Classifications

• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/183—Sealing members
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/172—Arrangements of electric connectors penetrating the casing
  • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
  • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/147—Lids or covers
• • 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
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/543—Terminals
  • H01M50/552—Terminals characterised by their shape
  • H01M50/561—Hollow metallic terminals, e.g. terminal bushings
• • 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 present invention relates to a system for sealing electrical
• Terminal poles of a rechargeable battery in particular for sealing connection poles of a lithium-ion battery for use in the automotive sector.
• Lithium-ion batteries (hereinafter Lilon batteries for short) are known from the prior art, which are used in particular in the automotive sector. These Lilon batteries have a housing, mostly for spatial reasons in a prismatic form, in which there is an electrical storage element which stores electrical energy and on demand, for example in a hybrid vehicle for the power supply of drive motors, provides. However, a detailed description of the memory element should be omitted here, as this is known
• terminal poles which form a passage through the housing.
• the requirements on the one hand that the respective implementation is sealed for a terminal pole so that the pressurized electrolyte located in the housing can not escape.
• the connecting poles must withstand mechanical stresses without endangering the tightness. The mechanical loads are in the
• seal gasket seals are known to fulfill the above-mentioned requirements (see further the description with reference to Figures 1 and 2), which both the function of Sealing and the electrical insulation of the terminal poles relative to the housing as well as the function of recording the mechanical Take over loads on the connecting poles.
• the problem is, however, that the material of this seal gasket seals relaxes, ie its dimensions over the life does not comply and thus it can lead to leaks in the terminal poles.
• seal gaskets seal can be additionally deformed by the absorption of shear forces, and the seal does not self-healing (in the sense of the so-called "design rule of self-help"), ie elastic, to compensate for the resulting leaks again.
• the invention proposes, in a first aspect according to claim 1, a system for sealing electrical connection poles of a rechargeable battery, the system comprising: a housing with an electrical storage element, wherein the housing has at least two through openings for terminal poles electrically connected to the storage element; first sealing elements, which in each case fully around a terminal pole and between this and the corresponding
• Second sealing elements which are disposed within the housing completely on a circumference of a first sealing element and on a housing inner surface in a sealing manner.
• the first sealing elements are made of a material which is electrically insulating and can mechanically absorb a force transverse to a longitudinal axis of a terminal pole.
• the first sealing elements are not elements with a purely sealing function, in order to avoid the leakage of electrolyte fluid in the terminal poles, but elements that "seal" the space between the terminal poles and the through holes, but mainly for receiving mechanical loads are formed on the terminal poles. For the sake of simplicity, these elements should also be considered as
• the second sealing elements are made of a material, in particular an elastomeric material, which in a plastic manner
• the second sealing elements are permanently elastic. Thus, it is avoided that the second sealing elements lose their sealing effect over time due to changes in shape. In addition, the second sealing elements are thus able to compensate for short-term deformations occurring due to mechanical loads (so-called
• the second sealing elements have a top recess and a bottom recess in cross section along its circumference.
• this particular design of the second sealing elements is a lip-like
• the second sealing elements are molded onto the first sealing elements in the manner of a two-component component in an integral manner. This simplifies the production of the system and the installation in a rechargeable battery.
• the first sealing elements along their circumference, which adjoins the second sealing elements each have a collar which engages in a correspondingly shaped recess in the second sealing elements. This is advantageous because it provides a mechanical stability of the second sealing elements.
• the accumulator is a lithium-ion accumulator for use in an automotive vehicle, which is a
• Hydropower vehicle an aircraft or spacecraft and / or a land vehicle can act.
• the disclosed invention is particularly suitable Way, since the stress, for example, in terms of mechanical forces due to constant movements are relatively high.
• Figure 1 shows a structure of a conventional lithium-ion battery in one
• Figure 2 shows a detailed view of a terminal pole of the battery of Figure 1;
• Figure 3 shows a detail view of a terminal pole with a sealing system according to an embodiment of the invention.
• Figure 4 shows a detailed view of a terminal pole with a sealing system according to another embodiment of the invention.
• FIG. 1 shows an essential schematic structure of a conventional lithium-ion battery 10 in an exploded view.
• the battery 10 comprises a housing 15, in the interior of which a flat-pressed winding made of an aluminum foil and a copper foil is located (not shown here), the foils being coated in each case with active cathode and anode materials.
• a separator that is a plastic or
• Ceramic foil is arranged.
• the housing 15 is filled after introduction of the coil with a liquid electrolyte.
• Terminal pole 25, 26 has, each of which through through holes 30, 31 in a housing closure plate 35 form a compound of the housing 15 located in the coil outwards. Furthermore, in the region of the connection poles 25, 26, so-called seal gaskets seals 40, 41 can be seen in FIG. 1, which will be described in detail below. These seals 40, 41 essentially form a seal between the
• FIG. 2 shows a detailed view of a connection pole 25, in this case a
• seal 40 shown in FIG. 2 has been replaced by two elements, namely by a first sealing element 55 and a second sealing element 60.
• the first sealing element 55 essentially serves to produce an electrical insulation between the connection pole 25 and the housing closure plate 35 and to absorb mechanical transverse forces on the connection pole 25, while the second sealing element 60 only performs the function of sealing, that is to prevent electrolyte fluid in the Area of the terminal 25 can escape from the housing 15.
• first sealing member 55 and the second sealing element 60 are each made of different materials, the second sealing element 60 is permanently elastic designed to accommodate occurring deformations and the pending internal pressure in self-healing or.
• the second sealing element 60 is made of an elastomeric material. But any other suitable material or combination of materials is conceivable for the sealing elements.
• FIG. 4 shows a further embodiment of the present invention, wherein the difference from the embodiment shown in FIG. 3 is that the first sealing element 55 has on its circumference a collar 70, which in one
• the collar 70 which engages in the recess 80 in the second sealing element 60, serves to mechanically stabilize the second sealing element 60 and, as in the embodiment shown in FIG. 3, may be designed in the manner of a two-component component, the second sealing element 60 in FIG integral manner to the first sealing element 55 and the collar 70 may be molded.
• Sealing element 60 conceivable. It should also be mentioned that the above with respect to the sealing elements refers to both terminal poles in the same way.
• the present invention is distinguished by the fact that the functions of sealing, isolating and absorbing transverse forces are either divided into two components, namely the first sealing element and the second sealing element, or are taken over by different functional regions of an assembly, in the case an integral version of the two sealing elements.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Sealing Battery Cases Or Jackets (AREA)
• Connection Of Batteries Or Terminals (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48651999

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (2)

Citations (4)

• 2012
  • 2012-06-27 DE DE102012210927.7A patent/DE102012210927A1/de not_active Ceased
• 2013
  • 2013-06-05 WO PCT/EP2013/061550 patent/WO2014001042A1/fr not_active Ceased

Patent Citations (4)

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