Output device of battery module and battery pack

Abstract

The utility model discloses an output device of a battery module and a battery pack, and belongs to the technical field of batteries, the output device of the battery module is used for electrically connecting the battery module and a bus piece, and the output device of the battery module comprises a first connecting piece, a second connecting piece and a first insulating piece; the second connecting piece is electrically connected with the first connecting piece; the first insulating piece comprises a first body and a limiting part, the first body is provided with a first accommodating cavity, a part of the first connecting piece is arranged in the first accommodating cavity, and the second connecting piece penetrates through the first body and is connected with the first connecting piece; the limiting part is connected with the first body, the limiting part is arranged around the second connecting piece, a first limiting cavity is formed, and the limiting part is provided with a first through hole communicated with the first limiting cavity. Through the arrangement of the limiting part, the junction of the confluence piece and the second connecting piece can be surrounded, the risk of short circuit is reduced, and meanwhile, the limiting part can limit the confluence piece so as to reduce the difficulty when the confluence piece is connected with the second connecting piece.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to the output device of a battery module and a battery pack. Background Technology

[0002] The battery modules are connected to the busbar via output devices to facilitate the collection and transmission of electrical energy from multiple battery modules by the battery pack, and also to facilitate the integrated management of the system.

[0003] However, the battery module has a high voltage, and due to the lack of protection at the connection between the output device and the busbar, there is a risk of short circuit. Utility Model Content

[0004] The purpose of this utility model is to provide an output device for a battery module to solve the technical problem of short circuit risk at the connection between the output device and the busbar; another purpose of this application is to provide a battery pack.

[0005] Technical solution: This application provides an output device for a battery module, including:

[0006] First connector;

[0007] A second connector is electrically connected to the first connector.

[0008] A first insulating element, comprising:

[0009] A first body, the first body having a first receiving cavity, a portion of the first connector being disposed in the first receiving cavity, and a second connector passing through the first body and being connected to the first connector;

[0010] A limiting part is connected to the first body, the limiting part is disposed around the second connector and forms a first limiting cavity, and the limiting part has a first through hole communicating with the first limiting cavity.

[0011] In some embodiments, the limiting portion has a first surface located on the side of the limiting portion away from the first body, and the first surface has an opening communicating with the first limiting cavity;

[0012] The output device of the battery module also includes a second insulating member, which is connected to the limiting part and covers the opening.

[0013] In some embodiments, the limiting portion has a second surface away from the second connector, the second surface being located between the first surface and the first body, and connecting the first surface and the first body respectively, the second surface having a connecting groove;

[0014] The second insulating element includes:

[0015] A connecting portion is provided around the limiting portion;

[0016] A sealing portion, which is connected to the connecting portion, and the sealing portion covers the opening;

[0017] A buckle is attached to the side of the connecting portion facing the limiting portion, and the buckle is disposed in the connecting groove.

[0018] In some embodiments, the connecting portion forms a second limiting cavity around the limiting portion, and the connecting portion has a second through hole communicating with the second limiting cavity, and the first through hole communicating with the second through hole.

[0019] In some embodiments, the first through-hole extends through the first surface to communicate with the opening;

[0020] The connecting portion has a third surface facing the first body, and the second through hole penetrates the third surface.

[0021] In some embodiments, the second surface has a through groove that communicates with the first limiting cavity and extends through the first surface.

[0022] In some embodiments, the second connector has a second mounting hole facing the second insulator, the second mounting hole communicating with the first limiting cavity.

[0023] In some embodiments, the output device of the battery module further includes a plurality of third connectors, the plurality of third connectors being spaced apart, and the third connectors being connected to the side of the first body away from the limiting portion.

[0024] In some embodiments, the first insulating member further includes a second body, the second body being connected to the side of the first body near the limiting portion, the second body being spaced apart from the limiting portion, the second body having a second receiving cavity, the second receiving cavity communicating with the first receiving cavity, and a portion of the first connecting member being disposed in the second receiving cavity.

[0025] Accordingly, this application also provides a battery pack, including the output device of the battery module as described in any of the above embodiments.

[0026] Beneficial Effects: Compared with the prior art, the output device of the battery module provided in this application includes a first connector, a second connector, and a first insulating member; the second connector is electrically connected to the first connector; the first insulating member includes a first body and a limiting portion, the first body has a first receiving cavity, a portion of the first connector is disposed in the first receiving cavity, and the second connector passes through the first body and is connected to the first connector; the limiting portion is connected to the first body, surrounds the second connector, and forms a first limiting cavity, the limiting portion having a first through hole communicating with the first limiting cavity. By providing the limiting portion, this application can surround the connection point between the busbar and the second connector, reducing the risk of short circuits. Simultaneously, the limiting portion can also limit the busbar, reducing the difficulty of connecting the busbar and the second connector. Attached Figure Description

[0027] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the output device of the battery module provided in the embodiments of this application;

[0029] Figure 2 A schematic diagram of the output device of the battery module provided in the embodiment of this application, with the second insulating component removed;

[0030] Figure 3 This is a schematic diagram of the structure of the second insulating component in the output device of the battery module provided in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the output device of the battery module provided in an embodiment of this application from another angle;

[0032] Figure 5 A cross-sectional view of the output device of the battery module provided in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the structure of the first connector and the second connector in the output device of the battery module provided in the embodiments of this application;

[0034] Figure 7A cross-sectional view from another angle of the output device of the battery module provided in the embodiments of this application; reference numerals: 100, first connector; 200, second connector; 300, first insulator; 310, first body; 311, first receiving cavity; 320, second body; 321, second receiving cavity; 330, limiting part; 331, first limiting cavity; 332, first through hole; 333, first surface; 334, opening; 335, second surface; 336, connecting groove; 337, through groove; 400, second insulator; 410, connecting part; 411, second limiting cavity; 412, second through hole; 413, third surface; 420, cover part; 430, snap fastener; 510, second mounting hole; 600, third connector; 610, third mounting hole. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0037] It should also be noted that in the accompanying drawings of the embodiments of this application, the arrows labeled X, Y, and Z respectively represent the first direction X, the second direction Y, and the third direction Z. The description of this application introduces the first direction X, the second direction Y, and the third direction Z to more clearly express the relative positional relationship involved in this application. The first direction X, the second direction Y, and the third direction Z are three intersecting relative directions, not absolute directions. In practical applications, the first direction X, the second direction Y, and the third direction Z can point to any direction in space, as long as the intersection relationship between them is maintained.

[0038] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0039] The battery modules are connected to the busbar via output devices to facilitate the collection and transmission of electrical energy from multiple battery modules by the battery pack, and also to facilitate the integrated management of the system.

[0040] However, the battery module has a high voltage, and due to the lack of protection at the connection between the output device and the busbar, there is a risk of short circuit.

[0041] To address the technical problem of short-circuit risk at the connection between the output device and the busbar, the first embodiment of this application provides an output device for a battery module. (See also...) Figure 1 and Figure 5 The output device of the battery module is used to electrically connect the battery module and the busbar. The output device of the battery module includes a first connector 100, a second connector 200 and a first insulator 300. The second connector 200 is electrically connected to the first connector 100. The first insulator 300 includes a first body 310 and a limiting part 330. The first body 310 has a first receiving cavity 311. A portion of the first connector 100 is disposed in the first receiving cavity 311. The second connector 200 passes through the first body 310 and is connected to the first connector 100. The limiting part 330 is connected to the first body 310. The limiting part 330 is disposed around the second connector 200 and forms a first limiting cavity 331. The limiting part 330 has a first through hole 332 communicating with the first limiting cavity 331.

[0042] Specifically, the first insulating member 300 and the second insulating member 400 are supported by insulating material. In some embodiments, the first insulating member 300 and the second insulating member 400 are injection molded parts.

[0043] In some embodiments, the busbar passes through the first through hole 332 so that one end of the busbar can extend into the first limiting cavity 331 and be electrically connected to the second connector 200.

[0044] In some embodiments, the first insulating member 300 is used to wrap a portion of the first connector 100 to reduce the possibility of short circuit in the first connector 100 or electric shock to personnel, thereby improving the reliability and safety of the battery module.

[0045] In the above embodiment, the first limiting member formed by the limiting part 330 not only accommodates at least a portion of the second connector 200 but also accommodates the portion where the busbar connects to the second connector 200, thereby reducing the risk of short circuits at the connection between the busbar and the second connector 200 and the risk of electric shock to the operator. Furthermore, since part of the busbar is located inside the first limiting cavity 331 and the other part is located outside the first limiting cavity 331, the limiting part 330 can limit the busbar when connecting the busbar and the second connector 200, ensuring that the busbar is positioned or can only move slightly within the first limiting cavity 331. This reduces the installation difficulty of the busbar and the second connector 200, thereby improving the assembly efficiency of the battery pack.

[0046] In some embodiments, please refer to Figure 2 The limiting part 330 has a first surface 333, which is located on the side of the limiting part 330 away from the first body 310. The first surface 333 has an opening 334 that communicates with the first limiting cavity 331. The output device of the battery module also includes a second insulating member 400, which is connected to the limiting part 330 and covers the opening 334.

[0047] In some embodiments, the busbar and the second connector 200 are connected by bolts that pass through both the busbar and the second connector 200. The opening 334 on the first surface 333 provides a channel for the bolt to enter the first limiting cavity 331. The bolt can enter the first limiting cavity 331 through the opening 334. At the same time, the opening 334 on the first surface 333 also provides an operating space for tightening the bolt. The tool used to tighten the bolt can be inserted into the first limiting cavity 331 through the opening 334 to connect with the bolt and tighten the bolt.

[0048] In other embodiments, the busbar is welded to the second connector 200, and the welding tool can enter the first limiting cavity 331 through the opening 334 located on the first surface 333 to contact the busbar, thereby welding the busbar to the second connector 200.

[0049] In the above embodiment, the opening 334 on the first surface 333 facilitates the connection between the busbar and the second connector 200. When the busbar passes through the first through hole 332, the second connector 200 can be fixed to the busbar through the opening 334 on the first surface 333, reducing the installation difficulty of the busbar. At the same time, the second insulating member 400 covering the opening 334 reduces the possibility of short circuit or electric shock caused by exposure of the connection between the second connector 200 and the busbar, improving the reliability and safety of the battery module.

[0050] In some embodiments, please refer to Figure 2 and Figure 3The limiting part 330 has a second surface 335 away from the second connector 200. The second surface 335 is located between the first surface 333 and the first body 310 and connects the first surface 333 and the first body 310 respectively. The second surface 335 has a connecting groove 336. The second insulating member 400 includes a connecting part 410, a cover part 420 and a buckle 430. The connecting part 410 is disposed around the limiting part 330. The cover part 420 is connected to the connecting part 410 and covers the opening 334. The buckle 430 is connected to the side of the connecting part 410 facing the limiting part 330 and is disposed in the connecting groove 336.

[0051] It is understandable that the second surface 335 is the outer surface of the limiting part 330 that is away from the second connector 200.

[0052] In some embodiments, the latch 430 has a limiting surface and a guide surface that are interconnected. The latching interface is located on the side of the latch 430 near the cover portion 420. The limiting surface is connected to the connecting portion 410 and is spaced apart from the cover portion 420. The limiting surface can abut against the portion of the connecting groove 336 near the first surface 333 to limit the second insulating member 400. The guide surface is located on the side of the latching portion away from the cover portion 420 and is used to guide the latching portion into the connecting groove 336. In some embodiments, the limiting surface is perpendicular to the surface of the connecting portion 410 to which the latch 430 is connected, and the included angle between the limiting surface and the guide surface is an acute angle.

[0053] In other embodiments, the guide surface can also compress the limiting portion 330 so that the limiting portion 330 elastically deforms toward the second connector 200 so that the latch 430 can enter the connecting groove 336.

[0054] In some embodiments, there are multiple latches 430, and the multiple latches 430 are arranged at circumferential intervals along the connecting portion 410.

[0055] In some embodiments, at least two latches 430 are disposed opposite to each other, that is, at least two latches 430 can be located on both sides of the limiting portion 330.

[0056] In the above embodiment, by providing a second insulating member 400 that can be fastened to the limiting part 330, the connection difficulty between the second insulating member 400 and the limiting part 330 is reduced, thereby reducing the assembly difficulty of the battery module and improving the assembly efficiency of the battery module.

[0057] In some embodiments, please refer to Figure 1 and Figure 3 The connecting portion 410 surrounds the limiting portion 330 to form a second limiting cavity 411. The connecting portion 410 has a second through hole 412 that communicates with the second limiting cavity 411. The first through hole 332 communicates with the second through hole 412.

[0058] In the above embodiment, the connecting portion 410 surrounding the limiting portion 330 can connect more clips 430, making the connection between the second insulating member 400 and the limiting portion 330 more secure. Simultaneously, surrounding the limiting portion 330 allows the connecting portion 410 to form a box-shaped structure with connected ends, resulting in better mechanical properties. The limiting portion 330 is less prone to deformation that could cause the clips 430 to detach from the connecting groove 336, thus improving the reliability of the connection between the second insulating member 400 and the limiting portion 330.

[0059] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 3 The first through hole 332 penetrates the first surface 333 to communicate with the opening 334; the connecting part 410 has a third surface 413 facing the first body 310, and the second through hole 412 penetrates the third surface 413.

[0060] In the above embodiments, it is understood that the first through hole 332 is used to pass through the busbar, and the first through hole 332 communicating with the opening 334 allows a portion of the busbar to be inserted into the first limiting cavity 331 through the opening 334 and pass through the first through hole 332, reducing the difficulty of connecting the busbar and the second connector 200. At the same time, after the second through hole 412 for passing through the busbar penetrates the third surface 413, the step of connecting the second insulating member 400 and the limiting member can be placed after the busbar and the second connector 200 are connected. That is, during the installation process, the busbar and the second connector 200 are first connected in the first limiting cavity 331, and then the second insulating member 400 and the limiting part 330 are connected to cover the opening 334, and the busbar passes through the second through hole 412.

[0061] In some embodiments, please refer to Figure 2 The second surface 335 has a through groove 337, which is connected to the first limiting cavity 331 and penetrates the first surface 333.

[0062] In some embodiments, the second surface 335 has a plurality of through slots 337, which are spaced apart circumferentially along the limiting portion 330.

[0063] In the above embodiment, by providing a through groove 337 to weaken the mechanical properties of the limiting part 330, a mechanically weak part is created in the limiting part 330 so that when the buckle 430 contacts the second surface 335, the limiting part 330 can more easily undergo elastic deformation towards the second connector 200, thereby making it easier for the buckle 430 to enter the connecting groove 336 to complete the connection between the second insulating member 400 and the limiting part 330, reducing the difficulty of connecting the second insulating member 400 and the limiting part 330.

[0064] In some embodiments, please refer to Figure 2 The second connector 200 has a second mounting hole 510 facing the second insulator 400, and the second mounting hole 510 communicates with the first limiting cavity 331.

[0065] In some embodiments, the busbar is connected to the second connector 200, and bolts are inserted into both the busbar and the second mounting hole 510, allowing the busbar to abut against the second connector 200.

[0066] In the above embodiments, the busbar can be bolted to the second connector 200, which improves the connection reliability between the busbar and the second connector 200 and reduces the possibility of poor contact between the busbar and the second connector 200.

[0067] In some embodiments, please refer to Figure 1 and Figure 2 The output device of the battery module also includes a plurality of third connectors 600, which are spaced apart and connected to the side of the first body 310 away from the limiting part 330.

[0068] It is understood that in some embodiments, the battery module includes an end plate.

[0069] In the above embodiment, by providing a third connector 600 so that the output device of the battery module is inserted into the end plate, the end plate can limit the output device of the battery module. Simultaneously, by providing multiple third connectors 600, and ensuring that all three third connectors 600 are inserted into the end plate, rotation of the battery module's output device relative to the end plate can be prevented.

[0070] In some embodiments, please refer to Figure 4 The third connector 600 has a third mounting hole 610 on the side opposite to the first body 310. The positioning post inside the end plate can be inserted into the third mounting hole 610 to limit the output device of the battery module, thereby enabling the output device of the battery module to be better positioned and installed more stably.

[0071] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 4 and Figure 7 The first insulating member 300 also includes a second body 320, which is connected to the side of the first body 310 near the limiting part 330. The second body 320 and the limiting part 330 are spaced apart. The second body 320 has a second receiving cavity 321, which is connected to the first receiving cavity 311. A portion of the first connecting member 100 is disposed in the second receiving cavity 321.

[0072] Specifically, the connection portion 410 between the second body 320 and the second insulating member 400 is spaced apart.

[0073] The battery module includes a battery pack, an end plate located on one side of the battery pack, a first body 310 connected to the end plate and located on the side of the battery pack closer to the end plate, and the battery pack having a connection surface facing the end plate.

[0074] In some embodiments, along the direction from the first body 310 to the battery pack, the second body 320 is spaced apart from the orthographic projection of the connecting surface and the orthographic projection of the limiting portion 330 on the reference surface, so that the busbar can avoid other components after being connected to the second connector 200, which facilitates the assembly of the battery pack.

[0075] In the above embodiments, by providing a second body 320 to further insulate and wrap the first connector 100, the possibility of short circuit in the output device of the battery module or electric shock to personnel is reduced, thereby improving the reliability and safety of the battery module.

[0076] In some embodiments, the first connector 100 has a cross-section perpendicular to the extending direction, and the cross-section has a minimum area S, satisfying:

[0077]

[0078] Among them, K t W / (mm 2 ·K) is the heat dissipation coefficient of the first connector 100, which can be determined based on the material of the first connector 100;

[0079] t K is the preset temperature rise of the first connector 100, which is manually set;

[0080] M mm is the perimeter of the cross section. The perimeter of the cross section is determined by wrapping a line around the cross section and measuring the length of the line around the cross section.

[0081] L mm is the length of the first connector 100 along the extension direction. The length of the first connector 100 in the extension direction is determined by measuring the first connector 100 along the extension direction using a vernier caliper.

[0082] ρ0J / (g·K) is the specific heat capacity of the first connector 100, which can be determined based on the material of the first connector 100;

[0083] IA is the preset current of the first connector 100, which is manually set;

[0084] α is the temperature coefficient of resistance of the first connector 100, which can be determined based on the material of the first connector 100;

[0085] θK is the initial temperature of the first connector 100;

[0086] ρg / mm 3 The density of the first connector 100 can be determined based on the material of the first connector 100;

[0087] Th is the duration of the current, T = Q / I, where QAh is the charge of the battery module.

[0088] In some embodiments, please refer to Figure 6 The first connector 100 includes:

[0089] The first part 110 is disposed in the first receiving cavity 311 along the first direction X. The first part 110 extends along the first direction X and has a first cross-section perpendicular to the first direction X. The first cross-section has a minimum area S1, satisfying:

[0090]

[0091] Among them, K t1 W / (mm 2 ·K) is the heat dissipation coefficient of the first part 110, which can be determined based on the material of the first part 110;

[0092] t1 K is the first preset temperature rise of the first unit 110, which is manually set;

[0093] M1 mm is the perimeter of the first cross section. A line is used to wrap around the first cross section, and the length of the line around the first cross section is measured to determine the perimeter of the first cross section.

[0094] L1 mm is the length of the first part 110 along the first direction X. The length of the first part 110 is measured along the first direction X using a vernier caliper to determine the length of the first part 110 in the extension direction.

[0095] ρ 01 J / (g·K) is the specific heat capacity of the first part 110, which can be determined based on the material of the first part 110;

[0096] I1 A is the first preset current of the first unit 110, which is manually set;

[0097] α1 is the temperature coefficient of resistance of the first part 110, which can be determined based on the material of the first part 110;

[0098] θ1K is the first initial temperature of the first part 110;

[0099] ρ1g / mm 3 The density of the first part 110 can be determined based on the material of the first part 110;

[0100] T1h is the duration of the current, T1=Q / I1, where QAh is the charge of the battery module.

[0101] The third part 130 is connected to the first part 110 along the third direction Z and to one side of the second connector 200. The third part 130 extends along the third direction Z and has a third cross section perpendicular to the third direction Z. The third cross section has a minimum area S3, satisfying:

[0102]

[0103] Among them, K t3 W / (mm 2 ·K) is the heat dissipation coefficient of the third part 130, which can be determined based on the material of the third part 130;

[0104] △t3 K is the third preset temperature rise of the third part 130, which is manually set;

[0105] M3 mm is the perimeter of the third section. A line is used to wrap around the third section, and the length of the line around the third section is measured to determine the perimeter of the third section.

[0106] L3 mm is the length of the third part 130 along the third direction Z. The length of the third part 130 is measured along the third direction Z using vernier calipers to determine the length of the third part 130 in the extension direction.

[0107] ρ 03 J / (g·K) is the specific heat capacity of Part 3 130, which can be determined based on the material of Part 3 130;

[0108] I3 A is the third preset current of the third part 130, which is manually set;

[0109] α3 is the temperature coefficient of resistance of the third part 130, which can be determined based on the material of the third part 130;

[0110] θ3K is the third initial temperature of the third part, 130.

[0111] ρ3g / mm 3 The density of Part 330 can be determined based on the material of Part 330.

[0112] T3h is the duration of the current, T3=Q / I3, where QAh is the charge of the battery module.

[0113] The second part 120 is connected to the end of the third part 130 away from the first part 110. The second part 120 extends along the second direction Y and has a second cross section perpendicular to the second direction Z. The second cross section has a minimum area S2, satisfying:

[0114]

[0115] Among them, K t2 W / (mm 2 ·K) is the heat dissipation coefficient of the second part 120, which can be determined based on the material of the second part 120;

[0116] △t2 K is the second preset temperature rise of the second part of 120, which is manually set;

[0117] M2 mm is the perimeter of the second section. A line is used to wrap around the second section, and the length of the line around the second section is measured to determine the perimeter of the second section.

[0118] L2 mm is the length of the second part 120 along the second direction Y. The length of the second part 120 is measured along the second direction Y using vernier calipers to determine the length of the second part 120 in the extension direction.

[0119] ρ 02 J / (g·K) is the specific heat capacity of Part 2 120, which can be determined based on the material of Part 2 120;

[0120] I2 A is the second preset current of the second part 120, which is manually set;

[0121] α2 is the temperature coefficient of resistance of the second part 120, which can be determined based on the material of the second part 120;

[0122] θ2K is the second initial temperature of the second part, 120.

[0123] ρ2g / mm 3 The density of Part 120 can be determined based on the material of Part 120.

[0124] T2h is the current duration, T2 = Q / I2, where QAh is the charge of the battery module. Accordingly, this application also provides a battery pack, including the output device of the battery module as described in any of the above embodiments.

[0125] The output device and battery pack of a battery module provided in the embodiments of this application have been described in detail above. Specific examples have been used in this application to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An output device of a battery module, characterized by, An output device of a battery module for electrically connecting the battery module and a busbar, the output device comprising: a first connecting member; a second connecting member electrically connected to the first connecting member; a first insulating member comprising: a first body having a first accommodating cavity in which a portion of the first connecting member is disposed, the second connecting member penetrating the first body and being connected to the first connecting member; a limiting portion connected to the first body, the limiting portion being disposed around the second connecting member and forming a first limiting cavity, the limiting portion having a first through hole in communication with the first limiting cavity.

2. The output device of the battery module according to claim 1, wherein The limiting portion has a first surface located on a side of the limiting portion away from the first body, the first surface having an opening in communication with the first limiting cavity. The output device of the battery module further comprises a second insulating member connected to the limiting portion and covering the opening.

3. The output device of the battery module according to claim 2, wherein: the limiting portion has a second surface located between the first surface and the first body and connected to the first surface and the first body respectively, the second surface having a connecting groove; the second insulating member comprises: a connecting portion disposed around the limiting portion; a covering portion connected to the connecting portion, the covering portion covering the opening; a buckle connected to a side of the connecting portion facing the limiting portion, the buckle being disposed in the connecting groove.

4. The output device of the battery module according to claim 3, wherein The connecting portion forms a second limiting cavity around the limiting portion, the connecting portion having a second through hole in communication with the second limiting cavity, the first through hole being in communication with the second through hole.

5. The output device of the battery module according to claim 4, wherein: the first through hole penetrates the first surface to communicate with the opening; the connecting portion has a third surface facing the first body, the second through hole penetrating the third surface.

6. The output device of the battery module according to claim 3, wherein The second surface has a through groove in communication with the first limiting cavity, the through groove penetrating the first surface.

7. The output device of the battery module according to claim 2, wherein: the second connecting member has a second mounting hole facing the second insulating member, the second mounting hole being in communication with the first limiting cavity.

8. The output device of a battery module according to claim 1, wherein The output device of the battery module further comprises a plurality of third connecting members, the plurality of third connecting members being spaced apart and connected to a side of the first body away from the limiting portion.

9. The output device of a battery module according to claim 1, wherein The first insulating member further comprises a second body connected to a side of the first body close to the limiting portion, the second body being spaced apart from the limiting portion, the second body having a second accommodating cavity in communication with the first accommodating cavity, a portion of the first connecting member being disposed in the second accommodating cavity.

10. A battery pack, characterized by, An output device of a battery module comprising any one of the output devices of the battery module according to claims 1-9.

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