CN109216602B

CN109216602B - Battery tray and battery pack assembly with same

Info

Publication number: CN109216602B
Application number: CN201710526278.6A
Authority: CN
Inventors: 沈晞; 郑卫鑫; 鲁志佩; 谭晶; 卢甲; 朱燕; 朱建华
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2020-12-25
Anticipated expiration: 2037-06-30
Also published as: CN109216602A

Abstract

The invention discloses a battery tray and a battery pack assembly with the same, wherein the battery tray comprises: a tray body; the partition is suitable for being connected with the tray body above the tray body so as to define a plurality of accommodating spaces for placing batteries with the tray body; and a thermal management portion at least partially embedded in the partition. According to the battery tray provided by the embodiment of the invention, the weight is light, the strength is good, the heat dissipation is more uniform, and each battery monomer can be fully and efficiently dissipated.

Description

Battery tray and battery pack assembly with same

Technical Field

The invention relates to the technical field of vehicles, in particular to a battery tray and a battery pack assembly with the same.

Background

In the related art, increasing the energy density of a battery is an important means for optimizing a power battery, and there are two conventional methods for increasing the energy density of a battery: one is to use a material with higher energy density; and the other is that the same battery module obtains higher energy density through improving the structure of the battery. Among them, the improvement of the battery structure generally adopts a method of reducing weight and compacting, particularly, the reduction of weight is most effective, and the above method can reduce the weight of the battery pack, but also causes the strength of the battery pack to be reduced, resulting in poor safety and reliability of the battery pack, by reducing or eliminating a part of structural members or reducing the thickness of materials.

Meanwhile, due to the improvement of requirements on the multiplying power, the power and the like of the power battery, the heat management of the battery in the using process also becomes a main aspect of current research and development. The technology of present mainstream has liquid cooling, forced air cooling, phase transition cooling etc. and the most independent setting of thermal management system has not only increased the design degree of difficulty in battery module or battery package, is unfavorable for the demand of compactization and lightweight moreover.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the battery tray which is light in weight, good in strength, more uniform in heat dissipation and more compact in structure.

The invention also provides a battery pack assembly with the battery tray.

A battery tray according to an embodiment of a first aspect of the present invention includes: a tray body; the partition is suitable for being connected with the tray body above the tray body so as to define a plurality of accommodating spaces for placing batteries with the tray body; and a thermal management portion at least partially embedded in the partition.

According to the battery tray provided by the embodiment of the invention, the heat management part is arranged to conveniently manage the heat of the battery, especially to conveniently dissipate the heat of the battery, so that the heat dissipation efficiency is improved. Furthermore, the partition for partitioning the space above the battery tray is arranged, so that an independent space is provided for installation of each battery cell, and meanwhile, the heat management part is at least partially embedded in the partition, so that the heat pipe heat management part can be protected, and the space of the whole battery tray is more reasonably utilized and more compactly arranged.

According to the battery tray of one embodiment of the present invention, the heat management portion includes at least one of a heat pipe and a cold pipe, at least a part of at least one of the cold pipe and the heat pipe being embedded in the partition.

According to a battery tray of an embodiment of the present invention, the heat management part includes: the cold pipe is embedded in the separator; and a heat pipe, a part of which is connected with the cold pipe and is positioned in the separator.

According to some embodiments of the invention, another portion of the heat pipe is embedded in the tray body or located on the upper surface of the tray body.

Optionally, a receiving groove is provided in the separator, the receiving groove having a notch, a portion of the cold pipe and the heat pipe being located in the receiving groove and another portion of the heat pipe protruding from the notch of the receiving groove.

Further, the partition is a grating including a horizontal partition and a vertical partition vertically connected to each other, the horizontal partition and the vertical partition are vertically connected to the tray body, and the receiving groove is formed on at least one of the horizontal partition and the vertical partition.

In some embodiments, the heat pipes extend in a longitudinal direction and the cold pipes extend in a transverse direction, the number of the heat pipes is multiple, the heat pipes are distributed in the transverse direction, the heat pipes are symmetrically distributed and connected to two sides of the cold pipes, and the accommodating grooves are formed in the transverse partition plate.

According to the battery tray provided by the embodiment of the invention, the heat management part comprises the heat pipe, the separator is internally provided with the accommodating groove, the heat pipe is at least partially positioned in the accommodating groove, and the accommodating groove is internally provided with the circulating cavity communicated with the outside.

In some embodiments, a portion of the heat pipe is located in the receiving groove and another portion of the heat pipe is embedded in the tray body or located on the upper surface of the tray body.

In some embodiments, the heat pipe comprises: the vertical pipe section is parallel to the cold pipe, and extends into the accommodating groove and is connected with the cold pipe; and the horizontal pipe section is connected with the bottom end of the vertical pipe section, and the plane of the horizontal pipe section is vertical to the transverse partition plate and the longitudinal partition plate.

According to some embodiments of the invention, the cold pipe and the hot pipe are both flat pipes.

According to a battery tray of an embodiment of the present invention, the tray body includes: the bottom of the tray is a carbon fiber layer and/or a glass fiber layer; a reinforcing part; and the tray top is suitable for being superposed above the tray bottom, the reinforcing part is clamped between the tray bottom and the tray top, and the tray top is a carbon fiber layer and/or a glass fiber layer.

The battery pack assembly according to the embodiment of the second aspect of the present invention includes: batteries and the battery tray.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a disassembled schematic view of a battery tray according to a first embodiment of the present invention.

Fig. 2 is a schematic view of a battery tray according to a first embodiment of the present invention.

Fig. 3 is a schematic sectional view of a battery tray according to a first embodiment of the present invention.

Fig. 4 is a partially enlarged schematic view of the area a in fig. 3.

Fig. 5 is a schematic view of a thermal management section according to a first embodiment of the present invention.

Fig. 6 is a disassembled schematic view of a battery tray according to a second embodiment of the present invention (thermal management section not shown).

Fig. 7 is a schematic view of a battery tray according to a second embodiment of the present invention (thermal management section not shown).

Fig. 8 is a schematic top view of a battery tray according to a second embodiment of the present invention (thermal management section not shown).

Fig. 9 is a schematic sectional view taken along line C-C in fig. 8.

Fig. 10 is a disassembled schematic view of a battery tray (thermal management section not shown) according to an embodiment of the present invention.

Fig. 11 is a schematic view of a battery tray according to an embodiment of the present invention (thermal management section not shown).

Fig. 12 is a schematic cross-sectional view of a battery tray according to an embodiment of the present invention (thermal management section not shown).

Fig. 13 is a partially enlarged schematic view of the region B in fig. 12.

Fig. 14 is a partially enlarged schematic view of a reinforcing portion of a battery tray according to an embodiment of the present invention (the reinforcing portion is a honeycomb).

Fig. 15 is a schematic view of a reinforcing part of a battery tray according to another embodiment of the present invention (the reinforcing part is a light alloy skeleton).

Reference numerals:

the battery tray 100 is provided with a battery tray,

a tray bottom 10, a second bottom wall 11, a second side wall 12,

a reinforcing part 20, a light alloy framework 20a, honeycomb holes 21, an outer framework 22, an inner framework 23,

a tray top 30, a first bottom wall 31, a first side wall 32, a mounting lug c, a communication hole 33,

a rigid mounting portion 40, a stop flange 41, a mounting through hole 42,

the heat management part 50, the heat pipe 51, the horizontal pipe section 511, the vertical pipe section 512, the cold pipe 52, the refrigerant inlet 521, the refrigerant outlet 522,

separator 60, diaphragm 61, longitudinal diaphragm 62, receiving groove 63, notch 631.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A battery tray 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 15.

As shown in fig. 1, a battery tray 100 according to an embodiment of the first aspect of the present invention includes: a tray body, a partition 60, and a thermal management section 50. The partitions 60 are adapted to be coupled with the tray body above the tray body to define a plurality of receiving spaces with the tray body for placing the batteries, and the thermal management section 50 is at least partially embedded in the partitions 60.

According to the battery tray 100 of the embodiment of the invention, the heat management part 50 is arranged to facilitate the management of the heat of the battery, particularly the heat dissipation of the battery, so that the heat dissipation efficiency is improved. Further, through setting up the separator 60 that carries out the subregion to the space above battery tray 100, provide independent space for the installation of battery, the separator 60 has the heat preservation adiabatic effect simultaneously and can make partial heat management portion 50 of inlaying establishing in separator 60 keep warm, avoids the heat exchange with the battery, can also form the protection to heat management portion 50, makes the holistic space utilization of battery tray 100 more reasonable, arrange compacter.

According to the battery tray 100 of one embodiment of the present invention, the heat management part 50 includes at least one of the hot pipe 51 and the cold pipe 52, and at least a part of at least one of the cold pipe 52 and the hot pipe 51 is embedded in the partition 60. Wherein, the hot pipe 51 is used for containing a heat transfer medium, the cold pipe 52 is used for refrigeration, the cold pipe 52 is a pipeline for circulating a refrigeration medium, and the refrigeration medium can be liquid, air, etc.; the refrigeration method is not limited to liquid cooling, air cooling, and the like.

Specifically, when the heat management unit 50 includes only the heat pipe 51, the battery tray 100 removes heat from the battery through the heat pipe 51, and cools the heat pipe 51 by a cooling device provided outside the battery tray 100. When thermal management portion 50 only included cold pipe 52, battery tray 100 only directly exchanges heat with the battery through cold pipe 52 and then to battery rapid cooling, when thermal management portion 50 both included heat pipe 51 and cold pipe 52, battery tray 100 exported the heat of battery to cold pipe 52 through heat pipe 51, and then cooled down heat pipe 51 through cold pipe 52 to make battery tray 100's continuous heat dissipation.

In other words, the heat management unit 50 may include only the heat pipe 51, and the heat pipe 51 may be entirely embedded in the partition 60, or a part of the heat pipe 51 may be embedded in the partition 60 and another part thereof may extend out of the partition 60. In other embodiments, the thermal management section 50 may only include the cold pipe 52, and the cold pipe 52 may be entirely embedded in the partition 60, or a part of the cold pipe 52 may be embedded in the partition 60. In addition, the thermal management unit 50 may also include a cold pipe 52 and a hot pipe 51, at least one of the cold pipe 52 and the hot pipe 51 may be embedded in the partition 60, the cold pipe 52 may be embedded in the partition 60 in whole or in part, and the hot pipe 51 may be embedded in the partition 60 in whole or in part.

First embodiment

In the particular embodiment shown in fig. 1 and 2, the thermal management section 50 includes: the cold pipe 52 is embedded in the partition 60, and the hot pipe 51 is connected with the cold pipe 52 and located in the partition 60. Therefore, the heat pipe 51 can conduct heat quickly, and the heat pipe 51 is cooled by the cold pipe 52 connected with the heat pipe 51, so that the heat pipe 51 can continuously lead out the heat of the battery, and the heat exchange efficiency is higher.

Specifically, another portion of the heat pipe 51 may be embedded in the tray body or the heat pipe 51 is located on the upper surface of the tray body. As shown in fig. 3 and 4, a part of the heat pipe 51 is connected to the cold pipe 52 and is located in the partition 60, another part of the heat pipe 51 may be completely or partially embedded in the tray body, and a top surface of the pipe section of the heat pipe 51 embedded in the tray body may be higher than an upper surface of the tray body, may be at the same level as the upper surface of the tray body, or may be lower than the upper surface of the tray body.

When the upper surface of the horizontal tube segment 511 of the heat pipe 51 is lower than the upper surface of the tray body, the battery cannot directly contact the heat pipe 51, and the heat pipe is used in cooperation with the heat conducting member to normally conduct the heat of the battery into the heat pipe 51. Specifically, the heat conducting member may be one or more of silicone, polyurethane, and epoxy resin.

In other embodiments, the divider 60 has a receiving groove 63 therein, the receiving groove 63 has a notch 631, a portion of the cold pipe 52 and the hot pipe 51 is located within the receiving groove 63 and another portion of the hot pipe 51 protrudes from the notch 631 of the receiving groove 63. Specifically, the cold pipes 52 are all located in the receiving grooves 63 of the partition 60, the pipe sections of the hot pipes 51 connected to the cold pipes 52 are located in the receiving grooves 63, and another part of the pipe sections of the hot pipes 51 protrude from the notches 631 of the receiving grooves 63 and protrude into the tray body.

In the embodiment shown in fig. 1 and 2, the partitioning member 60 may be a grating including a diaphragm 61 and a longitudinal diaphragm 62 vertically connected to each other, the diaphragm 61 and the longitudinal diaphragm 62 being vertically connected to the tray body, and the receiving groove 63 is formed on at least one of the diaphragm 61 and the longitudinal diaphragm 62. Specifically, the transverse partition 61 extends in the length direction of the battery tray 100, the longitudinal partition 62 extends in the width direction of the battery tray 100, and the transverse partition 61 and the longitudinal partition 62 are perpendicular to each other and connected together, and the perpendicular connection described herein includes an approximately perpendicular connection.

In some embodiments, the heat pipes 51 extend in a longitudinal direction and the cold pipes 52 extend in a transverse direction, the number of the heat pipes 51 is multiple, the plurality of heat pipes 51 are distributed in the transverse direction, the plurality of heat pipes 51 are symmetrically distributed and connected to two sides of the cold pipes 52, and the receiving groove 63 is formed on the diaphragm 61. Therefore, the cold pipe 52 and a part of the heat pipe 51 are arranged in the grid 60, so that the cold loss of the cold pipe 52 is reduced, the heat exchange efficiency of the cold pipe 52 to the heat pipe 51 is improved, and the battery can be rapidly cooled.

In some embodiments, the heat pipe 51 includes: the vertical pipe section 512 is parallel to the cold pipe 52, the vertical pipe section 512 extends into the accommodating groove 63 and is connected with the cold pipe 52, the horizontal pipe section 511 is connected with the bottom end of the vertical pipe section 512, and the plane of the horizontal pipe section 511 is perpendicular to the transverse partition plate 61 and the longitudinal partition plate 62.

In actual use, a plurality of battery cells of the battery are respectively positioned in a plurality of spaces defined by the transverse partition plates 61 and the longitudinal partition plates 62 of the grid 60 and used for placing the battery, the bottom of each battery cell or battery module is opposite to the horizontal pipe section of the heat pipe 51, and the side wall of each battery cell or battery module is opposite to the vertical pipe sections 512 of the cold pipe 52 and the heat pipe 51.

Referring to fig. 5, the number of the heat pipes 51 is plural, the number of the cold pipes 52 is one, and each of the heat pipes 51 has a substantially L shape. Therefore, the distribution of the heat pipes 51 is more uniform and reasonable, and the heat dissipation of the battery tray 100 is more uniform.

As a preferred embodiment, both the hot pipes 51 and the cold pipes 52 are flat pipes, as shown in fig. 3. Therefore, the heat exchange area of the heat pipe 51 and the cold pipe 52 is increased, the heat exchange efficiency is improved, the weight of the heat management part 50 is reduced, the occupation of the space of the battery tray 100 is reduced, and the structure of the battery tray 100 is more compact and reasonable.

In some embodiments, as shown in fig. 3 and 4, the tray body has a communication hole 33 for communicating the horizontal tube segment 511 with the outside. Specifically, the horizontal pipe segment 511 may be embedded in the communication hole 33 and communicate with the outside through the communication hole 33, the communication hole 33 extends downward from the upper surface of the tray body, and the communication hole 33 may be a through hole penetrating through the tray body or a blind hole formed in the upper surface of the tray.

Thus, the heat transfer efficiency of the heat pipe 51 is improved by providing the communication hole 33 in the tray body to expose at least a portion of the upper surface of the heat pipe 51.

Of course, the invention is not so limited and in other embodiments the tray body has a thinned portion that mates with the horizontal tube segment 511. In addition, the tray body may also have an upper protrusion that mates with the horizontal tube segment 511.

As a preferred embodiment, the top surface of the tray body has a thermal barrier coating. In particular, the thermal barrier coating may be an aerogel thermal barrier coating. Through setting up above-mentioned thermal barrier coating in order to prevent that external heat from conducting to the battery and influencing the heat of battery, the temperature that can avoid the battery simultaneously is to dispelling the heat all around along the 50 transmission in-process of thermal management portion, has improved heat conduction efficiency.

In some embodiments, the cold tube 52 has a U-shaped refrigerant circulation chamber and a refrigerant inlet 521 and a refrigerant outlet 522 at the ends of the cold tube 52. The refrigerant inlet 521 and the refrigerant outlet 522 are respectively communicated with the refrigerant circulation chamber, and the refrigerant inlet 521 and the refrigerant outlet 522 are positioned at the same end or different ends of the cold pipe 52. Therefore, the structure of the cold pipe 52 is more compact and the arrangement is more reasonable.

The end of the cold pipe 52 has a refrigerant inlet pipe and a refrigerant outlet pipe, a refrigerant inlet 521 is formed on the refrigerant inlet pipe, a refrigerant outlet 522 is formed on the refrigerant outlet pipe, and the sidewall of the battery tray has through-holes through which the refrigerant inlet pipe and the refrigerant outlet pipe protrude.

Second embodiment

In the embodiment shown in fig. 6 to 9, the thermal management part 50 includes a heat pipe 51, the partition 60 has a receiving groove 63 therein, the heat pipe 51 is at least partially located in the receiving groove 63, and the receiving groove 63 defines therein a circulation chamber communicating with the outside.

From this, realize thermal quick conduction through heat pipe 51, supply air to the circulation intracavity with the help of external cooling device simultaneously to lower the temperature to heat pipe 51, make heat pipe 51 can continuously derive the heat of battery, heat exchange efficiency is higher.

Wherein a part of the heat pipe 51 is located in the partition 60, and another part of the heat pipe 51 may be embedded in the tray body.

Specifically, as shown in fig. 6 and 7, a part of the heat pipe 51 is located in the partition 60, another part of the heat pipe 51 may be completely or partially embedded in the tray body, and a top surface of the pipe section of the heat pipe 51 embedded in the tray body may be higher than the upper surface of the tray body, may be at the same level as the upper surface of the tray body, or may be lower than the upper surface of the tray body. When the upper surface of the horizontal tube segment 511 of the heat pipe 51 is lower than the upper surface of the tray body, the battery cannot directly contact the heat pipe 51, and the heat pipe is used in cooperation with the heat conducting member to normally conduct the heat of the battery into the heat pipe 51. Specifically, the heat conducting member may be one or more of silicone, polyurethane, and epoxy resin.

In the embodiment shown in fig. 6 and 8, the partition 60 may be a grating including a diaphragm 61 and a longitudinal diaphragm 62 vertically connected to each other, the diaphragm 61 and the longitudinal diaphragm 62 being vertically connected to the tray body, and the receiving groove 63 is formed on at least one of the diaphragm 61 and the longitudinal diaphragm 62. Specifically, the transverse partition plate 61 extends in the longitudinal direction of the battery tray 100, the longitudinal partition plate 62 extends in the width direction of the battery tray 100, and the transverse partition plate 61 and the longitudinal partition plate 62 are perpendicular to each other and are connected together. The vertical connections described herein include near vertical connections.

In some embodiments, the heat pipe 51 extends longitudinally, the number of the heat pipes 51 is multiple, the plurality of heat pipes 51 are distributed transversely, the plurality of heat pipes 51 are distributed symmetrically, and the receiving groove 63 may be formed on the diaphragm 61.

In some embodiments, the heat pipe 51 includes: the vertical pipe section 512 is parallel to the transverse partition plate 61, the vertical pipe section 512 extends into the accommodating groove 63, the horizontal pipe section 511 is connected with the bottom end of the vertical pipe section 512, and the plane of the horizontal pipe section 511 is perpendicular to the transverse partition plate 61 and the longitudinal partition plate 62.

In actual use, the diaphragms 61 and the longitudinal partitions 62 of the grid 60 define a plurality of accommodation spaces for placing batteries, the bottoms of which are opposite to the horizontal sections of the heat pipes 51 and the side walls of which are opposite to the vertical sections of the heat pipes.

Referring to fig. 8, the number of the heat pipes 51 is plural, and each of the heat pipes 51 has a substantially L shape. Therefore, the distribution of the heat pipes 51 is more uniform and reasonable, and the heat dissipation of the battery tray 100 is more uniform.

As a preferred embodiment, the heat pipe 51 is a flat pipe, as shown in fig. 6. Therefore, the heat exchange area of the heat pipe 51 and the flow cavity in the accommodating groove 63 is increased, the heat exchange efficiency is improved, the weight of the heat management part 50 is reduced, the occupation of the space of the battery tray 100 is reduced, and the structure of the battery tray 100 is more compact and reasonable.

In some embodiments, as shown in fig. 7, the tray body has a communication hole 33 that communicates the heat pipe 51 with the outside. Specifically, the horizontal pipe segment 511 of the heat pipe 51 may be embedded in the communication hole 33 and communicate with the outside through the communication hole 33, the communication hole 33 extends downward from the upper surface of the tray body, and the communication hole 33 may be a through hole penetrating through the tray body or a blind hole formed on the upper surface of the tray.

Thus, the heat transfer efficiency of the heat management section 50 is improved by providing the communication holes 33 in the tray body to expose at least a portion of the upper surface of the horizontal tube segments 511 in the heat pipe 51.

Of course, the invention is not so limited and in other embodiments the tray body has a thinned portion that matches the horizontal tube segments 511 in the heat pipe 51. In addition, the tray body may also have an upper protrusion that mates with the horizontal tube segment 511 of the heat pipe 51.

As a preferred embodiment, as shown in fig. 1 and 7, the tray bottom 10 is a carbon fiber layer and/or a glass fiber layer, the tray top 30 is adapted to be stacked over the tray bottom 10 with the reinforcement 20 sandwiched between the tray bottom 10 and the tray top 30, and the tray top 30 is a carbon fiber layer and/or a glass fiber layer.

Therefore, by arranging the tray top 30 at the top and the tray bottom 10 at the bottom as carbon fiber layers, the reinforcing part 20 and the thermal management part 50 can reinforce and supplement the structural strength of the carbon fibers, so that the stress capacity and the elongation at break of the battery tray 100 in all directions are optimized and improved, and the damage to the battery tray 100 when the battery tray 100 is impacted or impacted is reduced. Thus, the battery tray 100 can be reduced in weight, and the strength of the battery tray 100 can be improved.

In addition, reinforcement portion 20 still has thermal-insulated heat insulation, the transmission between the inside and outside heat of separation, especially when the external temperature is higher than the temperature of internal battery, and battery tray can play fine thermal-insulated effect to avoid the battery high temperature.

In the particular embodiment shown in fig. 6-11, the structure of the tray top 30, tray bottom 10, and reinforcement 20 are primarily shown, with the thermal management 50 not shown.

As shown in fig. 6 and 7, according to the battery tray 100 of one embodiment of the present invention, the density of the reinforcing part 20 may be 0.01g/cm³-3g/cm³. Thus, the reinforcing portion 20 is made of the light-weight material, and does not increase the weight of the battery tray 100 too much while reinforcing and supplementing the strength of the battery tray 100.

In some embodiments, the reinforcement 20 is any one of a foam, a honeycomb, a viscose or a combination of any of several. Wherein, foaming piece is the inside structure that has irregular bubble body, and honeycomb spare is the inside type honeycomb structure that has regular and even honeycomb holes that has, and foaming piece and honeycomb spare have a large amount of commonalities, and the shape and the size of honeycomb hole of honeycomb spare are more regular orderly than the bubble body of foaming piece, and consequently the buffering of honeycomb spare is strikeed, the effect of absorbing the impact energy is better.

As a preferred embodiment, the reinforcing part 20 is a sheet-shaped foaming member, a sheet-shaped honeycomb member, or a sheet-shaped adhesive member, and a reinforcing structure (not shown in the drawings) is further disposed between the tray bottom 10 and the tray top 30, specifically, the reinforcing structure may be sandwiched between the tray bottom 10 and the tray top 30 and pass through the reinforcing part 20, one end of the reinforcing structure is connected to the tray bottom 10 and the other end of the reinforcing structure is connected to the tray top 30. Thus, the reinforcing structure further enhances the connection tightness and firmness of the tray bottom 10, the tray top 30 and the reinforcing part 20.

Wherein, the reinforcing structure can be a reinforcing column or a reinforcing rib, the reinforcing structure can be integrally formed with any one of the tray bottom 10 and the tray top 30 and bonded with the other, the upper surface of the reinforcing part 20 can be bonded with the lower surface of the tray top 30 and the lower surface of the reinforcing part 20 can be bonded with the upper surface of the tray bottom 10.

According to some embodiments of the present invention, as shown in fig. 8 and 9, the tray top 30 includes a first bottom wall 31 and a first side wall 32 protruding from the first bottom wall 31 and connected to the first bottom wall 31, the tray bottom 10 includes a second bottom wall 11 and a second side wall 12 protruding from the second bottom wall 11 and connected to the second bottom wall 11, the reinforcement part 20 is sandwiched between the first bottom wall 31 and the second bottom wall 11, and a reinforcement member (not shown in the drawings) is sandwiched between the first side wall 32 and the second side wall 12. Further, the reinforcing member is made of any one of aluminum material, aluminum alloy, magnesium material and magnesium alloy.

Thus, the reinforcing part is of a metal structure with better strength, so that enough adhesive force can be provided for the tray bottom 10, a better limiting effect can be achieved on the battery, and the battery tray 100 is prevented from being damaged by battery shaking caused by vehicle vibration; the reinforcing part 20 is any one of a blasting piece, a honeycomb piece and a viscose piece so as to ensure that the weight of the reinforcing part 20 is not too large, thereby improving the overall safety and reliability of the battery pack assembly.

As shown in fig. 8, the foaming member may be any one of a silicone foam, a polyurethane foam, a PPO foam, a PP foam, a PVC foam, and a lightweight metal foam, or a combination of any two or more of them. That is, when the reinforcing portion 20 is a foamed member, the foamed member may be made of at least one of a silicone foamed material, a polyurethane foamed material, a PPO foamed material, a PP foamed material, a PVC foamed material, and a lightweight metal foamed material. The light metal foam material may be any one of foamed aluminum or foamed magnesium.

It can be understood that the light alloy foaming material has the advantages of both the foaming material and the light alloy material, and has light weight and good strength.

According to still other embodiments of the present invention, the honeycomb member has a plurality of honeycomb holes 21, the plurality of honeycomb holes 21 are uniformly distributed on the honeycomb member, and the cross section of the honeycomb holes 21 is any one of a circle and a polygon. Specifically, the honeycomb material may have a plurality of polygonal structures or circular structures stacked, the plurality of honeycomb holes are cylindrical holes, and the plurality of honeycomb holes 21 are spaced apart and independent from each other. As shown in fig. 5, when the honeycomb holes 21 have a hexagonal cross section, the honeycomb is shaped like a honeycomb.

Further, the honeycomb member may employ any one of or a combination of any plural number of aramid type honeycomb material, phenol type honeycomb material, alloy honeycomb material, ceramic honeycomb material. That is, the honeycomb member may be any one of a nylon type honeycomb material, a phenol type honeycomb material, an alloy honeycomb material, and a ceramic honeycomb material, or may be a composite material made of any two or more of the above materials.

In some embodiments, the reinforcement portion 20 is a light alloy plate or light alloy skeleton 20 a. This can further reduce the thickness and weight of the reinforcing portion 20. In particular, the use of the light alloy frame 20a can reduce the weight of the reinforcing portion 20 while ensuring the strength of the reinforcing portion 20, and is advantageous in reducing the weight of the entire battery tray 100.

In the particular embodiment shown in fig. 11, the lightweight alloy skeleton 20a includes an annular outer skeleton 22 and an inner skeleton 23 connected within the outer skeleton 22. Alternatively, the outer frame 22 is substantially square, and the inner frame 23 includes a transverse frame and a longitudinal frame intersecting each other, both ends of the transverse frame extending to both short sides of the outer frame, respectively, and both ends of the longitudinal frame extending to both long sides of the outer frame, respectively.

Therefore, the light alloy frame 20a is shaped as described above, which not only facilitates the processing and forming, but also ensures uniform strength of each part of the battery tray 100, thereby avoiding stress concentration.

Further, the shape of the light alloy bobbin 20a is not limited to the shape shown in the drawings, and the outline shape of the outer bobbin 22 may conform to the outline shape of the battery tray 100, and accordingly, the length of the outer bobbin 22 of the light alloy bobbin 20a is also limited by the shape of the battery tray 100 where it is distributed.

In the specific embodiment shown in fig. 6 and 10, the tray top 30 includes a first bottom wall 31 and a first side wall 32 protruding from the first bottom wall 31 and connected to the first bottom wall 31, the tray bottom 10 includes a second bottom wall 11 and a second side wall 12 protruding from the second bottom wall 11 and connected to the second bottom wall 11, and a top end of the first side wall 32 is connected to a top end of the second side wall 12 so that a receiving cavity for disposing the reinforcing part 20 is defined between the tray top 30 and the tray bottom 10.

In this way, the second side wall 12 and the first side wall 32 can provide a limit for placing the battery in the battery tray 100, and effectively prevent the battery from shaking in the battery tray 100. Since the bottom wall of the battery tray 100 is used as a main load-bearing part, the reinforcing part 20 is preferably disposed opposite to the first bottom wall 31 and the second bottom wall 11, so that the battery tray 100 has a more compact structure and is more convenient to manufacture.

According to some embodiments of the present invention, the first side wall 12 or the second side wall 32 has a mounting lug c with a rigid mounting portion 40 embedded therein. Of course, the present invention is not limited thereto, and a rigid mounting portion may be provided on at least one of the tray top 30, the tray bottom 10, and the reinforcing portion 20.

In the specific embodiment shown in fig. 9, the first side wall 12 and the second side wall 32 each have a mounting lug c, and the same rigid mounting portion 40 is embedded in the two mounting lugs c which are arranged opposite to each other in the vertical direction and opposite to each other in the mounting lug c of the first side wall 32 and the mounting lug c of the second side wall 12.

Thus, the rigid mounting part 40 can reinforce the mounting lugs c and enhance the deformation resistance of the mounting lugs c, so that the rigid mounting part 40 can enhance the tightness and stability of the connection of the battery tray 100 to the vehicle body when the battery tray 100 is mounted to the vehicle body.

According to some embodiments of the present invention, the rigid mounting portion 40 is a metal mounting post, and the rigid mounting portion 40 has an axially extending mounting through hole 42. In other words, the rigid mounting portion 40 may be a metal sleeve having high rigidity and being less likely to deform. That is, the mounting lug c may have a mounting hole penetrating in the up-down direction, the rigid mounting portion 40 is embedded in the mounting hole, and an outer wall of the rigid mounting portion 40 may be interference-fitted with an inner wall of the mounting hole of the mounting lug c.

To further enhance the stability of the rigid mounting portion 40 being fixed in the mounting lug c, at least one end of the rigid mounting portion 40 has a stop flange 41 adapted to abut against an end surface of the mounting lug c. In other words, the position-limiting flange 41 may protrude out of the mounting lug c and stop against the upper end surface or the lower end surface of the mounting lug c.

The reinforcing portion 20 may have a single-layer structure or a multi-layer structure. When the reinforcing part 20 has a one-layer structure, the reinforcing part 20 may be any one of a foam, a honeycomb, and a sticker, or a combination of at least two of a foam, a honeycomb, and a sticker. When the reinforcing part 20 has a multi-layer structure, each layer part may be any one of a foam, a honeycomb and a viscose or a combination of at least two of the foam, the honeycomb and the viscose, wherein the structures of two adjacent layers may be the same or different.

When heat management structures such as heat pipes or liquid cooling pipes are provided in the battery tray, the shapes of the top and bottom of the tray can be adapted, for example, the top of the tray can be provided with holes through which the heat pipes can be exposed or the top of the tray can be provided with a plurality of protrusions to enhance the strength of the top of the tray.

The battery pack assembly according to the embodiment of the second aspect of the present invention includes: batteries and the battery tray 100 of the above embodiment. Therefore, the battery pack assembly has the advantages of light weight and high strength.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the structures or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery tray, comprising:

a tray body;

the partition is suitable for being connected with the tray body above the tray body so as to define a plurality of accommodating spaces for placing batteries with the tray body; and

a thermal management portion at least partially embedded within the divider;

the thermal management section includes:

the cold pipe is embedded in the separator; and

a heat pipe, a portion of the heat pipe being connected to the cold pipe and located within the partition;

the separator is internally provided with a containing groove which is provided with a notch, one part of the cold pipe and the heat pipe are positioned in the containing groove, and the other part of the heat pipe extends out of the notch of the containing groove;

the partition is a grating including a diaphragm and a vertical diaphragm vertically connected to each other, both the diaphragm and the vertical diaphragm are vertically connected to the tray body, and the receiving groove is formed on at least one of the diaphragm and the vertical diaphragm.

2. The battery tray of claim 1, wherein another portion of the heat pipe is embedded within the tray body or located on an upper surface of the tray body.

3. The battery tray according to claim 1, wherein the hot pipe extends in a longitudinal direction and the cold pipe extends in a transverse direction, the number of the hot pipes is plural, the plurality of the hot pipes are distributed in the transverse direction, the plurality of the hot pipes are symmetrically distributed and connected to both sides of the cold pipe, and the accommodating groove is formed on the transverse partition plate.

4. The battery tray of claim 1, wherein the heat pipe comprises:

the vertical pipe section is parallel to the cold pipe, and extends into the accommodating groove and is connected with the cold pipe; and

the horizontal pipe section is connected with the bottom end of the vertical pipe section, and the plane where the horizontal pipe section is located is perpendicular to the transverse partition plate and the longitudinal partition plate.

5. The battery tray of any of claims 2-4, wherein the cold tube and the hot tube are flat tubes.

6. The battery tray of claim 1, wherein the tray body comprises:

the bottom of the tray is a carbon fiber layer and/or a glass fiber layer;

a reinforcing part; and

a tray top adapted to be stacked above the tray bottom with the reinforcement sandwiched between the tray bottom and the tray top, the tray top being a carbon fiber layer and/or a glass fiber layer.

7. A battery pack assembly, comprising: a battery and a battery tray as claimed in any one of claims 1 to 6.