Flexible Battery Pack Circuit Layout for Slim Stable Connections
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Solution Overview
Problem
Existing battery packs for devices like electric vehicles and hybrid vehicles face challenges in achieving a compact, slim structure with efficient electrical connections for battery cells, particularly in managing power and capacity requirements.
Innovation Solution
A battery pack design featuring a battery cell with first and second surfaces and a lateral surface, connected by first and second circuit boards through flexible wiring, utilizing compressible conductive adhesives and insulating layers for electrical connections, allowing for a slim and efficient charge-discharge path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional rigid circuit boards and wiring structures are used, then electrical connection stability is improved, but battery pack height increases and compactness deteriorates
Solution Approach 1:
The patent uses flexible printed circuit boards (FPC) instead of traditional rigid circuit boards. The FPC can be bent and conform to the battery cell surface, significantly reducing the battery pack height while maintaining electrical connection stability through its flexible yet conductive structure.
Solution Approach 2:
The circuit boards are arranged on opposite surfaces of the battery cell rather than stacked vertically, utilizing the lateral dimension of the battery cell. This dimensional reconfiguration reduces height requirements while preserving electrical connection paths through the flexible wiring crossing the lateral surface.
2Reliability
If multiple circuit boards and wiring components are used for electrical connections, then connection reliability is improved, but structural complexity increases
Solution Approach 1:
The patent integrates the first and second circuit boards with the battery cell surfaces, using the battery cell itself as the mounting substrate. The flexible wiring connects these integrated circuit boards, merging multiple components into a compact unified structure that reduces overall complexity while maintaining connection reliability.
Solution Approach 2:
The flexible wiring serves multiple functions: it provides electrical connection between circuit boards, conforms to the battery cell geometry, and enables compact integration. This multi-functionality reduces the need for separate structural support components, simplifying the overall electrical connection structure.
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
The design achieves a low-height, slim battery pack with stable electrical connections, reducing the overall height and ensuring efficient power transmission while maintaining structural integrity and electrical insulation.
Implementation Method 1
a first compressible conductor on an inner surface of the first circuit board, the inner surface facing the first electrode
Implementation Method 2
a first compressible conductor on an inner surface of the first circuit board, the inner surface facing the first electrode
Implementation Method 3
a flexible wiring crossing the lateral surface of the battery cell and electrically connecting the first and second circuit boards to each other
Implementation Method 4
a first insulating adhesive layer may be arranged on the inner surface of the first circuit board and may surround the first compressible conductor
Data Source
AI summary
A battery pack includes: a battery cell including a first surface and a second surface which are opposite each other and on which first and second electrodes are respectively formed, and a lateral surface connecting the first and second surfaces to each other; a first circuit board arranged on the first surface and connected to the first electrode; a second circuit board arranged on the second surface and connected to the second electrode; and a flexible wiring crossing the lateral surface of the battery cell and electrically connecting the first and second circuit boards to each other, and the first circuit board includes: a first compressible conductor on an inner surface of the first circuit board, the inner surface facing the first electrode; and a first pressing surface and a first mounting portion on an outer surface of the first circuit board.