Dual-Lithium Battery Self-Heating via Internal Heat
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Solution Overview
Problem
Lithium-ion secondary batteries face challenges in maintaining stable charge and discharge characteristics at low and high temperatures without an external heat source, leading to increased costs and risks of malfunction.
Innovation Solution
A storage battery design featuring two lithium-ion secondary batteries with different temperature ranges, where one battery uses an ionic liquid or solid-state electrolyte for low temperatures and the other uses an organic electrolyte, with a temperature sensor and control circuit to heat the second battery using heat generated by the first, eliminating the need for an external heat source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heater is provided around the secondary battery to maintain temperature in low temperature environments, then the charge and discharge characteristics are improved, but the cost increases and the risk of malfunction increases
Solution Approach 1:
The invention utilizes the heat generated during normal charging and discharging operations of the secondary battery to maintain its own operating temperature. The battery serves itself by using its operational byproduct (heat) to prevent low-temperature performance degradation, eliminating the need for external heating devices and reducing system complexity.
Solution Approach 2:
The invention converts the heat that would normally be dissipated as waste during charging and discharging into a useful resource for maintaining battery temperature. By capturing and utilizing this otherwise wasted thermal energy, the system improves its own performance in cold environments without requiring additional active heating components.
2Reliability
If an external heat source is used to control battery temperature, then stable operation at low temperatures is achieved, but the cost increases
Solution Approach 1:
The secondary battery uses its own operational heat to maintain stable operation, making the system self-sufficient and eliminating the need for externally powered heating devices. This self-heating approach reduces manufacturing costs by removing additional components while maintaining reliable operation in low-temperature environments.
3Temperature
If an external heat source is provided, then temperature control is achieved, but the risk of malfunction increases
Solution Approach 1:
By using internally generated heat rather than external heating devices, the invention eliminates additional failure points associated with heaters and temperature control systems. The battery's own operational heat becomes the temperature control mechanism, reducing component count and potential sources of malfunction.
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
Enables stable operation across a wide temperature range, reducing costs and malfunctions by utilizing internal heat for temperature control, enhancing safety and efficiency.
Implementation Method 1
heat generated by charging and discharging of the secondary battery that can be charged and discharged at low temperatures
Data Source
AI summary
A storage battery that is less likely to be affected by the ambient temperature is provided. A storage battery that can be charged and discharged at low temperatures is provided. In the storage battery, a secondary battery that can be charged and discharged at low temperatures is provided adjacent to a general secondary battery. The storage battery having such a structure can use, as an internal heat source in a low temperature environment, heat generated by charging and discharging of the secondary battery that can be charged and discharged at low temperatures. Specifically, the storage battery includes a first lithium-ion secondary battery and a second lithium-ion secondary battery adjacent to each other. The first lithium-ion secondary battery contains at least one of an ionic liquid, a molecular crystalline electrolyte, a semi-solid-state electrolyte, an all-solid-state electrolyte, and lithium titanate. The second lithium-ion secondary battery contains an organic electrolyte solution.