Battery pack and powered device

Abstract

The present disclosure provides a battery pack and an electric device. The battery pack is adapted to be mounted on a carrier frame, the carrier frame comprising two carrier portions spaced apart in a first direction, each carrier portion extending along a second direction, the battery pack comprising a box body and a plurality of battery groups. The box body comprises a first accommodating portion to an Nth accommodating portion stacked in a height direction from a top of the box body to a bottom of the box body, the first direction, the second direction and the height direction being perpendicular to each other. The plurality of battery groups are respectively accommodated in the plurality of accommodating portions, each battery group comprising a plurality of batteries. The Xth accommodating portion is provided with a support beam protruding beyond a corresponding side surface on each of two opposite sides of the Xth accommodating portion in the first direction, the support beam extending along the second direction, the Xth accommodating portion comprising a lower portion lower than the support beam in the height direction, the two support beams being adapted to be respectively supported on the two carrier portions such that the lower portions are located in a space between the two carrier portions, 2≤X≤N. Greater battery capacity is achieved in a limited space.

Description

Technical Field

[0001] This disclosure relates to the field of batteries, and in particular, to a battery pack and an electrical device having the battery pack. Background Technology

[0002] Battery packs typically consist of multiple enclosures housing a series or parallel array of batteries, which power electrical equipment. In high-energy-consuming scenarios such as large machinery or energy storage systems, the capacity and size of battery packs often increase to meet the ever-growing electricity demands. However, the physical space of the electrical equipment itself is limited, and the increase in battery pack size and weight directly leads to increased installation difficulty and load-bearing pressure. Utility Model Content

[0003] In view of this, this disclosure provides a battery pack designed to address the problem that the increase in battery pack size and weight directly leads to increased installation difficulty and load-bearing pressure.

[0004] The battery pack is adapted to be mounted on a support frame, which includes two spaced-apart support sections in a first direction, each extending in a second direction. The battery pack includes a housing and multiple battery packs. The housing includes first to Nth receiving sections stacked sequentially from the top to the bottom of the housing in the height direction, with the first, second, and height directions perpendicular to each other. Multiple battery packs are housed within the multiple receiving sections, each battery pack including multiple batteries. Each of the Xth receiving sections has a support beam protruding beyond the corresponding side on each of its opposite sides in the first direction, the support beam extending in the second direction. The Xth receiving section includes a lower portion in the height direction below the support beams. The two support beams are adapted to support the two support sections respectively, such that the lower portion is located in the space between the two support sections, where 2 ≤ X ≤ N.

[0005] This battery pack suspends its lower part in the space between two spaced-apart support sections by directly mounting the support beams on both sides of the Xth receiving section. This not only effectively utilizes the inherent gap between the two support sections, avoiding interference between the lower part of the battery pack and the support frame, but also improves the compactness of the space occupied by the electrical equipment housing the battery pack, thus achieving a larger battery capacity and a more stable support effect within a limited space. Since 2≤X≤N, meaning the support beams are located on both sides of the lower receiving section of the battery pack, rather than on both sides of the first receiving section, after the battery pack is installed, the weight of all receiving sections above the support beams (i.e., the first to the (X-1)th receiving sections) and the internal battery pack is transferred through the enclosure to the support beams on both sides of the Xth receiving section, and converted into compressive stress along the second direction. The support beams exhibit higher stability and load-bearing efficiency under compressive stress, effectively preventing instability and reliably bearing the weight of the battery pack, ensuring structural safety for long-term use.

[0006] This disclosure also provides an electrical appliance. The electrical appliance includes the aforementioned battery pack. Attached Figure Description

[0007] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0008] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0009] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0010] Figure 1 This is an exploded view of a battery pack according to an embodiment of the present disclosure.

[0011] Figure 2 for Figure 1 A schematic front view of the battery pack.

[0012] Figure 3 for Figure 1 A schematic top view of the battery pack.

[0013] Figure 4 This is a schematic front view of a battery pack according to another embodiment of the present disclosure.

[0014] Figure 5 This is a schematic top view of a battery pack according to another embodiment of the present disclosure.

[0015] Figure 6 This is a partial cross-sectional view of an electrical appliance according to an embodiment of the present disclosure.

[0016] Explanation of reference numerals in the attached figures: 100—Battery pack; 10—Box body; 11—Receiving part; 11a—First receiving part; 11x—Xth receiving part; 11b—X-1th receiving part; 11n—Nth receiving part; 12—Support beam; 12a—Support section; 121—Fixing hole; 13—Support rib; 20—Battery pack; 21—Lower part; 30—Cover plate; 200—Electrical equipment. Detailed Implementation

[0017] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0018] <Example Battery Pack> This disclosure provides a battery pack according to one embodiment. (See reference...) Figure 1 The battery pack 100 includes a housing 10, multiple battery packs 20, and a cover 30. The multiple batteries are electrically connected to form the battery packs 20. The housing 10 houses the batteries and the battery management system. The batteries are electrically connected to the battery management system to enable the charging and discharging of the multiple batteries. The housing 10 and the cover 30 serve as external protective structures, typically made of metal or composite materials, and are waterproof, dustproof, and impact-resistant, providing a safe operating environment for the internal components such as the batteries and the battery management system.

[0019] The battery pack 100 may also include a battery group 20 composed of multiple batteries connected in series and parallel, and integrate a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components. These components are housed within the receiving cavity of the housing 10 and sealed by the housing top cover 60, forming a complete functional unit capable of directly outputting electrical energy. The battery pack 100 can serve as a rechargeable battery group 20, acting as a power source for new energy vehicles, primarily for storing and providing electrical energy.

[0020] Continue to refer to Figure 1 The battery pack 100 is adapted to be mounted on a support frame 101, which includes two support portions 101a and 101b spaced apart in a first direction. Each support portion 101a and 101b extends in a second direction. The battery pack 100 includes a housing 10 and a plurality of battery packs 20. The housing 10 includes a first receiving portion 11a to an Nth receiving portion 11n stacked sequentially from the top to the bottom of the housing 10 along the height direction, with the first direction, the second direction, and the height direction being perpendicular to each other. The plurality of battery packs 20 are respectively housed in the plurality of receiving portions 11, and each battery pack 20 includes a plurality of batteries. The Xth receiving portion 11x has a support beam 12 protruding beyond the corresponding side on each of the opposite sides in the first direction. The support beam 12 extends along the second direction. The Xth receiving portion 11x includes a lower portion 21 that is lower than the support beam 12 in the height direction. The two support beams 12 are adapted to be supported on the two bearing portions 101a and 101b respectively, such that the lower portion 21 is located in the space between the two bearing portions 101a and 101b, where 2≤X≤N.

[0021] For ease of description, in the accompanying drawings of this disclosure, arrows X+ and X- respectively indicate opposite sides in a first direction, arrows Y+ and Y- respectively indicate opposite sides in a second direction, and arrows Z+ and Z- respectively indicate opposite sides in a height direction.

[0022] refer to Figure 1 and Figure 2The battery pack 100 directly mounts the support beams 12 on both sides of the Xth housing 11x onto two spaced-apart support parts 101a and 101b, so that the lower part 21 of the battery pack 100 is suspended in the space between the two support parts 101a and 101b. This not only effectively utilizes the inherent gap between the two support parts 101a and 101b and avoids interference between the lower part 21 of the battery pack 100 and the support frame 101, but also improves the compactness of the space for the electrical equipment that houses the battery pack 100, thereby achieving a larger battery capacity and a more stable support effect in a limited space. Since 2≤X≤N, meaning the support beams 12 are positioned on both sides of the receiving portion 11 in the lower part 21 of the battery pack 100, rather than on both sides of the first receiving portion 11a, after the battery pack 100 is installed, the weight of all the receiving portions 11 above the support beams 12—namely, the first receiving portion 11a to the (X-1)th receiving portion 11b—and the internal battery pack 20 are transferred through the housing 10 to the support beams 12 on both sides of the Xth receiving portion 11x, and converted into compressive stress along the second direction. The support beams 12 exhibit higher stability and load-bearing efficiency when subjected to compressive stress, effectively preventing instability and reliably supporting the weight of the battery pack 100, ensuring structural safety for long-term use.

[0023] X can be an integer greater than or equal to N / 2. For example, if N equals 3, then X can equal 2 or 3, meaning that the support beams 12 can be respectively located on both sides of the second receiving part, or the support beams 12 can be respectively located on both sides of the third receiving part. If N equals 4, then X can equal 2, 3, or 4, meaning that the support beams 12 can be respectively located on both sides of the second receiving part, or the support beams 12 can be respectively located on both sides of the third receiving part, or the support beams 12 can be respectively located on both sides of the fourth receiving part. Positioning the support beams 12 at or below the middle of the battery pack 100 lowers the center of gravity of the entire battery pack 100, improving the overturning resistance and overall stability of the battery pack 100 and its electrical equipment during operation or movement. Simultaneously, the support beams 12 have high load-bearing efficiency under pressure and are less prone to instability.

[0024] X can be equal to N, that is, by placing the support beam 12 on both sides of the Nth receiving part 11n at the bottom layer, the overturning resistance and overall stability of the battery pack 100 and its electrical equipment during operation or movement can be further improved.

[0025] refer to Figure 1 and Figure 2The support beam 12 can be flush with the top of the Xth receiving portion 11x, and the top of the Xth receiving portion 11x can be the side closest to the first receiving portion 11a, i.e., the Z+ side. This allows the weight of all the receiving portions 11 located above the support beam 12, i.e., the first receiving portion 11a to the (X-1)th receiving portion 11b, to be directly transferred to the support beam 12 via the shortest path, reducing bending moments and internal stresses in the box structure 10 and improving structural rigidity. In another embodiment, the support beam 12 can be located at the middle of the Xth receiving portion 11x in the height direction.

[0026] refer to Figure 2 and Figure 3 The support beam 12 has a dimension L1 in the second direction, in mm, and the Xth receiving portion 11x has a dimension L2 in the second direction, in mm, where 0.48 ≤ L1 / L2 ≤ 0.93. Preferably, 0.5 ≤ L1 / L2 ≤ 0.9. More preferably, 0.55 ≤ L1 / L2 ≤ 0.85. Alternatively, the ratio L1 / L2 can also be 0.6, 0.65, 0.7, 0.75, or 0.8, etc. If L1 / L2 is too small, i.e., L1 / L2 is less than 0.48, the length L1 of the support beam 12 is relatively insufficient. This means that the weight of the upper housing 11 and the housed battery pack 20 can only be transferred to the support frame 101 through the limited surface area of ​​the support beam 12. This will result in an insufficient effective bearing area of ​​the support beam 12, which may cause local stress concentration and increase the risk of plastic deformation of the support beam 12. At the same time, an excessively short support beam 12 will also affect the installation stability and may even cause the battery pack 100 to sway or become unstable on the support frame 101. If L1 / L2 is too large, i.e., L1 / L2 is greater than 0.93, the length L1 of the support beam 12 is relatively too long. This will not only waste materials and increase weight, but also make the excessively long support beam 12 more prone to generating a larger bending moment when subjected to vibration or impact, which will increase the risk of fracture at the root of the support beam 12. Based on the above ratio range, it is ensured that the support beam 12 achieves a good support effect and a high space utilization rate on the support parts 101a and 101b.

[0027] Further, 1000mm ≤ L1 ≤ 1400mm. Preferably, 1050mm ≤ L1 ≤ 1350mm. More preferably, 1100mm ≤ L1 ≤ 1300mm. Alternatively, the value of L1 can also be 1150mm, 1200mm, 1250mm, or 1280mm, etc. 1500mm ≤ L2 ≤ 2100mm. Preferably, 1550mm ≤ L2 ≤ 2050mm. More preferably, 1600mm ≤ L2 ≤ 2000mm. Alternatively, the value of L2 can also be 1700mm, 1800mm, 1900mm, or 1950mm, etc.

[0028] Continue to refer to Figure 2and Figure 3 The support beam 12 may be provided with a plurality of fixing holes 121 spaced apart along the second direction. Each fixing hole 121 allows a fastener (not shown in the figure) to pass through to fix the support beam 12 to the corresponding bearing parts 101a, 101b. The fastener can be a screw. When the vehicle starts, stops or accelerates, the battery pack 100 will be subjected to a large inertial force along the first or second direction. The spaced fixing holes 121 and the fasteners can effectively prevent the battery pack 100 from sliding longitudinally or shifting laterally on the bearing frame 101, ensuring the reliability of the connection between the battery pack 100 and the electrical equipment.

[0029] Continue to refer to Figure 3 The dimension of the Xth receiving portion 11x in the first direction is W1 (mm), and the dimension of the Xth receiving portion 11x in the second direction is L2 (mm), where 1.23 ≤ L2 / W1 ≤ 2.3. Preferably, 1.3 ≤ L2 / W1 ≤ 2.2. More preferably, 1.5 ≤ L2 / W1 ≤ 2. Alternatively, the value of L2 / W1 can also be 1.6, 1.7, 1.8, or 1.9, etc. The dimension of the Xth receiving portion 11x in the first direction is the width of the Xth receiving portion 11x. The dimension of the Xth receiving portion 11x in the second direction is the length of the Xth receiving portion 11x. If L2 / W1 is too small, i.e., L2 / W1 is less than 1.23, the effective length L1 of the support beam 12 arranged along the second direction is limited by L2. If L2 is too short, the extension dimension of the support beam 12 will be insufficient, and it will not be able to bear the weight of the battery pack 100 well, and the load-bearing efficiency and anti-instability ability will be significantly reduced. If L2 / W1 is too large, i.e., L2 / W1 is greater than 2.3, it will weaken the ability of the housing 11 above the Xth housing 11x and the internal battery pack 20 to stably transfer the weight to the two side support beams 12, affecting the overall structural rigidity. According to the above ratio range, it is ensured that the support beams 12 can be set on both sides of the Xth housing 11x in the width direction, so as to more stably support the battery pack 100.

[0030] Further, 1500mm ≤ L2 ≤ 2100mm, preferably 1550mm ≤ L2 ≤ 2050mm. More preferably, 1600mm ≤ L2 ≤ 2000mm. Alternatively, the value of L2 can also be 1650mm, 1700mm, 1800mm, or 1900mm, etc. 900mm ≤ W1 ≤ 1200mm. Preferably, 950mm ≤ W1 ≤ 1150mm. More preferably, 1000mm ≤ W1 ≤ 1100mm. Alternatively, the value of W1 can also be 1030mm, 1060mm, or 1090mm, etc.

[0031] Back Figure 2Multiple receiving portions 11 can have the same size in the first direction, that is, the width from the first receiving portion 11a to the Nth receiving portion 11n is the same. In this way, the box 10 located on both sides of the multiple receiving portions 11 can extend directly from the top to the bottom, which simplifies the installation process of the box 10 and reduces the manufacturing difficulty.

[0032] Back Figure 2 Each of the opposite sides of the housing 10 in the first direction is provided with a support rib 13 protruding beyond the corresponding side. The support rib 13 extends upward along the height direction from the corresponding support beam 12 to the first receiving portion 11a. The support rib 13 and the support beam 12 can be integrally formed or fixed together by connecting members. The support rib 13 not only enhances the bending stiffness of the housing 10 in the first direction, but also preferentially absorbs and disperses impact energy when the battery pack 100 is subjected to collisions or compression from both sides in the first direction, effectively protecting the battery pack 20 and high-voltage components, and improving the safety performance of the battery pack 100.

[0033] Continue to refer to Figure 2 The dimension of the support beam 12 in the second direction is W2 (in mm), and the dimension of the support rib 13 in the second direction is W3 (in mm), where 0.23 ≤ W3 / W2 ≤ 1. Preferably, 0.3 ≤ W3 / W2 ≤ 0.9. More preferably, 0.4 ≤ W3 / W2 ≤ 0.8. Alternatively, the ratio W3 / W2 can also be 0.5, 0.6, 0.7, or 0.75. The dimension of the support rib 13 in the second direction is its width. If W3 / W2 is too small, i.e., L2 / W1 is less than 0.23, the width of the support rib 13 is significantly smaller than that of the support beam 12. An excessively narrow support rib 13 has weak lateral stiffness and impact resistance, reducing the overall protective performance of the battery pack 100 in the first direction. It may also cause stress concentration in the connection area, posing a risk of structural failure. If W3 / W2 is too large, i.e., L2 / W1 is greater than 1, the excessively wide support rib 13 will unnecessarily encroach on the internal or external space of the battery pack 100, potentially causing interference with surrounding components and resulting in unnecessary weight and cost burdens. Based on the aforementioned ratio range, the protective function of the support rib 13 in the first direction, as well as efficient space utilization, are ensured.

[0034] Further, 90mm ≤ W2 ≤ 130mm. Preferably, 95mm ≤ W2 ≤ 125mm. More preferably, 100mm ≤ W2 ≤ 120mm. Alternatively, the value of W2 can also be 106mm, 112mm, or 118mm, etc. 50mm ≤ W3 ≤ 90mm. Preferably, 55mm ≤ W3 ≤ 85mm. More preferably, 60mm ≤ W3 ≤ 80mm. Alternatively, the value of W3 can also be 65mm, 70mm, 75mm, or 78mm, etc.

[0035] refer to Figure 4 The dimension of the Xth receiving portion 11x in the first direction is W1 (in mm), and the dimension of the (X-1)th receiving portion 11b in the first direction is W4 (in mm), where W4 > W1. This allows the Xth receiving portion 11x to be more fully embedded in the inherent space between the two supporting portions 101a and 101b of the support frame 101, thereby significantly improving the space utilization efficiency under the support frame without any structural modifications to the support frame, and ultimately achieving an effective increase in the overall capacity of the battery pack 100.

[0036] Continue to refer to Figure 4 The dimensions of the first receiving portion 11a to the (X-1)th receiving portion 11b are all the same in the first direction. That is, the receiving portions 11 located above the support beam 12 all have the same width, so that the load of each receiving portion 11 can be transmitted downward along a straight path and act directly on the support beam 12 on both sides of the Xth receiving portion 11x, reducing stress concentration caused by cross-sectional changes, improving the load-bearing efficiency of the battery pack 100, and maximizing the utilization of the space above the support beam 12.

[0037] Continue to refer to Figure 4 The dimension of the support beam 12 in the second direction is W2, in mm, and 0.38 ≤ (W4 - W1) / 2W2 ≤ 2.22. That is, the ratio of the single-sided protrusion dimension of the (X-1)th receiving portion 11b relative to the Xth receiving portion 11x to the width W2 of the support beam 12 is between 0.38 and 2.22. Preferably, 0.4 ≤ (W4 - W1) / 2W2 ≤ 2.2. More preferably, 0.6 ≤ (W4 - W1) / 2W2 ≤ 2. Alternatively, the value of the ratio (W4 - W1) / 2W2 can also be 0.8, 1.2, 1.4, 1.6, or 1.8, etc. If (W4-W1) / 2W2 is too small, i.e., (W4-W1) / 2W2 is less than 0.38, the available space above the support frame is not fully utilized to increase the volume of the housing 11 above the X housing 11x of the battery pack 100, resulting in insufficient utilization of the overall energy density of the battery pack 100. If (W4-W1) / 2W2 is too large, i.e., (W4-W1) / 2W2 is greater than 2.22, the protrusion dimension of the X-1 housing 11b is too large, or the protrusion dimension of the support beam 12 is too small. This causes excessive bending moment at the connection between the support beam 12 and the X housing 11x, increasing the risk of structural failure.

[0038] 900mm≤W1≤1200mm, preferably 950mm≤W1≤1150mm. More preferably, 1000mm≤W1≤1100mm. Alternatively, W1 can also be 1030mm, 1060mm, or 1090mm, etc. 1000mm≤W4≤1300mm, preferably 1050mm≤W4≤1250mm. More preferably, 1100mm≤W4≤1200mm. Alternatively, W4 can also be 1120mm, 1140mm, 1140mm, or 1180mm, etc. 90mm≤W2≤130mm. Preferably, 95mm≤W2≤125mm. More preferably, 100mm≤W2≤120mm. Alternatively, W2 can be 104mm, 108mm, 112mm or 116mm, etc.

[0039] Back Figure 3 The support beam 12 can be an integral structure that extends continuously along the second direction. As a continuous integral component, the support beam 12 can most effectively distribute and transfer the compressive stress transmitted from the multiple receiving parts 11 above along the second direction, providing the largest support area and ensuring the reliability of the connection.

[0040] refer to Figure 5 The support beam 12 may include multiple support segments 12a spaced apart in the second direction. The multiple support segments 12a can be arranged to align with the key load-bearing points of multiple receiving portions 11 above the support beam 12, thereby ensuring the support strength in the key areas while reducing the use of materials in non-critical areas, which helps to achieve a lightweight structure for the battery pack 100.

[0041] <Example Electrical Equipment> This utility model embodiment also provides an electrical device 200, which may include the battery pack 100 described above.

[0042] By way of example only, electrical equipment 200 can be, but is not limited to, vehicles, ships, aircraft, household appliances, and industrial equipment. For example, vehicles can be passenger cars, trucks, construction vehicles, etc.

[0043] In addition, the electrical equipment 200 can also be used for the storage, conversion and release of recyclable electrical energy.

[0044] In a non-restrictive example, refer to Figure 6 The electrical equipment 200 can power the loading vehicle 200, and the battery pack 100 can be used as a power source to power the loading vehicle 200.

[0045] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0046] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0047] It should be understood that although terms such as “first” or “second” may be used in this disclosure to describe various elements (such as a first direction and a second direction), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0048] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0049] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A battery pack adapted to be mounted on a support frame, the support frame comprising two support portions spaced apart in a first direction, each support portion extending along a second direction, characterized in that, The battery pack includes: The housing includes a first to an Nth receiving portion stacked sequentially from the top to the bottom of the housing along the height direction, wherein the first direction, the second direction, and the height direction are mutually perpendicular; and Multiple battery packs are respectively housed within the multiple receiving compartments, and each battery pack includes multiple batteries, wherein... The Xth receiving portion has a support beam protruding beyond the corresponding side on each of its opposite sides in the first direction. The support beam extends along the second direction. The Xth receiving portion includes a lower portion below the support beam in the height direction. The two support beams are adapted to support the two bearing portions respectively, such that the lower portion is located in the space between the two bearing portions, 2≤X≤N.

2. The battery pack according to claim 1, characterized in that, X is an integer greater than or equal to N / 2.

3. The battery pack according to claim 2, characterized in that, X equals N.

4. The battery pack according to claim 2 or 3, characterized in that, The support beam is flush with the top of the Xth receiving portion.

5. The battery pack according to claim 1, characterized in that, The dimension of the support beam in the second direction is L1, in mm, and the dimension of the Xth receiving part in the second direction is L2, in mm, where 0.48 ≤ L1 / L2 ≤ 0.

93.

6. The battery pack according to claim 5, characterized in that, 1000mm≤L1≤1400mm, and / or, 1500mm≤L2≤2100mm.

7. The battery pack according to claim 1, characterized in that, The support beam is provided with a plurality of fixing holes arranged at intervals along the second direction, each fixing hole through which fasteners pass to fix the support beam to the corresponding load-bearing part.

8. The battery pack according to claim 1, characterized in that, The dimension of the Xth receiving portion in the first direction is W1, in mm, and the dimension of the Xth receiving portion in the second direction is L2, in mm, where 1.23 ≤ L2 / W1 ≤ 2.

3.

9. The battery pack according to claim 8, characterized in that, 1500mm≤L2≤2100mm, and / or, 900mm≤W1≤1200mm.

10. The battery pack according to claim 1, characterized in that, The plurality of receiving portions are of the same size in the first direction.

11. The battery pack according to claim 10, characterized in that, The housing is provided with a support rib protruding beyond the corresponding side on each of the opposite sides in the first direction, and the support rib extends upward from the corresponding support beam along the height direction to the first receiving part.

12. The battery pack according to claim 11, characterized in that, The dimension of the support beam in the second direction is W2, in mm, and the dimension of the support rib in the second direction is W3, in mm, where 0.23 ≤ W3 / W2 ≤ 1.

13. The battery pack according to claim 12, characterized in that, 90mm≤W2≤130mm, and / or, 50mm≤W3≤90mm.

14. The battery pack according to claim 1, characterized in that, The dimension of the Xth receiving portion in the first direction is W1, in mm, and the dimension of the (X-1)th receiving portion in the first direction is W4, in mm, where W4 > W1.

15. The battery pack according to claim 14, characterized in that, The dimensions of the first receiving portion to the (X-1)th receiving portion are all the same in the first direction.

16. The battery pack according to claim 14 or 15, characterized in that, The dimension of the support beam in the second direction is W2, in mm, and 0.38≤(W4-W1) / 2W2≤2.

22.

17. The battery pack according to claim 16, characterized in that, 900mm≤W1≤1200mm, and / or, 1000mm≤W4≤1300mm, and / or, 90mm≤W2≤130mm.

18. The battery pack according to claim 1, characterized in that, The support beam is an integral structure that extends continuously along the second direction.

19. The battery pack according to claim 1, characterized in that, The support beam comprises a plurality of support segments spaced apart in the second direction.

20. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1 to 19.

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