Vehicle Battery Harness Holder for Voltage Detection Accuracy

Solution Overview

Problem

High-voltage battery harnesses in electric vehicles suffer from errors in battery voltage detection due to their analog circuitry, which are influenced by wire type, diameter, temperature, and mechanical connections, leading to reduced accuracy and increased risk of over-charging/over-discharging, necessitating thicker, shorter harnesses with fewer connections to improve energy efficiency.

Innovation Solution

A vehicle battery unit design featuring a harness holder that positions harness connectors perpendicular to the battery arrangement, minimizing harness length and connections while maintaining mechanical strength and weight efficiency, and incorporating offset lead portions to prevent wrong connections and electromagnetic noise interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the VHB harness is made thinner and longer to meet vehicle weight and interior space requirements, then vehicle weight and interior space are optimized, but battery voltage detection accuracy deteriorates due to increased error from analog circuitry

Engineering Contradiction:

Improvevehicle weightVSAvoidbattery voltage detection accuracy

Core Design Contradiction:

Weight of moving objectVSMeasurement precision

Solution Approach 1:

The patent replaces the mechanical/electrical analog circuitry system with a digital communication system. Instead of using analog voltage signals through physical wire harnesses, the invention uses digital communication protocols to transmit battery voltage information, eliminating the errors inherent in analog circuitry while allowing for optimized wire gauge and length.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental parameter of signal transmission from analog voltage to digital communication. This parameter change allows the system to maintain high detection accuracy regardless of wire characteristics, as digital signals are immune to the degradation that affects analog signals over long distances or through temperature variations.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the VHB harness is made thicker and shorter to improve battery voltage detection accuracy, then measurement precision improves, but vehicle weight increases and interior space is reduced

Engineering Contradiction:

Improvebattery voltage detection accuracyVSAvoidvehicle weight

Core Design Contradiction:

Measurement precisionVSWeight of moving object

Solution Approach 1:

The patent replaces the mechanical/electrical analog circuitry system with a digital communication system. Instead of using analog voltage signals through physical wire harnesses, the invention uses digital communication protocols to transmit battery voltage information, eliminating the errors inherent in analog circuitry while allowing for optimized wire gauge and length.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If the VHB harness has more mechanical connections to accommodate complex routing, then ease of installation improves, but measurement precision deteriorates due to increased error from additional harness joints

Engineering Contradiction:

Improveease of installationVSAvoidbattery voltage detection accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent replaces the mechanical/electrical analog circuitry system with a digital communication system. Instead of using analog voltage signals through physical wire harnesses, the invention uses digital communication protocols to transmit battery voltage information, eliminating the errors inherent in analog circuitry while allowing for optimized wire gauge and length.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10158113B2Vehicle battery unit and harness holder

Publication Date: 2018.12.18 HONDA MOTOR CO LTD

AI summary

A vehicle battery unit includes at least one first battery, at least one second battery, and a harness. The at least one first battery has a first battery connector. The at least one second battery has a second battery connector. A harness has harness connectors connected to the first battery connector and second battery connector. The harness holds the harness in such a manner that connecting portions of the harness connectors are directed toward a direction substantially perpendicular to a battery arranging direction in which the at least one first battery and the at least one second battery are arranged.