EV Batteries

[inlinesix]

On 5/28/2026 at 3:32 PM, Matoonia said:

I got xtool from this company https://chargeandgo.io/

But i think there are also quite a few battery health check providers like https://www.sgcarmart.com/shop/privilege/2057-vicom-evhybrid-batteryfit-check-in-collaboration-with-best

https://www.p-up.tech/sg

 

FYI

Xtool reads the data from BMS.

Aviloo Premium collect raw data while the car is in use to analyse.

[Mkl22]

On 5/28/2026 at 3:32 PM, Matoonia said:

I got xtool from this company https://chargeandgo.io/

But i think there are also quite a few battery health check providers like https://www.sgcarmart.com/shop/privilege/2057-vicom-evhybrid-batteryfit-check-in-collaboration-with-best

https://www.p-up.tech/sg

 

Which model of xtool did you get. 

Edited May 28 by Mkl22

[Matoonia]

On 5/28/2026 at 3:48 PM, inlinesix said:

FYI

Xtool reads the data from BMS.

Aviloo Premium collect raw data while the car is in use to analyse.

Oh I see so Aviloo will be more objective/accurate since they pull raw data? 

[Matoonia]

On 5/28/2026 at 4:00 PM, Mkl22 said:

Which model of xtool did you get. 

Hmm i not sure about that but it's from https://chargeandgo.io/ 

[inlinesix]

On 5/28/2026 at 4:07 PM, Matoonia said:

Oh I see so Aviloo will be more objective/accurate since they pull raw data? 

Maybe.

But it takes at least 7 days to test from 100% down to 10%

[steveting99]

On 5/28/2026 at 3:32 PM, Matoonia said:

I got xtool from this company https://chargeandgo.io/

But i think there are also quite a few battery health check providers like https://www.sgcarmart.com/shop/privilege/2057-vicom-evhybrid-batteryfit-check-in-collaboration-with-best

https://www.p-up.tech/sg

 

Thanks for this. Here in Singapore, looks like Pup offers Aviloo's SoH battery test for BEVs/PHEVs and 3rd party certification at $198. About 1/3rd more than what's offered over the causeway. 

Worth spending to get peace of mind to know the health status on the most expensive item of a BEV.

Edited May 29 by steveting99
typo

[Matoonia]

On 5/29/2026 at 9:09 AM, steveting99 said:

Thanks for this. Here in Singapore, looks like Pup offers Aviloo's SoH battery test for BEVs/PHEVs and 3rd party certification at $198. About 1/3rd more than what's offered over the causeway. 

Worth spending to get peace of mind to know the health status on the most expensive item of a BEV.

Yes cos if you want to do PPI the dealer also won't allow to bring over to msia to test. So do with P-UP for $198 for peace of mind is the best, especially if they offer on-site the dealer dun even need to drive to workshop. This is also around the same if you bring to VICOM or STA for the normal PPI. 

[steveting99]

Would think some Volvo EX30 owners or future potential owners would be interested in the Aviloo's SoH battery test to check if the high voltage battery pack is okay.

In Singapore, Wearnes Auto has notified 194 Volvo EX30 owners on the battery defect risk according to Straits Times article here: https://www.straitstimes.com/singapore/transport/volvo-ev-recall-due-to-battery-fire-risk-widens-affecting-58-more-owners-in-spore. Globally about 33,802 Volvo EX30 vehicles are affected on the battery defect and owners are told to limit their charging to no more than 70%.☹️

Over in Thailand, two Volvo EX30 vehicles have had thermal runaway events (battery fire) as reported here: https://www.businesstimes.com.sg/companies-markets/transport-logistics/thai-watchdog-sue-volvo-cars-over-ex30-fires-consumers-demand-refunds. Thailand’s consumer watchdog is now suing Volvo on the battery fires. 

[mersaylee]

Meanwhile...our consumer watchdog...is still watching...like a lizard...nothing to watch...😴

[steveting99]

Been reading up on Aviloo's website on what they do. Interesting to say the least. AVILOO claims:

1. That it performs an independent assessment/calculation of the battery’s State of Health (SoH), rather than relying on values extracted from the vehicle's Battery Management System (BMS) itself. Thus, it's an objective and accurate assessment that cannot be achieved through standard methods.
2. They carry out benchmarking, so that customers receive a valid assessment of how their BEV/PHEV's battery compares to other batteries in similar vehicles. 
3. They have the broadest coverage with over 96% of common electric and plug-in hybrid vehicles (EVs and PHEVs) on the market.

So the question: What Is State of Health (SoH)?

SoH indicates the condition of an EV high voltage battery compared to its original state. However, it’s not a direct measurement, it’s calculated. And here’s the challenge:

• There are different reference values and calculation methods in existence, leading to inconsistent results.
• Buyers of BEVs often rely on SoH without understanding what it truly represents.

There's two general ways to calculate SoH.

(a) Capacity SoH method, which is based on remaining capacity in ampere-hours (Ahr).

• Pros: Simple concept, theoretically independent of temperature and driving style.
• Cons: Ignores internal resistance, often overestimating range, especially in older vehicles.☹️

(b) Energy SoH method, which measures usable energy in kilowatt-hours (kWhr).

• Pros: Directly linked to range. Example: 90% energy SoH means 90% of the original range is still available.👍
• Cons: Complex calculation influenced by temperature and load profile. AVILOO claims they've standardizes this using the WLTP cycle at 25 °C.

SoH can be calculated at the battery pack level or individual battery cell. The battery pack level analysis is quick but imprecise, only rough estimates.😶 While cell level analysis provides higher accuracy, as it evaluates each individual cell and its balancing status.😀

There are two common approaches when doing cell level analysis. 

(i) Average Cell analysis: Widely used but inaccurate, as it overlooks weak cells.🤯

(ii) Weakest Cell analysis: The most precise, similar to the weakest link in a chain in determining overall strength.

AVILOO claims they use the energy SoH method (kWhr) down to the individual cell level, based on the internationally recognized GTR22 standard. The reasons being:

• Measures usable energy under defined conditions;
• Uses the weakest cell for calculation;
• Provides transparent, traceable, and independent results.

Looks like one can order the kit directly from AVILOO for about 400 Euros (plus shipping and any taxes) and each Flash test costs 35 Euros, while each Premium test costs 45 Euros. Link is here: https://shop.aviloo.com/en-us/b2b. Much cheaper than doing it locally or going across the causeway to do the test.

Thinking a few MCRers who own a BEV can do a group buy and share the costs of the kit and each pay for an individual test - depending on when he needs it.

Edited May 29 by steveting99
additional text

[steveting99]

Aviloo's Sate of Health (SoH) independent battery certificate is shown below.

Aviloo's certified test results solves several issues.

(1) Can get an individual ride's battery pack status at a point in time / distance travelled;

(2) Lack of manufacturer's test data or unwillingness by Principal/AD to provide the battery curve;

(3) Benchmarking against other rides;

(4) Keep the AD honest on their battery warranty. Can no longer BS or act blur.; 

(5) Can plot the battery degradation curve of the ride over time and make a claim if a battery cell fails prematurely; and

(6) Ability to resale the ride for a reasonable price rather than be low balled by the dealer.

Source from Aviloo is here: https://aviloo.com/en-us/aviloo-certified

[steveting99]

Article from InsideEV's Andrei Nedelea discussion with Davide Giacobbe, the co-founder and CEO of Voltest - a company specializing in EV battery testing for car dealerships in the US of A. Article is about "What Ultra-High-Mileage EVs Teach Us About Battery Degradation" with a focus mostly on Tesla vehicles.

A major innovation to the longevity of the battery pack is the provision of liquid cooling. Battery packs with air cooling did not do so well (has far more degradation) compared to battery packs that have liquid cooling. 

LFP outlasts NMC, no surprise there due to the chemistry and the ability to charge to 100%.

Concluding remarks by Giacobbe is that he was surprised at how well EV battery packs are faring over hundreds of thousands of miles. His company has tested vehicles with 300,000 miles (482,800 kms) on the odometer and found that some still retained around 75% of their battery capacity. "That is impressive. That is almost 500,000 kilometers,” he said. “I challenge you to do 500,000 kilometers in an internal-combustion car."

 

 

[steveting99]

Looks like Donut Labs solid state battery is scam - based on the investigations carried out by Ziroth and in discussions with 20 other battery experts. The following YouTube video by Ziroth is here:

1st piece of evidence comes from the voltage curves by VTT tests. These match the high-nickel lithium-ion (NCM) chemistry, with the cell operating at 3.7V to 3.8V at 50% state of charge. In contrast, sodium-ion cells typically do not exceed 3.5V at the same charge level.

The 2nd piece of evidence comes from battery cell expansion data by VTT. When charging, lithium-ion cells with graphite anodes display a distinctive kink in their expansion curve between 50-70% state of charge. The Donut Lab cell exhibited this exact pattern, confirming the presence of a graphite anode and, therefore, lithium-ion chemistry. 

Data source from The Electric Viking article here: https://theelectricviking.com/donut-labs-solid-state-battery-revealed-standard-lithium-ion-expert/  

Edited June 9 by steveting99
additional text

[steveting99]

Two new national standards are being rolled out on 1-Jul-2026 for all Made in China (MiC) Battery Electric Vehicles (BEVs).

(1) Safety Requirements for Electric Vehicles (GB18384-2025). Provision of a physical "kill switch" to cut of power to the batteries. This is to aid first responders to extract driver/passengers in the event of a severe collosion.

(2) Safety Requirements for Power Batteries for Electric Vehicles (GB38031-2025). The new battery standard raises the bar for safety performance. Key updates include:

• Thermal safety: Requirements have shifted from providing a thermal event alarm 5 minutes before fire or explosion to ensuring no fire or explosion occurs, while still requiring alarm signals. Additionally, smoke must not cause harm to occupants.
• Structural integrity: A new bottom-impact test has been introduced to evaluate the battery’s protective capabilities against underbody collisions.
• Durability: A new safety test following 300 fast-charging cycles requires that batteries remain free of fire or explosion during subsequent external short-circuit tests.

Both CATL and BYD's 2nd generation Blade Battery 2.0 claim to have met GB38031-2025.

Data source is from ArenaEV article here:  https://www.arenaev.com/china_overhauls_ev_regulations_with_tough_mandatory_fire_safety_standards-news-5983.php

Both standards will improve the safety of BEVs in the long term and expected to reduce fire risk compared to ICE rides by an order of magnitude. 

Simple question to ask the Sales Executive (SE) when looking at a new BEV ride. Does it comply with GB18384-2025 and GB38031-2025? If the SE looks dumb or tries to play punk, let the SE know the ride is unsafe and its time to move on to the next one.

[steveting99]

New technical guideline called GB/T 43568-2026 which comes into affect on 1 July 2026, establishes clear chemical boundaries for solid-state battery classifications. 

• Any battery containing between 5% and 20% liquid electrolyte is categorized as a hybrid battery system;
• An all-solid-state cells must drop below the 5% liquid electrolyte threshold while maintaining specific thermal mass stability under vacuum conditions specified on 30 30 December 2025, the National Automotive Standardization Technical Committee published “Solid-State Battery for electric vehicle – Part 1: Terms and Classification”. To qualify as an all solid-state battery, the weight loss rate must not exceed 0.5% under specific vacuum drying conditions

Data source is from Car News China here: https://carnewschina.com/2026/06/23/catl-and-byd-lines-solid-state-standard-exposes-8-73-billion-usd-equipment-illusion/ and https://carnewschina.com/2025/12/31/china-introduces-first-national-standard-for-solid-state-batteries-for-public-comment/.