Electric Vehicle Battery Mounting Sequence
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Solution Overview
Problem
The challenge is to manage the stock of electric vehicles effectively, particularly in preventing battery degradation during storage, as conventional methods lead to complex control and quality issues due to self-discharge and ambient temperature factors, necessitating a method to delay battery mounting and control storage conditions.
Innovation Solution
An assembling method for electric vehicles where the battery unit is mounted separately from the vehicle body, allowing for independent storage and charging, with temperature control and testing, and permitting mounting based on identification information to ensure quality, thereby reducing operational burdens and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery unit is mounted to the vehicle body before stock storage, then the vehicle can be tested and confirmed for quality, but the battery quality is likely to be degraded due to self-discharge and ambient temperature during storage
Solution Approach 1:
The patent divides the electric vehicle into two independent parts: the vehicle body (without battery) and the battery unit. The vehicle body can be stored and transported separately from the battery, allowing the battery to be mounted only when needed. This segmentation prevents the battery from undergoing self-discharge and temperature-related degradation during extended storage periods while still allowing complete vehicle assembly and testing when the vehicle is ready for delivery.
Solution Approach 2:
The vehicle body is prepared, tested, and confirmed for quality in advance without the battery unit mounted. All necessary vehicle body tests and quality confirmations are performed beforehand, so that when the battery is eventually mounted, the vehicle is ready for immediate delivery. This preliminary preparation eliminates the need to keep the battery mounted during storage to perform tests.
2Reliability
If the charger is connected to the battery all the time during storage to prevent self-discharge degradation, then the battery quality is maintained, but the stock management becomes complex
Solution Approach 1:
The battery unit is extracted from the vehicle body and stored separately during the stock period. By removing the battery from the vehicle assembly, there is no need for continuous charging connections or complex stock management systems. The battery can be stored in a simple, cool environment without requiring active power management, significantly simplifying stock management while still preventing degradation through proper storage conditions.
3Ease of manufacture
If the battery unit is mounted to the vehicle body at the vehicle body manufacturing factory, then the vehicle assembly is complete, but the mounting place should be geographically closer to the customer location to reduce transportation costs
Solution Approach 1:
By segmenting the vehicle into battery-less body and separate battery unit, the patent enables flexible assembly locations. The vehicle body can be manufactured and prepared at the factory, then transported to a mounting place closer to the customer where the battery unit is attached. This eliminates the constraint that assembly must occur at the manufacturing factory, allowing the final assembly to happen at a location optimized for customer delivery and reducing transportation distance.
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 approach simplifies stock management, reduces battery degradation, and ensures the delivery of high-quality electric vehicles by allowing separate storage and testing of the battery unit, thereby maintaining its condition until assembly.
Implementation Method 1
connecting an electric power supply unit installed in the vehicle body test place to the electric motor of the vehicle body and supplying electric power from the electric power supply unit to the electric motor
Implementation Method 2
a battery unit including a battery as an electric power supply for an electric motor which generates a driving power transmitted to wheels
Data Source
Figure 1
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AI summary
An assembling method of an electric vehicle comprises the steps of: assembling a vehicle body (2) including a frame (11), wheels (13, 14) and an electric motor (12); conducting a vehicle body test including confirmation of a state of driving power transmission from the electric motor (12) to the wheels (13, 14) by connecting an electric power supply unit (101) installed in a vehicle body test place (112) to the electric motor (12) of the vehicle body (2) and supplying electric power from the electric power supply unit (101) to the electric motor (12); detaching the electric power supply unit (101) from the electric motor (12) and transporting the vehicle body (2) which has passed the vehicle body test from the vehicle body test place (112) to a mounting place (110), in a state in which the battery (3, 61) is not mounted to the vehicle body (2); and mounting the battery (3, 61) to the transported vehicle body (2) in the mounting place (110).