Power Storage Module Injection Frame Layout for Compact Stacking

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Solution Overview

Problem

The provision of a frame at the periphery of a liquid injection port in a power storage module leads to an increase in size in the stacking direction, which is undesirable when assembling the module into a power storage device.

Innovation Solution

The power storage module incorporates a liquid injection frame that protrudes differently on both sides in the stacking direction, with one side protruding more than the other, preventing significant facing of parts and minimizing the overall size increase when assembled.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a frame is provided at the periphery of a liquid injection port to secure airtightness, then sealing performance is improved, but the size of the power storage module in the stacking direction increases

Engineering Contradiction:

Improvesealing performanceVSAvoidsize in stacking direction

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The liquid injection frame is designed with asymmetric protrusion: one end protrudes more in the stacking direction than the other end. This asymmetric configuration allows the frame to provide adequate sealing at the liquid injection port while minimizing the overall increase in module size in the stacking direction, resolving the contradiction between sealing performance and compact dimensions.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The liquid injection frame provides localized sealing only at the specific location where the liquid injection port is positioned, rather than uniformly increasing the size of the entire module. This localized approach ensures airtightness at the critical interface without unnecessarily increasing the overall module dimensions in the stacking direction.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If modules with locally different thicknesses are stacked to form a power storage device, then assembly flexibility is improved, but the overall device size in the stacking direction increases due to required intervals between modules

Engineering Contradiction:

Improveassembly flexibilityVSAvoiddevice size in stacking direction

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

By making the liquid injection frame asymmetric with different protrusion amounts at each end, adjacent modules can be stacked with offset configurations. This reduces the required intervals between modules and minimizes the overall device size in the stacking direction while maintaining assembly flexibility.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS20260094943A1Power storage module and power storage device

Publication Date: 2026.04.02 TOYOTA INDUSTRIES CORP

AI summary

A power storage module includes a main body portion provided with communication paths, and a liquid injection portion that is attached to one side surface of the main body portion and includes injection ports each communicating with the communication paths. Liquid injection frames provided in the main body portion include a first liquid injection frame in which a part of the liquid injection frame protrudes from the main body portion to at least one side in the first direction, and a second liquid injection frame in which a part of the liquid injection frame protrudes from the main body portion to at least the other side in the first direction.