Battery pack and electric device

Abstract

The application relates to the battery technical field and discloses a battery pack and an electric device, wherein the battery pack has a first direction, a second direction and a third direction intersecting with each other, and the battery pack comprises a box body and a first supporting beam. The box body has an inner cavity; the first supporting beam is arranged in the inner cavity, the first supporting beam extends along the first direction, the first supporting beam has two opposite side walls along the second direction, and at least one side wall is provided with a groove for passing through a conductive structure. The application arranges the conductive structure on the side wall of the first supporting beam, so that the conductive structure does not need to be arranged above the first supporting beam or above the electric core in the box body, the internal space of the battery pack is fully utilized, and the size of the battery pack in the height direction is effectively reduced. Moreover, the groove is arranged on the side wall of the first supporting beam, the conductive structure is accommodated in the groove, the occupied space of the conductive structure in the inner cavity along the second direction is further reduced, and the electric core in the inner cavity is conveniently arranged.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery pack and an electrical device. Background Technology

[0002] With the rapid development of the new energy battery industry, for some high-voltage interface models with front and rear four-wheel drive and fast charging functions, multiple conductive structures need to be arranged inside the battery pack in the front and rear directions of vehicle driving. The conductive structures connect the front high-voltage connector of the battery pack to the battery circuit breaker unit of the rear electrical compartment.

[0003] In related technologies, such battery systems typically place long copper busbars above the crossbeams in the middle of the battery pack or above the cells, resulting in an increase in the height dimension of the battery pack. Utility Model Content

[0004] In view of this, this application provides a battery pack and an electrical device to solve or improve the problem that the size of the battery pack in the height direction increases when a long copper busbar is arranged above the middle crossbeam of the battery pack or above the battery cell.

[0005] In a first aspect, this application provides a battery pack having intersecting first, second, and third directions, the battery pack including a housing and a first support beam. The housing has an inner cavity; the first support beam is disposed in the inner cavity, the first support beam extends along the first direction, the first support beam has two opposing sidewalls along the second direction, and at least one of the sidewalls is provided with a groove for a conductive structure to pass through.

[0006] Beneficial effects: This application arranges a conductive structure on the side wall of the first support beam, thereby eliminating the need for the conductive structure to be positioned above the first support beam or above the battery cells inside the housing, fully utilizing the internal space of the battery pack and effectively reducing the dimensions of the battery pack in the height direction. Furthermore, a groove is provided on the side wall of the first support beam, allowing the conductive structure to be accommodated within the groove, further reducing the space occupied by the conductive structure in the inner cavity along the second direction, facilitating the arrangement of the battery cells within the inner cavity.

[0007] In one alternative embodiment, the first support beam includes a bottom beam and a top beam disposed opposite each other along the third direction, an intermediate beam connecting the bottom beam and the top beam, and the conductive structure being connected to the intermediate beam.

[0008] Beneficial effects: By installing the conductive structure on the intermediate beam, the stability of the conductive structure under conditions such as battery pack vibration and impact is improved, ensuring the normal operation of the conductive structure.

[0009] In one alternative embodiment, the bottom beam is connected to the inner wall of the box at its two opposite ends along the first direction, and the top beam is spaced apart from the inner wall of the box at its two opposite ends along the first direction.

[0010] Beneficial effects: By setting the bottom beam to connect with the box body, the first support beam is fixed to the box body. The top beam has gaps between its two ends along the first direction and the inner wall of the box body, which facilitates the wiring and connection with other electrical components after the conductive structure extends out of the groove.

[0011] In one alternative embodiment, the groove is provided on one side wall of the first support beam, and the conductive structure is a copper busbar or a cable, with a fixing buckle connecting the copper busbar or the cable to the intermediate beam.

[0012] Beneficial effects: When a groove is provided on one side wall of the first support beam, the conductive structure can be a copper busbar installed on the intermediate beam via a fixing clip. The copper busbar has good current carrying capacity. Alternatively, the conductive structure can be a cable installed on the intermediate beam via a fixing clip. The cable has good vibration resistance and low operating cost.

[0013] In one optional embodiment, the grooves are provided on both of the opposite sidewalls of the first support beam; wherein the conductive structure is a copper busbar, and an adhesive layer is connected between the copper busbar and the intermediate beam; or, the conductive structure is a cable, and a fixing buckle is connected between the cable and the intermediate beam, and the two fixing buckles located in the two grooves are offset along the third direction.

[0014] The beneficial effect is that when grooves are provided on both side walls of the first support beam, it is convenient to flexibly arrange multiple copper busbars or multiple cables along both sides of the first support beam. Furthermore, the copper busbars can be fixed to the intermediate beam via an adhesive layer, and the cables can be fixed to the intermediate beam via fixing clips, facilitating the assembly of the copper busbars or cables.

[0015] In an optional embodiment, the grooves are provided on both of the opposite sidewalls of the first support beam, and the conductive structure is configured as a cable. A reinforcing beam is provided in the groove, wherein the reinforcing beam in one groove connects the bottom beam and the middle beam, and the reinforcing beam in the other groove connects the top beam and the middle beam.

[0016] Beneficial effects: When grooves are provided on both side walls of the first support beam, and the conductive structure is a cable, the cable occupies less space in the groove compared to the copper busbar. By setting a reinforcing beam in the groove, the connection strength between the middle beam and the bottom and top beams can be improved, thereby increasing the support strength of the first support beam.

[0017] In one alternative embodiment, the housing further includes a lid, and the top beam has a top surface along the third direction, the top surface of the top beam contacting the lid.

[0018] Beneficial effects: By having the top surface of the first support beam in direct contact with the surface of the box cover facing the box body, the first support beam can provide support for the box cover, thereby enhancing the box cover's resistance to deformation when subjected to external pressure and trampling, and effectively protecting the battery cells inside the box.

[0019] In an optional embodiment, a second support beam is further provided in the inner cavity, the second support beam extending along the second direction, and the first support beam intersecting with the second support beam.

[0020] Beneficial effects: The first and second support beams work together to effectively disperse impacts from all directions, improve the overall strength of the enclosure, and the intersecting first and second support beams divide the inner cavity into multiple cell installation areas, which facilitates the arrangement of cells in the inner cavity.

[0021] In one alternative embodiment, the second support beam is provided with a clearance opening, through which the conductive structure passes.

[0022] Beneficial effect: By setting a clearance opening on the second support beam, the conductive structure can pass through the second support beam without being cut off or excessively bent, which facilitates the wiring of the conductive structure.

[0023] In one optional embodiment, the enclosure further includes a front-drive high-voltage connector and a battery circuit breaker unit. The enclosure has a first end and a second end opposite to each other along the first direction. The front-drive high-voltage connector is disposed at the first end of the enclosure, and the battery circuit breaker unit is disposed at the second end of the enclosure. The front-drive high-voltage connector and the battery circuit breaker unit are connected through the conductive structure.

[0024] Beneficial effects: By placing the front-drive high-voltage connector and battery circuit breaker unit at the front and rear ends of the housing respectively, the overall layout requirements of electric vehicles with front and rear drive are met. Furthermore, the conductive structure is threaded through and fixed within the housing using the first support beam, maintaining reliable electrical connections while improving the space utilization within the housing.

[0025] Secondly, this application provides an electrical device including the battery pack described in any of the above claims.

[0026] Beneficial effects: The electrical device has the aforementioned battery pack. The side wall of the first support beam in the battery pack housing is provided with a groove, and a conductive structure is arranged in the groove. This eliminates the need for the conductive structure to be arranged above the first support beam or above the battery cells inside the housing, making full use of the internal space of the battery pack and effectively reducing the size of the battery pack in the height direction. This reduces the space occupied by the battery pack in the electrical device and facilitates the layout of the battery pack. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a structural schematic diagram showing the positional relationship between the first support beam and the second support beam in an embodiment of this application; Figure 2 Examples of this application Figure 1 A magnified view of a section at point A in the middle; Figure 3 Examples of this application Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is a structural schematic diagram illustrating a connection relationship between the cable and the intermediate beam in an embodiment of this application; Figure 5 This is a structural schematic diagram illustrating a connection relationship between the copper busbar and the intermediate beam in an embodiment of this application; Figure 6 This is a structural schematic diagram illustrating another connection relationship between the cable and the intermediate beam in an embodiment of this application; Figure 7 This is a structural schematic diagram illustrating another connection relationship between the copper busbar and the intermediate beam in an embodiment of this application; Explanation of reference numerals in the attached figures: X, first direction; Y, second direction; Z, third direction; 1. Box body; 101. Inner cavity; 102. Box bottom; 103. Side frame; 2. First supporting beam; 201. Bottom beam; 202. Top beam; 2021. Top surface; 203. Intermediate beam; 3. Groove; 4. Conductive structure; 401, copper busbar; 402, cable; 5. Reinforcing beam; 6. Second support beam; 601. Clearance opening; 7. Front drive high voltage connector; 8. Battery circuit breaker unit; 9. Fixing clip; 10. Adhesive layer. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The following is combined Figures 1 to 7 This describes an embodiment of the present application.

[0031] In a first aspect, this application provides a battery pack having intersecting first directions X, second directions Y, and third directions Z. The battery pack includes a housing 1 and a first support beam 2. The housing 1 has an inner cavity 101; the first support beam 2 is disposed in the inner cavity 101, the first support beam 2 extends along the first direction X, the first support beam 2 has two opposing sidewalls along the second direction Y, and at least one sidewall is provided with a groove 3 for a conductive structure 4 to pass through.

[0032] First, it should be noted that, as Figure 1 As shown, when the battery pack is installed on a vehicle, the first direction X in this embodiment can be defined as the forward and backward direction of the vehicle, the second direction Y can be defined as the width direction of the vehicle, and the third direction Z can be defined as the height direction of the vehicle. Of course, those skilled in the art can also make adaptive adjustments to the first direction X, the second direction Y, and the third direction Z according to actual needs.

[0033] In this embodiment, the housing 1 includes a bottom 102, a cover, and a side frame 103 disposed between the bottom 102 and the cover. The housing 1 forms the outer contour of the battery pack. The housing 1 has an inner cavity 101 for accommodating internal components such as cell modules and battery management units. A first support beam 2 is fixed in the inner cavity 101. The first support beam 2 is mainly used to strengthen the structural strength of the housing 1 and can provide installation support for the internal components installed in the inner cavity 101. The first support beam 2 extends along the first direction X, and a groove 3 is provided on the side wall of the first support beam 2 in the second direction Y. A conductive structure 4 is arranged in the groove 3 and extends along the first support beam 2.

[0034] In this way, the conductive structure 4 is arranged on the side wall of the first support beam 2, so that the conductive structure 4 does not need to be placed above the first support beam 2 or above the battery cells inside the housing 1, making full use of the internal space of the battery pack and effectively reducing the size of the battery pack in the height direction. Furthermore, a groove 3 is provided on the side wall of the first support beam 2, so that the conductive structure 4 can be accommodated in the groove 3, further reducing the space occupied by the conductive structure 4 in the inner cavity 101 along the second direction Y, which facilitates the arrangement of the battery cells in the inner cavity 101.

[0035] In one specific implementation, such as Figure 4 , Figure 5 As shown, a groove 3 is provided on one side wall of the first support beam 2, so that the first support beam 2 is roughly C-shaped, which makes it easy for the conductive structure 4 to be accommodated in the groove 3.

[0036] In another specific implementation, such as Figure 6 , Figure 7 As shown, grooves 3 are provided on both side walls of the first support beam 2, making the first support beam 2 roughly I-shaped. Conductive structures 4 can be arranged in both grooves 3, thereby increasing the number of conductive structures 4.

[0037] Optionally, the cross-sectional shape of the groove 3 is set to be rectangular or semi-circular to effectively accommodate the conductive structure 4.

[0038] Optionally, the aforementioned battery pack can be applied to a vehicle, such as a car, construction machinery, or other ground-based mobile equipment.

[0039] In one embodiment, the first support beam 2 includes a bottom beam 201 and a top beam 202 arranged opposite each other in the third direction Z, and an intermediate beam 203 is connected between the bottom beam 201 and the top beam 202. The conductive structure 4 is connected to the intermediate beam 203.

[0040] In this embodiment, as Figure 2 As shown, the bottom beam 201 has a top surface and a bottom surface along the third direction Z. The bottom surface of the bottom beam 201 can be fixed to the inner wall of the housing 1 by welding or bolting. An intermediate beam 203 is provided on the end face of the bottom beam 201 facing the top beam 202. The intermediate beam 203 can be used to support the conductive structure 4, so that the conductive structure 4 is fixed on the intermediate beam 203. In this way, by installing the conductive structure 4 on the intermediate beam 203, the stability of the conductive structure 4 under conditions such as battery pack vibration and impact is improved, ensuring the normal operation of the conductive structure 4.

[0041] Optionally, the first support beam 2 can be made of aluminum extrusion molding, which facilitates the preparation and production of the first support beam 2.

[0042] In one embodiment, the bottom beam 201 is connected to the inner wall of the box body 1 at its two opposite ends along the first direction X, and the top beam 202 is spaced apart from the inner wall of the box body 1 at its two opposite ends along the first direction X.

[0043] In this embodiment, as Figure 1 As shown, the bottom beam 201 is fixed to the inner wall of the housing 1 at both ends along the first direction X, improving the fixing effect between the first support beam 2 and the housing 1. The top beam 202 is spaced apart from the inner wall of the housing 1 at both ends along the first direction X, that is, there is a gap between the two ends of the top beam 202 and the inner wall of the housing 1. This gap allows the conductive structure 4 to pass through, facilitating wiring and connection with other electrical components after the conductive structure 4 extends out of the groove 3.

[0044] In one embodiment, a groove 3 is provided on one side wall of the first support beam 2, and the conductive structure 4 is set as a copper busbar 401 or a cable 402. A fixing buckle 9 is connected between the copper busbar 401 or the cable 402 and the intermediate beam 203.

[0045] In this embodiment, when the conductive structure 4 is a copper busbar 401, the copper busbar 401 is a high-voltage copper busbar. An insulating layer is wrapped around the outside of the copper busbar 401 to isolate it from the first support beam 2. The copper busbar 401 provides good current carrying capacity. When the conductive structure 4 is a cable 402, the cable 402 is insulated and fixed to the intermediate beam 203. The cable 402 provides good vibration resistance and has low operating costs.

[0046] Optionally, the copper busbar 401 and cable 402 can be fixed to the intermediate beam 203 by means of clips or adhesive, wherein the adhesive can be achieved using double-sided adhesive foam. The following description uses two copper busbars 401 or two cables 402 as an example. When a groove 3 is provided on one side wall of the first support beam 2, the first support beam 2 has a C-shaped structure. For example... Figure 4 As shown, the conductive structure 4 uses cables 402. Two cables 402 are integrated in the groove 3 and arranged along the third direction Z of the intermediate beam 203. The two cables 402 are respectively fixed to the intermediate beam 203 by fixing clips 9. Or, as Figure 5 As shown, the conductive structure uses copper busbars 401. Two copper busbars 401 are integrated in the groove 3 and arranged along the third direction Z of the intermediate beam 203. The two copper busbars 401 are fixed to the intermediate beam 203 by fixing buckles 9 or adhesive layers 10 respectively.

[0047] In one embodiment, grooves 3 are provided on both opposite sidewalls of the first support beam 2; wherein, the conductive structure 4 is a copper busbar 401, and an adhesive layer 10 is connected between the copper busbar 401 and the intermediate beam 203; or, the conductive structure 4 is a cable 402, and a fixing buckle 9 is connected between the cable 402 and the intermediate beam 203, and the two fixing buckles 9 located in the two grooves 3 are offset along the third direction Z.

[0048] In this embodiment, when grooves 3 are provided on both side walls of the first support beam 2, the first support beam 2 has an I-shaped structure. For example... Figure 6 As shown, the conductive structure 4 uses cables 402, with two cables 402 arranged and routed separately. Specifically, the two cables 402 are integrated into two grooves 3, and each cable 402 is fixed to the intermediate beam 203 by a fixing clip 9. Alternatively, as... Figure 7 As shown, the conductive structure 4 uses copper busbars 401, and two copper busbars 401 are arranged for wiring respectively. That is, the two copper busbars 401 are integrated into two grooves 3 respectively. The two copper busbars 401 can be fixed to the intermediate beam 203 by fixing buckles 9 or adhesive layers 10 respectively.

[0049] In one embodiment, grooves 3 are provided on the two opposite side walls of the first support beam 2, and the conductive structure 4 is configured as a cable 402. A reinforcing beam 5 is provided in the groove 3. One reinforcing beam 5 in one groove 3 connects the bottom beam 201 and the middle beam 203, and the reinforcing beam 5 in the other groove 3 connects the top beam 202 and the middle beam 203.

[0050] In this embodiment, as Figure 6 As shown, when the conductive structure 4 uses cable 402, since the diameter of cable 402 is small, the space occupied by cable 402 in the groove 3 is small. Therefore, a reinforcing beam 5 can be set in the groove 3. Taking the reinforcing beam 5 set on the bottom beam 201 as an example, one end of the reinforcing beam 5 along the third direction Z is fixedly connected to the top surface of the bottom beam 201, and one end of the reinforcing beam 5 along the second direction Y is fixed to the side wall of the intermediate beam 203. There is a gap between the top surface of the reinforcing beam 5 along the third direction Z and the bottom surface of the top beam 202 along the third direction Z. The cable 402 is arranged between the top surface of the reinforcing beam 5 and the bottom surface of the top beam 202. In this way, when grooves 3 are provided on both side walls of the first support beam 2, it is convenient for multiple cables 402 to be flexibly arranged along both sides of the first support beam 2, and the cables 402 occupy less space in the grooves 3. By providing reinforcing beams 5 on the bottom beam 201 and the top beam 202, the reinforcing beams 5 can improve the connection strength between the middle beam 203 and the bottom beam 201 and the top beam 202, thereby improving the support strength of the first support beam 2.

[0051] In another specific embodiment, besides the above-described embodiment of arranging reinforcing beams 5 within the grooves 3, when the conductive structure 4 uses cables 402, the dimensions of the grooves 3 on the two side walls can be reduced accordingly. That is, the dimensions of the two grooves 3 can be reduced, allowing the two grooves 3 to be staggered in the third direction Z. This also improves the supporting strength of the first supporting beam 2.

[0052] Of course, depending on the actual working conditions, when the space occupied by the copper busbar 401 in the groove 3 is small, a reinforcing beam 5 can also be arranged in the groove 3 to improve the overall support strength of the first support beam 2.

[0053] In one embodiment, the housing 1 further includes a lid, and the top beam 202 has a top surface 2021 along the third direction Z, the top surface 2021 of the top beam 202 being in contact with the lid.

[0054] In this embodiment, the top surface 2021 of the top beam 202 of the first support beam 2 is in direct contact with the surface of the cover facing the box body 1. The first support beam 2 can provide support for the cover, thereby enhancing the cover's resistance to deformation when subjected to external pressure and stepping, effectively protecting the battery cells inside the box body 1, and realizing the function of allowing the battery pack to be stepped on.

[0055] Optionally, the box cover can be integrated with the vehicle floor as a single structure, and the top surface 2021 of the top beam 202 can be bolted or bonded to the box cover, and the first support beam 2 can provide support for the box cover.

[0056] In one embodiment, a second support beam 6 is also provided in the inner cavity 101. The second support beam 6 extends along the second direction Y, and the first support beam 2 intersects with the second support beam 6.

[0057] In this embodiment, as Figure 1 , Figure 3 As shown, the second support beam 6 intersects with the first support beam 2, and the second support beam 6 is fixedly connected to the inner wall of the housing 1. Through the cooperation of the first support beam 2 and the second support beam 6, the impact from all directions can be effectively dispersed, and the overall strength of the housing 1 can be improved. Furthermore, the intersecting first support beam 2 and the second support beam 6 cooperate to divide the inner cavity 101 into multiple battery cell installation areas, which facilitates the arrangement of battery cells in the inner cavity 101.

[0058] In one embodiment, since the first support beam 2 and the second support beam 6 are intersecting in the inner cavity 101, in order to facilitate the wiring of the conductive structure 4, the second support beam 6 is provided with a clearance opening 601, and the conductive structure 4 passes through the clearance opening 601.

[0059] In this embodiment, as Figure 3As shown, the first support beam 2 can be configured as two segments along the first direction X, with the ends of the two segments of the first support beam 2 spaced apart. The second support beam 6 passes through the gap between the two segments of the first support beam 2. A clearance opening 601 is provided on the second support beam 6 at the position corresponding to the two segments of the first support beam 2. The clearance opening 601 is a notch recessed into the top surface of the second support beam 6. The conductive structure 4, whether using a copper busbar 401 or a cable 402, can pass through the clearance opening 601. Thus, by providing the clearance opening 601 on the second support beam 6, the conductive structure 4 can pass through the second support beam 6 without being cut off or excessively bent, facilitating the wiring of the conductive structure 4.

[0060] Of course, in addition to the above-mentioned segmented arrangement of the first support beam 2, the first support beam 2 can also be a continuous beam structure, with the second support beam 6 divided into two segments. The first support beam 2 passes through the space between the two segments of the second support beam 6, and the space formed between the two segments of the second support beam 6 can also allow the conductive structure 4 to pass through continuously, which is also convenient for wiring of the wire structure.

[0061] In one embodiment, the device further includes a front-drive high-voltage connector 7 and a battery circuit breaker unit 8. The housing 1 has a first end and a second end opposite to each other along the first direction X. The front-drive high-voltage connector 7 is disposed at the first end of the housing 1, and the battery circuit breaker unit 8 is disposed at the second end of the housing 1. The front-drive high-voltage connector 7 and the battery circuit breaker unit 8 are connected through a conductive structure 4.

[0062] In this embodiment, as Figure 1 As shown, taking the forward and backward direction of vehicle travel as an example, the front-drive high-voltage connector 7 is close to the front of the vehicle, the battery circuit breaker unit 8 is close to the rear of the vehicle, the front-drive high-voltage connector 7 is connected to one end of the conductive structure 4, the conductive structure 4 extends along the first support beam 2 to the rear of the vehicle, and finally connects to the battery circuit breaker unit 8 in the rear-drive electrical compartment of the battery pack to realize high-voltage energy transmission.

[0063] In this way, the front-drive high-voltage connector 7 and the battery circuit breaker unit 8 are respectively arranged at the front and rear ends of the housing 1, which meets the overall vehicle layout requirements for front and rear drive electric vehicles. Moreover, the conductive structure is installed and fixed inside the housing 1 by the first support beam 2, which improves the utilization rate of the space inside the housing 1 while maintaining reliable electrical connection.

[0064] Secondly, this application provides an electrical device including a battery pack of any of the above.

[0065] In this embodiment, the power device has the aforementioned battery pack. The side wall of the first support beam 2 in the housing 1 of the battery pack is provided with a groove 3, and a conductive structure 4 is arranged in the groove 3. This allows the conductive structure 4 to be arranged above the first support beam 2 or above the battery cells in the housing 1, making full use of the internal space of the battery pack, effectively reducing the size of the battery pack in the height direction, thereby reducing the space occupied by the battery pack on the power device and facilitating the layout of the battery pack.

[0066] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that, The battery pack has a first direction (X), a second direction (Y), and a third direction (Z) that intersect each other in pairs, and the battery pack includes: Box (1), the box (1) having an inner cavity (101); A first support beam (2) is disposed in the inner cavity (101). The first support beam (2) extends along the first direction (X) and has two opposing sidewalls along the second direction (Y). At least one of the sidewalls is provided with a groove (3) for the conductive structure (4) to pass through.

2. The battery pack according to claim 1, characterized in that, The first support beam (2) includes a bottom beam (201) and a top beam (202) arranged opposite each other along the third direction (Z), and an intermediate beam (203) is connected between the bottom beam (201) and the top beam (202), and the conductive structure (4) is connected to the intermediate beam (203).

3. The battery pack according to claim 2, characterized in that, The bottom beam (201) is connected to the inner wall of the box body (1) at its two opposite ends along the first direction (X), and the top beam (202) is spaced apart from the inner wall of the box body (1) at its two opposite ends along the first direction (X).

4. The battery pack according to claim 2, characterized in that, The first support beam (2) has a groove (3) on one of its side walls. The conductive structure (4) is a copper busbar (401) or a cable (402). The copper busbar (401) or the cable (402) is connected to the intermediate beam (203) by a fixing buckle (9).

5. The battery pack according to claim 2, characterized in that, The first support beam (2) has grooves (3) on its two opposite side walls. The conductive structure (4) is configured as a copper busbar (401), and an adhesive layer (10) is connected between the copper busbar (401) and the intermediate beam (203). Alternatively, the conductive structure (4) is configured as a cable (402), and a fixing buckle (9) is connected between the cable (402) and the intermediate beam (203), and the two fixing buckles (9) located in the two grooves (3) are offset along the third direction (Z).

6. The battery pack according to claim 2, characterized in that, The first support beam (2) has grooves (3) on its two opposite side walls, and the conductive structure (4) is a cable (402). A reinforcing beam (5) is provided in the groove (3). The reinforcing beam (5) in one of the grooves (3) connects the bottom beam (201) and the middle beam (203), and the reinforcing beam (5) in the other groove (3) connects the top beam (202) and the middle beam (203).

7. The battery pack according to claim 2, characterized in that, The box body (1) also includes a box cover, and the top beam (202) has a top surface (2021) along the third direction (Z), and the top surface (2021) of the top beam (202) is in contact with the box cover.

8. The battery pack according to any one of claims 1-7, characterized in that, The inner cavity (101) is also provided with a second support beam (6), which extends along the second direction (Y), and the first support beam (2) intersects with the second support beam (6).

9. The battery pack according to claim 8, characterized in that, The second support beam (6) is provided with a clearance opening (601), and the conductive structure (4) passes through the clearance opening (601).

10. The battery pack according to any one of claims 1-7, characterized in that, It also includes a front-drive high-voltage connector (7) and a battery circuit breaker unit (8). The housing (1) has a first end and a second end opposite to each other along the first direction (X). The front-drive high-voltage connector (7) is disposed at the first end of the housing (1), and the battery circuit breaker unit (8) is disposed at the second end of the housing (1). The front-drive high-voltage connector (7) and the battery circuit breaker unit (8) are connected through the conductive structure (4).

11. An electrical appliance, characterized in that, The battery pack includes any one of claims 1-10.

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