Battery pack and electric device

Abstract

A battery pack and an electric device. The battery pack comprises: batteries (1) and a power distribution assembly (2); a tray (31), the tray being provided with a first cavity (301) having one end open, and the batteries being provided in the first cavity; and an upper cover (32), the upper cover covering the tray, the upper cover being provided with, in a first direction, a protruding portion (321) protruding upward and extending in a second direction, and the protruding portion being provided with a second cavity (302) in communication with the first cavity, the power distribution assembly being arranged in the second cavity, the length size of the protruding portion in the second direction being L1, the length direction of the battery pack in the second direction being L2, and the relational expression L1≥1 / 2*L2 being satisfied. The electric device comprises the battery pack. The power distribution assembly is arranged above the tray and is made longer in the length direction, so that the spare space of a vehicle is fully utilized, improving the passenger experience.

Description

Battery packs and power devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number "202311256856.0" entitled "Battery Pack and Electrical Device" filed by BYD Co., Ltd. on September 25, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery pack and a battery. Background Art

[0004] In the related art, the layout and positioning of the power distribution components in the battery pack are unreasonable, which affects the assembly of the battery pack, resulting in the battery pack being unable to fully match the vehicle body, affecting the space utilization of the entire vehicle.

[0005] Application Contents

[0006] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, one object of the present application is to provide a battery pack with high space utilization.

[0008] According to an embodiment of the first aspect of the present application, a battery pack includes: a battery and a power distribution assembly; a tray, the tray is provided with a first cavity open to the upper side, the battery is arranged in the first cavity; an upper cover, the upper cover is provided on the tray, and the upper cover has a raised portion formed in the middle portion in the first direction, which protrudes upward and extends along the second direction, the raised portion forms a second cavity connected to the first cavity, the power distribution assembly is provided in the second cavity, the length dimension of the raised portion in the second direction is L1, the length dimension of the battery pack in the second direction is L2, and the relationship: L1≥1 / 2L2 is satisfied.

[0009] In this application, through analysis of the body structure of the entire vehicle, the installation position of the distribution component is set above the tray, thereby making full use of the free space of the entire vehicle. By arranging the distribution component longer in the length direction to reduce the size of the distribution component in the vertical direction, the Z-direction spacing between the battery pack at the raised part and the body is larger, which is safer and improves the passenger experience.

[0010] The electrical device according to the embodiment of the second aspect of the application includes the above-mentioned battery pack.

[0011] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

[0013] FIG2 is a top view of a battery pack according to an embodiment of the present application;

[0014] FIG3 is a first assembly diagram of a power distribution assembly according to an embodiment of the present application;

[0015] FIG4 is a second assembly diagram of the power distribution assembly according to an embodiment of the present application;

[0016] FIG5 is a cross-sectional view of a battery pack according to an embodiment of the present application;

[0017] FIG6 is a side view of a power distribution assembly according to an embodiment of the present application;

[0018] FIG7 is a top view of the power distribution assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0020] A battery pack 100 according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 7 .

[0021] The battery pack 100 according to an embodiment of the present application includes: a battery 1 , a power distribution assembly 2 , a tray 31 and an upper cover 32 .

[0022] Among them, the tray 31 forms a first cavity 301 with an open end, the battery 1 is arranged in the first cavity 301, the upper cover 32 is covered on the tray 31, and the upper cover 32 is formed with a protrusion 321 protruding upward and extending along the second direction in the middle of the first direction, the protrusion 321 forms a second cavity 302 connected to the first cavity 301, and the distribution component 2 is arranged in the second cavity 302, so that the distribution component 2 is arranged in the upper area of ​​the battery pack 100 in the middle position.

[0023] The power distribution assembly 2 may include multiple working modules, such as a DC module, a CCU module, an FMCU module, etc. The multiple working modules in the power distribution assembly 2 may be directly arranged in the space defined by the second cavity 302 formed by the upper cover 32. Of course, the multiple working modules in the power distribution assembly 2 may also be assembled together to form a distribution box and then arranged in the second cavity 302.

[0024] The “first direction” is the width direction of the battery pack 100 , which is also the left-right direction shown in FIG3 , and the “second direction” is the length direction of the battery pack 100 , which is also the front-back direction shown in FIG3 .

[0025] The "first direction" can also be the length direction or height direction of the battery pack 100, and the "second direction" can also be the height direction or width direction of the battery pack, that is, the first direction and the second direction are arranged perpendicular to each other. In this application, the "first direction" is the width direction of the battery pack 100 and the "second direction" is the length direction of the battery pack 100. When the battery pack 100 is applied to a vehicle, the first direction of the battery pack 100 is parallel to one of the X-direction, Y-direction and Z-direction of the vehicle, and the second direction of the battery pack 100 is parallel to the other of the X-direction, Y-direction and Z-direction of the vehicle. For example: the first direction is parallel to the X-direction, and the second direction is parallel to the Y-direction. Among them, the X-direction refers to the width direction of the vehicle, the Y-direction refers to the traveling direction of the vehicle, and the Z-direction refers to the height direction of the vehicle.

[0026] The battery pack 100 in the present application can be applied to electrical devices (such as vehicles, etc.). By designing the installation position of the distribution box to be above the tray 31 (i.e., in the second cavity 302), the free space of the entire vehicle can be effectively utilized to ensure the arrangement of the battery cells in the tray 31, so that space for arranging the distribution box can be saved on the tray 31. More batteries 1 can be arranged in this space, thereby improving the energy storage of the battery pack 100 and improving the endurance of the entire vehicle.

[0027] Among them, the accommodating space for the battery 1 and the distribution component 2 is jointly defined by the tray 31 and the upper cover 32. There are multiple batteries 1, and the multiple batteries 1 are arranged in the first cavity 301 of the tray 31, and an accommodating space for arranging the distribution component 2 (i.e., the second cavity 302) is formed between the upper cover 32 and the battery 1. The second cavity 302 is formed by a raised portion 321, so that the distribution component 2 can be arranged on the upper part of the battery 1, thereby improving the space utilization of the entire vehicle in the vertical direction and adaptively reducing the space occupied by the battery pack 100 in the horizontal direction.

[0028] 2 , the length of the protrusion 321 in the second direction is L1 , the length of the battery pack 100 in the second direction is L2 , and the relationship is satisfied: L1 ≥ 1 / 2 L2 .

[0029] 2 , the raised portion 321 extends backward from the front end of the upper cover 32 to form a second cavity 302 for accommodating the power distribution assembly 2. When the size of the second cavity 302 in the battery pack 100 meets the above parameter range, sufficient space for arranging the power distribution assembly 2 can be reserved above the battery pack 100, thereby improving the space utilization of the battery pack 100 in the area above it.

[0030] Among them, multiple functional modules are integrated in the distribution component 2, and the functional modules are usually constructed as standard parts. Therefore, the distribution component 2 composed of multiple functional components needs to occupy a certain space in the battery pack 100. In this application, by constructing the length L1 of the distribution component 2 to be greater than or equal to half the length of the battery pack 100, the dimension occupied by the distribution component 2 in the vertical direction can be saved, thereby reducing the height dimension of the battery pack 100 and reducing the vehicle body height space occupied by the distribution component 2.

[0031] Since the functional modules in the power distribution assembly 2 are constructed as standard parts, when the functional modules in the power distribution assembly 2 are consistent, the volume of the power distribution assembly 2 also remains constant. In the present application, by increasing the length dimension of the raised portion 321 in the second direction, the layout space of the power distribution assembly 2 in the second direction is increased, and the height dimension of the power distribution assembly 2 as a whole in the vertical direction can be reduced. As a result, the height dimension of the raised portion 321 can be adaptively reduced, and the height space occupied by the raised portion 321 can be reduced. When the battery pack 100 is applied to a vehicle, the battery pack 100 is arranged in the lower area of ​​the vehicle body, and the raised portion 321 corresponds to the area adjacent to the armrest box of the vehicle. By designing the size of the raised portion 321, the height space occupied by the battery pack in the vehicle body can be reduced, which facilitates the arrangement of the battery pack 100.

[0032] In the related art, the layout and location of the power distribution assembly 2 in the battery pack 100 is unreasonable, which affects the assembly of the battery pack 100, resulting in the battery pack 100 being unable to fully match the vehicle body, affecting the space utilization of the entire vehicle.

[0033] In this application, through analysis of the vehicle's body structure, the installation position of the power distribution assembly 2 is set above the tray 31, thereby fully utilizing the free space of the vehicle, improving the vertical space utilization of the battery pack 100, ensuring the arrangement of the batteries 1 in the tray 31, and allowing a larger number of batteries 1 to be arranged in the saved space, thereby improving the energy storage effect of the battery pack 100. At the same time, by making the power distribution assembly 2 longer in the length direction (i.e., satisfying L1 ≥ 1 / 2L2) to reduce the vertical size of the power distribution assembly 2, the Z-direction spacing between the battery pack 100 at the raised portion 321 and the vehicle body is larger, which improves safety and enhances the passenger experience.

[0034] In some embodiments of the present application, the power distribution assembly 2 is disposed in the middle of the battery pack 100 in the first direction, so that the power distribution assembly 2 is arranged in the area corresponding to the second cavity 302 .

[0035] As shown in Figure 4, in some embodiments of the present application, the battery pack 100 also includes: a partition beam 33 and a pressure plate. The partition beam 33 is arranged in the first cavity 301 and divides the first cavity 301 into two adjacent sub-cavities 3011. Each sub-cavity 3011 is used to arrange a battery 1. The partition beam 33 is used to install a distribution component 2. The pressure plate is connected to the tray 31 and is arranged above the battery 1. The pressure plate is used to restrain the battery 1 and support the distribution component 2.

[0036] 4 , the partition beam 33 extends along the first direction and divides the first cavity 301 into two sub-cavities 3011 arranged at intervals along the second direction. Each sub-cavity 3011 is used to arrange a battery 1. When the battery 1 is a rectangular parallelepiped, multiple batteries 1 can be arranged in sequence in the sub-cavity 3011 along the second direction or the first direction.

[0037] At the same time, a pressure plate is provided above the battery 1 to constrain the upper surface of the battery 1 to improve the assembly reliability of the battery 1 in the tray 31. Accordingly, each sub-cavity 3011 is provided with a pressure plate.

[0038] The power distribution assembly 2 is arranged on a side surface (ie, the upper surface) of the pressure plate facing away from the battery 1 to support the power distribution assembly 2 .

[0039] In some embodiments of the present application, the partition beam 33 extends along the first direction and is arranged in the middle of the first cavity 301 in the second direction. The partition beam 33 is provided with a first mounting portion, and the pressure plate is provided with a second mounting portion. The first mounting portion and the second mounting portion are respectively used to install the distribution component 2 to fix the distribution component 2 and improve the assembly reliability of the distribution component 2 in the battery pack 100.

[0040] 3 , the distance between the first mounting portion and the second mounting portion in the second direction is L3, the length of the power distribution assembly 2 in the second direction is L, and the relationship is satisfied: 2 / 3L≤L3<L. Thus, the installation reliability of the power distribution assembly 2 can be improved.

[0041] The partition beam 33 and the pressure plate are formed with mounting structures (i.e., a first mounting portion and a second mounting portion) for mounting the power distribution component 2. Correspondingly, mounting structures (such as mounting holes, etc.) that are respectively connected and cooperated with the first mounting portion and the second mounting portion are also provided on the power distribution component 2. By keeping the distance between the two mounting structures within the above-mentioned parameter range, the assembly and fixing effect of the power distribution component 2 can be guaranteed.

[0042] 3 , L3 is the distance between the center position of the first mounting portion and the center position of the second mounting portion, and L3 may have a certain measurement error in actual measurement.

[0043] In some embodiments of the present application, the distribution component 2 is respectively provided with a first fixed portion 201 and a second fixed portion 202 on both sides of the first direction, the first fixed portion 201 is connected to the partition beam 33, and the second fixed portion 202 is connected to the pressure plate. The distance between the first fixed portion 201 and the second fixed portion 202 in the second direction is L4, the length dimension of the distribution component 2 in the second direction is L, and satisfies the relationship: 2 / 3L≤L4<L.

[0044] That is, the first fixing portion 201 can be connected and matched with the above-mentioned first mounting portion, and the second fixing portion 202 can be fixed and matched with the above-mentioned second connecting portion.

[0045] The preferred arrangement position of the first fixing portion 201 and the second fixing portion 202 is the center of gravity of the power distribution assembly 2 .

[0046] Referring to Figure 3 , L4 is the distance between the center of the first fixing portion 201 (mounting hole structure) and the center of the second fixing portion 202 (mounting hole structure). In actual measurement, L4 may have a certain measurement error. Furthermore, when L3 and L4 are measured using the same method, L3 = L4.

[0047] In some specific embodiments of the present application, the first fixing portion 201 and the second fixing portion 202 are configured as hole structures, and accordingly, the first mounting portion and the second mounting portion are configured as mounting seats or mounting column structures. Taking the mounting column as an example, the mounting column can be provided with a threaded hole corresponding to the hole structure. The threaded hole is arranged opposite the second fixing portion 202 configured as a hole structure, and a threaded connector is threadedly engaged with the threaded hole to achieve assembly of the power distribution assembly 2 and the partition beam 33 (or pressure plate). This can also ensure that the battery pack 100 is safe from installation defects such as loosening due to vibration and impact.

[0048] 7 , the first fixing portion 201 and the second fixing portion 202 are spaced apart along the second direction, and the first fixing portion 201 and the second fixing portion 202 are each constructed in two, the two first fixing portions 201 are respectively arranged on both sides of the power distribution component 2 in the first direction, and the two second fixing portions 202 are also respectively arranged on both sides of the power distribution component 2 in the first direction, so as to form symmetrical mounting points on the power distribution component 2, thereby improving the assembly stability and reliability of the power distribution component 2.

[0049] The specific structures of the first mounting portion, the second mounting portion, the first fixing portion 201, and the second fixing portion 202 are not limited thereto, and may also be connected in a plug-in, snap-on, or other manner. In this application, the ratio of the distance between the mounting structures to the size of the power distribution assembly 2 is limited so that the mounting point is arranged at the center of gravity of the power distribution assembly 2, thereby improving the assembly reliability of the power distribution assembly 2.

[0050] In some embodiments of the present application, 350 mm ≤ L4 ≤ 400 mm. The size of the power distribution assembly 2 in the first direction is typically in the range of 620 mm to 640 mm. When L4 meets the above parameter range, the two mounting portions can be designed at the center of gravity of the power distribution assembly 2 to improve the assembly reliability of the power distribution assembly 2.

[0051] As shown in Figures 6 and 7, in some embodiments of the present application, the length dimension of the distribution component 2 in the second direction is L, and satisfies the relationship: 620mm≤L≤640mm; the width dimension of the distribution component 2 in the first direction is D, and satisfies the relationship: 120mm≤D≤155mm; the height dimension of the distribution component 2 in the third direction is H, and satisfies the relationship: 80mm≤H≤85mm.

[0052] The above parameter ranges are the length, width, and height dimensions of the power distribution assembly 2. The dimensions of the power distribution assembly 2 satisfy at least one of the above parameter ranges, thereby constructing the power distribution assembly 2 into a compact electrical device. As a result, electrical components such as the main positive / main negative relay, fast charge positive and negative relay, pre-charge relay, pre-charge resistor, smart fuse, Hall, main fuse, high-voltage monitoring module, and controller can be arranged accordingly within a limited size space. Among them, the height dimension H of the raised portion 321 is within the range of 80mm-85mm, and the raised portion 321 occupies a small dimension in the vertical direction. When the battery pack 100 is applied to a vehicle, the raised portion 321 can be adapted to the vehicle body floor.

[0053] In some embodiments of the present application, the length dimension of the distribution component 2 in the second direction is L, the width dimension of the distribution component 2 in the first direction is D, and the height dimension of the distribution component 2 in the third direction is H, and satisfies at least one of the following relationships: 3≤L / D≤6; 1≤D / H≤2; 6≤L / H≤8.

[0054] The length, width and height ratios of the power distribution assembly 2 may satisfy at least one of the above parameter ranges, thereby meeting the arrangement requirements of multiple electrical components in a limited space.

[0055] In a specific embodiment of the present application, the length dimension L, width dimension D and height dimension H of the distribution component 2 satisfy the relationship: L / D / H = 7:2:1, so that the distribution component 2 is constructed as a roughly rectangular structure with a reasonable size ratio, which is convenient for designing a fixed installation point according to the center of gravity of the distribution box.

[0056] The length, width and height ratio of the power distribution assembly 2 is not limited thereto, and may have a certain error based on the above-mentioned proportional relationship (ie, 7:2:1), as long as it roughly conforms to the above-mentioned ratio.

[0057] In some embodiments of the present application, the battery pack 100 further includes a plurality of lifting ears 35, which are respectively arranged on the outer wall surfaces on both sides of the tray 31 in the first direction, and the lifting ears 35 are used to connect to the vehicle body to fix the battery pack 100 to the vehicle body.

[0058] 1 and 2 , only one of the multiple lugs 35 is shown in the drawings. The lugs 35 have the same structure, and the multiple lugs 35 located on the outer wall of the same side of the tray 31 can be spaced apart in sequence along the second direction to form multiple mounting points on the tray 31, thereby improving the connection reliability between the battery pack 100 and the vehicle body.

[0059] In an embodiment of the present application, at least one of the multiple ears 35 on each side of the tray 31 on both sides in the first direction is provided with a positioning column 351, and the positioning column 351 is used to position with the vehicle body, so that the position of the battery pack 100 can be positioned, reducing the difficulty of assembling the battery pack 100.

[0060] 1 , the positioning post 351 is provided on the upper surface of the lifting ear 35 and extends upward in the vertical direction. Thus, when the battery pack 100 is hoisted and installed, it can be first positioned with the installation component (such as the vehicle body) through the positioning post 351 to improve the assembly efficiency of the battery pack 100.

[0061] As shown in Figure 3, in some embodiments of the present application, the vertical distance between the centerline of the power distribution assembly 2 in the first direction and the lifting lug 35 is L5, and satisfies the relationship: 500mm≤L5≤550mm. Therefore, when the battery pack 100 is used in a vehicle, the power distribution assembly 2 can be placed in the middle of the vehicle body width direction, corresponding to the position of the vehicle armrest space, ensuring the compatibility between the battery pack 100 and the vehicle body, preventing the formation of irregular protrusions on the vehicle body floor due to the vehicle body adapting to the battery pack 100, and improving the riding experience for the driver and passengers.

[0062] In some other embodiments of the present invention, in the first direction, the minimum distance between the lifting ear 35 and the power distribution assembly 2 is L6, and satisfies the relationship: 470 mm ≤ L6 ≤ 480 mm.

[0063] “L5” and “L6” can simultaneously satisfy the above parameter ranges, thereby effectively preventing interference between the positioning posts 351 and the upper cover 32 and ensuring the connection effect between the tray 31 and the upper cover 32 .

[0064] As shown in Figure 3, in some embodiments of the present application, the battery pack 100 is provided with a DC fast charging port 41, and the power distribution assembly 2 is provided with a fast charging circuit mounting portion 21. The DC fast charging port 41 and the fast charging circuit mounting portion 21 are arranged opposite to each other, and the distance between the two is L7, and the relationship is satisfied: 400mm≤L7≤450mm.

[0065] 1 , the DC fast-charging port 41 is disposed at the rear end of the battery pack 100 and is located in the middle of the rear end of the battery pack 100 (i.e., the middle area in the first direction), thereby positioning the fast-charging circuit mounting portion 21 relative to the DC fast-charging port 41, shortening the distance between the fast-charging circuit mounting portion 21 and the DC fast-charging port 41 and facilitating connection of the fast-charging circuit mounting portion 21 to the DC fast-charging port 41. This allows the copper busbars inside the battery pack 100 to be arranged in a reasonable orientation, fully shortening the distance between the mounting portion of the power distribution assembly 2 and the connection port on the tray 31, reducing the length of the copper busbars inside the battery pack 100, saving costs, and improving the safety performance of the battery pack 100.

[0066] Referring to Figure 3 , L7 is measured as the minimum distance from the edge of the DC fast-charging port 41 to the edge of the fast-charging circuit mounting portion 21. Because the DC fast-charging port 41 and the fast-charging circuit mounting portion 21 are positioned opposite each other, L7 is also the distance between the DC fast-charging port 41 and the edge of the fast-charging circuit mounting portion 21 in the second direction. In actual measurements, L7 may have some measurement error.

[0067] In some embodiments of the present application, the battery pack 100 is provided with a load discharge port 42, and the power distribution assembly 2 is provided with a load circuit mounting portion 22. The distance between the load discharge port 42 and the load circuit mounting portion 22 in the second direction is L8, and the relationship 400mm≤L8≤450mm is satisfied.

[0068] 1 , the load discharge port 42 is provided at the rear end of the battery pack 100 , and the load discharge port 42 and the DC fast charge port 41 are spaced apart in the first direction, and the load circuit mounting portion 22 on the power distribution assembly 2 can be connected to the load discharge port 42 through a wiring harness.

[0069] 3 , L8 is measured as the vertical distance from the edge of the load discharge port 42 to the edge of the load circuit mounting portion 22 in the second direction, and a certain measurement error may exist in L8 in actual measurement.

[0070] 3 , the load circuit mounting portion 22 and the fast charging circuit mounting portion 21 are both arranged on the same side of the power distribution assembly 2 (i.e., the side adjacent to the load discharge port 42 and the DC fast charging port 41; which is also the rear side of the battery pack 100). This shortens the distance between the mounting portion of the power distribution assembly 2 and the connection port on the tray 31, reduces the length of the connecting components in the battery pack 100 (such as copper busbars, wiring harnesses, etc.), saves costs, and improves the safety performance of the battery pack 100.

[0071] Among them, since the load circuit mounting portion 22 and the fast charging circuit mounting portion 21 are arranged adjacent to each other, the parameter range of the distance between the DC fast charging port 41 and the fast charging circuit mounting portion 21 (i.e., L7) and the distance between the load discharge port 42 and the load circuit mounting portion 22 in the second direction (i.e., L8) are close to or the same.

[0072] In some embodiments of the present application, the battery pack 100 is provided with a discharge port 43, and the power distribution assembly 2 is provided with a discharge circuit installation portion 23. The distance between the discharge port 43 and the discharge circuit installation portion 23 in the second direction is L9, and the relationship 25mm≤L9≤50mm is satisfied.

[0073] 1 , the discharge port 43 of the battery pack 100 is disposed at the front end of the battery pack 100 , and the discharge circuit mounting portion 23 in the power distribution assembly 2 is disposed adjacent to the front end of the battery pack 100 , thereby shortening the distance between the discharge port 43 and the discharge circuit mounting portion 23 and facilitating electrical connection between the discharge circuit mounting portion 23 and the discharge port 43 .

[0074] In the present application, by designing the layout positions of the mounting parts (such as the fast charging circuit mounting part 21, the load circuit mounting part 22, and the discharge circuit mounting part 23) in the power distribution assembly 2, the distance between the mounting parts and the connection ports (such as the DC fast charging port 41, the load discharge port 42, and the discharge port 43) provided on the tray 31 is effectively shortened, thereby shortening the layout length of the connection components in the battery pack 100 and reducing costs.

[0075] 3 , L9 is measured as the minimum distance from the edge of the discharge port 43 to the edge of the discharge circuit mounting portion 23 , and there may be a certain measurement error in L9 during actual measurement.

[0076] The DC fast charging port 41, the load discharge port 42, and the discharge port 43 of the battery pack 100 are formed on the side walls of the tray 31. The above ports are respectively arranged on the side walls of the tray 31 in the front and rear directions.

[0077] As shown in Figure 5, in some embodiments of the present application, the distribution component 2 is matched with the inner wall gap of the protrusion 321, and the gap size is in the range of 3mm-5mm, so that an assembly gap can be reserved between the distribution component 2 and the inner wall of the protrusion 321 to prevent problems such as extrusion and collision between the distribution component 2 and the upper cover 32, thereby improving the assembly reliability of the distribution component 2 in the battery pack 100.

[0078] 5 , the gap between the power distribution assembly 2 and the inner wall of the raised portion 321 is the minimum installation gap between the outer shape of the power distribution assembly 2 and the inner wall in the second direction, the first direction, and the third direction. When the size of the gap meets the above parameter range value, a reasonable assembly gap can be reserved.

[0079] In some embodiments of the present application, the power distribution component 2 includes: a DC module, the DC module is provided with a fast charging circuit installation portion 21, the DC module is arranged on a side of the power distribution component 2 close to the DC fast charging port 41, and is arranged opposite to the DC fast charging port 41; a CCU module, the CCU module is arranged adjacent to the DC module and is provided with a load circuit installation portion 22, the CCU module is arranged on a side of the power distribution component 2 close to the load discharge port 42; an FMCU module, the FMCU module is provided with a discharge circuit installation portion 23, and the FMCU module is arranged on a side of the power distribution component 2 close to the discharge port 43, and is arranged opposite to the discharge port 43.

[0080] Among them, the power distribution component 2 is composed of multiple functional modules (such as the above-mentioned DC module, FMCU module and CCU module), and multiple functional modules (installation parts in functional modules) can be electrically connected to the ports arranged on the tray 31 through electrical connectors such as copper busbars or wiring harnesses.

[0081] Referring to Figure 3 , the present application arranges the DC module opposite to the DC fast-charge port 41 and arranges it on the side of the power distribution assembly 2 near the DC fast-charge port 41, thereby substantially shortening the distance between the DC fast-charge port 41 and the fast-charge circuit mounting portion 21. The present application arranges the CCU module on the side of the power distribution assembly 2 near the load discharge port 42, thereby substantially shortening the distance between the load discharge port 42 and the load circuit mounting portion 22. The present application arranges the FMCU module on the side of the power distribution assembly 2 near the discharge port 43, thereby substantially shortening the distance between the discharge port 43 and the discharge circuit mounting portion 23. This reduces the difficulty of arranging electrical connectors.

[0082] Since the load discharge port 42 and the DC fast charging port 41 are arranged on the same side of the tray 31, the DC module and the CCU module can be arranged adjacent to each other, thereby making the layout between the functional modules of the power distribution component 2 compact and reasonable.

[0083] Among them, the fast charging circuit installation part 21 can be the interface of the DC module, the load circuit installation part 22 can be the interface of the CCU module, and the discharge circuit installation part 23 can be the structure of the FMCU module, and they are respectively used to connect with electrical connectors such as copper busbars or wiring harnesses.

[0084] According to the electrical device of the embodiment of the present application, including the above-mentioned battery pack 100, the space of the electrical device (such as a vehicle) can be effectively utilized by setting the above-mentioned battery pack 100, and the structure and size design of the distribution component 2 in the battery pack 100 are reasonable, which improves the assembly reliability of the distribution component 2 in the battery pack 100 and facilitates the connection and coordination between the distribution component 2 and multiple connection ports of the battery pack 100.

[0085] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0086] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0087] In the description of this application, “plurality” means two or more.

[0088] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0089] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0090] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0091] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack, comprising: A battery (1) and a power distribution assembly (2); A tray (31), the tray (31) forming a first cavity (301) with an open end, the battery (1) being arranged in the first cavity (301); An upper cover (32), the upper cover (32) is arranged on the tray (31), and the upper cover (32) is formed with a protrusion (321) protruding upward in a first direction and extending along a second direction, the protrusion (321) forms a second cavity (302) connected to the first cavity (301), the power distribution component (2) is arranged in the second cavity (302), the length dimension of the protrusion (321) in the second direction is L1, the length dimension of the battery pack in the second direction is L2, and the relationship is satisfied: L1≥1 / 2L2.

2. The battery pack according to claim 1, wherein: The battery pack comprises: a partition beam (33), the partition beam (33) being arranged in the first cavity (301) and dividing the first cavity (301) into two adjacent sub-cavities (3011), each of the sub-cavities (3011) being used for arranging the battery (1), and the partition beam (33) being used for installing the power distribution assembly (2); A pressure plate, the pressure plate is connected to the tray (31) and is arranged above the battery (1), and the pressure plate is used to constrain the battery (1) and support the power distribution assembly (2).

3. The battery pack according to claim 2, wherein: The partition beam (33) extends along the first direction and is arranged in the middle of the first cavity (301) in the second direction, the partition beam (33) is provided with a first mounting portion, and the pressure plate is provided with a second mounting portion, and the first mounting portion and the second mounting portion are respectively used to mount the power distribution assembly (2); The distance between the first mounting portion and the second mounting portion in the second direction is L3, the length dimension of the power distribution component (2) in the second direction is L, and the relationship is satisfied: 2 / 3L≤L3<L.

4. The battery pack according to claim 2 or 3, wherein: The power distribution component (2) is provided with a first fixing portion (201) and a second fixing portion (202) on both sides of the first direction, respectively; the first fixing portion (201) is connected to the partition beam (33), and the second fixing portion (202) is connected to the pressure plate; the distance between the first fixing portion (201) and the second fixing portion (202) in the second direction is L4; the length dimension of the power distribution component (2) in the second direction is L, and the relationship is satisfied: 2 / 3L≤L4<L.

5. The battery pack according to claim 4, wherein: 350mm≤L4≤400mm.

6. The battery pack according to any one of claims 1 to 5, wherein: The length dimension of the power distribution assembly (2) in the second direction is L, and satisfies the relationship: 620 mm ≤ L ≤ 640 mm; And / or, the width dimension of the power distribution assembly (2) in the first direction is D, and satisfies the relationship: 120 mm ≤ D ≤ 155 mm; And / or, the height dimension of the power distribution assembly (2) in the third direction is H, and satisfies the relationship: 80mm≤H≤85mm.

7. The battery pack according to any one of claims 1 to 6, wherein: The length dimension of the power distribution component (2) in the second direction is L, the width dimension of the power distribution component (2) in the first direction is D, and the height dimension of the power distribution component (2) in the third direction is H, and satisfies at least one of the following relationships: 3≤L / D≤6; 1≤D / H≤2; 6≤L / H≤8.

8. The battery pack according to any one of claims 1 to 7, wherein: The tray (31) further comprises a plurality of lifting ears (35), wherein the plurality of lifting ears (35) are respectively arranged on the outer wall surfaces of the tray (31) on both sides in the first direction, and the lifting ears (35) are used to be connected to the vehicle body.

9. The battery pack according to claim 8, wherein: At least one of the plurality of lifting ears (35) on each of the two sides of the tray (31) in the first direction is provided with a positioning column (351), and the positioning column (351) is used for positioning with the vehicle body.

10. The battery pack according to claim 8 or 9, wherein: The vertical distance between the center line of the power distribution assembly (2) in the first direction and the lifting lug (35) is L5, and satisfies the relationship: 500mm≤L5≤550mm; And / or, in the first direction, the minimum distance from the lifting ear (35) to the power distribution assembly (2) is L6, and satisfies the relationship: 450mm≤L6≤480mm.

11. The battery pack according to any one of claims 1 to 10, wherein: The battery pack is provided with a DC fast charging port (41), the power distribution assembly (2) includes a DC module, the DC module is provided with a fast charging circuit installation portion (21), the DC module is arranged on a side of the power distribution assembly (2) close to the DC fast charging port (41), and is arranged opposite to the DC fast charging port (41), the DC fast charging port (41) and the fast charging circuit installation portion (21) are arranged opposite to each other, and the distance between the two is L7, and the relationship is satisfied: 400mm≤L7≤450mm.

12. The battery pack according to any one of claims 1 to 11, wherein: The battery pack is provided with a load discharge port (42), the power distribution assembly (2) comprises a CCU module, the CCU module is provided with a load circuit installation portion (22), the CCU module is arranged on a side of the power distribution assembly (2) of the distribution box close to the load discharge port (42), the distance between the load discharge port (42) and the load circuit installation portion (22) in the second direction is L8, and the relationship 400mm≤L8≤450mm is satisfied.

13. The battery pack according to any one of claims 1 to 12, wherein: The battery pack is provided with a discharge port (43), the power distribution component (2) is provided with an FMCU module, the FMCU module is provided with the discharge circuit installation portion (23), and the FMCU module is arranged on a side of the power distribution component (2) adjacent to the discharge port (43) and is arranged opposite to the discharge port (43), the distance between the discharge port (43) and the discharge circuit installation portion (23) in the second direction is L9, and satisfies the relationship 25mm≤L9≤50mm.

14. The battery pack according to any one of claims 1 to 13, wherein: The power distribution assembly (2) is gap-matched with the inner wall of the raised portion (321), and the gap size is in the range of 3 mm to 5 mm.

15. The battery pack according to claim 1, wherein: In the projection of the bottom surface of the tray, the minimum distances between the distribution component (2) and the edge of the tray on the same side of the first direction are L10 and L11, and the size of the distribution component (2) in the first direction is D, and satisfies at least one of the following relationships: 440mm≤L10≤490mm, 440mm≤L11≤490mm, 120mm≤D≤155mm.

16. The battery pack according to claim 15, wherein: L10=L11.

17. An electrical device comprising the battery pack according to any one of claims 1 to 16.

18. The electrical device according to claim 17, wherein: The electrical device is a vehicle, the battery pack is mounted on the vehicle body, and the vehicle body is provided with an escape space recessed upward, the raised portion corresponds to the escape space, and at least a portion of the raised portion is provided in the escape space.

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