Battery Pack Noise Reduction via Terminal Capacitor Grounding
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Solution Overview
Problem
The stability of battery pack output is compromised due to noise generated from an inverter connected to the battery pack, leading to output fluctuations and potential exposure to high voltage during assembly or repair.
Innovation Solution
A battery pack design that includes capacitors electrically connected to external input and output terminals and grounded to the base plate, which block noise currents and prevent interference from inverter noise, improving output stability and worker safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery pack is connected to an inverter for high output and large capacity, then the power supply capability is improved, but noise current from the inverter interferes with the battery pack output stability
Solution Approach 1:
A capacitor is introduced as an intermediary component between the inverter and the battery pack terminals. The capacitor filters out noise current generated by the inverter's fast switching operations, allowing the high power capability to be maintained while preventing noise from reaching the battery pack output terminals, thus preserving output stability
2Power
If the battery pack uses high voltage for high output, then the power capability is improved, but workers are exposed to high voltage during assembly or repair
Solution Approach 1:
The capacitor serves as a safety intermediary by providing a controlled path for noise current and potentially hazardous electrical transients. By grounding the capacitor to the base plate, it creates a safe discharge path that protects workers from high voltage exposure during assembly or repair operations
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 capacitors effectively reduce noise interference, enhancing the stability of the battery pack output and ensuring worker safety during assembly or repair by grounding noise currents to the base plate.
Implementation Method 1
a capacitor may be present at the first or second wall adjacent to a corresponding one of the external input and output terminals, the capacitor being electrically connected to said corresponding one of the external input and output terminals
Implementation Method 2
The capacitor may be grounded to the base plate via the first or second wall... the capacitor may reduce a noise current
Data Source
AI summary
Disclosed herein is A battery pack comprising: a pack housing; a base plate; at least two battery modules arranged such that the battery modules are located in a space defined between the pack housing and the base plate, each battery module including a plurality of battery cells or unit modules which can be charged and discharged; a first wall located at a first side of the base plate; a second wall located at a second side of the base plate; an external input terminal and an external output terminal are located at both of the first wall and the second wall, the battery modules being connected to the external input and output terminals in a state in which the battery modules are electrically connected in series or in parallel to each other; and a capacitor is present at the first or second wall adjacent to a corresponding one of the external input and output terminals, the capacitor being electrically connected to said corresponding one of the external input and output terminals.