Modular EV Transmission Case for Scalable Two-Speed Drivetrains
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Solution Overview
Problem
Existing electric vehicle transmission systems are complex and costly, with a lack of modular designs that can efficiently accommodate varying power requirements and vehicle types, leading to increased development and production expenses.
Innovation Solution
A modular transmission system for electric vehicles featuring a two-speed transmission with three spur gear stages and a switching unit, allowing for high modularity, reduced complexity, and economies of scale, along with the option for power take-off and use of high-speed electric drive units, enabling efficient power distribution and torque generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a modular transmission system is implemented, then manufacturing costs are reduced and economies of scale are achieved, but the complexity of accommodating varying power requirements and vehicle types increases
Solution Approach 1:
The transmission system is divided into modular components that can be independently manufactured and assembled. This segmentation allows standardization of parts across different vehicle types, reducing manufacturing costs through economies of scale while maintaining the ability to configure different modules to meet varying power requirements.
Solution Approach 2:
The modular transmission system is designed with universal components that can serve multiple functions across different vehicle applications. The same basic module can be adapted for various power requirements and vehicle types through different configuration and assembly arrangements, thus achieving both cost reduction and versatility.
2Device complexity
If transmission complexity is reduced, then production costs decrease, but the ability to handle diverse vehicle power requirements is limited
Solution Approach 1:
By segmenting the transmission into standardized modules, the system reduces overall complexity through repetition of proven designs rather than custom-engineering each transmission. The modular architecture simplifies manufacturing while the configurable assembly of modules maintains adaptability to diverse vehicle requirements.
Solution Approach 2:
The modular transmission system accommodates different vehicle power requirements by changing parameters such as gear ratios, number of modules, and configuration arrangements rather than increasing fundamental complexity. This allows the same basic module design to serve multiple applications with varying demands.
3Use of energy by moving object
If a two-speed transmission with three spur gear stages is used, then power distribution efficiency is improved, but the device complexity increases
Solution Approach 1:
The two-speed transmission with three spur gear stages combines multiple gear functions into a integrated modular unit. This merging of functions within a standardized module improves power distribution efficiency while the modular design prevents excessive complexity by using repeated standardized components rather than unique complex mechanisms.
Data Source
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AI summary
The invention relates, inter alia, to a modular transmission system for a motor vehicle comprising a basic module (54) designed for connection to a drive unit (12). The basic module (54) has a first transmission stage (32), a second transmission stage (34), and a shift unit (36) for switching between the first and second transmission stages (32, 34). The basic module (54) is installed once when assembling a first transmission (14A), and the basic module (54) is installed at least twice when assembling a second transmission (14B).