Will solid-state batteries be suitable to soft-package technology in the future?

According to the state of the electrolyte material, the soft pack battery can be divided into a soft pack liquid battery and a soft pack polymer battery. The former uses a liquid electrolyte and the latter uses an electrolyte mainly. The all-solid-state battery with solid substance as electrolyte is still in the demonstration stage, which will further improve the energy density and safety of the power battery. Since the liquid electrolyte is not used, the battery package can use a soft bag. The soft pack liquid battery is widely used in domestic mobile phones and charging treasures. The famous best-selling model Nissan Leaf is loaded with the cascading soft pack liquid battery provided by AESC; the soft pack polymer battery is used for notebook computers and brand mobile phones.

In the long run, all solid-state batteries have high energy density and the strongest safety, which is expected to drive the further development of flexible packaging. The all-solid battery replaces the diaphragm and the electrolyte with a solid electrolyte such as a polymer, an oxide or a sulfide to fundamentally solve the battery safety problem; the energy density of the battery cell is expected to increase to 400-500 Wh/kg. All solid-state batteries are still in the research and development stage. BMW, Toyota, Bosch and some domestic companies are actively deploying, and it is expected to become the mainstream battery route in the future. Kolibri of Germany developed a large-capacity polymer solid-state lithium battery for Audi, with a total weight of 300kg and a driving range of 600km. The solid-state battery casing and assembly process are simplified because no liquid is needed, and the soft-package sealing technology suitable for solid-state battery packaging is expected to open up new growth space for soft-pack battery development.

We believe that in the short term, flexible packaging, as a means of light weighting and high-energy batteries, will occupy an incremental market at a higher proportion, and long-term optimistic about the trend of flexible packaging for all solid-state batteries. The new energy vehicle policy has released a signal that boosts battery performance and increases energy density. With the increasing subsidy threshold, flexible packaging can help more battery companies to increase energy density and enhance product competitiveness, and flexible packaging will occupy a place in the incremental market.

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