Battery plug-in box

Abstract

The invention discloses a battery plug-in box. The battery plug-in box comprises a box body, a first connecting piece, a second connecting piece and a plurality of battery modules, wherein the first connecting piece, the second connecting piece and the battery modules are located in the box body. Wherein the plurality of battery modules are arranged along a first direction and a second direction, and the first direction is the arrangement direction of the plurality of battery monomers in the battery modules. The plurality of battery modules are connected in series through the first connecting piece and the second connecting piece, and the extension direction of the first connecting piece is parallel to the first direction, so that the extension direction of the first connecting piece is the same as the arrangement direction of the plurality of battery monomers. Therefore, the size of the first connecting piece can be small, the arrangement tightness of the plurality of battery modules in the first direction can be improved, the energy density of the battery plug-in box can be improved, the stability of the first connecting piece when the battery plug-in box is subjected to external impact or extrusion can be improved, and the reliability of the battery plug-in box can be improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery plug-in box. Background Art

[0002] The battery box is an energy storage device.

[0003] The battery plug-in box includes: a connector and multiple battery modules. The connector is located between two adjacent battery modules, and the connector can be connected to the transmission row of the battery module, so that multiple battery modules can be connected in series and parallel to increase the capacity of the battery module.

[0004] However, the span between the transmission rows in the above-mentioned battery plug-in box is relatively large, resulting in poor stability of the connector and thus poor reliability of the battery plug-in box. Summary of the Invention

[0005] The present application provides a battery plug box. The technical solution is as follows: The battery plug box includes: a box body, and a first connector, a second connector and a plurality of battery modules located in the box body; The plurality of battery modules are arranged in an array in a first direction and a second direction, the first direction and the second direction intersecting; the battery module comprises: an integrated busbar and a plurality of battery cells, the plurality of battery cells being arranged in the first direction, the integrated busbar being located on the plurality of battery cells, and the plurality of battery cells being connected via the integrated busbar, the integrated busbar having two transmission bars distributed on both sides of the battery module in the first direction; The first connecting member is located between two adjacent battery modules in the first direction and is connected to two transmission bars in the two battery modules; the second connecting member is located between two adjacent battery modules in the second direction and is connected to two transmission bars in the two battery modules; the multiple battery modules are connected in series via the first connecting member and the second connecting member; Wherein, the extending direction of the first connecting member is parallel to the first direction.

[0006] Optionally, the plurality of battery modules include: a first battery module and a second battery module, wherein the first battery module and the second battery module are adjacently distributed in the first direction; The transmission row on the side of the first battery module facing the second battery module is a first transmission row, and the transmission row on the side of the second battery module facing the first battery module is a second transmission row; the distribution position of the first transmission row in the second direction is the same as the distribution position of the second transmission row in the second direction; Wherein, two ends of the first connecting member are connected to the first transmission row and the second transmission row respectively.

[0007] Optionally, the battery cell has a first pole and a second pole arranged in the second direction; The battery cell closest to the second battery module in the first battery module is a first battery cell, and the battery cell closest to the second battery module in the second battery module is a second battery cell; the second electrode of the first battery cell and the first electrode of the second battery cell are arranged opposite to each other in the first direction; The first transmission bar is connected to the second pole of the first battery cell, and the second transmission bar is connected to the first pole of the second battery cell.

[0008] Optionally, the integrated busbar further includes: a plurality of connecting bars; for two adjacent battery cells in the same battery module, the first pole of one battery cell and the second pole of the other battery cell are arranged opposite to each other in the first direction, and the two ends of the connecting bar are respectively connected to the first pole of one battery cell and the second pole of the other battery cell.

[0009] Optionally, the multiple battery modules include: a third battery module and a fourth battery module, the third battery module and the fourth battery module are adjacently distributed in the second direction; the third battery module is the outermost battery module in a row of battery modules arranged in the first direction, and the transmission row of the third battery module on the side away from the other battery modules in the row of battery modules is a third transmission row; the fourth battery module is the outermost battery module in another row of battery modules arranged in the first direction, and the transmission row of the fourth battery module on the side away from the other battery modules in the another row of battery modules is a fourth transmission row; Wherein, two ends of the second connecting member are connected to the third transmission row and the fourth transmission row respectively.

[0010] Optionally, the transmission row of the first battery module among the multiple battery modules, which is away from the adjacent battery module on the first direction, is used to: connect to the total input end of the battery plug box; the transmission row of the last battery module among the multiple battery modules, which is away from the adjacent battery module on the first direction, is used to: connect to the total output end of the battery plug box.

[0011] Optionally, the battery module further includes: two end plates, the two end plates being respectively located on both sides of the plurality of battery cells in the first direction; The end plate has lifting holes, and the lifting holes are distributed on a side of the end plate facing the integrated busbar.

[0012] Optionally, the box body includes: a liquid cooling plate, and a box cover buckled on the liquid cooling plate; the liquid cooling plate and the box cover are sealed; The multiple battery modules are located on the liquid cooling plate and distributed in a cavity surrounded by the liquid cooling plate and the box cover.

[0013] Optionally, the liquid cooling plate comprises: a sealing flat plate, a flow channel bottom plate and a supporting frame; The sealing plate is located on a side of the battery module facing away from the box cover; The flow channel bottom plate is connected to a side of the sealing plate away from the battery module, the flow channel bottom plate has a plurality of flow channel grooves, the flow channel grooves are recessed in a direction away from the sealing plate, and the sealing plate and the plurality of flow channel grooves are used to enclose a fluid flow channel; The support frame is connected to a side of the flow channel bottom plate facing away from the sealing plate; the support frame comprises: a frame body and a plurality of first support beams; the plurality of first support beams are arranged in the first direction and are all fixedly connected to the frame body; Wherein, each of the first support beams has at least two first protrusions protruding toward the flow channel bottom plate, the first protrusions abut against the flow channel bottom plate, and the orthographic projection of the first protrusion on the sealing plate does not overlap with the orthographic projection of the flow channel groove on the sealing plate; there is a gap between the area of the first support beam other than the first protrusion and the flow channel bottom plate.

[0014] Optionally, the first support beam comprises: a first support beam body and the first protrusion, wherein the first protrusion has a cavity on a side facing away from the flow channel bottom plate; Wherein, the first support beam body and the first protrusion are an integrally stamped structure.

[0015] Optionally, the first support beam further comprises: a plurality of first reinforcing ribs extending along the second direction, wherein the plurality of first reinforcing ribs are arranged along the first direction; The at least two first protrusions include: two rows of first protrusions arranged along the first direction, each row of first protrusions includes at least one first protrusion, and the multiple first reinforcing ribs are distributed between the two rows of first protrusions.

[0016] Optionally, the support frame further comprises: at least one second support beam, the second support beam being fixedly connected to the frame body, and the second support beam being distributed between two adjacent first support beams in the first direction; Each of the second support beams has at least two second protrusions protruding toward the flow channel bottom plate, the second protrusions are connected to the flow channel bottom plate, and the orthographic projection of the second protrusions on the sealing plate does not overlap with the orthographic projection of the flow channel groove on the sealing plate; there is a gap between the area of the second support beam other than the second protrusions and the flow channel bottom plate.

[0017] Optionally, the second support beam comprises: a second support beam body and the second protrusion, wherein the second protrusion has a cavity on a side facing away from the flow channel bottom plate; Wherein, the second support beam body and the second protrusion are an integrally stamped structure.

[0018] Optionally, the second support beam further comprises: a plurality of second reinforcing ribs extending along the second direction, wherein the plurality of second reinforcing ribs are arranged along the first direction; The at least two second protrusions are arranged along the second direction, and at least part of the second reinforcing ribs are distributed between two adjacent second protrusions.

[0019] Optionally, the liquid cooling plate further includes: at least two third connecting members, and the second protrusion is connected to the flow channel bottom plate through the third connecting members.

[0020] Optionally, the support frame further includes: at least one third support beam, the extension direction of the third support beam being parallel to the first direction, the third support beam being located on a side of the first support beam and the second support beam facing the flow channel bottom plate, and the third support beam being fixedly connected to both the first support beam and the second support beam; The third support beam has a third protrusion protruding toward the flow channel bottom plate, the third protrusion is connected to the flow channel bottom plate, and the orthographic projection of the third protrusion on the sealing flat plate does not overlap with the orthographic projection of the flow channel groove on the sealing flat plate; there is a gap between the area of the third support beam other than the third protrusion and the flow channel bottom plate.

[0021] Optionally, the liquid cooling plate further includes: at least two fourth connecting members, and the third support beam is connected to the second support beam via the fourth connecting members.

[0022] Optionally, the second support beam further comprises: a fourth protrusion protruding toward the third support beam, the fourth protrusion having a cavity on a side facing away from the flow channel bottom plate, and an orthographic projection of the fourth protrusion on the sealing flat plate overlapping with an orthographic projection of the third support beam on the sealing flat plate; Among them, the part of the third support beam that overlaps with the orthographic projection of the fourth protrusion has a first connecting hole, the fourth protrusion has a second connecting hole corresponding to the first connecting hole, and the fourth connecting member is connected to the flow channel bottom plate after passing through the first connecting hole and the corresponding second connecting hole.

[0023] Optionally, the liquid cooling plate further comprises: a liquid inlet component and a liquid outlet component in communication with the fluid flow channel, the liquid inlet component and the liquid outlet component being distributed on the same side of the flow channel base plate in the first direction; the liquid cooling plate comprises: a liquid inlet flow channel area and a liquid outlet flow channel area arranged along the second direction, the liquid inlet flow channel area being closer to the liquid inlet component in the second direction; The fluid flow channel includes: a plurality of first main flow channels and a plurality of first branch flow channels distributed in the liquid inlet flow channel area, and a plurality of second main flow channels and second branch flow channels distributed in the liquid outlet flow channel area; the first main flow channels are connected to the first branch flow channels, and the second main flow channels are connected to the second branch flow channels; Wherein, the overall extension directions of the first main channel and the second main channel are both parallel to the first direction.

[0024] Optionally, the number of the liquid inlet flow channel areas is at least two; the liquid cooling plate further comprises: at least two diversion areas corresponding to the at least two liquid inlet flow channel areas, the diversion areas being distributed on a side of the corresponding liquid inlet flow channel area facing the liquid inlet component in the first direction; The fluid flow channel further includes: diversion flow channels distributed in the diversion area, and the diversion flow channels in the diversion area are communicated with the first main flow channels in the corresponding liquid inlet flow channel area.

[0025] Optionally, the flow channel bottom plate further has: third reinforcing ribs distributed in the diversion area, the third reinforcing ribs have auxiliary grooves, and the auxiliary grooves are not connected to the flow channel grooves.

[0026] Optionally, in the second direction, the maximum distance between the liquid outlet flow channel area and the adjacent diversion area is greater than the maximum distance between the liquid outlet flow channel area and the adjacent liquid inlet flow channel area.

[0027] Optionally, the flow channel bottom plate further comprises: a plurality of flow-disrupting convex hulls distributed in the liquid outlet flow channel area; the plurality of second main flow channels and the plurality of second branch flow channels are distributed around the plurality of flow-disrupting convex hulls; The side of the spoiler convex hull facing the sealing plate abuts against the side of the sealing plate facing the flow channel bottom plate, and the side of the spoiler convex hull facing away from the sealing plate has a cavity.

[0028] Optionally, the multiple spoiler convex hulls include: multiple rows of first-type spoiler convex hulls and multiple rows of second-type spoiler convex hulls arranged alternately along the first direction, a row of the first-type spoiler convex hull includes: at least two first-type spoiler convex hulls arranged along the second direction, and a row of the second-type spoiler convex hull includes: at least two second-type spoiler convex hulls arranged along the second direction; Wherein, at least two of the first-type spoiler convex hulls in a row of the first-type spoiler convex hulls are staggered in the second direction with at least two of the second-type spoiler convex hulls in a row of the second-type spoiler convex hulls.

[0029] Optionally, in the first direction, the size of the first type of spoiler convex hull is larger than the size of the second type of spoiler convex hull, and in the second direction, the size of at least part of the first type of spoiler convex hull is smaller than the size of the second type of spoiler convex hull.

[0030] Optionally, the liquid cooling plate further includes: a plurality of insulation plates connected to a side of the flow channel bottom plate facing away from the sealing flat plate; in the first direction, one insulation plate is distributed between two adjacent first support beams.

[0031] Optionally, the box cover includes: a top cover, and a side plate fixedly connected to an outer edge of the top cover; the side plate is annular, and a side of the side plate facing away from the top cover is sealed to the liquid cooling plate; the side plate has a first opening and a second opening communicating with the cavity, and the first opening and the second opening are distributed on the same side of the battery compartment in the first direction; The battery plug box further includes: a sealing cover plate, an interface cover plate and a plurality of functional modules; The multiple functional modules are located in the cavity and distributed at the position of the first opening, and at least one of the functional modules is connected to the battery module; the sealing cover is sealed to the side panel at the first opening; the interface cover has multiple interfaces, which are connected to the functional modules, and the interface cover is sealed to the side panel at the second opening.

[0032] Optionally, the sealing cover plate includes: a cover plate body and an annular connecting ring plate, wherein the connecting ring plate is distributed around the cover plate body and fixedly connected to the outer edge of the cover plate body, and the connecting ring plate is fixedly connected to the side plate at the first opening; In which, in a direction perpendicular to the cover plate body, the side of the sealing cover plate facing away from the side plate protrudes out from the side of the connecting ring plate facing away from the side plate, and the side of the sealing cover plate facing the side plate has a bearing groove body, and the part of the functional module extending through the first opening is located in the bearing groove body.

[0033] Optionally, the top cover has a plurality of convex humps on a side facing away from the liquid cooling plate, and each of the convex humps has a groove communicating with the cavity on a side facing the liquid cooling plate.

[0034] Optionally, the battery plug box further includes: a plurality of explosion-proof pressure relief valves, which are installed on both sides of the side plate in the second direction, and the plurality of explosion-proof pressure relief valves are distributed near the first opening and the second opening in the first direction.

[0035] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least: In the battery plug box provided in the present application, a plurality of battery modules are arranged along a first direction and a second direction, and the first direction is the arrangement direction of a plurality of battery cells in the battery module. A plurality of battery modules are connected in series through a first connector and a second connector, wherein the first connector is located between two adjacent battery modules in the first direction and is connected to two transmission rows in the two battery modules. By setting the extension direction of the first connector to be parallel to the first direction, the extension direction of the first connector is the same as the arrangement direction of the plurality of battery cells. In this way, the size of the first connector can be made smaller, which not only improves the tightness of the arrangement of the plurality of battery modules in the first direction, thereby improving the energy density of the battery plug box, but also improves the stability of the first connector when the battery plug box is subjected to external impact or extrusion, thereby improving the reliability of the battery plug box. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 This is a structural diagram of a battery plug-in box provided in an embodiment of the present application; Figure 2 yes Figure 1 An exploded view of the provided battery plug box; Figure 3 yes Figure 2 An electrical connection diagram of the provided battery plug box; Figure 4 yes Figure 2 A schematic diagram of the structure of a battery module in the provided battery plug box; Figure 5 yes Figure 2 A schematic diagram of the three-dimensional structure of a liquid cooling plate in a battery plug-in box is provided; Figure 6 yes Figure 5 An exploded view of the provided liquid cooling plate; Figure 7 This is a schematic structural diagram of a sealing plate provided in an embodiment of the present application; Figure 8 This is a schematic structural diagram of a flow channel bottom plate provided in an embodiment of the present application; Figure 9 This is a schematic structural diagram of a flow channel bottom plate and a flow channel groove provided in an embodiment of the present application; Figure 10 This is a structural diagram of a support frame provided in an embodiment of the present application; Figure 11 This is a schematic structural diagram of a first support beam provided in an embodiment of the present application; Figure 12 This is a schematic structural diagram of a second support beam provided in an embodiment of the present application; Figure 13 yes Figure 10 A partial enlarged view of the C2 area in the support frame is provided; Figure 14 This is a schematic diagram of the partitioning of a flow channel bottom plate provided in an embodiment of the present application; Figure 15 yes Figure 9 A partial enlarged view of the C1 area in the flow channel bottom plate is provided; Figure 16 yes Figure 14 A schematic structural diagram of a diversion area in a flow channel bottom plate is provided; Figure 17 yes Figure 14 A partial enlarged view of the C3 area in the flow channel bottom plate is provided; Figure 18 yes Figure 2 A bottom view of the provided battery box; Figure 19 yes Figure 2 A front view of the provided battery compartment.

[0038] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0040] In the related art, a battery plug-in box includes a connector and multiple battery modules. The connector is located between two adjacent battery modules and can be connected to the battery module's transmission bars, allowing multiple battery modules to be connected in series or parallel to increase the battery module capacity. In current battery plug-ins, multiple battery modules are typically arranged side by side. This results in a larger span between the transmission bars of two adjacent battery modules, which in turn increases the size of the connector. This not only affects the density of the battery module arrangement, but also easily leads to poor stability of the connector when the battery plug-in box is subjected to external impact and compression, thus affecting the reliability of the connection.

[0041] This application embodiment provides a battery plug box, please refer to Figure 1 and Figure 2 , Figure 1 This is a structural diagram of a battery plug-in box provided in an embodiment of the present application. Figure 2 yes Figure 1 An exploded view of a battery plug box is provided. The battery plug box 000 includes a box body 200, and a first connector 310, a second connector 320 and a plurality of battery modules 100 located inside the box body 200.

[0042] The box body 200 is used to accommodate the battery module 100 and other structures in the battery plug box 000 and protect these structures to prevent the battery module 100 from external impact and extrusion, thereby improving the safety and stability of the battery plug box 000.

[0043] The plurality of battery modules 100 are arranged in an array in a first direction X and a second direction Y, and the first direction X and the second direction Y intersect. For example, the first direction X may be perpendicular to the second direction Y. Here, the battery module 100 is a modular component in the battery plug box 000, which can facilitate the assembly, connection and management of the battery plug box 000. For example, Figure 2 The illustrated battery compartment 000 contains four battery modules 100, which are arranged in two rows and two columns in the first direction X and the second direction Y. However, this embodiment of the present application does not limit the number of battery modules 100. Specifically, the number of battery modules 100 can be determined based on the required total capacity of the battery compartment 000 and the capacity of each battery module 100.

[0044] The battery module 100 includes: an integrated busbar 120 and multiple battery cells 110, the multiple battery cells 110 are arranged in a first direction X, the integrated busbar 120 is located on the multiple battery cells 110, and the multiple battery cells 110 are connected through the integrated busbar 120, and the integrated busbar 120 has two transmission bars 121 distributed on both sides of the battery module 100 in the first direction X.

[0045] Here, the battery cell 110 is used to store or release electrical energy, and the battery cell 110 may be a battery cell. Figure 2 The battery cell 110 shown is a square cell, which has the characteristics of simple structure, good heat dissipation and good safety, etc. However, the embodiment of the present application is not limited thereto, and the battery cell 110 may also be a cylindrical cell.

[0046] The integrated busbar 120 (Cells Contact System, CCS) integrates connection components and data collection components. It enables multiple functions, such as series and parallel connection of multiple battery cells 110, temperature sampling, and voltage sampling. The high level of integration of the integrated busbar 120 helps improve the energy density and lightweighting of the battery plug-in box 000. The two transmission bars 121 within the integrated busbar 120 serve as input and output terminals for connecting to other battery modules 100.

[0047] The first connector 310 is located between two adjacent battery modules 100 in the first direction X and is connected to two transmission bars 121 in the two battery modules 100. The second connector 320 is located between two adjacent battery modules 100 in the second direction Y and is connected to two transmission bars 121 in the two battery modules 100. Multiple battery modules 100 are connected in series via the first connector 310 and the second connector 320.

[0048] It should be noted that, since the two transmission rows 121 are distributed on both sides of the battery module 100 in the first direction X, the first connector 310 is used to connect any two adjacent battery modules 100 in a row of battery modules 100 arranged along the first direction X. The second connector 320 is used to connect two adjacent rows of battery modules 100 in the second direction Y. In order to form a series circuit, not all two adjacent battery modules 100 in the second direction Y are provided with a second connector 320. For example, Figure 2 Taking the example of multiple battery modules 100 arranged in two rows and two columns, to connect four battery modules 100 in series, only the two battery modules 100 furthest to the rear in the first direction X are connected via second connectors 320 to form a series circuit. Therefore, for multiple battery modules 100 arranged in an array in the first direction X and the second direction Y, the number of first connectors 310 is greater than the number of second connectors 320.

[0049] The extension direction of the first connector 310 is parallel to the first direction X. That is, the extension direction of the first connector 310 is the same as the arrangement direction of the multiple battery cells 110. To enable the first connector 310 to effectively connect two adjacent battery modules 100, the two transmission bars 121 connected by the first connector 310 are also arranged along the first direction X. This reduces the distance between the two transmission bars 121 connected by the first connector 310. Consequently, the first connector 310 has a smaller dimension in the first direction X, reducing the amount of overhanging the first connector 310, providing greater stability under external forces, and effectively saving material for the first connector 310. Furthermore, the smaller dimension of the first connector 310 in the first direction X also reduces the distance between any two adjacent battery modules 100 in a row of battery modules 100 arranged along the first direction X, thereby improving the compactness of the arrangement of the multiple battery modules 100 in the first direction X.

[0050] Because the number of first connectors 310 is greater than the number of second connectors 320, and the first connectors 310 have a greater impact on the tightness of the arrangement of multiple battery modules 100 in the battery compartment 000, by adjusting the extension direction of the first connectors 310, the stability of the large number of first connectors 310 can be effectively improved, and the size of the first connectors 310 can be reduced, thereby significantly improving the reliability and energy density of the battery compartment 000.

[0051] In summary, an embodiment of the present application provides a battery plug-in box, wherein a plurality of battery modules are arranged along a first direction and a second direction, and the first direction is the arrangement direction of a plurality of battery cells in the battery module. A plurality of battery modules are connected in series through a first connector and a second connector, wherein the first connector is located between two adjacent battery modules in the first direction and is connected to two transmission rows in the two battery modules. By setting the extension direction of the first connector to be parallel to the first direction, the extension direction of the first connector is the same as the arrangement direction of the plurality of battery cells. In this way, the size of the first connector can be made smaller, which not only improves the tightness of the arrangement of the plurality of battery modules in the first direction, thereby improving the energy density of the battery plug-in box, but also improves the stability of the first connector when the battery plug-in box is subjected to external impact or extrusion, thereby improving the reliability of the battery plug-in box.

[0052] The following describes the electrical connections in the battery box: Alternatively, refer to Figure 2 and Figure 3 , Figure 3 yes Figure 2 An electrical connection diagram of the battery plug box provided, Figure 3The figure shows a high voltage circuit in the battery plug box 000, which is used to control the charge and discharge of the battery plug box 000. The multiple battery modules 100 include: a first battery module 100a and a second battery module 100b, which are adjacently distributed in a first direction X.

[0053] The transfer rows 121 on the side of the first battery module 100a facing the second battery module 100b are first transfer rows 121a, and the transfer rows 121 on the side of the second battery module 100b facing the first battery module 100a are second transfer rows 121b. The first transfer rows 121a are positioned in the same direction as the second transfer rows 121b in the second direction Y. In other words, the first transfer rows 121a and the second transfer rows 121b are positioned opposite each other in the first direction X.

[0054] The two ends of the first connector 310 are connected to the first transmission row 121a and the second transmission row 121b, respectively. This ensures that the first connector 310 can effectively connect two adjacent battery modules 100, and allows the extension direction of the first connector 310 to be parallel to the first direction X. This reduces the size of the first connector 310 and improves the reliability of the connection.

[0055] It should be noted that for Figure 2 In the illustrated case where the number of battery cells 110 in the battery module 100 is odd, the two transfer bars 121 in the battery module 100 are arranged at different positions in the second direction Y. That is, the two transfer bars 121 are staggered in the first direction X. Therefore, in order to ensure that the distribution position of the first transfer bar 121a in the second direction Y is the same as the distribution position of the second transfer bar 121b in the second direction Y, the arrangement of the multiple battery cells 110 in the first battery module 100a is different from the arrangement of the multiple battery cells 110 in the second battery module 100b.

[0056] Optionally, the battery cell 110 has a first electrode 111 and a second electrode 112 arranged in the second direction Y. One of the first electrode 111 and the second electrode 112 is a positive electrode, and the other is a negative electrode. Figure 2 In the first battery module 100 a and the second battery module 100 b shown, the first electrode 111 is a positive electrode, and the second electrode 112 is a negative electrode.

[0057] The battery cell 110 in the first battery module 100a that is closest to the second battery module 100b is the first battery cell 110a, and the battery cell 110 in the second battery module 100b that is closest to the second battery module 100b is the second battery cell 110b. That is, the first battery cell 110a and the second battery cell 110b are the two closest battery cells 110 in the first battery module 100a and the second battery module 100b, respectively. The second electrode 112 of the first battery cell 110a and the first electrode 111 of the second battery cell 110b are arranged opposite each other in the first direction X.

[0058] The first transmission bar 121a is connected to the second electrode 112 of the first battery cell 110a, and the second transmission bar 121b is connected to the first electrode 111 of the second battery cell 110b. This facilitates the arrangement of the first transmission bar 121a and the second transmission bar 121b relative to each other in the first direction X, and ensures that the first connector 310 is effectively connected to the first transmission bar 121a and the second transmission bar 121 to form a series circuit.

[0059] Optionally, refer to Figure 3 and Figure 4 , Figure 4 yes Figure 2 A schematic structural diagram of a battery module in a provided battery plug-in box. The integrated busbar 120 further includes: a plurality of connecting bars 122. For two adjacent battery cells 110 in the same battery module 100, the first pole 111 of one battery cell 110 and the second pole 112 of the other battery cell 110 are arranged relative to each other in a first direction X, and the two ends of the connecting bar 122 are respectively connected to the first pole 111 of one battery cell 110 and the second pole 112 of the other battery cell 110. In this way, the plurality of connecting bars 122 can connect the plurality of battery cells 110 in the same battery module 100 in series to form a series circuit.

[0060] In the present application, two transmission bars 121 correspond to the first and last battery cells, respectively, and the transmission bars 121 are located above the corresponding battery cells 110. The transmission bars 121 can be welded to the first pole 111 or the second pole 112 of the corresponding battery cell 110 to achieve electrical connection and fixation. For example, the first transmission bar 121a is welded to the pole of the second pole 112 of the first battery cell 110a, and the second transmission bar 121b is welded to the pole of the first pole 111 of the second battery cell 110b. Similarly, each connection bar 122 corresponds to two adjacent battery cells 110, and the connection bar 122 is located above the corresponding two battery cells 110. The connection bar 122 can be welded to the first pole 111 of one battery cell 110, and the connection bar 122 can be welded to the second pole 112 of the other battery cell 110 to achieve electrical connection and fixation. Exemplarily, the transmission bar 121 and the connection bar 122 may both be aluminum bars, but the present application is not limited thereto.

[0061] Optionally, the plurality of battery modules 100 include a third battery module 100c and a fourth battery module 100d, wherein the third battery module 100c and the fourth battery module 100d are adjacently arranged in the second direction Y. The third battery module 100c is the outermost battery module 100 in a row of battery modules 100 arranged in the first direction X. The transmission row 121 of the third battery module 100c on the side facing away from the other battery modules 100 in the row of battery modules 100 is a third transmission row 121c. The fourth battery module 100d is the outermost battery module 100 in another row of battery modules 100 arranged in the first direction X. The transmission row 121 of the fourth battery module 100d on the side facing away from the other battery modules 100 in the other row of battery modules 100 is a fourth transmission row 121d.

[0062] It should be noted that the third battery module 100c and the fourth battery module 100d are two battery modules 100 adjacent to each other in the second direction Y except the first battery module 100 and the last battery module 100. Figure 2 The battery modules 100 are arranged in two rows and two columns. The fourth battery module 100d is also the second battery module 100b. The two transmission rows 121 of the fourth battery module 100d are the second transmission row 121b and the fourth transmission row 121d.

[0063] The two ends of the second connector 320 are connected to the third transmission bar 121c and the fourth transmission bar 121d, respectively. In this way, the second connector 320 can connect in series two battery modules 100 that are adjacent to each other in the second direction Y. Here, the extension direction of the second connector 320 is parallel to the second direction Y, and the dimension of the first connector 310 in the first direction X can be smaller than the dimension of the second connector 320 in the second direction Y.

[0064] In this application, the first connector 310 contacts the corresponding transmission bar 121 and is locked with bolts to achieve electrical connection and fixation between the first connector 310 and the corresponding transmission bar 121. Similarly, the second connector 320 contacts the corresponding transmission bar 121 and is locked with bolts to achieve electrical connection and fixation between the second connector 320 and the corresponding transmission bar 121.

[0065] Optionally, the transmission row 121 of the first battery module 100 in the plurality of battery modules 100, on the side facing away from the adjacent battery modules 100 in the first direction X, is configured to connect to the main input terminal 511 of the battery plug box 000. The transmission row 121 of the last battery module 100 in the plurality of battery modules 100, on the side facing away from the adjacent battery modules 100 in the first direction X, is configured to connect to the main output terminal 512 of the battery plug box 000. Here, the main input terminal 511 and the main output terminal 512 of the battery plug box 000 are connected to the outside. For example, the main input terminal 511 may be a main positive high-voltage connector socket, and the main output terminal 512 may be a main negative high-voltage connector socket.

[0066] In this application, the transmission bus 121 can be connected to the main input terminal 511 or the main output terminal 512 via a copper busbar. The first and second connectors 310 and 320 can also be copper busbars. First, the copper busbar offers excellent electrical performance. Copper has an electrical conductivity approximately 1.6 times that of aluminum, effectively reducing losses during power transmission, improving energy efficiency, and ensuring efficient power delivery. Furthermore, copper's low electrical resistance reduces heat generated when current flows through it, minimizing energy loss, improving the operational stability of the battery compartment 000, and extending its service life. Second, the copper busbar offers strong mechanical properties. It possesses excellent mechanical strength and can withstand certain external forces and impacts, remaining resistant to deformation or damage. This ensures the stability and reliability of the battery compartment 000's electrical connection. Third, the copper busbar offers excellent heat dissipation performance. Copper's excellent thermal conductivity helps quickly dissipate heat within the battery compartment 000, effectively preventing equipment failure or performance degradation due to overheating and ensuring the equipment operates at a safe operating temperature. Fourthly, copper busbars offer excellent corrosion resistance, offering excellent resistance to a variety of corrosive media in the atmosphere, water, and soil. They maintain stable performance under varying environmental conditions, especially in outdoor or humid environments, reducing electrical failures caused by corrosion. Fifthly, copper busbars are easy to install. Compared to some other conductive connection methods, copper busbars have a smaller cross-section, making them easier to install and route within limited spaces, helping to improve equipment space utilization.

[0067] Optionally, the battery plug box 000 may further include: a fuse 600a and a manual service disconnect (MSD) 600b. The fuse 600a is respectively connected to the manual service disconnect 600b and the transmission bus 121 of the last battery module 100. The manual service disconnect 600b is respectively connected to the fuse 600a and the total output terminal 512. The transmission bus 121 and the fuse 600a, the fuse 600a and the manual service disconnect 600b, and the manual service disconnect 600b and the total output terminal 512 are all connected via copper busbars to improve electrical connection performance.

[0068] Fuse 600a can quickly disconnect the circuit when an abnormality such as an overload or short circuit occurs in the high-voltage circuit, preventing the fault from escalating and ensuring safe and stable operation of the circuit. This can prevent damage to the battery compartment 000 from being exposed to abnormally high current shocks. Furthermore, fuse 600a is small in size and can be installed in a variety of ways. Once fuse 600a blows, replacement is simple. The embodiments of the present application allow for the selection of fuses of appropriate specifications based on the rated current and operating characteristics of different circuits, achieving precise protection and ensuring timely operation at the specified current threshold.

[0069] For example, fuse 600a can be a passive fuse. When the current in the circuit exceeds a set value, the passive fuse melts due to the cumulative heat of the fuse element, thereby disconnecting the circuit and preventing the current from continuing to flow and potentially causing equipment damage or fire. Passive fuses do not require external control and rely solely on the heat generated when the current exceeds the set value to trigger melting.

[0070] The manual maintenance switch 600b is used to quickly disconnect the circuit when the battery compartment 000 experiences a fault, anomaly, or requires emergency maintenance, preventing the dangerous situation from developing further and ensuring the safety of personnel and equipment. For example, in the event of an emergency such as battery overheating or short circuit, the circuit can be disconnected in a timely manner to prevent serious consequences such as fire and explosion. The manual maintenance switch 600b can also effectively prevent the circuit from being connected or disconnected due to misoperation or unexpected circumstances, reducing safety risks. In addition, when performing routine maintenance, inspection, or replacing components on the battery compartment 000, operating the manual maintenance switch 600b can isolate multiple battery modules 100 from the external circuit, making maintenance work safer and more convenient. For example, when replacing a battery cell 110 or inspecting the circuit, maintenance personnel can first disconnect the manual maintenance switch 600b to ensure that no current flows during the operation, reducing the risk of electric shock.

[0071] Based on this, the embodiment of the present application can effectively improve the safety and stability of the battery plug box 000 by configuring a manual maintenance switch 600b and a fuse 600a in the negative electrode circuit.

[0072] The following describes the structure of the battery module: Alternatively, refer to Figure 4 The battery module 100 further includes two end plates 130, which are located on either side of the battery cells 110 in the first direction X. The end plates 130 can be used in conjunction with a steel band 140, which wraps around the two end plates 130 and the battery cells 110, thereby securing the battery cells 110. The end plates 130 also protect the battery cells 110 and effectively resist expansion forces during charging and discharging.

[0073] For example, the end plate 130 can be a metal end plate manufactured by a casting process, which has a good yield strength. In the case where the end plate 130 is a metal end plate, a first insulating sheet 150 can be provided between the end plate 130 and the battery cell 110 to provide insulation protection. For the battery cell 110 closest to the end plate 130, the battery cell 110 has a first surface opposite to the end plate 130 and an annular side surface connected to the first surface. The first insulating sheet 150 wraps around at least a portion of the first surface and the side surface, thereby effectively preventing leakage from the first surface and the side surface of the battery cell 110, thereby improving safety.

[0074] Among them, the end plate 130 has a lifting hole K3, and the hook in the lifting tool can be hooked in the lifting hole K3, so that the entire battery module 100 can be moved by moving the end plate 130. The lifting holes K3 are distributed on the side of the end plate 130 facing the integrated busbar 120, so as to reduce the interference between the lifting tool and the installed battery module 100, thereby reducing the gap between adjacent battery modules 100 in the first direction X, so as to improve the tightness of the arrangement of the battery modules 100, and thus improve the energy density of the battery plug box. Exemplarily, the number of lifting holes K3 in the end plate 130 is two, and the two lifting holes K3 are distributed on both sides of the end plate 130 in the second direction Y to ensure balanced force.

[0075] The end plate 130 also has a through hole K5. By passing a connecting member such as a screw through the through hole K5 and connecting it to the box body 200, the end plate 130 can be fixed in the box body 200. Exemplarily, the number of through holes K5 in the end plate 130 is three, and the three through holes K5 are distributed on both sides and the middle area of the end plate 130 in the second direction Y to ensure balanced force.

[0076] Optionally, the integrated busbar 120 includes a carrier substrate 124, a data acquisition assembly 123 located on the carrier substrate 124, two transmission bars 121, and a plurality of connection bars 122. The data acquisition assembly 123 includes a voltage acquisition component 123a and a temperature acquisition component 123b. For example, the present application may employ full voltage acquisition and partial temperature acquisition. Specifically, each battery cell 110 corresponds to a voltage acquisition component 123a, so that the data acquisition assembly 123 can acquire the voltage of each battery cell 110. For every two battery cells 110, a temperature acquisition component 123b corresponds to each other. Thus, the temperature acquired by one temperature acquisition component 123b reflects the temperature of both battery cells 110. However, the present application is not limited to this embodiment; full temperature acquisition may also be employed.

[0077] The data acquisition component 123 communicates with the battery management system (BMS) 600c, allowing the BMS 600c to receive voltage and temperature data. Exemplarily, the data acquisition component 123 is a wiring harness, with a plug at the end of the harness connecting to an interface on the BMS 600c. However, the present invention is not limited to this embodiment; the data acquisition component 123 may also be a flexible printed circuit board.

[0078] The following is an explanation of the structure of the battery box: Alternatively, refer to Figure 2The box body 200 includes a liquid cooling plate 210 and a box cover 220 that snaps onto the liquid cooling plate 210. The liquid cooling plate 210 and the box cover 220 are sealed together. For example, an annular waterproof silicone gasket can be placed between the liquid cooling plate 210 and the box cover 220 to enhance the sealing and waterproofing of the battery box 000, thereby improving its applicability in various application environments.

[0079] Multiple battery modules 100 are located on the liquid cooling plate 210 and distributed within the cavity enclosed by the liquid cooling plate 210 and the case cover 220. For example, the battery modules 100 can be secured to the liquid cooling plate 210 using connectors such as screws. The liquid cooling plate 210 not only supports the multiple battery modules 100 but also improves heat dissipation.

[0080] Compared to other cooling systems, such as air cooling and natural cooling, liquid cooling plate 210 uses liquid convection to quickly remove heat generated by the batteries, reducing battery temperature. Therefore, liquid cooling plate 210 has high heat dissipation efficiency. The liquid medium in liquid cooling plate 210 has a high heat transfer coefficient and large heat capacity, making the temperature distribution within the battery pack more uniform and improving the consistency of the battery pack temperature field. Therefore, liquid cooling plate 210 helps maintain the battery within the optimal operating temperature range, thereby improving the battery's energy density and service life.

[0081] In one possible implementation, see Figure 5 , Figure 5 yes Figure 2 A schematic diagram of the three-dimensional structure of a liquid cooling plate in a battery plug-in box is provided. Liquid cooling plate 210 has a sealed flow channel filled with coolant. Liquid cooling plate 210 can be a stamped brazed liquid cooling plate. The stamped brazed process facilitates the manufacture of the flow channel in liquid cooling plate 210, ensuring a more uniform and rapid flow of coolant within the plate, further enhancing heat dissipation. Stamped brazed liquid cooling plates offer excellent sealing properties, preventing coolant leakage, which could reduce heat dissipation or damage equipment.

[0082] Optionally, refer to Figures 5 to 10 , Figure 6 yes Figure 5 An exploded view of the liquid cooling plate provided. Figure 7 This is a structural diagram of a sealing plate provided in an embodiment of the present application. Figure 8 This is a schematic structural diagram of a flow channel bottom plate provided in an embodiment of the present application. Figure 9 This is a schematic structural diagram of a flow channel bottom plate and a flow channel groove provided in an embodiment of the present application. Figure 102 is a schematic diagram of a support frame according to an embodiment of the present application. The liquid cooling plate 210 includes a sealing plate 211 , a flow channel bottom plate 212 and a support frame 213 .

[0083] The sealing plate 211 is located on the side of the battery module 100 away from the box cover 220. The sealing plate 211 can contact the battery module 100 and play a supporting role.

[0084] The flow channel base plate 212 is connected to the side of the sealing plate 211 facing away from the battery module 100. The flow channel base plate 212 has multiple flow channel grooves A1, which are recessed away from the sealing plate 211. The sealing plate 211 and the multiple flow channel grooves A1 are used to enclose a fluid flow channel. The multiple flow channel grooves A1 can be interconnected.

[0085] In one possible implementation, Figure 8 and Figure 9 As shown, for the convenience of observation, Figure 9 The flow channel groove A1 is shown in a shaded manner. The fluid flow channel formed by the sealing plate 211 and the plurality of flow channel grooves A1 can also be referred to. Figure 9 The shape of the middle flow channel groove A1 In the embodiment of the present application, the entirety of the sealing flat plate 211 and the flow channel bottom plate 212 fixedly connected together can be defined as a flow channel plate.

[0086] like Figure 6 and Figure 10 As shown, the support frame 213 is connected to the side of the flow channel bottom plate 212 facing away from the sealing plate 211. The support frame 213 includes: a frame body B4 and a plurality of first support beams B1. The plurality of first support beams B1 are arranged in a first direction X and are fixedly connected to the frame body B4.

[0087] Each first support beam B1 has at least two first protrusions B11 projecting toward the flow channel base plate 212. The first protrusions B11 abut against the flow channel base plate 212, and the orthographic projections of the first protrusions B11 on the sealing plate 211 do not overlap with the orthographic projections of the flow channel grooves A1 on the sealing plate 211. A gap exists between the areas of the first support beam B1 other than the first protrusions B11 and the flow channel base plate 212. Here, the first protrusions B11 abut against the areas of the flow channel base plate 212 other than the flow channel grooves A1. Thus, all other areas of the first support beam B1 other than the first protrusions B11 do not contact the flow channel base plate 212.

[0088] In the embodiment of the present application, the sealing plate 211 abuts against the portion of the flow channel base plate 212 other than the flow channel groove A1, and the first protrusion B11 of the first support beam B1 abuts against the portion of the flow channel base plate 212 other than the flow channel groove A1. In this way, when the support frame 213 supports the flow channel plate (specifically, the flow channel base plate 212), it supports the portion of the flow channel base plate 212 other than the flow channel groove A1, that is, it supports the solid part of the flow channel plate. Therefore, the portion of the flow channel base plate 212 with the flow channel groove A1 will not contact the support frame 213. When carrying the battery module, the portion of the flow channel base plate 212 with the flow channel groove A1 will not be compressed and deformed, that is, the cavity portion of the flow channel plate will not be compressed and deformed. Therefore, the fluid flow channel can remain intact and not deformed during the use of the liquid cooling plate 210, thereby ensuring that the cooling function of the liquid cooling plate 210 is not affected.

[0089] It should be noted that the support frame 213 is connected to the side of the flow channel base plate 212 facing away from the sealing plate 211, and the two can be detachably connected. For example, after the flow channel base plate 212 and the sealing plate 211 are fixedly connected to form the flow channel plate, the support frame 213 is then detachably connected to the flow channel plate. This can avoid deformation of the flow channel base plate 212 caused by fixedly connecting the support frame 213 to the flow channel base plate 212 by welding or other methods, thereby preventing the connection between the flow channel base plate 212 and the sealing plate 211 from being affected, thereby ensuring the airtightness of the fluid flow channel.

[0090] Please refer to Figures 5 to 7 The liquid cooling plate 210 may also include a liquid inlet component 216 and a liquid outlet component 217, which are used to connect to the cooling medium supply system. The sealing plate 211 may have a liquid inlet 211a and a liquid outlet 211b, and the corresponding positions of the flow channel groove A1 of the flow channel base plate 212 can serve as the liquid inlet port 212a and the liquid outlet port 212b. After the flow channel base plate 212 and the sealing plate 211 are fixedly connected, the liquid inlet 211a and the liquid outlet 211b of the sealing plate 211 serve as the liquid inlet and the liquid outlet of the fluid flow channel.

[0091] The structure of the support frame 213 is described in detail below.

[0092] For some possible implementations, see Figure 10The frame body B4 may include a front bottom crossbeam B41, a rear bottom crossbeam B42, and two side beams B43. The front bottom crossbeam B41, the rear bottom crossbeam B42, and the two side beams B43 may form a square frame body B4. The front bottom crossbeam B41 and the side beams B43, as well as the rear bottom crossbeam B42 and the side beams B43, may be fixedly connected using resistance welding. Of course, the frame body B4 may also be implemented in other ways, and this embodiment of the present application is not limiting.

[0093] For some possible implementations, see Figure 11 , Figure 11 This is a structural diagram of a first support beam provided in an embodiment of the present application. The first support beam B1 includes: a first support beam body B12 and a first protrusion B11. The first protrusion B11 has a cavity on the side facing away from the flow channel bottom plate 212.

[0094] For example, the first support beam body B12 and the first protrusion B11 are integrally stamped. Here, the first support beam B1 can be formed by stamping, so that the first support beam body B12 and the first protrusion B11 can be integrally formed. That is, the first protrusion B11 is a stamped convex bump relative to the first support beam body B12. The side of the stamped convex bump facing away from the flow channel base plate 212 is a cavity. The stamped convex bump can adapt to the shape between the flow channel grooves A1 and support the portion of the flow channel base plate 212 other than the flow channel grooves A1.

[0095] Because the fluid flow channel of the flow channel plate is a hollow structure with a relatively thin wall thickness, the hollow structure lacks strong internal support. The cavity structure has a large internal space and lacks sufficient internal support. Therefore, the portion of the first support beam B1 other than the first protrusion B11 cannot directly contact and support the cavity structure of the flow channel plate. When the liquid cooling plate 210 is loaded with battery modules, the cavity structure of the flow channel plate is subjected to stress, causing the structure to deform and collapse. This, in turn, can block the flow path of the cooling medium (e.g., coolant), increasing the overall flow resistance of the liquid cooling plate 210 and affecting its performance. Therefore, the provision of the first protrusion B1 prevents direct contact with the cavity structure of the fluid flow channel, which could cause deformation and collapse due to stress. The area where these first protrusions B1 contact the flow channel base plate 212 is solid and free of the flow channel cavity structure. This area can serve as a load-bearing portion, allowing the support frame 213 to support the flow channel plate without causing hard contact deformation of the cavity structure.

[0096] In addition, the first support beam B1 can be fixedly connected to the side beams B43 of the frame body B4 on both sides in the second direction Y by resistance welding, wherein resistance welding has high welding quality, and when the molten core is formed, it is always surrounded by a plastic ring, the molten metal is isolated from the air, the metallurgical process is simple, and the chemical composition of the weld metal is uniform and basically consistent with the parent material. The welding heat is concentrated, the heating range is small, and the heat-affected zone is small, so the welding deformation is small and easy to control. Moreover, resistance welding does not require filler metals such as welding wire and welding rods, as well as welding materials such as oxygen, acetylene, and hydrogen, which saves the cost of welding materials. Since the welding process is relatively simple and does not require complicated subsequent processing steps, the overall welding cost can be reduced.

[0097] Optionally, the first support beam B1 further includes: a plurality of first reinforcing ribs B13 extending along the second direction Y, and the plurality of first reinforcing ribs B13 are arranged along the first direction X. There is a gap between the first reinforcing ribs B13 and the flow channel bottom plate 212 , that is, the first reinforcing ribs B13 do not contact the flow channel bottom plate 212 .

[0098] In some possible implementations, the at least two first protrusions B11 include: two rows of first protrusions B11 arranged along the first direction X, each row of first protrusions B11 including at least one first protrusion B11, for example, Figure 11 As shown, there are four first protrusions B11 in the first support beam B1, which are arranged in two rows and two columns. A plurality of first reinforcing ribs B13 are distributed between the two rows of first protrusions B11.

[0099] The first reinforcing rib B13 and the first protrusion B11 can be integrally stamped. Using a sheet metal stamping process, a linear convex reinforcing rib (i.e., the first reinforcing rib B13) is stamped in the first direction X to increase the material's moment of inertia. The shape of the first reinforcing rib B13 adds additional material distribution to the structure, which increases the moment of inertia of the structural cross-section. The moment of inertia is a key parameter that measures an object's resistance to bending and torsion. The greater the moment of inertia, the greater the structure's resistance to bending and torsion. When a structure is subjected to external forces, stress tends to concentrate in certain localized areas. The presence of the first reinforcing rib B13 distributes this concentrated stress over a larger area, reducing localized stress peaks and thereby improving the overall load-bearing capacity of the structure. The first reinforcing rib B13 increases the rigidity of the structure, making it less susceptible to deformation and instability when subjected to external forces. The addition of the first reinforcing rib B13 significantly improves its stability, preventing excessive deformation or bending during use. The first reinforcing rib B13 inherently possesses a certain strength and rigidity. They can directly absorb some external forces, reducing the load on the main structure, distributing some of the pressure, and enhancing overall strength.

[0100] For some possible implementations, see Figure 10 and Figure 12 , Figure 12 This is a structural schematic diagram of a second support beam provided in an embodiment of the present application. The support frame 213 also includes: at least one second support beam B2, the second support beam B2 is fixedly connected to the frame body B4, and the second support beam B2 is distributed between two adjacent first support beams B1 in the first direction X.

[0101] The second support beam B2 can have a similar effect to the first support beam B1, namely, supporting the portion of the flow channel base plate 212 other than the flow channel groove A1. A fifth connection hole H5 can also be provided on the second protrusion B21 of the second support beam B2. The third connecting member 214 can be inserted through the fifth connection hole H5 and the third connection hole H3 of the flow channel base plate 212, thereby removably connecting the second support beam B2 to the flow channel base plate 212. In this way, the flow channel base plate 212 can be connected not only to the frame body B4 but also to the second support beam B2. The third connecting member 214 can also be inserted through the sixth connection hole H6 of the sealing plate 211.

[0102] In addition, the second support beam B2 can be located in the middle of the support frame 213 in the first direction X. The support frame 213 is crucial to the load-bearing capacity of the middle part of the flow channel plate. The battery module 100 is located above the liquid cooling plate 210. As the number of battery modules 100 increases or the weight of the battery modules 100 increases, the compressive stress in the middle part is the greatest. The liquid cooling plate 210 needs to have sufficient load-bearing capacity to prevent deformation, damage, etc. due to being unable to bear the weight, which affects the normal operation and service life of the battery pack. During actual use, the liquid cooling plate 210 may be subjected to pressure from various directions, such as the tightening force during installation, the squeezing force of other components inside the battery pack, etc. If the load-bearing capacity of the middle part is insufficient, it is easy to be squeezed and deformed under the action of these pressures. Once the flow channel plate is deformed, it may cause the coolant to flow poorly, affecting the heat dissipation effect, and may even damage the liquid cooling plate 210 itself, posing a safety hazard. In some complex working environments, the liquid cooling plate 210 may be subjected to uneven stress distribution. Strengthening the load-bearing design can better disperse these stresses in the middle part, avoid stress concentration at a certain point or area, and thus reduce the risk of damage to the manifold due to excessive local stress.

[0103] Each second support beam B2 has at least two second protrusions B21 projecting toward the flow channel base plate 212. The second protrusions B21 are connected to the flow channel base plate 212. For example, the second protrusions B21 and the flow channel base plate 212 may be connected by welding, clamping, riveting, threading, or the like. The orthographic projections of the second protrusions B21 on the sealing plate 211 do not overlap with the orthographic projection of the flow channel groove A1 on the sealing plate 211. A gap exists between the second support beam B2 and the flow channel base plate 212, excluding the second protrusions B21.

[0104] Optionally, the second support beam B2 includes: a second support beam body B22 and a second protrusion B21 , and the second protrusion B21 has a cavity on a side facing away from the flow channel bottom plate 212 .

[0105] The second support beam body B22 and the second protrusion B21 are integrally stamped. The second support beam B2 can be formed by stamping, so that the second support beam body B22 and the second protrusion B21 are integrally formed. In other words, the second protrusion B21 is a stamped convex bump relative to the second support beam body B22, with the side of the stamped convex bump facing away from the flow channel base plate 212 being a cavity. The stamped convex bump can adapt to the shape between the flow channel grooves A1, providing support for the portion of the flow channel base plate 212 other than the flow channel grooves A1.

[0106] Optionally, the second support beam B2 further includes: a plurality of second reinforcing ribs B23 extending along the second direction Y, and the plurality of second reinforcing ribs B23 are arranged along the first direction X.

[0107] At least two second protrusions B21 are arranged along the second direction Y, and at least part of the second reinforcing ribs B23 are distributed between two adjacent second protrusions B21. There is a gap between the second reinforcing ribs B23 and the flow channel bottom plate 212, that is, the second reinforcing ribs B23 do not contact the flow channel bottom plate 212.

[0108] For example, Figure 12 As shown, multiple second reinforcing ribs B23 can be divided into multiple groups, each group of second reinforcing ribs B23 has at least two second reinforcing ribs B23 arranged along the first direction X; wherein, a second protrusion B21 can have a group of second reinforcing ribs B23 distributed on both sides of the second direction Y.

[0109] For example, at least part of the second reinforcing ribs B23 may be distributed on both sides of the second protrusion B21 in the first direction X. The second support beam body B22 and the second reinforcing ribs B23 are an integrally stamped structure.

[0110] This embodiment of the present application enhances the load-bearing capacity of the second support beam B2 by providing second reinforcing ribs B23. Multiple linear convex reinforcing ribs (also known as second reinforcing ribs B23) are stamped into the middle portion of the second support beam B2 in the second direction Y to increase the material's moment of inertia. The shape of the second reinforcing ribs B23 adds additional material distribution to the structure, which increases the moment of inertia of the structural cross-section. When a structure is subjected to external forces, stress tends to concentrate in certain localized areas. The presence of the second reinforcing ribs B23 disperses these concentrated stresses over a larger area, reducing localized stress peaks and thereby improving the overall load-bearing capacity of the structure. The second reinforcing ribs B23 increase the rigidity of the structure, making it less susceptible to deformation and instability when subjected to external forces. The addition of the second reinforcing ribs B23 significantly improves its stability, preventing excessive deformation or bending during use. The second reinforcing ribs B23 inherently possess a certain strength and rigidity. They can directly absorb some of the external forces, reducing the load borne by the main structure, sharing some of the pressure, and enhancing overall strength.

[0111] Therefore, the second support beam B2 can effectively disperse stress from all directions, prevent stress concentration, and improve the battery pack's ability to resist bottom impact, while also increasing the structural strength and bearing capacity of the liquid cooling plate 210.

[0112] Optionally, the liquid cooling plate 210 further includes at least two third connectors 214 , through which the second protrusion B21 is connected to the flow channel base plate 212 . In other words, the second protrusion B21 is connected to the portion of the flow channel base plate 212 excluding the flow channel groove A1 via the third connectors 214 .

[0113] For some possible implementations, see Figure 10 and Figure 13 , Figure 13 yes Figure 10 A partial enlarged view of region C2 of the support frame is provided. The support frame 213 also includes: at least one third support beam B3, extending parallel to the first direction X, located on the side of the first and second support beams B1 and B2 facing the flow channel base plate 212, and fixedly connected to both the first and second support beams B1 and B2.

[0114] The third support beam B3 has a third protrusion B31 that projects toward the flow channel bottom plate 212. The third protrusion B31 is connected to the flow channel bottom plate 212, and the orthographic projection of the third protrusion B31 on the sealing plate 211 does not overlap with the orthographic projection of the flow channel groove A1 on the sealing plate 211. A gap exists between the third support beam B3 and the flow channel bottom plate 212, excluding the third protrusion B31.

[0115] Optionally, the liquid cooling plate 210 further includes: at least two fourth connecting members 215 , and the third support beam B3 is connected to the second support beam B2 via the fourth connecting members 215 .

[0116] Optionally, the second support beam B2 further includes a fourth protrusion B24 projecting toward the third support beam B3. The fourth protrusion B24 has a cavity on the side facing away from the flow channel base plate 212. The orthographic projection of the fourth protrusion B24 on the sealing plate 211 overlaps the orthographic projection of the third support beam B3 on the sealing plate 211. In other words, the third protrusion B31 abuts against the portion of the flow channel base plate 212 excluding the flow channel groove A1. The third protrusion B31 may be a strip-shaped support boss extending parallel to the first direction X.

[0117] Among them, the part of the third support beam B3 that overlaps with the positive projection of the fourth protrusion B24 has a first connecting hole H1, the fourth protrusion B24 has a second connecting hole H2 corresponding to the first connecting hole H1, and the fourth connecting member 215 passes through the first connecting hole H1 and the corresponding second connecting hole H2 and is connected to the flow channel bottom plate 212.

[0118] In one possible implementation, Figure 7 and Figure 8 As shown, the flow channel bottom plate 212 may have a fourth connecting hole H4, the sealing plate 211 may have a seventh connecting hole H7, and the fourth connecting member 215 may continue to pass through the fourth connecting hole H4 of the flow channel bottom plate 212 and the seventh connecting hole H7 of the sealing plate 211, thereby connecting the flow channel bottom plate 212 and the sealing plate 211 to the second support beam B2.

[0119] The fluid flow path of the liquid cooling plate 210 is described in detail below.

[0120] For some possible implementations, see Figure 9 and Figure 14 , Figure 14 This is a schematic diagram of the partitioning of a flow channel base plate provided in an embodiment of the present application. The liquid cooling plate 210 further includes: a liquid inlet component 216 and a liquid outlet component 217 in communication with the fluid flow channel. The liquid inlet component 216 and the liquid outlet component 217 are both located on the same side of the flow channel base plate 212 in the first direction X. Exemplarily, the liquid inlet and outlet of the liquid cooling plate 210 are also located on the same side to ensure that the battery module 100 can be cooled and heated simultaneously, thereby reducing the surface temperature difference of the flow channel plate.

[0121] The liquid cooling plate 210 has a liquid inlet channel area Q1 and a liquid outlet channel area Q2 arranged along the second direction Y. The liquid inlet channel area Q1 is closer to the liquid inlet component 216 in the second direction Y, and the liquid outlet channel area Q2 is closer to the liquid outlet component 217 in the second direction Y.

[0122] The fluid flow path includes: a plurality of first main channels A11 and a plurality of first branch channels A12 distributed in the liquid inlet channel area Q1, and a plurality of second main channels A13 and second branch channels A14 distributed in the liquid outlet channel area Q2. The first main channels A11 communicate with the first branch channels A12, and the second main channels A13 communicate with the second branch channels A14.

[0123] The overall extension direction of the first main channel A11 and the second main channel A13 is parallel to the first direction X. That is, the overall extension direction of the first main channel A11 and the second main channel A13 is the length direction of the liquid cooling plate 210. For example, the overall extension direction of the first branch channel A12 and the first branch channel A12 can be parallel to the second direction Y, that is, the width direction of the liquid cooling plate 210.

[0124] In the embodiment of the present application, the distance between two adjacent first main channels A11 in the second direction Y is less than the sum of the widths of the two adjacent first main channels A11 in the second direction Y. In other words, the spacing between the multiple first main channels A11 is narrow, so that more first main channels A11 can be provided in the liquid inlet channel area Q1.

[0125] In some possible implementations, the area of the orthographic projection of the flow channel groove A1 on the sealing plate 211 is larger than the area of the orthographic projection of the portion of the flow channel bottom plate 212 other than the flow channel groove A1 on the sealing plate 211; the area of the orthographic projection of the flow channel groove A1 in the two liquid inlet flow channel areas Q1 on the sealing flow channel plate is larger than the area of the orthographic projection of the flow channel groove A1 in the liquid outlet flow channel area Q2 on the sealing plate 211.

[0126] In this way, within the liquid inlet channel area Q1, the flow channels are arranged with smaller spacing, providing more circulation loops, making the battery heated or cooled more evenly and reducing temperature differences. The contact area between the cooling medium and the flow channel plate is larger, providing higher heat dissipation efficiency.

[0127] For example, please refer to Figure 9 and Figure 15 , Figure 15 yes Figure 9 A partial enlarged view of the C1 region in the flow channel bottom plate is provided. The multiple first main flow channels A11 distributed in each liquid inlet flow channel area Q1 can be divided into multiple groups of first main flow channels A11. Each group of first main flow channels A11 can include two first main flow channels A11, and the two first main flow channels A11 are arranged in parallel. The cooling medium in two adjacent groups of first main flow channels A11 flows in opposite directions. Figure 15The arrows in the two sets of first main channels A11 shown indicate the direction of cooling medium flow. This creates a dual, parallel loop with a smaller spacing, resulting in lower coolant flow resistance, a more optimized coolant flow path, and higher cooling efficiency. This ensures uniform battery temperature during charging and discharging, significantly reduces temperature differences between battery modules 100, and optimizes heat dissipation.

[0128] For some possible implementations, see Figure 14 and Figure 16 , Figure 16 yes Figure 14 A schematic diagram of the structure of a diversion area in the flow channel base plate is provided. The number of liquid inlet flow channel areas Q1 is at least two. The liquid cooling plate 210 further has: at least two diversion areas Q3 corresponding to the at least two liquid inlet flow channel areas Q1, and the diversion areas Q3 are distributed on the side of the corresponding liquid inlet flow channel area Q1 facing the liquid inlet component 216 in the first direction X. For example, Figure 14 As shown, there are two liquid inlet channel areas Q1 and two diversion areas Q3.

[0129] The fluid flow channel further includes: a diversion flow channel A15 distributed in the diversion area Q3, and the diversion flow channel A15 in the diversion area Q3 is communicated with the first main flow channel A11 in the corresponding liquid inlet flow channel area Q1.

[0130] For example, the diversion channel A15 may include: multiple diversion main channels A15-1, and multiple diversion branch channels A15-2 for connecting the multiple diversion main channels A15-1. The overall extension direction of the diversion main channels A15-1 can be parallel to the first direction X, and the overall extension direction of the diversion branch channels A15-2 can be parallel to the second direction Y. The multiple diversion main channels A15-1 correspond to the multiple first main channels A11. One end of the multiple diversion main channels A15-1 is connected in parallel and connected to the liquid inlet component 216 of the liquid cooling plate 210; the other end of the multiple diversion main channels A15-1 is connected to the corresponding first main channels A11.

[0131] like Figure 16 For ease of description, arrows indicate the main flow channel A15-1, branch flow channels A15-2, and first flow channel A11, as well as the direction of cooling medium flow. Multiple main flow channels A15-1 are arranged in parallel. There may be three main flow channels A15-1, and there may be two first flow channels A11 in a liquid inlet flow channel region Q1 that communicate with the flow channel region Q3. These two first flow channels A11 are also arranged in parallel.

[0132] Thus, the fluid flowing from the liquid inlet component 216 passes through the branch channel network A15 and flows to the two liquid inlet channel areas Q1. This reduces the flow resistance between the liquid inlet component 216 and the liquid inlet channel areas Q1, increases the flow rate of the coolant in the fluid flow channels, and thus ensures a cooling effect. Furthermore, the multiple first main channels A11 between each liquid inlet channel area Q1 can be arranged in parallel. This also reduces the flow resistance of the flow channels within the liquid inlet channel area Q1 and increases the flow rate of the coolant in the liquid inlet channel area Q1.

[0133] Optionally, the flow channel base plate 212 further comprises third reinforcing ribs A2 distributed within the diversion region Q3. The third reinforcing ribs A2 can enhance the strength of the flow channel base plate 212 within the diversion region Q3. The third reinforcing ribs A2 have auxiliary grooves that are not connected to the flow channel groove A1. For example, the auxiliary grooves and the flow channel groove A1 can be integrally stamped.

[0134] For example, when the flow channel bottom plate 212 and the sealing flat plate 211 are connected by brazing, the flow channel bottom plate 212 may be provided with a plurality of exhaust holes H8 in areas other than the flow channel groove A1. The exhaust holes H8 can not only discharge the gas between the flow channel bottom plate 212 and the sealing flat plate 211, but also discharge the excess solder between the flow channel bottom plate 212 and the sealing flat plate 211.

[0135] Optionally, in the second direction Y, the maximum distance between the outlet flow channel area Q2 and the adjacent diverter area Q3 is greater than the maximum distance between the outlet flow channel area Q2 and the adjacent inlet flow channel area Q1. Furthermore, the portion of the flow channel bottom plate 212 between the outlet flow channel area Q2 and the adjacent diverter area Q3 abuts against the sealing plate 211. This isolates the diverter area Q3 from the outlet flow channel area Q2, preventing cross-flow between the diverter area Q3 and the outlet flow channel area Q2, and thereby ensuring the cooling effect of the liquid cooling plate 210.

[0136] For some possible implementations, see Figure 14 and Figure 17 , Figure 17 yes Figure 14 A partial enlarged view of the C3 region of the flow channel bottom plate is provided. The flow channel bottom plate 212 also has: multiple flow-disrupting convex hulls A3 distributed within the liquid outlet flow channel area Q2. Multiple second main flow channels A13 and multiple second branch flow channels A14 are distributed around the multiple flow-disrupting convex hulls A3.

[0137] The side of the spoiler convex hull A3 facing the sealing plate 211 abuts against the side of the sealing plate 211 facing the flow channel bottom plate 212 , and the side of the spoiler convex hull A3 facing away from the sealing plate 211 has a cavity.

[0138] Densely spaced convex hulls A3 are arranged within the liquid outlet channel region Q2 of the liquid cooling plate 210. These convex hulls A3 are used to turbulently flow the coolant, enhancing the coolant's turbulence, improving heat exchange efficiency, and further reducing temperature differences. These structures can change the coolant's flow pattern, increasing its contact area and duration with the channel wall. Compared to a laminar flow state in a liquid cooling plate without a turbulent design, the coolant in turbulent flow has more complete contact with the channel wall, making heat transfer more efficient, thereby removing more heat and significantly improving heat dissipation efficiency. It has been verified that the provision of a turbulent structure can effectively improve heat dissipation.

[0139] In a liquid cooling system, if the coolant doesn't flow smoothly, localized accumulation of gas or liquid can occur, a phenomenon known as trapped air and water. The turbulent flow design disrupts the coolant flow, distributing the gas and liquid more evenly throughout the flow channel, preventing localized accumulation and ensuring smooth coolant circulation for optimal heat dissipation.

[0140] The turbulent flow design changes the flow rate and direction of the coolant within the flow channel, allowing the coolant to be more evenly distributed throughout the flow channel space, allowing for more complete and uniform heat exchange with the heat-generating areas. This prevents localized overheating or overcooling and improves heat exchange uniformity across the entire liquid cold plate.

[0141] Optionally, the plurality of spoiler convex hulls A3 include: a plurality of rows of first-type spoiler convex hulls A31 and a plurality of rows of second-type spoiler convex hulls A32 arranged alternately along the first direction X, a row of the first-type spoiler convex hulls A31 includes: at least two first-type spoiler convex hulls A31 arranged along the second direction Y, and a row of the second-type spoiler convex hulls A32 includes: at least two second-type spoiler convex hulls A32 arranged along the second direction Y. Exemplarily, the number of first-type spoiler convex hulls A31 in a row of the first-type spoiler convex hulls A31 is four, and the number of second-type spoiler convex hulls A32 in a row of the second-type spoiler convex hulls A32 is three.

[0142] In particular, at least two first-type spoiler convex hulls A31 in a row of first-type spoiler convex hulls A31 and at least two second-type spoiler convex hulls A32 in a row of second-type spoiler convex hulls A32 are staggered in the second direction Y. In the embodiment of the present application, the spoiler convex hulls A3 arranged in a staggered manner achieve a spoiler effect, and by arranging them in the first direction X and the second direction Y, more spoiler convex hulls A3 can be provided in the liquid outlet channel region Q2, providing a better spoiler effect.

[0143] It should be noted that the staggered arrangement does not limit the staggered arrangement of the spoiler convex hulls A3 in the two rows of spoiler convex hulls A3, as long as the spoiler convex hulls A3 in the two adjacent rows are not exactly the same in number and are arranged in parallel.

[0144] In some possible implementations, in each row of spoiler convex hulls A3 , in the second direction Y, the distances between every two adjacent spoiler convex hulls A3 are the same.

[0145] For two adjacent rows of spoiler convex hulls A3 in the first direction, the number of spoiler convex hulls A3 in one row is greater than the number of spoiler convex hulls A3 in the other row. For example, the number of first-type spoiler convex hulls A31 in a row of first-type spoiler convex hulls A31 is greater than the number of second-type spoiler convex hulls A32 in a row of second-type spoiler convex hulls A32.

[0146] Optionally, in the first direction X, the size of the first type of spoiler convex hull A31 is greater than the size of the second type of spoiler convex hull A32. That is, the length of the first type of spoiler convex hull A31 is greater. And / or, in the second direction Y, the size of at least some of the first type of spoiler convex hulls A31 is smaller than the size of the second type of spoiler convex hull A32. That is, the width of at least some of the second type of spoiler convex hulls A32 is greater. Furthermore, at least two of the second type of spoiler convex hulls A3 have unequal widths in the second direction Y.

[0147] In the embodiment of the present application, the flow channel bottom plate 212 is formed by stamping to form the flow channel groove A1 and the spoiler convex hump A3; in other embodiments, the auxiliary groove of the third reinforcing rib A2 can also be stamped. The use of stamping can form a more complex and finer flow channel structure, which can make the coolant more evenly distributed in the liquid cooling plate 210 and fully contact with the heat-generating components, thereby improving the heat dissipation efficiency. In addition, the stamping process can achieve high-precision dimensional control, so that the dimensional accuracy of the liquid cooling plate 210 is higher and the consistency during mass production is better. This is very important for ensuring the assembly accuracy with other components and the stability of the heat dissipation effect.

[0148] For example, brazing is used to securely connect the flow channel base plate 212 and the sealing plate 211 in this embodiment of the present application. This brazing process provides the flow channel plate formed by the flow channel base plate 212 and the sealing plate 211 with greater connection strength and improved sealing performance, allowing it to withstand higher pressures and vibrations, thereby increasing the reliability and service life of the liquid cooling plate 210.

[0149] For example, in the embodiment of the present application, the flow channel base plate 212 and the sealing plate 211 can be made of a modified aluminum alloy (MOD) material, such as an aluminum-manganese alloy, such as AL-3003 MOD material. MOD materials can provide better performance, such as high hardness, high strength, and high wear resistance, good toughness and corrosion resistance, machinability, and can be improved through heat treatment.

[0150] Alternatively, refer to Figure 5 and Figure 18 , Figure 18yes Figure 2 A bottom view of the battery compartment is provided. The liquid cooling plate 210 also includes multiple insulation plates 218, which are connected to the side of the flow channel base plate 212 facing away from the sealing plate 211. In the first direction X, an insulation plate 218 is located between two adjacent first support beams B1. In other words, the insulation plates 218 contact the portion of the flow channel base plate 212 not covered by the support beams, that is, between the support beams in the support frame 213. This prevents condensation on the bottom of the flow channel base plate 212, thereby improving the safety of the battery compartment 000.

[0151] Alternatively, refer to Figure 2 and Figure 19 , Figure 19 yes Figure 2 A front view of a battery compartment is provided. The compartment cover 220 includes a top cover 221 and a side panel 222 fixedly connected to the outer edge of the top cover 221. The side panel 222 is annular, and the side of the side panel 222 facing away from the top cover 221 is sealed to the liquid cooling plate 210. The side panel 222 has a first opening K1 and a second opening K2 that communicate with the cavity. The first opening K1 and the second opening K2 are located on the same side of the battery compartment 000 in the first direction X. The top cover 221 and the side panel 222 can be a single-piece structure, for example, manufactured through a stamping process.

[0152] For example, the cover 220 can be made of hot-dip galvanized steel (SGCC). This steel has excellent corrosion resistance, preventing rust and corrosion on the steel surface, extending the service life of the battery compartment 000, and adapting to various operating environments. Hot-dip galvanized steel also has excellent formability, allowing it to be processed into various shapes through cold bending, shearing, stamping, and other methods to meet the diverse design and manufacturing requirements of the cover 220. Hot-dip galvanized steel also has excellent weldability and can be processed using various welding methods, facilitating connection and assembly with the liquid cooling plate 210. The high strength of hot-dip galvanized steel can withstand external impacts, thereby enhancing the protective effect of the cover 220 on the battery module 100.

[0153] To this end, when the box cover 220 is made of metal, the embodiment of the present application can be provided with a second insulating sheet 700 between the box cover 220 and the battery module 100. The second insulating sheet 700 can provide insulation and protection for the top of the battery module 100. For example, the second insulating sheet 700 has extensions on both sides in the second direction Y that extend along the thickness direction of the battery insert 000. These extensions can facilitate the placement of the second insulating sheet 700 on multiple battery modules 100, thereby improving structural stability and preventing misalignment.

[0154] The battery insert box 000 further includes: a sealing cover plate 400 , an interface cover plate 500 and a plurality of functional modules 600 .

[0155] Multiple functional modules 600 are located within the cavity and distributed around the first opening K1. At least one functional module 600 is connected to the battery module 100. Centralizing the functional modules 600 around the first opening K1 facilitates electrical connection of the functional modules 600 and avoids the need for bulky electrical connectors. The functional modules 600 may include, but are not limited to, a fuse 600a, a battery management system 600c, a combined detection module 600d, and a fire extinguishing module 600e.

[0156] The fuse 600a is connected to the input row 121 of the last battery module 100. Figure 2 Taking the battery plug box 000 as an example, the input bar 121 of the last battery module 100 faces the first opening K1, and the input bar 121 and the fuse 600a can be electrically connected through a smaller copper bar.

[0157] The battery management system 600c can utilize active balancing technology. This technology transfers power from battery cells 110 with higher power levels to battery cells 110 with lower power levels, making the power levels of each battery cell 110 in the battery module 100 more balanced. This improves the overall available power of the battery module 100, avoids limiting the use of the entire battery module 100 due to low power levels in some battery cells 110, and improves battery utilization. Active balancing technology also reduces overcharging and over-discharging, improves charge and discharge efficiency, and enhances battery pack stability and safety.

[0158] The composite detection module 600d is used to detect combustible gases. It integrates multiple detectors, such as smoke detectors, temperature detectors, and gas detectors, reducing the number of devices and installation space. This allows the composite detection module 600d to simultaneously detect multiple combustible gases and accurately identify the concentration of the target gas, avoiding the potential misjudgment that can occur with a single gas detector. The composite detection module 600d can also monitor changes in combustible gas concentrations and other related parameters in real time. Once an abnormal increase in gas concentration or other parameters exceed normal ranges, an early warning signal can be quickly issued, enabling immediate intervention. Therefore, the composite detection module 600d can improve the efficiency and accuracy of fire prevention.

[0159] The combined detection module 600d can communicate with the battery management system 600c and the fire extinguishing module 600e. When the combined detection module 600d detects an abnormality, such as a target gas concentration exceeding a set threshold, it sends a signal to the battery management system 600c and the fire extinguishing module 600e. In response to this signal, the battery management system 600c can cut off power, and the fire extinguishing module 600ec can automatically activate in response to this signal, effectively preventing the expansion of thermal runaway.

[0160] The fire extinguishing module 600e is an aerosol fire extinguishing module. When triggered, it releases an aerosol fire extinguishing medium. The aerosol fire extinguishing medium envelops the flame, effectively isolating it from oxygen and removing heat from the flame, achieving a cooling effect. This rapidly extinguishes the fire and prevents it from reigniting. The aerosol fire extinguishing module offers high fire extinguishing efficiency, achieves total flooding, isolates oxygen and reduces heat, is highly safe, is compact, and operates at atmospheric pressure.

[0161] The fire extinguishing module 600e realizes the fire extinguishing effect inside the box body 200. The present application can also set a nozzle on the sealing cover plate 400, so that the outside of the battery box 000 can use the nozzle to spray the fire extinguishing medium into the box body 200, thereby further improving the fire extinguishing efficiency and thus improving the safety of the battery box 000.

[0162] In the present application, the fuse 600a, the composite detection module 600d and the fire extinguishing module 600e can be installed on a mounting bracket, and the mounting bracket is fastened to the liquid cooling plate 210 by bolts, thereby improving the structural stability of the battery plug box 000.

[0163] The sealing cover plate 400 is sealed to the side plate 222 at the first opening K1. The sealing cover plate 400 is removable, facilitating maintenance and replacement of the multiple functional modules 600 through the first opening K1. For example, an annular waterproof silicone gasket can be positioned between the sealing cover plate 400 and the side plate 222 to enhance the sealing and waterproofing of the battery compartment 000 and, therefore, improve its suitability for various applications.

[0164] Optionally, the sealing cover plate 400 includes a cover plate body 410 and an annular connecting ring plate 420. The connecting ring plate 420 is distributed around the cover plate body 410 and fixedly connected to the outer edge of the cover plate body 410. The connecting ring plate 420 is fixedly connected to the side plate 222 at the first opening K1. The connecting ring plate 420 can be connected to the side plate 222 using bolts or other connecting members.

[0165] In a direction perpendicular to the cover plate body 410, the side of the sealing cover plate 400 facing away from the side plate 222 protrudes beyond the side of the connecting ring plate 420 facing away from the side plate 222. The side of the sealing cover plate 400 facing the side plate 222 includes a load-bearing slot. The portion of the functional module 600 extending through the first opening K1 is located within the load-bearing slot. The load-bearing slot of the sealing cover plate 400 can accommodate at least a portion of the functional module 600, avoiding the need to increase the overall size of the housing 200 to accommodate the functional module 600, thereby improving the tightness of the structural arrangement within the housing 200. For example, the battery management system 600c can be installed within the load-bearing slot of the sealing cover plate 400.

[0166] The interface cover 500 has multiple interfaces 510 connected to the functional module 600. These interfaces 510 are used for external connections and may include, but are not limited to, a main input terminal 511, a main output terminal 512, and a low-voltage communication interface 513. The battery management system 600c is connected to the low-voltage communication interface 513. A manual maintenance switch 600b may also be installed on the interface cover 500 to quickly disconnect the circuit in the event of a fault, anomaly, or the need for emergency maintenance. The main output terminal 512 is connected to the fuse 600a via the manual maintenance switch 600b.

[0167] The interface cover 500 is sealed to the side panel 222 at the second opening K2. For example, an annular waterproof silicone gasket can be provided between the interface cover 500 and the side panel 222 to enhance the sealing and waterproofing of the battery compartment 000 and thereby improve its applicability in various application environments.

[0168] Optionally, the top cover 221 has a plurality of convex bumps 221a on the side facing away from the liquid cooling plate 210, and each convex bump 221a has a groove connected to the cavity on the side facing the liquid cooling plate 210. The plurality of convex bumps 221a can form reinforcing ribs, thereby improving the structural strength of the top cover 221 to resist external impacts. Exemplarily, the plurality of convex bumps 221a can be arranged in an array in the first direction X and the second direction Y, and the shape of the convex bumps 221a can be hexagonal, which can improve the strength of the formed reinforcing ribs. In the embodiment of the present application, the plurality of convex bumps 221a can be manufactured by a stamping process.

[0169] Optionally, the battery compartment 000 further includes: multiple explosion-proof pressure relief valves 800. In the event of thermal runaway of the battery compartment 000, a large amount of gas will be generated inside the compartment 200. The exhaust speed of a single explosion-proof pressure relief valve 800 is limited. By providing multiple explosion-proof pressure relief valves 800, the pressure relief efficiency can be improved and the damage caused by thermal runaway can be mitigated. Furthermore, if one explosion-proof pressure relief valve 800 malfunctions and cannot function properly, the other explosion-proof pressure relief valves 800 can still function, ensuring that the pressure inside the battery compartment 000 can be released in a timely manner, thereby avoiding serious safety accidents. For example, the number of explosion-proof pressure relief valves 800 can be two, but the present application is not limited to this.

[0170] Multiple explosion-proof pressure relief valves 800 are installed on both sides of the side panel 222 in the second direction Y. These valves are evenly distributed in the first direction X near the first opening K1 and the second opening K2. This helps more precisely control the pressure balance within the battery compartment 000, ensuring a more uniform pressure distribution and reducing the impact of localized pressure surges or dips on battery performance and safety. Under varying operating conditions or environments, such as temperature, humidity, and charge / discharge rates, the multiple explosion-proof pressure relief valves 800 can work together to better meet the pressure relief requirements of the battery compartment 000 and ensure stable operation.

[0171] In an embodiment of the present application, a battery plug-in box can be applied to a battery energy storage system, such as a prefabricated energy storage cabin. At present, for a 20-foot high cabinet standard prefabricated cabin capable of storing 5 megawatt-hours (Mwh) of energy, the battery plug-in box used is generally a battery plug-in box composed of battery cells with a capacity of 314 ampere-hours (Ah). In a related technology, the battery cells in the battery plug-in box are grouped in a 1P104S manner, that is, a battery plug-in box includes 104 battery cells, and the battery plug-in box is composed of 8 battery modules, each of which includes 13 battery cells. Due to the excessive number of battery cells and battery modules, the performance consistency of the battery cells will be poor, and the thermal management of the battery plug-in box will be more complicated.

[0172] In some possible implementations, the present application can reduce the number of battery modules and battery cells in the battery box by increasing the capacity of a single battery cell. Figure 2Taking the battery compartment 000 shown as an example, the battery cells 110 in this compartment are grouped in a 1P52S configuration, meaning that one compartment 000 contains 52 battery cells. This compartment 000 is composed of four battery modules 100, each containing 13 battery cells. This improves the performance consistency of the battery cells 110, facilitating performance management of each battery cell 110. Furthermore, this reduces heat accumulation and minimizes temperature differences between battery cells 110. It also simplifies the heat conduction path between battery cells 110, facilitating thermal management of the battery compartment 000.

[0173] In summary, an embodiment of the present application provides a battery plug-in box, wherein a plurality of battery modules are arranged along a first direction and a second direction, and the first direction is the arrangement direction of a plurality of battery cells in the battery module. A plurality of battery modules are connected in series through a first connector and a second connector, wherein the first connector is located between two adjacent battery modules in the first direction and is connected to two transmission rows in the two battery modules. By setting the extension direction of the first connector to be parallel to the first direction, the extension direction of the first connector is the same as the arrangement direction of the plurality of battery cells. In this way, the size of the first connector can be made smaller, which not only improves the tightness of the arrangement of the plurality of battery modules in the first direction, thereby improving the energy density of the battery plug-in box, but also improves the stability of the first connector when the battery plug-in box is subjected to external impact or extrusion, thereby improving the reliability of the battery plug-in box.

[0174] In this application, the term "and / or" simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0175] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0176] In this application, the terms "first", "second", "third", "fourth", "fifth", "sixth" and "seventh" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise expressly limited.

[0177] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A battery plug box, characterized in that: The battery plug box includes: a box body, and a first connector, a second connector and a plurality of battery modules located in the box body; The plurality of battery modules are arranged in an array in a first direction and a second direction, the first direction and the second direction intersecting; the battery module comprises: an integrated busbar and a plurality of battery cells, the plurality of battery cells being arranged in the first direction, the integrated busbar being located on the plurality of battery cells, and the plurality of battery cells being connected via the integrated busbar, the integrated busbar having two transmission bars distributed on both sides of the battery module in the first direction; The first connecting member is located between two adjacent battery modules in the first direction and is connected to two transmission bars in the two battery modules; the second connecting member is located between two adjacent battery modules in the second direction and is connected to two transmission bars in the two battery modules; the multiple battery modules are connected in series via the first connecting member and the second connecting member; Wherein, the extending direction of the first connecting member is parallel to the first direction.

2. The battery plug box according to claim 1, characterized in that: The plurality of battery modules include: a first battery module and a second battery module, wherein the first battery module and the second battery module are adjacently distributed in the first direction; The transmission row on the side of the first battery module facing the second battery module is a first transmission row, and the transmission row on the side of the second battery module facing the first battery module is a second transmission row; the distribution position of the first transmission row in the second direction is the same as the distribution position of the second transmission row in the second direction; Wherein, two ends of the first connecting member are connected to the first transmission row and the second transmission row respectively.

3. The battery plug box according to claim 2, characterized in that: The battery cell has a first pole and a second pole arranged in the second direction; The battery cell closest to the second battery module in the first battery module is a first battery cell, and the battery cell closest to the second battery module in the second battery module is a second battery cell; the second electrode of the first battery cell and the first electrode of the second battery cell are arranged opposite to each other in the first direction; The first transmission bar is connected to the second pole of the first battery cell, and the second transmission bar is connected to the first pole of the second battery cell.

4. The battery plug box according to claim 3, characterized in that: The integrated busbar also includes: multiple connecting bars; for two adjacent battery cells in the same battery module, the first pole of one battery cell and the second pole of the other battery cell are arranged opposite to each other in the first direction, and the two ends of the connecting bar are respectively connected to the first pole of one battery cell and the second pole of the other battery cell.

5. The battery plug box according to claim 1, characterized in that: The multiple battery modules include: a third battery module and a fourth battery module, the third battery module and the fourth battery module are adjacently distributed in the second direction; the third battery module is the outermost battery module in a row of battery modules arranged in the first direction, and the transmission row of the third battery module on the side away from the other battery modules in the row of battery modules is a third transmission row; the fourth battery module is the outermost battery module in another row of battery modules arranged in the first direction, and the transmission row of the fourth battery module on the side away from the other battery modules in the another row of battery modules is a fourth transmission row; Wherein, two ends of the second connecting member are connected to the third transmission row and the fourth transmission row respectively.

6. The battery plug box according to any one of claims 1 to 5, characterized in that: The transmission row of the first battery module among the multiple battery modules, which is away from the adjacent battery module in the first direction, is used to: be connected to the total input end of the battery plug box; the transmission row of the last battery module among the multiple battery modules, which is away from the adjacent battery module in the first direction, is used to: be connected to the total output end of the battery plug box.

7. The battery plug box according to any one of claims 1 to 5, characterized in that: The battery module further includes: two end plates, the two end plates being respectively located on both sides of the plurality of battery cells in the first direction; The end plate has lifting holes, and the lifting holes are distributed on a side of the end plate facing the integrated busbar.

8. The battery plug box according to any one of claims 1 to 5, characterized in that: The box body comprises: a liquid cooling plate, and a box cover buckled on the liquid cooling plate; the liquid cooling plate and the box cover are sealed; The multiple battery modules are located on the liquid cooling plate and distributed in a cavity surrounded by the liquid cooling plate and the box cover.

9. The battery plug box according to claim 8, characterized in that: The liquid cooling plate comprises: a sealing plate, a flow channel bottom plate and a supporting frame; The sealing plate is located on a side of the battery module facing away from the box cover; The flow channel bottom plate is connected to a side of the sealing plate away from the battery module, the flow channel bottom plate has a plurality of flow channel grooves, the flow channel grooves are recessed in a direction away from the sealing plate, and the sealing plate and the plurality of flow channel grooves are used to enclose a fluid flow channel; The support frame is connected to a side of the flow channel bottom plate facing away from the sealing plate; the support frame comprises: a frame body and a plurality of first support beams; the plurality of first support beams are arranged in the first direction and are all fixedly connected to the frame body; Wherein, each of the first support beams has at least two first protrusions protruding toward the flow channel bottom plate, the first protrusions abut against the flow channel bottom plate, and the orthographic projection of the first protrusion on the sealing plate does not overlap with the orthographic projection of the flow channel groove on the sealing plate; there is a gap between the area of the first support beam other than the first protrusion and the flow channel bottom plate.

10. The battery plug box according to claim 9, characterized in that: The first support beam comprises: a first support beam body and the first protrusion, wherein the first protrusion has a cavity on a side facing away from the flow channel bottom plate; Wherein, the first support beam body and the first protrusion are an integrally stamped structure.

11. The battery plug box according to claim 9, characterized in that: The first support beam further includes: a plurality of first reinforcing ribs extending along the second direction, the plurality of first reinforcing ribs being arranged along the first direction; The at least two first protrusions include: two rows of first protrusions arranged along the first direction, each row of first protrusions includes at least one first protrusion, and the multiple first reinforcing ribs are distributed between the two rows of first protrusions.

12. The battery plug box according to claim 9, characterized in that: The support frame further includes: at least one second support beam, the second support beam being fixedly connected to the frame body, the second support beam being distributed between two adjacent first support beams in the first direction; Each of the second support beams has at least two second protrusions protruding toward the flow channel bottom plate, the second protrusions are connected to the flow channel bottom plate, and the orthographic projection of the second protrusions on the sealing plate does not overlap with the orthographic projection of the flow channel groove on the sealing plate; there is a gap between the area of the second support beam other than the second protrusions and the flow channel bottom plate.

13. The battery plug box according to claim 12, characterized in that: The second support beam comprises: a second support beam body and the second protrusion, wherein the second protrusion has a cavity on a side facing away from the flow channel bottom plate; Wherein, the second support beam body and the second protrusion are an integrally stamped structure.

14. The battery plug box according to claim 12, characterized in that: The second support beam further includes: a plurality of second reinforcing ribs extending along the second direction, the plurality of second reinforcing ribs being arranged along the first direction; The at least two second protrusions are arranged along the second direction, and at least part of the second reinforcing ribs are distributed between two adjacent second protrusions.

15. The battery plug box according to claim 12, characterized in that: The liquid cooling plate further includes: at least two third connecting members, and the second protrusion is connected to the flow channel bottom plate through the third connecting members.

16. The battery plug box according to claim 12, characterized in that: The support frame further includes: at least one third support beam, the extension direction of the third support beam being parallel to the first direction, the third support beam being located on a side of the first support beam and the second support beam facing the flow channel bottom plate, and the third support beam being fixedly connected to both the first support beam and the second support beam; The third support beam has a third protrusion protruding toward the flow channel bottom plate, the third protrusion is connected to the flow channel bottom plate, and the orthographic projection of the third protrusion on the sealing flat plate does not overlap with the orthographic projection of the flow channel groove on the sealing flat plate; there is a gap between the area of the third support beam other than the third protrusion and the flow channel bottom plate.

17. The battery plug box according to claim 16, characterized in that: The liquid cooling plate further includes: at least two fourth connecting members, and the third support beam is connected to the second support beam via the fourth connecting members.

18. The battery plug box according to claim 17, characterized in that: The second support beam further includes: a fourth protrusion protruding toward the third support beam, the fourth protrusion having a cavity on a side facing away from the flow channel bottom plate, and an orthographic projection of the fourth protrusion on the sealing flat plate overlapping with an orthographic projection of the third support beam on the sealing flat plate; Among them, the part of the third support beam that overlaps with the orthographic projection of the fourth protrusion has a first connecting hole, the fourth protrusion has a second connecting hole corresponding to the first connecting hole, and the fourth connecting member is connected to the flow channel bottom plate after passing through the first connecting hole and the corresponding second connecting hole.

19. The battery plug box according to any one of claims 9 to 18, characterized in that: The liquid cooling plate further comprises: a liquid inlet component and a liquid outlet component in communication with the fluid flow channel, wherein the liquid inlet component and the liquid outlet component are both arranged on the same side of the flow channel base plate in the first direction; the liquid cooling plate has: a liquid inlet flow channel area and a liquid outlet flow channel area arranged along the second direction, wherein the liquid inlet flow channel area is closer to the liquid inlet component in the second direction; The fluid flow channel includes: a plurality of first main flow channels and a plurality of first branch flow channels distributed in the liquid inlet flow channel area, and a plurality of second main flow channels and second branch flow channels distributed in the liquid outlet flow channel area; the first main flow channels are connected to the first branch flow channels, and the second main flow channels are connected to the second branch flow channels; Wherein, the overall extension directions of the first main channel and the second main channel are both parallel to the first direction.

20. The battery plug box according to claim 19, characterized in that: The number of the liquid inlet flow channel areas is at least two; the liquid cooling plate further comprises: at least two diversion areas corresponding to the at least two liquid inlet flow channel areas, the diversion areas being distributed in the first direction on a side of the corresponding liquid inlet flow channel area facing the liquid inlet component; The fluid flow channel further includes: diversion flow channels distributed in the diversion area, and the diversion flow channels in the diversion area are communicated with the first main flow channels in the corresponding liquid inlet flow channel area.

21. The battery plug box according to claim 20, characterized in that: The flow channel bottom plate further comprises: third reinforcing ribs distributed in the diversion area, the third reinforcing ribs having auxiliary grooves, and the auxiliary grooves are not connected to the flow channel grooves.

22. The battery plug box according to claim 20, characterized in that: In the second direction, the maximum distance between the liquid outlet flow channel area and the adjacent diversion area is greater than the maximum distance between the liquid outlet flow channel area and the adjacent liquid inlet flow channel area.

23. The battery plug box according to claim 19, characterized in that: The flow channel bottom plate further comprises: a plurality of flow-disrupting convex hulls distributed in the liquid outlet flow channel area; the plurality of second main flow channels and the plurality of second branch flow channels are distributed around the plurality of flow-disrupting convex hulls; The side of the spoiler convex hull facing the sealing plate abuts against the side of the sealing plate facing the flow channel bottom plate, and the side of the spoiler convex hull facing away from the sealing plate has a cavity.

24. The battery plug box according to claim 23, characterized in that: The plurality of spoiler convex hulls include: a plurality of rows of first-type spoiler convex hulls and a plurality of rows of second-type spoiler convex hulls alternately arranged along the first direction, a row of the first-type spoiler convex hull includes: at least two of the first-type spoiler convex hulls arranged along the second direction, and a row of the second-type spoiler convex hull includes: at least two of the second-type spoiler convex hulls arranged along the second direction; Wherein, at least two of the first-type spoiler convex hulls in a row of the first-type spoiler convex hulls are staggered in the second direction with at least two of the second-type spoiler convex hulls in a row of the second-type spoiler convex hulls.

25. The battery plug box according to claim 24, characterized in that: In the first direction, the size of the first type of spoiler convex hull is larger than that of the second type of spoiler convex hull. In the second direction, the size of at least part of the first type of spoiler convex hull is smaller than that of the second type of spoiler convex hull.

26. The battery plug box according to claim 19, characterized in that: The liquid cooling plate further includes: a plurality of insulation plates connected to a side of the flow channel bottom plate facing away from the sealing flat plate; in the first direction, one insulation plate is distributed between two adjacent first support beams.

27. The battery plug box according to claim 8, characterized in that: The box cover includes: a top cover, and a side plate fixedly connected to the outer edge of the top cover; the side plate is annular, and the side of the side plate facing away from the top cover is sealed to the liquid cooling plate; the side plate has a first opening and a second opening communicating with the cavity, and the first opening and the second opening are distributed on the same side of the battery compartment in the first direction; The battery plug box further includes: a sealing cover plate, an interface cover plate and a plurality of functional modules; The multiple functional modules are located in the cavity and distributed at the position of the first opening, and at least one of the functional modules is connected to the battery module; the sealing cover is sealed to the side panel at the first opening; the interface cover has multiple interfaces, which are connected to the functional modules, and the interface cover is sealed to the side panel at the second opening.

28. The battery plug box according to claim 27, characterized in that: The sealing cover plate comprises: a cover plate body and an annular connecting ring plate, wherein the connecting ring plate is distributed around the cover plate body and fixedly connected to the outer edge of the cover plate body, and the connecting ring plate is fixedly connected to the side plate at the first opening; In which, in a direction perpendicular to the cover plate body, the side of the sealing cover plate facing away from the side plate protrudes out from the side of the connecting ring plate facing away from the side plate, and the side of the sealing cover plate facing the side plate has a bearing groove body, and the part of the functional module extending through the first opening is located in the bearing groove body.

29. The battery plug box according to claim 27 or 28, characterized in that: The top cover has a plurality of convex humps on a side facing away from the liquid cooling plate, and each of the convex humps has a groove communicating with the cavity on a side facing the liquid cooling plate.

30. The battery plug box according to claim 27 or 28, characterized in that: The battery plug box further includes: a plurality of explosion-proof pressure relief valves, which are installed on both sides of the side plate in the second direction and are distributed near the first opening and the second opening in the first direction.

Images