We are Taizhou Liuhuan Machinery Co., Ltd., a manufacturer of connection joints for battery thermal management systems in new energy vehicles. This joint is a key component of the coolant loop inside the battery pack. We use high-performance plastics such as PPA and PA66 GF30, or lightweight aluminum. Our design features multiple sealing layers, with its main strength being reliable sealing. It resists chemical damage from refrigerants and coolants while maintaining low flow resistance.
Built for the EV Challenge: Reliable in Harsh Conditions
The BMS connector ensures efficient, leak-free coolant flow between battery cells. Maintaining proper battery temperature is critical for fast-charging safety and long battery life. In EVs and hybrids, this joint connects the cooling plate to the main pipe, and it must withstand temperatures from -40°C to over 120°C, coolant pressure changes, and vehicle vibrations. Our product is engineered to perform reliably under these tough conditions.
Material and Seal: Designed for Durability
We select materials according to BMS connector requirements and pressure conditions. The plastic materials meet UL94 V-0 flame rating, and aluminum parts are treated for corrosion resistance. The seal typically incorporates multiple features, including an O-ring static seal and a tapered or flat seal. Some designs include a quick-connect lock. All materials undergo long-term compatibility testing to ensure they work well with glycol-based or new direct-coolant systems without swelling or aging.
Custom Options: A Fit for Your System
We offer simple T-joints as well as complex multi-port modular joints. Flow path diameter, connection angle, and thread standard can all be customized to your needs. We can also add ports for temperature sensors. Our modular design simplifies the pipe layout inside your battery pack, reducing the number of assembly parts and improving production consistency.
Key Specifications
| Parameter | Value / Capability |
| Material | PPA, PA66 GF30, or lightweight aluminum alloy |
| Seal Type | Multi-layer (O-ring, tapered, flat) |
| Temperature Range | -40°C to 120°C+ |
| Flame Rating | UL94 V-0 (for plastic materials) |
| Customization | Flow path size, angle, thread standard, sensor ports |
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