CN220934272U - Lower box body, battery pack and electric equipment - Google Patents

Abstract

The application relates to the technical field of batteries, in particular to a lower box body, a battery pack and electric equipment. The lower box body comprises a heat exchange plate, a frame and sealant, wherein the frame is arranged on the heat exchange plate, and at least part of the wall surface of the frame facing the heat exchange plate is arranged at intervals with the surface of the heat exchange plate to form a containing groove; at least part of the sealant is arranged in the accommodating groove. According to the lower box body provided by the embodiment of the application, the accommodating groove is formed by arranging at least part of the wall surface of the frame facing the heat exchange plate and the surface of the heat exchange plate at intervals, and at least part of the sealant is arranged in the accommodating groove, so that the sealant can be arranged in the accommodating groove, the arrangement of the sealant is continuous and uniform, the condition that the gap between the sealing surfaces is increased due to shrinkage of the sealant is reduced, and the sealing failure probability of the sealant is reduced.

Description

Lower box body, battery pack and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a lower box body, a battery pack and electric equipment.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

The lower box of the battery pack is usually provided with a frame and a heat exchange plate, and sealing is realized by smearing sealant on the contact surface of the frame and the heat exchange plate, but the condition of sealing failure is easy to occur along with the increase of the service time of the battery pack.

Disclosure of utility model

In view of the problems, the application provides a lower box body, a battery pack and electric equipment, which solve the problem that sealing failure is easy to occur along with the increase of the service time of the battery pack.

In a first aspect of the present application, a lower case is provided, the lower case comprising:

A heat exchange plate;

the frame is arranged on the heat exchange plate, and at least part of the wall surface of the frame facing the heat exchange plate is arranged at intervals with the surface of the heat exchange plate to form a containing groove;

and the sealant is at least partially arranged in the accommodating groove.

According to the lower box body provided by the embodiment of the application, the accommodating groove is formed by arranging at least part of the wall surface of the frame facing the heat exchange plate and the surface of the heat exchange plate at intervals, and at least part of the sealant is arranged in the accommodating groove, so that the sealant can be arranged in the accommodating groove, the arrangement of the sealant is continuous and uniform, the condition that the gap between the sealing surfaces is increased due to shrinkage of the sealant is reduced, and the sealing failure probability of the sealant is reduced.

In some embodiments of the application, the frame has an enclosed region with which the receiving slot communicates. According to the embodiment of the application, the frame is provided with the enclosing area, and the containing groove is communicated with the enclosing area, so that the sealing of the enclosing area can be formed through the sealant arranged in the containing groove, and the influence of sealing failure on the battery module arranged in the enclosing area is reduced.

In some embodiments of the application, the sealant is formed as a closed annular structure overall along the edges of the enclosed area. According to the embodiment of the application, the sealant is integrally formed into the closed annular structure along the edge of the enclosing region, so that the enclosing region can be sealed from the periphery of the enclosing region through the sealant, and the influence of sealing failure on the battery module placed in the enclosing region is reduced.

In some embodiments of the application, at least another portion of the sealant is located within the enclosed region. According to the embodiment of the application, at least one other part of the sealant is positioned in the enclosing area, so that the enclosing area can be sealed by the sealant, and the influence of sealing failure on the battery module placed in the enclosing area is reduced.

In some embodiments of the present application, the surface of the sealant in the enclosed area is formed as a concave curved surface. According to the embodiment of the application, the surface of the sealant in the enclosing area is formed into the concave curved surface, so that the sealant can be respectively connected with the heat exchange plate and the frame through the concave curved surface, and a better sealing effect on the enclosing area is realized.

In some embodiments of the application, the surface of the heat exchanger plate is connected to one end of the curved surface, and the wall surface of the frame facing the enclosed area is connected to the other end of the curved surface. According to the embodiment of the application, the surface of the heat exchange plate is connected with one end of the curved surface, and the wall surface of the frame facing the enclosing area is connected with the other end of the curved surface, so that the connection between the sealant and the surface of the heat exchange plate and the connection between the sealant and the wall surface of the frame facing the enclosing area are tighter, and a better sealing effect on the enclosing area is realized.

In some embodiments of the application, the wall of the frame facing the heat exchanger plate comprises a first portion and a second portion connected to each other, wherein the first portion is arranged in contact with the surface of the heat exchanger plate and the second portion forms a recess. According to the embodiment of the application, the wall surface of the frame facing the heat exchange plate comprises the first part and the second part which are connected with each other, wherein the first part is in contact with the surface of the heat exchange plate, and the second part forms the concave part, so that sealant can be filled in a containing groove formed by the concave part and the heat exchange plate, and sealing of a surrounding area is realized.

In some embodiments of the application, the first portion has a dimension greater than a dimension of the second portion in a first direction, the first direction being a length direction of the heat exchanger plate. According to the embodiment of the application, the size of the sealant along the first direction can be reduced by making the size of the first part larger than that of the second part, so that the use amount of the sealant is reduced.

In some embodiments of the present application, the first portion and the second portion are connected by a connecting portion, wherein the first portion and the connecting portion are smoothly connected, and/or the second portion and the connecting portion are smoothly connected. According to the embodiment of the application, the first part and the second part are connected through the connecting part, and the first part and the connecting part are smoothly connected, and/or the second part and the connecting part are smoothly connected, so that the containing groove is better filled with the sealant, and the sealing effect of the sealant is improved.

In some embodiments of the application, the first part of the frame is connected to the heat exchanger plate by means of rivets. According to the embodiment of the application, the first part of the frame and the heat exchange plate are connected through rivets, so that the cost is low on one hand, and the heat exchange plate and the first part of the frame are conveniently connected in a sealing mode on the other hand.

In a second aspect of the present application, there is provided a battery pack comprising:

A battery module; and

As in the lower case of the above embodiment, the battery module is received in the enclosed region of the frame.

In a third aspect, the present application provides a powered device, comprising a battery pack as mentioned in the above embodiments, the battery pack being configured to provide electrical energy to the powered device.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 is a schematic structural diagram of a lower case according to some embodiments of the present application;

FIG. 2 is an exploded view of the lower case shown in FIG. 1;

Fig. 3 is an enlarged schematic view of the structure at a of the lower case shown in fig. 2;

FIG. 4 is a schematic cross-sectional view of the lower case shown in FIG. 1 along B-B;

fig. 5 is an enlarged structural view of the lower case at C shown in fig. 4;

FIG. 6 is a schematic view of the structure of the rim of the frame of the lower case shown in FIG. 1;

FIG. 7 is an enlarged schematic view of the structure at D of the frame shown in FIG. 6;

Fig. 8 is a schematic structural view of a battery pack according to some embodiments of the present application;

Fig. 9 is a schematic structural diagram of an electric device according to some embodiments of the present application.

The reference numerals are as follows:

100. a battery pack; 200. an electric device; 300. a controller; 400. a motor;

10. a lower box body;

11. A heat exchange plate; 111. a liquid inlet; 112. a liquid outlet;

12. A frame; 121. a frame; 1211. a bottom wall; 12111. a first portion; 12112. a second portion; 12113. a connection part; 12114. a first mounting hole; 1212. a top wall; 12121. a second mounting hole; 1213. a sidewall;

13. a receiving groove;

14. sealing glue; 141. a curved surface; 1411. one end; 1412. the other end;

15. An enclosing region;

16. A rivet;

17. a connecting piece;

20. an upper case;

30. A battery module;

X-X, first direction;

Y-Y, second direction.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In describing embodiments of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "secured" should be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the more widely the battery pack is used in view of the development of market situation. The battery pack is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, military equipment, aerospace and the like. With the continuous expansion of the application field of battery packs, the market demand of the battery packs is also continuously expanding.

The battery pack related to the embodiment of the application can be used in electric equipment such as vehicles, ships or aircrafts, but is not limited to the electric equipment. The power supply system with the electric equipment can be composed of the battery cell, the battery pack and the like.

The electric equipment using the battery pack as the power supply in the embodiment of the application can be, but is not limited to, mobile phones, flat plates, notebook computers, electric toys, electric tools, battery cars, electric automobiles, ships, spacecrafts and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

It should be understood that the technical solution described in the embodiments of the present application is not limited to the above-described battery pack and electric device, but may be applied to all batteries including a case and electric devices using the batteries.

The battery pack generally comprises a box body, a battery module is placed in the box body, the box body comprises an upper box body and a lower box body, a frame and a heat exchange plate are generally arranged on the lower box body, and sealing glue is generally smeared on the contact surface of the frame and the heat exchange plate to realize sealing, but the situation of sealing failure is easy to occur along with the increase of the service time of the battery pack.

In order to solve the problem, the embodiment of the application provides a lower box body, which comprises a heat exchange plate and a frame, wherein the frame is arranged on the heat exchange plate, at least part of the wall surface of the frame facing the heat exchange plate is arranged at intervals with the surface of the heat exchange plate to form a containing groove, and at least part of sealant is arranged in the containing groove, so that the sealant is continuously and uniformly arranged, the condition that the gap between sealing surfaces is increased due to shrinkage of the sealant is reduced, and the sealing failure probability of the sealant is reduced.

The lower box body in the embodiment of the application can be used on battery pack products, and can also be used on other products needing sealing, such as heat exchange products and the like.

The structure in the embodiment of the present application will be described in detail with reference to the accompanying drawings.

Referring to fig. 9, fig. 9 is a schematic structural diagram of an electric device according to some embodiments of the present application. The battery pack 100 is disposed inside the electric device 200, and the battery pack 100 may be disposed at the bottom or the head or the tail of the electric device 200. Battery pack 100 may be used to power powered device 200, for example, battery pack 100 may be used as an operating power source for powered device 200. Powered device 200 may also include a controller 300 and a motor 400, controller 300 being configured to control battery pack 100 to power motor 400, for example, for operating power requirements during startup, navigation, and travel of powered device 200.

In some embodiments of the present application, battery pack 100 may not only be used as an operating power source for powered device 200, but also may be used as a driving power source for powered device 200 to provide driving power for powered device 200 instead of or in part of fuel oil or natural gas.

The embodiment of the application further provides a battery pack 100, as shown in fig. 8, the battery pack 100 includes an upper case 20, a battery module 30, and a lower case, and the battery module 30 is accommodated in the enclosing region 15 of the frame 12. Wherein the frame 12 is a part of the lower case, and the battery module 30 is disposed in a space defined by the upper case 20 and the lower case.

The number of the battery modules 30 may be one or more, and the plurality of battery modules 30 may be connected in series or parallel or series-parallel, and the plurality of connected battery modules 30 may be disposed in a space between the upper case 20 and the lower case 10.

The structure of the lower case 10 in the embodiment of the present application will be described with emphasis on fig. 1 to 7.

The embodiment of the application also provides a lower box 10, as shown in fig. 1 and 2, the lower box 10 comprises a heat exchange plate 11, a frame 12 and a sealant 14, the frame 12 is arranged on the heat exchange plate 11, and at least part of the wall surface of the frame 12 facing the heat exchange plate 11 is arranged at intervals with the surface of the heat exchange plate 11 to form a containing groove 13; at least part of the sealant 14 is disposed in the receiving groove 13.

As shown in fig. 1, the heat exchange plate 11 is generally provided with a liquid inlet 111 and a liquid outlet 112 to facilitate inflow and outflow of liquid.

It should be noted that, considering that the battery pack 100 has a generally rectangular structure, the frame 12 has a rectangular structure, and four rims 121 are used to form the frame 12. While the battery pack 100 has other structures, other shapes of the frame 12 may be used, such as a circular or oval shape of the frame 12.

The sealant 14 is usually in a liquid state when applied, and is converted into a solid state after a certain period of time, and becomes a solid gel structure, thereby achieving the sealing effect.

In the lower case 10 in the embodiment of the application, the accommodating groove 13 is formed by arranging at least part of the wall surface of the frame 12 facing the heat exchange plate 11 and the surface of the heat exchange plate 11 at intervals, and at least part of the sealant 14 is arranged in the accommodating groove 13, so that the sealant 14 can be arranged in the accommodating groove 13, the arrangement of the sealant 14 is continuous and uniform, the condition that the gap between sealing surfaces is increased due to shrinkage of the sealant 14 is reduced, and the sealing failure probability of the sealant 14 is reduced.

Alternatively, as shown in fig. 1 and 2, the frame 12 has an enclosed region 15, and the receiving groove 13 communicates with the enclosed region 15.

The enclosing region 15 refers to a space for placing the battery module 30, the accommodating groove 13 is communicated with the enclosing region 15, and when the sealant 14 is arranged in the accommodating groove 13, the enclosing region 15 can be sealed.

According to the embodiment of the application, the frame 12 is provided with the enclosing region 15, and the accommodating groove 13 is communicated with the enclosing region 15, so that the sealing of the enclosing region 15 can be formed by the sealant 14 arranged in the accommodating groove 13, and the influence of sealing failure on the battery modules 30 placed in the enclosing region 15 is reduced.

Alternatively, as shown in fig. 2, the sealant 14 is formed in a closed annular structure as a whole along the edge of the enclosed region 15. The sealant 14 is formed in a rectangular annular structure, and can form a seal on the surrounding area 15 from the periphery of the surrounding area 15.

According to the embodiment of the application, the sealant 14 is integrally formed into the closed annular structure along the edge of the enclosing region 15, so that the enclosing region 15 can be sealed from the periphery of the enclosing region 15 through the sealant 14, and the influence of sealing failure on the battery modules 30 placed in the enclosing region 15 is reduced.

Optionally, at least another portion of the sealant 14 is located within the enclosed region 15. That is, a part of the sealant 14 is located in the receiving groove 13 and the other part is located in the enclosing region 15, so that the enclosing region 15 can be sealed.

By locating at least another portion of the sealant 14 within the enclosed region 15, the embodiment of the present application can achieve sealing of the enclosed region 15 by the sealant 14, reducing the impact of seal failure on the battery modules 30 placed within the enclosed region 15.

Alternatively, as shown in fig. 3 and 5, the surface of the sealant 14 located in the enclosed region 15 is formed as a concave curved surface 141.

Note that, the concave curved surface 141 mentioned here is convex toward the receiving groove 13. In the embodiment of the application, the surface of the sealant 14 in the enclosing area 15 is formed into the concave curved surface 141, so that the sealant can be respectively connected with the heat exchange plate 11 and the frame 12 through the concave curved surface 141 to realize a better sealing effect on the enclosing area 15.

Alternatively, as shown in fig. 5, the surface of the heat exchange plate 11 is connected to one end 1411 of the curved surface 141, and the wall surface of the frame 12 facing the enclosed area 15 is connected to the other end 1412 of the curved surface 141. That is, the surface of the heat exchange plate 11 is connected to the left end of the curved surface 141, and the wall surface of the frame 12 facing the enclosed area 15 is connected to the right end of the curved surface 141.

Considering that the surface of the heat exchange plate 11 is generally a horizontal plane, the wall surface of the frame 12 facing the enclosing region 15 is a vertical surface, where one end 1411 of the curved surface 141 may be tangential to the surface of the heat exchange plate 11, and the other end 1412 of the curved surface 141 may be tangential to the wall surface of the frame 12 facing the enclosing region 15, so that the sealing connection between the sealant 14 and the heat exchange plate 11 and the frame 12 may be better achieved.

According to the embodiment of the application, the surface of the heat exchange plate 11 is connected with one end 1411 of the curved surface 141, and the wall surface of the frame 12 facing the enclosing region 15 is connected with the other end 1412 of the curved surface 141, so that the connection between the sealant 14 and the surface of the heat exchange plate 11 and the wall surface of the frame 12 facing the enclosing region 15 is tighter, and a better sealing effect on the enclosing region 15 is realized.

Alternatively, as shown in fig. 5, the wall surface of the frame 12 facing the heat exchanger plate 11 comprises a first portion 12111 and a second portion 12112 connected to each other, wherein the first portion 12111 is arranged in contact with the surface of the heat exchanger plate 11 and the second portion 12112 forms a recess.

Specifically, the frame 12 includes four rims 121, and the rims 121 generally have a bottom wall 1211, side walls 1213 and a top wall 1212, wherein the number of the side walls 1213 is two, the bottom wall 1211, the side walls 1213 and the top wall 1212 enclose a rectangular cylindrical structure, and a first portion 12111, a connecting portion 12113 and a second portion 12112 mentioned herein are formed on the bottom wall 1211, and as shown in fig. 6 and 7, a first mounting hole 12114 is formed on the first portion 12111 to facilitate insertion of the rivet 16 into the first mounting hole 12114.

The number of the first mounting holes 12114 is plural here, and the plurality of first mounting holes 12114 are disposed at intervals along the length direction of the bottom wall 1211, so that the connection between the bottom wall 1211 and the bezel 121 can be achieved from the positions of the plurality of first mounting holes 12114 by the plurality of rivets 16.

Optionally, the top wall 1212 is provided with a plurality of second mounting holes 12121, and the plurality of second mounting holes 12121 are spaced along the length direction of the top wall 1212, so as to facilitate the connection between the frame 121 and the upper case 20 by using the connecting member 17, such as a bolt or a screw.

It can be appreciated that the top walls 1212 of the four rims 121 are provided with second mounting holes 12121, which facilitates the connection between the rims 121 and the upper housing 20.

Typically, the first portion 12111 and the second portion 12112 are located on the same plane, and in the present application, the second portion 12112 is formed as a recess, and the receiving groove 13 may be disposed near the enclosing region 15 and communicate with the enclosing region 15.

In the embodiment of the application, the wall surface of the frame 12 facing the heat exchange plate 11 comprises the first part 12111 and the second part 12112 which are connected with each other, wherein the first part 12111 is arranged in contact with the surface of the heat exchange plate 11, and the second part 12112 forms a concave part, so that the sealant 14 can be filled in the accommodating groove 13 surrounded by the concave part and the heat exchange plate 11, and the surrounding area 15 is sealed.

Alternatively, as shown in fig. 4 and 5, the dimension L1 of the first portion 12111 is greater than the dimension L2 of the second portion 12112 along a first direction X-X, which is the length direction of the heat exchange plate 11. Embodiments of the present application may reduce the size of the sealant 14 along the first direction X-X by making the size L1 of the first portion 12111 larger than the size L2 of the second portion 12112, thereby reducing the amount of sealant 14 used.

It should be noted that, in general, the frame 121 is generally a rectangular cylindrical structure, but in the present application, the positions of the first portion 12111 and the second portion 12112 along the second direction Y-Y are different, and the position of the first portion 12111 is lower than the position of the second portion 12112, so that the usage amount of the sealant 14 can be reduced, and the connection between the first portion 12111 and the heat exchange plate 11 can be achieved.

Alternatively, the dimension L1 of the first portion 12111 and the dimension L2 of the second portion 12112 may be the same, or the dimension L1 of the first portion 12111 may be smaller than the dimension L2 of the second portion 12112, which increases the usage amount of the sealant 14 with respect to the above-mentioned embodiment, but can also achieve the sealing effect.

Alternatively, as shown in fig. 5, the first portion 12111 and the second portion 12112 are connected by a connecting portion 12113, where the first portion 12111 is smoothly connected to the connecting portion 12113, and the second portion 12112 is smoothly connected to the connecting portion 12113.

The smooth connection can be realized through arc connection or curve connection, the sealing can be conveniently smeared into the accommodating groove 13, the generation of dead angles is reduced, the sealant of the accommodating groove 13 is increased, and a better sealing effect is realized. Compared to the vertical connection between the first portion 12111 and the connection portion 12113 and the vertical connection between the second portion 12112 and the connection portion 12113, the structure of the embodiment of the application can reduce the generation of dead angles in the receiving groove 13 and increase the sealant 14 in the receiving groove 13.

In the embodiment of the application, the first part 12111 and the second part 12112 are connected through the connecting part 12113, and the first part 12111 and the connecting part 12113 are connected smoothly, and the second part 12112 and the connecting part 12113 are connected smoothly, so that the containing groove 13 is filled with the sealant 14 better, and the sealing effect of the sealant 14 is improved.

Alternatively, as shown in fig. 5, the first portion 12111 of the frame 12 is connected to the heat exchanger plate 11 by rivets 16. The rivet 16 here may be a blind rivet, which facilitates sealing.

Embodiments of the present application facilitate a sealed connection between the heat exchanger plate 11 and the first portion 12111 of the frame 12 by connecting the first portion 12111 of the frame 12 to the heat exchanger plate 11 via rivets 16, on the one hand, at a lower cost.

It should be noted that, the surface of the cap body of the rivet 16 facing the frame 12 may be provided with sealant, so as to achieve the effect of sealing connection of the rivet 16.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

The lower case 10 in the embodiment of the application comprises a heat exchange plate 11, a frame 12 and a sealant 14, wherein the frame 12 is arranged on the heat exchange plate 11, and at least part of the wall surface of the frame 12 facing the heat exchange plate 11 is arranged at intervals with the surface of the heat exchange plate 11 to form a containing groove 13; at least part of the sealant 14 is disposed in the receiving groove 13.

Further, the frame 12 has an enclosing region 15, and the receiving groove 13 communicates with the enclosing region 15.

Further, the sealant 14 is formed integrally as a closed annular structure along the edge of the enclosed region 15.

Further, at least another portion of the sealant 14 is located within the enclosed region 15.

Further, the surface of the sealant 14 located in the enclosed region 15 is formed as a concave curved surface 141.

Further, the surface of the heat exchange plate 11 is connected to one end 1411 of the curved surface 141, and the wall surface of the frame 12 facing the enclosed area 15 is connected to the other end 1412 of the curved surface 141.

Further, the wall of the frame 12 facing the heat exchanger plate 11 comprises a first portion 12111 and a second portion 12112 connected to each other, wherein the first portion 12111 is arranged in contact with the surface of the heat exchanger plate 11 and the second portion 12112 forms a recess.

Further, the first portion 12111 has a larger dimension than the second portion 12112 in the first direction, which is the length direction of the heat exchange plate 11.

Further, the first portion 12111 and the second portion 12112 are connected by a connecting portion 12113, wherein the first portion 12111 and the connecting portion 12113 are smoothly connected, and/or the second portion 12112 and the connecting portion 12113 are smoothly connected.

Further, the first portion 12111 of the frame 12 is connected to the heat exchanger plate 11 by rivets 16.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (12)

1. Lower box, its characterized in that, lower box includes:

A heat exchange plate;

A frame which is arranged on the surface of the heat exchange plate, and at least part of the wall surface of the frame facing the heat exchange plate is provided with a concave part, and the concave part and the surface of the heat exchange plate jointly form a containing groove; and

And the sealant is at least partially filled in the accommodating groove.

2. The lower housing of claim 1, wherein the frame has an enclosed area, and the receiving slot communicates with the enclosed area.

3. The lower case of claim 2, wherein the sealant is integrally formed in a closed ring-shaped structure along an edge of the enclosed area.

4. A lower housing as claimed in claim 3, wherein at least another portion of the sealant is located within the enclosed region.

5. The lower case of claim 4, wherein a surface of the sealant in the enclosed area is formed as a concave curved surface.

6. The lower housing of claim 5, wherein said surface of said heat exchange plate is connected to one end of said curved surface, and a wall surface of said frame facing said enclosed area is connected to the other end of said curved surface.

7. A lower casing according to claim 1, wherein the wall of the frame facing the heat exchanger plate comprises a first portion and a second portion connected to each other, wherein the first portion is arranged in contact with the surface of the heat exchanger plate and the second portion forms the recess.

8. The lower case of claim 7, wherein a size of the first portion is greater than a size of the second portion in a first direction, the first direction being a length direction of the heat exchange plate.

9. The lower case according to claim 7 or 8, wherein the first portion and the second portion are connected by a connecting portion, wherein the first portion and the connecting portion are smoothly connected, and/or the second portion and the connecting portion are smoothly connected.

10. The lower housing of claim 7 or 8, wherein the first portion of the frame is connected to the heat exchange plate by rivets.

11. A battery pack, comprising:

A battery module; and

The lower case according to any one of claims 1 to 10, wherein the battery module is received in a surrounding area of the frame.

12. A powered device comprising the battery pack of claim 11, the battery pack to provide power to the powered device.