Battery Module Cooling Layout for Uniform Connector Heat Control
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Solution Overview
Problem
Existing battery devices for motor vehicles inefficiently cool battery modules and connectors due to unequal cooling power distribution, leading to increased ohmic resistance and reduced service life.
Innovation Solution
A battery device design with coolant inlet openings on opposite end sides of housings, allowing coolant to flow laterally through battery modules and centrally through the battery module connector, ensuring balanced cooling power and reducing ohmic losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant is supplied through a single central inlet to cool both battery modules and connector, then the connector is cooled effectively, but the battery modules receive insufficient cooling power
Solution Approach 1:
The single central coolant inlet is segmented into multiple inlet openings distributed across the housing surfaces. This allows coolant to be supplied to multiple locations simultaneously, ensuring that both battery modules and connector receive adequate cooling power without compromising either component's temperature control
2Temperature
If coolant inlet openings are located only at the center, then the connector is cooled, but the battery modules at the ends receive insufficient cooling
Solution Approach 1:
Coolant inlet openings are strategically positioned at different locations including end regions and central regions of the housing surfaces. This local distribution ensures that coolant is delivered close to each heat-generating component, providing locally optimized cooling for both battery modules and connector based on their specific thermal requirements
3Temperature
If coolant channels are arranged only centrally, then the connector is cooled effectively, but the battery modules experience higher temperatures due to longer heat transfer paths
Solution Approach 1:
The coolant channel arrangement transitions from a single central location to a distributed three-dimensional network throughout the housing. Coolant channels are positioned in proximity to both battery modules and connector, creating multiple short heat transfer paths rather than one long path, thereby effectively cooling all components simultaneously
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
Optimizes temperature control and extends the service life of battery modules by providing uniform cooling across the device, enhancing mechanical stability and reducing kinetic energy absorption during accidents.
Implementation Method 1
the heat produced at the battery module connector can be transmitted by thermal conduction to the battery cells
Implementation Method 2
Liquid cooling systems have proven highly effective here. Typically, thermal contacts which are attached thermally to the battery cells, for example via a heat-conducting paste, are acted upon with a liquid coolant
Data Source
AI summary
A battery device for a motor vehicle, having a first battery module with a first housing, a second battery module which is arranged next to the first battery module in a first direction (X) with a second housing, a coolant channel, and a battery module connector arranged in the coolant channel for electrically contacting the first and the second battery module. The first and the second housing have coolant inlet openings on respective opposite end sides in a second direction (Y) arranged orthogonally to the first direction (X). In each case one coolant outlet opening is arranged in the center of the first or second housing with respect to the second direction (Y) and leads into the coolant channel.