Terminal Heat Radiation Plate for Electric Working Machine
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Solution Overview
Problem
Charging type electric working machines experience increased heat generation at terminals due to higher electric current supply, leading to potential resin melting and reduced performance.
Innovation Solution
Incorporating plate-shaped heat radiation members at the terminals that are thermally conductive and arranged in a manner to enhance heat dissipation, including positive and negative electrode connecting terminals with heat radiation plate portions that face each other, and using insulating resin portions to improve insulation and heat radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If higher electric current is supplied to increase output, then power and productivity are improved, but heat generation at terminals increases causing resin melting and reliability deterioration
Solution Approach 1:
The patent adds a heat radiation plate portion that extends in a direction perpendicular to the connection plate portion, transitioning from a two-dimensional connection structure to a three-dimensional heat dissipation structure. This vertical extension creates additional heat radiation surface area without interfering with the electrical connection function, effectively separating the electrical connection dimension from the thermal management dimension.
Solution Approach 2:
The heat radiation plate portion acts as an intermediary thermal management component between the connection plate portion (heat source) and the surrounding environment. It conducts heat away from the terminal area and radiates it to the atmosphere, preventing heat accumulation that would otherwise cause resin melting and reliability issues.
2Reliability
If heat radiation plate portion is added to improve heat dissipation, then temperature control and reliability are improved, but device complexity increases
Solution Approach 1:
The heat radiation plate portion is integrated with the connection plate portion as a unified terminal structure. Both functions (electrical connection and heat radiation) are combined in a single component rather than using separate parts, thereby improving heat management while minimizing the increase in device complexity.
Solution Approach 2:
The terminal structure is designed to perform multiple functions simultaneously: the connection plate portion provides electrical connection while the integrated heat radiation plate portion provides thermal management. This multi-functionality reduces the need for additional separate components, keeping the overall device complexity low while achieving reliable heat dissipation.
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 effectively improves heat radiation performance, reduces the risk of terminal overheating, and maintains insulation, thereby enhancing the operational reliability and efficiency of electric working machines.
Implementation Method 1
a heat radiation plate portion being a plate-shaped member is provided at the at least one heat radiation object individually in a thermally conductive manner
Implementation Method 2
heat generated at the connecting terminal provided with the heat radiation member is not only radiated from the connection plate portion but also is conducted to the heat radiation plate portion so as to be radiated from the heat radiation plate portion
Data Source
AI summary
An electric working machine according to one aspect of the present disclosure includes a terminal block electrically connected to a battery pack. The terminal block includes a positive electrode connecting terminal and a negative electrode connecting terminal. The positive electrode connecting terminal includes a plate-shaped positive electrode side connection plate portion that comes in contact with a positive electrode terminal of the battery pack, and the negative electrode connecting terminal includes a plate-shaped negative electrode side connection plate portion that comes in contact with a negative electrode terminal of the battery pack. At least one of the positive electrode side connection plate portion and the negative electrode side connection plate portion is provided with a heat radiation plate portion in a thermal conductive manner.