# US 2021/0175554 A1 · Battery pack and method of disassembling the battery pack

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- Number: US 2021/0175554 A1
- Document ID: US20210175554A1
- Status: Published application
- Kind: A1
- Application number: 17/090,840
- Filed: 2020-11-05
- Published: 2021-06-10
- Earliest claimed: 2019-12-06
- Assignees: Toyota Jidosha Kabushiki Kaisha; Subaru Corporation
- Applicants: Toyota Jidosha Kabushiki Kaisha; Subaru Corporation
- Inventors: Hiroshi OKIGA; Satoru SEYAMA
- Web page: https://patentgrep.com/patent/US20210175554A1

## CPC

- H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries}
- H01M 10/54: Reclaiming serviceable parts of waste accumulators
- H01M 50/147: Lids or covers
- H01M 50/183: Sealing members
- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- H01M 50/271: Lids or covers for the racks or secondary casings
- H01M 50/284: with incorporated circuit boards, e.g. printed circuit boards [PCB]
- Y02E 60/10: Energy storage using batteries
- Y02W 30/84: Recycling of batteries or fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A battery pack may include a tray, a cover, a connection member connecting a peripheral portion of the tray to a peripheral portion of the cover with a clearance provided therebetween, and a sealant filling the clearance. The connection member may include a spacer disposed in a range between the peripheral portion of the tray and the peripheral portion of the cover. The spacer may include first to third portions respectively having first to third cross-sectional areas. The second cross-sectional area may be smaller than the first and third cross-sectional areas. The first portion may be disposed at a position that is in contact with the peripheral portion of the tray. The third portion may be disposed at a position that is in contact with the peripheral portion of the cover. The second portion may be disposed between the first portion and the third portion.

## Claims

### Claim 1

A battery pack comprising:
a tray comprising a peripheral portion;
a cover covering the tray and comprising a peripheral portion that faces the peripheral portion of the tray;
a connection member connecting the peripheral portion of the tray and the peripheral portion of the cover to each other with a clearance provided between the peripheral portion of the tray and the peripheral portion of the cover; and
a sealant filling the clearance,
wherein
the connection member comprises a spacer disposed in a range between the peripheral portion of the tray and the peripheral portion of the cover in a direction along which the tray and the cover are stacked,
the spacer comprises a first portion having a first cross-sectional area in a cross section of the spacer along a plane parallel to the clearance, a second portion having a second cross-sectional area in a cross section of the spacer along a plane parallel to the clearance, and a third portion having a third cross-sectional area in a cross section of the spacer along a plane parallel to the clearance,
the second cross-sectional area is smaller than the first cross-sectional area and the third cross-sectional area,
the first portion is disposed at a position that is in contact with the peripheral portion of the tray,
the third portion is disposed at a position that is in contact with the peripheral portion of the cover, and
the second portion is disposed between the first portion and the third portion.

### Claim 2 (depends on 1)

The battery pack of claim 1, wherein a recess is provided in a side surface of the spacer in a range of the second portion.

### Claim 3 (depends on 2)

The battery pack of claim 2, wherein the recess is exposed at a portion of the side surface, the portion extending from inside to outside of the battery pack.

### Claim 4 (depends on 1)

A method of disassembling the battery pack of claim 1, the method comprising cutting the spacer and the sealant by inserting a saw into the clearance and moving the inserted saw along the clearance.