ARRANGEMENT AND METHOD FOR ELECTRICAL CONNECTION

Description

[0001] The present invention relates to an electrical interconnection assembly of a battery system, in particular for a vehicle at least partially powered by an electric battery.

[0002] The invention relates in particular to the construction of a battery, especially for an electric vehicle. A "battery" is defined as a plurality of electrochemical cells electrically connected to one another. In a particular example of a battery, the plurality of electrochemical cells is arranged in the form of one or more battery modules, each battery module comprising several electrochemical cells electrically connected to one another and mechanically assembled by an assembly system, such as assembly plates. An electrochemical cell comprises, in particular, a stack of positive electrodes connected to one another and a stack of negative electrodes connected to one another, separated by a separator, known as a "stack."The positive electrodes connected to each other form a positive terminal, and the negative electrodes connected to each other form a negative terminal.

[0003] For electrical transmission between two battery modules, it is known to connect electrically and mechanically a connecting piece between the two modules.

[0004] For example, the connecting piece is divided into two parts and each of the two parts is welded to one of the two battery modules, so as to electrically connect the two battery modules.

[0005] US 2007 / 111088 A1 describes such a connecting piece. However, such a connecting piece does not provide complete satisfaction.

[0006] Indeed, such a connection can only be disassembled by destroying the connecting piece, which reduces the modularity of the connections between the modules. Furthermore, such disassembly could damage one of the battery modules.

[0007] US 2020 / 067059 A1 describes a connecting piece for the seamless assembly of two ultrathin electrochemical cells.

[0008] In addition, the connecting piece is usually initially fixed to one of the battery modules, and then subsequently fixed to the other battery module, for example on a different production line.

[0009] The battery module, to which the connector is already attached, must therefore be transported with the connector protruding from one edge of the battery module. This increases the transport volume, which has economic disadvantages. Furthermore, the connector is at risk of being damaged during transport.

[0010] One of the aims of the invention is to overcome these drawbacks by providing an electrical interconnection system allowing modular connection of the electrical components of an electric battery system, while remaining simple and compact.

[0011] For this purpose, the invention relates to an interconnection set according to claim 1.

[0012] According to particular embodiments, the assembly comprises one or more of the following optional features, corresponding to claims 2 to 12 taken individually or in all technically possible combinations.

[0013] The invention also relates to an electrical connection method according to claim 13.

[0014] The invention will be better understood upon reading the following description, given solely by way of non-limiting example, and made with reference to the accompanying drawings, in which: therefigure 1 is a schematic perspective view of an interconnection assembly according to a first embodiment of the invention, the connecting piece being in a folded position; the figure 2 is a schematic perspective view of the interconnection assembly shown on the figure 1 with the connecting piece in the unfolded position; the figure 3 is a cross-sectional view along a vertical cutting plane of the connecting piece shown on the figure 1 ; there figure 4 is a schematic perspective view of an interconnection assembly according to a second embodiment of the invention; the figure 5 is a view centered on the connecting piece of the interconnection assembly shown on the figure 4 ; there figure 6 is a schematic perspective view of an assembly according to a third embodiment of the invention; and the figure 7 is a view centered on the connecting piece of the interconnection assembly shown on the figure 6 .

[0015] With reference to figures 1 à 3 , we describe an interconnection set 10 according to a first embodiment of the invention.

[0016] The interconnection assembly 10 includes a first electrical component 12, a second electrical component 14 and a first connecting piece 16 intended to allow an electrical connection between the first component 12 and the second component 14.

[0017] Each of the first component 12 and the second component 14 are electrical components of a vehicle battery system intended to equip a vehicle at least partially powered by electric battery propulsion energy.

[0018] The first component 12 is an electrochemical cell or a battery module comprising one or more electrochemical cells electrically connected to each other and mechanically assembled to each other.

[0019] The second component 14 is for example an electrochemical cell, a battery module comprising one or more electrochemical cells electrically connected to each other and mechanically assembled to each other by an assembly system, an interconnection bar (or bus bar or "busbar" according to English terminology), an electronic control board of a battery system or any other electronic component of a battery system.

[0020] In a particular example illustrated on the Figure 1 , the first component 12 and the second component 14 are two battery modules and the connecting piece 16 is configured for the electrical connection of these two battery modules.

[0021] The first component 12 and the second component 14, formed of battery modules, each comprise at least one electrochemical cell (not visible), and in particular a plurality of electrochemical cells electrically connected to each other and mechanically assembled.

[0022] As illustrated on the figures 1 And 2 In general, each of the first component 12 and the second component 14 includes at least one electrical connection terminal 28.

[0023] The electrical connection terminal 28 of the first component 12 and the electrical connection terminal 28 of the second component 14 are spaced apart from each other in a connection direction X-X'.

[0024] Preferably, the electrical connection terminal 28 of the first component 12 and the electrical connection terminal 28 of the second component 14 extend in line with each other in the connection direction X-X'.

[0025] The first component 12 and the second component 14 are, for example, arranged next to each other according to the connection direction X-X'.

[0026] In a particular embodiment, and especially when the second component 14 is also an electrochemical cell or a battery module, each of the first component 12 and the second component 14 defines an upper face 24 and a lower face (not visible) opposite to each other along a direction ZZ' perpendicular to the connection direction X-X', the direction ZZ' being for example vertical.

[0027] The upper faces 24 of the first component 12 and of the second component 14 extend parallel to each other and are spaced along the connection direction XX' by a distance D, measured along the connection direction XX' and for example between 0 mm and 50 mm.

[0028] In one embodiment, where the second component 14 is also an electrochemical cell or a battery module, the electrical connection terminal 28 of each of the first component 12 and the second component 14 is arranged for example on the upper face 24 of the corresponding component 12, 14.

[0029] Alternatively, the electrical connection terminal 28 of the first component 12 is located on one side of the first component 12 and / or the electrical connection terminal 28 of the second component 14, in particular if it is formed of an electrochemical cell or a battery module, is located on one side of the second component 14

[0030] The electrical connection terminal 28 of each of the first component 12 and the second component 14 is an area allowing the flow of an electric current.

[0031] The electrical connection terminal 28 of the first component 12 and the electrical connection terminal of the second component 14 allow current to flow between the first component 12 and the second component 14 when they are electrically connected to each other.

[0032] The first connecting piece 16 includes a first fixing portion 30, a second fixing portion 32 and a linking portion 34 mechanically and electrically linking the first fixing portion 30 and the second fixing portion 32.

[0033] The first fixing portion 30, the second fixing portion 32 and the connecting portion 34 are preferably made of material, that is to say made entirely from a single piece of material.

[0034] The first connecting piece 16 is advantageously made of a material having good electrical conductivity, i.e., an electrical conductivity σ equal to or greater than 7.10⁶ Sm⁻¹ (siemens per meter). The material with good electrical conductivity is preferably aluminum or copper.

[0035] The first portion of the fixing 30 is mechanically connected to the first component 12 and electrically to the electrical connection terminal 28 of the first component 12.

[0036] For this purpose, the first portion of the fixing 30 is preferably welded onto the first component 12.

[0037] In particular, the first fastening portion 30 is for example welded to the electrical connection terminal 28 of the first component 12. This ensures an electrical connection of the first fastening portion 30 to the electrical connection terminal 28 of the first component 12 and a mechanical assembly of the first fastening portion 30 to the first component 12.

[0038] As can be seen on the figure 2 , the first fixing portion 30 includes, for example, a central part 36 and two lateral parts 38 extending on either side of the central part 36 in a transverse direction YY' perpendicular to the connection direction X-X'.

[0039] The central part 36 is in direct contact with the electrical connection terminal 28 of the first component 12 and ensures the electrical connection between the first connecting piece 16 and the first component 12.

[0040] The central part 36 is in particular welded to the electrical connection terminal 28 of the first component 12.

[0041] Each side part 38 is optionally configured to provide mechanical support of the first fixing portion 30 on the electrical connection terminal 28 of the first component 12, for example a wedge along the transverse direction Y-Y'.

[0042] The first fixing portion 30 includes, for example, a first transverse edge 40 linked to the connecting portion 34 and a second transverse edge 42 opposite to the first transverse edge 40 along the connection direction X-X'.

[0043] Optionally, the second transverse edge 42 is beveled at one or both of its transverse ends. This can serve as a keying feature during assembly operations, for example.

[0044] As can be seen on the figure 2 , the second portion of the fixing 32 has, for example, a substantially rectangular shape.

[0045] The second fixing portion 32 includes, for example, a first transverse edge 44 linked to the connecting portion 34 and a second transverse edge 46 opposite to the first transverse edge 44 along the connection direction X-X'.

[0046] Optionally, the second transverse edge 46 is beveled at one or both of its transverse ends. This can serve as a keying feature during assembly operations, for example.

[0047] According to a particular embodiment of the invention illustrated in the figures 1 And 2 , the second fixing portion 32 defines a fixing orifice 48, preferably oblong in shape along the connection direction X-X'.

[0048] As illustrated on the figure 2 , the fixing hole 48 allows the mechanical fixing of the second fixing portion 32 on the electrical connection terminal 28 of the second component 14, for example by means of an elongated fixing element, such as a screw, or bolt or rivet, inserted through the fixing hole 48.

[0049] On the figure 2 The second mounting portion 32 is fixed to the electrical connection terminal 28 of the second component 14 by means of a screw 50 received in the mounting hole 48 to mechanically connect the second mounting portion 32 to the second component 12, as illustrated in the figure 2 .

[0050] As an optional addition or alternative, the second fixing portion 32 can be fixed to the electrical connection terminal 28 of the second component 14 by other means, as will be indicated later.

[0051] The connecting portion 34 of the first connecting piece 16 extends between the first fixing portion 30 and the second fixing portion 32, and more particularly between the first transverse edge 40 of the first fixing portion 30 and the first transverse edge 44 of the second fixing portion 32.

[0052] As illustrated on the figures 1 And 2 , the connecting portion 34 is for example delimited by two transverse folds 52. Each of the two transverse folds 52 connects the connecting portion 34 respectively with the first fixing portion 30 and the second fixing portion 32, and extends respectively along the first transverse edge 40 of the first fixing portion 30 and along the first transverse edge 44 of the second fixing portion 32.

[0053] The connecting portion 34 is advantageously more flexible than the first fixing portion 30 and the second fixing portion 32 in bending around the transverse direction Y-Y'.

[0054] The connecting portion 34 exhibits an angular stiffness around the transverse direction YY' strictly higher than that of each of the first connection position 30 and the second connecting portion 32.

[0055] The connecting portion 34 is a preferred folding zone for the first connecting piece 16 around the transverse direction Y-Y'. During a folding of the first connecting piece 16 around the transverse direction Y-Y', the first connecting piece 16 tends to fold preferentially in its connecting portion 34.

[0056] Thanks to the flexibility in bending around the transverse direction YY' of the connecting portion 34, which is higher than that of each of the first fixing portion 30 and the second fixing portion 32, the first connecting piece 16 is movable relative to the first component 12 between a folded position (represented on the figure 1 ) and an unfolded position (represented on the figure 2 ) by folding, or conversely by unfolding, the connecting portion 34 around the transverse direction Y-Y'.

[0057] For example, the folding, reciprocally the unfolding, of the connecting portion 34 is carried out by folding, reciprocally unfolding, of each of the transverse folds 52 around the transverse direction Y-Y'.

[0058] Advantageously, the folding, and conversely the unfolding, of the connecting portion 34 around the transverse direction YY' can be carried out manually by an operator.

[0059] In particular, the folding of the connecting portion 34 requires a folding force between 0.1 daN and 10 daN, in particular between 1 daN and 5 daN, in particular between 2 daN and 4 daN.

[0060] In addition, the first connecting piece 16 is advantageously designed so as to allow at least 10 foldings, reciprocally unfoldings, of the connecting portion 34, without breaking.

[0061] In the folded position as illustrated on the figure 1 The second fixing portion 32 extends on the side of the first fixing portion 30 relative to the connecting portion 34 in the connection direction X-X'. The second fixing portion 32 extends, for example, substantially above the first fixing portion 30 in the direction Z-Z'.

[0062] Advantageously, in the folded position, the two transverse folds 52 of the connecting portion 34 extend substantially one above the other.

[0063] Alternatively, the second portion of the fixing 32 in the folded position extends substantially perpendicularly to the first portion of the fixing 30.

[0064] Preferably, in the folded position, the second fastening portion 32 is able to assume each of the positions between the position illustrated on the figure 1 in which it extends above the first portion of the fixing 30 and between the position in which it extends perpendicularly to the first portion of the fixing 30.

[0065] In the folded position, the connecting portion 34 preferably has an arched shape between the two transverse folds 52. It thus defines a gutter extending between the two transverse folds 52 along the direction Z-Z'.

[0066] In the folded position, the second fastening portion 32 is not in contact with the second component 14. The second fastening portion 32 is then mechanically and electrically disconnected from the second component 14.

[0067] In the folded position, the first connecting piece 16 is therefore not in position to electrically connect the first component 12 and the second component 14.

[0068] In the unfolded position as illustrated on the figure 2 , the second fixing portion 32 extends in the continuation of the first fixing portion 30 along the connection direction X-X'.

[0069] In the unfolded position, the connecting portion 34 advantageously extends between the first component 12 and the second component 14. The connecting portion 34 preferably retains an arched shape between the two transverse folds 52. The connecting portion 34 thus defines a gutter extending between the two transverse folds 52 along the connection direction X-X'.

[0070] In the unfolded position, the second fixing portion 32 is able to come into contact with the second component 14, and more particularly with the electrical connection terminal 28 of the second component 14.

[0071] The second fixing portion 32 is thus adapted to be mechanically connected to the second component 14 and electrically to the electrical connection terminal 28 of the second component 14.

[0072] Preferably, in the unfolded position, the second fastening portion 32 is suitable for being mechanically connected in a removable manner to the second component 14.

[0073] For this purpose, a fastener such as a screw 50 is advantageously inserted into the fastening hole 48 to mechanically connect the second fastening portion 32 to the second component 14, as illustrated in the figure 2 .

[0074] Alternatively, the second fastening portion 32 is snapped or glued onto the second component 14.

[0075] Each of the first portion of the fixing 30 and the second portion of the fixing 32 is, for example, substantially flat and extends between two horizontal planes.

[0076] The first fixing portion 30 and the second fixing portion 32 advantageously have substantially the same thickness. Thickness is defined as the distance measured along the direction ZZ' between the two corresponding horizontal planes. The thickness of each of the first fixing portion 30 and the second fixing portion 32 is, for example, between 0.5 mm and 5 mm.

[0077] In one embodiment example, the first connecting piece 16 is a plate which is shaped.

[0078] The term "shaping" refers to the processes of shaping materials, including shaping processes with material removal, such as machining and cutting, and shaping processes without material removal, such as stamping, forming and punching.

[0079] The connecting portion 34 is for example manufactured by stamping the plate and pre-folding the two transverse folds 52, for example using a punch.

[0080] Optionally, the connecting portion 34 has a thickness less than the thickness of each of the first fixing portion 30 and the second fixing portion 32.

[0081] This allows the connecting portion 34 to have an angular stiffness around the transverse direction YY' strictly less than those of the first fixing portion 30 and the second fixing portion 32.

[0082] A connecting portion 34 of lesser thickness is obtained for example by shaping the first connecting piece 16, for example by crushing the connecting portion 34.

[0083] As illustrated on the figure 3 , in one embodiment example, the first connecting piece 16 comprises a stack of a plurality of layers 54, advantageously between 2 and 20 layers.

[0084] The 54 layers are preferably metallic sheets, and more particularly aluminum or copper sheets.

[0085] In each of the first fixing portion 30 and the second fixing portion 32, the layers 54 are fixed to each other, for example by gluing or welding.

[0086] In the connecting portion 34, the layers 54 are free to slide relative to each other, thus facilitating the folding, and conversely the unfolding, of the connecting portion 34.

[0087] In such a case, the connecting portion 34 may have a greater thickness than the first fixing portion 30 and the second fixing portion 32, because the first fixing portion 30 and the second fixing portion 32 are for example crushed and / or heated to be stiffened and / or because of the presence of air between the layers 54 in the connecting portion 34, the connecting portion 34 nevertheless having greater flexibility than the first fixing portion 30 and the second fixing portion 32 for the folding / unfolding of the first connecting piece 16.

[0088] The operation of the interconnection assembly 10 will now be described. This operation illustrates an electrical connection method according to the invention.

[0089] First, an interconnection assembly 10 as described previously is provided. The first connecting piece 16 is in a folded position, as illustrated in the figure 1 .

[0090] The first connecting piece 16 is then moved from the folded position to the unfolded position.

[0091] Preferably, an operator manually unfolds the first connecting piece 16.

[0092] The second fastening portion 32 is then mechanically connected to the second component 14 and electrically connected to the electrical connection terminal 28 of the second component 14.

[0093] For this purpose, in the illustrated example, the screw 50 is received in the fixing hole 48 to mechanically connect the second fixing portion 32 to the second component 12, as illustrated in the figure 2 .

[0094] Alternatively, the second fastening portion 32 is snapped or glued onto the second component 14.

[0095] The second fixing portion 32 is thus in contact with the second component 14, and more particularly with the electrical connection terminal 28 of the second component 14, which allows an electrical connection between the first connecting piece 16 and the second component 14.

[0096] The first connecting piece 16 thus electrically connects the first component 12 and the second component 14, and more particularly the electrical connection terminals 28 of the first component 12 and the second component 14.

[0097] More specifically, the first connecting piece 16 allows an electric current to flow between the first component 12 and the second component 14, and preferably a low-voltage current, i.e. with a voltage of less than 1500 volts.

[0098] As in the example illustrated on the figure 2 , when the second component 14 is also an electrochemical cell or a battery module, the first connecting piece 16 allows an electric current to flow from the electrical connection terminal 28 of the second component 14 to the electrical connection terminal of the first component 12 or vice versa depending on the charging / discharging of the electrochemical cells of the first component 12 and the second component 14.

[0099] The connecting piece 16 thus allows a low-voltage electrical connection between the first component 12 and the second component 14.

[0100] The connection of the first component 12 and the second component 14, each formed of an electrochemical cell or a battery module, via the connecting piece 16 allows the electrochemical cells 18 of each of the first component 12 and the second component 14 to be connected in series, in order to form a battery, for example intended to power a motor vehicle.

[0101] The connecting piece 16 allows a modular connection of the first component 12 and the second component 14.

[0102] Indeed, by means of the removable mechanical connection of the connecting piece 16 on the second component 14, the connecting piece 16 can be easily disconnected from the second component 14, without damaging the related elements, such as the electrical connection terminal 28. The first component 12 can then be easily reconnected to another component distinct from the second component 14 via the same connecting piece 16.

[0103] Furthermore, the connecting piece 16, in its folded position, can be transported on the first component 12 in a space-saving manner. Additionally, transporting it in a folded position reduces the risk of damage to the connecting piece 16.

[0104] In addition, the set 10 is easy to use, especially thanks to the folding, reciprocal unfolding, manual connection piece 16.

[0105] With reference to figures 4 And 5An interconnection assembly 100 is described according to a second embodiment of the invention. The interconnection assembly 100 is analogous to the interconnection assembly 10 shown in the figures 1 And 2 Similar items bear the same numerical references and will not be described again. Only the differences will be described in detail below.

[0106] The first component 12 and the second component 14 are each an electrochemical cell or battery module, and each comprise at least one electrochemical cell 18.

[0107] At least one of the first component 12 and the second component 14 comprises at least two electrochemical cells 18.

[0108] Preferably, each of the first component 12 and the second component 14 is a battery module comprising a plurality of electrochemical cells 18.

[0109] Each of the first component 12 and the second component 14 includes a housing 102, in which each of the electrochemical cells 18 is housed. The electrochemical cells 18 are electrically connected to each other inside the housing 102.

[0110] Each housing 102 defines a notch 104 giving access to the electrical connection terminal 28 of the first component 12, respectively of the second module 14.

[0111] To electrically connect the first component 12 and the second component 14, the connecting piece 16 extends between the notches 104 of the housings 102 of each of the components 12, 14.

[0112] The electrochemical cells 18 of the first component 12 and of the second component 14 can thus be connected in series, via the connecting piece 16.

[0113] Each component 12, 14 advantageously comprises a plurality of electrical connection terminals 28. Each electrical connection terminal 28 of the first component 12 is capable of being electrically connected with a corresponding electrical connection terminal 28 of the second component 14 by a connecting piece 16 as described previously.

[0114] With reference to figures 6 And 7 , we describe an assembly 200 according to a third embodiment of the invention. The assembly 200 is analogous to the assembly 100 shown in the figures 4 And 5 Similar items bear the same numerical references and will not be described again. Only the differences will be described in detail below.

[0115] The first component 12 and the second component 14 are each an electrochemical cell or a battery module comprising one or more electrochemical cells 18.

[0116] The second component 14 further includes an interface piece 202 and a second connection piece 204.

[0117] The interface piece 202 is, for example, a plate extending between the first component 12 and the second component 14.

[0118] The interface piece 202 is advantageously made of a material with good electrical conductivity, i.e., an electrical conductivity σ equal to or greater than 7.10⁶ Sm⁻¹ (siemens per meter). The material with good electrical conductivity is preferably aluminum or copper.

[0119] The interface piece 202 preferably includes two mounting holes 203 (not visible on the figure 7 ).

[0120] The interface piece 202 is suitable for being mechanically and electrically connected to the second fixing portion 32 of the first connecting piece 16 in the unfolded position.

[0121] For example, a screw 50 is received in the fixing hole 48 of the second fixing portion 32 and in one of the fixing holes 203 of the interface part 202 to mechanically connect the second fixing portion 32 to the interface part 202.

[0122] The second connecting piece 204 includes a first fixing portion 206 and a second fixing portion 208.

[0123] The first portion of the fixing 206 is mechanically connected to the second component 14 and electrically to the electrical connection terminal 28 of the second component 14.

[0124] For example, the first portion of the fastener 206 is welded onto the second component 14.

[0125] The second fixing portion 208 is mechanically and electrically connected to the interface part 202.

[0126] For example, the second fastening portion 208 includes a fastening hole 209 (not visible on the figure 7 ) and a screw 210. The screw 210 is advantageously received in the fixing hole 209 of the second fixing portion 208 and in one of the fixing holes 203 of the interface piece 202, so as to fix the second connecting piece 204 on the interface piece 202.

[0127] Preferably, the second connecting piece 204 is substantially similar to the first connecting piece 16. The second connecting piece 204 thus includes a connecting portion 210 allowing a folding, conversely an unfolding, of the second connecting piece 204.

[0128] Optionally, the interface piece 202 includes a movable cover 212 between an open position (illustrated on the figure 6 ) and a closed position.

[0129] The hood 212 in the open position allows the mounting, and conversely the dismounting, of the first connecting piece 16 and the second connecting piece 204 on the interface piece 202.

[0130] The hood 212 in the closed position electrically isolates the first connecting piece 16, the second connecting piece 204 and the interface piece 202.

[0131] The hood 212 in the closed position blocks the attachment of the first connecting piece 16 and the second connecting piece 204 to the interface piece 202. The hood 202 is preferably made of plastic or composite material comprising a plastic matrix reinforced by a filler and / or by fibers.

[0132] The invention is not limited to the embodiments and variants described above and illustrated in the drawings.

[0133] In particular, the first component 12 is an electrochemical cell or a battery module comprising one or more electrochemical cells, the second component 14 can also be an electrochemical cell or a battery module comprising one or more electrochemical cells or another type of component of a battery including the first component 12 or more generally of an electric battery system comprising a battery including the first component 12.

[0134] In particular the second component may be a component such as an interconnect bar (or “busbar” according to English terminology) or an electronic control board, for example an electronic control board configured to control a battery including the first component 12.

Claims

1. An interconnect assembly (10, 100, 200) comprising: - a first component (12) and a second component (14), the first component (12) being an electrochemical cell (18) or a battery module comprising at least one electrochemical cell (18), the first component (12) and the second component (14) each comprising at least one electrical connection terminal (28), the electrical connection terminal (28) of the first component (12) and the electrical connection terminal (28) of the second component (14) being spaced apart in a connecting direction (X-X'), - a first connection piece (16) comprising: - a first fastening portion (30) mechanically connected to the first component (12) and electrically connected to the electrical connection terminal (28) of the first component (12), - a second fastening portion (32), and - a connection portion (34) mechanically and electrically connecting the first fastening portion (30) and the second fastening portion (32), characterised in that the connection portion (34) of the first connection piece (16) is more flexible than the first fastening portion (30) and than the second fastening portion (32) in bending about a transverse direction (Y-Y') perpendicular to the connecting direction (X-X'), the first fastening portion (30) being movable relative to the first component(12) between a folded position and an unfolded position by folding, or conversely unfolding, the connection portion (34) about the transverse direction (Y-Y'), the second fastening portion (32) extending in the extension of the first fastening portion (30) in the connecting direction (X-X') in the unfolded position, the second fastening portion (32) being adapted to be connected mechanically to the second component (14) and electrically to the electrical connection terminal (28) of the second component (14), the second fastening portion (32) extending on the side of the first fastening portion (30) relative to the connection portion (34) in the connecting direction (X-X') in the folded position, the second fastening portion (32) being mechanically disconnected from the second component (14) and electrically disconnected from the electrical connection terminal (28) of the second component (14).

2. The interconnect assembly (10, 100, 200) according to claim 1, wherein the connection portion (34), the first fastening portion (30) and the second fastening portion (32) are integral.

3. The interconnect assembly (10, 100, 200) according to claim 1 or 2, wherein, in the unfolded position, the second fastening portion (32) is releasably mechanically connected to the second component (14).

4. The interconnect assembly (10, 100, 200) according to any one of the preceding claims, wherein the second fastening portion (32) defines an fastening hole (48) and comprises a screw (50) received in the fastening hole (48) for mechanically connecting the second fastening portion (32) to the second component (14).

5. The interconnect assembly (10, 100, 200) according to any one of the preceding claims, wherein the first fastening portion (30) is soldered to the first component (12).

6. The interconnect assembly (10, 100, 200) according to any one of the preceding claims, wherein the connection portion (34) is delimited by two transverse folds (52), each of the two transverse folds (52) connecting the connection portion (34) with the first fastening portion (30) and the second fastening portion (32) respectively.

7. The interconnect assembly (10, 100, 200) according to claim 4, wherein, in the unfolded position, the connection portion (34) has an arcuate shape between the two transverse folds (52).

8. The interconnect assembly (10, 100, 200) according to any of the preceding claims, wherein the connection portion (34) has a thickness less than the thickness of each of the first fastening portion (30) and the second fastening portion (32).

9. The interconnect assembly (10, 100, 200) according to any one of the preceding claims, wherein the first connection piece (16) comprises a stack of a plurality of layers (54), the layers (54) being fastened to one another in each of the first securing portion (30) and the second fastening portion (32) and the layers (54) being free to slide relative to one another in the connection portion (34).

10. The interconnect assembly (10, 100, 200) according to any one of the preceding claims, in which the first connection piece (16) is composed of a material having an electrical conductivity σ equal to or greater than 7.106 S.m-1, preferably aluminium or copper.

11. The interconnect assembly (100, 200) according to any one of the preceding claims, wherein the second component (14) is an electrochemical cell, a battery module comprising one or more electrochemical cells, a connection bar or an electronic battery control card.

12. The interconnect assembly (200) according to any one of the preceding claims, wherein the second component (14) further comprises an interface piece (202) and a second connection piece (204), said second connection piece (204) comprising a first fastening portion (206) mechanically connected to the second component (14) and electrically connected to the electrical connection terminal (28) of the second component (14) and a second fastening portion (208) mechanically and electrically connected to the interface piece (202), the interface piece (202) of the second component (14) being able to be mechanically and electrically connected to the second fastening portion (32) of the first connection piece (16) in the unfolded position.

13. An electrical connection method comprising at least the following steps: - supplying an interconnect assembly (10, 100, 200) according to any one of the preceding claims, the first connection piece (16) being in the folded position, - moving the first connection piece (16) from the folded position to the unfolded position, and - mechanically connecting the second fastening portion (32) of the first connection piece (16) to the second component (14) and electrically connecting the second fastening portion (32) of the first connection piece (16) to the electrical connection terminal (28) of the second component (14).