DE102015216218A1 - Traction storage with tunnel or U-shaped housing - Google Patents

Abstract

The invention relates to a memory module (110) for a vehicle, comprising a plurality of plate-shaped, electrical memory cells (155) arranged side by side in a longitudinal direction of the memory module (110), a housing (112, 120, 130) which surrounds the A plurality of plate-shaped memory cells (155) longitudinally on at least three sides, and which is formed so that it can absorb tensile forces in the longitudinal direction and that stiffening the memory module (110) against bending transversely to the longitudinal direction. The housing (112, 120, 130) comprises for this purpose in particular a U-shaped housing (130) which encloses the plurality of memory cells (155) in the longitudinal direction on three sides; or a tunnel housing (120) enclosing the plurality of memory cells (155) longitudinally on four sides. Two pressure plates (111) disposed on longitudinally opposite ends of the memory module (110) are configured to compress the plurality of plate-shaped electrical memory cells (155) in cooperation with the housing (112).

Description

The invention relates to electrical energy storage for a vehicle. In particular, the invention relates to the cost and space-effective arrangement of electrical energy storage in a multi-lane (especially two-lane) road vehicle.

Electric traction accumulators (eg high voltage (HV) or low voltage (NV) energy storage) for vehicles typically consist of standardized memory modules with a certain number of memory cells (eg 12 memory cells). These memory modules can be interconnected in a variety of ways (eg, memory cells can be internally connected in parallel in a memory module 1, 2, 3, 4, or 6, and an arbitrary number of memory modules can be connected in parallel). Each module typically includes its own cooling unit, which may be glued to the memory module. Alternatively, for a plurality of memory modules, a common cooling unit may be provided, which is pressed against the memory modules by means of a separate compression spring in order to contact the cooling module with the memory modules.

The use of a plurality of separate, standardized memory modules in a vehicle leads to a relatively high demand for installation space. Furthermore, the use of a large number of memory modules leads to a relatively high outlay for the connection to a supporting structure of the vehicle and for the cooling.

The present document deals with the technical task to reduce the effort and space for the installation of electrical energy storage in a vehicle, especially in a multi-lane road vehicle.

The object is solved by the independent claims. Advantageous embodiments are u. a. in the dependent claims.

In one aspect, a memory module for a vehicle is described. The memory module is configured to store electrical energy for the operation of an electric drive machine of the vehicle. The memory module comprises a multiplicity of plate-shaped, electrical memory cells which are arranged side by side in a longitudinal direction of the memory module. In this case, a memory cell z. B. include one or more Li-ion cells. The memory cell may have an open circuit voltage that depends on the cell technology. Typical open circuit voltages are in the range of 3-4 V. The plurality of plate-shaped electrical memory cells can also be referred to as a stack of memory cells. The memory cells can be arranged side by side similar to books in a bookshelf.

The memory module further comprises a housing which, as a one-piece component, encloses the multiplicity of plate-shaped memory cells in the longitudinal direction on at least three sides. The housing is designed such that it can absorb tensile forces in the longitudinal direction. Thus, pressure can be applied to the plurality of memory cells by pressure plates to compress the memory cells, thereby providing a compact memory module. Furthermore, the housing is configured such that the housing stiffens the memory module against bending transversely to the longitudinal direction (i.e., in the vertical or Z direction with respect to the vehicle into which the memory module is to be installed). Thus, the memory module can be self-sustaining even when using a relatively large number of memory cells.

The memory module further comprises two pressure plates disposed on longitudinally opposite ends of the memory module and configured to compress, in cooperation with the housing, the plurality of plate-shaped electrical memory cells. In particular, the stack of memory cells can be compressed by means of the pressure plates in order to compact the memory cells. Furthermore, it can be prevented by the pressure plates that the memory cells bulge, which could have a negative effect on the life of the memory cells. The printing plates may then be secured to the housing (in compressed state) (eg, the printing plates may be welded to the housing) so that the memory cells remain in the compacted state.

Thus, a self-sustaining memory module with a relatively high number of memory cells can be provided. In particular, the memory module 40 or more plate-shaped memory cells, which are arranged side by side upright. Thus, relatively long memory modules can be provided (referred to in this document as long modules), which can be installed in a space and cost-efficient manner in a vehicle.

The housing may include a U-shaped housing that encloses the plurality of memory cells in the longitudinal direction on three sides. The stack of memory cells may then be inserted into the housing from the open side of the U-shaped housing. The U-shaped housing can then be covered by a cover and further stiffened become. In this case, the cover may comprise openings for the electrical contacts of the memory cells.

Alternatively, the housing may include a tunnel housing that encloses the plurality of memory cells longitudinally on four sides. The stack of memory cells can then be inserted from one end or from an end face of the tunnel housing. By using a U-shaped housing or tunnel housing, a self-supporting memory module can be provided.

The vehicle into which the memory module is to be installed may have a maximum available installation length for the installation of memory modules. For example, it may be provided to install memory modules over the entire width of the vehicle (transversely to a direction of travel of the vehicle) so that the maximum available installation length corresponds to the entire width of the vehicle. Alternatively or additionally, it can be provided to install memory modules over a certain length of the vehicle (in the direction of travel), so that this length corresponds to the maximum available installation length. Due to the self-supporting property of the memory module, it is made possible that the length of the memory module in the longitudinal direction corresponds to the maximum available installation length in the vehicle.

In particular, the memory module can extend over the entire available width or length of a vehicle. It is thus possible to fasten the memory module to the vehicle in a space-efficient and cost-efficient manner (eg directly on the longitudinal and / or transverse beams of the vehicle).

The memory module may comprise an intermediate printing plate between two (or more) subgroups of memory cells of the plurality of memory cells. In particular, the memory module may comprise a plurality of subgroups of memory cells, wherein between each of the plurality of subgroups in each case at least one intermediate pressure plate is arranged. The intermediate pressure plate is fixed (in the compacted state) to the housing (eg, welded). The intermediate pressure plate may have a T-profile to support at least one memory cell on one side. By an intermediate pressure plate, the memory cells can be better fixed within the memory module, protected against buckling and / or be supported in the vertical direction. Thus, the self-supporting properties of the memory module can be further improved.

The plurality of memory cells may be divided into at least two subgroups. In this case, the memory cells of the subgroups can each be electrically connected in series, with a (interconnected) subgroup of memory cells having an electrical voltage which is less than or equal to 60 V. The at least two sub-groups can be designed such that the at least two sub-groups can be electrically connected in series via a separable plug connection, in particular via a jumper. It is thus possible to obstruct the memory module (with separate plug connection) in a secure manner. Only when commissioning within the vehicle can then be activated via the connector voltages in the HV range.

The memory module typically includes a cooling unit configured to cool the plurality of memory cells (by means of a cooling medium). In this case, the cooling unit can be installed in the storage module before the memory module is installed in a vehicle. In particular, the cooling unit can be firmly connected to the memory module (eg adhesively bonded). The cooling unit includes a cooling plate that extends longitudinally along a side of the plurality of memory cells (referred to as the cooled side). Furthermore, the cooling unit comprises at least one inlet and / or outlet flange, via which a cooling medium can be conveyed to the cooling plate and / or away from the cooling plate. The inlet and / or outlet flange can thereby save space along an edge of the housing parallel to one of the printing plates.

The cooling plate may include a plurality of channels through which the cooling medium is conveyed from the inlet and / or drain flange along the cooled side of the plurality of memory cells or along the cooled side of the plurality of memory cells to the inlet and / or drain flange can.

The memory module may comprise a first housing having a first plurality of plate-shaped electrical memory cells and a second housing having a second plurality of plate-shaped electrical memory cells. The first housing and the second housing may be arranged side by side in the longitudinal direction. The first housing has a first cooled housing wall and the second housing has a second cooled housing wall (longitudinally along the respective stack of memory cells). The first cooled housing wall contacts the cooling plate on a first side, and the second cooled housing wall contacts the cooling plate on a second side opposite the first side, so that the first plurality of plate-shaped electric storage cells and the second plurality of plate-shaped electric storage cells (common) cooling plate to be cooled. By using a Single cooling unit for two stacks of memory cells, the space and the cost of providing an electrical energy storage in a vehicle can be further reduced.

The memory module may include at least one cell stamp configured to press one or more of the memory cells to a housing wall of the housing. In particular, the at least one cell stamp can be set up to push one or more of the memory cells away from a specific housing wall of the housing and press against the housing wall opposite the particular housing wall. For this purpose, the cell stamp may comprise a compression spring. The cell stamp may in particular be designed to press one or more of the memory cells to a cooled housing wall of the housing. Thus, the fixation and the cooling of the memory cells can be further improved.

In another aspect, a multi-lane (especially two-lane) road vehicle (e.g., a passenger car or a lorry) is described that includes an electric machine for driving the road vehicle. Further, the road vehicle includes a memory module described in this document and configured to provide electrical power for operation of the electric machine.

The road vehicle may comprise a longitudinal member and / or a cross member. The memory module (in particular the housing of the memory module) can be fastened directly to the side member and / or the cross member.

It should be understood that the devices and systems described herein may be used alone as well as in combination with other devices and systems described in this document. Furthermore, any aspects of the apparatus and systems described in this document may be combined in a variety of ways. In particular, the features of the claims can be combined in a variety of ways.

Furthermore, the invention will be described in more detail with reference to exemplary embodiments.

Show

1a an exemplary arrangement of memory modules in a vehicle;

1b an exemplary long module for a vehicle;

1c exemplary housing for a memory module;

1d an exemplary cooling unit for a memory module;

1e an exemplary connection of a long module to a carrier of a vehicle;

2a to 2e show views of exemplary long modules with different housings; and

3a and 3b show an exemplary cell stamp for fixing the memory cells in a memory module.

As stated above, the present document deals with the installation space and cost-efficient arrangement of electrical energy storage devices in a vehicle. The electrical energy storage are used to store electrical energy for the operation of a drive motor of the vehicle.

Typically, in a vehicle several, identically constructed, memory modules 100 installed (as in 1a shown). The memory modules 100 typically have outside dimensions of less than 50 cm or 70 cm in all directions. The memory modules 100 comprise a plurality of memory cells (e.g., 12 memory cells). The memory cells are formed by tie rods 102 and printing plates 101 squeezed to a compacted memory module 100 to build. The individual memory cells can be connected via electrical contacts 103 be connected to an electric drive machine or power electronics of the vehicle.

The use of a variety of memory modules 100 requires a relatively high amount of space. In particular, for each memory module 100 2 printing plates each 101 needed. Furthermore, for the individual memory modules 100 separate cooling units needed. Alternatively, using springs, a common cooling rail to the separate memory modules 100 be pressed on, but this requires additional space and additional components. This results in a relatively high cost for the cooling of the memory modules 100 , Furthermore requires the connection of the memory modules 100 to the vehicle typically a dedicated support structure, which is also associated with a relatively high cost.

1b shows a modified memory module 110 (referred to in this document as a long module), which has an increased number of memory cells and that can be tailored to the dimensions of a particular vehicle. The long module 110 can z. B. have a length (perpendicular to the stacked memory cells) of 1 m to 1.2 m or 1.5 m. The long module 110 includes z. B. 48 memory cells or more. In this case, the long module 110 be designed such that it occupies substantially the entire vehicle width in a transverse arrangement (ie transverse to a direction of travel of the vehicle). Alternatively, the long module 110 in a longitudinal arrangement (in the direction of travel) occupy the maximum possible space in the longitudinal direction.

The memory cells of the long module 110 can in a housing 112 be arranged, wherein the housing comprises tie rods. The memory cells can be made by printing plates 111 inside the case 112 be squeezed together to form a unit. Possibly. can the long module 110 between subgroups of memory cells intermediate printing plates 114 include as uniform as possible pressure distribution within the long module 110 to reach and to the long module 110 to stabilize. By intermediate printing plates 114 For example, vertical forces of a cell stack (ie, a group of memory cells) on supporting tie rods of the housing 112 be supported.

The long module 110 can be self-supporting. It is thus made possible that the long module 110 z. B. exclusively on the printing plates 111 is fastened to the vehicle (eg on a side member) of the vehicle. Thus, the cost of installing an electrical energy storage in the vehicle can be reduced.

A long module 110 can be pre-assembled in one piece with a single cooling unit. In particular, the cooling unit can be glued to the long module, whereby a space-efficient arrangement in the vehicle is made possible.

The individual memory cells of the long module 110 can via contacts 113 be connected to an electrical machine or power electronics of the vehicle. The contacts 113 a long module 110 may be only partially interconnected for installation in the vehicle. In particular, only subgroups of the memory cells of a long module can be used 110 be connected in series with each other, so that the voltage at a subset of memory cells in the NV range (eg at 60 V or less) is located (possibly also at least some memory cells within a long module 110 be connected in parallel). Furthermore, jumpers can be provided by which two subgroups of memory cells can be connected in series with each other. This is how the handling of a long module can be 110 be simplified in assembly, warehousing and service, since only by the jumper plugging a HV energy storage is created.

The housing 112 of the long module 110 may be at least partially closed. In particular, the housing 112 of the long module 110 the memory cells of a long module 110 enclose on at least three sides. 1c shows an exemplary tunnel housing 120 in a side view (perpendicular to the printing plates 111 ). The tunnel housing 120 has four walls 121 which enclose the stack of memory cells in a longitudinal direction along the sides of the stack of memory cells (and which may be used at least partially as tie rods). On at least one of the walls 121 there is a cooling unit 122 for cooling the memory cells. On another wall 121 (which is typically the wall 121 the cooling unit 122 opposite) there are openings for the contacts 113 the memory cells. The further wall 121 with the openings for the contacts 113 can be arranged such that the contacts 113 the memory cells in the installed state of the memory module 110 on a side of the storage module running perpendicular to the roadway 110 are located.

When mounting a long module 110 (eg in a tunnel housing 120 ), a stack of memory cells can be prepared first. The memory cells can be insulated from each other by insulating films. Furthermore, the stack of memory cells at the respective ends or end faces in each case a pressure plate 111 exhibit. Furthermore, a cooled side of the stack of memory cells (that of the cooling unit 122 facing) are coated with a thermal contact mass through which a thermally conductive contact between the memory cells and a cooled wall 121 of the housing 112 . 120 can be produced. The stack of memory cells can then pass over the face into a tunnel housing 120 be inserted. Furthermore, the stack can be against the cooled wall 121 pressed, at which the cooling unit 122 located. For this purpose, the tunnel housing 120 have a greater width than the plate-shaped memory cells 155 to press against the cooled wall 121 to enable. The stack of memory cells can continue over the printing plates 111 be compressed to a compact long module 110 provide. The printing plates 111 can after the compacting firm with the housing 112 . 120 connected (eg welded). Possibly. can the printing plates 111 detachable with the housing 112 be connected (eg by screw wedges, collets, expansion elements, etc.) to disassemble the memory module if necessary 110 to enable.

Alternatively, a U-shaped housing 130 with a cover plate 131 be used. In this case, the cover plate 131 Openings for the electrical contacts 113 exhibit. It can then, as described above, a stack of memory cells are created, over the open longitudinal side of the U-shaped housing 130 in the case 130 inserted and to the wall 132 with the cooling unit 122 can be pressed. About the printing plates 111 The stack can be compressed, and the printing plates 111 can then be in the compacted state on the housing 130 fixed (eg welded). Furthermore, the cover plate 131 on the housing 130 fixed (eg wears out). This creates a self-supporting housing 112 , The cover plate 131 can make openings for the contacts 113 have the memory modules. The cover plate 131 can be arranged such that the contacts 113 the memory cells in the installed state of the memory module 110 on a side of the storage module running perpendicular to the roadway 110 are located. Furthermore, the cover plate 131 for stiffening the memory module 110 after insertion of the memory cells on the U-shaped housing 130 fixed (eg, welded) to a self-supporting structure for the memory module 110 provide.

To the stack of storage cells to the wall 132 with the cooling unit 122 To press, a variety of punches (for example, one punch per memory cell) can be used, so that the memory cells evenly against the wall 132 with the cooling unit 122 be pressed. Furthermore, by means of the stamp clamping elements (or so-called cell stamp) can be permanently used to a contact pressure to the cooling surface, ie to the wall 132 with the cooling unit 122 to ensure. Such a cell stamp is exemplary in the 3a and 3b shown.

A tunnel housing 120 and / or a U-shaped housing 130 can be arranged back to back, giving a common cooling unit 122 (In particular, a common cooling plate) for two housings 120 . 130 can be used.

This arrangement can be used as a symmetrical butterfly arrangement 140 be designated. By the multiple use of a cooling unit 122 the space for a memory module can be further reduced.

1d shows an exemplary cooling of a long module 110 , The inflow / outflow pipes or flanges 151 for the cooling medium (eg, water-glycol or carbon dioxide) may be attached to one or more edges of the housing 112 of the long module 110 be arranged. For example, the one or more flanges 151 through cavities in the housing walls and / or in the printing plates 111 be formed. In this case, in the case of a gaseous cooling medium such as carbon dioxide, an integrated or combined inlet / outlet for the cooling medium can be used at one edge. In a liquid cooling medium such as water-glycol, separate inflows and outlets may be disposed on two edges of the housing. The one or more flanges 151 can at least partially within the housing 112 be arranged to the required space for the long module 110 to reduce.

Furthermore, the cooling unit comprises 122 a cooling plate 156 that with a wall of the housing 112 in contact. The cooling plate 156 Can with the cooled wall of the housing 112 be glued. 1d further shows a layer of thermal contact material 152 on a cooled side surface of the memory cells 155 that the cold plate 156 is facing. This layer of thermal contact material 152 can before the introduction of the stack of memory cells 155 on the cooled side surface of the stack of memory cells 155 be applied.

To stabilize the memory cells 155 within a housing 112 a long module 110 can via injection ports 153 Fixing adhesive in the housing walls 157 in the interior of the case 112 be injected. The injection openings 153 are in 1d shown as arrows.

A long module 110 can be designed such that the long module 110 directly to a carrier 160 (In particular on side members and / or cross member) of the vehicle can be attached (see 1e ). By using a tunnel housing 120 or a U-shaped housing 130 can the long module 110 be self-supporting, so in addition to a connection (eg screwing) to a carrier 160 the vehicle no further load-bearing elements are required.

2a and 2 B show views of an exemplary long module 110 with a U-shaped housing. In particular, show 2a and 2 B the provision of contacts 103 for the memory modules 155 on the side of the long module 110 , Further show 2a and 2 B exemplary injection openings 153 for injection of fixative 157 for fixing the memory cells 155 in a U-shaped housing. 2c and 2d show in an analogous manner an exemplary long module 110 with a tunnel housing 120 , Furthermore, the show 2c and 2d lateral openings 201 for contacting the memory cells 155 , The openings 201 In addition, they can be used with stamps 202 the memory cells 155 during the manufacturing process in the long module 110 to a housing wall, in particular to the housing wall with the cooling plate 156 to press. So can a reliable cooling of the memory cells 155 during operation of the long module 110 be guaranteed. 2e shows an exemplary long module 110 in a butterfly arrangement 140 ,

3a and 3b show an exemplary cell stamp 300 that can be used to the memory cells 155 in a housing 120 . 130 to fix. The cell stamp 300 can z. B. through the openings 201 in the case 120 . 130 of the memory module 110 are introduced, and then remain permanently in the memory module 110 , The cell stamp 300 can be an inner cylinder 301 and an outer cylinder 302 include, wherein the inner cylinder 301 by springs 303 from the outer cylinder 302 is pressed out, and thus causes a force, which is a memory cell 155 to a housing wall, in particular to the housing wall with the cooling plate 156 , presses. The use of cell stamping 300 in a memory module 110 allows improved fixation and cooling of the memory cells 155 ,

The provision of a long module adapted to the structure of a vehicle 110 allows for increased energy density, as the number of printing plates 111 the memory modules 110 can be reduced in a vehicle. Furthermore, further passive parts for the connection of the memory modules 110 saved on the vehicle. In addition, the cost and space for cooling memory modules 110 be reduced. In particular, a cooling unit on the long module 110 preassembled (eg glued), so that space (in particular the height) and expenses for springs omitted. The use of a long module 110 In addition, leads to a gain in weight in the vehicle, as a direct attachment to carriers 160 of the vehicle, and there a dedicated support structure for individual memory modules 100 eliminated.

The present invention is not limited to the embodiments shown. In particular, it should be noted that the description and figures are intended to illustrate only the principle of the proposed methods, apparatus and systems.

Claims (12)

Memory module ( 110 ) for a vehicle, wherein the memory module ( 110 ), - a plurality of plate-shaped electrical storage cells ( 155 ) arranged in a longitudinal direction of the memory module ( 110 ) are arranged side by side upright; - a housing ( 112 . 120 . 130 ) integrally forming the plurality of plate-shaped memory cells ( 155 ) in longitudinal direction on at least three sides, and which is designed such that it can absorb tensile forces in the longitudinal direction and that it is the memory module ( 110 ) stiffened against bending transversely to the longitudinal direction; and - two printing plates ( 111 ), which are connected to longitudinally opposite ends of the memory module ( 110 ) are arranged, and which are arranged, in cooperation with the housing ( 112 ) the plurality of plate-shaped electrical memory cells ( 155 ) to compress. Memory module ( 110 ) according to claim 1, wherein the housing - a U-shaped housing ( 130 ) is that the plurality of memory cells ( 155 ) encloses in the longitudinal direction on three sides; or - a tunnel housing ( 120 ) is that the plurality of memory cells ( 155 ) encloses in longitudinal direction on four sides. Memory module ( 110 ) according to claim 1 or 2, wherein the U-shaped housing ( 130 ) a cover ( 131 ) having the plurality of memory cells ( 155 ) is covered longitudinally on a fourth side. Memory module ( 110 ) according to one of the preceding claims, wherein - the vehicle into which the memory module ( 110 ), has a maximum available installation length for the installation of memory modules; and a length of the memory module ( 110 ) in the longitudinal direction of the maximum available installation length corresponds. Memory module ( 110 ) according to one of the preceding claims, wherein - the plurality of memory cells ( 155 ) is divided into at least two subgroups; - the memory cells ( 155 ) of a subgroup are electrically connected in series; A subset of memory cells ( 155 ) has an electrical potential that is less than or equal to 60 V; and - the at least two sub-groups can be electrically connected in series via a separable connector, in particular via a jumper. Memory module ( 110 ) according to one of the preceding claims, wherein - the memory module ( 110 ) a cooling unit ( 122 ) configured to store the plurality of memory cells ( 155 ) to cool; - the cooling unit ( 122 ) a cooling plate ( 156 ), which extends longitudinally along a cooled Side of the multiplicity of memory cells ( 155 ) extends; and - the cooling unit ( 122 ) at least one inlet and / or outlet flange ( 151 ), via which a cooling medium to the cooling plate ( 156 ) and / or from the cooling plate ( 156 ) can be carried away, and along an edge of the housing ( 112 ) parallel to one of the printing plates ( 111 ) runs. Memory module ( 110 ) according to claim 6, wherein the cooling plate ( 156 ) comprises a plurality of channels through which the cooling medium from the inlet and / or outlet flange ( 151 ) away along the cooled side of the plurality of memory cells ( 155 ) or along the cooled side of the plurality of memory cells ( 155 ) to the inlet and / or outlet flange ( 151 ). Memory module ( 110 ) according to one of claims 6 to 7, wherein - the memory module ( 110 ) a first housing ( 112 . 120 . 130 ) with a first plurality of plate-shaped electrical memory cells ( 155 ) and a second housing ( 112 . 120 . 130 ) with a second plurality of plate-shaped electrical memory cells ( 155 ); The first housing ( 112 . 120 . 130 ) a first cooled housing wall and the second housing ( 112 . 120 . 130 ) has a second cooled housing wall; and - the first cooled housing wall the cooling plate ( 156 ) on a first side and the second cooled housing wall the cooling plate ( 156 ) on a second side opposite the first side, so that the first plurality of plate-shaped electrical memory cells ( 155 ) and the second plurality of plate-shaped electrical memory cells ( 155 ) through the cooling plate ( 156 ) are cooled. Memory module ( 110 ) according to one of the preceding claims, wherein - the housing ( 112 . 120 . 130 ) includes a first housing wall longitudinally attached to a first side of the plurality of memory cells (12). 155 ) is arranged; and - the first housing wall has a multiplicity of injection openings ( 153 ) by which a fixing compound ( 157 ) injecting the first side of the plurality of memory cells ( 155 ) fixed to the first housing wall. Memory module ( 110 ) according to one of the preceding claims, wherein - the memory module ( 110 40 or more plate-shaped memory cells ( 155 ), which are arranged side by side upright; and / or the memory module ( 110 ), in particular the housing ( 112 . 120 . 130 ), are formed such that the memory module ( 110 ) is self-sustaining. Memory module ( 110 ) according to one of the preceding claims, wherein the memory module ( 110 ) at least one cell stamp ( 300 ), which is set up, one or more of the memory cells ( 155 ) to a housing wall of the housing ( 112 . 120 . 130 ). A multi-lane road vehicle comprising - an electric machine for driving the road vehicle; and a memory module ( 110 ) according to one of the preceding claims, which is arranged to provide electrical energy for the operation of the electric machine.

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