Cabinet Door Liquid Cooling Layout for Integrated Energy Storage

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Solution Overview

Problem

Current energy storage systems have complex structures due to separate compartments, leading to inconvenient mounting and maintenance, and require additional space for power modules outside the cabinet.

Innovation Solution

An integrated design with a cabinet containing a battery compartment and power compartment, featuring a liquid cooling unit on the cabinet door, forming independent cooling loops for the battery and power modules, and incorporating a door-mounted liquid cooling unit to reduce space and improve maintenance efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate compartments are used for battery module, power module, and temperature control, then functional separation is achieved, but device complexity increases and mounting/maintenance becomes inconvenient

Engineering Contradiction:
Improvefunctional separationVSAvoidcabinet structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the battery compartment, power compartment, and temperature control compartment into a single integrated cabinet structure. The liquid cooling unit is integrated within the cabinet, with cooling channels directly contacting both battery and power modules. This unified design reduces structural complexity while maintaining functional separation through internal partitioning, making mounting and maintenance more convenient.

Inventive Principle:
Principle #5Merging (Combining)

2Device complexity

If liquid cooling unit is integrated within the cabinet, then device complexity is reduced, but heat dissipation efficiency may be compromised

Engineering Contradiction:
Improvecabinet structureVSAvoidheat dissipation efficiency
Core Design Contradiction:
Device complexityVSTemperature

Solution Approach 1:

The patent implements local quality by designing separate cooling channels within the liquid cooling unit that are specifically optimized for different components. The cooling system has dedicated channels for battery modules and power modules, with independent inlet and outlet ports for each. This localized cooling approach ensures optimal heat dissipation efficiency for each component while maintaining the integrated cabinet structure.

Inventive Principle:
Principle #3Local quality

3Area of stationary object

If cabinet door is used to mount liquid cooling unit, then floor area is reduced, but mounting convenience may be affected

Engineering Contradiction:
Improvefloor areaVSAvoidmounting convenience
Core Design Contradiction:
Area of stationary objectVSEase of operation

Solution Approach 1:

The patent segments the liquid cooling unit into a modular design that can be independently mounted on the cabinet door. The cooling unit is designed as a separate assembly with standardized mounting interfaces, allowing it to be attached to the cabinet door without affecting the overall cabinet structure. This segmentation enables space-saving vertical mounting while maintaining ease of installation and maintenance through modular replacement.

Inventive Principle:
Principle #1Segmentation

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 integrated design reduces the floor area and improves heat dissipation efficiency, simplifies the structure, and enhances mounting and maintenance convenience while ensuring safety and ventilation.

Implementation Method 1

When the liquid cooling unit cools the battery module and the power module, a first cooling circulation loop may be formed between the liquid cooling unit and the battery module, and a second cooling circulation loop may be formed between the liquid cooling unit and the power module

Methodology Applied
Scientific EffectHeat dissipation: Convection

Implementation Method 2

a projection of the liquid cooling unit on the cabinet door may overlap at least a part of the cooling area, so that the liquid cooling unit can be cooled by air that enters inside the cabinet through the through hole of the cooling area, and air heated by the liquid cooling unit can also be discharged to the outside of the cabinet through the through hole of the cooling area

Methodology Applied
Scientific EffectAir cooling: Convection

Data Source

PatentEP4604270A1Energy storage system
Publication Date: 2025.08.20 HUAWEI DIGITAL POWER TECH CO LTD
  • EP4604270A1 patent drawingFigure 1~2
  • EP4604270A1 patent drawingFigure 3~4
  • EP4604270A1 patent drawingFigure 5~6

AI summary

This application provides an energy storage system. The energy storage system may include a cabinet and a liquid cooling unit. The cabinet may include a cabinet door and a cabinet body that are disposed in a hinged connection manner, and the cabinet door may be opened or closed relative to the cabinet body. The cabinet body may include a battery compartment and a power compartment. A battery module is disposed in the battery compartment, and a power module is disposed in the power compartment. The liquid cooling unit is disposed on a side that is of the cabinet door and that faces the cabinet body. The liquid cooling unit is connected to the battery module through a first liquid outlet pipe and a first liquid return pipe, and the liquid cooling unit is connected to the power module through a second liquid outlet pipe and a second liquid return pipe. In the energy storage system provided in this application, the battery module, the power module, and the liquid cooling unit are all disposed in the cabinet, so that integration of the energy storage system can be effectively improved, and mounting and maintenance efficiency of the energy storage system can be improved.