Battery Pack Venting Structure for Rigidity and Energy Density
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Solution Overview
Problem
Existing battery packs face challenges in maintaining rigidity while improving energy density, and there is a need for efficient discharge of gases generated within the battery units.
Innovation Solution
The battery pack design eliminates reinforcing parts and coupling parts, utilizing elongated cases with integrated vent passages and coolant passages to maintain rigidity and facilitate gas discharge without occupying additional space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcing parts and coupling parts are provided in the housing, then rigidity of the battery pack is maintained, but space utilization and energy density are deteriorated
Solution Approach 1:
The patent merges the reinforcing part and coupling part into a single integrated structure. The coupling part includes coupling protrusions that extend from the housing wall to provide both structural reinforcement and mechanical coupling functionality, eliminating the need for separate reinforcing components and thereby improving space utilization and energy density while maintaining rigidity
2Stability of the object's composition
If reinforcing parts are provided between battery modules, then structural stability is improved, but available space for battery cells is reduced
Solution Approach 1:
The reinforcing function is merged with the coupling part structure. The coupling part includes reinforcing ribs or protrusions that extend into the housing interior to provide structural stability between battery modules, while being integrated into the coupling mechanism itself, thus not occupying additional space beyond what is already required for the coupling function
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 energy density and ensures stable mounting of battery units while effectively discharging gases, maintaining structural integrity and minimizing thermal propagation.
Implementation Method 1
a vent passage (30) which extends from the inner bottom surface (14a) of the housing (10) to discharge a gas generated in each of the plurality of battery units (20) to the outside of the housing (10)
Implementation Method 2
a coolant passage disposed between the inner bottom surface and the outer bottom surface of the housing and partitioned from the first passage
Implementation Method 3
a coolant passage disposed between the inner bottom surface and the outer bottom surface of the housing
Data Source
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AI summary
A battery pack according to an embodiment of the present invention may include: a housing, and a plurality of battery units disposed in the housing. Each of the battery units may include: a first battery cell extending in a width direction of the housing; a second battery cell disposed at one side of the first battery cell in the width direction of the housing and aligned in parallel to the first battery cell; and a rigid case extending in parallel to the width direction of the housing to integrally accommodate the first battery cell and the second battery cell. The case may include: a first vent hole facing the first battery cell; and a second vent hole facing the second battery cell, wherein a vent passage communicating with the first vent hole and the second vent hole may be provided in the housing.