Battery pack cutting unit

Abstract

This invention provides a battery pack cutting unit (BDU) that allows for a more compact overall layout and a lighter, thinner design by increasing the area of ​​conductive sheets in each planar layer and connecting them to electrical components via connection points. [Solution] The BDU comprises an electrical connection assembly 3 in which electrical components (rapid charging positive electrode relay 21, fuse 25, current sensor 26, etc.), a first conductive array 31 including a first conductive sheet 310 and a first connecting part 311 connected to each other, and a second conductive array 32 including a second conductive sheet 320 and a second connecting part 321 connected to each other, a planar layer in which the first conductive sheets are located and a planar layer in which the second conductive sheets are located are stacked and arranged, the plurality of first conductive sheets and the plurality of second conductive sheets are arranged in each planar layer with gaps between them, and the first connecting part and the second connecting part are electrically connected to the electrical components, respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a battery pack disconnection unit.

Background Art

[0002] With the development of high-voltage battery technologies such as electric vehicles and energy storage systems, the battery pack disconnection unit (BDU) plays an important role as one of the core components in the battery management system. The BDU is mainly used to safely disconnect the connection between the battery and the electrical system in case of battery failures or emergencies, and protect the battery from electrical faults such as short circuits and overloads. The BDU usually includes electrical components such as relays, fuses, contactors, etc., and is used to realize the control and protection of the battery circuit.

[0003] However, there are still certain technical defects in the design of the conventional BDU, especially in terms of the utilization of internal space and volume optimization. Since there are many electrical components integrated inside the BDU, in order to realize the electrical connection between each component, it is usually necessary to use metal conductive rows, and the design and arrangement of the metal conductive rows in the BDU are important issues. In the conventional BDU design, these electrical components are often arranged horizontally, and the metal conductive rows are connected by separating the positive and negative electrodes.

[0004] However, the horizontal layout method faces the problem of spatial limitations during design. Due to spatial limitations, the width of the metal conductive row often cannot be made wide enough, and its thickness must be increased to ensure the current-carrying capacity. With such a design, the overall volume of the electrical components inside the BDU becomes extremely large after assembly, making it difficult to achieve the goal of weight reduction. In addition, the narrow width of the metal conductive row design limits the room for optimizing electrical connections, resulting in a decrease in electrical performance and poor heat dissipation, which may affect the safety and reliability of the BDU.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the shortcomings of the above-mentioned prior art, the present invention provides a battery pack cutting unit that can solve the problem that the overall volume of the BDU after assembly becomes enormous and cannot be reduced in weight due to the design and arrangement of the metal conductive array inside the BDU. [Means for solving the problem]

[0006] The technical proposal of this invention is realized as follows.

[0007] The battery pack cutting unit of the present invention is Electrical components and, The device comprises a plurality of first conductive arrays including a first conductive sheet and a first connecting portion connected to the first conductive sheet, and a plurality of second conductive arrays including a second conductive sheet and a second connecting portion connected to the second conductive sheet. Multiple first conductive sheets are arranged at intervals in the same planar layer, and multiple second conductive sheets are arranged at intervals in the same planar layer, and the planar layer on which the first conductive sheets are located and the planar layer on which the second conductive sheets are located are laminated together. The first connection portion and the second connection portion each include an electrical connection assembly that is electrically connected to the electrical component. It is characterized by the following.

[0008] In the above technical proposal, preferably, an upper housing having holes is further provided, a plurality of electrical components are provided, the plurality of electrical components are fixed to one side of the upper housing at intervals, the first conductive sheet and the second conductive sheet are located on the other side of the upper housing, and the first connecting portion and the second connecting portion are electrically connected to the electrical components via the holes, respectively.

[0009] In the above-described technical proposal, preferably, an insulating layer is provided between the first conductive sheet and the second conductive sheet.

[0010] In the above-described technical proposal, preferably, a heat dissipation layer is further provided between the first conductive sheet and the second conductive sheet, the insulating layer includes an upper insulating layer and a lower insulating layer, and the heat dissipation layer is located between the upper insulating layer and the lower insulating layer.

[0011] In the above-described technical proposal, preferably, the thickness of both the first conductive sheet and the second conductive sheet is 0.3 mm to 3 mm.

[0012] In the above-described technical proposal, preferably, auxiliary conductive pieces are fixed to the electrical connection points between the first connection portion or the second connection portion and the electrical component.

[0013] In the above technical proposal, preferably, In the first conductive array, a first conductive connecting piece is provided between the first connecting portion which is electrically connected to the two electrical components, and the electrical components are electrically connected to both ends of the first conductive connecting piece. In the second conductive array, a second conductive connecting piece is provided between the second connecting portion which is electrically connected to the two electrical components, and the electrical components are electrically connected to both ends of the second conductive connecting piece.

[0014] In the above technical proposal, preferably, the first conductive sheet has at least one vertically positioned first pin, the second conductive sheet has at least one vertically positioned second pin, the surface of the upper housing has at least one connection seat, and both the first and second pins penetrate the upper housing and are located within the connection seat.

[0015] In the above technical proposal, preferably, the first connection portion includes a first vertical sheet connected to the first conductive sheet, the second connection portion includes a second vertical sheet connected to the second conductive sheet, the electrical components include a plurality of relays, and when the electrical connection points of the relays are located on the side wall, the first vertical sheet and the second vertical sheet are each electrically connected to the electrical connection points of the relays.

[0016] In the above technical proposal, preferably, the electrical connection assembly further comprises a bottom housing provided on one side away from the upper housing, the bottom housing being provided with a plurality of first connectors and second connectors, both of which penetrate the first conductive sheet, the second conductive sheet and the upper housing and extend to the outside of the upper housing. At least a portion of the first connection further includes a first horizontal sheet that is perpendicularly connected to one end of the first vertical sheet away from the first conductive sheet, the first horizontal sheet being fixedly connected to the end face of the first connector. At least a portion of the second connection further includes a second horizontal sheet that is perpendicularly connected to one end of the second vertical sheet away from the second conductive sheet, the second horizontal sheet being fixedly connected to the end face of the second connector.

[0017] In the above technical proposal, preferably, the electrical component further comprises at least one fuse having a first electrical connection end and a second electrical connection end provided opposite to each other, the surface of the upper housing having a first support portion, the first electrical connection end being fixed to the first support portion, the second electrical connection end being provided on the top surface of the first horizontal sheet, and the second electrical connection end being fixedly connected to the first horizontal sheet via a first connector.

[0018] In the above technical proposal, preferably, the electrical component further comprises a current sensor, the surface of the upper housing has a second support portion, one end of the current sensor is fixed horizontally to the second support portion, the other end of the current sensor is provided horizontally on the top surface of the second horizontal sheet, and the end of the current sensor away from the second support portion is fixedly connected to the second horizontal sheet via a second connector. [Effects of the Invention]

[0019] The present invention has the following beneficial effects compared to the prior art.

[0020] (1) By arranging multiple first conductive sheets at intervals on the same planar layer, and multiple second conductive sheets at intervals on the same planar layer, and by stacking the planar layer where the first conductive sheets are located and the planar layer where the second conductive sheets are located, the arrangement area of ​​these conductive sheets on each planar layer is increased, and their arrangement becomes more compact. With this arrangement, the first and second conductive sheets do not occupy unnecessary vertical space, and the utilization rate of the internal space of the battery pack cutting unit is effectively improved. At the same time, by electrically connecting the first and second connection parts to the electrical components, multiple electrical components and conductive rows are not arranged to intersect in the same horizontal direction, making the overall structure of the battery pack cutting unit more compact and lightweight. Compared to conventional arrangements, this design not only saves more internal space but also effectively improves the overall performance of the battery pack and can meet the design needs for high energy density and weight reduction.

[0021] (2) Since the first conductive sheet and the second conductive sheet are laminated on one side of the upper housing away from the electrical components, their arrangement is relatively compact and they do not occupy a large space in the vertical direction [L1] inside the upper housing. Furthermore, the electrical components are located on the other side of the upper housing, and the first and second connection parts penetrate the top surface of the upper housing and, after connecting to the electrical components, do not occupy any internal space in the vertical direction of the upper housing. Therefore, the overall thickness of the battery pack cutting unit is basically determined by the total thickness of the electrical components and the upper housing, resulting in a lightweight design.

[0022] (3) By designing the upper insulating layer, heat dissipation layer, and lower insulating layer to be stacked, such a design is not only structurally compact, but also effectively utilizes space and can combine heat dissipation and electrical isolation functions. Compared to conventional heat dissipation methods, this multi-layer design can ensure more efficient thermal management while maintaining a small volume and light weight.

[0023] (4) By fixedly installing auxiliary conductive pieces at the first connection part, the second connection part, and the electrical connection points of the electrical components respectively, the conductive cross-sectional area of the connection part and the connection points of the electrical components can be significantly increased, and the heat conduction path can also be extended. More heat can be quickly conducted by the first conductive sheet and the second conductive sheet through these auxiliary conductive pieces, and dissipated to the outside through the heat dissipation layer. Such a multi-path conduction method can more effectively reduce the temperature of the electrical connection points of the electrical components.

[0024] (5) By providing the first conductive sheet and the second conductive sheet between the connection parts of the first conductive sheet and the second conductive sheet, this technical solution not only optimizes the electrical connection between the electrical components and the conductive column, increases the current conduction efficiency, and reduces the internal resistance, but also effectively enhances the heat dissipation capacity, controls the temperature rise, and realizes the temperature equalization of the electrical components. Compared with the method of increasing the thickness of the conductive column, the increase in the conductive connection piece can achieve the purpose of optimizing current conduction and heat dissipation without increasing the occupation of vertical space, and at the same time meets the requirements of lightweight design.

[0025] (6) Directly press-form the first pin on the first conductive column, directly press-form the second pin on the second conductive column, and provide a connection seat on the top surface of the upper housing. Both the first pin and the second pin penetrate the top surface of the upper housing vertically upward and are fixed in the connection seat, so that the external high-voltage sampling terminal can be easily inserted into the connection seat, the sampling terminal is electrically connected to the first pin and the second pin, and the high-voltage signal of the relay is obtained. With such a structural design, the acquisition method of the high-voltage sampling model of the relay becomes simple and reliable.

[0026] (7) By providing a first connector and a second connector on the bottom housing, it is ensured that at least one electrical connection end of several electrical components can be stably connected to the bottom housing via the connector, and by adjusting the structural form of some of the first and second connectors, different types of electrical components can be flexibly electrically connected, an assembly connection relationship can be established between electrical components via the first and second connectors, and the electrical components can be flexibly assembled to the battery pack cutting unit.

[0027] To more clearly illustrate embodiments of the present invention or technical concepts in the prior art, the following briefly describes the drawings that may be used in describing embodiments or the prior art. Obviously, the drawings in the following description represent only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these without any creative effort. [Brief explanation of the drawing]

[0028] [Figure 1] Figure 1 is a schematic diagram of the three-dimensional structure of the battery pack cutting unit according to the present invention at a first viewing angle. [Figure 2] Figure 2 is a schematic diagram of the three-dimensional structure of the battery pack cutting unit according to the present invention, viewed from a second perspective. [Figure 3] Figure 3 is a schematic diagram of the internal configuration of the battery pack cutting unit according to the present invention. [Figure 4] Figure 4 shows an explosion diagram of the battery pack cutting unit according to the present invention. [Figure 5] Figure 5 shows a first structural configuration of the electrical connection assembly according to the present invention. [Figure 6] Figure 6 is a schematic front view of a second structural form of the electrical connection assembly according to the present invention. [Figure 7] Figure 7 is a schematic rear view of a second structural form of the electrical connection assembly according to the present invention. [Figure 8] Figure 8 is a magnified view of part A in Figure 4. [Figure 9] Figure 9 is a magnified view of section B in Figure 4. [Figure 10]Figure 10 is a schematic perspective view of the upper housing structure according to the present invention. [Figure 11] Figure 11 is a plan view of the battery pack cutting unit according to the present invention. [Figure 12] Figure 12 is a plan cross-sectional view taken along the line C-C in Figure 11. [Figure 13] Figure 13 is a plan cross-sectional view taken along the line D-D in Figure 11. [Figure 14] Figure 14 is a magnified view of section E in Figure 12. [Modes for carrying out the invention]

[0029] The following describes the technical proposals of embodiments of the present invention clearly and completely, combining the embodiments of the present invention; however, obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative labor based on the embodiments of the present invention are within the scope of the protection of the present invention.

[0030] As shown in Figure 1, combining Figures 2 to 4, an embodiment of the present invention discloses a battery pack cutting unit comprising an electrical component 2 and an electrical connection assembly 3.

[0031] Here, the electrical components 2 are used for the electrical control and protection of the battery pack, and multiple such electrical components 2 are provided. These may be important components such as relays, fuses 25, and contactors. In some embodiments, these electrical components 2 are attached to a battery pack disconnection unit.

[0032] To achieve electrical connections between multiple electrical components 2, the electrical connection assembly 3 comprises multiple first conductive rows 31 and multiple second conductive rows 32. For convenience of distinction, in this embodiment, the first conductive row 31 is defined as the positive electrode conductive row, and correspondingly, the second conductive row 32 is defined as the negative electrode conductive row. In some other embodiments, the polarity of the first conductive row 31 and the second conductive row 32 is interchangeable.

[0033] Since electrical communication is required between multiple electrical components 2, multiple first conductive arrays 31 and multiple second conductive arrays 32 are provided, with the first conductive arrays 31 serving as positive electrode conductive arrays and the second conductive arrays 32 serving as negative electrode conductive arrays. Here, the multiple first conductive arrays 31 are used to achieve electrical communication between some of the electrical components 2 and form a positive electrode circuit, while the multiple second conductive arrays 32 are used to achieve electrical communication between other electrical components 2 and form a negative electrode circuit.

[0034] Of course, in some other embodiments, the polarity of the first conductive row 31 and the second conductive row 32 may be the same, that is, among a plurality of electrical components 2, some electrical components 2 establish one circuit via the first conductive row 31, and other electrical components 2 establish one circuit via the second conductive row 32, and these two circuits have the same polarity.

[0035] The first conductive array 31 comprises a first conductive sheet 310 and a first connecting portion 311 connected to the first conductive sheet 310, and the first conductive array 32 comprises a second conductive sheet 320 and a second connecting portion 321 connected to the second conductive sheet 320. The multiple first conductive sheets 310 are arranged at intervals on the same planar layer, and the multiple second conductive sheets 320 are arranged at intervals on the same planar layer, and the planar layer on which the first conductive sheets 310 are located and the planar layer on which the second conductive sheets 320 are located are laminated together, and the first connecting portion 311 and the second connecting portion 321 are electrically connected to the electrical component 2, respectively.

[0036] In this embodiment, the first conductive sheet 310 and the second conductive sheet 320 are both conductive sheets provided horizontally. These conductive sheets may be metal sheets such as copper sheets, aluminum sheets, or iron sheets, or conductive semiconductor sheets. Preferably, the first conductive sheet 310 and the second conductive sheet 320 in this embodiment are copper plates, which can improve current transmission capability and heat dissipation efficiency. Since some first conductive sheets 310 and some second conductive sheets 320 are located in two different planar layers, the area in which some first conductive sheets 310 and some second conductive sheets 320 are arranged in their respective planar layers can be expanded to a larger extent, and they do not affect each other. By stacking the planar layer in which the first conductive sheet 310 is located and the planar layer in which the second conductive sheet 320 is located, the arrangement of these conductive sheets can be made more compact, and the internal space of the battery pack cutting unit can be effectively utilized.

[0037] It should be noted that in the above-described embodiment, the same planar layer consists of multiple first conductive sheets 310 located at the same planar layer level, multiple second conductive sheets 320 located at the same planar layer level, multiple first conductive sheets 310 having the same height in the same planar layer and being arranged at intervals in the same plane, and multiple second conductive sheets 320 having the same height in the same planar layer and being arranged at intervals in the same plane, thereby resulting in a more compact arrangement of these conductive sheets in the vertical direction.

[0038] It can also be understood that, within the same planar layer, there are multiple first conductive sheets 310 and multiple second conductive sheets 320, each with some height differences within the same planar layer, and these height differences are determined by the assembly process, but the height differences between the conductive sheets within the same planar layer are small, and the characteristic of being compactly arranged in the vertical direction is still satisfied.

[0039] In this embodiment, the arrangement density of the first conductive sheet 310 and the second conductive sheet 320 is greater than that of conventional arrangements where the positive electrode conductive row and the negative electrode conductive row are arranged in the same horizontal direction. This improves the efficiency of space utilization in the battery pack cutting unit and effectively increases the usable area.

[0040] Because the arrangement area of ​​the first conductive sheet 310 and the second conductive sheet 320 is expanded, the thickness of the first conductive sheet 310 and the second conductive sheet 320 can be designed to be thinner. Conventionally, the positive electrode conductive array and the negative electrode conductive array are arranged simultaneously in the same horizontal direction, and the arrangement space is limited, so the area arrangement of the positive electrode conductive array and the negative electrode conductive array is limited, and in order to ensure current flow, their thickness is usually designed to be large, around 2 mm to 3 mm. On the other hand, in this embodiment, by laminating the first conductive sheet 310 and the second conductive sheet 320, their thickness can be reduced, and the design thickness can be set to 0.3 mm to 3 mm. As a result, the overall thickness of the first conductive sheet 310 and the second conductive sheet 320 is reduced, the weight is reduced, the space occupied in the battery pack cutting unit is reduced, and the entire battery pack cutting unit becomes lighter and thinner.

[0041] In this embodiment, the first conductive sheet 310 and the second conductive sheet 320 are located on one side of the electrical component 2 in the vertical direction, and taking the example that the first conductive sheet 310 and the second conductive sheet 320 are located below the electrical component 2, in order to electrically connect the electrical component 2 with the first conductive sheet 310 and the second conductive sheet 320, in this embodiment, the first conductive array 31 is installed to include a first connection part 311 connected to the first conductive sheet 310, and the second conductive array 32 is installed to include a second connection part 321 connected to the second conductive sheet 320, with the first connection part 311 located above the first conductive sheet 310 and the second connection part 321 located above the second conductive sheet 320, and the first connection part 311 and the second connection part 321 are each electrically connected to the electrical component 2.

[0042] In the above embodiment, the first connecting portion 311 and the first conductive sheet 310 are made of the same material, the second connecting portion 321 and the second conductive sheet 320 are made of the same material, and taking the first conductive row 31 as an example, the first conductive row 31 can be formed by welding or other fixing methods between the first connecting portion 311 and the first conductive sheet 310.

[0043] Preferably, the first conductive array 31 comprises an integrally molded first connecting portion 311 and a first conductive sheet 310. Specifically, the first connecting portion 311 can be made to protrude from the first conductive sheet 310 by a pressing process, and the first connecting portion 311 can also be a sheet structure. This allows the first connecting portion 311 and the first conductive sheet 310 to have a vertical connection relationship, so that when the first conductive sheet 310 is on the bottom surface of the electrical component 2, the first connecting portion 311 is electrically connected upward to the electrical connection point of the electrical component 2.

[0044] As an example, in a battery pack cutting unit, multiple electrical components 2 are designed, some of which are electrically connected via first connection points 311, and others via second connection points 321. For example, in two electrical components 2 where a positive electrode circuit needs to be established, two first connection points 311 are provided on one first conductive sheet 310, so that each of the two first connection points 311 is connected to the electrical connection point of the two electrical components 2, thereby establishing communication between the electrical components 2 via a first conductive array 31 through a positive electrode circuit. On the other hand, in two electrical components 2 where a negative electrode circuit needs to be established, two second connection points 321 are provided on one second conductive sheet 320, so that each of the two second connection points 321 is connected to the electrical connection point of the two electrical components 2, thereby establishing communication between the electrical components 2 via a second conductive array 32 through a negative electrode circuit.

[0045] By stacking the planar layer on which the first conductive sheet 310 is located and the planar layer on which the second conductive sheet 320 is located, multiple first conductive sheets 310 are located on one planar layer and multiple second conductive sheets 320 are located on another planar layer, expanding the placement area of ​​these conductive sheets on each planar layer and making their arrangement more compact. With this arrangement, the first conductive sheet 310 and the second conductive sheet 320 do not occupy unnecessary vertical space, and the utilization rate of the internal space of the battery pack cutting unit is effectively improved. At the same time, the first connection part 311 and the second connection part 321 are electrically connected to the electrical components 2, and multiple electrical components 2 and conductive sheets are not arranged intersectingly on the same horizontal plane, making the overall structure of the battery pack cutting unit more compact and lightweight. Compared to conventional arrangements, this design not only saves more internal space but also effectively improves the overall performance of the battery pack and can meet the design needs for high energy density and weight reduction.

[0046] Furthermore, due to the design of the first connection part 311 and the second connection part 321, when current flows through the first connection part 311 and the second connection part 321, the first connection part 311 is directly connected to the first conductive sheet 310 and the second connection part 321 is directly connected to the second conductive sheet 320. As a result, the current flows through the entire first conductive sheet 31 and the second conductive sheet 32, and the current guide area is increased, improving the current load capacity. The increased current guide area helps to improve the current load capacity of the conductive array and connection part, reduces resistance during current passage, and avoids overheating problems caused by excessive current density. In high-power applications, improving the current guide area is of great importance for improving the system's heat dissipation performance and electrical performance, and avoids failures and performance degradation due to overheating.

[0047] In order to secure the electrical component 2, this embodiment further provides an upper housing 1, which is made of an insulating material and can achieve electrical isolation between the electrical component 2 and the electrical connection assembly 3.

[0048] As shown in Figures 4 and 10, the multiple electrical components 2 are fixed to one side of the upper housing 1 at intervals, the first conductive sheet 310 and the second conductive sheet 320 are located on the other side of the upper housing 1, the upper housing has holes 10, and the first connection part 311 and the second connection part 321 are electrically connected to the electrical components 2 through these holes 10, respectively.

[0049] In some embodiments, to make the entire battery pack cutting unit lighter and thinner, multiple electrical components are fixed to one side of the upper housing at horizontal intervals. By arranging the multiple electrical components 2 horizontally on one side of the upper housing 1, assembly is made easier, and the volume of the battery pack cutting unit is prevented from becoming excessively large by stacking the electrical components 2 in the height direction. In addition, the multiple electrical components 2 are arranged at horizontal intervals, facilitating electrical connections between the electrical components 2 by the electrical connection assembly 3.

[0050] By providing holes 10 in the upper housing 1, the first connection portion 311 and the second connection portion 321 each pass through these holes 10 and are electrically connected to the electrical components provided on the surface of the upper housing 10. Of course, in some embodiments, the electrical connection points of the electrical components can also be passed through these holes 10 and electrically connected to the first connection portion 311 or the second connection portion 321, respectively.

[0051] The first conductive sheet 310 and the second conductive sheet 320 are located on the other side of the upper housing 1. In some embodiments, a housing chamber can be provided on the bottom surface of the upper housing 1, and the first conductive sheet 310 and the second conductive sheet 320 are stacked vertically and housed in the aforementioned housing chamber. This serves to protect the electrical connection assembly 3 by limiting its position while preventing its edges from leaking outside the upper housing 1.

[0052] In this embodiment, as a preferred embodiment, the first connection portion 311 and the second connection portion 321 pass through their respective holes 10 and are electrically connected to the electrical components 2. This design, which allows the first connection portion 311 and the second connection portion 321 to pass through the upper housing 1, enables efficient electrical connection between the top and bottom of the upper housing 1, eliminating the need to arrange complex conductive paths on a single horizontal plane. As a result, the electrical components 2 can be rationally arranged within a compact space. Furthermore, it should be noted that the first conductive sheet 310 and the second conductive sheet 320 are laminated on one side of the upper housing 1 away from the electrical components 2, so their arrangement is relatively compact and they do not occupy a large vertical space inside the upper housing 1. In addition, the electrical components 2 are located on the other side of the upper housing 1, and the first connection part 311 and the second connection part 321 penetrate upward through the top surface of the upper housing 1 and, after connecting to the electrical components 2, do not occupy a vertical space inside the upper housing 1. Therefore, the overall thickness of the battery pack cutting unit is basically determined by the total thickness of the electrical components 2 and the upper housing 1, making the entire battery pack cutting unit lighter and thinner.

[0053] High voltage current is passed through both the first conductive array 31 and the second conductive array 32, and the first conductive sheet 310 and the second conductive sheet 320 are stacked vertically. Therefore, electrical isolation is necessary between the first conductive sheet 310 and the second conductive sheet 320. In this embodiment, an insulating layer 4 is provided between the first conductive sheet 310 and the second conductive sheet 320 to prevent short circuits from occurring between the first conductive array 31 and the first conductive array 32.

[0054] In some embodiments, the insulating layer 4 may be an insulating plate, insulating coating, ceramic coating, resin layer, or other material, as long as it can electrically isolate the first conductive sheet 310 and the second conductive sheet 320.

[0055] In addition, in some other embodiments, the insulating layer 4 can be made of a heat-dissipating material such as a ceramic insulating material, thermally conductive silica gel, polyimide (PI) composite material, or epoxy resin. By integrating the heat dissipation and insulating functions into the insulating layer 4, the design can be made more compact, while keeping the thickness and weight low, making the battery pack cutting unit lighter and thinner.

[0056] As shown in Figures 4, 11, 12, 13, and 14, a heat dissipation layer 6 is provided between the first conductive sheet 310 and the second conductive sheet 320, including an upper insulating layer 41 and a lower insulating layer 42, and located between the upper insulating layer 41 and the lower insulating layer 42.

[0057] In some embodiments, the upper insulating layer 41 does not need to be in contact with the first conductive sheet 310, the lower insulating layer 42 does not need to be in contact with the second conductive sheet 320, and both sides of the heat dissipation layer 6 may or may not be in contact with the upper insulating layer 41 and the lower insulating layer 42, for example, the heat released from the first conductive sheet 310 and the second conductive sheet 320 is transferred to the insulating layer 4 via the air, and further transferred from the insulating layer 4 to the heat dissipation layer 6.

[0058] In some preferred embodiments, the upper insulating layer 41 and the lower insulating layer 42 are in contact with the first conductive sheet 310 and the second conductive sheet 320, respectively, so that the positive and negative electrode conductive rows can be effectively separated to avoid short circuits. The upper insulating layer 41 and the lower insulating layer 42 act as insulating barriers, ensuring electrical isolation between the conductive rows and enhancing the electrical safety of the battery pack disconnection unit. The design of the heat dissipation layer 6 enables effective thermal management, effectively releasing the heat generated by the current passing through the conductive rows, preventing the temperature inside the battery pack from becoming too high due to overheating of the electrical components 2, which could affect component performance or cause failures.

[0059] Furthermore, the heat conduction section 61 provided on the edge of the heat dissipation layer 6 guides the heat from the heat dissipation layer 6 to the outside, further enhancing the heat dissipation effect. Since the heat conduction section 61 extends to the outside of the electrical connection assembly 3, it can effectively transfer heat to the external environment, allowing the battery pack disconnection unit to maintain a stable temperature during high-power operation and preventing damage due to localized overheating.

[0060] In the above embodiment, the upper insulating layer 41 and the lower insulating layer 42 can be made of polytetrafluoroethylene (PTFF), polyimide (PI), etc. The heat dissipation layer 6 can be made of aluminum-based heat dissipation sheet, copper-based heat dissipation sheet, graphene, aluminosilicate ceramic sheet, polymer-based thermal conductive material, etc.

[0061] By designing the upper insulating layer 41, the heat dissipation layer 6, and the lower insulating layer 42 to be stacked, this design is not only structurally compact, but also allows for effective use of space and combines heat dissipation and electrical isolation functions. Compared to conventional heat dissipation methods, this multi-layer design ensures more efficient thermal management while maintaining a small volume and light weight.

[0062] It should be noted that the upper insulating layer 41 and the lower insulating layer 42 only indicate their relative positions. In practical use, when the electrical component 2 is located at the top of the upper housing 1, the first conductive sheet 310 and the second conductive sheet 320 are located at the bottom of the upper housing, and consequently, the upper insulating layer 41 is located at the bottom of the second conductive sheet 320. When the electrical component 2 is located at the bottom of the upper housing, the first conductive sheet 310 and the second conductive sheet 320 are located at the top of the upper housing, and consequently, the lower insulating layer 42 is located at the top of the first conductive sheet 310.

[0063] In some other embodiments, the heat dissipation layer 6 may be a liquid cooler plate, and by circulating a cooling medium within the liquid cooler plate, the heat released from the electrical components 2 is transferred to the liquid cooler plate via the conductive array and insulating layer 4, and the heat is removed by the cooling medium within the liquid cooler plate, making this heat dissipation method more efficient.

[0064] During charging and discharging, high current is transmitted to the electrical connection points of the electrical components 2, causing these electrical components 2 to generate heat. The heat is introduced to the first conductive sheet 310 and the second conductive sheet 320 through the first connection point 311 and the second connection point 321, respectively, and then discharged to the outside through the heat dissipation layer 6. However, the heat conduction of the electrical components 2 is limited, and in particular, the electrical connection points of the electrical components 2 generate heat due to the transmission of high current, heat accumulates there, the temperature rises, and this heat needs to be conducted downwards through the first connection point 311 and the second connection point 321. However, the first conductive sheet 310 and the first connection point 311 are integrally molded, and the second conductive sheet 320 and the second connection point 321 are integrally molded, and they are designed to be of the same thickness and are thin, and the cross-sectional area of ​​the passage between the first connection point 311 and the second connection point 321 is small, so the internal resistance increases and the temperature rises rapidly.

[0065] Increasing the thickness of the first conductive row 31 and the second conductive row 32 increases the thickness of the first connection part 311 and the second connection part 321. While increasing the cross-sectional area of ​​the passages in the first connection part 311 and the second connection part 321 can mitigate the problem of temperature rise, this also increases the thickness of the first conductive sheet 310 and the second conductive sheet 320, which increases the amount they occupy in the lead-drop space, which does not meet the lightweight design requirements and may lead to increased manufacturing costs.

[0066] Therefore, this embodiment employs an improved version of the electrical connection assembly 3, as shown in Figures 5 and 12.

[0067] Specifically, auxiliary conductive pieces 33 are fixed to the electrical connection points between the first connection part 311 or the second connection part 321 and the electrical component 2. This significantly increases the conductive cross-sectional area at the connection points of the first connection part 311, the second connection part 321, and the electrical component 2. As a result, the internal resistance when current flows through these parts is directly reduced, and the problem of temperature rise is suppressed.

[0068] The added auxiliary conductive pieces 33 not only increase the conductive cross-sectional area but also widen the heat conduction path. More heat can be rapidly conducted through these auxiliary conductive pieces 33 to the first conductive sheet 310 and the second conductive sheet 320, and further dissipated to the outside through the heat dissipation layer 6. Such a multipath conduction method can more effectively lower the temperature of the electrical connection terminals of the electrical component 2.

[0069] Rather than directly increasing the thickness of the first and second connection sections 311 and 321, the overall thickness of the conductive column structure can be effectively controlled by adding auxiliary conductive pieces 33. This meets the lightweight design requirements while maintaining circuit performance and also reduces manufacturing costs. The addition of the auxiliary conductive pieces 33 is achieved by fixing them to the surfaces of the first and second connection sections 311 and 321, and such a design does not significantly increase the space occupied by the lead column. This method makes more rational use of existing space and makes the overall structure more compact than directly increasing the thickness of the conductive column.

[0070] In the above embodiment, the auxiliary conductive piece 33, the first conductive sheet 31, and the second conductive sheet 32 ​​are made of the same or different materials, but all are made of conductive materials with strong heat dissipation performance. In this embodiment, the auxiliary conductive piece 33 is preferably a copper plate, and the thickness of the auxiliary conductive piece 33 can be selected to a suitable thickness, for example, 0.5 mm to 2 mm, depending on the design requirements. The fixing method for the auxiliary conductive piece 33 and the first connection part 311 and the second connection part 321 can be welding, adhesive, or bolt connection.

[0071] In this invention, other means are also employed to further improve the electrical connection assembly 3 in order to solve the problem of heat dissipation.

[0072] Specifically, as shown in Figures 6, 7, and 13, a first conductive connecting piece 34 is provided in the first conductive array 31 between a first connecting portion 311 which is electrically connected to two electrical components 2, and both ends of the first conductive connecting piece 34 are electrically connected to the electrical components 2. In the second conductive array 32, a second conductive connecting piece 35 is provided between a second connecting portion 321 which is electrically connected to two electrical components 2, and both ends of the second conductive connecting piece 35 are electrically connected to the electrical components 2.

[0073] According to the above technical proposal, by installing the first conductive connecting piece 34 and the second conductive connecting piece 35, the conductive connection area between the electrical component 2 and the first conductive array 31 and the second conductive array 32 can be increased, thereby significantly reducing the internal resistance of the connection part, lowering heat accumulation, and improving current transfer efficiency.

[0074] In some embodiments, the first conductive connector 34 may or may not be in contact with the surface of the first connection portion 311, and the second conductive connector 35 may or may not be in contact with the second connection portion 321. When in contact, the introduction of the conductive connector increases the effective conductive cross-sectional area of ​​the connection portion, reducing the internal resistance when current passes through, and suppressing problems of energy loss and temperature rise due to excessive internal resistance. When not in contact, both ends of the first conductive connector 34 are electrically connected to the electrical component 2, and both ends of the second conductive connector 35 are electrically connected to the electrical component 2, which is equivalent to adding an extra conductive path to the existing connection portion. This effectively improves the conductivity efficiency when current flows through these connection points, reduces contact resistance, and reduces heat accumulation.

[0075] By providing a first conductive connecting piece 34 and a second conductive connecting piece 35 between the connection between the first conductive array 31 and the second conductive array 32, this solution optimizes the electrical connection between the electrical component 2 and the conductive array, increases current conduction efficiency, reduces internal resistance, effectively improves heat dissipation capacity, controls temperature rise, and achieves temperature uniformity of the electrical component 2. Compared to methods that increase the thickness of the conductive array, adding conductive connecting pieces achieves the objective of optimizing current conduction and heat dissipation without increasing the amount occupied in vertical space, and also meets the requirements for lightweight design.

[0076] To meet the high-voltage sampling demand for relay elements, this embodiment incorporates the following technical proposals.

[0077] In some embodiments, the first conductive sheet 310 is provided with at least one vertically positioned first pin 312, the second conductive sheet 320 is provided with at least one vertically positioned second pin 322, and the surface of the upper housing 1 is provided with at least one connection seat 13, and as shown in Figures 5, 10 and 12, the first pin 312 and the second pin 322 are located within the connection seat 13 and are used for connection to a high-voltage sampling terminal.

[0078] According to the above proposed technology, the first pin 312 can be formed by bending the first conductive sheet 310 by pressing, and the second pin 322 can be formed by bending the second conductive sheet 320 by pressing. Both the first pin 312 and the second pin 322 penetrate vertically upward through the surface of the upper housing 1 and are fixed within the connection seat 13. This makes it easy to insert an external high-voltage sampling terminal into the connection seat 13, and the sampling terminal is electrically connected to the first pin 312 and the second pin 322 to acquire the high-voltage signal of the relay. This structural design makes the method for acquiring the high-voltage sampling number of the relay simple and reliable.

[0079] In this embodiment, because the thickness of the first conductive row 31 and the second conductive row 32 is thin, the thickness of the press-formed first pin 312 and the second pin 322 perfectly matches the interface of the sampling terminal, ensuring that no gaps or poor contact occur during insertion. Furthermore, the manufacturing process is simple, there is no need to provide a harness or copper row separately when high-voltage sampling, resulting in a simple manufacturing process and high production and assembly efficiency.

[0080] The electrical component 2 in this embodiment comprises multiple relays, and as shown in Figures 1, 11, and 12, the multiple relays are preferably fixed horizontally on the surface of the upper housing 1. Compared to the conventional vertical mounting method, this design helps to reduce the vertical space occupied by the electrical component 2 in the battery pack cutting unit, effectively reducing the overall volume of the battery pack cutting unit and enabling a lighter and thinner design.

[0081] The relay has two electrical connection points, a positive electrical connection point and a negative electrical connection point, which are used for electrical connection with other electrical components 2. In this embodiment, when the relay is placed horizontally, the electrical connection point P of the relay is located on the side wall, and the side wall having the electrical connection point of the relay is close to the edge of the upper housing 1. Therefore, the arrangement of the electrical components 2 is optimized so that the first connection part 311 and the second connection part 321 can directly and effectively connect to the electrical connection point P of the relay, reducing unnecessary circuit length and connection delay, and improving overall electrical performance.

[0082] As shown in Figures 5, 6, 8, 9, 12, and 13, the first connecting portion 311 includes a first vertical sheet 3111 connected to the first conductive sheet 310. The first vertical sheet 3111 can be connected perpendicularly to the first conductive sheet 310 by welding, and the first conductive sheet 310 can be formed by bending the first vertical sheet 3111 through a press process. Such a manufacturing process is simple, highly efficient, and low-cost. At the same time, the use of a press process ensures that the first conductive sheet 310 and the first vertical sheet 3111 belong to an integrally molded structure, improving structural stability and the robustness of the electrical connection.

[0083] The second connection section 321 includes a second vertical sheet 3211 connected to the second conductive sheet 320. In this embodiment, the method for manufacturing the second vertical sheet 3211 is the same as that for manufacturing the first vertical sheet 3111, and therefore, a detailed explanation is omitted here.

[0084] The configurations of the first connection portion 311 and the second connection portion 321 shown in this embodiment are both formed by a press process, that is, the first conductive sheet 310 and the second conductive sheet 320 are directly pressed and folded, so that the first vertical sheet 3111 and the second vertical sheet 3211 can penetrate the surface of the upper housing 1 at the edge of the upper housing 1, and electrical connection with the electrical connection point P of the relay can be facilitated.

[0085] In this embodiment, the electrical connection points P of some of the relays are electrically connected via the first vertical sheet 3111, and the electrical connection points P of other relays are electrically connected via the second vertical sheet 3211.

[0086] Specifically, the relays include a rapid charging positive relay 21, a rapid charging negative relay 22, a main positive relay 23, and a main negative relay 24. The electrical connection point P of the rapid charging positive relay 21 and the electrical connection point P of the main positive relay 23 are electrically connected via a first vertical sheet 3111, and the electrical connection point P of the rapid charging negative relay 22 and the electrical connection point P of the main negative relay 24 are electrically connected via a second vertical sheet 3211.

[0087] By designing the electrical connections between the rapid charging relay and the main relay as a first vertical sheet 3111 and a second vertical sheet 3211, respectively, more efficient current distribution can be achieved. The rapid charging relay is directly connected to the main positive electrode relay 23 via the first vertical sheet 3111, ensuring stable flow of positive electrode current during rapid charging, while the negative electrode current flows from the rapid charging negative electrode relay 22 to the main negative electrode relay 24 via the second vertical sheet 3211, avoiding current interference and overload.

[0088] This connection configuration enables effective electrical connection between different relays, and by connecting the electrical connection points of different relays with the first vertical plate 3111 and the second vertical plate 3211, more efficient, stable, and safe current distribution and charge management are achieved.

[0089] In the above embodiment, the first vertical sheet 3111 and the second vertical sheet 3211 can penetrate the upper housing 1 and then be quickly connected to the electrical connection points on the relay side wall. In some preferred embodiments, the first vertical sheet 3111 and the second vertical sheet 3211 can be securely fixed and connected via bolts or the electrical connection points P of the relay.

[0090] Furthermore, if the electrical connection points of the electrical component 2 are located on the side wall, a structural configuration in which the first connection portion 311 is connected to the first vertical sheet 3111 and the second connection portion 3211 is connected to the second vertical sheet 3211 allows the first vertical sheet 3111 and the second vertical sheet 3211 to easily penetrate the surface of the upper housing 1, thereby facilitating electrical connection to these electrical connection points with the electrical component 2.

[0091] In this embodiment, preferably, the electrical component 2 is located at the top of the upper housing 1, and the electrical connection assembly 3 is located at the bottom of the upper housing 1. As the electrical connection assembly 3 is located at the bottom of the upper housing 1, the upper housing 1 cannot fully protect the electrical connection assembly 3, and in particular the second conductive sheet 320 is exposed, which leads to the disruption of contact between the second conductive sheet 320 and other electrical components of the battery pack cutting unit. To protect the electrical connection assembly 3, the battery pack cutting unit in this embodiment is further provided with an insulating bottom housing 5, which is located on one side away from the housing of the electrical connection assembly 3. In some embodiments, the bottom housing 5 is fitted into the upper housing 1 and can be fixedly connected to the upper housing 1 by snap-fit ​​connection, bolt connection, adhesive application, etc., thereby housing the electrical connection assembly 3 and insulating heat dissipation material between the upper housing 1 and the bottom housing 5 and providing effective protection.

[0092] In this embodiment, as shown in Figures 3, 4, and 12, the bottom housing 5 is provided with a first conductive sheet 310, a second conductive sheet 320, and multiple first connectors 51 and second connectors 52 that penetrate the upper housing 1 and extend from the top surface of the upper housing 1. Accordingly, the first conductive sheet 310 and the second conductive sheet 320 are both provided with corresponding relief holes at the top and bottom so that these first connectors 51 and second connectors 52 can pass through them, and these relief holes correspond to the holes 10 in the upper housing 1.

[0093] Furthermore, relief holes must be provided in the insulating layer 4 and the heat dissipation layer 6 so that the first connector 51 and the second connector 52 can pass through them.

[0094] By providing the first connector 51 and the second connector 52, it becomes easier to provide the electrical connection points of electrical components 2, such as the fuse 25 and the current sensor 26, in a horizontal direction. Since the electrical connection points of these electrical components 2 can only be electrically connected to the first connection part 311 or the second connection part 321 in a vertical direction, providing the first connector 51 and the second connector 52 makes it easier to position the electrical connection points of these electrical components 2 horizontally on the connectors. On the other hand, these connectors can support and fix the electrical connection points of the electrical components 2. On the other hand, the first connection part 311 and the second connection part 321 can also be positioned on the connectors, and they can be electrically fixedly connected to the electrical connection points of the electrical components 2.

[0095] The installation of the first connector 51 and the second connector 52 allows them to support the first connection part 311 and the second connection part 321, and the electrical connection points of the electrical component 2 are positioned on the first connection part 311 or the second connection part 321, making it easier to lock them in place via the connectors.

[0096] In this embodiment, at least some of the first connection portions 311 further include a first horizontal sheet 3112 that is perpendicularly connected to one end of the first vertical sheet 3111 away from the first conductive sheet, and the first horizontal sheet 3112 is fixedly connected to the top surface of the first connector 51. This setup places the electrical connection points of some electrical components 2 that need to be connected to the positive electrode circuit on the top surface of the first horizontal sheet 3112, and bolts pass through the electrical connection points and the first horizontal sheet 3112 and are fixedly connected to the first connector 51, thereby effectively fixing these electrical components 2 to the top surface of the upper housing 1, and enabling the electrical connection points of these electrical components 2 to establish positive electrode electrical communication with other electrical components 2 via the first connection portion 311 having the first horizontal sheet 3112 and the first vertical sheet 3111.

[0097] Accordingly, at least some of the second connection sections 321 further include a second horizontal sheet 3212 that is perpendicularly connected to one end of the second vertical sheet 3211 away from the second conductive sheet 320, and the second horizontal sheet 3212 is fixedly connected to the top surface of the second connector 52. This arrangement places the electrical connection points of some electrical components 2 that need to be connected to the negative electrode circuit on the top surface of the second horizontal sheet 3212, and bolts pass through the electrical connection points and the second horizontal sheet 3212 and are fixedly connected to the second connector 52, thereby effectively fixing these electrical components 2 to the top surface of the upper housing 1, and allowing the electrical connection points of these electrical components 2 to establish negative electrode electrical connections with other electrical components 2 via the second connection section 321 having the second horizontal sheet 3212 and the second vertical sheet 3211.

[0098] In this embodiment, the opening area of ​​the hole 10 in the upper housing 1 is larger than the projected area of ​​the first horizontal sheet 3112 and the second horizontal sheet 3212 in the vertical direction. As a result, after the first vertical sheet 3111 and the second vertical sheet 3211 pass through these holes 10, the first horizontal sheet 3112 and the second horizontal sheet 3212 are positioned above the upper housing, and there is a gap between the first horizontal sheet 3112 and the second horizontal sheet 3212 and the surface of the upper housing. After the first connector 51 and the second connector 52 pass through these relief holes, the first connector 51 can support the first horizontal sheet 3112 and the second connector 52 can support the second horizontal sheet 3212, and electrical connection points that facilitate the horizontal placement of electrical components 2 are housed on the surface of the first horizontal sheet 3112 or the second horizontal sheet 3212 and can be locked together via bolts.

[0099] In the embodiments of the present invention, not all first connection portions 311 have a first horizontal sheet 3112. When the electrical connection point of an electrical component 2 is on a side wall, for example, in the case of a relay arranged horizontally, the first connection portion 311 connected to these electrical components 2 has only a first vertical sheet 3111, and the first vertical sheet 3111 is directly attached to the electrical connection point on the side wall of the electrical component 2 for electrical connection. The first connection portion 311 has a first vertical sheet 3111 and a first horizontal sheet 3112 as long as the electrical connection point of the electrical component 2 is arranged horizontally and needs to be connected vertically to the first connection portion 311, such as a fuse 25.

[0100] Accordingly, the second connection section 321, like the first connection section 311, does not necessarily include a second horizontal sheet 3212.

[0101] Furthermore, some of the first horizontal sheets 3112 are fixedly connected to the top surface of the first connector 51, and some of the second horizontal sheets 3212 are fixedly connected to the top surface of the second connector 52. As a result, the first horizontal sheets 3112 connecting the rapid charging positive input terminal and the rapid charging positive relay 21 are fixedly connected to the first connector 51, and the second horizontal sheets 3212 connecting the rapid charging negative input terminal and the rapid charging negative relay 22 are fixedly connected to the second connector 52, allowing the rapid charging positive and negative input terminals to access the charging circuit.

[0102] In some embodiments, the electrical component 2 further comprises at least one fuse 25 having a first electrical connection terminal 251 and a second electrical connection terminal 252 that are provided opposite to each other, a first support portion 11 is provided on the top surface of the upper housing 1, the first electrical connection terminal 251 of the fuse 25 is fixed to the first support portion 11, the second electrical connection terminal 251 of the fuse 25 is provided on the top surface of the first horizontal sheet 3112, and the second electrical connection terminal 252 is fixedly connected to the first horizontal sheet 3112 via a first connector 51.

[0103] In the above embodiment, the first electrical connection terminal 251 and the second electrical connection terminal 252 are each formed by copper rows that extend horizontally from both ends of the fuse body 25, and the first electrical connection terminal 251 for connecting the positive terminal of the battery pack or the positive terminal of an electrical appliance is fixed horizontally to the first support part 11.

[0104] In some embodiments, the fuse 25 may consist only of a main fuse. A rapid charging positive electrode circuit is established between the rapid charging positive electrode relay 21, the main positive electrode relay 23, and the main fuse via a first conductive array 31, and a rapid charging negative electrode circuit is established between the rapid charging negative electrode relay 22 and the main negative electrode relay 24 via a second conductive array 32. This connects the rapid charging positive electrode circuit, the battery pack, and the rapid charging negative electrode circuit, forming a complete rapid charging closed circuit.

[0105] In some other embodiments, the fuse 25 may also include at least one auxiliary fuse.

[0106] In the positive electrode discharge circuit, the main fuse and the main positive electrode relay 23 are connected in series by the first conductive array 31, and the main positive electrode relay 23 and at least one auxiliary fuse are connected in parallel by the first conductive array 31, thereby forming the positive electrode discharge circuit of the battery pack. Current flows through this circuit, and the positive electrode current of the battery pack first passes through the main fuse 25a, then through the main positive electrode relay 23, then through the auxiliary fuses (in a parallel path if there are multiple auxiliary fuses), flows back to the positive terminal of the electrical equipment, passes through the negative terminal of the electrical equipment, and finally returns to the negative terminal of the battery pack through the main negative electrode relay 24.

[0107] The second electrical connection terminal 252 of the main fuse establishes an electrical connection between the first connection part 311 and the main positive relay 23 via the first horizontal sheet 3112 and the first vertical sheet 3111, and the first electrical connection terminal 251 of the main fuse is used to connect to the positive terminal of the battery pack. The first electrical connection terminal 251 of the auxiliary fuse is connected to the positive terminal of the electrical equipment via the first support part 11, and the second electrical connection terminal 252 of the auxiliary fuse is electrically connected to the electrical connection point of the distal end of the main relay 23 via the first connection part 311.

[0108] In the above embodiment, if an excessive current occurs during charging or discharging of the battery pack, the main fuse blows due to the excessive current, interrupting the flow of current to prevent overheating or damage to the battery pack, electrical equipment, or relay. By providing an auxiliary fuse, the safety redundancy of the circuit system can be enhanced; that is, in the event of an excessive current, the main fuse does not blow, and the auxiliary fuse interrupts the circuit, thus protecting electrical safety.

[0109] The electrical component 2 further comprises a current sensor 26. The top surface of the upper housing 1 has a second support portion 12. One end of the current sensor 26 is horizontally fixed to the second support portion 12, the other end of the current sensor 26 is horizontally provided on the top surface of the second horizontal sheet 3212, and the end of the current sensor 26 away from the second support portion 12 is fixedly connected to the second horizontal sheet 3212 via a second connector 52. In this embodiment, one end of the current sensor 26 is connected to the negative terminal of the battery pack via the second support portion 12, and the other end of the current sensor 26 is electrically connected to the main negative electrode relay 24 via a second connection portion 321 consisting of the second horizontal sheet 3212 and the second vertical sheet 3211. A negative electrode discharge circuit is formed between the current sensor 26 and the main negative electrode relay 24 via a second conductive array 32, and a rapid charge negative electrode discharge circuit is formed between the rapid charge negative electrode relay 22, the main negative electrode relay 24, and the current sensor 26 via the second conductive array 32. The current sensor 26 is used to detect the charging and discharging current, and if the current becomes overloaded, it activates the fuse 25 to protect the safety of the charging and discharging circuit.

[0110] In the above embodiment, by providing a first connector 51 and a second connector 52 on the bottom housing 5, it is ensured that at least one electrical connection end of some electrical components 2 can be stably connected to the bottom housing 5 via the connectors. Furthermore, by adjusting the configuration of some of the first connection parts 311 and the second connection parts 321, different types of electrical components 2 can be flexibly electrically connected, and an assembly connection relationship is established between the electrical components 2 via the first connection parts 311 and the second connection parts 321, allowing the electrical components 2 to be flexibly assembled to the battery pack cutting unit.

[0111] The foregoing describes only preferred embodiments of the present invention, and any modifications, equivalent substitutions, improvements, etc., made in the spirit and principles of the present invention, without limiting the present invention, should be included within the scope of protection of the present invention. [Explanation of symbols]

[0112] 1...Upper housing, 10...Hole, 11...First support part, 12...Second support part, 13...Connecting seat, 2...Electrical component, 21...Rapid charging positive relay, 22...Rapid charging negative relay, 23...Main positive relay, 24...Main negative relay, P...Electrical connection point, 25...Fuse, 251...First electrical connection terminal, 252...Second electrical connection terminal, 26...Current sensor, 3...Electrical connection assembly, 31...First conductive row, 310...First conductive sheet, 311...First connector, 3111...First vertical sheet, 3112...First horizontal sheet, 312...First pin, 32...Second conductive row, 320...Second conductive sheet, 321...Second connector, 3211...Second vertical sheet, 3212...Second horizontal sheet, 322...Second pin, 33... Auxiliary conductive piece, 34... First conductive connecting piece, 35... Second conductive connecting piece, 4...insulating layer, 41...upper insulating layer, 42...lower insulating layer, 5...Bottom housing, 51...First connector, 52...Second connector, 6...Heat dissipation layer, 61...Heat conduction section

Claims

1. Electrical components (2) and, The device comprises multiple first conductive arrays (31) including a first conductive sheet (310) and a first connecting portion (311) connected to the first conductive sheet (310), and multiple second conductive arrays (32) including a second conductive sheet (320) and a second connecting portion (321) connected to the second conductive sheet (320). A plurality of the first conductive sheets (310) are arranged at intervals in the same planar layer, and a plurality of the second conductive sheets (320) are arranged at intervals in the same planar layer, and the planar layer in which the first conductive sheets (310) are located and the planar layer in which the second conductive sheets (320) are located are laminated together. The present invention comprises an electrical connection assembly (3) in which the first connection portion (311) and the second connection portion (321) are each electrically connected to the electrical component (2), A battery pack cutting unit characterized by the following features.

2. The battery pack cutting unit according to claim 1, further comprising an upper housing (1) having a hole (10), wherein a plurality of the electrical components (2) are provided, the plurality of electrical components (2) are fixed to one side of the upper housing (1) at intervals, the first conductive sheet (310) and the second conductive sheet (320) are located on the other side of the upper housing (1), and the first connecting portion (311) and the second connecting portion (321) are electrically connected to the electrical components (2) via the hole (10), respectively.

3. The battery pack cutting unit according to claim 1, characterized in that an insulating layer (4) is provided between the first conductive sheet (310) and the second conductive sheet (320).

4. The battery pack cutting unit according to claim 3, wherein a heat dissipation layer (6) is further provided between the first conductive sheet (310) and the second conductive sheet (320), the insulating layer (4) includes an upper insulating layer (41) and a lower insulating layer (42), and the heat dissipation layer (6) is located between the upper insulating layer (41) and the lower insulating layer (42).

5. The battery pack cutting unit according to claim 1, characterized in that the thickness of the first conductive sheet (310) and the second conductive sheet (320) are both 0.3 mm to 3 mm.

6. The battery pack cutting unit according to claim 1, characterized in that an auxiliary conductive piece (33) is fixed to the electrical connection between the first connection part (311) or the second connection part (321) and the electrical component (2).

7. In the first conductive array (31), a first conductive connecting piece (34) is provided between the first connecting portion (311) which is electrically connected to the two electrical components (2), and the electrical components (2) are electrically connected to both ends of the first conductive connecting piece (34). The battery pack cutting unit according to claim 1, characterized in that a second conductive connecting piece (35) is provided between the second connecting portion (321) which is electrically connected to two of the electrical components (2) in the second conductive row (32), and the electrical components (2) are electrically connected to both ends of the second conductive connecting piece (35).

8. The battery pack cutting unit according to claim 2, characterized in that the first conductive sheet (310) has at least one vertically provided first pin (312), the second conductive sheet (320) has at least one vertically provided second pin (322), the surface of the upper housing (1) has at least one connection seat (13), and both the first pin (312) and the second pin (322) penetrate the upper housing (1) and are located within the connection seat (13).

9. The battery pack cutting unit according to claim 2, characterized in that the first connection portion (311) includes a first vertical sheet (3111) connected to the first conductive sheet (310), the second connection portion (321) includes a second vertical sheet (3211) connected to the second conductive sheet (320), the electrical component (2) includes a plurality of relays, and when the electrical connection points (P) of the relays are located on the side wall, the first vertical sheet (3111) and the second vertical sheet (3211) are each electrically connected to the electrical connection points (P) of the relays.

10. The electrical connection assembly (3) further comprises a bottom housing (5) provided on one side away from the upper housing (1), the bottom housing (5) being provided with a plurality of first connectors (51) and second connectors (52), both of which penetrate the first conductive sheet (310), the second conductive sheet (320), and the upper housing (1) and extend to the outside of the upper housing (1), At least a portion of the first connection portion (311) further includes a first horizontal sheet (3112) which is perpendicularly connected to one end of the first vertical sheet (3111) away from the first conductive sheet (310), and the first horizontal sheet (3112) is fixedly connected to the end face of the first connector (51). The battery pack cutting unit according to claim 9, wherein at least a portion of the second connection portion (321) further includes a second horizontal sheet (3212) that is perpendicularly connected to one end of the second vertical sheet (3211) away from the second conductive sheet (320), and the second horizontal sheet (3212) is fixedly connected to the end face of the second connector (52).

11. The battery pack cutting unit according to claim 10, wherein the electrical component (2) further comprises at least one fuse (25) having a first electrical connection terminal (251) and a second electrical connection terminal (252) provided opposite to each other, the surface of the upper housing (1) has a first support portion (11), the first electrical connection terminal (251) is fixed to the first support portion (11), the second electrical connection terminal (252) is provided on the top surface of the first horizontal sheet (3112), and the second electrical connection terminal (252) is fixedly connected to the first horizontal sheet (3112) via the first connector (51).

12. The battery pack cutting unit according to claim 10, wherein the electrical component (2) further comprises a current sensor (26), the surface of the upper housing (1) has a second support portion (12), one end of the current sensor (26) is horizontally fixed to the second support portion (12), the other end of the current sensor (26) is horizontally provided on the top surface of the second horizontal sheet (3212), and the end of the current sensor (26) away from the second support portion (12) is fixedly connected to the second horizontal sheet (3212) via the second connector (52).

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