Battery Pole Through-Housing Layout for Thinner Cells
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Solution Overview
Problem
The size of the pole in conventional batteries limits the thickness of the cell, which affects the energy density and poses challenges in manufacturing thinner cells.
Innovation Solution
The pole is partially disposed within a housing via a first avoidance opening, with a bonding member securing it in place, allowing the pole to be connected externally, and a conductive member connecting to a circuit board on a separate surface, reducing the overall thickness impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the pole is mounted on the same side as the circuit board, then the connection is simplified, but the cell thickness increases
Solution Approach 1:
The pole transitions from a surface-mounted configuration to a through-hole configuration, passing through the housing from one side to the other. This dimensional change allows the pole to be positioned in the thickness direction rather than occupying surface area, thereby reducing cell thickness while maintaining connection functionality.
Solution Approach 2:
The pole is nested within the housing structure by passing through the avoidance opening, with the bonding member positioned within the housing to secure the pole. This nesting arrangement integrates the pole into the housing volume rather than adding external thickness.
2Reliability
If the pole size is increased, then the connection reliability is improved, but the cell thickness increases
Solution Approach 1:
The bonding member acts as an intermediary element that provides reliable mechanical bonding between the pole and the housing. This intermediary component ensures strong connection without requiring the pole itself to be oversized, as the bonding member handles the load transfer and securement function.
3Device complexity
If the circuit board is placed on the first surface, then the wiring is simplified, but the battery thickness increases
Solution Approach 1:
The circuit board is repositioned from the first surface to the second surface, utilizing the opposite face of the housing. This spatial redistribution in the thickness direction allows both the pole and circuit board to coexist without overlapping in the same plane, reducing overall battery thickness while maintaining simplified wiring connections.
Data Source
AI summary
A battery includes a cell, the cell includes a housing, an electrode assembly, a pole, and a bonding member, and the electrode assembly is accommodated in the housing. The housing includes a first surface in a thickness direction of the battery, and the housing is provided with a first avoidance opening running through the first surface along the thickness direction of the battery. The pole is disposed at the first avoidance opening, the bonding member is disposed between the pole and the housing, and the bonding member is configured to bond the pole to the housing. In this way, the pole may be at least partially disposed in the housing, and the pole may be connected to the outside via the first avoidance opening.