Battery pack

Patent metadata

Field	Value
Publication number	US-2025030092-A1
Application number	US-202418744234-A
Country	US
Kind code	A1
Filing date	Jun 14, 2024
Priority date	Jul 21, 2023
Publication date	Jan 23, 2025
Grant date	—

Abstract

A battery pack includes a base plate in which two or more battery cells are in contact with a first surface of the base plate and a base flow path through which a refrigerant that cools the battery cell circulates is in the base plate; and a frame portion in which a two or more frames are coupled to each other at an upper side of the first surface of the base plate to form an accommodation space for accommodating the battery cells and a side surface flow path through which the refrigerant flows in and out by being connected to the base flow path is formed therein.

First claim

What is claimed is:

1 . A battery pack comprising:
a plurality of battery cells; a base plate comprising a first surface and a base flow path, wherein the plurality of battery cells is in contact with the first surface and the base flow path is configured to circulate a refrigerant to cool the plurality of battery cells; and a frame portion comprising a plurality of frames coupled to each other at an upper side of the first surface of the base plate, the frame portion forming an accommodation space for accommodating the plurality of battery cells and a side surface flow path connected to the base flow path through which the refrigerant is configured to flow.

2 . The battery pack as claimed in claim 1 , wherein the base plate comprises:
a cooling plate comprising the first surface and the base flow path; a flow path connection portion coupled to one end of the cooling plate and connecting the side surface flow path of the frame portion and the base flow path; and a refrigerant guiding portion coupled to another end of the cooling plate, the refrigerant guiding portion being configured to guide a flow of the refrigerant introduced into the base flow path in a discharge direction through the flow path connection portion.

3 . The battery pack as claimed in claim 2 , wherein:
the base flow path comprises an inflow flow path through which the refrigerant introduced through the flow path connection portion moves in a first direction inside the cooling plate and a discharge flow path in which a flow direction of the refrigerant introduced through the inflow flow path is reversed at a position of the refrigerant guiding portion to move in a second direction opposite to the first direction, the inflow flow path extends along the first direction inside one side of the cooling plate to introduce the refrigerant and is connected to the discharge flow path at the position of the refrigerant guiding portion, and the discharge flow path is connected to the inflow flow path inside the cooling plate.

4 . The battery pack as claimed in claim 3 , further comprising a first coupling groove at the one end of the cooling plate coupled to the flow path connection portion, the first coupling groove opening a portion of each of the inflow flow path and the discharge flow path.

5 . The battery pack as claimed in claim 4 , wherein the flow path connection portion comprises:
a first connection portion coupled to the one end of the cooling plate to connect the inflow flow path to the side surface flow path of the frame portion; and a second connection portion coupled to the one end of the cooling plate to connect the discharge flow path to the side surface flow path of the frame portion.

6 . The battery pack as claimed in claim 5 , wherein:
the first connection portion comprises a first bending plate including one side covering the first coupling groove and another side extending in a thickness direction of the cooling plate, and a first pipe line protruding from an upper side of the first bending plate and extending into the frame portion and connecting the inflow flow path and the side surface flow path, and the second connection portion comprises a second bending plate including one side covering the first coupling groove and another side extending in the thickness direction of the cooling plate, and a second pipe line protruding from an upper side of the second bending plate and extending into the frame portion and connecting the inflow flow path and the side surface flow path.

7 . The battery pack as claimed in claim 4 , further comprising a second coupling groove at another end of the cooling plate, the second coupling groove being coupled to the refrigerant guiding portion and opening a portion of each of the inflow flow path and the discharge flow path.

8 . The battery pack as claimed in claim 7 , wherein the refrigerant guiding portion comprises a second bending plate including one side covering the second coupling groove and another side extending in a thickness direction of the cooling plate.

9 . The battery pack as claimed in claim 6 , wherein the frame portion comprises:
a composite frame coupled to one edge of the base plate, wherein a first side surface flow path is inside the composite frame and the first side surface flow path is connected to the first connection portion and the second connection portion to supply the refrigerant; an end frame coupled to the another edge of the base plate; a first side frame having each end connected to one end of each of the composite frame and the end frame; and a second side frame having each end connected to another end of each of the composite frame and the end frame.

10 . The battery pack as claimed in claim 9 , further comprising a gas discharge portion in the composite frame configured to discharge a gas generated from one of the plurality of battery cells, wherein the gas discharge portion comprises a gas inflow portion on a first side surface of the composite frame and through which the gas generated from the one of the plurality of battery cells is introduced and a gas venting portion at the composite frame through which the gas introduced into the gas inflow portion is discharged to the outside.

11 . The battery pack as claimed in claim 10 , wherein an inside of the composite frame is divided into a first region and a second region, wherein the first side surface flow path is at the first region, and wherein the gas venting portion is at the second region.

12 . The battery pack as claimed in claim 11 , wherein the gas venting portion comprises:
a venting unit protruding from a second side surface facing the first side surface of the composite frame, the venting unit being configured to discharge the gas; and a guiding portion protruding from an inner wall surface of the second region inside the composite frame, the guiding portion being configured to guide the gas toward the venting unit.

13 . The battery pack as claimed in claim 9 , wherein the frame portion further comprises a side surface cooling frame in contact with side surfaces of the plurality of battery cells.

14 . The battery pack as claimed in claim 13 , wherein one side of the side surface cooling frame is connected to the first side surface flow path of the composite frame, wherein another side of the side surface cooling frame extends in a direction toward the end frame, and wherein a second side surface flow path through which the refrigerant flows is inside the side surface cooling frame.

15 . The battery pack as claimed in claim 14 , wherein the first side surface flow path comprises an upper flow path connected to the first pipe line and a lower flow path connected to the second pipe line, and wherein the second side surface flow path comprises a side surface upper flow path extending in a length direction inside the side surface cooling frame and connected to the upper flow path of the composite frame and a side surface lower flow path extending in the length direction inside the side surface cooling frame and at a lower portion of the side surface upper flow path to be connected to the lower flow path of the composite frame.

16 . The battery pack as claimed in claim 15 , further comprising a side surface refrigerant guiding portion at another side of the side surface cooling frame, wherein the side surface refrigerant guiding portion is configured to change a flow direction of the refrigerant flowing through the side surface upper flow path to a direction of the side surface lower flow path.

17 . The battery pack as claimed in

Assignees

• Samsung Sdi Co Ltd

Inventors

• Moon Soodeok
• Ji Taeho
• Woo Beomjun

Classifications

• H01M10/6554

  Rods or plates · CPC title

• H01M10/6556 Primary

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• H01M10/625

  Vehicles · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/209

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