Battery Cooling Plate Layout With External Coolant Piping Isolation
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Solution Overview
Problem
Existing power battery systems in hybrid and electric vehicles face safety risks due to coolant leakage in liquid cooling systems, which can lead to short circuits, fires, or explosions, and inefficiencies in heat transfer.
Innovation Solution
A cooling device with an external piping system is designed, where the liquid cooling plates are arranged in a chamber with a separate region for the piping system, ensuring that high-voltage devices inside the battery system remain unaffected by coolant leaks and allowing for flexible flow distribution to reduce temperature differences and prolong battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid cooling system is used, then heat transfer efficiency is improved, but safety risk increases due to coolant leakage
Solution Approach 1:
The cooling device is divided into two sealingly separated regions: a first region containing the liquid cooling plate assembly and a second region containing the piping system. This segmentation isolates the high-voltage battery components from the coolant piping, allowing liquid cooling to maintain high heat transfer efficiency while preventing coolant leakage from causing safety hazards to the battery system.
Solution Approach 2:
The piping system is extracted from the first region and placed in a separate second region that is sealingly separated from it. This extraction removes the source of potential coolant leakage away from the high-voltage battery components, eliminating the safety risk while preserving the liquid cooling functionality in the first region.
2Productivity
If piping system is integrated with battery system, then cooling coverage is improved, but complexity of system increases
Solution Approach 1:
The cooling device is segmented into two distinct regions: the first region with the liquid cooling plate assembly directly contacting the battery for optimal cooling coverage, and the second region with the piping system separated away. This segmentation allows the cooling plates to be optimally positioned for heat dissipation while the piping complexity is isolated in a separate region, reducing overall system complexity.
3Productivity
If coolant piping is placed inside battery system, then cooling efficiency is improved, but risk of short circuit increases
Solution Approach 1:
The piping system is extracted from the first region where high-voltage battery components are located and placed in a sealingly separated second region. This extraction removes the potential source of coolant leakage away from the electrical components, eliminating the short circuit risk while the liquid cooling plate assembly in the first region maintains high cooling efficiency through direct thermal contact with the battery.
Solution Approach 2:
A sealing wall acts as an intermediary barrier between the first region containing the liquid cooling plate assembly and the second region containing the piping system. This intermediary structure allows the cooling system to function effectively while preventing coolant from the piping system from reaching the high-voltage battery components, thus eliminating short circuit risk.
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 design enhances safety by isolating internal components from coolant leakage, improves battery performance, and reduces the risk of failure and costs associated with complex piping, while maintaining efficient heat dissipation.
Implementation Method 1
liquid cooling plate assembly extends from a bottom of the first region to a bottom of the second region, and the piping system is in fluid communication with a flow passage of the liquid cooling plate assembly
Implementation Method 2
piping system for coolant communication... in fluid communication with a flow passage of the liquid cooling plate assembly
Data Source
AI summary
The present disclosure relates to a cooling device for a power battery system, a power battery system for a vehicle comprising the cooling device, and a vehicle. The cooling device is disposed at a bottom of the power battery system and includes a chamber defined by a casing. The chamber includes: a first region where a liquid cooling plate assembly is disposed; and a second region sealingly separated from the first region and accommodating a piping system for coolant communication. The liquid cooling plate assembly extends from a bottom of the first region to a bottom of the second region, and the piping system is in fluid communication with a flow passage of the liquid cooling plate assembly. In the cooling device of the present disclosure, the piping system is all disposed outside the battery system. Thus, battery cells or high-voltage devices inside the battery system would not be affected even if the coolant leaks at the piping system, which greatly improves safety of the battery system.