Battery Protective Circuit Module Case Impact Resistance
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Solution Overview
Problem
Electronic devices face reliability issues due to the lack of effective impact resistance for battery pouches, leading to potential electrolyte leakage and short circuits when subjected to external impacts, as the existing protective circuit module cases do not adequately consider the placement and protection of battery pouches.
Innovation Solution
A protective circuit module case design that includes a housing with a mounting portion for the battery, featuring a battery pouch with exposed conductive terminals, a circuit board with protective circuit elements, and a case with a first and second plate and a lateral plate, where the circuit board is positioned between the plates, and a coupling member is used between the battery pouch and the lateral plate to enhance impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the case is designed only to protect the circuit board, then the circuit board protection is improved, but the battery pouch protection deteriorates leading to potential damage from external impacts
Solution Approach 1:
The case is divided into multiple functional components: a first plate for circuit board protection, a second plate for battery pouch protection, and a lateral plate connecting them. This segmentation allows each component to perform its specific protective function independently, resolving the contradiction between circuit board protection and battery pouch protection.
Solution Approach 2:
The case structure serves multiple protective functions simultaneously: the first plate protects the circuit board, the second plate protects the battery pouch, and the lateral plate provides structural connection and additional protection. This multi-functionality resolves the contradiction by making the case capable of protecting both components effectively.
2Strength
If the case is rigid to protect internal components, then component protection is improved, but the case may move randomly due to external impact causing battery pouch damage
Solution Approach 1:
Different parts of the case have different structural properties optimized for their specific functions: the first plate is designed for circuit board protection, the second plate for battery pouch protection, and the lateral plate for structural connection. This local quality differentiation allows the case to maintain stability while providing targeted protection to each component.
3Ease of manufacture
If the battery pouch is soft and flexible, then ease of manufacturing is improved, but impact resistance deteriorates leading to electrolyte leakage and short circuits
Solution Approach 1:
The second plate is positioned in advance to cover and protect the battery pouch before external impacts occur. This prior protective measure allows the battery pouch to remain soft and flexible for ease of manufacturing while the second plate provides the necessary impact resistance to prevent electrolyte leakage and short circuits.
Data Source
AI summary
An electronic device includes a housing having a mounting portion to which a battery is mountable; and the battery mounted to the mounting portion, wherein the battery includes: a battery pouch comprising at least one conductive terminal exposed to the outside; a circuit board electrically connected to the exposed at least one conductive terminal and having at least one circuit element mounted thereon to electrically protect the battery pouch; a case including a first plate and a lateral plate extended to be bent from the first plate, wherein the circuit board is disposed in a space surrounded by the first plate and the lateral plate, and the first plate protrudes further than the accommodated circuit board in an opposite direction of a lateral wall of the battery pouch.