Lithium titanate (LTO) is used as a negative electrode material in batteries. Due to its own characteristics, the material and the electrolyte are likely to interact and produce gas precipitation during the reaction of the charge and discharge cycle. , ordinary lithium titanate batteries are prone to flatulence, which causes the cells to swell and their electrical performance to drop significantly, significantly reducing the theoretical life of lithium titanate batteries. Test data shows that ordinary lithium titanate batteries swell after about 1,500 to 2,000 cycles, making them unable to be used normally. This is also an important reason that limits the large-scale application of lithium titanate batteries. Unlike conventional lithium-ion batteries, after putting lithium titanate batteries into operation pproduced at home and abroad for a period of time, traces of gas are often observed in individual soft-packaged cells. These gases are different from those produced during the formation of a new battery. The former can be eliminated during the battery production process.
But the latter is produced when using the battery, or it is difficult to avoid under the current conditions of the process. Taking soft batteries as an example, lithium titanate batteries generally rely on strong plywood pressure at both ends to maintain uniform contact between the battery pole pieces to maintain current density uniformity , whether gas is produced or not. Excessive gas production will obviously affect its performance. At present, Toshiba's aluminum shell lithium titanate battery shows its superiority. The hull of there can retain a small amount of gas in the battery without excessive deformation. However, as the aluminum shell battery becomes larger (e.g. 50 Ah), the effectiveness of the hard shell in resisting air pressure will be weakened. The author believes that the study of the chemical reaction mechanism of gas generation during circulation should be a good scientific research topic. Additionally, one of the advantages of lithium titanate battery technology is its high power. Although the battery itself can support high current charging and discharging, thick individual cells are still not suitable for high power applications, because the heat generated by large currents will be difficult to dissipate if the battery is too thick . Therefore, for high-power lithium titanate batteries, large and thin soft battery structures are still a reasonable choice.