DE102020200245A1 - Method for operating an electrical energy store, electrical energy store and device - Google Patents

Abstract

A method for operating an electrical energy store (7), an electrical energy store (7) and a device, comprising process steps, wherein in a first process step the electrical energy store (7) is connected to a charging device (2), and in a second process step a charging process or a The discharge process of the electrical energy store (7) is started, the electrical energy store (7) being charged or discharged by means of the charging device (2), with at least one operating parameter of the electrical energy store (7) in a third method step during the charging process and / or the discharging process. is recorded as a function of time, wherein in a fourth method step a capacity and / or a resistance and / or a state of health of the electrical energy store (7) is determined by means of at least one operating parameter for a defined state of charge, with operation in a fifth method step parameters and / or the capacity and / or the resistance and / or the state of health of the electrical energy store (7) is sent to an external database (4), in particular to a cloud database, the charging process or the discharging process in a sixth method step is ended and the electrical energy store (7) is separated from the charging device (2).

Description

Field of invention

The present invention relates to a method for operating an electrical energy store, an electrical energy store and a device.

State of the art

The US 2015/0084601 A1 discloses a method for determining a state of charge, a state of health and a capacity of a battery.

The US 2014/026606 A1 shows a method for determining a state of charge of a battery by means of a voltage differential.

Disclosure of the invention

The essence of the invention in the method for operating an electrical energy store is that the method has the following sequential process steps, wherein in a first process step the electrical energy store is connected to a charging device, with a charging process or a discharging process in a second process step electrical energy store is started, the electrical energy store being charged or discharged by means of the charging device, wherein in a third method step during the charging process and / or the discharging process, at least one operating parameter of the electrical energy store is recorded as a function of time, in a fourth method step using at least We determine an operating parameter for a defined state of charge of the electrical energy store, a capacity and / or a resistance and / or a state of health of the electrical energy store d, wherein in a fifth method step the operating parameter and / or the capacity and / or the resistance and / or the state of health of the electrical energy storage device is sent to an external database, in particular to a cloud database, wherein in a sixth method step the charging process or the discharge process is ended and the electrical energy store is disconnected from the charging device.

The background to the invention is that the quality and durability of the electrical energy store can be assessed by means of the capacity and / or the resistance and / or the state of health of the electrical energy store. Because these values are stored in an external, in particular central, database, the electrical energy store can be managed centrally. The values can be stored in a forgery-proof manner and used, for example, to determine the residual value of the electrical energy store.

Further advantageous embodiments of the present invention are the subject of the subclaims.

According to an advantageous embodiment, in the fourth method step, the capacitance and / or the resistance and / or the state of health of the electrical energy store is determined by means of an evaluation unit of the external database. The advantage here is that the evaluation unit can be arranged centrally in the external database, which means that the electrical energy store and / or the device can be implemented in a simplified manner.

According to a further advantageous embodiment, in the fourth method step, the capacitance and / or the resistance and / or the state of health of the electrical energy store is determined by means of an evaluation unit of the electrical energy store and / or the charging device. The advantage here is that only the capacity and / or the resistance and / or the state of health is sent to the external database. This means that the volume of data sent can be reduced.

According to a further advantageous embodiment, in the fourth method step, the capacitance and / or the resistance and / or the state of health of the electrical energy store is determined by means of an evaluation unit of the electrical energy store and / or the charging device and the external database. The advantage here is that the capacity and / or the resistance and / or the state of health can be determined redundantly. This improves security.

It is advantageous if the fourth method step is carried out first and then the fifth method step. In this case, the capacity and / or the resistance and / or the state of health are first determined by an evaluation unit of the electrical energy store and / or the device and then sent to the external database.

According to a further advantageous embodiment, the fifth method step and then the fourth method step are carried out first. First, the at least one operating parameter is sent to the external database and then the capacity and / or the resistance and / or the state of health is determined by an evaluation unit in the external database.

Furthermore, it is advantageous if the method is continued after a charging process in the second method step and a third method step with an unloading process in the second method step or the method is continued after a discharging process in the second method step and third method step with a charging process in the second method step, with the fourth Process step operating parameters from the charging process and from the discharging process are used. By using the operating parameters from the charging process and the discharging process, the accuracy in determining the capacity and / or the resistance and / or the state of health can be improved.

Advantageously, in the fifth method step, the operating parameter and / or the capacity and / or the resistance and / or the state of health of the electrical energy store is transmitted to the external by means of a transceiver unit of the charging device and / or the electrical energy store and / or a device having the electrical energy store Database sent.

It is also advantageous if the electrical energy store is charged to a maximum state of charge and / or is discharged to a minimum state of charge. As a result, the accuracy in determining the capacitance and / or the resistance and / or the state of health can be improved.

The operating parameter is advantageously a voltage and / or a temperature and / or a current and / or a state of charge. These operating parameters can be determined in a simple manner.

It is also advantageous if, in the fourth method step, the defined state of charge is a minimum state of charge and / or a maximum state of charge and / or an average value between the maximum state of charge and the minimum state of charge. As a result, the accuracy in determining the capacitance and / or the resistance and / or the state of health can be improved.

The essence of the invention in the case of the electrical energy store is that the electrical energy store is set up to be operated by means of a method as described above or according to one of the claims relating to the method.

The background to the invention is that the quality and durability of the electrical energy store can be assessed by means of the capacity and / or the resistance and / or the state of health of the electrical energy store. Because these values are stored in an external, in particular central, database, the electrical energy store can be managed centrally. The values can be stored in a forgery-proof manner and used, for example, to determine the residual value of the electrical energy store.

It is advantageous here if the electrical energy store has a transceiver unit for a data-conducting connection to the external database. As a result, an operating parameter and / or a capacitance and / or a resistance and / or a state of health can be sent directly from the electrical energy store to the external database.

The essence of the invention in the device, in particular the vehicle, is that the device has an electrical energy store as described above or according to one of the claims relating to the electrical energy store.

The background to the invention is that the quality and durability of the electrical energy store can be assessed by means of the capacity and / or the resistance and / or the state of health of the electrical energy store. Because these values are stored in an external, in particular central, database, the electrical energy store can be managed centrally. The values can be stored in a forgery-proof manner and used, for example, to determine the residual value of the electrical energy store and the device connected to the electrical energy store.

It is advantageous if the device has a transceiver unit for the data-conducting connection to the external database. As a result, an operating parameter and / or a capacity and / or a resistance and / or a state of health can be sent directly from the device to the external database. The electrical energy store can thereby be implemented in a simplified manner.

The above configurations and developments can be combined with one another as desired, provided that it makes sense. Further possible configurations, developments and implementations of the invention also include combinations of features of the invention that are not explicitly mentioned above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

Figure list

In the following section, the invention is explained on the basis of exemplary embodiments from which further inventive features can result, but to which the scope of the invention is not restricted. The exemplary embodiments are shown in the drawings.

• 1 eine schematische Darstellung einer erfindungsgemäßen Vorrichtung, insbesondere eines Fahrzeugs 1, an einer Ladevorrichtung 2,
• 2 eine weitere schematische Darstellung einer erfindungsgemäßen Vorrichtung, insbesondere eines Fahrzeugs 1, an einer Ladevorrichtung 2 und
• 3 eine schematische Darstellung eines erfindungsgemäßen Verfahrens 100 zum Betreiben eines elektrischen Energiespeichers 7.

Show it:

• 1 a schematic representation of a device according to the invention, in particular a vehicle 1 , on a loading device 2 ,
• 2 a further schematic representation of a device according to the invention, in particular a vehicle 1 , on a loading device 2 and
• 3 a schematic representation of a method according to the invention 100 for operating an electrical energy store 7th .

In 1 is a vehicle 1 shown, the one with a loading device 2 , in particular a charging station.

The vehicle 1 has at least one electrical energy store 7th on. Preferably the vehicle is 1 executed as an electrically powered vehicle or as a hybrid vehicle that has an electric motor.

The electrical energy storage 7th is set up from the loading device 2 with electrical charging energy 3 to be fed.

The vehicle 1 and / or the electrical energy store 7th is by means of a wireless data connection 5 with an external database 4th , in particular a cloud database, can be connected. The vehicle instructs you to do this 1 and / or the electrical energy store 7th a transceiver unit.

As an alternative or in addition, there is the charging device 2 by means of another data connection 6th , in particular by means of another wireless data connection 6th , with an external database 4th , in particular a cloud database, can be connected. To this end, the loading device 2 another transceiver unit.

In 2 Figure 3 is another schematic representation of the vehicle 1 on the loading device 2 shown.

In addition to the in 1 The illustration shown is the vehicle 1 set up electrical energy 8th from the electrical energy store by means of the charging device 2 to feed back into an electrical network or the electrical energy 8th to use to charge another electrical energy store.

In 3 is the method according to the invention 100 for operating an electrical energy store 7th shown schematically.

• In einem ersten Verfahrensschritt 101 wird der elektrische Energiespeicher 7 mit der Ladevorrichtung 2 verbunden.
• In einem zweiten Verfahrensschritt 102 wird ein Ladevorgang oder ein Entladevorgang des elektrischen Energiespeichers 7 gestartet. Dabei wird der elektrische Energiespeicher 7 mittels der Ladevorrichtung 2 geladen oder entladen.
• In einem dritten Verfahrensschritt 103 wird während des Ladevorgangs und/oder Entladevorgangs zumindest ein Betriebsparameter des elektrischen Energiespeichers 7, insbesondere eine Spannung und/oder eine Temperatur und/oder ein Strom und/oder ein Ladezustand, als Funktion der Zeit erfasst.
• In einem vierten Verfahrensschritt 104 wird mittels zumindest eines Betriebsparameters für einen definierten Ladezustand, insbesondere von 0 % und/oder 50 % und/oder 100 %, eine Kapazität und/oder ein Widerstand und/oder ein Gesundheitszustand des elektrischen Energiespeichers 7 bestimmt.
• In einem fünften Verfahrensschritt 105 wird der Betriebsparameter und/oder die Kapazität und/oder der Widerstand und/oder der Gesundheitszustand des elektrischen Energiespeichers 7 an eine externe Datenbank 4, insbesondere eine Cloud-Datenbank, gesendet.

The procedure 100 has the following procedural steps, especially those that follow one another in time:

• In a first process step 101 becomes the electrical energy storage 7th with the loading device 2 connected.
• In a second process step 102 becomes a charging process or a discharging process of the electrical energy store 7th started. This is the electrical energy storage 7th by means of the loading device 2 charged or discharged.
• In a third process step 103 becomes at least one operating parameter of the electrical energy store during the charging and / or discharging process 7th , in particular a voltage and / or a temperature and / or a current and / or a state of charge, recorded as a function of time.
• In a fourth process step 104 a capacity and / or a resistance and / or a state of health of the electrical energy store is determined by means of at least one operating parameter for a defined state of charge, in particular of 0% and / or 50% and / or 100% 7th certainly.
• In a fifth process step 105 becomes the operating parameter and / or the capacity and / or the resistance and / or the state of health of the electrical energy store 7th to an external database 4th , especially a cloud database.

The capacity and / or the resistance and / or the state of health are determined by means of an evaluation unit of the electrical energy store 7th and / or the charging device 2 and / or the external database 4th carried out. To do this, the fourth process step is required first 104 and then the fifth step 105 or the fifth step first 105 and then the fourth step 104 carried out.

In a sixth process step 106 the charging process or the discharging process is ended and the electrical energy store 7th is from the loading device 2 Cut.

The electrical energy store is preferably used 7th charged to a maximum state of charge.

More preferably, the method begins 100 after a charging process in the second process step 102 and third process step 103 again with the second process step 102 a discharge process or the process 100 begins after a discharge process in the second process step 102 and third process step 103 again with the second process step 102 a charging process. In the fourth process step 104 used to determine the capacity and / or the resistance and / or the state of health operating parameters from the charging process and from the discharging process.

An electrical energy store is understood here to be a rechargeable energy store, in particular having an electrochemical energy storage cell and / or an energy storage module having at least one electrochemical energy storage cell and / or an energy storage pack having at least one energy storage module. The energy storage cell can be implemented as a lithium-based battery cell, in particular a lithium-ion battery cell. Alternatively, the energy storage cell is designed as a lithium polymer battery cell or a nickel-metal hydride battery cell or a lead-acid battery cell or a lithium-air battery cell or a lithium-sulfur battery cell.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• US 2015/0084601 A1 [0002]
• US 2014026606 A1 [0003]

Claims (12)

Method for operating an electrical energy store (7) having method steps that follow one another in time, wherein in a first method step (101) the electrical energy store (7) is connected to a charging device (2), wherein in a second method step (102) a charging process or a discharging process of the electrical energy store (7) is started, the electrical energy store (7) being charged or discharged by means of the charging device (2), wherein in a third method step (103) during the charging process and / or the discharging process, at least one operating parameter of the electrical energy store (7) is recorded as a function of time, wherein in a fourth method step (104) a capacity and / or a resistance and / or a state of health of the electrical energy store (7) is determined by means of at least one operating parameter for a defined state of charge of the electrical energy store (7), wherein in a fifth method step (105) the operating parameters and / or the capacity and / or the resistance and / or the state of health of the electrical energy store (7) is sent to an external database (4), in particular to a cloud database, wherein in a sixth method step (106) the charging process or the discharging process is ended and the electrical energy store (7) is separated from the charging device (2). Method (100) according to Claim 1 , characterized in that in the fourth method step (104) the capacity and / or the resistance and / or the state of health of the electrical energy store (7) by means of an evaluation unit of the electrical energy store (7) and / or the charging device (2) and / or the external database (4) is determined. Method (100) according to one of the preceding claims, characterized in that first the fourth method step (104) and then the fifth method step (105) or first the fifth method step (105) and then the fourth method step (104) is carried out. The method (100) according to any one of the preceding claims, characterized in that the method (100) is continued after a loading process in the second process step (102) and third process step (103) with an unloading process in the second process step (102) or the process (100) ) is continued after a discharging process in the second method step (102) and third method step (103) with a charging process in the second method step (102), operating parameters from the charging process and from the discharging process being used in the fourth method step (104). The method (100) according to any one of the preceding claims, characterized in that in the fifth method step (105) the operating parameter and / or the capacity and / or the resistance and / or the state of health of the electrical energy store (7) by means of a transceiver unit of the charging device (2) and / or the electrical energy store (7) and / or a device having the electrical energy store is sent to the external database (4). Method (100) according to one of the preceding claims, characterized in that the electrical energy store (7) is charged up to a maximum state of charge and / or is discharged to a minimum state of charge. Method (100) according to one of the preceding claims, characterized in that the operating parameter is a voltage and / or a temperature and / or a current and / or a state of charge. The method (100) according to any one of the preceding claims, characterized in that in the fourth method step (104) the defined state of charge is a minimum state of charge and / or a maximum state of charge and / or an average value between the maximum state of charge and the minimum state of charge. Electrical energy store (7), characterized in that the electrical energy store is set up to be operated by means of a method (100) according to one of the preceding claims. Electrical energy storage (7) according to Claim 9 , characterized in that the electrical energy store (7) has a transceiver unit for the data-conducting connection to the external database (4). Device, in particular vehicle (1), having an electrical energy store (7) Claim 9 or 10 . Device according to Claim 11 , characterized in that the device has a transceiver unit for the data-conducting connection to the external database (4).

Images