Battery Module End Plate Grounding for Low-Voltage Connector ESD
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Solution Overview
Problem
Battery modules are susceptible to electromagnetic compatibility (EMC) and electrostatic discharge (ESD) issues, particularly at low-voltage connectors, which need to be addressed to ensure reliable operation.
Innovation Solution
The battery module design incorporates metallic end plates with a connector grounding part and a connection part around the low-voltage connector, allowing ESD to be grounded externally through a metallic edge or a grounding pin connection, and is protected by an insulating upper cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a low-voltage connector is exposed to the exterior for external device connection, then ease of operation is improved, but the connector becomes susceptible to ESD and EMC issues
Solution Approach 1:
The patent introduces a metallic end plate as an intermediary component between the external environment and the low-voltage connector. This end plate includes a grounding structure that mediates ESD protection by providing a controlled path for electrostatic discharge, thereby protecting the connector while maintaining its external accessibility for device connection.
2Reliability
If ESD protection structures are added around the connector, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the ESD protection function with the existing end plate structure of the battery module. The grounding structure is integrated into the end plate that is already part of the module's structural assembly, combining mechanical support and ESD protection functions into a single component rather than adding separate protection elements.
Solution Approach 2:
The end plate is designed to serve multiple functions: it provides structural closure for the battery module, maintains internal component positioning, and simultaneously offers ESD protection through its integrated grounding structure. This multi-functionality reduces the need for additional dedicated protection components.
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
Effectively grounds ESD induced to low-voltage connectors, mitigating EMC issues and ensuring reliable operation of battery modules in electric vehicles.
Implementation Method 1
at least one of the pair of end plates is made of a metallic material and comprises a connector grounding part located around the connector, and a connection part connected to the connector grounding part
Data Source
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AI summary
Disclosed is a battery module comprising: a circuit board stably placed on the upper parts of multiple battery cells; a bus bar electrically connecting the multiple battery cells and electrically connected to the circuit board; and a pair of end plates respectively positioned at facing opposite end cells among the multiple battery cells which are arranged in one direction, wherein the circuit board comprises a connector formed at one end thereof and exposed to the outside of the battery module to electrically connect with an external device, and at least one of the pair of end plates is made of a metallic material and comprises a connector grounding part surrounding the connector and a connection part connected to the connector grounding part.