摘要：【中文】本发明涉及软包锂离子电池的二封除气方法，该二封除气方法包括：首先在室温下进行降温，并在二封除气腔体内将锂离子电池水平放置，对电池上下面施加压力；然后将刺刀底部抬升高于锂离子电池本体的水平位置，且刺刀口位置在锂离子电池本体侧边一定距离处，对应气袋与水平位置有一夹角，同时对电池腔体内进行抽真空至真空度达标，刺刀刺破气袋铝塑膜，进行负压除气；最后真空度达标状态持续一段时间后，上下封头在锂离子电池本体侧边一定距离处将铝塑膜热封，热封结束后，真空状态解除；本发明具有除气效果好、电池保液率高、循环寿命长、电性能一致性高的优点。 【EN】The invention relates to a secondary sealing degassing method of a soft package lithium ion battery, which comprises the following steps: firstly, cooling at room temperature, horizontally placing the lithium ion battery in a secondary degassing cavity, and applying pressure to the upper surface and the lower surface of the battery; then, the bottom of the bayonet is lifted to be higher than the horizontal position of the lithium ion battery body, the position of the bayonet opening is arranged at a certain distance on the side edge of the lithium ion battery body, an included angle is formed between the corresponding air bag and the horizontal position, meanwhile, the inside of the battery cavity is vacuumized until the vacuum degree reaches the standard, the bayonet punctures the aluminum-plastic film of the air bag, and negative pressure degassing is carried out; finally, after the vacuum degree reaches the standard state for a period of time, the upper and lower seal heads heat-seal the aluminum-plastic film at a certain distance from the side edge of the lithium ion battery body, and after the heat-sealing is finished, the vacuum state is relieved; the invention has the advantages of good degassing effect, high battery liquid retention rate, long cycle life and high electrical property consistency.

摘要：【中文】本发明涉及本发明涉及一种软包锂离子电池的极耳复合焊接方法，该极耳焊接方法包括：针对层叠后电芯，将铜箔和镍片进行焊接，铝箔和铝片进行焊接，首先使用超声波焊接机进行铜、铝箔预焊，预焊尺寸长*宽4mm*3mm；然后使用超声波焊接机进行极耳片焊接，焊接尺寸长*宽42mm*3mm；最后使用激光焊接机进行激光焊接，焊接形状条形，直径0.3mm，该极耳焊接方法首先进行极耳超声焊接，保证极耳的焊接强度；然后在超声波焊接的基础上增加激光焊接，有利于增强极耳焊接强度，防止焊接虚焊，提高极耳片和铜铝箔的导电性能，提高电芯的倍率性能，改善电芯充放电过程极耳温升过高现象，提升电芯循环寿命；本发明具有抗拉强度高、接触电阻低、极耳发热量低的优点。 【EN】The invention relates to a tab composite welding method of a soft package lithium ion battery, which comprises the following steps: welding copper foils and nickel sheets and welding aluminum foils and aluminum sheets aiming at the laminated battery cell, firstly, prewelding the copper and the aluminum foils by using an ultrasonic welding machine, wherein the prewelding size is 4mm in length and 3mm in width; then, an ultrasonic welding machine is used for welding the tab sheets, and the welding dimension is 42mm in length and 3mm in width; finally, laser welding is carried out by using a laser welding machine, the welding shape is strip-shaped, the diameter is 0.3mm, and the tab welding method firstly carries out ultrasonic welding on the tab to ensure the welding strength of the tab; then, laser welding is added on the basis of ultrasonic welding, so that the welding strength of the tab is enhanced, welding rosin joint is prevented, the conductivity of the tab and copper-aluminum foil is improved, the multiplying power performance of the battery cell is improved, the phenomenon of overhigh temperature rise of the tab in the charging and discharging processes of the battery cell is improved, and the cycle life of the battery cell is prolonged; the invention has the advantages of high tensile strength, low contact resistance and low heat productivity of the electrode lug.