Method and system

Abstract

The invention relates to a method for predicting a transportable quantity of a viscous material (D), the transportable quantity being transportable by means of an electrically driven machine (1), the method comprising the following steps: a) ascertaining an energy demand (EB) required by the electrically driven machine (1) for transporting a predetermined quantity unit of the viscous material (D); b) ascertaining an energy reserve (EV) that can be used to drive the electrically driven machine (1); and c) comparing the energy demand (EB) for each predefined amount unit with the energy reserve (EV) in order to estimate the amount of the viscous material (D) that can be transported.

Description

Technical Field

[0001] The invention relates to a method for predicting a deliverable quantity of a viscous material, wherein the deliverable quantity is deliverable by means of an electrically drivable machine. The invention also relates to a system for carrying out such a method. Background Art

[0002] To transport viscous materials on construction sites, machines are conventionally used which have an internal combustion engine and a fuel tank for their own drive. The internal combustion engine is supplied with fuel from the fuel tank. How much viscous material can still be transported by means of the machine depends on the fuel filling level of the fuel tank. If an electrically drivable machine is used for transporting viscous materials instead of a machine with an internal combustion engine, the fuel tank and therefore also the possibility of displaying the filling level are omitted. Summary of the invention

[0003] The object of the present invention is to specify a method for predicting the amount of a viscous material that can be conveyed by means of an electrically drivable machine and a system having such an electrically drivable machine, which method and system allow a particularly reliable conveying operation for conveying viscous materials.

[0004] The method according to the present invention is used to predict the conveyable amount of a viscous material. The conveyable amount can be conveyed by means of an electrically drivable machine. The concepts "drivable" and "driven" are used synonymously in the current context unless otherwise specified. The method has a step a). According to step a), the energy demand is ascertained, which is required by the electrically driven machine to convey a predetermined amount of the viscous material. In addition, the method has a step b). According to step b), the energy reserve is ascertained, which can be used to drive the electrically driven machine. In addition, the method has a step c). According to step c), the energy demand per predetermined unit of quantity is compared with the energy reserve in order to estimate the conveyable amount of the viscous material. This estimation can advantageously avoid: in the operation of the electrically drivable machine, the existing energy reserve is exhausted in time before the desired amount of the viscous material is required. In the worst case, if the desired amount of the viscous material cannot be fully conveyed, then there will be a situation where the remaining viscous material remains in the electrically drivable machine without countermeasures. This remaining part may then harden, which may lead to damage or even complete failure of the electrically driven machine. This can be advantageously avoided by means of the method according to the invention. In this way, a particularly reliable conveying operation for conveying viscous materials can be achieved.

[0005] In the design of the present invention, steps a), b) and / or c) are implemented in time before the viscous material is transported by means of an electrically drivable machine. In particular, steps a), b) and / or c) are implemented based on a parameterizable digital model of the electrically drivable machine. In this way, it can be ensured before the start of the conveying operation that the electrically drivable machine will not be placed in the following situation in which the energy reserve may be too small for the desired conveying amount. As an alternative or supplementary solution, steps a), b) and / or c) are implemented in time during the conveying of the viscous material by means of an electrically drivable machine. Here, steps a), b) and / or c) can be implemented in continuous repetition during the conveying of the viscous material. In particular, steps a), b) and / or c) are implemented in this way when conveying the viscous material, so as to continuously update the (still) transportable amount of the viscous material estimated according to step c). If there is a premature exhaustion of the energy reserve, this allows timely intervention during the conveying operation. This proves to be advantageous in particular when the energy demand changes. The energy requirement changes if the geodetic pumping height to be overcome when conveying viscous materials and / or the building material consistency and / or the conveying rate changes.

[0006] In another embodiment of the invention, the electrically drivable machine has an electrical energy storage device. When determining the energy reserve according to step b), the amount of energy stored in the electrical energy storage device is taken into account. In this case, the electrical energy storage device can be charged with electrical energy when receiving a charging power, wherein the charging power is taken into account when determining the energy reserve according to step b). In this way, the energy reserve can be replenished during the conveying of viscous materials. The endurance of the energy reserve can be correspondingly increased during the conveying of viscous materials. This increase in the energy reserve can advantageously be taken into account during the estimation according to step c).

[0007] In another embodiment of the invention, the electrically drivable machine has an electric drive for conveying a viscous material. The electric drive is supplied with electric energy from an electric energy storage device of the electrically drivable machine in order to convey the viscous material. The electrically drivable machine can have an electrical connection for connecting the electric drive of the electrically drivable machine and, as an alternative or in addition, its electric energy storage device to an (external) power supply network. As a result, the electric drive can advantageously be supplied with electric energy while the electric energy storage device is being charged.

[0008] In a further embodiment of the invention, the energy requirement / quantity unit quotient is determined when carrying out step a). The energy requirement / quantity unit quotient estimates the amount of energy required to convey a predetermined quantity unit of the viscous material. This advantageously generates a single characteristic variable, based on which the estimation according to step c can be performed. This characteristic variable can be processed, in particular calculated, particularly easily electronically.

[0009] In another embodiment of the present invention, the method additionally comprises a step d). According to step d), the electrically drivable machine is operated based on the conveyable amount of the viscous material estimated according to step c). In particular, the electrically drivable machine can automatically switch between different operating modes in which the electrically drivable machine consumes different amounts of electrical energy. This allows automatic range optimization of the electrically drivable machine.

[0010] In another embodiment of the invention, the electrically drivable machine has an electrical energy storage device. In this case, when carrying out step a), the energy requirement associated with a predetermined unit quantity is determined based on the instantaneous electrical power provided by the electrical energy storage device. As an alternative or in addition, the energy requirement associated with a predetermined unit quantity is determined based on the temporal profile of the electrical power provided by the electrical energy storage device. This allows for particularly precise predictions.

[0011] In another embodiment of the invention, the shorter the time period since the restart of the viscous material delivery operation, the higher the weighting of the time profile of the electric power provided by the electric energy storage device with respect to the instantaneous electric power provided by the electric energy storage device during the implementation of step a). In this way, power fluctuations of the electrically drivable machine that differ from the average value and that are encountered particularly frequently and significantly when the electrically drivable machine is started can be advantageously compensated.

[0012] In another embodiment of the invention, the instantaneous electrical transmission power is only taken via the electrical connection of the electrically driven machine, as long as the electrical transmission power does not exceed the maximum electrical connection power. As long as the electrical transmission power exceeds the maximum electrical connection power, the instantaneous electrical transmission power is taken via the electrical connection with its maximum electrical connection power and additionally from the electrical energy storage device. In this way, it can be advantageously ensured that electrical energy is only taken from the electrical energy storage device when the electrical connection power taken from the power supply network via the electrical connection is insufficient for operating the electrically driven machine at a predetermined operating point. This predetermined operating point can be an operating point at which the electrically driven machine has its maximum efficiency.

[0013] In another embodiment of the present invention, the electrical energy storage device is charged via the electrical connection as long as the electrical transmission power does not exceed the maximum electrical connection power. In this way, the maximum electrical connection power can be utilized as well as possible.

[0014] In another embodiment of the invention, the remaining possible conveying amount of the viscous material is calculated and visualized based on the comparison according to step c) and the instantaneous charge state of the electrical energy storage device. The visualization advantageously allows the operator of the electrically drivable machine to intervene in time before the available energy reserves are no longer sufficient to process the amount of viscous material to be conveyed.

[0015] In another embodiment of the invention, it is calculated and visualized which portion of the remaining possible delivery volume of the viscous material is based on the electrical power drawn via the electrical connection. In addition, it is calculated and visualized which portion of the remaining possible delivery volume of the viscous material is based on the electrical power drawn from the electrical energy storage device. The calculation and visualization can be performed based on the comparison according to step c). This also advantageously provides the operator with the possibility of intervention.

[0016] In another embodiment of the invention, the desired delivery quantity can be predetermined. In this case, it is calculated based on the comparison according to step c) and the instantaneous charge state of the electrical energy storage device whether the desired delivery quantity can be delivered. This allows for a particularly convincing prediction.

[0017] In another embodiment of the invention, the electrically driven machine for conveying viscous materials has different operating modes, which differ in their energy requirements per predetermined quantity unit conveyed. In particular, when carrying out step c), one of the operating modes is selected based on the desired conveyed quantity and based on the instantaneous charge state of the electrical energy storage device. This selection of one of the operating modes can preferably be carried out automatically. This ensures the best possible utilization of the energy reserve. The term "operating mode" can be understood as synonymous with the term "operating mode".

[0018] In another embodiment of the present invention, the method additionally comprises a step e). According to step e), a cruising range value based on the comparison according to step c) is outputted, in particular displayed. Here, the cruising range value can reflect how much energy is stored in the electric energy storage device of the electrically drivable machine. As an alternative or supplementary solution, the cruising range value can reflect how much the viscous material (still) can be delivered by means of the energy reserve, in particular in the case of calculation in multiples of the capacity of a unit-truck mixer or other volumetric units. As an alternative or supplementary solution, the method additionally comprises a step f). According to step f), the desired delivery volume is determined, in particular input, and a feasibility attribute is outputted, in particular displayed. The feasibility attribute is based on the comparison according to step c) and the desired delivery volume. Here, the feasibility attribute can reflect whether the desired delivery volume is covered by the deliverable volume of the viscous material. As an alternative or supplementary solution, the feasibility attribute can reflect whether and / or to what extent the desired delivery volume exceeds or falls below the deliverable volume of the viscous material. This allows the method to be particularly intuitively implemented.

[0019] The invention also relates to a system having an electrically drivable machine for conveying viscous materials. The system also comprises an electronic computing unit, in particular a control device, which is connected to the electrically drivable machine, in particular for data transmission. The electronic computing unit is designed to implement the method according to the invention as described above. The above-mentioned advantages of the method according to the invention therefore also apply to the system according to the invention. Preferably, the electrically drivable machine has an electric drive and an electric energy storage device for storing at least part of the energy reserve for supplying the electric drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Further advantages and features of the invention are apparent from the claims and the following description of preferred exemplary embodiments of the invention, which are illustrated with the aid of the drawings. In this context, identical reference numerals refer to identical or similar or functionally identical components.

[0021] It goes without saying that the features mentioned above and the features still to be explained below can be used not only in the respectively specified combination but also in other combinations or alone, without departing from the scope of the present invention.

[0022] Figure 1 The process of one embodiment of the method according to the present invention is shown in a schematic flow chart, and

[0023] Figure 2 The structure of an embodiment of the system according to the invention is shown schematically. DETAILED DESCRIPTION

[0024] The method according to the present invention is used to predict the conveyable amount of a viscous material D. The conveyable amount of the viscous material D can be conveyed by means of an electrically drivable machine 1. The electrically drivable machine 1 is a functional component of the system 10 according to the present invention. The electrically drivable machine 1 is used to convey the viscous material D. In addition, the system 1 has an electronic computing unit 11, which is connected to the electrically drivable machine 1, for example, for data transmission. The electronic computing unit 11 can be a control device. The electronic computing unit 11 is set up to implement the method according to the present invention. The electrically drivable machine 1 currently has an electric drive 3 and an electric energy storage device 2 for storing at least a part of an energy reserve EV, which is used to supply the electric drive 3. The electric drive 3 can be controlled by means of the electronic computing unit 11.

[0025] For example, the electrically drivable machine 1 also has a viscous material pump unit, which is drivably connected to the electric drive. The viscous material pump unit can have a delivery cylinder with a variable volume delivery chamber. In order to change the volume of the delivery chamber in particular in the opposite direction, the delivery cylinder can have an adjustable delivery piston respectively. In addition, the viscous material pump unit can include an S-shaped S-tube, which is connected to a pressure connection pipe that acts as a pump outlet at one end to conduct fluid. The S-tube can be arranged in a storage chamber that can be filled with viscous material from above and is used to store viscous material. Here, the S-tube can be rotatably supported on the pressure connection pipe at one end inside the storage chamber. The variable volume delivery chamber can be connected to the storage chamber. The S-tube can be deflected relative to the delivery chamber in the storage chamber so that it can be alternately connected to one of the delivery chambers in a fluid-conducting manner. In this way, through the opposite effect of the deflection of the S-tube and the volume change of the delivery chamber, the viscous material in the storage chamber can be alternately sucked by means of the delivery chamber and pumped outward through the delivery chamber through the S-tube via the pressure connection pipe. Furthermore, an agitator can be arranged in the supply chamber of the viscous material pump unit. When conveying viscous material, for example, if the conveying volume is to be increased and / or the geodetic pumping height changes and / or the properties of the conveyed viscous material change, the conveying pressure to be provided by the viscous material pump unit can change. Due to the change in the conveying pressure, the conveying power to be provided by the viscous material pump unit and thus the energy requirement EB of the electrically drivable machine 1 also changes.

[0026] The method according to the invention comprises a step a). According to step a), the energy requirement EB is determined, which is required by the electrically driven machine 1 to convey a predetermined unit quantity of the viscous material D. In addition, the method comprises a step b). According to step b), the energy reserve EV available for driving the electrically driven machine 1 is determined. In addition, the method comprises a step c). According to step c), the energy requirement EB per predetermined unit quantity is compared with the energy reserve EV in order to estimate the conveyable quantity of the viscous material D. For example, steps a) and b) are carried out in time before the viscous material D is conveyed by means of the electrically driven machine 1, and step c) is carried out as an alternative or supplement.

[0027] Steps a), b) and / or c) are implemented before the delivery of the viscous material D in time, which can be performed according to a parameterizable digital model of the electrically drivable machine 1. The parameterizable digital model can be based on the characteristic values ​​of the electrically drivable machine 1 that have been found in the past. The parameterizable digital model can be parameterized to match the local characteristics of the use site, especially the construction site. As an alternative to the practice of implementing steps a), b) and / or c) before starting the viscous material delivery, steps a), b) and / or c) can be implemented during the viscous material delivery. Therefore, for example, steps a), b) can be implemented in time during the delivery of the viscous material D by means of the electrically drivable machine 1 and step c is implemented as an alternative or supplementary solution. Here, steps a), b) and / or c can be implemented with continuous repetition during the delivery of the viscous material. In particular, steps a), b) and / or c) are implemented in this way during the viscous material delivery, so as to continuously update the viscous material D, the amount of conveyable material estimated according to step c). In this respect, conclusions about the amount of viscous material D that can still be conveyed can be continuously updated.

[0028] As already mentioned, the electrically drivable machine 1 currently has an electric energy storage device 2. In this case, when determining the energy reserve EV according to step b, the energy quantity ES stored in the electric energy storage device 2 is taken into account. In this case, the electric energy storage device 2 can be charged with electrical energy while receiving a charging power PL. When determining the energy reserve EV according to step b), this charging power PL can be taken into account. In other words, it can be taken into account how much electrical energy is taken from the electric energy storage device 2 and how much electrical energy is supplied to the electric energy storage device 2 by means of the charging power PL.

[0029] As has also been mentioned, the electrically drivable machine 1 currently has an electric drive 3 for conveying a viscous material D. In this case, the electric drive 3 is supplied with electrical energy by an electric energy storage device 2 of the electrically drivable machine 1 in order to convey the viscous material D. For example, the electrically drivable machine 1 has an electrical connection 4 for connecting its electric drive 3 to a power supply network V. As an alternative or in addition, the electrical connection 4 can be designed for connecting the electric energy storage device 2 to the power supply network V. The power supply network V can be an external, for example a public power supply network V. However, it is also conceivable that the power supply network V is a local power supply network V present in the field of application. The electrical connection 4 can be set up for connection to power supply networks V of different current strengths.

[0030] For example, when carrying out step a), the energy requirement / quantity unit quotient is determined. The energy requirement / quantity unit quotient estimates the amount of energy required to convey a predefined quantity unit of the viscous material D.

[0031] In accordance with Figure 1In an embodiment of the method, the method additionally comprises a step d). According to step d), the electrically drivable machine 1 is operated based on the conveyable quantity of the viscous material D estimated according to step c).

[0032] For example, when performing step a), and more precisely based on the instantaneous electric power PG provided by the electric energy storage device 2, the energy demand EB associated with the predetermined quantity unit is ascertained. As an alternative or supplementary solution, the energy demand EB is ascertained based on the time-dependent variation curve of the electric power PG provided by the electric energy storage device 2. Here, the shorter the duration since the restart of the viscous material conveying operation, the higher the time-dependent variation curve of the electric power PG provided by the electric energy storage device 2 is weighted when performing step a). In particular, at the beginning of the viscous material conveying operation, that is, for example, when the motor 1 restarts operation, the electric power PG provided by the electric energy storage device 2 may deviate sharply from the average electric power PG provided by the electric energy storage device 2. This can at least be compensated by the aforementioned weighting. The electronic computing unit 11 can have an algorithm for machine learning, which can automatically learn from the past operating data of the system 10 in order to gradually refine the accuracy of the prediction by means of the method according to the present invention.

[0033] For example, as long as the electrical transmission power PF does not exceed the maximum electrical connection power PA, the instantaneous electrical transmission power PF is only taken through the electrical connection 4 of the electrically driven machine 1. Here, as long as the electrical transmission power PF exceeds the maximum electrical connection power PA, the instantaneous electrical transmission power PF is taken through the electrical connection 4 with its maximum electrical connection power PA and additionally from the electrical energy storage device 2. If the maximum electrical connection power PA is not sufficient to provide the electrical transmission power PF required for the viscous material conveyance alone, a part of the electrical transmission power PF can be additionally taken from the electrical energy storage device 2. On the other hand, if the maximum electrical connection power PA is sufficient to provide the electrical transmission power PF, it is possible to forgo taking energy from the electrical energy storage device 2. As long as the electrical transmission power PF does not exceed the maximum electrical connection power, the electrical energy storage device 2 can be charged through the electrical connection 4.

[0034] For example, the remaining possible delivery amount of the viscous material D is calculated based on the comparison according to step c) and the instantaneous charge state LZ of the electrical energy storage device 2 . Furthermore, it is possible to visualize the remaining possible delivery amount of the viscous material D. For example, it is calculated and visualized which portion of the remaining possible delivery amount of the viscous material is based on the electrical power PB drawn via the electrical connection 4 and which portion of the remaining possible delivery amount of the viscous material D is based on the electrical power PG drawn from the electrical energy storage device 2 .

[0035] For example, a desired delivery quantity can be predetermined. Based on the comparison according to step c) and the instantaneous state of charge LZ of the electrical energy storage device 2 , it is calculated whether the desired delivery quantity can be delivered. The result of this calculation can also be visualized.

[0036] The above-described visualization can show the operator of the system 10 what this provides him with when he uses the connection on the distribution box that is present at the construction site. It is also possible to selectively leave a certain surplus amount of electrical energy in the electrical energy storage device 2 so that this surplus amount can be used for the construction site to be processed later.

[0037] The electrically driven machine 1 for conveying a viscous material D can have different operating modes. These operating modes differ, for example, in their energy requirements per predetermined unit of quantity conveyed. Here, in particular, one of the operating modes can be selected based on the desired conveying volume and based on the instantaneous charge state LZ of the electric energy storage device 2 when implementing step c). This selection of one of the operating modes can be performed automatically. Therefore, if the situation shows that the energy reserve EV is not sufficient for the predetermined unit of quantity of the viscous material D in the normal operation of the electrically driven machine 1, the electrically driven machine 1 can be automatically placed in an energy-saving mode. In the energy-optimized operating mode, the piston speed of the viscous material pump unit can be reduced. In addition, auxiliary loads, such as agitators and possible coolers or filters, can be optionally stopped. This adjustment can be performed step by step, so that there is not only an energy-optimized operating mode, but also a plurality of operating modes that can gradually reduce the energy consumption of the electrically driven machine 1.

[0038] In addition, according to Figure 1 The method comprises a step e). According to step e), a cruising range value is output, for example displayed. The cruising range value is based on the comparison according to step c. Here, the cruising range value can reflect how much energy ES is stored in the electric energy storage device 2 of the electrically drivable machine 1. As an alternative or supplement, the cruising range value can reflect how much of the viscous material D can still be conveyed with the aid of the energy reserve EV. For example, the amount of the viscous material D that can still be conveyed can be expressed in multiples of the unit - the capacity of a truck mixer or other volume units. The amount that can still be conveyed can be expressed in cubic meters per hour or cubic yards per hour. The "amount that can still be conveyed" can be referred to as the "remaining conveying amount".

[0039] In addition, according to Figure 1, the method comprises a step f). According to step f), the desired delivery amount is determined. For example, the desired delivery amount can be input. In addition, according to step f), a feasibility attribute is output, in particular displayed, which is based on the comparison according to step c) and the desired delivery amount. Here, the feasibility attribute can reflect whether the desired delivery amount is covered by the deliverable amount of the viscous material. As an alternative or supplementary solution, the feasibility attribute can reflect whether and / or to what extent the desired delivery amount exceeds or falls below the deliverable amount of the viscous material D. The feasibility attribute can reflect, for example, whether the energy reserve EV is sufficient, barely sufficient, or insufficient for delivering the desired delivery amount.

[0040] Based on the parameterizable digital model of the electrically drivable machine 1 mentioned at the beginning, a construction site planning system can be realized. Such a construction site planning system can be a computer program product that can be executed on a conventional computer. With the help of the computer program product, it is possible to simulate how many electrically drivable machines are needed to convey viscous materials on a specific construction site. The simulated construction site can also exist as a parameterizable digital model of a construction site planning system. Here, the parameterizable digital model can be parameterized depending on the specific local conditions of the simulated construction site and / or the electrically drivable machine 1. For example, the specific local conditions are the local power supply grid V and its technical requirements. The power supply grid V can, for example, provide a current with a current intensity of 16A, 32A, 63A or 125A according to the technical requirements. It is also possible that there is no power supply grid V at all on the simulated construction site, so that the electrically drivable machine 1 can only be supplied with electrical energy from the electric energy storage device 2.

Claims

1. A method for predicting a deliverable quantity of a viscous material (D), wherein the deliverable quantity can be delivered by means of an electrically drivable machine (1), The method comprises the following steps: a) determining the energy requirement (EB) of the electrically driven machine (1) for conveying a predetermined unit quantity of viscous material (D), b) determining the energy reserves (EV) available for driving the electrically driven machine (1), and c) comparing the energy requirement (EB) per predefined unit of quantity with the energy reserve (EV) in order to estimate the conveyable quantity of the viscous material (D).

2. The method according to claim 1, characterized in that: - steps a), b) and / or c) are carried out temporally before the viscous material (D) is conveyed by means of the electrically drivable machine (1), in particular on the basis of a parameterizable digital model of the electrically drivable machine (1), and / or - carrying out steps a), b) and / or c) in a timely manner, in particular in continuous repetition, during the conveying of the viscous material (D) by means of the electrically drivable machine (1) so that the (still) conveyable amount of the viscous material (D) estimated according to step c) is continuously updated.

3. The method according to any one of the preceding claims, characterized in that The electrically drivable machine (1) has an electrical energy storage device (2), and - when determining the energy reserve (EV) according to step b), taking into account the amount of energy (ES) stored in the electrical energy storage device (2), In particular, the electrical energy storage device (2) is charged with electrical energy when receiving a charging power (PL), and the charging power (PL) is taken into account when determining the energy reserve (EV) according to step b).

4. The method according to any one of the preceding claims, characterized in that The electrically drivable machine (1) has an electric drive (3) for conveying the viscous material (D), and - supplying the electric drive (3) with electrical energy from an electrical energy storage device (2) of the electrically drivable machine (1) in order to convey the viscous material (D), In particular, the electrically drivable machine (1) has an electrical connection (4) for connecting its electric drive (3) and / or its electrical energy storage device (2) to an (external) power supply network (V).

5. The method according to any one of the preceding claims, characterized in that When carrying out step a), an energy requirement / quantity unit quotient is determined which estimates the energy required for conveying a predefined quantity unit of the viscous material (D).

6. The method according to any one of the preceding claims, characterized in that The method comprises the following additional steps: d) operating the electrically drivable machine (1) based on the conveyable quantity (D) of the viscous material (D) estimated according to step c).

7. The method according to any one of the preceding claims, characterized in that The electrically drivable machine (1) has an electrical energy storage device (2), and - In carrying out step a), based on - the instantaneous electrical power (PG) provided by the electrical energy storage device (2) and / or - the temporal profile of the electrical power (PG) provided by the electrical energy storage device (2) To determine the energy requirement (EB) associated with a predefined quantity unit.

8. The method according to claim 7, characterized in that The shorter the time period since the resumption of the viscous material delivery operation, the higher the time profile of the electrical power (PG) provided by the electrical energy storage device (2) is weighted with respect to the instantaneous electrical power (PG) provided by the electrical energy storage device (2) during the implementation of step a).

9. The method according to claim 7 or 8, characterized in that: - the instantaneous electrical power delivery (PF) is drawn exclusively via the electrical connection (4) of the electrically driven machine (1), as long as the electrical power delivery (PF) does not exceed the maximum electrical connection power (PA), and As soon as the electrical delivery power (PF) exceeds the maximum electrical connection power (PA), the instantaneous electrical delivery power (PF) is taken via the electrical connection (4) at its maximum electrical connection power (PA) and additionally from the electrical energy storage device (2).

10. The method according to claim 9, characterized in that As long as the electrical feed capacity (PF) does not exceed the maximum electrical connection capacity (PA), the electrical energy storage device (2) is charged via the electrical connection (4).

11. The method according to any one of claims 7 to 10, characterized in that Based on the comparison according to step c) and the instantaneous state of charge (LZ) of the electrical energy storage device (2), the still remaining possible delivery quantity of the viscous material (D) is calculated and visualized.

12. The method according to any one of claims 7 to 11, characterized in that In particular, based on the comparison according to step c), it is calculated and visualized which portion of the still remaining possible delivery volume of the viscous material (D) is based on the electrical power (PB) drawn via the electrical connection (4) and which portion of the still remaining possible delivery volume of the viscous material (D) is based on the electrical power (PG) drawn from the electrical energy storage device (2).

13. The method according to any one of claims 7 to 12, characterized in that A desired delivery quantity can be predefined, wherein it is calculated whether the desired delivery quantity can be delivered based on the comparison according to step c) and the instantaneous state of charge (LZ) of the electrical energy storage device (2).

14. The method according to claim 13, characterized in that The electrically drivable machine (1) for conveying a viscous material (D) has different operating modes which differ in their energy requirement (EB) per predetermined unit quantity conveyed, wherein one of the operating modes is selected, in particular when carrying out step c), based on the desired conveyed quantity and on the instantaneous state of charge (LZ) of the electrical energy storage device (2).

15. The method according to any one of the preceding claims, characterized in that The method additionally comprises at least one of the following steps e) and f): e) outputting, in particular displaying, a range value based on the comparison according to step c), wherein the range value in particular reflects - the amount of energy (ES) stored in the electrical energy storage device (2) of the electrically drivable machine (1), and / or - how large is the amount of viscous material (D) which can (still) be conveyed with the aid of the energy reserve (EV), in particular in multiples of the capacity of a truck mixer or other volumetric units; f) determining, in particular inputting, a desired delivery volume and outputting, in particular displaying, a feasibility attribute based on the comparison according to step c) and the desired delivery volume, wherein the feasibility attribute reflects in particular - whether the desired delivery volume is covered by the deliverable volume of the viscous material (D), and / or - whether and / or to what extent the desired delivery amount exceeds or falls short of the deliverable amount of the viscous material (D).

16. A system (10) comprising: - an electrically drivable machine (1) for conveying viscous materials (D), an electronic computing unit (11), in particular a control device, which is connected to the electrically drivable machine (1), in particular for data transmission, - wherein the electronic computing unit (11) is configured to carry out the method according to any one of the preceding claims, In particular, the electrically drivable machine (1) comprises an electric drive (3) and an electric energy storage device (2) for storing at least a portion of an energy reserve (EV) for supplying the electric drive (3).

Images