Battery Cell Heating Film Layout for Uniform Cylindrical Heating
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Solution Overview
Problem
Cylindrical battery cells experience non-uniform heating due to serpentine plate heating films, leading to variations in temperature across regions, affecting charging and discharging capabilities and reducing safety performance and cycle life.
Innovation Solution
A battery assembly with a heating film attached to the peripheral side face of the battery cell, comprising a first insulating layer, a heating layer, and a second insulating layer, which generates heat energy to uniformly heat the battery cell, ensuring all regions have the same temperature and improving safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a serpentine plate heating film is used to heat the battery cell, then the battery cell can be heated, but the heating is non-uniform causing temperature variations across regions
Solution Approach 1:
The heating film is divided into multiple independent heating sections (first heating section, second heating section, third heating section) that are separately arranged on different surfaces of the battery cell. Each heating section can be independently controlled to achieve uniform temperature distribution across the entire battery cell, resolving the non-uniform heating issue while maintaining safety performance.
Solution Approach 2:
Different heating sections are positioned at specific locations (side surface, first end surface, second end surface) based on the local thermal requirements of the battery cell. This localized heating approach ensures that each region receives appropriate heat treatment, achieving overall temperature uniformity and improving safety performance.
2Temperature
If a serpentine plate heating film is used to heat the battery cell, then the battery cell can be heated, but temperature variations affect charging and discharging capabilities
Solution Approach 1:
The heating film is segmented into multiple heating sections positioned at different locations on the battery cell. This segmentation enables precise thermal control of each region, ensuring uniform temperature distribution that maintains optimal charging and discharging capabilities across the entire battery cell.
Solution Approach 2:
The heating system controls the temperature parameters of different heating sections to maintain the battery cell within the optimal operating temperature range (25°C to 30°C). By adjusting heating parameters and distributing heat uniformly, the charging and discharging capabilities are preserved and improved.
3Temperature
If a serpentine plate heating film is used, then heating function is provided, but the heating efficiency is reduced due to non-uniform heating
Solution Approach 1:
The heating film is divided into multiple heating sections that are independently positioned on different surfaces of the battery cell. This segmentation eliminates dead zones and ensures comprehensive heat coverage, improving heating efficiency and reducing energy loss by directing heat precisely where needed.
Solution Approach 2:
Heating sections are strategically positioned at the side surface and end surfaces of the battery cell to address local thermal requirements. This localized heating approach improves overall heating efficiency by ensuring uniform temperature distribution and minimizing energy waste in areas that do not require heating.
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
The solution ensures uniform heating of the battery cell, enhancing safety performance, prolonging cycle life, and improving heating efficiency by maintaining consistent charging and discharging capabilities across all regions.
Implementation Method 1
The heating layer is configured to receive a current to generate heat energy to heat the battery cell
Data Source
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AI summary
A battery assembly (100), a battery module, and an electricity-consumption apparatus are provided in the disclosure. The battery assembly (100) includes a battery cell (110) and a heating film (120). The battery cell (110) is configured to provide energy and has a peripheral side face (111). The heating film (120) is attached to the peripheral side face (111) of the battery cell (110) for heating the battery cell. The heating film (120) includes a first insulating layer, a heating layer, and a second insulating layer that are sequentially stacked. The first insulating layer is closer to the peripheral side face (111) of the battery cell than the second insulating layer. The heating layer (120) is configured to receive a current to generate heat energy to heat the battery cell (110). The heating film (120) of the battery assembly (100) covers the peripheral side face (111) of the battery cell (110), so that the battery cell can be heated uniformly.