Electrical energy store for motor vehicle

Abstract

The invention relates to an electrical energy store (1) for a motor vehicle, comprising a housing element (2); having storage units (3) which are held on the housing element (2) and are designed to store electrical energy, which storage units are electrically connected to one another and thus form a high-voltage accumulator (5) for storing electrical energy; the housing element (2) has at least one storage unit (3), and at least one electronic monitoring module (6), which is designed to be separate from the housing element (2) and from the storage unit (2), for monitoring the storage unit (3), the monitoring module (6) being fastened to the housing element (2) by means of at least one fastening element (7) via which at least one low-voltage line (9) is also held on the housing element (2).

Description

Technical Field

[0001] The invention relates to an electrical energy accumulator for a motor vehicle according to the preamble of claim 1 . Background Art

[0002] From EP 3 071 983 B1, a known device for real-time monitoring of the voltage and differential voltage of the anode and cathode in a metal ion battery is known. In addition, US 9 846 199 B2 discloses a vehicle with an electric drive system, which includes a rechargeable battery. In addition, from US 7 948 207 B2, a method for operating an electric vehicle is known. Summary of the invention

[0003] The object of the present invention is to provide an electrical energy accumulator for a motor vehicle, which allows a particularly simple assembly of the electrical energy accumulator.

[0004] This object is achieved according to the invention by an electrical energy accumulator having the features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

[0005] The invention relates to an electrical energy storage device for a motor vehicle, also referred to as a vehicle for short. This means that the motor vehicle has an electrical energy storage device in its fully manufactured state. In particular, the motor vehicle, which is preferably designed as a power vehicle, in particular as a passenger car, is a hybrid vehicle or an electric vehicle, in particular a battery electric vehicle (BEV).

[0006] The electrical energy accumulator has a housing element. For example, the housing element is a component of a housing, also referred to as the accumulator housing, which has at least the housing element. The housing element is also referred to as the first housing element. If a housing element is mentioned below, this is to be understood as referring to the first housing element unless otherwise stated. For example, the housing can have at least one second housing element, wherein, for example, the first housing element and the second housing element can be designed to be separate from each other and connected to each other.

[0007] The electric energy accumulator also has storage cells, which are also referred to as battery cells for short. The storage cells are configured to store, in particular electrochemically store electric energy, so that electric energy can be stored by means of the storage cells or in the storage cells and thus by means of the electric energy accumulator or in the electric energy accumulator. The storage cells are electrically connected to each other, so that the storage cells form a high-voltage accumulator for storing electric energy. The high-voltage accumulator is preferably a battery or also referred to as a battery, wherein the battery is in particular a secondary battery. For example, the high-voltage accumulator is a lithium-ion battery, so that, for example, the corresponding storage cell is a lithium-ion battery cell. However, the above and following descriptions can also be transferred to other high-voltage accumulators, batteries and storage cells without any problem. The high-voltage accumulator is also referred to as HVS and is a high-voltage component, the voltage of which, in particular the operating voltage or the rated voltage, is preferably greater than 50 volts, in particular greater than 60 volts and quite preferably several hundred volts. Here, the high-voltage accumulator can provide the voltage.

[0008] For example, a motor vehicle, also referred to as a vehicle, has at least one electric motor in its fully manufactured state, by means of which the motor vehicle can be driven electrically, in particular purely electrically. For this purpose, the electric motor can be supplied with electrical energy stored in a high-voltage accumulator, so that the electric motor can be operated in motor operation and thus as an electric motor. The motor vehicle can be driven, in particular purely electrically, by means of the electric motor. The electric motor is preferably a high-voltage component, the voltage, in particular the operating voltage or the rated voltage of which is preferably greater than 50 volts, in particular greater than 60 volts and quite preferably several hundred volts. The storage unit is at least indirectly, in particular directly, held on the housing element. In particular, it is conceivable that the housing has, in particular defines, a storage space, also referred to as a storage area, in which the storage unit is arranged. For example, the storage space is at least partially formed, in particular defined and quite particularly directly defined by the housing element. It is therefore conceivable that the storage unit is at least partially arranged in the housing element.

[0009] The electrical energy storage device also has at least one electronic monitoring module for monitoring the storage unit. The electronic monitoring module is configured to be separate from the housing element and from the storage unit and is attached to the storage unit and attached to the housing element. In particular, the monitoring module is therefore arranged externally with respect to the storage unit, that is, outside the storage unit, and the storage unit is arranged externally with respect to the monitoring module, and therefore outside the monitoring module. The monitoring of the storage unit by the electronic monitoring module includes, for example, that the electronic monitoring module is configured to determine at least one parameter characterizing the state of the storage unit. The parameter may, for example, include or be the corresponding temperature of the corresponding storage unit. Alternatively or additionally, the parameter may be or include the corresponding voltage of the corresponding storage unit. Alternatively or additionally, the parameter may include the corresponding current provided or capable of being provided by the corresponding storage unit or such a current. The monitoring module may, in particular, determine at least one value of the parameter. The value may be compared as an actual value with a target value, wherein the corresponding storage unit may be monitored according to the comparison. In particular, it is conceivable that the parameter, in particular as a measured variable, is measured and thus recorded by means of at least one sensor element. For example, the sensor element provides a signal, in particular an electrical signal, which characterizes the parameter measured by means of the measured variable. For example, the monitoring module can receive the signal and determine the parameter therefrom and subsequently monitor the storage unit, in particular by comparing the parameter or its value (actual value) with a target value.

[0010] In order to enable an assembly of the electrical energy storage device that can be carried out in a particularly simple and thus time- and cost-effective manner, it is provided according to the invention that the monitoring module is fixed to the housing by means of at least one fixing element, which is in particular designed to be separate from the housing element, the storage unit and the monitoring module, and at least one low-voltage line is also held on the housing element via the fixing element, which is in particular designed to be separate from the housing element, the storage unit, the monitoring module and the fixing element. A low-voltage line can be understood to be a line, for example, designed as a cable, whose current carrying capacity, in particular according to the DIN VDE 0298-4 standard valid at least until July 20, 2022, is lower than the current carrying capacity at least required for transmitting the maximum current intensity that can be provided by the high-voltage storage device. In other words, the low-voltage line is designed at most for transmitting a first current intensity that is lower than a second current intensity that can be provided by the high-voltage storage device at most. The corresponding current intensity can be understood to be a current intensity that is formed or can be formed by the current. In other words, the maximum current intensity that can be transmitted by the low-voltage wire, and therefore the current intensity that can be transmitted via the low-voltage wire at the highest level without damaging or destroying the low-voltage wire, is lower than the current intensity that can be provided by the high-voltage accumulator at the maximum, such as the motor can be supplied with this current intensity, especially when or during the full load operation of the high-voltage accumulator and / or the motor. In particular, it is conceivable that a voltage of up to 48 volts can be applied to the low-voltage wire without damaging or destroying the low-voltage wire. According to the present invention, the fixing element has a dual function. On the one hand, the fixing element is used in particular as a plug to fix the monitoring module on the housing. On the other hand, the fixing element is used in particular as a retainer to hold the low-voltage wire on the housing element by the fixing element. For example, the low-voltage wire is a component of a low-voltage cable harness, which can be assembled particularly simply and thus time- and cost-effectively by using a fixing element for holding the low-voltage wire.

[0011] For example, the low-voltage wire is electrically and / or mechanically connected to the monitoring module. For this purpose, the low-voltage wire, for example, has at least one first contact element, in particular configured as a plug, which is, for example, electrically connected to at least one corresponding second electrical contact of the monitoring module. Therefore, the monitoring module can, for example, provide at least one signal, also referred to as a monitoring signal, in particular an electrical signal, such as a monitoring signal that can be transmitted via the low-voltage wire, in particular from the monitoring module to, for example, other components electrically connected to the low-voltage wire. Therefore, the other components can receive the monitoring signal via the low-voltage wire. In particular, the other components are attached to the high-voltage accumulator and are attached to the monitoring module, and are other components external to the monitoring module and to the high-voltage accumulator, so that the other components are arranged outside the high-voltage accumulator and outside the monitoring module, and the monitoring module and the high-voltage accumulator are arranged outside the other components. In particular, the fixing element enables the low-voltage wire, in particular the entire low-voltage cable harness, to be assembled on the fixing element by hand, i.e. manually and in a simple and thus time- and cost-effective manner, and thus connected to the housing element via the fixing element.

[0012] In order to enable particularly simple assembly of the electrical energy storage device, one embodiment of the invention provides that the fastening element is designed separately from the housing element, separately from the storage unit, separately from the monitoring module and separately from the low-voltage line.

[0013] In particular, it is provided that the fixing element is fixed to the housing element in a non-destructive, detachable manner, so that the fixing element can be removed from the housing element and reconnected to the housing element and then removed from the housing element again without damaging or destroying the fixing element or the housing element. In addition, it is preferably provided that the fixing element is coupled to the low-voltage line and / or to the monitoring module in a non-destructive, detachable manner, so that particularly simple assembly and disassembly can be achieved.

[0014] For example, the fastening element is coupled to the monitoring module and / or to the housing element via a plug connection, in particular to thereby hold the monitoring module on the housing element. This allows for particularly simple and time- and cost-effective assembly and disassembly.

[0015] Another embodiment is characterized in that the fixing element is latched with the housing element and thus fixed to the housing element. The fixing element is thus designed as a latching element, which is also called a clip. The fixing element can thus be assembled in a particularly time- and cost-effective manner, in particular by latching the fixing element with the housing element. For example, while latching the fixing element with the housing element, the fixing element is coupled to the monitoring module and thus the monitoring module is fixed to the housing, thereby enabling a particularly simple, time- and cost-effective assembly.

[0016] The fixing element is preferably formed from plastic. Thus, for example, the fixing element can be handled particularly simply and thus particularly advantageously in terms of time and cost. Therefore, the fixing element is preferably designed as a plastic clip.

[0017] In another particularly advantageous embodiment of the present invention, it is provided that the fixing element has a housing, for example, configured as a through hole, in which the low-voltage conductor, in particular at least one length region of the low-voltage conductor, is at least partially accommodated. In particular, the housing, which is configured as a through hole, is continuous, for example, along the passing direction, so that the low-voltage conductor passes through the through hole along the passing direction. For example, the housing is completely closed along its circumferential direction extending in a plane extending perpendicular to the passing direction and is now completely surrounded by the fixing element, in particular by a wall region of the fixing element configured as a solid, or the housing is open in the plane and here along its circumferential direction at at least or exactly one position. Therefore, for example, the low-voltage conductor can be mounted on the fixing element in such a simple and cost-effective manner that the low-voltage conductor moves relative to the fixing element along the mounting direction extending in the plane and moves here to, in particular, is inserted into the housing.

[0018] In another particularly advantageous embodiment of the invention, a connecting element is provided which is designed to be separate from the fixing element and from the low-voltage line and preferably also separate from the monitoring module, separate from the storage unit and separate from the housing element, by means of which the low-voltage line is held on the fixing element. This allows for a particularly simple and thus time- and cost-effective assembly of the low-voltage line. Quite preferably, the connecting element is designed as a cable tie which is easy to handle and assemble.

[0019] In order to fasten the low-voltage line to the fixing element and via the fixing element to the housing element in a particularly simple manner, it is provided in another embodiment of the invention that the connecting element is passed through a corresponding through-hole, also referred to as a connecting element hole, of the fixing element. Thus, for example, the connecting element can be fastened particularly simply and securely to the fixing element, so that the low-voltage line can be fastened particularly simply and securely to the fixing element.

[0020] In another particularly advantageous embodiment of the invention, the fastening element has a base body and mutually opposing fastening arms, in particular such that the base body is arranged, in particular in the viewing direction, between the fastening arms, also referred to as lever arms. The respective fastening arm is held on the base body so as to be pivotable relative to the base body about a respective pivot axis. This makes it particularly easy to handle and, in particular, to assemble and disassemble the fastening element.

[0021] It has proven to be particularly advantageous here that the respective fixing arm has a respective fixing area arranged on the other side of the respective pivot axis along a respective extension direction of the respective fixing arm, in particular extending perpendicularly to the aforementioned viewing direction, which fixing area engages from behind a respective, in particular solid, wall area of ​​the housing element and / or the monitoring module in order to fix the fixing element and the monitoring module to the housing element, in particular when viewed along the respective extension direction of the respective fixing arm.

[0022] Furthermore, the respective fixed arm has a respective actuating region arranged on the side of the respective pivot axis along the respective extension direction of the respective fixed arm, to which a force can be applied in order to pivot the respective fixed arm about the respective pivot axis relative to the base body and thereby release the respective fixed arm from the housing element. For example, a person can apply a first force to a first actuating region therein with a first finger and a second force to a second actuating region therein with a second finger, in particular in such a way that the respective forces act simultaneously on the respective actuating regions in such a way that the respective forces act along a respective line of action extending, for example, obliquely or perpendicularly to the respective extension direction of the respective fixed arm and in this case parallel to the viewing direction. In particular, for example, a person applies forces to the actuating regions and thus to the fixed arms with a plurality of his fingers, so that these forces are directed towards each other. As a result, the actuating regions are pivoted relative to the base body and towards each other, while the actuating regions are pivoted relative to the base body and away from each other, because the actuating regions are arranged on the side of the respective pivot axis and the actuating regions are arranged on the other side of the respective pivot axis. As a result, the person can operate particularly simply and thus the fixing element can be assembled and disassembled particularly simply and in a particularly time- and cost-effective manner.

[0023] It is preferably provided that the low-voltage conductor, also referred to as conductor for short, is held, in particular fixed, in particular directly, on the base body. It is also preferably provided that the base body has the receptacle, which is passed through by the low-voltage conductor, in particular along the passage direction and thus in the longitudinal extension direction of the low-voltage conductor. It is also conceivable, for example, that the base body has the connecting element opening, whereby the low-voltage conductor can be fixed securely, stably and particularly easily to the fixing element and via the fixing element to the housing element.

[0024] Another embodiment is characterized in that the base body and the fixed arm are designed to be integral with each other. This means that the base body and the fixed arm are formed by a single piece. This means that the base body and the fixed arm are not composed of parts that are formed separately and connected to each other, but that the base body and the fixed arm are formed by a single piece and are therefore formed by or are formed as a single body. In other words, for example, the base body and the fixed arm are formed by an integral and thus integrally manufactured integral body. This makes it particularly easy to handle and assemble the fixing element. For example, the corresponding pivot axis is formed by a local wall thickness reduction, so that, for example, in order to pivot the fixed arm relative to the base body, the fixing element, and thus the aforementioned integrally formed body, can be elastically deformed. In other words, if, in particular in the manner described, the fixed arm is pivoted relative to the base body, the preferably integrally formed fixing element is thereby elastically deformed. This ensures that the fixing element is particularly easy to assemble.

[0025] Finally, it has been shown to be particularly advantageous that the base body protrudes beyond the fixed arm on the side of the pivot axis in the corresponding extension direction. Thus, for example, a low-voltage line can be connected to the base body on the side of the pivot axis particularly simply and thus time- and cost-effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Further details of the present invention are obtained from the following description of preferred embodiments and the accompanying drawings. In the drawings:

[0027] Figure 1 A schematic perspective view showing a section of an electrical energy storage device for a motor vehicle;

[0028] Figure 2 A schematic perspective view showing a section of an electrical energy storage device;

[0029] Figure 3 Another schematic perspective view showing a section of an electrical energy accumulator;

[0030] Figure 4 A schematic and perspective sectional view showing a section of an electrical energy accumulator;

[0031] Figure 5 A schematic perspective view showing a first specific embodiment of a fastening element for an electrical energy accumulator;

[0032] Figure 6 A schematic perspective view showing a second embodiment of a fixing element;

[0033] Figure 7 A schematic perspective view showing a third embodiment of a fixing element;

[0034] Figure 8 a schematic perspective view showing a fourth embodiment of a fixing element; and

[0035] Fig. 9 A schematic perspective view shows a fifth specific embodiment of a fastening element. DETAILED DESCRIPTION

[0036] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0037] Figure 1 An electrical energy storage device 1 for a motor vehicle, also referred to as a vehicle for short, is shown in a schematic perspective view in part. This means that the motor vehicle has an electrical energy storage device 1 in its fully manufactured state. The electrical energy storage device 1 has at least one housing element 2 and a plurality of storage cells 3, which are also referred to as battery cells. Electrical energy can be stored, in particular electrochemically, with the aid of the storage cells 3, i.e. in the storage cells 3. The storage cells 3 are held at least indirectly, in particular directly, on the housing element 2. Figure 1 In the embodiment shown, the housing element 2 forms or delimits a receiving area 4, in which the storage units 3 are at least partially received. The storage units 3 are electrically connected to each other, and the storage units 3 form a high-voltage storage unit 5 (HVS). The high-voltage storage unit 5 is a high-voltage component, the voltage, especially the operating voltage or the rated voltage of which is preferably greater than 50 volts, especially greater than 60 volts, and quite preferably several hundred volts. In particular, when or during the full-load operation of the high-voltage storage unit 5, the high-voltage storage unit 5 provides a current with a maximum current intensity, that is, a current intensity that can be provided by the high-voltage storage unit 5 at maximum. For example, the current with the maximum current intensity is transmitted to the motor of the motor vehicle, so that the motor vehicle is operated in the motor mode and thus as a motor, and the motor vehicle is driven electrically, especially purely electrically, by means of the motor. This is especially done during the full-load operation of the motor.

[0038] The electrical energy storage device 1 further comprises an electronic monitoring module 6 which is designed to be separate from the housing element 2 and from the storage cell 3 and is arranged outside the storage cell 3, by means of which the storage cell 3 can be monitored or monitored. It can be seen that the storage cell 3 is arranged outside the monitoring module 6. For example, the monitoring module 6 is a component of a battery management system (BMS) or is used by the battery management system so that, for example, the battery management system can operate, in particular open-loop control or closed-loop control, the high-voltage storage device 5. For example, the monitoring module 6 determines at least one parameter, in particular at least one measured variable, wherein the parameter or measured variable characterizes or describes the state of the storage cell 3. For example, the parameter comprises the respective temperature of the storage cell 3 and / or the respective voltage and / or current intensity which can be provided by the respective storage cell 3, in particular the maximum voltage and / or current intensity which can be provided. For example, the monitoring module 6 monitors the storage cell 3 in such a way that the monitoring module compares a parameter, in particular at least one actual value of the parameter, with a target value, wherein the monitoring module 6 monitors the storage cell 3 as a function of the comparison of the actual value with the target value. Thus, for example, the monitoring module 6 determines the respective state of the storage cell 3. For example, the monitoring module 6 provides a signal, in particular an electrical signal, which describes or characterizes the state of the storage cell 3 determined by means of the monitoring module 6. For example, a battery management system (BMS) can receive the signal provided or can be provided by the monitoring module 6 and thus operate the high-voltage accumulator 5 according to the signal, i.e. according to the determined state of the storage cell 3, in particular open-loop control or closed-loop control.

[0039] In order to be able to mount the electrical energy storage device 1 particularly easily, the monitoring module 6 is now fastened to the housing element 2 by means of at least one fastening element 7, such as Figures 2 to 4 The monitoring module 6 is also referred to as CSC or CSC module (CSC—cell supervision circuit—battery monitoring circuit). Therefore, the fixing element 7 is also referred to as CSC fixing element, in particular CSC plug. Figure 2 and Figure 3 It can be seen particularly well that a low-voltage cable harness 8 is also held on the fastening element 7 and is thus held on the housing element 2 via the fastening element 7. The low-voltage cable harness 8 comprises a plurality of low-voltage conductors 9, whose respective current-carrying capacity is lower than the current-carrying capacity at least required for transmitting the aforementioned current with the maximum current intensity.

[0040] Figures 1 to 4 The diagram shows a first embodiment of the fastening element 7. The fastening element 7 is designed to be separate from the housing element 2, separate from the storage unit 3, separate from the monitoring module 6 and separate from the low-voltage line 9. In this case, the fastening element 7 is latched to the housing element 2, for example.

[0041] In a first embodiment, the fixing element 7 has two receptacles 10, in particular receptacles arranged next to one another. Figure 4 It can be seen that two first low-voltage wires among the low-voltage wires 9 form a first wiring harness 11, and two second low-voltage wires among the low-voltage wires 9 form a second wiring harness 12. The first low-voltage wires 9 and thus the first wiring harness 11 are at least partially arranged in a first accommodation portion among the accommodation portions 10, while the second low-voltage wires 9 and thus the second wiring harness 12 are at least partially arranged in a second accommodation portion 10. Figure 5 As can be seen in the figure, the corresponding receiving portion 10 is formed as a through hole, which is arranged along the Figure 5 The passing direction illustrated by the double arrow 13 in the figure is continuous. The passing direction (double arrow 13) coincides with the corresponding longitudinal extension direction of the corresponding low-voltage conductor 9, which passes through the corresponding receiving portion 10 along its corresponding longitudinal extension direction and thus along the passing direction. The corresponding receiving portion 10 is not approximately completely closed around the circumferential direction extending in a plane, which is perpendicular to the corresponding passing direction of the corresponding receiving portion 10 and thus perpendicular to the corresponding longitudinal extension direction of the corresponding low-voltage conductor 9, but is open at the corresponding position S, in particular at exactly one corresponding position, more precisely along the introduction direction extending in the corresponding plane. As a result, for example, the corresponding low-voltage conductor 9 can be moved relative to the fixing element 7 along the introduction direction and thus moved to, in particular inserted into, the corresponding receiving portion 10 at the corresponding position S, so that the corresponding low-voltage conductor 9 passes through the corresponding receiving portion 10 along its corresponding longitudinal extension direction. As a result, a particularly simple assembly can be achieved. Preferably, the fixing element 7 is formed from a particularly elastically deformable plastic, so that, for example, at least one region of the fixing element 7 having the respective receptacle 10 is elastically deformable, in particular when the respective low-voltage conductor 9 is moved into the respective receptacle 10. As a result, for example, the respective low-voltage conductor 9 can be clamped into the respective receptacle 10 particularly easily.

[0042] The fixing element 7 has a base body 14 and two fixing arms 15 and 16 which are opposite to each other, in particular in a viewing direction indicated diagrammatically by a double arrow 17. In this case, the base body 14 is arranged between the fixing arms 15 and 16 in the viewing direction. The viewing direction extends perpendicularly to the penetration direction (double arrow 13). The respective fixing arms 15, 16 are held on the base body 14 so as to be pivotable about a respective imaginary pivot axis SA relative to the base body 14, in this case such that the fixing arms 15 and 16 are formed integrally with each other and with the base body 14. It can be seen that the respective pivot axis SA extends parallel to the penetration direction (double arrow 13) and therefore perpendicularly to the viewing direction (double arrow 17). The respective fixing arms 15, 16 have respective fixing regions 18 which are arranged on the other side of the respective pivot axis SA in the respective extension direction, in particular the longitudinal extension direction, of the respective fixing arms 15, 16. The respective extension direction of the respective fixing arms 15, 16 is indicated diagrammatically by a double arrow 19 and extends both perpendicularly to the penetration direction (double arrow 13) and perpendicularly to the viewing direction (double arrow 17). Thus, for example, the respective extension direction of the respective fixing arms 15, 16 extends in the aforementioned plane extending perpendicularly to the penetration direction. In order to fix the fixing element 7 and the monitoring module 6 to the housing element 2, the respective fixing regions 18 of the respective fixing arms 15, 16 engage from behind corresponding, in particular solid, wall regions of the housing element 2 and / or the monitoring module 6. Figure 4 The corresponding wall area can be seen and marked with W.

[0043] Furthermore, the respective fixing arms 15, 16 have respective operating regions 20 arranged on the side of the respective pivot axis SA along the respective extension direction of the respective fixing arms 15, 16, to which respective forces can be applied, in particular by a person. In particular, forces can be applied to the operating regions 20 in such a way that they point towards each other and extend, in particular, in the plane extending perpendicularly to the respective pivot axis SA. As a result, the operating regions 20 are pivoted towards each other about the pivot axis SA relative to the base body 14, while the fixing regions 18 are pivoted away from each other about the pivot axis SA relative to the base body 14. As a result, for example, the fixing element 7 can be mounted on the housing element 2 and released, i.e. disassembled, from the housing element 2. Figure 5 It can be seen that the respective fastening region 18 forms or delimits a respective receptacle 21 , in which the respective wall region W can be arranged or is arranged.

[0044] Furthermore, in the first embodiment, it is provided that the base body 14 projects beyond the fixing arms 15 and 16 along the respective extension direction of the respective fixing arms 15, 16 on this side of the respective pivot axis SA and thus on one side SE, wherein the respective actuating region 20 and in this case also the respective receptacle 10 are arranged on the side SE of the respective pivot axis SA. It can be seen that the receptacle 10 is arranged at one end of the base body 14, in particular the free end E, wherein the free end E is arranged on the side SE. In particular, the fixing region 18 with the receptacle 21 is or forms a foot anchor for advantageously fixing the fixing element 7.

[0045] Figure 6 A second embodiment of the fixing element 7 is shown. In the second embodiment, the fixing element 7, in particular the base body 14 and quite in particular the side SE2 opposite the end E, has an insertion bevel 22 which can be particularly easily inserted into a corresponding hole, in particular designed as an insertion hole, of the housing element 2 and / or the monitoring module 6 in order to thereby connect the fixing element 7 to the housing element 2 and / or to the monitoring module 6, for example.

[0046] Figure 7 A third embodiment of the fixing element 7 is shown. In the third embodiment, the fixing arms 15 and 16 have a greater length along their respective extension direction than in the first and second embodiments. Figure 7 , a connecting element 23 is shown in dashed lines, which is designed to be separate from the fixing element 7 and from the corresponding low-voltage line 9. In particular, the connecting element 23 is a cable tie. The low-voltage line 9 is fixed to the fixing element 7, in particular to the base body 14, by means of the connecting element 23. Here, the base body 14 has a through hole 24, which is continuous, in particular along the viewing direction illustrated by the double arrow 17, and is penetrated by the connecting element 23.

[0047] In the third embodiment, the foot 25 of the respective fixing arm 15, 16, which delimits the respective receptacle 21 of the respective fixing arm 15, 16, in particular along the respective extension direction (double arrow 19) of the respective fixing arm 15, 16, is split, in particular in such a way that the respective foot 25 has two foot parts 26 spaced apart from one another along the penetration direction (double arrow 13). This makes it possible to achieve a particularly advantageous plug-in geometry.

[0048] Figure 8A fourth embodiment is shown. In the fourth embodiment, the operating region 20 is hollowed out, so that the respective operating region 20 has a respective, further through-hole 27. The respective through-hole 27 is continuous in the viewing direction (double arrow 17), so that, for example, the connecting element 23 can be passed through the corresponding through-hole 24 and the further through-hole 27 in the viewing direction (double arrow 17). This makes it possible to achieve an advantageously large length of the respective fixing arm 15, 16 extending in the respective extension direction and at the same time to achieve an advantageous fixing of the connecting element 23, in that the connecting element 23 can be inserted, in particular in the viewing direction (double arrow 17), not only through the through-hole 24 but also through the through-hole 27.

[0049] at last, Fig. 9 A fifth embodiment of the fixing element 7 is shown. The fixing arms 15 and 16, also referred to as lever arms, have recesses not only for the connecting element 23 (cable tie) but also for accommodating the corresponding low-voltage line 9. For this purpose, for example, the respective fixing arm 15, 16 has, in particular on its respective inner side facing the base body 14, a corresponding recess 28, also referred to as a recess, in which, for example, the connecting element 23 can be at least partially accommodated. Reference numerals list

[0050] 1Electric energy storage device

[0051] 2 Shell elements

[0052] 3 Storage unit

[0053] 4Accommodation area

[0054] 5 High-pressure accumulator

[0055] 6 Monitoring module

[0056] 7Fixing elements

[0057] 8Low voltage cable harness

[0058] 9 Low voltage wire

[0059] 10 Accommodation

[0060] 11. Wiring Harness

[0061] 12 Wire Harness

[0062] 13 Double Arrow

[0063] 14 Matrix

[0064] 15 Fixed arm

[0065] 16 Fixed arm

[0066] 17 Double Arrow

[0067] 18 Fixed Areas

[0068] 19 Double Arrow

[0069] 20 Operation Area

[0070] 21 Accommodation

[0071] 22 Import Bevel

[0072] 23 Connecting elements

[0073] 24 through holes

[0074] 25 feet

[0075] 26 Legs

[0076] 27 additional through holes

[0077] 28 recesses

[0078] E end

[0079] SA pivot axis

[0080] SE side

[0081] SE2 side

[0082] W wall area

Claims

1. An electrical energy storage device (1) for a motor vehicle, comprising a housing element (2); comprising storage units (3) held on the housing element (2) and configured to store electrical energy, the storage units being electrically connected to one another and thereby forming a high-voltage storage device (5) for storing electrical energy; and comprising at least one electronic monitoring module (6) configured to be separate from the housing element (2) and from the storage unit (2) for monitoring the storage unit (3), characterized in that: The monitoring module (6) is fixed to the housing element (2) by means of at least one fixing element (7), via which at least one low-voltage line (9) is also held on the housing element (2).

2. The electrical energy storage device (1) according to claim 1, characterized in that The fastening element (7) is designed to be separate from the housing element (2), separate from the storage unit (3), separate from the monitoring module (6) and separate from the low-voltage line (9).

3. The electrical energy accumulator (1) according to claim 1 or 2, characterized in that The fixing element (7) is locked with the housing element (2).

4. Electrical energy storage device (1) according to one of the preceding claims, characterized in that The fixing element (7) has a receptacle (10) in which a low-voltage line (9) is at least partially received.

5. Electrical energy storage device (1) according to one of the preceding claims, characterized in that A connecting element (23) is provided which is designed to be separate from the fixing element (7) and separate from the low-voltage line (9), by means of which the low-voltage line (9) is held on the fixing element (7).

6. The electrical energy accumulator (1) according to claim 5, characterized in that The connecting element (23) passes through a corresponding through hole (24) of the fixing element (7).

7. Electrical energy storage device (1) according to one of the preceding claims, characterized in that The fixing element (7) has a base body (14) and fixing arms (15, 16) opposite one another, which are each held on the base body (14) so ​​as to be pivotable relative to the base body (14) about a pivot axis (SA).

8. The electrical energy accumulator (1) according to claim 7, characterized in that The respective fixing arm (15) has a respective fixing area (18) arranged on the other side of the respective pivot axis (SA) along the respective extension direction (19) of the respective fixing arm (15, 16), the fixing area engaging from behind a respective wall area (W) of the housing element (2) and / or the monitoring module (6) in order to fix the fixing element (7) and the monitoring module (6) on the housing element (2), and the respective fixing arm has a respective operating area (20) arranged on the side of the respective pivot axis (SA) along the respective extension direction (19) of the respective fixing arm (15, 16), to which a respective force can be applied so as to pivot the respective fixing arm (15, 16) about the respective pivot axis (SA) relative to the base body (14) and thereby release the respective fixing arm (15, 16) from the housing element (2).

9. The electrical energy accumulator (1) according to claim 8, characterized in that The base body (14) and the fixing arms (15, 16) are formed integrally with each other.

10. Electrical energy accumulator (1) according to claim 8 or 9, characterized in that The base body (14) protrudes beyond the fixed arms (15, 16) on the side of the pivot axis (SA) along the corresponding extension direction (19).

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