Thermal management system for electric construction machinery and control method therefor, and electric construction machinery

By connecting air conditioning units and heat dissipation units in parallel, and combining them with circulating media and air circulation devices, the thermal management system of electric construction machinery has been optimized, solving the problems of low heat transfer efficiency and high energy consumption in existing systems, and achieving cost reduction and energy efficiency improvement.

WO2026129867A1PCT designated stage Publication Date: 2026-06-25JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD
Filing Date
2025-10-27
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

The existing thermal management system for megawatt-level pure electric mining machinery suffers from low heat transfer efficiency, high cost, and high energy consumption. In particular, the cooling demand is high during charging in high-temperature environments. The existing solution involves separate cooling for each battery pack, resulting in a large number of heat exchangers and a complex system.

Method used

Multiple air conditioning units and heat dissipation units are arranged in parallel. They exchange heat with the battery pack through a circulating medium. The heat dissipation units are used to reduce the temperature of the battery pack and air conditioning units. The controller controls the start and stop of the temperature control system and accelerates heat exchange in combination with the air circulation device to form multiple circulation loops to optimize thermal management.

Benefits of technology

It effectively reduces the number of heat dissipation units, lowers investment costs, simplifies the system structure, improves system heat transfer efficiency, improves overall vehicle energy consumption, and avoids the problems of blockage and heat dissipation efficiency degradation in air-cooled systems.

✦ Generated by Eureka AI based on patent content.

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Abstract

A thermal management system for electric construction machinery, the thermal management system comprising a battery pack (1), a first liquid storage tank (2), a first liquid pump (3), a plurality of first air-conditioning units (4) arranged in parallel, a heat dissipation group (5) and a first controller (6), wherein the battery pack provides a driving force; the first liquid storage tank stores a circulating medium; the first liquid pump is in communication with the first liquid storage tank; the first liquid pump is connected to the battery pack to form a first circulating loop (100); the first liquid pump drives the circulating medium to flow through the battery pack, such that the circulating medium exchanges heat with the battery pack; each first air-conditioning unit comprises a compressor (41), a condenser (42), a first throttling device (43) and a first evaporator (44), and the first air-conditioning units reduce the temperature of the circulating medium in the first circulating loop; the heat dissipation group dissipates heat from the condensers in the first air-conditioning units and / or reduces the temperature of the circulating medium flowing through the battery pack; and the first controller controls, on the basis of the temperature of the battery pack, the plurality of first air-conditioning units and the heat dissipation group to start and stop. The thermal management system effectively reduces the number of heat dissipation groups, thereby facilitating an improvement in the heat transfer efficiency of the system, and improving the energy consumption of a whole vehicle. In addition, further disclosed are a control method and electric construction machinery.
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