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Recently, the State Grid Corporation science and technology project led by the China Electric Power Research Institute - the research on the coupling relationship between internal and external characteristics of lithium-ion batteries and the state evaluation system successfully passed the company's acceptance
.
This project is the first at home and abroad to conduct online
safety assessment technology research on large-scale battery energy storage applications based on the coupling relationship between internal and external characteristics of lithium-ion batteries.
For a long time, lithium-ion batteries with organic electrolyte systems have had safety problems in large-scale energy storage applications, and once thermal runaway occurs, it is easy to trigger a chain reaction and endanger system safety
.
Since the external characteristic parameters of the battery are difficult to accurately reflect the complex reaction inside the battery, and the safety of the battery will change with the aging degree of the battery, it is necessary to find the characteristic parameters that can accurately characterize the safety state of the battery and realize online detection, and establish a battery status evaluation system to achieve the monitoring and early warning
of battery safety.
The coupling relationship between internal and external characteristics and internal characteristics of lithium-ion batteries of State Grid is based on the study of the change trend of external characteristics and internal characteristics related parameters of the whole life cycle of the battery, and on this basis, the characteristic parameters and detection technical scheme
for online detection and evaluation of the safety status of large-scale energy storage batteries are preliminarily determined 。 The research results of the project have laid an important theoretical and practical foundation for the in-depth development of online evaluation technology for efficient and high-sensitivity energy storage battery operation status, put forward ideas for follow-up research and explored feasible technical routes, which are of great
significance to ensure the safe and reliable operation of large-scale battery energy storage systems.
Recently, the State Grid Corporation science and technology project led by the China Electric Power Research Institute - the research on the coupling relationship between internal and external characteristics of lithium-ion batteries and the state evaluation system successfully passed the company's acceptance
.
This project is the first at home and abroad to conduct online
safety assessment technology research on large-scale battery energy storage applications based on the coupling relationship between internal and external characteristics of lithium-ion batteries.
For a long time, lithium-ion batteries with organic electrolyte systems have had safety problems in large-scale energy storage applications, and once thermal runaway occurs, it is easy to trigger a chain reaction and endanger system safety
.
Since the external characteristic parameters of the battery are difficult to accurately reflect the complex reaction inside the battery, and the safety of the battery will change with the aging degree of the battery, it is necessary to find the characteristic parameters that can accurately characterize the safety state of the battery and realize online detection, and establish a battery status evaluation system to achieve the monitoring and early warning
of battery safety.
The coupling relationship between internal and external characteristics and internal characteristics of lithium-ion batteries of State Grid is based on the study of the change trend of external characteristics and internal characteristics related parameters of the whole life cycle of the battery, and on this basis, the characteristic parameters and detection technical scheme
for online detection and evaluation of the safety status of large-scale energy storage batteries are preliminarily determined 。 The research results of the project have laid an important theoretical and practical foundation for the in-depth development of online evaluation technology for efficient and high-sensitivity energy storage battery operation status, put forward ideas for follow-up research and explored feasible technical routes, which are of great
significance to ensure the safe and reliable operation of large-scale battery energy storage systems.
