● [V] 6 Verified
● [C] 9 Claimed
● [I] 4 Inferred
● [?] 3 Data Gaps
// CP-01 · Flash Charging · Mar 2026
BYD Claims 5-Minute Charging for Han L and Tang L
Manufacturer Claim
BYD official claim: adds 400 km CLTC range in 5 minutes at peak power. 2 km per second. Compatible with fast-charging infrastructure.
Engineering Reality Official claim only
Requires peak 600 kW or higher charger. Only 0.5% of China public network qualifies. At a typical 150 kW public charger, the same 400 km top-up takes 25-35 minutes, not 5.
⚠ Misleading
The 5-minute claim describes a peak performance envelope accessible to fewer than 1% of BYD owners on the 2026 public network. It is not a description of typical ownership experience.
// CP-02 · Flash Charging · Mar 2026
1,000V High-Voltage Architecture
Manufacturer Claim
BYD Han L and Tang L use a 1,000V electrical architecture. Backward compatible with existing 500V infrastructure at reduced speed.
Engineering Reality Independently verified
Confirmed in BYD product specifications. P = IV: at the same power, doubling voltage halves current, reducing heat by 4x. The physics are real. 1,000V vehicles charge on existing 150-500V chargers at reduced speed.
✓ Verified
Genuine engineering achievement. The 1,000V architecture is real, independently confirmed, and physically sound.
// CP-03 · Flash Charging · Mar 2026
Charging Infrastructure Availability
Manufacturer Claim
BYD Megawatt Flash Charging stations now in mass production as of February 2026. The charging ecosystem is ready.
Engineering Reality Independently verified
EVCIPA 2025 data: approx 35% of China network is AC slow under 7 kW, 45% is DC 30-120 kW, 18% is DC 120-250 kW. 500 kW+ chargers represent under 0.5% of total deployed units. Deployed MFC station count: DATA NOT AVAILABLE.
⚠ Misleading
In production is a manufacturing milestone, not a deployment milestone. The key question -- how many stations, where -- remains DATA NOT AVAILABLE.
// CP-04 · Flash Charging · Mar 2026
Blade Battery Longevity at High Charge Rates
Manufacturer Claim
BYD claims 3,000+ cycle life for Blade Battery. Cold-weather pre-conditioning system addresses low-temperature charging constraints.
Engineering Reality Official claim only
The 3,000+ cycle life figure is at standard 1C charge conditions only. Peer-reviewed literature shows LFP degradation accelerates at 3C or higher, especially below 20 degrees C. BYD Blade Battery cycle life at sustained 4C or higher: DATA NOT AVAILABLE.
? Data Gap
The most commercially significant data gap in this audit. Fleet TCO models built on standard 1C cycle life data are directionally wrong. BYD has not published this data.
// CP-05 · Flash Charging · Mar 2026
Cold-Weather Flash Charging Performance
Manufacturer Claim
BYD BMS pre-conditioning system heats cells before charging to improve ion diffusion rate at low temperatures.
Engineering Reality Official claim only
Pre-conditioning works in principle. Unresolved: does the 5-minute window shrink to 12+ minutes at -10 degrees C after pre-conditioning? BYD has not published this data. Blade-specific cold cycle life: DATA NOT AVAILABLE.
? Data Gap
For northeast China fleet operators, this is not a minor footnote. The specific temperature thresholds at which BYD BMS throttles charge rate have not been published.
// 800V / Flash Charging -- OEM Comparison
| OEM / Model | Architecture | Peak Power | Avg 10–80% | 0°C Rate | Source |
|---|---|---|---|---|---|
| BYD Han L / Tang L
Arch: 1,000V + LFP Blade | Peak: 1,360 kW peak | Avg: 5-6C effective | 0°C: Not published | Source: BYD Official
|
1,000V + LFP Blade | 1,360 kW peak | 5-6C effective | Not published | BYD Official |
| CATL Shenxing OEMs
Arch: Native 800V + LFP | Peak: 400 kW (4C) | Avg: 400 km in 10 min | 0°C: -10C capable | Source: CATL Official
|
Native 800V + LFP | 400 kW (4C) | 400 km in 10 min | -10C capable | CATL Official |
| Tesla Supercharger V4
Arch: 800V proprietary | Peak: 350 kW typical | Avg: 200 kW session avg | 0°C: Proven -20C | Source: Tesla Spec
|
800V proprietary | 350 kW typical | 200 kW session avg | Proven -20C | Tesla Spec |
| Huawei DriveONE
Arch: 600 kW claimed | Peak: 600 kW claimed | Avg: Not published | 0°C: Not published | Source: Huawei Claimed
|
600 kW claimed | 600 kW claimed | Not published | Not published | Huawei Claimed |
| NIO Battery Swap
Arch: 5-min swap | Peak: 1,000 kW effective | Avg: Independent of SOC | 0°C: Temperature irrelevant | Source: NIO Measured
|
5-min swap | 1,000 kW effective | Independent of SOC | Temperature irrelevant | NIO Measured |
Checkpoint: May 1, 2026
BYD Megawatt Flash Charging -- Deployed Station Count
Target: publicly announced nationwide rollout. Committed by BYD, Feb 2026. Verified deployed count: DATA NOT AVAILABLE as of Mar 2026.
BYD — DATA GAPS: WITHHELD BY OEM
[?]1
Blade Battery cycle life at sustained 4C or higher charge rate
BYD publishes 3,000+ cycle life at standard 1C. For flash charging, relevant rate is 4-6C. Peer-reviewed literature shows LFP cycle life degrades faster at 3C or higher, especially below 20 degrees C. BYD has not published — and appears commercially motivated not to publish — any data at sustained 4C charging.
IMPACT: Every TCO model for BYD flash charging fleets built on standard 1C cycle life data is directionally wrong. Underestimates degradation cost. Magnitude unknown.
BYD — DATA GAPS: WITHHELD BY OEM
[?]2
BYD warranty terms for ultra-fast charging battery degradation
BYD public warranty documents do not address ultra-fast charging degradation. If procuring for fleet use, request this in writing before signing. Dealers may not know the answer.
IMPACT: Fleet procurement with 8-10 year TCO models cannot accurately model battery replacement cost without this. Standard warranty may not cover routine high-rate degradation.
BYD — DATA GAPS: WITHHELD BY OEM
[?]3
BYD Megawatt Flash Charging deployed station count and locations
February 2026 announcement confirms hardware production began. Nothing published about how many stations exist, where they are, or when coverage reaches commercial viability on any specific route.
IMPACT: Route planning for fleet applications requiring flash charging is impossible without location data. In production is not a route map.
// Download Full Report
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BYD Flash Charging -- Full Engineering Audit Report
49-page physics-first analysis: C-rate correction, full use case matrix, TCO model framework, practitioner guidance for fleet procurement, and all 3 unresolved data gaps.