Battery and energy storage device

Abstract

The utility model belongs to the technical field of energy storage, and particularly relates to a battery and an energy storage device.The energy storage device comprises a supporting piece, a battery pack and a plurality of bearing pieces, the bearing pieces are installed on the side portion of the supporting piece at intervals in the first direction, and each bearing piece comprises a bearing part; the battery pack comprises a plurality of batteries, the plurality of batteries are sequentially installed on the bearing parts of the bearing pieces in the first direction, and the bearing parts are located between every two adjacent batteries; each battery comprises a box body and a battery monomer arranged in the box body; two adjacent batteries are divided into a first battery and a second battery, the bearing piece for bearing the first battery is a first bearing piece, and the bearing piece for bearing the second battery is a second bearing piece; an avoiding structure for avoiding the bearing part of the second bearing piece is arranged on the side part, facing the second battery, of the box body of the first battery; the bearing part can be avoided by utilizing the avoiding structure, so that the internal space of the box body is improved, the battery monomers with larger sizes and larger capacitance can be adopted, and the capacitance of the battery and the energy storage device is improved.

Description

Technical Field

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

[0002] The new power system based on new energy is becoming an important choice for sustainable energy development. With the rapid development of new energy technology, the application of energy storage devices is becoming more and more extensive.

[0003] An energy storage device is usually provided with multiple batteries and multiple supporting members. The multiple supporting members are spaced apart along the height direction of the energy storage device, and the multiple batteries are sequentially mounted on each supporting member so that the multiple batteries are stacked along the height direction of the energy storage device. Gaps are usually reserved between the batteries to avoid interference between the batteries and the supporting members. However, when the height of the energy storage device is fixed, the setting of the gap will limit the height of the battery, which is not conducive to increasing the internal space of the battery.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a battery and an energy storage device, including but not limited to solving the problem that it is not easy to increase the internal space of the battery in the energy storage device in the related art.

[0006] The technical solution adopted in the embodiment of the present application is:

[0007] In a first aspect, an energy storage device is provided, which includes a support member, a battery pack and a plurality of supporting members, wherein the plurality of supporting members are installed at intervals on the side of the support member along a first direction, and each supporting member includes a supporting portion; the battery pack includes a plurality of batteries, and the plurality of batteries are installed on the supporting portions of the supporting members in sequence along the first direction, and the supporting portion is located between two adjacent batteries; each battery includes a box body and a battery cell arranged in the box body; two adjacent batteries are respectively a first battery and a second battery, the supporting member for supporting the first battery is a first supporting member, and the supporting member for supporting the second battery is a second supporting member; the side of the box body of the first battery facing the second battery is provided with an avoidance structure for avoiding the supporting portion of the second supporting member.

[0008] In the energy storage device according to the embodiment of the present application, a plurality of supporting members are mounted on the supporting member along the first direction, and a plurality of batteries in the battery pack are sequentially mounted on the supporting portions of the respective supporting members along the first direction, so that the plurality of batteries form a multi-layer battery stacking structure; each battery includes a box body and battery cells disposed in the box body; and two adjacent batteries are divided into a first battery and a second battery, the supporting member for supporting the first battery is a first supporting member, and the supporting member for supporting the second battery is a second supporting member; an avoidance structure for avoiding the supporting portion of the second supporting member is provided on the side of the box body of the first battery facing the second battery, and the supporting portion of the second supporting member can be avoided by using the avoidance structure of the first battery, so that other regions of the side of the box body of the first battery close to the second battery except the avoidance structure can move towards the second battery, thereby increasing the size of the first battery in the first direction, increasing the internal space of the box body of the first battery, and since the internal space of the box body of the first battery is large, battery cells with larger sizes and larger capacitances can be used, which is beneficial to increasing the capacitances of the battery and the energy storage device; in addition, the gap between the batteries can also be reduced, and the space utilization rate in the energy storage device can be improved.

[0009] In some embodiments, the box body of the first battery includes a first side wall and a second side wall, the first side wall faces the supporting member, the second side wall faces the second battery, and the avoidance structure is connected between the first side wall and the second side wall, and an avoidance space for avoiding the supporting portion of the second supporting member is formed on the side of the avoidance structure facing away from the battery cells.

[0010] By adopting the technical solution of this embodiment, the avoidance structure is located at the edge of the side of the box body of the first battery facing the second battery, so that most of the region of the box body of the first battery facing the second battery can move towards the second battery, that is, the second side wall can move towards the second battery, so that the internal space of the box body of the first battery can be increased more, and larger-sized and larger-capacity battery cells can be accommodated in the first battery, which is beneficial to increasing the capacitances of the battery and the energy storage device; in addition, the gap between the batteries can also be reduced, and the space utilization rate in the energy storage device can be improved.

[0011] In some embodiments, at least a part of the supporting portion of the second supporting member is located in the avoidance space.

[0012] By adopting the technical solution of this embodiment, the second supporting member is located in the avoidance space, the distance between the second supporting member and the second side wall is closer, the second side wall can be closer to the second battery, and larger-sized and larger-capacity battery cells can be accommodated in the first battery, which is beneficial to increasing the capacitances of the battery and the energy storage device; in addition, the gap between the batteries can be better reduced, and the space utilization rate in the energy storage device can be improved.

[0013] In some embodiments, the distance between the side of the supporting portion of the second supporting member facing away from the supporting member and the supporting member is L1, and the distance between the second side wall and the supporting member is L2, where L1 ≤ L2.

[0014] By adopting the technical solution of this embodiment, in the direction of the supporting member towards the first battery, the second supporting member will not interfere with the second side wall, and the avoidance effect of the avoidance structure on the second supporting member is good.

[0015] In some embodiments, the distance between the second side wall and the second battery is L3, and the dimension of the supporting portion of the second supporting member in the first direction is L4, where L3 < L4.

[0016] By adopting the technical solution of this embodiment, the supporting portion of the second supporting member is located in the avoidance space, making the second side wall closer to the second battery, increasing the dimension of the box body of the first battery in the first direction, having a large internal space of the box body of the battery, and allowing more large-size and large-capacity battery monomers to be accommodated in the first battery, which is beneficial to improving the capacitance of the battery and the energy storage device; in addition, the gap between the batteries is also reduced, improving the space utilization rate in the energy storage device.

[0017] In some embodiments, the avoidance structure includes an inclined section, and the inclined section is connected between the first side wall and the second side wall. The inclined section extends obliquely towards the second side wall and towards the inside of the box body from the end for connecting with the first side wall.

[0018] By adopting the technical solution of this embodiment, the avoidance structure adopts the structure of the inclined section, with a simple structure and simple forming of the avoidance structure, which is beneficial to reducing the manufacturing cost of the box body.

[0019] In some embodiments, the avoidance structure further includes a first arc section, and the first arc section is connected between the first side wall and the inclined section; and / or, the avoidance structure further includes a second arc section, and the second arc section is connected between the second side wall and the inclined section.

[0020] By adopting the technical solution of this embodiment, it is beneficial to reduce stress concentration, improve the structural reliability of the box body, improve the use reliability of the battery, and is also convenient for processing and forming.

[0021] In some embodiments, the avoidance structure is recessed towards the inside of the box body to form an avoidance notch, and the avoidance notch forms an avoidance space.

[0022] By adopting the technical solution of this embodiment, the avoidance space is obtained by the avoidance structure being recessed towards the inside of the box body, and the processing and manufacturing of the avoidance structure are convenient.

[0023] In some embodiments, the avoidance structure includes a bending section, and the bending section is connected between the first side wall and the second side wall, and the bending section encloses to form an avoidance notch.

[0024] By adopting the technical solution of this embodiment, the avoidance structure adopts a bending structure, and the processing and forming of the box body is simple.

[0025] In some embodiments, the bending segment includes a first straight line subsegment and a second straight line subsegment intersecting each other, the first straight line subsegment is connected between the first side wall and the second straight line subsegment, and the second straight line subsegment is connected between the first straight line subsegment and the second side wall.

[0026] By adopting the technical solution of this embodiment, the bending section adopts the structure of the first straight line sub-segment and the second straight line sub-segment, the structure is simple, and the processing and forming of the box body is simpler.

[0027] In some embodiments, the first straight line subsegment is perpendicular to the second straight line subsegment.

[0028] By adopting the technical solution of this embodiment, the shape of the bending section is regular and the processing and forming of the box body is simpler.

[0029] In some embodiments, the bending segment further includes an arcuate sub-segment, and the arcuate sub-segment is connected between the first straight line sub-segment and the second straight line sub-segment.

[0030] By adopting the technical solution of this embodiment, the arc sub-segment can smoothly transition to connect the first straight sub-segment and the second straight sub-segment, which is beneficial to reduce stress concentration, improve the structural reliability of the box, improve the reliability of the battery, and facilitate processing and forming.

[0031] In some embodiments, the first straight line sub-segment is perpendicular to the first side wall, and / or the second straight line sub-segment is perpendicular to the second side wall.

[0032] By adopting the technical solution of this embodiment, the structure of the box body at the avoidance structure is regular, and the processing and forming of the box body is simpler.

[0033] In some embodiments, the battery cell in the first battery has a first end face facing the second battery, the first end face is provided with an electrode terminal, and the orthographic projection of the avoidance structure on the first end face is staggered with the orthographic projection of the portion of the electrode terminal protruding from the first end face on the first end face.

[0034] By adopting the technical solution of this embodiment, in the first battery, the electrode terminals and the avoidance structure are staggered, and the electrode terminals are arranged relatively to other areas of the side of the box body facing the second battery except the avoidance structure. Then, after the other areas of the side of the box body facing the second battery except the avoidance structure are moved toward the second battery, the electrode terminals and the first end face can also be moved toward the second battery, so that battery cells with larger size and larger capacity in the first direction can be selected and placed in the box body, which is beneficial to increasing the capacity of the battery and the energy storage device.

[0035] In some embodiments, each supporting member further includes a connecting portion, and the supporting portion is connected to the connecting portion at a side in the first direction.

[0036] By adopting the technical solution of this embodiment, the connecting portion can increase the connection area between the supporting member and the supporting component, and can improve the reliability of battery support.

[0037] In some embodiments, the connecting portion and the battery supported on the supporting portion are located on the same side of the supporting portion.

[0038] By adopting the technical solution of this embodiment, the connecting portion of the supporting member is located between the battery supported on the connecting portion of the supporting member and the supporting component. In this way, the interference risk of the connecting portion of the supporting member to other batteries can be reduced, which is beneficial to reducing the distance between batteries and beneficial to the compactness of the energy storage device.

[0039] In some embodiments, the number of supporting components is multiple, the multiple supporting components are arranged at intervals in the second direction, a battery pack is provided between two adjacent supporting components, and a supporting member is provided on the opposite sides of two adjacent supporting components; avoidance structures are connected to the opposite sides of the box body of the first battery in the second direction, and the second direction is perpendicular to the first direction.

[0040] By adopting the technical solution of this embodiment, the supporting member between two adjacent supporting components can support the opposite sides of the batteries in the battery pack in the second direction, improving the supporting stability of the batteries.

[0041] In some embodiments, the supporting component includes a first supporting portion and a second supporting portion, the first supporting portion and the second supporting portion are arranged in the third direction, and the opposite ends of the supporting member in the third direction are respectively connected to the first supporting portion and the second supporting portion, and the third direction is perpendicular to the first direction and the second direction.

[0042] By adopting the technical solution of this embodiment, the supporting member can have a longer dimension in the third direction, the battery can be supported over a large area in the third direction, and the supporting stability of the battery is good; in addition, the two ends of the supporting member are connected to the supporting component, and there are many connection positions between the supporting component and the supporting member, and the connection reliability is good, which is beneficial to improving the use reliability of the energy storage device.

[0043] In a second aspect, a battery is provided, which includes a battery cell and a box body, and the battery cell is located in the box body; the box body includes a first side wall, a second side wall and a third side wall, the second side wall and the third side wall are arranged at intervals in the first direction, the battery cell is located between the second side wall and the third side wall, the first side wall is located between the second side wall and the third side wall, an avoidance structure is connected between the first side wall and the second side wall, and an avoidance space is formed on the side of the avoidance structure facing away from the inside of the box body.

[0044] During the installation of the battery according to the embodiment of the present application in the energy storage device, after multiple batteries are installed on the supporting part of the supporting member of the energy storage device along the first direction, the second side wall faces the adjacent battery, the third side wall is supported on the supporting part of the supporting member, the first side wall and the supporting member are on the same side of the battery, and the avoidance space formed by the avoidance structure connected between the first side wall and the second side wall can be used to accommodate the supporting part of the supporting member for supporting the adjacent battery. In this way, the second side wall of the battery can move towards the adjacent battery, thereby increasing the internal space of the battery box, enabling the battery to accommodate larger-sized and higher-capacity battery cells, which is beneficial to increasing the capacitance of the battery and the energy storage device. Additionally, the gap between the batteries can also be reduced, improving the space utilization rate and volume energy density within the energy storage device.

[0045] In some embodiments, the avoidance structure includes an inclined section, which is connected between the first side wall and the second side wall, and the inclined section extends obliquely towards the inside of the box from the end for connecting with the first side wall towards the second side wall.

[0046] By adopting the technical solution of this embodiment, the avoidance structure uses the structure of the inclined section, which is simple in structure and easy to form, facilitating the reduction of the manufacturing cost of the box.

[0047] In some embodiments, the avoidance structure further includes a first arc section, which is connected between the first side wall and the inclined section; and / or, the avoidance structure further includes a second arc section, which is connected between the second side wall and the inclined section.

[0048] By adopting the technical solution of this embodiment, it is beneficial to reduce stress concentration, improve the structural reliability of the box, enhance the service reliability of the battery, and also facilitate processing and forming.

[0049] In some embodiments, the avoidance structure is recessed towards the inside of the box to form an avoidance notch, and the avoidance notch forms the avoidance space.

[0050] By adopting the technical solution of this embodiment, the avoidance space is obtained by the avoidance structure being recessed towards the inside of the box, and the processing and manufacturing of the avoidance structure are convenient.

[0051] In some embodiments, the avoidance structure includes a bent section, which is connected between the first side wall and the second side wall, and the bent section encloses to form an avoidance notch.

[0052] By adopting the technical solution of this embodiment, the avoidance structure uses a bent structure, and the processing and forming of the box are simple.

[0053] In some embodiments, the bent section includes an intersecting first straight sub-section and a second straight sub-section, the first straight sub-section is connected between the first side wall and the second straight sub-section, and the second straight sub-section is connected between the first straight sub-section and the second side wall.

[0054] By adopting the technical solution of this embodiment, the bending section adopts the structure of the first straight line sub-segment and the second straight line sub-segment, the structure is simple, and the processing and forming of the box body is simpler.

[0055] In some embodiments, the first straight line subsegment is perpendicular to the second straight line subsegment.

[0056] By adopting the technical solution of this embodiment, the shape of the bending section is regular and the processing and forming of the box body is simpler.

[0057] In some embodiments, the bending segment further includes an arcuate sub-segment, and the arcuate sub-segment is connected between the first straight line sub-segment and the second straight line sub-segment.

[0058] By adopting the technical solution of this embodiment, the arc sub-segment can smoothly transition to connect the first straight sub-segment and the second straight sub-segment, which is beneficial to reduce stress concentration, improve the structural reliability of the box, improve the reliability of the battery, and facilitate processing and forming.

[0059] In some embodiments, the first straight line sub-segment is perpendicular to the first side wall, and / or the second straight line sub-segment is perpendicular to the second side wall.

[0060] By adopting the technical solution of this embodiment, the structure of the box body at the avoidance structure is regular, and the processing and forming of the box body is simpler.

[0061] In some embodiments, the battery cell has a first end surface facing the second side wall, the first end surface is provided with an electrode terminal, and the orthographic projection of the avoidance structure on the first end surface is staggered with the orthographic projection of the portion of the electrode terminal protruding from the first end surface on the first end surface.

[0062] By adopting the technical solution of this embodiment, the electrode terminal is staggered with the avoidance structure, and the electrode terminal is arranged opposite to the second side wall. Then, after the second side wall moves toward the second battery, the electrode terminal and the first end face can also move toward the second battery, so that a battery cell with a larger size and a larger capacity in the first direction can be selected and placed in the box, which is beneficial to increasing the capacity of the battery and the energy storage device.

[0063] In some embodiments, the second side wall is connected to avoidance structures on two opposite sides along a second direction, and the second direction is perpendicular to the first direction.

[0064] By adopting the technical solution of this embodiment, the two opposite sides of the second reserve distributed along the second direction are connected with avoidance structures. The two avoidance structures can avoid the supporting parts of the two supporting members for supporting adjacent batteries, so that the second side wall can be better close to the adjacent batteries to increase the internal space of the box body, so that battery cells with larger size and larger capacity in the first direction can be selected and placed in the box body, which is beneficial to increasing the capacity of the battery and the energy storage device.

[0065] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of this application more obvious and understandable, the following specific embodiments of this application are given. Description of the Drawings

[0066] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0067] Figure 1 It is a schematic structural diagram of a perspective of an energy storage device provided for some embodiments of this application.

[0068] Figure 2 For Figure 1 It is a schematic structural diagram of another perspective of the energy storage device shown.

[0069] Figure 3 It is a sectional view of an energy storage device provided for some other embodiments of this application along the Figure 2 A-A line in

[0070] Figure 4 For Figure 3 It is a partial enlarged view at B in

[0071] Figure 5 It is a sectional view of an energy storage device provided for some other embodiments of this application along the Figure 2 A-A line in

[0072] Figure 6 For Figure 5 It is a partial enlarged view at C in

[0073] Figure 7 For Figure 1 It is a schematic structural diagram of the battery shown in

[0074] Figure 8 It is a schematic structural diagram of an energy storage container provided for some embodiments of this application.

[0075] Figure 9 It is a schematic structural diagram of an energy storage cabinet provided for some embodiments of this application.

[0076] Among them, the reference numerals in the drawings:

[0077] 1000. Energy storage device; 1010. Energy storage container; 1011. Container; 1020. Energy storage electrical cabinet; 1021. Cabinet body; 1100. Battery pack; 100. Battery; 101. First battery; 102. Second battery; 10. Battery cell; 11. Electrode terminal; 12. First end face; 20. Box body; 201. Avoidance space; 202. Avoidance notch; 21. First part; 211. First side wall; 212. Second side wall; 213. Avoidance structure; 2131. Inclined section; 2132. First arc section; 2133. Second arc section; 2134. Bending section; 21341. First straight sub-section; 21342. Second straight sub-section; 21343. Arc sub-section; 22. Second part; 221. Third side wall; 1200. Support member; 1210. First support part; 1220. Second support part; 1300. Supporting member; 1301. First supporting member; 1302. Second supporting member; 1310. Supporting part; 1320. Connecting part. Detailed implementation manners

[0078] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0079] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0080] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0081] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments may be included in at least some embodiments of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0082] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this article, the character " / " generally represents an "or" relationship between the associated objects before and after.

[0083] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces). The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0084] In the description of the embodiments of the present application, for technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0085] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "attachment", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0086] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0087] A new power system with new energy as the main body is becoming an important option for the sustainable development of energy. With the rapid development of new energy technologies, the application of energy storage devices is becoming more and more widespread.

[0088] In the related art, an energy storage device is provided. Usually, a support member, a plurality of supporting members, and a plurality of batteries are provided in the energy storage device. The plurality of supporting members are installed on one side of the support member and are spaced apart in the height direction of the energy storage device. The plurality of batteries are sequentially installed on the supporting portions of the supporting members in the height direction of the energy storage device. The batteries are lifted by the supporting portions to form a multi-layer battery stacking structure. The edge of the battery case near the supporting portion for supporting adjacent batteries is a right-angle structure. Therefore, in order to avoid interference between the supporting portion and the battery, a certain gap needs to be reserved between two adjacent batteries to accommodate the supporting portion. However, when the height of the energy storage device is fixed, the setting of this gap will limit the height of the battery and is not conducive to increasing the internal space of the battery case.

[0089] Based on this, in order to increase the internal space of the batteries in the energy storage device, an embodiment of the present application provides an energy storage device. In the battery pack of this energy storage device, two adjacent batteries are divided into a first battery and a second battery. The battery case of the first battery is provided with an avoidance structure, and the avoidance structure can avoid the supporting portion between the adjacent first battery and the second battery. In this way, other regions of the side of the battery case of the first battery except the avoidance structure close to the second battery can move towards the second battery, thereby increasing the size of the first battery in the first direction and increasing the internal space of the battery case of the first battery. The larger the internal space of the battery case of the first battery, larger-sized and larger-capacity battery cells can be used, which is beneficial to increasing the capacitance of the battery and the energy storage device. In addition, the gap between the batteries can also be reduced, improving the space utilization rate and volume energy density in the energy storage device.

[0090] The battery mentioned in the embodiment of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. A battery generally includes a case for encapsulating one or more battery cells. The case can, to a certain extent, prevent liquids or other foreign substances from affecting the charging or discharging of the battery cells.

[0091] In a battery, when there are multiple battery cells, the multiple battery cells can be connected in series, parallel, or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the multiple battery cells. The multiple battery cells can be directly connected in series, parallel, or in a series-parallel combination and then the whole formed by the multiple battery cells is accommodated in the case. Of course, the battery can also be in a form where multiple battery cells are first connected in series, parallel, or in a series-parallel combination to form battery modules, and then the multiple battery modules are connected in series, parallel, or in a series-parallel combination to form a whole and are accommodated in the case. The battery can also include other structures. For example, the battery can also include a busbar component for realizing the electrical connection between the multiple battery cells.

[0092] The battery cell in the embodiment of the present application includes an electrode assembly and a housing, and the electrode assembly is installed in the housing to protect the electrode assembly through the housing.

[0093] The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The electrode assembly mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The part of the positive electrode current collector where the positive electrode active material layer is not coated protrudes from the part where the positive electrode active material layer is coated. The part where the positive electrode active material layer is not coated serves as the positive electrode tab, or a metal conductor is welded and led out on the positive electrode current collector to serve as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The part of the negative electrode current collector where the negative electrode active material layer is not coated protrudes from the part where the negative electrode active material layer is coated. The part where the negative electrode active material layer is not coated serves as the negative electrode tab, or a metal conductor is welded and led out on the negative electrode current collector to serve as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure to a certain extent that a large current can pass through without fusing, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. It can be understood that in the electrode assembly, the number of positive electrode tabs can be one, and the number of negative electrode tabs can also be one. That is to say, two sets of tabs are provided on the electrode assembly, each set includes at least one tab, and one set of tabs is the positive electrode tab, and the other set of tabs is the negative electrode tab.

[0094] The electrode assembly can be a wound structure or a stacked structure. The embodiments of the present application are not limited thereto. In the wound structure, the tabs are mostly welded to the current collector, and then arranged in the order of positive electrode sheet - separator - negative electrode sheet - separator; and then wound to form a cylindrical or square battery cell. In the stacked structure, the tabs are mostly led out on the current collector, and the positive electrode sheet, the negative electrode sheet, and the separator are arranged in the order of positive electrode sheet - separator - negative electrode sheet - separator and stacked layer by layer to form a stacked battery cell; among them, the separator can be cut and directly stacked with separator sheets, or the separator is not cut, but stacked in a Z-shaped fold. The material of the separator can be PP (Polypropylene) or PE (Polyethylene), etc. The separator is an insulating film provided between the positive electrode sheet and the negative electrode sheet. Its main functions are: to isolate the positive and negative electrodes and prevent electrons in the battery from freely passing through, to prevent short circuit to a certain extent, and to allow ions in the electrolyte to freely pass between the positive and negative electrodes to form a circuit between the positive and negative electrodes. The positive electrode sheet and the negative electrode sheet are collectively referred to as the electrode sheets. The positive electrode tab and the negative electrode tab are collectively referred to as the tabs.

[0095] The outer shell refers to a shell structure with an internal space to accommodate and protect the electrode assembly. The outer shell can be made of a material with a certain hardness and strength. In this way, the outer shell is not easily deformed when subjected to extrusion and collision, enabling the battery cell to have higher structural strength and improved reliability. The material of the outer shell can be various, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0096] The batteries and energy storage devices of the embodiments of the present application are introduced below.

[0097] The energy storage device involved in the embodiments of the present application includes one or more battery packs, and the multiple battery packs are connected in series, parallel, or in a hybrid connection. The energy storage device can be used as an energy storage cabinet, energy storage station, energy storage container, etc. in new energy power systems such as wind energy, solar energy, and water energy.

[0098] For the convenience of description, refer to Figures 1-9 As shown, it representatively shows a schematic diagram of the energy storage device 1000 and the battery 100 provided by the embodiments of the present application.

[0099] Refer to Figure 1 As shown, the energy storage device 1000 has a height direction, a length direction, and a width direction. The height direction of the energy storage device 1000 can be referred to as the Z direction in the figure, the width direction of the energy storage device 1000 can be referred to as the Y direction in the figure, and the length direction of the energy storage device 1000 can be referred to as the X direction in the figure. The first direction can be referred to as the height direction of the energy storage device 1000, the second direction can be referred to as the width direction of the energy storage device 1000, and the third direction can be referred to as the length direction of the energy storage device 1000; it should be understood that the first direction can also be referred to as the width direction or the length direction of the energy storage device 1000.

[0100] Refer to Figures 1-6As shown, in some embodiments of the present application, an energy storage device 1000 is provided. The energy storage device 1000 includes a support member 1200, a battery pack 1100, and a plurality of supporting members 1300. The plurality of supporting members 1300 are spaced apart along a first direction and installed on the side of the support member 1200. Each supporting member 1300 includes a supporting portion 1310; the battery pack 1100 includes a plurality of batteries 100. The plurality of batteries 100 are sequentially installed on the respective supporting members 1300 along the first direction, and the supporting portion 1310 is located between two adjacent batteries 100; each battery 100 includes a box body 20 and a battery cell 10 disposed inside the box body 20; two adjacent batteries 100 are respectively a first battery 101 and a second battery 102. The supporting member 1300 for supporting the first battery 101 is a first supporting member 1301, and the supporting member 1300 for supporting the second battery 102 is a second supporting member 1302; an avoidance structure 213 for avoiding the supporting portion 1310 of the second supporting member 1302 is provided on the side of the box body 20 of the first battery 101 facing the second battery 102.

[0101] The support member 1200 may refer to a component for supporting the supporting member 1300. The support member 1200 may be arranged parallel to the first direction or may be nearly parallel to the first direction; the support member 1200 may be, but is not limited to, a plate member or a rod member.

[0102] The supporting member 1300 may refer to a component fixed to the support member 1200 and used to support the battery 100; the supporting portion 1310 may refer to the part of the supporting member 1300 used to connect with the battery 100. The plurality of supporting members 1300 are arranged at intervals along the first direction. The number of the supporting members 1300 may be two, three, four or more than five. The plurality of batteries 100 are sequentially installed on the supporting members 1300 of the respective supporting members 1300. The plurality of batteries 100 are arranged in one-to-one correspondence with the plurality of supporting members 1300. The battery 100 abuts against the supporting portion 1310, and the supporting portion 1310 is located between two adjacent batteries 100, so that the battery 100 can be located between the supporting portions 1310 of two adjacent supporting members 1300.

[0103] Exemplarily, referring to Figure 8 As shown, in the case where the energy storage device 1000 is an energy storage container 1010, the energy storage container 1010 includes a container 1011. The battery pack 1100 and the supporting member 1300 are located inside the container 1011. The support member 1200 may refer to a vertical rod or a vertical plate provided inside the energy storage box or the side wall of the container 1011. Among them, the vertical plate or the vertical rod divides the internal space of the container 1011 into a plurality of spaces, and each space can accommodate one or more battery packs 1100. Among them, the lowermost supporting member 1300 may refer to the bottom wall of the container 1011, and the lowermost supporting member 1300 may also have the same structure as other supporting members 1300.

[0104] For example, referring to Figure 9 as shown, when the energy storage device 1000 is an energy storage cabinet 1020, the energy storage cabinet 1020 is a cabinet body 1021, the support member 1200 can refer to the side wall of the cabinet body 1021, the battery pack 1100 and the supporting member 1300 are located inside the container 1011. Among them, the lowermost supporting member 1300 can refer to the bottom wall of the cabinet body 1021, and the lowermost supporting member 1300 can also have the same structure as other supporting members 1300. The lowermost supporting member 1300 can also be spaced from the bottom wall of the cabinet body 1021 to raise the lowermost battery 100 and reduce the risk of water ingress into the lowermost battery 100.

[0105] The battery pack 1100 can refer to a component including a plurality of batteries 100 arranged in a first direction. Each battery pack 1100 can include a plurality of batteries 100, and the plurality of batteries 100 in the battery pack 1100 can be connected in series, parallel, or in a combined series-parallel manner.

[0106] The battery 100 includes a box body 20 and a battery cell 10, and the battery cell 10 is accommodated in the box body 20. Among them, the box body 20 is used to provide an accommodation space for the battery cell 10, and the box body 20 can adopt various structures. The box body 20 can be of various shapes, such as a cylinder, a cuboid, etc.

[0107] For example, the box body 20 can include a first part 21 and a second part 22. The first part 21 and the second part 22 cover each other, and the first part 21 and the second part 22 jointly define an accommodation space for accommodating the battery cell 10. The second part 22 can be a hollow structure with one end open, and the first part 21 can be a plate-like structure. The first part 21 covers the open side of the second part 22 so that the first part 21 and the second part 22 jointly define the accommodation space; the first part 21 and the second part 22 can also both be hollow structures with one side open, and the open side of the first part 21 covers the open side of the second part 22.

[0108] Among two adjacent batteries 100 in the battery pack 1100, one battery 100 is the first battery 101, and the other battery 100 is the second battery 102. The second battery 102 is located above the first battery 101. The supporting member 1300 for supporting the first battery 101 is the first supporting member 1301, and the supporting member 1300 for supporting the second battery 102 is the second supporting member 1302. Among the supporting members 1300 for supporting two adjacent batteries 100, the supporting member 1300 located below is the first supporting member 1301, and the supporting member 1300 located above is the second supporting member 1302.

[0109] The housing 20 of the first battery 101 is connected with an avoidance structure 213 near the side of the second battery 102. An avoidance space 201 can be formed between the avoidance structure 213 and the second battery 102. The avoidance space 201 is used to accommodate the supporting portion 1310 of the second supporting member 1302 so as to avoid the supporting portion 1310 of the second supporting member 1302. Among them, the housing 20 of the first battery 101 is recessed away from the second battery 102, thereby forming the avoidance space 201 for avoiding the supporting portion 1310. Or, the avoidance structure 213 can also refer to the chamfering treatment of the corner of the first battery 101 near the second supporting member 1302 to form the avoidance space 201 for avoiding the supporting portion 1310. Of course, the avoidance structure 213 can also be other structures that can avoid the second supporting member 1302.

[0110] When the number of batteries 100 is equal to two, the battery 100 located at the lower side is the first battery 101, and the battery 100 located at the upper side is the second battery 102. At this time, the housing 20 of the first battery 101 is provided with the avoidance structure 213, and the housing 20 of the second battery 102 can be provided with the avoidance structure 213, so that the energy storage device 1000 can use batteries 100 with the same structure, and the assembly is convenient and simple. Of course, the second battery 102 can also not be provided with the avoidance structure 213, which can be set according to actual needs.

[0111] When the number of batteries 100 is greater than or equal to three, among three adjacent batteries 100, among the battery 100 located in the middle and the battery 100 located at the lower side, the battery 100 located at the lower side is the first battery 101, and the battery 100 located in the middle is the second battery 102; while among the battery 100 located in the middle and the battery 100 located at the upper side, the battery 100 located in the middle is the first battery 101, and the battery 100 located at the upper side is the second battery 102, and so on. That is, the battery 100 located at the uppermost side can be provided with the avoidance structure 213 or not, and the other batteries 100 all need to be provided with the avoidance structure 213 to minimize the gap between the batteries 100 and improve the space utilization rate of the energy storage device 1000.

[0112] Of course, in other examples, some of the batteries 100 can be connected with the avoidance structure 213, and some of the batteries 100 are not provided with the avoidance structure 213, and the specific setting can be determined according to actual needs. At least one of the batteries 100 below the battery 100 located at the uppermost side can be connected with the avoidance structure 213, that is, at least one of the batteries 100 below the battery 100 located at the uppermost side is the first battery 101.

[0113] The energy storage device 1000 according to the embodiment of the present application, a plurality of supporting members 1300 are mounted on the supporting member 1200 along the first direction, and a plurality of batteries 100 in the battery pack 1100 are sequentially mounted on the supporting portions 1310 of the respective supporting members 1300 along the first direction, so that the plurality of batteries 100 form a multi-layer battery stacking structure; each battery 100 includes a box body 20 and a battery cell 10 disposed in the box body 20; and two adjacent batteries 100 are divided into a first battery 101 and a second battery 102, the supporting member 1300 for supporting the first battery 101 is a first supporting member 1301, and the supporting member 1300 for supporting the second battery 102 is a second supporting member 1302; a avoiding structure 213 for avoiding the supporting portion 1310 of the second supporting member 1302 is provided on the side portion of the box body 20 of the first battery 101 facing the second battery 102. The supporting portion 1310 of the second supporting member 1302 can be avoided by using the avoiding structure 213 of the first battery 101, so that other regions of the side portion of the box body 20 of the first battery 101 close to the second battery 102 except the avoiding structure 213 can move towards the second battery 102, thereby increasing the size of the first battery 101 in the first direction, improving the internal space of the box body 20 of the first battery 101. Since the internal space of the box body 20 of the first battery 101 is large, battery cells 10 with larger sizes and larger capacitances can be used, which is beneficial to improving the capacitance of the battery 100 and the energy storage device 1000; in addition, the gap between the batteries 100 can also be reduced, improving the space utilization rate and volume energy density in the energy storage device 1000.

[0114] In some embodiments, referring to Figure 1 and Figure 7 as shown, the battery 100 has a height direction, a length direction and a width direction. The height direction of the battery 100 can be parallel to the height direction of the energy storage device 1000, the width direction of the battery 100 can be parallel to the width direction of the energy storage device 1000, and the length direction of the battery 100 can be parallel to the length direction of the energy storage device 1000. With such an arrangement, the batteries 100 are arranged regularly, which is beneficial to the assembly of components. Among them, the box body 20 can define the outer shape of the battery 100. The height direction of the battery 100 can be the height direction of the box body 20, the width direction of the battery 100 can be the width direction of the box body 20, and the length direction of the battery 100 can be the length direction of the box body 20.

[0115] In some embodiments, the first direction is parallel to the height direction of the energy storage device 1000, the top wall of the box body 20 of the battery 100 can be lifted, the internal space of the box body 20 of the first battery 101 can be improved, and higher and larger-capacity battery cells 10 can be accommodated in the first battery 101, which is beneficial to improving the capacitance of the battery 100 and the energy storage device 1000.

[0116] In some embodiments, the first direction is parallel to the width direction or the length direction of the energy storage device 1000. The width or length of the box body 20 of the battery 100 can be correspondingly increased to improve the internal space of the box body 20 of the first battery 101. Larger-sized and larger-capacity battery cells 10 can be accommodated in the first battery 101, which is beneficial to increasing the capacitance of the battery 100 and the energy storage device 1000.

[0117] In some other embodiments of the present application, referring to Figures 1-6 As shown, the box body 20 of the first battery 101 includes a first side wall 211 and a second side wall 212. The first side wall 211 faces the support member 1200, and the second side wall 212 faces the second battery 102. An avoidance structure 213 is connected between the first side wall 211 and the second side wall 212. An avoidance space 201 for avoiding the supporting portion 1310 of the second supporting member 1302 is formed on the side of the avoidance structure 213 facing away from the battery cell 10.

[0118] The first side wall 211 may refer to the side wall of the box body 20 of the first battery 101 that is oppositely arranged with the support member 1200, and the second side wall 212 may refer to the side wall of the box body 20 of the first battery 101 that is oppositely arranged with the second battery 102; the avoidance structure 213 is connected between the first side wall 211 and the second side wall 212, so that the avoidance structure 213 is located at the edge of the side of the box body 20 of the first battery 101 close to the second battery 102.

[0119] Exemplarily, in the first battery 101, the first part 21 is a plate structure, and the second part 22 is a hollow structure with an opening at one end. The first part 21 is arranged close to the second battery 102. The second side wall 212 may be the middle area of the first part 21. The avoidance structure 213 is formed at the edge of the first part 21 close to the support member 1200. The first side wall 211 may be the side wall of the second part 22 close to the support member 1200; alternatively, the second side wall 212 is the first part 21, and the side wall of the second part 22 close to the support member 1200 forms the avoidance structure 213 at the end close to the opening, and the other areas of this side wall except the avoidance structure 213 may form the first side wall 211.

[0120] Exemplarily, referring to Figure 5 and Figure 7 As shown, in the first battery 101, the first part 21 is a hollow structure with an opening, and the second part 22 is a plate structure or a hollow structure with an opening at one end. The first part 21 is arranged close to the second battery 102. The second side wall 212 may be the top wall of the first part 21 oppositely arranged with the second part 22. The side wall of the first part 21 close to the support member 1200 forms the first side wall 211, and the avoidance structure 213 is formed at the edge of the top of the first part 21.

[0121] The avoidance space 201 may refer to the space formed by extending and intersecting the surface of the first side wall 211 facing away from the inside of the box body 20 (see the dashed line N in Figure 4 and Figure 6 ) and the surface of the second side wall 212 facing away from the inside of the box body 20 (see the dashed line M in Figure 4 and Figure 6 ), and jointly enclosed by the avoidance structure 213. That is, the avoidance space 201 is jointly enclosed by the dashed line M, the dashed line N, and the surface of the avoidance structure 213 facing away from the inside of the box body 20; this avoidance space 201 can be used to accommodate the supporting portion 1310 of the supporting member 1300 to reduce the risk of interference.

[0122] Exemplarily, as shown in Figures 3-6 , the top wall of the box body 20 forms the second side wall 212, the side wall of the box body 20 close to the support member 1200 forms the first side wall 211, and the avoidance structure 213 is located at the edge of the top of the box body 20 of the first battery 101. The boundary between the first side wall 211 and the avoidance structure 213 is the dashed line E, and the boundary between the second side wall 212 and the avoidance structure 213 is the dashed line F.

[0123] By adopting the technical solution of this embodiment, the avoidance structure 213 is located at the edge of the side of the box body 20 of the first battery 101 facing the second battery 102. In this way, most of the area of the box body 20 of the first battery 101 facing the second battery 102 can move towards the second battery 102, that is, the second side wall 212 can move towards the second battery 102. This can increase the internal space of the box body 20 of the first battery 101 to a large extent, so that larger-sized and higher-capacity battery cells 10 can be accommodated in the first battery 101, which is beneficial to improving the capacitance of the battery 100 and the energy storage device 1000; in addition, the gap between the batteries 100 can also be reduced, improving the space utilization rate and volume energy density in the energy storage device 1000.

[0124] In some other embodiments of the present application, as shown in Figures 3-6 , at least part of the supporting portion 1310 of the second supporting member 1302 is located in the avoidance space 201.

[0125] A part of the supporting portion 1310 of the second supporting member 1302 is located in the avoidance space 201, and another part of the supporting portion 1310 of the second supporting member 1302 is located outside the avoidance space 201; or, the entire supporting portion 1310 of the second supporting member 1302 is located in the avoidance space 201.

[0126] By adopting the technical solution of this embodiment, the supporting portion 1310 of the second supporting member 1302 is located within the avoidance space 201. The distance between the second supporting member 1302 and the second side wall 212 is closer, and the second side wall 212 can be closer to the second battery 102. A battery cell 10 with a larger size and larger capacity can be accommodated in the first battery 101, which is beneficial to increasing the capacitance of the battery 100 and the energy storage device 1000. Additionally, the gap between the batteries 100 can be better reduced, improving the space utilization rate within the energy storage device 1000.

[0127] In some other embodiments of the present application, refer to Figures 3-6 As shown, the distance between the side of the supporting portion 1310 of the second supporting member 1302 facing away from the supporting member 1200 and the supporting member 1200 is L1, and the distance between the second side wall 212 and the supporting member 1200 is L2, where L1 ≤ L2.

[0128] The distance L1 between the side of the supporting portion 1310 of the second supporting member 1302 facing away from the supporting member 1200 and the supporting member 1200 may refer to the distance between the side of the supporting portion 1310 of the second supporting member 1302 facing away from the supporting member 1200 and the side of the supporting member 1200 facing the battery 100.

[0129] The distance L2 between the second side wall 212 and the supporting member 1200 may refer to the distance between the side of the second side wall 212 facing the supporting member 1200 and the side of the supporting member 1200 facing the battery 100. Exemplarily, refer to Figure 4 As shown, the dashed line F may represent the side of the second side wall 212 facing the supporting member 1200, that is, L2 is equal to the distance between the dashed line F and the side of the supporting member 1200 facing the battery 100.

[0130] L1 ≤ L2. It can be understood that there is a gap between the second side wall 212 and the supporting member 1300 in the direction of the supporting member 1200 facing the first battery 101. Among them, the direction of the supporting member 1200 facing the first battery 101 can refer to the second direction.

[0131] By adopting the technical solution of this embodiment, in the direction of the supporting member 1200 facing the first battery 101, the second supporting member 1302 will not interfere with the second side wall 212, and the avoidance structure 213 has a good avoidance effect on the second supporting member 1302.

[0132] In some other embodiments of the present application, refer to Figures 3-6 As shown, the distance between the second side wall 212 and the second battery 102 is L3, and the dimension of the supporting portion 1310 of the second supporting member 1302 in the first direction is L4, where L3 < L4.

[0133] The distance L3 between the second side wall 212 and the second battery 102 may be the distance between the surface of the second side wall 212 facing the second battery 102 and the second battery 102.

[0134] The dimension L4 of the supporting portion 1310 of the second supporting member 1302 in the first direction may refer to the distance between the opposite two surfaces of the supporting portion 1310 of the second supporting member 1302 in the first direction.

[0135] L3 < L4. It can be understood that the second side wall 212 can extend into the avoidance space 201.

[0136] By adopting the technical solution of this embodiment, the supporting portion 1310 of the second supporting member 1302 is located in the avoidance space 201, making the second side wall 212 closer to the second battery 102, increasing the dimension of the box body 20 of the first battery 101 in the first direction. The internal space of the box body 20 of the battery 100 is large, and more large-size and large-capacity battery cells 10 can be accommodated in the first battery 101, which is beneficial to improving the capacitance of the battery 100 and the energy storage device 1000. In addition, the gap between the batteries 100 is also reduced, improving the space utilization rate in the energy storage device 1000.

[0137] In some other embodiments of the present application, refer to Figure 3 and Figure 4 As shown, the avoidance structure 213 includes an inclined section 2131. The inclined section 2131 is connected between the first side wall 211 and the second side wall 212. The inclined section 2131 extends obliquely from the end for connecting with the first side wall 211 towards the second side wall 212 and towards the inside of the box body 20.

[0138] The inclined section 2131 is inclined relative to the first side wall 211, and the inclined section 2131 is located on the side of the first side wall 211 facing away from the support member 1200, so that an avoidance space 201 is formed on the side of the inclined section 2131 facing away from the inside of the box body 20. That is to say, the distance between the end of the inclined section 2131 for connecting with the first side wall 211 and the support member 1200 is L5, and the distance between the end of the inclined section 2131 for connecting with the second side wall 212 and the support member 1200 is L6, where L5 < L6.

[0139] In the actual processing process, the avoidance structure 213 can be made by adopting a chamfering process; the included angle between the inclined section 2131 and the first side wall 211 is α, where 0° < α < 180°, and the value of α can be any value between 0° and 180°. By way of example, the value of α can be, but is not limited to, 1°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, 189°.

[0140] By adopting the technical solution of this embodiment, the avoidance structure 213 adopts the structure of the inclined section 2131, with a simple structure. The avoidance structure 213 is simple to form, which is beneficial to reducing the manufacturing cost of the box body 20.

[0141] In some other embodiments of the present application, refer to Figure 3 and Figure 4 As shown, the avoidance structure 213 further includes a first arc section 2132, and the first arc section 2132 is connected between the first side wall 211 and the inclined section 2131; and / or, the avoidance structure 213 further includes a second arc section 2133, and the second arc section 2133 is connected between the second side wall 212 and the inclined section 2131.

[0142] The first arc section 2132 may refer to the part of the avoidance structure 213 that is connected between the first side wall 211 and the inclined section 2131; the shape of the first arc section 2132 can be various, such as: circular arc, elliptical arc, etc. By way of example, refer to Figure 5 As shown, the first arc section 2132 and the inclined section 2131 are separated by a dotted line H. L5 may refer to the distance between the dotted line H and the support member 1200.

[0143] The second arc section 2133 may refer to the part of the avoidance structure 213 that is connected between the second side wall 212 and the inclined section 2131; the shape of the second arc section 2133 can be various, such as: circular arc, elliptical arc, etc. By way of example, refer to Figure 5 As shown, the second side wall 212 and the avoidance structure 213 are separated by a dotted line G. L5 may refer to the distance between the dotted line G and the support member 1200.

[0144] In a possible implementation manner, the avoidance structure 213 further includes a first arc section 2132, and the first arc section 2132 is connected between the first side wall 211 and the inclined section 2131; the first arc section 2132 can be smoothly and transitionally connected to the first side wall 211 and the inclined section 2131, which is beneficial to reducing stress concentration, improving the structural reliability of the box body 20, and improving the use reliability of the battery 100.

[0145] In another possible embodiment, the avoidance structure 213 further includes a second arc segment 2133, and the second arc segment 2133 is connected between the second side wall 212 and the inclined segment 2131; the second arc segment 2133 can be smoothly connected to the second side wall 212 and the inclined segment 2131, which is beneficial to reducing stress concentration, improving the structural reliability of the box body 20, and improving the use reliability of the battery 100.

[0146] In yet another possible embodiment, the avoidance structure 213 further includes a first arc segment 2132, the first arc segment 2132 is connected between the first side wall 211 and the inclined segment 2131, the avoidance structure 213 further includes a second arc segment 2133, and the second arc segment 2133 is connected between the second side wall 212 and the inclined segment 2131; the first arc segment 2132 can be smoothly connected to the first side wall 211 and the inclined segment 2131, and the second arc segment 2133 can be smoothly connected to the second side wall 212 and the inclined segment 2131, which is beneficial to reducing stress concentration, improving the structural reliability of the box body 20, and improving the use reliability of the battery 100.

[0147] By adopting the technical solution of this embodiment, it is beneficial to reduce stress concentration, improve the structural reliability of the box body 20, improve the use reliability of the battery 100, and is also convenient for processing and forming.

[0148] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the avoidance structure 213 is recessed towards the inside of the box body 20 to form an avoidance notch 202, and the avoidance notch 202 forms an avoidance space 201.

[0149] From the outer shape of the box body 20, a recessed structure is formed between the first side wall 211 and the second side wall 212 of the box body 20, and this recessed structure is the avoidance structure 213; the avoidance structure 213 is recessed towards the inside of the box body 20, and the space formed by the recess is the avoidance notch 202, that is, the avoidance space 201. The cross-sectional shape of the avoidance structure 213 can be arc-shaped, or can be a broken line shape, or can also be a mixture of a broken line shape and an arc shape. Of course, it can also refer to other structures.

[0150] By adopting the technical solution of this embodiment, the avoidance structure 213 is recessed towards the inside of the box body 20 to obtain the avoidance space 201, and the processing and manufacturing of the avoidance structure 213 are convenient.

[0151] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the avoidance structure 213 includes a bending segment 2134, the bending segment 2134 is connected between the first side wall 211 and the second side wall 212, and the bending segment 2134 encloses to form an avoidance notch 202.

[0152] The bent section 2134 protrudes towards the inside of the box body 20. The bent section 2134 has a multi-segment structure. The bent section 2134 includes a plurality of straight sub-segments connected in sequence, and the straight sub-segments are straight; the included angle formed between two adjacent straight sub-segments is β, where 0° < β < 180°, and the value of β can be any value between 0° and 180°. By way of example, the value of β can be, but is not limited to, 1°, 5°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170, 179°.

[0153] By adopting the technical solution of this embodiment, the avoidance structure 213 adopts a bent structure, and the processing and forming of the box body 20 are simple.

[0154] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the bent section 2134 includes an intersecting first straight sub-segment 21341 and a second straight sub-segment 21342. The first straight sub-segment 21341 is connected between the first side wall 211 and the second straight sub-segment 21342, and the second straight sub-segment 21342 is connected between the first straight sub-segment 21341 and the second side wall 212.

[0155] The bent section 2134 includes two straight sub-segments. One of the straight sub-segments is the first straight sub-segment 21341, and the other straight sub-segment is the second straight sub-segment 21342. The first straight sub-segment 21341 is connected to the first side wall 211, and the second straight sub-segment 21342 is connected to the second side wall 212.

[0156] By adopting the technical solution of this embodiment, the bent section 2134 adopts the structure of the first straight sub-segment 21341 and the second straight sub-segment 21342, and its structure is simple, and the processing and forming of the box body 20 are even simpler.

[0157] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the first straight sub-segment 21341 is perpendicular to the second straight sub-segment 21342.

[0158] It can be understood that the first straight sub-segment 21341 is perpendicular or nearly perpendicular to the first side wall 211, such that the bending segment 2134 has a stepped structure; exemplarily, the angle β between the first straight sub-segment 21341 and the second straight sub-segment 21342 ranges from 80° to 100°, wherein the value of β can be 80°, 100°, and any value between 80° and 100°. The value of the angle β between the first straight sub-segment 21341 and the second straight sub-segment 21342 can be, but is not limited to, 80°, 82°, 84°, 86°, 88°, 90°, 92°, 94°, 96°, 92°, 100°.

[0159] By adopting the technical solution of this embodiment, the shape of the bending segment 2134 is regular, and the processing and forming of the box body 20 are simpler.

[0160] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the bending segment 2134 further includes an arc-shaped sub-segment 21343, and the arc-shaped sub-segment 21343 is connected between the first straight sub-segment 21341 and the second straight sub-segment 21342.

[0161] The arc-shaped sub-segment 21343 may refer to a segment connected between the first straight sub-segment 21341 and the second straight sub-segment 21342, and the shape of this segment is arc-shaped, for example: circular arc-shaped, elliptical arc-shaped, etc.

[0162] By adopting the technical solution of this embodiment, the arc-shaped sub-segment 21343 can smoothly connect the first straight sub-segment 21341 and the second straight sub-segment 21342, which is beneficial to reducing stress concentration, improving the structural reliability of the box body 20, improving the use reliability of the battery 100, and also facilitating processing and forming.

[0163] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the first straight sub-segment 21341 is perpendicular to the first side wall 211, and / or the second straight sub-segment 21342 is perpendicular to the second side wall 212.

[0164] The first straight sub-segment 21341 is perpendicular to the first side wall 211. It can be understood that the first straight sub-segment 21341 is perpendicular or nearly perpendicular to the first side wall 211; exemplarily, the angle between the first straight sub-segment 21341 and the first side wall 211 is γ1, and 90° ≤ γ1 ≤ 100°; the value of γ1 can be 80°, 100°, and any value between 80° and 100°; γ1 can be, but is not limited to, 80°, 82°, 84°, 86°, 88°, 90°, 92°, 94°, 96°, 92°, 100°.

[0165] The second straight sub-segment 21342 is perpendicular to the second side wall 212. It can be understood that the second straight sub-segment 21342 is perpendicular or nearly perpendicular to the second side wall 212. Exemplarily, the included angle between the second straight sub-segment 21342 and the second side wall 212 is γ2, and 90° ≤ γ2 ≤ 100°. The value of γ2 can be 80°, 100°, and any value between 80° and 100°. The value of γ2 can be, but is not limited to, 80°, 82°, 84°, 86°, 88°, 90°, 92°, 94°, 96°, 98°, 100°.

[0166] In a possible implementation manner, the first straight sub-segment 21341 is perpendicular to the first side wall 211. The first straight sub-segment 21341 and the first side wall 211 can form a stepped structure, with a regular structure, and the processing and forming of the box body 20 are simpler.

[0167] In another possible implementation manner, the second straight sub-segment 21342 is perpendicular to the second side wall 212. The second straight sub-segment 21342 and the second side wall 212 can form a stepped structure, with a regular structure, and the processing and forming of the box body 20 are simpler.

[0168] In another possible implementation manner, the first straight sub-segment 21341 is perpendicular to the first side wall 211, and the second straight sub-segment 21342 is perpendicular to the second side wall 212. The second straight sub-segment 21342, the second side wall 212, the first straight sub-segment 21341, and the second side wall 212 can form a stepped structure, with a regular structure, and the processing and forming of the box body 20 are simpler.

[0169] By adopting the technical solution of this embodiment, the structure of the box body 20 at the avoidance structure 213 is regular, and the processing and forming of the box body 20 are simpler.

[0170] In other embodiments of the present application, refer to Figures 3-6 As shown, the battery cell 10 in the first battery 101 has a first end face 12 facing the second battery 102. The first end face 12 is provided with electrode terminals 11. The orthographic projection of the avoidance structure 213 on the first end face 12 is staggeredly arranged with the orthographic projection of the part where the electrode terminals 11 protrude from the first end face 12 on the first end face 12.

[0171] Electrode terminals 11 will be provided on the outer shell of the battery cell 10. The electrode terminals 11 refer to conductive parts provided on the outer shell. The electrode terminals 11 are connected to the tabs of the electrode assembly to output the electrical energy of the battery cell 10 or charge the battery cell 10. Generally, there are two electrode terminals 11 for the battery cell 10. The two electrode terminals 11 are respectively connected to the positive and negative tabs of the electrode assembly. The electrode terminal 11 connected to the positive tab is the positive electrode terminal 11, and the electrode terminal 11 connected to the negative tab is the negative electrode terminal 11.

[0172] In the battery cell 10 of the first battery 101, the end face of the battery cell 10 facing the second battery 102 is the first end face 12. The electrode terminal 11 is provided on the first end face 12, and at least a part of the electrode terminal 11 protrudes from this end face. The electrode terminal 11 may be partially located inside the housing and the other part protrudes from the first end face 12, or the electrode terminal 11 may be entirely located between the first end face 12 and the second battery 102.

[0173] The orthographic projection of the avoidance structure 213 on the first end face 12 may refer to the projection image of the avoidance structure 213 on the first end face 12 along the direction perpendicular to the first end face 12; the part of the electrode terminal 11 protruding from the first end face 12 in the orthographic projection on the first end face 12 may refer to the projection image of the part of the electrode terminal 11 protruding from the first end face 12 on the first end face 12 along the direction perpendicular to the first end face 12. These two projection images do not intersect and are arranged staggeredly; in the first battery 101, the avoidance structure 213 is located on the side of the electrode terminal 11 facing the support 1200. The electrode terminal 11 and the avoidance structure 213 are staggered, and the electrode terminal 11 is disposed opposite to other regions of the box body 20 except the avoidance structure 213, which can reduce the interference risk between the electrode terminal 11 and the avoidance structure 213, and reduce the limitation on the increase in the size of the battery cell 10 in the first direction due to the interference between the electrode terminal 11 and the avoidance structure 213, which is more conducive to increasing the size of the battery cell 10 in the first direction.

[0174] Exemplarily, the electrode terminal 11 is disposed opposite to the second side wall 212. Then, after the second side wall 212 moves towards the second battery 102, the electrode terminal 11 and the first end face 12 can also move towards the second battery 102, so that a battery cell 10 with a larger size and larger capacity in the first direction can be selected and placed in the box body 20, which is beneficial to increasing the capacitance of the battery 100 and the energy storage device 1000.

[0175] By adopting the technical solution of this embodiment, in the first battery 101, the electrode terminal 11 and the avoidance structure 213 are staggered, and the electrode terminal 11 is disposed opposite to other regions of the side portion of the box body 20 facing the second battery 102 except the avoidance structure 213. Then, after the other regions of the side portion of the box body 20 facing the second battery 102 except the avoidance structure 213 move towards the second battery 102, the electrode terminal 11 and the first end face 12 can also move towards the second battery 102, so that a battery cell 10 with a larger size and larger capacity in the first direction can be selected and placed in the box body 20, which is beneficial to increasing the capacitance of the battery 100 and the energy storage device 1000.

[0176] In some other embodiments of the present application, refer to Figures 3-6As shown, each supporting member 1300 further includes a connecting portion 1320, and the supporting portion 1310 is connected to the connecting portion 1320 at a side portion in the first direction.

[0177] The supporting member 1300 includes two parts. The part for supporting a part of the battery 100 is the supporting portion 1310, and the part for connecting to the supporting member 1200 is the connecting portion 1320. The connecting portion 1320 is located on one of the two relatively arranged side portions of the supporting portion 1310 in the first direction. Exemplarily, the connecting portion 1320 of the second supporting member 1302 and the second battery 102 are on the same side or opposite sides of the supporting portion 1310 of the second supporting member 1302. The connecting portion 1320 of the first supporting member 1301 and the first battery 101 are on the same side or opposite sides of the supporting portion 1310 of the first supporting member 1301. The connecting portion 1320 of the first supporting member 1301 is located between the first battery 101 and the supporting member 1200, and the connecting portion 1320 of the second supporting member 1302 is located between the second battery 102 and the supporting member 1200.

[0178] Exemplarily, the supporting member 1300 can be formed by bending a plate member. After the plate member is bent, the connecting portion 1320 and the supporting portion 1310 are formed. The cross-sectional shape of the supporting member 1300 can be various, for example: right-angled, obtuse-angled, acute-angled, etc.

[0179] By adopting the technical solution of this embodiment, the connecting portion 1320 can increase the connection area between the supporting member 1300 and the supporting member 1200, and can improve the reliability of supporting the battery 100.

[0180] In some other embodiments of the present application, refer to Figures 3-6 As shown, the connecting portion 1320 and the battery 100 supported on the supporting portion 1310 are on the same side of the supporting portion 1310.

[0181] The connecting portion 1320 and the battery 100 supported on the supporting portion 1310 are on the same side of the supporting portion 1310. Exemplarily, the connecting portion 1320 of the second supporting member 1302 is located between the second battery 102 and the supporting member 1200, and the connecting portion 1320 of the first supporting member 1301 is located between the first battery 101 and the supporting member 1200.

[0182] By adopting the technical solution of this embodiment, the connecting portion 1320 of the supporting member 1300 is located between the battery 100 supported on the connecting portion 1320 of this supporting member 1300 and the supporting member 1200. In this way, the interference risk of the connecting portion 1320 of this supporting member 1300 to other batteries 100 can be reduced, which is beneficial to reducing the distance between the batteries 100 and beneficial to the compactness of the energy storage device 1000.

[0183] In some other embodiments of the present application, refer toFigure 1 , Figure 8 and Figure 9 As shown in Figure 1 , Figure 8 and Figure 9 , the number of the support members 1200 is multiple. The multiple support members 1200 are arranged at intervals in the second direction. A battery pack 1100 is provided between two adjacent support members 1200. A supporting member 1300 is provided on the opposite side portions of two adjacent support members 1200 facing each other. The opposite sides of the box body 20 of the first battery 101 in the second direction are connected with avoidance structures 213. The second direction is perpendicular to the first direction.

[0184] The number of the support members 1200 is multiple. The number between the support members 1200 may be, but is not limited to, two, three or more than four. The multiple support members 1200 are arranged at intervals in the second direction, so that a receiving space is formed between two adjacent support members 1200. The receiving space can accommodate the battery pack 1100. Among them, there may be multiple receiving spaces, and the number of the battery packs 1100 is also multiple, which can increase the storage capacitance of the energy storage device 1000 to meet a greater energy storage demand.

[0185] A supporting member 1300 is provided on the opposite side portions of two adjacent support members 1200 facing each other. In this way, the supporting member 1300 can support the opposite sides of the battery 100 in the battery pack 1100 in the second direction, improving the supporting stability of the battery 100. Among them, it may be that a battery pack 1100 is provided between all adjacent support members 1200, two battery packs 1100 share one support member 1200, and supporting members 1300 are provided on both opposite sides of the support member 1200; or it may be that two support members 1200 support one battery pack 1100, the battery packs 1100 do not share the support member 1200, and a supporting member 1300 is provided on one side of the support member 1200.

[0186] Avoidance structures 213 are connected to both opposite sides of the battery 100 of the first battery 101 in the second direction. In this way, the two avoidance structures 213 can avoid the two supporting members 1300 for supporting the second battery 102.

[0187] By adopting the technical solution of this embodiment, the supporting member 1300 between two adjacent support members 1200 can support the opposite sides of the battery 100 in the battery pack 1100 in the second direction, improving the supporting stability of the battery 100.

[0188] In some other embodiments of the present application, refer to Figure 1 , Figure 8 and Figure 9As shown, the support member 1200 includes a first support portion 1210 and a second support portion 1220. The first support portion 1210 and the second support portion 1220 are arranged along a third direction. Opposite ends of the carrier member 1300 along the third direction are respectively connected to the first support portion 1210 and the second support portion 1220. The third direction is perpendicular to the first direction and the second direction.

[0189] The support member 1200 is divided into two parts along the third direction. One part is the first support portion 1210, and the other part is the second support portion 1220.

[0190] Exemplarily, referring to Figure 1 As shown, the support member 1200 includes two vertical rods. The two vertical rods are arranged at intervals along the third direction. One of the vertical rods is the first support portion 1210, and the other vertical rod is the second support portion 1220.

[0191] Exemplarily, referring to Figure 8 As shown, the support member 1200 can be a plate member. Two side walls of the plate member arranged oppositely along the third direction. One side portion is the first support portion 1210, and the other side portion is the second support portion 1220.

[0192] One of the two end portions of the carrier member 1300 distributed oppositely along the third direction is connected to the first support portion 1210, and the other end portion is connected to the second support portion 1220.

[0193] By adopting the technical solution of this embodiment, the carrier member 1300 can have a relatively long dimension in the third direction. The battery 100 can be supported over a large area in the third direction, and the support stability of the battery 100 is good. In addition, both ends of the carrier member 1300 are connected to the support member 1200. There are many connection positions between the support member 1200 and the carrier member 1300, and the connection reliability is good, which is beneficial to improving the use reliability of the energy storage device 1000.

[0194] The energy storage device 1000 will be described below in conjunction with some embodiments.

[0195] Embodiment 1

[0196] In this embodiment, referring to Figures 1-4 and Figure 7As shown, the energy storage device 1000 includes a support member 1200, a battery pack 1100, and a plurality of supporting members 1300. The plurality of supporting members 1300 are spaced apart and installed on the side of the support member 1200 in a first direction. Each supporting member 1300 includes a supporting portion 1310. The battery pack 1100 includes a plurality of batteries 100, and the plurality of batteries 100 are sequentially installed on the supporting portions 1310 of the respective supporting members 1300 in the first direction. The supporting portion 1310 is located between two adjacent batteries 100. Each battery 100 includes a box body 20 and battery cells 10 disposed within the box body 20. Two adjacent batteries 100 are divided into a first battery 101 and a second battery 102. The supporting member 1300 for supporting the first battery 101 is a first supporting member 1301, and the supporting member 1300 for supporting the second battery 102 is a second supporting member 1302. An avoidance structure 213 is provided on the side of the box body 20 of the first battery 101 facing the second battery 102 for avoiding the supporting portion 1310 of the second supporting member 1302.

[0197] In this embodiment, the box body 20 of the first battery 101 includes a first side wall 211 and a second side wall 212. The first side wall 211 faces the support member 1200, and the second side wall 212 faces the second battery 102. The avoidance structure 213 is connected between the first side wall 211 and the second side wall 212. An avoidance space 201 for avoiding the supporting portion 1310 of the second supporting member 1302 is formed on the side of the avoidance structure 213 facing away from the battery cells 10.

[0198] In this embodiment, at least a part of the supporting portion 1310 of the second supporting member 1302 is located within the avoidance space 201.

[0199] In this embodiment, the distance between the side surface of the supporting portion 1310 of the second supporting member 1302 facing away from the support member 1200 and the support member 1200 is L1, and the distance between the second side wall 212 and the support member 1200 is L2, where L1 ≤ L2.

[0200] In this embodiment, the distance between the second side wall 212 and the second battery 102 is L3, and the dimension of the supporting portion 1310 of the second supporting member 1302 in the first direction is L4, where L3 < L4.

[0201] In this embodiment, the avoidance structure 213 includes an inclined section 2131. The inclined section 2131 is connected between the first side wall 211 and the second side wall 212, and the inclined section 2131 extends obliquely from the end for connecting with the first side wall 211 towards the second side wall 212 and towards the inside of the box body 20.

[0202] In this embodiment, the avoidance structure 213 further includes a first arc segment 2132, and the first arc segment 2132 is connected between the first side wall 211 and the inclined segment 2131; and / or, the avoidance structure 213 further includes a second arc segment 2133, and the second arc segment 2133 is connected between the second side wall 212 and the inclined segment 2131.

[0203] In this embodiment, the battery cell 10 in the first battery 101 has a first end face 12 facing the second battery 102, and an electrode terminal 11 is provided on the first end face 12. The orthographic projection of the avoidance structure 213 on the first end face 12 is staggered from the part of the electrode terminal 11 protruding from the first end face 12 in the orthographic projection on the first end face 12.

[0204] In this embodiment, each supporting member 1300 further includes a connecting portion 1320, and the supporting portion 1310 is connected to the connecting portion 1320 at a side portion in the first direction.

[0205] In this embodiment, the connecting portion 1320 and the battery 100 supported on the supporting portion 1310 are on the same side of the supporting portion 1310.

[0206] In this embodiment, the number of the supporting members 1200 is multiple, and the multiple supporting members 1200 are arranged at intervals along the second direction. A battery pack 1100 is provided between two adjacent supporting members 1200, and supporting members 1300 are provided at side portions of two adjacent supporting members 1200 facing each other; Avoidance structures 213 are connected to opposite sides of the box body 20 of the first battery 101 along the second direction, and the second direction is perpendicular to the first direction.

[0207] In this embodiment, the supporting member 1200 includes a first supporting portion 1210 and a second supporting portion 1220, the first supporting portion 1210 and the second supporting portion 1220 are arranged along the third direction, and opposite ends of the supporting member 1300 along the third direction are respectively connected to the first supporting portion 1210 and the second supporting portion 1220, and the third direction is perpendicular to the first direction and the second direction.

[0208] Embodiment Two

[0209] The difference between this embodiment and Embodiment One lies in: Refer to Figure 5 and Figure 6 As shown, the avoidance structure 213 is recessed towards the inside of the box body 20 to form an avoidance notch 202, and the avoidance notch 202 forms an avoidance space 201.

[0210] In this embodiment, the avoidance structure 213 includes a bending segment 2134, and the bending segment 2134 is connected between the first side wall 211 and the second side wall 212, and the bending segment 2134 encloses to form the avoidance notch 202.

[0211] In this embodiment, the bent section 2134 includes a first straight sub-section 21341 and a second straight sub-section 21342 that intersect. The first straight sub-section 21341 is connected between the first side wall 211 and the second straight sub-section 21342, and the second straight sub-section 21342 is connected between the first straight sub-section 21341 and the second side wall 212.

[0212] In this embodiment, the first straight sub-section 21341 is perpendicular to the second straight sub-section 21342.

[0213] In this embodiment, the bent section 2134 further includes an arc-shaped sub-section 21343, and the arc-shaped sub-section 21343 is connected between the first straight sub-section 21341 and the second straight sub-section 21342.

[0214] In this embodiment, the first straight sub-section 21341 is perpendicular to the first side wall 211, and / or the second straight sub-section 21342 is perpendicular to the second side wall 212.

[0215] The battery 100 of the embodiment of the present application will be described below.

[0216] In some other embodiments of the present application, refer to Figures 1-7 As shown, a battery 100 is provided. The battery 100 includes a box body 20 and battery cells 10. The battery cells 10 are located inside the box body 20. The box body 20 includes a first side wall 211, a second side wall 212, and a third side wall 221. The second side wall 212 and the third side wall 221 are arranged at intervals in a first direction. The battery cells 10 are located between the second side wall 212 and the third side wall 221. The first side wall 211 is located between the second side wall 212 and the third side wall 221. An avoidance structure 213 is connected between the first side wall 211 and the second side wall 212, and an avoidance space 201 is formed on the side of the avoidance structure 213 facing away from the interior of the box body 20.

[0217] Refer to Figure 7 As shown, the first direction can refer to the height direction of the battery 100, and the second direction can refer to the width direction of the battery 100.

[0218] The second side wall 212 may refer to the top wall of the box body 20, the third side wall 221 may refer to the bottom wall of the box body 20, and the first side wall 211 may refer to the side wall of the box body 20 located between the bottom wall and the top wall. The battery cells 10 are located inside the box body 20. The battery cells 10 are located between the second side wall 212 and the third side wall 221. The battery cells 10 can be installed on the third side wall 221, and the third side wall 221 plays a supporting role for the battery cells 10. The box body 20 mainly plays a protective role for the battery cells 10. The battery cells 10 are the smallest storage units inside the battery 100. The battery cells 10 can store and release the battery 100, enabling the battery 100 to be used as a power source.

[0219] Exemplarily, the first part 21 is a plate structure, the second part 22 is a hollow structure with an opening at one end, and the first part 21 is located on the upper side of the second part 22; the second side wall 212 can be the middle area of the first part 21, and the edge of the first part 21 forms an avoidance structure 213. The first side wall 211 is the side wall of the second part 22, and the third side wall 221 can be the side wall of the second part 22 opposite to the first part 21, that is, the bottom wall of the box body 20; or, the second side wall 212 is the first part 21, and the end of the side wall of the second part 22 close to the opening forms an avoidance structure 213, and the other area of this side wall except the avoidance structure 213 forms the first side wall 211, and the third side wall 221 can be the side wall of the second part 22 opposite to the first part 21.

[0220] Exemplarily, referring to Figure 5 and Figure 7 As shown in, the first part 21 is a hollow structure with an opening, the second part 22 is a plate structure or a hollow structure with an opening at one end, and the first part 21 is located on the upper side of the second part 22; the second side wall 212 can be the top wall of the first part 21 arranged opposite to the second part 22, and the upper end of the side wall of the first part 21 forms an avoidance structure 213, and the other area of this side wall except the avoidance structure 213 forms the first side wall 211, and the third side wall 221 can be the side wall of the second part 22 opposite to the first part 21 or the second part 22.

[0221] During the installation of the battery 100 of the embodiment of the present application into the energy storage device 1000, after a plurality of batteries 100 are installed on the supporting part 1310 of the supporting member 1300 of the energy storage device 1000 along the first direction, the second side wall 212 faces the adjacent battery 100, the third side wall 221 is supported on the supporting part 1310 of the supporting member 1300, the first side wall 211 and the supporting member 1300 are on the same side of the battery 100, and the avoidance space 201 formed by the avoidance structure 213 connected between the first side wall 211 and the second side wall 212 can be used to accommodate the supporting part 1310 of the supporting member 1300 that supports the adjacent battery 100. In this way, the second side wall 212 of the battery 100 can move towards the adjacent battery 100, thereby increasing the internal space of the box body 20 of the battery 100, so that larger-sized and higher-capacity battery cells 10 can be accommodated in the battery 100, which is beneficial to increasing the capacitance of the battery 100 and the energy storage device 1000; in addition, the gap between the batteries 100 can also be reduced, improving the space utilization rate and volume energy density in the energy storage device 1000.

[0222] In some other embodiments of the present application, referring to Figure 3 、 Figure 4 and Figure 7As shown, the avoidance structure 213 includes an inclined section 2131. The inclined section 2131 is connected between the first side wall 211 and the second side wall 212. The inclined section 2131 extends obliquely toward the second side wall 212 and into the box body 20 from the end for connecting with the first side wall 211 of the inclined section 2131.

[0223] By adopting the technical solution of this embodiment, the avoidance structure 213 adopts the structure of the inclined section 2131, with a simple structure. The avoidance structure 213 is simple to form, which is beneficial to reducing the manufacturing cost of the box body 20.

[0224] In some other embodiments of the present application, refer to Figure 3 and Figure 4 As shown, the avoidance structure 213 further includes a first arc section 2132, and the first arc section 2132 is connected between the first side wall 211 and the inclined section 2131; and / or, the avoidance structure 213 further includes a second arc section 2133, and the second arc section 2133 is connected between the second side wall 212 and the inclined section 2131.

[0225] By adopting the technical solution of this embodiment, it is beneficial to reduce stress concentration, improve the structural reliability of the box body 20, improve the use reliability of the battery 100, and is also convenient for processing and forming.

[0226] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the avoidance structure 213 is recessed into the box body 20 to form an avoidance notch 202, and the avoidance notch 202 forms an avoidance space 201.

[0227] By adopting the technical solution of this embodiment, the avoidance structure 213 is recessed into the box body 20 to obtain the avoidance space 201, and the processing and manufacturing of the avoidance structure 213 are convenient.

[0228] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the avoidance structure 213 includes a bent section 2134, and the bent section 2134 is connected between the first side wall 211 and the second side wall 212, and the bent section 2134 encloses to form an avoidance notch 202.

[0229] By adopting the technical solution of this embodiment, the avoidance structure 213 adopts a bent structure, and the processing and forming of the box body 20 are simple.

[0230] In some other embodiments of the present application, refer to Figure 5 and Figure 6As shown, the bent section 2134 includes an intersecting first straight sub-section 21341 and a second straight sub-section 21342. The first straight sub-section 21341 is connected between the first side wall 211 and the second straight sub-section 21342, and the second straight sub-section 21342 is connected between the first straight sub-section 21341 and the second side wall 212.

[0231] By adopting the technical solution of this embodiment, the bent section 2134 adopts the structure of the first straight sub-section 21341 and the second straight sub-section 21342, with a simple structure, and the processing and forming of the box body 20 are simpler.

[0232] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the first straight sub-section 21341 is perpendicular to the second straight sub-section 21342.

[0233] By adopting the technical solution of this embodiment, the shape of the bent section 2134 is regular, and the processing and forming of the box body 20 are simpler.

[0234] In some other embodiments of the present application, refer to Figure 6 and Figure 7 As shown, the bent section 2134 further includes an arc-shaped sub-section 21343, and the arc-shaped sub-section 21343 is connected between the first straight sub-section 21341 and the second straight sub-section 21342.

[0235] By adopting the technical solution of this embodiment, the arc-shaped sub-section 21343 can smoothly connect the first straight sub-section 21341 and the second straight sub-section 21342, which is beneficial to reducing stress concentration, improving the structural reliability of the box body 20, improving the service reliability of the battery 100, and also facilitating processing and forming.

[0236] In some other embodiments of the present application, refer to Figure 5 and Figure 6 As shown, the first straight sub-section 21341 is perpendicular to the first side wall 211, and / or the second straight sub-section 21342 is perpendicular to the second side wall 212.

[0237] By adopting the technical solution of this embodiment, the structure of the box body 20 at the avoidance structure 213 is regular, and the processing and forming of the box body 20 are simpler.

[0238] In some other embodiments of the present application, refer to Figures 3-6 As shown, the battery cell 10 has a first end face 12 facing the second side wall 212. The first end face 12 is provided with electrode terminals 11, and the orthographic projection of the avoidance structure 213 on the first end face 12 is staggered from the orthographic projection of the part where the electrode terminals 11 protrude from the first end face 12 on the first end face 12.

[0239] The end face of the outer shell of the battery cell 10 facing the second side wall 212 is the first end face 12, the electrode terminal 11 is arranged on the first end face 12, and at least part of the electrode terminal 11 protrudes from the end face. The electrode terminal 11 can be partially located in the outer shell and the other part protrudes from the first end face 12, or the electrode terminal 11 can be completely located between the first end face 12 and the second side wall 212.

[0240] By adopting the technical solution of this embodiment, the electrode terminal 11 is staggered with the avoidance structure 213, and the electrode terminal 11 is arranged opposite to the second side wall 212. Then, after the second side wall 212 moves toward the second battery 102, the electrode terminal 11 and the first end face 12 can also move toward the second battery 102, so that a battery cell 10 with a larger size and a larger capacity in the first direction can be selected to be placed in the box body 20, which is beneficial to increasing the capacity of the battery 100 and the energy storage device 1000.

[0241] In other embodiments of the present application, see Figure 7 As shown, the second side wall 212 is connected with avoidance structures 213 on two opposite sides along a second direction, and the second direction is perpendicular to the first direction.

[0242] By adopting the technical solution of this embodiment, the two opposite sides of the second reserve distributed along the second direction are connected with avoidance structures 213. The two avoidance structures 213 can avoid the supporting parts 1310 of the two supporting members 1300 for supporting adjacent batteries 100, so that the second side wall 212 can be better close to the adjacent battery 100 to increase the internal space of the box body 20, so that the battery cell 10 with a larger size and larger capacity in the first direction can be selected to be placed in the box body 20, which is beneficial to increase the capacity of the battery 100 and the energy storage device 1000.

[0243] The battery 100 of the present application is described below in conjunction with some embodiments.

[0244] Embodiment 3

[0245] In this embodiment, see Figures 1-4 and Figure 7 As shown, the battery 100 includes a box body 20 and a battery cell 10; the box body 20 includes a first side wall 211, a second side wall 212 and a third side wall 221, the second side wall 212 and the third side wall 221 are arranged at intervals along the first direction, the battery cell 10 is installed on the third side wall 221, the battery cell 10 is located between the second side wall 212 and the third side wall 221, the first side wall 211 is located between the second side wall 212 and the third side wall 221, an avoidance structure 213 is connected between the first side wall 211 and the second side wall 212, and an avoidance space 201 is formed on the side of the avoidance structure 213 facing away from the inside of the box body 20.

[0246] In this embodiment, the avoidance structure 213 includes an inclined section 2131. The inclined section 2131 is connected between the first side wall 211 and the second side wall 212, and extends obliquely toward the second side wall 212 and into the box body 20 from the end of the inclined section 2131 for connecting to the first side wall 211.

[0247] In this embodiment, the avoidance structure 213 further includes a first arc section 2132 connected between the first side wall 211 and the inclined section 2131; and / or, the avoidance structure 213 further includes a second arc section 2133 connected between the second side wall 212 and the inclined section 2131.

[0248] In this embodiment, the battery cell 10 has a first end face 12 facing the second side wall 212. The electrode terminal 11 is provided on the first end face 12. The orthographic projection of the avoidance structure 213 on the first end face 12 is staggered from the orthographic projection of the part where the electrode terminal 11 protrudes from the first end face 12 on the first end face 12.

[0249] In this embodiment, avoidance structures 213 are connected to opposite sides along the second direction of the second side wall 212, and the second direction is perpendicular to the first direction.

[0250] Embodiment Four

[0251] The difference between this embodiment and Embodiment Three is as follows: Refer to Figure 5 and Figure 6 As shown, the avoidance structure 213 is recessed into the box body 20 to form an avoidance notch 202, and the avoidance notch 202 forms an avoidance space 201.

[0252] In this embodiment, the avoidance structure 213 includes a bent section 2134. The bent section 2134 is connected between the first side wall 211 and the second side wall 212, and the bent section 2134 encloses to form the avoidance notch 202.

[0253] In this embodiment, the bent section 2134 includes an intersecting first straight sub-section 21341 and a second straight sub-section 21342. The first straight sub-section 21341 is connected between the first side wall 211 and the second straight sub-section 21342, and the second straight sub-section 21342 is connected between the first straight sub-section 21341 and the second side wall 212.

[0254] In this embodiment, the first straight sub-section 21341 is perpendicular to the second straight sub-section 21342.

[0255] In this embodiment, the bent section 2134 further includes an arc sub-section 21343 connected between the first straight sub-section 21341 and the second straight sub-section 21342.

[0256] In this embodiment, the first straight sub-segment 21341 is perpendicular to the first side wall 211, and / or the second straight sub-segment 21342 is perpendicular to the second side wall 212.

[0257] The descriptions of the above embodiments tend to emphasize the differences between the embodiments. For the similarities, reference can be made to each other. For the sake of brevity, they will not be elaborated herein.

[0258] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that: include, Supports; A plurality of supporting members are installed at intervals on the side of the support member along the first direction, each of the supporting members comprising a supporting portion; A battery pack, the battery pack comprising a plurality of batteries, the plurality of batteries being sequentially mounted on the supporting parts of the supporting members along the first direction, the supporting parts being located between two adjacent batteries; each battery comprising a box body and a battery cell disposed in the box body; two adjacent batteries are respectively a first battery and a second battery, the supporting member for supporting the first battery is a first supporting member, and the supporting member for supporting the second battery is a second supporting member; A side portion of the box body of the first battery facing the second battery is provided with an avoidance structure for avoiding the supporting portion of the second supporting member.

2. The energy storage device according to claim 1, characterized in that: The box body of the first battery includes a first side wall and a second side wall, the first side wall is arranged facing the support member, and the second side wall is arranged facing the second battery, the avoidance structure is connected between the first side wall and the second side wall, and the side of the avoidance structure facing away from the battery cell is formed with an avoidance space for avoiding the supporting part of the second supporting member.

3. The energy storage device according to claim 2, characterized in that: At least a portion of the supporting portion of the second supporting member is located in the avoidance space.

4. The energy storage device according to claim 2 or 3, characterized in that: The distance between the side surface of the supporting portion of the second supporting member facing away from the supporting member and the supporting member is L1, and the distance between the second side wall and the supporting member is L2, wherein L1≤L2.

5. The energy storage device according to any one of claims 2 to 4, characterized in that: The distance between the second side wall and the second battery is L3, and the size of the supporting portion of the second supporting member in the first direction is L4, wherein L3<L4.

6. The energy storage device according to any one of claims 2 to 5, characterized in that: The avoidance structure includes an inclined section connected between the first side wall and the second side wall, and the inclined section extends obliquely from an end portion of the inclined section for connecting with the first side wall toward the second side wall and toward the inside of the box.

7. The energy storage device according to claim 6, characterized in that: The avoidance structure further includes a first arc segment, wherein the first arc segment is connected between the first side wall and the inclined segment; And / or, the avoidance structure further includes a second arc segment, wherein the second arc segment is connected between the second side wall and the inclined segment.

8. The energy storage device according to any one of claims 2 to 5, characterized in that: The avoidance structure is recessed toward the box body to form an avoidance gap, and the avoidance gap forms the avoidance space.

9. The energy storage device according to claim 8, characterized in that: The avoidance structure includes a bending section, the bending section is connected between the first side wall and the second side wall, and the bending section is surrounded to form the avoidance gap.

10. The energy storage device according to claim 9, characterized in that: The bending section includes a first straight line sub-segment and a second straight line sub-segment intersecting each other, wherein the first straight line sub-segment is connected between the first side wall and the second straight line sub-segment, and the second straight line sub-segment is connected between the first straight line sub-segment and the second side wall.

11. The energy storage device according to claim 10, characterized in that: The first straight line sub-segment is perpendicular to the second straight line sub-segment.

12. The energy storage device according to claim 10 or 11, characterized in that: The bending segment further includes an arcuate sub-segment, and the arcuate sub-segment is connected between the first straight line sub-segment and the second straight line sub-segment.

13. The energy storage device according to any one of claims 10 to 12, characterized in that: The first straight line sub-segment is perpendicular to the first side wall, and / or the second straight line sub-segment is perpendicular to the second side wall.

14. The energy storage device according to any one of claims 1 to 13, characterized in that: The battery cell in the first battery has a first end face facing the second battery, the first end face is provided with an electrode terminal, and the orthographic projection of the avoidance structure on the first end face is staggered with the orthographic projection of the portion of the electrode terminal protruding from the first end face on the first end face.

15. The energy storage device according to any one of claims 1 to 14, characterized in that: Each of the supporting members further includes a connecting portion, and the supporting portion is connected to the connecting portion at a side portion in the first direction.

16. The energy storage device according to claim 15, characterized in that: The connecting portion and the battery supported on the supporting portion are located on the same side of the supporting portion.

17. The energy storage device according to any one of claims 1 to 16, characterized in that: There are multiple support members, and the multiple support members are arranged at intervals along the second direction. The battery pack is provided between two adjacent support members, and the supporting members are provided on the sides opposite to each other of two adjacent support members; the avoidance structure is provided on the opposite sides of the box body of the first battery along the second direction, and the second direction is perpendicular to the first direction.

18. The energy storage device according to claim 17, characterized in that: The support member includes a first support portion and a second support portion, the first support portion and the second support portion are arranged along a third direction, the opposite ends of the supporting member along the third direction are respectively connected to the first support portion and the second support portion, and the third direction is perpendicular to the first direction and the second direction.

19. A battery, characterized in that: include: Battery cells; Box; The battery cell is located in the box body, the box body includes a first side wall, a second side wall and a third side wall, the second side wall and the third side wall are arranged at intervals along a first direction, the battery cell is located between the second side wall and the third side wall, the first side wall is located between the second side wall and the third side wall, an avoidance structure is connected between the first side wall and the second side wall, and an avoidance space is formed on the side of the avoidance structure facing away from the box body.

20. The battery according to claim 19, characterized in that: The avoidance structure includes an inclined section connected between the first side wall and the second side wall, and the inclined section extends obliquely from an end portion of the inclined section for connecting with the first side wall toward the second side wall and toward the inside of the box.

21. The battery according to claim 20, characterized in that: The avoidance structure further includes a first arc segment, wherein the first arc segment is connected between the first side wall and the inclined segment; And / or, the avoidance structure further includes a second arc segment, wherein the second arc segment is connected between the second side wall and the inclined segment.

22. The battery according to claim 19, characterized in that: The avoidance structure is recessed toward the box body to form an avoidance gap, and the avoidance gap forms the avoidance space.

23. The battery according to claim 22, characterized in that: The avoidance structure includes a bending section, the bending section is connected between the first side wall and the second side wall, and the bending section is surrounded to form the avoidance gap.

24. The battery according to claim 23, characterized in that: The bending section includes a first straight line sub-segment and a second straight line sub-segment intersecting each other, wherein the first straight line sub-segment is connected between the first side wall and the second straight line sub-segment, and the second straight line sub-segment is connected between the first straight line sub-segment and the second side wall.

25. The battery according to claim 24, characterized in that: The first straight line sub-segment is perpendicular to the second straight line sub-segment.

26. The battery according to claim 24 or 25, characterized in that: The bending segment further includes an arcuate sub-segment, and the arcuate sub-segment is connected between the first straight line sub-segment and the second straight line sub-segment.

27. The battery according to any one of claims 24 to 26, characterized in that: The first straight line sub-segment is perpendicular to the first side wall, and / or the second straight line sub-segment is perpendicular to the second side wall.

28. The battery according to any one of claims 19 to 27, characterized in that: The battery cell has a first end surface facing the second side wall, an electrode terminal is provided on the first end surface, and an orthographic projection of the avoidance structure on the first end surface is staggered with an orthographic projection of a portion of the electrode terminal protruding from the first end surface on the first end surface.

29. The battery according to any one of claims 19 to 28, characterized in that: The avoidance structure is connected to two opposite sides of the second side wall along a second direction, and the second direction is perpendicular to the first direction.

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