Standardization of power battery size

On September 23, 2016, the National Automobile Standardization Committee announced on the official website the draft of the recommended national standard for motor vehicles, the size and specifications of the power battery for electric vehicles, revised by the Electric Vehicle Subcommittee. I was surprised at the first sight. After reading the instructions and sorting out the original reason, I believe that China's power battery industry will further influence Matthew in the future. The stronger will be stronger and the weaker will be weaker.

The battery size uniform for three major reasons

Power battery itself because of its relatively expensive properties, make its scale effect is very strong. So the whole power battery industry has three pillars, size, performance and security, and the size of the problem involved is deep. If there is no relatively uniform size, leading to many problems:

Battery monomer production enterprises: production and research and development costs, materials technology innovation to increase on the amount of time, and then to mass production and market application increased uncertainty.

Battery system integration and the enterprise: the battery monomer selection exist multiple paths, need to choose a different approach to contrast, application of the technology accumulation, if choose wrong will weaken the competitiveness of the final product.

Full life cycle to consider: in terms of battery recycling, it is difficult to form the compatibility of different enterprises

Solving these three problems should be the main appeal of the uniform size of the power battery.

Where does the size standard come from?

The preparation instructions issued together with the above-mentioned "Dimensions and Dimensions of power battery Product Specifications for Electric Vehicles" provide a detailed description of the two stages of the formation of the dimensional standards, and also reflect the process of the results of the entire consultation draft:

At the beginning of the first stage (2014-2015) in September

Publish the "Specifications and Dimensions Standards Survey Form", and then summarize and analyze. At this stage, there are many kinds of batteries and various sizes, but it is impossible to determine a reasonable size screening principle according to the data analysis method, so as to select the most representative product size. So there is a second phase of follow-up.

The second stage (October 2015 - September 2016)

This one phase reference "vehicle production enterprises and product announcement database" and "auto motive battery production enterprise management system" the two databases, through the methods of weighting filter:

Starting from the existing market demand, balance with the actual situation of the vehicle battery.

Through technical screening, through specific energy index to judge the advanced or not

So we see the monomers results as follows:

Compared with ISO/IECPAS16898, the requirements of the GBT leaner, limit the broad requirements of 16898 in a smaller range

With DINSPEC91252, compatible with existing domestic models

91252 mainly to do according to the demand of the passenger car, thinking of HEV (hybrid electric vehicle), PHEV (plug-in hybrid electric vehicle) and the demand of the EV (electric cars), less domestic commercial vehicle application scenario

What impact will the standard have?

About setting standards, ISO (international organization for standardization) and DIN (German standardization institute) level, only to the battery monomer battery module and system level are not provided. And our country GBT (recommended national standards) here in this respect to do a more detailed definition: according to GBT recommended monomer composition module recommended the range of the module, according to the requirement of the pilot use recommended requirements, according to the 12 v voltage multiplier to configure a single number. This is the first global segmentation extension, for our country in contrast with more new energy wave player's environment is good or bad, after all, is a more standard standardization or compressed the potential engineering design space, it remains to be the test of time.

But with the size of the specific provisions:

Cylindrical: (1) the size is small, cylindrical battery monomer module block size is more flexible and stipulates the wrong the size of the cylindrical battery module.

(2) Square and soft package module list as follows, according to the actual requirements, the size can maintain a constant surface size, on a degree of freedom to adjust.

From the point of this standard, the future of China's power battery industry will further the Matthew effect, the stronger the strong and the weak weaker, the entire industry giants began to operation, and the automobile enterprise passive at the upstream end to achieve the "modular", guess there will be several possibilities:

Battery enterprise further expand the scale, those couldn't keep up with will fall in the second and third tier. With the development of standardization, ambitious car companies will choose according to own situation into power battery industry, the road ahead has been cleared, and the high-altitude mode is about to start. In the future, the country also hopes to have several leading battery companies and high-volume vehicle companies.

The page contains the contents of the machine translation.