Currently most battery management systems use simplistic empirical based models because they can be solved in real time, but these models limit the battery’s ability to be fast charged. Unfortunately measuring the internal states of the battery is very difficult in situ and therefore requires modeling to accurate monitor these in real time.īattery models range from computationally fast empirical based models that can quickly accumulate error to extremely accurate kinetic Monte Carlo surface simulations which take weeks to run for only a few cycles. If the internal states of the system were well known more aggressive charging rate could be applied as long as the monitored states remained within safe levels. While there are many problems associated with fast charging, the biggest problem is current battery management systems inability to accurately measure the internal states of the battery during period of quick charging. Unfortunately measuring the internal states of the battery is very difficult in situ and therefore requires modeling to accurate monitor these in real time.
Also, because of diffusion and kinetic limitations, increasing the charge rates can lead to mechanical stress build up and failure within the battery. Additionally, these rates can increase the side reactions occurring within the battery leading to increased resistive layer growth reducing the capacity of the battery. High rates can lead to increased internal battery temperature leading to degradation and thermal runaway. Increasing charging rates will give rise to additional phenomena that can be prohibitive to battery performance and life. While charging batteries at a high rate will push more charge into the battery, the answer to meeting both these demands is not as simple as applying the highest charging rate as possible. Note: Clamping the battery too tightly in place and compressing the pad may decrease the pad’s effectiveness.Ĭaution: This product may excrete oil and stain certain surfaces and is recommended for placement in battery trays or boxes only.To go directly to the video demonstration, click here.īattery users typically desire two objectives when charging their batteries: 1)Store as much charge as possible 2)Store that charge in the quickest amount of time possible. This condition reduces the flow of amps which are required to power electrical components.Īnother cause of performance fading is the physical collision of battery plates as a result of shock and vibration. This condition causes a short in a cell or cells. This also, may cause a battery to have low voltage and insufficient power.
Scientific explanation: When a battery is subjected to extreme vibration and shock, cracks occur at the interface of mechanical joints inside the battery and its cells. While some batteries are designed to withstand these forces better than others, all batteries can be damaged by shock and vibration over time.īattery failure will often be preceded by performance fading. This is because the stress of shock and vibration causes micro fractures inside the battery which reduce internal conductivity and cause a battery to have low voltage. Over time, as the micro fractures continue to propagate in the battery’s conductive components, internal resistances increase.
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