Battery Pack Power Board Segmentation for Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery packs face challenges in downsizing while increasing capacity, as widening power lines to enhance current flow leads to noise interference with digital circuits, making it difficult to achieve smaller yet larger capacity packs.
Innovation Solution
The battery pack design separates the power unit from the voltage and control units on different boards, with thicker wiring on the power board to handle increased current without widening the power lines, reducing noise interference and allowing for thinner boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power lines are widened to increase current flow, then the current capacity is improved, but the board size cannot be downsized and noise interference increases
Solution Approach 1:
The patent divides the circuit board into two separate boards: a power board for high-current power lines and a control board for digital circuits. This segmentation allows each board to be optimized independently - the power board can have thick wiring for high current without increasing overall size, while the control board remains thin and small for digital circuit integrity.
2Power
If the power lines are widened to increase current flow, then the current capacity is improved, but noise interference with digital circuits increases
Solution Approach 1:
The patent extracts the power unit from the control board and places it on a separate power board. This physical separation removes the noise source (thick power lines carrying high current) away from the sensitive digital circuits on the control board, eliminating electromagnetic interference while still allowing high current flow through the dedicated power board.
3Volume of stationary object
If the board is downsized to reduce battery pack size, then the battery pack volume is reduced, but the current capacity cannot be increased
Solution Approach 1:
The patent utilizes the vertical dimension by stacking the power board and control board in layers. This allows the high-current power lines to be positioned in one layer while digital circuits are positioned in another layer, enabling compact three-dimensional integration that increases current capacity without increasing the horizontal footprint or overall battery pack volume.
Data Source
AI summary
A battery pack (1) includes: a battery stack (20) in which a plurality of laminar battery cells (10) are connected in series; a voltage monitoring unit (3) that monitors the voltage of each battery cell; a power unit (4) that has power lines (41p, 41n) for connecting the battery stack (20) and external connection terminals (42p, 42n), a current monitoring unit (44) for monitoring the current of the power lines, and a switch (43) for disconnecting the power lines; and a control unit (5) that receives signals from the voltage monitoring unit and the current monitoring unit, and outputs to the switch a signal for shutting off the power line. The power unit (4) is provided on a power board (74) separately from boards (73, 75) on which the voltage monitoring unit (3) and the control unit (5) are provided. Wiring formed on the power board (74) is thicker than that formed on the boards (73, 75) on which the voltage monitoring unit and the control unit are provided.