Lithium-Ion Battery Mounting for Engine Starting Systems
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Solution Overview
Problem
Existing outdoor power equipment with lead-acid batteries face challenges such as manual starting, tool-dependent maintenance, temperature sensitivity, and frequent replacement, leading to inconvenience and inefficiency.
Innovation Solution
Integration of a removable, rechargeable lithium-ion battery system that powers an electric starting system, allowing for tool-free attachment and charging, improved temperature management, and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lead-acid battery is used to power the electric starting system, then the battery can provide sufficient power for starting, but the battery requires tool-dependent maintenance, is temperature sensitive, and needs frequent replacement
Solution Approach 1:
The patent transitions from lead-acid battery chemistry to lithium-ion battery chemistry, fundamentally changing the chemical parameters of the energy storage system. This parameter change eliminates the need for maintenance while providing comparable or superior starting power, directly resolving the contradiction between reliability and ease of operation
Solution Approach 2:
The patent moves away from the disposable nature of lead-acid batteries that require frequent replacement toward reusable lithium-ion batteries with extended service life. This reduces the frequency of replacement and improves ease of operation while maintaining starting reliability
2Strength
If a lead-acid battery is secured to the equipment with fasteners requiring tools, then the battery is securely mounted, but the attachment and removal process requires tools and is time-consuming
Solution Approach 1:
The patent replaces the mechanical fastening system (screws, bolts, wrenches) with a simplified attachment mechanism that does not require tools. This could include snap-fit connectors, bayonet mounts, or other tool-free securing methods that provide sufficient mounting strength while dramatically reducing attachment time
Solution Approach 2:
The patent separates the battery into a modular unit that can be independently attached and detached without affecting other components. This segmentation allows for quick tool-free removal and replacement while maintaining secure mounting during operation
3Power
If a lead-acid battery is used, then the battery can power the starter motor, but the battery runs down with passage of time and loses charge, requiring seasonal replacement or indoor storage
Solution Approach 1:
The patent changes the chemical composition and physical properties of the battery from lead-acid to lithium-ion technology. This parameter change results in a battery with extended service life, reduced self-discharge rate, and improved performance across a wider temperature range, eliminating the need for seasonal replacement while maintaining starting power
Solution Approach 2:
The patent enables the battery to maintain its charging state over extended periods through superior chemical stability of lithium-ion technology. This allows the battery to remain charged and ready for use throughout the year without requiring removal for indoor storage, ensuring continuous availability of starting power
4Power
If a lead-acid battery is used in cold weather, then the battery may provide sufficient power, but the engine may have difficulty starting or not start at all due to temperature sensitivity
Solution Approach 1:
The patent changes the battery chemistry from lead-acid to lithium-ion, which has fundamentally different temperature characteristics. Lithium-ion batteries maintain their chemical activity and electrical output across a broader temperature range, including colder conditions, eliminating the starting difficulties associated with lead-acid batteries in cold weather
Solution Approach 2:
The patent provides inherent protection against temperature-related starting failures by using lithium-ion chemistry that is less susceptible to cold-weather performance degradation. This beforehand cushioning ensures reliable starting power availability regardless of ambient temperature conditions
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 lithium-ion battery system simplifies starting and maintenance, provides reliable power, and extends the operational life of outdoor power equipment by enabling easy charging and storage, reducing the need for frequent replacements and addressing temperature-related issues.
Implementation Method 1
a lithium-ion battery configured to power the starter motor to start the engine
Data Source
AI summary
An internal combustion engine includes an engine block including a cylinder, a piston positioned within the cylinder, a crankshaft configured to be driven by the piston, a fuel system for supplying an air-fuel mixture to the cylinder, a starter motor, and a lithium-ion battery mounted on the engine, the lithium-ion battery configured to power the starter motor to start the engine, wherein the piston is configured to reciprocate in the cylinder along a cylinder axis, wherein the lithium-ion battery includes at least one lithium-ion cell having a longitudinal cell axis, and wherein the cylinder axis and the longitudinal cell axis are not parallel to one another.