BATTERY PACK, SYSTEM AND USE OF A BATTERY PACK

Description

FIELD OF APPLICATION AND STATE OF THE ART

[0001] The invention relates to a battery pack, a system comprising such a battery pack and a use of such a battery pack.

[0002] EP 3 376 558 A1 discloses that in an upper cell unit and a lower cell unit comprising five battery cells, positive electrode terminals are spaced apart and vertically aligned, and negative electrode terminals are spaced apart and vertically aligned. When an electrical device body is rated at 36 V, device-side terminals contact only at the upper terminals, and short-circuiting of the lower terminals is effected using a short-circuit bar. When the electrical device body is rated at 18 V, the upper and lower terminals are simultaneously caused to contact the device-side terminals, and the upper cell unit and the lower cell unit assume a parallel-connected state.Thus, it is possible to automatically switch the output voltage when a battery pack is mounted on the electrical device body side according to the difference in the terminal shape. The preamble of claim 1 is based on EP 3 376 558 A.

[0003] EP 3 113 912 A1 relates to a power tool and battery pack assembly including a battery pack for connection to the power tool to provide power for operating the power tool when connected thereto. The battery pack contains a plurality of power cells, and connecting means (40, 42) are provided to enable the selective supply of power at at least a first or second voltage level to the power tool from the battery pack.

[0004] US 2013 / 002175 A1 discloses that an electric power tool is included in a variety of types of electric power tools. The variety of types of electric power tools includes a variety of battery pack types with different rated output voltages and a variety of tool body types, whose housings are equipped with an attached part to which each of the battery packs is freely removable. The attached part, which the variety of tool body types equipped with motors with different voltage characteristics possess, is configured to be capable of mounting any of the variety of battery pack types with different rated output voltages. This makes it possible to expand the range of available battery packs and increase convenience. TASK AND SOLUTION

[0005] The object of the invention is to provide a battery pack having improved properties, a system comprising such a battery pack and a use of such a battery pack.

[0006] The invention solves the problem by providing a battery pack with the features of claim 1, a system with the features of claim 9 and a use with the features of claim 11. Advantageous developments and / or embodiments of the invention are described in the dependent claims.

[0007] The battery pack according to the invention comprises or has a plurality of battery cells and at least, in particular exactly, three, in particular electrical, pack power contacts or pack power terminals or pack power connections or pack power terminals. A first pair of pack power contacts is designed or configured for, in particular mechanical and / or direct, contact with device power contacts, in particular each of a first electrically driven processing device and / or a first, in particular electrical, charging device. The battery pack is, in particular only orsolely and / or automatically, by contact for, in particular automatically and / or directly, supplying the first processing device with electrical drive power at a first electrical voltage, in particular a first value of the first voltage and / or nominal voltage, of at least some of the plurality of rechargeable battery cells and / or at least one, in particular the same, part of the plurality of rechargeable battery cells with electrical charging power at the first voltage from the first charging device by means of the first pack pair. A second pack pair of pack power contacts, which differs at least, in particular only in parts, from the first, is designed or configured for, in particular mechanically and / or directly, contacting device power contacts, in particular each of a second electrically driven processing device and / or a second, in particular electrical, charging device.The battery pack is designed or configured, in particular only or solely and / or automatically, by contact for supplying the second processing device with electrical drive power with a second electrical voltage that is higher than the first, in particular a second value of the second voltage and / or nominal voltage that is higher than the first, by at least one, in particular the same part of the plurality of battery cells and / or at least one, in particular the same part of the plurality of battery cells with electrical charging power with the second voltage from the second charger by means of the second pack pair.

[0008] This, in particular the definition or determination of the supply with the first voltage, in particular only or solely and / or automatically, by the contact of the first pack pair, and with the second voltage, in particular only or solely and / or automatically, by the contact of the second pack pair, enables a simple and safe structure or a simple and safe design of the battery pack. In particular, the battery pack does not need to or can be designed in any other way to define the supply with, in particular either, the first voltage or the second voltage, e.g., without having a communication device for communication with the first processing device, the first charger, the second processing device and / or the second charger and / or without having a user specification device for a, in particular manual, user specification.Additionally or alternatively, this enables simple and safe use of the battery pack with the first processing device and / or the first charger, in particular with the first voltage, and / or with the second processing device and / or the second charger, in particular with the second voltage, in particular wherein the first processing device, the first charger, the second processing device and / or the second charger can already be present.

[0009] In particular, the battery pack can be used as "Dual System Battery" be referred to.

[0010] The processing device, in particular the first or second, can be a gardening, forestry, construction, and / or soil processing device. Additionally or alternatively, the processing device, in particular the first or second, can be ground-guided and / or hand-guided, in particular hand-carried. In particular, hand-guided, in particular hand-carried, processing device can mean that the processing device, in particular the first or second, has or can have a mass of a maximum of 50 kg (kilograms), in particular a maximum of 20 kg, in particular a maximum of 10 kg.

[0011] The battery pack can be designed for a detachable, in particular electrical and / or mechanical, connection to the first processing device, the first charger, the second processing device, and / or the second charger, in particular without the use of tools and / or without destruction. In particular, the battery pack can be designed to be carried by the first processing device, the first charger, the second processing device, and / or the second charger.

[0012] The contact, in particular the respective contact, can be an electrical and mechanical contact.

[0013] In particular, at a time, either the first pack pair can touch the respective device power contacts of the first processing device or the first charger, or the second pack pair can touch the respective device power contacts of the second processing device or the second charger. Additionally or alternatively, the first pack pair does not need to be configured to touch the device power contacts of the second processing device and / or the second charger, and / or the second pack pair does not need to be configured to touch the device power contacts of the first processing device and / or the first charger.

[0014] The packing power contacts can be connectors.

[0015] The accumulator cells can each be individual, electrochemically rechargeable storage elements for electrical energy. Additionally or alternatively, the accumulator cells can be lithium-ion accumulator cells. Further additionally or alternatively, the accumulator cells can be identical, in particular of the same type and / or construction. Further additionally or alternatively, a, in particular respective, cell voltage, in particular nominal cell voltage, of one, in particular respective, of the accumulator cells can be a minimum of 2 V (volts) and / or a maximum of 4 V, in particular 3.6 V. Further additionally or alternatively, the accumulator cells can be round cells, prismatic cells, or pouch cells.

[0016] The plurality of accumulator cells comprises or has a first number of accumulator cells and / or a second number of accumulator cells. The battery pack comprises or has, in particular, only one, in particular a single and / or electrical, power transmission device.The power transmission device is designed or configured for, in particular automatically and / or directly, the transmission of electrical charging and / or drive power from the first pack pair and / or the first number of accumulator cells to the second number of accumulator cells and / or from the second number of accumulator cells to the first pack pair and / or the first number of accumulator cells, in particular for setting a first charge state, in particular a first value of the first charge state, of the first number of accumulator cells and / or a second charge state, in particular a second value of the second charge state, of the second number of accumulator cells, in particular for aligning the first charge state and the second charge state to one another.This allows the first charger to supply charging power not only to the first number of battery cells, but also to the second number of battery cells. Additionally or alternatively, this allows the first processing device to be supplied with drive power not only from the first number of battery cells, but also from the second number of battery cells. Furthermore, additionally or alternatively, and in particular, this enables a... "Cell balancing" the battery cells.

[0017] The power transmission device comprises or has at least, in particular exactly, three, in particular electrical, inputs and / or outputs. A first transmission pair of the inputs and / or outputs and the first number of accumulator cells and / or the first pack pair are, in particular, electrically interconnected or connected in parallel with one another and / or in a fixed or permanent manner and / or directly. Additionally or alternatively, a second transmission pair of the inputs and / or outputs, which is at least, in particular only partially, different from the first, and the second number of accumulator cells are, in particular, electrically interconnected or connected in parallel with one another and / or in a fixed or permanent manner and / or directly.Furthermore, additionally or alternatively, a third transmission pair of inputs and / or outputs, which is at least, in particular only, different in part from the first and / or the second, and the first number of accumulator cells and the second number of accumulator cells are, in particular, electrically connected in series or in series with one another or jointly or together and / or fixedly or permanently and / or directly, and / or the second pack pair is, in particular, electrically connected in parallel or in parallel with one another and / or fixedly or permanently and / or directly. This enables the transmission of the charging and / or drive power. In particular, an input and / or output of the first transmission pair can be, in particular directly, electrically connected to an end cell contact of the first number of accumulator cells and / or a pack power contact of the first pack pair.at a, in particular the same, potential, and another input and / or output of the first transmission pair can be, in particular directly, electrically connected to another end cell contact of the first number of battery cells and / or another pack power contact of the first pack pair or can be at a, in particular the same, potential. Additionally or alternatively, an input and / or output of the second transmission pair can be, in particular directly, electrically connected to an end cell contact of the second number of battery cells or can be at a, in particular the same, potential, and another input and / or output of the second transmission pair can be, in particular directly, electrically connected to another end cell contact of the second number of battery cells or can be at a, in particular the same, potential.Furthermore, additionally or alternatively, an input and / or output of the third transmission pair can be electrically connected, in particular directly, to an end cell contact of the first number of accumulator cells and the second number of accumulator cells and / or a pack power contact of the second pack pair or can be at a potential, in particular the same, and another input and / or output of the third transmission pair can be electrically connected, in particular directly, to another end cell contact of the first number of accumulator cells and the second number of accumulator cells and / or another pack power contact of the second pack pair or can be at a potential, in particular the same.

[0018] In a further development of the invention, the battery pack is designed to be supplied with only the first voltage by means of the first pack pair. The battery pack is designed to be supplied with only the second voltage by means of the second pack pair. In particular, the battery pack need not be designed to be supplied with a voltage different from the first, in particular the second, voltage by means of the first pack pair. Additionally or alternatively, the battery pack need not be designed to be supplied with a voltage different from the second, in particular the first, voltage by means of the second pack pair.

[0019] In a further development of the invention, the plurality of accumulator cells comprises or has the first number of accumulator cells and the second number of accumulator cells. The battery pack is designed to supply the first voltage with a first total voltage, in particular a first value of the first total voltage, in particular equal to the first total voltage, only or solely to the first number of accumulator cells. The battery pack is designed to supply the second voltage with a second total voltage, in particular a second value of the second total voltage, in particular equal to the second total voltage, to the first number of accumulator cells and the second number of accumulator cells, in particular to one another or jointly or together and / or fixedly or permanently and / or directly, electrically connected in series or in series.This allows the second voltage to be higher than the first voltage.

[0020] In a further development of the invention, the plurality of accumulator cells comprises or has the first number of accumulator cells and the second number of accumulator cells. The first number of accumulator cells and the first pack pair are, in particular, electrically interconnected or connected in parallel with one another and / or in a fixed or permanent manner and / or directly. The first number of accumulator cells and the second number of accumulator cells are, in particular, electrically interconnected or connected in series with one another or jointly and / or in a fixed or permanent manner and / or directly, and the second pack pair are, in particular, electrically interconnected or connected in parallel with one another and / or in a fixed or permanent manner and / or directly.This enables the battery pack to be configured to be supplied with the first voltage through the contact of the first pack pair, and the battery pack to be configured to be supplied with the second voltage through the contact of the second pack pair. In other words, this enables the definition of the supply with the first voltage through the contact of the first pack pair and with the second voltage through the contact of the second pack pair. In particular, a pack power contact of the first pack pair can be electrically connected, in particular directly, to an end cell contact of the first number of battery cells or can be at a potential, in particular the same, and another pack power contact of the first pack pair can be electrically connected, in particular directly, to another end cell contact of the first number of battery cells or can be at a potential, in particular the same.Additionally or alternatively, a pack power contact of the second pack pair can be electrically connected, in particular directly, to an end cell contact of the first number of accumulator cells and the second number of accumulator cells or can be at a potential, in particular the same, and another pack power contact of the second pack pair can be electrically connected, in particular directly, to another end cell contact of the first number of accumulator cells and the second number of accumulator cells or can be at a potential, in particular the same.

[0021] In one embodiment of the invention, the power transmission device comprises or has, in particular, only one, in particular a single, DC / DC converter or DC / DC converter or DC / DC chopper. In particular, the DC / DC converter is a DC / DC converter. In particular, the DC / DC converter can be bidirectional.

[0022] In one embodiment of the invention, the power transmission device is adjustable, in particular electrically, and in particular controllable and / or regulatable. The battery pack comprises or has a, in particular electrical, adjustment device, in particular a control and / or regulating device. The adjustment device is designed or configured to adjust, in particular automatically and / or electrically, the power transmission device in such a way that the first charge state and / or the second charge state are / will be adjusted, in particular adjusted. In particular, the adjustment device can be designed for adjustment based on operating data or usage data, in particular from a previous operation or a previous use of the battery pack.Additionally or alternatively, the setting device can be designed for, in particular wirelessly, receiving setting information, in particular based on, in particular, the operating data or usage data, in particular the previous operation or previous use of the battery pack, from an external, in particular mobile, device, in particular a smartphone, for setting purposes. In particular, the combination of features, in particular of this paragraph, can be or represent a self-contained or independent invention, independent of or detached from the features of claim 1, in particular that the battery pack is designed to be supplied with the first voltage by the contact of the first pack pair, and that the battery pack is designed to be supplied with the second voltage by the contact of the second pack pair.

[0023] In a further development of the invention, the first voltage is a, in particular first, nominal voltage of at least 10 V, in particular at least 30 V, and / or at most 43 V. Additionally or alternatively, the second voltage is a, in particular second, nominal voltage of at least 18 V, in particular at least 43 V, and / or at most 72 V, in particular at most 54 V.

[0024] Additionally or alternatively, the second voltage may be at least 10% (percent), in particular at least 20%, in particular at least 30%, higher than the first voltage.

[0025] Furthermore, additionally or alternatively, the battery pack, in particular the plurality of battery cells, can have a maximum electrical drive and / or charging power of at least 10 watts (W), in particular at least 100 W, in particular at least 1 kilowatt (kW), in particular at least 2 kW, and / or at most 10 kW, in particular at most 5 kW, in particular 3 kW.

[0026] Furthermore, additionally or alternatively, the battery pack, in particular the plurality of battery cells, can have a maximum energy content, in particular electrical, of at least 100 watt hours (Wh), in particular at least 200 Wh, and / or at most 4000 Wh, in particular at most 2000 Wh, in particular at most 1000 Wh, in particular at most 500 Wh, in particular 337 Wh.

[0027] In a further development, in particular an embodiment, of the invention, the battery pack comprises or has, in particular only, one, in particular single and / or common, pack housing, in particular a battery pack housing. The plurality of battery cells is, in particular, and the power transmission device and / or the adjustment device, if present, are arranged in the pack housing. In particular, the pack power contacts are arranged on the pack housing, in particular an edge of the pack housing. This enables the plurality of battery cells to be held together and / or protected, in particular the plurality of battery cells, from external influences. In particular, the pack housing can be solid.

[0028] The system according to the invention comprises or has a battery pack, in particular the battery pack as mentioned above, and the first processing device and / or the first charger and / or the second processing device and / or the second charger. In particular, the processing device, in particular the first or second, or the charging device, in particular the first or second, can have a battery receptacle, in particular a battery compartment, wherein the battery receptacle can be designed to accommodate the battery pack.

[0029] In a further development of the invention, the first processing device and / or the second processing device is / are a saw, in particular a chainsaw, a pole pruner, a brush cutter, a hedge trimmer, a hedge cutter, a blower, a leaf blower, a branch cutter, a cut-off machine, a sweeper, a roller brush, a sweeping brush, a lawn mower, a scarifier, a grass shears or a high-pressure cleaner.

[0030] The use according to the invention is a use of a battery pack, in particular the battery pack as mentioned above, in particular of a system, in particular the system as mentioned above, with the first processing device and / or the first charger with the first voltage and / or with the second processing device and / or the second charger with the second voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Further advantages and aspects of the invention emerge from the claims and from the description of exemplary embodiments of the invention, which are explained below with reference to the figures. In the figures: Fig. 1 shows a schematic view, in particular a circuit diagram, of a system according to the invention comprising a battery pack according to the invention, a first processing device, a first charger, a second processing device and a second charger, Fig. 2 shows an inventive use of the battery pack with the first processing device of the Fig. 1 with a first voltage, and Fig. 3 the inventive use of the battery pack with the second processing device of the Fig. 1 with a second voltage. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Fig. 1 bis 3 show a system 100 according to the invention. The system 100 has a battery pack 1 according to the invention and a first electrically driven processing device 52 and / or a first charger 53 and / or a second electrically driven processing device 57 and / or a second charger 58.

[0033] The battery pack 1 has a plurality of battery cells 2 and at least three pack power contacts 3a, 3b, 3c. A first pack pair 3ab of the pack power contacts 3a, 3b is designed, in particular, to contact device power contacts 51a, 51b of the first electrically driven processing device 52 and / or the first charging device 53. The battery pack 1 is designed, in particular, to contact the device power contacts 51a, 51b of the first electrically driven processing device 52 and / or the first charging device 53 by means of the first pack pair 3ab, to supply the first processing device 52 with electrical drive power AL having a first electrical voltage U1 from at least a portion of the plurality of battery cells 2 and / or at least one—in the illustrated embodiment, the same portion of the plurality of battery cells 2—with electrical charging power LL having the first voltage U1 from the first charging device 53.A second pack pair 3ac of pack power contacts 3a, 3c, which differs at least in part from the first, in the exemplary embodiment shown only in part, is designed, in particular, to contact device power contacts 56a, 56b of the second electrically driven processing device 57 and / or the second charging device 58. The battery pack 1 is designed, in particular, to be in contact with the device power contacts 56a, 56b of the second electrically driven processing device 57 and / or the second charging device 58 by means of the second pack pair 3ac, by means of the contact, to supply the second processing device 57 with electrical drive power AL with a second electrical voltage U2, which is higher than the first, from at least one, in the exemplary embodiment shown the same part, of the plurality of battery cells 2 and / or at least one, in particular the same part, of the plurality of battery cells 2 with electrical charging power LL with the second voltage U2 from the second charging device 58.

[0034] In the illustrated embodiment, the battery pack 1 has exactly three pack power contacts 3a, 3b, 3c. In alternative embodiments, the battery pack can have at least four pack power contacts. Additionally or alternatively, in alternative embodiments, a third pack pair of pack power contacts, which differs at least in part from the first and / or the second, in particular only in part, can be designed, in particular contacted, for contacting device power contacts, in particular each of a third electrically driven processing device and / or a third, in particular electrical, charging device.The battery pack can be designed, in particular only and / or automatically, by contact to supply the third processing device with electrical drive power with, in particular only, a third electrical voltage, in particular different from the first and / or the second, in particular a third value of the third voltage and / or nominal voltage, from at least one, in particular the same part of the plurality of battery cells and / or at least one, in particular the same part of the plurality of battery cells with electrical charging power with, in particular only, the third voltage from the third charger by means of the third pack pair, in particular supplied.

[0035] Fig. 2 shows an inventive use of the battery pack 1 with the first processing device 52 with the first voltage U1.

[0036] Fig. 3shows an inventive use of the battery pack 1 with the second processing device 57 with the second voltage U2.

[0037] In the illustrated embodiment, the first processing device 52 is a brush cutter 52', and the second processing device 57 is a saw 57'. In alternative embodiments, the first processing device and / or the second processing device can be a saw, a pole pruner, a brush cutter, a hedge trimmer, a hedge trimmer, a blower, a leaf blower, a lopper, a power cutter, a power grinder, a sweeper, a roller brush, a sweeping brush, a lawn mower, a scarifier, a grass shear, or a high-pressure cleaner.

[0038] In particular, at one point in time, the first pack pair 3ab touches the device power contacts 51a, 51b of the first processing device 52. Through the contact, the battery pack 1 supplies the first processing device 52 with drive power AL with the first voltage U1 from at least the part of the plurality of battery cells 2 by means of the first pack pair 3ab.

[0039] Alternatively or at another time, the first pack pair 3ab touches the device power contacts 51a, 51b of the first charger 53. By means of the contact, the battery pack 1 supplies at least the part of the plurality of battery cells 2 with charging power LL with the first voltage U1 from the first charger 53 by means of the first pack pair 3ab.

[0040] Further alternatively or at a further different time, the second pack pair 3ac touches the device power contacts 56a, 56b of the second processing device 57. By means of the contact, the battery pack 1 supplies the second processing device 57 with drive power AL with the second voltage U2 from at least part of the plurality of battery cells 2 by means of the second pack pair 3ac.

[0041] Alternatively or at yet another different point in time, the second pack pair 3ac touches the device power contacts 56a, 56b of the second charger 58. By contacting, the battery pack 1 supplies at least the portion of the plurality of battery cells 2 with charging power LL with the second voltage U2 from the second charger 58 by means of the second pack pair 3ac.

[0042] In detail, the battery pack 1 is designed, in particular, to be supplied with only the first voltage U1 by means of the first pack pair 3ab. The battery pack 1 is designed, in particular, to be supplied with only the second voltage U2 by means of the second pack pair 3ac.

[0043] Furthermore, the plurality of accumulator cells 2 comprises a first number of accumulator cells 2a and / or a second number of accumulator cells 2b.

[0044] In the illustrated embodiment, the first number of accumulator cells 2a comprises ten accumulator cells. In alternative embodiments, the first number of accumulator cells may comprise only a single accumulator cell or at least two accumulator cells.

[0045] Furthermore, in the illustrated embodiment, the second number of accumulator cells 2b comprises four accumulator cells. In alternative embodiments, the second number of accumulator cells may comprise only a single accumulator cell or at least two accumulator cells.

[0046] In addition, the battery pack 1 is designed, in particular, to supply the first voltage U1 defined by a first total voltage Ua, in the illustrated embodiment equal to the first total voltage Ua, only to the first number of battery cells 2a. The battery pack 1 is designed, in particular, to supply the second voltage U2 defined by a second total voltage Ua+Ub, in the illustrated embodiment equal to the second total voltage Ua+Ub, the first number of battery cells 2a and the second number of battery cells 2b, in the illustrated embodiment permanently connected electrically in series.

[0047] In alternative embodiments, the battery pack can be designed, in particular supplied, to supply the third voltage defined by a third total voltage, in particular equal to the third total voltage, only to the second number of battery cells.

[0048] Furthermore, the first number of accumulator cells 2a and the first pack pair 3ab are, in the illustrated embodiment, permanently connected electrically in parallel. The first number of accumulator cells 2a and the second number of accumulator cells 2b are, in the illustrated embodiment, permanently connected electrically in series, and the second pack pair 3ac is, in the illustrated embodiment, permanently connected electrically in parallel.

[0049] In the exemplary embodiment shown, the battery pack 1 has a first pack power contact 3a, a second pack power contact 3b, and a third pack power contact 3c. The first number of battery cells 2a has a first cell contact 2aa and a second cell contact 2ab. The second number of battery cells 2b has a first cell contact 2ba and a second cell contact 2bb. The first pack power contact 3a is electrically connected, in particular directly, to the first cell contact 2aa of the first number of battery cells 2a or is at a potential, in particular the same. The second pack power contact 3b is electrically connected, in particular directly, to the second cell contact 2ab of the first number of battery cells 2a and the first cell contact 2ba of the second number of battery cells 2b or is at a potential, in particular the same.The third pack power contact 3c is electrically connected to the second cell contact 2bb of the second number of accumulator cells 2b, in particular directly, or at a potential, in particular the same potential.

[0050] The battery pack 1 further comprises a power transmission device 4. The power transmission device 4 is designed, in particular transmits, electrical charging and / or drive power LL, AL from the first pack pair 3ab and / or the first number of battery cells 2a to the second number of battery cells 2b and / or from the second number of battery cells 2b to the first pack pair 3ab and / or the first number of battery cells 2a, in particular for setting a first charge state LZa of the first number of battery cells 2a and / or a second charge state LZb of the second number of battery cells 2b.

[0051] In detail, the power transmission device 4 has a DC-DC converter 4', in particular the DC-DC converter 4'.

[0052] In addition, the power transmission device 4 has at least three inputs and / or outputs 4a, 4b, 4c. A first transmission pair 4ab of the inputs and / or outputs 4a, 4b and the first number of accumulator cells 2a and / or the first pack pair 3ab are, in the illustrated embodiment, permanently connected electrically in parallel. Additionally or alternatively, a second transmission pair 4bc of the inputs and / or outputs 4b, 4c, which differs at least in part from the first, and in the illustrated embodiment only in part, and the second number of accumulator cells 2b, are, in the illustrated embodiment, permanently connected electrically in parallel.Furthermore, additionally or alternatively, a third transmission pair 4ac of the inputs and / or outputs 4a, 4c, which is at least partially different from the first and / or the second, in the embodiment shown only in each case, and the first number of accumulator cells 2a and the second number of accumulator cells 2b, are permanently connected electrically in series in the embodiment shown and / or the second pack pair 3ac is permanently connected electrically in parallel in the embodiment shown.

[0053] In the illustrated embodiment, the power transmission device 4 has exactly three inputs and / or outputs 4a, 4b, 4c. In alternative embodiments, the power transmission device can have at least four inputs and / or outputs.

[0054] Furthermore, in the exemplary embodiment shown, the power transmission device 4 has a first input and / or output 4a, a second input and / or output 4b, and a third input and / or output 4c. The first input and / or output 4a is electrically connected, in particular directly, to the first cell contact 2aa of the first number of battery cells 2a and / or the first pack power contact 3a, or at a potential, in particular the same. The second input and / or output 4b is electrically connected, in particular directly, to the second cell contact 2ab of the first number of battery cells 2a and the first cell contact 2ba of the second number of battery cells 2b and / or the second pack power contact 3b, or at a potential, in particular the same.The third input and / or output 4c is electrically connected, in particular directly, to the second cell contact 2bb of the second number of accumulator cells 2b and / or the third pack power contact 3c or is at a potential, in particular the same potential.

[0055] Furthermore, the power transmission device 4 is adjustable. The battery pack 4 has an adjustment device 5. The adjustment device 5 is designed to adjust the power transmission device 4 in such a way, in particular, that the first charge level LZa and / or the second charge level LZb are / is adjusted.

[0056] Furthermore, the first voltage U1 is a nominal voltage of at least 10 V, in particular at least 30 V, and / or at most 43 V, in the embodiment shown 36 V. Additionally or alternatively, the second voltage U2 is a nominal voltage of at least 18 V, in particular at least 43 V, and / or at most 72 V, in particular at most 54 V, in the embodiment shown 50.4 V.

[0057] In addition, the battery pack 1 has a pack housing 6. The plurality of battery cells 2, in particular the power transmission device 4 and / or the adjustment device 5, are arranged in the pack housing 6. In the illustrated embodiment, the pack power contacts 3a, 3b, 3c are arranged on the pack housing 6.

[0058] Furthermore, the processing device 52, 57, in particular the first or second, or the charging device 53, 58, in particular the first or second, has a battery receptacle 60, in particular a battery compartment 60'. The battery receptacle 60 is designed to accommodate the battery pack 1, in particular the battery pack 1 is accommodated.

[0059] As the embodiments shown and explained above make clear, the invention provides an advantageous battery pack, the battery pack having improved properties, an advantageous system comprising such a battery pack and an advantageous use of such a battery pack.

Claims

1. Battery pack (1), wherein the battery pack (1) has: - a plurality of battery cells (2), and - at least three pack power contacts (3a, 3b, 3c), - wherein a first pack pair (3ab) of the pack power contacts (3a, 3b) is designed for making contact with device power contacts (51a, 51b) of a first electrically driven work device (52) and / or a first charging device (53), wherein the battery pack (1) is designed for supplying, due to contact being made, the first work device (52) with electrical drive power (AL) with a first electrical voltage (U1) from at least a portion of the plurality of battery cells (2) and / or supplying, due to contact being made, at least a same portion of the plurality of battery cells (2) with electrical charging power (LL) with the first voltage (U1) from the first charging device (53) by means of the first pack pair (3ab), and - wherein a second pack pair (3ac) of the pack power contacts (3a, 3c), which second pack pair is different from the first at least in portions, is designed for making contact with device power contacts (56a, 56b) of a second electrically driven work device (57) and / or a second charging device (58), wherein the battery pack (1) is designed for supplying, due to contact being made, the second work device (57) with electrical drive power (AL) with a second electrical voltage (U2), which is higher than the first, from at least a same portion of the plurality of battery cells (2) and / or supplying, due to contact being made, at least a same portion of the plurality of battery cells (2) with electrical charging power (LL) with the second voltage (U2) from the second charging device (58) by means of the second pack pair (3ac), - wherein the plurality of battery cells (2) has a first number of battery cells (2a) and / or a second number of battery cells (2b), - characterized in that the battery pack (1) has a power transmission device (4), - wherein the power transmission device (4) is designed for transmitting electrical charging and / or drive power (LL, AL) from the first pack pair (3ab) and / or the first number of battery cells (2a) to the second number of battery cells (2b) and / or from the second number of battery cells (2b) to the first pack pair (3ab) and / or the first number of battery cells (2a), in particular for adjusting a first state of charge (LZa) of the first number of battery cells (2a) and / or a second state of charge (LZb) of the second number of battery cells (2b), - wherein the power transmission device (4) has at least three inputs and / or outputs (4a, 4b, 4c), - wherein a first transmission pair (4ab) of the inputs and / or outputs (4a, 4b) and the first number of battery cells (2a) and / or the first pack pair (3ab) are interconnected, in particular permanently, electrically in parallel, and / or - wherein a second transmission pair (4bc) of the inputs and / or outputs (4b, 4c), which second transmission pair is different from the first at least in portions, and the second number of battery cells (2b) are interconnected, in particular permanently, electrically in parallel, and / or - wherein a third transmission pair (4ac) of the inputs and / or outputs (4a, 4c), which third transmission pair is different from the first and / or the second at least in portions, and the first number of battery cells (2a) and the second number of battery cells (2b) are interconnected, in particular permanently, electrically in series and / or the second pack pair (3ac) are interconnected, in particular permanently, electrically in parallel.

2. Battery pack (1) according to Claim 1, - wherein the battery pack (1) is designed for supplying with only the first voltage (U1) by means of the first pack pair (3ab), and - wherein the battery pack (1) is designed for supplying with only the second voltage (U2) by means of the second pack pair (3ac).

3. Battery pack (1) according to either of the preceding claims, - wherein the plurality of battery cells (2) has the first number of battery cells (2a) and the second number of battery cells (2b), - wherein the battery pack (1) is designed for supplying with the first voltage (U1) defined by a first total voltage (Ua), in particular equal to the first total voltage (Ua), only of the first number of battery cells (2a), and - wherein the battery pack (1) is designed for supplying with the second voltage (U2) defined by a second total voltage (Ua+Ub), in particular equal to the second total voltage (Ua+Ub), of the first number of battery cells (2a) and the second number of battery cells (2b), interconnected, in particular permanently, electrically in series.

4. Battery pack (1) according to one of the preceding claims, - wherein the plurality of battery cells (2) has the first number of battery cells (2a) and the second number of battery cells (2b), - wherein the first number of battery cells (2a) and the first pack pair (3ab) are interconnected, in particular permanently, electrically in parallel, and - wherein the first number of battery cells (2a) and the second number of battery cells (2b) are interconnected, in particular permanently, electrically in series and the second pack pair (3ac) are interconnected, in particular permanently, electrically in parallel.

5. Battery pack (1) according to one of the preceding claims, - wherein the power transmission device (4) has a DC-to-DC converter (4'), in particular is the DC-to-DC converter (4').

6. Battery pack (1) according to one of the preceding claims, - wherein the power transmission device (4) is adjustable, and - wherein the battery pack (1) has an adjustment device (5), wherein the adjustment device (5) is designed to adjust the power transmission device (4) in such a way that the first state of charge (LZa) and / or the second state of charge (LZb) are / is adjusted.

7. Battery pack (1) according to one of the preceding claims, - wherein the first voltage (U1) is a rated voltage of at least 10 V, in particular at least 30 V, and / or at most 43 V, and / or - wherein the second voltage (U2) is a rated voltage of at least 18 V, in particular at least 43 V, and / or at most 72 V, in particular at most 54 V.

8. Battery pack (1) according to one of the preceding claims, in particular Claim 6, - wherein the battery pack (1) has a pack housing (6), wherein the plurality of battery cells (2), in particular and the power transmission device (4) and / or the adjustment device (5), is, in particular are, arranged in the pack housing (6), in particular and wherein the pack power contacts (3a, 3b, 3c) are arranged on the pack housing (6).

9. System (100), wherein the system (100) has - a battery pack (1) according to one of the preceding claims, and - the first work device (52) and / or the first charging device (53) and / or the second work device (57) and / or the second charging device (58).

10. System (1) according to Claim 9, - wherein the first work device (52) and / or the second work device (57) are / is a saw (57'), a pole pruner, a brush cutter (52'), a set of hedge shears, a hedge cutter, a blower device, a leaf blower, a lopper, a separation grinder, a sweeping device, a sweeping roller, a sweeping brush, a lawnmower, a scarifier, a set of grass shears or a high-pressure cleaner.

11. Use of a battery pack (1) according to one of Claims 1 to 8, in particular of a system according to Claim 9 or 10, with the first work device (52) and / or the first charging device (53) with the first voltage (U1) and / or with the second work device (57) and / or the second charging device (58) with the second voltage (U2).