Ebike fires

[vickster]

Because it's London. It's far easier and usually quicker for deliveries to be done by bike. Less so out in the sticks where I live (Medway).
Every now and then on my commute into work. I've seen Police stings on e-bikes. But it's a rare occasion.

Border Force get involved too...

 

[markharry66]

Because it's London. It's far easier and usually quicker for deliveries to be done by bike. Less so out in the sticks where I live (Medway).
Every now and then on my commute into work. I've seen Police stings on e-bikes. But it's a rare occasion.

Seen the pizza delivery bikes on Facebook market place usually under fake accounts, see all you need to know about deregulated bikes that can top out at 40 plus miles per hour and the poor sods who have to drive them to earn a living they are a death trap.

 

[albion]

WOW - I worked on a research project about those batteries in about 1980 when I was in my final year of my degree
spent a lot of time experimenting with liquid Sodium - which was "fun"

at the time they were being put forward as batteries to run main line trains if they could be got working

nice to see them finally looking like they could be useful!

 

[albion]

CHINA Key Requirements & Communication Features

• Mandatory Charger-Battery Talk: The battery must digitally communicate with the charger before charging begins to confirm compatibility and safety.
• Real-time Monitoring: BMS must provide real-time data on voltage, current, and temperature, enabling intelligent shutdown if irregularities are detected.
• Anti-Tampering & Identification: Batteries, chargers, and controllers must be interoperable and secure, often involving digital signatures to prevent illegal modification of speed limits.
• Data Traceability: A mandatory China Compulsory Certificate (CCC) system requires QR codes on batteries for traceability of production, preventing the use of unsafe, uncertified components. [1, 2, 3, 4, 5]

BMS Communication Protocols

• UART/RS485/CANbus: These are commonly used protocols in modern "smart" BMS units—like those from DALY BMS—to allow communication between the battery, charger, and motor controller.
• Bluetooth and IoT: Smart BMS units are increasingly incorporating Bluetooth and WiFi to allow users to monitor battery status via smartphone apps (e.g., XiaoXiangElectric Smart APP), facilitating remote diagnostics and Firmware Over-The-Air (FOTA) updates. [1, 2, 3, 4, 5]

Plus, the ebike battery fire safety regulation GB 38031-2025 is mandatory July meaning proactive cell monitoring will be mandatory, probably moving them towards the safety of cars and quality battery storage.

 

[presta]

Having a battery management system doesn't necessarily mean the system is managing the battery though:

View: https://www.youtube.com/watch?v=wG6W3hz8NMQ

 

[albion]

Yes, why those regs came in, BMS being a very misused term

"GB 38031-2025 is China's updated, highly stringent mandatory national standard for electric vehicle (EV) traction battery safety, often referred to as the "no fire, no explosion" regulation. Published on March 28, 2025, it replaces the 2020 version and is widely considered the strictest EV battery safety requirement in the world"

 

[albion]

"Key Technical Updates & Tests (vs. 2020 Standard)
Added Internal Heating Test: A new testing method to simulate internal short-circuits rather than just external triggers.
Bottom Impact Test: New requirement for battery pack protection, ensuring no leakage, cracking, or fire after being struck, particularly relevant for cell-to-body designs.
Post-Fast Charging Safety: Batteries must pass safety checks after 300 rapid charging cycles (20%-80% SOC in \(\le 15\) mins).
Stringent Thermal propagation: The 2-hour no-fire rule applies even after severe internal defect simulations. [1, 2, 3, 4] "