Electrical connection assembly and battery system

Abstract

The application provides an electric connection assembly and a battery system. The battery system comprises the electric connection assembly and a plurality of battery packs. Two battery packs are connected through the electric connection assembly. The electric connection assembly comprises an electric connector and a conductive piece. The conductive piece is connected with the electric connector. The conductive piece has a hard part and a flexible part. The hard part and the flexible part are arranged along the length direction of the conductive piece. The electric connection assembly and the battery pack improve the technical problem of inconvenient assembly between the plurality of battery packs.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to an electrical connection component and a battery system. Background Technology

[0002] In related technologies, electrical connection components include electrical connectors and wiring harnesses. The wiring harness connects two electrical connectors, and the electrical connectors are used to connect to a battery pack, thereby electrically connecting two battery packs. As the energy density of battery packs in related technologies increases, if a wiring harness is still used to connect two electrical connectors, a thicker wiring harness would be required to meet the current carrying capacity. Thicker wiring harnesses are difficult to bend, leading to inconvenience when assembling multiple battery packs. Utility Model Content

[0003] Embodiments of this application provide an electrical connection component and a battery system that can improve the technical problem of inconvenient assembly between multiple battery packs.

[0004] In a first aspect, embodiments of this application provide an electrical connection component, comprising:

[0005] Electrical connectors;

[0006] A conductive element is provided, which is connected to the electrical connector. The conductive element has a rigid portion and a flexible portion, which are arranged along the length of the conductive element. Because the electrical connector assembly has a flexible portion, the conductive element can be bent, thereby preventing interference between the conductive element and other external components or the battery pack.

[0007] In some embodiments, at least one rigid portion and one flexible portion are each included, and the rigid portion and the flexible portion are alternately arranged along the length direction of the conductive element. Thus, the number of rigid and flexible portions can be set as needed, and the rigid portion can be used as a support point for the flexible portion to prevent damage to the flexible portion due to excessive external force.

[0008] In some embodiments, the rigid portion includes two parts, and the flexible portion includes one part. Along the length of the conductive element, the flexible portion connects between the two rigid portions. That is, the rigid portions are located at both ends of the conductive element mainly for connection with the electrical connector, preventing the flexible portion from deforming after connection with the electrical connector, which could lead to poor contact between the flexible portion and the electrical connector. The flexible portion is located between the two rigid portions for bending the conductive element.

[0009] In some embodiments, the outer surface of the conductive component is covered with a first insulating layer. This first insulating layer serves to isolate the conductive component and prevent assembly personnel from being electrocuted by it.

[0010] In some embodiments, the electrical connection assembly further includes an electromagnetic shielding layer covering the outer surface of the first insulating layer. The electromagnetic shielding layer serves to shield magnetic fields, preventing the magnetic field generated by the conductive component from affecting external electrical equipment, and also preventing external magnetic fields from affecting the conductive component.

[0011] In some embodiments, the electrical connector includes a conductive housing that contacts the electromagnetic shielding layer. The conductive housing directs static electricity generated on the electromagnetic shielding layer to a designated location, preventing electrostatic damage to assembly personnel.

[0012] In some embodiments, the electrical connection assembly further includes a second insulating layer covering the outer surface of the electromagnetic shielding layer. The second insulating layer serves to isolate the electromagnetic shielding layer and prevent assembly personnel from directly contacting it.

[0013] In some embodiments, the electromagnetic shielding layer comprises galvanized steel wire mesh or tin-plated copper wire mesh. Galvanized steel wire mesh has the advantages of low cost and high tensile strength, while tin-plated copper wire mesh has the advantages of good electromagnetic shielding effect and good ductility, thus preventing damage to the electromagnetic shielding layer when bending conductive parts to a certain extent.

[0014] In some embodiments, the electrical connector includes:

[0015] Housing assembly;

[0016] A conductive terminal is provided, with its first end fixed within the housing assembly and its second end extending out of the housing assembly. A conductive element is electrically connected to the first end of the conductive terminal. The housing assembly provides protection for the connection points between the conductive terminal and the conductive element.

[0017] In some embodiments, the electrical connector further includes a locking member. The conductive terminal has a circular hole, and the conductive element has an oblong hole. The locking member passes through the oblong hole and the circular hole to lock the conductive element and the conductive terminal together and make them electrically connected. The maximum length L1 of the oblong hole is greater than the diameter D of the circular hole, and the minimum length L2 of the oblong hole is not less than the diameter D of the circular hole. The oblong hole design can be used to solve the problem that the locking member cannot lock the conductive element and the conductive terminal when there are tolerances in the conductive element.

[0018] In some embodiments, the maximum length L1 of the oblong hole and the diameter D of the circular hole satisfy the following relationship: 3mm ≤ L1 - D ≤ 4mm; and / or,

[0019] The minimum length L2 of the oblong hole is equal to the diameter D of the circular hole. When L1-D satisfies the above relationship, the oblong hole will not be too large, thus excessively reducing the structural strength of the conductive component; at the same time, the oblong hole will not be too small, allowing the design of the oblong hole to compensate for the tolerances of the conductive component. However, if the diameter D of the circular hole is too large than the minimum length L2 of the oblong hole, and the minimum length L2 of the oblong hole is too large than the diameter of the circular hole, the locking component may not be able to simultaneously contact the conductive component and the conductive terminal, preventing electrical connection between the conductive component and the conductive terminal.

[0020] In some embodiments, the housing assembly includes a conductive housing, and the conductive terminal has a third insulating layer covering at least its outer peripheral surface in contact with the conductive housing. This arrangement provides the following advantages: it prevents direct contact between the conductive terminal and the conductive housing, thus avoiding short circuits.

[0021] In some embodiments, the housing assembly has a clearance hole, and the conductive terminal includes a straight section and a bent section connected to each other. The bent section is located inside the housing assembly and is electrically connected to the conductive element, while the straight section extends out of the housing assembly through the clearance hole. The design of the straight and bent sections improves the connection stability between the conductive terminal and the housing assembly and facilitates the assembly of the conductive terminal and the housing assembly.

[0022] In some embodiments, the housing assembly includes a first housing and a second housing, wherein:

[0023] The first housing is provided with a first latching portion, and the second housing is provided with a second latching portion that mates with the first latching portion. The first latching portion and the second latching portion mate to fix the first housing to the second housing; and / or,

[0024] The electrical connector further includes a locking part. A first locking engagement part is provided on the first housing, and a second locking engagement part is provided on the second housing. The locking part engages with both the first and second locking engagement parts to fix the first housing to the second housing. This configuration, through the engagement of the first and second locking engagement parts, as well as the engagement of the locking part, the first locking engagement part, and the second locking engagement part, provides a dual fixing effect between the first and second housings, improving the connection stability between them.

[0025] In some embodiments, the hard portion includes at least one of a hard copper busbar, a hard aluminum busbar, a hard copper alloy busbar, or a hard aluminum alloy busbar; and / or,

[0026] The flexible component includes at least one of flexible copper busbar, flexible aluminum busbar, flexible copper alloy busbar, or flexible aluminum alloy busbar. Using hard copper busbar, hard copper alloy busbar, flexible copper busbar, or flexible copper alloy busbar enables the conductive component to have better overload capacity. Using hard aluminum busbar, hard aluminum alloy busbar, flexible aluminum busbar, or flexible aluminum alloy busbar can reduce the manufacturing cost of the electrical connection assembly to a certain extent.

[0027] Secondly, embodiments of this application provide a battery system comprising a plurality of battery packs, and the battery system further comprising the aforementioned electrical connection component, wherein two of the battery packs are connected via the electrical connection component.

[0028] Compared to related technologies, this application has a conductive component that has both rigid and flexible parts, and the rigid and flexible parts are arranged along the length of the conductive component. Therefore, when assembling electrical connectors between two battery packs, if interference occurs between the conductive component and other external components or battery packs, the assembler can bend the flexible part of the conductive component to allow it to avoid interference with other external components or battery packs, thereby improving the assembly efficiency between battery packs. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an assembly diagram of the battery system provided in an embodiment of this application;

[0031] Figure 2 This is a perspective view of the electrical connection assembly provided in an embodiment of this application;

[0032] Figure 3 This is a three-dimensional schematic diagram of the conductive element provided in an embodiment of this application;

[0033] Figure 4 This is a cross-sectional view of the conductive element provided in an embodiment of this application;

[0034] Figure 5 This is an exploded structural diagram of an electrical connection assembly provided in an embodiment of this application;

[0035] Figure 6 This is a partial structural schematic diagram of the electrical connection assembly provided in an embodiment of this application (with the first housing removed);

[0036] Figure 7 for Figure 6 Enlarged schematic diagram of region I;

[0037] Figure 8 A partial structural cross-sectional view of an electrical connection assembly provided for an embodiment of this application (with the first housing removed);

[0038] Figure 9 A schematic diagram of the structure of the first housing provided for an embodiment of this application;

[0039] Figure 10 A schematic diagram of the structure of the second housing provided for an embodiment of this application.

[0040] 1. Battery system; 2. Battery pack; 3. Electrical connection assembly; 10. Electrical connector; 11. Housing assembly; 12. Conductive terminal; 20. Conductive component; 21. Rigid part; 22. Flexible part; 30. First insulating layer; 40. Electromagnetic shielding layer; 50. Second insulating layer; 60. Third insulating layer; 110. Conductive housing; 111. First housing; 112. Second housing; 120. Circular hole; 121. Straight section; 122. Bending section; 201. Oval hole; 1111. First snap-fit ​​part; 1112. First locking fit part; 1113. Disassembly part; 1121. Second snap-fit ​​part; 1122. Second locking fit part; 11131. Semi-circular disassembly plate; 11132. Rectangular disassembly plate. Detailed Implementation

[0041] 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 the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0042] It should be explained in detail that in related technologies, if the energy density of the battery pack is higher, the cables within the electrical connection assembly need to be designed to be thicker in order for the electrical connection assembly to withstand a larger current. Thicker cables increase cable rigidity and make them more difficult to bend. When connecting two battery packs through the electrical connection assembly, the difficulty in bending the cables makes them prone to interference with other external components, causing installation difficulties.

[0043] To address the problems existing in the relevant technologies, see [link to relevant documentation]. Figures 1 to 3 This application provides a battery system 1, which includes an electrical connection assembly 3 and multiple battery packs 2. Each battery pack 2 includes a circuit protection board (not shown) and multiple cell modules (not shown). The circuit protection board is mainly used to monitor the voltage, temperature, circuit, and other parameters of the cell modules, and provides overcurrent and overtemperature protection for the cell modules. Each cell module is connected to the circuit protection board. The electrical connection assembly 3 is used to connect one battery pack 2 to another battery pack 2 to achieve series connection between the battery packs 2. The electrical connection assembly 3 includes an electrical connector 10 and a conductive element 20. The conductive element 20 is connected to the electrical connector 10. The conductive element 20 has a rigid portion 21 and a flexible portion 22, which are arranged along the length direction of the conductive element 20. Figure 1 The conductive component 20 extends from one electrical connector 10 to another electrical connector 10. It is worth noting that in this application, the flexible portion 22 is more flexible than the rigid portion 21, meaning that the flexible portion 22 is less prone to damage after bending.

[0044] In this embodiment, since the conductive member 20 has not only a rigid part 21 but also a flexible part 22, and the rigid part 21 and the flexible part 22 are arranged along the length direction of the conductive member 20, when assembling the electrical connector 10 between the two battery packs 2, if the conductive member 20 interferes with other external components or the battery pack 2, the assembler can bend the flexible part 22 of the conductive member 20, so that the conductive member 20 avoids other external components or the battery pack 2, thereby avoiding interference between the conductive member 20 and other external components or the battery pack 2, so as to improve the assembly efficiency between the battery packs 2.

[0045] In some embodiments, at least one rigid portion 21 and one flexible portion 22 are included, and the rigid portion 21 and flexible portion 22 are alternately arranged along the length direction of the conductive member 20. In a specific embodiment, there may be multiple rigid portions 21 and multiple flexible portions 22. "Alternating arrangement of rigid portions 21 and flexible portions 22 along the length direction of the conductive member 20" means that a flexible portion 22 is provided between two adjacent rigid portions 21, or a rigid portion 21 is provided between two adjacent flexible portions 22. One advantage of this arrangement is that the rigid portion 21 can be used as a support point. For example, the rigid portion 21 can be attached to the corner of the outer shell of the battery pack 2. This solves the problem that when the flexible portion 22 is in contact with the corner of the outer shell of the battery pack 2, excessive external force is applied to the flexible portion 22 at the corner of the outer shell of the battery pack 2, which can easily lead to damage to the flexible portion 22.

[0046] In some embodiments, the rigid portion 21 includes two parts, and the flexible portion 22 includes one part. Along the length direction of the conductive member 20, the flexible portion 22 is connected between the two rigid portions 21.

[0047] Specifically, the rigid portion 21 is disposed at both ends of the conductive member 20 along its length to facilitate connection with the electrical connector 10. If the flexible portion 22 is used to connect with the electrical connector 10, deformation of the flexible portion 22 may lead to poor contact between the flexible portion 22 and the electrical connector 10, or the flexible portion 22 may connect with other external conductive devices, causing a short circuit in the electrical connector 10. Therefore, in this embodiment, the rigid portion 21 is located at the end of the conductive member 20 for connection with the electrical connector 10. The flexible portion 22 is disposed in the middle of the conductive member 20 so that the conductive member 20 can be bent during installation of the electrical connection assembly 3, thereby adjusting the position of the conductive member 20 and preventing interference between the conductive member 20 and other external components or the battery pack 2.

[0048] like Figure 4 As shown, the outer surface of the conductive component 20 is covered with a first insulating layer 30. In this embodiment, the first insulating layer 30 is designed to isolate the conductive component 20, preventing assembly personnel from being electrocuted by the current on the conductive component 20 when adjusting its position or bending it.

[0049] In some embodiments, the electrical connection assembly 3 further includes an electromagnetic shielding layer 40, which covers the outer surface of the first insulating layer 30. It is understood that because the battery pack 2 transmits a large current, this results in a large magnetic field being generated on the conductive component 20. This magnetic field may affect external electrical equipment or the battery pack 2. Therefore, in this embodiment, an electromagnetic shielding layer 40 is provided on the outer periphery of the first insulating layer 30 to isolate the magnetic field generated by the conductive component 20 from affecting other external components. Furthermore, the electromagnetic shielding layer 40 can also prevent external magnetic fields from entering the conductive component 20 and affecting it. It is also worth mentioning that the electromagnetic shielding layer 40 may be made of conductive material. Therefore, in this embodiment, the first insulating layer 30 can also prevent the electromagnetic shielding layer 40 from directly contacting the conductive component 20, thus preventing electromagnetic shielding failure of the electromagnetic shielding layer 40.

[0050] In some embodiments, the electrical connector 10 includes a conductive housing 110 that contacts the electromagnetic shielding layer 40.

[0051] Specifically, if the electromagnetic shielding layer 40 is made of a conductive material, the magnetic field emitted by the conductive component 20 may induce a current on the electromagnetic shielding layer 40. To prevent operators from being electrocuted by the induced current on the electromagnetic shielding layer 40 when they come into contact with it, in this embodiment, the electromagnetic shielding layer 40 is in contact with the conductive housing 110, thereby conducting the current on the electromagnetic shielding layer 40 through the conductive housing 110. In some embodiments, after the electrical connector 10 is installed on the battery pack 2, the conductive housing 110 contacts the outer housing of the battery pack 2. The outer housing of the battery pack 2 is usually conductive and connected to the ground wire. That is, the induced current on the electromagnetic shielding layer 40 is conducted to the ground in sequence through the conductive housing 110, the outer housing of the battery pack 2, and the ground wire.

[0052] Since the outer surface of the first insulating layer 30 is covered with the electromagnetic shielding layer 40, in some embodiments, the electrical connection assembly 3 further includes a second insulating layer 50, which covers the outer surface of the electromagnetic shielding layer, thereby isolating the electromagnetic shielding layer 40 and preventing the current on the electromagnetic shielding layer 40 from flowing into the human body when the assembly personnel assemble the electrical connection assembly 3.

[0053] In some embodiments, the electromagnetic shielding layer 40 comprises galvanized steel wire mesh or tin-plated copper wire mesh. Specifically, galvanized steel wire mesh has the advantages of low cost and high tensile strength. Since the conductive element 20 may need to be bent repeatedly during the installation of the electrical connection assembly 3, if the tensile strength of the electromagnetic shielding layer 40 is low, it may be damaged. Tin-plated copper wire mesh, on the other hand, has the advantage of better electromagnetic shielding effect, and thanks to the good ductility of copper wire, the electromagnetic shielding layer 40 is less likely to be damaged when bending the conductive element 20.

[0054] like Figure 5 As shown, in some embodiments, the electrical connector 10 includes a housing assembly 11 and a conductive terminal 12. A first end of the conductive terminal 12 is fixed within the housing assembly 11, and a second end of the conductive terminal 12 extends out of the housing assembly 11. A conductive element 20 is electrically connected to the first end of the conductive terminal 12. Specifically, when assembling the battery pack 2 and the electrical connection assembly 3, the conductive element 20 is first inserted into the housing assembly 11 and connected to the first end of the conductive terminal 12, and then the second end of the conductive terminal 12 is connected to the battery pack 2. Furthermore, the housing assembly 11 protects the connection between the conductive terminal 12 and the conductive element 20, preventing external environmental influences on the connection.

[0055] In some embodiments, such as Figure 6 and Figure 7As shown, the electrical connector 10 also includes a locking member (not shown in the figure). The conductive terminal 12 has a circular hole 120, and the conductive member 20 is provided with an oblong hole 201. The locking member passes through the oblong hole 201 and the circular hole 120 to lock the conductive member 20 with the conductive terminal 12 and make them electrically connected. The maximum length L1 of the oblong hole 201 is greater than the diameter D of the circular hole 120, and the minimum length L2 of the oblong hole 201 is not less than the diameter D of the circular hole 120.

[0056] In actual assembly of the conductive terminal 12 and the conductive element 20, since the outer surface of the conductive element 20 is covered with a first insulating layer 30 and a second insulating layer 50, the conductive element 20 and the conductive terminal 12 will not be directly electrically connected after contact. Instead, a locking member is needed to lock the conductive terminal 12 and the conductive element 20 together, thus making them electrically connected. Furthermore, during the manufacturing of the conductive element 20, certain tolerances may exist. If the tolerance is large, the conductive element 20 may not be able to be locked onto the conductive terminal 12 by the locking member. Therefore, in this embodiment, the conductive element 20 has an oblong hole 201 for the locking member to pass through, and the maximum length L1 of the oblong hole 201 is greater than the diameter D of the circular hole 120. That is, after the locking member passes through the oblong hole 201, the conductive element 20 can still be adjusted in position, ultimately allowing the conductive element 20 to be adjusted so that the oblong hole 201 is directly opposite the circular hole 120. Meanwhile, the minimum length L2 of the oblong hole 201 is not less than the diameter D of the circular hole 120, so that when the conductive component 20 and the conductive terminal 12 are installed, the projection surface of the circular hole 120 can fall into the projection surface of the oblong hole 201. This avoids excessive offset between the circular hole 120 and the locking component after the locking component locks the conductive component 20 and the conductive terminal 12, which may cause the locking component to not contact the side wall of the circular hole 120 and thus prevent the conductive component 20 and the conductive terminal 12 from being connected.

[0057] In some embodiments, the maximum length L1 of the oblong hole 201 and the diameter D of the circular hole 120 satisfy the following relationship: 3mm ≤ L1-D ≤ 4mm. When L1-D satisfies this relationship, the oblong hole 201 will not be too large, thus excessively reducing the structural strength of the conductive component 20; at the same time, the oblong hole 201 will not be too small, allowing its design to compensate for the tolerances of the conductive component 20. However, when L1-D is greater than 4mm, the oblong hole 201 needs to be too large, resulting in insufficient structural strength of the conductive component 20. When L1-D is less than 3mm, the oblong hole 201 is too small, which may cause the locking component to abut against the arcuate sidewall of the oblong hole 201, preventing connection between the oblong hole 201 and the circular hole 120. In other words, the design of the oblong hole 201 may not be able to compensate for the tolerances of the conductive component 20. The values ​​of L1-D can be 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, and 4.0mm, etc.

[0058] like Figure 7 As shown, the minimum length L2 of the oblong hole 201 is equal to the diameter D of the circular hole 120. Specifically, when the minimum length of the oblong hole 201 is the same as the diameter of the circular hole 120, after the locking member locks the conductive member 20 and the conductive terminal 12, the locking member can simultaneously contact the inner wall surfaces of both the circular hole 120 and the oblong hole 201. This prevents the minimum length L2 of the oblong hole 201 from being too much larger than the diameter of the circular hole 120, which would cause the locking member to only contact the inner wall surface of the circular hole 120 after locking the conductive member 20 and the conductive terminal 12. Similarly, if the diameter of the circular hole 120 is too much larger than the minimum length L2 of the oblong hole 201, it may cause the locking member to only contact the inner wall surface of the oblong hole 201 and not the inner wall surface of the circular hole 120.

[0059] Furthermore, the housing assembly 11, i.e., the conductive housing 110, needs to conduct the current on the electromagnetic shielding layer 40 to the outer shell of the battery pack 2 through the conductive housing 110. Therefore, in some embodiments, the conductive terminal 12 is covered with a third insulating layer 60 at least on its outer peripheral surface that contacts the conductive housing 110. That is, through the design of the third insulating layer 60, the conductive terminal 12 and the conductive housing 110 will not be in direct contact, which can prevent the current on the electromagnetic shielding layer 40 from entering the battery pack through the conductive housing 110 and the conductive terminal 12 in sequence, thus preventing damage to the battery pack 2. In addition, the conductive housing 110 is a metal housing to enhance the structural strength of the electrical connector 10. In some embodiments, the first insulating layer 30, the second insulating layer 50, and the third insulating layer 60 can all be cross-linked polyethylene layers or ethylene propylene rubber layers.

[0060] like Figure 8As shown, in some embodiments, the housing assembly 11 has a clearance hole (not shown in the figure), and the conductive terminal 12 includes a straight section 121 and a bent section 122 connected to each other. The bent section 122 is located inside the housing assembly 11 and is electrically connected to the conductive element 20. The straight section 121 passes through the clearance hole and exits the housing assembly 11.

[0061] With this configuration, when assembling the conductive component 20 and the bent section 122, the straight section 121 passes through the clearance hole. At this time, the bent section 122 abuts against the inner wall surface of the housing assembly 11. That is, even without the locking member installed, the conductive terminal 12 is not easily separated from the housing assembly 11. On the other hand, when the locking member fixes the conductive terminal 12 and the conductive component 20, the bent section 122 abuts against the inner wall surface of the housing assembly 11. The inner wall surface of the housing assembly 11 provides support for the bent section 122, thereby improving the installation stability of the conductive terminal 12. In this embodiment, the locking member can be a bolt. In a specific embodiment, the bent section 122 and the straight section 121 are arranged perpendicularly.

[0062] See Figure 9 and Figure 10 As shown, in some embodiments, the housing assembly 11 includes a first housing 111 and a second housing 112. The first housing 111 is provided with a first snap-fit ​​portion 1111, and the second housing 112 is provided with a second snap-fit ​​portion 1121 that cooperates with the first snap-fit ​​portion 1111. The first snap-fit ​​portion 1111 and the second snap-fit ​​portion 1121 cooperate to fix the first housing 111 to the second housing 112.

[0063] Specifically, the housing assembly 11 has a mounting groove, and the first housing 111 covers the second housing 112 and surrounds it to form the mounting groove. The housing assembly 11 is used to protect the connection between the conductive terminal 12 and the conductive component 20. In this embodiment, the first housing 111 and the second housing 112 are engaged by the first snap-fit ​​part 1111 and the second snap-fit ​​part 1121, so as to facilitate quick disassembly and installation of the first housing 111 and the second housing 112, and to enable quick maintenance when the conductive component 20 and the conductive terminal 12 are damaged. In some embodiments, the first snap-fit ​​part 1111 includes a snap protrusion, and the second snap-fit ​​part 1121 includes a snap fastener, which engages with the snap protrusion.

[0064] In some embodiments, the electrical connector 10 further includes a locking portion (not shown in the figure), a first locking engagement portion 1112 is provided on the first housing 111, and a second locking engagement portion 1122 is provided on the second housing 112. The locking portion engages with the first locking engagement portion 1112 and the second locking engagement portion 1122 to fix the first housing 111 to the second housing 112.

[0065] Specifically, the locking part includes a bolt, and both the first locking engagement part 1112 and the second locking engagement part 1122 are threaded holes. The bolt passes through the threaded holes of the first housing 111 and the second housing 112 to fix the first housing 111 to the second housing 112. In a specific embodiment, the first housing 111 is provided with both the first snap-fit ​​part 1111 and the first locking engagement part 1112, and the second housing 112 is provided with both the second snap-fit ​​part 1121 and the second locking engagement part 1122. This arrangement provides a double fixing effect between the first housing 111 and the second housing 112, improving the connection stability between the first housing 111 and the second housing 112. Similarly, in this embodiment, the first snap-fit ​​part includes a snap protrusion, the second snap-fit ​​part includes a snap buckle, the first locking engagement part 1112 and the second locking engagement part 1122 are both threaded holes, and the locking part is a bolt.

[0066] In some embodiments, a disassembly portion 1113 is provided on the first housing 111. The disassembly portion 1113 is used to detach from the first housing 111 under external force, thereby forming an opening on the first housing 111 for the conductive component 20 to enter the mounting groove. The disassembly portion 1113 includes a semi-circular disassembly plate 11131 and a rectangular disassembly plate 11132. When the conductive component 20 is a cable, the semi-circular disassembly plate 11131 can be disassembled to allow the cable to enter the mounting groove. When the conductive component 20 is a conductive busbar, the rectangular disassembly plate 11132 can be disassembled to allow the conductive busbar to enter the mounting groove.

[0067] In some embodiments, the rigid portion 21 includes at least one of a rigid copper busbar, a rigid aluminum busbar, a rigid copper alloy busbar, or a rigid aluminum alloy busbar. In some embodiments, the flexible portion 22 includes at least one of a flexible copper busbar, a flexible aluminum busbar, a flexible copper alloy busbar, or a flexible aluminum alloy busbar.

[0068] In one specific embodiment, the rigid part 21 includes a rigid copper busbar, and the flexible part 22 includes a flexible copper busbar. When processing the flexible copper busbar, a common lamination process can be used, i.e., welding multiple layers of thin copper busbars together. Alternatively, a pressing process can be used, i.e., cold or hot pressing multiple thin copper wires to form a flexible copper busbar. Of course, the flexible copper busbar can also use a hollowing process or other related processes; any other variations within the scope of this application are within the protection scope of this application. Furthermore, using rigid copper busbars, rigid copper alloy busbars, flexible copper busbars, and flexible copper alloy busbars can give the conductive component 20 better overload capacity. Using rigid aluminum busbars, rigid aluminum alloy busbars, flexible aluminum busbars, and flexible aluminum alloy busbars can reduce the manufacturing cost of the electrical connection component 3 to a certain extent. In addition, the flexible part 22 can also use a flexible copper-clad aluminum busbar, and the rigid part 21 can use a rigid copper-clad aluminum busbar. Copper-clad aluminum busbars are less expensive than copper busbars, while offering better conductivity and ductility than aluminum busbars.

[0069] In summary, the electrical connection assembly 1 and the battery system 1 of this application have at least the following beneficial effects:

[0070] (1) The conductive part 20 is provided with not only a rigid part 21, but also a flexible part 22, so that the conductive part 20 can be bent by the flexible part 22, thereby avoiding interference between the conductive part 20 and the battery pack 2 or other external components when assembling the battery pack 2.

[0071] (2) The outer periphery of the conductive component 20 is sequentially covered with a first insulating layer 30, an electromagnetic shielding layer 40, and a second insulating layer 50. While improving the insulation effect of the conductive component 20, the electromagnetic shielding layer 40 can shield electromagnetic fields, preventing external magnetic fields from affecting the conductive component 20, or the magnetic field generated by the conductive component 20 from affecting other external components. The first insulating layer 30 prevents the conductive component 20 from directly contacting the electromagnetic shielding layer 40, and the second insulating layer 50 prevents assembly personnel from directly contacting the conductive component 20 or the electromagnetic shielding layer 40, reducing the risk of electric shock to assembly personnel.

[0072] (3) A circular hole 120 is provided on the conductive terminal 12, and an oblong hole 201 is provided on the conductive component 20. The maximum length L1 of the oblong hole 201 is greater than the diameter D of the circular hole 120, and the minimum length L2 of the oblong hole 201 is not less than the diameter D of the circular hole 120. One purpose of this design is that if there are tolerances in the manufacturing of the conductive component 20, the assembler can adjust the position of the locking component passing through the oblong hole 201 and the circular hole 120, thereby solving the tolerance problem of the conductive component 20.

[0073] (4) The housing assembly 11 adopts a conductive housing 110, and the electromagnetic shielding layer 40 is in contact with the conductive housing 110 so that the current on the electromagnetic shielding layer 40 can be transferred through the conductive housing 110 to the outer housing of the battery pack 2 and finally flow into the ground, thereby improving the safety performance of the electrical connection assembly 3.

[0074] (5) The first housing 111 is provided with a first snap-fit ​​part 1111 and a first locking engagement part 1112, and the second housing 112 is provided with a second snap-fit ​​part 1121 and a second locking engagement part 1122. That is, the first housing 111 and the second housing 112 not only adopt a snap-fit ​​connection method, but also a locking engagement connection method, which improves the connection stability between the first housing 111 and the second housing 112.

[0075] The embodiments of this application have been described in detail above. Specific examples have been used 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 method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electrical connection assembly (3), characterized in that, include: Electrical connector (10); A conductive element (20) is connected to the electrical connector (10). The conductive element (20) has a rigid part (21) and a flexible part (22), which are arranged along the length of the conductive element (20).

2. The electrical connection assembly (3) according to claim 1, characterized in that, The rigid part (21) and the flexible part (22) are each included at least one, and the rigid part (21) and the flexible part (22) are alternately arranged along the length direction of the conductive member (20).

3. The electrical connection assembly (3) according to claim 2, characterized in that, The rigid part (21) includes two parts, and the flexible part (22) includes one part. Along the length direction of the conductive member (20), the flexible part (22) is connected between the two rigid parts (21).

4. The electrical connection assembly (3) according to any one of claims 1 to 3, characterized in that, The outer surface of the conductive element (20) is covered with a first insulating layer (30).

5. The electrical connection assembly (3) according to claim 4, characterized in that, The electrical connection assembly (3) further includes an electromagnetic shielding layer (40) which covers the outer surface of the first insulating layer (30).

6. The electrical connection assembly (3) according to claim 5, characterized in that, The electrical connector (10) includes a conductive housing (110) that is in contact with the electromagnetic shielding layer (40).

7. The electrical connection assembly (3) according to claim 5, characterized in that, The electrical connection assembly (3) further includes a second insulating layer (50) which covers the outer surface of the electromagnetic shielding layer (40).

8. The electrical connection assembly (3) according to claim 5, characterized in that, The electromagnetic shielding layer (40) includes galvanized steel wire mesh or tin-plated copper wire mesh.

9. The electrical connection assembly (3) according to any one of claims 1 to 3, characterized in that, The electrical connector (10) includes: Housing assembly (11); A conductive terminal (12) is provided, with its first end fixed inside the housing assembly (11) and its second end extending out of the housing assembly (11). The conductive element (20) is electrically connected to the first end of the conductive terminal (12).

10. The electrical connection assembly (3) according to claim 9, characterized in that, The electrical connector (10) further includes a locking member. The conductive terminal (12) has a circular hole (120). The conductive member (20) is provided with a waist-shaped hole (201). The locking member passes through the waist-shaped hole (201) and the circular hole (120) to lock the conductive member (20) and the conductive terminal (12) together and make them electrically connected. The maximum length L1 of the waist-shaped hole (201) is greater than the diameter D of the circular hole (120), and the minimum length L2 of the waist-shaped hole (201) is not less than the diameter D of the circular hole (120).

11. The electrical connection assembly (3) according to claim 10, characterized in that, The maximum length L1 of the oblong hole (201) and the diameter D of the circular hole (120) satisfy the following relationship: 3mm ≤ L1 - D ≤ 4mm; and / or, The minimum length L2 of the waist-shaped hole (201) is equal to the diameter D of the circular hole (120).

12. The electrical connection assembly (3) according to claim 9, characterized in that, The housing assembly (11) includes a conductive housing (110), and the conductive terminal (12) is covered with a third insulating layer (60) on its outer peripheral surface that is in contact with the conductive housing (110).

13. The electrical connection assembly (3) according to claim 9, characterized in that, The housing assembly (11) has a clearance hole. The conductive terminal (12) includes a straight section (121) and a bent section (122) connected to each other. The bent section (122) is located inside the housing assembly (11) and is electrically connected to the conductive element (20). The straight section (121) passes through the clearance hole and exits the housing assembly (11).

14. The electrical connection assembly (3) according to claim 9, characterized in that, The housing assembly (11) includes a first housing (111) and a second housing (112), wherein: The first housing (111) is provided with a first latching portion (1111), and the second housing (112) is provided with a second latching portion (1121) that mates with the first latching portion (1111). The first latching portion (1111) and the second latching portion (1121) mate to fix the first housing (111) to the second housing (112); and / or, The electrical connector (10) further includes a locking part. The first housing (111) is provided with a first locking engagement part (1112), and the second housing (112) is provided with a second locking engagement part (1122). The locking part cooperates with the first locking engagement part (1112) and the second locking engagement part (1122) to fix the first housing (111) to the second housing (112).

15. The electrical connection assembly (3) according to any one of claims 1 to 3, characterized in that, The hard portion (21) includes at least one of a hard copper busbar, a hard aluminum busbar, a hard copper alloy busbar, or a hard aluminum alloy busbar; and / or, The flexible part (22) includes at least one of flexible copper busbar, flexible aluminum busbar, flexible copper alloy busbar or flexible aluminum alloy busbar.

16. A battery system (1), characterized in that, The battery system (1) includes a plurality of battery packs (2), and the battery system (1) further includes an electrical connection component (3) as claimed in any one of claims 1 to 15, wherein two of the battery packs (2) are connected via the electrical connection component (3).

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