Battery Module Fixing Member with Reinforcement for Pressure Distribution
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Solution Overview
Problem
High-capacity rechargeable batteries face instability due to external impacts and expansion, leading to potential damage from improperly fixed end plates and fixing members, which can cause increased pressure and damage during charging and discharging cycles.
Innovation Solution
A battery module design featuring end plates with support steps and reinforcement members, along with a fastener system that includes vent holes and strategically sized fixing holes, allows for stable fixation and pressure distribution across the module, using a reinforcement member to diffuse pressure and prevent damage from expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a fixing member is fixed to end plates by a bolt, then the module is held together, but the fixing member may be damaged due to increased force from battery expansion
Solution Approach 1:
The fixing member is divided into two functional parts: a bolt for initial assembly and a reinforcement member with a larger contact area for load distribution. This segmentation allows the bolt to perform its fastening function while the reinforcement member handles the expansion forces, preventing damage to either component.
Solution Approach 2:
The reinforcement member is pre-installed on the end plate before the bolt is tightened. This preliminary action ensures that when the battery expands, the reinforcement member is already in position to distribute the forces, preventing sudden damage to the bolt or fixing member.
2Weight of moving object
If synthetic resin is used for the fixing member to reduce weight, then weight is reduced, but the fixing member may be damaged under external impact or expansion force
Solution Approach 1:
The fixing system uses a composite structure combining synthetic resin (for weight reduction) with metal reinforcement members or bolts (for strength). The synthetic resin fixing member provides lightweight construction while the metal reinforcement member or bolt provides the necessary mechanical strength to withstand expansion forces and external impacts.
Data Source
AI summary
A battery module includes a plurality of rechargeable batteries, end plates at outer sides of the rechargeable batteries; fixing members fixed to the end plates, each fixing member having a support step protruding from at least one side end, a reinforcement member contacting the fixing member, and a fastener fixing the fixing member and the reinforcement member to the end plate.