Energy storage device and energy storage system

Abstract

The present application discloses an energy storage device and an energy storage system. The energy storage device comprises a housing, a clamping member, a battery, and adjustment members; the clamping member is arranged in the housing, and the clamping member comprises a first clamping part and a second clamping part; the first clamping part and the second clamping part are connected, and a clamping space is formed between the first clamping part and the second clamping part; the battery is located in the clamping space; the adjustment members are located in the housing; the first clamping part and the second clamping part are connected by means of the adjustment members; and the adjustment members are used for adjusting the size of the clamping space, so as to adjust the degree of clamping of the battery by the first clamping part and the second clamping part.

Description

Energy storage devices and energy storage systems

[0001] Related cross-references

[0002] This application claims the Chinese patent application filed on January 26, 2024, with application number "2024101184720" and the public name "Energy Storage Device and Energy Storage System", the Chinese patent application filed on September 20, 2024, with application number "2024113199996" and the public name "Energy Storage Device and Energy Storage System", and the Chinese patent application filed on November 20, 2024, with application number "202411672949" and the public name "Energy Storage Device and Energy Storage System". 6”, with the public name “Energy Storage Device and Energy Storage System”, the Chinese patent application with application number “2024231771870” filed with the Chinese Patent Office on December 20, 2024, with the public name “Shell Assembly, Energy Storage Device and Energy Storage System”, and the Chinese patent application with application number “2024231771264”, with the public name “Mobile Energy Storage Device, Shell Assembly and Energy Storage System”, all of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of energy storage technology, and in particular to an energy storage device and an energy storage system. Background Art

[0004] In related technologies, energy storage devices typically include multiple single cells connected in series. Since single cells expand during the charge and discharge process, they can squeeze other cells within the energy storage device, damaging the device's basic framework and shortening its service life, even causing safety incidents. Furthermore, they can cause the performance of the single cells themselves to degrade, increasing safety risks and reducing the performance of the energy storage device. Summary of the Invention

[0005] The embodiments of the present application disclose an energy storage device and an energy storage system, which can effectively prevent battery expansion, thereby avoiding various battery performance and safety issues caused by battery expansion.

[0006] In order to achieve the above objectives, the present application discloses, in a first aspect, an energy storage device, comprising:

[0007] shell;

[0008] a clamping member disposed in the housing and comprising a first clamping component and a second clamping component, wherein the first clamping component and the second clamping component are connected, and a clamping space is formed between the first clamping component and the second clamping component;

[0009] a battery, the battery being built into the clamping space; and

[0010] An adjusting member is located in the housing, the first clamping member and the second clamping member are connected through the adjusting member, and the adjusting member is used to adjust the size of the clamping space to adjust the degree of clamping of the battery by the first clamping member and the second clamping member.

[0011] A second aspect of the present application discloses an energy storage system, which includes the energy storage device as described in the first aspect above.

[0012] Compared with the prior art, this application has the following beneficial effects:

[0013] The energy storage device and energy storage system provided in the present application add a clamping member including a first clamping member and a second clamping member, and use an adjusting member to connect the first clamping member and the second clamping member so that the size of the clamping space for placing the battery formed by the first clamping member and the second clamping member can be changed. In this way, not only can the first clamping member and the second clamping member be used to clamp the battery, but the size of the battery can also be adapted to adjust the degree of clamping of the battery by the first clamping member and the second clamping member, so as to adjust the clamping force applied to the battery by the first clamping member and the second clamping member, thereby slowing down the expansion of the battery or even preventing the battery from expanding, thereby ensuring the performance of the battery, improving its service life, and reducing safety hazards.

[0014] In addition, since the size of the clamping space in the present application is adjustable and can be adapted to the size of the battery, the first clamping component and the second clamping component can clamp batteries of different sizes. There is no need to prepare multiple clamping parts with different clamping space sizes to adapt to the size of the battery, which is beneficial to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] FIG1 is a schematic structural diagram of an energy storage device disclosed in an embodiment of the present application;

[0017] FIG2 is a schematic diagram of the exploded structure of the energy storage device disclosed in an embodiment of the present application;

[0018] FIG3 is a schematic diagram of a first structure of a clamping member disclosed in an embodiment of the present application;

[0019] FIG4 is a schematic diagram of the exploded structure of the clamping member in FIG3 ;

[0020] FIG5 is a schematic diagram of a first structure of a second clamping component disclosed in an embodiment of the present application;

[0021] FIG6 is a schematic structural diagram of a clamping member and a battery disclosed in an embodiment of the present application;

[0022] FIG7 is a schematic diagram of a second structure of the clamping member disclosed in an embodiment of the present application;

[0023] FIG8 is a schematic diagram of the exploded structure of the clamping member in FIG7;

[0024] FIG9 is a schematic diagram of a second structure of the second clamping member disclosed in an embodiment of the present application;

[0025] FIG10 is a schematic structural diagram of a first clamping component disclosed in an embodiment of the present application;

[0026] FIG11 is a schematic structural diagram of the bottom shell disclosed in an embodiment of the present application;

[0027] FIG12 is a schematic structural diagram of a battery, a clamping member, a mainboard mounting member, and a circuit mainboard disclosed in an embodiment of the present application;

[0028] FIG13 is a schematic diagram of the exploded structure of FIG12;

[0029] FIG14 is a schematic structural diagram of a circuit mainboard disclosed in an embodiment of the present application;

[0030] FIG15 is a schematic structural diagram of a mainboard mounting member disclosed in an embodiment of the present application;

[0031] FIG16 is a schematic structural diagram of a mainboard mounting member disclosed in an embodiment of the present application from another perspective;

[0032] FIG17 is a cross-sectional view of the energy storage device disclosed in an embodiment of the present application along the line MM in FIG1 ;

[0033] FIG18 is a structural diagram of the bottom shell disclosed in an embodiment of the present application from another perspective;

[0034] FIG19 is a schematic diagram of the three-dimensional structure of the housing assembly disclosed in an embodiment of the present application;

[0035] FIG20 is a cross-sectional view of the housing assembly disclosed in an embodiment of the present application along the NN direction in FIG19 ;

[0036] FIG21 is a schematic structural diagram of a gripping member disclosed in an embodiment of the present application;

[0037] FIG22 is a side view of a housing assembly disclosed in an embodiment of the present application;

[0038] FIG23 is a schematic diagram of the three-dimensional structure of the housing assembly disclosed in an embodiment of the present application from another perspective;

[0039] FIG24 is a schematic diagram of the three-dimensional structure of the housing assembly disclosed in an embodiment of the present application from another perspective;

[0040] FIG25 is a schematic diagram of the three-dimensional structure of the energy storage device disclosed in an embodiment of the present application without showing the bottom shell;

[0041] FIG26 is a schematic diagram of a first structure of the housing assembly disclosed in an embodiment of the present application along the AA direction in FIG24 ;

[0042] FIG27 is a schematic diagram of a second structure of the housing assembly disclosed in an embodiment of the present application along the AA direction in FIG24 ;

[0043] FIG28 is a schematic diagram of a third structure of the housing assembly disclosed in an embodiment of the present application along the AA direction in FIG24 ;

[0044] FIG29 is a fourth structural diagram of the housing assembly disclosed in an embodiment of the present application along the AA direction in FIG24 ;

[0045] FIG30 is a schematic diagram of a fifth structure of the housing assembly disclosed in an embodiment of the present application along the AA direction in FIG24 ;

[0046] FIG31 is a schematic structural diagram of the intermediate housing and the sealing member disclosed in an embodiment of the present application;

[0047] FIG32 is a schematic structural diagram of the intermediate housing disclosed in an embodiment of the present application;

[0048] FIG33 is a schematic structural diagram of the intermediate housing disclosed in an embodiment of the present application from another perspective;

[0049] FIG34 is a structural diagram of the bottom shell disclosed in an embodiment of the present application from another perspective;

[0050] Figure 35 is a schematic structural diagram of the top shell disclosed in an embodiment of the present application.

[0051] Explanation of main reference numerals 100 - energy storage device; 100a - housing assembly; 1 - housing; 1a - first gap; 1b - second gap; 1c - third gap; 11 - top shell; 111 - second vent; 111a - waterproof breathable membrane; 112 - first groove; 1121 - groove wall; 113 - annular protrusion; 114 - power plug; 115 - second functional device; 116 - foolproof protrusion; 117 - through hole; 12 - intermediate shell; 121 - stop protrusion; 1211 - first stop surface; 1211a - second groove; 1212 - second stop surface; 122 - second step structure; 1221 - first step surface; 1222 - second step surface; 1223 - clamping protrusion; 123 - plug-in block; 123a - first plug-in block; 123b - second plug-in block; 123b1 - first plug-in board; 1 23b2 - second plug-in board; 124 - foolproof slot; 125 - vent hole; 126 - mounting slot; 127 - avoidance slot; 128 - second mounting hole; 129 - fourth mounting hole; 129a - second reinforcing rib; 13 - bottom shell; 13a - first side wall; 13b - second side wall; 131 - first side rib; 1311 - first guide surface; 132 - stop plate; 133 - second side rib; 1331 - second guide surface; 134 - bottom rib; 135 - partition; 1351 - first side surface; 1352 - inclined surface; 136 - limiting protrusion; 137 - bump; 1371 - plug-in slot; 2-Clamping member; 21-First clamping component; 211-First clamping body; 2111-Connecting surface; 212-First flange; 2121-First connecting hole; 2122-First avoidance hole; 2122a-Hole wall; 213-Boss; 2131-First threaded connecting hole; 214-Ribbon; 215-Second bending component; 216-First mounting flange; 2161-First mounting hole; 22-Second clamping component; 221-Second clamping body; 222-Second flange; 2221-Threaded hole; 2222-Second connecting hole; 2223-Second avoidance hole; 223-Second mounting flange; 2231-Third mounting hole; 23-Clamping space; 24-First reinforcing rib; 25-Second reinforcing rib; 26-First protrusion; 3-battery; 31-explosion-proof valve; 4-adjusting member; 41-first through-slot; 42-first bending member; 42a-bending portion; 43-threaded member; 43a-screw; 43b-head; 43c-slot; 44-nut; 5-binding strap; 6-mainboard mounting member; 61-sleeve structure; 611-first reinforcing rib; 62-second through-hole; 63a-card slot; 63b-fourth connecting hole; 64-first step structure; 65-wiring trough; 651-partitioning protrusion; 652-sub-wiring trough; 66-first vent; 67-heat dissipation hole; 67a-first sub-heat dissipation hole; 67b-second sub-heat dissipation hole; 67c-third sub-heat dissipation hole; 7-circuit board; 71a-first through-hole; 71b-third connecting hole;72 - Fan; 73 - Electronic component; 731 - First functional device; 74 - First conductive protrusion; 75 - Second conductive protrusion; 7a - Heat dissipation fin; 8 - Thermal insulation; 81 - Second through-slot; 9 - Grip; 91 - Side surface; 92 - First rib; 93 - Second rib; 94 - Mounting post; 941 - Second threaded connection hole; 9a - Seal; 9b - Electrical connector. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0054] It will be understood that the terms "first," "second," and the like as used herein may be used herein to describe various elements, but these elements are not limited by these terms. These terms are used solely to distinguish a first element from another element. For example, a first clamping member may be referred to as a second clamping member, and similarly, a second clamping member may be referred to as a first clamping member, without departing from the scope of this application. The first clamping member and the second clamping member are both clamping members, but they are not the same clamping member.

[0055] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0056] As used herein, the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the relevant listed items.

[0057] Energy storage devices in related technologies typically include multiple batteries connected in series. This increases the cost of the device. Furthermore, in related technologies, multiple batteries are often simply bundled together using cable ties to facilitate assembly into a housing. However, as batteries expand during charging and discharging, they can squeeze other batteries within the device, damaging the device's base frame and impacting its service life, potentially leading to safety incidents. Furthermore, this can cause degradation in the battery's performance, increasing safety risks and reducing the device's performance.

[0058] In view of this, an embodiment of the present application provides an energy storage device that can effectively prevent the battery from expanding. In the energy storage device, when the battery is charging and discharging, the first clamping part and the second clamping part can be used to clamp the battery to slow down the expansion of the battery or even prevent the battery from expanding, thereby ensuring the battery performance of the battery; on this basis, the present application also uses an adjusting part to realize the connection between the first clamping part and the second clamping part, so that the size of the clamping space can be adjusted by the adjusting part to adjust the clamping degree of the battery by the first clamping part and the second clamping part, so that the clamping force applied to the battery by the first clamping part and the second clamping part can be adjusted to slow down the expansion of the battery or even prevent the battery from expanding, thereby ensuring the battery performance, improving the service life and reducing safety hazards.

[0059] Example 1

[0060] Referring to Figures 1 to 3, the first embodiment of the present application discloses an energy storage device, which includes a housing 1, a clamping member 2, a battery 3, and an adjusting member 4. The clamping member 2 is disposed in the housing 1, and the clamping member 2 includes a first clamping part 21 and a second clamping part 22, wherein the first clamping part 21 and the second clamping part 22 are connected, and a clamping space 23 is formed between the first clamping part 21 and the second clamping part 22, the battery 3 is built into the clamping space 23, the adjusting member 4 is located in the housing 1, the first clamping part 21 and the second clamping part 22 are connected, and the first clamping part 21 and the second clamping part 22 are connected. The clamping member 22 is connected via the adjusting member 4 so that the adjusting member 4 can be used to adjust the size of the clamping space 23 to adjust the degree of clamping of the battery 3 by the first clamping member 21 and the second clamping member 22. This can avoid the situation where the clamping space 23 is too large to compress the battery 3, and ensure that the battery 3 can be pressed by the first clamping member 21 and / or the second clamping member 22 during charging and discharging, so as to slow down the expansion of the battery 3 or even prevent the battery 3 from expanding, thereby ensuring the performance of the battery 3, improving its service life and reducing safety hazards.

[0061] It is understandable that, since processing errors are inevitable, even batteries 3 of the same model may have different sizes. Batteries 3 of different sizes require clamping spaces 23 of different sizes to adapt to the size of the battery 3 in order to achieve the effect of clamping the battery 3. To this end, the present application connects the first clamping component 21 and the second clamping component 22 through an adjusting member 4, so that the size of the clamping space 23 can be adjusted with the help of the adjusting member 4 to adapt to the size of the battery 3, clamp the battery 3, and prevent the battery 3 from expanding, thereby ensuring that the battery 3 has excellent performance, improving the service life of the battery 3, and reducing safety hazards. In addition, precisely because the size of the clamping space 23 in the present application is adjustable and can adapt to the size of the battery 3, the first clamping component 21 and the second clamping component 22 can clamp batteries 3 of different sizes, without the need to prepare multiple clamping components 2 with different sizes of clamping spaces 23 to adapt to the size of the battery 3, which is conducive to reducing costs.

[0062] Preferably, the battery 3 in the present application is one, and the energy of the energy storage device 100 in the present application can be 1KWH (1 kWh), 2KWH (2 kWh), 3KWH (3 kWh), 4KWH (4 kWh), 5KWH (5 kWh), etc., that is, the battery 3 in the present application can be a large-capacity battery, so that a single battery 3 can constitute an energy storage device 100, realize independent charging and discharging, and reduce the space occupied by the energy storage device 100, so that the energy storage device 100 in the present application can be adapted to more application scenarios, such as household energy storage, mobile power supply, etc. Compared with the energy storage device 100 using multiple batteries 3, the cost is lower, so that families in energy-poor areas can afford and use it, and people in energy-poor areas around the world can also obtain affordable, reliable and sustainable sources of electricity, so as to help improve electricity consumption in production and life in energy-poor areas. Among them, "KWH" stands for kilowatt-hour.

[0063] For example, when the energy storage device 100 in the present application is an energy storage device with an energy capacity of 1 kilowatt-hour (kWh), for energy-poor families, the energy storage device 100 of the present application with one kWh can provide 80 hours of lighting or 16 hours of electric fan use, etc.; or, the energy storage device 100 of the present application with one kWh can also promote small family businesses, such as supporting 80 hours of irrigation or 10 hours of sewing machine use, etc., so that people in energy-poor areas can continuously increase their family income and improve their lives; or, in terms of public health, the energy storage device 100 of the present application with one kWh can also support small medical equipment, such as small medical refrigerators, etc., which can be used to store vaccines and medicines and improve medical conditions.

[0064] It is precisely because the battery 3 in this application is a large-capacity battery, whose expansion force is usually greater than the expansion force of multiple small-capacity batteries in the related technology, so this application uses the first clamping part 21 and the second clamping part 22 to clamp the battery 3, and the first clamping part 21 and the second clamping part 22 can also use the adjustment part 4 to adjust the degree of compression of the battery 3 to avoid the situation where the degree of compression of the battery 3 is too loose, resulting in the battery 3 still producing a large expansion, thereby affecting the battery performance, thereby ensuring the performance of the battery 3, improving the service life and reducing safety hazards.

[0065] On this basis, in order to meet the requirement of large expansion force, the present application also limits the material of the first clamping part 21 and the second clamping part 22 to metal, such as stainless steel, iron, aluminum, aluminum alloy, copper, copper alloy, etc. The material of the first clamping part 21 and the second clamping part 22 is metal. Compared with the first clamping part 21 and the second clamping part 22 being plastic parts, the hardness of the first clamping part 21 and the second clamping part 22 can reach the range of 150HB-220HB. The first clamping part 21 and the second clamping part 22 have a strong ability to resist deformation and have a better compression effect on the battery 3, so as to prevent the battery 3 from expanding, ensure the battery 3 has excellent performance, improve the service life of the battery 3 and reduce safety hazards. Among them, "HB" represents Brinell hardness.

[0066] In the present application, as shown in Figures 3 and 4, the first clamping component 21 may include a first clamping body 211 and a first flange 212 connected to the first clamping body 211, and the second clamping component 22 may include a second clamping body 221 and a second flange 222 connected to the second clamping body 221. The first flange 212 and the second flange 222 are connected by an adjusting member 4 to achieve the connection between the first clamping body 211 and the second clamping body 221, wherein the aforementioned clamping space 23 is formed between the first clamping body 211 and the second clamping body 221, and the first flange 212 and the second flange 222 are both located outside the clamping space 23. The above-mentioned structure can facilitate the first flange 212 and the second flange 222 to provide a setting position for the adjusting member 4, so that the first clamping component 21 and the second clamping component 22 can be connected through the adjusting member 4.

[0067] As an optional embodiment, the adjusting member 4 may include a first through-slot 41 and a first bent member 42, wherein the first through-slot 41 is provided in the first flange 212, and the first bent member 42 is provided in the second flange 222, and the first bent member 42 is passed through the first through-slot 41. The first bent member 42 has a bent portion 42a, which protrudes from the surface of the first flange 212 facing away from the second flange 222, and the length of the bent portion 42a protruding relative to the first flange 212 is variable. The bent portion 42a can be bent until it abuts against the first flange 212, thereby achieving a connection between the first flange 212 and the second flange 222.

[0068] As will be appreciated, when the first clamping member 21 and the second clamping member 22 are assembled, when the first flange 212 and the second flange 222 abut against each other, the clamping space 23 is minimized, and the protrusion of the bent portion 42a relative to the first flange 212 is at its longest. Therefore, to ensure that the first clamping member 21 and the second clamping member 22 can clamp the battery 3, the size of the battery 3 is generally slightly larger than the minimum clamping space 23. When the size of the battery 3 is larger than the minimum clamping space 23, a gap is created between the first flange 212 and the second flange 222 to increase the clamping space 23. The protrusion of the bent portion 42a relative to the first flange 212 is shortened, and the first bent member 42 can compensate for the gap between the first flange 212 and the second flange 222. This ensures that the first clamping member 21 and the second clamping member 22 always remain in close contact with the battery 3, compressing the battery 3 and preventing expansion. This, in turn, ensures the performance of the battery 3, extends its service life, and reduces safety hazards. The adjusting member 4 adopts the above-mentioned structure, which is relatively simple and easy to implement, thereby helping to reduce costs.

[0069] As another optional embodiment, the adjusting member 4 may be a threaded member, so that the adjusting member 4 can be used to change the distance between the first flange 212 and the second flange 222 when rotated, that is, the distance between the first flange 212 and the second flange 222 can be changed by rotating the adjusting member 4, thereby changing the size of the clamping space 23 to adapt to the size of the battery 3, clamp the battery 3, and prevent the battery 3 from expanding, so as to ensure that the battery 3 has excellent performance, improve the service life of the battery 3 and reduce safety hazards.

[0070] For example, when the size of the battery 3 is larger than the minimum clamping space 23, a gap will exist between the first flange 212 and the second flange 222 to increase the clamping space 23. In this case, the threaded member can fill the gap between the first flange 212 and the second flange 222, so that the first clamping member 21 and the second clamping member 22 can always be in close contact with the battery 3, pressing the battery 3 and preventing the battery 3 from expanding. This can ensure the performance of the battery 3, increase its service life, and reduce safety hazards. The adjusting member 4 adopts the above structure, which is relatively simple and easy to implement, which helps to reduce costs.

[0071] As another optional embodiment, there are multiple adjusting members 4, and the multiple adjusting members 4 include a first adjusting member and a second adjusting member. The first adjusting member includes a first through groove 41 and a first bending part 42, and the second adjusting member is a threaded member. In this way, the first flange 212 and the second flange 222 can be connected by the cooperation of the first through groove 41 and the first bending part 42, and can also be connected by a threaded connection.

[0072] In the present application, a plurality of adjusting members 4 are adopted, and the adjusting members 4 include a plurality of first adjusting members and a plurality of second adjusting members. The plurality of first adjusting members and the plurality of second adjusting members are alternately arranged, so as to improve the connection reliability between the first clamping part 21 and the second clamping part 22, and enhance the clamping effect of the first clamping part 21 and the second clamping part 22 on the battery 3.

[0073] In some embodiments, as shown in FIG4 , when the adjusting member 4 is a threaded member, as a first optional embodiment, the first flange 212 is provided with a first connecting hole 2121, and the second flange 222 is provided with a threaded hole 2221 corresponding to the first connecting hole 2121. The adjusting member 4 includes a screw 43a and a head 43b having a diameter larger than that of the screw 43a. The screw 43a is passed through the first connecting hole 2121 and the threaded hole 2221, and one end of the screw 43a is threadedly connected to the threaded hole 2221 on the second flange 222. The head 43b is connected to the other end of the screw 43a and abuts against the surface of the first flange 212 facing away from the second flange 222. Alternatively, the adjusting member 4 may be a bolt or a screw.

[0074] In this embodiment, a tool such as a flat-blade screwdriver, a Phillips screwdriver, or a Pozidriv screwdriver can be inserted into the slot 43c of the head 43b, and the screw 43a can be screwed with the help of the above tool to adjust the distance between the first flange 212 and the second flange 222 to adapt to the size of the battery 3, so that the first clamping part 21 and the second clamping part 22 can always be tightly attached to the battery 3, pressing the battery 3 to prevent the battery 3 from expanding, thereby ensuring the performance of the battery 3, improving its service life, and reducing safety hazards.

[0075] Furthermore, in some embodiments, the adjusting member 4 may also include a nut 44, which is threadedly sleeved on the outer periphery of the other end of the screw 43a, and the nut 44 abuts against the surface of the second flange 222 facing away from the first flange 212, thereby further improving the connection reliability between the first clamping part 21 and the second clamping part 22, and enhancing the clamping effect of the first clamping part 21 and the second clamping part 22 on the battery 3.

[0076] As a second optional embodiment, the first flange 212 is provided with a first connection hole 2121, and the second flange 222 is provided with a second connection hole 2222 corresponding to the first connection hole 2121. The adjusting member 4 includes a threaded component 43 and a nut 44. The threaded component 43 includes a screw 43a and a head 43b having a diameter larger than that of the screw 43a. The screw 43a is inserted into the first connection hole 2121 and the second connection hole 2222. The head 43b is connected to one end of the screw 43a and abuts against the surface of the first flange 212 facing away from the second flange 222. The nut 44 is threadedly sleeved on the outer periphery of the other end of the screw 43a and abuts against the surface of the second flange 222 facing away from the first flange 212. Optionally, the threaded component 43 can be a bolt or a screw.

[0077] In this embodiment, a tool such as a flat-blade screwdriver, a Phillips screwdriver, or a Pozidriv screwdriver can also be inserted into the slot 43c of the head 43b, and the screw 43a can be screwed with the help of the above tool to adjust the distance between the first flange 212 and the second flange 222 to adapt to the size of the battery 3, so that the first clamping part 21 and the second clamping part 22 can always be tightly attached to the battery 3, pressing the battery 3 to prevent the battery 3 from expanding, thereby ensuring the performance of the battery 3, improving its service life, and reducing safety hazards.

[0078] Since the energy storage device 100 in this application uses a single battery 3, which is relatively small and has a relatively low cost, the thickness of the first clamping member 21 and the second clamping member 22 are usually designed to be relatively thin to adapt to the small size and low cost of the energy storage device 100. Therefore, the depth of the threaded hole 2221 on the second flange 222 is also relatively small. In this way, the depth of the threaded hole on the nut 44 is usually greater than the depth of the threaded hole 2221 on the second flange 222. Therefore, the distance between the screw 43a and the nut 44 is larger. The threaded connection between the first and second flanges 212 and 222 is more stable than the threaded connection between the screw 43a and the threaded hole 2221 on the second flange 222. Therefore, the first flange 212 and the second flange 222 are connected by the cooperation of the screw 43a and the nut 44. Compared with the connection achieved by the cooperation of the screw 43a and the threaded hole 2221 on the second flange 222, the connection reliability between the first clamping part 21 and the second clamping part 22 is better, thereby improving the clamping effect of the first clamping part 21 and the second clamping part 22 on the battery 3.

[0079] It can be understood that in other embodiments, when the adjusting member 4 is a threaded member and there are multiple adjusting members 4, some adjusting members 4 may be a structure including a screw 43a and a head 43b, and another part of the adjusting member 4 may be a structure including a threaded member 43 and a nut 44.

[0080] In some embodiments, as shown in Figures 4 and 5, the first clamping component 21 also includes a first reinforcing rib 24, which is respectively connected to the first flange 212 and the first clamping body 211; and / or, the second clamping component 22 also includes a second reinforcing rib 25, which is respectively connected to the second flange 222 and the second clamping body 221.

[0081] Reinforcing ribs are provided at the connection between the clamping body (i.e., the first clamping body 211 and the second clamping body 221) and the flange (i.e., the first flange 212 and the second flange 222) to improve the structural strength of the first clamping part 21 and the second clamping part 22, so that the clamping part 2 can better cope with the large expansion force of the battery 3.

[0082] In some embodiments, the first clamping component 21 and the second clamping component 22 can be fixed in the housing 1 by screws or bolts, so as to facilitate the installation and fixation of the clamping member 2 in the housing 1 .

[0083] In some embodiments, as shown in Figures 6 to 8, the energy storage device also includes a strap 5, which is sleeved on the periphery of the first clamping part 21 and the second clamping part 22 to further fix and clamp the first clamping part 21 and the second clamping part 22, thereby further improving the clamping effect of the first clamping part 21 and the second clamping part 22 on the battery 3, and thus enabling the clamping part 2 to better cope with the large expansion force of the battery 3.

[0084] When the clamping parts (i.e., the first clamping part 21 and the second clamping part 22) include flanges (i.e., the first flange 212 and the second flange 222), the flanges are provided with avoidance holes for the strap 5 to pass through, thereby avoiding interference between the strap 5 and the flanges; or, the flanges are located on one side of the strap 5, and at this time the strap 5 does not pass through the flanges, but is staggered with the flanges, thereby avoiding interference between the strap 5 and the flanges.

[0085] For example, as shown in Figures 6 to 10, the first flange 212 is further provided with a first avoidance hole 2122, and the second flange 222 is further provided with a second avoidance hole 2223. The projection of the circumferential edge of the second avoidance hole 2223 on the first flange 212 coincides with the circumferential edge of the first avoidance hole. The strap 5 is sleeved on the periphery of the first clamping body 211 and the second clamping body 221, and the strap 5 is passed through the first avoidance hole 2122 and the second avoidance hole 2223. The first clamping body 211 has a connecting surface 2111 for connecting with the first flange 212, and the first avoidance hole 2223 is provided. 2122 has a hole wall surface 2122a that is coplanar with the connecting surface, so that when the strap 5 is passed through the first avoidance hole 2122 and the second avoidance hole 2223, the strap 5 can respectively abut against the connecting surface 2111 and the hole wall surface 2122a. Compared with the manner in which the hole wall surface 2122a and the connecting surface 2111 are not coplanar (for example, the hole wall surface 2122a is higher than the connecting surface 2111), there will be no gap between the strap 5 and the clamping body, which can ensure the tightness of the fit between the strap 5 and the clamping body and improve the tightening effect of the strap 5 on the first clamping part 21 and the second clamping part 22.

[0086] When the present application adopts the method of opening an avoidance hole in the flange to avoid the strap 5, and the adjusting member 4 includes a first through groove 41 and a first bending part 42, the first avoidance hole 2122 and the first through groove 41 at least partially overlap in the projection of the first clamping body 211, that is, in the protruding direction of the first flange 212 relative to the first clamping body 211, the first avoidance hole 2122 is at least partially arranged corresponding to the first through groove 41, and the second flange 222 is also provided with a second avoidance hole 2223, and the projection of the circumferential edge of the second avoidance hole 2223 on the first flange 212 overlaps with the circumferential edge of the first avoidance hole 2122; the strap 5 is sleeved on the periphery of the first clamping body 211 and the second clamping body 221, and the strap 5 is passed through the first avoidance hole 2122 and the second avoidance hole 2223.

[0087] It is understandable that when the battery 3 expands, the connection between the first clamping part 21 and the second clamping part 22 is generally the most likely to collapse (that is, the first bent part 42 is likely to break away from the first through groove 41). Through the above design, the projections of the first avoidance hole 2122 and the first through groove 41 on the first clamping body 211 can at least partially overlap. Since the strap 5 is passed through the first avoidance hole 2122, the projection of the first bent part 42 on the first clamping body 211 can at least partially overlap with the projection of the strap 5 on the first clamping body 211. That is, The protruding direction of the edge 212 relative to the first clamping body 211 can prevent the first bending part 42 and the strap 5 from being completely staggered, so that the position where the strap 5 acts on the clamping part 2 and the position where the first bending part 42 acts on the clamping part 2 can be roughly close to each other, which not only improves the clamping effect of the first clamping part 21 and the second clamping part 22; at the same time, the strap 5 can also be used to provide further fastening for the position where the first clamping part 21 and the second clamping part 22 are most likely to collapse, thereby reducing the possibility of the first clamping part 21 and the second clamping part 22 collapsing.

[0088] In some embodiments, a first snap-fit ​​portion (not shown) is provided at one end of the strap 5, and a second snap-fit ​​portion (not shown) is provided at the other end of the strap 5. The second snap-fit ​​portion engages with the first snap-fit ​​portion, so that the two ends of the strap 5 can be fixed by the cooperation of the first snap-fit ​​portion and the second snap-fit ​​portion. One of the first snap-fit ​​portion and the second snap-fit ​​portion can be a snap-fit ​​groove, and the other can be a clip strip. The clip strip is inserted into the snap-fit ​​groove to achieve the snap-fit ​​connection between the first snap-fit ​​portion and the second snap-fit ​​portion, thereby fixing the two ends of the strap 5.

[0089] Exemplarily, the first snap-on portion and / or the second snap-on portion may be multiple, for example, there are multiple first snap-on portions and there may be one second snap-on portion, multiple first snap-on portions are arranged at intervals along the extension direction of the strap 5 (i.e., the circumferential direction of the battery 3), and the second snap-on portion can be plugged into any first snap-on portion; or, there are multiple second snap-on portions and there is one first snap-on portion, multiple second snap-on portions are arranged at intervals along the extension direction of the strap 5, and the first snap-on portion can be plugged into any second snap-on portion; or, there are multiple first snap-on portions and multiple second snap-on portions, multiple first snap-on portions are arranged at intervals along the extension direction of the strap 5, and multiple second snap-on portions are arranged at intervals along the extension direction of the strap 5, and any first snap-on portion can be plugged into any second snap-on portion; by adopting the above-mentioned design method, the size of the clamping ring formed when the two ends of the strap 5 are fixed can be changed, so that the strap 5 can adapt to form clamping parts 2 of different sizes of clamping spaces 23 to clamp batteries 3 of different sizes, which has higher applicability.

[0090] In some embodiments, the outer side surface of the first clamping part 21 and / or the second clamping part 22 is provided with a plurality of first protrusions 26 arranged at intervals. Specifically, the outer side surface of the first clamping body 211 and / or the second clamping body 221 is provided with a plurality of first protrusions 26 arranged at intervals. Any two adjacent first protrusions 26 are respectively located on two opposite sides of the strap 5. In this way, the two adjacent first protrusions 26 can be used to limit the position of the strap 5 to prevent the strap 5 from slipping, so that the strap 5 can better fix and clamp the first clamping part 21 and the second clamping part 22.

[0091] In some embodiments, a second protrusion (not shown) is provided on the inner side surface of the first clamping part 21 and / or the second clamping part 22, specifically, a second protrusion is provided on the inner side surface of the first clamping body 211 and / or the second clamping body 221, and the second protrusion abuts against the battery 3, and the second protrusion can deform when subjected to force to clamp the battery 3, thereby improving the clamping degree of the first clamping part 21 and the second clamping part 22 on the battery 3; at the same time, it can be understood that, assuming that the size of the clamping space has been adjusted, when batteries 3 of different sizes are located in the clamping space, the degree of compression of the battery 3 on the second protrusion will be different. The larger the battery 3, the greater the degree of compression on the second protrusion, and the greater the degree of deformation of the second protrusion, so that the clamping space can be adaptively increased, so the setting of the second protrusion can also adapt to batteries 3 of different sizes.

[0092] For example, the second protrusion can be deformed when subjected to force, so that soft contact can be formed between the battery 3 and the clamping parts (ie, the first clamping part 21 and the second clamping part 22 ), thereby avoiding wear on the battery 3 .

[0093] In some embodiments, as shown in conjunction with Figures 6 to 11 , a first side rib 131 is protruding from the inner sidewall of the housing 1. The first side rib 131 abuts against the first clamping member 21 and / or the second clamping member 22. The first side rib 131 is provided with a first guide surface 1311, such as a guide slope or a guide arc. The first guide surface 1311 is primarily used to guide the clamping member 2 to be installed to a predetermined position within the housing 1, such as the bottom of the housing 1. For example, a mounting opening is provided at one end of the housing 1. The first side rib 131 can extend along the opening of the mounting opening to connect with the inner bottom wall of the housing 1. The first guide surface 1311 is provided on the side of the first side rib 131 facing away from the inner bottom wall of the housing 1. During assembly, the first and second clamping members 21 and 22 can be inserted into the housing 1 through the mounting opening and installed to the bottom of the housing 1 under the guidance of the first guide surface 1311.

[0094] The provision of the first side rib 131 can increase the structural strength of the housing 1, reduce the degree of deformation of the housing 1 when it is subjected to external compression, or prevent the housing 1 from deformation, so as to protect the battery 3 from being squeezed when the housing 1 is subjected to external compression; at the same time, a first guide surface 1311 is provided on the first side rib 131, which can not only prevent the first side rib 131 from blocking or colliding with the first clamping part 21 and the second clamping part 22 when the first clamping part 21 and the second clamping part 22 are inserted into the housing 1 from the installation opening, but also play a guiding role in the installation of the first clamping part 21 and the second clamping part 22.

[0095] In some embodiments, there are multiple first side ribs 131, and the multiple first side ribs 131 are arranged at intervals along the circumference of the shell 1; the inner side wall of the shell 1 includes a first side wall 13a and a second side wall 13b, the first side wall 13a is arranged toward the side of the battery 3, and the second side wall 13b is arranged toward the large surface of the battery 3, and the second side wall 13b is protruded with a stop plate 132, and the stop plate 132 is connected to at least one first side rib 131 arranged on the first side wall 13b. For example, as shown in Figure 11, the stop plate 132 is connected to two first side ribs 131 arranged on the first side wall 13a, and the stop plate 132 is spaced apart from the first side wall of the shell 1, and the stop plate 132 also abuts against the first clamping part 21 and / or the second clamping part 22 to limit the position of the first clamping part 21 and / or the second clamping part 22 in the shell 1, so as to prevent the clamping part 2 from causing the battery 3 to shake or move, thereby avoiding collision with the battery 3 and protecting the battery 3. A stop plate 132 is protruded from the second side wall 13b, and the stop plate 132 is extended to be connected with the first side rib 131, and the stop plate 132 can abut against the first clamping part 21 and / or the second clamping part 22, so that the first side rib 131 abuts against the first clamping part 21 and / or the second clamping part 22 through the stop plate. Compared with the way in which the first side rib 131 directly abuts against the clamping part (the first clamping part 21, the second clamping part 22), the contact area between the first side rib 131 and the clamping part can be increased, thereby improving the limiting effect of the first side rib 131 on the clamping part, and at the same time, it can also prevent the first side rib 131 from causing wear on the clamping part.

[0096] In addition, in the present application, the stop plate 132 is not only connected to the second side wall 13b, but also connected to the first side rib 131 and the inner bottom wall of the shell 1. When the stop plate 132 abuts against the clamping part, the first side rib 131 and the inner bottom wall of the shell 1 can support the stop plate 132, providing supporting force for the stop plate 132, so that the stop plate 132 is not easily squeezed when abutted by the clamping part.

[0097] Furthermore, since the stop plate 132 is spaced apart from the first side wall 13 a of the housing 1 , this helps to reduce the use of materials and the weight of the housing 1 , thereby reducing costs and achieving a lightweight design.

[0098] In some embodiments, as shown in Figures 1, 2 and 12, the energy storage device 100 also includes a mainboard mounting member 6 and a circuit mainboard 7 disposed in the housing 1. The mainboard mounting member 6 is connected to the first clamping member 21, and the mainboard mounting member 6 is located on one side of the battery 3. The circuit mainboard 7 is mounted on the mainboard mounting member 6 and electrically connected to the battery 3. There is a distance between the circuit mainboard 7 and the first clamping member 21, which can provide expansion space for the battery 3 to avoid squeezing the circuit mainboard 7 when the battery 3 expands, thereby protecting the circuit mainboard 7.

[0099] Therefore, in the design of the present application, in order to prevent the battery 3 from squeezing the circuit main board 7 when it expands, not only is a clamping member 2 provided to clamp the battery 3 to reduce the degree of expansion of the battery 3, or to prevent the battery 3 from expanding, thereby preventing the circuit main board 7 from being squeezed when the battery 3 expands; a main board mounting member 6 is further provided to mount the circuit main board 7 on the first clamping member 21 through the main board mounting member 6. The circuit main board 7 is mounted and supported with the help of the main board mounting member 6 so that there can be a distance between the circuit main board 7 and the first clamping member 21 to provide expansion space for the battery 3. This can better prevent the battery 3 from squeezing the circuit main board 7 when it expands, and provide better and more effective protection for the circuit main board 7.

[0100] In the present application, the circuit board 7 can be used as a key component for monitoring, controlling and protecting the battery 3, in which a battery management system (BMS) can be integrated. On the one hand, it can monitor and manage parameters such as the voltage, temperature, charge state and discharge state of the battery 3, thereby avoiding dangerous situations such as overcharging, over-discharging, overcurrent and short circuit, ensuring the safe operation of the battery cell and improving the working life of the battery cell. On the other hand, the energy storage device 100 based on the present application is a battery system composed of a single battery 3. It is a low-voltage design, which can greatly improve the safety factor of the operator and reduce the risk factor of the product in production and maintenance. At the same time, based on the voltage conversion function provided by the internal voltage conversion circuit of the battery management system, the low-voltage battery system output can be adapted to the high voltage of different application scenarios, that is, flexible voltage increase and decrease can be achieved while reducing the difficulty of operation.

[0101] Illustratively, the circuit board 7 is provided with functional circuits with different functions. For example, a bidirectional step-up / step-down circuit (such as a Buck / Boost circuit), a bidirectional isolation circuit (such as an LLC circuit), and an AC / DC conversion circuit (such as a CCM Totem-Pole). It is understood that in actual use, the circuit board 7 can integrate different functional circuits according to the application scenario of the energy storage device 100 to meet application requirements.

[0102] The energy storage device 100 of the present application is a battery system composed of a single battery 3, which is a low-voltage design. Typically, the voltage value of a single battery 3 is relatively low, generally around 3.2V. Therefore, when the energy storage device 100 of the present application is discharged, the 3.2V DC voltage output by the battery 3 will first be boosted to 310V DC by the bidirectional buck-boost circuit on the circuit main board 7, and then inverted to 220V AC by the AC-DC conversion circuit on the circuit main board 7 to meet the charging requirements of the device to be charged, thereby achieving discharge of the energy storage device 100; and when the energy storage device 100 of the present application is charged, the external 220V AC input is first inverted to 310V DC by the AC-DC conversion circuit on the circuit main board 7, and then stepped down to 3.2V DC by the bidirectional buck-boost circuit on the circuit main board 7 to meet the charging requirements of the battery 3, thereby achieving charging of the energy storage device 100.

[0103] In the present application, the motherboard mounting member 6 can be a support column structure or a housing structure with a cavity. If the motherboard mounting member 6 is a support column structure, the motherboard mounting member 6 is protruding from the surface of the first clamping member 21 facing away from the battery 3. The circuit board 7 is positioned on the end surface of the motherboard mounting member 6 facing away from the first clamping member 21, so that there is a gap between the circuit board 7 and the first clamping member 21. If the motherboard mounting member 6 is a housing structure with a cavity, the circuit board 7 is installed in the cavity of the motherboard mounting member 6, so that there is a gap between the circuit board 7 and the first clamping member 21.

[0104] Preferably, the mainboard mounting member 6 is a shell structure with a cavity, which not only allows a distance to be provided between the circuit mainboard 7 and the first clamping member 21 to avoid squeezing the circuit mainboard 7 when the battery 3 expands, but also protects the circuit mainboard 7 from being squeezed when subjected to external squeezing, thereby helping to ensure the performance and service life of the circuit mainboard 7.

[0105] When the motherboard mounting member 6 is a housing structure having a cavity, the present application further wishes to explain that even if the battery 3 expands, causing the first clamping member 21 to deform, because the motherboard mounting member 6 is connected to the first clamping member 21 and the circuit board 7 is mounted on the motherboard mounting member 6, when the battery 3 expands, the motherboard mounting member 6 will move in the direction of the battery's expansion (outward), and the circuit board 7 will move outward along with the motherboard mounting member 6. This allows the circuit board 7 to maintain a certain distance from the motherboard mounting member 6 even when the battery 3 expands, thereby preventing the circuit board 7 from being squeezed even when the battery 3 expands. Furthermore, typically, components are provided on the side of the circuit board 7 facing away from the first clamping member 21, that is, on the side of the circuit board 7 facing the motherboard mounting member 6. Thus, when the battery 3 expands to a certain extent and cannot squeeze the housing 1, shortening the distance between the first clamping member 21 and the circuit board 7, even if squeezed, it is on the side of the circuit board 7 without components, thereby further effectively protecting the components on the circuit board 7.

[0106] Furthermore, as shown in Figures 13 and 14, a boss 213 is protruding from the middle of the first clamping member 21, specifically, the boss 213 is protruding from the middle of the first clamping body 211. The circuit main board 7 is provided with a first through hole 71a, and the boss 213 is passed through the first through hole 71a on the circuit main board 7. During assembly, the circuit main board 7 is usually first mounted to the main board mounting member 6, and then the circuit main board 7 and the main board mounting member 6 are assembled to the first clamping member 21. In this way, when the circuit main board 7 and the main board mounting member 6 are assembled to the first clamping member 21, the boss 213 and the first through hole 71a can cooperate to position the assembly of the circuit main board 7 and the main board mounting member 6, thereby facilitating the assembly between the circuit main board 7 and the main board mounting member 6 and the first clamping member 21.

[0107] Furthermore, the boss 213 can pass through the first through hole 71a and be connected to the inner wall surface of the mainboard mounting member 6, so that the boss 213 can be used to support the middle part of the first clamping part 21, thereby improving the bearing capacity of the mainboard mounting member 6 to avoid the circuit mainboard 7 and the battery 3 from being squeezed when subjected to external pressure, thereby protecting the circuit mainboard 7 and the battery 3.

[0108] Furthermore, as shown in Figures 13 to 15, the motherboard mounting member 6 is provided with a sleeve structure 61 located in the cavity of the motherboard mounting member 6, and the boss 213 on the first clamping part 21 is passed through the hollow portion of the sleeve structure 61 to achieve the connection between the boss 213 and the motherboard mounting member 6, thereby providing connection stability and installation convenience between the boss 213 and the motherboard mounting member 6.

[0109] Illustratively, the outer circumferential surface of the sleeve structure 61 is provided with a plurality of first reinforcing ribs 611. These ribs are arranged in a spaced arrangement along the circumference of the sleeve structure 61 within the cavity of the motherboard mounting member 6, and are each connected to the inner wall surface of the motherboard mounting member 6. The provision of the first reinforcing ribs 611 further enhances the structural strength of the motherboard mounting member 6, improving its load-bearing capacity and preventing the circuit board 7 and battery 3 from being squeezed when subjected to external pressure, thereby protecting the circuit board 7 and battery 3.

[0110] In some embodiments, as shown in Figures 13 to 16, the boss 213 is provided with a first threaded connection hole 2131, and the mainboard mounting member 6 is provided with a second through hole 62 connected to the interior of the sleeve structure 61. Bolts, screws and other fasteners are sequentially passed through the second through hole 62, the hollow portion of the sleeve structure 61 and the first threaded connection hole 2131, and the fastener is threadedly connected to the first threaded connection hole 2131 on the boss 213 to achieve installation and fixation between the mainboard mounting member 6 and the first clamping member 21. The setting of the boss 213 can not only support the mainboard mounting member 6 to improve the bearing capacity of the mainboard mounting member 6, thereby protecting the circuit mainboard 7 and the battery 3 from being squeezed when subjected to external extrusion, but also provide a connection position for installation and fixation between the mainboard mounting member 6 and the first clamping member 21, so as to facilitate the installation and connection between the mainboard mounting member 6 and the first clamping member 21.

[0111] In some embodiments, a card slot 63a is provided on the edge of the motherboard mounting member 6, and a protrusion 214 is provided on the surface of the first clamping member 21 facing the motherboard mounting member 6. Specifically, a protrusion 214 is provided on the surface of the first clamping body 211 facing the motherboard mounting member 6, wherein the protrusion 214 extends in a direction toward the motherboard mounting member 6, and the protrusion 214 is inserted into the card slot 63a. In this way, the insertion effect of the protrusion 214 and the card slot 63a can be utilized to position and limit the installation of the motherboard mounting member 6 and the first clamping member 21, so as to facilitate the installation of the motherboard mounting member 6 between the first clamping member 21, thereby helping to improve the installation efficiency of the motherboard mounting member 6.

[0112] In some embodiments, the edge of the circuit main board 7 is provided with a third connection hole 71b. For example, as shown in Figures 14 and 15, the circuit main board 7 is provided with a third connection hole 71b at each of its four corners. Correspondingly, the main board mounting member 6 is further provided with a fourth connection hole 63b. The projection of the circumferential edge of the fourth connection hole 63b on the circuit main board 7 coincides with the circumferential edge of the third connection hole 71b, i.e., the fourth connection hole 63b is provided corresponding to the third connection hole 71b. Fasteners such as bolts and screws are sequentially passed through the third connection hole 71b and the fourth connection hole 63b, and the fasteners are threadedly connected to the fourth connection hole 63b to achieve installation and fixation between the circuit main board 7 and the main board mounting member 6. The above-mentioned method is used to achieve installation and fixation between the circuit main board 7 and the main board mounting member 6, and the installation operation is relatively simple and easy to operate.

[0113] In some embodiments, the edge of the motherboard mounting member 6 is provided with a first step structure 64, which extends along the periphery of the motherboard mounting member 6 and is sleeved on the periphery of the first clamping component 21, specifically, the first step structure 64 is sleeved on the periphery of the first clamping body 211, and the first step structure 64 also abuts against the top of the battery 3. The provision of the first step structure 64, on the one hand, enables the motherboard mounting member 6 to wrap around the side of the first clamping body 211, and can achieve further engagement between the motherboard mounting member 6 and the first clamping body 211, thereby making it more convenient to install the motherboard mounting member 6 on the first clamping member 21, thereby further improving the installation efficiency of the motherboard mounting member 6; on the other hand, it should be noted that since the clamping member 2, battery 3 and adjustment member 4 in the present application are all located in the housing 1, the housing 1 generally includes at least two shells, such as the housing 1 includes a top shell 11 and a bottom shell 13. The top shell 11 and the bottom shell 13 are connected to form a receiving space therebetween to accommodate the clamping member 2, the battery 3 and the adjusting member 4. At the same time, since the adjusting member 4 needs to be adjusted during assembly to make the clamping space 23 adapt to the size of the battery 3, the battery 3 and the clamping member 2 are usually assembled together first, and then the bottom of the battery 3 and the clamping member 2 as a whole are inserted into the internal space of the bottom shell 13 through the opening of the bottom shell 13, and finally the top shell 11 is assembled. This installation process is generally understood as the normal installation of the battery 3. However, since the depth of the inner space of the bottom shell 13 is usually much deeper than the depth of the inner space of the top shell 11 in the height direction of the battery 3, when the bottom of the battery 3 and the clamping member 2 are first installed into the inner space of the bottom shell 13 through the opening of the bottom shell 13, when the battery 3 and the clamping member 2 are released, there is still a certain distance between the bottom of the battery 3 and the clamping member 2 and the inner bottom surface of the bottom shell 13, so that the battery 3 and the clamping member 2 will collide with the bottom shell 13, which is easy to damage the battery 3 and the clamping member. The clamping member 2 and the bottom shell 13 may be damaged to a certain extent. Therefore, during assembly in this application, the battery 3 and the clamping member 2 are usually assembled together first, and then the top of the battery 3 and the clamping member 2 are connected to the top shell 11. Finally, the bottom shell 13 is placed on the outer periphery of the battery 3 and the clamping member 2, and the bottom shell 13 is connected to the top shell 11. This installation process is usually understood as the inverted installation of the battery 3. Compared with the battery 3 when the battery 3 is installed upright, the battery 3 can avoid the collision between the battery 3 and the clamping member 2 and the bottom shell 13 when the battery 3 is inverted. Based on this, the first step structure 64 abuts against the top of the battery 3, which can reduce the possibility of the battery 3 detaching from the clamping space 23 when the battery 3 is inverted.

[0114] In some embodiments, the outer surface of the motherboard mounting member 6 is provided with a wiring groove 65, and a dividing protrusion 651 is provided in the wiring groove 65 to divide the wiring groove 65 into a plurality of sub-wiring grooves 652. The plurality of sub-wiring grooves 652 are used to separate the wiring harness electrically connected to the circuit motherboard 7. In this way, the wiring groove 65 can be used to bundle and guide the wiring harness electrically connected to the circuit motherboard 7, thereby simplifying the wiring layout, thereby avoiding problems such as confusion, cross-distribution, and entanglement of the wiring harness, and thus reducing the wiring harness's occupation of the internal space of the housing 1. The wiring harness is also electrically connected to the power plug 114 on the housing 1 to establish an electrical connection between the power plug 114 and the circuit motherboard 7. Therefore, during discharge, the current output by the battery 3 is first transmitted to the circuit motherboard 7, then transmitted via the wiring harness to the power plug 114, and finally transmitted to the device to be charged, thereby discharging the battery 3. During charging, the external current is transmitted via the power plug 114 and the wiring harness to the circuit motherboard 7, and then transmitted to the battery 3, thereby charging the battery 3.

[0115] In some embodiments, the inner side wall of the shell 1 is further provided with a second side rib 133, which abuts against the mainboard mounting member 6, and the inner bottom wall of the shell 1 is provided with a bottom rib 134, and a partition 135 is provided between the bottom rib 134 and the second side rib 133, and the partition 135 is connected to the inner bottom wall of the shell 1 and abuts against the mainboard mounting member 6. On the one hand, the provision of the second side ribs 133 and the bottom ribs 134 can increase the structural strength of the outer shell 1, reduce the degree of deformation of the outer shell 1 when it is subjected to external extrusion, or prevent the outer shell 1 from deformation, so as to protect the battery 3 and the circuit main board 7 from being squeezed when the outer shell 1 is subjected to external extrusion; on the other hand, the provision of the second side ribs 133 and the partition 135 enables the main board mounting part 6 to be stopped by the second side ribs 133 and the partition 135, thereby limiting the position of the main board mounting part 6 in the outer shell 1, avoiding the main board mounting part 6, the circuit main board 7, the clamping part 2, and the battery 3 from shaking or moving as a whole, thereby avoiding collision with the circuit main board 7 and the battery 3, and protecting the circuit main board 7 and the battery 3.

[0116] In addition, in the present application, the partition 135 is not only connected to the second side ribs 133 and the bottom ribs 134, but also connected to the inner bottom wall of the outer shell 1. When the partition 135 abuts against the mainboard mounting member 6, the partition 135 will be constrained by the second side ribs 133, the bottom ribs 134 and the inner bottom wall of the outer shell 1. The second side ribs 133, the bottom ribs 134 and the inner bottom wall of the outer shell 1 can provide a restraining force for the partition 135, so that the partition 135 is not easily squeezed when abutted by the mainboard mounting member 6.

[0117] When the first side rib 131 and the second side rib 133 exist at the same time, not only can the first side rib 131 be used to limit the position of the clamping part 2 in the shell 1, but the second side rib 133 can also be used to limit the position of the mainboard mounting part 6 in the shell 1. This can better limit the position of the mainboard mounting part 6, the circuit main board 7, the clamping part 2, and the battery 3 as a whole in the shell 1, and the limiting effect is better, preventing collisions with the circuit main board 7 and the battery, thereby better protecting the circuit main board 7 and the battery 3.

[0118] In some embodiments, the second side rib 133 may be provided with a second guide surface 1331, such as a guide slope or a guide arc. The second guide surface 1331 is primarily used to guide the motherboard mounting member 6 to a predetermined position within the housing 1, such as the bottom of the housing 1. For example, a mounting opening is provided at one end of the housing 1, and the second side rib 133 may extend along the opening direction of the mounting opening to connect with the inner bottom wall of the housing 1. The second guide surface 1331 is provided on the side of the second side rib 133 facing away from the inner bottom wall of the housing 1. During assembly, the motherboard mounting member 6 can be inserted into the housing 1 through the mounting opening and, guided by the second guide surface 1331, installed to the bottom of the housing 1. This not only prevents the second side rib 133 from blocking or colliding with the motherboard mounting member 6 when the motherboard mounting member 6 is inserted into the housing 1 through the mounting opening, but also serves to guide the installation of the motherboard mounting member 6.

[0119] In some embodiments, as shown in Figures 13 to 16, the mainboard mounting member 6 is provided with a first vent 66 and a heat dissipation hole 67 that are connected to each other, and the housing 1 is provided with a second vent 111, which is connected to the first vent 66 and the heat dissipation hole 67 respectively; a fan 72 and electronic components 73 are provided on the circuit mainboard 7, and the fan 72 forms heat convection through the first vent 66, the heat dissipation hole 67 and the second vent 111 to achieve heat dissipation of the electronic components 73, thereby achieving cooling of the electronic components 73, avoiding the electronic components 73 from being always in a high-temperature environment, and avoiding failure of the electronic components 73, which is conducive to ensuring the normal operation of the electronic components 73 and improving the safety of the energy storage device 100.

[0120] Among them, when the fan 72 is started to dissipate heat for the electronic components 73, an exemplary embodiment is that the external gas enters the interior of the outer shell 1 from the second vent 111 under the action of the fan 72, and enters the cavity of the mainboard mounting part 6 through the heat dissipation hole 67, flows through the electronic components 73, takes away the heat of the electronic components 73, and then is discharged to the outside of the mainboard mounting part 6 from the first vent 66. Finally, part of the gas will be discharged to the outside of the outer shell 1 from the second vent 111, and the other part will re-enter the cavity of the mainboard mounting part 6 through the heat dissipation hole 67, thereby achieving the effect of dissipating heat for the electronic components 73. In another exemplary embodiment, the external air enters the interior of the outer shell 1 from the second vent 111 under the action of the fan 72, and enters the cavity of the mainboard mounting part 6 through the first vent 66, blows toward the electronic components 73 and flows through the electronic components 73, taking away the heat of the electronic components 73, and then is discharged to the outside of the mainboard mounting part 6 from the heat dissipation holes 67. Finally, part of the gas will be discharged to the outside of the outer shell 1 from the second vent 111, and the other part will re-enter the cavity of the mainboard mounting part 6 through the first vent 66, thereby achieving the effect of dissipating heat for the electronic components 73.

[0121] In the present application, there may be one or more heat dissipation holes 67. When there are multiple heat dissipation holes 67, the multiple heat dissipation holes 67 include a first sub-heat dissipation hole 67a located near the bottom of the battery 3, a second sub-heat dissipation hole 67b located near the top of the battery 3, and a third sub-heat dissipation hole 67c located near the middle of the battery 3. Providing multiple heat dissipation holes 67 allows air to enter the cavity of the motherboard mounting member 6 from multiple directions or flow out of the motherboard mounting member 6 from multiple directions when the fan 72 is activated to dissipate heat from the electronic components 73. This increases the air circulation rate and improves the heat dissipation effect.

[0122] Exemplarily, the first sub-heat dissipation hole 67a and one of the third sub-heat dissipation holes 67c can also allow the wire bundle to pass through and enter the cavity of the mainboard mounting component 6, that is, one end of a portion of the wire bundle can pass through the first sub-heat dissipation hole 67a and enter the cavity of the mainboard mounting component 6 to be electrically connected to the circuit mainboard 7 (such as the first conductive protrusion 74 on the circuit mainboard 7), and one end of another portion of the wire bundle can pass through one of the third sub-heat dissipation holes 67c and enter the cavity of the mainboard mounting component 6 to be electrically connected to the circuit mainboard 7 (such as the second conductive protrusion 75 on the circuit mainboard 7).

[0123] In some embodiments, as shown in Figures 13 to 18, the first vent 66 is provided near the top of the battery 3, and a first gap 1a is defined between the mainboard mounting member 6 and the inner side wall of the housing 1. The first side rib 131, the abutment plate 132, the second side rib 133, and the partition 135 are all located in the first gap 1a. The first gap 1a is respectively connected to the second vent 111, the second sub-heat dissipation hole 67b, and the third sub-heat dissipation hole 67c. A second gap 1b is defined between the mainboard mounting member 6 and the inner bottom wall of the housing 1. The second gap 1b is connected to the first gap 1a and the first sub-heat dissipation hole 67a respectively, so that when the fan 72 is started, the external air can enter the interior of the housing 1 from the second vent 111, and then can not only enter the cavity of the mainboard mounting member 6 through the first gap 1a and the second sub-heat dissipation hole 67b in sequence, but also can enter the cavity of the mainboard mounting member 6 through the first gap 1a and the third sub-heat dissipation hole 67c in sequence, and can also enter the cavity of the mainboard mounting member 6 through the first gap 1a, the second gap 1b and the first sub-heat dissipation hole 67a in sequence. Alternatively, external air enters from the second vent 111 and enters the cavity of the motherboard mounting member 6 through the first vent 66, and then is blown toward the electronic components 73 under the action of the fan 72 and flows through the electronic components 73, and then can not only be discharged from the second sub-heat dissipation hole 67b and the third sub-heat dissipation hole 67c to the outside of the motherboard mounting member 6 and enter the first gap 1a, but can also be discharged from the first sub-heat dissipation hole 67a to the outside of the motherboard mounting member 6, enter the second gap 1b and the first gap 1a in sequence, and finally flow out of the shell 1 from the second vent 111 or re-enter the cavity of the motherboard mounting member 6 through the first vent 66, so as to realize the circulation of air flow inside the shell 1, thereby achieving the effect of heat dissipation of the electronic components 73.

[0124] The inventors have found that the current flowing through the circuit board 7 is described by taking the energy storage device 100 in the discharge mode as an example. Assuming the first case: when the related technology connects three batteries 3 in series, the energy storage device 100 can usually achieve 1KWH of electricity. In this case, the voltage of the three batteries 3 input to the circuit board 7 after series connection is (3.2x3)V, and the current input to the circuit board 7 is 200W / (3.2x3)V=20A; the second case: when the related technology connects five batteries 3 in series, The energy storage device 100 can usually achieve 5KWH of power. In this case, the voltage of the five batteries 3 connected in series input to the circuit board 7 is (3.2x5)V, and the current input to the circuit board 7 is 1000W / (3.2x5)V=50A. In the present application, a single battery 3 is used, and the voltage of the battery 3 is 3.2V. The energy storage device 100 can achieve 1KWH of power. In this case, the voltage of the battery 3 input to the circuit board 7 is 3.2V, and the current input to the circuit board 7 is 200W / 3.2V=60A. It can be seen that the current flowing through the circuit board 7 of the present application is greater than the current flowing through the circuit board 7 in the related art, so the heat generated by the circuit board 7 is higher than both cases in the above-mentioned related art.

[0125] In view of this, the present application provides a third gap 1c between the partition 135 and the inner sidewall of the housing 1, and at least one end of the bottom rib 134 is spaced from the inner sidewall of the housing 1. Compared to an embodiment in which the third gap 1c does not exist between the partition 135 and the inner sidewall of the housing 1, that is, compared to an embodiment in which the partition 135 is directly connected to the inner sidewall of the housing 1, this not only reduces material usage and reduces the weight of the housing 1, thereby reducing costs and achieving a lightweight design, but also allows the third gap 1c to be utilized as a heat exchange space when the fan 72 is activated for heat dissipation, increasing the heat exchange space for the gas, thereby improving the heat dissipation effect. Furthermore, at least one end of the bottom rib 134 is spaced from the inner sidewall of the housing 1. When the fan 72 is activated for heat dissipation, the gas is not blocked by the end of the bottom rib 134 and can enter the third gap 1c without passing over the end of the bottom rib 134, facilitating gas circulation and further improving the heat dissipation effect.

[0126] Furthermore, partition 135 includes a first side surface 1351 facing away from the inner bottom wall and an inclined surface 1352 connected to first side surface 1351. Inclined surface 1352 is gradually inclined from its connection with first side surface 1351 toward the inner bottom wall toward bottom rib 134. This design of inclined surface 1352 allows air to flow through first gap 1a into second gap 1b, or vice versa, through second gap 1b into first gap 1a when fan 72 is operating. This facilitates air circulation and improves heat dissipation efficiency.

[0127] In some embodiments, the electronic components 73 include a first functional device 731 having a temperature greater than or equal to 110°C during operation. The functional component may be, but is not limited to, at least one of a bidirectional buck-boost converter, a bidirectional isolator, and an AC-DC converter. The temperature of the first functional device 731 may be, but is not limited to, 110°C, 115.4°C, 118.06°C, 120.9°C, 123.09°C, 125.7°C, 130.5°C, 134.5°C, 139.5°C, etc. The air outlet of the fan 72 is positioned toward the first functional device 731. The energy storage device 100 further includes heat dissipation fins 7a, which are disposed on a side of the first functional device 731 facing away from the first clamping member 21 and extend axially along the fan 72. In the present application, the air outlet of the fan 72 is directed toward the first functional component 731 whose temperature is relatively high in the operating state, and a heat dissipation fin 7a is arranged on the side of the first functional component 731 facing away from the first clamping component 21, which can quickly heat the first functional component 731 whose temperature is relatively high in the operating state, avoid safety accidents, and improve safety of use; at the same time, the heat dissipation fin 7a is also extended along the axial direction of the fan 72, so that the heat dissipation fin 7a can be used to effectively guide the gas flowing through the first functional component 731 (that is, the gas extracted or blown out by the fan 72), so that the gas can fully exchange heat with the first functional component 731, thereby improving the heat dissipation effect of the first functional component 731 and having a better heat dissipation effect.

[0128] In some embodiments, the projection of the circumferential edge of the second sub-heat dissipation hole 67b on the inner wall of the outer shell 1 is a first projection ring, and the projection of the first functional component 731 on the inner wall of the outer shell 1 is a first projection. The first projection is at least partially located within the first projection ring. In this way, the gas that exchanges heat with the first functional component 731 can be quickly discharged out of the mainboard mounting component 6, avoiding the gas staying around the first functional component 731 for a long time, which makes it difficult for the first functional component 731 to quickly cool down in a short time. This is conducive to improving the heat dissipation effect of the fan 72 on the first functional component 731.

[0129] In some embodiments, as shown in Figures 17 and 19, a waterproof and breathable membrane 111a is provided at the second vent 111. In this way, gas circulation inside and outside the housing 1 can be achieved through the second vent 111 to achieve a heat dissipation effect. At the same time, it can also play a waterproof role, preventing external liquid from entering the housing 1 through the second vent 111 and causing a short circuit in the battery 3 and the circuit board 7, thereby ensuring the safety of the energy storage device 100 and the battery performance.

[0130] In some embodiments, referring again to Figures 13, 17, and 19, the energy storage device 100 further includes a thermal insulator 8, such as a mica board. This thermal insulator 8 is disposed between the circuit board 7 and the first clamping member 21. This provides thermal insulation, thereby reducing or preventing heat generated by the battery 3 during thermal runaway from spreading to the circuit board 7, thereby preventing the fire from spreading to the circuit board 7 in the event of a battery 3 fire. For example, the thermal insulator 8 may be a mica board or a metal plate coated with a thermal insulation coating. The use of such a thermal insulator 8 can better isolate heat from a battery 3 during thermal runaway from spreading to the circuit board 7, providing enhanced thermal insulation. The mica board also prevents electrical breakdown and damage to the circuit board 7. The thermal insulation coating may be primarily composed of a thermal insulation material, such as, but not limited to, fiberglass, asbestos, rock wool, silicate, aerogel felt, vacuum panels, etc., exhibiting excellent thermal insulation properties to prevent heat exchange between the battery 3 and the circuit board 7.

[0131] Furthermore, a second through-slot 81 is provided on the periphery of the thermal insulation member 8, and a second bent member 215 is protruding from the first clamping member 21. Specifically, the second bent member 215 is protruding from the first clamping body 211. The second bent member 215 is passed through the second through-slot 81 and can be bent until it abuts against the thermal insulation member 8, thereby achieving the installation and fixation of the thermal insulation member 8 on the first clamping member 21. The above installation method facilitates the installation and fixation of the thermal insulation member 8.

[0132] In some embodiments, as shown in Figures 19 and 20, the energy storage device 100 also includes a grip 9, which is connected to the housing 1 so that when the energy storage device 100 is moved, the grip 9 can be grasped to lift the energy storage device 100 to move the energy storage device 100, thereby making it more convenient to move the energy storage device 100. In addition, a first groove 112 is provided on the top surface of the shell 1, and the grip 9 is at least partially accommodated in the first groove 112, and a gripping space for the user's hand to extend into to grip the grip 9 is formed between the grip 9 and the first groove 112. In the direction opposite to the depth direction of the first groove 112 (for example, the upward direction in Figure 19), the surface of the grip 9 facing away from the shell 1 is lower than the top surface of the shell 1 or flush with the top surface of the shell 1, so that when the shell 1 is placed on a placement plane such as a desktop, a table, or the ground, the shell 1 can be inverted, that is, the top surface of the shell 1 can be placed on the placement plane, so that the energy storage device 100 can be inverted on the placement plane.

[0133] Preferably, the surface of the gripping piece 9 facing away from the shell 1 is lower than the top surface of the shell 1. Compared with the manner in which the surface of the gripping piece 9 facing away from the shell 1 is flush with the top surface of the shell 1, it is difficult to keep the surface of the gripping piece 9 facing away from the shell 1 and the top surface of the shell 1 absolutely flush, that is, there is easily a height difference between the surface of the gripping piece 9 facing away from the shell 1 and the top surface of the shell 1, which will affect the stability of the shell 1 when it is inverted on the placement plane. Therefore, the manner in which the surface of the gripping piece 9 facing away from the shell 1 is flush with the top surface of the shell 1 can improve the stability of the shell 1 when it is inverted on the placement plane.

[0134] It should be noted that, since the clamping member 2, battery 3 and adjusting member 4 in the present application are all located inside the outer shell 1, the outer shell 1 generally includes at least two shells. For example, the outer shell 1 includes a top shell 11 and a bottom shell 13. The top shell 11 and the bottom shell 13 are connected, and the two form a receiving space to accommodate the clamping member 2, battery 3 and adjusting member 4. At the same time, since the adjusting member 4 needs to be adjusted during assembly of the present application to make the clamping space 23 adapt to the size of the battery 3, the battery 3 and the clamping member 2 are usually assembled together first, and then the bottom of the battery 3 and the clamping member 2 as a whole are inserted into the internal space of the bottom shell 13 from the opening of the bottom shell 13, and finally the top shell 11 is assembled. This installation process is usually understood as the normal installation of the battery 3. However, since the depth of the internal space of the bottom shell 13 is usually much deeper than the depth of the internal space of the top shell 11 in the height direction of the battery 3, when the bottom of the battery 3 and the clamping part 2 are first installed into the internal space of the bottom shell 13 from the opening of the bottom shell 13, when the battery 3 and the clamping part 2 are loosened, there is still a certain distance between the bottom of the battery 3 and the clamping part 2 and the inner bottom surface of the bottom shell 13, so that the battery 3 and the clamping part 2 will collide with the bottom shell 13, which may easily cause certain damage to the battery 3, the clamping part 2 and the bottom shell 13. Therefore, during assembly in this application, the battery 3 and the clamping part 2 are usually assembled together first, and then the top of the battery 3 and the clamping part 2 are connected to the top shell 11, and finally the bottom shell 13 is placed on the outer periphery of the battery 3 and the clamping part 2, and the bottom shell 13 is connected to the top shell 11. This installation process is usually understood as the inverted installation of the battery 3. When inverting, it is usually necessary to place the top surface of the top shell 11 (that is, the top surface of the outer shell 1) on a placement plane. Therefore, a first groove 112 is provided on the top surface of the outer shell 1 to accommodate part of the grip 9 or the entire grip 9, so that the top surface of the grip 9 facing away from the outer shell 1 can be lower than or flush with the top surface of the outer shell 1, so that the outer shell 1 can be inverted and can be placed flat on the placement plane stably, so that when the battery 3 and the clamping part 2 are assembled as a whole to the top shell 11, it can be relatively smooth, which facilitates the assembly of the battery 3 and the clamping part 2 as a whole to the top shell 11.

[0135] At the same time, when holding the grip 9 to lift the energy storage device 100, since the circuit main board 7 is located on one side of the battery 3 and the weight of the battery 3 is much heavier than the circuit main board 7, there is a large difference in weight between the two sides. Therefore, when the energy storage device 100 is carried while walking, it will not rub against the user's legs, thereby avoiding affecting walking.

[0136] When the grip 9 is disposed on the top of the housing 1, the second vent 111 is preferably disposed on the side wall of the housing 1. In this way, when the grip 9 is held to lift the energy storage device 100, the hot gas discharged through the second vent 111 can be prevented from contacting the user's hands, thereby preventing the user's hands from being scalded or wet.

[0137] In some embodiments, the surface of the gripping member 9 facing away from the housing 1 is flat, so as to ensure that the energy storage device 100 can be placed more stably and flatly on a placement surface when it is turned upside down.

[0138] In some embodiments, an annular protrusion 113 is provided on the top surface of the shell 1, and the annular protrusion 113 surrounds the outer periphery of the first groove 112, and in the protruding direction of the annular protrusion 113, the surface of the grip 9 facing away from the shell 1 is lower than the surface of the annular protrusion 113 facing away from the shell 1, so that when the shell 1 is inverted, the shell 1 can be placed stably and flatly on the placement plane; and compared with the manner in which the surface of the grip 9 facing away from the shell 1 is flush with the surface of the annular protrusion 113 facing away from the shell 1, since the surface of the grip 9 facing away from the shell 1 and the surface of the annular protrusion 113 facing away from the shell 1 are difficult to maintain absolute flushness, that is, there is easily a height difference between the surface of the grip 9 facing away from the shell 1 and the surface of the annular protrusion 113 facing away from the shell 1, which will affect the stability of the shell 1 when it is inverted on the placement plane, so the manner in which the surface of the grip 9 facing away from the shell 1 is lower than the top surface of the shell 1 can improve the stability of the shell 1 when it is inverted on the placement plane.

[0139] In one exemplary embodiment, the annular protrusion 113 may be located at the edge of the top surface of the shell 1, in which case the outer peripheral surface of the annular protrusion 113 is roughly flush with the outer side surface of the shell 1; in another exemplary embodiment, the annular protrusion 113 may be located between the first groove 112 and the outer side surface of the shell 1.

[0140] In some embodiments, as shown in FIG19 and FIG20 , the grip 9 is connected to the housing 1 at both ends along a first direction (e.g., along the left-right direction in FIG19 ), and the first groove 112 is an arc-shaped groove extending along the first direction. The first groove 112 has a groove wall 1121 disposed toward the grip 9. The groove wall 1121 is a cylindrical surface disposed around an axis parallel to the first direction, and the cross-sectional profile of the groove wall 1121 obtained by a plane perpendicular to the first direction is an arc. In this way, when the user's hand is inserted into the grip space to grip the grip 9, the groove wall 1121 of the first groove 112 is prevented from obstructing the user's hand and making it inconvenient to grip the grip 9, thereby facilitating the user's hand to enter the grip space and grip the grip 9.

[0141] In some embodiments, the grip 9 has a circumferential side surface 91 arranged toward the groove wall surface 1121. The circumferential side surface 91 is a cylindrical surface arranged around an axis parallel to the first direction, and the circumferential side surface 91 is arranged parallel to the groove wall surface 1121. This not only makes it convenient for the user's hand to reach into the holding space to hold the grip 9, but also when the user's hand holds the grip 9, the grip 9 can also adapt to the curved shape of the user's hand and fit well with the user's hand, so that the user's hand can hold the grip 9, thereby improving the comfort of the user holding the grip 9.

[0142] In some embodiments, as shown in Figures 20 and 21, the surface of the gripping member 9 facing the groove wall 1121 is provided with a plurality of first ribs 92 and a plurality of second ribs 93, the plurality of first ribs 92 are arranged at intervals along the first direction, the plurality of second ribs 93 are arranged at intervals along the second direction, and each second rib 93 is arranged crosswise with the plurality of first ribs 92; wherein, the surfaces of the plurality of first ribs 92 facing the groove wall 1121 form a circumferential side surface 91, and / or, the surfaces of the plurality of second ribs 93 facing the groove wall 1121 form a circumferential side surface 91, wherein the second direction is arranged perpendicular to the first direction, and the second direction is also arranged perpendicular to the depth direction of the first groove 112. By forming a plurality of first ribs 92 arranged along the first direction and a plurality of second ribs 93 arranged along the second direction on the surface of the grip 9 facing the groove wall 1121, it can not only strengthen the structural strength of the grip 9, but also increase the friction between the user's hand and the grip 9 to play an anti-slip role, thereby preventing the grip 9 from accidentally falling off the user's hand after the user grips the grip 9 to lift the energy storage device 100; and it also facilitates demolding.

[0143] In some embodiments, the surface of the grip 9 facing the groove wall 1121 is provided with a second threaded connection hole 941, and the housing 1 is further provided with a through hole 117. Bolts, screws, and other fasteners are sequentially inserted through the through hole 117 and the second threaded connection hole 941, and the fasteners are also threadedly connected to the second threaded connection hole 941 to achieve installation and fixation between the grip 9 and the housing 1. This can make the connection between the grip 9 and the housing 1 relatively firm; it is also easy to install and disassemble, has strong practicality, and is easy to operate. At the same time, because the nut of the fastener is located inside the housing 1, the surface of the grip 9 exposed outside the first groove 112 has no connection hole. This can prevent liquids such as rainwater from entering the interior of the housing 1 through the installation hole, thereby improving the waterproof performance of the housing 1.

[0144] Exemplarily, a mounting post 94 is protruding from the surface of the grip 9 facing the groove wall 1121, and the end face of the mounting post 94 facing the groove wall 1121 is provided with the aforementioned second threaded connection hole 941. In this way, there is no need to thicken the entire grip 9 in the depth direction of the first groove 112. Instead, only the thickness of the mounting post 94 in the depth direction of the first groove 112 can be increased. By local thickening, the depth of the second threaded connection hole 941 can be deepened to increase the connection area between the second threaded connection hole 941 and the fastener, further improving the connection stability between the grip 9 and the housing 1, and at the same time making the grip 9 relatively light, thereby facilitating a lightweight design of the grip 9.

[0145] Furthermore, mounting posts 94 are provided at both ends of the gripping member 9 in the first direction, and multiple mounting posts 94 are provided at each end of the gripping member 9 in the first direction, such as two mounting posts 94, three mounting posts 94 or four mounting posts 94, etc., so that the gripping member 9 can be mounted and fixed to the outer shell through multiple fasteners, thereby further improving the connection stability between the gripping member 9 and the outer shell 1.

[0146] In some embodiments, as shown in FIG17 and FIG22 , a power plug 114 is provided on a side wall of the housing 1 arranged along the first direction. The power plug 114 can be plugged into a power cord, so that the battery 3 can be charged by connecting an external power source through the power cord, and / or the device to be charged can be charged by connecting an external power source through the power cord. Furthermore, the projection of the grip 9 on the side wall of the housing 1 arranged along the first direction is a second projection, and the second projection at least partially overlaps with the power plug 114 in the depth direction of the first groove 112. Thus, when plugging or unplugging the power cord, the user can hold the grip 9 with one hand and hold the power cord with the other hand to plug the power cord into the power connector or unplug the power cord from the power plug 114. At this time, the force exerted by the user's hand on the grip 9 can counteract the force exerted on plugging or unplugging the power cord, thereby facilitating plugging or unplugging the power cord.

[0147] In some embodiments, the power plug 114 is located at the top of the housing 1, so that the power plug 114 can be arranged close to the grip 9, and / or, in the depth direction of the first groove 112, the distance between the power plug 114 and the top surface of the housing 1 is d1, and the distance between the top surface of the housing 1 and the bottom surface of the housing 1 is d2, d1 / d2=1 / 25-4 / 25, for example, d1 / d2=1 / 25, 3 / 50, 2 / 25, 1 / 10, 3 / 25, 7 / 50 or 4 / 25, so that the distance between the grip 9 and the power plug 114 can be set very close. Through the above design, compared to setting the power plug 114 at the bottom of the housing 1, the distance between the power plug 114 and the grip 9 is closer, and when plugging and unplugging the power cord, better force can be applied to pull the power plug 114 out of the power plug 114 or insert the power cord into the power plug 114.

[0148] For example, the power plug 114 may include three sub-power plugs, one of which is used to charge the energy storage device 100 to a device to be charged; and the remaining two sub-power plugs are used to charge the energy storage device 100, wherein one of the remaining two sub-power plugs is a mains charging plug and the other is a photovoltaic charging plug. This facilitates the charging and discharging of the energy storage device 100.

[0149] In some embodiments, please refer to Figures 19 and 20 again. A second functional device 115 is also protruded from the top surface of the shell 1. The second functional device 115 can be electrically connected to the circuit main board 7, and the second functional device 115 is located in the annular protrusion 113. In the protruding direction of the annular protrusion 113 (such as the upward direction in Figure 19), the surface of the second functional device 115 facing away from the shell 1 is lower than the surface of the annular protrusion 113 facing away from the shell 1. In this way, when the shell 1 is turned upside down on the placement plane, the second functional device 115 can be prevented from contacting the placement plane or sliding relative to each other, thereby reducing wear on the second functional device 115.

[0150] Optionally, the second functional device 115 may be, but is not limited to, at least one of an indicator light and a power button. When the second functional device 115 is an indicator light, there may be multiple indicator lights, and the multiple indicator lights can be used to indicate the current power level and charging status of the energy storage device 100. For example, if there are four indicator lights, and when the energy storage device 100 is not being charged, all four indicator lights are on, then the energy storage device 100 is approximately fully charged. Similarly, the fewer indicator lights that are on, the less power the energy storage device 100 has, until all four indicator lights are off, at which point the power of the energy storage device 100 is zero. When charging the energy storage device 100, assuming that at the beginning, the four indicator lights flash in sequence, when a certain power level is reached, one indicator light is constantly on, and the remaining three indicator lights flash in sequence until all four indicator lights are constantly on, indicating that the energy storage device 100 is fully charged. When the second functional device 115 is a power button, pressing the power button can control the circuit board 7 to implement a corresponding function. For example, pressing the power button can control the circuit board 7 to turn the energy storage device 100 on and off. By making the surface of the second functional device 115 facing away from the housing 1 lower than the surface of the annular protrusion 113 facing away from the housing 1, the power button can be prevented from being continuously squeezed when the housing 1 is inverted onto a flat surface, thereby preventing the energy storage device 100 from constantly switching between on and off. This can ensure the service life of the energy storage device 100.

[0151] In actual production, multiple energy storage devices 100 are produced in batches, or in actual purchase, users may purchase multiple energy storage devices 100 as backup batteries 3. To save space, multiple energy storage devices 100 are usually stacked vertically.

[0152] In order to improve the stability of two adjacent stacked energy storage devices 100, in some embodiments, as shown in Figures 19 and 23, a limiting protrusion 136 is convexly provided on the bottom surface of the shell 1, wherein the projection of the annular protrusion 113 on the top surface of the shell 1 on the bottom surface of the shell 1 is a second projection ring, and the projection of the limiting protrusion 136 on the bottom surface of the shell 1 is a third projection, which is located within the second projection ring, and the outer contour of the third projection abuts the inner contour of the second projection ring. In this way, when multiple energy storage devices 100 are stacked in the vertical direction, for any two adjacent energy storage devices 100, the limiting protrusion 136 of the energy storage device 100 located above can cooperate and engage with the annular protrusion 113 of the energy storage device 100 located below, so that any two adjacent stacked energy storage devices 100 can be stably stacked together, thereby preventing the energy storage device 100 located above from falling.

[0153] Optionally, there may be multiple limiting protrusions 136, which are spaced apart along the circumference of the housing 1, and the third projection formed by each limiting protrusion 136 is located within the second projection ring, and the third projection formed by each limiting protrusion 136 abuts the inner contour of the second projection, which can further improve the stability of two adjacent energy storage devices 100 stacked together. For example, the housing 1 in the present application is in the shape of a rectangular parallelepiped, and its top and bottom surfaces are both rectangular surfaces. The annular protrusion 113 is a rectangular annular structure located at the edge of the top surface. There are four limiting protrusions 136, and one limiting protrusion 136 is located at a corner of the bottom surface. The four limiting protrusions 136 are all engaged with the annular protrusion 113. Furthermore, the limiting protrusion 136 may be an L-shaped structure, including a first portion and a second portion connected at an angle, wherein the first portion extends along the short side of the bottom surface, and the second portion extends along the long side of the bottom surface, thereby increasing the contact area between the annular protrusion 113 and the limiting protrusion 136, thereby facilitating improvement in the stability of two adjacent stacked energy storage devices 100.

[0154] In some optional embodiments, the housing 1 may include a top shell 11 and a bottom shell 13, the top shell 11 and the bottom shell 13 being connected, the first clamping member 21 and the second clamping member 22 being disposed within the bottom shell 13, and the first clamping member 21 and the second clamping member 22 being respectively connected to the top shell 11, and the adjusting member 4 being located within the bottom shell 13. Providing the housing 1 with a shell structure including the top shell 11 and the bottom shell 13 facilitates assembly of components such as the battery 3, the first clamping member 21, the second clamping member 22, and the adjusting member 4 into the interior of the housing 1. Furthermore, since the housing 1 only includes the top shell 11 and the bottom shell 13, the number of components is relatively small, the structure is relatively simple, and installation is facilitated while also reducing costs.

[0155] In other optional embodiments, as shown in Figures 2 and 24, the housing 1 may include a top shell 11, an intermediate shell 12, and a bottom shell 13. The intermediate shell 12 is located between the top shell 11 and the bottom shell 13, and the intermediate shell 12 is connected to the top shell 11 and the bottom shell 13 respectively. The first clamping part 21 and the second clamping part 22 are arranged in the bottom shell 13, and the first clamping part 21 and the second clamping part 22 are respectively connected to the intermediate shell 12. The adjusting member 4 is located in the bottom shell 13. Compared with the method in which the housing 1 includes a top shell 11 and a bottom shell 13, an additional intermediate shell 12 connected to the top shell 11 is added, and the first clamping part 21, the second clamping part 22 and the bottom shell 13 are respectively connected to the intermediate shell 12. In this way, the intermediate shell 12 can be used to bear part of the force of the top shell 11, thereby increasing the structural strength of the top shell 11, improving the bearing capacity of the top shell 11 when lifting the energy storage device 100, and improving the service life of the top shell 11.

[0156] In some embodiments, in combination with Figures 8, 9, 10, 25, 31 and 32, the first clamping component 21 also includes a first mounting flange 216 connected to the first clamping body 211, and the first mounting flange 216 is provided with a first mounting hole 2161. The intermediate shell 12 is also provided with a second mounting hole 128, and the second mounting hole 128 is a threaded hole. The first fasteners such as bolts and screws are sequentially passed through the first mounting hole 2161 and the second mounting hole 128, and the first fasteners are also threadedly connected to the second mounting hole 128 to achieve installation and fixation between the first clamping component 21 and the intermediate shell 12. Similarly, the second clamping component 22 also includes a second mounting flange 223 connected to the second clamping body 221. The second mounting flange 223 is provided with a third mounting hole 2231. The intermediate shell 12 is also provided with a fourth mounting hole 129. The fourth mounting hole 129 is a threaded hole. The second fasteners such as bolts and screws are sequentially passed through the third mounting hole 2231 and the fourth mounting hole 129, and the second fasteners are also threadedly connected to the fourth mounting hole 129 to achieve installation and fixation between the second clamping component 22 and the intermediate shell 12.

[0157] The first clamping member 21 and the second clamping member 22 are respectively threadedly connected to the intermediate housing 12 by fasteners such as screws or bolts, which can make the connection between the clamping member 2 and the intermediate housing 12 relatively firm, so as to ensure that the intermediate housing 12 can share part of the force from the clamping member 2 and the battery 3, thereby improving the load-bearing capacity of the intermediate housing 12; and it is easy to install and disassemble, has strong practicality, and is easy to operate.

[0158] Exemplarily, the first mounting flange 216 is provided with a plurality of first mounting holes 2161, and correspondingly, the intermediate shell 12 is provided with a plurality of second mounting holes 128, the circumferential edge of a second mounting hole 128 coincides with the projection ring on the first mounting flange 216 and the circumferential edge of a first mounting hole 2161, a first fastener is sequentially passed through a first mounting hole 2161 and a second mounting hole 128, and a first fastener is threadedly connected to a second mounting hole 128, so that the first clamping component 21 can be installed and fixed to the intermediate shell 12 through the plurality of first fasteners, thereby further improving the connection stability of the first clamping component 21 and the intermediate shell 12.

[0159] Similarly, the second mounting flange 223 is provided with a plurality of third mounting holes 2231, and correspondingly, the intermediate shell 12 is provided with a plurality of fourth mounting holes 129, the circumferential edge of a fourth mounting hole 129 coincides with the projection ring on the second mounting flange 223 and the circumferential edge of a third mounting hole 2231, a second fastener is sequentially passed through a third mounting hole 2231 and a fourth mounting hole 129, and a second fastener is threadedly connected to a fourth mounting hole 129, so that the second clamping component 22 can be installed and fixed to the intermediate shell 12 through the plurality of second fasteners, thereby further improving the connection stability of the second clamping component 22 and the intermediate shell 12.

[0160] In some embodiments, as shown in Figures 23 to 29 , the intermediate shell 12 is embedded in the top shell 11, and a stop protrusion 121 is convexly provided on the outer circumferential surface of the intermediate shell 12. The stop protrusion 121 is arranged along the circumference of the intermediate shell 12, and the stop protrusion 121 has a first stop surface 1211 facing the top shell 11. The first stop surface 1211 abuts against the end surface of the top shell 11. It can be understood that the state shown in Figure 23 can be understood as the state in which the outer shell 1 is placed upside down on the placement plane, and the state shown in Figure 24 can be understood as the state in which the outer shell 1 is placed upright on the placement plane. Typically, when the housing 1 is placed on a flat surface, the housing 1 is placed upright on the flat surface, that is, the bottom surface of the bottom shell 13 is in contact with the flat surface, so the liquid on the housing generally flows from top to bottom. For example, on a rainy day, when rainwater falls and drips onto the housing, the rainwater on the top shell will generally flow from top to bottom under the action of gravity. Even if the rainwater flows into the gap between the top shell 11 and the first stop surface 1211, since the intermediate shell 12 is embedded in the top shell 11, the portion of the intermediate shell 12 located in the top shell 11 forms an upward barrier. Under the action of gravity, the rainwater cannot flow upward along the portion of the intermediate shell 12 embedded in the top shell 11, thereby achieving a waterproof design. It can be seen that by providing a stop protrusion 121 on the outer circumferential surface of the intermediate shell 12, and by embedding the intermediate shell 12 in the top shell 11, so that the first stop surface 1211 of the stop protrusion 121 abuts against the end surface of the top shell 11, a waterproof design of the housing 1 can be achieved.

[0161] Illustratively, in a direction perpendicular to the first abutment surface 1211, the length of the portion of the intermediate housing 12 embedded in the top housing 11 is 0.3 cm to 1.5 cm, such as 0.3 cm, 0.4 cm, 0.5 cm, 0.6 cm, 0.65 cm, 0.7 cm, 0.75 cm, 0.8 cm, 0.85 cm, 0.9 cm, 1.0 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm, or 1.5 cm. By controlling the length of the portion of the intermediate housing 12 embedded in the top housing 11 within the above range, the length of the portion of the intermediate housing 12 embedded in the top housing 11 is prevented from being too short, thereby ensuring that the portion of the intermediate housing 12 embedded in the top housing 11 can achieve a waterproof effect of blocking rainwater.

[0162] As an optional embodiment, as shown in Figures 26 to 28, the bottom shell 13 is embedded in the stop protrusion 121 and / or the intermediate shell 12, that is, the bottom shell 13 can be only embedded in the stop protrusion 121 and not extend into the intermediate shell 12 (as shown in Figure 26), or it can be only embedded in the intermediate shell 12 (as shown in Figure 27), or the bottom shell 13 can be partially located in the intermediate shell 12 and partially located in the stop protrusion 121 (as shown in Figure 28), wherein the stop protrusion 121 also has a second stop surface 1212 arranged toward the bottom surface of the bottom shell 13. As mentioned above, when the energy storage device 100 is placed on a placement plane, the energy storage device 100 is usually placed directly on the placement plane, that is, the bottom surface of the bottom shell 13 is in contact with the placement plane, so the liquid on the outer shell 1 generally flows from top to bottom. For example, on rainy days, when rain falls down and drips onto the outer shell, the rainwater in the top shell usually flows from top to bottom under the action of gravity. Even if the rainwater flows into the gap between the second stop surface 1212 and the bottom shell 13, since the bottom shell 13 is embedded in the intermediate shell 12 and / or the stop protrusion 121, the part of the bottom shell 13 located in the intermediate shell 12 and / or the stop protrusion 121 is equivalent to forming an upward barrier. Under the action of gravity, the rainwater cannot go up along the part of the bottom shell 13 embedded in the intermediate shell 12 and / or the stop protrusion 121, thereby realizing a waterproof design.

[0163] As another optional embodiment, as shown in Figure 29, the stop protrusion 121 also has a second stop surface 1212 arranged toward the bottom surface of the bottom shell 13, the intermediate shell 12 is embedded in the bottom shell 13, the stop protrusion 121 is located outside the bottom shell 13, and the second stop surface 1212 abuts against the end surface of the bottom shell 13; the energy storage device also includes a seal 9a, which is arranged on the outer peripheral surface of the intermediate shell 12 and is arranged around the circumference of the intermediate shell 12, and the seal 9a is sealed and abutted against the inner side wall of the bottom shell 13, so that the inner side wall of the bottom shell 13 will squeeze the seal 9a, so the seal 9a will be deformed under the action of the extrusion force to block the connection gap between the inner side wall of the bottom shell 13 and the outer peripheral surface of the intermediate shell 12, thereby playing a role of sealing and waterproofing, thereby improving the waterproof performance of the outer shell 1.

[0164] Optionally, the sealing member 9a is elastic, for example, the sealing member 9a can be a sealing ring or sealant such as a silicone ring, a rubber ring, a plastic ring or a foam ring.

[0165] In some embodiments, as shown in Figure 30, one end of the intermediate shell 12 is embedded in the top shell 11, and the other end of the intermediate shell 12 is embedded in the bottom shell 13, and the stop protrusion 121 is located between the top shell 11 and the bottom shell 13. In the protruding direction of the stop protrusion 121 relative to the outer peripheral surface of the intermediate shell 12 (such as the x0-x1 direction in Figure 30), the outer peripheral surface of the top shell 11 and the outer peripheral surface of the bottom shell 13 are flush, and the outer peripheral surface of the intermediate shell 12 is lower than the outer peripheral surface of the top shell 11.

[0166] By providing a stop protrusion 121 on the outer peripheral surface of the intermediate shell 12, steps can be formed on both sides of the intermediate shell 12, so that the steps on both sides of the intermediate shell 12 can be used to cooperate with the top shell 11 and the bottom shell 13 respectively. In this way, the path for external liquids such as raindrops to enter the outer shell 1 can be extended, thereby improving the waterproof performance of the outer shell 1. Moreover, in the protruding direction of the stop protrusion 121 relative to the outer peripheral surface of the intermediate shell 12, the outer peripheral surface of the top shell 11 and the outer peripheral surface of the bottom shell 13 are arranged flush, and the outer peripheral surface of the intermediate shell 12 is lower than the outer peripheral surface of the top shell 11. Even when the energy storage device 100 in the present application is placed outdoors and it rains, rainwater will flow from the outer peripheral surface of the top shell 11 in the direction toward the bottom shell 13, and when the rainwater flows to the edge of the top shell 11, the rainwater will directly drip onto the outer peripheral surface of the bottom shell 13 under the action of its gravity, and continue to flow along the outer peripheral surface of the bottom shell 13, and will not penetrate into the interior of the outer shell 1 from the connection between the top shell 11 and the intermediate shell 12, and the connection between the bottom shell 13 and the intermediate shell 12. This can further improve the waterproof performance of the outer shell 1.

[0167] In some embodiments, as shown in Figures 30 to 32, a second step structure 122 is provided at one end of the intermediate shell 12 embedded in the bottom shell 13. The second step structure 122 includes a first step surface 1221 and a second step surface 1222 connected at an angle. The orientation of the first step surface 1221 is the same as the orientation of the second stop surface 1212. The orientation of the second step surface 1222 is the same as the orientation of the outer peripheral surface of the intermediate shell 12. The second step surface 1222 is protruding with a plurality of clamping protrusions 1223 arranged at intervals along the circumference of the intermediate shell 12. The plurality of clamping protrusions 1223 are all spaced apart from the first step surface 1221, and the seal 9a is embedded between the first step surface 1221 and the clamping protrusion 1223. The second step structure 122 is set, and a clamping protrusion 1223 is protruded on the second step surface 1222, so that the clamping protrusion 1223 cooperates with the first step surface 1221 and the second step surface 1222 to define the installation position of the seal 9a, which not only plays a role in positioning and limiting the installation of the seal 9a, but also facilitates the installation of the seal 9a. At the same time, when the seal 9a is deformed by the extrusion of the bottom shell 13 and the intermediate shell 12, the first step surface 1221 and the clamping protrusion 1223 have a restraining effect on the deformation of the seal 9a, avoiding the seal 9a from undergoing a large deformation along the direction pointing from the first step surface 1221 to the clamping protrusion 1223, but ensuring that the seal 9a is mainly deformed in the direction perpendicular to the second step surface 1222, so as to ensure that the seal 9a can be more closely attached to the inner wall of the bottom shell 13, thereby achieving a better sealing effect.

[0168] In addition, the provision of the second step structure 122 can further extend the path for external liquids such as raindrops to enter the housing 1, thereby improving the waterproof performance of the housing 1.

[0169] In some embodiments, as shown in conjunction with Figures 31 to 33 , the first abutment surface 1211 is provided with a second groove 1211a. For example, the second groove 1211a can be an annular groove extending along the circumference of the intermediate housing 12. The provision of the second groove 1211a ensures that even if rainwater flows into the gap between the top shell 11 and the first abutment surface 1211, the rainwater will flow into the second groove 1211a under the action of gravity, so that the rainwater can be temporarily stored in the second groove 1211a, thereby further improving the waterproof effect of the housing 1.

[0170] In some embodiments, a second reinforcing rib 129a is protruding from the outer circumference of the intermediate housing 12. The second reinforcing rib 129a is connected to the first stop surface 1211 and is located within the top housing 11. The provision of the second reinforcing rib 129a helps to enhance the structural strength of the intermediate housing 12 and improve the load-bearing capacity of the intermediate housing 12.

[0171] Exemplarily, part of the second reinforcing rib 129a is located in the second groove 1211a, so that the second groove 1211a can be divided into at least two relatively independent sub-grooves, so as to prevent rainwater flowing into the second groove 1211a from different positions from existing in different sub-grooves, thereby preventing rainwater flowing into the second groove 1211a from different positions from flowing and spreading freely in the second groove, which can also improve the waterproof effect of the shell to a certain extent.

[0172] In some embodiments, as shown in Figures 33 and 34, a protrusion 137 is provided on the inner wall of the bottom shell 13, and the protrusion 137 is provided with a plug-in groove 1371. The other side of the intermediate shell 12 is provided with a plug-in block 123, and the plug-in block 123 is plugged into the plug-in groove 1371 to achieve a connection between the intermediate shell 12 and the bottom shell 13, thereby facilitating the assembly and installation between the intermediate shell 12 and the bottom shell 13.

[0173] Furthermore, the plug-in block 123 is arranged on the second step surface 1222, and the plug-in block 123 is spaced apart from the first step surface 1221, and the plug-in block 123 is located on the circumferential side of the clamping protrusion 1223 of the intermediate shell 12, and the plug-in block 123 abuts against the seal 9a. In this way, in addition to utilizing the cooperation between the first step surface 1221 and the clamping protrusion 1223 to constrain the deformation of the seal 9a in the direction from the first step surface 1221 to the clamping protrusion 1223, the cooperation between the plug-in block 123 and the first step surface 1221 can also be utilized to constrain the deformation of the seal 9a in the direction from the first step surface 1221 to the clamping protrusion 1223, so as to ensure that the seal 9a mainly deforms in the direction perpendicular to the second step surface 1222, so as to ensure that the seal 9a can be more closely attached to the inner wall of the bottom shell 13, thereby achieving a better sealing effect.

[0174] In some embodiments, as shown in conjunction with Figures 2, 25, and 31 to 33, the first mounting flange 216 and the second mounting flange 223 are both located on the small side of the battery 3, that is, the first mounting flange 216 and the second mounting flange 223 are both located on the side of the battery 3 in the length direction. Furthermore, the plug-in block 123 includes a first plug-in block 123a and a second plug-in block 123b. The first plug-in block 123a is located on the large side of the battery 3, and the second plug-in block 123b is located on the small side of the battery 3. In other words, the first plug-in block 123a is located on the side of the battery 3 in the width direction, and the second plug-in block 123b is located on the side of the battery 3 in the length direction. In other words, the second plug-in block 123b and the first mounting flange 216 and the second mounting flange 223 are located on the same side of the battery 3. In addition, the side of the intermediate shell 12 in the width direction of the battery 3 is arranged with multiple first plug-in blocks 123a arranged at intervals along the width direction of the battery, and the side of the intermediate shell 12 in the length direction of the battery 3 is arranged with a second plug-in block 123b, that is, the plug-in blocks 123 arranged on the large surface side are more than the plug-in blocks 123 arranged on the small surface side, so that the intermediate shell 12 is more evenly loaded by the bottom shell 13, and the second plug-in block 123b is arranged near the first mounting flange 216, so that the connection between the bottom shell 13 and the intermediate shell 12 is closer to the connection between the first clamping component 21 and the intermediate shell 12, so that the load borne by the intermediate shell 12 from the bottom shell 13 can match the load borne by the intermediate shell 12 from the battery 3 and the clamping component 2 as a whole, which is beneficial to improving the load-bearing capacity of the intermediate shell 12.

[0175] Illustratively, the second plug-in block 123b includes a first plug-in plate 123b1 and a second plug-in plate 123b2. The first plug-in plate 123b1 extends along the length of the battery 3. The second plug-in plate 123b2 is connected to the first plug-in plate 123b1 at an angle and extends along the width of the battery 3. The second plug-in plate 123b2 is spaced apart from the outer circumference of the first clamping member 21, allowing a screwdriver to penetrate the gap between the second plug-in plate 123b2 and the outer circumference of the first clamping member 21 to tighten or loosen the first fastener, thereby achieving installation, fixation, or removal of the first clamping member 21 and the intermediate housing 12. The second plug-in plate 123b2 is plugged into the insertion slot 1371 on the protrusion 137, while the first plug-in plate 123b1 is located outside the insertion slot 1371. Moreover, the protrusion used to form the plug-in slot 1371 for plugging with the second plug-in board 123b2 is provided with openings connected to the plug-in slot 1371 on its two side surfaces in the width direction of the battery 3. In other words, the plug-in slot 1371 for plugging with the second plug-in board 123b2 does not have a slot side wall in the width direction of the battery 3. This allows the intermediate shell 12 and the bottom shell 13 to have a certain assembly error during installation. That is, after ensuring that each first plug-in block 123a is inserted into the plug-in slot 1371 on the bottom shell 13, if there is an assembly error, the second plug-in block 123b will not be unable to be plugged in, but the second plug-in board 123b2 can be inserted into the plug-in slot 1371, thereby ensuring that the intermediate shell 12 and the bottom shell 13 can be smoothly assembled together.

[0176] In some embodiments, as shown in Figures 33 and 35, one of the intermediate shell 12 and the top shell 11 is provided with an anti-foolproof protrusion 116, and the other of the intermediate shell 12 and the top shell 11 is provided with an anti-foolproof groove 124. The anti-foolproof protrusion 116 and the anti-foolproof groove 124 cooperate and snap into place so that the intermediate shell 12 and the top shell 11 can only be installed in a specific direction, which has an anti-foolproof effect on the installation between the intermediate shell 12 and the top shell 11 and avoids reverse installation.

[0177] In some embodiments, as shown in Figures 2, 23, and 33, the battery 3 is provided with an explosion-proof valve 31, the side wall of the top shell 11 is provided with a second vent 111, the second vent 111 is provided with a waterproof breathable membrane 111a, and the intermediate shell 12 is provided with an air vent 125 connected to the second vent 111. The air vent 125 is used to discharge the gas discharged through the explosion-proof valve 31 to the second vent 111 when the explosion-proof valve 31 is exploded. That is, when thermal runaway occurs in the battery 3, the explosion-proof valve 31 will explode to discharge the high-temperature and high-pressure gas generated by the battery 3 to the vent 125, and the high-temperature and high-pressure gas discharged to the vent 125 will be discharged to the outside of the shell 1 through the waterproof and breathable membrane 111a at the second vent 111, so as to avoid the explosion of the energy storage device 100 and improve the safety of the energy storage device 100; at the same time, since the waterproof and breathable membrane 111a is provided at the second vent 111, it can play a waterproof role without affecting the explosion-proof performance of the explosion-proof valve 31, thereby preventing external liquid from entering the shell 1 through the second vent 111 and causing a short circuit between the battery 3 and the circuit board 7, thereby ensuring the safety of the energy storage device 100 and the battery performance.

[0178] It should be known that when the explosion-proof valve 31 explodes, the explosion-proof valve 31 will open in the direction away from the battery 3. The air vent 125 is opened on the intermediate shell 12, which not only allows ventilation, but also reserves a certain amount of space for the explosion-proof valve 31 when it explodes, accommodating part of the explosion-proof valve 31 after the explosion, thereby preventing the explosion-proof valve 31 from impacting other components after the explosion and protecting other components.

[0179] In addition, since the second vent 111 is arranged on the side wall of the housing 1, when holding the handle 9 to lift the energy storage device 100, the hot gas discharged through the second vent 111 can be prevented from contacting the user's hands, thereby preventing the user's hands from being scalded or wet.

[0180] In some embodiments, the circuit main board 7 is arranged in the bottom shell 13, and the circuit main board 7 is located on one side of the battery 3. The intermediate shell 12 is provided with a mounting groove 126 for installing the fan 72. The projection of the circumferential edge of the mounting groove 126 on the inner bottom wall of the bottom shell 13 is a third projection ring, and the projection of the circuit main board 7 on the inner bottom wall of the bottom shell 13 is a fourth projection. Part of the fourth projection is located in the third projection ring. In this way, when the fan 72 is installed in the mounting groove 126, the fan 72 can make the gas around the circuit main board 7 flow to dissipate heat from the circuit main board 7.

[0181] In some embodiments, in combination with Figures 2, 31, 32 and 33, the energy storage device 100 also includes an electrical connector 9b, which is electrically connected to the battery 3 and the circuit main board 7 respectively to achieve electrical connection between the battery 3 and the circuit main board 7, and the intermediate shell 12 is also provided with an avoidance groove 127 for avoiding the electrical connector 9b, thereby avoiding interference between the intermediate shell 12 and the electrical connector 9b to ensure that the various components can be assembled together; at the same time, the electrical connector 9b can also be limited.

[0182] Exemplarily, the electrical connector 9b may be a copper connecting piece, an aluminum connecting piece, or an electrical connecting wire.

[0183] During discharge, the current output by the battery 3 is first transmitted to the circuit main board 7 through the electrical connector 9b, and then transmitted to the power plug 114 through the wiring harness, and finally transmitted to the device to be charged, so as to realize the discharge of the battery 3; while during charging, the external current is transmitted to the circuit main board 7 through the power plug 114 and the wiring harness, and then transmitted to the battery 3 through the electrical connector 9b, so as to realize the charging of the battery 3.

[0184] Example 2

[0185] The inventors' research has revealed that energy storage devices in related art typically combine multiple batteries connected in series to form a battery pack, which is then placed within a housing to form a single energy storage device. However, the batteries expand during the charging and discharging process, which can cause degradation in their performance, increase safety risks, and reduce the performance of the energy storage device. Furthermore, this expansion can compress the circuit board, damaging the electronic components on it and impacting the performance of the energy storage device.

[0186] Based on this, an embodiment of the present application provides an energy storage device that can prevent the expansion of the battery from affecting the circuit board. Specifically, as shown in Figures 1 to 35, the energy storage device 100 provided in the embodiment of the present application includes a housing 1, a clamping member 2, a battery 3, a mainboard mounting member 6, and a circuit board 7. The clamping member 2 is disposed in the housing 1 and has a clamping space 23. The battery 3 is disposed in the clamping space 23. The mainboard mounting member 6 is built into the housing 1 and connected to the clamping member 2. The mainboard mounting member 6 is located on one side of the battery 3. The circuit board 7 is built into the housing 1 and mounted on the mainboard mounting member 6. The circuit board 7 is electrically connected to the battery 3, and there is a gap between the circuit board 7 and the first clamping member 21. This provides expansion space for the battery 3 to prevent the battery 3 from squeezing the circuit board 7 when it expands, thereby protecting the circuit board 7.

[0187] By adding a clamping member 2, the battery 3 is built into the clamping space 23 of the clamping member 2, so that the clamping member 2 can be used to clamp the battery 3 to reduce expansion and reduce the squeezing of the circuit main board 7. On this basis, the present application also installs the circuit main board 7 on the clamping member 2 through the main board mounting member 6, so as to install and support the circuit main board 7 with the help of the main board mounting member 6, so that there can be a distance between the circuit main board 7 and the clamping member 2, so that the distance can be used to provide expansion space for the battery 3, avoiding squeezing the circuit main board when the battery 3 expands, thereby better avoiding squeezing the circuit main board 7 when the battery 3 expands, and providing better and more effective protection for the circuit main board 7.

[0188] The specific description of the housing 1, clamping member 2, battery 3, mainboard mounting member 6, and circuit mainboard 7 in this embodiment can be found in the description of the first embodiment, and will not be repeated here. Furthermore, the energy storage device 100 in this embodiment also includes an adjustment member 4, a strap 5, heat dissipation fins 7a, a thermal insulation member 8, a gripping member 9, a sealing member 9a, and an electrical connector 9b. The specific description of the adjustment member 4, strap 5, heat dissipation fins 7a, thermal insulation member 8, sealing member 9a, and electrical connector 9b can be found in the description of the first embodiment, and will not be repeated here.

[0189] Example 3

[0190] After research, the inventors found that the energy storage device in the related art usually includes a shell and a battery arranged in the shell. The shell usually includes a top shell and a bottom shell that are connected. A storage space for accommodating the battery is formed between the top shell and the bottom shell. The battery is accommodated in the storage space and is usually connected to the top shell through a battery mounting member. However, this will cause the top shell to be subjected to a large force from the battery, which can easily cause damage to the top shell, thereby affecting the use of the shell.

[0191] Based on this, an embodiment of the present application provides an energy storage device capable of increasing the service life of a housing. Specifically, as shown in Figures 1 to 35, the energy storage device 100 provided in the embodiment of the present application includes a housing 1, a clamping member 2, and a battery 3. The housing 1 includes a top shell 11, an intermediate shell 12, and a bottom shell 13. The intermediate shell 12 is located between the top shell 11 and the bottom shell 13, and the intermediate shell 12 is connected to the top shell 11 and the bottom shell 13 respectively. The clamping member 2 is disposed within the bottom shell 13 and is connected to the intermediate shell 12. The clamping member 2 has a clamping space 23, and the battery 3 is disposed in the clamping space 23.

[0192] By designing the outer shell 1 as a shell structure including a top shell 11, an intermediate shell 12 and a bottom shell 13, and adding a clamping member 2 for clamping the battery 3, the clamping member 2 can not only be used to clamp the battery 3 to reduce the expansion of the battery 3, but also the battery 3 can be connected to the intermediate shell 12 through the clamping member 2. Compared with the method in which the outer shell 1 includes a top shell 11 and a bottom shell 13, an additional intermediate shell 12 connected to the top shell 11 is added, and the clamping member 2 and the bottom shell 13 and other components are respectively connected to the intermediate shell 12, so that the intermediate shell 12 can be used to bear part of the force of the top shell, that is, the intermediate shell 12 can be used to share part of the force from the clamping member 2, the battery 3, the bottom shell 13 and other components, thereby avoiding all weight being applied to the top shell 11 and causing damage to the top shell 11, increasing the structural strength of the top shell 11, and thereby improving the bearing capacity of the top shell 11 when lifting the energy storage device 100, thereby improving the service life of the top shell 11 and the service life of the outer shell 1.

[0193] The specific description of the top shell 11, the middle shell 12, the bottom shell 13, the clamping member 2, and the battery 3 in this embodiment can be found in the description of the first embodiment, and will not be repeated here. In addition, the energy storage device 100 also includes an adjustment member 4, a strap 5, a mainboard mounting member 6, a circuit mainboard 7, heat dissipation fins 7a, a thermal insulation member 8, a sealing member 9a, and an electrical connector 9b. The specific description of the clamping member 2, the battery 3, the adjustment member 4, the strap 5, the mainboard mounting member 6, the circuit mainboard 7, the heat dissipation fins 7a, the thermal insulation member 8, the gripping member 9, the sealing member 9a, and the electrical connector 9b in this embodiment can be found in the description of the first embodiment, and will not be repeated here.

[0194] Example 4

[0195] Energy storage devices in related art typically include a housing and a battery disposed within the housing. The housing typically comprises a top shell and a bottom shell connected to each other, with a storage space for the battery formed between the top and bottom shells. However, the seal between the top and bottom shells is poor, allowing external liquids to easily enter the housing through the connection, thereby affecting the performance of the battery within the housing.

[0196] Based on this, this embodiment provides a housing assembly with high waterproof performance. Specifically, as shown in Figures 1 to 35, the housing assembly 100a includes a top shell 11 and a bottom shell assembly. The outer peripheral surface of the bottom shell assembly is provided with a stop protrusion 121. The stop protrusion 121 is arranged along the circumference of the bottom shell assembly and has a first stop surface 1211 facing the top surface of the top shell 11. The bottom shell assembly is embedded in the top shell 11, and the first stop surface 1211 abuts the end surface of the top shell 11. The bottom shell assembly includes an intermediate shell 12 and a bottom shell 13.

[0197] Among them, it can be understood that the state when the bottom surface of the bottom shell assembly is in contact with the placement plane can be understood as the state of the shell assembly 100a being placed on the placement plane (the shell assembly 100a shown in Figure 19 is in the state of being placed on the placement plane), and the state when the top surface of the top shell 11 is in contact with the placement plane can be understood as the state of the shell assembly 100a being placed upside down on the placement plane (the shell assembly 100a shown in Figure 23 is in the state of being placed upside down on the placement plane). Normally, when the outer shell component 100a is placed on a placement plane, the outer shell component 100a is placed directly on the placement plane, that is, the bottom surface of the bottom shell component is in contact with the placement plane, that is, the bottom surface of the bottom shell component is in contact with the placement plane, so the liquid on the outer shell component 100a generally flows from top to bottom. For example, on rainy days, when rain falls down and drips onto the outer shell, the rainwater located in the top shell 11 usually flows from top to bottom under the action of gravity. Even if the rainwater flows into the gap between the top shell 11 and the first stop surface 1211, since the bottom shell component is embedded in the top shell 11, the part of the bottom shell component located in the top shell 11 is equivalent to forming an upward barrier. Under the action of gravity, the rainwater cannot go up along the part of the bottom shell component embedded in the top shell 11, thereby realizing a waterproof design. It can be seen that by providing a stop protrusion 121 on the outer peripheral surface of the bottom shell assembly and embedding the bottom shell assembly in the top shell 11, the first stop surface 1211 of the stop protrusion 121 abuts against the end surface of the top shell 11, thereby realizing the waterproof design of the outer shell 1, thereby improving the waterproof performance of the outer shell assembly 100a and reducing the probability of external liquid entering the outer shell and causing a short circuit to the battery.

[0198] Among them, for the specific description of the components such as the top shell 11, the middle shell 12 and the bottom shell 13 in this embodiment, please refer to the description of them in the first embodiment, and will not be repeated here.

[0199] In addition, the present application also provides an energy storage device having a housing assembly as described above, and the energy storage device 100 also includes a clamping member 2, a battery 3, an adjusting member 4, a strap 5, a mainboard mounting member 6, a circuit mainboard 7, a heat dissipation fin 7a, a thermal insulation member 8, a sealing member 9a and an electrical connector 9b. For the specific description of the clamping member 2, the battery 3, the adjusting member 4, the strap 5, the mainboard mounting member 6, the circuit mainboard 7, the heat dissipation fin 7a, the thermal insulation member 8, the gripping member 9, the sealing member 9a and the electrical connector 9b in this embodiment, please refer to the description thereof in Example 1, and no further details will be given here.

[0200] Example 5

[0201] After research, the inventor found that the handles in the related art are all protruding from the top surface of the shell, which makes it impossible for the shell to be inverted, that is, the top surface of the shell cannot be placed flat on the placement surface; even if the related art can achieve the inversion of the shell by setting a groove on the top surface of the shell and making the handle rotatable in the groove, specifically, when it is necessary to lift the shell, the handle needs to be rotated out of the groove to be grasped, so that the shell can be lifted by grasping the handle, and when it is not necessary to lift the shell, the handle can be rotated to be located in the groove, at which time it can be inverted, but the rotation design of the handle, after multiple rotations, the shaft and the shaft hole are severely worn, affecting use.

[0202] Based on this, the present application provides a shell assembly that can be inverted. Specifically, as shown in Figures 1 to 35, the shell assembly 100a includes a shell 1 and a grip 9. The grip 9 is connected to the shell 1 so that when moving the energy storage device 100, the grip 9 can be grasped to lift the energy storage device 100 to move the energy storage device 100, thereby making it more convenient to move the energy storage device 100. In addition, the top surface of the housing 1 is provided with a first groove 112, and the grip 9 is at least partially accommodated in the first groove 112, and a gripping space for the user's hand to extend into to grip the grip 9 is formed between the grip 9 and the first groove 112. In the direction opposite to the depth direction of the first groove 112, the surface of the grip 9 facing away from the housing 1 is lower than the top surface of the housing 1 or flush with the top surface of the housing 1, so that when the housing 1 is placed on a placement plane such as a desktop, a table, or the ground, the housing 1 can be inverted, that is, the top surface of the top shell 11 can be placed on the placement plane, so that the energy storage device 100 can be inverted on the placement plane. It can be seen from this that the present application can realize the inverted design of the housing 1 without designing a rotating grip 9, and can solve the problem of severe wear of the shaft and the shaft hole after multiple rotations, thereby resulting in a low service life of the grip 9, and the overall structure of the housing assembly 100a is relatively simple and the cost is low.

[0203] Among them, for the specific description of the components such as the housing 1 and the grip 9 in this embodiment, please refer to the description of the embodiment 1, and no further details will be given here.

[0204] In addition, the present application also provides an energy storage device having a housing assembly as described above, and the energy storage device 100 also includes a clamping member 2, a battery 3, an adjusting member 4, a strap 5, a mainboard mounting member 6, a circuit mainboard 7, a heat dissipation fin 7a, a thermal insulation member 8, a sealing member 9a and an electrical connector 9b. For the specific description of the clamping member 2, the battery 3, the adjusting member 4, the strap 5, the mainboard mounting member 6, the circuit mainboard 7, the heat dissipation fin 7a, the thermal insulation member 8, the sealing member 9a and the electrical connector 9b in this embodiment, please refer to the description of the embodiment 1, and will not be repeated here.

[0205] Example 6

[0206] Embodiment 6 of the present application discloses an energy storage system, comprising an energy storage device as described in any one of Embodiments 1 to 5. It is understood that an energy storage system comprising the aforementioned energy storage device can provide the same or similar beneficial effects as the energy storage device. For details, please refer to the description of the embodiment of the energy storage device, and will not be repeated here.

[0207] In practical applications, the energy storage system may be a portable energy storage system, which can be conveniently moved to a target location according to the actual application location.

[0208] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0209] In addition, the above-described embodiments only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all fall within the scope of protection of the present application. Therefore, the content of this specification should not be understood as limiting the present application, and the scope of protection of the present application should be based on the appended claims.

Claims

1. An energy storage device, characterized in that, The energy storage device includes: A housing; A clamping member disposed within the housing, the clamping member including a first clamping component and a second clamping component, the first clamping component and the second clamping component being connected to each other, and a clamping space being formed between the first clamping component and the second clamping component; A battery disposed within the clamping space; and An adjusting member located within the housing, the first clamping component and the second clamping component being connected by the adjusting member, and the adjusting member being configured to adjust the size of the clamping space to adjust the clamping degree of the first clamping component and the second clamping component on the battery.

2. The energy storage device according to claim 1, wherein The first clamping component includes a first clamping body and a first flange connected to the first clamping body, the second clamping component includes a second clamping body and a second flange connected to the second clamping body, the first flange and the second flange being connected by the adjusting member to achieve connection between the first clamping body and the second clamping body, wherein the clamping space is formed between the first clamping body and the second clamping body, and both the first flange and the second flange are located outside the clamping space; The adjusting member includes a first through groove and a first bending member, the first through groove being provided on the first flange, the first bending member being provided on the second flange, the first bending member passing through the first through groove, the first bending member having a bent portion protruding from a surface of the first flange facing away from the second flange, and a length by which the bent portion protrudes relative to the first flange being variable, and the bent portion being capable of being bent to abut against the first flange; and / or, The adjusting member is a threaded member configured to change a distance between the first flange and the second flange upon rotation.

3. The energy storage device according to claim 2, wherein When the adjusting member is a threaded member: The first flange is provided with a first connection hole, the second flange is provided with a threaded hole, the adjusting member includes a screw rod and a head having a diameter larger than that of the screw rod, the screw rod passing through the first connection hole and the threaded hole, and one end of the screw rod being threadedly connected to the threaded hole, and the head being connected to the other end of the screw rod and abutting against a surface of the first flange facing away from the second flange; or, The first flange is provided with a first connection hole, the second flange is provided with a second connection hole, the adjusting member includes a threaded component and a nut, the threaded component including a screw rod and a head having a diameter larger than that of the screw rod, the screw rod passing through the first connection hole and the second connection hole, the head being connected to one end of the screw rod and abutting against a surface of the first flange facing away from the second flange, and the nut being threadedly sleeved on an outer periphery of the other end of the screw rod and abutting against a surface of the second flange facing away from the first flange.

4. The energy storage device according to claim 2, wherein The first clamping component further includes a first reinforcing rib respectively connected to the first flange and the first clamping body; and / or, The second clamping member further includes a second reinforcing rib, and the first reinforcing rib is respectively connected to the second flange and the second clamping body.

5. The energy storage device according to claim 2, wherein The first flange is further provided with a first avoidance hole, and the second flange is further provided with a second avoidance hole. The circumferential edge of the second avoidance hole coincides with the circumferential edge of the first avoidance hole in the projection on the first flange. The energy storage device further includes a strap, and the strap is sleeved on the peripheries of the first clamping body and the second clamping body, and the strap passes through the first avoidance hole and the second avoidance hole. Wherein, the first clamping body has a connection surface for connecting with the first flange, and the first avoidance hole has a hole wall surface coplanar with the connection surface, so that when the strap passes through the first avoidance hole and the second avoidance hole, the strap can be respectively in contact with the connection surface and the hole wall surface.

6. The energy storage device according to claim 5, wherein, When the adjusting member includes a first through groove and a first bending member, the first avoidance hole is located between the first through groove and the first clamping body, and at least a part of the projections of the first avoidance hole and the first through groove on the first clamping body coincide.

7. The energy storage device according to claim 1, characterized in that, The energy storage device further includes a strap, and the strap is sleeved on the peripheries of the first clamping member and the second clamping member.

8. The energy storage device according to claim 7, characterized in that, The outer side surface of the first clamping member and / or the second clamping member is convexly provided with a plurality of first protrusions arranged at intervals, and any two adjacent first protrusions are respectively located on two opposite sides of the strap.

9. The energy storage device according to claim 1, characterized in that, The inner side surface of the first clamping member and / or the second clamping member is convexly provided with a second protrusion, and the second protrusion abuts against the battery, and the second protrusion can be deformed when stressed.

10. The energy storage device according to claim 1, wherein The materials of the first clamping member and the second clamping member are both metal.

11. The energy storage device according to claim 1, wherein, The inner side wall of the housing is convexly provided with a first side rib, and the first side rib abuts against the first clamping member and / or the second clamping member.

12. The energy storage device according to claim 11, wherein, The first side rib is provided with a first guiding surface, and the first guiding surface is used for guiding the clamping member to be installed at a predetermined position in the housing.

13. The energy storage device according to claim 11, characterized in that, There are a plurality of the first side ribs, and the plurality of first side ribs are arranged at intervals along the circumferential direction of the housing. The inner side wall of the housing includes a first side wall and a second side wall. The first side wall faces the side surface of the battery, and the second side wall faces the large surface of the battery. The second side wall is convexly provided with a stop plate, and the stop plate is connected to at least one of the first side ribs provided on the first side wall, and the stop plate is spaced from the first side wall, and the stop plate abuts against the first clamping member and / or the second clamping member.

14. The energy storage device according to claim 1, wherein There is one battery, and the energy of the energy storage device is greater than or equal to 1 KWH.

15. The energy storage device according to claim 1, characterized in that, There is one battery, and the energy storage device further includes a main board mounting member and a circuit main board arranged in the housing. The main board mounting member is connected to the first clamping member, and the main board mounting member is located on one side of the battery. The circuit main board is mounted on the main board mounting member, and there is a spacing between the circuit main board and the first clamping member. The circuit main board is electrically connected to the battery.

16. The energy storage device according to claim 15, wherein, The motherboard mounting member is a housing structure with a cavity, and the circuit motherboard is mounted in the cavity of the motherboard mounting member.

17. The energy storage device according to claim 16, wherein, A stud protrudes from the middle of the first clamping member. The circuit motherboard is provided with a first through hole, and the stud passes through the first through hole to be connected to the motherboard mounting member.

18. The energy storage device according to claim 17, characterized in that, The motherboard mounting member is provided with a sleeve structure located in the cavity, and the stud is inserted into the hollow part of the sleeve structure.

19. The energy storage device according to claim 16, characterized in that, The edge of the motherboard mounting member is provided with a first step structure, which extends along the periphery of the motherboard mounting member. The first step structure sleeves the outer periphery of the first clamping member, and the first step structure abuts against the top of the battery.

20. The energy storage device according to claim 16, wherein The edge of the motherboard mounting member is provided with a card slot. The surface of the first clamping member facing the motherboard mounting member is provided with a rib, which extends in the direction facing the motherboard mounting member, and the rib is inserted into the card slot.

21. The energy storage device according to claim 16, characterized in that, The outer surface of the motherboard mounting member is provided with a wiring groove, and the wiring groove is provided with partition protrusions to divide the wiring groove into a plurality of sub-wiring grooves, and the plurality of sub-wiring grooves are used to separate the wire bundles electrically connected to the circuit motherboard.

22. The energy storage device according to claim 16, characterized in that, The inner side wall of the outer shell protrudes with second side ribs, and the second side ribs abut against the motherboard mounting member. The inner bottom wall of the outer shell protrudes with bottom ribs. A partition is provided between the bottom ribs and the second side ribs, and the partition is connected to the inner bottom wall of the outer shell and abuts against the motherboard mounting member.

23. The energy storage device according to claim 16, characterized in that, The motherboard mounting member is provided with a first ventilation port and a heat dissipation hole that are communicated with each other. The outer shell is provided with a second ventilation port, and the second ventilation port is respectively communicated with the first ventilation port and the heat dissipation hole; The circuit motherboard is provided with a fan and electronic components. The fan forms a heat convection through the first ventilation port, the heat dissipation hole and the second ventilation port to dissipate heat from the electronic components.

24. The energy storage device according to claim 23, characterized in that, The first ventilation port is arranged adjacent to the top of the battery. The heat dissipation hole includes a first sub-heat dissipation hole arranged adjacent to the bottom of the battery, and the fan is arranged adjacent to the top of the battery; There is a first gap between the motherboard mounting member and the inner side wall of the outer shell, and the first gap is communicated with the second ventilation port. There is a second gap between the motherboard mounting member and the inner bottom wall of the outer shell, and the second gap is respectively communicated with the first gap and the first sub-heat dissipation hole; The inner side wall of the outer shell protrudes with second side ribs located in the first gap, and the second side ribs abut against the motherboard mounting member. The inner bottom wall of the outer shell protrudes with bottom ribs. A partition is provided between the bottom ribs and the second side ribs, and the partition is connected to the inner bottom wall of the outer shell and abuts against the motherboard mounting member. There is a third gap between the partition and the inner side wall of the outer shell, and at least one end of the bottom rib is spaced from the inner side wall of the outer shell.

25. The energy storage device according to claim 24, wherein The partition includes a first side surface facing away from the inner bottom wall and an inclined surface connected to the first side surface. In the direction from the first side surface to the inner bottom wall, the inclined surface is gradually inclined towards the bottom rib from the connection with the first side surface.

26. The energy storage device according to claim 23, characterized in that, The electronic component includes a first functional device with a temperature higher than or equal to 110 °C in the operating state. The air outlet of the fan is arranged facing the first functional device. The energy storage device further includes a heat dissipation fin, which is arranged on the side of the first functional device facing away from the first clamping member, and the heat dissipation fin extends along the axial direction of the fan.

27. The energy storage device according to claim 23, wherein, The heat dissipation hole includes a second sub-heat dissipation hole, and the projection of the circumferential edge of the second sub-heat dissipation hole on the inner side wall of the housing is a first projection ring; The electronic component includes a first functional device with a temperature higher than or equal to 110 °C in the operating state. The projection of the first functional device on the inner side wall of the housing is a first projection, and at least part of the first projection is located within the first projection ring.

28. The energy storage device according to claim 23, wherein A waterproof and breathable film is provided at the second ventilation port.

29. The energy storage device according to claim 15, characterized in that, The energy storage device further includes a heat insulation member, which is arranged between the circuit main board and the first clamping member.

30. The energy storage device according to claim 29, wherein, A second through groove is provided at the periphery of the heat insulation member. The first clamping member protrudes with a second bending member, and the second bending member passes through the second through groove, and the second bending member can be bent to abut against the heat insulation member.

31. The energy storage device according to claim 1, wherein, A first groove is provided on the top surface of the housing. The energy storage device further includes a holding member, which is connected to the housing. The holding member is at least partially received in the first groove, and a holding space is formed between the holding member and the first groove for a user's hand to reach in and hold the holding member. In the direction opposite to the depth direction of the first groove, the surface of the holding member facing away from the housing is lower than or flush with the top surface of the housing.

32. The energy storage device according to claim 31, characterized in that, The surface of the holding member facing away from the housing is a flat surface.

33. The energy storage device according to claim 31, characterized in that, A circular protrusion protrudes from the top surface of the housing, and the circular protrusion surrounds the outer periphery of the first groove. In the protruding direction of the circular protrusion, the surface of the holding member facing away from the housing is lower than the surface of the circular protrusion facing away from the housing.

34. The energy storage device according to claim 31, wherein, The two ends of the holding member in the first direction are respectively connected to the housing. The first groove is an arc-shaped groove extending in the first direction, and the first groove has a groove wall surface facing the holding member. The groove wall surface is a cylindrical surface surrounding an axis parallel to the first direction, and the cross-sectional profile of the groove wall surface intercepted by a plane perpendicular to the first direction is an arc.

35. The energy storage device according to claim 34, wherein The holding member has a circumferential side surface facing the groove wall surface. The circumferential side surface is a cylindrical surface surrounding an axis parallel to the first direction, and the circumferential side surface is parallel to the groove wall surface.

36. The energy storage device according to claim 35, wherein, The surface of the holding member facing the groove wall surface is provided with a plurality of first ribs and a plurality of second ribs. The plurality of first ribs are arranged at intervals in the first direction, the plurality of second ribs are arranged at intervals in the second direction, and each second rib intersects with the plurality of first ribs. The second direction is perpendicular to the first direction; Wherein, the surface of the plurality of first ribs facing the groove wall surface forms the circumferential side surface, and / or, the surface of the plurality of second ribs facing the groove wall surface forms the circumferential side surface.

37. The energy storage device according to claim 31, wherein Both ends of the holding member in the first direction are respectively connected to the housing. A power plug is provided on a side wall of the housing arranged in the first direction. A second projection of the holding member on the side wall of the housing arranged in the first direction is such that the second projection at least partially coincides with the power plug in the depth direction of the first groove.

38. The energy storage device according to claim 37, wherein The power plug is located at the top of the housing, and / or, in the depth direction of the first groove, the distance between the power plug and the top surface of the housing is d1, the distance between the top surface and the bottom surface of the housing is d2, and d1 / d2 = 1 / 25 - 4 / 25.

39. The energy storage device according to claim 31, wherein A ring-shaped protrusion and a second functional device protrude from the top surface of the housing. The ring-shaped protrusion surrounds the outer periphery of the first groove. The second functional device is located in the ring-shaped protrusion, and in the protruding direction of the ring-shaped protrusion, the surface of the second functional device facing away from the housing is lower than the surface of the ring-shaped protrusion facing away from the housing.

40. The energy storage device according to claim 1, characterized in that, A ring-shaped protrusion protrudes from the top surface of the housing, and a limiting protrusion protrudes from the bottom surface of the housing. A second projection ring is the projection of the ring-shaped protrusion on the bottom surface of the housing, and a third projection is the projection of the limiting protrusion on the bottom surface of the housing. The third projection is located within the second projection ring, and the outer contour of the third projection abuts against the inner contour of the second projection ring.

41. The energy storage device according to claim 1, wherein The housing includes a top shell and a bottom shell. The top shell and the bottom shell are connected. The first clamping member and the second clamping member are provided inside the bottom shell, and the first clamping member and the second clamping member are respectively connected to the top shell. The adjusting member is located inside the bottom shell.

42. The energy storage device according to claim 1, characterized in that, The housing includes a top shell, an intermediate shell, and a bottom shell. The intermediate shell is located between the top shell and the bottom shell, and the intermediate shell is respectively connected to the top shell and the bottom shell. The first clamping member and the second clamping member are provided inside the bottom shell, and the first clamping member and the second clamping member are respectively connected to the intermediate shell. The adjusting member is located inside the bottom shell.

43. The energy storage device according to claim 42, wherein An abutting protrusion protrudes from the outer peripheral surface of the intermediate shell. The abutting protrusion is arranged to surround the intermediate shell in the circumferential direction, and the abutting protrusion has a first abutting surface facing the top surface of the top shell. The intermediate shell is embedded in the top shell, the abutting protrusion is located outside the top shell, and the first abutting surface abuts against the end surface of the top shell; In a direction perpendicular to the first abutting surface, the length of the part of the intermediate shell embedded in the top shell is 0.3 cm - 1.5 cm.

44. The energy storage device according to claim 42, wherein An abutting protrusion protrudes from the outer peripheral surface of the intermediate shell. The abutting protrusion is arranged to surround the intermediate shell in the circumferential direction. The bottom shell is embedded in the abutting protrusion and / or inside the intermediate shell.

45. The energy storage device according to claim 42, characterized in that, The outer peripheral surface of the intermediate housing is convexly provided with a stopping projection, the stopping projection is arranged in a circumferential direction around the intermediate housing, and the stopping projection has a second stopping surface facing the bottom surface of the bottom housing. The intermediate housing is embedded in the bottom housing, the stopping projection is located outside the bottom housing, and the second stopping surface abuts against the end surface of the bottom housing; The energy storage device further includes a seal, the seal is arranged on the outer peripheral surface of the intermediate housing and is arranged in a circumferential direction around the intermediate housing, and the seal is in sealing abutment with the inner side wall of the bottom housing.

46. The energy storage device according to claim 45, wherein One end of the intermediate housing embedded in the bottom housing is provided with a second stepped structure, the second stepped structure includes a first stepped surface and a second stepped surface connected at an angle, the orientation of the first stepped surface is the same as that of the second stopping surface, the orientation of the second stepped surface is the same as that of the outer peripheral surface of the intermediate housing, and the second stepped surface is convexly provided with a plurality of clamping projections arranged at intervals in the circumferential direction of the intermediate housing. A plurality of the clamping projections are all arranged at intervals from the first stepped surface, and the seal is embedded between the first stepped surface and the clamping projections.

47. The energy storage device according to claim 42, wherein, One end of the intermediate housing is embedded in the top housing, and the other end of the intermediate housing is embedded in the bottom housing. The outer peripheral surface of the intermediate housing is convexly provided with a stopping projection, the stopping projection is arranged in a circumferential direction around the intermediate housing, and the stopping projection is located between the top housing and the bottom housing. In the protruding direction of the stopping projection, the outer peripheral surfaces of the top housing and the bottom housing are flush, and the outer peripheral surface of the intermediate housing is lower than the outer peripheral surface of the top housing.

48. The energy storage device according to claim 42, wherein The battery is provided with an explosion-proof valve, the side wall of the top housing is provided with a second ventilation port, a waterproof and breathable film is provided at the second ventilation port, the intermediate housing is provided with a ventilation hole communicated with the second ventilation port, and the ventilation hole is used for discharging the gas discharged through the explosion-proof valve to the second ventilation port when the explosion-proof valve explodes.

49. The energy storage device according to claim 42, wherein, The energy storage device further includes a circuit main board arranged in the bottom housing, the circuit main board is located on one side of the battery, the intermediate housing is provided with an installation through groove for installing a fan, the circumferential edge of the installation through groove projects onto the inner bottom wall of the bottom housing as a third projection ring, and the circuit main board projects onto the inner bottom wall of the bottom housing as a fourth projection, and a part of the fourth projection is located within the third projection ring.

50. The energy storage device according to claim 42, characterized in that, The energy storage device further includes a circuit main board and an electrical connector, the circuit main board is arranged in the bottom housing and is located on one side of the battery, the electrical connector is electrically connected to the battery and the circuit main board respectively, and the intermediate housing is provided with an avoidance groove for avoiding the electrical connector.

51. A energy storage system, characterized in that, The energy storage system has the energy storage device according to any one of claims 1-50.

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