Embedded Induction Coil for Wireless Battery Charging and Heating
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Solution Overview
Problem
Lithium-ion batteries face challenges with high polarization and reduced dynamics performance at low temperatures, leading to potential lithium separation, short circuits, and decreased output power due to the inherent attributes of lithium-ion batteries, which affects charging and discharging efficiency.
Innovation Solution
Embedding an induction coil within the battery electrode plate allows for wireless charging and heating, reducing the battery's thickness and improving performance by using the induction coil as both a charging and heating element, thereby enhancing charging and discharging efficiency at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the induction coil is disposed outside the battery housing or between the housing and electrode plate, then wireless charging can be implemented, but the thickness of the wireless rechargeable battery is greatly increased
Solution Approach 1:
The induction coil is embedded within the electrode plate structure, with the coil winding integrated into the current collector layers. This nesting approach allows the wireless charging functionality to be incorporated without adding external components, thus maintaining a compact battery thickness while enabling wireless charging capability.
Solution Approach 2:
The induction coil is arranged in a planar configuration within the electrode plate, utilizing the two-dimensional space of the current collector. By transforming the traditional three-dimensional external coil arrangement into a two-dimensional planar embedding, the design achieves wireless charging functionality without increasing the battery's thickness dimension.
2Reliability
If a separate heating piece is disposed between the positive and negative electrodes, then low temperature performance can be improved, but the battery thickness is greatly increased
Solution Approach 1:
The induction coil serves dual functions: it acts as both the wireless charging induction element and the heating component for low temperature performance improvement. By making the induction coil multi-functional, the design eliminates the need for a separate heating piece, thus maintaining compact battery thickness while achieving both wireless charging and low temperature operation capabilities.
Solution Approach 2:
The heating function is merged with the induction coil structure. The same coil that receives electromagnetic energy for wireless charging also generates heat through resistive heating when current passes through it, thereby improving low temperature performance without requiring additional heating components that would increase battery thickness.
3Length of stationary object
If the induction coil is embedded in the current collector with exposed surface, then wireless charging and heating can be implemented with reduced thickness, but the manufacturing complexity increases
Solution Approach 1:
The electrode plate is segmented into multiple current collector layers, with the induction coil embedded within this layered structure. This segmentation allows the coil to be integrated into the electrode manufacturing process itself, where the coil can be placed between current collector sheets during assembly, thereby reducing the need for complex post-assembly integration steps.
Solution Approach 2:
The induction coil is prepared and positioned in advance during the electrode plate manufacturing process, before the final assembly of the battery. By performing preliminary embedding of the coil into the current collector structure during electrode fabrication, the design simplifies subsequent assembly steps and reduces overall manufacturing complexity despite the integrated structure.
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
The embedded induction coil enables efficient wireless charging and heating, reducing the risk of lithium separation and improving the battery's performance at low temperatures, ensuring stable operation and preventing issues like short circuits and decreased output power.
Implementation Method 1
A principle of the electromagnetic induction charging technology is as follows: A coil is disposed at each of a transmit end and a receive end. The coil at the transmit end is connected to a wired power supply, and generates electromagnetic energy through an electromagnetic phenomenon. The coil at the receive end induces the electromagnetic energy generated by the transmit end, and charges a rechargeable battery by using a current generated through electromagnetic induction.
Implementation Method 2
The coil at the receive end induces the electromagnetic energy generated by the transmit end, and charges a rechargeable battery by using a current generated through electromagnetic induction.
Implementation Method 3
the induction coil can implement wireless charging, heat a wireless rechargeable battery in which the battery electrode plate is located
Data Source
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AI summary
Embodiments of the present invention disclose a battery electrode plate and a preparation method thereof, a wireless rechargeable battery, a battery management method and system, and a controller. The battery electrode plate includes a current collector and an induction coil. The induction coil is a planar coil formed by winding a first conducting wire wrapped by an insulation film, at least a part of the induction coil is embedded in the current collector, a first surface of the induction coil is exposed on a second surface of the current collector, and the first surface is a surface that is of the induction coil and that is parallel to a plane where the induction coil is located. In the embodiments of the present invention, the conduction col is disposed inside the battery electrode plate, so that the induction coil can implement wireless charging, heat a wireless rechargeable battery in which the battery electrode plate is located, and greatly reduce thickness of the wireless rechargeable battery.