E-Bike Frame Battery Mounting with Active Anti-Theft Locking

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Solution Overview

Problem

Existing bicycle frame battery mounting systems face challenges in securing the battery unit reliably, ensuring a secure electrical connection, and providing anti-theft protection, often resulting in sophisticated and expensive solutions.

Innovation Solution

A bicycle frame with a tube section featuring battery guiding and locking means, including an electrically driven locking element that translates and/or rotates the battery unit between temporary and final mounting positions, ensuring secure mounting and electrical connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sophisticated mounting mechanisms are used to secure the battery unit reliably and provide anti-theft protection, then the reliability and security are improved, but the device complexity and manufacturing cost increase

Engineering Contradiction:
Improvebattery mounting reliabilityVSAvoidmounting mechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The mounting mechanism is divided into separate functional modules: guiding means for positional control and locking means for security. This segmentation allows each module to perform its specific function efficiently without requiring a complex integrated system, thereby reducing overall device complexity while maintaining reliability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent replaces complex mechanical locking mechanisms with an electrically driven locking element that can be controlled electronically. This substitution reduces mechanical complexity and enables remote monitoring and control of the battery mounting status, improving reliability without increasing device complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If sophisticated mounting mechanisms are used to ensure secure electrical connection and anti-theft protection, then the security and connection reliability are improved, but the manufacturing cost increases

Engineering Contradiction:
Improveelectrical connection securityVSAvoidmanufacturing cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The guiding means serves multiple functions: it guides the battery unit during installation, provides positional control, and works in conjunction with the locking means to ensure secure mounting. This multi-functionality reduces the need for separate components, thereby lowering manufacturing costs while maintaining connection security and reliability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The electrically driven locking element replaces complex mechanical locking and electrical connection mechanisms with a single integrated electrical actuation system. This reduces the number of parts that need to be manufactured and assembled, lowering manufacturing costs while ensuring secure electrical connection and anti-theft protection.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If manual locking mechanisms are used, then the device complexity is reduced, but the ease of operation and theft protection capability deteriorate

Engineering Contradiction:
Improvelocking mechanism simplicityVSAvoidbattery mounting ease
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The patent replaces manual mechanical locking operations with an electrically driven locking element that can be actuated through electrical signals. This improves ease of operation by eliminating manual manipulation of locking components while maintaining simplicity in the overall device architecture. The electrical actuation enables remote or automated locking, enhancing theft protection without significantly increasing device complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

4Ease of operation

If the battery unit is movable between positions for easy installation, then the ease of operation is improved, but the security and anti-theft protection deteriorate

Engineering Contradiction:
Improvebattery installation easeVSAvoidbattery security
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent implements a dynamic mounting system where the battery unit can be freely moved along the guiding means during installation, but the electrically driven locking element can be activated to securely fix the battery in its final position. This dynamic behavior allows the system to adapt to different operational requirements: movable during installation for ease of operation, and fixed during use for security and anti-theft protection.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP3901024B1Bicycle frame, battery unit and method for mounting the same
Publication Date: 2026.01.07 ACCELL GROUP
  • EP3901024B1 patent drawingFigure 1~2
  • EP3901024B1 patent drawingFigure 3~4
  • EP3901024B1 patent drawingFigure 5~6

AI summary

The present invention relates to a bicycle frame (1), comprising a tube section (2) having a receiving space (4) for receiving at least one battery unit (40), suitable as a source of energy for an electromotive bicycle drive (50); battery guiding means (10), for guiding the battery unit (40) along a first axis A1 between an insertion position Pi and a temporary mounting position Pt in the receiving space (4); battery locking means (20), for locking and/or unlocking the battery unit (40) in the receiving space (4) in a final mounting position Pf; wherein the battery locking means (20) is an active locking means, comprising at least one electrically or similar driven locking element (22), arranged for, optionally translationally and/or rotationally, moving the battery unit (40) between its temporary mounting position Pt and its final mounting position Pf along a second axis A2. Also the invention relates to a respective battery unit and a method for mounting and/or detaching a battery unit (40) to a bicycle frame (1).