Battery Pack Cooling Nozzle Layout to Prevent Internal Leaks
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Solution Overview
Problem
Existing battery packs in new energy vehicles face issues with loose connections and leaks in liquid cooling systems due to numerous pipes and quick connectors, leading to potential short circuits and safety hazards.
Innovation Solution
A battery pack design with liquid inlet and outlet nozzles penetrating through a bottom guard plate, connected to external pipes with quick connectors, eliminating internal connections and allowing quick replacement of faulty connectors without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple liquid cooling plates with nylon pipes and quick connectors are used for heat dissipation, then cooling efficiency is improved, but the risk of leakage and short circuit increases due to loose connections and seal failures in vibration environments
Solution Approach 1:
The patent merges the liquid cooling plate with the battery box structure, integrating the cooling function directly into the box walls. This eliminates the need for separate nylon pipes and quick connectors inside the battery pack, thereby removing leakage risks while maintaining cooling efficiency through direct thermal contact between the cooling plate and battery cells.
Solution Approach 2:
The patent extracts the quick connectors from the internal structure of the battery pack and relocates them to the external box structure. The liquid cooling plates remain integrated with the box, and only the external connectors are accessible from outside, eliminating internal leakage risks while preserving external serviceability for maintenance.
2Area of stationary object
If numerous pipes and quick connectors are used to connect liquid cooling plates, then cooling coverage is improved, but the complexity of the system increases and maintenance becomes difficult
Solution Approach 1:
The patent combines the liquid cooling plates with the battery box structure, where the box walls themselves serve as cooling channels. This integration reduces the number of separate components (pipes, connectors, mounting brackets) while maintaining comprehensive cooling coverage across all battery cells through the box's structural design.
Solution Approach 2:
The battery box serves multiple functions: it provides structural support, housing for battery cells, and integrated liquid cooling system. The box walls double as cooling channels, eliminating the need for separate piping systems and reducing overall system complexity while maintaining full cooling coverage.
3Reliability
If quick connectors are located inside the battery pack, then connection stability is improved, but replacement and maintenance require complete disassembly of the battery pack
Solution Approach 1:
The patent extracts the quick connectors from the internal battery pack structure and relocates them to the external box structure. This allows connectors to be accessed, inspected, and replaced from outside the battery pack without requiring disassembly of the entire unit, while the integrated cooling plate design maintains connection stability.
Solution Approach 2:
The patent designs the box structure with pre-integrated cooling plates and externally accessible connectors, preparing the system in advance for easy maintenance. The connectors are positioned outside the battery pack from the design stage, enabling quick replacement without disassembly, while the integrated structure ensures stable connections during operation.
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
Prevents internal leaks and enhances safety by containing leaks outside the pack, improving service life and reducing after-sales costs through external connector replacement.
Implementation Method 1
a liquid cooling plate (22) attached to the cell (21)... the body (221) is provided with a flow channel (225) extending in the length direction and disposed inside the body (221)
Implementation Method 2
the flow channel (225) extends from one end of the body (221) in the length direction to the other end... to cool the cell (21)
Data Source
Figure 1
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Figure 4
AI summary
The invention provides a battery pack and a powered device. The battery pack includes a box, a cell, a liquid cooling plate attached to the cell, a liquid inlet pipe, and a liquid outlet pipe. A bottom guard plate is disposed at the bottom of the box. The cell and the liquid cooling plate are both disposed in the box. A liquid inlet nozzle and a liquid outlet nozzle are disposed in the liquid cooling plate and penetrate the bottom guard plate to the outside of the box. The liquid inlet pipe and the liquid outlet pipe are disposed outside the box. A first quick connector is disposed in the liquid inlet pipe. A second quick connector is disposed in the liquid outlet pipe. The first quick connector is connected to the liquid inlet nozzle. The second quick connector is connected to the liquid outlet nozzle.