Battery pack and electric device with same

Abstract

The utility model relates to battery technology field provides a kind of battery pack and the electric equipment with it. Battery pack includes box and the multiple batteries received in it. Box includes frame and box board. Frame includes multiple columns and multiple frame body, each column extends along height direction, and each frame body extends between two adjacent columns, and the both ends of frame body are respectively fixed to two columns. Box board is covered in the outside of frame, and includes multiple side walls and a bottom wall, each side wall is fixedly connected with two adjacent columns and the frame body extending between two columns, and the bottom wall is fixedly connected with multiple columns and multiple frame body. In height direction, the size of column is H1 mm, the size of frame body is H2 mm, 0.15≤H2 mm / H1 mm≤0.65. While ensuring the overall rigidity and structural stability of frame, the weight and material cost of component can also be reduced, which helps the lightweight and energy density of battery pack.

Description

Technical Field

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

[0002] Battery performance directly affects the range, safety, and lifespan of electrical equipment. As a key component carrying the battery modules, the battery pack not only needs to provide robust physical protection for the batteries and electrical components to withstand the complex operating conditions such as shocks and vibrations that electrical equipment may encounter during operation, but also faces a more complex working environment, especially when battery packs are used for marine power supply. Vibrations and shocks caused by wave impacts and ship maneuvers during navigation place even higher demands on the stability of the battery pack's internal structure.

[0003] However, in related technologies, the battery pack frame is constructed using profiles connected by welding or bolts to form a load-bearing frame. While this structure possesses a certain load-bearing capacity, it also has significant shortcomings. Specifically, to meet rigidity and strength requirements, the profile cross-section is often large, which occupies a significant amount of internal space within the battery pack housing, thus limiting the arrangement volume of the battery modules and resulting in a reduction in the overall energy density of the battery pack. Utility Model Content

[0004] In view of this, the present invention provides a battery pack that aims to reduce the space occupied by the casing and increase the energy density of the entire battery pack.

[0005] The battery pack provided by this utility model includes a housing and a plurality of batteries housed therein. The housing includes a frame and a panel. The frame includes a plurality of uprights and a plurality of frames, each upright extending along the height direction, and each frame extending between two adjacent uprights, with both ends of the frame fixed to the two uprights respectively. The panel covers the outside of the frame and includes a plurality of side walls and a bottom wall. Each side wall is fixedly connected to two adjacent uprights and the frame extending between the two uprights, and the bottom wall is fixedly connected to the plurality of uprights and the plurality of frames. In the height direction, the dimensions of the uprights are H1 mm, the dimensions of the frames are H2 mm, and 0.15 ≤ H2 mm / H1 mm ≤ 0.65.

[0006] Secondly, the electrical equipment provided by this utility model includes the battery pack of the first aspect.

[0007] The beneficial effects of the battery pack provided in the above embodiments of this utility model are as follows: By limiting the ratio of the height dimension of the frame to the height dimension of the column to the above-mentioned value range, it is possible to ensure the connection strength between the frame and the sidewall, thereby ensuring the overall rigidity and structural stability of the frame and giving it excellent load-bearing and impact resistance. At the same time, it is possible to ensure that the height dimension of the frame is not too large, thereby reducing the weight of the components and material costs, achieving lightweighting of the battery pack, and improving the energy density of the battery pack. 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 2 A schematic diagram of a portion of the battery pack.

[0016] Figure 5 yes Figure 2 A schematic diagram of the battery pack frame structure.

[0017] Figure 6 yes Figure 5 A schematic diagram of a part of the structure.

[0018] Figure 7 yes Figure 5 A structural schematic diagram of a portion of the longitudinal beam.

[0019] Figure 8 yes Figure 5 A schematic diagram of a part of the structure.

[0020] Figure 9 yes Figure 5A schematic diagram of a part of the structure.

[0021] Explanation of reference numerals in the attached drawings: Electrical equipment - 2000; Battery pack - 1000; Battery - 200; Box - 100; Frame - 10; Column - 11; First column bend - 111; Second column bend - 112; Third column bend - 113; Fourth column bend - 114; Frame - 12; Longitudinal beam - 13; Longitudinal beam positioning part - 136; Longitudinal beam overlap - 135; First longitudinal beam bend - 131; Second longitudinal beam bend - 132; Third longitudinal beam bend - 133; Fourth longitudinal beam bend - 134; Main structure - 137; First main structure - 1371; Second main structure - 1372; Transition part - 138; Longitudinal beam weight reduction hole - 139; Box panel - 20; Side wall - 21; Bottom wall - 22; Crossbeam - 14; First crossbeam bend - 141; Second crossbeam bend - 142; Third crossbeam bend - 143; Fourth crossbeam bend - 144; First flange - 1401; Second flange - 1402; Third flange - 1403; Crossbeam weight reduction hole - 145; Positioning pin - 31; Pin seat - 32; Partition beam - 15; First partition beam bend - 151; Second partition beam bend - 152; Third partition beam bend - 153; Fourth partition beam bend - 154; Fifth partition beam bend - 155; Fourth flange - 1504; Fifth flange - 1505; Sixth flange - 1506; Seventh flange - 1507; Eighth flange - 1508. Detailed Implementation

[0022] 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.

[0023] <Example Electrical Equipment> refer to Figure 1 This utility model provides an electrical device 2000, which includes a battery pack 1000.

[0024] By way of example only, electrical equipment 2000 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.

[0025] In a non-restrictive example, refer to Figure 1 The electrical equipment 2000 can power the sightseeing boat 2000, and the battery pack 1000 can be used as a power source for the sightseeing boat 2000.

[0026] <Example Battery Pack> Figures 2 to 4 A battery pack 1000 is shown. The battery pack 1000 includes a housing 100 and a plurality of batteries 200 housed therein, which may be connected in series and / or in parallel. The batteries 200 store chemical energy and controllably convert chemical energy into electrical energy. In recyclable batteries 200, the active materials can be reactivated by charging after discharge for continued use.

[0027] It is understood that in this embodiment of the present invention, battery 200 refers to an energy storage device that can be repeatedly charged and discharged. Battery 200 can be lithium-ion battery 200, sodium-ion battery 200, nickel-metal hydride battery 200, etc.

[0028] It is understood that this utility model does not impose any particular limitation on the shape of the battery 200; the battery 200 may be cylindrical, flat, cuboid, or other shapes. (Reference) Figure 4 In the current embodiment, the battery 200 is a square battery 200. It can be understood that in other examples of this utility model, the battery 200 can also be implemented as a cylindrical battery 200 and a pouch battery 200.

[0029] In addition, the battery pack 1000 also includes a battery management system (BMS) and an electrical connection system (e.g., high-voltage connectors and low-voltage connectors), which are also located in the housing 100.

[0030] The battery management system (BMS) monitors and manages the operating status of battery 200, such as voltage, current, and temperature. When the BMS detects an abnormal operating status of battery 200, it executes corresponding protection measures according to the set protection strategy. For example, when the temperature of battery 200 is too high, the BMS will reduce the charging or discharging rate to ensure that the temperature of battery 200 is maintained within a safe range.

[0031] The battery management system also includes a signal acquisition component for acquiring voltage and temperature signals of each of the 200 individual batteries and transmitting the data to the battery management system, providing real-time data for monitoring the status and protecting the safety of the batteries 200. For example, the signal acquisition component can be a flexible printed circuit (FPC), a printed circuit board (PCB), or a flexible flat cable (FCC).

[0032] The high-voltage connector is responsible for transmitting high-voltage, high-current main energy paths, handling the energy collection of battery 200, and providing electrical connections between battery pack 1000 and external high-voltage systems. The low-voltage connector is used to transmit low-voltage, low-current signals and control commands, primarily connecting the slave control unit of the battery management system to various sensors, and transmitting key monitoring data such as battery 200 voltage and temperature to the main controller of the battery management system in real time.

[0033] Since the battery 200, battery management system and electrical connection system are all located in the housing 100, this places high demands on the internal space layout of the battery pack 1000: the housing 100's space must be utilized as efficiently as possible while ensuring the normal operation of each component, so as to improve the overall energy density of the battery pack 1000.

[0034] refer to Figures 3 to 5 The battery pack 1000 provided by this utility model includes a frame 10 and a box panel 20. The frame 10 includes four uprights 11 and three frame bodies 12. Each upright 11 extends along the height direction. The four uprights 11 are respectively arranged at the four parallel edges of a cuboid. The two ends of each frame body 12 are respectively fixed to a pair of adjacent uprights 11, and the three frame bodies 12 are respectively fixed to different pairs of adjacent uprights 11. The box panel 20 covers the outside of the frame 10 and includes four side walls 21 and a bottom wall 22. The four side walls 21 respectively form the four sides of the cuboid, and the bottom wall 22 forms the bottom surface of the cuboid. Each side wall 21 is fixedly connected to a pair of adjacent uprights 11, and the four side walls 21 are respectively fixed to different pairs of adjacent uprights 11. Three of the four side walls 21 are respectively fixedly connected to the three frame bodies 12, and the bottom wall 22 is fixedly connected to the four uprights 11 and the three frame bodies 12. In the height direction, the dimension of the column 11 is H1 mm, and the dimension of the frame 12 is H2 mm, where 0.15 ≤ H2 mm / H1 mm ≤ 0.65. For example, H2 mm / H1 mm can be 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.65.

[0035] When the ratio of the dimension of the frame 12 along the height direction to the dimension of the column 11 along the height direction is less than 0.15, the connection strength between the frame 12 and the side wall 21 is small, and the stiffness and structural stability of the frame 10 are poor.

[0036] When the ratio of the height dimension of the frame 12 to the height dimension of the column 11 is greater than 0.65, the height dimension of the frame 12 is too large, which will increase the weight of the component and the material cost, and is not conducive to the lightweight design of the battery pack 1000.

[0037] According to the battery pack 1000 provided in this embodiment of the present utility model, the ratio of the dimension of the frame 12 along the height direction to the dimension of the column 11 along the height direction is limited to the above-mentioned numerical range. This can ensure the overall rigidity and structural stability of the frame 10, giving it excellent load-bearing and impact resistance capabilities, while also reducing the weight of components and material costs, thereby achieving lightweighting of the battery pack 1000 and increasing the energy density of the battery pack 1000.

[0038] It should be noted that the specific number of the frame 12 and the column 11 can be determined according to actual needs, and this utility model does not impose any special limitation on this.

[0039] It is understood that the materials of the frame 12 and the column 11 can be implemented in various ways, and this utility model does not impose any particular restrictions on them. As an example, the materials of the frame 12 and the column 11 can be high-strength steel.

[0040] 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.

[0041] refer to Figure 6 Each column 11 includes a first column bend 111, a second column bend 112, a third column bend 113, and a fourth column bend 114 connected sequentially from one edge to the other. Any two adjacent first column bends 111, second column bends 112, third column bends 113, and fourth column bends 114 form an angle. The first column bend 111 and the fourth column bend 114 are parallel to and fixedly connected to two adjacent sidewalls 21, respectively. By constructing multiple column bends connected sequentially, the rigidity of the column 11 itself can be increased, thereby enhancing its resistance to deformation and ensuring the structural stability of the column 11. In addition, by fixing the first column bending portion 111 and the fourth column bending portion 114 to the adjacent side wall 21, not only can a stable connection between the column 11 and the box 100 be achieved, but also the external impact load can be evenly distributed to the entire frame 10, thereby ensuring the stability of the overall structure.

[0042] refer to Figure 5 and Figure 6The three frame bodies 12 include longitudinal beams 13. The ends of the longitudinal beams 13 are provided with longitudinal beam overlap portions 135 and longitudinal beam positioning portions 136. The longitudinal beam overlap portions 135 overlap and are fixedly connected to the third column bending portion 113, and the longitudinal beam positioning portions 136 abut against and are fixedly connected to the second column bending portion 112. The longitudinal beam positioning portion 136 provides a precise and reliable installation reference for the longitudinal beams 13, thereby improving installation efficiency. The overlap between the longitudinal beam overlap portions 135 and the third column bending portion 113 provides a force transmission path, allowing the load on the longitudinal beams 13 to be transferred to the columns 11, thereby improving the overall structural stability and load-bearing capacity of the frame 10. According to the battery pack 1000 provided by this utility model, the precise assembly and stable connection between the longitudinal beams 13 and the columns 11 can be achieved through the cooperation of the longitudinal beam positioning portion 136 and the longitudinal beam overlap portion 135.

[0043] refer to Figure 6 and Figure 7 The longitudinal beam 13 includes a first longitudinal beam bend 131, a second longitudinal beam bend 132, and a third longitudinal beam bend 133 connected sequentially along the direction from one side edge to the other side edge. Any two adjacent parts of the first longitudinal beam bend 131, the second longitudinal beam bend 132, and the third longitudinal beam bend 133 form an angle. The second longitudinal beam bend 132 is parallel to the corresponding side wall 21. The first longitudinal beam bend 131 and the third longitudinal beam bend 133 are perpendicular to the side wall 21. The end of the second longitudinal beam bend 132 protrudes beyond the ends of the first longitudinal beam bend 131 and the third longitudinal beam bend 133, forming a longitudinal beam overlap 135 that is parallel to and overlaps with the third column bend 113. The ends of the first longitudinal beam bend 131 and the third longitudinal beam bend 133 form a longitudinal beam positioning part 136. By constructing a structure at the end of the second longitudinal beam bend 132 that protrudes beyond the ends of the first longitudinal beam bend 131 and the third longitudinal beam bend 133, the longitudinal beam overlap 135 and the longitudinal beam positioning part 136 can form a structure that adapts to the second column bend 112 and the third column bend 113, so that the longitudinal beam overlap 135 can overlap the third column bend 113, and the longitudinal beam positioning part 136 can abut against the second column bend 112.

[0044] refer to Figure 7 The longitudinal beam 13 also includes a fourth longitudinal beam bend 134, which is located on the side of the first longitudinal beam bend 131 opposite to the second longitudinal beam bend 132. The fourth longitudinal beam bend 134 is parallel to and fixedly connected to the side wall 21. This implementation not only restrains the possible vibration and displacement of the side wall 21, thereby achieving a stable connection between the longitudinal beam 13 and the box 100, but also evenly distributes external impact loads to the entire frame 10, thus ensuring the stability of the overall structure.

[0045] refer to Figure 6The end face of the fourth longitudinal beam bend 134 is parallel to and fixedly connected to the side face of the first column bend 111. According to the battery pack 1000 provided by this utility model, the first column bend 111 can provide guidance during the installation of the longitudinal beam 13, thereby improving installation efficiency. Furthermore, the fixed connection between the fourth longitudinal beam bend 134 and the first column bend 111 can also enhance the structural stability of the frame 10.

[0046] refer to Figure 7 The first longitudinal beam bend 131, the second longitudinal beam bend 132, and the third longitudinal beam bend 133 constitute a main structure 137. The frame 12 includes two main structures 137, namely a first main structure 1371 and a second main structure 1372. A transition section 138 is provided between the first main structure 1371 and the second main structure 1372. The transition section 138 is parallel to and fixedly connected to the side wall 21. A fourth longitudinal beam bend 134 is provided on the side of the first main structure 1371 away from the transition section 138. The fourth longitudinal beam bend 134 is parallel to and fixedly connected to the side wall 21. The third longitudinal beam bend 133a of the second main structure 1372 is parallel to and fixedly connected to the bottom wall 22. According to the battery pack 1000 provided by this utility model, the first main structure 1371 and the second main structure 1372 are provided with multiple bending structures, which can enhance the ability of the longitudinal beam 13 to resist deformation when bearing longitudinal loads. Furthermore, the second main structure 1372 is closer to the bottom wall 22 than the first main structure 1371, while the fourth longitudinal beam bend 134 is located on the side of the first main structure 1371 away from the transition portion 138, i.e., the second main structure 1372. Therefore, the fourth longitudinal beam bend 134 is far from the bottom wall 22. This implementation allows the fixed position of the fourth longitudinal beam bend 134 and the side wall 21 to be set away from the bottom wall 22, which helps to enhance the constraint effect of the fourth longitudinal beam bend 134 on the upper area of ​​the side wall 21, thereby ensuring the rigidity and overall stability of the connection between the longitudinal beam 13 and the side wall 21.

[0047] Continue to refer to Figure 7 Each longitudinal beam 13 is provided with multiple longitudinal beam weight reduction holes 139. As one possible implementation, the area of ​​the longitudinal beam 13 is S1 mm. 2 The sum of the areas of the multiple longitudinal beam weight reduction holes 139 is S2 mm. 2 0.2≤S2 mm 2 / S1 mm 2 ≤0.8. For example, S2 mm 2 / S1 mm 2 The values ​​can be 0.2, 0.22, 0.25, 0.28, 0.32, 0.36, 0.4, 0.45, 0.5, 0.55, 0.65, or 0.8.

[0048] When the ratio of the area of ​​the bent portion of the longitudinal beam 13 to the sum of the areas of the multiple longitudinal beam weight reduction holes 139 is less than 0.2, the area of ​​the multiple longitudinal beam weight reduction holes 139 is too large, which will weaken the overall stiffness and strength of the longitudinal beam 13, thereby affecting the structural strength of the frame 10.

[0049] When the ratio of the area of ​​the bent part of the longitudinal beam 13 to the sum of the areas of the multiple longitudinal beam weight reduction holes 139 is greater than 0.8, the area of ​​the multiple longitudinal beam weight reduction holes 139 is too small, which will result in the longitudinal beam 13 having a large weight, which is not conducive to the lightweight design of the frame 10.

[0050] According to the battery pack 1000 provided by this utility model, the ratio of the area of ​​the bent part of the longitudinal beam 13 to the sum of the areas of the multiple longitudinal beam weight reduction holes 139 is limited to the above-mentioned numerical range. This can reduce the overall stiffness and strength of the longitudinal beam 13, ensure the structural strength of the frame 10, and reduce the weight and material cost of the longitudinal beam 13, thereby realizing the lightweight design of the frame 10.

[0051] refer to Figure 5 The three frames 12 include two longitudinal beams 13 and one transverse beam 14, with both ends of the transverse beam 14 fixedly connected to the two longitudinal beams 13. According to the battery pack 1000 provided by this utility model, both ends of each frame 12 are fixed to a pair of adjacent uprights 11, and both ends of the transverse beam 14 are fixedly connected to the two longitudinal beams 13. This improves the frame 10's ability to resist impacts in the extending directions of the longitudinal beams 13 and the transverse beam 14.

[0052] refer to Figure 5 and Figure 6 The crossbeam 14 includes, sequentially from one edge to the other, a first crossbeam bend 141, a second crossbeam bend 142, a third crossbeam bend 143, and a fourth crossbeam bend 144. Any two adjacent sections of the first, second, third, and fourth crossbeam bends form an angle. The first crossbeam bend 141 is parallel to and fixedly connected to a corresponding sidewall 21, and the fourth crossbeam bend 144 is parallel to and fixedly connected to the bottom wall 22. By constructing multiple sequentially connected bends, the rigidity of the crossbeam 14 itself can be effectively improved, enhancing its resistance to deformation and thus ensuring structural stability.

[0053] refer to Figure 6 The end of the crossbeam 14 presses against the bent portion 133a of the third longitudinal beam of the second main structure 1372. This arrangement optimizes the efficient transfer and distribution of loads within the frame 10 structure. Specifically, loads from the bottom wall 22 can be transferred to the crossbeam 14, while loads acting on the crossbeam 14 can be distributed to the longitudinal beam 13 through the contact area between the crossbeam 14 and the longitudinal beam 13. This enhances the overall structural integrity and ensures the stiffness and load-bearing capacity of the frame 10.

[0054] refer to Figure 6 The end of the crossbeam 14 is provided with a first flange 1401, which is parallel to and fixedly connected to the bending portion 133a of the third longitudinal beam of the second main structure 1372. The fixed connection between the first flange 1401 and the bending portion 133a of the third longitudinal beam of the second main structure 1372 increases the contact area between the crossbeam 14 and the longitudinal beam 13, thereby enhancing the connection strength between the crossbeam 14 and the longitudinal beam 13.

[0055] Continue to refer to Figure 6 The ends of the crossbeam 14 are further provided with a second flange 1402 and a third flange 1403, both of which are parallel to and fixedly connected to the bent portion 132a of the second longitudinal beam of the second main structure 1372. The fixing of the second flange 1402 and the third flange 1403 to the longitudinal beam 13 enhances the connection strength between the crossbeam 14 and the longitudinal beam 13. This enhances the ability of the crossbeam 14 and the longitudinal beam 13 to resist deformation, thereby improving the stiffness and load-bearing capacity of the frame 10.

[0056] refer to Figure 8 The battery pack 1000 also includes a positioning pin 31 and a pin seat 32 fixed to the positioning pin 31. The pin seat 32 is fixedly connected to the bent portion 141 of the first crossbeam. By connecting the crossbeam 14 to the side wall 21 through the positioning pin 31, the possible vibration and displacement of the side wall 21 can be restrained, thereby ensuring the reliability of the connection between the crossbeam 14 and the side wall 21.

[0057] refer to Figure 6 Each crossbeam 14 is provided with a crossbeam weight reduction hole 145, and the area of ​​the crossbeam 14 is S3 mm. 2 The sum of the areas of the multiple crossbeam weight reduction holes 145 is S4 mm. 2 0.3≤S4 mm 2 / S3 mm 2 ≤0.9. For example, S4 mm 2 / S3 mm 2 It can be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.7, 0.8 or 0.9.

[0058] When the ratio of the area of ​​the crossbeam 14 to the sum of the areas of the multiple crossbeam weight-reducing holes 145 is less than 0.3, the area of ​​the multiple crossbeam weight-reducing holes 145 is too large, which will weaken the overall stiffness and strength of the crossbeam 14, thereby affecting the structural strength of the frame 10.

[0059] When the ratio of the area of ​​the crossbeam 14 to the sum of the areas of the multiple crossbeam weight reduction holes 145 is greater than 0.9, the area of ​​the multiple crossbeam weight reduction holes 145 is too small, which will result in the crossbeam 14 having a large weight, which is not conducive to the lightweight design of the frame 10.

[0060] According to the battery pack 1000 provided by this utility model, the ratio of the area of ​​the crossbeam 14 to the sum of the areas of the multiple crossbeam weight reduction holes 145 is limited to the above-mentioned numerical range. This can reduce the overall stiffness and strength of the crossbeam 14, ensure the structural strength of the frame 10, and reduce the weight and material cost of the crossbeam 14, thereby achieving a lightweight design of the frame 10.

[0061] refer to Figure 5 The battery pack 1000 also includes a partition beam 15 parallel to the crossbeam 14 and connected to the two longitudinal beams 13. The partition beam 15 and the crossbeam 14 divide the housing space into two parts. The battery 200 is housed in the housing space between the partition beam 15 and the crossbeam 14 and its displacement is restricted by the partition beam 15 and the crossbeam 14. The electrical components of the battery management system and the electrical connection system are housed in the housing space between the partition beam 15 and the adjacent side wall 21.

[0062] refer to Figure 5 and Figure 9 The partition beam 15 includes a first partition beam bend 151, a second partition beam bend 152, a third partition beam bend 153, a fourth partition beam bend 154, and a fifth partition beam bend 155 connected sequentially from one edge to the other. The first partition beam bend 151 and the fifth partition beam bend 155 are parallel to and fixedly connected to the bottom wall 22, the second partition beam bend 152 and the fourth partition beam bend 154 are perpendicular to the bottom wall 22, and the third partition beam bend 153 is parallel to the bottom wall 22 and spaced apart. By constructing multiple sequentially connected partition beam bends 15, the rigidity of the partition beam 15 itself can be effectively improved, its resistance to deformation can be enhanced, thereby ensuring structural stability.

[0063] refer to Figure 9 The end of the partition beam 15 presses against the bent portion 133a of the third longitudinal beam of the second main structure 1372. This arrangement enables efficient load transfer and redistribution within the frame 10 structure. Specifically, loads from the bottom wall 22 can be transferred to the partition beam 15, and loads acting on the partition beam 15 can be distributed to the longitudinal beam 13 through the contact area between the partition beam 15 and the longitudinal beam 13. This improves the overall structural integrity and ensures the stiffness and load-bearing capacity of the frame 10.

[0064] Continue to refer to Figure 9The end of the partition beam 15 is provided with a fourth flange 1504 and a fifth flange 1505. Both the fourth flange 1504 and the fifth flange 1505 are parallel to and fixedly connected to the bending portion 133a of the third longitudinal beam of the second main structure 1372. By fixing the fourth flange 1504 and the fifth flange 1505 to the bending portion 133a of the third longitudinal beam of the second main structure 1372, the contact area between the partition beam 15 and the longitudinal beam 13 can be increased, thereby enhancing the connection strength between the partition beam 15 and the longitudinal beam 13.

[0065] Continue to refer to Figure 9 The ends of the partition beam 15 are further provided with a sixth flange 1506, a seventh flange 1507, and an eighth flange 1508. These flanges are all parallel to and fixedly connected to the bent portion 132a of the second longitudinal beam of the second main structure 1372. The seventh flange 1507 extends along the height direction and is fixedly connected to the bent portion 132a of the second longitudinal beam of the first main structure 1371. The fixing of the sixth flange 1506, seventh flange 1507, and eighth flange 1508 to the longitudinal beam 13 enhances the connection strength between the partition beam 15 and the longitudinal beam 13. This enhances the ability of the partition beam 15 and the longitudinal beam 13 to resist deformation, thereby improving the stiffness and load-bearing capacity of the frame 10.

[0066] As one possible implementation, the column 11 has a height dimension of H1 mm, where 190 mm ≤ H1 mm ≤ 220 mm. For example, H1 mm can be 190 mm, 192 mm, 195 mm, 198 mm, 201 mm, 203 mm, 205 mm, 208 mm, 212 mm, 215 mm, 218 mm, or 220 mm.

[0067] When the dimension of the column 11 in the height direction is less than 190 mm, the housing 100 has a smaller capacity, which limits the number of batteries 200 it can accommodate, resulting in a decrease in the energy density of the battery pack 1000.

[0068] When the dimension of the column 11 in the height direction is greater than 220mm, the weight of the component is large and the material cost is high, which is not conducive to the lightweighting of the battery pack 1000. In addition, since some of the space inside the box 100 is not fully utilized, this implementation method will also reduce the space utilization rate.

[0069] According to the battery pack 1000 provided in the embodiment of this utility model, the dimensions of the column 11 in the height direction are limited to the above-mentioned numerical range, which can ensure that the housing 100 provides sufficient space for the battery 200 and ensure the energy density of the battery pack 1000, while also reducing the weight of the components and material costs, which helps to make the battery pack 1000 lighter and improve space utilization.

[0070] As one possible implementation, the frame 12 has a height dimension of H2 mm, where 25 mm ≤ H2 mm ≤ 130 mm. For example, H2 mm can be 25 mm, 30 mm, 35 mm, 45 mm, 55 mm, 65 mm, 75 mm, 85 mm, 95 mm, 105 mm, 120 mm, or 130 mm.

[0071] When the height dimension of the frame 12 is less than 25 mm, the connection strength between the frame 12 and the side wall 21 is relatively low, and the rigidity and structural stability of the frame 10 are poor. When the height dimension of the frame 12 is greater than 130 mm, the weight of the component is large and the material cost is high, which is not conducive to the lightweight design of the battery pack 1000.

[0072] According to the battery pack 1000 provided in the embodiment of this utility model, the dimensions of the frame 12 along the height direction are limited to the above-mentioned numerical range, which can ensure the overall rigidity and structural stability of the frame 10, giving it excellent load-bearing and impact resistance, while also reducing the weight of components and material costs, achieving lightweighting of the battery pack 1000 and improving the energy density of the battery pack 1000.

[0073] 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".

[0074] 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 main structure and the second main structure), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0075] 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 (1000), characterized in that, Includes a housing (100) and a plurality of batteries (200) housed therein, said housing (100) comprising: A frame (10) includes multiple columns (11) and multiple frames (12), each column (11) extending along the height direction, each frame (12) extending between two adjacent columns (11), and both ends of the frame (12) being fixed to the two columns (11); and A box panel (20) covers the outside of the frame (10) and includes a plurality of side walls (21) and a bottom wall (22). Each side wall (21) is fixedly connected to two adjacent uprights (11) and the frame (12) extending between the two uprights (11). The bottom wall (22) is fixedly connected to the plurality of uprights (11) and the plurality of frame (12). In the height direction, the size of the uprights (11) is H1 mm and the size of the frame (12) is H2 mm, 0.15 ≤ H2 mm / H1 mm ≤ 0.

65.

2. The battery pack (1000) according to claim 1, characterized in that, The frame (10) includes four columns (11) and three frames (12). The four columns (11) are respectively arranged at the four parallel edges of a cuboid. Each frame (12) is fixed at both ends to a pair of adjacent columns (11). The three frames (12) are respectively fixed to different pairs of adjacent columns (11). The box panel (20) includes four side walls (21) and a bottom wall (22). Each side wall (21) is fixedly connected to a pair of adjacent columns (11). The four side walls (21) are respectively fixed to different pairs of adjacent columns (11). Three of the four side walls (21) are respectively fixedly connected to the three frames (12). The bottom wall (22) is fixedly connected to the four columns (11) and the three frames (12).

3. The battery pack (1000) according to claim 1, characterized in that, Each column (11) includes a first column bend (111), a second column bend (112), a third column bend (113), and a fourth column bend (114) connected sequentially along the direction from one side edge to the other side edge. Any two adjacent columns of the first column bend (111), the second column bend (112), the third column bend (113), and the fourth column bend (114) form an angle. The first column bend (111) and the fourth column bend (114) are parallel to and fixedly connected to two adjacent side walls (21), respectively.

4. The battery pack (1000) according to claim 3, characterized in that, The three frames (12) include longitudinal beams (13), the ends of which are provided with longitudinal beam overlap (135) and longitudinal beam positioning (136). The longitudinal beam overlap (135) overlaps and is fixedly connected to the third column bending part (113), and the longitudinal beam positioning part (136) abuts against and is fixedly connected to the second column bending part (112).

5. The battery pack (1000) according to claim 4, characterized in that, The longitudinal beam (13) includes a first longitudinal beam bend (131), a second longitudinal beam bend (132), and a third longitudinal beam bend (133) connected sequentially along the direction from one side edge to the other side edge. Any two adjacent parts of the first longitudinal beam bend (131), the second longitudinal beam bend (132), and the third longitudinal beam bend (133) form an angle. The second longitudinal beam bend (132) is parallel to the corresponding side wall (21), and the first longitudinal beam bend (131)... The bending portion (133) of the third longitudinal beam is perpendicular to the side wall (21). The end of the bending portion (132) of the second longitudinal beam protrudes beyond the ends of the bending portions (131) and the bending portions (133) of the first longitudinal beam and the third longitudinal beam, forming a longitudinal beam overlap portion (135) that is parallel to and overlaps with the bending portion (113) of the third column. The ends of the bending portions (131) and the bending portions (133) of the first longitudinal beam and the third longitudinal beam form the longitudinal beam positioning portion (136).

6. The battery pack (1000) according to claim 5, characterized in that, The longitudinal beam (13) also includes a fourth longitudinal beam bend (134), which is located on the side of the first longitudinal beam bend (131) away from the second longitudinal beam bend (132). The fourth longitudinal beam bend (134) is parallel to and fixedly connected to the side wall (21).

7. The battery pack (1000) according to claim 6, characterized in that, The end face of the fourth longitudinal beam bend (134) is parallel to and fixedly connected to the side face of the first column bend (111).

8. The battery pack (1000) according to claim 5, characterized in that, The first longitudinal beam bend (131), the second longitudinal beam bend (132), and the third longitudinal beam bend (133) constitute a main structure (137). The frame (12) includes two main structures (137), which include a first main structure (1371) and a second main structure (1372). A transition section (138) is provided between the first main structure (1371) and the second main structure (1372). The transition section (138) is parallel to and fixedly connected to the side wall (21). A fourth longitudinal beam bend (134) is provided on the side of the first main structure (1371) away from the transition section (138). The fourth longitudinal beam bend (134) is parallel to and fixedly connected to the side wall (21). The third longitudinal beam bend (133a) of the second main structure (1372) is parallel to and fixedly connected to the bottom wall (22).

9. The battery pack (1000) according to claim 8, characterized in that, Each longitudinal beam (13) is provided with multiple longitudinal beam weight reduction holes (139), and the area of ​​the longitudinal beam (13) is S1 mm. 2 The sum of the areas of the plurality of longitudinal beam weight-reduction holes (139) is S2 mm. 2 0.2≤S2 mm 2 / S1 mm 2 ≤0.

8.

10. The battery pack (1000) according to claim 8, characterized in that, The three frames (12) include two longitudinal beams (13) and one transverse beam (14), with both ends of the transverse beam (14) fixedly connected to the two longitudinal beams (13).

11. The battery pack (1000) according to claim 10, characterized in that, The crossbeam (14) includes, in sequence from one side edge to the other side edge, a first crossbeam bend (141), a second crossbeam bend (142), a third crossbeam bend (143), and a fourth crossbeam bend (144). Any two adjacent crossbeam bends (141, 142, 143, and 144) form an angle. The first crossbeam bend (141) is parallel to and fixedly connected to a corresponding side wall (21), and the fourth crossbeam bend (144) is parallel to and fixedly connected to the bottom wall (22).

12. The battery pack (1000) according to claim 11, characterized in that, The end of the crossbeam (14) presses against the bent portion (133a) of the third longitudinal beam of the second main structure (1372).

13. The battery pack (1000) according to claim 12, characterized in that, The end of the crossbeam (14) is provided with a first flange (1401), which is parallel to and fixedly connected to the third longitudinal beam bend (133a) of the second main structure (1372).

14. The battery pack (1000) according to claim 13, characterized in that, The end of the crossbeam (14) is also provided with a second flange (1402) and a third flange (1403), both of which are parallel to and fixedly connected to the second longitudinal beam bend (132a) of the second main structure (1372).

15. The battery pack (1000) according to claim 11, characterized in that, It also includes a positioning pin (31) and a pin seat (32) fixed to the positioning pin (31), the pin seat (32) being fixedly connected to the bent portion (141) of the first crossbeam.

16. The battery pack (1000) according to claim 10, characterized in that, Each crossbeam (14) is provided with a crossbeam weight reduction hole (145), and the area of ​​the crossbeam (14) is S3 mm. 2 The sum of the areas of the plurality of crossbeam weight-reduction holes (145) is S4 mm. 2 0.3≤S4 mm 2 / S3 mm 2 ≤0.

9.

17. The battery pack (1000) according to claim 10, characterized in that, It also includes a partition beam (15) that is parallel to the crossbeam (14) and connected to the two longitudinal beams (13). The partition beam (15) includes a first partition beam bend (151), a second partition beam bend (152), a third partition beam bend (153), a fourth partition beam bend (154), and a fifth partition beam bend (155) connected in sequence along the direction from one side edge to the other side edge. The first partition beam bend (151) and the fifth partition beam bend (155) are both parallel to the bottom wall (22) and fixedly connected. The second partition beam bend (152) and the fourth partition beam bend (154) are both perpendicular to the bottom wall (22). The third partition beam bend (153) is parallel to the bottom wall (22) and spaced apart.

18. The battery pack (1000) according to claim 17, characterized in that, The end of the partition beam (15) presses against the bent portion (133a) of the third longitudinal beam of the second main structure (1372).

19. The battery pack (1000) according to claim 18, characterized in that, The end of the partition beam (15) is provided with a fourth flange (1504) and a fifth flange (1505). The fourth flange (1504) and the fifth flange (1505) are both parallel to and fixedly connected to the third longitudinal beam bend (133a) of the second main structure (1372).

20. The battery pack (1000) according to claim 19, characterized in that, The end of the partition beam (15) is also provided with a sixth flange (1506), a seventh flange (1507) and an eighth flange (1508). The sixth flange (1506), the seventh flange (1507) and the eighth flange (1508) are all parallel to and fixedly connected to the second longitudinal beam bend (132a) of the second main structure (1372). The seventh flange (1507) extends along the height direction to be fixedly connected to the second longitudinal beam bend (132) of the first main structure (1371).

21. The battery pack (1000) according to claim 1, characterized in that, In the height direction, the dimensions of the column (11) are H1 mm, 190 mm ≤ H1 mm ≤ 220 mm, and / or; the dimensions of the frame (12) are H2 mm, 25 mm ≤ H2 mm ≤ 130 mm.

22. An electrical appliance (2000), characterized in that, Includes the battery pack (1000) according to any one of claims 1 to 21.

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