Electrical single cell

Abstract

The invention relates to an electric single cell (100), wherein a housing (110) of the single cell (100) has a support structure (150) on at least one first end face (111), and the support structure (150) divides the first end face (111) at least in a defined area into at least two membrane areas (160 to 163) for a venting membrane and / or a burst membrane, the support structure (150) is designed as a contact point for an electrically conductive connection, the support structure (150) is arranged around the membrane areas (160 to 163) such that, in the event of a force acting on the housing (110) and / or the support structure (150), an acting force is completely absorbed by the support structure (150) and / or the housing (110) and / or is directed into areas outside the membrane areas (160 to 163), each membrane area (160 to 163) forming an edge of the support structure (150) facing bending edge (170 to 173) has,Each membrane area (160 to 163) has tear edges (180 to 183) in the area of ​​further edges of the supporting structure (150), and the tear edges (180 to 183) tear open when the venting membrane and / or bursting membrane is triggered, and the venting membrane and / or bursting membrane bends outwards at the at least one bending edge (170 to 173) and remains firmly connected to the first end face (111) and / or the supporting structure (150) in the area of ​​the bending edge (170 to 173).

Description

[0001] The invention relates to a single electrical cell.

[0002] From US 10 700 323 B2, a battery system is known comprising a frame surrounding an active battery area and defining a coolant channel, an inlet extending from a first section of the frame and terminating at the coolant channel, an outlet extending from a second section of the frame and terminating at the coolant channel, and a vent supported by the frame and located between the active battery area and the coolant channel, designed to discharge gas from the active battery area into the coolant channel when a pressure or temperature of the gas exceeds a predetermined threshold, and otherwise to isolate the active battery area from the coolant channel.

[0003] The invention is based on the objective of providing a novel electrical single cell.

[0004] The problem is solved according to the invention by an electrical single cell which has the features of claim 1.

[0005] Advantageous embodiments of the invention are the subject of the dependent claims.

[0006] In the electrical single cell according to the invention, a housing of the single cell has a support structure on at least one end face, and the end face and the support structure are firmly connected to the housing, wherein the support structure divides the end face at least in a defined area into at least two membrane areas for a venting membrane and / or a burst membrane, the support structure is designed as a contact point for an electrically conductive connection, the support structure is arranged around the membrane areas in such a way that, in the event of a force acting on the housing and / or the support structure, an acting force is completely absorbed by the support structure and / or the housing and / or is directed into areas outside the membrane areas, each membrane area has a bending edge facing an edge of the support structure.Each membrane area has tear edges in the area of ​​further edges of the supporting structure, and the tear edges tear open when the venting membrane and / or bursting membrane is triggered, and the venting membrane and / or bursting membrane bends outwards at at least one bending edge and remains firmly connected to the front face and / or the supporting structure in the area of ​​the bending edge.

[0007] The supporting structure ensures that the venting membrane and / or the bursting membrane remain attached to the housing and / or the supporting structure in the event of triggering of the venting membrane and / or bursting membrane by means of the bending edges, thereby increasing safety and preventing electrical short circuits caused by uncontrolled loose parts.

[0008] Furthermore, the force transmission prevents unwanted and uncontrolled triggering of the venting membrane and / or burst membrane in the event of a force being applied, for example from the outside and / or from the inside by a moving stack of cell films, such as a so-called jelly roll.

[0009] Furthermore, manufacturing with the supporting structure in the front face can be integrated into existing manufacturing processes with minimal effort using forming processes, for example by means of a stamping process, thus incurring no additional effort and / or additional costs.

[0010] Furthermore, the individual cells can be easily integrated into existing formats and processes.

[0011] Furthermore, the invention is particularly suitable for cylindrical single cells, for example with a housing made of aluminium or steel, in particular Hilumin.

[0012] Furthermore, the individual cell exhibits a high degree of flexibility regarding its cell size and / or dimensions.

[0013] Furthermore, the supporting structure increases mechanical stability and simultaneously serves for electrical power transmission.

[0014] Furthermore, the support structure is suitable for contacting a current collector and / or an electrode winding by means of laser beam welding.

[0015] Furthermore, the supporting structure enlarges the pole area and thus simplifies the electrical contacting of a plurality of individual cells with each other by means of a cell connector.

[0016] Furthermore, the individual cells can be easily integrated into new vehicle concepts and / or energy storage concepts.

[0017] Furthermore, the individual cells offer new design possibilities.

[0018] Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

[0019] This shows: Fig. 1 schematically a possible embodiment of a single cell, Fig. 2 schematically a possible embodiment of a first end face of the single cell according to Fig. 1, Fig. 3 schematically shows another possible embodiment of a first end face of the single cell according to Fig. 1, Fig. 4 schematically a section of the single cell according to Fig. 1 with triggered venting membrane and / or bursting membrane in two membrane regions, and Fig. 5 schematically further possible embodiments of a first end face of the single cell according to Fig. 1.

[0020] Corresponding parts are marked with the same reference symbols in all figures.

[0021] Fig. Figure 1 schematically shows a possible embodiment of a single cell 100 in a sectional view.

[0022] The single cell 100 comprises a housing 110, a first electrical pole 120, a second electrical pole 130, an electrode winding 140, a support structure 150 and four in Fig. 2 and Fig. Three membrane areas 160 to 163, each with a burst membrane, are shown in more detail.

[0023] The housing 110 is cylindrical around an axis extending in a vertical direction z and has a first end face 111 at a lower end of the housing 110 in the vertical direction z and a second end face 112 at a higher end of the housing 110 in the vertical direction z.

[0024] The electrode winding 140, which is also cylindrical around the axis running in the vertical direction z, is arranged in the housing 110.

[0025] The supporting structure 150 is formed on the first end face 111.

[0026] The first end face 111 and the support structure 150 are firmly connected to the housing 110 of the single cell 100. For example, the first end face 111, the support structure 150 and the housing 110 of the single cell 100 are formed in one piece, in particular as a one-piece homogeneous molded part without joints, and are formed by deep drawing.

[0027] The first and second electrical poles 120, 130 are arranged on the second end face 112.

[0028] The first electrical pole 120 has a first electrical polarity. The first electrical polarity is, for example, positive.

[0029] The second electrical pole 130 has a second electrical polarity that differs from the first electrical polarity. The second electrical polarity is, for example, negative.

[0030] The single cell 100 is designed as a so-called cylindrical cell with a cylindrical housing 110. The housing 110 is electrically conductive, and the second pole 130 is formed by the second end face 112. The first pole 120 is electrically insulated by the second end face 112 and thus by the second pole 130, which surrounds it in a ring-like manner.

[0031] Fig. Figure 2 schematically shows a possible embodiment of the first end face 111 of the single cell 100 according to Fig. 1 along the transverse direction x and longitudinal direction y.

[0032] The supporting structure 150 divides the first end face 111 in a defined area into at least two, in the illustrated example into four, membrane areas 160 to 163. Venting membranes and / or bursting membranes are arranged in the membrane areas 160 to 163.

[0033] The membrane areas 160 to 163 and / or the supporting structure 150 are formed, for example, by means of a forming process, such as embossing or stamping, in the first end face 111.

[0034] The support structure 150 is arranged around the membrane areas 160 to 163 in such a way that, in the event of a force acting on the housing 110 and / or the support structure 150, the acting force is completely absorbed by the support structure 150 and / or the housing 110 and / or is directed into areas outside the membrane areas 160 to 163.

[0035] Fig. Figure 3 schematically shows another possible embodiment of the first end face 111 of the single cell 100 according to Fig. 1.

[0036] The supporting structure 150 is electrically connected to a current collector and / or the electrode winding 140 by means of welds 155 and thus serves as a contact point for an electrically conductive connection, for example for contacting another single cell not shown in detail.

[0037] Each membrane area 160 to 163 has a bending edge 170 to 173 and a tearing edge 180 to 183.

[0038] The tear edges 180 to 183 tear open when the venting membrane and / or bursting membrane is triggered, and the respective venting membrane and / or bursting membrane bends outwards at the respective bending edge 170 to 173 and remains firmly connected to the end face 111 and / or the supporting structure 150 in the area of ​​the respective bending edge 170 to 173. This prevents the venting membrane and / or bursting membrane from completely detaching from the end face 111.

[0039] Fig. Figure 4 schematically shows a section of single cell 100 according to Fig. 1 with triggered venting membrane and / or burst membranes in the two membrane regions 160, 163 in a sectional view.

[0040] The illustration shows a triggered venting membrane and / or Best membrane in membrane areas 160 and 163. The respective tear edge 180, 183 of the membrane areas 160, 163 has been torn open by the triggering of the respective venting membrane and / or Best membrane, and the respective venting membrane and / or Best membrane has bent over at the respective bending edge 170, 173.

[0041] Fig. Figure 5 schematically shows two embodiments of the first end face 111 of the single cell 100 according to Fig. 1.

[0042] In the upper illustration, the front face 111 is divided into two membrane areas 160, 161 by means of the support structure 150, wherein the support structure 150 is electrically connected to the current collector and / or the electrode winding 140 of the single cell 100 by means of weld seams 155.

[0043] In the lower illustration, the front face 111 is divided into three membrane areas 160, 161, 162 by means of the support structure 150, wherein the support structure 150 is electrically connected to the current collector and / or the electrode winding 140 of the single cell 100 by means of weld seams 155.

[0044] In both embodiments, each membrane area 160, 161 or 160 to 162 has a bending edge 170, 171 or 170 to 172 and a tearing edge 180, 181 or 180 to 182. Reference symbol list 100 single cells 110 cases 111 first front 112 second front 120 first electrical pole 130 second electrical pole 140 electrode coils 150 supporting structure 155 weld seam 160 to 163 Membrane range 170 to 173 bending edge 180 to 183 Tear-off edge x transverse direction y longitudinal direction z Upward direction QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 10 700 323 B2

[0002]

Claims

[1] Single electric cell (100), characterized by , that a housing (110) of the single cell (100) has a supporting structure (150) on at least one first end face (111) and the first end face (111) and the supporting structure (150) are firmly connected to the housing (110), wherein - the supporting structure (150) the first end face (111) is subdivided at least in a defined area into at least two membrane areas (160 to 163) for a venting membrane and / or a bursting membrane, - the supporting structure (150) is designed as a contact point for an electrically conductive connection, - the supporting structure (150) is arranged around the membrane areas (160 to 163) in such a way that, in the event of a force acting on the housing (110) and / or the supporting structure (150), the acting force is completely absorbed by the supporting structure (150) and / or the housing (110) and / or is directed into areas outside the membrane areas (160 to 163), - each membrane area (160 to 163) has a bending edge (170 to 173) facing an edge of the supporting structure (150), - each membrane area (160 to 163) has tear edges (180 to 183) in the area of ​​further edges of the supporting structure (150) and - the tear edges (180 to 183) tear open when the venting membrane and / or bursting membrane is triggered, and the venting membrane and / or bursting membrane bends outwards at at least one bending edge (170 to 173) and remains firmly connected to the first end face (111) and / or the supporting structure (150) in the area of ​​the bending edge (170 to 173). [2] Single electric cell (100) according to claim 1, characterized by , that a current collector and / or an electrode winding (140) are electrically connected to the supporting structure (150) by means of welding. [3] Single electric cell (100) according to claim 1 or 2, characterized by, that the first end face (111), the supporting structure (150) and the housing (110) are formed in one piece and the membrane areas (160 to 163) and / or the supporting structure (150) are formed by means of a forming process of the first end face (111).

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