Battery Cell With Separate Lithium-Ion Source
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Solution Overview
Problem
Existing battery cell technologies face challenges in maintaining a constant lithium ion concentration over their lifespan, leading to reduced storage capacity and shorter cycle life due to the limited adjustability of electrolyte release rates and increased production costs associated with chelating agents and complex formation.
Innovation Solution
Incorporating a separate lithium-ion source within the battery cell's shell, in direct contact with the electrolyte, which continuously replenishes lithium ions through leaching, maintaining a stable lithium ion concentration and extending the battery's cycle life by using a solid matrix with controlled lithium ion release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a separate lithium-ion source is arranged inside the shell in direct contact with the electrolyte, then the service life and storage capacity consistency are improved, but the device complexity increases
Solution Approach 1:
The lithium-ion source is nested inside the shell of the battery cell, integrated within the existing structure. This allows the replenishment function to be incorporated without adding external components, thereby improving service life while minimizing increases in device complexity.
Solution Approach 2:
The lithium-ion source automatically replenishes lithium ions into the electrolyte as needed during battery operation. This self-regulating mechanism maintains stable lithium ion concentration without requiring external intervention or complex control systems, extending service life while keeping the system simple.
2Stability of the object's composition
If a separate lithium-ion source is arranged inside the shell in direct contact with the electrolyte, then the storage capacity consistency is improved, but the manufacturing complexity increases
Solution Approach 1:
The lithium-ion source is designed with specific material composition and structural parameters that enable controlled lithium ion release. By optimizing these parameters, the system maintains consistent storage capacity over time while using manufacturable materials and structures that do not excessively complicate the production process.
3Adaptability or versatility
If electrolytes are kept in pre-manufactured capsules, then the electrolyte release can be controlled, but the manufacturing effort increases and release rate adjustability is limited
Solution Approach 1:
The invention extracts the electrolyte from pre-manufactured capsules and uses it directly in the battery cell. The lithium-ion source is then arranged in direct contact with the free electrolyte, eliminating capsule manufacturing steps and enabling more flexible adjustment of lithium ion release rates without being constrained by capsule design.
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 design allows for a prolonged storage of electrical energy over many cycles with a more consistent storage capacity, reducing wear and tear, and maintaining performance over a longer period compared to previous technologies.
Implementation Method 1
The lithium ions of the lithium ion source are therefore a supply of lithium ions separate from the electrolyte. If lithium ions in the electrolyte are used up during operation, they can be continuously replaced with lithium ions that are transferred from the supply of the lithium ion source into the electrolyte. This transfer of the lithium ions from the lithium ion source to the electrolyte takes place, for example, by washing out or leaching out the lithium ions from the lithium ion source.
Data Source
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Figure 5~6
AI summary
The present invention relates to a battery cell (1) with a cell stack (5) comprising at least one anode (6), one cathode (8), an intermediate separator (7), and an electrolyte (9), which are together enclosed by a casing (2). The battery cell (1) is characterized in that at least one separate lithium-ion source (17) is arranged within the casing (2) and is in direct contact with the electrolyte (9).