Battery Stack Pressing Jig for Module-Free Pack Assembly
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Solution Overview
Problem
The manufacturing process of new battery packs, which directly stack batteries without a battery module, faces challenges in maintaining the shape of the battery stack within the pack casing due to the lack of a configuration for applying surface pressure.
Innovation Solution
A battery pack manufacturing apparatus with a main pressing jig and an auxiliary pressing jig, featuring movable pressing parts and blocks with specific configurations and concave-convex portions, is used to grip and maintain the shape of the battery stack during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery stack is directly disposed in the pack casing without a battery module, then energy density is improved, but the battery stack shape cannot be maintained without additional pressing configuration
Solution Approach 1:
The pressing apparatus applies pressure to the battery stack in advance during the manufacturing process to maintain its shape before final assembly. The main pressing jig and auxiliary pressing jig are positioned and activated prior to completing the assembly, ensuring the battery stack is pre-compressed to the required density and shape, preventing collapse during subsequent handling and assembly operations.
Solution Approach 2:
The pressing apparatus acts as an intermediary device between the battery stack and the pack casing. It provides the necessary compressive force through the main pressing jig and auxiliary pressing jig, mediating the transition from loose stacked batteries to a compact, shape-maintained battery unit that can be securely installed in the pack casing without requiring traditional battery modules.
2Volume of moving object
If endplates are removed to improve energy density, then volume efficiency is improved, but the battery stack lacks structural support for shape maintenance
Solution Approach 1:
The traditional mechanical endplate structure is replaced with a pressing apparatus system consisting of a main pressing jig and auxiliary pressing jig. Instead of relying on rigid endplates to provide structural support, the system uses controlled mechanical pressing forces applied during assembly to maintain the battery stack's shape and structural integrity, achieving the same support function without the volume occupied by endplates.
Data Source
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AI summary
A battery pack manufacturing apparatus (10) includes a main pressing jig (100) including two main pressing parts configured to be movable toward or away from each other, and an auxiliary pressing jig (200) including two auxiliary pressing parts configured to be movable toward or away from each other, in which the main pressing jig and the auxiliary pressing jig are configured such that the main pressing part passes through the auxiliary pressing part when the main pressing part or the auxiliary pressing part moves in a first direction (W) in a state in which the main pressing part and the auxiliary pressing part are disposed to overlap each other in a second direction (H) intersecting the first direction.