Dry Bipolar Battery Assembly Storage After Electrolyte Draining
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Solution Overview
Problem
Bipolar battery assemblies with liquid electrolytes face issues such as self-discharging, capacity drop, swelling, cracking, and short circuiting when stored, especially in high temperatures, leading to reduced lifespan and storage challenges.
Innovation Solution
A method for preparing bipolar battery assemblies involving filling with a liquid electrolyte, optionally pickling, forming by applying an electric charge, draining and drying using channels and troughs for quick fluid distribution and evacuation, and temporarily storing before refilling with electrolyte.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bipolar battery assembly is stored with liquid electrolyte, then it is ready for immediate use, but it experiences self-discharging, capacity drop, swelling, cracking, and short circuiting leading to reduced lifespan
Solution Approach 1:
The patent removes the liquid electrolyte from the battery assembly during storage by draining it through channels and drying the assembly. This extraction of the harmful liquid component prevents self-discharging, swelling, and cracking while allowing the battery to be reconstituted later by refilling with fresh electrolyte
Solution Approach 2:
The patent performs draining and drying operations before storage to prepare the battery assembly in a stable dry state. This preliminary removal of electrolyte prevents the harmful effects of liquid storage while maintaining the battery's readiness for future activation through refilling
2Duration of action of stationary object
If a bipolar battery assembly is drained and dried for storage, then shelf life is extended, but additional processing steps and channels are required
Solution Approach 1:
The patent divides the battery assembly into functional segments by incorporating separate draining channels and troughs that allow selective removal of electrolyte. This segmentation enables the draining and drying functions while maintaining a modular structure that integrates these features into the overall battery design
Solution Approach 2:
The channels and troughs incorporated in the battery assembly serve multiple functions: they facilitate draining of electrolyte during storage preparation, enable refilling during reconstitution, and maintain structural integrity. This multi-functionality reduces the need for separate dedicated components
3Loss of time
If a bipolar battery assembly uses quick draining channels, then drying time is reduced, but the assembly structure becomes more complex
Solution Approach 1:
The patent incorporates three-dimensional networks of channels and troughs that provide multiple pathways for rapid electrolyte removal. This dimensional approach to fluid evacuation significantly reduces drying time while integrating the complexity into the internal geometry rather than adding external components
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 method allows for the storage of dry battery assemblies, extending their shelf life by preventing self-discharging and other issues associated with liquid electrolyte storage, while enabling efficient draining and drying processes.
Implementation Method 1
The electrolyte allows electrons and ions to flow between the cathode and anode material of the electrode plates
Implementation Method 2
drying the battery assembly of the one or more fluids
Data Source
AI summary
A method for preparing a battery assembly including: a) filling the battery assembly with a liquid electrolyte having one or more reactants therein; b) optionally, pickling the battery assembly; c) forming the battery assembly by applying an electric charge; d) draining the battery assembly of the liquid electrolyte with one or more fluids; e) drying the battery assembly of the one or more fluids; f) temporarily storing the battery assembly after draining and drying; and g) refilling the battery assembly with the liquid electrolyte after the temporarily storing.