Robot Battery Hot-Swap Locking for Continuous Operation

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Solution Overview

Problem

Mobile robots face inefficiencies in battery replacement due to the time required for charging, which renders them unusable during the charging process.

Innovation Solution

A robot equipped with a withdrawable main battery, a sub-battery, and a locking mechanism, controlled by a controller, allows for efficient battery swapping by aligning with charging stations and switching power sources, enabling continuous operation through a hot swap process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the battery is charged by an external charging station, then the battery state of charge is restored, but a large amount of time is required and the robot cannot be used during charging

Engineering Contradiction:
Improvebattery availabilityVSAvoidcharging time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The battery system is segmented into a main battery and a sub-battery. The main battery can be quickly swapped out when depleted, while the sub-battery provides immediate power continuity. This segmentation eliminates the need for lengthy charging cycles by enabling rapid battery replacement.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A sub-battery is pre-installed in the robot as a backup power source. When the main battery is depleted, the sub-battery immediately takes over to provide power, allowing the robot to remain operational during the battery swap process without interruption.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If a locking part is added to prevent unauthorized battery removal, then battery security is improved, but the structure becomes more complex

Engineering Contradiction:
Improvebattery securityVSAvoidlocking mechanism structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The locking part automatically engages when the robot is not docked with a charging station, and automatically disengages when docked. This self-service locking mechanism eliminates the need for complex manual locking systems while maintaining battery security through automated controller management.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The locking mechanism transitions between locked and unlocked states dynamically based on the robot's docking status. The locking part moves between a locked position (preventing removal) and an unlocked position (allowing removal), with state changes automatically controlled by the controller according to docking detection.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS20250381684A1Robot, battery swap system, and method of controlling robot
Publication Date: 2025.12.18 HYUNDAI MOTOR CO LTD
  • US20250381684A1 patent drawing
  • US20250381684A1 patent drawing
  • US20250381684A1 patent drawing

AI summary

A robot can be configured to receive electric power from a main battery provided replaceably. The robot can include a body having an accommodation space in which the main battery is accommodated in a withdrawable manner, a movement part configured to move the body, and a locking part configured to move relative to the body between a withdrawal-allowed state in which the main battery accommodated in the accommodation space is allowed to be withdrawn from the accommodation space and a withdrawal-inhibited state in which the main battery accommodated in the accommodation space is inhibited from being withdrawn from the accommodation space.