03-09-2020 дата публикации
Номер: US20200280109A1
Принадлежит:
Battery core packs employing minimum cell-face pressure containment devices and methods are disclosed for minimizing dendrite growth and increasing cycle life of metal and metal-ion battery cells. 1. A battery core pack , comprising:a plurality of cells forming a cell stack, each cell comprising at least one anode and at least one cathode, wherein metal ions are stripped from the anode during discharge and re-plated on the anode during charge; anda containment structure at least partially surrounding the cell stack, wherein said containment structure imparts a substantially uniform surface pressure at certain value to said cell stack.2. The battery core pack of claim 1 , wherein the substantially uniform surface pressure is at least about 50 psi.3. The battery core pack of claim 2 , wherein said cells maintain a discharge capacity of greater than 2.5 Ah over at least 100 charge/discharge cycles.4. The battery core pack of claim 3 , comprising at least four cells with a core pack energy density of at least about 590 Wh/L at 30% SoC.5. The battery core pack of claim 2 , wherein said anode comprises lithium metal.6. The battery core pack of claim 1 , wherein said containment structure comprises a housing into which the cell stack is placed claim 1 , wherein the housing has openings at two ends.7. The battery core pack of claim 6 , further comprising at least one compliant pad claim 6 , wherein the at least one compliant pad is disposed between two cells claim 6 , and the thickness of the at least one compliant pad is determined by the expansion extent of the cell and is optimized between the variables of allowed battery pack volume and durometer rating of the compliant pad.8. The battery core pack of claim 7 , wherein said compliant pad comprises polyurethane sheet material with a Shore durometer of between about 40-90 claim 7 , and a Bashore resilience of between about 22-40%.9. The battery core pack of claim 8 , further comprising a cooling pad disposed between two ...
Подробнее
