LiDAR Graphite Heat Conduction Layout for Dense Laser Arrays
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Solution Overview
Problem
Conventional LiDAR systems face challenges in forming fixed heat conduction connections and efficiently dissipating heat due to manufacturing tolerances and close laser arrangements, which complicate optical alignment and increase thermal resistance.
Innovation Solution
A tripartite configuration comprising an opto-mechanical bracket, thermal conduction bracket, circuit boards, and a graphite sheet with extension portions, forming a continuous thermal pathway to efficiently transfer heat from lasers to heat dissipation components, using connecting pillars and adhesive backing for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple lasers are arranged closely on the circuit board to increase the number of lines, then angular resolution is improved, but heat dissipation becomes more difficult and thermal resistance increases
Solution Approach 1:
The patent transitions from planar heat conduction to three-dimensional heat conduction by extending the graphite sheet vertically between circuit boards and horizontally to heat dissipation components, creating a spatial network that efficiently manages heat in densely packed laser arrangements
Solution Approach 2:
The graphite sheet acts as a thermal intermediary, capturing heat from laser sources through direct contact and transferring it to heat dissipation components, thereby decoupling the heat generation and heat dissipation locations
2Measurement precision
If optical components are adjusted to account for manufacturing tolerances, then measurement precision is improved, but the ability to form fixed heat conduction connections deteriorates
Solution Approach 1:
The patent separates optical adjustment and heat conduction functions into independent components: the graphite sheet provides flexible thermal contact without requiring precise mechanical alignment, while optical components can be independently adjusted for their optical paths
Solution Approach 2:
The graphite sheet's thermal conductivity parameter is optimized to compensate for positional variations, ensuring stable heat conduction even when component positions vary within tolerance ranges
3Device complexity
If the same space is used for both optical components and heat conduction structures, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The graphite sheet serves multiple functions simultaneously: it acts as a heat conduction path, a structural support element, and a flexible adapter that accommodates positioning variations, reducing the need for separate dedicated 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 solution ensures efficient heat transfer and maintains optimal operating temperatures, reducing thermal resistance and enhancing device reliability by improving temperature uniformity and reducing calibration costs.
Implementation Method 1
a graphite sheet, including: a contact portion, disposed on the side of the circuit board facing away from the lasers; a first extension portion, extending from the contact portion in a first direction to contact the opto-mechanical bracket; and a second extension portion, extending from the contact portion in a second direction to contact the thermal conduction bracket
Data Source
AI summary
A thermal conduction device for a LiDAR includes an opto-mechanical bracket in contact with a heat dissipation component; a thermal conduction bracket spaced apart from the opto-mechanical bracket and in contact with the heat dissipation component; a plurality of circuit boards disposed at intervals and in parallel between the opto-mechanical bracket and the thermal conduction bracket, to accommodate a plurality of lasers, the plurality of lasers being arranged in a straight line at intervals along a placement direction of the circuit board; and a graphite sheet including a contact portion laid on a side of the circuit board away from the lasers; a first extension portion extending from the contact portion in a first direction to make contact with the opto-mechanical bracket; and a second extension portion extending from the contact portion in a second direction to make contact with the thermal conduction bracket. The disclosure further provides a LiDAR. DRAWINGS