Multi-Terminal Battery Cell Layout Without Separate Bus Bars
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Solution Overview
Problem
Conventional battery modules require separate bus bars for electrical connections, limiting design flexibility, increasing resistance, and complicating assembly and quality control, especially in large-capacity applications like electric vehicles.
Innovation Solution
A battery cell design where cathode and anode terminals are formed on both sides and can be connected in various configurations without a separate bus bar, allowing for flexible electrical connections and improved scalability by forming terminals with the same or different polarities on opposing sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate bus bar structure is used for electrical connections in battery modules, then the electrical connection between battery cells is achieved, but the device complexity increases and the manufacturing precision becomes more difficult to control
Solution Approach 1:
The patent merges the electrode terminal and the connection structure into a single integrated component. The electrode terminal is designed with a protruding structure that directly connects to adjacent battery cells, eliminating the need for separate bus bars. This integration reduces the number of parts and simplifies the overall structure while maintaining reliable electrical connection.
Solution Approach 2:
The electrode terminal serves multiple functions: it acts as both the electrical conductor and the mechanical connection structure. The protruding terminal structure provides both electrical connectivity and structural support for assembling battery modules, reducing the need for additional specialized components.
2Reliability
If a separate bus bar is used for interconnecting battery cells, then electrical connection is established, but the resistance increases and energy loss occurs
Solution Approach 1:
By integrating the connection function into the electrode terminal itself, the patent eliminates the additional bus bar interface. This reduces the total contact resistance and number of connection points, thereby minimizing energy loss due to resistance.
3Ease of manufacture
If battery modules are configured with fixed terminal positions, then manufacturing is simplified, but the adaptability for different device applications is reduced
Solution Approach 1:
The patent employs a flexible terminal configuration where the protruding electrodes can be arranged in different patterns (e.g., both terminals on the same side or on opposite sides) depending on the application requirements. This dynamic design approach allows the same battery cell structure to adapt to various mounting configurations and device layouts.
Solution Approach 2:
The battery cell design with flexible terminal positioning serves multiple application scenarios. The same cell structure can be configured for different device orientations and space constraints, enhancing versatility without requiring multiple specialized designs.
4Reliability
If additional bus bars are added for electrical connections, then connectivity is improved, but the manufacturing precision and quality control become more difficult
Solution Approach 1:
The patent combines the electrical connection function into the electrode terminal structure itself, eliminating separate bus bar components. This integration reduces the number of welding or connection operations required, thereby simplifying quality control and improving manufacturing precision.
Data Source
AI summary
Provided are a battery cell having a plurality of electrodes and a battery module using the same. In order to configure the battery module only by connections of the electrodes without including a separate bus bar and improve the degree of freedom of the connections, the battery cell having cathode terminals and anode terminals protruding to the outside includes: a plurality of electrode terminals selected from the cathode terminals or the anode terminals and formed on both sides of the battery cell opposing each other. The battery cell having the plurality of electrodes and the battery module formed in various forms according to a layout of a vehicle using the same may be configured.