508859 A7 B7 五、發明説明（/ ) 【發明背景】 a. 發明領域： 本發明有關一種方型二次鋰離子電池之安全保護結 構，尤指一種在端蓋板下方加裝一片金屬導電片，使延伸到 電池罐體側向豎立面而不接觸，在電池受到撞擊（Impact) 或壓扁（crash)變形時，即形成正負極短路，使短路電阻下 降，短路電流平均分佈於全極片，大幅降低局部高熱可能性， 以達安全之結構者。 b. 先前技術： 按，二次鋰離子電池具高能量密度、高輸出功率，可快 速充電，以及無污染之特性，已為輕薄短小之可攜式電子或 通訊產品，不可或缺之配備；但由於電池經過多次之充放電 後，會因鋰金屬樹枝化，刺穿極捲中正、負極之隔離膜造成 內部短路，於是將產生使用安全之問題；而傳統鋰電池之安 全設計，不外乎個別之限流、斷電以及釋氣等三種方式，其 中，限流之設計係採用PTC(註：PTC是正溫度係數電阻 Positive Temper atrue Coefficient of Re sis ti vity 的簡 稱）來阻止高電流之流動，是屬於非破壞性之安全設計；而 斷電方式是當電池內壓增大時，能使電池內部電路之可導 電易碎物品碎製，達到斷流之作用；再者，釋氣方式則是當 電池內壓增大時，使安全膜被頂針刺穿，由氣孔將氣體釋出 或開閥方式洩壓，以避免電池爆炸。 惟，以上主要係針對電池內壓不正常升高時，所採用之 _；_第3頁 _ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） (請先閱讀背如之注意r項再填· .裝· 線· 經濟部智慧財產局員工消費合作社印製 508859 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（2 ) 安全保護手段，此類型專利見諸國內公告第377045號、第 364666號，以及美國專利第4,238,812號及4,25 5·，688 號……等專利案中，但對於電池受到外部壓力而變形時之 安全保護，則付之闕如；由於電池罐體外部到撞擊壓力後會 變形，此如一來，易發生局部過熱，在極捲內部短路產生火 花、燒焦、噴煙等情形，而有安全之虞。 是以，針對電池受壓變形時，設計必要之安全保護結構， 為本發明所欲解決之課題。 【發明目的】 本發明之主要目的，係在提供一種方型電池之安全保 護結構，其具有當罐體側向受撞擊（Impact)或壓扁（Crash) 日寺，可避免極捲內部短路、燒焦、噴煙等情形，以達安全之 功效增進者。 為達上述目的，本發明係在電池端蓋板下方加裝一片 金屬導電片，使延伸到電池罐體側向豎立面而不接觸，藉長 度控制可避免電池無變形情況下短路之可能性，並使電池 受壓變形時，即在導電片與罐體側邊形成短路者。 【附圖之簡單說明】 a.圖式說明： 第一圖係本發明之立體外觀圖。 第二圖係本發明之結構剖示圖。 第三圖係第二圖中A部之放大示意圖。 第四圖係本發明受到撞擊變形時之示意圖。 笛4苜 本紙張尺度適用中國國家標準（CNS ) Λ4規格（210X 297公釐）508859 A7 B7 V. Description of the invention (/) [Background of the invention] a. Field of the invention: The present invention relates to a square lithium secondary battery safety protection structure, especially a metal conductive sheet under the end cover, Make the battery can extend to the side vertical surface of the battery body without contact. When the battery is deformed by impact or crash, it will form a positive and negative short circuit, which will reduce the short-circuit resistance, and the short-circuit current will be evenly distributed on the all-electrode plate. Those who greatly reduce the possibility of local high heat to achieve a safe structure. b. Previous technology: According to the characteristics of secondary lithium-ion batteries with high energy density, high output power, fast charging, and pollution-free, they are already light and thin portable electronic or communication products, an indispensable feature; However, after repeated charging and discharging of the battery, lithium metal dendrites will pierce the positive and negative separators in the electrode coil and cause an internal short circuit, which will cause safety problems. The safety design of traditional lithium batteries is nothing more than There are three ways of current limiting, power off and gas release. Among them, the design of current limiting uses PTC (Note: PTC is the abbreviation of Positive Temper atrue Coefficient of Resis ti vity) to prevent the flow of high current. It is a non-destructive safety design; when the internal pressure of the battery increases, the conductive and fragile items in the internal circuit of the battery can be broken to achieve the function of interrupting the current; in addition, the gas release method is When the internal pressure of the battery increases, the safety membrane is pierced by the thimble, and the gas is released through the air hole or the valve is opened to relieve the pressure to prevent the battery from exploding. However, the above is mainly used when the internal pressure of the battery is abnormally increased; _ page 3_ This paper size applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm) (please read the back first) Note the re-filling of item r.... Line · Printed by the Employees 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 508859 A7 B7 Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (2) Security protection means. Domestic Announcements No. 377045, No. 364666, and U.S. Patent Nos. 4,238,812 and 4,25 5 ·, 688, etc., but for the protection of the battery when it is deformed by external pressure, it does not do the same; Because the battery can deform outside after the impact pressure, as a result, local overheating is likely to occur, and short circuits inside the pole coil can cause sparks, scorching, and smoke, which may cause safety. Therefore, the battery is deformed under pressure. In this case, designing the necessary safety protection structure is the problem to be solved by the present invention. [Objective of the invention] The main purpose of the present invention is to provide a safety protection structure of a square battery, The utility model has the advantages that when the tank body is impacted or crushed laterally, it can avoid the short circuit, scorch, and smoke spray inside the roll, so as to improve the safety effect. To achieve the above purpose, the present invention A metal conductive sheet is installed under the battery end cover to extend to the vertical side of the battery can without touching. The length control can avoid the possibility of a short circuit without deforming the battery and deform the battery under pressure. That is, a short circuit is formed between the conductive sheet and the side of the can body. [Simplified description of the drawings] a. Schematic description: The first diagram is a perspective view of the present invention. The second diagram is a structural sectional view of the present invention. The third diagram is an enlarged schematic diagram of Part A in the second diagram. The fourth diagram is a schematic diagram of the present invention when it is deformed by impact. The size of this paper is applicable to the Chinese National Standard (CNS) Λ4 specification (210X 297 mm)
請 先 閱 讀 背 面- 之 注 意 項 再 填 P 裝 訂 線 508859 A7 B7 五、發明説明（i?) 第五圖係本發明受到壓扁變形時之示意圖 b.圖號說明： 經濟部智慧財產局員工消費合作社印製 (1) 罐體 (11) 前後面 (12) 側豎立面 (13) 極捲 (2) 端蓋板 c.附件：安全性實驗測試資料計六張。【實施例之詳細說明】 首先，請參閱第一、二圖所示，本發明所揭示之方型二 次鋰離子電池之安全保護結構，係包含有： 一罐體（1)，係呈前後面（11)較寬而兩側向豎立面（12) 較窄之扁平狀方盒體，其內部設有由正、負電極元件，及一 介於其間之隔離膜所構成之電池極捲（1 3); 一端蓋板（2)，係固定在罐體（1)開口端，其上裝設有電 極端子（3)及隔離電極端子（3)與端蓋板（2)之絕緣片（4)，且 其一側設有一通孔（2 1)以裝設安全閥（5); 其特徵在於： 該端蓋板（2)下方在密封絕緣片（4)底緣，於電極端子 (3)連接一金屬製導電片（6)，使其橫向延伸到罐體之側向 豎立面（12)而不接觸，且令其離豎立面（12)之罐壁約 0.2 5 mm〜0.5 mm的間距（D);藉導電片（6)之長度控制，可 避免電池無變形情況下短路之可能性，並使電池受壓變形 (21)通孔 (3) 電極端子 (4) 絕緣片 (5) 安全閥 (6) 導電片 (請先閱讀背面之注意事項再填. -裝· 、\ST> -線 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 508859 經濟部智慧財產局a;工消費合作社印製 A7 ____ B7五、發明説明（彳） 時，即在導電片（6)與罐體（1)側邊形成短路者。 前述導電片（6)之裝設固定方式，可以在端蓋板（2)鉚 合電極端子（3)時一併鉚上，亦可以焊接方式焊在電極端子 (3)上。為避免導電片（6)向上彎曲，造成電池罐體（11)無外 力變形情況下短路，可以選用高強度不易變形的金屬作為 導電片。 又，一般方型電池係將電極端子（3)設為正極，而罐體 (1)及端蓋板（2)為負極；當然，亦可將電極端子（3)設為負極 而罐體（1)及端蓋板（2)設為正極。 藉助上揭技術特徵，本發明之電池罐體（1)側向受到撞 擊或壓扁而如第四圖或第五圖所示之情況時，罐口變形量 >0.2 5mm時，該導電片就會接觸到罐壁造成外部形成正負 極短路，使短路電阻下降，短路電流平均分配於全極片，大 幅降低局部高熱的可能性，如此可避免極捲（13)內部短路 產生火花、燒焦、噴煙等情形，以達安全之功效增進者。 附件一係本發明依據上揭安全結構所作之實驗測試， 謹供審查參考，並請不吝指正；由該實驗結論得知，該導電 片（6)與罐壁間距0.5mm實驗測試的結果幾乎全部合格， 所以依此設計將間距（D)縮為0.25mm，則成功率會更高， 導電片（6)不可能無故增.長，只有可能變短，且經電腦繪圖 做旋轉模擬，即使導電片（6)鉚合後產生最大歪斜，距端蓋 板邊緣仍有〇.2mm的間距，足以涵括端蓋板（2)及導電片 (6)的公差，還不致於直接接觸到罐壁；是故，本發明已可達 實施階段，具有可供產業利用價值。 請 先 閱 背 之 注 意. 事 項 再 填 訂 線 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 508859 A7 _B7_ 五、發明説明（5 ) 綜上所述，本發明所揭示之方法與裝置，確具「新穎 性」、「進步性」及「可供產業利用」等發明專利要件，祈 請 鈞局惠賜專利，以勵發明，無任德感。 惟，上述所揭露之圖式、說明，僅為本發明之較佳實施 例，大凡熟悉此項技藝人士，依本案精神範疇所作之修飾或 等效變化，仍應包括本案申請專利範圍內。Please read the note on the back-then fill in the P binding line 508859 A7 B7 V. Description of the invention (i?) The fifth picture is a schematic diagram of the invention when it is squashed and deformed b. Illustration of the picture number: Consumption by employees of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the cooperative (1) Tank body (11) Front and back (12) Side vertical surface (13) Polar roll (2) End cover c. Attachment: Six safety test data. [Detailed description of the embodiment] First, referring to the first and second figures, the safety protection structure of the rectangular secondary lithium ion battery disclosed in the present invention includes: a can body (1), which is shown in front and rear A flat rectangular box with a wide surface (11) and a narrow vertical surface (12) on both sides. The inside is provided with a battery pole roll (1) composed of positive and negative electrode elements and a separator in between. 3); One end cover (2) is fixed to the open end of the tank (1), and is provided with an electrode terminal (3) and an insulating sheet (3) that isolates the electrode terminal (3) and the end cover (2). ), And one side is provided with a through hole (2 1) to install a safety valve (5); It is characterized in that the bottom cover (2) is below the bottom edge of the sealing insulating sheet (4), and the electrode terminal (3 ) Connect a metal conductive sheet (6) so that it extends laterally to the side vertical surface (12) of the tank without touching, and make it about 0.2 5 mm to 0.5 mm away from the tank wall of the vertical surface (12). Distance (D); By controlling the length of the conductive sheet (6), it can avoid the possibility of short circuit when the battery is not deformed and deform the battery under pressure (21) through hole (3) electrode terminal (4) insulation Sheet (5) safety valve (6) conductive sheet (please read the precautions on the back before filling. -Packing, \ ST > -The size of the paper is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 508859 Economy Ministry of Intellectual Property Bureau a; Industrial and Consumer Cooperatives printed A7 ____ B7 5. When the invention description (彳), that is, a short circuit formed between the conductive sheet (6) and the side of the tank (1). Fixing method can be riveted together when the end cover (2) is riveted with the electrode terminal (3), or it can be welded to the electrode terminal (3). To prevent the conductive sheet (6) from bending upwards, it can cause the battery The can body (11) is short-circuited without external force deformation, and a high-strength non-deformable metal can be used as the conductive sheet. In addition, the general rectangular battery has the electrode terminal (3) as the positive electrode, and the can body (1) and the end cover. The plate (2) is a negative electrode; of course, the electrode terminal (3) can also be set as the negative electrode and the can body (1) and the end cover (2) can be set as the positive electrode. 1) When the side is impacted or squashed, as shown in the fourth or fifth picture, the deformation of the mouth of the tank & g t; 0.2 5mm, the conductive sheet will contact the tank wall and cause a positive and negative short circuit outside, which will reduce the short-circuit resistance, and the short-circuit current will be evenly distributed to the all-electrode sheet, which greatly reduces the possibility of local high heat. 13) Sparks, scorches, smoke sprays, etc. caused by internal short circuit to improve safety. Attachment 1 is an experimental test of the present invention based on the disclosed safety structure. It is for review and reference, and please correct me; The conclusion is that the experimental results of the 0.5mm distance between the conductive sheet (6) and the tank wall are almost satisfactory. Therefore, if the distance (D) is reduced to 0.25mm according to this design, the success rate will be higher. The conductive sheet (6) It ca n’t be increased for no reason. It can only be shortened, and it can be rotated through computer graphics. Even if the conductive sheet (6) is riveted, the distance from the edge of the end cover is still 0.2mm, which is enough to cover the end. The tolerances of the cover plate (2) and the conductive sheet (6) are not yet in direct contact with the tank wall; therefore, the present invention has reached the implementation stage and has industrial use value. Please read the back note first. Matters are then filled in. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 508859 A7 _B7_ V. Description of the invention (5) In summary, the method disclosed in the present invention The device and the device do have invention patent elements such as "newness", "progressiveness", and "available for industrial use". I hope that the Bureau will grant patents to encourage inventions without any sense of virtue. However, the drawings and descriptions disclosed above are only preferred embodiments of the present invention. Modifications or equivalent changes made by those skilled in the art in accordance with the spirit of this case should still be included in the scope of patent application in this case.
請 先 閱 讀 背 面- 之 注 拿· 項 再 填 P 裝 訂 線 經濟部智慧財產局員工消費合作社印製 準 標 家 國 國 中 用一適 -尺 I張 ,紙 本 釐 * 7 2 Ί X 笛：10 / - 2 /(\ 格 I規Please read the note on the back side-then fill in the P binding line. Printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the consumer co-operative society printed a standard-size I sheet, one piece on paper * 7 2 Ί X flute: 10 / -2 / (\ grid I