Embedded Signal Patterns in Battery Protective Circuit Boards
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Solution Overview
Problem
Conventional protective circuit boards for battery packs are susceptible to malfunctions due to external electromagnetic waves and static electricity, which affect the electronic components, and existing shielding methods increase manufacturing costs and weight.
Innovation Solution
The protective circuit board incorporates main signal patterns inside an insulation layer, with optional second signal patterns and dummy patterns positioned within the layer to absorb and remove electromagnetic interference, preventing noise from reaching the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If signal patterns are formed on the surface of the insulation layer, then ease of manufacture is improved, but reliability deteriorates due to susceptibility to electromagnetic waves and static electricity
Solution Approach 1:
The signal patterns are embedded within the insulation layer structure, with the conductive pattern nested inside the insulating material. This nesting approach protects the signal patterns from external electromagnetic interference while maintaining manufacturing feasibility through integrated layer formation processes.
Solution Approach 2:
The insulation layer acts as an intermediary barrier between the signal patterns and external electromagnetic waves or static electricity. By positioning the signal patterns within the insulation layer rather than on its surface, the insulating material mediates and blocks harmful external factors from directly affecting the conductive patterns.
2Reliability
If shielding treatment is applied to the case or additional protective layers are added, then reliability is improved, but weight increases and manufacturing cost increases
Solution Approach 1:
The protective function is merged with the existing insulation layer structure. Instead of adding separate shielding layers or protective cases, the insulation layer itself is configured to provide both electrical insulation and electromagnetic shielding, combining multiple functions into a single integrated component.
Solution Approach 2:
The insulation layer serves multiple functions simultaneously: it provides electrical insulation between conductive elements and acts as an electromagnetic shield protecting signal patterns from external interference. This multi-functionality eliminates the need for additional dedicated shielding components, reducing overall weight and complexity.
Data Source
AI summary
A protective circuit board for a battery pack for controlling charge and discharge states of the battery pack includes an insulation layer and a first signal pattern disposed inside the insulation layer. The circuit can further include a second signal pattern disposed inside the insulation layer. The circuit can include a first dummy pattern spaced from a first side of the first signal pattern and a second dummy pattern spaced from a second side of the first signal pattern.