Convergence assembly and battery module

Abstract

The confluence assembly comprises a confluence plate and a limiting plate which are arranged in parallel along a first direction and are connected with each other, and the first direction is parallel to the extension direction of tabs of battery cell monomers; the bus plate comprises a plurality of first openings which penetrate through the bus plate in the first direction and extend in the second direction, and a plurality of first conductive blocks and a plurality of second conductive plates which are arranged on the side, facing the limiting plate, of the bus plate; each first conductive block is arranged between two adjacent first openings, and each second conductive plate is arranged on one side, in the third direction, of the corresponding first opening, extends in the third direction and partially protrudes out of the edge of the convergence plate; the limiting plate comprises a first limiting plate opening and a second limiting plate opening, and the first limiting plate opening corresponds to the first conductive block; the second limiting plate opening corresponds to the second conductive plate. According to the scheme, the metal bar is limited in a physical mode, the metal bar can be flexibly detached from the confluence plate and can be reused, and the cost can be reduced.

Description

Technical Field

[0001] This disclosure generally relates to the field of battery technology. More specifically, this disclosure relates to a busbar assembly and a battery module. Background Technology

[0002] Cell assembly refers to the process of assembling individual cells into a battery pack that can be used to supply power through a series of processes and procedures. In the cell assembly process, the cells are first tested and graded to ensure their quality and performance meet requirements. Next, the tested and graded cells are assembled to form battery packs. Then, multiple cells can be connected in series and parallel, along with auxiliary structural components that collect current, gather data, and provide structural protection, forming modular battery packs. After obtaining the modular battery packs, busbars are used to connect the cells or modules to collect and manage the current. These busbars can be integrated printed circuit boards (PCBs) or simple modules, responsible for collecting and outputting the current from the cells, ultimately forming a battery pack.

[0003] Busbars can be equipped with metal busbars for conductive connections within the battery pack. In mass production, existing busbars can be custom-made using molds, where the metal busbars are typically glued or welded to the busbar. However, in the prototype stage, custom mold production is costly due to the need to adjust the dimensions of the battery cells and / or the busbar itself. When the metal busbar is glued or welded to the busbar, it cannot be removed and reused if the busbar's dimensions need adjustment, further increasing the cost of busbar prototypes.

[0004] In view of this, there is an urgent need to provide a device for battery modules that physically limits the metal busbar, allowing the metal busbar to be flexibly removed from the busbar and reused, thereby reducing the cost in the sample stage. Utility Model Content

[0005] In order to at least address one or more of the technical problems mentioned above, this disclosure proposes a busbar assembly and battery module solution in several aspects.

[0006] In a first aspect, this disclosure provides a busbar assembly for connecting multiple individual battery cells of a battery module, including a busbar plate and a limiting plate arranged parallel to and interconnected along a first direction. The busbar plate and the limiting plate are sequentially disposed on one side of the individual battery cells in the first direction, which is parallel to the extension direction of the tabs of the individual battery cells. The busbar plate includes multiple first openings extending through the busbar plate along the first direction and extending along a second direction, and multiple first conductive blocks and multiple second conductive plates disposed on the side of the busbar plate facing the limiting plate. The first conductive blocks are disposed between two adjacent first openings. The second conductive plate is disposed on the side of the first opening in the third direction, extends along the third direction and partially protrudes from the edge of the busbar. The tab of the battery cell can pass through the first opening and connect with the first conductive block or the second conductive plate. The second direction and the third direction are respectively perpendicular to the extension direction of the tab of the battery cell and perpendicular to each other. The limiting plate includes a first limiting plate opening and a second limiting plate opening. The first limiting plate opening is disposed corresponding to the first conductive block and accommodates the first conductive block. The second limiting plate opening is disposed corresponding to the second conductive plate and partially accommodates the second conductive plate.

[0007] In some embodiments, the first limiting plate opening and the second limiting plate opening respectively penetrate the limiting plate along the first direction, and the second limiting plate opening penetrates the edge of the limiting plate along the third direction, and the second conductive plate portion is accommodated in the second limiting plate opening and protrudes from the edge of the limiting plate along the third direction.

[0008] In some embodiments, the second conductive plate is configured as a first stepped shape or a first convex shape, and the opening of the second limiting plate is configured as a second stepped shape or a second convex shape opposite to the first stepped shape or the first convex shape.

[0009] In some embodiments, the busbar assembly further includes a cover plate that is parallel to and connected to the limiting plate along the first direction. The cover plate is disposed on the side of the limiting plate away from the busbar. The cover plate includes a first cover plate opening and a second cover plate opening. The first cover plate opening is disposed opposite to the first limiting plate opening, and its projected area in the first direction is smaller than the projected area of ​​the first limiting plate opening, for limiting the first conductive block in the first direction. The second cover plate opening is disposed opposite to the second limiting plate opening, and its projected area in the first direction is smaller than the projected area of ​​the second limiting plate opening, for limiting the second conductive block in the first direction.

[0010] In some embodiments, the busbar assembly further includes a connector, wherein the busbar plate, the limiting plate, and the cover plate are respectively provided with connecting holes spaced apart circumferentially and corresponding to each other, and the connector connects the three through the connecting holes.

[0011] In some embodiments, the first conductive block and the first limiting plate opening extend along the second direction, and the extension length of the first limiting plate opening is greater than or equal to the extension length of the first conductive block. The first limiting plate opening accommodates the first conductive block for limiting the first conductive block and making the first conductive block adjustable along the second direction within the first limiting plate opening.

[0012] In some embodiments, the opening of the first limiting plate is recessed on both sides in the second direction to form a notch, and the two sides of the notch abut against the side of the first conductive block.

[0013] In some embodiments, the busbar assembly further includes a data acquisition line disposed on the side of the cover plate away from the limiting plate. The first conductive block and the second conductive plate are respectively provided with line connection holes. The data acquisition line is electrically connected to the individual battery cell through the line connection holes for monitoring the individual battery cell.

[0014] In some embodiments, the device further includes a data acquisition line, and a groove is provided on a first side of the cover plate, the data acquisition line being disposed in the groove for monitoring the battery module.

[0015] In a second aspect, this disclosure provides a battery module including a plurality of individual battery cells and a busbar assembly as described in any one of the first aspects, wherein the plurality of individual battery cells are assembled into the battery module via the busbar assembly.

[0016] With the current collector assembly and battery module provided above, the metal busbar can be physically restricted during the sample stage. The metal busbar can be flexibly removed from the current collector and reused, which can reduce costs. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0018] Figure 1a An exploded view of a bus component according to some embodiments of this disclosure is shown;

[0019] Figure 1bAn exploded view of a bus component according to other embodiments of this disclosure is shown;

[0020] Figure 2a An exemplary structural diagram of the second limiting plate opening according to some embodiments of this disclosure is shown;

[0021] Figure 2b An exemplary structural diagram of a second conductive plate according to some embodiments of this disclosure is shown;

[0022] Figure 2c An exemplary structural diagram of the second limiting plate opening according to other embodiments of this disclosure is shown;

[0023] Figure 2d An exemplary structural diagram of a second conductive plate according to other embodiments of this disclosure is shown;

[0024] Figure 3a A top view of a busbar assembly including a cover plate is shown, representing some embodiments of this disclosure.

[0025] Figure 3b An exploded view of a busbar assembly including a cover plate, according to some embodiments of this disclosure, is shown;

[0026] Figure 4a A top view of a busbar assembly with the cover removed, according to some embodiments of this disclosure, is shown;

[0027] Figure 4b An exploded view of a busbar assembly with the cover removed, according to some embodiments of this disclosure, is shown.

[0028] Figure 4c A partial cross-sectional view of a busbar assembly with the cover removed, according to some embodiments of this disclosure, is shown.

[0029] Figure 5 A partially enlarged view of the first limiting plate opening of some embodiments of this disclosure is shown.

[0030] Tag Name

[0031] 10 - Busbar, 11 - First opening, 12 - First conductive block, 121 - First conductive side, 122 - Second conductive side, 13 - Second conductive plate, 131 - First side, 132 - Second side, 135 - Fifth side, 136 - Sixth side, 20 - Limiting plate, 21 - First limiting plate opening, 211 - First side of opening, 212 - Notch, 2121 - Notch sidewall, 2122 - Notch bottom edge, 22 - Second limiting plate 221 - Second side of the opening, 223 - Third side, 224 - Fourth side, 227 - Seventh side, 228 - Eighth side, 30 - Third limiting block, 301 - First connecting part, 302 - Second connecting part, 303 - Third limiting body, 31 - First area, 32 - Second area, 40 - Cover plate, 41 - First cover plate opening, 42 - Second cover plate opening, 50 - Battery cell, 60 - Connector, 61 - Connecting hole. Detailed Implementation

[0032] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0033] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0034] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0035] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0036] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0037] Figure 1a An exploded view of a bus component according to some embodiments of this disclosure is shown. Figure 1b An exploded view of a bus assembly according to other embodiments of this disclosure is shown. It should be understood that the first direction, second direction, and third direction mentioned below are all directions shown in the figures. The aforementioned first direction, second direction, and third direction can all be the direction of the arrow in the figure and the direction opposite to the arrow. The two ends of the aforementioned first direction can be divided into upper and lower sides, the two ends of the aforementioned second direction can be divided into left and right sides, and the two ends of the aforementioned third direction can be divided into front and rear sides.

[0038] like Figure 1a and Figure 1b As shown, the busbar assembly includes a busbar plate 10 and a limiting plate 20 arranged parallel to each other along a first direction and interconnected. The busbar plate 10 and the limiting plate 20 are sequentially disposed on one side of the battery cell in the first direction, which is parallel to the extension direction of the battery cell's tab. The busbar plate 10 includes a plurality of first openings 11 extending through the busbar plate 10 along the first direction and extending along a second direction. A plurality of first conductive blocks 12 and a plurality of second conductive plates 13 are disposed on the side of the busbar plate 10 facing the limiting plate 20. The first conductive blocks 12 are disposed between two adjacent first openings 11, and the second conductive plates 13 are disposed between the first and second openings 11. An opening 11 is located on one side of the third direction and extends along the third direction, partially protruding from the edge of the busbar 10. The tab of the battery cell can be connected to the first conductive block 12 or the second conductive plate 13 through the first opening 11. The second direction and the third direction are perpendicular to the extension direction of the tab of the battery cell and to each other. The limiting plate 20 includes a first limiting plate opening 21 and a second limiting plate opening 22. The first limiting plate opening 21 is provided corresponding to the first conductive block 12 and accommodates the first conductive block 12. The second limiting plate opening 22 is provided corresponding to the second conductive plate 13 and partially accommodates the second conductive plate 13.

[0039] In some embodiments, see also Figure 4bThe aforementioned battery module may include individual battery cells, and each individual battery cell may have a tab formed on its side. The tab extends in a first direction. The aforementioned busbar 10 and the aforementioned limiting plate 20 may be perpendicular to the first direction, and it is understood that the aforementioned busbar 10 and the aforementioned limiting plate 20 may be arranged parallel to each other along the first direction. In some embodiments, the aforementioned busbar 10 may have a plurality of mutually parallel first openings 11, wherein, in a second direction, the aforementioned first openings 11 may penetrate the aforementioned busbar 10. It is understood that the aforementioned first openings 11 may extend along the second direction. In some embodiments, the aforementioned busbar 10 and the aforementioned limiting plate 20 may be located on the same side of the individual battery cell in the first direction.

[0040] In some embodiments, the projection of the aforementioned first opening 11 in the first direction can be rectangular, and the size of the aforementioned first opening 11 can be larger than the size of the electrode tab, so that the aforementioned electrode tab can pass through the aforementioned first opening 11. In some embodiments, the aforementioned plurality of first openings 11 can be arranged in an array, for example, in two columns. It is understood that the distance between two adjacent first openings 11 can be determined according to the thickness between the individual battery cells. Foam can be disposed between the aforementioned individual battery cells, and a battery cell module can be obtained by stacking the aforementioned individual battery cells and foam in sequence, and then the aforementioned battery cell module can be fixed together with fiberglass tape.

[0041] It is important to understand that the aforementioned foam serves as insulation and buffer between battery cells. When a cell undergoes thermal expansion and contraction, the foam absorbs and buffers the resulting stress, preventing the accumulation of internal stress. Simultaneously, in the event of thermal runaway in a cell, the flame-retardant properties of the foam can prevent heat transfer, reducing the risk of fire. The aforementioned fiberglass tape provides insulation and fixation for the cell. In some embodiments, during the manufacturing of lithium battery cells, tape-automated bonding (TAB) can be welded onto the tabs to lengthen them, facilitating sealing with sealant during the top-side sealing process. After welding, weld points will appear on the tabs. Since the tab extension height may not meet requirements, bending is generally necessary. This can easily lead to short circuits; therefore, insulating tape can be applied to the welded areas.

[0042] It is understandable that the aforementioned tabs can extend upwards and emerge from the aforementioned plurality of first openings 11.

[0043] In some embodiments, the aforementioned first conductive block 12 and second conductive plate 13 can be copper busbars, and the aforementioned first conductive block 12 and the aforementioned second conductive plate 13 can be disposed on the side of the busbar 10 facing the limiting plate 20. When the aforementioned electrode tab passes through the aforementioned first opening 11 in the first direction, it can be connected to the aforementioned first conductive block 12 or the aforementioned second conductive plate 13. In some embodiments, the projection of the aforementioned first conductive block 12 in the first direction can be rectangular, and the projection of the aforementioned second conductive plate 13 in the first direction can be stepped or convex.

[0044] In some embodiments, see Figure 1a and Figure 1b The aforementioned first conductive block 12 can be disposed between the two first openings 11. When the aforementioned tab extends from the aforementioned first opening 11, it can be easily bent onto the aforementioned first conductive block 12, thus preparing for subsequent tab welding onto the first conductive block 12. The aforementioned second conductive plate 13 can be disposed on one side of the first opening 11 in a third direction, and can extend along the third direction and partially protrude from the edge of the busbar 10. Specifically, one side of the aforementioned second conductive plate 13 can be disposed on the side of the first opening 11. When the aforementioned tab passes through the aforementioned first opening 11, it can be bent onto the aforementioned second conductive plate 13 and connected to the aforementioned second conductive plate 13. In some embodiments, the other side of the aforementioned second conductive plate 13 can extend toward the side of the aforementioned busbar 10 and extend to the outside of the side of the aforementioned busbar 10, thereby facilitating connection to the outside, so as to collect and transmit the electrical energy of the battery module to the external load or the power grid.

[0045] The aforementioned second conductive plate 13 can be a master copper busbar, which serves as the final output copper busbar that collects the current from all battery modules, transmitting the electrical energy of the battery modules to an external load or the power grid. It's important to understand that this master copper busbar can carry the total current of the entire battery system or battery pack, thus requiring a large cross-sectional area to meet the demands of high current transmission. In contrast, the series copper busbar carries the current of a single module or a portion of the individual battery cells. Compared to the master copper busbar, its cross-sectional area can be smaller, but it must still meet the current carrying requirements of the individual battery cells connected in series within the module. It is understandable that the dimensions of the master copper busbar can differ from those of the series copper busbar to meet different current requirements.

[0046] In some embodiments, the aforementioned limiting plate 20 may be connected to the busbar 10 in a first direction. The aforementioned limiting plate 20 may include a plurality of first limiting plate openings 21, which may be disposed opposite to the first conductive block 12 along the first direction. The shape of the aforementioned first limiting plate opening 21 may correspond to the shape of the aforementioned first conductive block 12. Specifically, the axis of symmetry of the aforementioned first limiting plate opening 21 may coincide with the axis of symmetry of the aforementioned first conductive block 12.

[0047] In some embodiments, the aforementioned first limiting plate opening 21 can accommodate the aforementioned first conductive block 12. In the second direction, the size of the aforementioned first limiting plate opening 21 can be equal to the size of the first conductive block 12. When the aforementioned first conductive block 12 is placed between the aforementioned two adjacent first openings 11, after the aforementioned limiting plate 20 is connected to the aforementioned busbar 10, the aforementioned first conductive block 12 can be located inside the aforementioned first limiting plate opening 21 and can extend out of the aforementioned first limiting plate opening 21 in the first direction. It is understood that when the size of the aforementioned first limiting plate opening 21 in the second direction is equal to the size of the first conductive block 12, the aforementioned first conductive block 12 can be limited.

[0048] In some embodiments, the aforementioned second limiting plate opening 22 may be disposed opposite to the aforementioned second conductive plate 13 along a first direction, and the shape of the aforementioned second limiting plate opening 22 may correspond to the shape of the aforementioned second conductive plate 13. Specifically, in the first direction, the shape of the aforementioned second conductive plate 13 may be stepped or convex, and the aforementioned second limiting plate opening 22 may be the corresponding stepped or convex shape. It should be understood that the aforementioned second limiting plate opening 22 may accommodate at least a portion of the aforementioned second conductive plate 13. In some embodiments, the first side 211 of the opening of the aforementioned first limiting plate opening 21 abuts against the first conductive side 121 of the first conductive block 12. Specifically, the first side 211 of the opening of the aforementioned first limiting plate opening 21 may be the side of the first limiting plate opening 21 perpendicular to the second direction, and the first conductive side 121 of the aforementioned first conductive block 12 may be the side of the first conductive block 12 perpendicular to the second direction. It is understood that when the first side 211 of the aforementioned opening abuts against the first conductive side 121, the aforementioned first limiting plate opening 21 can restrict the first conductive block 12 in the second direction.

[0049] In some embodiments, the second side 221 of the opening 22 of the second limiting plate can be the side of the second limiting plate opening 22 perpendicular to the second direction, and the second conductive side 122 of the second conductive plate 13 can be the side of the second conductive plate 13 perpendicular to the second direction. It is understood that when the second side 221 of the opening abuts against the second conductive side 122, the second limiting plate opening 22 can restrict the second conductive plate 13 in the second direction.

[0050] In some embodiments, the aforementioned first limiting plate opening 21 and second limiting plate opening 22 respectively penetrate the limiting plate 20 along the first direction, and the second limiting plate opening 22 penetrates the edge of the limiting plate 20 along the third direction, and the second conductive plate 13 is partially accommodated in the second limiting plate opening 22 and protrudes from the edge of the limiting plate 20 along the third direction.

[0051] It is understood that the aforementioned first limiting plate opening 21 and second limiting plate opening 22 can respectively penetrate the limiting plate 20 along the first direction, so that the tabs of multiple battery cells can respectively penetrate the aforementioned first limiting plate opening 21 and second limiting plate opening 22. The aforementioned second limiting plate opening 22 can penetrate the edge of the limiting plate 20 along a third direction. When the aforementioned second conductive plate 13 is disposed at least partially within the second limiting plate opening 22, the side of the second conductive plate 13 can extend along a third direction and protrude from the edge of the limiting plate 20, thereby facilitating the connection of the second conductive plate 13 with external circuitry.

[0052] By setting the aforementioned busbar assembly, the metal busbar can be physically restricted, allowing it to be flexibly removed from the busbar 10 and reused, thereby reducing the cost of the sample stage.

[0053] Figure 2a An exemplary structural diagram of the second limiting plate opening according to some embodiments of this disclosure is shown; Figure 2b An exemplary structural diagram of a second conductive plate according to some embodiments of this disclosure is shown; Figure 2c An exemplary structural diagram of the second limiting plate opening according to other embodiments of this disclosure is shown; Figure 2d An exemplary structural diagram of a second conductive plate according to other embodiments of this disclosure is shown. Figure 2a - Figure 2d As shown, the second conductive plate 13 is configured as a first stepped shape or a first convex shape, and the second limiting plate opening 22 is configured as a second stepped shape or a second convex shape opposite to the first stepped shape or the first convex shape.

[0054] In some embodiments, the aforementioned second limiting plate opening 22 may be disposed opposite to the aforementioned second conductive plate 13. Specifically, in the first direction, the shape of the aforementioned second conductive plate 13 may be stepped or convex, and the aforementioned second limiting plate opening 22 may be the corresponding stepped or convex shape.

[0055] Specifically, see Figure 2a -2b, When the aforementioned second conductive plate 13 is a first trapezoidal shape, it may include a first side 131 parallel to the second direction and a second side 132 parallel to the third direction. The aforementioned second limiting plate opening 22 may be a second trapezoidal shape, which may have a third side 223 parallel to the second direction and a fourth side 224 parallel to the third direction. The aforementioned first side 131 may abut against the third side 223, and the aforementioned second side 132 may abut against the fourth side 224, thereby limiting the aforementioned second conductive plate 13.

[0056] In some embodiments, see Figure 2c -2d, when the aforementioned second conductive plate 13 is a first convex shape, it may include a fifth side 135 parallel to the second direction and a sixth side 136 parallel to the third direction. The aforementioned second limiting plate opening 22 may be a second convex shape, which may have a seventh side 227 parallel to the second direction and an eighth side 228 parallel to the third direction. The aforementioned fifth side 135 may abut against the seventh side 227, and the aforementioned sixth side 136 may abut against the eighth side 228, thereby limiting the aforementioned second conductive plate 13.

[0057] Figure 3a A top view of a busbar assembly including a cover plate, according to some embodiments of this disclosure, is shown. Figure 3b An exploded view of a busbar assembly including a cover plate, representing some embodiments of this disclosure, is shown. Figure 3a and Figure 3b As shown, the device further includes a cover plate 40 that is parallel to and connected to the limiting plate 20 along the first direction. The cover plate 40 is located on the side of the limiting plate 20 away from the busbar 10. The cover plate 40 includes a first cover plate opening 41 and a second cover plate opening 42. The first cover plate opening 41 is opposite to the first limiting plate opening 21, and its projected area in the first direction is smaller than that of the first limiting plate opening 21, and is used to limit the first conductive block 12 in the first direction. The second cover plate opening 42 is opposite to the second limiting plate opening 22, and its projected area in the first direction is smaller than that of the second limiting plate opening 22, and is used to limit the second conductive plate 13 in the first direction.

[0058] It is understood that the dotted line portion in the figure can represent the portion obscured by the aforementioned cover plate 40. Specifically, the aforementioned cover plate 40 can be perpendicular to the aforementioned first direction, and the aforementioned cover plate 40 can be arranged parallel to the aforementioned limiting plate 20 along the first direction. Further, the aforementioned cover plate 40 can be disposed on the side of the limiting plate 20 opposite to the busbar 10, and it is understood that the aforementioned limiting plate 20 can be located between the busbar 10 and the cover plate 40. In some embodiments, the aforementioned first cover plate opening 41 can be disposed opposite to the first limiting plate opening 21, and the centerline of the aforementioned first cover plate opening 41 can coincide with the centerline of the first limiting plate opening 21.

[0059] In some embodiments, in the third direction, the size of the first cover plate opening 41 may be larger than the size of the first limiting plate opening 21; in the second direction, the size of the first cover plate opening 41 may be larger than the size of the first opening 11, so that the electrode tab can pass through the first opening 11, the first limiting plate opening 21 and the first cover plate opening 41.

[0060] In some embodiments, in the second direction, the size of the first cover plate opening 41 can be smaller than the size of the first conductive block 12. It is understood that the projected area of ​​the first cover plate opening 41 in the first direction can be smaller than the projected area of ​​the first limiting plate opening 21 in the first direction, so that the first cover plate opening 41 can squeeze the first conductive block 12 in the first direction, thereby achieving the purpose of limiting in the first direction.

[0061] In some embodiments, see Figure 3a and Figure 3b Viewed from the first direction, the aforementioned first opening 11 is located inside the aforementioned second cover plate opening 42, allowing the aforementioned electrode tab to pass through the aforementioned first opening 11 and the second cover plate opening 42. It is understood that when the aforementioned second cover plate opening 42 at least partially overlaps with the aforementioned second limiting plate opening 22 in the first direction, and the projected area of ​​the second cover plate opening 42 in the first direction is smaller than the projected area of ​​the second limiting plate opening 22, the aforementioned cover plate 40 can compress the aforementioned second conductive plate 13, thereby limiting the second conductive plate 13 in the first direction.

[0062] In some embodiments, the busbar assembly further includes a connector 60, wherein the busbar plate 10, the limiting plate 20, and the cover plate 40 are respectively provided with connecting holes 61 that are spaced apart circumferentially and correspond one to one, and the connector 60 connects the three through the connecting holes 61.

[0063] In some embodiments, the aforementioned connection hole 61 may include a first mounting hole, a second mounting hole, and a third mounting hole. Specifically, the aforementioned busbar 10 may be provided with a first mounting hole, the aforementioned limiting plate 20 may be provided with a second mounting hole, and the aforementioned cover plate 40 may be provided with a third mounting hole. The centers of the aforementioned first mounting hole, second mounting hole, and third mounting hole may be on the same straight line parallel to the first direction. The aforementioned connector 60 may pass through the aforementioned first mounting hole, second mounting hole, and third mounting hole and detachably connect the aforementioned busbar 10, limiting plate 20, and cover plate 40 together.

[0064] By setting the cover plate 40, the first conductive block 12 and / or the second conductive plate 13 can be limited in the first direction, which can avoid the welding offset caused by the change in position of the first conductive block 12 and / or the second conductive plate 13 during welding.

[0065] In some embodiments, the tab extends through the first opening 11, the first limiting plate opening 21, and the first cover plate opening 41, and is bent on the first side of the first conductive block 12; and / or the tab extends through the first opening 11, the second limiting plate opening 22, and the second cover plate opening 42, and is bent on the first side of the second conductive plate 13.

[0066] In some embodiments, the dimensions of the aforementioned first opening 11, first limiting plate opening 21, and first cover plate opening 41 can be set according to the dimensions of the electrode tab. Specifically, in the second direction and the third direction, the dimensions of the aforementioned first opening 11, first limiting plate opening 21, and first cover plate opening 41 can be larger than the dimensions of the aforementioned electrode tab, so that the aforementioned electrode tab can pass through the aforementioned first opening 11, first limiting plate opening 21, and first cover plate opening 41, and can be bent on the first side of the second conductive plate 13, which can ensure that the current of the multiple battery cells 50 can be effectively collected and transmitted.

[0067] Figure 4a A top view of a busbar assembly with the cover removed, according to some embodiments of this disclosure, is shown. Figure 4b An exploded view of a busbar assembly with the cover removed, according to some embodiments of this disclosure, is shown. Figure 4c A partial cross-sectional view of a busbar assembly with a cover plate removed, according to some embodiments of this disclosure, is shown. Figure 4a , Figure 4b and Figure 4c As shown, in some embodiments, the aforementioned busbar assembly may include a busbar plate 10 and a limiting plate 20. The busbar plate 10 may be provided with a first conductive block 12 and a second conductive plate 13. The limiting plate 20 may be provided with a first limiting plate opening 21 and a second limiting plate opening 22. It is understood that, in the first direction, the aforementioned battery cell 50 may be disposed on the side of the busbar plate 10 away from the aforementioned limiting plate 20. The tab of the aforementioned battery cell 50 may penetrate through the aforementioned first opening 11 and the aforementioned first limiting plate opening 21.

[0068] In some embodiments, the busbar assembly further includes a third limiting block 30, and the first conductive block 12 includes a first region 31 and a second region 32 on the side facing the limiting plate 20; the first region 31 is located at the middle position of the first conductive block 12 along the second direction, and the second region 32 is located at both ends of the first conductive block 12 along the second direction, wherein the tab can be bent on the first region 31 of the first conductive block 12; the third limiting block 30 is connected to the first opening 11 and abuts against the second region 32 of the first conductive block 12.

[0069] In some embodiments, the aforementioned third limiting block 30 may be disposed on the limiting plate 20, and may have a certain height. Specifically, as... Figure 4cAs shown, viewed from the second direction, the shape of the aforementioned third limiting block 30 can be set as an arch shape. The aforementioned third limiting block 30 may include a first connecting portion 301 and a second connecting portion 302 parallel to the first direction, and the first connecting portion 301 and the second connecting portion 302 may be respectively disposed on both sides of the opening 21 of the first limiting plate in the second direction. The aforementioned third limiting block 30 may also include a third limiting body 303 parallel to the third direction, one end of which may be connected to the first connecting portion 301, and the other end of which may be connected to the second connecting portion 302. It is understood that in the first direction, the aforementioned third limiting body 303 may contact the side of the aforementioned first conductive block 12 facing the limiting plate 20, thereby limiting the aforementioned first conductive block 12 in the first direction.

[0070] In some embodiments, such as Figure 4a As shown, in the first direction, the projection of the aforementioned third limiting block 30 onto the first conductive block 12 can be on the second region, and the projection of the aforementioned tab bending onto the first conductive block 12 can be on the first region 31. It is understood that the aforementioned first region 31 and the aforementioned second region 32 may not overlap, which can avoid the interference of the third limiting block 30 on the bending of the tab, so that the tab bends onto the third limiting block 30 and cannot bend onto the first conductive block 12.

[0071] In some embodiments, the first conductive block 12 and the first limiting plate opening 21 are respectively extended along the second direction, and the extension length of the first limiting plate opening 21 is greater than or equal to the extension length of the first conductive block 12. The first limiting plate opening 21 accommodates the first conductive block 12 for limiting the first conductive block 12 and making the first conductive block 12 adjustable along the second direction within the first limiting plate opening 21.

[0072] In some embodiments, in the second direction, the size of the first limiting plate opening 21 may be greater than or equal to the size of the first conductive block 12, thereby allowing the first conductive block 12 to be accommodated within the first limiting plate opening 21. In the second direction, when the size of the first limiting plate opening 21 is greater than the size of the first conductive block 12, the first conductive block 12 can be adjusted within the first limiting plate opening 21 along the second direction. Further, the first limiting plate opening 21 may be provided with a movable baffle in the second direction. Before installing the limiting plate 20 onto the busbar 10, the first limiting plate opening 21 can be opened to facilitate installation. After the limiting plate 20 is installed on the busbar 10, the baffle can move along the second direction, thereby clamping the first conductive block 12 on both sides in the second direction to achieve limiting in the second and third directions.

[0073] By setting the opening 21 of the first limiting plate as described above, the first conductive block 12 can be limited, which can avoid the welding offset caused by the change of position of the first conductive block 12 during welding.

[0074] Figure 5 A partially enlarged view of the opening of the first limiting plate according to some embodiments of this disclosure is shown; as follows: Figure 5 As shown, the opening 21 of the first limiting plate is recessed on both sides in the second direction to form a notch 212, and the two sides of the notch 212 abut against the side of the first conductive block 12.

[0075] In some embodiments, the aforementioned first limiting plate opening 21 may form a recess 212, which may include a recess sidewall 2121 parallel to the second direction and a recess bottom edge 2122 parallel to the third direction. The aforementioned first conductive block 12 may be embedded in the aforementioned recess 212, and the aforementioned recess sidewall 2121 may abut against the side of the first conductive block 12, thereby limiting the first conductive block 12 in the third direction. The aforementioned recess bottom edge 2122 may abut against the bottom edge of the first conductive block 12, thereby limiting the first conductive block 12 in the second direction.

[0076] In some embodiments, the device further includes a comb-shaped plate parallel to the manifold 10, the tabs passing through the comb-shaped plate, the comb-shaped plate being connected to a second side of the manifold 10 for supporting the manifold 10.

[0077] In some embodiments, the second side of the aforementioned busbar 10 can be the side of the busbar 10 facing away from the limiting plate 20 in the first direction, and the aforementioned busbar 10 can be connected to the comb plate. The aforementioned comb plate can be provided with multiple openings, allowing the tabs to pass through the openings and continue through the busbar 10, the limiting plate 20, and the cover plate 40. It is understood that when the aforementioned tabs need to be bent and welded to the first side of the first conductive block 12, a force needs to be generated on the aforementioned first conductive block 12 in the second direction, in a direction away from the third limiting block 30, and the aforementioned busbar 10 can generate a force in a direction away from the third limiting block 30. The aforementioned comb plate can be a plate with a certain rigidity, which can generate a force on the busbar 10 in a direction toward the third limiting block 30, and can support the aforementioned busbar 10.

[0078] By designing the dressing plate, welding deformation caused by displacement of the first conductive block 12 during electrode welding can be avoided.

[0079] In some embodiments, the busbar assembly further includes a data acquisition line disposed on the side of the cover plate 40 away from the limiting plate 20. The first conductive block 12 and the second conductive plate 13 are respectively provided with line connection holes. The data acquisition line is electrically connected to the battery cell 50 through the line connection holes for monitoring the battery cell.

[0080] In some embodiments, a groove is provided on the first side of the cover plate 40, and the acquisition line is disposed in the groove for monitoring the battery module.

[0081] In some embodiments, the first side of the aforementioned cover plate 40 can be the side of the cover plate 40 facing away from the limiting plate 20, and the aforementioned voltage acquisition line can be connected to the first conductive block 12 and the second conductive plate 13. Specifically, the aforementioned acquisition line can pass through the aforementioned line connection hole, thereby enabling connection with the first conductive block 12 and the second conductive plate 13, and ultimately achieving electrical connection with the battery cell 50, enabling voltage monitoring, so that the battery management system can understand the battery's operating status (e.g., whether the battery is fully charged, whether it needs charging, and whether there is a risk of over-discharge or over-charge).

[0082] In some embodiments, the busbar 10 is made of an insulating material. Preferably, the busbar 10 can be made of epoxy resin, which, in addition to having good insulation properties, has a low curing shrinkage rate, helping to maintain the dimensional stability of the busbar 10 and reducing internal stress and deformation caused by shrinkage. It is understood that the limiting plate 20 and the cover plate 40 can also be made of insulating material, and can also be made of epoxy resin. The cover plate 40 can isolate the metal components inside the busbar 10 from the outside, preventing short circuits.

[0083] This disclosure also provides a battery module comprising multiple individual battery cells and a busbar assembly as described above, wherein the multiple individual battery cells are assembled into the battery module via the busbar assembly. In the sample stage, due to the high cost of custom mold making, the aforementioned battery module design allows for physical restraint of the metal busbars, thereby reducing costs.

[0084] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A busbar assembly for connecting a plurality of cell monoblocs of a battery module, characterized by, The current collecting assembly comprises a busbar (10) and a limiting plate (20), the busbar (10) and the limiting plate (20) are arranged in parallel along a first direction and are connected with each other, the busbar (10) and the limiting plate (20) are arranged on one side of the battery cell in the first direction in sequence, and the first direction is parallel to the extending direction of the tab of the battery cell. The busbar (10) comprises a plurality of first openings (11) penetrating the busbar (10) along the first direction and extending along a second direction, a plurality of first conductive blocks (12) arranged on the side of the busbar (10) facing the limiting plate (20), and a plurality of second conductive plates (13); the first conductive block (12) is arranged between two adjacent first openings (11), the second conductive plate (13) is arranged on one side of the first opening (11) in a third direction, extends along the third direction and partially protrudes from the edge of the busbar (10), the tab of the battery cell can pass through the first opening (11) and be connected with the first conductive block (12) or the second conductive plate (13), and the second direction and the third direction are perpendicular to the extending direction of the tab of the battery cell and perpendicular to each other. The limiting plate (20) comprises a first limiting plate opening (21) and a second limiting plate opening (22), the first limiting plate opening (21) is arranged corresponding to the first conductive block (12) and accommodates the first conductive block (12); the second limiting plate opening (22) is arranged corresponding to the second conductive plate (13) and partially accommodates the second conductive plate (13).

2. The busbar assembly of claim 1, wherein, The first limiting plate opening (21) and the second limiting plate opening (22) penetrate the limiting plate (20) along the first direction respectively, and the second limiting plate opening (22) penetrates the edge of the limiting plate (20) along the third direction, and the second conductive plate (13) is partially accommodated in the second limiting plate opening (22) and protrudes from the edge of the limiting plate (20) along the third direction.

3. The busbar assembly of claim 1, wherein, The second conductive plate (13) is arranged in a first stepped shape or a first convex shape, and the second limiting plate opening (22) is arranged in a second stepped shape or a second convex shape opposite to the first stepped shape or the first convex shape.

4. The busbar assembly of claim 1, wherein, The current collecting assembly further comprises a cover plate (40) arranged in parallel along the first direction and connected with the limiting plate (20), the cover plate (40) is arranged on the side of the limiting plate (20) away from the busbar (10), and the cover plate (40) comprises a first cover plate opening (41) and a second cover plate opening (42); The first cover plate opening (41) is arranged opposite to the first limiting plate opening (21), the projection area in the first direction is smaller than the projection area of the first limiting plate opening (21), and the first conductive block (12) is limited in the first direction; The second cover plate opening (42) is arranged opposite to the second limiting plate opening (22), the projection area in the first direction is smaller than the projection area of the second limiting plate opening (22), and the second conductive plate (13) is limited in the first direction.

5. The busbar assembly of claim 4, wherein, The bus assembly further comprises a connecting piece (60), the bus plate (10), the limiting plate (20) and the cover plate (40) are respectively provided with connecting holes (61) which are circumferentially spaced and one-to-one corresponding, and the connecting piece (60) is connected with the three through the connecting holes.

6. The busbar assembly of claim 1, wherein, The first conductive block (12) and the first limiting plate opening (21) are respectively arranged along the second direction, and the extension length of the first limiting plate opening (21) is greater than or equal to the extension length of the first conductive block (12), the first conductive block (12) is accommodated in the first limiting plate opening (21), used for limiting the first conductive block (12), and the first conductive block (12) is adjustable in the first limiting plate opening (21) along the second direction.

7. The busbar assembly of claim 1, wherein, The first limiting plate opening (21) is recessed on both sides in the second direction to form notches (212), and the two sides of the notches (212) abut against the sides of the first conductive block (12).

8. The busbar assembly of claim 4, wherein, The bus assembly further comprises a collection line, the collection line is arranged on the side of the cover plate (40) away from the limiting plate (20), the first conductive block (12) and the second conductive plate (13) are respectively provided with line connection holes, the collection line is electrically connected with the battery monomer through the line connection holes, and the battery monomer is monitored.

9. The busbar assembly of claim 8, wherein, The first side of the cover plate (40) is provided with a groove, and the collection line is arranged in the groove, used for monitoring the battery module.

10. A battery module, characterized by The battery module comprises a plurality of battery monomers and the bus assembly as claimed in any one of claims 1-9, and the plurality of battery monomers are assembled into the battery module through the bus assembly.

Images