CN217468628U - a battery device - Google Patents

Abstract

The utility model relates to the technical field of cylindrical batteries, and provides a battery device. The battery device includes a battery bracket, a cylindrical battery and a battery box, the battery bracket is provided with a battery accommodating cavity, and the battery accommodating cavity is used for accommodating the cylindrical battery. The battery box includes a fixing beam, the fixing beam has a bearing surface, the bearing surface is used to carry the battery bracket, and the battery accommodating cavity is at least partially facing the bearing surface. By setting the battery box to have a bearing surface, the bearing surface is the overlapping position between the battery bracket and the battery box. By arranging the battery accommodating cavity at least partially facing the bearing surface, the battery accommodating cavity is at least partially facing the overlapping position, that is, the projection of the part of the battery bracket provided with the accommodating groove on the bearing surface is at least the same as the bearing surface. Partial overlap means that the part of the battery bracket provided with the accommodating groove can expand outward and occupy the overlapping position, thereby improving the space utilization rate, so that more cylindrical batteries can be accommodated, so as to achieve the purpose of improving the energy density of the battery device.

Description

a battery device

technical field

The utility model relates to the technical field of cylindrical batteries, in particular to a battery device.

Background technique

In the related art, the battery bracket of the battery device does not fully utilize the space, and there is a situation in which the cylindrical battery is less accommodated and the space utilization rate is relatively low.

Utility model content

The utility model provides a battery device, which improves the space utilization rate.

According to one aspect of the present invention, a battery device is provided, comprising:

a battery bracket and a cylindrical battery, the battery bracket is provided with a battery accommodating cavity, and the battery accommodating cavity is used for accommodating the cylindrical battery;

A battery box, the battery box includes a fixing beam, the fixing beam has a bearing surface, the bearing surface is used for carrying the battery bracket, and the battery accommodating cavity is at least partially facing the bearing surface.

In the battery device provided by the embodiment of the present invention, a battery bracket is provided, and the battery bracket is used to carry the cylindrical battery, which plays a role of supporting the cylindrical battery, and ensures the bearing and stabilization effect of the cylindrical battery. By arranging a battery accommodating cavity on the battery bracket, the battery accommodating cavity provides a accommodating space for the cylindrical battery, and at the same time, it avoids the overturning of the cylindrical battery with a large size, and ensures the stability of the cylindrical battery. By setting the fixing beam of the battery box to have a bearing surface, the bearing surface plays the role of bearing the edge of the battery bracket, and the bearing surface is the overlapping position between the battery bracket and the battery box. If the battery bracket is provided with a battery accommodating cavity The part of the battery is completely staggered from the bearing surface, the overlapping position only realizes the overlapping between the battery box and the battery bracket, and the battery accommodating cavity also needs to avoid the overlapping position, so that the battery accommodating cavity can be set in the The location of the battery bay is relatively small, resulting in low space utilization. By setting the bearing surface to be configured to be able to carry at least the part of the battery bracket facing the battery accommodating cavity, so that at least part of the battery accommodating cavity faces the overlapping position, that is, the part of the battery bracket provided with the battery accommodating cavity is carrying The projection on the surface is at least partially overlapped with the bearing surface, which is equivalent to that the part of the battery bracket with the battery accommodating cavity can expand outward and occupy the overlapping position, which increases the position range where the battery accommodating cavity can be arranged on the battery bracket, and improves the performance of the battery bracket. Space utilization, so that more cylindrical batteries can be accommodated, so as to achieve the purpose of improving the energy density of the battery device.

Description of drawings

For a better understanding of the present disclosure, reference may be made to the embodiments shown in the following figures. Components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. Additionally, the relevant elements or components may be arranged differently as known in the art. Furthermore, in the drawings, the same reference numerals refer to the same or similar parts throughout the various figures. in:

FIG. 1 is a schematic structural diagram of a battery device with a battery box hidden according to the first exemplary embodiment;

FIG. 2 is a schematic diagram 1 of the cooperation between a fixing beam and a battery bracket in a battery device according to an exemplary embodiment;

FIG. 3 is a second schematic diagram showing the cooperation of a fixing beam and a battery bracket in a battery device according to an exemplary embodiment;

FIG. 4 is a schematic diagram showing the cooperation of a fixing beam and a battery bracket in a battery device according to two exemplary embodiments;

FIG. 5 is a schematic structural diagram of a battery box in a battery device according to an exemplary embodiment;

6 is a schematic structural diagram of a fixed beam in a battery device according to an exemplary embodiment;

FIG. 7 is a third schematic diagram showing the cooperation of a fixing beam and a battery bracket in a battery device according to an exemplary embodiment;

Fig. 8 is a schematic diagram 1 of the cooperation between a lifting lug assembly and an extension plate in a battery device according to an exemplary embodiment;

Fig. 9 is a second schematic diagram showing the cooperation between a lifting lug assembly and an extension plate in a battery device according to an exemplary embodiment.

The reference numerals are explained as follows:

1. Cylindrical battery; 2. Battery bracket; 3. Battery box; 4. Avoidance part; 5. Lifting ear assembly;

21, battery accommodating cavity; 22, groove; 23, extension plate; 231, through hole;

31, fixed beam; 311, protrusion; 3111, bearing surface; 312, connecting hole; 32, reinforcement; 33, base plate assembly; 34, frame.

Detailed ways

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that various modifications may be made to the example embodiments without departing from the scope of the present disclosure. modifications and changes.

In the description of the present disclosure, unless otherwise explicitly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be construed as indicating or implying relative importance; the term "plurality" is a means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the/said" or "an" object is also intended to mean one of the possible plurality of such objects.

Unless otherwise specified or stated, the terms "connected", "fixed", etc. should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection, or a signal connection. Connection; "connection" can be directly connected or indirectly connected through an intermediary. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

Further, in the description of the present disclosure, it should be understood that the directional terms "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are from the angles shown in the drawings. described, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being connected "on", "under", or "inside" or "outside" another element(s), it can not only be directly connected "On", "under" or "inside", "outside" another element(s), or indirectly connected "on", "under" or "outside" another element(s) through intervening elements inside and outside".

An embodiment of the present invention provides a battery device, please refer to FIG. 1 to FIG. 3 , the battery device includes a battery bracket 2 , a cylindrical battery 1 and a battery box 3 , and the battery bracket 2 is provided with a battery accommodating cavity 21 . , the battery accommodating cavity 21 is used for accommodating the cylindrical battery 1 . The battery box 3 includes a fixed beam 31 , the fixed beam 31 has a bearing surface 3111 , the bearing surface 3111 is used to carry the battery bracket 2 , and the battery accommodating cavity 21 at least partially faces the bearing surface 3111 , that is, along the height direction of the cylindrical battery 1 , the battery The projection of the accommodating cavity 21 on the bearing surface 3111 at least partially coincides with the bearing surface 3111 .

In the battery device provided in this embodiment, a battery bracket 2 is provided, and the battery bracket 2 is used to carry the cylindrical battery 1 to support the cylindrical battery 1 and ensure the bearing and stability of the cylindrical battery 1 . By arranging the battery accommodating cavity 21 on the battery bracket 2 , the battery accommodating cavity 21 provides a accommodating space for the cylindrical battery 1 , and at the same time, avoids the overturning of the cylindrical battery 1 with a large size, and ensures the stability of the cylindrical battery 1 . . By setting the fixing beam 31 of the battery box 3 to have a bearing surface 3111, the bearing surface 3111 plays the role of bearing the edge of the battery bracket 2, and the bearing surface 3111 is the overlapping position between the edge of the battery bracket 2 and the battery box 3, If the part of the battery holder 2 provided with the battery accommodating cavity 21 is completely staggered from the bearing surface 3111, the overlapping position only realizes the lap joint between the battery box 3 and the battery holder 2, and the battery accommodating cavity 21 also needs By avoiding the overlapping position, the position range where the battery accommodating cavity 21 can be arranged in the battery bracket 2 is relatively small, resulting in a relatively low space utilization rate. By arranging the battery accommodating cavity 21 at least partially facing the bearing surface 3111, the battery accommodating cavity 21 is at least partially facing the overlapping position, that is, the part of the battery bracket 2 where the battery accommodating cavity 21 is disposed on the bearing surface 3111 The projection and the bearing surface 3111 at least partially overlap, which is equivalent to that the part of the battery holder 2 with the battery accommodating cavity 21 can expand outward and occupy the overlapping position, which increases the position range of the battery accommodating cavity 21 that can be arranged in the battery holder 2 , to improve the space utilization rate, so that more cylindrical batteries 1 can be accommodated, so as to achieve the purpose of improving the energy density of the battery device.

It should be noted that the bearing surface 3111 carries the edge position of the battery bracket 2, not the large surface position of the battery bracket 2. That is, although the bearing surface 3111 is used to carry the battery bracket 2, it is not The bottom plate of the battery box 3 is realized.

Among them, the cylindrical battery 1 includes a cell and an electrolyte, and is the smallest unit capable of performing electrochemical reactions such as charge/discharge. The cell refers to a unit formed by winding a stacking part, and the stacking part includes a first electrode, a separator and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein, the polarities of the first electrode and the second electrode can be interchanged.

Specifically, the cell is a laminated cell, and the cell has a first pole piece that is stacked on each other, a second pole piece that is electrically opposite to the first pole piece, and is disposed between the first pole piece and the second pole piece The separator sheet is formed, so that multiple pairs of the first pole piece and the second pole piece are stacked to form a laminated cell.

Optionally, the cylindrical battery 1 can be a wound cylindrical battery, that is, a first pole piece, a second pole piece that is electrically opposite to the first pole piece, and a separator disposed between the first pole piece and the second pole piece. The sheet is wound to obtain a wound cell.

Specifically, the battery accommodating cavity 21 may be a through-hole structure provided on the battery bracket 2 . The size and shape of the through-hole structure are adapted to the size and shape of the cylindrical battery 1 , and the through-hole structure serves to fix the cylindrical battery. 1 can also discharge the heat generated by the cylindrical battery 1 while it is functioning; the battery accommodating cavity 21 can also be an accommodating groove on the battery bracket 2, and the size and shape of the accommodating groove are compatible with the size and shape of the cylindrical battery 1. The bottom of the accommodating groove has the effect of supporting the cylindrical battery 1, and the side wall of the accommodating groove has the effect of supporting the cylindrical battery 1, so as to avoid the risk of the cylindrical battery 1 falling. A discharge hole may be opened at the bottom of the accommodating groove, and the heat generated by the cylindrical battery 1 can be discharged by using the discharge hole, so as to achieve the effect of heat dissipation of the cylindrical battery 1 .

It can be understood that the battery bracket 2 is provided with an insulating portion, which acts as an isolation of the bus bar, avoids a short circuit between the bus bar and other conductive elements, and ensures the safety of the battery device.

Among them, the battery bracket 2 can be made of metal material, and the surface of the battery bracket 2 is coated with an insulating coating to form an insulating part, and the insulating coating acts to isolate the bus bar and other conductive elements to avoid short circuits situation, to ensure the safety of the battery device.

If the insulating coating on the battery holder 2 is easily scratched, the insulation will fail. Specifically, the battery holder 2 may be made of insulating resin materials, such as polycarbonate (PC), polyethylene terephthalate (PET), etc., or may be processed from other materials such as mica. Among them, mica has excellent high temperature insulation performance. When the thermal runaway of the cylindrical battery 1 occurs, the insulating plate made of mica can still maintain normal insulation performance, reducing the thermal runaway risk of the cylindrical battery 1 .

It should be noted that the shape of the battery bracket 2 is similar to a rectangular parallelepiped structure. The width direction of the battery bracket 2 is defined as the first direction, the length direction of the battery bracket 2 is the second direction, and the height direction of the battery bracket 2 is defined as The third direction is also the height direction of the cylindrical battery 1 . Wherein, the first direction, the second direction and the third direction are perpendicular to each other, and the first direction, the second direction and the third direction only represent spatial directions and have no substantial meaning.

In one embodiment, the number of battery accommodating cavities 21 is multiple, and the plurality of battery accommodating cavities 21 are arranged along the extending direction parallel to the fixing beam 31 .

The fixing beam 31 extends along the second direction, so that the plurality of battery accommodating cavities 21 are arranged along the second direction. With this arrangement, the fixing beam 31 is a connecting structure, and the fixing beam 31 can simultaneously perform the operation on the plurality of battery accommodating cavities 21 . bear.

In one embodiment, as shown in FIG. 1 to FIG. 3 , an escape portion 4 is provided between the battery box 3 and the side of the battery bracket 2 that are close to each other, the bearing surface 3111 is provided on the escape portion 4 , and the battery accommodating cavity 21 At least part of it is disposed directly opposite to the avoidance part 4 .

An avoidance portion 4 is provided between the battery box 3 and the battery bracket 2 on the side close to each other. The avoidance portion 4 realizes the avoidance between the battery box 3 and the battery bracket 2 and saves the space occupied when the two are in contact. Since the bearing surface 3111 is disposed on the avoidance portion 4 , the avoidance portion 4 plays a role of at least partially supporting the battery bracket 2 while effectively avoiding. By arranging the battery accommodating cavity 21 at least partially facing the avoidance part 4, that is, the battery accommodating cavity 21 is not completely dislocated from the avoidance part 4, so that the battery holder 2 is provided with a part of the battery accommodating cavity 21 occupied part and the avoidance part The space facing the part 4 does not cause waste of space and improves the space utilization rate.

In one embodiment, as shown in FIGS. 3-4 , a protrusion 311 is provided on the side of the fixing beam 31 of the battery box 3 close to the battery bracket 2 , and the battery accommodating cavity 21 of the battery bracket 2 corresponds to the protrusion 311 A groove 22 is provided, the protrusion 311 at least partially extends into the groove 22 to form at least a part of the avoidance portion 4, the battery accommodating cavity 21 is at least partially corresponding to the protrusion 311, and the top surface of the protrusion 311 is the bearing surface 3111; And/or, a protrusion 311 is provided on the side of the battery accommodating cavity 21 of the battery holder 2 close to the fixing beam 31, and the fixing beam 31 of the battery box 3 is provided with a groove 22 corresponding to the protrusion 311, and the protrusion 311 at least partially extends. into the groove 22 to form at least part of the avoidance part 4 , the battery accommodating cavity 21 is at least partially disposed on the protrusion 311 , and the bottom surface of the groove 22 is the bearing surface 3111 .

As shown in FIG. 3 , if the side of the fixing beam 31 of the battery box 3 close to the battery bracket 2 is provided with a protrusion 311 , the protrusion 311 plays a role in strengthening the structure of the battery box 3 , and the battery of the battery bracket 2 accommodates The cavity 21 is provided with a groove 22 corresponding to the protrusion 311. The protrusion 311 at least partially extends into the groove 22, which is equivalent to the protrusion 311 at least partially embedded in the groove 22. The groove 22 effectively avoids the protrusion 311 to achieve for space saving purposes. At this time, the top surface of the protrusion 311 is the bearing surface 3111 , the side of the battery bracket 2 close to the protrusion 311 is partially overlapped on the top surface of the protrusion 311 , and the protrusion 311 plays a role of partially supporting the battery bracket 2 . Since the battery accommodating cavity 21 is at least partially disposed corresponding to the protrusion 311, the protrusion 311 can also provide a partial support force for the cylindrical battery 1, and the battery accommodating cavity 21 occupies at least part of the upper space facing the protrusion 311, which is equivalent to The position range where the battery holder 2 can be provided with the battery accommodating cavity 21 can be extended to the space corresponding to the protrusion 311 , and the space utilization rate is reasonable and effective.

As shown in FIG. 4 , if the side of the battery accommodating cavity 21 of the battery holder 2 close to the fixing beam 31 is provided with a protrusion 311 , the protrusion 311 plays a role in strengthening the structure of the battery holder 2 , corresponding to the battery case 3 . The protrusion 311 is provided with a groove 22, and the protrusion 311 at least partially extends into the groove 22, which is equivalent to the protrusion 311 at least partially embedded in the groove 22, and the groove 22 effectively avoids the protrusion 311 to achieve space-saving. Purpose. At this time, the bottom surface of the groove 22 is the bearing surface 3111 , the protrusion 311 at least partially overlaps the bottom surface of the groove 22 , and the groove 22 plays a role of partially supporting the battery bracket 2 . Because the battery accommodating cavity 21 is at least partially disposed on the protrusion 311 , the position range corresponding to the battery holder 2 where the battery accommodating cavity 21 can be provided can be extended to the protrusion 311 , so that the battery holder 2 can be provided with a larger number of positions. There are many battery accommodating cavities 21 to improve space utilization.

It should be noted that the protrusion 311 and the battery bracket 2 can be integrally formed in a structure, which reduces the steps of assembling parts and saves the production cost. The groove 22 is specifically a notch provided on the top of the battery box 3 , so that the protrusion 311 can be directly placed in the groove 22 .

In one embodiment, the protrusion 311 is snapped into the groove 22 . The size and shape of the protrusion 311 and the groove 22 are matched. By setting the protrusion 311 to be clamped in the groove 22, the fixing between the battery box 3 and the battery bracket 2 is realized, and the battery box 3 and the battery bracket 2 are ensured. connection strength between.

In one embodiment, the protrusion 311 is adhered to the inner wall of the groove 22 . Coat each side of the protrusion 311 and/or each inner wall of the groove 22 with an adhesive layer, the protrusion 311 and the groove 22 provide a setting position for the adhesive layer, increase the coating area of the adhesive layer, and realize the battery box 3 and The fixing between the battery brackets 2 ensures the connection strength between the battery box 3 and the battery bracket 2 .

It should be noted that, the battery box 3 and the battery bracket 2 may only be fixed by snap connection, or the battery box 3 and the battery bracket 2 may only be fixed by adhesive bonding, or the battery box 3 and the battery bracket 2 may be fixed by only bonding. Adhesion and snap-fit can be adopted at the same time, so as to further enhance the fixing effect between the battery box 3 and the battery bracket 2 . In some embodiments, the positions where the battery box 3 and the battery bracket 2 are in contact with each other can also be connected by welding, and the specific connection form is not limited, and can be adjusted according to actual production needs.

In one embodiment, as shown in FIG. 5 , the battery box 3 includes a bottom plate assembly 33 for carrying the battery tray 2 . Specifically, the base plate assembly 33 includes a lower base plate (not shown in the figure), a cooling plate (not shown in the figure) and a bottom guard plate (not shown in the figure) sequentially arranged from top to bottom. Battery bracket 2, a cooling plate is arranged between the lower bottom plate and the bottom shield, the bottom shield is used to carry the cooling plate and protect the cooling plate, and the cooling channel in the cooling plate is used for the battery bracket 2 and the cylinder Heat dissipation and cooling of battery 1.

In one embodiment, the battery box 3 further includes a frame 34 . The frame 34 is arranged on the bottom plate assembly 33 and is arranged around the battery bracket 2 , and the frame 34 is used to protect the surrounding of the battery bracket 2 .

In one embodiment, the fixed beam 31 is disposed on the bottom plate assembly 33 , and the fixed beam 31 may be a beam of the frame 34 or a side beam of the frame 34 or a middle partition beam, and the specific beam of the fixed beam 31 is not limited in this embodiment. , which can be adjusted according to actual production needs.

In one embodiment, as shown in FIGS. 6-7 , an extension plate 23 is provided on the side of the battery bracket 2 close to the fixing beam 31 , and the extension plate 23 is arranged on the upper surface of the fixing beam 31 .

Specifically, there is a protrusion 311 on the side of the fixed beam 31 close to the battery bracket 2 , and the cross section of the protrusion 311 is a "ji"-shaped structure, which can not only strengthen the structure of the fixed beam 31, but also realize the bearing The function of the surface 3111 realizes the overlapping and bearing of the battery bracket 2 . An extension plate 23 is provided on the side of the battery bracket 2 close to the fixed beam 31, and the extension plate 23 is arranged on the upper surface of the fixed beam 31 to realize the connection and fixation between the battery bracket 2 and the fixed beam 31, which is equivalent to the extension plate 23 increases the contact area between the battery bracket 2 and the fixing beam 31 , and improves the fixing effect between the battery bracket 2 and the fixing beam 31 .

In one embodiment, at least one of the sides of the extension plate 23 and the fixing beam 31 close to each other is provided with a bonding area, and the bonding area is used for fixing between the extension plate 23 and the fixing beam 31 . By setting the bonding area, the extension plate 23 and the fixed beam 31 are connected by bonding, so as to ensure the reliability of the connection between the extension plate 23 and the fixed beam 31 . Wherein, the bonding area can be coated with glue, or pasted with foam double-sided adhesive.

It can be understood that, in some embodiments, the extension plate 23 and the fixed beam 31 may also be connected by welding, or other methods such as bolt connection, as long as the fixing between the extension plate 23 and the fixed beam 31 can be achieved, both within the protection scope of this embodiment.

In one embodiment, the number of fixing beams 31 is multiple, which is used to separate the battery box 3 to form multiple accommodating cavities, multiple cylindrical batteries 1 are arranged to form sub-units, multiple sub-units are arranged to form battery units, and multiple The battery cells are arranged in the plurality of accommodating cavities at corresponding intervals.

Specifically, a plurality of cylindrical batteries 1 are spaced and arranged along the second direction to form a column of sub-units. For two adjacent sub-units, the center lines of the corresponding cylindrical batteries 1 are not straight lines parallel to the second direction. It is a broken line structure. Specifically, the odd-numbered cylindrical batteries 1 are arranged correspondingly, the even-numbered cylindrical batteries 1 are arranged correspondingly, and the adjacent two cylindrical batteries 1 are not arranged facing each other but are arranged in a staggered position, which saves space. The poles of two adjacent cylindrical batteries 1 in each group of subunits are electrically connected by bus bars.

The plurality of cylindrical batteries 1 are arranged along the second direction to form subunits, the plurality of subunits are arranged along the first direction, and the battery units form a similar rectangular matrix structure. The battery box 3 is divided into a plurality of accommodating cavities by the fixing beams 31 , the fixing beams 31 play a role of separating the inner cavities of the battery box 3 , and the plurality of accommodating cavities correspondingly provide accommodating spaces for a plurality of battery cells.

It can be understood that the plurality of cylindrical batteries 1 in the battery unit are in a mixed connection, and the cylindrical batteries 1 in the battery unit may also be connected only in series or only in parallel.

In one embodiment, the battery brackets 2 corresponding to at least two adjacent battery units are integrally formed, and the battery brackets 2 corresponding to at least two adjacent battery units are connected by an extension plate 23 .

Since each battery bracket 2 supports one battery unit correspondingly, a plurality of battery brackets 2 are connected into an integral structure under the action of the intermediate connection of the extension plate 23 . It can be understood that the extension plate 23 also functions as a separator for separating the battery cells to a certain extent.

It should be noted that, the battery bracket 2 and the extension plate 23 can be integrally formed into a structure, which reduces the steps of assembling parts and reduces the production cost.

In one embodiment, as shown in FIG. 7 , the battery device further includes a lifting lug assembly 5 , and the lifting lug assembly 5 is connected to the fixing beam 31 . The fixing beam 31 provides an installation position for the lifting lug assembly 5 to realize the connection between the lifting lug assembly 5 and the battery device. The lifting lug assembly 5 is used to facilitate the lifting of the battery device by the handling device. When the size or weight of the battery device is relatively large , which is safer than hand-carrying.

In one embodiment, as shown in FIGS. 6-8 , the fixing beam 31 is provided with a connecting hole 312 , the lifting lug assembly 5 is partially penetrated through the extension plate 23 and the connecting hole 312 , and the lifting lug assembly 5 is pressed against the extending plate 23 .

Specifically, the fixing beam 31 is provided with a connecting hole 312 in the middle, the extension plate 23 is provided with a mounting hole corresponding to the connecting hole 312, and the screw rod is passed through the bottom of the lifting lug body, and is passed through the mounting hole and the connecting hole 312 in sequence to realize the lifting Installation between the ear assembly 5 and the fixed beam 31 . If the diameter of the connecting hole 312 is relatively small and the diameter of the lifting lug body is relatively large, after the screw thread is connected to the connecting hole 312 , the end face of the lifting lug body on the side close to the fixing beam 31 will press against the extension plate 23 . The ear body plays the role of pressing the extension plate 23 , so that the extension plate 23 is sandwiched between the fixed beam 31 and the lifting lug body, further ensuring the fixing effect between the extension plate 23 and the fixed beam 31 .

In one embodiment, the extension plate 23 is provided with a through hole 231 , and the lifting lug assembly 5 is completely penetrated through the through hole 231 . The size of the through hole 231 is larger than the size of the lifting lug body in the lifting lug assembly 5, so that the lifting lug assembly 5 can completely pass through the through hole 231, and the through hole 231 plays the role of avoiding the lifting lug assembly 5, which is convenient for the lifting lug assembly. 5 is connected to the fixing beam 31 after passing through the extension plate 23 , which provides convenience for the installation of the lifting lug assembly 5 .

In one embodiment, the battery box 3 further includes a reinforcement member 32 , and the reinforcement member 32 is provided at the connection position between the lifting lug assembly 5 and the fixing beam 31 . By arranging a reinforcing member 32 at the connection position between the lifting lug body and the fixed beam 31 of the lifting lug assembly 5, the reinforcing member 32 plays a role in strengthening the structure of the connection position between the lifting lug body and the fixed beam 31, increasing the The fixing reliability between the lifting lug assembly 5 and the fixing beam 31 can realize the compensation effect of the connection strength.

In one embodiment, the reinforcement member 32 is completely penetrated through the through hole 231 , or the reinforcement member 32 at least partially extends to the extension plate 23 and presses against the extension plate 23 .

As shown in FIGS. 8-9 , if the outer dimension of the reinforcement member 32 is less than or equal to the inner wall size of the through hole 231, the reinforcement member 32 can completely pass through the through hole 231, and the through hole 231 plays a role in avoiding the reinforcement member 32, It is convenient for the reinforcement piece 32 to be connected with the fixing beam 31 after passing through the extension plate 23 , which provides convenience for the installation of the reinforcement piece 32 . At this time, the reinforcing member 32 is equivalent to being embedded in the through hole 231 , and the through hole 231 provides at least a part of the accommodating space for the reinforcing member 32 .

As shown in FIG. 9 , if the outer dimension of the reinforcement member 32 is larger than the inner wall size of the through hole 231 , the part of the reinforcement member 32 facing the through hole 231 can completely cover the through hole 231 , and the reinforcement member 32 extends beyond the edge of the through hole 231 . Part of the extension plate 23 will extend to the extension plate 23, and the extension part of the reinforcement member 32 is disposed on the extension plate 23. When the lifting lug assembly 5 is locked to the fixed beam 31, since the lifting lug assembly 5 will exert a pressing force on the reinforcement member 32, The extension part of the reinforcing member 32 is made to go beyond the through hole 231 to achieve the pressing against the extension plate 23 , which further increases the fixing strength between the extension plate 23 and the fixing beam 31 .

In one embodiment, the battery device includes a battery pack, and the battery pack can be a cylindrical battery module, or a plurality of cylindrical batteries can be directly placed in the battery box 3 without being grouped.

It should be noted that when the number of cylindrical batteries 1 is multiple, a group of cylindrical batteries 1 can be formed into a group of cylindrical batteries 1 in a certain order and then placed in the battery box 3, and fixed by end plates and side plates. When the plurality of cylindrical batteries 1 are directly arranged in the battery box 3, that is, there is no need to group the plurality of cylindrical batteries 1, at this time, the end plates and the side plates can be removed.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the inventive creations disclosed herein. This disclosure is intended to cover any modifications, uses, or adaptations of the present invention that follow the general principles of this disclosure and include common knowledge or practice in the art not disclosed by this disclosure means. The specification and example embodiments are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of protection of the present disclosure is limited only by the appended claims.

Claims (12)

1. A battery device, characterized in that, comprising: A battery holder (2) and a cylindrical battery (1), the battery holder (2) is provided with a battery accommodating cavity (21), and the battery accommodating cavity (21) is used for accommodating the cylindrical battery (1) ); A battery box (3), the battery box (3) includes a fixing beam (31), the fixing beam (31) has a bearing surface (3111), and the bearing surface (3111) is used to carry the battery bracket ( 2), the battery accommodating cavity (21) is at least partially facing the bearing surface (3111). 2 . The battery device according to claim 1 , wherein the number of the battery accommodating cavities ( 21 ) is plural, and the plurality of the battery accommodating cavities ( 21 ) are parallel to the fixing beams ( 31 ). 3 . Extension direction setting. 3. The battery device according to claim 1, wherein a protrusion (311) is provided on the side of the fixing beam (31) close to the battery bracket (2), and the battery bracket (2) is provided with a protrusion (311). ) of the battery accommodating cavity (21) corresponding to the protrusion (311) is provided with a groove (22), the protrusion (311) at least partially protrudes into the groove (22), the battery accommodating The cavity (21) is at least partially disposed corresponding to the protrusion (311), and the top surface of the protrusion (311) is the bearing surface (3111); and/or, A protrusion (311) is provided on the side of the battery accommodating cavity (21) of the battery bracket (2) close to the fixing beam (31), and the fixing beam (31) corresponds to the protrusion (311) A groove (22) is provided, the protrusion (311) at least partially protrudes into the groove (22), and the battery accommodating cavity (21) is at least partially provided in the protrusion (311), so The bottom surface of the groove (22) is the bearing surface (3111). 4 . The battery device according to claim 3 , wherein the protrusion ( 311 ) is clamped to the groove ( 22 ). 5 . 5. The battery device according to claim 3, wherein the protrusion (311) is adhered to the inner wall of the groove (22). 6. The battery device according to claim 1, characterized in that, an extension plate (23) is provided on the side of the battery bracket (2) close to the fixing beam (31), and the extension plate (23) It is arranged on the upper surface of the fixed beam (31). 7 . The battery device according to claim 6 , wherein at least one of the sides of the extension plate ( 23 ) and the fixing beam ( 31 ) that are close to each other is provided with a bonding area, and the bonding area Used for fixing between the extension plate (23) and the fixing beam (31). 8 . The battery device according to claim 6 , wherein the number of the fixing beams ( 31 ) is plural, and is used for partitioning the battery box ( 3 ) to form a plurality of accommodating cavities, and a plurality of accommodating cavities are formed. The cylindrical batteries (1) are arranged to form subunits, a plurality of the subunits are arranged to form a battery unit, and the plurality of battery units are arranged in the plurality of accommodating cavities at corresponding intervals; Wherein, the battery brackets (2) corresponding to at least two adjacent battery units are integrally formed, and the battery brackets (2) corresponding to at least two adjacent battery units are connected to each other through the extension plate (23). 9 . The battery device according to claim 6 , wherein the battery device further comprises a lifting lug assembly ( 5 ), and the lifting lug assembly ( 5 ) is connected to the fixing beam ( 31 ). 10 . 10 . The battery device according to claim 9 , wherein the fixing beam ( 31 ) is provided with a connecting hole ( 312 ), and the lifting lug assembly ( 5 ) is partially penetrated through the extension plate ( 23 ). 11 . and the connecting hole (312), the lifting lug assembly (5) is pressed against the extension plate (23). 11. The battery device according to claim 9, wherein the extension plate (23) is provided with a through hole (231), and the lifting lug assembly (5) is completely penetrated through the through hole (231) . 12 . The battery device according to claim 11 , wherein the battery box ( 3 ) further comprises a reinforcing member ( 32 ), and the reinforcing member ( 32 ) is provided on the lifting lug assembly ( 5 ) and the at the connection position between the fixed beams (31); the reinforcement member (32) is completely penetrated through the through hole (231), or the reinforcement member (32) extends at least partially to the extension plate (23) ) and press against the extension plate (23).

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