Battery device and electrical appliance

Abstract

The invention relates to a battery device (12) comprising a battery container (38) for receiving at least one rechargeable battery cell (22), wherein the battery container has a receiving space (40) for receiving the at least one battery cell (22), wherein the battery container (38) has a first container pole connection region (42) and a second container pole connection region (44), wherein the battery container (38) has a first battery pole opening (46) and a second battery pole opening (48) which fluidically connect surroundings (50) of the battery container (38) to the receiving space (40), wherein the first battery pole opening (46) is arranged or formed at the first container pole connection region (42) and the second battery pole opening (48) is arranged or formed at the second container pole connection region (44), wherein the battery device (12) does not comprise any active electrical or electronic components, and wherein the battery container (38) is designed such that it must be irreversibly destroyed in order to remove the at least one rechargeable battery (22). The invention further relates to an electrical appliance (10) comprising at least one electrical load (20) and at least one such battery device (12).

Description

[0001] Battery device and electrical device

[0002] The present invention relates to a battery device comprising a battery container for accommodating at least one rechargeable battery cell, wherein the battery container has a receiving space for accommodating the at least one battery cell.

[0003] Furthermore, the present invention relates to an electrical device comprising at least one electrical consumer and at least one battery device, wherein the at least one battery device comprises a battery container and at least one rechargeable battery cell accommodated in the battery container for supplying the at least one electrical consumer with electrical energy.

[0004] Electrical devices whose electrical loads are powered by electrical energy stored in batteries are known in numerous forms. They are used primarily as household and garden appliances, as well as power tools. Such electrical devices typically use rechargeable battery cells to supply power. These are permanently installed in conventional electrical devices, meaning they cannot be replaced by the user.

[0005] Replacing batteries in electrical devices is an established process, especially for primary batteries, i.e., batteries that are not rechargeable. However, due to legal requirements regarding the sustainability of electrical devices, battery replacement is also becoming increasingly important for rechargeable battery cells, especially lithium-ion batteries.

[0006] One problem, particularly with rechargeable lithium-ion cells, is their specific design, which poses the risk of short circuits between their two poles, i.e., the positive and negative poles of such a cell. In particular, electrical insulation on battery cells is often very thin and can therefore be easily mechanically damaged. If the insulation is damaged, for example, by an electrically conductive tool such as a screwdriver, this can lead to unwanted short circuits in the battery cell, resulting in spontaneous combustion and, as a result, fires. Therefore, it would be desirable to make the replacement of rechargeable battery cells, so-called secondary batteries, safer.

[0007] WO 2018 / 233812 A1 describes a holding device for an energy storage device, an electrical energy storage device, and an electrical device. DE 20 2020 106 057 U1 discloses a battery cell holding device and a battery pack. A fastening device for an electrochemical storage cell is disclosed in DE 43 23 274 A1. US Pat. No. 4,265,984 relates to a battery housing.

[0008] It is therefore an object of the present invention to improve a battery device and an electrical device of the type described above, in particular in such a way that replacement of rechargeable battery cells in electrical devices is possible safely and easily.

[0009] This object is achieved according to the invention in a battery device of the type described at the outset in that the battery container has a first container pole connection region and a second container pole connection region, that the battery container has a first battery pole opening and a second battery pole opening which fluidly connect an environment of the battery container and the receiving space, and that the first battery pole opening is arranged or formed on the first battery pole connection region and wherein the second battery pole opening is arranged or formed on the second container pole connection region. Such a battery device makes it possible, in particular, to accommodate one or more rechargeable battery cells in the receiving space of the battery container and thus to protect them from external influences. Poles of the battery cell or cells are accessible through the first and second battery pole openings.In particular, the battery container can be designed such that only the battery terminals of the battery cell are freely or essentially freely accessible. Such a configuration can ensure, particularly with appropriate design of the battery container, that the battery device in an electrical device is protected against polarity reversal and is installed securely. In particular, the battery device in an electrical device can be safely replaced, for example, by positively fitting it into a corresponding battery device receptacle of the electrical device. In particular, it can be ensured that only a battery device intended for the respective electrical device can be inserted into the battery device receptacle of the electrical device.In order to relieve the load on electrical contacts of the battery device and a battery cell accommodated therein, additional geometric elements can be formed on the battery container, for example ribs or dome-like projections. With such geometric elements, the battery device can, for example, be received in a form-fitting manner in the battery device receptacle of the electrical device and, in particular, can be locked therein. The design of the battery container, in particular of the battery pole openings, also makes it possible, in particular, to lead a pole contact of a battery cell accommodated in the battery container partially out of the battery container, i.e., in particular, such that the cell protrudes slightly from the battery container. Such a design also increases, in particular, the reliability of the battery device in an electrical device against polarity reversal and installation safety.

[0010] It is advantageous if the first container pole connection area and the second container pole connection area have different shapes. In particular, they can be geometrically shaped so that only a single possible installation orientation of the battery device in a battery device receptacle on an electrical device is possible. In this way, the installation and polarity reversal security of the battery device on the electrical device can be significantly improved. Battery devices can then be replaced by a user, and in particular by laypersons, without there being a risk of damage to either the battery device or the electrical device due to polarity reversal. Such a shape of the battery device makes replacement and, in particular, insertion of the battery device into a battery device receptacle of the electrical device intuitive for the user, even without instructions.

[0011] Preferably, the first container terminal connection area is designed for positive or substantially positive engagement with a second container terminal connection area of ​​another battery container. Such a configuration makes it possible, in particular, to connect two more battery devices in series, i.e., for example, to insert them arranged one behind the other in a correspondingly configured battery device receptacle of an electrical device. Here, too, the special configuration, namely the different shapes of the first and second container terminal connection areas, makes it possible to avoid reverse polarity when using the battery device. This effectively prevents, in particular, damage to battery devices and electrical devices.

[0012] Advantageously, the first container terminal connection area is designed in the form of a connection projection. It can then engage, in particular, into a recess provided for it in the battery device receptacle or can also be brought into positive or substantially positive engagement with a correspondingly designed second container terminal connection area of ​​another battery device.

[0013] It is advantageous if the connection projection tapers away from the receiving space and has an outer surface that corresponds or substantially corresponds to the outer surface of a truncated cone. Such a configuration makes it possible, in particular, to form a rotationally symmetrical battery device that, however, has two differently shaped container terminal connection areas. In particular, an axial position of the battery device in a battery device receptacle of an electrical device can be predetermined. However, a rotational position can be freely selected due to the rotational symmetry.

[0014] It is advantageous if the second container connection area is designed in the form of a connection recess. For example, a first container pole connection area, which is designed in the form of a connection projection, can engage in such a connection recess when two battery devices are engaged with one another in order to be connected in series. However, such a connection recess also allows a corresponding projection, for example in the form of a contact element or comprising one, which can in particular also be designed to be movable, to engage in it when the battery device is inserted as intended in the battery device receptacle of the electrical device in an operating position of the electrical device. In this way, in particular, reliable electrical contact can be established between the battery device and the electrical device.In addition, such a connection projection on the battery device receptacle can also serve to position the battery device in the battery device receptacle in a defined manner.

[0015] Preferably, the connection recess widens away from the receiving space and is delimited by a recess surface corresponding to the inner circumferential surface of a truncated cone. Such a conically shaped connection recess can be used, in particular, to accommodate a connection contact that is correspondingly shaped and formed on the battery device receptacle of the electrical device. However, it can also accommodate a correspondingly shaped connection projection of another battery device in order to arrange and connect two or more battery devices in series, as already explained. The connection projection and the connection recess are preferably designed to correspond to one another.As already noted, a connection projection of a first battery device and a connection recess of a second battery device can be brought into engagement in a form-fitting or substantially form-fitting manner in order to arrange two battery devices in series one behind the other.

[0016] According to a further preferred embodiment, it can be provided that the battery container forms a housing for the at least one battery cell and that the first container terminal connection region and the second container terminal connection region are directly and permanently connected to one another, or that the first container terminal connection region and the second container terminal connection region are formed integrally, in particular monolithically. Such a configuration of the battery container can, in particular, ensure that the at least one battery cell cannot be removed from the housing when the battery device is used as intended. Rather, the housing must then be destroyed, for example by severing the connection between the container terminal connection regions, which is not intended to be detachable, or by opening the battery container in such a way, namely by destruction, that the at least one battery cell can be removed.The housing is preferably made of an electrically non-conductive material, in particular an electrically insulating material. For example, it can be formed from a plastic, in particular a thermoplastic, by injection molding.

[0017] It is advantageous if the battery container defines a longitudinal container axis and has a shape that deviates from rotational symmetry with respect to the longitudinal container axis. This configuration makes it possible, in particular, to insert the battery container into a battery device receptacle of an electrical device in a defined manner, specifically in a defined rotational position with respect to the longitudinal container axis. Furthermore, it is also possible to utilize the deviating rotational symmetry to insert the battery container in a defined manner in the axial direction, i.e., parallel to the longitudinal container axis, into a battery device receptacle of an electrical device.

[0018] It is advantageous if at least one first securing element of a securing device is arranged or formed on the battery container, which securing device comprises at least one second securing element, if the at least one first securing element is in force-locking and / or form-locking engagement in a securing position with the correspondingly formed second securing element which is formed on an electrical device for the energy supply of which the battery device serves, wherein the at least one second securing element is arranged or formed on the electrical device on or in the region of a battery device receptacle which is designed to receive, in particular for the clearly defined reception, of the at least one battery device in an operating position of the electrical device.Such a configuration of the battery device makes it possible, in particular, to insert the battery device into a battery device receptacle of an electrical device in a defined manner. The interaction with at least one second securing element, which is arranged or formed on the electrical device, can also optionally be used to ensure that the correct battery device intended for the electrical device is always inserted into its battery device receptacle. Thus, the securing device, in particular the at least one first securing element, can also serve as a coding device for the battery device in interaction with an electrical device.

[0019] Conveniently, the at least one first securing element extends in a direction transverse to, in particular perpendicular to, a longitudinal axis of the battery container. This configuration makes it possible, in particular, to position the battery container in an axially defined position in the battery device receptacle of the electrical device. The at least one first securing element can thus form stops that interact, in particular, with the battery device receptacle and act in the axial direction. Preferably, the at least one first securing element is arranged or configured to surround the longitudinal axis of the container. Such a configuration can be implemented in a simple manner, for example in the form of an annular groove or an annular flange protruding from the battery container.

[0020] It is advantageous if the at least one first securing element is designed in the form of a securing projection or a securing recess. It can then be force- and / or positively engaged with a correspondingly designed second securing element on the electrical device, in particular with a recess corresponding to the securing projection or a projection corresponding to the securing recess.

[0021] According to a further preferred embodiment, at least one ventilation opening can be arranged or formed on the battery container, which fluidically connects the receiving space and the surroundings of the battery device. Such a ventilation opening makes it possible, in particular, to dissipate heat generated by a battery cell during operation of the battery device through convection. Furthermore, a gas-emitting battery cell can thus also be protected from explosion.

[0022] It is advantageous if the battery container is designed at least in two parts, in particular exactly in two parts, and comprises at least a first housing part and at least one second housing part, in particular only a first housing part and only a second housing part. The multi-part, in particular two-part, design of the battery container enables simple assembly of the battery device. In particular, at least one battery cell can thus be easily inserted into the receiving space, and this space can be closed by connecting the housing parts.

[0023] It is advantageous if the at least one first housing part and the at least one second housing part are connected to one another in a force-fitting and / or form-fitting and / or material-fitting manner, in particular glued and / or welded, in particular in the operating position. The battery container can in particular be provided for assembly with separate housing parts. Only after the at least one battery cell has been inserted into the receiving space is the housing closed by the housing parts being connected to one another in a force-fitting and / or form-fitting and / or material-fitting manner. In particular, a latching or snap-in connection device can be provided for this purpose in order to realize a force-fitting and / or form-fitting connection of the housing parts. Optionally or alternatively, the housing parts can also be connected to one another purely in a material-fitting manner, for example by gluing or welding.This means that at least one battery cell can be safely and securely housed in the housing.

[0024] It is advantageous if the at least one first housing part comprises the first container terminal connection area, and if the at least one second housing part comprises the second container terminal connection area. This configuration makes it possible, in particular, to design the housing parts in the form of sleeve-shaped housing parts that can be pushed over different terminal ends of a battery cell to accommodate the same into the receiving space. In particular, the container terminal connection areas can thus be arranged or formed on different housing parts.

[0025] It is advantageous if the at least one first housing part completely encloses the first container terminal connection area and if the at least one second housing part completely encloses the second container terminal connection area. This configuration has the particular advantage that the housing parts with their container terminal connection areas can completely surround the respective terminal of a battery cell, so that access to the battery terminals is only possible through the respective battery terminal opening. The battery terminal opening is in particular delimited or defined by only one of the housing parts. It is advantageous if the at least one first housing part and the at least one second housing part are sleeve-shaped and comprise at least one self-contained sleeve section surrounding the container longitudinal axis.Such a design makes it possible, in particular, for the housing parts of elongated, cylindrical battery cells to be pushed over the battery cells starting from the end faces. The housing parts can thus be designed in a cap-like manner, so that, particularly in the case of round cells, the poles of the battery cells can be pushed into the sleeve-shaped housing parts, with one of the battery cell poles being inserted into each sleeve-shaped housing part.

[0026] For assembly of the battery device, it is advantageous if the sleeve-shaped housing parts are designed such that one housing part can be inserted into the other. This makes it possible, in particular, to insert one or more battery cells into the sleeve-shaped housing parts and then connect the housing parts to one another, particularly in a force-locking and / or positive-locking manner, by sliding them into one another. For example, a clamping or press fit can be formed between the two interacting housing parts.

[0027] According to an alternative embodiment, it can be provided that the at least one first housing part partially encompasses or forms the first container terminal connection region and that the at least one second housing part partially encompasses or forms the second container terminal connection region. Such a configuration makes it possible, in particular, to design the housing parts such that the at least one battery cell can be inserted into the housing parts in a direction transverse to, in particular perpendicular to, the container's longitudinal axis. For example, the housing parts can be designed in the form of two half-shells. These can then each partially form, in particular, the first and second container terminal connection regions, such that the battery terminal opening is only fully formed when the two or more housing parts engage with one another to jointly form the container terminal connection regions.For the assembly of the battery device, it is advantageous if the at least one first housing part and the at least one second housing part are partially shell-shaped, in particular half-shell-shaped, and delimit the receiving space only over part of its circumference relative to the container's longitudinal axis. With sleeve-shaped housing parts, it is only possible to insert a battery cell into a housing part parallel to the container's longitudinal axis. In contrast, with a partially shell-shaped design of the housing parts, it is possible to insert the at least one battery cell into the housing parts transversely, in particular perpendicularly, to the container's longitudinal axis. With this configuration, too, the receiving space can be closed by connecting the housing parts to one another.

[0028] For simple and cost-effective assembly of the battery device, it is advantageous if the at least one first housing part and the at least one second housing part are clamped together. This eliminates the need for an optional, integrally bonded connection between the housing parts.

[0029] For the assembly of the battery device, it is further advantageous if the battery container comprises a coupling device for coupling the at least one first housing part and the at least one second housing part in a coupling position. This allows the housing parts to be connected to one another in a defined manner. In particular, the coupling device can be designed to provide a user, in particular an installer of the battery device, with acoustic and / or haptic feedback when the two or more housing parts are engaged with one another in a defined manner.

[0030] The coupling device can be designed simply and cost-effectively in the form of a latching and / or snap-in connection device. In addition, the battery device can thus be easily assembled. It is advantageous if the coupling device comprises first and second coupling elements which are arranged or formed on the one hand on at least one first housing part and on the other hand on at least one second housing part, and if the first and second coupling elements are non-positively and / or positively engaged in the coupling position and are disengaged in an assembled position. The battery device can thus be assembled in a simple manner by, after inserting the at least one battery cell into the receiving space of the battery container, bringing the first and second coupling elements, which are initially still disengaged, into engagement with one another in a non-positively and / or positively locking manner.In particular, a clamping connection can be formed between the housing parts or a locking or snap connection.

[0031] The coupling device can be formed in a simple manner if the first and second coupling elements are designed in the form of coupling projections and coupling recesses that correspond to one another.

[0032] Furthermore, it is advantageous if the battery container is designed to accommodate exactly one rechargeable battery or two or more rechargeable batteries. Thus, the battery container can be designed to accommodate a defined number of battery cells.

[0033] According to a further preferred embodiment of the invention, it can be provided that the battery device comprises at least one rechargeable battery cell that is accommodated in the battery container. In this way, a battery device can be formed that comprises at least one rechargeable battery cell, i.e. a so-called secondary battery, in a defined and protected manner. Regardless of how mechanically sensitive the at least one battery cell is, it can thus be accommodated in the battery container in a protected manner. In particular, it can thus be handled safely by a user. Furthermore, with a corresponding design of the battery container, it can also be ensured that the battery device can be engaged with an electrical device without danger of reverse polarity.

[0034] It is advantageous if the at least one battery cell has a first battery terminal and a second battery terminal, and if the first battery terminal is accessible through the first battery terminal opening and if the second battery terminal is accessible through the second battery terminal opening. This configuration makes it possible, in particular, to contact the battery terminals of the at least one battery cell of the battery device in a defined manner, for example, with corresponding connection contacts arranged or formed in or on a battery device receptacle of an electrical device.

[0035] Furthermore, it is advantageous if the battery device does not comprise any active electrical or electronic components, in particular no control and / or regulating device for controlling and / or regulating the charging and discharging of the at least one battery cell. Such a configuration simplifies the structure of the battery device overall. It can be designed simply and cost-effectively. Furthermore, there is no need for complex separation of components upon disposal. If designed without active electrical or electronic components, the battery device serves merely as a simple secondary battery. In this case, the battery container exclusively has a protective and handling function for the at least one battery cell accommodated in the battery container.

[0036] It is advantageous if the battery device comprises a passive electrical safety element which is operatively connected in an electrically conductive manner to a battery terminal of the battery cell, in particular to its positive terminal. Such a passive electrical safety element makes it possible, in particular, to prevent excessive current draw from the at least one battery cell. In particular, the risk of spontaneous combustion of the battery device can be reduced, since a maximum current that can be drawn from the at least one battery cell can be limited by the passive electrical safety element. In particular, excessive heating of the at least one battery cell and thus of the battery device during operation can be prevented.

[0037] The passive electrical safety element is preferably designed in the form of a passive current-limiting element, in particular in the form of a fuse. Such a safety element can be designed simply and cost-effectively. In particular, it can limit a discharge current from the at least one battery cell in a defined and effective manner.

[0038] Furthermore, it is advantageous if the battery device comprises at least one electrically conductive contact element that is operatively connected to a battery terminal of the battery cell. This allows for a defined contacting of the battery device, regardless of the configuration of the at least one battery cell.

[0039] It is advantageous if the passive electrical safety element is arranged or formed between the electrically conductive contact element and one of the two battery terminals. This configuration makes it possible, in particular, to always realize a defined contact element and thus a defined connection contact of the battery device, regardless of the shape of the safety element.

[0040] It is advantageous if the electrically conductive contact element comprises a contact section and a retaining section and if the contact section is arranged or formed in the region of the first or second battery pole opening, in particular passing through said opening. Such a configuration makes it possible, in particular, to arrange the at least one electrically conductive contact element securely on the battery device, thus preventing it from being accidentally detached from the battery container. The retaining section in particular serves this purpose. The contact section can, in particular, be designed such that it protrudes from the battery container. For example, one of the battery poles can be designed to protrude from the battery container by means of the contact section. The other battery pole can be set back into the battery container. This simplifies a polarity-protected connection of the battery device to an electrical device.

[0041] Advantageously, an inner diameter of the first or second battery terminal opening corresponds or substantially corresponds to the outer diameter of the contact section. Thus, in particular, the contact section can positively penetrate or engage the first or second battery terminal opening. In particular, the battery device can thus be sealed in the region of the battery terminals despite the provision of the electrically conductive contact element.

[0042] It is advantageous if the retaining section forms an end of the electrically conductive contact element facing the first or second battery terminal and has an outer diameter that is larger than the outer diameter of the contact section. Thus, with an appropriately dimensioned container terminal opening, the contact element can be securely held in the receiving space of the battery container. Slipping through the container terminal opening is then impossible.

[0043] Preferably, a retaining flange protruding radially relative to the container's longitudinal axis is formed on the retaining section. In particular, it can be designed in the form of an annular flange. This prevents the contact element from passing through the battery terminal opening.

[0044] A particularly simple and compact design of the battery device can be realized if the passive electrical safety element is directly electrically connected to the retaining section. In particular, the number of elements of the battery device accommodated in the receiving space can be minimized to a maximum of three, namely at least one battery cell, one passive electrical safety element, and one contact element.

[0045] For example, so that one of the two battery terminals of the battery device can be identified by a user in a standardized manner, it is advantageous if the electrically conductive contact element is arranged or configured to protrude from the battery container through the first or second battery terminal opening. Thus, in particular, the positive or negative terminal can be identified by the contact element protruding from the first or second battery terminal opening. In particular, the contact section of the contact element can protrude here.

[0046] The battery device can be designed simply and cost-effectively if the at least one battery cell is in the form of a round cell. Thus, the battery device can, in particular, also be designed to be substantially rotationally symmetrical or even completely rotationally symmetrical.

[0047] For assembly of the battery device, it is advantageous if the at least one battery cell is rotationally symmetrical. In particular, it can be cylindrical. During assembly, therefore, it is not necessary to pay attention to the rotational position in which the battery cell is aligned relative to a container's longitudinal axis in order to engage with one or more housing parts of the battery container.

[0048] Preferably, the at least one battery cell is in the form of a lithium-ion cell. Such battery cells have the particular advantage that they can be charged and discharged without a memory effect. Of course, other types of rechargeable battery cells can also be used to form a battery device.

[0049] According to a further preferred embodiment, the battery container can be designed such that it must be irreversibly destroyed to remove the at least one rechargeable battery. This configuration can, in particular, ensure that the at least one battery cell cannot inadvertently escape from the receiving space of the battery device. If the battery cell has been removed from the battery container, it is obvious and easily verifiable that this was not done as intended, but by destroying the battery container.

[0050] It may be advantageous if the battery device includes a temperature sensor. Such a temperature sensor, which also does not constitute an active electrical or electronic component, can be used to monitor the temperature of at least one battery cell as needed.

[0051] For temperature monitoring of the battery device, it is advantageous if the temperature sensor has two sensor connection contacts and if two sensor contacts accessible from the outside of the battery container are each electrically connected to one of the two sensor connection contacts. Thus, the temperature sensor and the design of the sensor connection contacts allow the temperature of the battery device to be determined easily and reliably.

[0052] The object set out at the outset is further achieved according to the invention in an electrical device of the type described at the outset in that the at least one battery device is designed in the form of one of the advantageous embodiments of battery devices described above.

[0053] The electrical device then has the advantages already described above in connection with preferred embodiments of battery devices.

[0054] Advantageously, the at least one electrical load is designed in the form of a heating device or an electric motor. The electrical device can thus be used, in particular, to drive and move tool elements or to heat media, for example, cleaning fluids. It is advantageous if the electrical device comprises a battery device receptacle for accommodating the at least one battery device. Such a battery device receptacle makes it possible, in particular, to arrange the at least one battery device in a defined manner on the electrical device in order to supply it with electrical energy.

[0055] Furthermore, it is advantageous if the electrical device comprises a securing device for mechanically securing the battery device in the battery device receptacle in an operating position of the electrical device. This can, in particular, prevent the at least one battery device from being undesirably removed from the electrical device. Regardless of how the electrical device is moved, the at least one battery device cannot fall out of the battery device receptacle.

[0056] The at least one battery device can be secured in the battery device receptacle in a simple manner if the securing device is designed for the defined axial positioning and / or axial securing of the at least one battery device in the battery device receptacle in the operating position of the electrical device against movement in a direction parallel or substantially parallel to a longitudinal axis of the battery container. In particular, relative movement between the at least one battery device and the electrical device in the operating position can thus be prevented. In particular, the at least one battery device can thus be held immobile in the battery device receptacle.

[0057] The securing device can be formed in a simple manner if it comprises first and second securing elements which are arranged or formed on the one hand on the battery device and on the other hand on the electrical device, and if the first and second securing elements are in force-locking and / or positive engagement in a securing position of the securing device and are disengaged in a separating position in which the at least one battery device is removed from the battery device receptacle.

[0058] For handling the electrical device and the at least one battery device, it is advantageous if the at least one battery device comprises the at least one first securing element and if the electrical device comprises the at least one second securing element. Thus, the securing elements of the securing device can also be used, in particular, for coding the electrical device and the battery device. In this way, it can be ensured, for example, that only the battery device actually intended for it can be inserted into a battery device receptacle of an electrical device.

[0059] The securing device can be designed particularly easily if the at least one second securing element is designed in the form of a securing projection or a securing recess. It can then be brought into force- and / or form-locking engagement in the securing position with a corresponding first securing element, which can be designed, for example, as a recess or projection.

[0060] It is advantageous if the at least one second securing element is designed in the form of a securing projection, which, in the operating position, engages in a corresponding securing recess on the battery device. Such a configuration makes it possible, in particular, to secure the battery device against movement in the axial direction, i.e., in particular parallel to a container longitudinal axis of the battery device, and / or in a direction transverse, in particular perpendicular, thereto in the container device receptacle.

[0061] Preferably, the at least one second securing element is integrally formed on the battery device receptacle. In particular, it can be formed integrally with the battery device receptacle. This simplifies handling of the electrical device and the at least one battery device for a user.

[0062] Furthermore, it may be advantageous if the at least one second securing element is designed to be detachably connectable to the battery device receptacle. For example, it can be arranged or formed on a closure element, in particular a cover, that closes the battery device receptacle in the operating position. If the battery device is inserted into the battery device receptacle and the closure element is connected to the electrical device to close the battery device receptacle, the second securing element is then automatically engaged with the first securing element on the battery device in a defined manner.

[0063] The securing device can be implemented simply and cost-effectively if the at least one second securing element is designed in the form of a retaining bracket or a retaining plate. Such securing elements can be arranged or formed, in particular, on closure elements of the battery device receptacle.

[0064] According to a further preferred embodiment, it can be provided that first and second connection contact elements are arranged or formed on the battery device receptacle, which, in the operating position, are each electrically connected to one of the two battery poles. This allows the electrical device or its electrical loads to be supplied, particularly simply and safely, with electrical energy stored in the at least one battery device.

[0065] It is advantageous if at least one of the terminal contact elements is movably arranged on the battery device receptacle for engaging and disengaging with one of the two battery terminal connection areas of the battery device. In particular, one of the terminal contact elements can also be used to secure the battery device in the battery device receptacle against movement transverse to a container longitudinal axis of the battery device. For example, the battery device can be locked in the battery device receptacle by engaging with the movable terminal contact element.

[0066] Preferably, the movable terminal contact element has a shape that is geometrically similar to one of the two battery terminal connection areas. This allows, in particular, a connection between the movable terminal contact element and one of the two battery terminal connection areas to be achieved in the operating position.

[0067] It is advantageous if the movable connection contact element is configured to correspond to the second battery terminal connection area of ​​the battery device and engages therewith in a force-fitting and / or positive-locking manner in the operating position. In particular, it can be configured to be brought into electrical connection with a negative terminal of the battery device.

[0068] Furthermore, it is advantageous if the movable connecting contact element protrudes into the battery device receptacle in the operating position and releases the battery device receptacle in an inserted position in which the battery device can be inserted into the battery device receptacle. Thus, the movable connecting contact element can be used to virtually lock the at least one battery device in the battery device receptacle of the electrical device in the operating position. Removal of the at least one battery device is then only possible when the movable connecting contact element is transferred from the operating position to the inserted position.

[0069] Preferably, the movable terminal contact element can be moved from the operating position into the inserted position against the action of a prestressing element. In this way, it can be achieved, in particular, that the movable terminal contact element assumes the operating position as its home position. Furthermore, the prestressing element can be designed such that it holds the movable terminal contact element in the operating position under prestress against the at least one battery device.

[0070] The electrical device can be designed in a simple manner if the prestressing element is in the form of a spring element. The spring element can be designed, for example, in the form of a spiral spring or a leaf spring.

[0071] In order to be able to reliably secure the at least one battery device in the battery device receptacle of the electrical device, it is advantageous if the movable connection contact element assumes the operating position in a basic position.

[0072] The electrical device is preferably designed as a gardening or household appliance, or as a power tool. This list of possible configurations of the electrical device is, of course, not exhaustive. In principle, it is conceivable to supply any type of electrical device with electrical energy using one or more battery devices in the form of the advantageous embodiments of battery devices described above.

[0073] The following description of a preferred embodiment of the invention serves to explain it in more detail in conjunction with the drawings. They show:

[0074] Figure 1: a schematic partial sectional view of a first embodiment of a battery device;

[0075] Figure 2: a perspective schematic overall view of a first embodiment of an electrical device; Figure 3: a view similar to Figure 1 of another embodiment of a battery device;

[0076] Figure 4: a perspective schematic overall view of another embodiment of an electrical device;

[0077] Figure 5: a view similar to Figure 1 of a further embodiment of a battery device;

[0078] Figure 6: a perspective schematic overall view of another embodiment of an electrical device;

[0079] Figure 7: a schematic exploded view of a part of an electrical device with a battery device;

[0080] Figure 8: a view similar to Figure 8 with the battery device mounted before insertion into a battery device receptacle of an electrical device;

[0081] Figure 9: a perspective view of a battery device inserted into a battery device receptacle of an electrical device;

[0082] Figure 10: a sectional view along line 10-10 in Figure 11;

[0083] Figure 11: a sectional view along line 11-11 in Figure 10;

[0084] Figure 12: a sectional view of an electrical device in the region of a battery device receptacle with two inserted battery devices;

[0085] Figure 13: a view similar to Figure 12 of another embodiment of an electrical device; Figure 14: a sectional view similar to Figure 11 of another embodiment of an electrical device;

[0086] Figure 15: a view similar to Figure 9 of a further embodiment of an electrical device; and

[0087] Figure 16: a sectional view taken along line 16-16 in Figure 15.

[0088] Figures 2, 4 and 6 show three exemplary embodiments of electrical devices together with a schematically illustrated exemplary embodiment of a battery device 12.

[0089] The electrical device 10 shown as an example in Figure 2 is designed as a window cleaning device 14. Another example of a window cleaning device 16 is the electrical device 10 shown as an example in Figure 10. The electrical device 10 shown as an example in Figure 6 is designed as a floor cleaning device 18.

[0090] Figures 1, 3 and 5 show exemplary embodiments of purely schematically illustrated electrical devices 10 as well as exemplary embodiments of schematically illustrated battery devices 12.

[0091] The electrical devices 10 schematically illustrated in Figures 1 to 6 comprise one or more electrical loads 20 and one or more battery devices 12. The battery devices 12 are designed to supply the electrical loads 12 with electrical energy that can be stored in one or more rechargeable battery cells 22. The electrical devices 10 can thus be operated, in particular, independently of the mains.

[0092] Depending on the design of the electrical device 10, the electrical load 20 can be designed, in particular, in the form of a heating device 24 or an electric motor 26. The electrical device 10 comprises a battery device receptacle 28 for accommodating one or more battery devices 12. The number of battery devices 12 that can be accommodated depends on the energy requirements of the electrical device 10.

[0093] The electrical devices 10 according to the embodiments of Figures 2, 4 and 6 are household appliances 30 in the form of cleaning devices 32. The electrical device 10 can alternatively also be designed in the form of a gardening tool 34 as shown schematically in Figure 1 or in the form of a power tool 36 as shown schematically in Figure 3.

[0094] Figure 1 schematically illustrates an embodiment of a battery device 12. This comprises a battery container 38 for accommodating a rechargeable battery cell 22. The battery container 38 defines a receiving space 40 for accommodating the battery cell 22. The battery container 38 has a first container terminal connection area 42 and a second container terminal connection area 44.

[0095] Furthermore, the battery container 38 has a first battery terminal opening 46 and a second battery terminal opening 48. The battery terminal openings 46 and 48 fluidly connect the receiving space 40 and an environment 50 of the battery container 38.

[0096] The first battery terminal opening 46 is arranged or formed on the first container terminal connection area 42. The second battery terminal opening 48 is arranged or formed on the second container terminal connection area 44.

[0097] The first container terminal connection area 42 and the second container terminal connection area 44 have different shapes. The first container terminal connection area 42 is designed in the form of a connection projection 52. The connection projection 52 tapers away from the receiving space 40 and has an outer surface 54 that corresponds or substantially corresponds to the outer surface of a truncated cone.

[0098] Figure 3 schematically shows a further embodiment of a battery device 12. The battery container 38 is designed similarly to the battery container 38 in the embodiment of Figure 1, in particular in the region of the first container pole connection region 42. However, it is longer and thus designed to accommodate two battery cells 22 arranged one behind the other.

[0099] The exemplary embodiment of the battery device 12 according to Figure 5 comprises a receiving space 40 in which two battery cells 22 can be arranged side by side. An electrically conductive connecting element 56 serves to electrically connect a first battery terminal 58 of one battery cell 22 to a second battery terminal 60 of a second battery cell 22.

[0100] The battery container 38 is designed such that the first and second container terminal connection regions 42 and 44 are not arranged or formed at ends of the battery container 38 pointing away from one another, as is the case in the embodiments of Figures 1 and 3, but on the same side of the battery container 38. In both the embodiment of Figure 5 and the embodiment of Figure 3, the first battery terminal connection region 42 is designed in the form of a connection projection 52.

[0101] It goes without saying that the battery device receptacles 12 of the electrical devices 10 are each designed to correspond to the battery device(s) 12 provided for the respective electrical device 10.

[0102] Figures 7 to 11 show a further embodiment of a battery device 12 in conjunction with a schematically illustrated part or section of an electrical device 10. The section of the electrical device 10 serves merely to visualize and represent the battery device receptacle 28 encompassed by the electrical device 10.

[0103] The embodiment of the battery device 12 according to Figures 7 to 11 comprises a battery container 38, which forms a housing 62 for a rechargeable battery cell 22.

[0104] The battery cell 22 is designed in the form of a round cell 64. It is rotationally symmetrical, namely cylindrical, as clearly visible in Figure 7. The battery cell 22 has an outer insulation layer 66, which is interrupted in the region of the first battery terminal 58 and the second battery terminal 60. The battery terminals 58 and 60 are formed on the end faces of the battery cell 22. The battery terminals 58 and 60 point in opposite directions and are designed to point in the direction of the longitudinal cell axis 68 of the battery cell 22.

[0105] The battery container 38 defines a container longitudinal axis 70. It has a shape that deviates from rotational symmetry with respect to the container longitudinal axis 70.

[0106] The battery container 38 is constructed in two parts and comprises a first housing part 72 and a second housing part 74. In an operating position, as illustrated by way of example in Figures 8 to 11, the first housing part 72 and the second housing part 74 are connected to one another in a force-fitting and / or form-fitting and / or material-fitting manner. In particular, the two housing parts 72 and 74 can be glued and / or welded together.

[0107] The battery container 38 is made of an electrically non-conductive material. For example, this can be a plastic, in particular an injection-molded thermoplastic. The two housing parts 72 and 74 are partially shell-shaped, namely half-shell-shaped, as clearly visible in Figure 7. They delimit the receiving space 40 only over a portion of its circumference relative to the container's longitudinal axis 70. The two housing parts 72 and 74 each delimit the receiving space 40 over 180°, thus half the circumference of the receiving space 40.

[0108] A coupling device 76 of the battery container 38 serves to connect the two housing parts 72 and 74 in a coupling position shown schematically in Figures 8 to 11. The coupling device 76 is designed in the form of a locking and / or snap-in connection device 78.

[0109] The coupling device 76 comprises first coupling elements 80 and second coupling elements 82. A total of four first and four second coupling elements 80, 82 are provided. Four first coupling elements 80 are formed on the first housing part 72. Four second coupling elements 82 are formed on the second housing part 74. The first and second coupling elements 80 and 82 are engaged in a force-locking and / or positive-locking manner in the coupling position. In an assembly position shown schematically in Figure 7, they are disengaged.

[0110] The first coupling elements 80 are designed in the form of coupling projections 84, and the second coupling elements 82 are designed in the form of coupling recesses 86. The coupling projections 84 and the coupling recesses 86 are arranged and configured to correspond to one another, so that they can lock together in the coupled position. Two first coupling elements 80 are arranged in pairs opposite one another. Two pairs of coupling projections 84 are arranged or configured axially offset from one another in the direction of the container's longitudinal axis 70. Accordingly, the coupling recesses 86 are also arranged or configured in pairs on the second housing part 74 and offset from one another in the axial direction. The coupling projections are delimited by a sliding surface 88 and a retaining surface 90.The retaining surfaces 90 of the paired coupling projections 84 form a common retaining plane. The coupling recess 86 has a locking surface 92 against which the retaining surface 90 rests in the coupling position. When the two housing parts 72 and 74 are brought into engagement with one another, the sliding surfaces 88 slide against housing edges 94 on the second housing part 74, so that the coupling projections 84 are deformed slightly outwardly away from the container's longitudinal axis. If the housing parts 72 and 74 are moved further toward one another, the coupling projections 84 can engage in the correspondingly designed coupling recesses 86, whereby spring-elastic connecting webs 96, which connect the coupling projections to the first housing part 72, can then spring back into their basic position shown in Figures 7 to 11.

[0111] The housing parts 72 and 74 are now connected to one another in a locking manner, as described. This connection can only be released by destroying at least one of the coupling elements 80 and 82 of the coupling device 76. Thus, the battery container 38 is designed such that it must be irreversibly destroyed to remove the at least one rechargeable battery 22.

[0112] The battery cell 22 is received in the receiving space in a form-fitting manner. The first container terminal connection region 42 and the second container terminal connection region 44 are also shaped differently. The first container terminal connection region 42 is particularly designed for form-fitting or substantially form-fitting engagement with a second container terminal connection region 44 of a further battery container 38. The first container terminal connection region 42 is designed in the form of the connection projection 52, which tapers away from the receiving space 42 and has a conical outer surface 54. The second container terminal connection region 44 is designed in the form of a connection recess 98. The connection recess 98 widens away from the receiving space 40 and delimits a recess surface 100, which corresponds to the inner circumferential surface of a truncated cone. The connection projection 52 and the connection recess 98 are designed to correspond to one another.

[0113] In this exemplary embodiment, the two container terminal connection regions 42 and 44 are directly and permanently connected to one another. In alternative exemplary embodiments, the two container terminal connection regions 42 and 44 are formed integrally. For example, they can also be formed monolithically, particularly when the battery container 38 is formed by overmolding a battery cell 22.

[0114] In the embodiment of Figures 7 to 11, the first housing part 72 and the second housing part 74 each partially encompass or partially form the first container pole connection region 42 and the second container pole connection region 44.

[0115] The first container terminal opening 46 is formed in the form of a circular opening in the housing 62 and extends through an end wall 102 extending transversely to the container longitudinal axis 70. The second battery terminal opening 48 extends through an end wall 104 opposite the end wall 102. An outer diameter of the end wall 102 is smaller than an inner diameter of the end wall 104. The outer surface 54 is inclined relative to the container longitudinal axis 70 by the same angle of inclination as the recess surface 100 is relative to the container longitudinal axis 70.

[0116] The battery terminal openings 46 and 48 are each partially formed on the two housing parts 72 and 74.

[0117] In the area of ​​the connection projection 52, four ventilation openings 106 are arranged or formed around a circumference relative to the container's longitudinal axis 70. They fluidly connect the receiving space 40 and the surrounding area 50 of the battery device 12. The battery cell 22 rests against the end wall 104 with its end encompassing the second battery terminal 60. Coaxially to the container's longitudinal axis 70, a passive electrical safety element, optionally encompassed by the battery device 12, extends from the first battery terminal 58 toward the first container terminal opening 46. Thus, it is operatively connected in an electrically conductive manner to the first battery terminal 58, which is a positive terminal of the battery cell 22.

[0118] The safety element 108 is designed in the form of a passive current limiting element 110. In the exemplary embodiment illustrated in the figures, the safety element 108 is designed in the form of a fuse 112. This serves to limit the current drawn from the rechargeable battery cell 22 in order to prevent its overheating and the associated ignition.

[0119] The battery device 12 further comprises an electrically conductive contact element 114, which is operatively connected in an electrically conductive manner to the first battery terminal 58 of the battery cell 22. In the illustrated embodiment, the securing member 108 is arranged or formed between the contact element 114 and the first battery terminal 58.

[0120] The contact element 114 comprises a contact section 116 and a retaining section 118. The contact section 116 is arranged in the region of the first battery terminal opening 46 and extends through it. An inner diameter of the first battery terminal opening 46 is adapted to an outer diameter of the contact section 116 and corresponds or substantially corresponds thereto. An end face 120 of the contact section 116 thus protrudes slightly from the housing 62 of the battery container 38.

[0121] In a corresponding manner, the second battery terminal 60 of the battery cell 22 is set back in the direction of the receiving space 40 relative to an end face 122 of the end wall 104 facing away from the receiving space 40. The end face 120, however, projects beyond an end face 124 of the end wall 102 facing away from the receiving space 40, specifically by exactly as much as the second battery terminal 60 is set back relative to the end face 122. In this way, it is possible for the end face 120 of a first battery cell 22 to touch the second battery terminal 60 of a second battery cell 22 when the first container terminal connection region 42 of the first battery cell 22 engages the second container terminal connection region 44 of the first battery device 12.

[0122] The retaining portion 118 forms an end of the electrically conductive contact element 114 facing the first battery terminal 58. An outer diameter of the retaining portion 118 is larger than an outer diameter of the contact portion 116.

[0123] A retaining flange 126, in the form of an annular flange 128, is formed on the retaining section 118 and projects radially relative to the container's longitudinal axis 70. The passive electrical securing element 108 is directly electrically connected to the retaining section 118. Thus, a current can flow from the first battery terminal 58 through the securing element 108 to the retaining section 118 of the electrically conductive contact element 114.

[0124] Figures 10 and 11 show the rechargeable battery cell 22 accommodated in the battery container 38. As explained, the battery terminals 58 and 60 are accessible through the battery terminal openings 46 and 48.

[0125] The battery device 12 is further configured such that it does not comprise any active electrical or electronic components. In particular, it does not comprise any control and / or regulating device for controlling and / or regulating the charging and discharging of the at least one battery cell 22. This is realized either via corresponding devices on the electrical device 10 or via a corresponding charger (not shown in the figures) for charging the battery cell 22 of the battery device 12. The battery container 38 serves, in particular, to ensure safe handling of the battery cell 22 accommodated in the receiving space 40. The special design of the first and second container terminal connection regions 42 and 44 makes it possible, in particular, to ensure protection against reverse polarity. This means that the battery device can only be inserted into the battery device receptacle 28 of the electrical device 10 in a defined orientation.Such reverse polarity protection cannot be achieved solely by the rechargeable battery cell 22, which, as shown schematically in Figures 7 and 11, is essentially cylindrical and completely rotationally symmetrical.

[0126] Thus, the special design of the battery device 12, in particular of the battery container 38, ensures safe handling of the battery cell 12 for a user. In particular, battery cells 22 in the form of lithium-ion cells are typically designed such that their battery poles 58 and 60 are geometrically virtually indistinguishable to a layperson. Therefore, there is a risk that a layperson, i.e., a non-expert, could insert the battery cells 22 the wrong way round into a battery device receptacle 28 of the electrical device 10 when replacing them for use with an electrical device 10. This can lead to damage to electronic components of the electrical device 10. This is avoided by the special design of the battery device 12.

[0127] First and second connection contact elements 130 and 132 are arranged or formed on the battery device receptacle 28. In the operating position of the electrical device 10, as schematically illustrated in Figure 11, these are each electrically connected to one of the two battery poles 58 and 60. The first and second connection contact elements 130 and 132 are electrically connected to the load 20 in a manner known to those skilled in the art, in order to supply the electrical energy stored in the battery cell 22 to the load 20. The second connection contact element 132 is arranged or formed on a contact projection 134, which is designed to correspond to the connection recess 98 of the battery device 12.The battery device 12 can therefore only be inserted into the battery device receptacle 28 in such a way that the second battery pole 60 can enter into electrical connection with the second connection contact element 132 and the first battery pole 58 can enter into electrical connection with the first connection contact element 130 via the securing member 108 and the contact element 114. This protection against reverse polarity is additionally supported by a geometric shape of the battery device receptacle 28. An end region thereof adjacent to the first connection contact element 130 tapers in its inner diameter and forms an inclined wall surface 136 which runs parallel to the outer surface 54. This prevents the battery device 12 from being inserted into the battery device receptacle 28 with its end encompassing the connection recess 98 in such a way that the second battery pole 60 is opposite the first connection contact element 130.

[0128] The electrical device 10 further comprises a securing device 138 for mechanically securing the battery device 12 in the battery device receptacle 28 in the operating position of the electrical device 10.

[0129] The securing device 138 is designed for the defined axial positioning or axial securing of the battery device 12 in the battery device receptacle 28 in the operating position of the electrical device 10, specifically against movement in a direction parallel or substantially parallel to the longitudinal axis of the battery container 38.

[0130] The securing device 138 comprises first and second securing elements 140 and 142, which are arranged or formed on the one hand on the battery device 12 and on the other hand on the electrical device 10. The securing elements 140 and 142 are engaged in a force-locking and / or form-locking manner in a securing position of the securing device 138. The securing position is schematically illustrated in Figures 10 and 11. A disconnected position, in which the battery device 12 is removed from the battery device receptacle 28, is schematically illustrated in Figures 7 and 8. In the disconnected position, the securing elements 140 and 142 are disengaged.

[0131] In the embodiment illustrated in Figures 7 to 11, the battery device 12 comprises a first securing element 140, and the electrical device 10 comprises two second securing elements 142. The two second securing elements 140 are designed as securing projections 144. In the operating position, the securing projection 144 engages in a corresponding securing recess 146 on the battery device 12.

[0132] The second securing element 142 is molded onto the battery device receptacle 28 or formed integrally therewith. Furthermore, a second securing element 142 is detachably connectable to the battery device receptacle 28. As clearly shown schematically in Figure 8, it is designed in the form of a retaining bracket or a retaining plate 148, which is attached to a closure element 150 in the form of a cover 152 for closing the battery device receptacle 28. The two second securing elements 142 form mutually parallel contact surfaces for the housing 62 and, in a closed position of the battery device receptacle, which is schematically illustrated in Figure 10, clamp the battery device 12 in a defined axial position in the battery device receptacle 28.

[0133] In the embodiment shown schematically in Figures 7 to 11, two connecting elements 154 in the form of screws 156 are used to connect the closure element 150 to the electrical device 10, which can be screwed into corresponding recesses 158 provided with an internal thread on the electrical device 10 adjacent to the battery device receptacle 28.

[0134] Another embodiment of an electrical device 10 is schematically illustrated in Figure 12. The battery device receptacle 28 is configured here to accommodate two battery devices 12, as explained in detail in connection with the embodiment of Figures 7 to 11. The battery device receptacle 28 is thus longer; a distance between the connection contact elements 130 and 132 corresponds to twice the distance between the end face 120 and the second battery pole 60.

[0135] The two battery devices 12 are inserted into the battery device receptacle 12 in such a way that the first container terminal connection area 42 of one battery device 12 comes into operative connection with the first connection contact element 130, and the second battery terminal connection area 44 of this battery device 12 comes into operative connection with the first battery terminal connection area 42 of the second battery device 12. Its container terminal connection area 44, in turn, positively receives the contact projection 134 on the battery device receptacle 28, so that the second battery terminal 60 of the second battery device 12 can come into operative electrical connection with the second connection contact element 132 of the battery device receptacle 28. In the manner described and schematically illustrated in Figure 12, the two battery devices 12 can thus be connected in series.

[0136] There is only one way to insert the two battery devices 12 into the battery device receptacle 28, namely in the manner described. In this way, the battery devices 12, whose battery cells 22 have battery terminals 58 and 60 that are not geometrically differently shaped, can be inserted into the battery device receptacle 28 for operating the electrical device 10 in a manner that is safe from polarity reversal.

[0137] Figure 13 shows a further embodiment of an electrical device 10 with a battery device receptacle 28 into which two identical battery devices 12 can be inserted. These are designed like the battery devices 12 described above in connection with the embodiments of Figures 7 to 11 and 12, respectively. In this embodiment, too, the battery device receptacle 28 can be closed with a closure element 150 by means of four screws 156. The battery devices 12 are held clamped in the operating position, thus in the securing position of the securing device 138, by the closure element 150 in cooperation with second securing elements 142 in the form of securing projections 144 on the battery device receptacle 28.

[0138] The battery device receptacle 28 in the embodiment of Figure 13 differs from the battery device receptacles of the embodiments of Figures 7 to 11 and 12 by the design of the second connection contact element 132. In the embodiment of Figure 13, this is movably arranged on the battery device receptacle 28 for engaging and disengaging with a second container terminal connection area 44 of one of the two battery devices 12.

[0139] The terminal contact element 132 is surrounded by the contact projection 134 and immovably coupled thereto. The contact projection 134 with the second terminal contact element 132 has an overall shape that is geometrically similar to the second battery terminal connection area 44. This enables the contact projection 134 with the second terminal contact element 132 to engage the battery device 12 in a force-fitting and / or form-fitting manner in the operating position. The operating position is schematically illustrated in Figure 13.

[0140] In the operating position, the movable second terminal contact element 132 projects into the battery device receptacle 28. In an insertion position, in which the battery devices 12 can be inserted into the battery device receptacle 120, the contact projection 134 with the second terminal contact element 132 releases the battery device receptacle 28. The contact projection 134 with the movable second terminal contact element 132 can be moved from the operating position into the insertion position against the action of a prestressing element 160. In Figure 13, an arrow 162 indicates the direction of movement in which the terminal contact element 132 can be moved in order to be transferred from the operating position into the insertion position.

[0141] The prestressing element 160 is designed in the form of a spring element 164. In Figure 13, the spring element 164 is shown, by way of example, in the form of a coil spring. This spring is compressed upon movement of the terminal contact element 132 to disengage it from the battery device 12. It relaxes upon engagement with the second container terminal connection area 44 during the transition from the inserted position to the operating position.

[0142] The movable contact projection 134 with the second connection contact element 132 arranged thereon can of course also be arranged on a battery device receptacle 28 that is designed to accommodate only one battery device 12. For example, this can be realized accordingly in an embodiment of Figures 7 to 11.

[0143] In a basic position, the movable connection contact element 132 assumes the operating position. This ensures that the second connection contact element 132 is reliably in electrically conductive contact with the second battery terminal 60 of a battery device 12 in the operating position.

[0144] Figure 14 shows a further embodiment of an electrical device 10. It comprises a battery device receptacle 28 into which a single battery device 12 can be inserted.

[0145] In this embodiment, too, the same reference numerals are used to identify identical or functionally similar components as in the embodiments described above in connection with Figures 1 to 13.

[0146] The battery device 12 of the embodiment illustrated in Figure 14 comprises a housing 62, which is formed in two parts and includes first and second housing parts 72 and 74. In this embodiment, the two housing parts 72 and 74 are sleeve-shaped and include a self-contained sleeve section 166 surrounding the container's longitudinal axis 70. In this embodiment, the two housing parts 72 and 74 are not connected to one another. They each surround only end regions of the battery cell 22 in the region of its battery terminals 58 and 60.

[0147] The first housing part 72 forms a first container terminal connection region 42, which corresponds in its structure to the first container terminal connection region 42 of the above-described embodiments of battery devices 12.

[0148] The second housing part 74 defines a second container terminal connection area 44, which corresponds in structure to the container terminal connection areas 44 of the above-described embodiments of battery devices 12. Circular end surfaces 168 and 170 of the sleeve sections 166 of the two housing parts 72 and 74 face toward each other and are spaced apart from each other. This is clearly visible in Figure 14.

[0149] The securing device 138 is designed similarly to the exemplary embodiment in Figures 7 to 11. The holding plate 148 is dimensioned such that it can come into contact with both housing parts 72 and 74. Two securing projections 144 are formed on the container device receptacle 28, each of which is also in contact with one of the two housing parts 72 and 74 in the operating position. The closure element 150, which is secured to the electrical device 10 in the operating position by two connecting elements 154 in the form of screws 156, serves to close the battery device receptacle 28. The contact projection 134 and the second connection contact element 132 are designed analogously to the exemplary embodiment in Figures 7 to 11. A first connection contact element 130 rests against the first connection contact element 130 in the operating position, as shown schematically in Figure 14.

[0150] The sleeve sections 166 are dimensioned such that the battery cell 22 can be clamped and received therein in a press fit. Thus, the housing parts 72 and 74 can only be removed from the battery cell 22 by destroying the battery device 12, namely the battery cell 22 enclosed therein or the housing parts 72 and 74.

[0151] Figures 15 and 16 schematically illustrate a further embodiment of an electrical device 10 with a battery device receptacle 28, into which a battery device 12 can be inserted in a manner that protects against polarity reversal. The electrical device 10 and, in particular, the battery device receptacle 28 correspond in their construction to the embodiment of the electrical device 10 of Figures 7 to 11 with its battery device receptacle 28, so that reference can be made to the above description in this regard.

[0152] The battery device 12, on the other hand, bears a certain resemblance to the exemplary embodiment of the battery device 12 in Figure 14. Here, too, the two housing parts 72 and 74 are sleeve-shaped and each define a sleeve section 166 surrounding the container's longitudinal axis 70. However, in this exemplary embodiment, the two housing parts 72 and 74 are in direct contact with one another. They are designed such that the housing part 74 can be partially inserted into the housing part 72. To enable this, the outer diameter of the second housing part 74, starting from the end face 170 in the direction of the end wall 104, is slightly reduced compared to a region of the sleeve section 166 starting from the end wall 104. Furthermore, an inner diameter of the first housing part 72 is reduced starting from the end face 168, specifically such that a thin sleeve wall section 172 remains.This allows the second housing part 74 to be inserted, with the end face 170 first, into the first housing part 72 past the end face 168. In this embodiment, the end face 170 is then positioned closer to the first container terminal connection area 42 than the end face 168. This is a difference compared to the embodiment of Figure 14.

[0153] The two housing parts 72 and 74 are clamped together in the manner described.

[0154] Instead of the fixed contact projection 134, this can also be designed to be movable, as in the embodiment of Figure 13.

[0155] In this exemplary embodiment of the electrical device 10, the securing device 138 with first and second securing elements 140 and 142, which are arranged or formed on the one hand on the battery device receptacle 28 and on the other hand on the battery device 12, also serves for defined axial positioning.

[0156] In the embodiments of Figures 14 to 16, the first housing part 72 comprises the first container pole connection area 42 and the second housing part 74 comprises the second container pole connection area 44, in each case completely.

[0157] In the embodiment of Figures 15 and 16, the first securing element 140 is formed in a direction transverse, in particular perpendicular, to the longitudinal axis 70 of the battery container. It surrounds the longitudinal axis 70 and is designed in the form of a securing recess 146. This is realized in the form of a circumferential annular groove into which the securing projections 144 on the battery device receptacle 28 can optionally engage and thus secure the battery device 12 against movement in the axial direction in the battery device receptacle 28. Optionally, the battery device 12 can comprise a temperature sensor 174. Such a temperature sensor 174 is schematically illustrated on the battery device 12 in the embodiment of Figure 2.

[0158] In order to be able to use the temperature sensor 174 in conjunction with the electrical device 10, two sensor contact terminals 176 and 178 of the temperature sensor 174 are optionally electrically operatively connected to two sensor contacts 180 and 182, respectively, accessible on the outside of the battery container 138. For this purpose, corresponding connection contacts (not shown in the figures) can be provided on the battery device receptacle 28, which enter into an electrically conductive operative connection with the sensor contacts 180 and 182, respectively, when the battery device 12 is received in the operating position in the battery device receptacle 28. This makes it possible, for example, via a control and / or regulating device of the electrical device 10, to measure a temperature of the battery device 12 with the temperature sensor 174 and then to use it, in particular, to control the electrical device 10.For example, a temperature measured by the temperature sensor 174 that is above a predetermined limit value can lead to the automatic shutdown of the electrical device 10 in order to prevent overheating of the battery device 12 or the battery cell 22.

[0159] As already explained, all battery devices 12 described above have a design that enables reverse-polarity-protected coupling or corresponding insertion into a battery device receptacle 28 of an electrical device 10 provided for this purpose. Thus, battery cells 22 that cannot be used with reverse-polarity protection due to their geometric and, in particular, rotationally symmetrical shape can be designed to be safe to handle even for laypersons. In particular, lithium-ion cells designed in the form of round cells 64 can be used like commercially available disposable batteries to supply power to electrical devices 10. They can be easily and safely replaced by a user, for example, if they are defective or need to be recharged. This handling is achieved via the battery container 38 of the battery device 12, which can accommodate one, two, three, or more battery cells 22.

[0160] The structural design of the battery container 38 also enables coding of the battery device 12 such that only certain battery devices 12 approved by a manufacturer can be inserted into the battery device receptacle 28 of the electrical device 10 intended for this purpose.

[0161] Thus, the described battery devices 12 enable a user to handle them safely and without danger, similar to conventional disposable batteries, in order to supply electrical devices 10 with electrical energy independently of the mains.

[0162] List of reference symbols

[0163] Electrical appliance Battery device Window cleaning device Window cleaning device Floor cleaning device Consumer Battery cell Heating device Electric motor

[0164] Battery device holder household appliance cleaning device garden tool

[0165] Power tool Battery container Receiving space First container terminal connection area Second container terminal connection area First battery terminal opening Second battery terminal opening Surroundings

[0166] Connection projection outer surface

[0167] Connecting element first battery pole second battery pole housing round cell

[0168] Insulation layer Cell longitudinal axis Container longitudinal axis First housing part Second housing part

[0169] Coupling device

[0170] Locking and / or snap-in connection device first coupling element second coupling element

[0171] Coupling projection

[0172] Coupling recess

[0173] Sliding surface

[0174] Retention area

[0175] Rest area

[0176] Housing edge

[0177] connecting bridge

[0178] Connection recess

[0179] Recess area

[0180] front wall

[0181] front wall

[0182] ventilation opening

[0183] securing link

[0184] Current limiting element

[0185] fuse

[0186] Contact element

[0187] Contact section

[0188] Retention section

[0189] frontal surface

[0190] frontal surface

[0191] frontal surface

[0192] Retaining flange

[0193] Ring flange first connection contact element second connection contact element

[0194] Contact advantage

[0195] Wall surface Securing device First securing element Second securing element Securing projection Securing recess Retaining plate Closure element Cover Connecting element Screw Recess Prestressing element Arrow Spring element Sleeve section End surface End surface Sleeve wall section Temperature sensor Sensor contact connection Sensor contact connection Sensor contact Sensor contact

Claims

Patent claims 1. A battery device (12) comprising a battery container (38) for accommodating at least one rechargeable battery cell (22), wherein the battery container has a receiving space (40) for accommodating the at least one battery cell (22), wherein the battery container (38) has a first container terminal connection area (42) and a second container terminal connection area (44), wherein the battery container (38) has a first battery terminal opening (46) and a second battery terminal opening (48) which fluidically connect an environment (50) of the battery container (38) and the receiving space (40), characterized in that the first battery terminal opening (46) is arranged or formed at the first container terminal connection area (42) and that the second battery terminal opening (48) is arranged or formed at the second container terminal connection area (44), that the battery device (12) does not comprise any active electrical or electronic components,in particular, no control and / or regulating device for controlling and / or regulating the charging and discharging of the at least one battery cell (22), and that the battery container (38) is designed such that it must be irreversibly destroyed in order to remove the at least one rechargeable battery (22).

2. Battery device according to claim 1, characterized in that the first container terminal connection region (42) and the second container terminal connection region (44) are differently shaped.

3. Battery device according to one of the preceding claims, characterized in that the first container terminal connection area (42) a) is designed for positive or substantially positive engagement with a second container terminal connection area (44) of a further battery container (38) and / or b) is designed in the form of a connection projection (52), wherein in particular the connecting projection (52) tapers away from the receiving space (40) and has an outer surface (54) which corresponds or substantially corresponds to an outer surface of a truncated cone.

4. Battery device according to one of the preceding claims, characterized in that the second container pole connection area (44) is designed in the form of a connection recess (98), wherein in particular a) the connection recess (98) widens away from the receiving space (40) and is delimited by a recess surface (100) which corresponds to an inner circumferential surface of a truncated cone, and / or b) the connection projection (52) and the connection recess (98) are designed to correspond to one another.

5. Battery device according to one of the preceding claims, characterized in that the battery container (38) forms a housing (62) for the at least one battery cell (22) and that the first container pole connection region (42) and the second container pole connection region (44) a) are directly and non-detachably connected to one another or b) are formed in one piece, in particular monolithically.

6. Battery device according to one of the preceding claims, characterized in that the battery container (38) defines a container longitudinal axis (70) and has a shape deviating from a rotational symmetry with respect to the container longitudinal axis (70).

7. Battery device according to one of the preceding claims, characterized in that at least one first securing element (140) of a securing device (138) is arranged on the battery container (38). or is designed, which securing device (138) comprises at least one second securing element (142), such that the at least one first securing element (140) is in force-locking and / or positive-locking engagement in a securing position with the correspondingly designed second securing element (142), which is designed on an electrical device (10) for the energy supply of which the battery device (12) serves, wherein the at least one second securing element (142) is arranged or designed on the electrical device (10) on or in the region of a battery device receptacle (28), which is designed to receive, in particular for the clearly defined reception, of the at least one battery device (12) in an operating position of the electrical device (10), wherein in particular a) the at least one first securing element (140) extends in a direction transverse, in particular perpendicular, to a container longitudinal axis (70) of the battery container (38),wherein in particular the at least one first securing element (140) is arranged or formed so as to surround the container longitudinal axis (70), and / or b) the at least one first securing element (140) is formed in the form of a securing projection or a securing recess (146).

8. Battery device according to one of the preceding claims, characterized in that at least one ventilation opening (106) is arranged or formed on the battery container (38), which fluidically connects the receiving space (40) and an environment (50) of the battery device (12).

9. Battery device according to one of the preceding claims, characterized in that the battery container (38) is formed in at least two parts, in particular exactly two parts, and at least a first Housing part (72) and at least one second housing part (74), in particular only a first housing part (72) and only a second housing part (74), wherein in particular the at least one first housing part (72) a) and the at least one second housing part (74) are connected to one another in a force-fitting and / or form-fitting and / or material-fitting manner, in particular glued and / or welded, in particular in the operating position, and / or b) comprises the first container terminal connection area (42), and wherein the at least one second housing part (74) comprises the second container terminal connection area (44), and / or c) completely comprises the first container terminal connection area (42), and wherein the at least one second housing part (74) completely comprises the second container terminal connection area (44), and / or d) and the at least one second housing part (74) are sleeve-shaped and comprise at least one self-contained sleeve section (166) surrounding the container longitudinal axis (70),wherein in particular the sleeve-shaped housing parts (72, 74) are designed such that one housing part (74) can be inserted into the other housing part (72), and / or e) partially encompasses or forms the first container pole connection area (42) and wherein the at least one second housing part (74) partially encompasses or forms the second container pole connection area (44) and / or, f) and the at least one second housing part (74) are partially shell-shaped, in particular half-shell-shaped, and delimit the receiving space (40) only over part of its circumference relative to the container longitudinal axis (70) and / or g) and the at least one second housing part (74) are clamped together.

10. Battery device according to claim 9, characterized in that the battery container (38) comprises a coupling device (76) for coupling the at least one first housing part (72) and the at least one second housing part (74) in a coupling position, wherein in particular the coupling device (76) a) is designed in the form of a latching and / or snap-in connection device (78) and / or b) comprises first and second coupling elements (80, 82) which are arranged or formed on the one hand on the at least one first housing part (72) and on the other hand on the at least one second housing part (74), and wherein the first and second coupling elements (80, 82) are engaged in a force-fitting and / or form-fitting manner in the coupling position and are disengaged in an assembly position, wherein in particular the first and second coupling elements (80,82) are designed in the form of mutually corresponding coupling projections (84) and coupling recesses (86).

11. Battery device according to one of the preceding claims, characterized in that the battery device (12) comprises at least one rechargeable battery cell (22) which is accommodated in the battery container (38), wherein in particular the at least one battery cell (22) has a first battery pole (58) and a second battery pole (60), and wherein the first battery pole (58) is accessible through the first battery pole opening (46) and wherein the second battery pole (60) is accessible through the second battery pole opening (48).

12. Battery device according to one of the preceding claims, characterized in that the battery device (12) comprises a passive electrical safety element (108) which is operatively connected in an electrically conductive manner to a battery pole of the battery cell (22), in particular to the positive pole, wherein in particular the passive electrical safety element (108) is designed in the form of a passive current limiting element (110), in particular in the form of a fuse (112).

13. Battery device according to one of the preceding claims, characterized in that the battery device (12) comprises at least one electrically conductive contact element (114) which is electrically conductively connected to a battery pole (58) of the battery cell (22), wherein in particular the passive electrical securing element (108) is arranged or formed between the electrically conductive contact element (114) and one of the two battery poles (58, 60).

14. Battery device according to claim 13, characterized in that the electrically conductive contact element (114) comprises a contact section (116) and a retaining section (118) and in that the contact section (116) is arranged or formed in the region of the first or second battery pole opening (46, 48), in particular passing through it, wherein in particular a) an inner diameter of the first or second battery pole opening (46, 48) corresponds to or substantially corresponds to the outer diameter of the contact section (116) and / or b) the retaining section (118) forms an end of the electrically conductive contact element (114) facing the first or second battery pole (58, 60) and has an outer diameter which is greater than an outer diameter of the contact section (116), and / or c) a retaining flange (126), in particular in the form of an annular flange (128), projecting in the radial direction relative to the container longitudinal axis (70) is formed on the retaining section (118), and / or d) the passive electrical securing element (108) is operatively connected in an electrically conductive manner directly to the retaining section (118).

15. Battery device according to claim 13 or 14, characterized in that the electrically conductive contact element (114) is arranged or formed protruding from the battery container (38) through the first or second battery pole opening (46, 48).

16. Battery device according to one of claims 11 to 15, characterized in that the at least one battery cell (22) a) is designed in the form of a round cell (64) and / or b) is designed rotationally symmetrically, in particular cylindrical, and / or c) is designed in the form of a lithium-ion cell.

17. Battery device according to one of the preceding claims, characterized in that the battery device (12) comprises a temperature sensor (174), wherein in particular the temperature sensor (174) has two sensor connection contacts (176, 178) and wherein two sensor contacts (180, 182) accessible on the outside of the battery container (38) are each electrically operatively connected to one of the two sensor connection contacts (176, 178).

18. Electrical device (10) comprising at least one electrical consumer (20) and at least one battery device (12), wherein the at least one battery device (12) comprises a battery container (38) and at least one rechargeable battery cell (22) accommodated in the battery container (38) for supplying the at least one electrical consumer (20) with electrical energy, characterized in that the at least one battery device (12) is designed in the form of a battery device (12) according to one of the preceding claims.

19. Electrical appliance according to claim 18, characterized in that the at least one electrical consumer (20) is designed in the form of a heating device (24) or an electric motor (26).

20. Electrical device according to claim 18 or 19, characterized in that the electrical device (10) comprises a battery device receptacle (28) for receiving the at least one battery device (12).

21. Electrical device according to claim 20, characterized in that the electrical device (10) comprises a securing device (138) for mechanically securing the at least one battery device (12) in the battery device receptacle (28) in an operating position of the electrical device (10), wherein in particular the securing device (138) is designed for defined axial positioning and / or axial securing of the at least one battery device (12) in the battery device receptacle (28) in the operating position of the electrical device (10) against movement in a direction parallel or substantially parallel to a container longitudinal axis (70) of the battery container (38).

22. Electrical device according to claim 21, characterized in that the safety device (138) comprises first and second safety elements (140, 142) which are arranged or formed on the one hand on the battery device (12) and on the other hand on the electrical device (10), and in that the first and second securing elements (140, 142) are non-positively and / or positively engaged in a securing position of the securing device (138) and are disengaged in a separated position in which the at least one battery device (12) is removed from the battery device receptacle (28), wherein in particular a) the at least one battery device (12) comprises the at least one first securing element (140) and wherein the electrical device (10) comprises the at least one second securing element (142) and / or b) the at least one second securing element (142) is designed in the form of a securing projection (144) or a securing recess and / or c) the at least one second securing element (142) is designed in the form of a securing projection (144),which, in the operating position, engages in a corresponding securing recess (146) on the battery device (12), and / or d) the at least one second securing element (142) is formed on the battery device receptacle (28), in particular is formed integrally therewith, and / or e) the at least one second securing element (142) is designed to be detachably connectable to the battery device receptacle (28), and / or f) the at least one second securing element (142) is designed in the form of a retaining bracket or a retaining plate (148).

23. Electrical appliance according to one of claims 20 to 22, characterized in that on the battery device holder (28) first and second Connection contact elements (130, 132) are arranged or formed which, in the operating position, are each electrically connected to one of the two battery poles (58, 60).

24. Electrical device according to claim 23, characterized in that at least one of the connection contact elements (132) is movably arranged on the battery device receptacle (28) for engaging and disengaging with one of the two battery pole connection areas (44) of the battery device (12), wherein in particular the movable connection contact element (132) a) has a shape that is geometrically similar to one of the two battery pole connection areas (44) and / or b) is designed to correspond to the second battery pole connection area (44) of the battery device (12) and is in force-locking and / or form-locking engagement therewith in the operating position and / or c) protrudes into the battery device receptacle (28) in the operating position and in an insertion position in which the battery device (12) can be inserted into the battery device receptacle (28),releases the battery device holder (28) and / or d) assumes the operating position in a basic position., 25. Electrical appliance according to one of claims 18 to 24, characterized in that the electrical appliance (10) is designed in the form of a garden or household appliance (30) or in the form of a power tool.

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