CN219959218U - Battery pack and automobile - Google Patents

Abstract

The utility model provides a battery pack and an automobile, and relates to the technical field of energy storage devices. When a certain electric core is out of control, the inside high temperature flue gas that produces of electric core body overflows the back from the explosion-proof valve, can directly get into in the lateral wall cavity from the wall hole, and then discharge in the external environment, can not cause the potential safety hazard to other electric cores in the module or other electrical components in the battery package, moreover, the box can not explode because of internal pressure is too big, has improved the security performance of battery package.

Description

Battery pack and automobile

Technical Field

The utility model relates to the technical field of energy storage devices, in particular to a battery pack and an automobile.

Background

In recent years, the appearance of new energy automobiles plays a great role in promoting social development and environmental protection, and a power battery pack serving as a rechargeable battery is a power source of the new energy automobiles and is widely applied to the field of the new energy automobiles. The module in the existing battery pack comprises a plurality of stacked battery cells, if one battery cell is out of control, high-temperature smoke overflowed from an explosion-proof valve of the battery cell can cause potential safety hazards to other battery cells in the module or other electric elements in the battery pack, and if the failed battery cells are too many, the internal pressure of the battery pack shell can be large, and the battery pack shell is exploded due to the accommodation.

Disclosure of Invention

The utility model aims to solve the problem that the existing battery pack has a large potential safety hazard.

In order to solve the problems, the utility model provides a battery pack, which comprises a box body and a module, wherein the module is arranged in the box body, the module comprises a plurality of electric cores which are sequentially stacked along the horizontal direction, each electric core comprises an electric core body and an explosion-proof valve arranged on the electric core body, a side wall cavity is formed in the side wall of the box body, which is correspondingly arranged with the explosion-proof valve, and a wall hole communicated with the side wall cavity is formed in the side wall of the box body, which is correspondingly arranged with the explosion-proof valve, and the explosion-proof valve is used for being communicated with the corresponding wall hole, and the side wall cavity is communicated with the external space of the box body.

Compared with the prior art, the battery pack provided by the utility model has the following technical effects:

after the module is put into the box, the corresponding lateral wall of the explosion-proof valve of the battery cell in the box and the module is provided with a wall hole, the wall hole is communicated with a lateral wall cavity in the lateral wall where the wall hole is positioned, and the lateral wall cavity is communicated with the external space of the box.

Further, the battery cell further comprises a pole, the length of the battery cell body is greater than or equal to 200mm and smaller than 400mm, the two ends of the top of the battery cell body are respectively concaved downwards to form a concave part, the pole is arranged at the concave part, the top height of the pole is lower than that of the battery cell body, and the two ends of the length direction of the battery cell body are respectively provided with the explosion-proof valve.

Further, the box body comprises a box cover, a bottom wall, at least two mutually parallel transverse walls and at least two mutually parallel longitudinal walls, wherein the at least two mutually parallel transverse walls and the at least two mutually parallel longitudinal walls are arranged on the bottom wall, and the two adjacent transverse walls and the two adjacent longitudinal walls are enclosed to form a module space;

the inside of the longitudinal wall is provided with a longitudinal cavity, the inside of at least one transverse wall is provided with a transverse cavity, a plurality of longitudinal cavities are communicated through at least one transverse cavity to form an inner wall cavity, the inner wall cavity is communicated with the outer space of the box body, the longitudinal cavity is the side wall cavity, and the wall hole is formed in one side of the longitudinal wall, which faces towards the corresponding explosion-proof valve;

the module is used for being placed in the module space, the length direction of the battery core body is perpendicular to the longitudinal wall, and the box cover is used for being covered on the top of the module space.

Further, an insulating layer is arranged at the position of the box cover corresponding to the pole, and the box cover is used for being connected with the pole through the insulating layer and wrapping the pole.

Further, the module still includes sealed bubble cotton and smooth film, two sealed bubble cotton set up in electric core body length direction both ends, smooth film paste is located sealed bubble is cotton is last, smooth film with sealed bubble cotton be provided with respectively with the first hole structure that explosion-proof valve corresponds, vertical wall is close to corresponding one side subsides of explosion-proof valve are equipped with the adhesive linkage, the adhesive linkage be provided with the second hole structure that the wall hole corresponds, the module is used for passing through smooth film with the adhesive linkage is connected, wherein, works as sealed bubble cotton is in under the natural state, two distance between the smooth film is greater than the distance between two adjacent adhesive linkage.

Further, three longitudinal walls are respectively a first longitudinal wall, a third longitudinal wall and a second longitudinal wall which are sequentially arranged, three transverse walls are respectively a first transverse wall, a second transverse wall and a third transverse wall which are sequentially arranged, the first longitudinal wall is arranged at one end of the three transverse walls, the second longitudinal wall is arranged at the other end of the three transverse walls, one end of the third longitudinal wall is connected with the middle part of the second transverse wall, the other end of the third longitudinal wall is connected with the other end of the third transverse wall, wherein one module space is formed by enclosing among the third longitudinal wall, the first longitudinal wall, the second transverse wall and the third transverse wall, another module space is formed by enclosing among the third longitudinal wall, the second transverse wall and the third transverse wall, and other spaces are formed by enclosing among the first transverse wall, the second transverse wall, the first longitudinal wall and the second longitudinal wall, and are used for arranging at least one of a relay, a fuse and a battery management system.

Further, the battery pack further comprises a maintenance cover, wherein the maintenance cover is used for covering the top of the other space.

Further, a first cooling flow channel corresponding to the top of the battery cell body is arranged in the case cover, and a first liquid inlet and a first liquid outlet which are communicated with the first cooling flow channel are formed in the surface of the case cover; and/or, the inside of diapire is provided with the second cooling runner, the surface of diapire be provided with second inlet and the second liquid outlet of second cooling runner intercommunication, the diapire is provided with the second heat conduction glue film towards one side of case lid, the second heat conduction glue film be used for with the bottom of electric core body is connected.

Further, a first heat conducting glue layer is arranged at the position of the box cover corresponding to the top of the battery cell body, and the first heat conducting glue layer is used for being connected with the top of the battery cell body.

The utility model also provides an automobile comprising the battery pack.

Because the technical improvement and beneficial effects of the automobile are the same as those of the battery pack, the automobile is not repeated.

Drawings

Fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

fig. 2 is a schematic view of a battery pack according to an embodiment of the present utility model with a cover removed;

FIG. 3 is a schematic diagram of a cover of an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a battery cell according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of the case according to the embodiment of the present utility model with the case cover removed;

FIG. 6 is a schematic diagram of a module according to an embodiment of the utility model;

FIG. 7 is a cross-sectional view of FIG. 1;

FIG. 8 is an enlarged schematic view of FIG. 7 at A;

fig. 9 is a schematic view of a battery pack according to an embodiment of the present utility model with a maintenance cover removed.

Reference numerals illustrate:

1. a case; 11. a bottom wall; 12. a transverse wall; 121. a first transverse wall; 122. a second transverse wall; 123. a third transverse wall; 13. a longitudinal wall; 131. a first longitudinal wall; 132. a second longitudinal wall; 133. a third longitudinal wall; 14. wall holes; 15. an adhesive layer; 2. a module; 21. a battery cell; 211. a cell body; 2111. a recessed portion; 212. a pole; 213. an explosion-proof valve; 22. sealing foam; 23. a smooth film; 3. a case cover; 31. an insulating layer; 32. a first cooling flow passage; 331. a first liquid inlet; 332. a first liquid outlet; 34. a first heat conducting adhesive layer; 35. a second heat conducting adhesive layer; 4. and (5) maintaining the cover.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Moreover, in the drawings, the Z axis represents the vertical direction, that is, the up-down direction, and the positive direction of the Z axis represents the up direction, and the negative direction of the Z axis represents the down direction; the X-axis in the drawing indicates the longitudinal direction, i.e., the front-to-rear direction, and the positive direction of the X-axis indicates the front and the negative direction of the X-axis indicates the rear; the Y-axis in the drawing represents the lateral direction, i.e., the left-right direction, and the positive direction of the Y-axis represents the left and the negative direction of the Y-axis represents the right. It should also be noted that the foregoing Z-axis, X-axis, and Y-axis are meant to be illustrative only and to simplify the description of the present utility model, and are not meant to indicate or imply that the devices or elements referred to must be in a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Referring to fig. 2 and fig. 4-5, a battery pack according to an embodiment of the present utility model includes a case 1 and a module 2, the module 2 is disposed in the case 1, the module 2 includes a plurality of electric cores 21 stacked in sequence along a horizontal direction, the electric cores 21 include an electric core body 211 and an explosion-proof valve 213 disposed on the electric core body 211, a sidewall cavity is disposed inside a sidewall disposed corresponding to the explosion-proof valve 213 of the case 1, and a wall hole 14 communicating with the sidewall cavity is disposed on a sidewall disposed corresponding to the explosion-proof valve 213 of the case 1, and the explosion-proof valve 213 is configured to communicate with the corresponding wall hole 14, and the sidewall cavity communicates with an external space of the case 1.

In this embodiment, after the box is packed into to the module, the corresponding lateral wall of explosion-proof valve of box and electric core in the module owing to be provided with the wall hole, this wall hole is the intercommunication with the inside lateral wall cavity of its lateral wall, and the lateral wall cavity is again with the outside space intercommunication of box, so, when the electric core in the module takes place thermal runaway, the inside high temperature flue gas that produces of electric core body overflows the back from explosion-proof valve, can directly follow the wall hole and get into the lateral wall cavity, and then discharge to external environment in, can not cause the potential safety hazard to other electric cores in the module or other electrical components in the battery package, moreover, because the high temperature flue gas that produces when electric core thermal failure finally all discharges to external environment, the casing of battery package, that is the box can not explode because of internal pressure is too big, the security performance of battery package has been improved.

Referring to fig. 4, optionally, the battery cell 21 further includes a pole 212, the length of the battery cell body 211 is greater than or equal to 200mm and less than 400mm, two ends of the top of the battery cell body 211 are respectively concave downward to form a concave portion 2111, the pole 212 is disposed at the concave portion 2111, and the top height of the pole 212 is lower than the top height of the battery cell body 211, wherein the two ends of the length direction of the battery cell body 211 are respectively provided with the explosion-proof valve 213.

In this embodiment, when the battery pack is assembled, the module 2 may be regarded as a whole, the module 2 of this overall structure includes a plurality of electric cores 21 stacked in sequence along the horizontal direction (X-axis direction), in each electric core 21 of the module 2, the positive electrode and the negative electrode two poles 212 are respectively disposed at the concave portions 2111 at the two ends of the top of the electric core body 211, and the top height of the poles 212 is lower than the top height of the electric core body 211, further in the module 2, the top heights of all the poles 212 are lower than the top height of the module 2 (the top height of the module 2 is just the top height of the electric core body 211), so that after the module 2 is installed in the box 1, the top height of the electric core body 211 can be designed to be abutted against the inner side of the top wall of the box, and further the space utilization rate of the box 1 can be improved, that is, the integration of the battery pack is improved, and since the top heights of the poles 212 are individually designed at the two ends of the electric core body 211 are lower than the top height of the electric core body 211, the top heights of the electric core 212 are lower than the top height of the electric core body 211, and the bottom surface of the battery pack is not deformed when the battery pack is disposed at the same, and the bottom surface of the battery pack is not arranged at the bottom surface of the conventional battery pack, or the battery pack is not deformed, and the side surface is avoided. Moreover, even if the top wall of the battery pack is slightly deformed, since the top height of the pole 212 is lower than the top height of the battery cell body 211, that is, the top height of the pole 212 is lower than the top wall of the case 1, even if the top wall of the case 1 is made of aluminum, the slight deformation of the top wall of the case 1 is difficult to contact with the plurality of poles 212 below to cause short circuit, so that the safety performance of the battery pack is further improved; in addition, since the length of the cell body 211 is greater than or equal to 200mm and less than 400mm, the cell body 211 has a shorter length, and for such a shorter length of the cell body 211, the strength of the housing itself is higher, especially when the cell 21 is made of a ternary system material with lower stability (i.e., when the cell 21 is a ternary blade cell), even if the cell 21 is out of control, the housing of the cell body 211 with higher strength is difficult to burst, and finally the battery pack can have better safety.

Referring to fig. 1-3 and 5-9, optionally, the case 1 includes a case cover 3, a bottom wall 11, at least two mutually parallel lateral walls 12 and at least two mutually parallel longitudinal walls 13 disposed on the bottom wall 11, and two adjacent lateral walls 12 and two adjacent longitudinal walls 13 enclose a module space; the inside of the longitudinal wall 13 is provided with a longitudinal cavity, the inside of at least one transverse wall 12 is provided with a transverse cavity, a plurality of longitudinal cavities are communicated through at least one transverse cavity to form an inner wall cavity, the inner wall cavity is communicated with the outer space of the box body 1, wherein the longitudinal cavity is the side wall cavity, and the wall hole 14 is arranged on one side of the longitudinal wall 13 facing the corresponding explosion-proof valve 213; the module 2 is configured to be placed in the module space, and the length direction of the battery core body 211 is perpendicular to the longitudinal wall 13, and the case cover 3 is configured to cover the top of the module space.

In this embodiment, after the module 2 with the overall structure is placed in the module space in the case 1 from top to bottom, the case cover 3 is covered on the top of the module space, so that the battery pack can be assembled. The case cover 3, that is to say the top wall, the bottom wall 11, the longitudinal wall 13 and the transverse wall 12 of the case 1, form a case body, and the case body and the case cover 3 form the case 1.

In this embodiment, two adjacent longitudinal walls 13 and two adjacent transverse walls 12 enclose to form a module space for arranging one module 2, in each cell 21, an explosion-proof valve 213 is disposed at two ends of the cell body 211 in the length direction, that is, the left end and the right end of the cell body 211 are respectively provided with an explosion-proof valve 213, after the module 2 is installed in the module space, the explosion-proof valve 213 can be communicated with the wall hole 14 of the longitudinal wall 13, and the longitudinal cavity in the longitudinal wall 13 is communicated with the transverse cavity of the inner wall of the transverse wall 12 to form an inner wall cavity, that is, after the module 2 is installed in the module space, the explosion-proof valve 213 can be communicated with the inner wall space through the wall hole 14. Thus, after a certain electric core 21 is out of control, the generated smoke inside the electric core body 211 can enter the inner wall space through the explosion-proof valve 213 and the wall hole 14, and is discharged to the external environment from the inner wall space, so that the influence on other electric components inside the box body 1, such as other good electric cores 21, is avoided.

The inner wall space can be communicated with the external environment through the one-way valve, so that gas can only go out from the inner wall space, and the gas in the external environment cannot enter the inner wall space.

The box body 1 may be formed by splicing metal hollow tubes, for example, by adopting aluminum profile splice welding, that is, the bottom wall 11, the longitudinal wall 13 and the transverse wall 12 may adopt aluminum profiles with plate-shaped structures.

As mentioned above, since the length of the battery cell body 211 is greater than or equal to 200mm and less than 400mm, the length of the battery cell body 211 is shorter, and for such a shorter length of the battery cell body 211, the strength of the housing of the battery cell body 211 is higher, especially when the battery cell 21 is made of a ternary system material with lower stability (i.e., when the battery cell 21 is a ternary blade battery cell), even if the battery cell 21 is in thermal runaway, the housing of the battery cell body 211 with higher strength will not burst before the burst valve 213 is activated, so that the burst valve 213 can be activated when the thermal runaway of the battery cell 21 is ensured, and finally the battery pack can have better safety.

It will be appreciated that the case 1 and the case cover 3 may be made of aluminum materials commonly used in the field of battery packs.

Referring to fig. 3 and 7, optionally, an insulating layer 31 is disposed at a position of the cover 3 corresponding to the pole 212, and the cover 3 is connected to the pole 212 through the insulating layer 31 and wraps the pole 212.

In this embodiment, the case cover 3 is also considered as a whole before the battery pack assembly, and when the case cover 3 is covered on the top of the module space, the inner wall of the case cover 3 (i.e., the lower wall of the case cover 3) abuts against the pole 212 through the insulating layer 31. It can be understood that one module 2 corresponds to two insulating layers 31, and in one module 2, the posts 212 at the left end of the top of all the cell bodies 211 are abutted and wrapped by one insulating layer 31, and the posts 212 at the right end of the top of all the cell bodies 211 are abutted and wrapped by the other insulating layer 31. Thus, even if the case cover 3 is greatly deformed when the vehicle collides, the insulating layer 31 can ensure that the pole 212 and the pole 212 do not short-circuit through the aluminum case cover 3.

The insulating layer 31 is a composite insulating layer, and is mainly made of fibers (such as aramid fibers) and a plastic substrate, so that the insulating layer has high structural strength and can better resist deformation of the case cover 3 while insulation between the pole 212 and the aluminum case cover 3 is ensured. The insulating layer 31 and the pole 212 may be fixed by hot pressing.

Referring to fig. 6-8, optionally, the module 2 further includes a sealing foam 22 and a smooth film 23, two sealing foam 22 are disposed at two ends of the cell body 211 in the length direction, the smooth film 23 is attached to the sealing foam 22, the smooth film 23 and the sealing foam 22 are respectively provided with a first hole structure corresponding to the explosion-proof valve 213, one side of the longitudinal wall 13, close to the corresponding explosion-proof valve 213, is attached with an adhesive layer 15, the adhesive layer 15 is provided with a second hole structure corresponding to the wall hole 14, and the module 2 is used for being connected with the adhesive layer 15 through the smooth film 23, wherein when the sealing foam 22 is in a natural state, the distance between two smooth films 23 is greater than the distance between two adjacent adhesive layers 15.

In this embodiment, the module 2 may further include a sealing foam 22 and a smooth film 23 in addition to the plurality of electric cells 21 and the explosion-proof valve 213, when the module 2 is assembled, the plurality of electric cells 21 are stacked in advance outside the case 1, the plurality of electric cells 21 are arranged side by side, then the sealing foam 22 with double-sided adhesive tape is adhered to two ends of the electric cell 21 in the length direction, and the smooth film 23, such as polyimide adhesive tape, is adhered to the outer side of the sealing foam 22 in advance. After the modules 2 are stacked outside the box 1, in a natural state (in an unstressed state) of the sealing foam 22, the overall width W1 of the modules 2 (i.e., the distance between the two sides of the smooth film 23 facing away from one side) is greater than the distance W2 between the adhesive layers 15 of the two adjacent longitudinal walls 13. After that, when the battery pack is assembled, the module 2 can be regarded as a whole, the module 2 can be sucked by the tool chuck from the top, and the sealing foam 22 corresponding to the sealing foam is clamped and compressed by the tool chuck from the left side and the right side, the tool places the module 2 into the module space of the box body 1 along the vertical direction, the bottom of the module 2 is abutted with the bottom wall 11 of the box body 1, after the module 2 reaches the assembly depth, the tool chuck presses the module 2 at the top, the module 2 is limited to move in the height direction, the chuck is pulled upwards, and the sealing foam 22 is stretched due to the elasticity of the sealing foam when the chuck is pulled, and is bonded and fixed with the bonding layer 15 corresponding to the longitudinal wall 13 through the smooth film 23.

The sealing foam 22 plays a role in sealing, so that the inside of the battery cell 21 can only enter the inner wall space through the wall hole 14 and then be discharged to the external environment when the battery cell is out of control. The smooth film 23 can ensure that the sealing foam 22 is smoothly pressed down into the module space, and the adhesive layer 15 can be double-sided adhesive tape.

Referring to fig. 5 and 2, optionally, three longitudinal walls 13 are provided, the three longitudinal walls 13 are respectively a first longitudinal wall 131, a third longitudinal wall 133 and a second longitudinal wall 132 which are sequentially provided, the transverse walls 12 are respectively a first transverse wall 121, a second transverse wall 122 and a third transverse wall 123 which are sequentially provided, the first longitudinal wall 131 is provided at one end of the three transverse walls 12, the second longitudinal wall 132 is provided at the other end of the three transverse walls 12, one end of the third longitudinal wall 133 is connected with the middle part of the second transverse wall 122, the other end of the third longitudinal wall 133 is connected with the other end of the third transverse wall 123, one module space is formed by enclosing between the third longitudinal wall 133, the first longitudinal wall 131, the second transverse wall 122 and the third transverse wall 123, one module space is formed by enclosing between the third longitudinal wall 133, the second longitudinal wall 132, the second transverse wall 122 and the third transverse wall 123, and another module space is formed by enclosing between the third longitudinal wall 133, the second transverse wall 122 and the third transverse wall 123, and the other module space is formed by enclosing between the second longitudinal wall 122, the second longitudinal wall and the other module space is formed by enclosing the third longitudinal wall 122, the other module space and the second longitudinal wall 122.

In this embodiment, when the battery pack needs to be packaged with a plurality of modules 2, for example, when two die holders are mounted, a module space is formed by enclosing the third longitudinal wall 133, the first longitudinal wall 131, the second transverse wall 122 and the third transverse wall 123, another module space is formed by enclosing the third longitudinal wall 133, the second longitudinal wall 132, the second transverse wall 122 and the third transverse wall 123, and the explosion-proof valves 213 near one end of the two modules 2 share the longitudinal space in the middle third longitudinal wall 133, so that the integration level of the battery pack can be improved.

Wherein the first and second lateral walls 121 and 122, and the first and second longitudinal walls 131 and 132 enclose other spaces therebetween, which may provide arrangement spaces for relays, fuses, battery management systems, and the like.

Referring to fig. 1, optionally, the battery pack further includes a service cover 4, and the service cover 4 is configured to cover the top of the other space.

In the present embodiment, the maintenance cover 4 can protect the relay, the fuse, the battery management system, and the like in the other space.

Referring to fig. 1-3 and fig. 9, the size of the case cover 3 may be the same as the cross-sectional size of the case body 1, in this case, a through hole corresponding to the other space may be formed in the case cover 3, and after the case cover 3 is covered, the maintenance cover 4 is mounted at the through hole, so that the top of the other space may be covered.

Referring to fig. 3 and 9, optionally, a first cooling flow channel 32 corresponding to the top of the battery core body 211 is provided in the interior of the case cover 3, and a first liquid inlet 331 and a first liquid outlet 332 that are communicated with the first cooling flow channel 32 are provided on the surface of the case cover 3; the first heat conducting glue layer 34 is disposed at a position of the case cover 3 corresponding to the top of the battery cell body 211, and the first heat conducting glue layer 34 is used for being connected with the top of the battery cell body 211.

In this embodiment, the case lid 3 is a hollow plate, the first cooling flow channel 32 is provided in the case lid 3, the first liquid inlet 331 and the first liquid outlet 332 are provided on the surface, the inner wall of the case lid 3 is connected with the top of the battery core body 211 through the first heat conducting glue layer 34, so that the cooling liquid can enter the first cooling flow channel 32 from the first liquid inlet 331, and then flows out of the first cooling flow channel 32 from the first liquid outlet 332, and the temperature of the module 2 is reduced under the action of the first large heat conducting glue layer.

Referring to fig. 1-3 and fig. 9, the size of the case cover 3 may be the same as the cross-sectional size of the case body 1, in this case, a through hole corresponding to the other space may be formed in the case cover 3, and after the case cover 3 is covered, the maintenance cover 4 is mounted at the through hole, so that the top of the other space may be covered. Here, referring to fig. 9, the first liquid inlet 331 and the first liquid outlet 332 may be provided at the through opening of the case cover 3.

Optionally, a second cooling flow channel (not shown in the drawing) is provided in the bottom wall 11, a side surface of the bottom wall 11 facing the case cover 3 is provided with a second liquid inlet and a second liquid outlet which are communicated with the second cooling flow channel, and a second heat-conducting glue layer 35 is provided on the inner wall of the bottom wall 11, and the second heat-conducting glue layer 35 is used for being connected with the bottom of the battery cell body 211.

In this embodiment, the bottom wall 11 of the box 1 is also a hollow plate, a second cooling flow channel is provided in the bottom wall 11, a second liquid inlet and a second liquid outlet are provided on the surface, the bottom wall 11 is connected to the bottom of the module 2 through a second heat conducting glue layer 35 towards one side surface of the box cover 3, so that cooling liquid can enter the second cooling flow channel from the second liquid inlet, flows out of the second cooling flow channel from the second liquid outlet, and cools the module 2 under the action of the second large heat conducting glue layer. Through cooling down simultaneously the upper and lower both sides of module 2, the cooling effect is better. An automobile of another embodiment of the present application includes a battery pack as previously described.

Because the technical improvement and beneficial effects of the automobile are the same as those of the battery pack, the automobile is not repeated.

The terms "first" and "second" 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 defining "a first" and "a second" may explicitly or implicitly include at least one such feature.

Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.

Claims (10)

1. The utility model provides a battery package, its characterized in that, includes box (1) and module (2), module (2) set up in box (1), module (2) are including a plurality of electric core (21) that stack in proper order along the horizontal direction, electric core (21) include electric core body (211) and set up in explosion-proof valve (213) on electric core body (211), box (1) with the inside lateral wall that explosion-proof valve (213) set up corresponds is provided with the lateral wall cavity, just box (1) with the lateral wall that explosion-proof valve (213) set up correspond be provided with lateral wall hole (14) of lateral wall cavity intercommunication, explosion-proof valve (213) are used for with corresponding wall hole (14) intercommunication, lateral wall cavity with the outside space of box (1) communicates.

2. The battery pack according to claim 1, wherein the battery cell (21) further comprises a pole (212), the length of the battery cell body (211) is greater than or equal to 200mm and less than 400mm, concave portions (2111) are respectively formed at two ends of the top of the battery cell body (211) in a downward concave mode, the pole (212) is arranged at the concave portions (2111), and the top height of the pole (212) is lower than the top height of the battery cell body (211), and the explosion-proof valves (213) are respectively arranged at two ends of the battery cell body (211) in the length direction.

3. The battery pack according to claim 2, wherein the case (1) comprises a case cover (3), a bottom wall (11), and at least two mutually parallel lateral walls (12) and at least two mutually parallel longitudinal walls (13) provided on the bottom wall (11), adjacent two of the lateral walls (12) and adjacent two of the longitudinal walls (13) enclosing a module space;

the inside of the longitudinal wall (13) is provided with a longitudinal cavity, the inside of at least one transverse wall (12) is provided with a transverse cavity, a plurality of longitudinal cavities are communicated through at least one transverse cavity to form an inner wall cavity, the inner wall cavity is communicated with the outer space of the box body (1), the longitudinal cavity is the side wall cavity, and the wall hole (14) is formed in one side of the longitudinal wall (13) facing towards the corresponding explosion-proof valve (213);

the module (2) is used for being placed in the module space, the length direction of the battery core body (211) is perpendicular to the longitudinal wall (13), and the box cover (3) is used for being covered on the top of the module space.

4. A battery pack according to claim 3, wherein an insulating layer (31) is provided at a position of the case cover (3) corresponding to the pole (212), and the case cover (3) is adapted to be connected to the pole (212) through the insulating layer (31) and to wrap the pole (212).

5. A battery pack according to claim 3, wherein the module (2) further comprises sealing foam (22) and smooth films (23), two sealing foam (22) are arranged at two ends of the length direction of the battery cell body (211), the smooth films (23) are attached to the sealing foam (22), the smooth films (23) and the sealing foam (22) are respectively provided with a first hole structure corresponding to the explosion-proof valve (213), an adhesive layer (15) is attached to one side of the longitudinal wall (13) close to the corresponding explosion-proof valve (213), the adhesive layer (15) is provided with a second hole structure corresponding to the wall hole (14), and the module (2) is used for being connected with the adhesive layer (15) through the smooth films (23), wherein when the sealing foam (22) is in a natural state, the distance between the two smooth films (23) is larger than the distance between the two adjacent adhesive layers (15).

6. The battery pack according to claim 3, wherein three longitudinal walls (13) are provided, the three longitudinal walls (13) are respectively a first longitudinal wall (131), a third longitudinal wall (133) and a second longitudinal wall (132) which are sequentially provided, the transverse wall (12) is provided with three, the three transverse walls (12) are respectively a first transverse wall (121), a second transverse wall (122) and a third transverse wall (123) which are sequentially provided, the first longitudinal wall (131) is provided at one end of the three transverse walls (12), the second longitudinal wall (132) is provided at the other end of the three transverse walls (12), one end of the third longitudinal wall (133) is connected with the middle part of the second transverse wall (122), the other end of the third longitudinal wall (133) is connected with the other end of the third transverse wall (123), wherein the third longitudinal wall (133), the first longitudinal wall (131), the second transverse wall (123) and the third transverse wall (122) form a combined longitudinal space between the third transverse wall (122), the second longitudinal wall (132) and the third transverse wall (122), the second longitudinal wall (122) and the third transverse wall (122) to form a combined longitudinal space between the first transverse wall (123), the second transverse wall (122) and the second transverse wall (122), the first longitudinal wall (131) and the second longitudinal wall (132) enclose a further space therebetween for arranging at least one of a relay, a fuse and a battery management system.

7. The battery pack according to claim 6, further comprising a service cover (4), the service cover (4) being adapted to cover the top of the other space.

8. A battery pack according to claim 3, wherein a first cooling flow channel (32) corresponding to the top of the battery cell body (211) is arranged in the case cover (3), and a first liquid inlet (331) and a first liquid outlet (332) which are communicated with the first cooling flow channel (32) are arranged on the surface of the case cover (3);

and/or, the inside of diapire (11) is provided with the second cooling runner, the surface of diapire (11) be provided with second inlet and the second liquid outlet of second cooling runner intercommunication, the orientation of diapire (11) a side of case lid (3) is provided with second heat conduction glue film (35), second heat conduction glue film (35) be used for with the bottom of electric core body (211) is connected.

9. The battery pack according to claim 8, wherein a first heat conductive adhesive layer (34) is provided at a position of the case cover (3) corresponding to the top of the battery cell body (211), and the first heat conductive adhesive layer (34) is used for being connected with the top of the battery cell body (211).

10. An automobile comprising the battery pack according to any one of claims 1 to 9.