Capacitor Busbar Integration for Inductance Reduction
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Solution Overview
Problem
Electrical energy storage devices experience power dissipation and heat generation due to high inductance, which negatively affects their electrical characteristics, lifetime, and reliability.
Innovation Solution
The capacitors are arranged directly on an insulated busbar, reducing the total inductance of the assembly by minimizing the distance between capacitors and the busbar, and using an insulation layer to isolate the busbar, thereby reducing heat energy and enhancing the device's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If capacitors are connected in parallel and/or series to form a capacitor assembly, then the desired total capacity is achieved, but power dissipation increases and heat is generated
Solution Approach 1:
The patent transitions from conventional discrete capacitor connections to a continuous film capacitor structure where the capacitive element is formed as a thin film deposited directly on the busbar. This dimensional change eliminates traditional connection points and reduces inductance, thereby decreasing power dissipation while maintaining the required total capacity through the continuous capacitive structure.
Solution Approach 2:
The patent merges the busbar and capacitor into a single integrated structure where the capacitive film is deposited directly on the busbar surface. This merging eliminates separate connection components and reduces the overall inductance of the assembly, reducing power dissipation while achieving the desired capacitance through the integrated design.
2Quantity of substance
If conventional capacitor assemblies are used, then electrical energy storage is achieved, but inductance and impedance remain high
Solution Approach 1:
The patent reduces inductance by transitioning from discrete component connections to a continuous film structure deposited directly on the busbar. This dimensional approach eliminates traditional connection points that contribute to inductance, achieving lower impedance while maintaining the required electrical energy storage capacity.
Solution Approach 2:
The patent extracts and eliminates traditional capacitor leads, connection terminals, and mounting structures that contribute to inductance. By depositing the capacitive film directly on the busbar surface, the design removes unnecessary inductive elements while preserving the essential energy storage function.
3Ease of operation
If capacitors are arranged away from the busbar for electrical connection, then connection is achieved, but inductance increases
Solution Approach 1:
The patent merges the capacitor and busbar into a single integrated structure where the capacitive film is deposited directly on the busbar surface. This eliminates the need for separate connection elements and minimizes the distance between capacitive elements and the current path, thereby reducing inductance while ensuring reliable electrical connection.
Solution Approach 2:
The patent transitions from three-dimensional discrete capacitor mounting to a two-dimensional continuous film deposition on the busbar surface. This dimensional change allows the capacitive structure to be in direct contact with the busbar, minimizing inductance while maintaining ease of electrical connection through the continuous film 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
This configuration decreases power dissipation and heat generation, improving the electrical characteristics, lifetime, and reliability of the energy storage device by lowering inductance and impedance.
Implementation Method 1
the busbar is covered at least partially by an insulation layer and the capacitors are connected to the busbar
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The present invention discloses an electrical energy storage device (1) comprising - several capacitors (2), and - a busbar (5) for electric power distribution, wherein the busbar (5) is covered at least partially by an insulation layer (21) and the capacitors (2) are connected to the busbar (5), wherein for reducing an inductance the capacitors (2) are arranged on the busbar (5), in particular directly on the insulation layer (21) of the busbar (5).