Lithium Sulfur Battery Chemistry Introduction
Lithium Sulfur battery chemistry is suitable Energy storage systems due to superior theoretical capacity, cost effectiveness and eco friendly
safety
10 things about SSBs that you are often not told
Author Dr. Simon Madgwick of Nuvvon Inc. As an overview, this post cannot cover every possibility or explain in depth. Nonetheless these 10 topics give a reasonable overview of solid-state batteries in terms of what is less transparent in the publicity and hype of solid state. To be clear, we need solid state batteries, but … Read more
Cell Level Fusing
When we connect cells in parallel to increase the capacity we might also want cell level fusing. This fusing being by definition designed to disconnect a cell that for some reason is sinking or delivering high currents. The fusing can be inside the cell and sealed or external to the cell, sometimes both internal and … Read more
Battery Management System
Batteries are the heart of an Electric Vehicle but the Battery Management System is more like the brain which keeps the Heart pumping out electricity to the Motor safely and at required output. Electric
Temperature Limits of a Battery
There are a number of temperature limits of a battery cell, some harder limits than others. It is worth understanding these in general before looking at a specific cell. These temperatures will change with chemistry and by cell manufacturer, therefore, it is really important to use the limits as advised by the manufacturer. In addition … Read more
EUCAR Hazard Levels
The EUCAR Hazard Levels define the outcome of cell level safety testing. These levels are normally used to describe the outcome of tests such as overcharge as part of the cell specification. Description Description Classification Level & Effect 0 No effect No effect. No loss of functionality 1 Passive protection activated No defect; no leakage; … Read more
Thermal Runaway vs Electrical Energy
The energy released during Thermal Runaway versus the electrical energy stored in a battery. The energy released during Thermal Runaway (TR) versus the stored electrical energy. A number has been bandied around for a long time that the energy released in a TR event was 2 to 6 times the electrical energy stored in the … Read more
EV Current Sensors: The Basics
EV current sensors are basic components. They perform two major tasks. They help us to know how much energy we use. Also, the second task is avoiding overcurrents. Therefore, current sensors are a major sub-systems of a battery design. EV current sensors can include resistive or magnetic elements based on their structure. We use these … Read more
Cell Internal Short Circuits
Although very rare, cell internal short circuits are a leading cause of battery thermal runaway. They are a major safety issue for any application of a battery pack. Hence there is a requirement to prevent them and to detect them. Common hazards of battery thermal runaway include toxic off-gassing, smoke, fire, and even an explosion. … Read more
How to select EV Fuses
The fuse selection procedure is very similar to contactor selection and complementary parameters help to select EV fuses. Fuse datasheets include breaking current-time characteristics. Some of the fuse manufacturers also provide thermal and mechanical characteristics. Thermal and Mechanical Specifications Fuses are simple busbars with melting elements inside. Therefore, the initial step is always to define … Read more