Battery Module Layout With End-Tab PCB Connections
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Solution Overview
Problem
The existing composite battery cell solutions for mobile devices face challenges in optimizing battery life due to the large size of the protection circuit board required for connecting multiple battery cells, which limits space for other electrical components and reduces battery capacity.
Innovation Solution
A battery module design where adjacent battery cells are connected through conductive elements, and only the tabs at the ends of the battery cell component are connected to the protection circuit board, reducing the space occupied by welding plates and allowing for a smaller protection circuit board, thereby increasing space for other components and improving battery capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all battery cell tabs are connected to the protection circuit board, then electrical connection reliability is improved, but the protection circuit board size increases and space for other components is reduced
Solution Approach 1:
The patent divides the battery cell component into multiple segments (first battery cell component and second battery cell component) with different connection configurations. The first component has tabs connected to the protection circuit board, while the second component has tabs connected to conductive elements that connect to the first component, reducing the number of direct PCB connections needed.
Solution Approach 2:
The patent introduces conductive elements as intermediary components between the battery cell tabs and the protection circuit board. These conductive elements serve as mediators to establish electrical connections, allowing the protection circuit board to be smaller while maintaining connection reliability through the conductive element network.
2Reliability
If a large protection circuit board is used to connect all battery cell tabs, then electrical connection is ensured, but space for other electrical components is reduced
Solution Approach 1:
The battery cell component is segmented into multiple groups with different connection strategies. Some tabs connect directly to the protection circuit board, while other tabs connect through conductive elements to intermediate connection points, reducing the overall footprint required for the protection circuit board.
Solution Approach 2:
Conductive elements are introduced as intermediary components to establish electrical connections between battery cell tabs and the protection circuit board. This intermediary connection approach allows for a more compact layout where the protection circuit board does not need to accommodate all tab connections directly, freeing up space for other electrical components.
3Volume of moving object
If battery cells are arranged in a compact configuration, then device volume is reduced, but heat dissipation becomes more difficult
Solution Approach 1:
The battery cell component is divided into multiple segments arranged in a specific configuration. This segmentation allows for strategic placement of heat dissipation structures between and around the battery cell groups, enabling effective heat management within a compact volume by creating thermal pathways without requiring excessive spacing.
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
This design effectively reduces the size of the protection circuit board, allowing for a more compact layout that enhances battery capacity and space for other electrical components within the terminal device.
Implementation Method 1
adjacent battery cells are electrically connected through the conductive element
Implementation Method 2
the battery cells located at two ends of the battery cell component are electrically connected to the protection circuit board through corresponding tabs
Data Source
AI summary
A battery module includes: a battery cell component, including at least two battery cells arranged in a preset direction; a conductive element, wherein adjacent battery cells are electrically connected through the conductive element; and a protection circuit board, wherein the battery cells located at two ends of the battery cell component are electrically connected to the protection circuit board through corresponding tabs, respectively.