Battery Module Busbar Structure for Wider Electrode Leads
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Solution Overview
Problem
Conventional battery modules have limitations in increasing the width of electrode leads due to the sensing area, which restricts the reduction of heat generation and resistance in battery cells, especially with the growing interest in quick charging performance.
Innovation Solution
A novel connection structure is introduced where the busbar frame is located between the battery cell stack and the sensing assembly, allowing the electrode lead to pass through a slit and be joined to the busbar on one surface, while the joining member is joined to the opposing surface of the busbar, enabling a wider electrode lead without compromising the joining area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the width of electrode lead is increased to reduce resistance and heat generation, then the quick charging performance is improved, but the available joining area on the busbar is reduced
Solution Approach 1:
The patent transitions from a single-sided joining configuration to a dual-sided joining configuration. The electrode lead is joined to both the front surface and rear surface of the busbar, effectively utilizing two dimensions of the busbar for joining purposes. This dimensional expansion allows the electrode lead width to be increased while maintaining sufficient joining area through the combined front and rear surface areas.
2Reliability
If the width of electrode lead is increased to reduce resistance, then the electrical conductivity is improved, but the structural space for joining members is reduced
Solution Approach 1:
The patent utilizes the rear surface of the busbar as an additional joining dimension. This allows the electrode lead to be connected to both front and rear surfaces, effectively doubling the available joining perimeter. The increased dimensional utilization provides sufficient structural space for joining members even when the electrode lead width is increased to improve electrical conductivity.
3Power
If the electrode lead width is increased to improve quick charging performance, then the power transmission capability is improved, but the sensing assembly mounting area is reduced
Solution Approach 1:
By utilizing both front and rear surfaces of the busbar for electrode lead joining, the patent effectively expands the available mounting perimeter. This dual-sided joining approach creates additional space that can accommodate the sensing assembly mounting requirements even when the electrode lead width is increased to enhance power transmission capability for quick charging.
Data Source
AI summary
A battery module according to one embodiment of the present disclosure includes a battery cell stack in which a plurality of battery cells including electrode leads are stacked; a busbar frame located on one surface of the battery cell stack in a direction in which the electrode leads protrude; a busbar mounted on the busbar frame; and a sensing assembly mounted on the busbar frame and including a joining member, wherein a first surface of the busbar and the electrode lead are joined, and a second surface of the busbar and the joining member are joined, and wherein the first surface and the second surface are surfaces facing each other.