description: DINWEYS manufacturing and quality control — the Chengguang Power Tech production process, on-site laboratories and five-stage QC behind every truck battery. type: article date_published: 2026-09-12 date_modified: 2026-09-12 faq: - q: Where are DINWEYS batteries manufactured? a: DINWEYS batteries are manufactured by Chengguang Power Tech Co., Ltd., a battery maker founded in 2002 in Jinzhou City, Shijiazhuang, Hebei Province, China. The facility spans 200,000 m² with 18 automated assembly lines and exports to 70+ countries. - q: What quality system does the factory run? a: The factory runs under an IATF 16949 automotive quality management system, supported by ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, OHSAS 18001 and CE Marking. - q: How are batteries tested before shipment? a: Every batch is verified in five on-site laboratories (chemical, physical, electrical, life-cycle and environmental) and passes a five-stage QC chain: incoming inspection, in-process QC, finished-product testing, pre-shipment audit and batch traceability. - q: What documentation ships with a DINWEYS order? a: Per-batch Certificate of Analysis (COA), MSDS, inspection reports (CCA, RC, visual, leak), and Certificate of Origin. Third-party lab testing (SGS, TÜV, BV) is available on request.
How DINWEYS Batteries Are Made & Tested¶
TL;DR — DINWEYS is produced end-to-end by Chengguang Power Tech Co., Ltd., a manufacturer founded in 2002 that controls the full chain from plate manufacturing to testing and packaging. Every batch passes five on-site laboratories and a five-stage quality-control chain under an IATF 16949 system.
Key Takeaways¶
- In-house, end-to-end — plate manufacturing, assembly, testing and packaging all run on the same 18 automated lines; nothing is outsourced and re-badged.
- Five laboratories, not one — chemical, physical, electrical, life-cycle and environmental labs each verify a different dimension of the battery.
- Five-stage QC, not a final spot-check — quality is controlled at incoming inspection, in-process, finished-product, pre-shipment and traceability stages.
- Per-batch documentation — COA, MSDS and inspection reports ship with every order, so a buyer can verify a batch rather than trust a claim.
- Traceability is the honest part — batch-level tracking from raw material to container is what makes recalls (if ever needed) possible and import compliance straightforward.
The Factory¶
DINWEYS is the truck and heavy-duty starting-battery brand of Chengguang Power Tech Co., Ltd., a battery manufacturer founded in 2002 and based in Jinzhou City, Shijiazhuang, Hebei Province, China.
| Fact | Detail |
|---|---|
| Founded | 2002 |
| Facility | 200,000 m² |
| Production | 18 automated assembly lines |
| Export | 70+ countries |
| Focus | Truck / heavy-duty / commercial-vehicle starting batteries |
The Manufacturing Chain¶
Chengguang Power Tech controls the entire production chain in-house. A DINWEYS battery is not assembled from outsourced parts — it is produced end-to-end:
- Grid casting — lead alloy grids form each plate's structure.
- Paste mixing — lead oxide paste is mixed to a controlled recipe.
- Pasting — paste is applied to the grids to form the plates.
- Curing — plates are dried and hardened under controlled conditions.
- Formation — the initial charge converts the plates into active material.
- Assembly — plates are welded into elements and stacked into cells.
- Testing — CCA, capacity, leak and dimensional checks before packing.
The Five On-Site Laboratories¶
Every batch is verified across five laboratories before release:
| Laboratory | What it verifies |
|---|---|
| Chemical Lab | Raw material analysis, paste composition, electrolyte purity |
| Physical Testing Lab | Plate strength, separator porosity, container integrity |
| Electrical Testing Lab | CCA, reserve capacity, charge acceptance, high-rate discharge |
| Life Cycle Testing | JIS/DIN/BCI cycle life, corrosion resistance, overcharge endurance |
| Environmental Chamber | Temperature cycling (−40°C to +80°C), humidity, vibration |
The Five-Stage Quality-Control Chain¶
Quality is not a final spot-check — it runs the length of the chain:
- Incoming material inspection — lead ingots, sulfuric acid, polypropylene and separator materials are tested before production.
- In-process QC — all 18 lines are monitored in real time for paste density, plate weight, welding integrity and electrolyte fill levels.
- Finished product testing — every batch undergoes CCA, reserve capacity, charge acceptance, leak test and visual inspection.
- Pre-shipment audit — random sampling per AQL standards; packaging, labelling and documentation verified.
- Traceability — batch-level tracking from raw material to container, with full documentation for import compliance.
Documentation That Ships With Every Order¶
| Document | What it proves |
|---|---|
| COA (Certificate of Analysis) | Per-batch measured CCA, capacity, RC |
| MSDS (Safety Data Sheet) | Chemical and handling safety |
| Inspection reports | CCA, RC, visual, leak test results |
| Certificate of Origin | Form E / Form F for preferential tariffs |
Third-party lab testing (SGS, TÜV, BV) is available at the buyer's request.
Certifications
Chengguang Power Tech holds IATF 16949, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, OHSAS 18001 and CE Marking. Certificate numbers and validity are provided with quotations.
Why This Matters to a Buyer¶
A truck battery is a safety and uptime component, not a commodity. The manufacturing and QC evidence above is what separates a factory you can hold to a specification from a trading company you have to take on faith. For how to verify a factory yourself before committing, see how to audit a battery factory. For the full order process, see truck battery OEM procurement process.
Related¶
- How to audit a battery factory
- Truck battery OEM procurement process
- OEM & private-label programs
- How to read a datasheet