Mixed Battery Cell Layout for Energy Density and Safety Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery technologies face challenges in balancing electrical performance and safety, with high-energy density cells improving performance but increasing safety risks, and low-energy density cells enhancing safety but limiting electrical capacity.
Innovation Solution
A battery design incorporating two types of battery cells with different volumetric energy densities, where cells with higher energy density are used for better electrical performance and cells with lower energy density for improved safety, ensuring balanced performance by equalizing capacity and optimizing cell arrangement within a battery pack to prevent size mismatch and enhance overall energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cells with higher volumetric energy density are used, then electrical performance is improved, but safety performance deteriorates
Solution Approach 1:
The battery pack is segmented into multiple battery cell groups, where each group contains battery cells with different volumetric energy densities. This segmentation allows the system to combine high-energy-density cells (for electrical performance) with low-energy-density cells (for safety) within the same pack, resolving the contradiction between energy density and safety performance.
2Reliability
If battery cells with lower volumetric energy density are used, then safety performance is improved, but electrical performance deteriorates
Solution Approach 1:
The battery pack is divided into multiple groups containing different types of battery cells. Low-energy-density cells are placed in specific groups to enhance safety, while high-energy-density cells are placed in other groups to maintain electrical performance. This segmented approach allows both safety and electrical performance requirements to be satisfied simultaneously.
3Volume of stationary object
If battery cells of different sizes are arranged to equalize group sizes, then space utilization is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs three-dimensional arrangement strategies to accommodate battery cells of different sizes within battery cell groups. By utilizing multiple spatial dimensions and varying cell orientations, the system achieves equalized group sizes and optimal space utilization while managing the complexity of arranging different cell configurations.
Data Source
AI summary
A battery may include: a box; a first battery cell group and a second battery cell group, where the first battery cell and the second battery cell may have a same battery capacity and different volumetric energy densities. First battery cells in the first battery cell group and second battery cells in the second battery cell group may be arranged in a first direction (x), and the first battery cell group and the second battery cell group may be arranged in a second direction (y). A size of the first battery cell may be different from a size of the second battery cell in the first direction (x), and a size of the first battery cell group may be the same as a size of the second battery cell group in the first direction (x).