Battery Pack Moisture Absorbing Area for Condensation Control
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Solution Overview
Problem
Li-ion battery packs face failure due to moisture condensation and cooling liquid leakage within the battery box, leading to safety risks and operational malfunctions, particularly in varying temperature environments.
Innovation Solution
A battery pack design featuring a battery box with a liquid cooling pipe, moisture-absorbing areas, a flow converging plate, an air pressure balance valve with multi-hole ventilating and moisture-absorbing sheets, and an accumulated liquid absorbing area to manage humidity and prevent condensation and leakage, ensuring the reliability of the battery system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If evaporator or cooling plate is arranged in the airtight interior of the battery box for thermal management, then battery temperature control is improved, but moisture condensation occurs on the surface causing system failure
Solution Approach 1:
A moisture absorbing layer is introduced as an intermediary component between the cooling plate and the battery box interior. This layer absorbs condensation water that forms on the cooling plate surface, preventing it from flowing into electronic components while maintaining the thermal management function. The moisture absorbing layer acts as a mediator that resolves the conflict between temperature control and system reliability.
Solution Approach 2:
The harmful condensation water is extracted from the problem by using the moisture absorbing layer to capture and retain it at the source (on the cooling plate surface). Instead of allowing the condensation to flow freely into the battery box and cause short circuits, the water is taken out of the harmful path and held in the moisture absorbing material.
2Temperature
If air heating is used to warm the battery pack in low-temperature environment, then battery temperature is improved, but hot air meets cold condensate water causing short circuit
Solution Approach 1:
The moisture absorbing layer is pre-positioned on the cooling plate surface before any condensation or heating occurs. This preliminary placement ensures that when condensation forms or hot air is introduced during heating operations, the moisture absorbing layer is already in position to capture the water, preventing it from flowing into electronic components and causing short circuits.
Solution Approach 2:
The condensation water that would normally be harmful (causing short circuits) is converted into a contained substance by the moisture absorbing layer. The layer transforms the harmful flowing water into a retained substance within its structure, converting a potential failure mode into a controlled situation that protects the electronic components.
3Temperature
If cooling liquid is used for thermal management, then heat dissipation is improved, but leakage of cooling liquid may occur causing system failure
Solution Approach 1:
The moisture absorbing layer serves as an intermediary protective barrier between the cooling liquid and the battery box interior. In case of cooling liquid leakage, the layer absorbs and contains the liquid, preventing it from reaching electronic components and causing failure. This intermediary layer adds a safety buffer that maintains system reliability even when thermal management is active.
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 solution effectively controls air humidity and aggregates condensation and cooling liquid, reducing the risk of battery system failure and ensuring the reliability of electric components by utilizing a passive moisture-removing function and integrated moisture-absorbing structures.
Implementation Method 1
a moisture absorbing area is arranged inside the battery box, the moisture absorbing area is configured to absorb inner moisture of the battery box
Implementation Method 2
a liquid cooling pipe are arranged inside the battery box, the liquid cooling pipe is arranged at bottom of the battery module
Implementation Method 3
an accumulated liquid absorbing area is arranged in the battery box, the accumulated liquid absorbing area is arranged at bottom of the flow converging plate, liquid and moisture absorbing material adopted in the accumulated liquid absorbing area has certain saturability, the accumulated liquid absorbing area and the flow converging plate cooperate to aggregate condensation water and the cooling liquid leaked from the liquid cooling pipe
Data Source
AI summary
The present application relates to the field of battery technologies and, particularly, relates to a battery pack, which includes a battery box, a battery module and a liquid cooling pipe are arranged inside the battery box and the liquid cooling pipe is arranged at bottom of the battery module, a moisture absorbing area is arranged inside the battery box and the moisture absorbing area is configured to absorb inner moisture of the battery box. The present application has the following beneficial effects: the battery box of the present application adopts a passive moisture-removing function and achieves controlling of the air humidity in the battery box, thereby guaranteeing the reliability of the battery system, and reducing the risk of failure of the electric components.