Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A simplified electro-chemical lithium-ion battery model applicable for
  in situ monitoring and online control   The penetrations of lithium-ion batteries in transport, energy and
communication systems are increasing rapidly. A meticulous model applicable for
precise in-situ monitoring and convenient online controlling is in sought to
bridge the gap between research and applications. This paper proposes a
simplified electro-chemical model and its discrete-time state-space realization
derived from the pseudo-two-dimensional model. The solution-phase migration and
solid-phase diffusion dynamics with varying parameters are captured and
rigorous mathematical expressions of reaction rate distribution and terminal
voltage are derived. A simulation framework including initializing, stabilizing
and closed-loop correcting schemes with low computation cost are designed.
Numeric experiments on different types of batteries in various operating
scenarios are conducted for validation.

37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph