Battery cell device

Abstract

A battery cell arrangement (110) comprising: a plurality of cylindrical battery cells (120, 122); a negative busbar plate (130) arranged to be supported on a top surface (122a) of the plurality of cylindrical battery cells (120, 122); and a positive bus plate (140) arranged to be electrically isolated from and supported on the negative bus plate (130), the positive bus plate (140) comprising a plurality of positive bus terminals (144, 144a) and the negative bus plate (130) comprising a plurality of first openings (132, 132a), where the positive bus plate (140) comprises a plurality of second openings (146, 146a), and where the positive bus terminals (144, 144a) are electrically isolated from and supported on the negative bus plate (130). Each of the plurality of cylindrical battery cells (120, 122) is arranged in contact with a corresponding positive terminal (124) of the plurality of cylindrical battery cells (120, 122), and each of the plurality of cylindrical battery cells (120, 122) is arranged in contact with the negative bus plate (130) at an associated second opening (146, 146a) of the positive bus plate (140).

Description

Technical Field

[0001] The present disclosure generally relates to batteries or battery packs. In particular aspects, the present disclosure relates to battery cell devices. The present disclosure may be applicable to heavy vehicles such as trucks, buses, and construction equipment, as well as other vehicle types (including ships). Although the present disclosure may be described with respect to specific vehicles, the present disclosure is not limited to any particular vehicle. Background Art

[0002] Vehicles generally include an engine for propelling the vehicle. The engine can be powered in various ways, such as by burning a liquid or gaseous fuel in a combustion engine or an internal combustion engine. Alternatively, the vehicle can be propelled by electric power in an electric motor. In addition, there are hybrid solutions where the vehicle is propelled by both an internal combustion engine and an electric motor. In either case, an energy storage device is used to store the energy required to propel the vehicle. The energy storage device can also be used to power auxiliary loads in the vehicle.

[0003] For many vehicles, the energy storage device is included in an energy storage system, where the energy storage system is configured to power the electric motor used to propel the vehicle and any auxiliary loads. For example, for an electric vehicle, the energy storage device can be a battery or a battery pack configured to operate the electric motor and electric auxiliary devices. The electric motor and / or electric auxiliary devices are typically referred to as loads. Several batteries or several connected and / or paralleled battery cells can be grouped into a battery pack. The battery pack needs to be charged regularly and then electrically connected to an electrical energy source, for example, via a plug directly connected to the power grid or through an on-vehicle charger. Such chargers are typically referred to as power sources.

[0004] In many applications, multiple battery cells in a battery pack are electrically connected to each other through inter-cell busbars (usually a positive busbar and a negative busbar). However, these inter-cell busbars occupy a large amount of space in the battery pack. In addition, due to limited space requirements, the electrical connections to and from the inter-cell busbars can be a challenge. Therefore, there is a need in the industry for an improved battery cell device. Summary of the Invention

[0005] According to a first aspect of the present disclosure, a battery cell device is provided. The battery cell device includes: a plurality of cylindrical battery cells, each of the cylindrical battery cells having a top surface that includes a positive electrode terminal disposed centrally and a negative electrode terminal disposed circumferentially around the positive electrode terminal; a negative busbar plate disposed to support on the top surfaces of the plurality of cylindrical battery cells, and a positive busbar plate disposed to be electrically isolated from and support on the negative busbar plate, the positive busbar plate including a plurality of positive busbar terminals aligned with the positive electrode terminals of the plurality of cylindrical battery cells, and the negative busbar plate including a plurality of first openings aligned with the plurality of positive busbar terminals; wherein the positive busbar plate includes a plurality of second openings aligned with the negative electrode terminals of the plurality of cylindrical battery cells, and wherein each of the positive busbar terminals is disposed to contact a corresponding positive electrode terminal of the plurality of cylindrical battery cells, and each of the negative electrode terminals of the plurality of cylindrical battery cells is disposed to contact the negative busbar plate at an associated second opening of the positive busbar plate. The first aspect of the present disclosure may seek to overcome the problem of inefficient and / or cumbersome busbar arrangements between cells. That is, through the first aspect, and particularly due to the positive busbar plate and the negative busbar plate, the arrangement of the plurality of cylindrical battery cells is improved. Further, through the arrangement of the cylindrical battery cells and the positive busbar plate and the negative busbar plate, the assembly of the battery cell device, the wiring to and from the battery cell device, and / or the overall space requirements can be improved. That is, since both the positive busbar plate and the negative busbar plate are disposed relative to the same side of the cylindrical battery cells, thus, since connections can be disposed on one side of the cylindrical battery cells, the assembly of the battery cell device can be facilitated, for the same reason, the wiring can be facilitated, and / or the space requirements of the battery cell device can be reduced, and it can be facilitated to and from the battery cell device. Technical benefits may include improving the design and / or management of the battery cell device. Another technical benefit may include improving the arrangement of the electrical connections between the positive and negative electrode terminals of the cylindrical battery cells and the corresponding positive and negative busbar plates. Therefore, due to the arrangement of the positive busbar terminals and the second openings of the positive busbar plate, the first aspect can provide an improved battery cell device. It should be understood that each of the negative electrode terminals of the plurality of cylindrical battery cells is disposed to make electrical contact with the negative busbar plate at an associated second opening of the positive busbar plate, and this electrical contact can be achieved through direct contact between the negative busbar plate and the corresponding negative electrode terminals of the plurality of cylindrical battery cells. Thus, the negative busbar plate can be directly connected to the corresponding negative electrode terminals of the plurality of cylindrical battery cells. The electrical contact can be achieved by welding (e.g., by laser welding).Correspondingly, each of the positive busbar terminals is in electrical contact with a corresponding positive terminal of the plurality of cylindrical battery cells, and this electrical contact can be achieved by direct contact between the positive busbar terminal and the corresponding positive terminal of the plurality of cylindrical battery cells. Thus, the positive busbar terminals can be directly connected here to the corresponding positive terminals of the plurality of cylindrical battery cells. The electrical contact can be achieved by welding (e.g., by laser welding). The negative busbar plate and the positive busbar plate can be referred to as inter-cell busbar plates. The battery cell device can be configured, for example, for a vehicle.

[0006] Optionally, in some examples, including in at least one preferred example, the positive busbar plate is laminated and / or the negative busbar plate is laminated. Thus, the positive busbar plate and / or the negative busbar plate can be laminated with an electrically insulating material except at the corresponding openings and terminals. The material of the negative busbar plate and the positive busbar plate (i.e., the interior of the lamination) is typically copper or aluminum.

[0007] Optionally, in some examples, including in at least one preferred example, the positive terminal and the negative terminal of each of the plurality of cylindrical battery cells are separated by a gap, or by a non-conductive portion of the cylindrical battery cell. The gap can, for example, extend in the radial direction between the positive terminal and the negative terminal of each of the plurality of cylindrical battery cells.

[0008] Optionally, in some examples, including in at least one preferred example, each of the positive busbar terminals of the positive busbar plate is formed to resemble an indentation in the positive busbar plate. Technical benefits can include an improved arrangement of the electrical connection between the positive busbar plate and the positive terminals of the plurality of cylindrical battery cells. For example, due to the indentation, the positive busbar plate arranged to be supported on the negative busbar plate can be electrically connected to the positive terminals of the plurality of cylindrical battery cells.

[0009] Optionally, in some examples, including in at least one preferred example, each of the indentations extends into a corresponding first opening of the negative busbar plate. Technical benefits can include an improved arrangement of the electrical connection between the positive busbar plate and the positive terminals of the plurality of cylindrical battery cells. For example, the indentation extends axially for a distance at least as long as the axial extension length of the negative busbar plate (commonly referred to as the thickness of the negative busbar plate). Thus, the indentation can extend from a first axial position at the positive busbar plate, axially towards the positive terminals of the plurality of cylindrical battery cells at a second axial position different from the first axial position and contact these positive terminals. The indentation typically extends through the first opening associated with it in the negative busbar plate.

[0010] Optionally, in some examples, including in at least one preferred example, each of the indentations forms a bridging portion between opposite sides of the corresponding positive bus bar terminal. Technical benefits can include a favorable structure for electrically contacting the positive bus bar plate with the positive terminals of the plurality of cylindrical battery cells. For example, due to the bridging shape, an electrical connection between the indentation and the positive terminals of the plurality of cylindrical battery cells can be easily achieved, such as by welding.

[0011] Optionally, in some examples, including in at least one preferred example, the bridging portion formed by each indentation includes a lateral side adjacent to the void. Through the void and due to the bridging shape, the indentation can be easily bent or pressed towards the positive terminals of the plurality of cylindrical battery cells. Thereby, an electrical connection between the indentation of the plurality of cylindrical battery cells and the positive terminals can be more easily achieved.

[0012] Optionally, in some examples, including in at least one preferred example, the negative bus bar plate is supported on the negative terminals of the cylindrical battery cells. Technical benefits can include reliable support for the negative bus bar plate. In addition, since the negative bus bar plate can be electrically connected to the negative terminals of the plurality of cylindrical battery cells, such as by welding, via the second opening of the positive bus bar plate, it facilitates the electrical connection between the negative bus bar plate and the negative terminals of the plurality of cylindrical battery cells.

[0013] Optionally, in some examples, including in at least one preferred example, each of the second openings in the positive bus bar plate is formed as an annular sector. Technical benefits can include improved electrical connection with the negative terminals of the plurality of cylindrical battery cells. That is, since the negative terminals are circumferentially arranged around the positive terminals of each of the plurality of cylindrical battery cells, the negative terminals can be formed in a ring shape, and by setting the second openings in the positive bus bar plate as annular sectors, the alignment between the second openings and the negative terminals of the plurality of cylindrical battery cells is improved. The annular sector of the second opening can be referred to as an annular segment.

[0014] Optionally, in some examples, including in at least one preferred example, the annular sector of each second opening is defined by an angle between 30° and 180°. Technical benefits can include an opening that is sufficient but not excessive for providing an electrical connection between the negative bus bar plate and the negative terminals of the plurality of cylindrical battery cells.

[0015] Optionally, in some examples, including in at least one preferred example, the plurality of cylindrical battery cells are electrically connected in parallel via the negative bus bar and the positive bus bar. Technical benefits can include improving the arrangement of the cylindrical battery cells in a parallel arrangement. The cylindrical battery cells in a parallel arrangement share the negative bus bar and the positive bus bar on the same side. For example, a plurality of cylindrical battery cells form a predetermined number of cylindrical battery cells and form a "logical cell device". Then, several such "logical cell devices" can be connected in series inside a battery pack including the battery cell device.

[0016] Optionally, in some examples, including in at least one preferred example, the plurality of cylindrical battery cells are a first set of cylindrical battery cells, the negative bus bar is a first negative bus bar and the positive bus bar is a first positive bus bar, wherein the battery cell device includes: a second set of cylindrical battery cells, each of the cylindrical battery cells in the second set having a top surface including a centrally disposed positive terminal and a negative terminal circumferentially disposed around the positive terminal; a second negative bus bar arranged to support on the top surface of the second set of cylindrical battery cells, and a second positive bus bar arranged to be electrically isolated from and support on the second negative bus bar, and wherein the first positive bus bar includes a first lateral connection side, and the second positive bus bar includes a second lateral connection side arranged to be connected to the first lateral connection side such that the first positive bus bar and the second positive bus bar are arranged side by side. Technical benefits can include improving the arrangement of the plurality of cylindrical battery cells. That is, the first set of cylindrical battery cells can be arranged in a favorable manner relative to the second set of cylindrical battery cells, with the improvements related to the assembly of the battery cell device, the wiring to and from the battery cell device, and / or the overall space requirements as mentioned above.

[0017] Optionally, in some examples, including at least one preferred example, the second positive busbar is electrically connected to the first negative busbar such that the first set of cylindrical battery cells is electrically connected in series with the second set of cylindrical battery cells. Technical benefits can include improved electrical connection and arrangement of multiple cylindrical battery cells. Thus, the first set of cylindrical battery cells can be electrically connected in series with the second set of cylindrical battery cells. Thereby, the battery cell device can be expanded. For example, the voltage of the battery cell device can be adjusted. For example, as described above, the cylindrical battery cells can be grouped into "logical cell devices". Thus, the parallel connection between the cylindrical battery cells in the first set of cylindrical battery cells can form a first "logical cell device", and the parallel connection between the cylindrical battery cells in the second set of cylindrical battery cells can form a second "logical battery arrangement". Thereafter, the first "logical cell device" and the second "logical cell device" can be connected in series as described above. As needed, more than two such corresponding "logical cell devices" can be connected in series and, for example, constitute the battery cells of a battery pack. Thereby, the voltage of the battery cell device can be adjusted as needed. Thus, a modular battery cell device can be achieved. That is, in some examples, including at least one preferred example, the operating voltage of the battery cell device can be scaled by the number of sets of cylindrical battery cells. Technical benefits can include an effective way to adjust the operating voltage of the battery cell device. That is, the battery cell device can include multiple sets of cylindrical battery cells, where each set is arranged in a manner corresponding to the first set of cylindrical battery cells and the second set of cylindrical battery cells as described above (i.e., having a corresponding arrangement of negative and positive busbars). For example, the battery cell device can include multiple sub-parts, where each sub-part includes multiple cylindrical battery cells, which are arranged in a predetermined set through the corresponding negative and positive busbars as described above, and each of the sub-parts includes a corresponding first lateral connection side and a second lateral connection side arranged opposite to each other such that the sub-parts can be electrically connected through the first connection side of the first sub-part to the corresponding second connection side of the second sub-part, as described above.

[0018] Optionally, in some examples, including at least one preferred example, the second positive busbar includes a plurality of interconnects arranged in the second lateral connection side for electrically connecting the first negative busbar to the second positive busbar. Technical benefits can include a simple and effective structure for electrically connecting the first set of cylindrical battery cells to the second set of cylindrical battery cells. By providing a plurality of interconnects that electrically connect the second positive busbar to the first negative busbar, a more reliable electrical connection is provided. The interconnects can be, for example, interconnect welds.

[0019] Optionally, in some examples, including at least one preferred example, the first lateral coupling side of the first positive busbar includes a plurality of notches, and the second lateral coupling side of the second positive busbar includes a plurality of protrusions, the size and dimensions of the plurality of protrusions being designed to match the notches. Technical benefits can include a reliable structure for mating the first lateral coupling side with the second lateral coupling side. Additionally, the plurality of notches and the plurality of protrusions provide a space-saving structure for the first and second lateral coupling sides.

[0020] Optionally, in some examples, including at least one preferred example, the second lateral coupling side of the second positive busbar includes a plurality of second interconnecting sections disposed between the plurality of protrusions, wherein the second interconnecting sections include the interconnecting section. Technical benefits can include improved electrical connection between the second positive busbar and the first negative busbar. For example, due to the reliable mating structure between the first lateral coupling side and the second lateral coupling side (due to the plurality of notch protrusions), the electrical connection between the second positive busbar and the first negative busbar can be made more reliable through the interconnecting section (disposed between the plurality of protrusions). The second interconnecting sections can be straight connections compared to the plurality of protrusions disposed therebetween.

[0021] Optionally, in some examples, including at least one preferred example, the first lateral coupling side of the first positive busbar includes a plurality of first interconnecting sections disposed between the plurality of notches, wherein the first negative busbar overlaps the second positive busbar at the first interconnecting sections. Technical benefits can include a reliable structure for mating the first lateral coupling side with the second lateral coupling side. Additionally, the overlapping structure provides a space-saving structure for the first and second lateral coupling sides.

[0022] Optionally, in some examples, including at least one preferred example, each of the protrusions on the second lateral coupling side is disposed adjacent to a corresponding positive busbar terminal of the second positive busbar. Technical benefits can include a space-saving structure. For example, the positive busbar terminals of the second positive busbar can be arranged to extend at least partially into the associated protrusions.

[0023] Optionally, in some examples, including at least one preferred example, the plurality of cylindrical battery cells axially extend from a bottom surface to a top surface, wherein the plurality of first openings are axially aligned with the plurality of positive busbar terminals, and wherein the plurality of second openings are axially aligned with the negative terminals of the plurality of cylindrical battery cells. Technical benefits may include an improved arrangement of the plurality of cylindrical battery cells with respect to the positive busbar plate and the negative busbar plate. The plurality of cylindrical battery cells include positive terminals and negative terminals facing the same direction (i.e., the direction of the negative busbar plate and the positive busbar plate). Thus, the axial direction of the battery cell device may be defined by the axial direction of the cylindrical battery cells. In other words, in terms of the axial direction, the negative busbar plate may be described as being disposed on the top surface of the plurality of cylindrical battery cells, and the positive busbar plate may be described as being disposed on top of the negative busbar plate. For example, the axial direction of the battery cell device may be aligned with the direction of gravity.

[0024] Optionally, in some examples, including at least one preferred example, the battery cell device may be defined by a Cartesian coordinate system using the xyz axes, wherein the axial direction extends along the z-axis, and wherein the plates of the negative busbar plate and the positive busbar plate extend in the xy plane.

[0025] Optionally, in some examples, including at least one preferred example, the plurality of cylindrical battery cells are arranged in a matrix of rows and columns. Technical benefits may include an improved arrangement of the plurality of cylindrical battery cells. For example, the matrix may provide a space-saving arrangement of the plurality of cylindrical battery cells.

[0026] According to a second aspect of the present disclosure, a vehicle is provided, the vehicle including the battery cell device of the first aspect of the present disclosure. The second aspect of the present disclosure may seek to solve the same problems as those described for the first aspect of the present disclosure. Thus, the effects and features of the second aspect of the present disclosure are largely similar to those described above in connection with the first aspect of the present disclosure.

[0027] Optionally, in some examples, including at least one preferred example, the vehicle further includes a traction motor for propelling the vehicle, the traction motor being powered by the battery cell device.

[0028] The disclosed aspects, examples (including any preferred examples) and / or the appended claims may be appropriately combined with each other, which will be apparent to any ordinary person skilled in the art. Additional features and advantages are disclosed in the following description, claims and drawings, and will be partly apparent to those skilled in the art or will be recognized by practicing the present disclosure as described herein. Description of the Drawings

[0029] Figure 1 is an exemplary partial schematic side view of an electric vehicle according to an example, the electric vehicle including an electric motor for propelling the vehicle and a battery pack device for powering the electric motor.

[0030] Figure 2 is an exemplary exploded perspective view of a battery cell device according to an example.

[0031] Figure 3 is a perspective view of an exemplary battery cell of a battery cell device according to an example.

[0032] Figure 4 is an exemplary top view of a battery cell device according to an example.

[0033] Figure 5 is an exemplary perspective view and partial cross-sectional view of details of a battery cell device according to an example.

[0034] Figure 6 is an exemplary perspective view of details of a battery cell device according to an example. Detailed Description

[0035] The detailed description set forth below provides information and examples of the disclosed technology in sufficient detail to enable a person of ordinary skill in the art to practice the disclosure.

[0036] The disclosed technology can address problems related to inefficient and / or cumbersome inter-cell busbar arrangements. The disclosed technology includes a particular arrangement of a positive busbar and a negative busbar, and a corresponding arrangement of a plurality of cylindrical battery cells relative to the positive busbar and the negative busbar. Through the arrangement of the cylindrical battery cells and the positive busbar and the negative busbar, the assembly of the battery cell device, the wiring to and from the battery cell device, and / or the overall space requirements can be improved. Technical benefits can include improving the design and / or management of the battery cell device. Another technical benefit can include improving the arrangement of the electrical connections between the positive and negative terminals of the cylindrical battery cells and the corresponding positive and negative busbars.

[0037] Figure 1 Vehicle 1 in the form of an exemplary heavy-duty truck is shown. Vehicle 1 is an electric vehicle, such as a pure electric vehicle or a hybrid vehicle, including at least one electric motor 10 (as a traction motor) powered by a battery pack device 30, where in Figure 1 the example, the battery pack device 30 includes three battery packs 31, 41, 51 connected in parallel. However, it should be noted that fewer or more battery packs can be included in the battery pack device 30, such as a single battery pack, two battery packs, or more than three battery packs.

[0038] The battery packs 31, 41, 51 are configured to provide power to at least one load, such as the electric motor 10. Additionally, the vehicle 1 includes a control unit 17 that is arranged and configured to control at least part of the operation of the battery pack device 30, such as, for example, the operation of the contactors of the battery pack device 30. The vehicle 1 typically also includes other parts of the powertrain, such as a transmission, a drive shaft, and wheels (not shown in detail). The electric motor 10 can act as an electric motor, consuming electrical power provided by the battery packs 31, 41, 51, for example to provide propulsion power, and can act as a generator to generate electrical power to charge the battery packs 31, 41, 51.

[0039] In Figure 2 , a battery cell device 110 including a plurality of cylindrical battery cells 120 is shown in an exploded view, and in Figure 3 , one of the plurality of cylindrical battery cells 120, a cylindrical battery cell 122, is shown in a perspective view. The battery cell device 110 is typically contained within a battery pack, such as Figure 1 one of the battery packs 31, 41, 51 of the battery pack device 30. Typically, each of the plurality of cylindrical battery cells 120 corresponds structurally and functionally to the Figure 3 cylindrical battery cell 122 shown in Figure 3 , and thus references hereinafter to the features of the plurality of cylindrical battery cells 120 are the same as references to the features of the Figure 3 cylindrical battery cell 122 in

[0040] The battery cell device 110 includes a negative bus bar 130 and a positive bus bar 140 to which the plurality of battery cells 120 are electrically connected. Figure 2 The battery cell device 110 in

[0041] Each of the plurality of cylindrical battery cells 120 of the battery cell device 110 includes a corresponding top surface 122a, the top surface including a centrally disposed positive electrode terminal 124 and a negative electrode terminal 126 circumferentially disposed around the positive electrode terminal 124. In addition, a negative bus bar 130 is arranged to support on the top surfaces 122a of the plurality of cylindrical battery cells 120. Thus, with reference to the xyz axes, the negative bus bar 130 is arranged above and on top of the plurality of cylindrical battery cells 120. A positive bus bar 140 is arranged to be electrically insulated from the negative bus bar 130 and supported on the negative bus bar. Thus, with reference to the xyz axes, the positive bus bar 140 is arranged above and on top of the negative bus bar 130.

[0042] The positive bus bar 140 includes a plurality of positive bus bar terminals 144 that are aligned or axially aligned with the positive electrode terminals 124 of the plurality of cylindrical battery cells 120. In addition, the negative bus bar 130 includes a plurality of first openings 132 that are aligned or axially aligned with the plurality of positive bus bar terminals 144. In addition, the positive bus bar 140 includes a plurality of second openings 146 that are aligned or axially aligned with the negative electrode terminals 126 of the plurality of cylindrical battery cells 120. Thus, each of the positive bus bar terminals 144 can be arranged to contact or electrically contact the corresponding positive electrode terminal 124 of the plurality of cylindrical battery cells 120, and each of the negative electrode terminals 126 of the plurality of cylindrical battery cells 120 can be arranged to contact or electrically contact the negative bus bar 130 at the associated second opening 146 of the positive bus bar 140. Thus, the plurality of cylindrical battery cells 120 can be electrically connected in parallel via the negative bus bar terminal 130 and the positive bus bar terminal 140.

[0043] For example, as Figure 2 shown, a first positive bus bar terminal 144a is axially aligned with the positive electrode terminal 124 of a first cylindrical battery cell 122, and a first one 132a of the first openings 132 in the negative bus bar 130 is axially aligned with the first positive bus bar terminal 144a. Correspondingly, a first one 146a of the second openings 146 is axially aligned with the negative electrode terminal 126 of the first cylindrical battery cell 122. Thus, the first positive bus bar terminal 144a can be arranged to electrically contact the positive electrode terminal 124 of the first cylindrical battery cell 122, and the negative electrode terminal 126 of the first cylindrical battery cell 122 can be arranged to electrically contact the negative bus bar 130 at the first one 146a of the second openings 146 in the positive bus bar 140.

[0044] Figure 4 The left portion of shows the resulting arrangement of the plurality of cylindrical battery cells 120, the negative bus bar 130, and the positive bus bar 140, where Figure 2The battery cell device 110 is shown as the first sub - part 110a of the battery cell device 110'. Here, it can be clearly seen that a plurality of cylindrical battery cells 120 are arranged in a matrix of rows and columns. Here, the rows and columns are formed by 36 parallel - connected cylindrical battery cells 120.

[0045] Turning to Figure 5 , a detailed perspective view and a partial cross - sectional view of the first cylindrical battery cell 122 and the corresponding parts of the negative bus bar 130 and the positive bus bar 140 are shown. Here, the first positive bus bar terminal 144a is formed to be similar to the indentation 145a in the positive bus bar 140. The indentation 145a extends into the first of the first openings 132a in the negative bus bar 130. As Figure 5 shown, the indentation 145a extends in the axial direction through the first of the first openings 132a and all the way to the positive terminal 124 of the first cylindrical battery cell 122. Thus, the indentation 145 can be in electrical contact with the positive terminal 124 of the first cylindrical battery cell 122. As Figure 5 shown, the indentation 145a is in direct contact with the positive terminal 124 of the first cylindrical battery cell 122, which can be achieved, for example, by welding.

[0046] The indentation 145a is formed as a bridging portion 145b, which is arranged to extend from the first side of the first positive bus bar terminal 145a to the second opposite side of the first positive bus bar terminal 145a. In addition, the bridging portion 145b is formed by two parallel lateral sides 145c, 145d of the indentation 145a. One or both of the lateral sides 145c, 145d are adjacent to the gap 147. Through the gap 147 (or gaps if both lateral sides 145c, 145d are adjacent to gaps), and due to the bridging shape, the indentation 145a can be easily bent or pressed towards the positive terminal 124 of the first cylindrical battery cell 122. It should be noted that each of the positive bus bar terminals 144 in the positive bus bar 140 is generally formed to be similar to the first positive bus bar terminal 144a and has a corresponding indentation.

[0047] Also as Figure 5As shown, the negative electrode bus bar 130 is supported on the negative terminal 126 of the first cylindrical battery cell 122. Also as shown, the first of the second openings 146, i.e., 146a, is formed as an annular sector in the positive electrode bus bar 140. Thus, and since the negative terminal 126 of the first cylindrical battery cell 122 is circumferentially arranged around the positive terminal 124, it is beneficial for the alignment of the first of the second openings 146, i.e., 146a, with the negative terminal 124 of the first cylindrical battery cell 122. The annular sector of the first of the second openings 146, i.e., 146a, may be defined by its angle of approximately 45°. That is, the annular sector extends at approximately 45° along the circular axis conforming to the shape of the annular section. It should be noted that each of the second openings 146 in the positive electrode bus bar 140 is generally formed similar to the first of the second openings 146, i.e., 146a, and has a corresponding annular sector.

[0048] Returning to Figure 4 , a top view of the battery cell device 110' is shown, which includes two sub - parts, namely the previously described first sub - part 110a (including the battery cell device 110 described in reference Figures 2 to 3 ), and the second sub - part 110b, which is arranged in a manner corresponding to the first sub - part 110a. More specifically, the aforementioned plurality of cylindrical battery cells 120 are referred to as the first group of cylindrical battery cells 120, the negative electrode bus bar 130 is referred to as the first negative electrode bus bar 130, and the positive electrode bus bar 140 is referred to as the first positive electrode bus bar 140. The second sub - part 110b includes a second group of cylindrical battery cells 120', and each of the cylindrical battery cells in the second group 122' corresponds in structure and function to Figure 3 the cylindrical battery cell 122 shown. Thus, the references to the characteristics of the plurality of cylindrical battery cells 120 hereinafter are the same as the references to the characteristics of the cylindrical battery cell 122 in Figure 3 . Therefore, each of the cylindrical battery cells in the second group 122' has a top surface 122a, which includes a positive terminal 124 arranged in the center and a negative terminal 126 circumferentially arranged around the positive terminal 124. The second sub - part 110b of the battery cell device 110' includes a second negative electrode bus bar 130' arranged to be supported on the top surface 122a of the second group of cylindrical battery cells 120', and a second positive electrode bus bar 140' arranged to be electrically isolated from the second negative electrode bus bar 130' and supported on the second negative electrode bus bar. Thus, the second negative electrode bus bar 130' may have a structure and function corresponding to those of the first negative electrode bus bar 130, and the second positive electrode bus bar 140' may have a structure and function corresponding to those of the first positive electrode bus bar 140.

[0049] As Figure 4 andFigure 6 As shown in the detailed perspective view, the first positive bus bar 140 includes a first lateral connection side 141, and the second positive bus bar 140' includes a second lateral connection side 141', which is arranged to be connected to the first lateral connection side 141 such that the first positive bus bar 140 and the second positive bus bar 140' are arranged side by side. Thus, the second positive bus bar 140' can be electrically connected to the first negative bus bar 130, so that the first group of cylindrical battery cells 120 and the second group of cylindrical battery cells 120' are connected in series electrically. In Figure 4 In an example of, the second positive bus bar 140' includes a plurality of interconnecting portions 142' arranged in the second lateral connection side 141' for electrically connecting the first negative bus bar 130 and the second positive bus bar 140'. The interconnecting portion 142' can be, for example, an interconnecting weld portion.

[0050] Also as Figure 4 shown, the first lateral connection side 141 of the first positive bus bar 140 includes a plurality of notches 143, and the second lateral connection side 141' of the second positive bus bar 140' includes a plurality of protrusions 145', and the size and dimension of the plurality of protrusions are designed to match the notches 143. Thus, the first positive bus bar 140 and the second positive bus bar 140' can be arranged to physically cooperate with each other, and the first sub - part 110a can be coupled to the second sub - part 110b, as Figure 6 shown.

[0051] In Figure 4 an example of, the second lateral connection side 141' of the second positive bus bar 140' includes a plurality of second interconnecting section segments 147' arranged between the plurality of protrusions 145', and the second interconnecting section segment 147' includes the interconnecting portion 142'. Therefore, when the first positive bus bar 140 and the second positive bus bar 140' are mated as described above, the interconnecting portion 142' is automatically arranged in the correct position. Thus, a reliable physical and electrical connection between the first sub - part 110a and the second sub - part 110b of the battery cell device 110' is provided. In addition, the first lateral connection side 141 of the first positive bus bar 140 can include a plurality of first interconnecting section segments 147, which are arranged between the plurality of notches 143, and the first negative bus bar 130 overlaps with the second positive bus bar 140' at the first interconnecting section segment 147. That is, when the first positive bus bar 140 is mated with the second positive bus bar 140', the first negative bus bar 130 overlaps with the second positive bus bar 140' at the first interconnecting section segment 147, thereby further improving the overall structure between the first sub - part 110a and the second sub - part 110b of the battery cell device 110'. As Figure 4As shown, each of the protrusions 145' in the second lateral connection side 141' is arranged adjacent to the corresponding positive busbar terminal 144' of the second positive busbar plate 140'. In addition, each of the first interconnecting sections 147 in the first lateral connection side 141 is arranged adjacent to the corresponding positive busbar terminal 144 of the first positive busbar plate 140.

[0052] It should be noted that all of the cylindrical battery cells 120 in the first group are electrically connected in parallel via the first negative busbar plate 130 and the first positive busbar plate 140. Correspondingly, all of the cylindrical battery cells 120' in the second group are electrically connected in parallel via the second negative busbar plate 130' and the second positive busbar plate 140'.

[0053] Generally, the second sub - part 110b of the battery cell device 110' includes a first connection side arranged opposite to the second connection side 141', wherein the first connection side of the second sub - part 110b corresponds in structure and function to the first connection side 141 of the first sub - part 110a. Thus, another sub - part corresponding to the first sub - part 110a and the second sub - part 110b of the battery cell device 110' can be connected to the second sub - part 110b.

[0054] The battery cell device disclosed herein can also be used in stationary units such as buildings and / or any stationary machinery.

[0055] Example 1. A battery cell device, comprising: a plurality of cylindrical battery cells, each of the cylindrical battery cells having a top surface including a positive terminal arranged centrally and a negative terminal arranged circumferentially around the positive terminal; a negative busbar plate arranged to support on the top surfaces of the plurality of cylindrical battery cells, and a positive busbar plate arranged to be electrically isolated from and support on the negative busbar plate, the positive busbar plate including a plurality of positive busbar terminals aligned with the positive terminals of the plurality of cylindrical battery cells, and the negative busbar plate including a plurality of first openings aligned with the plurality of positive busbar terminals; wherein the positive busbar plate includes a plurality of second openings aligned with the negative terminals of the plurality of cylindrical battery cells, and wherein each of the positive busbar terminals is arranged to contact the corresponding positive terminal of the plurality of cylindrical battery cells, and each of the negative terminals of the plurality of cylindrical battery cells is arranged to contact the negative busbar plate at the associated second openings of the positive busbar plate.

[0056] Example 2. The battery cell device according to Example 1, wherein each of the positive busbar terminals of the positive busbar plate is formed to be similar to an indentation in the positive busbar plate.

[0057] Example 3. The battery cell device according to Example 2, wherein each of the indentations extends into a corresponding first opening of the negative bus bar.

[0058] Example 4. The battery cell device according to any one of Examples 2 to 3, wherein each of the indentations forms a bridging portion between opposite sides of a corresponding positive bus bar terminal.

[0059] Example 5. The battery cell device according to Example 4, wherein the bridging portion formed by each indentation includes a lateral side adjacent to the gap.

[0060] Example 6. The battery cell device according to any one of Examples 1 to 5, wherein the negative bus bar is supported on the negative terminal of the cylindrical battery cell.

[0061] Example 7. The battery cell device according to any one of Examples 1 to 6, wherein each of the second openings in the positive bus bar is formed as an annular sector.

[0062] Example 8. The battery cell device according to Example 7, wherein the annular sector of each second opening is defined by an angle between 30° and 180°.

[0063] Example 9. The battery cell device according to any one of Examples 1 to 8, wherein the plurality of cylindrical battery cells are electrically connected in parallel via the negative bus bar and the positive bus bar.

[0064] Example 10. The battery cell device according to any one of Examples 1 to 9, wherein the plurality of cylindrical battery cells are a first set of cylindrical battery cells, the negative bus bar is a first negative bus bar and the positive bus bar is a first positive bus bar, wherein the battery cell device includes: a second set of cylindrical battery cells, each of the cylindrical battery cells in the second set having a top surface including a positive terminal disposed centrally and a negative terminal disposed circumferentially around the positive terminal; a second negative bus bar arranged to be supported on the top surface of the second set of cylindrical battery cells, and a second positive bus bar arranged to be electrically isolated from and supported on the second negative bus bar, and wherein the first positive bus bar includes a first lateral connection side, and the second positive bus bar includes a second lateral connection side arranged to be connected to the first lateral connection side such that the first positive bus bar and the second positive bus bar are arranged side by side.

[0065] Example 11. The battery cell device according to Example 10, wherein the second positive bus bar is electrically connected to the first negative bus bar such that the first group of cylindrical battery cells and the second group of cylindrical battery cells are electrically connected in series.

[0066] Example 12. The battery cell device according to any one of Examples 10 to 11, wherein the second positive bus bar includes a plurality of interconnecting portions disposed in the second lateral connection side for electrically connecting the first negative bus bar and the second positive bus bar.

[0067] Example 13. The battery cell device according to any one of Examples 10 to 12, wherein the first lateral connection side of the first positive bus bar includes a plurality of recesses, and the second lateral connection side of the second positive bus bar includes a plurality of protrusions, and the size and dimensions of the plurality of protrusions are designed to match the recesses.

[0068] Example 14. The battery cell device according to Examples 12 to 13, wherein the second lateral connection side of the second positive bus bar includes a plurality of second interconnecting portion segments disposed between the plurality of protrusions, and the second interconnecting portion segments include the interconnecting portions.

[0069] Example 15. The battery cell device according to Example 14, wherein the first lateral connection side of the first positive bus bar includes a plurality of first interconnecting portion segments disposed between the plurality of recesses, and the first negative bus bar overlaps the second positive bus bar at the first interconnecting portion segments.

[0070] Example 16. The battery cell device according to any one of Examples 13 to 15, wherein each of the protrusions on the second lateral connection side is disposed adjacent to a corresponding positive bus terminal of the second positive bus bar.

[0071] Example 17. The battery cell device according to any one of Examples 1 to 16, wherein the plurality of cylindrical battery cells axially extend from a bottom surface to a top surface, and wherein the plurality of first openings are axially aligned with the plurality of positive bus terminals, and wherein a plurality of second openings are axially aligned with the negative terminals of the plurality of cylindrical battery cells.

[0072] Example 18. The battery cell device according to any one of Examples 1 to 17, wherein the plurality of cylindrical battery cells are arranged in a matrix of rows and columns.

[0073] Example 19. A vehicle comprising the battery cell device according to any one of Examples 1 to 18.

[0074] Example 20. The vehicle according to Example 19 includes a traction motor powered by the battery cell device.

[0075] The terms used herein are for the purpose of describing particular aspects only and are not intended to limit the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It should also be understood that the terms "comprises" and / or "comprising", when used herein, specify the presence of the stated features, integers, acts, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, acts, steps, operations, elements, components, and / or groups thereof.

[0076] It should be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0077] Relative terms such as "below" or "above", or "upper" or "lower", or "horizontal" or "vertical" may be used herein to describe the relationship of one element to another element, as shown in the figures. It should be understood that these terms, as well as those discussed above, are intended to cover different device orientations in addition to the orientation depicted in the figures. It should be understood that when an element is referred to as "connected to" or "coupled to" another element, the element can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as "directly connected to" or "directly coupled to" another element, no intervening elements are present.

[0078] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It should also be understood that, unless explicitly defined herein, the terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art and should not be interpreted in an idealized or overly formal sense.

[0079] [[ID=,15]]It should be understood that the disclosure is not limited to the aspects described above and shown in the figures; rather, those skilled in the art will recognize that many changes and modifications can be made within the scope of the disclosure and the appended claims. In the figures and the specification, the aspects have been disclosed for purposes of illustration only and not for purposes of limitation, and the scope of the disclosure is set forth in the appended claims.

Claims

1. A battery cell device (110), comprising: - a plurality of cylindrical battery cells (120, 122), each of the cylindrical battery cells (120, 122) having a top surface (122a) including a centrally disposed positive terminal (124) and a negative terminal (126) disposed circumferentially around the positive terminal (124), - a negative busbar plate (130) arranged to be supported on the top surfaces (122a) of the plurality of cylindrical battery cells (120, 122), and a positive busbar plate (140) arranged to be electrically isolated from and supported on the negative busbar plate (130), the positive busbar plate (140) including a plurality of positive busbar terminals (144, 144a) aligned with the positive terminals (124) of the plurality of cylindrical battery cells (120), and the negative busbar plate (130) including a plurality of first openings (132, 132a) aligned with the plurality of positive busbar terminals (144, 144a), wherein the positive bus plate (140) includes a plurality of second openings (146, 146a) aligned with the negative terminals (126) of the plurality of cylindrical battery cells (120), and wherein each of the positive bus terminals (144, 144a) is arranged to contact a corresponding positive terminal (124) of the plurality of cylindrical battery cells (120, 122), and wherein each of the negative terminals (126) of the plurality of cylindrical battery cells (120, 122) is arranged to contact the negative bus plate (130) at an associated second opening (146, 146a) of the positive bus plate (140).

2. The battery cell device (110) of claim 1, wherein each of the positive bus terminals (144, 144a) of the positive bus plate is formed similar to an indentation (145a) in the positive bus plate (140).

3. The battery cell device (110) according to claim 2, wherein each of the indentations (145a) extends into a corresponding first opening (132, 132a) of the negative busbar plate (130).

4. The battery cell arrangement (110) of any one of claims 2 to 3, wherein each of the indentations (145a) forms a bridge (145b) between opposing sides of a corresponding positive bus terminal (144, 144a).

5. The battery cell arrangement (110) of claim 4, wherein the formed bridge portion (145b) of each indentation (145a) includes lateral sides (145c, 145d) adjacent the gap (147).

6. The battery cell device (110) according to any one of claims 1 to 5, wherein the negative busbar (130) is supported on the negative terminal (126) of the cylindrical battery cell (120, 122).

7. The battery cell arrangement (110) according to any one of claims 1 to 6, wherein each of the second openings (146, 146a) in the positive busbar is formed as an annular sector.

8. The battery cell arrangement (110) according to claim 7, wherein the annular sector of each second opening (146, 146a) is defined by an angle between 30° and 180°.

9. The battery cell device (110) according to any one of claims 1 to 8, wherein the plurality of cylindrical battery cells (120, 122) are electrically connected in parallel via the negative busbar (130) and the positive busbar (140).

10. The battery cell arrangement (110) according to any one of claims 1 to 9, wherein the plurality of cylindrical battery cells (120, 122a) are a first group of cylindrical battery cells, the negative busbar (130) is a first negative busbar and the positive busbar (140) is a first positive busbar, wherein the battery cell arrangement (110) comprises: a second group of cylindrical battery cells (120', 122), each of the cylindrical battery cells (122) in the second group (122') having a top surface (122a) including a centrally disposed positive terminal (124) and a negative terminal (126) disposed circumferentially around the positive terminal (124); and a second negative busbar plate (130') arranged to support the second group of cylindrical battery cells (120', 122). 122), and a second positive busbar plate (140'), the second positive busbar plate being arranged to be electrically isolated from and supported on the second negative busbar plate (130'), and wherein the first positive busbar plate (140) includes a first transverse connecting side (141), and the second positive busbar plate (140') includes a second transverse connecting side (141'), the second transverse connecting side being arranged to be connected to the first transverse connecting side (141), so that the first positive busbar plate (140) and the second positive busbar plate (140') are arranged side by side.

11. The battery cell device (110) of claim 10, wherein the second positive busbar (140') is electrically connected to the first negative busbar (130) such that the first group of cylindrical battery cells (120) and the second group of cylindrical battery cells (120') are electrically connected in series.

12. The battery cell arrangement (110) according to any one of claims 10 to 11, wherein the second positive busbar (140') comprises a plurality of interconnections (142') arranged in the second transverse connecting side (141') for electrically connecting the first negative busbar (130) to the second positive busbar (140').

13. The battery cell device (110) according to any one of claims 10 to 12, wherein the first transverse connecting side (141) of the first positive busbar (140) includes a plurality of recesses (143), and the second transverse connecting side (141') of the second positive busbar (140') includes a plurality of protrusions (145'), the size and dimensions of the plurality of protrusions being designed to match the recesses (143).

14. The battery cell arrangement (110) according to claim 12 to 13, wherein the second transverse coupling side (141') of the second positive busbar (140') comprises a plurality of second interconnection segments (147') arranged between the plurality of protrusions (145'), wherein the second interconnection segments (147') comprise the interconnection portion (142').

15. The battery cell arrangement (110) of claim 14, wherein the first transverse connecting side (141) of the first positive busbar plate (140) comprises a plurality of first interconnection sections (147) arranged between the plurality of recesses (143), wherein the first negative busbar plate (130) overlaps the second positive busbar plate (140') at the first interconnection sections (147).

16. The battery cell arrangement (110) according to any one of claims 13 to 15, wherein each of the protrusions (145') of the second transverse coupling side (141') is arranged adjacent to a corresponding positive bus terminal (144') of the second positive busbar (140').

17. The battery cell device (110) of any one of claims 1 to 16, wherein the plurality of cylindrical battery cells (120, 122) extend axially from a bottom surface (122b) to a top surface (122a), and wherein the plurality of first openings (132) are axially aligned with the plurality of positive bus terminals (122a), and wherein the plurality of second openings (146, 146a) are axially aligned with the negative terminals (126) of the plurality of cylindrical battery cells (120, 122).

18. The battery cell arrangement (110) according to any one of claims 1 to 17, wherein the plurality of cylindrical battery cells (120, 122) are arranged in a matrix of rows and columns.

19. A vehicle (1) comprising a battery cell arrangement (110) according to any one of claims 1 to 18.

20. The vehicle (1) according to claim 19, comprising a traction motor (10) powered by the battery cell arrangement (110).

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