Pouch Cell Tab Bracket Layout for Welding Heat Isolation
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Solution Overview
Problem
Conventional pouch cell devices experience damage due to excessive heat transmission during the welding process, affecting yields.
Innovation Solution
A pouch cell device with a tab bracket that includes guiding and abutting portions to protect electrodes, maintaining a distance from pouch cells and preventing excessive heat transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrode sheets are fixed and connected to the circuit board by welding, then the pouch cells are connected in series and parallel to each other, but excessive heat energy is transmitted to the pouch cells during welding, damaging the pouch cells and affecting yields
Solution Approach 1:
The patent introduces an insulating bracket as an intermediary component between the electrode sheets and the pouch cells. This bracket supports the electrode sheets at a predetermined distance from the pouch cells, preventing direct heat transmission during welding while still enabling electrical connection to the circuit board. The insulating bracket thus mediates between the welding process and the pouch cells, blocking harmful heat transfer.
Solution Approach 2:
The patent segments the support function by introducing a separate insulating bracket component distinct from the electrode sheets and pouch cells. This segmentation allows the electrode sheets to be supported and positioned independently, enabling heat isolation during welding while maintaining electrical connectivity. The bracket is divided into multiple portions (first, second, third, and fourth portions) that collectively provide support and positioning functions.
2Ease of manufacture
If electrode sheets are directly connected to the circuit board, then electrical connection is achieved, but heat energy during welding damages the pouch cells
Solution Approach 1:
The insulating bracket serves as a mediator that enables the welding process to proceed while protecting the pouch cells. It provides a platform for supporting electrode sheets during welding, allowing easy manufacturing and assembly, while simultaneously preventing heat damage to the pouch cells, thus improving yield.
3Volume of moving object
If the tab bracket is disposed close to the pouch cells, then space is optimized, but heat protection effectiveness is reduced
Solution Approach 1:
The patent optimizes the distance parameter between the insulating bracket and the pouch cells. By setting this distance to a predetermined value, the design achieves a balance between space utilization and heat protection effectiveness. The bracket portions are configured with specific dimensions and spacing to maximize protective function while minimizing space consumption.
Data Source
AI summary
A pouch cell device and a tab bracket are provided. The pouch cell device includes a housing, and a battery pack, a tab bracket, and a series-parallel unit that are disposed in the housing. The battery pack includes a plurality of pouch cells, a plurality of first electrodes, and a plurality of second electrodes. The tab bracket is spaced apart from the battery pack, and includes a plurality of guiding portions and a plurality of abutting portions. The guiding portions gradually expand toward the battery pack. The abutting portions are respectively connected to the guiding portions. The first electrodes and the second electrodes respectively pass through the guiding portions and are abutted by the abutting portions. The series-parallel unit is electrically coupled to the first electrodes and the second electrodes.