High Voltage Battery Submodule Elastic Coupling
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Solution Overview
Problem
High voltage battery cells, particularly the pouched type, are prone to damage from external forces, leading to electrolyte leakage and potential explosions due to their flexibility, and the welding coupling between electrode taps and voltage sensing modules results in contact defects during charging and discharging, causing stability issues and risk of fire.
Innovation Solution
A submodule design for high voltage batteries featuring elastically coupled electrode taps and voltage sensing modules, with bending portions and fastening holes, uses bolt coupling and hook coupling to prevent contact defects and secure connections, and frames with cooling channels to enhance durability and cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding coupling is used to connect electrode tap and voltage sensing module, then electrical connection is achieved, but contact defects occur during repeated expansion and contraction of battery cell
Solution Approach 1:
The patent replaces rigid welding coupling with elastic coupling that allows dynamic movement. The voltage sensing module is elastically coupled to the electrode tap, enabling the connection to flex during battery expansion and contraction cycles without breaking, thus maintaining contact reliability while accommodating dimensional changes.
Solution Approach 2:
The patent changes the coupling method from rigid welding to elastic coupling with adjustable parameters. The elastic coupling mechanism allows for controlled flexibility and movement range, adapting to the dimensional changes of the battery cell during charge-discharge cycles while maintaining stable electrical connection.
2Weight of moving object
If pouched type high voltage battery cell is used, then weight is reduced and manufacturing cost is lowered, but the cell becomes easily damaged by external force
Solution Approach 1:
The patent applies beforehand cushioning by providing protective frames surrounding the pouched type battery cells. These frames are positioned in advance to absorb and distribute external forces before they can damage the flexible battery cells, enabling the use of lightweight pouched cells while maintaining damage resistance.
Solution Approach 2:
The patent employs composite material structures combining the flexible pouched battery cells with rigid protective frames. This composite approach allows the lightweight battery cell to maintain its weight advantage while the frame structure provides the necessary mechanical strength and damage protection.
3Stability of the object's composition
If voltage sensing module is rigidly connected to electrode tap, then stable connection is achieved, but damage to connection causes contact defects and fire risk
Solution Approach 1:
The patent replaces rigid connection with dynamic elastic coupling that maintains stability through flexibility. The voltage sensing module is elastically coupled to the electrode tap, allowing the connection to move and flex during battery operation, maintaining stable electrical contact while reducing susceptibility to damage from external forces and dimensional changes.
Data Source
AI summary
A submodule for high voltage batteries, in which a voltage sensing module and an electrode tap of a high voltage battery cell are elastically coupled to each other, thereby protecting the high voltage battery cell from an external force and preventing a contact defect between the electrode tap and the voltage sensing module. A pair of fastening holes, allowing a pair of first bending portions to communicate with each other are also provided. The voltage sensing module includes a first sensing module bolt-fastened to the pair of fastening holes and electrically connected to the first electrode tap and a second sensing module disposed in a direction opposite to the first sensing module, fastened to the pair of second bending portions through hook coupling, and electrically connected to the second electrode tap.