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
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
• • 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
  • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
  • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
  • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
  • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
  • H01M50/50—Current conducting connections for cells or 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
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
  • H01M50/514—Methods for interconnecting adjacent batteries or cells
  • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
• • 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 battery cell, which is designed in particular as a flat battery cell.
• battery cells comprise a sheath, within which at least one electric cell is accommodated.
• An electric cell may be a primary battery cell, i. a non-rechargeable battery cell.
• the battery cell may also be used as a secondary battery cell, i. as a rechargeable battery cell, be designed.
• a current conductor is electrically connected to electrodes of the electrical cell.
• Such battery cells are used in particular in electrically driven vehicles.
• FIG. 1 shows two battery cells 1, each having a current conductor 3, which forms a connection of the battery cell 1 to the outside.
• a second current collector is not shown.
• the current collector 3 has a base section 4, which extends from the enclosure 2 of the battery cell 1.
• the current conductor 3 further has a contacting section 5, which can be brought into contact with a contacting section 5 of a second battery cell 1.
• the contacting sections 5 of the two battery cells 1 can be welded together by means of a welding gun 25 whose two arms are shown.
• the lower arm of the welding gun 25 extends into a tubular space which is formed by the current collector 3 and the sheaths 2 of the two battery cells 1.
• FIG. 2 shows a further embodiment of the prior art.
• a battery cell 1 has a current conductor 3, which is designed flat.
• an additional electrically conductive contact element 26 is arranged in the intermediate space between the two contact sections 5.
• the object of the present invention is to produce an improved battery cell.
• a battery cell in particular flat battery cell, comprising at least one enclosure for receiving at least one electrical cell, at least one current conductor having at least one base portion and at least one Diesticiansab- cut, wherein the contacting portion angled relative to the base portion is.
• the contacting section is preferably used to bring the current arrester in electrical connection with an external component, in particular a connecting element or a connecting sleeve. Furthermore, a contacting section can also be brought into direct or indirect contact with a contacting section of an adjacent battery cell in order to establish an electrical connection between two battery cells.
• the base section of the current conductor represents the region of the current conductor from which the current conductor extends from the enclosure. By the angling between the base section and the contacting section, the contacting section can be brought into a favorable geometric position for improved connection possibilities.
• the contacting portion is angled relative to the base portion about a bending axis, wherein the bending axis is arranged parallel to a module direction of the battery cell.
• the module direction of a prismatic battery cell can be determined by the alignments of the longest boundary be defined edging edge of the battery cell.
• the module direction of a prismatic cell can also be defined by a perpendicular to a side surface, wherein as a reference surface preferably that side surface is used, through which the base portion extends from the enclosure.
• the module direction in a round battery cell can be defined by the longitudinal axis at which extends parallel to the cylindrical outer surface of the round battery cell.
• the module direction can also be defined by a vertical line through the surface portion of the enclosure of the battery cell, which penetrates the base portion.
• a arranged on the contacting portion contacting surface is aligned parallel to the module direction.
• a tool which can be used to connect two contacting sections, can be approached in particular by a movement in the direction of the module to the contacting section and only has to overcome a short path.
• a tool arm carrying the tool can be made short.
• a tool can be a welding tongs.
• a tool arm may be the arm of a welding gun.
• the contacting section which carries the contacting surface, can point in the direction of an adjacent battery cell, which bears against a largest side surface of the battery cell.
• a contacting of the contacting portion is simplified and can in particular lead to a material and weight savings.
• the contacting portion is angled approximately at right angles to the base portion.
• the term right-angled or vertical is basically to be interpreted broadly and in particular also includes deviations of exactly 90 ° from up to 15 °.
• the sum of the amounts of the bends two adjoining Druckmaschinesabête adjacent arranged battery cells 180 °. In this way it can be achieved that the contacting sections are aligned parallel to one another.
• a current conductor preferably has at least two contacting sections.
• the contacting sections can be designed identically.
• a current conductor has an essentially L-shape, wherein in particular a leg is formed by the base portion and a leg by the contacting portion.
• the legs are in particular elongated and are preferably perpendicular to each other.
• the legs are preferably configured flat.
• the current collector may have a U-shape, which is preferably formed by the base portion and each arranged laterally contacting portions.
• the contacting sections are preferably arranged on mutually opposite regions of the base section. Both contacting sections are preferably bent over a respective bending axis relative to the base section, wherein both bending axes are preferably arranged parallel to each other.
• the contacting portion extends away from the base portion in a direction perpendicular to a largest side surface of the battery cell.
• the largest side surface may be that which has the largest surface area in terms of amount.
• the module direction can run perpendicular to a base circle, which spans a preferably cylindrical boundary surface of the battery cell.
• the module direction runs parallel, in particular coaxial with the cylindrical surface.
• a contacting portion is arranged parallel to the base portion. This can be done in particular by multiple bending around in particular two bending axes of the current conductor.
• the bending axes can be arranged parallel to each other.
• the bending axes can be aligned perpendicular to the module direction.
• the contacting section is preferably arranged at a distance from the base section. Between the base portion and contacting portion may be provided a connecting web.
• the base portion and the contacting portion may face the connecting land in the same direction.
• the bending between connecting web and base section can take place around the same direction as the bending between contacting section and connecting web.
• the current collector may preferably have a U-shape, wherein the outer legs of the U-shape may be formed by the base portion and the contacting portion.
• the base of the U-shape may be formed by the connecting web.
• the connection web can be arranged perpendicular to the base section and / or to the contacting section.
• a contacting portion is spaced at least a length from the base portion corresponding to at least a distance of the base portion to a parallel to the base portion extending side surface of the battery cell.
• the contacting section is arranged spaced apart from the base section by such an offset that the contacting section is aligned with a side face of the battery cell or, in particular, projects beyond the side face.
• the contacting section can be brought into contact in a simplified manner with contacting sections, in particular of identically designed, adjacently arranged battery cells, without the need for further components, in particular connecting elements which overcome this problem.
• the total number of parts and thus weight as well as the assembly costs can be reduced.
• a contacting section may preferably have a sawtooth structure.
• a sawtooth structure can offer the advantages that several different connection points, which are produced in particular by welded joints, are present.
• train voltages on the battery cells which are particularly noticeable as shear stresses on the Kunststoff Industriessabêten, at least partially divided into normal force components.
• the fatigue strength of the connection of Dies michsabitesen is increased.
• a contacting surface of the contacting section can be increased in size by the sawtooth structure. In this respect, an enlarged contact surface for connecting adjacent battery cells are available.
• the base portion has at least one through-hole.
• Traction means can be introduced through the through-bore, which allow clamping of the base sections and / or the battery cell with other components.
• the base section preferably has first alignment means, in particular at least one, in particular two alignment bores.
• the alignment means can serve to align other components, in particular insulation elements, with respect to the current conductor and / or the battery cell.
• the alignment means may also be used for alignment of an assembly tool.
• At least one spacer is arranged between the base section and the contacting section.
• the spacer serves to maintain a predetermined distance and / or a predetermined orientation, in particular an angular alignment between the base section and the contacting section.
• a spacer can transmit a force, which acts in each case either on the base section or on the contacting section, to the respective other of the two elements.
• the spacer may be made of electrically insulating material.
• the spacer may be made of electrically conductive material.
• a width of a spacer corresponds to a length of a land portion of the current collector.
• a web section of the current conductor can In this case, it should be a connecting web between the base section and the contacting section.
• the spacer may be disposed between the contacting portion and the base portion.
• the object underlying the invention is further achieved by a battery arrangement, comprising at least two of the aforementioned battery cells, wherein contacting portions of adjacent battery cells with each other electrically, in particular directly with each other, are connected.
• contacting portions of adjacent battery cells are directly electrically connected to each other, in particular by welding, in particular by ultrasonic welding.
• the ultrasonic welding allows a simple and reliable connection of two contacting sections.
• U-shaped current conductors of adjacent battery cells together form a closed surface, in particular an annularly closed peripheral surface.
• two contacting sections of a battery cell are each connected to one, that is to say a total of two contacting sections of an adjacent battery cell. Due to the closed surface results in particular a high area moment of inertia of the interconnected current conductors, which thus have a high rigidity against externally applied forces.
• an insulating body is arranged between the base sections of adjacent battery cells, in particular between base sections of current conductors, and in particular within a closed surface.
• the insulating body can serve as a spacer between the base sections of two serve adjacent arranged battery cells.
• the spacer is preferably arranged in such a way that it can absorb compressive forces that cause one another to act on current conductors, so that current conductor sections are held in their relative position to the battery cell. This is particularly advantageous if the current conductors are tensioned by means of traction means.
• the insulation body can also be used to insulate current conductors of adjacent battery cells. This is particularly advantageous if the insulating body is arranged between two current conductors, which should not come into electrical connection with each other. If the insulating body is arranged between two current conductors which can be electrically connected to one another, the insulating material can also be made of electrically conductive material. In this case, the insulating body serves in particular as a mechanical spacer, without electrically insulating.
• similar insulator bodies can be used both as mechanical spacers and as electrical insulator elements. This leads to a reduction in the variety of parts.
• the insulating body has a second through-bore.
• a traction means can be passed, which can clamp the current conductor and the insulation body together.
• the second through-holes of insulating bodies can have the same diameter as the first through-holes of the current conductors.
• an insulation body has second alignment means, in particular in the form of at least one alignment projection, in particular two alignment projections.
• first alignment means of battery cell len in particular of current conductors of battery cells, are brought into engagement with the second alignment means of the insulating body.
• one or more, in particular two alignment projections of one or more insulation bodies can engage in one or more, in particular two alignment bores of the battery cells, in particular of the current conductor.
• a tie rod is passed through through holes.
• the through-holes can be arranged in the insulating body and / or in the battery cell, in particular in the current collector of the battery cell. As a result, the said components can be clamped together.
• the object underlying the invention is further achieved by a method for producing an aforementioned battery arrangement, comprising the following method steps: applying a side surface of a battery surface to a side surface of an adjacent battery cell; Connecting a contacting portion of a battery cell with a. Contacting section of an adjacent battery cell, in particular cohesive connection.
• the bonding of the contacting section is performed by material-locking joining, in particular by welding, in particular by ultrasonic welding.
• the side surfaces of the battery cells do not necessarily have to touch each other.
• a heat conducting plate can be arranged between the side surfaces.
• At least one insulation body is arranged between the current conductors of adjacent battery cells.
• the insulation bodies and base portions may be aligned along a common alignment axis.
• the common alignment axis can be defined by coaxial to be arranged through holes both at the base portion and on the insulation bodies. Traction means, in particular a tie rod, can pass through the alignment bores. leads, with the help of the insulation body and current conductors can be clamped together.
• the insulation bodies are aligned with respect to the current conductors, in particular first alignment means of the current conductor are brought into engagement with second alignment means of the insulation body.
• alignment projections of the insulation body can be inserted into alignment bores of the current conductor.
• the battery cells are tensioned against each other via traction means, in particular via a tie rod.
• a tie rod in a first through hole of the current collector, in particular in a through hole of a base portion of the Stromableiters, and a second through hole of the insulating body are performed.
• a tool component in particular at least one arm of a welding apparatus, can be guided along a module direction to the contacting section.
• Fig. 1 the contacting of two battery cells according to the prior art a) in side view, b) in plan view;
• FIG. 3 shows a battery arrangement according to the invention with a plurality of battery cells according to the invention in a perspective illustration
• FIG. 4 shows two adjacent battery cells according to the invention in a battery arrangement according to the invention
• FIG. 6 shows an insulating body of the battery arrangement
• FIG. 7 shows the sealing area of a battery cell.
• FIG. 3 shows five battery cells 1, which together form part of a battery arrangement 27.
• the battery cells 1 are designed as flat battery cells and have a plurality of side surfaces 18.
• the side surface 18 ' has the largest surface area content of all side surfaces 18.
• the battery cells 1 are at their largest side surfaces 18 ' directly in contact with each other.
• a heat conducting plate not shown, may be arranged between the side surfaces 18 '. All side surfaces 18 of a battery cell 1 form the enclosure 2 of the battery cell. 1
• Each battery cell 1 has two current conductors 3, which extend from the enclosure 2 of the battery cell 1.
• the base section 4 penetrates the sheath at a sealing region of the sheath. In this case, an annular space, which is formed between the base portion 4 and the enclosure 2, sealed by sealing means, not shown.
• the battery cell 1 has a plurality of boundary edges 28.
• a longest boundary edge 28 ' is straight and defines a module direction M.
• the base section 4 of the current conductor 3 is aligned substantially parallel to the module direction M.
• Each of the current conductors 3 has two contacting sections 5, which are arranged on the base section 4 of the current conductor 3.
• the contacting sections 5 are arranged on opposite regions of the base section 4.
• the contacting sections 5 are bent at right angles relative to the base section 4, namely around a bending axis K, which is aligned parallel to the module direction M. In this case, the contacting sections 5 point in the direction of adjacent battery cells and in particular to the contacting sections 5 of the adjacent battery cells 1.
• the contacting section 5 is parallel to a vertical S a largest side surface 18 'aligned.
• Contact surfaces on the Kontak- t istsabête 5 of adjoining battery cells 1 thus come directly into contact with each other when the battery cells 1 are brought into final alignment with each other. In the mounted state, the contacting sections of adjacent battery cells are therefore in contact with each other.
• Other connecting elements for connecting the contacting sections 5 are not necessarily necessary.
• the contacting sections 5 of adjacent battery cells 1 adjoin one another and thereby represent the electrical connection between two adjacent battery cells 1.
• the contacting sections 5 and the base sections 4 of the two connected current conductors 3 adjacent battery cells 1 thereby form an annular closed peripheral surface 8, within which an insulating body 9 is arranged.
• the insulating body 9 can in particular absorb compressive forces between the two base sections 4.
• an insulating body 9 is disposed between the base portions 4 of non-related Stromableitern 3 adjacent battery cells. This can also form an electrical insulation between the respective current conductors in addition to the mechanical forces.
• the insulation bodies 9 have second through holes 10.
• the first through holes 6 and the second through holes 10 are aligned on a common axis, wherein a tie rod 12 is passed through both through holes 6, 10.
• the tie rod 12 can clamp the arrangement of battery cells 1 and insulation body 9 in tension against each other. So that the current conductors 3 are not stressed mechanically relative to the battery cell body, the insulation bodies 9 form a support which can absorb pressure forces.
• the insulation body 9 act as a spacer.
• FIG. 4 shows battery cells 1 of a battery arrangement in an alternative embodiment.
• the battery cells 1 each have a current conductor 3, the in turn, a base portion 4, a connecting web 17 and a contacting takt istsabêt 5 has.
• the connecting web 17 is angled relative to the base portion 4 about a bending axis Ki by 90 °.
• the contacting section 5 is angled relative to the connecting web 17 about a bending axis K 1 , wherein the bending axis K 1 'extends parallel to the bending axis K 1 .
• the current conductor 3 has a multiple bending.
• the contacting section 5 is arranged at a distance from the base section 4, the distance L 1 from the base section being greater than a distance L 2 corresponding to the distance from the base section to a side face 18 'running parallel to the base section.
• the contacting section protrudes beyond the side surface 18 'of the battery cell 1 and can therefore come into direct contact with the contacting section of the adjacent battery cell 1.
• a spacer 13 is arranged, which can absorb pressure forces and thus can prevent applying the Kunststoff Industriessabterrorisms towards the base portion and vice versa.
• a base portion is enclosed by spacers 13 from two sides.
• the base portion 4 is designed flat and protrudes from within the enclosure of the battery cell 1 just beyond the spacers 13. Loads on the critical sealing area 16, ie at the area where the base portion 4 penetrates the enclosure 2, are avoided by the planar configuration of the base portion 4 to behind the spacers 13. Only in a region behind the spacers 13 is the first bend of the Stromableiters provided.
• the base portion 4 has outside the enclosure 2 an extension in the module direction, which corresponds to at least one extension of the corresponding spacer in the module direction.
• the connecting web 17 bridges a distance up to the contacting section of the adjacent battery cell 1.
• FIG. 5 shows current conductors 3 of adjacent battery cells 1, not shown in greater detail, the contacting sections 5 being brought into contact with each other.
• the contacting sections 5 have a sawtooth structure. By the sawtooth structure increases the effective contact area between two contacting sections with the same distance.
• Tensile forces F 1 which act on the contacting portions 5 away from each other, have an effect on contact surfaces with a sawtooth structure in that they have normal force components F 2 perpendicular to the contacting portions 5.
• shear stress which can occur with flat contact sections, is converted into normal force components.
• the connection of the contacting sections becomes more robust as a result.
• FIG. 6 shows the insulating body 9 from the arrangement according to FIG. 3 in detail.
• the insulating body 9 is configured as an insulating rod and has a cuboid shape.
• a second through-bore 10 is provided, which extends perpendicular to a boundary surface of the insulation body 9.
• the insulating body 9 has two alignment protrusions 11 arranged on opposite sides of the second through hole 10.
• the insulation body 9 has two further alignment projections 11, which are arranged on the non-visible rear side of the insulation body 9.
• FIG. 7 shows a detail of a battery cell as used in FIG.
• a section of the area-wise largest side surface 18 ' is to be recognized, as well as by dashed lines the current conductor 4, which extends with its base section 4 through the enclosure of the battery cell 1.
• a second side surface is formed jointly by two inclined side surfaces 18 ", and between the side surfaces 18" extends a circumferential fastening flange 15, from which the base section 4 of the current conductor 3 extends in the sectional region illustrated here.
• sealing means 16 are provided which seal the opening through which the base portion 4 extends through the enclosure.
• the module direction M can in the variant shown in addition to the possibilities already mentioned by a bisector of the two side surfaces 18 "result, which together form the side surface from which the base portion 4 extends.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Connection Of Batteries Or Terminals (AREA)
• Battery Mounting, Suspending (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42198908

Family Applications (1)

Country Status (7)

Families Citing this family (1)

Citations (1)

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• 2009
  • 2009-03-12 DE DE102009012948A patent/DE102009012948A1/de not_active Withdrawn
• 2010
  • 2010-03-11 BR BRPI1009861A patent/BRPI1009861A2/pt not_active IP Right Cessation
  • 2010-03-11 KR KR1020117023916A patent/KR20120002585A/ko not_active Application Discontinuation
  • 2010-03-11 JP JP2011553356A patent/JP2012520539A/ja active Pending
  • 2010-03-11 WO PCT/EP2010/001544 patent/WO2010102821A1/de active Application Filing
  • 2010-03-11 EP EP10707845A patent/EP2406839A1/de not_active Withdrawn
  • 2010-03-11 CN CN2010800114799A patent/CN102349175A/zh active Pending

Patent Citations (1)

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