Battery pack and electric device

Abstract

This application discloses a battery pack and electrical device. The battery pack includes a housing, a first battery module, a second battery module, a battery control system, a first output interface, a second output interface, and two conductive components. The housing includes an outer frame, reinforcing longitudinal beams, and a separating beam. The outer frame includes a first side frame and a second side frame facing each other. A first output interface is fixed on the first side frame, and a second output interface is fixed on the second side frame. The first battery module and the second battery module are disposed on both sides of the reinforcing longitudinal beams. The battery control system is electrically connected to the first battery module and the second battery module respectively. The second output interface is connected to the battery control system through two conductive components, both of which are arranged above the reinforcing longitudinal beams. This application mainly solves the problem that existing battery packs with two opposing output interfaces suffer from limited energy density and low safety because the two conductive components are arranged between the battery module and the side frame of the housing.

Description

Technical Field

[0001] This utility model relates to the technical field of battery packs, and more particularly to a battery pack and electrical equipment. Background Technology

[0002] In recent years, the emergence of new energy vehicles has played a significant role in promoting social development and environmental protection. Power battery packs, as rechargeable batteries, are the power source for new energy vehicles and are widely used in this field. Currently, some battery packs have output interfaces on opposite sides to meet the needs of four-wheel-drive new energy sports cars or racing cars. Specifically, the battery pack contains battery modules and a battery control system. The battery control system acts as a bridge between the battery modules and external electrical appliances, controlling the discharge of the battery modules. It also acts as a bridge between the battery modules and an external power source, controlling the charging of the battery modules. One output interface is close to the battery control system and connected by a short copper busbar, while the other output interface requires two conductive components (these two conductive components are usually of high quality). The selected copper busbar spans a considerable distance to connect with the battery control system. Currently, both conductive components are located in the gap between the battery module and the frame of the housing. In other words, the current battery pack housing frame and battery module require a lot of space to accommodate the two conductive components. On the one hand, this structure results in low space utilization of the battery pack, limiting the energy density of the battery pack within its limited dimensions. On the other hand, when the battery pack vibrates, the two conductive components are prone to contact with the housing, causing the housing to become energized or even short-circuiting, thus posing certain safety hazards. Therefore, improvements to the existing technology are needed.

[0003] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0004] This utility model provides a battery pack and electrical equipment, which mainly solves the technical problem that the energy density of existing battery packs with two relatively arranged output interfaces is limited and the safety is low because the two conductive components are arranged between the battery module and the frame of the box.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A battery pack includes a housing, a first battery module, a second battery module, a battery control system, a first output interface, a second output interface, and two conductive components.

[0007] The enclosure includes an outer frame and reinforcing longitudinal beams and isolation beams connected inside the outer frame. The first output interface and the second output interface are respectively located on the two opposite outer walls of the outer frame along the X direction. The isolation beams are connected between the two opposite inner walls of the outer frame along the Y direction to divide the internal space of the outer frame into an electrical area and a battery area spaced apart along the X direction. The reinforcing longitudinal beams are connected between the isolation beams and the inner wall of the outer frame on one side opposite to the isolation beams to divide the internal space of the battery area into a first area and a second area spaced apart along the Y direction. The first battery module is housed in the first area, and the second battery module is housed in the second area. The height of the first battery module and the second battery module is higher than the reinforcing longitudinal beams to leave a gap between the first battery module and the second battery module.

[0008] The battery control system is arranged in the electrical area and is electrically connected to the first battery module and the second battery module respectively, and is also electrically connected to the first output interface and the second output interface respectively. The second output interface is connected to the battery control system through two conductive components. The two conductive components are embedded in the gap above the reinforcing longitudinal beam, and the reinforcing longitudinal beam is insulated from the conductive components.

[0009] In one technical solution, a connector that crosses the conductive element connects the first battery module and the second battery module, the connector connecting the first battery module and the second battery module in series. The first battery module has a first output terminal, and the second battery module has a second output terminal. The polarity of the first output terminal and the polarity of the second output terminal are opposite, and the first output terminal and the second output terminal are located on the same side close to the battery control system. The battery control system is connected to the first output terminal and the second output terminal respectively.

[0010] In one of the technical solutions, the battery pack further includes a liquid-cooled top plate, which is disposed on the side close to the output poles of the first battery module and the second battery module and exchanges heat with them.

[0011] In one of the technical solutions, the connector and the first output electrode are located at diagonal positions of the first battery module, and the connector and the second output electrode are also located at diagonal positions of the second battery module.

[0012] In one of the technical solutions, the first battery module includes P rows of first battery packs arranged sequentially along the X direction. Each row of first battery packs includes M first battery modules arranged sequentially and connected in series along the Y direction. Adjacent rows of first battery packs are connected in series with each other by a first connecting element.

[0013] The second battery module includes Q rows of second battery packs arranged sequentially along the X direction. Each row of the second battery pack includes N second battery modules arranged sequentially and connected in series along the Y direction. Adjacent rows of the second battery packs are connected in series with each other by a connecting second series member.

[0014] In one of the technical solutions, M, N, P, and Q are all positive integers greater than 0 and are all odd numbers.

[0015] In one of the technical solutions, P is equal to Q, and the first battery module or the second battery module includes at least two battery cells connected in parallel.

[0016] In one technical solution, the battery pack further includes an inlet pipe and an outlet pipe. An inlet port and an outlet port are provided on the outer wall of the outer frame opposite to the isolation beam. The inlet pipe is connected to the inlet port, and the outlet pipe is connected to the outlet port. A reinforcing beam protrudes from the inner bottom surface of the housing near the inner sidewall of the outer frame opposite to the isolation beam. A first clearance notch, a second clearance notch, and a third clearance notch are provided on the reinforcing beam. The first clearance notch corresponds to the second output port, the second clearance notch corresponds to the inlet port, and the third clearance notch corresponds to the outlet port. The ends of the two conductive components away from the battery control system are housed in the first clearance notch, the inlet pipe is housed in the second clearance notch, and the outlet pipe is housed in the third clearance notch.

[0017] In one technical solution, the battery pack further includes a liquid-cooled base plate, which is connected to the outer frame to form the inner bottom surface of the housing and exchanges heat with the bottom surfaces of the first battery module and the second battery module respectively. The reinforcing beam has a through first hole at the bottom of the second clearance notch, and the reinforcing beam has a through second hole at the bottom of the third clearance notch. The liquid inlet pipe passes through the first hole and is connected to the liquid-cooled base plate, and the liquid outlet pipe passes through the second hole and is connected to the liquid-cooled base plate.

[0018] In one of the technical solutions, multiple through-hole pressure relief holes are provided on the liquid-cooled top plate, and the battery pack also includes a cover, which is connected to the top of the outer frame and covers the liquid-cooled top plate.

[0019] An electrical device includes the battery pack described in the above technical solution.

[0020] Compared with the prior art, the battery pack provided by this utility model has at least the following beneficial effects:

[0021] This solution improves the structural strength of the battery pack by incorporating reinforcing longitudinal beams within the pack body, reducing the risk of deformation and thus enhancing battery pack safety. Furthermore, by placing the two existing conductive components connected to the second output interface above the reinforcing longitudinal beams, this solution eliminates the need for pre-reserved space between the outer frame and the first / second battery module to accommodate these components. In fact, the outer frame can directly abut against the first / second battery module, improving space utilization within the battery pack and consequently increasing its total capacity and energy density. This also resolves the issue of traditional conductive components easily contacting the inner wall of the outer frame, further enhancing battery safety. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0024] Figure 2 for Figure 1 The diagram shown is an exploded view of the battery pack.

[0025] Figure 3 for Figure 1 The battery pack shown is a top view behind the concealed case cover and liquid cooling top plate;

[0026] Figure 4 This is a schematic diagram of the structure of the first battery module and the second battery module provided in the embodiments of this application;

[0027] Figure 5 for Figure 3 The diagram shown illustrates the structure of the battery pack after further concealing the first and second battery modules.

[0028] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0029] Figure 7 for Figure 5 A magnified view of a section at point B in the middle;

[0030] Figure 8 for Figure 5 A magnified view of a section at point C;

[0031] Figure 9This is a schematic diagram of the structure of the box cover provided in an embodiment of this application.

[0032] Figure label:

[0033] 1. Housing; 11. Outer frame; 111. First side frame; 112. Second side frame; 12. Reinforcing longitudinal beam; 13. First area; 14. Second area; 15. Reinforcing crossbeam; 16. Electrical area; 17. Reinforcing protruding beam; 171. First clearance notch; 172. Second clearance notch; 173. Third clearance notch; 174. First through hole; 175. Second through hole; 18. Isolation beam; 19. Battery area;

[0034] 2. First battery module; 20. First battery pack; 21. First output terminal; 22. First battery module; 23. First series connection; 3. Second battery module; 30. Second battery pack; 31. Second output terminal; 32. Second battery module; 33. Second series connection; 34. Single battery cell;

[0035] 4. Battery control system; 5. First output interface; 6. Second output interface; 7. Conductive component; 8. Connector; 9. Liquid cooling top plate; 91. Pressure relief hole;

[0036] 40. Liquid inlet pipe; 50. Liquid outlet pipe; 60. Liquid inlet interface; 70. Liquid outlet interface; 80. Liquid cooling base plate; 90. Cover; 100. Bottom protective plate; 200. Buffer foam; 300. Sealing gasket; 400. Thermal pad. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0038] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0039] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] Please refer to the following: Figure 1 , Figure 2 and Figures 5 to 7This utility model embodiment provides a battery pack, mainly including a housing 1, a first battery module 2, a second battery module 3, a battery control system 4, a first output interface 5, a second output interface 6, and two conductive components 7. The housing 1 includes an outer frame 11 and reinforcing longitudinal beams 12 and isolation beams 18 respectively connected inside the outer frame 11. The first output interface 5 and the second output interface 6 are respectively disposed on the opposite outer walls of the outer frame 11 along the X direction. Specifically, the outer frame 11 includes a first side frame 111 and a second side frame 112 disposed opposite to each other along the X direction. The first output interface 5 is equivalent to being fixed on the outer wall of the first side frame 111, and the second output interface 6 is equivalent to being fixed on the outer wall of the second side frame 112. The isolation beam 18 connects the inner walls of the outer frame 11 on opposite sides along the Y direction, dividing the internal space of the outer frame 11 into an electrical area 16 and a battery area 19 spaced apart along the X direction. One end of the reinforcing longitudinal beam 12 is connected to the isolation beam 18, and the other end of the reinforcing longitudinal beam 12 is connected to the inner wall of the outer frame 11 on the opposite side of the isolation beam 18 (i.e., the other end of the reinforcing longitudinal beam 12 is connected to the second frame 112). The reinforcing longitudinal beam 12 can improve the overall rigidity of the housing 1, reduce the risk of deformation of the housing 1, and improve the safety of the battery pack. In addition, the reinforcing longitudinal beam 12 divides the internal space of the battery area 19 into a first area 13 and a second area 14. The first battery module 2 is housed in the first area 13, and the second battery module 3 is housed in the second area 14. The height of the first battery module 2 and the second battery module 3 are both higher than the reinforcing longitudinal beam 12, so that there is a gap between the first battery module 2 and the second battery module 3. Preferably, a plurality of reinforcing crossbeams 15 are provided in both the first region 13 and the second region 14. The reinforcing crossbeams 15 extend along the Y direction and are respectively connected to the outer frame 11 and the reinforcing longitudinal beams 12 to further improve the strength of the housing 1. More preferably, the inner sidewall of the outer frame 11, the sidewall of the reinforcing longitudinal beams 12 and the sidewall of the reinforcing crossbeams 15 can be used to abut against the side of the battery module to improve the integration of the battery module, thereby improving the total capacity and energy density of the battery pack.More specifically, the aforementioned electrical area 16 is used to house the battery control system 4. The battery control system 4 is electrically connected to the first battery module 2 and the second battery module 3, respectively, and is also electrically connected to the first output interface 5 and the second output interface 6, respectively. It can be understood that the battery control system 4 acts as a bridge between the battery module and external electrical appliances, and also as a bridge between the battery module and an external power source. The battery control system 4 can collect data information (such as temperature information, voltage information, or current information) from the first battery module 2 and the second battery module 3, and control the first battery module 2 and the second battery module 3 based on the collected data information. During the charging and discharging process of battery module 3, external electrical appliances can obtain electrical energy by connecting to the first output interface 5 or the second output interface 6. Since the second output interface 6 is far from the battery control system 4, the second output interface 6 is connected to the battery control system 4 through two conductive parts 7 extending in the X direction. Both conductive parts 7 are arranged in the gap above the reinforcing longitudinal beam 12. Most of the two conductive parts 7 are preferably copper busbars with an insulating layer wrapped on the outer wall to prevent the reinforcing longitudinal beam 12 from becoming energized, ensuring the safety of the housing 1, reducing the risk of short circuit in the battery pack, and the conductive parts 7 can abut against the reinforcing longitudinal beam 12 to improve the stability of the conductive parts 7 in the gap. By arranging the positions of the two existing conductive components 7 in this way, no space needs to be reserved between the outer frame 11 and the first battery module 2 / second battery module 3 to accommodate the two conductive components 7. In fact, the outer frame 11 can directly abut against the first battery module 2 / second battery module 3, thereby improving the space utilization rate within the battery pack. This is beneficial for increasing the total capacity and energy density of the battery pack. It also solves the problem of the two conductive components 7 easily contacting the inner wall of the outer frame 11, thus further improving the safety of the battery pack. To further enhance the safety of the battery pack, an insulating layer can be provided on the outer surface of the reinforcing longitudinal beam 12. This insulating layer can be provided by applying insulating varnish.

[0043] Please refer to the following: Figures 2 to 4In this embodiment, the first battery module 2 and the second battery module 3 are preferably connected in series by a connector 8. The connector 8 needs to cross the aforementioned conductive element 7. In other words, the first battery module 2 needs to lead out a first output electrode 21, and the second battery module 3 needs to lead out a second output electrode 31. Of the first output electrode 21 and the second output electrode 31, one is the overall positive electrode and the other is the overall negative electrode. The first output electrode 21 and the second output electrode 31 are both located on the same side close to the battery control system 4 and are led out into the electrical area 16. The first output electrode 21 and the second output electrode 31 are also respectively connected to the battery control system 4, so that the battery control system 4 can control the charging and discharging process of the first battery module 2 and the second battery module 3. Preferably, the battery pack further includes a liquid-cooled top plate 9, which is fixedly connected to the housing 1 and exchanges heat with the top surface of the first battery module 2 and the top surface of the second battery module 3 respectively. In order to ensure that the two conductive parts 7 do not hinder the installation of the liquid-cooled top plate 9 and do not come into contact with the liquid-cooled top plate 9, this solution preferably designs the two conductive parts 7 to be lower than the connecting parts 8 when extending along the X direction.

[0044] Please refer to the following: Figure 3 and Figure 4In this embodiment, the connector 8 and the first output pole 21 are preferably designed to be distributed diagonally on the first battery module 2. At the same time, the connector 8 and the second output pole 31 are designed to be distributed diagonally on the second battery module 3. With this design, the first output pole 21 and the second output pole 31, which serve as the total output poles, are far apart, which improves the safety of the battery pack during charging and discharging. Specifically, the first battery module 2 preferably includes P rows of first battery packs 20 arranged sequentially along the X direction. Each row of first battery packs 20 includes M first battery modules 22 arranged sequentially and connected in series along the Y direction. Adjacent rows of first battery packs 20 are connected in series with each other through a first connecting member 23. Similarly, the second battery module 3 preferably includes Q rows of second battery packs 30 arranged sequentially along the X direction. Each row of second battery packs 30 includes N second battery modules 32 arranged sequentially and connected in series along the Y direction. Adjacent rows of second battery packs 30 are connected in series with each other through a second connecting member 33. The first battery module 2 and the second battery module 3 with this structural design have a simpler and more concise structure when realizing internal series connection, and are easier to assemble and maintain. More specifically, based on the specific structures of the first battery module 2 and the second battery module 3 described above, and assuming that the connector 8 must be arranged diagonally, the values ​​of M and N must be odd. Only when the values ​​of M and N are odd can the rows of first battery packs 20 be connected in series sequentially along the positive X direction via the first series connector 23, and the rows of second battery packs 30 be connected in series sequentially along the opposite X direction via the second series connector 33. Furthermore, the values ​​of P and Q also need to be designed to be odd to ensure that the first output pole 21 and the second output pole 31 are distributed at relatively far ends. If the values ​​of P and Q are both even, the first output pole 21 and the second output pole 31 will move closer to the center and eventually be adjacent to each other, preventing the connector 8 from being arranged diagonally relative to the first output pole 21, and also preventing the connector 8 from being arranged diagonally relative to the second output pole 31. Of course, M, N, P, and Q are all positive integers greater than 0.

[0045] In this preferred embodiment, the value of M is 13, the value of N is 3, and the first battery module 22 inside the first battery module 2 and the second battery module 32 inside the second battery module 3 are preferably the same. Therefore, the external dimensions of the first battery module 22 and the second battery module 32 are the same, and thus the values ​​of P and Q are preferably equal, specifically preferably 7. Figure 4 As shown, both the first battery module 22 and the second battery module 32 preferably include at least two battery cells 34 connected in parallel. In other words, each row of the first battery pack 20 has 26 battery cells 34 arranged along the Y direction, and each row of the second battery pack 30 has 6 battery cells 34 arranged along the Y direction. In other embodiments, the first battery module 22 and the second battery module 32 may each consist of only one battery cell 34.

[0046] Please refer to the following: Figure 1 , Figure 2 and Figures 5 to 8 The battery pack also includes an inlet pipe 40 and an outlet pipe 50. An inlet port 60 and an outlet port 70 are fixed on the second frame 112. The inlet pipe 40 is connected to the inlet port 60, and the outlet pipe 50 is connected to the outlet port 70. A reinforcing beam 17 protrudes from the inner wall of the second frame 112, further improving the structural strength of the housing 1. The reinforcing beam 17 has a first clearance notch 171, a second clearance notch 172, and a third clearance notch 173. The first clearance notch 171 corresponds to the second output port 6, and the second clearance notch 172 corresponds to the inlet port. 60, the third clearance notch 173 corresponds to the liquid outlet interface 70, the ends of the two conductive parts 7 away from the battery control system 4 are housed in the first clearance notch 171, the liquid inlet pipe 40 is housed in the second clearance notch 172, and the liquid outlet pipe 50 is housed in the third clearance notch 173. With this design, based on the premise that the battery pack has a liquid cooling function, the space utilization rate inside the battery pack can be improved. At the same time, the existing electrical area 16 used to house the battery control system 4 can be made smaller, which is conducive to freeing up more space to arrange the battery modules, that is, it is conducive to improving the total capacity and energy density of the battery pack.

[0047] Please refer to the following: Figure 2 , Figure 5 , Figure 7 and Figure 8 In addition to the liquid-cooled top plate 9, the battery pack also includes a liquid-cooled bottom plate 80. The liquid-cooled bottom plate 80 is connected to the outer frame 11 to form the inner bottom surface of the housing 1. The liquid-cooled bottom plate 80 is located below the reinforcing beam 17 and is also located below the first battery module 2 and the second battery module 3. The liquid-cooled bottom plate 80 is used to cool the bottom surface of the first battery module 2 and the bottom surface of the second battery module 3 to ensure that the first battery module 2 and the second battery module 3 can operate within a suitable temperature range. Specifically, the bottom of the aforementioned second clearance notch 172 is provided with a downward penetrating first through hole 174, which is used to supply the liquid inlet pipe 40 to connect downward to the liquid cooling base plate 80. The bottom of the aforementioned third clearance notch 173 is provided with a downward penetrating second through hole 175, which is used to supply the liquid outlet pipe 50 to connect downward to the liquid cooling base plate 80. By further opening holes on the reinforcing beam 17, the space utilization rate inside the battery pack can be improved while meeting the cooling requirements of the first battery module 2 and the second battery module 3, thereby helping to improve the total capacity and energy density of the battery pack.

[0048] Please refer to the following: Figure 1 , Figure 2 and Figure 9The liquid-cooled top plate 9 has multiple through-hole pressure relief holes 91 to ensure that both the first battery module 2 and the second battery module 3 can release pressure in time during thermal runaway, improving the safety of the battery pack. Since the liquid-cooled top plate 9 is not strong enough to function as a cover due to the pressure relief holes 91, this embodiment also provides a separate cover 90 for the battery pack. The cover 90 is connected to the top of the outer frame 11 and covers the liquid-cooled top plate 9 to protect it and reduce the risk of coolant leakage when the battery pack is impacted, thereby improving the safety of the battery pack. The cover 90 is preferably made of lightweight PCM to ensure that the total weight of the battery pack is within a suitable range. Furthermore, this solution also provides a mica plate on the inner surface of the cover 90 facing the liquid-cooled top plate 9. Because the mica plate has good flame retardancy, it can reduce the risk of the battery pack burning through the cover 90 due to thermal runaway, effectively preventing the internal flame of the battery pack from spreading outward, thus further improving the safety of the battery pack during use.

[0049] Please see Figure 2 Preferably, thermal pads 400 are provided between the first battery module 2 and the liquid-cooled top plate 9, and between the second battery module 3 and the liquid-cooled top plate 9. The thermal pads 400 ensure that the liquid-cooled top plate 9 can exchange heat with the top surfaces of each individual battery cell 34 in both the first battery module 2 and the second battery module 3, ensuring that each individual battery cell 34 can be cooled by the liquid-cooled top plate 9, thus improving the safety of the battery pack. In addition, a buffer foam 200 is provided between the liquid-cooled top plate 9 and the cover 90. The buffer foam 200 plays a role in vibration damping, reducing the risk of damage and leakage to the liquid-cooled top plate 9 when the cover 90 is subjected to vibration or impact, thereby improving the safety performance of the battery pack. At the same time, the buffer foam 200 here also supports the mica plate on the inner wall of the cover 90, preventing the mica plate from falling off due to poor adhesion.

[0050] Please refer to the following: Figure 1 and Figure 2 The battery pack in this embodiment also includes a bottom protective plate 100, which is a stamped part with good rigidity. The bottom protective plate 100 is connected to the bottom of the outer frame 11 and is located below the liquid-cooled base plate 80 to cover the liquid-cooled base plate 80. The bottom protective plate 100 plays a role in protecting the liquid-cooled base plate 80. In order to improve the protection performance of the bottom protective plate 100 for the liquid-cooled base plate 80 under vibration conditions, a buffer foam 200 is also provided between the bottom protective plate 100 and the liquid-cooled base plate 80. An annular sealing gasket 300 is also sandwiched between the outer edge of the bottom protective plate 100 and the liquid-cooled base plate 80. The sealing gasket 300 can seal the gap between the bottom protective plate 100 and the liquid-cooled base plate 80, reducing the risk of coolant leakage from the liquid-cooled base plate 80.

[0051] This embodiment also provides an electrical device that includes the aforementioned battery pack. Therefore, this electrical device also has the advantages of large power capacity, high energy density, and high safety.

[0052] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A battery pack, characterized by, It includes a housing (1), a first battery module (2), a second battery module (3), a battery control system (4), a first output interface (5), a second output interface (6), and two conductive components (7). The enclosure (1) includes an outer frame (11) and reinforcing longitudinal beams (12) and isolation beams (18) connected inside the outer frame (11). The first output interface (5) and the second output interface (6) are respectively located on the opposite outer walls of the outer frame (11) along the X direction. The isolation beams (18) are connected between the opposite inner walls of the outer frame (11) along the Y direction to divide the internal space of the outer frame (11) into electrical areas (16) and battery areas (19) spaced apart along the X direction. The reinforcing longitudinal beams (12) are connected to the isolation beams (18). Between the inner wall of the outer frame (11) opposite to the isolation beam (18), the internal space of the battery area (19) is divided into a first area (13) and a second area (14) spaced apart along the Y direction. The first battery module (2) is housed in the first area (13), and the second battery module (3) is housed in the second area (14). The height of the first battery module (2) and the second battery module (3) is higher than that of the reinforcing longitudinal beam (12) so that there is a gap between the first battery module (2) and the second battery module (3). The battery control system (4) is arranged in the electrical area (16) and is electrically connected to the first battery module (2) and the second battery module (3) respectively, and is electrically connected to the first output interface (5) and the second output interface (6) respectively. The second output interface (6) is connected to the battery control system (4) through two conductive parts (7). The two conductive parts (7) are embedded in the gap above the reinforcing longitudinal beam (12). The reinforcing longitudinal beam (12) is insulated from the conductive parts (7).

2. The battery pack of claim 1, wherein, A connector (8) that crosses the conductive element (7) connects the first battery module (2) and the second battery module (3) in series. The connector (8) connects the first battery module (2) and the second battery module (3) in series. The first battery module (2) has a first output terminal (21) and the second battery module (3) has a second output terminal (31). The polarity of the first output terminal (21) and the polarity of the second output terminal (31) are opposite. The first output terminal (21) and the second output terminal (31) are located on the same side close to the battery control system (4). The battery control system (4) is connected to the first output terminal (21) and the second output terminal (31) respectively.

3. The battery pack as described in claim 2, characterized in that, The battery pack also includes a liquid-cooled top plate (9), which is located on one side near the output poles of the first battery module (2) and the second battery module (3) and exchanges heat with them.

4. The battery pack of claim 2, wherein, The first battery module (2) includes P rows of first battery packs (20) arranged sequentially along the X direction. Each row of first battery packs (20) includes M first battery modules (22) arranged sequentially along the Y direction and connected in series. Adjacent rows of first battery packs (20) are connected in series with each other by connecting first connecting members (23). The second battery module (3) includes Q rows of second battery packs (30) arranged sequentially along the X direction. Each row of second battery packs (30) includes N second battery modules (32) arranged sequentially and connected in series along the Y direction. Adjacent rows of second battery packs (30) are connected in series with each other by connecting second series members (33).

5. The battery pack of claim 4, wherein, M, N, P, and Q are all positive integers greater than 0 and are all odd numbers.

6. The battery pack of claim 5, wherein, The P is equal to the Q, and the first battery module (22) or the second battery module (32) includes at least two battery cells (34) connected in parallel.

7. The battery pack of claim 1, wherein, The battery pack also includes an inlet pipe (40) and an outlet pipe (50). The outer wall of the outer frame (11) opposite to the isolation beam (18) is provided with an inlet port (60) and an outlet port (70). The inlet pipe (40) and the inlet port (60) are connected, and the outlet pipe (50) and the outlet port (70) are connected. A reinforcing beam (17) is provided on the inner bottom surface of the housing (1) and on the inner side wall opposite to the outer frame (11) and the isolation beam (18). The reinforcing beam (17) has a first clearance notch (171), a second clearance notch (172) and a third clearance notch (173). The first clearance notch (171) corresponds to the second output interface (6), the second clearance notch (172) corresponds to the liquid inlet interface (60), and the third clearance notch (173) corresponds to the liquid outlet interface (70). The ends of the two conductive components (7) away from the battery control system (4) are housed in the first clearance notch (171), the liquid inlet pipe (40) is housed in the second clearance notch (172), and the liquid outlet pipe (50) is housed in the third clearance notch (173).

8. The battery pack of claim 7, wherein, The battery pack also includes a liquid-cooled base plate (80), which is connected to the outer frame (11) to form the inner bottom surface of the housing (1) and exchange heat with the first battery module (2) and the second battery module (3) respectively. The reinforcing beam (17) has a through hole (174) at the second clearance notch (172) and a through hole (175) at the third clearance notch (173). The liquid inlet pipe (40) passes through the first through hole (174) and is connected to the liquid-cooled base plate (80). The liquid outlet pipe (50) passes through the second through hole (175) and is connected to the liquid-cooled base plate (80).

9. The battery pack of claim 3, wherein, The liquid-cooled top plate (9) has multiple through pressure relief holes (91), and the battery pack also includes a cover (90), which is connected to the outer frame (11) and covers the liquid-cooled top plate (9).

10. An electric device, characterized by Includes the battery pack as described in any one of claims 1-9.

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