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Is it better to use soft or hard packaging for lithium forklift batteries? The important difference between soft pack lithium-ion batteries and hard pack lithium-ion batteries lies in the material of the shell of the lithium-ion battery. The weight of steel shell batteries is more important than that of batteries of the same volume, but it is not easy to distinguish between aluminum shell and flexible packaging. However, flexible packaging batteries are slightly softer than aluminum shell batteries and can easily deform when broken by hand.

Regarding the question of whether lithium iron phosphate batteries are better packaged in soft or hard packaging, we can first understand their characteristics.

Introduction to Soft Pack Lithium ion Batteries

A soft pack lithium-ion battery is simply a liquid lithium-ion battery with a polymer shell. In terms of structure, aluminum-plastic film packaging is used, and in the event of safety hazards, the soft pack battery will only burst and crack at most. Soft pack lithium-ion batteries are also another term for polymer batteries.

Introduction to Hard Pack Lithium ion Batteries

Hard pack lithium-ion batteries are divided into two types: cylindrical and square. The structure of packaging has its own advantages and disadvantages, but it is important to consider different requirements and locations.

◆ Cylindrical hard pack lithium-ion batteries

The production process of cylindrical lithium-ion batteries is mature, with a high degree of automation and low PACK costs; There are many models, including 18650, 21700, 26500, etc; The cylindrical battery has various forms and is suitable for the sufficient layout of electric vehicle space design; Cylindrical battery packs have a large heat dissipation area and are generally packaged in steel or aluminum shells with relatively low specific energy.

◆ Square hard pack lithium-ion battery

Square and cylindrical aluminum shells are generally also aluminum shells, which provide better protection for battery cells than soft pack batteries. The safety of battery cells has also been greatly improved compared to cylindrical batteries. However, consistency assurance is relatively difficult, there are too many models, the process is difficult to unify, and it is suitable for customized production, which is not conducive to automated production of lithium-ion battery packs.

Comparison between soft pack lithium-ion batteries and hard pack lithium-ion batteries

weight

Compared to steel shell lithium-ion batteries and aluminum shell lithium-ion batteries of the same capacity, soft pack lithium-ion batteries are 40% and 20% lighter, respectively. In terms of weight, soft pack lithium-ion batteries are much lighter than hard pack lithium-ion batteries, but the important weight ratio lies in the weight of the two outer shells.

capacity

Compared to steel shell batteries and aluminum shell batteries of the same size, soft pack lithium-ion batteries are 10% to 15% and 5% to 10% higher, respectively. Although the capacity of soft pack lithium-ion batteries is not much higher than that of hard pack lithium-ion batteries, there is still a certain gap between the two. In areas with high capacity requirements, the application of soft pack lithium-ion batteries is still higher than that of hard pack lithium-ion batteries.

shape

Because the internal battery of soft pack lithium-ion batteries is liquid, their appearance can usually have multiple shapes. This characteristic has great advantages over hard pack lithium-ion batteries in areas where there are specific requirements for the shape of lithium-ion batteries.

Compared to hard pack lithium-ion batteries, soft pack lithium-ion batteries have more or less advantages in weight, capacity, shape, and other aspects. However, the existing core models of soft pack lithium-ion batteries are still relatively few, and the cost of developing new models is also high. Therefore, the market demand that soft pack lithium-ion batteries can meet is still limited.

Nowadays, the difference in market share between soft pack lithium-ion batteries and hard pack lithium-ion batteries is not significant, as different usage environments have different requirements for the outer shell of lithium-ion battery packs. However, with the development of technology, it is also uncertain how the lithium-ion battery pack market will become in the future.

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