Battery Partition Structure for Internal Series Tab Connection
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Solution Overview
Problem
Existing battery designs with series connections require external tab connections, occupying space and reducing energy density.
Innovation Solution
A battery design with a partition piece inside the housing that connects electrode assemblies in series, using a conductive region for internal tab connections and reducing external tabs, enhancing structural strength with insulation layers, and allowing for simplified circuit board packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple batteries are connected in series using external tab connections, then the output voltage is increased, but the space occupied in the battery pack increases and energy density is reduced
Solution Approach 1:
The patent merges multiple electrode assemblies into a single battery housing with internal series connections. The partition piece with conductive regions enables multiple electrode assemblies to be connected in series inside the housing, eliminating the need for external tab connections and reducing the space required in the battery pack.
Solution Approach 2:
The patent implements a nested structure where multiple electrode assemblies are placed inside a single battery housing. The partition piece with conductive regions allows these electrode assemblies to be nested within the same housing while maintaining series connection, effectively reducing the overall volume required for series-connected batteries.
2Reliability
If multiple tabs are led out of the housing for external connections, then electrical connectivity is achieved, but the circuit board structure becomes complex and packaging space increases
Solution Approach 1:
The patent extracts the series connection function from the external tab connections and relocates it to the internal partition piece with conductive regions. This extraction eliminates the need for multiple external tabs and complex circuit board connections, while maintaining reliable electrical connectivity between electrode assemblies.
Solution Approach 2:
The partition piece with conductive regions acts as an intermediary that provides internal series connections between electrode assemblies. This intermediary structure eliminates the need for complex external tab connections and simplifies the circuit board design by reducing the number of connection points required.
3Strength
If insulation layers are added to the partition piece, then structural strength and insulation performance are improved, but manufacturing complexity increases
Solution Approach 1:
The partition piece is constructed as a composite structure combining insulating material with integrated conductive regions. This composite design provides both structural strength and electrical insulation while maintaining manufacturability through a unified component that eliminates the need for separate insulation layers and conductive elements.
Data Source
AI summary
A battery, including a housing, a first electrode assembly, a first positive tab, a first negative tab, a second electrode assembly, a second positive tab, and a second negative tab. The first positive tab and the first negative tab are connected to the first electrode assembly. The second positive tab and the second negative tab are connected to the second electrode assembly. The battery further includes a partition piece. The partition piece is connected to the housing to define a first cavity and a second cavity on two sides of the partition piece respectively. The first electrode assembly is disposed in the first cavity, and the second electrode assembly is disposed in the second cavity. The partition piece contains a conductive region. The first positive tab and the second negative tab are electrically connected to the conductive region. The battery can increase the energy density of the battery.