Prismatic Battery Terminal Structure for Flexible Busbar Routing
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Solution Overview
Problem
The existing prismatic secondary batteries require separate design modifications to change the arrangement of positive and negative terminals, which increases development and production costs and complicates the design of busbars and modules.
Innovation Solution
A prismatic secondary battery with a hexahedral cell case featuring a terminal structure that includes a terminal body coupled to the top surface, extending surfaces to cover the terminals, and an extension terminal electrically connected to the terminals, allowing for easy rearrangement without redesigning the battery's internal structure, and an adhesive layer for enhanced heat dissipation and vibration resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate design modifications are made to change terminal arrangement, then terminal positioning flexibility is improved, but device complexity and production costs increase
Solution Approach 1:
The terminal structure is segmented into a terminal body and an extension terminal. The terminal body remains fixed on the battery, while the extension terminal can be independently positioned and connected via extension wires. This segmentation allows flexible terminal arrangement without requiring redesign of the entire battery structure.
Solution Approach 2:
Extension wires serve as intermediaries connecting the fixed terminal body to the extension terminal. This intermediary mechanism enables flexible positioning of the extension terminal while maintaining electrical connection, resolving the contradiction between fixed structure and flexible arrangement.
2Adaptability or versatility
If terminals are disposed on opposing sides or together on one side, then design specifications are met, but adaptability to different design requirements is reduced
Solution Approach 1:
The terminal structure transitions from a static fixed position to a dynamic configurable arrangement. The extension terminal can be positioned at different locations and connected via extension wires, allowing the terminal arrangement to adapt to different design specifications while maintaining structural stability through the fixed terminal body.
3Adaptability or versatility
If terminal structure is redesigned for different arrangements, then terminal positioning flexibility is improved, but manufacturing costs and production time increase
Solution Approach 1:
The terminal body is pre-configured on the battery with predetermined connection points. Extension terminals and extension wires are prepared separately and can be quickly connected to achieve different terminal arrangements, eliminating the need for time-consuming redesign and remanufacturing processes.
4Ease of operation
If terminals are exposed on the battery surface, then electrical connection is simplified, but safety during venting is compromised
Solution Approach 1:
The extension wire acts as an intermediary that extends the electrical connection from the terminal body (protected inside the battery) to the extension terminal (exposed outside). This allows the terminal body to remain protected during venting while maintaining electrical connection functionality.
Solution Approach 2:
The terminal structure is segmented into a protected terminal body inside the battery and an exposed extension terminal outside. This segmentation allows the terminal body to be shielded from venting damage while the extension terminal remains accessible for electrical connection.
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
Enables flexible terminal arrangement, reducing production costs and enhancing safety by separating terminals from potential damage during venting, while maintaining existing internal cell manufacturing processes.
Implementation Method 1
the adhesive layer may strengthen at least one of a heat dissipation or a vibration resistance between the terminal structure and the cell case
Implementation Method 2
the joint part may be formed by welding
Data Source
AI summary
Disclosed herein relates to a secondary battery, including: a cell case including a cap plate, wherein the cell case has a hexahedral shape and accommodates an electrode assembly; a positive terminal and a negative terminal spaced apart from each other and disposed on a top surface of the cell case; a terminal structure comprising a terminal body coupled to the top surface of the cell case and one or more surfaces extending from the top surface while covering the positive or negative terminal, and an extension terminal electrically connected to the positive or negative terminal and exposed on any one surface of the terminal body except the top surface; and an extension wire electrically connecting the extension terminal to the positive or negative terminal and forming a joint part with the positive or negative terminal, the joint part being insulated from outside of the secondary battery.