Battery Thermal Management with Dual Trunk Paths for Regional Cooling

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Solution Overview

Problem

Conventional thermal management systems for vehicles often fail to provide optimal temperature control for different regions of a battery, leading to inefficiencies and increased energy consumption.

Innovation Solution

A thermal management system with a battery thermal management subsystem featuring independent trunk paths for different battery regions, allowing for tailored heat exchange through separate first and second trunk paths and heat exchangers, enabling efficient temperature regulation across various battery regions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a single thermal management path is used for the battery, then the system structure is simple, but the temperature control efficiency for different battery regions is insufficient

Engineering Contradiction:
Improvetemperature control efficiencyVSAvoidsystem structure
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The battery thermal management system is segmented into multiple independent trunk paths (first trunk path and second trunk path), each serving different battery regions. This segmentation allows differentiated temperature control for various battery modules, improving temperature control efficiency while maintaining manageable system complexity through modular design.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different trunk paths are assigned to different battery regions based on their specific thermal characteristics and heat generation patterns. Each region receives customized thermal management through its dedicated trunk path, enabling local optimization of temperature control efficiency without requiring complete system redesign.

Inventive Principle:
Principle #3Local quality

2Use of energy by moving object

If heat exchange with battery module is optimized, then energy consumption is reduced, but system complexity increases

Engineering Contradiction:
Improveenergy consumptionVSAvoidsystem complexity
Core Design Contradiction:
Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The thermal management system merges the battery thermal management subsystem with the air conditioning subsystem through heat exchangers. This integration allows the air conditioning system to serve dual purposes (vehicle climate control and battery thermal management), reducing overall energy consumption while avoiding the need for completely separate systems that would increase complexity.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The air conditioning subsystem is designed with multi-functionality, serving both vehicle climate control and battery thermal management through shared components and heat exchangers. This universal design reduces energy consumption by eliminating redundant systems while maintaining manageable complexity through integrated architecture.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 approach reduces energy consumption and enhances the functionality of the thermal management system by ensuring proper heat exchange efficiency across different battery regions, improving temperature uniformity and overall system performance.

Implementation Method 1

the first trunk path being configured to exchange heat with a first region of a battery, the second trunk path being configured to exchange heat with a second region of the battery

Methodology Applied
Scientific EffectHeat conduction: Conduction (thermal)

Implementation Method 2

heat can be exchanged to the first region and the second region of the battery by using the first trunk path and the second trunk path respectively

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 3

the battery thermal management subsystem and the air conditioning subsystem exchanging heat through the first heat exchanger

Methodology Applied
Scientific EffectHeat exchange: Heat Exchanger

Data Source

PatentUS20250219198A1Thermal management system and vehicle having same
Publication Date: 2025.07.03 BYD CO LTD
  • US20250219198A1 patent drawing
  • US20250219198A1 patent drawing
  • US20250219198A1 patent drawing

AI summary

A thermal management system includes a battery thermal management subsystem having a first trunk path and a second trunk path. The first trunk path is configured to exchange heat with a first region of a battery, and the second trunk path is configured to exchange heat with a second region of the battery, where the first region and the second region are different. At least one of the first trunk path and the second trunk path exchanges heat with the battery. The system includes at least one first heat exchanger arranged at the battery thermal management subsystem and an air conditioning subsystem. The battery thermal management subsystem and the air conditioning subsystem exchange heat through the first heat exchanger.