Electrical battery pack, method and electrical battery system

Abstract

The invention relates to an electrical battery pack (1) for an electrical battery system (100), the electrical battery pack (1) comprising: a substantially cylindrical electrical battery cell (2) which extends axially in a cell height direction (Z) and which has two electrical cell contact sections (3); at least one electrically conductive connection device (30) for conducting an electric current to one of the two cell contact sections (3) and / or out of one of the two cell contact sections (3), the connection device (30) having an electrically conductive contact section (4) for electrically contacting one of the two cell contact sections (3), the contact section is electrically and directly mechanically connected to one of the two cell contact sections; and an electrically conductive connection section for conducting an electric current to and / or out of the contact section.

Description

Field of the Invention

[0001] The present invention relates to an electrical battery pack for an electrical battery system. Furthermore, the present invention relates to a method for manufacturing such an electrical battery pack. Furthermore, the present invention relates to an electrical battery system having such an electrical battery pack. Summary of the Invention

[0002] It is an object of the present invention to provide an electrical battery pack for an electrical battery system, a method for manufacturing such an electrical battery pack, and an electrical battery system having such an electrical battery pack, which in particular respectively have improved characteristics.

[0003] This object is solved by the subject matter of the independent claims. Preferred embodiments are the subject matter of the dependent claims.

[0004] The electrical battery pack according to the invention (English: battery pack) is provided for an electrical battery system. In particular, the electrical battery pack is configured for use in an electrical battery system. The electrical battery pack has a substantially cylindrical electrical battery cell. The substantially cylindrical electrical battery cell extends axially along the cell height direction. Suitably, the battery cell is configured to store electrical energy. The battery cell has two electrical cell contact sections. These two cell contact sections are oppositely polarized in the state where the battery cell is charged with electrical energy. Thus, in the state where the battery cell is charged with electrical energy, a voltage can exist on the two cell contact sections. The electrical battery pack has at least one electrically conductive connecting device. The connecting device is configured to conduct current to one of the two cell contact sections and, as an alternative or in addition, conduct current away from one of the two cell contact sections. In particular, the conducted current depends on whether the battery cell is being charged or discharged. Here, the connecting device has an electrically conductive contact section. The electrically conductive contact section is configured to electrically contact in particular only one of the two cell contact sections, wherein the contact section is electrically connected to one of the two cell contact sections and is directly mechanically connected. Furthermore, the connecting device has an electrically conductive connecting section. The electrically conductive connecting section is configured to conduct current to the contact section and, as an alternative or in addition, conduct current away from the contact section, wherein the contact section electrically connects the connecting section to one of the two cell contact sections and is indirectly mechanically connected. Thus, in particular, the connecting section is indirectly mechanically connected to one of the two cell contact sections through the contact section. The contact section has a contact section thickness. The connecting section has a connecting section thickness. In particular, the connecting section has a connecting section thickness beside the contact section and, as an alternative or in addition, on the contact section. The contact section thickness is less than the connecting section thickness.

[0005] Before the connection section is electrically connected to one of the two single-cell contact sections by means of the contact section, the contact section, which is constructed thinner than the connection section, can advantageously first be connected to one of the two single-cell contact sections, in particular to one of the single-cell contact sections that is constructed particularly thinly. In this way, on the one hand, a sufficient cross-section can be provided by means of the connection section for the transmission of current, and at the same time, by means of the thinner contact section, a challenging mechanical connection between the thicker connection section and the thinner single-cell contact section can be achieved.

[0006] "Substantially cylindrical" can, in the context of this document, take into account the presence of corners and, as an alternative or in addition, rounded edges at the transition between the end side of a substantially cylindrical battery cell and the outer peripheral surface of the battery cell. As an alternative or in addition, "substantially cylindrical" can take into account the presence of unevenness and / or contours on one of the end sides of the battery cell. "Substantially cylindrical" can take into account, in particular, a spherical shaping of the outer peripheral surface.

[0007] "Substantially cylindrical", in the context of this document, can, in particular as an alternative or in addition, relate to the general shaping of a cylinder. It is thus conceivable that a substantially cylindrical battery cell, for example, has a prismatic, in particular square, shaping. Preferably, a substantially cylindrical battery cell has a substantially cylindrical shaping. A substantially cylindrical battery cell can be synonymously referred to as a "battery-round cell". In particular, a substantially cylindrical battery cell is not a pouch cell.

[0008] Possible "thicknesses" can, in the context of this document, be measured along the extreme, i.e. minimum or maximum, extent of a section that has a thickness and that is, in particular, formed in a planar manner. In particular, the contact section thickness is measured at the minimum extent of the contact section. In particular, the connection section thickness is measured at the maximum extent of the connection section. As an alternative or in addition, possible thicknesses can be related to the average thickness. In particular, if a section that has a thickness extends substantially perpendicularly to the cell height direction in a planar manner and, as an alternative or in addition, slightly elongately, the corresponding thickness can, in particular, be measured along the cell height direction.

[0009] The concepts "configured" or "arranged" can be used synonymously with the concept "constructed".

[0010] The concepts "comprising" or "having" can be used synonymously with the concept "including".

[0011] The phrase "and as an alternative or in addition" can be replaced with "and / or" with the same meaning.

[0012] It is expedient for the connection section to be electrically connected to one of the two single-cell contact sections only indirectly by means of the contact section.

[0013] Advantageously, the contact section is essentially only present in the region of the connecting device in which the connecting device electrically contacts, in particular directly contacts, one of the two single-cell contact sections.

[0014] Advantageously, the contact section tapers in thickness relative to the connecting section and, as an alternative or in addition, becomes thinner.

[0015] Advantageously, the battery single cell having a substantially cylindrical configuration has an axial single-cell height and a single-cell diameter measured perpendicular to the single-cell height. The single-cell diameter can be from 10 mm to 30 mm. As an alternative or in addition, the single-cell height can be from 40 mm to 78 mm.

[0016] In a design of the present invention, the two single-cell contact sections of the battery single cell are arranged opposite to each other along the single-cell height direction and, as an alternative or in addition, are particularly arranged on the end sides respectively. As an alternative or in addition, the two single-cell contact sections of the battery single cell are arranged offset from each other perpendicular to the single-cell height direction, particularly in the radial direction. The corresponding single-cell contact sections can be formed by disk-shaped and / or cap-shaped contact elements of the battery single cell.

[0017] In another design of the present invention, in particular at least one of the two single-cell contact sections has a single-cell contact section thickness of 0.05 mm to 0.4 mm, particularly 0.15 mm to 0.3 mm. As an alternative or in addition, the contact section thickness is 0.05 mm to 0.4 mm, particularly 0.15 mm to 0.3 mm. As an alternative or in addition, the connecting section has a connecting section thickness of 0.4 mm to 1.0 mm, particularly 0.5 mm to 0.7 mm.

[0018] Advantageously, the connecting section thickness can correspond to 1.5 to 5 times the single-cell contact section thickness and, as an alternative or in addition, correspond to the contact section thickness.

[0019] In another design of the present invention, one of the two single-cell contact sections is connected to the contact section in a material-fit manner and, as an alternative or in addition, in a form-fit manner and, as an alternative or in addition, in a force-fit manner.

[0020] Advantageously, one of the two single-cell contact sections is welded to the contact section, especially without welding additives. One of the two single-cell contact sections can be welded to the contact section, especially without welding additives, by means of laser welding or by means of resistance welding. As an alternative or in addition, one of the two single-cell contact sections can be electrically connected to the contact section by means of Klett welding, by means of screws, by means of snap elements, by means of rivets, by means of soldering, by means of bonding and by means of press fitting, especially by means of cutting contacts provided on one of the two single-cell contact sections and, as an alternative or in addition, on the contact section.

[0021] In another embodiment of the invention, one of the two single-cell contact sections has a nickel-plated steel sheet material. As an alternative or in addition, the contact section has, especially the same, identical or different, nickel-plated steel sheet material and, as an alternative or in addition, has a sheet material. As an alternative or in addition, the connecting section has a copper sheet material.

[0022] Advantageously, the steel sheet material corresponds to the standard designation "CC01".

[0023] Advantageously, the copper sheet material can be or is pure copper (Cu). The copper sheet material can have a copper alloy with at least 98 mass percent copper (Cu) or consist of such a copper alloy.

[0024] In another embodiment of the invention, the contact section is arranged sandwich-like directly, especially protruding or non-protruding, between one of the two single-cell contact sections and the connecting section. As an alternative or in addition, the connecting section is arranged offset, especially protruding, relative to one of the two single-cell contact sections transversely to the single-cell height direction.

[0025] In another embodiment of the invention, the contact section passes completely into the connecting section and, as an alternative or in addition, completely into one of the two single-cell contact sections. As an alternative or in addition, the connecting section is displaced onto the contact section and, as an alternative or in addition, bent onto the contact section. Thus, the connecting section can be at least partially wrapped and / or surrounded by the contact section. As an alternative or in addition, the connecting section can be at least partially wrapped and / or surrounded by the single-cell contact section. It is also conceivable that the contact section is bent onto the connecting section and / or the connecting section is displaced onto itself.

[0026] In another design of the present invention, the contact section is owned by a component of the battery pack, and this component is constructed differently from, especially separately from, the connection section and, as an alternative or in addition, is constructed differently from, especially separately from, one of the two single-cell contact sections. It goes without saying that this design of the present invention can be used as an alternative to the design mentioned in the previous description paragraphs of the present invention.

[0027] In another design of the present invention, the component has a displacement section, which is constructed differently from, especially completely transferred into, the contact section. Here, the displacement section and the connection section are displaced together such that the connection section is arranged between the displacement section and the contact section, especially where the connection section is directly connected to the displacement section and to the contact section respectively and, as an alternative or in addition, is materially connected.

[0028] In another design of the present invention, one of the two single-cell contact sections has an especially annular connection area. Here, the contact section is directly connected to one of the two single-cell contact sections only within the connection area and, as an alternative or in addition, is materially connected. The especially annular connection area surrounds a central, especially circular area, in which there is no especially material connection between the contact section and one of the two single-cell contact sections.

[0029] It is expedient that a material connection can be produced along a connection track, especially along a welding track. The connection track can extend at least partially rounded, especially circularly or spirally and / or angularly, especially polygonal, and / or, as an alternative or in addition, the connection track can extend at least partially linearly. It goes without saying that, as an alternative or in addition to the connection track, at least one connection point, especially at least one welding point, can also be provided.

[0030] In another design of the present invention, the battery single cell has an electrical battery impedance, where when an alternating current is applied at an alternating current frequency of 1 kHz to the two single-cell contact sections when the state of charge (SOC) of the battery single cell is 50% and the temperature of the battery single cell is 20 °C to 25 °C, the value of the battery single cell impedance is less than 10 mΩ (milli-ohm). Especially for the value of the battery single cell impedance, only the real part of the battery single cell impedance is considered, especially and the imaginary part is not considered. Especially when an alternating current is applied at an alternating current frequency of 1 kHz when the state of charge is 50% and the temperature is 20 °C to 25 °C, the value of the electrical battery single cell impedance is less than 5 mΩ, especially completely less than or equal to 3 mΩ.

[0031] In particular, when an alternating current is applied at an alternating current frequency of 1 kHz with the state of charge of the battery single cell being 50% and the temperature of the battery single cell being 20°C to 25°C, the value of the electrical battery single cell - impedance of the battery single cell is greater than 0.1 mΩ, in particular greater than 0.5 mΩ, in particular greater than 1 mΩ, in particular greater than 2 mΩ.

[0032] It is appropriate that the 50% state of charge can be ascertained as follows: The battery single cell can be charged to a pre - determined, in particular manufacturer - defined nominal voltage, where the nominal voltage corresponds to a 50% state of charge. As an alternative or supplement, the battery single cell can first be fully discharged or charged, and then 50% of the capacity of the battery single cell can be charged or discharged, thereby achieving and / or setting the 50% state of charge. It goes without saying that other and / or combined ascertainment methods may be appropriate.

[0033] It is appropriate that the battery single cell - impedance can be ascertained as follows: An alternating current can be applied to the battery single cell at a fixed alternating current frequency of 1 kHz, where the alternating voltage response generated by the application is measured. "Application" can be understood here as synonymous with "loading". The battery single cell - impedance, in particular its value, is obtained from the ratio of the measured alternating voltage u to the alternating current i as an alternating resistance (z = u / i).

[0034] It is appropriate that the battery single cell is a multi - tab single cell with at least one multi - tab electrode and, as an alternative or supplement, is a tab - less single cell with at least one tab - less electrode.

[0035] It is appropriate that the tab - less single cell, in particular constructed as a tab - less circular single cell, can be constructed according to US2020 / 0144676 A1. The tab - less single cell can be synonymously referred to as a "continuous - tab - single cell" with at least one continuous - tab - electrode and, as an alternative or supplement, as a "tab - less - tab - electrode single cell" with at least one tab - less - tab - electrode and, as an alternative or supplement, as a "tab - less single cell" with at least one tab - less electrode and, as an alternative or supplement, as a "continuous - tab - single cell" with at least one continuous - tab - electrode and, as an alternative or supplement, as a "full - tab - electrode single cell" with at least one full - tab - electrode.

[0036] Advantageously, a battery cell can generally have two wound electrodes which are separated from each other, in particular sandwich-like, by means of a separator of the respective battery cell. Here, for a battery cell which is not designed as a tabless cell and / or not designed as a multi-tab cell, at least one of the electrodes can have, at one of its axial ends, in particular integrally formed engagement sections (English: "tabs") which are arranged at a distance from each other and which are used to electrically connect this electrode to one of the two cell contact sections of the associated battery cell. Here, the engagement sections arranged at a distance from each other can form a constriction for the current flowing between the associated electrode and the associated cell contact section, which can cause a relatively large battery cell-impedance of such a battery cell.

[0037] Advantageously, in particular in contrast to a battery cell which is not designed as a tabless cell, a tabless cell can have at least one in particular wound tabless electrode, where the tabless electrode has, at one of its axial ends, only a single, in particular integrally formed, and alternatively or additionally helically extending, in particular over the entire extent of the tabless electrode, around the winding axis of the tabless electrode, engagement section which is used to electrically connect this tabless electrode to the associated cell contact section of the two cell contact sections. Thus, the tabless electrode does not have a plurality of engagement sections in particular.

[0038] Advantageously, in particular in contrast to the tabless electrode of a tabless cell, the multi-tab electrode of a multi-tab cell has a plurality of engagement sections which are arranged in particular directly successively one behind the other and which are each bent in the radial direction such that two adjacent engagement sections touch each other and alternatively or additionally overlap each other.

[0039] It goes without saying that a hybrid form of the battery cell can be advantageously considered, in which, for example, the two electrodes belong to different electrode types. It may even be possible to consider that each of the electrodes belongs to a different electrode type, for example if their axial ends are constructed differently.

[0040] In another design of the present invention, the electrical battery pack has a certain number of battery cells, especially those constructed in the same type. Here, the connecting device has a certain number of electrically conductive contact sections, where each contact section is directly electrically connected to one of the two cell contact sections of one of the battery cells. The contact sections are here directly electrically connected to especially the same connecting section respectively, such that the connecting section is indirectly electrically connected to one of the two cell contact sections of the battery cell by means of the contact section especially for collecting current and as an alternative or in addition for distributing current. The number of battery cells and as an alternative or in addition the number of contact sections of the connecting device can be 1. The number of battery cells and as an alternative or in addition the number of contact sections of the connecting device can be multiple. The number of battery cells can correspond to the number of contact sections of the connecting device. Preferably, the number is from 1 to 500, especially from 3 to 200. If the number is greater than 1, the connecting device can be used for the electrical connection of the battery cells.

[0041] In another design of the present invention, the battery pack has another electrically conductive connecting device, especially constructed in the same type or different types. The battery pack can thus have at least two electrically conductive connecting devices. The other electrically conductive connecting device can be constructed for guiding current to other cell contact sections of the cell contact sections of the battery cell and as an alternative or in addition for guiding current away from other cell contact sections of the cell contact sections of the battery cell. One of the connecting devices can be owned by the electrical negative path of the battery pack, and the other connecting device of the connecting devices can be owned by the electrical positive path of the battery pack.

[0042] It is suitable that at least one connecting device can define the electrical connection path of the battery pack, where the electrical connection path connects at least two battery cells of the battery pack to each other. It is suitable that the connection path can electrically connect at least two groups of battery cells to each other, especially where these groups are electrically connected in parallel or in series by means of the connection path. The battery cells belonging to one group can be electrically connected in series or in parallel within the group.

[0043] The method according to the invention is used for manufacturing, in particular at least in part, an electrical energy storage device according to the invention as described above. Thus, the advantages of the electrical energy storage device according to the invention can be fully utilized by means of the method according to the invention. The method has a step a), according to which a substantially cylindrical battery cell is provided, wherein the battery cell extends axially along the cell height direction and has two cell contact sections. Furthermore, the method has a step b), according to which a conductive contact section for a conductive connection device and a conductive connection section for the conductive connection device are provided. Furthermore, the method includes a step c), according to which an electrical connection of the contact section to one of the two cell contact sections is made. In particular, the electrical connection according to step c) is made through the contact section. In particular, due to the electrical connection according to step c), one of the two cell contact sections can be reinforced by means of the contact section, in particular in terms of thickness. If the electrical connection according to step c) is accompanied by a heat input, said reinforcement can be particularly advantageous. Furthermore, the method has a step d), according to which an electrical connection of the connection section to the contact section is made such that the contact section electrically connects the connection section to one of the two cell contact sections and indirectly mechanically connects them.

[0044] It can be expediently considered that step d) is directly carried out following step b), in particular if the connection section and the contact section are integrally formed.

[0045] It can be expediently considered that steps a) and b) can be carried out simultaneously when the contact section has been arranged on the battery cell in such a way that the contact section projects outwards from the inside of the battery cell, in particular through the cell housing of the battery cell.

[0046] It is expedient that, if the contact section is owned by a component for the energy storage device (which also has a displacement section), the connection section can first be positioned on the displacement section. The connection section can then be directly and, as an alternative or in addition, materially connected to the displacement section. When the connection section is directly and, as an alternative or in addition, materially connected to the displacement section, the displacement section together with the connection section fixed thereto can be displaced onto the contact section and, as an alternative or in addition, bent onto the contact section, such that the connection section is arranged, in particular along the cell height direction, between the displacement section and the contact section. Then, in particular, the connection section can be directly and, as an alternative or in addition, materially connected to the contact section through the displacement section. Here, the contact section can already be electrically connected to one of the two cell contact sections beforehand or can be electrically connected to one of the two cell contact sections subsequently.

[0047] In the design of the present invention, the electrical connection according to step c) of the method and, as an alternative or addition, the electrical connection material according to step d) of the method are carried out in cooperation, in particular by soldering without soldering additives, in particular by laser soldering or by resistance soldering. As an alternative or addition, the electrical connection according to step c) and, as an alternative or addition, the electrical connection according to step d) can be carried out by means of Klett soldering and, as an alternative or addition, by means of screws and, as an alternative or addition, by means of snap elements and, as an alternative or addition, by means of rivets and, as an alternative or addition, by means of brazing and, as an alternative or addition, by means of bonding and, as an alternative or addition, by means of press fitting, in particular by means of one of the two single-cell contact sections and, as an alternative or addition, by means of cutting contacts provided on the contact section.

[0048] In another design of the present invention, steps a) and b) of the method are carried out temporally before steps c) and d), where step c) is carried out temporally before step d) or simultaneously with step d). As an alternative or addition, steps a) to d) are carried out for a certain number of battery cells for a battery pack and a certain number of contact devices for electrically contacting one of the two single-cell contact sections of each battery cell in the battery pack, in particular for each connecting device and, as an alternative or addition, multiple times.

[0049] It is appropriate that steps a) and b) can be carried out multiple times before step c) is carried out multiple times. In particular, step c) can either be carried out multiple times before step d) is carried out multiple times or can be carried out multiple times simultaneously with step d). However, as an alternative or addition, it is also possible to consider carrying out steps a) to d) iteratively and cyclically multiple times. In particular, steps a) to d) can be carried out first for one of the connecting devices and then for the other connecting device or simultaneously for both connecting devices.

[0050] The electrical battery system according to the present invention has an electrical battery pack according to the present invention as described above. In particular, the electrical battery pack of the electrical battery system is at least partially manufactured by means of the method according to the present invention described above. In addition, the electrical battery system has an electrical battery device having a receiving device for removably receiving the battery pack and for electrically connecting the battery pack to the battery device accordingly.

[0051] In the design of the present invention, the electrical battery device is an electrical processing device that can be powered by the received battery pack. As an alternative or addition, the electrical battery device is an electrical charging device for charging the received battery pack.

[0052] Advantageously, the battery device configured as a processing device is floor-guided and / or manually guided, in particular hand-held and / or carried on the back, processing device and / or a gardening device, forestry device, soil processing device and / or construction processing device. The processing device can be configured to be manually operable, that is to say, in particular, the processing direction of the processing device can be aligned by the hand of the user operating the processing device relative to the workpiece being processed by means of the processing device at present. In particular, the processing device can be a saw, in particular a chain saw or a pole pruner or a hedge trimmer or a hedge cutter or a tree cutter or a gardening pole shear, a cutting machine or a blowing device or a leaf blower or a suction device or a leaf vacuum or a cleaning device or a high-pressure cleaner or a sweeping device or a sweeping roller or a sweeping brush or a lawn mower or a lawn trimmer or a free cutter or a cultivator. As a supplementary or alternative solution, the processing device can have a processing tool and / or in particular an electric drive motor, in particular for driving the processing tool. Electrical energy from a battery pack can be supplied to the drive motor, in particular in order to provide the drive power for the processing tool.

[0053] Advantageously, the battery device configured as a charging device has an electrical connector for electrical connection to an electrical energy source, such as a power grid. The charging device can be used to charge the accommodated battery pack with electrical energy from an energy source. The charging device can have an electronic charging regulator.

[0054] It goes without saying that the battery device configured as a processing device can have an electrical connector for electrical connection to an electrical energy source, such as a power grid, in order to charge the battery pack with electrical energy from the electrical energy source. In this regard, the battery device can be configured with a dual function as a processing device and a charging device. Description of the Drawings

[0055] Other advantages and features of the present invention result from the claims and from the following description of preferred embodiments of the present invention, which are illustrated by means of the drawings. Here, the same reference numerals relate to the same or similar or functionally identical components.

[0056] It goes without saying that the features mentioned above and to be explained below can be used not only in the combinations described accordingly, but also in other combinations or individually, without departing from the scope of the present invention.

[0057] Figure 1 An embodiment of an electrical battery pack according to the present invention is shown in a schematic side view,

[0058] Figure 2 Shows according to Figure 1 Details of the side view of

[0059] Figure 3Another embodiment of an electrical battery pack according to the invention is shown in a schematic side view,

[0060] Figure 4 Another embodiment of a battery pack according to the invention is shown in a schematic side view,

[0061] Figure 5 Another embodiment of an electrical battery pack according to the invention is shown in a schematic top view,

[0062] Figure 6 A schematic flow chart showing an embodiment for implementing the method according to the invention, the method being for manufacturing an electrical battery pack according to the invention, in particular in accordance with Figures 1 to 5 the invention,

[0063] Figure 7 Another embodiment of an electrical battery pack according to the invention is shown in a schematic side view,

[0064] Figure 8 An electrical battery device for an electrical battery system according to the invention, constructed as an electrical charging device, is shown in a schematic perspective view, and

[0065] Figure 9 A schematic side view shows an embodiment of an electrical battery system having an electrical battery device constructed as an electrical machining device and having a battery pack in accordance with Figure 7 the invention. Detailed Description

[0066] The electrical battery pack 1 is provided for the battery system 100. The electrical battery pack 1 is thus configured, for example, for use in the battery system 100.

[0067] The electrical battery system 100 has an electrical battery pack 1. In addition, the battery system 100 has an electrical battery device 50. The electrical battery device 50 has a receiving device 51 which is configured for removably receiving the battery pack 1 and for electrically connecting the battery pack 1 to the battery device 50, in particular releasably. The electrical battery device 50 is configured, for example, as an electrical machining device 52 (shown in Figure 9 which can be supplied with electrical energy by means of the received battery pack 1. As an alternative or in addition, the electrical battery device 50 is configured as an electrical charging device 53 (shown in Figure 8 for charging the received battery pack 1.

[0068] In Figure 9The electric processing device 52 shown is an electric motor chain saw. The processing device 52 has, for example, a processing tool currently in the form of a saw chain. As an alternative or in addition, the processing device 52 can have an electric drive motor, in particular, which can be used to drive the processing tool. For example, electrical energy from the accommodated battery pack 1 can be supplied to the drive motor to provide the drive power for the processing tool.

[0069] The battery device 50 configured as a charging device 53 has, for example, an electrical connector for electrically connecting to an electrical energy source, for example, in the form of a power grid. The charging device 53 is used, for example, to charge the accommodated battery pack 1 with electrical energy from the energy source. The charging device 53 can have an electronic charging regulator.

[0070] It goes without saying that the battery device 50 configured as a processing device 52 can have an electrical connector (not shown here) for electrically connecting to an electrical energy source, for example, in the form of a power grid, in order to charge the accommodated battery pack 1 with electrical energy from the electrical energy source. In this regard, the battery device 50 can be configured with a dual function as a processing device 52 and a charging device 53.

[0071] The battery pack 1 has at least one substantially cylindrical electrical battery cell 2. The battery cell 2 extends axially along the cell height direction Z. Here, the battery cell 2 has two electrical cell contact sections 3, 3A, 3B. When the battery cell 2 is charged with electrical energy, these two cell contact sections 3, 3A, 3B are oppositely polarized. Currently, the battery cell 2 is configured as a substantially cylindrical battery cell 2, that is, configured as a battery-round cell.

[0072] Currently, the battery cell 2 has a cell height measured along the cell height direction Z. In addition, the battery cell 2 has, for example, a cell diameter measured perpendicular to the cell height, that is, radially. The cell diameter can be 10 mm to 30 mm. As an alternative or in addition, the cell height can be 40 mm to 78 mm.

[0073] The battery pack 1 also has at least one electrically conductive connecting device 30, 30A, 30B. The connecting devices 30, 30A, 30B are used to conduct current to and, as an alternative or in addition, conduct current away from one of the two cell contact sections 3, 3A, 3B. In view of Figures 1 to 4, the connecting devices 30, 30A can be used to conduct current to the single-cell contact sections 3, 3A, while the other connecting device 30, 30B is used to conduct current away from the other one of the two single-cell contact sections 3, 3B, especially when discharging the battery pack 1 in these two cases. When the battery pack 1 is charged, the current can be conducted in the opposite direction.

[0074] The electrically conductive connecting devices 30, 30A, 30B have electrically conductive contact sections 4, 4A, 4B. The contact sections 4, 4A, 4B are used for electrical contact with one of the two single-cell contact sections 3, 3A, 3B. Here, the contact sections 4, 4A, 4B are electrically connected to and directly mechanically connected to one of the two single-cell contact sections 3, 3A, 3B. The contact sections 4, 4A, 4B can thus touch the relevant single-cell contact sections 3, 3A, 3B.

[0075] The connecting devices 30, 30A, 30B have electrically conductive connecting sections 5, 5A, 5B. The electrically conductive connecting sections 5, 5A, 5B are used to conduct current to the contact sections 4, 4A, 4B and, as an alternative or in addition, conduct current away from the contact sections 4, 4A, 4B. In view of Figures 1 to 4 , the connecting section 5, 5A can be used to conduct current to the contact sections 4, 4A, while the other connecting section 5, 5B is used to conduct current away from the other contact section 4, 4B, especially when discharging the battery pack 1. The contact sections 4, 4A, 4B electrically connect and indirectly mechanically connect the connecting sections 5, 5A, 5B to one of the two single-cell contact sections 3, 3A, 3B. Thus, in particular, the corresponding connecting sections 5, 5A, 5B are electrically connected and indirectly mechanically connected through the corresponding contact sections 4, 4A, 4B.

[0076] The contact sections 4, 4A, 4B have a contact section thickness 7. The connecting sections 5, 5A, 5B have a connecting section thickness 8. For example, the connecting sections 5, 5A, 5B have the connecting section thickness 8 especially at least or only beside the contact sections 4, 4A, 4B. As an alternative or in addition, the connecting sections 5, 5A, 5B can have the connecting section thickness 8 at the contact sections 4, 4A, 4B, that is, especially in the region where the connecting sections 5, 5A, 5B touch the contact sections 4, 4A, 4B. The contact section thickness 7 is less than the connecting section thickness 8.

[0077] For example, the connecting sections 5, 5A, 5B are only indirectly electrically connected to one of the two single-cell contact sections 3, 3A, 3B by means of the contact sections 4, 4A, 4B. The contact sections 4, 4A, 4B can basically only be present in the following regions of the connecting devices 30, 30A, 30B, in which regions the connecting devices 30, 30A, 30B are in electrical contact with, in particular directly touch, one of the two single-cell contact sections 3, 3A, 3B.

[0078] The contact sections 4, 4A, 4B can taper and / or become thinner in terms of thickness relative to the connecting sections 5, 5A, 5B.

[0079] The two single-cell contact sections 3, 3A, 3B of the battery single cell 2 can be arranged opposite to each other along the single-cell height direction Z and, as an alternative or in addition, can be arranged on the end sides. Currently, the two single-cell contact sections 3, 3A, 3B are arranged opposite to each other along the single-cell height direction Z and are respectively arranged on the end sides. As an alternative or in addition, the two single-cell contact sections 3, 3A, 3B of the battery single cell 2 can be arranged perpendicular to the single-cell height direction Z, in particular radially offset from each other.

[0080] At least one of the two single-cell contact sections 3, 3A, 3B, currently each of the single-cell contact sections, has, for example, a single-cell contact section thickness 6. The single-cell contact section thickness 6 is, for example, from 0.05 mm to 0.4 mm, currently from 0.15 mm to 0.3 mm. As an alternative or in addition, the contact section thickness 7 is from 0.05 mm to 0.4 mm, currently from 0.15 mm to 0.3 mm. The single-cell contact section thickness 6 can be the same as the contact section thickness 7.

[0081] The connecting sections 5, 5A, 5B can have a connecting section thickness 8. The connecting section thickness 8 can be from 0.4 mm to 1.0 mm. Currently, the connecting section thickness 8 is from 0.5 mm to 0.7 mm.

[0082] For example, the connecting section thickness 8 corresponds to 1.5 to 5 times the single-cell contact section thickness 6. As an alternative or in addition, the connecting section thickness 8 can correspond to 1.5 to 5 times the contact section thickness 7.

[0083] The connecting sections 5, 5A, 5B can be formed in multiple layers, in particular where the connecting section thickness 8 can include multiple layers of the connecting sections 5, 5A, 5B, in particular all of the layers.

[0084] One of the two single-cell contact sections 3, 3A, 3B is connected, for example, in a material-mating manner with the contact sections 4, 4A, 4B. As an alternative or in addition, one of the two single-cell contact sections 3, 3A, 3B can be connected in a form-fitting manner with the contact sections 4, 4A, 4B and, as an alternative or in addition, in a force-fitting manner. Currently, one of the two single-cell contact sections 3, 3A, 3B is welded to the contact sections 4, 4A, 4B, for example, without welding additives. One of the two single-cell contact sections 3, 3A, 3B can be connected to the contact sections 4, 4A, 4B by means of laser welding and / or by means of resistance welding.

[0085] As an alternative or in addition, one of the two single-cell contact sections 3, 3A, 3B can be connected by means of Klett welding. As an alternative or in addition, one of the two single-cell contact sections 3, 3A, 3B can be connected to the contact sections 4, 4A, 4B by means of screws. As an alternative or in addition, one of the two single-cell contact sections 3, 3A, 3B can be connected to the contact sections 4, 4A, 4B by means of a snap-in part. As an alternative or in addition, one of the two single-cell contact sections 3, 3A, 3B can be connected to the contact sections 4, 4A, 4B by means of rivets. As an alternative or in addition, one of the two single-cell contact sections 3, 3A, 3B can be connected to the contact sections 4, 4A, 4B by means of brazing. As an alternative or in addition, one of the two single-cell contact sections 3, 3A, 3B can be connected to the contact sections 4, 4A, 4B by means of adhesion. As an alternative or in addition, one of the two single-cell contact sections 3, 3A, 3B can be connected to the contact sections 4, 4A, 4B by means of a press fit. In order to connect one of the two single-cell contact sections 3, 3A, 3B to the contact sections 4, 4A, 4B, at least one cutting contact can be provided on one of the two single-cell contact sections 3, 3A, 3B and / or on the contact sections 4, 4A, 4B.

[0086] In Figure 1 、 3 and in the illustration of 4, empty triangles can be seen, and these empty triangles should indicate the corresponding connections of the contact sections 4, 4A, 4B to the single-cell contact sections 3, 3A, 3B and / or should indicate the corresponding connections of the connecting sections 5, 5A, 5B to the contact sections 4, 4A, 4B. The triangles can visually illustrate the laser beam focused on the corresponding welding area for connection, and the laser beam is used for laser welding.

[0087] One of the two single-cell contact sections 3, 3A, 3B, for example, has a nickel-plated steel sheet material. The contact sections 4, 4A, 4B can have a nickel-plated steel sheet material and, as an alternative or in addition, can have a copper sheet material. As an alternative or in addition, the connecting sections 5, 5A, 5B have a copper sheet material.

[0088] The copper material can be pure copper (Cu). The copper plate material can be a copper alloy having at least 98 mass percent copper (Cu) or be composed of such a copper alloy. The steel plate material can correspond to the standard designation "CC01".

[0089] The two single-cell contact sections 3, 3A, 3B can be constructed in the same or different types.

[0090] For example, the contact sections 4, 4A, 4B are arranged sandwich-like directly, in particular protruding or non-protruding, between one of the two single-cell contact sections 3, 3A, 3B and the connection sections 5, 5A, 5B. As an alternative or addition, the connection sections 5, 5A, 5B are arranged offset, in particular protruding, relative to one of the two single-cell contact sections 3, 3A, 3B transversely to the single-cell height direction Z.

[0091] For example, the contact sections 4, 4A, 4B are completely incorporated into the connection sections 5, 5A, 5B, see Figure 1 the lower part. As an alternative or addition, the contact sections 4, 4A, 4B can be completely incorporated into one of the single-cell contact sections 3, 3A, 3B.

[0092] The connection sections 5, 5A, 5B can be displaced and / or bent onto the contact sections 4, 4A, 4B, as especially outlined in dashed lines in Figure 3 and 4 For example, the contact sections 4, 4A, 4B are owned by the component 20 of the battery pack 1. The component 20 can be constructed differently, in particular separately, from the connection sections 5, 5A, 5B and as an alternative or addition from one of the two single-cell contact sections 3, 3A, 3B. The component 20 has, for example, a displacement section 9 that is different from the contact sections 4, 4A, 4B and is in particular completely incorporated into the contact sections 4, 4A, 4B. Here, the displacement section 9 can be displaced together with the connection sections 5, 5A, 5B such that the connection sections 5, 5A, 5B are arranged between the displacement section 9 and the contact sections 4, 4A, 4B. Here, the connection sections 5, 5A, 5B can be connected directly and / or materially cooperatively to the displacement section 9 and to the contact sections 4, 4A, 4B respectively.

[0093] As especially according to Figure 5It can be seen that one of the two single-cell contact sections 3, 3A, 3B can have a connection area 11, for example, in the shape of a circular ring. Here, the contact sections 4, 4A, 4B are directly and / or materially connected to only one of the two single-cell contact sections 3, 3A, 3B within the connection area 11. The material connection can be produced along a connection track, in particular along a welding track. The connection track can extend at least partially in a rounded manner, especially circularly or spirally. As an alternative or addition, the connection track can extend at least partially angularly, especially polygonal. As an alternative or addition, it can be considered that the connection track extends at least partially linearly. It goes without saying that as an alternative or addition to the connection track, a connection point, especially multiple connection points, can also be provided.

[0094] For example, the battery single cell 2 has an electrical battery single cell impedance. Here, when an alternating current is applied at an alternating current frequency of 1 kHz to the two single-cell contact sections 3, 3A, 3B of the battery single cell 2 with a state of charge of 50% of the battery single cell 2 and a temperature of 20°C to 25°C of the battery single cell 2, the value of the battery single cell impedance is less than 10 mΩ.

[0095] The battery single cell 2 is, for example, configured as a multi-tab single cell having at least one multi-tab electrode and, as an alternative or addition, as a tabless single cell 12 configured as currently having at least one tabless electrode 13. For example, the tabless electrode 13 is wound. The tabless electrode 13 can have only a single, in particular integral, and / or a joint section (English: “tab”) extending around the winding axis of the tabless electrode 13 over the entire extent of the tabless electrode 13 at at least one of its axial ends, which joint section is used for electrically connecting the tabless electrode 13 to the respective single-cell contact section of the two single-cell contact sections 3, 3A, 3B. Thus, the tabless electrode 13 currently does not have multiple joint sections. Different from the tabless single cell 12, the multi-tab electrode of the multi-tab single cell can have multiple, in particular directly successively arranged, joint sections, which joint sections are bent especially radially such that two adjacent joint sections touch and / or overlap each other. It goes without saying that a hybrid form of the battery single cell 2 can be envisaged.

[0096] The value of the electrical battery single cell impedance can be greater than 0.1 mΩ, in particular greater than 0.5 mΩ, in particular greater than 1 mΩ, in particular greater than 2 mΩ. As an alternative or addition, the value of the electrical battery single cell impedance can be less than 5 mΩ, especially completely less than or equal to 3 mΩ.

[0097] The electrical accumulator battery 1 has, for example, a certain number of accumulator cells 2, which are constructed in particular in the same type. Here, the connecting devices 30, 30A, 30B can have a certain number of electrically conductive contact sections 4, 4A, 4B, which are each directly electrically connected to one of the two cell contact sections 3, 3A, 3B of one of the accumulator cells 2. The contact sections 4, 4A, 4B can be directly electrically connected to in particular the same connecting section 5, 5A, 5B respectively, such that the connecting sections 5, 5A, 5B are indirectly electrically connected to one of the two cell contact sections 3, 3A, 3B of the accumulator cell 2 by means of the contact sections 4, 4A, 4B.

[0098] The number of accumulator cells 2 and / or the number of contact sections 4, 4A, 4B of the connecting devices 30, 30A, 30B can be 1. The number of accumulator cells 2 and / or the number of contact sections 4, 4A, 4B of the connecting devices 30, 30A, 30B can be a plurality. The number of accumulator cells 2 can correspond to the number of contact sections 4, 4A, 4B of the connecting devices 30, 30A, 30B. For example, the number is from 1 to 500, in particular from 3 to 200. In particular, all of the accumulator cells 2 in the accumulator battery are constructed in the same type, that is to say, in particular all of the accumulator cells 2 can be of the same type.

[0099] The accumulator battery 1 can have two connecting devices 30, 30A, 30B, that is to say, as currently, one of the connecting devices 30, 30A and the other connecting device 30, 30B. The connecting device 30, 30A can be constructed for guiding current to one of the two cell contact sections 3, 3A of the accumulator cell 2. In contrast, the other connecting device 30, 30B can be used for guiding current away from the other of the two cell contact sections 3, 3B of the accumulator cell 2.

[0100] According to Figures 1 to 4 , the connecting device 30, 30A is, for example, constructed differently from the other connecting device 30, 30B. It goes without saying, however, that the connecting device 30, 30A can also be constructed in the same way as the other connecting device 30, 30B. It goes without saying that the exemplary connecting devices 30, 30A, 30B in Figures 1 to 4 can be combined appropriately in other embodiments.

[0101] In Figure 7 the outer housing of the accumulator battery 1 can be seen, by means of which the internal structure of the accumulator battery 1 can be enclosed. The internal structure of the accumulator battery 1 according to Figure 7 is realized, for example, as exemplarily shown in Figures 1 to 4 . In other words: In particular Figures 1 to 4In particular, only the interior of the battery pack 1 is shown without the housing of the battery pack 1 .

[0102] The electrical battery pack 1 can be manufactured, in particular at least partially, by means of method V. Method V has a step a), according to which at least one essentially cylindrical battery cell 2 is provided, wherein the battery cell 2 extends axially along the cell height direction Z and has two cell contact sections 3, 3A, 3B. Furthermore, method V has a step b), according to which an electrically conductive contact section 4, 4A, 4B is provided for an electrically conductive connection device 30, 30A, 30B. Furthermore, according to step b), an electrically conductive connection section 5, 5A, 5B is provided for the electrically conductive connection device 30, 30A, 30B. In other words: according to step b), the electrically conductive connection device 30, 30A, 30B can be provided, in particular in a single-piece form. Furthermore, method V has a step c), according to which the contact section 4, 4A, 4B is electrically connected to one of the two cell contact sections 3, 3A, 3B. Furthermore, method V has a step d), according to which the connecting section 5 , 5A, 5B is electrically connected to the contacting section 4 , 4A, 4B, so that the contacting section 4 , 4A, 4B connects the connecting section 5 , 5A, 5B electrically and indirectly mechanically to one of the two cell contacting sections 3 , 3A, 3B.

[0103] As exemplified in Figure 3 As indicated by the dashed lines in the figure, the connecting section 5, 5B can be positioned at the displacement section 9. The connecting section 5, 5B can then be connected directly and / or materially to the displacement section 9. If the connecting section 5, 5B is connected directly and / or materially to the displacement section 9, the displacement section 9 together with the connecting section 5, 5B fixed thereto can be displaced and / or bent onto the contact section 4, 4B, so that the connecting section 5, 5B is arranged, for example, along the cell height direction Z between the displacement section 9 and the contact section 4, 4B. The connecting section 5, 5B can then be connected directly and / or materially to the contact section 4, 4B, for example, through the displacement section 9. In this case, the contact section 4, 4B can already be electrically connected to one of the two cell contact sections 3, 3B in advance or can be electrically connected to one of the two cell contact sections 3, 3A later.

[0104] For example, the electrical connection according to step c) and / or according to step d) is carried out in a materially bonded manner. The materially bonded connection according to step c) and / or according to step d) can be carried out, for example, by welding without welding additives. Currently, the electrical connection according to step c) and / or according to step d) is carried out by laser welding and / or by resistance welding.

[0105] For example, steps a) and b) of method V are carried out in time before steps c) and d). Here, step c) can be carried out in time before step d) or simultaneously with step d).

[0106] Steps a) to d) of method V can be carried out multiple times. For example, steps a) to d) can be carried out once or multiple times for each connecting device 30, 30A, 30B. Steps a) to d) can be carried out for a certain number of battery cells 2 of the battery pack 1, in particular for each connecting device 30, 30A, 30B and / or multiple times. In addition, steps a) to d) can be carried out for a certain number of contact devices 4, 4A, 4B for making electrical contact with one of the two single-cell contact sections 3, 3A, 3B for respectively one battery cell of the battery cells 2, in particular for each connecting device 30, 30A, 30B and / or multiple times.

[0107] For example, steps a) and b) can be carried out multiple times before step c) is carried out multiple times. In particular, step c) can be carried out multiple times before step d) is carried out multiple times or step c) can be carried out multiple times simultaneously with step d). However, as an alternative or supplement, it can also be considered to carry out steps a) to d) iteratively and cyclically multiple times in succession. In particular, steps a) to d) can be carried out first for one connecting device 30, 30A, 30B and then for another connecting device or simultaneously for two connecting devices 30, 30A, 30B.

Claims

1. An electrical storage battery pack (1) for an electrical storage battery system (100), wherein: The electrical storage battery pack (1) comprises: at least one essentially cylindrical electrical battery cell (2) which extends axially in the cell height direction (Z) and which has two cell contact sections (3, 3A, 3B), wherein the two cell contact sections (3, 3A, 3B) are polarized in opposite directions when the battery cell (2) is charged with electrical energy, at least one electrically conductive connection device (30, 30A, 30B) for conducting an electric current to one of the two cell contact sections (3, 3A, 3B) and / or away from one of the two cell contact sections (3, 3A, 3B), wherein the connection device (30, 30A, 30B) comprises: - an electrically conductive contact section (4, 4A, 4B) for electrically contacting one of the two cell contact sections (3, 3A, 3B), wherein the contact section (4, 4A, 4B) is electrically and directly mechanically connected to one of the two cell contact sections (3, 3A, 3B), and - an electrically conductive connecting section (5, 5A, 5B) for conducting an electric current to the contact section (4, 4A, 4B) and / or conducting an electric current away from the contact section (4, 4A, 4B), wherein the contact section (4, 4A, 4B) connects the connecting section (5, 5A, 5B) is electrically and indirectly mechanically connected to one of the two cell contact sections (3, 3A, 3B); - wherein the contact section (4, 4A, 4B) has a contact section thickness (7), - wherein the connecting section (5, 5A, 5B) has a connecting section thickness (8), - wherein the contact section thickness (7) is smaller than the connecting section thickness (8).

2. The electrical storage battery (1) according to the preceding claim, wherein the two cell contact sections (3, 3A, 3B) of the battery cell (2) are arranged opposite one another along the cell height direction (Z) and / or on the end sides, and / or -in, The two cell contact sections (3, 3A, 3B) of the battery cell (2) are arranged perpendicularly to the cell height direction (Z), in particular radially offset from one another.

3. An electrical storage battery (1) according to any one of the preceding claims, wherein: One of the two cell contact sections (3, 3A, 3B) has a cell contact section thickness (6) of 0.05 mm to 0.4 mm, in particular 0.15 mm to 0.3 mm, and / or wherein the contact section thickness (7) is 0.05 mm to 0.4 mm, in particular 0.15 mm to 0.3 mm, and / or wherein the connecting section (5, 5A, 5B) has a connecting section thickness (8) of 0.4 mm to 1.0 mm, in particular 0.5 mm to 0.7 mm.

4. An electrical storage battery (1) according to any one of the preceding claims, wherein: One of the two cell contact sections (3, 3A, 3B) is connected to the contact section (4, 4A, 4B) in a materially and / or form-fitting and / or force-fitting manner, - Especially among them, One of the two cell contact sections (3, 3A, 3B) is welded to the contact section (4, 4A, 4B), in particular by means of laser welding or by means of resistance welding, in particular without welding additives.

5. The electrical storage battery (1) according to any one of the preceding claims, wherein: One of the two cell contact sections (3, 3A, 3B) comprises a nickel-plated steel sheet material; and / or wherein the contact section (4, 4A, 4B) comprises a nickel-plated steel sheet material and / or a copper sheet material; and / or - wherein the connecting section (5, 5A, 5B) comprises a copper sheet material.

6. An electrical storage battery (1) according to any one of the preceding claims, - wherein: The contact section (4, 4A, 4B) is arranged directly, in particular protruding or without protrusion, between one of the two cell contact sections (3, 3A, 3B) and the connecting section (5, 5A, 5B) in a sandwich-like manner; and / or -in, The connecting section (5, 5A, 5B) is arranged transversely to the cell height direction (Z) offset from one of the two cell contact sections (3, 3A, 3B), in particular projecting.

7. An electrical storage battery (1) according to any one of the preceding claims, - wherein: The contact section (4, 4A, 4B) is completely transferred into the connecting section (5, 5A, 5B) and / or is completely transferred into one of the cell contact sections (3, 3A, 3B); and / or - wherein the connecting section (5, 5A, 5B) is displaced and / or bent onto the contact section (4, 4A, 4B).

8. An electrical storage battery (1) according to any one of claims 1 to 6, - wherein: The contact section (4, 4A, 4B) is possessed by a component (20) of the battery pack (1), which component (20) is designed differently, in particular separately, from the connecting section (5, 5A, 5B) and / or from one of the cell contact sections (3, 3A, 3B).

9. The electrical storage battery (1) according to the preceding claim, -in, The component (20) has a displacement section (9) which is different from the contact section (4, 4A, 4B) and which is in particular completely integrated into the contact section (4, 4A, 4B), wherein: - The displacement section (9) is displaced together with the connecting section (5, 5A, 5B) in such a way that the connecting section (5, 5A, 5B) is arranged between the displacement section (9) and the contact section (4, 4A, 4B), in particular wherein the connecting section (5, 5A, 5B) is respectively directly and / or materially connected to the displacement section (9) and to the contact section (4, 4A, 4B).

10. The electrical storage battery (1) according to any one of the preceding claims, wherein: One of the two cell contact sections (3, 3A, 3B) has a connection region (11), in particular annular in shape, -in, The contact section (4, 4A, 4B) is directly and / or materially connected to one of the two cell contact sections (3, 3A, 3B) only within the connection region (11).

11. The electrical storage battery (1) according to any one of the preceding claims, wherein: The battery cell (2) has an electrical battery cell impedance, wherein the value of the battery cell impedance is less than 10 mΩ when an alternating current is applied to the two cell contact sections (3, 3A, 3B) at an alternating current frequency of 1 kHz when the battery cell (2) has a state of charge of 50% and a temperature of the battery cell (2) of 20° C. to 25° C.; and / or - wherein the battery cell (2) is a multi-tab cell having at least one multi-tab electrode and / or a tabless cell (12) having at least one tabless electrode (13).

12. An electrical storage battery (1) according to any one of the preceding claims, - wherein: The electrical battery pack (1) has a number of battery cells (2) which are in particular designed in the same way. wherein the connecting device (30, 30A, 30B) has a number of electrically conductive contact sections (4, 4A, 4B), each of which is directly electrically connected to one of the two cell contact sections (3, 3A, 3B) of one of the battery cells (2), - wherein the contact sections (4, 4A, 4B) are respectively directly electrically connected to, in particular, the same connecting section (5, 5A, 5B), so that the connecting section (5, 5A, 5B) is indirectly electrically connected to one of the two cell contact sections (3, 3A, 3B) of the battery cell (2) by means of the contact section (4, 4A, 4B), in particular for current collection and / or current distribution.

13. The electrical storage battery (1) according to the preceding claim, - wherein the battery pack (1) has a further electrically conductive connecting device (30, 30A, 30B), in particular of the same or different type, for conducting current to other of the cell contact sections (3, 3A, 3B) of the battery cells (2) and / or away from other of the cell contact sections (3, 3A, 3B) of the battery cells (2).

14. Method (V) for producing an electrical storage battery (1) according to any one of the preceding claims, wherein: The method (V) comprises the following steps: a) providing a substantially cylindrical battery cell (2) which extends axially in the cell height direction (Z) and has two cell contact sections (3, 3A, 3B); b) providing an electrically conductive contact section (4, 4A, 4B) for the electrically conductive connecting device (30, 30A, 30B) and an electrically conductive connecting section (5, 5A, 5B) for the electrically conductive connecting device (30, 30A, 30B); c) electrically connecting the contact section (4, 4A, 4B) to one of the two cell contact sections (3, 3A, 3B); and d) electrically connecting the connecting section (5, 5A, 5B) to the contact section (4, 4A, 4B), so that the contact section (4, 4A, 4B) electrically and indirectly mechanically connects the connecting section (5, 5A, 5B) to one of the two cell contact sections (3, 3A, 3B).

15. Method (V) according to the preceding claim, wherein the electrical connection according to step c) and / or according to step d) is carried out in a materially bonded manner, in particular by welding, in particular without welding additives, in particular by laser welding or by resistance welding.

16. Method (V) according to any of the two preceding claims, - wherein steps a) and b) of method (V) are carried out before steps c) and d), wherein step c) is carried out before or simultaneously with step d); and / or -in: - a certain number of battery cells (2) for a battery pack (1), a number of contact devices (4, 4A, 4B) for making electrical contact with one of the two cell contact sections (3, 3A, 3B) of each of the battery cells (2), In particular, steps a) to d) are carried out for each connecting device (30, 30A, 30B) and / or a plurality of times.

17. An electrical storage battery system (100) comprising: - an electrical storage battery (1) according to any one of claims 1 to 13, which is produced in particular by means of a method (V) according to any one of the three preceding claims, An electrical storage battery device (50) having a receiving device (51) for replaceably receiving the storage battery pack (1) and for electrically connecting the storage battery pack therewith.

18. The electrical battery system (100) according to the preceding claim, wherein the electrical storage battery device (50) is an electrical processing device (52) which can be supplied with electrical energy by means of the stored storage battery pack (1) and / or an electrical charging device (53) for charging the stored storage battery pack (1).

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