Cooling Arrangement for an Energy Storage Device

Patent metadata

Field	Value
Publication number	US-2017324125-A1
Application number	US-201615145227-A
Country	US
Kind code	A1
Filing date	May 3, 2016
Priority date	May 3, 2016
Publication date	Nov 9, 2017
Grant date	—

Abstract

A battery pack includes a thermally conductive plate that can be cooled or heated, and an array of electrochemical cells. The cells include a stacked or rolled arrangement of electrode plates, and a current collector disposed in the battery cell that forms an electrical connection with the electrode plates and provides a thermal conduction pathway for conducting heat from the electrode plates to the thermally conductive plate.

First claim

What is claimed is,:

1 . An electrochemical cell comprising
a polyhedronal cell housing formed of a flexible laminate material, the cell housing including a first end, a second end opposed to the first end, and a multi-sided sidewall that extends between the first end and the second end, an electrode assembly disposed in the cell housing, the electrode assembly including a positive electrode plate, a negative electrode plate and a separator, the positive electrode plate stacked with the negative electrode plate, the separator disposed between the positive electrode plate and the negative electrode plate, the electrode assembly including a stack axis that extends in parallel to a stacking direction of the positive electrode plate, the negative electrode plate and the separator, the stack axis extending perpendicular to the cell housing first and second ends, a current collector disposed in the cell housing, the current collector comprising
a collection portion disposed between the electrode assembly and one side of the multi-sided sidewall, the collection portion extending parallel to the one side and being electrically and thermally connected to one of the positive electrode plate and the negative electrode plate, and
a fin portion that is electrically and thermally connected to the collection portion and extends in a direction parallel to the second end, and
a terminal disposed on the outside of the cell housing so as to overlie the one side, the terminal being electrically and thermally connected to the collection portion.

2 . The electrochemical cell of claim 1 , wherein the fin portion is disposed outside the cell housing and overlies the second end.

3 . The electrochemical cell of claim 2 , wherein a first end of the terminal is connected to the collection portion and a second end of the terminal is connected to the fin portion, and the second end is opposed to the first end.

4 . The electrochemical cell of claim 1 , wherein the fin portion is disposed inside the cell housing between the electrode assembly and the second end.

5 . The electrochemical cell of claim 4 , wherein the terminal is connected to a second end of the collection portion and the fin portion is connected to a first end of the collection portion, and the second end is opposed to the first end.

6 . The electrochemical cell of claim 4 , wherein the terminal is connected to the collection portion via an opening in the one side.

7 . The electrochemical cell of claim 1 , wherein
the current collector is a positive current collector and is electrically and thermally connected to the positive electrode plate, and the electrochemical cell comprises a negative current collector disposed in the cell housing, the negative current collector comprising,
a collection portion disposed between the electrode assembly and the sidewall, the collection portion extending parallel to the sidewall and being electrically and thermally connected to the negative electrode plate, and
a fin portion that is electrically and thermally to the collection portion and extends in a direction parallel to the second end, and
the positive current collector and the negative current collector each exit the cell housing at the first end.

8 . The electrochemical cell of claim 1 , wherein the current collector has a dimension in a direction that is transverse to the stack axis and parallel to the one side, and the dimension is in a range of 30 percent to 98 percent of a corresponding dimension of the one side.

9 . The electrochemical cell of claim 1 , wherein the current collector provides two thermal conduction pathways between the one of the positive electrode plate and the negative electrode plate and an exterior of the cell housing.

10 . A battery pack comprising
a thermally-conductive plate configured to provide one of heating and cooling, electrochemical cells supported on the thermally-conductive plate, each cell including
a polyhedronal cell housing formed of a flexible laminate material, the cell housing including a first end, a second end opposed to the first end and facing the thermally-conductive plate, and a multi-sided sidewall that extends between the first end and the second end,
an electrode assembly disposed in the, cell housing, the electrode assembly including a positive electrode plate, a negative electrode plate and a separator, the positive electrode plate stacked with the negative electrode plate, the separator disposed between the positive electrode plate and the negative electrode plate, the electrode assembly including a stack axis that extends in parallel to a stacking direction of the positive electrode plate, the negative electrode plate and the separator, the stack axis extending perpendicular to the cell housing first and second ends,
a current collector disposed in the cell housing, the current collector comprising
a collection portion disposed between the electrode assembly and one side of the multi-sided sidewall, the collection portion extending parallel to the one side and being electrically and thermally connected to one of the positive electrode plate and the negative electrode plate, and
a fin portion that is electrically and thermally connected to the collection portion and extends in a direction parallel to the second end, and

a terminal disposed on the outside of the cell housing so as to overlie the one side, the terminal being electrically and thermally connected to the collection portion.

11 . The electrochemical cell of claim 10 , wherein the fin portion is disposed outside the cell housing and overlies the second end.

12 . The electrochemical cell of claim 11 , wherein a first end of the terminal is connected to the collection portion and a second end of the terminal is connected to the fin portion, and the second end is opposed to the first end.

13 . The electrochemical cell of claim 10 , wherein the fin portion is disposed inside the cell housing between the electrode assembly and the second end.

14 . The electrochemical cell of claim 13 , wherein the terminal is connected to a first end of the collection portion and the fin portion is connected to a second end of the collection portion, and the second end is opposed to the first end.

15 . The electrochemical cell of claim 13 , wherein the terminal is connected to the collection portion via an opening in the one side.

16 . The electrochemical cell of claim 10 , wherein
the current collector is a positive current collector and is electrically and thermally connected to the positive electrode plate, and the electrochemical cell comprises a negative current collector disposed in the cell housing, the negative current collector comprising
a collection portion disposed between the electrode assembly and another side of the multi-sided sidewall, the collection portion extending parallel to the sidewall and being electrically and thermally connected to the negative electrode plate, and
a fin portion that is electrically and thermally to the collection portion and extends in a direction parallel to the second end, and
the positive current collector and the negative current collector each exit the cell housing at the first end.

17 . The electrochemical cell of claim 10 , wherein the current collector has a dimension in a direction that is transverse to the stack axis and parallel to the one side, and the dimension is in a range of 30 percent to 98 percent of a corresponding dimension of the one side.

18 . The electrochemical cell of claim 10 , wherein the current collector

Assignees

• Bosch Battery Systems Llc
• Bosch Gmbh Robert

Inventors

• Schoenherr Robert
• Kotik Mark

Classifications

• H01M50/136

  Flexibility or foldability · CPC title

• H01M50/548

  on opposite sides of the cell · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/533

  characterised by the shape of the leads or tabs · CPC title