Battery Support Conductivity Gradient for Uniform Cell Temperature
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Solution Overview
Problem
Existing battery modules exhibit non-uniform working temperature distribution due to differences in the arrangement of battery cells, leading to higher temperatures in the middle region and lower temperatures in the edge region, affecting charge and discharge performance and safety.
Innovation Solution
The battery design includes a support structure where the thermal conductivity of the support members in the battery cells varies based on position, with higher conductivity at the middle position and progressively decreasing conductivity towards the edge, facilitating faster heat transfer from the middle to the edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If battery cells are arranged in a regular structure (square or hexagonal) with uniform support members, then the manufacturing process is simple and device structure is uniform, but the working temperature distribution becomes non-uniform with higher temperatures in the middle region
Solution Approach 1:
The patent applies local quality by making the support members have different thermal conductivities based on their positions within the battery cell. Specifically, support members in the middle region have higher thermal conductivity than those at the edges, creating a non-uniform thermal conductivity distribution that compensates for the non-uniform heat generation and improves overall temperature uniformity across the battery module.
2Device complexity
If support members have uniform thermal conductivity throughout the battery, then the device structure is simple and manufacturing is easier, but heat transfer efficiency from the middle region to edge regions is insufficient
Solution Approach 1:
The patent implements local quality by varying the thermal conductivity of support members according to their spatial position. Support members located in the middle region of battery cells are designed with higher thermal conductivity to enhance heat transfer from hot spots, while edge region support members have lower thermal conductivity. This localized differentiation optimizes heat transfer efficiency without requiring a complete redesign of the entire support structure.
Solution Approach 2:
The patent applies parameter changes by modifying the thermal conductivity parameter of support members based on their position within the battery cell. The thermal conductivity is increased for support members in the middle region and decreased for those at the edges, creating a gradient distribution that improves heat transfer efficiency from high-temperature middle regions to lower-temperature edge regions.
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 achieves a more uniform working temperature distribution across the battery, enhancing its performance and safety by ensuring quicker heat dissipation from the middle to the edge regions.
Implementation Method 1
a thermal conductivity of the support member in the battery cell at a middle position is greater than a thermal conductivity of the support member in the battery cell at an outer position
Data Source
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AI summary
The present application relates to the technical field of batteries. Provided are a battery and an electrical device. The battery comprises at least one column of battery cell units arranged in columns and support members provided in respective battery cell units; amongst the battery cell units in the current column, the heat conductivity of the support member in the battery cell unit at the central position is greater than the heat conductivities of the support members in the battery cell units at outer positions. In the battery provided in the present application, the heat conductivities of the respective support members in the current column are decreasing from the central position to the edge positions, such that the efficiency of transferring heat outwards of the battery cell unit at the central position is higher than that of the battery cell units at the outer positions, resulting in a more uniform working temperature of the battery cells in the current column. When the battery consists of a plurality of columns of battery cells, the heat in the middle of the battery can be transferred to the edge more quickly, such that the working temperature of the middle area of the battery is the same or basically the same as the working temperature of the edge area, thus achieving a more uniform overall working temperature of batteries.