Molded Battery Pack Circuit Buffering Against Drop Cracking
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Solution Overview
Problem
Existing battery pack protection circuit modules are prone to damage during drop tests due to the lack of effective impact absorption mechanisms, leading to potential cracking of the molding part.
Innovation Solution
Incorporating a molding part with a plurality of buffering members on its body, specifically designed to absorb impacts by being accommodated in accommodation grooves and protruding outward, thereby protecting the protection circuit module from damage during drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a molding protection circuit module is used to integrate components, then device complexity is reduced and manufacturing is simplified, but the molding part becomes vulnerable to cracking during drop tests due to lack of impact absorption
Solution Approach 1:
The patent applies beforehand cushioning by providing buffering members on the molding part before impact occurs. These buffering members are strategically positioned to absorb impact forces during drop tests, preventing the molding part from cracking while maintaining the integrated structure's simplicity.
Solution Approach 2:
The patent uses composite materials by combining the molding part (protection circuit module housing) with buffering members made of different material properties. This composite structure allows the molding part to maintain its protective function while the buffering members provide impact absorption, resolving the contradiction between structural simplicity and impact resistance.
2Quantity of substance
If the available area of battery packs is expanded by increasing capacity, then energy storage is improved, but the protection circuit module becomes more susceptible to damage during drops due to larger size and area
Solution Approach 1:
The patent applies segmentation by dividing the protection circuit module into the molding part and separate buffering members. This segmentation allows the buffering members to be specifically designed for impact absorption, protecting the larger module structure that results from increased battery capacity.
Solution Approach 2:
The buffering members act as intermediaries between the molding part and external impact forces. They absorb and distribute impact energy, protecting the protection circuit module from damage during drop tests, thereby enabling larger battery packs to maintain reliability despite increased susceptibility to impact damage.
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
The buffering members effectively absorb and distribute the impact of a drop, reducing the likelihood of damage to the protection circuit module and its components, thereby enhancing the durability and reliability of the battery pack.
Implementation Method 1
a plurality of buffering members provided on side surfaces of the body that are opposite to each other in a widthwise direction of the body
Data Source
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AI summary
A battery pack includes a battery cell having one or more electrode tabs, a case accommodating the battery cell, and a protection circuit module including a substrate. One or more substrate tabs on the substrate are connected to the one or more electrode tabs. A molding part is provided on the substrate, and the molding part includes a body, with a plurality of buffering members being provided on the body.