Battery box, battery pack and electric device

Abstract

The battery box body, the battery pack and the electric equipment are provided, the battery box body comprises a frame, a bottom plate and a partition beam, the frame is surrounded at the edge of the bottom plate and surrounds the containing cavity with the bottom plate, the partition beam is arranged in the containing cavity, and the containing cavity is divided into at least two compartments; the frame comprises adjacent first side beams and second side beams, the partition beam is connected with the first side beam; a reinforcing block is arranged at the connection of the first side beam and the second side beam, the reinforcing block is welded with the first side beam and the second side beam respectively, and the first weld is arranged along the circumference of the reinforcing block; and / or a reinforcing block is arranged at the connection of the partition beam and the first side beam, the reinforcing block is welded with the partition beam and the first side beam, and the first weld is arranged along the circumference of the reinforcing block. On the basis of improving the connection strength of the connection of the battery box body, the deformation of the connection of the first side beam and the second side beam and / or the connection of the first side beam and the partition beam caused by excessive heat during welding is also avoided.

Description

Technical Field

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

[0002] Battery packs, used for storing and supplying electrical energy, are widely used in various devices. To ensure safety during use, the multiple batteries within the pack are typically housed in a specific battery enclosure. This enclosure effectively protects the individual batteries from external impacts.

[0003] However, the connection points of the battery pack often have insufficient strength, which can easily lead to deformation or even damage at the connection points, making it impossible to ensure the safety performance of the battery pack during use. Utility Model Content

[0004] In view of this, the present disclosure provides a battery housing, a battery pack, and an electrical device, which aims to at least improve the problem of insufficient strength at the connection points of the battery housing.

[0005] In a first aspect, this disclosure provides a battery housing, which includes a frame, a base plate, and a partition beam. The frame surrounds the edge of the base plate and forms a receiving cavity with the base plate. The partition beam is disposed in the receiving cavity and divides the receiving cavity into at least two compartments. The frame includes an adjacent first side beam and a second side beam, and the partition beam is connected to the first side beam. A reinforcing block is provided at the connection between the first side beam and the second side beam, and the reinforcing block is welded to the first side beam and the second side beam respectively, with a first weld seam spaced apart along the periphery of the reinforcing block. And / or, a reinforcing block is provided at the connection between the partition beam and the first side beam, and the reinforcing block is welded to the partition beam and the first side beam, with a first weld seam spaced apart along the periphery of the reinforcing block.

[0006] Secondly, this disclosure also provides a battery pack, which includes a plurality of battery cells and a battery housing as described above, wherein the plurality of battery cells are arranged in the battery housing.

[0007] Thirdly, this disclosure also provides an electrical appliance that includes the battery pack described above.

[0008] According to the battery box, battery pack, and electrical equipment provided in this disclosure, by welding reinforcing blocks at the connection between the first side beam and the second side beam and / or the connection between the first side beam and the partition beam, the connection strength at the corresponding connection can be improved, avoiding the problem of deformation or damage to the battery box at the connection. At the same time, the first welds between the reinforcing blocks and the first side beam, the second side beam, and the partition beam are arranged at intervals on the periphery of the reinforcing blocks, avoiding deformation at the connection between the first side beam and the second side beam and / or the connection between the first side beam and the partition beam due to excessive heat during welding caused by excessively long first welds. Attached Figure Description

[0009] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0010] It should 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 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 schematic diagram of an exemplary battery box.

[0013] Figure 2 for Figure 1 Enlarged view of point B in the middle.

[0014] Figure 3 for Figure 1 The diagram shows the structure of the battery box from one perspective.

[0015] Figure 4 for Figure 3 The battery box shown is a cross-sectional view along the AA direction.

[0016] Figure 5 This is a schematic diagram of an exemplary reinforcing block.

[0017] Figure 6 for Figure 5 The diagram shows the structure of the reinforcing block from one perspective.

[0018] Figure 7 for Figure 3 Enlarged view of point C in the middle.

[0019] Figure 8 This is a schematic diagram of an exemplary battery pack.

[0020] Explanation of reference numerals in the attached drawings: 100, battery housing; 101, electrical compartment; 102, battery compartment; 10, first side beam; 11, first part; 12, second part; 20, second side beam; 30, partition beam; 31, second weld; 301, first partition beam; 302, second partition beam; 40, reinforcing block; 401, first reinforcing block; 402, second reinforcing block; 41, first weld; 42, first side wall; 43, second side wall; 44, cavity; 45, support rib; 46, first surface; 47, second surface; 50, spacer; 60, battery cell. Detailed Implementation

[0021] 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.

[0022] In related technologies, multiple battery cells are placed within the containment space formed by a battery casing to protect them from external impacts. However, due to insufficient connection strength between the side beams and / or between the side beams and the partition beams located inside the battery casing, the battery casing often deforms or is damaged at these connection points, thus failing to provide effective protection for the multiple battery cells.

[0023] In existing technologies, reinforcing members with specific structures are typically used to improve the strength of the connection points between the battery casing and the battery casing. To ensure the connection strength between the reinforcing member and the battery casing, welding is usually employed. However, to increase the welding strength between the reinforcing member and the battery casing, a "full weld" method is often used. This generates a large amount of heat during the welding process, causing deformation at the welded points of the battery casing due to excessive heat, thus failing to provide effective protection for the multiple battery cells.

[0024] The inventors discovered that the cause of the above problems was that the reinforcement was welded to the battery box using a "full welding" method, which caused the battery box to deform due to reduced strength at the welding point caused by excessively high temperature.

[0025] To solve the above problems, the inventors made many attempts and finally creatively proposed the following technical solution: Welding reinforcing blocks at the connection between the first side beam and the second side beam and / or the connection between the first side beam and the partition beam to improve the connection strength at the corresponding connection and avoid deformation or damage to the battery box at the connection; At the same time, the reinforcing blocks are welded to the battery box by "spot welding", that is, the first weld between the reinforcing blocks and the first side beam, the second side beam and the partition beam is arranged at intervals on the periphery of the reinforcing blocks, avoiding deformation at the connection between the first side beam and the second side beam and / or the connection between the first side beam and the partition beam due to excessive heat during welding caused by the first weld being too long.

[0026] The battery enclosure described in this disclosure refers to a closed or semi-closed structure made of metals such as steel plates or aluminum alloys, plastics, or lightweight materials such as glass fiber reinforced composites or carbon fiber reinforced composites. It serves as the physical carrier of the battery pack, and its design and manufacturing must meet the safety, reliability, and functionality requirements of the battery pack under different usage scenarios. The enclosure provides installation space for the battery pack, BMS, cooling system, electrical connection components, etc., and through a reasonable structural design, fixes these components within the enclosure, ensuring they maintain a relatively stable position during battery pack operation and preventing damage or loosening of connections due to vibration, impact, or other factors.

[0027] A battery casing typically consists of an upper casing and a lower casing. The lower casing usually has four side panels and a bottom plate. The four side panels can be integrally formed with the bottom plate or formed separately and fixedly connected. The casing shape can be cylindrical, cuboid, cube, etc.

[0028] The battery pack described in this disclosure includes a battery pack composed of multiple battery cells connected in series and / or in parallel to form 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, etc., and the above components are placed in the battery box and sealed with a cover plate to form a complete functional unit that can directly output electrical energy.

[0029] The aforementioned battery cell refers to a battery that can store chemical energy and controllably convert it into electrical energy. In recyclable batteries, the active materials can be reactivated by charging after discharge, allowing for continued use. A battery cell typically includes a casing and a battery cell housed within the casing.

[0030] <Example Battery Housing> This disclosure provides a battery box 100, which includes a frame, a bottom plate, and a partition beam 30. The frame surrounds the edge of the bottom plate and forms a receiving cavity with the bottom plate. The partition beam is disposed in the receiving cavity and divides the receiving cavity into at least two compartments. The frame includes an adjacent first side beam 10 and a second side beam 20, and the partition beam 30 is connected to the first side beam 10. A reinforcing block 40 is provided at the connection between the first side beam 10 and the second side beam 20. The reinforcing block 40 is welded to the first side beam 10 and the second side beam 20 respectively, and a first weld 41 is arranged at intervals along the periphery of the reinforcing block 40. And / or, a reinforcing block 40 is provided at the connection between the partition beam 30 and the first side beam 10. The reinforcing block 40 is welded to the partition beam and the first side beam 10, and the first weld 41 is arranged at intervals along the periphery of the reinforcing block 40.

[0031] For ease of understanding, the battery housing disclosed herein will be described in detail below with reference to the accompanying drawings. In the drawings, the X-axis can represent, for example, the length direction of the battery housing, i.e., the length direction of the first side beam; the Y-axis can represent, for example, the width direction of the battery housing, i.e., the thickness direction of the first side beam; and the Z-axis can represent, for example, the height direction of the battery housing, i.e., the height direction of the first side beam.

[0032] See Figures 1 to 3 This embodiment shows a battery box 100 with a cuboid shape. Unless otherwise specified, the following embodiments will be described using a battery box 100 with a cuboid shape as an example.

[0033] As shown in the figure, the frame of the battery box 100 includes two opposing first side beams 10 and two opposing second side beams 20, which are connected end-to-end to form the frame of the battery box 100. Simultaneously, the frame and the inner side of the base plate also form the receiving space of the battery box 100. At least one partition beam 30 is provided within this receiving space. It is understood that the partition beam 30 can divide the receiving space of the battery box 100 into two or more independent spaces to separate multiple battery cells and electrical components.

[0034] See also Figure 1 and Figure 3A reinforcing block 40 is provided at the connection point of the first side beam 10 and the second side beam 20. The first side beam 10 and the second side beam 20 can be connected by means such as welding or specific fasteners; this application does not specifically limit the connection method between the first side beam 10 and the second side beam 20. It is understood that a part of the reinforcing block 40 is welded to the first side beam 10, and another part of the reinforcing block 40 is welded to the second side beam 20. Thus, in addition to their own connection, the first side beam 10 and the second side beam 20 can be further connected by the reinforcing block 40. In this way, the connection between the first side beam 10 and the second side beam 20 has "double protection," greatly improving the strength of the connection point and thus solving the problem that the battery box 100 is prone to deformation or even damage at the connection between the first side beam 10 and the second side beam 20.

[0035] See also Figure 1 and Figure 3 The partition beam 30 can be perpendicular to the first side beam 10, that is, the partition beam 30 and the second side beam 20 can be parallel to each other. The partition beam 30 is connected to the two oppositely arranged first side beams 10 through its two ends. The first side beams 10 and the partition beam 30 are connected by means of welding or fasteners of a specific structure, and this application does not make any special limitation on the connection method between the first side beams 10 and the partition beam 30. Similarly, a reinforcing block 40 can also be provided at the connection between the first side beams 10 and the partition beam 30. One part of the reinforcing block 40 is welded to the first side beam 10, and the other part of the reinforcing block 40 is connected to the partition beam 30. Similarly, in addition to their own connection, the first side beams 10 and the partition beam 30 can also be connected by the reinforcing block 40. In this way, the connection between the first side beams 10 and the partition beam 30 also has "double protection", which greatly improves the strength of the connection between the two, and thus solves the problem that the battery box 100 is prone to deformation or even damage at the connection between the first side beams 10 and the partition beam 30.

[0036] It should be noted that the strength requirements of the battery box 100 can be determined based on factors such as its shape, size, and operating environment, and the placement and number of reinforcing blocks 40 can be adjusted accordingly. For example, if the battery box 100 is large and the risk of deformation is high, the number of reinforcing blocks 40 can be appropriately increased; or if the operating environment of the battery box 100 is harsh and the risk of external force is high, the number of reinforcing blocks 40 can also be appropriately increased. For example, reinforcing blocks 40 can be placed at all connections between the first side beam 10 and the second side beam 20; or reinforcing blocks 40 can be placed only at some connections between the first side beam 10 and the second side beam 20; or reinforcing blocks 40 can be placed at all connections between the first side beam 10 and the second side beam 20, and at all connections between the first side beam 10 and the partition beam 30; or reinforcing blocks 40 can be placed at some connections between the first side beam 10 and the second side beam 20, and at some connections between the first side beam 10 and the partition beam 30. This application does not impose any special limitations on the number or specific placement of the reinforcing blocks 40.

[0037] For example, such as Figure 3 and Figure 4 As shown, the length of the first side beam 10 is L3mm, and the distance between two first side beams 10 is L4mm, where 1≤L3mm / L4mm≤4. The distance between two first side beams 10 can be understood as the straight-line distance between them. L3mm / L4mm can also be understood as the aspect ratio of the battery box 100. A battery box 100 that meets the above aspect ratio will have a larger length, meaning the length of the first side beam 10 will be larger. When multiple battery cells are placed, or after the first side beam 10 is welded to the partition beam 30, the area near the middle of the first side beam 10 is more prone to deformation. By arranging the first weld 41 of the reinforcing block 40 at the connection between the first side beam 10 and the partition beam 30 at intervals, the problem of easy deformation in the middle of the first side beam 10 can be solved more effectively.

[0038] For example, the ratio of L3mm / L4mm can be 1, 1.2, 1.5, 1.8, 2, 2.5, 2.8, 3, 3.5, 3.6, 3.8, or 4, etc. In practice, the ratio of L3mm / L4mm can also be set to other values ​​that meet the above range, and is not limited to the ratios listed above.

[0039] Optionally, the value of L3mm ranges from 1000mm to 3000mm, and the value of L4mm ranges from 250mm to 1500mm. For example, L3mm values ​​can be 1000mm, 1500mm, 1800mm, 2000mm, 2200mm, 2500mm, 2800mm, or 3000mm, etc. L4mm values ​​can be 250mm, 300mm, 500mm, 600mm, 800mm, 1000mm, 1200mm, 1300mm, 1400mm, or 1500mm, etc. In practice, the values ​​of L3mm and L4mm can be determined based on factors such as the battery pack capacity, and are not limited to the values ​​listed above.

[0040] Furthermore, such as Figure 2 As shown, when the reinforcing block 40 is welded to the first side beam 10, the second side beam 20, and the partition beam 30, the corresponding first weld seams 41 are spaced apart around the periphery of the reinforcing block 40. For example, the reinforcing block 40 can be welded to the first side beam 10, the second side beam 20, and the partition beam 30 by means of spot welding, so that the first weld seams 41 generated during the welding process are discontinuous. That is, only a portion of the periphery of the reinforcing block 40 is welded to the first side beam 10, the second side beam 20, or the partition beam 30. In this way, the heat generated during the welding process can be greatly reduced, thereby avoiding the problem of local deformation of the battery box 100 due to excessive temperature at the welding positions of the first side beam 10, the second side beam 20, and the partition beam 30, further improving the overall strength of the battery box 100 and ensuring the safety performance of the battery pack during use.

[0041] It should be noted that during the welding process of the reinforcing block 40, the length or number of the first weld 41 can be adaptively adjusted according to the shape and size of the reinforcing block 40. For example, when the periphery of the reinforcing block 40 is approximately rectangular, the length or number of the first weld 41 can be appropriately increased when welding the long side of the reinforcing block 40; when welding the short side of the reinforcing block 40, the length or number of the first weld 41 can be appropriately reduced. This application does not impose any special limitations on the length and number of the first weld 41.

[0042] In one alternative embodiment, the total length of the entire periphery of the reinforcing block 40 for welding with the first side beam 10, the second side beam 20 and the partition beam 30 is L1mm, and the total length of the first weld 41 located on the periphery of the reinforcing block 40 is L2mm, 0.5≤L2mm / L1mm≤0.8.

[0043] Specifically, with Figure 2 and Figure 5 Let's take an example to illustrate: Figure 3The reinforcing block 40 shown is welded to the first side beam 10 and the partition beam 30, respectively. For example, the first sidewall 42 of the reinforcing block 40 and the surface of the reinforcing block 40 facing the base plate (e.g., the bottom surface of the reinforcing block 40) are used for welding to the first side beam 10, and the second sidewall 43 of the reinforcing block 40 is used for welding to the partition beam 30. Thus, the sum of the perimeter of the first sidewall 42, the perimeter of the bottom surface of the reinforcing block 40, and the perimeter of the second sidewall 43 is the total length L1mm of the entire perimeter of the reinforcing block 40 used for welding to the first side beam 10 and the partition beam 30. See also... Figure 2 The sum of the lengths of the first weld 41 located on the periphery of the first side wall 42, the first weld 41 located on the periphery of the second side wall 43, and the first weld 41 located on the periphery of the bottom surface of the reinforcing block 40 is the total length L2mm of the first weld 41 around the reinforcing block 40.

[0044] Similarly, when the reinforcing block 40 is welded to the first side beam 10 and the side beam 20 respectively, the first side wall 42 and the bottom surface of the reinforcing block 40 are used for welding to the first side beam 10, and the second side wall 43 of the reinforcing block 40 is used for welding to the second side beam 20. Thus, the sum of the perimeter of the first side wall 42, the perimeter of the bottom surface of the reinforcing block 40, and the perimeter of the second side wall 43 is the total length L1mm of the entire perimeter of the reinforcing block 40 used for welding to the first side beam 10 and the second side beam 20. See also... Figure 2 The sum of the lengths of the first weld 41 located on the periphery of the first side wall 42, the first weld 41 located on the periphery of the second side wall 43, and the first weld 41 located on the periphery of the bottom surface of the reinforcing block 40 is the total length L2mm of the first weld 41 around the reinforcing block 40.

[0045] It should be noted that, in use, the perimeter of the reinforcing block 40 used for welding with the first side beam 10, the second side beam 20, and the partition beam 30 can be adaptively adjusted based on factors such as the specific structure and relative position of the first side beam 10, the second side beam 20, and the partition beam 30. In this case, the calculation method for L1mm also needs to be adjusted accordingly. For example, it is possible to weld the reinforcing block 40 to the first side beam 10 only through the perimeter of the first side wall 42; and to weld the perimeter of the second side wall 43 to the second side beam 20, without needing to weld the bottom surface of the reinforcing block 40 to the first side beam 10. In this case, the total length of the perimeter of the reinforcing block 40 used for welding with the first side beam 10 and the second side beam 20 is the sum of the perimeters of the first side wall 42 and the second side wall 43. Other cases can be referred to the above description and will not be repeated here.

[0046] The reinforcing block 40 and the first weld 41, meeting the above-mentioned requirements, ensure that the length of the first weld 41 is sufficiently long to guarantee the stability of the welding between the reinforcing block 40 and the first side beam 10, the second side beam 20, and the partition beam 30. Furthermore, they prevent the total length of the first weld 41 from becoming excessive, thus avoiding deformation of the first side beam 10, the second side beam 20, and the partition beam 30 at the welding position due to excessive temperature. The L2mm / L1mm ratio can be, for example, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, or 0.8. In use, the L2mm / L1mm ratio can be adaptively adjusted according to factors such as the shape and size of the reinforcing block 40, and is not limited to the ratios listed above.

[0047] Optionally, the value of L1mm ranges from 150mm to 400mm, and the value of L2mm ranges from 75mm to 320mm. For example, the value of L1mm can be 150mm, 160mm, 180mm, 200mm, 260mm, 280mm, 300mm, 350mm, 360mm, 380mm, or 400mm, etc. The value of L2mm can be 75mm, 90mm, 100mm, 150mm, 180mm, 200mm, 220mm, 260mm, 280mm, 300mm, or 320mm, etc. In use, the values ​​of L1mm and L2mm can be determined by comprehensively considering factors such as the relative dimensions of the first side beam 10, the second side beam 20, the partition beam 30, and the reinforcing block 40, and are not limited to the values ​​listed above.

[0048] See Figure 3 The partition beam 30 may include, for example, a first partition beam 301 and a second partition beam 302. The first partition beam 301 divides the interior of the frame into an electrical compartment 101 and a battery compartment 102, and the second partition beam 302 divides the battery compartment 102 into at least two housing units. That is, two partition beams 30 are provided, dividing the interior of the battery housing 100 into three independent spaces. One space is the electrical compartment 101, used to house electrical components that control multiple battery cells and connect external circuits to the multiple battery cells. The other two spaces may be, for example, battery compartments 102, used to house multiple battery cells. In use, three, four, or other numbers of partition beams 30 may be provided, not just two.

[0049] Preferably, a first reinforcing block 401 is provided at the connection between the first partition beam 301 and the first side beam 10, and a second reinforcing block 402 is provided at the connection between the second partition beam 302 and the first side beam 10. The total length of the first weld 41 located around the first reinforcing block 401 is greater than the total length of the first weld 41 located around the second reinforcing block 402.

[0050] As described above, the first partition beam 301 divides the interior of the battery housing 100 into an electrical compartment 101 and a battery compartment 102. That is, the accommodating spaces on both sides of the first partition beam 301 are used to place electrical components on one side and battery cells on the other side. The second partition beam 302 divides the battery compartment 102 into two accommodating units. That is, the accommodating spaces on both sides of the second partition beam 302 are used to place multiple battery cells.

[0051] It is easy to understand that the battery cells expand during cycling, thus compressing the first partition beam 301 and the second partition beam 302. Therefore, only the side of the first partition beam 301 facing the battery compartment 102 is subjected to the compressive force of the expansion, while the side facing the electrical compartment 101 is not. The connection between the first partition beam 301 and the first side beam 10 is at increased risk of deformation due to this unilateral expansion force. Both sides of the second partition beam 302 are subjected to the compressive force of the expansion, and the directions of the expansion forces on both sides are opposite, meaning that the expansion forces on both sides of the second partition beam 302 are partially or completely canceled out. The connection between the second partition beam 302 and the first side beam 10 is less prone to deformation due to the bilateral expansion force. Making the total length of the first weld 41 around the periphery of the first reinforcing block 401 greater than the total length of the first weld 41 around the periphery of the second reinforcing block 402 can improve the welding strength between the first reinforcing block 41 and the first side beam 10 and the first partition beam 301, thereby mitigating the deformation problem caused by the unilateral expansion force.

[0052] See Figure 4 As an optional implementation, in the height direction of the first side beam 10, the top surface of the reinforcing block 40 is lower than the top surface of the frame. For ease of understanding, for example, the positive Z-axis can be defined as the direction from the bottom surface to the top surface. That is, in the height direction of the first side beam 10, the plane above the reinforcing block 40 is its top surface, and the plane above the frame is its top surface. The top surface of the reinforcing block 40 being lower than the top surface of the frame can be understood, for example, in the height direction of the first side beam 10, the position of the top surface of the reinforcing block 40 is below the position of the top surface of the frame. In this way, the reinforcing block 40 does not additionally increase the height of the battery box 100, and therefore does not additionally increase the volume of the battery pack.

[0053] See Figure 2 and Figure 4 The first side beam 10 includes a first part 11 and a second part 12. The first part 11 can be understood, for example, as extending along the height direction of the first side beam 10, and the second part 12 can be understood, for example, as extending along the thickness direction of the first side beam 10. The second part 12 is located on the bottom surface of the first part 11.

[0054] Specifically, in the thickness direction of the first side beam 10, one side of the second part 12 is connected to the bottom surface of the first part 11, and the other side opposite to one side of the second part extends a certain distance along the thickness direction of the first side beam 10 toward the interior of the frame. That is to say, the other side of the second part 12 is located within the receiving space of the battery box 100 to facilitate welding between the second part and the reinforcing block 40.

[0055] Preferably, the first part 11 and the second part 12 are integrally formed. This improves the overall integrity of the first part 11 and the second part 12, thereby increasing the overall strength of the first side beam 10 and further reducing the probability of deformation of the first side beam 10. For example, the first part 11 and the second part 12 can be manufactured by casting or other processing methods.

[0056] As shown in the figure, the reinforcing block 40 extends along the height direction of the first side beam 40. That is, the side surface of the reinforcing block 40 contacts the first part 11 of the first side beam 10 so that the two can be welded together; at the same time, the bottom surface of the reinforcing block 40 contacts the top surface of the second part 12 so that the two can be welded together. In this way, the first part 11 is welded to the side surface of the reinforcing block 40, and the second part 12 is welded to the bottom surface of the reinforcing block 40, thereby realizing the welding between the first side beam 10 and the reinforcing block 40.

[0057] See also Figure 4 In the height direction of the first side beam 10, the height of the reinforcing block 40 is h1mm, and the height of the first part 11 is h2mm, where 0.6≤h1mm / h2mm≤0.97. The first side beam 10 and the reinforcing block 40 satisfying the above ranges ensure, on the one hand, that the height of the reinforcing block 40 is sufficiently large to ensure the welding strength between the first part 11 and the side of the reinforcing block 40; on the other hand, it prevents the height of the reinforcing block 40 from being excessively high, thus avoiding an additional increase in the height of the battery box 100 and consequently an increase in the volume of the battery box 100.

[0058] For example, the ratio of h1mm / h2mm can be 0.6, 0.62, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, or 0.97, etc.

[0059] Optionally, the value of h1mm ranges from 60mm to 120mm, and the value of h2mm ranges from 80mm to 160mm. For example, the value of h1mm can be 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, or 120mm, etc. The value of h2mm can be 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, or 160mm, etc. In practice, h1mm and h2mm can also be set to other values ​​that satisfy the above ranges, and are not limited to the values ​​listed above.

[0060] Furthermore, in the thickness direction of the first side beam 10, the second part 12 extends into the frame by a dimension of L5mm, and the width of the reinforcing block 40 is L6mm, where 1.2≤L5mm / L6mm≤1.8. The width of the reinforcing block 40 can be understood, for example, as the maximum distance from one side to the opposite side of the reinforcing block 40 in the thickness direction of the first side beam 10. The second part 12 and the reinforcing block 40 satisfying the above ranges ensure, on the one hand, that the extension dimension of the second part 12 is sufficiently large to ensure the welding strength between the second part 12 and the reinforcing block 40; on the other hand, it prevents the extension dimension of the second part 12 from being excessively large, thus avoiding excessive occupation of the storage space within the battery box 100, and allowing more space for the battery cells.

[0061] For example, the ratio of L5mm / L6mm can be 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, or 1.8, etc. In use, the ratio of L5mm / L6mm can be adjusted according to the shape and size of the reinforcing block 40, and is not limited to the ratios listed above.

[0062] Optionally, L5mm can range from 12mm to 40mm, and L6mm can range from 10mm to 30mm. For example, L5mm can be 12mm, 15mm, 18mm, 20mm, 25mm, 30mm, 35mm, 38mm, or 40mm, etc., and L6mm can be 10mm, 12mm, 15mm, 18mm, 20mm, 22mm, 25mm, 26mm, or 30mm, etc. In practice, L5mm and L6mm can also be set to other values ​​that satisfy the above ranges, and are not limited to the values ​​listed above.

[0063] See Figure 2 , Figure 5 and Figure 6The reinforcing block 40 can be configured as an approximately isosceles trapezoidal block. The reinforcing block 40 has a first surface 46 and a second surface 47 that are parallel to each other. The two sidewalls located between the first surface 46 and the second surface 47 can be understood as, for example, the first sidewall 42 and the second sidewall 43 of the reinforcing block 40.

[0064] To illustrate this by example, consider the reinforcing block 40 located at the connection between the first side beam 10 and the second side beam 20. The first side wall 42 is welded to the first side beam 10, and the second side wall 43 is welded to the second side beam 20. Specifically, the first side wall 42 is in surface contact with the first side beam 10, with its top edge welded to the upper part of the first portion 11 of the first side beam 10; the side of the first side wall 42 adjacent to the first surface 46 is welded to the middle section of the first portion 11 of the first side beam 10. Similarly, the second side wall 43 is in surface contact with the second side beam 20, with its top edge welded to the upper part of the second side beam 20; the side of the second side wall 43 adjacent to the first surface 46 is welded to the middle section of the second side beam 20.

[0065] Taking the reinforcing block 40 located at the connection between the first side beam 10 and the partition beam 30 as an example: the first side wall 42 is welded to the first side beam 10, and the second side wall 43 is welded to the partition beam 30. Specifically, the first side wall 42 is in contact with the surface of the first side beam 10, wherein the top edge of the first side wall 42 is welded to the upper part of the first portion 11 of the first side beam 10; the side of the first side wall 42 adjacent to the first surface 46 is welded to the middle section of the first portion 11 of the first side beam 10. Similarly, the second side wall 43 is in contact with the surface of the partition beam 30, wherein the top edge of the second side wall 43 is welded to the upper part of the partition beam 30; the side of the second side wall 43 adjacent to the first surface 46 is welded to the middle section of the partition beam 30.

[0066] It should be noted that the reinforcing block 40 can also be configured in other shapes, not limited to a trapezoid. As long as the reinforcing block 40 has two sidewalls that can contact the first side beam 10 and the second side beam 20, or the surfaces of the first side beam 10 and the partition beam 30, it is acceptable. Furthermore, the positions of the first sidewall 42 and the second sidewall 43 can be adjusted according to the welding position of the reinforcing block 40, and are not limited to the welding methods described above.

[0067] See also Figure 5 and Figure 6 The reinforcing block 40 has an internal cavity 44 to reduce its weight, thereby reducing the weight of the entire battery pack 100 and contributing to its lightweight design. Simultaneously, support ribs 45 are provided within the cavity 44 to improve the overall strength of the reinforcing block 40 and prevent a decrease in its overall strength due to the cavity 44. The number of cavities 44 and support ribs 45 can be adjusted according to requirements, and this application does not impose specific limitations on them.

[0068] Preferred, such as Figure 6 As shown, the penetration depth of the first weld 41 is L7mm, and the thickness of the first sidewall 42 and the second sidewall 43 is L8mm, where 0.2≤L7mm / L8mm≤0.7. The thickness of the first sidewall 42 and the second sidewall 43 can be understood, for example, as the straight-line distance between the contact surface between the first sidewall 42 and the first side beam 10 and the cavity 44, and the straight-line distance between the contact surface between the second sidewall 43 and the second side beam 20 or the partition beam 30 and the cavity 44. The first weld 41, the first sidewall 42, and the second sidewall 43, which meet the above-mentioned range, can, on the one hand, ensure that the thickness of the first sidewall 42 and the second sidewall 43 is large enough to ensure that the reinforcing block 40 will not be "melted through" during the welding process, that is, to ensure the welding strength between the first sidewall 42 and the first side beam 10 and the second sidewall 43 and the second side beam 20 or the partition beam 30; on the other hand, they will not make the thickness of the first sidewall 42 and the second sidewall 43 too large, so as to avoid the reinforcing block 40 being too heavy and thus increasing the weight of the battery box 100 too much.

[0069] For example, the L7mm / L8mm ratio can be 0.2, 0.3, 0.4, 0.5, 0.6, or 0.7, etc. In use, the L7mm / L8mm ratio can be adjusted according to the material and strength of the reinforcing block 40, and is not limited to the ratios listed above.

[0070] In one alternative implementation, see [link to implementation details]. Figure 6 and Figure 7 The end of the partition beam 30 is welded to the first side beam 10 to form a second weld 31; the second surface 47 of the reinforcing block 40, the partition beam 30 and the first side beam 10 together form a gap 50; the second weld 31 is located within the gap 50.

[0071] As described above, the first sidewall 42 of the reinforcing block 40 is welded to the first side beam 10, and the second sidewall 43 is welded to the partition beam 30. Thus, the partition beam 30, the first side beam 10, and the second surface 47 together form a gap 50. The two ends of the partition beam 30 in the width direction of the battery box are welded to their corresponding first side beams 10. This forms a second weld 31 at the angle formed by the end of the partition beam 30 and the first side beam 10, and the second weld 31 extends along the height direction of the first side beam 10. The second weld 31 and the first weld 41 provide "double protection" for the connection between the first side beam 10 and the partition beam 30. Furthermore, by placing the second weld 31 within the gap 50, interference with the welding between the reinforcing block 40 and the first side beam 10, and between the reinforcing block 40 and the partition beam 30, can be avoided.

[0072] <Example Battery Pack> This disclosure also provides a battery pack, such as... Figure 8 As shown, the battery pack includes multiple battery cells 60 and a battery housing as described above, with the multiple battery cells arranged in the battery compartment of the battery housing.

[0073] <Example Electrical Equipment> This disclosure also provides an electrical device including the battery pack described above. This electrical device can be, for example, a vehicle, ship, aircraft, household appliance, industrial equipment, or energy storage device. The vehicle can be, for example, a passenger car, a truck, or a construction vehicle. 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 all possible combinations separately.

[0074] 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 is not intended to exclude other components or parts.

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

[0076] 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.

[0077] 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 housing, characterized in that, Includes a frame, a base plate, and a partition beam (30). The frame surrounds the edge of the base plate and forms a receiving cavity with the base plate. The partition beam (30) is disposed in the receiving cavity and divides the receiving cavity into at least two compartments. The frame includes an adjacent first side beam (10) and a second side beam (20), and the partition beam (30) is connected to the first side beam (10); A reinforcing block (40) is provided at the connection between the first side beam (10) and the second side beam (20). The reinforcing block (40) is welded to the first side beam (10) and the second side beam (20) respectively, and the first weld (41) is arranged at intervals along the periphery of the reinforcing block (40); and / or, A reinforcing block (40) is provided at the connection between the partition beam (30) and the first side beam (10). The reinforcing block (40) is welded to the partition beam (30) and the first side beam (10), and the first weld (41) is arranged at intervals along the periphery of the reinforcing block (40).

2. The battery housing as described in claim 1, characterized in that, The total length of the entire periphery of the reinforcing block (40) used for welding with the first side beam (10), the second side beam (20) and the partition beam (30) is L1mm, and the total length of the first weld (41) located on the periphery of the reinforcing block (40) is L2mm, 0.5≤L2mm / L1mm≤0.

8.

3. The battery housing as described in claim 2, characterized in that, The partition beam (30) includes a first partition beam (301) and a second partition beam (302). The first partition beam (301) divides the interior of the frame into an electrical compartment (101) and a battery compartment (102). The second partition beam (302) divides the battery compartment (102) into at least two housing units. A first reinforcing block (401) is provided at the connection between the first partition beam (301) and the first side beam (10), and a second reinforcing block (402) is provided at the connection between the second partition beam (302) and the first side beam (10). The total length of the first weld (41) located around the first reinforcing block (401) is greater than the total length of the first weld (41) located around the second reinforcing block (402).

4. The battery housing as described in claim 2, characterized in that, The value of L1mm ranges from 150mm to 400mm, and / or, The value of L2mm ranges from 75mm to 320mm.

5. The battery housing as described in claim 1, characterized in that, In the height direction of the first side beam (10), the top surface of the reinforcing block (40) is lower than the top surface of the frame.

6. The battery housing as described in claim 1, characterized in that, The frame includes two opposing first side beams (10) and two opposing second side beams (20), wherein the first side beams (10) and the second side beams (20) are perpendicular to each other; The length of the first side beam (10) is L3mm, the distance between the two first side beams (10) is L4mm, and 1≤L3mm / L4mm≤4.

7. The battery housing as described in claim 6, characterized in that, The value of L3mm ranges from 1000mm to 3000mm, and / or, The value of L4mm ranges from 250mm to 1500mm.

8. The battery housing as described in claim 1, characterized in that, The first side beam (10) includes a first part (11) and a second part (12). In the thickness direction of the first side beam (10), one side of the second part (12) is connected to the bottom surface of the first part (11), and the other side of the second part (12) extends toward the interior of the frame. The first part (11) is welded to the side of the reinforcing block (40), and the second part (12) is welded to the bottom surface of the reinforcing block (40).

9. The battery housing as described in claim 8, characterized in that, In the height direction of the first side beam (10), the height of the reinforcing block (40) is h1mm, the height of the first part (11) is h2mm, and 0.6≤h1mm / h2mm≤0.

97.

10. The battery housing as described in claim 9, characterized in that, The value of h1mm ranges from 60mm to 120mm, and / or, The value of h2mm ranges from 80mm to 160mm.

11. The battery housing as described in claim 8, characterized in that, In the thickness direction of the first side beam (10), the second part (12) extends into the frame by a dimension of L5mm, and the width of the reinforcing block (40) is L6mm, 1.2≤L5mm / L6mm≤1.

8.

12. The battery housing as described in claim 11, characterized in that, The value of L5mm ranges from 12mm to 40mm, and / or, The value of L6mm ranges from 10mm to 30mm.

13. The battery housing as described in claim 8, characterized in that, The first part (11) and the second part (12) are integrally formed.

14. The battery housing as described in claim 1, characterized in that, The reinforcing block (40) has a first sidewall (42) and a second sidewall (43), the first sidewall (42) being welded to the first side beam (10), and the second sidewall (43) being welded to the second side beam (20); and / or, The first sidewall (42) is welded to the first side beam (10), and the second sidewall (43) is welded to the partition beam (30).

15. The battery housing as described in claim 14, characterized in that, The reinforcing block (40) has a cavity (44) inside, and a supporting rib (45) is provided inside the cavity (44).

16. The battery housing as described in claim 15, characterized in that, The penetration depth of the first weld (41) is L7mm, and the thickness of the first sidewall (42) and the second sidewall (43) is L8mm, 0.2≤L7mm / L8mm≤0.

7.

17. The battery housing as described in claim 14, characterized in that, The end of the partition beam (30) is welded to the first side beam (10) to form a second weld (31). The reinforcing block (40) has a first surface (46) and a second surface (47) arranged opposite to each other, and the second surface (47), the partition beam (30) and the first side beam (10) together form a gap (50). The second weld (31) is located within the interval (50).

18. A battery pack, characterized in that, It includes a plurality of battery cells and a battery housing as described in any one of claims 1 to 17, wherein the plurality of battery cells are arranged in the battery housing.

19. An electrical appliance, characterized in that, Includes the battery pack as described in claim 18.

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