Battery pack circuit breaking unit

Abstract

The invention provides a battery pack circuit breaking unit, and relates to the technical field of batteries, the battery pack circuit breaking unit comprises an electrical element and an electrical connection assembly, the electrical connection assembly comprises a plurality of first conducting bars and a plurality of second conducting bars, each first conducting bar comprises a first conducting strip body and a first connection part which are connected with each other, and each second conducting bar comprises a second conducting strip body and a second connection part which are connected with each other; and the second conducting bar comprises second conducting strip bodies and second connecting parts which are connected with each other, the plurality of first conducting strip bodies and the plurality of second conducting strip bodies are respectively arranged on respective plane layers at intervals, and the first connecting parts and the second connecting parts are respectively and electrically connected with the electrical elements. The plane layer where the first conductive sheet body is located and the plane layer where the second conductive sheet body is located are arranged in a stacked mode, the arrangement area of the conductive sheets on the respective plane layers is expanded, the conductive sheets are connected with the electrical elements through the connecting parts, extra vertical space is prevented from being occupied, the overall layout is more compact, and the cost is reduced. And the light and thin design of the battery pack circuit breaking unit is realized.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack disconnect unit. Background Art

[0002] With the continuous development of high-voltage battery technologies such as electric vehicles and energy storage systems, the battery disconnect unit (BDU) plays a vital role as one of the core components in the battery management system. BDU is mainly used to safely disconnect the battery from the electrical system in the event of a battery failure or emergency to protect the battery from electrical faults such as short circuits and overloads. BDU usually contains electrical components such as relays, fuses, and contactors to achieve control and protection of the battery circuit.

[0003] However, the existing BDU design still has certain technical defects, especially in terms of internal space utilization and volume optimization. Since there are many electrical components integrated inside the BDU, metal conductive bars are usually required to achieve electrical connections between the components. The design and layout of metal conductive bars in the BDU is a key issue. In the traditional BDU design, these electrical components are mostly arranged horizontally, and the metal conductive bars are connected by dividing the positive and negative poles.

[0004] However, the horizontal arrangement layout faces space limitations during design. Due to space limitations, the width of the metal conductive bar is often not wide enough, and its thickness must be increased to ensure current carrying capacity. This design method results in the overall bulkiness of the electrical components inside the BDU after assembly, making it difficult to achieve the goal of thinness. In addition, the narrow width of the metal conductive bar design also limits the optimization space for electrical connections, which may lead to a decrease in electrical performance or poor heat dissipation, thus affecting the safety and reliability of the BDU. Summary of the invention

[0005] In view of this, the present application proposes a battery pack disconnect unit to solve the problem that the design and arrangement of the metal conductive row inside the BDU in the prior art will cause the overall volume of the BDU to be bulky after assembly and cannot be made thin and light.

[0006] The technical solution of this application is implemented as follows:

[0007] The present application provides a battery pack disconnect unit, comprising:

[0008] Electrical components;

[0009] An electrical connection component includes a first conductive row and a second conductive row, wherein a plurality of the first conductive row and a plurality of the second conductive row are provided, wherein the first conductive row includes a first conductive sheet and a first connecting portion connected to the first conductive sheet, and the second conductive row includes a second conductive sheet and a second connecting portion connected to the second conductive sheet, wherein a plurality of the first conductive sheets are arranged at intervals on the same plane layer, and a plurality of the second conductive sheets are arranged at intervals on the same plane layer, and the plane layer where the first conductive sheet is located and the plane layer where the second conductive sheet is located are stacked, and the first connecting portion and the second connecting portion are electrically connected to the electrical element, respectively.

[0010] On the basis of the above technical solution, preferably, it also includes an upper shell, the upper shell has a hole, a plurality of the electrical components are arranged, and the plurality of electrical components are fixedly arranged at intervals on one side of the upper shell, the first conductive sheet and the second conductive sheet are located on the other side of the upper shell, and the first connecting part and the second connecting part are electrically connected to the electrical components through the holes respectively.

[0011] On the basis of the above technical solution, preferably, an insulating layer is provided between the first conductive sheet and the second conductive sheet.

[0012] Based on the above technical solution, preferably, a heat dissipation layer is further provided between the first conductive sheet and the second conductive sheet, the insulating layer comprises 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.

[0013] On the basis of the above technical solution, preferably, the thickness of the first conductive sheet and the second conductive sheet are both 0.3 mm to 3 mm.

[0014] On the basis of the above technical solution, preferably, auxiliary conductive sheets are fixedly provided at the electrical connection points between the first connection part or the second connection part and the electrical element, respectively.

[0015] On the basis of the above technical solution, preferably,

[0016] A first conductive connecting sheet is provided between the first connecting portions on the first conductive bar that are electrically connected to the two electrical components, and both ends of the first conductive connecting sheet are electrically connected to the electrical components respectively;

[0017] A second conductive connecting sheet is disposed between the second connecting portions on the second conductive bar that are electrically connected to the two electrical components, and two ends of the second conductive connecting sheet are electrically connected to the electrical components respectively.

[0018] Based on the above technical solution, preferably, the first conductive sheet has at least one vertically arranged first pin, the second conductive sheet has at least one vertically arranged second pin, the upper shell surface has at least one connecting seat, and the first pin and the second pin both pass through the upper shell and are located in the connecting seat.

[0019] On the basis of the above technical solution, preferably, the first connecting part includes a first vertical sheet connected to the first conductive sheet, the second connecting part includes a second vertical sheet connected to the second conductive sheet, the electrical component includes a plurality of relays, and when the electrical connection point of the relay is located on the side wall, the first vertical sheet and the second vertical sheet are respectively electrically connected to the electrical connection point of the relay.

[0020] On the basis of the above technical solution, preferably, it further includes a bottom shell, the bottom shell is arranged on a side of the electrical connection component away from the upper shell, and a plurality of first connecting columns and second connecting columns are arranged on the bottom shell, and the first connecting columns and the second connecting columns both pass through the first conductive sheet, the second conductive sheet and the upper shell and extend out of the outer side of the upper shell;

[0021] At least a portion of the first connecting portion further includes a first horizontal sheet, the first horizontal sheet is vertically connected to an end of the first vertical sheet away from the first conductive sheet, and the first horizontal sheet is fixedly connected to an end surface of the first connecting column;

[0022] At least a portion of the second connecting portion further includes a second horizontal sheet, the second horizontal sheet is vertically connected to an end of the second vertical sheet away from the second conductive sheet, and the second horizontal sheet is fixedly connected to an end surface of the second connecting column.

[0023] On the basis of the above technical solution, preferably, the electrical component also includes at least one fuse, the fuse having a first electrical connection end and a second electrical connection end relatively arranged, the upper shell surface having a first supporting portion, the first electrical connection end is fixedly arranged on the first supporting portion, the second electrical connection end is arranged on the top surface of the first horizontal sheet body, and the second electrical connection end is fixedly connected to the first horizontal sheet body through the first connecting column.

[0024] On the basis of the above technical solution, preferably, the electrical component also includes a current sensor, the surface of the upper shell has a second supporting portion, one end of the current sensor is horizontally fixed on the second supporting portion, the other end of the current sensor is horizontally arranged on the top surface of the second horizontal sheet body, and the end of the current sensor away from the second supporting portion is fixedly connected to the second horizontal sheet body through the second connecting column.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) By arranging a number of first conductive sheets at intervals on the same plane layer, and arranging a number of second conductive sheets at intervals on the same plane layer, and the plane layer where the first conductive sheets are located and the plane layer where the second conductive sheets are located are stacked, the layout area of ​​these conductive sheets in their respective plane layers is expanded, making their arrangement more compact. Due to this arrangement, the first conductive sheets and the second conductive sheets no longer occupy additional vertical space, which effectively improves the utilization rate of the internal space of the battery pack circuit breaker unit. At the same time, the first connecting portion and the second connecting portion are electrically connected to the electrical component, avoiding the cross-layout of multiple electrical components and conductive rows in the same horizontal direction, thereby making the entire battery pack circuit breaker unit structure more compact and thin. Compared with the traditional arrangement, this design not only saves more internal space, but also effectively improves the overall performance of the battery pack, meeting the design requirements of high energy density and lightweight.

[0027] (2) Since the first conductive sheet and the second conductive sheet are stacked on the side of the upper shell away from the electrical components, they are arranged compactly and do not occupy a large space in the vertical direction inside the upper shell. Meanwhile, the electrical components are located on the other side of the upper shell, and the first connecting portion and the second connecting portion pass through the top surface of the upper shell. After being connected to the electrical components, they do not occupy the internal space of the upper shell in the vertical direction. Therefore, the overall thickness of the entire battery pack circuit breaker unit is basically determined by the total thickness of the electrical components and the upper shell, thereby achieving a lightweight design.

[0028] (3) By stacking the upper insulation layer, the heat dissipation layer, and the lower insulation layer, this design is not only compact in structure but also can effectively utilize space while combining the heat dissipation function with the electrical isolation function. Compared with traditional heat dissipation solutions, this multi-layer design can ensure more efficient thermal management while maintaining a small size and light weight.

[0029] (4) By fixing auxiliary conductive sheets at the electrical connection points between the first connection part and the second connection part and the electrical component, the conductive cross-sectional area at the connection point between the connection part and the electrical component can be significantly increased, and the heat conduction path can also be expanded. More heat can be conducted to the first conductive sheet body and the second conductive sheet body more quickly through these auxiliary conductive sheets, and then dissipated outward through the heat dissipation layer. This multi-path conduction method can more effectively reduce the temperature at the electrical connection point of the electrical component.

[0030] (5) By providing a first conductive connecting sheet and a second conductive connecting sheet between the connecting portions of the first conductive bar and the second conductive bar, this solution not only optimizes the electrical connection between the electrical component and the conductive bar, improves the current transmission efficiency, and reduces the internal resistance, but also effectively improves the heat dissipation capacity, controls the temperature rise, and realizes the temperature uniformization of the electrical component. Compared with the method of increasing the thickness of the conductive bar, adding the conductive connecting sheet can achieve the purpose of optimizing current conduction and heat dissipation without increasing the vertical space occupied, while meeting the lightweight design requirements.

[0031] (6) The first pin is directly formed by stamping on the first conductive bar, the second pin is formed by stamping on the second conductive bar, and a connecting seat is set on the top surface of the upper shell. The first pin and the second pin both vertically pass through the top surface of the upper shell and are fixed in the connecting seat, so that it is convenient to plug the external high-voltage sampling terminal into the connecting seat, and the sampling terminal is electrically connected to the first pin and the second pin to obtain the high-voltage signal of the relay. This structural design makes the high-voltage sampling model acquisition method of the relay simple and reliable.

[0032] (7) By arranging the first connecting column and the second connecting column on the bottom shell, it is ensured that at least one electrical connection end of some electrical components can be stably connected to the bottom shell through the above-mentioned connecting column. At the same time, the structural form of some first connecting parts and second connecting parts is adjusted, so that different types of electrical components can be flexibly electrically connected, and it is convenient to establish an assembly connection relationship between the electrical components through the first connecting part and the second connecting part, so that the electrical components can be flexibly assembled in the battery pack circuit breaker unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the three-dimensional structure of the battery pack disconnecting unit disclosed in the present application from a first perspective;

[0035] Figure 2 A schematic diagram of the third perspective structure of the battery pack disconnecting unit disclosed in the present application;

[0036] Figure 3 A schematic diagram of the internal structure of the battery pack disconnect unit disclosed in this application;

[0037] Figure 4 An exploded view of the battery pack disconnect unit disclosed in this application;

[0038] Figure 5 This is the first structural form of the electrical connection assembly disclosed in this application;

[0039] Figure 6 It is a front schematic diagram of a second structural form of the electrical connection assembly disclosed in the present application;

[0040] Figure 7 It is a schematic back view of a second structural form of the electrical connection assembly disclosed in the present application;

[0041] Figure 8 for Figure 4 A partial enlarged view of the middle part;

[0042] Fig. 9 for Figure 4 A partial enlarged view of point B in the middle;

[0043] Fig.10 It is a schematic diagram of the three-dimensional structure of the upper shell disclosed in this application;

[0044] Fig.11 A top view of the battery pack disconnecting unit disclosed in the present application;

[0045] Fig.12 for Fig.11 Plane section view at CC;

[0046] Fig.13 for Fig.11 Plane section view at DD in the middle;

[0047] Fig.14 for Fig.12 A partial enlarged view of point E in the middle;

[0048] Reference numerals:

[0049] 1. Upper shell; 10. Hole; 11. First support portion; 12. Second support portion; 13. Connecting seat;

[0050] 2. Electrical components; 21. Fast charge positive relay; 22. Fast charge 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;

[0051] 3. Electrical connection assembly; 31. First conductive row; 310. First conductive sheet; 311. First connecting portion; 3111. First vertical sheet; 3112. First horizontal sheet; 312. First pin;

[0052] 32, second conductive row; 320, second conductive sheet; 321, second connecting portion; 3211, second vertical sheet; 3212, second horizontal sheet; 322, second pin;

[0053] 33, auxiliary conductive sheet; 34, first conductive connecting sheet; 35, second conductive connecting sheet; 341, first bending portion; 351, second bending portion;

[0054] 4. Insulation layer; 41. Upper insulation layer; 42. Lower insulation layer;

[0055] 5. bottom shell; 51. first connecting column; 52. second connecting column;

[0056] 6. heat dissipation layer; 61. heat conduction part. DETAILED DESCRIPTION

[0057] The following will be combined with the implementation methods of this application to clearly and completely describe the technical solutions in the implementation methods of this application. Obviously, the described implementation methods are only part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] like Figure 1 As shown, combined Figure 2-4 , an embodiment of the present application discloses a battery pack circuit breaker unit, including an electrical component 2 and an electrical connection assembly 3.

[0059] The electrical components 2 are used for electrical control and protection of the battery pack. Several of these electrical components 2 are provided, and they may be key components such as relays, fuses 25, and contactors. In some embodiments, these electrical components 2 are installed in the battery pack disconnect unit.

[0060] The electrical connection assembly 3 includes a first conductive bar 31 and a second conductive bar 32. A plurality of the first conductive bar 31 and the second conductive bar 32 are provided to establish electrical connection between the plurality of electrical components 2. For the sake of distinction, in this embodiment, the first conductive bar 31 is defined as a positive conductive bar, and correspondingly, the second conductive bar 32 is defined as a negative conductive bar. In some other embodiments, the polarities of the first conductive bar 31 and the second conductive bar 32 can be interchanged.

[0061] Since multiple electrical components 2 need to be electrically connected, multiple first conductive rows 31 and multiple second conductive rows 32 are set. Taking the first conductive row 31 as a positive conductive row and the second conductive row 32 as a negative conductive row as an example, the multiple first conductive rows 31 are used to achieve electrical connection between some electrical components 2 and form a positive circuit, and the multiple second conductive rows 32 are used to achieve electrical connection between another part of the electrical components 2 and form a negative circuit.

[0062] 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 the plurality of electrical components 2, a portion of the electrical components 2 establish a circuit through the first conductive row 31, and another portion of the electrical components 2 establish a circuit through the second conductive row 32, and the two circuits have the same polarity.

[0063] The first conductive row 31 includes a first conductive sheet 310 and a first connecting portion 311 connected to the first conductive sheet 310, and the second conductive row 32 includes a second conductive sheet 320 and a second connecting portion 321 connected to the second conductive sheet 320. A plurality of first conductive sheets 310 are arranged at intervals on the same plane layer, and a plurality of second conductive sheets 320 are arranged at intervals on the same plane layer. The plane layer where the first conductive sheet 310 is located and the plane layer where the second conductive sheet 320 is located are stacked, and the first connecting portion 311 and the second connecting portion 321 are electrically connected to the electrical element 2 respectively.

[0064] In some embodiments, the first conductive sheet 310 and the second conductive sheet 310 are both conductive sheets arranged horizontally, and these conductive sheets can be metal sheets such as copper sheets, aluminum sheets, iron sheets, etc., or they can be semiconductor sheets with conductive properties. Preferably, the first conductive sheet 310 and the first conductive sheet 310 of this embodiment are preferably copper sheets, which can improve the current carrying capacity and heat dissipation efficiency. Since the first conductive sheets 310 and the second conductive sheets 320 are respectively on two different plane layers, the layout areas of the first conductive sheets 310 and the second conductive sheets 320 on their respective plane layers can be further expanded, and they will not be affected by each other. By setting the plane layer where the first conductive sheet 310 is located and the plane layer where the second conductive sheet 320 is located to be stacked, the arrangement of these conductive sheets can be made more compact, and the internal space of the battery pack circuit breaker unit can be effectively utilized.

[0065] It is worth noting that the same plane layer described in the above embodiment is understood as a number of first conductive sheets 310 being located in the same plane level, a number of second conductive sheets 320 being located in the same plane level, a number of first conductive sheets 310 having the same height in the same plane layer, and being arranged at intervals on the same horizontal plane, a number of second conductive sheets 320 having the same height in the same plane layer, and being arranged at intervals on the same horizontal plane, which makes the arrangement of these conductive sheets more compact in the vertical direction.

[0066] The same plane layer can also be understood as a number of first conductive sheets 310 having certain height differences in their plane layer, and a number of second conductive sheets 320 having certain height differences in their plane layer. These height differences are determined by the assembly process, but the height differences between the conductive sheets in the same plane layer are small, and still meet the characteristics of compact arrangement in the vertical direction.

[0067] Compared with the conventional arrangement of the positive electrode conductive row and the negative electrode conductive row in the same horizontal direction, the arrangement of the first conductive sheet 310 and the second conductive sheet 320 in this embodiment is more compact, and the arrangement density is greater than the conventional arrangement density in the same horizontal direction, thereby improving the utilization efficiency of the battery pack circuit breaker unit space and effectively increasing the available area.

[0068] Since 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. In the conventional method of arranging the positive conductive row and the negative conductive row at the same horizontal direction, the arrangement area of ​​the positive conductive row and the negative conductive row is limited due to the limited arrangement space. In order to ensure the overcurrent, their thickness is usually designed to be larger, usually 2-3mm. However, in this embodiment, by stacking the first conductive sheet 310 and the second conductive sheet 320, their thickness can be reduced, and the designed thickness is 0.3mm to 3mm. As a result, after the overall thickness of the first conductive sheet 310 and the second conductive sheet 320 is thinned, the weight becomes lighter, and the space occupied in the battery pack circuit breaker unit is reduced, making the entire battery pack circuit breaker unit thinner.

[0069] In some embodiments, 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. Taking the case where the first conductive sheet 310 and the second conductive sheet 320 are located below the electrical component 2 as an example, in order to achieve electrical connection between the first conductive sheet 310 and the second conductive sheet 320 to establish electrical connection between the electrical component 2, the solution adopted in this embodiment is: the first conductive row 31 is provided with a first connecting portion 311 connected to the first conductive sheet 310, and the second conductive row 32 is provided with a second connecting portion 321 connected to the second conductive sheet 320, the first connecting portion 311 is located above the first conductive sheet 310, and the second connecting portion 321 is located above the second conductive sheet 320, and the first connecting portion 311 and the second connecting portion 321 are electrically connected to the electrical component 2 respectively.

[0070] In some embodiments, the first connection portion 311 and the first conductive sheet 310 are made of the same material, and the second connection portion 321 and the second conductive sheet 320 are made of the same material. Taking the first conductive row 31 as an example, the first connection portion 311 can be welded to the first conductive sheet 310 or other fixing methods to form the first conductive row 31.

[0071] As some embodiments, the first conductive row 31 includes an integrally formed first connecting portion 311 and a first conductive sheet 310. Specifically, a stamping process can be used to realize that the first connecting portion 311 protrudes on the first conductive sheet 310, so that the first connecting portion 311 is also a sheet structure. In this way, the first connecting portion 311 and the first conductive sheet 310 are in a vertical connection relationship. In this way, when the first conductive sheet 310 is on the bottom surface of the electrical component 2, the first connecting portion 311 can be electrically connected to the electrical connection point of the electrical component 2 upward.

[0072] As some examples, in the battery pack disconnecting unit, a plurality of electrical components 2 are designed, a part of the electrical components 2 are electrically connected through the first connecting portion 311, and another part of the electrical components 2 are electrically connected through the second connecting portion 321. For example, in two electrical components 2 that need to establish a positive circuit, two first connecting portions 311 are provided on a first conductive sheet 310, and the two first connecting portions 311 are respectively connected to the electrical connection points on the two electrical components 2, thereby realizing that the electrical components 2 are connected to the positive circuit through the first conductive bar 31. Correspondingly, in two electrical components 2 that need to establish a negative circuit, two second connecting portions 321 are provided on a second conductive sheet 320, and the two second connecting portions 321 are respectively connected to the electrical connection points on the two electrical components 2, thereby realizing that the electrical components 2 are connected to the negative circuit through the second conductive bar 32.

[0073] By setting the plane layer where the first conductive sheet 310 is located and the plane layer where the second conductive sheet 320 is located in a stacked configuration, a number of first conductive sheets 310 are located on one plane layer, and a number of second conductive sheets 320 are located on another plane layer, thereby expanding the layout area of ​​these conductive sheets in their respective plane layers, making their arrangement more compact. Due to this arrangement, the first conductive sheet 310 and the second conductive sheet 320 no longer occupy additional vertical space, effectively improving the utilization rate of the internal space of the battery pack circuit breaker unit. At the same time, the first connecting portion 311 and the second connecting portion 321 are electrically connected to the electrical component 2, avoiding the cross-layout of multiple electrical components 2 and conductive rows on the same horizontal plane, thereby making the entire battery pack circuit breaker unit structure more compact and thin. Compared with the traditional arrangement, this design not only saves more internal space, but also effectively improves the overall performance of the battery pack, meeting the design requirements of high energy density and lightweight.

[0074] In addition, through the design of the first connection part 311 and the second connection part 321, when the current flows through the first connection part 311 and the second connection part 321, since 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, the current will flow through the entire first conductive row 31 and the second conductive row 32, and the conduction area is increased, so that the current carrying capacity is improved. The increased conduction area helps to improve the current carrying capacity of the conductive row and the connection part, reduces the resistance when the current passes, and avoids the heating problem caused by excessive current density. In high-power applications, increasing the conduction area is of great significance to improving the heat dissipation and electrical performance of the system, avoiding failures or performance degradation caused by overheating.

[0075] In order to fix the electrical component 2 , the present embodiment further provides an upper shell 1 , which is made of insulating material and can electrically isolate the electrical component 2 from the electrical connection assembly 3 .

[0076] See attached Figure 4 And attached Fig.10 As shown, a plurality of electrical components 2 are fixedly arranged at intervals on one side of the upper shell 1, a first conductive sheet 310 and a second conductive sheet 320 are located on the other side of the upper shell 1, and the upper shell has holes 10, and the first connecting portion 311 and the second connecting portion 321 are electrically connected to the electrical components 2 through these holes 10 respectively.

[0077] As some embodiments, in order to make the entire battery pack circuit breaker unit thinner and lighter, multiple electrical components are fixedly arranged at intervals in the horizontal direction on one side of the upper shell. By horizontally arranging multiple electrical components 2 on one side of the upper shell 1, assembly is facilitated, while avoiding the electrical components 2 being stacked in the height direction, which would cause the battery pack circuit breaker unit to be bulky. In addition, multiple electrical components 2 are arranged at intervals in the horizontal direction, which facilitates electrical connection between the electrical components 2 through the electrical connection assembly 3.

[0078] By providing the holes 10 on the upper housing 1, the first connection portion 311 and the second connection portion 321 can be conveniently passed through the holes 10 to be 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 the holes 10 to be electrically connected to the first connection portion 311 or the second connection 321 respectively.

[0079] The first conductive sheet 310 and the second conductive sheet 320 are located on the other side of the upper shell 1. In some embodiments, a receiving cavity can be configured on the bottom surface of the upper shell 1. The first conductive sheet 310 and the second conductive sheet 320 are stacked up and down and accommodated in the above-mentioned receiving cavity. In this way, the position of the electrical connection component 3 can be limited, and at the same time, the edge of the electrical connection component 3 can be prevented from leaking out of the outside of the upper shell 1, thereby protecting the electrical connection component 3.

[0080] As some preferred embodiments, the first connection part and the second connection part 321 are respectively passed through these holes 10 to be electrically connected to the electrical component 2. Thus, by designing that the first connection part 311 and the second connection part 321 pass through the upper shell 1, an electrical connection can be effectively established between the top and the bottom of the upper shell 1 without arranging a complex conductive path on a horizontal plane, which enables the electrical component 2 to be reasonably arranged in a relatively compact space. In addition, it is worth noting that since the first conductive sheet 310 and the second conductive sheet 320 are stacked on the side of the upper shell 1 away from the electrical component 2, their arrangement is relatively compact and does not occupy a large space in the vertical direction inside the upper shell 1. At the same time, the electrical component 2 is located on the other side of the upper shell 1, and the first connection part 311 and the second connection part 321 pass through the top surface of the upper shell 1 upwards. After being connected to the electrical component 2, they do not occupy the internal space of the upper shell 1 in the vertical direction, so that the overall thickness of the entire battery pack circuit breaker unit is basically determined by the total thickness of the electrical component 2 and the upper shell 1, thereby achieving a lighter and thinner battery pack circuit breaker unit.

[0081] Since high-voltage current is passed through the first conductive row 31 and the second conductive row 32, and the first conductive sheet 310 and the second conductive sheet 320 are stacked up and down, the first conductive sheet 310 and the second conductive sheet 320 need to be electrically isolated. In this embodiment, an insulating layer 4 is provided between the first conductive sheet 310 and the second conductive sheet 320 to avoid a short circuit between the first conductive row 31 and the second conductive row 32.

[0082] In some embodiments, the insulating layer 4 may be an insulating plate, an insulating coating, a ceramic coating, a resin layer, or the like, as long as the first conductive sheet 310 and the second conductive sheet 320 can be electrically isolated.

[0083] In addition, as some other embodiments, the insulating layer 4 can be made of a material with heat dissipation performance, such as ceramic-based insulating material, thermally conductive silicone, polyimide (PI) composite material, epoxy resin, etc. The heat dissipation function and the insulation function are integrated on the insulating layer 4, so that the design can be more compact while maintaining a low thickness and weight, making the battery pack circuit breaker unit thinner and lighter.

[0084] See attached Figure 4 , 11 As shown in FIGS. 12 , 13 and 14 , 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 .

[0085] As some embodiments, the upper insulating layer 41 may not be in contact with the first conductive sheet 310, and the lower insulating layer 42 may not be in contact with the second conductive sheet 320. At the same time, the two 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. It is only necessary to ensure electrical isolation and heat conduction. For example, the heat released by the first conductive sheet 310 and the second conductive sheet 320 can be transferred to the insulating layer 4 through the air, and then transferred to the heat dissipation layer 6 by the insulating layer 4.

[0086] 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, which can effectively isolate the positive and negative conductive bars to avoid short circuits. The upper insulating layer 41 and the lower insulating layer 42 act as insulating barriers to ensure electrical isolation between the conductive bars and enhance the electrical safety of the battery pack circuit breaker unit. The design of the heat dissipation layer 6 achieves effective heat management, which can effectively dissipate the heat generated by the current passing through the conductive bars, avoiding the internal temperature of the battery pack being too high due to overheating of the electrical component 2, thereby affecting the performance of the component or causing failure.

[0087] In addition, the heat conducting portion 61 provided at the edge of the heat dissipation layer 6 can conduct the heat of the heat dissipation layer 6 to the outside, further enhancing the heat dissipation effect. Since the heat conducting portion 61 extends out of the outside of the electrical connection assembly 3, it can effectively transfer heat to the external environment, ensuring that the battery pack disconnecting unit maintains a stable temperature when working at high power, and preventing damage caused by local overheating.

[0088] 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 sink, copper-based heat sink, graphene, green silicate ceramic sheet, polymer-based thermal conductive material, etc.

[0089] By stacking the upper insulating layer 41, the heat dissipation layer 6 and the lower insulating layer 42, this design is not only compact in structure, but also can effectively utilize space, while combining the heat dissipation function with the electrical isolation function. Compared with traditional heat dissipation solutions, this multi-layer design can ensure more efficient thermal management while maintaining a small size and light weight.

[0090] It is worth noting that the upper insulating layer 41 and the lower insulating layer 42 only represent the distinction of positional relationship. In actual application scenarios, when the electrical component 2 is located at the top of the upper shell 1, the first conductive sheet 310 and the second conductive sheet 320 are located at the bottom of the upper shell. In this way, 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 shell, the first conductive sheet 310 and the second conductive sheet 320 are located at the top of the upper shell. In this way, the lower insulating layer 42 is located at the top of the first conductive sheet 310.

[0091] In some other embodiments, the heat dissipation layer 6 can be a liquid cooling plate. By circulating a cooling medium into the liquid cooling plate, the heat released by the electrical component 2 can be transferred to the liquid cooling plate through the conductive row and the insulating layer 4, and the heat is taken away by the cooling medium in the liquid cooling plate. This heat dissipation method is more efficient.

[0092] During the charging and discharging process, high current will be transmitted at the electrical connection of the electrical component 2, thereby causing these electrical components 2 to generate heat. Although the heat can be introduced into the first conductive sheet 310 and the second conductive sheet 320 through the electrical connection of the electrical component 2 via the first connection part 311 and the second connection part 321, respectively, and then conducted outwardly by the heat dissipation layer 6, the heat conduction of the electrical component 2 is still limited, especially at the electrical connection of the electrical component 2, which generates heat due to the transmission of high current, and the heat accumulates there, and the temperature is relatively high. The heat there needs to be conducted downward through the first connection part 311 and the second connection part 321. Since the first conductive sheet 310 and the first connection part 311 are integrally formed, and the second conductive sheet 320 and the second connection part 321 are integrally formed, they are designed to be of equal thickness, and their thickness is relatively thin. The first connection part 311 and the second connection part 321 have a small cross-sectional area for current flow, which increases the internal resistance and intensifies the temperature rise.

[0093] If the thickness of the first conductive row 31 and the second conductive row 32 is increased, the thickness of the first connecting portion 311 and the second connecting portion 321 will also increase. Although the cross-sectional area of ​​the current flow of the first connecting portion 311 and the second connecting portion 321 becomes larger, which can alleviate the temperature rise problem, the thickness of the first conductive sheet 310 and the second conductive sheet 320 will also increase, which will cause a large vertical space to be occupied, which does not meet the lightweight design requirements and will also cause high manufacturing costs.

[0094] For this purpose, refer to the attached Figure 5 And attached Fig.12 As shown, the solution adopted in this embodiment is to further improve the electrical connection component 3.

[0095] Specifically, the electrical connection between the first connection part 311 or the second connection part 321 and the electrical element 2 is respectively fixedly provided with an auxiliary conductive sheet 33. With this arrangement, the conductive cross-sectional area of ​​the connection between the first connection part 311, the second connection part 321 and the electrical element 2 can be significantly increased. This directly reduces the internal resistance when the current passes through these parts, thereby reducing the temperature rise problem.

[0096] The added auxiliary conductive sheet 33 can not only increase the conductive cross-sectional area, but also expand the heat conduction path. More heat can be conducted to the first conductive sheet 310 and the second conductive sheet 320 more quickly through these auxiliary conductive sheets 33, and then dissipated outward through the heat dissipation layer 6. This multi-path conduction method can more effectively reduce the temperature of the electrical connection end of the electrical component 2.

[0097] By adding an auxiliary conductive sheet 33 instead of directly increasing the thickness of the first connection part 311 and the second connection part 321, the overall thickness of the conductive row structure can be effectively controlled. This meets the requirements of lightweight design while maintaining circuit performance and reduces manufacturing costs. The addition of the auxiliary conductive sheet 33 is achieved by fixing it on the surface of the first connection part 311 and the second connection part 321. This design method will not significantly increase the vertical space occupied. Compared with directly increasing the thickness of the conductive row, this method makes more reasonable use of the existing space and makes the overall structure more compact.

[0098] In the above embodiment, the auxiliary conductive sheet 33 and the first conductive row 31 and the second conductive row 32 are made of the same or different materials, and all are made of conductive materials with strong heat dissipation performance. In this embodiment, the auxiliary conductive sheet 33 is preferably a copper sheet, and the thickness of the auxiliary conductive sheet 33 can be selected according to design requirements, such as 0.5mm-2mm. In addition, the auxiliary conductive sheet 33 and the first connecting portion 311 and the second connecting portion 321 can be fixed by welding, bonding or bolting.

[0099] The present application also adopts some other means to further improve the electrical connection assembly 3 to solve the heat dissipation problem.

[0100] For details, please refer to the attached Figure 6 Attached Figure 7 And attached Fig.13 As shown, a first conductive connecting sheet 34 is arranged between the first connecting portions 311 on the first conductive row 31 that are electrically connected to the two electrical components 2, and the two ends of the first conductive connecting sheet 34 are respectively electrically connected to the electrical components 2; a second conductive connecting sheet 35 is arranged between the second connecting portions 321 on the second conductive row 32 that are electrically connected to the two electrical components 2, and the two ends of the second conductive connecting sheet 35 are respectively electrically connected to the electrical components 2.

[0101] The above technical solution is adopted to increase the conductive connection area between the electrical component 2 and the first conductive row 31 and the second conductive row 32 by setting the first conductive connecting plate 34 and the second conductive connecting plate 35, which can significantly reduce the internal resistance of the connection part, reduce heat accumulation, and improve the current transmission efficiency.

[0102] As some embodiments, the first conductive connecting piece 34 is in contact or not in contact with the surface of the first connecting portion 311, and the second conductive connecting piece 35 is in contact or not in contact with the second connecting portion 321. When in contact, due to the introduction of the conductive connecting piece, the effective conductive cross-sectional area of ​​the connecting portion is increased, reducing the internal resistance when the current passes through, thereby reducing the energy loss and temperature rise caused by excessive internal resistance. When not in contact, the two ends of the first conductive connecting piece 34 are electrically connected to the electrical component 2 respectively, and the two ends of the second conductive connecting piece 35 are electrically connected to the electrical component 2 respectively.

[0103] This is equivalent to adding an additional conductive path on the basis of the original connection. This can effectively improve the conduction efficiency of current passing through these connection points, reduce contact resistance, and reduce heat accumulation.

[0104] By providing the first conductive connecting sheet 34 and the second conductive connecting sheet 35 between the connecting parts of the first conductive bar 31 and the second conductive bar 32, this solution not only optimizes the electrical connection between the electrical component 2 and the conductive bar, improves the current transmission efficiency, and reduces the internal resistance, but also effectively improves the heat dissipation capacity, controls the temperature rise, and realizes the temperature uniformization of the electrical component 2. Compared with the method of increasing the thickness of the conductive bar, adding the conductive connecting sheet can achieve the purpose of optimizing current conduction and heat dissipation without increasing the vertical space occupied, while meeting the lightweight design requirements.

[0105] In order to meet the high-voltage sampling requirements of relay elements, this embodiment introduces the following technical solutions.

[0106] As some embodiments, the first conductive sheet 310 has at least one vertically arranged first pin 312, the second conductive sheet 320 has at least one vertically arranged second pin 322, and the surface of the upper housing 1 has at least one connecting seat 13, see the attached Figure 5 , Attachment Fig.10 And attached Fig.12 As shown, the first pin 312 and the second pin 322 are located in the connection socket 13 and are used to connect to the high voltage sampling terminal.

[0107] By adopting the above technical solution, the first pin 312 can be formed by stamping and bending on the first conductive sheet 310, and the second pin 322 can be formed by stamping and bending on the second conductive sheet 320. The first pin 312 and the second pin 322 both vertically pass through the surface of the upper shell 1 and are fixed in the connecting seat 13, so as to facilitate the external high-voltage sampling terminal to be plugged into the connecting seat 13, so that the sampling terminal can obtain the high-voltage signal of the relay by electrically connecting with the first pin 312 and the second pin 322. This structural design makes the high-voltage sampling model acquisition method of the relay simple and reliable.

[0108] In this embodiment, since the first conductive row 31 and the second conductive row 32 are relatively thin, the thickness of the first pin 312 and the second pin 322 formed by stamping completely matches the sampling terminal interface, ensuring that there will be no gap or poor contact during insertion. At the same time, the manufacturing process is simple, and there is no need to set up a separate wiring harness or copper busbar during high-voltage sampling. The process is simple and the production and assembly efficiency is high.

[0109] The electrical component 2 of this embodiment includes a plurality of relays. Figure 1 , Attachment Fig.11 And attached Fig.12 As shown, preferably, a plurality of relays are fixedly arranged in a flat position on the surface of the upper shell 1. Compared with the traditional vertical installation method, this design helps to reduce the space occupied by the electrical components 2 in the vertical direction of the battery pack circuit breaker unit, and can effectively reduce the overall volume of the battery pack circuit breaker unit to achieve a lightweight design.

[0110] The relay has two electrical connection points, namely, a positive electrical connection point and a negative electrical connection point, for electrically connecting to other electrical components 2. In this embodiment, when the relay is in a flat arrangement, the electrical connection point P of the relay is located on the side wall, and the side wall of the relay having the electrical connection point is close to the edge of the upper housing 1, thereby optimizing the arrangement of the electrical components 2, so that the first connection portion 311 and the second connection portion 321 can be directly and effectively connected to the electrical connection point P of the relay, reducing unnecessary line length and connection delay, and improving the overall electrical performance.

[0111] See attached Figure 5 , 6 As shown in Figures 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 vertically connected to the first conductive sheet 310 by welding, or the first conductive sheet 310 can be bent by a stamping process to form the first vertical sheet 3111. Such a manufacturing process is simple, efficient and low-cost. At the same time, the stamping process can ensure that the first conductive sheet 310 and the first vertical sheet 3111 are an integrated structure, thereby improving the structural stability and the firmness of the electrical connection.

[0112] The second connection portion 321 includes a second vertical sheet 3211 connected to the second conductive sheet 320 . In the present embodiment, the second vertical sheet 3211 is manufactured in the same manner as the first vertical sheet 3111 , which will not be described in detail herein.

[0113] The structures of the first connecting portion 311 and the second connecting portion 321 shown in this embodiment are both formed by a stamping process, that is, they are directly formed by stamping and bending the first conductive sheet 310 and the second conductive sheet 320. In this way, the first vertical sheet 3111 and the second vertical sheet 3211 can pass through the surface of the upper shell 1 at the edge of the upper shell 1, thereby facilitating electrical connection with the electrical connection point P of the relay.

[0114] In this embodiment, among the plurality of relays, the electrical connection points P of a portion of the relays are electrically connected through the first vertical sheet 3111 , and the electrical connection points P of another portion of the relays are electrically connected through the second vertical sheet 3211 .

[0115] Specifically, the multiple relays include a fast charging positive relay 21, a fast charging negative relay 22, a main positive relay 23 and a main negative relay 24. The electrical connection point P of the fast charging positive relay 21 and the electrical connection point P of the main positive relay 23 are electrically connected through a first vertical sheet 3111, and the electrical connection point P of the fast charging negative relay 22 and the electrical connection point P of the main negative relay 24 are electrically connected through a second vertical sheet 3211.

[0116] By designing the electrical connection between the fast charge relay and the main relay as the first vertical sheet 3111 and the second vertical sheet 3211, respectively, more efficient current distribution can be achieved. The fast charge relay is directly connected to the main positive relay 23 through the first vertical sheet 3111 to ensure the stable flow of positive current during fast charging; similarly, the negative current passes from the fast charge negative relay 22 to the main negative relay 24 through the second vertical sheet 3211, avoiding current interference or overload.

[0117] This connection method can achieve effective electrical connection between different relays. By connecting the electrical connection points of different relays through the first vertical sheet 3111 and the second vertical sheet 3211, more efficient, stable and safe current distribution and charging management can be achieved.

[0118] In the above embodiment, after the first vertical sheet 3111 and the second vertical sheet 3211 pass through the upper shell 1, they can be quickly connected to the electrical connection point on the side wall of the relay. In some preferred embodiments, the first vertical sheet 3111 and the second vertical sheet 3211 can be reliably fixedly connected to the electrical connection point P of the relay through bolts.

[0119] It should be noted that when the electrical connection points of the electrical components 2 are arranged on the side walls, the first connecting part 311 can be arranged as a first vertical sheet 3111, and the second connecting part 321 can be arranged as a second vertical sheet 3211. This makes it convenient for the first vertical sheet 3111 and the second vertical sheet 3211 to pass through the surface of the upper shell 1, thereby easily achieving electrical connection with the electrical connection points of these electrical components 2.

[0120] In the present embodiment, preferably, the electrical component 2 is located at the top of the upper shell 1, and the electrical connection component 3 is located at the bottom of the upper shell 1. Since the electrical connection component 3 is located at the bottom of the upper shell 1, the upper shell 1 cannot fully protect the electrical connection component 3, especially the second conductive sheet 320, which is in a naked state, which will cause the second conductive sheet 320 and other electrical components of the battery pack circuit breaker unit to contact and break. In order to protect the electrical connection component 3, the battery pack circuit breaker unit of the present embodiment is also provided with a bottom shell 5 of insulating material. The bottom shell 5 is arranged on the side of the electrical connection component 3 away from the shell. In some embodiments, the bottom shell 5 can be embedded in the upper shell 1 and fixedly connected to the upper shell 1 by snap connection, bolt connection, gluing, etc., so that the electrical connection component 3 and the insulating heat sink are received between the upper shell 1 and the bottom shell 5, thereby effectively protecting them.

[0121] In this embodiment, refer to the attached Figure 3 , 4 As shown in , and 12, a plurality of first connecting posts 51 and second connecting posts 52 are provided on the bottom shell 5, and the first connecting posts 51 and the second connecting posts 52 all pass through the first conductive sheet 310, the second conductive sheet 320 and the upper shell 1 and extend out of the top surface of the upper shell 1. Accordingly, corresponding upper and lower avoidance holes are provided on the first conductive sheet 310 and the second conductive sheet 320, and these avoidance holes correspond to the holes 10 of the upper shell 1, so as to allow these first connecting posts 51 and the second connecting posts 52 to pass through.

[0122] In addition, the insulating layer 4 and the heat dissipation layer 6 also need to be provided with avoidance holes for the first connecting pillars 51 and the second connecting pillars 52 to pass through.

[0123] By providing the first connecting column 51 and the second connecting column 52, it is convenient for some electrical components 2 to be arranged in a horizontal direction, such as the fuse 25 and the current sensor 26. The electrical connection points of these electrical components 2 can only be electrically connected to the first connecting portion 311 or the second connecting portion 321 in the vertical direction. Therefore, by providing the first connecting column 51 and the second connecting column 52, it is convenient to place the electrical connection points of these electrical components 2 horizontally on the connecting columns. On the one hand, these connecting columns can support and fix the electrical connection points of the electrical components 2. On the other hand, the first connecting portion 311 and the second connecting portion 321 can also be placed on the connecting columns to achieve electrical fixed connection with the electrical connection points of the above-mentioned electrical components 2.

[0124] The first connecting column 51 and the second connecting column 52 can support the first connecting portion 311 and the second connecting portion 321, so that the electrical connection point of the electrical component 2 can be placed on the first connecting portion 311 or the second connecting portion 321 and locked and fixed by the connecting column.

[0125] In this embodiment, at least a portion of the first connection portion 311 also includes a first horizontal sheet 3112, the first horizontal sheet 3112 is vertically connected to an 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 connection column 51. With this arrangement, the electrical connection points of some electrical components 2 that need to be connected to the positive circuit can be placed on the top surface of the first horizontal sheet 3112, and bolts are passed through the electrical connection points, the first horizontal sheet 3112, and fixedly connected to the first connection column 51, so that these electrical components 2 can be effectively fixed on the top surface of the upper shell 1, and the electrical connection points of these electrical components 2 can establish positive electrical communication with other electrical components 2 through the first connection portion 311 with the first horizontal sheet 3112 and the first vertical sheet 3111.

[0126] Correspondingly, at least a portion of the second connection portion 321 also includes a second horizontal sheet 3212, the second horizontal sheet 3212 is vertically connected to an 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 connection column 52. With this arrangement, the electrical connection points of some electrical components 2 that need to be connected to the negative circuit can be placed on the top surface of the second horizontal sheet 3212, and bolts are passed through the electrical connection points, the second horizontal sheet 3212, and fixedly connected to the second connection column 52, so that these electrical components 2 can be effectively fixed on the top surface of the upper shell 1, and the electrical connection points of these electrical components 2 can establish negative electrical communication with other electrical components 2 through the second connection portion 321 with the second horizontal sheet 3212 and the second vertical sheet 3211.

[0127] In this embodiment, the opening area of ​​the hole 10 on the upper shell 1 is larger than the projection area of ​​the first horizontal sheet 3112 and the second horizontal sheet 3212 in the vertical direction. Therefore, after the first vertical sheet 3111 and the second vertical sheet 3211 pass through these holes 10 respectively, the first horizontal sheet 3112 and the second horizontal sheet 3212 are located above the upper shell, and the first horizontal sheet 3112 and the second horizontal sheet 3212 are spaced apart from the surface of the upper shell. After the first connecting column 51 and the second connecting column 52 pass through these avoidance holes, the first connecting column 51 can support the first horizontal sheet 3112, and the second connecting column 52 can support the second horizontal sheet 3212, so that the horizontally arranged electrical connection points of the electrical components 2 can fall on the surface of the first horizontal sheet 3112 or the second horizontal sheet 3212, and be locked and connected by bolts.

[0128] It should be noted that, in the embodiment of the present application, not all first connection parts 311 have the first horizontal sheet 3112. When the electrical connection point of the electrical component 2 is on the side wall, such as a relay arranged flat, the first connection part 311 connected to these electrical components 2 only has the first vertical sheet 3111, and the first vertical sheet 3111 is directly attached to the electrical connection point of the side wall of the electrical component 2 and electrically connected. Only when the electrical connection point of the electrical component 2 is in a horizontal setting and needs to be connected to the first connection part 311 in the vertical direction, such as a fuse 25, the first connection part 311 has the first vertical sheet 3111 and the first horizontal sheet 3112.

[0129] Correspondingly, not all second connection parts 321 are provided with the second horizontal sheet 3212 , and the configuration thereof is similar to that of the first connection part 311 .

[0130] In addition, a portion of the first horizontal sheet 3112 is fixedly connected to the top surface of the first connecting column 51, and a portion of the second horizontal sheet 3212 is fixedly connected to the top surface of the second connecting column 52. The first horizontal sheet 3112 connected to the fast charging positive input terminal and the fast charging positive relay 21 can be conveniently fixedly connected through the first connecting column 51, and the second horizontal sheet 3212 connected to the fast charging negative input terminal and the fast charging negative relay 22 can be fixedly connected through the second connecting column 52, thereby realizing the connection of the fast charging positive and negative input terminals to the charging circuit.

[0131] In some embodiments, the electrical component 2 also includes at least one fuse 25, the fuse 25 has a first electrical connection end 251 and a second electrical connection end 252 that are relatively arranged, the top surface of the upper shell 1 has a first support portion 11, the first electrical connection end 251 of the fuse 25 is fixedly arranged on the first support portion 11, the second electrical connection end 251 of the fuse 25 is arranged on the top surface of the first horizontal sheet 3112, and the second electrical connection end 252 is fixedly connected to the first horizontal sheet 3112 through the first connecting column 51.

[0132] In the above embodiment, the first electrical connection terminal 251 and the second electrical connection terminal 252 are respectively formed by copper bars extending horizontally from both ends of the fuse body 25. The first electrical connection terminal 251 is horizontally fixed on the first support portion 11, and the first electrical connection terminal 251 is used to connect the positive terminal of the battery pack or the positive terminal of the electrical appliance.

[0133] In some embodiments, the fuse 25 may only include a main fuse, and a fast charging positive circuit is established between the fast charging positive relay 21, the main positive relay 23 and the main fuse through the first conductive bus 31, and a fast charging negative circuit is established between the fast charging negative relay 22 and the main negative relay 24 through the second conductive bus 32, thereby connecting the fast charging positive circuit, the battery pack and the fast charging negative circuit to form a complete fast charging closed circuit.

[0134] In some other embodiments, the fuse 25 may further include at least one auxiliary fuse.

[0135] In the positive discharge circuit, the main fuse and the main positive relay 23 are connected in series through the first conductive bar 31, and the main positive relay 23 and at least one auxiliary fuse are connected in parallel through the first conductive bar 31, thereby forming a positive discharge circuit of the battery pack. The current flows through this circuit. The positive current of the battery pack first passes through the main fuse 25a, then flows through the main positive relay 23, and then passes through the auxiliary fuse (if there are multiple auxiliary fuses, they follow a parallel path), and then flows to the positive end of the electrical equipment, passes through the negative end of the electrical equipment, and finally flows back to the negative end of the battery pack through the main negative relay 24.

[0136] The second electrical connection end 252 of the main fuse is electrically connected to the main positive relay 23 through the first horizontal sheet 3112 and the first vertical sheet 3111 to form the first connection part 311. The first electrical connection end 251 of the main fuse is used to connect to the positive terminal of the battery pack. The first electrical connection end 251 of the auxiliary fuse is connected to the positive terminal of the electrical device through the first support part 11, and the second electrical connection end 252 of the auxiliary fuse is electrically connected to the electrical connection point at the far end of the main positive relay 23 through the first connection part 311.

[0137] In the above embodiment, during the charging or discharging process of the battery pack, if an excessive current occurs, the main fuse will melt due to the excessive current, cutting off the current flow to prevent the battery pack, electrical equipment or relay from overheating or damage. By setting an auxiliary fuse, the safety redundancy of the circuit system can be enhanced, that is, when the current is too high, the main fuse is not disconnected, and the circuit can be disconnected by the auxiliary fuse, thereby protecting electrical safety.

[0138] The electrical component 2 also includes a current sensor 26. The top surface of the upper shell 1 has a second support portion 12. One end of the current sensor 26 is horizontally fixed on the second support portion 12. The other end of the current sensor 26 is horizontally arranged 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 through the second connecting column 52. In this embodiment, one end of the current sensor 26 is connected to the negative terminal of the battery pack through the second support portion 12, and the other end of the current sensor 26 is electrically connected to the main negative relay 24 through the second connecting portion 321 formed by the second horizontal sheet 3212 and the second vertical sheet 3211. A negative discharge circuit is formed between the current sensor 26 and the main negative relay 24 through the second conductive bar 32, and a fast charge negative discharge circuit is formed between the fast charge negative relay 22, the main negative relay 24 and the current sensor 26 through the second conductive bar 32. The current sensor 26 is used to detect the charge and discharge current. When the current is overloaded, the fuse 25 can be activated to protect the safety of the charge and discharge circuit.

[0139] In the above embodiment, by arranging the first connecting column 51 and the second connecting column 52 on the bottom shell 5, it is ensured that at least one electrical connection end of some electrical components 2 can be stably connected to the bottom shell 5 through the above connecting column, and at the same time, the structural form of some first connecting parts 311 and the second connecting parts 321 is adjusted, so that different types of electrical components 2 can be flexibly electrically connected, and it is convenient to establish an assembly connection relationship between the electrical components 2 through the first connecting part 311 and the second connecting part 321, so that the electrical components 2 can be flexibly assembled in the battery pack circuit breaker unit.

[0140] The above description is only a preferred implementation mode of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery pack disconnect unit, characterized in that: include: Electrical components (2); An electrical connection component (3) comprises a first conductive bar (31) and a second conductive bar (32), wherein a plurality of the first conductive bar (31) and a plurality of the second conductive bar (32) are provided, wherein the first conductive bar (31) comprises a first conductive sheet (310) and a first connection portion (311) connected to the first conductive sheet (310), and the second conductive bar (32) comprises a second conductive sheet (320) and a second connection portion (321) connected to the second conductive sheet (320), wherein a plurality of the first conductive sheets (310) are arranged at intervals on the same plane layer, and a plurality of the second conductive sheets (320) are arranged at intervals on the same plane layer, and the plane layer where the first conductive sheet (310) is located and the plane layer where the second conductive sheet (320) is located are stacked, and the first connection portion (311) and the second connection portion (321) are respectively electrically connected to the electrical element (2).

2. The battery pack disconnect unit according to claim 1, wherein: The invention also comprises an upper shell (1), the upper shell having a hole (10), a plurality of the electrical components (2) being arranged, the plurality of the electrical components (2) being arranged fixedly and spaced apart on one side of the upper shell (1), the first conductive sheet (310) and the second conductive sheet (320) being located on the other side of the upper shell (1), and the first connecting portion (311) and the second connecting portion (321) being electrically connected to the electrical components (2) respectively through the hole (10).

3. The battery pack disconnect unit according to claim 1, wherein: An insulating layer (4) is provided between the first conductive sheet (310) and the second conductive sheet (320).

4. The battery pack disconnect 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) comprises 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 disconnect unit according to claim 1, wherein: 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 disconnect unit according to claim 1, wherein: An auxiliary conductive sheet (33) is fixedly provided at the electrical connection point between the first connecting portion (311) or the second connecting portion (321) and the electrical element (2).

7. The battery pack disconnect unit according to claim 1, wherein: A first conductive connecting sheet (34) is provided between the first connecting portions (311) on the first conductive row (31) that are electrically connected to the two electrical components (2), and two ends of the first conductive connecting sheet (34) are electrically connected to the electrical components (2) respectively; A second conductive connecting piece (35) is provided between the second connecting portions (321) on the second conductive row (32) which are electrically connected to the two electrical components (2), and two ends of the second conductive connecting piece (35) are electrically connected to the electrical components (2) respectively.

8. The battery pack disconnect unit according to claim 2, wherein: The first conductive sheet (310) has at least one vertically arranged first pin (312), the second conductive sheet (320) has at least one vertically arranged second pin (322), the surface of the upper shell (1) has at least one connecting seat (13), and both the first pin (312) and the second pin (322) pass through the upper shell (1) and are located in the connecting seat (13).

9. The battery pack disconnect unit according to claim 2, wherein: The first connecting portion (311) includes a first vertical sheet (3111) connected to the first conductive sheet (310), the second connecting 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 point (P) of the relay is located on the side wall, the first vertical sheet (3111) and the second vertical sheet (3211) are respectively electrically connected to the electrical connection point (P) of the relay.

10. The battery pack disconnect unit according to claim 9, wherein: The device further comprises a bottom shell (5), the bottom shell (5) being arranged on a side of the electrical connection component (3) away from the upper shell (1), the bottom shell (5) being provided with a plurality of first connection pillars (51) and second connection pillars (52), the first connection pillars (51) and the second connection pillars (52) both passing through the first conductive sheet (310), the second conductive sheet (320) and the upper shell (1) and extending out of the outer side of the upper shell (1); At least a portion of the first connecting portion (311) further comprises a first horizontal sheet (3112), the first horizontal sheet (3112) being vertically connected to an end of the first vertical sheet (3111) away from the first conductive sheet (310), and the first horizontal sheet (3112) being fixedly connected to an end surface of the first connecting column (51); At least a portion of the second connecting portion (321) further includes a second horizontal sheet (3212), the second horizontal sheet (3212) being vertically connected to an end of the second vertical sheet (3211) away from the second conductive sheet (320), and the second horizontal sheet (3212) being fixedly connected to an end surface of the second connecting column (52).

11. The battery pack disconnect unit according to claim 10, wherein: The electrical component (2) further comprises at least one fuse (25), the fuse (25) having a first electrical connection end (251) and a second electrical connection end (252) which are arranged opposite to each other, the surface of the upper shell (1) having a first support portion (11), the first electrical connection end (251) being fixedly arranged on the first support portion (11), the second electrical connection end (252) being arranged on the top surface of the first horizontal sheet (3112), and the second electrical connection end (252) being fixedly connected to the first horizontal sheet (3112) via the first connecting column (51).

12. The battery pack disconnect unit according to claim 10, wherein: The electrical component (2) also includes a current sensor (26); the surface of the upper shell (1) has a second support portion (12); one end of the current sensor (26) is horizontally fixed on the second support portion (12); the other end of the current sensor (26) is horizontally arranged on the top surface of the second horizontal sheet (3212); and one 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 connecting column (52).

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