Battery Module FPC Bent Portion Shock Absorption
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Solution Overview
Problem
Current battery modules face issues with stress concentration and reduced expansion resistance due to the use of plastic members for fixing connectors, which can lead to ineffective shock absorption and increased space occupation.
Innovation Solution
A battery module design featuring a flexible printed circuit (FPC) with a bent portion fixedly connected to the end plate and a connecting plate, allowing the connector to be securely attached without additional plastic members, thereby utilizing the FPC's flexibility to absorb and release vibration shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plastic member is added to fix the connector, then the connector can be securely fixed, but the plastic member occupies space in the battery module and causes stress concentration on the end plate
Solution Approach 1:
The connector fixing function is merged with the FPC structure itself. The FPC's bent portion is directly fixed to the end plate, eliminating the need for a separate plastic member. This integration reduces the number of components and the space they occupy while maintaining reliable connector fixation.
Solution Approach 2:
The plastic member is extracted/removed from the system entirely. The fixing function previously performed by the plastic member is now performed by the FPC structure itself, which is already present in the battery module for electrical connection purposes.
2Reliability
If a plastic member is added to fix the connector, then the connector can be securely fixed, but the groove required for the plastic member leads to stress concentration of the end plate
Solution Approach 1:
The fixing function is merged into the FPC structure, which is already bonded to the end plate. This eliminates the need for a separate groove to accommodate a plastic member, thereby avoiding stress concentration on the end plate while maintaining secure connector fixation.
3Reliability
If a plastic member is added to fix the connector, then the connector can be securely fixed, but the plastic member cannot effectively transfer and release the impact applied to the connector
Solution Approach 1:
The material parameters are changed from rigid plastic to flexible FPC material. The FPC's flexible nature allows it to deform under impact, effectively absorbing and releasing vibration shocks, while still maintaining reliable connector fixation through its bonded connection to the end plate.
Solution Approach 2:
The FPC acts as a flexible structure that can deform to absorb impact. Its flexibility allows it to transfer and release vibration shocks effectively, unlike rigid plastic members that would transmit impact forces directly to the connector and end plate.
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 design enhances shock absorption and reduces stress concentration on the end plate, maintaining the module's structural integrity and efficiency while minimizing space occupation.
Implementation Method 1
the flexible characteristic of the FPC can be used to transfer and release the shock
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present utility model provides a battery module, comprising: a plurality of batteries arranged in a length direction (L); an end plate (2), disposed at the end part of the plurality of batteries in the length direction (L) ; an FPC (3), wherein the FPC (3) comprises a main body portion (31) and a bent portion (32), the main body portion (31) is located above the corresponding battery (1) in a height direction (H) and is electrically connected to the corresponding battery (1), the bent portion (32) is bent and extends from the main body portion (31) and is located on the lower side of the main body portion (31), and the bent portion (32) is fixedly connected to the end plate (2); and a connector (4), fixedly connected to the bent portion (32) of the FPC (3) and electrically connected to the FPC (3). In the battery module according to the utility model, the connector (4) is fixedly connected to the bent portion (32) of the FPC (3), and the bent portion (32) is fixedly connected to the end plate (2). Therefore, the connector (4) is fixed to the end plate (2) by the FPC (3). When the connector (4) is subjected to vibration shock, the flexible characteristic of the FPC (3) can be used to transfer and release the shock.