Secondary On-Board Network Battery With Integrated Switching
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Solution Overview
Problem
Vehicle electrical systems for motor vehicles face challenges in being cost-effective, weight-saving, and minimizing power loss due to the need for DC/DC converters, which occupy space, increase weight, and require complex cooling systems.
Innovation Solution
A secondary vehicle electrical system battery with a battery cell assembly and integrated switching devices that allow for energy flow between the secondary and primary systems, eliminating the need for DC/DC converters by providing redundant energy supply and overload protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DC/DC converters are used to supply secondary vehicle electrical systems from the primary system, then voltage conversion and constant output voltage are achieved, but installation space increases, weight increases, and power loss occurs
Solution Approach 1:
The patent merges the secondary battery with the primary battery into a single battery housing, eliminating the need for separate DC/DC converters. The secondary battery is electrically connected to the primary battery through a switching device that enables direct energy transfer, thereby achieving voltage conversion and power supply without the weight and space requirements of traditional DC/DC converters.
Solution Approach 2:
The secondary battery serves multiple functions: it acts as an energy storage device for the secondary vehicle electrical system, provides backup power during primary system failures, and enables direct power transfer from the primary system when needed. This multi-functionality replaces what would traditionally require separate DC/DC conversion systems.
2Reliability
If DC/DC converters are used for voltage conversion, then output voltage stability is improved, but device complexity and cooling requirements increase
Solution Approach 1:
The patent combines the secondary battery system with the primary battery system in a single housing, eliminating the need for separate DC/DC converters and their associated cooling systems. The direct electrical connection through switching devices simplifies the overall system architecture and removes the complexity of thermal management for power conversion components.
3Reliability
If a secondary vehicle electrical system with redundant components is implemented, then reliability for automated driving is improved, but weight and cost increase
Solution Approach 1:
The patent merges the secondary battery with the primary battery into a single housing, making the secondary battery significantly lighter than a completely separate redundant battery system would be. The shared housing and integrated design reduce the overall weight while maintaining the redundancy needed for automated driving operations.
Solution Approach 2:
The secondary battery provides multiple benefits: it serves as the energy source for secondary vehicle electrical system components, provides backup power during primary system failures, and enables direct power transfer when needed. This multi-functionality reduces the need for additional separate systems, thereby reducing overall weight.
4Power
If DC/DC converters are used between primary and secondary systems, then power conversion is achieved, but power loss increases
Solution Approach 1:
The patent merges the primary and secondary batteries into a single system with direct electrical connection through switching devices. This eliminates the power losses associated with DC/DC conversion by enabling direct energy transfer from the primary battery to the secondary battery and to secondary vehicle electrical system components, thereby significantly reducing power loss.
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 reduces weight, cost, and installation space while maintaining reliable energy supply, especially in automated driving modes, by integrating switching devices and a control system within a compact battery housing, thereby minimizing power loss and ensuring fail-safe operation.
Implementation Method 1
a battery cell assembly (11) for providing electrical energy
Implementation Method 2
a first switching device (18) between the first connection (13) and a connection point (16) electrically connected to the battery cell assembly (11), and a second switching device (18) between the second connection (14) and the connection point (16)
Data Source
AI summary
A secondary on-board network battery for a secondary on-board network that is redundant to a primary on-board network of a motor vehicle, includes: a battery cell composite for providing electrical energy; a first connection for electrically connecting the secondary on-board network battery to at least one secondary on-board network component; a second connection for electrically connecting the secondary on-board network battery to the primary on-board network; a first switching device between the first connection and a connection point that is electrically connected to the battery cell composite; a second switching device between the second connection and the connection point, and a control unit configured to provide a conducting state for both switching devices for supplying the at least one secondary on-board network component from the primary on-board network, and for providing a locking state for the second switching device for keeping an overload on the primary on-board network side away.