CN217641660U - Box body assembly, battery pack and vehicle - Google Patents

Abstract

The embodiment of the application provides a box body assembly, a battery pack and a vehicle. This box subassembly includes: the box body comprises a plurality of top-opening cavity structures, the cavity structures are used for placing the battery cores, the protective covers are arranged at the opening parts of the cavity structures, the protective covers and the cavity structures form closed spaces, and the closed spaces are used for isolating the battery cores. According to the embodiment of the application, the cavity structure is arranged in the box body, the cavity structure and the protective cover form the closed space, and then a single battery cell can be arranged in the independent closed space. When a single electric core is out of control, because of no fluid channel between the adjacent electric cores, the electric core that takes place out of control can not propagate to other electric cores department to can do benefit to the stability and the security of battery package, and then can guarantee personnel's safety in the vehicle.

Description

Box body assembly, battery pack and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to a box body assembly, a battery pack and a vehicle.

Background

With the popularization of electric vehicles, the safety of the electric vehicles is more and more concerned, wherein the safety performance of the battery pack of the electric vehicle is more and more required due to the poor thermal stability and high flammability of the lithium ion battery.

But can lead to it to propagate to other electric cores and take place thermal runaway when single electric core in the present battery module takes place thermal runaway, and then spread whole battery package, arouse the problem that whole car catches fire.

SUMMERY OF THE UTILITY MODEL

This application provides a box body subassembly, battery package and vehicle to the shortcoming of current mode for can lead to it to propagate to other electric cores and take place the technical problem of thermal runaway when solving single electric core emergence thermal runaway in the current battery module.

In a first aspect, an embodiment of the present application provides a box assembly for accommodating a battery module of a vehicle, where the battery module includes a plurality of battery cells, and the box assembly includes: a box body and a plurality of protective covers;

the box body comprises a plurality of top-opening cavity structures, the cavity structures are used for placing the battery cells, the protective cover is arranged at the opening of the cavity structures, the protective cover and the cavity structures form a closed space, and the closed space is used for isolating the battery cells.

Optionally, the protective cover includes mica plate and reinforcing plate, the mica plate sets up the reinforcing plate is close to one side of electricity core.

Optionally, the shield cap further comprises a filler fixture and a filler, the filler fixture being for fixing the filler; the filler fixture and filler are disposed between the mica board and the stiffener.

Optionally, the box body comprises a frame, and the frame is divided to form a plurality of cavity structures.

Optionally, the frame includes two first side frames disposed in parallel and two second side frames disposed in parallel, the first side frames are perpendicularly connected to the second side frames, the first side frames include at least two first sub frames, and the second side frames include at least two second sub frames.

Optionally, the first subframe is provided with a plurality of automatic explosion-proof valves, at least one of which is provided on the first subframe.

Optionally, the second peripheral frame is provided with a plurality of automatic explosion-proof valves, at least one of which is provided on the second sub-frame.

Optionally, the protective cover further comprises a housing, and the housing is arranged on one side, away from the box body, of the protective cover.

In a second aspect, an embodiment of the present application provides a battery pack, including: the battery module and the box body assembly of the first aspect, the battery module includes a plurality of electric cores, the electric core sets up in the enclosure space that cavity structure and protective cover of box body assembly formed.

In a third aspect, an embodiment of the present application provides a vehicle, including: a battery pack according to the second aspect.

The technical scheme provided by the embodiment of the application brings beneficial technical effects that:

by arranging the cavity structure in the box body and forming the closed space by the cavity structure and the protective cover, a single battery cell can be arranged in the independent closed space. When single electric core takes place thermal runaway, because of there is not fluid passage between the adjacent electric core, the electric core that takes place thermal runaway can not propagate to other electric cores departments to can do benefit to the stability and the security of battery package, and then can guarantee personnel's in the vehicle safety.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is an exploded view of a protective cover according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a box provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of an assembled case and a battery cell according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of an assembled box, a battery cell and a protective cover according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of the housing of FIG. 1 with the housing removed;

FIG. 8 is a schematic side view of the structure of FIG. 1;

fig. 9 isbase:Sub>A schematic cross-sectional view taken along linebase:Sub>A-base:Sub>A in fig. 8.

Description of reference numerals:

1-a box assembly;

11-a protective cover; 111-mica plate; 112-a reinforcement plate; 113-a fill fixture; 114-a filler;

12-a box body; 121-a cavity structure; 122-a frame; 1221-a first border; 1221 a-first subframe; 1222-a second frame; 1222 a-a second subframe;

13-automatic explosion-proof valve;

14-a housing;

2-a battery pack; 21-a battery module; 211-electric core.

Detailed Description

Embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the embodiments set forth below in connection with the drawings are exemplary descriptions for explaining technical solutions of the embodiments of the present application, and do not limit the technical solutions of the embodiments of the present application.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of other features, information, data, steps, operations, elements, components, and/or groups thereof, that may be implemented as required by the art. The term "and/or" as used herein means at least one of the items defined by the term, e.g., "a and/or B" may be implemented as "a", or as "B", or as "a and B".

To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.

The research and development idea of the application comprises: with the popularization of electric vehicles, the safety of the electric vehicles is also receiving more and more attention, wherein the safety performance of the battery pack of the electric vehicle is more and more required due to the poor thermal stability and high flammability of the lithium ion battery. But can lead to it to propagate to other electric cores and take place thermal runaway when single electric core in the present battery module takes place thermal runaway, and then spread whole battery package, arouse the problem that whole car catches fire.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. It should be noted that the following embodiments may be referred to, referred to or combined with each other, and the description of the same terms, similar features, similar implementation steps and the like in different embodiments is not repeated.

The embodiment of the present application provides a box assembly 1 for hold battery module 21 of vehicle, battery module 21 includes a plurality of electric cores 211, and the schematic structural diagram of this box assembly 1 is as shown in fig. 1 to fig. 9, includes: a case 12 and a plurality of protective covers 11.

The box 12 includes a plurality of open-top cavity structures 121, and cavity structure 121 is used for placing electric core 211, and protective cover 11 sets up at cavity structure 121's opening part, and protective cover 11 forms the enclosure space with cavity structure 121, and the enclosure space is used for keeping apart electric core 211.

In this embodiment, by disposing the cavity structure 121 in the box 12, and forming the enclosed space by the cavity structure 121 and the protective cover 11, the single battery cell 211 can be disposed in an independent enclosed space. When single electric core 211 takes place thermal runaway, because of there is not fluid passage between the adjacent electric core 211, the electric core 211 that takes place thermal runaway can not propagate to other electric cores 211 departments to can do benefit to the stability and the security of battery package, and then can guarantee personnel's in the vehicle safety.

Optionally, the protective cover 11 includes a mica board 111 and a reinforcing board 112, and the mica board 111 is disposed on a side of the reinforcing board 112 close to the electric core 211.

In this embodiment, mica plate 111 sets up in reinforcing plate 112 one side that is close to electric core 211, and when electric core 211 took place the thermal runaway, high temperature hot gas flow spouted to mica plate 111, because of mica plate 111 has electrical breakdown resistance and thermal-insulated effect, then mica plate 111 can do benefit to and bear high temperature hot gas flow, avoids high temperature hot gas flow to puncture mica plate 111, and then can do benefit to the safety of protection battery package 2. Keep away from electric core 211 one side at mica plate 111 and set up reinforcing plate 112, further can strengthen the intensity of protective cover 11, can avoid electric core 211 to take place to strike protective cover 11 after the thermal runaway and lead to protective cover 11 to damage the scheduling problem, be favorable to protecting protective cover 11's completion.

Optionally, protective cover 11 further includes a filler fixture 113 and a filler 114, filler fixture 113 is used for fixing filler 114; the filler fixture 113 and the filler 114 are disposed between the mica boards 111 and the reinforcing plates 112.

In this embodiment, the filling fixing member 113 and the filler 114 are disposed between the mica plate 111 and the reinforcing plate 112, and the filler 114 has the functions of electrical breakdown resistance and thermal insulation, so that when the battery cell 211 is out of control due to heat, the filler 114 can further ensure the safety of the protective cover 11, and further can protect the safety of the battery pack 2; and the filler fixture 113 can contribute to enhancing the rigidity and strength of the integrated shield cover 11, and can contribute to enhancing the adhesion between the mica board 111 and the reinforcing plate 112.

Specifically, the filler fixture 113 may be a mica honeycomb frame and the filler 114 may be a high dielectric constant filler such as ceramic fiber, aerogel, and mica.

Optionally, the housing 12 includes a frame 122, and the frame 122 is divided to form a plurality of cavity structures 121.

Optionally, the frame 122 includes two first subframes 1221 arranged in parallel and two second subframes 1222 arranged in parallel, the first subframes 1221 are perpendicularly connected to the second subframes 1222, the first subframes 1221 include at least two first subframes 1221a, and the second subframes 1222 include at least two second subframes 1222a.

In this embodiment, the first subframe 1221 includes at least two first subframes 1221a, and one first subframe 1221a may be a frame of one chamber structure 121; the second rim 1222 includes at least two second subframes 1222a, and one second subframe 1222a may be another rim of one cavity structure 121.

Alternatively, the first sub-frame 1221 is provided with a plurality of automatic explosion-proof valves 13, and at least one automatic explosion-proof valve 13 is provided on the first sub-frame 1221 a.

In this embodiment, the first frame 1221 is provided with a plurality of automatic explosion-proof valves 13, when the battery cell 211 is out of control due to heat, the pressure in the enclosed space formed by the cavity structure 121 and the protective cover 11 rises, and the automatic explosion-proof valves 13 open and relieve the pressure in the enclosed space; after the pressure release is accomplished, the pressure in the enclosure reduces, and automatic explosion-proof valve 13 is closed, can do benefit to and avoid oxygen among the outside air to enter into in the enclosure and lead to the problem of thermal runaway aggravation to can do benefit to the safety of guaranteeing battery package 2.

Therefore, in the embodiment of the application, a closed space is formed by the cavity structure 121 and the protective cover 11 to isolate the single battery cell 211, so that a flow channel is prevented from being formed between the adjacent battery cells 211, and at least one automatic explosion-proof valve 13 is arranged on the first sub-frame 1221a to form a dredging channel for hot air flow, so that the safety of the battery pack 2 is protected in a combined manner of isolation and dredging, and further the safety of personnel in the vehicle is ensured.

Optionally, the second frame 1222 is provided with a plurality of automatic explosion-proof valves 13, at least one automatic explosion-proof valve 13 being provided on the second sub-frame 1222a.

In this embodiment, set up at least one automatic explosion-proof valve 13 on the sub-frame 1222a of second, can further strengthen the mediation effect, when guaranteeing that electric core 211 takes place the thermal runaway, can in time carry out the pressure release to the high pressure in the enclosure space, be favorable to guaranteeing the safety of battery package 2.

Optionally, the case assembly 1 further comprises a housing 14, the housing 14 being disposed on a side of the protective cover 11 remote from the case 12.

In this embodiment, the housing 14 is disposed on a side of the protecting cover 11 away from the box 12, so as to further protect the protecting cover 11 and the box 12, which is beneficial to enhancing the strength and safety of the whole box assembly 1.

Based on the same inventive concept, an embodiment of the present application provides a battery pack 2, and a schematic structural diagram of the battery pack 2 is shown in fig. 1 and fig. 2, where the battery pack 2 includes: the battery module 21 and the box assembly 1 that above-mentioned embodiment provided, battery module 21 include a plurality of electric cores 211, and electric core 211 sets up in the enclosure space that cavity structure 121 and protective cover 11 of box assembly 1 formed.

In this embodiment, by disposing the cavity structure 121 in the box 12, and forming the enclosed space by the cavity structure 121 and the protective cover 11, the single battery cell 211 can be disposed in an independent enclosed space. When a single battery core 211 is out of control, because of no fluid channel between the adjacent battery cores 211, the battery core 211 in which the out of control is out of control can not be propagated to other battery cores 211, thereby being beneficial to the stability and the safety of a battery pack and further ensuring the safety of personnel in a vehicle.

When the battery cell 211 is out of control due to heat, the pressure in the enclosed space formed by the cavity structure 121 and the protective cover 11 rises, the automatic explosion-proof valve 13 is opened, and the pressure in the enclosed space is released; after the pressure release is accomplished, the pressure in the enclosure reduces, and automatic explosion-proof valve 13 is closed, can do benefit to and avoid oxygen among the outside air to enter into in the enclosure and lead to the problem of thermal runaway aggravation to can do benefit to the safety of guaranteeing battery package 2.

This application forms the enclosure space in order to keep apart single electric core 211 through setting up cavity structures 121 and protective cover 11, avoids forming flow channel between the adjacent electric core 211, and, through set up at least one automatic explosion-proof valve 13 on first sub-frame 1221a, forms the mediation passageway of hot gas flow, then this application is through the mode that keeps apart and mediation combine together, is favorable to protecting the safety of battery package 2, and then guarantees personnel's in the vehicle safety.

Based on the same inventive concept, the embodiment of the present application provides a vehicle, which includes the battery pack 2 provided in the above embodiment.

In this embodiment, since the vehicle includes the battery pack 2 provided in the above embodiment, beneficial effects of the vehicle also include beneficial effects of the battery pack 2, which are not described herein again.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

1. the cavity structure is arranged in the box body, the cavity structure and the protective cover form a closed space, and then a single battery cell can be arranged in the independent closed space. When a single electric core is out of control, because of no fluid channel between the adjacent electric cores, the electric core that takes place out of control can not propagate to other electric cores department to can do benefit to the stability and the security of battery package, and then can guarantee personnel's safety in the vehicle.

2. The mica plate that this application embodiment provided sets up the one side that is close to electric core at the reinforcing plate, and when electric core took place the thermal runaway, high temperature hot gas flow spouted to the mica plate, because of the mica plate has the electrical breakdown and thermal-insulated effect, then the mica plate can do benefit to and bear high temperature hot gas flow, avoids high temperature hot gas flow to puncture the mica plate, and then can do benefit to the safety of protection battery package.

3. The embodiment of the application provides set up the reinforcing plate in one side of keeping away from electric core at the mica plate, further can strengthen the intensity of protective cover, can avoid electric core to take place to strike the protective cover after the thermal runaway and lead to the protective cover to damage the scheduling problem, is favorable to protecting the complete of protective cover.

4. When the battery cell is out of control due to heat, the pressure in the closed space formed by the cavity structure and the protective cover is increased, the automatic explosion-proof valve is opened, and the pressure in the closed space is relieved; after the pressure release is accomplished, the pressure in the enclosure space reduces, and automatic explosion-proof valve closes, can do benefit to and avoid oxygen among the outside air to enter into in the enclosure space and lead to the problem of thermal runaway aggravation to can do benefit to the safety of guaranteeing the battery package.

5. The utility model provides a form enclosure space in order to keep apart single electric core through setting up cavity structures and protective cover, avoid forming flow channel between the adjacent electric core to and, through set up at least one automatic explosion-proof valve on first subframe, form the mediation passageway of hot gas flow, then this application is favorable to protecting the safety of battery package through the mode that keeps apart and dredge and combine together, and then guarantees personnel's safety in the vehicle.

6. The embodiment of the application provides set up at least one automatic explosion-proof valve on the sub-frame of second, can further strengthen the mediation effect, when guaranteeing that electric core takes place the thermal runaway, can in time carry out the pressure release to the high pressure in the enclosure space, be favorable to guaranteeing the safety of battery package.

7. The casing setting that this application embodiment provided keeps away from one side of box at the protective cover, further protects the safety of protective cover and box, is favorable to strengthening the intensity and the security performance of whole box subassembly.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, various operations, methods, steps, measures, schemes in the various processes, methods, procedures that have been discussed in this application may be alternated, modified, rearranged, decomposed, combined, or eliminated. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are for convenience of description or simplicity of describing the embodiments of the present application based on the exemplary directions or positional relationships shown in the drawings, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present application.

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 implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

It should be understood that, although the steps in the flowcharts of the figures are shown in sequence as indicated by the arrows, the order in which the steps are performed is not limited to the sequence indicated by the arrows. In some implementations of the embodiments of the present application, the steps in the various flows may be performed in other sequences as desired, unless explicitly stated otherwise herein. Moreover, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages, depending on the actual implementation scenario. Some or all of the sub-steps or phases may be executed at the same time, or may be executed at different times in a scenario where the execution time is different, and the execution order of the sub-steps or phases may be flexibly configured according to the requirement, which is not limited in this embodiment of the application.

The foregoing is only a part of the embodiments of the present application, and it should be noted that it is within the scope of the embodiments of the present application that other similar implementation means based on the technical idea of the present application can be adopted by those skilled in the art without departing from the technical idea of the present application.

Claims (10)

1. The utility model provides a box subassembly for hold the battery module of vehicle, the battery module includes a plurality of electric cores, its characterized in that, the box subassembly includes: a box body and a plurality of protective covers;

the box includes a plurality of open-top's cavity structures, cavity structures is used for placing electric core, the protective cover sets up cavity structures's opening part, the protective cover with cavity structures forms the enclosure space, the enclosure space is used for keeping apart electric core.

2. The box assembly of claim 1, wherein the protective cover comprises a mica board and a stiffener, the mica board being disposed on a side of the stiffener adjacent to the cell.

3. The cabinet assembly of claim 2, wherein the shield cover further comprises a filler fixture and a filler, the filler fixture for securing the filler; the filler fixture and filler are disposed between the mica board and the stiffener.

4. A cabinet assembly as claimed in claim 1, wherein the cabinet includes a frame which is divided to form a plurality of the cavity structures.

5. A box assembly according to claim 4, wherein the frame comprises two relatively parallel arranged first side frames and two relatively parallel arranged second side frames, the first side frames being perpendicularly connected to the second side frames, the first side frames comprising at least two first sub-frames, the second side frames comprising at least two second sub-frames.

6. A tank assembly as claimed in claim 5, characterised in that the first subframe is provided with a plurality of automatic burst valves, at least one of which is provided on the first subframe.

7. A tank assembly as claimed in claim 6, wherein the second peripheral frame is provided with a plurality of automatic burst valves, at least one of which is provided on the second sub-frame.

8. The bin assembly of claim 1, further comprising a housing disposed on a side of the guard cover remote from the bin.

9. A battery pack, comprising a battery module and the box assembly of any one of claims 1 to 8, wherein the battery module comprises a plurality of battery cells, and the battery cells are disposed in an enclosed space formed by a cavity structure and a protective cover of the box assembly.

10. A vehicle characterized by comprising the battery pack according to claim 9.

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