Battery Cell Block Cooling Channel for Uniform Temperature Control
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Solution Overview
Problem
Existing temperature control devices for electrical energy storage cell blocks often result in uneven cooling, leading to poor usage of thermal storage capacity and reduced output due to hot and cold spots, as cells at the coolant inlet are cold while those at the outlet are warm, limiting continuous performance.
Innovation Solution
A temperature control device with a temperature control channel that tapers from one battery cell to a predetermined section and then widens, ensuring uniform temperature distribution across multiple battery cells by adjusting the cross-section in the flow direction, allowing for efficient cooling and heating of the cell block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling plate with a cooling device is formed on the underside of a cell block, then thermal energy can be released into the cooling fluid, but uneven cooling occurs with cells at the coolant inlet being cold and cells at the coolant outlet being warm
Solution Approach 1:
The patent applies local quality by varying the cross-sectional area of the cooling channel along the flow direction. The channel has a smaller cross-section at the inlet side and a larger cross-section at the outlet side, creating different cooling intensities in different regions. This local adjustment of cooling capacity matches the thermal distribution pattern of the battery cells, ensuring uniform temperature control across all cells.
2Ease of manufacture
If the temperature control channel has a constant cross-section, then the device structure is simple, but hot and cold spots occur leading to poor usage of thermal storage capacity
Solution Approach 1:
The patent implements parameter changes by modifying the cross-sectional area parameter of the cooling channel along the flow direction. The channel transitions from a smaller cross-section at the inlet to a larger cross-section at the outlet, creating a gradient that optimizes heat transfer. This parameter variation ensures that the cooling capacity is distributed appropriately throughout the cell block, maximizing thermal storage capacity usage while maintaining manufacturing feasibility.
3Temperature
If the temperature control channel tapers and widens in the flow direction, then uniform temperature distribution is achieved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by varying the cross-sectional area of the cooling channel along the flow direction. The channel has a smaller cross-section at the inlet side and a larger cross-section at the outlet side, creating different cooling intensities in different regions. This local adjustment of cooling capacity matches the thermal distribution pattern of the battery cells, ensuring uniform temperature control across all cells.
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 solution enhances the uniformity of temperature distribution, maximizes the usage of thermal storage capacity, and increases the continuous output of the cell block by reducing hot and cold spots, thereby improving dissipation and reducing aging mechanisms.
Implementation Method 1
a cooling plate with a cooling device can be formed on an underside of a cell block, wherein the cooling device is cooled on the basis of a fluid and the thermal energy can thus be released into the cooling fluid
Implementation Method 2
the temperature control fluid is designed for directly controlling the temperature of the cell block
Data Source
AI summary
A temperature control device for controlling a temperature of a cell block of an electrical energy store. A temperature control fluid is guided in a temperature control channel for controlling the temperature of the cell block where the temperature control channel has a changing cross-section viewed in a direction of flow of the temperature control fluid and where a plurality of battery cells of the cell block are disposed next to each other at least in areas viewed in the direction of flow. The temperature control fluid directly controls the temperature of the cell block, the temperature control channel tapers in the direction of flow from a first battery cell of the plurality of battery cells to a predetermined section of the temperature control channel, and the temperature control channel widens after the predetermined section.