Motor-to-Pack Fluid Ducting for Cold-Weather Battery Heating
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Solution Overview
Problem
The energy capacity of electrical energy storage packs in electric snowmobiles decreases at lower temperatures, reducing operating range and charging efficiency.
Innovation Solution
A ducting system with a fluid control assembly is used to direct fluid between the electric motor housing and the electrical energy storage pack housing, capturing heat from the motor and delivering it to the storage pack to maintain optimal operating temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electrical energy storage pack operates in cold environments (near or below 0°C), then the vehicle can be used in snowy conditions, but the energy capacity of the electrical energy storage pack decreases
Solution Approach 1:
The patent captures waste heat from the electric motor, which would otherwise be discarded, and redirects it to the electrical energy storage pack. This converts a harmful waste product (excess heat from motor operation) into a beneficial resource (thermal energy to warm the battery pack), thereby maintaining energy capacity in cold environments without requiring additional energy input.
Solution Approach 2:
The patent merges the thermal management functions of the electric motor and the electrical energy storage pack by creating a shared thermal pathway. The motor housing and storage pack housing are thermally coupled through controlled fluid flow, allowing the two components to share thermal resources and work together to maintain optimal operating temperatures.
2Adaptability or versatility
If the electrical energy storage pack operates in cold environments, then the vehicle can function in snowy conditions, but the charging efficiency is reduced or charging is prevented altogether
Solution Approach 1:
The system converts waste heat from motor operation into useful thermal energy that prevents the electrical energy storage pack from entering temperature ranges where charging is prevented or inefficient. By maintaining the pack temperature above critical thresholds, the system ensures charging can proceed efficiently even in cold snowy environments.
3Temperature
If fluid flow is controlled between motor housing and storage pack housing to transfer heat, then the temperature of the electrical energy storage pack is raised, but the system complexity increases
Solution Approach 1:
The patent combines the motor housing and storage pack housing into a thermally integrated assembly where the fluid control assembly manages heat distribution between both components. This merging approach allows a single fluid circulation system to serve dual purposes: cooling the motor while simultaneously heating the storage pack, thereby reducing overall system complexity compared to separate thermal management systems.
Solution Approach 2:
The fluid control assembly performs multiple functions simultaneously: it acts as a coolant for the electric motor, a heating source for the electrical energy storage pack, and a thermal regulator for the entire system. This multi-functionality reduces the need for separate components and simplifies the overall thermal management architecture.
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
Improves the energy capacity and operating range of the electrical energy storage pack by using motor waste heat to warm the storage pack, enhancing performance.
Implementation Method 1
fluid is directed through the electric motor housing to capture heat from the electric motor and is further directed through the electrical energy storage pack housing to deliver the captured heat to the electrical energy storage pack
Implementation Method 2
deliver the captured heat to the electrical energy storage pack
Data Source
AI summary
Techniques involve utilizing a ducting system for an electric vehicle. The ducting system includes a motor housing constructed and arranged to house at least a portion of an electric propulsion motor of the electric vehicle. The ducting system further includes a storage pack housing coupled with the motor housing, the storage pack housing being constructed and arranged to house at least a portion of an electrical energy storage pack that supplies electric power to the electric propulsion motor. The ducting system further includes a fluid control assembly constructed and arranged to control fluid flow between the motor housing and the storage pack housing.