Secondary battery head cover assembly, secondary battery including the same and assembling method thereof

Patent metadata

Field	Value
Publication number	US-10763465-B2
Application number	US-201816167418-A
Country	US
Kind code	B2
Filing date	Oct 22, 2018
Priority date	Mar 28, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

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.

First claim

What is claimed is:

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.

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

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

4. 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.

5. 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.

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

7. 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.

8. 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.

9. 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.

10. 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.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Chi Qingkui
• Zhong kaifu

Classifications

• H01M50/394 Primary

  Gas-pervious parts or elements · CPC title

• H01M50/16

  Organic material · CPC title

• H01M50/627

  Filling ports · CPC title

• H01M50/15 Primary

  for prismatic or rectangular cells (H01M50/153 takes precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title