Device and method for producing at least one electrode, in particular for a storage cell for storage of electrical energy

Abstract

The invention relates to a device (1) for producing electrodes, comprising a drying device (7) for drying a coating tape (3, 6) made of an active material applied to an electrically conductive foil (2), and comprising a receiving region (8) in which the electrically conductive foil (2) coated with the coating tape (3, 6) can be received at least temporarily. According to the invention, the drying device (7) has a plurality of outlet elements (10, 11) which can be supplied with heating gas and from which gas can be discharged, whereby the heating gas can act on the coating strip (3, 6) in order to dry the coating strip (3, 6). According to the invention, the drying device (7) has a distribution chamber (12, 13) which is common to the outflow element (10, 11) and through which the outflow element (10, 11) can be supplied with a gas and which can be supplied with a heating gas. The drying device (7) has a supply line (14, 15) through which the heating gas can flow, via which the distribution chamber (12, 13) can be supplied with the heating gas flowing through the supply line (14, 15).

Description

Technical Field

[0001] This invention relates to an apparatus for manufacturing at least one electrode, particularly an electrode for a storage battery cell, as described in the preamble of claim 1, wherein the storage battery cell is used to store, particularly electrochemically, electrical energy. Furthermore, this invention relates to a method for manufacturing at least one electrode, particularly an electrode for a storage battery cell, as described in the preamble of claim 6, wherein the storage battery cell is used to store, particularly electrochemically, electrical energy. Background Technology

[0002] DE102018200553A1 discloses an electrode device for a single battery cell. Furthermore, DE102015104439B4 discloses an electrochromic element. Additionally, JP6156398B2 discloses a method for manufacturing electrodes. Summary of the Invention

[0003] The object of the present invention is to provide an apparatus and a method that makes it particularly advantageous to manufacture electrodes, especially electrodes for storage cell batteries used to store, in particular, electrical energy electrochemically.

[0004] According to the present invention, the task is solved by a device having the features of claim 1 and a method having the features of claim 6. Advantageous embodiments of the present invention are the technical solutions described in the dependent claims.

[0005] The first aspect of the invention relates to an apparatus for manufacturing at least one electrode, particularly for at least one electrode of a storage battery cell, the storage battery cell being used to store, particularly electrochemically store, electrical energy. This means that the storage battery cell has electrodes in its fully manufactured state, wherein electrical energy is stored or has been stored by means of the storage battery cell or in the storage battery cell and here particularly by means of electrodes—particularly electrochemically. In particular, the storage battery cell can be a lithium-ion battery cell. It is particularly conceivable that the apparatus is designed or used for manufacturing storage battery cells.

[0006] The device has at least one drying unit, also referred to as a drying section or configured as such. The drying unit is configured to dry at least one coating strip made of an active material applied to a conductive foil, particularly a metallic conductive foil. This means that, for manufacturing electrodes, particularly electrodes for storage cells, the coating strip is applied to the conductive foil, such that the conductive foil is coated or has been coated by the coating strip. The coating strip is here composed of the active material. The device has at least one receiving area where the conductive foil, preferably a metallic conductive foil, coated with the coating strip and thus having the coating strip, can be received at least temporarily. This means that the conductive foil and the coating strip applied to the conductive foil can be received or held in the receiving area of ​​the device, at least temporarily, wherein the coating strip applied to the conductive foil can be dried or held in the receiving area by means of the drying unit, i.e., particularly while the conductive foil with the coating strip is arranged or held in the receiving area.

[0007] To enable the particularly advantageous manufacture of electrodes, especially electrodes for storage battery cells, according to the invention, the drying apparatus has a plurality of outflow elements, also referred to as outflowers, which are supplied with heating gas. The corresponding outflow elements are through which the heating gas flows in a corresponding flow direction. The corresponding outflow elements are also referred to as nozzles and / or can be configured as nozzles. The heating gas can be discharged from the outflow elements. This means that the corresponding outflow elements can provide heating gas, causing the gas to flow through the corresponding outflow element and exit from it, and particularly, preferably directly into the receiving area. By discharging or drawing the heating gas from the outflow elements, the heating gas can be used to apply action, particularly directly, on the coating strip to dry it. This means that the gas flowing out of the outflow elements and particularly, particularly, directly into the receiving area, can flow towards, particularly directly, the coating strip, so as to dry the coating strip, particularly during the period when the coating strip is arranged in the receiving area, and especially during the period when the coating strip and thus the conductive foil are guided through the receiving area.

[0008] The drying apparatus also has at least one distribution chamber shared with the outflow element and capable of being supplied with heating gas. This means that heating gas can be introduced into the distribution chamber, i.e., supplied to the distribution chamber. The heating gas can flow into the distribution chamber and then through the distribution chamber, and then from the distribution chamber to the outflow element, so that the gas is distributed or allocated to the outflow element by means of the distribution chamber. Thus, the distribution chamber is arranged upstream of the outflow element along the flow direction of the gas flowing through the distribution chamber and the outflow element. For example, the distribution chamber can be supplied with a total flow of heating gas, also referred to as the total flow, so that the total flow of heating gas can be introduced into the distribution chamber and thus supplied to the distribution chamber. Through or by means of the distribution chamber, for example, the total flow is distributed or allocated to the outflow element in such a way that the total flow is divided into sub-flows, wherein the corresponding outflow element can be through or be traversed by exactly one of the sub-flows. The sub-flows traversing each outflow element can flow out of the outflow element and into the receiving area, where they flow toward, in particular directly toward, the coating strip, so that the coating strip can be dried.

[0009] The drying apparatus also includes at least one supply line through which heating gas can flow, and a distribution chamber via which the heating gas flowing through the supply line can be supplied. Thus, for example, the main flow flows through the supply line and into the distribution chamber, such that the supply line is arranged upstream of the distribution chamber along the flow direction of the heating gas flowing through the supply line, distribution chamber, and outlet element. Consequently, the distribution chamber is arranged downstream of the supply line and upstream of the outlet element along the flow direction of the heating gas flowing through the supply line, distribution chamber, and outlet element. The distribution chamber is characterized, in particular, by having a larger flow cross-section for heating gas to flow through compared to the supply line and compared to the corresponding outlet element, for individual observation. Therefore, for example, if the supply line, distribution chamber, and outlet element form a main line through which heating gas can flow, the distribution chamber, for example, forms a partially enlarged cross-section, i.e., a partially enlarged cross-section for heating gas to flow through in the path of the heating gas from the supply line through the distribution chamber to the corresponding outlet element.

[0010] The device also includes at least one volumetric flow rate and / or mass flow rate sensor arranged in the supply line, which is also referred to as a first sensor. The first sensor can detect the volumetric flow rate and / or mass flow rate of the heated gas flowing through the supply line, wherein the volumetric flow rate and / or mass flow rate detectable by the first sensor is also referred to as a first measurement parameter. The device also includes at least one first temperature sensor, arranged in the supply line or distribution chamber, which is also referred to as a second sensor. The second sensor is preferably spaced apart from the first sensor. The second sensor can detect the temperature of the gas flowing through the supply line or distribution chamber. The temperature detectable by the second sensor, i.e., to be measured, is also referred to as a second measurement parameter. The device also includes at least one second temperature sensor, which enables non-contact detection of the surface temperature of the coated strip in the drying apparatus. The second temperature sensor is also referred to as a third sensor. The surface temperature of the coated strip detectable by the third sensor is also referred to as a third measurement parameter. The feature that the third sensor can detect, i.e., measure the temperature of the coated strip, in a non-contact manner should be understood as enabling non-contact detection of the surface temperature relative to the surface. In other words, the third sensor can detect or measure the surface temperature of the coating strip without contacting it. For example, the third sensor is configured as an infrared temperature sensor, particularly as an infrared thermometer (IR thermometer). The surface temperature of the coating strip is also referred to as the surface temperature. The third sensor is preferably spaced apart from the first and second sensors. The third sensor is preferably located at the end of the receiving area, particularly at the end of the entire drying unit.

[0011] The device also includes at least one pressure sensor, which is arranged in the supply line or distribution chamber and is also referred to as the fourth sensor. The pressure of the gas flowing through the supply line or distribution chamber can be detected by the fourth sensor, and this pressure is also referred to as the fourth measurement parameter. The fourth measurement parameter is, in particular, the absolute pressure of the gas flowing through the supply line or distribution chamber. The fourth sensor is preferably spaced apart from the first, second, and third sensors.

[0012] The device also includes at least one differential pressure sensor, also referred to as the fifth sensor. The fifth sensor detects, i.e. measures, the difference between a first pressure and a second pressure, also referred to as differential pressure or differential pressure value. The first pressure exists in the environment of the drying apparatus and therefore outside the drying apparatus, while the second pressure exists in the receiving area and therefore inside the drying apparatus. The difference between the first and second pressures is also referred to as the fifth measurement parameter. Generally, the sensor can detect, i.e. measure, the measurement parameter, especially during the drying of the coated strip in the receiving area. The drying of the coated strip is also referred to as drying or the drying process, wherein the device according to the invention enables monitoring of the drying process by detecting the measurement parameter during the drying process. This allows for online or in-line monitoring of the drying process, enabling the electrodes to be manufactured with particularly high quality and reliable process.

[0013] The sensor forms part of or is an integral part of the measurement technology, by which a measurement parameter can be detected, particularly during the drying process, i.e., while the coated strip is being dried in the drying apparatus. Thus, the measurement technology is also referred to as an online or in-line measurement technology. This invention is based on the understanding that, without such in-line measurement technology, the quality of the electrode and / or drying apparatus, i.e., at least one parameter characterizing the quality of the electrode and / or drying apparatus, can only be determined after the drying process, and especially only after the electrode has been manufactured. During electrode manufacturing, for example, a conductive foil, especially a metallic conductive foil, is unwound from a roll, also called a roll, and subsequently coated, i.e., provided with a coating strip composed of an active material, and then guided through the drying apparatus, especially through a receiving area, such that during the movement of the conductive foil and the coating strip applied to the conductive foil relative to the drying apparatus, especially a translational movement, and during this guidance through the receiving area, for example, the coating strip applied to the conductive foil is dried in and by means of the drying apparatus. Typically, the quality of the aforementioned drying apparatus and / or electrode can only be determined after the entire roll has been processed.

[0014] If a quality problem is identified at this point, the entire processed roll is considered scrap, which can lead to high scrap rates and thus high costs, especially in pilot or mass production lines used to manufacture electrodes. Therefore, monitoring of the drying process is desirable, and this can now be achieved through the present invention. By detecting, i.e., measuring parameters, such as the adhesion of the coating strip to the conductive foil during the drying process, quality characteristics can be monitored, particularly the adhesion of the coating strip to the conductive foil, which is especially advantageous in that the adhesion of the coating strip to the conductive foil is essentially formed during the drying process. The aforementioned measurement parameters have proven particularly advantageous here, as they enable particularly advantageous monitoring of the drying process and thereby ensure particularly high quality of the manufactured electrodes, and especially the drying process.

[0015] To enable particularly advantageous electrode manufacturing, one embodiment of the invention specifies that the drying apparatus has at least one heating element by means of which a gas can be heated. The heating element is preferably an electric heating element, which can be supplied with or be powered by electricity to heat the gas thereby. This allows, for example, targeted adjustment of the gas temperature. Air is preferably used as the gas to avoid undesirable effects on the coating strip.

[0016] Another embodiment is characterized in that the drying apparatus has at least one third temperature sensor as a sixth sensor, by means of which the temperature of the heating element itself can be detected. The temperature detectable by the sixth sensor is also referred to as the sixth measurement parameter, which can be detected, i.e., measured, by means of the sixth sensor. This allows for particularly advantageous monitoring of the drying process, ensuring particularly high quality of the drying process itself and the manufactured electrodes. Excessive waste can thus be avoided.

[0017] In another particularly advantageous embodiment of the invention, the drying apparatus has at least one discharge path through which the gas can be discharged from the coating strip and from the receiving area after the gas has been applied to the coating strip. If the gas is air, the gas flowing through the discharge path is also referred to as exhaust gas. The apparatus here has at least one second volumetric flow rate and / or mass flow rate sensor as a seventh sensor, which is arranged in the discharge path and can detect the volumetric flow rate and / or mass flow rate of the gas flowing through the discharge path. The volumetric flow rate and / or mass flow rate of the gas detectable by the seventh sensor is also referred to as a seventh measurement parameter, which can be detected, i.e., measured, by means of the seventh sensor. This allows for particularly advantageous monitoring of the drying process, ensuring particularly high quality of the drying process and the electrodes.

[0018] Another embodiment features a conveying device by which a conductive foil coated with a coating strip can move, particularly translate, through a receiving area and thereby be guided through the receiving area. The coating strip applied to the conductive foil and the conductive foil with the coating strip, in the state where the coating strip is applied to the conductive foil, form a composite, also known as an electrode composite. The coating strip of the composite is dried or is dried in the receiving area by means of a drying device. Thus, while the composite is in the receiving area, particularly during the movement of the composite through the receiving area and thus through the drying device, the coating strip is dried by means of gas in the receiving area and therefore in the drying device. Therefore, the conveying device is configured to move, particularly translate, the composite relative to the drying device, and thereby guide the composite through the receiving area, during which the coating strip of the composite is dried by means of gas, such that the coating strip of the composite—particularly directly—is acted upon by the gas supplied from the outflow element, i.e., flows. Thus, the electrode can be reliably manufactured with high quality and a special process.

[0019] The second aspect of the invention relates to a method for manufacturing at least one electrode, particularly using the apparatus according to the first aspect of the invention. In the method according to the second aspect of the invention, at least one coated strip made of an active material is applied to at least one conductive foil, particularly a metal, whereby the conductive foil is provided with, i.e., coated with, the coated strip. In the method according to the second aspect of the invention, the conductive foil with the coated strip is provided to a receiving area of ​​a drying apparatus, by means of which the coated strip is dried in the receiving area. This means that in the method, the coated strip is dried by means of a drying apparatus while the coated strip applied to the conductive foil, and thus the conductive foil, is in the receiving area, particularly during movement through and thus guided through the receiving area. In the method according to the second aspect of the invention, the electrode is manufactured from the conductive foil with the coated strip dried by means of a drying section. In other words, as already described with respect to the first aspect of the invention, the coated strip applied to the conductive foil and the conductive foil with the coated strip together form a composite, also referred to as an electrode composite, the coated strip of which is dried in the receiving area by means of a drying apparatus. After the coated strip is dried, the at least one electrode is manufactured from the composite.

[0020] To avoid excessive scrap in electrode manufacturing and thus avoid excessive costs, and to reliably manufacture electrodes with high-quality processes, a second aspect of the invention specifies that the drying apparatus has multiple outflow elements supplied with and traversed by heating gas, particularly along corresponding flow directions. The flow directions of the outflow elements are preferably parallel to each other. Through the flow of heating gas through each outflow element, the heating gas flows out of the outflow element and into, particularly directly into, a receiving area, thereby drying the coating strip, which is acted upon by the heating gas, particularly directly. This should be understood in particular as the heating gas flowing from the outflow element towards, particularly directly towards, the coating strip.

[0021] The device also includes at least one distribution chamber shared with an outflow element, through which heated gas is supplied and flows. The heated gas is supplied to the outflow element via the distribution chamber, particularly distributed to the outflow element. The drying apparatus also includes at least one supply line through which heated gas flows, and the heated gas is supplied to the distribution chamber, i.e., introduced into the distribution chamber. Thus, the distribution chamber is supplied with heated gas via the supply line.

[0022] During the drying of the coated strip in the receiving area using a drying device, in order to advantageously monitor the drying process of the coated strip, the device has at least one volumetric flow rate and / or mass flow rate sensor arranged in the supply line, which detects the volumetric flow rate and / or mass flow rate of the heated gas flowing through the supply line during the drying of the coated strip. The device also has at least one first temperature sensor arranged in the supply line or distribution chamber, which detects the temperature of the gas flowing through the supply line or distribution chamber during the drying of the coated strip. The device also has at least one second temperature sensor, which detects the surface temperature of the coated strip in a non-contact manner in the drying device during the drying of the coated strip. The device also has at least one pressure sensor arranged in the supply line or distribution chamber, which detects the pressure, particularly configured as absolute pressure, of the gas flowing through the supply line or distribution chamber during the drying of the coated strip. Furthermore, the device according to the second aspect of the invention has at least one differential pressure sensor, by means of which the difference between a first pressure and a second pressure is detected during the drying of the coated strip. The first pressure exists in the environment of the drying apparatus and therefore outside the drying apparatus, while the second pressure exists in the receiving area and therefore inside the drying apparatus. The advantages and advantageous designs of the first aspect of the invention should be considered as advantages and advantageous designs of the second aspect of the invention, and vice versa.

[0023] In order to manufacture electrodes with particularly high quality, time-saving and low cost, in one embodiment of the second aspect of the invention, it is specified that during the drying of the coating strip by means of a drying device, the conductive foil with the coating strip, i.e. the composite, is guided through the receiving area by means of a conveying device and thereby guided through the drying device. Attached Figure Description

[0024] Further details of the invention will emerge from the subsequent description of preferred embodiments and accompanying drawings. Among them, the only... Figure 1 A schematic and sectional side view of an apparatus for manufacturing at least one electrode, particularly for storing electrical energy in a battery cell, is partially shown. Detailed Implementation

[0025] Figure 1 An apparatus 1 for manufacturing at least one electrode, particularly for at least one electrode for a storage cell, is shown in part in a schematic side view. The storage cell is used to store, particularly electrochemically, electrical energy. Furthermore, the following is based on… Figure 1 A method for manufacturing an electrode is described. This electrode is particularly used after its manufacture in or within the storage battery cell, wherein electrical energy can be stored, particularly electrochemically, by means of the storage battery cell. For example, the storage battery cell is a lithium-ion battery cell. In this method, and for example using device 1, at least one coating strip 3 made of an active material is applied to a conductive foil 2 of at least one preferred metal, such that the conductive foil 2 is provided with, i.e., coated with, the coating strip 3 and therefore provided with, i.e., coated with, the active material. Figure 1 In the illustrated embodiment, particularly with the aid of device 1, a coating strip 3 made of an active material is applied to the first surface 4 of the conductive foil 2, such that surface 4 is provided with, i.e., coated with, the coating strip 3. Furthermore, for example in this method and particularly with the aid of device 1, a second coating strip 6 made of an active material is applied to the second surface 5 of the conductive foil 2 opposite to surface 4, such that, for example, surface 5 is coated with, i.e. provided with, the coating strip 6, and therefore coated with, i.e. provided with, the active material.

[0026] Equipment 1 has a drying device 7, also known as a dryer or drying section. For example, the conductive foil 2 is coated using the coating device of equipment 1—also known as a coater—and... Figure 1 Not shown in the diagram—but with coating strips 3 and 6, especially in the conductive foil 2 by means of... Figure 1 The conveying device, not shown, moves relative to the coater, particularly in a translational manner, and thus moves through, i.e., guides through, the coater.

[0027] from Figure 1It can be seen that the drying device 7 has a receiving area 8, where the conductive foil 2 coated with the coating strips 3 and 6 can be received, at least temporarily, for drying the coating strips 3 and 6. In this method, the conductive foil 2 with the coating strips 3 and 6 is provided to the receiving area 8, and in this method, while the coating strips 3 and 6 applied to the conductive foil 2 are arranged in the receiving area 8, especially while being guided through the receiving area 8, the coating strips 3 and 6 applied to the conductive foil 2—which are arranged on the opposing surfaces 4 and 5 of the conductive foil 2 and thus on the opposing sides of the conductive foil 2—are dried by means of the drying device 7. This means that the coating strips 3 and 6 applied to the conductive foil 2 and the conductive foil 2 form a composite, also known as an electrode composite, which moves relative to the drying device 7, especially translationally, in the direction of movement indicated by arrow 9 by means of a conveying device and thus moves through, i.e., guided through, the receiving area 8 along the conveying direction, during which the coating strips 3 and 6 of the composite are dried by means of the drying device 7.

[0028] The device 1 may, for example, have multiple drying units 7, also referred to as drying sections. Multiple first drying sections are arranged sequentially and therefore successively, for example, along the conveying direction indicated by arrow 9, particularly by forming first drying lines. Multiple second drying sections may, for example, be arranged sequentially and therefore successively, particularly for forming second drying lines through which a second composite may be guided, thereby drying the coating strip of the second composite, during which the second composite is guided through the second drying line. This allows for the production of a high quantity of electrodes in a time- and cost-effective manner. The foregoing and subsequent descriptions of the drying units 7 can also be readily applied to other drying sections and vice versa.

[0029] After the coating strips 3 and 6 of the composite have been dried, at least one electrode is manufactured from the composite, i.e. from the conductive foil 2 provided with the coating strips 3 and 6 dried by means of the drying device 7.

[0030] To enable particularly advantageous electrode manufacturing, the drying apparatus 7 has a first outflow element 10 and a second outflow element 11, which are supplied with heated air as heating gas and are traversed by the heated air, particularly along their respective flow directions, which extend, for example, perpendicular to the conveying direction. The heated air flows through and exits from the respective outflow elements 10 and 11 along the flow direction, i.e., is discharged. The respective outflow elements 10 and 11 are also referred to as outflowers. The heated air exiting from the outflowers flows into, particularly directly into, the receiving area 8, so that the heated air exiting from the outflowers flows directly to the coating strips 3 and 6 and thus directly acts on the coating strips. The coating strips 3 and 6 are dried by acting on them with the heated air exiting from the outflowers. It can be seen that the surfaces 4 and 5, and therefore the sides of the conductive foil 2, point away from each other along a direction perpendicular to the conveying direction, wherein the corresponding flow directions are aligned with said directions. Here, each outflow element 10 forms a first outflow group, and each outflow element 11 forms a second outflow group, wherein the outflow groups are positioned opposite each other along the stated direction, and wherein the composite is guided through the outflow groups along the conveying direction, during which the coating belts 3 and 6 are dried by means of heated air. Furthermore, it can be seen that the flow direction of the heated air from the respective outflow element 10 is opposite to the flow direction of the heated air from the respective outflow element 11.

[0031] The drying apparatus 7 has a first distribution chamber 12 shared with the outflow element 10 and a second distribution chamber 13 shared with the outflow element 11. The respective distribution chambers 12 and 13 are supplied with heated air and through which heated air flows. The heated air is supplied to the outflow element 10 via distribution chamber 12 and to the outflow element 11 via distribution chamber 13, such that, for example, the heated air is distributed to the outflow element 10 via distribution chamber 12 and by means of the distribution chamber, and to the outflow element 11 via distribution chamber 13 and by means of the distribution chamber. Furthermore, the drying apparatus 7 has a first supply line 14 through which heated gas flows, the heated gas being supplied to the distribution chamber 12 via the first supply line 14, i.e., introduced into the distribution chamber 12, thereby supplying the distribution chamber with heated gas via the supply line 14. Furthermore, the drying apparatus 7 has a second supply line 15 associated with the distribution chamber 13, through which heated air flows. This heated air is supplied to the distribution chamber 13 via the second supply line 15, i.e., introduced into the distribution chamber 13. Therefore, the distribution chamber 13 is supplied with heated air via the supply line 15. Additionally, the drying apparatus 7 has, for example, a supply line 16 shared by supply lines 14 and 15, through which heated gas flows. Heated gas is supplied to supply lines 14 and 15 via the supply line 16, and is thus introduced into supply lines 14 and 15 via the supply line 16. The airflow is indicated by arrow 17.

[0032] The drying apparatus 7 has a first volumetric flow sensor 18 arranged in the supply line 14, which detects (i.e. measures) the volumetric flow rate of the heated air flowing through the supply line 14 during the drying of the coating strips 3 and 6 and during the guiding of the composite through the receiving area 8. Furthermore, the drying apparatus 7 has a second volumetric flow sensor 19 arranged in the supply line 15, which detects (i.e. measures) the volumetric flow rate of the heated air flowing through the supply line 15 during the drying of the coating strips 3 and 6. Additionally, the drying apparatus 7 has, for example, a first temperature sensor 20 arranged in the supply line 14, downstream of the volumetric flow sensor 18 along the flow direction of the heated gas (heated air) flowing through the supply line 14. The temperature of the heated air flowing through the supply line 14 is detected by the temperature sensor 20 during the drying of the coating strips 3 and 6. Furthermore, the drying device 7 has a second temperature sensor 21, which, in the drying device 7, detects the temperature of the surface 22 of the coating strip 3 in a non-contact manner during the drying of the coating strips 3 and 6. For this purpose, the temperature sensor 21 is configured, for example, as an infrared thermometer. It can be seen that the temperature sensor 21 is arranged, for example, in the receiving area 8. In addition, the drying device 7 has a pressure sensor 23 arranged in the supply line 14, which, in the presence of the pressure, particularly the absolute pressure, of the heated air flowing through the supply line 14 during the drying of the coating strips 3 and 6. Furthermore, the drying device 7 has a first differential pressure sensor 24, which, in the presence of the first pressure existing in the environment 30 and therefore outside the drying device 7, detects (i.e., measures) the difference between the second pressure existing in the receiving area 8 and the first differential pressure existing in the environment 30 and therefore outside the drying device 7 during the drying of the coating strips 3 and 6.

[0033] exist Figure 1 In the embodiment shown, the drying device 7 also has a second differential pressure sensor 25, which detects the difference between a third pressure present in the environment 30 and a fourth pressure present in the receiving area 8 during the drying of the coating strips 3 and 6.

[0034] exist Figure 1In the illustrated embodiment, the drying apparatus 7 also includes a third temperature sensor 26. Multiple, and therefore at least two or exactly two, temperature sensors 26 may be provided, arranged sequentially and particularly spaced apart from each other, for example, along an arrangement direction. The arrangement direction is preferably perpendicular to the conveying direction and extends in a plane extending in the conveying direction, which, for example, relates to the plane extending from the conductive foil 2. Thus, the arrangement direction extends, for example, perpendicular to the flow direction. The conductive foil 2, particularly the composite, particularly has a width extending along the arrangement direction, such that the temperature sensors 26 are distributed, for example, across a width also referred to as the bandwidth. With the aid of the temperature sensors 26, during the drying of the coated strips 3 and 6, the temperature is detected (i.e., measured), particularly in a non-contact manner, especially in the receiving area 8 and / or surface 22.

[0035] As indicated by arrow 27, after the air has dried the coating strips 3 and 6, the air flows away from the coating strips 3 and 6 and exits, for example, from the receiving area 8, so that after the coating strips 3 and 6 are acted upon with heated air, the air flows away from the coating strips 3 and 6. This is indicated by arrow 27. An exhaust path, indicated by arrow 27, is provided here, through which the air is exhausted from the coating strips 3 and 6, and particularly from the receiving area 8, after the coating strips 3 and 6 are acted upon with air. Here, for example, at least one volumetric flow rate and / or mass flow rate sensor is arranged in the exhaust path, by means of which the volumetric flow rate and / or mass flow rate of the air flowing through the exhaust path is detected, particularly during the drying of the coating strips 3 and 6.

[0036] The drying apparatus 7 also includes a heating element 28, particularly an electric heating element, which is arranged, for example, in the supply line 16. The air is heated by means of the heating element 28. Here, for example, a temperature sensor 29 is provided, which detects, i.e. measures, the temperature of the heating element 28, especially during the drying of the coating belts 3 and 6 and especially during the heating of the air by means of the heating element 28.

[0037] The temperature, volumetric flow rate, and differential pressure, as well as the pressure, are measurement parameters measured during the drying of coating strips 3 and 6 and during the guidance of the composite through receiving region 8. The drying of coating strips 3 and 6 is also referred to as the drying process. Preferably, the electrodes are manufactured according to the measurement parameters. In particular, the drying process is performed according to the measurement parameters. Exactly exemplarily, the composite is guided through receiving region 8 according to the measurement parameters.

[0038] List of reference numerals

[0039] 1 device

[0040] 2 conductive foils

[0041] 3-coating strip

[0042] 4 surfaces

[0043] 5 surfaces

[0044] 6-coating strip

[0045] 7. Drying device

[0046] 8 Acceptance Area

[0047] 9 arrows

[0048] 10 outflow elements

[0049] 11 outflow elements

[0050] 12 Distribution Room

[0051] 13 Distribution Room

[0052] 14 supply pipelines

[0053] 15 supply pipelines

[0054] 16 supply pipelines

[0055] 17 arrows

[0056] 18 volumetric flow sensors

[0057] 19 Volumetric Flow Sensor

[0058] 20 temperature sensors

[0059] 21 Temperature Sensor

[0060] 22 surface

[0061] 23 Pressure Sensors

[0062] 24 Differential Pressure Sensor

[0063] 25 Differential Pressure Sensor

[0064] 26 Temperature Sensors

[0065] 27 arrows

[0066] 28 heating elements

[0067] 29 Temperature Sensors

[0068] 30 Environment

Claims

1. An apparatus (1) for manufacturing at least one electrode, the apparatus having at least one drying device (7) for drying at least one coated strip (3, 6) made of an active material applied to a conductive foil (2), and the apparatus having at least one receiving area (8) in which the conductive foil (2) coated with the coated strip (3, 6) can be received at least temporarily for drying the coated strip (3, 6). Its features are, The drying device (7) has: - Multiple outlet elements (10, 11) that can be supplied with heated gas can discharge gas from these outlet elements, thereby allowing the heated gas to act on the coating strip (3, 6) for drying the coating strip (3, 6). - At least one distribution chamber (12, 13) shared with the outflow elements (10, 11) and through which heating gas can be supplied; - At least one supply line (14, 15) through which heated gas can flow, and the distribution chamber (12, 13) can be supplied with heated gas flowing through the supply line (14, 15) through the supply line; - At least one volumetric flow rate and / or mass flow rate sensor (18, 19) arranged in the supply line (14, 15) can detect the volumetric flow rate and / or mass flow rate of the heating gas flowing through the supply line (14, 15). - At least one first temperature sensor (20) is arranged in the supply line (14, 15) or the distribution chamber (12, 13), by means of which the temperature of the gas flowing through the supply line (14, 15) or the distribution chamber (12, 13) can be detected; - At least one second temperature sensor (21) is used to detect the temperature of the surface (22) of the coating strips (3, 6) in a non-contact manner in the drying device (7); - At least one pressure sensor (23) arranged in the supply line (14, 15) or the distribution chamber (12, 13), by means of which the pressure of the gas flowing through the supply line (14, 15) or the distribution chamber (12, 13) can be detected; and - At least one differential pressure sensor (24, 25) can detect the difference between a first pressure present in the environment (30) of the drying device (7) and a second pressure present in the receiving area (8).

2. The device (1) according to claim 1. Its features are, The drying device (7) has at least one heating element (28) by means of which the gas can be heated.

3. The device (1) according to claim 2. Its features are, The drying device (7) has at least one third temperature sensor (29) which can detect the temperature of the heating element (28).

4. The device (1) according to any one of the preceding claims. Its features are, The drying device (7) has: - At least one discharge path (27) through which gas can be discharged from the coating strip (3, 6) and from the receiving area (8) after the coating strip (3, 6) has been acted upon with gas; as well as - At least one second volumetric flow rate and / or mass flow rate sensor is arranged in the discharge path (27), by means of which the volumetric flow rate and / or mass flow rate of the gas flowing through the discharge path (27) can be detected.

5. The device (1) according to any one of the preceding claims. Its features are, The conveying device guides the conductive foil (2) coated with the coating strips (3, 6) through the receiving area (8).

6. A method for manufacturing at least one electrode, wherein: - Apply at least one coating strip (3, 6) made of active material to at least one conductive foil (2); - A conductive foil (2) with coated strips (3, 6) is provided to the receiving area (8) of a drying device (7), and the coated strips (3, 6) are dried in the receiving area (8) by means of the drying device; and - The electrode is made of conductive foil (2) having a coated strip (3, 6) that has been dried by means of a drying device (7); Its features are, The drying device (7) has: - Multiple outflow elements (10, 11) are supplied with and pass through heated gas, which flows out of the outflow elements (10, 11), thereby applying the heated gas to the coating strips (3, 6) for drying the coating strips (3, 6). - At least one distribution chamber (12, 13) shared with the outflow element (10, 11), the distribution chamber being supplied with heated gas and through which heated gas is supplied to the outflow element (10, 11) via the distribution chamber (12, 13). - At least one supply line (14, 15) through which heated gas flows, and the heated gas is supplied to the distribution chamber (12, 13) via the supply line (14, 15). - At least one volumetric flow rate and / or mass flow rate sensor (18, 19) arranged in the supply line (14, 15) is used to detect the volumetric flow rate and / or mass flow rate of the heating gas flowing through the supply line (14, 15) during the drying of the coating belt (3, 6). - At least one first temperature sensor (20) arranged in the supply line (14, 15) or the distribution chamber (12, 13) to detect the temperature of the gas flowing through the supply line (14, 15) or the distribution chamber (12, 13) during the drying of the coating belt (3, 6); - At least one second temperature sensor (21) is used to detect the temperature of the surface (22) of the coating belt (3, 6) in a non-contact manner during the drying of the coating belt (3, 6) in the drying apparatus (7); - At least one pressure sensor (23) arranged in the supply line (14, 15) or the distribution chamber (12, 13), by means of which the pressure of the gas flowing through the supply line (14, 15) or the distribution chamber (12, 13) is detected during the drying of the coating belt (3, 6); and - At least one differential pressure sensor (24, 25) is used to detect the difference between a first pressure present in the environment (30) of the drying apparatus (7) and a second pressure present in the receiving area (8) during the drying of the coating belt (3, 6).

7. The method according to claim 6, Its features are, The conductive foil (2) with coating belts (3, 6) is guided through the receiving area (8) by means of a conveying device and thereby through the drying device (7), during which the coating belts (3, 6) are dried by means of the drying device (7).

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