CN218300119U - Shell structure of battery module, battery module and battery pack - Google Patents

Abstract

The utility model provides a shell structure of a battery module, the battery module and a battery pack, wherein the shell structure comprises an opening and closing assembly and a shell for packaging an electric core, the shell is provided with an air hole, the air hole is communicated with the inside and the outside of the shell, the opening and closing assembly is arranged corresponding to the air hole and can move relative to the air hole for opening or closing the air hole; be provided with limit structure in the gas pocket, limit structure and casing integrated into one piece, limit structure be used for with open and close the subassembly cooperation, open and close the moving position of subassembly for the gas pocket through the restriction, make open and close the subassembly and can open or seal the gas pocket. The utility model provides a shell structure, battery module and battery package of battery module can reduce battery package internal thermal runaway's battery module on the one hand and cause the possibility that other battery modules thermal runaway perhaps were lighted to can improve the thermal runaway protective capacities of battery module, on the other hand can also reduce the possibility that the foreign matter got into in the battery module, thereby can improve the protection level of battery module.

Description

Shell structure of battery module, battery module and battery pack

Technical Field

The utility model relates to a battery technology field specifically, relates to a shell structure, battery module and battery package of battery module.

Background

The Battery module is the structure that will go together a plurality of electric core encapsulation of series-parallel connection through the module shell, and the Battery package is the structure that the Battery Management System (abbreviated as BMS) and the thermal Management System encapsulation of a plurality of Battery module and control a plurality of Battery module are together through the Battery package shell.

After the battery takes place thermal runaway, the temperature in the battery module can sharply rise, leads to the gas expansion in the battery module to battery itself also can produce a large amount of gas, if these gases can't in time discharge, can lead to battery module explosion and electric core to become invalid, causes the condition of electric automobile fire spontaneous combustion for example. In the related art, the gas in the battery module can be discharged through the opening by forming the opening in the module case.

However, the protection level of the battery module is lowered due to the holes formed in the module housing, foreign matters easily enter the battery module through the holes, and high-temperature gas or flame generated by the battery module easily enters other battery modules in the battery pack through the holes after the battery module is thermally out of control, so that the other battery modules are thermally out of control or ignited.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least, provide a shell structure, battery module and the battery package of battery module, can reduce battery package internal thermal runaway's battery module on the one hand and cause other battery module thermal runaway or the possibility of being ignited to can improve battery module's thermal runaway protective capacities, on the other hand can also reduce the possibility that the foreign matter got into in the battery module, thereby can improve battery module's protection level.

The shell structure of the battery module comprises a shell for packaging an electric core, wherein the shell is provided with an air hole, the air hole is communicated with the inside and the outside of the shell, and the shell structure further comprises an opening and closing assembly which is arranged corresponding to the air hole, can move relative to the air hole and is used for opening or closing the air hole;

the air hole is internally provided with a limiting structure, the limiting structure and the shell are integrally formed, the limiting structure is used for being matched with the opening and closing assembly, and the opening and closing assembly can open or close the air hole by limiting the moving position of the opening and closing assembly relative to the air hole.

Optionally, the opening and closing assembly is disposed in the air hole and can move towards the inside and the outside of the shell under the influence of the difference between the inside pressure and the outside pressure of the shell, and the limiting structure is used for being matched with the opening and closing assembly to limit the position of the opening and closing assembly moving towards the inside and the outside of the shell.

Optionally, the opening and closing assembly includes a sealing element, a connecting element, an elastic element and a limiting element, wherein the connecting element is inserted into the air hole, the sealing element is disposed at one end of the connecting element, and is close to the outer side of the housing relative to the limiting structure, and is configured to abut against the limiting structure to close the air hole and limit the position of the opening and closing assembly moving towards the housing;

the limiting part is arranged at the other end of the connecting part, is close to the inner side of the shell relative to the limiting structure, and is used for abutting against the limiting structure to limit the position of the opening and closing assembly moving towards the outside of the shell;

the elastic piece is arranged between the limiting structure and the limiting piece, and can stretch out and draw back under the influence of the internal and external pressure difference of the shell, so that the opening and closing assembly moves towards the inside and the outside of the shell.

Optionally, the limiting structure includes an annular portion and a connecting portion, the annular portion is connected to the inner wall of the air hole through the connecting portion, the annular portion is used for the connecting piece to pass through, and can abut against the closing piece and the limiting piece to limit the position of the opening and closing assembly moving towards the shell, and the elastic piece is arranged between the annular portion and the limiting piece.

Optionally, the number of the connecting portions is multiple, the connecting portions are arranged at intervals along the circumferential direction of the annular portion, and the annular portion is connected with the inner wall of the air hole through the connecting portions.

Optionally, a radial dimension of the limiting member is greater than or equal to a radial dimension of the annular portion.

Optionally, the shell and the limiting structure are made of aluminum profiles, and the shell and the limiting structure are integrally formed through aluminum profile extrusion.

Optionally, the housing includes a top plate, a bottom plate, two side plates and two end plates, wherein the top plate is disposed opposite to the bottom plate, the two side plates are disposed opposite to each other, each of the side plates is respectively connected to the top plate and the bottom plate, the two end plates are disposed opposite to each other, and each of the end plates is respectively connected to the top plate, the bottom plate and the two side plates;

at least one of the top plate, the bottom plate, the two side plates and the two end plates is provided with at least one air hole, the air hole is correspondingly provided with the opening and closing assembly, and the limiting structure is integrally formed in the air hole.

The utility model also provides a battery module, including electric core and if the utility model provides a shell structure, the electricity core encapsulation is in the shell structure.

The utility model also provides a battery pack, include if the utility model provides a battery module.

The utility model discloses following beneficial effect has:

the utility model provides a shell structure of battery module, through corresponding the setting with the gas pocket and open and close the subassembly, and set up the limit structure with casing integrated into one piece in the gas pocket, because open and close the subassembly and can remove for the gas pocket subassembly, limit structure can with open and close the subassembly cooperation, open and close the mobile position of subassembly for the gas pocket through the restriction, make and open and close the subassembly and can open or seal the gas pocket, when battery module need not to exhaust like this, remove for the gas pocket and seal the gas pocket through opening and close the subassembly, can reduce on the one hand high-temperature gas or the flame that battery module out of control produced and enter into in the other battery module in the battery package, cause the possibility that other battery module out of control or were lighted, and then can improve battery module's thermal runaway protective capacities, on the other hand can also make the foreign matter outside the battery module be difficult to enter into in the battery module through the gas pocket, thereby can reduce the possibility that the foreign matter enters into the battery module, and then can improve battery module's protection level.

The utility model provides a battery module encapsulates the electricity core in the shell structure provided by the utility model, can reduce battery pack thermal runaway's battery module on the one hand and cause other battery module thermal runaway or the possibility of being ignited to can improve the thermal runaway protective capacities of battery module, on the other hand can also reduce the possibility that the foreign matter got into in the battery module, thereby can improve the protection level of battery module.

The utility model provides a battery pack with the help of the utility model provides a battery module can reduce battery pack thermal runaway's battery module on the one hand and cause other battery module thermal runaway or the possibility of being ignited to can improve battery module's thermal runaway protective capacities, on the other hand can also reduce the possibility that the foreign matter got into in the battery module, thereby can improve battery module's protection level.

Drawings

Fig. 1 is a schematic structural diagram of a battery module and a housing structure thereof according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a battery module and a housing structure thereof according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an outer side of an end plate of a housing structure of a battery module according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an inner side of an end plate of a housing structure of a battery module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a top plate of a housing structure of a battery module according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a bottom plate and two side plates of a housing structure of a battery module according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an opening and closing assembly for closing an air hole of a housing structure of a battery module according to an embodiment of the present invention;

fig. 8 is a schematic structural view of an opening/closing assembly opening air hole of a housing structure of a battery module according to an embodiment of the present invention;

description of the reference numerals:

100-a battery module; 110-a housing; 111-top plate; 112-a bottom plate; 113-side plate; 114-an end plate; 120-opening and closing components; 121-a closure; 122-a connector; 123-an elastic member; 124-a stopper; 130-pores; 140-a limit structure; 141-an annular portion; 142-a connecting portion; 150-plastic partition board; 200-electric core stack.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the housing structure of the battery module, the battery module and the battery pack in detail with reference to the attached drawings.

As shown in fig. 1-8, an embodiment of the present invention provides a housing structure of a battery module 100, including an opening and closing assembly 120 and a casing 110 for packaging an electrical core, where the casing 110 is provided with an air hole 130, the air hole 130 is communicated with the inside and the outside of the casing 110, the opening and closing assembly 120 is arranged corresponding to the air hole 130, and can move relative to the air hole 130 to open or close the air hole 130; the air hole 130 is internally provided with a limiting structure 140, the limiting structure 140 and the shell 110 are integrally formed, the limiting structure 140 is used for being matched with the opening and closing assembly 120, and the opening and closing assembly 120 can open or close the air hole 130 by limiting the moving position of the opening and closing assembly 120 relative to the air hole 130.

The embodiment of the utility model provides a battery module 100's shell structure, through opening and close subassembly 120 with gas pocket 130 corresponds the setting, and set up the limit structure 140 with casing 110 integrated into one piece in gas pocket 130, because it can remove for gas pocket 130 subassembly to open and close subassembly 120, limit structure 140 can with open and close subassembly 120 cooperation, open and close subassembly 120 through the restriction and for the shift position of gas pocket 130, make and open and close subassembly 120 and can open or seal gas pocket 130, when battery module 100 need not to exhaust like this, through opening and close subassembly 120 for gas pocket 130 removal closed gas pocket 130, can reduce high-temperature gas or the flame that battery module 100 out of control of heat produced and enter into other battery modules 100 in the battery package on the one hand, cause the possibility that other battery modules 100 thermal runaway perhaps were lighted, and then can improve battery module 100's thermal runaway protective capability, on the other hand can also make the outer foreign matter of battery module 100 be difficult to enter into in battery module 100 through gas pocket 130, thereby can reduce the possibility that the foreign matter enters into in battery module 100, and then can improve battery module 100's protection level.

In addition, the limiting structure 140 and the shell 110 are integrally formed, so that the limiting structure 140 and the shell 110 can be prepared in one step, and then the air hole 130 is arranged at the position corresponding to the limiting structure 140, so that the limiting structure 140 can be positioned in the air hole 130, compared with the prior art, the air hole 130 is not required to be arranged on the shell 110 after the shell 110 is prepared, and then the limiting structure is prepared in the air hole 130, so that the preparation process of the shell structure can be simplified.

For example, in practical applications, after the thermal runaway of the battery module 100 occurs, a large amount of gas may be generated in the housing 110 of the battery module 100, and the gas may rapidly expand due to the rapid rise of the temperature of the battery module 100, at this time, the battery module 100 needs to exhaust, the opening and closing assembly 120 may move relative to the air hole 130 to open the air hole 130 in cooperation with the limiting structure 140, so that the gas generated due to the thermal runaway of the battery module 100 in the housing 110 can be exhausted out of the housing 110 through the air hole 130, and thus, the explosion and the failure of the battery core of the battery module 100 due to the failure of the timely exhaust of the gas in the housing 110 can be avoided.

When the battery module 100 is in thermal runaway but the gas in the housing 110 is exhausted out of the housing 110 through the gas hole 130, at this time, the battery module 100 does not need to exhaust, and the opening and closing assembly 120 can move relative to the gas hole 130 to cooperate with the limiting structure 140 to close the gas hole 130, so that on one hand, the possibility that high-temperature gas or flame generated by the battery module 100 in thermal runaway in the battery pack enters the housing 110 of the battery module 100 after the gas is exhausted through the gas hole 130 to cause the battery module 100 after the gas is exhausted to be in thermal runaway again or be ignited can be reduced, the possibility that other battery modules 100 in the battery pack are in thermal runaway to cause the thermal runaway or be ignited can be reduced, and further, the thermal runaway protection capability of the battery module 100 can be improved, on the other hand, foreign matters outside the housing 110 are difficult to enter the housing 110 through the gas hole 130 to reduce the possibility that the foreign matters enter the battery module 100, and further, the grade of the battery module 100 can be improved.

When the battery module 100 is not in thermal runaway, at this time, the battery module 100 does not need to exhaust, the opening and closing assembly 120 can be located at the position for closing the air hole 130, so that on one hand, the possibility that high-temperature gas or flame generated by the battery module 100 in thermal runaway in the battery pack enters the shell 110 of the battery module 100 in thermal runaway through the air hole 130 to cause the battery module 100 in thermal runaway to be in thermal runaway or ignited can be reduced, the possibility that the battery module 100 in thermal runaway in the battery pack causes the other battery modules 100 to be in thermal runaway or ignited can be reduced, the thermal runaway protection capability of the battery module 100 can be improved, on the other hand, foreign matters outside the shell 110 can be difficult to enter the shell 110 through the air hole 130, the possibility that the foreign matters enter the battery module 100 can be reduced, and the protection level of the battery module 100 can be improved.

As shown in fig. 7, in an embodiment of the present invention, the opening and closing component 120 may be disposed in the air hole 130, and can move toward the inside and the outside of the casing 110 under the influence of the internal and external pressure difference of the casing 110, and the limiting structure 140 is used for cooperating with the opening and closing component 120 to limit the position of the opening and closing component 120 moving toward the inside and the outside of the casing 110.

That is, in an embodiment of the present invention, the opening and closing assembly 120 may move toward the inside and the outside of the housing 110 with respect to the air hole 130 under the influence of the difference between the inside and the outside of the housing 110. For example, in practical applications, when the thermal runaway of the battery module 100 does not occur, the air pressure inside and outside the housing 110 may be the same, the pressure difference inside and outside the housing 110 may be zero, and the opening and closing assembly 120 is not moved to the position for closing the air hole 130. When the battery module 100 is out of control due to thermal runaway, a large amount of gas is generated in the housing 110 and rapidly expands, at this time, the pressure in the housing 110 increases, the pressure difference between the inside and the outside of the housing 110 increases, and at this time, the pressure in the housing 110 pushes the opening and closing assembly 120 to move toward the outside of the housing 110, so that the opening and closing assembly 120 can move toward the outside of the housing 110 relative to the air hole 130 to open the air hole 130. In the process that the gas in the casing 110 is gradually discharged out of the casing 110 through the gas hole 130, the gas pressure of the casing 110 is gradually reduced, the internal and external pressure difference of the casing 110 is gradually reduced, at this time, the opening and closing assembly 120 can gradually move towards the inside of the casing 110 relative to the gas hole 130, when the gas pressure in the casing 110 is gradually reduced to be the same as the gas pressure outside the casing 110, and the internal and external pressure difference of the casing 110 is gradually reduced to zero, the opening and closing assembly 120 can gradually move towards the inside of the casing 110 relative to the gas hole 130 to the position where the gas hole 130 is closed when the thermal runaway of the battery module 100 does not occur.

Through limit structure 140 and the cooperation of opening and close subassembly 120, the position of subassembly 120 is opened and close to the inside and outside removal of casing 110 is opened and close in the restriction, on the one hand can avoid because the atmospheric pressure in the casing 110 is too big for the atmospheric pressure outside the casing 110, lead to opening and close subassembly 120 to move outside the gas pocket 130 towards the casing 110 for gas pocket 130, cause the condition of opening and close subassembly 120 and break away from gas pocket 130 to take place, on the other hand can be when the atmospheric pressure in the casing 110 reduces gradually to the atmospheric pressure outside with the casing 110, make to open and close subassembly 120 and can move gradually to the position that seals gas pocket 130 when battery module 100 does not take place the thermal runaway towards the casing 110 for gas pocket 130.

As shown in fig. 7 and 8, in an embodiment of the present invention, the opening and closing assembly 120 may include a sealing element 121, a connecting element 122, an elastic element 123 and a limiting element 124, wherein the connecting element 122 is disposed in the air hole 130 in a penetrating manner, the sealing element 121 is disposed at one end of the connecting element 122, is close to the outer side of the casing 110 relative to the limiting structure 140, and is used for abutting against the limiting structure 140 to close the air hole 130 and limiting a position of the opening and closing assembly 120 moving toward the casing 110; the limiting member 124 is arranged at the other end of the connecting member 122, is close to the inner side of the casing 110 relative to the limiting structure 140, and is used for abutting against the limiting structure 140 and limiting the position of the opening and closing assembly 120 moving towards the outside of the casing 110; the elastic member 123 is disposed between the limiting structure 140 and the limiting member 124, and the elastic member 123 can extend and contract under the influence of the difference between the internal pressure and the external pressure of the casing 110, so that the opening and closing assembly 120 moves toward the inside and the outside of the casing 110.

As shown in fig. 7 and 8, in practical applications, when the gas pressure inside the housing 110 is greater than the gas pressure outside the housing 110, the gas pressure inside the housing 110 can push the sealing element 121 to move toward the outside of the housing 110, so that the sealing element 121 no longer seals the gas hole 130, thereby opening the gas hole 130, during the process that the sealing element 121 moves toward the outside of the housing 110, the connecting element 122 and the limiting element 124 move toward the outside of the housing 110 along with the sealing element 121, the elastic element 123 between the limiting element 124 and the limiting structure 140 is compressed, when the limiting element 124 moves toward the outside of the housing 110 to abut against the limiting structure 140, the limiting element 124 cannot move further, so that the connecting element 122 and the sealing element 121 cannot move further, thereby the position where the opening and closing assembly 120 moves toward the outside of the housing 110 is limited by the limiting structure 140 (as shown in fig. 8), and the arrow in fig. 8 indicates the flow direction of the gas inside the housing 110 discharging to the outside of the housing 110. When the air pressure in the housing 110 gradually decreases, the elastic element 123 gradually extends under the action of elastic force, so that the limiting element 124 gradually moves toward the housing 110, in the process that the limiting element 124 gradually moves toward the housing 110, the connecting element 122 and the closing element 121 move toward the housing 110 along with the limiting element 124, and when the closing element 121 moves toward the housing 110 to abut against the limiting structure 140, the closing element 121 closes the air hole 130, the closing element 121 cannot move continuously, so that the connecting element 122 and the limiting element 124 cannot move continuously, and the position of the opening and closing assembly 120 moving toward the housing 110 is limited by the limiting structure 140 (as shown in fig. 7).

Alternatively, the connecting member 122 may be a connecting rod.

Alternatively, the closure 121 may be a cover plate.

Alternatively, the closing member 121 may be provided with a threaded connection portion 142, one end of the connecting member 122 may be provided with a threaded hole, the threaded connection portion 142 may be capable of being threadedly engaged with the threaded hole, and the closing member 121 may be connected with one end of the connecting member 122 through the threaded connection portion 142 and the threaded hole.

Alternatively, the closure 121 may be circular. The shape of the closure 121 may be adjusted according to the shape of the air hole 130.

Alternatively, the axis of the connecting member 122 may be coaxial with the axis of the air hole 130.

Alternatively, the retaining member 124 may be annular and disposed around the other end of the connecting member 122.

Alternatively, the elastic member 123 may be connected to the limiting member 124.

Optionally, the elastic member 123 may be a compression spring, and the compression spring may be sleeved outside the connecting member 122. One end of the compression spring may be connected to the limiting member 124, and the other end may be abutted against the limiting structure 140.

Alternatively, the number of the elastic members 123 may be plural, and a plurality of the elastic members 123 may be wound around the connecting member 122. One end of each elastic element 123 may be connected to the limiting element 124, and the other end may be abutted to the limiting structure 140.

Alternatively, the pressure at which the closing member 121 opens the air hole 130 may be adjusted by the elastic member 123, and the pressure may be 5kpa to 10kpa.

As shown in fig. 2, in an embodiment of the present invention, the limiting structure 140 may include a ring-shaped portion 141 and a connecting portion 142, the ring-shaped portion 141 is connected to the inner wall of the air hole 130 through the connecting portion 142, the ring-shaped portion 141 is for the connecting member 122 to pass through and can abut against the sealing member 121 and the limiting member 124, so as to limit the position of the opening/closing assembly 120 moving towards the casing 110, and an elastic member 123 is disposed between the ring-shaped portion 141 and the limiting member 124.

In practical applications, when the limiting member 124 moves with the closing member 121 toward the outside of the housing 110, the side of the annular portion 141 facing the inside of the housing 110 can abut against the limiting member 124, so that the closing member 121 cannot move further, and the opening and closing assembly 120 is limited from moving further toward the outside of the housing 110. When the sealing element 121 moves towards the housing 110 along with the limiting element 124, the side of the annular portion 141 facing the outside of the housing 110 can abut against the sealing element 121, so that the limiting element 124 cannot move further, and the opening and closing assembly 120 is limited from moving further towards the housing 110.

Alternatively, the ring portion 141 may have a circular ring shape.

Alternatively, the axis of the ring portion 141 may be coaxial with the axis of the air hole 130.

Alternatively, the connecting portion 142 may have a rod shape.

As shown in fig. 2, in an embodiment of the present invention, the number of the connection portions 142 may be multiple, the connection portions 142 may be disposed at intervals along the circumference of the annular portion 141, and the annular portion 141 is connected to the inner wall of the air hole 130 through the connection portions 142.

This can improve the stability of the annular portion 141, and in practical use, the gas in the casing 110 can be discharged to the outside of the casing 110 through the gap between the two adjacent connecting portions 142.

In an embodiment of the present invention, an orthographic projection of the closing member 121 on the air hole 130 may coincide with a cross section of the air hole 130.

The closing member 121 can enter the air hole 130, and can close the air hole 130 and abut against the stopper 140. However, the orthographic projection of the sealing element 121 on the air hole 130 is not limited to coincide with the cross section of the air hole 130, for example, the orthographic projection of the sealing element 121 on the air hole 130 may be larger than the cross section of the air hole 130, so that the sealing element 121 can cover the outer surface of the housing 110 and seal the air hole 130.

In an embodiment of the present invention, the radial dimension of the limiting member 124 may be greater than or equal to the radial dimension of the annular portion 141. This allows the stopper 124 to abut against the annular portion 141.

In an embodiment of the present invention, the material of the housing 110 and the limiting structure 140 may include aluminum profiles, and the housing 110 and the limiting structure 140 are integrally formed by extruding the aluminum profiles.

That is to say, the shell 110 and the position-limiting structure 140 are made of the same material and are made of aluminum profiles, and in practical applications, the integrated aluminum profiles can be extruded to form the integrated shell 110 and the position-limiting structure 140 at the same time, so that the shell 110 and the position-limiting structure 140 are integrally formed.

As shown in fig. 1-6, in an embodiment of the present invention, the housing 110 may include a top plate 111, a bottom plate 112, two side plates 113 and two end plates 114, wherein the top plate 111 is disposed opposite to the bottom plate 112, the two side plates 113 are disposed opposite to each other, each side plate 113 is respectively connected to the top plate 111 and the bottom plate 112, the two end plates 114 are disposed opposite to each other, and each end plate 114 is respectively connected to the top plate 111, the bottom plate 112 and the two side plates 113; at least one of the top plate 111, the bottom plate 112, the two side plates 113 and the two end plates 114 is provided with at least one air hole 130, the air hole 130 is correspondingly provided with an opening and closing assembly 120, and an integrally formed limiting structure 140 is arranged in the air hole 130.

The top plate 111, the bottom plate 112, the two side plates 113, and the two end plates 114 may form a housing 110 in which the cells are enclosed. As shown in fig. 1 to 6, a plurality of air holes 130 may be disposed on the top plate 111, the bottom plate 112, each side plate 113 and each end plate 114, so as to improve the exhaust efficiency of the battery module 100, thereby further avoiding explosion and failure of the battery cell of the battery module 100 caused by the fact that gas in the housing 110 cannot be timely exhausted, the number of the opening and closing assemblies 120 may be the same as the number of the air holes 130, and the plurality of the opening and closing assemblies 120 may be disposed in one-to-one correspondence with the plurality of the air holes 130, and may move relative to the corresponding air holes 130, so as to open or close the corresponding air holes 130. However, the number of the air holes 130 is not limited to this, and for example, only one air hole 130 may be provided in the case 110, that is, only one air hole 130 may be provided in one of the top plate 111, the bottom plate 112, the two side plates 113, and the two end plates 114, and the air in the case 110 may be exhausted through the one air hole 130.

As shown in fig. 1-4 and fig. 7 and 8, the two end plates 114 may be formed by extrusion molding of aluminum, so that the position-limiting structure 140 in the air hole 130 of each end plate 114 may be integrally formed with the end plate 114 by extrusion molding of aluminum, that is, the position-limiting structure 140 in the air hole 130 of one end plate 114 may be integrally formed with the one end plate 114, and the position-limiting structure 140 in the air hole 130 of the other end plate 114 may be integrally formed with the other end plate 114.

Alternatively, the two side plates 113 may form a U shape with the top plate 111 or the bottom plate 112 as an integral structure.

As shown in fig. 1 and fig. 2, the embodiment of the present invention further provides a battery module 100, which includes an electrical core and a housing structure provided by the embodiment of the present invention, wherein the electrical core is encapsulated in the housing structure.

The embodiment of the utility model provides a battery module 100, with the electricity core encapsulation in the shell structure that the embodiment of the utility model provides an in can reducing battery package thermal runaway's battery module 100 and cause other battery module 100 thermal runaway or the possibility of being ignited to can improve battery module 100's thermal runaway protective capacities, on the other hand can also reduce the possibility that the foreign matter got into in the battery module 100, thereby can improve battery module 100's protection level.

As shown in fig. 2, optionally, the number of the battery cells may be multiple, and multiple battery cells may be connected in series and in parallel to form a battery cell stack 200.

As shown in fig. 2, optionally, the battery module 100 may further include two plastic separators 150, and the two plastic separators 150 are respectively disposed between the two end plates 114 and the cell stack 200.

The embodiment of the utility model provides a still provide a battery package, include like the embodiment of the utility model provides a battery module 100.

The embodiment of the utility model provides a battery pack, with the help of the utility model provides a battery module 100, battery module 100 that on the one hand can reduce the battery pack in thermal runaway causes other battery modules 100 thermal runaway or the possibility of being ignited to can improve battery module 100's thermal runaway protective capacities, on the other hand can also reduce the possibility that the foreign matter got into in battery module 100, thereby can improve battery module 100's protection level.

Alternatively, the number of the battery modules 100 may be plural.

Optionally, the battery pack may further include a battery management system and a thermal management system, the battery management system may be electrically connected to the plurality of battery modules 100 to manage the plurality of battery modules 100, the thermal management system may be electrically connected to the plurality of battery modules 100 to manage the plurality of battery modules 100, and the battery management system, the thermal management system, and the plurality of battery modules 100 may be packaged in the housing 110 of the battery pack.

To sum up, the embodiment of the utility model provides a battery module 100's shell structure, battery module 100 and battery package can reduce battery package internal thermal runaway's battery module 100 on the one hand and cause other battery modules 100 thermal runaway or the possibility of being ignited to can improve battery module 100's thermal runaway protective capacities, on the other hand can also reduce the possibility that the foreign matter got into in the battery module 100, thereby can improve battery module 100's protection level.

It is to be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention, and such changes and modifications are to be considered as within the scope of the invention.

Claims (10)

1. The shell structure of the battery module comprises a shell for packaging a battery core, wherein the shell is provided with an air hole, and the air hole is communicated with the inside and the outside of the shell;

the air hole is internally provided with a limiting structure, the limiting structure and the shell are integrally formed, the limiting structure is used for being matched with the opening and closing assembly, and the opening and closing assembly can open or close the air hole by limiting the moving position of the opening and closing assembly relative to the air hole.

2. The enclosure structure of claim 1, wherein the opening and closing assembly is disposed in the air hole and is capable of moving toward the inside and the outside of the housing under the influence of the difference between the inside and the outside of the housing, and the limiting structure is configured to cooperate with the opening and closing assembly to limit the position of the opening and closing assembly moving toward the inside and the outside of the housing.

3. The shell structure according to claim 2, wherein the opening and closing assembly comprises a closing member, a connecting member, an elastic member and a limiting member, wherein the connecting member is inserted into the air hole, the closing member is disposed at one end of the connecting member, is close to the outer side of the shell relative to the limiting structure, and is used for abutting against the limiting structure to close the air hole and limiting the position of the opening and closing assembly moving towards the shell;

the limiting piece is arranged at the other end of the connecting piece, is close to the inner side of the shell relative to the limiting structure, and is used for abutting against the limiting structure to limit the position of the opening and closing assembly moving towards the outside of the shell;

the elastic piece is arranged between the limiting structure and the limiting piece, and can stretch out and draw back under the influence of the internal and external pressure difference of the shell, so that the opening and closing assembly moves towards the inside and the outside of the shell.

4. The housing structure according to claim 3, wherein the limiting structure includes a ring portion and a connecting portion, the ring portion is connected to the inner wall of the air hole through the connecting portion, the ring portion is provided for the connecting member to pass through and can abut against the closing member and the limiting member to limit a position of the opening/closing assembly moving toward the housing, and the elastic member is disposed between the ring portion and the limiting member.

5. The housing structure according to claim 4, wherein the number of the connecting portions is plural, the plural connecting portions are arranged at intervals in a circumferential direction of the annular portion, and the annular portion is connected to an inner wall of the air hole through the plural connecting portions.

6. The housing structure according to claim 4, characterized in that the radial dimension of the retainer is greater than or equal to the radial dimension of the annular portion.

7. The shell structure of claim 1, wherein the shell and the limiting structure are made of aluminum profiles, and the shell and the limiting structure are integrally formed by extruding the aluminum profiles.

8. The containment structure of claim 1 wherein the shell includes a top panel, a bottom panel, two side panels and two end panels, wherein the top panel is disposed opposite the bottom panel and the two side panels are disposed opposite each other, each of the side panels being connected to the top panel and the bottom panel, respectively, and the two end panels are disposed opposite each other, each of the end panels being connected to the top panel, the bottom panel and the two side panels, respectively;

at least one of the top plate, the bottom plate, the two side plates and the two end plates is provided with at least one air hole, the air hole is correspondingly provided with the opening and closing assembly, and the limiting structure is integrally formed in the air hole.

9. A battery module comprising a cell and the housing structure of any of claims 1-8, the cell being enclosed within the housing structure.

10. A battery pack comprising the battery module according to claim 9.

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