Battery Cell Fixation via Form-Fit Engagement
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Solution Overview
Problem
Motor vehicle batteries face issues with battery cells moving relative to the housing due to shocks and vibrations, leading to frictional movements and potential breakage of soldered joints, and existing solutions like potting compounds increase weight and manufacturing costs.
Innovation Solution
A battery design featuring a holding element with a recess and engagement element that forms a form-fit connection with the battery cell, using lightweight and inexpensive materials, and a magazine system to securely hold multiple cells, preventing relative movement and ensuring a reliable electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tensile materials are used for mechanical fixation of battery cells, then firm hold of battery cells is achieved, but manufacturing cost increases
Solution Approach 1:
The patent replaces the traditional mechanical fixation system using tensile materials with a form-fit connection system based on geometric shapes. The engagement element with projection and counter-projection creates a mechanical interlock that prevents displacement without requiring high-tensile materials, thereby reducing manufacturing costs while maintaining reliable cell fixation.
2Reliability
If potting compound is used to encapsulate battery cells, then battery cells are fixed in housing, but battery weight increases
Solution Approach 1:
The patent extracts the fixation function from the potting compound and implements it through a dedicated holding element with form-fit connection. This separates the mechanical fixation task from the encapsulation material, allowing the use of lightweight materials for both the holding element and potting compound, thereby reducing overall battery weight while maintaining cell fixation reliability.
3Reliability
If electrical conductors are pressed against battery cells by mechanical means, then electrical connection is secured, but relative movement causes friction and breakage
Solution Approach 1:
The patent merges the functions of battery cell fixation and electrical conductor securing into a single holding element. The engagement element not only prevents cell displacement through form-fit connection but also anchors the electrical conductors simultaneously. This integrated approach ensures electrical connection reliability while eliminating relative movement between cells and conductors, preventing friction and breakage.
Data Source
Figure 1
Figure 2~3
AI summary
The aim of the invention is to provide a battery that is simple and inexpensive to produce. The battery according to the invention comprises a battery cell (22) as a first component and a retaining element (14) as a second component. The battery cell (22) is retained in a housing of the battery by means of the retaining element. One of the two components, either the battery cell (22) or the retaining element (14), has a recess (42) in which an engagement element of the other component (14) engages so that a movement of the battery cell relative to the retaining element is blocked in at least one direction (40). The engagement element ensures a form-fit connection between the battery cell (22) and the retaining element (14).