LDC-Integrated Battery Module for 48V Mild Hybrid Systems
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Solution Overview
Problem
Conventional mild hybrid systems have independently separated 48V LDC and battery management systems, leading to increased manufacturing costs, separate software requirements, and increased man-hours and mounting space needs due to the separation of control units.
Innovation Solution
An LDC-integrated battery management device that integrates the 48V LDC and battery management system under a single electronic control unit, allowing for unified control and removal of pre-charging relays and resistors, enabling self-diagnosis and voltage conversion from 12V to 48V for the battery cell and MHSG.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the 48V LDC and battery management system are independently provided, then each component can be controlled separately, but manufacturing costs are doubled and mounting space is increased
Solution Approach 1:
The patent merges the 48V LDC and battery management system into a single integrated control unit called the LDC-integrated battery module. This consolidation eliminates the need for separate control units, reducing the number of components while maintaining independent control capabilities through software modularization. The integrated module includes both the LDC conversion function and battery management functions in one physical device.
Solution Approach 2:
The LDC-integrated battery module is designed to perform multiple functions: it serves as both the 48V LDC controller and the battery management system. The single control unit can switch between LDC operation mode and battery charging/discharging management, providing universal functionality that replaces two separate specialized devices.
2Reliability
If the 48V LDC and battery management system are independently provided, then each has dedicated control, but control units are separated and software requirements are doubled
Solution Approach 1:
The integrated control unit uses software segmentation to provide dedicated control for different functions. The control software is divided into modular segments: LDC control module and battery management module. Each software module operates independently with dedicated control logic, maintaining the reliability of separate control while being implemented within a single integrated hardware unit.
3Area of stationary object
If separate control units are used, then mounting space is available for each component, but man-hours for mounting are increased
Solution Approach 1:
By combining the LDC and battery management system into one integrated module, the patent reduces the number of separate mounting operations from two to one. The single LDC-integrated battery module requires only one mounting location and one set of electrical connections, significantly reducing installation man-hours while the mounting space required is also reduced compared to housing two separate units.
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
This integration reduces costs and man-hours by eliminating the need for separate components and software, while ensuring efficient voltage management and fault detection through a unified control system.
Implementation Method 1
convert the voltage of 12 V to a voltage of 48 V according to a result of the self-diagnosis
Data Source
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AI summary
A low DC-DC converter (LDC)-integrated battery management device for a 48V mild hybrid system according to the present invention includes an low DC-DC converter (LDC)-integrated battery management device for a 48V mild hybrid system, in which a battery management system and an LDC of a 48V mild hybrid system, which are each controlled by an electronic control unit (ECU), are integrally managed.