Battery Pack Adhesive Sheet Bubble Prevention
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Solution Overview
Problem
Existing battery packs face challenges in preventing bubble formation and electrostatic charge generation during assembly, which can affect the efficiency and reliability of the battery pack's electrical connections and protective circuit modules.
Innovation Solution
The battery pack design incorporates an adhesive sheet with a bubble prevention part featuring adhesive layers and air discharge paths, and a protective cover to prevent bubble formation and electrostatic charge, ensuring secure attachment and protection of the battery cells and protective circuit module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an adhesive sheet is applied to the case during assembly, then the battery cells and protective circuit module are securely attached, but bubbles form between the adhesive sheet and case surface reducing assembly quality
Solution Approach 1:
The adhesive sheet has air discharge paths pre-formed during manufacturing, allowing bubbles to escape automatically during the adhesive bonding process before the adhesive fully cures, preventing bubble entrapment and ensuring complete surface contact
2Ease of manufacture
If the protective circuit module is exposed during assembly, then electrical connections can be established, but electrostatic charge can damage the sensitive circuit components
Solution Approach 1:
The protective cover is positioned over the protective circuit module before adhesive sheet application, creating an electrostatic shield that prevents harmful electrostatic charges from reaching the sensitive circuit components while still allowing electrical connections to be established through designated contact points
3Object-affected harmful factors
If a protective cover is added over the protective circuit module, then electrostatic damage is prevented, but the device structure becomes more complex
Solution Approach 1:
The protective cover is integrated with the adhesive sheet assembly process, combining the protective function with the existing structural components rather than adding a completely separate element, thereby minimizing overall device complexity while maintaining electrostatic protection
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively reduces bubble formation and electrostatic charge generation, enhancing the assembly efficiency and reliability of the battery pack by ensuring proper electrical connections and protecting the circuit modules from damage.
Implementation Method 1
a bubble prevention part on the base sheet... The bubble prevention part may include adhesive layers on one surface of the base sheet; and air discharge paths between the adhesive layers
Implementation Method 2
a protective cover interposed between the protective circuit module and the adhesive sheet
Data Source
AI summary
A battery pack including a plurality of battery cells; a protective circuit module electrically connected to the plurality of battery cells, the protective circuit module being for establishing an electrical connection with an external electronic device; a case accommodating the plurality of battery cells and the protective circuit module, the case including a first case and a second case coupled to the first case; an adhesive sheet attached to at least a portion of an outer surface of the case, the adhesive sheet including a base sheet and a bubble prevention part on the base sheet; and a protective cover interposed between the protective circuit module and the adhesive sheet.