TRAY ASSEMBLY, POWER BATTERY PACK, AND VEHICLE

A tray assembly includes a bottom plate that includes a main body portion and a raised edge portion, an expansion beam, and a first sealing member. The main body portion defines an accommodating cavity configured to accommodate a battery, and the raised edge portion is located on a peripheral of the main body portion and around the main body portion. The expansion beam is disposed on a first side of the raised edge portion and is configured to abut with the battery. The first sealing member includes a first portion disposed between the expansion beam and the raised edge portion.

FIELD

The present disclosure relates to the field of vehicle technologies, and in particular, to a tray assembly, a power battery pack, and a vehicle.

BACKGROUND

In the related art, sealing performance of a power battery pack is poor and hardly meets a design requirement. Especially when an expansion beam and a tray are separately processed members, a sealing arrangement of the power battery pack is complex.

SUMMARY

The present disclosure resolves at least one of the technical problems existing in the related art. Therefore, the present disclosure provides a tray assembly. The tray assembly has good sealing performance, to meet a sealing requirement of a power battery pack.

The present disclosure further provides a power battery pack including the foregoing tray assembly.

The present disclosure further provides a vehicle including the foregoing power battery pack.

According to embodiments of the present disclosure, in a first aspect, the tray assembly includes: a bottom plate, where the bottom plate includes a main body portion and a raised edge portion, the main body portion defines an accommodating cavity, the accommodating cavity is configured to accommodate a battery, and the raised edge portion is located on a peripheral of the main body portion and around the main body portion; an expansion beam, where the expansion beam is disposed on a first side of the raised edge portion, and the expansion beam is configured to abut with the battery; and a first sealing member, where the first sealing member includes a first portion, and the first portion is disposed between the expansion beam and the raised edge portion.

According to the embodiments of the present disclosure, the tray assembly provides the first sealing member between the expansion beam and the raised edge portion, to seal a gap between the raised edge portion and the expansion beam, so that the sealing performance of the tray assembly is improved. In this way, it is easy to meet a sealing requirement of the power battery pack.

In some embodiments, the tray assembly further includes: a side frame, where the side frame is located on a peripheral of the bottom plate and around the main body portion, the side frame includes multiple side beams connected end to end in sequence, each of the side beams is located on a second side of the raised edge portion and fixed to the raised edge portion, and the raised edge portion includes a first avoiding hole; and a fastener, where the fastener penetrates the first avoiding hole and connects the expansion beam to a corresponding side beam, and the first portion is disposed around the first avoiding hole.

In some embodiments, the first sealing member further includes a second portion, and the second portion is disposed between the fastener and a peripheral wall of the first avoiding hole.

In some embodiments, the side frame further includes a bushing. The bushing penetrates the first avoiding hole and is fixed to the corresponding side beam. The bushing includes a connecting hole. The fastener fits with the connecting hole. The first sealing member further includes a third portion, and the third portion is disposed between the bushing and a peripheral wall of the first avoiding hole.

In some embodiments, the tray assembly further includes: a second sealing member, where the second sealing member includes a fourth portion, and the fourth portion is disposed between each of the side beams and the raised edge portion.

In some embodiments, the fourth portion is disposed around the fastener.

In some embodiments, the side frame further includes the bushing. Each of the side beams includes a second avoiding hole. The bushing is fixed to each of the side beams and at least a portion of the bushing is located on one side of the second avoiding hole facing away from the raised edge portion. The bushing includes a connecting hole. The fastener penetrates the second avoiding hole and fits with the connecting hole.

In some embodiments, one end of the bushing protrudes from the first side of the raised edge portion facing the expansion beam and abuts against the expansion beam.

In some embodiments, the bushing is welded and fixed to a peripheral wall of the second avoiding hole, and a second sealing member covers a welding seam at the second avoiding hole.

In some embodiments, the first sealing member includes the third portion, and the third portion is disposed between the bushing and the peripheral wall of the first avoiding hole; and/or the second sealing member includes a fifth portion, and the fifth portion is disposed between the bushing and the peripheral wall of the first avoiding hole.

In some embodiments, a region of the bushing that abuts against the expansion beam is an annular region, and a radial distance between an outer circumferential edge and an inner circumferential edge of the annular region is greater than or equal to 1 mm.

In some embodiments, the first sealing member or the second sealing member includes a structural adhesive, and a thickness t of the structural adhesive satisfies 0.5 mm≤t≤1 mm.

In some embodiments, the bottom plate includes an insulating material.

In some embodiments, the expansion beam includes a carrying beam and a partition plate. The carrying beam defines a carrying cavity. The partition plate is disposed in the carrying cavity to divide the carrying cavity into a first carrying cavity and a second carrying cavity. The first carrying cavity is located on one side of the second carrying cavity away from the raised edge portion.

In some embodiments, the tray assembly further includes a fastener. The expansion beam further includes: a support member, where the support member is disposed in the second carrying cavity, the support member supports a first cavity wall of the second carrying cavity away from the partition plate and the partition plate, and the fastener penetrates the partition plate and the second carrying cavity and extends out of the second carrying cavity to fix the expansion beam to the corresponding side beam.

In some embodiments, the support member includes multiple support blocks. The multiple support blocks are disposed and spaced from each other along a length direction of the carrying beam. The tray assembly includes multiple fasteners, wherein each of the fasteners penetrates a corresponding support block.

In some embodiments, an area of a cross section of the support member is s1, and an area of a cross section of the second carrying cavity is s2, where 50%≤s1/s2≤60%. The cross section of the support member or the cross section of the second carrying cavity is perpendicular to the length direction of the carrying beam.

In some embodiments, a second cavity wall of the second carrying cavity away from the first carrying cavity includes a mounting through hole. The support member is disposed in the second carrying cavity. A first end of the support member abuts against the partition plate, and a second end of the support member fits with the mounting through hole and is connected to the first cavity wall of the second carrying cavity away from the partition plate.

In some embodiments, the side frame includes the bushing. The bushing is connected to the expansion beam and the fastener, and one end of the bushing adjacent to the expansion beam abuts against the support member.

According to embodiments of the present disclosure, in a second aspect, a power battery pack includes a battery, a sealing cover, and the tray assembly according to the first aspect of the present disclosure. The sealing cover covers an open side of the accommodating cavity and together with the tray assembly defines a mounting space. The battery is disposed in the mounting space.

According to the embodiments of the present disclosure, the power battery pack uses the foregoing tray assembly to meet a sealing requirement of the power battery pack.

In some embodiments, the power battery pack includes multiple batteries and two expansion beams, and the multiple batteries are disposed in a first direction. Each of the batteries extends along a second direction. The two expansion beams are respectively disposed on two sides of the multiple batteries in the first direction. At least one of the two expansion beams extends along the second direction. The second direction is perpendicular to the first direction.

According to embodiments of the present disclosure, in a third aspect, a vehicle includes the power battery pack according to the second aspect of the present disclosure.

According to the embodiments of the present disclosure, the vehicle uses the foregoing power battery pack to ensure safe use of the vehicle.

Additional aspects and advantages of the present disclosure may be given in the following description, some of which may become apparent from the following description or may be learned from practices of the present disclosure.

LIST OF REFERENCE NUMERALS

DETAILED DESCRIPTION

Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in accompanying drawings, where the same or similar elements or the elements having same or similar functions are denoted by the same or similar reference numerals throughout the description. The embodiments described below with reference to the accompanying drawings are examples and used for explaining the present disclosure, and are not as a limitation to the present disclosure.

The disclosure below provides many different embodiments or examples for implementing different structures of the present disclosure. To simplify the disclosure of the present disclosure, the following describes components and settings of some examples. Certainly, the components and settings are merely examples, and are not to limit the present disclosure. In addition, reference numerals and/or letters may be repeated in different examples in the present disclosure. Such repetitions are for simplification and clarity, which do not indicate relationships between the embodiments and/or settings discussed. In addition, the present disclosure provides examples of various processes and materials, but a person of ordinary skill in the art may be aware of the applicability of other processes and/or the use of other materials.

The following describes a tray assembly1according to the embodiments of the present disclosure with reference to the accompanying drawings.

As shown inFIG.1andFIG.4, the tray assembly1includes a bottom plate111. The bottom plate111includes a main body portion1111and a raised edge portion1112. The main body portion1111defines an accommodating cavity110. The accommodating cavity110is configured to accommodate a battery2. This facilitates ensuring stable mounting of the battery2, and in addition, the bottom plate111can protect the battery2. The raised edge portion1112is located on a peripheral side of the main body portion1111, and the raised edge portion1112is arranged/disposed around the main body portion1111. In this way, the raised edge portion1112can generally define an annular structure.

It should be noted that, in the description of the present disclosure, “annular” is to be understood in a broad sense, that is, not limited to “circular ring”. For example, it may be “polygonal ring”.

The tray assembly1further includes an expansion beam12. The expansion beam is arranged/disposed on one side (e.g., a first side) of the raised edge portion in a thickness direction. The expansion beam is adapted/configured to abut with the battery. For example, the expansion beam12may be in direct contact with the battery2, or another component may be arranged between the expansion beam12and the battery2to make the expansion beam12indirectly abut against the battery2. This facilitates the expansion beam12to withstand expansion force of the battery2.

It can be learned that, the expansion beam12and the bottom plate111are separately processed members.

As shown inFIG.2andFIG.8, the tray assembly1further includes a first sealing member141. The first sealing member141includes a first portion141a. The first portion141ais arranged/disposed between the expansion beam12and the raised edge portion1112. In this way, a portion of the first sealing member141is arranged between the expansion beam12and the raised edge portion1112, or the entire first sealing member141is arranged between the expansion beam12and the raised edge portion1112, to seal a gap between the expansion beam12and the raised edge portion1112, so that the tray assembly1has good sealing performance. Therefore, when the tray assembly1is used in a power battery pack100, it is easy to meet a sealing requirement of the power battery pack100, to ensure that the power battery pack100has good performance such as dustproof and waterproof. In addition, the first sealing member141is arranged conveniently, and has a large operating space.

According to the embodiments of the present disclosure, the tray assembly1provides the first portion141aof the first sealing member141between the expansion beam12and the raised edge portion1112, to seal the gap between the raised edge portion1112and the expansion beam12, so that the sealing performance of the tray assembly1is improved. In this way, it is easy to meet the sealing requirement of the power battery pack100.

In some embodiments, as shown inFIG.4,FIG.7, andFIG.8, the tray assembly1further includes a side frame112. The side frame112is located on a peripheral side of the bottom plate111, and the side frame112is arranged around the main body portion1111. The side frame112includes multiple side beams1121connected end to end in sequence, so that the side frame112defines an annular structure to facilitate the side frame112to stably support the bottom plate111. The side beam1121is located on the other side (e.g., a second side) of the raised edge portion1112in the thickness direction, and the side beam1121is fixed to the raised edge portion1112, so that the expansion beam12and the side beam1121are located on different sides of the thickness of the raised edge portion1112.

In an embodiment, the side beam1121may be a rolled steel member. Certainly, in some embodiments, the side beam1121may be an aluminum member.

As shown inFIG.8, the raised edge portion1112includes a first avoiding hole1112a. The tray assembly1further includes a fastener13. The fastener13penetrates the first avoiding hole1112a, and the fastener13fixedly connects the expansion beam12to the side beam1121, so that the first avoiding hole1112acan avoid the fastener13, to ensure that the expansion beam12is smoothly fixed to a corresponding side beam1121through the fastener13. The first portion141ais arranged/disposed around the first avoiding hole1112a, In an embodiment, a portion of the first sealing member141between the expansion beam12and the raised edge portion1112is arranged around the first avoiding hole1112a.

In some embodiments, the first sealing member141further includes a second portion, and the second portion is disposed between the fastener13and a peripheral wall of the first avoiding hole1112a. The first sealing member141ensures sealing between the expansion beam12and the raised edge portion1112, and also ensures sealing between the fastener13and the raised edge portion1112, further improving the sealing performance of the tray assembly1.

In an embodiment, the first sealing member141is a structural adhesive. The structural adhesive has good strength, corrosion resistance, and stable performance, to ensure service life of the tray assembly1. In addition, it is easy to implement bonding and fixing between the expansion beam12and the raised edge portion1112, to improve connection strength between the expansion beam12and the raised edge portion1112. A thickness of the first sealing member141is t1, where 0.5 mm≤t1≤1 mm. In this way, difficulty in controlling a processing process caused by an excessively small thickness of the first sealing member141can be avoided, and impact on a bonding effect of the structural adhesive caused by an excessively large thickness of the first sealing member141can also be avoided. For example, the thickness of the first sealing member141may be 0.5 mm, 0.7 mm, 0.8 mm, or 1 mm. Certainly, in some embodiments, the first sealing member141may be a sealing ring, for example, a rubber ring.

In an embodiment, when the first sealing member141is a structural adhesive, the structural adhesive is in a liquid state during a process of assembling the tray assembly1. The structural adhesive is arranged/disposed between the expansion beam12and the raised edge portion1112. Through extrusion between the expansion beam12and the raised edge portion1112, the structural adhesive easily overflows between the fastener13and the first avoiding hole1112a. Therefore, when the structural adhesive cures to form the first sealing member141, it is easy to seal the first portion141aof the first sealing member141between the expansion beam12and the raised edge portion1112, and seal the second portion of the first sealing member141between the fastener13and the first avoiding hole1112a.

In some embodiments, as shown inFIG.8, the side frame112further includes a bushing1122. The bushing1122penetrates the first avoiding hole1112a, and the bushing1122is fixed to the side beam1121. The bushing1122forms a connecting hole1122a. The fastener13is fixedly fitted with the connecting hole1122a. The first sealing member141further includes a third portion141c. The third portion141cis disposed between the bushing1122and a peripheral wall of the first avoiding hole1112a, to implement sealing between the bushing1122and the raised edge portion1112, further improving the sealing performance of the tray assembly1. In this case, the bushing1122may penetrate the first avoiding hole1112a.

In some embodiments, as shown inFIG.8, the tray assembly1further includes a second sealing member142. The second sealing member142includes a fourth portion142a. The fourth portion142ais arranged/disposed between the side beam1121and the raised edge portion1112. In this way, a portion of the second sealing member142is arranged between the side beam1121and the raised edge portion1112, or the entire second sealing member142is arranged between the side beam1121and the raised edge portion1112, to seal a gap between the side beam1121and the raised edge portion1112, further improving the sealing performance of the tray assembly1. This helps ensure that the power battery pack100has good performance such as dustproof and waterproof.

In some embodiments, as shown inFIG.2toFIG.4andFIG.8, the fourth portion142ais arranged/disposed around the fastener13. In an embodiment, a portion of the second sealing member142between the side beam1121and the raised edge portion1112is arranged around the fastener13, so that one side of the fastener13adjacent to the accommodating cavity110and one side of the fastener13away from the accommodating cavity110are respectively arranged with portions of the second sealing member142. In this way, the portion of the second sealing member142located on the side of the fastener13adjacent to the accommodating cavity110is disposed between the side beam1121and the expansion beam12, and the portion of the second sealing member142located on the side of the fastener13away from the accommodating cavity110is also disposed between the side beam1121and the expansion beam12, facilitating double sealing at the fastener13, to improve the sealing performance of the tray assembly1.

In an embodiment, the fastener13is a bolt.

In an embodiment, when the second sealing member142is a structural adhesive, the structural adhesive is in a liquid state during a process of assembling the tray assembly1. The structural adhesive is extruded when the fastener13fixedly connects the expansion beam12to the side beam1121. After the structural adhesive cures, it is easy to make the second sealing member142to be an integral member, to improve setting reliability of the second sealing member142.

In some embodiments, as shown inFIG.8, the side frame112further includes the bushing1122. The side beam1121forms a second avoiding hole1121a. The bushing1122is fixed to the side beam1121, and at least a portion of the bushing1122is located on one side of the second avoiding hole1121afacing away from the raised edge portion1112. The bushing1122forms a connecting hole1122a. The fastener13penetrates the second avoiding hole1121aand penetrates the connecting hole1122a, and the fastener13is fixedly fitted with the connecting hole1122a, so that the fastener13is fixedly connected to the bushing1122, and the expansion beam12is fixed to a corresponding side beam1121.

In this way, by configuring the bushing1122on the side beam1121and allowing the fastener13to fixedly connect the expansion beam12to the bushing1122, fixed connection between the expansion beam12and the side beam1121is implemented. Therefore, there is no need to separately process the connecting hole1122aon the side beam1121. This helps simplify a structure of the side beam1121, and facilitates arrangement of the connecting hole1122a. In addition, at least a portion of the bushing1122is located on one side of the second avoiding hole1121afacing away from the raised edge portion1112. This helps increase a length of the fastener13extending out of the expansion beam12, to improve connection strength between the side beam1121and the expansion beam12to some extent.

In some embodiments, as shown inFIG.8, one end of the bushing1122protrudes from one side of the raised edge portion1112facing the expansion beam12, and the one end of the bushing1122abuts against the expansion beam12. In this way, the one end of the bushing1122abuts against the expansion beam12through the first avoiding hole1112aand the second avoiding hole1121a, so that the bushing1122tightly abuts against the expansion beam12under an action of the fastener13. This helps further improve the connection strength between the side beam1121and the expansion beam12.

In some embodiments, as shown inFIG.8, the bushing1122and a peripheral wall of the second avoiding hole1121aare welded and fixed. The second sealing member142covers a welding seam at the second avoiding hole1121a. In this way, the second sealing member142ensures sealing between the side beam1121and the raised edge portion1112, and also ensures sealing between the bushing1122and the side beam1121, further improving the sealing performance of the tray assembly1.

In an embodiment, the second sealing member142is a structural adhesive. The structural adhesive has good strength, corrosion resistance, and stable performance, to ensure service life of the tray assembly1. In addition, it is easy to implement bonding and fixing between the side beam1121and the raised edge portion1112, to improve connection strength between the side beam1121and the raised edge portion1112. A thickness of the second sealing member142is t2, where 0.5 mm≤t2≤1 mm. In this way, difficulty in controlling a processing process caused by an excessively small thickness of the second sealing member142can be avoided, and impact on a bonding effect of the structural adhesive caused by an excessively large thickness of the second sealing member142can also be avoided. For example, the thickness of the second sealing member142may be 0.5 mm, 0.7 mm, 0.8 mm, or 1 mm.

In some embodiments, as shown inFIG.8, the first sealing member141includes the third portion141c, and the third portion141cis disposed between the bushing1122and the peripheral wall of the first avoiding hole1112a; and/or the second sealing member142includes a fifth portion142c, and the fifth portion142cis disposed between the bushing1122and the peripheral wall of the first avoiding hole1112a. The schemes may includes: 1) The first sealing member141includes the third portion141c, and the third portion141cis disposed between the bushing1122and the peripheral wall of the first avoiding hole1112a;2) The second sealing member142includes the fifth portion142c, and the fifth portion142cis disposed between the bushing1122and the peripheral wall of the first avoiding hole1112a;3) The first sealing member141includes the third portion141c, the second sealing member142includes the fifth portion142c, and either of the third portion141cand the fifth portion142cis disposed between the bushing1122and the peripheral wall of the first avoiding hole1112a. It can be learned that the first sealing member141and/or the second sealing member142further ensure/ensures the sealing between the bushing1122and the raised edge portion1112, to further improve/the sealing performance of the tray assembly1.

In an embodiment, when either of the first sealing member141and the second sealing member142is disposed between the bushing1122and the peripheral wall of the first avoiding hole1112a, the first sealing member141and the second sealing member142may form an integral member, to further improve the sealing performance of the tray assembly1. Certainly, when a portion of the first sealing member141or a portion of the second sealing member142is disposed between the bushing1122and the peripheral wall of the first avoiding hole1112a, the first sealing member141and the second sealing member142may also form an integral member.

In an embodiment, a reserved gap p is provided between the bushing1122and the peripheral wall of the first avoiding hole1112a, where 0.5 mm≤p≤1 mm, to ensure that during the process of assembling the tray assembly1, the first sealing member141and/or the second sealing member142overflow/overflows between the bushing1122and the peripheral wall of the first avoiding hole1112a, to implement sealing between the bushing1122and the peripheral wall of the first avoiding hole1112a.

In some embodiments, as shown inFIG.8, a region of the bushing1122that abuts against the expansion beam12is an annular region. A radial distance between an outer circumferential edge and an inner circumferential edge of the annular region is greater than or equal to 1 mm, to ensure an effective abutment between the bushing1122and the expansion beam12.

It should be noted that, in the description of the present disclosure, “annular” is to be understood in a broad sense, that is, not limited to “circular ring”. For example, it may be “polygonal ring”. The “annular region” may then refer to a circular annular region, a polygonal ring region, or the like. In the example ofFIG.8, the annular region of the bushing1122that abuts against the expansion beam12is a circular annular region. A radial distance between an outer circumferential edge and an inner circumferential edge of the circular annular region is y, where y is greater than or equal to 1 mm.

In some embodiments, either of the first sealing member141and the second sealing member142is a structural adhesive. The structural adhesive has good strength, corrosion resistance, and stable performance, to ensure service life of the tray assembly1. A thickness of the structural adhesive is t, where 0.5 mm≤t≤1 mm. In this way, difficulty in controlling a processing process caused by an excessively small thickness of the structural adhesive can be avoided, and impact on a bonding effect of the structural adhesive caused by an excessively large thickness of the structural adhesive can also be avoided. For example, the thickness t of the structural adhesive may be 0.5 mm, 0.7 mm, 0.8 mm, or 1 mm.

In some embodiments, the bottom plate111is an insulating material member. In this case, the bottom plate111has good electrical insulation. Even if cooling liquid of the power battery pack100leaks or the like, a risk of high-voltage arcing between the bottom plate111and the battery2can be avoided, ensuring normal use of the power battery pack100.

In an embodiment, the bottom plate111is a composite material member. It is easy to ensure structural strength of the bottom plate111while ensuring electrical insulation of the bottom plate111, so that the bottom plate111stably carries the battery2.

In some embodiments, as shown inFIG.2,FIG.3,FIG.8, andFIG.9, the expansion beam12includes a carrying beam1201and a partition plate1202. The carrying beam1201defines a carrying cavity1201a. The partition plate1202is arranged/disposed in the carrying cavity1201ato divide the carrying cavity1201ainto a first carrying cavity1201band a second carrying cavity1201c. The first carrying cavity1201bis located on one side of the second carrying cavity1201cfacing away from the raised edge portion1112. It can be learned that when the expansion beam12is in use, the partition plate1202can act to transmit expansion force, to ensure a carrying capacity of the expansion beam12.

For example, in the example ofFIG.8, the first sealing member141is arranged at least between the carrying beam1201and the raised edge portion1112.

In some embodiments, as shown inFIG.3andFIG.7, the partition plate1202is arranged horizontally. A height of the first carrying cavity1201bis equal to a height of the second carrying cavity1201c. For example, in an up-down direction, the partition plate1202is located substantially in a middle of the carrying cavity1201a. When the battery2expands, a middle position of the battery2deforms the most in the up-down direction. In this case, a position of the partition plate1202can better match deformation distribution of the battery2, to ensure that the expansion beam12stably withstands the expansion force of the battery2.

For example, a surface of the expansion beam12facing the battery2is subjected to the expansion force of the battery2. On the surface of the expansion beam12, the closer to the middle position, the greater the force. By setting the height of the first carrying cavity1201bequal to the height of the second carrying cavity1201c, it is easy to ensure that the partition plate1202stably transmits the expansion force.

In some embodiments, as shown inFIG.3andFIG.7, in a cross section of the expansion beam12, the carrying beam1201and the partition plate1202define an “8”-shaped structure. In this case, a shape of a cross section of the carrying beam1201is a square structure, and two side surfaces of width of the carrying beam1201may be formed substantially as a plane. At least one of the two side surfaces may be arranged toward the battery2to form a carrying surface, then the carrying surface is a plane, so that the force on the expansion beam12is uniform. This helps avoid stress concentration of the expansion beam12due to uneven force, reduces a risk of bending of the expansion beam12, and effectively ensures structural safety of the tray assembly1. The cross section of the expansion beam12is perpendicular to a length direction of the expansion beam12.

It may be understood that, during a process of mounting and using the expansion beam12, if the expansion beam12interferes with another structure such as a cooling pipe, an avoiding portion may be provided on the carrying beam1201, to ensure smooth mounting of the expansion beam12after ensuring structural strength of the carrying beam1201.

In some embodiments, as shown inFIG.3andFIG.7, the carrying beam1201and the partition plate1202form an integral bent member, and the bending times is reduced. This simplifies a bending process and reduces processing costs.

For example, in the example ofFIG.9, for a front expansion beam12and a middle expansion beam12, the carrying beam1201and the partition plate1202need to be bent 7 times in the bending process, which is a simple and convenient process.

In some embodiments, as shown inFIG.2andFIG.3, the partition plate1202has a segmentation portion1202aand a connecting portion1202b. The segmentation portion1202ais located between the first carrying cavity1201band the second carrying cavity1201c. At least one of two opposite ends of the segmentation portion1202ais provided with the connecting portion1202b. The connecting portion1202bis superimposed with a cavity wall of the carrying cavity1201a, and the connecting portion1202bis fixedly connected to the cavity wall of the carrying cavity1201a. A length of the connecting portion1202bin a normal direction of the segmentation portion1202ais x, where 6 mm≤x≤12 mm. In this way, by properly setting the length of the connecting portion1202b, a connection area between the connecting portion1202band the cavity wall of the carrying cavity1201acan be ensured, so that connection strength between the connecting portion1202band the cavity wall of the carrying cavity1201ais ensured, to ensure a stable arrangement of the partition plate1202.

When the two opposite ends of the segmentation portion1202aare respectively arranged with connecting portions1202b, lengths of the two connecting portions1202bin the normal direction of the segmentation portion1202amay be equal or not equal.

It may be understood that, when the carrying beam1201and the partition plate1202form the integral bent member, the length of the connecting portion1202bis in a range of 6 mm to 12 mm, to ensure bending convenience of the partition plate1202, which helps reduce difficulty of processing. In this case, at the connecting portion1202b, a steel plate corresponding to the expansion beam12has an overlapping portion. In this way, in the present disclosure, the expansion beam12has a small amount of material and low costs.

In an embodiment, the connecting portion1202band the cavity wall of the carrying cavity1201aare welded and fixed, to ensure a sufficient welding region between the connecting portion1202band the cavity wall of the carrying cavity1201a. Therefore, welding strength between the connecting portion1202band the cavity wall of the carrying cavity1201ais ensured, improving a structural stability of the carrying cavity1201a.

In some embodiments, as shown inFIG.8, the tray assembly1further includes the fastener13. The expansion beam12further includes a support member1203. The support member1203is arranged/disposed in the second carrying cavity1201c, and the support member1203supports the partition plate1202and one cavity wall of the second carrying cavity1201caway from the partition plate1202, so that the support member1203can perform a good support function on the second carrying cavity1201c. This effectively ensures a structural stability of the second carrying cavity1201cduring a process of mounting the expansion beam12, using the expansion beam12, or the like, to avoid large deformation of the second carrying cavity1201c, and ensuring reliable use of the expansion beam12. The fastener13penetrates the partition plate1202and the second carrying cavity1201c, and the fastener13extends out of the second carrying cavity1201cto fix the expansion beam12to the side beam1121. Because the support member1203is arranged in the second carrying cavity1201c, the support member1203can carry fastening force of the fastener13, to avoid large deformation of the partition plate1202easily caused by excessive fastening force, effectively ensuring the carrying capacity of the expansion beam12.

It can be learned that, in the present disclosure, arranging the support member1203is helpful to reduce an arrangement requirement of the fastener13. In an embodiment, when the fastener13is arranged, there is no need to consider a situation that the fastening force causes the large deformation of the partition plate1202. This facilitates arrangement of the fastener13.

For example, in the example ofFIG.9, one cavity wall of the first carrying cavity1201bfacing away from the second carrying cavity1201cincludes an avoiding through hole1201e. Taking a plane perpendicular to an axial direction of the avoiding through hole1201eas a projection surface, an orthographic projection of a hole wall of the avoiding through hole1201eon the projection surface is located outside an outer contour of an orthographic projection of the fastener13on the projection surface, so that the fastener13can penetrate the partition plate1202and the second carrying cavity1201cthrough the avoiding through hole1201e. The fastener13is a bolt. The partition plate1202includes a mating through hole. The fastener13penetrates the mating through hole, and one end of the fastener13abuts against one side of the partition plate1202facing away from the second carrying cavity1201c. The other end of the fastener13is located outside the second carrying cavity1201c, and the other end of the fastener13is fixedly connected to the side beam1121.

In some embodiments, as shown inFIG.3andFIG.8, the fastener13penetrates the support member1203, that is, the support member1203includes a through hole. The fastener13penetrates the through hole, and the fastener13extends out of the through hole to be fixedly connected to the side beam1121. In this case, an edge portion of the through hole can stably carry the fastening force, so that either of the support member1203and the fastener13is evenly forced. This helps further avoid the large deformation of the partition plate1202.

Certainly, the present disclosure is not limited thereto. In some embodiments, the support member1203includes multiple support blocks1203a. The multiple support blocks1203aare arranged/disposed and spaced away from each other along a second direction. The fastener13is arranged between two adjacent support blocks1203a, so that the two adjacent support blocks1203acan carry the fastening force of the fastener13.

In an embodiment, when the through hole is a circular hole, a diameter of the through hole is greater than or equal to an outer diameter of the fastener13.

In some embodiments, the support member1203includes multiple support blocks1203a. The multiple support blocks1203aare arranged spaced away along a length direction of the carrying beam1201. Each fastener13penetrates a corresponding support block1203a. In this case, multiple fasteners13are arranged spaced away along the second direction, to ensure mounting and fixing of the entire expansion beam12while ensure that the entire partition plate1202does not undergo the large deformation.

It may be understood that a quantity of support blocks1203amay be greater than or equal to a quantity of fasteners13. In an embodiment, the quantity of support blocks1203ais n, where 4≤n≤8, but is not limited thereto.

In some embodiments, an area of a cross section of the support member1203is s1, and an area of a cross section of the second carrying cavity1201cis s2, where 50%≤s1/s2≤60%. Either of the cross section of the support member1203and the cross section of the second carrying cavity1201cis perpendicular to the length direction of the carrying beam1201. In this way, a relative size of the area of the cross section of the support member1203and the area of the cross section of the second carrying cavity1201cis proper. This facilitates a smooth arrangement of the support block1203ain the second carrying cavity1201c, and in addition, ensures a good carrying capacity of the support member1203.

In some embodiments, as shown inFIG.8andFIG.9, one cavity wall of the second carrying cavity1201caway from the first carrying cavity1201bincludes a mounting through hole1201d, and a support member1203is arranged in the second carrying cavity1201c. One end of the support member1203abuts against the partition plate1202. The other end of the support member1203is fitted with the mounting through hole1201d, and the other end of the support member1203is fixedly connected (for example, welded and fixed) to the cavity wall of the second carrying cavity1201caway from the partition plate1202, to ensure that the support member1203effectively supports the second carrying cavity1201c. This avoids the large deformation of the second carrying cavity1201c, and in addition, avoids a misalignment of the support member1203relative to the second carrying cavity1201c, ensuring a stable arrangement of the support member1203. In this case, the first sealing member141may be arranged between the carrying beam1201and the raised edge portion1112, and between the support member1203and the raised edge portion1112.

In an embodiment, taking a plane perpendicular to an axial direction of the mounting through hole1201das a projection surface, an orthographic projection of a hole wall of the mounting through hole1201don the projection surface is located outside an outer contour of an orthographic projection of the support member1203on the projection surface, so that the support member1203is configured to be arranged in the second carrying cavity1201cthrough the mounting through hole1201d. That is, the mounting through hole1201dcan allow the support member1203to pass through, to facilitate mounting of the support member1203. Certainly, the configuration of the support member1203is not limited thereto. In some embodiments, the support member1203may be arranged inside the second carrying cavity1201cthrough one end of the second carrying cavity1201cin the second direction. At this case, two ends of the support member1203in a first direction may respectively abut against corresponding cavity walls of the second carrying cavity1201c, and the support member1203can also effectively support the second carrying cavity1201c.

In some embodiments, as shown inFIG.8, the side frame112includes the bushing1122. The bushing1122is fixedly connected to the expansion beam12and the fastener13separately, and one end of the bushing1122adjacent to the expansion beam12abuts against the support member1203. The bushing1122tightly abuts against the support member1203under an action of the fastener13. This helps further improve the connection strength between the side beam1121and the expansion beam12.

In an embodiment, the bushing1122and the side beam1121are welded and fixed.

In an embodiment, a region of the bushing1122that abuts against the support member1203is an annular region. A radial distance between an outer circumferential edge and an inner circumferential edge of the annular region is greater than or equal to 1 mm, to ensure an effective abutment between the bushing1122and the support member1203.

In an embodiment, a wall thickness of the bushing1122is equal to a wall thickness of the support member1203.

According to embodiments of a second aspect of the present disclosure, as shown inFIG.10, a power battery pack100includes a battery2, a sealing cover3, and the tray assembly1according to the embodiments of the first aspect of the present disclosure. The sealing cover3covers an open side of the accommodating cavity110, and the sealing cover3together with the tray assembly1defines a mounting space100a. The battery2is provided in the mounting space100a.

According to the embodiments of the present disclosure, the power battery pack100uses the foregoing tray assembly1to meet a sealing requirement of the power battery pack100.

In some embodiments, as shown inFIG.1,FIG.3,FIG.5, andFIG.7, multiple batteries2exist, and the multiple batteries2are arranged in a first direction (for example, a direction AA′ inFIG.5). Each of the batteries2extends along a second direction (for example, a direction DD′ inFIG.5), where the second direction is perpendicular to the first direction. A quantity of expansion beams12may be two, and the two expansion beams12are respectively arranged on two sides of the multiple batteries2in the first direction. In an embodiment, one expansion beam12is arranged on one side of the multiple batteries2in the first direction, and the other expansion beam12is arranged on the other side of the multiple batteries2in the first direction. A direction of expansion force of the battery2is substantially parallel to the first direction. Either of the expansion beams12extends along the second direction, so that either of the expansion beams12withstands the expansion force of the entire battery2.

In this way, by configuring the expansion beams12respectively on two sides in an arrangement direction of the multiple batteries2, a small quantity of expansion beams12is used to withstand the expansion force of the battery2, ensuring safe use of the power battery pack100.

According to embodiments of a third aspect of the present disclosure, as shown inFIG.11, a vehicle200includes the power battery pack100according to the embodiments of the second aspect of the present disclosure.

According to the embodiments of the present disclosure, the vehicle200uses the foregoing power battery pack100, to ensure safe use of the vehicle.

Other configurations and operations of the vehicle200according to the embodiments of the present disclosure are known to a person of ordinary skill in the art and will not be described in detail herein.

In the description of the present disclosure, it should be understood that orientation or position relationships indicated by the terms such as “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “on”, “below”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “anticlockwise”, “axial direction”, “radial direction”, and “circumferential direction” are based on orientation or position relationships shown in the accompanying drawings, and are used only for ease and brevity of illustration and description, rather than indicating or implying that the mentioned apparatus or component needs to have a particular orientation or needs to be constructed and operated in a particular orientation. Therefore, such terms should not be construed as limiting of the present disclosure. In addition, a feature defined to be “first” or “second” may explicitly or implicitly include one or more features. In the description of the present disclosure, unless otherwise stated, “a plurality of” means two or more than two.

In the description of the present disclosure, it should be noted that, unless otherwise explicitly specified or defined, the terms such as “mount”, “connect”, and “connection” should be understood in a broad sense. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; the connection may be a mechanical connection or an electrical connection; or the connection may be a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. A person of ordinary skill in the art may understand meanings of the foregoing terms in the present disclosure according to situations.

In the descriptions of this specification, descriptions of a reference term such as “an embodiment”, “some embodiments”, “an exemplary embodiment”, “an example”, “a specific example”, or “some examples” means that a feature, structure, material, or characteristic that is described with reference to the embodiment or the example is included in at least one embodiment or example of the present disclosure. In this specification, schematic descriptions of the foregoing terms do not necessarily refer to the same embodiment or example. In addition, the feature, the structure, the material, or the characteristic that is described may be combined in a proper manner in any one or more of the embodiments or examples.

Although the embodiments of the present disclosure have been shown and described, a person of ordinary skill in the art may understand that various changes, modifications, replacements, and variations may be made to the embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is as defined by the appended claims and their equivalents.