Liquid Cooling Control Using Converter Waste Heat for Battery Heating

Solution Overview

Problem

Existing equipment with high-rate batteries faces energy waste due to inefficient utilization of heat generated by components like bidirectional ACDC, DCDC, and charging cables during operation, leading to unnecessary use of additional heating and heat dissipation components.

Innovation Solution

A liquid-cooling temperature control method that adaptively utilizes heat generated by bidirectional ACDC, DCDC, and charging cables to heat or dissipate heat based on the energy storage battery's state, reducing the need for additional heating or dissipation components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If additional heating components are used to heat the energy storage battery, then the heating effect is improved, but the energy waste increases and device complexity increases

Engineering Contradiction:

Improveenergy storage battery temperatureVSAvoidenergy waste

Core Design Contradiction:

TemperatureVSLoss of energy

Solution Approach 1:

The patent converts the waste heat generated by bidirectional ACDC, DCDC, and charging cable components into useful heating energy for the energy storage battery. By capturing and redirecting this otherwise wasted thermal energy through liquid cooling pipelines, the system eliminates the need for separate heating components while reducing overall energy consumption and improving thermal efficiency.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The liquid cooling pipeline system is designed to serve multiple functions: it cools components during high-temperature operations and simultaneously heats the energy storage battery during low-temperature conditions. This multi-functional approach replaces dedicated heating and cooling components, reducing device complexity and energy waste.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If additional heat dissipation components are used to dissipate heat from bidirectional ACDC, DCDC, and charging cable, then the heat dissipation effect is improved, but the energy waste increases and device complexity increases

Engineering Contradiction:

Improvecomponent temperatureVSAvoidenergy waste

Core Design Contradiction:

TemperatureVSLoss of energy

Solution Approach 1:

The patent converts the waste heat from bidirectional ACDC, DCDC, and charging cable components into useful heating energy for the energy storage battery. By capturing and redirecting this otherwise wasted thermal energy through liquid cooling pipelines, the system eliminates the need for separate heating components while reducing overall energy consumption and improving thermal efficiency.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent merges the cooling function for power conversion components with the heating function for the energy storage battery into a single integrated liquid cooling system. This combination eliminates the need for separate heat dissipation and heating components, reducing device complexity and energy waste while improving overall system efficiency.

Inventive Principle:

Principle #5Merging (Combining)

3Temperature

If separate heating and heat dissipation components are used, then the temperature control precision is improved, but the device complexity increases

Engineering Contradiction:

Improvetemperature control precisionVSAvoidcomponent quantity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The liquid cooling pipeline system is designed to serve multiple functions: it cools components during high-temperature operations and simultaneously heats the energy storage battery during low-temperature conditions. This multi-functional approach replaces dedicated heating and cooling components, reducing device complexity and energy waste.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the cooling function for power conversion components with the heating function for the energy storage battery into a single integrated liquid cooling system. This combination eliminates the need for separate heat dissipation and heating components, reducing device complexity and energy waste while improving overall system efficiency.

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

This method effectively reduces energy waste by optimizing the use of generated heat, improving operational efficiency and reducing noise pollution by minimizing the operation of additional heating and dissipation components.

Implementation Method 1

controlling heat generated by the bidirectional ACDC to heat the energy storage battery... controlling heat generated by the DCDC and the charging cable to heat the energy storage battery... heating the energy storage battery through liquid coolant in the first liquid cooling pipeline

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP4683165A1Liquid-cooling temperature control method, integrated storage and charging device, and computer-readable storage medium

Publication Date: 2026.01.21 SHANGHAI SUNNIC NEW ENERGY TECH CO LTD

Figure 1~3

AI summary

The present disclosure provides a liquid-cooling temperature control method, an integrated storage and charging device, and a computer-readable storage medium. A specific implementation of the method includes: when the energy storage battery has a heating demand, if the energy storage battery is in the charging state, controlling heat generated by the bidirectional ACDC to heat the energy storage battery; when the energy storage battery has the heating demand, if the energy storage battery is in the discharging state, controlling heat generated by the DCDC and the charging cable to heat the energy storage battery. This method can mitigate energy waste.