Electric connection assembly, battery pack and electric equipment

Abstract

The utility model discloses an electric connection assembly, a battery pack and electric equipment, the electric connection assembly comprises a fusing part and an arc extinguishing material piece, the fusing part is configured to be fused under a predetermined condition; and the arc extinguishing material piece covers the fusing part. Therefore, the fusing part is used for fusing to cut off the circuit under the conditions of overload or short circuit and the like, so that a protection effect is achieved. The layout of the arc extinguishing material piece can ensure that the arc extinguishing material piece can play a role immediately when arc discharge is generated by fusing, absorb or disperse the arc, and prevent the arc diffusion from damaging the battery cell or the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an electrical connection component, a battery pack, and an electrical device. Background Technology

[0002] In the prior art, the battery pack is provided with an electrical connection structure that connects adjacent cells or an electrical connection structure that connects adjacent cell groups. The electrical connection structure is set as a fusible connection structure. When the electrical connection structure melts, the instantaneous high voltage will generate a high voltage arc, which poses a serious safety hazard. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first objective of the present invention is to provide an electrical connection component that can improve the safety and reliability of the electrical connection component.

[0004] The second objective of this invention is to provide a battery pack comprising multiple battery cells or battery cell groups and the electrical connection components described in the above embodiments.

[0005] The third objective of this invention is to provide an electrical device that includes the electrical connection components or battery pack described in the above embodiments.

[0006] An electrical connection assembly according to a first aspect of the present invention includes: a fusible portion and an arc-extinguishing material, the fusible portion being configured to melt under predetermined conditions; the arc-extinguishing material covering the fusible portion.

[0007] According to the electrical connection assembly of the first aspect of this utility model, the fusible part is used to melt and cut off the circuit in the event of overload or short circuit, thereby providing protection. The layout of the arc-extinguishing material ensures that it can immediately function when arcing occurs during melting, absorbing or dispersing the arc and preventing the arc from spreading and damaging the battery cell or battery pack.

[0008] In some embodiments, the device includes: a first connector and a second connector, the first connector including a first connecting portion; the second connector including a second connecting portion, the first connecting portion and the second connecting portion being connected to each other; the first connecting portion and the second connecting portion respectively including a contact portion and a sub-fuse portion, the sub-fuse portions of the first connecting portion and the sub-fuse portions of the second connecting portion being opposite to and connected to form the fuse portion, the contact portions of the first connecting portion and the contact portions of the second connecting portion being opposite to and connected to each other, and the cross-sectional area of ​​the sub-fuse portion being smaller than the cross-sectional area of ​​the contact portion.

[0009] In some embodiments, the width of the sub-fuse portion is smaller than the width of the contact portion.

[0010] In some embodiments, the arc-extinguishing material component includes a first sub-material component and a second sub-material component, wherein the first sub-material component is disposed on the side of the first connecting portion opposite to the second connecting portion, and the second sub-material component is disposed on the side of the second connecting portion opposite to the first connecting portion.

[0011] In some embodiments, an encapsulation assembly is also included, wherein the fusible portion and the arc-extinguishing material are disposed within the encapsulation assembly.

[0012] In some embodiments, the encapsulation assembly includes a housing and a cover plate connected to define a receiving cavity, wherein the fusible portion and the arc-quenching material are disposed within the receiving cavity.

[0013] In some embodiments, the housing and / or the cover plate are high-temperature resistant insulating components.

[0014] In some embodiments, the first connector further includes a third connecting portion, one end of which is connected to one end of the first connecting portion, and the other end of which extends to the outside of the encapsulation component.

[0015] In some embodiments, the package further includes: a thermally conductive element disposed on one side of the third connection portion adjacent to the encapsulation assembly; and / or, the thermally conductive element disposed on the other side of the third connection portion away from the encapsulation assembly.

[0016] In some embodiments, the second connector further includes a fourth connecting portion, one end of which is connected to the second connecting portion; the first connector further includes a fifth connecting portion, one end of which is connected to the first connecting portion; the other end of the fourth connecting portion and the other end of the fifth connecting portion are respectively adapted to connect different battery cells or battery cell groups.

[0017] In some embodiments, the arc-extinguishing material is a quartz sand material.

[0018] In some embodiments, the electrical connection assembly is an aluminum component.

[0019] A battery pack according to a second aspect of the present invention includes: a plurality of battery cells or battery cell groups and an electrical connection component, wherein the electrical connection component is the same as the electrical connection component according to the first aspect of the present invention described above, and the electrical connection component connects two adjacent battery cells or connects two adjacent battery cell groups.

[0020] In some embodiments, the battery pack includes: a heat exchange plate, the battery cell or the battery cell assembly disposed on the heat exchange plate, and a third connection portion of the electrical connection assembly in contact with the heat exchange plate.

[0021] The electrical equipment according to a third aspect embodiment of the present invention includes an electrical connection component according to the first aspect embodiment of the present invention, or a battery pack according to the second aspect embodiment of the present invention.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of an electrical connection assembly according to an embodiment of the present utility model;

[0025] Figure 2 This is an exploded view of the electrical connection assembly according to an embodiment of the present utility model;

[0026] Figure 3 This is an assembly diagram of the first connector, the second connector, and the arc-extinguishing material according to an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the first and second connectors according to an embodiment of the present utility model;

[0028] Figure 5 This is a top view of the first and second connectors according to an embodiment of the present utility model;

[0029] Figure 6 This is an assembly diagram of the battery cell and electrical connection assembly according to an embodiment of the present utility model.

[0030] Figure label:

[0031] 100. Electrical connection components;

[0032] 10. First connector; 11. First connecting part; 12. Third connecting part; 13. Fifth connecting part; 14. Sixth connecting part; 15. Heat-conducting component; 16. Fusible part; 161. Sub-fusible part; 17. Contact part;

[0033] 20. Second connecting member; 21. Second connecting part; 22. Fourth connecting part;

[0034] 30. Encapsulation component; 31. Arc-extinguishing material component; 32. First sub-material component; 33. Second sub-material component; 34. Housing; 35. Cover plate; 36. Receiving cavity;

[0035] 40. Battery cells;

[0036] 50. Heat exchange plate;

[0037] A. First direction; B. Second direction; C. Third direction. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-6 The electrical connection assembly 100 according to an embodiment of the present invention includes a fusible portion 16 and an arc-extinguishing material 31. The electrical connection assembly 100 has a first direction A, a second direction B, and a third direction C, which are orthogonal to each other.

[0039] Specifically, such as Figures 1-6 As shown, the fusible part 16 is configured to melt under predetermined conditions; the arc-extinguishing material 31 covers the fusible part 16.

[0040] Combination Figures 1-5 The fuse 16 is used to melt and cut off the circuit under overload or other conditions, thus providing protection. The layout of the arc-extinguishing material 31 ensures that it can immediately function when arcing occurs due to melting, absorbing or dispersing the arc and preventing the arc from spreading and damaging the cell 40 or battery pack.

[0041] According to the first aspect of the present invention, the electrical connection assembly 100 is applicable between battery cells 40 or between battery cell groups. The fuse part 16 is used to cut off the circuit by local heating and melting in the event of overload or short circuit, thereby playing a protective role. The arc extinguishing material 31 is used to prevent the arc from continuing to exist between the connection parts, thereby avoiding the risk of arcing caused by voltage breakdown of air at the moment of melting, improving the safety and reliability of the electrical connection assembly 100, and thus improving the safety and reliability of the battery cells 40 and the battery pack.

[0042] According to some embodiments of this utility model, such as Figures 1-5 As shown, it includes: a first connector 10 and a second connector 20. The first connector 10 includes a first connecting portion 11; the second connector 20 includes a second connecting portion 21. The first connecting portion 11 and the second connecting portion 21 are connected to each other. The first connecting portion 11 and the second connecting portion 21 respectively include a contact portion 17 and a sub-fuse portion 161. The sub-fuse portion 161 of the first connecting portion 11 and the sub-fuse portion 161 of the second connecting portion 21 are opposite to each other and connected to form a fuse portion 16. The contact portion 17 of the first connecting portion 11 and the contact portion 17 of the second connecting portion 21 are opposite to each other and connected to each other. The cross-sectional area of ​​the sub-fuse portion 161 is smaller than the cross-sectional area of ​​the contact portion 17.

[0043] The first connector 10 extends along the second direction B of the electrical connection assembly 100, and the first connecting portion 11 is disposed perpendicular to the first direction A and parallel to the second direction B and the third direction C. The second connecting portion 21 extends along the second direction B of the electrical connection assembly 100, and the second connecting portion 21 is disposed perpendicular to the first direction A and parallel to the second direction B and the third direction C. The first connecting portion 11 and the second connecting portion 21 are connected to each other on one side surface along the first direction A.

[0044] The sub-fuse portion 161 of the first connecting portion 11 is opposite to the sub-fuse portion 161 of the second connecting portion 21 along the first direction A, and the contact portion 17 of the first connecting portion 11 is opposite to the contact portion 17 of the second connecting portion 21 along the first direction A. The width of the sub-fuse portion 161 in the third direction C is less than or equal to the width of the contact portion 17 in the third direction C. The contact portion 17 is mainly used for electrical connection, ensuring that current can be smoothly transmitted from the first connecting member 10 to the second connecting member 20. The relative position between the contact portions 17 ensures the stability of the electrical connection, allowing current to flow smoothly between the two parts. The width of the sub-fuse portion 161 is less than or equal to the width of the contact portion 17, which means that under normal operating conditions, current is mainly transmitted through the contact portion 17; while under abnormal conditions, the sub-fuse portion 161 will become a weak link due to excessive current, breaking first and thus protecting the entire circuit.

[0045] Therefore, the arrangement of the first connecting portion 11 and the second connecting portion 21 can improve the stability of the connection between the first connecting member 10 and the second connecting member 20. The sub-fuse portion 161 of the first connecting portion 11 and the sub-fuse portion 161 of the second connecting portion 21 are arranged opposite to each other, ensuring that when fusing is required, the two sub-fuse portions 161 can fuse synchronously, making the disconnection process more uniform and controllable. This can increase the circuit protection function without sacrificing the current transmission efficiency under normal operating conditions. Similarly, the relative position between the contact portions 17 can also ensure good contact during current transmission. The cross-sectional area of ​​the sub-fuse portion 161 is smaller than that of the contact portion 17, meaning that under the same current density, the sub-fuse portion 161 is more likely to reach its melting point and disconnect, thereby cutting off the current flow and protecting the circuit.

[0046] According to some embodiments of this utility model, such as Figures 1-3 As shown, the width of the fuse portion 16 is smaller than the width of the contact portion 17. Because the width of the fuse portion 16 is smaller than the width of the contact portion 17, when the current exceeds a predetermined value, the fuse portion 16 will melt first, cutting off the power supply and acting as a safety device to prevent greater damage.

[0047] According to some embodiments of this utility model, such as Figures 1-3As shown, the arc-extinguishing material component 31 includes a first sub-material component 32 and a second sub-material component 33. The first sub-material component 32 is disposed on the side of the first connecting portion 11 away from the second connecting portion 21, and the second sub-material component 33 is disposed on the side of the second connecting portion 21 away from the first connecting portion 11. That is, the first sub-material component 32 is disposed on the side of the first connecting portion 11 away from the second connecting portion 21 along the first direction A, and the second sub-material component is disposed on the side of the second connecting portion 21 away from the first connecting portion 11 along the first direction A.

[0048] Therefore, when the fuse 16 melts due to overcurrent, an electric arc may be generated. The arc-extinguishing material components 31 respectively provided on both sides of the connection can absorb the energy of the electric arc more quickly, help extinguish the electric arc, reduce the impact of the electric arc on the surrounding environment and other components, and improve the reliability and safety of the entire electrical connection assembly 100.

[0049] According to some embodiments of this utility model, such as Figures 1-3 As shown, it also includes an encapsulation assembly 30, a fusible part 16, and an arc-extinguishing material 31 disposed within the encapsulation assembly 30. A first connecting part 11 and a second connecting part 21 are disposed within the encapsulation assembly, and the arc-extinguishing material is disposed between the outer peripheral side of the first connecting part 11 and the second connecting part 21 and the inner peripheral wall of the encapsulation assembly.

[0050] Therefore, by combining the use of the encapsulation component and the arc-extinguishing material 31, the generation of electric arc can be further reduced during the melting process, the electrical connection component 100 can be protected from damage, and the safety of the entire system can be improved.

[0051] According to some embodiments of this utility model, such as Figures 1-3 As shown, the encapsulation assembly includes a housing 34 and a cover plate 35, which are connected to define a receiving cavity 36. A fusible part 16 and an arc-extinguishing material 31 are disposed within the receiving cavity 36.

[0052] The first connecting portion 11 and the second connecting portion 21 are respectively located within the housing 34, and the arc-extinguishing material component 31 is disposed between the side wall of the housing 34 and the first connecting portion 11 and the second connecting portion 21. The housing 34 is a major component of the entire encapsulation assembly 30, used to enclose and protect the internal connecting components. The arc-extinguishing material component 31 includes a first sub-material component 32 and a second sub-material component 33. The first sub-material component 32 is disposed on the side of the first connecting portion 11 away from the second connecting portion 21 along the first direction A, and is disposed between the first connecting portion 11 and the inner wall of the housing 34 adjacent to the first connecting portion 11 along the first direction A. The second sub-material component 33 is disposed on the side of the second connecting portion 21 away from the first connecting portion 11 along the first direction A, and is disposed between the second connecting portion 21 and the inner wall of the housing 34 adjacent to the second connecting portion 21 along the first direction A. In some embodiments, the arc-extinguishing material component 31 covers the first connecting portion 11 and the second connecting portion 21. The housing 34 is open on one side along the first direction A to form an opening, and the cover plate 35 is adapted to fit into the opening to form a receiving cavity 36. The first connecting part 11 and the second connecting part 21 and other components are adapted to be assembled into the receiving cavity 36 through the opening.

[0053] Therefore, the encapsulation component 30 is adapted to provide physical protection for the electrical connection component 100, the housing 34 is adapted to provide physical protection for the first connector 10 and the second connector 20, the cover plate 35 is provided to facilitate the assembly of the electrical connection component 100, the encapsulation component 30 can prevent the external environment from affecting the internal connection, and the layout of the arc extinguishing material component 31 can ensure that it can play a role immediately when an electric arc is generated between the connectors, absorb or disperse the electric arc, and prevent the electric arc from spreading and causing damage to the electrical connection component 100.

[0054] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, housing 34 and / or cover plate 35 are high-temperature resistant insulating components.

[0055] The housing 34 and / or cover 35 are made of high-temperature resistant materials, which enable them to maintain their mechanical strength and insulation properties at high temperatures, providing reliability for the electrical connection components under high-temperature operating conditions. The insulation properties of the housing 34 and / or cover 35 effectively prevent electrical short circuits and other faults caused by conductivity.

[0056] Therefore, by using the high-temperature resistant insulating housing 34, the electrical connection assembly 100 can operate reliably in complex environments, and the safety and service life of the overall system can also be improved.

[0057] According to some embodiments of this utility model, such as Figure 3 and Figure 4As shown, the first connector 10 further includes: one end of the third connector 12 is connected to one end of the first connector 11, and the other end of the third connector 12 extends to the outside of the encapsulation assembly 30.

[0058] The third connecting portion 12 extends along the second direction B of the electrical connection assembly 100. The third connecting portion 12 is perpendicular to the first direction A, parallel to the second direction B and the third direction C, and is parallel to the first connecting portion 11. The third connecting portion 12 and the first connecting portion 11 are opposite each other along the first direction A, and there is a certain distance between the third connecting portion 12 and the first connecting portion 11. The third connecting portion 12 is located along the first direction A on the side of the first connecting portion 11 away from the second connecting portion 21. The third connecting portion 12 and the first connecting portion 11 are connected by a sixth connecting portion 14. The sixth connecting portion 14 extends along the first direction A. One end of the sixth connecting portion 14 along the first direction A is connected to one end of the first connecting portion 11 along the second direction B, and the other end of the sixth connecting portion 14 along the first direction A is connected to one end of the third connecting portion 12 along the second direction B. The other end of the third connecting portion 12 along the second direction B and the other end of the first connecting portion 11 along the second direction B are spaced apart from each other in the first direction A. The third connecting part 12 is located outside the encapsulation assembly 30, and the third connecting part 12 is located at the bottom of the housing 34 along the first direction A.

[0059] Thus, the first connecting part 11 and the third connecting part 12 are connected by the sixth connecting part 14 to form a stable structure, which can enhance the overall mechanical strength of the connector and improve its bending resistance and stability. The third connecting part 12 is located outside the encapsulation assembly 30, especially at the bottom of the housing 34, which helps to dissipate heat, reduce internal heat accumulation, and improve thermal management performance.

[0060] According to some embodiments of this utility model, such as Figures 2-4 As shown, it also includes: a heat-conducting element 15, which is disposed on the side of the third connecting portion 12 adjacent to the encapsulation assembly 30, that is, the heat-conducting element 15 is disposed between the third connecting portion 12 along the first direction A and the bottom surface of the housing 34 of the encapsulation assembly 30 along the first direction A; or, the heat-conducting element 15 is disposed on the other side of the third connecting portion 12 away from the encapsulation assembly 30, that is, the heat-conducting element 15 is disposed on the other side of the third connecting portion 12 along the first direction A away from the encapsulation assembly 30; or, the third connecting portion 12 is provided with heat-conducting elements 15 on both the side adjacent to the encapsulation assembly 30 and the other side away from the encapsulation assembly 30, that is, the third connecting portion 12 is provided with heat-conducting elements 15 on both sides along the first direction A.

[0061] Therefore, the main purpose of the heat-conducting element 15 is to accelerate heat conduction, help the third connection portion 12 dissipate heat better, and thus reduce the operating temperature of the entire connection assembly. By providing the heat-conducting element 15 on the side of the third connection portion 12 adjacent to the encapsulation assembly 30 or on the side away from the encapsulation assembly 30, the thermal management performance of the electrical connection assembly 100 can be significantly improved, the heat dissipation efficiency of the electrical connection assembly 100 can be improved, and through efficient thermal management, the thermal stress caused by excessive temperature rise of the connection can be reduced, the service life can be extended, and the risk of failure can be reduced.

[0062] According to some embodiments of this utility model, such as Figures 2-4 As shown, the second connector 20 further includes a fourth connector 22, one end of which is connected to the second connector 21; the first connector 10 further includes a fifth connector 13, one end of which is connected to the first connector 11; the other ends of the fourth connector 22 and the fifth connector 13 are respectively adapted to connect different cells 40 or cell groups.

[0063] One end of the fourth connecting portion 22 along the first direction A is adapted to connect with the second connecting portion 21, and the other end of the fourth connecting portion 22 along the first direction A extends in a direction away from the second connecting portion 21. The other end of the fourth connecting portion 22 is adapted to connect with a battery cell 40. One end of the fifth connecting portion 13 along the first direction A is adapted to connect with the first connecting portion 11, and the other end of the fifth connecting portion 13 extends in a direction away from the first connecting portion 11. The other end of the fifth connecting portion 13 is adapted to connect with another battery cell 40.

[0064] Therefore, by setting the fourth and fifth connectors, the electrical connection assembly 100 can connect multiple cells 40 or cell groups. Each cell 40 or cell group can be connected through an independent connector, making it more convenient to maintain or replace the cell 40 without rewiring or disassembling the entire connection assembly. The electrical connection assembly 100 not only expands the connection capability but also improves the reliability, flexibility and maintainability of the system.

[0065] According to some embodiments of this utility model, such as Figure 2 As shown, the arc-extinguishing material component 31 is a quartz sand material component.

[0066] Quartz sand materials possess excellent electrical insulation properties, rapidly absorbing the energy of an electric arc and preventing its continuation, thus protecting the connectors from arc damage. Quartz sand quickly cools the arc area, further preventing arc propagation and ensuring rapid interruption of the current path in the event of melting or disconnection. Quartz sand maintains the stability of its physical and chemical properties at high temperatures, without losing its insulating properties. The high insulation performance of quartz sand effectively prevents current leakage, protecting the electrical connection components from external environmental influences.

[0067] Therefore, by using quartz sand as the arc-extinguishing material, the electrical connection assembly 100 can not only efficiently extinguish the arc and improve the reliability and safety of the system, but also optimize thermal management and mechanical strength.

[0068] According to some embodiments of this utility model, such as Figure 2 As shown, the electrical connection assembly 100 is made of aluminum.

[0069] Aluminum is lightweight, which can reduce the weight of the entire component. Aluminum has good electrical conductivity, which can effectively carry current. Aluminum also has good thermal conductivity, which helps to dissipate heat.

[0070] Therefore, by using aluminum as the electrical connection component 100, the electrical connection component 100 can achieve lightweight and high conductivity, while also improving system reliability and heat dissipation efficiency. The good flexibility of aluminum allows it to absorb certain assembly tolerances, reducing the machining precision required for the electrical connection component 100.

[0071] According to the battery pack of the second aspect embodiment of the present utility model, combined with Figure 6 It includes: a plurality of battery cells 40 or battery cell groups and an electrical connection component 100, wherein the electrical connection component 100 is the electrical connection component 100 according to the first aspect embodiment of the present invention described above, and the electrical connection component 100 connects two adjacent battery cells 40 or connects two adjacent battery cell groups.

[0072] According to the battery pack of this utility model embodiment, each electrical connection component 100 connects two adjacent cells 40 or two cell assemblies to ensure electrical connection between cells 40 or cell assemblies. By applying the electrical connection component 100 in the above embodiment, the electrical connection between cells 40 can be made more stable, effectively preventing the generation of electric arc, improving the reliability of the connection, reducing the temperature accumulation at the connection point, thereby improving the overall thermal management performance of the battery pack and enhancing the overall safety of the battery pack.

[0073] According to some embodiments of this utility model, such as Figure 6 As shown, the battery pack includes: a heat exchange plate 50, a plurality of battery cells 40 or battery cell groups disposed on the heat exchange plate 50, and the third connection portion 12 of the electrical connection assembly 100 in contact with the heat exchange plate 50.

[0074] The heat exchange plate 50 serves as a support platform for the battery cell 40 and also plays an important role in heat dissipation. The third connection part 12 of the electrical connection assembly 100 is in direct contact with the heat exchange plate 50, which helps to quickly conduct the heat generated at the connection point to the heat exchange plate 50, and then effectively dissipate the heat through the heat exchange plate 50.

[0075] Therefore, by integrating the heat exchange plate 50 into the battery pack design and allowing the third connection portion 12 of the electrical connection assembly 100 to directly contact the heat exchange plate 50, the thermal management performance of the battery pack can be significantly improved, ensuring that the temperature of the cell 40 and the electrical connection assembly 100 is effectively controlled.

[0076] The electrical equipment according to a third aspect embodiment of the present invention includes an electrical connection assembly 100 according to the first aspect embodiment of the present invention, or a battery pack according to the second aspect embodiment of the present invention.

[0077] The electrical equipment according to the embodiments of this utility model, by applying the electrical connectors or battery packs in the above embodiments, can not only achieve efficient electrical connection and energy transmission, but also improve the reliability and safety of the system through optimized thermal management. In some embodiments, the electrical equipment can be a vehicle, ship, aircraft, or computer, etc., and this application does not limit it to this.

[0078] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0079] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0081] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrical connection assembly (100), characterized in that, include: The fusible part (16) is configured to fuse under predetermined conditions; An arc-extinguishing material component, wherein the arc-extinguishing material component covers the fusion section (16). The electrical connection assembly (100) includes: The first connector (10) includes a first connecting portion (11); The second connector (20) includes a second connecting part (21), and the first connecting part (11) and the second connecting part (21) are connected to each other; Both the first connecting part (11) and the second connecting part (21) include a sub-fusible part (161). The sub-fuse portion (161) of the first connecting portion (11) and the sub-fuse portion (161) of the second connecting portion (21) are opposite to and connected to form the fuse portion (16).

2. The electrical connection assembly (100) according to claim 1, characterized in that, Both the first connecting part (11) and the second connecting part (21) include a contact part (17). The contact parts (17) of the first connecting part (11) and the contact parts (17) of the second connecting part (21) are opposite to each other and connected. The cross-sectional area of ​​the sub-fuse part (161) is smaller than the cross-sectional area of ​​the contact part (17).

3. The electrical connection assembly (100) according to claim 2, characterized in that, The width of the sub-fuse portion (161) is smaller than the width of the contact portion (17).

4. The electrical connection assembly (100) according to claim 2, characterized in that, The arc-extinguishing material component includes a first sub-material component (32) and a second sub-material component (33). The first sub-material component (32) is located on the side of the first connecting portion (11) away from the second connecting portion (21), and the second sub-material component (33) is located on the side of the second connecting portion (21) away from the first connecting portion (11).

5. The electrical connection assembly (100) according to any one of claims 2-4, characterized in that, It also includes an encapsulation assembly (30), in which the fuse (16) and the arc-extinguishing material are disposed.

6. The electrical connection assembly (100) according to claim 5, characterized in that, The encapsulation component (30) includes: A housing (34) and a cover plate (35) are connected to define a receiving cavity (36), and the fusible part (16) and the arc-extinguishing material are disposed in the receiving cavity (36).

7. The electrical connection assembly (100) according to claim 6, characterized in that, The housing (34) and / or the cover plate (35) are high-temperature resistant insulating components.

8. The electrical connection assembly (100) according to claim 5, characterized in that, The first connector (10) further includes: A third connecting part (12) is connected at one end to one end of the first connecting part (11), and the other end of the third connecting part (12) extends to the outside of the encapsulation component (30).

9. The electrical connection assembly (100) according to claim 8, characterized in that, Also includes: A thermally conductive element (15) is disposed on the side of the third connection portion (12) adjacent to the encapsulation assembly (30); and / or, The heat-conducting element (15) is located on the other side of the third connection (12) away from the encapsulation assembly (30).

10. The electrical connection assembly (100) according to any one of claims 2-4, characterized in that, The second connector (20) further includes: a fourth connector (22), one end of which is connected to the second connector (21); The first connector (10) further includes a fifth connector (13), one end of which is connected to the first connector (11); The other end of the fourth connecting part (22) and the other end of the fifth connecting part (13) are respectively adapted to connect different cells (40) or cell groups.

11. The electrical connection assembly (100) according to any one of claims 1-4, characterized in that, The arc-extinguishing material is a quartz sand material.

12. The electrical connection assembly (100) according to any one of claims 1-4, characterized in that, The electrical connection assembly (100) is made of aluminum.

13. A battery pack, characterized in that, include: Multiple cells (40) or cell packs; An electrical connection assembly (100) is an electrical connection assembly (100) according to any one of claims 1-12, wherein the electrical connection assembly (100) connects two adjacent cells (40) or the electrical connection assembly (100) connects two adjacent groups of cells.

14. The battery pack according to claim 13, characterized in that, The battery pack also includes: The heat exchange plate (50) is provided with the battery cell (40) or the battery cell assembly, and the third connection part (12) of the electrical connection assembly (100) is in contact with the heat exchange plate (50).

15. An electrical appliance, characterized in that, Includes the electrical connection assembly (100) according to any one of claims 1-12, or the battery pack according to claim 13 or 14.

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