Cell Supervision Circuit Heat Dissipation Gap Filling
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Solution Overview
Problem
Heat resistance instability during heat dissipation in cell supervision circuits due to gaps between heat transfer units and external fixing plates, affecting the heat dissipation effect and safety of power batteries.
Innovation Solution
A cell supervision circuit design featuring a heat transfer unit with a metal plate supported by a backing plate, a fixing plate with an elastic portion that fills the gap between the metal plate and the fixing plate, and a heat-conducting pad to enhance heat transfer, improving the stability of the heat dissipation interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid connection is used between heat transfer unit and external fixing plate, then structural stability is improved, but heat dissipation stability deteriorates due to gaps caused by flatness deviation
Solution Approach 1:
The patent changes the connection parameter from rigid to elastic by introducing an elastic component. This elastic component can deform to accommodate flatness deviations while maintaining stable thermal contact, thus resolving the contradiction between structural stability and heat dissipation stability.
Solution Approach 2:
The patent introduces an elastic component as an intermediary between the heat transfer unit and external fixing plate. This intermediary absorbs the flatness deviation and maintains continuous thermal contact, solving the heat dissipation stability issue while preserving structural stability.
2Loss of energy
If larger contact area is used between heat transfer unit and external fixing plate, then heat dissipation efficiency is improved, but sensitivity to flatness deviation increases leading to greater heat resistance instability
Solution Approach 1:
The patent changes the mechanical parameter of the connection from rigid to elastic. The elastic component allows the large contact area to be maintained while compensating for flatness deviations, thus improving heat dissipation efficiency without increasing sensitivity to manufacturing errors.
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 stabilizes the heat dissipation process, enhancing the heat dissipation effect and improving the safety and reliability of the battery pack by ensuring consistent contact between the heat transfer unit and the fixing plate.
Implementation Method 1
the elastic portion is recessed toward the metal plate and is in contact with the metal plate under its own elasticity
Implementation Method 2
the heat transfer unit dissipates heat through the metal plate
Data Source
Figure 1~2
Figure 3~5
AI summary
The disclosure relates to a cell supervision circuit and a battery pack. The cell supervision circuit comprises a circuit board (1); a heat transfer unit (2) including a metal plate (21) disposed adjacent to the circuit board (1), wherein the heat transfer unit (2) dissipates heat through the metal plate (21); and a fixing plate (3) connected to the heat transfer unit (2), wherein the fixing plate (3) includes a body portion (31) and an elastic portion (32) formed on the body portion (31), and the elastic portion (32) is used for filling a gap between the metal plate (21) and the fixing plate (3). In the cell supervision circuit according to the embodiment of the disclosure, the elastic portion (32) is formed on the fixing plate (3) connected with the heat transfer unit (2), and is brought into close contact with the metal plate (21) for dissipating heat on the heat transfer unit (2) to fill the gap between the metal plate (21) and the fixing plate (3). Therefore, the problem of heat resistance instability generated during heat dissipation is solved, and the heat dissipation effect of the cell supervision circuit is improved. (Fig. 1)