Current collecting structure, temperature adjusting assembly and battery pack

Abstract

The invention provides a current collecting structure, a temperature adjusting assembly and a battery pack, the current collecting structure comprises a current collector, a first joint and a second joint, the current collector comprises a first plate body and a second plate body which are oppositely arranged, the first plate body and the second plate body are in sealed connection, and a current collecting cavity is formed; the first connector is arranged on the side, away from the second plate body, of the first plate body and comprises a first through hole communicating with the flow collecting cavity. The second connector is arranged on the side, away from the first plate body, of the second plate body and comprises a second through hole communicating with the flow collecting cavity. The first connector is used for being connected with the second connector of the other flow collecting structure so that the second through hole can communicate with the first through hole of the other flow collecting structure. The first plate body and the second plate body of the current collector are hermetically connected, so that the current collector can be produced and manufactured more conveniently, the production and manufacturing cost of the current collector is reduced, and the cost of the current collecting structure is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a current collecting structure, a temperature adjusting assembly and a battery pack. BACKGROUND

[0002] In the related art, a battery pack usually includes multiple rows of battery cells and a temperature adjusting assembly. The temperature adjusting assembly includes temperature adjusting plates arranged between adjacent two rows of battery cells, and a current collecting structure connected with the temperature adjusting plates. Adjacent temperature adjusting plates are connected through the current collecting structure, so that the temperature adjusting medium is distributed to different temperature adjusting plates through the current collecting structure, and the battery cells of the battery pack are cooled or heated through the temperature adjusting plates.

[0003] However, the current collector used for connecting the temperature adjusting plate is usually an integral structure, which has a high production cost, thereby increasing the production cost of the current collecting structure. SUMMARY

[0004] Embodiments of the present application provide a current collecting structure, a temperature adjusting assembly and a battery pack, which can improve the technical problem of high production cost of the current collector of the current collecting structure.

[0005] In a first aspect, embodiments of the present application provide a current collecting structure, comprising:

[0006] A current collector includes a first plate body and a second plate body arranged oppositely, and the first plate body and the second plate body are sealingly connected and form a current collecting cavity;

[0007] A first connector is arranged on a side of the first plate body away from the second plate body, and the first connector includes a first through hole in communication with the current collecting cavity;

[0008] A second connector is arranged on a side of the second plate body away from the first plate body, and the second connector includes a second through hole in communication with the current collecting cavity; and the first connector is used for connecting the second connector of another current collecting structure, so that the second through hole is in communication with the first through hole of another current collecting structure.

[0009] In an embodiment, the first plate body and the second plate body are bonded or welded, so that the first plate body and the second plate body are sealingly connected; or,

[0010] A sealing member is arranged between the first plate body and the second plate body, and the first plate body and the second plate body are connected to each other and clamp the sealing member, so that the first plate body and the second plate body are sealingly connected. In this way, the sealing connection of the first plate body and the second plate body can be more simple and convenient.

[0011] In an embodiment, the first plate body is provided with a connecting structure on the side away from the second plate body, the first connector comprises a connecting portion, and the connecting portion is movably connected with the connecting structure; a sealing ring is arranged between the first connector and the first plate body, the sealing ring is arranged around the first through hole, and the first connector and the first plate body clamp the sealing ring to form a sealing protection structure. By movably connecting the first connector with the current collector and arranging the sealing ring between the first connector and the first plate body to form a sealing protection structure between the first connector and the first plate body, the position of the first connector relative to the current collector can be adjusted, and the temperature adjustment medium in the current collecting cavity and the first through hole cannot leak out of the gap between the first connector and the first plate body. When the first connector is connected with the second connector of another current collecting structure to make the second through hole communicate with the first through hole of another current collecting structure, the position of the first connector can be adjusted adaptively according to the relative position of the first connector and the second connector of another current collector, so that the first connector can be accurately connected with the second connector of another current collector, the assembly precision requirement of the first connector and the second connector of another current collector is reduced, the cost of the battery pack is reduced, and the assembly efficiency of the battery pack is improved.

[0012] In an embodiment, the first connector can move in the radial direction of the first through hole relative to the connecting structure. When the first connector is connected with the second connector of another current collecting structure to make the second through hole communicate with the first through hole of another current collecting structure, if the first connector and the second connector of another current collecting structure are misaligned in the radial direction of the first through hole, the first connector can be moved in the radial direction of the first through hole relative to the connecting structure by a certain distance, so that the first connector and the second connector of another current collecting structure are aligned, and the first connector and the second connector of another current collecting structure can be quickly and accurately connected together; and / or,

[0013] The first connector can swing in the radial direction of the first through hole relative to the connecting structure. When the first connector is connected with the second connector of another current collecting structure to make the second through hole communicate with the first through hole of another current collecting structure, if the first connector and the second connector of another current collecting structure are inclined by a certain angle in the radial direction of the first through hole, the first connector can swing in the radial direction of the first through hole relative to the connecting structure by a certain angle, so that the first connector and the second connector of another current collecting structure are aligned, and the first connector and the second connector of another current collecting structure can be quickly and accurately connected together; and / or,

[0014] The first joint can move relative to the connecting structure in the axial direction of the first through hole. When the first joint is connected with the second joint of the other current collecting structure to make the second through hole communicate with the first through hole of the other current collecting structure, if the distance between the first joint and the second joint of the other current collecting structure in the axial direction of the first through hole is far, the first joint can move relative to the connecting structure in the axial direction of the first through hole by a certain distance, so that the first joint and the second joint of the other current collecting structure can be quickly and accurately connected together.

[0015] In an embodiment, the connecting structure comprises a limiting piece connected with the first plate body, the limiting piece is located on the side of the connecting part away from the first plate body, and the limiting piece is used to abut against the side of the connecting part away from the first plate body to make the connecting part and the first plate body clamp the sealing ring. In this way, the limiting piece can apply a pushing force to the connecting part to make the connecting part clamp the sealing ring together with the first plate body. Moreover, the connecting part can also move and swing in the radial direction of the first through hole of the first joint relative to the connecting structure, and can also move in the axial direction of the first through hole by a certain distance, so that the first joint can move and swing in the radial direction of the first through hole relative to the connecting structure, and can also move in the axial direction of the first through hole.

[0016] In an embodiment, the connecting structure further comprises a connecting protrusion protruding from the side of the first plate body away from the second plate body, the connecting protrusion encloses a groove, the bottom surface of the groove is provided with an interface communicating with the current collecting cavity, the connecting part is at least partially accommodated in the groove, the first through hole communicates with the interface, and the limiting piece is connected with the connecting protrusion to make the connection between the limiting piece and the first plate body more convenient, and the limiting piece can be located on the side of the connecting part of the first joint away from the first plate body to stably limit the connecting part.

[0017] In an embodiment, the limiting piece is welded or bonded with the connecting protrusion to make the connection strength between the limiting piece and the connecting protrusion higher and the structure simpler.

[0018] In an embodiment, the limiting piece is arranged around the periphery of the first joint, the limiting piece is provided with an avoiding hole for the first joint to pass through, the first joint comprises a matching section located in the avoiding hole, and the inner diameter of the avoiding hole is greater than the outer diameter of the matching section. In this way, the limiting piece can abut against the surface of the side of the connecting part away from the current collector with more area, so that the limiting piece can abut against the first joint more stably. Moreover, the avoiding hole has a space for the matching section to move and swing in the radial direction of the first through hole, so that the first joint can move and swing in the radial direction of the first through hole relative to the connecting structure.

[0019] In an embodiment, the outer diameter of the connecting portion is greater than the inner diameter of the avoiding hole. In this way, the limiting member can be more stably abutted against the side of the connecting portion away from the current collector, and the connecting portion can be prevented from being pulled out of the avoiding hole.

[0020] In an embodiment, the connecting portion is located at one end of the first joint close to the first plate body, and the first through hole penetrates through the connecting portion; the sealing ring is located between the connecting portion and the first plate body, and the connecting portion and the first plate body clamp the sealing ring. By clamping the sealing ring between the connecting portion and the first plate body, the gap between the first joint and the first plate body can be effectively sealed.

[0021] In an embodiment, a containing groove is formed on the side of the connecting portion facing the first plate body, the containing groove is arranged around the periphery of the first through hole, and a part of the sealing ring is contained in the containing groove. In this way, the containing groove can play a certain positioning role on the sealing ring, so that the position of the sealing ring relative to the connecting portion is more stable, and the sealing stability of the sealing ring can be improved.

[0022] In an embodiment, the connecting portion is provided with a via hole extending along the length direction of the first through hole, the via hole is in communication with the containing groove, a connecting section is arranged in the via hole, and the connecting section is connected with the sealing ring. In this way, the connection between the sealing ring and the connecting portion can be more stable, and the sealing ring is less likely to fall off the connecting portion.

[0023] In an embodiment, the compression ratio of the sealing ring is greater than or equal to 8% and less than or equal to 42%, so that the sealing ring has higher sealing effect and sealing stability.

[0024] In an embodiment, the compression ratio of the sealing ring is greater than or equal to 15% and less than or equal to 30%, so that the sealing effect of the sealing ring is better, and the sealing time is longer.

[0025] In an embodiment, at least two clamping portions are protrudingly arranged on the side of the first plate body away from the second body, and the at least two clamping portions are arranged along the circumferential direction of the first joint; the at least two clamping portions are used for clamping with the second joint of another current collecting structure. In this way, the connection between the first joint and the second joint of another current collecting structure can be more stable.

[0026] In an embodiment, the outer circumferential surface of the second joint is provided with a flange, the clamping portion comprises an abutting portion, when the first joint is connected with the second joint of another current collecting structure, the abutting portion is located on the side of the flange away from the first plate body, so that the at least two clamping portions are clamped with the second joint of another current collecting structure. By abutting the abutting portion with the flange of the second joint of another current collecting structure, the movement of the second joint of another current collecting structure away from the corresponding first joint can be limited, so that the connection between the first joint and the second joint of another current collecting structure is more stable. Moreover, when the abutting portion and the corresponding flange have a certain interval in the axial direction of the first through hole, the relative position of the first joint and the second joint of another current collecting structure in the axial direction of the first through hole can also be adjusted, so as to reduce the assembly precision requirement.

[0027] In an embodiment, in the axial direction of the first through hole, the maximum distance between the abutting portion of the current collecting structure and the flange of another current collecting structure is less than or equal to 2 mm, so that the first joint of the current collecting structure and the second joint of another current collecting structure have a larger adjustment space in the axial direction of the first through hole, and the assembly precision requirement when the first joint of the current collecting structure is connected with the second joint of another current collecting structure is lower.

[0028] In a second aspect, embodiments of the present application provide a temperature adjusting assembly, comprising:

[0029] a temperature adjusting plate, wherein a flow channel is arranged in the temperature adjusting plate;

[0030] a current collecting structure, the current collecting structure is the current collecting structure as described above, the current collecting structure comprises a current collecting body, a first joint and a second joint, the current collecting body comprises a first plate body and a second plate body arranged oppositely, the first plate body and the second plate body are sealingly connected and form a current collecting cavity, one end of the temperature adjusting plate is connected with the current collecting body of the current collecting structure, so that the flow channel and the current collecting cavity are in communication; the first joint is arranged on the side of the first plate body away from the second plate body, the first joint comprises a first through hole in communication with the current collecting cavity; the second joint is arranged on the side of the second plate body away from the first plate body, the second joint comprises a second through hole in communication with the current collecting cavity; the first joint is used for being connected with the second joint of another current collecting structure, so that the second through hole and the first through hole of another current collecting structure are in communication.

[0031] In a third aspect, embodiments of the present application provide a battery pack, comprising:

[0032] a cell assembly, comprising a plurality of rows of cells;

[0033] The temperature adjusting assembly is the temperature adjusting assembly as described above, and the temperature adjusting plate of the temperature adjusting assembly is arranged between two adjacent rows of the battery cells.

[0034] The embodiments of the present application have the following beneficial effects:

[0035] The current collecting structure provided by the embodiments of the present application comprises the first plate body and the second plate body arranged oppositely, the first plate body and the second plate body form the current collecting cavity, the first joint is arranged on the side of the first plate body away from the second plate body, the second joint is arranged on the side of the second plate body away from the first plate body, the first through hole of the first joint and the second through hole of the second joint are communicated with the current collecting cavity respectively, the first joint of the current collecting structure is used to connect with the second joint of another current collecting structure, so that the second through hole is communicated with the first through hole of another current collecting structure, thereby the current collecting cavities of the current collectors of two current collecting structures are communicated. When the current collector of the current collecting structure is connected with one end of the corresponding temperature adjusting plate, and the current collecting cavity of the current collector is communicated with the flow channel of the corresponding temperature adjusting plate, the temperature adjusting medium can be provided to the flow channel of the temperature adjusting plate through the current collecting structure, or the temperature adjusting medium in the flow channel of the temperature adjusting plate flows into the current collecting structure.

[0036] On this basis, compared with the current collector arranged as an integrated structure in the related art, by sealingly connecting the first plate body and the second plate body of the current collector, the current collector can be divided into the first plate body and the second plate body independent of each other for production and manufacturing, and then the first plate body and the second plate body are sealingly connected to form the current collector, so that the production and manufacturing of the current collector are more convenient, and the production and manufacturing cost of the current collector is reduced, thereby the cost of the current collecting structure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0038] Figure 1 The structural schematic diagram of one embodiment of the battery pack provided by the embodiments of the present application;

[0039] Figure 2 The cooperation structural schematic diagram of the battery cell and the temperature adjusting assembly provided by the embodiments of the present application;

[0040] Figure 3 The structural schematic diagram of one embodiment of the current collecting structure provided by the embodiments of the present application;

[0041] Figure 4An exploded structural schematic view of one embodiment of the current collecting structure provided by the embodiments of the present application;

[0042] Figure 5 For Figure 3 A sectional view along the direction A-A;

[0043] Figure 6 A structural schematic view when the first joint of the current collecting structure provided by the embodiments of the present application is connected with the second joint of another current collecting structure;

[0044] Figure 7 A structural schematic view of one embodiment of the first joint and the sealing ring provided by the embodiments of the present application.

[0045] Legend of reference signs:

[0046] 1-battery pack; 10-temperature adjusting assembly; 11-current collecting structure; 110-current collector; 1110-current collecting cavity; 111-first plate body; 1112-connection structure; 1113-limiting piece; 1114-avoidance hole; 1115-connection protrusion; 1116-groove; 1117-clamping part; 1118-abutment part; 1119-joint; 112-second plate body; 113-first joint; 1131-first through hole; 1132-connection part; 1133-receiving groove; 1134-via hole; 1136-mating section; 115-second joint; 1151-flange; 1152-second through hole; 1141-sealing ring; 1142-annular sealing piece; 1143-connection section; 12-temperature adjusting plate; 121-flow channel; 2-cell assembly; 20-cell; 30-box; H-maximum distance. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the drawing direction in the drawings; and "inner" and "outer" refer to the contour of the device.

[0048] The embodiments of the present application provide a current collecting structure, a temperature adjusting assembly and a battery pack. The following will be described in detail respectively.

[0049] Figure 1A structural schematic diagram of one embodiment of the battery pack provided by the embodiments of the present application. Figure 2 A cooperation structural schematic diagram of the battery cell and the temperature adjusting assembly provided by the embodiments of the present application. Figure 1 and Figure 2 As shown in the drawings, the battery pack 1 comprises a battery cell assembly 2 and a temperature adjusting assembly 10, the battery cell assembly 2 comprises a plurality of battery cells 20, and the temperature adjusting assembly 10 exchanges heat with the outer circumferential surface of the battery cells 20 to adjust the temperature of the plurality of battery cells 20, so that the plurality of battery cells 20 are at a suitable working temperature.

[0050] It should be noted that the temperature adjusting assembly 10 can heat the plurality of battery cells 20, or can cool the plurality of battery cells 20, which can be determined according to the ambient temperature of the internal temperature meter of the battery pack 1.

[0051] The battery cell assembly 2 can comprise a plurality of rows of battery cells 20, and the temperature adjusting assembly 10 comprises a temperature adjusting plate 12 and a flow collecting structure 11, the temperature adjusting plate 12 is provided with a flow channel 121, the flow collecting structure 11 is connected with the temperature adjusting plate 12, and two adjacent temperature adjusting assemblies 10 are connected through the flow collecting structure 11, so that the temperature adjusting medium is distributed to the flow channels 121 of different temperature adjusting plates 12 through the flow collecting structure 11, and the battery cells 20 of the battery pack 1 are exchanged through the temperature adjusting plate 12 to cool or heat the battery cells 20. The temperature adjusting medium can be a cooling liquid, a refrigerant, etc., which is not limited here.

[0052] Specifically, the battery pack 1 comprises a box body 30, and the battery cell assembly 2 and the temperature adjusting assembly 10 are arranged in the box body 30. The temperature adjusting assembly 10 is arranged between two adjacent rows of battery cells 20 of the battery cell assembly 2. The temperature adjusting plate 12 of the temperature adjusting assembly 10 is located between the two adjacent rows of battery cells 20. The temperature adjusting plate 12 is in contact with the outer circumferential surface of the two adjacent rows of battery cells 20 directly or through a heat conducting layer. After the temperature adjusting medium flows into the flow channel 121 of the temperature adjusting plate 12 through the flow collecting structure 11, the temperature adjusting medium exchanges heat with the battery cells 20 through the temperature adjusting plate 12 to cool or heat the battery cells 20.

[0053] In order to reduce the production cost of the flow collecting structure 11, the embodiments of the present application provide a flow collecting structure 11.

[0054] As shown in the drawings, Figure 3 and Figure 6As shown, the current collecting structure 11 includes a current collector 110, a first joint 113 and a second joint 115, the first joint 113 and the second joint 115 are located on two sides of the current collector 110, the current collector 110 is formed with a current collecting cavity 1110, the first joint 113 includes a first through hole 1131 in communication with the current collecting cavity 1110, the second joint 115 includes a second through hole 1152 in communication with the current collecting cavity 1110, one end of the temperature adjusting plate 12 is connected with the current collector 110 to communicate the flow channel 121 in the temperature adjusting plate 12 with the current collecting cavity 1110 of the current collector 110, so that the temperature adjusting medium in the current collecting cavity 1110 of the current collector 110 can flow into the flow channel 121 in the temperature adjusting plate 12, or the temperature adjusting medium in the flow channel 121 of the temperature adjusting plate 12 flows into the current collecting cavity 1110 of the current collector 110.

[0055] The first joint 113 of the current collecting structure 11 is used to connect with the second joint 115 of another current collecting structure 11 to communicate the second through hole 1152 with the first through hole 1131 of another current collecting structure 11, so that the current collecting cavities 1110 of the current collectors 110 of the two current collecting structures 11 connected with each other are communicated, and the two temperature adjusting assemblies 10 are connected in parallel or in series through the current collecting structure 11.

[0056] In some embodiments, the current collector 110 of the current collecting structure 11 can include a first plate body 111 and a second plate body 112 arranged oppositely, the first plate body 111 and the second plate body 112 are sealingly connected and formed with the current collecting cavity 1110. The first joint 113 is arranged on the side of the first plate body 111 away from the second plate body 112, and the first joint 113 includes the first through hole 1131 in communication with the current collecting cavity 1110. The second joint 115 is arranged on the side of the second plate body 112 away from the first plate body 111, and the second joint 115 includes the second through hole 1152 in communication with the current collecting cavity 1110. The first joint 113 is used to connect with the second joint 115 of another current collecting structure 11 to communicate the second through hole 1152 with the first through hole 1131 of another current collecting structure 11.

[0057] The current application provides a current collecting structure 11. The current collecting structure 11 comprises a current collector 110, a first connector 113 and a second connector 115. The current collector 110 comprises a first plate body 111 and a second plate body 112. The first plate body 111 and the second plate body 112 are oppositely arranged and form a current collecting cavity 1110. The first plate body 111 is provided with the first connector 113 on a side away from the second plate body 112. The second plate body 112 is provided with the second connector 115 on a side away from the first plate body 111. A first through hole 1131 of the first connector 113 and a second through hole 1152 of the second connector 115 are respectively in communication with the current collecting cavity 1110. The first connector 113 of the current collecting structure 11 is used to connect with the second connector 115 of another current collecting structure 11, so that the second through hole 1152 is in communication with the first through hole 1131 of the other current collecting structure 11, thereby connecting the current collecting cavities 1110 of the current collectors 110 of the two current collecting structures 11. When the current collector 110 of the current collecting structure 11 is connected with one end of a corresponding temperature adjusting plate 12, the current collecting cavity 1110 of the current collector 110 is in communication with a flow channel 121 of the corresponding temperature adjusting plate 12, so that the temperature adjusting plate 12 can be supplied with temperature adjusting medium through the current collecting structure 11, or the temperature adjusting medium in the flow channel 121 of the temperature adjusting plate 12 can flow into the current collecting structure 11.

[0058] On this basis, compared with the current collector 110 being arranged as an integrated structure in the related art, the first plate body 111 and the second plate body 112 of the current collector 110 are sealingly connected, so that the current collector 110 can be produced and manufactured as the first plate body 111 and the second plate body 112 which are independent of each other, and then the first plate body 111 and the second plate body 112 are sealingly connected to form the current collector 110, thereby making the production and manufacturing of the current collector 110 more convenient and reducing the production and manufacturing cost of the current collector 110, and further reducing the cost of the current collecting structure 11.

[0059] In some embodiments, the first plate body 111 and the second plate body 112 can be bonded or welded to be sealingly connected, so that the sealing connection of the first plate body 111 and the second plate body 112 is more stable and convenient.

[0060] In other embodiments, a sealing member can be arranged between the first plate body 111 and the second plate body 112. The first plate body 111 and the second plate body 112 are connected to each other and clamp the sealing member, so that the first plate body 111 and the second plate body 112 are sealingly connected. In this way, the sealing connection of the first plate body 111 and the second plate body 112 can be relatively stable and convenient to some extent.

[0061] The first plate body 111 and the second plate body 112 can be connected by bolts, buckles or other ways. The sealing member can be annular or other shapes, which are not limited herein.

[0062] In some embodiments, the first connector 113 can be inserted into the second through hole 1152 of the second connector 115 of the other current collecting structure 11, so as to connect the first connector 113 with the second connector 115 of the other current collecting structure 11.

[0063] In some embodiments, as shown in FIG. 1, the first connector 113 can be inserted into the second through hole 1152 of the second connector 115 of the other current collecting structure 11, so as to connect the first connector 113 with the second connector 115 of the other current collecting structure 11.

[0064] In some embodiments, as shown in FIG. 1, the first connector 113 can be inserted into the second through hole 1152 of the second connector 115 of the other current collecting structure 11, so as to connect the first connector 113 with the second connector 115 of the other current collecting structure 11.

[0065] In some embodiments, as shown in FIG. 1, the first connector 113 can be inserted into the second through hole 1152 of the second connector 115 of the other current collecting structure 11, so as to connect the first connector 113 with the second connector 115 of the other current collecting structure 11. Figure 4 Figure 5 In some embodiments, as shown in FIG. 1, the first connector 113 can be inserted into the second through hole 1152 of the second connector 115 of the other current collecting structure 11, so as to connect the first connector 113 with the second connector 115 of the other current collecting structure 11.

[0066] ​By making the first connector movable relative to the current collector 110, and providing a sealing ring 1141 between the first connector 113 and the first plate body 111 to form a sealing protection structure between the first connector 113 and the first plate body 111, when the position of the first connector 113 relative to the current collector 110 is adjustable, the temperature adjusting medium in the current collecting cavity 1110 and the first through hole 1131 will not leak out from the gap between the first connector 113 and the first plate body 111. When the first connector 113 is connected with the second connector 115 of another current collecting structure 11 to make the second through hole 1152 communicate with the first through hole 1131 of another current collecting structure 11, the position of the first connector 113 can be adjusted adaptively according to the relative position of the first connector 113 and the second connector 115 of another current collecting structure 11, so that the first connector 113 can be accurately connected with the second connector 115 of another current collecting structure 11, which reduces the assembly precision requirement of the first connector 113 and the second connector 115 of another current collecting structure 11, is beneficial to reduce the cost of the battery pack 1 and improve the assembly efficiency of the battery pack 1.

[0067] In some embodiments, the first connector 113 can be moved relative to the connecting structure 1112 in the radial direction of the first through hole 1131. When the first connector 113 is connected with the second connector 115 of another current collecting structure 11 to make the second through hole 1152 communicate with the first through hole 1131 of another current collecting structure 11, if the first connector 113 and the second connector 115 of another current collecting structure 11 are misaligned in the radial direction of the first through hole 1131, the first connector 113 can be moved relative to the connecting structure 1112 in the radial direction of the first through hole 1131 by a certain distance, so that the first connector 113 and the second connector 115 of another current collecting structure 11 can be aligned, so that the first connector 113 and the second connector 115 of another current collecting structure 11 can be quickly and accurately connected together.

[0068] It should be noted that the movement of the first connector 113 relative to the connecting structure 1112 in the radial direction of the first through hole 1131 means that the whole first connector 113 moves relative to the connecting structure 1112 in the radial direction of the first through hole 1131.

[0069] In addition, the first joint 113 can also be allowed to swing in the radial direction of the first through hole 1131 relative to the connecting structure 1112. When the first joint 113 is connected with the second joint 115 of the other current collecting structure 11 to make the second through hole 1152 communicate with the first through hole 1131 of the other current collecting structure 11, if the first joint 113 and the second joint 115 of the other current collecting structure 11 are inclined at a certain angle in the radial direction of the first through hole 1131, the first joint 113 can be allowed to swing at a certain angle in the radial direction of the first through hole 1131 relative to the connecting structure 1112, so as to align the first joint 113 with the second joint 115 of the other current collecting structure 11, and make the first joint 113 and the second joint 115 of the other current collecting structure 11 be quickly and accurately connected together.

[0070] It should be noted that the swinging of the first joint 113 in the radial direction of the first through hole 1131 relative to the connecting structure 1112 means that the first joint 113 is deflected at a certain angle in the radial direction of the first through hole 1131 relative to the connecting structure 1112, that is, when the first joint 113 swings in the radial direction of the first through hole 1131 relative to the connecting structure 1112, different parts of the first joint 113 produce different displacements in the radial direction of the first through hole 1131 relative to the connecting structure 1112.

[0071] In addition, the first joint 113 can also be allowed to move in the axial direction of the first through hole 1131 relative to the connecting structure 1112. When the first joint 113 is connected with the second joint 115 of the other current collecting structure 11 to make the second through hole 1152 communicate with the first through hole 1131 of the other current collecting structure 11, if the first joint 113 and the second joint 115 of the other current collecting structure 11 are far away in the axial direction of the first through hole 1131, the first joint 113 can be allowed to move at a certain distance in the axial direction of the first through hole 1131 relative to the connecting structure 1112, so as to make the first joint 113 and the second joint 115 of the other current collecting structure 11 be quickly and accurately connected together.

[0072] It should be noted that the movement of the first joint 113 in the axial direction of the first through hole 1131 relative to the connecting structure 1112 means that the whole first joint 113 moves in the axial direction of the first through hole 1131 relative to the connecting structure 1112.

[0073] In addition, in the present application, the first joint 113 can be allowed to move in one or more of the above three movement modes relative to the connecting structure 1112, which can be determined according to the accuracy requirement of the connection between the first joint 113 and the second joint 115 of the other current collecting structure 11.

[0074] In some embodiments, as Figures 3 to 5As shown, the connecting structure 1112 includes a limiting piece 1113 connected with the first plate body 111. The limiting piece 1113 is located on the side of the connecting part 1132 away from the first plate body 111. The limiting piece 1113 is used to abut against the side of the connecting part 1132 away from the first plate body 111, so as to clamp the sealing ring 1141 between the connecting part 1132 and the first plate body 111. In this way, the limiting piece 1113 can apply a pushing force to the connecting part 1132, so as to clamp the sealing ring 1141 between the connecting part 1132 and the first plate body 111. Moreover, the connecting part 1132 can move and swing in the radial direction of the first through hole 1131 of the first joint 113 relative to the connecting structure 1112, and can also move a certain distance in the axial direction of the first through hole 1131, so that the first joint 113 can move and swing in the radial direction of the first through hole 1131 relative to the connecting structure 1112, and can also move in the axial direction of the first through hole 1131.

[0075] In some embodiments, the limiting piece 1113 can be arranged around the periphery of the first joint 113. In this way, the limiting piece 1113 can have more area to abut against the surface of the side of the connecting part 1132 away from the current collector 110, so that the limiting piece 1113 can more stably abut against the first joint 113.

[0076] In some embodiments, the limiting piece 1113 is provided with an avoiding hole 1114 through which the first joint 113 passes. The first joint 113 includes a fitting section 1136 located in the avoiding hole 1114, and the inner diameter of the avoiding hole 1114 is greater than the outer diameter of the fitting section 1136. In this way, the avoiding hole 1114 has a space for the fitting section 1136 to move and swing in the radial direction of the first through hole 1131, so that the first joint 113 can move and swing in the radial direction of the first through hole 1131 relative to the connecting structure 1112.

[0077] In some embodiments, the outer diameter of the connecting part 1132 can be greater than the inner diameter of the avoiding hole 1114. In this way, the limiting piece 1113 can more stably abut against the side of the connecting part 1132 away from the current collector 110, and the connecting part 1132 can be prevented from coming out of the avoiding hole 1114.

[0078] In some embodiments, as shown in FIG. 11B, the limiting piece 1113 can be arranged on the side of the connecting part 1132 away from the first plate body 111. Figures 3 to 5As shown, the connecting structure 1112 can further include a connecting protrusion 1115 protruding from the first plate body 111 away from the second plate body 112, the connecting protrusion 1115 being enclosed to form a recess 1116, the recess 1116 having an interface 1119 open at a bottom surface thereof and in communication with the current collecting cavity 1110, the connecting portion 1132 being at least partially accommodated in the recess 1116, the first through hole 1131 being in communication with the interface 1119, and the limiting member 1113 being connected to the connecting protrusion 1115 to facilitate the connection of the limiting member 1113 to the first plate body 111, and the limiting member 1113 being capable of being located at a side of the connecting portion 1132 of the first connector 113 away from the first plate body 111 to stably limit the connecting portion 1132.

[0079] The limiting member 1113 can be welded or bonded to the connecting protrusion 1115 to have a higher connection strength and a simpler structure. Of course, the limiting member 1113 can also be connected to the connecting protrusion 1115 by screwing, clamping or other means.

[0080] Specifically, the connecting protrusion 1115 is an annular protrusion arranged around the periphery of the first connector 113. The connecting portion 1132 is accommodated in the recess 1116 of the connecting protrusion 1115. In the axial direction of the first through hole 1131 of the first connector 113, the thickness of the connecting portion 1132 is less than the depth of the recess 1116. The limiting member 1113 is an annular plate structure arranged around the first connector 113. The outer edge of the limiting member 1113 is connected to an end of the connecting protrusion 1115 away from the current collector 110 and covers the recess 1116 enclosed by the connecting protrusion 1115.

[0081] In some embodiments, as shown in Figure 5 and Figure 7 The connecting portion 1132 is located at an end of the first connector 113 close to the first plate body 111, and the first through hole 1131 penetrates through the connecting portion 1132. The sealing ring 1141 is located between the connecting portion 1132 and the first plate body 111, and the connecting portion 1132 and the first plate body 111 clamp the sealing ring 1141. In this way, by clamping the sealing ring 1141 between the connecting portion 1132 and the first plate body 111, the gap between the first connector 113 and the first plate body 111 can be effectively sealed.

[0082] In some embodiments, as shown in Figure 5 and Figure 7As shown, the connecting portion 1132 is provided with a containing groove 1133 on the side of the first plate body 111, the containing groove 1133 is arranged around the first through hole 1131, and a part of the sealing ring 1141 is contained in the containing groove 1133. In this way, the containing groove 1133 can play a certain positioning role on the sealing ring 1141, so that the position of the sealing ring 1141 relative to the connecting portion 1132 is more stable, which is beneficial to improve the sealing stability of the sealing ring 1141.

[0083] In some embodiments, the connecting portion 1132 can be provided with a via hole 1134 extending along the length direction of the first through hole 1131, the via hole 1134 is in communication with the containing groove 1133, and the connecting portion 1132 is provided with a connecting segment 1143 in the via hole 1134, the connecting segment 1143 is connected with the sealing ring 1141. In this way, the connection between the sealing ring 1141 and the connecting portion 1132 can be more stable, and the sealing ring 1141 is less likely to fall off from the connecting portion 1132.

[0084] In some embodiments, the compression ratio of the sealing ring 1141 can be greater than or equal to 8% and less than or equal to 42%, so that the sealing ring 1141 has higher sealing effect and sealing stability.

[0085] In some embodiments, the compression ratio of the sealing ring 1141 can be greater than or equal to 15% and less than or equal to 30%, so that the sealing ring 1141 has better sealing effect and longer sealing time. In some embodiments, the specific compression ratio of the sealing ring 1141 can be 18%, 20%, 23%, 26%, 29%, etc.

[0086] In some embodiments, the side of the first plate body 111 away from the second plate body can be provided with at least two clamping portions 1117, and the at least two clamping portions 1117 are arranged in the circumferential direction of the first joint 113; the at least two clamping portions 1117 are used for clamping the second joint 115 of another current collecting structure 11. In this way, the connection between the first joint 113 and the second joint 115 of another current collecting structure 11 can be more stable.

[0087] Specifically, a flange 1151 can be provided on the outer circumferential surface of the second joint 115, and the clamping portion 1117 can include an abutting portion 1118. When the first joint 113 is connected to the second joint 115 of another current collecting structure 11, the abutting portion 1118 is located on the side of the flange 1151 facing away from the first plate 111, so that at least two clamping portions 1117 are clamped with the second joint 115 of the other current collecting structure 11. By abutting the abutting portions 1118 with the flange 1151 of the second joint 115 of the other current collecting structure 11, the second joint 115 of the other current collecting structure 11 can be restricted from moving away from the corresponding first joint 113, thereby making the connection between the first joint 113 and the second joint 115 of the other current collecting structure 11 more stable. Moreover, when the abutment portion 1118 and the corresponding flange 1151 have a certain distance in the axial direction of the first through hole 1131, the relative positions of the first joint 113 and the second joint 115 of another collecting structure 11 in the axial direction of the first through hole 1131 can also be adjusted to reduce the assembly accuracy requirements.

[0088] Specifically, the flange 1151 is located at an end of the second joint 115 away from the second plate body 112 . The abutting portion 1118 is located at an end of the clamping portion 1117 away from the first plate body 111 .

[0089] Among them, such as Figure 6 As shown, in the axial direction of the first through hole 1131, the maximum distance H between the abutting portion 1118 of the current collecting structure 11 and the abutting portion 1118 of another current collecting structure 11 and the flange 1151 is less than or equal to 2 mm, so that the first joint 113 of the current collecting structure 11 and the second joint 115 of another current collecting structure 11 have a larger adjustment space in the axial direction of the first through hole 1131, so that the assembly accuracy requirement when the first joint 113 of the current collecting structure 11 and the second joint 115 of another current collecting structure 11 are connected is lower, which is beneficial to reducing the production cost of the battery pack 1 and improving the production efficiency of the battery pack 1.

[0090] Among them, in the axial direction of the first through hole 1131, the maximum distance H between the abutment portion 1118 and the flange 1151 can be 1.8mm, 1.7mm, 1.5mm, 1mm, 0.8mm, etc., which can be determined according to the structure of the temperature adjustment component 10 and is not limited here.

[0091] An embodiment of the present application also provides a temperature regulating component, which includes a current collecting structure. The specific structure of the current collecting structure refers to the above embodiment. Since this temperature regulating component adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0092] like Figure 1 and Figure 2As shown, the temperature adjusting assembly 10 comprises a temperature adjusting plate 12 and a current collecting structure 11, the temperature adjusting plate 12 is internally provided with a flow channel 121, the structure of the current collecting structure 11 can refer to the above embodiments, which will not be repeated here. Wherein, one end of the temperature adjusting plate 12 is connected with the current collector 110 of the current collecting structure 11, so that the flow channel 121 of the temperature adjusting plate 12 is in communication with the current collecting cavity 1110 of the current collector 110 of the current collecting structure 11.

[0093] The embodiments of the present application also provide a battery pack, which comprises a temperature adjusting assembly, the specific structure of the temperature adjusting assembly refers to the above embodiments, since the battery pack adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0094] Wherein, as shown in the figure, Figure 1 As shown, the battery pack 1 comprises a battery cell assembly 2 and a temperature adjusting assembly 10, the battery cell assembly 2 comprises a plurality of rows of battery cells 20, and the temperature adjusting plate 12 of the temperature adjusting assembly 10 is arranged between two adjacent rows of battery cells 20.

[0095] The above has carried on the detailed introduction to the embodiments of the present application, the principle and implementation mode of the present application are described by applying specific examples in this paper, the above embodiment is only used to help understanding the method of the present application and its core idea; At the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, according to the above, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A current collecting structure, characterized in that: include: A current collector, comprising a first plate and a second plate disposed opposite to each other, wherein the first plate and the second plate are sealed and connected to form a current collecting cavity; a first connector, provided on a side of the first plate body facing away from the second plate body, the first connector comprising a first through hole communicating with the manifold; The second joint is arranged on the side of the second plate body facing away from the first plate body, and the second joint includes a second through hole connected to the collecting cavity; the first joint is used to connect with the second joint of another collecting structure to make the second through hole connected with the first through hole of another collecting structure.

2. The current collecting structure according to claim 1, wherein: The first plate and the second plate are bonded or welded to seal the first plate and the second plate; or A sealing member is provided between the first plate body and the second plate body. The first plate body and the second plate body are connected to each other and clamp the sealing member, so that the first plate body and the second plate body are sealed and connected.

3. The current collecting structure according to claim 1, wherein: A connecting structure is provided on the side of the first plate body facing away from the second plate body, and the first joint includes a connecting portion, which is movably connected to the connecting structure; a sealing ring is provided between the first joint and the first plate body, and the sealing ring is arranged around the first through hole. The first joint and the first plate body clamp the sealing ring to form a sealing protection structure.

4. The current collecting structure according to claim 3, wherein: The first joint is movable relative to the connecting structure in the radial direction of the first through hole; and / or, The first joint can swing relative to the connecting structure in the radial direction of the first through hole; and / or, The first joint is movable relative to the connecting structure in the axial direction of the first through hole.

5. The current collecting structure according to claim 4, characterized in that: The connection structure includes a limiting member connected to the first plate body, the limiting member is located on the side of the connection part away from the first plate body, and the limiting member is used to abut against the side of the connection part away from the first plate body so that the connection part and the first plate body clamp the sealing ring.

6. The current collecting structure according to claim 5, characterized in that: The connecting structure also includes a connecting protrusion protruding from the side of the first plate body facing away from the second plate body, the connecting protrusion encloses a groove, the bottom surface of the groove is provided with an interface connected to the collecting chamber, the connecting part is at least partially accommodated in the groove, the first through hole is connected to the interface, and the limiting member is connected to the connecting protrusion.

7. The current collecting structure according to claim 6, wherein: The limiting member is welded or bonded to the connecting protrusion.

8. The current collecting structure according to claim 5, wherein: The limiting member is arranged around the four sides of the first joint; the limiting member is provided with an avoidance hole for the first joint to pass through; The first joint includes a fitting segment located in the avoidance hole, and the inner diameter of the avoidance hole is larger than the outer diameter of the fitting segment.

9. The current collecting structure according to claim 8, wherein: The outer diameter of the connecting portion is greater than the inner diameter of the avoidance hole.

10. The current collecting structure according to claim 3, wherein: The connecting portion is located at one end of the first joint close to the first plate body, and the first through hole passes through the connecting portion; the sealing ring is located between the connecting portion and the first plate body, and the connecting portion and the first plate body clamp the sealing ring.

11. The current collecting structure according to claim 10, wherein: A receiving groove is formed on one side of the connecting portion facing the first plate body. The receiving groove is arranged around the first through hole, and a portion of the sealing ring is received in the receiving groove.

12. The current collecting structure according to claim 11, wherein: The connecting portion is provided with a through hole extending along the length direction of the first through hole, the through hole is communicated with the accommodating groove, a connecting section is provided in the through hole, and the connecting section is connected to the sealing ring.

13. The current collecting structure according to any one of claims 3 to 12, characterized in that: The compression ratio of the sealing ring is greater than or equal to 8% and less than or equal to 42%.

14. The current collecting structure according to claim 13, wherein: The compression ratio of the sealing ring is greater than or equal to 15% and less than or equal to 30%.

15. The current collecting structure according to any one of claims 1 to 12, characterized in that: At least two clamping parts are protruded from one side of the first plate away from the second body. The at least two clamping parts are arranged along the circumference of the first joint. The at least two clamping parts are used to clamp with the second joint of another current collecting structure.

16. The current collecting structure according to claim 15, wherein: A flange is convexly provided on the outer peripheral surface of the second joint, and the clamping portion includes an abutting portion. When the first joint is connected to the second joint of another current collecting structure, the abutting portion is located on the side of the flange away from the first plate body, so that the at least two clamping portions are clamped with the second joint of another current collecting structure.

17. The current collecting structure according to claim 16, wherein: In the axial direction of the first through hole, a maximum distance between the abutting portion of the current collecting structure and the flange of another current collecting structure is less than or equal to 2 mm.

18. A temperature regulating assembly, characterized in that: include: A temperature regulating plate, wherein a flow channel is provided in the temperature regulating plate; A current collecting structure, wherein the current collecting structure is the current collecting structure according to any one of claims 1 to 17, and one end of the temperature regulating plate is connected to the collector of the current collecting structure so that the flow channel is connected to the collecting cavity of the collector.

19. A battery pack, characterized in that: include: A battery cell assembly, comprising multiple rows of battery cells; A temperature regulating component, wherein the temperature regulating component is the temperature regulating component according to claim 18, and the temperature regulating plate of the temperature regulating component is arranged between two adjacent rows of the battery cells.

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