Battery Lower Plastic Assembly for Even Electrolyte Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Energy-storage devices face issues with uneven electrolyte distribution and gas accumulation due to differential decomposition rates of electrolytes during cyclic charging and discharging, leading to reduced performance and lifespan.
Innovation Solution
The energy-storage device incorporates a lower plastic assembly with reflux tanks and distribution channels of varying flow capacities to redistribute electrolyte and gas, ensuring even distribution and preventing accumulation, thereby maintaining electrolyte balance and extending device lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the energy-storage device is charged and discharged cyclically or stored for a long time, then the electrochemical reaction converts chemical energy into electrical energy, but the electrolyte gradually decomposes and produces gas leading to uneven electrolyte distribution
Solution Approach 1:
The distribution member is divided into multiple channels (first distribution channel, second distribution channel, third distribution channel) with different flow capacities. Each channel independently distributes electrolyte to different regions of the electrode assembly, preventing uneven distribution and gas accumulation during long-term storage and cycling.
Solution Approach 2:
Different channels are designed with different fluid flow capacities to match the local decomposition characteristics of the electrolyte. Channels closer to the middle portion of the electrode assembly have different flow characteristics than those serving side portions, optimizing electrolyte distribution according to local needs.
2Productivity
If the electrolyte decomposes during cyclic charging and discharging, then chemical energy is converted into electrical energy, but gas accumulates and reduces device performance
Solution Approach 1:
The reflux tank collects gas and excess electrolyte from the accommodating cavity, separating the harmful gas phase from the functional electrolyte. The distribution member then redistributes the purified electrolyte back to the electrode assembly, eliminating gas accumulation while maintaining continuous energy conversion.
Solution Approach 2:
The distribution member acts as an intermediary system between the reflux tank and the electrode assembly. It receives processed electrolyte from the reflux tank and distributes it to various regions of the electrode assembly, mediating the removal of decomposition products while maintaining productive electrochemical reactions.
3Device complexity
If the distribution channels have uniform flow capacity, then the structure is simple, but the electrolyte distribution remains uneven due to differential decomposition rates
Solution Approach 1:
The distribution channels are designed with asymmetric flow capacities - the first distribution channel has different fluid flow characteristics than the second and third channels. This asymmetric design compensates for the differential decomposition rates occurring at different locations of the electrode assembly, achieving uniform electrolyte distribution.
Solution Approach 2:
The fluid flow capacity parameter of different distribution channels is deliberately changed to match the local decomposition characteristics. By adjusting the flow capacity of each channel, the system optimizes electrolyte distribution according to the varying decomposition rates across the electrode assembly.
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 solution achieves even electrolyte distribution and prevents gas accumulation, enhancing the energy-storage device's performance and longevity by addressing the differential decomposition rates of electrolytes.
Implementation Method 1
Each of the distribution members is provided with a reflux tank in communication with the accommodating cavity, and the reflux tank is configured to collect fluid flowing out from the accommodating cavity and distribute the fluid into the accommodating cavity to immerse the electrode assembly. Each reflux tank defines a first distribution channel and a second distribution channel in a length direction of the lower plastic assembly, the first distribution channel is located between the second distribution channel and a central axis of the lower plastic assembly, and fluid flow capacity of the first distribution channel is greater than fluid flow capacity of the second distribution channel.
Implementation Method 2
An electrochemical reaction can occur between the electrode assembly and the electrolyte to covert chemical energy into electrical energy, so that the energy-storage device can output electric energy.
Implementation Method 3
the reflux tank is configured to collect fluid flowing out from the accommodating cavity and distribute the fluid into the accommodating cavity to immerse the electrode assembly
Data Source
AI summary
The present disclosure provides an energy-storage device and an electricity-consumption device. The energy-storage device includes a housing, an electrode assembly, an end cap assembly, and a lower plastic assembly. The housing has an opening and is provided with an accommodating cavity in communication with the opening, and the accommodating cavity is configured to store fluid. The lower plastic assembly includes a cover plate and two distribution members connected to the cover plate. Each distribution member is provided with a reflux tank, and the reflux tank is configured to collect fluid flowing out from the accommodating cavity and distribute fluid into the accommodating cavity. Each reflux tank defines a first distribution channel and a second distribution channel in a length direction of the lower plastic assembly. Fluid flow capacity of the first distribution channel is greater than fluid flow capacity of the second distribution channel.