Multi-Chemistry EV Battery Packs for Range and Fast Charging
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Solution Overview
Problem
Current electric vehicle battery systems rely on a single battery chemistry, which compromises on performance characteristics such as energy density, power density, charge rate, and recharging time, failing to meet the demands for extended driving range and efficient recharging.
Innovation Solution
Implementing a multiple chemistry battery system, where cells with different chemistries (e.g., lithium-ion and lithium-titanate) are used in conjunction, with controllers managing the connections between them to optimize energy and power delivery, allowing for series or parallel configurations based on load and charge state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single battery chemistry is used, then the system complexity is reduced, but the driving range and recharging performance are compromised
Solution Approach 1:
The battery system is divided into multiple independent battery packs, each containing cells with different chemistries (e.g., lithium-ion and lithium-titanate). This segmentation allows each chemistry to be optimized for specific functions while maintaining overall system manageability through modular architecture.
Solution Approach 2:
The patent employs a composite battery system combining multiple battery chemistries within a single system. Different chemistries are selected to complement each other's strengths, creating a composite system that achieves superior overall performance compared to single-chemistry systems.
2Ease of operation
If a single battery chemistry is used, then the manufacturing and operation are simplified, but the energy density and power density cannot be simultaneously optimized
Solution Approach 1:
Different regions of the battery system (different battery packs or modules) are assigned different chemistries based on local functional requirements. High power-density chemistries are placed where high current delivery is needed, while high energy-density chemistries are placed where energy storage is prioritized.
Solution Approach 2:
The system dynamically switches between different battery packs and chemistries based on real-time operational demands. The control system adjusts which batteries are active, how they are connected (series/parallel), and their operating parameters to optimize performance for current conditions.
3Quantity of substance
If high energy density batteries are used, then the driving range is extended, but the charge rate and recharging time are reduced
Solution Approach 1:
The battery system is divided into multiple independent battery packs, each containing cells with different chemistries (e.g., lithium-ion and lithium-titanate). This segmentation allows each chemistry to be optimized for specific functions while maintaining overall system manageability through modular architecture.
Solution Approach 2:
The patent employs a composite battery system combining multiple battery chemistries within a single system. Different chemistries are selected to complement each other's strengths, creating a composite system that achieves superior overall performance compared to single-chemistry systems.
4Productivity
If high power density batteries are used, then the charge rate is improved, but the energy density and driving range are compromised
Solution Approach 1:
Different regions of the battery system (different battery packs or modules) are assigned different chemistries based on local functional requirements. High power-density chemistries are placed where high current delivery is needed, while high energy-density chemistries are placed where energy storage is prioritized.
Solution Approach 2:
The system dynamically switches between different battery packs and chemistries based on real-time operational demands. The control system adjusts which batteries are active, how they are connected (series/parallel), and their operating parameters to optimize performance for current conditions.
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 approach enhances battery performance by providing a combination of high energy and power density, extending driving range and reducing recharging time, while allowing for flexible system optimization.
Implementation Method 1
a first battery including a first cell having a first chemistry, and a second battery including a second cell having a second chemistry different from the first chemistry
Data Source
AI summary
Multiple chemistry battery systems and methods for using such systems in electric vehicles are disclosed. In one embodiment, an example electric vehicle may include a drive motor configured to impart motion to one or more wheels of the electric vehicle, a plurality of batteries configured to power the drive motor, and one or more controllers. The plurality of batteries may include a first battery including a first cell having a first chemistry, and a second battery including a second cell having a second chemistry different from the first chemistry. The one or more controllers may be configured to cause the first battery and the second battery to power the drive motor, and to cause the drive motor to charge the first battery and the second battery.