The invention relates to a top sealing head for improving the encapsulation effect of a lithium ion soft packing battery. The top sealing head is composed of an upper head and a lower head. Wherein, the lower end head is provided with four limiting stations, each end of the head is respectively provided with two batteries in the middle of the head, and one end of each end of the sealing head is matched with each other, and the spacing table is highly consistent. The distance between the two limiting stations located in the middle of the head and the top sealing surface is 1mm. Side sealing packaging seal packaging surface and the top surface height Z direction is set to 5 mu 10 mu height difference, alleviate the side seal edge overflow condition. The side sealing packaging surface is opposite to the polar ear groove to match the design of the corresponding battery type. A R1.0mm arc is arranged at the intersection of the side sealing surface and the top sealing surface so as to match the arc state of the corner of the shell. The upper head is a flat head, the lug position is slotted, and the groove depth is matched. The battery model uses the ear size. The design of the utility model alleviates the deformation of the head of the packaging line and the deformation of the head at high temperature and high pressure, and improves the consistency of the encapsulation thickness of the lithium ion soft package battery.
【技术实现步骤摘要】
改善锂离子软包装电池封装效果的顶封封头
本专利技术涉及一种锂离子聚合物电池,特别涉及一种改善锂离子软包装电池封装效果的顶封封头。
技术介绍
锂离子聚合物电池具有电压高、比能量高、循环使用次数多、存储时间长、尺寸同比小等优点,在便携式电子设备上如移动手机、蓝牙耳机、MP3、MP4、MP5、数码摄像机和笔记本电脑等得到了广泛应用。伴随着锂离子聚合物电池能力密度的提升,越来越薄的铝塑壳得到更加普遍的应用,目前较为主流的铝塑壳厚度为113μ、91μ、76μ、67μ,装配过程中电池气密性的保证也增加了较大的难度。对锂离子聚合物电池来说,影响电池气密性的因素主要为封装效果和角部壳裂。软包装锂离子电池铝塑壳主要由尼龙层、铝层、PP层构成,在软包装电池封装工位,通过一定的温度、压力、时间要素,借助铜质封头完成两层铝塑壳PP层熔融粘连,保证软包装聚合物电池封装的气密性。封头两侧通过限位台装置,进行封装厚度的控制,不同厚度的铝塑壳匹配不同的限位台高度封头;上下封头为中间部位被动作用力,封头两侧两侧限位台为反向作用力;在反复的封装使用过程中,上下封头逐步出现变形,并不断累积,导致中间部 ...
【技术保护点】
一种改善锂离子软包装电池封装效果的顶封封头,其特征在于该顶封封头由上封头和下封头组成;其中,下封头设有四个限位台,封头两端各一个两端限位台,封头中间对应两个电池最终封装边各一个侧封限位台,限位台高度一致,且匹配电池使用铝塑壳规格;上封头为平封头,极耳位置开槽,开槽深度匹配电池型号使用极耳规格;上、下封头闭合时,在一定的温度185℃±10℃、压力0.25 MPa±0.1 MPa和时间3s±1s参数条件下,侧封封装面区域完成电池最终封装边局部预封装,顶封封装面区域完成电池顶部封装,极耳槽完成电池顶部极耳位置的封装。
【技术特征摘要】
1.一种改善锂离子软包装电池封装效果的顶封封头,其特征在于该顶封封头由上封头和下封头组成;其中,下封头设有四个限位台,封头两端各一个两端限位台,封头中间对应两个电池最终封装边各一个侧封限位台,限位台高度一致,且匹配电池使用铝塑壳规格;上封头为平封头,极耳位置开槽,开槽深度匹配电池型号使用极耳规格;上、下封头闭合时,在一定的温度185℃±10℃、压力0.25MPa±0.1MPa和时间3s±1s参数条件下,侧封封装面区域完成电池最终封装边局部预封装,顶封封装面区域完成电池顶部封装,极耳槽完成电池顶部极耳位置的封装。2.根据权利要求1所述的改善锂离子软包装电池封装效果的顶封封头,其特征在于位于下封头中间的两个限位台与顶封封装面间距>1mm,避开顶封壳体外侧未封区。3.根据权利要求1所述的改善锂离子软包装电池封装效果的顶封封头,其特征在于所述下封头侧封封装面...
【专利技术属性】
技术研发人员:于海彬,
申请(专利权)人:天津力神电池股份有限公司,
类型:发明
国别省市:天津,12
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。