What are the status of lithium solar cells? What is the relationship between the various states of lithium solar cells? The aging of lithium solar cells is a long-term gradual process, and the health of the battery is affected by various factors such as temperature, current rate, and cut-off voltage. At present, some achievements have been made in the research and modeling analysis of the health status of lithium solar cells. Related researches include lithium solar cell degradation mechanism and aging factor analysis, lithium solar cell health management, lithium solar cell status monitoring and estimation, and lithium solar cell status monitoring and estimation. life expectancy, etc.
1. What are the status of lithium solar cells?
Lithium solar cell states include battery temperature, SOC (state of charge estimate), SOH (state of health estimate), SOS (safe state estimate), SOF (state of function estimate), and SOE (state of available energy estimate).
The ideal state of lithium solar cells: the ambient temperature of the lithium battery is about 20 °C, and the battery discharge and charging performance can be maximized at this time.
If you want to leave the battery idle for a long time, you must charge it to about 40% before leaving the factory; because of this, when the battery leaves the factory, the battery factory is basically charged to 40% before leaving the factory; the lower the temperature of the idle battery, the slower the aging. But not lower than -40℃.
2. The relationship between the various states of lithium solar cells
Lithium solar cell temperature estimation is the basis for other state estimations. SOC estimation is affected by SOH, SOF is determined by SOC, SOH, SOS and battery temperature, and SOE is related to SOC, SOH, battery temperature, and future operating conditions. The state of charge, energy state, remaining energy used, and health state of lithium solar cells are all invisible states of the battery and cannot be directly obtained by measuring equipment.
Temperature has a great impact on battery performance. Currently, only the surface temperature of the battery can generally be measured, while the internal temperature of the battery needs to be estimated using a thermal model; the suitable working temperature of lithium solar cells is 15~35℃, while the actual working temperature of electric vehicles is -30 to 50°C, so the battery must be thermally managed, heating at low temperature and cooling at high temperature. export wooden box
