CN220324552U - Battery pack and energy storage device - Google Patents

Abstract

The utility model discloses a battery pack and an energy storage device, comprising at least one battery module, wherein the battery module comprises a plurality of electric cores which are sequentially arranged along a first direction; and the battery module is accommodated in the shell, a plurality of memory ventilation parts are arranged on the shell and used for forming a ventilation channel communicated with the interior of the shell, the memory ventilation parts are made of memory metal materials, and the memory ventilation parts are suitable for expanding or shrinking along with temperature change of the battery module. The memory ventilation piece is arranged on the shell to radiate heat of the battery pack, and the size of the opening is regulated according to the difference of the temperature of the battery core during operation, so that the air quantity of each position of the module is controlled; the memory ventilation piece near the middle area of the battery module is enlarged along with the temperature rise, so that the air quantity of the memory ventilation piece is increased, the middle heat dissipation effect is improved, and in the area with lower temperature, the opening of the memory ventilation piece is small, the air quantity is small, thereby improving the temperature uniformity of the whole module and prolonging the service life of the battery.

Description

Battery pack and energy storage device

Technical Field

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

Background

Along with the development of energy storage systems towards scale and intensification, the safety requirements are also continuously improved. In the past few years, fire events have been common, and an important cause of fire is the failure of the battery protection system, particularly when there is a failure in the battery operation, which can lead to failure of the battery thermal management system.

The main heat dissipation modes adopted for heat dissipation and cooling of the interior of the battery box are air cooling and water cooling. The air cooling refers to that a fan is additionally arranged on the battery box, so that air convection is increased, and heat on the surface of the battery cell is taken away; the water cooling refers to introducing a cold water pipe into the battery box to exchange heat with the surface of the battery cell, so as to take away the heat of the battery cell.

The water cooling structure is complex, the cost is high, and the danger of condensate leakage exists. And as the capacity of the energy storage system is higher, the density of the battery cells is higher, the heat of the battery cells at the middle position in the arrangement direction of the battery cells is obvious, and the air cooling is difficult to meet the requirement on the temperature uniformity of the battery pack. Single thermal management techniques have failed to meet the increasingly high cell density requirements.

Disclosure of Invention

In view of the above-mentioned drawbacks or shortcomings in the prior art, it is desirable to provide a battery pack and an energy storage device, in which the size of the memory channel can be adjusted according to the temperature of the battery cell, so as to improve the temperature uniformity of the battery pack.

In a first aspect, the present application provides a battery pack, at least one battery module, the battery module including a plurality of cells arranged sequentially along a first direction; and

the battery module is accommodated in the shell, a plurality of memory ventilation pieces are arranged on the shell and used for forming ventilation channels communicated with the interior of the shell, the memory ventilation pieces are made of memory metal materials and are suitable for expanding or shrinking along with temperature change of the battery module.

According to the battery pack, the memory ventilation piece is arranged on the shell to radiate heat of the battery pack, and the size of the opening is adjusted according to the difference of the temperature of the battery core during operation, so that the air quantity of each position of the module is controlled; when the battery module works, the middle temperature is higher than that of the whole battery module, the memory ventilation part close to the middle area of the battery module is enlarged along with the temperature rise, so that the air quantity of the memory ventilation part is increased, the middle heat dissipation effect is improved, and the memory ventilation part is small in opening and air quantity in the area with lower temperature, so that the temperature uniformity of the whole module is improved, and the service life of the battery is prolonged.

Optionally, the housing includes a lower shell and a top cover, the lower shell includes four side plates, a bottom plate, and a containing cavity formed by enclosing the four side plates and the bottom plate and having an opening, and the containing cavity is used for containing the battery module; the top cover is covered on the opening of the lower shell;

the plurality of memory ventilation pieces are arranged on at least one of the four side plates.

The battery pack provided in the application can facilitate the fixation and the installation of the battery module by arranging the lower shell and the top cover, and can realize the heat dissipation of the battery module from the side face by arranging a plurality of memory ventilation pieces on the side plate, thereby improving the heat dissipation effect.

Optionally, the four side plates include two first side plates perpendicular to the first direction and two second side plates parallel to the first direction, a plurality of memory ventilation pieces are arranged on the two second side plates, and the plurality of memory ventilation pieces are arranged on the second side plates side by side along the first direction.

The battery pack that this application provided, a plurality of side to the electric core stacks set up a plurality of memory ventilation spare on the curb plate of side and dispel the heat to the battery pack, can improve the radiating effect, and the side just dispels the heat through just the electric core side to the side of electric core in this application, can also prevent to set up the water droplet because of heat is mutual in electric core top surface position department, produces the influence to the connection piece on electric core top.

Optionally, the second side plate includes a frame and a mounting plate fixedly arranged on the frame, the frame includes a frame body and a mounting opening, the shape of the mounting opening is adapted to the shape of the mounting plate, and the mounting opening is used for mounting the mounting plate;

the plurality of memory ventilation pieces are arranged in parallel along a first direction on the mounting plate.

According to the battery pack, the second side plate is of a split type structure, memory metal is convenient to process, the memory ventilation piece made of the memory metal is arranged on the mounting plate, and then the shell is formed with the frame in a fixed mode, so that the processing is convenient, and meanwhile cost is saved; the mechanical properties of shell can be improved simultaneously through the setting of mounting panel, adopts other metal materials through the mounting panel, avoids the mounting panel to change the use that influences the battery package when being heated.

Optionally, the mounting plate is provided with a plurality of first air openings in parallel along a first direction, one memory ventilation piece is fixedly arranged on one first air opening, the ventilation channel is communicated with the first air opening, and the memory ventilation piece is provided with a second air opening communicated with the ventilation channel.

According to the battery pack, the first air openings are formed in the mounting plate and are communicated with the accommodating cavity in the shell, and the heat dissipation effect of each battery core in the battery module can be controlled by arranging the plurality of first air openings in the first direction of the arrangement direction of the battery module; the ventilating duct formed by the memory ventilating piece is communicated with the first air port, the second air port is communicated with the first air port to realize the heat dissipation function of the accommodating cavity, and the heat dissipation effect is improved by arranging a plurality of memory air channels, so that the temperature uniformity of the whole module is improved.

Optionally, the first tuyere extends along a second direction, and the second direction intersects with the first direction;

the ventilation channel extends from the first air opening to the second air opening, the second air opening extends along the second direction, and the second air opening is suitable for expanding or shrinking along with temperature change of the battery module.

According to the battery pack, the memory ventilation piece forming the ventilation channel is made of the memory metal material, so that the size of the second air opening can be controlled on one hand, and the air inlet quantity is further controlled; on the other hand, the size of the ventilating duct can be controlled, the air inlet speed to the accommodating cavity is controlled, the heat dissipation effect is improved, and the temperature uniformity of the whole battery module is controlled.

Optionally, a cooling fan is arranged on one of the two first side plates, and the wind direction of the cooling fan is along a first direction;

the second air port faces away from the cooling fan.

The battery pack provided in the application dissipates heat to the battery module containing the inside of the cavity through the cooling fan, the heat dissipation effect of the battery pack can be improved, the airflow velocity at all positions inside the shell can be more uniform through the direction of the second air port facing away from the cooling fan, the temperature of each battery cell can be more uniform, and turbulence can be avoided to influence the heat dissipation effect.

Optionally, the memory ventilation piece comprises an arc-shaped side wall extending from the first air port to the second air port and two connecting side walls respectively arranged at two sides of the arc-shaped side wall along the second direction, wherein the two connecting side walls are respectively and fixedly arranged at two ends of the mounting plate along the second direction;

the arc-shaped side walls, the two connecting side walls and the mounting plate are enclosed to form the ventilating duct.

The battery package that provides in this application, arc lateral wall one end just to the position of first wind gap, the other end just to the position of second wind gap, realizes the intercommunication of wind gap in two directions through the arc structure, and the top cap is fixed to be set up and forms the air inlet section on the mounting panel, and the arc lateral wall forms the arc air inlet section in addition, can also prevent to get into the inside air current of shell from the air intake and produce the swirl and increase flow resistance in the air inlet section.

Optionally, the battery cell further comprises a partition plate arranged between two adjacent battery cells, wherein a plurality of protrusions extending along a third direction are arranged on the partition plate, and the protrusions are arranged on at least one side of the partition plate along the first direction. The two parts

The battery package that provides in this application, the heat dissipation wind channel extends along the third direction and is linked together with the memory ventilation piece that sets up in electric core second face position department, utilizes radiator fan's cooperation, can make external cold wind enter into in the shell, can carry out the heat dissipation of electric core side through the heat dissipation wind channel, improves the radiating effect.

In a second aspect, the present application provides an energy storage device comprising a battery pack as defined in any one of the preceding claims. The energy storage device provided in the present application has all the features and advantages of the battery pack described above, and will not be described in detail herein.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

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

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

fig. 3 is a schematic structural diagram of a battery cell set according to an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a frame according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a mounting plate according to an embodiment of the present utility model;

FIG. 6 is a side view of a mounting plate provided by an embodiment of the present utility model;

FIG. 7 is a schematic structural view of a mounting plate body according to an embodiment of the present utility model;

FIG. 8 is a top view of a mounting plate according to an embodiment of the present utility model when the memory vent is in an initial state;

FIG. 9 is a schematic view of a mounting plate according to an embodiment of the present utility model when the memory vent is enlarged;

FIG. 10 is a schematic top view of a mounting plate with memory ventilation enlarged according to an embodiment of the present utility model;

FIG. 11 is an enlarged schematic view of a portion of a mounting plate with memory ventilation enlarged, according to an embodiment of the present utility model;

fig. 12 is a schematic structural diagram of an energy storage device according to an embodiment of the present utility model.

In the drawing the view of the figure,

1000. a battery pack; 2000. a cluster frame; 2010. a cross beam; 2020. a column;

100. a housing; 200. a battery module; 300. a memory ventilation member;

10. a battery cell; 201. a first face; 202. a second face; 203. a top surface; 210. a cell group; 20. a connecting sheet;

30. a heat radiation fan;

101. a first side plate; 102. a second side plate; 103. a top cover; 104. a bottom plate;

110. a lower housing; 120. a frame; 121. a mounting plate;

122. an air duct; 123. a first tuyere; 124. a second tuyere; 1201. a connection part; 1202. an arcuate sidewall; 1203. connecting the side walls;

400. a partition plate; 410. a protrusion; 420. and a heat dissipation air duct.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1-2 in detail, the present application provides a battery pack 1000 comprising:

at least one battery module 200, the battery module 200 including a plurality of battery cells 10 sequentially arranged in a first direction; and

the battery module 200 is accommodated in the housing 100, a plurality of memory ventilation members 300 are disposed on the housing 100, the memory ventilation members 300 are used for forming ventilation channels 122 communicated with the interior of the housing 100, the memory ventilation members 300 are made of memory metal, and the memory ventilation members 300 are suitable for expanding or shrinking along with temperature change of the battery module 200.

According to the battery pack 1000 provided by the embodiment of the application, the memory ventilation piece 300 is arranged on the shell 100 to radiate heat of the battery pack 1000, and the size of the opening is regulated according to different temperatures of the battery cell 10 during working, so that the air quantity of each position of the module is controlled; when the battery module 200 works, the middle temperature is higher than that of the whole battery module 200, the memory ventilation piece 300 close to the middle area of the battery module 200 expands along with the temperature rise, so that the air quantity of the memory ventilation piece 300 increases, the middle heat dissipation effect is improved, and the opening of the memory ventilation piece 300 is small and the air quantity is small in the area with lower temperature, thereby improving the temperature uniformity of the whole battery module and prolonging the service life of the battery.

The memory metal can recover the special metal material with the original macroscopic shape in another temperature range after plastic deformation in a certain temperature range. Depending on the temperature of the cell 10, the memory metal material may be selected from nickel-titanium alloy, copper-zinc alloy, copper-aluminum-nickel alloy, copper-molybdenum-nickel alloy, copper-gold-zinc alloy, and the like, which is not limited in this application.

In this embodiment, the heat dissipation temperature of the battery pack 1000 may be as high as 60 ℃ and the memory metal is nickel-titanium alloy, for example. At this time, when the temperature exceeds a preset temperature (e.g., 40 °), the memory ventilation member 300 is gradually deformed and opened, the air volume is increased to keep the battery temperature stable against overheating, and when the temperature is lower than the preset temperature, the memory metal is gradually contracted until the initial state is restored.

The battery module 200 includes a plurality of electric cells 10 sequentially arranged along a first direction X, the electric cells 10 include a top surface 203, and a first surface 201 and a second surface 202 perpendicular to the top surface 203, the top surface 203 is provided with a connecting piece 20 for electrical connection between the electric cells 10, the first surface 201 is parallel to the first direction X, and the second surface 202 is parallel to a second direction Y.

The first direction X is defined herein as a width direction along the cell 10, the second direction Y is defined herein as a height direction along the cell 10, and the third direction Z is defined herein as a length direction along the cell 10. The length of the battery cell 10 is greater than the width of the battery cell 10, and the specific size of the battery cell 10 is not limited in the embodiment of the present application.

In this application, the number and arrangement of the battery cells 10 in the battery pack 1000 are not limited, and the memory ventilation member 300 disposed on the battery pack 1000 can radiate heat from a plurality of battery cells 10 simultaneously, so as to improve heat radiation uniformity. The number of battery modules in the battery pack 1000 is not limited in this application, and the battery modules may be one, two or more.

The utility model discloses a can fix a plurality of electric core 10 in the electric core group 210 through annular ribbon in this application, ensure that battery module 200 is fixed reliable, a plurality of battery modules 200 are arranged along third direction Z in the battery package 1000 in this application. In this application, the battery pack 1000 includes two battery modules 200 disposed side by side, and each battery module 200 includes a plurality of battery cells 10 disposed side by side along the first direction X.

The housing (100) comprises a lower shell (110) and a top cover (103), wherein the lower shell (110) comprises four side plates, a bottom plate (104) and a containing cavity with an opening, wherein the containing cavity is formed by encircling the four side plates and the bottom plate (104) and is used for containing the battery module 200; the top cover 103 is covered on the opening of the lower shell 110; wherein at least one of the four side plates is provided with the plurality of memory ventilation members 300.

The battery pack 1000 provided in the present application can facilitate the assembly of the battery module 200 and the housing 100, the maintenance of the battery module 200, and the like by providing the lower case 110 and the top cover 103. Through the opening provided on the lower case 110, the connection of the connection member on the battery module 200 with the poles of the battery cell 10 can be facilitated, and the batteries can be assembled in series or in parallel through the connection member. By arranging the plurality of memory ventilation pieces 300 on the side plates, heat dissipation of the battery module 200 from the side is achieved, and heat dissipation effect is improved.

The location of the memory ventilation member 300 is not limited in this embodiment, and the memory ventilation member 300 may be disposed on each side plate or bottom plate 104 or top cover 103, and may be disposed as needed in different embodiments, which are exemplarily described in this embodiment as being disposed on the side plate.

The four side plates comprise two first side plates 101 perpendicular to the first direction and two second side plates 102 parallel to the first direction, a plurality of memory ventilation pieces 300 are arranged on the two second side plates 102, and the plurality of memory ventilation pieces 300 are arranged on the second side plates 102 side by side along the first direction.

The first side plate 101 is opposite to the second surface 202 of the battery cell 10, the second side plate 102 is opposite to the first surface 201 of the battery cell 10, the top cover 103 is opposite to the top surface 203 of the battery cell 10, and in this application, the plurality of memory ventilation members 300 are illustratively disposed on two second side plates 102 disposed opposite to the housing 100.

In this application, it is exemplified that a plurality of battery cells are stacked in a large-surface direction, that is, in a direction of the second surface 202, the area of the second surface 202 is larger than the area of the first surface 201. The battery pack 1000 provided in the application, a plurality of through set up memory ventilation piece 300 at the side (second curb plate 102) of electric core 10 stacking direction and dispel the heat to battery pack 1000, can prevent to condense out the water droplet because of the heat is mutual in electric core 10 top surface 203 position department, produces the influence to connection piece 20 on electric core 10 top surface 203. Of course, in other embodiments, memory vents 300 may be provided on each side of the battery pack 1000 as desired, which is not limiting in this application.

In one embodiment of the present application, as shown in fig. 4 and fig. 5, the second side plate 102 includes a frame 120 and a mounting plate 121 fixedly disposed on the frame 120, where the frame 120 is provided with a mounting opening formed by enclosing four frames, and the shape of the mounting opening is adapted to the shape of the mounting plate 121, and the mounting opening is used for mounting the mounting plate 121;

the plurality of memory ventilation members 300 are juxtaposed in a first direction on the mounting plate 121.

The second side plates 102 in the application adopt split structures, so that the processing of memory metal is facilitated, the memory ventilation piece 300 adopting the memory metal is arranged on the mounting plate 120, and then the shell 100 is formed with the frame 110 in a fixed mode, so that the processing is facilitated, and meanwhile, the cost is saved. Only set up in this application memory ventilation piece 122 is memory metal material, can save the cost, improves the mechanical properties of shell 100 simultaneously, adopts other metal materials through mounting panel 121, avoids mounting panel 121 to warp when being heated and influences the use of battery package 1000.

It can be appreciated that, in the present application, the frame 120 is disposed around the mounting plate 121, the frame 120 is fixedly disposed around the mounting plate 121, and the fixing and mounting of the mounting plate 121 can be facilitated through the mounting opening disposed on the frame 120. The shape and number of the mounting openings and the mounting plate 121 are not limited in the embodiment of the present application, and the mounting openings in the present application may be circular, elliptical, square, polygonal, a shape formed by a curve and a straight line, or other irregular shapes. In this embodiment, the shape of the mounting plate 121 and the shape of the mounting opening are square.

In some embodiments, the frame 120 may be made of plastic material, and the frame 120 and the mounting plate 121 may be integrally formed, for example, the mounting plate 121 made of metal is placed in an injection mold, and the plastic material is injected into the mold to form an injection-molded integrated structure. For example, the first side plate 101 and the frame 120 may be made of insulating plastic, for example, one or more PP or PPs materials.

In other embodiments, the frame 110 may be made of a metal material, and the frame 110 may be fixedly connected to the mounting plate 120, the first side plate 101, and the top cover 103 by welding, riveting, bolting, or the like.

In this application, through will the fixed setting of memory ventilation spare 300 is in on the mounting panel 121, make things convenient for the machine-shaping of memory ventilation spare 300, because mounting panel 121 sets up along first direction, through will a plurality of memory ventilation spare 300 are in set up side by side along first direction on the mounting panel 121, can realize adjusting the opening size according to the difference of cell 10 during operation temperature to the amount of wind of each position of control module, in order to improve the samming nature of whole module, improve battery life. The number and distribution of the memory ventilation pieces 300 on the mounting plate 121 are not limited in this application, and may be set according to needs in different embodiments, and in this application, memory ventilation pieces 300 are uniformly distributed on the mounting plate 121 is exemplified.

It should be understood that the embodiment of the present application is not limited to the split manner of the housing 100, and the second side plate 102 may be a unitary structure, and in other embodiments, the memory ventilation member 300 may be fixed on the second side plate 102 by a fixing manner after being separately processed and formed, and may be set according to needs in different embodiments.

Alternatively, as shown in fig. 6 to 7, the mounting plate 121 is provided with a plurality of first air openings 123 juxtaposed in a first direction, one of the memory ventilation units 300 is fixedly provided on one of the first air openings 123, the air duct 122 communicates with the first air opening 123, and the memory ventilation unit 300 includes a second air opening 124 communicating with the air duct 122.

The battery pack 1000 provided in the present application can control the heat dissipation effect of each battery cell 10 in the battery module 200 by providing the first air port 123 on the mounting plate 121 to communicate with the receiving cavity inside the housing 100 and providing the plurality of first air ports 123 in the first direction along the arrangement direction of the battery module 200; the ventilating duct 122 formed by the memory ventilating piece 300 is communicated with the first air opening 123, the second air opening 124 is communicated with the first air opening 123 to realize the heat dissipation function of the accommodating cavity, and the heat dissipation effect is improved by arranging a plurality of memory air channels, so that the temperature uniformity of the whole module is improved.

The first tuyere 123 extends in a second direction and has a certain length in the second direction, and the second tuyere 124 extends in the second direction and has a certain length in the second direction, the second direction intersecting the first direction;

the air duct 122 extends from the first air port 123 to the second air port 124, the second air port 124 has a certain length in the second direction, and the second air port 124 is adapted to be enlarged or reduced as the temperature of the battery module 200 is changed.

In the battery pack 1000 provided in the present application, by setting the memory ventilation member 300 forming the ventilation duct 122 as a memory metal material, on one hand, the size of the second air opening 124 can be controlled, and thus the air intake rate can be controlled; on the other hand, the size of the ventilation channel 122 can be controlled, so that the air inlet speed to the accommodating cavity is controlled, the heat dissipation effect is improved, and the temperature uniformity of the whole battery module 200 is controlled.

When the battery cells 10 are operated, the operating temperature of each battery cell 10 is substantially different, and the temperature is lower at both ends of the battery module 200 in the first direction X closer to the battery module 200, and the temperature of the battery cell 10 is higher at the center of the battery module 200.

In the present application, by arranging a plurality of memory ventilation pieces 300 on the mounting plate 121 along the arrangement direction of the battery cells 10, heat dissipation can be performed on each battery cell 10 in the battery module 200, especially, the memory ventilation piece 300 near the center of the battery module 200 along the first direction X is expanded due to the influence of the high temperature of the battery cell 10, so as to increase the air volume of the memory ventilation piece 300; the memory ventilation members 300 at positions near both ends of the battery module 200 in the first direction X do not reach the deformation temperature to maintain the initial opening size, improving the heat dissipation uniformity of the battery pack 1000. FIG. 8 is a schematic view showing the structure of a mounting plate in the initial state of the memory ventilation member; a schematic of the structure of a mounting plate is shown in fig. 9-11 with the memory vent enlarged.

In addition, the one of the first side plates 101 is provided with a heat radiation fan 30, and a wind direction of the heat radiation fan 30 is set along a first direction X; the second air port 124 faces away from the cooling fan 30.

In the present application, the heat dissipation effect of the battery pack 1000 can be improved by the heat dissipation fan 30, the fan can be an induced draft fan and an exhaust fan, when the fan is the induced draft fan, the cool air outside the casing 100 is sucked into the casing 100 through the memory ventilation member 300 by the induced draft effect of the heat dissipation fan 30; when the fan is an exhaust fan, hot air inside the casing 100 is exhausted to the outside of the casing 100 by the memory wind through the blowing action of the heat radiation fan 30.

Accordingly, the second air opening 124 may be an air inlet or an air outlet in the present application, which is not limited in this application. By the second air opening 124 facing away from the cooling fan 30, the airflow velocity of the air flowing through the housing 100 can be more uniform, so that the temperature of each battery cell 10 can be more uniform, and the influence of turbulence on the cooling effect can be avoided.

The memory ventilation member 300 includes an arc-shaped side wall 1202 extending from the first air opening 123 to the second air opening 124, and two connecting side walls 1203 respectively disposed at two sides of the arc-shaped side wall 1202 along the second direction, wherein the two connecting side walls 1203 are respectively fixedly disposed at two ends of the mounting plate 121 along the second direction of the second air opening 124;

the arc-shaped side wall 1202, the two connecting side walls 1203 and the mounting plate 121 enclose to form the ventilation duct 122.

In this embodiment, the first air opening 123 faces the third direction Z, the second air opening 124 faces the first direction X, the memory ventilation member 122 includes an arc-shaped side wall 1202 extending from the first air opening 123 to the second air opening 124, and two connecting side walls 1203 respectively disposed on two sides of the arc-shaped side wall 1202 along the second direction Y, and the two connecting side walls 1203 are respectively fixedly disposed on two ends of the mounting plate 121 located on the second air opening 124 along the second direction Y.

In this application, arc lateral wall 1202 one end is just to the position of first wind gap 123, and the other end is just to the position of second wind gap 124, arc lateral wall 1202 is the arc in being on a parallel with the planar orthographic projection in electric core top surface place, realizes the intercommunication of wind gap in two directions through the arc structure, and the top cap is fixed to be set up and is formed the air inlet section on mounting panel 121, and arc lateral wall 1202 forms the arc air inlet section in addition, can also prevent to get into the inside air current of shell 100 from the air intake and produce the swirl and increase flow resistance in the air inlet section.

The utility model discloses a can also realize through the arc structure with mounting panel 121's fixed connection, can conveniently control the shape of air inlet section through setting up the connection lateral wall 1203 of both sides on along second direction Y to improve the fixed connection intensity between arc lateral wall 1202 and the mounting panel 121. The connection form can be welding, riveting, clamping or bolting, etc. It should be noted that, in the embodiment of the present application, the arc-shaped side wall 1202 and the connecting side wall 1203 may be made of a memory metal material, so that the memory ventilation member 122 may be expanded along multiple directions when being expanded, so as to increase the area of the second air opening 124, increase the air intake, and improve the heat dissipation effect.

Optionally, please continue to refer to fig. 3, further comprising a partition 400 disposed between two adjacent cells 10, wherein a plurality of protrusions 410 extending along a third direction Z are disposed on the partition 400, the plurality of protrusions 410 are disposed on at least one side of the partition 400 along the first direction, and the protrusions 410 are configured to form a heat dissipation air duct 420 disposed between the second surface 202 and the first surface.

The positions and the number of the separators 400 disposed on the battery module 200 are not limited in this application, and may be selected as needed. Grooves are formed between two adjacent protrusions 410, and when the protrusions 410 are in contact with the surface of the battery cell 10, gaps exist between the grooves of the partition 400 and the surface of the battery cell 10 to form the heat dissipation air duct 420, so as to conduct out heat between the battery cells 10 and 10. In this embodiment, the positions and the number of the protrusions 410 on the separator 400 are not limited, the protrusions 410 may be disposed on one side or two sides of the separator 400 that are in contact with the battery cell, the number of the protrusions 410 on the separator 400 may be one, two or more, and the shape of the protrusions 410 may be a straight line or a curved line.

In this application, the heat dissipation air duct 420 extends along the third direction Z and is communicated with the memory ventilation member 300 arranged at the position of the second face 202 of the battery cell 10, and by using the cooperation of the heat dissipation fan 30, external cold air can enter the housing 100, and the heat dissipation of the side face of the battery cell 10 can be performed through the heat dissipation air duct 420, so that the heat dissipation effect is improved.

The spacer 400 is made of a flexible material with good insulation and heat-proof properties, and may be made of a ductile plastic such as pc+abs. Insulation between the battery cell 10 and the separator 400 can be realized while insulating heat and absorbing expansion force, friction between the battery cell 10 and the protrusion 410 is avoided, short circuit is prevented, and the like. In addition, the protrusions 410 can also support the battery cell 10, so as to effectively relieve vibration of the battery.

In the application, the cell 10 is released by expansion force through compression deformation of the bulge 410 which is propped against the cell 10 partition 400, the pressure is absorbed on the cell 10 partition 400, and the cell 10 can be released through further compression deformation of the mounting plate 121; the protrusion 410 can be used as a reinforcing rib of the mounting plate 121, and can strengthen the structure of the partition 400, and the partition 400 can absorb the expansion force generated during the cyclic charge and discharge of the battery cell 10, thereby being beneficial to reducing the expansion force in the later cycle of the battery cell 10 and improving the cycle life of the battery cell 10.

Based on the same concept, as shown in fig. 12, the present application also provides an energy storage device including a battery pack 1000 as described in any one of the above. The energy storage device provided in the present application has all the features and advantages of the battery pack 1000 described above, and will not be described in detail herein.

Illustratively, the energy storage device includes a cluster frame and a plurality of battery packs 1000 disposed on the cluster frame, the cluster frame includes a plurality of beams and a plurality of columns, a plurality of mounting spaces are formed between the plurality of beams and the columns for placing the plurality of battery packs 1000, and the plurality of battery packs 1000 may be electrically connected in series, parallel, or series-parallel. The plurality of battery packs 1000 are arranged on the cluster frame in an array along the length direction and the height direction of the cluster frame, and in this embodiment, the battery packs 1000 are arranged on the cluster frame in the height direction of the cluster frame to form a plurality of rows of battery packs 1000, and the battery packs 1000 are arranged on the cluster frame in the length direction of the cluster frame to form a plurality of columns of battery packs 1000.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the utility model. Terms such as "disposed" or the like as used herein may refer to either one element being directly attached to another element or one element being attached to another element through an intermediate member. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present utility model has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed.

Claims (10)

1. A battery pack, comprising:

at least one battery module (200), the battery module (200) comprising a plurality of cells (10) arranged in sequence along a first direction; and

the battery module (200) is accommodated in the shell (100), a plurality of memory ventilation pieces (300) are arranged on the shell (100), the memory ventilation pieces (300) are used for forming ventilation channels (122) communicated with the interior of the shell (100), the memory ventilation pieces (300) are made of memory metal materials, and the memory ventilation pieces (300) are suitable for expanding or shrinking along with temperature change of the battery module (200).

2. The battery pack according to claim 1, wherein the outer case (100) includes a lower case (110) and a top cover (103), the lower case (110) includes four side plates, a bottom plate (104), and a receiving chamber having an opening defined by the four side plates and the bottom plate (104), the receiving chamber being for receiving the battery module (200); the top cover (103) is covered on the opening of the lower shell (110);

a plurality of memory ventilation pieces (300) are arranged on at least one of the four side plates.

3. The battery pack according to claim 2, wherein the four side plates include two first side plates (101) perpendicular to the first direction and two second side plates (102) parallel to the first direction, a plurality of memory ventilation pieces (300) are provided on each of the two second side plates (102), and the plurality of memory ventilation pieces (300) are provided side by side on the second side plates (102) along the first direction.

4. A battery pack according to claim 3, wherein the second side plate (102) comprises a frame (120) and a mounting plate (121) fixedly arranged on the frame (120), the frame (120) comprises a frame body (1201) and a mounting opening, the shape of the mounting opening is adapted to the shape of the mounting plate (121), and the mounting opening is used for mounting the mounting plate (121);

the plurality of memory ventilation members (300) are juxtaposed in a first direction on the mounting plate (121).

5. The battery pack according to claim 4, wherein the mounting plate (121) is provided with a plurality of first air holes (123) juxtaposed in a first direction, one of the memory ventilation members (300) is fixedly provided on one of the first air holes (123), the air passage (122) communicates with the first air hole (123), and the memory ventilation member (300) has a second air hole (124) communicating with the air passage (122).

6. The battery pack according to claim 5, wherein the first tuyere (123) extends in a second direction intersecting the first direction;

the ventilation channel (122) extends from the first air opening (123) to the second air opening (124), the second air opening (124) extends along the second direction, and the second air opening (124) is suitable for expanding or shrinking along with the temperature change of the battery module (200).

7. The battery pack according to claim 5, wherein a cooling fan (30) is provided on one of the two first side plates (101), and a wind direction of the cooling fan (30) is set in a first direction;

the second air opening (124) faces away from the cooling fan (30).

8. The battery pack according to claim 6, wherein the memory ventilation member (300) includes an arc-shaped side wall (1202) extending from the first air port (123) to the second air port (124) and two connecting side walls (1203) respectively provided on both sides of the arc-shaped side wall (1202) in the second direction, the two connecting side walls (1203) being fixedly provided on both ends of the mounting plate (121) in the second direction of the second air port (124), respectively;

the arc-shaped side walls (1202), the two connecting side walls (1203) and the mounting plate (121) are enclosed to form the ventilating duct (122).

9. The battery pack according to claim 2, further comprising a separator (400) disposed between adjacent two of the cells (10), wherein a plurality of protrusions (410) extending in a third direction are disposed on the separator (400), and wherein the plurality of protrusions (410) are disposed on at least one side of the separator (400) in the first direction.

10. An energy storage device comprising a battery pack according to any one of claims 1 to 9.