What does the 402030 polymer battery state include? The relationship between various 402030 polymer battery state estimates

What does the lithium-ion 402030 polymer battery state include? The relationship between various lithium-ion 402030 polymer battery state estimates. The aging of lithium-ion batteries is a long-term gradual process, and the 402030 polymer battery health state is affected by many factors such as temperature, current rate, and cut-off voltage. At present, there have been certain results in the research and modeling analysis of the health state of lithium-ion batteries. Related research includes lithium-ion 402030 polymer battery degradation mechanism and aging factor analysis, lithium-ion 402030 polymer battery health management, lithium-ion 402030 polymer battery state monitoring and estimation, lithium-ion 402030 polymer battery life prediction, etc.

1. What does the lithium-ion 402030 polymer battery state include?

The lithium-ion 402030 polymer battery state includes 402030 polymer battery temperature, SOC (state of charge estimation), SOH (state of health estimation), SOS (safety state estimation), SOF (functional state estimation) and SOE (available energy state estimation).

Ideal state of lithium-ion batteries: The lithium 402030 polymer battery ambient temperature is more suitable at around 20°C, at which time the 402030 polymer battery discharge and charging performance can be maximized.

If the 402030 polymer battery is to be idle for a long time, it must be charged to about 40% before being idle; because of this, when the 402030 polymer battery leaves the factory, the 402030 polymer battery factory basically charges it to 40% before leaving the factory; the lower the temperature of the idle 402030 polymer battery, the slower the aging, but it should not be lower than -40℃.

2. The relationship between various state estimates of lithium-ion batteries

Lithium-ion 402030 polymer battery temperature estimation is the basis for other state estimations. SOC estimation is affected by SOH. SOF is determined by SOC, SOH, SOS and 402030 polymer battery temperature. SOE is related to SOC, SOH, 402030 polymer battery temperature and future working conditions. The state of charge, energy state, remaining energy and health state of lithium-ion batteries are all invisible states of the 402030 polymer battery and cannot be directly obtained by measuring equipment.

Temperature has a great influence on 402030 polymer battery performance. At present, only the surface temperature of the 402030 polymer battery can be measured, and the internal temperature of the 402030 polymer battery must be estimated using a thermal model; the suitable operating temperature of lithium-ion batteries is 15~35℃, while the actual operating temperature of electric vehicles is -30~50℃, so the 402030 polymer battery must be thermally managed, heating at low temperatures and cooling at high temperatures.

Lithium-ion 402030 polymer battery SOH is one of the most important parameters in the 402030 polymer battery management system. Accurately mastering the 402030 polymer battery pack SOH can provide a basis for its own detection and diagnosis, help to timely understand the health status of each single cell of the 402030 polymer battery pack, replace the aging single cell in time, improve the overall life of the 402030 polymer battery pack, and further improve the power performance of electric vehicles.

Lithium-ion 402030 polymer battery SOH characterizes the current 402030 polymer battery's ability to store electrical energy relative to a new 402030 polymer battery. It expresses the state of the 402030 polymer battery from the beginning to the end of its life in the form of a percentage, and is used to quantitatively describe the current 402030 polymer battery performance state; lithium-ion batteries have many performance indicators, and SOH has multiple meanings at home and abroad, and there is a lack of conceptual unity. At present, the meaning of SOH is mainly reflected in several aspects such as capacity, power, internal resistance, number of cycles and peak power.

Lithium-ion 402030 polymer battery SOC designs a state of charge estimation observer for power lithium batteries. The measured current and voltage values are used as the input and observation value of the observer respectively, and the 402030 polymer battery state of charge in the observer is estimated by combining the dual adaptive attenuated extended Kalman filter.

Lithium-ion 402030 polymer battery state of energy SOE represents the ratio of the energy that can be released under the current conditions of the 402030 polymer battery to the maximum available energy of the 402030 polymer battery, and is an important indicator reflecting the 402030 polymer battery energy usage. The estimation method of 402030 polymer battery SOE is different from SOC. It is not only affected by the 402030 polymer battery load current, but also related to the 402030 polymer battery terminal voltage. During the use of lithium-ion batteries, when the 402030 polymer battery temperature and 402030 polymer battery charge and discharge rate change, the 402030 polymer battery discharge rate will change accordingly and affect the 402030 polymer battery SOE.

For electric vehicles, SOF can be defined as the power that the 402030 polymer battery pack can supply to various electrical loads such as motors at a specific time. It can be simply considered that SOF is a function of SOC and temperature. In fact, for the power systems of many electric vehicles, BMS not only estimates the power SoF output by the 402030 polymer battery pack at a specific time, but also provides the maximum power SoF2 allowed for the 402030 polymer battery pack to be charged.

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