CA2761758C - Battery unit - Google Patents

Battery unit Download PDF

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Publication number
CA2761758C
CA2761758C CA2761758A CA2761758A CA2761758C CA 2761758 C CA2761758 C CA 2761758C CA 2761758 A CA2761758 A CA 2761758A CA 2761758 A CA2761758 A CA 2761758A CA 2761758 C CA2761758 C CA 2761758C
Authority
CA
Canada
Prior art keywords
battery unit
predetermined angle
degrees
cells
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CA2761758A
Other languages
French (fr)
Other versions
CA2761758A1 (en
Inventor
Alex Thaler
Ralph Wunsche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung SDI Co Ltd
Original Assignee
Magna Steyr Battery Systems GmbH and Co OG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Magna Steyr Battery Systems GmbH and Co OG filed Critical Magna Steyr Battery Systems GmbH and Co OG
Publication of CA2761758A1 publication Critical patent/CA2761758A1/en
Application granted granted Critical
Publication of CA2761758C publication Critical patent/CA2761758C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30Arrangements for facilitating escape of gases
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0413Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/64Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647Prismatic or flat cells, e.g. pouch cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6554Rods or plates
    • H01M10/6555Rods or plates arranged between the cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

A battery unit (1) with a stack (2) of flat cells (3), with metal cooling sheets (4) between the cells, which have at least one bended edge (5), with the edges (5) of adjacent metal cooling sheets (4) aligned in the same direction and with the bending partially overlapping in order to form die gaps (6) which are also aligned in the same direction

Description

Battery Unit Field of the Invention The present invention relates to a battery unit that contains a stack of flat cells, between which metal sheets are placed. Each metal sheet has at least one angled edge.
Background A similar battery unit is, for example, described in DE 10 2008 016 936 A2.
There, the edges of the metal cooling sheets are bent at 90 degrees in order to cover the cells in a form-fitting way and to thereby provide a connection to a heat sink.
Battery units of this type can create levels of pressure inside the cells through overheating, short circuits, or other electrical incidents that cause the cells to burst and subsequently leak the gas that was created in the cells. This process can even lead to the formation of flames. If the flames spread to an adjacent cell, that cell may also overheat, resulting in a chain reaction that can pose a serious safety risk.
Summary of the Invention The goal of this invention is to create a battery unit inside of which the respective cells are better protected against gas leaks and flames.
This goal is achieved through a battery unit of the aforementioned type, which however, according to the invention, is characterized by adjacent metal cooling sheets having their edges angled in the same direction. Furthermore, these edges partially overlap in order to form die gaps, which are aligned in the same direction.
Thanks to these design features, any gas escaping from a cell is deflected to the side and diverted away from any adjacent - and any opposite - cells, so that these cells are effectively protected from the gases or flames emanating from a single faulty cell.

This setup reduces the risk of a chain reaction and, as a result, enables the production of low-cost battery units with considerably enhanced levels of operating safety.
The angle of the bend is preferably greater than or equal to 45 degrees and smaller than 90 degrees. Most preferably, the angle is between about 70 degrees and 85 degrees in order to form a die gap that points as far as possible sideways.
When the battery unit is situated next to at least two adjacent stacks of cells, then the edges inside the battery unit are aligned in the same direction, especially if viewed in three dimensions, in order to protect the respectively opposite stack. In a particular variation of the invention, when the battery unit has at least two adjacent stacks of cells, edges that are opposite to each other in the battery unit are angled in the same direction or in a mirror-symmetric way in order to protect the respectively opposite stack.
Furthermore, the edge design of the present invention creates the possibility to curl the metal cooling sheets in an area close to the edges, so that the cells are protected against slipping towards the edges, which constitutes an additional preferable feature of the invention.
The present disclosure also provides a battery unit comprising: a plurality of cells arranged in a stacked order; and a cooling sheet provided between adjacent cells, the cooling sheet having at least one edge which is bent at a predetermined angle and configured such that the at least one edge of adjacent cooling sheets are aligned spatially in a same direction and partially overlap in order to form a die gap in a direction of alignment.
The present disclosure further provides a battery unit comprising: a first plurality of cells arranged in a first stacked order; a second plurality of cells arranged in a second stacked order and opposed to the first plurality of cells; a first cooling sheet provided between adjacent ones of the first plurality of cells, the first cooling sheet having at least
2 one first edge which is bent at a first predetermined angle and configured such that the at least one first edge of adjacent first cooling sheets are aligned spatially in a same direction and partially overlap in order to form a first gap in a direction of alignment;
and a second cooling sheet provided between adjacent ones of the second plurality of cells, the second cooling sheet having at least one second edge which is bent at a second predetermined angle and configured such that the at least one second edge of adjacent second cooling sheets are aligned spatially in the same direction and partially overlap in order to form a second gap in the direction of alignment, wherein the at least one first edge and the at least one second edge are bent in the same direction.
The present disclosure further provides a battery unit comprising: a plurality of cells spaced from each other; and a cooling sheet provided in a space between adjacent cells, the cooling sheet having a first section at a base portion thereof, a second section at a distal portion thereof, and a third section between the first section and the second section, wherein: the second section is bent at a predetermined angle relative to the first section such that the second section of adjacent cooling sheets are aligned spatially in a same direction and partially overlap to form a gap; and the third section is curled relative to the first section to thereby prevent a cell adjacent to one of cooling sheets from slipping towards the second section.
Brief Description of the Drawings The invention is described in more detail in the enclosed figures and drawings, which present an implementation example. The drawings demonstrate Fig. 1 a battery unit according to the invention with a cell stack from a perspective view;
Fig. 2 the edge area of the cell stack depicted in Fig. 1 from a top view; and Fig. 3 the edges of a battery unit of two opposite stacks with multiple cell stacks from a top view.
2a Detailed Description Fig. 1 shows a battery unit 1 with a stack 2 of flat cells 3, between which the metal cooling sheets 4 are placed. The cells 3 can, for example, be Lithium-ion cells, which are encapsulated in a plastic shrink-wrap and equipped with the appropriate electrical connections.
According to Fig. 2, the cooling metal sheets 4 each have an angled edge 5.
The edges 5 of adjacent metal cooling sheets 4 are angled in the same direction and partially overlap. As a result, the edges 5 form die gaps 6 in the overlapping areas, which redirect any gases or flames emanating from the cells 3 to the side. I.e., the gases or flames are directed away from adjacent and opposite cells (see arrows 7 in Fig. 3).
The angle a formed between the metal sheets and their bent edges 5 is preferably greater than or equal to 45 degrees, but in any case less than 90 degrees, in order to create the die gaps 6. Preferably, the angle a is between 70 degrees and 85 degrees, and ideally around 80 degrees.
In areas 8 that are directly adjacent to the edges 5, the cooling plates 4 are curled in order to prevent the directly adjacent cells (s) from sliding all the way to the edges (5).
The invention is not limited to the illustrated implementation example, but includes all variations and modifications that fall within the scope of the claims listed below.
3

Claims (19)

We Claim:
1. A battery unit comprising:
a plurality of cells arranged in a stacked order; and a cooling sheet provided between adjacent cells, the cooling sheet having at least one edge which is bent at a predetermined angle and configured such that the at least one edge of adjacent cooling sheets are aligned spatially in a same direction and partially overlap in order to form a die gap in a direction of alignment.
2. The battery unit of claim 1, wherein the cooling sheet is composed of a metal material.
3. The battery unit of claim 1, wherein the predetermined angle is greater than or equal to 45 degrees.
4. The battery unit of claim 3, wherein the predetermined angle is less than 90 degrees.
5. The battery unit of claim 1, wherein the predetermined angle is in a range of between 70 degrees and 85 degrees.
6. A battery unit comprising:
a first plurality of cells arranged in a first stacked order;
a second plurality of cells arranged in a second stacked order and opposed to the first plurality of cells;

a first cooling sheet provided between adjacent ones of the first plurality of cells, the first cooling sheet having at least one first edge which is bent at a first predetermined angle and configured such that the at least one first edge of adjacent first cooling sheets are aligned spatially in a same direction and partially overlap in order to form a first gap in a direction of alignment; and a second cooling sheet provided between adjacent ones of the second plurality of cells, the second cooling sheet having at least one second edge which is bent at a second predetermined angle and configured such that the at least one second edge of adjacent second cooling sheets are aligned spatially in the same direction and partially overlap in order to form a second gap in the direction of alignment, wherein the at least one first edge and the at least one second edge are bent in the same direction.
7. The battery unit of claim 6, wherein the first cooling sheet is composed of a metal material.
8. The battery unit of claim 6, wherein the second cooling sheet is composed of a metal material.
9. The battery unit of claim 6, wherein the first cooling sheet and the second cooling sheet are composed of the same material.
10. The battery unit of claim 9, wherein the first cooling sheet and the second cooling sheet are composed of a metal material.
11. The battery unit of claim 6, wherein:
the first predetermined angle is greater than or equal to 45 degrees; and the second predetermined angle is greater than or equal to 45 degrees.
12. The battery unit of claim 11, wherein the first predetermined angle and the second predetermined angle is less than 90 degrees.
13. The battery unit of claim 6, wherein:
the first predetermined angle is in a first range of between 70 degrees and 85 degrees; and the second predetermined angle is in a second range of between 70 degrees and degrees.
14. The battery unit of claim 6, wherein the first predetermined angle is to the same as the second predetermined angle.
15. A battery unit comprising:
a plurality of cells spaced from each other; and a cooling sheet provided in a space between adjacent cells, the cooling sheet having a first section at a base portion thereof, a second section at a distal portion thereof, and a third section between the first section and the second section, wherein:
the second section is bent at a predetermined angle relative to the first section such that the second section of adjacent cooling sheets are aligned spatially in a same direction and partially overlap to form a gap; and the third section is curled relative to the first section to thereby prevent a cell adjacent to one of cooling sheets from slipping towards the second section.
16. The battery unit of claim 15, wherein the cooling sheet is composed of a metal material.
17. The battery unit of claim 15, wherein the predetermined angle is greater than or equal to 45 degrees.
18. The battery unit of claim 17, wherein the predetermined angle is less than 90 degrees.
19. The battery unit of claim 15, wherein the predetermined angle is in a range of between 70 degrees and 85 degrees.
CA2761758A 2009-05-11 2010-05-11 Battery unit Active CA2761758C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009020787 2009-05-11
DE102009020787.2 2009-05-11
PCT/EP2010/056506 WO2010130760A1 (en) 2009-05-11 2010-05-11 Battery unit

Publications (2)

Publication Number Publication Date
CA2761758A1 CA2761758A1 (en) 2010-11-18
CA2761758C true CA2761758C (en) 2015-03-24

Family

ID=42288595

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2761758A Active CA2761758C (en) 2009-05-11 2010-05-11 Battery unit

Country Status (4)

Country Link
US (1) US8790805B2 (en)
EP (1) EP2430682B1 (en)
CA (1) CA2761758C (en)
WO (1) WO2010130760A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007069B4 (en) * 2011-04-08 2018-11-22 Continental Automotive Gmbh Electrical energy store with a plurality of cells and at least one cooling element arranged between the cells and its use
DE102011051648B4 (en) 2011-07-07 2024-11-07 Dr. Ing. H.C. F. Porsche Aktiengesellschaft battery unit of a motor vehicle battery
WO2013145917A1 (en) * 2012-03-27 2013-10-03 ソニー株式会社 Galvanic unit, galvanic module, power storage system, electronic equipment, electric power system, and electric vehicle
DE102012018035A1 (en) * 2012-09-13 2014-03-13 Daimler Ag Single battery cell in the form of a bipolar Rahmenflachzelle
US10096804B2 (en) * 2013-10-08 2018-10-09 Nissan Motor Co., Ltd. Battery pack
KR102160275B1 (en) * 2017-07-31 2020-09-25 주식회사 엘지화학 Cell cartridge and battery module including same
FR3098022B1 (en) * 2019-06-28 2021-05-28 Faurecia Systemes Dechappement Electricity storage battery and vehicle
DE102020102221A1 (en) 2020-01-30 2021-08-05 Audi Aktiengesellschaft Battery cell with shielding layer, battery and motor vehicle with a battery
DE102021202163A1 (en) 2021-03-05 2022-09-08 Commeo Gmbh accumulator module
ES3064737T3 (en) * 2022-07-20 2026-04-28 Lg Energy Solution Ltd Battery pack, battery module, and vehicle including same
WO2024048985A1 (en) * 2022-08-31 2024-03-07 주식회사 엘지에너지솔루션 Battery pack, battery module and vehicle comprising same

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US5424143A (en) * 1994-09-16 1995-06-13 Electric Fuel (E.F.L.) Limited Air-cooled, metal-air battery
JP3451142B2 (en) * 1994-11-18 2003-09-29 本田技研工業株式会社 Battery assembly with temperature control mechanism
US7531270B2 (en) * 2006-10-13 2009-05-12 Enerdel, Inc. Battery pack with integral cooling and bussing devices
WO2008122384A1 (en) * 2007-04-05 2008-10-16 Behr Gmbh & Co. Kg Electrochemical energy storage unit comprising a cooling device
DE102007050400A1 (en) 2007-10-19 2009-04-23 Behr Gmbh & Co. Kg Device for electronic energy storage
US8231996B2 (en) * 2008-02-15 2012-07-31 Atieva Usa, Inc Method of cooling a battery pack using flat heat pipes

Also Published As

Publication number Publication date
US8790805B2 (en) 2014-07-29
EP2430682A1 (en) 2012-03-21
US20120148887A1 (en) 2012-06-14
CA2761758A1 (en) 2010-11-18
WO2010130760A1 (en) 2010-11-18
EP2430682B1 (en) 2013-06-26

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