Stacked Protection Board Layout for High-Current Battery Charging
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Solution Overview
Problem
In lithium batteries, the size of the protection board needed to handle high current charging is larger, which reduces the battery cell size and capacity when the battery size is fixed.
Innovation Solution
A protection board design that includes an access board, a diverter board, a rigid board, and connection boards, where the diverter board is bent around the rigid board, allowing current to flow through two paths and reducing the size of the access board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the protection board is designed to handle high current charging, then the charging power is improved, but the size of the protection board increases
Solution Approach 1:
The patent transitions from a planar layout to a three-dimensional stacked configuration. The access board and connection board are arranged in different layers with vertical connections, allowing current to flow through multiple spatial paths. This dimensional change enables high current handling without increasing the footprint area of the protection board.
Solution Approach 2:
The protection board is divided into functionally independent boards (access board, connection board, rigid board) that can be separately optimized. Each board handles specific current paths, and the segmented structure allows for better current distribution and reduced interference, enabling high power handling in a compact form.
2Power
If the protection board size is increased to handle high current, then the charging performance is improved, but the battery cell size must be reduced
Solution Approach 1:
By utilizing vertical stacking instead of horizontal expansion, the patent achieves high current capability without increasing the planar footprint. This allows the battery cell to maintain its volume while the protection board handles high charging currents through its three-dimensional current paths.
3Quantity of substance
If the protection board size is reduced to maintain battery capacity, then the battery capacity is improved, but the current handling capability must be reduced
Solution Approach 1:
The stacked configuration with vertical current paths enables the protection board to handle high currents while occupying minimal planar space. This allows maximum battery cell volume to be utilized for capacity while the compact protection board maintains high current handling through its three-dimensional structure.
Data Source
AI summary
Provided are a protection board and a battery. The protection board includes an access board, a diverter board, a rigid board, and at least one connection board. The rigid board, the diverter board and the connection board are all connected to the access board. The rigid board and the access board are stacked to each other. The diverter board is located on one side of the access board and is bent around the rigid board, and at least one connection board is located at one end of the access board along its extension direction. The present application provides a protection board with small size and a battery with large capacity.