Integrated Battery Pack Cooling for Cells and Distribution Box

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Solution Overview

Problem

Existing battery pack cooling structures are ineffective in cooling the distribution box, leading to high design costs and reduced performance, as they often require additional cooling systems.

Innovation Solution

A battery pack design that includes a battery box with a distribution cavity and a thermoregulation member connected to the box, featuring a refrigerant inlet/outlet joint and flow channels that communicate with an external pipeline, allowing for efficient cooling of both the cell and distribution box without additional pipe joints, reducing cooling costs and preventing thermal runaway.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a cooling structure is arranged in a battery box to cool cells, then cell cooling is improved, but the distribution box cannot be effectively cooled and additional cooling structures are needed

Engineering Contradiction:
Improvecell temperatureVSAvoiddistribution box cooling effectiveness
Core Design Contradiction:
TemperatureVSReliability

Solution Approach 1:

The cooling structure is designed to serve dual functions: it cools both the battery cells and the distribution box simultaneously through a single integrated system. The cooling plate extends to contact both the cell pack and distribution box, eliminating the need for separate cooling structures and achieving uniform temperature distribution across both components.

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

2Temperature

If additional cooling structures are configured for the distribution box, then distribution box cooling is improved, but overall design costs increase

Engineering Contradiction:
Improvedistribution box temperatureVSAvoidcooling system design cost
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The cooling structure merges the cooling functions for both the cell pack and distribution box into a single integrated cooling plate. This unified design eliminates the need for separate cooling systems, reducing overall design complexity and costs while maintaining effective cooling performance for both components.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The single cooling structure is designed to perform multiple cooling functions simultaneously - cooling the cell pack through direct contact and cooling the distribution box through extended contact surfaces, thereby achieving universal cooling capability with a single system.

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

3Adaptability or versatility

If separate cooling structures are used for cells and distribution box, then each component can be cooled independently, but the overall cooling system complexity increases

Engineering Contradiction:
Improveindependent cooling capabilityVSAvoidcooling system structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The cooling system merges independent cooling capabilities into a single integrated cooling plate that simultaneously contacts both the cell pack and distribution box. This unified structure maintains the ability to cool each component independently while avoiding the complexity of multiple separate cooling systems through unified design.

Inventive Principle:
Principle #5Merging (Combining)

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 cools both the cell and distribution box, reducing life degradation from non-uniform temperatures, enhancing safety, and lowering overall cooling costs while maintaining a lightweight design.

Implementation Method 1

The thermoregulation member has a second flow channel connected with the first flow channel... effectively cools both the cell and distribution box

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 2

A battery pack design that includes a battery box with a distribution cavity and a thermoregulation member connected to the box, featuring a refrigerant inlet/outlet joint and flow channels

Methodology Applied
Scientific EffectRefrigerant cooling: Cooling

Data Source

PatentUS20240021912A1Battery pack
Publication Date: 2024.01.18 BYD CO LTD
  • US20240021912A1 patent drawing
  • US20240021912A1 patent drawing
  • US20240021912A1 patent drawing

AI summary

A battery pack includes: a battery box having a distribution cavity; a distribution box disposed in the distribution cavity; the distribution box including a panel; the panel having a first flow channel and a refrigerant inlet/outlet joint in communication with the first flow channel; and a thermoregulation member connected with the battery box; the thermoregulation member having a second flow channel in communication with the first flow channel.