Battery Cell Group Assembly Using Insulating Packing Straps
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Solution Overview
Problem
Existing battery assembly methods face challenges in improving assembly efficiency while ensuring safety performance, particularly due to the risk of sharp burrs from hot-melt welding, which can puncture separators and cause insulation failures or short circuits.
Innovation Solution
The use of an insulating packing strap fixed to end plates rather than between end parts, eliminating the need for hot-melt welding and preventing burr formation, thereby simplifying assembly and enhancing safety by avoiding direct contact with battery cell components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hot-melt welding is used to fix the two end parts of the insulating packing strap, then the insulating packing strap can be assembled, but sharp burrs are easily produced in the fixing region which can puncture the separator and cause insulation failure or short circuit
Solution Approach 1:
The patent extracts and removes the harmful hot-melt welding process from the assembly method. Instead of using hot-melt welding to fix the insulating packing strap, the invention uses alternative fixation methods (such as mechanical fastening or adhesive bonding) that do not produce sharp burrs, thereby eliminating the source of the harmful factor while maintaining the structural integrity and insulating function of the packing strap
Solution Approach 2:
The patent introduces an intermediary fixation method between the insulating packing strap and the battery components. Instead of directly hot-melt welding the strap to the end parts, an intermediate fixation mechanism is used that achieves the same structural connection without generating harmful burrs, thus protecting the separator and maintaining insulation performance
2Strength
If the insulating packing strap is fixed by hot-melt welding between end parts, then connection is achieved, but it complicates the assembly process and reduces assembly efficiency
Solution Approach 1:
The patent replaces the thermal field-based hot-melt welding process with a mechanical or chemical fixation system. This substitution eliminates the need for heating equipment and complex welding parameters, simplifies the assembly process, and significantly improves production efficiency while maintaining sufficient fixing strength through mechanical interlocking or adhesive bonding
Solution Approach 2:
The patent changes the fixation parameters from high-temperature thermal processing to room-temperature mechanical or chemical bonding. This parameter change eliminates the need for specialized welding equipment and complex process control, enabling faster assembly operations and improving overall productivity without compromising the strength of the insulating packing strap fixation
Data Source
AI summary
Embodiments of the present application disclose a battery and a power consumption device. The battery may include: a battery cell group, the battery cell group including a plurality of battery cells arranged along a first direction; two end plates respectively abutting against two end faces of the battery cell group disposed opposite to each other the two end faces being perpendicular to the first direction; and an insulating packing strap, the insulating packing strap including two end parts and a main body part connecting the two end parts, the two end parts being respectively fixed with the two end plates, and the main body part extending along the first direction, so that the insulating packing strap fixes the battery cell group.