Power Storage Device Insulating Plate with Integrated Liquid Receiving Portion
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Solution Overview
Problem
Power storage devices with stacked modules face the challenge of electrolytic solution leakage, which needs to be suppressed to ensure device integrity and functionality.
Innovation Solution
A power storage device configuration that includes a power storage module with a pressure adjustment valve, an insulating plate with a liquid receiving portion integrally formed with the main body, and a drainage nozzle to collect and manage the electrolytic solution, preventing leakage by ensuring insulation and efficient drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure adjustment valve is provided on the power storage module to release internal pressure, then the reliability of the power storage module is improved, but the risk of electrolytic solution leakage to the outside increases
Solution Approach 1:
The insulating plate serves as an intermediary component between the power storage module and the external environment. It includes a liquid receiving portion that intercepts electrolytic solution discharged from the pressure adjustment valve, preventing direct leakage to the outside. The insulating plate with its integrated liquid receiving portion acts as a mediator that captures and contains the harmful fluid before it can cause damage externally.
Solution Approach 2:
The system converts the potentially harmful electrolytic solution leakage into a controlled and contained event. By positioning the liquid receiving portion at the discharge location, the harmful discharge is redirected and contained within the insulating plate structure, transforming an uncontrolled leakage problem into a managed fluid collection system that prevents external damage.
2Ease of manufacture
If separate components are used for insulation and liquid reception, then the ease of manufacture is improved, but the reliability is worsened due to potential leakage at boundary portions
Solution Approach 1:
The insulating plate and liquid receiving portion are integrated into a single unified component. The liquid receiving portion is formed as an integral part of the insulating plate structure, eliminating separate assembly interfaces and potential leakage points. This merging of functions into one component ensures both insulation and liquid containment while maintaining manufacturing efficiency through single-piece fabrication.
Data Source
AI summary
A power storage device includes a power storage module, a pair of current collector plates configured to be stacked to interpose the power storage module in a first direction that is vertical, a pair of insulating plates configured to be stacked to interpose the power storage module and the pair of current collector plates in the first direction; and a pair of restraint plates configured to be stacked to interpose the power storage module, the pair of current collector plates, and the pair of insulating plates in the first direction. The power storage module is configured to include an accommodation space that accommodates an electrolytic solution together with a power generation element. A pressure adjustment valve communicating with the accommodation space is provided on a side surface of the power storage module. The insulating plate arranged on a lower side in the first direction with respect to the power storage module is configured to include a main body portion arranged between the current collector plate and the restraint plate, and a liquid receiving portion that is provided on an outer edge portion of the main body portion, is arranged at least at a position corresponding to the pressure adjustment valve when viewed from the first direction, and stores the electrolytic solution discharged from the power storage module. The main body portion and the liquid receiving portion are integrally formed.