Battery pack and electric device

Abstract

The application discloses a battery pack and an electric device. The battery pack comprises a box body, a battery module battery pack and a high-voltage assembly. The box body has a first opening end and comprises a cavity. The battery module battery pack is arranged in the cavity. The battery module battery pack comprises a first battery module battery pack and a second battery module battery pack which are arranged at intervals along a second direction. The first battery module battery pack and the second battery module battery pack are respectively provided with a total positive output end and a total negative output end on a side close to the first opening end. The high-voltage assembly comprises a high-voltage positive connector and a high-voltage negative connector. The high-voltage positive connector and the high-voltage negative connector are fixed to the box body and are located on the same side of the first opening end. The high-voltage positive connector is electrically connected with the total positive output end. The high-voltage negative connector is electrically connected with the total negative output end. The battery pack of the application can reasonably arrange and electrically connect multiple battery module battery packs in the cavity, ensure that the number of arranged battery monomers meets the energy density requirement, and reliably arrange the total positive output end and the total negative output end on the same side of the box body.

Description

Technical Field

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

[0002] With the rapid development of new energy aircraft such as electric vertical takeoff and landing (eVTOL) aircraft, the energy density, power density, and structural reliability requirements for power battery systems are far more stringent than those for ground transportation vehicles. Cylindrical battery cells have become the preferred cell form for current aerospace-grade battery packs due to their high degree of standardization, excellent shell structural strength, and leading single-cell energy and energy density.

[0003] However, the inherent circular cross-sectional geometry of cylindrical battery cells presents significant technical challenges to the integrated design of battery packs. On one hand, the cylindrical arrangement inevitably creates arc-shaped gaps between battery cells, resulting in inherently low space utilization at the module level. On the other hand, the airframe structure of eVTOL aircraft is often streamlined or irregularly shaped, meaning the mounting envelope for the battery pack is often not a regular rectangle or square. When the overall envelope of the customer's aircraft has an irregular profile, existing battery arrangement methods face the following problems: Firstly, to meet the stringent range requirements of aircraft, as many battery cells as possible must be accommodated within a limited and irregularly shaped enclosure. Traditional rectangular array brackets cannot fit snugly against the inner wall of the irregular enclosure, resulting in a large amount of unused space in the corner areas, leading to significant space waste and making it difficult to improve the overall energy density of the battery pack.

[0004] Secondly, aircraft have strict interface requirements for the layout of high-voltage connectors on battery packs. Typically, it is mandated that the main positive and negative high-voltage connectors must originate from the same side of the battery pack to accommodate the fixed interfaces of the aircraft's high-voltage power distribution unit. In irregularly shaped battery packs, this is difficult to achieve due to structural and space constraints. Forcing a layout or rerouting would not only exacerbate spatial conflicts between the high-voltage system and the thermal management system piping and low-voltage wiring harnesses, but could also lead to interference risks due to excessively long bridging paths and numerous bends.

[0005] In summary, how to maximize the arrangement of individual battery cells within the compact space of irregularly shaped battery packs, while reliably achieving the same-side lead-out of the high-voltage circuit without spatial conflicts, has become a pressing technical problem to be solved in this field. Summary of the Invention

[0006] One objective of this invention is to disclose a battery pack and power supply device. By rationally arranging and electrically connecting multiple battery modules within the cavity of the housing, the number of individual battery cells meets the energy density requirements for aerospace applications. At the same time, the total positive output terminal and the total negative output terminal are reliably concentrated on the same side of the housing. This results in clear wiring of the high-voltage components on the battery pack and a small space occupation. It effectively resolves the spatial conflict between the arrangement of individual battery cells and the direction of high-voltage output lines in irregularly shaped envelopes, and significantly improves the structural compactness and electrical safety of the entire pack.

[0007] The second objective of this invention is to disclose an electrical device that uses the aforementioned battery pack, which results in a long battery life, convenient and reasonable high-voltage wiring, and greatly improved electrical safety.

[0008] To achieve the above objectives, the present invention discloses a battery pack, comprising: A box body, the box body including a cavity, having a first open end along a first direction, the first direction being the length direction of the box body; A battery module assembly is disposed within the cavity. The battery module assembly includes a first battery module assembly and a second battery module assembly, which are spaced apart along a second direction. The first battery module assembly has a total positive output terminal on the side near the first opening end along the first direction. The second battery module assembly has a total negative output terminal on the side near the first opening end along the first direction. The second direction is the width direction of the housing. The high-voltage assembly includes a high-voltage positive connector, a high-voltage negative connector, and a conductive connector. The high-voltage positive connector and the high-voltage negative connector are both fixed to the housing and located on the same side of the first opening end. The high-voltage positive connector is electrically connected to the total positive output terminal, and the high-voltage negative connector is electrically connected to the total negative output terminal. The first battery module and the second battery module are also electrically connected through the conductive connector.

[0009] As an optional embodiment, the battery pack further includes a separator and two module brackets. The separator is placed inside the housing and, along a third direction, divides the cavity into a first receiving cavity and a second receiving cavity arranged opposite to each other. The two module brackets are respectively located in the first receiving cavity and the second receiving cavity and are fitted to both sides of the separator along the third direction. The module brackets are configured to limit the installation of the battery module battery pack, and the third direction is the height direction of the housing. Both the first accommodating cavity and the second accommodating cavity are provided with the first battery module battery pack and the second battery module battery pack, and the two first battery module battery packs are arranged opposite each other along the third direction, and the two second battery module battery packs are arranged opposite each other along the third direction.

[0010] As an optional embodiment, the high-voltage assembly further includes a first conductive element, a second conductive element, a first connecting bar, and a second connecting bar; The first conductive element is electrically connected between the two first battery module battery packs. The total positive output terminal is located on the first battery module battery pack installed in the first accommodating cavity and avoids the first conductive element. The total positive output terminal is electrically connected to the high voltage positive connector through the first connecting bar. The two second battery module battery packs are electrically connected by the second conductive element. The total negative output terminal is located on the second battery module battery pack installed in the first accommodating cavity and avoids the second conductive element. The total negative output terminal is electrically connected to the high voltage negative terminal connector through the second connecting bar. The conductive connector is located in the second accommodating cavity and bridges the first battery module battery pack and the second battery module battery pack that are spaced apart in the second accommodating cavity. Both the first conductive member and the second conductive member extend along the third direction and pass through the separator and the module bracket to achieve the bridging.

[0011] As an optional embodiment, both the separator and the module bracket are provided with a first through hole and a second through hole. The first conductive element passes through the first through hole, and its two ends are respectively located in the first accommodating cavity and the second accommodating cavity. The second conductive element passes through the second through hole, and its two ends are respectively located in the first accommodating cavity and the second accommodating cavity. The first conductive element is insulated from both the separator and the module bracket, and the second conductive element is insulated from both the separator and the module bracket.

[0012] As an optional embodiment, the housing has a first extension and a second extension, both of which extend along the first direction and are spaced apart along the second direction. The high-voltage positive connector is fixed to the end of the first extension near the first opening and extends into the first accommodating cavity, and the high-voltage negative connector is fixed to the end of the second extension near the first opening and extends into the first accommodating cavity.

[0013] As an optional embodiment, the housing further includes a connecting portion disposed between the first extension and the second extension. Along the second direction, one end of the connecting portion is fixedly connected to the middle portion of the first extension, and the other end of the connecting portion is fixedly connected to the middle portion of the second extension, so that the first extension, the second extension, and the connecting portion together enclose the cavity.

[0014] As an optional embodiment, the first extension and the second extension avoid the area of ​​the connecting portion to form the first opening end and the second opening end, and along the second direction, the distance of the first opening end is greater than the distance of the second opening end; The conductive connector is sequentially inserted through the first extension, the connecting portion, and the second extension and is located within the second accommodating cavity, and is positioned on the side closest to the first opening end along the first direction.

[0015] As an optional embodiment, the battery pack further includes a low-voltage component, which includes a first terminal block, a second terminal block, a first battery management module, and a second battery management module. The first terminal is mounted on the first extension and extends into the first receiving cavity, the second terminal is mounted on the second extension and extends into the first receiving cavity, and both the first terminal and the second terminal are located on the same side of the first opening end; The first battery management module is installed in the connecting part and located in the first accommodating cavity, and is positioned close to the battery pack of the first battery module. The second battery management module is installed in the connecting part and located in the first accommodating cavity, and is positioned close to the battery pack of the second battery module. The first terminal block is electrically connected to the first battery management module via a wiring harness, and the second terminal block is electrically connected to the second battery management module via a wiring harness.

[0016] As an optional embodiment, the enclosure is an insulated enclosure.

[0017] To achieve the above objectives, the present invention also discloses an electrical device including the aforementioned battery pack.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The battery pack of this invention comprises a first battery module and a second battery module arranged at intervals along a second direction. Each module has a total positive output terminal and a total negative output terminal on its side closest to the first opening. This arrangement brings the two high-voltage output terminals spatially closer to the same end, allowing the module layout to actively adapt to the same-side wiring constraints of the aircraft. This avoids sacrificing space for individual battery cells or adding adapter structures to accommodate the aircraft's wiring direction, thus achieving simultaneous optimization of the number of battery modules and high-voltage wiring. Both the high-voltage positive connector and the high-voltage negative connector are fixed to the same side of the first opening of the housing and electrically connected to the total positive and total negative output terminals, respectively. This allows the high-voltage circuit to be centrally led out from the same side of the housing, directly solving the layout adaptation problem caused by the fixed interface of the entire aircraft for irregularly shaped battery packs. It achieves direct connection between the battery pack and the high-voltage power distribution unit of the aircraft, reducing intermediate adapter links and balancing energy density and electrical reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the external structure of a battery pack according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the housing structure in one embodiment of a battery pack according to the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of a battery pack according to one embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the internal structure of a battery pack according to one embodiment of the present invention from another angle. Figure 3 A bottom view.

[0024] Figure 5 This is a schematic diagram of the external structure of a battery pack according to an embodiment of the present invention.

[0025] Figure 6 for Figure 1 Exploded view.

[0026] Figure 7 This is a schematic diagram of the partition and module support structure of the present invention.

[0027] Figure 8 A battery pack of the present invention Figure 1 Top view.

[0028] Figure 9 This is a spatial diagram showing the area where the battery pack can be arranged.

[0029] Figure 10 A schematic diagram of the structure of the battery pack and battery unit on the aircraft.

[0030] Explanation of key figure labels: 10. Box body; 11. First extension; 12. Second extension; 13. Connecting part; 14. First box cover; 15. Second box cover; 100. Cavity; 101. First receiving cavity; 102. Second receiving cavity; 103. First opening end; 104. Second opening end; 105. Connecting beam; 20. Separator; 25. Module bracket; 251. Circular groove; 252. Through hole; 30. Battery module / battery pack; 301. First battery module / battery pack; 302. Second battery module / battery pack; 35. Total positive output terminal; 351. First connector bar; 36. Total negative output terminal; 361. Second connector bar; 40. High-voltage component; 41. High-voltage positive connector; 42. High-voltage negative connector; 43. First conductive element; 44. Conductive connector; 45. Second conductive element; 46. First through hole; 47. Second through hole; 50. Low-voltage component; 51. First terminal block; 52. Second terminal block; 53. First battery management module; 54. Second battery management module. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0033] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0034] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0036] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0037] Please see Figures 1-8 This application provides a battery pack.

[0038] This battery pack is primarily used in electrical devices such as new energy aircraft and spacecraft. The structure of aircraft and spacecraft differs from that of conventional electrical devices (such as vehicles), and the available locations and spaces for battery pack placement also differ. In aircraft and spacecraft, battery packs are typically located in the leading edge region of the wing. This region usually houses the main spars, propeller, and ductwork, limiting the battery pack's placement to the main spars and ensuring it does not extend beyond their envelope. In this embodiment, the areas available for battery pack placement on the aircraft and spacecraft are adjacent, ring-shaped regions, such as… Figure 9 As shown. Existing conventional battery packs are mostly standard square structures, which cannot be adapted to such irregularly shaped annular narrow installation spaces. They generally have defects such as sparse arrangement of battery cells, low space utilization, mismatch between high voltage outputs and the overall machine interface, weak thermal runaway protection capability, and poor vibration resistance, making it difficult to meet the stringent requirements of high energy density, high safety, and high reliability for aircraft.

[0039] Please see Figure 10This is a schematic diagram of the battery pack arrangement on the aircraft according to this embodiment, where the thick solid line shows the outline of the battery pack. To facilitate understanding of the structure of this battery pack by those skilled in the art, the battery pack and its internal structural components, such as the battery module and battery pack 30, are described in detail below.

[0040] In one embodiment, please refer to Figures 1-8 The battery pack includes a housing 10, a battery module battery pack 30, and a high-voltage component 40.

[0041] The box 10 includes a cavity 100 and has a first open end 103 along a first direction, which is the length direction of the box 10.

[0042] The battery module 30 is disposed within the cavity 100. The battery module 30 includes a first battery module 301 and a second battery module 302, which are spaced apart along a second direction. The first battery module 301 has a total positive output terminal 35 on the side near the first opening end 103 along the first direction, and the second battery module 302 has a total negative output terminal 36 on the side near the first opening end 103 along the first direction. The second direction is the width direction of the housing 10.

[0043] The high-voltage assembly 40 includes a high-voltage positive connector 41, a high-voltage negative connector 42, and a conductive connector 44. Both the high-voltage positive connector 41 and the high-voltage negative connector 42 are fixed to the housing 10 and located on the same side of the first opening end 103. The high-voltage positive connector 41 is electrically connected to the total positive output terminal 35, and the high-voltage negative connector 42 is electrically connected to the total negative output terminal 36. The first battery module battery pack 301 and the second battery module battery pack 302 are also electrically connected via the conductive connector 44.

[0044] The electrical pathway formed by the high-voltage component 40 and the battery module 30 inside the housing 10 includes: a high-voltage positive connector 41, a total positive output terminal 35, a first battery module 301, a conductive connector 44, a second battery module 302, a total negative output terminal 36, and a high-voltage negative connector 42.

[0045] In this embodiment, due to the irregular structure of the battery pack, the first battery module battery pack 301 and the second battery module battery pack 302 are spaced apart along the second direction within the cavity 100 of the housing 10. This makes full use of the space and volume of the cavity 100 within the housing 10, thereby maximizing the number of battery module battery packs 30 in the cavity 100 of the housing 10. This solves the problem of limited battery cell arrangement and serious space waste in the annular installation space, improves the energy density and power density of the battery pack, and meets the power requirements of the aircraft.

[0046] In this embodiment, due to the irregular structure of the battery pack, the first battery module battery pack 301 and the second battery module battery pack 302 are spaced apart along the second direction within the cavity 100 of the housing 10. The first battery module battery pack 301 has a total positive output terminal 35 on the side near the first opening end 103 along the first direction, and the second battery module battery pack 302 has a total negative output terminal 36 on the side near the first opening end 103 along the first direction. This arrangement allows the two high-voltage output terminals, the total positive output terminal 35 and the total negative output terminal 36, to be spatially aligned with the same end. This allows the layout of the first battery module battery pack 301 and the second battery module battery pack 302 to actively adapt to the same-side wiring constraint of the whole machine, avoiding sacrificing the cell battery arrangement space or adding additional adapter structures to accommodate the wiring direction. Then, the high-voltage positive connector 41 is electrically connected to the total positive output terminal 35, and the high-voltage negative connector 42 is electrically connected to the total negative output terminal 36. It is ensured that both the high-voltage positive connector 41 and the high-voltage negative connector 42 are fixed to the housing 10 and are located on the same side of the first opening end 103. This means that the high-voltage circuit can be centrally led out from the same side of the housing 10 (the first opening end 103 of the housing 10) without adding additional adapters or extending the bridging path. This embodiment directly solves the problem that irregularly shaped battery packs are difficult to adapt to the layout of the battery modules 30 inside the battery pack due to the fixed interface of the aircraft. It enables the battery pack and the high-voltage power distribution unit of the aircraft to achieve a plug-and-play direct electrical connection, reduces intermediate transfer links, significantly reduces the number of high-voltage contacts, and reduces the probability of contact oxidation, loose connection, and failure. It achieves compatibility between the energy density of the battery pack and the direct connection of high-voltage wiring, and improves the reliability of the electrical system of the aircraft (electrical device).

[0047] In this embodiment, the first battery module battery pack 301 and the second battery module battery pack 302 are spaced apart along a second direction. The first battery module battery pack 301 has a total positive output terminal 35 on the side near the first opening end 103 along the first direction, and the second battery module battery pack 302 has a total negative output terminal 36 on the side near the first opening end 103 along the first direction. The high-voltage positive connector 41 is electrically connected to the total positive output terminal 35, and the high-voltage negative connector 42 is electrically connected to the total negative output terminal 36. The first battery module battery pack 301 and the second battery module battery pack 302 are also electrically connected through a conductive connector 44. Both the high-voltage positive connector 41 and the high-voltage negative connector 42 are fixed to the housing 10 and are both located at the first opening end 103. On the same side, this configuration connects the first battery module 301 and the second battery module 302 in series, forming a circuit loop consisting of a high-voltage positive connector 41, a total positive output terminal 35, the first battery module 301, a conductive connector 44, the second battery module 302, a total negative output terminal 36, and a high-voltage negative connector 42. This circuit loop is short and has few bends, significantly reducing the internal resistance of the high-voltage circuit during battery pack operation. It also reduces Joule heat generation under high-current charging and discharging conditions, greatly reducing Joule heat generated by the aircraft under high-power consumption conditions. This effectively improves the overall temperature uniformity of the battery pack, prevents localized hot spot accumulation, and significantly improves the energy efficiency and lifespan of the battery pack.

[0048] Furthermore, this embodiment facilitates battery pack assembly. Since both the high-voltage positive connector 41 and the high-voltage negative connector 42 are fixed to the housing 10 and located on the same side of the first opening end 103, the assembler only needs to perform the insertion operation of the two high-voltage connectors (high-voltage positive connector 41 and high-voltage negative connector 42) on the same side of the housing 10 during battery pack assembly. This eliminates the need to operate on different sides of the housing 10 separately, significantly simplifying the battery pack installation process and shortening assembly time. Simultaneously, during subsequent maintenance and battery pack replacement, operators can disconnect and connect the high-voltage terminals of the entire aircraft to the high-voltage positive connector 41 and high-voltage negative connector 42 from the same location, reducing operational difficulty, improving operational efficiency, and reducing the risk of misoperation.

[0049] In this embodiment, the first battery module battery pack 301 and the second battery module battery pack 302 are spaced apart along the second direction. The first battery module battery pack 301 has a total positive output terminal 35 on the side near the first opening end 103 along the first direction, and the second battery module battery pack 302 has a total negative output terminal 36 on the side near the first opening end 103 along the first direction. Thus, although the high-voltage positive connector 41 and the high-voltage negative connector 42 are located on the same side of the housing 10, they have sufficient distance between them in the second direction. This ensures the physical connection between the high-voltage positive connector 41 and the high-voltage negative connector 42 in terms of spatial position. The spacing allows the high-voltage positive connector 41 and high-voltage negative connector 42, which are fixed to the same side of the first opening end 103 of the housing 10, to have sufficient isolation space. This ensures that there is sufficient high-voltage electrical safety creepage distance and electrical clearance between the high-voltage positive connector 41 and the high-voltage negative connector 42, greatly reducing the risk of insulation breakdown and short circuit between them. No additional insulation structure is required between the high-voltage positive connector 41 and the high-voltage negative connector 42, simplifying the battery pack structure, reducing the space occupied by the insulation structure and the overall weight, which is in line with the lightweight design of aerospace equipment and ensures the electrical safety of the battery pack.

[0050] In this embodiment, the first battery module battery pack 301 and the second battery module battery pack 302 are spaced apart along the second direction, and the two are respectively provided with a total positive output terminal 35 and a total negative output terminal 36 on the side near the first opening end 103, so that the two high-voltage output terminals are spatially close to the same end, that is, the multiple battery module battery packs 30 are reasonably arranged and electrically connected, ensuring that the number of battery cells meets the energy density requirements of aviation grade, while reliably arranging the total positive output terminal 35 and the total negative output terminal 36 on the same side of the housing 10, so that the high-voltage components 40 on the battery pack have clear wiring and occupy little space, effectively resolving the spatial conflict between the battery cell arrangement and the high-voltage output direction in the irregular envelope, and significantly improving the structural compactness and electrical safety of the whole pack.

[0051] In one embodiment, please refer to Figures 2-3 The battery pack also includes a separator 20 and two module support brackets 25. The separator 20 is placed inside the housing 10 and, along a third direction, divides the cavity 100 into a first receiving cavity 101 and a second receiving cavity 102 that are arranged opposite to each other. The two module support brackets 25 are respectively located in the first receiving cavity 101 and the second receiving cavity 102 and are fitted to both sides of the separator 20 along a third direction. The module support brackets 25 are configured to limit the installation of the battery module battery pack 30. The third direction is the height direction of the housing 10.

[0052] The first accommodating cavity 101 and the second accommodating cavity 102 are each provided with a first battery module battery pack 301 and a second battery module battery pack 302, and the two first battery module battery packs 301 are arranged opposite each other along a third direction, and the two second battery module battery packs 302 are arranged opposite each other along a third direction.

[0053] In this embodiment, the separator 20 divides the cavity 100 inside the housing 10 into a first accommodating cavity 101 and a second accommodating cavity 102 along a third direction. Simply put, the cavity 100 is divided into two layers of space along a third direction, and a first battery module battery pack 301 and a second battery module battery pack 302 are arranged in both layers of space. In each layer of space, the first battery module battery pack 301 and the second battery module battery pack 302 are arranged along a second direction. This doubles the number of battery modules battery packs 30 inside the battery pack compared to a single layer of space. In this embodiment, the cavity 100 is divided into layers by the partition 20, and battery modules and battery packs 30 are fully arranged in each layer. This makes full use of the size space of the irregularly shaped battery pack box 10 in the third direction (height direction). Without increasing the length and width of the box 10, the number of individual battery cells is doubled, which effectively improves the volumetric energy density of the entire battery pack, meets the power demand of the aircraft, and also makes the battery pack lighter.

[0054] In addition, a module bracket 25 is provided on both sides of the separator 20. The module bracket 25 is configured to limit the installation of the battery module battery pack 30. That is, the module bracket 25 is used to fix the first battery module battery pack 301 and the second battery module battery pack 302, ensuring that the battery module battery pack 30 is reliably installed. When the aircraft encounters turbulent airflow, emergency take-off and landing, or accidental collision, the battery module battery pack 30 will be held in a preset position due to the restriction of the module bracket 25, avoiding problems such as shaking, collision, and tipping inside the battery module battery pack 30, ensuring the safety of the battery module battery pack 30 and avoiding electrical risks.

[0055] Furthermore, the two module brackets 25 are respectively set on both sides of the separator 20. The separator 20 divides the cavity 100 into two layers of space along the height direction, and these two layers of space are physically isolated by the separator 20. At this time, the first battery module battery pack 301 and the second battery module battery pack 302 are set in both layers of space, and the first battery module battery pack 301 and the second battery module battery pack 302 are spaced apart along the first direction in the same layer of space. In this way, when a battery module battery pack 30 in one layer experiences abnormal conditions such as thermal runaway, the separator 20 can effectively block the spread of heat and prevent the thermal runaway fault from spreading from one layer to another. It can be seen that the setting of the separator 20 not only increases the number of battery modules battery packs 30 in the battery pack, but also significantly improves the electrical safety of the battery pack. It has the ability to isolate faults in layers. The failure of a single layer of battery pack will not affect the entire pack. It can be used in conjunction with the aircraft control system to achieve degraded flight, which greatly improves the flight safety and fault redundancy capability of the aircraft.

[0056] Furthermore, it can be understood that the separator 20 divides the cavity 100 into a first accommodating cavity 101 and a second accommodating cavity 102 along the height direction. The first accommodating cavity 101 and the second accommodating cavity 102 are independent of each other. When the battery module battery pack 30 in the first accommodating cavity 101 or the second accommodating cavity 102 experiences thermal runaway, its thermal runaway airflow will be discharged nearby in the accommodating cavity, shortening the thermal runaway airflow discharge path. By accelerating the discharge of thermal runaway airflow, the safety of the battery pack is ensured, and the battery pack is prevented from experiencing further greater risk accidents.

[0057] In one embodiment, the separator 20 may be made of insulating material or have an insulating coating on its surface, which effectively avoids the risk of leakage and arcing between the separator 20 and the battery pack 30 and conductive structure, avoids the insulation between the separator 20 and the battery module battery pack 30, and also enhances the high voltage insulation reliability between the upper and lower layers of the cavity 100.

[0058] In one embodiment, the partition 20 is a partition plate, the outer contour of which is consistent with the contour of the cavity 100. When the partition plate is installed, the outer peripheral surface of the partition plate is welded to the cavity wall (inner wall of the box 10) of the cavity 100. In addition, the shape and outer contour dimensions of the module bracket 25 are consistent with the structure of the partition plate, and the outer peripheral surface of the module bracket 25 is also welded to the cavity wall of the cavity 100. At this time, the partition plate and the module bracket 25 form a support structure for the inner wall of the box 10. The partition plate and the module bracket 25 can act as reinforcing ribs of the box 10. When the aircraft encounters turbulent airflow or accidental collision, the box 10 is subjected to external loads from all directions. The partition 20 and the module bracket 25 can effectively resist the deformation of the box 10 along the length and width directions, significantly improving the rigidity and impact resistance of the irregular box 10.

[0059] In one embodiment, please refer to Figure 4 and Figure 7 The module support bracket 25 is a support plate. A circular groove 251 is provided on the support plate to accommodate each cylindrical battery cell of the battery module battery pack 30. When assembling the battery module battery pack 30, the cylindrical battery cells of the battery module battery pack 30 are placed in the circular groove 251. The position of the circular groove 251 fixes the relative position of adjacent battery cells, ensuring that the arrangement of adjacent battery cells is standardized. This avoids problems such as collision or expansion friction caused by too small gaps between some battery cells, and also avoids space waste caused by too large gaps between some battery cells.

[0060] The diameter of the circular groove 251 is consistent with the outer diameter of the battery cell. The circular groove 251 fits with the battery cell with a gap, providing space for the expansion of the battery cell during charging and discharging. Then, the first cover 14 and the second cover 15 of the battery pack are set opposite to the bracket plate, fixing the cylindrical battery cell in the circular groove 251 along its axis. This achieves the configuration of the module bracket 25 to limit the installation of the battery module battery pack 30. The cooperation between the cover and the bracket plate achieves axial compression and fixation of the battery cell, and the bidirectional limiting completely prevents the battery cell from moving around. At the same time, it adaptively absorbs the expansion and contraction deformation of the battery cell during charging and discharging, avoiding damage to the battery cell due to compression.

[0061] In one embodiment, please refer to Figure 7 The bottom surface of the circular groove 251 of the support plate is provided with a through hole 252. This design ensures that the air pressure inside and outside the circular groove 251 is consistent, which facilitates the installation of cylindrical battery cells. On the other hand, the through hole 252 connects the space on both sides of the support plate, which increases the position and effective area of ​​the exhaust channel for thermal runaway airflow in the event of thermal runaway of the battery pack, thereby accelerating the discharge of thermal runaway airflow.

[0062] In one embodiment, please refer to Figure 7 The side of the support plate facing the separator plate has a certain gap with the separator plate, which serves as a channel for thermal runaway airflow discharge. This gap, together with the through hole on the bottom of the groove, forms a three-dimensional mesh exhaust channel, which comprehensively improves the thermal runaway pressure relief efficiency and further enhances the thermal safety protection capability of the battery pack.

[0063] In one embodiment, please refer to Figures 1-5 The high-voltage component 40 also includes a first conductive element 43, a second conductive element 45, a first connecting bar 351, and a second connecting bar 361.

[0064] Two first battery module battery packs 301 are electrically connected by a first conductive element 43. The total positive output terminal 35 is located on the first battery module battery pack 301 installed in the first accommodating cavity 101 and avoids the first conductive element 43. The total positive output terminal 35 is electrically connected to the high voltage positive connector 41 through the first connecting bar 351.

[0065] A second conductive element 45 is electrically connected between the two second battery module battery packs 302. The total negative output terminal 36 is located on the second battery module battery pack 302 installed in the first accommodating cavity 101 and avoids the second conductive element 45. The total negative output terminal 36 is electrically connected to the high voltage negative terminal connector 42 through the second connecting bar 361.

[0066] The conductive connector 44 is located in the second accommodating cavity 102 and bridges the first battery module battery pack 301 and the second battery module battery pack 302 that are spaced apart in the second accommodating cavity 102. The first conductive member 43 and the second conductive member 45 both extend in a third direction and pass through the separator 20 and the module bracket 25 to achieve the bridging.

[0067] In this embodiment, the first battery module battery pack 301 in the first accommodating cavity 101 and the second accommodating cavity 102 is electrically connected in series through the first conductive element 43, and the second battery module battery pack 302 in the first accommodating cavity 101 and the second accommodating cavity 102 is electrically connected in series through the second conductive element 45. Thus, multiple battery module battery packs 30 in the two layers of accommodating cavities along the altitude direction are connected in series into a complete high-voltage circuit. The total positive output terminal 35 is led out from the first battery module battery pack 301 in the first accommodating cavity 101, and the total negative output terminal 36 is led out from the second battery module battery pack 302 in the first accommodating cavity 101. Finally, they are connected to the high-voltage positive connector 41 and the high-voltage negative connector 42 through the first connecting bar 351 and the second connecting bar 361, respectively, forming a complete electrical path. This achieves a stable supply of the rated voltage of the entire battery pack and meets the power requirements of the aircraft.

[0068] In this embodiment, the first battery module battery pack 301 in the first accommodating cavity 101 and the second accommodating cavity 102 is electrically connected in series via the first conductive element 43, and the second battery module battery pack 302 in the first accommodating cavity 101 and the second accommodating cavity 102 is electrically connected in series via the second conductive element 45. The total positive output terminal 35 is disposed on the first battery module battery pack 301 in the first accommodating cavity 101 and avoids the position of the first conductive element 43. The total negative output terminal 36 is disposed on the second battery module battery pack 301 in the first accommodating cavity 101. The battery pack 302 is positioned to avoid the second conductive element 45. This avoidance design ensures that there is sufficient electrical safety clearance between the output terminals (total positive output terminal 35 and total negative output terminal 36) and the conductive elements (first conductive element 43 and second conductive element 45), avoiding the risk of accidental short circuits between the total positive output terminal 35 and the first conductive element 43, and between the total negative output terminal 36 and the second conductive element 45. At the same time, it prevents collisions and interference between various structural components in space, facilitates assembly and maintenance, and improves the electrical safety performance of the battery pack.

[0069] In this embodiment, the conductive connector 44 is located inside the second accommodating cavity 102 and bridging the first battery module battery pack 301 and the second battery module battery pack 302 that are spaced apart inside the second accommodating cavity 102. The first conductive member 43 and the second conductive member 45 both extend along a third direction and pass through the separator 20 and the module support bracket 25 to achieve bridging. That is, the first conductive member 43 and the second conductive member 45 realize the vertical electrical connection of the battery module battery pack 30 between the upper and lower layers (the first accommodating cavity 101 and the second accommodating cavity 102). This layer-by-layer bridging method completes the electrical connection between the upper and lower layers in the accommodating cavity in the height direction. It does not require the setting of a winding conductive member in the length or width direction of the housing 10, which greatly saves the horizontal space, shortens the circuit path, reduces the resistance, and improves the reliability of the electrical connection.

[0070] In one embodiment, please refer to Figure 5 and Figure 7 Both the separator 20 and the module bracket 25 are provided with a through hole 46 and a through hole 47. A first conductive element 43 passes through the first through hole 46, and its two ends are located in the first accommodating cavity 101 and the second accommodating cavity 102, respectively. A second conductive element 45 passes through the second through hole 47, and its two ends are located in the first accommodating cavity 101 and the second accommodating cavity 102, respectively. The first conductive element 43 is insulated from both the separator 20 and the module bracket 25, and the second conductive element 45 is also insulated from both the separator 20 and the module bracket 25.

[0071] In this embodiment, the first conductive element 43 passes through the first through hole 46, and the second conductive element 45 passes through the second through hole 47. The first conductive element 43 is insulated from both the separator 20 and the module bracket 25, and the second conductive element 45 is also insulated from both the separator 20 and the module bracket 25. This ensures that when the first conductive element 43 and the second conductive element 45 pass through the separator 20 and the module bracket 25, there is no electrical connection between the first conductive element 43 and the second conductive element 45 and the separator 20 and the module bracket 25. This avoids the risk that the high-voltage current in the battery pack will be conducted to the separator 20 and the module bracket 25, or even to the housing 10, through the first conductive element 43 and the second conductive element 45. This ensures the insulation performance of the high-voltage system of the battery pack, enabling the battery pack to meet aviation-grade safety standards.

[0072] In this embodiment, both the separator 20 and the module support bracket 25 are provided with a through hole 46 and a through hole 47 to enable the first conductive element 43 and the second conductive element 45 to bridging the battery module battery pack 30 in the first accommodating cavity 101 and the second accommodating cavity 102. This allows the battery module battery pack 30 in the upper and lower layers of the battery pack to be directly vertically connected without the need for additional wires or conductive strips to bypass and bridging, shortening the circuit link and reducing the space occupied in the cavity 100 of the battery pack. This facilitates the arrangement of more battery module battery pack 30 in the cavity 100, thereby increasing the power density of the battery pack.

[0073] In one embodiment, the first conductive element 43 is insulated from both the separator 20 and the module bracket 25, and the second conductive element 45 is also insulated from both the separator 20 and the module bracket 25. The insulation can be achieved by increasing the size of the first through hole 46 and the second through hole 47 on the separator 20 and the module bracket 25, making the distance between the first conductive element 43 and the second conductive element 45 and the walls of the first through hole 46 and the second through hole 47 sufficiently large to meet the requirements of electrical isolation; alternatively, an insulating layer can be wrapped or coated around the first conductive element 43 and the second conductive element 45 to achieve electrical isolation between the first conductive element 43 and the second conductive element 45 and the separator 20 and the module bracket 25; or the separator 20 and the module bracket 25 can be made of insulating material to achieve insulation from the first conductive element 43 and the second conductive element 45.

[0074] In one embodiment, please refer to Figure 1 and Figure 2The housing 10 has a first extension 11 and a second extension 12, both of which extend along a first direction, and are spaced apart along a second direction. A high-voltage positive connector 41 is fixed to the end of the first extension 11 near the first opening 103 and extends into the first receiving cavity 101. A high-voltage negative connector 42 is fixed to the end of the second extension 12 near the first opening 103 and extends into the first receiving cavity 101.

[0075] In this embodiment, the housing 10 has a first extension 11 and a second extension 12. The first extension 11 and the second extension 12 are determined according to the envelope shape of the leading edge region of the upper wing of the aircraft. The inner and outer contours and dimensions of the first extension 11 and the second extension 12 cannot exceed the leading edge region of the wing. In this embodiment, the first extension 11 and the second extension 12 are symmetrically arranged, and both the first extension 11 and the second extension 12 are fixedly connected by arcs at both ends. One housing 10 covers two consecutive annular battery pack arrangement areas. This is to facilitate the installation of the high-voltage assembly 40. For assembly, maintenance, and connection, the first opening end 103 of the housing 10 should maintain a certain distance from the second opening end 104 of the adjacent housing 10. That is, the ends of the first extension 11 and the second extension 12 used to install the high-voltage positive connector 41 and the high-voltage negative connector 42 should have a certain distance from the adjacent battery pack housing 10. Therefore, the first extension 11 and the second extension 12 are arranged opposite each other along the second direction, and each includes a long arc segment and a short arc segment. The high-voltage positive connector 41 and the high-voltage negative connector 42 are installed at the outer end of the short arc segment. In other words, the housing 10 is shaped like a complete annulus and a partially arc shape connected together. The partially arc shape extends from the complete annulus in a direction away from it, thus leaving space in the partially arc area for electrical connection. The arrangement of multiple arc shapes facilitates the layout and overall arrangement of electrical components.

[0076] In this embodiment, the high-voltage positive connector 41 is fixed to the end of the first extension 11 near the first opening end 103, and the high-voltage negative connector 42 is fixed to the end of the second extension 12 near the first opening end 103. The first extension 11 and the second extension 12, as part of the housing 10, provide a rigid mounting base for the high-voltage positive connector 41 and the high-voltage negative connector 42, so that the high-voltage positive connector 41 and the high-voltage negative connector 42 are stably connected to the housing 10 even under insertion and removal operations and vibration conditions. This also avoids the transmission of insertion and removal forces and vibration loads to the battery module battery pack 30 and various conductive components inside the cavity 100, thereby ensuring the overall structural integrity and functional integrity of the battery module battery pack 30 inside the battery pack, reducing the probability of failure, and improving the long-term reliability of the entire battery pack. Furthermore, the high-voltage positive connector 41 is fixed to the end of the first extension 11 near the first opening end 103, and the high-voltage negative connector 42 is fixed to the end of the second extension 12 near the first opening end 103. Since the distance between the first extension 11 and the second extension 12 near the first opening end 103 and the adjacent battery pack housing 10 is relatively large, sufficient space is provided for the installation, maintenance, and connection of the high-voltage positive connector 41 and the high-voltage negative connector 42. Simultaneously, it avoids the installation of the high-voltage positive connector 41 and the high-voltage negative connector 42 exceeding the boundary of the battery pack installation envelope in the leading edge area of ​​the aircraft's wing, thus avoiding the problem of reducing the size of the housing 10 in the second direction and consequently reducing the number of battery modules and battery packs 30 for the installation of the high-voltage positive connector 41 and the high-voltage negative connector 42.

[0077] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 5 The housing 10 also includes a connecting part 13, which is disposed between the first extension 11 and the second extension 12. Along the second direction, one end of the connecting part 13 is fixedly connected to the middle part of the first extension 11, and the other end of the connecting part 13 is fixedly connected to the middle part of the second extension 12, so that the first extension 11, the second extension 12 and the connecting part 13 together enclose and form a cavity 100.

[0078] The connecting part 13 is used to connect the first extension 11 and the second extension 12, so that the first extension 11 and the second extension 12 are fixed as a whole. According to the structure of the battery pack housing 10 and the envelope structure of the battery pack installation position, the connecting part 13 is located between the first extension 11 and the second extension 12, and is located at the connection position of two adjacent rings on the envelope. At this time, the setting of the connecting part 13 realizes the fixed connection of the first extension 11 and the second extension 12 into a whole, which facilitates the assembly and installation of the battery pack and improves the structural strength of the entire battery pack. On the other hand, the connecting part 13 will not affect the structure of the aircraft itself and will not interfere with the structure of the aircraft itself.

[0079] Furthermore, the connection part 13, together with the first extension part 11 and the second extension part 12, forms the housing 10. At this time, the cavities 100 inside the first extension part 11 and the second extension part 12 are connected through the connection part 13, so that the first extension part 11, the second extension part 12 and the connection part 13 together form the cavity 100. At this time, the first battery module battery pack 301 and the second battery module battery pack 302, which are spaced apart in the first extension part 11 and the second extension part 12, are electrically connected through the connection part 13. That is, the conductive connector 44 passes through the connection part 13 and bridging the first battery module battery pack 301 and the second battery module battery pack 302, avoiding the problem of the conductive connector 44 being exposed to the outside or needing to be bypassed.

[0080] In one embodiment, the two ends of the connecting portion 13 are welded to the first extension portion 11 and the second extension portion 12, respectively.

[0081] In one embodiment, the connecting portion 13 is integrally cast with the first extension portion 11 and the second extension portion 12.

[0082] In one embodiment, the areas of the first extension 11 and the second extension 12 that avoid the connecting portion 13 form a first opening end 103 and a second opening end 104. Along the second direction, the distance between the first opening end 103 and the second opening end 104 is greater than the distance between the second opening end 104. That is, the two ends of the housing 10 are the first opening end 103 and the second opening end 104, respectively. This arrangement is adapted to the envelope structure of the battery pack arrangement position on the aircraft. The second opening end 104 is located at the connection position of two adjacent rings on the envelope. The distance between the first opening end 103 and the second opening end 104 is greater than the distance between the first opening end 103 and the second opening end 104. This extends the length of the first extension 11 and the second extension 12, increases the volume of the cavity 100 of the housing 10, increases the space for arranging the battery module battery pack 30, and increases the power of the battery pack to meet the power demand of the aircraft.

[0083] In one embodiment, a connecting beam 105 is provided at the second opening end 104. The two ends of the connecting beam 105 are respectively fixedly connected to the ends of the first extension 11 and the second extension 12, thereby further fixing the first extension 11 and the second extension 12 into a whole, increasing the rigidity and strength of the battery pack. At the same time, the connecting beam 105 or the location of the connecting beam 105 can also be used to fix and install thermal management components, such as coolant inlet and outlet pipes, facilitating the layout of the battery pack thermal management components.

[0084] In one embodiment, the conductive connector 44 is sequentially disposed through the first extension 11, the connecting portion 13, and the second extension 12 and located within the second accommodating cavity 102. It is positioned along the first direction near the first opening end 103. The conductive connector 44 passes through the connecting portion 13, bridging the first battery module battery pack 301 and the second battery module battery pack 302, thus avoiding the problem of the conductive connector 44 being exposed externally or requiring detours. The conductive connector 44's position along the first direction near the first opening end 103 reduces the space occupied by the conductive connector 44 within the connecting portion 13, facilitating the utilization of the space within the connecting portion 13.

[0085] In one embodiment, the battery pack further includes a low-voltage component 50, which includes a first terminal block 51, a second terminal block 52, a first battery management module 53, and a second battery management module 54.

[0086] The first terminal 51 is mounted on the first extension 11 and extends into the first receiving cavity 101, and the second terminal 52 is mounted on the second extension 12 and extends into the first receiving cavity 101. The first terminal 51 and the second terminal 52 are both located on the same side of the first opening end 103.

[0087] The first battery management module 53 is installed in the connecting part 13 and located in the first accommodating cavity 101, and is positioned close to the first battery module battery pack 301. The second battery management module 54 is installed in the connecting part 13 and located in the first accommodating cavity 101, and is positioned close to the second battery module battery pack 302.

[0088] The first terminal 51 is electrically connected to the first battery management module 53 via a wiring harness, and the second terminal 52 is electrically connected to the second battery management module 54 via a wiring harness.

[0089] In this embodiment, the end of the connecting part 13 is transitionally connected to the connection position of the first extension part 11 and the second extension part 12. This creates a small accommodating cavity at the connection position of the connecting part 13 and the first extension part 11 and the second extension part 12. The first battery management module 53 and the second battery management module 54 are respectively placed in these two accommodating areas, which realizes the rational and full utilization of the fragment space inside the battery pack. Under the premise of minimizing the occupation of the battery module battery pack 30 arrangement area, the first battery management module 53 and the second battery management module 54 are reasonably installed.

[0090] In this embodiment, the first battery management module 53 is installed in the connecting part 13 and located in the first accommodating cavity 101, and is positioned close to the first battery module battery pack 301. The second battery management module 54 is installed in the connecting part 13 and located in the first accommodating cavity 101, and is positioned close to the second battery module battery pack 302. Because the accommodating area formed by the connection between the end of the connecting part 13 and the first extension part 11 or the second extension part 12 is too small, it is difficult to accommodate the battery management modules of the entire battery pack. Therefore, the battery management modules of the entire battery pack are divided, and corresponding battery management modules are set for the first battery module battery pack 301 and the second battery module battery pack 302, and are set in close proximity to shorten the length of the wire, reduce wire bending or space crossing, and improve connection reliability.

[0091] In this embodiment, the first terminal 51 is mounted on the first extension 11 and extends into the first accommodating cavity 101, and the second terminal 52 is mounted on the second extension 12 and extends into the first accommodating cavity 101. The first terminal 51 and the second terminal 52 are both located on the same side of the first opening end 103. This arrangement is suitable for the fixed interface of the entire aircraft and facilitates the installation, maintenance and connection of the first terminal 51 and the second terminal 52.

[0092] In one embodiment, the housing 10 is an insulating housing 10, making the housing 10 itself an insulator for the entire battery pack. When leakage or short circuit occurs in the battery modules, battery packs 30, and high-voltage system inside the battery pack due to reasons such as insulation layer damage, loose connections, creepage, or foreign object intrusion, the leakage current cannot be conducted to the outside through the outer wall of the housing 10 because the housing 10 itself is non-conductive. This effectively prevents electric shock accidents when operators, maintenance personnel, or other metal structural components of the aircraft come into contact with the surface of the housing 10, significantly improving the electrical safety of the entire battery pack.

[0093] In one embodiment, the housing 10 is made of an insulating material, such as engineering plastics, SMC (sheet molding compound), PCM (precast integral molding compound), or carbon fiber / glass fiber reinforced composite material.

[0094] In one embodiment, the outer and / or inner surfaces of the enclosure 10 are coated with an insulating material to achieve insulation of the enclosure 10.

[0095] An electrical device includes the aforementioned battery pack. The battery pack is designed according to the battery pack arrangement position on the electrical device. The external outline of the battery pack and the arrangement of the internal battery modules 30 and the high-voltage components 40 on the battery pack are all adapted to the electrical device. This ensures that while ensuring the energy density of the battery pack, it also avoids spatial conflicts and reliably achieves the same-side lead-out of the high-voltage circuit to meet the requirements and settings of the overall circuit connection of the electrical device.

[0096] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A battery pack, characterized in that, include: A box body, the box body including a cavity, having a first open end along a first direction, the first direction being the length direction of the box body; A battery module assembly is disposed within the cavity. The battery module assembly includes a first battery module assembly and a second battery module assembly, which are spaced apart along a second direction. The first battery module assembly has a total positive output terminal on the side near the first opening end along the first direction. The second battery module assembly has a total negative output terminal on the side near the first opening end along the first direction. The second direction is the width direction of the housing. The high-voltage assembly includes a high-voltage positive connector, a high-voltage negative connector, and a conductive connector. The high-voltage positive connector and the high-voltage negative connector are both fixed to the housing and located on the same side of the first opening end. The high-voltage positive connector is electrically connected to the total positive output terminal, and the high-voltage negative connector is electrically connected to the total negative output terminal. The first battery module and the second battery module are also electrically connected through the conductive connector.

2. The battery pack according to claim 1, characterized in that, It also includes a separator and two module brackets. The separator is placed inside the housing and, along a third direction, divides the cavity into a first receiving cavity and a second receiving cavity that are arranged opposite to each other. The two module brackets are respectively located in the first receiving cavity and the second receiving cavity and are fitted to both sides of the separator along the third direction. The module brackets are configured to limit the installation of the battery module battery pack. The third direction is the height direction of the housing. Both the first accommodating cavity and the second accommodating cavity are provided with the first battery module battery pack and the second battery module battery pack, and the two first battery module battery packs are arranged opposite each other along the third direction, and the two second battery module battery packs are arranged opposite each other along the third direction.

3. The battery pack according to claim 2, characterized in that, The high-voltage assembly also includes a first conductive element, a second conductive element, a first connecting bar, and a second connecting bar; The first conductive element is electrically connected between the two first battery module battery packs. The total positive output terminal is located on the first battery module battery pack installed in the first accommodating cavity and avoids the first conductive element. The total positive output terminal is electrically connected to the high voltage positive connector through the first connecting bar. The two second battery module battery packs are electrically connected by the second conductive element. The total negative output terminal is located on the second battery module battery pack installed in the first accommodating cavity and avoids the second conductive element. The total negative output terminal is electrically connected to the high voltage negative terminal connector through the second connecting bar. The conductive connector is located in the second accommodating cavity and bridges the first battery module battery pack and the second battery module battery pack that are spaced apart in the second accommodating cavity. Both the first conductive member and the second conductive member extend along the third direction and pass through the separator and the module bracket to achieve the bridging.

4. The battery pack according to claim 3, characterized in that, Both the separator and the module bracket are provided with a first through hole and a second through hole. The first conductive element passes through the first through hole, and its two ends are respectively located in the first accommodating cavity and the second accommodating cavity. The second conductive element passes through the second through hole, and its two ends are respectively located in the first accommodating cavity and the second accommodating cavity. The first conductive element is insulated from both the separator and the module bracket, and the second conductive element is insulated from both the separator and the module bracket.

5. The battery pack according to claim 2, characterized in that, The housing has a first extension and a second extension, both of which extend along the first direction and are spaced apart along the second direction. The high-voltage positive connector is fixed to the end of the first extension near the first opening and extends into the first accommodating cavity. The high-voltage negative connector is fixed to the end of the second extension near the first opening and extends into the first accommodating cavity.

6. The battery pack according to claim 5, characterized in that, The housing also includes a connecting portion disposed between the first extension portion and the second extension portion. Along the second direction, one end of the connecting portion is fixedly connected to the middle part of the first extension portion, and the other end of the connecting portion is fixedly connected to the middle part of the second extension portion, so that the first extension portion, the second extension portion, and the connecting portion together enclose and form the cavity.

7. The battery pack according to claim 6, characterized in that, The first extension and the second extension avoid the area of ​​the connecting portion to form the first opening end and the second opening end, and along the second direction, the distance between the first opening end and the second opening end is greater than the distance between the second opening end. The conductive connector is sequentially inserted through the first extension, the connecting portion, and the second extension and is located within the second accommodating cavity, and is positioned on the side closest to the first opening end along the first direction.

8. The battery pack according to claim 7, characterized in that, It also includes a low-voltage component, which includes a first terminal block, a second terminal block, a first battery management module, and a second battery management module. The first terminal is mounted on the first extension and extends into the first receiving cavity, the second terminal is mounted on the second extension and extends into the first receiving cavity, and both the first terminal and the second terminal are located on the same side of the first opening end; The first battery management module is installed in the connecting part and located in the first accommodating cavity, and is positioned close to the battery pack of the first battery module. The second battery management module is installed in the connecting part and located in the first accommodating cavity, and is positioned close to the battery pack of the second battery module. The first terminal block is electrically connected to the first battery management module via a wiring harness, and the second terminal block is electrically connected to the second battery management module via a wiring harness.

9. The battery pack according to claim 1, characterized in that, The enclosure is an insulated enclosure.

10. An electrical device, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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