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How a Nantong Mould Shop Quietly Supplies Battery-Pack Foam Pads to Top EV Programs

2026,09,07
Rugao, Jiangsu — August 31, 2026 — Behind some of the best-selling electric vehicles on Chinese roads sits a small mould shop in Rugao that few consumers have ever heard of. Nantong Bainuo Mould Co., Ltd. has, over the past three years, become a quiet but consistent supplier of EPP foam pads used inside high-voltage battery packs for thermal-runaway protection.

The pads must hit narrow performance windows — density between 50 and 70 g/L, thickness from 18 to 30 mm, compression set below 12 percent at 70 °C. Bainuo's EPP moulds, machined in-house on large-format CNC equipment and run through full steam-channel simulation, deliver those numbers consistently across batches.

Battery-pack foam is one of those components that does not get attention until something goes wrong. If the pad does not behave predictably under thermal stress, the pack's whole passive-cooling strategy falls apart. That is why EV integrators tend to lock in mould suppliers very early — and why the relationship between Bainuo and several Chinese OEM battery teams has stretched across multiple vehicle generations.

Beyond batteries, Bainuo's EPP moulds are used for seat cores, bumper energy absorbers, tool kits, interior protectors, and a growing list of cold-chain packaging inserts. The company also supplies moulds for the home-appliance, integrated-stove and fresh-produce packaging industries.

Read the full case study: https://www.bainuomoulds.com/news/how-a-nantong-mould-shop-quietly-supplies-battery-pack-foam-pads-to-top-ev-programs-387322.html

Company: Nantong Bainuo Mould Co., Ltd. Website: https://www.bainuomoulds.com/ Address: No. 39, Group 16, Xia Zhuang Residential Area, Chengnan Subdistrict, Rugao City, Nantong, Jiangsu, China Contact page: https://www.bainuomoulds.com/contact-us.html

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