Maximize the Energy from Long-Life Batteries

　　Maximize the Energy from Long-Life Batteries

　　电池寿命是无线传感器节点，将填充物联网产业发展的一个主要考虑因素（IIoT）。在许多应用中，传感器节点将需要安装在很难达到的位置，更遑论服务。传感器节点需要在能源方面的自主性，因为它是太昂贵和难以运行电力线，他们或有维修工人定期更换电池。

　　除了处理电子产品的低功耗外，电池本身还需要支持非常长的服务时间：可能长达20年。许多电池化学不能支持这样一个长期的使用寿命，即使当支持专门的低能量电子，因为它们的自放电率。

　　Lithium thionyl chloride chemistry， however， has a very low self-discharge rate. As a result， the chemistry provides the longest life and highest energy autonomy seen so far for primary battery technology that is suitable for IoT sensor nodes and other equipment where small size is important. The service life of the lithium thionyl chloride chemistry has been demonstrated over a period of close to 40 years. AA-size cells have exhibited a service life of more than 20 years in utility meters.

　　However， as the applications for long-lifetime battery-powered systems widen， it is important to take into account the characteristics of the lithium thionyl chloride chemistry. The addition of wireless communications to sensor nodes as well as actuation functions – such as the ability to open and close gas or liquid valves – increases the peak current required from the battery.