Battery Connection Terminal Structure for Low-Resistance Surface Contact
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Solution Overview
Problem
The existing battery pack connection terminals experience high voltage drop and contact resistance due to small contact areas, leading to heating issues and instability under vibration, which can cause sparking and deteriorate the contact resistance.
Innovation Solution
A connection terminal design featuring a support portion with multiple support arms and a body portion that includes two connection pieces with inner clamping spaces for surface contact with the electrode piece, increasing the contact area and reducing resistance, while the heat sink enhances heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two or more contact points are used for connection, then the structure is simple, but the contact area is small leading to large voltage drop and contact resistance
Solution Approach 1:
The patent transitions from point contact (0D) to surface contact (2D) by designing the contact surface to extend along a first plane. This dimensional change dramatically increases the contact area between the connection terminal and electrode piece, reducing contact resistance and voltage drop while maintaining structural simplicity.
2Area of stationary object
If two or more contact points are used, then the structure is simple, but heating is serious when large current is passed
Solution Approach 1:
By extending the contact surface along a plane rather than using discrete contact points, the patent increases the contact area dimensionally. This larger surface area distributes the large current more evenly, reducing current density and consequently reducing Joule heating when large current is passed through the connection.
3Reliability
If single point contact is used under vibration, then the structure is simple, but sparking occurs and contact resistance deteriorates
Solution Approach 1:
The patent replaces point contact with surface contact by extending the contact surface along a plane. This multi-point surface contact maintains stable electrical connection under vibration conditions, preventing sparking and contact resistance deterioration that occur with single point contact, while keeping the overall structure simple.
4Area of stationary object
If contact surface extends along a plane, then contact area increases and resistance decreases, but the structure becomes more complex
Solution Approach 1:
The patent merges the contact surface extension with the existing connection terminal body structure. The contact surface extending along a plane is integrated into the connection terminal's overall design, combining the functional requirement of large contact area with the structural requirement of simplicity, avoiding additional complex components.
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 design improves contact stability and reduces heating by increasing the contact area and resilience of the connection pieces, providing a more stable and efficient power transfer.
Implementation Method 1
the contact surface extends along a first plane so that the contact surface is capable of being in surface contact with the electrode piece
Implementation Method 2
a support portion supporting the two connection pieces and disposed at the second end of the body portion
Implementation Method 3
the connection terminal further including a heat sink, wherein the heat sink is connected to the body portion
Data Source
AI summary
A connection terminal includes a body portion having a first end disposed on a power supply device and a second end opposite to the first end, two connection pieces, and a support portion supporting the two connection pieces and disposed at the second end of the body portion. An inner clamping space for clamping an electrode piece is formed between the two connection pieces. The support portion connects the two connection pieces and the body portion, an inner side surface of each of the two connection pieces comprises a contact surface for connecting with the electrode piece, and the contact surface extends along a first plane so that the contact surface is capable of being in surface contact with the electrode piece.