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Cost Effective Manufacture of a Li-ion Battery with Rolled-Ribbon Cells

机译：具有轧制带细胞的锂离子电池的成本有效制造

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A compact, high power density, stacked-cell battery is built with disc-shaped Rolled-Ribbon Li-ion cells (7.5Ah). The specific energy of a high-performance battery (90-135 Wh/kg) is coupled with the specific power of an ultracapacitor (2.5kW/kg). Prototype battery development and testing has the objective of demonstrating an advanced design of a Li-ion battery to be a cost-effective choice for HEV, (Hybrid Electric Vehicles). The compact, high power density cell design allows a reduction of all materials to fulfill high power/high energy application. HPPC test results suggest that the Rolled-Ribbon Li-ion can accomplish the HEV application with about 50% of the electrode material that is generally anticipated for a Li-ion battery, for a significant cost savings. A low-cost button-cell enclosure (two stamped cups) eliminates costly header components and enables a no-weld assembly. Inadequate heat dissipation can limit the power capability of a larger capacity Li-ion cell/battery. Thermal management is a critical requirement. Inventek's Rolled-Ribbon battery design addresses the combined issues of thermal management and safety. Heat dissipation characteristics of the Rolled-Ribbon cells were examined at extremes of high power pulses and high energy continuous discharge at near adiabatic test conditions. Batteries are pulsed at 40 C rate (18-s duration) and continuously discharged up to a 15C rate. Only modest temperature rise resulted. Power pulses gave a temporary 2-3 °C rise and high rate full discharge gave a 10 °C rise. The temperature differential from center to the edge of cell never exceeded more than 1 °C. Intrinsic internal heat dissipation of the cells improves battery stability, as well as safety. As a result, passive thermal management for this design of HEV battery enhances Li-ion safety and abuse tolerance. Currently, vehicle tests are preceding using 48 volt, prototype batteries. The stacked-cell battery hardware has been evaluated by shock and vibration tests. This paper will discuss the benefits of the Rolled-Ribbon design in low cost, and high performance for application to HEV.
机译：一个紧凑，高功率密度，堆叠单元电池是建立与盘形轧制织带锂离子电池（7.5Ah）。高性能电池（90-135瓦时/千克）的比能量被耦合与超级电容器的特定功率（2.5千瓦/千克）。原型电池的开发和测试有客观展示了锂离子电池的先进的设计是用于HEV具有成本效益的选择，（混合动力汽车）的。紧凑，高功率密度电池设计允许减少所有材料以满足高功率/高能量的应用。 HPPC测试结果表明，轧制带锂离子可以实现具有大约50％的电极材料的HEV应用，该电极材料通常会节省大量成本。一个低成本钮扣电池外壳（2冲压杯）消除了昂贵的头组件和使无焊组件。不足的散热可以限制更大容量的锂离子电池单元/电池的功率容量。热管理是一个关键要求。 Inventek的滚动色带电池设计解决了热管理和安全的综合问题。在近绝热试验条件下，在高功率脉冲的极端和高能量连续放电时检查轧制带细胞的散热特性。电池在40℃速率（18秒持续时间中），并连续地排出到一个15C速率脉冲。只有适度的温度升高造成的。功率脉冲给了一个临时2-3℃的上升和高速率完全放电，得到以10℃上升。从中心的温度差，以小区的边缘从不超过超过1℃。细胞的固有内部散热提高电池的稳定性，以及安全性。因此，对于这个设计HEV电池的被动热管理提高锂离子电池的安全性和耐受性虐待。目前，车辆测试在使用48伏特，原型电池之前。堆叠电池电池硬件已通过休克和振动测试进行评估。本文将讨论卷筒状丝带设计成本低，以及应用到HEV高性能的优势。

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