Modular Excavator Battery Stack for Adjustable Operating Time
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Solution Overview
Problem
Electrically operated excavators face challenges in efficiently adjusting the capacity of their power storage devices to match varying usage modes, leading to potential weight and cost issues due to fixed battery configurations.
Innovation Solution
The excavator design includes a power storage system with vertically stacked modules, where adjacent modules are coupled via bolts, allowing for easy adjustment of capacity by changing the number of modules, thereby accommodating different usage modes and optimizing energy efficiency and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the capacity of the power storage device is increased to extend operating time, then the operating time is improved, but the weight and cost increase
Solution Approach 1:
The power storage device is divided into multiple independently replaceable battery cases (first battery case, second battery case, etc.), each containing one or more batteries. This segmentation allows users to install only the number of battery cases needed for their specific operating time requirements, avoiding the weight penalty of installing excessive capacity. The coupling brackets enable easy attachment and detachment of individual battery cases without affecting the entire power storage system.
2Duration of action of moving object
If the capacity of the power storage device is increased to extend operating time, then the operating time is improved, but the cost increases
Solution Approach 1:
The power storage device is divided into multiple independently replaceable battery cases (first battery case, second battery case, etc.), each containing one or more batteries. This segmentation allows users to install only the number of battery cases needed for their specific operating time requirements, avoiding the weight penalty of installing excessive capacity. The coupling brackets enable easy attachment and detachment of individual battery cases without affecting the entire power storage system.
Solution Approach 2:
Multiple battery cases are designed with standardized coupling brackets featuring identical coupling holes and mounting structures. This universal design allows any battery case to be interchangeably mounted in any position on the upper body, enabling flexible configuration to meet different operating time requirements without requiring different hardware designs, thereby reducing manufacturing costs.
3Ease of manufacture
If the power storage device is designed with fixed configuration, then the manufacturing is simplified, but the adaptability to different usage modes is reduced
Solution Approach 1:
The power storage device is divided into multiple independently replaceable battery cases (first battery case, second battery case, etc.), each containing one or more batteries. This segmentation allows users to install only the number of battery cases needed for their specific operating time requirements, avoiding the weight penalty of installing excessive capacity. The coupling brackets enable easy attachment and detachment of individual battery cases without affecting the entire power storage system.
Solution Approach 2:
Multiple battery cases are designed with standardized coupling brackets featuring identical coupling holes and mounting structures. This universal design allows any battery case to be interchangeably mounted in any position on the upper body, enabling flexible configuration to meet different operating time requirements without requiring different hardware designs, thereby reducing manufacturing costs.
Data Source
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AI summary
An excavator (100) includes a lower traveling body (1); an upper turning body(3) turnably mounted to the lower traveling body; an actuator (7, 8, 9) configured to drive a driven part including the lower traveling body and the upper turning body; and a power storage device mounted in the upper turning body and configured to serve as an energy source for driving the actuator. The power storage device includes a plurality of power storage modules stacked in a vertical direction, each of the plurality of power storage modules including a power storage part and a housing configured to house the power storage part. The housings of power storage modules among the plurality of power storage modules that are adjacent to each other in the vertical direction, are coupled to each other.