Laminate Battery Pack Gas Collection and Heat Dissipation
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Solution Overview
Problem
Conventional laminate battery packs face operational instability due to gas leakage from electrode terminals when connected in series, leading to potential malfunction and reduced battery characteristics.
Innovation Solution
The battery pack design features electrode terminals on one side and a bag part on the opposite side, with the bag part positioned at the upper surface to collect gas generated during charging and discharging, while the power cable for charging and discharging is placed below to facilitate efficient gas collection and heat dissipation, preventing overheating and maintaining battery efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bag part is disposed at one side part of the laminate battery to collect gas, then gas collection function is improved, but gas easily flows back to the tabs when multiple batteries are connected, causing leakage and operational failure
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the bag part at the opposite end from the tabs. Instead of placing the gas collection bag near the tabs (conventional approach), it is positioned at the far end of the battery pack, creating maximum distance to prevent gas backflow to the tabs while maintaining effective gas collection from the layered body.
Solution Approach 2:
The patent utilizes the longitudinal dimension of the battery pack by arranging the bag part at the opposite end along the length of the battery, creating a linear gas flow path from the layered body through the battery interior to the bag part, thereby establishing a one-dimensional gas collection pathway that prevents backflow to the tabs.
2Temperature
If the power cable is disposed at the lower side of the battery pack, then heat dissipation is improved, but this configuration must be integrated with the bag part positioning to prevent malfunction
Solution Approach 1:
The patent applies local quality by creating distinct functional zones within the battery pack: the lower side is designated for heat dissipation with the power cable positioned there, while the upper side is designated for gas collection with the bag part positioned there. This spatial differentiation of functions prevents thermal interference with the control board and ensures reliable operation.
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 configuration enhances operational stability, prevents gas leakage, and maintains high battery efficiency by effectively collecting gas and dissipating heat, resulting in a reliable and efficient battery pack.
Implementation Method 1
a bag part having a space a volume of which is changeable, and communicating to the battery part through a communication part
Implementation Method 2
heat easily radiates at this part, and thus malfunction of a control board caused by the heat generation, or accelerating deterioration of battery characteristics caused by the heated laminate battery can be inhibited
Data Source
Figure 1~2
Figure 3~4
Figure 5(a)~5(b)
AI summary
A battery pack containing a plurality of plate-shaped laminate batteries arranged in a direction vertical to a plate-shaped surface of one of the laminate batteries. The laminate battery contains: a layered body which includes a negative electrode, a separator, and a positive electrode, and is disposed parallel to the plate-shaped surface of the laminate battery; an outer packaging including a laminate film enclosing the layered body; and an electrode terminal which is electrically connected to the layered body and extends from a one side part of the outer packaging. The outer packaging has, in an inside thereof, a battery part having a space in which the layered body exists and a bag part which has a space a volume of which is changeable, communicates to the battery part through a communication part, and is disposed on an other side part opposite to the one side part. The battery pack includes: the laminate batteries arranged in a manner to have the other side part on an upper side of the battery pack in the vertical direction, and to have the one side part on a lower side of the battery pack in the vertical direction; and a power cable for charging and discharging on the battery pack is disposed in the lower side of the battery pack in the vertical direction. The battery pack is a highly reliable battery pack which exhibits the excellent operational stability, i.e., can maintain the high efficiency.