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  Battery Fuse Terminal

Background

Battery Fuse Terminal (BFT) is a product family, aiming at a complete protection of the wiring harness connected to the battery. The BFT is mounted directly on the battery pole, reducing the amount of parts and using stamped pre-fuses instead of traditional fuse links. As the BFT is connected directly to the battery, there is no need for a cable between the battery (+)-pole and the BFT which would have a relatively high cross section of the cable, due to the high current. Without a YAZAKI BFT, if there is a short circuit and a fuse is not installed, current will flow from the battery until the wire is burnt off and fire will break out in the worst case.

Market Needs

Existing products could not meet the increased requirements. The following market needs occurred:

  • Safety during collision (vehicle fire prevention)
  • Minimize size because of limited engine room space of Power Distribution Box (PDB)
  • Standardization of power supply circuits
  • Countermeasure against alternator noise

 

Further expansion of the products is problematic due to:

  1. A large number of components and high cost
  2. Problematic W/H assembly
  3. It is a big and heavy product

 

A new product should be downsized, lightweight and space saving (50% reduction). Target attributes are good workability, versatility, serviceability, good performance and low price.

Solutions

By placing the high current fuse links for power supply not in the PDB but on the battery, the customers’ requirements will be met in the best way.

 

 

 

 

Benefits

The following are the features of the BFT developed by YAZAKI compared with the traditional high current fuse boxes.

  1. The BFTs are designed with Cooling Ribs to reduce temperature increase.
  2. The use of Bolts and Integrated Circuits with Busbars reduce the number of components, packaging size, weight and cost and are moulded into the plastic material.
  3. Compatible stamping tool for fuse element area (standardize components among vehicle families)
  4. The output is designed for easy connection to W/H with either connector or screw.
  5. Secure visibility is obtained by assembling transparent cover for the fuse circuits.
Features of YAZAKI’s BFT

Other reasons to introduce the BFT:

  1. Standardize components within vehicle family and engine room results in cost reduction of the W/H in total.
  2. Limited space in engine compartment.
  3. Short circuit on W/H which causes fire is avoided by the BFT as it is directly connected to the battery pole.
  4. Countermeasure against temperature rise of PDB due to increased number of circuits.
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