CN220692183U - Battery and power utilization device with same - Google Patents

Abstract

The utility model discloses a battery and an electric device with the same, wherein the battery comprises: the box body is provided with a containing cavity, and the inner wall of the containing cavity is provided with a connecting column; the battery module is arranged in the accommodating cavity and is provided with an end plate, a through hole penetrating through the end plate along the first direction is formed in the end plate, the connecting column is matched in the through hole, and the battery module stretches into the through hole through the connecting column to be fixedly connected with the connecting column so as to be fixed in the box body. According to the battery, the connecting column is arranged in the accommodating cavity of the box body, the through holes matched with the connecting column are formed in the end plate, so that the end plate can form a complete plate surface, the battery unit can be reliably protected when the battery module is assembled with the box body, the end plate can stably and reliably inhibit the expansion of the battery unit, the possibility of collision damage and expansion deformation of the battery module is greatly reduced, the assembly of the battery module and the box body is more convenient and smooth, and the operation of the battery module is more stable and good.

Description

Battery and power utilization device with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery and an electric device with the battery.

Background

When the battery is assembled, be equipped with the boss structure in the battery box and be used for fixed end plate in the battery module for the end plate needs to set up the fixed breach of dodging of cooperation boss, and the end plate can't all cover the free terminal surface of battery in the battery module, leads to the end plate to dodge breach department unable to effectively restrain the free inflation of battery, makes the free battery in the battery module fracture in dodging breach department easily, and at the in-process that the battery module assembled the battery box, the battery module is nearer apart from boss structure, makes the free battery in the battery module bump with boss structure emergence easily, thereby leads to the battery module damage.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model aims to provide a battery which can effectively inhibit the expansion of a battery cell and reduce the possibility of damage caused by collision when a battery module is assembled into a box body.

The utility model also provides an electric device with the battery.

A battery according to a first aspect of the present utility model includes: the box body is provided with a containing cavity, and the inner wall of the containing cavity is provided with a connecting column; the battery module is arranged in the accommodating cavity and is provided with an end plate, a through hole penetrating through the end plate along a first direction is formed in the end plate, the connecting column is matched in the through hole, and the battery module stretches into the through hole through a connecting piece to be fixedly connected with the connecting column so as to be fixed on the box body.

According to the battery, the connecting column is arranged in the accommodating cavity of the box body, and the through holes for accommodating the connecting column are formed in the end plate, so that the end plate can form a complete plate surface without arranging an avoidance gap in the end plate, the end plate can reliably protect the battery cells when the battery module is assembled with the box body, the end plate can stably and reliably inhibit the expansion of the battery cells, the possibility of collision damage and expansion deformation of the battery module is greatly reduced, the assembly of the battery module and the box body is more convenient and smooth, and the operation of the battery module is more stable and good.

In some embodiments of the present utility model, the end plate includes a fixing portion extending in the first direction, the penetration hole is formed at the fixing portion and penetrates the fixing portion in the first direction, and the fixing portion extends toward an end of one end of the connection post to an end face of a battery cell of the battery module in the first direction.

In this embodiment, the fixing portion extends to the free terminal surface of battery towards the tip of the one end of spliced pole, can make the fixing portion of end plate protect the free battery all the time in the extension scope of end plate along first direction, and the fixing portion can separate spliced pole and free battery reliably to the free condition of damaging that bumps into of battery when greatly reduced assembles, after the fixing portion is fixed with the spliced pole assembly, the fixing portion can restrain free inflation of battery better, makes the operation of battery module more stable good.

In one embodiment of the utility model, the end plate further comprises a plate body, the fixing portion being connected to at least one side of the plate body in a second direction perpendicular to the first direction, wherein in the first direction, an end of the fixing portion facing the connection post is flush with an end of the plate body facing the connection post.

In this embodiment, the end plate sets up the board main part and covers in the single one side surface of the direction of range of stacking of battery jointly with the fixed part, protects the battery monomer in the range of extension of second direction and first direction, makes the end plate can play the effect of protection to the battery monomer well, simple structure, convenient assembling.

In some examples of the present utility model, the plate body may have weight reducing holes formed therein, the weight reducing holes extending in the first direction, one or more of the weight reducing holes being spaced apart from each other in the second direction.

The lightening holes are formed in the plate main body, so that the weight of the plate main body can be reduced, the end plate is lighter, the end plate is convenient to assemble in the battery module, the weight energy density of the battery is improved, and the lightening requirement of the battery is met.

In some embodiments of the present utility model, a side surface of the end plate facing the battery cells of the battery module is a first surface, and a minimum distance between an inner wall of the penetration hole and the first surface in a thickness direction of the end plate is 2.5mm to 3mm.

The minimum distance between the inner wall of the perforation and the first surface is limited between 2.5mm and 3mm, so that the perforation position of the end plate has enough structural strength towards one side of the battery cell to bear the pressure on the end plate when the battery cell expands, the fixing part of the end plate can stably and reliably inhibit the expansion of the battery cell, and the end plate and the box body can keep a stable and good structural state after being assembled, so that the battery is more stable in the use process.

In some embodiments of the present utility model, the end plate is provided with a plurality of through holes arranged at intervals, the number of the connecting columns is a plurality, and the connecting columns are in one-to-one correspondence with the plurality of through holes.

In this embodiment, set up a plurality of perforation and a plurality of spliced pole one-to-one of interval arrangement on the end plate, can make the end plate fix with the box connection when fixing, fix more conveniently, fixed more firm and reliable.

In some embodiments of the present utility model, the connecting post is formed with a connecting hole, the connecting piece is a bolt, and one end of the connecting piece extends into the connecting hole and is fixedly connected with the connecting post.

In this embodiment, be formed with on the spliced pole with bolt complex connecting hole, fix the end plate in the box through the bolt, simple structure, fixed firm, it is convenient to dismantle.

In one embodiment of the present utility model, a ratio of a length of the connecting post extending into the through hole to a diameter of the connecting member is 2 or more; and/or the ratio of the length of the connecting piece extending into the connecting hole to the diameter of the connecting piece is greater than or equal to 1.5.

In this embodiment, the ratio of the length of the connecting post extending into the through hole to the diameter of the connecting piece is defined to be greater than or equal to 2, and the ratio of the length of the connecting piece extending into the connecting hole to the diameter of the connecting piece is defined to be greater than or equal to 1.5, so that the connecting piece and the connecting post can be reliably and stably connected in the through hole, thereby the end plate can be stably and firmly assembled and fixed with the box body, further the end plate can better inhibit the expansion of the battery cell, and the battery can be more stably operated.

In one embodiment of the present utility model, a ratio of a length of the connecting post extending into the through hole to a diameter of the connecting member is 3 or more; and/or the ratio of the length of the connecting piece extending into the connecting hole to the diameter of the connecting piece is more than or equal to 2.

In this embodiment, the ratio of the length of the connecting post extending into the through hole to the diameter of the connecting piece is further limited to be greater than or equal to 3, the ratio of the length of the connecting post extending into the connecting hole to the diameter of the connecting piece is further limited to be greater than or equal to 2, when the end plate is assembled and fixed with the box body, the connecting piece is connected with the connecting post more firmly, the overall structural strength of the connecting piece and the connecting post after being connected and fixed is higher, so that the end plate and the box body are fixed more stably and firmly, and the fixing part of the end plate can better inhibit the deformation and expansion of the battery monomer under the action of structural reinforcement of the connecting piece and the connecting post, so that the battery is more stable during operation.

In one embodiment of the utility model, the wall thickness of the connecting column is 3mm-4mm.

The wall thickness of the connecting column is limited to 3mm-4mm, so that the connecting column has good structural strength, the connecting column is connected with the connecting piece more stably, the connecting column can be kept in a smaller diameter size range to meet the requirements of connecting the connecting piece with the connecting column in the through holes and fixing the end plate, the through holes of the end plate can be in a proper diameter size range during design and manufacture, the end plate has good structural strength at the through hole fixing part, and the end plate and the box body can play a good role in inhibiting expansion of a battery cell after being fixed.

In one embodiment of the utility model, the connecting post is in clearance fit with the perforation, and the clearance between the connecting post and the perforation is 1mm-2mm.

In this embodiment, establish spliced pole and perforation as clearance fit, can make the spliced pole stretch into in the perforation comparatively conveniently and be connected fixedly with the connecting piece, make the fixed comparatively convenient of end plate easy, clearance between spliced pole and the perforation is limited between 1mm-2mm, can make the spliced pole can have great diameter size under the condition of comparatively conveniently stretching into the perforation, thereby make the spliced pole can have higher structural strength, it is more firm to make the spliced pole be connected with the connecting piece, after end plate and box assembly, can make the end plate under battery cell inflation effect, end plate and spliced pole can have less relative displacement in the radial direction of spliced pole, thereby the end plate can cooperate with spliced pole and connecting piece better with the expansion of restraining battery cell, make the battery more stable in the operation.

In some embodiments of the utility model, the cross-sections of the perforations are equal throughout the first direction.

The embodiment sets up the perforated cross section to equal everywhere in first direction, and is comparatively convenient when making connecting piece and spliced pole and end plate assembly, and the perforation is comparatively convenient easy of processing on the end plate to can reduce the manufacturing cost of processing of end plate to a certain extent, promote the production efficiency of battery.

In some embodiments of the utility model, the perforation comprises a first hole section and a second hole section connected in a first direction, the first hole section being located on a side of the second hole section facing the connection post, the first hole section having a cross-sectional dimension that is larger than a cross-sectional dimension of the second hole section, the connection post fitting within the first hole section.

In this embodiment, the cross-sectional dimension of the first hole section and the second hole Duan Judi, which is a hole section, is greater than the cross-sectional dimension of the second hole section, so that the through holes can be better matched with the connection fixing of the connecting piece and the connecting column, and the whole structure of the end plate, the connecting piece and the connecting column is more compact, so that the end plate and the box body can be more stable and firm to a certain extent when being fixed.

In one embodiment of the utility model, a step surface is formed at the connection position of the first hole section and the second hole section, and a gap is formed between the end of the connecting column facing the second hole section and the step surface.

In this embodiment, be provided with the clearance between the one end of spliced pole orientation second hole section and the step face, can reduce the step greatly and stretch into the hindrance of first hole section to the spliced pole, make the spliced pole can stretch into in the first hole section completely to make the terminal plate can be stable well with the interior wall face butt in the holding chamber of box, make terminal plate and box fixed more reliable.

In one embodiment of the utility model, the gap between the one end of the connecting post and the step surface is 1mm-2mm.

According to the embodiment, the gap between one end of the connecting column and the step surface is limited to be 1-2 mm, the connecting column can well extend into the first hole section completely, the first hole section is matched with the connecting column in the first direction to be more compact, so that the end plate has higher structural strength to a certain extent, and the connecting column can be matched with the connecting piece to fix the end plate on the box body more stably.

The electricity consumption device according to the second aspect of the utility model comprises a battery according to the first aspect of the utility model.

According to the electric device disclosed by the utility model, the battery in the first aspect is arranged, the connecting column is arranged in the accommodating cavity of the box body, and the through holes for accommodating the connecting column are formed in the end plate, so that the end plate can form a complete plate surface without arranging the avoidance notch, the end plate can reliably protect the battery monomer when the battery module is assembled with the box body, the end plate can stably and reliably inhibit the expansion of the battery monomer, the possibility of collision damage and expansion deformation of the battery module is greatly reduced, the assembly of the battery module and the box body is more convenient and smooth, and the operation of the battery module is more stable and better.

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

FIG. 1 is a schematic diagram of an electrical device according to an embodiment of the present utility model;

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

fig. 3 is a schematic view of a partial explosion of a battery according to an embodiment of the present utility model;

fig. 4 is a schematic view of a main casing and a battery module according to an embodiment of the present utility model;

fig. 5 is a schematic view of a partial cross section of a case and a battery module at a connection member according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a partial enlargement at A shown in FIG. 5;

FIG. 7 is a schematic view of an end plate according to an embodiment of the utility model;

fig. 8 is a schematic view of another angle of an end plate according to an embodiment of the utility model.

Reference numerals:

10. a case; 101. a receiving chamber; 11. a main case; 111. a connecting column; 1111. a connection hole; 12. a cover plate;

20. a battery module; 21. a battery cell;

22. an end plate; 221. a plate main body; 222. a fixing part; 223. perforating; 224. a lightening hole;

30. a connecting piece;

100. A battery; 200. a controller; 300. a motor;

1000. and (5) an electric device.

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 "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 describing embodiments of the present utility model, the term "plurality" refers to more than two (including two).

In the description of the embodiments of the present utility model, the azimuth or positional relationship indicated by the technical terms "length", "thickness", "upper", "lower", "front", "rear", "left", "right", "bottom", "inside", "outside", etc. are based on the azimuth or positional relationship shown in the drawings, merely for convenience of describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus 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.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery 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, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

The battery is in the assembly process link, need assemble battery module into the box of battery, the battery module is equipped with the end plate in order to play the effect such as clamp fastening and expansion inhibition to a plurality of battery monomers in the battery module, the in-process of battery module loading into the box, owing to be equipped with in the box be used for with the fixed boss structure of end plate, form the breach of dodging that corresponds with boss structure on the end plate, boss structure cooperation and dodging the breach position, so that end plate and box fixed assembly, this makes the battery monomer in the battery module expose in the breach position of dodging of end plate, when the battery module loads into the box, dodging the battery monomer that the breach position exposes and bump with the boss easily, thereby lead to battery module damage, and the battery monomer lacks the structure that inhibits the inflation in the breach department of dodging of end plate, the problem that the inflation fracture appears easily in the region that makes battery monomer and dodging the breach position correspond.

Based on the above consideration, in order to reduce the possibility of collision damage when the battery module is assembled into the box and effectively inhibit the expansion of the battery cells in the battery module, the utility model designs a battery, wherein the end plate of the battery module in the battery is provided with a through hole, the battery box body is provided with a connecting column, the connecting column stretches into the through hole, and the fastening piece stretches into the through hole to be matched with the connecting column to fix the end plate, so that the end plate can fully cover the end face of the battery cells in the battery module when the battery module is assembled into the box body, thereby effectively inhibiting the expansion cracking of the battery cells and reducing the possibility of collision damage of the battery cells in the battery module.

The battery disclosed by the embodiment of the utility model can be used as an electric device of a power supply or various energy storage systems using the battery as an energy storage element, and the electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft 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.

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

Referring to fig. 1, fig. 1 is a schematic diagram of an electric device 1000 according to an embodiment of the utility model. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like. The battery 100 is provided in the interior of the vehicle, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle. The battery 100 may be used for power supply of a vehicle, for example, the battery 100 may be used as an operating power source of the vehicle. The vehicle may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle.

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

A battery according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 2 to 8. Fig. 2 is a schematic view of a battery 100 according to an embodiment of the present utility model; fig. 3 is a schematic view of a partial explosion of battery 100 according to an embodiment of the present utility model; fig. 4 is a schematic view of the main casing 11 and the battery module 20 according to an embodiment of the present utility model; fig. 5 is a schematic view of a partial cross-section of the case 10 and the battery module 20 at the connection member 30 according to an embodiment of the present utility model; FIG. 6 is a schematic view of a partial enlargement at A shown in FIG. 5; fig. 7 is a schematic view of an end plate 22 according to an embodiment of the utility model; fig. 8 is a schematic view of another angle of the end plate 22 according to an embodiment of the present utility model.

As shown in fig. 2 to 6, a battery 100 according to an embodiment of the first aspect of the present utility model includes: a case 10 and a battery module 20. The box body 10 is provided with a containing cavity 101, and the inner wall of the containing cavity 101 is provided with a connecting column 111; the battery module 20 is disposed in the accommodating chamber 101, the battery module 20 has an end plate 22, a through hole 223 penetrating the end plate 22 along a first direction (up-down direction as shown in fig. 5) is formed in the end plate 22, the connection post 111 is fitted in the through hole 223, and the battery module 20 is fixedly connected with the connection post 111 by extending the connection member 30 into the through hole 223 to be fixed to the case 10.

The case 10 is used for accommodating the battery module 20, the electrical connector 30, the electrical components and the like of the battery 100, and provides a good installation space and operation environment for the battery module 20, the electrical connector 30, the electrical components and the like, and the case 10 can be manufactured by adopting extruded aluminum profiles, die cast aluminum, composite materials, steel materials and the like, so that a good protection and fixing effect is provided for the battery module 20 and the like accommodated in the case 10. The shape of the case 10 may be reasonably set according to the design requirement of the battery 100, for example, the case 10 may be rectangular, prismatic, cylindrical, etc., the case 10 may be manufactured by means of sectional material split welding or integral molding, etc., and the case 10 may be in a structure in which a main case having an opening is matched with a cover plate, so that the battery module 20, etc. is assembled into the receiving chamber 101.

The battery module 20 may be formed by combining an end plate 22 and a plurality of battery cells 21, the battery cells 21 being the smallest units constituting the battery 100, the shape of the battery cells 21 may be square or circular, and the plurality of battery cells 21 may be stacked and arranged with the end plate 22 and other functional parts such as electrical connectors, insulating sheets, etc. to constitute the battery module 20. The battery module 20 may have one or more. The end plate 22 can be flat plate, the end plate 22 is arranged at two ends of the arrangement direction of the battery cells 21 in the battery module 20, the end plate 22 is adhered and fixed with the insulating sheets outside the battery cells 21 in the battery module 20 through double-sided adhesive tape to form a complete battery module 20, the end plate 22 can be matched with the side plates in the battery module 20 to clamp and fix a plurality of battery cells 21, the end plate 22 can be manufactured by adopting the same material as the box 10, and the end plate 22 can be integrally formed through die casting and the like.

In this embodiment, the connecting post 111 is disposed on the inner wall of the accommodating cavity 101, the connecting post 111 may be integrally formed with the box body 10 or welded with the box body 10 to form an integral body, the cross section of the connecting post 111 may be rectangular, circular, oval or the like, the connecting post 111 may be an equal-diameter post or a variable-diameter post, the connecting post 111 may be made of the same material as the box body 10, the height of the connecting post 111 may be reasonably set according to assembly requirements, the number of the connecting posts 111 may be plural, and the arrangement positions and arrangement manners of the connecting posts 111 on the inner wall of the accommodating cavity 101 may be flexibly set according to the assembly requirements of the battery module 20 and the box body 10.

The connecting member 30 that is cooperatively fixed with the connecting post 111 in this embodiment may be a fastener such as a screw or a bolt, the connecting member 30 and the connecting post 111 may be fastened by a threaded connection, and when the end plate 22 is fastened with the case 10, the connecting member 30 extends into the through hole 223 to be connected with the connecting post 111, so that the end plate 22 is clamped and fixed in the first direction by cooperating with the bottom wall of the receiving chamber 101, and the battery module 20 is further fastened in the case 10.

The size and shape of the perforations 223 formed in the end plate 22 may match the size and shape of the cross section of the connection post 111, and the number of perforations 223 and the locations of the perforations 223 formed in the end plate 22 may match the locations of the connection post 111.

In the present embodiment, referring to fig. 5 to 7, when the battery module 20 is assembled into the receiving chamber 101 of the case 10, the through holes 223 of the end plate 22 are engaged with the connection posts 111, and the connection posts 111 gradually extend into the through holes 223 from one end of the through holes 223, so that the end plate 22 is engaged with and fixed to the connection posts 111, and the battery module 20 is stably fixed in the receiving chamber 101.

After the end plate 22 of the battery module 20 is assembled and fixed with the connecting column 111, the connecting column 111 can fully extend into the through hole 223 of the end plate 22, and at the position of the through hole 223 matched with the connecting column 111, the end plate 22 can be abutted against the inner wall of the accommodating cavity 101 after being assembled, so that the end plate 22 can form a complete plate surface in the first direction when the end plate 22 is processed and manufactured, the end plate 22 can fully cover the surface of the battery cell 21 in the extending range of the first direction, and the end plate 22 can reliably separate the battery cell 21 from the connecting column 111 in the process of assembling the battery module 20 into the accommodating cavity 101 of the box body 10, thereby well reducing the collision damage condition of the battery cell 21 and the connecting column 111, and ensuring that the battery module 20 and the box body 10 are assembled more conveniently and smoothly.

The end plate 22 forms a complete plate surface in the first direction, after the battery module 20 is assembled and fixed with the box 10, the end plate 22 can be matched with the connecting column 111 in the extending range of the first direction to reliably inhibit the expansion of the battery cell 21, so that the possibility of the expansion deformation and even cracking of the battery cell 21 is reduced, and the battery module 20 can operate more stably and well.

According to the battery 100 of the embodiment of the utility model, the connecting column 111 is arranged in the accommodating cavity 101 of the case 10, and the through holes 223 for accommodating the connecting column 111 are formed in the end plate 22, so that no avoiding notch is required to be formed in the end plate 22, the surface of one side of the end plate 22 facing the battery cell 21 can form a complete plate surface, the end plate 22 can reliably protect the battery cell 21 when the battery module 20 is assembled with the case 10, the end plate 22 can stably and reliably inhibit the expansion of the battery cell 21, the possibility of collision damage and expansion deformation of the battery module 20 is greatly reduced, the assembly of the battery module 20 and the case 10 is more convenient and smooth, and the operation of the battery module 20 is more stable and good.

In some embodiments of the present utility model, as shown in fig. 2 and 3, the case 10 may include: the main box 11 and the apron 12, one side of main box 11 is open, and apron 12 lid is established in the open side of main box 11 and cooperates with main box 11 and forms accommodation chamber 101.

When the battery 100 is assembled, the cover plate 12 and the main case 11 are in a separated state, the battery module 20 is loaded into the accommodating chamber 101 from the open side of the main case 11 and is positioned and fixed with the connecting column 111 by the end plate 22, and the end plate 22 and the main case 11 are fastened and fixed with the connecting column 111 by the connecting member 30.

In this embodiment, the case 10 includes the main case 11 and the cover plate 12, so that the battery module 20 and the case 10 can be assembled conveniently, and the battery 100 can be assembled conveniently.

In some embodiments of the present utility model, as shown in fig. 5 to 8, the end plate 22 may include a fixing portion 222, the fixing portion 222 extending in a first direction, a penetration hole 223 formed at the fixing portion 222 and penetrating the fixing portion 222 in the first direction, and the fixing portion 222 extending toward an end of one end of the connection post 111 to an end surface of the battery cell 21 of the battery module 20 in the first direction.

The through hole 223 penetrates through the fixing portion 222 along the first direction, when the end plate 22 and the connecting column 111 are assembled, the connecting column 111 can extend into the through hole 223 from one end of the end plate 22, and the length of the connecting column 111 can be reasonably set according to assembly requirements. The fixing portion 222 extends toward the end of one end of the connection post 111 to the end face of the battery cell 21 of the battery module 20, that is, the fixing portion 222 of the end plate 22 for cooperation with the connection post 111 may cover the end face of the battery cell 21 in the first direction, and after the end face of the battery cell 21 abuts on the bottom wall of the accommodating chamber 101, the end of the fixing portion 222 may also abut on the bottom wall of the accommodating chamber 101.

In this embodiment, the fixing portion 222 extends to the end face of the battery cell 21 toward the end of one end of the connecting post 111, so that the fixing portion 222 of the end plate 22 can always protect the battery cell 21 within the extending range of the end plate 22 along the first direction, the fixing portion 222 can reliably separate the connecting post 111 from the battery cell 21, so that the situation that the battery cell 21 is knocked and damaged during assembly is greatly reduced, and after the fixing portion 222 is assembled and fixed with the connecting post 111, the fixing portion 222 can better inhibit the expansion of the battery cell 21, so that the battery module 20 operates more stably and well.

In one embodiment of the present utility model, as shown in fig. 5 to 8, the end plate 22 may further include a plate main body 221, and the fixing portion 222 is coupled to at least one side of the plate main body 221 in a second direction (a left-right direction as shown in fig. 8) perpendicular to the first direction, wherein an end of the fixing portion 222 facing the connection post 111 is flush with an end of the plate main body 221 facing the connection post 111 in the first direction.

The fixing portion 222 is connected to at least one side of the plate body 221 in the second direction, that is, the fixing portion 222 may be formed at one side of the plate body 221 in the second direction, or the plate body 221 may be formed with the fixing portion 222 at both sides of the second direction. The end of the fixing portion 222 facing the connection post 111 is flush with the end of the plate main body 221 facing the connection post 111, that is, the end surface of the end plate 22 facing the connection post 111 in the first direction forms a continuous plane, and after the end plate 22 is assembled and fixed with the case 10, the end surface of the end plate 22 facing the connection post 111 can always abut against the inner wall of the accommodating chamber 101 in the extension range of the end plate 22 in the second direction.

In this embodiment, the end plate 22 is disposed on the plate main body 221 and the fixing portion 222 to cover a side surface of the battery cell 21 in the stacking direction (the front-rear direction as shown in fig. 3), so as to protect the battery cell 21 in the extension range of the second direction and the first direction, so that the end plate 22 can well protect the battery cell 21, and the structure is simple and the assembly is convenient.

In some examples of the present utility model, as shown in fig. 7 and 8, the plate body 221 may be formed with weight-reducing holes 224, the weight-reducing holes 224 extending in a first direction, one or more weight-reducing holes 224, and a plurality of weight-reducing holes 224 arranged at intervals in a second direction.

The lightening holes 224 may be formed in a blind hole or a hollow structure through the plate body 221 in the first direction, the lightening holes 224 may be formed in a triangular, rectangular, diamond-shaped, irregular-shaped, etc. when the lightening holes 224 are provided in plurality, for example, the lightening holes 224 are provided with two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, etc. holes, the lightening holes 224 may be formed in the same or different cross-sectional shapes, the lightening holes 224 may be formed in the same or different cross-sectional sizes, and the lightening holes 224 may be uniformly or unevenly arranged in the plate body 221.

The weight-reducing holes 224 are formed in the plate main body 221, so that the weight of the plate main body 221 can be reduced, and the weight of the end plate 22 is lighter, thereby facilitating the assembly of the end plate 22 in the battery module 20, being beneficial to improving the weight energy density of the battery 100 and meeting the light weight requirement of the battery 100.

In some embodiments of the present utility model, referring to fig. 6, a side surface of the end plate 22 facing the battery cells 21 of the battery module 20 is a first surface, and a minimum distance between the inner wall of the penetration hole 223 and the first surface in the thickness direction of the end plate 22 (front-rear direction as shown in fig. 6) may be 2.5mm-3mm.

As shown in fig. 6, a1 is shown as a minimum distance between the inner wall of the through hole 223 and the first surface, and a minimum distance a1 between the inner wall of the through hole 223 and the first surface is 2.5mm to 3mm, for example, the minimum distance a1 may be 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, or the like.

In this embodiment, the minimum distance between the inner wall of the through hole 223 and the first surface is defined between 2.5mm and 3mm, so that the side of the end plate 22, which faces the battery cell 21, at the position of the through hole 223 has sufficient structural strength to bear the pressure on the end plate 22 when the battery cell 21 expands, the fixing portion 222 of the end plate 22 can stably and reliably inhibit the expansion of the battery cell 21, and the end plate 22 and the case 10 can maintain a stable and good structural state after being assembled, so that the battery 100 is more stable during use.

In some embodiments of the present utility model, referring to fig. 5 to 8, the end plate 22 may be provided with a plurality of through holes 223 arranged at intervals, the number of the connection posts 111 is plural, and the plurality of connection posts 111 are in one-to-one correspondence with the plurality of through holes 223.

For example, the perforations 223 may be provided in two, three, four, five, six, etc., and the plurality of perforations 223 may be spaced apart on the end plate 22, and specifically, the fixing portion 222 may be provided in plurality, and one or more perforations 223 may be provided on the plurality of fixing portions 222. The number of the connection posts 111 is provided in plurality, for example, the connection posts 111 may be provided with two, three, four, five, six, etc., and the number of the connection posts 111 and the arrangement in the accommodation chamber 101 may be matched with the number and arrangement of the perforations 223.

In this embodiment, the plurality of perforations 223 arranged at intervals are arranged on the end plate 22 in a one-to-one correspondence with the plurality of connecting columns 111, so that the end plate 22 and the box 10 can be fixed and positioned more conveniently, and the fixation is more firm and reliable.

In some embodiments of the present utility model, as shown in fig. 5, the connection column 111 may be formed with a connection hole 1111, the connection member 30 may be a bolt, and one end of the connection member 30 may extend into the connection hole 1111 to be fixedly connected with the connection column 111.

The bolts may be hexagonal bolts, flange bolts, carriage bolts, etc., the inner circumferential wall of the coupling hole 1111 is formed with threads engaged with the bolts, and when the battery module 20 is fastened after being assembled with the case 10, the screws of the bolts extend into the through holes 223 to be engaged with the coupling holes 1111 of the coupling post 111 positioned in the through holes 223, and as the bolts are tightened with the coupling holes 1111, the heads of the bolts clamp the end plate 22 downward, so that the end plate 22 is clamped and fastened in the receiving chamber 101 of the case 10.

In this embodiment, the connecting column 111 is formed with a connecting hole 1111 for engaging with a bolt, and the end plate 22 is fixed in the case 10 by the bolt, so that the structure is simple, the fixation is firm, and the disassembly is convenient.

In one embodiment of the present utility model, as shown with reference to fig. 5 and 6, the ratio of the length of the connection post 111 protruding into the penetration 223 to the diameter of the connection member 30 may be 2 or more.

As shown in fig. 6, L1 is shown as a length of the connection post 111 protruding into the through hole 223, D1 is shown as a diameter of the connection member 30, and a ratio of the length L1 of the connection post 111 protruding into the through hole 223 to the diameter D1 of the connection member 30 may be 2, 2.1, 2.2, 2.3, 2.4, or the like.

In this embodiment, the ratio of the length of the connecting post 111 extending into the through hole 223 to the diameter of the connecting member 30 is defined to be greater than or equal to 2, so that the connecting post 111 and the connecting member 30 have a sufficient mating connection length when being mated and connected in the through hole 223, so that the connecting post 111 and the connecting member 30 can be more reliably connected and fixed in the through hole 223, and the end plate 22 can be more reliably fixed between the connecting post 111 and the connecting member 30. The structural strength of the matched connecting section of the connecting column 111 and the connecting piece 30 is high, the ratio of the length of the connecting column 111 extending into the through hole 223 to the diameter of the connecting piece 30 is set to be more than or equal to 2, and the connecting column 111 and the connecting piece 30 can have longer connecting section length in the through hole 223, so that the connecting piece 30 is matched and connected with the connecting column 111 to play a certain structural reinforcing role on the end plate 22, and the end plate 22 can better restrain deformation expansion of the battery cell 21.

In one embodiment of the present utility model, referring to fig. 5 and 6, the ratio of the length of the connection member 30 protruding into the connection hole 1111 to the diameter of the connection member 30 is 1.5 or more.

As shown in fig. 6, L2 is represented as a length of the connection member 30 protruding into the connection hole 1111, and a ratio of the length L2 of the connection member 30 protruding into the connection hole 1111 to the diameter D1 of the connection member 30 may be 1.5, 1.6, 1.7, 1.8, 1.9, 2, etc.

In this embodiment, the ratio of the length of the connecting member 30 extending into the connecting hole 1111 to the diameter of the connecting member 30 is set to be 1.5 or more, so that the connecting member 30 and the connecting post 111 have a sufficient connection matching length, so that the connecting member 30 and the connecting post 111 are connected and fixed more stably and firmly, and the end plate 22 is fixed more stably and reliably in the box 10.

In one embodiment of the present utility model, referring to fig. 5 and 6, the ratio of the length of the connection post 111 protruding into the penetration hole 223 to the diameter of the connection member 30 may be equal to or greater than 2, and the ratio of the length of the connection member 30 protruding into the connection hole 1111 to the diameter of the connection member 30 may be equal to or greater than 1.5.

For example, the ratio of the length L1 of the connection post 111 protruding into the through hole 223 to the diameter D1 of the connection member 30 may be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, etc., and the ratio of the length L2 of the connection member 30 protruding into the connection hole 1111 to the diameter D1 of the connection member 30 may be 1.5, 1.6, 1.7, 1.8, 1.9, 2, etc.

In this embodiment, the ratio of the length of the connecting post 111 extending into the through hole 223 to the diameter of the connecting member 30 is defined to be equal to or greater than 2, and the ratio of the length of the connecting member 30 extending into the connecting hole 1111 to the diameter of the connecting member 30 is defined to be equal to or greater than 1.5, so that the connecting member 30 and the connecting post 111 can be reliably and stably connected in the through hole 223, thereby enabling the end plate 22 to be stably and firmly assembled and fixed with the case 10, enabling the end plate 22 to better inhibit the expansion of the battery cell 21, and enabling the battery 100 to operate more stably.

In one embodiment of the present utility model, as shown with reference to fig. 5 and 6, the ratio of the length of the connection post 111 protruding into the penetration 223 to the diameter of the connection member 30 may be 3 or more.

For example, the ratio of the length L1 of the connecting post 111 extending into the aperture 223 to the diameter D1 of the connector 30 may be 3, 3.1, 3.2, 3.3, 3.4, 3.5, etc.

The ratio of the length of the connecting post 111 extending into the through hole 223 to the diameter of the connecting piece 30 is further limited to 3 or more, so that the connecting post 111 has a better connection matching length when being connected with the connecting piece 30 in the through hole 223, the connecting post 111 and the connecting piece 30 are connected in the connecting hole 1111 more stably and firmly, the end plate 22 can be better supported and fixed and structurally reinforced, the end plate 22 is more stably fixed in the box 10, and the end plate 22 can better inhibit the expansion of the battery cells 21, so that the battery 100 can be more stably operated.

In one embodiment of the present utility model, as shown with reference to fig. 5 and 6, the ratio of the length of the connection member 30 protruding into the connection hole 1111 to the diameter of the connection member 30 is 2 or more.

For example, the ratio of the length L2 of the connection post 111 protruding into the connection hole 1111 to the diameter D1 of the connection member 30 may be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, etc.

In this embodiment, the ratio of the length of the connecting post 111 extending into the connecting hole 1111 to the diameter of the connecting member 30 is further defined to be greater than or equal to 2, so that the connecting post 111 and the connecting member 30 have a better connection matching length, thereby ensuring that the connecting post 111 and the connecting member 30 are connected and fixed more reliably, and ensuring that the end plate 22 and the box 10 are fixed more firmly.

In one embodiment of the present utility model, referring to fig. 5 and 6, the ratio of the length of the connection post 111 protruding into the penetration hole 223 to the diameter of the connection member 30 may be 3 or more, and the ratio of the length of the connection member 30 protruding into the connection hole 1111 to the diameter of the connection member 30 may be 2 or more.

For example, the ratio of the length L1 of the connecting post 111 extending into the through hole 223 to the diameter D1 of the connecting member 30 in this embodiment may be 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, etc., and the ratio of the length L2 of the connecting post 111 extending into the connecting hole 1111 to the diameter D1 of the connecting member 30 may be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, etc.

In this embodiment, the ratio of the length of the connecting post 111 extending into the through hole 223 to the diameter of the connecting member 30 is further defined to be 3 or more, and the ratio of the length of the connecting post 111 extending into the connecting hole 1111 to the diameter of the connecting member 30 is further defined to be 2 or more, so that when the end plate 22 is assembled and fixed with the case 10, the connecting member 30 is more firmly connected with the connecting post 111, the overall structural strength of the connecting member 30 and the connecting post 111 after being connected and fixed is higher, thereby fixing the end plate 22 and the case 10 more stably and firmly, and the fixing portion 222 of the end plate 22 can better inhibit the deformation and expansion of the battery cell 21 under the effect of the structural reinforcement of the connecting member 30 and the connecting post 111, thereby making the battery 100 more stable during operation.

In one embodiment of the present utility model, as shown with reference to fig. 5 and 6, the wall thickness of the connection post 111 may be 3mm-4mm.

As shown in fig. 6, a2 is represented as the wall thickness of the connection post 111, and the wall thickness a2 of the connection post 111 may be 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, or the like.

In this embodiment, the wall thickness of the connecting post 111 is limited to 3mm-4mm, so that the connecting post 111 has good structural strength, the connecting post 111 and the connecting piece 30 are connected more stably, the connecting post 111 can be kept within a smaller diameter size range to meet the requirement that the connecting piece 30 and the connecting post 111 are connected in the through hole 223 and fix the end plate 22, the through hole 223 of the end plate 22 can be within a proper diameter size range during design and manufacture, so that the fixing portion 222 of the end plate 22 with the through hole 223 has good structural strength, and the end plate 22 and the box 10 can play a good role in inhibiting the expansion of the battery cell 21 after being fixed.

In one embodiment of the present utility model, referring to fig. 5 and 6, the connection post 111 and the penetration hole 223 may be clearance-fitted, and the clearance between the connection post 111 and the penetration hole 223 is 1mm-2mm.

As shown in fig. 6, a3 is shown as a gap between the connection post 111 and the through hole 223, and a gap a3 between the connection post 111 and the through hole 223 is 1mm-2mm, for example, the gap a3 between the connection post 111 and the through hole 223 may be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, or the like.

In this embodiment, the connecting post 111 and the through hole 223 are set to be in clearance fit, so that the connecting post 111 can conveniently extend into the through hole 223 to be connected and fixed with the connecting piece 30, so that the fixing of the end plate 22 is convenient and easy, the clearance between the connecting post 111 and the through hole 223 is limited to be 1mm-2mm, the connecting post 111 can have larger diameter under the condition that the connecting post 111 conveniently extends into the through hole 223, so that the connecting post 111 can have higher structural strength, the connecting post 111 can be connected with the connecting piece 30 more firmly, after the end plate 22 and the box 10 are assembled, the end plate 22 can have smaller relative displacement between the end plate 22 and the connecting post 111 in the radial direction of the connecting post 111 under the expansion effect of the battery cell 21, so that the end plate 22 can be better matched with the connecting post 111 and the connecting piece 30 to inhibit the expansion of the battery cell 21, and the battery 100 can be more stable in the operation process.

In some embodiments of the utility model, as shown in fig. 5, the cross-section of the perforations 223 may be equal everywhere in the first direction.

The cross section of the through holes 223 is equal everywhere, that is, the through holes 223 are straight holes and the walls of the holes are formed as continuous surfaces in the first direction, and the connection posts 111 and the connection members 30 are respectively connected by extending into the through holes 223 from both ends of the through holes 223 in the first direction when the end plate 22 is fixed to the case 10.

In this embodiment, the cross sections of the through holes 223 are equal in the first direction, so that the assembly of the connecting piece 30, the connecting post 111 and the end plate 22 is convenient, and the processing of the through holes 223 on the end plate 22 is convenient and easy, thereby reducing the processing and manufacturing cost of the end plate 22 to a certain extent and improving the production efficiency of the battery 100.

In some embodiments of the present utility model, referring to fig. 5 and 6, the perforation 223 may include a first hole section and a second hole section connected in a first direction, the first hole section being located at a side of the second hole section facing the connection post 111, the first hole section having a larger cross-sectional dimension than the second hole section, the connection post 111 being fitted into the first hole section.

When the end plate 22 is assembled and fixed with the box body 10, the connecting column 111 extends into the first hole section, the connecting piece 30 extends into the first hole section from the second hole section to be connected with the connecting column 111 in a matching way, wherein one part of the connecting piece 30 is positioned in the first hole section and the connecting hole 1111 of the connecting column 111, and the other part of the connecting piece 30 is positioned in the first hole section.

It will be appreciated that, since the connecting member 30 is engaged with the connecting hole 1111 of the connecting post 111, the diameter of the connecting member 30 is smaller than the outer diameter of the connecting post 111, and the cross-sectional dimension of the first hole section and the second hole Duan Judi is larger than that of the second hole section in this embodiment, the first hole section is better engaged with the outer diameter of the connecting post 111, and the second hole section is better engaged with the diameter of the connecting member 30, so that the gap between the connecting member 30 and the hole 223 in the second hole section is smaller, and the gap between the connecting post 111 and the hole 223 in the first hole section is smaller, so that the structural strength of the end plate 22 at the hole 223 is higher.

In this embodiment, the cross-sectional dimension of the hole section of the first hole section and the second hole Duan Judi is larger than that of the second hole section, so that the through hole 223 can be better matched with the connection and fixation of the connecting piece 30 and the connecting column 111, and the overall structure of the end plate 22, the connecting piece 30 and the connecting column 111 is more compact, so that the end plate 22 and the box 10 can be more stable and firm to a certain extent.

In one embodiment of the present utility model, referring to fig. 5 and 6, a connection position of the first hole section and the second hole section may be formed with a stepped surface, and an end of the connection post 111 facing the second hole section has a gap with the stepped surface.

When the end plate 22 is fixed with the box body 10, the connecting column 111 on the box body 10 extends into the first hole section from one end of the first hole section, which is far away from the step surface, and the connecting piece 30 extends into the second hole section from one end of the second hole section, which is far away from the step surface, and extends out of the step surface from the other end of the second hole section to be connected and fixed with the connecting column 111.

In this embodiment, a gap is provided between one end of the connecting post 111 facing the second hole section and the step surface, which can greatly reduce the obstruction of the step surface to the connecting post 111 extending into the first hole section, so that the connecting post 111 can extend into the first hole section completely, and thus the end plate 22 can be stably and well abutted against the inner wall surface of the accommodating cavity 101 of the box body 10, and the end plate 22 and the box body 10 are fixed more reliably.

In one embodiment of the present utility model, referring to fig. 5 and 6, the gap between one end of the connection post 111 and the step surface may be 1mm-2mm.

In this embodiment, the gap between one end of the connecting post 111 and the step surface is set to 1mm-2mm, and for example, the gap may be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, or the like.

In this embodiment, the gap between one end of the connecting post 111 and the step surface is limited to 1mm to 2mm, so that the connecting post 111 can be better fully inserted into the first hole section, and the first hole section is more compact in cooperation with the connecting post 111 in the first direction, so that the end plate 22 can have higher structural strength to a certain extent, and the connecting post 111 can be more stably fixed on the box body 10 in cooperation with the connecting piece 30.

An electrical device 1000 according to an embodiment of the second aspect of the present utility model is described below with reference to fig. 1 to 8.

As shown in fig. 1 to 8, an electric device 1000 according to an embodiment of the present utility model includes a battery 100 according to an embodiment of the first aspect of the present utility model.

Other constructions and operations of the battery 100 according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein.

According to the electricity utilization device 1000 of the embodiment of the present utility model, by arranging the battery 100 of the first embodiment, the battery 100 is provided with the connecting column 111 in the accommodating cavity 101 of the case 10, and the end plate 22 is provided with the through hole 223 for accommodating the connecting column 111, so that no avoidance gap is required to be arranged on the end plate 22, the surface of one side of the end plate 22 facing the battery cell 21 can form a complete plate surface, thereby the end plate 22 can reliably protect the battery cell 21 when the battery module 20 is assembled with the case 10, the end plate 22 can stably and reliably inhibit the expansion of the battery cell 21, thereby greatly reducing the possibility of collision damage and expansion deformation of the battery module 20, ensuring that the assembly of the battery module 20 and the case 10 is more convenient and smooth, and the operation of the battery module 20 is more stable and better.

A battery 100 according to an embodiment of the present utility model will be described below with reference to fig. 2 to 8.

In a first embodiment of the present utility model,

as shown in fig. 2 to 8, the battery 100 includes a case 10, a battery module 20, and a connector 30, the case 10 includes a main case 11 and a cover 12, the main case 11 and the cover 12 cooperate to define a receiving chamber 101, the receiving chamber 101 has a connection post 111 integrally formed at a bottom wall of the main case 11 in a first direction, the connection post 111 is provided with a connection hole 1111, and the connection hole 1111 is a threaded hole. The battery modules 20 are provided with eight, the eight battery modules 20 are equally divided into two rows, each row of battery modules 20 is arranged side by side in the second direction, the battery modules 20 include a plurality of battery cells 21 and end plates 22, the end plates 22 are provided with two and are arranged at both ends of the battery modules 20, and the end plates 22 extend in the second direction. The connecting member 30 is a bolt, and the case 10 and the end plate 22 are made of aluminum.

The end plate 22 includes a plate main body 221 and a fixing portion 222, the fixing portion 222 is provided with two and is located at both ends of the plate main body 221 in the second direction, eleven weight-reducing holes 224 extending in the first direction are provided on the plate main body 221, and the fixing portion 222 is provided with a through hole 223 extending in the first direction, and the through hole 223 is a cylindrical hole.

When the end plate 22 is fixed to the case 10, the through hole 223 is engaged with the connection post 111, the connection post 111 is inserted into the through hole 223, one end of the end plate 22 facing the connection post 111 in the first direction is abutted against the inner wall of the accommodating chamber 101 of the case 10, and the bolt is inserted into the through hole 223 from the other end of the through hole 223 and is screwed into the screw hole of the connection post 111, so that the bolt is engaged with the connection post 111 to fasten the end plate 22 to the case 10.

In this embodiment, by setting the battery 100 according to the above first aspect of the embodiment, the connecting column 111 is disposed in the accommodating cavity 101 of the case 10 in the battery 100, and the through hole 223 for accommodating the connecting column 111 is formed in the end plate 22, so that the end plate 22 does not need to be provided with a recess for avoiding, so that a complete plate surface can be formed on a side surface of the end plate 22 facing the battery unit 21, thereby the end plate 22 can reliably protect the battery unit 21 when the battery module 20 is assembled with the case 10, so that the end plate 22 can stably and reliably inhibit the expansion of the battery unit 21, thereby greatly reducing the possibility of collision damage and expansion deformation of the battery module 20, facilitating the assembly of the battery module 20 and the case 10, and ensuring that the battery module 20 operates more stably and well.

In a second embodiment of the present invention,

referring to fig. 5 to 8, the present embodiment is substantially the same as the first embodiment in that only the difference is that: the through holes 223 are formed into stepped holes, the through holes 223 comprise a first hole section and a second hole section, the diameter size of the first hole section is matched with the outer diameter size of the connecting column 111, the diameter size of the second hole section is matched with the diameter size of the connecting piece 30, so that the through holes 223 can be matched with the connecting piece 30 to be connected and fixed with the connecting column 111 better, the end plate 22 is compacter with the connecting piece 30 and the connecting column 111 after being assembled, and the end plate 22 is fixed stably and firmly.

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 (16)

1. A battery, comprising:

the box body (10), the box body (10) is provided with a containing cavity (101), and a connecting column (111) is arranged on the inner wall of the containing cavity (101);

the battery module (20), battery module (20) are located hold chamber (101), battery module (20) have end plate (22), be formed with on end plate (22) along first direction link up perforation (223) of end plate (22), spliced pole (111) cooperate in perforation (223), battery module (20) stretch into through connecting piece (30) perforation (223) with spliced pole (111) fixed connection, in order to be fixed in box (10).

2. The battery according to claim 1, wherein the end plate (22) includes a fixing portion (222), the fixing portion (222) extending in the first direction, the penetration hole (223) being formed in the fixing portion (222) and penetrating the fixing portion (222) in the first direction, the fixing portion (222) extending to an end face of the battery cell (21) of the battery module (20) toward an end of one end of the connection post (111) in the first direction.

3. The battery according to claim 2, wherein the end plate (22) further comprises a plate main body (221), the fixing portion (222) being connected to at least one side of the plate main body (221) in a second direction perpendicular to the first direction, wherein in the first direction, an end of the fixing portion (222) facing the connection post (111) is flush with an end of the plate main body (221) facing the connection post (111).

4. A battery according to claim 3, wherein the plate body (221) is formed with lightening holes (224), the lightening holes (224) extending in the first direction, the lightening holes (224) being one or more, and the lightening holes (224) being arranged at intervals in the second direction.

5. The battery according to claim 1, wherein a side surface of the end plate (22) facing the battery cells (21) of the battery module (20) is a first surface, and a minimum distance between an inner wall of the through hole (223) and the first surface in a thickness direction of the end plate (22) is 2.5mm to 3mm.

6. The battery according to claim 1, wherein a plurality of through holes (223) are formed in the end plate (22) at intervals, the number of the connecting posts (111) is plural, and the plurality of connecting posts (111) are in one-to-one correspondence with the plurality of through holes (223).

7. The battery according to claim 1, wherein the connecting column (111) is formed with a connecting hole (1111), the connecting member (30) is a bolt, and one end of the connecting member (30) extends into the connecting hole (1111) and is fixedly connected with the connecting column (111).

8. The battery according to claim 7, wherein a ratio of a length of the connecting post (111) protruding into the through hole (223) to a diameter of the connecting member (30) is 2 or more; and/or the number of the groups of groups,

the ratio of the length of the connecting piece (30) extending into the connecting hole (1111) to the diameter of the connecting piece (30) is greater than or equal to 1.5.

9. The battery according to claim 7, wherein a ratio of a length of the connecting post (111) protruding into the through hole (223) to a diameter of the connecting member (30) is 3 or more; and/or the number of the groups of groups,

the ratio of the length of the connecting piece (30) extending into the connecting hole (1111) to the diameter of the connecting piece (30) is greater than or equal to 2.

10. The battery according to claim 7, characterized in that the wall thickness of the connecting post (111) is 3-4 mm.

11. The battery according to claim 7, characterized in that the connection post (111) is in clearance fit with the perforation (223) and the clearance between the connection post (111) and the perforation (223) is 1mm-2mm.

12. The battery according to any one of claims 1-11, characterized in that the cross-sections of the perforations (223) are equal everywhere in the first direction.

13. The battery according to any one of claims 1-11, wherein the perforation (223) comprises a first hole section and a second hole section connected in a first direction, the first hole section being located on a side of the second hole section facing the connection post (111), the cross-sectional dimension of the first hole section being larger than the cross-sectional dimension of the second hole section, the connection post (111) fitting within the first hole section.

14. The battery according to claim 13, wherein a step surface is formed at a connection position of the first hole section and the second hole section, and a gap is provided between an end of the connection post (111) facing the second hole section and the step surface.

15. The battery according to claim 14, wherein a gap between the one end of the connecting post (111) and the step surface is 1mm-2mm.

16. An electrical device comprising a battery according to any one of claims 1-15.