Power Storage Module Insulation Segmentation for Signal Delay Reduction

Solution Overview

Problem

Conventional power storage systems experience increased communication delay due to high withstand voltage requirements for insulation elements, which necessitates the use of special insulation elements and affects system efficiency.

Innovation Solution

A power storage system design that reduces the withstand voltage of insulation elements by using a first insulation unit with a primary and secondary side, outputting signals referenced to a standard voltage between the voltage ends of the power storage modules, and a management device with a second insulation unit, allowing for efficient signal transmission without multiple insulation layers, thereby reducing communication delay.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a high withstand voltage insulation element is used to match the system voltage of series-connected power storage modules, then the insulation reliability is improved, but the communication delay increases due to the need for special insulation elements

Engineering Contradiction:

Improveinsulation reliabilityVSAvoidcommunication delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The insulation function is segmented into multiple stages: first insulation unit at the module level and second insulation unit at the management device level. This segmentation allows each insulation unit to handle only a portion of the total voltage, enabling the use of standard insulation elements with lower withstand voltage ratings while maintaining overall insulation reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A standard voltage (ground potential) is introduced as an intermediary reference potential between the high-voltage power storage modules and the management device. This intermediary reference allows signal transmission to be referenced to a stable potential, reducing the voltage difference that insulation elements must withstand and enabling the use of standard insulation elements.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a high withstand voltage insulation element is used, then the insulation reliability is improved, but typical insulation elements cannot be used instead of special ones

Engineering Contradiction:

Improveinsulation reliabilityVSAvoidease of manufacture

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The insulation function is segmented into multiple stages: first insulation unit at the module level and second insulation unit at the management device level. This segmentation allows each insulation unit to handle only a portion of the total voltage, enabling the use of standard insulation elements with lower withstand voltage ratings while maintaining overall insulation reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A standard voltage (ground potential) is introduced as an intermediary reference potential between the high-voltage power storage modules and the management device. This intermediary reference allows signal transmission to be referenced to a stable potential, reducing the voltage difference that insulation elements must withstand and enabling the use of standard insulation elements.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If multiple insulation interfaces are used for communication, then the insulation reliability is improved, but the communication cycle lengthens

Engineering Contradiction:

Improveinsulation reliabilityVSAvoidcommunication efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The insulation function is segmented into multiple stages: first insulation unit at the module level and second insulation unit at the management device level. This segmentation allows each insulation unit to handle only a portion of the total voltage, enabling the use of standard insulation elements with lower withstand voltage ratings while maintaining overall insulation reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A standard voltage (ground potential) is introduced as an intermediary reference potential between the high-voltage power storage modules and the management device. This intermediary reference allows signal transmission to be referenced to a stable potential, reducing the voltage difference that insulation elements must withstand and enabling the use of standard insulation elements.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11056724B2Power storage system

Publication Date: 2021.07.06 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

In a power storage system, each of a plurality of power storage modules includes at least one cell, and the plurality of power storage modules are connected in series. A management device manages the plurality of power storage modules. Each of the plurality of power storage modules contains a first insulation unit having a primary side and a secondary side that are insulated from each other. The first insulation unit outputs a signal containing information of at least one cell to a communication line. The signal is referenced to predetermined standard voltage between a voltage at one end and a voltage at the other end of the plurality of power storage modules. The management device contains a second insulation unit having a primary side and a secondary side that are insulated from each other, and a circuit unit insulated from the communication line by the second insulation unit.