CN219226519U - Battery box and battery device - Google Patents

Abstract

The application relates to a battery box and a battery device, and relates to the field of batteries, comprising a box body and a box cover, wherein the box body is provided with an opening for placing a battery, and the box cover covers the opening of the box body; the box cover comprises at least two structural parts, and the at least two structural parts are spliced and fixed; wherein at least one of the at least two structural members is a plastic member. The structure piece concatenation through using plastics to make forms the case lid, has the effect that reduces battery box manufacturing cost.

Description

Battery box and battery device

Technical Field

The present disclosure relates to the field of batteries, and more particularly, to a battery case and a battery device.

Background

The minimum unit of the battery is a battery core, a group of battery cores are combined in a serial or parallel mode, and a single battery monitoring and managing device is additionally arranged to form a battery module; the plurality of battery modules are commonly controlled or managed by the battery management system and the thermal management system to form a battery pack.

The battery pack generally comprises a box body, a box cover and a plurality of battery modules, wherein the battery modules are fixed on the box body, and the battery modules are covered by the box cover and the box body. The box is a main bearing structural member of the battery pack, the battery module is fixed on the box, and the battery pack is fixed through the box, so that the box is required to have good structural strength. The case lid is connected with the box detachable, mainly used covers the battery module.

The existing box cover structure is mainly used for being matched with a box body and used for covering a battery module, and the production cost of the box cover needs to be reduced as much as possible.

Disclosure of Invention

The application provides a battery box and battery device, reduces the manufacturing cost of battery box.

The application provides a battery box, which comprises a box body and a box cover, wherein the box body is provided with an opening for placing a battery, and the box cover covers the opening of the box body; the box cover comprises at least two structural parts, and the at least two structural parts are spliced and fixed; wherein at least one of the at least two structural members is a plastic member.

In the technical scheme, the structural part made of plastic is used for reducing the cost of the box cover; compared with the integrally formed box cover, the spliced structural member can assemble the box cover after the box cover is produced in a split mode, and the processing cost of the box cover is reduced; meanwhile, the structural member made of plastic is light in weight, has good insulativity, is insensitive to external temperature change, is not easy to conduct heat and is not easy to form condensation; the splice between the structure is fixed, is difficult for producing stress concentration when being heated, and when partial structure breaks down, can carry out the individual change to the structure, reduces the maintenance cost in battery box later stage.

The application also provides a battery device, which comprises a battery and a battery box, wherein the battery is positioned in the battery box.

In the technical scheme, the battery device is spliced by the structural members to form the battery box, so that the cost of the battery device is reduced, and the later maintenance is convenient.

Drawings

FIG. 1 is a schematic view showing the overall structure of a case and a cover of a battery pack according to an embodiment;

FIG. 2 is an exploded view showing the structural relationship of the cover plate to the side panels in the case cover in one embodiment;

fig. 3 is an enlarged view at a in fig. 2.

1. A cover plate; 11. an inner plate; 111. a plug-in groove; 112. a long plate; 113. a connecting strip; 12. an outer plate; 121. bending edges; 122. a plug strip; 13. longitudinal reinforcing ribs; 2. a side plate; 21. splice plates; 22. a fixing plate; 23. transverse reinforcing ribs; 3. a box body.

Detailed Description

The present application is further described in detail below by way of the accompanying drawings and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.

The embodiment of the application discloses a battery box. Referring to fig. 1, the battery pack is configured to be mounted on a battery, and the battery is fixedly covered to form a battery pack.

The battery box in the embodiment is used in an energy storage box of an energy storage power station, and when the battery box is used, a plurality of battery boxes are fixed in one box body to be used as the energy storage power station. In other embodiments, a battery compartment using the case lid is used in the energy storage compartment.

Referring to fig. 2, the battery case includes a case body provided with an opening for receiving a battery and a case cover covering the opening of the case body.

The box is rectangular in this embodiment, and a plurality of batteries are placed into the box through the opening of the box, fixedly connected with the box, and in conductive communication with the electrical components in the box. The opening of the box body is covered by the box cover, so that a space for accommodating the battery is formed by the battery box, and the battery is covered.

The box cover comprises at least two structural members, and the at least two structural members are spliced and fixed; wherein at least one of the at least two structural members is a plastic member.

The following is an exemplary illustration of possible forms of the structure.

In this embodiment, the case cover includes five structural members, one of which is the cover plate 1, and the other four of which are the side plates 2.

In other embodiments, the cover comprises two structural members, wherein the two structural members are spliced and connected, one structural member is a side plate 2, and the other structural member is a cover body lacking one side plate 2.

In other embodiments, the case cover comprises three structural members, wherein two structural members are two opposite side plates 2, and the other structural member is a cover plate 1 and two side plates 2 fixed with the cover plate 1.

In other embodiments, the case cover comprises three structural members, wherein two structural members are two side plates 2 adjacently arranged, and the other structural member is a cover plate 1 and two side plates 2 fixed with the cover plate 1.

In other embodiments, the cover comprises four structural members, three of which are side plates 2, and the other of which is a cover plate 1 and one side plate 2 fixed to the cover plate 1.

In other embodiments, the cover comprises four structural members, two of which are side panels 2, one of which is two adjacent side panels 2, and the other of which is a cover 1.

In each of the above embodiments, at least one of the structural members is a plastic member. When the number of the structural parts is two, one or two plastic structural parts can be adopted; when the number of the structural parts is three, the number of the structural parts which are plastic can be one, two or three; when the number of structural members is four, the number of structural members which are plastic can be one, two, three or four; when the structural members are five, there may be one, two, three, four or five of the number of structural members that are plastic.

As an alternative, the structural members are all plastic members.

Specifically, the structural member can be made of one, two, three or more of polypropylene, high-temperature resistant polyester, polyimide, polystyrene or other high-molecular plastics; the same structural member is made of the same material.

The structure made of plastic parts can reduce the amount of the box cover, is convenient for the installation and movement of the box cover, has good insulativity, is insensitive to temperature change, has low heat conductivity coefficient and is not easy to generate condensation; the energy storage box is particularly suitable for the energy storage box with low requirement on the strength of the box cover of the battery box.

Referring to fig. 2, as an alternative, the cover plate 1 and the four side plates 2, which enclose the cover structure, are all plastic pieces.

Referring to fig. 2, at least one side plate 2 is a splice plate 21, the splice plate 21 is fixedly spliced with two adjacent side plates 2 of the splice plate 21, the splice plate 21 is fixedly spliced with the cover plate 1, and one end of the other side plates 2 is fixedly connected with the cover plate 1.

In other embodiments, one splice plate 21 is provided in each of the four side plates 2, and the remaining three side plates 2 are fixedly connected to the cover plate 1. Two sides of the splice plate 21 are respectively spliced and fixed with two side plates 2 adjacent to the splice plate 21 in one-to-one correspondence, one side of the splice plate 21 is spliced and fixed with the cover plate 1, the other side of the splice plate 21 is fixedly connected with the box body 3, and one ends, far away from the cover plate 1, of the other three side plates 2 are fixedly connected with the box body 3.

The following describes a case where the four side plates 2 include two splice plates 21. Two splice plates 2 are respectively arranged, and the two splice plates are opposite or adjacent; or splice plates having three; or splice plates, have four.

Referring to fig. 2, as an alternative, the four side plates 2 include at least one set of splice plates 21, and one set of splice plates 21 is two splice plates 21 disposed opposite to each other.

Referring to fig. 2, as an alternative, four side plates 2 include a set of splice plates 21, and the other two side plates 2 are fixing plates 22 fixedly connected to the cover plate 1.

In this embodiment, two splice plates 21 are disposed opposite to each other, and two fixing plates 22 are disposed opposite to each other. Among the four sides of any splice plate 21, two sides are spliced and fixed with two fixed plates 22 in one-to-one correspondence, one side is spliced and fixed with the cover plate 1, and the other side is used for being detachably and fixedly connected with the box body 3.

The two splice plates 21 which are oppositely arranged can ensure that the three sides of the splice plates 21 are fixedly connected with the cover plate 1 and the fixing plate 22 which are mutually fixed, and the overall structural strength of the box cover is relatively high.

In other embodiments, the four side plates 2 comprise three splice plates 21 and a fixing plate 22 fixedly connected to the cover plate 1. Of the three splice plates 21, two splice plates 21 are oppositely arranged as a group of splice plates 21; the other splice plates 21 are respectively spliced and connected with the two splice plates 21.

In another embodiment, the side plate 2 includes two sets of splice plates 21, four splice plates 21 are spliced and fixed with each other, and four splice plates 21 are spliced and fixed with the cover plate 1.

In another embodiment, the four side plates 2 include two splice plates 21 and two fixing plates 22, the two splice plates 21 are adjacent, the two splice plates 21 are spliced and fixed, one ends of the two splice plates 21, which are opposite to the two splice plates 21 and spliced with each other, are respectively spliced and fixed with the two fixing plates 22 in a one-to-one correspondence, and the two fixing plates 22 are respectively fixedly connected with the cover plate 1.

The splice fixation of the splice plate 21 will be described below.

Referring to fig. 1, as an alternative, the splicing and fixing of the splice plate 21 and the cover plate 1 is shown as that the splice plate 21 and the cover plate 1 are spliced and then fixed, and the fixing manner may be hot melt fixing, riveting fixing or bolt fixing.

In this embodiment, the splice plate 21 is fixedly connected with the cover plate 1 by using bolts, the cover plate 1 is provided with threaded holes, and the bolts penetrate through the splice plate 21 to be in threaded connection with the threaded holes on the cover plate 1. In other embodiments, the splice plate 21 is riveted to the cover plate 1 or the splice plate 21 is heat staked to the cover plate 1.

The splice plate 21 and the other side plates 2 are fixedly connected by bolts after the splice plate 21 and the fixing plate 22 or the splice plate 21 and the splice plate 21 are spliced in this embodiment.

In this embodiment, a cylindrical protrusion is fixed on the cover plate 1, the cylindrical protrusion is located on the surface of the cover plate 1 facing the inner side of the case cover, and a threaded hole connected with a bolt is formed in the cylindrical protrusion. The side plate 2 is fixedly provided with a columnar bulge, the columnar bulge is positioned on the surface of the side plate 2 facing the inner side of the box cover, and the columnar bulge is provided with a threaded hole connected with a bolt.

The splice plate 21 and the cover plate 1 or other side plates 2 are spliced and formed, the process is simple, the assembly between the box cover and parts is convenient, and the production cost is low; when the battery box is used, heat generated by the battery box heats the box cover to raise the temperature of the box cover, and the spliced plastic parts can reduce stress concentration generated by deformation in the heating process. The side plate 2 damaged by a certain block can be replaced in a targeted manner in the later stage of the box cover, so that the box cover is convenient to overhaul and maintain. The spliced box cover has relatively low tightness, and is suitable for use in an energy storage box with low requirements on the sealing performance of the battery box.

Referring to fig. 2, as an alternative, splice plates 21 are fixed to end surfaces of the cover plate 1 and the fixing plate 22.

Specifically, the cover plate 1 and the fixing plate 22 are located between the two splice plates 21.

In another embodiment, the outer side surface of the splice plate 21 is fixed to the inner side surfaces of the cover plate 1 and the fixing plate 22, wherein the outer side surface is a side surface in the thickness direction of the splice plate 21, and the inner side surface is a surface facing the inner cavity of the case cover.

Referring to fig. 2, as an alternative, the structural member at the front end of the case cover is a plastic member; the front end of the case cover is one side of the case cover, which is provided with an electric connector.

The structural member at the front end of the case cover is required to be provided with a nameplate, identification information and a part of electric connectors. When the case cover is provided with the two side plates 2, the electric connectors are arranged on the two side plates, and the front end of the case cover is provided with the side plates 2 with more electric connectors.

The following describes the fixed connection between the cover plate 1 and the fixing plate 22.

As an alternative, two fixing plates 22 are integrally formed with the cover plate 1, not shown in the drawings.

Specifically, the two fixing plates 22 and the cover plate 1 are integrally injection-molded using the same mold and then cooled to form. The die used by the fixing plate 22 and the cover plate 1 has a simple structure compared with the die used for integrally injection molding the cover plate; after the two fixing plates 22 and the cover plate 1 are integrally formed, the connection between the fixing plates 22 and the cover plate 1 is stable.

In other embodiments, the fixing plate 22 has one fixing plate 22 integrally formed with the cover plate 1. In other embodiments, the fixing plates 22 have three fixing plates 22 integrally formed with the cover plate 1, and the three fixing plates 22 are integrally formed therebetween.

The following exemplifies the structure of the cover plate 1.

Referring to fig. 2, as an alternative, the cover plate 1 includes at least one outer plate 12, and at least one outer plate 12 is integrally formed with a fixing plate 22.

In this embodiment, the cover plate 1 includes two outer plates 12, the cover plate 1 further includes an inner plate 11, the inner plate 11 is located between the two outer plates 12, the inner plate 11 is fixedly connected with the two outer plates 12, and the outer plates 12 and the two fixing plates 22 are integrally formed.

The outer panel 12 and the two fixing plates 22 are injection molded using the same mold. The integrated cover plate 1 and the fixed plate 22 can ensure the connection strength of the cover plate 1 and the fixed plate 22, the inner plate 11 and the two outer plates 12 are fixedly connected to form the cover plate 1, the size of a mould used when the cover plate 1 and the fixed plate 22 are formed can be reduced, and the processing cost of the cover plate 1 is reduced.

Further, the connection portion between the outer plate 12 and the fixing plate 22 is in arc transition, and a reinforcing rib is provided, the reinforcing rib is located on the surface of the outer plate 12 facing the inner side of the box cover, and the reinforcing rib can enhance the connection strength between the outer plate 12 and the fixing plate 22.

In other embodiments, the cover plate 1 includes two outer plates 12, where the two outer plates 12 are integrally formed with two fixing plates 22 in a one-to-one correspondence, and the two outer plates 12 are connected in a plugging manner.

In other embodiments, the cover 1 is an outer plate 12, one fixing plate 22 is integrally formed with the outer plate 12, and the other fixing plate 22 is fixedly connected with the outer plate 12.

As an alternative, referring to fig. 3, the outer plate 12 is plug-connected with the inner plate 11. Specifically, the inner plate 11 is provided with insertion grooves 111 toward both ends of the two outer plates 12, respectively, and both ends in the longitudinal direction of the insertion grooves 111 penetrate both ends in the longitudinal direction of the inner plate 11. Opposite ends of the two outer plates 12 are each provided with a plug strip 122 which can be inserted into the plug groove 111.

In other embodiments, the insertion groove 111 includes a plurality of grooves spaced apart along the length of the inner plate 11 and located on the end surface of the outer plate in the width direction. The plugging strip 122 is disposed corresponding to the plugging slot 111.

The molding of the insertion groove 111 is described below.

Referring to fig. 3, in the present embodiment, the inner panel 11 includes a long panel 112 and two connection bars 113.

Two connecting strips 113 are respectively fixed at two ends of the long plate 112 for being connected with the outer plate 12, the connecting strips 113 are positioned on the surface of the long plate 112 facing the inner side of the box cover, the cross section of each connecting strip 113 is L-shaped, the L-shaped opening of each connecting strip 113 faces the long plate 112, the L-shaped openings of the two connecting strips 113 are opposite, and in sum, the L-shaped openings of the connecting strips 113 and the end parts of the width of the long plate 112 form plug grooves 111 with rectangular cross sections.

The arrangement of the connecting strips 113 can reduce the thickness of the long plate 112 and lighten the mass of the inner plate 11, and the arrangement of the connecting strips 113 can strengthen the structural strength of the inner plate 11 and improve the bending deformation resistance of the inner plate 11 along the length direction thereof.

In other embodiments, the insertion groove 111 is a groove formed on a side surface of the inner plate 11, and the cross section of the groove is trapezoidal, triangular or arc.

Referring to fig. 3, the arrangement of the plug strip 122 is described below, in which the end of the outer panel 12 for connection with the inner panel 11 has a bent edge 121 bent toward the inside of the case cover, the plug strip 122 is fixed to the bent edge 121, and when the plug strip 122 is inserted into the plug groove 111, the surfaces of the outer panel 12 and the inner panel 11 facing away from the inside of the case cover are flush.

In other embodiments, the two ends of the inner plate 11 are respectively provided with the plugging strips 122, and the opposite ends of the two outer plates 12 are respectively provided with the plugging grooves 111 for accommodating the plugging strips 122.

In other embodiments, the inner plate 11 is inserted into one outer plate 12 and integrally formed with the other outer plate 12.

Referring to fig. 3, as an alternative, the cover plate 1 is fixedly provided with longitudinal reinforcing ribs 13 along the length direction of the cover plate 1.

The length of the longitudinal reinforcing ribs 13 is along the length direction of the cover plate 1, and a plurality of longitudinal reinforcing ribs 13 are arranged at intervals along the width direction of the cover plate 1. The longitudinal ribs 13 may be semicircular, circular arc, square or other shape in cross section. The longitudinal reinforcing ribs 13 are integrally formed with the cover plate 1. The longitudinal ribs 13 serve to increase the structural strength of the cover plate 1.

Referring to fig. 2, as an alternative, lateral ribs 23 are fixed to the side plates 2 along the length direction of the side plates 2.

Specifically, the lateral reinforcing ribs 23 are provided on the surface of the side plate 2 facing the inside of the case cover. The lateral reinforcing ribs 23 are arranged at intervals in a direction away from the cover plate 1, and in this embodiment, three lateral reinforcing ribs 23 are provided. The cross section of the transverse stiffener 23 may be semicircular, circular arc, square or other shape. The lateral reinforcing ribs 23 are integrally formed with the side plates 2. The lateral reinforcing ribs 23 serve to improve structural strength of the side plates.

As an alternative, the two ends of the transverse reinforcing rib 23 are provided with threaded holes for fixedly connecting with the splice plate 21, and the transverse reinforcing rib 23 facilitates the splice fixation of the splice plate 21 while improving the structural strength of the side plate 2.

Referring to fig. 1, the embodiment also discloses a battery device, which comprises a battery and a battery box, wherein the battery is positioned in the battery box.

The cover body of the battery device is spliced by a plurality of structural members, the structural members can be assembled and fixed after being processed independently, and meanwhile, the battery box of the battery device is maintained in the later period.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc. are based on the directions or positional relationships in the working state of the present application, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless explicitly specified and limited otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The present application has been described in connection with the preferred embodiments, but these embodiments are merely exemplary and serve only as illustrations. On the basis of this, many alternatives and improvements can be made to the present application, which fall within the scope of protection of the present application.

Claims (11)

1. A battery box is characterized by comprising a box body and a box cover, wherein,

the box body is provided with an opening for placing a battery, and the box cover covers the opening of the box body;

the box cover comprises at least two structural parts, and the at least two structural parts are spliced and fixed; wherein at least one of the at least two structural members is a plastic member.

2. The battery box of claim 1, wherein the structural members are all plastic members.

3. The battery box of claim 1, wherein the box cover comprises five structural members, one of the structural members being a cover plate, and the remaining four structural members being side plates; wherein,,

at least one side plate is a splice plate, the splice plate is fixedly spliced with two adjacent side plates of the splice plate, and the splice plate is fixedly spliced with the cover plate;

and one end of the other side plate is fixedly connected with the cover plate.

4. A battery box according to claim 3, wherein four of the side plates include at least one set of splice plates, the set of splice plates being two of the splice plates disposed opposite each other.

5. The battery box of claim 4, wherein four of the side plates comprise a set of splice plates and the other two of the side plates are fixed plates fixedly connected to the cover plate.

6. The battery box of claim 5, wherein the cover plate includes at least one outer plate, at least one of the outer plates being integrally formed with one of the fixing plates.

7. The battery box of claim 6, wherein the cover plate further comprises an inner plate that is plug-in connected with the outer plate.

8. The battery box of claim 5, wherein the splice plate is fixed to end surfaces of the cover plate and the fixing plate.

9. The battery box according to any one of claims 1 to 8, wherein the structural member at the front end of the box cover is a plastic member; the front end of the box cover is one side of the box cover, which is provided with an electric connector.

10. A battery box according to claim 3, wherein the splice plate is heat-fused, riveted, or bolted to the cover plate.

11. A battery device comprising a battery, characterized by further comprising the battery box of any one of claims 1 to 10, said battery being located within said battery box.

Images