Battery Pack Assembly with Integrated Case Frame
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Solution Overview
Problem
Conventional battery pack assemblies for eco-friendly vehicles have low space efficiency due to the inclusion of end plates and various components like wire harnesses and BMS, which occupy valuable space and reduce the packing density of battery cells.
Innovation Solution
The proposed battery pack assembly eliminates the need for end plates by using a case with a frame shape, surface pressure pads, and elastic parts to secure and pressurize battery cells, allowing for a more compact configuration and improved airtightness, while maintaining effective cell fixation and swelling prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If end plates and various components (wire harness, BMS) are mounted in the case of the battery pack, then the battery cells are secured and maintained, but the space efficiency of the battery pack is degraded
Solution Approach 1:
The patent merges the functions of end plates, wire harness mounting, and BMS housing into a single integrated case structure. The case includes side walls that directly secure battery cells, integrate wire harness routing channels, and provide mounting surfaces for BMS components, eliminating the need for separate end plates and reducing overall component count and space occupation.
Solution Approach 2:
The case is designed as a multi-functional component that simultaneously serves as: (1) a structural frame for securing battery cells, (2) a housing for wire harnesses with integrated routing paths, (3) a mounting structure for BMS components, and (4) a protective enclosure. This universal design consolidates multiple functions into one component, improving space efficiency while maintaining all necessary battery pack functions.
2Stability of the object's composition
If end plates are disposed at the outermost position of battery cells to maintain surface pressure, then battery cell stability is improved, but device complexity and space occupation increase
Solution Approach 1:
The case's side walls are designed to directly contact and secure the battery cells at their outermost positions, replacing the traditional separate end plates. The side walls provide the necessary surface pressure and structural support that end plates would otherwise provide, while being an integral part of the case structure rather than a separate component.
Solution Approach 2:
The invention extracts and eliminates the end plate component from the battery pack assembly by integrating its functions into the case structure. The case side walls assume the role of maintaining surface pressure and securing battery cells, removing the need for distinct end plate components and simplifying the overall device structure.
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
This design enhances space efficiency, allows for increased battery cell density, and maintains the airtightness and durability of the battery pack assembly, thereby improving the mileage and performance of eco-friendly vehicles.
Implementation Method 1
an elastic part elastically deformed by the cut area and abutting the respective surface pressure pad
Data Source
AI summary
A battery cell unit may include: a plurality of prismatic battery cells; and a support bar disposed on either side of the plurality of battery cells, and configured to fix the plurality of battery cells. The support bar may include a base part constituting the body of the support bar, and extended in the direction that the battery cells are stacked; a first bent part formed at each of first and second end portions of the base part and bent in the direction that the battery cells are stacked; a second bent part formed at the tops of the base part and the first bent part, and bent in the direction that the battery cells are stacked; and a fixing panel formed at each of the first and second end portions of the base part, and bent in the opposite direction of the first bent part.