This experiment is based on a user scenario in which a vehicle that is already out of warranty shows BMS a079 symptoms, and the owner tries to continue using the car as stably as possible while accepting a certain level of inconvenience. It has now been five weeks since the BMS a079 phenomenon was first detected. So far, the BMS a079 error code has still never appeared. At around week 3, the battery condition worsened slightly. So, we limited the charging level to 60% and cap

This experiment is based on a user scenario in which a vehicle that is already out of warranty shows BMS a079 symptoms, and the owner tries to keep using the vehicle as stably as possible while accepting a certain level of inconvenience. This is the third-week result since the first detection of the BMS a079 phenomenon. So far, the BMS a079 error code has not actually occurred. In last week’s middle graph, the cell voltage deviation widened up to 0.09 V. Starting this week, h

These days, because of recent Tesla issues, many people say things like “using cylindrical cells was a mistake” or “Tesla had no choice but to use them.” That might have been true long ago when prismatic and pouch cells were not widely available. But even today, choosing a cell type is far from a simple decision. In battery pack design, there is always a trade-off. Safety, energy density, manufacturing complexity, and cost are all interconnected, and the outcome depends on wh

This is the second week’s result since the first detection of the BMS a079 phenomenon last week. So far, the BMS a079 error code has not yet appeared. As shown in the left graph, even under the same charging conditions, the maximum cell deviation remains around 0.05 V, similar to last week. However, in the right graph, the maximum deviation has increased significantly to about 0.08 V. This difference is also clearly visible in the statistical data. While it’s possible to redu

Many consumers judge the condition of a used car only by age and mileage. However, for electric vehicles, the most accurate indicator of...

Model Y: In this graph, the battery heater does not activate. The temperature rise is gradual and caused only by the thermal load from...

Previously, you could only review data from your most recent session . Now, we’ve expanded the feature so you can analyze battery and...

Some owners believe that the battery management system (BMS) is designed solely to maximize battery life. In reality, this is not the...

Recently, there have been cases where some users continue operating their systems after an error code appears by performing a reset on...

Tesla owners often assume that if their vehicle isn’t driven frequently, their battery isn’t deteriorating. In reality, lithium-ion...

Usable State of Charge (SOC) Definition:  Usable SOC  is the battery percentage that reflects the usable energy available for driving, as...

How Tesla Calculates Usable vs. Rated SOC and Range Estimates (Summary) 1. Usable State of Charge (SOC) Definition: Usable SOC shows the...

The motivation for this article on Tesla batteries arose from common user queries regarding the accuracy of SoH measurements based on...

The reason I started looking into this is that I’ve recently seen many posts about Tesla battery replacements. I wanted to compare that...

Many EV owners today are increasingly aware of battery management—how to charge, when to fast charge, and how to extend battery life....

This article aims to address widespread misconceptions about Tesla battery management, specifically regarding supercharging  and battery...

Batteries have become the unsung workhorses of modern life, powering everything from smartphones to electric cars. The lithium-ion...

This guide outlines 10 common charging issues  faced during both AC (1–5)  and DC fast charging (6–10) , along with their causes and...

We introduced Tesla real-time charging monitoring after recognizing that many users experience issues such as charging compatibility...

Average predicted State of Health (SOH) for Tesla vehicles by model year, based on standardized odometer readings (10,000, 50,000,...