Battery module having base insulating member

Patent metadata

Field	Value
Publication number	US-2022376355-A1
Application number	US-202017762198-A
Country	US
Kind code	A1
Filing date	Aug 20, 2020
Priority date	Sep 27, 2019
Publication date	Nov 24, 2022
Grant date	—

Abstract

A battery module prevents an electrolyte solution from leaking out in the event of electrolyte solution leakage. To achieve the object, the battery module according to the present disclosure includes at least one cell assembly including a plurality of secondary batteries stacked in a direction, each secondary battery including an electrode lead, a base plate disposed below the cell assembly and extending in a horizontal direction to support a bottom of the cell assembly, and at least one base insulation member interposed between the cell assembly and the base plate and having a receiving portion formed concavely in a downward direction to receive a part of the cell assembly.

First claim

1 . A battery module, comprising:
at least one cell assembly including a plurality of secondary batteries stacked in a stacking direction, each secondary battery including an electrode lead; a base plate disposed below the at least one cell assembly and extending in a horizontal direction to support a bottom of the at least one cell assembly; and at least one base insulation member interposed between the at least one cell assembly and the base plate and having a first receiving portion formed concavely in a downward direction to receive a part of the at least one cell assembly.

2 . The battery module according to claim 1 , further comprising:
a top plate mounted on top of the at least one cell assembly and extending in the horizontal direction to cover a top of the at least one cell assembly; and at least one top insulation member interposed between the at least one cell assembly and the top plate and having a second receiving portion formed concavely in an upward direction to receive a part of the at least one cell assembly.

3 . The battery module according to claim 2 , wherein the base plate includes a compartment portion extending in the upward direction on each of left and right sides at a lower end of the at least one cell assembly.

4 . The battery module according to claim 3 , wherein the base insulation member includes a fixing portion extending leftwards and rightwards from the first receiving portion and extending with at least one bending to cover the compartment portion of the base plate.

5 . The battery module according to claim 4 , wherein the base plate further includes a stopper on an inner side to support a front outer side or a rear outer side of the first receiving portion of the base insulation member.

6 . The battery module according to claim 3 , wherein the battery module further includes a busbar frame disposed on a left or right side of the at least one cell assembly, and having a through-hole through which at least one electrode lead extends, and a busbar assembly mounted on left and right outer sides of the busbar frame and having a conductive metal to electrically connect the plurality of secondary batteries, and
wherein the base insulation member includes a barrier disposed on the compartment portion of the base plate and extending to contact the busbar frame.

7 . The battery module according to claim 1 , wherein the at least one cell assembly includes at least two cell assemblies, and
wherein the base insulation member includes a partition interposed between the at least two cell assemblies.

8 . The battery module according to claim 1 , wherein the base plate includes a receiving groove recessed in the downward direction, and
wherein the base insulation member includes an inner groove which is inserted into the receiving groove.

9 . A battery rack comprising:
at least two battery modules according to claim 1 ; and a rack case to receive the battery modules.

10 . An energy storage system comprising at least two battery racks according to claim 9 .

11 . The battery module according to claim 1 , wherein the base plate includes an upwardly extending compartment portion on each side of the at least one cell assembly,
wherein each compartment portion includes an inner wall, an upper wall and an outer wall, wherein the base insulation member includes a fixing portion covering each compartment portion, and wherein each fixing portion comprises an inner bent portion, an extension portion and an outer bent portion,

12 . The battery module according to claim 11 , wherein the fixing portion further comprises an end structure extending outwardly from the outer bent portion.

Assignees

• Lg Energy Solution Ltd

Inventors

• Gang In-Jae
• Shin Jin-Kyu

Classifications

• H01M50/209 Primary

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/289

  characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) · CPC title

• H01M50/392 Primary

  with means for neutralising or absorbing electrolyte; with means for preventing leakage of electrolyte through vent holes · CPC title

• H01M50/502

  Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title