Fixing battery cells in place by compressed cell fixture

Patent metadata

Field	Value
Publication number	US-10868286-B2
Application number	US-201514625516-A
Country	US
Kind code	B2
Filing date	Feb 18, 2015
Priority date	Feb 19, 2014
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A method for fixing battery cells includes positioning each battery cell in a respective opening of a cell fixture; inserting a first side of each battery cell into a respective opening of a first cell carrier; inserting a second side, opposite to the first side, of each battery cell into a respective opening of a second cell carrier, such that the cell fixture is positioned between the first and second cell carriers; and pressing the first and second cell carriers together to compress the cell fixture.

First claim

What is claimed is:

1. A battery cell block, comprising:
a plurality of battery cells, each battery cell extending in a longitudinal direction;
a first cell carrier of non-conductive material having a first upper surface and a first lower surface, the first lower surface further comprising first openings extending in the longitudinal direction, wherein the first openings are configured to receive for insertion a first side, with respect to the longitudinal direction, of each battery cell and the first upper surface includes first ends opposite the first openings, each first end being closed;
a second cell carrier of non-conductive material having a second upper surface and a second lower surface, the second upper surface further comprising second openings extending in the longitudinal direction, wherein the second upper surface faces the first lower surface and the second openings are configured to receive for insertion a second side, with respect to the longitudinal direction, opposite to the first side, of each battery cell and the second lower surface includes second ends opposite the second openings, each second end being closed; and
a cell fixture located between the first lower surface and the second upper surface cell fixture being made of a compressible material and configured to be in a compressed state that is created when the first and second cell carriers are coupled together to compress the cell fixture on opposite sides of the cell fixture such that the compressible material expands to firmly enclose every single cell and to fix the cells in place, and the cell fixture having third openings, each of the third openings accommodating a center portion of one battery cell in the longitudinal direction.

2. The cell block according to claim 1 , wherein the cell fixture includes a foam material that is compressed.

3. The cell block according to claim 1 , wherein the cell fixture is made of polyurethane.

4. The cell block according to claim 1 , wherein the first and second cell carriers are fastened to each other.

5. The cell block according to claim 4 , wherein the first and second cell carriers are fastened to each other by screwing, soldering, riveting, gluing, or clipping.

6. The cell block according to claim 5 , wherein the first and second cell carriers are fastened to each other by screws inserted in respective screw openings on the first and second cell carriers.

7. The cell block according to claim 1 , wherein the first cell carrier and the second carrier both contact the cell fixture when the first and second cell carriers are coupled together.

8. The cell block according to claim 7 , wherein the cell fixture comprises:
a first cell fixture end contacting the first lower surface of the first cell carrier; and a second cell fixture end contacting the second upper surface of the second cell carrier.

9. The cell block according to claim 1 , wherein the second cell carrier comprises first and second terminals configured to enable an electrical connection.

10. The cell block according to claim 9 , wherein the first and second terminals are configured to enable passage of a coolant to and from the cell block.

11. The cell block according to claim 1 , wherein the second cell carrier comprises first and second terminals configured to enable passage of a coolant to and from the cell block.

12. The cell block according to claim 1 , wherein the cell fixture expands in a plane orthogonal to the longitudinal direction when in the compressed state.

13. A battery cell block, comprising:
a plurality of battery cells, each battery cell extending in a longitudinal direction;
a first cell carrier of non-conductive material having a first upper surface and a first lower surface, the first lower surface further comprising first openings extending in the longitudinal direction, wherein the first openings are configured to receive for insertion a first side, with respect to the longitudinal direction, of each battery cell and the first upper surface includes first ends opposite the first openings, each first end having an opening with a radius smaller than the radius of the respective first opening;
a second cell carrier of non-conductive material having a second upper surface and a second lower surface, the second upper surface further comprising second openings extending in the longitudinal direction, wherein the second upper surface faces the first lower surface and the second openings are configured to receive for insertion a second side, with respect to the longitudinal direction, opposite to the first side, of each battery cell and the second lower surface includes second ends opposite the second openings, each second end having an opening with a radius smaller than the radius of the respective second opening; and
a cell fixture located between the first lower surface and the second upper surface cell fixture being made of a compressible material and configured to be in a compressed state that is created when the first and second cell carriers are coupled together to compress the cell fixture on opposite sides of the cell fixture such that the compressible material expands to firmly enclose every single cell and to fix the cells in place, and the cell fixture having third openings, each of the third openings accommodating a center portion of one battery cell in the longitudinal direction.

14. The cell block according to claim 13 , wherein the cell fixture includes a foam material that is compressed.

15. The cell block according to claim 13 , wherein the cell fixture is made of polyurethane.

16. The cell block according to claim 13 , wherein the and second cell carriers are fastened to each other.

17. The cell block according to claim 13 , wherein the battery cells do not extend past the first ends or the second ends in the longitudinal direction.

18. The cell block according to claim 13 , wherein the first cell carrier and the second carrier both contact the cell fixture when the first and second cell carriers are coupled together.

19. The cell block according to claim 18 , wherein the cell fixture comprises:
a first cell fixture end contacting the first lower surface of the first cell carrier; and a second cell fixture end contacting the second upper surface of the second cell carrier.

20. The cell block according to claim 13 , wherein the second cell carrier comprises first and second terminals configured to enable an electrical connection and passage of a coolant to and from the cell block.

Assignees

• Draexlmaier Lisa Gmbh

Inventors

• Hofer Guido
• Faltermeier Peter

Classifications

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M50/262

  with fastening means, e.g. locks · CPC title

• H01M50/293 Primary

  characterised by the material · CPC title

• H01M50/264

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title

• H01M50/227

  Organic material · CPC title