Cylindrical Battery Holder Grooves for Chain Heating Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery packs face challenges in effectively suppressing heat conduction over a wide range due to the variable position of the air layer formed between the longitudinal groove and the cylindrical battery, and the inadequate absorption of abnormal heat generation by the heat absorbing member.
Innovation Solution
The battery pack incorporates a heat absorbing member disposed between cylindrical batteries, and a battery holder with an enclosure featuring a first groove extending axially and a second groove extending circumferentially, which are connected to enhance heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a longitudinal groove is provided on the inner surface of the battery holder to form an air layer between the groove and the cylindrical battery, then heat transfer from the overheated cylindrical battery is blocked and heat conduction between adjacent cylindrical batteries is suppressed, but the position where the air layer is formed depends on the form of the longitudinal groove and it may be difficult to suppress heat conduction over a wide range depending on heat transfer direction
Solution Approach 1:
The single longitudinal groove is divided into multiple segments: a first groove extending in the longitudinal direction and a second groove extending in the circumferential direction, which are connected to each other. This segmentation creates multiple air layers at different positions around the cylindrical battery, enabling heat conduction suppression in multiple directions simultaneously.
Solution Approach 2:
The heat dissipation structure transitions from a one-dimensional longitudinal groove to a two-dimensional network combining longitudinal and circumferential grooves. This dimensional expansion allows the air layers to block heat transfer from multiple directions (longitudinal and circumferential), significantly widening the heat conduction suppression range.
2Reliability
If a heat absorbing member is provided in contact with the side surface of each unit cell between the unit cells of the battery unit, then abnormal heat generation can be absorbed, but depending on the structure of the recess of the housing in which the heat absorbing member can be disposed, abnormal heat generation may not be suitably absorbed
Solution Approach 1:
The heat absorbing member is merged with the battery holder structure, where the battery holder itself serves as the housing that contains the heat absorbing member. This integration eliminates the need for separate recess structures in the housing, reducing device complexity while maintaining heat absorption functionality.
Solution Approach 2:
The battery holder is designed to serve multiple functions: it houses the cylindrical batteries, provides structural support, and contains the heat absorbing member for thermal management. This multi-functionality reduces the need for additional components and simplifies the overall 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 configuration effectively suppresses heat transfer over a wide range, preventing chain heating and ensuring efficient cooling of the cylindrical batteries, thereby minimizing the risk of battery pack failure.
Implementation Method 1
a heat absorbing member disposed between one cylindrical battery and another cylindrical battery of the plurality of cylindrical batteries
Implementation Method 2
an air layer is formed between a longitudinal groove provided on an inner surface of an insertion portion of the battery holder into which the cylindrical battery is inserted and extending in a longitudinal direction of the cylindrical battery and an outer peripheral surface of the cylindrical battery
Data Source
AI summary
A battery pack is provided including a plurality of cylindrical batteries; a heat absorbing member disposed between one cylindrical battery and another cylindrical battery of the plurality of cylindrical batteries; and a battery holder that houses the plurality of cylindrical batteries and the heat absorbing member, in which the battery holder includes an enclosure along an outer periphery of the plurality of cylindrical batteries, a first groove extending along an axial direction of the cylindrical battery housed in the battery holder and a second groove extending along a circumferential direction of the cylindrical battery housed in the battery holder are provided on an inner surface of the enclosure of the battery holder, and the first groove and the second groove are connected to each other.