. 8B is a plan view of the positive electrode sheet before cutting.
在負極活性物質塗佈部43形成後，沿著切斷線9沖切以使負極活性物質非塗佈部45之一部分在與負極活性物質塗佈部43結合之狀態下殘留為矩形狀，藉此形成負極集電片47。After the negative electrode active material application portion 43 is formed, it is die-cut along the cutting line 9 so that one portion of the negative electrode active material non-coating portion 45 remains in a rectangular shape in a state of being bonded to the negative electrode active material application portion 43. This forms the negative electrode current collecting tab 47.
同樣地在正極活性物質塗佈部53形成後，沿著切斷線9沖切以使正極活性物質非塗佈部55之一部分殘留為矩形狀，藉此形成正極集電片57。In the same manner, after the positive electrode active material application portion 53 is formed, the positive electrode current collector sheet 57 is formed by punching along the cutting line 9 so that one portion of the positive electrode active material non-coating portion 55 remains in a rectangular shape.
負極集電體和正極集電體均使用數微米至數十微米之金屬箔。The negative electrode current collector and the positive electrode current collector each use a metal foil of several micrometers to several tens of micrometers.
負極集電片47和正極集電片57均由長度比電極之橫寬短之切斷線所包圍，正極和負極中除形成有活性物質層之以外部分，由於只由厚度較薄之金屬箔所形成，因此在只切斷金屬箔部分之情況時有容易發生毛邊之問題。The negative electrode current collecting tab 47 and the positive electrode current collecting sheet 57 are each surrounded by a cutting line having a length shorter than the lateral width of the electrode, and a portion other than the active material layer is formed in the positive electrode and the negative electrode, since only a thin metal foil is formed. It is formed, so that the problem of burrs is liable to occur when only the metal foil portion is cut.
由於毛邊在電池之長期間使用過程中會有引起短路等問題，因此在切斷後必須檢查毛邊之有無，進行毛邊之除去作業，而有生產效率降低之問題。Since the burr has a problem of causing a short circuit during use of the battery for a long period of time, it is necessary to check the presence or absence of the burr after the cutting, and the burr removal operation is performed, and the production efficiency is lowered.
(專利文獻1)日本專利特開平9-129211號公報(Patent Document 1) Japanese Patent Laid-Open No. Hei 9-129211
本發明之課題為提供一種疊層型電池，其係以疊層型鋰離子二次電池等之金屬箔作為集電體在集電體上形成電極活性物質層，同時取出未塗佈有電極活性物質之集電體作為集電片，在疊層電極後重疊地黏合集電片，連接電池之電極引線並藉由外裝體加以封口而成之疊層型電池，當形成集電片時在集電片不會產生毛邊。An object of the present invention is to provide a laminated battery in which a metal foil such as a laminated lithium ion secondary battery is used as a current collector to form an electrode active material layer on a current collector, and at the same time, an electrode active is not taken out. A current collector of a substance is used as a current collecting sheet, and a current collecting sheet is laminated on the laminated electrode, and the electrode lead of the battery is connected and sealed by an external body. When the current collecting sheet is formed, The collector chip does not produce burrs.
本發明為一種疊層型二次電池，其中有：金屬箔製之正極集電體和金屬箔製之負極集電體；正極，在上述正極集電體上具有塗佈有正極活性物質之正極活性物質塗佈部和未塗佈有正極活性物質之正極活性物質未塗佈部，且以上述正極活性物質未塗佈部作為正極集電片；負極，在上述負極集電體上具有塗佈有負極活性物質之負極活性物質塗佈部和未塗佈有負極活性物質之負極活性物質未塗佈部，且以上述負極活性物質未塗佈部作為負極集電片；分隔片，配置在上述正極和上述負極之間；上述正極集電片和上述負極集電片疊層為各一部分相對向，上述分隔片亦配置在上述正極集電片和上述負極集電片相對向之部份；連接到上述正極集電片之正極引線和連接到上述負極集電片之負極引線；及上述正極引線和上述負極引線從由上述正極、上述分隔片和上述負極所構成的疊層體之同一端面，被取出到外裝材料之外部。The present invention relates to a laminated secondary battery comprising: a positive electrode current collector made of a metal foil and a negative electrode current collector made of a metal foil; and a positive electrode having a positive electrode coated with a positive electrode active material on the positive electrode current collector; The active material application portion and the positive electrode active material uncoated portion to which the positive electrode active material is not applied, and the positive electrode active material uncoated portion is used as a positive electrode current collecting sheet; and the negative electrode is coated on the negative electrode current collector a negative electrode active material application portion having a negative electrode active material and a negative electrode active material uncoated portion to which the negative electrode active material is not applied, and the negative electrode active material uncoated portion as a negative electrode current collecting sheet; and a separator; Between the positive electrode and the negative electrode; the positive electrode current collecting sheet and the negative electrode current collecting sheet are laminated so that the respective portions are opposed to each other, and the separator is also disposed at a portion of the positive electrode current collecting sheet and the negative electrode current collecting sheet; a positive electrode lead to the positive electrode current collecting tab and a negative electrode lead connected to the negative electrode current collecting tab; and the positive electrode lead and the negative electrode lead from the positive electrode, the separator, and the above The same laminate composed of the end faces of the pole, is taken out to the outside of the exterior material.
另外，上述疊層型二次電池中，上述負極和上述正極之電極活性物質塗佈部形狀均為四邊形狀，上述正極片和上述負極片隨著離開與上述正極活性物質塗佈部或上述負極活性物質塗佈部之邊界的距離而寬度變小。Further, in the above-described laminated secondary battery, the electrode active material application portion of the negative electrode and the positive electrode has a quadrangular shape, and the positive electrode sheet and the negative electrode sheet are separated from the positive electrode active material application portion or the negative electrode. The distance between the boundaries of the active material application portion is small and the width is small.
另外，上述疊層型二次電池中，上述正極片和上述負極片為大致三角形狀、大致梯形形狀、或大致五角形狀。Further, in the above-described laminated secondary battery, the positive electrode sheet and the negative electrode sheet have a substantially triangular shape, a substantially trapezoidal shape, or a substantially pentagonal shape.
上述疊層型二次電池中，上述分隔片中與上述正極集電片和上述負極集電片對向之部分，被貼附有無孔膜、或經進行加熱填孔。In the above-described laminated secondary battery, a portion of the separator that faces the positive electrode current collecting sheet and the negative electrode current collecting sheet is attached with a non-porous film or is heated and filled.
上述疊層型二次電池中，在上述正極活性物質具有鋰錳複合氧化物。In the above-described laminated secondary battery, the positive electrode active material has a lithium manganese composite oxide.
另外，本發明為一種疊層型二次電池之製造方法，其具備有：在帶狀金屬箔之至少一面，沿長度方向塗佈糊狀正極活性物質或負極活性物質並沿長度方向設置形成集電片之非塗佈部之活性物質塗佈步驟；依正極或負極之寬度大小沿長度方向切斷來製作單位電極體之步驟；在寬度方向以1或2個切斷線切斷上述單位電極體之上述非塗佈部，切斷為隨著離開與上述活性物質塗佈部之邊界部而寬度方向之長度變小，以製作具有集電片之正極和負極之步驟；經由分隔片疊層上述正極及上述負極之步驟；使該正極及負極之集電片互相黏合，黏合正極引線和負極引線之步驟；及藉由膜狀外裝材料加以封口之步驟。Moreover, the present invention provides a method for producing a laminated secondary battery, comprising: coating a paste-form positive electrode active material or a negative electrode active material along a longitudinal direction on at least one side of a strip-shaped metal foil; An active material coating step of the non-coated portion of the electric sheet; a step of cutting the unit electrode body by cutting in the longitudinal direction according to the width of the positive electrode or the negative electrode; and cutting the unit electrode by one or two cutting lines in the width direction The non-coated portion of the body is cut into a step of making the positive electrode and the negative electrode having the current collecting tab smaller in the width direction as the boundary portion from the active material application portion is separated, and is laminated via the separator. a step of forming the positive electrode and the negative electrode; a step of bonding the current collecting sheets of the positive electrode and the negative electrode to each other, bonding the positive electrode lead and the negative electrode lead; and sealing the film by the film-shaped exterior material.
另外，本發明係一種電池組，其為將疊層型電池之正極引線或負極引線串聯、並聯、或串並聯連接而成者；其中，金屬箔製之正極集電體和金屬箔製之負極集電體；正極，在上述正極集電體上具有塗佈有正極活性物質之正極活性物質塗佈部和未塗佈有正極活性物質之正極活性物質未塗佈部，且以上述正極活性物質未塗佈部作為正極集電片；負極，在上述負極集電體上具有塗佈有負極活性物質之負極活性物質塗佈部和未塗佈有負極活性物質之負極活性物質未塗佈部，且以上述負極活性物質未塗佈部作為負極集電片；分隔片，配置在上述正極和上述負極之間；上述正極集電片和上述負極集電片疊層為各一部分相對向，上述分隔片亦配置在上述正極集電片和上述負極集電片相對向之部分；連接到上述正極集電片之正極引線和連接到上述負極集電片之負極引線；及上述正極引線和上述負極引線從由上述正極、上述分隔片和上述負極所構成的疊層體之同一端面，被取出到外裝材料之外部。Further, the present invention is a battery pack in which a positive electrode lead or a negative electrode lead of a laminated battery is connected in series, in parallel, or in series and in parallel; wherein a positive electrode current collector made of a metal foil and a negative electrode made of a metal foil The positive electrode has a positive electrode active material application portion coated with a positive electrode active material and a positive electrode active material uncoated portion not coated with a positive electrode active material on the positive electrode current collector, and the positive electrode active material The uncoated portion is a positive electrode current collecting sheet, and the negative electrode includes a negative electrode active material application portion coated with a negative electrode active material and a negative electrode active material uncoated portion not coated with a negative electrode active material on the negative electrode current collector. And the negative electrode active material uncoated portion is used as a negative electrode current collecting sheet; the separator is disposed between the positive electrode and the negative electrode; and the positive electrode current collecting sheet and the negative electrode current collecting sheet are stacked so that each portion faces each other, and the partition The sheet is also disposed at a portion opposite to the positive electrode current collecting sheet and the negative electrode current collecting sheet; a positive electrode lead connected to the positive electrode current collecting sheet; and a negative electrode connected to the negative electrode current collecting sheet Line; and said positive electrode lead and the negative lead from the outside of the same end surface of the laminate of said positive electrode, negative electrode sheet and the separator constituted, is taken out to the exterior materials.
本發明之疊層型電池中，以由金屬箔構成之正極集電體及負極集電體上未塗佈有活性物質之正極活性物質非塗佈部和負極活性物質非塗佈部分別為正極集電片和負極集電片，當透過分隔片疊層正極與負極以使各活性物質層相對向時，正極集電片和負極集電片被配置為部分經分隔片而相對向，連接到正極集電片和負極集電片之正極引線及負極引線分別從疊層體之同一端面被取出，因此在切斷集電體以製造正極集電片和負極集電片時可在切斷部不會產生毛邊下進行切斷，故可提供一種可有效製造之疊層型二次電池和使用此之電池組。In the laminated battery of the present invention, the positive electrode active material non-coating portion and the negative electrode active material non-coating portion which are not coated with the active material on the positive electrode current collector and the negative electrode current collector composed of the metal foil are respectively positive electrode The current collecting sheet and the negative electrode collecting tab, when the positive electrode and the negative electrode are laminated through the separator to face each active material layer, the positive electrode current collecting tab and the negative electrode current collecting sheet are disposed to be partially opposed to each other via the separator, and are connected to The positive electrode lead and the negative electrode lead of the positive electrode current collecting tab and the negative electrode current collecting tab are respectively taken out from the same end surface of the laminate, and thus the cutting portion can be cut at the time of cutting the current collector to manufacture the positive electrode current collecting tab and the negative electrode current collecting tab. Since the cutting is not performed under the burrs, it is possible to provide a laminated secondary battery which can be efficiently manufactured and a battery pack using the same.
本發明目的在於可提供一種具有正極集電片、負極集電片之疊層型二次電池，當在製作以金屬箔作為集電體之正極和負極時，分別切斷未塗佈有正極活性物質之正極活性物質非塗佈部、及未塗佈有負極活性物質之負極活性物質非塗佈部而形成正極集電片和負極集電片之情況時，藉由切斷正極集電片和負極集電片之形狀成為特定之形狀，即使如金屬箔為厚度較薄而容易發生毛邊之構件，亦不會發生毛邊。An object of the present invention is to provide a laminated secondary battery having a positive electrode current collecting tab and a negative electrode current collecting sheet, which are respectively cut and not coated with a positive electrode when a metal foil is used as a positive electrode and a negative electrode of a current collector. When the positive electrode active material non-coating portion of the material and the negative electrode active material non-coating portion to which the negative electrode active material is not applied are formed to form the positive electrode current collecting tab and the negative electrode current collecting sheet, the positive electrode current collecting sheet is cut and The shape of the negative electrode current collecting tab has a specific shape, and even if the metal foil is a member having a thin thickness and burrs are likely to occur, burrs do not occur.
以下參照圖式用來說明本發明。The invention is described below with reference to the drawings.
圖1為說明本發明疊層型二次電池之實施形態的圖。Fig. 1 is a view for explaining an embodiment of a laminated secondary battery of the present invention.
圖1A為以垂直於疊層型二次電池之疊層面的面切斷之剖視圖。另外，圖1B為說明以圖1A之A-A線切斷之剖面的圖。Fig. 1A is a cross-sectional view taken along a plane perpendicular to a lamination plane of a laminated secondary battery. In addition, FIG. 1B is a view for explaining a cross section cut along the line A-A of FIG. 1A.
本發明之疊層型二次電池1中，電池元件2由膜狀外裝材料3封口。在電池元件2中，分別透過由合成樹脂製之多孔性膜構成之分隔片6而疊層有負極4及正極5。In the laminated secondary battery 1 of the present invention, the battery element 2 is sealed by a film-like exterior material 3. In the battery element 2, the negative electrode 4 and the positive electrode 5 are laminated by passing through the separator 6 made of a porous film made of a synthetic resin.
負極4具有：負極活性物質塗佈部43，在負極集電體41塗佈有負極活性物質；和負極活性物質非塗佈部45，未塗佈有負極活性物質；而在上述負極活性物質塗佈部之一部分或全部形成有負極集電片47。The negative electrode 4 includes a negative electrode active material application unit 43 to which the negative electrode active material 41 is coated with a negative electrode active material, and a negative electrode active material non-coating portion 45 to which the negative electrode active material is not coated; and the negative electrode active material is coated with the negative electrode active material. A negative electrode current collecting tab 47 is formed partially or entirely of the cloth portion.
圖1B所說明之負極集電片，形成為從與塗佈有負極活性物質之區域相接之部分涵蓋負極之橫寬方向全寬橫寬朝向前端部變窄。The negative electrode current collecting sheet described in FIG. 1B is formed so as to be narrowed from the full width and the lateral width of the negative electrode in a portion in contact with the region to which the negative electrode active material is applied, toward the tip end portion.
另外，正極5亦具有：正極活性物質塗佈部53，在正極集電體51塗佈有正極活性物質；和正極活性物質非塗佈部55，未塗佈有正極活性物質；而在上述正極活性物質塗佈部之一部分或全部形成有正極集電片57。In addition, the positive electrode 5 further includes a positive electrode active material application unit 53 to which the positive electrode active material 51 is coated with a positive electrode active material, and a positive electrode active material non-coating unit 55 to which the positive electrode active material is not applied. A positive electrode current collecting tab 57 is formed in part or all of the active material coating portion.
正極集電片57係與負極集電片同樣地，形成為從與塗佈有正極活性物質之區域相接之部分涵蓋負極之橫寬方向全寬橫寬朝向前端部變窄。Similarly to the negative electrode current collecting tab, the positive electrode current collecting tab 57 is formed so as to be narrower from the full width and the lateral width of the negative electrode in a portion in contact with the region where the positive electrode active material is applied, toward the tip end portion.
在負極4和正極5之間配置有分隔片6。A separator 6 is disposed between the negative electrode 4 and the positive electrode 5.
本發明之疊層型二次電池中，正極集電片及負極集電片均與集電體形成一體，所具有形狀是從與塗佈有電極活性物質之區域相接之部分涵蓋正極和負極之橫寬方向全寬橫寬朝向前端部變小。In the laminated secondary battery of the present invention, the positive electrode current collecting tab and the negative electrode current collecting tab are integrally formed with the current collector, and have a shape that covers the positive electrode and the negative electrode from a portion in contact with the region coated with the electrode active material. The full width and width of the widthwise direction become smaller toward the front end portion.
另外，分隔片6被配置為覆蓋在負極集電片47與正極集電片57相對向之區域、亦即在將負極集電片47投影在正極集電片57之情況下成為圖1B所示之大致三角形重疊部分的對向部分8間。Further, the separator 6 is disposed so as to cover the region where the negative electrode current collecting sheet 47 and the positive electrode current collecting sheet 57 face each other, that is, when the negative electrode current collecting sheet 47 is projected on the positive electrode current collecting sheet 57, as shown in FIG. 1B. Between the opposing portions 8 of the substantially triangular overlapping portion.
因此，即使在疊層具有負極集電片47和正極集電片57相對向之部分的正極和負極之情況下，亦不會在兩者對向之大致三角形區域中發生電性短路。Therefore, even in the case where the positive electrode and the negative electrode having the opposite portions of the negative electrode current collecting tab 47 and the positive electrode current collecting tab 57 are laminated, an electrical short circuit does not occur in a substantially triangular region in which the two are opposed.
另外，在負極集電片47黏合有負極引線15，在正極集電片57黏合有正極引線17。Further, a negative electrode lead 15 is bonded to the negative electrode current collecting tab 47, and a positive electrode lead 17 is bonded to the positive electrode current collecting sheet 57.
如上述，經由分隔片疊層負極與正極並黏合各集電片，在集電片黏合負極引線和正極引線後，在內部充填電解液後，從膜狀外裝材料3之封口部分取出負極引線15和正極引線17，而可製作疊層型二次電池。As described above, the negative electrode and the positive electrode are laminated via a separator, and the current collecting sheets are bonded, and after the negative electrode lead and the positive electrode lead are bonded to the current collecting sheet, after the electrolyte is filled inside, the negative electrode lead is taken out from the sealing portion of the film-shaped exterior material 3. 15 and the positive electrode lead 17, and a laminated type secondary battery can be produced.
圖2為順序地說明本發明實施形態疊層型二次電池之製造步驟的圖。Fig. 2 is a view sequentially illustrating a manufacturing procedure of a laminate type secondary battery according to an embodiment of the present invention.
圖2A為說明正極的圖，正極5係具有由塗佈有正極活性物質之正極活性物質塗佈部53、和未塗佈有正極活性物質之正極活性物質非塗佈部所構成的正極集電片57。2A is a view illustrating a positive electrode, and the positive electrode 5 has a positive electrode current collector composed of a positive electrode active material application portion 53 coated with a positive electrode active material and a positive electrode active material non-coated portion not coated with a positive electrode active material. Slice 57.
正極集電片一邊係位於塗佈有電極活性物質的部分外形之延長線上，另一邊自未塗佈有具有作為與負極活性物質塗佈部之邊界線的大致三角形外形之正極活性物質的部分形成。The positive electrode current collecting sheet is formed on an extension line of a portion of the outer shape to which the electrode active material is applied, and the other side is formed from a portion having a substantially triangular outer shape active material which is a boundary line with the negative electrode active material coating portion. .
另外，圖2B為說明本發明一實施形態之分隔片的圖，分隔片6為由三邊融著部61間歇地黏合而成之袋狀體。2B is a view illustrating a separator according to an embodiment of the present invention, and the separator 6 is a bag-like body which is intermittently bonded by the three-side fusion portion 61.
藉由融著部61形成在分隔片內部之區域設為正極5之寬度，藉此如圖2C所示當在分隔片6內安裝正極5之情況時，正極5可藉由分隔片6之融著部61定位其三邊。The region formed inside the separator by the fused portion 61 is set to the width of the positive electrode 5, whereby when the positive electrode 5 is mounted in the separator 6 as shown in FIG. 2C, the positive electrode 5 can be melted by the separator 6. The portion 61 positions its three sides.
另外，圖2D為說明本發明一實施形態之負極的圖，負極4中，在塗佈有負極活性物質之負極活性物質塗佈部43、和未塗佈有負極活性物質之負極活性物質非塗佈部，形成有負極集電片47。2D is a view illustrating a negative electrode according to an embodiment of the present invention, in which the negative electrode active material application portion 43 to which the negative electrode active material is applied and the negative electrode active material not coated with the negative electrode active material are not coated. The cloth portion is formed with a negative electrode current collecting tab 47.
負極集電片一邊係位於塗佈有電極活性物質的部分外形之延長線上，另一邊自未塗佈有具有作為與負極活性物質塗佈部之邊界線的大致三角形外形之負極活性物質的部分形成。The negative electrode current collecting tab is formed on an extension line of a portion of the outer shape of the electrode active material coated thereon, and the other side is formed from a portion having a substantially triangular outer shape active material as a boundary line with the negative electrode active material coating portion. .
另外，圖2E為說明疊層圖2C所示插入有正極之分隔片、和圖2D所說明之負極後之狀態的圖。2E is a view for explaining a state in which the separator having the positive electrode inserted in FIG. 2C and the negative electrode illustrated in FIG. 2D are laminated.
正極5經由圖2C所說明分隔片6內部之融著部61對分隔片進行定位，因此藉由定位與分隔片6之外形部直角相交之二稜邊和負極4之二稜邊，可容易決定正極5和經由分隔片疊層之負極4之相對位置，可製作負極和正極兩者之位置關係正確的疊層體。The positive electrode 5 is positioned by the fused portion 61 inside the separator 6 illustrated in FIG. 2C, and thus can be easily determined by positioning the two edges of the rectangular portion at the right angle of the outer portion of the separator 6 and the negative electrode 4 at the right angle. The relative position of the positive electrode 5 and the negative electrode 4 laminated via the separator can produce a laminate having the correct positional relationship between the negative electrode and the positive electrode.
如此，可藉由設在分隔片之融著部定位正極，由分隔片之周邊部定位負極。In this manner, the positive electrode can be positioned by the fused portion provided in the separator, and the negative electrode can be positioned by the peripheral portion of the separator.
如此一來，可容易進行經特定正極與負極之相對位置的疊層。In this way, the lamination of the relative positions of the specific positive electrode and the negative electrode can be easily performed.
另外，如圖2E所示，在負極集電片47和正極集電片57之對向部分8存在有分隔片，由此可防止負極集電片47和正極集電片57間之電性短路。In addition, as shown in FIG. 2E, a separator is present in the opposing portion 8 of the negative electrode current collecting tab 47 and the positive electrode current collecting tab 57, whereby electrical short between the negative electrode current collecting tab 47 and the positive electrode current collecting tab 57 can be prevented. .
如此一來，在疊層既定個數負極、分隔片和正極後，相互黏合負極集電片47和正極集電片57後，在負極集電片47黏合負極引線15，在正極集電片57黏合正極引線17，藉由膜狀外裝材料加以封口。In this manner, after laminating a predetermined number of negative electrodes, separators, and positive electrodes, the negative electrode current collecting tabs 47 and the positive electrode current collecting sheets 57 are bonded to each other, and then the negative electrode current collecting tabs 47 are bonded to the negative electrode lead wires 15, and the positive electrode current collecting tabs 57 are bonded to the positive electrode current collecting sheets 57. The positive electrode lead 17 is bonded and sealed by a film-like exterior material.
另外，圖2F為說明本發明另一實施形態之圖。2F is a view for explaining another embodiment of the present invention.
圖2F所示之分隔片6中，在負極集電片47和正極集電片57與對向部分8對應的部分，貼附有無孔膜63。藉由如此貼著無孔膜，可確實防止負極集電片47和正極集電片57在對向部分8的兩者接觸。In the separator 6 shown in Fig. 2F, a non-porous film 63 is attached to a portion of the negative electrode current collecting sheet 47 and the positive electrode current collecting sheet 57 corresponding to the opposing portion 8. By thus adhering the non-porous film, it is possible to surely prevent the negative electrode current collecting tab 47 and the positive electrode current collecting sheet 57 from coming into contact with each other in the opposing portion 8.
另外，取代無孔膜，亦可將負極集電片47和正極集電片57之對向部分8的分隔片6進行加熱填孔，更進一步在將分隔片進行加熱填孔後再一併進行多層化。Further, instead of the non-porous film, the negative electrode current collecting sheet 47 and the separator 6 of the opposing portion 8 of the positive electrode current collecting sheet 57 may be heated and filled, and further, the separator may be heated and filled. Multi-layered.
圖3為說明正極和負極之製作方法的圖。圖3A和圖3B為說明負極之圖，圖3C和圖3D為說明正極之圖。Fig. 3 is a view for explaining a method of producing a positive electrode and a negative electrode. 3A and 3B are views for explaining a negative electrode, and Figs. 3C and 3D are views for explaining a positive electrode.
圖3A為在負極集電體形成負極活性物質塗佈部43和作為負極集電片47之未塗佈有負極活性物質的負極活性物質非塗佈部45而成者。3A is a view in which a negative electrode active material application portion 43 and a negative electrode active material non-coating portion 45 which is not coated with a negative electrode active material as a negative electrode current collector 47 are formed in the negative electrode current collector.
然後，藉由沿著切斷線9切斷未塗佈有負極活性物質之區域，而如圖3B所示可製作出形成有負極集電片47之負極。Then, by cutting the region where the negative electrode active material is not applied along the cutting line 9, a negative electrode on which the negative electrode current collecting tab 47 is formed can be produced as shown in Fig. 3B.
在如圖所示沿著直線狀之切斷線切斷未塗佈有負極活性物質的負極集電體之金屬箔部分情況時，不會產生毛邊。When the metal foil portion of the negative electrode current collector not coated with the negative electrode active material is cut along a linear cutting line as shown in the drawing, no burrs are generated.
關於正極，亦與負極同樣地如圖3C所示，為在正極集電體形成正極活性物質塗佈部53和作為正極集電片57之未塗佈有正極活性物質的正極活性物質非塗佈部55而成者。藉由沿著切斷線9切斷正極活性物質非塗佈部55，如圖3D所示可製作出形成有正極集電片57之正極。In the same manner as the negative electrode, as shown in FIG. 3C, the positive electrode active material application portion 53 and the positive electrode active material for the positive electrode current collector sheet are not coated with the positive electrode active material. Part 55 is the original. By cutting the positive electrode active material non-coating portion 55 along the cutting line 9, a positive electrode on which the positive electrode current collecting sheet 57 is formed can be produced as shown in Fig. 3D.
圖4為順序地說明本發明另一實施形態之疊層型二次電池之製造步驟的圖。FIG. 4 is a view sequentially illustrating a manufacturing procedure of a laminate type secondary battery according to another embodiment of the present invention.
圖4中所說明實施形態之疊層型二次電池，相較於圖2所說明之實施形態除了負極集電片和正極集電片之上端部形狀、及分隔片形狀外，其餘部分均相同。The laminated secondary battery of the embodiment illustrated in Fig. 4 has the same configuration as the embodiment of the negative electrode current collecting sheet and the positive electrode current collecting sheet except for the shape of the upper end of the negative electrode current collecting sheet and the positive electrode current collecting sheet, and the shape of the separator. .
亦即，如圖4A、圖4D所示，不同處在於負極集電片47具有梯形形狀之外形，正極集電片57上端部之負極引線端子安裝部、及負極引線端子安裝部平行於負極及正極之活性物質塗佈部和活性物質非塗佈部之邊界。That is, as shown in FIGS. 4A and 4D, the difference is that the negative electrode current collecting tab 47 has a trapezoidal outer shape, and the negative electrode lead terminal mounting portion at the upper end portion of the positive electrode current collecting tab 57 and the negative electrode lead terminal mounting portion are parallel to the negative electrode and The boundary between the active material application portion of the positive electrode and the non-coated portion of the active material.
負極集電片47及正極集電片一邊係位於塗佈有電極活性物質的部分外形之延長線上，一邊為與負極活性物質塗佈部之邊界線，一邊自未塗佈有作為與負極活性物質塗佈部之邊界線平行之大致梯形形狀的負極活性物質之部分形成。The negative electrode current collecting sheet 47 and the positive electrode current collecting sheet are not coated with the negative electrode active material from the boundary line with the negative electrode active material application portion while being on the extension line of the partial shape of the electrode active material. A portion of the negative electrode active material having a substantially trapezoidal shape in which the boundary line of the coating portion is parallel is formed.
另外，相異處在於分隔片6之上端部為沿大致三角形之外形而成者，以覆蓋負極集電片47與正極集電片57相對向之區域、亦即覆蓋將負極集電片47投影於正極集電片57之情況的大致三角形重疊部分8。In addition, the difference is that the upper end portion of the separator 6 is formed in a substantially triangular shape so as to cover the region where the negative electrode current collecting tab 47 and the positive electrode current collecting sheet 57 face each other, that is, the projection of the negative electrode current collecting sheet 47 is covered. A substantially triangular overlapping portion 8 in the case of the positive electrode tab 57.
如此，藉由變更負極集電片、正極集電片、及分隔片之形狀，而在負極集電片和正極集電片兩者未相對向之部分未存在有分隔片，因此可獲得容易處理負極集電片和正極集電片之效果。Thus, by changing the shapes of the negative electrode current collecting tab, the positive electrode current collecting tab, and the separator, the separator is not present in the opposite portions of the negative electrode current collecting tab and the positive electrode current collecting tab, so that it can be easily handled. The effect of the negative electrode current collecting tab and the positive electrode current collecting tab.
圖5為說明另一實施形態之正極和負極之製作方法的圖。圖5A和圖5B為說明負極的圖，圖5C和圖5D為說明正極的圖。Fig. 5 is a view for explaining a method of producing a positive electrode and a negative electrode according to another embodiment. 5A and 5B are views for explaining a negative electrode, and Figs. 5C and 5D are views for explaining a positive electrode.
圖5A為在負極集電體形成負極活性物質塗佈部43和作為負極集電片47之未塗佈有負極活性物質的區域而成者。FIG. 5A is a view in which the negative electrode active material application portion 43 and the negative electrode current collector sheet 47 are not coated with the negative electrode active material in the negative electrode current collector.
另外，藉由將未塗佈有負極活性物質之區域設為由從負極活性物質塗佈部之兩寬延伸之外形線、與此結合之二切斷線91、92、及負極活性物質塗佈部和非塗佈部之邊界線所包圍的大致五角形，而如圖5B所示可製作出形成有負極集電片47之負極。In addition, a region in which the negative electrode active material is not applied is formed by a line extending from the width of the negative electrode active material application portion, a second cutting line 91, 92 bonded thereto, and a negative electrode active material coating. The substantially pentagonal shape surrounded by the boundary line between the portion and the uncoated portion, and the negative electrode on which the negative electrode current collecting tab 47 is formed can be formed as shown in FIG. 5B.
未塗佈有負極活性物質的負極集電體之金屬箔部分，如圖所示只由活性物質塗佈部之延長部和二條直線狀切斷線切斷，因此與圖2所示同樣地不會產生毛邊。The metal foil portion of the negative electrode current collector to which the negative electrode active material is not applied is cut only by the extension portion of the active material application portion and the two linear cutting lines as shown in the drawing, and therefore is not the same as that shown in Fig. 2 . Will produce burrs.
另外，正極集電片亦與負極集電片同樣地，如圖5C所示藉由沿著切斷線91、92切斷未塗佈有正極活性物質之區域，而如圖5D所示可製作出形成有正極集電片57之正極。Further, similarly to the negative electrode current collecting sheet, as shown in FIG. 5C, the positive electrode current collecting sheet can be cut as shown in FIG. 5D by cutting the region not coated with the positive electrode active material along the cutting lines 91 and 92. The positive electrode on which the positive electrode current collecting tab 57 is formed is formed.
其次說明將電極活性物質塗佈在集電體來製造本發明電極之步驟。Next, the step of coating the electrode active material on the current collector to produce the electrode of the present invention will be described.
圖6為說明本發明電極之製造步驟的圖，為以負極為例而說明的圖。另外，對於正極亦可以同樣方式製造。Fig. 6 is a view for explaining a manufacturing step of the electrode of the present invention, and is a view illustrating a negative electrode as an example. In addition, the positive electrode can also be produced in the same manner.
如圖6A所示，在帶狀負極集電體41A塗佈負極活性物質之糊。負極活性物質之塗佈間歇地形成為有形成負極活性物質塗佈部43和未塗佈有負極活性物質之負極活性物質非塗佈部45。負極活性物質非塗佈部45之大小依照所形成之負極集電片大小而決定。As shown in FIG. 6A, a paste of a negative electrode active material is applied to the strip-shaped negative electrode current collector 41A. The application of the negative electrode active material is intermittently formed to form the negative electrode active material application portion 43 and the negative electrode active material non-coating portion 45 to which the negative electrode active material is not applied. The size of the negative electrode active material non-coating portion 45 is determined in accordance with the size of the negative electrode current collector sheet to be formed.
其次，如圖6B所示，以與構成疊層型二次電池之疊層體的一個負極寬度相當之寬度，沿著切斷線93切斷塗佈有負極活性物質之帶狀集電體。Then, as shown in FIG. 6B, the strip-shaped current collector coated with the negative electrode active material is cut along the cutting line 93 with a width corresponding to the width of one negative electrode of the laminate constituting the laminated secondary battery.
圖6C所示例中，對於沿負極寬度切斷之帶狀體41B，依垂直於帶狀體長度方向之切斷線94以切斷線切斷接近負極活性物質非塗佈部45之部分的負極活性物質塗佈部43，同時以傾斜於帶狀體長度方向之方向的切斷線95來切斷負極活性物質非塗佈部45而可獲得負極4。In the example shown in Fig. 6C, the strip-shaped body 41B cut along the negative electrode width is cut by a cutting line perpendicular to the longitudinal direction of the strip-shaped body by a cutting line close to a portion of the negative electrode active material non-coating portion 45. In the active material application portion 43, the negative electrode active material non-coating portion 45 is cut by the cutting line 95 inclined in the longitudinal direction of the strip-shaped body, whereby the negative electrode 4 can be obtained.
在此方法中，因為可獲得形狀對帶狀體之長度方向對齊之負極4，因此不需要之後旋轉等操作。In this method, since the negative electrode 4 whose shape is aligned with the longitudinal direction of the strip is obtained, an operation such as post-rotation is not required.
圖6D所示例中，對於沿負極寬度切斷之帶狀體41B，依垂直於帶狀體長度方向之切斷線94切斷接近經由活性物質非塗佈部而鄰接之負極活性物質塗佈部43兩側之負極活性物質非塗佈部45的部分之負極活性物質塗佈部，同時利用傾斜於對帶狀體長度方向之方向的切斷線95來切斷位於上述負極活性物質塗佈部之間的負極活性物質非塗佈部45，而可獲得負極4。In the example shown in FIG. 6D, the strip-shaped body 41B cut along the width of the negative electrode is cut by the cutting line 94 perpendicular to the longitudinal direction of the strip, and the negative electrode active material application portion adjacent to the non-coated portion via the active material is cut. The negative electrode active material application portion of the portion of the negative electrode active material non-coating portion 45 on both sides of the negative electrode active material is applied to the negative electrode active material application portion by a cutting line 95 inclined in the longitudinal direction of the strip-shaped body. The negative electrode active material is not applied to the portion 45, and the negative electrode 4 can be obtained.
圖6E所示例中，在沿負極寬度切斷之帶狀體41B，經由負極活性物質非塗佈部45而形成有2個部分長度之負極活性物質塗佈部43A。In the example shown in FIG. 6E, the negative electrode active material application portion 43A having two partial lengths is formed through the negative electrode active material non-coating portion 45 in the strip-shaped body 41B cut along the negative electrode width.
藉由垂直於帶狀體長度方向之切斷線94來切斷負極活性物質塗佈部43A之帶狀體長度方向之中間點，同時藉由傾斜於帶狀體長度方向之方向的切斷線95來切斷負極活性物質非塗佈部45，而可獲得負極4。The cutting point line 94 perpendicular to the longitudinal direction of the strip body cuts the intermediate point in the longitudinal direction of the strip-shaped body of the negative electrode active material applying portion 43A while being cut by the cutting line in the direction of the longitudinal direction of the strip-shaped body. In 95, the negative electrode active material non-coating portion 45 is cut, and the negative electrode 4 can be obtained.
圖6D、6E所示之方法中，廢棄之構件量變少，但需要藉由旋轉等對齊所製作之負極4。In the method shown in Figs. 6D and 6E, the amount of the discarded member is small, but it is necessary to align the prepared negative electrode 4 by rotation or the like.
其次，參照圖式而說明結合有多個本發明疊層型二次電池而成電池組之一實施形態。Next, an embodiment of a battery pack in which a plurality of laminated secondary batteries of the present invention are combined will be described with reference to the drawings.
圖7為說明電池組之一實施形態的圖。圖7A為從電極引線側觀看到之前視圖，圖7B為省略與電極引線側相反側之部分之俯視圖。Fig. 7 is a view for explaining an embodiment of a battery pack. Fig. 7A is a front view as seen from the side of the electrode lead, and Fig. 7B is a plan view of a portion on the side opposite to the side of the electrode lead.
電池組100為藉由連結導電構件19A1~19A3串聯連接4個疊層型二次電池1之電極引線15A2~15A4、17B1~17B3而成者，在與外部電路連接用之電極端子15A1、17B4黏合有矩形平板狀之片端子21A、21B。The battery pack 100 is formed by connecting the electrode leads 15A2 to 15A4 and 17B1 to 17B3 of the four laminated secondary batteries 1 in series by connecting the conductive members 19A1 to 19A3, and bonding them to the electrode terminals 15A1 and 17B4 for external circuit connection. There are rectangular flat sheet terminals 21A, 21B.
另外，藉由錫焊等在連接部27A、27B中連接連接引線23A1、23B1之芯線部分25A、25B於片端子21A、21B。然後，在各片端子21A、21B先連接連接引線後，在黏合部29A、29B藉由點熔接等與電極端子黏合。Further, the core portions 25A and 25B of the connection leads 23A1 and 23B1 are connected to the sheet terminals 21A and 21B in the connection portions 27A and 27B by soldering or the like. Then, after the connection leads are connected to the respective chip terminals 21A and 21B, the bonding portions 29A and 29B are bonded to the electrode terminals by spot welding or the like.
更進一步，藉由如上述電性地串聯、並聯、串並聯連接多個疊層型二次電池而成一體化，可提供一種具有任意輸出電壓、輸出電流之電池組。Further, by integrating a plurality of stacked secondary batteries electrically, in series, in parallel, in series and in parallel as described above, it is possible to provide a battery pack having an arbitrary output voltage and an output current.
另外，亦可在該等電池裝設保護電路、控制電路等。In addition, a protection circuit, a control circuit, or the like may be mounted on the batteries.
下面說明本發明之疊層型二次電池為鋰離子電池之情況。Next, the case where the laminated secondary battery of the present invention is a lithium ion battery will be described.
在正極中，以鋁箔作為正極集電體於正極集電體上形成有正極活性物質。In the positive electrode, a positive electrode active material is formed on the positive electrode current collector using an aluminum foil as a positive electrode current collector.
關於正極活性物質，就摻雜、非摻雜鋰錳複合氧化物、鋰鈷複合氧化物、鋰鎳複合氧化物、或含錳、鈷、鎳等之鋰複合氧化物等之鋰的鋰過渡金屬複合氧化物，N-甲基咯啶酮等之溶劑一起混合碳黑等之賦予導電性材料、聚氟化亞乙烯等之黏著劑，成為漿狀塗佈在正極集電體上而加以乾燥，再由滾壓機等進行壓延以形成正極活性物質層，可製作正極。The lithium active transition metal of the doped, undoped lithium manganese composite oxide, lithium cobalt composite oxide, lithium nickel composite oxide, or lithium composite oxide containing manganese, cobalt, nickel, etc. A solvent such as a composite oxide or N-methylrrolidone is mixed with a conductive material such as carbon black or the like, and an adhesive such as polyvinyl fluoride is applied to the positive electrode current collector in a slurry form and dried. Further, rolling is performed by a rolling machine or the like to form a positive electrode active material layer, whereby a positive electrode can be produced.
另外，關於負極，以銅箔作為負極集電體，就摻雜、非摻雜黑鉛粉末等之鋰的負極活性物質，與N-甲基咯啶酮等之溶劑一起混合碳黑等之賦予導電性材料、聚氟化亞乙烯等之黏著劑，成為漿狀塗佈在負極集電體上而加以乾燥，再由滾壓機等進行壓延以形成負極活性物質層，可製作負極。In addition, in the negative electrode, a negative electrode active material of lithium, such as doped or undoped black lead powder, is mixed with a solvent such as N-methylrrolidone, such as carbon black, by using a copper foil as a negative electrode current collector. An adhesive such as a conductive material or a polyvinylidene fluoride is applied to a negative electrode current collector in a slurry form and dried, and then rolled by a rolling machine or the like to form a negative electrode active material layer, whereby a negative electrode can be produced.
就設有正極集電片之正極和設有負極集電片之負極之各個，亦在正極集電片和負極集電片相對向之部分介設由聚乙烯、聚丙烯等構成之分隔片，疊層既定片數而形成電池元件之疊層體。A positive electrode provided with a positive electrode current collecting tab and a negative electrode provided with a negative electrode current collecting sheet are also provided, and a separator composed of polyethylene, polypropylene, or the like is interposed between the positive electrode current collecting sheet and the negative electrode current collecting sheet. A laminate of battery elements is formed by laminating a predetermined number of sheets.
其次，可在乙烯碳酸酯(EC)、二甲基碳酸酯(DMC)、二乙基碳酸酯(DEC)等之碳酸酯類、ν-丁內酯等之內酯類，充填添加有LiPF6等電解質之電解液後，引出正極引線和負極引線，可由不會洩漏或滲透水分之膜狀外裝材料加以封口。Next, a lactone such as ethylene carbonate (EC), dimethyl carbonate (DMC) or diethyl carbonate (DEC), or a lactone such as ν-butyrolactone may be added with LiPF6 or the like. After the electrolyte of the electrolyte, the positive electrode lead and the negative electrode lead are taken out and sealed by a film-like exterior material that does not leak or permeate moisture.
作為膜狀外裝材料，最好使用膜狀外裝材料層，該膜狀外裝材料層為在鋁箔之內面疊層聚乙烯，聚丙烯等熱融著性良好之層、在外面疊層強度較大且具有鋁箔保護層之作用的尼龍、聚酯等之層。As the film-like exterior material, it is preferable to use a film-like exterior material layer in which a layer of polyethylene, polypropylene or the like having a good heat fusion property is laminated on the inner surface of the aluminum foil, and laminated on the outer surface. A layer of nylon, polyester or the like which has a high strength and functions as an aluminum foil protective layer.
其次說明根據本發明之實施形態所製作成的鋰離子二次電池之一例。作為負極集電體係使用10μm之銅箔，作為正極集電體係使用20μm之鋁箔。Next, an example of a lithium ion secondary battery fabricated according to an embodiment of the present invention will be described. A copper foil of 10 μm was used as the negative electrode current collecting system, and an aluminum foil of 20 μm was used as the positive electrode current collecting system.
負極活性物質為在石墨調配碳黑作為導電性賦予材料，在聚氟化亞乙烯添加N-甲基咯啶酮作為黏著劑來調製負極活性物質糊而成者。The negative electrode active material is prepared by blending carbon black as a conductivity imparting material in graphite and N-methylrrolidone as a binder in polyvinylidene fluoride to prepare a negative electrode active material paste.
對於正極活性物質，為使用LiMn2 O4 ，與負極同樣地，調配碳黑作為導電性賦予材料，在聚氟化亞乙烯添加N-甲基咯啶酮作為黏著劑來調製正極活性物質糊而成者。In the positive electrode active material, LiMn 2 O 4 is used, and carbon black is blended as a conductivity imparting material in the same manner as the negative electrode, and N-methylrrolidone is added as an adhesive to prepare a positive electrode active material paste. Adult.
其次，在負極集電體和正極集電體殘留負極集電片和正極集電片之形成部而分別塗佈糊後，切斷為先前圖2所示之形狀，製作成正極集電片和負極集電片。Next, after the negative electrode current collector and the positive electrode current collector are left in the formation portions of the negative electrode current collecting sheet and the positive electrode current collecting sheet, respectively, the paste is applied, and then cut into the shape shown in FIG. 2 to prepare a positive electrode current collecting sheet and Negative current collector tab.
其次，透過聚丙烯製分隔片疊層4片正極和5片負極，而製作出外形尺寸為82×150×4mm之鋰離子二次電池，但可製作在負極集電片和正極集電片不會產生毛邊之具優異特性鋰離子電池。Next, four positive electrodes and five negative electrodes were laminated through a polypropylene separator to produce a lithium ion secondary battery having an outer shape of 82 × 150 × 4 mm, but it was fabricated on the negative electrode current collecting tab and the positive electrode current collecting sheet. A lithium-ion battery with excellent properties that produces burrs.
本發明疊層型二次電池為沿單純之線切斷由以金屬箔作為集電體之正極及負極所製成一體的負極集電片和正極集電片之形狀，可以容易地進行切斷。而且，因為沿單純之線進行切斷，因此不容易出現毛邊等，在進行沖切切斷之情況時，亦可容易調整沖切用之模具，可提高疊層型二次電池之生產性。The laminated secondary battery of the present invention can be easily cut by simply cutting a shape of a negative electrode current collecting tab and a positive electrode current collecting tab which are integrally formed of a positive electrode and a negative electrode which are made of a metal foil as a current collector. . In addition, since the cutting is performed along a simple line, burrs or the like are less likely to occur, and when the punching and cutting are performed, the die for punching can be easily adjusted, and the productivity of the laminated secondary battery can be improved.
1‧‧‧疊層型二次電池1‧‧‧Laminated secondary battery
2‧‧‧電池元件2‧‧‧ battery components
3‧‧‧膜狀外裝材料3‧‧‧membranous exterior materials
4‧‧‧負極4‧‧‧negative
5‧‧‧正極5‧‧‧ positive
6‧‧‧分隔片6‧‧‧Separator
8‧‧‧對向部分8‧‧‧ opposite part
9、91、92、93、94、95‧‧‧切斷線9, 91, 92, 93, 94, 95‧‧‧ cut lines
15‧‧‧負極引線15‧‧‧Negative lead
15A1~15A4‧‧‧電極引線15A1~15A4‧‧‧electrode lead
17‧‧‧正極引線17‧‧‧ positive lead
17B1~17B3．．．電極引線17B1~17B3. . . Electrode lead
19A1~19A3．．．連結導電構件19A1~19A3. . . Connecting conductive member
21A、21B．．．片端子21A, 21B. . . Chip terminal
23A、23B．．．連接引線23A, 23B. . . Connection lead
25A、25B．．．芯線部分25A, 25B. . . Core portion
27A、27B．．．連接部27A, 27B. . . Connection
29A、29B．．．黏合部29A, 29B. . . Adhesive part
41．．．負極集電體41. . . Negative current collector
41A、41B．．．帶狀體41A, 41B. . . Band
43．．．負極活性物質塗佈部43. . . Negative electrode active material coating unit
43A．．．2個部分長度之負極活性物質塗佈部43A. . . Two partial length negative electrode active material coating sections
45．．．負極活性物質非塗佈部45. . . Negative electrode active material non-coating part
47．．．負極集電片47. . . Negative current collector
51．．．正極集電體51. . . Positive current collector
53．．．正極活性物質塗佈部53. . . Positive electrode active material coating unit
55．．．正極活性物質非塗佈部55. . . Positive electrode active material non-coating part
57．．．正極集電片57. . . Positive current collector
61．．．融著部61. . . Melting department
63．．．無孔膜63. . . Non-porous film
100．．．電池組100. . . Battery
圖1A及1B為說明本發明疊層型二次電池之實施形態的圖。1A and 1B are views for explaining an embodiment of a laminated secondary battery of the present invention.
圖2A至2F為依序說明本發明實施形態疊層型二次電池之製造步驟的圖。2A to 2F are views sequentially showing the steps of manufacturing a laminated secondary battery according to an embodiment of the present invention.
圖3A至3D為說明正極和負極之製作方法的圖。3A to 3D are views for explaining a method of fabricating a positive electrode and a negative electrode.
圖4A至4F為依序說明本發明另一實施形態疊層型二次電池之製造步驟的圖。4A to 4F are views sequentially showing the steps of manufacturing a laminated secondary battery according to another embodiment of the present invention.
圖5A至5D為說明另一實施形態正極和負極之製作方法的圖。5A to 5D are views for explaining a method of fabricating a positive electrode and a negative electrode according to another embodiment.
圖6A至6E為說明本發明電極之製造步驟的圖。6A to 6E are views for explaining the steps of manufacturing the electrode of the present invention.
圖7A及7B為說明電池組的圖。7A and 7B are views for explaining a battery pack.
圖8A及8B為說明製作集電片之習知方法的圖。8A and 8B are diagrams illustrating a conventional method of fabricating a current collecting tab.
1．．．疊層型二次電池1. . . Laminated secondary battery
2．．．電池元件2. . . Battery component
3．．．膜狀外裝材料3. . . Membrane exterior material
4．．．負極4. . . negative electrode
5．．．正極5. . . positive electrode
6．．．分隔片6. . . Separator
8．．．對向部分8. . . Opposite part
15．．．負極引線15. . . Negative electrode lead
17．．．正極引線17. . . Positive lead
41．．．負極集電體41. . . Negative current collector
43．．．負極活性物質塗佈部43. . . Negative electrode active material coating unit
45．．．負極活性物質非塗佈部45. . . Negative electrode active material non-coating part
47．．．負極集電片47. . . Negative current collector
51．．．正極集電體51. . . Positive current collector
53．．．正極活性物質塗佈部53. . . Positive electrode active material coating unit
55．．．正極活性物質非塗佈部55. . . Positive electrode active material non-coating part
57．．．正極集電片57. . . Positive current collector
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