Battery Cell Heat Exchange Pipe for Internal Temperature Control
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Solution Overview
Problem
Ordinary batteries experience poor heat exchange, leading to reduced charge-discharge efficiency and reliability due to internal temperature fluctuations, whether from high heat accumulation or extreme cold exposure.
Innovation Solution
Incorporating a heat exchange pipe that penetrates through the cell, allowing contact with the battery cell assembly and facilitating heat exchange with external fluids to manage temperature effectively, thereby maintaining efficiency and reliability across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a housing wraps the battery cell assembly for heat exchange, then the battery structure is simple, but the heat exchange effect is poor
Solution Approach 1:
A heat exchange pipe is introduced as an intermediary component between the battery cell assembly and the external environment. The pipe penetrates through the end covers and contains a heat exchange medium that facilitates thermal energy transfer, effectively mediating the heat exchange process between the battery interior and exterior.
Solution Approach 2:
The heat exchange approach transitions from a two-dimensional surface contact (housing wrapping) to a three-dimensional penetrative structure. The heat exchange pipe passes through the end covers and makes contact with the battery cell assembly at multiple points, creating thermal exchange pathways in the depth dimension.
2Productivity
If internal temperature of battery is too high, then charge-discharge efficiency improves, but reliability drops due to heat accumulation
Solution Approach 1:
The heat exchange pipe system provides continuous thermal feedback between the battery interior and exterior environments. By maintaining a temperature gradient between the heat exchange medium and the battery cell assembly, the system actively regulates temperature, preventing excessive heat accumulation that would compromise reliability while preserving operational efficiency.
Solution Approach 2:
The system dynamically adjusts thermal parameters by controlling the flow and temperature of the heat exchange medium through the pipe. This allows optimization of the temperature field distribution within the battery, maintaining parameters within the optimal range for both efficiency and reliability.
3Use of energy by moving object
If battery is exposed to extremely cold environment, then energy utilization efficiency improves, but reliability drops due to low internal temperature
Solution Approach 1:
The heat exchange pipe acts as a thermal mediator that can introduce warmth from the external environment into the battery during cold conditions. The heat exchange medium circulating through the pipe transfers thermal energy to the battery cell assembly, preventing temperature-induced reliability issues while maintaining energy utilization efficiency.
4Temperature
If heat exchange pipe penetrates through the cell and contacts battery cell assembly, then heat exchange effectiveness improves, but device complexity increases
Solution Approach 1:
The heat exchange pipe serves multiple functions simultaneously: it provides thermal exchange pathways, structurally connects with the end covers, and can be integrated with existing battery components. This multi-functionality justifies the additional structural elements by providing comprehensive thermal management capabilities.
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 heat exchange pipe effectively manages temperature by removing excess heat in high-temperature conditions and rapidly warming in cold conditions, enhancing energy utilization efficiency and reliability of the battery.
Implementation Method 1
a heat exchange pipe passing through the first end cover, the second end cover, and the accommodating space, and an outer wall of the heat exchange pipe being in contact with the battery cell assembly
Data Source
AI summary
A cell and a battery are disclosed. The cell includes: a barrel, a first end cover and a second end cover being arranged at two ends of the barrel respectively, the barrel, the first end cover and the second end cover defining an accommodating space in which a battery cell assembly is arranged; and a heat exchange pipe passing through the first end cover, the second end cover, and the accommodating space, and an outer wall of the heat exchange pipe being in contact with the battery cell assembly. The battery includes at least two cells, the heat exchange pipes of the adjacent cells communicate with each other, so that external fluid can enter the heat exchange pipe at one end of the battery pack and then exchange heat with all the cells.