CN220553550U - Battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery device, which comprises: the battery box body, the supporting piece, the battery and the isolating piece, wherein the battery box body is formed with an accommodating space; the support piece is positioned in the accommodating space and is provided with an exhaust passage; the battery is arranged on the supporting piece; the battery is positioned in the battery placing space, and the exhaust port of the exhaust channel is communicated with the gas storage space; in the direction of the battery placing space facing the gas storage space, the exhaust port of the exhaust channel is arranged beyond the isolating piece or is arranged flush with the side surface of the isolating piece facing the gas storage space. The battery device can realize rapid exhaust when the battery is out of control.

Description

Battery device

Technical Field

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

Background

In the related art, the battery device comprises a battery and a supporting piece for limiting the battery, an exhaust channel is formed in the supporting piece, an exhaust port of the exhaust channel is communicated with a battery box body, and when the battery is in thermal runaway, high-pressure and high-temperature gas released by the battery can enter the exhaust channel and be discharged out of the battery box body.

However, the potting adhesive for bonding the battery in the battery case easily blocks the exhaust port of the exhaust passage, thereby causing the high-pressure gas to be not normally discharged.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The utility model provides a battery device which can solve the technical problem that an exhaust channel cannot exhaust normally.

The battery device includes:

the battery box body is provided with an accommodating space;

a support member located in the accommodation space, the support member being formed with an exhaust passage;

a battery disposed on the support;

the isolating piece is positioned on one side of the supporting piece facing the battery, the accommodating space comprises a battery placing space and a gas storage space which are formed by the isolating piece in a separated mode, the battery is positioned in the battery placing space, and the gas outlet of the gas exhaust channel is communicated with the gas storage space;

and the exhaust port of the exhaust channel is arranged beyond the isolating piece or is flush with the side surface of the isolating piece facing the gas storage space in the direction of the battery placing space facing the gas storage space.

On one hand, the battery box body is divided into the battery placing space and the gas storage space through the isolating piece, the battery is integrated in the battery placing space, the gas outlet of the gas exhaust channel is communicated with the gas storage space, and pouring sealant for bonding the battery cannot enter the gas storage space, so that the technical problem that the pouring sealant easily seals the gas outlet of the gas exhaust channel can be solved; on the other hand, in the direction facing the gas storage space, the exhaust port of the exhaust channel exceeds the isolating piece or is flush with the side surface of the isolating piece facing the gas storage space, and the exhaust port of the exhaust channel can be directly connected to the inside of the gas storage space.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The 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. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views.

Wherein:

fig. 1 is a schematic view of the structure of an exemplary embodiment of a battery device of the present disclosure;

FIG. 2 is a top view of an exemplary embodiment of a battery device of the present disclosure;

fig. 3 is a cross-sectional view of the battery device of fig. 2 along the broken line AA;

FIG. 4 is a schematic view of the structure of a support in an exemplary embodiment of a battery device of the present disclosure;

fig. 5 is a schematic view of the structure of a first plate and a separator bar in an exemplary embodiment of a battery device of the present disclosure.

Reference numerals illustrate:

1. a battery case; 11. a bottom plate; 12. a frame; 2. a support; 21. a first plate; 211. a notch; 22. a second plate; 23. a separator bar; 3. an exhaust passage; 4. a battery; 41. a pressure relief structure; 4x, battery rows; 5. a spacer; 61. a battery placement space; 62. a gas storage space; 63. an electric appliance integration space; 7. a blocking portion; 8. a groove; 9. a through hole; x, a first direction; y, second direction.

Detailed Description

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, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being "on," "under," or "in" or "out" of another element or feature being "on," "under" or "in" or "out" of the other element or elements, it can be directly connected to the other element or elements, or indirectly connected to the other element or elements via intervening elements.

The present exemplary embodiment first provides a battery device, as shown in fig. 1-5, fig. 1 is a schematic structural view of an exemplary embodiment of the battery device of the present disclosure, fig. 2 is a top view of an exemplary embodiment of the battery device of the present disclosure, fig. 3 is a partial sectional view of the battery device of fig. 2 along a broken line AA, fig. 4 is a schematic structural view of a support member of an exemplary embodiment of the battery device of the present disclosure, and fig. 5 is a schematic structural view of a first plate and a separator bar of an exemplary embodiment of the battery device of the present disclosure.

The battery device includes: the battery box 1, the support piece 2, the battery 4 and the spacer 5, wherein the battery box 1 is provided with an accommodating space; the support 2 is positioned in the accommodating space, and the support 2 is formed with an exhaust passage 3; the battery 4 is arranged on the support 2; the separator 5 is positioned on one side of the support 2 facing the battery 4, the accommodating space comprises a battery placing space 61 and a gas storage space 62 which are formed by the separation of the separator 5, the battery 4 is positioned in the battery placing space 61, and the gas outlet of the gas outlet channel 3 is communicated with the gas storage space 62; wherein in the direction in which the battery placement space 61 faces the gas storage space 62, the gas outlet of the gas discharge passage 3 is provided beyond the separator 5 or is provided flush with the side of the separator 5 facing the gas storage space 62.

On the one hand, in the present exemplary embodiment, the battery case 1 is partitioned into the battery placement space 61 and the gas storage space 62 by the partition 5, the battery 4 is integrated in the battery placement space 61, the gas outlet of the gas exhaust channel 3 communicates with the gas storage space 62, and the potting adhesive for bonding the battery 4 cannot enter the gas storage space 62, so that the arrangement can solve the technical problem that the potting adhesive easily blocks the gas outlet of the gas exhaust channel 3; on the other hand, in the direction facing the gas storage space 62, the exhaust port of the exhaust passage 3 is provided beyond the separator 5 or flush with the side of the separator 5 facing the gas storage space 62, and the exhaust port of the exhaust passage 3 can be directly connected to the inside of the gas storage space 62, which can reduce the risk of high-pressure gas in the exhaust passage 3 entering the battery placement space 61.

In the present exemplary embodiment, as shown in fig. 1 to 5, a battery case 1 may include: a bottom plate 11 and a frame 12, wherein the frame 12 is connected to the bottom plate 11, and the bottom plate 11 and the frame 12 form an accommodating space; a gas storage space 62 is formed between the separator 5 and a part of the frame 12, and a battery placement space 61 is formed between the separator 5 and a part of the frame 12. That is, the spacer 5 separates at least part of the accommodating space of the battery case along the direction parallel to the bottom plate 11 to form the battery placing space 61 and the gas storage space 62, and the spacer 5 can block the pouring sealant in the battery placing space 61 from entering the gas storage space 62, and can block the high-pressure gas in the gas storage space 62 from entering the battery placing space 61.

The bottom plate 11 of the battery case 1 is a side plate for supporting the battery when the battery device is used normally.

In the present exemplary embodiment, as shown in fig. 1 to 5, the support member 2 may be supported on the base plate 11, and the battery 4 may be supported on the support member 2. The present exemplary embodiment sets the support 2 at the bottom of the battery 4, and the high-pressure and high-temperature gas released when the battery is thermally out of control can be discharged to the outside of the battery case through the exhaust passage 3 located in the support 2, since the bottom of the battery case 1 is generally set away from one side of the passenger compartment, this setting can reduce the risk of damage to people and objects in the passenger compartment caused by the high-pressure and high-temperature gas.

In the present exemplary embodiment, as shown in fig. 1 to 5, the spacer 5 may be provided at a side of the support 2 facing away from the bottom plate 11. Since the supporting member 2 needs to protrude or be disposed flush with the spacer 5, if the spacer 5 and the battery case are assembled together in advance, the supporting member 2 needs to pass through the bottom of the spacer 5 when the subsequent supporting member 2 is installed, and thus the operation is relatively difficult, and thus, the battery device needs to assemble the supporting member 2 in the battery case and then assemble the spacer 5.

In addition, in the related art, the separator 5 and the battery case are connected in a non-detachable manner, such as welding, bonding, etc., the heat generated during welding easily causes deformation of the battery case, and the bonding manner has poor connection reliability. In the present exemplary embodiment, the spacer 5 and the battery case are detachably connected, and this arrangement can facilitate assembly and post-maintenance of the battery device. For example, the separator 5 and the battery case may be connected by bolts, snap-fit connections, magnetic connections, latch connections, or the like.

In the present exemplary embodiment, as shown in fig. 1 to 5, the spacer 5 is a casting, and the spacer 5 may be bolted to the battery case 1. The cast spacer 5 can be locked with the battery case 1 by a common bolt. It should be understood that in other exemplary embodiments, the spacer 5 may also be a profile, and the spacer 5 of the profile may be locked with the battery case 1 by a high-pressure nut.

In the present exemplary embodiment, as shown in fig. 1 to 5, the support 2 may include: the first plate 21, the second plate 22 and a plurality of separation strips 23, wherein the second plate 22 is opposite to the first plate 21 and is arranged at intervals, and the battery 4 and the separator 5 are positioned on one side of the first plate 21 away from the second plate 22; a plurality of dividing strips 23 are located between the first plate 21 and the second plate 22 for dividing the space between the first plate 21 and the second plate 22 into the exhaust passages 3.

In the present exemplary embodiment, as shown in fig. 1 to 5, the accommodating space may further include an electric instrument integrating space 63, the electric instrument integrating space 63 being located at a side of the battery placing space 61 away from the air storage space 62, the electric instrument integrating space 63 being for accommodating an electric device; the exhaust passage 3 includes an opening facing the electric instrument integration space 63, and the battery device further includes: and a blocking part 7, wherein the blocking part 7 is positioned at one side of the support 2 away from the gas storage space 62, and the blocking part 7 is used for blocking an opening of the exhaust channel 3 facing the electric appliance integration space 63. The present exemplary embodiment blocks one end of the exhaust passage 3 near the electric instrument integration space 63 by the blocking part 7, so that it is possible to prevent the high-pressure gas discharged from the exhaust passage 3 from damaging the electric instrument located in the electric instrument integration space 63. The electrical device may be a high voltage distribution box, a battery management system, or the like.

In this exemplary embodiment, as shown in fig. 1 to 5, the blocking portion 7 may be directly integrated on the support 2, and the blocking portion 7, the first plate 21, the second plate 22, and the plurality of dividing strips 23 may be integrally formed. It should be understood that in other exemplary embodiments, the blocking portion 7 may be disposed outside the support member 2, and the blocking portion 7 may abut against an end of the exhaust passage 3 near the electric instrument integration space 63.

In the present exemplary embodiment, as shown in fig. 1 to 5, the battery device further includes: and a fireproof layer, which may be located on at least part of the inner wall of the gas storage space 62. The fire-blocking layer can reduce the thermal conductivity of the gas storage space 62 to other areas, thereby avoiding the damage of other structures by the high-temperature gas in the gas storage space 62. The inner wall of the gas storage space 62 may include: the side of the separator 5 facing the gas storage space 62 and the side of the frame 12 facing the gas storage space 62. The fireproof layer can be positioned on at least part of the inner side surface of the frame 12 facing the gas storage space 62, and can reduce the heat conductivity of the gas storage space 62 to the outside of the battery box body, so that the risk that the high-temperature gas in the gas storage space 62 damages the external structure of the battery box body can be reduced; the fireproof layer may also be located on at least part of the inner side surface of the separator 5 facing the gas storage space 62, and may reduce the thermal conductivity of the gas storage space 62 to the battery placement space 61, so that the risk of damaging the battery 4 in the battery placement space 61 by high-temperature gas in the gas storage space 62 may be reduced. The fire resistant layer may be mica board or mica paper.

In this exemplary embodiment, as shown in fig. 1 to 5, the battery 4 may include a pressure relief structure 41, and the side surface of the battery 4 provided with the pressure relief structure 41 is disposed facing the support 2, and the front projection of the pressure relief structure 41 on the projection surface and the front projection of the exhaust passage 3 on the projection surface are at least partially overlapped, and the projection surface is perpendicular to the distribution direction of the battery 4 and the support 2. When the battery 4 is thermally out of control, the battery 4 releases high-pressure gas to the outside through the pressure release structure 41, and the high-pressure gas can enter the exhaust passage 3, thereby being discharged to the outside of the battery case through the exhaust passage 3.

In the present exemplary embodiment, as shown in fig. 1 to 5, the battery placement space 61 and the gas storage space 62 may be distributed along the first direction X. The support 2 may be formed with a plurality of exhaust passages 3, and the plurality of exhaust passages 3 may extend in the first direction X and be spaced apart in the second direction Y, which may be perpendicular to the first direction X. The plurality of cells 4 form a plurality of rows of cells 4X distributed along the second direction Y, the cells 4X including a plurality of cells 4 distributed along the first direction X; the exhaust channels 3 may be arranged in correspondence with one or more rows of battery rows 4x, the orthographic projection of the pressure release structures 41 of the batteries in the battery rows 4x being located on the orthographic projection of the corresponding exhaust channels 3 on the projection plane, which is perpendicular to the distribution direction of the support 2 and the batteries 4.

In the present exemplary embodiment, the pressure relief structure 41 may be formed by a score on the battery case. The score may be located on the outside of the battery case. The score may be a closed pattern, e.g., the score may be a circle, rectangle, triangle, irregular pattern, etc. The score may also be in a non-closed pattern, for example, the score may be in a "cross," T, "X," etc. The pressure release structure 41 can also be a thinning area formed by stamping, the pressure release structure can also be a thinning area of the battery shell, and the pressure release structure 41 can also be a patch attached to the explosion-proof opening.

It should be noted that, when the pressure relief structure 41 is a solid structure such as a patch and a thinning area, the orthographic projection of the patch and the thinning area on the projection plane is the orthographic projection of the pressure relief structure on the projection plane; when the pressure relief structure 41 is formed by the notch with the closed shape, the orthographic projection of the area surrounded by the notch with the closed shape on the projection plane is the orthographic projection of the pressure relief structure on the projection plane; when the pressure relief structure 41 is formed by the non-closed shape score, the smallest circumcircle of the orthographic projection of the non-closed shape score on the projection plane is the orthographic projection of the pressure relief structure on the projection plane.

In the present exemplary embodiment, as shown in fig. 1 to 5, the spacer 5 is formed with a cavity structure. The spacer 5 of the cavity structure can effectively block the heat in the air storage space 62 from entering the battery placement space 61 due to the large thermal resistance of the air.

In the present exemplary embodiment, as shown in fig. 1 to 5, the end of the first plate 21 near the gas storage space 62 is formed with a notch 211 recessed away from the separator 5 on the side facing the separator 5, and the separator 5 abuts in the notch 211. The notch 211 may allow one end of the first plate 21 near the gas storage space 62 to form a stepped structure at a side facing the separator 5, which may limit the separator 5 in the first direction X, thereby improving the stability of the overall structure of the battery device.

In this exemplary embodiment, as shown in fig. 1 to 5, a plurality of grooves 8 are further formed on the side of the first plate 21 facing away from the second plate 22, the grooves 8 may be disposed in one-to-one correspondence with the batteries 4, and the batteries 4 may be disposed in the corresponding grooves 8. In one aspect, the arrangement may facilitate battery assembly; on the other hand, the grooves 8 have a certain positioning effect on the battery, so that the battery 4 can be prevented from moving in the battery case. The bottom of the groove 8 can be further provided with a through hole 9, the through hole 9 can be communicated with the exhaust channel 3, the orthographic projection of the pressure release structure 41 of the battery on the projection surface can be positioned on the orthographic projection of the through hole 9 on the projection surface, and the projection surface is perpendicular to the distribution direction of the battery 4 and the supporting piece 2. The high-pressure gas released when the battery is thermally out of control may enter the exhaust passage 3 through the through hole 9.

It should be appreciated that in other exemplary embodiments, the through holes 9 may be replaced by other weak structures, for example, the through holes 9 may be replaced by a thinner plate-like structure, and the high-pressure gas released when the battery is thermally out of control may break through the plate-like structure into the exhaust passage 3.

In the present exemplary embodiment, the battery device further includes: pouring sealant is arranged between adjacent batteries 4.

The battery includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacked portion, wherein the stacked portion comprises a first pole piece, a separator and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein the polarities of the first pole piece and the second pole piece can be interchanged. The first and second pole pieces are coated with an active substance.

In this exemplary embodiment, the battery may be a cylindrical battery, and the battery case of the cylindrical battery may include two circular end surfaces and a curved surface between the two circular end surfaces.

In other exemplary embodiments, the battery may be a prismatic battery, that is, the battery may be a quadrangular battery, where the quadrangular battery mainly refers to a prismatic shape, but it is not strictly limited whether each side of the prism is necessarily a strictly defined straight line, and corners between sides are not necessarily right angles, and may be arc transitions.

The battery can be a laminated battery, the laminated battery is convenient to group, and the battery with longer length can be obtained through processing. Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Alternatively, the battery may be a wound battery in which a first pole piece, a second pole piece opposite in electrical property to the first pole piece, and a separator sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell.

In the present exemplary embodiment, the battery device is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixed a plurality of batteries. The battery may be a cylindrical battery, and the cylindrical battery may be disposed on the support plate, thereby forming a battery module.

The battery pack comprises a plurality of batteries and a box body, wherein the box body is used for fixing the plurality of batteries.

It should be noted that the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the case. Wherein, a plurality of batteries can be installed in the box after forming the battery module. Or, a plurality of batteries can be directly arranged in the box body, namely, the plurality of batteries do not need to be grouped, and the plurality of batteries are fixed by the box body.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

The drawings in the present disclosure relate only to the structures to which the present disclosure relates, and other structures may be referred to in general. The embodiments of the present disclosure and features in the embodiments may be combined with each other to arrive at a new embodiment without conflict. It will be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the disclosed embodiments without departing from the spirit and scope of the disclosed embodiments, which are intended to be encompassed within the scope of the appended claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery device, characterized in that the battery device comprises:

a battery box body (1), wherein an accommodating space is formed in the battery box body (1);

a support (2) located in the accommodation space, the support (2) being formed with an exhaust passage (3);

a battery (4) disposed on the support (2);

a separator (5) located on a side of the support (2) facing the battery (4), wherein the accommodating space comprises a battery placing space (61) and a gas storage space (62) which are formed by the separation of the separator (5), the battery (4) is located in the battery placing space (61), and an exhaust port of the exhaust channel (3) is communicated with the gas storage space (62);

in the direction of the battery placing space (61) facing the gas storage space (62), the exhaust port of the exhaust channel (3) is arranged beyond the isolating piece (5) or is arranged flush with the side surface of the isolating piece (5) facing the gas storage space (62).

2. The battery device according to claim 1, wherein the battery case (1) includes:

a bottom plate (11);

a frame (12) connected to the base plate (11), the base plate (11) and the frame (12) forming the accommodation space;

the gas storage space (62) is formed between the isolating piece (5) and part of the frame (12), and the battery placing space (61) is formed between the isolating piece (5) and part of the frame (12).

3. Battery device according to claim 1, characterized in that the separator (5) and the battery housing (1) are detachably connected.

4. The battery device according to claim 1, characterized in that the spacer (5) is a casting, the spacer (5) being bolted to the battery housing (1).

5. The battery device according to claim 1, wherein the accommodation space further includes an electric appliance integration space (63), the electric appliance integration space (63) being located at a side of the battery placement space (61) away from the gas storage space (62), the electric appliance integration space (63) being for accommodating an electric device;

the exhaust channel (3) comprises an opening facing the appliance integration space (63), the battery device further comprising:

and the blocking part (7) is positioned on one side of the support piece (2) away from the gas storage space (62), and the blocking part (7) is used for blocking an opening of the exhaust channel (3) facing the electric appliance integration space (63).

6. The battery device according to claim 2, characterized in that the battery device further comprises:

the fire-resistant layer is located on at least partial inner wall of the gas storage space (62), and the inner wall of the gas storage space (62) comprises: the isolating piece (5) faces the side face of the gas storage space (62), and the frame (12) faces the side face of the gas storage space (62).

7. Battery device according to any of claims 1-6, characterized in that the battery (4) comprises a pressure relief structure (41), the side of the battery (4) provided with the pressure relief structure (41) being arranged facing the support (2), the front projection of the pressure relief structure (41) on a projection plane and the front projection of the exhaust channel (3) on the projection plane at least partly coincide, the projection plane being perpendicular to the direction of distribution of the battery (4) and the support (2).

8. The battery device according to any one of claims 1-6, wherein the support (2) comprises:

a first plate (21);

a second plate (22) disposed opposite to the first plate (21), the battery (4) and the separator (5) being located on a side of the first plate (21) away from the second plate (22);

a plurality of dividing strips (23) located between the first plate (21) and the second plate (22) for dividing the space between the first plate (21) and the second plate (22) into the exhaust channels (3);

one end of the first plate (21) close to the gas storage space (62) is provided with a notch (211) which is far away from the direction of the separator (5) and is recessed on the side face facing the separator (5), and the separator (5) is abutted in the notch (211).

9. The battery device according to any one of claims 1 to 6, further comprising:

and pouring sealant is arranged between adjacent batteries (4).

10. Battery device according to any of claims 1-6, characterized in that the battery (4) is a cylindrical battery.