Содержание
- 2. San Francisco New York Chicago Houston Time Capacity
- 3. Factors Battery capacity decreases over time and the main factor that affects the rate of battery
- 4. Temperature Stress factor S(T) We used a research paper and found that the stress factor for
- 5. S(T) modelling We use the temperature in the city of San Francisco to model temperature stress
- 7. Скачать презентацию
Слайд 2
San Francisco
New York
Chicago
Houston
Time
Capacity
San Francisco
New York
Chicago
Houston
Time
Capacity
Слайд 3
Factors
Battery capacity decreases over time and the main factor that affects
Factors
Battery capacity decreases over time and the main factor that affects
the rate of battery degradation is the ambient temperature. The effect of temperature on degradation has been well studied and modeled as a stress factor that accelerates the ongoing degradation process. Degradation processes are accelerated by Temperature Stress Model "S(T)" and SOC (state of charge) Stress Model S(σ).
We couldn’t find a reliable approach to measure S(σ) stress factor which takes specific gravity as inputs to aid in assessing the state of charge, so we decided to use temperature stress factors.
We couldn’t find a reliable approach to measure S(σ) stress factor which takes specific gravity as inputs to aid in assessing the state of charge, so we decided to use temperature stress factors.
Слайд 4
Temperature Stress factor S(T)
We used a research paper and found that
Temperature Stress factor S(T)
We used a research paper and found that
the stress factor for temperature is derived from the Arrhenius equation, which models the temperature dependence of the rate of a chemical reaction:
value of the temperature stress coefficient kT and values of the reference temperature Tref are defined in the research paper.
value of the temperature stress coefficient kT and values of the reference temperature Tref are defined in the research paper.
Слайд 5
S(T) modelling
We use the temperature in the city of San Francisco
S(T) modelling
We use the temperature in the city of San Francisco
to model temperature stress factor S(T).
In the graph we can observe:
temperature distribution
S(T) distribution
used to simulate factor values
and capacity decline.
In the graph we can observe:
temperature distribution
S(T) distribution
used to simulate factor values
and capacity decline.