Adaptive adjustment of combination of rechargeable batteries

Abstract

A method for controlling and regulating a system comprising at least a first rechargeable battery having a first transceiver and a first storage unit, a second rechargeable battery having a second transceiver and a second storage unit, a first charging device having a third transceiver, and a second charging device having a fourth transceiver, each rechargeable battery includes at least one sensor for recording at least one parameter. A system for performing the method, the system comprising at least a first rechargeable battery and a second rechargeable battery, at least a first charging device and a second charging device, and at least a first power tool and a second power tool, the first rechargeable battery and the second rechargeable battery each include a first transceiver and a first storage unit, the first charging device and the second charging device each include a second transceiver and a second storage unit, and the first power tool and the second power tool each include a third transceiver and a third storage unit.

Description

TECHNICAL FIELD

[0001] The present invention relates to a method for controlling and regulating a system comprising at least a first rechargeable battery having a first transceiver and a first storage unit, a second rechargeable battery having a second transceiver and a second storage unit, a first charging device having a third transceiver, and a second charging device having a fourth transceiver, wherein each rechargeable battery comprises at least one sensor for recording at least one parameter.

[0002] The present invention further relates to a system for performing the method comprising at least a first rechargeable battery and a second rechargeable battery, at least a first charging device and a second charging device, and at least a first power tool and a second power tool, wherein the first rechargeable battery and the second rechargeable battery each comprise a first transceiver and a first storage unit, the first charging device and the second charging device each comprise a second transceiver and a second storage unit, and the first power tool and the second power tool each comprise a third transceiver and a third storage unit. BACKGROUND

[0003] According to the prior art, rechargeable batteries, also referred to as batteries, are largely known as power sources for power tools. These rechargeable batteries usually comprise a plurality of energy storage cells, also referred to as rechargeable battery cells, for receiving, storing and delivering electrical energy. The reception of electrical energy into the energy storage cells can also be referred to as charging (or recharging). The delivery of electrical energy from the energy storage cells can also be referred to as discharging.

[0004] For charging or recharging with electrical energy, the rechargeable battery is usually connected to a charging device, also referred to as a charger. The charging device conducts electrical energy according to a predetermined charging setting, also referred to as a charging mode, which has defined parameters for the actual charging process of the individual energy storage cells of the rechargeable battery.

[0005] In order to achieve a nearly optimal charging of the rechargeable battery with electrical energy and a nearly optimal discharging of the rechargeable battery, i.e. the re-delivery of the energy stored in the rechargeable battery to, for example, a power tool, the parameters of the rechargeable battery should be between a minimum threshold value and a maximum threshold value. Operating the rechargeable battery, i.e. charging and discharging the rechargeable battery, outside the threshold values can result in significantly longer charging times, smaller capacities and / or lower discharging current values.

[0006] It is only difficult to ensure that the parameters of the rechargeable battery are maintained within the desired range or between the threshold values, in particular when the rechargeable battery is used outdoors and under extreme weather conditions. SUMMARY

[0007] It is an object of the present invention to solve the above-mentioned problems.

[0008] This object is also achieved by the subject-matter of claim 1 and the subject-matter of claim 4. Further advantageous embodiments of the application are described in the corresponding dependent claims.

[0009] This object is achieved in particular by a method for controlling and regulating a system comprising at least a first rechargeable battery having a first transceiver and a first storage unit, a second rechargeable battery having a second transceiver and a second storage unit, a first charging device having a third transceiver, and a second charging device having a fourth transceiver, wherein each rechargeable battery contains at least one sensor for recording at least one parameter.

[0010] According to the application, the following method steps are provided:

[0011] - recording at least one characteristic operating value by means of at least one sensor of the respective rechargeable battery;

[0012] - connecting at least the first rechargeable battery to the first charging device and at least the second rechargeable battery to the second charging device;

[0013] - transmitting at least one characteristic operating value of the first rechargeable battery recorded by the sensor from the first rechargeable battery to the first charging device before the start of the charging process and at least one characteristic operating value of the second rechargeable battery recorded by the sensor from the second rechargeable battery to the second charging device before the start of the charging process;

[0014] - transmitting the at least one characteristic operating value of the first rechargeable battery from the first charging device to a data storage and computing device and the at least one characteristic operating value of the second rechargeable battery from the second charging device to the data storage and computing device;

[0015] - comparing the parameters of the first rechargeable battery and the second rechargeable battery with threshold values stored in the data storage and computing device;

[0016] - comparing the respective characteristic operating values with threshold values stored in the data storage and computing device;

[0017] - if at least one characteristic operating value exceeds the threshold values stored in the data storage and computing device for a predetermined period of time and a predetermined number, at least one second regulation parameter is transmitted from the data storage and computing device to the first rechargeable battery and / or the second rechargeable battery via the charging device in order to replace a first regulation parameter stored in the first rechargeable battery and / or the second rechargeable battery, respectively; and

[0018] - charging the at least one rechargeable battery with electrical energy by means of the charging device using at least the second adjustment parameter.

[0019] According to an advantageous embodiment, the following method steps

[0020] - transmitting at least one first adjustment parameter of the rechargeable battery from the rechargeable battery to the charging device before the start of the charging process

[0021] may be included.

[0022] According to an advantageous embodiment, the following method steps

[0023] - connecting at least the first rechargeable battery or at least the second rechargeable battery to the power tool;

[0024] - supplying the power tool with electrical energy by discharging at least the first rechargeable battery or the second rechargeable battery using at least the second adjustment parameter

[0025] may be included.

[0026] The object is also achieved by a system for carrying out the method, comprising at least a first rechargeable battery and a second rechargeable battery, at least a first charging device and a second charging device, and at least a first power tool and a second power tool, wherein the first rechargeable battery and the second rechargeable battery each comprise a first transceiver and a first storage unit, the first charging device and the second charging device each comprise a second transceiver and a second storage unit, and the first power tool and the second power tool each comprise a third transceiver and a third storage unit. BRIEF DESCRIPTION OF DRAWINGS

[0027] Further advantages emerge from the following description of the drawings. In the drawings, particularly preferred exemplary embodiments of the application are shown. The drawings, specification, and claims contain numerous combinable features. The person skilled will also expediently consider these features individually and combine them to form further reasonable combinations.

[0028] In the drawings, identical and similar components are denoted by the same reference signs,

[0029] In the drawings:

[0030] Figure 1 a side view of a power tool with rechargeable batteries according to a first exemplary embodiment is shown;

[0031] Figure 2 a perspective view of an interface of a power tool is shown;

[0032] Figure 3 a perspective view of a rechargeable battery is shown;

[0033] Figure 4 a perspective view of a charging device is shown; and

[0034] Figure 5 a schematic view of a system is shown, the system having a first power tool with a first rechargeable battery, a second power tool with a second rechargeable battery, a third power tool with a third rechargeable battery, a first charging device to which the first rechargeable battery can be connected, a second charging device to which the second rechargeable battery can be connected, a third charging device to which the third rechargeable battery can be connected, and a data storage and computing device. DETAILED DESCRIPTION

[0035] Figure 5 A system S is shown, the system having a first power tool la, a second power tool lb and a third power tool lc, each connected to a first rechargeable battery 2a, a second rechargeable battery 2b and a third rechargeable battery 2c, and a first charging device 22a, a second charging device 22b and a third charging device 22c. In the present exemplary embodiment, the power tools la, lb, lc, the rechargeable batteries 2a, 2b, 2c and the charging devices 22a, 22b, 22c are essentially identical in structure.

[0036] Alternatively, the system S can also contain more or less than three power tools, charging devices and rechargeable batteries.

[0037] In the present exemplary embodiment, the power tools la, lb, lc are designed as cordless screwdrivers, for example. The power tools la, lb, lc can also be designed as drills, hammer drills, saws, grinders, etc.

[0038] As indicated, each power tool la, lb, lc essentially contains a housing 3, a handle 4 and a tool fitting 5. Inside the housing 3, a driver 6 in the form of an electric motor, a gear device 7, an output shaft 8, a control unit 9, a storage unit 10 and a transceiver 11 are positioned. Figure 1 The driver 6, the gear device 7 and the output shaft 8, which are configured as an electric motor, are arranged relative to one another such that a torque generated by the electric motor 6 can be transmitted to the tool fitting 5 via the output shaft 8 and the gear device 7. The tool fitting 5 is positioned at a front end 3a of the housing 3 and serves to receive and hold a tool. In the embodiment of a cordless screwdriver, the tool can be designed as a screwdriver bit. The tool is not shown in the figures.

[0039]

[0040] ​The handle 4 is positioned on the lower side 3b of the housing 3. The handle 4 is fastened to the lower side 3b of the housing 3 by a first end 4a. The power tool interface 12 is positioned at a second end 4b of the handle 4 and serves to electrically or electronically and mechanically connect the power tool 1 to the rechargeable battery 2. For the electrical or electronic connection, the power tool 1 has a positive contact 13a, a negative contact 13b and a communication contact 13c. The positive contact 13a and the negative contact 13b serve to create a circuit when the rechargeable battery 2 is connected to the power tool 1. The communication contact 13c serves to transmit and receive data and information in the form of electrical signals.

[0041] The actuation switch 14 is provided at a front end 4c of the handle 4. The actuation switch 14 serves to activate the power tool 1. The control unit 9 is positioned together with the transceiver 11 and the storage unit 10 inside the handle 4. The individual functions of the power tool 1 are controlled and regulated by means of the control unit 9. These functions include, for example, setting a specific speed of the electric motor 6.

[0042] The rechargeable battery 2 can be removably connected to the power tool 1 in order to supply the power tool 1 with electrical energy.

[0043] Each rechargeable battery 2 essentially comprises a rechargeable battery housing 15, a plurality of energy storage cells 16, a rechargeable battery interface 17, a storage unit 18, a transceiver 19, a control device 20 and a plurality of sensors.

[0044] The energy storage cells 16 can also be designated as rechargeable battery cells and are arranged inside the rechargeable battery housing 15.

[0045] The rechargeable battery housing 15 essentially comprises a cover element 15a, four side walls 15b and a base element 15c.

[0046] The rechargeable battery interface 17 is arranged on the outside of the cover element 15a and serves to electrically or electronically and mechanically connect the rechargeable battery 2 to the power tool 1 or to a charging device 22.

[0047] For the electrical or electronic connection, the rechargeable battery interface 17 has a positive contact 17a, a negative contact 17b and a communication contact 17c. The positive contact 17a and the negative contact 17b serve to create a circuit when the rechargeable battery 2 is connected to the power tool 1 or to the charging device 22. The communication contact 17c serves to transmit and receive data and information in the form of electrical signals.

[0048] Alternatively or additionally, the rechargeable battery 2 can also comprise a radio communication, for example Bluetooth, or a wireless communication.

[0049] The energy storage cells 16 serve to receive, store and re-deliver electrical energy. As indicated in the drawing, the energy storage cells 16 are cylindrical and are based on lithium-ion technology. Each energy storage cell 16 contains a contact device for the transmission of electrical energy at one end. The individual contact devices are connected to the control device 20 of the rechargeable battery 2 via corresponding lines.

[0050] Alternatively, the energy storage cells 16 can also be based on another suitable technology.

[0051] The cylindrical shape of the energy storage cells 16 is also optional, so that any other suitable shape or geometry can also be selected. Thus, in particular, it is also possible that the energy storage cells are configured as pouch cells.

[0052] In addition, it is also possible that the rechargeable battery 2 contains both cylindrical energy storage cells and pouch cells. It is particularly possible that the rechargeable battery 2 contains only a single cylindrical energy storage cell 16 and a single pouch cell.

[0053] The control device 20 regulates and controls various functions of the rechargeable battery 2. These functions include, among others, controlling the reception of electrical energy into the energy storage cells 16 and the delivery of electrical energy from the energy storage cells. In addition, the control device 20 serves to control the amount of electrical energy to be received or delivered by the energy storage cells 16.

[0054] A first set of regulation parameters, which contains a plurality of regulation parameters, is stored in the storage unit 18. The regulation parameters can also be referred to as regulation variables or setting parameters.

[0055] The storage unit 18 is connected to the control device 20, so that the control device 20 has access to the individual regulation parameters stored in the storage unit 18 and can use these regulation parameters to control or regulate the functions of the rechargeable battery 2. The regulation parameters include a maximum discharge current (current strength value), a maximum charge current (current strength value), a minimum charging time and a maximum charging time, a minimum internal resistance and a maximum internal resistance, and a minimum capacity value and a maximum capacity value (in Ah).

[0056] The regulation parameters also include methods for reducing or completely preventing the energy storage cells 16 from receiving or delivering energy in the event of a maximum acceleration value or braking value, a predetermined number of braking values within a predetermined threshold value, and a minimum temperature value and a maximum temperature value.

[0057] The rechargeable battery 2 also contains sensors for recording characteristic operating values in each case. The characteristic operating values can also be referred to as operating parameters, operating variables or operating values.

[0058] In particular, the rechargeable battery 2 comprises a sensor 30 for recording the charging current intensity and the discharging current intensity, a sensor 31 for recording the charging time, a sensor 32 for recording the acceleration values and the braking values, a sensor 33 for recording the temperature values, a sensor 34 for recording the internal resistance values, a sensor 35 for recording the capacity, and a counter 36 for the number of times the acceleration values exceed a predetermined threshold value.

[0059] The sensor 31 for recording the charging time can also be referred to as a clock or a real-time clock.

[0060] The acceleration values can be referred to as positive acceleration values, and the braking values can also be referred to as negative acceleration values.

[0061] The sensor 33 for recording the temperature values can also be referred to as a thermometer or a thermometer.

[0062] The sensor 34 for recording the internal resistance values can also be referred to as an ohmmeter.

[0063] The sensor 35 for recording the capacity can also be referred to as a sensor for recording ampere hours (Ah).

[0064] According to alternative embodiments of the system or of the rechargeable battery 2, the rechargeable battery 2 can comprise more or fewer sensors.

[0065] Figure 4 The charging device 22 is shown, which essentially comprises a charger housing 23, a control unit 24, a transceiver 25, a storage unit 26 and a power supply 27. The charger housing 23 essentially comprises a cover element 23a, four side walls 23b and a base element 23c.

[0066] The charger interface 28 is positioned on the cover element 23a and serves to electrically or electronically and mechanically connect the charging device 22 to the rechargeable battery 2. For the electrical or electronic connection, the charger interface 28 has a positive contact 28a, a negative contact 28b and a communication contact 28c. The positive contact 28a and the negative contact 28b serve to create a circuit when the rechargeable battery 2 is connected to the charging device 22. The communication contact 28c serves to transmit and receive data and information in the form of electrical signals.

[0067] Alternatively or additionally, the charging device 22 can also comprise a radio communication (e.g. Bluetooth) or a wireless communication.

[0068] The power supply 27 is in the form of a power cable for connecting to a not shown mains power supply (i.e. a socket).

[0069] The control unit 24, the transceiver 25 and the storage unit 26 are positioned inside the charger housing 23. The control unit 24 controls and regulates the various functions of the charging device 22. These functions include, inter alia, setting the charging current, i.e. the current intensity value, when the rechargeable battery 2 is removably connected to the charging device 22 for charging. The transceiver 25 is used for sending and receiving data and information in the form of electrical signals.

[0070] As Figure 5 indicated, the charging device 22 is in particular designed to exchange data and information with the data storage and computing device 29. The data storage and computing device 29 contains a transceiver 37, a computing unit 38 and a storage unit 39.

[0071] The data storage and computing device 29 can also be referred to as a cloud or cloud computer.

[0072] To perform the method, the rechargeable battery 2 is first connected to the power tool 1 so that electrical energy from the energy storage cells 16 can reach the load of the power tool 1, see Figure 1 The respective interfaces of the rechargeable battery 2 and the power tool 1 are removably connected to each other. Connecting the rechargeable battery 2 to the power tool 1 also makes it possible to exchange data and information between the rechargeable battery 2 and the power tool 1 in the form of electrical signals. The respective transceivers 19, 25 of the rechargeable battery 2 and the power tool 1 and the respective interconnected communication contacts 13c, 17c are used to send and receive electrical signals.

[0073] During the use of the rechargeable battery 2 as a power source for the power tool 1, the sensors of the rechargeable battery 2 record the various characteristic operating values described above. Only some of these sensors can record data. The characteristic operating values recorded by the sensors are stored in the storage unit.

[0074] As Figure 5 indicated, the rechargeable battery 2 can be removed from the respective power tool 1 and can be removably connected to the charging device 22. The energy storage cells 16 of the rechargeable battery 2 can be charged with electrical energy by means of the charging device.

[0075] In the present exemplary embodiment, it is indicated that the first rechargeable battery 2a, the second rechargeable battery 2b and the third rechargeable battery 2c are simultaneously removed from the respective power tool la, lb, lc and simultaneously connected to the respective charging device 22a, 22b, 22c. However, it is also possible that the rechargeable batteries 2a, 2b, 2c are not simultaneously removed from the power tool and not simultaneously connected to the charging device. It can be done separately for each rechargeable battery 2a, 2b, 2c to remove the respective rechargeable battery 2a, 2b, 2c from the power tool la, lb, lc and to connect the respective rechargeable battery 2a, 2b, 2c to the respective charging device 22a, 22b, 22c, the result of which is that all rechargeable batteries 2a, 2b, 2c are removed from the power tool la, lb, lc and connected to the charging device 22a, 22b, 22c within a certain period of time. This period of time can be several hours or several days.

[0076] In addition, it is also possible to repeatedly connect more than one rechargeable battery to a single charging device.

[0077] Furthermore, it is also possible to alternately connect the rechargeable batteries 2a, 2b, 2c to different charging devices 22a, 22b, 22c.

[0078] The respective interfaces of the rechargeable battery 2a, 2b, 2c and the charging device 22a, 22b, 22c are removably contactingly connected to one another, so that the respective communication contacts 17c, 28c of the rechargeable battery 2 and the charging device 22 are in contact with one another. Connecting the rechargeable battery 2 to the charging device 22 also makes it possible to exchange data and information in the form of electrical signals between the rechargeable battery 2 and the charging device 22. The respective transceivers 19, 25 of the rechargeable battery 2 and the charging device 22 are used to transmit and receive electrical signals.

[0079] Before the actual charging process begins, i.e. before electrical energy from the charging device 22 reaches the energy storage cells 16 of the rechargeable battery 2, the rechargeable battery 2 transmits the characteristic operating value stored in the storage unit 18 to the charging device 22 by means of the transceivers 19, 25 and the communication contacts 17c, 28c.

[0080] Even if more than one characteristic operating value has been recorded by the sensor, only a single characteristic operating value can be transmitted to the charging device 22.

[0081] The charging device 22 stores the received characteristic operating value in a storage unit 26 of the charging device 22.

[0082] When the charging device 22 is connected to the data storage and computing device 29, the characteristic operating values are transmitted to the data storage and computing device 29. Once the corresponding charging device 22 is connected to the data storage and computing device 29, each charging device 22 transmits the received characteristic operating values to the data storage and computing device 29.

[0083] The threshold values of the corresponding characteristic operating values recorded by the sensors of the rechargeable battery 2 are stored in the data storage and computing device 29.

[0084] Furthermore, the individual adjustment parameters for a plurality of different rechargeable batteries 2 as well as the overall adjustment parameters are stored in the data storage and computing device 29.

[0085] A predetermined amount of characteristic operating values of the same category is collected in the data storage and computing device 29 over a predetermined period of time. The characteristic operating values of the same category are collected over a certain period of time for as comprehensive a representation as possible of the respective operating states of all rechargeable batteries 2a, 2b, 2c belonging to the system S. The greater the amount of characteristic operating values collected, the more clearly the respective operating states of the rechargeable batteries 2a, 2b, 2c can be represented, but also explained. The predetermined period of time can be several hours or several days. The predetermined amount or number of characteristic operating values can be several tens or several hundred characteristic operating values of the same category.

[0086] The collected characteristic operating values are compared with the respective threshold values in the data storage and computing device 29. If the characteristic operating values of one category exceed the corresponding threshold values over the predetermined period of time and for the predetermined amount or number, new adjustment parameters are transmitted from the data storage and computing device 29 to all charging devices 22a, 22b, 22c.

[0087] The new adjustment parameters are then transmitted from the charging devices 22a, 22b, 22c to the respective connected rechargeable batteries 2a, 2b, 2c. In addition, the new adjustment parameters can be stored in the charging devices 22a, 22b, 22c and transmitted to different rechargeable batteries 2a, 2b, 2c subsequently connected to the charging devices 22a, 22b, 22c.

[0088] In the control device of the rechargeable battery 2a, 2b, 2c, the received new adjustment parameters are used to replace the corresponding adjustment parameters. This corresponding adjustment parameter can also be referred to as the previous or old adjustment parameter.

[0089] According to alternative exemplary embodiments, more than a single new adjustment parameter can also be sent from the data storage and computing device 29 to the charging device 22a, 22b, 22c if more than one characteristic operating value exceeds the corresponding threshold value. In addition, one or more new adjustment parameters can also be sent from the data storage and computing device 29 to the charging device 22a, 22b, 22c if one or more recorded characteristic operating values have not exceeded the corresponding threshold value, but rather the recorded characteristic operating values only correspond to these threshold values.

[0090] Furthermore, it is also possible that instead of one or more new adjustment parameters for replacing the corresponding adjustment parameters, a completely new set of adjustment parameters is sent from the data storage and computing device 29 to the charging device 22a, 22b, 22c and finally to the rechargeable battery 2a, 2b, 2c. The existing set of adjustment parameters in the rechargeable battery 2a, 2b, 2c is replaced using this completely new set of adjustment parameters.

[0091] If the charging device 22a, 22b, 22c has sent a new adjustment parameter to the rechargeable battery 2a, 2b, 2c and this new adjustment parameter has replaced the previously existing corresponding adjustment parameter, the actual charging process is started taking into account the new adjustment parameter and the adjustment parameters that are still present.

[0092] If during the comparison of the received characteristic operating values with the corresponding threshold values it emerges that neither a threshold value has been exceeded nor reached, no new adjustment parameter is sent from the data storage and computing device 29a to the charging device 22a, 22b, 22c and finally to the rechargeable battery 2a, 2b, 2c. As a result, the charging process is started taking into account the adjustment parameters that are still present.

[0093] List of reference signs:

[0094] 1a first power tool

[0095] 1b second power tool

[0096] 1c third power tool

[0097] 2a first rechargeable battery

[0098] 2b second rechargeable battery

[0099] 2c third rechargeable battery

[0100] 3 housing

[0101] 3a front end of the housing

[0102] 3b lower end of the housing

[0103] 4 housing

[0104] 4a first end of the housing

[0105] 4b second end of the housing

[0106] 5 tool assembly

[0107] 6 driver

[0108] 7 gear arrangement

[0109] 8 output shaft

[0110] 9 control unit

[0111] 10 storage unit of the power tool

[0112] 11 transceiver of the power tool

[0113] 12 power tool interface

[0114] 13a positive contact of the power tool interface

[0115] 13b negative contact of the power tool interface

[0116] 13c communication contact of the power tool interface

[0117] 14 actuation switch

[0118] 15 rechargeable battery housing

[0119] 15a cover element of the rechargeable battery housing

[0120] 15b side wall of the rechargeable battery housing

[0121] 15c base element of the rechargeable battery housing

[0122] 16 energy storage cell

[0123] 17 rechargeable battery interface

[0124] 18 storage unit of the rechargeable battery

[0125] 19 transceiver of the rechargeable battery

[0126] 20 control device of the rechargeable battery

[0127] 22a first charging device

[0128] 22b second charging device

[0129] 22c third charging device

[0130] 23 charger housing

[0131] 23a cover element of the charger housing

[0132] 23b side wall of the charger housing

[0133] 23c base element of the charger housing

[0134] 24 control unit of the charging device

[0135] 25 transceiver of the charging device

[0136] 26 storage unit of the charging device

[0137] 27 power supply of the charging device

[0138] 28 charger interface

[0139] 28a positive contact of the charger interface

[0140] 28b negative contact of the charger interface

[0141] 28c communication contact of the charger interface

[0142] 29 data storage and computing device

[0143] 30 sensor for recording the charging current intensity and the discharging current intensity

[0144] 31 sensor for recording the charging time

[0145] 32 sensor for recording the acceleration value and the braking value

[0146] 33 sensor for recording the temperature value

[0147] 34 sensor for recording the internal resistance value

[0148] 35 sensor for recording the capacity

[0149] 36 counter

[0150] 37 transceiver of the data storage and computing device

[0151] 38 computing unit of the data storage and computing device

[0152] 39 storage unit of the data storage and computing device

[0153] S system.

Claims

1. A method for controlling and regulating a system (S) comprising at least a first rechargeable battery (2a) having a first transceiver (19) and a first memory unit (18), a second rechargeable battery (2b) having a second transceiver (19) and a second memory unit (18), a first charging device (22a) having a third transceiver (25), and a second charging device (22b) having a fourth transceiver (25), wherein, Each rechargeable battery (2a, 2b) contains at least one sensor (30, 31, 32, 33, 34, 35) for recording at least one parameter, characterized by the following method steps: - recording at least one characteristic operating value by means of the at least one sensor (30, 31, 32, 33, 34, 35) of the respective rechargeable battery (2a, 2b, 2c); - connecting at least a first rechargeable battery (2a, 2b, 2c) to the first charging device (22a) and at least a second rechargeable battery (2a, 2b, 2c) to the second charging device (22b); - transmitting at least one characteristic operating value of the first rechargeable battery (2a) recorded by the sensor (30, 31, 32, 33, 34, 35) from the first rechargeable battery (2a) to the first charging device (22a) before the start of the charging process and at least one characteristic operating value of the second rechargeable battery (2b) recorded by the sensor (30, 31, 32, 33, 34, 35) from the second rechargeable battery (2b) to the second charging device (22b) before the start of the charging process; - transmitting the at least one characteristic operating value of the first rechargeable battery (2a) from the first charging device (22a) to a data storage and computing device (29) and the at least one characteristic operating value of the second rechargeable battery (2b) from the second charging device (22b) to the data storage and computing device (29); - comparing the parameters of the first and second rechargeable batteries (2a, 2b) with threshold values stored in the data storage and computing device (29); - comparing the respective characteristic operating values with threshold values stored in the data storage and computing device (29); - if at least one characteristic operating value exceeds the threshold values stored in the data storage and computing device (29) for a predetermined period of time and a predetermined number, at least one second adjustment parameter is transmitted from the data storage and computing device (29) to the first and / or second rechargeable battery (2a, 2b) via the charging device (22a, 22b) in order to replace a first adjustment parameter stored in the first and / or second rechargeable battery (2a, 2b), respectively; and - charging at least one rechargeable battery (2a, 2b, 2c) with electrical energy by means of the charging device (22a, 22b, 22c) with at least the second adjustment parameter.

2. The method as claimed in claim 1, characterized in that the following method steps: - transmitting at least one first adjustment parameter of the rechargeable battery (2a, 2b, 2c) from the rechargeable battery (2a, 2b, 2c) to the charging device (22a, 22b, 22c) before the start of the charging process.

3. The method as claimed in claim 1 or 2, characterized in that the following method steps: - connecting at least a first rechargeable battery or at least a second rechargeable battery (2a, 2b) to the power tool (1a, 1b); - transmitting at least one characteristic operating value of the first rechargeable battery (2a) recorded by the sensor (30, 31, 32, 33, 34, 35) from the first rechargeable battery (2a) to the first charging device (22a) before the start of the charging process and at least one characteristic operating value of the second rechargeable battery (2b) recorded by the sensor (30, 31, 32, 33, 34, 35) from the second rechargeable battery (2b) to the second charging device (22b) before the start of the charging process; - transmitting the at least one characteristic operating value of the first rechargeable battery (2a) from the first charging device (22a) to a data storage and computing device (29) and the at least one characteristic operating value of the second rechargeable battery (2b) from the second charging device (22b) to the data storage and computing device (29); - comparing the parameters of the first and second rechargeable batteries (2a, 2b) with threshold values stored in the data storage and computing device (29); - comparing the respective characteristic operating values with threshold values stored in the data storage and computing device (29); - if at least one characteristic operating value exceeds the threshold values stored in the data storage and computing device (29) for a predetermined period of time and a predetermined number, at least one second adjustment parameter is transmitted from the data storage and computing device (29) to the first and / or second rechargeable battery (2a, 2b) via the charging device (22a, 22b) in order to replace a first adjustment parameter stored in the first and / or second rechargeable battery (2a, 2b), respectively; and - charging at least one rechargeable battery (2a, 2b, 2c) with electrical energy by means of the charging device (22a, 22b, 22c) with at least the second adjustment parameter. - supplying the power tool (1a, 1b) with electric energy by discharging at least the first or the second rechargeable battery (2a, 2b) using at least the second adjustment parameter.

4. A system (S) for performing the method according to at least one of claims 1 to 3, the system comprising at least a first and a second rechargeable battery (2a, 2b), at least a first and a second charging device (22a, 22b), and at least a first and a second power tool (1a, 1b), wherein, The first and the second rechargeable battery (2a, 2b) each comprise a first transceiver (19) and a first storage unit (18), the first and the second charging device (22a, 22b) each comprise a second transceiver (25) and a second storage unit (26), and the first and the second power tool (1a, 1b) each comprise a third transceiver (11) and a third storage unit (10).

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