Lifting device and method for handling a battery module, use of a lifting device and system consisting of a lifting device and battery module

Abstract

Lifting device (2) for handling a battery module (20), comprising a base body (4) and an L-shaped gripping hook (8) which is configured to engage in a receiving opening (24) of a housing of the battery module (20), characterized in that the base body (4) is pivotably mounted about a pivot axis (A) and comprises at least two rigid L-shaped gripping hooks (8), each having a first and a second leg (10, 12), wherein the first legs (10) of the L-shaped gripping hooks (8) are each rigidly connected to the base body (4) and the second legs (12) extend transversely to the pivot axis (A).

Description

[0001] The invention relates to a lifting device for handling a battery module, comprising a base body and an L-shaped gripping hook configured to engage in a receiving opening of a housing of the battery module. The invention further relates to the use of such a lifting device. The invention also relates to a system comprising a lifting device and a battery module, wherein the lifting device for handling the battery module comprises a base body and an L-shaped gripping hook configured to engage in a receiving opening of a housing of the battery module.Finally, the invention also relates to a method for handling a battery module of a traction battery of an industrial truck with a lifting device, wherein the lifting device comprises a base body and at least one L-shaped gripping hook which engages in a receiving opening of a housing of the battery module in order to couple the lifting device and the battery module.

[0002] Traction batteries, such as those used in industrial trucks, are often assembled from several battery modules. Each battery module comprises a multitude of individual cells, for example, prismatic or cylindrical cells. Depending on the number of individual cells combined in a battery module, it can be quite heavy. This makes it difficult to handle such a battery module without assistance, for example, during the installation of a traction battery.

[0003] Lifting devices for handling battery modules are known. For example, DE 10 2016 107 088 A1 discloses a battery module with a slot into which a movable leg of a lifting tool engages. Another lifting tool, suitable for gripping a component with a screw opening, is disclosed in DE 10 2015 011 859 A1.

[0004] It is an object of the invention to provide an improved lifting device and an improved method for handling a battery module, a use of a lifting device and an improved system comprising a lifting device and a battery module.

[0005] The problem is solved by a lifting device for handling a battery module, comprising a base body and an L-shaped gripping hook which is designed to engage in a receiving opening of a housing of the battery module, wherein this lifting device is further developed in that the base body is pivotably mounted about a pivot axis and comprises at least two rigid L-shaped gripping hooks, each having a first and a second leg, wherein the first legs of the L-shaped gripping hooks are each rigidly connected to the base body and the second legs extend transversely to the pivot axis.

[0006] The base body and the gripping hooks are rigidly connected. For example, the base body and the gripping hooks are manufactured as a single piece (one piece of material). The second legs of the gripping hooks extend, for example, at least approximately in a plane perpendicular to the pivot axis. The second legs extend, for example, in a radial direction originating from the pivot axis. It is also possible for the second legs to extend in a different direction within the aforementioned plane. If the base body is cylindrical, for example, the second legs of the gripping hooks, which are not connected to the base body, can be designed to extend partially or completely in a circumferential direction.According to one such embodiment, the second legs are, for example, elements curved in the circumferential direction of the base body, the outer edges of which follow a circular path having the same diameter as the cylindrical base body. In this embodiment, the gripping hooks lie completely within an area occupied by the base body, viewed in a projection along the pivot axis. Advantageously, such a lifting device is very compact. The receiving openings provided for the gripping hooks to engage in the housing of the battery module require very little installation space. Furthermore, the gripping hooks are located, for example, on an outer edge of the base body, so that their outer surfaces are flush with a lateral surface of the base body.

[0007] The lifting device has the advantage of being simple and robust in design and can be manufactured very efficiently. It has no moving parts and therefore offers high operational reliability and robustness.

[0008] According to a further embodiment, the lifting device is further developed in that the gripping hooks are connected to a flat side of the base body and, in particular, are arranged around the pivot axis at equal radial distances from the pivot axis. For example, all gripping hooks are located on one end face of the base body, provided it is cylindrical.

[0009] The lifting device includes, for example, a drive unit designed to pivot the base body around the pivot axis.

[0010] The lifting device includes, for example, three gripping hooks. These can be evenly distributed around the circumference, i.e., at 120° intervals around the pivot axis. This allows the base to be coupled to the battery module in three different positions. Depending on the number of gripping hooks, this is possible in a varying number of positions. Accordingly, the drive unit is configured, for example, to pivot the base by less than 180°. This would be the case for a lifting device with two gripping hooks. If the base includes, for example, three gripping hooks, the drive unit is configured to pivot the base by less than 120°.

[0011] According to a further embodiment, the lifting device is further developed by a centering body which is connected to the base body, wherein a central longitudinal axis of the centering body coincides with the pivot axis.

[0012] The centering body allows for quick and easy coupling of the lifting device to the battery module. The centering body ensures the correct alignment of the base unit with the battery module housing. For example, the centering body is spring-loaded along the central longitudinal axis of the base unit.

[0013] According to a further advantageous embodiment, the lifting device is further developed by a locking pin which, in the retracted state, is arranged within the base body and, in the extended state, extends out from a surface of the base body in which the gripping hooks are connected to the base body.

[0014] The locking pin, when retracted, is located, for example, predominantly within the base body. Furthermore, when retracted, the locking pin is completely within the base body. The locking pin securely interlocks the lifting device and the battery module against rotation.

[0015] The problem is further solved by using a lifting device according to one or more of the aforementioned embodiments for handling a battery module of a traction battery of an industrial truck, wherein a housing of the battery module comprises a top plate and an intermediate plate arranged on an outside of the top plate and mechanically coupled to the top plate, wherein at least two receiving openings are provided in the intermediate plate, and the L-shaped gripping hooks of the lifting device are provided to engage in these receiving openings.

[0016] According to one embodiment, the battery module comprises a housing and a plurality of prismatic individual cells arranged in this housing. The poles of the prismatic individual cells are all located in an upper region of the housing. The housing includes the cover plate, which is arranged directly adjacent to the poles of the individual cells. On the outer side of the cover plate, facing away from the poles of the individual cells, is the intermediate plate, which is mechanically coupled to the cover plate. Furthermore, the battery module includes, for example, a lid that forms a top surface of the housing. This lid is arranged on the side of the intermediate plate facing away from the cover plate.

[0017] The use of the lifting device for handling a battery module according to this embodiment is particularly advantageous because the lifting device, with its L-shaped gripping hooks, engages the intermediate plate. This plate can be designed so that the weight of the individual cells can be easily transferred to the lifting device via this intermediate plate. In particular, it is not necessary for the lid of the lifting device to be so robust as to perform the same function.

[0018] The problem is further solved by a system comprising a lifting device and a battery module, wherein the lifting device for handling the battery module comprises a base body and an L-shaped gripping hook configured to engage in a receiving opening of a housing of the battery module, wherein this system is further developed in that the housing of the battery module comprises a cover plate and an intermediate plate arranged on an outside of the cover plate and mechanically coupled to the cover plate, wherein the intermediate plate has at least two receiving openings, and wherein the base body of the lifting device is pivotably mounted about a pivot axis and the lifting device comprises at least two rigid L-shaped gripping hooks, each having a first and a second leg.wherein the first legs of the L-shaped gripping hooks are each rigidly connected to the base body and the second legs extend transversely to the pivot axis, wherein, when the lifting device and the battery module are coupled, the gripping hooks of the lifting device engage in the receiving openings of the intermediate plate.

[0019] According to one embodiment, the battery module included in the system is designed as in the embodiment mentioned above in the context of the use of the lifting device.

[0020] The system is very robust and reliable, as the lifting device has no moving parts and can also be easily and efficiently coupled with the battery module.

[0021] The cover, located on the side of the intermediate plate opposite the top plate and forming the upper side of the housing, preferably includes through-holes that, in the finished assembly state, are positioned to match the receiving openings in the intermediate plate. The through-holes are slightly larger than the receiving openings, but in any case sufficiently large to allow the gripping hooks to be guided through them into the receiving openings of the intermediate plate.

[0022] According to a further embodiment, the poles of the individual cells are mechanically connected to the intermediate plate and the cover plate. For this purpose, suitable fastening elements, such as screws, are screwed through the intermediate plate and the cover plate into the poles of the individual cells. The individual cells are thus suspended from the intermediate plate by their poles, which advantageously prevents pressure on the poles during transport.

[0023] The system is further developed in particular by the fact that the at least two receiving openings present in the intermediate plate of the battery module are arranged at the same radial distance around a central axis and the gripping hooks are connected to a flat side of the base body and are arranged at the same radial distance to the pivot axis around the pivot axis, wherein, when the lifting device and the battery module are coupled, the flat side of the base body faces the intermediate plate of the battery module and the central axis and the pivot axis coincide.

[0024] According to a further advantageous embodiment, the system is further developed in that the intermediate plate of the battery module comprises a centering opening whose center point lies on the central axis and the lifting device comprises a centering body connected to the base body, wherein a central longitudinal axis of the centering body coincides with the pivot axis and the centering body is located in the centering opening when the lifting device and the battery module are coupled.

[0025] Advantageously, in such a system, the lifting device can be coupled to the battery module by performing only three movements. First, the central longitudinal axis of the centering body or the base body and the central axis of the receiving opening are aligned so that they coincide.

[0026] Next, the lifting device is moved close to the battery module along these two now coaxial axes and then pivoted around the pivot axis, which is also coaxial with the central longitudinal axis and the central axis. With this final movement, the lifting device and the battery module are locked together. The lifting device can therefore be coupled to the battery module quickly and efficiently. The ability to quickly couple and uncouple is very advantageous for the production of, for example, a traction battery.

[0027] According to a further embodiment, the system is further developed in that the lifting device includes a locking pin which, in the retracted state, is arranged within the base body and, in the extended state, extends out of a surface of the base body in which the gripping hooks are connected to the base body, wherein, when the lifting device and the battery module are coupled, the locking pin, in the extended state, projects into a receiving opening of the intermediate plate and locks the lifting device and the battery module against rotation.

[0028] The locking pin effectively prevents the lifting device from accidentally decoupled from the battery module, even during rapid rotational movements where torques occur at the connection between the lifting device and the battery module due to the battery module's large mass and its inertia. This improves workplace safety and allows for increased speed at which the battery module can be handled using the lifting device.

[0029] The problem is further solved by a method for handling a battery module of a traction battery of a forklift truck with a lifting device, wherein the lifting device comprises a base body and at least one L-shaped gripping hook which, in order to couple the lifting device and the battery module, engages in a receiving opening of a housing of the battery module, wherein this method is further developed in that the lifting device comprises at least two rigid L-shaped gripping hooks, each with a first and a second leg, wherein the first legs of the L-shaped gripping hooks are each rigidly connected to the base body and the second legs extend transversely to a pivot axis, wherein, in order to couple the lifting device with the battery module, the base body of the lifting device is pivoted about the pivot axis so that the L-shaped gripping hooks engage in the receiving openings of the battery module.

[0030] The handling method offers the same or similar advantages as those already mentioned with regard to the lifting device for handling the battery module, its use, and the system comprising the lifting device and the battery module, so repetition is unnecessary.

[0031] The method is advantageously further developed in that the lifting device comprises a centering body connected to the base body, wherein a central longitudinal axis of the centering body coincides with the pivot axis, and wherein the housing of the battery module comprises a centering opening whose center point lies on a central axis, wherein, to couple the lifting device with the battery module, the lifting device is moved so that the pivot axis is aligned with the central axis, then the L-shaped gripping hooks are inserted into the receiving openings of the battery module, and then the base body of the lifting device is pivoted about the pivot axis.

[0032] Furthermore, the method is further developed in particular by the fact that the lifting device comprises a locking pin which, in the retracted state, is arranged within the base body and, in the extended state, extends out of a surface of the base body in which the gripping hooks are connected to the base body, wherein the lifting device and the battery module are locked against rotation by moving the locking pin from the retracted state to the extended state, and the locking pin engages together with a single gripping hook in one and the same receiving opening of the battery module.

[0033] Further features of the invention will become apparent from the description of embodiments according to the invention, together with the claims and the accompanying drawings. Embodiments according to the invention may fulfill individual features or a combination of several features.

[0034] The invention is described below, without limiting the general concept, with reference to exemplary embodiments and the drawings, whereby for all details of the invention not explained in detail in the text, explicit reference is made to the drawings. The drawings show: Fig. 1. A lifting device in a schematically simplified perspective view looking at its lower front face, on which three L-shaped gripping hooks are present. Fig. 2 another schematically simplified perspective view showing the transparently depicted lifting device in a coupled state on a battery module, Fig. 3 A schematically simplified top view of an intermediate plate of a battery module, which includes three receiving openings and a centering opening, Fig. 4 to Fig. 6 further schematically simplified perspective representations of different stages during a coupling process between the lifting device and the battery module and Fig. 7 to Fig. 10 further schematically simplified perspective drawings that explain the structure of a battery module.

[0035] In the drawings, identical or similar elements and / or parts are provided with the same reference numbers, so that a re-presentation is omitted.

[0036] Fig. Figure 1 shows a lifting device in a schematically simplified perspective view. 2 For handling a battery module. The lifting device 2 includes a basic body 4 , which is exemplified by a cylindrical base body 4 It is about. On a lower forehead 6 of the base body 4 are L-shaped gripping hooks 8a, 8b , 8c present. The lifting device, for example, features 2 three grappling hooks 8a , 8b , 8c on. Generally, the grappling hooks should 8a , 8b , 8c also with reference marks 8 The grappling hooks are described as follows: 8 are rigidly designed and each has a first leg 10a , 10b , 10c and a second thigh 12a , 12b , 12c up. The first thighs 10a , 10b , 10c should generally be accompanied by reference numerals 10 , the second thighs 12a , 12b , 12c generally with reference numerals 12 to be called. The first thighs 10 the grappling hook 8 are rigidly connected to the base body 4 connected. These are rigid L-shaped gripping hooks. 8 , accordingly, the second leg 12 the grappling hook8 rigid with the first thigh 10 connected. For example, the base body 4 and the grappling hooks 8 manufactured in one piece, for example milled from a single component. It is also intended that the rigid gripping hooks 8 firmly attached to the base body 4 are connected.

[0037] The second thighs 12 the grappling hook 8 extend in the circumferential direction of the base body 4 These are curved components whose outer edges each lie on a circle that has the same radius as the cylindrical base body. 4 The outer sides of the grappling hooks 8 align with a cylindrical surface of the base body 4 .

[0038] The grappling hooks 8 are symmetrical about a pivot axis A arranged around. Since these are, for example, three gripping hooks 8a , 8b , 8cThese are spaced 120° apart around the pivot axis. A arranged around. The second legs 12 the grappling hook 8 extend in a plane perpendicular to the pivot axis A is oriented. The lifting device 2 This includes, for example, a drive unit (not shown) designed to move the base body 4 around the pivot axis A to swivel or rotate. Such a swiveling movement is necessary to operate the lifting device. 2 to couple with a battery module; this will be explained in detail later. The gripping hooks 8 are equidistant from the pivot axis A arranged around them. Alternatively to a drive unit with which the base body 4 around the pivot axis A The lifting device, which can be swivelled around, includes 2 a mount with a swivel bearing, so that the base body 4or a related component manually around the pivot axis A It can be rotated or swiveled. This allows for manual locking of the lifting device. 2 with the battery module.

[0039] The lifting device 2 It also includes a centering body. 14 , which is connected to the base body 4 is connected. A central longitudinal axis of the centering body. 14 falls with the pivot axis A together. The centering body 14 In the illustrated embodiment, a cylindrical pin is used that is collinear with the pivot axis. A is arranged. To facilitate the insertion of the centering body. 14 To facilitate insertion into a corresponding centering opening, the centering body is used. 14 The centering body is provided with a circumferential chamfer between the end face and the outer surface. 14 Furthermore, it is designed, for example, to be spring-loaded, i.e., it is pivoted in the direction of the pivot axis. AIt is mounted in a sliding manner. This prevents damage to the battery unit should the centering body shift. 14 The corresponding centering opening should not be hit exactly during the coupling process.

[0040] The lifting device 2 It also includes a safety pin. 16 , which, in the retracted state, for example, is completely within the base body 4 is arranged and extends from the front face in the extended state shown. 6 of the base body 4 extends outwards. The locking pin 16 is equipped with a manual operating element 18 Adjustable. It is adjustable in a direction parallel to the pivot axis. A optionally on the front 6 of the base body 4 sunken or, as shown, from this front face 6 The safety pin was extended. 16 It serves as a rotationally fixed locking mechanism between the lifting device 2and the battery module. Its function is explained in detail below.

[0041] Fig. 2 shows another schematically simplified perspective view, in which the lifting device is shown transparently. 2 on a battery module 20 is mounted. The structure of the battery module 20 This will be explained in more detail later. Its intermediate plate is visible. 22 , which are part of the battery module housing 20 is, and in which there are receiving openings 24 are located in which the not-shown grappling hooks 8 the lifting device 2 intervene. The intermediate plate 22 It also includes a centering opening. 26 , into which the centering body 14 the lifting device 2 intervenes. The safety pin 16 reaches into one of the receiving openings 24 one. The one in the same intake opening. 24engaging (not shown) gripping hooks 8 lies with an inner side of the first leg (which lies in one direction of the second leg) 12 of the associated gripping hook) on a short side edge of the receiving opening 24 on. The safety pin 16 is located on the opposite short side edge of one and the same recording opening 24 on. This makes it possible to use the lifting device. 2 rotationally fixed relative to the intermediate plate 22 of the battery module 20 and thus in relation to the battery module 20 to lock as a whole. To unlock, the locking pin is used. 16 using the actuating element 18 in a direction parallel to the pivot axis A moved upwards, so that the in Fig. 2. bottom end of the locking pin 16 from the intake opening 24 emerges. Subsequently, it is possible to examine the basic body. 4the lifting device 2 by pivoting around the pivot axis A to unlock and by a movement parallel to the pivot axis A from the battery module 20 to separate.

[0042] Fig. Figure 3 shows a schematically simplified detailed view of the intermediate plate. 22 The intermediate plate 22 includes three intake openings 24a , 24b , 24c , which are also generally referred to by reference numerals 24 to be designated, and into which the associated grappling hooks 8a , 8b , 8c the lifting device 2 intervene. The intake openings 24 are, for example, formally complementary to the second legs 12 the associated grappling hook 8 designed so that it is possible to move along the pivot axis A the second thighs 12 the grappling hook 8 through the intake openings24 to guide it through. The centering body facilitates this process. 14 , which is from the center opening 26 is recorded.

[0043] The lifting device 2 For example, it is used to handle a battery module. 20 Used during the installation of a traction battery for a forklift truck. The battery module 20 and the lifting device 2 form a system which includes the lifting device 2 and the battery module 20 includes.

[0044] The Fig. 4, Fig. 5 and Fig. Figure 6 shows further schematically simplified perspective representations of such a system consisting of a lifting device. 2 and a battery module 20 , with different stages during a coupling process between the lifting device 2 and the battery module 20 shown.

[0045] In Fig. 4 shows how the lifting device 2 to the battery module 20 is led to this. First, a central longitudinal axis of the centering body is determined. 14 , which is connected to the pivot axis A coincides, in accordance with a central axis Z brought. The central axis Z runs centrally through the centering opening 26 and stands vertically on a surface of the battery module 20 The central axis Z stands perpendicularly on a surface of the intermediate plate 22 , in which the intake openings are located 24 are located. The in Fig. 4 battery modules shown 20 It also includes a partially transparent lid. 28 , which has access openings 30 is equipped so that the gripping hooks 8 the lifting device 2 through these access openings 30 and the lid 28through into the intake opening 24 the intermediate plate 22 can intervene.

[0046] Fig. Figure 5 shows, in a further schematically simplified perspective view, the system consisting of a lifting device. 2 and battery module 20 , wherein the lifting device 2 now approaching the battery module, so that the front 6 of the base body 4 on the top side of the lid 28 sets up the grappling hooks 8 now extend through the intake openings 24 the intermediate plate 22 through it. To the lifting device 2 opposite the battery module 20 To lock it, it is rotated around its pivot axis. A swung.

[0047] This situation is further illustrated by a simplified schematic perspective representation in Fig. 6. The only difference between Fig. 5 and Fig. 6 is that the lifting device 2 around the pivot axis A was swivelled. The lifting device 2 After the swiveling process, it is able to access the battery module 20 to lift. To lift the battery module 20 and the lifting device 2 To lock them together in a rotationally fixed manner, the previously described locking pin is used. 16 using the hand-operated element 18 driven downwards, so that it, together with one of the grappling hooks 8 into one and the same recording opening 24 intervenes. This situation is already related to Fig. 2 have been described.

[0048] In Fig. 7 and Fig. Figure 8 shows further schematically simplified perspective representations, based on which the structure of the battery module is shown. 20 will be explained. The battery module 20 comprises a plurality of prismatic single cells 32, of which, for the sake of clarity, only some are marked with reference symbols. The individual cells 32 are arranged in such a way that their poles 34 , of which, for the sake of clarity, only some are marked with reference symbols, all pointing in the same direction. The poles 34 the individual cells 32 They are all located in an upper area of ​​the battery module. 20 .

[0049] Fig. 7 shows the battery module 20 in a partially assembled state. On the side of the individual cells 32 are cell borders 36 present, of which only one is visible and which forms the side walls of the battery module 20 forms. The individual cells 32 including the lateral cell borders and one between the individual cells 32 The centrally located middle cell rims are arranged in a U-shaped housing, the bottom of which is in Fig. 7 is not visible and whose thighs are the side walls 38 form the housing. 38 The U-shaped housing each has an L-profile in its upper area, which serves to hold a cover plate.

[0050] Fig. Figure 8 shows the battery module in a schematically simplified perspective view. 20 with mounted cover plate 40 . On one of the Poles 34 the individual cells 32 far side of the cover plate 40 In a further assembly step, the Fig. 9 shows the intermediate plate 22 mounted. The intermediate plate 22 includes the intake openings 24 , into which the grappling hooks 8 the lifting device 2 intervene. Furthermore, the intermediate plate includes 22 the center opening 26 .

[0051] The intermediate plate 22 is achieved using connecting elements 42with the cover plate 40 and the individual cells 32 connected. As connecting elements 42 Screws are provided as an example. Fig. 10 shows the battery module 20 with attached intermediate plate 22 and the connecting elements intended for connection 42 According to the illustrated embodiment, the connecting elements 42 through in the intermediate plate 22 existing openings 24 through it. Also the cover plate 40 has corresponding openings 44 open, so that the connecting elements 42 directly into one in Poland 34 the individual cells 32 They can be screwed into the existing internal thread.

[0052] By the battery module 20 on the intermediate plate 22 , by the engagement of the grappling hooks 8 the lifting device 2 into the intake openings 24When lifted, it is possible to change the weight of the individual cells. 32 via the intermediate plate 22 directly by means of the lifting device 2 to absorb the essential weight of the battery module. 20 constituting individual cells 32 will be at their poles 34 raised. Thus, it is advantageous that, for example, the lid does not need to be raised. 28 and the U-shaped housing of the battery module 20 They must be designed to be so stable that they can support the weight of the individual cells. 32 of the battery module 20 This allows, among other things, tool-free assembly of the lid. 28 .

[0053] All features mentioned, including those discernible from the drawings alone as well as individual features disclosed in combination with other features, are considered essential to the invention, both individually and in combination. Inventory embodiments may be fulfilled by individual features or a combination of several features. Within the scope of the invention, features marked "in particular" or "preferably" are to be understood as optional features. Reference symbol list 2 Lifting device 4 basic shapes 6 Front 8, 8a, 8b, 8c Grab hook 10, 10a, 10b, 10c first leg 12, 12a, 12b, 12c second leg 14 centering bodies 16 Safety pin 18 Manual operating element 20 battery modules 22 Intermediate plate 24, 24a, 24b, 24c Intake openings 26 Centering opening 28 lids 30 Through opening 32 single cells 34 poles 36 cell border 38 side wall 40 Cover plate 42 Connecting element 44 openings A swivel axis Z central axis QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 102016107088 A1

[0003] DE 102015011859 A1

[0003]

Claims

[1] Lifting device (2) for handling a battery module (20), comprising a base body (4) and an L-shaped gripping hook (8) which is designed to engage in a receiving opening (24) of a housing of the battery module (20), characterized by , that the base body (4) is pivotably mounted about a pivot axis (A) and comprises at least two rigid L-shaped gripping hooks (8), each having a first and a second leg (10, 12), wherein the first legs (10) of the L-shaped gripping hooks (8) are rigidly connected to the base body (4) and the second legs (12) extend transversely to the pivot axis (A). [2] Lifting device (2) according to claim 1, characterized by , that the gripping hooks (8) are connected to the base body (4) on a flat side and are arranged around the pivot axis (A) at equal radial distances to the pivot axis (A). [3] Lifting device (2) according to claim 2, characterized bya centering body (14) which is connected to the base body (4), wherein a central longitudinal axis of the centering body (4) coincides with the pivot axis (A). [4] Lifting device (2) according to one of claims 1 to 3, characterized by a locking pin (16) which, in the retracted state, is arranged within the base body (4) and, in the extended state, extends out from a surface of the base body (4) in which the gripping hooks (8) are connected to the base body (4). [5] Use of a lifting device (2) according to one of claims 1 to 4 for handling a battery module (20) of a traction battery of a forklift truck, wherein a housing of the battery module (20) comprises a cover plate (40) and an intermediate plate (22) arranged on an outside of the cover plate (40) and mechanically coupled to the cover plate (40), wherein at least two receiving openings (24) are provided in the intermediate plate (22), and the L-shaped gripping hooks (8) of the lifting device (2) are provided to engage in these receiving openings (24). [6] System comprising a lifting device (2) and a battery module (20), wherein the lifting device (2) for handling the battery module (20) comprises a base body (4) and an L-shaped gripping hook (8) which is configured to engage in a receiving opening (24) of a housing of the battery module (20), characterized bythat the housing of the battery module (20) comprises a cover plate (40) and an intermediate plate (22) arranged on an outside of the cover plate (40) and mechanically coupled to the cover plate (40), wherein the intermediate plate (22) has at least two receiving openings (24), and wherein the base body (4) of the lifting device (2) is pivotably mounted about a pivot axis (A), and the lifting device (2) comprises at least two rigid L-shaped gripping hooks (8), each having a first and a second leg (10, 12), wherein the first legs (10) of the L-shaped gripping hooks (8) are each rigidly connected to the base body (4), and the second legs (12) extend transversely to the pivot axis (A), wherein, when the lifting device (2) and the battery module (20) are coupled, the gripping hooks (8) of the lifting device (2) engage in the receiving openings (24) of the Interlock intermediate plate (22). [7] System according to claim 6, characterized by, that the at least two receiving openings (24) present in the intermediate plate (22) of the battery module (20) are arranged at equal radial distances around a central axis (Z) and the gripping hooks (8) are connected to a flat side of the base body (4) and are arranged at equal radial distances around the pivot axis (A), wherein, when the lifting device (2) and the battery module (20) are coupled, the flat side of the base body (4) faces the intermediate plate (22) of the battery module (20) and the central axis (Z) and the pivot axis (A) coincide. [8] System according to claim 7, characterized by, that the intermediate plate (22) of the battery module (20) comprises a centering opening (26) whose center point lies on the central axis (Z) and the lifting device (2) comprises a centering body (14) connected to the base body (4), wherein a central longitudinal axis of the centering body (14) coincides with the pivot axis (A) and the centering body (14) is located in the centering opening (26) when the lifting device (2) and the battery module (20) are coupled. [9] System according to any one of claims 6 to 8, characterized by, that the lifting device (2) comprises a locking pin (16) which, in the retracted state, is arranged within the base body (4) and, in the extended state, extends out of a surface of the base body (4) in which the gripping hooks (8) are connected to the base body (4), wherein, when the lifting device (2) and the battery module (20) are coupled, the locking pin (16), in the extended state, projects into a receiving opening (24) of the intermediate plate (22) and locks the lifting device (2) and the battery module (20) against rotation. [10] Method for handling a battery module (20) of a traction battery of an industrial truck with a lifting device (2), wherein the lifting device (2) comprises a base body (4) and at least one L-shaped gripping hook (8) which engages in a receiving opening (24) of a housing of the battery module (20) in order to couple the lifting device (2) and the battery module (20), characterized by, that the lifting device (2) comprises at least two rigid L-shaped gripping hooks (8) each with a first and a second leg (10, 12), wherein the first legs (10) of the L-shaped gripping hooks (8) are each rigidly connected to the base body (4) and the second legs (12) extend transversely to a pivot axis (A), wherein, in order to couple the lifting device (2) with the battery module (20), the base body (4) of the lifting device (2) is pivoted about the pivot axis (A) so that the L-shaped gripping hooks (8) engage in the receiving openings (24) of the battery module (20). [11] Method according to claim 10, characterized by, that the lifting device (2) comprises a centering body (14) connected to the base body (4), wherein a central longitudinal axis of the centering body (14) coincides with the pivot axis (A) and wherein the housing of the battery module (20) comprises a centering opening (26) whose center point lies on a central axis (Z), wherein, in order to couple the lifting device (2) with the battery module (20), the lifting device (2) is moved such that the pivot axis (A) is aligned with the central axis (Z), then the L-shaped gripping hooks (8) are inserted into the receiving openings (24) of the battery module (20) and then the base body (4) of the lifting device (2) is pivoted about the pivot axis (A). [12] Method according to claim 11, characterized by, that the lifting device (2) comprises a locking pin (16) which, in the retracted state, is arranged within the base body (4) and, in the extended state, extends out of a surface of the base body (4) in which the gripping hooks (8) are connected to the base body (4), wherein the lifting device (2) and the battery module (20) are locked against rotation by moving the locking pin (16) from the retracted state to the extended state, and the locking pin (16) engages, together with a single gripping hook (8), in one and the same receiving opening (24) of the battery module (20).

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