Sealed Battery Pack Airflow for Uniform Cell Temperature
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery systems experience inhomogeneous temperature distribution due to varying heat dissipation rates among battery cells, leading to premature power throttling, uneven aging, and reduced lifespan, necessitating air cooling methods that compromise housing integrity.
Innovation Solution
A battery system with a hermetically sealed metallic housing and internal fans controlled by a battery management system to redistribute heat within the battery housing, ensuring homogeneous temperature distribution without external openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air cooling with inlet and outlet openings is used, then heat dissipation is improved, but housing integrity and sealing are compromised
Solution Approach 1:
The patent introduces a heat transfer fluid as an intermediary substance that circulates through the battery housing to transfer heat from the battery cells to the housing walls, enabling heat dissipation without requiring direct openings in the housing that would compromise sealing
Solution Approach 2:
The patent employs a liquid cooling system where a heat transfer fluid circulates through channels within the battery housing, using hydraulic principles to transfer thermal energy from the battery cells to the external environment while maintaining housing integrity
2Quantity of substance
If battery cells are arranged close together for high energy density, then energy density is improved, but temperature uniformity deteriorates
Solution Approach 1:
The patent implements temperature sensors at multiple locations within the battery pack and adjusts the cooling fluid distribution to provide localized cooling where needed, ensuring uniform temperature distribution across densely packed battery cells with different thermal conditions
Solution Approach 2:
The patent uses temperature sensors to monitor the thermal state of individual battery cells and adjusts the cooling fluid flow accordingly, creating a feedback control system that maintains temperature uniformity despite the high density arrangement of battery cells
3Reliability
If a single cell reaches critical temperature, then safety is ensured, but overall battery power is throttled prematurely
Solution Approach 1:
The patent implements a proactive cooling system that anticipates temperature rise in battery cells and activates cooling before critical temperatures are reached, preventing the need for power throttling while maintaining safety margins
Solution Approach 2:
The patent dynamically adjusts cooling parameters such as fluid flow rate and temperature based on real-time battery thermal conditions, optimizing the balance between safety requirements and power output by modifying cooling intensity rather than simply throttling power
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
Uniform cell aging and extended battery performance by evenly distributing waste heat, preventing premature throttling and enhancing lifespan while maintaining a lightweight and cost-effective design.
Implementation Method 1
at least one fan is arranged within the battery housing, wherein the at least one fan can be controlled by the battery management system depending on whether a temperature threshold of the individual battery cells is exceeded
Implementation Method 2
During operation, each individual battery cell exhibits a certain power loss. This power loss is dissipated as waste heat into the interior of the battery housing
Implementation Method 3
A battery system comprises a metallic battery housing with a base body having a first cover element and a second cover element
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a battery system (200) with a battery housing which comprises a main part (201), a first cover element (202), and a second cover element (203). The first cover element (202) closes a first open end face of the main part (201), and the second cover element (203) closes a second open end face of the main part (201). The battery system also comprises a battery cell holder (204) which has a plurality of battery cells (205), said battery cell holder (204) being arranged within the battery housing, The battery system also comprises a battery management system (109) which is configured to monitor the plurality of battery cells (205) and detect temperatures of the individual battery cells (205). The invention is characterized in that at least one fan (206) is arranged within the battery housing, and the at least one fan (206) is actuated by the battery management system (109) depending on a threshold being exceeded by the temperature of the individual battery cells (205).