Secondary battery and battery module including the same
US-2024291122-A1 · Aug 29, 2024 · US
Secondary battery
US2025323398A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025323398-A1 |
| Application number | US-202519055497-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 18, 2025 |
| Priority date | Apr 11, 2024 |
| Publication date | Oct 16, 2025 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A secondary battery includes a battery case, an electrode body housed in the battery case, and a current collector terminal including an outer terminal inserted in a terminal through hole of the battery case and fixed to the battery case via an insulating resin member and an inner terminal formed to be energized to the outer terminal and connected to the electrode body. The current collector terminal is provided with a current interrupt mechanism configured such that when the battery temperature rises above a predetermined temperature, the outer terminal and the inner terminal are separated by the biasing force of a spring member biasing the outer terminal or/and the inner terminal and placed into a de-energized state.
First claim
Opening claim text (preview).
What is claimed is: 1 . A secondary battery comprising: a battery case including a terminal through hole; an electrode body housed in the battery case; and a current collector terminal including: an outer terminal inserted in the terminal through hole of the battery case and fixed to the battery case via an insulating resin member; and an inner terminal connected to the electrode body and formed to be energized to the outer terminal, wherein the current collector terminal is provided with a current interrupt mechanism including a spring member that biases the outer terminal or/and the inner terminal, the current interrupt mechanism being configured such that, when a battery temperature rises above a predetermined temperature, the outer terminal and the inner terminal are separated from each other into a de-energized state by a biasing force of the spring member. 2 . The secondary battery according to claim 1 , wherein the current interrupt mechanism is configured such that, when the battery temperature rises above the predetermined temperature and the insulating resin member melts or softens, the outer terminal is caused to move toward battery outside by the biasing force of the spring member, so that the outer terminal and the inner terminal are placed in the de-energized state. 3 . The secondary battery according to claim 1 , wherein the insulating resin member is a layered insulating resin member including a low-melting point resin member as an intermediate layer of the insulating resin member, the low-melting point resin member having a lower melting point than a melting point of the insulating resin member, and the outer terminal is fixed to the battery case via the layered insulating resin member, and the current interrupt mechanism is configured such that, when the low-melting point resin member melts or softens, the outer terminal is caused to move toward battery outside by the biasing force of the spring member, so that the outer terminal and the inner terminal are placed in the de-energized state. 4 . The secondary battery according to claim 1 , wherein the inner terminal is fixed to either the battery case or the insulating resin member via a low-melting resin member having a lower melting point than the insulating resin member, and the current interrupt mechanism is configured such that, when the low-melting resin member melts or softens, the inner terminal is caused to move toward battery inside by the biasing force of the spring member, so that the outer terminal and the inner terminal are placed in the de-energized state. 5 . The secondary battery according to claim 1 , wherein the inner terminal is joined to the outer terminal with a low-melting point joining member having a lower melting point than a melting point of the insulating resin member, and the current interrupt mechanism is configured such that, when the low-melting point joining member melts or softens, the inner terminal is caused to move toward battery inside by the biasing force of the spring member, so that the outer terminal and the inner terminal are placed in the de-energized state.
Assignees
Inventors
Classifications
Terminals · CPC title
- H01M50/581Primary
in response to temperature · CPC title
Terminals adapted for prismatic, pouch or rectangular cells · CPC title
Spacers; Insulating plates · CPC title
in response to pressure · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2025323398A1 cover?
- A secondary battery includes a battery case, an electrode body housed in the battery case, and a current collector terminal including an outer terminal inserted in a terminal through hole of the battery case and fixed to the battery case via an insulating resin member and an inner terminal formed to be energized to the outer terminal and connected to the electrode body. The current collector te…
- Who is the assignee on this patent?
- Prime Planet Energy & Solutions Inc
- What technology area does this patent fall under?
- Primary CPC classification H01M50/581. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Oct 16 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).