WO2019001357A1

WO2019001357A1 - Battery tray, battery pack assembly, and vehicle having same

Info

Publication number: WO2019001357A1
Application number: PCT/CN2018/092373
Authority: WO
Inventors: 沈晞; 郑卫鑫; 鲁志佩; 谭晶; 卢甲; 朱燕; 朱建华
Original assignee: 比亚迪股份有限公司
Priority date: 2017-06-30
Filing date: 2018-06-22
Publication date: 2019-01-03

Abstract

Disclosed are a battery tray and a battery pack assembly having same, the battery tray comprising: a tray body; separation parts, the separation parts being adapted to be connected to the tray body above same to define, together with the tray body, a plurality of accommodation spaces for placing batteries; and a heat management part, the heat management part being at least partly embedded into the separation parts. The battery tray according to the embodiments of the invention is not only light in weight and good in strength, but is also more uniform in heat dissipation, such as to enable each battery cell to dissipate heat sufficiently and efficiently.

Description

Battery tray, battery pack assembly, and vehicle having the same

This application is required to be submitted to the China Patent Office on June 30, 2017, the application number is 201710526278.6, the invention name is “battery tray and battery pack assembly with it”, and submitted to the Chinese Patent Office on June 30, 2017, application No. 201710526412.2, entitled "Battery Tray, Battery Pack Assembly, and Vehicles Therewith", the priority of which is incorporated herein by reference.

Technical field

The present invention relates to the field of vehicle technology, and in particular to a battery tray and a battery pack assembly having the same.

Background technique

In the related art, increasing the energy density of the battery is an important means for optimizing the power battery. There are two conventional methods for improving the energy density of the battery: one is to use a material with higher energy density; the other is through Improvements in battery construction have resulted in higher energy densities for the same battery modules. Among them, the method for improving the structure of the battery is generally light weight, compact, and particularly lightweight, and the above method can reduce the weight of the battery pack by reducing or removing part of the structural member or reducing the thickness of the material. However, it also causes a decrease in the strength of the battery pack, resulting in poor safety and reliability of the battery pack.

At the same time, due to the improvement of power battery rate, power and other requirements, thermal management of the battery during use has become a major aspect of current research and development. The current mainstream technologies include liquid cooling, air cooling, phase change cooling, etc., and most of the thermal management systems are independently installed in the battery module or the battery pack, which not only increases the design difficulty, but also is disadvantageous for the requirements of compactness and light weight.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a battery tray that is light in weight, strong in strength, and more uniform in heat dissipation and more compact in structure.

The present invention also proposes a battery pack assembly having the above battery tray.

A battery tray according to an embodiment of the first aspect of the present invention includes: a tray body; a partition adapted to be coupled to the tray body above the tray body to define a plurality of batteries for placing a battery with the tray body a receiving space; and a thermal management portion at least partially embedded in the partition.

According to the battery tray of the embodiment of the invention, the heat management unit is arranged to facilitate the management of the heat of the battery, in particular, the heat dissipation of the battery is facilitated, and the heat dissipation efficiency is improved. Further, by providing a partition for partitioning the space above the battery tray, an independent space is provided for the installation of each battery cell, and at the same time, the heat management portion is at least partially embedded in the partition member, which can not only form a heat management portion of the heat pipe. Protection, and make the overall utilization of the battery tray more reasonable and more compact.

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 portion of at least one of the cold pipe and the heat pipe being embedded in the separator.

According to the battery tray of one embodiment of the present invention, the heat management portion includes: a cold pipe embedded in the partition; and a heat pipe, a portion of the heat pipe being connected to the cold pipe and located at the Inside the divider.

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

Optionally, the partition has a receiving groove therein, the receiving groove has a notch, a part of the cold pipe and the heat pipe is located in the receiving groove, and another part of the heat pipe is from the receiving groove The notch extends.

Further, the partitioning member is a grille, and the grille includes a horizontal partition plate and a vertical partition plate which are perpendicularly connected to each other, and the horizontal partition plate and the vertical partition plate are vertically connected to the tray body, and the receiving portion is vertically connected to the tray body. A groove is formed on at least one of the diaphragm and the vertical partition.

In some embodiments, the heat pipe extends in a longitudinal direction and the cold pipe extends in a lateral direction, the number of the heat pipes is plural, and the plurality of heat pipes are distributed in a lateral direction, and the plurality of heat pipes are symmetrically distributed and connected The accommodating grooves are formed on the lateral partitions on both sides of the cold pipe.

According to the battery tray of one embodiment of the present invention, the heat management portion includes a heat pipe, the partition member has a receiving groove therein, and the heat pipe is at least partially located in the receiving groove, and the receiving groove defines a communication with the outside. Flowing chamber.

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

In some embodiments, the heat pipe includes: a vertical pipe segment parallel to the cold pipe, the vertical pipe segment extending into the receiving groove and connected to the cold pipe; and horizontal a pipe section, the horizontal pipe section being connected to a bottom end of the vertical pipe section, and a plane in which the horizontal pipe section is located is perpendicular to the transverse partition and the vertical partition.

According to some embodiments of the invention, the cold tube and the heat tube are both flat tubes.

According to one embodiment of the present invention, the tray body includes: a tray bottom, the bottom of the tray being a carbon fiber layer and/or a fiberglass layer; a reinforcing portion; and a tray top, the tray top being adapted to be stacked on The bottom of the tray is above and the reinforcing portion is sandwiched between the bottom of the tray and the top of the tray, and the top of the tray is a carbon fiber layer and/or a fiberglass layer.

A battery pack assembly according to an embodiment of the second aspect of the present invention includes: a battery and the battery tray.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic exploded view of a battery tray in accordance with a first embodiment of the present invention.

2 is a schematic view of a battery tray in accordance with a first embodiment of the present invention.

Figure 3 is a cross-sectional view showing a battery tray in accordance with a first embodiment of the present invention.

Figure 4 is a partially enlarged schematic view showing the area A of Figure 3;

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

Fig. 6 is a schematic exploded view of a battery tray according to a second embodiment of the present invention (heat management portion not shown).

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

Figure 8 is a top plan view of a battery tray in accordance with a second embodiment of the present invention (thermal management portion not shown).

Figure 9 is a cross-sectional view taken along line C-C of Figure 8.

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

Figure 11 is a schematic illustration of a battery tray (not shown in the thermal management section) in accordance with an embodiment of the present invention.

Figure 12 is a schematic cross-sectional view of a battery tray (heat management portion not shown) in accordance with an embodiment of the present invention.

Figure 13 is a partially enlarged schematic view showing the area B of Figure 12;

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

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

Reference mark:

Battery tray 100,

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

Reinforcing portion 20, lightweight alloy skeleton 20a, honeycomb hole 21, outer skeleton 22, inner skeleton 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 limiting flange 41, and a through hole 42

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

The partition member 60, the diaphragm 61, the vertical partition 62, the receiving groove 63, and the notch 631.

Detailed ways

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A battery tray 100 according to an embodiment of the present invention will be described below with reference to FIGS. 1 through 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 heat management portion 50. The partitioning member 60 is adapted to be coupled to the tray body above the tray body to define a plurality of receiving spaces for the battery to be placed with the tray body, and the heat management portion 50 is at least partially embedded in the partitioning member 60.

According to the battery tray 100 of the embodiment of the present invention, the heat management unit 50 is provided to facilitate the management of the heat of the battery, especially to facilitate heat dissipation of the battery, thereby improving heat dissipation efficiency. Further, by providing the partitioning member 60 that partitions the space above the battery tray 100, a separate space is provided for the installation of the battery, and the partitioning member 60 has a heat insulating function to enable a part of the thermal management portion embedded in the partitioning member 60. The heat insulation of the battery is 50, and the heat management portion 50 can be protected from the heat management portion 50, so that the space utilization of the battery tray 100 as a whole is more rational and the arrangement is more compact.

According to the battery tray 100 of one embodiment of the present invention, the heat management portion 50 includes at least one of the heat pipe 51 and the cold pipe 52, and at least a portion of at least one of the cold pipe 52 and the heat pipe 51 is embedded in the partition 60. The heat pipe 51 is used for accommodating the heat transfer medium, the cold pipe 52 is used for cooling, the cold pipe 52 is a pipe for circulating the refrigerant, the refrigerant medium may be liquid, air, etc., and the cooling mode is not limited to liquid cooling and air cooling. the way.

Specifically, when the heat management unit 50 includes only the heat pipe 51, the battery tray 100 discharges the heat of the battery through the heat pipe 51, and cools the heat pipe 51 by means of a cooling device provided outside the battery tray 100. When the heat management unit 50 includes only the cold pipe 52, the battery tray 100 is directly heat-exchanged with the battery through the cold pipe 52 to rapidly cool the battery. When the heat management portion 50 includes both the heat pipe 51 and the cold pipe 52, the battery tray 100 The heat of the battery is led to the cold pipe 52 through the heat pipe 51, and the heat pipe 51 is cooled and cooled by the cold pipe 52 to continuously dissipate heat from the battery tray 100. The thermal management unit 50 can directly contact the battery or indirectly contact the battery to achieve heat dissipation.

In other words, the heat management portion 50 may include only the heat pipe 51, and the heat pipe 51 may be entirely embedded in the partition member 60, or a part of the heat pipe 51 may be embedded in the partition member 60 and the other portion may protrude outside the partition member 60. In other embodiments, the thermal management unit 50 may include only the cold tube 52. The cold tube 52 may be entirely embedded in the partition 60, or a part of the cold tube 52 may be embedded in the partition 60. In addition, the heat management portion 50 may also be composed of a cold pipe 52 and a heat pipe 51. At this time, at least one of the cold pipe 52 and the heat pipe 51 may be embedded in the partition member 60, and the cold pipe 52 may be wholly or partially embedded in the partition member. Within the 60, the heat pipe 51 may also be embedded in the partition 60 in whole or in part.

First embodiment

In the specific embodiment shown in FIG. 1 and FIG. 2, the thermal management unit 50 includes a cold tube 52 and a heat pipe 51. The cold tube 52 is embedded in the partition 60. A part of the heat pipe 51 is connected to the cold pipe 52 and is located at the separation. Within 60. Thereby, the heat conduction is realized by the heat pipe 51, and the heat pipe 51 is cooled by the cold pipe 52 connected to the heat pipe 51, so that the heat pipe 51 can continuously derive 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 may be located on the upper surface of the tray body. As shown in FIG. 3 and FIG. 4, a part of the heat pipe 51 is connected to the cold pipe 52 and located in the partition 60. Another part of the heat pipe 51 may be completely or partially embedded in the tray body, and the heat pipe 51 is embedded in the tray body. The top surface of the pipe section may be higher than the upper surface of the tray body, or may be at the same level as the upper surface of the tray body, or lower than the upper surface of the tray body.

When the upper surface of the horizontal pipe section 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 is required to be used with the heat conducting member to normally conduct heat of the battery into the heat pipe 51. Specifically, the heat conductive member may be one or more of silica gel, polyurethane, and epoxy resin.

In other embodiments, the partition 60 has a receiving groove 63 therein. The receiving groove 63 has a notch 631. As shown in FIG. 2, the notch 631 is a notch provided at the edge of the side wall of the receiving groove 63, the cold pipe 52 and the heat pipe. A portion of 51 is located within the receiving groove 63 and another portion of the heat pipe 51 projects from the notch 631 of the receiving groove 63. Specifically, the cold tubes 52 are all located in the receiving slots 63 of the partitioning member 60. The tube segments of the heat pipes 51 connected to the cold tubes 52 are located in the receiving slots 63, and the other portion of the heat pipes 51 extends from the slots 631 of the receiving slots 63. Extend into the tray body.

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

In some embodiments, the heat pipe 51 extends in the lateral direction, that is, extends in the width direction of the tray body, and the cold tube 52 extends in the longitudinal direction, that is, extends along the length direction of the tray body, and the number of the heat pipes 51 is plural and the plurality of heat pipes 51 A plurality of heat pipes 51 are symmetrically distributed and connected to both sides of the cold pipe 52. The receiving groove 63 is formed on the vertical partition 62. Specifically, the vertical partition 62 may be a U-shaped member with the opening facing downward to form the receiving groove 63. The side wall edges of the receiving groove 63 have notches to form the notches 631, and the heat pipes 51 can protrude from the notches 631 on both sides.

Thus, by arranging a part of the cold pipe 52 and the heat pipe 51 in the grill 60, the cooling 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 quickly cooled.

In some embodiments, the heat pipe 51 includes a vertical pipe section 512 and a horizontal pipe section 511. The vertical pipe section 512 is parallel to the side of the cold pipe 52. The vertical pipe section 512 extends into the receiving groove 63 and is connected to the cold pipe 52. The pipe section 511 is connected to the bottom end of the vertical pipe section 512, and the horizontal pipe section 511 is located at the tray main body, and the plane of the horizontal pipe section 511 may be perpendicular to the horizontal partition 61 and the vertical partition 62. The upper ends of the vertical pipe sections 512 of the heat pipes 51 located on both sides of the diaphragms 61 may or may not be connected.

In actual use, the plurality of battery cells of the battery are respectively located in the space defined by the horizontal partition 61 and the vertical partition 62 of the grill 60 for placing the battery, and the bottom of each battery cell or battery module is The horizontal pipe section 511 of the heat pipe 51 is opposed to each other and the side wall of each battery cell or battery module is opposed to the cold pipe 52 and the vertical pipe section 512 of the heat pipe 51.

Referring to Fig. 5, the number of heat pipes 51 is plural, the number of cold pipes 52 is one, and each heat pipe 51 is substantially L-shaped. Thereby, the distribution of the respective 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 and the cold pipe 52 are both flat tubes, as shown in FIG. Thereby, not only 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 portion 50 is reduced, and the space occupied by the battery tray 100 is reduced, so that the battery tray 100 is The structure is more compact and reasonable.

In some embodiments, as shown in FIGS. 3 and 4, the tray body has a communication hole 33 that allows the horizontal pipe section 511 to communicate with the outside. Specifically, the horizontal pipe section 511 can 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 can be a through hole penetrating the tray body, or It is a blind hole formed on the upper surface of the tray.

Thereby, the heat transfer efficiency of the heat pipe 51 is improved by being provided at the communication hole 33 of the tray body to at least partially expose the upper surface of the heat pipe 51.

Of course, the invention is not limited thereto, and in other embodiments, the tray body has a thinned portion that matches the horizontal tube segment 511. In addition, the tray body may also have an upper protrusion that matches the horizontal tube section 511 to form a trough that receives the horizontal tube section 511.

As a preferred embodiment, the top surface of the tray body has a thermal barrier coating. In particular, the thermal barrier coating can be an aerogel thermal barrier coating. By providing the above thermal barrier coating to prevent external heat from being conducted to the battery and affecting the heat of the battery, it is possible to prevent the temperature of the battery from being radiated to the periphery during the transfer process of the thermal management portion 50, thereby improving heat transfer efficiency.

In some embodiments, the cold tube 52 has a U-shaped refrigerant flow chamber and a refrigerant inlet 521 and a refrigerant outlet 522 at the end of the cold tube 52. The refrigerant inlet 521 and the refrigerant outlet 522 are respectively communicated with the refrigerant flow passage, and the refrigerant inlet 521 and the refrigerant outlet 522 are located at the same end or different ends of the cold pipe 52. Thereby, 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 discharge pipe, the refrigerant inlet 521 is formed on the refrigerant inlet pipe, and the refrigerant outlet 522 is formed on the refrigerant discharge pipe, and the side wall of the battery tray has the said The refrigerant enters the through hole of the tube and the refrigerant discharge tube.

Second embodiment

In the embodiment shown in FIG. 6 to FIG. 9, the heat management unit 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. The receiving groove 63 defines a communication with the outside. The flow chamber.

Thereby, the heat is quickly transmitted through the heat pipe 51, and the air is blown into the circulation chamber by the external cooling device (the arrow in FIG. 9 shows the specific direction of the air supply) to cool the heat pipe 51 so that the heat pipe 51 can continue. The heat of the battery is derived, and the 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 FIG. 7, a part of the heat pipe 51 is located in the partition 60, and another part of the heat pipe 51 may be completely or partially embedded in the tray body, and the heat pipe 51 is embedded in the top of the pipe section of the tray body. The face may be higher than the upper surface of the tray body, or may be at the same level as the upper surface of the tray body, or lower than the upper surface of the tray body. When the upper surface of the horizontal pipe section 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 is required to be used with the heat conducting member to normally conduct heat of the battery into the heat pipe 51. Specifically, the heat conductive member may be one or more of silica gel, polyurethane, and epoxy resin.

In the embodiment shown in Figures 6 and 8, the partition member 60 may be a grille including a transverse partition 61 and a vertical partition 62 which are vertically connected to each other, and the transverse partition 61 and the longitudinal partition 62 are vertically connected at On the tray body, a receiving groove 63 is formed on at least one of the diaphragm 61 and the vertical partition 62. Specifically, the diaphragms 61 extend in the longitudinal direction of the battery tray 100, the vertical partitions 62 extend in the width direction of the battery tray 100, and the diaphragms 61 and the vertical partitions 62 are perpendicular to each other and connected to each other. The vertical connections described herein include approximately vertical connections.

In some embodiments, the heat pipe 51 extends in the longitudinal direction, the number of the heat pipes 51 is plural, and the plurality of heat pipes 51 are distributed in the lateral direction, the plurality of heat pipes 51 are symmetrically distributed, and the receiving grooves 63 may be formed on the horizontal partition plates 61.

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

In actual use, the yoke 61 and the vertical partition 62 of the grille 60 define a plurality of accommodating spaces for accommodating the battery, the bottom of the battery is opposed to the horizontal pipe section of the heat pipe 51, and the side walls of the battery and the vertical of the heat pipe The pipe segments are opposite.

Referring to Fig. 8, the number of heat pipes 51 is plural, and each heat pipe 51 is substantially L-shaped. Thereby, the distribution of the respective 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. Thereby, not only the heat exchange area of the heat transfer chamber 51 and the flow space in the accommodating groove 63 is increased, the heat exchange efficiency is improved, the weight of the heat management portion 50 is reduced, and the space occupied by the battery tray 100 is reduced, so that the battery The structure of the tray 100 is more compact and reasonable.

In some embodiments, as shown in 7, the tray body has a communication hole 33 that communicates the heat pipe 51 with the outside. Specifically, the horizontal pipe section 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 the tray body. It can also be a blind hole formed on the upper surface of the tray.

Thereby, the heat transfer efficiency of the heat management portion 50 is improved by being provided at the communication hole 33 of the tray body to at least partially expose the upper surface of the horizontal pipe section 511 in the heat pipe 51.

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

As a preferred embodiment, as shown in FIGS. 10 and 11, a battery tray 100 according to an embodiment of the present invention includes a tray bottom portion 10, a reinforcing portion 20, and a tray top portion 30. The tray bottom 10 is a carbon fiber layer and/or a fiberglass layer, the tray top 30 is adapted to be stacked over the tray bottom 10 and the reinforcement 20 is sandwiched between the tray bottom 10 and the tray top 30, the tray top 30 being a carbon fiber layer and/or Or a fiberglass layer.

That is, the battery tray 100 has a multi-layer structure with a reinforcing portion 20 interposed between the carbon fiber layer (and/or the glass fiber layer) located at the uppermost layer and the carbon fiber layer (and/or the glass fiber layer) located at the lowermost layer. .

The existing battery trays for vehicles are mostly aluminum trays, alloy trays, and composite metal trays formed by adding a small amount of carbon fiber and/or polymer materials. The weight of the battery tray is generally 50-80 kg, which seriously affects the performance of the vehicle. Because of the vibration and collision that the vehicle often encounters during use, the strength performance of the battery tray for the vehicle is demanding, and lightweight materials other than metal cannot meet the above requirements.

The inventor of the present application found in a long-term study that the carbon fiber and/or glass fiber material is made into a multi-layer structure (the top 30 of the tray and the bottom 10 of the tray) to supplement the shortage of the material itself, and to meet the strength performance of the battery tray; With regard to the overall performance of the tray, the inventors designed a reinforcing portion 20 having a high tensile strength and elongation at break between the multilayer structures formed of carbon fibers and/or glass fibers, so that the battery tray 100 is subjected to various directions and The elongation at break is optimized and improved, and the damage of the battery tray 100 when it is subjected to impact or impact is reduced, so that the weight of the carbon fiber battery tray 100 can be reduced, and the strength of the carbon fiber battery tray 100 can be improved.

When the heat management portion 50 is provided, by providing the top portion 30 of the tray at the top and the bottom portion 10 of the tray at the bottom as a carbon fiber layer, the reinforcing portion 20 and the heat management portion 50 can enhance and supplement the structural strength of the carbon fibers.

Among them, the bottom 10 of the tray mainly serves as a structural support, and the top 30 of the tray can also have an insulating sealing effect. In addition, the reinforcing portion 20 also has heat insulation to block the transfer of heat between the inside and the outside, especially when the outside temperature is higher than the temperature of the internal battery, the battery tray can have a good heat insulation effect to avoid the battery temperature. high.

In the specific embodiment shown in FIGS. 6 to 11, the structure of the tray top 30, the tray bottom 10, and the reinforcing portion 20 is mainly shown, and the heat management portion 50 is not shown in the drawing.

As shown in FIGS. 6 and 7, according to the battery tray 100 of one embodiment of the present invention, the reinforcing portion 20 may have a density of 0.01 g/cm ^{3 to 3} g/cm ³ . Thereby, the reinforcing portion 20 is made of the above-described lightweight material, and the strength of the battery tray 100 is enhanced and supplemented, and the weight of the battery tray 100 is not excessively increased.

In some embodiments, the reinforcement portion 20 is any one of a foam member, a honeycomb member, an adhesive member, or a combination of any of several. Among them, the foamed member refers to a structure having an irregular bubble inside, and the honeycomb member refers to a honeycomb-like structure having a regular and uniform honeycomb hole therein, and the foam member and the honeycomb member have a large number of commonalities, and the shape of the honeycomb hole of the honeycomb member The foam is more regular and ordered than the foamed part, so the cushioning impact of the honeycomb piece and the absorption of impact energy are better.

As a preferred embodiment, the reinforcing portion 20 is a sheet-like foaming member, a sheet-like honeycomb member or a sheet-shaped adhesive member, and a reinforcing structure (not shown) is further disposed between the tray bottom 10 and the tray top 30. The reinforcing structure may be sandwiched between the bottom 10 of the tray and the top 30 of the tray and passed through the reinforcing portion 20, one end of which is connected to the bottom 10 of the tray and the other end of which is connected to the top 30 of the tray. Thereby, the reinforcing structure further enhances the tightness and firmness of the connection of the tray bottom 10, the tray top 30, and the reinforcing portion 20.

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

According to some embodiments of the present invention, as shown in FIGS. 8 and 9, the tray top 30 includes a first bottom wall 31 and a first side wall 32 of the protruding first bottom wall 31 connected to the first bottom wall 31, the bottom of the tray The second bottom wall 11 and the second side wall 12 of the protruding second bottom wall 11 connected to the second bottom wall 11 are sandwiched between the first bottom wall 31 and the second bottom wall 11; A reinforcing member (not shown) is sandwiched between a side wall 32 and the second side wall 12. The reinforcing member may be clamped between the first side wall 32 and the second side wall 12, or may be clamped at the same time. Strong 20. Further, the reinforcing member is made of any one of aluminum, aluminum alloy, magnesium material, and magnesium alloy.

In this way, the reinforcing member is a metal structure having better strength, thereby providing sufficient adhesion to the bottom portion 10 of the tray, and capable of better limiting the battery to prevent battery slosh caused by vibration of the vehicle from damaging the battery tray 100. The reinforcing portion 20 is any one of a gun member, a honeycomb member, and an adhesive member to ensure that the weight of the reinforcing portion 20 is not too large, thereby improving the safety and reliability of the battery pack assembly as a whole.

As shown in FIG. 8, the foaming member may be any one of a silicone foaming material, a polyurethane foaming material, a PPO foaming material, a PP foaming material, a PVC foaming material, and a lightweight metal foaming material. Combination of species. That is to say, when the reinforcing portion 20 is a foaming member, the foaming member can be made of a silicone foaming material, a polyurethane foaming material, a PPO foaming material, a PP foaming material, a PVC foaming material, and a lightweight metal foaming. Made of at least one of the materials. The lightweight metal foamed material may be any of foamed aluminum or expanded magnesium.

It can be understood that the lightweight alloy foam material has the advantages of both the foaming material and the lightweight alloy material, and is not only light in weight but also good in strength.

According to still further embodiments of the present invention, the honeycomb member has a plurality of honeycomb holes 21, and the plurality of honeycomb holes 21 are evenly distributed on the honeycomb member, and the honeycomb holes 21 have a circular or polygonal cross section. Specifically, the honeycomb material may have a plurality of polygonal structures or circular structures stacked, the plurality of honeycomb holes being cylindrical holes and the plurality of honeycomb holes 21 being spaced apart from each other and independent. As shown in Fig. 14, when the honeycomb hole 21 has a hexagonal cross section, the shape of the honeycomb member is similar to that of the honeycomb.

Further, the honeycomb member may be any one or a combination of any of aramid type honeycomb material, phenolic type honeycomb material, alloy honeycomb material, ceramic honeycomb material. That is, the honeycomb member may be any one of a lenticular honeycomb material, a phenolic honeycomb material, an alloy honeycomb material, and a ceramic honeycomb material, or may be a composite material composed of any two or more of the above materials. .

In some embodiments, as shown in FIG. 15, the reinforcing portion 20 is a lightweight alloy sheet or a lightweight alloy skeleton 20a. Thereby, the thickness and weight of the reinforcing portion 20 can be further reduced. In particular, the use of the lightweight alloy skeleton 20a can reduce the weight of the reinforcing portion 20 while ensuring the strength of the reinforcing portion 20, and is advantageous in achieving weight reduction of the entire battery tray 100.

In the particular embodiment illustrated in FIG. 15, the lightweight alloy skeleton 20a includes an annular outer skeleton 22 and an inner skeleton 23 coupled within the outer skeleton 22. Optionally, the outer frame 22 is substantially square, and the inner frame 23 includes a transverse frame and a longitudinal frame that intersect each other. The two ends of the transverse frame respectively extend to two short sides of the outer frame, and the two ends of the longitudinal frame respectively extend to the outer frame. The two long sides.

Thus, the lightweight alloy skeleton 20a has the above-described shape, which is not only convenient for processing, but also has uniform strength of each portion of the battery tray 100, thereby avoiding stress concentration.

Further, the shape of the lightweight alloy skeleton 20a is not limited to the shape shown in the drawings, and the outline shape of the outer skeleton 22 may coincide with the contour shape of the battery tray 100, and accordingly, the length of the outer skeleton 22 of the lightweight alloy skeleton 20a. It is also limited by the shape of the battery tray 100 at its distribution.

In the embodiment shown in Figures 6 and 10, the tray top 30 includes a first bottom wall 31 and a first side wall 32 that projects from the first bottom wall 31 to project the first bottom wall 31. The tray bottom 10 includes a second bottom wall 11 and a second side wall 12 of the second bottom wall 11 connected to the second bottom wall 11. The top end of the first side wall 32 is connected to the top end of the second side wall 12 and the top of the tray 30 and the bottom of the tray A receiving chamber for arranging the reinforcing portion 20 is defined between 10.

Thus, the second side wall 12 and the first side wall 32 can provide a limit for the placement of the battery within the battery tray 100, effectively preventing the battery from sloshing within the battery tray 100. Since the bottom wall of the battery tray 100 serves as a main load-bearing portion, it is preferable to arrange the reinforcing portion 20 opposite to the first bottom wall 31 and the second bottom wall 11, so that the structure of the battery tray 100 is more compact and more convenient for processing and production.

According to some embodiments of the 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 embodiment shown in FIG. 13, the first side wall 12 and the second side wall 32 each have a mounting lug c, a mounting lug c of the first side wall 32 and a mounting lug c of the second side wall 12. The same rigid mounting portion 40 is embedded in the two mounting lugs c disposed opposite to each other in the up and down direction.

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

According to some embodiments of the invention, the rigid mounting portion 40 is a metal mounting post and the rigid mounting portion 40 has mounting through holes 42 that extend axially. In other words, the rigid mounting portion 40 can be a metal sleeve that is relatively rigid and is not easily deformed. That is, the mounting lug c may have a mounting hole penetrating in the up and down direction, and the rigid mounting portion 40 is embedded in the mounting hole, and the outer wall of the rigid mounting portion 40 may be interference-fitted with the inner wall of the mounting hole of the mounting lug c. .

To further enhance the stability of the rigid mounting portion 40 in the mounting lug c, at least one end of the rigid mounting portion 40 has a stop flange 41 adapted to abut against the end surface of the mounting lug c. In other words, the limit flange 41 can protrude from the mounting lug c and rest on the upper end surface or the lower end surface of the mounting lug c.

Further, the reinforcing portion 20 may have a single layer structure or a multilayer structure. When the reinforcing portion 20 is a layer structure, the reinforcing portion 20 may be any one of a foaming member, a honeycomb member, and an adhesive member, or at least two of a foaming member, a honeycomb member, and an adhesive member. The combination. When the reinforcing portion 20 is of a multi-layer structure, each layer portion may be any one of a foaming member, a honeycomb member, and an adhesive member or at least two of a foaming member, a honeycomb member, and an adhesive member. Combination, wherein the structures of two adjacent layers may be the same or different.

When a heat management structure such as a heat pipe or a liquid cooling pipe is disposed in the battery tray, the shape of the top of the tray and the bottom of the tray can be adapted to change, for example, the top of the tray can be provided with a hole for exposing the heat pipe or the top of the tray has a plurality of protrusions to enhance The strength of the top of the tray.

A battery pack assembly according to an embodiment of the second aspect of the present invention includes: a battery and the battery tray 100 of the above embodiment. Thus, 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 orientation or positional relationship of the terms "upper", "lower" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description. It is not intended to be a limitation or limitation of the invention. Furthermore, features defining "first" and "second" may include one or more of the features, either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless otherwise stated.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

A battery tray, comprising:

Tray body

a partition, the partition being placed above the tray body to be coupled to the tray body to define a plurality of receiving spaces for placing a battery with the tray body;

The thermal management unit is at least partially embedded in the partition.
The battery tray according to claim 1, wherein the heat management portion includes at least one of a heat pipe and a cold pipe, at least a portion of at least one of the cold pipe and the heat pipe being embedded in the separator Inside.
The battery tray according to claim 1, wherein the thermal management unit comprises:

a cold tube, the cold tube being embedded in the partition; and

A heat pipe, a portion of the heat pipe and the cold pipe are located in the separator for heat exchange.
The battery tray according to claim 3, wherein another portion of the heat pipe is embedded in the tray body or on an upper surface of the tray body.
The battery tray according to claim 3, wherein the partition has a receiving groove therein, the side wall of the receiving groove has a notch, and the cold pipe and a portion of the heat pipe are located in the receiving groove And another portion of the heat pipe extends from the notch of the receiving groove.
The battery tray according to claim 5, wherein said partition member is a grille, and said grille comprises a horizontal partition plate and a vertical partition plate which are vertically connected to each other, said horizontal partition plate and said vertical partition plate being vertical Attached to the tray body, the receiving groove is formed on at least one of the diaphragm and the vertical partition.
The battery tray according to claim 6, wherein the heat pipe extends in a longitudinal direction and the cold pipe extends in a lateral direction, the number of the heat pipes is plural, and the plurality of heat pipes are distributed in a lateral direction, a plurality of The heat pipes are symmetrically distributed and connected to both sides of the cold pipe, and the receiving grooves are formed on the vertical partition.
The battery tray according to claim 1, wherein the heat management portion comprises a heat pipe, the partition member has a receiving groove therein, and the heat pipe is at least partially located in the receiving groove, and the receiving groove defines the inside a circulation chamber that communicates with the outside world.
The battery tray according to claim 8, wherein a part of the heat pipe is located in the receiving groove and another portion of the heat pipe is embedded in the tray body or on an upper surface of the tray body.
The battery tray according to claim 8, wherein said partition member is a grille, and said grille comprises a horizontal partition plate and a vertical partition plate which are perpendicularly connected to each other, said horizontal partition plate and said vertical partition plate being vertical Attached to the tray body, the receiving groove is formed on at least one of the diaphragm and the vertical partition.
The battery tray according to claim 6 or 10, wherein the heat pipe comprises:

a vertical pipe section parallel to a side wall of the cold pipe, the vertical pipe section extending into the receiving groove and exchanging heat with the cold pipe;

a horizontal pipe segment connected to a bottom end of the vertical pipe segment, and a plane in which the horizontal pipe segment is located is perpendicular to the transverse partition and the vertical partition.
The battery tray according to any one of claims 3 to 11, wherein the cold pipe and the heat pipe are both flat tubes.
The battery tray according to claim 1, wherein the tray body comprises:

At the bottom of the tray, the bottom of the tray is a carbon fiber layer and/or a fiberglass layer;

Reinforcement department;

a top of the tray, the top of the tray is adapted to be stacked over the bottom of the tray and the reinforcement is sandwiched between the bottom of the tray and the top of the tray, the top of the tray being a carbon fiber layer and/or a fiberglass layer .
The battery tray according to claim 13, wherein the reinforcing portion has a density of 0.01 g/cm 3 to 3 g/cm 3 .
The battery tray according to claim 13, wherein the reinforcing portion is any one of a foaming member, a honeycomb member, and an adhesive member, or a combination of any of them.
The battery tray according to claim 15, wherein the reinforcing portion is a sheet-like foam member, a sheet-like honeycomb member or a sheet-like adhesive member, and a tray portion and a top portion of the tray are further disposed between There is a strengthening structure.
The battery tray according to claim 16, wherein said reinforcing structure is sandwiched between said bottom of said tray and said top of said absolute tray and passes through said reinforcing portion, one end of said reinforcing structure and said The bottom of the tray is connected and the other end of the reinforcing structure is connected to the top of the tray.
The battery tray according to claim 15, wherein the top of the tray includes a first bottom wall and a first side wall that is connected to the first bottom wall and protrudes from the first bottom wall; a second bottom wall and a second side wall of the second bottom wall connected to the second bottom wall, wherein the reinforcing portion is sandwiched between the first bottom wall and the second bottom wall, A reinforcing member is sandwiched between a side wall and the second side wall.
The carbon fiber battery tray according to claim 18, wherein the reinforcing member is made of any one of aluminum, aluminum alloy, magnesium material, and magnesium alloy.
The battery tray according to claim 15 or 16, wherein the foaming member is made of a silicone foaming material, a polyurethane foaming material, a PPO foaming material, a PP foaming material, a PVC foaming material, and a lightweight metal. Any one or a combination of any of a plurality of foaming materials.
The battery tray according to claim 15, wherein the honeycomb member is any one or a combination of any one of an aramid type honeycomb material, a phenol type honeycomb material, an alloy honeycomb material, and a ceramic honeycomb material.
The battery tray according to claim 13, wherein the reinforcing portion is a lightweight alloy sheet or a lightweight alloy skeleton.
The battery tray according to claim 22, wherein said lightweight alloy skeleton comprises an annular outer frame and an inner frame attached to said outer frame.
The battery tray according to claim 23, wherein said outer frame is substantially rectangular, said inner frame includes a beam and a longitudinal beam that intersect each other, and two ends of said beam extend to two of said outer frame respectively The short sides, the two ends of the longitudinal beam respectively extend to the two long sides of the outer frame.
The battery tray according to claim 13, wherein the top of the tray includes a first bottom wall and a first side wall that is connected to the first bottom wall and protrudes from the first bottom wall; a bottom wall and a second side wall of the second bottom wall connected to the second bottom wall, the top end of the first side wall is connected to the top end of the second side wall and the top of the tray is A receiving chamber for arranging the reinforcing portion is defined between the bottoms of the trays.
The battery tray according to claim 25, wherein said first side wall and/or said second side wall have mounting lugs, and said mounting lugs are embedded with rigid mounting portions.
The battery tray according to claim 25, wherein the rigid mounting portion is a metal mounting post, and the rigid mounting portion has a mounting through hole extending in the axial direction.
A battery tray according to claim 25, wherein at least one end of said rigid mounting portion has a limiting flange adapted to abut against an end surface of said mounting lug.
A battery pack assembly comprising: a battery and the battery tray of claims 1-28.
A vehicle characterized by comprising the battery pack assembly of claim 28.