Hanging assembly for box body and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a mounting assembly for a box body and a battery pack, the mounting assembly comprises a first sleeve, a second sleeve and a nut; the first sleeve is provided with a blocking piece, the blocking piece is arranged at the end, extending out of the box body, of the first sleeve, and the blocking piece abuts against the box body. The second sleeve is arranged outside the first sleeve in a sleeving manner, and the first sleeve and the second sleeve are screwed through threads; the head of the second sleeve extends out of the box body, and the nut is screwed with the head of the second sleeve. The problems that an existing middle hanging assembly needs to be installed in a matched mode through a middle beam, and the space utilization rate in a battery pack is not high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides a mounting assembly for a box and a battery pack. Background Art

[0002] At present, with the rapid development of the new energy industry, new energy equipment such as electric vehicles and electric aircraft have been widely used, and battery packs as the core part of new energy equipment have also received widespread attention.

[0003] Generally, a mounting assembly is provided on the battery pack case to connect the battery pack case to the new energy device. In the prior art, a middle mounting assembly is provided, which is provided in the middle beam of the battery pack to achieve connection with the battery pack case.

[0004] However, the central mounting assembly requires the cooperation of the middle beam of the battery pack to be installed. Moreover, the installation of the middle beam will also occupy a certain amount of space in the pack, resulting in reduced space utilization of the battery pack.

[0005] In order to solve the above problems, the present application provides a new mounting component to overcome the above problems. Utility Model Content

[0006] The utility model aims to solve the problem that the existing middle mounting assembly requires the cooperation of the middle beam for installation and the space utilization rate in the battery pack is low.

[0007] In a first aspect, the utility model provides a mounting assembly for a box, the mounting assembly comprising a first sleeve, a second sleeve and a nut; the first sleeve is provided with a blocking member, the blocking member is arranged at the end of the first sleeve extending out of the box, and the blocking member abuts against the box; the second sleeve is sleeved on the outside of the first sleeve, and the first sleeve and the second sleeve are screwed together by a thread; the head of the second sleeve extends out of the box, and the nut is screwed together with the head of the second sleeve.

[0008] Optionally, a first sealing member is provided at the abutment portion between the blocking member and the box body.

[0009] Optionally, a second sealing member is provided at the connection between the first sleeve and the second sleeve.

[0010] Optionally, a third sealing member is provided at the connection between the second sleeve and the box body.

[0011] Optionally, the second sleeve includes a first cylinder disposed inside the box body and a second cylinder extending out of the box body, and the diameter of the first cylinder is greater than the diameter of the second cylinder.

[0012] Optionally, the box body includes an upper cover and a bottom plate, the first side of the first cylinder abuts against the upper cover, and the second side of the first cylinder abuts against the bottom plate.

[0013] Optionally, the box is used to accommodate a cylindrical battery cell, and the diameter of the first cylinder is equal to the diameter of the cylindrical battery cell.

[0014] Optionally, a first through hole is provided inside the first sleeve, a second through hole is provided inside the second sleeve, and the first through hole and the second through hole are connected; the mounting assembly also includes a mounting rod, which is passed through the first through hole and the second through hole; the first end of the mounting rod extends out of the first sleeve, and the second end of the mounting rod extends out of the second sleeve; the first end of the mounting rod and the second end of the mounting rod are respectively connected to the new energy equipment.

[0015] In a second aspect, the present invention further provides a battery pack, comprising a box body and battery cells housed inside the box body, wherein the battery pack box body is provided with any one of the mounting assemblies described above.

[0016] Optionally, dummy cells are provided around the mounting component.

[0017] Optionally, the battery pack further includes a thermal management component, and the mounting component and the thermal management component are connected via a first reinforcement member.

[0018] Optionally, the battery pack further includes a support assembly, and the mounting assembly and the support assembly are connected via a second reinforcement member.

[0019] In a third aspect, the present invention further provides a new energy device, which includes the battery pack as described above.

[0020] Compared with the existing technology, the present invention has obvious advantages and beneficial effects. By means of the above technical solution, the mounting assembly and battery pack for the box provided by the present invention can achieve considerable technological advancement and practicality, and has wide industrial application value, and has at least the following advantages:

[0021] When adopting the above-mentioned technical solution, the utility model provides a new mounting assembly, which only requires openings to be set on both sides of the battery pack box (such as the upper cover and the bottom plate). After the first sleeve and the second sleeve are screwed together, the head of the second sleeve extends to the first side outside the box. One end of the blocking member set on the first sleeve abuts against the second side outside the box. The mounting assembly and the box can be connected by a nut without the need for other matching components (such as a middle beam, etc.), which can effectively improve the space utilization inside the battery pack box.

[0022] Furthermore, with the development of cell-to-pack (CTP) and cell-to-chassis (CTC) technologies, the battery pack structure has increasingly improved the space utilization within the battery pack. At the same time, the structural rigidity requirements of the battery pack and new energy equipment (such as automobiles) need to be met, requiring further optimization and integration of the mounting points and the internal structure of the battery pack. Therefore, the present invention proposes a mounting assembly having a sleeve with a diameter consistent with the diameter of the battery cell. By stacking the battery cells, the sleeve is integrated into the battery pack and becomes part of the battery pack, thereby maximizing the utilization of the internal space of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0024] Figure 1 A cross-sectional view of a battery pack box provided by the present invention;

[0025] Figure 2 A top view of a battery pack provided by the utility model;

[0026] Figure 3 for Figure 2 Magnified view of area A in the middle.

[0027] List of reference numerals:

[0028] 10. Mounting assembly; 101. First sleeve; 1011. Blocking member; 1012. First through hole; 102. Second sleeve; 1021. First cylinder; 10211. First side of the first cylinder; 10212. Second side of the first cylinder; 1022. Second cylinder; 1023. Second through hole; 103. Nut; 20. Housing; 201. Upper cover; 202. Bottom plate; 301. First seal; 302. Second seal; 303. Third seal; 40. Battery cell; 50. Thermal management assembly; 60. Support assembly; 701. First reinforcement; 702. Second reinforcement; 80. Pseudo battery cell. DETAILED DESCRIPTION

[0029] As mentioned in the background, existing spring-loaded explosion-proof valves may retract due to the spring force after opening. Specifically, existing explosion-proof valves generally come in two types: spring-loaded and ejector-type. These two types typically extend beyond the outer surface of the battery pack after installation, occupying more space. Furthermore, spring-loaded explosion-proof valves may retract due to the spring force after opening, causing the pressure relief valve to close again. Ejector-type valves do not return to their original shape after opening, but generally have a higher opening pressure.

[0030] In order to solve the problems of existing explosion-proof valves, the present application provides a new pressure relief assembly.

[0031] Please refer to the attached Figures 1 to 3 It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0032] It should be noted that in the description of this utility model, terms such as "inner," "outer," "upper," "lower," "top," and "bottom" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "installed" should be understood in a broad sense, for example, to refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0034] First, see Figures 1 to 3 The present invention provides a mounting assembly 10 for a housing 20, wherein the housing 20 may be a housing of a battery pack. The mounting assembly 10 includes a first sleeve 101, a second sleeve 102, and a nut 103. The first sleeve 101 is provided with a stopper 1011, which is disposed at the end of the first sleeve 101 extending out of the housing 20 and abuts against the housing 20. The second sleeve 102 is sleeved on the outside of the first sleeve 101, and the first and second sleeves 101, 102 are screwed together by threads. The head of the second sleeve 102 extends out of the housing 20, and the nut 103 is screwed into the head of the second sleeve 102.

[0035] Alternatively, the blocking member 1011 may be a flange protruding from the exterior of the first sleeve 101. Alternatively, the blocking member 1011 may be one or more bosses protruding from the exterior of the first sleeve 101. Alternatively, the blocking member 1011 may have other structures, requiring only that the blocking member 1011 abut against the exterior of the housing 20, while the remaining portions of the first sleeve 101 are disposed within the interior of the housing 20.

[0036] Alternatively, a first thread may be provided on the outer surface of the first sleeve 101, and a second thread corresponding to the first thread may be provided on the inner surface of the second sleeve 102. The second sleeve 102 is sleeved onto the outer surface of the first sleeve 101, and the two are screwed together. The screwing of the first sleeve 101 and the second sleeve 102 can achieve a simple and effective connection between the first sleeve 101 and the second sleeve 102, forming the sleeve of the mounting assembly 10.

[0037] The head of the second sleeve 102 extends out to the first side outside the box body 20 , and one end of the blocking member 1011 provided on the first sleeve 101 abuts against the second side outside the box body 20 .

[0038] In a specific embodiment, the box body 20 includes an upper cover 201 and a bottom plate 202, the head of the second sleeve 102 extends to the outside of the upper cover 201, and the first sleeve 101 is provided with one end of a blocking member 1011 abutting against the outside of the bottom plate 202, thereby realizing the mounting of the box body 20 through the mounting assembly 10.

[0039] In another specific embodiment, the head of the second sleeve 102 extends out of the bottom plate 202 , and one end of the blocking member 1011 provided on the first sleeve 101 abuts against the outside of the upper cover 201 .

[0040] Through the aforementioned mounting assembly 10, it is only necessary to set openings on both sides of the battery pack box 20 (such as the upper cover 201 and the bottom plate 202). After the first sleeve 101 and the second sleeve 102 are screwed together, the head of the second sleeve 102 extends to the first side outside the box 20. The first sleeve 101 is provided with a blocking member 1011, one end of which abuts against the second side outside the box 20. The mounting assembly 10 and the box 20 can be connected by the nut 103 without the need for other matching components (such as the middle beam, etc.), which can effectively improve the space utilization inside the battery pack box 20.

[0041] In one embodiment, in order to ensure a sealed connection between the mounting assembly 10 and the box body 20, a sealing member may be provided at the connection between the mounting assembly 10 and the box body 20. The sealing member may be made of materials such as silicone and rubber.

[0042] Specifically, the sealing member and its setting position may include at least one of the following three embodiments:

[0043] In embodiment 1, a first sealing member 301 is provided at the contact point between the blocking member 1011 and the housing 20 , thereby ensuring that the contact point between the first sleeve 101 and the housing 20 is sealed.

[0044] In Example 2, a second sealing member 302 is provided at the connection between the first sleeve 101 and the second sleeve 102. This ensures that the contact area between the first sleeve 101 and the second sleeve 102 is sealed.

[0045] In embodiment 3, a third sealing member 303 is provided at the connection between the second sleeve 102 and the box body 20. This ensures that the contact area between the second sleeve 102 and the box body 20 is sealed.

[0046] In a preferred embodiment, when the mounting assembly 10 is connected to the box body 20, the above-mentioned first seal 301, second seal 302 and third seal 303 are set at the same time, and seals are set at each connection point, which can effectively ensure the sealed connection between the mounting assembly 10 and the box body 20.

[0047] In one embodiment, the second sleeve 102 includes a first cylinder 1021 disposed inside the box body 20 and a second cylinder 1022 extending from the box body 20 . The diameter of the first cylinder 1021 is greater than the diameter of the second cylinder 1022 .

[0048] Specifically, the main body of the second sleeve 102 is a cylindrical structure. The diameter of the second cylinder 1022 (i.e., the head of the second sleeve 102), which extends out of the housing 20, is smaller than the diameter of the first cylinder 1021 inside the housing 20. This facilitates the connection between the second cylinder 1022 and the nut 103. The larger diameter of the first cylinder 1021 ensures the mechanical performance of the mounting assembly 10.

[0049] In a specific embodiment, the first side 10211 of the first cylinder 1021 abuts against the upper cover 201 , and the second side 10212 of the first cylinder 1021 abuts against the bottom plate 202 .

[0050] That is, the height of the first cylinder 1021 located inside the box body 20 is equal to the height inside the box body 20 (wherein the height inside the box body 20 refers to the distance between the upper cover and the bottom plate). This allows the area where the first sleeve 101 is arranged inside the box body 20 to be entirely arranged inside the second sleeve 102, which can effectively improve the mechanical properties of the mounting assembly 10.

[0051] In one embodiment, the housing 20 is free of intermediate beams (including horizontal and longitudinal beams), and the mounting assembly 10 is placed directly inside the battery pack, alongside the cells. Eliminating the intermediate beam within the battery pack significantly increases the space utilization within the battery pack. Optionally, the surface of the mounting assembly 10 can be insulated to ensure electrical insulation between the mounting assembly 10 and the cells 40.

[0052] In a specific embodiment, see Figure 2 and Figure 3 The housing 20 is used to accommodate the cylindrical battery cell 40, and the diameter of the first cylinder 1021 is equal to the diameter of the cylindrical battery cell 40. Therefore, the portion of the mounting assembly 10 located inside the housing 20 (i.e., the first cylinder 1021) can be made into a cylindrical shape similar to the cylindrical battery cell 40, thereby allowing the mounting assembly 10 to be better integrated into the battery cell block and become part of the battery cell block, thereby maximizing the utilization of the internal space of the battery pack housing 20.

[0053] With the development of cell-to-pack (CTP) and cell-to-chassis (CTC) technologies, battery pack structures are increasingly utilizing the internal space of the battery pack. At the same time, the structural rigidity requirements of the battery pack and new energy equipment (such as automobiles) need to be met, requiring further optimization and integration of the mounting points and the internal structure of the battery pack. Therefore, the present invention proposes a mounting assembly 10 having a sleeve with a diameter consistent with the diameter of the battery cell. By stacking the battery cells, the sleeve is integrated into the battery pack and becomes part of the battery pack, maximizing the utilization of the internal space of the battery pack.

[0054] In one embodiment, a first through hole 1012 is defined within the first sleeve 101, and a second through hole 1023 is defined within the second sleeve 102. The first through hole 1012 and the second through hole 1023 are connected. That is, the middle portion of the mounting assembly 10 is open along the height of the battery pack (including the connected first through hole 1012 and the connected through hole 1023).

[0055] The mounting assembly 10 also includes a mounting rod (not shown in the figure), which is inserted into the first through hole 1012 and the second through hole 1023; the first end of the mounting rod extends out of the first sleeve 101, and the second end of the mounting rod extends out of the second sleeve 102; the first end of the mounting rod and the second end of the mounting rod are respectively connected to the new energy equipment.

[0056] Optionally, both the first and second ends of the mounting rod are provided with threads, the first end of the mounting rod is connected to the first side of the new energy device through a nut, and the second end of the mounting rod is connected to the second side of the new energy device through a nut.

[0057] In some scenarios where battery packs are automatically replaced (commonly known as "battery swapping"), the battery pack can be removed from the new energy equipment (such as the vehicle body) by unscrewing the nuts on both sides of the mounting rod, enabling quick battery replacement.

[0058] In a second aspect, the present invention further provides a battery pack, which includes a box body 20 and battery cells 40 housed inside the box body 20 , and the battery pack box body 20 is provided with any one of the mounting assemblies 10 described above.

[0059] Specifically, the housing 20 may include an upper cover 201, a lower housing (not shown), and a bottom plate 202. The lower housing includes a plurality of side walls connected end to end. The upper cover 201 and bottom plate 202 are respectively attached to the two sides of the lower housing, thereby forming a sealed cell cavity within the housing, and the cell group is disposed within the cell cavity. The mounting assembly 10 and the cell 40 are stacked together to form a cell group.

[0060] It should be noted that the battery cells mentioned in the present invention include but are not limited to one or more of cylindrical battery cells, prismatic battery cells, and soft-pack battery cells. If prismatic battery cells are used, the shape of the mounting assembly 10 can be set to a rectangular parallelepiped or a cube to facilitate the stacking of the mounting assembly 10 and the battery cells 40.

[0061] In one embodiment, dummy battery cells 80 are provided around the mounting assembly 10 .

[0062] The pseudo-cell 80 is a structure that is similar in shape and size to the cell 40 but does not contribute to power supply. The pseudo-cell 80 can be a cylindrical sleeve made of plastic or steel, which directly matches the cylindrical cell. The pseudo-cell 80 is provided to meet the requirements of cell stacking while preventing the mounting assembly 10 from affecting surrounding cells due to stress.

[0063] Optionally, the cells around the mounting assembly 10 may be replaced with dummy cells 80. Alternatively, some cells around the mounting assembly 10 may be replaced with dummy cells 80, such as Figure 3 Among the six battery cells around the mounting component 10, there are two pseudo battery cells 80 and the remaining four are normal battery cells.

[0064] In one embodiment, the battery pack further includes a thermal management component 50 , and the mounting component 10 and the thermal management component 50 are connected via a first reinforcement member 701 .

[0065] The thermal management assembly 50 can be referred to as a cooling plate, cold plate, hot plate, liquid cooling plate, or liquid cooling tube. A flow channel is provided within the thermal management assembly 50 for circulating a coolant. By increasing or decreasing the temperature of the coolant, the battery cells 40 can be heated or cooled. The coolant can be a liquid such as ethylene glycol or water.

[0066] When the battery cell 40 is a cylindrical battery cell, the thermal management assembly 50 matches the side shape of the cylindrical battery cell 40. Furthermore, the side of the thermal management assembly 50 is aligned with the curved side of the cylindrical battery cell 40. If the battery cell 40 is another type of battery cell, the shape of the thermal management assembly 50 can be adjusted to fit the battery cell surface.

[0067] Optionally, a thermal management component 50 may be provided between every two rows of cylindrical battery cells 20. Alternatively, a thermal management component 50 may be provided every multiple rows (eg, two rows) of cylindrical battery cells 10.

[0068] In order to prevent the force of the mounting component 10 from affecting the thermal management component 50, a first reinforcement member 701 can be set between the two. The first reinforcement member 701 can be a buffer pad, glue with a certain thickness, or any other structure that can achieve buffering or enhance the rigidity of the relevant parts of the thermal management component 50.

[0069] In another embodiment, the battery pack further includes a support assembly 60 , and the mounting assembly 10 and the support assembly 60 are connected via a second reinforcement member 702 .

[0070] The support assembly 60 is a structure used to support the battery cells 40. For cylindrical battery cells, the support assembly 60 can be a curved plate with no internal flow channels and a side surface that fits the multiple cylindrical battery cells. The support assembly 60 is a structural component that provides mechanical reinforcement when forming the battery cell group.

[0071] In order to prevent the force of the mounting component 10 from affecting the supporting component 60, a second reinforcement member 702 can be set between the two. The second reinforcement member 702 can be a buffer pad, glue with a certain thickness, or any other structure that can achieve buffering or enhance the rigidity of the relevant parts of the supporting component 60.

[0072] In one embodiment, see Figure 3 Among the three adjacent rows of cylindrical cells 40, a thermal management assembly 50 is positioned between two rows of cylindrical cells 40, and a support assembly 60 is positioned between the other two rows of cylindrical cells 40. The mounting assembly 10 occupies the space of one of the cylindrical cells, fully integrated into the cell group. The mounting assembly 10 and the thermal management assembly 50 are connected by a first reinforcement member 701, and the mounting assembly 10 and the support assembly 60 are connected by a second reinforcement member 702.

[0073] Optionally, the gaps between the above components may be filled with potting glue to form an integral battery cell assembly.

[0074] Thus, the mounting assembly 10 forms a rigid whole through the adhesion with the surrounding battery cells 40, thermal management assembly 50, support assembly 60, and the side of the potting compound, which can improve the overall rigidity and modulus when the battery pack is connected to the new energy device.

[0075] On the third aspect, the present invention also provides a new energy device. The new energy device of the present invention may include the above-mentioned battery pack. The new energy device may refer to electric vehicles, electric aircraft and other equipment.

[0076] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims of this application, any of the claimed embodiments may be used in any combination.

[0077] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A mounting assembly for a box, characterized in that: The mounting assembly includes a first sleeve, a second sleeve and a nut; The first sleeve is provided with a blocking member, which is arranged at the end of the first sleeve extending out of the box body, and the blocking member abuts against the box body; The second sleeve is sleeved on the outside of the first sleeve, and the first sleeve and the second sleeve are screwed together by threads; The head of the second sleeve extends out of the box body, and the nut is screwed with the head of the second sleeve.

2. The mounting assembly according to claim 1, characterized in that: A first sealing member is provided at the abutting position between the blocking member and the box body.

3. The mounting assembly according to claim 1, wherein: A second sealing member is provided at the connection between the first sleeve and the second sleeve.

4. The mounting assembly according to claim 1, wherein: A third sealing member is provided at the connection between the second sleeve and the box body.

5. The mounting assembly according to claim 1, characterized in that: The second sleeve includes a first cylinder arranged inside the box body and a second cylinder extending out of the box body, and the diameter of the first cylinder is greater than the diameter of the second cylinder.

6. The mounting assembly according to claim 5, characterized in that: The box body includes an upper cover and a bottom plate. The first side of the first cylinder abuts against the upper cover, and the second side of the first cylinder abuts against the bottom plate.

7. The mounting assembly according to claim 5 or 6, characterized in that: The box is used to accommodate a cylindrical battery core, and the diameter of the first cylinder is equal to the diameter of the cylindrical battery core.

8. The mounting assembly according to any one of claims 1 to 6, characterized in that: A first through hole is provided inside the first sleeve, a second through hole is provided inside the second sleeve, and the first through hole and the second through hole are connected; The mounting assembly further includes a mounting rod, and the mounting rod is passed through the first through hole and the second through hole; The first end of the mounting rod extends out of the first sleeve, and the second end of the mounting rod extends out of the second sleeve; The first end of the mounting rod and the second end of the mounting rod are respectively connected to the new energy equipment.

9. A battery pack, characterized in that: The battery pack includes a box body and battery cells housed inside the box body, and the battery pack box body is provided with a mounting assembly as described in any one of claims 1 to 8.

10. The battery pack according to claim 9, characterized in that: Dummy cells are provided around the mounting component.

11. The battery pack according to claim 9, characterized in that: The battery pack further includes a thermal management component, and the mounting component and the thermal management component are connected via a first reinforcement member.

12. The battery pack according to claim 9 or 11, characterized in that: The battery pack further includes a support assembly, and the mounting assembly and the support assembly are connected via a second reinforcement member.

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