Battery Module Fixing Member for Vibration Isolation
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Solution Overview
Problem
Existing battery modules with pouch-type secondary batteries face challenges in maintaining stability and protecting electrode leads from external vibrations, leading to mechanical impacts and electrical connection issues.
Innovation Solution
A battery module design featuring a fixing member, such as a stacking frame or spacing block, adhered to the terrace portion of pouch-type secondary batteries using a thermally-conductive adhesive or double-sided tape, which stabilizes the battery stack and protects the electrode leads by isolating them from external vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate coupling member such as a cartridge is used to protect the secondary battery stack against external impacts and allow easy stacking, then the mechanical protection and stacking ease are improved, but the device complexity and volume increase
Solution Approach 1:
The fixing member integrates multiple functions: it acts as a coupling element to stack batteries, provides mechanical protection against impacts, and serves as a fixing structure to prevent movements. By combining these functions into a single component rather than using separate coupling members and protection structures, the patent reduces device complexity while maintaining reliability
Solution Approach 2:
The fixing member is designed to perform multiple roles simultaneously: structural support for stacking, mechanical protection for the battery stack, and fixation for preventing movements. This multi-functional design eliminates the need for separate specialized components, thereby reducing overall structure complexity
2Strength
If surface pressure is applied to a large area portion of the body to fix secondary batteries, then the fixation strength is improved, but the electrode lead protection against external vibrations deteriorates
Solution Approach 1:
The fixing member is designed with specific structural segments including a fixing portion that contacts the battery body and a protection portion that specifically shields the electrode lead. This segmentation allows different regions to perform different functions: one region provides fixation strength while another region protects the electrode lead from vibrations
Solution Approach 2:
The fixing member features localized structural characteristics: the fixing portion has properties optimized for strong adhesion to the battery body, while the protection portion has properties optimized for vibration damping and electrode lead shielding. This local differentiation of properties enables simultaneous achievement of fixation strength and electrode lead protection
3Ease of manufacture
If the battery module structure is simplified and volume reduced, then the manufacturability and weight are improved, but the thermal conductivity and protection capability may deteriorate
Solution Approach 1:
The fixing member is constructed from composite materials that combine structural integrity with thermal conductivity. This allows the simplified single-component structure to maintain both ease of manufacture and adequate thermal management capability, as the composite material inherently provides both mechanical and thermal properties
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 solution simplifies the battery module structure, reduces volume and weight, enhances manufacturability, and improves thermal conductivity, effectively preventing physical and chemical deformation, thus maintaining optimal operation and extending the battery's lifespan.
Implementation Method 1
A battery module design featuring a fixing member, such as a stacking frame or spacing block, adhered to the terrace portion of pouch-type secondary batteries using a thermally-conductive adhesive or double-sided tape
Data Source
AI summary
Disclosed is a battery module, which may stably maintain a secondary battery stack and have less damage to an electrode lead due to external vibration, and a battery pack including the battery module. The battery module comprises a plurality of pouch-type secondary batteries respectively configured to accommodate an electrode assembly in a pouch thereof so that an electrode lead connected to an electrode tab of the electrode assembly is drawn through a terrace portion of the pouch, and a fixing member interposed at least partially between the secondary batteries and adhered and fixed to the terrace portion to maintain the secondary batteries in a stacked state.