Dual-Sided Battery Heating Plate for Low-Temperature Efficiency

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Solution Overview

Problem

Existing temperature regulation members for batteries have low heating efficiency, necessitating improvements to ensure effective operation in low-temperature environments.

Innovation Solution

A temperature regulation member with a thermally conductive plate and heating film on both sides, increasing the heating area and efficiency by directly contacting and heating the battery core, while utilizing a thermally conductive adhesive layer for stable connection and a thermally conductive insulation film for safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a temperature regulation member is arranged to heat the battery in low-temperature environment, then the battery can operate in normal temperature range, but the heating efficiency is relatively low

Engineering Contradiction:
Improvebattery operating temperatureVSAvoidheating efficiency
Core Design Contradiction:
TemperatureVSProductivity

Solution Approach 1:

The heating film is arranged on both sides of the thermally conductive plate in the thickness direction, transforming a single-sided heating structure into a dual-sided heating structure. This dimensional change doubles the heating area and allows simultaneous heating of battery cores on both sides, significantly improving heating efficiency while maintaining the battery's normal operating temperature

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

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 enhances heating efficiency, stabilizes the connection with the battery core, and ensures safe operation by preventing local overheating and short circuits, thereby improving the battery's performance and service life.

Implementation Method 1

the heating film is configured to heat a battery core

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 2

a thermally conductive plate and a heating film. Each of two sides of the thermally conductive plate in a thickness direction is provided with the heating film

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

An adhesive layer is arranged in the connection region. The adhesive layer is configured to connect to the battery core

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP4611118A1Temperature regulation member, battery assembly, and vehicle
Publication Date: 2025.09.03 BYD CO LTD
  • EP4611118A1 patent drawingFigure 1~2
  • EP4611118A1 patent drawingFigure 3~4
  • EP4611118A1 patent drawingFigure 5

AI summary

The present disclosure discloses a temperature regulation member, a battery assembly, and a vehicle. The temperature regulation member includes a thermally conductive plate and a heating film. Each of two sides of the thermally conductive plate in a thickness direction is provided with the heating film. The heating film is configured to heat a battery core. According to the temperature regulation member in embodiments of the present disclosure, the temperature regulation member includes the thermally conductive plate and the heating film, the heating film is configured to heat the battery core, and each of the two sides of the thermally conductive plate in the thickness direction is provided with the heating film. In this way, a heating area of the temperature regulation member can be increased, so that the temperature regulation member has relatively high heating efficiency, thereby improving heating efficiency for the battery core.