Battery Pack Humidity Equalization to Prevent Condensation
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Solution Overview
Problem
The existing technologies fail to effectively regulate the humidity and pressure within a battery pack of vehicles, leading to water condensation, reduced insulation resistance, and accelerated damage to the battery module and pack, due to differences in air states between the inside and outside of the pack.
Innovation Solution
A vehicle configuration that includes an air conditioning system, a pressure regulator, communication members, and a controller to regulate the humidity and pressure within the battery pack to match the outside air conditions, using a control chamber to manage air flow and pressure, ensuring the pack humidity is equal to or lower than outside humidity and pressure is equal to outside pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery pack is air-tightly sealed to protect the battery module, then the reliability of the battery module is improved, but water condensation occurs inside the pack due to humidity differences, reducing insulation resistance and accelerating damage
Solution Approach 1:
The patent introduces a communication member as an intermediary component that fluidly connects the air conditioning system to the battery pack interior. This mediator enables controlled air exchange between the sealed battery pack and the external environment, allowing humidity and pressure regulation without compromising the seal integrity. The communication member resolves the contradiction by providing a controlled interface that prevents harmful condensation while maintaining protective sealing.
Solution Approach 2:
The patent applies parameter changes by using the air conditioning system to actively regulate the humidity and pressure parameters within the battery pack. The controller monitors and adjusts these parameters to match external conditions, preventing the humidity differential that causes condensation. This dynamic parameter adjustment maintains the sealed environment's protective function while eliminating the harmful condensation effect.
2Reliability
If the battery pack is air-tightly sealed, then the reliability is improved, but stress on seal members increases due to pressure differences, accelerating damage
Solution Approach 1:
The communication member serves as a pressure equalization intermediary, allowing the battery pack interior to communicate with the external environment. This enables pressure differential regulation that prevents excessive stress accumulation on seal members while maintaining the protective sealed structure. The mediator provides a controlled pressure release mechanism that preserves seal integrity.
Solution Approach 2:
The patent implements beforehand cushioning by proactively regulating pressure within the battery pack to prevent excessive stress buildup on seal members. The controller anticipates and mitigates potential damage by maintaining pressure equilibrium, cushioning the seal members from harmful stress before it can cause acceleration of damage.
3Reliability
If air-tight sealing is implemented, then protection of the battery module is improved, but the state of air inside the pack differs from outside air, causing condensation and damage
Solution Approach 1:
The communication member acts as a mediator that enables controlled air state equilibrium between the sealed battery pack interior and the external environment. It allows the composition and state of air to harmonize while maintaining the protective seal, resolving the contradiction between sealing and air state consistency.
Solution Approach 2:
The patent applies equipotentiality by equalizing the air state parameters (humidity and pressure) inside the battery pack with those outside. The air conditioning system adjusts internal conditions to match external conditions, creating equipotential air states that eliminate the driving force for condensation and damage while preserving the sealed protective structure.
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 prevents water condensation and reduces stress on the seal members, thereby extending the life of the battery module and pack by maintaining optimal air conditions within the battery pack.
Implementation Method 1
The air conditioning system is configured to regulate humidity of air and send the air
Implementation Method 2
The pressure regulator is configured to change pressure of air that passes through the communication member
Implementation Method 3
The controller is configured to control the air conditioning system and the pressure regulator such that the pressure in the battery pack is equal to the pressure of the outside air
Data Source
AI summary
A vehicle includes a battery pack, an air conditioning system, a communication member, a pack humidity detector, an outside air humidity detector, and a controller. The battery pack contains a battery module. The air conditioning system is configured to regulate humidity of air and send the air. The communication member fluidly connects a blowing port of the air conditioning system and an inside of the battery pack. The pack humidity detector is configured to detect humidity in the inside of the battery pack. The outside air humidity detector is configured to detect humidity of an outside air. The controller is configured to control the air conditioning system so that the humidity in the battery pack is equal to or lower than the humidity of the outside air.