Battery Module Self-Heating via Intermediate Tap Energy Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing heating methods for electrical energy stores in electric vehicles often result in output losses due to external heating systems, which are inefficient and can lead to suboptimal battery performance in cold conditions.
Innovation Solution
A method utilizing an intermediate tap between two storage modules within the electrical energy store, where a control signal from an electronic computing device alternately energizes each module to generate heat based on internal resistance, eliminating the need for additional heating structures and minimizing heat loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external heating systems are used to heat the electrical energy store, then the battery cells can reach the required temperature, but output losses occur and heating efficiency is reduced
Solution Approach 1:
The electrical energy store heats itself by utilizing its own stored electrical energy. The heating apparatus uses electrical energy from the energy store to generate heat through resistive heating elements, eliminating the need for external heating sources and avoiding the output losses associated with external systems.
Solution Approach 2:
The invention converts the electrical energy that would otherwise be used for vehicle operation into useful heat for warming the battery cells. By using the electrical energy store's own energy to heat itself, the system transforms potential energy consumption into a beneficial heating function, particularly useful in cold conditions where battery performance would otherwise deteriorate.
2Temperature
If additional heating structures are added to the electrical energy store, then heating capability is improved, but device complexity increases
Solution Approach 1:
The heating apparatus is integrated into the existing electrical energy store structure, using the same electrical components and housing. The heating elements are incorporated within the existing module architecture, allowing the system to perform both energy storage and heating functions without requiring separate, complex heating structures.
Solution Approach 2:
The heating function is merged with the electrical energy store by integrating heating elements directly into the battery modules. The control unit and heating elements are combined within the existing structural framework, eliminating the need for separate external heating systems and reducing overall device complexity.
3Temperature
If heating is performed externally to the cell modules, then heating coverage is achieved, but heat loss increases
Solution Approach 1:
The heating elements are positioned directly within each battery cell module, providing localized heating where it is most needed. This ensures that heat is generated at the source and distributed efficiently to the battery cells, minimizing heat loss to the surrounding environment and improving overall heating efficiency.
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 allows for efficient heating directly within the storage modules, reducing output losses and ensuring optimal battery performance without additional heating structures, even at low heat outputs, by leveraging internal resistance to produce heat during energization.
Implementation Method 1
the second storage module is energized with electrical energy from the first storage module and, based on the internal resistance of the second storage module during the energization, for heat for heating purposes to be generated in the second storage module
Data Source
AI summary
The present disclosure relates to a method for heating an electrical energy store of an at least partly electrically operated motor vehicle by means of a heating device of the electrical energy store, in which the electrical energy store provided in a manner having at least a first storage module and a second storage module is heated depending on a control signal of an electronic computing unit of the heating device, wherein an intermediate tap is provided between the first and second storage modules and the control signal is generated in such a way that the second storage module is energized with electrical energy from the first storage module and, on the basis of an internal resistance of the second storage module during the energization, heat for heating purposes is generated in the second storage module, and vice versa.