Battery Pack BDU Heat Conduction Plate for Compact Cooling

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Solution Overview

Problem

Current BDU devices in battery packs rely on inefficient natural cooling, leading to high temperatures and reduced reliability due to space constraints.

Innovation Solution

Incorporation of a heating element and a thermally coupled heat conductive plate that dissipates heat externally, improving heat dissipation efficiency and reliability by attaching to the battery pack's bottom protective plate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If natural cooling is used for heat dissipation, then the device structure remains simple, but heat dissipation efficiency is insufficient leading to high temperatures

Engineering Contradiction:
Improveheat dissipation efficiencyVSAvoiddevice structure
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

A heat conductive plate is introduced as an intermediary component between the heating element and the external environment. The plate thermally couples with the heating element through direct contact and conducts heat to its outer surface, enabling efficient heat transfer without requiring complex active cooling systems. This resolves the contradiction by providing effective heat dissipation through a simple passive thermal conduction mechanism.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Volume of stationary object

If components are arranged compactly to save space, then space utilization improves, but heat dissipation becomes less efficient due to limited cooling space

Engineering Contradiction:
Improvespace utilizationVSAvoidheat dissipation efficiency
Core Design Contradiction:
Volume of stationary objectVSTemperature

Solution Approach 1:

The heat conductive plate extends the heat dissipation path from a three-dimensional internal cooling approach to a two-dimensional surface conduction approach. By conducting heat laterally across the plate to its outer surface, the system achieves efficient heat dissipation without requiring additional internal space, thus maintaining compact component arrangement while improving thermal management.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Temperature

If the heat conductive plate is thermally coupled to the heating element, then heat dissipation improves, but the risk of electrical short circuit increases

Engineering Contradiction:
Improveheat dissipationVSAvoidelectrical insulation
Core Design Contradiction:
TemperatureVSReliability

Solution Approach 1:

The heat conductive plate serves as a thermal intermediary that is electrically isolated from the heating element. It thermally couples with the heating element through direct contact to conduct heat away, while its electrically insulating nature prevents electrical short circuits. This resolves the contradiction by providing both efficient heat dissipation and electrical safety through the plate's dual properties.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Temperature

If the second side of the heat conductive plate is located outside the housing, then heat dissipation efficiency improves, but the device complexity increases

Engineering Contradiction:
Improveheat dissipation efficiencyVSAvoidstructural complexity
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The heat conductive plate performs multiple functions: it conducts heat from the heating element, provides electrical insulation, and serves as a structural component that can be integrated into the housing assembly. By making the second side accessible outside the housing, the plate simultaneously achieves efficient heat dissipation and can be thermally coupled with external structures like the battery pack's bottom protective plate, reducing overall system complexity.

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

Enhances heat dissipation and electrical component reliability by using a thermally coupled heat conductive plate, ensuring stable installation and insulation, thereby improving the BDU device's current carrying capacity and overall battery pack reliability.

Implementation Method 1

the heat conductive plate is provided with a first side and a second side opposite to each other, the first side is located in the opening and is thermally coupled with the heating element, and the second side is located outside the housing

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20250220860A1BDU device and battery pack
Publication Date: 2025.07.03 EVE ENERGY CO LTD
  • US20250220860A1 patent drawing
  • US20250220860A1 patent drawing
  • US20250220860A1 patent drawing

AI summary

ABDU device and a battery pack are provided, the BDU device includes a housing, a heating element and a heat conductive plate; one end of the housing is provided with an opening; the heating element is disposed in the housing; the heat conductive plate is provided with a first side and a second side opposite to each other, the first side is located in the opening and is thermally coupled with the heating element, and the second side is located outside the housing.