CN218101601U

CN218101601U - Battery pack shell, battery pack and vehicle

Info

Publication number: CN218101601U
Application number: CN202222280382.0U
Authority: CN
Inventors: 徐海龙
Original assignee: Xiaomi Automobile Technology Co Ltd
Current assignee: Xiaomi Automobile Technology Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-20
Anticipated expiration: 2032-08-29

Abstract

The utility model discloses a battery pack casing, battery package and vehicle, the battery pack casing includes the shell body, be equipped with into cigarette hole on the internal face of shell body, be equipped with the smoke vent on the outer wall of shell body, the inside flue that is equipped with of lateral wall of shell body, advance the cigarette hole with the smoke vent passes through the flue intercommunication. The utility model discloses battery package subassembly, the flue gas that battery package thermal runaway produced can directly discharge to the external world through the inside flue of shell body, prevents that the thermal runaway from stretching, need not to reserve the space of discharging fume at shell body inside, has effectively heightened the inside space utilization of battery package casing to the position in hole of discharging fume does not receive the restriction of the inside components and parts of battery package, can set up explosion-proof valve in optional position from this, has improved the degree of freedom of product design.

Description

Battery pack shell, battery pack and vehicle

Technical Field

The utility model relates to a vehicle manufacturing technical field especially relates to a battery package casing, battery package and vehicle.

Background

In recent years, thanks to policy driving and industry technology upgrading, electric vehicles are increasingly popularized, and accordingly power battery safety problems are paid much attention, especially thermal runaway safety protection problems of batteries become a technical difficulty to be overcome urgently in various host factories and battery factories, and when the batteries are thermally runaway, whether smoke generated by a battery core spray valve can be smoothly discharged or not is critical to control thermal runaway spreading of the batteries.

In the related art, a plurality of explosion-proof valves are generally arranged on a battery box body, a smoke exhaust channel is arranged in a battery pack, and smoke generated by a battery core spray valve is exhausted through the explosion-proof valves of the battery pack. Enough space needs to be reserved in the box body corresponding to the battery pack explosion-proof valve area to avoid smoke exhaust blockage, so that the space utilization rate of the battery pack can be reduced, and the arrangement positions of the battery pack explosion-proof valve and other parts are also limited.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving one of the technical problems in the related art at least to a certain extent.

Therefore, the embodiment of the utility model provides a can improve space utilization's battery package casing.

The embodiment of the utility model provides a battery package with above-mentioned battery package casing is still provided.

The embodiment of the utility model provides a vehicle that has above-mentioned battery package is still provided.

The utility model discloses battery package casing includes the shell body, be equipped with into smoke hole on the internal face of shell body, be equipped with the exhaust hole on the outer wall of shell body, the inside flue that is equipped with of lateral wall of shell body, advance the smoke hole with the exhaust hole passes through the flue intercommunication.

The utility model discloses battery package subassembly, the flue gas that battery package thermal runaway produced can directly discharge to the external world through the inside flue of shell body, prevent that thermal runaway from stretching, the mountable explosion-proof valve of smoke vent department, and because smoke vent and the inside components and parts of battery package are not direct correlation, need not at the inside space of reserving of shell body, the inside space utilization of battery package casing has effectively been improved, and the position of smoke vent does not receive the restriction of the inside components and parts of battery package, can set up explosion-proof valve in the optional position from this, the degree of freedom of product design has been improved.

In some embodiments, the housing body includes a top plate, a bottom plate, and a plurality of side beams connected end to end in sequence to form a frame, the top plate is mounted on top of the frame, the bottom plate is mounted on bottom of the frame, and the flue is disposed inside at least one of the top plate, the bottom plate, and the side beams.

In some embodiments, the side beams include a first side beam, a second side beam, a third side beam and a fourth side beam, each of the first side beam, the second side beam, the third side beam and the fourth side beam has a cavity therein, and the cavities are communicated with each other to form the flue.

In some embodiments, at least one of the first side member, the second side member, the third side member and the fourth side member has the smoke inlet provided on an inner wall surface thereof;

the outer wall surface of at least one of the first side beam, the second side beam, the third side beam and the fourth side beam is provided with the smoke exhaust hole.

In some embodiments, the first side beam, the second side beam, the third side beam and the fourth side beam are all provided with a plurality of smoke inlet holes which are arranged at intervals along the length direction of the side beam;

the number of the smoke exhaust holes is one, and the smoke exhaust holes are formed in the outer wall surface of any one side beam.

In some embodiments, the cavity is further provided with a reinforcing rib, and the reinforcing rib extends along the length direction of the side beam where the reinforcing rib is arranged.

The utility model discloses the battery package of second aspect embodiment includes any of the above-mentioned embodiments battery package casing, electric core and first explosion-proof valve, the electric core is established in the battery package casing, first explosion-proof valve is installed smoke vent department.

In some embodiments, a second explosion-proof valve is arranged on the battery cell, and an end face where the second explosion-proof valve is located is arranged opposite to at least part of the smoke inlet.

In some embodiments, the end face of the second explosion-proof valve is spaced from the inner wall surface of the battery pack.

The vehicle of the third aspect embodiment of the present invention includes the battery pack of any of the above embodiments.

Drawings

Fig. 1 is a schematic diagram of a battery pack case according to an embodiment of the present invention.

Fig. 2 is an exploded view of a battery pack according to an embodiment of the present invention;

fig. 3 is a schematic diagram of the flow of the flue gas of the battery pack case according to the embodiment of the present invention.

Fig. 4 is a schematic diagram of a side beam and an electric core of a battery pack case.

Reference numerals:

1. a housing body; 101. a smoke inlet hole; 102. a smoke vent; 103. a flue; 104. a top plate; 105. a base plate; 106. a first side member; 107. a second side member; 108. a third side member; 109. a fourth side member; 110. reinforcing ribs; 2. an electric core; 201. a second explosion-proof valve; 3. a first explosion-proof valve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-4, the battery pack housing of the embodiment of the present invention includes a housing body 1, the housing body 1 is a box structure and is formed by connecting a plurality of side walls, a smoke inlet 101 is provided on the inner wall surface of the housing body 1, a smoke outlet 102 is provided on the outer wall surface of the housing body 1, and the number of the smoke inlet 101 and the number of the smoke outlet 102 can be one or more.

Inside flue 103 that is equipped with of the lateral wall of shell body 1, the quantity of flue 103 can be one or many, advances smoke hole 101 and smoke vent 102 and passes through flue 103 intercommunication, when the battery package takes place the thermal runaway, the flue gas that electricity core 2 explosion-proof valve produced passes through on the 1 internal face of shell body advances smoke hole 101 and gets into flue 103, and outwards discharge through smoke vent 102 again, the explosion-proof valve of smoke vent 102 department mountable, the thermal runaway flue gas passes through the outside that the explosion-proof valve discharged to the battery package casing.

It should be noted that the structure of the casing body 1 is not limited, and the casing body may be a cylindrical casing, a rectangular parallelepiped casing, or a casing with other structures, the definition of the side wall of the casing body 1 is not limited to the peripheral wall of the casing body, and may also be a top wall or a bottom wall, and the side wall of the casing body 1 may be a hollow structure to form the flue 103, or may be provided with a through hole inside the side wall to form the flue 103.

The utility model discloses battery package subassembly, the flue gas that battery package thermal runaway produced can directly discharge to the external world through the inside flue 103 of shell body 1, prevent that thermal runaway from stretching, exhaust hole 102 department mountable explosion-proof valve, and because exhaust hole 102 is not directly related with the inside components and parts of battery package, need not at the inside space of reserving in shell body 1, the inside space utilization of battery package casing has effectively been improved, and exhaust hole 102's position does not receive the restriction of the inside components and parts of battery package, can set up explosion-proof valve at the optional position from this, the degree of freedom of product design has been improved.

Optionally, the case body 1 is a common cuboid structure, and specifically includes a top plate 104, a bottom plate 105 and a plurality of side beams, the plurality of side beams are sequentially connected end to form a frame structure, the upper and lower ends of the frame are open, the top plate 104 is installed at the top opening of the frame, the bottom plate 105 is installed at the bottom opening of the frame, thereby forming a box structure, and the stacking structure of the battery cell 2 can be installed inside the case body 1, thereby forming a complete battery pack.

The flues 103 are provided inside at least one of the top panel 104, the bottom panel 105 and the side members, it being understood that the flues 103 may be provided inside any one of the top panel 104, the bottom panel 105 and the side members alone, or may be provided on two or three of them at the same time, and the extending direction and the number of branches of the flues 103 are designed according to the actual structure of the battery pack.

As shown in fig. 4, in some embodiments, the plurality of side beams includes a first side beam 106, a second side beam 107, a third side beam 108 and a fourth side beam 109 which are connected end to end in sequence, wherein the first side beam 106, the second side beam 107, the third side beam 108 and the fourth side beam 109 are all similar to a tubular structure, the side beams are provided with cavities inside, and the cavities in the first side beam 106, the second side beam 107, the third side beam 108 and the fourth side beam 109 are communicated with each other to form the flue 103.

It can be understood that the utility model discloses flue 103 of battery package casing is circular flue 103, around in the periphery of electric core 2, can enter the position of smoke hole 101 according to the position determination of electric core 2 explosion-proof valve, from this, when the battery package takes place the thermal runaway, in the flue gas that electric core 2 explosion-proof valve produced entered into annular flue 103 through advancing smoke hole 101 on the shell body 1 internal face, discharged through smoke hole 102 at last.

Further, at least one of the first side beam 106, the second side beam 107, the third side beam 108 and the fourth side beam 109 is provided with a smoke inlet 101 on an inner wall surface thereof, and the positions, the number and the sizes of the smoke inlet 101 can be determined according to the position of the explosion-proof valve of the electric core 2, so as to ensure that smoke generated by thermal runaway of the battery pack can rapidly enter the flue 103 and be discharged.

Similarly, the outer wall surface of at least one of the first side beam 106, the second side beam 107, the third side beam 108 and the fourth side beam 109 is provided with smoke exhaust holes 102, and the position, number and size of the smoke exhaust holes 102 can be selected according to the structure of the battery pack mounting rack.

Preferably, as shown in fig. 3, a plurality of smoke inlet holes 101 are formed in each of the first side beam 106, the second side beam 107, the third side beam 108 and the fourth side beam 109, and the smoke inlet holes 101 are arranged at intervals along the length direction of the side beam where the smoke inlet holes are formed, it can be understood that the annular flue 103 has a plurality of smoke inlet holes, when the battery pack is out of control due to heat, smoke discharged from the battery cell 2 may be filled in the casing, and the smoke inlet holes 101 can simultaneously enter smoke, so that the smoke exhaust efficiency of the battery pack is effectively improved, and the battery pack is prevented from being ignited due to the spread of the out of control due to the heat.

The number of the smoke discharge holes 102 is one, the smoke discharge hole 102 is arranged on the outer wall surface of any one side beam, smoke enters the annular flue 103 through the plurality of smoke inlet holes 101 and then is gathered together, and is discharged from the explosion-proof valve at the smoke discharge hole 102, and in the embodiment, the smoke discharge hole 102 is arranged on the outer wall surface of the first side beam 106.

In some embodiments, the cavity is further provided with a reinforcing rib 110, and the reinforcing rib 110 can effectively enhance the structural strength of the battery pack shell, increase the protection effect of the shell, and prevent the battery pack from being deformed by external force.

The number of the reinforcing ribs 110 can be one or more, the arrangement form of the reinforcing ribs 110 can be multiple, in this embodiment, the reinforcing ribs 110 are of a plate-shaped structure arranged along the horizontal direction, the reinforcing ribs 110 extend along the length direction of the side beam where the reinforcing ribs are located, the reinforcing ribs 110 divide the flue 103 into an upper layer and a lower layer, correspondingly, the flue gas inlet holes 101 are also arranged into two rows, each row of the flue gas inlet holes 101 corresponds to one layer of the flue 103, the flue gas of the two layers of the flue 103 is finally converged to the first side beam 106 and is discharged from the smoke discharge hole 102, the reinforcing ribs 110 are not arranged on the first side beam 106, or the reinforcing ribs 110 are arranged and the area of the smoke discharge hole 102 is increased, so that the reinforcing ribs are communicated with the two layers of the flue 103 simultaneously.

As shown in fig. 2, the battery pack according to the embodiment of the second aspect of the present invention includes the battery pack case, the battery cell 2 and the first explosion-proof valve 3 according to any of the above embodiments, the battery cell 2 is fixedly installed inside the battery pack case, and the first explosion-proof valve 3 is installed at the smoke exhaust hole 102.

The technical advantages of the battery pack of the second aspect embodiment of the present invention are the same as those of the battery pack case of the above-described embodiment, and are not described herein again.

In some embodiments, a second explosion-proof valve 201 is disposed on the electric core 2, the second explosion-proof valve 201 is disposed at one end of the electric core 2, and an end surface where the second explosion-proof valve 201 is located is arranged opposite to at least part of the smoke inlet 101, it can be understood that, in this embodiment, the second explosion-proof valve 201 is disposed on an end surface of the electric core 2 adjacent to the second side beam 107 and the fourth side beam 109, the smoke inlet 101 on the second side beam 107 and the fourth side beam 109 is arranged opposite to the second explosion-proof valve 201, and smoke discharged from the second explosion-proof valve 201 can quickly enter the flue 103 through the smoke inlet 101, so as to improve the efficiency of smoke discharge.

Furthermore, an interval is arranged between the end face where the second explosion-proof valve 201 is located and the inner wall face where the smoke inlet hole 101 is located, the interval can be used for rapid circulation of smoke inside the battery pack shell, the interval does not need to be too large, and the influence on the size of the battery pack is small.

It should be noted that, the utility model discloses battery pack designs according to the explosion-proof valve direction of an electricity core 2, and this kind of design is applicable to other explosion-proof valve orientation forms of electricity core 2 equally, if electricity core 2 explodes the valve down, up, only need the adjustment enter the position of cigarette hole 101 and the overall arrangement of flue 103 can.

The vehicle of the third aspect embodiment of the present invention includes the battery pack of any one of the above embodiments.

The technical advantages of the vehicle of the third aspect embodiment of the present invention are the same as those of the battery pack of the above-described embodiment, and are not described herein again.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the 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 explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, 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 meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like 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 present disclosure. 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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although the above embodiments have been shown and described, 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 to the above embodiments by those of ordinary skill in the art are intended to be within the scope of the present invention.

Claims

1. The battery pack shell is characterized by comprising a shell body, wherein a smoke inlet hole is formed in the inner wall surface of the shell body, a smoke exhaust hole is formed in the outer wall surface of the shell body, a flue is formed in the side wall of the shell body, and the smoke inlet hole is communicated with the smoke exhaust hole through the flue.

2. The battery pack housing of claim 1, wherein the housing body comprises a top plate, a bottom plate, and a plurality of side beams in series end to end forming a frame, the top plate being mounted on top of the frame, the bottom plate being mounted on bottom of the frame, the flue being disposed within at least one of the top plate, the bottom plate, and the side beams.

3. The battery pack housing of claim 2, wherein the side beams include a first side beam, a second side beam, a third side beam, and a fourth side beam, and wherein cavities are formed in the first side beam, the second side beam, the third side beam, and the fourth side beam, and wherein the cavities communicate with each other to form the flue.

4. The battery pack housing according to claim 3, wherein at least one of the first side member, the second side member, the third side member, and the fourth side member is provided with the smoke inlet hole on an inner wall surface thereof;

the smoke exhaust hole is formed in the outer wall surface of at least one of the first side beam, the second side beam, the third side beam and the fourth side beam.

5. The battery pack housing of claim 3, wherein the first side member, the second side member, the third side member and the fourth side member are each provided with a plurality of smoke inlet holes, and the plurality of smoke inlet holes are arranged at intervals along the length direction of the side member in which the smoke inlet holes are located;

6. The battery pack housing of claim 3, wherein the cavity further comprises a rib extending along a length of the side member in which the rib is located.

7. A battery pack, comprising:

the battery pack housing of any one of claims 1-6;

a battery cell disposed within the battery can body;

the first explosion-proof valve is arranged at the smoke exhaust hole.

8. The battery pack according to claim 7, wherein a second explosion-proof valve is disposed on the battery core, and an end face of the second explosion-proof valve is disposed opposite to at least a portion of the smoke inlet.

9. The battery pack according to claim 8, wherein a space is provided between the end face where the second explosion-proof valve is located and the inner wall face of the battery pack.

10. A vehicle characterized by comprising a battery pack according to any one of claims 7-9.