Cover for a cell contact system of an electrical energy storage unit

Abstract

The invention relates to a cover (10) for a cell contact system (12) of an electrical energy storage unit (100) for a vehicle. The invention also relates to an electrical energy storage unit (100) and to a vehicle having the cover (10) or having the electrical energy storage unit (100). The cover (10) comprises a preferably plate-shaped insulating body (14) that is designed to cover the cell contact system (12) so as to form a touch guard; and at least one controller (16), preferably cell controller, configured to control a flow of electrical energy through the cell contact system (12), wherein the at least one controller (16) is received at least partially by the insulating body (14).

Description

[0001] Cover for a cell contact system of an electrical energy storage device

[0002] Description

[0003] The invention relates to a cover for a cell contact system of an electrical energy storage device for a vehicle. The invention further relates to an electrical energy storage device and a vehicle comprising the cover or the electrical energy storage device.

[0004] Vehicle batteries known from practice, such as those used as energy storage devices or as traction batteries in hybrid vehicles or electric vehicles, typically have several battery storage cells arranged in stacks, forming one or more battery cell stacks. The cell poles of these battery cell stacks are typically electrically connected or interconnected using a cell contact system. Cell control devices or cell module controllers (also cell management controllers) are also used to control the flow of energy. Particularly in battery systems consisting of several battery cell stacks arranged one above the other and / or side by side, so-called multilayer high-voltage batteries or multilayer batteries, the cell control devices are often positioned laterally next to the battery cell stacks.The cell control devices thus disadvantageously occupy a position in the battery system required for additional battery cell stacks. Existing systems therefore resort to solutions in which the cell control devices are arranged outside the assembly on battery cell stacks or completely outside the electrical energy storage device. This entails, among other things, the significant disadvantages of increased wiring complexity and the cell control devices being more easily damaged by external influences. Especially for multi-layer high-voltage batteries or multi-layer batteries, a more efficient use of the required installation space without these disadvantages is desirable.

[0005] In this context, document D1 (US 10,714,717 B2) proposes a solution in which a cell module controller is integrated into the cell contacting system. This has the disadvantage, among other things, that live parts of the cell contacting system are exposed when the cover is removed, e.g., when replacing a defective cell module controller, and thus pose a danger to bystanders. Furthermore, the position of the cell module controller is disadvantageously limited to an arrangement between the cell poles. This position is disadvantageously located above the venting openings of the battery storage cells, so that in the event of venting of a battery storage cell, there is an increased risk of damage to the cell module controller due to escaping hot gas. The object of the present invention is to provide a technology with which the disadvantages of known approaches can be avoided.The object of the invention is, in particular, to improve known energy storage devices with regard to the required installation space, without compromising the safety of bystanders against electric shock and / or without increasing the risk of damage to the cell control devices in the event of degassing.

[0006] These objects are achieved by devices having the features of the independent claims. Advantageous further developments are specified in the dependent claims and the description.

[0007] A basic concept of the invention is to integrate the control device (e.g., at least one cell control device) into an insulator body of a high-voltage cover. In this respect, the control device and the insulator body form a combined component.

[0008] One aspect relates to a cover for a cell contacting system of an electrical energy storage device for a vehicle.

[0009] The cover comprises an insulator body (e.g., plate-shaped) and at least one control device. To provide contact protection (e.g., against electric shock), the insulator body is designed to cover the cell contact system.

[0010] The at least one control device can preferably be embodied as a cell control device configured to control an electrical energy flow via the cell contact system. The at least one control device is at least partially accommodated by the insulator body.

[0011] One advantage of the invention can be that, in the event of a defect in a control device, the cover as a whole (i.e. the insulator body together with the at least one control device) can be removed and replaced. This can reduce the risk of electric shock to bystanders during the disassembly process. At the same time, the integration of the at least one control device into the insulator can represent an advantageous arrangement option, since the installation space freed up to the side next to the battery cell stacks can be used in this way, for example, for additional battery cell stacks or for other purposes. At the same time, the at least one control device is no longer tied to a positioning above the venting openings, but can be arranged at any suitable location on the insulator body, which can reduce the risk of damage to the at least one control device in the event of venting.By integrating at least one control device into the isolator, the required installation space in the vertical direction (Z-direction) can also be reduced. Advantageously, two component functions are combined into one component to minimize the required installation space.

[0012] The at least one control device can be, for example, a cell management controller (CMC). The at least one control device can be configured to detect a duration of the electrical energy flow and / or a temperature of the cell contact system (e.g., in a contact area to the cell poles of a battery cell stack). The insulator body can be, for example, an insulator plate and / or an insulator cover. The connection between the storage cells and the control device can be implemented as a fixed or detachable connection.

[0013] In one embodiment, the insulator body can have at least one recess (e.g., at least one depression). The at least one control device can be secured in the at least one recess. For example, the at least one recess defines an internal volume, and the at least one control device is arranged (e.g., entirely) within the internal volume. For example, the insulator body can be a housing bottom shell for the control device. This can further reduce the required installation space in the vertical direction.

[0014] In one embodiment, the at least one control device can be (e.g., completely) recessed and / or embedded in the at least one recess. Optionally, an end side (e.g., top side) of the at least one control device opposite the insulator body can be substantially flush with and / or terminate in an end side (e.g., top side) of the insulator body. For example, the end side of the at least one control device opposite the insulator body and the end side of the insulator lie in one plane. It is also conceivable for the at least one control device not to protrude beyond the insulator body. This can protect the at least one control device from external damage and / or further reduce the required installation space in the vertical direction.

[0015] In one embodiment, the at least one control device can be non-detachably connected to the insulator body. Preferably, the at least one control device is non-detachably connected to the insulator body by means of at least one fastening rivet. Optionally, the insulator body can be designed as a plastic injection-molded part. For example, it is conceivable for the at least one control device to be integrated into the insulator body, at least in sections, by overmolding. However, any other expediently suitable type of fastening is also conceivable, for example by means of positive locking (e.g., by means of locking elements) and / or frictional locking (e.g., by pressing the at least one control device into the insulator body) and / or material bond (e.g., by means of adhesive). This has the advantage that the cover can be assembled and disassembled as a one-piece, integral component.

[0016] In one embodiment, the insulator body may comprise a material that is an electrical non-conductor. For example, the non-conductor comprises a plastic (such as glass-fiber reinforced plastic), a ceramic material, a glass material, and / or a silicone material.

[0017] Alternatively or additionally, it is conceivable for the at least one control device to have an electrically insulating protective cap, which is arranged on an end side of the at least one control device opposite and / or facing away from the insulator body (e.g., on a top side) to form contact protection. Preferably, the end side is substantially flush with an end side (e.g., with a top side) of the insulator body. This can further reduce the risk of electric shock to bystanders.

[0018] In one embodiment, the cover may further comprise at least one conductor device configured to electrically connect the at least one control device and the cell contacting system. Preferably, the at least one conductor device comprises a flexible conductor foil. This advantageously allows the weight of the cover to be reduced.

[0019] It is conceivable that the insulator body has at least one through-opening and that the at least one conductor device extends from one side (e.g. from an upper side) of the insulator body, on which the at least one control device is arranged, through the at least one through-opening to a side of the insulator body opposite the control device (e.g. to an underside).

[0020] In one embodiment, the at least one control device can have a plurality of control devices. The insulator body can have a plurality of recesses (e.g., a plurality of depressions). One of the plurality of control devices can be fastened in each of the plurality of recesses. This can further reduce the wiring effort. Advantageously, for example, control devices for a plurality of battery cell stacks can also be accommodated by the insulator body. A further aspect relates to an electrical energy storage device. The electrical energy storage device has a battery cell stack, a cell contacting system, and a cover as disclosed herein. The battery cell stack has a plurality of cell poles. The cell contacting system electrically connects and / or interconnects the cell poles (e.g., in series with one another). The insulator body covers the cell contacting system to form contact protection (e.g., completely and / or substantially flush).Optionally, the electrical energy storage device has a housing. The battery cell stack, the cell contact system, and the cover are arranged in the housing. The housing can further have a housing lid, which, for example, covers the cover. The battery cell stack can have several storage cells arranged one behind the other in a stacking direction. However, it is also conceivable for the battery cell stack to have several rows of storage cells arranged next to one another in a stacking direction, transverse to the stacking direction.

[0021] In one embodiment, the cell contact system can be arranged between the cover and the battery cell stack. This prevents the current-carrying cell contact system from being exposed, which can further increase electrical safety.

[0022] Alternatively or additionally, the at least one recess can be arranged on a side of the insulator body opposite and / or facing away from the cell contact system (e.g. top side).

[0023] In one exemplary embodiment, the insulator body and / or the battery cell stack can have at least one venting opening for discharging gas escaping from the battery cell stack. For example, the at least one control device can be arranged so as not to overlap the at least one venting opening. Alternatively or additionally, the at least one control device can be arranged so as not to be flush with the at least one venting opening. Alternatively or additionally, the at least one control device can be arranged offset laterally (e.g., along a direction transverse to a stacking direction of the battery cell stack) relative to the at least one venting opening. As a result, the escaping gas can be guided past the at least one control device when a storage cell is degassing. Damage to the at least one control device caused by the escaping gas when degassing can thus be prevented.

[0024] In one embodiment, the at least one control device can comprise a plurality of control devices. Alternatively or additionally, the at least one conductor device can comprise a plurality of conductor devices. The plurality of control devices and / or the plurality of conductor devices can be arranged offset from one another, viewed in a stacking direction of the battery cell stack or transversely to a stacking direction of the battery cell stack. This can further reduce the wiring effort.

[0025] In one embodiment, the cell contacting system can comprise a carrier plate and at least one cell pole connector accommodated by the carrier plate. Preferably, the at least one cell pole connector electrically connects a portion of the plurality of cell poles (e.g., two of the plurality of cell poles) to one another. The at least one conductor device can electrically connect the at least one cell pole connector and the at least one control device.

[0026] In one exemplary embodiment, the electrical energy storage device can comprise a further battery cell stack, a further cell contacting system, and a further cover as disclosed herein. The further battery cell stack can comprise a plurality of cell poles. The further cell contacting system can electrically connect the cell poles of the further battery cell stack (e.g., connect and / or connect them in series). The insulator body of the further cover can cover the further cell contacting system to form contact protection. The further battery cell stack can be arranged laterally next to the battery cell stack or in a stack above the cover. As a result, the installation space freed up by integrating the at least one control device into the insulator body can be advantageously used for further battery cell stacks, which can increase the capacity of the battery.

[0027] A further aspect relates to a vehicle (e.g., motor vehicle) comprising a cover as disclosed herein or an electrical energy storage device as disclosed herein. Preferably, the motor vehicle is a commercial vehicle. In other words, the commercial vehicle may be a motor vehicle whose design and equipment are such that it is designed to transport people, goods, or trailers. For example, the motor vehicle may be a truck, a bus, and / or a semitrailer truck that is at least partially electrically powered.

[0028] The above-described preferred embodiments and features of the invention can be combined with one another as desired. Details and advantages of the invention are described below with reference to the accompanying drawings. They show:

[0029] Figure 1 shows an electrical energy storage device according to an embodiment;

[0030] Figure 2 is a schematic exploded view of the electrical energy storage device from Figure 1;

[0031] Figure 3 shows two battery cell stacks of an electrical energy storage device according to an embodiment;

[0032] Figure 4 shows an electrical energy storage device according to an embodiment;

[0033] Figure 5 shows the electrical energy storage device from Figure 4 with a transparent cover;

[0034] Figure 6 is a schematic exploded view of an electrical energy storage device according to an embodiment; and

[0035] Figure ? a schematic exploded view of an electrical energy storage device according to one embodiment.

[0036] Figures 1 and 2 show (in sections) an electrical energy storage device 100 for a vehicle (not shown) according to one embodiment.

[0037] The electrical energy storage device 100 has a battery cell stack 20, a cell contact system 12 and a cover 10 for the cell contact system 12 of the electrical energy storage device 100.

[0038] The battery cell stack 20 has a plurality of cell poles 22 (see Figure 2). The cell contact system 12 electrically connects and / or interconnects the cell poles 22. Preferably, the cell contact system 12 electrically connects the cell poles 22 in series. It is conceivable that all cell poles 22 or only some of the cell poles 22 are electrically connected and / or interconnected by the cell contact system 12.

[0039] The cover 10 comprises an insulator body 14 and at least one control device 16. This is preferably a plate-shaped insulator body 14. The insulator body 14 can also be designed, for example, as an insulator cover and / or an insulator cap and / or an insulator hood. To provide contact protection, the insulator body 14 is designed to cover the cell contact system 12.

[0040] The at least one control device 16 is preferably configured to control an electrical energy flow via the cell contacting system 12. The at least one control device 16 is preferably a cell control device. For example, the control device 16 can be a cell management controller (CMC) or cell module controller. It is conceivable that the at least one control device 16 is configured to detect a duration of the electrical energy flow and / or a temperature of the cell contacting system 12 (e.g., in a contacting region of the cell contacting system 12 to the cell poles 22).

[0041] The at least one control device 16 is at least partially accommodated by the insulator body 14. For example, the at least one control device 16 is at least partially integrated into the insulator body 14.

[0042] In the electrical energy storage device 100, the insulator body 14 covers the cell contact system 12 to provide contact protection. Preferably, the insulator body 14 completely covers the cell contact system 12.

[0043] Optionally, the electrical energy storage device comprises a housing 24. The battery cell stack 20, the cell contact system 12, and the cover 10 can be arranged in the housing 24. The housing 24 can comprise a housing cover (not shown) that covers the cover 10. For example, the housing 24 with the housing cover can (e.g., completely) enclose the battery cell stack 20, the cell contact system 12, and the cover 10.

[0044] The insulator body 14 can have at least one recess 18. Preferably, the at least one recess 18 is at least one depression. The at least one control device 16 can be secured in the at least one recess 18. Preferably, the at least one recess 18 defines an internal volume. For example, the at least one control device 16 is arranged in the internal volume (e.g., entirely within the internal volume).

[0045] The at least one control device 16 can be (e.g., completely) recessed and / or embedded in the at least one recess 18. As shown in Figure 1, the at least one control device 16 can have multiple control devices 16. Furthermore, the insulator body 14 can have multiple recesses 18 (e.g., depressions). Preferably, one of the multiple control devices 16 is mounted in each of the multiple recesses 18.

[0046] An end side of the at least one control device 16 that is opposite and / or remote from the insulator body 14 (e.g., a top side 28, see Figure 2) can be flush with or terminate in an end side (e.g., with a top side 26) of the insulator body 14. For example, the end side of the at least one cell controller 16 that is opposite and / or remote from the insulator body 14 and the end side of the insulator body 14 can lie (e.g., substantially) in the same plane. It is also conceivable for the at least one control device 16 not to protrude beyond the insulator body 14.

[0047] As can be seen in Figure 2, the cell contact system 12 can be arranged between the cover 10 and the battery cell stack 20. Furthermore, it is conceivable that the at least one recess 18 is arranged on a side of the insulator body 14 opposite and / or facing away from the cell contact system 12 (e.g., on the top side 26).

[0048] The at least one control device 16 can be non-detachably connected to the insulator body 14. It is conceivable that the at least one control device 16 is non-detachably connected to the insulator body 14 by means of at least one fastening rivet 34 (see Figure 1). Furthermore, it is conceivable that the insulator body 14 is designed as a plastic injection-molded part. Optionally, the at least one control device 16 can be integrated into the insulator body 14, at least in sections, by overmolding. However, any other expediently suitable type of fastening is also conceivable, for example by means of positive locking (e.g., locking elements) and / or force locking (e.g., by pressing the at least one control device 16 into the insulator body 14) and / or material bond (e.g., by means of an adhesive).

[0049] Optionally, the insulator body 14 comprises a material that is an electrical non-conductor. For example, the non-conductor can be a plastic (e.g., glass-fiber-reinforced plastic), a ceramic material, a glass material, and / or even a silicone material. However, any other material suitable as a non-conductor is also conceivable.

[0050] The at least one control device 16 can have an electrically insulating protective cap. To provide contact protection, the protective cap can be arranged on an end side of the at least one control device 16 that is opposite and / or remote from the insulator body 14 (e.g., on a top side 28, see Figure 2). For example, the protective cap comprises a material that is a non-conductor as described above. Preferably, the top side 28 can be flush with and / or terminate in an end side (e.g., top side 26) of the insulator body 14.

[0051] The battery cell stack 20 can comprise a plurality of storage cells 22 arranged one behind the other in a stacking direction S. It is conceivable that the battery cell stack 20 can comprise a plurality of rows 27, 29 of storage cells 22 arranged one behind the other in a stacking direction S. The rows 27, 29 of storage cells 22 arranged one behind the other in a stacking direction S can be covered by a common cover 10 (see Figure 2).

[0052] However, it is also conceivable that the electrical energy storage device 100 has a plurality of battery cell stacks 20, 30 (as shown by way of example in Figure 3, e.g. two battery cell stacks 20, 30), each of which is covered by a cover 10; 40 (see also later explanations with regard to Figures 6 and 7).

[0053] The cover 10 can have a conductor device 36 which is designed to electrically connect and / or interconnect the at least one control device 16 and the cell contacting system 12. The at least one conductor device 36 preferably has a flexible conductor foil. It is conceivable for the insulator body 14 to have at least one through-opening. The at least one conductor device 36 can run from one side (e.g. from the top side 26) of the insulator body 14, on which the at least one control device 16 is arranged, through the at least one through-opening to a side of the insulator body 14 opposite the control device 16 (e.g. to an underside). In the case of multiple control devices 16, the insulator body 14 can have multiple through-openings, through each of which a conductor device 36 runs.

[0054] As can be seen from Figures 1, 4 and 5, the insulator body 14 and / or the battery cell stack 20 can have at least one venting opening 23; 25 for discharging gas escaping from the battery cell stack 20. The at least one venting opening 23 of the battery cell stack 20 can preferably be arranged in alignment with the at least one venting opening 25 of the insulator body 14. It is conceivable that the at least one control device 16 is not arranged so as to overlap the at least one venting opening 23; 25. For example, it is also conceivable that the at least one control device 16 is not arranged in alignment with the at least one venting opening 23; 25. Furthermore, it is conceivable that the at least one control device 16 is arranged laterally (e.g., along a direction transverse to the stacking direction S of the battery cell stack 20) ​​offset from the at least one venting opening 23; 25.

[0055] It is conceivable that the at least one control device 16 comprises a plurality of control devices 16 and / or that the at least one conductor device 36 comprises a plurality of conductor devices 36. The plurality of control devices 16 and / or the plurality of conductor devices 36 can be arranged offset from one another (e.g., as viewed in the stacking direction S of the battery cell stack 20 or transversely to the stacking direction S of the battery cell stack 20).

[0056] Figures 4 and 5 show an electrical energy storage device 100 according to one embodiment. In Figure 5, the cover 10 is shown transparent.

[0057] The cell contacting system 12 can include a carrier plate and at least one cell pole connector 33 received by the carrier plate. The at least one cell pole connector 33 can electrically connect a portion of the plurality of cell poles 22 (e.g., two of the plurality of cell poles 22) to one another. The at least one cell pole connector 33 can preferably include a plurality of cell pole connectors 33 that connect a plurality of cell poles 22 of the battery cell stack 20 such that the storage cells 22 of the battery cell stack 20 are connected in series. The at least one conductor device 36 can electrically connect the at least one cell pole connector 33 and the at least one control device 16.

[0058] Figures 6 and 7 show schematic exploded views of an electrical energy storage device 100 according to two embodiments.

[0059] In the embodiments of Figures 6 and 7, the electrical energy storage device 100 can have a further battery cell stack 30. The further battery cell stack 30 can in turn have a plurality of cell poles 32. The electrical energy storage device 100 can further have a further cell contact system 38 that electrically connects the cell poles 32 of the further battery cell stack 30 (e.g., in series). The electrical energy storage device 100 can further have a further cover 40 as disclosed herein. The insulator body 42 of the further cover 40 can cover the further cell contact system 38 to form a contact protection.

[0060] As can be seen from Figures 6 and 7, the embodiments shown here differ in the arrangement of the further battery cell stack 30 relative to the battery cell stack 20.

[0061] In the embodiment shown in Figure 6, the further battery cell stack 30 can be arranged laterally next to the battery cell stack 20.

[0062] In the embodiment shown in Figure 7, the further battery cell stack 30 can be arranged in a stack-like manner above the cover 10.

[0063] The vehicle mentioned above (not shown) can expediently also have the cover 10 as disclosed herein. Furthermore, it is conceivable that the vehicle has the electrical energy storage device 100 as disclosed herein. Preferably, the vehicle is a motor vehicle.

[0064] Although the invention has been described with reference to specific embodiments, it will be apparent to a person skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. Consequently, the invention is not intended to be limited to the disclosed embodiments, but is intended to include all embodiments falling within the scope of the appended claims. In particular, the invention also claims protection for the subject matter and features of the subclaims, independent of the claims referred to. All ranges herein are to be understood as disclosed in such a way that, as it were, all values ​​falling within the respective range are individually disclosed, e.g., also as preferred, narrower outer limits of the respective range.

[0065] List of reference symbols

[0066] 10 Cover

[0067] 12 Cell contact system

[0068] 14 Insulator body

[0069] 16 Control device

[0070] 18 Recess

[0071] 20 battery cell stacks

[0072] 21 memory cells

[0073] 22 cell pole

[0074] 23 Degassing opening of the battery cell stack

[0075] 24 housings

[0076] 25 Degassing opening of the insulator body

[0077] 26 Top of the insulator body

[0078] 27 row of the battery cell stack

[0079] 28 Top of the control unit

[0080] 29 row of the battery cell stack

[0081] 30 additional battery cell stacks

[0082] 31 memory cells

[0083] 32 cell pole

[0084] 33 cell pole connectors

[0085] 34 fastening rivet

[0086] 36 Ladder device

[0087] 38 additional cell contact system

[0088] 40 additional coverage

[0089] 42 Insulator body of the further cover

[0090] 100 electrical energy storage units

Claims

Patent claims 1. A cover (10) for a cell contacting system (12) of an electrical energy storage device (100) for a vehicle, wherein the cover (10) comprises: a preferably plate-shaped insulator body (14) designed to cover the cell contacting system (12) to form a contact protection device; and at least one control device (16), preferably a cell control device configured to control an electrical energy flow via the cell contacting system (12), wherein the at least one control device (16) is at least partially accommodated by the insulator body (14).

2. Cover (10) according to claim 1, wherein the insulator body (14) has at least one recess (18), preferably at least one depression, and the at least one control device (16) is fastened in the at least one recess (18), wherein preferably the at least one recess (18) delimits an internal volume and the at least one control device (16) is arranged in the internal volume.

3. Cover (10) according to claim 2, wherein the at least one control device (16) is preferably completely countersunk and / or embedded in the at least one recess (18); and / or an end side, preferably top side (28), of the at least one control device (16) opposite the insulator body (14) is substantially flush with an end side, preferably top side (26), of the insulator body (14).

4. Cover (10) according to one of the preceding claims, wherein the at least one control device (16) is non-detachably connected to the insulator body (14), wherein preferably the at least one control device (16) is non-detachably connected to the insulator body (14) by means of at least one fastening rivet (34); and / or the insulator body (14) is designed as a plastic injection-molded part and further preferably the at least one control device (16) is integrated at least partially into the insulator body (14) by overmolding.

5. Cover (10) according to one of the preceding claims, wherein the insulator body (14) comprises a material which is an electrical non-conductor; and / or the at least one control device (16) has an electrically insulating protective cap, which is arranged on an end side, preferably the top side (28), of the at least one control device (16) opposite the insulator body (14) to form contact protection, and which is preferably substantially flush with an end side, preferably the top side (26), of the insulator body (14). Cover (10) according to one of the preceding claims, further comprising at least one conductor device (36) designed to electrically connect the at least one control device (16) and the cell contacting system (12), wherein the at least one conductor device (36) preferably comprises a flexible conductor foil.Cover (10) according to claim 6, wherein the insulator body (14) has at least one through-opening, and the at least one conductor device (36) extends from one side, preferably the top side (26), of the insulator body (14), on which the at least one control device (16) is arranged, through the at least one through-opening to a side, preferably the bottom side, of the insulator body (14) opposite the control device (16). Cover (10) according to one of the preceding claims, wherein the at least one control device (16) has a plurality of control devices (16), and the insulator body (14) has a plurality of recesses (18), preferably a plurality of depressions, wherein one of the plurality of control devices (16) is fastened in each of the plurality of recesses (18).Electrical energy storage device (100) comprising: a battery cell stack (20) having a plurality of cell poles (22); a cell contact system (12) that electrically connects the cell poles (22), preferably in series; and a cover (10) according to one of the preceding claims, wherein the insulator body (14) covers the cell contact system (12) to form a contact protection; and optionally a housing (24) in which the battery cell stack (20), the cell contact system (12), and the cover (10) are arranged.

10. Electrical energy storage device (100) according to claim 9, wherein the cell contact system (12) is arranged between the cover (10) and the battery cell stack (20); and / or the at least one recess (18) is arranged on a side of the insulator body (14) opposite the cell contact system (12), preferably the top side (26).

11. Electrical energy storage device (100) according to one of claims 9 or 10, wherein the insulator body (14) and / or the battery cell stack (20) has at least one venting opening (23; 25) for discharging gas escaping from the battery cell stack (20), and the at least one control device (16) is arranged so as not to overlap the at least one venting opening (23; 25); and / or is not arranged in alignment with the at least one venting opening (23; 25); and / or is arranged laterally, preferably along a direction transverse to a stacking direction (S) of the battery cell stack (20), offset from the at least one venting opening (23; 25).

12. Electrical energy storage device (100) according to one of claims 9 to 11, wherein the at least one control device (16) has a plurality of control devices (16) and / or the at least one conductor device (36) has a plurality of conductor devices (36), wherein the plurality of control devices (16) and / or the plurality of conductor devices (36) are arranged offset from one another, viewed in a stacking direction (S) of the battery cell stack (20) or viewed transversely to a stacking direction (S) of the battery cell stack (20).

13. Electrical energy storage device (100) according to one of claims 9 to 12, wherein the cell contacting system (12) has a carrier plate and at least one cell pole connector (33) received by the carrier plate, wherein preferably the at least one cell pole connector (33) electrically connects a part of the plurality of cell poles (22), more preferably two of the plurality of cell poles (22), and the at least one conductor device (36) electrically connects the at least one cell pole connector (33) and the at least one control device (16).

14. An electrical energy storage device (100) according to one of claims 9 to 13, comprising a further battery cell stack (30) having a plurality of cell poles (32); a further cell contacting system (38) that electrically connects the cell poles (32) of the further battery cell stack (30), preferably in series; and a further cover (40) according to one of claims 1 to 8, wherein the insulator body (42) of the further cover (40) covers the further cell contacting system (38) to form a contact protection device, and the further battery cell stack (30) is arranged laterally next to the battery cell stack (20) or in a stack above the cover (10).

15. A vehicle, preferably a motor vehicle, comprising: a cover (10) according to one of claims 1 to 8; or an electrical energy storage device (100) according to one of claims 9 to 14.

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