Battery assembly

• US 9,184,424 B2
• Filed: 07/08/2013
• Issued: 11/10/2015
• Est. Priority Date: 07/08/2013
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Arena, Anthony, Sanderson, Daniel
• Primary Examiner(s): RHEE, JANE J
• Application Number:
  US13/936,556
• Publication Number:
  US 20150010801A1
• Time in Patent Office: 855 Days
• US Class Current: 1/1
• CPC Class Codes: H01M 10/0486 Frames for plates or membranes
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/647 Prismatic or flat cells, e.g. pouch cells
• CPC Class Codes: H01M 10/6555 arranged between the cells
• CPC Class Codes: H01M 10/6557 arranged between the cells
• CPC Class Codes: H01M 10/6561 Gases
• CPC Class Codes: H01M 50/211 adapted for pouch cells
• CPC Class Codes: H01M 50/291 characterised by their shape
• CPC Class Codes: H01M 50/293 characterised by the material
• CPC Class Codes: H01M 50/503 characterised by the shape of the interconnectors
• CPC Class Codes: H01M 50/569 Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A battery assembly includes a first battery frame assembly having a first plastic frame member and a first thermally conductive plate. The first plastic frame member has a rectangular ring-shaped peripheral wall and a plurality of cross-members. The battery assembly further includes a first thermally conductive plate having peripheral edges encapsulated within the first substantially rectangular ring-shaped peripheral wall. The plate further includes exposed portions configured to contact air passing through a first plurality of channels in the peripheral wall and past the first thermally conductive plate and through a second plurality of channels in the peripheral wall. The battery assembly further includes a first battery cell configured to contact the first thermally conductive plate.

Claims

1. A battery assembly, comprising:

a first battery frame assembly having a first plastic frame member and a first thermally conductive plate;

the first plastic frame member having a first substantially rectangular ring-shaped peripheral wall and a first plurality of cross-members;

the first substantially rectangular ring-shaped peripheral wall having first, second, third and fourth wall portions defining a first central space, the first plurality of cross-members extending between the first and second wall portions and extending across the first central space, the first plurality of cross-members defining a first plurality of open spaces therebetween in the first central space;

the first substantially rectangular ring-shaped peripheral wall further having a first plurality of channels extending into the first wall portion proximate to the first plurality of open spaces, and a second plurality of channels extending into the second wall portion proximate to the first plurality of open spaces;

the first thermally conductive plate having first, second, third and fourth peripheral edges being disposed and encapsulated within the first, second, third and fourth wall portions, respectively, of the first substantially rectangular ring-shaped peripheral wall, the first thermally conductive plate having first and second sides, the first plurality of cross-members being disposed directly on an contacting the first side of the first thermally conductive plate, the first thermally conductive plate further having exposed portions on the first side thereof disposed in the first plurality of open spaces configured to contact air flowing through the first plurality of channels and past the first side of the first thermally conductive plate and through the second plurality of channels to extract heat energy from the first thermally conductive plate;

a first battery cell being disposed directly on and contacting the second side of the first thermally conductive plate;

a second battery cell being disposed directly on and contacting the first battery cell;

a second battery frame assembly being coupled to the first battery frame assembly such that the first and second battery cells are disposed between the first and second battery frame assemblies, the second battery frame assembly having a second plastic frame member and a second thermally conductive plate, the second thermally conductive plate having first, second, third and fourth peripheral edges disposed and encapsulated within the second plastic frame member, the second thermally conductive plate having first and second sides, the first side of the second thermally conductive plate being disposed directly on and contacting the second battery cell such that the first and second battery cells are disposed directly between the first and second thermally conductive plates; and

a second plurality of cross-members of the second plastic frame member being disposed directly on and contacting the second side of the second thermally conductive plate.

2. The battery assembly of claim 1, wherein

the first and second battery cells are further disposed between the first battery frame assembly and the second battery frame assembly, the first plastic frame member being coupled to the second plastic frame member.

3. The battery assembly of claim 1, wherein the second plastic frame member further includes a second substantially rectangular ring-shaped peripheral wall;

the second substantially rectangular ring-shaped peripheral wall having first, second, third and fourth wall portions defining a second central space, the second plurality of cross-members extending between the first and second wall portions of the second substantially rectangular ring-shaped peripheral wall and extending across the second central space, the second plurality of cross-members defining a second plurality of open spaces therebetween in the second central space, the second substantially rectangular ring-shaped peripheral wall further having a first plurality of channels extending into the first wall portion thereof proximate to the second plurality of open spaces, and a second plurality of channels extending into the second wall portion thereof proximate to the second plurality of open spaces.

4. The battery assembly of claim 3, wherein the second thermally conductive plate further having exposed portions disposed in the second plurality of open spaces configured to contact air passing through the first plurality of channels in the first wall portion of the second substantially rectangular ring-shaped peripheral wall and past the second thermally conductive plate and through the second plurality of channels in the second wall portion of the second substantially rectangular ring-shaped peripheral wall to extract heat energy from the second thermally conductive plate.

5. The battery assembly of claim 3, further comprising:

a first bus bar having a first tab portion, a second tab portion, and a first central body;

the first central body of the first bus bar being disposed between the first and second tab portions of the first bus bar; and

the first central body of the first bus bar being disposed within the first substantially rectangular ring-shaped peripheral wall, the first tab portion of the first bus bar extending outwardly from the first substantially rectangular ring-shaped peripheral wall in a first direction, and the second tab portion of the first bus bar extending outwardly from the first substantially rectangular ring-shaped peripheral wall in a second direction perpendicular to the first direction, the first tab portion of the first bus bar being electrically coupled to a first electrical terminal of the first battery cell;

a second bus bar having a first tab portion, a second tab portion, and a first central body;

the first central body of the second bus bar being disposed between the first and second tab portions of the second bus bar; and

the first central body of the second bus bar being disposed within the second substantially rectangular ring-shaped peripheral wall, the first tab portion of the second bus bar extending outwardly from the second substantially rectangular ring-shaped peripheral wall in the first direction, and the second tab portion of the second bus bar extending outwardly from the second substantially rectangular ring-shaped peripheral wall in a third direction opposite of the second direction, the first tab portion of the second bus bar being electrically coupled to a second electrical terminal of the second battery cell.

6. The battery assembly of claim 3, further comprising:

a third battery frame assembly having a third plastic frame member and a third thermally conductive plate;

the third plastic frame member having a third substantially rectangular ring-shaped peripheral wall and a plurality of cross-members;

the third substantially rectangular ring-shaped peripheral wall having first, second, third and fourth wall portions defining a central space, the plurality of cross-members of the third plastic frame member extending between the first and second wall portions of the third substantially rectangular ring-shaped peripheral wall and extending across the central space thereof, the plurality of cross-members of the third plastic frame member defining a plurality of open spaces therebetween in the central space of the third substantially rectangular ring-shaped peripheral wall,

the third substantially rectangular ring-shaped peripheral wall further having a third plurality of channels extending into the first wall portion thereof proximate to the plurality of open spaces defined by the plurality of cross-members of the third plastic frame member, and a fourth plurality of channels extending into the second wall portion thereof proximate to the plurality of open spaces defined by the plurality of cross-members of the third plastic frame member;

the third thermally conductive plate having peripheral edges encapsulated within the third substantially rectangular ring-shaped peripheral wall;

a fourth battery frame assembly having a fourth plastic frame member and a fourth thermally conductive plate, the fourth thermally conductive plate having peripheral edges encapsulated in the fourth plastic frame member; and

third and fourth battery cells disposed between the third battery frame assembly and the fourth battery frame assembly such that the third thermally conductive plate contacts the third battery cell, and the fourth thermally conductive plate contacts the fourth battery cell, the third plastic frame member being coupled between and to the first and fourth plastic frame members.

7. The battery assembly of claim 6, wherein each channel of the first plurality of channels is disposed adjacent to a respective channel of the third plurality of channels, and each channel of the second plurality of channels is disposed adjacent to a respective channel of the fourth plurality of channels;

each respective combination of a channel of the first plurality of channels, a channel of the second plurality of channels, a channel of the third plurality of channels, and a channel of the fourth plurality of channels define a flow path.

8. The battery assembly of claim 2, wherein the first and second plastic frame members have first and second channels, respectively, that extend into the first and second plastic frame members, respectively, that are disposed proximate to one another such that first and second electrical terminals, respectively, of the first and second battery cells, respectively, extend through an aperture formed by the first and second channels.

9. The battery assembly of claim 1, wherein the first wall portion and the second wall portion of the first substantially rectangular ring-shaped peripheral wall being substantially parallel to one another;

the third wall portion and the fourth wall portion of the first substantially rectangular ring-shaped peripheral wall being substantially parallel to one another and substantially perpendicular to the first and second wall portions.

10. The battery assembly of claim 1, further comprising:

a first bus bar have a first tab portion, a second tab portion, and a first central body;

the first central body being disposed between the first and second tab portions; and

the first central body being disposed within the first and third wall portions, the first tab portion extending outwardly from the first wall portion, and the second tab portion extending outwardly from the first wall portion, the first tab portion being electrically coupled to a first electrical terminal of the first battery cell.

11. The battery assembly of claim 1, further comprising:

a first current sense member having a first current sense lead, a second current sense lead, and a central body;

the central body of the first current sense member being disposed between the first and second current sense leads; and

the central body of the first current sense member being disposed within the first and fourth wall portions, the first current sense lead extending outwardly from the first wall portion, and the second current sense lead extending outwardly from the fourth wall portion.

12. The battery assembly of claim 1, wherein the first plurality of cross-members of the first plastic frame member being substantially parallel to one another and substantially perpendicular to the first and second wall portions of the first substantially rectangular ring-shaped peripheral wall.

13. A battery assembly, comprising:

a first battery frame assembly having a first plastic frame member and a first thermally conductive plate;

the first plastic frame member having a first substantially rectangular ring-shaped peripheral wall;

the first substantially rectangular ring-shaped peripheral wall having first, second, third and fourth wall portions defining a first central space;

the first thermally conductive plate having first, second, third and fourth peripheral edges being disposed and encapsulated within the first, second, third and fourth wall portions, respectively, of the first substantially rectangular ring-shaped peripheral wall, the first thermally conductive plate having first and second sides, the first thermally conductive plate further having an exposed portion on the first side thereof disposed in the first central space of the first substantially rectangular ring-shaped peripheral wall configured to contact air flowing past the first side of the first thermally conductive plate to extract heat energy from the first thermally conductive plate;

a first battery cell being disposed on and directly contacting the second side of the first thermally conductive plate;

a second battery cell being disposed on and directly contacting the first battery cell; and

a second battery frame assembly being coupled to the first battery frame assembly such that the first and second battery cells are disposed between the first and second battery frame assemblies;

the second battery frame assembly having a second plastic frame member and a second thermally conductive plate;

the second plastic frame member having a second substantially rectangular ring-shaped peripheral wall;

the second substantially rectangular ring-shaped peripheral wall having first, second, third and fourth wall portions defining a second central space;

the second thermally conductive plate having first, second, third and fourth peripheral edges being disposed and encapsulated within the first, second, third and fourth wall portions, respectively, of the second substantially rectangular ring-shaped peripheral wall, the second thermally conductive plate having first and second sides, the first side of the second thermally conductive plate being disposed on and directly contacting the second battery cell such that the first and second battery cells are disposed directly between the first and second thermally conductive plates.

14. The battery assembly of claim 13, wherein:

the first substantially rectangular ring-shaped peripheral wall having at least a first cross-member extending between and coupled to the first and second wall portions of the first substantially rectangular ring-shaped peripheral wall and extending across the first central space;

the first cross-member being disposed on and directly contacting the first thermally conductive plate;

the first cross-member defining a first open space between the first cross-member and the first wall portion of the first substantially rectangular ring-shaped peripheral wall in the first central space;

the first cross-member further defining a second open space between the first cross-member and the second wall portion of the first substantially rectangular ring-shaped peripheral wall in the first central space;

the first wall portion of the first substantially rectangular ring-shaped peripheral wall having first and second channels extending therein that fluidly communicate with the first and second open spaces, respectively,

the second wall portion of the first substantially rectangular ring-shaped peripheral wall having third and fourth channels extending therein that fluidly communicate with the second open space; and

the first thermally conductive plate having a first exposed portion disposed in the first open space configured to contact air passing through the first and third channels; and

the first thermally conductive plate further having a second exposed portion disposed in the second open space configured to contact air passing through the second and fourth channels to extract heat energy from the first thermally conductive plate.