Production method and production device for producing a component for a battery cell of an energy storage device

Abstract

The disclosure relates, inter alia, to a production method for producing a component, in particular an electrode, for a battery cell of an energy storage device, in particular a drive battery for a motor vehicle, wherein the component has a carrier web and a coating applied to the carrier web, the method comprising: - providing the carrier web and at least one slurry material for the coating, - supplying the at least one slurry material to an application tool for applying the coating, - applying the at least one slurry material as a coating to the carrier web by means of the application tool, wherein a volume flow and a density of the at least one slurry material are measured during supply to the application tool and a mass flow of the at least one slurry material is ascertained on the basis of the volume flow and the density, wherein the mass flow of the at least one slurry material is controlled to a predetermined set mass flow by means of the volume flow.

Description

[0001] 23-3490

[0002] 1

[0003] Manufacturing process and manufacturing apparatus for producing a component for a battery cell of an energy storage device

[0004] The present disclosure relates to a manufacturing process for producing a component, in particular an electrode, for a battery cell of an energy storage device, in particular a traction battery for a motor vehicle, wherein the component comprises a carrier track and a coating applied to the carrier track. The present disclosure further relates to a manufacturing apparatus for producing a component, in particular an electrode, for a battery cell of an energy storage device, in particular a traction battery for a motor vehicle, wherein the component comprises a carrier track and a coating applied to the carrier track.

[0005] Such an energy storage device typically comprises a plurality of battery cells connected in parallel and / or series, thus forming a high-voltage storage device for the motor vehicle, also known as a traction battery or drive battery. The energy storage device is specifically designed to discharge the battery cells and provide electrical energy to operate the motor vehicle. In particular, the energy storage device is designed to charge its battery cells by supplying them with electrical energy through recuperation during driving and / or by providing electrical energy externally, for example via a charging station, to charge the battery cells of the energy storage device.

[0006] Each battery cell has one electrode configured as an anode and one as a cathode. The production of such a battery cell can be divided into three main process steps: electrode manufacturing, cell assembly, and cell finalization, including cell activation or formation.

[0007] In electrode manufacturing, a so-called "slurry" or "slurry material" is first produced, comprising one or more active materials and optionally additives such as solvents and / or binders. The slurry material is applied as part of a subsequent coating onto a carrier, preferably metallic, substrate. A carrier is also referred to as a carrier film. A coating, for example, has a layer of 23-3490

[0008] 2 a slurry material or has at least two layers, in particular made from different slurry materials.

[0009] After coating, the carrier film is dried, for example in a drying tunnel. By applying heat, solvents are removed from the coating, leaving the solid components of the slurry material on the carrier film.

[0010] Strict requirements apply to the properties of the coatings during production, including chemical composition, thickness, and basis weight. Deviations can affect the performance and durability of the components, particularly the electrodes. To meet requirements such as fast-charging capability and / or capacity, predetermined specifications must be adhered to. Tolerances are typically tight.

[0011] To achieve a specified basis weight for a layer of a coating, the layer can be applied and dried individually, and the basis weight then checked. Such calibration allows conclusions to be drawn about the basis weight of the layer and / or the coating during the manufacturing process. This calibration can be performed individually for several layers.

[0012] Typically, when manufacturing a multi-layered coating, the coating process is carried out simultaneously. Therefore, verifying the basis weight after manufacturing is only possible for the entire coating, especially one comprising multiple layers. Such basis weight measurements are performed, for example, using ultrasonic absorption, X-rays, or microwave radiation. Offline basis weight measurement using a scale is also possible.

[0013] WO 2004 / 035929 A1 discloses a method for producing a multilayer coated substrate with improved battery properties. This involves a curtain coating process in which a multilayer curtain is applied to a paper mesh.

[0014] DE 10 2011 084 996 A1 discloses an arrangement for coating a substrate with an organic coating material, comprising, among other things, at least one heat source for evaporating the organic coating material. 23-3490

[0015] 3

[0016] WO 2016 / 170229 A1 discloses a method and a system for producing coated cardboard as well as coated cardboard.

[0017] In light of this prior art, one objective of the present disclosure is to specify a manufacturing device and a manufacturing process, each of which is suitable for enriching the prior art and improving at least the aforementioned aspects of the prior art. In particular, the objective of the disclosure is to specify a manufacturing device and a manufacturing process by means of which the basis weight of at least one layer can be determined and / or adjusted during the production of a coating.

[0018] The problem is solved by the features of the independent claims. The dependent claims contain further developments of the disclosure.

[0019] The problem is then solved according to one aspect of the disclosure by a manufacturing process for producing a component, in particular an electrode, for a battery cell of an energy storage device, in particular a traction battery for a motor vehicle, wherein the component has a carrier track and a coating applied to the carrier track, wherein the process comprises:

[0020] - Providing the carrier web and at least one slurry material for coating,

[0021] - Feeding the at least one slurry material to an application tool for applying the coating,

[0022] - Application of the at least one slurry material as a coating onto the carrier web using the application tool, wherein a volume flow rate and a density of the at least one slurry material are measured when feeding it to the application tool, and a mass flow rate of the at least one slurry material is determined as a function of the volume flow rate and the density, wherein the mass flow rate of the at least one slurry material is regulated to a predetermined setting mass flow rate by means of the volume flow rate.

[0023] The above can be summarized in other words, and with reference to a specific embodiment that is described as not limiting to the present disclosure, as follows: When a slurry material is fed to an application tool, both the volume flow rate and the density of the slurry material are measured. By multiplying the density [kg / m³] 3 ] and volume flow [m³ 3[ / s] is one way to determine a liquid mass flow rate in the unit [kg / s]. 23-3490

[0024] 4

[0025] The underlying principle of the disclosure is that the properties of different batches of slurry material can differ despite nominally identical composition. For example, different production batches from the same manufacturer may exhibit varying properties, particularly differences in the solids content of the slurry material. Furthermore, production conditions such as varying temperatures during production, storage durations of the slurry material, and / or extraction from different locations within a slurry reservoir can lead to different densities. If, during production, the volumetric flow rate of the slurry material is kept constant after calibration to a predetermined volumetric flow rate, a change in the density of the slurry material during production will alter the mass flow rate and thus the basis weight of the respective coating layer.Therefore, in the context of this disclosure, it is envisaged to measure the density of the slurry material as it is fed to an application tool and to control the feed rate of the slurry material as a function of a determined mass flow rate, in particular as a function of a determined solids content of the respective slurry material. The density can thus be considered relevant for determining the solids content and, consequently, a "solids mass flow rate." This enables the precise production of coatings with minimal deviations from a predetermined mass flow rate and / or basis weight. This results in the cost-effective and efficient production of components, especially electrodes, for battery cells with low reject rates and high quality.

[0026] The manufacturing process is intended for producing a component, in particular an electrode, a separator, a solid electrolyte, a freestanding film and / or layers, for a battery cell of an energy storage device. In particular, the energy storage device is intended to be a secondary battery and / or for a motor vehicle. Optionally, a battery cell is a lithium-ion battery cell.

[0027] In particular, the at least one slurry material is liquid and is applied to the carrier web in liquid form. Preferably, the at least one slurry material comprises at least one active material, conductive carbon black, solvent, binder, and one or more additives. Particularly when a conductive active material is used, conductive carbon black may be omitted. The at least one slurry material is applied to the carrier web continuously or intermittently. Preferably, several slurry materials are applied to a carrier web simultaneously for multiple layers of a coating. Optionally, after applying the at least one slurry material as a coating to the carrier web using the application tool, the carrier web is coated with the coating, particularly in a 23-3490

[0028] 5

[0029] The drying process takes place in a drying tunnel. During this process, the solvent is removed from the coating by the application of heat.

[0030] Optionally, the coating comprises at least two layers, each consisting of a different slurry material. During feeding to the application tool, the volumetric flow rate and density of each slurry material are measured. Based on these volumetric flow rates and densities, a corresponding mass flow rate is determined for each slurry material. This mass flow rate is then regulated to a predetermined setting mass flow rate. This enables the production of a coating with at least two layers, where the mass flow rate is determined and regulated to a setting mass flow rate for each layer during production.In particular, a predetermined basis weight of the coating layers is ensured during production.

[0031] Optionally, at least one slurry material is fed to the application tool by means of a slurry material pump, the pump being operated at a specific speed. In particular, the flow rate of at least one slurry material is determined by means of the pump speed and / or a flow sensor arranged in a supply line to the application tool, and / or the flow rate of at least one slurry material is adjusted by means of the pump speed. A constant flow rate can be easily ensured by means of a slurry material pump and a specific pump speed. A flow sensor is arranged, in particular, directly upstream of an application tool. A separate flow sensor enables, for example, a precise determination of the flow rate of the respective slurry material.

[0032] In one embodiment, the volumetric flow rate and / or density of the at least one slurry material is measured directly upstream of the application tool. This allows for a precise measurement of the respective parameters.

[0033] Optionally, the respective predetermined settling mass flow is either a liquid mass flow of the at least one slurry material during the introduction of the at least one slurry material, or a solid mass flow of the at least one slurry material after drying a liquid portion of the respective slurry material. Depending on the technical requirements, this allows for a 23-3490

[0034] 6

[0035] Rules on a setting mass flow of the supplied slurry material to the application tool or on a setting mass flow of the dried slurry material in the coating.

[0036] A liquid mass flow rate is determined by multiplying the density and volumetric flow rate of a slurry material. A solid mass flow rate is determined by multiplying the liquid mass flow rate by the solid content of the respective slurry material. Specifically, a solid mass flow rate is determined by multiplying the density by the volumetric flow rate and the solid content. The solid content describes the weight fraction of solids in the slurry material, particularly as a percentage, and is also referred to as "solid content" (SC).

[0037] Optionally, depending on the relationship between density and solids content of a given slurry material, a liquid mass flow rate of at least one slurry material is converted into a solids mass flow rate. In a further, and especially a first, process step, the relationship between density and solids content of a given slurry material is determined. This enables precise control of the solids mass flow rate as the settling mass flow rate. The relationship between density and solids content is established, in particular, by means of a predetermined functional relationship and / or by means of calibration as a first process step. In one embodiment, the solids content of the respective slurry material is determined based on a measured density using the relationship between density and solids content.

[0038] Optionally, the respective predetermined mass flow rate is determined from a predetermined basis weight of the respective coating layer after drying a liquid component of the respective coating. This allows the manufacturing process to be controlled to a specific basis weight, where basis weight is a common value for characterizing the coating layers. Specifically, the basis weight is the dry basis weight after solvent removal, particularly by drying. A liquid mass flow rate is determined as a function of a predetermined basis weight, calculated as the product of the predetermined basis weight, the carrier web speed, the coating width perpendicular to the carrier web speed, and the reciprocal of the solids content.

[0039] In one embodiment, the manufacturing process further includes measuring the basis weight of the coating after the coating has been applied to the 23-3490.

[0040] 7

[0041] Carrier track, whereby in particular a transverse distribution of the coating's basis weight perpendicular to the conveying direction of the carrier track is determined. This ensures, in particular, a uniform distribution across the coating width. Basis weight measurement is carried out, in particular, by means of ultrasonic absorption, X-rays, or microwave radiation.

[0042] According to one aspect of the disclosure, a manufacturing device for producing a component, in particular an electrode, for a battery cell of an energy storage device, in particular a traction battery for a motor vehicle, is provided, wherein the component has a carrier web and a coating applied to the carrier web, wherein the manufacturing device has at least one slurry reservoir for providing slurry material and an application tool for applying slurry material as a coating, wherein the at least one slurry reservoir is connected to the application tool by means of at least one feed line for supplying the slurry material to the application tool, wherein the at least one feed line each has a slurry material pump for conveying the slurry material.wherein at least one volume flow sensor configured to measure the volume flow of the at least one slurry material and at least one density sensor configured to measure the density of the at least one slurry material are arranged on the at least one supply line, wherein the manufacturing device is configured to determine a mass flow of the at least one slurry material as a function of the volume flow and the density and to regulate the mass flow of the at least one slurry material to a predetermined set mass flow by means of the volume flow. The manufacturing device also realizes the aforementioned technical advantages of the manufacturing process, to which explicit reference is hereby made.

[0043] Optionally, the manufacturing device can be designed such that one or more features of the manufacturing process described as advantageous or optional are implemented in order to achieve a related technical effect. In particular, the manufacturing device is configured to carry out the manufacturing process described above.

[0044] Optionally, the coating has at least two layers, with a slurry material being provided for each of the at least two layers, wherein the manufacturing apparatus has at least two slurry reservoirs, at least two supply lines and at least two slurry material pumps, wherein at least 23-3490 are connected to each of the at least two supply lines.

[0045] 8. A volumetric flow sensor configured to measure the volumetric flow rate of a respective slurry material and at least one density sensor configured to measure the density of a respective slurry material are arranged, wherein the manufacturing device is configured to determine a respective mass flow rate of the respective slurry material depending on the respective volumetric flow rate and the respective density, and to regulate the respective mass flow rate of the respective slurry material to a predetermined respective set mass flow rate by means of the respective volumetric flow rate. This ensures a uniform mass flow rate for at least two layers and thus two slurry materials.

[0046] In one embodiment, the application tool has a slot nozzle, wherein, in particular, the application tool has at least two outlet slots, each for a different slurry material. In particular, the application tool comprises a multi-layered, especially two-layered, slot nozzle, wherein, in particular, two or more independent slots with associated slurry reservoirs and slurry feed channels are provided. This allows, for example, the production of an electrode film from two different slurry materials and the targeted control of its morphology. In another embodiment, the application tool has a doctor blade and / or an anilox roller.

[0047] Optionally, the at least one slurry material pump is configured to operate at a specific pump speed, and in particular, at least one flow sensor is configured to determine the flow rate as a function of the pump speed, and / or in particular, the flow rate can be adjusted by means of the pump speed. This allows the flow rate of a slurry material to be determined easily. In particular, the pump speed is proportional to the flow rate. Specifically, a flow sensor configured to measure the flow rate of the at least one slurry material includes a tachometer for the slurry material pump.

[0048] Optionally, the respective predetermined setting mass flow rate is a liquid mass flow rate of the at least one slurry material when the at least one slurry material is fed in, or a solid mass flow rate of the at least one slurry material after drying a liquid portion of the respective slurry material, wherein in particular the respective predetermined setting mass flow rate is determined from a respective predetermined basis weight of the respective layer of the coating after drying a liquid portion of the respective coating.

[0049] One embodiment of each is described below with reference to the figures. 23-3490

[0050] 9

[0051] Fig. 1 schematically shows a motor vehicle with an energy storage device comprising a battery cell with an electrode, which was produced by a method according to one aspect of the disclosure;

[0052] Fig. 2 schematically shows a manufacturing device according to one aspect of the disclosure;

[0053] Fig. 3 schematically shows a relationship between the density and the solids content of a slurry material; and

[0054] Fig. 4 schematically shows a flowchart of a manufacturing process according to one aspect of the disclosure.

[0055] Figure 1 schematically shows a motor vehicle 50 with an energy storage device 55 with a battery cell 56 with an electrode 60a, which was manufactured by means of a manufacturing process 200 according to an aspect of the disclosure.

[0056] Motor vehicle 50 is a land vehicle. Motor vehicle 50 is a passenger car.

[0057] The motor vehicle 50 has an energy storage device 55, also referred to as a traction battery or drive battery, and an electric drive 52. The energy storage device 55 has a plurality of battery cells 56, the number of which is shown only schematically. The energy storage device 55, or the battery cells 56, are configured to be supplied with electrical energy in order to charge the battery cells 56, i.e., to increase the state of charge of the battery cells 56. The energy storage device 55, or the battery cells 56, are configured to provide electrical energy for operating the motor vehicle 50 and / or the electric drive 52, whereby the battery cells 56 are discharged, i.e., the state of charge of the battery cells 56 decreases. Each of the battery cells 56 has one electrode 60a configured as an anode and one as a cathode.

[0058] Such an electrode 60a is a component 60 of the battery cell 56 and is manufactured in a manufacturing device 100. The manufacturing device 100 and its features are described with reference to Figure 2.

[0059] Figure 2 schematically shows manufacturing device 100 according to one aspect of the disclosure. The manufacturing device 100 according to Figure 2 is a manufacturing device 100 for producing a component 60 for a battery cell 56 of an energy storage device 55, in particular a traction battery for a motor vehicle 50. Such a battery cell 56 is described with reference to Figure 1. 23-3490

[0060] 10

[0061] Component 60 has a carrier web 61. The carrier web 61 can also be referred to as a carrier film. The carrier web 61 has a length of several meters up to several hundred meters or more. Figure 2 shows the carrier web 61 in sections. For example, the carrier web 61 is conveyed by means of a roller or suspended conveyor system. The carrier web 61 is, for example, metallic for an electrode 60a. Depending on the electrode 60a, the carrier web 61 consists of copper or aluminum. For example, the carrier web 61 is made of copper and has a thickness of 6 pm. For example, the carrier web 61 is made of aluminum and has a thickness of 12 pm.

[0062] The manufacturing device 100 has a coating section configured to apply the coating 62 to the carrier web 61. In this embodiment, the coating 62 has two layers 70, 80. The coating section thus arranges one or more materials forming the coating 62 on a first side of the carrier web 61.

[0063] The two layers 70, 80 are produced from a first slurry material and a second slurry material. The production device 100 has two slurry reservoirs 71, 81. The first slurry reservoir 71 is for the first slurry material and the second slurry reservoir 81 is for the second slurry material. The slurry reservoirs 71, 81 are connected to an application tool 76 by means of supply lines 72, 82. In this embodiment, the application tool 76 is a slot nozzle 77 with two independent slots for applying the two layers 70, 80.

[0064] Following the coating section, a drying section (not shown) is provided. In the drying section, which can also be referred to as an oven, the material(s) forming the coating 62 dry. After drying, component 60 has a coating 62 applied to the carrier web 61.

[0065] Each of the respective supply lines 72, 82 is equipped with a slurry material pump 73, 83 for conveying the slurry material from the respective slurry material reservoir 71, 81 to the application tool 76. Furthermore, each of the respective supply lines 72, 82 is equipped with a volumetric flow sensor 74, 84 and a density sensor 75, 85. The sensors 74, 75, 84, 85 are designed and configured to measure the volumetric flow rate and the density of the slurry material in the respective supply line 72, 82. 23-3490

[0066] 11

[0067] In particular, the manufacturing device 100 has a control unit (not shown in Fig. 2) configured to control the slurry material pumps 73, 83 and to read out measurement data, in particular volume flow and density, provided by the volume flow sensors 74, 84 and density sensors 75, 85. Preferably, the control unit is configured to determine a mass flow rate from the respective volume flow rate and density of a slurry material. For example, the control unit is configured to control the respective slurry material pump 73, 83 as a function of the mass flow rate, such that the mass flow rate is regulated to a predetermined set mass flow rate.

[0068] Fig. 3 shows an exemplary relationship between a density Q and a solids content SC of a slurry material. The sketched curve shows that a higher solids content SC results in a higher density of the slurry material. During the manufacturing process of a component 60, the density and solids content of the slurry material can change, for example, due to different manufacturing conditions. If a slurry material within a slurry material reservoir 71, 81 exhibits a heterogeneous density, for example, due to the settling of solids at the bottom of the reservoir, the density depends on the sampling point from the slurry material reservoir 71, 81.

[0069] Figure 4 shows a schematic flowchart of a manufacturing process 200 according to a first aspect of the disclosure. Figure 4 is described with reference to Figures 1 to 3. As a first step, the process involves providing 210 a carrier web 61 and at least one slurry material. In this embodiment, two slurry materials are provided for a coating 62 with two layers 70, 80. In other embodiments, one slurry material is provided for a coating 62 with one layer 70, or more than two slurry materials are provided for a coating 62 with more than two layers 70, 80.

[0070] The two slurry materials are then fed 220 to an application tool 76 for applying the coating 62. During feeding, the volumetric flow rate and density of each of the two slurry materials are measured 230. Subsequently, the manufacturing process 200 includes determining 240 the mass flow rate of each of the two slurry materials. The liquid mass flow rate is calculated as the product of density and volumetric flow rate. As the next step, the manufacturing process 200 includes applying 250 the two slurry materials as a coating 62 to the carrier web 61 using the application tool 76. Finally, the manufacturing process 200 includes a control 260 23-3490

[0071] 12 on a setting mass flow rate. In this embodiment, the two setting mass flows for the two slurry materials are each a liquid mass flow rate. If, for example, it is determined that the measured mass flow rate is lower than the setting mass flow rate, the volume flow rate of the respective slurry material is increased. For this purpose, for example, the rotational speed of a slurry material pump 73, 83 is increased during the feed 220.

[0072] In another embodiment, not shown, the process steps of manufacturing process 200 essentially correspond to the process steps shown in Figure 4. In addition, the predetermined mass flow rate is determined from a predetermined basis weight of the respective coating layer. The predetermined liquid mass flow rate is calculated as the product of the predetermined basis weight, a carrier web speed, a coating width perpendicular to the carrier web speed, and the reciprocal of the solids content. The solids content is determined from the measured density of the slurry material using a previously determined density-to-solids ratio, as exemplified in Figure 3. In this way, the manufacturing process is controlled to a predetermined basis weight of the respective layer by measuring the volumetric flow rate and density during component production.

[0073] 23-3490

[0074] 13

[0075] Reference symbol (part of the description)

[0076] 50 motor vehicles

[0077] 52 electric drive

[0078] 55 Energy storage device

[0079] 56 battery cells

[0080] 60 components

[0081] 60a electrode

[0082] 61 Carrier track

[0083] 62 Coating

[0084] 70, 80 shift

[0085] 71, 81 Slurry reservoir

[0086] 72, 82 Supply line

[0087] 73, 83 Slurry material pump

[0088] 74, 84 Volume flow sensor

[0089] 75, 85 density sensor

[0090] 76 Application tool

[0091] 77 Slot nozzle

[0092] 100 manufacturing device

[0093] 200 manufacturing processes

[0094] 210 Provision of a carrier track and at least one slurry material

[0095] 220 Feeding the two slurry materials

[0096] 230 Measuring a volume flow rate and a density

[0097] 240 Determining a mass flow rate

[0098] 250 Applying the two slurry materials

[0099] 260 rules for a settling mass flow

[0100] Q density

[0101] SC solid content, solid content

Claims

23-3490 14 Claims 1. Manufacturing process (200) for manufacturing a component (60), in particular an electrode (60a), for a battery cell (56) of an energy storage device (55), in particular a traction battery for a motor vehicle (50), wherein the component (60) has a carrier web (61) and a coating (62) applied to the carrier web (61), wherein the manufacturing process (200) comprises: - Providing (210) the carrier web (61) and at least one slurry material for coating, - Feeding (220) the at least one slurry material to an application tool (76) for applying the coating (62), - Application (250) of the at least one slurry material as a coating (62) onto the carrier web (61) by means of the application tool (76), wherein a volume flow rate and a density of the at least one slurry material are measured (230) when feeding (220) to the application tool (76) and a mass flow rate of the at least one slurry material is determined (240) as a function of the volume flow rate and the density, wherein the mass flow rate of the at least one slurry material is regulated (260) to a predetermined setting mass flow rate by means of the volume flow rate.

2. Manufacturing method (200) according to claim 1, wherein the coating (62) has at least two layers (70, 80), wherein a slurry material is provided for each of the at least two layers (70, 80), wherein during the feeding (220) to the application tool (76) a volume flow rate and a density of the respective slurry material are measured (230) for each of the at least two layers (70, 80) and a respective mass flow rate of the respective slurry material is determined (240) as a function of the respective volume flow rate and the respective density, wherein the respective mass flow rate of the respective slurry material is regulated (260) to a predetermined setting mass flow rate by means of the respective volume flow rate.

3. Manufacturing method (200) according to claim 1 or 2, wherein the at least one slurry material is fed to the application tool (76) by means of a slurry material pump (73, 83), wherein the slurry material pump (73, 83) is operated at a pumping speed, 23-3490 15 wherein in particular the volume flow of at least one slurry material is determined by means of the pump speed and / or a volume flow sensor (74, 84) arranged in a supply line to the application tool (76), and / or wherein in particular the volume flow of at least one slurry material is set by means of the pump speed.

4. Manufacturing process (200) according to any one of claims 1 to 3, wherein the respective predetermined setting mass flow is a liquid mass flow of the at least one slurry material when feeding the at least one slurry material or a solid mass flow of the at least one slurry material after drying a liquid portion of the respective slurry material.

5. Manufacturing process (200) according to one of claims 1 to 4, wherein, depending on an assignment between density and a solid content of a respective slurry material, a liquid mass flow of the at least one slurry material is converted into a solid mass flow, wherein, in particular, in a further, in particular first, process step, the assignment between density and the solid content of a respective slurry material is determined.

6. Manufacturing process (200) according to one of claims 1 to 5, wherein the respective predetermined setting mass flow is determined or is determined from a respective predetermined basis weight of the respective layer (70, 80) of the coating (62) after drying a liquid portion of the respective coating (62).

7. Manufacturing device (100) for manufacturing a component (60), in particular an electrode (60a), for a battery cell (56) of an energy storage device (55), in particular a traction battery for a motor vehicle (50), wherein the component (60) has a carrier track (61) and a coating (62) applied to the carrier track (61), wherein the manufacturing device (100) has at least one slurry reservoir (71, 81) for providing slurry material and an application tool (76) for applying slurry material as a coating (62), wherein the at least one slurry reservoir (71, 81) is connected to the application tool (76) by means of at least one supply line (72, 82) for supplying the slurry material to the application tool (76), wherein the at least one supply line (72, 82) each has a slurry material pump (73, 83) for conveying the slurry material, 23-3490 16 wherein at least one volume flow sensor (74, 84) configured to measure a volume flow of the at least one slurry material and at least one density sensor (75, 85) configured to measure a density of the at least one slurry material is arranged on the at least one supply line (73, 83), wherein the manufacturing device (100) is configured to determine a mass flow of the at least one slurry material as a function of the volume flow and the density and to regulate the mass flow of the at least one slurry material to a predetermined setting mass flow by means of the volume flow.

8. Manufacturing device (100) according to claim 7, wherein the coating (62) has at least two layers (70, 80), wherein a slurry material is provided for each of the at least two layers (70, 80), wherein the manufacturing device (100) has at least two slurry reservoirs (71, 81), at least two supply lines (72, 82) and at least two slurry material pumps (73, 83), wherein at least one volume flow sensor (74, 84) configured to measure a volume flow of a respective slurry material and at least one density sensor (75, 85) configured to measure a density of a respective slurry material are arranged on each of the at least two supply lines (72, 82), wherein the manufacturing device (100) is configuredto determine a respective mass flow rate of the respective slurry material depending on the respective volume flow rate and density, and to regulate the respective mass flow rate of the respective slurry material to a predetermined respective settling mass flow rate using the respective volume flow rate.

9. Manufacturing device (100) according to claim 7 or 8, wherein the at least one slurry material pump (73, 83) is configured to be operated at a pump speed, wherein in particular at least one volume flow sensor (74, 84) is configured to determine a volume flow as a function of the pump speed and / or wherein in particular the at least one volume flow is adjustable by means of the pump speed.

10. Manufacturing apparatus (100) according to any one of claims 7 to 9, wherein the respective predetermined setting mass flow is a liquid mass flow of the at least one slurry material when feeding the at least one slurry material or a solid mass flow of the at least one slurry material after drying a liquid portion of the respective slurry material, 23-3490 17 wherein in particular the respective predetermined setting mass flow is determined from a respective predetermined basis weight of the respective layer of the coating (62) after drying a liquid portion of the respective coating (62).

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