CN216597867U

CN216597867U - Battery box device and vehicle

Info

Publication number: CN216597867U
Application number: CN202122753162.0U
Authority: CN
Inventors: 刘志坤; 梁欢
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-05-24
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses a battery box device and a vehicle, the battery box device comprises a box body, a battery module and a protection plate, wherein the box body is provided with an accommodating space, the battery module is accommodated in the accommodating space, one side of the battery module, which is far away from the bottom wall of the box body, is provided with a first exhaust hole, the protection plate is flatly attached to one side of the battery module, which is far away from the bottom wall of the box body, a second exhaust hole is formed corresponding to the first exhaust hole, an exhaust buffer space is formed between the protection plate and the top wall of the box body, when a certain battery module in the battery box device is out of control due to heat, the generated high-temperature gas can pass through the first exhaust hole and the second exhaust hole in sequence to enter the first exhaust buffer space and cannot spread in the space between the protection plate and the bottom wall of the box body, therefore, damage to other battery modules can be avoided, and the purposes of improving the safety and prolonging the service life of the battery box device are achieved.

Description

Battery box device and vehicle

Technical Field

The utility model belongs to the technical field of power batteries, and particularly relates to a battery module and a vehicle.

Background

At present, the energy density in the battery system is bigger and bigger, and when certain battery module in the battery system takes place the thermal runaway, can produce a large amount of high-temperature gas, and high-temperature gas's exhaust is undirectional and irregular, very easily draws to generate heat and spreads, aggravates battery system's thermal runaway. In order to discharge the high-temperature gases in a directional manner, a conventional battery system is usually provided with a pressure release valve, but the pressure release valve needs to reach a certain opening pressure to be opened, when a certain battery module in the battery system is out of control due to thermal runaway and the internal pressure of the certain battery module does not reach the pressure of the pressure release valve, the high-temperature gases spread inside the battery system and contact other battery modules, so that secondary damage is generated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery box device and a vehicle, aiming at solving the technical problem that secondary harm is easily caused by the fact that high-temperature gas generated by a certain battery module in a battery system due to thermal runaway spreads in the battery system and contacts other battery modules.

In order to achieve the purpose, the utility model provides a battery box device which comprises a box body, a battery module and a protection plate, wherein the box body is provided with an accommodating space, the battery module is arranged in the accommodating space, a first exhaust hole is formed in one side, away from the bottom wall of the box body, of the battery module, the protection plate is flatly attached to one side, away from the bottom wall of the box body, of the battery module, a second exhaust hole is formed in the protection plate corresponding to the first exhaust hole, and a first exhaust buffer space is formed between the protection plate and the top wall of the box body.

In the embodiment of the utility model, the protection plate is also provided with a sealing part for sealing the second exhaust hole, and the second exhaust hole is used for being conducted under the impact of heat conducted from the first exhaust hole on the sealing part.

In the embodiment of the present invention, the peripheral side of the seal portion is connected to the side wall of the second vent hole by a tear line.

In the embodiment of the utility model, the protection plate comprises a flat plate part and a folded part which is bent and extended from the end part of the flat plate part towards the bottom wall of the box body, the flat plate part is tiled and attached to one side of the battery module, which is far away from the bottom wall of the box body, and the flat plate part is provided with the second exhaust hole.

In the embodiment of the utility model, the first side wall of the box body and the folded edge part are arranged at intervals relatively to form a second exhaust buffer space communicated with the first exhaust buffer space, and the battery box device further comprises a pressure release valve arranged on the first side wall.

In an embodiment of the utility model, the number of the folded portions is two, the two folded portions are arranged at two opposite ends of the flat plate portion, one folded portion is arranged opposite to the first side wall at a distance to form a second exhaust buffer space, the other folded portion is arranged opposite to the second side wall of the box body at a distance to form a third exhaust buffer space communicated with the first exhaust buffer space, the number of the pressure relief valves is at least two, one of the at least two pressure relief valves is arranged on the first side wall, and the other of the at least two pressure relief valves is arranged on the second side wall.

In the embodiment of the utility model, the number of the battery modules is multiple, the battery modules are sequentially arranged in parallel in at least one row in the accommodating space, each battery module comprises a first battery shell which is attached to the protection plate and is provided with a first exhaust hole, and an output pole end which is positioned at the end part of the first battery shell, and the upper side of the output pole end is lower than the top surface of the first battery shell.

In the embodiment of the utility model, the box body is internally provided with the partition plate to divide the accommodating space into at least two sub-unit spaces, and each sub-unit space is used for accommodating at least two battery modules which are arranged in parallel.

In the embodiment of the utility model, the protection plate is an aerogel part.

In order to achieve the above object, the present invention further provides a vehicle, wherein the vehicle comprises the battery box device according to the above.

Through the technical scheme, the battery box device provided by the embodiment of the utility model has the following beneficial effects:

the battery box device comprises a box body, battery module and guard plate, the box is formed with accommodating space, the battery module is arranged in accommodating space, one side that the battery module deviates from the diapire of box is formed with first exhaust hole, the guard plate tiling fits in the one side that the battery module deviates from the diapire of box, and it is formed with the second exhaust hole to correspond first exhaust hole, be formed with first exhaust buffer space between the roof of guard plate and box, when certain battery module in the battery box device takes place the thermal runaway promptly, the high temperature gas of production can loop through in first exhaust hole and the first exhaust buffer space of second exhaust hole entering, can not stretch in the space between the diapire of guard plate and box, thereby can avoid causing the harm to other battery modules, in order to reach the purpose that improves the security and the life of battery box device.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide an understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

fig. 1 is a schematic disassembled structure view of a battery box device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a shielding plate installed in a tank according to an embodiment of the present invention;

fig. 3 is a partial structural schematic view of a battery case device according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a guard plate according to an embodiment of the present invention;

fig. 5 is an enlarged schematic view of a structure at a in fig. 4.

Description of the reference numerals

1 case 11 accommodating space

12 upper cover and 13 lower box

14 first side wall 15 second side wall

2 first vent of battery module 21

22 output terminal 23 first battery housing

3 flat plate part of protection plate 31

32 hem 33 second vent hole

34 tear line for seal 35

41 first exhaust buffer space 42 second exhaust buffer space

43 third buffer space 5 pressure relief valve

6 division board

Detailed Description

The following detailed description of specific embodiments of the utility model refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the utility model and are not restrictive thereof.

The battery case device according to the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, in the present invention, there is provided a battery case apparatus, wherein the battery case apparatus includes:

a box body 1, wherein the box body 1 is provided with an accommodating space 11;

the battery module 2 is arranged in the accommodating space 11, and a first exhaust hole 21 is formed in one side, away from the bottom wall of the box body 1, of the battery module 2; and

protection plate 3, protection plate 3 tiling are laminated in the one side that battery module 2 deviates from the diapire of box 1 to correspond first exhaust hole 21 and be formed with second exhaust hole 33, be formed with first exhaust buffer space 41 between the roof of protection plate 3 and box 1.

When the battery box device is used, if a certain battery module 2 in the battery box device is out of control due to heat, the generated high-temperature gas can sequentially pass through the first vent hole 21 and the second vent hole 33 to enter the first vent buffer space 41 and cannot stretch in the space between the protection plate 3 and the bottom wall of the box body 1, so that damage to other battery modules 2 can be avoided, and the purposes of improving the safety and prolonging the service life of the battery box device are achieved.

Referring to fig. 1 and 4, in the embodiment of the present invention, the protection plate 3 is further provided with a sealing portion 34 for sealing the second exhaust hole 33, and the second exhaust hole 33 is configured to be conducted when the sealing portion 34 is impacted by heat conducted from the first exhaust hole 21. Specifically, the number of the battery modules 2 accommodated in the accommodating space 11 may be plural, the first vent holes 21 are formed on the outer case of each of the plural battery modules 2, the second vent holes 33 are formed on the protection plate 3 corresponding to the first vent holes 21 of the plural battery modules 2, and each of the second vent holes 33 of the protection plate 3 is provided with a sealing portion 34, that is, when a thermal runaway occurs in a certain battery module 2 of the battery box device, the high temperature gas generated inside the battery module 2 may be discharged from the corresponding first vent hole 21 to the corresponding sealing portion 34, the corresponding sealing portion 34 may be partially or completely separated from the protection plate 3 under the impact of the high temperature gas, so as to conduct the second vent holes 33 and allow the high temperature gas to enter the first vent buffer space 41 from the second vent holes 33, and after the high temperature gas enters the first vent buffer space 41, because the space becomes larger and the pressure becomes smaller, the high-temperature gas entering the first exhaust buffer space 41 cannot reversely burst the corresponding sealing parts 34 of the other battery modules 2 which do not generate thermal runaway, so that the high-temperature gas cannot reversely flow back to the other battery modules 2, and the safety of the other battery modules 2 which do not generate thermal runaway in the battery box device can be protected.

As shown in fig. 4 and 5, in the embodiment of the present invention, the peripheral side of the seal portion 34 is connected to the side wall of the second vent hole 33 by the tear line 35. When battery module 2 takes place thermal runaway promptly, high temperature gas can break tear line 35 to make sealing 34 can break away from with guard plate 3, and set up tear line 35 and can enclose and close formation sealing 34 on guard plate 3, thereby make guard plate 3 and sealing 34 can be the integrated into one piece design, thereby be convenient for improve machining efficiency. Specifically, the tear line 35 may be formed by forming an annular groove on the protection plate 3 to enclose the sealing portion 34, where the thickness of the protection plate 3 at the position of the annular groove is significantly smaller than the thickness of the protection plate 3 at other positions, so that the sealing portion 34 may be separated from the protection plate 3 along the annular groove to form the second vent hole 33 when being impacted by heat conducted from the first vent hole 21; a plurality of strip-shaped grooves can be formed in the protection plate 3, the strip-shaped grooves are annularly arranged at intervals to form a sealing part 34 in a surrounding mode, the thickness of the protection plate 3 at the position of each strip-shaped groove is obviously smaller than the thickness of the protection plates 3 at other positions, and therefore when the sealing part 34 is impacted by heat conducted out from the first vent holes 21, the sealing part can be separated from the protection plates 3 along the arrangement direction of the strip-shaped grooves to form second vent holes 33; in addition, the protection plate 3 and the sealing part 34 may be separately provided, that is, the sealing part 34 is directly inserted into the second air vent 33.

Referring to fig. 1, 2 and 4, in the embodiment of the present invention, the protection plate 3 includes a flat plate portion 31 and a folded edge portion 32 that is bent and extended from an end of the flat plate portion 31 toward the bottom wall of the case 1, and the flat plate portion 31 is flatly laid and attached to a side of the battery module 2 away from the bottom wall of the case 1, and is provided with a second vent hole 33. That is, the hem portion 32 may be attached to the side of the battery module 2 placed in the accommodating space 11 and at the end position, so that the protection of the battery module 2 may be further enhanced.

In the embodiment of the present invention, the first side wall 14 of the box body 1 is spaced opposite to the folded edge portion 32 to form the second exhaust buffer space 42 communicated with the first exhaust buffer space 41, and the battery box device further includes the relief valve 5, and the relief valve 5 is provided on the first side wall 14. That is, the first exhaust buffer space 41 may be located on the upper side of the battery module 2, and the second exhaust buffer space 42 may be located on the front side of the battery module 2, after the high-temperature gas enters the first exhaust buffer space 41 from the first exhaust hole 21, the high-temperature gas may flow to the second exhaust buffer space 42, and after the pressure accumulated in the first exhaust buffer space 41 and the second exhaust buffer space 42 reaches the opening pressure of the relief valve 5, the relief valve 5 may be opened, thereby the high-temperature gas is discharged out of the battery box device, the buffer space of the high-temperature gas may be increased by setting the second exhaust buffer space 42, and the safety of the whole battery box device may be ensured by setting the relief valve 5.

In the embodiment of the present invention, the number of the folded portions 32 is two, two folded portions 32 are partially disposed at opposite ends of the flat plate portion 31, one of the folded portions 32 is spaced apart from the first sidewall 14 to form a second exhaust buffer space 42, the other folded portion 32 is spaced apart from the second sidewall 15 of the box body 1 to form a third exhaust buffer space 43 communicating with the first exhaust buffer space 41, the number of the relief valves 5 is at least two, one of the at least two relief valves 5 is disposed on the first sidewall 14, and the other of the at least two relief valves 5 is disposed on the second sidewall 15. That is, the whole protection plate 3 is in a U-shape, and the two bent portions 32 of the protection plate 3 are respectively arranged at a relative interval with the first side wall 14 and the second side wall 15 of the box body 1 to form a second exhaust buffer space 42 and a third exhaust buffer space 43, so that the first exhaust buffer space 41, the second exhaust buffer space 42 and the third buffer space 43 are communicated to form a U-shaped buffer space, and the buffer space of high-temperature gas can be further increased. In addition, the relief valve 5 is provided on both the first side wall 14 and the second side wall 15 of the case 1, and the discharge efficiency of the high-temperature gas can be improved. Specifically, the number of the pressure relief valves 5 is four, two of the pressure relief valves 5 are provided on the first side wall 14 at intervals, and the other two pressure relief valves 5 are provided on the second side wall at intervals.

Referring to fig. 1 and 3, in the embodiment of the utility model, the number of the battery modules 2 is multiple, the multiple battery modules 2 are sequentially arranged in parallel in at least one row in the accommodating space 11, each of the multiple battery modules 2 includes a first battery case 23 attached to the protection plate 3 and formed with a first vent hole 21, and an output terminal 22 located at an end of the first battery case 23, an upper side of the output terminal 22 is lower than a top surface of the first battery case 23, the battery box device further includes a connection bar assembly disposed between the output terminal 22 of the multiple battery modules 2 and the protection plate 3, and the connection bar assembly is configured to be disposed at an upper side of the output terminal 22 of the multiple battery modules 2 to connect the multiple battery modules 2 in series. Because the upside with the output extreme 22 of battery module 2 sets up to be less than the top surface of first battery case 23, and the top surface of first battery case 23 promptly with the plane that the laminating of guard plate 3 set up, then behind the output extreme 22 with the bank subassembly of being connected at battery module 2, can be so that the bank subassembly can not be higher than the top surface of first battery case 23 to can guarantee that guard plate 3 and first battery case 23 closely laminate, in order further to prevent that high temperature from spreading gas and going on under guard plate 3. The plurality of battery modules 2 may be arranged in parallel in two rows in the housing space 11.

In the embodiment of the present invention, a partition plate 6 is disposed in the box body 1 to divide the accommodating space 11 into at least two sub-unit spaces, each sub-unit space is used for accommodating at least two battery modules 2 arranged in parallel, and the upper side of the partition plate 6 is lower than or flush with the upper side of the output pole end 22. Can equally divide into at least two sets ofly with a plurality of battery module 2 promptly, at least two sets of battery module 2 one-to-one sets up in two at least subunit spaces, thereby can further avoid battery module 2 in the subunit space to influence battery module 2 in another subunit space when taking place thermal runaway, can also form fixedly to battery module 2 in every subunit space through division board 6 simultaneously, and the upside of division board 6 is less than or the parallel and level in the upside of output extreme 22, can be convenient for connect row's subassembly to span division board 6 and establish ties adjacent two battery module 2. Specifically, the partition plate 6 is in the shape of a cross, that is, the partition plate 6 may partition the housing space 11 into four sub-unit spaces.

In the embodiment of the present invention, the protection plate 3 may be an aerogel workpiece, that is, the protection plate 3 is made of aerogel, and the aerogel has high elasticity and strong adsorption performance, so that the protection plate 3 can be tightly attached to the first battery housing 23 of the battery module 2. Of course, the present invention is not limited thereto, and the protection plate 3 may also be made of other high temperature resistant and heat insulating non-metal composite materials, such as a cloud film, silica gel, etc.

Referring to fig. 1 and 2 again, in the embodiment of the present invention, the box body 1 includes a lower box 13 having an accommodating space 11 and an upper cover 12 for covering the lower box 13, the lower box 13 forms a bottom wall of the box body 1 toward a side of the upper cover 12, the side of the upper cover 12 facing the lower box 13 forms a top wall of the box body 1, and the side of the upper cover 12 facing the lower box 13 is spaced from the shielding plate 3 to form a first exhaust buffer space 41.

Furthermore, the utility model also provides a vehicle, wherein the vehicle comprises the battery box device. Since the vehicle adopts all the technical solutions of the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

In the description of the present invention, it is to be understood that 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 or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A battery case apparatus, characterized in that the battery case apparatus comprises:

the refrigerator comprises a box body (1), wherein a containing space (11) is formed in the box body (1);

the battery module (2) is arranged in the accommodating space (11), and a first exhaust hole (21) is formed in one side, away from the bottom wall of the box body (1), of the battery module (2); and

protection plate (3), protection plate (3) tiling laminate in battery module (2) deviate from one side of the diapire of box (1), and correspond first exhaust hole (21) are formed with second exhaust hole (33), protection plate (3) with be formed with first exhaust buffer space (41) between the roof of box (1).

2. The battery box device according to claim 1, wherein a sealing portion (34) for sealing the second vent hole (33) is further provided on the shielding plate (3), and the second vent hole (33) is adapted to be conducted when the sealing portion (34) is struck by heat conducted from the first vent hole (21).

3. The battery box device according to claim 2, wherein the peripheral side of the seal portion (34) is connected to the side wall of the second vent hole (33) by a tear line (35).

4. The battery box device according to claim 1, wherein the protection plate (3) comprises a flat plate portion (31) and a folded portion (32) which is folded and extended from an end of the flat plate portion (31) toward the bottom wall of the box body (1), the flat plate portion (31) is flatly laid and attached to one side of the battery module (2) away from the bottom wall of the box body (1), and the second vent hole (33) is formed in the flat plate portion.

5. The battery box device according to claim 4, wherein the first side wall (14) of the box body (1) is spaced apart from the flange portion (32) to form a second exhaust buffer space (42) communicating with the first exhaust buffer space (41), and the battery box device further comprises a pressure release valve (5), and the pressure release valve (5) is provided on the first side wall (14).

6. The battery box device according to claim 5, wherein the number of the folded edge portions (32) is two, two of the folded edge portions (32) are provided at opposite ends of the flat plate portion (31), one of the folded parts (32) is arranged opposite to the first side wall (14) at a certain interval to form the second exhaust buffer space (42), the other folded part (32) is arranged opposite to the second side wall (15) of the box body (1) at a certain interval to form a third exhaust buffer space (43) communicated with the first exhaust buffer space (41), the number of the pressure relief valves (5) is at least two, one of the at least two pressure relief valves (5) is arranged on the first side wall (14), and the other of the at least two pressure relief valves (5) is arranged on the second side wall (15).

7. The battery box device according to any one of claims 1 to 6, wherein the number of the battery modules (2) is plural, the plural battery modules (2) are arranged in parallel in at least one row in the accommodating space (11), each of the plural battery modules (2) includes a first battery case (23) attached to the protection plate (3) and formed with the first vent hole (21), and an output terminal (22) located at an end of the first battery case (23), and an upper side of the output terminal (22) is lower than a top surface of the first battery case (23).

8. The battery box device according to claim 7, wherein a partition plate (6) is arranged in the box body (1) to partition the accommodating space (11) into at least two sub-unit spaces, and each sub-unit space is used for accommodating at least two battery modules (2) arranged in parallel.

9. The battery box assembly according to any one of claims 1 to 6, wherein the shielding plate (3) is an aerogel member.

10. A vehicle characterized in that the vehicle includes the battery box apparatus according to any one of claims 1 to 9.