201143190 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種鋰離子電池組。 【先前技術] [0002] 先前的鋰離子電池通常可分為捲繞式及層墨式兩類，其 包括外殼體、封裝於外殼體内的正極片、負極片、隔膜 及電解液。該隔膜設置於正極片與負極片之間。該電解 液充分浸潤正極片、負極片及隔膜。所述正極片包括一 正極集流體及形成於該正極集流體表面的正極材料層。 所述負極片包括一負極集流體及形滅於該負極集流體表 面的負極材料層。 [0003] 層疊式的鋰離子電池可包括複數層交疊設置並藉由隔膜 間隔的正、負極片。為減小裡離子電池的厚度，正、負 極片間的麼合較為緊密’從而造成向正、負極片間注入 電解液較為困難。正、負極片的面積越大，電解液越難 以注入。故，為使電解液能夠滲透並充分浸潤至正負 〇 極片的中部，於製造的過程中通常需要將注入電解液後 的裡離子電池放置較長㈣。這—缺點在動力大電池的 製造過程巾尤為日蝴電解錢的動力大電池往往 需要放置十幾小時甚至更長時間，大大影響了鋰離子電 池的生產效率。另，這種緊密壓合的正負極片使充放電 過程中鋰離子電池内部產生的氣體不易向外排出，影響 鋰離子電池的性能。 【發明内容】 [0004] #鑒於此’提供-種易於注人電解液且在使用過程中氣 099116434 表單編號A0101 苐3頁/共30頁 0992029220-0 201143190 [0005] [0006] [0007] [0008] [0009] [0010] 易於排出的鋰離子電池組實為必要。 ，種鯉離子電池纟且，其包括複數相互電連接的電池單體 乂電也單體包括層4並間隔設置的正極片及負極片， ^正極片具有至少—第-通孔，該負極片具有至少一第 通孔，邊第二通孔與該第一通孔位置對應。 -種鐘離子電缝，其包括複數相互電連接的電池單體 ’遠電池單體包括複數正極片及複數負極片，該複數正 極片與複數負極片交替層疊並間隔設置，該每個正極片 複數第—通孔，該每個負極』具有複數第二通孔， 忒母個第二通孔均與—個第一通孔對應。 相較於先前技術，所述_子電池組的正、負極片均具 有通孔，㈣解液易於從軌巾以«輕正、負極 片中部’並且在充放電過程中，該輯子電池組内部產 生的氣體易於從通孔排出。 【實施方式】 下面將結合圖式及具體實施㈣本發明提供的鐘離子電 池組作進一步的詳細說明。 本發明實施·供-種轉子電池⑽，其包括複數相 互之間串聯或並聯連接的鋰離子電池單體“Ο 0 請參閱圖1及圖2，該鋰離子電池單體1〇〇其包括正極片 m '負極片104 '隔膜106、非水性電解液及外部封裝 結構108。該外部封裝結構108將正極月1〇2、負極片1〇4 、隔膜106及非水性電解液封裝其間。該正極片ι〇2與負 極片104層疊設置，並藉由隔膜1〇6相互間隔。該層疊的 099116434201143190 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a lithium ion battery pack. [Prior Art] [0002] Previous lithium ion batteries are generally classified into two types, a wound type and a layered type, which include an outer casing, a positive electrode sheet encapsulated in the outer casing, a negative electrode sheet, a separator, and an electrolyte. The separator is disposed between the positive electrode tab and the negative electrode tab. The electrolytic solution sufficiently wets the positive electrode sheet, the negative electrode sheet, and the separator. The positive electrode sheet includes a positive electrode current collector and a positive electrode material layer formed on a surface of the positive electrode current collector. The negative electrode sheet includes a negative electrode current collector and a negative electrode material layer which is formed on the surface of the negative electrode current collector. [0003] A stacked lithium ion battery may include a plurality of positive and negative sheets that are overlapped and disposed by a separator. In order to reduce the thickness of the ion battery, it is difficult to inject the electrolyte between the positive and negative electrodes. The larger the area of the positive and negative electrode sheets, the harder it is to inject the electrolyte. Therefore, in order to allow the electrolyte to penetrate and fully infiltrate into the middle of the positive and negative bismuth sheets, it is usually necessary to place the ionic battery after the electrolyte injection for a long period in the manufacturing process (4). This is a disadvantage. In the manufacturing process of power large batteries, the power of the battery is often required to be placed for more than ten hours or more, which greatly affects the production efficiency of the lithium ion battery. In addition, the tightly pressed positive and negative electrode sheets make it difficult for the gas generated inside the lithium ion battery to be discharged outward during charging and discharging, which affects the performance of the lithium ion battery. [Description of the Invention] [0004] # Given this 'provided - kind of easy to inject electrolyte and in the process of gas 099116434 Form No. A0101 苐 3 pages / Total 30 pages 0992029220-0 201143190 [0005] [0006] [0007] [ [0009] [0010] A lithium ion battery pack that is easy to discharge is necessary. The 鲤 ion battery includes a plurality of battery cells electrically connected to each other, and the positive electrode and the negative electrode sheets each having a layer 4 and spaced apart from each other, and the positive electrode sheet has at least a first through hole. There is at least one first through hole, and the second through hole corresponds to the first through hole position. - a plasma ion gap comprising a plurality of battery cells electrically connected to each other. The remote battery cell comprises a plurality of positive electrode sheets and a plurality of negative electrode sheets, and the plurality of positive electrode sheets and the plurality of negative electrode sheets are alternately laminated and spaced apart, and each of the positive electrode sheets The plurality of through holes, each of the negative electrodes has a plurality of second through holes, and the second through holes of the first and second holes correspond to the first through holes. Compared with the prior art, the positive and negative electrodes of the _ sub-battery have a through hole, and (4) the effluent is easy to be from the track to “light positive, middle of the negative electrode” and during the charging and discharging process, the battery pack The internally generated gas is easily discharged from the through hole. [Embodiment] Hereinafter, a clock ion battery pack provided by the present invention will be further described in detail in conjunction with the drawings and the specific implementation (4). The present invention provides a rotor battery (10) comprising a plurality of lithium ion battery cells connected in series or in parallel with each other "Ο 0, please refer to FIG. 1 and FIG. 2, the lithium ion battery cell 1 includes a positive electrode The sheet m 'negative electrode sheet 104' is provided with a separator 106, a non-aqueous electrolyte solution, and an outer package structure 108. The outer package structure 108 encloses a positive electrode layer 2, a negative electrode sheet 1〇4, a separator 106, and a non-aqueous electrolyte solution. The sheet ι 2 is laminated with the negative electrode sheet 104 and spaced apart from each other by the separator 1 〇 6. The laminated 099116434
表單編號A010I 第4頁/共30頁 0992029220-0 201143190 正極片102、負極片1〇4及隔膜106相互貼合。可以理解 ，雖然圖1僅示出一正極片102及兩負極片ι〇4交疊的結構 ，該鋰離子電池單體1〇〇可包括複數正極片1〇2與複數負 極片104交替層疊設置’每兩個相鄰的正極片與負極片之 間具有一隔膜。該正極片1〇2、負極片1〇4的數量不限， 正極片102、負極片1〇4可以分別為1層〜10〇層或更多層 ，優選為20層〜50層。 [0011] ❹ ο 請參閱圖3，該正極片102包括一片狀的正極集流體U2及 形成於該正極集流體112與所述負極集流體114相對的表 面的正極材料層122。·該負把片:，1|)4包括一片狀的負極集 流體114及形成於該負極集流體114與所述正極集流體 112相對的表面的負極材料層124.〇優選地，該正極片 102具有兩個正極材料層122分別形成在該正極集流體 112兩個相對表面’該負極片1〇4具有兩個負極材料層 124分別形成在該負極集流體114兩個相對表面。將所述 正極片102與負極片1〇4層疊設置後，該正極材料層j 22 與負極材料層124藉由所述隔膜1〇6間隔，並與所述隔膜 106貼合設置。該正極集流體112還可具有一伸出正極材 料層122外部的正極耳13〇a。該負極集流體114還可具有 一伸出負極材料層！ 24外部的負極耳13〇b。該正極耳 130a、負極耳13〇b用於與鋰離子電池單體1〇〇外部的電 路電連接。當複數正極片102與複數負極片1〇4交替層疊 設置時，該複數正極集流體112的正極耳13肫相互重疊， 該複數負極集流體114的負極耳13〇b相互重疊，且該正極 集流體11 2的正極耳130a與該負極集流體114的負極耳 099116434 表單編號A0101 第5頁/共30頁 0992029220-0 201143190 13Ob分開設置。 [0012] [0013] 5哀正極片1〇2具有至少一第一通孔132，該負極片ι〇4具 有至少一與所述第一通孔132相對應的第二通孔134。該 第一通孔132與第二通孔134為電解液提供流通通道，使 正極片102、負極片1〇4表面的電解液能夠流入正極片 102、負極片1〇4之間。優選地，該正極片1〇2與負極片 104均具有複數基本均勻的分佈在正極片1〇2、負極片 104上的第一通孔132及第二通孔134。形成在正極片1〇2 上的第一通孔132使正極片1〇2兩個相對的表面連通，形 成在負極片104上的第二通孔134使負極片1 〇4兩個相對 的表面連通。可以理解，該第一通孔132及第二通孔134 的數量與正極片102、負極片1〇4的面積有關，當鋰離子 電池單體100較小時，如正極片102、負極片104的邊長 小於等於10厘米時，可僅在正極片1〇2的中心形成一第一 通孔132，並在負極片1〇4的中心形成一與第一通孔132 位置對應的第二通孔134。 . . .....丨：？」. 由於該正極片102、負極片104整體具有第一通孔132及 第一通孔134，該正極材料層122、正極集流體I!〗、負 極材料層124及負極集流體114亦具有通孔，且該正極材 料層122的通孔與正極集流體112的通孔邊緣對齊，該負 極材料層124的通孔與負極集流體U4的通孔邊緣對齊。 每個負極片104上的第二通孔134均與一個正極片1〇2上 的第一通孔132對應。亦即，正極片1〇2上的第一通孔 132的數量可以多於負極片i〇4的第二通孔134的數量。 優選地，第一通孔132及第二通孔134數量相等該第_ 099116434 表單編號A010】 第6頁/共30頁 0992029220-0 201143190 〇 [0014] 〇 通孔132與第二通孔134——對應。當將正極片102、負 極片104層疊設置後，該正極片1〇2、負極片1〇4的相互 對應的第一通孔132及第二通孔134的轴線基本對準。然 ，該正極片102、負極片104係先各自形成第一通孔132 及第二通孔134後，再與所述隔膜106裝配在一起的，故 設置於所述正極片102、負極片104之間的隔膜106為一 完整結構，並不具有類似於正極片102、負極片104的第 一通孔132及第二通孔134，從而防止正極片102、負極 片104之間的短路。 該正極片10 2、負極片10 4的第一通孔13|及第二通孔134 形狀不限、可為圓孔、方空、菱形孔、三角形孔、多邊 形孔或其組合。該正極片102、負極片104相對應的第一 通孔132及第二通孔134可以具有一致的形狀，如當正極 片102上的第一通孔132為圓孔時，與該第一通孔132對 應的負極片104的第二通孔134亦為圓孔。該每個第一通 孔132及第二通孔134的面積約為0. 001平方毫米~13平方 毫米，每個第一通孔132及第二通孔134的邊長或直徑約 為50微米~4毫米。優選地，該第一通孔132及第二通孔 134為直徑1毫米〜2毫米的圓孔。同一正極片102、負極 片104上相鄰的兩個第一通孔132及第二通孔134軸線之 間的間隔為1厘米〜50厘米，優選為5厘米。該複數第一通 孔132及第二通孔134可按行及列排列形成陣列，或以正 極片102、負極片1〇4的中心為圓心呈發散狀排列。該正 極片102、負極片1〇4的開孔率優選小於10%，更為優選 小於2%，如1%至11。較小的開孔率一方面可以確保正極 099116434 表單編號A0101 第7頁/共30頁 0992029220-0 201143190 集流體112、負極集流體114表面能夠擔載更多活性物質 ’避免影響電池容量；另一方面可以確保正極集流體112 、負極集流體114具有足夠的強度，不致由於擠壓而斷裂 〇 [0015] 請參閱圖4，該正極片1〇2的第一通孔132的尺寸可以大於 或等於所述負極片1〇4第二通孔134的尺寸。當該第一通 孔132、第二通孔134為圓形孔時，該第一通孔ι32的直 徑大於或等於第二通孔134的直徑。當該第一通孔丨32、 第二通孔134為矩形孔時，該第一通孔132的邊長大於或 等於第二通孔134的邊長。優選地，該正極片1〇2第一通 孔132的尺寸大於所述負極片j㈣第二通孔134，從而為 負極片104第二通孔134的位:置留有餘量，易於裝配。所 述正極片102、負極片1〇4平行設置，當正極片1〇2、負 極片104第一通孔132及第二通孔134的位置略有偏差而 非精確對準時，在垂直於所述正極片1〇2、負極片1〇4的 方向上，該正極片1〇2的第一通孔132包圍該負極片4 的第二通孔134，使負極片104的第二通孔134位於正極 片102的第一通孔132的範圍内，從而使整個正極片1〇2 的正極材料層122均對應有負極片104的負極材料層124 。由於正極材料層122含鋰，這種設置方式使從正極片 102到負極片1〇4的方向上，由於總有負極材料層124與 正極材料層122相對應，防止鋰離子直接以金屬鋰的形式 析出，提高電池的安全性。優選地，該正極片1〇2第一通 孔132的邊長或直徑為該負極片1〇4第二通孔134的邊長 或直徑的1. 5倍至2倍。本實施例中，該正極片1〇2第一通 099116434 表單編號A0I01 第8頁/共30頁 0992029220-0 201143190 孔132的邊長或直徑為2毫米，該負極片104第二通孔134 的邊長或直徑為1毫米。當該鋰離子電池單體1〇〇包括複 數正極片102及複數負極片1〇4相互交疊時，該複數正極 片102、負極片104中的第一通孔132及第二通孔134的軸 線均相互基本對準，或至少使所述負極片104的第二通孔 134能夠位於所述正極片1〇2的第一通孔132的範圍内。 優選地，該複數正極片102的第一通孔132與該複數負極 片104的第二通孔134— 一對應。Form No. A010I Page 4 of 30 0992029220-0 201143190 The positive electrode sheet 102, the negative electrode sheet 1〇4, and the separator 106 are bonded to each other. It can be understood that although FIG. 1 only shows a structure in which a positive electrode sheet 102 and two negative electrode sheets ι 4 overlap, the lithium ion battery cell 1 〇〇 may include a plurality of positive electrode sheets 1 〇 2 and a plurality of negative electrode sheets 104 alternately stacked. 'A diaphragm is provided between every two adjacent positive and negative electrode sheets. The number of the positive electrode sheets 1 2 and the negative electrode sheets 1 〇 4 is not limited, and the positive electrode sheets 102 and the negative electrode sheets 1 〇 4 may be one layer to 10 〇 layers or more, preferably 20 layers to 50 layers, respectively. Referring to FIG. 3, the positive electrode sheet 102 includes a sheet-shaped positive electrode current collector U2 and a positive electrode material layer 122 formed on a surface of the positive electrode current collector 112 opposite to the negative electrode current collector 114. The negative plate: 1, 1|) 4 includes a sheet-shaped negative electrode current collector 114 and a negative electrode material layer 124 formed on a surface of the negative electrode current collector 114 opposite to the positive electrode current collector 112. Preferably, the positive electrode The sheet 102 has two cathode material layers 122 respectively formed on two opposite surfaces of the cathode current collector 112. The anode sheet 1〇4 has two anode material layers 124 formed on the opposite surfaces of the anode current collector 114, respectively. After the positive electrode sheet 102 and the negative electrode sheet 1〇4 are laminated, the positive electrode material layer j 22 and the negative electrode material layer 124 are spaced apart from each other by the separator 1〇6, and are disposed in contact with the separator 106. The positive current collector 112 may also have a positive electrode tab 13a extending outside the positive electrode material layer 122. The negative current collector 114 can also have a layer of negative electrode material! 24 external negative ear 13〇b. The positive electrode tab 130a and the negative electrode tab 13b are for electrically connecting to a circuit external to the lithium ion battery cell 1 . When the plurality of positive electrode sheets 102 and the plurality of negative electrode sheets 1〇4 are alternately stacked, the positive electrode tabs 13 of the plurality of positive electrode current collectors 112 overlap each other, and the negative electrode tabs 13〇b of the plurality of negative electrode current collectors 114 overlap each other, and the positive electrode set The positive electrode tab 130a of the fluid 11 2 is separated from the negative electrode ear 099116434 of the negative current collector 114, Form No. A0101, Page 5 of 30, 0992029220-0, 201143190, 13Ob. [0013] The positive electrode sheet 1〇2 has at least one first through hole 132 having at least one second through hole 134 corresponding to the first through hole 132. The first through hole 132 and the second through hole 134 provide a flow passage for the electrolyte, so that the electrolyte on the surface of the positive electrode sheet 102 and the negative electrode sheet 1〇4 can flow between the positive electrode sheet 102 and the negative electrode sheet 1〇4. Preferably, the positive electrode tab 1 2 and the negative electrode tab 104 each have a plurality of first and second through holes 132 and 134 which are substantially uniformly distributed on the positive electrode tab 1 and the negative electrode tab 104. The first through holes 132 formed on the positive electrode tab 1〇2 communicate the two opposite surfaces of the positive electrode tab 1〇2, and the second through holes 134 formed in the negative electrode tab 104 make the opposite surfaces of the negative electrode tab 1〇4 Connected. It can be understood that the number of the first through holes 132 and the second through holes 134 is related to the area of the positive electrode sheet 102 and the negative electrode sheet 1〇4, and when the lithium ion battery cell 100 is small, such as the positive electrode sheet 102 and the negative electrode sheet 104. When the side length is less than or equal to 10 cm, a first through hole 132 may be formed only in the center of the positive electrode tab 1〇2, and a second pass corresponding to the position of the first through hole 132 may be formed in the center of the negative electrode tab 1〇4. Hole 134. . . ..丨丨:? The positive electrode material layer 122, the positive electrode current collector I, the negative electrode material layer 124, and the negative electrode current collector 114 also have a pass. The holes, and the through holes of the positive electrode material layer 122 are aligned with the through hole edges of the positive electrode current collector 112, and the through holes of the negative electrode material layer 124 are aligned with the through hole edges of the negative current collector U4. The second through holes 134 on each of the negative electrode tabs 104 correspond to the first through holes 132 on one of the positive electrode tabs 1''. That is, the number of the first through holes 132 on the positive electrode tab 1 2 may be larger than the number of the second through holes 134 of the negative electrode tab i 4 . Preferably, the first through hole 132 and the second through hole 134 are equal in number _ 099116434 Form No. A010] Page 6 / Total 30 Page 0992029220-0 201143190 〇 [0014] 〇 through hole 132 and second through hole 134 — -correspond. When the positive electrode tab 102 and the negative electrode tab 104 are laminated, the axes of the first and second through holes 132 and 134 of the positive electrode tab 1 and the negative electrode tab 1 are substantially aligned. The positive electrode sheet 102 and the negative electrode sheet 104 are first formed in the first through hole 132 and the second through hole 134, and then assembled to the separator 106, so that the positive electrode sheet 102 and the negative electrode sheet 104 are disposed on the positive electrode sheet 102 and the negative electrode sheet 104. The separator 106 is a complete structure and does not have the first through hole 132 and the second through hole 134 similar to the positive electrode sheet 102 and the negative electrode sheet 104, thereby preventing short circuit between the positive electrode sheet 102 and the negative electrode sheet 104. The first through hole 13| and the second through hole 134 of the positive electrode tab 12 and the negative electrode tab 104 are not limited in shape, and may be a circular hole, a square hollow, a rhombic hole, a triangular hole, a polygonal hole or a combination thereof. The first through hole 132 and the second through hole 134 corresponding to the positive electrode tab 102 and the negative electrode tab 104 may have a uniform shape, such as when the first through hole 132 on the positive electrode tab 102 is a circular hole, and the first pass The second through hole 134 of the negative electrode tab 104 corresponding to the hole 132 is also a circular hole. The area of each of the first through holes 132 and the second through holes 134 is about 0.001 square millimeters to 13 square millimeters, and the length or diameter of each of the first through holes 132 and the second through holes 134 is about 50 micrometers. ~4 mm. Preferably, the first through hole 132 and the second through hole 134 are circular holes having a diameter of 1 mm to 2 mm. The interval between the axes of the two adjacent first through holes 132 and the second through holes 134 on the same positive electrode sheet 102 and the negative electrode sheet 104 is 1 cm to 50 cm, preferably 5 cm. The plurality of first through holes 132 and the second through holes 134 may be arranged in an array in rows and columns, or may be arranged in a divergent manner centered on the centers of the positive electrode sheets 102 and the negative electrode sheets 1〇4. The opening ratio of the positive electrode sheet 102 and the negative electrode sheet 1〇4 is preferably less than 10%, more preferably less than 2%, such as 1% to 11. The smaller opening ratio on the one hand ensures positive 099116434 Form No. A0101 Page 7 / Total 30 Page 0992029220-0 201143190 Current collector 112, anode current collector 114 surface can carry more active material 'avoid affecting battery capacity; another The aspect can ensure that the positive current collector 112 and the negative current collector 114 have sufficient strength so as not to be broken due to extrusion. [0015] Referring to FIG. 4, the size of the first through hole 132 of the positive electrode tab 1 2 may be greater than or equal to The size of the second through hole 134 of the negative electrode tab 1〇4. When the first through hole 132 and the second through hole 134 are circular holes, the diameter of the first through hole ι32 is greater than or equal to the diameter of the second through hole 134. When the first through hole 32 and the second through hole 134 are rectangular holes, the side length of the first through hole 132 is greater than or equal to the side length of the second through hole 134. Preferably, the size of the first through hole 132 of the positive electrode tab 1 2 is larger than the second through hole 134 of the negative electrode sheet j (four), so that the position of the second through hole 134 of the negative electrode sheet 104 is reserved with a margin for easy assembly. The positive electrode sheet 102 and the negative electrode sheet 1〇4 are arranged in parallel. When the positions of the positive electrode sheet 1 and the second through hole 132 and the second through hole 134 of the negative electrode sheet 104 are slightly deviated rather than precisely aligned, perpendicular to the In the direction of the positive electrode tab 1 and the negative electrode tab 1〇4, the first through hole 132 of the positive electrode tab 1〇2 surrounds the second through hole 134 of the negative electrode tab 4, and the second through hole 134 of the negative electrode tab 104 is formed. It is located in the range of the first through holes 132 of the positive electrode sheets 102 such that the positive electrode material layers 122 of the entire positive electrode sheets 1〇2 correspond to the negative electrode material layers 124 of the negative electrode sheets 104. Since the positive electrode material layer 122 contains lithium, this arrangement is such that from the positive electrode sheet 102 to the negative electrode sheet 1〇4, since the negative electrode material layer 124 always corresponds to the positive electrode material layer 122, lithium ions are directly prevented from being metallic lithium. Forms are precipitated to improve battery safety. 5倍至倍倍。 The side of the first through hole 132 of the positive electrode sheet 1 〇 2 the length or diameter of the second through hole 134 of the negative electrode sheet 134. In this embodiment, the positive electrode piece 1〇2 first pass 099116434 form number A0I01 page 8 / total 30 page 0992029220-0 201143190 hole 132 has a side length or diameter of 2 mm, the negative electrode piece 104 of the second through hole 134 Side length or diameter is 1 mm. When the lithium ion battery cell 1 〇〇 includes the plurality of positive electrode sheets 102 and the plurality of negative electrode sheets 1 〇 4 overlap each other, the plurality of positive electrode sheets 102 , the first through holes 132 and the second through holes 134 of the negative electrode sheet 104 The axes are all substantially aligned with each other, or at least the second through holes 134 of the negative electrode tab 104 can be located within the range of the first through holes 132 of the positive electrode tab 1〇2. Preferably, the first through holes 132 of the plurality of positive electrode tabs 102 are in one-to-one correspondence with the second through holes 134 of the plurality of negative electrode tabs 104.
[⑻16]該正極集流體112、負極集流體114為金屬箱片該正極 集流體112可為銘落或鈦猪，該負極集流體114可為銅羯 或㈣。該正極錢體112、負極集_114的厚度^微 米~200微米。該正極材料層122包括均勾混和的正極活性 物質、導電劑及黏結劑。該負極材料層124包括均勾混合 的負極活性物質、導電劑及黏結劑。該正極活性物質可 為猛酸裡、鈷_、錄酸㈣錢鐵料，該負極活性 物質可為天然石墨、有機裂解碳或中間相碳微球（MCMB) 等’該導電劑可為么炔黑或，維等，該黏結劑可為聚 偏氟乙烯（PVDF)或聚四氟乙烯印打以等。可以理解，該 正極活性物質、負極活性物質、導電劑及黏結劑亦可採 用其他常用的材料。該正極片1〇2的整體厚度約為1〇〇微 米~300微米’優選為200微米。該負極片1〇4的整趙厚度 約為50微米〜200微米，優選為微米。 [0017] 所述隔膜1G6可為聚丙烯微孔性膜，所述電解液中的電解 質發可為六氟猶鐘、四__或雙草酸蝴酸鐘等， 所述電解液中的有機溶劑可為錢乙烯醋、魏二乙醋 099116434 表單碥號第9頁/共30頁 0992029220-0 201143190 或碳酸二曱酯等。可以理解，所述隔膜1 0 6和電解液亦可 採用其他常用的材料。另，所述電解液可以用固體電解 質膜或離子液體取代，當該鋰離子電池組具有固體電解 質膜時，該固體電解質膜進一步取代所述隔膜106，設置 在所述正極材料層122與負極材料層124之間。 [0018] 所述外部封裝結構108可為硬質電池殼或軟封裝袋。所述 130暴露於所述外部封裝結構108之外，從而實現鋰離子 電池單體100與外部電路的電連接。 [0019] 實施例1 [0020] 請參閱圖5及圖6，本實施例提供一鋰離子電池組10，其 包括複數相互串聯的鋰離子電池單體100。該每個鋰離子 電池單體100可進一步包括一正極接線柱12及一負極接線 柱14。該正極接線柱12與鋰離子電池單體100的所有正極 耳130a電連接，該負極接線柱14與鋰離子電池單體100 的所有負極耳130b電連接。該複數鋰雜子電池單體100可 相互層疊設置，並使複數鋰離子電池單體100的正極接線 柱12及負極接線柱14相互交錯排列，使一個鋰離子電池 單體100的正極接線柱12與另一個鋰離子電池單體100的 負極接線柱14靠近，以利於鋰離子電池單體100之間的串 聯。 [0021] 該鋰離子電池組10可進一步包括複數連接片16及一電池 緊固裝置18。該連接片16將一個鋰離子電池單體100的正 極接線柱12與相鄰的鋰離子電池單體100的負極接線柱14 電連接。該電池緊固裝置18用於固定所述鋰離子電池單 099116434 表單編號A0101 第10頁/共30頁 0992029220-0 201143190 體100，設置在該複數層疊在一起的鋰離子電池單體100 的週邊和底端，從而使鋰離子電池單體100之間不致發生 移動和錯位。 [0022] 該複數鋰離子電池單體100的數量不限，本實施例為將3 個鋰離子電池單體100相互串聯組成該鋰離子電池組10。 藉由將鋰離子電池單體100串聯可提高鋰離子電池組10的 總電壓。當鋰離子電池單體100的工作電壓為，串聯後 得到的裡離子電池組10的工作電壓VzV/n。其中η為链離 〇 [0023] 子電池組10中鋰離子電池單體100的數量。 實施例2 [0024] 〇 請參閱圖7及圖8，本實施例提供一鋰離子電池組20，其 包括複數相互並聯的鋰離子電池單體100、複數連接片16 及一電池緊固裝置18。該每個鋰離子電池單體100進一步 包括一正極接線柱12及一負極接線柱14。本實施例2中的 鋰離子電池組20與實施例1的鋰離子電池組10結構基本相 同，其區別在於在該鋰離子電池組20中，所有鋰離子電 池單體100的正極接線柱12相靠近，所有鋰離子電池單體 100的負極接線柱14相靠近，以利於鋰離子電池單體100 之間的並聯。 [0025] 該複數鋰離子電池單體100的數量不限，本實施例為將3 個鋰離子電池單體100相互並聯組成該鋰離子電池組20。 藉由將鋰離子電池單體100並聯可提高鋰離子電池組20的 總容量。當鋰離子電池單體100的容量為h，並聯後得到 的鋰離子電池組20的總容量C=C„xn。其中η為鋰離子電池 099116434 表單編號A0101 第11頁/共30頁 0992029220-0 201143190 組20中鋰離子電池單體1〇〇的數量。 [0026] [0027] [0028] 實施例3 請參閱圖9及圖10，本實施例提供一鐘離子電池㈣，其 包括相互並聯_個單元，每個單元包括數量相等的η個 相互串聯的链離子電池單體刚、複數連接片财一電池 緊固裝置18。該每個n離子電池單體⑽進—步包括一正 極接線柱12及-負極接線柱14。本實施例中的㈣子電 池組30與實施例1的鋰離子電池組1〇結構基本相同，其區 別在於’在每個單元卜個轉子靠單㈣㈣正極接 線柱12與另-個鐘離子電池單則〇的負極接線柱14靠近 ’以便於實現單元内部的轉子電池單體1QQ之間的串聯 ，而複數單元之間的正極接線柱12相靠近，以便於實現 複數單元之間的並聯。 該複數鋰離子電池單體100的數量不限，本實施例為相互 並聯的2個單元，每個單元具有3俩相.串聯的鋰離子電 池單體100。藉由將鋰離子電池單體1〇〇串聯及並聯可提 高鋰離子電池組30的總容查及總電壓。當鋰離子電池單 體100的容量為C〇，工作電壓為、，串並聯後得到的鋰離 子電池組30的總容量C = CGxin，總電壓為ν = ναχη。其中m 為鐘離子電池組3〇中並聯的單元的數量，n為一個單元中 鋰離子電池單體1〇〇的數量。 可以理解，所述鋰離子電池組中複數鋰離子電池單體1〇〇 之間的電連接方式不限前述實施例1 _ 3中的連接方式。如 ’可以將複數鋰離子電池單體1〇〇先並聯組成複數單元， 099116434 表單編號A0101 第12頁/共30頁 0992029220-0 [0029] 201143190 再將該複數單元進行串聯，組成該鋰離子電池組。另， 該鋰離子電池組内部還可連接有其他電路元件，如電容 、電阻、電感等。 [0030]纟發明實施例鐘離子電池組中—個經離子電池單體⑽的 製備方法主要包括以下幾個步驟： _] #驟一’提供正極集流體112及負極集流體⑴； [酬㈣―’分別於該正極集流體112及負極集流體114表面 均勻塗佈正極材料層122及負極材料層124，形成正極片 102及負極片1〇4; ......- . :...++ ；.：. 圆纟驟二’於正極片m及負極片1()4上形成位置對應的第 一通孔132及第二通孔134 ;及 [0034] 步驟四，將正極片1〇2及負極片1〇4封裝至一外部封裝結 構1 0 8中。 [0035] 於前述步驟二中，可藉由塗膜機對所述正極集流體112、 負極集流體114進行塗膜。具體地，先將正極活性物質及 負極活性物質分別與導電劑及黏結劑溶液混合，形成正 極漿料及負極漿料，再藉由塗膜機將正、負極漿料分別 塗佈於正極集流體1丨2、負極集流體114表面並乾燥，形 成正極材料層122、負極材料層124 ^進一步地，可藉由 壓膜機對塗佈的正極材料層122、負極材料層124進行壓 [0036] 於前述步驟三中，所述形成第一通孔132及第二通孔134 的方法可以採用衝壓法或雷射蝕刻法等方法。藉由雷射 099116434 表單編號A0101 第13頁/共30頁 0992029220-0 201143190 蝕刻法可形成尺寸較小的第一通孔132及第二通孔ι34。 所述第一通孔132及第二通孔134係於形成正極材料層 122、負極材料層！ 24之後形成的，從而避免先單獨對正 極集流體112、負極集流體114開孔後再進行塗佈時產生 的漿料滲漏或黏連使第一通孔132及第二通孔134堵塞的 情況。所述第一通孔132及第二通孔134係形成於正極片 102、負極片1〇4對應的位置，具體地，可藉由定位裝置 將大小相等的正極片102、負極片j 〇4固定，並於相同的 位置進行打孔。 [0037] [0038] [0039] [0040] 當所述鋰離子電池組採用電解液或離子液體時，前述步 驟四可進一步包括： (1) 提供隔膜106，將正極片102與負極片104分別設置 於所述隔膜106兩侧並壓合；及 (2) 藉由所述第一通孔132及第二通孔134向正極片1〇2 及負極片104間注入電解液或離子液體，並將所述正極片 102、負極片1〇4、隔膜106及電解液或離子液體封裴於 所述外部封裝結構108中。 於前述步驟（1)中，可先將所述隔膜106鋪設於正極片 102表面，再將所述負極片1〇4覆蓋於隔膜106之上，於 裝配的過程中，應藉由定位裝置使正極片102上的第一通 孔132與負極片1〇4上的第二通孔134儘量對準。當所述 鋰離子電池包括複數正極片102及複數負極片104時，可 反復多次的依次層疊所述正極片102、隔膜106及負極片 104，形成多層結構。層疊後的正極片102、負極片104 099116434 表單編號A0101 第14頁/共30頁 0992029220-0 201143190 [0041][(8)16] The positive current collector 112 and the negative current collector 114 are metal box sheets. The positive current collector 112 may be a diamond or titanium pig, and the negative current collector 114 may be copper or (4). The thickness of the positive electrode body 112 and the negative electrode set _114 is from micrometers to 200 micrometers. The positive electrode material layer 122 includes a positive electrode active material, a conductive agent, and a binder which are uniformly mixed. The negative electrode material layer 124 includes a negative electrode active material, a conductive agent, and a binder which are uniformly mixed. The positive active material may be a sulphuric acid, a cobalt _, a liquid acid (four) iron iron material, and the negative electrode active material may be natural graphite, organic cracked carbon or mesocarbon microbeads (MCMB), etc. Black or the like, the binder may be printed on polyvinylidene fluoride (PVDF) or polytetrafluoroethylene. It is to be understood that the positive electrode active material, the negative electrode active material, the conductive agent and the binder may be other commonly used materials. The positive electrode sheet 1 2 has an overall thickness of about 1 μm to 300 μm, preferably 200 μm. The negative electrode sheet 1〇4 has a thickness of about 50 μm to 200 μm, preferably micrometer. [0017] The separator 1G6 may be a polypropylene microporous membrane, and the electrolyte in the electrolyte may be a hexafluoride, a tetra- or a bis-oxalic acid clock, or the like, and an organic solvent in the electrolyte. Can be money vinyl vinegar, Wei diethyl vinegar 099116434 form nickname page 9 / total 30 pages 0992029220-0 201143190 or dinonyl carbonate. It will be appreciated that the separator 106 and the electrolyte may be of other conventional materials. In addition, the electrolyte may be replaced by a solid electrolyte membrane or an ionic liquid. When the lithium ion battery has a solid electrolyte membrane, the solid electrolyte membrane further replaces the separator 106, and is disposed on the cathode material layer 122 and the anode material. Between layers 124. [0018] The outer package structure 108 may be a hard battery case or a soft package bag. The 130 is exposed outside of the outer package structure 108 to effect electrical connection of the lithium ion battery cell 100 to an external circuit. [0019] Referring to FIG. 5 and FIG. 6, the present embodiment provides a lithium ion battery pack 10 including a plurality of lithium ion battery cells 100 connected in series with each other. Each of the lithium ion battery cells 100 may further include a positive terminal 12 and a negative terminal 14. The positive terminal 12 is electrically connected to all of the positive electrodes 130a of the lithium ion battery cell 100, and the negative terminal 14 is electrically connected to all of the negative electrodes 130b of the lithium ion battery cell 100. The plurality of lithium hetero battery cells 100 can be stacked on each other, and the positive electrode terminal 12 and the negative electrode terminal 14 of the plurality of lithium ion battery cells 100 are alternately arranged to each other to form a positive terminal 12 of a lithium ion battery cell 100. It is adjacent to the negative terminal 14 of another lithium ion battery cell 100 to facilitate the series connection between the lithium ion battery cells 100. [0021] The lithium ion battery pack 10 may further include a plurality of connecting pieces 16 and a battery fastening device 18. The tab 16 electrically connects the positive terminal 12 of a lithium ion battery cell 100 to the negative terminal 14 of an adjacent lithium ion battery cell 100. The battery fastening device 18 is configured to fix the lithium ion battery single 099116434 form number A0101 page 10 / total 30 page 0992029220-0 201143190 body 100, disposed at the periphery of the plurality of lithium ion battery cells 100 stacked together and The bottom end is such that no movement or misalignment occurs between the lithium ion battery cells 100. [0022] The number of the plurality of lithium ion battery cells 100 is not limited. In this embodiment, three lithium ion battery cells 100 are connected in series to each other to form the lithium ion battery pack 10. The total voltage of the lithium ion battery pack 10 can be increased by connecting the lithium ion battery cells 100 in series. When the operating voltage of the lithium ion battery cell 100 is the operating voltage VzV/n of the inner ion battery 10 obtained in series. Where η is the chain 〇 [0023] The number of lithium ion battery cells 100 in the sub-battery 10. Embodiment 2 [0024] Referring to FIG. 7 and FIG. 8, this embodiment provides a lithium ion battery pack 20 including a plurality of lithium ion battery cells 100, a plurality of connecting pieces 16 and a battery fastening device 18 connected in parallel with each other. . Each of the lithium ion battery cells 100 further includes a positive terminal 12 and a negative terminal 14. The lithium ion battery pack 20 of the second embodiment has substantially the same structure as the lithium ion battery pack 10 of the first embodiment, except that in the lithium ion battery pack 20, the positive terminal posts 12 of all the lithium ion battery cells 100 are identical. Nearly, the negative terminal 14 of all the lithium ion battery cells 100 are close to each other to facilitate parallel connection between the lithium ion battery cells 100. [0025] The number of the plurality of lithium ion battery cells 100 is not limited. In this embodiment, three lithium ion battery cells 100 are connected in parallel to each other to form the lithium ion battery pack 20. The total capacity of the lithium ion battery pack 20 can be increased by connecting the lithium ion battery cells 100 in parallel. When the capacity of the lithium ion battery cell 100 is h, the total capacity of the lithium ion battery 20 obtained in parallel is C=C„xn, where η is a lithium ion battery 099116434 Form No. A0101 Page 11 / Total 30 Page 0992029220-0 201143190 The number of lithium ion battery cells in Group 20 is the same as that of [0028] [0028] Embodiment 3 Referring to FIG. 9 and FIG. 10, the present embodiment provides a clock ion battery (4) including parallel to each other_ Units, each unit comprising an equal number of n series-connected chain ion battery cells, a plurality of connection cells, a battery fastening device 18. Each of the n-ion battery cells (10) further includes a positive terminal 12 and - negative terminal 14. The (four) sub-battery 30 in this embodiment has substantially the same structure as the lithium ion battery of the first embodiment, and the difference is that 'in each unit, the rotor is single (four) (four) positive terminal. 12 is close to the negative terminal 14 of another single ion battery, so that the series connection between the rotor cells 1QQ inside the unit is realized, and the positive terminal 12 between the plurality of units is close to each other. Between plural units The number of the plurality of lithium ion battery cells 100 is not limited. In this embodiment, two cells are connected in parallel with each other, and each cell has three phases and a series of lithium ion battery cells 100. By using a lithium ion battery cell 1〇〇 series and parallel can improve the total capacitance and total voltage of the lithium ion battery pack 30. When the capacity of the lithium ion battery cell 100 is C〇, the working voltage is , and the lithium ion battery pack 30 obtained after series and parallel connection The total capacity is C = CGxin, and the total voltage is ν = ναχη, where m is the number of cells connected in parallel in the cell, and n is the number of lithium-ion cells in a cell. The electrical connection between the plurality of lithium ion battery cells in the lithium ion battery pack is not limited to the connection mode in the foregoing embodiment 1 _ 3. For example, the plural lithium ion battery cells can be connected in parallel to form a plurality of Unit, 099116434 Form No. A0101 Page 12/Total 30 Page 0992029220-0 [0029] 201143190 The multiple units are connected in series to form the lithium ion battery pack. In addition, other circuit components can be connected inside the lithium ion battery pack. , Capacitor, Resistor, Inductance, etc. [0030] In the clock cell of the invention, the method for preparing the ion battery cell (10) mainly comprises the following steps: _] #骤一' provides a cathode current collector 112 and a cathode The current collector (1); [receiving (four) - 'the positive electrode current collector 112 and the negative electrode current layer 114 are uniformly coated on the surface of the positive electrode material layer 122 and the negative electrode material layer 124, forming a positive electrode sheet 102 and a negative electrode sheet 1 〇 4; ..-. :...++ ;.:. The second through hole 132 and the second through hole 134 corresponding to the position on the positive electrode sheet m and the negative electrode sheet 1 () 4; and [0034] Step 4, the positive electrode tab 1〇2 and the negative electrode tab 1〇4 are packaged into an external package structure 108. [0035] In the foregoing step two, the cathode current collector 112 and the anode current collector 114 may be coated by a coater. Specifically, the positive electrode active material and the negative electrode active material are separately mixed with the conductive agent and the binder solution to form a positive electrode slurry and a negative electrode slurry, and the positive and negative electrode pastes are respectively applied to the positive electrode current collector by a coater. 1丨2, the surface of the anode current collector 114 is dried and formed to form a positive electrode material layer 122 and a negative electrode material layer 124. Further, the coated positive electrode material layer 122 and the negative electrode material layer 124 may be pressed by a laminator [0036] In the foregoing step three, the method of forming the first through hole 132 and the second through hole 134 may be a method such as a stamping method or a laser etching method. By laser 099116434 Form No. A0101 Page 13 of 30 0992029220-0 201143190 The etching method can form the first through hole 132 and the second through hole ι34 which are smaller in size. The first through hole 132 and the second through hole 134 are formed in the positive electrode material layer 122 and the negative electrode material layer! Formed after 24, thereby avoiding leakage or adhesion of the slurry generated when the positive electrode current collector 112 and the negative electrode current collector 114 are separately opened and then coated to block the first through hole 132 and the second through hole 134. Happening. The first through hole 132 and the second through hole 134 are formed at positions corresponding to the positive electrode tab 102 and the negative electrode tab 1〇4. Specifically, the positive electrode tab 102 and the negative electrode tab j 〇4 having the same size can be disposed by the positioning device. Fixed and punched in the same position. [0040] [0040] When the lithium ion battery pack uses an electrolyte or an ionic liquid, the foregoing step 4 may further include: (1) providing a separator 106, respectively, the positive electrode sheet 102 and the negative electrode sheet 104 And being pressed on both sides of the separator 106; and (2) injecting an electrolyte or an ionic liquid into the positive electrode sheet 1〇2 and the negative electrode sheet 104 through the first through hole 132 and the second through hole 134, and The positive electrode sheet 102, the negative electrode sheet 1〇4, the separator 106, and the electrolyte or ionic liquid are sealed in the outer package structure 108. In the foregoing step (1), the separator 106 may be first laid on the surface of the positive electrode sheet 102, and then the negative electrode sheet 1〇4 is covered on the separator 106. During the assembly process, the positioning device should be used. The first through holes 132 on the positive electrode tab 102 are aligned with the second through holes 134 on the negative electrode tab 1〇4 as much as possible. When the lithium ion battery includes the plurality of positive electrode sheets 102 and the plurality of negative electrode sheets 104, the positive electrode sheets 102, the separators 106, and the negative electrode sheets 104 may be laminated in this order repeatedly to form a multilayer structure. The laminated positive electrode sheet 102 and the negative electrode sheet 104 099116434 Form No. A0101 Page 14 of 30 0992029220-0 201143190 [0041]
[0042] [0043] ❹ [0044] 及隔膜106可藉由壓膜機相互壓緊。 於前述步驟（2)中，所述電解液藉由所述通孔注入正極 片102、負極片104之間。由於所述正極片1〇2及負極片 1〇4具有第一通孔132及第二通孔134，藉由所述第一通 孔132及第二通孔134 ’電解液可快速地流入正極片1〇2 與負極片104之間，迅速浸潤整個正極片102、負極片 1〇4及隔膜1〇6，提高了鋰離子電池組的生產效率。所述 正極片102及負極片104的面積越大，尤其於動力大電池 中，從通孔處注入電解液的效暴越明顯。優選地，該正 極片102及負極片104的面積可大於400平方厘米。當該 正極片102及負極片104為矩形時，該正極片1〇2及負極 片104的邊長可大於20厘米，優選為50厘米〜1〇〇厘米。 當所述鋰離子電池單體1〇〇採用固體電解質時，可直接將 固體電解質膜代替所述隔膜106設置於正極片1〇2及負極 片1 〇 4之間》 所述鋰離子電池組於使用時，由於所述正極片1〇2及負極 片104具有第一通孔132及第二通孔134，使於正極片1〇2 及負極片104間電解液或其他物質分解產生的氣體能夠容 易的排出。 綜上所述，本發明確已符合發明專利之要件，遂依法提 出專利申請。惟，以上所述者僅為本發明之較佳實施例 ’自不能以此限制本案之申請專利範圍。舉凡習知本案 技藝之人士援依本發明之精神所作之等效修飾或變化， 皆應涵蓋於以下申請專利範圍内。 099116434 表單編號A0101 第15頁/共30頁 0992029220-0 201143190 【圖式簡單說明】 [0045] 圖1為本發明實施例鋰離子電池組的一個電池單體的外部 結構示意圖。 [0046] 圖2為本發明實施例鋰離子電池組的一個電池單體的内部 結構示意圖。 [0047] 圖3為圖2中的電池單體沿I I I - II I線的剖視示意圖。 [0048] 圖4為正極片的通孔與負極片的通孔的配合示意圖。 [0049] 圖5為本發明實施例1鋰離子電池組複數電池單體的連接 電路圖。 [0050] 圖6為本發明實施例1鋰離子電池組複數電池單體的結構 配合示意圖。 [0051] 圖7為本發明實施例2鋰離子電池組複數電池單體的連接 電路圖。 [0052] 圖8為本發明實施例2鋰離子電池組複數電池單體的結構 配合示意圖。 [0053] 圖9為本發明實施例3鋰離子電池組複數電池單體的連接 電路圖。 [0054] 圖10為本發明實施例3鋰離子電池組複數電池單體的結構 配合示意圖。 【主要元件符號說明】 [0055] 鋰離子電池組：10，20，30 [0056] 正極接線柱：12 099116434 表單編號A0101 第16頁/共30頁 0992029220-0 201143190 [0057] 負極接線柱：14 [0058] 連接片：16 [0059] 電池緊固裝置：1 8 [0060] 鋰離子電池單體：100 [0061] 正極片：102 [0062] 負極片：104 [0063] ❹ [0064] 隔膜：106 外部封裝結構：108 [0065] 正極集流體：112 ~ [0066] 正極材料層：122 ' [0067] 負極集流體：114 [0068] 負極材料層：124 [0069] 正極耳：130a [0070] 負極耳：130b [0071] 第一通孔：132 [0072] 第二通孔：134 099116434 表單編號A0101 第17頁/共30頁 0992029220-0[0044] The diaphragm [0044] and the diaphragm 106 can be pressed against each other by a laminator. In the foregoing step (2), the electrolyte is injected between the positive electrode tab 102 and the negative electrode tab 104 through the through holes. Since the positive electrode tab 1〇2 and the negative electrode tab 1〇4 have a first through hole 132 and a second through hole 134, the electrolyte can quickly flow into the positive electrode through the first through hole 132 and the second through hole 134′ Between the sheet 1〇2 and the negative electrode sheet 104, the entire positive electrode sheet 102, the negative electrode sheet 1〇4, and the separator 1〇6 are quickly wetted, which improves the production efficiency of the lithium ion battery pack. The larger the area of the positive electrode tab 102 and the negative electrode tab 104, especially in a large power battery, the more effective the effect of injecting the electrolyte from the through hole. Preferably, the positive electrode tab 102 and the negative electrode tab 104 may have an area greater than 400 square centimeters. When the positive electrode tab 102 and the negative electrode tab 104 are rectangular, the side length of the positive electrode tab 1 2 and the negative electrode tab 104 may be greater than 20 cm, preferably 50 cm to 1 cm. When the lithium ion battery cell 1〇〇 adopts a solid electrolyte, the solid electrolyte membrane may be directly disposed between the positive electrode sheet 1〇2 and the negative electrode sheet 1〇4 instead of the separator 106”. The lithium ion battery pack is In the use, the positive electrode sheet 1〇2 and the negative electrode sheet 104 have the first through hole 132 and the second through hole 134, so that the gas generated by the decomposition of the electrolyte or other substances between the positive electrode sheet 1〇2 and the negative electrode sheet 104 can Easy to discharge. In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the patent application of the present invention is not limited thereto. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. 099116434 Form No. A0101 Page 15 of 30 0992029220-0 201143190 [Simplified Schematic] FIG. 1 is a schematic diagram showing the external structure of a battery cell of a lithium ion battery pack according to an embodiment of the present invention. 2 is a schematic view showing the internal structure of a battery cell of a lithium ion battery pack according to an embodiment of the present invention. 3 is a cross-sectional view of the battery cell of FIG. 2 taken along line I I I - II I. 4 is a schematic view showing the cooperation of the through holes of the positive electrode tab and the through holes of the negative electrode tab. 5 is a connection circuit diagram of a plurality of battery cells of a lithium ion battery pack according to Embodiment 1 of the present invention. 6 is a schematic view showing the structure of a plurality of battery cells of a lithium ion battery pack according to Embodiment 1 of the present invention. 7 is a connection circuit diagram of a plurality of battery cells of a lithium ion battery pack according to Embodiment 2 of the present invention. 8 is a schematic view showing the structure of a plurality of battery cells of a lithium ion battery pack according to Embodiment 2 of the present invention. 9 is a connection circuit diagram of a plurality of battery cells of a lithium ion battery pack according to Embodiment 3 of the present invention. 10 is a schematic view showing the structure of a plurality of battery cells of a lithium ion battery pack according to Embodiment 3 of the present invention. [Main component symbol description] [0055] Lithium-ion battery pack: 10, 20, 30 [0056] Positive terminal: 12 099116434 Form number A0101 Page 16 / Total 30 page 0992029220-0 201143190 [0057] Negative terminal: 14 [0058] Connecting piece: 16 [0059] Battery fastening device: 1 8 [0060] Lithium ion battery cell: 100 [0061] Positive electrode sheet: 102 [0062] Negative electrode sheet: 104 [0063] ❹ [0064] Separator: 106 External package structure: 108 [0065] Positive current collector: 112 ~ [0066] Positive material layer: 122 ' [0067] Anode current collector: 114 [0068] Anode material layer: 124 [0069] Positive electrode: 130a [0070] Negative electrode ear: 130b [0071] First through hole: 132 [0072] Second through hole: 134 099116434 Form number A0101 Page 17 / Total 30 page 0992029220-0