Energy storage device

Abstract

The utility model provides an energy storage device which comprises a battery module which comprises a first shell assembly provided with a first inner cavity, and a plurality of battery cells are arranged in the first inner cavity; the second shell assembly is provided with a second inner cavity, the battery module is arranged in the second inner cavity, the second shell assembly is provided with an air outlet communicated with the outside and the second inner cavity, at least one side of the second shell assembly in the circumferential direction of the air outlet is provided with an air guide face, and the air guide face inclines in the direction away from the air outlet. According to the energy storage device provided by the invention, the air guide surface inclines towards the direction far away from the air outlet, namely the air guide surface is an inclined surface diverging outwards from the air outlet. After the air is exhausted from the air outlet, at least one part of the air can be diffused outwards in an inclined mode under the guiding effect of the air guiding face, on one hand, the blocking effect of the wall face on part of the air can be reduced, and on the other hand, air noise generated at the air outlet can be reduced. Especially when the air exhaust device outputs a large amount of air at the air outlet at the same time, the effect is obvious.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage device. Background Art

[0002] With the continuous development of science and technology, more and more electrical devices are used in daily life, and electricity has become an indispensable energy source for homes and offices. In recent years, the frequency of extreme weather has increased. When extreme weather occurs, it is likely to cause damage to urban public power supply equipment, and in severe cases, it may cause unstable power supply in cities.

[0003] In order to obtain a relatively stable power supply in special situations such as unstable power supply, it is necessary to store power when the power supply is stable, so that the pre-stored power can be used to power the electrical equipment in the above special situations. Usually, a storage device including multiple battery cells is used to store power. In order to achieve heat dissipation, the energy storage device will be provided with a heat dissipation outlet for air circulation. If the heat dissipation outlet is blocked by objects or structures, the air flow at the heat dissipation outlet may be poor and the wind noise may be high. Utility Model Content

[0004] In view of this, the purpose of the present application is to propose an energy storage device to at least partially solve the problem of poor air flow and high wind noise at the heat dissipation outlet.

[0005] Based on the above-mentioned purpose, the present application provides an energy storage device, including: a battery module, including a first shell assembly provided with a first inner cavity, in which a plurality of battery cells are arranged; a second shell assembly, provided with a second inner cavity, in which the battery module is arranged, the second shell assembly is provided with an air outlet connecting the outside and the second inner cavity, the second shell assembly is provided with an air guide surface on at least one side of the circumference of the air outlet, and the air guide surface is inclined in a direction away from the air outlet.

[0006] From the above, it can be seen that the energy storage device provided by the present application has an air guide surface that is inclined in the direction away from the air outlet, that is, the air guide surface is an inclined surface that diverges outward from the air outlet. After the air is discharged from the air outlet, at least a part of the air can be inclined to diffuse outward under the guidance of the air guide surface, rather than being blown toward the wall along the axis of the air outlet. In this way, on the one hand, the blocking effect of the wall on part of the air can be reduced, and on the other hand, the wind noise generated at the air outlet can also be reduced. Especially when the output of the exhaust device is large and a large amount of air is discharged from the air outlet at the same time, the effect is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 A schematic diagram of a battery module of a first structure according to an embodiment of the present application;

[0009] Figure 2 This is a schematic diagram of a battery module of the first structure of an embodiment of the present application being hung on a wall;

[0010] Figure 3 A schematic diagram of a battery module of a second structure according to an embodiment of the present application;

[0011] Figure 4 An exploded schematic diagram of a battery module of the second structure of an embodiment of the present application;

[0012] Figure 5 A schematic diagram of a battery module of the second structure of an embodiment of the present application after the first box cover is removed;

[0013] Figure 6 for Figure 5 A magnified schematic diagram of part C;

[0014] Figure 7 for Figure 5 The enlarged schematic diagram of the D part;

[0015] Figure 8 is an enlarged schematic diagram of the third structure of part D;

[0016] Fig. 9 is an enlarged schematic diagram of the fourth structure of part D;

[0017] Fig.10 An exploded schematic diagram of a battery module of the fifth structure of an embodiment of the present application;

[0018] Fig.11 A schematic diagram of a battery module of a sixth structure of an embodiment of the present application after the first box cover is removed;

[0019] Fig.12 for Fig.11 The enlarged schematic diagram of part E in the middle;

[0020] Fig.13 is an enlarged schematic diagram of the seventh structure of Part E;

[0021] Fig.14An exploded schematic diagram of a battery module of the second structure according to an embodiment of the present application, viewed from another direction;

[0022] Fig.15 A schematic diagram of an energy storage device according to an embodiment of the present application;

[0023] Fig.16 An exploded schematic diagram of an energy storage device according to an embodiment of the present application;

[0024] Fig.17 A schematic cross-sectional view of an energy storage device according to an embodiment of the present application;

[0025] Fig.18 A schematic diagram of the energy storage device of the second structure of the embodiment of the present application after the second box cover is removed;

[0026] Fig.19 A schematic diagram of another viewing direction of the energy storage device of the second structure of an embodiment of the present application;

[0027] Fig. 20 A schematic diagram of the energy storage device of an embodiment of the present application after the second box cover is removed;

[0028] Fig.21 for Fig. 20 The enlarged schematic diagram of part F in the middle;

[0029] Fig. 22 An exploded schematic diagram of the energy storage device according to another embodiment of the present application;

[0030] Fig.23 A schematic diagram of an energy storage device of a third structure according to an embodiment of the present application;

[0031] Fig.24 A schematic diagram of an energy storage device having a fourth structure according to an embodiment of the present application;

[0032] Fig.25 This is a schematic diagram of an energy storage device with a fifth structure according to an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1000, battery module; 10, shell; 101, accommodating space; 20, battery cell array; 30, battery cell; 301, pole; 302, first battery cell side wall; 303, second battery cell side wall; 40, total output positive electrode; 50, total output negative electrode; 60, first shell component; 601, first inner cavity; 602, first box body; 603, first box cover; 604, first opening; 70, battery cell group; 80, inter-group connection structure; 801, inter-group connection body; 8011, inter-group connection part; 8012, second intermediate connection part; 802, Battery cell connection body; 8021, battery cell connection part; 8022, first intermediate connection part; 8023, fold; 90, internal connection structure of the group; 901, first internal connection part of the group; 902, second internal connection part of the group; 903, bridge part; 100, support plate; 1001, plug-in part; 110, positioning protrusion; 1101, slot; 120, auxiliary protrusion; 130, heat dissipation layer; 140, heating layer; 150, first fastener; 160, first internal reinforcement rib; 170, second internal reinforcement rib; 180, outer air duct of the box cover; 190, buffer layer;

[0035] 2000, Wall;

[0036] 3000, second shell assembly; 3010, second inner cavity; 3020, second box body; 3030, second box cover; 3040, second fastener; 3050, protrusion structure; 3060, inner air duct; 3070, air inlet; 3080, air outlet; 3090, supporting structure; 3100, bottom gap; 3110, installation space; 3120, groove; 3130, wind guide surface; 3140, wind guide groove; 3150, rain guide surface; 3160, rain guide plate; 3170, hanging structure; 3180, first outer reinforcing rib;

[0037] 4000. Exhaust device; 5000. Controller; 6000. Temperature detection device. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0039] It should be noted that the relative arrangement of the components, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0040] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0042] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] In order to obtain a relatively stable power supply in special circumstances such as unstable power supply, it is necessary to store power when the power supply is stable so that the pre-stored power can be used to power the electrical equipment in the above special circumstances.

[0044] In order to realize electrical energy storage, Figure 1 Some embodiments provide a battery module 1000 , including: a housing 10 having a receiving space 101 , at least two battery cell rows 20 are arranged in the receiving space 101 , and each battery cell row 20 includes a plurality of battery cells 30 .

[0045] Exemplarily, the battery cell 30 is a square shell battery cell 30 .

[0046] Among the multiple battery cells 30, the positive electrode column of one of the battery cells 30 (for example, the battery cell at the head end of the first row) can be used as the total output positive electrode 40 of the battery module 1000, and the negative electrode column of the battery cell 30 is connected with the positive electrode column of the adjacent battery cell 30 to form a series structure. Similarly, the negative electrode column of another battery cell 30 (for example, the battery cell at the tail end of the tail row) among the multiple battery cells 30 can be used as the total output negative electrode 50 of the battery module 1000, and the positive electrode column of the battery cell 30 can be connected with the negative electrode column of the adjacent battery cell 30 to form a series structure. At the same time, the remaining battery cells 30 among the multiple battery cells 30 can also form a series structure.

[0047] The total output positive electrode 40 and the total output negative electrode 50 are respectively connected to external electrical equipment to transmit the electrical energy stored in each battery cell 30 to the external electrical equipment, thereby supplying power to the external electrical equipment.

[0048] Still Figure 1 The structure shown in FIG. 1 is used as an example to illustrate that, in general, the battery cell array 20 includes a battery cell array 20 along the length direction of the housing 10 (eg Figure 1 A plurality of battery cells 30 are arranged in the X1 direction (in the X1 direction), and the thickness direction of the battery cell 30 is parallel to the length direction of the shell 10, which makes the poles 301 of all the battery cells 30 located in the same plane.

[0049] However, the applicant has found that when the above arrangement of the battery cells 30 is adopted, the overall thickness of the battery module 1000 (eg Figure 1 and Figure 2 When the battery module 1000 is hung on the wall 2000, the battery module 1000 will protrude from the wall 2000 by a larger dimension, such as Figure 2 On the one hand, it is easy to collide with passers-by, and on the other hand, its appearance is poor and cannot bring a good user experience to users.

[0050] The applicant has found that the reason why the overall thickness of the battery module 1000 is relatively large is that when the above-mentioned arrangement of the battery cells 30 is adopted, the overall thickness of the battery module 1000 will not be less than the height of the battery cells 30 (e.g. Figure 1 In order to reduce the overall thickness of the battery module 1000, there are at least two ideas: First, reduce the height of the battery cell 30, but the outer dimensions of the battery cell 30 are usually fixed and difficult to change. Second, the arrangement of the battery cell 30 can be changed.

[0051] Combination Figure 1 It can be seen from the structure shown that the width of the battery cell 30 (such as Figure 1 Y1 direction size in the Figure 1 The Z1 dimension in the Figure 1 Among the three dimensions (dimensions in the X1 direction), the thickness dimension is the smallest. Therefore, if the placement direction of the battery cell 30 in the accommodating space 101 is changed, the overall thickness of the battery module 1000 can be reduced.

[0052] In view of this, if Figure 3 and Figure 4 This embodiment provides a battery module 1000, including: a first shell component 60, which is provided with a first inner cavity 601; a plurality of battery cells 30, which are arranged in an array in the first inner cavity 601, and the thickness direction of the battery cells 30 is parallel to the thickness direction of the first shell component 60.

[0053] For example, along the thickness direction of the first housing component 60 (eg Figure 3 In the Z2 direction), a plurality of battery cells 30 are arranged in a single-layer array.

[0054] Combination Figure 4 For example, the thickness direction of the battery cell 30 is parallel to the thickness direction of the first housing component 60 (both directions are similar to Figure 4The thickness of the first housing component 60 is designed according to the thickness of the battery cell 30, and the thickness of the first housing component 60 is approximately the same as the overall thickness of the battery module 1000. In combination with the above content, it can be known that the thickness of the battery cell 30 is relatively small, so compared with the above-mentioned battery module 1000 whose overall thickness is not less than the height of the battery cell 30, the thickness of the battery module 1000 in this embodiment is relatively small.

[0055] like Figure 4 and Figure 5 In some embodiments, at least two battery cell groups 70 arranged at intervals along a first direction are provided in the first inner cavity 601, and each battery cell group 70 includes at least two battery cells 30 arranged and electrically connected along a second direction; the second direction is perpendicular to the first direction; the battery module 1000 includes an inter-group connection structure 80 extending along the first direction, and the head end battery cells 30 located in at least two different battery cell groups 70 are connected through the inter-group connection structure 80, or the tail end battery cells 30 located in at least two different battery cell groups 70 are connected through the inter-group connection structure 80.

[0056] For example, the first direction may be the length direction of the first housing component 60 (eg Figure 4 and Figure 5 The X2 direction in FIG. 1 ) may also be the width direction of the first housing assembly 60 (eg, Figure 4 and Figure 5 Y2 direction in the image).

[0057] Further description is given by taking the first direction as the length direction of the first shell component 60 and the second direction as the width direction of the first shell component 60 as an example.

[0058] For the same battery cell group 70, the poles 301 of all the battery cells 30 face the same direction. Figure 6 , the poles 301 of the battery cells 30 are all facing upwards.

[0059] Of course, for different battery cell groups 70, the directions of the poles 301 may be the same or different. For example, the poles 301 of the battery cells 30 in some battery cell groups 70 face upward, while the poles 301 of the battery cells 30 in other battery cell groups 70 face downward.

[0060] For example, in the same battery cell group 70, for two adjacent battery cells 30, poles 301 of different electrical properties are arranged close to each other. For example, for two adjacent battery cells 30, the positive pole of one battery cell 30 and the negative pole of the other battery cell 30 are close to each other, so that multiple battery cells 30 in the same battery cell group 70 can be connected in series.

[0061] For example, adjacent cells 30 in the same cell group 70 are connected via an intra-group connection structure 90. Figure 6The intra-group connection structure 90 includes a first intra-group connection portion 901, a second intra-group connection portion 902, and a bridge portion 903 respectively connecting the first intra-group connection portion 901 and the second intra-group connection portion 902. The first intra-group connection portion 901 and the second intra-group connection portion 902 are respectively connected to the poles 301 of different electrical properties of two adjacent battery cells 30. For example, in two adjacent battery cells 30, the first intra-group connection portion 901 is connected to the positive pole of one of the battery cells 30, and the second intra-group connection portion 902 is connected to the negative pole of the other battery cell 30.

[0062] Exemplarily, the first group of internal connection parts 901, the bridge part 903 and the second group of internal connection parts 902 are integrally formed structures. Among them, the bridge part 903 is an arc-shaped structure protruding from the surface of the structure. Generally, the first group of internal connection parts 901 and the second group of internal connection parts 902 are connected to the pole 301 of the battery cell 30 through a welding process, which will cause stress to be generated inside the internal connection structure 90. The bridge part 903 with an arc structure can disperse the stress and increase the strength and toughness of the internal connection structure 90.

[0063] For two adjacent battery cell groups 70, when the two adjacent battery cell groups 70 are connected in series, the two head end poles (with Figure 5 Taking the direction in as an example, the electrical properties of the head pole of the battery cell group 70 can be the right pole 301 of the rightmost battery cell 30 of the battery cell group 70) are different. For example, the head pole of one battery cell group 70 is a positive pole, and the head pole of the adjacent battery cell group 70 is a negative pole. Correspondingly, the electrical properties of the two tail poles of the two battery cell groups 70 (similarly, the tail pole of the battery cell group 70 can be the left pole 301 of the leftmost battery cell 30 of the battery cell group 70) are also different.

[0064] When two adjacent battery cell groups 70 are connected in parallel, the electrical properties of the two head-end poles of the two adjacent battery cell groups 70 are the same, for example, both are positive poles. Correspondingly, the electrical properties of the two tail-end poles of the two battery cell groups 70 are also the same.

[0065] It should be noted that if Figure 5 In this embodiment, the poles 301 of different battery cell groups 70 are located in different planes. Specifically, Figure 5 The multiple cell groups 70 are arranged in the longitudinal direction, the poles 301 of the top cell group 70 are located on plane A, and the poles 301 of the next top cell group 70 are located on plane B, and plane A is located above plane B. In order to achieve the connection between the poles 301 located on different planes, the inter-group connection structure 80 needs to extend along the arrangement direction of the cell groups 70, such as Figure 5 In the vertical direction.

[0066] like Figure 4 and Figure 7In some embodiments, the inter-group connection structure 80 includes an inter-group connection portion 8011 and at least two battery cell connection portions 8021 connected to the inter-group connection portion 8011, and the battery cell connection portion 8021 is in contact and connected with the pole 301 of the corresponding battery cell 30; the thickness direction of the inter-group connection portion 8011 is perpendicular to the side wall surface of the battery cell 30.

[0067] Exemplarily, each of the battery cell groups 70 has a head pole and a tail pole connected to a battery cell connection portion 8021 .

[0068] Exemplarily, the cell connection portion 8021 is connected to the pole 301 by welding or by a conductive adhesive.

[0069] Exemplarily, the inter-group connection portion 8011 and the cell connection portion 8021 may be fixedly connected or detachably connected.

[0070] It should be noted that when different battery cell groups 70 are connected in series, one inter-group connection structure 80 can only connect the first-end battery cells of two adjacent battery cell groups 70, such as Figure 5 , at this time, one intergroup connection portion 8011 connects two battery cell connection portions 8021. When different battery cell groups 70 are connected in parallel, one intergroup connection structure 80 can connect the head end batteries of all battery cell groups 70. At this time, one intergroup connection portion 8011 can connect two or more battery cell connection portions 8021.

[0071] In combination with the above content, when the inter-group connection structure 80 connects different battery cell groups 70, the inter-group connection structure 80 will cross the battery cell groups 70. Figure 5 For example, when the inter-group connection structure 80 connects the topmost battery cell group 70 and the second topmost battery cell group 70, it will cross the pole 301 located on the A plane to connect the topmost battery cell group 70 and the pole 301 located on the B plane. When the inter-group connection structure 80 crosses the battery cell group 70 along the thickness direction of the battery cell 30, the thickness dimension of the battery module 1000 will be increased; and when the inter-group connection structure 80 crosses the battery cell group 70 along the width direction of the first shell assembly 60, the width dimension of the battery module 1000 will be increased.

[0072] In order to minimize the increase in the size of the battery module 1000 caused by the inter-group connection structure 80, in this embodiment, the thickness direction of the inter-group connection part 8011 (eg Figure 4 and Figure 5 The Y2 direction in the figure) is perpendicular to the side wall surface of the battery cell 30.

[0073] It can be understood that the position of the inter-group connection part 8011 corresponds to the position of the battery cell 30. At the same time, compared with the width dimension of the inter-group connection part 8011, its thickness dimension is smaller. Therefore, when the thickness direction of the inter-group connection part 8011 is perpendicular to the side wall surface of the battery cell 30, the outer dimensions of the battery module 1000 will only increase the relatively small thickness dimension of the inter-group connection part 8011.

[0074] In combination with the above, during the assembly process of the battery module 1000, when different battery cell groups 70 need to be connected through the inter-group connection structure 80, the different battery cell groups 70 to be connected have been arranged in the first direction. At this time, the pole 301 of the second upper battery cell group 70 faces the bottom of the uppermost battery cell group 70. If the battery cell connection part 8021 and the inter-group connection part 8011 are fixedly connected structures, then when the battery cell connection part 8021 and the pole 301 of the battery cell 30 are connected (for example, welded), a large space that meets the operation requirements needs to be reserved above the pole 301, and there is a large gap between adjacent battery cell groups 70. This will make the capacity density of the battery module 1000 lower.

[0075] In order to avoid the above problems, the cell connection part 8021 and the inter-group connection part 8011 may be designed as a detachable connection structure. Figure 4 and Figure 7 In some embodiments, the inter-group connection structure 80 includes an inter-group connection body 801 and at least two battery cell connection bodies 802; the middle part of each battery cell connection body 802 is bent so that the battery cell connection body 802 is divided into a battery cell connection part 8021 and a first intermediate connection part 8022 by a fold 8023; the inter-group connection body 801 includes an inter-group connection part 8011, and a second intermediate connection part 8012 connected to the inter-group connection part 8011, and the second intermediate connection part 8012 is in one-to-one contact connection with the first intermediate connection part 8022 of the battery cell connection body 802.

[0076] Exemplarily, both the inter-group connection body 801 and the cell connection body 802 are structural members made of conductive plates, such as conductive metal plates or conductive alloy plates.

[0077] Exemplarily, the first intermediate connection part 8022 and the second intermediate connection part 8012 may be contact-connected by welding, fastener connection, conductive adhesive bonding, or the like.

[0078] Exemplarily, the first intermediate connection portion 8022 and the inter-group connection portion 8011 may be located on the same side or on different sides.

[0079] When the first intermediate connection portion 8022 and the inter-group connection portion 8011 are located on the same side, for example, when both are located on one side in the thickness direction of the battery cell 30, Figure 8, or when both are located on one side of the width direction of the battery cell 30, such as Fig. 9 The cell connection part 8021 and the first intermediate connection part 8022 may be perpendicular to each other or at a certain angle. In this case, the inter-group connection body 801 is a flat plate structure as a whole, that is, the inter-group connection part 8011 and the second intermediate connection part 8012 are located in the same plane.

[0080] When the first intermediate connection portion 8022 and the inter-group connection portion 8011 are located on different sides, as shown in FIG. Figure 7 When the first intermediate connection part 8022 is located on one side of the thickness direction of the battery cell 30, and the inter-group connection part 8011 is located on one side of the width direction of the battery cell 30, the battery cell connection part 8021 and the first intermediate connection part 8022 can be perpendicular to each other. At this time, the inter-group connection part 8011 is provided with an extension structure on one side along the width direction, and the root of each extension structure (i.e., the connection with the inter-group connection part 8011) is bent to form a second intermediate connection part 8012 that is in contact with the first intermediate connection part 8022.

[0081] During assembly, the cell connection body 802 can be connected to the corresponding pole 301 in the cell group 70 before the cell group 70 is arranged. After that, the different cell groups 70 to be connected are arranged in the first direction. Since the first intermediate connection part 8022 and the cell connection part 8021 are not in the same plane, the contact connection plane of the first intermediate connection part 8022 and the second intermediate connection part 8012 is no longer located above the cell group 70, but is located in the side wall direction of the cell group 70. In other words, it is only necessary to reserve operating space in the side wall direction of the cell group 70, and the interval between adjacent cell groups 70 can be reduced to increase the energy density of the battery module 1000.

[0082] like Figure 4 , Figure 5 and Figure 7 As shown, in some embodiments, the first shell assembly 60 includes a first box body 602, and the side wall of the first box body 602 in the thickness direction is provided with a first opening 604, and the first opening 604 is connected to the first inner cavity 601 in the first box body 602; the surface of the first intermediate connection part 8022 faces the first opening 604, and the first intermediate connection part 8022 and the second intermediate connection part 8012 are connected by fasteners; along the second direction, the inter-group connection part 8011 is arranged on one side of the end of the battery cell group 70.

[0083] like Figure 4 The first opening 604 is disposed on a side wall of a larger area in the first box body 602 .

[0084] Exemplarily, the fastener may be a stud and a nut. The stud may be connected to the first intermediate connection part 8022 by welding or riveting, and the second intermediate connection part 8012 may be provided with a through hole. The second intermediate connection part 8012 may be mounted on the stud through the through hole, and the first intermediate connection part 8022 and the second intermediate connection part 8012 may be brought into abutment with each other through a nut threadedly connected to the stud.

[0085] Exemplarily, the stud protrudes from a surface of the first intermediate connecting portion 8022 facing the first opening 604 , and an axis of the stud may be perpendicular to the surface of the first intermediate connecting portion 8022 .

[0086] The surface of the first intermediate connecting part 8022 faces the first opening 604. Therefore, when assembling the first intermediate connecting part 8022 and the second intermediate connecting part 8012, the operator can perform assembly operations at the first opening 604, which can minimize the space reserved for the assembly process in the first inner cavity 601, and help reduce the overall volume of the first shell assembly 60, so that the overall structure of the battery module 1000 is more compact and beautiful.

[0087] At the same time, Figure 5 and Figure 7 Taking the structure shown as an example, the inter-group connection portion 8011 is arranged on one side of the end of the battery cell group 70 along the second direction, that is, the inter-group connection portion 8011 is arranged on the outside of the battery cell group 70 along the width direction of the first box body 602, which can avoid the inter-group connection body 801 occupying the space in the thickness direction of the first box body 602, help to reduce the thickness of the first box body 602, and further reduce the overall volume of the first shell assembly 60.

[0088] It should be noted that the inter-group connection body 801 is insulated from the first box body 602 . For example, an insulating layer (such as a plastic package) may be provided around the inter-group connection portion 8011 or the inter-group connection portion 8011 may be spaced apart from the first box body 602 .

[0089] Exemplarily, a support plate 100 protruding from the surface of the first inner cavity 601 is provided on the side wall of the first box body 602 away from the first opening 604, and the support plate 100 is provided in a one-to-one correspondence with the battery cell group 70. The support plate 100 is used to support the battery cell group 70 in the first inner cavity 601. Figure 4 .

[0090] In the above structure, all the cell groups 70 are first placed in the first inner cavity 601 (ie, all the cell groups 70 are first placed on corresponding support plates 100 ), and then the adjacent cell groups 70 in the first inner cavity 601 are electrically connected.

[0091] The applicant has found that if the process steps of placing the battery cell groups 70 one by one into the first inner cavity 601 and connecting them are adopted, the inter-group connection structure 80 can also be simplified. Specifically, the process steps are: first electrically connect the newly placed battery cell group 70 with the battery cell group 70 in the original first inner cavity 601, and after the connection is completed, place a new battery cell group 70 and repeat until all the battery cell groups 70 are assembled. In this way, when assembling the intermediate battery cell group 70, the space used to set the subsequent battery cell group 70 can be used to assemble the current battery cell group 70, so it can also avoid reserving a large space for assembly in the first inner cavity 601.

[0092] In order to realize the above process steps, Figure 5 and Fig.10 As shown, in some embodiments, each battery cell group 70 further includes a support plate 100 for supporting the bottom of the battery cell 30, and the support plate 100 is detachably connected to the first box body 602; the inter-group connection portion 8011 and the battery cell connection portion 8021 are integrally formed.

[0093] Exemplarily, the first box body 602 and the support plate 100 can be detachably connected by plugging, snapping or screwing.

[0094] The battery cells 30 included in the same battery cell group 70 can be placed on the corresponding support plate 100 first, and the multiple battery cells 30 are connected in series through the intra-group connection structure 90. At this time, the multiple battery cells 30 and the support plate 100 can form an integral battery cell group 70 outside the first inner cavity 601.

[0095] First, a battery cell group 70 is placed in the first inner cavity 601, and the support plate 100 of the battery cell group 70 is connected to the first box body 602. After that, one of the battery cell connection parts 8021 of the integrally formed inter-group connection structure 80 (including the inter-group connection part 8011 and the battery cell connection part 8021) is fixedly connected to the end pole of the battery cell group 70. After the connection is completed, a new battery cell group 70 is placed in the first inner cavity 601 again, and the end pole of the newly placed battery cell group 70 is connected to the other battery cell connection part 8021 of the inter-group connection structure 80. At this time, the newly placed battery cell group 70 completes the electrical connection with the first battery cell group 70 placed in the first inner cavity 601.

[0096] like Fig.10 As shown, in some embodiments, the side wall of the first box body 602 along the second direction is provided with a positioning protrusion 110 protruding from the surface of the first inner cavity 601, the positioning protrusion 110 is used to support the support plate 100, and the support plate 100 is detachably connected to the positioning protrusion 110.

[0097] like Fig.11, the second direction is taken as the width direction of the first box body 602. Positioning protrusions 110 are provided on the left and right side walls of the first box body 602, the support plate 100 is placed above the positioning protrusions 110, and the two ends of the support plate 100 are respectively abutted against two positioning protrusions 110 of the same height, and the two positioning protrusions 110 can support the support plate 100, so that the support plate 100 and the battery cell 30 placed on the support plate 100 are kept in a preset position.

[0098] like Fig.11 , Fig.12 and Fig.13 As shown, in some embodiments, the positioning protrusion 110 is provided with a slot 1101 , and the end of the support plate 100 is provided with an inserting portion 1001 . When the support plate 100 is connected to the positioning protrusion 110 , the inserting portion 1001 is inserted into the positioning protrusion 110 through the slot 1101 .

[0099] Exemplarily, the slot 1101 is disposed at the top of the positioning protrusion 110, and correspondingly, the plug-in portion 1001 is disposed at the bottom of the support plate 100. Fig.12 .

[0100] Exemplarily, the slot 1101 is disposed on the side wall of the positioning protrusion 110 facing the first inner cavity 601, and accordingly, the end of the support plate 100 serves as the plug-in portion 1001. Fig.13 .

[0101] Compared with the surface contact between the positioning protrusion 110 and the support plate 100, in the present embodiment, the support plate 100 and the positioning protrusion 110 are plugged into each other by means of a slot 1101 provided on the positioning protrusion 110 and a plug-in portion 1001 provided on the support plate 100, which helps to achieve a more stable connection between the two and ensures that the battery cell group 70 can be reliably placed in the first inner cavity 601 of the first shell assembly 60.

[0102] like Fig.10 As shown, in some embodiments, the side wall of the first box body 602 away from the first opening 604 is provided with an auxiliary protrusion 120 protruding from the surface of the first inner cavity 601 , and the auxiliary protrusion 120 is used to support the middle part of the support plate 100 .

[0103] When the length of the support plate 100 is long, the middle part thereof may tend to bend downward after supporting the battery cell 30 due to the weight of the battery cell 30. The auxiliary protrusion 120 can support the middle part of the support plate 100 to prevent the middle part of the support plate 100 from bending downward, thereby ensuring that the battery cell group 70 is stably placed in the first housing assembly 60.

[0104] It is understandable that the battery cell 30 has a certain operating temperature, that is, it can work normally only when it is kept within a predetermined temperature range. Otherwise, the electrical performance of the battery cell 30 may be reduced at best, or the battery cell 30 may suffer from thermal runaway at worst.

[0105] In order to maintain the temperature of the battery cell 30 of the battery module 1000 at a normal level, a heating layer 140 and a heat dissipation layer 130 are usually provided on the surface of the battery cell 30. Figure 4 The heating layer 140 can heat the battery cell 30 when the temperature of the battery cell 30 is low. The heat dissipation layer 130 can transfer the heat of the battery cell 30 to the first shell component 60 when the temperature of the battery cell 30 is high, and perform heat exchange with the outside through the first shell component 60 to achieve heat dissipation.

[0106] However, whether heating or cooling the battery cell 30, it needs to be in contact with the surface of the battery cell 30. At the same time, the contact area between the heating layer 140 and the surface of the battery cell 30 is strongly related to the heating performance of the battery module 1000; similarly, the contact area between the heat dissipation layer 130 and the surface of the battery cell 30 is also strongly related to the heat dissipation performance of the battery module 1000. Therefore, the heating layer 140 and the heat dissipation layer 130 are more reasonably arranged on the surface of the battery cell 30 to ensure that the battery module 1000 has both good heating and heat dissipation effects.

[0107] like Figure 4 and Figure 7 As shown, in some embodiments, the battery cell 30 includes a first battery cell side wall 302 along the thickness direction and a second battery cell side wall 303 along the width direction, and the area of ​​the first battery cell side wall 302 is larger than the area of ​​the second battery cell side wall 303; the heat dissipation layer 130 is arranged on the first battery cell side wall 302; and the heating layer 140 is at least arranged on the second battery cell side wall 303.

[0108] Exemplarily, the heat dissipation layer 130 may be a structural layer formed by a thermally conductive adhesive.

[0109] Exemplarily, the heating layer 140 may include electric heating wires.

[0110] Exemplarily, the heating layer 140 may be connected to the battery core 30 via a thermally conductive adhesive.

[0111] First, the heat dissipation layer 130 needs to be in contact with not only the surface of the battery cell 30 but also the first shell assembly 60, so as to transfer the heat of the battery cell 30 to the first shell assembly 60, and then perform heat exchange with the environment outside the battery module 1000. In the battery module 1000 of this embodiment, all the first battery cell side walls 302 are close to the first shell assembly 60, so the heat dissipation layer 130 is more suitable to be arranged on the first battery cell side wall 302. At the same time, combined with the above content, it can be known that when the heat dissipation layer 130 is arranged on the first battery cell side wall 302, the side wall of the first shell assembly 60 with a larger area is connected to the heat dissipation layer 130, which helps to improve the heat dissipation efficiency of the battery module 1000.

[0112] As for the heating layer 140, it can heat the battery cell 30 by only contacting the surface of the battery cell 30. At the same time, compared with the heat dissipation layer 130, the heating layer 140 has a higher efficiency, so even if the heating layer 140 is set on the second battery cell side wall 303 with a smaller area, it can also meet the heating demand of the battery cell 30.

[0113] In addition, it is understandable that heat will also be generated during the operation of the battery cell 30, that is, the heat source in the battery module 1000 is not just the heating layer 140, and the working battery cell 30 can also serve as an auxiliary heat source. Therefore, the heating layer 140 is set on the second battery cell side wall 303 with a smaller area, and it is more reasonable to use the first battery cell side wall 302 with a larger area to set the heat dissipation layer 130, which can meet the heating and heat dissipation needs of the battery cell 30 at the same time.

[0114] like Figure 5 and Figure 6 As shown, in some embodiments, in the battery cell group 70 , the heating layer 140 disposed between two adjacent battery cells 30 is simultaneously connected to the second battery cell side walls 303 of the two adjacent battery cells 30 .

[0115] The heating layer 140 disposed between two battery cells 30 can heat two adjacent battery cells 30 at the same time, greatly improving the heating efficiency of the heating layer 140. At the same time, since both sides of the heating layer 140 are connected to the battery cells 30, the exposed surface area of ​​the heating layer 140 is small, and most of the heat provided by the heating layer 140 is transferred to the battery cells 30, which can reduce heat energy waste.

[0116] like Figure 7 As shown, in some embodiments, the heating layer 140 is also disposed at the bottom of the battery cell 30 .

[0117] In combination with the above, since the bottom of the battery cell 30 will contact the support plate 100, and the support plate 100 is connected to the first shell assembly 60, if the heating layer 140 is only provided on the second battery cell side wall 303, the temperature of the side wall of the battery cell 30 may be higher but the temperature of the bottom is lower, resulting in uneven temperature of the battery cell 30. In order to avoid the above problem, the heating layer 140 can also be provided on the bottom of the battery cell 30. The heating layer 140 provided on the bottom of the battery cell 30 can heat the bottom of the battery cell 30, which helps to ensure that the temperature of various parts of the battery cell 30 is relatively uniform during the heating process.

[0118] like Figure 7 As shown, in some embodiments, the heating layer 140 disposed at the bottom of the battery cell 30 is connected to at least one heating layer 140 disposed on the second battery cell side wall 303 .

[0119] Exemplarily, when the heating layer 140 disposed at the bottom of the battery cell 30 is connected to a heating layer 140 disposed on the second battery cell side wall 303 , the two form an L-shaped structure.

[0120] Exemplarily, when the heating layer 140 disposed at the bottom of the battery cell 30 is connected to the two heating layers 140 disposed on the second battery cell side walls 303 , the three form a U-shaped structure.

[0121] The heating layer 140 disposed at the bottom of the battery cell 30 and the heating layer 140 disposed at the second battery cell side wall 303 are designed as a connection structure. When one of the heating layers 140 is aligned and connected to the corresponding position of the battery cell 30, the other heating layer 140 can be directly connected without alignment, which helps to simplify the assembly process and reduce the difficulty of the assembly process. For example, when the heating layer 140 is aligned and connected to the bottom of the battery cell 30, the heating layer 140 and the second battery cell side wall 303 are also aligned and can be directly connected.

[0122] like Figure 7 As shown, in some embodiments, a buffer layer 190 is disposed on at least one side of the heating layer 140 .

[0123] Exemplarily, the buffer layer 190 may be a foam layer or other flexible material layer.

[0124] Exemplarily, the buffer layer 190 may be disposed on both sides of the heating layer 140 .

[0125] Exemplarily, the buffer layer 190 may be adhesively connected to the surface of the battery cell 30 .

[0126] Since the heating layer 140 has strong impact resistance and extrusion resistance, the buffer layer 190 and the heating layer 140 can be integrated together, which can make the structure of the battery module 1000 more simple and compact on the one hand, and also help to simplify the assembly process on the other hand.

[0127] like Figure 4 and Figure 5 As shown, in some embodiments, the heat dissipation layer 130 is thermally connected to the first battery cell side wall 302 and the first shell assembly 60 respectively.

[0128] The heat dissipation layer 130 can transfer the heat of the battery core 30 to the first housing assembly 60 , and achieve a heat dissipation effect by exchanging heat with the outside through the first housing assembly 60 .

[0129] In combination with the above content, it can be known that the side wall of the first box body 602 of the first shell assembly 60 has a relatively large area in the thickness direction. Generally, the first box body 602 is made of a plate with a smaller thickness, so the plate with a larger area is weaker in strength, and the middle part may be deformed in an alternating hot and cold environment. On the one hand, it may affect the appearance and user experience of the battery module 1000; on the other hand, it may also cause the heat dissipation layer 130 and the first box body 602 to separate, affecting the heat dissipation effect of the battery module 1000.

[0130] In view of this, if Figure 4 As shown, in some embodiments, the first shell assembly 60 includes a first box body 602 and a first box cover 603 that are detachably connected, and a support plate 100 is arranged in the first inner cavity 601 and is used to support the battery cell 30, and at least one side wall of the support plate 100 is fixedly connected to the side wall of the first inner cavity 601; the first fastener 150, when the first box cover 603 and the first box body 602 are connected, the first fastener 150 passes through the first box cover 603 and is connected to the support plate 100.

[0131] For example, the first fastener 150 may be a screw.

[0132] Exemplarily, the support plate 100 may be connected to the side wall of the first inner cavity 601 by welding, or by snap-fitting, or by fasteners such as screws.

[0133] When the support plate 100 is fixedly connected to the side wall of the first inner cavity 601, the support plate 100 can serve as a reinforcing rib of the first box body 602 to improve the strength of the side wall of the first box body 602. At the same time, the first box cover 603 is connected to the support plate 100 through the first fastener 150, so that the positions of the first box cover 603, the first box body 602 and the support plate 100 can be fixed, and the support plate 100 can also be used to improve the strength of the first box cover 603. Therefore, in this embodiment, since the support plate 100 is connected to the first box body 602 and the first box cover 603 at the same time, the support plate 100 can serve as a reinforcing rib of the first box body 602 and the first box cover 603 at the same time, so as to improve the strength of both.

[0134] like Figure 4As shown, in some embodiments, the side walls of the support plate 100 except the side wall facing the first opening 604 are fixedly connected to the side walls of the first inner cavity 601 .

[0135] The three side walls of the support plate 100 are respectively connected to the side walls of the first inner cavity 601. On the one hand, the support plate 100 can strengthen the side walls of the three first inner cavities 601 respectively. On the other hand, the side walls of the three first inner cavities 601 can be formed as a whole by the support plate 100, so that the overall strength of the first box body 602 is improved.

[0136] like Figure 4 As shown, in some embodiments, an auxiliary protrusion 120 is provided at the bottom of the support plate 100 , and the auxiliary protrusion 120 is connected to the first box body 602 . When the first box cover 603 and the first box body 602 are connected, the first fastener 150 is connected to the auxiliary protrusion 120 .

[0137] Exemplarily, the auxiliary protrusion 120 may be connected to the first box body 602 by means of fasteners such as welding, clamping or screws.

[0138] The auxiliary protrusion 120 can support the pallet 100 on one hand, and on the other hand, the auxiliary protrusion 120 can increase the connection area between the pallet 100 and the first box body 602, so as to make the connection between the pallet 100 and the first box body 602 more reliable. At the same time, the auxiliary protrusion 120 can have a larger side wall area than the pallet 100, which can provide a stronger connection foundation for the first fastener 150, and help ensure that the first box cover 603 and the first box body 602 are more stable and reliable when connected.

[0139] like Figure 4 As shown, in some embodiments, at least two auxiliary protrusions 120 are arranged at intervals along the length direction of the support plate 100 .

[0140] Providing at least two auxiliary protrusions 120 can further improve the connection reliability between the support plate 100 and the first box body 602, and the connection reliability between the first box cover 603 and the first box body 602 during connection.

[0141] like Figure 4 and Fig.14 As shown, in some embodiments, a first inner reinforcing rib 160 is provided on a side of the first box cover 603 close to the first box body 602, and a second inner reinforcing rib 170 is provided on a side of the first box cover 603 away from the first box body 602, and the first inner reinforcing rib 160 and the second inner reinforcing rib 170 are spatially intertwined.

[0142] Exemplarily, the first inner reinforcing rib 160 and the second inner reinforcing rib 170 are vertical in space.

[0143] Exemplarily, the first inner reinforcing ribs 160 extend along the width direction of the first shell assembly 60 , and a plurality of the first inner reinforcing ribs 160 are arranged at intervals along the length direction of the first shell assembly 60 .

[0144] Exemplarily, the second inner reinforcement ribs 170 extend along the length direction of the first housing assembly 60 , and a plurality of the second inner reinforcement ribs 170 are arranged at intervals along the width direction of the first housing assembly 60 .

[0145] The first inner reinforcing rib 160 and the second inner reinforcing rib 170 intersect in space, and can strengthen the strength of the first box cover 603 from different directions on the surface of the first box cover 603. At the same time, the first inner reinforcing rib 160 and the second inner reinforcing rib 170 are respectively arranged on both sides of the first box cover 603, so that the first inner reinforcing rib 160 and the second inner reinforcing rib 170 can be formed by processing a whole profile or plate, without cutting and splicing processes due to the intersection, which can reduce the processing difficulty of the first shell component 60.

[0146] Based on the same inventive concept and in combination with the description of the battery module 1000 described in the above embodiments, this embodiment provides an energy storage device having the corresponding technical effects of the battery module 1000 described in the above embodiments, which will not be described in detail herein.

[0147] An energy storage device includes the battery module 1000 as described in the above embodiments.

[0148] In combination with the above content, it can be known that the battery module 1000 can transfer its internal heat to the first housing assembly 60 through the heat dissipation layer 130, and then the first housing assembly 60 performs heat exchange with the outside to achieve the effect of heat dissipation of the battery module 1000. Therefore, in order to improve the heat dissipation effect of the battery module 1000, it is necessary to improve the heat exchange efficiency between the first housing assembly 60 and the outside.

[0149] The applicant has found that improving the heat exchange efficiency between the first shell component 60 and the outside world includes at least the following ideas:

[0150] One is to lower the external ambient temperature, but this method is costly.

[0151] Secondly, the contact area between the first shell component 60 and the flowing heat exchange medium (such as air or coolant) is increased.

[0152] Thirdly, the heat transfer structural parts between the first shell component 60 and the flowing heat exchange medium are reduced or even eliminated, so as to make the first shell component 60 and the flowing heat exchange medium in direct contact as much as possible.

[0153] Fourth, the flow velocity of the flowing heat exchange medium is increased.

[0154] In view of this, if Figure 5and Fig.15 As shown, in some embodiments, an energy storage device is provided, including: a battery module 1000, including a first shell component 60 provided with a first inner cavity 601, and a plurality of battery cells 30 are provided in the first inner cavity 601; a second shell component 3000, provided with a second inner cavity 3010, the battery module 1000 is arranged in the second inner cavity 3010, the second shell component 3000 is provided with a protruding structure 3050 protruding from the surface of the second inner cavity 3010, and at least two protruding structures 3050 are arranged at intervals; the top of the protruding structure 3050 is abutted against the outer surface of the first shell component 60, and the outer surface of the first shell component 60, the surface of the second inner cavity 3010 and the facing side walls of two adjacent protruding structures 3050 are surrounded to form an inner air duct 3060; the second shell component 3000 is provided with an air inlet 3070 and an air outlet 3080 connecting the inner air duct 3060 and the outside.

[0155] Exemplarily, one, two or more air inlets 3070 are provided.

[0156] Exemplarily, the number of air outlets 3080 is one, two, or more.

[0157] The protruding structure 3050 protrudes from the surface of the second inner cavity 3010, and can form a strip-shaped retaining wall structure in the second inner cavity 3010. Fig.17 The angle shown can be intuitively understood as that, among the two adjacent protrusion structures 3050, the right side wall of the left protrusion structure 3050, the left side wall of the right protrusion structure 3050, and the surface of the second inner cavity 3010 can form a U-shaped structure. After the first shell component 60 is placed in the second inner cavity 3010, the outer surface of the first shell component 60 abuts against the top of the protrusion structure 3050, and the top opening of the U-shaped structure is blocked by the outer surface of the first shell component 60, forming a relatively closed pipeline structure, namely, the inner air duct 3060.

[0158] The inner air duct 3060 is connected with the air inlet 3070 and the air outlet 3080, so the low-temperature air as the flowing heat exchange medium entering from the air inlet 3070 will enter the inner air duct 3060, and perform heat exchange with the first shell assembly 60 in the inner air duct 3060, and finally be discharged from the second shell assembly 3000 through the air outlet 3080. In combination with the foregoing, the outer surface of the first shell assembly 60 forms a side wall of the inner air duct 3060, so the flowing heat exchange medium in the inner air duct 3060 can directly contact the outer surface of the first shell assembly 60, which helps to improve the heat exchange efficiency of the battery module 1000.

[0159] At the same time, in addition to being used to form the internal air duct 3060, the protruding structure 3050 can also be used to improve the structural strength of the plate surface where the protruding structure 3050 is located, as a reinforcing rib in the second shell assembly 3000, because it protrudes from the surface of the second inner cavity 3010.

[0160] like Fig.15 , Fig.16 and Fig.17 As shown, in some embodiments, the air outlet 3080 and the air inlet 3070 are arranged at intervals along a first direction, and a plurality of protruding structures 3050 are arranged at intervals along a second direction perpendicular to the first direction to form at least two inner air ducts 3060 extending along the first direction.

[0161] Exemplarily, the first direction may be parallel to the length direction of the second housing assembly 3000 , and correspondingly, the second direction is parallel to the width direction of the second housing assembly 3000 .

[0162] Exemplarily, the first direction may be parallel to the width direction of the second housing assembly 3000 , and correspondingly, the second direction is parallel to the length direction of the second housing assembly 3000 .

[0163] Exemplarily, the protruding structure 3050 is a strip-shaped structure extending along the first direction.

[0164] exist Fig.16 In the structure shown, the air outlet 3080 and the air inlet 3070 are arranged along the length direction of the second shell assembly 3000 .

[0165] In this embodiment, the extension direction of the inner air duct 3060 is the same as the setting direction of the air outlet 3080 and the air inlet 3070. In other words, the air outlet 3080 is close to one end of the inner air duct 3060, and the air inlet 3070 is close to the other end of the inner air duct 3060. Then, after the air as the flowing heat exchange medium enters the second inner cavity 3010 through the air inlet 3070, it only needs to flow a short distance to enter the inner air duct 3060. Similarly, after the air flows out of the inner air duct 3060, it only needs to flow a short distance to be discharged from the second shell assembly 3000 through the air outlet 3080. Since the process of heat exchange between air and the battery module 1000 is mainly carried out in the inner air duct 3060, the present application helps to reduce the path of air flowing in the second inner cavity 3010 except the inner air duct 3060, thereby improving the heat dissipation efficiency of the energy storage device.

[0166] like Fig.16 As shown, in some embodiments, the second shell assembly 3000 is connected to an exhaust device 4000 at the air outlet 3080 ; the energy storage device also includes a controller 5000 connected to the exhaust device 4000 and used to control the exhaust device 4000 .

[0167] Exemplarily, the exhaust device 4000 may be an exhaust fan or a vacuum exhaust device.

[0168] Exemplarily, the exhaust device 4000 may be connected to a portion of the second housing assembly 3000 close to the air outlet 3080 via an adhesive layer or fasteners such as screws.

[0169] Exemplarily, the controller 5000 may be a control chip or a control circuit board.

[0170] Exemplarily, the controller 5000 can control the opening and closing of the exhaust device 4000.

[0171] For example, the controller 5000 can control the opening, closing and output (such as the rotation speed or negative pressure value) of the exhaust device 4000.

[0172] Exemplarily, the exhaust device 4000 and the controller 5000 may be electrically connected via wired or wireless means, so that the controller 5000 can send a control instruction to the exhaust device 4000 to control the exhaust device 4000 to be turned on or off.

[0173] The controller 5000 can receive control information sent by the user. According to the control information, the controller 5000 can generate corresponding control instructions and send them to the exhaust device 4000. The exhaust device 4000 performs actions such as opening or closing according to the received control instructions.

[0174] The exhaust device 4000 is an exhaust fan as an example for explanation. When the exhaust fan is turned on, the speed at which air is discharged from the second inner cavity 3010 through the air outlet 3080 to the outside can be accelerated, so that the air in the second inner cavity 3010 can flow quickly, thereby improving the heat dissipation efficiency of the energy storage device. When the exhaust fan is turned off, the flow speed of the air in the second inner cavity 3010 decreases, which helps to keep the energy storage device warm and reduce the energy consumption of the energy storage device itself.

[0175] Of course, when the controller 5000 can adjust the speed of the exhaust fan, the controller 5000 can also control the exhaust fan to perform an adjustment action according to the exhaust fan speed contained in the control information sent by the user, so as to control the air flow speed in the second inner cavity 3010, thereby adjusting the heat dissipation efficiency of the energy storage device.

[0176] It should also be noted that when the heating layer 140 includes a heating wire, the controller 5000 can also be connected to the heating wire in the heating layer 140 to control the start of heating, the end of heating or the heating temperature of the heating layer 140. The specific control method is similar to the controller 5000 controlling the exhaust device 4000, which will not be repeated here.

[0177] like Fig.16As shown, in some embodiments, the energy storage device also includes a temperature detection device 6000, which is arranged in the inner air duct 3060, and the temperature detection device 6000 is used to detect and send the ambient temperature in the inner air duct 3060; the controller 5000 is connected to the temperature detection device 6000, and the controller 5000 is used to receive the ambient temperature and control the output of the exhaust device 4000 according to the ambient temperature to adjust the air flow speed in the inner air duct 3060.

[0178] Exemplarily, the temperature detection device 6000 may be a temperature sensor, or a device including a thermocouple, or a device including a thermal resistor, etc.

[0179] Exemplarily, the temperature detection device 6000 and the controller 5000 may be electrically connected in a wired or wireless manner, so that the temperature detection device 6000 can send the detected ambient temperature to the controller 5000 .

[0180] The temperature detection device 6000 can monitor the ambient temperature in the inner air duct 3060 in real time and send the current ambient temperature to the controller 5000. The controller 5000 can automatically generate a control instruction based on the received ambient temperature and send it to the exhaust device 4000. The exhaust device 4000 performs actions such as opening or closing according to the received control instruction.

[0181] like Fig.17 , Fig.18 and Fig.19 As shown, in some embodiments, the top of the protruding structure 3050 is airtightly connected to the outer surface of the first shell assembly 60, and adjacent internal air ducts 3060 are not connected to each other; the air outlets 3080 and the internal air ducts 3060 are arranged in a one-to-one correspondence, and the second shell assembly 3000 is connected to an exhaust device 4000 at each air outlet 3080.

[0182] Exemplarily, a sealing gasket, an adhesive layer may be provided between the top of the protruding structure 3050 and the first shell assembly 60, or a plane with a certain width (dimension along the second direction) abutting against the outer surface of the first shell assembly 60 may be provided on the top of the protruding structure 3050 to achieve an airtight connection between the top of the protruding structure 3050 and the outer surface of the first shell assembly 60.

[0183] Combination Fig.17 and Fig.19 It can be seen that the second housing assembly 3000 is provided with five protruding structures 3050, which can form four inner air ducts 3060 extending along the length direction of the second housing assembly 3000. Accordingly, the second housing assembly 3000 is provided with four air outlets 3080, and each air outlet 3080 is installed with an exhaust device 4000.

[0184] The controller 5000 can control the four exhaust devices 4000 to perform the same action, so that when the four exhaust devices 4000 are turned on, the flow speed of the air in the second inner cavity 3010 can be greatly increased.

[0185] Combination Fig.16 , Fig.17 and Fig.19 It can also be seen that the four inner air ducts 3060 include two inner air ducts 3060 located in the middle (hereinafter referred to as the middle inner air ducts), and two inner air ducts 3060 near the edges of the battery module 1000 (hereinafter referred to as the edge inner air ducts). The two middle inner air ducts correspond to the middle area of ​​the battery module 1000, while the two edge inner air ducts correspond to the area near the edge of the battery module 1000. It can be understood that when the battery module 1000 is working, the temperature of the middle area is usually higher than the temperature of the area near the edge, so the temperature and heat exchange requirements in the four inner air ducts 3060 are also different.

[0186] In this embodiment, since adjacent inner air ducts 3060 are not connected to each other, the air flow speed in each inner air duct 3060 can be different, providing a basis for individually adjusting the air flow speed in each inner air duct 3060.

[0187] When the controller 5000 is capable of controlling each exhaust device 4000 individually, the air flow speed in the inner air duct 3060 (e.g., the middle inner air duct) with a higher heat exchange requirement can be faster, while the air flow speed in the inner air duct 3060 (e.g., the edge inner air duct) with a lower heat exchange requirement can be slower. In this way, it is easier to make the temperatures of various parts of the battery module 1000 tend to be consistent.

[0188] Regarding the control method of the controller 5000, specifically, in some embodiments, a temperature detection device 6000 is provided in each inner air duct 3060; the controller 5000 is used to receive the ambient temperatures respectively sent by at least two temperature detection devices 6000, and determine the target inner air duct according to the at least two ambient temperatures; the controller 5000 is also used to separately adjust the output of the exhaust device 4000 corresponding to the target inner air duct.

[0189] Still Fig.16 and Fig.17The structure shown in the figure is used as an example for further explanation. The controller 5000 may receive only the ambient temperature sent by two temperature detection devices 6000 (for example, one middle inner air duct and one edge inner air duct of the four inner air ducts 3060, because the four inner air ducts 3060 are symmetrically arranged relative to the battery module 1000, the temperatures in the two middle inner air ducts are roughly the same, and the temperatures in the two edge inner air ducts are also roughly the same). Alternatively, the controller 5000 may receive the ambient temperature sent by all four temperature detection devices 6000.

[0190] Taking the controller 5000 receiving two ambient temperatures as an example, when one of the two ambient temperatures received by the controller 5000 is greater than a preset threshold, the controller 5000 may determine the inner air duct 3060 corresponding to the ambient temperature as the target inner air duct, and start the exhaust device 4000 corresponding to the target inner air duct to speed up the air flow speed in the target inner air duct. If the other of the two ambient temperatures is not greater than the preset threshold, the controller 5000 may not send a control instruction to the corresponding exhaust device 4000, so that the exhaust device 4000 maintains the current state.

[0191] like Fig. 20 As shown, in some embodiments, an end of the protruding structure 3050 extends out of an edge of the first housing component 60 along a first direction.

[0192] Since the protruding structure 3050 is used to form the inner air duct 3060, when the end of the protruding structure 3050 extends out of the edge of the first shell assembly 60, the inner air duct 3060 can completely cover the battery module 1000 along the first direction, which helps to improve the heat dissipation capacity of the energy storage device.

[0193] like Fig.16 and Fig.17 As shown, in some embodiments, the second housing assembly 3000 includes a second box body 3020 , the protruding structure 3050 is disposed on a side wall of the second box body 3020 , and the protruding structure 3050 abuts against the side wall of the first housing assembly 60 along the thickness direction.

[0194] In combination with the above content, it can be known that the side wall of the first shell component 60 in the thickness direction is the side wall with a larger format of the first shell component 60, and all the battery cells 30 in the first shell component 60 can be thermally connected to the side wall. Therefore, when the protruding structure 3050 abuts against the side wall of the first shell component 60, the internal air duct 3060 of the energy storage device can cover all the battery cells 30 in the battery module 1000 to the greatest extent, which can improve the heat dissipation efficiency of the energy storage device on the one hand, and on the other hand, it also helps to ensure that the temperature of each part of the battery module 1000 is relatively uniform.

[0195] like Fig.16 , Fig.17 , Fig. 20 and Fig.21 As shown, in some embodiments, the bottom of the second box body 3020 is provided with at least two support structures 3090 protruding from the surface of the second inner cavity 3010, and the support structure 3090 abuts against the bottom of the battery module 1000 to form a bottom gap 3100 between the bottom outer surface of the first shell assembly 60 and the surface of the second inner cavity 3010, and the air inlet 3070 is arranged at the bottom of the second box body 3020, and the air inlet 3070 and the internal air duct 3060 are connected through the bottom gap 3100.

[0196] Exemplarily, the support structure 3090 may be a columnar structure, a block structure, an I-shaped structure, a gate-shaped structure, or the like.

[0197] The support structure 3090 is used to support the bottom of the battery module 1000, so that a bottom gap 3100 for air flow is formed between the bottom of the first housing assembly 60 and the inner bottom of the second box body 3020. When the outside air enters the second inner cavity 3010 through the air inlet 3070, it first enters the bottom gap 3100, and then enters the inner air duct 3060 through the bottom gap 3100 to exchange heat with the battery module 1000.

[0198] like Fig.16 As shown, in some embodiments, a plurality of air inlets 3070 are arranged at intervals along the second direction at the bottom of the second box body 3020 , and the support structure 3090 is arranged between two adjacent air inlets 3070 .

[0199] Exemplarily, the air inlet 3070 may be a circular hole, an elliptical hole, a polygonal hole, a semicircular hole, or a waist-shaped hole.

[0200] The support structure 3090 and the air inlet 3070 are staggered to ensure that air can smoothly enter the second inner cavity 3010 from the air inlet 3070. This can prevent the support structure 3090 from blocking the air inlet 3070 and hindering the air flow.

[0201] like Fig.16 , Fig.17 , Fig.18 and Fig. 20 As shown, in some embodiments, the air outlet 3080 and the protruding structure 3050 are both arranged on the side wall of the second box body 3020 in the thickness direction, an installation space 3110 is arranged between the top outer surface of the first shell assembly 60 and the surface of the second inner cavity 3010, the air outlet 3080 and the inner air duct 3060 are connected through the installation space 3110, and the exhaust device 4000 is arranged in the installation space 3110.

[0202] Exemplarily, the controller 5000 may also be disposed in the installation space 3110 .

[0203] The thickness directions of the first housing component 60 and the second box body 3020 are parallel. In combination with the above content, the protruding structure 3050 needs to abut against the side wall in the thickness direction of the first housing component 60, so the protruding structure 3050 is also arranged on the side wall in the thickness direction of the second box body 3020. At the same time, the air outlet 3080 is close to the inner air duct 3060 formed by the protruding structure 3050, so the air outlet 3080 is also arranged on the side wall of the second box body 3020.

[0204] The length of the second box body 3020 is greater than that of the first shell assembly 60, so that after the first shell assembly 60 is installed in the second inner cavity 3010, an installation space 3110 for air flow and installation of devices is formed between the top of the first shell assembly 60 and the inner top of the second box body 3020.

[0205] The air flowing out from the inner air duct 3060 will first enter the installation space 3110, and under the action of the exhaust device 4000 (when the exhaust device 4000 is turned on), it will flow out of the second shell assembly 3000 into the outside through the air outlet 3080, or flow out of the second shell assembly 3000 into the outside through the air outlet 3080 without the help of the exhaust device 4000 (when the exhaust device 4000 is closed).

[0206] like Fig.19 and Fig. 22 As shown, in some embodiments, the outer surface of the second box body 3020 is provided with a groove 3120 corresponding to the protruding structure 3050; both ends of the groove 3120 are respectively connected to the edge of the second box body 3020, so that the groove 3120 forms an external air duct.

[0207] Exemplarily, the second box body 3020 can be formed by processing a plate.

[0208] For example, when a protruding structure 3050 protruding toward one side is formed on the side wall of the second box body 3020 by a mechanical processing process such as stamping, a recessed groove 3120 is correspondingly formed on the other side.

[0209] by Fig. 22 Taking the structure in as an example, one end of the groove 3120 passes through the upper edge of the second box body 3020, and the other end passes through the lower edge of the second box body 3020.

[0210] When the second housing assembly 3000 is hung on the wall 2000, the side wall of the second box body 3020 in the thickness direction is close to the wall 2000, so the wall 2000 will to some extent block the air discharged from the air outlet 3080 from flowing to the outside. At this time, the air discharged from the air outlet 3080 can enter the external air duct formed by the groove 3120 along the outer surface of the second box body 3020, and then be discharged to the outside more smoothly through the external air duct to the top and bottom of the second box body 3020.

[0211] like Fig. 22 As shown, in some embodiments, one end of the groove 3120 passes through the edge of the second box body 3020, and the other end is connected to the air outlet 3080, so that the groove 3120 forms an external air duct.

[0212] Exemplarily, an end of the groove 3120 may extend to an edge of the air outlet 3080 to achieve communication between the groove 3120 and the air outlet 3080 .

[0213] Exemplarily, a structure recessed toward the installation space 3110 may be formed on the second box body 3020, the air outlet 3080 is disposed on the recessed structure, and one end of the groove 3120 extends to the recessed structure, so that the groove 3120 and the air outlet 3080 can be connected through the recessed structure.

[0214] In order to further make it easier for the air discharged from the air outlet 3080 to enter the external air duct formed by the groove 3120, one end of the groove 3120 can be connected to the air outlet 3080. In this way, the air discharged from the air outlet 3080 does not need to flow through the outer surface of the second box body 3020, but directly enters the external air duct, so that the air can be discharged to the outside more smoothly.

[0215] In combination with the above content, it can be known that in order to reduce the obstruction caused by the wall 2000 to the air discharged from the air outlet 3080, the air can be guided through the external air duct formed by the groove 3120.

[0216] In addition, Fig. 22 As shown, in some embodiments, the second shell assembly 3000 is provided with an air guiding surface 3130 on at least one side of the circumference of the air outlet 3080 , and the air guiding surface 3130 is inclined in a direction away from the air outlet 3080 .

[0217] Exemplarily, the wind guiding surface 3130 may be disposed at least one of below, above, on the left, and on the right of the air outlet 3080 .

[0218] Exemplarily, the wind guiding surface 3130 may be an inclined plane or an inclined arc-shaped surface.

[0219] The wind guide surface 3130 is inclined in a direction away from the air outlet 3080, that is, the wind guide surface 3130 is an inclined surface diverging outward from the air outlet 3080. After the air is discharged from the air outlet 3080, at least a portion of the air can be inclined to diffuse outward under the guidance of the wind guide surface 3130, rather than along the axis of the air outlet 3080 (such as Fig. 22In this way, the air is blown toward the wall 2000 (the dotted line in the figure). In this way, on the one hand, the blocking effect of the wall 2000 on part of the air can be reduced, and on the other hand, the wind noise generated at the air outlet 3080 can be reduced. In particular, when the output of the exhaust device 4000 is large (for example, the exhaust fan rotates at a high speed) and the air outlet 3080 discharges a large amount of air at the same time, the effect is more obvious.

[0220] like Fig. 22 As shown, in some embodiments, the side wall of the second shell assembly 3000 is provided with an air guide groove 3140 , the air outlet 3080 is provided at the groove bottom of the air guide groove 3140 , and at least one groove wall of the air guide groove 3140 is provided with an air guide surface 3130 .

[0221] Exemplarily, the air guide groove 3140 can pass through the edge of the second shell assembly 3000 to form an opening structure connected to the air guide groove 3140 on the top or side wall of the second shell assembly 3000. The air in the air guide groove 3140 can be discharged from the air guide groove 3140 along the air guide surface 3130 or through the opening structure.

[0222] Exemplarily, the air guide groove 3140 is arranged at a position corresponding to the installation space 3110 .

[0223] In combination with the above content, it can be known that the side wall of the second housing component 3000 provided with the air outlet 3080 is close to the wall 2000. If a structure protruding from the surface is provided on the side wall to form the air guide surface 3130, the space for air flow will be further occupied. In order to avoid this situation, the present embodiment provides an inwardly concave air guide groove 3140, and the groove wall of the air guide groove 3140 is used as the air guide surface 3130, which can provide a larger space for air flow.

[0224] like Fig. 22 As shown, in some embodiments, the wind guiding surface 3130 extends from the edge of the groove wall close to the groove bottom to the edge of the groove wall close to the groove opening of the wind guiding groove 3140.

[0225] The air guide surface 3130 extends from the slot opening of the air guide slot 3140 to the bottom of the slot where the air outlet 3080 is located. On the one hand, when the air is discharged from the air outlet 3080, it can be guided by the air guide surface 3130, and the air can be driven to flow in an inclined direction as soon as possible; on the other hand, the length of the air guide surface 3130 can be extended along the axial direction of the air outlet 3080 to enhance the guiding effect of the air guide surface 3130 on the air.

[0226] like Fig.23 As shown, in some embodiments, along the extension direction of the slot wall, at least two wind guide surfaces 3130 are arranged at intervals on the slot wall.

[0227] In addition to providing a continuous wind guide surface 3130 on the groove wall, a discontinuous wind guide surface 3130 may also be provided on the groove wall. Fig.23 It can be seen that when the air guiding surface 3130 is a discontinuous structure, it can form a shorter air duct on one side of the air guiding groove 3140 to allow the air discharged from the air outlet 3080 to flow outward.

[0228] like Fig.23 , Fig.24 and Fig.25 As shown, in some embodiments, the side wall of the second shell assembly 3000 is further provided with a groove 3120 for forming an external air duct, and the air guide groove 3140 is connected to the groove 3120 through the air guide surface 3130 .

[0229] The air guide groove 3140 and the external air duct can form a continuous air guide structure through the air guide surface 3130. The air discharged from the air outlet 3080 can directly enter the external air duct formed by the groove 3120 along the air guide surface 3130, so as to further realize the rapid flow of air from the air outlet 3080 to the outside and shorten the residence time of the air in the air guide groove 3140.

[0230] like Figure 22 to Figure 25 As shown, in some embodiments, the direction from top to bottom of the second shell component 3000 is a first direction, at least two air outlets 3080 are arranged at intervals along a second direction perpendicular to the first direction, and the air guide surface 3130 is at least arranged on the groove wall of the air guide groove 3140 close to the bottom of the second shell component 3000, and the air guide surface 3130 extends along the second direction to the edge of the groove wall.

[0231] The first direction is the length direction of the second housing assembly 3000 , and the second direction is the width direction of the second housing assembly 3000 .

[0232] Due to gravity, the air discharged from the air outlet 3080 flows downward more easily, so the air guide surface 3130 is arranged below the air outlet 3080, which helps the air guide surface 3130 to guide more air. At the same time, the air guide surface 3130 extends to the edge of the slot wall along the second direction, and the action range of the air guide surface 3130 covers all the air outlets 3080. The air discharged from different air outlets 3080 will all flow obliquely under the action of the air guide surface 3130.

[0233] like Fig. 22 , Fig.24 and Fig.25 As shown, in some embodiments, a downwardly inclined rain guiding surface 3150 is provided on the top of the second shell assembly 3000 .

[0234] Exemplarily, the rain guiding surface 3150 is inclined close to the side of the wall 2000 to prevent rainwater from flowing into the opening of the second box body 3020 .

[0235] When the energy storage device is set in an outdoor environment, the rain guide surface 3150 can drive rainwater falling on the top of the second shell assembly 3000 to flow downward, preventing rainwater from staying on the top of the second shell assembly 3000 for a long time, causing the top of the second shell assembly 3000 to rust or penetrate into the second inner cavity 3010.

[0236] like Fig. 22 and Fig.25 As shown, in some embodiments, the air guide groove 3140 passes through to the top of the second shell assembly 3000, a rain guide plate 3160 is provided on one side of the air guide groove 3140 close to the top of the second shell assembly 3000, and a rain guide surface 3150 is provided on the surface of the rain guide plate 3160 close to the top of the second shell assembly 3000.

[0237] In order to reduce the difficulty of processing, a short rain guide plate 3160 can be provided only at the position of the air guide groove 3140, while the other surfaces on the top of the second housing assembly 3000 remain flat. The downwardly inclined rain guide surface 3150 provided on the top surface of the rain guide plate 3160 can form a guide structure on the top of the second housing assembly 3000, and can also guide the rainwater retained on the top of the second housing assembly 3000 downward.

[0238] like Figure 22 to Figure 25 As shown, in some embodiments, the rain deflector 3160 is connected to the bottom of the air guide groove 3140, and the side wall of the rain deflector 3160 close to the slot of the air guide groove 3140 does not extend out of the slot.

[0239] Exemplarily, the side wall of the rain deflector 3160 is flush with the notch of the air guide groove 3140. Fig.25 .

[0240] Exemplarily, there is a gap between the side wall of the rain deflector 3160 and the notch of the wind guide groove 3140, such as Fig. 22 and Fig.23 .

[0241] The connection between the rain deflector 3160 and the bottom of the air guide groove 3140 can prevent rainwater from flowing into the air outlet 3080 along the bottom of the air guide groove 3140, thereby damaging the components in the second inner cavity 3010. The side wall of the rain deflector 3160 does not extend out of the notch of the air guide groove 3140 in order to prevent the rain deflector 3160 from blocking the air from flowing from the air guide groove 3140 to the outside. At the same time, even if the rain deflector 3160 does not extend out of the notch of the air guide groove 3140, it can still guide rainwater and protect the exhaust component 4000.

[0242] like Figure 22 to Figure 25As shown, in some embodiments, the air outlet 3080 is disposed on the side wall of the second box body 3020 in the thickness direction, and the side wall is also provided with a hanging structure 3170 for positioning the second box body 3020.

[0243] Exemplarily, the hanging structure 3170 may be a plate-like structure that is fixedly connected to the side wall of the second box body 3020 , and the lower part of the plate-like structure is suspended for hanging on the wall 2000 .

[0244] The energy storage device can be stably positioned on the wall 2000 by the hanging structure 3170. At the same time, due to the wind guide surface 3130 and the groove 3120 for forming the external air duct provided in the second housing assembly 3000, even if the air outlet 3080 is close to the wall 2000, the blocking effect of the wall 2000 on the air discharged from the air outlet 3080 can be effectively reduced, thereby reducing the wind noise at the air outlet 3080.

[0245] like Figure 4 , Fig.16 and Fig. 22 As shown, in some embodiments, the second shell assembly 3000 includes a second box body 3020 and a second box cover 3030 that are detachably connected, a second inner cavity 3010 is provided in the second box body 3020, and the battery module 1000 is provided in the second inner cavity 3010; the second fastener 3040 passes through the second box body 3020 and the first box body 602 in sequence and is connected to the pallet 100.

[0246] Exemplarily, the second fastener 3040 may be a screw.

[0247] After the battery module 1000 is placed into the second inner cavity 3010, the battery module 1000 is connected to the second box body 3020 through the second fastener 3040, which helps to keep the battery module 1000 firmly in the preset position in the second inner cavity 3010, and also helps to keep the outer surface of the first shell assembly 60 of the battery module 1000 in contact with the raised structure 3050 on the second box body 3020, ensuring the stability of the structure of the inner air duct 3060.

[0248] At the same time, the second box body 3020, the first box body 602 and the first box cover 603 can be connected into a whole through the support plate 100, which can also improve the overall strength of the battery module 1000 and the energy storage device.

[0249] like Figure 4 and Fig.17 As shown, in some embodiments, the first box cover 603 is provided with a plurality of second inner reinforcing ribs 170 spaced apart along the second direction. The second inner reinforcing ribs 170 extend along the first direction, and the gaps between adjacent second inner reinforcing ribs 170 form an outer air duct 180 of the box cover.

[0250] It can be known from the above contents that the air entering the second inner cavity 3010 from the air inlet 3070 flows along the first direction to the air outlet 3080. Therefore, the second inner reinforcing rib 170 extends along the first direction, and a box cover outer air duct 180 can also be formed on the outer side of the first box cover 603, so that air can flow through the first box cover 603, so that the battery module 1000 can exchange heat in both the first box body 602 and the first box cover 603, which helps to improve the heat dissipation efficiency of the energy storage device.

[0251] like Figure 4 As shown, in some embodiments, the end of the second inner reinforcing rib 170 extends to the edge of the first box cover 603.

[0252] The end of the second inner reinforcing rib 170 extends to the edge of the first box cover 603, so that the outer air duct 180 of the box cover can completely cover the first box cover 603 along the first direction, which helps to improve the heat exchange efficiency of the air flowing in the outer air duct 180 of the box cover to the battery module 1000, and helps to improve the overall heat dissipation effect of the energy storage device.

[0253] like Fig. 22 As shown, in some embodiments, a plurality of first outer reinforcing ribs 3180 are cross-disposed on one side of the second box cover 3030 close to the battery module 1000 .

[0254] The plurality of cross-arranged first outer reinforcing ribs 3180 can enhance the strength of the second box cover 3030 to a large extent, and can ensure a smooth appearance even if the second box cover 3030 has a relatively large surface.

[0255] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims.

[0256] The various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0257] The description of the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present application, and to enable those of ordinary skill in the art to understand the present application and thus design various embodiments with various modifications suitable for specific purposes.

[0258] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0259] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0260] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. An energy storage device, characterized in that: include: A battery module, comprising a first housing assembly having a first inner cavity, wherein a plurality of battery cells are disposed in the first inner cavity; The second shell component is provided with a second inner cavity, the battery module is arranged in the second inner cavity, the second shell component is provided with an air outlet connecting the outside and the second inner cavity, the second shell component is provided with an air guide surface on at least one side of the circumference of the air outlet, and the air guide surface is inclined in a direction away from the air outlet.

2. The energy storage device according to claim 1, characterized in that: The side wall of the second shell component is provided with an air guide groove, the air outlet is provided at the groove bottom of the air guide groove, and at least one groove wall of the air guide groove is provided with the air guide surface.

3. The energy storage device according to claim 2, characterized in that: The wind guiding surface extends from an edge of the groove wall close to the groove bottom to an edge of the groove wall close to the groove opening of the wind guiding groove.

4. The energy storage device according to claim 2, characterized in that: Along the extending direction of the slot wall, at least two wind guide surfaces are arranged at intervals on the slot wall.

5. The energy storage device according to claim 2, characterized in that: The side wall of the second shell component is also provided with a groove for forming an external air duct, and the air guide groove is connected with the groove through the air guide surface.

6. The energy storage device according to claim 2, characterized in that: The direction from top to bottom of the second shell component is a first direction, and at least two air outlets are arranged at intervals along a second direction perpendicular to the first direction. The wind guide surface is at least arranged on the groove wall of the air guide groove close to the bottom of the second shell component, and the wind guide surface extends along the second direction to the edge of the groove wall.

7. The energy storage device according to claim 1, characterized in that: A downwardly inclined rain guiding surface is arranged on the top of the second shell assembly.

8. The energy storage device according to claim 7, characterized in that: The side wall of the second shell component is provided with an air guide groove, and the air guide groove passes through to the top of the second shell component. A rain guide plate is provided on one side of the air guide groove close to the top of the second shell component, and the surface of the rain guide plate close to the top of the second shell component is provided with the rain guide surface.

9. The energy storage device according to claim 8, characterized in that: The rain deflector is connected to the bottom of the air guide groove, and the side wall of the rain deflector close to the notch of the air guide groove does not extend out of the notch.

10. The energy storage device according to claim 1, characterized in that: The air outlet is arranged on the side wall of the second shell component in the thickness direction, and the side wall is also provided with a hanging structure for positioning the second shell component.

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