CN220172298U - Box assembly, battery and electric equipment - Google Patents

Abstract

The utility model discloses a box assembly, a battery and electric equipment, and belongs to the technical field of batteries. The box subassembly is used for holding the battery monomer, and the box subassembly includes loading board, first boundary beam and covering, and the loading board includes roof, lateral wall and turn-ups, and the roof is used for bearing the battery monomer, and the lateral wall encloses around locating the roof, and the lateral wall extends to deviating from the free direction of battery from the roof, and the turn-ups is outwards extended from the one end that the roof was kept away from to the lateral wall. The first boundary beam is connected with the flanging, and a groove is formed between the first boundary beam and the side wall. The cover covers the opening of the trench. On the one hand, when the roof coating colloid, the colloid flows into the slot, leads to the battery monomer to adhere inadequately with the roof, and the battery monomer comes unstuck and then the joint strength decline's risk. On the other hand, the risk of battery monomer damage caused by collision with the groove in the assembly process of the battery monomer and the top wall is reduced. Thereby improving the reliability of the battery cell.

Description

Box assembly, battery and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a box assembly, a battery and electric equipment.

Background

Batteries are widely used in electronic devices such as electric vehicles, electric automobiles, electric airplanes, electric ships, and the like.

How to improve the reliability of the battery cell is a problem to be solved in the battery technology.

Disclosure of Invention

In view of the above problems, the utility model provides a box assembly, a battery and electric equipment, which can improve the reliability of a battery monomer.

In a first aspect, the present utility model provides a case assembly, where the case assembly is configured to accommodate a battery cell, and the case assembly includes a carrier plate, a first side rail, and a covering element, where the carrier plate includes a top wall, a side wall, and a flange, the top wall is configured to carry the battery cell, the side wall is disposed around the top wall, the side wall extends from the top wall in a direction away from the battery cell, and the flange extends from an end of the side wall away from the top wall. The first boundary beam is connected with the flanging, and a groove is formed between the first boundary beam and the side wall. The cover covers the opening of the trench.

In the technical scheme of the embodiment of the utility model, the first side beam is connected with the flanging, and a groove is formed between the first side beam and the side wall. The cover covers the opening of the trench. By means of the design, on one hand, the risk that when the top wall is coated with colloid, the colloid flows into the groove, so that the battery monomer is not firmly adhered to the top wall, and the battery monomer is degummed and then the connection strength is reduced. On the other hand, the risk of battery monomer damage caused by collision with the groove in the assembly process of the battery monomer and the top wall is reduced. Thereby improving the reliability of the battery cell.

In some embodiments, the cover is overlapped on both sides of the top wall and the first side rail, respectively. By the design, at least part of the covering piece is positioned above the top wall and the first side beam, so that the assembling of the covering piece can be completed from top to bottom, and the assembling difficulty of the covering piece is reduced.

In some embodiments, the trench is filled with a filler. The filler can play a certain supporting role on the covering piece, so that the strength of the covering piece is improved, and the assembly stability of the battery cell is further improved.

In some embodiments, the filler is a first glue, and the cover is adhered to the first side rail and the carrier plate by the first glue. The first glue can not only play a supporting role for the covering piece, but also be used for connecting the covering piece, the side beam and the bearing plate. The assembly cost is reduced.

In some embodiments, the covering piece is an elongated plate body, the length direction of the covering piece is parallel to the length direction of the groove, and two sides of the covering piece in the width direction are respectively overlapped with the top wall and the first side beam. By the design, the design difficulty and the processing difficulty of the covering piece are reduced, and the cost is further reduced.

In some embodiments, the cover has a thickness D that satisfies: d is more than or equal to 0.1mm and less than or equal to 1mm. The thickness of the covering piece is designed in a reasonable range, so that the thickness of the covering piece is basically consistent with the thickness of the colloid coated on the top wall, the upper surface of the covering piece and the upper surface of the colloid are basically coplanar, the flatness of a bearing surface for bearing the battery cells is improved, and the risk of damaging the battery cells is reduced.

In some embodiments, the cover is an insulating material. By the design, the risk of short circuit of the battery cell is reduced. The reliability of the battery cell is improved.

In some embodiments, the flange overlaps a side of the first side rail facing away from the cover, and the flange is welded to the first side rail to form a weld. The welding seam formed by welding the flange and the first side beam can improve the tightness of the joint of the flange and the first side beam, so that the risk that water vapor or other foreign matters enter the box assembly from a gap between the flange and the first side beam to cause short circuit of the battery cell is reduced, and the reliability of the battery cell is improved.

In some embodiments, the side of the first side rail facing away from the cover is provided with a recess, and at least a portion of the flange is received in the recess. When the flanging is matched with the first side beam, the groove can play a role in pre-positioning, so that the assembly difficulty of the flanging and the groove is reduced.

In a second aspect, the present utility model provides a battery, which includes a battery cell group and the case assembly in the foregoing embodiment, where the battery cell group includes a plurality of battery cells, and the battery cell group is accommodated in the case assembly.

In some embodiments, the battery cell stack and the groove at least partially overlap as viewed in a thickness direction of the carrier plate. The battery unit group is positioned in an at least partially overlapped assembly environment of the battery unit group and the groove, and the risk of collision between the battery unit group and the groove is high. Providing a cover covering the opening of the trench may significantly reduce the above-mentioned risk.

In some embodiments, the battery cell stack is bonded to the top wall by a second glue. The second colloid can not only basically fill up the thickness difference between the top wall and the covering part, but also realize the connection between the battery cell group and the top wall. The assembly difficulty is lower, and the assembly cost is lower.

In a third aspect, the powered device includes a battery as in the previous embodiments for providing electrical energy.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the technical means thereof may be more clearly understood, and in order that the other objects, features and advantages of the present utility model may be more readily understood, the following detailed description of the utility model.

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 utility model. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the utility model;

fig. 2 is an exploded view of a battery according to some embodiments of the present utility model;

fig. 3 is an exploded view of a battery cell according to some embodiments of the present utility model;

FIG. 4 is an isometric view of a tank assembly according to some embodiments of the present utility model;

FIG. 5 is a top view of a tank assembly according to some embodiments of the utility model;

FIG. 6 is a cross-sectional view of a portion of the structure of FIG. 5 at A-A in accordance with the present utility model;

FIG. 7 is an enlarged view of a portion of the utility model at B in FIG. 6;

FIG. 8 is a cross-sectional view of a first side rail according to some embodiments of the present utility model;

fig. 9 is a cross-sectional view of a portion of the structure of a tank assembly according to some embodiments of the utility model.

Reference numerals in the specific embodiments are as follows:

1000-vehicle; 200-a controller; 300-motor; 100-cell; 11-a box body; 111-a first part; 112-a second portion; 12-battery cells; 121-a housing; 1211-end caps; 1212-a housing; 122-electrode assembly; 123-electrode terminals; 124-a swivel plate; 13-a box assembly; 131-a carrier plate; 1311-top wall; 1312-sidewalls; 1313-flanging; 132-frame; 1321-first side rail; 13211-groove; 1322-second side rail; 1323-third side rail; 133-expansion beams; 134-a cross beam; 135-cover; 136-grooves; 137-a first colloid; 138-a second colloid; 139-weld; x-a first direction; y-second direction.

Detailed Description

Embodiments of the technical scheme of the present utility model 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 utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

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 utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model 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 utility model, 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 utility model, 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 utility model. 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 utility model, 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 utility model, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element 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 utility model.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, 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 utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In the present utility model, the battery cell may include, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like. The shape of the battery cell may include, but is not limited to, a cylinder, a flat body, a rectangular parallelepiped, or other shape, etc. The battery cells may include, but are not limited to, cylindrical battery cells, prismatic battery cells, and pouch battery cells in a packaged manner.

In some high power applications, such as electric vehicles, the application of batteries includes three levels: battery cell, battery module, and battery. The battery module is formed by electrically connecting a certain number of battery cells together and putting the same into one frame in order to protect the battery cells from external impact, heat, vibration, etc. The battery refers to the final state of the battery system incorporated into the electric vehicle. Reference to a battery in accordance with an embodiment of the present utility model refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. The battery generally includes a case for enclosing one or more battery cells. The case may reduce the risk of liquids or other foreign matter affecting the charging or discharging of the battery cells.

Hereinafter, it will be mainly developed around the rectangular parallelepiped battery cells. It should be understood that the embodiments described hereinafter are also applicable in certain respects to cylindrical battery cells or pouch battery cells.

In a typical cell structure, the cell includes a housing member, an electrode assembly, and an electrolyte. The case member may be an end cap, which closes an opening of the case, to define a receiving space for receiving the electrode assembly, or may be a case.

The development of battery technology is to consider various design factors, such as cycle life, discharge capacity, energy density of the battery, and charge-discharge rate, and the reliability of the battery cells.

In some cases, the case generally includes left and right side rails, front and rear side rails, expansion beams, a bottom plate, and the like, the left and right side rails and the front and rear side rails are surrounded into a frame by riveting or welding, and the frame and the bottom plate are assembled into the case having a receiving cavity by riveting or welding, and the like. In some other cases, the bottom plate and the side beams of the box body are generally connected in a welding mode, the bottom plate is of a stamping basin-shaped structure, and grooves exist at positions where the bottom plate and the side frames overlap. When the battery monomer is assembled into the box body, the battery monomer is easy to collide with the groove, and the risk of damaging the battery monomer is high. Generally, the battery monomer can adhere to the upper surface of the bottom plate through the colloid, and a layer of colloid is coated on the upper surface of the bottom plate before the battery monomer is put into the box, and the colloid has certain fluidity, so that the probability that part of the colloid at the edge of the bottom plate flows into the groove is higher. If part of the colloid flows into the groove, the colloid amount on the upper surface of the bottom plate is insufficient, so that the bonding strength of the battery monomer and the bottom plate is reduced, and the risk of degumming the battery monomer is high. In other words, the reliability of the battery cell is poor.

In view of this, the utility model provides a box assembly for holding a battery cell, the box assembly including a carrier plate, a first side rail and a cover, the carrier plate including a top wall for carrying the battery cell, a side wall surrounding the top wall, the side wall extending from the top wall in a direction away from the battery cell, and a flange extending outwardly from an end of the side wall away from the top wall. The first boundary beam is connected with the flanging, and a groove is formed between the first boundary beam and the side wall. The cover covers the opening of the trench. The first boundary beam is connected with the flanging, and a groove is formed between the first boundary beam and the side wall. The cover covers the opening of the trench. By means of the design, on one hand, the risk that when the top wall is coated with colloid, the colloid flows into the groove, so that the battery monomer is not firmly adhered to the top wall, and the battery monomer is degummed and then the connection strength is reduced. On the other hand, the risk of battery monomer damage caused by collision with the groove in the assembly process of the battery monomer and the top wall is reduced. Thereby improving the reliability of the battery cell.

The technical scheme described by the embodiment of the utility model is suitable for battery monomers, batteries and electric equipment using the batteries.

Powered devices include, but are not limited to: battery cars, electric vehicles, ships, and spacecraft, etc., for example, spacecraft including airplanes, rockets, space shuttles, and spacecraft, etc.

For convenience of description, the following embodiments take a powered device according to an embodiment of the present utility model as an example of the vehicle 1000.

For example, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present utility model, where the vehicle 1000 may be a fuel-oil vehicle, a gas-oil vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. The motor 300, the controller 200, and the battery 100 may be provided in the vehicle 1000, and the controller 200 is used to control the battery 100 to supply power to the motor 300. For example, the battery 100 may be provided at the bottom or the head or tail of the vehicle 1000. Battery 100 may be used to power vehicle 1000, for example, battery 100 may be used as an operating power source for vehicle 1000, for circuitry of vehicle 1000, for example, for operating power requirements during start-up, navigation, and operation of vehicle 1000. In another embodiment of the present utility model, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

To meet different power requirements, the battery 100 may include a plurality of battery cells 12, where the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to a mixture of series and parallel connections. Battery 100 may also be referred to as a battery pack. Alternatively, the plurality of battery cells 12 may be connected in series or parallel or in series to form a battery module, and then connected in series or parallel or in series to form the battery 100. That is, the plurality of battery cells 12 may be directly assembled into the battery 100, or may be assembled into a battery module, and the battery module may be assembled into the battery 100.

For example, referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present utility model, and the battery 100 may include a plurality of battery cells 12. The battery 100 may further include a case 11, in which the case 11 has a hollow structure, and a plurality of battery cells 12 are accommodated in the case 11. As shown in fig. 2, referred to herein as first portion 111 and second portion 112, respectively, first portion 111 and second portion 112 snap together. The shape of the first portion 111 and the second portion 112 may be determined according to the shape of a combination of a plurality of battery cells, and each of the first portion 111 and the second portion 112 may have one opening. For example, each of the first portion 111 and the second portion 112 may be a hollow rectangular parallelepiped and each has only one surface as an open surface, the opening of the first portion 111 and the opening of the second portion 112 are disposed opposite to each other, and the first portion 111 and the second portion 112 are fastened to each other to form the case 11 having a closed chamber. The plurality of battery cells 12 are mutually connected in parallel or in series-parallel combination and then are placed in the box 11 formed by buckling the first part 111 and the second part 112.

In some embodiments, referring to fig. 2-4, the box 11 may include a box assembly 13, where the box assembly 13 may be used as the second portion 112, the box assembly 13 may include a frame 132 and a carrier plate 131, the frame 132 includes two first side beams 1321, a second side beam 1322 and a third side beam 1323, the two first side beams 1321 are spaced apart along a first direction X, and the second side beams 1322 and the third side beams 1323 are spaced apart along a second direction Y and located between the two first side beams 1321 in the first direction X. Two ends of the second side beam 1322 are respectively connected with the first ends of the two first side beams 1321, and two ends of the third side beam 1323 are respectively connected with the second ends of the two first side beams 1321, so that the two first side beams 1321, the second side beam 1322 and the third side beam 1323 enclose the frame 132. In other embodiments, the case assembly 13 may further include a plurality of expansion beams 133 spaced apart in the second direction Y, the expansion beams 133 extending in the first direction X, and two ends of the expansion beams 133 in the first direction X being connected to two first side beams 1321, respectively. The expansion beams 133 serve to resist the expansion force of the battery cell 12, and in the second direction Y, the battery cell 12 is fitted between adjacent two expansion beams 133. In other embodiments, the case assembly 13 may further include a beam 134, the beam 134 divides the case assembly 13 into a plurality of spaces for accommodating the battery cells 12, the beam 134 may extend along the first direction X, and two ends of the beam 134 in the first direction X may be connected to two first side beams 1321, respectively, and the beam 134 may serve as a middle mount beam of the case assembly 13.

In some embodiments, the case 11 may further include a mounting member, where the mounting member is used to mount the case 11 on an electric device to implement the assembly of the battery 100, and the electric device is taken as the vehicle 1000, for example, the case 11 may be mounted on a frame of the vehicle 1000. The mounting member may be a mounting sleeve, etc. The mounting members may be distributed in any area of the case 11, for example, the mounting members may be distributed in the first side beam 1321, the second side beam 1322, the third side beam 1323, the cross beam 134, and the like. The number of the mounting pieces can be arranged according to actual requirements and matched with mechanical simulation tests as required.

Referring to fig. 7, in some embodiments, the carrier plate 131 is of a stamping basin structure, the frame 132 is overlapped with the edge of the carrier plate 131, and the connection is formed at the junction between the lower surface of the frame 132 and the lower surface of the carrier plate 131 by welding, for example, friction stir welding or the like. The battery cell 12 is assembled to the upper surface of the bearing plate 131, and the bearing plate 131 provides bearing capacity to the battery cell 12. Because the carrier plate 131 is a stamping basin structure and an assembling manner of lap-joint welding, a groove 136 is formed at the lap joint of the frame 132 and the carrier plate 131.

Alternatively, the battery 100 may further include other structures, which are not described in detail herein. For example, the cell may also include a bussing member for making electrical connection between the plurality of cells 12, such as parallel or series-parallel. Specifically, the bus member may realize electrical connection between the battery cells 12 by connecting the electrode terminals 123 of the battery cells 12. Further, the bus member may be fixed to the electrode terminal 123 of the battery cell 12 by welding. The electric power of the plurality of battery cells 12 may be further led out through the case 11 by the conductive mechanism.

The number of battery cells 12 may be set to any number depending on the different power requirements. The plurality of battery cells 12 may be connected in series, parallel, or series-parallel to achieve a larger capacity or power. Since the number of battery cells 12 included in each battery 100 may be large, the battery cells 12 may be arranged in groups for easy installation, and each group of battery cells constitutes a battery module. The number of battery cells 12 included in the battery module is not limited and may be set according to requirements. The battery 100 may include a plurality of battery modules, which may be connected in series, parallel, or series-parallel.

In some embodiments, the plurality of battery cells 12 may also be assembled directly into the case 11 without forming a battery module, for example, the plurality of battery cells 12 may form a plurality of battery cell groups, the battery cell groups include a plurality of battery cells 12 arranged along the first direction X, and adjacent battery cell groups are arranged along the second direction Y.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell 12 according to some embodiments of the present utility model, the battery cell 12 including one or more electrode assemblies 122 and a housing 121. The case 121 may include a case 1212, and a plurality of walls of the case 1212, i.e., a plurality of walls of the case 121, enclose a cavity, which may be used to accommodate the electrode assembly 122. The case 1212 is determined according to the shape of the combined one or more electrode assemblies 122, for example, the case 1212 may be a hollow rectangular parallelepiped or square or regular polyhedron, and one face of the case 1212 has an opening so that one or more electrode assemblies 122 may be placed in the case 1212. The housing 1212 is filled with an electrolyte, such as an electrolyte solution.

The battery cell 12 may further include two electrode terminals 123, and the two electrode terminals 123 may be disposed on the end cap 1211. The end cap 1211 is generally in the shape of a flat plate, and two electrode terminals 123, which are positive electrode terminals 123 and negative electrode terminals 123, respectively, are fixed to the flat plate surface of the end cap 1211. Each electrode terminal 123 is provided with a corresponding one of the adapter pieces 124, which is located between the end cap 1211 and the electrode assembly 122, for electrically connecting the electrode assembly 122 and the electrode terminal 123. In the battery cell 12, the electrode assembly 122 may be provided in a single unit, or in a plurality of units, according to actual use requirements, and a plurality of independent electrode assemblies 122 are provided in the battery cell 12.

Referring to fig. 6-9, the present utility model provides a case assembly 13, where the case assembly 13 is configured to accommodate a battery cell 12, the case assembly 13 includes a carrier plate 131, a first side beam 1321 and a cover 135, the carrier plate 131 includes a top wall 1311, a side wall 1312 and a flange 1313, the top wall 1311 is configured to carry the battery cell 12, the side wall 1312 is disposed around the top wall 1311, the side wall 1312 extends from the top wall 1311 in a direction away from the battery cell 12, and the flange 1313 extends from an end of the side wall 1312 away from the top wall 1311. The first side beam 1321 is connected to the flange 1313, and a groove 136 is formed between the first side beam 1321 and the side wall 1312. Cover 135 covers the opening of trench 136.

The carrying plate 131 includes a top wall 1311, a side wall 1312, and a flange 1313, the top wall 1311 is used for carrying the battery cell 12, the side wall 1312 is enclosed around the top wall 1311, the side wall 1312 extends from the top wall 1311 towards a direction away from the battery cell 12, and the flange 1313 extends outwards from an end of the side wall 1312 away from the top wall 1311, meaning that the carrying plate 131 is of a basin structure, and the opening is away from a containing cavity for containing the battery cell 12, and an outer surface of the "basin bottom", that is, an upper surface of the top wall 1311, is connected with the battery cell 12. The basin-type structure may be formed by press forming or by machining.

In the embodiment in which the carrier plate 131 is formed in a basin-type structure by stamping, the thickness direction of the carrier plate 131 may be understood as the thickness direction of the carrier plate 131 before stamping.

The first side beam 1321 may interface with an end of the flange 1313, and at least a portion of the first side beam 1321 may also overlap a surface of the flange 1313 proximate to the top wall 1311. In embodiments where the first side beam 1321 overlaps the flange 1313, a surface of the first side beam 1321 facing away from the top wall 1311 may be coplanar with or may be offset from a surface of the flange 1313 facing away from the top wall 1311 in a thickness direction of the carrier plate 131 (which may also be understood as a thickness direction of the top wall 1311). In embodiments where the surface of the first side beam 1321 facing away from the top wall 1311 is coplanar with the surface of the flange 1313 facing away from the top wall 1311, the first side beam 1321 may be joined to the flange 1313 by friction stir welding.

The outline of the opening of the trench 136 is defined by the edges of the first side beam 1321 adjacent the side walls 1312 and the edges of the top wall 1311 adjacent the first side beam 1321. Cover 135 may be a plate or a profiled structure that is shaped to conform to the contour of the opening of channel 136. For example, cover 135 may be rectangular, polyline, or arc in shape.

Overlapping at least a portion of cover 135 with trench 136 may be referred to as cover 135 covering the opening of trench 136. At least a portion of cover 135 overlaps with groove 136, which may reduce the risk of battery cell 12 knocks as compared to embodiments of case assembly 13 where cover 135 is not provided. The collision of the battery cell 12 generally refers to that when the battery cell 12 is assembled, a part of the battery cell is sunk into the groove 136 to collide with the first side beam 1321, so that the shell 121 of the battery cell 12 is damaged or an insulating layer wrapped by the shell 121 of the battery cell 12 is damaged.

There are various ways in which cover 135 covers the opening of channel 136, in some embodiments, a portion of cover 135 may overlap first side rail 1321 and another portion of cover 135 may overlap top wall 1311 to cover the opening of channel 136. In other embodiments, the cover 135 may be positioned inside the groove 136, a surface of the cover 135 that may be in contact with the battery cell 12 (hereinafter referred to as an upper surface of the cover 135) and a surface of the top wall 1311 that may be in contact with the battery cell 12 (hereinafter referred to as an upper surface of the top wall 1311) may be coplanar, and a layer of the second gel 138 may be coated on the upper surface of the cover 135 and the upper surface of the top wall 1311 when the battery cell 12 is assembled, and the second gel 138 may have a substantially uniform size in the thickness direction of the carrier plate 131.

Referring to fig. 4 and 5, in the embodiment where the case assembly 13 further includes two expansion beams 133 and one cross beam 134, the battery cell group is disposed between the expansion beams 133 and the cross beam 134, the case assembly 13 has two sets of grooves 136, the two sets of grooves 136 are arranged at intervals along the first direction X, each set of grooves 136 includes two sections of grooves 136, the grooves 136 extend along the second direction Y, and the openings of each section of grooves 136 are covered by one elongated cover 135. In other words, the groove 136 refers to a step between the first side beam 1321 and the side wall 1312 in the case assembly 13 that may overlap the battery cell group. The step covered by the cross beam 134 and the step present in the space of the expansion beam 133 on the side facing away from the cross beam 134 in the second direction Y cannot be referred to as the above-mentioned groove 136.

In some embodiments, at least a portion of the battery cell 12 overlaps the cover 135, and the portion of the cover 135 that overlaps the battery cell 12 is generally planar.

In embodiments where the battery cells 12 are adhered to the top wall 1311 by the second gel 138, the cover 135 may be a plate, and the thickness of the plate may be adapted to the thickness of the second gel 138 so that the surface of the plate that contacts the battery cell stack and the surface of the second gel 138 that contacts the battery cell stack are substantially coplanar.

In the embodiment of the present utility model, the first side beam 1321 is connected to the flange 1313, and a groove 136 is formed between the first side beam 1321 and the side wall 1312. Cover 135 covers the opening of trench 136. Such a design, on the one hand, reduces the risk of the glue flowing into the groove 136 when the top wall 1311 is coated with glue, resulting in a weak adhesion of the battery cells 12 to the top wall 1311, and thus a reduced connection strength due to the degluing of the battery cells 12. On the other hand, the risk of damaging the battery cells 12 due to collision with the grooves 136 during assembly of the battery cells 12 with the top wall 1311 is reduced. Thereby improving the reliability of the battery cell 12.

Referring to fig. 6-9, according to some embodiments of the present utility model, two sides of cover 135 overlap top wall 1311 and first side rail 1321, respectively.

Both sides of cover 135 overlap top wall 1311 and first side rail 1321, respectively, meaning that at least a portion of cover 135 overlaps first side rail 1321 and another portion of cover 135 overlaps top wall 1311. Because of the varying morphology of cover 135, in some embodiments, portions of cover 135 may also be located inside grooves 136.

Cover 135 may be coupled to first side rail 1321 and top wall 1311 by welding, adhesive, or the like.

In some embodiments, cover 135 may be connected to first side rail 1321 and top wall 1311 by first gel 137. When the cover 135 is assembled, a certain amount of first colloid 137 may be filled in the groove 136 in advance, the cover 135 is pressed to the groove 136 from top to bottom, and the first colloid 137 may flow between the cover 135 and the first side beam 1321 and between the cover 135 and the top wall 1311 under the action of pressure, so that the assembly of the cover 135 is completed.

Both sides of cover 135 overlap top wall 1311 and first side rail 1321, respectively. By adopting the design, at least part of the cover 135 is positioned above the top wall 1311 and the first side beam 1321, so that the assembly of the cover 135 can be completed from top to bottom, and the assembly difficulty of the cover 135 is reduced.

Referring to fig. 6-9, the trench 136 is filled with a filler according to some embodiments of the present utility model.

The filler may be an object having a fixed shape such as a plastic part, a sponge, or the like. The filler may also be a fluid, such as a gel or the like.

In embodiments where the filler is a gel, it may provide some support to cover 135 after the gel has set.

The filler may provide a certain supporting effect to the cover 135, improving the strength of the cover 135, and thus improving the assembly stability of the battery cell 12.

Referring to fig. 6-9, according to some embodiments of the present utility model, the filler is a first glue 137, and the cover 135 is adhered to the first side beam 1321 and the carrier 131 by the first glue 137.

Referring to fig. 7, the grooves 136 may be pre-filled with the first glue 137, and the height of the first glue 137 may be slightly higher than the height of the top wall 1311 in the thickness direction of the carrier 131. When the cover 135 is pressed against the top wall 1311 and the first side beam 1321 from top to bottom, a portion of the first glue 137 may be pressed between the cover 135 and the first side beam 1321, and a portion of the glue may be pressed between the cover 135 and the top wall 1311, thereby improving the connection strength between the cover 135 and the top wall 1311 and the first side beam 1321.

The first glue 137 may serve both as a support for the cover 135 and for connecting the cover 135, the side rail and the carrier plate 131. The assembly cost is reduced.

The first glue 137 may be a structural glue or the like.

Referring to fig. 5-9, the cover 135 is an elongated plate, the length direction of the cover 135 is parallel to the length direction of the groove 136, and two sides of the cover 135 in the width direction overlap the top wall 1311 and the first side beam 1321, respectively.

In some embodiments, referring to fig. 5, the length direction of cover 135 is parallel to second direction Y, and the length direction of groove 136 is parallel to second direction Y. The width direction of the cover 135 is parallel to the first direction X.

The cover 135 is a strip-shaped plate, the length direction of the cover 135 is parallel to the length direction of the groove 136, and two sides of the cover 135 in the width direction are respectively overlapped with the top wall 1311 and the first side beam 1321. Such a design reduces the design difficulty and machining difficulty of cover 135, thereby reducing costs.

Referring to fig. 7, according to some embodiments of the present utility model, cover 135 has a thickness D that satisfies: d is more than or equal to 0.1mm and less than or equal to 1mm.

The thickness of cover 135 may be any value between 0.1mm and less than or equal to 1mm, for example, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm.

The thickness of the gel used for bonding the battery cells 12 is generally 0.1mm or more and 1mm or less.

The thickness of the cover 135 is designed to be within a reasonable range, so that the thickness of the cover 135 is substantially identical to the thickness of the gel coated on the top wall 1311, so that the upper surface of the cover 135 and the upper surface of the gel are substantially coplanar, improving the flatness of the bearing surface for bearing the battery cells 12, and reducing the risk of damage to the battery cells 12.

According to some embodiments of the utility model, cover 135 is an insulating material.

The material of the cover 135 may be polycarbonate, polyamide, or the like.

Cover 135 is an insulating material. Such a design reduces the risk of shorting the cells 12. The reliability of the battery cell 12 is improved.

Referring to fig. 6 and 7, according to some embodiments of the present utility model, a flange 1313 is overlapped on a side of the first side beam 1321 facing away from the cover 135, and the flange 1313 is welded to the first side beam 1321 to form a weld 139.

The weld 139 may be a weld formed by arc welding or a weld formed by friction stir welding.

A portion of the weld 139 is formed in the first side rail 1321 and another portion of the weld 139 is formed in the flange 1313.

In some embodiments, the penetration of weld 139 is greater than the thickness of flange 1313.

In some embodiments, the frame 132 is overlapped with the flange 1313, and referring to fig. 5, the first side beam 1321, the second side beam 1322 and the third side beam 1323 are overlapped with the flange 1313, and the lower surfaces of the first side beam 1321, the second side beam 1322 and the third side beam 1323 are welded to form the welding seam 139.

The welding seam 139 formed by welding the flange 1313 and the first side beam 1321 can improve the tightness of the joint of the flange 1313 and the first side beam 1321, so that the risk that water vapor or other foreign matters enter the box assembly 13 through a gap between the flange 1313 and the first side beam 1321 to cause the short circuit of the battery cell 12 is reduced, and the reliability of the battery cell 12 is improved.

Referring to fig. 7 and 8, a groove 13211 is formed on a side of the first side beam 1321 facing away from the cover 135, and at least a portion of the flange 1313 is received in the groove 13211.

The side of the first side beam 1321 facing away from the cover 135 means that the side of the first side beam 1321 facing away from the battery cell 12 in the thickness direction of the carrier plate 131.

After at least one portion of the flange 1313 is received in the recess 13211, a lower surface of the first side beam 1321 may extend beyond a surface of the flange 1313 on a side facing away from the cover 135 or may be coplanar with a surface of the flange 1313 on a side facing away from the cover 135 in a thickness direction of the carrier 131.

In some embodiments, the presence of groove 13211 steps first side rail 1321 away from cover 135. The thickness of the flange 1313 is the same as the size of the groove 13211 in the thickness direction of the carrier plate 131. In other words, the surface of the flange 1313 on the side facing away from the top wall 1311 is coplanar with the lower surface of the side sill. By the design, the welding difficulty of the first side beam 1321 and the flange 1313 is reduced, and the risk of excessive deformation of the first side beam 1321 and the flange 1313 after welding is reduced.

When the flange 1313 is matched with the first side beam 1321, the groove 13211 can play a role in pre-positioning, so that the assembling difficulty of the flange 1313 and the groove 13211 is reduced.

According to some embodiments of the present utility model, there is provided a battery 100 including a battery cell stack and a case assembly 13 as described in any of the above. The battery cell stack includes a plurality of battery cells 12, and the battery cell stack is accommodated in a case assembly 13.

According to some embodiments of the present utility model, referring to fig. 6-9, the battery cell group and the groove 136 at least partially overlap as viewed along the thickness direction of the carrier plate 131.

The energy density of the battery 100 is a design factor to be considered in the development of the battery 100 technology, and in order to increase the energy density of the battery 100, the battery cells 12 may use the internal space of the case assembly 13 as much as possible. In some cases, the battery cell stack may at least partially overlap the groove 136.

The battery cell stack is in an at least partially overlapping assembly environment of the battery cell stack and the groove 136, and the risk of collision of the battery cell stack with the groove 136 is high. Providing cover 135 to cover the opening of trench 136 may significantly reduce the above-described risk.

According to some embodiments of the utility model, the battery cell stack is bonded to the top wall 1311 by a second glue 138.

The second gel 138 may be a structural gel.

In some embodiments, the thickness of second gel 138 after solidification substantially corresponds to the thickness of cover 135.

The second gel 138 may substantially fill the thickness difference between the top wall 1311 and the cover 135, as well as enable connection of the battery cell stack to the top wall 1311. The assembly difficulty is lower, and the assembly cost is lower.

According to some embodiments of the present utility model, there is provided a powered device, including a battery 100 according to any of the above aspects, where the battery 100 is configured to provide electric energy.

According to some embodiments of the present utility model, referring to fig. 4 to 9, there is provided a case assembly 13, the case assembly 13 for receiving a battery cell 12, the case assembly 13 including a loading plate 131, a frame 132, and a cover 135, the frame 132 including two first side beams 1321, a second side beam 1322, and a third side beam 1323, the two first side beams 1321 being spaced apart in a first direction X, the second side beams 1322 and the third side beams 1323 being spaced apart in a second direction Y and being located between the two first side beams 1321 in the first direction X. Two ends of the second side beam 1322 are respectively connected with the first ends of the two first side beams 1321, and two ends of the third side beam 1323 are respectively connected with the second ends of the two first side beams 1321, so that the two first side beams 1321, the second side beam 1322 and the third side beam 1323 enclose the frame 132. The case assembly 13 further includes a plurality of expansion beams 133 and cross beams 134 arranged at intervals along the second direction Y, the expansion beams 133 extending along the first direction X, and both ends of the expansion beams 133 in the first direction X being connected to two first side beams 1321, respectively. The expansion beams 133 serve to resist the expansion force of the battery cell 12, and in the second direction Y, the battery cell 12 is fitted between adjacent two expansion beams 133. The cross beam 134 divides the case assembly 13 into two spaces for accommodating the battery cells 12, the cross beam 134 may extend along the first direction X, and both ends of the cross beam 134 in the first direction X are respectively connected with the two first side beams 1321, and the cross beam 134 may serve as a middle mount beam of the case assembly 13.

The carrier plate 131 includes a top wall 1311, a side wall 1312, and a flange 1313, the top wall 1311 is used for carrying the battery cell 12, the side wall 1312 is disposed around the top wall 1311, the side wall 1312 extends from the top wall 1311 in a direction away from the battery cell 12, and the flange 1313 extends from an end of the side wall 1312 away from the top wall 1311. The first side beam 1321 is connected to the flange 1313, and a groove 136 is formed between the first side beam 1321 and the side wall 1312. Cover 135 covers the opening of trench 136. The long strip-shaped plate body of the cover 135, the length direction of the cover 135 is parallel to the length direction of the groove 136, and two sides of the cover 135 in the width direction are respectively overlapped with the top wall 1311 and the first side beam 1321. The groove 136 is filled with a first colloid 137, the covering piece 135 is made of an insulating material, the flange 1313 is lapped on one side of the first side beam 1321, which is away from the covering piece 135, and the flange 1313 and the first side beam 1321 are welded to form a welding seam 139. The side of the first side beam 1321 facing away from the cover 135 is provided with a groove 13211, and at least a portion of the flange 1313 is accommodated in the groove 13211.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (13)

1. A housing assembly for containing a battery cell, comprising:

the bearing plate comprises a top wall, side walls and a flanging, wherein the top wall is used for bearing the battery cells, the side walls are arranged around the top wall in a surrounding mode, the side walls extend from the top wall to the direction away from the battery cells, and the flanging extends outwards from one end, away from the top wall, of the side walls;

the first side beam is connected with the flanging, and a groove is formed between the first side beam and the side wall;

and a cover covering the opening of the trench.

2. The tank assembly of claim 1 wherein both sides of the cover overlap the top wall and the first side rail, respectively.

3. The tank assembly of claim 1, wherein the groove is filled with a filler.

4. A tank assembly as claimed in claim 3, wherein the filler is a first glue, and the cover is bonded to the first side rail and the carrier plate by the first glue.

5. The tank assembly as claimed in any one of claims 1 to 4, wherein the cover is an elongated plate, a length direction of the cover is parallel to a length direction of the groove, and both sides in a width direction of the cover are respectively overlapped with the top wall and the first side rail.

6. The tank assembly of any one of claims 1-4, wherein the cover has a thickness D that satisfies: d is more than or equal to 0.1mm and less than or equal to 1mm.

7. The tank assembly of any one of claims 1-4, wherein the cover is an insulating material.

8. The tank assembly of any one of claims 1-4, wherein the flange overlaps a side of the cover on the first side Liang Beili, the flange being welded to the first side rail to form a weld.

9. The tank assembly of claim 8, wherein the first edge Liang Beili is provided with a recess on one side of the cover, and wherein at least a portion of the flange is received in the recess.

10. A battery, comprising:

a battery cell group including a plurality of battery cells;

the case assembly according to any one of claims 1 to 9, wherein the battery cell group is accommodated in the case assembly.

11. The battery of claim 10, wherein the battery cell stack and the groove at least partially overlap as viewed in a thickness direction of the carrier plate.

12. The battery of claim 10, wherein the battery cell stack is bonded to the top wall by a second glue.

13. A powered device comprising a battery as claimed in any one of claims 10-12, the battery being arranged to provide electrical energy.