Coin Battery Module Case Support for Thin PCB Shock Resistance
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Solution Overview
Problem
The existing battery module mounting techniques on multilayer circuit boards face issues with mechanical strength degradation, leading to potential damage of electrode plates and battery dropping, which compromises the energizing function.
Innovation Solution
A battery module design featuring a case body with a flat plate portion and a projecting base portion, where the battery is secured on the base portion, allowing the case body to support the battery's weight and reduce stress on the circuit board, thereby enhancing shock resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the circuit board thickness is reduced and area is saved to achieve height reduction and improve case accommodation properties, then the mechanical strength of the circuit board is degraded, but the battery module loses energizing function due to damage of electrode plates or dropping of the battery
Solution Approach 1:
The patent introduces a case body as an intermediary component between the battery and the circuit board. The case body includes a bottom wall that supports the battery from below, transferring the battery's weight to the case body rather than directly to the thin circuit board. This mediator structure allows the circuit board to be made thinner while still providing adequate mechanical support for the battery assembly.
2Device complexity
If electrode plates and circuit board are used to support the battery weight directly, then mounting is simple, but shock resistance is poor and battery damage occurs
Solution Approach 1:
The case body serves as a mediator that absorbs and distributes shock loads. When external shocks occur, the case body's rigid structure protects the battery and electrode plates from direct impact forces, preventing damage while maintaining a relatively simple overall mounting structure.
Solution Approach 2:
The case body provides beforehand cushioning by creating a protective enclosure around the battery. The bottom wall and side walls of the case body are designed to withstand and distribute mechanical stresses before they can reach the battery, ensuring shock resistance and preventing battery dropping or damage during operation.
Data Source
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AI summary
A battery module according to the present invention includes: a case body including a flat plate portion and a base portion projecting from the flat plate portion; a circuit board including a through-hole formed in a thickness direction and secured to the case body, the base portion being inserted into the through-hole; and a battery secured to and placed on the base portion, in which the battery is a flat battery with a coin shape or a button shape, and electrode plates connected to each of the positive and negative poles of the battery are connected to the circuit board to supply a power source to electronic components disposed on the circuit board.