Preparation Of Flexural Lithium Polymer Battery And Enhancement Of Energy Density

The structural battery belongs to multifuction material which combinated the battery and the configuration. It can offer energy sources and also satisfy the request for enduring power. The capability of flexural lithium polymer battery is excellent so that it can be used in the aviation area as a Structural batteries.In this article, The molding and encapsulation technic of flexural lithium polymer which used in MAV were studied. This artilcle also designed and adjust the inverse proportion of cathode and anode, the fold method and used a new cathode material which has higher capacity to obtain flexural lithium polymer battery which was satisfy with the need of MAV.The effect factors comprise temperature, time and pressure to the preparation of the structural battery were researched by the means of orthogonal experiments. It discovered that the best heating laminate conditions of cathode were displayed--temperature: 140℃, press: 2Mpa, time: 30S. the best heating laminate conditions of anode were displayed-temperature: 150℃, press: 2Mpa, time:30S.This paper used hydraulic piamater molding to prepare flexural lithium polymer battery in order to obtain symmetrical temperature and press. The effect factors comprise different thickness piamater, different preparation technics was searched and decided to adopt pretreatment and then begin to preparation. Pretreatment can keep the figure of battery and offset the asymmetry of the press. The best heating laminate conditions were displayed--temperature: 100℃, press: 1Mpa, time: 5min.A set of effective encapsulation devices were designed and manufactured in order to packing the flexural part. The experiment showed that this devices is excellent in encapsulation by pretreatment and then packing. The configuration dimension of the airfoil structural battery basically accorded with the design parameter. It discovered that the best conditions of encapsulation were displayed-- voltage: 12 V, time: 20S.flexural batteries and flat batteries using the same material was obtained. Their electrochemistry properties were tested using rechargeable battery performance testing device. It showed that Structural batteries and flat batteries have the same energy density, efficiency and resistance. This result also showed that the preparation technics of flexural lithium polymer battery is feasible.In order to enhance the energy density, this paper designed and adjust the inverse proportion of cathode and anode, the fold method and used a new cathode material which has higher capacity. The structural batteries obtained by this way has a energy density of 169wh/kg. In order to enhance the capacity of anode, modified anode was prepared. It showed that modified anode has higher capacity. Reversible capacity and efficiency of modified anode with different content of Sn was studied. It is showed that the best content of Sn is 20%. Anode material with this content can enhance the capacity about 20%.