Battery pack, processing system and method for manufacturing a battery pack

Description

SCOPE OF APPLICATION AND STATE OF THE ART

[0001] The invention relates to a battery pack for supplying an electrically driven machining device with electrical drive power, to a machining system comprising such a battery pack and an electrically driven machining device, and to a method for manufacturing a battery pack for supplying an electrically driven machining device with electrical drive power.

[0002] EP 1 727 223 A1 discloses a battery pack in which a plurality of rechargeable batteries are held in a parallel, spaced-apart relationship by a central frame, a bottom frame, and a terminal frame. The plurality of rechargeable batteries are connected in series and integrated with a circuit substrate by mounting the circuit substrate on the terminal frame. The circuit substrate is provided with a resin mold, which ensures that the battery pack remains free from damage to electrical circuit components even in the event of water or dust ingress through openings provided to suppress temperature rises in the rechargeable batteries.The majority of rechargeable batteries are connected in series by connecting link plates to the positive and negative electrode terminals. These terminals are formed on sealing plates of the majority of the rechargeable batteries, which are held by the terminal-side frame. Connecting projections formed on each link plate fit into corresponding connecting holes in the circuit substrate to integrate the circuit substrate with the rechargeable batteries, thus simplifying wiring to connect each of the rechargeable batteries to the circuit substrate.

[0003] JP 2006 156171 A discloses a battery pack that houses secondary batteries in a casing. The battery pack has a pair of partitions within the casing that allow both ends of the secondary batteries to pass through in a watertight manner, dividing the interior of the casing into a cooling chamber between and within the partition pair and enclosed chambers outside the partitions. The casing separates the cooling chamber and the enclosed chambers by means of the partitions in the watertight structure, with the secondary batteries positioned at both ends in the enclosed chambers and in the middle in the cooling chamber. The cooling chamber opens out of the casing and ventilates the casing to cool the center of the secondary batteries with air. The battery pack holds the ends of the secondary batteries in the casing by separating the enclosed chambers, in which the ends of the secondary batteries are positioned, from the cooling chamber by means of the partitions in the watertight structure.

[0004] German patent DE 10 2009 040 128 A1 discloses an assembly comprising a plurality of elongated battery cells. Each battery cell has a top, a long side, and a bottom. One of the positive and negative terminals of the battery cell is located on the top, and the other positive and negative terminals are located on the bottom. Each battery cell also has an opening on its top for venting in the event of a fault. A first conductor is provided for electrically connecting the top terminal of at least one of the battery cells. An elastic first mat with a top and a bottom is also part of the assembly. The first mat has holes extending from the top to the bottom. The tops of the battery cells are positioned on the top of the first mat.A potting compound fills the holes in the first mat and at least partially covers the long side of the battery cells.

[0005] DE 10 2013 211 459 A1 discloses a power tool battery pack with a plurality of battery cells, each having a positive cell terminal at one end and a negative cell terminal at the opposite end, connecting conductors for electrically connecting the battery cells, a connection side, and a bottom side opposite the connection side. Each battery cell has at least one integrated cell connector designed to make one of the cell terminals electrically contactable at the other end of the battery cell. The connecting conductors for electrically connecting the battery cells are arranged exclusively on the connection side. An electronic module is arranged on the connection side. The battery cells are at least partially embedded in a potting compound. TASK AND SOLUTION

[0006] The invention aims to provide a battery pack for supplying an electrically driven processing device with electrical drive power, a

[0007] a machining system comprising such a battery pack and an electrically driven machining device and a method for manufacturing a battery pack for supplying an electrically driven machining device with electrical drive power, wherein the battery pack and the method each have improved properties.

[0008] The invention solves the problem by providing a battery pack with the features of claim 1, a processing system with the features of claim 13, and a method with the features of claim 14. Advantageous further developments and / or embodiments of the invention are described in the dependent claims.

[0009] The battery pack according to the invention is designed and configured for supplying, in particular automatically, an electrically driven processing device, especially garden, forestry, and / or construction equipment, with electrical drive power. The battery pack comprises several battery cells, at least one circuit board, and a battery pack housing. The battery cells have cell contacts. The at least one circuit board is electrically connected to the cell contacts. The battery pack housing comprises a first battery pack housing part and a second battery pack housing part. The first battery pack housing part and the second battery pack housing part are sealed together. In particular, all battery cells are arranged, in particular completely, within the battery pack housing, especially within the first battery pack housing part and the second battery pack housing part.

[0010] In addition, all cell contacts and at least one circuit board are arranged, in particular completely, within the second battery pack housing part. The second battery pack housing part is designed or configured as a mold for a potting compound. In particular, all cell contacts and at least one circuit board are, in particular completely, enclosed by the potting compound, in particular within the second battery pack housing part.

[0011] Additionally or alternatively, at least one printed circuit board is arranged, in particular completely, within the battery pack housing. One battery pack housing part, in particular the second battery pack housing part, has at least one thread. The other battery pack housing part, in particular the first battery pack housing part, has at least one end contact surface. The end contact surface is located at an end of the other battery pack housing part adjacent to or near the first battery pack housing part. The battery pack has at least one screw. The screw is screwed into the thread for the mechanical connection of one battery pack housing part and the other battery pack housing part, and its screw head rests against the end contact surface.

[0012] The battery pack housing enables, in particular the first battery pack housing part and the second battery pack housing part, protection of the battery cells and the at least one circuit board, especially against mechanical stress and / or contact.

[0013] Designing the second battery pack housing part as a mold thus enables a dual function or a synergistic effect. At the same time, this allows the cell contacts and the at least one circuit board to be encapsulated by the potting compound after being arranged within the second battery pack housing part, resulting in relatively simple battery pack manufacturing. In particular, the potting compound can protect the battery cells and the at least one circuit board from moisture and / or mechanical stress and / or contact and / or provide electrical insulation and / or heat dissipation, especially for the cell contacts and / or the at least one circuit board.

[0014] The arrangement of the head mounting surface at the adjacent end of the other battery pack housing part allows relatively little installation length to be provided for the screw in the other battery pack housing part, and thus it can be used for other purposes for the other battery pack housing part and / or the one battery pack housing part.

[0015] In particular, the battery cells can be designed to supply the processing device with drive power. Additionally or alternatively, the battery cells can each be individual rechargeable storage elements for electrical energy on an electrochemical basis. In particular, the battery cells can be lithium-ion batteries. Furthermore, additionally or alternatively, the battery cells can be electrically interconnected, in particular in parallel or series. In particular, the cell contacts, especially those of adjacent battery cells, can be electrically connected to each other. Furthermore, additionally or alternatively, the battery cells can be identical, in particular of the same type and / or construction. Furthermore, additionally or alternatively, the cell contacts can be referred to as terminals, poles, or connecting electrodes.Additionally or alternatively, the cell contacts can be live, in particular having live surfaces.

[0016] The at least one circuit board can be live, in particular have live surfaces.

[0017] Prior to arranging and / or encapsulating the battery pack housing, the first and second battery pack housing parts may be separated from each other by the potting compound for arranging the battery cells and the at least one circuit board within the battery pack housing and / or for encapsulating the cell contacts and the at least one circuit board. They do not necessarily need to be sealed together. Additionally or alternatively, an opening in the first battery pack housing part may face the second battery pack housing part, and / or an opening in the second battery pack housing part may face the first battery pack housing part. Furthermore, additionally or alternatively, the first and second battery pack housing parts may be connected or in contact with each other in a connection direction, particularly longitudinally. Furthermore, additionally or alternatively, the battery pack housing may be an outer casing or the outermost casing of the battery pack.be accessible from the outside.

[0018] The potting compound can be electrically insulating and / or thermally conductive. Additionally or alternatively, the potting compound can be a casting resin, particularly a synthetic resin. Furthermore, additionally or alternatively, the potting compound can be in a solid state.

[0019] The thread and / or screw may run in the direction of connection. Additionally or alternatively, the thread and / or screw may be accessible from outside the battery pack housing.

[0020] "Arranged at the adjacent end of the other battery pack housing part" can mean that the head mounting surface can be spaced a maximum of 20 millimeters (mm), in particular a maximum of 10 mm, in particular a maximum of 5 mm, away from the adjacent end of the other battery pack housing part.

[0021] In a further development of the invention, the first battery pack housing part is a housing container and the second battery pack housing part is a housing lid. This allows relatively little potting compound to be used for enclosing the cell contacts and the at least one circuit board, and in particular for completely filling the second battery pack housing part. In particular, the housing lid can be shorter than the housing container in the connection direction. Additionally or alternatively, the battery cells can have cell shells, which can be arranged, in particular completely, within the housing container.

[0022] In a further development of the invention, the accumulator cells have cell or outer shells. The potting compound extends at least to, and in particular to, all of, the cell shells.

[0023] Additionally or alternatively, the potting compound extends, in particular precisely, to an end of the second battery pack housing part adjacent to or near the first battery pack housing part.

[0024] Additionally or alternatively, the potting compound extends at least to an end of the first battery pack housing part that is adjacent to or near the second battery pack housing part.

[0025] Reaching as far as the cell walls allows the cell contacts to be completely enclosed by the potting compound.

[0026] Extending to the adjacent end of the second battery pack housing part and / or to the adjacent end of the first battery pack housing part enables potting or sealing and / or sealing of the battery pack housing, in particular a separation or interface between the first battery pack housing part and the second battery pack housing part, and / or an additional mechanical connection between the first battery pack housing part and the second battery pack housing part.

[0027] In particular, the cell contacts and the cell shells can be electrically insulated from each other, especially so that the cell shells cannot carry voltage. Additionally or alternatively, the cell shells can be partially not enclosed by the potting compound, especially so that gas can escape from the cell shells.

[0028] The potting compound does not need to, and cannot, extend further, particularly in the direction of connection, than the adjacent end of the second battery pack housing part. Additionally or alternatively, the first and second battery pack housing parts can overlap or overlap in the direction of connection, with the second battery pack housing part overlapping the first battery pack housing part on the outside.

[0029] In a further development of the invention, in particular all the cell contacts and the at least one circuit board are enclosed by the potting compound, in particular only, in a single, common potting block. This allows the cell contacts and the at least one circuit board to be enclosed by the potting compound in a single, in particular only, common potting step after they have been arranged within the second battery pack housing part. Additionally or alternatively, this enables particularly good electrical insulation of the cell contacts and the at least one circuit board.

[0030] In a further development of the invention, the accumulator cells are designed and configured, and arranged in a cell block, particularly a stack, such that the cell contacts are arranged, particularly only, on one, particularly a single, common contact side of the cell block. This enables a particularly simple construction of the battery pack and thus a particularly simple manufacturing process. In particular, the cell block can be arranged within the second battery pack housing part with the contact side facing forward, particularly opposite to the connection direction. Additionally or alternatively, the cell block can be enclosed by the potting compound with the contact side facing forward. Furthermore, additionally or alternatively, the contact side can be designated as the potting side. Furthermore, additionally or alternatively, the cell block can be cuboidal, and in particular, the contact side can be a cuboidal face.

[0031] In one embodiment of the invention, the at least one printed circuit board (PCB) is arranged, in particular only, on the contact side, especially on the cell block, particularly with one plate plane parallel to the contact side. This enables a relatively compact design of the battery pack. At the same time, this allows the PCB to be located particularly close to the cell contacts. "On the cell block" can mean, in particular, that the PCB can be arranged at a maximum distance of 20 mm, in particular a maximum of 10 mm, and in particular a maximum of 5 mm, from the cell block.

[0032] In a further development of the invention, in particular all the accumulator cells are pouch cells and, in particular, all the cell contacts are cell tabs. This enables a relatively compact design of the battery pack. In particular, the pouch cells can be flat cells. Additionally or alternatively, one surface of the pouch cells can be rectangular. Furthermore, additionally or alternatively, the pouch cells can be arranged on top of or above each other in the stack, if present. Furthermore, additionally or alternatively, the pouch cells, in particular, can each have the cell tabs on the same edge, especially of the cell shell. Furthermore, additionally or alternatively, the cell tabs can be referred to as contact tabs.

[0033] In a further development of the invention, the at least one printed circuit board carries measuring electronics. The measuring electronics are designed or configured for the, in particular automatic, measurement of properties, especially values ​​of the properties, particularly of all, of the accumulator cells.

[0034] Additionally or alternatively, at least one circuit board carries power electronics. The power electronics are designed or configured for the control, in particular automatic control, and especially termination, of the output of electrical drive power from the battery pack and / or the absorption of electrical charging power by the battery pack, particularly depending on the measured properties, if any.

[0035] Additionally or alternatively, at least one printed circuit board carries user interface electronics and / or transmission electronics. The user interface electronics are designed or configured for, in particular, automatic interaction with a user. The transmission electronics are designed or configured for, in particular, automatic wireless transmission of at least one operating parameter and / or operating state.

[0036] The measuring electronics make it possible to detect safety-critical states of the battery cells.

[0037] The power electronics make it possible to minimize or even completely avoid safety-critical conditions of the battery cells and thus of the battery pack.

[0038] In particular, the properties can be stresses. In particular, the stresses can be mean stresses.

[0039] The user interface electronics can be configured to output the battery pack's charge level. Additionally or alternatively, the transmission electronics can be configured for unidirectional or bidirectional transmission of at least one operating parameter and / or operating state.

[0040] In a further development of the invention, the battery pack has several battery pack contacts. These contacts are designed and configured for the electrical connection between the battery pack and the processing device, supplying the processing device with electrical drive power from the battery pack. Furthermore, all battery pack contacts are arranged, and in particular all of them, at an end of the first battery pack housing part that is furthest, and in particular as far as possible, from the second battery pack housing part. This allows the battery pack contacts to be free from being enclosed by the potting compound. In particular, the battery pack contacts can be live, and in particular, can have live surfaces.Additionally or alternatively, "arranged at the far end of the first battery pack housing part" can mean that the battery pack contacts can be spaced a maximum of 20 mm, in particular a maximum of 10 mm, and in particular a maximum of 5 mm, from the far end of the first battery pack housing part. Furthermore, additionally or alternatively, the battery pack contacts can be arranged on a side of the cell block opposite the contact side, if present.

[0041] In a further development of the invention, the other battery pack housing part, in particular the first battery pack housing part, has at least one groove, especially for guiding the battery pack during mechanical connection with the processing device. The groove runs along the head contact surface in line with the thread. This allows the screw to be positioned in the groove and screwed into the thread from there. In particular, the groove can connect to the head contact surface. Additionally or alternatively, the groove can run in the direction of connection. Furthermore, additionally or alternatively, the groove can be accessible from outside the battery pack housing.

[0042] In particular, the second battery pack housing part can have the thread, and the first battery pack housing part can have the head mounting surface, and especially the groove. Therefore, relatively little length needs to be provided for the screw in the first battery pack housing part, and thus this space can be used for the groove and / or, especially with a predetermined groove length and battery pack housing length, for a relatively large length of the second battery pack housing part, particularly in the connection direction, and thus for a relatively large amount of potting compound within the second battery pack housing part.

[0043] In a further development of the invention, the first battery pack housing part has a number of air openings, in particular a number of air inlet openings. These air openings are arranged at an end of the first battery pack housing part adjacent to or near the second battery pack housing part, in particular between two grooves, if present. This allows cooling air to flow past the battery cells, especially the cell casings, for a relatively long distance, particularly if the second battery pack housing part has a thread and the first battery pack housing part has a head contact surface, and in particular a groove. In particular, the potting compound does not need to, or cannot, extend to the number of air openings.Additionally or alternatively, the first battery pack housing part can have a further number of air openings, in particular a number of air outlet openings, arranged at an end of the first battery pack housing part furthest from the second battery pack housing part, for a cooling airflow from one number of air openings, in particular a number of air inlet openings, past the battery cells to the other number of air openings, in particular a number of air outlet openings, for cooling the battery cells. Furthermore, additionally or alternatively, "arranged at the adjacent end of the first battery pack housing part" can mean that the number of air openings can be spaced a maximum of 20 mm, in particular a maximum of 10 mm, in particular a maximum of 5 mm, from the adjacent end of the first battery pack housing part.

[0044] In a further development of the invention, the battery pack, in particular the battery cells, has a maximum electrical drive power of at least 1 kilowatt (kW), in particular at least 2 kW, and / or at most 10 kW, in particular at most 5 kW.

[0045] Additionally or alternatively, the battery pack, in particular the battery cells, has a nominal voltage, in particular electrical voltage, of at least 10 volts (V), in particular of at least 20 V, and / or of at most 100 V, in particular of at most 50 V.

[0046] Additionally or alternatively, the battery pack, in particular the battery cells, has a maximum energy content, especially electrical, of at least 100 watt-hours (Wh), in particular at least 200 Wh, and / or of at most 1000 Wh, in particular at most 500 Wh.

[0047] Additionally or alternatively, the battery pack has a mass of at least 0.5 kilograms (kg), in particular at least 1 kg, and / or at most 10 kg, in particular at most 5 kg.

[0048] Additionally or alternatively, the battery pack, in particular the battery pack housing, has a height of at least 2.5 centimeters (cm) and / or a maximum of 10 cm, and / or a width of at least 5 cm and / or a maximum of 20 cm, and / or a depth or length, in particular in the direction of connection, of at least 7.5 cm and / or a maximum of 30 cm.

[0049] The machining system according to the invention comprises a, in particular the, battery pack as described above and an, in particular the, electrically driven machining device.

[0050] The battery pack and the processing device are designed or configured for electrical connection to each other, in particular for the automatic supply of electrical drive power to the processing device from the battery pack.

[0051] In particular, the processing system can be a gardening, forestry, and / or construction processing system. Additionally or alternatively, the processing tool can be a gardening, forestry, and / or construction processing tool. Furthermore, additionally or alternatively, the processing tool can be a hand-held, in particular ground-guided or hand-carried, processing tool. In particular, hand-held, in particular hand-carried, processing tool can mean that the processing tool can have a maximum mass of 50 kilograms (kg), in particular 20 kg, in particular 10 kg. Furthermore, additionally or alternatively, the processing tool can have an electric drive motor. Furthermore, additionally or alternatively, the battery pack and the processing tool can be designed for a detachable electrical connection, in particular without tools and / or without damage, in particular by means of a connector.Additionally or alternatively, the battery pack and the processing device can be designed for a mechanical connection to each other, in particular a detachable connection that can be made without tools and / or without damage. In particular, the processing device can be designed to support the battery pack.

[0052] In a further development of the invention, the processing device has a battery holder, in particular a battery compartment. The battery holder is designed or configured to receive the battery pack.

[0053] In a further development of the invention, the processing device is a saw, a pole pruner, a brush cutter, a hedge shear, a hedge trimmer, a blower, a leaf blower, a lopper, an angle grinder, a sweeper, a sweeping roller, a sweeping brush, a lawn mower, a scarifier or grass shears.

[0054] The inventive method for manufacturing a battery pack, in particular as described above, for supplying an electrically driven processing device with electrical drive power comprises the following steps: a) Arranging cell contacts, in particular those of several battery cells and at least one printed circuit board, wherein the at least one printed circuit board is electrically connected to the cell contacts, within a second battery pack housing part, in particular the second battery pack housing part, wherein the second battery pack housing part is designed as a mold for a potting compound. b) Enclosing the cell contacts and the at least one printed circuit board with the potting compound, in particular after step a).c) Arranging the accumulator cells inside the battery pack housing and closing the second battery pack housing part and one, in particular the first, battery pack housing part of the battery pack housing in a mixed order, especially after step b).

[0055] This method can offer the same advantages as the previously described battery pack.

[0056] In particular, in step a) and / or step b), the first battery pack housing part and the second battery pack housing part may be separated from each other or need not be sealed together. Additionally or alternatively, step b) may include: pouring or adding the potting compound inside the second battery pack housing part, especially in a liquid state. Furthermore, additionally or alternatively, step c) may include: arranging the battery cells inside the first battery pack housing part.

[0057] In a further development of the invention, step c) comprises: arranging and closing while the potting compound is in a liquid state. The method comprises step d) hardening the potting compound into a solid state, particularly after step c). This can enable potting or sealing of the battery pack housing, in particular a separation or interface between the first battery pack housing part and the second battery pack housing part, and / or an additional mechanical connection between the first battery pack housing part and the second battery pack housing part. Additionally or alternatively, this can enable compensation of manufacturing tolerances of the first battery pack housing part and / or the second battery pack housing part, particularly in contrast to arranging and closing while the potting compound is in a solid state. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Further advantages and aspects of the invention will become apparent from the claims and from the following description of preferred embodiments of the invention, which are explained below with reference to the figures. These figures show: Fig. 1 a perspective view of a machining system according to the invention comprising a battery pack according to the invention and an electrically driven machining device in the form of a saw, an angle grinder and a blower, Fig. 2 an exploded view of the battery pack of the Fig. 1 , Fig. 3 a perspective view of a first stack housing part of a stack housing of the battery pack of the Fig. 1 , Fig. 4 a perspective view of the first stack housing part, of accumulator cells, a pressure sensor and an internal temperature sensor of the battery pack of the Fig. 1 , Fig. 5 a perspective view of the first stack housing part, accumulator cells, pressure sensor and internal temperature sensor arranged in a stack of the battery pack of the Fig. 1 , Fig. 6 a perspective view of the first stack housing part, the stack and a second stack housing part of the stack housing of the battery pack of the Fig. 1 , Fig. 7 a perspective view of the first stack housing part, the stack, the second stack housing part and a circuit board of the battery pack of the Fig. 1 , Fig. 8 a perspective view of the first stack housing part, the stack, the second stack housing part, the circuit board, another circuit board and yet another circuit board of the battery pack of the Fig. 1 Fig. 9 shows a perspective view from the rear of the first stack housing part, the stack, the second stack housing part, the circuit board, the next circuit board, the next circuit board, and an external temperature sensor of the battery pack. Fig. 1 , Fig. 10 a perspective view of the external temperature sensor of the battery pack of the Fig. 1 Fig. 11 shows a sectional view of the accumulator cells, the circuit board, the next circuit board, the next circuit board, and a second battery pack housing part of a battery pack housing of the battery pack. Fig. 1 and a method according to the invention, Fig. 12 a sectional view of the accumulator cells, the circuit board, the further circuit board, the further circuit board and the second battery pack housing part of the battery pack of the Fig. 1 comprising potting compound and the inventive method, Fig. 13 a sectional view of the accumulator cells, the circuit board, the further circuit board, the further circuit board, the second battery pack housing part and a first battery pack housing part of the battery pack housing of the battery pack of the Fig. 1 comprising the potting compound and the inventive method, Fig. 14 a further sectional view of the accumulator cells, the circuit board, the further circuit board, the further circuit board, the second battery pack housing part and the first battery pack housing part of the battery pack of the Fig. 1 comprising the potting compound and the inventive method, Fig. 15 shows a further sectional view of the accumulator cells, the circuit board, the further circuit board, the further circuit board, the second battery pack housing part and the first battery pack housing part of the battery pack. Fig. 1 comprising the potting compound and the inventive method, Fig. 16 a perspective view of the battery pack housing of the battery pack of the Fig. 1 , and Fig. 17 an alternative arrangement of the first battery pack housing part and the second battery pack housing part of the battery pack of the Fig. 1 . DETAILED DESCRIPTION OF THE EXECUTION EXAMPLES

[0059] Fig. 1 bis 17 show a battery pack 1 according to the invention for supplying an electrically driven processing device 101 with electrical drive power AL and a method according to the invention for manufacturing the battery pack 1 for supplying the electrically driven processing device 101 with electrical drive power AL.

[0060] The battery pack 1 comprises several accumulator cells 21, at least one circuit board 52, 53, 54, and a battery pack housing 80. The accumulator cells 21 have cell contacts 22. The at least one circuit board 52, 53, 54 is electrically connected to the cell contacts 22, as shown in Fig. 7 , 14 and 15 shown. The battery pack housing 80 has a first battery pack housing part 81 and a second battery pack housing part 82. The first battery pack housing part 81 and the second battery pack housing part 82 are sealed together, as shown in Fig. 13 bis 17 shown. The accumulator cells 21 are arranged inside the battery pack housing 80.

[0061] Additionally, the cell contacts 22 and the at least one circuit board 52, 53, 54 are arranged within the second battery pack housing part 82, as shown in Fig. 13 bis 15 The second battery pack housing part 82 is designed as a mold for a potting compound 99. The cell contacts 22 and the at least one circuit board 52, 53, 54 are enclosed by the potting compound 99.

[0062] Additionally, at least one circuit board 52, 53, 54 is arranged inside the battery pack housing 80, in particular the second battery pack housing part 82. One battery pack housing part 82, in the illustrated embodiment the second battery pack housing part 82, has at least one thread 85, as shown in Fig. 11 and 12The other battery pack housing part 81, in the illustrated embodiment the first battery pack housing part 81, has at least one end contact surface 86, as shown in Fig. 13 bis 16 The head mounting surface 86 is located at an end 81V adjacent to one battery pack housing part 82 of the other battery pack housing part 81. The battery pack 1 has at least one screw 87. The screw 87 is screwed into the thread 85 for the mechanical connection of one battery pack housing part 82 and the other battery pack housing part 81 to each other and rests with a screw head 88 against the head mounting surface 86.

[0063] The method comprises the steps of: a) arranging the cell contacts 22 of the multiple accumulator cells 21 and the at least one circuit board 52, 53, 54, wherein the at least one circuit board 52, 53, 54 is electrically connected to the cell contacts 22, within the second battery pack housing part 82 of the battery pack housing 80, wherein the second battery pack housing part 82 is designed as a mold for the potting compound 99, as shown in Fig. 11 shown. b) Enclosing the cell contacts 22 and the at least one circuit board 52, 53, 54 with the potting compound 99, as shown in Fig. 12 shown. c) Arranging the accumulator cells 21 inside the battery pack housing 80, in particular the first battery pack housing part 81, and closing the second battery pack housing part 82 and the first battery pack housing part 81 of the battery pack housing 80 in a mixed fashion, as shown in Fig. 13 bis 16 shown.

[0064] In the illustrated embodiment, the battery pack 1 has ten accumulator cells 21. In alternative embodiments, the battery pack can have at least two accumulator cells.

[0065] Furthermore, in the illustrated embodiment, the battery pack 1 has three circuit boards 52, 53, 54. In alternative embodiments, the battery pack can have, in particular, only one, in particular only, two or at least four circuit boards.

[0066] In particular, the cell contacts 22 and the at least one circuit board 52, 53, 54 are live, and in particular have live surfaces. The potting compound 99 is electrically insulating and, in particular, thermally conductive.

[0067] Furthermore, in the illustrated embodiment, one battery pack housing part 82 has four threads 85, the other battery pack housing part 81 has four end faces 86, and the battery pack 1 has four screws 87. In alternative embodiments, one battery pack housing part can have, in particular, only one, two, three, or at least five threads; the other battery pack housing part can have, in particular, only one, two, three, or at least five end faces; and the battery pack can have, in particular, only one, two, three, or at least five screws.

[0068] Furthermore, in alternative embodiments, the first battery pack housing part can have at least one thread and the second battery pack housing part can have at least one head contact surface, wherein the head contact surface can be arranged at an end of the second battery pack housing part adjacent to the first battery pack housing part.

[0069] In particular, one battery pack housing part 82 has at least one blind hole, wherein the blind hole has the thread 85. The other battery pack housing part 81 has a through hole, wherein the through hole has the head contact surface 86 and the screw 87 is guided through the through hole to the thread 85.

[0070] Furthermore, in the illustrated embodiment, in step a) and in step b), the first battery pack housing part 81 and the second battery pack housing part 82 are separated from each other or not sealed together.

[0071] Furthermore, in the illustrated embodiment, step b) includes: pouring the potting compound 99 inside the second battery pack housing part 82, in particular in a liquid state.

[0072] In particular, in step b) and in step c), the second battery pack housing part 82 is oriented with an opening facing upwards, as shown in Fig. 12 bis 17 shown, in particular, that the potting compound 99 cannot flow out of the second battery pack housing part 82 in its liquid state.

[0073] Furthermore, in the illustrated embodiment, step c) includes: arranging the accumulator cells 21 within the first battery pack housing part 81.

[0074] In particular, in step c) and thereafter, an opening of the first battery pack housing part 81 faces the second battery pack housing part 82, and the opening of the second battery pack housing part 82 faces the first battery pack housing part 81. The first battery pack housing part 81 and the second battery pack housing part 82 are connected or in contact with each other in a connection direction y.

[0075] Furthermore, in the illustrated embodiment, the method includes the step: screwing the screw 87 into the thread 85 to mechanically connect one battery pack housing part 82 and the other battery pack housing part 81 to each other until the screw 87 with the screw head 88 rests against the head contact surface 86, in particular after step c).

[0076] In particular, the thread 85 and the screw 87 run in the connection direction y.

[0077] In detail, the first battery pack housing part 81' a housing container81' and the second battery pack housing part 82 is a housing cover 82'.

[0078] In the illustrated embodiment, the accumulator cells 21 have cell shells 21Z.

[0079] In particular, the cell contacts 22 and the cell shells 21Z are electrically insulated from each other.

[0080] The cell shells 21Z are arranged inside the housing container 82'.

[0081] Furthermore, the potting compound 99, in particular a fill level or a pouring level of the potting compound 99, extends at least to the cell walls 21Z, in particular upwards and / or in the connection direction y, as shown in Fig. 12 bis 15 and 17 shown.

[0082] Additionally, in Fig. 17 the potting compound 99, in particular the filling level of the potting compound 99, in particular exactly, up to an end 82R of the second battery pack housing part 82 adjacent to the first battery pack housing part 81, in particular upwards and / or in the connection direction y.

[0083] Additionally, in Fig. 17 the potting compound 99, in particular the filling level of the potting compound 99, at least to the adjacent end 81V of the first battery pack housing part 81, in particular upwards and / or in the connection direction y.

[0084] In detail covered in Fig. 13 bis 16 the first battery pack housing part 81 outside the second battery pack housing part 82 inside.

[0085] In Fig. 17 The second battery pack housing part 82 covers the first battery pack housing part 81 on the outside. Thus, the potting compound 99 is positioned between the second battery pack housing part 82 and the first battery pack housing part 81. The potting compound 99 therefore seals the battery pack housing 80, in particular a separation or interface between the first battery pack housing part 81 and the second battery pack housing part 82, and mechanically connects the first battery pack housing part 81 and the second battery pack housing part 82.

[0086] Furthermore, step c) includes: arranging and sealing while the potting compound 99 is in the liquid state. The process includes step d) hardening the potting compound 99 into a solid state.

[0087] In particular, in step d) the second battery pack housing part 82 is oriented with the opening facing upwards, as shown in Fig. 12 bis 17 shown, in particular, that the potting compound 99 cannot flow out of the second battery pack housing part 82 in its liquid state.

[0088] In detail, it appears in Fig. 17 In step c) the first battery pack housing part 81 with the adjacent end 81V into the potting compound 99 in the liquid state, in particular downwards and / or against the connection direction y.

[0089] Furthermore, the cell contacts 22 and the at least one circuit board 52, 53, 54 are enclosed by the potting compound 99 in a common potting block 98.

[0090] Furthermore, the accumulator cells 21 are designed and arranged in a cell block 20, in particular a stack 20', such that the cell contacts 22 are arranged on a common contact side, in particular front, 20V of the cell block 20, as shown in Fig. 5 shown.

[0091] In the illustrated embodiment, the cell block 20 is arranged with the contact side 20V facing forward, in particular opposite to the connection direction y, within the second battery pack housing part 82 and / or the contact side 20V is orthogonal to the connection direction y, as shown in Fig. 11 bis 15 shown.

[0092] In detail, the at least one circuit board 52, 53, 54 is arranged on the contact side, in particular the front, 20V, in particular with a plate plane 52E, 53E, 54E parallel to the contact side 20V, as shown in Fig. 7 , 8 and 11 bis 15 shown.

[0093] Furthermore, the accumulator cells 21 are pouch cells 21' and the cell contacts 22 are cell tabs 22'.

[0094] In the illustrated embodiment, the pouch cells 21' are arranged in the stack 20' in a stacking direction z, in particular orthogonal to the connection direction.

[0095] Furthermore, in the illustrated embodiment, the cell tabs 22', in particular each, of the next pouch cells 21', are electrically connected to each other by a material-bonded connection, in particular a welded connection, in particular directly. In particular, the pouch cells 21' are connected in series, in particular in the stacking direction.

[0096] Furthermore, in the illustrated embodiment, the battery pack 1 has a stacking housing 10, in particular a solid one. The stacking housing 10 has a first stacking housing part 11, as shown in Fig. 3 shown, and a second stacking housing part 12, as shown in Fig. 6 The stack 20' is arranged between the first stack housing part 11 and the second stack housing part 12. The first stack housing part 11 and the second stack housing part 12 are mechanically connected to each other, in particular directly, by at least one material-bonded connection, in particular a welded connection, as shown in Fig. 7 shown.

[0097] In detail, the first stacking housing part 11 has a first stacking housing wall 13. The second stacking housing part 12 has a second stacking housing wall 14. The second stacking housing wall 14 is arranged opposite the first stacking housing wall 13 at a distance 10A, in particular a fixed distance, especially in the stacking direction z, as shown in Fig. 6 The stack 20' is arranged between the first stack housing wall 13 and the second stack housing wall 14. A height 20H of the stack 20', particularly in the stacking direction z, is limited by the stack housing wall 13 and the second stack housing wall 14, in particular by their distance 10A.

[0098] Furthermore, the stacking housing 10 is cuboid in shape and has at least four, or in the illustrated embodiment five, stacking housing walls 13, 14, 15, 16, 17. The first stacking housing part 11 has the first stacking housing wall or top wall 13, the stacking housing wall, in particular the circumferential side wall, 15 and the stacking housing wall, in particular the rear wall, 17. The second stacking housing part 12 has the second stacking housing wall or bottom wall 14 and the stacking housing wall, in particular the circumferential side wall, 16.

[0099] Furthermore, the stacking housing 10 has a common stacking housing opening 10O, defined in particular by the stacking housing walls 13, 14, 15, 16. The pouch cells 21' are designed and arranged in the stack 20' within the stacking housing 10 such that the cell tabs 22' are located on the common contact side, in particular the front side, 20V of the stack 20' at the common stacking housing opening 10O.

[0100] In particular, the stacking housing 10 is arranged inside the battery pack housing 80, and is specifically an inner housing and not accessible from the outside. Furthermore, the potting compound 99, in particular a fill level or pouring level of the potting compound 99, extends at least to the stacking housing 10, especially upwards and / or in the connection direction y, as shown in Fig. 12 bis 15 and 17 shown. Furthermore, the stacking housing 10 is not gas-tight, in particular gas can escape from the stacking housing 10. In addition, the stacking housing 10, in particular the stacking housing walls 13, 14, 15, 16, 17, are electrically insulated from the pouch cells 21'.

[0101] Furthermore, in the illustrated embodiment, the battery pack 1 has at least one electrical power connector 29, and in the illustrated embodiment, two power connectors 29, as shown in Fig. 8 The electrical power connector 29 is electrically connected to one of the cell tabs 22' by a material-bonded connection, in particular a welded connection, and in particular directly.

[0102] In particular, the at least one electrical power connector 29 is live, and especially has a live surface. Furthermore, the at least one electrical power connector 29 is arranged within the second battery pack housing part 82. Finally, the at least one electrical power connector 29 is enclosed by the potting compound 99.

[0103] In addition, the circuit board 52 carries measuring electronics 55, as shown in Fig. 7 shown. The measuring electronics 55 are designed for measuring properties, in particular voltages SP, of the accumulator cells 22.

[0104] In the illustrated embodiment, the circuit board 52, in particular the measuring electronics 55, is electrically connected to several of the cell contacts 22, in particular cell tabs 22', by means of electrical cell connectors 52eV.

[0105] In particular, the electrical cell connectors are live (52 eV) and have live surfaces. Furthermore, the electrical cell connectors are located within the second battery pack housing part 82. Additionally, the electrical cell connectors are enclosed by the potting compound 99.

[0106] Additionally, the circuit board 53 carries, in particular further, power electronics 56, as shown in Fig. 8 The power electronics 56 are designed to control the output of the electrical drive power AL from the battery pack 1 and / or the absorption of electrical charging power LL by the battery pack 1, in particular depending on the measured properties.

[0107] In the illustrated embodiment, the further circuit board 53 is arranged further away from the cell block 20, in particular stack 20', than the circuit board 52.

[0108] Furthermore, in the illustrated embodiment, the additional circuit board 53, in particular the power electronics 56, is electrically connected to the circuit board 52, in particular the measuring electronics 55.

[0109] Furthermore, in the illustrated embodiment, the additional circuit board 53, in particular the power electronics 56, is electrically connected to the at least one electrical power connector 29.

[0110] Additionally, the circuit board 54 carries, in particular, a further circuit board 54, user interface electronics 57 and transmission electronics 58. The user interface electronics 57 are designed for interaction with a user. The transmission electronics 58 are designed for wireless transmission of at least one operating parameter and / or operating state.

[0111] In the illustrated embodiment, the further circuit board 54 is arranged further away from the cell block 20, in particular stack 20', than the circuit board 52, and in particular than the further circuit board 53, specifically at an end 82V of the second battery pack housing part 82 that is remote from the first battery pack housing part 81, as shown in Fig. 11 bis 15 shown.

[0112] Furthermore, in the illustrated embodiment, the user interface electronics 57 are designed to output, in particular display, a charge status of the battery pack 1.

[0113] Furthermore, in the illustrated embodiment, the additional circuit board 54, in particular the user interface electronics 57 and the transmission electronics 58, is electrically connected to the circuit board 52, in particular the measuring electronics 55, and / or the additional circuit board 53, in particular the power electronics 56.

[0114] Furthermore, in the illustrated embodiment, the at least circuit board 52, 53, 54 has a recess 52O, 53O, 54O, in particular a through-hole. The recess 52O, 53O, 54O is designed for the passage of a sensor line 30L, for a flow of the potting compound 99 and / or for positioning the at least one circuit board 52, 53, 54, in particular the circuit boards 52, 53, 54 relative to each other.

[0115] Furthermore, in the illustrated embodiment, the battery pack 1 has a pressure sensor 31, as shown in Fig. 4 The pressure sensor 31 is designed to detect, and in particular measure, a pressure force DF, especially in the stacking direction z, acting on the pouch cells 21'. Furthermore, the battery pack 1 has an internal temperature sensor 36. The internal temperature sensor 36 is designed to measure an internal temperature T36 of the stack 20'. The sensor line 30L connects the pressure sensor 31 and the internal temperature sensor 36. The circuit board 52, and in particular the measuring electronics 55, is electrically connected to the pressure sensor 31 and the internal temperature sensor 36 via the sensor line 30L.

[0116] In particular, the sensor cable 30L is electrically insulated except for one end on the circuit board 52. The circuit board end of the sensor cable 30L is located inside the second battery pack housing part 82. Furthermore, the circuit board end of the sensor cable 30L is enclosed by the potting compound 99.

[0117] Furthermore, in the illustrated embodiment, the battery pack 1 has an external temperature sensor 37, as shown in Fig. 9 and 10 The external temperature sensor 37 is designed to measure an external temperature T37 of the stack 20'. The circuit board 52, in particular the measuring electronics 55, is electrically connected to the temperature sensor 37 by means of a further sensor line 30L'.

[0118] In particular, the additional sensor cable 30L' is electrically insulated except for one end at the circuit board 52. The circuit board-side end of the additional sensor cable 30L' is located within the second battery pack housing part 82. Furthermore, the circuit board-side end of the additional sensor cable 30L' is enclosed by the potting compound 99.

[0119] Furthermore, in the illustrated embodiment, the power electronics 56 are designed to control the output of the drive power AL from the battery pack 1 and / or the intake of the charging power LL by the battery pack 1 as a function of the detected, in particular measured, pressure force DF, the measured internal temperature T36 and the measured external temperature T37.

[0120] Furthermore, battery pack 1 has several battery pack contacts 71, as shown in Fig. 9 The battery pack contacts 71 are designed for the electrical connection of the battery pack 1 and the processing device 101 to supply the processing device 101 with the electrical drive power AL from the battery pack 1. Furthermore, the battery pack contacts 71 are arranged at an end 81R of the first battery pack housing part 81, which is remote from the second battery pack housing part 82.

[0121] In the illustrated embodiment, the battery pack contacts 71 are arranged on one of the contact sides, in particular the front, 20V of the cell block 20 opposite the rear side 20R of the cell block 20, in particular on the stacking housing 10, in particular on the stacking housing wall or rear wall 17.

[0122] In addition, in the illustrated embodiment, the further circuit board 53, in particular the power electronics 56, is electrically connected to the battery pack contacts 71 by means of power lines 71L.

[0123] In particular, the power lines 71L are power busbars, specifically metallic stamped and bent elements, which are covered with heat-shrink tubing for electrical insulation. In other words, the power lines 71L are electrically insulated except for one end, specifically each end, at the further circuit board 53 and at the battery pack contacts 71. The circuit board end of the power line 71L is located within the second battery pack housing part 82. Furthermore, the circuit board end of the power line 71L is enclosed by the potting compound 99.

[0124] Furthermore, the battery pack 1 has several data contacts 72, as shown in Fig. 9 shown. The data contacts 72 are located at the remote end 81R of the first battery pack housing part 81.

[0125] In the illustrated embodiment, the data contacts 72 are arranged on the back side 20R of the cell block 20, in particular on the stacking housing 10, especially on the stacking housing wall or back wall 17.

[0126] Furthermore, in the illustrated embodiment, the circuit board 52, in particular the measuring electronics 55, is electrically connected to the data contacts 72 by means of a data line 72L.

[0127] In particular, the data line 72L is electrically insulated except for one end, in particular each end, at the circuit board 52 and at the data contacts 72. The circuit board-side end of the data line 72L is arranged inside the second battery pack housing part 82.

[0128] Furthermore, the circuit board-side end of the data line 72L is enclosed by the potting compound 99.

[0129] Thus, all live components, especially live surfaces, are enclosed within the second battery pack housing part 82 or not at the remote end 81R of the first battery pack housing part 81 by the potting compound 99.

[0130] Furthermore, the other battery pack housing part 81, in the illustrated embodiment the first battery pack housing part 81, has at least one groove 89, in particular for guiding the battery pack 1 during mechanical connection with the processing device 101, as shown in Fig. 13 bis 16 shown. The groove 89 runs along the head contact surface 86 in extension of the thread 85, in particular in the connection direction y.

[0131] In the illustrated embodiment, the other battery pack housing part 81 has four grooves 89. In alternative embodiments, the other battery pack housing part can have only one, in particular a single, two, three, or at least five grooves. Additionally or alternatively, in alternative embodiments, the second battery pack housing part can have at least one groove.

[0132] Furthermore, the first battery pack housing part 81 has a number of air openings 91, in particular a number of air inlet openings, as shown in Fig. 13 bis 16 The number of air openings 91 is arranged at the adjacent end 81V of the first battery pack housing part 81, in particular between two grooves 89.

[0133] In the illustrated embodiment, the battery pack 1, in particular the first battery pack housing part 81, has at least one air cooling circuit 90 having the number of air inlet openings 91 and a number of air outlet openings 92 in the battery pack housing 80, in particular the first battery pack housing part 81, for a cooling air flow LS from the number of air inlet openings 91 at the battery cells 21, in particular the stack housing 10, past the number of air outlet openings 92 for cooling the battery cells 21.

[0134] In particular, the number of air outlet openings 92 is arranged at the remote end 81R of the first battery pack housing part 81.

[0135] Furthermore, the external temperature sensor 37 is arranged in the air cooling circuit 90 between the number of air inlet openings 91 and the number of air outlet openings 92, in particular facing the number of air inlet openings 91 and / or the number of air outlet openings 92.

[0136] Furthermore, in the illustrated embodiment, the stacking housing 10 has a thermal connection with the accumulator cells 21, in particular the pouch cells 21', and is thermally conductive. This enables heat dissipation from the accumulator cells 21 via the stacking housing 10 and / or the potting compound 90 to the outside, in particular downwards and / or against the connection direction y.

[0137] In particular, the stacking housing 10, in particular the stacking housing walls 13, 14, 15, 16, 17, touch the pouch cells 21' and thermal paste is applied between the pouch cells 21' and the stacking housing walls 15, 16, 17.

[0138] Furthermore, in the illustrated embodiment, the battery pack 1 has at least one thermal insulation 60, in particular a foam, as shown in Fig. 4 bis 6 shown. The at least one thermal insulation 60 is arranged between each of the pouch cells 21' and extends over a large part of the area 21F of the pouch cells 21.

[0139] In addition, in the illustrated embodiment, the at least one thermal insulation 60 is a buffer element. The at least one buffer element 60 is designed to buffer any swelling of the pouch cells 21', particularly in the stacking direction z, by means of a buffer thickness 60D of the at least one buffer element 60.

[0140] In the illustrated embodiment, the battery pack 1 has five thermal insulations 60. In alternative embodiments, the battery pack may have only a single thermal insulation.

[0141] Furthermore, in the illustrated embodiment, the battery pack 1 has a maximum electrical drive power MAL of 3 kW. In alternative embodiments, the battery pack can have a maximum electrical drive power of at least 1 kW and / or at most 10 kW.

[0142] Additionally, in the illustrated embodiment, the battery pack 1 has a nominal voltage NSP of 36 V. In alternative embodiments, the battery pack can have a nominal voltage of at least 10 V and / or at most 100 V.

[0143] Additionally, in the illustrated embodiment, the battery pack 1 has a maximum energy content MEI of 337 Wh. In alternative embodiments, the battery pack can have a maximum energy content of at least 100 Wh and / or at most 1000 Wh.

[0144] Additionally, in the illustrated embodiment, the battery pack 1 has a mass m1 of 2 kg. In alternative embodiments, the battery pack can have a mass of at least 0.5 kg and / or at most 10 kg.

[0145] In the illustrated embodiment, the battery pack 1 additionally has a height 1H, particularly in the stacking direction z, of 5 cm, a width 1B, particularly in a direction x orthogonal to the stacking direction z and / or the connection direction y, of 10 cm, and a depth 1T, particularly in the connection direction y, of 15 cm. In alternative embodiments, the battery pack can have a height of at least 2.5 cm and / or at most 10 cm, and / or a width of at least 5 cm and / or at most 20 cm, and / or a depth of at least 7.5 cm and / or at most 30 cm.

[0146] Fig. 1 Figure 1 shows a machining system 100 according to the invention. The machining system 100 comprises the battery pack 1 and an electrically driven machining device 101. The battery pack 1 and the machining device 101 are designed to be electrically connected to each other for supplying the machining device 101 with electrical drive power AL from the battery pack 1, in particular electrically connected.

[0147] In detail, the processing device 101 has a battery holder 102. The battery holder 102 is designed to receive the battery pack 1. In particular, the battery pack 1 is received in it.

[0148] In Fig. 1The electrically powered processing device 101 is a saw 101', an angle grinder 101" or a blower 101‴. In alternative embodiments, the processing device can be a pole pruner, a brush cutter, a hedge trimmer, a leaf blower, a lopper, a sweeper, a sweeping roller, a sweeping brush, a lawn mower, a scarifier or grass shears.

[0149] As the exemplary embodiments shown and explained above make clear, the invention provides a battery pack for supplying an electrically driven machining device with electrical drive power, a machining system comprising such a battery pack and an electrically driven machining device, and a method for manufacturing a battery pack for supplying an electrically driven machining device with electrical drive power, wherein the battery pack and the method each have improved properties.

Claims

1. Battery pack (1) for supplying an electrically driven treatment apparatus (101) with an electric driving power (AL), the battery pack (1) comprising: - a plurality of accumulator cells (21), wherein the accumulator cells (21) have cell contacts (22), - at least one circuit board (52, 53, 54), wherein the at least one circuit board (52, 53, 54) is electrically connected to the cell contacts (22), and - a battery pack housing (80), wherein the battery pack housing (80) has a first battery pack housing part (81) and a second battery pack housing part (82), wherein the first battery pack housing part (81) and the second battery pack housing part (82) are closed by each other, - wherein the accumulator cells (21) are disposed within the battery pack housing (80), characterized - in that the cell contacts (22) and the at least one circuit board (52, 53, 54) are disposed within the second battery pack housing part (82), wherein the second battery pack housing part (82) is configured as a mold for a casting compound (99), and wherein the cell contacts (22) and the at least one circuit board (52, 53, 54) are enclosed by the casting compound (99), and / or - in that the at least one circuit board (52, 53, 54) is disposed within the battery pack housing (80), wherein the one battery pack housing part (82) has at least one thread (85), wherein the other battery pack housing part (81) has at least one head abutment surface (86), wherein the head abutment surface (86) is disposed on an end (81V) adjacent to the one battery pack housing part (82) of the other battery pack housing part (81), wherein the battery pack (1) has at least one screw (87), wherein the screw (87) is screwed into the thread (85) for mechanical connection of the one battery pack housing part (82) and the other battery pack housing part (81) to each other, and a screw head (88) bears on the head abutment surface (86).

2. Battery pack (1) according to claim 1, - wherein the first battery pack housing part (81) is a housing container (81') and wherein the second battery pack housing part (82) is a housing cover (82').

3. Battery pack (1) according to any of the preceding claims, - wherein the accumulator cells (21) have cell shells (21Z), wherein the casting compound (99) reaches at least up to the cell shells (21Z), and / or - wherein the casting compound (99) reaches up to an end (82R) adjacent to the first battery pack housing part (81) of the second battery pack housing part (82), and / or - wherein the casting compound (99) reaches at least up to an end (81V) adjacent to the second battery pack housing part (82) of the first battery pack housing part (81).

4. Battery pack (1) according to any of the preceding claims, - wherein the cell contacts (22) and the at least one circuit board (52, 53, 54) are enclosed by the casting compound (99) in a common casting block (98).

5. Battery pack (1) according to any of the preceding claims, - wherein the accumulator cells (21) are configured and disposed in a cell block (20) such that the cell contacts (22) are disposed on a common contact side (20V) of the cell block (20).

6. Battery pack (1) according to claim 5, - wherein the at least one circuit board (52, 53, 54) is disposed on the contact side (20V).

7. Battery pack (1) according to any of the preceding claims, - wherein the accumulator cells (21) are pouch cells (21') and wherein the cell contacts (22) are cell tabs (22').

8. Battery pack (1) according to any of the preceding claims, - wherein the at least one circuit board (52) holds measurement electronics (55), wherein the measurement electronics (55) are configured for measuring properties (SP, T36, T37, DF) of the accumulator cells (21).

9. Battery pack (1) according to any of the preceding claims, the battery pack (1) comprising: - a plurality of battery pack contacts (71), wherein the battery pack contacts (71) are configured for electrical connection of the battery pack (1) and the treatment apparatus (101) together for supplying the treatment apparatus (101) with the electric driving power (AL) from the battery pack (1) and disposed on an end (81R) remote from the second battery pack housing part (82) of the first battery pack housing part (81).

10. Battery pack (1) according to any of the preceding claims, - wherein the at least one circuit board (52, 53, 54) is disposed within the battery pack housing (80), wherein the one battery pack housing part (82) has the at least one thread (85), wherein the other battery pack housing part (81) has the at least one head abutment surface (86), wherein the head abutment surface (86) is disposed on the end (81V) adjacent to the one battery pack housing part (82) of the other battery pack housing part (81), wherein the battery pack (1) has the at least one screw (87), wherein the screw (87) is screwed into the thread (85) for mechanical connection of the one battery pack housing part (82) and the other battery pack housing part (81) to each other, and the screw head (88) bears on the head abutment surface (86), and - wherein the other battery pack housing part (81) has at least one groove (89), wherein the groove (89) extends on the head abutment surface (86) in prolongation of the thread (85).

11. Battery pack (1) according to any of the preceding claims, - wherein the first battery pack housing part (81) has a number of air openings (91), wherein the number of air openings (91) are disposed on an end (81V) adjacent to the second battery pack housing part (82) of the first battery pack housing part (81).

12. Battery pack (1) according to any of the preceding claims, - wherein the battery pack (1) has a maximum electric driving power (MAL) of a minimum of 1 kW, in particular a minimum of 2 kW, and / or of a maximum of 10 kW, in particular a maximum of 5 kW.

13. Treatment system (100), the treatment system (100) comprising: - a battery pack (1) according to any of the preceding claims, and - an electrically driven treatment apparatus (101), - wherein the battery pack (1) and the treatment apparatus (101) are configured for electrical connection with each other for supplying the treatment apparatus (101) with electric driving power (AL) from the battery pack (1).

14. Method for the production of a battery pack (1), in particular according to any of claims 1 to 12, for supplying an electrically driven treatment apparatus (101) with electric driving power (AL), the method comprising the steps: a) disposing cell contacts (22) of a plurality of accumulator cells (21) and at least one circuit board (52, 53, 54), wherein the at least one circuit board (52, 53, 54) is electrically connected to the cell contacts (22), within a second battery pack housing part (82) of a battery pack housing (80), wherein the second battery pack housing part (82) is configured as a mold for a casting compound (99), b) enclosing the cell contacts (22) and the at least one circuit board (52, 53, 54) by the casting compound (99), and c) disposing the accumulator cells (21) within the battery pack housing (80) and closing the second battery pack housing part (82) and a first battery pack housing part (81) of the battery pack housing (80) by each other.

15. Method according to claim 14, - wherein the step c) comprises: disposing and closing while the casting compound (99) is in a liquid state, and - wherein the method comprises the step: d) hardening the casting compound (99) in a solid state.