Battery case and battery device

Abstract

The application discloses a battery box and a battery device. The battery box comprises a frame, a liquid cooling plate, a bottom plate and a sealing assembly. The liquid cooling plate is connected with the frame and cooperates with the frame to define a containing space for containing a battery cell. The liquid cooling plate is provided with a mounting hole penetrating through the liquid cooling plate. The bottom plate is located on a side of the liquid cooling plate away from the containing space, is sealingly connected with the frame and cooperates with the liquid cooling plate to define a sealed space. The sealing assembly is used for sealing the mounting hole and comprises a fastener and a sealing member. The sealing member is arranged in the mounting hole, and the fastener is detachably arranged in the sealing member. When it is necessary to detect the air tightness of the sealed space, the fastener is detached to make the containing space and the sealed space communicate through the mounting hole.

Description

Technical Field

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

[0002] Currently, battery packs typically have a double-layer sealing structure at the bottom. This double-layer sealing structure means that the battery pack casing includes a frame, and a liquid cooling plate and a bottom plate sequentially arranged at the bottom of the frame. The liquid cooling plate is sealed to the frame to form the first layer of sealing, and the bottom plate covers the liquid cooling plate and is sealed to the frame to form the second layer of sealing. When performing airtightness testing on the battery pack casing, related technologies can only test the airtightness of the first layer of sealing, making it difficult to test the airtightness of the second layer. Utility Model Content

[0003] This application provides a battery housing and a battery device.

[0004] The battery casing of this application includes a frame, a liquid cooling plate, a base plate, and a sealing assembly. The liquid cooling plate is connected to the frame and together with the frame defines an accommodating space for accommodating battery cells. The liquid cooling plate has mounting holes that penetrate the liquid cooling plate. The base plate is located on the side of the liquid cooling plate away from the accommodating space. The base plate is sealed to the frame and together with the liquid cooling plate defines a sealed space. The sealing assembly is used to seal the mounting holes. The sealing assembly includes fasteners and seals. The seals are disposed in the mounting holes, and the fasteners are detachably inserted through the seals. The fasteners are configured such that, when it is necessary to test the airtightness of the sealed space, the accommodating space and the sealed space can be connected through the mounting holes by removing the fasteners.

[0005] The battery housing of this application embodiment is sealed by fasteners and sealing elements in the mounting holes. When the housing space is tested, the mounting holes are sealed. Then, when the sealing performance of the housing space is verified to be good, the fasteners are removed and the base plate is installed, so that the housing space and the sealed space are connected through the mounting holes. This allows the sealing performance of the sealed space to be tested. The operation is convenient and non-destructive testing can be achieved, which is beneficial for after-sales maintenance.

[0006] In some embodiments, the fastener includes a columnar portion and an end head, the columnar portion passing through and threadedly connected to the seal, and the end head protruding outside the mounting hole.

[0007] In this way, the columnar part is tightly connected to the seal and the liquid cooling plate, resulting in good sealing performance.

[0008] In some embodiments, the end head includes a first fastening section and a second fastening section, the first fastening section including a stepped surface, and the second fastening section located between the first fastening section and the columnar portion; the stepped surface extends radially outward from the periphery of the second fastening section; the sealing assembly also includes a sealing gasket disposed between the stepped surface and the liquid cooling plate.

[0009] Thus, by extending radially outward from the periphery of the second fastening section, a sealing gasket is placed between the step surface and the liquid cooling plate, thereby ensuring a good seal between the fastener and the liquid cooling plate and preventing it from loosening.

[0010] In some embodiments, the end face of the seal facing the end head is higher than the same-side surface of the liquid cooling plate, and the end head abuts against the seal; or, The end face of the seal facing the end head is flush with the same side surface of the liquid cooling plate, and the end head abuts against the seal. The liquid cooling plate abuts against the end head when the radial edge of the end head extends beyond the edge of the mounting hole; or... The end face of the seal facing the head is lower than the same side surface of the liquid cooling plate, and the head abuts against the liquid cooling plate.

[0011] In this way, the end head can abut against the seal and / or liquid cooling plate, so that the fastener forms a hard connection with the seal and / or liquid cooling plate, thereby ensuring that the fastener is not easy to loosen in the mounting hole.

[0012] In some embodiments, the seal includes a first connecting section and a second connecting section, the second connecting section being axially away from the end head relative to the first connecting section, the outer diameter of the second connecting section being larger than the outer diameter of the first connecting section, the wall of the mounting hole being formed with a break surface, and the second connecting section abutting against the break surface.

[0013] Thus, by having the outer diameter of the second connecting section larger than that of the first connecting section, and the second connecting end abutting against the discontinuity surface of the mounting hole wall, the connection strength between the seal and the mounting hole, and between the fastener and the seal, is improved.

[0014] In some implementations, the seal is a press-fit nut or a pull-fit nut, and the fastener is a bolt.

[0015] This makes it easy to assemble and disassemble fasteners and seals during testing.

[0016] In some embodiments, the liquid cooling plate has flow channels for the flow of coolant, and the mounting holes are arranged to avoid the flow channels.

[0017] In this way, the mounting holes are positioned to avoid the flow channels, ensuring smooth flow of coolant and eliminating the risk of leakage.

[0018] In some implementations, a liquid cooling plate is used to bond the battery cell and dissipate heat from the battery cell, and mounting holes are located outside the area where the liquid cooling plate bonds with the battery cell.

[0019] This avoids structural interference, facilitates the disassembly and assembly of fasteners, and reduces the impact of airtightness testing on cell heat dissipation and structural stability.

[0020] In some embodiments, the liquid cooling plate includes a first liquid cooling plate and a second liquid cooling plate stacked on top of each other, the liquid cooling plate having a sealing weld around a mounting hole, the sealing weld being used to partially connect the first liquid cooling plate and the second liquid cooling plate and cut off the flow channels in the first liquid cooling plate and the second liquid cooling plate.

[0021] In this way, by sealing the weld around the mounting hole and cutting off the flow channels in the first and second liquid cooling plates, coolant leakage from the mounting hole is prevented.

[0022] In some embodiments, the battery housing also includes an end cap; the frame includes a plurality of interconnected side plates, the end cap and the liquid cooling plate are disposed opposite each other at both ends of the plurality of side plates along the height direction of the battery housing, and the end cap, side plates and liquid cooling plate together define the accommodating space.

[0023] In this way, a closed containment space can be formed to isolate the battery cells within the containment space.

[0024] In some embodiments, the base plate covers the liquid cooling plate and at least a portion of the base plate is spaced apart from the liquid cooling plate along the height direction, and the interval between the base plate and the liquid cooling plate along the height direction forms a sealed space.

[0025] In this way, the base plate can protect the liquid cooling plate and enable the battery box to achieve double sealing under limited height.

[0026] A battery device includes a battery housing according to any of the above embodiments, and battery cells disposed within the battery housing.

[0027] Thus, the battery device according to the present application has all the beneficial effects of the above-described embodiments.

[0028] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0029] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein: Figure 1 This is a three-dimensional structural diagram of the battery box according to an embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the battery box along the AA direction; Figure 3 yes Figure 2 An enlarged schematic diagram of the battery compartment in section B; Figure 4 This is an isometric cross-sectional view of a battery housing according to another embodiment of this application; Figure 5 yes Figure 4 An enlarged schematic diagram of the battery box in section C.

[0030] Explanation of reference numerals in the attached figures: 100-Battery housing, 10-Frame, 11-Side panel, 20-Liquid cooling plate, 21-Accommodation space, 22-Mounting hole, 221-Separation surface, 23-First liquid cooling plate, 24-Second liquid cooling plate, 25-Sealing weld, 30-Base plate, 31-Sealing space, 40-Sealing assembly, 41-Fastener, 411-Columnar part, 412-End head, 4121-First fastening section, 4122-Second fastening section, 4123-Step surface, 42-Sealing element, 421-First connecting section, 422-Second connecting section, 43-Sealing gasket. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0036] Please see Figures 1-3 The battery housing 100 of this application includes a frame 10, a liquid cooling plate 20, a bottom plate 30, and a sealing assembly 40. The liquid cooling plate 20 is connected to the frame 10 and together with the frame 10 defines an accommodating space 21 for accommodating battery cells (not shown). The liquid cooling plate 20 has a mounting hole 22 that penetrates the liquid cooling plate 20. The bottom plate 30 is located on the side of the liquid cooling plate 20 away from the accommodating space 21. The bottom plate 30 is sealed to the frame 10 and together with the liquid cooling plate 20 defines a sealed space 31. The sealing assembly 40 is used to seal the mounting hole 22. The sealing assembly 40 includes a fastener 41 and a seal 42. The seal 42 is disposed in the mounting hole 22, and the fastener 41 is detachably inserted through the seal 42. The fastener 41 is configured such that when it is necessary to test the airtightness of the sealed space 31, the accommodating space 21 and the sealed space 31 can be connected through the mounting hole 22 by disassembling the fastener 41.

[0037] The battery housing 100 of this application embodiment is sealed by fastener 41 and sealing element 42 in mounting hole 22. When testing the accommodating space 21, the mounting hole 22 is sealed. Then, when the sealing performance of the accommodating space 21 is verified to be good, the fastener 41 is removed and the base plate 30 is installed, so that the accommodating space 21 and the sealed space 31 are connected through the mounting hole 22. This allows the sealing performance of the sealed space 31 to be tested. The operation is convenient and non-destructive testing can be achieved, which is beneficial to after-sales maintenance.

[0038] Specifically, the battery housing 100 has a hollow structure, and the frame 10, together with the base plate 30 and / or the liquid cooling plate 20, can form various shapes such as a cuboid, cube, or cylinder. The liquid cooling plate 20 and the base plate 30 are stacked on the bottom of the battery housing 100. The edges of the liquid cooling plate 20 and the edges of the base plate 30 are tightly connected to the frame 10. The base plate 30 has a slope from the edge to the center, so that the middle part of the base plate 30 and the liquid cooling plate 20 are spaced apart along the stacking direction, and the space between them forms a sealed space 31.

[0039] When the base plate 30 and the frame 10 are sealed together, the sealing assembly 40 achieves airtight isolation between the receiving space 21 and the sealed space 31 through the sealing connection of the fastener 41 and the seal 42, and achieves air communication between the receiving space 21 and the sealed space 31 through the separation of the fastener 41 and the seal 42.

[0040] The base plate 30 may be made of the same or different material as the frame 10. For example, the base plate 30 and the frame 10 may both be made of aluminum or aluminum alloy, engineering plastics, etc.

[0041] like Figure 3 As shown, in the scenario where the battery cell is transferred into the battery box 100 and the encapsulation is completed, the fastener 41 and the seal 42 are sealed together and the mounting hole 22 is blocked. At the same time, the base plate 30 is fixedly installed on the frame 10, and the accommodating space 21 and the sealing space 31 are isolated by the liquid cooling plate 20.

[0042] Please see Figures 3-5 , Figure 4 and Figure 5 This is an isometric cross-sectional view of the battery housing 100 with the fastener 41 and seal 42 separated. The connection between the fastener 41 and seal 42, and the connection between the base plate 30 and frame 10, are adapted to the needs of the airtightness test of the battery housing 100.

[0043] The battery housing 100 can perform two tests on the housing space 21 and the sealed space 31 respectively. First, the airtightness of the housing space 21 is tested separately, that is, whether the liquid cooling plate 20 seals the housing space 21 well. During this test, the base plate 30 is separated from the frame 10, and the fastener 41 is sealed to the seal 42.

[0044] Then, the airtightness of the sealed space 31 is tested, that is, the seal between the base plate 30 and the liquid cooling plate 20 is tested to see if it is good. During this test, the base plate 30 is sealed to the frame 10, and the fastener 41 is separated from the seal 42. The fastener 41 can be removed from the mounting hole 22. It should be noted that during the above two tests, other through holes or grooves penetrating the wall on the frame 10 need to be sealed. The above two airtightness tests can be performed using existing battery box 100 airtightness testing fixtures, reducing design costs and application barriers.

[0045] Please see Figure 3 In some embodiments, the fastener 41 includes a columnar portion 411 and an end head 412. The columnar portion 411 passes through the seal 42 and is threadedly connected to the seal 42, while the end head 412 abuts against the liquid cooling plate 20 and protrudes outside the mounting hole 22. In this way, the columnar portion 411 is tightly connected to the seal 42 and the liquid cooling plate 20, resulting in good sealing performance.

[0046] Specifically, the outer peripheral surface of the columnar portion 411 is threaded, and the seal 42 can be fixedly disposed on the wall of the mounting hole 22. The seal 42 has a sleeve-like structure, and the inner surface of the seal 42 is threaded to match the columnar portion 411. For example, the fastener 41 is a bolt, the end head 412 is a bolt head, and the seal 42 can be a nut.

[0047] Please see Figure 3 In some embodiments, the end head 412 includes a first fastening section 4121 and a second fastening section 4122, the second fastening section 4122 being located between the first fastening section 4121 and the columnar portion 411; the first fastening section 4121 includes a stepped surface 4123 extending radially outward from the periphery of the second fastening section 4122; the sealing assembly 40 also includes a sealing gasket 43, the sealing gasket 43 being disposed between the stepped surface 4123 and the liquid cooling plate 20.

[0048] Thus, the step surface 4123 extends radially outward from the periphery of the second fastening section 4122, and the sealing gasket 43 is placed between the step surface 4123 and the liquid cooling plate 20, thereby ensuring a good seal between the fastener 41 and the liquid cooling plate 20 and preventing it from loosening.

[0049] Specifically, the radial dimension of the first fastening section 4121 is larger than the radial dimension of the second fastening section 4122. The sealing gasket 43 can be a sealing ring, gasket, etc., and the sealing gasket 43 has a certain degree of flexibility. The sealing element 42 can be made of materials such as silicone or rubber. For example, the sealing gasket 43 is annular and is fitted over the second fastening section 4122 and / or the columnar portion 411. The upper and lower surfaces of the sealing gasket 43 abut against the stepped surface 4123 of the first fastening section 4121 and the liquid cooling plate 20, respectively.

[0050] In some embodiments, the end face of the seal 42 facing the end head 412 is higher than the same-side surface of the liquid cooling plate 20, and the end head 412 abuts against the seal 42; or, The end face of the seal 42 facing the end head 412 is flush with the same side surface of the liquid cooling plate 20. The end head 412 abuts against the seal 42. The liquid cooling plate 20 abuts against the end head 412 when the radial edge of the end head 412 extends beyond the edge of the mounting hole 22; or, The end face of the seal 42 facing the end head 412 is lower than the same side surface of the liquid cooling plate 20, and the end head 412 abuts against the liquid cooling plate 20.

[0051] Thus, the end head 412 can abut against the seal 42 and / or the liquid cooling plate 20, so that the fastener 41 forms a hard connection with the seal 42 and / or the liquid cooling plate 20, thereby ensuring that the fastener 41 is not easy to loosen in the mounting hole 22.

[0052] Specifically, the "same-side surface of liquid cooling plate 20" refers to the side surface of liquid cooling plate 20 that also faces the end head.

[0053] When the end face of the seal 42 facing the head 412 is higher than the same side surface of the liquid cooling plate 20, the second fastening section 4122 abuts against the seal 42 and may not contact the liquid cooling plate 20.

[0054] When the end face of the seal 42 facing the head 412 is flush with the same side surface of the liquid cooling plate 20, the edge of the second fastening section 4122 extends radially beyond the edge of the mounting hole 22 and also beyond the end face of the seal 42. The second fastening section 4122 simultaneously abuts against both the seal 42 and the liquid cooling plate 20.

[0055] When the end face of the seal 42 facing the head 412 is lower than the same side surface of the liquid cooling plate 20, the second fastening section 4122 abuts against the liquid cooling plate 20 and may not contact the seal 42.

[0056] Please see Figure 3 In some embodiments, the seal 42 includes a first connecting segment 421 and a second connecting segment 422, the second connecting segment 422 being axially away from the end head 412 relative to the first connecting segment 421, the outer diameter of the second connecting segment 422 being larger than the outer diameter of the first connecting segment 421, the wall of the mounting hole 22 being formed with a break surface 221, and the second connecting segment 422 abutting against the break surface 221.

[0057] Thus, by having the outer diameter of the second connecting section 422 larger than the outer diameter of the first connecting section 421, and the second connecting end abutting the discontinuity surface 221 of the mounting hole 22 wall, the connection strength between the seal 42 and the mounting hole 22, and between the fastener 41 and the seal 42, is improved.

[0058] Specifically, the longitudinal profile of the seal 42 can be approximated as an inverted "T" shape. Since the second connecting end abuts against the break surface 221 relative to the first connecting end head 412, the seal 42 is not easily dislodged from the mounting hole 22 along with the fastener 41 when it is removed from the mounting hole 22 in the direction from the second connecting end to the first connecting end.

[0059] Please see Figure 3 In some embodiments, the seal 42 is a press-fit nut or a pull-fit nut, and the fastener 41 is a bolt. This makes it easy to assemble and disassemble the fastener 41 and the seal 42 during testing.

[0060] In this embodiment, the fastener 41 and the seal 42 are threaded together. A flexible sealing gasket 43 is placed between the end 412 of the fastener 41 and the liquid cooling plate 20. This can control the screwing stroke of the fastener 41. The sealing gasket 43 is compressed and the amount of compression is within a reasonable range, which further ensures that the bolt is not easily loosened.

[0061] Please see Figure 3 and Figure 5 In some embodiments, the liquid cooling plate 20 has a flow channel (not shown) for the flow of coolant, and the mounting hole 22 is positioned to avoid the flow channel. This arrangement ensures smooth coolant flow and eliminates the risk of leakage.

[0062] Specifically, the liquid cooling plate 20 is attached to the battery cell placed in the receiving space 21, and the flow channel is arranged in the area where the liquid cooling plate 20 is attached to the battery cell. Therefore, the mounting hole 22 is also misaligned with the battery cell, which is beneficial for after-sales non-destructive testing.

[0063] In some embodiments, the liquid cooling plate 20 is used to bond the battery cell (not shown) and dissipate heat from the battery cell, and the mounting hole 22 is located outside the area where the liquid cooling plate 20 is bonded to the battery cell. In this way, structural interference can be avoided, fasteners 41 can be easily installed and removed, and the impact of airtightness testing on battery cell heat dissipation and structural stability can be reduced.

[0064] Specifically, the side surface of the liquid cooling plate 20 facing the receiving space 21 along its thickness direction is at least partially in contact with the battery cell. The side surface of the liquid cooling plate 20 facing away from the receiving space along its thickness direction, together with the base plate, forms a sealed space 31. The mounting hole 22 can penetrate the liquid cooling plate 20 in a direction that forms an angle with both sides of the liquid cooling plate 20; for example, the mounting hole 22 penetrates the liquid cooling plate 20 along its thickness direction. The opening formed by the mounting hole 22 penetrating the side surface of the liquid cooling plate 20 facing the receiving space 21 is located in the area of ​​the liquid cooling plate 20 that is not in contact with the battery cell.

[0065] As is easily understood, the liquid cooling plate 20 regulates the temperature of the battery cell through the circulation and heat exchange of coolant in the flow channels. Depending on the density of the flow channel distribution, the area where the liquid cooling plate 20 is in contact with the battery cell can be partially or entirely covered by flow channels, while some flow channels can also be located outside the area where the liquid cooling plate 20 is in contact with the battery cell. The mounting hole 22 can be designed to avoid both the flow channels and the area where the liquid cooling plate 20 is in contact with the battery cell.

[0066] Please see Figure 3 and Figure 5 In some embodiments, the liquid cooling plate 20 includes a first liquid cooling plate 23 and a second liquid cooling plate 24 stacked on top of each other. The liquid cooling plate 20 is provided with a sealing weld 25 surrounding the mounting hole 22. The sealing weld 25 is used to partially connect the first liquid cooling plate 23 and the second liquid cooling plate 24 and cut off the flow channels in the first liquid cooling plate 23 and the second liquid cooling plate 24.

[0067] Thus, by sealing the weld bead 25 around the mounting hole 22 and cutting off the flow channels in the first liquid cooling plate 23 and the second liquid cooling plate 24, coolant leakage from the mounting hole 22 is prevented.

[0068] Specifically, the sealing weld 25 can be sealed using friction stir welding. The sealing weld 25 can be a closed ring, and further, the center of the sealing weld 25 can be located on the same axis as the center of the mounting hole 22. The first liquid cooling plate 23 and the second liquid cooling plate 24 are welded together at the sealing weld 25.

[0069] Please see Figure 1 and Figure 3 In some embodiments, the battery housing also includes an end cap (not shown); the frame 10 includes multiple interconnected side plates 11, and the end cap and liquid cooling plate 20 are disposed opposite each other at both ends of the multiple side plates 11 along the height direction of the battery housing 100. The end cap, side plates 11, and liquid cooling plate 20 together define an accommodating space 21. In this way, a closed accommodating space 21 can be formed to isolate the battery cells in the accommodating space 21.

[0070] Specifically, the height direction of the battery housing 100 is parallel to the thickness direction of the liquid cooling plate 20, that is, parallel to the thickness direction of the bottom plate 30. The end cap and the liquid cooling plate 20 each form the top and bottom surfaces of the receiving space 21. Multiple side plates 11 can be approximately parallel to the height direction of the battery housing 100 and connected end to end in sequence to form the side of the receiving space 21.

[0071] Please see Figure 1 and Figure 3In some embodiments, the base plate 30 covers the liquid cooling plate 20, and at least a portion of the base plate 30 and the liquid cooling plate 20 are spaced apart along the height direction, with the spaced interval between the base plate 30 and the liquid cooling plate 20 forming a sealed space 31. In this way, the base plate 30 can protect the liquid cooling plate 20 and enable the battery housing 100 to achieve a double-layer seal under limited height conditions.

[0072] Optionally, a sealing strip may be provided between the base plate 30 and the frame 10. After the battery box 100 has been used for a period of time, the sealing strip may age or be damaged. By testing the sealing performance of the sealing space 31 separately, it can be determined whether the sealing strip has failed and whether it needs to be replaced.

[0073] Optionally, only one sealing assembly 40 is provided in the battery housing 100, and the mounting hole 22 is close to the edge of the liquid cooling plate 20. That is, the sealing assembly 40 is closer to the side plate 11 than the center of the liquid cooling plate 20.

[0074] The battery device (not shown) according to the embodiments of this application includes the battery housing 100 of any of the above embodiments and the battery cells disposed in the battery housing 100.

[0075] Thus, the battery device according to the present application has all the beneficial effects of the above-described embodiments.

[0076] Specifically, the battery device can be a battery pack, and the battery device may include one or more battery housings 100, each of which can accommodate multiple battery cells connected in series or in parallel.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery housing, characterized in that, include: frame; A liquid cooling plate is connected to the frame and together with the frame defines an accommodating space for accommodating battery cells. The liquid cooling plate has mounting holes that penetrate the liquid cooling plate. The base plate is located on the side of the liquid cooling plate away from the receiving space. The base plate is sealed to the frame and together with the liquid cooling plate defines a sealed space. and, A sealing assembly for sealing the mounting hole; the sealing assembly includes a fastener and a seal, the seal being disposed in the mounting hole, and the fastener being detachably inserted through the seal; The fastener is configured such that, when it is necessary to test the airtightness of the sealed space, the receiving space and the sealed space can be connected through the mounting hole by disassembling the fastener.

2. The battery housing according to claim 1, characterized in that, The fastener includes a columnar portion and an end head, the columnar portion passing through the seal and threadedly connected to the seal, and the end head protruding outside the mounting hole.

3. The battery housing according to claim 2, characterized in that, The end head includes a first fastening section and a second fastening section, the second fastening section being located between the first fastening section and the columnar portion; the first fastening section includes a stepped surface, the stepped surface extending radially outward from the periphery of the second fastening section; The sealing assembly also includes a sealing gasket, which is disposed between the stepped surface and the liquid cooling plate.

4. The battery housing according to claim 2, characterized in that, The end face of the seal facing the end head is higher than the same side surface of the liquid cooling plate, and the end head abuts against the seal. or, The end face of the seal facing the end head is flush with the same side surface of the liquid cooling plate. The end head abuts against the seal. The liquid cooling plate abuts against the end head when the radial edge of the end head extends beyond the edge of the mounting hole. or, The end face of the seal facing the head is lower than the same side surface of the liquid cooling plate, and the head abuts against the liquid cooling plate.

5. The battery housing according to claim 2, characterized in that, The sealing element includes a first connecting section and a second connecting section. The second connecting section is axially away from the end head relative to the first connecting section. The outer diameter of the second connecting section is larger than the outer diameter of the first connecting section. The wall of the mounting hole is formed with a break surface, and the second connecting section abuts against the break surface.

6. The battery housing according to claim 2, characterized in that, The sealing element is a press-fit nut or a pull-fit nut, and the fastener is a bolt.

7. The battery housing according to claim 1, characterized in that, The liquid cooling plate has a flow channel for the flow of coolant, and the mounting hole is set away from the flow channel.

8. The battery housing according to claim 1, characterized in that, The liquid cooling plate is used to attach to the battery cell and dissipate heat from the battery cell, and the mounting holes are located outside the area where the liquid cooling plate and the battery cell are attached.

9. The battery housing according to claim 7, characterized in that, The liquid cooling plate includes a first liquid cooling plate and a second liquid cooling plate stacked on top of each other. The liquid cooling plate is provided with a sealing weld around the mounting hole. The sealing weld is used to partially connect the first liquid cooling plate and the second liquid cooling plate and cut off the flow channel in the first liquid cooling plate and the second liquid cooling plate.

10. The battery housing according to claim 1, characterized in that, The battery housing also includes end caps; The frame includes multiple interconnected side plates. The end cap and the liquid cooling plate are disposed opposite to each other at both ends of the multiple side plates along the height direction of the battery box. The end cap, the side plates and the liquid cooling plate together define the accommodating space.

11. The battery housing according to claim 10, characterized in that, The base plate covers the liquid cooling plate, and at least a portion of the base plate and the liquid cooling plate are spaced apart along the height direction, the interval between the base plate and the liquid cooling plate along the height direction forming the sealed space.

12. A battery device, characterized in that, It includes the battery housing as described in any one of claims 1-11, and the battery cells disposed within the battery housing.

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