Dual-Cavity Battery Thermal Management for Cooling and Heat Preservation
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Solution Overview
Problem
Existing thermal management systems for lithium-ion batteries in new energy vehicles fail to achieve a balance between heat dissipation and heat preservation, leading to performance degradation and safety risks due to temperature extremes.
Innovation Solution
A heat exchange apparatus with a housing and a spacer plate, separating the housing into two cavities, where one cavity is used for heat dissipation or heating with a heat exchange medium, and the other cavity can be switched between a ventilated state for heat exchange and a closed state for heat preservation, effectively isolating the battery from external temperature fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat dissipation is implemented for the battery, then battery temperature is reduced, but heat preservation capability deteriorates
Solution Approach 1:
The housing is divided into a first cavity for heat exchange and a second cavity for heat preservation, allowing independent operation of heat dissipation and heat preservation functions. The spacer plate further segments the first cavity into multiple regions, enabling differentiated thermal management for different battery areas.
Solution Approach 2:
The sealing elements can dynamically switch between open and closed states to control air flow in the second cavity. This dynamic adjustment allows the system to transition between heat dissipation mode (sealing elements closed) and heat preservation mode (sealing elements open), adapting to different thermal management requirements.
2Stability of the object's composition
If heat preservation is implemented for the battery, then temperature stability is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The dual-cavity structure separates heat preservation function (second cavity) from heat exchange function (first cavity), allowing the system to maintain temperature stability through the insulated second cavity while preserving heat dissipation capability via the first cavity's connection to the heat exchange device.
Solution Approach 2:
The controllable sealing elements enable dynamic switching between heat preservation mode (closed state for temperature stability) and heat dissipation mode (open state for heat dissipation capability), allowing the system to adapt to different operational requirements.
3Productivity
If the battery is exposed to external environment, then heat exchange efficiency is improved, but impact from external temperature extremes increases
Solution Approach 1:
The battery is divided into regions served by the first cavity (for heat exchange) and the second cavity (for protection from external extremes). The spacer plate creates additional segmentation, allowing different thermal strategies for different battery areas based on their specific needs.
Solution Approach 2:
The second cavity acts as an intermediary buffer zone between the battery and the external environment. When sealing elements are closed, this intermediate space protects the battery from external temperature extremes while the first cavity maintains heat exchange efficiency through its connection to the heat exchange device.
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 achieves a balance between heat exchange and heat preservation requirements, enhancing the performance and safety of lithium-ion batteries by maintaining optimal temperatures regardless of external conditions.
Implementation Method 1
An outer wall on a side that is of the first cavity and that is away from the second cavity may be configured to be in thermally conductive contact with a to-be-heat-exchanged element
Implementation Method 2
heat dissipation or heating may be implemented for the to-be-heat-exchanged element through circulation of a heat exchange medium in the first cavity
Implementation Method 3
in the closed state, the to-be-heat-exchanged element may be isolated from external air, to reduce impact of an external high temperature or low temperature on the to-be-heat-exchanged element, and achieve a heat preservation effect
Data Source
AI summary
A heat exchange apparatus, a heat exchange device, a thermal management system, a control method for a thermal management system, and a vehicle are provided, to implement a heat exchange or heat preservation requirement of a to-be-heat-exchanged element, and improve performance and use safety of the to-be-heat-exchanged element. The heat exchange apparatus includes a housing and a spacer plate disposed in the housing. The spacer plate separates the housing into a first cavity and a second cavity. An outer wall on a side that is of the first cavity and that is away from the second cavity is configured to be in thermally conductive contact with a to-be-heat-exchanged element. The first cavity is provided with a first inlet and a first outlet. The second cavity is provided with a second inlet and a second outlet.