Energy storage cell unit and energy storage module

Abstract

Energy storage cell unit (10) comprising at least two arresters (1, 2) for supplying or discharging electrical energy, wherein at least one device (3) for fixing the energy storage cell unit (10) is provided on at least one side of the energy storage cell unit (10), which device has at least two elements (4, 5) by means of which the energy storage cell unit (10) is fixed at the place of use, the device (3) for fixing is designed in the form of a supporting beam which is attached to at least one side of the energy storage cell unit (10), at the respective end of which the element (4, 5) is designed as a tapered extension of the beam, and the device (3) is made of an insulating plastic, wherein the two arresters (1, 2) of the energy storage cell unit (10) are arranged on the same side of the energy storage cell unit (10) and the device (3) for fixing the energy storage cell unit (10) is connected to the energy storage cell unit (10) via the arresters (1, 2).

Description

[0001] The present invention relates to an energy storage cell unit, in particular a flat cell, which has two conductors for supplying or discharging electrical energy. A characteristic of the present energy storage cell unit is that this unit has a fixing device on at least one side, for example a bar, which has at least two elements for fixing the energy storage cell unit. The present invention also relates to an energy storage module comprising at least two energy storage cell units and a housing, wherein the housing is designed to accommodate the cell units.

[0002] Hybrid or electric vehicles are vehicles that are powered entirely or partially by electrical energy.

[0003] Motor vehicles with hybrid drive, also called hybrid vehicles, for example, have an internal combustion engine, an electric motor, and one or more electrochemical energy storage devices. Electric vehicles with fuel cells generally consist of a fuel cell for energy conversion, a tank for liquid or gaseous energy carriers, an electrochemical energy storage device, and an electric motor for propulsion.

[0004] The electric motor of a hybrid vehicle is usually designed as a starter / generator and / or electric drive. As a starter / generator, it replaces the normally existing starter motor and alternator. In an electric drive configuration, the electric motor can contribute additional torque, i.e., an acceleration torque, to the vehicle's propulsion. As a generator, it enables recuperation of braking energy and power supply to the vehicle's electrical system.

[0005] In a pure electric vehicle, the drive power is provided solely by an electric motor. Both vehicle types, hybrid and electric vehicles, require the provision and transfer of large amounts of electrical energy.

[0006] The energy flow is controlled by an electronic system commonly referred to as a hybrid controller. Among other things, it regulates whether and in what quantity energy should be withdrawn from or added to the energy storage system.

[0007] The energy extracted from the fuel cell or energy storage device generally serves to generate propulsion power and supply the vehicle's electrical system. The energy supplied is used to charge the storage device or to convert braking energy into electrical energy, i.e., regenerative braking.

[0008] The energy storage system for hybrid applications can be recharged while driving. The required energy is provided by the combustion engine.

[0009] Lead-acid batteries, double-layer capacitors, nickel-metal hydride, nickel-zinc, or lithium-ion cells can be used as energy suppliers and storage devices for electric vehicle applications. Lithium-ion cells are essentially divided into hard-case cells and modern flat cells (pouch cells with a thin aluminum shell).

[0010] Depending on the application of the cells in the energy storage system for hybrid vehicles, plug-in hybrids, or electric vehicles, the cells also differ in shape, size, and weight. This requires different fastening concepts for each cell type. Furthermore, the ultimate application of the energy storage system in the vehicle, especially in commercial vehicles, plays a crucial role, significantly defining the requirements for mechanical stability and vibration resistance over the service life of an energy storage system with the cells mounted therein. The high dynamic forces and impacts during operation must be taken into account here. Due to the diverse requirements in different vehicles with regard to the type, direction, and values ​​of load, the fastening concept for the cells in the energy storage system therefore plays an important role.

[0011] The additional load caused by the weight of the storage unit is not significant in relation to the isotropic, dynamic loads.

[0012] EP 2 339 683 A2 describes a flat battery cell with a foil housing, on the lateral edges of which holding means are arranged for receiving in a housing.

[0013] EP 1 936 717 A1 discloses a battery module in which an energy storage cell is arranged between a first spacer and a second spacer. An opening is arranged in each of the spacers through which a sleeve is guided.

[0014] DE 10 2007 001 590 A1 shows an electrical storage device with a plurality of flat cells, between which a cooling plate is arranged, which has a plurality of cooling channels through which air can flow.

[0015] DE 10 2009 051 213 A1 describes an electrochemical cell which has an electrode stack arranged in a casing, wherein a chain part is arranged on an outer side of the casing in order to be connected to another casing of a further electrode stack.

[0016] From US 7 615 309 B2 a battery module is known in which battery cells have two electrodes and the electrodes are connected to each other via insulating spacers and a screw element.

[0017] An object of the present invention is to design a fastening of the cells in the energy storage device in such a way that these loads can be absorbed equally from all directions and can be endured without damage, and to enable a simple fastening of the cells in the battery housing.

[0018] In particular, it is an object of the present invention to provide a correspondingly designed energy storage cell unit and an energy storage module which meets the above-mentioned requirements.

[0019] This object is achieved with respect to the energy storage cell unit by the features of patent claim 1 and with respect to the energy storage module by the features of patent claim 8. The further dependent claims show advantageous developments.

[0020] According to the invention, an energy storage cell unit is thus provided which has at least two conductors for supplying or discharging electrical energy, wherein at least one device for fixing the energy storage cell unit is provided on at least one side of the energy storage cell unit, which device has at least two elements for fixing the energy storage cell unit.

[0021] The inventive solution for the energy storage cell unit thus provides for a device to be attached to the energy storage cell unit, with which the energy storage cell unit can be fastened or fixed at its location of use. This device is frictionally connected to the energy storage cell unit and has at least two fixing elements, via which the corresponding fastening or fixing of the energy storage cell unit at the location of use takes place.

[0022] According to the invention, the fixing device is designed in the form of a supporting beam which is attached to at least one side of the energy storage cell unit.

[0023] This device can be formed integrally with the energy storage cell unit or as a separate component.

[0024] It is also possible for the fixing device to include a spacer. Such a design of the fixing device makes it possible, for example, when the energy storage cell units used are flat cell modules, such as flat lithium-ion batteries, to arrange several energy storage cell units in parallel while maintaining a predetermined distance. This allows for an extremely space-saving arrangement of the energy storage cell units, while always maintaining a minimum distance between the respective units via the spacer, thus preventing the energy storage cell units from touching and thus damaging each other during operation, for example due to forces occurring.

[0025] According to the invention, the device is made of plastic. The plastic can preferably be a fiber-reinforced plastic and / or a plastic with metal inserts.

[0026] It is further preferred if the fixing device has at least two recesses via which a positive and / or non-positive connection to the energy storage cell unit can be established. According to this embodiment, the connection to the energy storage cell unit can be established, for example, by means of corresponding screws or threaded rods, etc. In this case, the energy storage cell units also have corresponding recesses to enable a continuous connection. It is also possible to connect a plurality of such energy storage cell units to one another in the case of identically constructed energy storage cell units by bringing the respective recesses congruently one above the other and connecting them to one another in a positive and / or non-positive manner, for example by passing and fastening a threaded rod.

[0027] In particular, the device for fixing the energy storage cell unit to the energy storage cell unit can be connected to the energy storage cell unit by screwing, riveting, welding, gluing or integrally molding.

[0028] According to the invention, the two arresters are arranged on the same side of the energy storage cell unit, which can be rectangular, for example. The device is attached to the side and connected to the energy storage cell unit that has the arresters. The arresters can be designed, for example, as flat metal contacts. The fixing device can thus be arranged on one side, for example on the front or back of the energy storage cell unit, lying on the arresters. If the fixing device is designed in the shape of a bar, the bar can lie continuously over both arresters. It is also possible, however, to provide recesses for the arresters in the device, for example on the bars, so that the bar can be plugged onto both flat arresters, for example, and thus connected to them.The beam is fixed to the respective arresters in the ways mentioned above, for example by screwing or gluing, etc. Furthermore, it is possible to design the fixing device as a continuous beam that is arranged on one side of the two arresters, but to arrange washers or similar on the other side of the arresters in order to ensure a certain minimum distance between each two energy storage cell units in the event that several energy storage cell units are arranged parallel to one another.

[0029] The type of fixation via the device which is attached to the energy storage cell unit according to the invention is particularly suitable for rectangular energy storage cell units which are preferably designed as flat cells.

[0030] The attachment of the cells, for example to the arresters, has a number of advantages over previous solutions. Optimized mount

[0031] The main loads from the cell's inertial forces are absorbed by the targeted attachment of the cell to the two cell arresters using a sturdy plastic beam. This plastic beam connects the cell to the cell housing (cell block) while taking HV safety into account. To achieve this attachment, there is a load-bearing connection between the beam and the cell arrester. For this purpose, it is optimal to attach the cell beam where the main weight of the cell is connected, namely to the arresters. To avoid damaging the sealed seams, the attachment is made through holes in the arresters above the sealed seam. To stiffen this connection to two arresters, a beam made of non-conductive plastic is used, which then also establishes the connection to the cell housing. This absorbs forces from two loading directions in the space. Vibration stability

[0032] The force in the third spatial direction is absorbed by the beam (e.g., made of plastic) extending beyond the sealed seam to absorb the transverse force across the entire surface, in conjunction with a stacked cell structure in which the defined spacing between the cells is ensured by compressible spacers. This interaction between the plastic beam and the cell stack in the cell housing optimizes vibration stability. Stackability and tolerance compensation

[0033] The identical plastic beams ensure good stackability of the cells with mounting beams. This results in defined total tolerances that optimally support stackability within a cell housing.

[0034] For applications with gaps between the beams, counter contours can be used in the cell housing to compensate for tolerances. In this case, individual tolerance compensation is ensured by the individual cell housing. Manufacturability

[0035] The plastic beams are all constructed identically and can therefore be used multiple times in different positions. This common-parts concept minimizes manufacturing costs. The manufacturability of a plastic beam with metal bushings is state-of-the-art and can therefore be manufactured reliably in every respect.

[0036] In the event that the device for fixing is fixed to the arresters of the cell, the following embodiments are particularly advantageous, which are listed below in bullet points. • One or more stable plastic bars can be provided for each cell to attach a cell to the cell housing (cell block): - The mounting holes in the arresters are inserted to match the holes in the beam. - The beam(s) can be attached to the cell through a hole in each of the cell's down conductors using a firmly joined, pre-stressed rivet or screw connection. - To improve the load-bearing capacity of the connection to the arresters, metal bushings can be inserted into the plastic beams at the fastening points to the arresters. - easy to manufacture due to good joining properties and simple processes; - The result is a very strong connection with a plastic beam at the most stable point of a cell - at the two conductors of the cell. • The mounting holes in the arresters are offset from the center, which optimizes HV safety when stacking the cells. • The beam is designed in such a way that it extends downwards over the sealed seam of the cell and lies flat there with a transition fit, which leads to a very load-bearing connection in the area of ​​the sealed seam for acting transverse forces. • The mounting bar is made of plastic with the possibility of various reinforcements: - To optimize the stability and strength of the beam, there are various optimization options when choosing this material and this concept; e.g. - to improve the load-bearing capacity of the beam by inserting GRP fibres into the plastic beam, - to improve the load-bearing capacity of the beam by inserting upright flat metal strips into the plastic beam and as a sandwich construction, - to improve the load-bearing capacity of the beam by reinforcing the support surfaces of the beam at the respective fastening points towards the cell housing, - serves to optimize HV safety relative to the cell housing and between the arresters. • The respective beam ends of the individual cells are connected to the cell housing in a force-locking and / or form-locking manner - To transfer the forces to the cell housing, appropriate support shapes and matching fastening elements are advantageous. • Design of the respective beam ends of different cells to compensate for tolerances - The beam ends can lie flat against each other and thus form a total tolerance in a cell housing. - They can also be designed in such a way that there is free space between the individual beam ends for a counter contour in the cell housing and are therefore designed as individual tolerances. • Manufacturability of the plastic beams - The beams can all be manufactured cost-effectively using known manufacturing processes.

[0037] According to the invention, an energy storage module is also provided which comprises a module insulator and at least two previously described energy storage cell units which can be installed parallel to one another in the module insulator, wherein the module insulator has a receiving possibility for the elements for fixing the energy storage cell unit.

[0038] The energy storage module thus represents the application of the previously described energy storage cell units, whereby these can be accommodated in parallel in a module insulator, which is designed as an insulating housing or device for the parallel arrangement of the energy storage cell units.

[0039] The module insulator is preferably cuboid-shaped and open on at least one side, so that the respective energy storage cell units, for example flat cells, can be inserted into the module insulator from the open side. If the two fixing elements are attached, for example, to a bar-shaped fixing device at the respective ends of this device, the module insulator can have receiving devices at the level of the open side into which these fixing elements can be inserted. These receiving devices or receiving options can be designed, for example, as recesses, but a mechanical latching device or fixing device is also conceivable.

[0040] When using flat or pouch cells, it is particularly important to ensure that the thin aluminum outer shell and the surrounding sealing seams are not damaged by the fastening and the loads, so that they can reliably perform their sealing function. Therefore, the transfer of forces via the film should be avoided as much as possible and taken into account in the fastening concept.

[0041] For this reason, the layered, stacked cell structure with multiple cell housings in an energy storage system offers significant advantages, as it can essentially absorb the forces in this single loading direction with appropriate interlayers between the individual cells and transfer them to the supporting structure. It is advantageous to insert some intermediate struts throughout the entire stack to relieve the forces on the cells. This is ensured by the individual cell housings.

[0042] Advantageously, the module insulator thus has guide recesses arranged at the positions of the respective energy storage cell units. This means that the module insulator is designed, for example, such that on the sides where the energy storage cell units, in the case of flat cells, are inserted into the module insulator with their edges, guide rails or guide devices are provided, which are arranged in the module insulator along the insertion direction of the respective energy storage cell unit. These guide rails can be designed, for example, as notches or recesses, so that the energy storage cell units are fixed in their final position in the module insulator.

[0043] Advantageously, the module insulator further has a capacity for 2 to 24, preferably 4 to 12 energy storage cell units.

[0044] The energy storage module according to the present invention may preferably further comprise at least one of the following components: a) a clamping bar which can be attached above the devices for fixing the energy storage cell units on the modulator, b) a module housing which can be arranged around the module insulator and / or into which the module insulator can be inserted in a form-fitting and / or force-fitting manner, c) cooling or supporting fin / plate with at least one flat cell attached to it, d) guide grooves arranged parallel to each other for receiving the cooling or supporting fin / plate, e) an intercooler plate, f) a flexboard, g) a CSE board and / or h) a housing cover.

[0045] The present invention will be explained in more detail in the following descriptions with reference to the accompanying figures, without limiting the invention to the specific embodiments shown therein.

[0046] Show Fig. 1A to 1J show variants of the embodiments of a device used according to the invention for fixing the energy storage cell units; Fig. 2A, Fig. 2B shows an exploded view of two energy storage cell units 10 and 10' according to the invention; Fig. 3A and Fig. 3B shows an assembled ensemble of two energy storage cell units 10 and 10' according to the invention from the front and rear sides; and Fig. 4 an energy storage module according to the invention in a preferred embodiment.

[0047] As already explained above, the basic concept of the present invention is the possibility of fastening an energy storage cell unit by means of a fixing device. In particular, the cell fixing concept provides for the fixing of the device, preferably in the form of a beam, to the cell's down conductors. One or more plastic beams per cell can be used to fasten the cell to the cell housing (cell block). The beam(s) are preferably fastened to the cell through a hole in each of the cell's down conductors using a firmly joined, prestressed rivet or screw connection. The fixing holes in the down conductors are offset from the center to ensure HV safety when stacking the cells. The respective beam ends of the individual cells are connected to the cell housing using a force-fitting and / or form-fitting connection.To improve the load-bearing capacity of the connection to the arresters, the following designs can be provided: • Insertion of metal bushings into the plastic beams at the fastening points to the arresters, • Insertion of GRP fibre components into the plastic beams, • Insertion of upright flat metal strips into the plastic beams and as a sandwich construction, • Reinforcement of the support surfaces of the beam at the respective fastening points towards the cell housing.

[0048] The respective beam ends of different cells can be adjacent to one another or designed to provide free space between them for mating contours in the cell housing. Likewise, a corresponding shape can be provided at both ends of the beam at the respective attachment points to create a positive connection to the cell housing. The interface between the respective beam ends and the cell housing is completed with suitable fastening elements (metal clips, screws, etc.). Below the joined connection, in the area of ​​the sealing seam, the beam is designed to fit directly and flatly against the sealing seam and is thus designed to withstand applied transverse forces.

[0049] The following examples primarily focus on riveting. The term "riveting" is used synonymously with other fastening methods. Examples include screwing, clamping, positive-locking pins or similar methods, gluing, welding, soldering, clinching, nailing, plugging, clipping, etc.

[0050] In the following, some particularly preferred embodiments will be presented and explained in more detail. Example 1 (Fig. 1A)

[0051] In this example, the beams (i.e. the fixing devices) 3, 3' are made of insulating plastic and each have a fixing element 4, 5 at each end, which is designed as a tapered extension of the beam. A cell can be inserted between two beams 3 and 3' for fixing. However, it is also conceivable to use only one beam 3 for fixing and to attach it to one side of the cell. To increase mechanical stability, metal inserts 40 are inserted into the plastic. A design without metal inserts is also conceivable if, for example, a fiber-reinforced plastic is used. The cells are attached to the beam using a rivet or screw connection. Alternatively, another form-fitting receptacle can also be used. The beams 3, 3' are designed in such a way that the support surfaces 41 create a force-fitting connection between the cells and the beams 3 and 3'. Example 2 (Fig. 1B)

[0052] In this example, the beams 3, 3' are made of insulating plastic and each have an element 4, 5 for fixing at each end, which is designed as a tapered extension of the beam. A cell can be inserted between two beams 3 and 3' for fixing. However, it is also conceivable to use only one beam 3 for fixing and to attach it to one side of the cell. To increase mechanical stability, metal inserts 40 are inserted into the plastic. The cells are attached to the beam 3, 3' using a rivet or screw connection. Alternatively, the attachment can be achieved by clamping or by another form-fitting receptacle. The beams 3, 3' are designed in such a way that they do not have any contact surfaces. The cells are attached here only by a form-fitting connection between two beams 3, 3'. Embodiment 3 (Fig. 1C)

[0053] In this example, the beams 3, 3' are made of insulating plastic and each have an element 4, 5 for fixing at each end, which is designed as a tapered extension of the beam. A cell can be inserted between two beams 3 and 3' for fixing. However, it is also conceivable to use only one beam 3 for fixing and to attach it to one side of the cell. To increase mechanical stability, metal inserts are inserted into the plastic. The cells are attached to the beams 3, 3' using a clamp connection 42. The beams 3, 3' are designed in such a way that the contact surfaces create a force-locking connection between the cells and the beams 3, 3', with one cell being embedded between two beams 3, 3'. Another embodiment can be a direct clipping of two plastic or metal beams. Example 4 (Fig. 1D)

[0054] In this example, the beams 3, 3' are made of insulating plastic and each have a fixing element 4, 5 at each end, designed as a tapered extension of the beam. A cell can be inserted between two beams 3 and 3' for fixing. However, it is also conceivable to use only one beam 3 for fixing and to attach it to one side of the cell. To increase mechanical stability, metal inserts are incorporated into the plastic. The cells are attached between two beams 3, 3' using an adhesive connection 43. Example 5 (Fig. 1E)

[0055] Beam support as in Example 1, with the difference that beams 3 and 3' are reinforced with metal on the outside for stiffening at elements 4 and 5. The fastening options shown in Examples 1 to 4 can also be implemented here. Embodiment 6 (Fig. 1F)

[0056] Beam support as in Example 1, with the difference that beams 3 and 3' are designed with an internal stiffener made of metal 45. The fastening options shown in Examples 1 to 4 can also be implemented here. Example 7 (Fig. 1G)

[0057] Beam support as in Example 1, with the difference that beams 3 and 3' are designed as a metal / plastic sandwich. The fastening options shown in Examples 1 to 4 can also be implemented here. Example 8 (Fig. 1H)

[0058] In contrast to the exemplary embodiments shown above, the beam fastening is only implemented on one side, with washers 47 and 47' being used on the rear side for fixation. The sub-variants shown in examples 1 to 7 can also be implemented here. Example 9 (Fig. 1I)

[0059] In this design variant, no beam is attached to the cell. The cell is housed in a housing using a potting compound 50, thus forming the device for fixing 3. Alternatively, the potting compound can be used directly instead of the housing. To ensure the absorption of forces into the cell via the arresters 1 and 2, protruding rivets 51 or riveted extensions are attached to the cell taps. The cells are then supported in the potting material via these extensions. Embodiment 10 (Fig. 1J)

[0060] In this design variant, no beam is attached to the cell. The cell is housed in a housing using a potting compound 50. Alternatively, the potting compound can be used directly instead of the housing. To ensure that forces are absorbed into the cell via arresters 1 and 2, the cell pack is designed so that the cell pack material (aluminum composite foil) protrudes, e.g., has ears 52 or bulges. These are then cast into the potting compound. The cells are then supported in the potting material via these widened portions. Example 11

[0061] In contrast to the embodiments shown in Examples 1-8, where the beams are individual components, here the beam is a component of the battery module, cell block, or system housing. The cells are therefore directly attached to a superordinate housing using the methods shown in Examples 1-8. Example 12

[0062] In this example, the aluminum composite foil also has overhangs. These overhangs are then attached to the beam. The following joining methods can be used, for example: - rivets - Screws - Terminals - Form-fitting mounting of tenons or similar. - Stick - Welding - Soldering - Clinching - Nailing - Put - clips Example 13

[0063] In this example, the beam is laminated directly into the cell. This creates a strong, force-locking connection between the beam and the cell. In principle, the beam can be laminated anywhere in the cell. For the reasons listed above, the position at the height of the arresters is preferred.

[0064] Fig. 2A and Fig. Figure 2B shows an exploded view of two energy storage cell units 10 and 10' according to the invention, which are designed as flat cell units, for example lithium-ion batteries, and each have two supply and discharge conductors 1 and 2 on one side, the top side. The perspective is in Fig. 2A selected from the front, while Fig. 2B shows the energy storage cell units according to the invention from the other side. These arresters are designed as flat metal contacts. The inventive fixing device 3, which in this embodiment is designed as an elongated bar, is applied to one side of the arresters 1 and 2; the bar has fixing elements 4 and 5 projecting beyond the width of the respective energy storage cell units 10 and 10'. Furthermore, the bar 3 has bulges 6 located in its center, which serve as spacers 6 with respect to the adjacently arranged energy storage cell unit 10', etc. The bar 3 also has two through-holes 8 and 9, via which a fixing of several energy storage cell units to one another, as in Fig. 2A and Fig. 2B, for example, by inserting a threaded rod or similar. In this case, the arresters 1 and 2 must also have corresponding through-holes. On the other side of the arresters 1 and 2, the side on which the beam 3 rests, washers 47 and 47' are provided as counterparts to this beam, so that each arrester 1 or 2 lies between the beam 3 and a washer 47 or 47' and is embedded by them.

[0065] Fig. 3A and Fig. 3B now show a composite ensemble of two energy storage cell units 10 and 10' with the components shown in the exploded view in Fig. 2A and Fig. 2B are shown. Fig. 3A corresponds to the Fig. 2A and Fig. 2B, while Fig. 3B shows a rear view. Fig. 3B shows the arrangement of the washers 47 and 47' on the back of the respective arrester structures 1 and 2.

[0066] The functionality of the spacer 6 can also be seen.

[0067] Fig. 4 shows a preferred embodiment of an energy storage module 20 according to the invention. As shown in this exploded view, a parallel arrangement of a total of six energy storage cell units 10 can be introduced into a module insulator 21 provided for this purpose, wherein the module insulator 21 is essentially cuboid-shaped and is open at least on the upper side, i.e., the side via which the parallel energy storage cell units 10 can be inserted. The module insulator 21 has a plurality of receptacles on this open side, into which the fixing elements 4 and 5 of the respective energy storage cell units 10 can be inserted by fully inserting the energy storage cell units 10 into the module insulator 21. This position represents the working position of the energy storage cell units 10.Thus, in a preferred embodiment, the receiving means 22 and the fixing elements 4 and 5 are designed to complement each other. In the embodiment shown in . Fig. In the embodiment shown in Figure 4, the receiving options 22 are formed as corresponding protrusions. Furthermore, the module insulator 21 has guide rails or corresponding recesses 23 in the insertion direction of the energy storage cell units 10, by means of which the position of the energy storage cell units 10 in the module insulator 21 is determined accordingly.

[0068] The respective fixing elements 4 and 5 can, for example, each be provided with a rubber holder 30 for further shock absorption.

[0069] The module insulator 21 itself can in turn be inserted into a module housing 25, which can further have an insulation frame 31 and an intercooler plate 26 at the bottom.

[0070] For final fixation of the energy storage cell units 10 in the module insulator, the latter is closed with a clamping spacer bar 24, which essentially acts as a cover, so that the energy storage cell units are firmly fixed in the module insulator 21. To control the energy storage cell units 10, a CSE board 28 with corresponding control electronics can also be provided, which can be mounted on a CSE housing base 28'. The unit is then provided with a module cover 29.

Claims

[1] Energy storage cell unit (10) comprising at least two arresters (1, 2) for supplying or discharging electrical energy, wherein at least one device (3) for fixing the energy storage cell unit (10) is provided on at least one side of the energy storage cell unit (10), which device has at least two elements (4, 5) by means of which the fixing of the energy storage cell unit (10) at the place of use takes place, the device (3) for fixing is designed in the form of a supporting beam which is attached to at least one side of the energy storage cell unit (10), at the respective end of which the element (4, 5) is designed as a tapered extension of the beam, and the device (3) is made of an insulating plastic, wherein the two arresters (1, 2) of the energy storage cell unit (10) are arranged on the same side of the energy storage cell unit (10) and the device (3) for fixing the energy storage cell unit (10) is connected to the energy storage cell unit (10) via the arresters (1, 2). [2] Energy storage cell unit (10) according to claim 1, characterized by that the device (3) for fixing to the energy storage cell unit (10) is formed in one piece or as a separate component. [3] Energy storage cell unit (10) according to one of the preceding claims, characterized by that the device (3) for fixing has a spacer (6). [4] Energy storage cell unit (10) according to one of the preceding claims, characterized by that the fixing device (3) consists of a fiber-reinforced plastic and / or a plastic with metal inserts. [5] Energy storage cell unit (10) according to one of the preceding claims, characterized by that the fixing device (3) has at least two recesses (8, 9) via which a positive and / or non-positive connection to the energy storage cell unit (10) can be established. [6] Energy storage cell unit (10) according to one of the preceding claims, characterized by that the device (3) for fixing the energy storage cell unit (10) to the energy storage cell unit (10) is connected to the energy storage cell unit (10) by screwing, riveting, welding, gluing or integrally molding. [7] Energy storage cell unit (10) according to one of the preceding claims, characterized by that the energy storage cell unit (10) is designed as a rectangular flat cell, the two conductors (1, 2) of which are arranged on one side of the flat cell. [8] Energy storage module (20), comprising a module insulator (21), and at least two energy storage cell units (10, 10') according to one of the preceding claims, which can be installed parallel to one another in the module insulator (21), wherein the module insulator (21) has a receiving possibility (22) for the elements (4, 5) for fixing the energy storage cell unit (10). [9] Energy storage module (20) according to claim 8, characterized by that the module insulator (21) has guide recesses (23) which are arranged at the positions (10) of the respective energy storage cell units. [10] Energy storage module (20) according to claim 8 or 9, characterized by that the module insulator (21) has a capacity for 2 to 24, preferably 4 to 12 energy storage cell units (10). [11] Energy storage module (20) according to one of claims 8 to 10, characterized by that it comprises at least one of the following components: a) a clamping bar (24) which can be attached to the module insulator (21) above the devices for fixing (3) the energy storage cell units (10), b) a module housing (25) which can be arranged around the module insulator (21) and / or into which the module insulator (21) can be inserted in a form-fitting and / or force-fitting manner, c) cooling or supporting fin / plate with at least one flat cell attached to it, d) guide grooves arranged parallel to each other for receiving the cooling or supporting fin / plate, e) an intercooler plate (26), f) a flexboard (27), g) a CSE board (28) and / or h) a housing cover (29).

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