WO2012130631A1 - Élément de batterie - Google Patents

Élément de batterie Download PDF

Info

Publication number
WO2012130631A1
WO2012130631A1 PCT/EP2012/054594 EP2012054594W WO2012130631A1 WO 2012130631 A1 WO2012130631 A1 WO 2012130631A1 EP 2012054594 W EP2012054594 W EP 2012054594W WO 2012130631 A1 WO2012130631 A1 WO 2012130631A1
Authority
WO
WIPO (PCT)
Prior art keywords
groove
battery cell
housing wall
range
housing
Prior art date
Application number
PCT/EP2012/054594
Other languages
German (de)
English (en)
Inventor
Stefan Pfeiffer
Thomas Kretschmar
Kai Kuhlmann
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2012130631A1 publication Critical patent/WO2012130631A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention is based on a battery cell according to the preamble of the independent claim.
  • a battery (or a battery system), such as in hybrid or
  • Electric vehicles usually consists of several battery modules, which in turn are composed of individual battery cells (for example, lithium-ion battery cells).
  • a single battery cell has a housing and electrical storage elements (also referred to as galvanic cells or simply cells) arranged in the housing.
  • Batteries are subject to predetermined limitations, for example, the maximum possible housing dimensions. On the one hand, these are determined by industry standards and, on the other hand, limited by the space available for battery cells or modules. The limited
  • Battery cell volume is partially from the storage elements
  • Electrochemical cells can generate gas during both charging and discharging. Especially under unusual conditions, such as accidental deep discharge or the first charge of a primary cell it comes to gas evolution. Accordingly, cells are designed to allow internal overpressure to escape the cell in a controlled manner.
  • a battery in which a pressure relief valve for the controlled escape of gas provides.
  • an annular groove is provided in the housing wall, which is interrupted at least two places. If overpressure builds up within the battery, the housing wall preferably breaks in the region of the groove on which the housing wall is made thinner.
  • a disadvantage of this device is that the predetermined bursting pressure at which the groove breaks open is wide
  • Range varies by the preferred bursting pressure.
  • Another disadvantage is that the pressure relief valve is incorporated in thin membranes. These must be subsequently welded or clamped in openings of the housing wall, resulting in an increased labor and cost. In addition, there is always the risk of leaks between membrane and housing in this type of membrane.
  • the battery cell according to the invention with the characterizing part of claim 1 has the advantage that it has an improved pressure relief valve which opens at a defined bursting pressure, whereby excess pressure can escape from the battery.
  • the invention provides that the housing has a pressure relief valve as a means of protection against overpressure, which is arranged on the housing wall.
  • the pressure relief valve has a first, a second and a third groove, wherein the first and the second groove on the same side of the
  • Housing wall are arranged side by side.
  • the third groove lies between the first and second groove and on one, the first and second groove opposite lying side of the housing wall. If the housing bulges outward in the region of the grooves due to an increased internal pressure, the three grooves act together in the manner of a hinge, whereby a controlled opening of the housing is possible. Advantageously thus takes place through the third groove
  • the first groove and the second groove at a distance A_l of 5 to 20 mm from each other. If the distance A_l between the two grooves is smaller than 5 mm or larger than 20 mm, the bursting pressure can not be given within the desired accuracy.
  • the first groove and / or the second groove have a length L_l in the range of 10 to 40 mm and / or the third groove have a length in the range of 5 to 30 mm ,
  • At least one of the three grooves has a depth T_l in the range of 0.2 to 0.5 mm and / or the first and / or the second and / or the third groove each have a width B_l in the range of 0.3 to 0.6 mm.
  • the third groove is arranged centrally between the first groove and the second groove. In this position, the hinge effect can develop particularly advantageous and the bursting pressure can be set very accurately.
  • the first and the second groove are connected at at least one end by a further groove to a circulation groove. Due to the embodiment as a circumferential groove, the opening area is advantageously increased.
  • An elliptical embodiment of the circumferential groove has proven particularly advantageous, wherein the circumferential groove has a length L_2 in the range of 10 to 40 mm and / or a width B_2 in the range of 5 to 20 mm.
  • the third groove in the area enclosed by the circumferential groove. Due to the central arrangement of the third groove, the hinge-like action between the first two grooves and the third groove can unfold optimally and the desired bursting pressure can be optimally adjusted.
  • FIG. 1 shows a perspective view of a battery cell of a
  • Figure 2 shows a section of the housing wall of the first
  • FIG. 3 shows a sectional view of the housing wall of a battery cell.
  • FIG. 4 shows a further sectional view of the housing wall of FIG.
  • FIG. 5 shows a further section of the housing wall of FIG
  • Battery cell shows a further section of the housing wall one
  • Figure 1 shows a first embodiment of the invention, a battery cell 11 in a perspective view.
  • the battery cell 11 is substantially rectangular and flat and has a small thickness. It is
  • the pressure relief valve 14 is composed of a first groove 15, a second groove 16 and a third groove 17, wherein the first two grooves 15, 16 are arranged on the outer side 20 of the housing wall 13, whereas the third groove 17 on the inner side 21 (FIGS. not shown here) of the housing wall 13 is arranged.
  • the third groove 17 is centered between the first and second Groove 15, 16 arranged.
  • the first and second groove 15, 16 may also be arranged on the inner side 21 of the housing wall, wherein the third groove 17 between the first and second groove 15, 16 and on the opposite side of the housing wall thirteenth , which is 20 outside, is arranged.
  • Figure 2 shows a plan view of a section of the housing wall 13 of the
  • the first groove 15 and the second groove 16 are arranged at a distance A_l of 5 to 20 mm and preferably 12 mm from each other, wherein the first groove 15th and / or the second groove 16 have a length L_l in the range of 10 to 40 mm, and preferably 25 mm.
  • the third groove 17 has a length L_2 in
  • FIG. 3 shows a sectional view of the housing wall 13 of the battery cell 11 according to the first exemplary embodiment of the invention from FIG. 1.
  • the first and / or the second and / or the third groove 15, 16, 17 have a depth T_l in the range from 0.2 to 0.5 mm and preferably 0.4 mm.
  • FIG. 4 shows a further sectional illustration of the housing wall 13 of FIG.
  • Battery cell 11 according to the first embodiment of the invention of Figure 1, wherein the first and / or the second and / or the third groove 15, 16, 17 has a width B_l in the range of 0.3 to 0.6 mm and preferably 0.4 mm have.
  • FIG. 5 shows a further embodiment of the invention, a further detail of the housing wall 13 of the battery cell 11 of Figure 1.
  • the first groove 15 is connected to the second groove 16 at one end by a further fourth groove 19 to a circumferential groove 18.
  • the circulation groove 18 is open on one side and U-shaped.
  • the area enclosed by the circumferential groove 18 region 22 has a length L_l in the range of 10 to 40 mm and the legs of the U-shaped
  • Circumferential groove 18 are at a distance A_l of 5 to 20 mm from each other
  • the third groove 17 is arranged centrally in the area enclosed by the circumferential groove 18 and has a length L_2 in the range of 5 to 30 mm. All grooves 15, 16, 17, 18, 19 have a depth T_l in the range of 0.2 to 0.5 mm and a width B_l in the range of 0.3 to 0.6 mm.
  • the circumferential groove 18 can be arranged both on the inner side 21 and on the outer side 20 of the housing wall 13.
  • Figure 6 shows a further embodiment of the invention, a further detail of the housing wall 13 of the battery cell 11 of Figure 1.
  • the first groove 15 is connected to the second groove 16 at both ends by further grooves 19, 23 to a Circumferential groove 18 connected.
  • the circulation groove 18 is closed and elliptical.
  • the circumferential groove 18 forms an ellipse 24, which has a large diameter L_l in the range of 10 to 40 mm and a small diameter A_l of 5 to 20 mm.
  • the third groove 17 is arranged centrally in the region enclosed by the circumferential groove 19 region 24, thus lies on the line connecting the two focal points 25, 26 of the ellipse formed by the circumferential groove 18 and has a length L_2 in the range of 5 to 30 mm.
  • All grooves 15, 16, 17, 18, 19 have a depth T_l in the range of 0.2 to 0.5 mm and a width B_l in the range of 0.3 to 0.6 mm.
  • the circumferential groove 18 can be arranged both on the inner side 21 and on the outer side 20 of the housing wall 13.

Abstract

L'invention concerne un élément de batterie, en particulier de batterie lithium-ions, qui comprend une paroi de boîtier et un moyen de protection contre les surpressions disposé sur la paroi de boîtier. Le moyen de protection contre les surpressions comporte une première, une deuxième et une troisième rainure, la première et la deuxième rainure étant disposées l'une à côté de l'autre sur le même côté de la paroi de boîtier. La troisième rainure se trouve entre la première et la deuxième rainure et est disposée sur un côté de la paroi de boîtier opposé à la première et à la deuxième rainure.
PCT/EP2012/054594 2011-03-28 2012-03-15 Élément de batterie WO2012130631A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006225A DE102011006225A1 (de) 2011-03-28 2011-03-28 Batteriezelle
DE102011006225.4 2011-03-28

Publications (1)

Publication Number Publication Date
WO2012130631A1 true WO2012130631A1 (fr) 2012-10-04

Family

ID=45932294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/054594 WO2012130631A1 (fr) 2011-03-28 2012-03-15 Élément de batterie

Country Status (2)

Country Link
DE (1) DE102011006225A1 (fr)
WO (1) WO2012130631A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102195733B1 (ko) * 2014-01-20 2020-12-28 삼성에스디아이 주식회사 커브드 이차 전지

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070134547A1 (en) 2003-02-11 2007-06-14 Bouffard Richard L Battery cell with improved pressure relief vent
US20070154782A1 (en) * 2005-12-29 2007-07-05 Sungjae Cho Secondary battery and its method of manufacture
EP1928042A2 (fr) * 2006-10-25 2008-06-04 Samsung SDI Co., Ltd. Batterie rechargeable au lithium ion de type canette prismatique
WO2010140436A1 (fr) * 2009-06-04 2010-12-09 トヨタ自動車株式会社 Batterie scellée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070134547A1 (en) 2003-02-11 2007-06-14 Bouffard Richard L Battery cell with improved pressure relief vent
US20070154782A1 (en) * 2005-12-29 2007-07-05 Sungjae Cho Secondary battery and its method of manufacture
EP1928042A2 (fr) * 2006-10-25 2008-06-04 Samsung SDI Co., Ltd. Batterie rechargeable au lithium ion de type canette prismatique
WO2010140436A1 (fr) * 2009-06-04 2010-12-09 トヨタ自動車株式会社 Batterie scellée
US20120114988A1 (en) * 2009-06-04 2012-05-10 Tomohiro Matsuura Sealed battery

Also Published As

Publication number Publication date
DE102011006225A1 (de) 2012-10-04

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