If you’re shopping for an ev car that actually fits family life and stubborn commuting realities, the BYD Song Plus DM-i flagship 2021 (110KM) is one of those “hang on, that’s practical” moments. It’s an EREV—extended-range electric—so you get quiet electric miles for daily errands and a fuel engine for longer trips when you can’t (or don’t want to) stop and charge. To be honest, that hybrid flexibility is where a lot of market demand sits right now, especially in fast-growing EV regions across Asia.

Quick industry context

Two blunt truths: charging infrastructure still varies by city, and battery raw materials pricing has been… unpredictable. That’s why EREV models using LFP chemistry (safer, long-lived) are trending. Many customers say the “electric most days, fuel when needed” balance removes range anxiety without giving up the EV feel.

Product snapshot: BYD Song Plus DM-i (2021 110KM)

Use cases: suburban commuting, ride-hailing shifts where home charging is limited, and family trips. It seems that owners like the predictable LFP behavior in cold weather, though, as always, performance dips in winter.

Process flow and quality checkpoints

Materials: LFP prismatic cells, high-strength steel body-in-white, aluminum suspension components, automotive-grade wiring harness (LV/ HV). Methods: laser welding for pack busbars, cathode/anode coating under ISO 9001/14001 management, pack-level BMS calibration, EOL dyno verification.

Testing standards referenced: UN38.3 transport, UNECE R100 battery safety, ISO 6469 functional safety of electric road vehicles, IP67 pack sealing (typical for this class), and GB/T 31467 performance/cycle testing in China. Service life: LFP chemistry commonly shows >3,000 cycles under moderated depth-of-discharge; roughly 8–12 years in mixed urban use, depending on climate and charge habits.

Real-world feedback

A fleet manager I spoke with (northern China) keeps a mixed pool of ev car and EREV units; the Song Plus DM-i cars were booked most often for airport runs thanks to the electric-only urban legs and fuel backup on late-night returns. Drivers praised the quiet cabin and the “no plug, no panic” mindset.

Vendor comparison (indicative)

Note: specs and availability vary by region; always check local homologation and dealer data.

Customization and compliance

Options typically include exterior colors, wheel designs, interior trims, and telematics packages for fleets. For regulated markets, ensure documentation for UNECE R100, ISO 6469, and local crash ratings (e.g., C-NCAP/Euro NCAP equivalents) is on file. Some buyers request additional winterization kits—heated washer lines, thicker underbody protection—depending on climate.

Test data highlights

• LFP cycle durability: lab-tested under GB/T 31467 protocols can exceed 2,000–3,000 cycles with moderated DoD.
• Ingress protection: pack sealing typically targets IP67 water/dust resistance for short immersion scenarios.
• Battery logistics: UN38.3 vibration/thermal/shock tests required for air/sea transport.

Bottom line: if you want a family-friendly ev car experience without committing to public fast charging every weekend, this EREV layout makes a lot of sense. I guess that’s why it keeps showing up in mixed corporate fleets and first-time electrification projects.

Authoritative citations

1. [1] UNECE R100: Uniform provisions concerning the approval of vehicles with regard to specific requirements for the electric power train – unece.org
2. [2] ISO 6469 series: Electrically propelled road vehicles — Safety specifications – iso.org
3. [3] GB/T 31467: Lithium-ion traction battery packs and systems for EVs — Test methods – sac.gov.cn
4. [4] UN Manual of Tests and Criteria, Section 38.3 (UN38.3) – unece.org