Battery Pack Label with Release Sheet for PCM Adhesion
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Solution Overview
Problem
Battery packs in portable electronic devices face issues with noise generation and electrostatic discharge when the label adhered to the frame or battery cell is distorted, leading to the label being released.
Innovation Solution
A battery pack design featuring a label with release sheets attached to specific regions, ensuring the label remains adhered to the battery cell and protective circuit module (PCM) during distortion, and preventing electrostatic discharge by covering the PCM with the release sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hard type label is used to fix and protect the battery cell and PCM in the frame, then the label provides structural protection and fixation, but the label may be released from the battery cell or frame due to distortion applied to the battery pack, generating noises
Solution Approach 1:
The label is divided into multiple segments: a base label adhered to the frame, and additional labels adhered to specific components (battery cell, PCM). This segmentation allows each label portion to move independently with its attached component, preventing stress concentration and adhesion failure that would occur with a single continuous label.
Solution Approach 2:
Different regions of the label system have different adhesion properties. The base label on the frame provides overall structural support, while component-specific labels provide localized protection and electrical isolation. This local differentiation optimizes the function of each label region while maintaining overall system integrity under distortion.
2Length of moving object
If the battery pack is made thinner to meet portable device requirements, then the device becomes lighter and more compact, but the battery pack becomes more flexible and susceptible to bending and transformation
Solution Approach 1:
The label system is designed to be dynamic rather than rigid. Labels are adhered to components that can move relative to the frame, allowing the label system to adapt to bending and transformation of the thin battery pack structure without failing adhesion or generating noise.
Solution Approach 2:
The solution moves from a two-dimensional planar label system to a three-dimensional multi-layer label system. Labels are applied on multiple surfaces (frame, battery cell, PCM) at different spatial positions, creating a volumetric structure that maintains stability even when the overall pack thickness is reduced.
3Object-affected harmful factors
If additional ESD protection components are added to protect the PCM, then ESD protection is improved, but the battery pack thickness and complexity increase
Solution Approach 1:
The label material serves multiple functions simultaneously: it provides mechanical adhesion to secure components, electrical isolation to prevent short circuits, and ESD protection to safeguard the PCM. This multi-functionality eliminates the need for separate ESD protection components, maintaining thin profile and structural simplicity.
Solution Approach 2:
The label system provides its own ESD protection function without requiring additional dedicated components. The conductive or dissipative properties of the label material itself create an ESD protection path, allowing the structure to protect itself from electrostatic discharge.
Data Source
AI summary
Provided is a battery pack, which can be prevented from being released from a label adhered to a frame or a battery cell due to distortion applied to the battery pack, thereby preventing noises from being generated during movement of an adhered surface of the label. A battery pack is also provided, which may prevent electrostatic discharge (ESD). The battery pack includes a battery cell, a protective circuit module (PCM) electrically connected to the battery cell, a frame accommodating the battery cell and the PCM, and a label adhered to the battery cell, the PCM and the frame while surrounding the same. A release sheet is attached to a region of the label surrounding the PCM.