Battery pack and electric device with same

Abstract

The utility model relates to battery technical field provides a kind of battery pack and the electric equipment with it. Battery pack includes box and ear plate. Box includes two side box plates parallel, side box plate includes plate body and recess, recess is recessed from plate body inward, recess includes recess bottom wall and multiple recess side walls, recess bottom wall is closer to the inside of box than plate body, multiple recess side walls connect recess bottom wall and plate body, and it is not perpendicular with recess bottom wall and plate body. Ear plate includes first section, second section and third section in turn and connect in longitudinal direction, second section is parallel with and fixedly connected in first recess side wall in multiple recess side walls, third section is parallel with and fixedly connected with recess bottom wall, first section is bent downward from the end of second section and forms hook structure away from third section. Recess can provide mounting space for ear plate, to reduce the size of ear plate protruding to the outside of box, which helps to compress the overall volume of battery pack, improve space utilization.

Description

Technical Field

[0001] This utility model relates to the field of marine battery technology, and in particular, to a battery pack and an electrical device having the same. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems, and other electrical equipment, increasingly higher requirements are being placed on battery packs that serve as their power or energy source. For batteries used in ships, they typically include a housing and a battery pack housed within the housing. In addition, the housing is equipped with lugs for attaching to spreader gear to install the battery pack into the electrical equipment.

[0003] In existing technologies, the ear plates are typically welded directly to the outer surface of the enclosure, which increases the overall size of the battery pack and consequently increases the space it occupies in electrical equipment. As a result, the battery pack requires more space in electrical equipment (such as vehicles or ships), leading to a reduction in the effective storage space and space utilization of the equipment. Utility Model Content

[0004] In view of this, the present invention provides a battery pack and an electrical device having the same, aiming to reduce the overall volume of the battery pack and improve the space utilization rate of the battery pack in the electrical device.

[0005] In a first aspect, the battery pack provided in this embodiment of the present invention includes a housing and ear plates. The housing includes two parallel side panels, each side panel including a plate and a recess. The recess is recessed inward from the plate and includes a bottom wall and multiple side walls. The bottom wall is closer to the inner side of the housing than the plate. The multiple side walls connect the bottom wall and the plate and are not perpendicular to the bottom wall and the plate. The ear plates include a first segment, a second segment, and a third segment connected sequentially along the longitudinal direction. The second segment is parallel to and fixedly connected to the first side wall of the multiple side walls. The third segment is parallel to and fixedly connected to the bottom wall. The first segment bends downward from the end of the second segment away from the third segment to form a hook-shaped structure.

[0006] Secondly, the electrical equipment provided in this embodiment of the present invention includes a battery pack as described in the first aspect.

[0007] The beneficial effects of the battery pack provided in the above embodiments of this utility model are as follows: By constructing recesses in the side panels, not only is the side panel's resistance to bending and deformation enhanced, but it also provides installation space for the ear plates, thereby reducing the size of the ear plates protruding outwards from the housing. This helps to reduce the overall volume of the battery pack, thus improving space utilization. Furthermore, the ear plates also balance installation convenience and connection strength. Specifically, the hook-like structure formed by the downward bending of the first section facilitates quick attachment to lifting tools, while the second and third sections are fixedly connected to the side and bottom walls of the recess, respectively, increasing the contact area between the ear plates and the side panels, thereby improving the strength of the connection and the stability of the overall structure. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0009] It should be understood that the following figures only show some embodiments of the present invention and should not be regarded as a limitation on the scope.

[0010] It should also be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0011] It should also be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0012] Figure 1 This is a structural schematic diagram of an electrical device according to an embodiment of the present utility model.

[0013] Figure 2 yes Figure 1 A schematic diagram of the battery pack structure.

[0014] Figure 3 yes Figure 2 An exploded view of the battery pack.

[0015] Figure 4 yes Figure 3 A schematic diagram of a portion of the battery pack.

[0016] Figure 5 yes Figure 4 An exploded view of a portion of the battery pack.

[0017] Figure 6 yes Figure 3 A schematic diagram of a portion of the battery pack.

[0018] Figure 7 yes Figure 3 A cross-sectional view of a portion of the battery pack.

[0019] Figure 8 yes Figure 2A schematic diagram of the battery pack structure.

[0020] Explanation of reference numerals in the attached drawings: Battery pack - 100; Box body - 10; Side panel - 11; Panel - 111; Recess - 112; Bottom wall of recess - 113; Side wall of recess - 114; First side wall of recess - 1141; Second side wall of recess - 1142; Flange - 115; Bottom guard plate - 12; Ear plate - 20; First section - 21; Second section - 22; Third section - 23; Fourth section - 24; Fifth section - 25; Battery pack - 30; Reinforcing plate - 40; First plate section - 41; Second plate section - 42; Step section - 43; Reinforcing beam - 50; Column - 60; Electrical equipment - 200 Detailed Implementation The embodiments of the present invention will now be described by way of example with reference to the accompanying drawings. It should be understood that there are many ways to implement the present invention, and it should not be construed as being limited to the embodiments described herein. The embodiments described herein are only for a more thorough and clear understanding of the present invention.

[0021] <Example Electrical Equipment> refer to Figure 1 This utility model provides an electrical device 200, which includes a battery pack 100.

[0022] By way of example only, electrical equipment 200 can be, but is not limited to, ships, vehicles, aircraft, household appliances, and industrial equipment. For example, ships can be container ships, inland waterway transport vessels, sightseeing boats, yachts, etc.

[0023] In a non-restrictive example, refer to Figure 1 The electrical equipment 200 can power the sightseeing boat 200, and the battery pack 100 can be used as a power source to power the sightseeing boat 200.

[0024] <Example Battery Pack> Figures 2 to 3 The battery pack 100 is shown. The battery pack 100 includes a battery group 30 composed of multiple batteries 300 connected in series and / or in parallel, a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage connectors or low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components. After the above components are placed in the housing 10 and sealed with a cover plate, a complete functional unit that can directly output electrical energy can be formed.

[0025] Battery 300 stores chemical energy and controlsably converts it into electrical energy. In a recyclable battery 300, the active materials can be reactivated by charging after discharge, allowing for continued use. It is understood that battery 300 can be a lithium-ion battery 300, a sodium-ion battery 300, or a nickel-metal hydride battery 300, etc.

[0026] It is understood that this utility model does not impose any particular limitation on the shape of the battery 300; the battery 300 may be cylindrical, flat, cuboid, or other shapes. (Reference) Figure 3 In the current embodiment, the battery 300 is a square battery 300. It can be understood that in other examples of this utility model, the battery 300 can also be implemented as a cylindrical battery 300 and a pouch battery 300.

[0027] The housing 10 serves as the physical carrier for the battery pack 30, BMS, thermal management system, and electrical connection system. Its design and manufacturing must meet the safety, reliability, and functionality requirements of the battery pack under different usage scenarios. Specifically, when the aforementioned components are fixed inside the housing 10, the housing 10 must ensure that they maintain a relatively stable position during the operation of the battery pack 100, avoiding damage to components or loosening of connections due to vibration, impact, or other factors.

[0028] It is understood that the structure of the housing 10 can be implemented in various ways, and this utility model does not impose any particular limitation on it. For example, the housing 10 can be a closed structure or a semi-closed structure.

[0029] As an example, the housing 10 may include a lower housing and a cover plate, with the bottom and cover plate overlapping each other. The lower housing and cover plate together define a receiving space for accommodating the battery pack 30. The lower housing generally has four side plates and a bottom plate. The four side plates can be integrally formed with the bottom plate around its perimeter, or they can be separately formed and fixedly connected.

[0030] The battery pack 100 also includes an isolation plate (not shown in the figure). Both the battery 300 and the isolation plate are located in the housing 10. The isolation plate is located on the side of the battery 300 away from the bottom plate of the housing 10, separating the battery 300 from other devices located above the battery 300, thus playing an isolation role.

[0031] It is understood that the material of the housing 10 can be implemented in various ways, and this utility model does not impose any particular limitation on it. For example, the material of the housing 10 can be metal materials such as steel and aluminum alloy, or it can be glass fiber reinforced composite material, carbon fiber reinforced composite material, etc.

[0032] It is understood that the shape of the box 10 can be implemented in various ways, and this utility model does not impose any particular limitation on it. For example, the shape of the box 10 can be a cylinder, a cuboid, a cube, etc.

[0033] refer to Figures 3 to 5 The battery pack 100 also includes ear plates 20. The housing 10 includes two parallel side panels 11. Each side panel 11 includes a plate 111 and a recess 112. The recess 112 is recessed inward from the plate 111. The recess 112 includes a recess bottom wall 113 and a plurality of recess side walls 114. The recess bottom wall 113 is closer to the inside of the housing 10 than the plate 111. The plurality of recess side walls 114 connect the recess bottom wall 113 and the plate 111 and are not perpendicular to the recess bottom wall 113 and the plate 111. The ear plate 20 includes a first segment 21, a second segment 22 and a third segment 23 connected in sequence along the longitudinal direction. The third segment 23 and the second segment 22 are parallel to and fixedly connected to the first recessed sidewall 1141 among a plurality of recessed sidewalls 114. The third segment 23 is parallel to and fixedly connected to the bottom wall 113 of the recess. The first segment 21 bends downward from the end of the second segment 22 away from the third segment 23 and forms a hook-shaped structure.

[0034] By constructing recesses 112 on the side panel 11, not only is the side panel 11's resistance to bending and deformation enhanced, but it also provides installation space for the ear plate 20, thereby reducing the size of the ear plate 20 protruding outward from the housing 10. This helps to compress the overall volume of the battery pack 100 and improve space utilization. Furthermore, the ear plate 20 also balances ease of installation and connection strength. Specifically, the hook-shaped structure formed by the downward bending of the first segment 21 facilitates quick attachment with a lifting device, while the second segment 22 and the third segment 23 are fixedly connected to the side wall and bottom wall 113 of the recess 112, respectively, which increases the contact area between the ear plate 20 and the side panel 11, thereby improving the strength of the connection and the stability of the overall structure.

[0035] It should be noted that in the accompanying drawings of this utility model, arrows Z+ and Z- can be used to indicate opposite sides in the height direction, arrows X+ and X- can be used to indicate opposite sides in the thickness direction, and arrows Y+ and Y- can be used to indicate opposite sides in the width direction. The height direction, thickness direction, and width direction are perpendicular to each other.

[0036] Continue to refer to Figures 3 to 5The ear plate 20 also includes a fourth section 24 located on the side of the third section 23 opposite to the second section 22. The fourth section 24 is parallel to and fixedly connected to the second recessed sidewall 1142 among the plurality of recessed sidewalls 114. The first recessed sidewall 1141 and the second recessed sidewall 1142 are opposite each other in the height direction, and the first recessed sidewall 1141 is higher than the second recessed sidewall 1142. By fixing the fourth section 24 and the second recessed sidewall 1142 of the ear plate 20, the contact area between the ear plate 20 and the side box plate 11 can be further increased, thereby improving the strength of the connection. In addition, since multiple parts of the ear plate 20 are fixedly connected to the side box plate 11, the ear plate 20 can effectively distribute the longitudinal load during hoisting, transportation or operation, thereby improving the impact resistance of the connection and the safety of the overall structure.

[0037] Continue to refer to Figures 3 to 5 The lug plate 20 also includes a fifth section 25 located on the side of the fourth section 24 opposite to the third section 23. The fifth section 25 is parallel to and fixedly connected to the plate body 111. The connection between the fifth section 25 of the lug plate 20 and the plate body 111 not only increases the contact area between the lug plate 20 and the side box plate 11, improving the strength of the connection and the stability of the overall structure, but also increases the load transmission path. Specifically, the load of the lug plate 20 can be transmitted to the recessed side wall 114 through the second section 22 and the fourth section 24, to the recessed bottom wall 113 through the third section 23, and to the plate body 111 through the fifth section 25. This method disperses stress and avoids localized stress concentration, thus improving the durability and reliability of the lug plate 20 under lifting, transportation, or impact conditions.

[0038] refer to Figure 7 The fifth segment 25 protrudes from the plate 111 with a dimension of D1 mm, and the first segment 21 protrudes from the plate 111 with a dimension of D2 mm. 0.18 ≤ D1 mm / D2 mm ≤ 1.2. For example, D1 mm / D2 mm can be 0.18, 0.22, 0.3, 0.35, 0.42, 0.5, 0.55, 0.6, 0.7, 0.85, 0.9, 0.95, 1, 1.1 or 1.2.

[0039] If the ratio of the size of the fifth segment 25 protruding from the plate 111 to the size of the first segment 21 protruding from the plate 111 is too small, i.e., less than 0.18, then the size of the first segment 21 protruding from the plate 111 is too large. This would result in a large protrusion of the first segment 21 outward from the housing 10, which is detrimental to the space utilization of the battery pack 100 in the electrical equipment. If the ratio of the size of the fifth segment 25 protruding from the plate 111 to the size of the first segment 21 protruding from the plate 111 is too large, i.e., greater than 1.2, then the size of the first segment 21 protruding from the plate 111 is too small, while the size of the fifth segment 25 protruding from the plate 111 is too large. This would not only be detrimental to the connection between the lifting device and the ear plate 20 during hoisting operations, but would also result in a large protrusion of the fifth segment 25 outward from the housing 10, which would also be detrimental to the space utilization of the battery pack 100 in the electrical equipment.

[0040] According to the battery pack 100 provided by this utility model, the ratio of the size of the fifth segment 25 protruding from the plate 111 to the size of the first segment 21 protruding from the plate 111 is limited to the above-mentioned numerical range. This can limit the size of the ear plate 20 protruding outward from the housing 10, thereby helping to compress the overall volume of the battery pack 100 and improve the space utilization rate of the battery pack 100 in the electrical equipment. It also helps to connect the lifting tool with the ear plate 20 during hoisting operations.

[0041] As one possible implementation, D1 can satisfy: 1.5 mm ≤ D1 mm ≤ 5 mm. For example, D1 mm can be 1.5 mm, 1.8 mm, 2 mm, 2.3 mm, 2.5 mm, 2.7 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm.

[0042] As one possible implementation, D2 can satisfy: 1.5 mm ≤ D2 mm ≤ 5 mm. For example, D2 mm can be 1.5 mm, 1.8 mm, 2 mm, 2.3 mm, 2.5 mm, 2.7 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm.

[0043] refer to Figure 8 The ear plate 20 has a width dimension of D3 mm, and the maximum width dimension of the recess 112 is D4 mm, where 0.5 ≤ D3 mm / D4 mm ≤ 0.85. For example, D3 mm / D4 mm can be 0.5, 0.53, 0.56, 0.59, 0.62, 0.65, 0.68, 0.72, 0.76, 0.8, or 0.85.

[0044] If the ratio of the width dimension of the ear plate 20 to the maximum width dimension of the recess 112 is too small (less than 0.5), the width dimension of the ear plate 20 is small, which reduces the contact area between the ear plate 20 and the side box plate 11, negatively impacting the strength of the connection between the ear plate 20 and the side box plate 11 and the overall structural stability. If the ratio of the width dimension of the ear plate 20 to the maximum width dimension of the recess 112 is too large (greater than 0.85), the side wall 114 and bottom wall 113 of the recess are nearly perpendicular, increasing the difficulty of stamping or machining the recess 112 and the difficulty of subsequent connection operations between the ear plate 20 and the side box plate 11. Furthermore, the closer the side wall 114 and bottom wall 113 of the recess are to being perpendicular, the weaker the rigidity of the side box plate 11, leading to a decrease in its resistance to bending and deformation.

[0045] According to the battery pack 100 provided by this utility model, the ratio of the width dimension of the ear plate 20 to the maximum width dimension of the recess 112 is limited to the above-mentioned numerical range. This ensures the contact area between the ear plate 20 and the side box plate 11, thereby ensuring the strength of the connection between the ear plate 20 and the side box plate 11 and the stability of the overall structure. It also avoids excessively increasing the processing of the recess 112 and the difficulty of subsequent connection operations between the ear plate 20 and the side box plate 11. In addition, it also benefits the structural rigidity of the side box plate 11, giving it excellent bending and deformation resistance.

[0046] As one possible implementation, D5 can satisfy: 50 mm ≤ D3 mm ≤ 80 mm. For example, D3 mm can be 50 mm, 53 mm, 56 mm, 59 mm, 62 mm, 65 mm, 68 mm, 72 mm, 74 mm, 76 mm or 80 mm.

[0047] As one possible implementation, D6 can satisfy: 90 mm ≤ D4 mm ≤ 150 mm. For example, D4 ​​mm can be 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, 116 mm, 122 mm, 128 mm, 130 mm, 135 mm, 140 mm, 145 mm or 150 mm.

[0048] refer to Figure 8 In the height direction, the distance from the recess 112 to the top of the side panel 11 is H1 mm, and the size of the side panel 11 is H2 mm, 0.04≤H1 mm / H2 mm≤0.1. For example, H1 mm / H2 mm can be 0.04, 0.045, 0.05, 0.055, 0.06, 0.065, 0.07, 0.078, 0.086 or 0.1.

[0049] If the ratio of the distance from the recess 112 in the vertical direction to the top of the side panel 11 to the vertical dimension of the side panel 11 is small, i.e., less than 0.04, then the distance from the recess 112 in the vertical direction to the top of the side panel 11 is small. This causes the recess 112 to be closer to the top of the side panel 11, thereby weakening the rigidity of the upper edge of the side panel 11 and increasing the processing difficulty of the recess 112. If the ratio of the distance from the recess 112 in the vertical direction to the top of the side panel 11 to the vertical dimension of the side panel 11 is large, i.e., greater than 0.1, then the distance from the recess 112 in the vertical direction to the top of the side panel 11 is small. This causes the recess 112 to be closer to the bottom of the side panel 11, thereby weakening the rigidity of the lower edge of the side panel 11 and increasing the processing difficulty of the recess 112.

[0050] According to the battery pack 100 provided by this utility model, the ratio of the distance from the recess 112 to the top of the side panel 11 in the vertical direction to the dimension of the side panel 11 in the vertical direction is limited to the above-mentioned numerical range. This not only ensures the rigidity of the upper and lower edges of the side panel 11, but also avoids excessively increasing the processing difficulty of the recess 112.

[0051] As one possible implementation, H1 can satisfy: 10 mm ≤ H1 mm ≤ 20 mm. For example, H1 mm can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm or 20 mm.

[0052] As one possible implementation, H2 can satisfy: 200 mm ≤ H2 mm ≤ 250 mm. For example, H2 mm can be 200 mm, 205 mm, 210 mm, 215 mm, 220 mm, 225 mm, 230 mm, 235 mm, 240 mm, 245 mm or 250 mm.

[0053] It is understood that this utility model does not impose a particular limitation on the number of recesses 112. As an example, see reference... Figure 3 and Figure 8 Each side panel 11 has two recesses 112, which are spaced apart in the width direction. In this way, each side panel 11 can fix two ear plates 20. Compared with a single ear plate 20, fixing two ear plates 20 to each side panel 11 can evenly distribute the longitudinal load, reduce the stress peak at the connection point between the ear plate 20 and the side panel 11, thereby avoiding stress concentration and improving the stability and safety of the hoisting process.

[0054] Continue to refer to Figure 8In the width direction, the distance between the two recesses 112 is D5 mm, and the size of the side panel 11 is D6 mm, 0.35≤D5 mm / D6 mm≤0.48. For example, D5 mm / D6 mm can be 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.42, 0.44, 0.46 or 0.48.

[0055] If the ratio of the width-direction spacing of the two recesses 112 to the width-direction dimension of the side panel 11 is too small (less than 0.35), the width-direction spacing of the two recesses 112 is small. This results in an overly concentrated load on the side panel 11 transmitted from the ear plate 20, significantly increasing the risk of localized deformation or fatigue damage to the side panel 11. Conversely, if the ratio of the width-direction spacing of the two recesses 112 to the width-direction dimension of the side panel 11 is too large (greater than 0.48), the width-direction spacing of the two recesses 112 is large. This results in an overly dispersed load on the side panel 11 transmitted from the ear plate 20, potentially causing warping or instability in the middle of the side panel 11.

[0056] According to the battery pack 100 provided by this utility model, by limiting the ratio of the distance between the two recesses 112 in the width direction to the dimension of the side box plate 11 in the width direction to the above-mentioned numerical range, it can be ensured that the load transmitted from the ear plate 20 to the side box plate 11 is evenly distributed in the width direction, thereby ensuring the stability and safety of the hoisting process.

[0057] As one possible implementation, D5 can satisfy: 200 mm ≤ D5 mm ≤ 250 mm. For example, D5 mm can be 200 mm, 205 mm, 210 mm, 215 mm, 220 mm, 225 mm, 230 mm, 235 mm, 240 mm, 245 mm or 250 mm.

[0058] As one possible implementation, D6 can satisfy: 520 mm ≤ D6 mm ≤ 580 mm. For example, D6 mm can be 520 mm, 525 mm, 530 mm, 535 mm, 540 mm, 545 mm, 550 mm, 555 mm, 560 mm, 565 mm, 570 mm, 575 mm or 580 mm.

[0059] refer to Figure 8 In the width direction, the minimum distance between the two recesses 112 and the edge of the side panel 11 in the width direction is D7 mm, 0.055≤D7 mm / D6 mm≤0.095. For example, D7 mm / D6 mm can be 0.055, 0.06, 0.065, 0.07, 0.075, 0.08, 0.085, 0.09, 0.092 or 0.095.

[0060] If the ratio of the minimum distance from the two recesses 112 along the width direction to the side panel 11 to the width dimension of the side panel 11 is too small (less than 0.055), the minimum distance from the recesses 112 along the width direction to the side panel 11 is small. This results in the load transmitted from the two lugs 20 to the side panel 11 being too dispersed, which can easily lead to swaying or shaking during hoisting. If the ratio of the minimum distance from the two recesses 112 along the width direction to the side panel 11 to the width dimension of the side panel 11 is too large (greater than 0.095), the minimum distance from the two recesses 112 along the width direction to the side panel 11 is too large. This results in the load transmitted from the lugs 20 to the side panel 11 being too concentrated, which will damage the area in the side panel 11 where the two recesses 112 are located.

[0061] According to the battery pack 100 provided by this utility model, the ratio of the minimum distance from the two recesses 112 to the side box plate 11 in the width direction to the dimension of the side box plate 11 in the width direction is limited to the above-mentioned numerical range, which can minimize the difference in load transmitted from the two ear plates 20 to the side box plate 11, thereby ensuring the stability and safety of the hoisting process.

[0062] As one possible implementation, D7 can satisfy: 30 mm ≤ D7 mm ≤ 50 mm. For example, D7 mm can be 30 mm, 32 mm, 34 mm, 36 mm, 38 mm, 40 mm, 42 mm, 44 mm, 46 mm, 48 mm or 50 mm.

[0063] refer to Figure 3 and Figure 6 The housing 10 also includes a reinforcing plate 40, which is located inside the side panel 11 and fixedly connected to the bottom wall 113 of the recess. By connecting the reinforcing plate 40 to the side panel 11, the rigidity of the housing 10 can be improved, increasing the housing 10's ability to resist compression and impact deformation under lifting, transportation, or collision conditions, thereby ensuring the structural integrity and safety reliability of the battery pack 100.

[0064] It is understood that in the current embodiment, the reinforcing plate 40 is fixedly connected to the bottom wall 113 of the recess. Prospectively, in other embodiments, the reinforcing plate 40 may be welded to both the bottom wall 113 and the side wall 114 of the recess. This implementation increases the contact area between the reinforcing plate 40 and the side panel 11, thereby improving the strength of the connection between the reinforcing plate 40 and the side panel 11 and the overall structural stability.

[0065] refer to Figure 3 and Figure 6The orthographic projection of the reinforcing plate 40 along the thickness direction of the side panel 11 at least partially overlaps with the orthographic projection of the ear plate 20 along the thickness direction. According to the battery pack 100 provided by this invention, the load of the ear plate 20 can be transferred to the reinforcing plate 40 through the side panel, thereby reducing the load borne by the side panel 11. This implementation enhances the rigidity and deformation resistance of the housing 10, thus ensuring the structural stability of the battery pack 100.

[0066] Continue to refer to Figure 3 and Figure 6 The housing 10 also includes a reinforcing beam 50, which is fixedly connected to the side panel 11. According to the battery pack 100 provided by this invention, the load of the ear plate 20 can be transferred to the reinforcing beam 50 through the side panel, thus reducing the load borne by the side panel 11. This implementation enhances the rigidity and deformation resistance of the housing 10, thereby ensuring the structural stability of the battery pack 100.

[0067] refer to Figure 6 and Figure 7 The reinforcing plate 40 is fixedly connected to the reinforcing beam 50. By fixing the reinforcing plate 40 to the reinforcing beam 50, the rigidity of the housing 10 can be improved, and the housing 10 can be increased to resist the squeezing and impact deformation under lifting, transportation or collision conditions, thereby ensuring the structural integrity and safety reliability of the battery pack 100.

[0068] refer to Figure 6 The box body 10 also includes two columns 60 spaced apart along the width direction of the side box panel 11, and a reinforcing beam 50 extending along the width direction with both ends of the reinforcing beam 50 fixedly connected to the two columns 60. The reinforcing beam 50 can transfer the load it bears to the columns 60, thereby avoiding excessive stress concentration on the side box panel 11 and other components, thus improving the overall rigidity and stability of the box body 10 during hoisting and transportation.

[0069] refer to Figure 7 The side panel 11 has an inwardly bent flange 115 at its top, and the reinforcing plate 40 extends inward beyond the flange 115 in the thickness direction. By providing the inwardly bent flange 115 on the side panel 11, the rigidity of the side panel 11 is enhanced, and a support platform is constructed on the top of the housing 10 to support the top cover of the housing 10. Under this premise, the reinforcing plate 40 of the battery pack 100 provided by this utility model extends inward beyond the flange 115 in the thickness direction, which limits the space occupied by the reinforcing plate 40 within the housing 10. In this way, the reinforcing plate 40 and the flange 115 will occupy the same space in the thickness direction, thus ensuring space utilization.

[0070] Continue to refer to Figure 7The reinforcing plate 40 includes a first plate portion 41, a second plate portion 42, and a stepped portion 43. The first plate portion 41 and the second plate portion 42 are parallel to the side panel 11 and are not coplanar. The stepped portion 43 connects the first plate portion 41 and the second plate portion 42. By constructing the first plate portion 41, the second plate portion 42, and the stepped portion 43 connecting them in sequence, the rigidity of the reinforcing plate 40 itself can be increased, thereby enhancing its resistance to deformation and ensuring the structural stability of the reinforcing plate 40.

[0071] It is understood that the number of steps 43 can be one or more. In the current embodiment, the first plate portion 41 and the second plate portion 42 are connected by one step portion 43. Conversely, when the distance between the first plate portion 41 and the second plate portion 42 in the width direction is large, that is, when the distance between the bottom wall 113 of the recess and the reinforcing beam 50 in the width direction is large, the first plate portion 41 and the second plate portion 42 can be connected by multiple steps 43. When the reinforcing plate 40 is constructed with multiple steps 43, the rigidity of the reinforcing plate 40 itself can be further increased.

[0072] refer to Figure 3 The enclosure 10 includes a bottom protective plate 12, which is perpendicular to the side enclosure plates 11. A reinforcing beam 50 is welded to the bottom protective plate 12. By being fixed to the bottom protective plate 12, the reinforcing beam 50 can transfer the load from the side enclosure plates 11 to the bottom protective plate 12, thereby improving the structural stability of the enclosure 10.

[0073] refer to Figure 3 and Figure 8 The battery pack 100 also includes a battery group 30, and the orthographic projection of the ear plates 20 in the thickness direction of the side panel 11 falls on the battery group 30. In this way, the two ear plates 20 can bear the load of the battery group 30 more evenly, thereby avoiding swaying or shaking during hoisting and ensuring the stability and safety of the hoisting process.

[0074] It should be understood that the term "comprising" and its variations used in this utility model are open-ended, meaning "including but not limited to". The term "according to" means "at least in part according to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least another embodiment".

[0075] It should be understood that although terms such as "first" or "second" may be used in this invention to describe various elements (such as the first paragraph and the second paragraph), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0076] The scope of protection of this utility model is not limited to the above embodiments. Any variations or substitutions that can be conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A battery pack (100), characterized in that, include: A housing (10) includes two parallel side panels (11), each side panel (11) comprising a plate (111) and a recess (112), the recess (112) being recessed inward from the plate (111), the recess (112) comprising a bottom wall (113) and a plurality of side walls (114), the bottom wall (113) being closer to the inner side of the housing (10) than the plate (111), the plurality of side walls (114) connecting the bottom wall (113) and the plate (111), and not perpendicular to the bottom wall (113) and the plate (111); and The ear plate (20) includes a first segment (21), a second segment (22) and a third segment (23) connected in sequence along the longitudinal direction. The second segment (22) is parallel to and fixedly connected to the first recess sidewall (1141) of the plurality of recess sidewalls (114). The third segment (23) is parallel to and fixedly connected to the bottom wall (113) of the recess. The first segment (21) bends downward from the end of the second segment (22) away from the third segment (23) to form a hook-shaped structure.

2. The battery pack (100) according to claim 1, characterized in that, The ear plate (20) further includes a fourth segment (24) located on the side of the third segment (23) away from the second segment (22). The fourth segment (24) is parallel to and fixedly connected to the second recessed sidewall (1142) of the plurality of recessed sidewalls (114). The first recessed sidewall (1141) and the second recessed sidewall (1142) are opposite each other in the height direction, and the first recessed sidewall (1141) is higher than the second recessed sidewall (1142).

3. The battery pack (100) according to claim 2, characterized in that, The ear plate (20) also includes a fifth section (25) located on the side of the fourth section (24) opposite to the third section (23), the fifth section (25) being parallel to and fixedly connected to the plate body (111).

4. The battery pack (100) according to claim 3, characterized in that, The fifth segment (25) protrudes from the plate (111) by a dimension of D1 mm, the first segment (21) protrudes from the plate (111) by a dimension of D2 mm, 0.18≤D1 mm / D2 mm≤1.2, and / or, 1.5 mm≤D1 mm≤5 mm, and / or, 1.5 mm≤D2 mm≤5 mm.

5. The battery pack (100) according to claim 1, characterized in that, The ear plate (20) has a width dimension of D3 mm, and the recess (112) has a maximum width dimension of D4 mm, 0.5 ≤ D3 mm / D4 mm ≤ 0.85, and / or, 50 mm ≤ D3 mm ≤ 80 mm, and / or, 90 mm ≤ D4 mm ≤ 150 mm.

6. The battery pack (100) according to claim 1, characterized in that, In the height direction, the distance from the recess (112) to the top of the side panel (11) is H1 mm, and the size of the side panel (11) is H2 mm, 0.04≤H1 mm / H2 mm≤0.1, and / or, 10 mm≤H1 mm≤20 mm, and / or, 200 mm≤H2 mm≤250 mm.

7. The battery pack (100) according to claim 1, characterized in that, Each side panel (11) is provided with two recesses (112) spaced apart in the width direction.

8. The battery pack (100) according to claim 7, characterized in that, In the width direction, the distance between the two recesses (112) is D5 mm, and the size of the side panel (11) is D6 mm, 0.35≤D5 mm / D6 mm≤0.48, and / or, 200 mm≤D5 mm≤250 mm, and / or, 520 mm≤D6 mm≤580 mm.

9. The battery pack (100) according to claim 8, characterized in that, In the width direction, the minimum distance between the two recesses (112) and the edge of the side panel (11) in the width direction is D7 mm, 0.055≤D7 mm / D6 mm≤0.095, and / or, 30 mm≤D7 mm≤50 mm.

10. The battery pack (100) according to claim 1, characterized in that, The housing (10) also includes a reinforcing plate (40), which is located inside the side panel (11) and is fixedly connected to the bottom wall (113) of the recess (112).

11. The battery pack (100) according to claim 10, characterized in that, The orthographic projection of the reinforcing plate (40) along the thickness direction of the side box plate (11) at least partially overlaps with the orthographic projection of the ear plate (20) along the thickness direction.

12. The battery pack (100) according to claim 10, characterized in that, The box body (10) also includes a reinforcing beam (50), which is fixedly connected to the side box plate (11).

13. The battery pack (100) according to claim 12, characterized in that, The reinforcing plate (40) is fixedly connected to the reinforcing beam (50).

14. The battery pack (100) according to claim 13, characterized in that, The box body (10) also includes two columns (60) spaced apart along the width direction of the side box plate (11), and the reinforcing beam (50) extends along the width direction and the two ends of the reinforcing beam (50) are fixedly connected to the two columns (60).

15. The battery pack (100) according to claim 10, characterized in that, The top of the side panel (11) is provided with an inwardly bent flange (115), and the reinforcing plate (40) extends inward beyond the flange (115) in the thickness direction of the side panel (11).

16. The battery pack (100) according to claim 10, characterized in that, The reinforcing plate (40) includes a first plate portion (41), a second plate portion (42), and a step portion (43). The first plate portion (41) and the second plate portion (42) are parallel to the side box plate (11) and are not coplanar. The step portion (43) connects the first plate portion (41) and the second plate portion (42).

17. The battery pack (100) according to claim 13, characterized in that, The box body (10) includes a bottom protective plate (12) which is perpendicular to the side box plate (11), and the reinforcing beam (50) is welded to the bottom protective plate (12).

18. The battery pack (100) according to claim 17, characterized in that, It also includes a battery pack (30), and the orthographic projection of the ear plate (20) in the thickness direction of the side box plate (11) falls on the battery pack (30).

19. The battery pack (100) according to claim 10, characterized in that, The reinforcing plate (40) is welded to the bottom wall (113) and the side wall (114) of the recess.

20. An electrical appliance (200), characterized in that, The battery pack (100) includes any one of claims 1 to 19.

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