Battery device

Abstract

Battery device with a sealing device (12a; 12b) designed to seal at least one electrical area (14a; 14b) in a dustproof and / or watertight manner, with a first electrical contact (16a; 16b) and at least one second electrical contact (18a; 18b) designed to transmit electrical operating energy and / or information, with at least one water film separating agent (20a, 22a, 24a; 20b) designed to prevent the formation of a direct water film between the first contact (16a; 16b) and the second contact (18a; 18b) in at least one operating state, characterized in that the battery device has at least one water drainage slot (32a; 32b) which is defined by the water film separating agent (20a; 20b), wherein the water drainage slot (32a; 32b) is designed such that water from an area between the contacts can drain into the water film separating agent (20a; 20b). the battery housing (82b) can run.

Description

State of the art

[0001] A battery device, in particular a tool battery device, with a sealing device which is intended to close at least one electrical area in an at least dust-tight and / or watertight manner, with a first electrical contact and at least one second electrical contact which are intended to transmit electrical operating energy and / or information, has already been proposed.

[0002] US 2013 / 0224539 A1 describes a battery pack with a drainage device. EP 0 994 523 A1 describes a battery pack with an inner and an outer housing. JP 2006100126 A describes a car battery with water drains. Disclosure of the invention

[0003] The invention is based on a battery device, in particular a tool battery device, with a sealing device which is intended to close at least one electrical area in a way which is at least dust-tight and / or watertight, with a first electrical contact and at least one second electrical contact which are intended to transmit electrical operating energy and / or information.

[0004] It is proposed that the battery device comprise at least one water film separating agent which is provided to prevent the formation of a direct water film between the first contact and the second contact, in particular in the event of water penetration in at least one operating state. A “sealing device” is to be understood in particular as a device which appears appropriate to a person skilled in the art and which is suitable for preventing dust and / or moisture from penetrating the cell block. In particular, the sealing device prevents dust and / or moisture from penetrating an essentially entire area between the battery cells of the cell block. In particular, a “sealing device” is not to be understood as a device which seals or electrically insulates an individual battery cell. “Provided” is to be understood in particular as specially programmed, designed and / or equipped.The fact that an object is intended for a specific function should be understood in particular to mean that the object fulfills and / or performs this specific function in at least one application and / or operating state. In particular, an “electrical region” should be understood to mean a region in which an electrical system and / or an electronic system is at least partially arranged. Preferably, an electrical system, with the exception of the contacts, in particular an electronic system, is arranged at least substantially entirely in the electrical region. Preferably, only the electrical contacts are arranged outside the electrical region. Preferably, the electrical system comprises battery cells, electrical connecting means and electronics of the battery. Preferably, at least one cell block and advantageously the electronics are arranged in the electrical region.A “cell block” should be understood in particular to mean a unit with a plurality of battery cells that are intended to deliver electrical energy, in particular to a tool. The cell block preferably comprises at least two battery cells, advantageously at least eight battery cells, particularly advantageously at least 16 battery cells. The battery cells are advantageously arranged in a fixed position relative to one another. A heat dissipation means of the cell block particularly advantageously arranges the battery cells relative to one another. In particular, the cell block has a cell block housing that is intended to fasten the heat dissipation means and, advantageously, thus the battery cells to one another. In particular, the cell block forms an assembly at least during one assembly step. The cell block is preferably intended to provide electrical energy with a voltage greater than 12 volts, particularly advantageously greater than 20 volts.In particular, the cell block is intended to provide electrical energy with a voltage of less than 50 volts. In particular, the cell block, and thus the battery, has a storage capacity of less than 1000 watt-hours, advantageously less than 500 watt-hours, particularly advantageously less than 250 watt-hours. In particular, the cell block, and thus the battery, has a storage capacity of more than 10 watt-hours, advantageously more than 25 watt-hours, particularly advantageously more than 100 watt-hours. The term “electronics” should be understood in particular as a device that influences at least one electrical current in a gas, in a conductor, in a vacuum and / or advantageously in a semiconductor. The electronics preferably has at least one transistor, particularly preferably at least one microprocessor.In particular, the phrase “protect against the ingress of dust and / or moisture” should be understood to mean that the sealing device prevents the ingress of water and / or dust into the cell block in at least one operating state. The sealing device preferably protects the cell block in accordance with the IEC 60529 standard with at least protection class IP55, preferably IP67, particularly preferably IP68. Electrical contacts of the battery, in particular power contacts and communication contacts of the battery, are preferably arranged in an area that lies outside an area protected by the sealing device. A “contact” should be understood in particular to mean an electrically conductive means that is intended to transmit power and / or information to a tool connected to the tool interface of the battery. The contact preferably has a contact tulip or a contact pin.In particular, “electrical operating energy” should be understood to mean electrical energy that is provided to carry out a designated main function of the tool. In particular, a “water film separating agent” should be understood to mean a means that is provided to prevent malfunctions caused by water between the electrical contacts. Preferably, the water film separating agent interrupts a direct water film between the electrical contacts in at least one operating state. Alternatively or additionally, the water film separating agent is provided to prevent a connection between two water films that each touch one of the contacts. In particular, the water film separating agent separates the water film, at least when an area between the contacts is emptied after being completely flooded with water. Preferably, the battery-powered device has a plurality of water film separating agents, particularly preferably two water film separating agents.Alternatively, the battery device could have precisely one water film separating agent. A "direct water film" is to be understood in particular as a layer of water adhering to a surface, which connects the first contact and the second contact along a path that essentially corresponds to a shortest distance between the contacts outside the electrical area. In this context, "essentially" is to be understood as meaning that the water film separating agent prevents a water film in at least one operating state, the path between the contacts being shorter than twice the shortest distance between the contacts, advantageously shorter than one and a half times the shortest distance between the contacts. The inventive design of the battery device can advantageously reduce a leakage current between the contacts to such an extent that malfunction and corrosion due to electrolysis are avoided.

[0005] In a further embodiment, it is proposed that the battery device have a housing part that at least partially forms the water film separating means, thereby enabling cost-effective production. A "housing part" is to be understood, in particular, as a component of an outer housing of the battery device. Preferably, a housing part of a cell block housing of the cell block of the battery device forms the water film separating means. Alternatively or additionally, a housing part of an outer battery housing of the battery device, in particular a cover part of the outer battery housing, could form the water film separating means. Furthermore, the water film separating means could be designed as a separate component.In particular, the term “form” in this context is to be understood as meaning that the housing part has a shape which prevents a direct water film between the first contact and the second contact in at least one operating state.

[0006] Furthermore, it is proposed that the water film separation agent be formed at least partially from a hydrophobic material, whereby the water film can be separated particularly effectively. A "hydrophobic material" is to be understood in particular as a material that has a contact angle with water greater than 60 degrees, advantageously greater than 90 degrees. Preferably, the hydrophobic material forms at least one surface of the water film separation agent. Particularly advantageously, the agent forming the water film separation agent is formed entirely from a hydrophobic material. Alternatively or additionally, the agent forming the water film separation agent could be at least partially coated with a hydrophobic material, for example Teflon.

[0007] It is further proposed that the water film separating means be arranged between the first contact, which transmits the electrical operating energy during operation, and the second contact, which transmits information, in particular to a tool and / or a battery charger, in at least one operating state, whereby the influence of an operating voltage of the operating energy on a signal that transmits the information to the tool can be advantageously reduced. In particular, the term "between" in this context is to be understood to mean that at least one area of ​​action of the water film separating means, and advantageously the water film separating means itself, lies on at least one straight line which, starting from the water film separating means, intersects the first contact on a first side and the second contact on a second, different side.

[0008] In addition, it is proposed that the battery device has at least a third contact which transmits the electrical operating energy during operation, whereby a structurally simple information transmission can be achieved.

[0009] It is further proposed that the second contact be arranged between the first contact and the third contact, thereby allowing a large distance between the first contact and the third contact in a simple design, resulting in a low leakage current between the contacts due to the water film. Preferably, the battery device has two water film separating means, one of which is always arranged between two of the contacts.

[0010] In an advantageous embodiment of the invention, it is proposed that the water film separation means delimit at least one water drainage slot, whereby a small space requirement can be achieved in contrast to a construction with partition walls. A “water drainage slot” should be understood in particular to be a slot which is intended to drain water from areas between the contacts in the direction of gravity. In particular, the water drainage slots guide the water into a housing of the battery device. Preferably, the battery device has a plurality of water film separation means which delimit a plurality of water drainage slots. Preferably, the water drainage slot has a constant width along a drainage direction. Alternatively, the water drainage slot could have different widths along the drainage direction.Furthermore, the water film separating means could comprise a screen arranged on a side of the housing part facing away from the contacts and positioned at least partially in the drainage direction of the water drainage slot. The screen can advantageously create a closed impression for the observer and prevent the penetration of larger objects into an area defined by the housing part.

[0011] Furthermore, it is proposed that the water film separating means form a partition, whereby a malfunction caused by a faulty current can be prevented even when there is a large amount of water between the contacts, in particular even in a completely flooded area. In particular, a "partition" is understood to mean a means that separates a space in which the first contact is arranged from a space in which the second contact is arranged. Preferably, the battery device has a plurality of water film separating means that form a plurality of partitions.

[0012] Furthermore, a rechargeable battery, in particular a tool battery, with a rechargeable battery device according to the invention is proposed. In particular, a "tool battery" is to be understood as a rechargeable battery intended to supply a tool with electrical energy. In particular, a "tool" is to be understood as a tool that appears appropriate to a person skilled in the art, but advantageously a drill, a hammer drill, a percussive hammer, a saw, a planer, a screwdriver, a milling machine, a grinder, an angle grinder, a construction site measuring device, a multi-function tool and / or advantageously a gardening tool, in particular a lawnmower. Alternatively or additionally, the rechargeable battery could be intended to supply an at least partially electrically powered bicycle with electrical energy. In particular, the rechargeable battery can be connected to and disconnected from the device by an operator to supply a device in a non-destructive manner and in particular without tools.

[0013] Furthermore, a battery charger, in particular a tool battery charger, with a battery device according to the invention is proposed. A "battery charger" is understood to mean, in particular, a device designed to convert a supply voltage, in particular an on-board voltage and / or a mains voltage, into a charging voltage. The battery charger is preferably designed to control and / or advantageously regulate a charging process.

[0014] The battery device according to the invention is not intended to be limited to the application and embodiment described above. In particular, the battery device according to the invention may have a number of individual elements, components, and units that differs from the number stated herein to fulfill a functionality described herein. drawing

[0015] Further advantages will become apparent from the following description of the drawings. The drawings illustrate two exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0016] They show: Fig. 1 a battery with a battery device according to the invention in a perspective view, Fig. 2 a section through a tool interface of the battery Fig. 1, Fig. 3 a cell block, contacts and a sealing device of the battery Fig. 1 in a perspective view, Fig. 4 a cross-sectional view of the battery Fig. 1, Fig. 5 a battery charger with a battery device according to the invention in a perspective view, Fig. 6 a sectional view of the battery charger from Fig. 4 and Fig. 7 a housing part of the battery charger comprising the water film separating agent from Fig. 4 in a perspective view. Description of the embodiments

[0017] Fig. 1 to 4 show a battery 34a of a system with the battery 34a and a Fig. 5 to 7. The battery 34a is designed as a tool battery. The battery 34a has a battery device 10a according to the invention. The battery device 10a is intended to protect an electrical area 14a of the battery 34a and a tool interface 38a of the battery 34a from damage and malfunction due to dust, dirt, and water when used in a humid environment.

[0018] Furthermore, the battery 34a has a cell block 40a and a battery outer housing 42a. The battery outer housing 42a encloses the cell block 40a. The battery outer housing 42a has a base body 44a and a cover housing part 46a. The tool interface 38a is arranged on the cover housing part 46a. The cover housing part 46a forms an upper side of the battery 34a. The cover housing part 46a is formed as a plastic part.

[0019] The tool interface 38a is provided to establish a mechanical and an electrical connection to a tool, to a bicycle, or to the battery charger 36b. For the mechanical connection, the tool interface 38a has guide rails 48a and at least one locking means 50a. The guide rails 48a and the locking means 50a are formed by the battery outer housing 42a. The tool interface 38a has a first contact 16a, a second contact 18a, and a third contact 30a. An operating voltage of the cell block 40a is applied between the first contact 16a and the third contact 30a. The second contact 18a transmits information between the cell block 40a and the tool, the bicycle, or the battery charger 36b in at least one operating state. The second contact 18a is arranged between the first contact 16a and the third contact 30a.

[0020] The cell block 40a includes heat dissipation means 52a, a plurality of battery cells 54a, a cell block housing 56a, electronics 58a, and fastening means 60a. The electronics 58a are designed to monitor battery voltages and temperatures of the battery cells 54a and to prevent damage to the battery cells 54a. The cell block housing 56a is designed to connect the heat dissipation means 52a, the battery cells 54a, the electronics 58a, and the fastening means 60a into an assembly that forms the cell block 40a.

[0021] The cell block housing 56a defines the electrical area 14a, in which the electronics 58a and the battery cells 54a are arranged. The contacts 16a, 18a, 30a of the tool interface 38a are partially cast into the cell block housing 56a. The cell block housing 56a has air conditioning openings 62a, which are sealed with a waterproof, breathable membrane (not shown in detail here).

[0022] A sealing device 12a of the battery device 10a is provided to seal the electrical area 14a of the cell block 40a, which is spanned by the cell block housing 56a. The sealing device 12a comprises a sealing film 64a, a first sealing means 66a, and a second sealing means 68a. The sealing film 64a is tubular. Alternatively, a sealing film could be bag-shaped. The sealing film 64a is self-shrinking. The sealing film 64a rests against the cell block 40a on a front side, a rear side, and both lateral sides. The sealing film 64a covers these sides at least substantially completely.

[0023] The first sealant 66a is designed as a sealing compound. Here, the first sealant 66a is designed as a butyl sealant. The first sealant 66a is intended to seal a gap between the cell block housing 56a and the sealing film 64a. Thus, the first sealant 66a prevents dust and / or moisture from penetrating the cell block 40a.

[0024] The second sealing means 68a seals an underside of the cell block 40a facing away from the tool interface 38a. The second sealing means 68a is formed as a self-adhesive film. The second sealing means 68a closes an opening in the tubular sealing film 64a facing away from the tool interface 38a. Thus, the sealing device 12 encloses the cell block 40 on five sides. The sixth side is sealed by the cell block housing 56a.

[0025] The battery device 10a has a plurality of water film separating means 20a, 22a, 24a. The water film separating means 20a, 22a, 24a are provided to prevent the formation of a direct water film between the first contact 16a, the second contact 18a, and / or the third contact 30a in at least one operating state. The water film separating means 20a, 22a, 24a are each operatively arranged between the first contact 16a and the second contact 18a or between the second contact 18a and the third contact 30a. The first contact 16a and the third contact 30a are designed as contact tulips. The second contact 16a has two separately formed contact springs that can be deflected outward.

[0026] Two of the water film separating means 20a are formed by a housing part 26a, which is designed as the cover housing part 46a of the battery outer housing 42a. These two water film separating means 20a are designed as water drainage slots 32a delimited by the housing part 26a. Water can escape from an area of ​​the contacts 16a, 18a, 30a through the water drainage slots 32a when the battery 34a is arranged with the cover housing part 46a facing downward in the battery charger 36b. The water drainage slots 32a are spatially arranged between contact slots 70a through which the contacts 16b, 18b, 30b of the battery charger 36b contact the contacts 16a, 18a, 30a of the battery 34a. The water drainage slots 32a are aligned parallel to the contact slots 70a. The water drainage slots 32a have a main extension that is aligned parallel to a coupling direction 72a of the tool interface 38a.

[0027] The water drainage slots 32a have a width, in particular perpendicular to the main extension, which is greater than a droplet size of the particularly draining water film, which is determined by a surface tension of the water and a material of the water film separating means 20a.

[0028] Two further water film separating means 22a are also formed by the housing part 26a, which is designed as the cover housing part 46a of the battery outer housing 42a. The two water film separating means 22a are designed as partition walls formed by the housing part 26a. One of these water film separating means 22a is arranged between the first contact 16a and the second contact 18a, and another of these water film separating means 22a is arranged between the second contact 18a and the third contact 30a. The water film separating means 22a have a main extension that is aligned parallel to the coupling direction 72a of the tool interface 38a. The water film separating means 22a extend in a plane that is aligned perpendicular to a straight line that connects the contacts 16a, 18a, 30a along the shortest path.

[0029] Two of the water film separators 24a are formed by a housing part 28a of the cell block housing 56a. The water film separators 24a themselves are designed as partition walls. The water film separators 24a have a main extension parallel to a main extension of the contacts 16a, 18a, 30a, which corresponds to more than 50% of the main extension of one of the contacts 16a, 18a, 30a. The water film separators 24a are provided to secure at least one of the contacts 16a, 18a, 30a, specifically the second contact 18a in this case. The water film separators 24a are arranged at a distance from the second contact 18a in a region such that the second contact 18b can rebound. The cover housing part 46a and the cell block housing 56a and thus the water film separating means 20a, 22a, 24a are made of a hydrophobic material.

[0030] The base body 44a of the battery outer housing 42a has a base element 74a and two heat-radiating elements 76a. The base element 74a defines the battery 34a on a bottom side, a front side, and a rear side, each relative to a coupling direction 72a of the tool interface 38a. Furthermore, the base element 74a forms four corners adjacent to the bottom side. The base element 74a is formed as a plastic part.

[0031] The two heat radiation means 76a each delimit the battery 34a on a lateral side. The heat radiation means 76a are formed as aluminum bodies. The heat radiation means 76a have cooling fins on an outer side. The heat radiation means 76a, the base body 44a, and the cover housing part 46a are screwed together. Together, the heat radiation means 76a, the base body 44a, and the cover housing part 46a completely enclose the cell block 40a. Alternatively or additionally, a battery could have one or more heat radiation means, for example, on the front, the back, and / or the underside.

[0032] The heat dissipation means 52a are provided to dissipate heat from the cell block 40a during a charging and discharging process. The heat dissipation means 52a extend along a straight line through the entire cell block 40a. The battery cells 54a are arranged on two opposite sides of the heat dissipation means 52a. The heat dissipation means 52a define partially cylindrical recesses, which are intended to at least partially accommodate the battery cells 54a. One of the fastening means 60a is arranged between each of the heat dissipation means 52a and the battery cells 54a. The fastening means 60a prevent direct contact between the heat dissipation means 52a and the battery cells 54a. The fastening means 60a are designed as electrically insulating and, in particular, partially elastic layer elements. The fastening means 60a consist of a material with good thermal conductivity that appears appropriate to a person skilled in the art.

[0033] The heat dissipation means 52a and the heat radiation means 76a are formed as separate components. The heat dissipation means 52a and the heat radiation means 76a are connected to each other by screws 78a. The screws 78a press one of the heat dissipation means 52a and one of the heat radiation means 76a against the sealing film 64a from two different sides. The screws 78a thus exert a pressing force on the sealing film 64a. As a result, the heat dissipation means 52a and the heat radiation means 76a lie flat against the sealing film 64a.

[0034] The fastening means 60a conducts heat generated in the battery cells 54a during charging and discharging to the heat dissipation means 52a. The heat dissipation means 52a conduct this heat out of the cell block 40a to the sealing film 64a. The sealing film 64a conducts a significant portion of the heat to the heat radiation means 76a. The screws 78a conduct a further portion of the heat to the heat radiation means 76a. The heat radiation means 76a dissipate the heat to the surroundings of the battery 34a by radiation and convection.

[0035] In the Fig. 5 to 7, a further embodiment of the invention is shown. The following descriptions and the drawings are essentially limited to the differences between the embodiments, whereby with regard to components with the same designation, in particular with regard to components with the same reference numerals, reference is also made to the drawings and / or the description of the other embodiments, in particular to the Fig. 1 to 4. To distinguish the embodiments, the letter a is added to the reference numerals of the embodiment in the Fig. 1 to 4. In the example of the Fig. In paragraphs 5 to 7, the letter a is replaced by the letter b.

[0036] The Fig. 5 to 7 show the battery charger 36b of a system with the Fig. 1 to 4 and the battery charger 36b. The battery charger 36b is designed as a tool battery charger. The battery charger 36b has a battery device 10b, an electronics housing 80b, a battery receptacle housing 82b, an electronics unit 84b, and a cooling device 86b. The battery device 10b is designed as a tool battery device. The battery device 10b includes a sealing device 12b, a battery interface 88b, a plurality of water film separating means 20b, and a housing part 26b.

[0037] The electronics housing 80b is designed as a metal housing. The electronics housing 80b has cooling fins on at least one outer side. The sealing device 12b is provided to seal an electrical area 14b, which is spanned by the electronics housing 80b and in which the electronics 84b is arranged, in an at least dust-tight and / or watertight manner. The sealing device 12b comprises a sealing means 90b that seals a gap between a cover element 92b of the electronics housing 80b and a base body 94b of the electronics housing 80b.

[0038] Furthermore, the sealing device 12b comprises two cable seals 96b, 98b. A first of the cable seals 96b is provided to seal a supply cable 100b of the battery charger 36b, to which a mains and / or on-board voltage is applied, in a recess of the electronics housing 80b. A second of the cable seals 98b is provided to seal a cable (not shown in detail) of the battery charger 36b that contacts the cooling device 86b and the battery interface 88b.

[0039] The battery interface 88b is intended to connect the Fig. 1 to 4. The battery interface 88b has the first contact 16b, the second contact 18b, and the third contact 30b. The first contact 16b and the third contact 30b are intended to jointly transmit charging energy to the battery 34a. The second contact 18b, in particular together with the first contact 16b and / or the third contact 30b, is intended to transmit information between the battery 34a and the electronics 84b.

[0040] The contacts 16b, 18b, 30b are connected to the Fig.7. The housing part 26b is connected to the battery housing 82b. Alternatively, the housing part 26b and the battery housing 82b could be formed integrally. The housing part 26b forms the two water film separating means 20b. The water film separating means 20b each define a water drainage slot 32b. Water can drain from an area between the contacts 16b, 18b, 30b into the battery housing 82b through the water drainage slots 32b.

[0041] The water film separating means 20b have a main extension parallel to a main extension of the contacts 16b, 18b, 30b, which is greater than the main extension of the contacts 16b, 18b, 30b. The water film separating means 20b extend in two directions parallel to the main extension of the contacts 16b, 18b, 30b beyond the contacts 16b, 18b, 30b. The housing part 26b has webs 102b that bridge the water drainage slots 32b in a region spaced apart from the contacts 16b, 18b, 30b, thus mechanically stabilizing them.

[0042] The water drainage slots 32b extend into a region intersected by a main extension plane of one of the contacts 16b, 18b, 30b. The contacts 16b, 18b, 30b are arranged on two surfaces 104b, 106b that are oriented perpendicular to each other. The water drainage slots 32b border both surfaces 104b, 106b. The water drainage slots 32b interrupt at least one of the two surfaces 104b, 106b, but preferably both surfaces 104b, 106b, between the contacts 16b, 18b, 30b. Alternatively or additionally, a water film separating means, in particular a water drainage slot, could be arranged on each of the two surfaces 104b, 106b.

[0043] One of the water film separating means 20b is operatively and in particular spatially arranged between the first contact 16b and the second contact 18b. One of the water film separating means 20b is operatively and in particular spatially arranged between the second contact 18b and the third contact 30b. In at least one operating state, the water film separating means 20b prevent the formation of a direct water film between the first contact 16b and the second contact 18b and / or the second contact 18b and the third contact 30b. The battery housing 82b has openings (not shown in detail) on an underside through which the water and / or dirt drained through the water drainage slots 32b can escape from the battery housing 82b.

[0044] Components of the electronics 84 that generate significant waste heat during operation are thermally connected to the cover element 92b of the electronics housing 80b. The cover element 92b and the base body 94b of the electronics housing 80b are partially thermally decoupled by the sealant 90b. As a result, the cover element 92b has a higher temperature during operation than the base body 94b. The base body 94b has outer surfaces that are touchable by an operator. The cover element 92b is covered by the battery housing 82b.

[0045] The battery housing 82b is formed as a plastic housing. The battery housing 82b completely encloses a battery receiving area 108b, in which the battery 34a is arranged during a charging process, on at least one plane. In particular, the battery housing 82b encloses the battery receiving area 108b in a tunnel shape. The cooling device 86b has a fan 110b, which moves an air stream 112b through the battery housing 82b during a charging process, thereby cooling the battery 34a. The fan 110b moves the air stream 112b past the cover element 92b to cool the cover element 92b. The cover element 92b has cooling fins, at least in one area, past which the air stream 112b passes.

[0046] A distance 114a between the two water film separating means 20a of the battery 34a and a distance 114b between the two water film separating means 20b of the battery charger 36b, which respectively delimit the water drainage slots 32a; 32b, each perpendicular to the coupling direction 72a, are equal in at least one region of the water drainage slots 32a; 32b. Thus, water located in the battery outer casing 42a can drain through the water drainage slots 32a of the battery 34a and the water drainage slots 32b of the battery charger 36b.

Claims

[1] Rechargeable battery device with a sealing device (12a; 12b) which is intended to close at least one electrical area (14a; 14b) at least dust-tight and / or watertight, with a first electrical contact (16a; 16b) and at least one second electrical contact (18a; 18b) which are intended to transmit electrical operating energy and / or information, with at least one water film separating means (20a, 22a, 24a; 20b) which is intended to prevent the formation of a direct water film between the first contact (16a; 16b) and the second contact (18a; 18b) in at least one operating state, characterized by in that the battery device has at least one water drainage slot (32a; 32b) which is delimited by the water film separating means (20a; 20b), wherein the water drainage slot (32a; 32b) is designed such that water can drain from a region between the contacts into the battery receiving housing (82b). [2] Battery device according to claim 1, characterized by a housing part (26a, 28a; 26b) which at least partially forms the water film separating means (20a, 22a, 24a; 20b). [3] Battery device according to claim 1 or 2, characterized by that the water film separating agent (20a, 22a, 24a; 20b) is at least partially formed from a hydrophobic material. [4] Battery device according to one of the preceding claims, characterized by that the water film separating means (20a, 22a, 24a; 20b) is arranged between the first contact (16a; 16b), which transmits the electrical operating energy during operation, and the second contact (18a; 18b), which transmits information in at least one operating state. [5] Battery device according to claim 4, characterized by at least one third contact (30a; 30b) which transmits the electrical operating energy during operation. [6] Battery device according to claim 5, characterized bythat the second contact (18a; 18b) is arranged between the first contact (16a; 16b) and the third contact (30a; 30b). [7] Battery device according to one of the preceding claims, characterized by that the water film separating agent (22a, 24a) forms a partition wall. [8] Battery with a battery device (10a) according to one of the preceding claims. [9] Battery charger with a battery device (10b) according to one of claims 1 to 7. [10] A system comprising a battery (34a) according to claim 8 and a battery charger (36b) according to claim 9.

Images