Movable Bus Bar Module for Battery Terminal Dispersion

Solution Overview

Problem

Conventional connecting plates in electric vehicles face challenges in securely mounting battery monitoring ECU due to contractility, making it difficult to absorb the dispersion of battery terminal sizes, which can lead to damage.

Innovation Solution

A bus bar module with movable bus-bars and voltage detecting terminals, featuring a housing part with retaining mechanisms and cut-away portions, allows for flexible connection and absorption of terminal size variations, preventing ECU damage and ensuring secure mounting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If connecting plates with contractility are used to absorb battery terminal size dispersion, then adaptability to size variations is improved, but the battery monitoring ECU may be damaged due to insecure mounting

Engineering Contradiction:

Improveadaptability to terminal size dispersionVSAvoidECU mounting security

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The connecting plate is divided into a rigid portion and a flexible portion. The rigid portion provides stable mounting for the ECU, while the flexible portion absorbs terminal size variations. This segmentation allows each part to fulfill its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the connecting plate have different mechanical properties. The rigid portion has high stiffness for secure ECU mounting, while the flexible portion has low stiffness for absorbing size dispersion. This local differentiation of mechanical properties resolves the contradiction between stability and adaptability.

Inventive Principle:

Principle #3Local quality

2Reliability

If rigid connecting structures are used to securely mount ECU, then ECU mounting security is improved, but the ability to absorb battery terminal size dispersion is reduced

Engineering Contradiction:

ImproveECU mounting securityVSAvoidadaptability to terminal size dispersion

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The connecting plate is divided into a rigid portion and a flexible portion. The rigid portion provides stable mounting for the ECU, while the flexible portion absorbs terminal size variations. This segmentation allows each part to fulfill its specific function without compromise.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the connecting plate have different mechanical properties. The rigid portion has high stiffness for secure ECU mounting, while the flexible portion has low stiffness for absorbing size dispersion. This local differentiation of mechanical properties resolves the contradiction between stability and adaptability.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3133672B1Bus bar module, battery monitoring module, and battery module

Publication Date: 2019.10.30 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

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AI summary

A bus bar module electrically connects in series a plurality of batteries stacked against each other in a row with alternately opposite polarities. This bus bar module has the plurality of bus-bars, and a housing part. The housing part includes a plurality of housing units for housing each of the plurality of the bus-bars such that the bus bars are movable along three axes. Each of the plurality of the bus-bars connects together electrodes of the two adjacent batteries among the plurality of the batteries, while being provided with two holes for loosely inserting the electrodes. Each of the plurality of housing units has a retaining part for retaining each of the plurality of the bus-bars inside each of the plurality of the housing units.