In 2016, the relevant policy department issued an important specification document for the size of the power battery. This is the "Specification Size of Power Battery for Electric Vehicles " (Draft for Comment), which was released in October 2016.

The relevant policy-making department stated that the specification document was formulated to further unify the size and size of the power battery, promote rapid selection of battery cells, realize large-scale manufacturing of battery manufacturers, and reduce R&D and production costs of battery-integrated enterprises and vehicle companies. And reduce the difficulty of battery recycling.

However, according to the author's understanding, this document, which is intended to regulate the size of power batteries, has also brought a lot of confusion to power battery companies.

Standard setting is only unfair to the individual industry insiders

In October 2016, the National Automotive Standardization Technical Committee revised and revised the "Specifications and Dimensions of Power Battery Products for Electric Vehicles" (draft for comments), which will be divided into three categories: cylindrical, square and soft-packed. Recommended specifications for the size and size series of the individual, module and system (battery box). Among them, there are 2 cylindrical battery cells, 8 square battery cells, 8 soft battery cells, 9 square battery modules, 8 soft battery modules, and 5 standard battery boxes. It is recommended to use a voltage rating of 12V multiple for the battery module.

In December 2016, the relevant government departments issued the “Interim Measures for the Management of Recycling and Utilization of Power Battery for New Energy Vehicles” (draft for comments). According to industry sources, the relevant government staff said in the communication with the company, according to the "Interim Measures for the Management of the Recycling and Utilization of Power Battery for New Energy Vehicles" (draft for comments), taking into account the subsequent use of the power battery, after the new energy bus The power battery box used must meet the dimensional requirements specified in the "Specifications for Power Battery Specifications for Electric Vehicles" (Draft for Comment).

Some industry insiders said that they could not understand the restrictions imposed by relevant government departments on the size of power batteries. Some people bluntly said: "Limiting the size of the battery is like limiting people's appearance. The problem is that people come out from the mother's womb and look like a scorpion. Is it true that the one-eighth-eighth Shandong Dahan was born and had to retreat to grow one meter? Can a six-person person be born at home? Is it necessary to have a power battery in China all the way?"

More industry insiders point out from reality that if they are produced according to the new specifications, many battery companies need to renovate or even replace the original production line. Many production lines introduced by enterprises have not been put into production for a long time, and the transformation or replacement of production lines will bring considerable losses to enterprises. Moreover, each battery company has its own craftsmanship. For example, some are good at making half-winding, and some are good at making full-winding. The battery company's production line is designed according to its own process. If the production line is replaced, it is quite I gave up the craft that I was good at.

According to another person familiar with the matter, the standard box size listed in "Specifications and Dimensions of Power Battery for Electric Vehicles " (Draft for Comment) is actually the size of the battery box being produced by a large-scale enterprise in the industry. The standards are developed for individual companies and are unfair to most power battery companies. The person proposed that if the power battery products are standardized from the SOC (charge state), SOH (charge rate) and other data, it may be more practical and executable.

How to develop standards to gain wide recognition

China's power battery standardization problem has a long history. Over the years, all parties including the government, car companies, battery companies, and standards-setting organizations have tried to develop the relevant specifications of power batteries to improve the disordered state of the battery models and the scattered production of power batteries in China. .

However, from the current industry reaction, it is not easy to develop a widely recognized standard. At present, most of China's power battery companies produce power battery products according to their own production conditions and downstream customers' requirements. The products are different in shape, capacity and materials, and most of them are grouped. Each has its own position, which makes it very difficult to develop a battery size standard that is recognized by all parties.

In this regard, industry insiders said that the experience of some foreign standards development is worth learning. For example, at the end of 2015, several consecutive car fire accidents occurred in the United States, and Amazon forced the removal of all the balance car products on sale. Faced with the crisis of the emerging industry such as balance car, the US UL Standards Development Organization responded quickly and spent nearly three months to develop safety standards for the balance car circuit system. The standard was implemented in February 2016 and played a positive role in sorting out the chaos in the industry and promoting the healthy development of the balance car industry.

According to Cathy Feig, the standard representative of the US Embassy in China, China and the United States have completely different standards-setting systems. China's standard-setting system is “top-down”, mainly by government ministries, various think tanks, and various standardization committees to lead the formulation of standards; the United States and China are “bottom-up”. The system is dominated by industry and market, and US companies and consumers play a positive role in the development of consumer product safety and standards.

The author believes that the standard manufacturing of power batteries is the trend of industrial development. However, from the way of standard formulation, relevant government departments in China should consider borrowing from the standard setting system with “mass basis” in the United States, soliciting opinions from enterprises in the formulation of power battery specifications and sizes, and try to obtain the approval of most enterprises to avoid Cause losses to the company and promote the healthy development of the entire industry.

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