Battery Power Source Unit Wall Protection for Circuit Durability

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional power source units with stacked secondary batteries are prone to damage due to the exposure of control circuits, which can be compromised by container deformation from vibration or impact, leading to reduced durability.

Innovation Solution

The power source unit design incorporates a configuration where the control circuit and relay circuit are positioned on the side faces of the battery module with walls taller than the circuit components, providing protection and improving durability by shielding them from external impacts and deformations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the control circuit is attached to the side face of the battery stack, then the device can be compact and easy to install, but the control circuit becomes exposed and vulnerable to damage from vibration and impact

Engineering Contradiction:

Improveease of installationVSAvoiddurability of control circuit

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The control circuit is nested within a recess formed in the binding plate, which itself is part of the battery module structure. This nesting arrangement allows the control circuit to be integrated into the existing structure without adding external protrusions, maintaining compactness while providing protective enclosure against vibration and impact damage

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The recess in the binding plate serves as an intermediary protective structure between the control circuit and the external environment. This intermediary element absorbs and distributes mechanical stress from vibration and impact, preventing direct transmission of harmful forces to the control circuit while maintaining the compact integrated design

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the control circuit is enclosed in a container, then protection is provided, but the container itself can deform under vibration and impact, still damaging the circuit

Engineering Contradiction:

Improveprotection of control circuitVSAvoiddeformation from vibration and impact

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The protective function is merged with the structural binding plate by forming a recess directly in it. This integration ensures that the protective structure and the mechanical binding function are unified, allowing the same component to provide both structural support and protection against deformation from vibration and impact

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The binding plate is designed with different local qualities: the main body provides rigid structural support for binding the battery stack, while the recess area provides a protected, slightly more compliant space for the control circuit. This local differentiation allows the structure to simultaneously provide strong binding and gentle protection for sensitive components

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3089237B1Power source unit comprising a circuit board

Publication Date: 2022.09.14 GS YUASA INT LTD

Figure 1
Figure 2
Figure 3

AI summary

A power source unit (1) includes a battery main body (470) including at least one battery cell (50), an electric device (6) located on the battery main body (470), and a wall (622a to 622c) located along a lateral side of parts (631) included in the electric device. The wall (622a to 622c) is taller than a height of the parts (631).