Specifications and dimensions of power lithium-ion batteries

On August 4, 2017, GB/T34015-2017 “Vehicle power battery recycling - residual energy detection", GB/T34013-2017 " Specifications and dimensions of power battery products for electric vehicles”, GB/T34014-2017 “The auto power battery coding rules” three power battery national standard details of the officially announced. Which has been in dispute for a long time, the power battery standards have finally been settled. The introduction of three national standards, especially the unification of the specifications and sizes of power cells, means that the standardized production of power cells takes a big step forward, which is undoubtedly good for the development of the power battery industry. For some battery companies, however, time is running out to adjust production lines to the new standards.

Standard basic information

File name: GB/T34013-2017 "Specifications and dimensions of power battery products for electric vehicles”.

Sponsor: ministry of information and industrialization of the People's Republic of China;

Under centralized unit: China auto standardization technical committee (SAC/TC114);

Release date: July 12, 2017;

Release mechanism: the state administration of quality supervision, inspection and quarantine of the People's Republic of China, China national standardization management committee;

The implementation of time: on February 1, 2018.

Specifications and dimensions of power battery products for electric vehicles (hereinafter referred to as "specifications and dimensions standards") by the China automotive technology research center, BYD auto industry co., LTD., NINGDE era new energy co., LTD., China electronics technology group co., LTD. 18 research institute, the Hefei GUOXUAN high-tech power energy co., LTD, Beijing new energy automobile co., LTD., Tianjin LISHEN battery joint-stock co., LTD. Jointly drafted.

Increased compared with the exposure draft, the official draft "general requirements for battery product size specification", including "size tolerance requirement" and "requirements" size range. Each size specified in this standard of monomer battery, according to the GB/T1804 provisions on linear dimension limit deviation, in the selection of precision m tolerance grade.

The standard in the same size range of single battery, battery module and battery standard box, agreed to belong to the same specifications of products. The size range is tightened as the size of the product decreases. For example, the size range of the product of more than 500mm is limited to less than 10mm. For products with a size less than 10mm, the size range is limited to 0.5mm. It is worth noting that the height of the single battery mentioned in this standard does not include the height of the pole column.

Cylindrical battery specification size

In the draft, there are only two sizes of cylindrical batteries -- 18650 and 32650, and all other types will be canceled. About the industry has more opinions on this, the official draft canceled 32650 models, but also increased 21,700, 26650, 26700, 32700 and 32134, so that enterprises have more choices. Concerns about the future of the 21700 battery have been raised, and even after the production of the 21700 battery for ewe lithium energy and LISHEN battery, doubts have been raised, which may now seem unfounded.

Square battery specification size

In the official draft, the square battery is still given eight kinds of size in width, ranging from 65mm to 217mm, of which 70mm, 147mm and 173mm wide batteries are standard in thickness and height to give enterprises more choices.

Soft pack battery size specification

In the official draft, the standard sets the width of the soft-pack battery to seven dimensions, giving it more room for choice in height.

Battery module specification size

Formal draft, regardless of cylinder, square or soft package, width given 12 sizes, thickness and height have greater freedom of choice.

Standard box size

In the opinion draft, the size and specification of standard case are put in the body part, while the formal draft recommends the typical size of standard case of electric commercial vehicle battery in the form of appendix data. The signal released by this subtle change is self-evident -- the size of standard case of power battery tends to be recommended rather than mandatory. Of course, the size of the formal draft specifications than the choice of opinion draft greatly increased.

What is the impact of power cell size standardization?

When the draft opinions on the specifications and dimensions of power batteries were issued, some people did not understand that it was up to the market to decide which specifications and sizes to choose and should not interfere with the market. In fact, we can think about the impact of Emperor Qin Shi Huang's measures of "books with the same as texts, cars with the same as tracks" on later generations two thousand years ago. Although the standardization of power battery cannot be compared with it, the reason is the same. The standardization of power battery products is the general trend.

Liu Fei, head of ASTM's China office, compared the standards to the "language" of world trade, arguing that products without standards are difficult to circulate around the world. It can be seen that the standard chemical production of power battery is of great significance to "do as the Romans do" and "go out" to explore overseas markets of power battery products in China.

Power battery size standard has not yet unified, the enterprise from the size design of batteries to dock with the car companies in the running-in, during which a lot of manpower and material resources and time cost, etc. Zhang Yu, secretary-general of power battery application branch of China chemical and physical power industry association (hereinafter referred to as "power battery application branch"), believes that the standardization of power battery specifications and sizes makes it possible for rapid and large-scale production of batteries, and reduces the cost of power batteries as a whole. At the same time, the choice of supporting battery enterprises for vehicle enterprises is greatly increased, and it is easier to realize the accumulation of technology.

Power battery application branch standardized work/industry research, director of the frequency of power battery size standards implementation of full of expectation, and watch the standardized power battery industry's positive impact to our country. Standardization to promote large-scale production, he thought, at the same time, to improve the product quality, enhance the internal competitiveness of the industry, as well as the power battery arrangement in using and dismantling also has positive significance.

Power battery application section size parameters of the battery specifications submitted by the member companies, the results showed that the 50 mainstream battery enterprises in our country, the production of cylindrical battery enterprises have 22, 23 square battery production enterprises, the production of soft package enterprise has 29 of the battery. According to power battery application branch of statistics, in accordance with the latest national standards, about 59.3% in statistics of enterprises need to adjust the production line in whole or in part, and in proportion to the type battery enterprises adjust production more. It can be seen that most power battery enterprises still need to adjust the production line, small simple adjustment, large on the new line.

Although the national standard of power battery specification and size is more than the model in the opinion draft, and enterprises have more choices, its impact on power battery enterprises should not be underestimated. ZhouBo said there was a process for companies to get on to new production lines, which can take as little as three months, and that complex operations such as welding could take up to six months. And the standard is just six months away from the formal implementation. Therefore, enterprises should grasp the need to adjust the production line.

It is worth mentioning that the implementation of the new standard is a great benefit to equipment enterprises. And equipment enterprises will usher in a new round of growth.

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