CN220492067U - Battery box and battery pack - Google Patents

Abstract

The embodiment of the application discloses battery box and battery package belongs to battery technical field, and this battery box has two first directions, second direction and the third direction that intersect, and the battery box includes: a first beam extending in a first direction; a second beam extending in a second direction; and a connection assembly including a sleeve and a connector; the first beam is intersected with the second beam, the first beam penetrates through the second beam, the sleeve penetrates through the second beam along a third direction, and the connecting piece penetrates through the sleeve and connects the first beam and the second beam. So, link together through the coupling assembling that connecting piece and sleeve are constituteed between first roof beam and the second roof beam, replaced among the prior art through the connected mode of splice welding between first roof beam and the second roof beam, avoid splice welding to lead to battery box welding part deformation, influence the stability of battery box, and then influence the problem of the safety of battery package.

Description

Battery box and battery pack

Technical Field

The application belongs to the technical field of batteries, and particularly relates to a battery box and a battery pack.

Background

The battery pack is a core component of an electric automobile driving system and is used for providing electric driving for the electric automobile. As a supporting member in the battery pack, the battery case is fabricated by welding a plurality of sub-members. However, the welding mode of splice welding easily causes deformation of the welding part of the battery box body, influences the stability of the battery box body, and further influences the safety of the battery pack.

Disclosure of Invention

The utility model aims to: the embodiment of the application provides a battery box body, which aims to solve the problems that a welding part of the battery box body is easily deformed, the stability of the battery box body is influenced and the safety of a battery pack is further influenced in the welding mode of splice welding in the prior art; it is another object of embodiments of the present application to provide a battery pack.

The technical scheme is as follows: the embodiment of the application a battery box has two first directions, second direction and the third direction that intersect, the battery box includes:

a first beam extending in the first direction;

a second beam extending in the second direction; and

a connection assembly comprising a sleeve and a connector;

the first beam is intersected with the second beam, the first beam penetrates through the second beam, the sleeve penetrates through the second beam along the third direction, and the connecting piece penetrates through the sleeve and connects the first beam with the second beam.

In some embodiments, the second beam is internally provided with a plurality of reinforcing bars arranged along the third direction, and the sleeve extends through all the reinforcing bars along the third direction.

In some embodiments, the sleeve has a diameter-changing portion at a position where the sleeve contacts the reinforcing rib, the diameter-changing portion having a maximum radial dimension in a radial direction of the sleeve so that the diameter-changing portion abuts the reinforcing rib.

In some embodiments, the second beam is provided with a connecting through hole penetrating along the third direction, and the sleeve is penetrated in the connecting through hole along the third direction;

wherein, the diameter of connecting through-hole has minimum to be d mm, the diameter of sleeve has minimum to be d mm, the battery box satisfies: d is 0 < d ₂ -d ₁ ≤1。

In some embodiments, the second beam is further provided with a recess through which the first beam passes to pass in the second beam or through which the second beam passes to pass in the first beam.

In some embodiments, the recess has a bottom surface, and the plurality of ribs includes a bottom rib connected to the bottom surface;

wherein the sleeve has a first face adjacent the recess and the bottom rib has a second face remote from the recess, the first face being connected to the second face.

In some embodiments, the number of connection assemblies is multiple, and the battery case further includes:

a front beam extending in the first direction, the front beam being connected to the second beam by the connection assembly;

a rear beam extending in the first direction, the rear beam being connected to the second beam by the connection assembly;

the first beam is disposed between the front beam and the rear beam.

In some embodiments, the battery case further comprises:

and the side beams are arranged along the second direction in an extending way, the side beams are welded with the first beams, the side beams are welded with the front beams, and the side beams are welded with the rear beams.

In some embodiments, the hardness of the sleeve is greater than the hardness of the second beam.

Correspondingly, the battery pack provided by the embodiment of the application comprises the battery box body according to any one of the embodiments, wherein the battery box body is used for accommodating a battery.

The beneficial effects are that: compared with the prior art, the battery box of this application embodiment, first roof beam is crossing with the second roof beam, and in first roof beam was worn to locate the second roof beam, the sleeve was worn to locate in the sleeve and connect first roof beam and second roof beam along the third direction and is run through the second roof beam, connecting piece. So, link together through the coupling assembling that connecting piece and sleeve are constituteed between first roof beam and the second roof beam, replaced among the prior art through the connected mode of splice welding between first roof beam and the second roof beam, avoid splice welding to lead to battery box welding part deformation, influence the stability of battery box, and then influence the problem of the safety of battery package.

Compared with the prior art, the battery pack of the embodiment of the application can include all technical features and beneficial effects of the battery box body, and the description is omitted here.

Compared with the prior art, the electric equipment of the embodiment of the application can comprise all technical characteristics and beneficial effects of the battery pack, and the description is omitted here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a battery box according to an embodiment of the present disclosure;

fig. 2 is a partially enlarged schematic view of a portion a of the battery case of fig. 1;

FIG. 3 is a schematic cross-sectional view taken along line B-B in FIG. 2;

FIG. 4 is a schematic cross-sectional view of the first beam and the second beam of FIG. 2 along line B-B;

FIG. 5 is a schematic view of a part of the enlarged structure of the portion C in FIG. 4;

FIG. 6 is a schematic diagram showing a cross-sectional structure of the first beam and the second beam along line B-B in FIG. 2;

fig. 7 is an assembly schematic diagram of a sleeve of a battery box provided in an embodiment of the present application;

reference numerals: 100-a first beam; 200-a second beam; 210-reinforcing ribs; 211-bottom reinforcing ribs; 2111-a second side; 220-connecting through holes; 230-recess; 231-bottom surface; 300-a connection assembly; 310-sleeve; 311-diameter-variable portion; 312-first side; 320-connecting piece; 400-front beam; 500-rear beam; 600-side beams; a first direction x; a second direction y; and a third direction z.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the present application. In the description of the present application, the meaning of "a plurality" is two or more, and at least one means may be one, two or more, unless explicitly defined otherwise.

The term "parallel" in the present application includes not only the case of absolute parallelism but also the case of approximately parallelism as conventionally recognized in engineering, for example, "parallel" refers to a state in which straight lines form an angle of-1 ° to 1 ° with respect to straight lines, straight lines form an angle of plane with respect to plane, or plane with respect to plane; meanwhile, "vertical" includes not only the case of absolute vertical but also the case of substantially vertical as conventionally recognized in engineering, for example, vertical "refers to a state in which an angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89 ° to 91 °. The distances are equal or the angles are equal, not only the absolute equal condition is included, but also the general equal condition of the conventional cognition in engineering is included, and certain errors can exist, such as a state that the tolerance range is between-1% and 1%.

The applicant has noted that in existing battery cases it is necessary to tailor weld a plurality of sub-components. However, the welding mode of splice welding easily causes deformation of the welding part of the battery box body, influences the stability of the battery box body, and further influences the safety of the battery pack.

In view of this, this application embodiment provides a battery box, and the coupling assembling that constitutes through connecting piece and sleeve links together between the first roof beam of this battery box and the second roof beam, has replaced among the prior art through the connected mode of splice welding between first roof beam and the second roof beam, avoids splice welding to lead to battery box welding position deformation, influences the stability of battery box, and then influences the problem of the safety of battery package.

Referring to fig. 1, fig. 2 and fig. 3 together, fig. 1 illustrates a schematic perspective view of a battery case provided in an embodiment of the present application, fig. 2 illustrates a schematic enlarged partial structure of a portion a of the battery case in fig. 1, and fig. 3 illustrates a schematic sectional structure along a line B-B in fig. 2; in this embodiment, the battery box has a first direction x, a second direction y and a third direction z intersecting each other, and the battery box includes a first beam 100, a second beam 200 and a plurality of connection assemblies 300, where the first beam 100 extends along the first direction x; the second beam 200 is extended in the second direction y; and the connection assembly 300, the connection assembly 300 includes a sleeve 310 and a connection member 320.

In some embodiments, the first direction x, the second direction y, and the third direction z are perpendicular to each other and do not simultaneously lie in the same plane.

Specifically, in some embodiments, the battery compartment generally includes a plurality of beams, each beam being positioned differently, divided into sides of the battery compartment and an interior of the battery compartment. The first beam 100 and the second beam 200 in this application refer to beams disposed inside the battery case. In some embodiments, the first beam 100 intersects the second beam 200, with the first beam 100 passing through the second beam 200.

In the prior art, the connection between the first beam 100 and the second beam 200 is welding, however, the strength of the welding depends on the nature of the welding material, the process and quality of the welding, etc., and if the welding is incorrect or the welding is performed using a low quality material, the strength of the welding site may be significantly reduced; meanwhile, the welding process requires the use of gas, arc or flame, etc., which may expose the welding site to air or other environments, such as high temperature, high humidity or environments containing corrosive gas, may affect the performance of the welding site; in addition, the welding process requires heating and cooling of the metal, which may cause damage or deformation to the raw materials of the beam. Therefore, the welding is not sufficient to secure the stability of the connection between the first beam 100 and the second beam 200. To this end, the first beam 100 and the second beam 200 are connected by at least part of the connection assembly 300 in the present application. Specifically, the sleeve 310 penetrates the second beam 200 in the third direction z, and the connector 320 penetrates the sleeve 310 and connects the first beam 100 and the second beam 200. In this way, instead of the existing welding method, the stability of the connection between the first beam 100 and the second beam 200 is improved.

It is understood that in some embodiments, the connector 320 is disposed through the sleeve 310 and connects the first beam 100 and the second beam 200, and the connector 320 may be disposed through the sleeve 310 with one end abutting against the side of the second beam 200 away from the first beam 100 and the other end being inserted into the first beam 100.

Referring to fig. 4 and 5 in combination, fig. 4 is a schematic cross-sectional view of the first beam and the second beam along line B-B in fig. 2, and fig. 5 is a schematic enlarged partial view of part C in fig. 4. In the embodiment of the present application, the second beam 200 is provided with a plurality of reinforcing ribs 210 arranged along the third direction z inside, and the sleeve 310 penetrates all the reinforcing ribs 210 along the third direction z. It is important for the battery pack to reduce the weight while ensuring the performance, and therefore, the battery case should also reduce the weight while ensuring the safety and the performance. In this application, by arranging the reinforcing ribs 210 in the inside of the second beam 200, the weight of the second beam 200 and thus the battery case can be reduced while securing the strength of the second beam 200.

Specifically, in order to ensure the fit between the sleeve 310 and the reinforcing rib 210, the sleeve 310 has a diameter-variable portion 311 at a position where the sleeve 310 contacts the reinforcing rib 210, and the diameter-variable portion 311 has a maximum radial dimension in the radial direction of the sleeve 310 so that the diameter-variable portion 311 contacts the reinforcing rib 210. In this way, the interference fit connection is formed between the reducing part 311 and the reinforcing rib 210, so that the loosening between the sleeve 310 and the reinforcing rib 210 can be avoided, meanwhile, the connection strength between the sleeve 310 and the reinforcing rib 210 is increased, the connection strength between the first beam 100 and the second beam 200 is improved, and the stability and the load capacity of the whole battery box are improved; while the sleeve 310 is assembled with the second beam 200, the smaller diameter portion can be easily inserted into the second beam to guide the initial positioning of the sleeve 310 with the second beam 200, thereby facilitating assembly.

In other embodiments, the sleeve 310 may have a stepped cylindrical structure, with a larger diameter portion abutting the stiffener 210 and a smaller diameter portion for guiding insertion of the sleeve 310 into the second beam 200.

Referring to fig. 6, fig. 6 illustrates a second schematic cross-sectional structure of the first beam and the second beam along line B-B in fig. 2, where the second beam 200 is provided with a connection through hole 220 penetrating along a third direction z, and the sleeve 310 is penetrated in the connection through hole 220 along the third direction z; the diameter of the connection via 220 has a minimum value d ₁ mm, the diameter of the sleeve 310 has a minimum value d ₂ mm, the battery box body satisfies: d is 0 < d ₂ -d ₁ And is less than or equal to 1. So, also formed interference fit and connected between connecting hole 220 and sleeve 310, when avoiding taking place not hard up between sleeve 310 and the connecting hole 220, increase the joint strength between sleeve 310 and the connecting hole 220, promote the joint strength between first roof beam 100 and the second roof beam 200, promote the stability and the loadability of whole battery box.

In other embodiments, 0.3 < d ₂ -d ₁ And 0.6 to make the connection of the sleeve 310 with the second beam 200 more reliable.

Referring again to fig. 4 and 6, in the embodiment of the present application, the second beam 200 is further provided with a recess 230, such that the first beam 100 passes through the recess 230 to be disposed in the second beam 200, or the second beam 200 passes through the recess 230 to be disposed in the first beam 100, or it is understood that the first beam 100 is at least partially accommodated in the recess 230. In this way, an oversized connection in the third direction z is avoided when connecting between the first beam 100 and the second beam 200. The size of the entire battery case in the third direction z is further reduced.

In some embodiments, the recess 230 is arranged opposite the sleeve 310 along the third direction z, such that the connection assembly 300 can be inserted through the sleeve 310 and the first beam 100 to fixedly connect the first beam 100 and the second beam 200.

In some embodiments, a plurality of first beams 100 may be provided on the same second beam 200.

In other embodiments, multiple connection assemblies 300 may be disposed on the same second beam 200, and multiple connection assemblies 300 may be used to connect the same second beam 200 to one first beam 100, or multiple connection assemblies 300 may be used to connect the same second beam 200 to different first beams 100.

In some embodiments, one recess 230 is disposed opposite at least two sleeves 310, and in particular, it can be understood that connecting one first beam 100 with one second beam 200 by at least two connection assemblies 300 can improve connection reliability.

Referring again to fig. 5, in the embodiment of the present application, the recess 230 has a bottom surface 231, and the plurality of ribs 210 includes a bottom rib 211 connected to the bottom surface 231; the sleeve 310 has a first face 312 adjacent the recess 230 and the bottom rib 211 has a second face 2111 remote from the recess 230, the first face 312 being connected to the second face 2111. Thus, after the first surface 312 is connected with the second surface 2111, the sleeve 310 abuts against the bottom reinforcing rib 211, so that the sleeve 310 presses the bottom reinforcing rib 211, the sleeve 310 and the bottom reinforcing rib 211 are tightly connected together to form a whole, the strength and the rigidity of the sleeve 310 and the bottom reinforcing rib 211 are greatly improved, and loosening is avoided.

Referring again to fig. 1, in the embodiment of the present application, a portion of the connection assembly 300 may also be used to connect other components, and in particular, the battery case further includes a front beam 400 and a rear beam 500. In this embodiment, the front beam 400 and the rear beam 500 belong to beams disposed at the side of the battery box, and the connection between the first beam 100 and the front beam 400 and the connection between the first beam 100 and the rear beam 500 in the prior art are all welding, which has the disadvantages as described above. For this purpose, in the embodiment of the present application, the front beam 400 is disposed to extend along the first direction x, and the front beam 400 is also connected to the second beam 200 through the connection assembly 300; the rear beam 500 is disposed to extend in the first direction x, and the rear beam 500 is also connected to the second beam 200 through the connection assembly 300; the first beam 100 is disposed between the front beam 400 and the rear beam 500. In this way, the connection between the first beam 100 and the front beam 400 and the connection between the first beam 100 and the rear beam 500 are changed to the connection through the connection assembly 300, so that the existing welding mode is replaced, and the stability of the connection is improved.

Referring again to fig. 1, in the embodiment of the present application, the battery case further includes a side beam 600 extending along the second direction y, the side beam 600 is welded to the first beam 100, the side beam 600 is welded to the front beam 400, and the side beam 600 is welded to the rear beam 500. In this embodiment, the boundary beam 600 is also the beam of battery box avris, be connected between aforesaid first roof beam 100 and second roof beam 200, be connected between first roof beam 100 and the front roof beam 400, and be connected through coupling assembling 300 between first roof beam 100 and the back roof beam 500, for further promoting the stability of battery box, boundary beam 600 welds with first roof beam 100, boundary beam 600 welds with front roof beam 400, boundary beam 600 welds with back roof beam 500, at this moment boundary beam 600 welds with first roof beam 100, front roof beam 400 and back roof beam 500, the size that can reduce boundary beam 600 occupies, and then reduce the volume that the battery was bordured.

In other embodiments, the side beam 600 may be connected to the first beam 100, the front beam 400, and the rear beam 500 by the connection assembly 300.

Referring to fig. 7, fig. 7 illustrates an assembly schematic diagram of a sleeve of a battery case provided in an embodiment of the present application, in which the sleeve 310 needs to be forcibly pushed or rotatably installed into the second beam 200 along the third direction z, and in order to achieve an interference fit, the hardness of the sleeve 310 needs to be greater than that of the second beam 200 to ensure the quality and long-term use of the connection between the sleeve 310 and the second beam 200.

Accordingly, the battery pack provided in the embodiments of the present application includes all technical features and beneficial effects of the above battery case, which are not described herein again, and the battery case is used for accommodating a battery.

Correspondingly, the embodiment of the application provides electric equipment, which comprises the battery pack provided by the embodiment. The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or an extended range automobile and the like; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric equipment in particular. It can be appreciated that the electrical equipment includes all technical features and beneficial effects of the above-mentioned battery box, and the battery box is used for holding the battery, or all technical features and beneficial effects of the above-mentioned battery package, and are not repeated here.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The battery box and the battery pack provided by the embodiment of the application are described in detail, and specific examples are applied to explain the principle and the implementation of the application, and the description of the above embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A battery box having a first direction (x), a second direction (y) and a third direction (z) intersecting two by two, the battery box comprising:

a first beam (100) extending in the first direction (x);

a second beam (200) extending in the second direction (y); and

a plurality of connection assemblies (300), the connection assemblies (300) comprising a sleeve (310) and a connector (320);

the first beam (100) is intersected with the second beam (200), the first beam (100) is arranged in the second beam (200) in a penetrating mode, at least part of the sleeve (310) penetrates through the second beam (200) along the third direction (z), and the connecting piece (320) is arranged in the sleeve (310) in a penetrating mode and is used for connecting the first beam (100) with the second beam (200).

2. The battery box according to claim 1, characterized in that the second beam (200) is internally provided with a plurality of reinforcing ribs (210) arranged along the third direction (z), the sleeve (310) penetrating all the reinforcing ribs (210) along the third direction (z).

3. The battery case according to claim 2, wherein the sleeve (310) has a diameter-changing portion (311) at a position where the sleeve (310) contacts the reinforcing rib (210), the diameter-changing portion (311) having a maximum radial dimension in a radial direction of the sleeve (310) so that the diameter-changing portion (311) abuts the reinforcing rib (210).

4. The battery box according to claim 1, wherein the second beam (200) is provided with a connection through hole (220) penetrating along the third direction (z), and the sleeve (310) is penetrated in the connection through hole (220) along the third direction (z);

wherein the diameter of the connecting through hole (220) has a minimum value d ₁ mm, the diameter of the sleeve (310) has a minimum value d ₂ mm, the battery box satisfies: d is 0 < d ₂ -d ₁ ≤1。

5. The battery box according to claim 2, wherein the second beam (200) is further provided with a recess (230) extending in the third direction (z), the recess (230) being arranged opposite the sleeve (310) in the third direction (z), the first beam (100) passing through the recess (230) to pass through the second beam (200) or the second beam (200) passing through the recess (230) to pass through the first beam (100).

6. The battery box according to claim 5, wherein the recess (230) has a bottom surface (231), and the plurality of ribs (210) includes a bottom rib (211) connected to the bottom surface (231);

wherein the sleeve (310) has a first face (312) adjacent to the recess (230), the bottom rib (211) has a second face (2111) remote from the recess (230), and the first face (312) is connected to the second face (2111).

7. The battery compartment of claim 1, wherein the number of connection assemblies (300) is plural, the battery compartment further comprising:

-a front beam (400) extending along said first direction (x), said front beam (400) being connected to said second beam (200) by means of at least one of said connection assemblies (300);

-a rear beam (500) extending in the first direction (x), the rear beam (500) being connected to the second beam (200) by at least one of the connection assemblies (300);

the first beam (100) is disposed between the front beam (400) and the rear beam (500).

8. The battery box of claim 7, further comprising:

and a side beam (600) extending in the second direction (y), wherein the side beam (600) is welded with the first beam (100), the side beam (600) is welded with the front beam (400), and the side beam (600) is welded with the rear beam (500).

9. The battery compartment of claim 1, wherein the sleeve (310) has a hardness greater than the hardness of the second beam (200).

10. A battery pack comprising the battery case according to any one of claims 1 to 9 for accommodating a battery.