Battery, in particular button cell, and method for its production

Abstract

Battery, in particular button cell, with an anode (13) and a cathode (11) and a separator (15) arranged therebetween and a housing consisting of a cup (5) and a lid (3) and an annular insulation and sealing layer (17) therebetween, wherein an electronic device (7) with at least one electronic component (9) is additionally arranged in the housing (3, 5) of the battery (1), wherein the electronic device (7) comprises, as an electronic component (9), a sensor device in the form of a motion or acceleration sensor, which is designed such that it triggers an action upon detection of a predefined event, the electronic device (7) comprises, as an electronic component (9), a switching device which is designed such that it causes the battery voltage to be switched off if no movement is detected by the movement or acceleration sensor over a predetermined period of time and / or the battery voltage is switched on via a detected movement or a detected predetermined movement pattern, the electronic device (7) is circular or annular and wherein at least one sensitive electronic component (9) is arranged in a ring shape on or in the electronic device (7) and is protected from the cathode (11) and / or the anode (13) by the ring-shaped insulation and sealing layer (17).

Description

The invention relates to a battery, in particular a coin cell, having an anode and a cathode, and a separator arranged therebetween, and to a method for producing such a battery.Such batteries are used in a large number of devices (remote controls of any kind, medical devices, measuring devices, etc.) in order to be able to use these devices in a battery-operated or battery-supported manner independently of the mains power supply. Moreover, such batteries are used to operate in non-autonomous devices (computers, smartphones, laptops, notebooks, etc.) The components of the electronics can be designed with battery support, for example, in order to supply standby circuits with power, to obtain volatile memory content or to bypass short-term mains power failures.In the sense of the invention, the term battery comprises both rechargeable and non-rechargeable energy stores, i.e. also so-called accumulators, which have substances in their interior, which can store and release energy due to a chemical reaction. The term battery is also understood in the sense of the invention to mean multicellular battery cells assembled in a housing, but in a preferred embodiment a single battery cell, in particular a conventional standardized design, such as, for example, mono, mignon, micro, mini, baby, lady, 9 V block and preferably different button cell types.So-called battery packs which contain a plurality of batteries can be clearly separated therefrom. Such battery packs, even if they are arranged in a common housing, are not to be understood as batteries within the meaning of the invention.In order to detect different properties of the battery, such as its state of charge, a corresponding measuring device must be provided in the device into which the battery is placed. If the first and / or repeated correct insertion of these batteries is to be detected, monitored or even documented in calibrated devices (e.g. measuring devices) or safety-relevant devices, such as medical devices, for example, suitable devices are required in these devices, which offer only conditional safety against fraud or abuse.From DE 11 2017 000 614 T5 a battery device to be mounted in a vehicle with a change of position detector in the interior of the battery pack is known. Further batteries are known from U.S. Pat. No. 2015 / 0 349 388 A1 and U.S. Pat. No. 2008 / 0 090 134 A1, DE 10 2015 002 149 A1, DE 10 2016 105 219 A1 and DE 11 2014 003 323 T5.The present invention is therefore based on the object of avoiding the above disadvantages and of providing a battery and a production method for such a battery which (s) increases the field of use of the battery and / or facilitates detection of the battery properties.This object is achieved according to the invention by a battery having the features of claim 1 and by a method having the features of claim 5.According to the invention, an electronic device with at least one electronic component is additionally arranged within a housing of a battery consisting of a cup and a cover. By accommodating the electronic device in the housing of the battery, the battery can carry out various tasks or actions independently or in conjunction with devices which are arranged outside the battery-in particular within devices into which the battery is inserted.The electronic device can comprise, for example, a preferably processor-controlled switching device which enables the battery voltage to be switched on and / or switched off. It is furthermore conceivable for the electronic device to comprise a sensor device (in particular with a movement or acceleration sensor), and / or a measuring device and / or a transmitting and / or receiving device and / or an evaluation unit and / or a storage unit.Thus, as an action according to the invention, for example, the battery voltage can be switched off if no movement is detected by means of a movement or acceleration sensor over a longer time, in particular a predefined time period. According to the invention, the battery voltage can also be switched on if necessary, for example via a detected movement or a detected predefined movement pattern or via a signal or data received by means of a receiving device.In addition, it is conceivable to store data received in the battery in a memory unit and / or detected actions such as movement, movement pattern, output of battery current, battery state, charging cycles (in the case of rechargeable batteries), etc. as a history.Examples of electronic components which are included individually or in any combination by the electronic device are memory, microprocessor or FPGA, switching transistors, sensors (in particular acceleration or motion sensors, humidity sensors).In a preferred embodiment of the invention, at least one of the components, in particular acid-sensitive components, is separated from the anode and / or the cathode in an acid-tight or even gas-tight manner by the insulation and sealing layer. This prevents an early defect of the respective component caused by an undesirable chemical reaction (e.g. oxidation), wherein the sealing is advantageously effected preferably by an insulation and sealing layer already present in the battery (between the cup and the cover of the battery).In an embodiment according to the invention, the electronic device is circular or annular, preferably with a diameter almost equal to the inside diameter of the cup of the battery housing. This facilitates the insertion and positioning during production, so that no additional (working) step is required, apart from the insertion of the electronic device, in comparison with the conventional production process.In an embodiment according to the invention, at least one sensitive electronic component (microprocessor, etc.) is arranged annularly on or in the electronic device and is separated from the cathode and / or the anode in a gas-tight manner by the annular insulation and sealing layer and is thus protected from chemically aggressive substances or materials. The annular arrangement advantageously makes it possible to use the annular insulation and sealing layer already present in the battery without substantial changes having to be made to this annular insulation and sealing layer, apart from a possible cutout.In a further advantageous embodiment of the invention, the electronic device is designed as a circular surface and has a contact surface, preferably an inner circle, to the cathode and a further contact surface, preferably a tab or nose, to the positive pole (cup) of the battery. Insofar as the contact surfaces contact chemically aggressive materials, they are preferably made of a corresponding resistant conductive material.As already explained above, the electronic device can comprise a switching device as an electronic component, which is designed in such a way that it brings about the switching on and off of the battery voltage, i.e. disconnects positive and / or negative pole and thus switches voltage-free (or potential-free).Furthermore, it is conceivable that the electronic device comprises a sensor device (in particular a movement or acceleration sensor) as an electronic component, and triggers an action, such as switching on and off the battery voltage, transmitting a predefined pattern (data signal), when a predefined event (e.g. movement or a movement pattern) is detected.In a particular embodiment of the invention, the electronic device comprises as electronic component a transmitting and / or receiving device, by means of which data can be transmitted and / or received via radio and / or modulation of the battery voltage and / or of the battery current. For example, data can be stored in the battery (in a storage device) in order to be able to subsequently lead to a proof (for example for purposes of quality assurance, calibration, guarantee) that the battery was inserted into the respective device.According to the invention, during the production of the battery, a round or ring-shaped electronic device is inserted into the cup as an additional and preferably sole further method step. This can be done in a first step before the introduction of the insulation and sealing layer, the introduction of further material for forming the cathode, the introduction of a separator, the introduction of further material or the provision of air holes for forming the anode and the insertion of the cover, so that only a slight and thus cost-effective change of the conventional production process is required.Further advantageous embodiments of the invention are evident from the dependent claims.The invention is explained in more detail below with reference to an embodiment shown in the drawing.In the drawing, the following are shown: FIG. 1 is a schematic broken longitudinal sectional view of a battery according to the invention with an electronic device; FIG. 2 and schematic perspective detailed view of an electronic device according to FIG. 1 as a detail, and FIG. 3 shows a schematic side view of an electronic device according to FIG. 2.FIG. 1 shows a battery 1 according to the invention by way of example in the form of a typical button cell having a housing, usually made of stainless steel, which comprises a cup 5 as the positive pole and a cover 3 as the negative pole of the battery 1.The battery 1, which is circular in plan view (x-y plane) or in cross section, has, like conventional batteries, two different elements which serve as reducing agent (anode 13: for example zinc or lithium) and oxidizing agent (cathode 11: for example mercury oxide, silver oxide or manganese oxide).The anode 13 contacts the cover and forms the technical negative pole. Below the anode 13, the cathode 11 is arranged, separated by a separator 15, which contacts the cup 5 and forms the technical positive pole of the battery 1.In contrast to a conventional battery, in the battery according to the invention, an electronic device 7, for example in the form of a round printed circuit board, is located below the separator 15, preferably at the bottom of the cup 5.The electronics device 7 has a plurality of (for example three, see also FIG. 3 ) contact springs 29 on its underside in order to contact the cup 5 and thus the positive pole of the battery 1.Of course, it is also conceivable that the electronic device 7 is not formed over the whole area. Thus, the electronics device 7 cannot also be placed directly on the bottom of the cup 5, but preferably only arranged within the insulation and sealing layer 17, wherein the cathode 11 or the cup 5 can then be contacted via a corresponding contact surface.As can be seen from FIG. 2, the electronics device 7 has on its upper side in the region of the cathode 11 an inner part or inner region 23 which is preferably circular-surface-shaped and is connected to the contact springs 29 directly or via a switching device, with the result that the cathode is connected, preferably over its entire cross section, to the positive pole of the battery directly (through-contacted) or via the switching device.On the preferably ring-shaped edge 21 of the electronic device 7, depending on the requirement, electronic components 9 are arranged in any combination, such as a microprocessor, a motion sensor, an electronic switching device, a storage device, an evaluation device, etc.The electronics device 7 has a projection in the form of a contact nose 25 with a contact surface 27 arranged in the end region in order to contact the anode 13 or directly the cover 3 and thus the negative pole of the battery 1.For this purpose, the contact nose can be bent upwards at right angles (in the z direction), for example, in order to contact a border of the cover 3 which usually extends downwards or the anode 13 arranged above the separator 15 (as seen in the z direction).The edge 21 of the electronic device 7 and thus components 9 arranged in this region are protected by the cathode 11 and anode 13 by the insulation and sealing layer 17, so that the components are contacted only via the electronic device 7 and are connected in the desired manner to the positive and negative poles of the battery via their connections. For this purpose, the edge 21 can be configured, for example, in the usual manner as a printed circuit board (possibly also in multiple layers) and can accordingly have conductor tracks.The contact nose 25 bent upwards is sealed by the insulation and sealing layer 17 (or insulation ring) in such a way that only the contact surface 27 is connected to the cover 3 or the anode 13. The edge 21 of the electronic device 7 remains separated from the cathode 11 and the anode by the insulation and sealing layer 17 and is thus protected from aggressive chemical reactions.In this way, the components 9 are supplied with current from the battery 1 in order to carry out their tasks, such as switching on and off the battery voltage.As can be seen from FIG. 1, the electronics device 7, in particular in the form of a circular printed circuit board, can be placed in a cup 5 during production, wherein the edge 21 is not only electrically insulated (apart from contact surface 27), but preferably also protected, with respect to the interior of the battery 1 and the usually chemically aggressive materials located therein, by the insulation and sealing layer 17, which is introduced subsequently or simultaneously.The electronic components 9 are located in the region of the encircling sealing ring or of the annularly formed insulation and sealing layer 17.Even if the invention has been explained above with reference to a round button cell, the invention naturally also comprises angular basic shapes of batteries or battery cells. The term ring-shaped is accordingly also to be understood as angular rings.List of reference characters1 Battery 3 Cover (pole of the battery) 5 Cup (+pole of the battery) 7 Electronic device in the form of a printed circuit board 9 Electronic components 11 Cathode 13 Anode 15 Separator 17 Insulation and sealing layer 21 Edge of the printed circuit board 23 Inner part of the printed circuit board / inner region 25 Contact nose 27 Contact surface 29 Contact springs

Claims

Battery, in particular button cell, having an anode (13) and a cathode (11), and a separator (15) arranged therebetween, and a housing which consists of a cup (5) and a cover (3) and an annular insulating and sealing layer (17) lying therebetween, wherein an electronic device (7) having at least one electronic component (9) is additionally arranged in the housing (3, 5) of the battery (1), wherein the electronic device (7) comprises, as an electronic component (9), a sensor device in the form of a movement or acceleration sensor which is designed in such a way that, when a predefined event is detected, it triggers an action, the electronic device (7) comprises, as an electronic component (9), a switching device which is designed in such a way that, as an action, it causes the battery voltage to be switched off, if no movement is detected by means of the movement or acceleration sensor over a predetermined period of time and / or the battery voltage is switched on by means of a detected movement or a detected predetermined movement pattern, the electronic device (7) is embodied in a circular or ring-shaped manner and wherein at least one sensitive electronic component (9) is arranged in a ring-shaped manner on or in the electronic device (7) and is protected from the cathode (11) and / or the anode (13) by the ring-shaped insulation and sealing layer (17).Battery according to Claim 1, characterized in that the at least one electronic component (9) of the electronic device (7) is separated from the anode (13) and / or the cathode (11) in an acid-tight manner by the insulation and sealing layer (17).Battery according to Claim 1 or 2, characterized in that the electronics device (7) is designed as a circular surface and has contact surfaces to the cathode (11) and positive pole of the battery.Battery according to one of the preceding claims, characterized in that the electronic device (7) comprises, as electronic component (9), a transmitting and / or receiving device, by means of which data can be transmitted and / or received via radio and / or modulation of the battery voltage and / or of the battery current.Method for producing a battery (1), in particular a button cell, according to one of the preceding claims, in which the circular or annular electronic device (7) is inserted into the housing (3, 5) of the battery (1) as a method step, wherein the sensor device in the form of a movement or acceleration sensor is arranged in the electronic device (7) as at least one electronic component (9), wherein at least one sensitive electronic component (9) is arranged annularly on or in the electronic device (7) and is protected from the cathode (11) and / or the anode (13) by the annular insulation and sealing layer (17).Method according to Claim 5, characterized in that the electronic device (7) is inserted into the cup (5) of the battery (1) before further method steps for forming the anode (13), the cathode (11) or the separator (15) take place.

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