Complete Guide to LiFePO4 Battery QR Codes: The "Identity Code" and Compliance Key in a Small Space

Throughout the entire lifecycle of lithium iron phosphate (LiFePO4) batteries—from production and circulation to usage—the QR code on the cell or battery pack is not just an ordinary mark, but an "electronic ID card" carrying core product information. Whether for verifying authenticity in energy storage project procurement, production quality tracing, or compliance access to overseas markets, understanding the coding logic within this small space helps industry practitioners mitigate risks and improve efficiency. This article will comprehensively decode the core meaning and application value of LiFePO4 battery QR codes, combining current national standards and new overseas regulations.

I. Core Coding Basis for QR Codes: National and Industry Standards

Currently, QR codes for domestic LiFePO4 batteries comply with GB/T 34014-2017 "Coding Rules for Traction Battery Products for Electric Vehicles". This standard unifies coding structure and information dimensions to ensure cross-enterprise and cross-scenario traceability. GB/T 45565—2025 "Coding Rules for Lithium-Ion Batteries", released in May 2025 and officially implemented in November of the same year, further refines full-lifecycle traceability requirements. During the transition period between old and new standards, GB/T 34014-2017 remains the mainstream in the market, and buyers should pay attention to distinguishing coding versions during procurement.

For LiFePO4 batteries exported overseas, the EU's New Battery Regulation (EU 2023/1542) adds special requirements: industrial and energy storage batteries with a capacity exceeding 2kWh must have QR codes linked to the "Battery Passport" digital platform, carrying environmental information such as carbon footprint and recycled material content. Taking effect in July 2026, this directly affects the compliance of products entering the EU market.

II. Core Information Decoding of LiFePO4 Battery QR Codes (Per National Standard Structure)

National standard codes are generally divided into fixed fields and extended fields, with a total length of approximately 24 characters (slightly varying by manufacturer). The core information can be categorized into 6 types, and the complete content can be read using compliant decoding tools or manufacturer systems after scanning the QR code.

1. Manufacturer Code (Positions 1-3): Locating the Product Source

The first 3 characters are the nationally assigned unique manufacturer code, serving as the primary basis for verifying battery brand authenticity. Examples of mainstream LiFePO4 battery manufacturer codes:

• 001: Contemporary Amperex Technology (CATL)
• 03H: Gotion High-Tech
• 90: Honeycomb Energy
• 0B: China Innovation Aviation

This code enables quick verification of whether the battery comes from a legitimate manufacturer, avoiding the purchase of refurbished cells or products from unqualified small factories.

2. Product Type Code (Position 4): Distinguishing Hierarchy and Specifications

The 4th character (a letter) corresponds to the battery's packaging hierarchy, directly linking to application scenarios. Common codes:

• C: Single Cell (core unit for energy storage and traction batteries, e.g., 314Ah large-format LiFePO4 cells)
• M: Battery Module (composed of multiple cells in series/parallel, suitable for two-wheelers and small-to-medium energy storage)
• P: Battery Pack (PACK-level product integrated with BMS and protective structure, used in new energy vehicles and large-scale energy storage power stations)

For example, single cells procured for energy storage projects must have "C" as the 4th character in the QR code; a "P" indicates a finished battery pack, enabling quick confirmation of whether the product type matches requirements.

3. Battery Chemistry Code (Position 5): Specifying the Chemical System

The 5th character directly identifies the battery's chemical composition, serving as the key to determining if it is a LiFePO4 battery. Mainstream codes:

• B/E: Lithium Iron Phosphate (LiFePO4) – mainstream choice for energy storage, with excellent safety and cycle life
• E/V: Ternary Lithium Battery (NCM/NCA) – high energy density, mostly used for traction batteries
• G: Lithium Carbonate Battery – niche application in specific low-temperature scenarios

Note that there may be minor variations among manufacturers, but LiFePO4 batteries are generally coded with "B" or "E", allowing buyers to quickly screen the chemical system via this position.

4. Specification and Traceability Code (Positions 6-14): Manufacturer-Defined Information

This field is an extended manufacturer-defined area without unified national standard requirements. It usually includes cell specifications (capacity, voltage), production workshop, and production line number. For example, this field for CATL's 314Ah LiFePO4 cells may implicitly indicate capacity, while Gotion High-Tech may mark cell dimension parameters. Primarily used for internal manufacturer quality tracing, end-users can inquire about details through manufacturer customer service or decoding systems.

5. Production Date Code (Positions 15-17): Judging Age and Remaining Life

The production date is one of the most practically valuable pieces of information in the QR code. The coding rule is complex but can be accurately decoded, with core logic as follows:

• Year (Position 15): Represented by digits 1-9 and letters A-Y (excluding O, I, Q, S, Z to avoid confusion), starting from 2011 and cycling every 30 years. For example, "F" does not correspond to 2016 (2011+5); based on industry practice, "F" stands for 2025. The correct calculation rule is: Digit 1=2011, 9=2019, A=2020, B=2021,..., F=2025.
• Month (Position 16): Using hexadecimal notation – 1-9 correspond to January-September, A=October, B=November, C=December.
• Day (Position 17): Represented by digits 0-9 and letters A-Y (excluding confusing letters) – 0=31st, 1-9=1st-9th, A-Y=10th-30th.

Example: The code "F5F" corresponds to production on May 15, 2025. The production date helps judge battery age, avoiding refurbished used cells (usually those produced over 3 years ago), and estimate remaining lifespan (LiFePO4 batteries have a normal storage life of approximately 5-8 years).

6. Serial Number and Second-Life Code (Position 18 onwards): Unique Identification and Circulation Status

Positions 18-24 are the daily production serial number, unique to each cell (equivalent to the cell's "ID card"), enabling precise positioning of a single cell's production batch and quality records. Positions 25-26 are the optional second-life code, marked only on repurposed used batteries; new LiFePO4 batteries have no such code. This serves as an auxiliary basis for identifying refurbished batteries (note: some unscrupulous merchants may omit this code, requiring comprehensive judgment combined with production date).

III. QR Code Differences Across Hierarchies: Cell, Module, and PACK

QR codes for LiFePO4 batteries are not unified across all hierarchies and should be distinguished based on procurement scenarios:

• Cell-Level: Laser-etched on the cell surface (mostly near the poles), containing the most detailed information including all core fields above. It is the core basis for authenticity verification in energy storage project procurement.
• Module-Level: Optional QR code, linked to cell-level information. Primarily used for manufacturer module assembly tracing. Not mandatory under EU regulations but must be consistent with PACK-level QR code information.
• PACK-Level: Mandatory QR code (required by EU regulations). In addition to basic information, it must be linked to BMS parameters and safety certification numbers. Products exported to the EU must be additionally linked to the "Battery Passport" to display carbon footprint and recycled material content.

IV. Practical Tips: How to Decode and Avoid Pitfalls

1. Decoding Tools

Ordinary QR codes can be scanned with WeChat or Alipay to read basic text information. Manufacturer-specific codes require corresponding decoding tools (e.g., official mini-programs from CATL and EVE Energy) or decoding services from suppliers. EU "Battery Passport" QR codes must be scanned via the EU-designated platform to verify compliance information.

2. Pitfall Avoidance Tips

• Verify consistency between the manufacturer code and brand to avoid "counterfeit brand" cells (e.g., code 001 but not a CATL product).
• Combine production date with appearance: Cells produced over 3 years ago with surface wear are likely refurbished used products.
• For exported products, verify in advance whether the QR code meets target market requirements. For the EU market, confirm the completeness of "Battery Passport" information to avoid compliance risks.

V. Conclusion: Extending the Core Value of QR Codes

The significance of LiFePO4 battery QR codes goes far beyond "identification" — for buyers, it is a tool for authenticity verification, quality control, and tracing; for manufacturers, it is a carrier for full-lifecycle management; for overseas markets, it is a "green passport" for compliance access. With the implementation of GB/T 45565—2025 and new EU regulations, QR code information will become more comprehensive and dynamic, serving as a core pillar for the standardized and transparent development of the LiFePO4 battery industry.

As a professional lithium battery manufacturer, GSpowerT (www.gspowert.com) ensures all its LiFePO4 batteries strictly comply with national standard coding requirements, with exported products fully adapting to EU "Battery Passport" regulations. The QR code on each cell enables full traceability of production, compliance, and performance information, providing safe and reliable product guarantees for global energy storage projects.

Code Type

Field Position

Coding Rules/Examples

Key Notes

Manufacturer Code

1-3

001 (CATL), 03H (Gotion), 90 (Honeycomb Energy), 0B (China Innovation Aviation)

Nationally assigned unique code for authenticity verification

Product Type Code

4

C (Single Cell), M (Module), P (Battery Pack)

Identifies packaging hierarchy and application scenarios

Battery Chemistry Code

5

B/E (LiFePO4), E/V (Ternary Lithium), G (Lithium Carbonate)

Distinguishes chemical system; LiFePO4 mainly uses B/E

Production Date Code

15-17

Year: 1=2011, A=2020, F=2025; Month: A=Oct, B=Nov, C=Dec; Day: 0=31st, A=10th

Example "F5F" = May 15, 2025; avoid cells over 3 years old

Serial/Second-Life Code

18-24/25-26

18-24: Unique serial number; 25-26: Optional second-life mark (for repurposed cells)

New cells have no second-life code; auxiliary for anti-refurbishment

This table condenses the core QR code decoding logic, enabling teams to quickly verify key information during procurement and quality inspection. For EU-exported products, additional confirmation of Battery Passport linkage via the QR code is required to meet regulatory compliance.

GSpowerT (www.gspowert.com) has always held fast to our core mission: “Green Energy Empowers the Future; Safety Secures the Foundation”. We specialize in the R&D, manufacturing