EP2474057A2 - Bloc-batterie et procédé de fabrication d'un bloc-batterie - Google Patents

Bloc-batterie et procédé de fabrication d'un bloc-batterie

Info

Publication number
EP2474057A2
EP2474057A2 EP10813422A EP10813422A EP2474057A2 EP 2474057 A2 EP2474057 A2 EP 2474057A2 EP 10813422 A EP10813422 A EP 10813422A EP 10813422 A EP10813422 A EP 10813422A EP 2474057 A2 EP2474057 A2 EP 2474057A2
Authority
EP
European Patent Office
Prior art keywords
mat
battery cells
pan
casting compound
battery
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.)
Withdrawn
Application number
EP10813422A
Other languages
German (de)
English (en)
Other versions
EP2474057A4 (fr
Inventor
Jürgen Jäkel
John De Roche
Robert Karg
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.)
TQ Systems GmbH
Original Assignee
Clean Mobile AG
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 Clean Mobile AG filed Critical Clean Mobile AG
Publication of EP2474057A2 publication Critical patent/EP2474057A2/fr
Publication of EP2474057A4 publication Critical patent/EP2474057A4/fr
Withdrawn legal-status Critical Current

Links

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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/42—Grouping of primary cells into batteries

Definitions

  • Battery pack and method for the manufacture of a battery pack The application relates to a battery pack and to a method for the manufacture of a battery pack.
  • Battery packs are used in mobile devices such as vehicles.
  • Battery packs contain a plurality of battery cells which are joined together mechanically in a fixed manner.
  • the battery cells are connected in series and/or in parallel such that together they provide sufficient energy for the operation of the mobile device.
  • Battery packs for vehicles are subject to special requirements. Mechanically they must be stable to ensure that they do not break up on gravel roads or cobblestones. Moreover, the battery packs must neither burn nor explode in the event of an accident in which, for example, another vehicle acts upon the battery pack with a strong mechanical impact.
  • DE 10 2007 063 187 B3 shows a battery pack, in particular for hybrid-operated motor vehicles, in which several battery cells are arranged side-by-side. The cells are connected together by a casting compound. Poles of the battery cells project out of the casting compound. The poles are subject to corrosion. A particular difficulty lies in protecting the poles of the battery cells against moisture.
  • Each of the battery cells has a top, a longitudinal side and a bottom section. Either the positive or the negative pole of the battery cell is provided on the top of the battery cell and the other pole is provided on the bottom. In addition, each of the battery cells has on opening through which the battery cell can degas in the event of a fault. A first conductor is provided for the electrical connection of the pole provided on the top of at least one of the battery cells.
  • This arrangement reduces specific risks, particularly in the case of standard accumulators.
  • Provided on the positive pole of the battery cell there is generally an opening through which gas is able to escape from the battery in the event of a fault. This is particularly important if a battery cell is overloaded. The escape of gas prevents the battery from catching fire. If the pole is cast into a mold compound, however, it is made certain whether that gas will be able to escape because the mold compound will not close the degas opening.
  • the mechanical structure provides a battery pack in which the battery pack is mechanically stable and the risk of fire is also reduced.
  • the application provides a first mat and a second mat with an upper side and an underside, said mats each having at least one opening extending from the upper side to the underside, the top sections of the battery cells being positioned on to the upper side of the first mat and the bottom sections of the battery cells being provided on the lower side of the second mat.
  • the first mat takes up a gas volume in a degas operation of a battery cell. It is not necessary that the first mat and the second mat are one continuous piece of material, the mat can also be comprised of a plurality of mat elements that are later surrounded by casting compound.
  • the mat material can have a Shore hardness 00 which lies in the range of 15 to 45.
  • the material of the first mat and the second mat can also comprise a foam, especially a polymer foam. It can comprise an open cell foam or a closed cell foam or both. In the case of a closed cell foam, the hardness can be higher because the gas of the battery can intrude into the cell structure. In the case of a closed cell foam, the hardness can be lower because the foam needs to be compressed. It is advantageous, if the mat material is elastic, because it can then regenerate after a degas.
  • the Method for providing a battery pack comprises the following steps:
  • battery cells being elongated and each having a top section, a longitudinal side and a bottom section with either the positive pole (+) or the negative pole (-) of the battery cell being provided on the top section and the other pole being provided on the bottom section of the battery cell,
  • a first compressible mat with an upper side and an underside also forms part of the assembly.
  • the first mat has holes extending from the upper side through to the underside.
  • the top sections of the battery cells are positioned on the upper side of the first mat.
  • a casting compound fills the holes in the first mat and encompasses at least part of the longitudinal sides of the battery cells. If gas emerges from the opening on the top of one of the battery cells, the first mat can be compressed to take up the additional volume of gas.
  • a first pan which is connected by bonding to the casting compound is preferably provided to receive the first mat.
  • a pan of this type protects the surrounding area from sharp casting compound edges and ensures that the casting compound is not damaged.
  • the first conductor is preferably designed as a perforated plate. As a result casting compound also passes through the first conductor, holding element it in place. In addition, during manufacture the casting compound is able to rise from below through the holes in the first mat and the first conductors upwards to the
  • the first conductor is connected by a welded connection to a positive pole on at least one of the battery cells.
  • a welded connection of this type has proved particularly robust.
  • the Shore hardness 00 lies in a range between 15 and 45.
  • a mat with a Shore hardness of this type has proved particularly suitable for taking up the additional volume of the gas whilst also being stable enough to prevent the battery cells from vibrating in the battery pack.
  • a second conductor is also provided for electrically connecting the pole provided on the bottom section to at least one of the battery cells.
  • a second compressible mat with an upper side and an underside is provided in the assembly, the second mat having holes extending from its upper side to its underside.
  • the bottom sections of the battery cells are positioned on the upper side of the second mat.
  • the assembly also contains a further casting compound which fills the holes in the second mat and encompasses at least part of the longitudinal sides of the battery cells.
  • the bottom sections of the battery cells are fixed essentially symmetrically to the top sections of the battery cells. This guarantees that the battery cells are equally mechanically loaded at both the top and the bottom and reduces the risk of cracks forming in the casting compounds.
  • battery cells are subject not only to upward and downward mechanical loads.
  • the casting compounds may also be required to absorb rotational loads.
  • a second pan which receives the second mat and is connected by bonding to the second casting compound.
  • the second casting compound is thus protected.
  • a holding element to press the first pan towards the second pan provides additional battery pack stability. If the longitudinal sides of the battery cells between the first casting compound and the second casting compound are free of casting compound, the total weight of the battery packs is lower than if they are fully cast. It also increases the mechanical stability of the battery packs even when the battery cells age. The ageing of battery cells often has the effect of causing them to expand in volume. The fact that the longitudinal sides are exposed allows the diameter of the battery cells to be increased in this free range, thereby reducing the mechanical load on both the battery cells and the casting compound. In addition, the free range allows air to circulate between the cells which allows to transport the heat from the battery cells to outside of the battery pack.
  • the positive pole is generally provided on the top of the battery cells since the openings for degassing are generally located at the positive pole.
  • the assembly has proved particularly suitable when the battery cells contain lithium ion accumulators.
  • the battery pack can also be used for other types of battery cell such as, for example, nickel metal hydride (NiMH) accumulators or electrochemical double layer capacitors (EDLC), or supercapacitors, of the appropriate shape. They may be prismatic as well as cylindrical in shape.
  • NiMH nickel metal hydride
  • EDLC electrochemical double layer capacitors
  • supercapacitors of the appropriate shape. They may be prismatic as well as cylindrical in shape.
  • a first conductor is connected to the battery cell poles provided on the top.
  • Casting compound is poured into the first pan.
  • the holding element with the battery cells is lowered such that the first conductor lies on the first mat.
  • the first casting compound is left to dry, after which the first casting compound fills the holes in the first mat and encompasses at least part of the longitudinal sides of the battery cells.
  • the battery cells With the method described it is possible firstly for the battery cells to be supported on the first mat such that it is able to take up any additional volume when the battery cells degas. Secondly the first casting compound, which also fills the holes in the first mat and encompasses part of the longitudinal sides of the battery cells, provides stability. It ensures that the battery cells are unable to vibrate.
  • the casting compound is able to spread into the holes in the first mat before the holding element for the battery cells is lowered. This ensures better distribution of casting compound.
  • the first conductor may be shaped as a perforated plate. In such an arrangement it, too, is stabilised by the casting compound which thus also flows into the holes in the first conductor. It also facilitates the flow of casting compound from the bottom section upwards to the longitudinal sides of the battery cells.
  • the first pan and the holding element are preferably shaped such that the lowering of the holding element is horizontally self-adjusting. Due to the shape of the first pan and the holding element the battery cells are provided side-by-side in such a manner that the lowering of the battery cells and the holding element ensures that they fit in only one position in the first pan.
  • the outer battery cells are arranged such that they lie adjacent to the sides of the pan. This ensures that all battery packs are of identical construction.
  • a preferred embodiment of the method also includes the following additional steps.
  • a second pan is provided with an opening to the top.
  • a second compressible mat is then laid in the second pan, said second mat being provided with an upper side and an underside.
  • the second mat has holes extending from the upper side through to the underside.
  • a second conductor is connected electrically to poles provided on the underside.
  • a second casting compound is then poured into the first pan.
  • the holding element with the battery cells is lowered such that the second conductor lies on the second mat.
  • the second casting compound is then left to dry. After this the second casting compound fills the holes in the second mat and encompasses at least part of the longitudinal sides of the battery cells.
  • This manufacturing method ensures that the top sections and the bottom sections of the battery cells are of identical construction.
  • Another holding element is then preferably provided to press the first pan towards the second pan, thereby providing additional stability for the battery pack.
  • Fig. 1 shows an exploded view of a battery pack
  • Fig. 2 shows a pan of the battery pack of Fig. 1 ,
  • Fig. 3 shows a mat to be placed in the pan of Fig. 2,
  • Fig. 4 shows a holding element for batteries of the battery pack of Fig. 1 ,
  • Fig. 5 shows a first cross section through a the battery pack of Fig. 1
  • Fig. 6 shows a further corss section through the battery pack of Fig. 1
  • Fig 7 shows a conductor layer of the battery pack of Fig. 1 ,
  • Fig 8 shows a flow diagram of a method for manufacturing the battery pack of Fig. 1 .
  • Fig 9 shows cross section through a second embodiment battery pack.
  • Fig. 1 shows an exploded view of an embodiment of a battery pack 1 .
  • the battery pack 1 comprises an aluminium base plate 2 on which is placed a first pan 3 with an opening to the top. Located in this first pan 3 is a first mat 4 on which are placed the top sections of elongated battery cells 6.
  • the battery cells 6 are shown upside down.
  • the top sections 61 of the battery cells 6 are shown at the lower portion of Fig. 1 , while the bottom sections 63 are shown at the upper portion of Fig. 1.
  • the positive poles are provided at the top sections 61
  • the negative poles are provided at the bottom sections 63.
  • the sides of the essentially cylindrical battery cells are referred to as longitudinal sides 62.
  • Fig. 1 shows two essentially flat holding elements 5 and 7, also called “holding layers", one below and one above the batteries 6.
  • the holding elements maintain radial pre-determined distances between neighboring battery cells 6.
  • the battery cells 6 When assembled, the battery cells 6 are inserted into openings of these holding elements 5 and 7 such that the holding elements 5 and 7 are provided at the level of the longitudinal sides 62.
  • the batteries are held in place by these holding elements 5 and 7 during assembly of the battery pack 1 and remain in the battery pack 1 after assembly. In an embodiment not shown here, the holding elements 5 and 7 are removed after assembly of the battery pack.
  • a second mat 8 which is embedded in the second pan 9 which opens towords the first pan 3.
  • Structured conductive layers, also called conductors 17 and 87, are not shown in Figure 1 , they can best seen in Figures 5, 6 and 7.
  • the conductors 17 are provided between the top sections 61 of the battery cells 6 and the first mat 4 in order to connect positive poles of pre-determined groups of battery cells 6 together. In one embodiment, these conductors 17 are designed as longitudinal and perforated copper plates being welded to the positive poles of the battery cells 6.
  • Conductors 87 are provided between the negative poles on the bottom sections 63 of the battery cells 6 and the second mat 8 and they are connecting negative poles of predetermined groups of batteries 6.
  • each of the conductors 17 and 87 Soldered to each of the conductors 17 and 87 are cables - not shown here - which lead to PCBs, also called boards 100 and 1 10, of the battery pack.
  • PCBs also called boards 100 and 1 10, of the battery pack.
  • voltage converters and control chips are also connected to a plug 13 which is fitted at an opening 130 in the battery pack 1 . Contact with the voltage converter and the control chip on the boards 100 and 1 10 can thus be made from outside the battery pack 1 .
  • a mechanical clamping system for the batteries 6, comprising sleeves 14, longitudinal struts 12, transverse struts 1 1 , and bolts 15 is provided.
  • the sleeves 14 run in parallel to the longitudinal axis of the battery cells 6 and they fit into indents 30 in the first pan 3 and into indents 90 in the second pan 9.
  • the bolts 15, only one of which is shown for the sake of clarity, pass through the transverse struts 1 1 , through the longitudinal struts 12 and through the sleeves 14 into threaded segments, also called nuts 16, on the base plate 2.
  • the first pan 3 and the second pan 9 are pressed together by the mechanical clamping system, thereby providing additional stability for the battery pack.
  • a cover 10 is provided which is screwed to the base plate 2 such that the base plate 2 together with the cover 10 and a side cover 120 form a housing for taking up the components of the battery pack as specified above.
  • the Fig. 1 does not show a first casting compound by which the first pan 3, the first mat 4 and the battery cells 6 are connected together and it does also not show a second casting compound which connect the batteries 6, the second mat 8 and the second pan 9 together.
  • the position of the casting compound which is a curable material such as filled epoxy resin, will be explained with reference to Figs. 5 and 6.
  • Fig. 2 shows a side view, a top view and an angled view of the first pan 3.
  • the first pan 3 has external dimensions of approx. 16 cm x 20 cm x 1 .6 cm, whereby the height is about 1 .6 cm.
  • the first pan 3 is stepped such that the surface area of the opening of the pan 3 is wider than the surface area of the base of the pan 3.
  • the indents 30 have a radius of about 7.5 mm.
  • the dimensions may of course vary according to the number and size of the battery cells 6 to be taken up.
  • the shape and size of the second pan 9 are the same as those of the first pan 3.
  • the height of the second pan 9 is about 1.6 cm, wheras the height of the first pan 3 is about 4.6 cm, whereby the other sizes of the pans 3 and 9 are the same as shown in Figure 3.
  • the sidewalls of the first pan 3 and of the second pan 9 provide a closed cover for the battery cells in order to protect them from water or dirt.
  • Fig. 3 shows a top view of the first mat 4.
  • the first mat 4 has external dimensions of approx. 14.4 cm x 18.6 cm. Its outer dimensions are chosen such that it can just be positioned in the first pan 3.
  • the first mat 4 is perforated, the diameter of the openings 140 being about 12 mm. The diameter of the openings 140 are
  • the openings 140 should not be too small in diameter.
  • the openings 140 are positioned in rows and these rows are spaced approx. 17 mm apart. The rows are offset in relation to one another such that the distance between two holes in different rows is about 20 mm. The distance between holes in the same row is also about 20 mm. These distances are measured from the centre points of the circular openings 140.
  • the mat 4 is made of an elastic and
  • compressible material especially from open or closed foam resin.
  • the diameter of the openings 140 in the perforated first mat is about 8 mm, whereby the number of openings and the positions of the centers of the openings are the same as in Figure 3.
  • Fig. 4 shows the holding element 5 which receives the batteries 6.
  • the holding element 5 has external dimensions of about 194 mm x 161 mm.
  • the holding element 5 is provided as a perforated mat.
  • Holes 141 in the holding element 5 are provided in twelve rows and each hole has a diameter of about 17.6 mm.
  • the diameter of the holes 141 is chosen such that the battery cells, which also have a diameter of 17.6 mm, are firmly held.
  • the distance between two holes 141 in the same row and between neighbouring holes 141 in different rows is 20 mm.
  • the holding element 5 serves not only to maintain the distances between the battery cells 6 but also to protect cells from flying particles which may originate from other cells in the case of an explosion or other thermal destruction.
  • the holding element 5 is therefore preferably made of a non-flammable material.
  • the height of the holdings element 5 can also be chosen such that the bigger part of the longitudinal sides 62 of the battery cells 6 is covered.
  • Fig. 5 shows a cross-section of the battery pack of Fig. 1 in an assembled state. Only two battery cells 6 of the many battery cells 6 are shown. They are arranged such that their top sections 61 are pointing downwards. Provided in the centre of each top sections 61 is an electrode 65 for the positive pole of the battery 6. In the upper part of Fig. 5, the first holding element 5 of Figs. 4 and 1 can be seen.
  • degas openings 64 Located to the right and left of this electrode 65 are provided degas openings 64.
  • degas openings 64 allow to escape gas from the inside of a battery cell 6 in the event of a battery fault.
  • membranes Located inside the battery cells 6 behind these openings degas 64 are membranes through which the gas is able to pass in the event of a fault.
  • a protective film 66 which extends first along the top sections 61 and then along the longitudinal sides 62.
  • the protective film 66 protects the inside of the battery cells from moisture.
  • the conductor layer 17 which is welded to the electrodes 65. The electrodes and the conductor layer 17 are thus electrically connected with each other.
  • the conductor layer 17 has openings 170 which are indicated in the Figure 5 with dotted lines in the sectional view. Outside the sectional plane, however, the part of the conductor layer 17 shown below the left-hand battery cell 6 is electrically and mechanically connected to the part of the conductor layer 17 provided below the right-hand battery cell. Thus Fig. 5 shows only one of the many conductors 17. In the sectional plane, the conductor layer 17 has essentially the same width as the diameter of the battery cells 6.
  • the conductor layer 17 is provided with a plurality of H-shaped gas conduct openings 171 below the battery cells 6, whereby the gas conduct openings 171 are indicated by dotted lines in Fig. 5.
  • the gas conduct openings 171 provide gas channels in the conductor layer 17 which lay close to the degas openings 64 of the battery cells 64. These gas conduct openings 171 thereby provide a path for the gas to expand from the battery cells into the first mat 4.
  • the first mat 4 is provided as a porous material to provide an extended degas space.
  • the conductor layer 17 lies on the first mat 4.
  • the first mat 4 comprises an upper side 41 and an underside 42. In the sectional plane as shown in Fig.
  • the first mat 4 also has an opening 140 extending from the upper side 41 to the underside 42. Located below the first mat 4 is the first pan 3.
  • a casting compound 18 which extends upwards from the upper side of the first pan 3 and also encompasses the battery cells 6 laterally in a region 630 is provided.
  • the region 630 is, for example, 10 mm high.
  • the openings 170 and 140 are filled with the casting compound 18.
  • casting compound 18 provided between the first mat 4 and the first pan 3 where they overlap. Portions of the casting compound 18 are also located between the conductor 17 and the horizontal part of the insulating film 66. The distance between the insulating film 66 and the conductor 17 is only I00 nm or a couple of hundred nm thick.
  • Fig. 6 shows the two battery cells 6 of Fig. 5, though only the bottom sections 63 of the battery cells 6 adjacent to the second pan 9 are illustrated here.
  • the second holding element 7 of Fig. 1 is shown.
  • the second holding element 7 is essentially identical with the first holding element 5.
  • the bottom section 63 of the battery cell 6 comprises an electrode 68 which is connected to the conductor layer 87 which is located just above it.
  • the conductor layer 87 is located under the second mat 8 which is itself is located under the second pan 9.
  • the casting compound 88 extends downwards from the second pan 9 so that it also surrounds parts of the sides of the battery cells 6 in the region 632 and 633. No degas openings are provided in the bottom sections 63 of the battery cells.
  • the shape and size of the negative poles are the same as those of the positive poles of the battery cells 6.
  • the positive and negative poles are thus both fixed to the respective conductor layers 17 and 87 and the respective first pan 3 and second pan 9 in an essentially identical manner and they are subject to essentially identical mechanical loads.
  • the battery cells are each about 6 cm long. If the regions 630, 631 , 632 and 633 are each only 1 cm high, a section of about 4 cm in the middle of the longitudinal sides 62 remains free of casting compound.
  • the battery cells 6 which are preferably cylindrical in shape are able to radially expand in this free region. In one embodiment not shown here, air may circulate in the free region which makes it possible that heat produced by the battery cells may be transported to the outside of the battery pack. This enhaces the cooling of the battery pack.
  • Fig. 7 shows a top view of a conductor layer 17.
  • the conductor layer 17 is designed as a plate which comprises a plurality of circular openings 170 and a plurality of H-shaped holes 171 .
  • the circular openings 170 are preferably provided vertically above the openings 140 in the first mat 4.
  • the still liquid casting compound 18 is thus able to expand into the openings 140 and 170 so as to later form rigid vertical columns which then run continuously through the openings 140 and 170.
  • the H-shaped gas conduct openings 171 are provided especially at locations where the conductor layer 17 is welded to the battery cells.
  • the dotted lines over the H-shaped holes indicate the positions in which the degas openings 64 of the battery cells 6 are provided.
  • the conductor layers 87 for the bottom sections of the battery cells 6 are structured in the same manner as the conductor layers 17.
  • a total of eleven conductor layers 17 are provided for the lower section of the battery pack 1 and eleven conductor layers 87 are provided at the upper section of the battery pack 1 .
  • the battery cells 6 are grouped into 1 1 blocks.
  • a cable connection from the boards 100 and 1 10 is provided to each of the conductor layers 17 and 87 .
  • Battery cells 6 which are connected to two corresponding conductor layers 17, 87, one at the top and one at the bottom, may be regarded as one battery block.
  • the conductors 17 are all connected to positive poles of the battery cells 6, whereas the conductors 87 are all connected to negative poles of the battery cells 6. It may depend on the circuitry on the boards 100 and 1 10 how the battery blocks are connected. In one embodiment not shown here, the battery blocks are connected in series. In a further
  • the battery blocks are connected in parallel.
  • the conductor Iayers17 are connected to both positive and negative poles since some of the battery cells 6 are connected in series.
  • Fig. 8 illustrates a method for the manufacture of a battery pack 1 as disclosed in Fig. 1 with a flow diagram.
  • a first step 800 battery cells 6 are introduced into holding elements 5 and 7.
  • the conductor layers 17 are then welded to the pre-determined poles on the top sections 61 of the battery cells 6 and the conductor layers 87 to the pre-determined poles on the bottom sections 63.
  • a first pan 3 is then placed in position with its opening to the top (step 820).
  • the first mat 4 is laid in the first pan 3 and still liquid casting compound 18 is poured into the first pan 3 in step 820.
  • the battery cells 6 with the holding element 5 are then lowered onto the first mat 4 with the top sections of the battery cells 6 pointing upwards (step 830). Further liquid casting compound is then poured into the first pan 3 in step 840 to provide the casting compound 18 with its respective height as shown in figure 5.
  • the hardened casting compound 18 is present in the inside of the first pan 3, in the openings 140 of the first mat 4, in the openings 170 of the conductor layer 17 and laterally on the longitudinal sides 62 of the battery cells 6.
  • the casting compound 18 is then left to harden (step 850).
  • a second second pan 9 is placed in position with its opening to the top in step 860.
  • a second mat 8 is then placed into the second pan 9.
  • Liquid casting compound 88 is poured into the second pan 9 in step 870.
  • the cured block with the battery cells 6 (after step 850) is rotated upside down and the as yet uncast side is lowered onto the second mat 8 (step 880). Further casting compound 88 is then poured into the first pan 3 and the casting compound 88 is left to harden.
  • the liquid casting compound can be supplied through the free space between the sidewalls of the first pan 3 and the second pan 9, in order to fill enough casting compound into the second pan 9.
  • Figure 9 shows a section of a further embodiment of a battery pack 1 in an assembled state.
  • the openings 170' in the conductor layer 17 are smaller in diameter than the openings 170 shown in Figure 5. Further, the openings 140' in the first mat 4 are smaller in diameter than the openings 140 shown in
  • the volume in which the gas may flow by compressing the first mat 4' is larger than the respective volume in Figure 5.
  • the openings 140' and 170' have to be large enough to ensure that the casting compound 18' flows from the bottom of the pan 3' to the regions 630' and 631 '.
  • the battery cell 6 degases through the degas opening 64.
  • the casting compound 18 between the degas opening 64 and the opening 171 and the casting compound 18 in the opening 171 will be shifted away due to the pressure of the escaping gas.
  • the gas will then flow through the gas conduct openings 171 to the first mat 4 which is compressed.
  • the compression allows the gas to stay in the space left by the compressed first mat 4.
  • the battery pack 1 is prevented from exploding or burning.
  • the casting compound 18 at the sidewalls of the battery cells ensure that the battery cells 6 are fixed in the battery pack 1 . Even in case of a mechanical impact, the battery cells 6 stay in a fixed position.
  • the rigid columns that are provided by the casting compound 18 through the openings 140 and 170 ensure that the battery cells keep their postions with respect to the pan 3. If a section in the middle of the longitudinal sides 62 of the battery cells 6 remains free of casting compound 18, air may circulate to support the cooling of the battery cells 6. This circulation may, in one embodiment, be supported by a ventilator. Further, in this middle section, the battery cells 6 may freely expand in diameter. If a battery cell 6 is charged and discharged, the diameter of the cell changes.

Landscapes

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

Abstract

La présente invention concerne un ensemble comprenant une pluralité d'éléments de batterie allongés (6). Chacun des éléments de batterie (6) présente une partie supérieure (61), un côté longitudinal (62) et une partie inférieure (63). Le pôle positif ou bien le pôle négatif de l'élément de batterie (6) est situé sur la partie supérieure tandis que l'autre pôle est situé sur la partie inférieure de l'élément de batterie (6). En outre, les éléments de batterie ont chacun une ouverture (64) sur la partie supérieure par laquelle l'élément de batterie peut dégazer en cas d'anomalie. Un premier conducteur (17) est prévu pour connecter électriquement le pôle situé sur la partie supérieure d'au moins un des éléments de batterie. Une première nappe électrique (4) présentant un côté supérieur et un côté inférieur fait également partie de l'ensemble. La première nappe (4) comporte des orifices (140) s'étendant depuis le côté supérieur et traversant le côté inférieur. Les surfaces de partie supérieure (61) des éléments de batterie sont positionnées sur le côté supérieur (41) de la première nappe (4). Un composé de moulage (17) comble les orifices de la première nappe et entoure au moins partiellement les côtés longitudinaux des éléments de batterie (6).
EP20100813422 2009-09-04 2010-09-04 Bloc-batterie et procédé de fabrication d'un bloc-batterie Withdrawn EP2474057A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009040128.8A DE102009040128B4 (de) 2009-09-04 2009-09-04 Batteriepack und Verfahren zum Herstellen eines Batteriepacks
PCT/IB2010/053987 WO2011027328A2 (fr) 2009-09-04 2010-09-04 Bloc-batterie et procédé de fabrication d'un bloc-batterie

Publications (2)

Publication Number Publication Date
EP2474057A2 true EP2474057A2 (fr) 2012-07-11
EP2474057A4 EP2474057A4 (fr) 2014-09-17

Family

ID=43536083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100813422 Withdrawn EP2474057A4 (fr) 2009-09-04 2010-09-04 Bloc-batterie et procédé de fabrication d'un bloc-batterie

Country Status (3)

Country Link
EP (1) EP2474057A4 (fr)
DE (2) DE102009040128B4 (fr)
WO (1) WO2011027328A2 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011002203A1 (de) * 2011-04-20 2012-10-25 Clean Mobile Ag Batteriepaket und Verfahren zur Herstellung eines Batteriepakets
DE102011109918A1 (de) * 2011-08-10 2013-02-14 Audi Ag Verfahren zum Bauen einer Energieversorgungseinrichtung sowie Modul
FR2986657B1 (fr) * 2012-02-03 2014-01-31 Batscap Sa Entretoise de positionnement, module de stockage d'energie l'ayant et procede d'assemblage du module
DE102013222002A1 (de) 2013-10-29 2015-04-30 Volkswagen Aktiengesellschaft Batterie mit einer Mehrzahl von Batteriezellen und Fahrzeug
US20160093851A1 (en) * 2014-09-30 2016-03-31 Johnson Controls Technology Company Battery module with individually restrained battery cells
DE102017204412A1 (de) * 2017-03-16 2018-09-20 Audi Ag Batterie für ein Kraftfahrzeug und Kraftfahrzeug
FR3071671B1 (fr) * 2017-09-22 2022-02-18 Tyva Energie Batterie electrique
WO2020074790A1 (fr) 2018-10-09 2020-04-16 Tyva Energie Batterie électrique
EP3736876A1 (fr) * 2019-05-10 2020-11-11 Andreas Stihl AG & Co. KG Bloc d'accumulateur, système d'usinage et procédé de fabrication d'un bloc d'accumulateur
EP3736875A1 (fr) * 2019-05-10 2020-11-11 Andreas Stihl AG & Co. KG Bloc d'accumulateur, système d'usinage et procédé de fabrication d'un bloc d'accumulateur
EP3761389A1 (fr) * 2019-07-01 2021-01-06 Hilti Aktiengesellschaft Bloc d'accumulateur pour une machine-outil portative électrique et procédé
DE102021100369A1 (de) 2021-01-12 2022-07-14 Audi Aktiengesellschaft Batteriezellenanordnung mit einer wärmeleitenden, elektrisch isolierenden Isolierschicht, Kraftfahrzeug und Verfahren zum Bereitstellen einer Batteriezellenanordnung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1107336A2 (fr) * 1999-11-30 2001-06-13 Sony Corporation Batterie à électrolyte nonaqueux
WO2008074034A1 (fr) * 2006-12-14 2008-06-19 Johnson Controls - Saft Advanced Power Solutions Llc Module de batterie

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5977746A (en) * 1998-07-21 1999-11-02 Stryker Corporation Rechargeable battery pack and method for manufacturing same
JP3848565B2 (ja) * 2001-11-27 2006-11-22 松下電器産業株式会社 電池間接続構造および電池モジュール並びに電池パック
US6972544B2 (en) * 2003-10-14 2005-12-06 Black & Decker Inc. Apparatus for interconnecting battery cells in a battery pack and method thereof
DE102007010738B4 (de) * 2007-02-27 2012-01-26 Daimler Ag Leiterplattenschutz für eine Batterie und Verwendung der Batterie
DE102007063187B3 (de) * 2007-12-20 2009-04-02 Daimler Ag Batterie mit einer Kühlplatte und Verfahren zur Herstellung einer Batterie
DE102008009041A1 (de) * 2008-02-14 2009-08-20 Valeo Klimasysteme Gmbh Antriebsbatteriebaugruppe eines Elektro-, Brennstoffzellen- oder Hybridfahrzeugs
DE102008010838A1 (de) * 2008-02-23 2009-08-27 Daimler Ag Batterie mit einem Batteriegehäuse und einer Wärmeleitplatte zum Temperieren der Batterie

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1107336A2 (fr) * 1999-11-30 2001-06-13 Sony Corporation Batterie à électrolyte nonaqueux
WO2008074034A1 (fr) * 2006-12-14 2008-06-19 Johnson Controls - Saft Advanced Power Solutions Llc Module de batterie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2011027328A2 *

Also Published As

Publication number Publication date
WO2011027328A3 (fr) 2011-11-17
WO2011027328A2 (fr) 2011-03-10
EP2474057A4 (fr) 2014-09-17
DE102009040128A1 (de) 2011-03-10
DE102009040128B4 (de) 2014-04-30
DE202010017245U1 (de) 2011-06-09

Similar Documents

Publication Publication Date Title
WO2011027328A2 (fr) Bloc-batterie et procédé de fabrication d'un bloc-batterie
CN110710019B (zh) 具有提高的空间利用率和安全性的圆柱形电池单元组件及包括该圆柱形电池单元组件的电池模块
US6074774A (en) Sealed recharge battery plenum stabilized with state changeable substance
US9614211B2 (en) Lithium ion battery having desirable safety performance
EP0789411B1 (fr) Accumulateur étanche
EP2325923B1 (fr) Bloc-batterie à stabilité améliorée
US9083029B2 (en) Battery pack
KR100700277B1 (ko) 카트리지 타입의 전지팩
US20110262799A1 (en) Battery pack
EP2816633B1 (fr) Appareil de stockage d'énergie
EP2328201A1 (fr) Bloc-batteries
CA2751053A1 (fr) Cartouche de pile a structure de filet de connexion entre pile composite
US20070148542A1 (en) Battery electrode design and a flat stack battery cell design and methods of making same
JP2018512720A (ja) 電池ブロックおよび電池ブロックの製造方法
CN104112836B (zh) 可再充电电池
KR20130076731A (ko) 전원 장치
US5549981A (en) Electrochemical storage device
CN112753123A (zh) 钠二次电池模组
CN105027321A (zh) 包括电池单元隔板的可充电电池
EP2015322A1 (fr) Module de condensateur avec transmission thermique optimisée
KR101124963B1 (ko) 이차전지 모듈
EP2822063B1 (fr) Appareil de protection d'un bloc-batterie et procédé de fabrication dudit appareil
KR100928122B1 (ko) 이차전지
KR20160141209A (ko) 배터리 팩
JP7460777B2 (ja) バッテリーモジュール、それを含むバッテリーパック及び自動車、並びにバッテリーパックを製造する方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120518

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KARG, ROBERT

Inventor name: JAEKEL, JUERGEN

Inventor name: DE ROCHE, JOHN

DAX Request for extension of the european patent (deleted)
19U Interruption of proceedings before grant

Effective date: 20120404

19W Proceedings resumed before grant after interruption of proceedings

Effective date: 20140801

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TQ-SYSTEMS GMBH

A4 Supplementary search report drawn up and despatched

Effective date: 20140820

RIC1 Information provided on ipc code assigned before grant

Ipc: H01M 2/12 20060101ALI20140813BHEP

Ipc: H01M 6/42 20060101ALI20140813BHEP

Ipc: H01M 2/10 20060101AFI20140813BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20150619

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20151030