# US 10,763,465 B2 · Secondary battery head cover assembly, secondary battery including the same and assembling method thereof

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- Number: US 10,763,465 B2
- Document ID: US10763465B2
- Status: Granted
- Kind: B2
- Application number: 16/167,418
- Filed: 2018-10-22
- Published: 2019-02-21
- Granted: 2020-09-01
- Earliest claimed: 2016-03-28
- Assignees: Contemporary Amperex Technology Co., Limited
- Applicants: Contemporary Amperex Technology Co., Limited
- Inventors: Qingkui Chi; Kaifu Zhong
- Web page: https://patentgrep.com/patent/US10763465B2

## CPC

- H01M 50/394: {Gas-pervious parts or elements}
- H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence)
- H01M 50/16: Organic material
- H01M 50/627: Filling ports
- Y02E 60/10: Energy storage using batteries
- 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

## Abstract

The present application relates to a secondary battery, including a naked battery core and a secondary battery head cover assembly. The secondary battery head cover assembly includes a head cover and an insulation structure. The insulation structure includes a top connection sheet and two naked battery core insulation sheets, and the two naked battery core insulation sheets are connected to two long sides of the top connection sheet, respectively. The top connection sheet is located below the head cover. The naked battery core is located below the top connection sheet. The head cover is provided with an explosion-proof valve, the top connection sheet is provided with an explosion-proof valve air hole, and the explosion-proof valve air hole is provided correspondingly below the explosion-proof valve.

## Claims

### Claim 1

A secondary battery, comprising a naked battery core and a secondary battery head cover assembly,
wherein the secondary battery head cover assembly comprises a head cover and an insulation structure,
wherein the insulation structure comprises a top connection sheet and two naked battery core insulation sheets, and the two naked battery core insulation sheets are connected to two long sides of the top connection sheet, respectively,
the top connection sheet is located below the head cover, and
the naked battery core is located below the top connection sheet, and
the head cover is provided with an explosion-proof valve, the top connection sheet is provided with an explosion-proof valve air hole, and the explosion-proof valve air hole is provided correspondingly below the explosion-proof valve,
wherein each of the two naked battery core insulation sheets comprises a main insulation region directly connected with the top connection sheet and a bottom insulation region formed by extending the main insulation region outward along a side away from the top connection sheet, the two main insulation regions cover two main side surfaces of the naked battery core, respectively, the bottom insulation region covers a bottom surface of the naked battery core, and the bottom insulation region is provided with an electrolyte permeation hole.

### Claim 2 (depends on 1)

The secondary battery according to claim 1, wherein, the two naked battery core insulation sheets cover the naked battery core.

### Claim 3 (depends on 1)

The secondary battery according to claim 1, wherein, the two naked battery core insulation sheets have identical structures.

### Claim 4 (depends on 1)

The secondary battery according to claim 1, wherein, the two main insulation regions completely cover the two main side surfaces of the naked battery core, respectively.

### Claim 5 (depends on 1)

The secondary battery according to claim 1, wherein, each of the two naked battery core insulation sheets further comprises a side insulation region formed by extending the main insulation region outward along two lateral sides perpendicular to the long side, and
the side insulation region covers a narrow side surface of the naked battery core.

### Claim 6 (depends on 1)

The secondary battery according to claim 1, wherein, the top connection sheet is connected with the head cover.

### Claim 7 (depends on 1)

The secondary battery according to claim 1, wherein, an electrode pole is provided on the head cover, and an electrode pole through hole is provided at a position on the top connection sheet corresponding to the electrode pole.

### Claim 8 (depends on 1)

The secondary battery according to claim 1, wherein, the head cover is further provided with a liquid injection hole, and the top connection sheet is further provided with a liquid injection through hole, and
wherein, the liquid injection through hole is provided correspondingly below the liquid injection hole.

### Claim 9 (depends on 1)

The secondary battery according to claim 1, wherein, the top connection sheet and the two naked battery core insulation sheets are integrated as a whole.

### Claim 10 (depends on 1)

The secondary battery according to claim 1, wherein, the head cover is further provided with a reversing sheet, and the top connection sheet is further provided with a reversing sheet air hole, and
wherein, the reversing sheet air hole is provided correspondingly below the reversing sheet.