Battery box, battery pack, and vehicle

Abstract

A battery box, a battery pack, and a vehicle are provided. The battery box includes a tray that supports battery cells and a sealing cover that covers the top of the tray. The tray includes a first plate body, and first support plates are disposed on both ends of the first plate body in the extension direction of the battery cells, and at least a portion of the protrusion of the first support plate toward the first plate body covers the end regions of the battery cells. The sealing cover includes a second plate body, and first reinforcing plates are disposed on both ends of the second plate body in the extension direction of the battery cells, and at least a portion of the protrusion of the first reinforcing plate toward the second plate body covers the end regions of the battery cells.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to Chinese Patent Application No. 202310233732.4, entitled "Battery Box, Battery Pack and Vehicle," filed with the State Intellectual Property Office of China on February 28, 2023, the entire contents of which are incorporated herein by reference.

[0002] Technical Field The present disclosure relates to the field of vehicle technology, and in particular to battery boxes, battery packs, and vehicles. [Background technology]

[0003] Power batteries are a core component of new energy vehicles, and whether a power battery has sufficient structural strength has a significant impact on driving safety. For example, if the battery housing cannot effectively support the internal battery cells due to design defects, the stability of the battery cells during operation will be affected, and poor contact will affect the power supply effect and even lead to safety accidents. Summary of the Invention [Means for solving the problem]

[0004] To solve the problems of the prior art, the present disclosure provides a battery box, a battery pack, and a vehicle.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a battery box, the battery box comprising: a tray for supporting the battery cells, the tray including a first plate body, the first support plate being disposed at both ends of the first plate body in an extension direction of the battery cells, and at least a part of a protrusion of the first support plate onto the first plate body covering an end region of the battery cells; and a sealing cover that covers the top of the tray, the sealing cover including a second plate body, a first reinforcing plate being disposed at both ends of the second plate body in the extension direction of the battery cells, and at least a portion of the protrusion of the first reinforcing plate onto the second plate body covering the end region of the battery cells.

[0006] According to an embodiment of the present disclosure, the tray further includes at least one intermediate beam, the intermediate beam being disposed between both ends of the first plate in the extension direction of the battery cells, the second support plate being disposed at a position corresponding to the intermediate beam of the first plate, and at least a portion of a protrusion of the second support plate toward the first plate covering an end region of the battery cells that is close to the intermediate beam.

[0007] The sealing cover further includes a second reinforcing plate, the second reinforcing plate being arranged at a position corresponding to the intermediate beam of the second plate body, and at least a portion of the protrusion of the second reinforcing plate onto the second plate body covering an end region of the battery cell that is close to the intermediate beam.

[0008] According to one embodiment of the present application, the first support plate includes a first support portion, and a protrusion of the first support portion onto the first plate body covers an end region of the battery cell, and the length of the first support portion in the extension direction of the battery cell occupies 1 / 3 to 2 / 3 of the entire first support plate, and / or The first reinforcing plate includes a first reinforcing portion, the protruding portion of the first reinforcing portion toward the second plate body covers the end region of the battery cell, and the length of the first reinforcing portion in the extension direction of the battery cell accounts for 1 / 3 to 2 / 3 of the entire first reinforcing plate.

[0009] According to one embodiment of the present disclosure, the second support plate includes a second support portion, and a protrusion of the second support portion onto the first plate body covers an end region of the battery cell that is close to the intermediate beam, and the length of the second support portion in the extension direction of the battery cell is equal to the length of the first support portion in the extension direction of the battery cell; and / or The second reinforcing plate includes a second reinforcing portion, and the protrusion of the second reinforcing portion onto the second plate body covers an end region of the battery cell that is close to the intermediate beam, and the length of the second reinforcing portion in the extension direction of the battery cell is equal to the length of the first reinforcing portion in the extension direction of the battery cell.

[0010] According to one embodiment of the present disclosure, the protrusion of the first support portion onto the first plate body at least partially overlaps with the protrusion of the first reinforcing portion onto the second plate body, and the protrusion of the second support portion onto the first plate body at least partially overlaps with the protrusion of the second reinforcing portion onto the second plate body.

[0011] According to an embodiment of the present disclosure, the length of the first support plate in the extension direction of the battery cells is equal to half the length of the second support plate in the extension direction of the battery cells; and / or The length of the first reinforcing plate in the extension direction of the battery cells is equal to half the length of the second reinforcing plate in the extension direction of the battery cells.

[0012] According to one embodiment of the present disclosure, the first plate body is a cooling plate, and the first plate body includes a flat plate and a corrugated plate assembled together to form a dielectric channel therein, and both ends of the corrugated plate are configured as flat portions configured to be fixedly connected to the flat plate, and the cross section of the first support plate in the extension direction of the battery cell is configured to be stepped, and the first support plate has a support body and a protrusion protruding outward from the support body, and the protrusion is configured to be supported on the surface of the flat portion.

[0013] According to one embodiment of the present disclosure, a cavity structure is formed inside the first support plate, and a plurality of reinforcing ribs are arranged at intervals in the extension direction of the battery cells.

[0014] According to one embodiment of the present disclosure, the first support plate is provided with a notch configured to avoid the joint of the cooling plate.

[0015] According to one embodiment of the present disclosure, a plurality of studs are arranged at positions corresponding to the second support plate of the first plate body, the plurality of studs are arranged at intervals in the extension direction of the second support plate, the second support plate is provided with through holes for the studs to pass through, and the studs passing through the through holes are connected to stud sleeves to detachably position the second support plate on the first plate body.

[0016] According to one embodiment of the present disclosure, the through-hole is a countersunk hole.

[0017] According to one embodiment of the present disclosure, the tray further includes a front beam and a rear beam, the front beam and the rear beam being respectively disposed at both ends of the first plate body in the extension direction of the battery cells, at least one of the front beam and the rear beam having a chamber configured to accommodate an electrical component, and a protrusion of the first support plate onto the first plate body covering at least a portion of the chamber.

[0018] According to one embodiment of the present disclosure, the chamber includes a first chamber disposed on the front beam and configured to accommodate a power distribution box, with the low-voltage plug-in mounting hole and the high-voltage plug-in mounting hole being disposed on either side of the first chamber, respectively; and / or the chamber includes a second chamber disposed on the rear beam and configured to accommodate a fuse and a relay, with the fuse configured to connect the plurality of battery cells in series.

[0019] According to one embodiment of the present disclosure, the front beam and / or the rear beam further include side sealing covers that seal the chamber, the side sealing covers being detachably disposed on the front beam and / or the rear beam, and a sealing ring being further disposed between the side sealing covers and the front beam and / or the rear beam.

[0020] According to one embodiment of the present disclosure, explosion-proof valves are further disposed on both sides of the chamber.

[0021] According to one embodiment of the present disclosure, the sealing cover further includes a thermal insulation layer and a composite material layer, and the second plate body is disposed between the thermal insulation layer and the composite material layer.

[0022] According to a second aspect of an embodiment of the present disclosure, there is provided a battery pack including a battery cell and a battery box according to any one of the aforementioned implementations.

[0023] According to a third aspect of an embodiment of the present disclosure, there is provided a vehicle including the aforementioned battery pack.

[0024] The technical solution provided in the embodiment of the present disclosure may include the beneficial effect that, in the battery box provided in the present disclosure, the first support plate is disposed at the maximum load-bearing position corresponding to the battery cell of the tray, i.e., the end region corresponding to the battery cell of the tray, and the first reinforcing plate is disposed in the region of the sealing cover corresponding to the end of the battery cell. In this way, structural reinforcement is formed both above and below the maximum load-bearing position of the battery cell, thereby improving the overall structural strength of the battery box and facilitating the improvement of operational safety.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to be restrictive of the present disclosure.

[0026] The accompanying drawings provide a further understanding of the present disclosure and are intended to constitute a part of this specification, and in conjunction with the following specific implementations, are used to explain the disclosure and are not intended to constitute limitations thereon. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 2 is an exploded perspective view showing the structure of a battery pack according to an exemplary embodiment. [Figure 2] FIG. 1 is a three-dimensional view of a battery box according to an exemplary embodiment. [Figure 3]1 is a three-dimensional view of a rear beam in accordance with an exemplary embodiment; [Figure 4] FIG. 3 is a top view of the battery box of FIG. 2. [Figure 5a] FIG. 3 is a side view of the battery box of FIG. 2. [Figure 5b] FIG. 5b is a partially enlarged view of part A in FIG. 5a. [Figure 5c] FIG. 5B is a partially enlarged view of part D in FIG. [Figure 5d] FIG. 5B is a partial enlarged view of part B in FIG. 5A. [Figure 5e] FIG. 5B is a partially enlarged view of part C in FIG. 5A. [Figure 6] FIG. 2 is a schematic diagram of a first support plate according to an exemplary embodiment. [Figure 7] 7 is a cross-sectional view of the first support plate of FIG. 6 in the extending direction of the battery cells. [Figure 8] FIG. 10 is a schematic diagram of a second support plate according to an exemplary embodiment. [Figure 9] 10 is a schematic diagram of a mounting structure for a second support plate according to an exemplary embodiment. [Figure 10] 1 is a schematic diagram of a sealing cover according to an exemplary embodiment. [Figure 11] 10 is a schematic diagram of another sealing cover according to an exemplary embodiment. [Figure 12a] FIG. 2 is a side view of a battery box according to an exemplary embodiment. [Figure 12b] FIG. 12B is a partially enlarged view of part E in FIG. 12A. [Figure 12c] FIG. 12B is a partially enlarged view of part G in FIG. 12A. [Figure 12d] FIG. 12b is a partially enlarged view of part F in FIG. 12a. [Figure 13] 1 is a schematic diagram of a vehicle in accordance with an exemplary embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0028] Exemplary embodiments are described in detail herein, and examples of the exemplary embodiments are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different accompanying drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure and as detailed in the appended claims.

[0029] Unless otherwise specified, positional terms used, such as "up, down, left, right," etc., are defined based on the directions shown in the corresponding drawings, and "inner" and "outer" refer to the inner and outer sides of the outline of the corresponding component. Furthermore, terms such as "first," "second," etc., used in this disclosure are intended to distinguish one element from another and do not imply any order or significance.

[0030] As shown in FIGS. 1 to 12d, one embodiment of the present disclosure provides a battery box 200. The battery box 200 includes a tray 1 that supports battery cells 3 and a sealing cover 2 that covers the top of the tray 1. The tray 1 includes a first plate 11. First support plates 16 are disposed on both ends of the first plate 11 in the extension direction of the battery cells 3, and at least a portion of the protruding portion of the first support plate 16 toward the first plate 11 covers the end region of the battery cells 3. The sealing cover 2 includes a second plate 21. First reinforcing plates 22 are disposed on both ends of the second plate 21 in the extension direction of the battery cells 3, and at least a portion of the protruding portion of the first reinforcing plate 22 toward the second plate 21 covers the end region of the battery cells 3. The extension direction of the battery cells 3 is the length direction of the battery cells 3.

[0031] The first plate body 11 is configured to support the battery cells 3 from the bottom, with a front beam 12 and a rear beam 13 disposed at both ends of the first plate body 11 in the extension direction of the battery cells 3, and side beams 15 disposed on both sides of the first plate body 11 in the extension direction of the battery cells 3. The front beam 12, the side beam 15, and the rear beam 13 are surrounded and assembled to form a space for accommodating the battery cells 3. The first support plate 16 can be disposed on the first plate body 11 by welding or other methods, and the first support plate 16 has the same extension direction as the front beam 12 and the rear beam 13. The first support plate 16 is integrally welded to the frame of the tray 1. Specifically, both ends of the first support plate 16 are welded to the side beams 15 of the tray 1, and side edges of the first support plate 16 are welded to the front beam 12 and the rear beam 13.

[0032] The end regions of the battery cells 3 are usually subjected to a relatively large load. Note that, in this specification, the end regions of the battery cells 3 extend inward from the end faces of the battery cells 3 by a distance of 20 mm to 50 mm. Furthermore, the fact that at least a portion of the protruding portion of the first support plate 16 toward the first plate body 11 covers the end regions of the battery cells 3 means that, in the extension direction of the battery cells 3, one end of the first support plate 16 extends to the bottoms of the front beam 12 and the rear beam 13, and the other end of the first support plate 16 extends at least partially to a position below the ends of the battery cells 3, thereby effectively supporting the ends of the battery cells 3.

[0033] The sealing cover 2 has a second plate 21, and first reinforcing plates 22 are arranged on both ends of the second plate 21 in the extension direction of the battery cells 3, and at least a portion of the protruding portion of the first reinforcing plate 22 onto the second plate 21 covers the end region of the battery cells 3. The second plate 21 is configured to protect the battery cells 3 from above and to form, together with the tray 1, an airtight space for accommodating the battery cells 3. The fact that at least a portion of the protruding portion of the first reinforcing plate 22 onto the second plate 21 covers the end region of the battery cells 3 means that one end of the first reinforcing plate 22 extends to the upper portions of the front beam 12 and the rear beam 13, and the other end of the first reinforcing plate 22 extends at least partially to a position above the ends of the battery cells 3, thereby effectively reinforcing the ends of the battery cells 3.

[0034] The technical solution provided in this embodiment of the present disclosure may include the beneficial effect that, in the battery box 200 provided in the present disclosure, the first support plate 16 is disposed at the maximum load-bearing position corresponding to the battery cells 3 of the tray 1, i.e., the end region corresponding to the battery cells 3 of the tray 1, and the first reinforcing plate 22 is disposed in the region corresponding to the end of the battery cells 3 of the sealing cover 2. In this way, by forming structural reinforcements on both the upper and lower sides of the maximum load-bearing position of the battery cells 3, the structural strength of the entire battery box is improved, and driving safety is facilitated to be improved.

[0035] At least one of the front beam 12 and the rear beam 13 is provided with a chamber 5 for accommodating electrical components, and the protrusion of the first support plate 16 onto the first plate body 11 covers at least a portion of the chamber 5. Specifically, as shown in FIGS. 1 and 2 , a first chamber 121 is disposed on the front beam 12. For the purpose of explanation, an example in which a distribution box 4 is accommodated is used. Because the first chamber 121 is disposed on the front beam 12, the distribution box 4 can be isolated from the battery cells 3. In this way, the battery cells 3 are not affected by the heat generated during operation of the distribution box 4. However, the presence of the first chamber 121 reduces the strength of the front beam 12. Therefore, the protrusion of the first support plate 16 onto the first plate body 11 can cover at least a portion of the first chamber 121, thereby compensating for the reduction in strength caused by the placement of the first chamber 121 and protecting the distribution box 4 accommodated in the first chamber 121.

[0036] The front beam 12 and / or the rear beam 13 further include a side sealing cover 6 configured to seal the chamber 5, and the side sealing cover 6 is detachably disposed on the front beam 12 and / or the rear beam 13. For example, the first chamber 121 may be fastened using a first side sealing cover 126 for sealing, and the first side sealing cover 126 can be detachably connected to the front beam 12 via fasteners such as bolts. To further improve sealing performance, a sealing ring 7 is further disposed between the side sealing cover 6 and the front beam 12 and / or the rear beam 13. For example, a first side sealing ring 122 is further disposed between the first side sealing cover 126 and the end face of the front beam. Furthermore, by further providing a low-voltage plug-in mounting hole 123 and a high-voltage plug-in mounting hole 124 in the front beam 12 and arranging the low-voltage plug-in mounting hole 123 and the high-voltage plug-in mounting hole 124 on both sides of the first chamber 121, the high-voltage wiring harness and the low-voltage wiring harness of the distribution box 4 can be pulled out from both sides, respectively, thereby preventing mutual interference between the high-voltage wiring harness and the low-voltage wiring harness. Furthermore, an explosion-proof valve 8 may be further provided on both sides of the chamber 5. For example, one first explosion-proof valve 125 is further provided on each side of the first chamber 121, which increases the speed of the thermal runaway reaction of the battery box and improves the safety of the battery box.

[0037] As shown in FIG. 3, a second chamber 131 is disposed in the rear beam 13. For the purpose of explanation, an example will be used in which a fuse and a relay are housed in the second chamber 131. The fuse is configured to connect multiple battery cells 3 in series, and the relay can be connected to a controller of the battery box. The controller controls the connection or disconnection of the relay. The controller controls the disconnection of the relay when an internal abnormality occurs in the battery box, such as an excessive temperature rise or an excessive voltage rise. When a problem such as a short circuit occurs in the battery box, the fuse can be disconnected to protect the battery box.

[0038] Similar to the first chamber 121, the presence of the second chamber 131 reduces the strength of the rear beam 13. Therefore, the protrusion of the first support plate 16 onto the first plate body 11 can cover at least a portion of the second chamber 131, thereby compensating for the reduction in strength caused by the second chamber 131 and protecting the fuses and relays housed in the second chamber 131.

[0039] The second chamber 131 may be fastened using a second side sealing cover for sealing, which can be detachably connected to the rear beam 13 via fasteners such as bolts. To further improve sealing performance, a second sealing ring 132 is further disposed between the second side sealing cover and the end face of the rear beam. In addition, one second explosion-proof valve 133 is further disposed on each side of the second chamber 131, which increases the speed of the thermal runaway reaction of the battery box and improves the safety of the battery box.

[0040] In some implementations, as shown in Figures 2 and 4, the tray 1 further includes at least one intermediate beam 14 disposed between both ends of the first plate body 11 in the extension direction of the battery cells 3. The intermediate beam 14 has the same extension direction as the front beam 12 and the rear beam 13. The bottom of the intermediate beam 14 is connected to the first plate body 11 by adhesive or other means, and both ends of the intermediate beam 14 are connected to two side beams 15 by welding or other means.

[0041] By disposing the intermediate beams 14, multiple storage spaces are formed in the tray 1. Thus, two sides of the intermediate beams 14 in the extension direction of the battery cells 3 are the end regions of the corresponding battery cells 3, and the battery cells 3 contacting the two sides of the intermediate beams 14 can be electrically connected using a connection structure such as a copper bus bar. The intermediate beams 14 function to isolate at least the battery cells 3 on both sides and reduce the rate of thermal runaway reactions in the battery box. To support some end regions of the battery cells 3, in some implementations, as shown in FIGS. 5a to 5e, a second support plate 17 is disposed on the first plate body 11 at a position corresponding to the intermediate beams 14, and at least a portion of the protrusion of the second support plate 17 onto the first plate body 11 covers the end regions of the battery cells 3 near the intermediate beams 14. For example, in the extension direction of the battery cell 3, the central region of the second support plate 17 is located at the bottom of the intermediate beam 14, and the two side surfaces of the second support plate 17 extend to a position below the end of the battery cell 3, effectively supporting the end of the battery cell 3.

[0042] 12a to 12d, the sealing cover 2 further includes a second reinforcing plate 23 disposed at a position corresponding to the middle beam 14 of the second plate body 21, and at least a portion of the protrusion of the second reinforcing plate 23 onto the second plate body 21 covers an end region of the battery cell 3 that is close to the middle beam 14. For example, in the extension direction of the battery cell 3, the central region of the second reinforcing plate 23 is located above the middle beam 14, and two side surfaces of the second reinforcing plate 23 extend to a position above the end of the battery cell 3, thereby effectively reinforcing the end of the battery cell 3.

[0043] In still some other implementations, the second support plate 17 is disposed at a position corresponding to the intermediate beam 14 of the first plate body 11, and at least a portion of the protrusion of the second support plate 17 into the first plate body 11 covers an end region of the battery cell 3 that is close to the intermediate beam 14. The sealing cover 2 further includes a second reinforcing plate 23 disposed at a position corresponding to the intermediate beam 14 of the second plate body 21, and at least a portion of the protrusion of the second reinforcing plate 23 into the second plate body 21 covers an end region of the battery cell 3 that is close to the intermediate beam 14.

[0044] In some embodiments, as shown in FIGS. 5a to 5e, the first support plate 16 includes a first support portion 162, or the first support plate 16 includes a first connection portion 161 and a first support portion 162. The protrusion of the first support portion 162 onto the first plate body 11 covers the end region of the battery cell 3. Specifically, the first connection portion 161 is configured to connect the first support plate 16 to the front beam 12 or the rear beam 13; that is, the first support portion 162 extends to a portion below the end region of the battery cell 3 to provide support. The lengths d11 and d12 of the first support portion 162 in the extension direction of the battery cell 3 account for 1 / 3 to 2 / 3 of the overall length d1 of the first support plate 16. For example, if the length d1 of the first support plate 16 in the extension direction of the battery cells 3 is 80 mm, the lengths d11, d12 of the first support portions 162 in the extension direction of the battery cells 3 are approximately 25 mm to 55 mm. The lengths d11, d12 of the first support portions 162 in the extension direction of the battery cells 3 can account for 1 / 3 to 2 / 3 of the overall length d1 of the first support plate 16, which ensures that the first support plate 16 has a sufficient support length for the battery cells 3 and further ensures the connection strength between the first support plate 16 and the front beam 12 or the rear beam 13.

[0045] In some other embodiments, as shown in FIGS. 12a to 12d, the first reinforcing plate 22 includes a first reinforcing portion 222, or includes a first extending portion 221 and a first reinforcing portion 222. The protruding portion of the first reinforcing portion 222 toward the second plate body 21 covers the end region of the battery cell 3. Specifically, the first extending portion 221 extends to the upper portions of the front beam 12 and the rear beam 13. That is, the first reinforcing portion 222 extends to a position above the end region of the battery cell 3, thereby providing reinforcement. The lengths d31 and d32 of the first reinforcing portion 222 in the extending direction of the battery cell 3 account for one-third to two-thirds of the overall length d3 of the first reinforcing plate 22 to ensure that the first support plate 16 has a sufficient reinforcing length for the battery cell 3.

[0046] In some other implementations, the lengths d11 and d12 of the first support portion 162 in the extension direction of the battery cells 3 occupy 1 / 3 to 2 / 3 of the overall length d1 of the first support plate 16, and the lengths d31 and d32 of the first reinforcing portion 222 in the extension direction of the battery cells 3 occupy 1 / 3 to 2 / 3 of the overall length d3 of the first reinforcing plate 22.

[0047] According to the implementations provided in the present disclosure, the protrusion of the first support portion 162 onto the first plate 11 at least partially overlaps with the protrusion of the first reinforcing portion 222 onto the second plate 21, and the protrusion of the second support portion 172 onto the first plate 11 at least partially overlaps with the protrusion of the second reinforcing portion 232 onto the second plate 21. In some implementations, the lengths d11 and d12 of the first support portion 162 in the extension direction of the battery cells 3 are equal to the lengths d31 and d32 of the first reinforcing portion 222 in the extension direction of the battery cells 3, i.e., the first support plate 16 and the first reinforcing plate 22 support / reinforce the battery cells 3 with the same size. The length d21 of the second support portion 172 in the extension direction of the battery cell 3 is equal to the length d41 of the second reinforcing portion 232 in the extension direction of the battery cell 3, that is, the second support plate 17 and the second reinforcing plate 23 support / reinforce the battery cell 3 with the same size. In this way, the battery cell 3 is subjected to uniform stress on both the upper and lower sides, further improving the stability of the battery box.

[0048] Furthermore, the length d1 of the first support plate 16 in the extension direction of the battery cells 3 can be equal to half the length d2 of the second support plate 17 in the extension direction of the battery cells 3, and / or the length d3 of the first reinforcing plate 22 in the extension direction of the battery cells 3 can be equal to half the length d4 of the second reinforcing plate 23 in the extension direction of the battery cells 3, which helps standardize the sizes of the support plates and reinforcing plates and improves the versatility of the support plates and reinforcing plates. Specifically, even in a battery box configured with different types of battery cells, there is no need to change the positions of the support plates and reinforcing plates to ensure the same support / reinforcement length at the ends of all battery cells 3.

[0049] According to an embodiment provided in the present disclosure, as shown in Fig. 5c, the first plate 11 may be configured as a cooling plate. In this case, the first plate 11 not only supports the battery cells 3, but also cools the battery cells 3 to ensure optimal operation of the battery. Specifically, the first plate 11 includes a flat plate 111 and a corrugated plate 112 that are assembled together to form a dielectric channel therein. Both ends of the corrugated plate 112 are configured as flat portions 1122 that are fixedly connected to the flat plate 111, that is, receiving cavities are formed at the ends of the first plate 11. 6 and 7, the cross section of the first support plate 16 in the extension direction of the battery cells 3 is configured in a stepped shape, and the first support plate 16 includes a support 1621 and a protruding portion 1611 that protrudes outward from the support 1621 and is supported on the surface of the flat portion 1122. That is, the accommodating cavity formed at the end of the first plate body 11 is filled with the protruding portion 1611, thereby improving the bonding between the first support plate 16 and the first plate body 11 and improving the supporting effect. Optionally, the first support plate 16 is provided with a notch 16211 configured to avoid the bonding portion of the cooling plate, and the arrangement position of the notch 16211 may be adaptively designed based on the actual position of the pipeline.

[0050] Furthermore, a cavity structure 164 is formed inside the first support plate 16, and a plurality of reinforcing ribs 163 are arranged in this cavity structure 164 at intervals in the extension direction of the battery cells 3. By forming the cavity structure 164 inside, the mass of the first support plate 16 can be reduced, thereby reducing the mass of the entire tray 1, thereby facilitating a lightweight design of the battery box. Moreover, the reinforcing ribs 163 are arranged to compensate for the reduction in structural strength caused by the cavity structure 164.

[0051] In some other embodiments, as shown in Figures 8 and 9, a plurality of studs 113 are arranged at intervals along the extension direction of the second support plate 17 at positions of the first plate body 11 corresponding to the second support plate 17, and the second support plate 17 has through-holes 173 for the studs 113 to pass through. The studs 113 passing through the through-holes 173 are connected to stud sleeves 174 to detachably position the second support plate 17 on the first plate body 11. Generally, the first support plate 16 is integrally welded to the frame of the tray 1 via its ends and sides, i.e., there are three welding positions to ensure connection strength. However, since the second support plate 17 is arranged at a middle position of the first plate body 11, only two ends of the second support plate 17 can be connected to the first plate body 11, specifically, they are integrally welded to the side beams 15. In this way, a screwing method can be used to compensate for the lack of connection strength that occurs when only both ends of the second support plate 17 can be connected to the first plate body 11.

[0052] Furthermore, the through holes 173 may be countersunk holes. In this way, the stud sleeves 174 can be sunk into the countersunk holes after installation, reducing the ground clearance of the battery box, thereby reducing the height of the battery box and facilitating the installation layout of the entire vehicle.

[0053] According to one embodiment of the present disclosure, as shown in FIGS. 10 and 11 , the sealing cover 2 can further include a thermal insulation layer 24 and a composite material layer 25, with the second plate 21 disposed between the thermal insulation layer 24 and the composite material layer 25. Specifically, the thermal insulation material can be ceramic wool, and the composite material can be epoxy resin and continuous glass fiber. The composite material layer 25 and the second plate 21 can be integrally manufactured by a method such as heat pressing. The thermal insulation layer 24 is bonded to the second plate 21 with an adhesive to form the sealing cover 2. The composite material layer 25 of the sealing cover 2 is fastened to the upper surface of the battery cell 3 with an adhesive. The composite material layer 25 contacts the battery cell 3 to provide excellent insulation performance that can withstand high temperatures. This ensures excellent insulation performance between the sealing cover 2 and the battery cell 3 in the event of a high temperature caused by thermal runaway. The composite material layer 25 also has relatively high strength.

[0054] According to a second aspect of the embodiment of the present disclosure, as shown in Fig. 1, there is provided a battery pack 100 including a battery cell 3 according to any one of the above-mentioned embodiments and a battery box 200, and the battery pack 100 has all the beneficial effects thereof. Details will not be described again here. The battery cell 3 is accommodated inside the battery box 200.

[0055] According to a third aspect of an embodiment of the present disclosure, as shown in Fig. 13, there is provided a vehicle 1000 including the above-mentioned battery pack 100, and has all the beneficial effects thereof, the details of which will not be described again here.

[0056] Above, the preferred embodiment of the present disclosure has been described in detail with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiment. Within the technical concept of the present disclosure, multiple simple modifications can be made to the technical solution of the present disclosure, and all of these simple modifications fall within the protection scope of the present disclosure.

[0057] Furthermore, it should be noted that the specific technical features described in the above specific implementation modes can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, various possible combination methods will not be specifically described in this disclosure.

[0058] In addition, various different implementation modes of the present disclosure may be combined in any manner, and such combinations shall also be considered as disclosed in the present disclosure, unless they are contrary to the concept of the present disclosure.

Claims

1. A battery box (100), A tray (1) for supporting battery cells (3), the tray (1) comprising a first plate body (11), first support plates (16) being arranged at both ends of the first plate body (11) in the extension direction of the battery cells (3), and at least a part of a protrusion of the first support plate (16) onto the first plate body (11) covering an end region of the battery cells (3); a sealing cover (2) covering an upper portion of the tray (1), the sealing cover (2) including a second plate (21), first reinforcing plates (22) disposed at both ends of the second plate (21) in the extension direction of the battery cells (3), and at least a portion of a protrusion of the first reinforcing plate (22) onto the second plate (21) covering the end region of the battery cells (3); Including the battery box.

2. The tray (1) further includes at least one intermediate beam (14), the intermediate beam (14) being disposed between both ends of the first plate body (11) in the extension direction of the battery cells (3), a second support plate (17) being disposed at a position of the first plate body (11) corresponding to the intermediate beam (14), and at least a part of a protrusion of the second support plate (17) onto the first plate body (11) covering an end region of the battery cells (3) that is close to the intermediate beam (14); The sealing cover (2) further includes a second reinforcing plate (23), the second reinforcing plate (23) being disposed at a position of the second plate body (21) corresponding to the intermediate beam (14), and at least a part of a protrusion of the second reinforcing plate (23) onto the second plate body (21) covering an end region of the battery cell (3) that is close to the intermediate beam (14). The battery box according to claim 1 .

3. the first support plate (16) comprises a first support portion (162), a protruding portion of the first support portion (162) onto the first plate body (11) covers the end region of the battery cell (3), and the length of the first support portion (162) in the extension direction of the battery cell (3) occupies 1 / 3 to 2 / 3 of the entire first support plate (16); and / or The first reinforcing plate (22) includes a first reinforcing portion (222), a protruding portion of the first reinforcing portion (222) toward the second plate body (21) covers the end region of the battery cell (3), and the length of the first reinforcing portion (222) in the extension direction of the battery cell (3) accounts for 1 / 3 to 2 / 3 of the entire first reinforcing plate (22).

3. The battery box according to claim 2.

4. the second support plate (17) comprises a second support portion (172), a protrusion of the second support portion (172) onto the first plate body (11) covering an end region of the battery cell (3) that is close to the intermediate beam (14), and a length of the second support portion (172) in the extension direction of the battery cell (3) is equal to a length of the first support portion (162) in the extension direction of the battery cell (3); and / or the second reinforcing plate (23) has a second reinforcing portion (232), and a protrusion of the second reinforcing portion (232) onto the second plate body (21) covers an end region of the battery cell (3) that is close to the intermediate beam (14), and the length of the second reinforcing portion (232) in the extension direction of the battery cell (3) is equal to the length of the first reinforcing portion (222) in the extension direction of the battery cell (3); 4. The battery box according to claim 3.

5. 5. The battery box of claim 4, wherein a protrusion of the first support portion (162) onto the first plate (11) at least partially overlaps a protrusion of the first reinforcing portion (222) onto the second plate (21), and a protrusion of the second support portion (172) onto the first plate (11) at least partially overlaps a protrusion of the second reinforcing portion (232) onto the second plate (21).

6. The length of the first support plate (16) in the extension direction of the battery cells (3) is equal to half the length of the second support plate (17) in the extension direction of the battery cells (3), and / or The battery box according to any one of claims 2 to 5, wherein the length of the first reinforcing plate (22) in the extension direction of the battery cell (3) is equal to half the length of the second reinforcing plate (23) in the extension direction of the battery cell (3).

7. The battery box according to any one of claims 1 to 6, wherein the first plate body (11) is a cooling plate, the first plate body (11) comprises a flat plate (111) and a corrugated plate (112) assembled to each other to form a dielectric channel therein, both ends of the corrugated plate (112) are configured as flat portions (1122) configured to be fixedly connected to the flat plate (111), the cross section of the first support plate (16) in the extension direction of the battery cell (3) is configured in a stepped shape, the first support plate (16) comprises a support body (1621) and a protrusion (1611) protruding outward from the support body (1621), and the protrusion (1611) is configured to be supported on the surface of the flat portion (1122).

8. 8. The battery box according to claim 7, wherein a cavity structure (164) is formed inside the first support plate (16), and a plurality of reinforcing ribs (163) are arranged in the cavity structure (164) at intervals in the extension direction of the battery cells (3).

9. 9. The battery box according to claim 7 or 8, wherein the first support plate (16) is provided with a notch (16211) configured to avoid a joint of the cooling plate.

10. 10. The battery box according to claim 2, wherein a plurality of studs (113) are arranged at positions of the first plate body (11) corresponding to the second support plate (17), the plurality of studs (113) are arranged at intervals in the extension direction of the second support plate (17), the second support plate (17) is provided with through holes (173) through which the studs (113) pass, and the studs (113) passing through the through holes (173) are connected to stud sleeves (174) to detachably position the second support plate (17) on the first plate body (11).

11. The battery box according to claim 10, wherein the through holes (173) are countersunk holes.

12. The battery box according to any one of claims 1 to 11, wherein the tray (1) further comprises a front beam (12) and a rear beam (13), the front beam (12) and the rear beam (13) being respectively arranged at both ends of the first plate body (11) in the extension direction of the battery cells (3), at least one of the front beam (12) and the rear beam (13) being provided with a chamber (5) for accommodating electrical components, and a protruding portion of the first support plate (16) onto the first plate body (11) covering at least a portion of the chamber (5).

13. 13. The battery box according to claim 12, wherein the chamber (5) comprises a first chamber (121) disposed on the front beam (12) and configured to accommodate a power distribution box (4), and wherein low-voltage plug-in mounting holes (123) and high-voltage plug-in mounting holes (124) are disposed on both sides of the first chamber (121), respectively; and / or the chamber (5) comprises a second chamber (131) disposed on the rear beam (13) and configured to accommodate a fuse and a relay, and wherein the fuse is configured to connect the plurality of battery cells (3) in series.

14. 14. The battery box according to claim 12 or 13, wherein the front beam (12) and / or the rear beam (13) further comprise side sealing covers (6) configured to seal the chamber (5), the side sealing covers (6) being detachably arranged on the front beam (12) and / or the rear beam (13), and a sealing ring (7) being arranged between the side sealing covers (6) and the front beam (12) and / or the rear beam (13).

15. The battery box according to any one of claims 12 to 14, further comprising an anti-explosion valve (8) disposed on each side of the chamber (5).

16. The battery box according to any one of claims 1 to 15, wherein the sealing cover (2) further comprises a heat insulating layer (24) and a composite material layer (25), and the second plate (21) is disposed between the heat insulating layer (24) and the composite material layer (25).

17. A battery pack comprising a battery cell (3) and a battery box (200) according to any one of claims 1 to 16.

18. A vehicle comprising a battery pack (100) according to claim 17.

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