Saft evolion, Техническое руководство

Страница: 3 / 42

4
The Saft Evolion® is suited for many different applications and environments and its compact size and high energy density allow it to
deliver the highest performance from a smallest volume and weight. The Evolion offers a unique combination of high float charging life
and high cycling performance in the same technology.
The Evolion is a Li-ion battery system. The battery system or module includes two main parts, a Li-ion cell pack and electronics. Both
combine together to make a smart battery module. The module operates in a single package and as a standalone 48 Vdc unit. It can
communicate to/from the application (dry contact signal and RS485 transmission bus) and can report its status using the user friendly
Saft DiagWinBMS communication kit.
This manual gives the technical features, operating characteristics and operating limits of the Saft Evolion module when it is applied in
standby applications and frequent cycling applications.
1. Introduction
2. Electrochemical principles
The electrochemical pack of Li-ion cells is the heart of the module. The cells use the NCA (Nickel Cobalt Aluminum) electrochemistry.
NCA refers to the active material mixture of the positive electrode. The mixture includes metal oxides in a composition of LiNi
X
Co
y
Al
z
O
2
,
hence, a Nickel Cobalt Aluminum mixture or NCA.
The positive electrode stores lithium ions through intercalation during discharge. The negative electrode is composed of graphite
active material. It stores lithium ion through intercalation during charge. Refer to Figure 1.
Figure 1. The reaction mechanism of the lithium-ion cell.