CN220324609U - Battery tray, battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery tray, a battery pack and a vehicle, wherein the battery tray is provided with a containing cavity, the containing cavity is used for containing a battery, and the battery tray comprises: a bottom wall; the side beams and the bottom wall form a containing cavity, at least one of the side beams is provided with a cavity, an energy storage part is arranged in the cavity, and the energy storage part is suitable for releasing heat when the temperature of the surface of the side beam opposite to the battery is less than or equal to a preset value. From this, through set up the energy storage spare in the boundary beam, the energy storage spare can be exothermic when the temperature of boundary beam and the relative one side surface of battery is less than or equal to the default to keep warm to the outward flange department of battery, make the battery tray can play the effect to the battery samming, improve the functionality of battery tray, and improve the life and the charge-discharge performance of battery, the boundary beam can protect the battery simultaneously, reduce the damage that the circumstances such as collision or mechanical impact caused the battery, effectively improve the security of battery.

Description

Battery tray, battery pack and vehicle

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery tray, a battery pack and a vehicle.

Background

With the development of new energy automobile technology, pure electric automobiles are increasingly used in northern cold environments. When the vehicle is kept stand for a long time in a cold environment, the power battery is used as a core component of the electric automobile, and whether the temperature of the internal battery core can be maintained in a comparatively ideal temperature range or not directly influences the chemical activity and the service life of the power battery.

In the related art, the battery tray in the battery pack is used for supporting and limiting the battery, and the battery tray can play a role in protecting the battery, however, the battery tray cannot realize the function of homogenizing the temperature of the battery, so that the temperature uniformity of the battery is poor, and the service life of the battery is influenced.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery tray, so that the battery tray can perform a function of equalizing the temperature of the battery, and the service life of the battery is prolonged.

The utility model also provides a battery pack.

The utility model further provides a vehicle.

According to the battery tray of the present utility model, the battery tray is provided with a housing chamber for housing a battery, the battery tray includes: a bottom wall; the side beams and the bottom wall form the accommodating cavity, at least one of the side beams is provided with a cavity, an energy storage part is arranged in the cavity, and the energy storage part is suitable for releasing heat when the temperature of the surface of the side beam opposite to the battery is smaller than or equal to a preset value.

According to the battery tray, the energy storage part is arranged in the boundary beam, and can release heat when the temperature of the surface of the boundary beam, which is opposite to the battery, is smaller than or equal to the preset value, so that the outer edge of the battery is insulated, the battery tray can play a role in homogenizing the temperature of the battery, the functionality of the battery tray is improved, the service life and the charge and discharge performance of the battery are improved, the boundary beam can protect the battery, damage to the battery caused by collision or mechanical impact and the like is reduced, and the safety of the battery is effectively improved.

According to some embodiments of the utility model, the plurality of cavities are arranged in sequence along the extension direction of the side beam.

According to some embodiments of the utility model, the energy storage members in the plurality of cavities are made of the same material, and the volume of the cavity on the side adjacent to the tray end is greater than the volume of the cavity on the side opposite from the tray end in the plurality of cavities.

According to some embodiments of the utility model, the plurality of cavities have the same volume, and the specific heat capacity of the energy storage member filled in the cavity on the side adjacent to the tray end is greater than the specific heat capacity of the energy storage member filled in the cavity on the side relatively far from the tray end.

According to some embodiments of the utility model, the side rail is provided with a receiving groove with one end open, and the open end of the receiving groove is provided with a sealing member for sealing the open end of the receiving groove to form the cavity.

According to some embodiments of the utility model, the receiving groove is recessed downward from an upper surface of the side rail, and forms a recessed space in a rectangular parallelepiped shape.

According to some embodiments of the present utility model, the plurality of receiving grooves are sequentially arranged in the extending direction of the side beam; the length of the accommodating groove is L, the width of the accommodating groove is W, the height of the accommodating groove is H, the length direction of the accommodating groove is identical to the extending direction of the side beam, the width direction of the accommodating groove is identical to the thickness direction of the side beam, and the height direction of the accommodating groove is identical to the height direction of the side beam.

According to some embodiments of the utility model, the height H of the plurality of receiving grooves is the same.

According to some embodiments of the utility model, at least three accommodating grooves are formed on each side beam, wherein, in the two accommodating grooves adjacently arranged, the width dimension of the accommodating groove adjacent to one side of the end of the side beam is larger than the width dimension of the other accommodating groove; and/or, in the two adjacent accommodating grooves, the length dimension of the accommodating groove adjacent to one side of the edge beam end is smaller than that of the other accommodating groove.

According to some embodiments of the utility model, the energy storage member is made of a sensible heat storage material.

According to some embodiments of the utility model, the specific heat capacity of the sensible heat storage material is not less than 1100J/(kg·deg.c).

According to some embodiments of the utility model, the energy storage element is made of a latent heat storage material.

Another object of the present utility model is to provide a battery pack.

The battery pack comprises the battery tray.

The battery pack has the same advantages as the battery tray, and is not described in detail herein.

The vehicle according to the utility model comprises the battery pack.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is an assembled schematic view of a battery and a battery tray according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a battery tray according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a schematic diagram of a second structure of a battery tray according to an embodiment of the utility model;

fig. 5 is an enlarged view at B in fig. 4.

Reference numerals:

the battery tray 100, the accommodating chamber 11, the bottom wall 12, the side beams 13, the chamber 131, the accommodating groove 132, the sealing member 133, the energy storage member 134 and the battery 200.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The following are fused as needed to be written in the writing process to explain the relevant content:

in the description of the present utility model, it should be understood that the terms "length", "width", "thickness", "upper", "inner", "outer", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, "plurality" means two or more.

A battery tray 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 5, wherein the battery tray 100 may be applied to a battery pack to support a battery 200 within the battery pack.

Referring to fig. 1, 2 and 4, according to the battery tray 100 of the present utility model, the battery tray 100 is provided with a receiving chamber 11, the receiving chamber 11 being for receiving a battery 200, the battery tray 100 comprising: the battery comprises a bottom wall 12 and a plurality of side beams 13, wherein the side beams 13 are connected end to end in sequence and form a containing cavity 11 with the bottom wall 12, at least one of the side beams 13 is provided with a cavity 131, an energy storage piece 134 is arranged in the cavity 131, and the energy storage piece 134 is suitable for releasing heat when the temperature of the surface of the side beam 13 opposite to the battery 200 is less than or equal to a preset value.

Specifically, the side beams 13 are sequentially connected in the circumferential direction of the bottom wall 12, and the side beams 13 are disposed at the peripheral edge of the bottom wall 12 and define the accommodating cavity 11 together with the bottom wall 12, the battery 200 is mounted in the accommodating cavity 11, the bottom wall 12 can be used for carrying the battery 200, the side beams 13 can limit the battery 200 in the circumferential direction of the battery 200, and stability of the battery 200 is improved.

Further, at least one of the side beams 13 is formed with a cavity 131, the energy storage element 134 is disposed in the cavity 131, the energy storage element 134 can release heat to keep the temperature of the battery 200, when the temperature of the surface of the side of the battery 200 opposite to the side beam 13 is less than or equal to a preset value (for example, the preset value may be 10 ℃), the energy storage element 134 releases heat to keep the temperature of the battery 200, so as to prevent the temperature difference between the middle part and the outer edge of the battery 200 from being large due to the too fast temperature reduction rate at the outer edge of the battery 200, and ensure the temperature uniformity of the battery 200, thereby improving the charge and discharge performance and the service life of the battery 200.

In addition, the side rail 13 protects the battery 200 in the circumferential direction, and reduces damage to the battery 200 caused by collision, mechanical impact, or the like.

Optionally, one of the plurality of side rails 13 is formed with a cavity 131 to facilitate the processing of the battery tray 100; the side beams 13 may be formed with cavities 131, and energy storage elements 134 may be disposed in each cavity 131, so as to further improve the temperature equalizing effect of the battery tray 100 on the battery 200, and improve the service life and charge and discharge performance of the battery 200.

It will be understood, of course, that the specific number of the side beams 13 may be determined according to the structure of the battery tray 100, which is not specifically limited herein, and the number of the side beams 13 provided with the cavities 131 and the arrangement positions of the cavities 131 on the side beams 13 may be designed according to the arrangement manner of the batteries 200 in the battery tray 100 and the heat preservation requirement, which is not specifically limited herein.

Therefore, the battery tray 100 of the application has the effect of homogenizing the temperature of the battery 200, the functionality of the battery tray 100 is improved, when the temperature of the position where the battery 200 and the boundary beam 13 are arranged relatively is smaller than or equal to a preset value, the energy storage piece 134 can release heat to keep the temperature of the battery 200, the temperature difference between the outer edge and the middle of the battery 200 is prevented from being too large, the temperature difference of the battery 200 is reduced, the charge and discharge performance and the service life of the battery 200 are improved, and in addition, the boundary beam 13 can protect the battery 200, and damage to the battery 200 caused by collision or mechanical impact and other conditions is reduced.

In the related art, a battery tray is used for supporting and fixing a battery, and the battery tray is generally constructed of a metal material, so that the heat conductivity coefficient of the battery tray is large, the heat insulation performance is not provided, and the heat dissipation of a part of the battery close to the battery tray is fast, so that the temperature difference between the middle part of the battery and the outer edge of the battery is large, and the service life and the charge and discharge performance of the battery are influenced.

According to the battery tray 100 provided by the utility model, the energy storage piece 134 is arranged in the boundary beam 13, and the energy storage piece 134 can release heat when the temperature of the surface of the boundary beam 13 opposite to the battery 200 is less than or equal to a preset value, so that the outer edge of the battery 200 is insulated, the battery tray 100 can play a role in homogenizing the temperature of the battery 200, the functionality of the battery tray 100 is improved, the service life and the charge and discharge performance of the battery 200 are improved, meanwhile, the boundary beam 13 can protect the battery 200, damage to the battery 200 caused by collision or mechanical impact is reduced, and the safety of the battery 200 is effectively improved.

Referring to fig. 2 and 3, in some embodiments of the present utility model, the plurality of cavities 131 is provided, and the plurality of cavities 131 are sequentially arranged in the extending direction of the side beam 13.

Specifically, the side beams 13 may be configured as a die-casting mold, and a plurality of cavities 131 sequentially arranged at intervals along the extending direction of the side beams 13 may be formed on one side beam 13, each cavity 131 is disposed corresponding to a different position of the battery 200, and an energy storage member 134 may be disposed in each cavity 131 to preserve heat of the different position of the battery 200.

Further, the extending direction of the side beam 13 may be defined as the length direction of the battery 200, the temperature of the battery 200 gradually increases from two ends of the length direction of the battery 200 toward the middle of the battery 200, and the energy storage element 134 in each cavity 131 can release energy to the battery in the corresponding area by arranging a plurality of cavities 131 on the side beam 13, so as to realize partition heat preservation of the battery 200 and improve the temperature equalizing effect of the side beam 13 to the battery 200.

Wherein, the volumes of the plurality of cavities 131 can be the same, and the heat preservation requirements of different positions of the battery 200 can be satisfied by adjusting the types of the energy storage pieces 134 or the volumes of the energy storage pieces 134; the volume of the cavity 131 may be different, and the volume of the cavity 131 may be set according to the thermal insulation requirements of different positions of the battery 200, and the energy storage element 134 is adapted to the cavity 131, so as to satisfy the thermal insulation requirements of different positions of the battery 200.

In some embodiments of the present utility model, the energy storage members 134 of the plurality of cavities 131 are made of the same material, and the width dimension of the cavity 131 on the side adjacent to the tray end is greater than the width dimension of the cavity 131 on the side opposite to the side remote from the tray end among the plurality of cavities 131.

Therefore, when the materials of the energy storage pieces 134 filled in each cavity 131 are the same, the cavity 131 can be lifted to accommodate the volume of the energy storage pieces 134 by increasing the volume of the cavity 131, and the energy storage effect of the cavity 131 is improved, so that the energy storage effect of the edge beam 13 in the area adjacent to the end part of the tray can be improved, more heat can be provided to one side of the accommodating cavity 11 in the area adjacent to the end part of the tray, and the temperature uniformity of the battery pack is improved.

In some embodiments of the present utility model, the volumes of the plurality of cavities 131 are the same, and the specific heat capacity of the energy storage 134 filled in the cavity 131 on the side adjacent to the tray end is greater than the specific heat capacity of the energy storage 134 filled in the cavity 131 on the side relatively far from the tray end among the plurality of cavities 131.

Therefore, when the volumes of the cavities 131 are the same, the energy storage effect of the edge beam 13 at the area close to the end of the tray can be improved by filling the energy storage pieces 134 made of different materials in the cavities 131, so that the area close to the end of the tray can provide more heat to one side of the accommodating cavity 11, and the temperature uniformity of the battery pack is improved.

Referring to fig. 4 and 5, in some embodiments of the present utility model, the side rail 13 is provided with a receiving groove 132 having one end opened, and the open end of the receiving groove 132 is provided with a sealing member 133, and the sealing member 133 is used to seal the open end of the receiving groove 132 to form the cavity 131.

Specifically, boundary beam 13 sets up holding tank 132, and holding tank 132 is used for holding energy storage piece 134, and energy storage piece 134 can be installed to holding tank 132 through the open end of holding tank 132 in, and sealing member 133 can be with the open end shutoff of holding tank 132, prevents that energy storage piece 134 from deviate from in holding tank 132, guarantees the assembly stability of energy storage piece 134.

Further, the sealing member 133 is in sealing fit with the accommodating groove 132 to define a cavity 131, the cavity 131 is used for setting the energy storage member 134, and when a gap is formed between the energy storage member 134 and any wall surface of the cavity 131 (i.e. a cavity structure is formed between the cavity 131 and the energy storage member 134), the cavity structure can play a role of buffering and absorbing energy, so that the anti-collision capability of the side beam 13 is further improved, and the protection effect of the side beam 13 on the battery 200 is further improved.

Alternatively, the sealing member 133 may be configured as an adhesive to seal the receiving groove 132 by potting; mechanical sealing may also be performed by means of mating a sealing ring and a fastener, and the specific configuration of the sealing member 133 may be determined in connection with actual processing, which is not particularly limited herein.

As shown in fig. 5, in some embodiments of the present utility model, the receiving groove 132 is recessed downward from the upper surface of the side sill 13, and forms a recessed space in the shape of a rectangular parallelepiped.

Specifically, the receiving groove 132 is recessed downward from the upper surface of the side rail 13 so as to facilitate the installation of the energy storage member 134 into the receiving groove 132, and the extending direction of the receiving groove 132 is the same as that of the side rail 13, so that the processing of the receiving groove 132 is facilitated, thereby improving the convenience of the assembly of the side rail 13 and the energy storage member 134, and facilitating the assembly of the battery tray 100.

The accommodating groove 132 may be configured as a concave space with a cuboid shape, so that the accommodating groove 132 is convenient to dimension, and the accommodating groove 132 is convenient to process; the receiving groove 132 may also be configured as a concave space having other shapes, such as: the configuration shape of the specific accommodating groove 132 may be determined in conjunction with actual processing, and is not particularly limited herein.

Referring to fig. 4 and 5, in some embodiments of the present utility model, the plurality of receiving grooves 132 are sequentially arranged in the extending direction of the side beam 13, wherein the length of the receiving groove 132 is L, the width of the receiving groove 132 is W, the height of the receiving groove 132 is H, the length direction of the receiving groove 132 is the same as the extending direction of the side beam 13, the width direction of the receiving groove 132 is the same as the thickness direction of the side beam 13, and the height direction of the receiving groove 132 is the same as the height direction of the side beam 13.

The longitudinal direction of the accommodating groove 132 is also the longitudinal direction of the side rail 13, the width direction of the accommodating groove 132 is also the inside-outside direction of the side rail 13, the height direction of the accommodating groove 132 is the same as the height direction of the side rail 13, and L and W in fig. 5 are given by way of example only with respect to one of the plurality of accommodating grooves 132.

Specifically, the accommodation groove 132 is configured as a concave space in a rectangular parallelepiped, and a plurality of accommodation grooves 132 may be provided on each side sill 13, the plurality of accommodation grooves 132 being sequentially arranged at intervals in the extending direction of the side sill 13.

Further, the heights H of the plurality of accommodating grooves 132 are the same, preferably, the heights H of the accommodating grooves 132 are the same as the heights of the battery 200, so that the cavity 131 and the battery 200 are fully corresponding in the height direction, thereby facilitating the full correspondence of the energy storage element 134 and the battery 200, and ensuring the heat preservation effect of the energy storage element 134 on the battery 200.

As shown in fig. 5, in some embodiments of the present utility model, at least three receiving grooves 132 are provided on each side rail 13, wherein, of the two receiving grooves 132 adjacently disposed, a width dimension of the receiving groove 132 adjacent to one end side of the side rail 13 is larger than a width dimension of the other receiving groove 132; of the two adjacently disposed receiving grooves 132, the receiving groove 132 adjacent to the end portion side of the side sill 13 has a length dimension smaller than that of the other receiving groove 132.

Specifically, the three accommodating grooves 132 are sequentially arranged in the extending direction of the side sill 13, and the widths of the three accommodating grooves 132 are sequentially reduced along the extending direction from the end of the side sill 13 in the length direction to the middle position of the side sill 13, wherein in the extending direction of the side sill 13, the energy required for the battery 200 and the side sill 13 to be presented from the middle to the two ends of the side sill 13 is increased, so when the material of the energy storage member 134 and the area opposite to the battery 200 are fixed, the volume of the accommodating groove 132 can be increased by increasing the width of the accommodating groove 132, so as to improve the energy storage effect of the accommodating groove 132.

Optionally, the length dimension of the accommodating groove 132 adjacent to the end portion of the side beam 13 is smaller than the length dimension of the accommodating groove 132 adjacent thereto, and the length of the accommodating groove 132 is designed by combining the heat dissipation characteristics of the battery 200, so that the accommodating grooves 132 are respectively arranged opposite to the corresponding areas in the battery 200, so as to partition and insulate the battery 200, and improve the heat insulation effect of the side beam 13 on the battery 200.

In addition, along the direction extending from the end of the boundary beam 13 in the length direction to the middle position of the boundary beam 13, the widths of the three accommodating grooves 132 are sequentially reduced, wherein the length dimension of the accommodating groove 132 arranged close to the end of the boundary beam 13 is the smallest, the width and the length of the accommodating groove 132 are designed by combining the heat dissipation characteristics of the battery 200 so as to respectively oppositely arrange the plurality of accommodating grooves 132 with the corresponding areas in the battery 200, when the materials constituting the energy storage elements 134 are consistent (the specific heat capacity of the energy storage elements 134 is the same) and the opposite areas of the accommodating groove 132 to the battery 200 are fixed, the size of the accommodating groove 132 can be increased by increasing the width of the accommodating groove 132, the energy storage effect of the accommodating groove 132 can be improved by increasing the volume of the accommodating element 134 in the accommodating groove 132, so as to improve the heat preservation effect of the accommodating groove 132, the temperature uniformity of the battery 200 and the service life and the charge-discharge performance of the battery 200.

It will be understood, of course, that the receiving grooves 132 may be provided with 4, 5, 6, etc., and that the number of the receiving grooves 132 may be determined in conjunction with the heat dissipation characteristics of the battery 200, and is not particularly limited herein.

In some embodiments of the present utility model, energy storage 134 is made of sensible heat storage material.

Specifically, the sensible heat storage material has a certain heat capacity, and the sensible heat storage material can release heat by its own temperature decrease without changing the morphology of the substance, for example: when the temperature of the side surface of the side beam 13 opposite to the battery 200 is equal to or less than a preset value, the temperature of the sensible heat storage material is lowered and heat is released to insulate the battery 200, reducing the temperature difference of the battery 200.

Optionally, the sensible heat storage material may be silica gel, which has elasticity, so as to realize heat preservation of the battery 200 and play a role in buffering and absorbing energy, so that the anti-collision capability of the boundary beam 13 is improved, and the protection effect of the boundary beam 13 on the battery 200 is improved; the sensible heat storage material can also be a PP (polypropylene) material, and the PP material has high-strength mechanical property, and can improve the anti-collision capability of the boundary beam 13 while playing a role in heat preservation of the battery 200, thereby improving the protection effect of the boundary beam 13 on the battery 200.

It will be understood, of course, that the sensible heat storage material may be configured in other types, not specifically limited thereto, wherein different types of sensible heat storage materials may be disposed in different receiving tanks 132 according to the thermal insulation requirements of different locations of the battery 200.

In some embodiments of the utility model, the specific heat capacity of the sensible heat storage material is not less than 1100J/(kg. Deg.C).

Specifically, the specific heat capacity of the sensible heat storage material is greater than the specific heat capacity of the electric core, so that more heat is released when the temperature of the battery 200 is reduced to be smaller, so as to meet the heat preservation requirement of the battery 200, wherein the specific heat capacity of the sensible heat storage material can be theoretically calculated and verified through actual tests according to actual conditions, and the specific heat capacity is not particularly limited herein.

In some embodiments of the present utility model, energy storage element 134 is made of a latent heat storage material.

In particular, latent heat storage materials can release heat upon a phase change, such as: when the temperature of the surface of the side beam 13 opposite to the battery 200 is less than or equal to a preset value, the latent heat storage material changes phase (e.g. changes from a liquid state or a gel state to a solid state) and releases heat to insulate the battery 200, so as to reduce the temperature difference of the battery 200, wherein the latent heat storage material can be paraffin or other materials, and different types of latent heat storage materials can be arranged in different accommodating grooves 132 according to the heat insulation requirements of different positions of the battery 200.

In addition, when the temperature of the battery is higher than the phase change temperature of the latent heat storage material, the latent heat storage material can be in a liquid state or a gel state, has high viscosity, prevents noise generated by the flowing of the latent heat storage material, can ensure that the latent heat storage material has a buffering and energy absorbing effect, and improves the anti-collision capability of the boundary beam 13.

It should be noted that, because the volume of the latent heat storage material changes after the phase change, when the volume of the latent heat storage material increases after the phase change, the pressure generated by the boundary beam 13 due to the volume increase is smaller than the yield strength of the material forming the boundary beam 13, so as to prevent the boundary beam 13 from being invalid due to the damage of the boundary beam 13 by the latent heat storage material, and meanwhile, when the latent heat storage material is converted into a solid state, the latent heat storage material can play a role of buffering and absorbing energy, and improve the anti-collision capability of the boundary beam 13.

In some embodiments of the present utility model, both latent heat storage material and sensible heat storage material may be provided in the side sill 13 and may be installed in the corresponding receiving groove 132 according to the thermal insulation requirements of different positions of the battery 200 to improve the thermal insulation effect of the battery tray 100 on the battery 200.

In some embodiments of the present utility model, an energy absorber may be further disposed in the receiving chamber 11, and the energy absorber may be disposed between the battery 200 and the side sill 13, and may be used to absorb energy generated by vibration or impact, for example: the accommodating cavity 11 can be filled with rubber, the rubber has elasticity, the buffering and energy absorbing effects can be achieved, and meanwhile, the heat dissipation of the battery 200 can be reduced, so that the battery 200 is insulated.

It will be appreciated, of course, that the energy absorber may also be disposed within the cavity 131 to absorb vibrations or energy generated by the impact within the cavity 131 to reduce damage to the battery 200 from the impact or mechanical shock.

The volumetric design of the cavity 131 of an embodiment of the present utility model is briefly described below.

Assuming that the edge beam 13 is not provided with the energy storage element 134, the average temperature of the target battery area is T1 (T1 can be obtained according to a simulation, test or experience estimation mode, etc.), and the average temperature of the target battery area needs to be increased to T2, and heat Q1 needs to be absorbed, where q1=mc1· (T2-T1), m is the mass of the target battery area, and the unit is kg; c1 is the specific heat capacity of the target cell region, and the unit is J/(kg.K). It should be noted that, the "target battery area" refers to a part of the battery 200 having a thermal insulation requirement on the battery 200.

When the energy storage member 134 is a sensible heat storage material, the volume of the cavity 131 corresponding to the target battery area isWherein C2 is the specific heat capacity of the energy storage element 134, in J/(kg.K); deltaT is the temperature drop of energy storage element 134, in K; ρ is the heat storage component density in kg/m3.

When the energy storage member 134 is a latent heat storage material, it is connected withThe volume of the cavity 131 corresponding to the target battery area isWherein r is the latent heat of phase change of the energy storage element 134, and the unit is J/kg; ρ is the heat storage component density in kg/m3.

In a further embodiment of the present utility model, by performing a simulation analysis on the battery 200 under the condition of no energy storage 134, and dividing the battery 200 near the boundary beam 13 into three battery areas according to the heat dissipation characteristics of the battery 200 obtained after the analysis, the ratio of the heat dissipation amounts per unit area of the battery areas along the direction in which the end of the boundary beam 13 in the length direction extends toward the middle position of the boundary beam 13 is 3:2:1.

accordingly, the boundary beam 13 forms three cavities 131, and when the same energy storage members 134 are disposed in the three cavities 131, the volume ratio of the three cavities 131 is 3:2:1, wherein the volume of the three cavities 131 can be adjusted by adjusting the width dimension of the cavities 131, and when the three cavities 131 are configured to have the same volume, the ratio of the heat release capacities of the energy storage members 134 in the three cavities 131 is 3:2:1.

when the energy storage element 134 is a sensible heat storage material, the heat release capacity of the energy storage element 134 can be adjusted by adjusting the specific heat capacity of the sensible heat storage material; when the energy storage element 134 is a latent heat storage material, the heat release capacity of the energy storage element 134 can be adjusted by adjusting the phase change latent heat of the latent heat storage material so as to meet the heat preservation requirement of the battery 200.

The battery pack according to the present utility model includes the above-described battery tray 100.

Because the battery package is provided with the battery tray 100, through set up energy storage piece 134 in boundary beam 13, energy storage piece 134 can be exothermic when the temperature of boundary beam 13 and the relative one side surface of battery 200 is less than or equal to the default, with the outward flange department heat preservation to battery 200, make battery tray 100 can play the effect to battery 200 samming, improve battery tray 100's functionality, and improve battery 200's life and charge-discharge performance, boundary beam 13 can protect battery 200 simultaneously, reduce the destruction that circumstances such as collision or mechanical impact led to the fact to battery 200, effectively improve battery package's security.

The vehicle comprises the battery pack, and the battery pack has good temperature equalizing effect.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. A battery tray, characterized in that the battery tray is provided with a housing chamber (11), the housing chamber (11) being for housing a battery (200), the battery tray comprising:

a bottom wall (12);

the battery comprises a plurality of side beams (13), wherein the side beams (13) and the bottom wall (12) form an accommodating cavity (11), at least one of the side beams (13) is provided with a cavity (131), an energy storage piece (134) is arranged in the cavity (131), and the energy storage piece (134) is suitable for releasing heat when the temperature of the surface of the side beam (13) opposite to the battery (200) is smaller than or equal to a preset value.

2. The battery tray according to claim 1, wherein the plurality of cavities (131) is provided, and the plurality of cavities (131) are sequentially arranged in the extending direction of the side beam (13).

3. The battery tray according to claim 2, wherein the energy storage members (134) in the plurality of cavities (131) are made of the same material, and the volume of the cavity (131) on the side close to the tray end is larger than the volume of the cavity (131) on the side away from the tray end with respect to the same in the plurality of cavities (131).

4. The battery tray according to claim 2, wherein the volumes of the plurality of cavities (131) are the same, and the specific heat capacity of the energy storage member (134) filled in the cavity (131) on the side close to the end of the tray is larger than the specific heat capacity of the energy storage member (134) filled in the cavity (131) on the side relatively far from the end of the tray among the plurality of cavities (131).

5. The battery tray according to claim 1, wherein the side rail (13) is provided with a receiving groove (132) having one end opened, and an opened end of the receiving groove (132) is provided with a sealing member (133), and the sealing member (133) is used to seal the opened end of the receiving groove (132) to form the cavity (131).

6. The battery tray according to claim 5, wherein the receiving groove (132) is recessed downward from an upper surface of the side rail (13) and forms a recessed space in a rectangular parallelepiped shape.

7. The battery tray according to claim 6, wherein the plurality of receiving grooves (132) is provided, the plurality of receiving grooves (132) being arranged in order in the extending direction of the side rail (13);

the length of the accommodating groove (132) is L, the width of the accommodating groove (132) is W, the height of the accommodating groove (132) is H, the length direction of the accommodating groove (132) is identical to the extending direction of the side beam (13), the width direction of the accommodating groove (132) is identical to the thickness direction of the side beam (13), and the height direction of the accommodating groove (132) is identical to the height direction of the side beam (13).

8. The battery tray of claim 7, wherein the heights H of the plurality of receiving grooves (132) are the same.

9. The battery tray according to claim 7, wherein at least three receiving grooves (132) are provided on each of the side rails (13), wherein,

of the two accommodation grooves (132) adjacently disposed, the width dimension of the accommodation groove (132) on the side adjacent to the tray end is larger than the width dimension of the other accommodation groove (132);

and/or, in the two receiving grooves (132) adjacently arranged, the receiving groove (132) on the side adjacent to the end of the side beam (13) has a length smaller than that of the other receiving groove (132).

10. The battery tray according to claim 1, wherein the energy storage (134) is made of a sensible heat storage material.

11. The battery tray according to claim 10, wherein the sensible heat storage material has a specific heat capacity of not less than 1100J/(kg· ℃) degrees.

12. The battery tray according to claim 1, characterized in that the energy storage (134) is made of a latent heat storage material.

13. A battery pack comprising the battery tray according to any one of claims 1 to 12.

14. A vehicle comprising the battery pack according to claim 13.