Dual Battery EV Power Transfer for Simpler Motor Supply Control
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Solution Overview
Problem
Power supply control for a motor in an electric vehicle becomes complicated when power is supplied to a drive power storage device during travel.
Innovation Solution
An electric vehicle configuration that includes a first power generation device, a first power storage device, a second power storage device, and a motor, with a cable connecting them, allowing temporary power transfer from the first to the second power storage device without direct supply, and incorporating a hydrogen generation section for additional energy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power is supplied to a drive power storage device during vehicle travel, then the motor can be driven, but the power supply control becomes complicated
Solution Approach 1:
The power storage system is divided into two independent parts: a first power storage device for regenerative braking energy and a second power storage device for drive power. This segmentation allows each device to operate independently with simple control logic, avoiding the complexity of managing a single combined power storage system during vehicle travel.
Solution Approach 2:
The patent introduces an external power supply interface as an intermediary between the first and second power storage devices. The first power storage device charges externally via this interface, and the second power storage device supplies power to the motor, eliminating the need for complex direct control between the two devices during operation.
2Productivity
If the first power storage device directly supplies power to the second power storage device, then charging efficiency improves, but the risk of erroneous power supply and device damage increases
Solution Approach 1:
The external power supply interface serves as a mediator between the first and second power storage devices. Power flows from the first power storage device through this interface to charge the second power storage device, enabling efficient power transfer while preventing erroneous direct connections that could cause device damage.
Solution Approach 2:
The patent extracts the direct electrical connection between the two power storage devices and replaces it with an external interface connection. This separation maintains charging efficiency while eliminating the risk of erroneous power supply and potential device damage from direct internal connections.
3Reliability
If a cable connection is used for external power supply, then erroneous power supply is prevented, but the connection process becomes more time-consuming
Solution Approach 1:
The external power supply interface is designed with universal multi-functionality, serving both as a charging port and a protective barrier. The standardized cable connection provides both power transfer and inherent safety protection, eliminating the need for separate protective mechanisms while maintaining simple, quick connection procedures.
4Quantity of substance
If the capacity of the first power storage device is increased to store more regenerative energy, then energy recovery improves, but the device weight and space requirements increase
Solution Approach 1:
The power storage function is segmented between two devices with different capacity requirements. The first power storage device has smaller capacity for regenerative braking energy, while the second power storage device has larger capacity for drive power. This segmentation reduces the weight of the first device while maintaining overall system energy storage capability.
Solution Approach 2:
The system recovers regenerative braking energy in the first power storage device and then transfers it to the second power storage device for later use. This two-stage recovery and storage approach allows the first device to have smaller capacity since it only needs to hold energy temporarily until it can be transferred to the larger second device.
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 configuration simplifies power supply control, reduces the risk of damage to the second power storage device, and enables efficient energy storage and use, including the use of rainwater as an electrolyte for continuous hydrogen generation.
Implementation Method 1
a first power generation device that generates power, based on natural energy
Implementation Method 2
a first power storage device that stores the power obtained by the first power generation device
Implementation Method 3
a second power storage device that stores the power stored in the first power storage device and supplied via the cable and the input-side terminal unit
Implementation Method 4
a motor that is driven based on the power from the second power storage device
Implementation Method 5
a hydrogen generation section that generates hydrogen, based on the power obtained by the first power generation device
Data Source
AI summary
An electric vehicle includes a first power generation device that generates power, based on natural energy, a first power storage device that stores the power obtained by the first power generation device, an input-side terminal unit that externally receives power supply for charging, a cable that electrically connects the first power storage device and the input-side terminal unit, a second power storage device that stores the power stored in the first power storage device and supplied via the cable and the input-side terminal unit, and a motor that is driven based on the power from the second power storage device.