Ruan Peng, deputy general manager of Pinggao Group Energy Storage, shared
the technical trends and applications of Pinggao Group's energy storage on the
grid side regarding lithium battery systems. China's energy storage industry has
reached an inflection point. Grid-side energy storage projects have grown
significantly, driving a surge in the scale of electrochemical energy storage
dominated by lithium batteries and becoming the main growth point of the energy
storage market. Research data from the Gaogong Industrial Research Lithium
Battery Research Institute (GGII) shows that China’s newly installed capacity
reached 629MW in 2018, a year-on-year increase of 420%. Among them, the newly
put into operation grid-side electrochemical energy storage scale is 206.8MW,
accounting for 36% of the newly put into operation electrochemical energy
storage scale in the country, becoming the main growth point. Backed by Pinggao
Group, an industrial unit directly under the State Grid, Pinggao Group Energy
Storage Technology Co., Ltd. (hereinafter referred to as "Pinggao Group Energy
Storage") vigorously develops the energy storage industry and flexes its muscles
in the field of grid-side energy storage. The company provides integrated
solutions such as energy storage power station design, core product supply,
power station construction, general engineering contracting, and intelligent
operation and maintenance. Currently, it has carried out exchanges and
cooperation with a number of well-known domestic and foreign enterprises and
research institutes, and has selected and applied different technical routes
according to local conditions. Recently, Ruan Peng, deputy general manager of
Pinggao Group Energy Storage, also shared in public the technical trends and
application discussions of Pinggao Group's energy storage on the grid side
regarding lithium battery systems. ?Lithium batteries: low cost/long
life/safety/specialization Ruan Peng believes that lithium iron phosphate
batteries are the current mainstream battery type, and their safety features and
low cost make them more potential in the field of grid-side energy storage. Low
cost, long life, safety, and specialization are also key evaluation indicators
for energy storage integrators to consider lithium battery companies. Low cost.
During the public bidding process in 2018, BYD's Pinggao bidding process has
reached 0.86 yuan/Wh. As the scale continues to expand, this price is expected
to fall further. Regarding long life, Pinggao has also done relevant research
with some scientific research institutes and battery manufacturers to explore
lithium batteries with a lifespan of nearly 20 years and a cycle life of more
than 10,000 times. Only with this goal can the energy storage system approach
the lifespan of the switch cabinets in the power grid and truly match the
operating life of other standard facilities in the power grid. Judging from the
current progress of the project, the possibility of realization is still very
high. Safety, from the perspective of grid-side energy storage safety, mainly
focuses on fire early warning and emergency prevention of subsequent fires.
Thermal runaway blocking of battery cells, the prevention of battery thermal
runaway expansion, complete fire warning, including early warning of some
accidents, and the final emergency and disaster prevention system, a complete
set of all-round safety system is a perfect safety system planning direction. In
terms of specialization, the concept of special batteries for energy storage has
gradually emerged. More and more battery manufacturers have launched special
batteries for energy storage, mainly targeting the performance characteristics
of long life, high safety, and high reliability of energy storage. ?BMS: The
trend of multi-parameter high-density monitoring continues to deepen
multi-parameter high-density monitoring. The battery is a typical Internet of
Things system. During the entire battery operation process, and even during the
storage process, intensive monitoring of operating parameters is very important
for the entire battery evaluation. The Pinggao Jiangsu project has begun to
monitor the temperature of each battery string. In the future, gas monitoring
and other parameters will be added. This trend will continue to deepen in the
future. High-speed communication technology. This is also combined with the
increase in monitoring density and frequency of monitoring, and the amount of
data is also increasing. The demand for energy storage data communication is
increasing, so high-speed communication is required. The degree of modularity is
getting higher and higher. BMS analysis technology based on big data is becoming
more and more convenient, especially after the integration of three stations
into one. Algorithms based on AI artificial intelligence data models are
conducive to convenient acquisition of computing resources. ?PCS:
Millisecond-level rapid response Ruan Peng said that there are increasing
demands for the application of energy storage transient characteristics. The
energy storage system has several important features: 1. Rapid response
capability. The PCS device can respond in milliseconds. 2. Precise control, the
entire output power must be controlled very precisely. From the perspective of
PCS technology trends, due to the relatively large scale of power grid
technology synchronization, precise synchronization control technology is very
important. The technical level of intelligent safety warning and control does
not start from the perspective of a single device, but must be integrated with
BMS and EMS to form a complete system for safety warning and control. At the
same time, multi-machine parallel resonance suppression technology, virtual
synchronization technology, high-tech manufacturing technology, etc. are all
future technology exploration directions for energy storage PCS. EMS:
Forward-looking technology trends include dual network architecture of real-time
control network and high-speed big data network; dynamic update technology of
operating parameters; networked model technology; virtualized resource operation
mode; multi-site integration EMS system technology, etc. On June 20, the "2019
GaoGong Energy Storage Conference" hosted by GaoGong Lithium Battery and GaoGong
Industrial Research Institute will be held grandly at the Dunhill International
Hotel in Baoan, Shenzhen. By then, 300+ heavyweight companies in subdivisions
and 500+ corporate executives will also conduct in-depth discussions on the
progress, application challenges, and development directions of the domestic and
overseas energy storage markets. Industry insiders are welcome to sign up and
participate.
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