Battery Cell Sampling Layout Using Inter-Cell Space
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Solution Overview
Problem
Existing battery technologies face challenges in maintaining energy density and safety due to the space occupied by conventional sampling apparatuses, which decrease the overall efficiency and increase the risk of inconsistencies among battery cells, potentially leading to accidents.
Innovation Solution
A battery design that incorporates a sampling member partially located between adjacent battery cells, connected to protruding electrode terminals, allowing for signal collection while minimizing space usage and enhancing structural stability and electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional sampling apparatus is installed in the battery, then signal collection capability is improved, but the energy density of the battery decreases due to the space occupied by the sampling apparatus
Solution Approach 1:
The sampling member is nested within the gaps between adjacent battery cells, utilizing the existing inter-cellular space rather than adding external components. This nesting approach allows the sampling apparatus to be integrated into the battery structure without occupying additional volume, thereby maintaining energy density while achieving signal collection functionality.
Solution Approach 2:
The sampling member extends in the first direction (along the arrangement of battery cells) rather than occupying transverse space. By positioning the sampling member to span across multiple cells in the longitudinal direction and utilizing the gaps between cells, the design transforms the spatial occupation from a volumetric constraint to a linear arrangement that preserves overall battery density.
2Quantity of substance
If the sampling member is located between adjacent battery cells, then space utilization is improved and energy density increases, but the structural complexity of connecting to electrode terminals increases
Solution Approach 1:
The sampling member is designed with multiple connecting portions that can simultaneously connect to electrode terminals of different polarity. This multi-functional design allows a single component to perform signal collection from multiple cells and establish electrical connections with both positive and negative terminals, reducing the number of separate components needed and simplifying the overall connection structure.
Solution Approach 2:
The sampling member is divided into multiple connecting portions, each capable of independently connecting to electrode terminals. This segmentation allows the sampling member to adapt to the specific arrangement of electrode terminals between adjacent cells, simplifying the connection process by breaking down the complex multi-terminal connection task into manageable segments.
3Ease of operation
If electrode terminals protrude from the can, then the sampling member can be connected to them, but the manufacturing precision requirements increase
Solution Approach 1:
The connecting portions of the sampling member are designed with elastic deformation capability, allowing them to dynamically adjust to variations in electrode terminal protrusion positions. This dynamic adaptation enables the connecting portions to maintain reliable electrical contact even when manufacturing tolerances cause slight deviations in protrusion height or position, thereby reducing the stringency of manufacturing precision requirements.
Solution Approach 2:
The elastic properties of the connecting portions are utilized to transform rigid dimensional constraints into flexible contact mechanisms. By changing the mechanical parameter of the connecting portions from rigid to elastic, the system can accommodate a wider range of protrusion parameters without compromising connection reliability, thus lowering manufacturing precision requirements.
Data Source
AI summary
Embodiments of this application provide a battery, an electric apparatus, and a method and an apparatus for preparing a battery. The battery includes: a battery unit, including a plurality of battery cells, where the plurality of battery cells are arranged in a first direction and electrically connected to each other, each of the battery cells includes a can and two electrode terminals of opposite polarities, the two electrode terminals are respectively disposed at two ends of the can in the first direction, and at least one of the electrode terminals protrudes from the can in a direction leaving an interior of the battery cell; and a sampling member, where the sampling member is at least partially located between two adjacent ones of the battery cells, connected to the electrode terminals protruding from the can, and configured to perform signal collection on the connected battery cells.