Cylindrical, square, soft pack power lithium battery, which is better?

The current car power lithium battery market is mainly composed of cylindrical, square, soft package lithium-ion batteries. Under the guidance of the current national policy, power battery energy density becomes a major index. Let's introduce the product characteristics and the current market manufacturer.

A, cylindrical lithium-ion batteries: skilled old, robust growth fields

Cylindrical lithium-ion battery is the earliest mature industrialization of lithium battery products, first launched in 1992 by Japan's SONY company 1992 lithium-ion batteries, the application direction of the time was 3 c digital products. After more than 20 years of development, cylindrical lithium-ion battery production technology mature, high production efficiency, cost is relatively low, so PACK costs are relatively low, lithium battery yield more square lithium battery are higher and soft package, product consistency, security is relatively good.

Because of large cylindrical lithium-ion battery pack heat dissipation area at the same time, the heat dissipation performance is better than that of square battery. At the same time, due to the cylindrical battery to facilitate a variety of shapes, is suitable for the electric car space design layout. Based on these advantages, most of the domestic enterprises in the power sector, mostly choose cylindrical batteries. But general cylindrical battery steel shell encapsulation, although security is higher, but the heavy weight, than with a relatively low energy, it also become a cylindrical lithium battery power battery application on board.

At present domestic cylindrical lithium-ion battery enterprise representatives are:

Bak power

Bak power from 2005 in 2005 to start producing cylindrical lithium-ion batteries, is one of the domestic traditional cylindrical lithium-ion batteries, Bick power is given priority to with cylindrical lithium-ion batteries, lithium battery products have been applied in the automobile industry. For cylindrical battery research, Bick power it has advantage of years of accumulated technology and experience, and through the growing process, adjust the layout, gradually optimized the cylindrical battery consistency, and achieve rapid growth in recent years.Bick power still is given priority to with cylindrical battery at present stage, the next step will be layout square cells, but not to see it as a main product in 2017, the layout of rectangular battery only to adapt to market changes.

The lion technology

In 2017 the lion in Fujian ZhaoAn high-end technology ternary lithium battery power(a) project has entered mass production. Is expected by the end of the phase ii project implementation production, three phase of the project complete the equipment installation. One to three phase of the project is a total capacity of up to 6 GWH, all give priority to with cylindrical battery, mainly used in passenger cars and car logistics market. The lion technology think battery industry will be very competitive in the future, in order to close to the market, on the premise of ensure cylindrical battery is given priority to, also both square battery. New energy in Xiangyang, hubei the lion Yicheng high-end lithium electricity project construction, with a total investment of about 3.15 billion yuan, planning and construction of 6 fully automatic production line, annual production capacity of 6 GWH, the main production capacity of more than 40 ah and square aluminum ternary power lithium battery, battery PACK and the PACK.

In the future, the lion technology route still bullish on cylindrical battery, and actively expand in the field of new energy industry chain layout. In ensuring the cylindrical battery production, on the basis of mature technology, standardization, further improve the enterprise status and competitiveness in the field of new energy.

Power battery lang

Lang batteries since its inception, the orientation for new power battery market, product positioning for a larger capacity of 26650 lithium battery as the main products of company, because of the power battery mass group, relative capacity more monomer, PACK cost and battery management will reduce the difficulty, the product is safer, longer service life.

Using force lang batteries ternary system 5000 mAh power battery core, production of the second generation of automobile power battery overall energy density is 125 KWH/Kg, from the third batch of recommended target vehicle battery configuration, belongs to a hierarchical levels.

Force lang battery 5500 mAh lithium-ion battery has been mass production, to a large number of configuration car power battery, in combination with the vehicle structure optimization, the aluminum extrusion profiles and SMC composite material, on the premise of guarantee enclosure structure strength realized the lightweight design of the battery pack, the vehicle battery density is expected to exceed 135 ~ 135 KWH/Kg.

Two, square battery: wide processing various types, models too much strives for the unification

Square battery shell is aluminum alloy, stainless steel materials, such as more inside the coiling, or folding chip technology, the protection of batteries is better than that of soft package of batteries, batteries, security relative cylindrical batteries have improved considerably. Square battery is still in the high hardness of the shell and light weight technology development direction, will also provide the market with more superior performance of lithium battery products.

BYD

BYD's power battery products is given priority to with square cells, there were some soft package process. BYD to make "a long time in the future, square or market, and the circular battery would be another mainstream" judgment. At the same time, BYD battery reservations for soft package, looking forward to through the scientific and technological progress, the direction of the technical problems in, get rid of disadvantages of soft package of batteries. BYD on group's new energy automotive business, adhere to the whole industrial chain strategy, from material to battery, motor, electric control and whole vehicle "to", on the market demand and technology has the original opinion, influenced by peer enterprises process layout is smaller.

Tafel

We have learned, Tafel earlier for cylindrical and square has evaluated the battery. But, in the final stage of PACK, monomer after a cylindrical battery group contrast square batteries is missing, it is for this reason, Tafel chose square battery. Tafel is given priority to with square battery, material divided into lithium iron phosphate and chemical system ternary lithium battery. Tafel thinks under the background of current technology, cylindrical battery group after little advantage in terms of energy density. And soft package of batteries, on the monomer has obvious advantages, but the support group after cooperate, energy density and square battery was similar. The future, Tafel will stick to give priority to with square cells, but don't give up on columns and soft package depth exploration of the battery.

Three, soft package battery: good whole potential, only sigh cost day coke

Soft package the positive material, negative material and used in the battery diaphragm with the traditional distinction between steel shell, aluminum shell lithium battery is not big, the biggest difference is with polymer electrolyte and flexible packaging materials, this is the most critical in soft package of batteries, the most technically complicated materials. As a new rise in recent years in the field of passenger car battery specifications, the soft package of batteries in the proportion of passenger cars in the field of power battery is gradually promoted, because the soft package of battery materials cost is cylindrical and square are higher, so the cost will be soft package battery enterprise the focus of the breakthrough in the future.

Shuangdeng group

Shuangdeng group in recent years has been committed to optimize soft package of batteries, face to face with the problem of soft package of the battery PACK. Through unremitting efforts and insist, Shuangdeng soft package aluminum shell lithium iron phosphate, three yuan soft package products have passed GB/T31485-2015 standard test, and have been in many buses as well as through logistics vehicle road test.

Shuangdeng group, said an official with the related power lithium battery as the future development of Shuangdeng group is an important point, go hand in hand to do battery research and development and production, has the layout on a variety of battery technology, and according to different users with the most optimal solution, the option to the market and customers.

Day strength of new energy

Day new energy to focus on soft package power battery technology research and development, production, sales, especially focuses on the R&D of soft package power battery safety and technical innovation, on the ternary laminated soft package battery technology has obtained corresponding results. Day strength soft package for the construction of new energy in Foshan batteries 4 GWH new base has been built, a period of 2 GWH capacity will be put into production at the end of the year. Day strength of new energy has now completed three yuan high nickel battery research and development and has entered the stage of pilot, the energy density has obvious competitive advantage. Considering the current domestic soft package battery PACK automation level is generally low, day time new energy also truly feel "stressed out", the next, day new energy plan by improving the technology level, to Japan and South Korea the battery as soon as possible the automation level of the enterprise.

All in all, three types of lithium batteries, different enterprises may be because of some historical reasons, product technology or out of anticipation for the future power battery market and make the image of products to choose. From the point of the current market situation, three products have their own advantages, also has the disadvantage of relatively insufficient, the market fields of each battery has dominated, is relatively high energy density square battery will become branch esteems, or mature and more cost advantage of cylindrical battery become dominant, have lead to the development of the market and selection.

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