Battery box and battery pack

Abstract

The present disclosure relates to the technical field of batteries, and provides a battery box and a battery pack. The battery box comprises a body and a cooling assembly. The body comprises a frame and a box plate. The frame comprises a plurality of columns and a plurality of beams. An individual beam of the plurality of beams is located between two adjacent columns, and the two ends of the beam are fixed to the two columns. The box plate is wrapped on the outer side of the frame. The box plate has a plurality of side walls and a bottom wall. The plurality of side walls are located on the peripheral side of the frame, and the bottom wall is located on the bottom surface of the frame. There is a gap between a first side wall of the plurality of side walls and a first beam of the plurality of beams. The cooling assembly comprises a water nozzle and a heat exchange plate. The heat exchange plate has a plate body and a protruding portion. The protruding portion protrudes from the edge of the plate body, and the end of the protruding portion is located in the gap. One end of the water nozzle penetrates through the first side wall and communicates with the protruding portion. A flange is arranged on the outer peripheral surface of the water nozzle. The flange is arranged in parallel with the first side wall, and the flange and the first side wall are connected by a plurality of fasteners.

Description

Technical Field

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

[0002] Battery packs, used for storing and providing electrical energy, are widely used in various devices. During operation, battery packs generate a significant amount of heat; failure to dissipate this heat promptly can lead to overheating and impair battery pack performance.

[0003] Currently, cooling is achieved by installing heat exchange plates inside the battery pack and introducing cooling medium through water nozzles into these plates. To ensure effective contact between the water nozzles and the heat exchange plates, the nozzles are typically fixed to the battery housing. However, improper connection methods can cause the nozzles to shift, affecting the seal between them and the heat exchange plates. Utility Model Content

[0004] In view of this, the present disclosure provides a battery housing and a battery pack, which aims to at least improve the problem of unstable water tap fixation and displacement.

[0005] In a first aspect, this disclosure provides a battery housing, comprising a body and a cooling assembly. The body includes a frame and a panel. The frame includes a plurality of uprights and a plurality of crossbeams. The uprights extend along the height direction of the body, and a single crossbeam is located between two adjacent uprights, with both ends of the crossbeam fixed to the two uprights respectively. The panel covers the outside of the frame and is connected to the plurality of uprights and the plurality of crossbeams. The panel has a plurality of side walls and a bottom wall. The side walls are located around the periphery of the frame, and the bottom wall is located around the frame. The bottom surface of the device has a gap between the first sidewall of the plurality of sidewalls and the first crossbeam of the plurality of crossbeams; the cooling assembly includes a water nozzle and a heat exchange plate, the heat exchange plate is disposed within the frame and located on the bottom wall, the heat exchange plate has a plate body and a protrusion, the protrusion protrudes from the edge of the plate body and the end of the protrusion is located within the gap; one end of the water nozzle passes through the first sidewall and communicates with the protrusion; a flange is provided on the outer peripheral surface of the water nozzle, the flange is arranged parallel to the first sidewall and the flange is connected to the first sidewall by a plurality of fasteners.

[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] According to the battery housing and battery pack provided in this disclosure, by setting a flange on the outer periphery of the water nozzle and connecting the flange to the first side wall of the battery housing with multiple fasteners, the water nozzle is fixed to the first side wall, thereby improving the stability and durability of the connection between the water nozzle and the first side wall. Even if the water nozzle is disassembled and reassembled multiple times, the connection between the water nozzle and the first side wall can be maintained by simply replacing the fasteners, thereby ensuring the sealing effect between the water nozzle and the heat exchange plate. Attached Figure Description

[0008] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0009] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0010] 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.

[0011] Figure 1 This is a schematic diagram of an exemplary battery box.

[0012] Figure 2 This is a schematic diagram of an exemplary framework.

[0013] Figure 3 for Figure 1 The battery compartment shown is a top view.

[0014] Figure 4 This is a schematic diagram of the assembly between the protrusion and the first crossbeam.

[0015] Figure 5 for Figure 4 Enlarged view of point D in the middle.

[0016] Figure 6 for Figure 1 The left view of the battery box shown.

[0017] Figure 7 for Figure 3 The battery box shown is a cross-sectional view along the AA direction.

[0018] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0019] Figure 9 This is a schematic diagram of an exemplary cooling component.

[0020] Figure 10 for Figure 9 A magnified view of point C in the middle.

[0021] Figure 11 for Figure 9The diagram shows the structure of the cooling component from one perspective.

[0022] Figure 12 for Figure 8 The diagram shows the relevant dimensions of the faucet and flange.

[0023] Explanation of reference numerals in the attached drawings: 100, battery housing; 10, main body; 101, column; 102, crossbeam; 11, first side wall; 12, second side wall; 20, cooling assembly; 21, water nozzle; 22, heat exchange plate; 221, plate body; 222, protrusion; 23, flange; 231, groove; 30, fastener; 40, seal; 50, gap; 60, notch; 70, positioning post. Detailed Implementation

[0024] 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.

[0025] In related technologies, heat exchange plates are placed inside the battery housing to effectively and promptly cool multiple battery cells. To maintain a consistently low temperature for the cooling medium within the heat exchange plates, water nozzles are used to connect the heat exchange plates to external pipes through the battery housing, ensuring continuous circulation between the cooling medium inside the heat exchange plates and the external cooling medium.

[0026] To ensure a proper seal between the water nozzle and the heat exchange plate, the water nozzle is fixedly connected to the battery housing. In existing technology, the outer circumference of the water nozzle has multiple external threads, and the hole in the battery housing through which the water nozzle passes has multiple internal threads. The threaded connection between the water nozzle and the battery housing is achieved through these multiple external and internal threads. However, after repeated disassembly and reassembly of the water nozzle, or after prolonged use, the external threads on the outer circumference of the water nozzle may corrode or wear, preventing a secure connection between it and the battery housing. Under external force, the water nozzle is prone to displacement, affecting the connection between the water nozzle and the heat exchange plate, leading to poor sealing and even leakage of the cooling medium, thus impacting the safety performance of the battery pack.

[0027] The inventors discovered that the cause of the above problems is that the water nozzle is connected to the first side wall through the thread on its outer circumference. After multiple disassemblies or long-term use, the thread wears out severely, making it impossible to achieve a stable connection between the water nozzle and the first side wall. This causes the water nozzle to shift relative to the first side wall, thereby affecting the sealing effect between the water nozzle and the heat exchange plate.

[0028] To address the aforementioned problems, the inventors made numerous attempts and ultimately creatively proposed the following technical solution: A flange is installed around the water tap, and the flange is connected to the first side wall of the battery housing using multiple fasteners. This fixes the water tap to the first side wall, improving the stability and durability of the connection between the water tap and the first side wall. Even after multiple disassemblies and reassemblies, the connection between the water tap and the first side wall can be maintained simply by replacing the fasteners, thus ensuring a proper seal between the water tap and the heat exchange plate.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] <Example Battery Housing> This disclosure provides a battery housing 100, which includes a body 10 and a cooling assembly 20. The body 10 includes a frame and a panel. The frame includes multiple uprights 101 and multiple crossbeams 102. The uprights 101 extend along the height direction of the body 10, and each crossbeam 102 is located between two adjacent uprights 101, with both ends of the crossbeam 102 fixed to the two uprights 101 respectively. The panel covers the outside of the frame and is connected to the multiple uprights 101 and the multiple crossbeams 102. The panel has multiple side walls and a bottom wall. The side walls are located around the perimeter of the frame, and the bottom wall is located on the bottom surface of the frame. A gap 50 exists between the first sidewall 11 of the plurality of sidewalls and the first crossbeam of the plurality of crossbeams 102; the cooling assembly 20 includes a water nozzle 21 and a heat exchange plate 22, the heat exchange plate 22 is disposed inside the body 10 and located on the bottom wall, the heat exchange plate 22 has a plate body 221 and an extension 222, the extension 222 is provided protruding from the edge of the plate body 221, and the end of the extension 222 is located within the gap 50; one end of the water nozzle 21 passes through the first sidewall 11 and communicates with the extension 222; a flange 23 is provided on the outer peripheral surface of the water nozzle 21, the flange 23 is arranged parallel to the first sidewall 11, and the flange 23 is connected to the first sidewall 11 by a plurality of fasteners 30.

[0034] 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 of the battery housing, i.e., the axis of the water tap; the Y-axis can represent, for example, the width of the battery housing; and the Z-axis can represent, for example, the height of the battery housing.

[0035] See Figures 1 to 2 This embodiment illustrates an approximately rectangular battery case 100, which includes a body 10 and a cooling assembly 20. The body 10 includes a frame and a panel covering the outside of the frame. It is understood that the frame, for example, can form the skeleton of the battery case 100, providing strength and support. The panel allows the battery case 100 to form a sealed space, providing sealing and protection for the multiple battery cells within the battery case 100.

[0036] See also Figure 2The frame includes, for example, multiple uprights 101 and multiple crossbeams 102. The uprights 101 extend along the height direction of the main body 10, meaning their extension direction is parallel to the height direction of the battery box 100. Taking a cuboid battery box 100 as an example: four uprights 101 can be provided, located at the four corners of the battery box 100, forming four edges along the height direction of the battery box 100. The crossbeams 102 can be, for example, two, three, or four. Taking two crossbeams 102 as an example, the two crossbeams 102 are arranged opposite each other, with each crossbeam 102 located between two adjacent uprights 101, and both ends of the crossbeam 102 fixed to the two adjacent uprights 101.

[0037] It should be noted that multiple profiles parallel to the crossbeams 102 can be installed between two adjacent columns 101 to improve the overall support strength of the frame. The number and location of these profiles can be adjusted adaptively according to the usage environment and capacity requirements of the battery box 100 during use; this application does not impose specific limitations on them.

[0038] See Figure 1 and Figure 3 The battery box has multiple side walls and one bottom wall. The multiple side walls are located on the periphery of the frame, and the bottom wall is located on the bottom surface of the frame. Taking the cuboid battery box 100 as an example, the multiple side walls can form, for example, the four surfaces of the battery box 100 on its periphery, and the bottom wall can form, for example, the bottom surface of the battery box 100.

[0039] For example, the multiple sidewalls include two opposing first sidewalls 11 and two opposing second sidewalls 12, which are connected end-to-end to form the peripheral surface of the body 10. The area surrounded by the body 10 can be understood, for example, as the housing space of the battery box 100. This housing space can, for example, house multiple battery cells and electrical components electrically connected to the multiple battery cells.

[0040] The two first sidewalls 11 can be understood as two sidewalls arranged opposite each other along the length of the battery housing 100. As described above, the two crossbeams 102 can also be arranged opposite each other along the length of the battery housing 100. Thus, the two first sidewalls 11 and the two crossbeams 102 are arranged in a one-to-one correspondence. A gap 50 exists between one of the two first sidewalls 11 and its corresponding crossbeam 102.

[0041] The cooling assembly 20 may include, for example, a water nozzle 21 and a heat exchange plate 22. The heat exchange plate 22 is placed within the accommodating space formed by the body 10 and is located above the bottom wall. This allows the heat exchange plate 22 to directly or indirectly contact multiple battery cells, enabling the heat exchange plate 22 to effectively remove heat from the multiple battery cells in a timely manner, thereby reducing the temperature of the multiple battery cells during use and ensuring the safety performance of the battery cells during use.

[0042] Continue to participate Figure 3 The heat exchange plate 22 has a plate body 221 and a protrusion 222. The protrusion 222 protrudes from the edge of the plate body 221, and its end is located within the gap 50. Preferably, the plate body 221 and the protrusion 222 are integrally formed, for example, to reduce connection points and improve the sealing performance of the heat exchange plate 22. The protrusion 222 is provided, for example, at the edge of the plate body 221 near the water nozzle 21 to facilitate communication between the water nozzle 21 and the plate body 221.

[0043] By way of example, one end of the water nozzle 21 passes through the first sidewall 11 with a gap 50 along the length of the battery housing 100, extends into the gap 50 and communicates with the protrusion 222, thereby realizing the communication between the water nozzle 21 and the heat exchange plate 22. For example, at least two water nozzles 21 can be provided. Taking two water nozzles 21 as an example: one water nozzle 21 is the inlet, which delivers the external cooling medium to the heat exchange plate 22; the other water nozzle 21 is the outlet, which discharges the cooling medium with a higher temperature after heat exchange from the heat exchange plate 22. In this way, the cooling medium inside the heat exchange plate 22 can circulate with the external cooling medium, thereby improving the cooling efficiency of the heat exchange plate 22. It should be noted that unless otherwise specified, the number of water nozzles 21 is two.

[0044] Further, see Figure 4 A notch 60 is provided on the first crossbeam 102 corresponding to the gap 50. For example, the notch 60 can be formed by removing a portion of the first crossbeam 102 along the width direction of the battery case 100. The shape and size of the notch 60 can be adapted to, for example, the shape and size of the protrusion 222 so that the protrusion 222 can extend into the gap 50 through the notch 60.

[0045] Furthermore, such as Figure 5As shown, two positioning posts 70 are spaced apart within the notch 60, extending along the height direction of the body 10, with the protrusion 222 located between the two positioning posts 70. It can be understood that the two positioning posts 70 are spaced apart within the notch 60 along the width direction of the battery box 100, and the height of the positioning posts 70 can be, for example, equal to or slightly less than the height of the first crossbeam 102. The protrusion 222 is clamped between the two positioning posts 70 to limit its movement, thereby improving the connection strength between the protrusion 222 and the water nozzle 21. It should also be noted that specific limiting and locking components can be provided at the corresponding positions of the notch 60 to fix the protrusion 222. For example, a limiting member adapted to the notch 60 is provided above the protrusion 222, and a locking bolt adapted to the two positioning posts 70 is also provided. The bolt passes through the limiting member and the positioning posts 70 along the height direction of the battery box 100 to fix the protrusion 222 in the notch 60.

[0046] See Figures 7 to 8 The water nozzle 21 is perpendicular to the first sidewall 11, meaning that the axial direction of the water nozzle 21 is perpendicular to the first sidewall 11. Along the axial direction of the water nozzle 21, one end of the water nozzle 21 extends through the first sidewall 11 into the gap 50 to facilitate communication between the water nozzle 21 and the heat exchange plate 22; the other end of the water nozzle 21 is located outside the battery housing 100 to facilitate communication between the water nozzle 21 and external pipelines. Specifically, a through hole is provided on the first sidewall 11 for the water nozzle 21 to pass through, and one end of the water nozzle 21 can extend along this through hole into the gap 50.

[0047] See Figures 7 to 10 A flange 23 is provided on the outer peripheral surface of the water nozzle 21. The outer peripheral surface of the water nozzle 21 can be understood as a surface perpendicular to the axial direction of the water nozzle 21. That is, the flange 23 is parallel to the first sidewall 11. Multiple fasteners 30 connect the flange 23 and the first sidewall 11, thus fixing the water nozzle 21 to the first sidewall 11.

[0048] For example, when assembling the water tap 21 with the battery housing 100, first, pass the water tap 21 through the through hole on the first side wall 11, and adjust the relative position of the flange 23 and the first side wall 11 so that they are parallel and abutting; then, pass multiple fasteners 30 through the first side wall 11 and the flange 23 in sequence and tighten them, thus fixing the water tap 21 to the first side wall 11. When it is necessary to remove the water tap 21 from the battery housing 100, the multiple fasteners 30 can be loosened and removed from the flange 23 and the first side wall 11, thus separating the water tap 21 from the first side wall 11.

[0049] It is easy to understand that the process of assembling and disassembling the water nozzle 21 from the battery housing 100 only requires the operation of a few fasteners 30. That is, by fixing the water nozzle 21 to the first side wall 11 using multiple fasteners 30 and the flange 23, simply tightening or loosening the fasteners 30 is sufficient to install or remove the water nozzle 21. Compared to the threaded connection between the outer circumference of the water nozzle 21 and the first side wall 11 in existing technologies, the assembly and disassembly of the water nozzle 21 only causes wear to a few fasteners 30. Thus, even if the water nozzle 21 has been disassembled and reassembled multiple times, or after prolonged use, only the fasteners 30 need to be replaced to ensure a stable connection between the water nozzle 21 and the first side wall 11, thereby preventing the sealing effect between the water nozzle and the heat exchange plate 22 from being affected by a loose fixation of the water nozzle 21. Furthermore, replacing only the fasteners 30, compared to replacing the water nozzle 21, not only significantly reduces maintenance costs but also increases operational convenience.

[0050] As an optional implementation, a flexible pad can be provided on the contact surface between the flange 23 and the first sidewall 11. This avoids "rigid friction" caused by direct contact between the flange 23 and the first sidewall 11, thereby reducing wear on both surfaces. Simultaneously, the flexible pad also improves the sealing performance at the connection between the flange 23 and the first sidewall 11, preventing moisture from the environment or cooling medium leaking from the water tap 21 from entering the battery housing 100 through the connection.

[0051] To illustrate this with an example: Figures 9 to 12 As shown, the fastener 30 can be, for example, a nut. The flange 23 has a plurality of first through holes along its circumference, and the first sidewall 11 has a plurality of second through holes, with the plurality of first through holes and the plurality of second through holes corresponding one-to-one. A plurality of nuts pass through the plurality of second through holes and the plurality of first through holes along an axial direction parallel to the water nozzle 21 and are tightened to achieve the connection between the flange 23 and the first sidewall 11.

[0052] Preferably, multiple fasteners 30 are evenly arranged on the outer periphery of the water nozzle 21. This ensures that the flange 23 is subjected to uniform force at all locations, thereby improving the stability of the connection between the water nozzle 21 and the first sidewall 11.

[0053] Optionally, the number of fasteners 30 can be set to, for example, four, five, or six. In use, the number of fasteners 30 can be adjusted adaptively according to factors such as the outer diameter of the water nozzle 21. For example, when the outer diameter of the water nozzle 21 is large, the number of fasteners 30 can be appropriately increased; when the outer diameter of the water nozzle 21 is small, the number of fasteners 30 can be appropriately reduced, and it is not limited to the numbers listed above. This application does not specifically limit the number of fasteners 30.

[0054] Preferably, the flange 23 is welded to the outer circumferential surface of the water nozzle 21. Welding is used to connect the flange 23 and the water nozzle 21, which can improve the connection strength between the flange 23 and the water nozzle 21. Even if the water nozzle 21 is subjected to external impact, the stable connection between the flange 23 and the water nozzle 21 can be ensured, and separation due to weak connection force or connection defects can be avoided.

[0055] Alternatively, flange 23 and nozzle 21 can also be configured as a single integral structure. That is, nozzle 21 and flange 23 can be manufactured as a single integral structure, for example, by casting. In this way, nozzle 21 and flange 23 are a whole, which can also ensure the stability of the connection between the two, thereby preventing the nozzle 21 and flange 23 from separating due to weak connection.

[0056] like Figure 1 , Figure 7 and Figure 8 As shown, flange 23 is located on the side of the first sidewall 11 near the heat exchange plate 22, meaning that flange 23 is located inside the battery housing 100. In this way, flange 23 will not interfere with the connection between the water nozzle 21 and the external pipeline, facilitating operation. Simultaneously, the location of flange 23 on the side of the first sidewall 11 near the heat exchange plate 22 allows the first sidewall 11 to provide a certain degree of restraint on flange 23, further improving the stability of the connection between flange 23 and the first sidewall 11. Even under external force, water nozzle 21 is unlikely to shift.

[0057] like Figures 8 to 12 As shown, a groove 231 surrounding the water nozzle 21 is provided on the side of the flange 23 facing the first sidewall 11, and a sealing element 40 is provided within the groove 231. That is, the groove 231 is located on the surface where the flange 23 contacts the first sidewall 11. Thus, when the sealing element 40 is placed within the groove 231, it is clamped between the flange 23 and the first sidewall 11, improving the sealing performance at the connection point. The sealing element 40 prevents moisture or impurities from outside the battery case 100 from entering the battery case 100 through the connection between the flange 23 and the first sidewall 11. More importantly, when a leak occurs at the connection between the water nozzle 21 and the external pipeline, the sealing element 40 also prevents the leaked cooling medium from entering the battery case 100 from the connection between the flange 23 and the first sidewall 11.

[0058] Optionally, the number of grooves 231 can be set to multiple, and each groove 231 can be provided with a corresponding seal 40; or only one groove 231 can be provided, and multiple seals 40 can be provided in the groove 231 to improve the sealing effect between the flange 23 and the first sidewall 11. The material of the seal 40 can be, for example, a flexible polymer material such as rubber or resin.

[0059] like Figure 12 As shown, the outer diameter of flange 23 is d1mm, and the outer diameter of water nozzle 21 is d2mm, with 0.18≤d2mm / d1mm≤0.7. Flange 23 and water nozzle 21 meeting these ranges allow flange 23 to have a sufficiently large outer diameter compared to water nozzle 21, enabling flange 23 to stably fix water nozzle 21 to the first sidewall 11, thus improving the stability of the connection between water nozzle 21 and the first sidewall 11. Furthermore, it prevents flange 23 from having an excessively large outer diameter, avoiding excessive increases in the weight of the battery housing 100 and contributing to the lightweight design of the battery housing 100.

[0060] Optionally, the d1mm / d2mm ratio can be, for example, 0.18, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7. In use, the d1mm / d2mm ratio can be adjusted adaptively according to factors such as the size of the battery housing 100, and is not limited to the ratios listed above.

[0061] Optionally, the value of d1mm ranges from 35mm to 60mm, and the value of d2mm ranges from 10mm to 30mm.

[0062] For example, the value of d1mm can be 35mm, 38mm, 40mm, 42mm, 45mm, 48mm, 50mm, 53mm, 55mm, 57mm, or 60mm, etc. The value of d2mm can be 10mm, 12mm, 15mm, 20mm, 25mm, 28mm, or 30mm, etc. In use, the values ​​of d1mm and d2mm can be adjusted adaptively according to factors such as the capacity or size of the battery box 100, and are not limited to the values ​​listed above.

[0063] like Figure 8 As shown, the thickness of the flange 23 along the axial direction of the water nozzle 21 is L1mm, with L1mm ranging from 4mm to 12mm. This thickness range ensures that the flange 23 is sufficiently thick to provide adequate strength for firmly fixing the water nozzle 21 to the first sidewall 11, preventing deformation or breakage due to insufficient strength. Furthermore, this thickness range also prevents the flange 23 from becoming excessively thick, thus avoiding excessive weight increase in the battery pack housing 100 and hindering its lightweight design.

[0064] Optionally, the value of L1mm can be, for example, 4mm, 4.5mm, 5mm, 5.6mm, 6mm, 6.5mm, 7mm, 8mm, 9mm, 10mm, 11mm, or 12mm. In use, the value of L1mm can be adjusted according to the material or strength of the flange 23, and is not limited to the values ​​listed above.

[0065] See also Figure 8 In the axial direction of the water nozzle 21, the distance between the end of the water nozzle 21 furthest from the heat exchange plate 22 and the first sidewall 11 is L2mm, with L2mm ranging from 15mm to 30mm. Meeting this distance range allows the portion of the water nozzle 21 outside the battery housing 100 to be sufficiently long, ensuring a large enough connection size between the water nozzle 21 and the external piping, thus providing good sealing performance. Furthermore, this distance range prevents the portion of the water nozzle 21 outside the battery housing 100 from becoming excessively long, thus avoiding an excessive increase in the size of the battery housing 100 and hindering the miniaturization of the battery pack.

[0066] Optionally, the value of L2mm can be, for example, 15mm, 16mm, 18mm, 20mm, 22mm, 25mm, 26mm, 28mm, or 30mm. In use, the value of L2mm can be adjusted according to the size of the faucet 21, etc., and is not limited to the values ​​listed above.

[0067] <Example Battery Pack> 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 a housing space within the battery housing.

[0068] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0069] 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.

[0070] 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 sidewall and the second sidewall), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0071] 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.

[0072] 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, It includes a body (10) and a cooling assembly (20), the body (10) including a frame and a box panel; The frame includes multiple columns (101) and multiple crossbeams (102). The multiple columns (101) extend along the height direction of the body (10). A single crossbeam (102) is located between two adjacent columns, and the two ends of the crossbeam (102) are respectively fixed to the two columns (101). The box panel covers the outside of the frame and is connected to the plurality of columns (101) and the plurality of beams (102). The box panel has a plurality of side walls and a bottom wall. The plurality of side walls are located on the periphery of the frame, and the bottom wall is located on the bottom surface of the frame. There is a gap (50) between the first side wall (11) of the plurality of side walls and the first beam of the plurality of beams (102). The cooling assembly (20) includes a water nozzle (21) and a heat exchange plate (22). The heat exchange plate (22) is disposed inside the body (10) and located on the bottom wall. The heat exchange plate (22) has a plate body (221) and a protrusion (222). The protrusion (222) protrudes from the edge of the plate body (221), and the end of the protrusion (222) is located in the gap (50). One end of the water nozzle (21) passes through the first sidewall (11) and communicates with the protrusion (222); The water nozzle (21) has a flange (23) on its outer peripheral surface. The flange (23) is arranged parallel to the first side wall (11), and the flange (23) is connected to the first side wall (11) by a plurality of fasteners (30).

2. The battery housing as described in claim 1, characterized in that, The flange (23) is welded to the outer peripheral surface of the water nozzle (21), or the flange (23) and the water nozzle (21) are integrally formed.

3. The battery housing as described in claim 1, characterized in that, The flange (23) is located on the side of the first sidewall (11) near the heat exchange plate (22).

4. The battery housing as described in claim 1, characterized in that, The flange (23) has a plurality of first through holes along its circumference, and the first sidewall (11) has a plurality of second through holes, the plurality of first through holes and the plurality of second through holes corresponding one to one; The plurality of fasteners (30) pass through the plurality of first through holes and the plurality of second through holes.

5. The battery housing as described in claim 1, characterized in that, The flange (23) has a groove (231) surrounding the water nozzle (21) on the side facing the first sidewall (11), and a seal (40) is provided in the groove (231).

6. The battery housing as described in claim 1, characterized in that, The outer diameter of the flange (23) is d1mm, and the outer diameter of the water nozzle (21) is d2mm, 0.18≤d2mm / d1mm≤0.

7.

7. The battery housing as described in claim 6, characterized in that, The value of d1mm ranges from 35mm to 60mm; and / or, The value of d2mm ranges from 10mm to 30mm.

8. The battery housing as described in claim 1, characterized in that, Along the axial direction of the water nozzle (21), the thickness of the flange (23) is L1mm, and the value of L1mm ranges from 4mm to 12mm.

9. The battery housing as described in claim 1, characterized in that, In the axial direction of the water nozzle (21), the distance between the end of the water nozzle (21) away from the heat exchange plate (22) and the first sidewall (11) is L2mm, and the value of L2mm ranges from 15mm to 30mm.

10. The battery housing as described in claim 1, characterized in that, The first crossbeam has a notch (60), and the protrusion (222) extends through the notch (60) into the gap (50).

11. The battery housing as described in claim 10, characterized in that, Two positioning posts (70) are spaced apart within the notch (60). The two positioning posts (70) extend along the height direction of the body (10), and the protrusion (222) is located between the two positioning posts (70).

12. 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 11, wherein the plurality of battery cells are arranged in the battery housing.

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