CN216288635U - Thermal protection structure, battery module, power battery package and vehicle - Google Patents

Abstract

The application provides a hot protective structure, battery module, power battery package and vehicle, hot protective structure is used for dispelling the heat for the battery module. Hot protective structure includes the upper cover roof, the upper cover roof cover is located on a plurality of electric cores of battery module, the upper cover roof has the heat conduction passageway, a plurality of inlet ports have been seted up to the heat conduction passageway, and is a plurality of the inlet port with heat conduction passageway intercommunication and with a plurality of the position of electric core is corresponding, the inlet port is used for from a plurality of the explosion-proof valve combustion gas of electric core is leading-in the heat conduction passageway, and along the relative both ends of heat conduction passageway extending direction are discharged to avoided high temperature high-pressure gas to lead to hot protective structure phenomenon such as high temperature and deformation to the assurance battery module is healthy, work safely.

Description

Thermal protection structure, battery module, power battery package and vehicle

Technical Field

The application relates to the technical field of battery modules, in particular to a thermal protection structure, a battery module with the thermal protection structure, a power battery pack with the battery module and a vehicle with the power battery pack.

Background

The battery module is used as an energy supply device of the electric automobile, and the quality of the performance of the battery module plays a crucial role in the development of the whole electric automobile industry. The structure of the conventional battery module generally includes: the module box body, arrange a plurality of electric cores, connection piece and the module upper cover that sets up in the module box body, wherein, realize the electricity through the connection piece between a plurality of electric cores and connect, the module upper cover seals the module box body, so that electric core and external world are insulated.

However, in the use of battery module, when thermal runaway appeared in certain electric core, the explosion-proof valve of thermal runaway electric core will be opened, and then the inside high-temperature gas of this thermal runaway electric core can be followed the explosion-proof valve blowout, and strike extremely the module upper cover causes the module upper cover is heated and is out of shape, can jack-up this module upper cover even. Moreover, the connection piece fully contacts with high-temperature gas and the temperature rises, if the heat dissipation cooling in time can not be carried out, the connection piece can transmit the heat to inside the adjacent electric core, the temperature of making whole battery module rises, probably causes the life-span of battery module to shorten or damage battery module, also appears the potential safety hazard very easily moreover.

Therefore, how to solve the problem of heat dissipation and temperature reduction after the thermal runaway of the battery cell becomes a problem which needs to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, an object of the present application is to provide a thermal protection structure, a battery module, a power battery pack and a vehicle having the same, which are capable of solving the problems of high temperature and deformation of the module upper cover caused by thermal runaway of individual cells, and achieving better heat dissipation performance and safer battery module.

In order to solve the technical problem, the application provides a thermal protection structure for radiating heat of a battery module. Hot protective structure includes the upper cover roof, the upper cover roof cover is located on a plurality of electric cores of battery module, the upper cover roof has the heat conduction passageway, a plurality of inlet ports have been seted up to the heat conduction passageway, and is a plurality of the inlet port with the heat conduction passageway intercommunication and with a plurality of the position of electric core is corresponding, the inlet port is used for will be from a plurality of the explosion-proof valve combustion gas of electric core is leading-in the heat conduction passageway, and along the relative both ends discharge of heat conduction passageway extending direction.

In an exemplary embodiment, the thermal protection structure further comprises: the battery cover comprises an upper cover side plate and an upper cover bottom plate, wherein the upper cover side plate is connected to one side, facing towards the battery core, of the upper cover top plate, the upper cover bottom plate is connected with one end, facing away from the upper cover side plate, of the upper cover top plate, the upper cover side plate and the upper cover bottom plate form a heat conduction channel with the upper cover top plate, and a plurality of air inlets corresponding to the explosion-proof valves are formed in the upper cover bottom plate.

In an exemplary embodiment, the top plate of the upper cover comprises a top plate assembly and two connecting assemblies, the two connecting assemblies are respectively and fixedly connected with the side surfaces of the top plate assembly, the top plate assembly is provided with a plurality of honeycomb holes at positions corresponding to the heat conducting channels, and each honeycomb hole is communicated with the heat conducting channel.

In an exemplary embodiment, the upper cover side plate includes a first side plate and a second side plate, one end of each of the first side plate and the second side plate is connected to one side of the top plate assembly facing the battery cell, the upper cover bottom plate is connected to one end of the first side plate and the second side plate facing away from the top plate assembly, and the upper cover bottom plate, the first side plate, the second side plate, and the top plate assembly enclose the heat conducting channel.

In an exemplary embodiment, a plurality of air inlet holes are distributed along the length direction of the upper cover bottom plate, and the distribution positions of the air inlet holes are aligned with the position of an explosion-proof valve of the battery cell.

The application also provides a battery module, and the battery module comprises the above thermal protection structure provided by the technical scheme.

In an exemplary embodiment, the battery module still includes the module box, the module box includes the end plate of two relative settings and the curb plate of two relative settings, two the end plate and two the curb plate is end to end connection in proper order and is formed the module box, it is a plurality of the electricity core arrange set up in the module box, the upper cover roof include the roof subassembly and respectively with two coupling assembling of the both sides fixed connection of roof subassembly, two coupling assembling respectively with two curb plate fixed connection, hot protective structure includes upper cover bottom plate, the mounting hole has been seted up respectively to the relative both ends of upper cover bottom plate, upper cover bottom plate and two the end plate pass through the mounting with fixed connection is realized in the assembly of mounting hole.

In an exemplary embodiment, the battery module further includes an insulating support and a connecting sheet, the insulating support is located between the thermal protection structure and the electric cores, the insulating support is used for insulating the electric cores from the outside, the connecting sheet is embedded in the insulating support and realizes multiple electric connections between the electric cores, the insulating support is provided with multiple air outlets in one-to-one correspondence with the multiple air inlets, and the multiple air outlets are communicated with the multiple air inlets and the heat conduction channel.

The application also provides a power battery pack, and the power battery pack comprises a plurality of the battery modules provided by the technical scheme.

The application also provides a vehicle, and the vehicle comprises the power battery pack provided by the technical scheme.

In summary, in the hot protective structure of this application, have this hot protective structure's battery module, power battery package and vehicle, hot protective structure's upper cover roof includes the roof subassembly with coupling assembling, the roof subassembly with coupling assembling forms the enclosure space with the module box, the roof subassembly with the upper cover curb plate with the upper cover bottom plate forms the heat conduction passageway, be equipped with a plurality ofly on the roof subassembly honeycomb holes, be equipped with a plurality ofly on the upper cover bottom plate the inlet port. When a certain electric core is out of control due to heat, high-temperature high-pressure gas is sprayed out of the explosion-proof valve of the electric core, enters the heat conduction channel through the air inlet holes, is discharged from the opposite ends and the plurality of honeycomb holes of the heat conduction channel, and avoids the phenomena of high temperature, deformation and the like of a heat protection structure caused by the high-temperature high-pressure gas, so that the battery module is ensured to work healthily and safely.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a battery module disclosed in an embodiment of the present application;

fig. 2 is an exploded view of the battery module shown in fig. 1;

FIG. 3 is a schematic front view of a thermal protection structure according to an embodiment of the present disclosure;

FIG. 4 is a schematic bottom view of a thermal protection structure according to an embodiment of the present disclosure;

FIG. 5 is a schematic side view of a thermal protection structure according to an embodiment of the present disclosure;

FIG. 6 is an exploded view of the thermal protection structure of FIG. 3;

FIG. 7 is a schematic structural diagram of a top cover plate of a thermal protection structure disclosed in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of an upper cover side plate of a thermal protection structure disclosed in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of an upper cover plate of a thermal protection structure according to an embodiment of the present disclosure;

fig. 10 is a schematic cross-sectional view of the battery module shown in fig. 1 taken along the direction I-I;

fig. 11 is a schematic structural view of a connecting sheet and a buffer foam of a battery module disclosed in an embodiment of the present application;

fig. 12 is a schematic structural diagram of a power battery pack disclosed in an embodiment of the present application;

fig. 13 is a schematic structural view of another battery module disclosed in the embodiment of the present application;

fig. 14 is a schematic structural view of a third battery module disclosed in the embodiment of the present application;

fig. 15 is an exploded view of the battery module shown in fig. 14;

fig. 16 is a front view of a third thermal protection structure disclosed in the embodiments of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). Directional phrases used in this application, such as, for example, "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the appended drawings and are, therefore, used herein for better and clearer illustration and understanding of the application and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the application.

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 being fixedly connected, detachably connected, or integrally connected; may be a mechanical 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. It should be noted that the terms "first", "second", and the like in the description and claims of the present application and in the drawings are used for distinguishing between different objects and not for describing a particular order.

Furthermore, the terms "comprises," "comprising," "includes," "including," or "including," when used in this application, specify the presence of stated features, operations, elements, and/or the like, but do not limit one or more other features, operations, elements, and/or the like. Furthermore, the terms "comprises" or "comprising" indicate the presence of the respective features, numbers, operations, elements, components, or combinations thereof disclosed in the specification, but do not preclude the presence or addition of one or more other features, numbers, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The battery module is used as an energy supply device of the electric automobile, and the quality of the performance of the battery module plays a crucial role in the development of the whole electric automobile industry. The structure of the conventional battery module generally includes: the module box body, arrange a plurality of electric cores, connection piece and the module upper cover that sets up in the module box body, wherein, realize the electricity through the connection piece between a plurality of electric cores and connect, the module upper cover seals the module box body, so that electric core and external world are insulated. However, in the use of battery module, when thermal runaway appeared in certain electric core, the explosion-proof valve of thermal runaway electric core will be opened, and then the inside high-temperature gas of this thermal runaway electric core can be followed the explosion-proof valve blowout, and strike extremely the module upper cover causes the module upper cover is heated and is out of shape, can jack-up this module upper cover even. Moreover, the connection piece fully contacts with high-temperature gas and the temperature rises, if the heat dissipation cooling in time can not be carried out, the connection piece can transmit the heat to inside the adjacent electric core, the temperature of making whole battery module rises, probably causes the life-span of battery module to shorten or damage battery module, also appears the potential safety hazard very easily moreover.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a battery module disclosed in an embodiment of the present application, and fig. 2 is a schematic exploded structural diagram of the battery module shown in fig. 1. In the embodiment of the present application, the battery module 1000 includes a thermal protection structure 100, a module case 200, a plurality of battery cells 400, an insulating support 500, and a connecting sheet 600. The module box body 200 includes two end plates 210 disposed oppositely and two side plates 230 disposed oppositely, the two end plates 210 and the two side plates 230 are sequentially connected end to form the module box body 200, for example, two opposite ends of one side plate 230 are connected to the two end plates 210 respectively, and two opposite ends of one end plate 210 are connected to the two side plates 230 respectively. A plurality of the battery cells 400 are arranged in the module case 200. The thermal protection structure 100 covers the module case 200 to form an enclosed space with the module case 200, and the plurality of battery cells 400 are installed in the enclosed space to insulate the battery cells 400 from the outside. The insulating support 500 is located between the thermal protection structure 100 and the battery cell 400, that is, one side of the insulating support 500 covers the battery cell 400, the thermal protection structure 100 covers the opposite side of the insulating support 500, the insulating support 500 is used for insulating the battery cell 400 from the outside, the connecting piece 600 is embedded in the insulating support 500 and used for realizing the electrical connection between the battery cells 400, and the insulating support 500 is provided with a plurality of exhaust ports 510.

In the embodiment of the present application, an explosion-proof valve 410 is disposed at one end of the battery cell 400 facing the thermal protection structure 100, and when thermal runaway occurs in a certain battery cell 400, high-temperature and high-pressure gas generated in the battery cell 400 can be ejected from the explosion-proof valve 410.

It is understood that the connection between the end plate 210 and the side plate 230 may be a detachable connection, such as a snap connection, a hinge connection, a bolt connection, etc., and the present application is not limited thereto.

Referring to fig. 3 to 5, fig. 3 is a front view structural schematic diagram of a thermal protection structure disclosed in the embodiment of the present application, fig. 4 is a bottom view structural schematic diagram of the thermal protection structure disclosed in the embodiment of the present application, and fig. 5 is a side view structural schematic diagram of the thermal protection structure disclosed in the embodiment of the present application. As shown in fig. 3, 4 and 5, the present application provides a thermal protection structure 100 comprising: the battery module 1000 comprises an upper cover top plate 10, wherein the upper cover top plate 10 covers a plurality of battery cells 400 of the battery module 1000, the upper cover top plate 10 is provided with a heat conduction channel 50, the heat conduction channel 50 is provided with a plurality of air inlets 31, the air inlets 31 are communicated with the heat conduction channel 50 and correspond to the positions of the battery cells 400, and the air inlets 31 are used for guiding gas discharged from the explosion-proof valves 410 of the battery cells 400 into the heat conduction channel 50 and discharging the gas along two opposite ends of the extending direction of the heat conduction channel 50.

The thermal protection structure 100 further comprises: upper cover curb plate 20 and upper cover bottom plate 30, upper cover curb plate 20 connect in upper cover roof 10 orientation one side of electricity core 400, upper cover bottom plate 30 with upper cover curb plate 20 is back to one end of upper cover roof 10 is connected, upper cover curb plate 20 with upper cover bottom plate 30 with upper cover roof 10 forms heat conduction channel 50, seted up on the upper cover bottom plate 30 with a plurality of the explosion-proof valve 410 corresponds a plurality of respectively inlet port 31. The plurality of air outlets 51 correspond to the plurality of air inlets 31 one by one, and the plurality of air outlets 510 communicate with the plurality of air inlets 31 and the heat conducting passage 50.

In an exemplary embodiment, the thermal protection structure 100 may be a module cover.

To sum up, the hot protective structure 100 of this application is equipped with upper cover top plate 10, upper cover curb plate 20 and upper cover bottom plate 30 to form heat conduction channel 50 by upper cover top plate 10 and upper cover curb plate 20 and upper cover bottom plate 30, a plurality of inlet ports 31 have been seted up on the upper cover bottom plate 30, and are a plurality of inlet ports 31 with heat conduction channel 50 communicates. When a certain battery cell 400 is out of thermal runaway, high-temperature and high-pressure gas is sprayed out of the explosion-proof valve 410 of the battery cell 400, enters the heat conduction channel 50 through the air inlet 31, is discharged from two opposite ends of the heat conduction channel 50, and is prevented from being heated, the protection structure 100 is prevented from being high-temperature and deformed, and the like, so that the battery module 1000 can be ensured to work healthily and safely.

Referring to fig. 6 and 7 together, fig. 6 is an exploded view of a thermal protection structure shown in fig. 3, and fig. 7 is a structural view of an upper cover top plate of the thermal protection structure disclosed in the embodiment of the present application. As shown in fig. 6 and 7, in the embodiment of the present application, the upper cover top plate 10 includes a top plate assembly 11 and two connecting assemblies 12, the top plate assembly 11 may be a plate-shaped structure, the connecting assemblies 12 may be a plate-shaped structure and are fixedly connected to two opposite sides of the top plate assembly 11, the top plate assembly 11 and the connecting assemblies 12 form the upper cover top plate 10, and the upper cover top plate 10 is used for forming a closed space with the module case 200.

In an exemplary embodiment, the top plate assembly 11 may have a rectangular plate-shaped structure, and the top plate assembly 11 is opened with a plurality of honeycomb holes 13 at positions corresponding to the heat conducting channels 50, and each honeycomb hole 13 is communicated with the heat conducting channel 50. The two connecting components 12 may be two rectangular plate-shaped structures with the same structure and size, and respectively intersect and are fixedly connected with two corresponding side surfaces of the top plate component 11.

In an exemplary embodiment, the plurality of honeycomb holes 13 are distributed in four rows and twenty three columns corresponding to the positions of the heat conducting channels 50 on the top plate assembly 11, that is, in a 4 × 23 matrix, and the spacing between adjacent honeycomb holes 13 in any one row is equal, and the spacing between adjacent honeycomb holes 13 in any two columns is equal. Four rows of the honeycomb holes 13 are arranged along the length direction of the top plate assembly 11, which is the direction of arrow 001 in fig. 7, and are parallel to the connecting assembly 12. Twenty three rows of the honeycomb holes 13 are arranged along the width direction of the top plate member 11, which is the direction of the arrow 002 in fig. 7, and are perpendicular to the connecting member 12. In the embodiment of the present application, the honeycomb holes 13 are arranged in the length direction of the top plate assembly 11 as a whole, and are located at the middle position in the width direction of the top plate assembly 11.

In the embodiment of the present application, the two connecting assemblies 12 perpendicularly intersect and are fixedly connected to two opposite side surfaces of the top plate assembly 11, and the length of the connecting assemblies is consistent with the length of the side surfaces of the top plate assembly 11. The connecting assembly 12 extends toward the battery cell 400, and a side of the connecting assembly 12 facing away from the battery cell 400 is flush with a surface of the top plate assembly 11 facing away from the battery cell 400.

In other embodiments, the top plate 10 may also be formed by integral molding, for example, two opposite sides of the top plate 10 are bent toward the battery cells 400 to form the top plate assembly 11 and the connecting assembly 12. The material of the top plate component 11 and the connecting component 12 can be mica with insulating and high temperature resistant properties.

Referring to fig. 8 and 9 together, fig. 8 is a schematic structural view of an upper cover side plate of a thermal protection structure disclosed in the embodiment of the present application, and fig. 9 is a schematic structural view of an upper cover bottom plate of the thermal protection structure disclosed in the embodiment of the present application.

As shown in fig. 8 and 9, in the embodiment of the present application, the upper cover side plate 20 includes a first side plate 21 and a second side plate 22, and each of the first side plate 21 and the second side plate 22 may have an elongated prism structure, and one end of each of the first side plate 21 and the second side plate 22 is connected to one side of the top plate assembly 11 of the upper cover top plate 10, which faces the battery cell 400. The upper cover bottom plate 30 is a plate-shaped structure and is connected to one end of the first side plate 21 and the second side plate 22 opposite to the top plate assembly 11, so that the heat conducting channel 50 is enclosed by the upper cover bottom plate 30, the first side plate 21, the second side plate 22 and the top plate assembly 11. The upper cover bottom plate 30 is provided with a plurality of air inlets 31 communicated with the heat conducting channel 50.

In an exemplary embodiment, the first side plate 21 and the second side plate 22 may be rectangular parallelepiped structures with the same size. The first side plate 21 and the second side plate 22 are respectively arranged on two sides of the four rows of the honeycomb holes 13 in parallel, and one side of the first side plate 21 and one side of the second side plate 22 departing from the battery cell 400 are flush with and fixedly connected to the surface of the upper cover top plate 10 facing the battery cell 400. The upper cover bottom plate 30 may be a rectangular plate-shaped structure, and is located between the first side plate 21 and the second side plate 22, and the upper cover bottom plate 30 is perpendicular to the first side plate 21 and is respectively fixedly connected to the first side plate 21 and the second side plate 22.

In an exemplary embodiment, the first side plate 21 and the second side plate 22 may be parallel to and have the same length as the connection assembly 12, and one side of the first side plate 21 and the second side plate 22 facing the battery cell 400 is flush with and fixedly connected to a surface of the upper cover bottom plate 30 facing the battery cell 400. The opposite side surfaces of the first side plate 21 and the second side plate 22 are respectively flush with the opposite side surfaces of the upper cover bottom plate 30 in the length direction, and the length of the upper cover bottom plate 30 is greater than that of the upper cover top plate 10, that is, the upper cover bottom plate 30 is not completely covered by the upper cover top plate 10.

In an exemplary embodiment, the number of the air inlet holes 31 is six, and the air inlet holes 31 are distributed along the length direction of the upper cover bottom plate 30, and the distribution positions of the air inlet holes 31 are aligned with the explosion-proof valves 410 of the battery cells 400, so that high-temperature and high-pressure air ejected from the explosion-proof valves 410 can enter the heat conducting channel 50 through the air inlet holes 31. Two mounting holes 32 are respectively formed at two opposite ends of the upper cover bottom plate 30, that is, two opposite ends of the upper cover bottom plate 30 not covered by the upper cover top plate 10, and the thermal protection structure 100 is mounted on the end plate 210 by assembling a fixing member with the mounting holes 32, and a closed space is formed. In the embodiment of the present application, the fixing member may be a bolt.

In the present embodiment, the upper cover side plate 20 and the upper cover bottom plate 30 may be formed by integral molding, for example, the upper cover side plate 20 may be formed by bending the upper cover bottom plate 30 along two opposite sides of the length direction toward the top plate assembly 11. The material of the upper cover side plate 20 and the upper cover bottom plate 30 may be mica having insulating and high temperature resistant properties.

Specifically, referring to fig. 10, fig. 10 is a schematic cross-sectional view of the battery module shown in fig. 1 along the direction I-I. As shown in fig. 10, when a certain battery cell 400 is thermally runaway, high-temperature and high-pressure gas ejected from the explosion-proof valve 410 enters the heat conducting channel 50 through the gas inlet hole 31, and then is discharged through the opposite ends of the heat conducting channel 50 and the plurality of honeycomb holes 13, wherein the high-temperature and high-pressure gas is mainly discharged through the opposite ends of the heat conducting channel 50, and a small amount of high-temperature and high-pressure gas is discharged from the plurality of honeycomb holes 13. In addition, the plurality of honeycomb holes 13 also serve to reduce the pressure in the heat conducting channel 50, prevent the impact of high-temperature and high-pressure gas on the top cover plate 10, and avoid the deformation of the heat protection structure 100 caused by excessive pressure.

Referring to fig. 11, fig. 11 is a schematic structural view of a connecting sheet and a buffer foam of a battery module according to an embodiment of the present disclosure. In the embodiment of the present application, the battery module 1000 further includes a buffering foam 40, the buffering foam 40 is fixed to the connecting sheet 600 deviates from the surface of the battery core 400, so as to realize the flexible connection between the thermal protection structure 100 and the connecting sheet 600. The material of the buffer foam 40 may be silica aerogel. In the embodiment of the present application, the cushion foam 40 may be integrally formed with the connection piece 600.

Please refer to fig. 12, which is a schematic structural diagram of a power battery pack disclosed in the embodiment of the present application. In the present embodiment, the power battery pack 2000 includes a plurality of the battery modules 1000, a battery pack case 1100, and a battery pack upper cover 1200. The plurality of battery modules 1000 are embedded in the battery pack case 1100, and the battery pack upper cover 1200 covers the battery pack case 1100 and is connected to the battery pack case 1100. A plurality of buffering pads (not shown) are arranged between the battery pack upper cover 1200 and the thermal protection structure 100, and the buffering pads are in a cross-shaped structure and used for preventing the top plate assembly 11 from directly contacting the battery pack upper cover 1200 and forming a certain gap, so that high-temperature and high-pressure gas in the battery cell can be conveniently discharged after thermal runaway. The material of the cushion pad may be silica aerogel. In the present embodiment, the cushion pad may be integrally formed with the top plate assembly 11.

Referring to fig. 13, fig. 13 is a schematic structural diagram of another battery module disclosed in the embodiment of the present application. The top cover top plate of the present embodiment is different from the top cover top plate 10 of the first embodiment in that the top plate assembly 11 is not perforated with the plurality of honeycomb holes 13.

In an exemplary embodiment, the top plate assembly 11 may be a rectangular plate-shaped structure, and the connecting assembly 12 may be two rectangular plate-shaped structures having the same structure and size, and respectively intersect and are fixedly connected to two corresponding sides of the top plate assembly 11. Specifically, two coupling assembling 12 respectively with two opposite sides of roof subassembly 11 intersect perpendicularly and fixed connection, and its length and fixed connection the length of roof subassembly 11 side is unanimous, coupling assembling 12 orientation the direction of electricity core 400 extends, coupling assembling 12 is back to one side of electricity core 400 with roof subassembly 11 is back to the face of electricity core 400 flushes.

Specifically, when a certain electrical core 400 is out of thermal runaway, high-temperature and high-pressure gas ejected from the explosion-proof valve 410 enters the heat conducting channel 50 through the air inlet hole 31, and then is discharged through the two opposite ends of the heat conducting channel 50. Since the honeycomb holes 13 are not provided, when the high-temperature and high-pressure gas ejected from the explosion-proof valve 410 is too large, the pressure in the heat conducting channel 50 may be rapidly increased, and if the both ends of the heat conducting channel 50 are not discharged soon, the heat protection structure 100 may be deformed, and the effect of heat dissipation and temperature reduction may be inferior to the heat protection structure 100 of the first embodiment.

Referring to fig. 14 and 15, fig. 14 is a schematic structural view of a third battery module disclosed in an embodiment of the present application, and fig. 15 is a schematic exploded structural view of the battery module shown in fig. 14. The top cover plate of the present embodiment is different from the top cover plates of the above two embodiments in that the top plate assembly 11 of the present embodiment is not provided with the plurality of honeycomb holes 13, and the top plate assembly 11 is not covered above the top cover bottom plate 30, that is, the top of the top cover bottom plate 30 is not covered.

Referring to fig. 16, fig. 16 is a schematic front view of a third thermal protection structure according to an embodiment of the disclosure. In an exemplary embodiment, the top plate assembly 11 includes a first top plate 14 and a second top plate 15, that is, the top plate assembly 11 has a rectangular plate-shaped structure, a portion of which is cut away at a position corresponding to the upper cover bottom plate 30, so that the first top plate 14 and the second top plate 15 having the same structure and size are formed, and the first top plate 14 and the second top plate 15 have a predetermined interval therebetween. The first top plate 14 and the second top plate 15 may be rectangular plate-shaped structures, and the connecting assembly 12 may be two rectangular plate-shaped structures having the same structure and size. The sides of the first top board 14 and the second top board 15 facing away from each other and opposite to each other intersect and are fixedly connected with the two connecting components 12.

In an exemplary embodiment, the sides of the first top board 14 and the second top board 15 facing away from each other and facing each other perpendicularly intersect with the two connecting assemblies 12, and the lengths of the first top board 14 and the second top board 15 are the same as the length of the connecting assemblies 12 fixedly connected. The connecting assembly 12 extends in a direction toward the battery cell 400, and a side of the connecting assembly 12 facing away from the battery cell 400 is flush with a surface of the first top plate 14 facing away from the battery cell 400.

In an exemplary embodiment, the upper cover side plate 20 includes a first side plate 21 and a second side plate 22, both the first side plate 21 and the second side plate 22 may be elongated prism structures, one end of the first side plate 21 is connected to a side of the first side plate 14 facing the battery cell 400, and one end of the second side plate 22 is connected to a side of the second side plate facing the battery cell 400.

In an exemplary embodiment, the first side plate 21 and the second side plate 22 may be rectangular parallelepiped structures with the same size. The first side plate 21 and the second side plate 22 are respectively parallel to the connecting assembly 12 and consistent with the length of the connecting assembly 12, the side surface of the first top plate 14 close to the second top plate 15 is perpendicularly intersected with the first side plate 21 and fixedly connected with the first top plate, and the side surface of the second top plate 15 close to the first top plate 14 is perpendicularly intersected with the second side plate 22 and fixedly connected with the second top plate. The first side plate 21 and the second side plate 22 extend toward the battery cell 400, a face of the first side plate 21 facing away from the battery cell 400 is flush with a face of the first top plate 14 facing away from the battery cell 400, and a face of the second side plate 22 facing away from the battery cell 400 is flush with a face of the second top plate 15 facing away from the battery cell 400.

In an exemplary embodiment, the upper cover bottom plate 30 may be a rectangular plate-shaped structure, parallel to the first top plate 14 and the second top plate 15 and located between the first side plate 21 and the second side plate 22, and perpendicularly intersecting and fixedly connected to the first side plate 21 and the second side plate 22, that is, the width of the upper cover bottom plate 30 is the same as the predetermined distance, and the upper side of the upper cover bottom plate 30 is not covered by the first top plate 14 and the second top plate 15, that is, the upper side of the upper cover bottom plate 30 is not covered by the upper cover bottom plate 30. The faces of the upper cover bottom plate 30 facing the battery cells 400 are flush with the faces of the first side plate 21 facing the battery cells 400 and the faces of the second side plate 22 facing the battery cells 400, respectively. The first side plate 21, the second side plate 22, the upper cover bottom plate 30 and the battery pack upper cover 1200 form the heat conducting channel 50.

Specifically, when a certain electrical core 400 is out of thermal runaway, high-temperature and high-pressure gas ejected from the explosion-proof valve 410 enters the heat conducting channel 50 through the air inlet hole 31, and then is discharged through the two opposite ends of the heat conducting channel 50. Since the first side plate 21, the second side plate 22, the upper cover bottom plate 30 and the battery pack upper cover 1200 form the heat conducting path 50, the high-temperature and high-pressure gas ejected from the explosion-proof valve 410 is directly ejected onto the battery pack upper cover 1200, and the temperature of the battery pack upper cover 1200 is rapidly increased. Further, since the honeycomb holes 13 are not provided, if the high-temperature and high-pressure gas discharged from the explosion-proof valve 410 is too large, the pressure in the heat transfer duct 50 may be rapidly increased, and if the both ends of the heat transfer duct 50 are not discharged soon, the battery pack upper cover 1200 may be deformed, and the heat radiation and temperature reduction effects may be inferior to those of the heat protection structure 100 of the first embodiment.

To sum up, the upper cover top plate 10 of the thermal protection structure 100 of this application includes the top plate subassembly 11 with coupling assembling 12, the top plate subassembly 11 coupling assembling 12, two end plates 210 and two curb plates 230 form the enclosure space, the top plate subassembly 11 with the upper cover curb plate 20 with the upper cover bottom plate 30 forms heat conduction channel 50, be equipped with a plurality ofly on the top plate subassembly 11 honeycomb holes 13, be equipped with a plurality ofly on the upper cover bottom plate 30 intake 31. When a certain battery cell 400 is out of thermal runaway, high-temperature and high-pressure gas is sprayed out of the explosion-proof valve 410 of the battery cell 400, enters the heat conduction channel 50 through the air inlet holes 31, and is discharged from the two opposite ends of the heat conduction channel 50 and the plurality of honeycomb holes 13, so that the phenomena of high temperature, deformation and the like of the heat protection structure 100 caused by the high-temperature and high-pressure gas are avoided, and the battery module is ensured to work healthily and safely.

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 implicit ly indicating a number of technical features being indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like means 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 application. In this specification, schematic representations of the above terms do not necessarily 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.

It should be understood that the application of the present application is not limited to the above examples, and that modifications or changes may be made by those skilled in the art based on the above description, and all such modifications and changes are intended to fall within the scope of the appended claims. It will be understood by those skilled in the art that all or part of the above-described embodiments may be implemented and equivalents may be made thereto without departing from the scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a hot protective structure for battery module heat dissipation, its characterized in that, hot protective structure includes the upper cover roof, the upper cover roof cover is located on a plurality of electric cores of battery module, the upper cover roof has the heat conduction passageway, a plurality of inlet ports have been seted up to the heat conduction passageway, and is a plurality of the inlet port with heat conduction passageway intercommunication and with a plurality of the explosion-proof valve position of electric core is corresponding, the inlet port is used for will following a plurality of the explosion-proof valve combustion gas of electric core is leading-in the heat conduction passageway, and along the relative both ends of heat conduction passageway extending direction are discharged.

2. The thermal protection structure of claim 1, further comprising: the battery cover comprises an upper cover side plate and an upper cover bottom plate, wherein the upper cover side plate is connected to one side, facing towards the battery core, of the upper cover top plate, the upper cover bottom plate is connected with one end, facing away from the upper cover side plate, of the upper cover top plate, the upper cover side plate and the upper cover bottom plate form a heat conduction channel with the upper cover top plate, and a plurality of air inlets corresponding to the explosion-proof valves are formed in the upper cover bottom plate.

3. The thermal protection structure of claim 2, wherein said top cover plate comprises a top plate assembly and two connecting assemblies, said two connecting assemblies are respectively and fixedly connected with the side surface of said top plate assembly, said top plate assembly is provided with a plurality of honeycomb holes at the position corresponding to said heat conducting channel, and each of said honeycomb holes is communicated with said heat conducting channel.

4. The thermal protection structure of claim 3, wherein the top cover side plate comprises a first side plate and a second side plate, one end of each of the first side plate and the second side plate is connected to one side of the top plate assembly facing the battery cell, the top cover bottom plate is connected to one end of the first side plate and the second side plate facing away from the top plate assembly, and the top cover bottom plate, the first side plate, the second side plate and the top plate assembly enclose the heat conducting channel.

5. The thermal protection structure of any one of claims 2 to 4, wherein a plurality of air inlet holes are distributed along the length direction of the upper cover bottom plate, and the distribution positions of the air inlet holes are aligned with the positions of the explosion-proof valves of the battery cells.

6. A battery module comprising the thermal protection structure according to any one of claims 1 to 5.

7. The battery module according to claim 6, wherein the battery module further comprises a module box body, the module box body comprises two oppositely arranged end plates and two oppositely arranged side plates, the two end plates and the two side plates are sequentially connected end to form the module box body, the plurality of battery cells are arranged in the module box body, the upper cover top plate comprises a top plate assembly and two connecting assemblies fixedly connected with two sides of the top plate assembly respectively, the two connecting assemblies are fixedly connected with the two side plates respectively, the thermal protection structure further comprises an upper cover bottom plate, mounting holes are formed in two opposite ends of the upper cover bottom plate respectively, and the upper cover bottom plate and the two end plates are fixedly connected through the assembly of a fixing member and the mounting holes.

8. The battery module of claim 6, further comprising an insulating support and a connecting sheet, wherein the insulating support is located between the thermal protection structure and the battery cores, the insulating support is used for insulating the plurality of battery cores from the outside, the connecting sheet is embedded in the insulating support and realizes electrical connection between the plurality of battery cores, a plurality of air outlets corresponding to the plurality of air inlets in a one-to-one manner are formed in the insulating support, and the plurality of air outlets are communicated with the plurality of air inlets and the heat conduction channel.

9. A power battery pack, characterized by comprising a plurality of battery modules according to any one of claims 6-8.

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

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