Energy storage device and energy storage device control system having the same

Abstract

The application discloses an energy storage device and an energy storage device control system with the same, and belongs to the technical field of energy storage devices. The energy storage device comprises the following parts: two sides of a box body in the left-right direction are provided with openings; a first end cover assembly and a second end cover assembly are respectively arranged on the two sides of the box body and are detachably connected with the box body, the first end cover assembly and the second end cover assembly and the box body jointly define a receiving cavity, a battery management system is arranged in the box body and extends along the left-right direction; a battery module is arranged in the receiving cavity, the battery module and the battery management system are arranged along the up-down direction, the battery module comprises a module shell and a plurality of cell groups, at least two cell groups are arranged along the up-down direction, a plurality of cells are arranged side by side along the front-rear direction, each cell extends along the left-right direction, and the battery module and the battery management system can be moved out of the receiving cavity through the openings. According to the energy storage device, the energy storage device can be installed on a wall or placed on the ground, and the applicability of the energy storage device is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to an energy storage device and an energy storage device control system having the same. Background Technology

[0002] Energy storage devices can store electrical energy and release it to the devices that need it when electricity is required.

[0003] In related technologies, most energy storage devices are designed as a single unit. When a malfunction occurs, this makes repair difficult and increases maintenance costs. Furthermore, when placed on the ground, energy storage devices occupy a large space and have low utilization of the upper space, resulting in large vertical dimensions. This makes wall mounting difficult, limiting the applicability of the devices and failing to fully meet users' installation needs. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide an energy storage device that can be mounted on a wall or placed on the ground, improving the applicability of the energy storage device and thus enabling it to better meet the installation needs of users.

[0005] Another object of the present invention is to provide an energy storage device control system employing the above-described energy storage device.

[0006] According to a first aspect of the present invention, an energy storage device includes: a housing having openings on both sides in a left-right direction; a first end cap assembly and a second end cap assembly, the first end cap assembly and the second end cap assembly being respectively disposed on the two sides of the housing and detachably connected to the housing, the first end cap assembly and the second end cap assembly being used to close the openings, the first end cap assembly and the second end cap assembly together with the housing defining a receiving cavity; a battery management system disposed within the receiving cavity, the battery management system extending in a left-right direction; and a battery module disposed within the receiving cavity, the battery module and the battery management system being arranged in a vertical direction, the battery module including a module housing and a plurality of cell groups, the plurality of cell groups being disposed within the module housing, at least two of the cell groups being arranged in the vertical direction, each cell group including a plurality of cells, the plurality of cells being arranged side-by-side in a front-back direction, each cell extending in a left-right direction; wherein the battery module and the battery management system are capable of being removed from the receiving cavity through the openings.

[0007] According to an embodiment of the present invention, the energy storage device comprises a first end cap assembly and a second end cap assembly respectively disposed on the left and right sides of a housing and detachably connected to the housing. The battery management system extends in the left-right direction, the battery module and the battery management system are arranged in the up-down direction, and at least two of the multiple cell groups in the battery module are arranged in the up-down direction. Multiple cells in each cell group are arranged side-by-side in the front-back direction, and each cell extends in the left-right direction. Therefore, compared with traditional energy storage devices, this device facilitates maintenance, reduces maintenance costs, and allows for miniaturization and thinning. The horizontal dimension of the energy storage device is larger, while the vertical dimension is smaller, allowing it to be mounted on a wall or placed on the ground, improving its applicability and better meeting user installation needs.

[0008] According to some embodiments of the present invention, both the first end cap assembly and the second end cap assembly are sealed to the housing.

[0009] According to some embodiments of the present invention, the first end cap assembly includes a first inner end cap, which is detachably disposed at the opening and closes the opening. The first inner end cap is provided with a switch, which communicates with the battery management system and is used to control the power-on and power-off of the energy storage device. The first end cap assembly also includes a first outer end cap, which is detachably connected to the first inner end cap and together with the first inner end cap defines a first space. The switch is disposed within the first space.

[0010] According to some embodiments of the present invention, the second end cap assembly includes a connector, at least one of the power line and communication line of the battery management system assembly and the battery module being electrically connected to the connector, the connector being used for electrical connection to an external cable.

[0011] According to some embodiments of the present invention, the second end cap assembly includes a second inner end cap, which is detachably connected to the housing and the wiring component is provided on the second inner end cap. The second end cap assembly also includes a second outer end cap, which is detachably connected to the second inner end cap and defines a second space with the second inner end cap. The wiring component is disposed in the second space.

[0012] According to some embodiments of the present invention, the surface area of ​​the surface of the housing along the left-right direction is smaller than the surface area of ​​the surface in the other directions.

[0013] According to some embodiments of the present invention, the housing includes a plurality of side walls, and the connection between two adjacent side walls is provided with a chamfer or rounded corner.

[0014] According to some embodiments of the present invention, at least one first separator is provided between two adjacent battery cells, and the two adjacent battery cells are separated by the first separator, wherein the width of the first separator is smaller than the width of the battery cell.

[0015] According to some embodiments of the present invention, the thickness of the first separator is w, wherein w satisfies: 0.1mm ≤ w ≤ 1mm.

[0016] According to some embodiments of the present invention, a plurality of first separators are provided between two adjacent cells, the plurality of first separators are spaced apart along the vertical direction, and each first separator extends along the horizontal direction.

[0017] According to some embodiments of the present invention, the outermost cell in the cell assembly is a first cell, and at least one second separator is provided between the first cell and the inner wall of the housing. The first cell and the inner wall of the housing are separated by the second separator, and the width of the second separator is smaller than the width of the cell.

[0018] According to some embodiments of the present invention, a first insulating element is provided between two adjacent battery cell groups.

[0019] According to some embodiments of the present invention, at least one second insulating member is provided between the outer surface of the battery module and the inner wall of the housing, and the outer surface of the battery module is separated from the inner wall of the housing by the second insulating member.

[0020] According to some embodiments of the present invention, the module housing includes: two first side plates, the two first side plates being spaced apart from each other and located on the front and rear sides of the battery module; two second side plates, the two second side plates being spaced apart from each other and located on the upper and lower sides of the battery module, the two second side plates and the two first side plates together defining a receiving cavity for accommodating a plurality of the battery cell groups; and a second insulating member disposed between the outer surface of the battery module and the first side plates and / or the second side plates.

[0021] According to some embodiments of the present invention, there are multiple second insulating members, including: multiple first sub-insulating members, at least one of which is disposed on the first side plate and the surface of the battery module opposite to the first side plate; and multiple second sub-insulating members, at least one of which is disposed on the second side plate and the surface of the battery module opposite to the second side plate.

[0022] According to some embodiments of the present invention, a receiving cavity is defined within the housing, and at least one connecting piece is connected between the side of the battery module adjacent to the opening and the housing.

[0023] According to some embodiments of the present invention, the connecting piece includes a first side and a second side in the vertical direction of the housing, the first side being connected to the side of the battery module adjacent to the opening, the second side being connected to the housing, and the length of the first side in the vertical direction of the housing being greater than the length of the second side in the vertical direction of the housing.

[0024] According to some embodiments of the present invention, a plurality of first connection holes are formed on the first side, and the plurality of first connection holes are spaced apart along the vertical direction of the housing; the energy storage device further includes: a plurality of first fasteners, the plurality of first fasteners passing through the plurality of first connection holes respectively to connect the connecting piece to the battery module.

[0025] According to some embodiments of the present invention, a plurality of second connecting holes are formed on the second side, and the plurality of second connecting holes are spaced apart along the vertical direction of the housing; a plurality of connecting structures are provided on the inner wall of the receiving cavity, and the plurality of connecting structures are spaced apart along the vertical direction of the housing; the energy storage device further includes: a plurality of second fasteners, the plurality of second fasteners passing through the plurality of second connecting holes and connected to the plurality of connecting structures respectively.

[0026] According to some embodiments of the present invention, a plurality of second connection holes are respectively located at both ends of the second side in the vertical direction of the housing.

[0027] According to some embodiments of the present invention, the plurality of first connecting holes include a first sub-connecting hole and a second sub-connecting hole, the first sub-connecting hole and the second sub-connecting hole being located at both ends of the first side in the vertical direction of the housing; the plurality of second connecting holes include a third sub-connecting hole and a fourth sub-connecting hole, the third sub-connecting hole and the fourth sub-connecting hole being located at both ends of the second side in the vertical direction of the housing, the third sub-connecting hole and the first sub-connecting hole being located at one end of the length direction of the connecting piece, and the fourth sub-connecting hole and the second sub-connecting hole being located at the other end of the length direction of the connecting piece; the distance between the third sub-connecting hole and the first sub-connecting hole is greater than the distance between the fourth sub-connecting hole and the second sub-connecting hole.

[0028] According to some embodiments of the present invention, the distance between the third sub-connecting hole and the fourth sub-connecting hole is greater than the distance between the first sub-connecting hole and the second sub-connecting hole.

[0029] According to some embodiments of the present invention, the line connecting the center of the first sub-connecting hole and the center of the third sub-connecting hole is the first connecting line, and the line connecting the center of the second sub-connecting hole and the center of the fourth sub-connecting hole is the second connecting line. From the second side toward the first side, the distance between the first connecting line and the second connecting line gradually increases.

[0030] According to some embodiments of the present invention, the battery module and the battery management system are spaced apart from each other, and at least one of the outer surface of the battery module and the inner wall surface of the housing is provided with a plurality of anti-collision structures, and the outer surface of the battery module is spaced apart from the inner wall surface of the housing by the plurality of anti-collision structures.

[0031] According to some embodiments of the present invention, a plurality of anti-collision structures are disposed on the inner wall surface of the housing, the plurality of anti-collision structures are spaced apart along the circumference of the housing, each anti-collision structure extends along the left-right direction of the housing, and each anti-collision structure has a through hole extending along the left-right direction of the housing, the side of the through hole facing the battery module being open.

[0032] According to some embodiments of the present invention, the plurality of anti-collision structures include a plurality of first anti-collision structures, the plurality of first anti-collision structures being disposed adjacent to the battery management system, two adjacent first anti-collision structures being spaced apart along the front-rear direction of the housing to define a first slide groove, and at least a portion of the battery management system being slidably fitted within the first slide groove.

[0033] According to some embodiments of the present invention, the battery management system includes a plate and at least one heat sink. At least one electrical component is provided on one side of the plate adjacent to the battery module. The heat sink is provided on the side of the plate away from the electrical component and is at least opposite to the electrical component. The heat sink is slidably fitted in the first groove.

[0034] According to some embodiments of the present invention, the heat sink includes: a first heat sink portion disposed on the plate body; a second heat sink portion connected to the first heat sink portion, the second heat sink portion being located on the side of the first heat sink portion away from the plate body, the width of the second heat sink portion in the front-rear direction of the housing body being smaller than the width of the first heat sink portion in the front-rear direction of the housing body, and the second heat sink portion being slidably fitted in the first groove.

[0035] According to some embodiments of the present invention, the heat sink is in contact with the inner wall of the housing.

[0036] According to some embodiments of the present invention, the plurality of anti-collision structures include: a plurality of second anti-collision structures, the plurality of second anti-collision structures being respectively disposed on two side walls of the housing in the front-rear direction, each side wall being provided with at least two second anti-collision structures, the at least two second anti-collision structures being spaced apart along the vertical direction of the housing, the plurality of second anti-collision structures being respectively opposite to two side surfaces of the battery module in the front-rear direction of the housing; and a plurality of third anti-collision structures, the plurality of third anti-collision structures being disposed on one side of the housing adjacent to the battery module in the vertical direction, the plurality of third anti-collision structures being spaced apart along the front-rear direction of the housing, the bottom surface of the battery module being supported on the plurality of third anti-collision structures.

[0037] According to some embodiments of the present invention, the energy storage device further includes: at least one connecting piece, the connecting piece including a first side and a second side in the vertical direction of the housing, the first side being connected to a side of the battery module in the front-rear direction of the housing, and the second side being connected to the second anti-collision structure.

[0038] According to some embodiments of the present invention, at least one avoidance notch is formed on the connecting piece for avoiding the second anti-collision structure.

[0039] According to some embodiments of the present invention, each of the battery cells includes a battery cell body and a plurality of terminals, the plurality of terminals being respectively disposed at both ends of the battery cell body; the energy storage device further includes: a plurality of terminal guide plates, the plurality of terminal guide plates corresponding one-to-one with the plurality of battery cell groups, the terminal guide plates being disposed on the battery module, the terminal guide plates being located at one end of the plurality of battery cells, and the terminal guide plates being electrically connected between the terminal at one end of the plurality of battery cells and the housing of the battery cell body of the plurality of battery cells; a battery cell sampling plate, the battery cell sampling plate being disposed at the other end of the plurality of battery cells, the battery cell sampling plate being electrically connected to at least the housing of the battery cell body of the plurality of battery cells.

[0040] According to some embodiments of the present invention, the electrode guide plate includes: a body extending along the arrangement direction of the plurality of battery cells, the body having a first side and a second side in a direction perpendicular to the arrangement direction; a plurality of first connecting tabs spaced apart from each other and connected to the first side, the plurality of first connecting tabs being electrically connected to the electrode post at one end of the plurality of battery cells respectively; and a plurality of second connecting tabs spaced apart from each other and connected to the second side, the plurality of second connecting tabs being electrically connected to the housing of the battery cell body of the plurality of battery cells respectively.

[0041] According to some embodiments of the present invention, the battery module further includes: a data acquisition board, the data acquisition board being disposed on the side of the cell sampling board away from the battery module, the data acquisition board being provided with at least one connector, and the data acquisition board being electrically connected to the cell sampling board through the connector.

[0042] According to some embodiments of the present invention, the battery module further includes: a protective cover, the protective cover being disposed on the side of the acquisition board away from the cell sampling board.

[0043] According to some embodiments of the present invention, the battery management system extends along the left-right direction of the housing, the battery module and the battery management system are arranged along the up-down direction of the housing, and the battery management system is pivotally connected to the end cap assembly about a central axis along the thickness direction of the housing.

[0044] According to some embodiments of the present invention, the battery management system includes: a tray, the tray being pivotally connected to the end cap assembly; and a plate, the plate being disposed on the tray, the plate having the power line and the communication line disposed thereon, the power line and the communication line being located on one side of the plate adjacent to the center of the housing, the power line extending along the left-right direction of the housing.

[0045] According to some embodiments of the present invention, a plurality of guide rails are provided on the bottom wall of the housing, the plurality of guide rails extend along the left-right direction of the housing, and the plurality of guide rails are spaced apart along the front-back direction of the housing; the battery module is slidably disposed in the housing along the left-right direction of the housing, and the bottom surface of the battery module is supported on the plurality of guide rails.

[0046] According to some embodiments of the present invention, each of the guide rails includes: a first connecting segment extending along the vertical direction of the housing, one end of the first connecting segment being connected to the bottom wall of the housing; a second connecting segment extending along the front-rear direction of the housing, the second connecting segment being connected to the other end of the first connecting segment, and the bottom surface of the battery module being supported on the second connecting segment.

[0047] According to some embodiments of the present invention, each of the guide rails further includes: at least one third connecting segment, one end of the third connecting segment being connected to the free end of the second connecting segment, and the other end of the third connecting segment extending obliquely toward the bottom wall of the housing.

[0048] According to some embodiments of the present invention, the sum of the lengths of the second connecting segment and the third connecting segment is less than the length of the first connecting segment.

[0049] According to some embodiments of the present invention, the energy storage device further includes: a plurality of hanging ears, which are respectively disposed at the left and right ends of the housing body, the plurality of hanging ears respectively cooperating with the first end cap assembly and the second end cap assembly, both the first end cap assembly and the second end cap assembly having a receiving space, the plurality of hanging ears being hidden within the receiving space, and the housing being adapted to be connected to a wall via the plurality of hanging ears.

[0050] According to some embodiments of the present invention, each of the end caps is provided with at least one hanging member; each of the hanging ears includes: a first mounting portion adapted to be connected to the wall; a second mounting portion, one end of the second mounting portion being connected to the first mounting portion, the other end of the second mounting portion extending toward the center of the receiving space, and at least one hanging hole being formed on the second mounting portion, wherein the hanging member cooperates with the hanging hole to be adapted to install the body on the wall.

[0051] According to some embodiments of the present invention, the energy storage device further includes: a plurality of handles, the plurality of handles being respectively disposed on the side of the first end cap assembly and the second end cap assembly away from the housing, the handles and the corresponding end cap assemblies being integrally formed.

[0052] According to some embodiments of the present invention, the housing is made of aluminum alloy.

[0053] According to some embodiments of the present invention, the length of the energy storage device is L1, the width of the energy storage device is L2, and the height of the energy storage device is L3. L1, L2, and L3 respectively satisfy: 0mm < L1 ≤ 685mm, 0mm < L2 ≤ 135mm, and 0mm < L3 ≤ 185mm.

[0054] According to a second aspect of the present invention, an energy storage device control system includes: a plurality of energy storage devices connected in parallel, each energy storage device including a battery management system, the energy storage device being an energy storage device according to the first aspect of the present invention described above; and a battery management unit communicatively connected to each of the battery management systems in the plurality of energy storage devices.

[0055] According to some embodiments of the present invention, each of the energy storage devices further includes a battery information collector, which is communicatively connected to the battery management system.

[0056] According to some embodiments of the present invention, the energy storage device control system further includes: a power management system or an inverter, wherein the power management system or inverter is communicatively connected to the battery management unit.

[0057] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0058] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0059] Figure 1 This is a schematic diagram of an energy storage device according to an embodiment of the present invention;

[0060] Figure 2 yes Figure 1 An exploded view of the energy storage device shown;

[0061] Figure 3 This is a side view of an energy storage device according to an embodiment of the present invention, wherein the end cap is not shown;

[0062] Figure 4 This is a side view of an energy storage device according to an embodiment of the present invention, wherein the decorative cover is not shown;

[0063] Figure 5 This is a schematic diagram of the housing, battery module, and battery management system of an energy storage device according to an embodiment of the present invention;

[0064] Figure 6 This is a schematic diagram of the battery management system of an energy storage device according to an embodiment of the present invention;

[0065] Figure 7 yes Figure 6 A side view of the battery management system of the energy storage device shown;

[0066] Figure 8 This is a schematic diagram of the battery management system and end cap of an energy storage device according to an embodiment of the present invention;

[0067] Figure 9 yes Figure 8 Enlarged view of part A shown in the center circle;

[0068] Figure 10 yes Figure 8 Enlarged view of section B shown in the center circle;

[0069] Figure 11 This is a schematic diagram of the first end cap assembly of an energy storage device according to an embodiment of the present invention;

[0070] Figure 12 This is a schematic diagram of the second end cap assembly of an energy storage device according to an embodiment of the present invention;

[0071] Figure 13 This is a schematic diagram of the lug of an energy storage device according to an embodiment of the present invention;

[0072] Figure 14 This is an exploded view of the battery module of the energy storage device according to an embodiment of the present invention;

[0073] Figure 15 yes Figure 14 A side view of the battery module of the energy storage device shown;

[0074] Figure 16 This is a schematic diagram of the connecting piece of an energy storage device according to an embodiment of the present invention;

[0075] Figure 17 This is a schematic diagram of the heat sink of an energy storage device according to an embodiment of the present invention;

[0076] Figure 18 This is a schematic diagram of the housing of an energy storage device according to an embodiment of the present invention;

[0077] Figure 19 This is a schematic diagram of an energy storage device installed on a wall according to an embodiment of the present invention;

[0078] Figure 20 This is a schematic diagram of an energy storage device control system according to an embodiment of the present invention;

[0079] Figure 21 This is a circuit diagram of an energy storage device control system according to an embodiment of the present invention.

[0080] Figure label:

[0081] 100: Energy storage device;

[0082] 1: Box body; 11: Opening; 111: Connecting structure; 112: Anti-collision structure; 1121: First anti-collision structure;

[0083] 1122: First slide rail; 113: Second anti-collision structure; 114: Third anti-collision structure; 115: Guide rail;

[0084] 1151: First connecting segment; 1152: Second connecting segment; 1153: Third connecting segment; 12: First end cap assembly; 121: First inner end cap; 1211: Suspension component; 122: First outer end cap; 13: Second end cap assembly;

[0085] 131: Second inner end cap; 132: Second outer end cap; 133: Wiring component; 2: Battery management system; 21: Board body; 22: Heat sink; 221: First heat sink; 222: Second heat sink; 23: Electrical component; 24: Tray;

[0086] 25: Power line; 26: Communication line; 3: Battery module; 31: Module housing; 311: First side plate;

[0087] 312: Second side plate; 32: Cell assembly; 321: Cell; 322: First cell; 33: First separator;

[0088] 34: Second separator; 35: First insulator; 36: Second insulator; 361: First sub-insulator;

[0089] 362: Second sub-insulator; 37: Connecting piece; 371: First connecting hole; 3711: First sub-connecting hole;

[0090] 3712: Second sub-connecting hole; 372: Second connecting hole; 3721: Third sub-connecting hole;

[0091] 3722: Fourth sub-connection hole; 373: Clearance notch; 38: Pole post guide plate; 381: Body;

[0092] 382: First connecting piece; 383: Second connecting piece; 39: Cell sampling board; 40: Acquisition board;

[0093] 401: Connector; 41: Protective cover; 4: First fastener; 5: Second fastener; 6: Lug;

[0094] 61: First mounting part; 62: Second mounting part; 621: Hanging hole; 7: Handle; 8: Switch;

[0095] 200: Energy storage device control system; 201: Battery management unit; 202: Battery information acquisition unit;

[0096] 203: Power Management System. Detailed Implementation

[0097] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-19 An energy storage device 100 according to an embodiment of the present invention is described.

[0098] like Figures 1-19 As shown, the energy storage device 100 according to an embodiment of the present invention includes a housing 1, a first end cap assembly 12, a second end cap assembly 13, a battery management system 2, and a battery module 3.

[0099] Specifically, the housing 1 has openings 11 on both sides in the left and right directions. A first end cap assembly 12 and a second end cap assembly 13 are respectively located on both sides of the housing 1 and detachably connected to the housing 1. The first end cap assembly 12 and the second end cap assembly 13 are used to close the openings 11, and together with the housing 1, they define a receiving cavity. A battery management system 2 is located within the receiving cavity and extends in the left-right direction. A battery module 3 is located within the receiving cavity, and the battery module 3 and the battery management system 2 are arranged in the vertical direction. The battery module 3 includes a module housing 31 and multiple cell groups 32. The multiple cell groups 32 are located within the module housing 31, with at least two cell groups 32 arranged in the vertical direction. Each cell group 32 includes multiple cells 321, which are arranged side-by-side in the front-back direction, and each cell 321 extends in the left-right direction. The battery module 3 and the battery management system 2 can be removed from the receiving cavity through the openings 11. In the description of this invention, "multiple" means two or more.

[0100] It should be noted that, in combination Figure 2 The left and right directions refer to the length direction of the energy storage device 100, the up and down directions refer to the width direction of the energy storage device 100, and the front and back directions refer to the thickness direction of the energy storage device 100.

[0101] For example, in Figure 1 , Figure 2 , Figure 14 and Figure 15 In the example, the energy storage device 100 is roughly rectangular in shape. The two ends of the housing 1 are open along its length to form openings 11. There are two cell groups 32, arranged vertically. Each cell group 32 includes eight cells 321, arranged horizontally. The battery management system 2 is electrically connected to the battery module 3 and is used to monitor data such as voltage and temperature of the battery module 3. During assembly, the battery management system 2 and battery module 3 can be pushed into the housing 1 through the opening 11 at one end. Then, the first end cap assembly 12 and the second end cap assembly 13 close the opening 11 to prevent external impurities from entering the housing 1, ensuring the cleanliness of the interior. When the energy storage device 100 needs maintenance, the first end cap assembly 12 and the second end cap assembly 13 can be removed from the housing 1, and then the battery management system 2 and battery module 3 can be removed from the housing 1 to replace any damaged components.

[0102] Therefore, compared with the traditional energy storage device 100, by detachably connecting the first end cap assembly 12 and the second end cap assembly to the housing 1, the energy storage device 100 can be easily disassembled during maintenance, thereby improving the maintenance efficiency and reducing maintenance costs. Simultaneously, it increases the utilization rate of the internal space of the housing 1, allowing more battery cells 321 to be arranged within the same space, increasing the energy density of the cell pack 32, and enabling miniaturization and thinning of the energy storage device 100. Since the battery management system 2 and the battery cells 321 extend along the length of the housing 1, the horizontal dimension of the energy storage device 100 is relatively large, while its vertical dimension is relatively small. During installation, the energy storage device 100 occupies less space in the vertical direction, allowing it to be mounted on a wall or placed on the ground, thus improving its applicability.

[0103] According to an embodiment of the present invention, the energy storage device 100 is provided on the left and right sides of the housing 1, respectively, and is detachably connected to the housing 1. The battery management system 2 extends in the left and right direction, the battery module 3 and the battery management system 2 are arranged in the up and down direction, and at least two of the multiple cell groups 32 of the battery module 3 are arranged in the up and down direction. The multiple cells 321 of each cell group 32 are arranged side by side in the front and back direction, and each cell 321 extends in the left and right direction. Therefore, compared with the conventional energy storage device 100, the energy storage device 100 is easier to maintain, which can reduce maintenance costs. At the same time, the energy storage device 100 can be miniaturized and made thinner. The horizontal dimension of the energy storage device 100 is larger, and the vertical dimension of the energy storage device 100 is smaller. Therefore, the energy storage device 100 can be installed on the wall or placed on the ground, which improves the applicability of the energy storage device 100 and better meets the installation needs of users.

[0104] According to some embodiments of the present invention, such as Figure 1 As shown, both the first end cap assembly 12 and the second end cap assembly 13 are sealed to the housing 1. This arrangement enhances the waterproof and dustproof performance of the energy storage device 100. When the first end cap assembly 12 and the second end cap assembly 13 are subjected to impact, they can absorb the force and prevent the force from being transmitted to the battery management system 2 and the battery module 3, thereby enhancing the protection level of the energy storage device 100 to achieve an IP65 protection level.

[0105] Furthermore, referring to Figure 2 and Figure 11The first end cap assembly 12 includes a first inner end cap 121, which is detachably disposed at and closes the opening 11. A switch 8 is provided on the first inner end cap 121. The switch 8 communicates with the battery management system 2 and is used to control the power-on and power-off of the energy storage device 100. Optionally, the switch 8 is a push-button switch, but not limited to this. For example, when the energy storage device 100 is working, the battery management system 2 can detect the button press of the switch 8, thereby controlling the drive circuit (not shown) of the energy storage device 100 to drive the relay (not shown) to close and open, thus realizing the power-on and power-off of the energy storage device 100. With this configuration, only one switch 8 is needed on the housing 1 to realize the opening and closing of the energy storage device 100, simplifying the structure of the energy storage device 100, providing a concise display, simple operation, and user convenience, thereby improving the user experience.

[0106] The first end cap assembly 12 also includes a first outer end cap 122, which is detachably connected to the first inner end cap 121 and together with the first inner end cap 121 defines a first space, within which the switch 8 is disposed. Thus, the first outer end cap 122 can protect the switch 8 from damage, and can also cover components at one end of the housing 1, making the energy storage device 100 more aesthetically pleasing. Optionally, the first outer end cap 122 and the housing 1 can be detachably connected via a snap-fit ​​connection, a threaded connection, or a hinge. However, this is not a limitation.

[0107] According to some embodiments of the present invention, such as Figure 2 and Figure 12 As shown, the second end cap assembly 13 includes a connector 133. At least one of the power line 25 and communication line 26 of the battery management system assembly 2 and the battery module 3 is electrically connected to the connector 133. The connector 133 is used for electrical connection to external cables. The connector 133 can guide the power line 25 and communication line 26 so that the power line 25 and communication line 26 can be electrically connected to external cables through the connector 133.

[0108] Furthermore, the second end cap assembly 13 includes a second inner end cap 131, which is detachably connected to the housing 1. A wiring component 133 is provided on the second inner end cap 131. The second end cap assembly 13 also includes a second outer end cap 132, which is detachably connected to the second inner end cap 131 and defines a second space with the second inner end cap 131. The wiring component 133 is disposed within this second space. This configuration allows the second inner end cap 131 and the second outer end cap 132 to protect the wiring component 133 from damage. Simultaneously, the detachable connection of the second inner end cap 131 and the second outer end cap 132 facilitates the disassembly of the energy storage device 100, enabling maintenance of the energy storage device 100.

[0109] The first inner end cover 121 closes the opening 11 at one end of the housing 1 and is equipped with a switch 8, which communicates with the battery management system 2. The second inner end cover 131 is connected to one end of the battery management system 2 and closes the opening 11 at the other end of the housing 1. The power line 25 and communication line 26 of the battery management system 2 can pass through the second inner end cover 131 and connect to the connector 133. Thus, the first inner end cover 121 and the second inner end cover 131 have different functions. During installation, the first inner end cover 121 and the second inner end cover 131 can be installed in reverse, thereby improving assembly efficiency. By setting the switch 8 and the power line 25 and communication line 26 at both ends of the housing 1, the wiring harness inside the housing 1 can be reduced, allowing the wiring harness of the housing 1 to be arranged neatly, and the cost of the energy storage device 100 can be reduced.

[0110] According to some embodiments of the present invention, such as Figure 1 As shown, the surface area of ​​the surface of the housing 1 along the left-right direction is smaller than the surface area of ​​the surface in other directions. Therefore, the horizontal dimension of the energy storage device 100 is larger, which is beneficial for mounting the energy storage device 100 on a wall.

[0111] According to some embodiments of the present invention, the housing 1 includes a plurality of side walls, and the joint between two adjacent side walls is provided with a chamfer or rounded corner. (Refer to...) Figure 1 The housing 1 includes four side walls, which are connected end to end in sequence, and the connection between two adjacent side walls is chamfered, so that the shape of the housing 1 is diamond-cut, making the appearance of the energy storage device 100 more aesthetically pleasing.

[0112] According to some embodiments of the present invention, at least one first separator 33 is provided between two adjacent battery cells 321, and the two adjacent battery cells 321 are separated by the first separator 33, wherein the width of the first separator 33 is smaller than the width of the battery cell 321. Figure 14 and Figure 15 As shown, there can be one first separator 33, which extends along the length of the cell 321. The first separator 33 allows adjacent cells 321 to be spaced apart, i.e., adjacent cells 321 are separated by the first separator 33. Since the width of the first separator 33 is smaller than the width of the cell 321, the adjacent cells 321 and the first separator 33 can define a heat dissipation channel. The heat dissipation channel can dissipate the heat generated by the energy storage device 100 during use, increasing the heat dissipation rate of the energy storage device 100, thereby maintaining the high performance of the energy storage device 100 and preventing explosions or spontaneous combustion due to untimely heat dissipation, thus improving the safety of the energy storage device 100. Moreover, the heat dissipation channel structure is simple, making it easier to control the cost of the energy storage device 100 and facilitating the miniaturization design of the energy storage device 100.

[0113] Furthermore, the thickness of the first separator 33 is w, where w satisfies: 0.1mm ≤ w ≤ 1mm. For example, W = 0.5mm. An adhesive can be provided on the surface of the first separator 33 to achieve connection with the battery cell 321 through bonding. The thickness of the first separator 33 can be selected according to the size of the battery module 3 and the width of the heat dissipation channel designed to achieve the desired heat dissipation effect. Thus, by limiting the width of the separator, it is possible to ensure that the separator can cooperate with the heat dissipation channel, satisfying heat dissipation while reducing the volume of the battery module 3. This avoids situations where the separator width is too small, resulting in poor heat dissipation effect of the heat dissipation channel, or the separator width is too large, resulting in poor airflow within the heat dissipation channel, reducing heat dissipation capacity, and potentially increasing the volume of the battery module 3, which is detrimental to the miniaturization design of the energy storage device 100.

[0114] According to other embodiments of the present invention, refer to Figure 15 Multiple first separators 33 are provided between two adjacent battery cells 321. These first separators 33 are spaced vertically and extend horizontally. This creates a heat dissipation channel between the multiple first separators 33 and the adjacent battery cells 321. The heat dissipation channel extends along the length of the battery cell 321, allowing the first separators 33 to fully contact the battery cell 321 for better heat dissipation. The number of first separators 33 can be selected according to the needs of the designed energy storage device 100. Therefore, providing multiple first separators 33 between adjacent battery cells 321 facilitates the formation of a heat dissipation channel while increasing physical isolation between the battery cells 321. This prevents short circuits in the energy storage device 100 caused by contact between adjacent battery cells 321, which could affect the normal operation of the battery cell assembly 32 and reduce the working efficiency of the energy storage device 100.

[0115] Optionally, such as Figure 15 As shown, two first separators 33 are provided between two adjacent battery cells 321, and the two first separators 33 are located on both sides of the width direction of the battery cell 321. The surfaces of the two first separators 33 that are far apart from each other are flush with two opposite surfaces in the width direction of the battery cell 321, and the two first separators 33 are spaced apart. The two first separators 33 and the two battery cells 321 can define a heat dissipation channel. Therefore, providing two first separators 33 between two adjacent battery cells 321, and the two first separators 33 being on both sides of the width direction of the battery cell 321, facilitates the formation of a heat dissipation channel, increases the stability of the installation between two adjacent battery cells 321, and is conducive to realizing the thin and light design of the battery module 3.

[0116] According to some embodiments of the present invention, a protective layer is provided on the outer surface of each battery cell 321. On the one hand, the protective layer can protect the battery cell 321, separating the casing of the battery cell 321 from the outside air, preventing the casing of the battery cell 321 from being oxidized or corroded by the outside air, thereby extending the service life of the battery cell 321. On the other hand, the protective layer can act as insulation, preventing short circuits between two adjacent battery cells 321, ensuring the normal operation of the battery cell 321, avoiding leakage of the battery cell 321, and improving the safety of the energy storage device 100. It should be noted that the protective layer provided on the outer surface of the battery cell 321 is generally a protective layer provided on the battery cell 321 itself during production, and this protective layer is only a very thin layer.

[0117] According to some embodiments of the present invention, with reference to Figure 14 and Figure 15 In the battery cell assembly 32, the outermost battery cell 321 is the first battery cell 322. At least one second separator 34 is provided between the first battery cell 322 and the inner wall of the housing 1, separating the first battery cell 322 from the inner wall of the housing 1. The width of the second separator 34 is smaller than the width of the battery cell 321. An adhesive can be provided on the side of the second separator 34 facing the battery cell 321 to enable a reliable connection between the second separator 34 and the first battery cell 322. The separation between the first battery cell 322 and the inner wall of the housing 1 by the second separator 34 defines a heat dissipation channel. Along the thickness direction of the battery cell 321, the heat dissipation channel is located on the side of the first battery cell 322 adjacent to the inner wall of the housing 1. Therefore, by providing a second partition 34 between the first battery cell 322 and the inner wall of the housing 1, and the width of the second partition 34 being smaller than the width of the battery cell 321, the second partition 34 will define a heat dissipation channel with the first battery cell 322 and the inner wall of the housing 1, thereby increasing the heat dissipation effect of the battery cell 321.

[0118] Optionally, refer to Figure 14 and Figure 15 Multiple second separators 34 are provided, spaced apart along the width direction of the battery cell 321, and each second separator 34 extends along the length direction of the battery cell 321. For example, there may be two second separators 34, distributed along the width direction of the battery cell 321 on one side of the first battery cell 322 adjacent to the inner wall of the housing 1, and the length of the second separator 34 in the length direction of the battery cell 321 is equal to the length of the battery cell 321. Therefore, providing multiple second separators 34 increases the stability of the connection between the first battery cell 322 and the inner wall of the housing 1, ensures the reliability of the defined heat dissipation channel structure, and increases the heat dissipation of the first battery cell 322.

[0119] According to some embodiments of the present invention, the width of the second separator 34 in the width direction of the cell 321 is H1, and the width of the cell 321 is H2, wherein H1 and H2 satisfy: H1 / H2≤1 / 5. When H1 / H2>1 / 5, the width of the second separator 34 in the width direction of the cell 321 is large, which reduces the contact area between the cell 321 and the air, thereby affecting the heat dissipation efficiency of the cell 321. Therefore, by ensuring that H1 and H2 satisfy: H1 / H2≤1 / 5, while ensuring that two adjacent cells 321 are mutually insulated, the contact area between the cell 321 and the air can be guaranteed, thereby improving the heat dissipation efficiency of the cell 321.

[0120] According to some embodiments of the present invention, such as Figure 15 As shown, a first insulating member 35 is provided between two adjacent battery cell groups 32. The first insulating member 35 can extend along the length direction of the battery cell 321, and the first insulating member 35 can cover the opposing surfaces between the two battery cell groups 32, so that the two adjacent battery cell groups 32 are completely separated. Thus, the first insulating member 35 provided between the two adjacent battery cell groups 32 can form a separation between the two battery cell groups 32, avoid mutual interference between the two battery cell groups 32, increase the insulation between the battery cell groups 32, and help increase the heat dissipation of the battery cell groups 32, so as to reduce the impact of high temperature on the performance of the energy storage device 100.

[0121] According to some embodiments of the present invention, with reference to Figure 15 At least one second insulating member 36 is provided between the outer surface of the battery module 3 and the inner wall of the housing 1. The second insulating member 36 can extend along the length direction of the battery cell 321, and the outer surface of the battery module 3 is separated from the inner wall of the housing 1 by the second insulating member 36. Therefore, the provision of the second insulating member 36 between the outer surface of the battery module 3 and the inner wall of the housing 1 can facilitate the heat dissipation of the two battery cell groups 32 and accelerate the heat dissipation rate. At the same time, the second insulating member 36 can also separate the battery module 3 from the housing 1, which has a good insulation effect, prevents the housing 1 from being electrified and affecting the user's use, and increases the safety of the energy storage device 100.

[0122] Furthermore, such as Figure 14 and Figure 15As shown, the module housing 31 includes two first side plates 311 and two second side plates 312. The two first side plates 311 are spaced apart from each other and are located on the front and rear sides of the battery module 3. The two second side plates 312 are spaced apart from each other and are located on the upper and lower sides of the battery module 3. The two second side plates 312 and the two first side plates 311 together define a storage cavity for accommodating multiple battery cell groups 32. The first side plates 311 can be flat plates with a first through hole at their edges. The second side plates 312 have folded edges with second through holes. When the two first side plates 311 and the two second side plates 312 are connected in sequence, the two first side plates 311 face each other, the two second side plates 312 face each other, and the first and second through holes face each other for fastener fixation. Alternatively, the folded edges of the first side plate 311 and the second side plate 312 are opposite in the thickness direction of the cell 321, and can be bonded together with adhesive. The cavity structure defined by the first side plate 311 and the second side plate 312 is stable.

[0123] The second insulating member 36 is disposed between the outer surface of the battery module 3 and the first side plate 311 and / or the second side plate 312. In other words, the second insulating member 36 can be disposed between the battery module 3 and the first side plate 311 to separate the first side plate 311 from the battery module 3; or, the second insulating member 36 can be disposed between the battery module 3 and the second side plate 312 to separate the second side plate 312 from the battery module 3; or, the second insulating member 36 can be disposed simultaneously between the first side plate 311 and the second side plate 312 and the battery module 3, that is, the second insulating member 36 forms a cover over the battery module 3 on the outer surface of the battery module 3.

[0124] Therefore, the module housing 31 includes two first side plates 311 and two second side plates 312 connected in sequence. The second insulating member 36 is disposed between the first side plates 311 and the second side plates 312 and the battery module 3 to form protection for the battery module 3, increase the insulation and heat dissipation of the battery module 3, so that the energy storage device 100 has good safety.

[0125] Furthermore, combined Figure 14 and Figure 15There are multiple second insulating elements 36, including multiple first sub-insulating elements 361 and multiple second sub-insulating elements 362. Here, there are four second insulating elements 36. Among them, two second insulating elements 36 facing each other along the width direction of the cell 321 are second sub-insulating elements 362, and two second insulating elements 36 facing each other along the thickness direction of the cell 321 are first sub-insulating elements 361. The number of first sub-insulating elements 361 and second sub-insulating elements 362 is two. At least one first sub-insulating element 361 is provided on the surface of the first side plate 311 and the battery module 3 opposite to the first side plate 311. At least one second sub-insulating element 362 is provided on the surface of the second side plate 312 and the battery module 3 opposite to the second side plate 312. That is, the first sub-insulator 361 and the second sub-insulator 362 can be respectively connected to the inner wall of the first side plate 311 and the second side plate 312 adjacent to the housing 1. The first sub-insulator 361 and the second sub-insulator 362 can be connected to the corresponding first side plate 311 and the second side plate 312 by means of adhesive bonding or screw connection. Thus, there are multiple second insulators 36, which can effectively dissipate heat from the battery cells 321 in the battery cell assembly 32, ensuring the performance of the energy storage device 100. At the same time, it prevents the battery module 3 from contacting the housing 1, reducing the possibility of the housing 1 becoming charged. The first sub-insulator 361 and the second sub-insulator 362 can be provided on the surface of the first side plate 311 and the second side plate 312 facing the battery cell assembly 32.

[0126] According to some embodiments of the present invention, the thickness of the second insulating member 36 in the thickness direction of the cell 321 is t1, wherein t1 satisfies: 0.1mm ≤ t1 ≤ 1mm. When t1 < 0.1mm, the thickness of the second insulating member 36 in the thickness direction of the cell 321 is small, and the breakdown voltage of the second insulating member 36 is small. When the cell 321 leaks current, the current may break down the second insulating member 36, thereby causing leakage in the cell 321. When t1 > 1mm, the thickness of the second insulating member 36 in the thickness direction of the cell 321 is large. Although the breakdown voltage of the second insulating member 36 is large, it increases the thickness of the cell assembly 32, which is not conducive to the miniaturization design of the battery module 3. Therefore, when t1 satisfies 0.1mm ≤ t1 ≤ 1mm, the second insulating member 36 can be prevented from being broken down and causing leakage, and the miniaturization design of the cell 321 module can be utilized.

[0127] The first separator 33, the second separator 34, the first insulator 35, and the second insulator 36 are insulating and heat dissipation components, respectively. Thus, the first separator 33 and the second separator 34 define a heat dissipation channel with the battery cell 321, increasing heat dissipation within the battery cell assembly 32. On the other hand, the first separator 33, the second separator 34, the first insulator 35, and the second insulator 36 have an insulating function, so that there is insulation between two adjacent battery cells 321, between two adjacent battery cell assemblies 32, and between the battery cell assembly 32 and the inner wall of the housing 1.

[0128] In some embodiments, the energy storage device 100 further includes a first fan and a second fan (not shown). The first fan is disposed inside the housing 1, and the second fan is disposed inside the housing 1, with the first and second fans located at opposite ends of the heat dissipation channel. For example, the first fan can blow air into the battery cell assembly 32, increasing the airflow velocity inside the energy storage device 100 and increasing heat dissipation. The second fan can draw air from the battery cell assembly 32, increasing the airflow velocity from inside the energy storage device 100, which can also accelerate heat dissipation from the internal battery cells 321. Alternatively, the first and second fans can be staggered along the length of the battery cells 321, allowing both the first and second fans to perform both blowing and drawing air, thus improving the heat dissipation capacity of the battery cells 321. Therefore, by placing the first and second fans at both ends of the heat dissipation channel, the airflow velocity in the heat dissipation channel can be increased, facilitating the rapid removal of heat from the battery cells 321 and increasing the heat dissipation capacity of the energy storage device 100, thereby ensuring that the energy storage device 100 maintains good performance.

[0129] According to some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, at least one connecting piece 37 connects the side of the battery module 3 adjacent to the opening 11 to the housing 1. In other words, the connecting piece 37 is located between the battery module 3 and the housing 1, with one side of the connecting piece 37 connected to the end of the battery module 3 along its length and the other side connected to the inner wall of the housing 1 along its thickness. This arrangement facilitates fixing the battery module 3 to the housing 1, increasing the stability of the battery module 3. The connecting piece 37 has a simple structure, which reduces the use of consumables and lowers the production cost of the connecting piece 37. Furthermore, since the connecting piece 37 is connected to the side of the housing 1, it facilitates the deformation and replacement of the connecting piece 37, increasing the convenience of connecting the connecting piece 37 and the safety when replacing the connecting piece 37.

[0130] Furthermore, such as Figure 16As shown, the connecting piece 37 includes a first side and a second side in the vertical direction of the housing 1. The first side is connected to the side of the battery module 3 adjacent to the opening 11, and the second side is connected to the housing 1. The length of the first side in the vertical direction of the housing 1 is greater than the length of the second side in the vertical direction of the housing 1. The lengths of the first and second sides are not specifically limited here. In actual use, they can be designed according to the specific positions of the housing 1 and the battery module 3 to be connected, so that the connecting piece 37 can better connect the housing 1 and the battery module 3. Therefore, the length of the first side is greater than the length of the second side, which facilitates the connection between the connecting piece 37 and the side of the battery module 3, increases the connection area between the first side and the battery module 3, reduces the stress transmission on the first side, and improves the stability of the connection between the battery module 3 and the housing 1.

[0131] In some embodiments, refer to Figure 3 and Figure 16 The first side has a plurality of first connecting holes 371, which are spaced apart along the vertical direction of the housing 1. Taking two first connecting holes 371 as an example, the two first connecting holes 371 are positioned near both ends of the connecting piece 37 along the width direction of the housing 1. The energy storage device 100 further includes a plurality of first fasteners 4, which pass through the plurality of first connecting holes 371 to connect the connecting piece 37 to the battery module 3. Therefore, by providing first connecting holes 371 on the first side, the first connecting holes 371 can cooperate with the first fasteners 4 to connect the connecting piece 37 to the side of the battery module 3. The connection method is simple, easy to disassemble, helps reduce maintenance costs, and has high installation efficiency.

[0132] Furthermore, referring to Figure 3 , Figure 16 and Figure 18 The second side has multiple second connecting holes 372, which are spaced apart along the vertical direction of the housing 1. Multiple connecting structures 111 are provided on the inner wall of the receiving cavity. These connecting structures 111 can be formed by protruding from one side of the inner wall of the housing 1 towards the center of the housing 1, or they can be directly welded to the inner wall of the housing 1. The multiple connecting structures 111 are spaced apart along the vertical direction of the housing 1. The energy storage device 100 further includes multiple second fasteners 5, which pass through the multiple second connecting holes 372 and are connected to the multiple connecting structures 111. Thus, the second fasteners 5 pass through the second connecting holes 372 and the connecting structures 111 to connect the second side to the housing 1. The connecting structures 111 on the housing 1 facilitate the fixing of the second fasteners 5 and also increase the resistance to the connecting piece 37 along the length of the housing 1, increasing the reliability of the connection between the connecting piece 37 and the housing 1.

[0133] Furthermore, such as Figure 16 As shown, multiple second connecting holes 372 are located at both ends of the housing 1 in the vertical direction on the second side. Therefore, the multiple second connecting holes 372 located at both ends of the second side along the width direction of the housing 1 facilitate stress distribution throughout the second side. This indicates that the spacing between the two second connecting holes 372 is small, reducing the risk of breakage due to excessive local stress on the connecting piece 37 and increasing the reliability of the connection between the connecting piece 37 and the housing 1.

[0134] According to some specific embodiments of the present invention, such as Figure 16 As shown, the plurality of first connecting holes 371 include a first sub-connecting hole 3711 and a second sub-connecting hole 3712, which are located at opposite ends of the housing 1 on the first side in the vertical direction. The plurality of second connecting holes 372 include a third sub-connecting hole 3721 and a fourth sub-connecting hole 3722, which are located at opposite ends of the housing 1 on the second side in the vertical direction. The third sub-connecting hole 3721 and the first sub-connecting hole 3711 are located at one end of the connecting piece 37 in the length direction, while the fourth sub-connecting hole 3722 and the second sub-connecting hole 3712 are located at the other end of the connecting piece 37 in the length direction. The distance between the third sub-connecting hole 3721 and the first sub-connecting hole 3711 is greater than the distance between the fourth sub-connecting hole 3722 and the second sub-connecting hole 3712. The first sub-connecting hole 3711 and the third sub-connecting hole 3721 are located above the second sub-connecting hole 3712 and the fourth sub-connecting hole 3722.

[0135] It is understandable that the first and second sides of the connecting piece 37 are connected to the side of the battery module 3 and the housing 1, respectively. When the energy storage device 100 is subjected to external force, the housing 1 and the internal battery module 3 will vibrate. Force will be transmitted between the two sides of the connecting piece 37 through the spiral fastener. When the torque is constant, the larger the distance between the first sub-connecting hole 3711 and the opposite third sub-connecting hole 3721, and the larger the distance between the second sub-connecting hole 3712 and the fourth sub-connecting hole 3722 on the connecting piece 37, the smaller the force transmitted between the housing 1 and the battery module 3. Due to the limitation of the installation position of the connecting piece 37 on the battery module 3, the distance between the first sub-connecting hole 3711 and the third sub-connecting hole 3721 is greater than the distance between the second sub-connecting hole 3712 and the fourth sub-connecting hole 3722, so as to increase the space utilization of the side of the battery module 3.

[0136] In practical applications, where space allows at the connection between the battery module 3 and the housing 1, the distance between the first sub-connecting hole 3711 and the third sub-connecting hole 3721 can be equal to the distance between the second sub-connecting hole 3712 and the fourth sub-connecting hole 3722. Therefore, the distance between the third sub-connector and the first sub-connector is greater than the distance between the fourth sub-connector and the second sub-connector. This fully utilizes the structure of the connecting piece 37, improving the stability of the battery module 3 installation while reducing the stress on the connecting piece 37, increasing its service life, and preventing torsional deformation of the connecting piece 37 from reducing the stability of the battery module 3 installation.

[0137] Furthermore, such as Figure 16 As shown, the distance between the third sub-connecting hole 3721 and the fourth sub-connecting hole 3722 is greater than the distance between the first sub-connecting hole 3711 and the second sub-connecting hole 3712. Since the battery module 3 has a large mass, when the energy storage device 100 is subjected to force, the force is often transmitted from the battery module 3 to the housing 1. To ensure higher stability of the battery module 3 relative to the housing 1, the distance between the third sub-connecting hole 3721 and the fourth sub-connecting hole 3722 is made smaller than the distance between the first sub-connecting hole 3711 and the second sub-connecting hole 3712 along the thickness direction of the housing 1, from the first side to the second side of the connecting piece 37. This reduces the force transmission between the battery module 3 and the housing 1 through the connecting piece 37, increasing the stability of the battery module 3 relative to the housing 1.

[0138] For example, the line connecting the center of the first sub-connecting hole 3711 and the center of the third sub-connecting hole 3721 is the first connecting line, and the line connecting the center of the second sub-connecting hole 3712 and the center of the fourth sub-connecting hole 3722 is the second connecting line. From the second side towards the first side, the distance between the first connecting line and the second connecting line gradually increases. Thus, the first sub-connecting hole 3711, the second sub-connecting hole 3712, the third sub-connecting hole 3721, and the fourth sub-connecting hole 3722 are respectively engaged by spiral fasteners, and the distance between the first connecting line and the second connecting line gradually increases, so that the first connecting line and the second connecting line are approximately triangularly fixed, which can increase the stability of the connecting piece 37 connecting the battery module 3 and the housing 1.

[0139] According to some embodiments of the present invention, with reference to Figure 3 and Figure 18The battery module 3 and the battery management system 2 are spaced apart from each other. At least one of the outer surface of the battery module 3 and the inner wall of the housing 1 is provided with multiple anti-collision structures 112. The outer surface of the battery module 3 is separated from the inner wall of the housing 1 by the multiple anti-collision structures 112. In other words, the anti-collision structures 112 can be provided on the outer surface of the battery module 3 or on the inner wall of the housing 1. Taking the anti-collision structure 112 being provided on the inner wall of the housing 1 as an example, the anti-collision structure 112 separates the battery module 3 from the inner wall of the housing 1, so that the battery module 3 does not directly contact the inner wall of the housing 1.

[0140] Therefore, the protection of the battery module 3 by the box 1 can be increased. When the box 1 is subjected to external force and collision occurs, the anti-collision structure 112 can increase the structural strength of the box 1. Furthermore, since the anti-collision structure 112 is set so that the box 1 has room for deformation when it undergoes a certain deformation, it can prevent the deformed part of the box 1 from hitting the battery module 3 and causing damage to the battery module 3. This increases the protection of the battery module 3 inside the box 1 and reduces losses caused by collisions during transportation.

[0141] Furthermore, such as Figure 18 As shown, multiple anti-collision structures 112 are disposed on the inner wall surface of the housing 1. These structures are spaced apart circumferentially along the housing 1, and each extends laterally along the housing 1. Thus, the multiple anti-collision structures 112, spaced apart on the inner wall surface of the housing 1 and extending along the length of the housing 1, increase the contact area between the anti-collision structures 112 and the housing 1, thereby increasing the structural strength of the multiple inner walls of the housing 1. This allows the anti-collision structures 112 to protect the internal battery module 3 from multiple directions, increasing the service life of the battery module 3.

[0142] Combination Figure 18 Each anti-collision structure 112 has a through-hole extending along the left-right direction of the housing 1. The through-hole can be closed along the circumference of the housing 1, open along the length of the housing 1, or open on the side facing the battery module 3. For example, if the through-hole is open on the side facing the battery module 3, the cross-sectional shape of the through-hole can be C-shaped. Thus, by opening the through-hole on the side facing the battery module 3, the through-hole can undergo a certain deformation when it is engaged with the fastener, increasing the stability of the connection. At the same time, it can reduce the amount of material used and reduce the weight of the energy storage device 100.

[0143] According to some embodiments of the present invention, refer to, as shown in, 3 and Figure 18The plurality of anti-collision structures 112 include a plurality of first anti-collision structures 1121, which are disposed adjacent to the battery management system 2. Two adjacent first anti-collision structures 1121 are spaced apart along the front-rear direction of the housing 1 to define a first sliding groove 1122. At least a portion of the battery management system 2 is slidably fitted within the first sliding groove 1122. The battery management system 2 can be installed into the housing 1 at its end along the length direction of the housing 1. Thus, the first sliding groove 1122 is defined by two adjacent first anti-collision structures 1121. The first sliding groove 1122 can cooperate with a portion of the battery management system 2 to install the battery management system 2 to the housing 1. The first sliding groove 1122 has good guiding properties, increasing the installation accuracy of the battery management system 2 and the battery module 3, and ensuring high installation reliability.

[0144] Furthermore, referring to Figure 18 and combined Figure 6 and Figure 7 The battery management system 2 includes a plate 21 and at least one heat sink 22. At least one electrical component 23 is provided on the side of the plate 21 adjacent to the battery module 3. The heat sink 22 is located on the side of the plate 21 opposite to the electrical component 23, and is at least opposite to the electrical component 23. The heat sink 22 is slidably fitted within a first groove 1122. It is understood that, along the width direction of the housing 1, the heat sink 22 and the electrical component 23 are respectively located on both sides of the plate 21. The heat sink 22 is connected to the upper surface of the plate 21, and the cross-sectional shape of the heat sink 22 is adapted to the cross-sectional shape of the first groove 1122, so that the plate 21 can be connected to the housing 1 via the heat sink 22. The battery management system 2 may include circuit boards and electrical components 23 such as detection elements, which can be used to detect and control the switching 8 of the energy storage device 100 and for detection during operation. Thus, the plate 21, through the heat sink 22 and the first slide groove 1122, enables the installation of the battery management system 2 and the housing 1. The installation method has good reliability, and the heat sink 22 has high heat dissipation capacity, which can transfer the temperature generated during the operation of the energy storage device 100 to the housing 1, thereby increasing the heat dissipation capacity of the battery management system 2.

[0145] Furthermore, such as Figure 17As shown, the heat sink 22 includes a first heat dissipation section 221 and a second heat dissipation section 222. The first heat dissipation section 221 is disposed on the plate body 21. The second heat dissipation section 222 is connected to the first heat dissipation section 221 and is located on the side of the first heat dissipation section 221 away from the plate body 21. The width of the second heat dissipation section 222 in the front-rear direction of the housing 1 is smaller than the width of the first heat dissipation section 221 in the front-rear direction of the housing 1. The second heat dissipation section 222 is slidably fitted within the first sliding groove 1122. In other words, the heat sink 22 includes a second heat dissipation section 222 connected to the housing 1 and a first heat dissipation section 221 connected to the plate body 21. The width of the second heat dissipation section 222 is smaller than the width of the first heat dissipation section 221 to facilitate the fit between the second heat dissipation section 222 and the first sliding groove 1122. Therefore, the width of the second heat dissipation part 222 is smaller than the width of the first heat dissipation part 221, which allows the second heat dissipation part 222 to cooperate with the first sliding groove 1122. At the same time, it increases the connection area between the heat dissipation plate 22 and the plate body 21, and increases the reliability of the connection between the heat dissipation plate 22 and the plate body 21, so that the battery management system 2 can be installed more stably in the housing 1.

[0146] In some embodiments, refer to Figure 17 The cross-sectional area of ​​the first heat dissipation part 221 is larger than that of the second heat dissipation part 222. Along the length of the heat dissipation plate 22, the cross-sectional shape of the heat dissipation plate 22 is approximately an isosceles trapezoid. During installation, the larger first heat dissipation part 221 is in contact with the plate body 21. This increases the contact area between the heat dissipation plate 22 and the plate body 21, allowing for rapid heat transfer from electrical components to the heat dissipation plate 22, improving heat dissipation efficiency. Furthermore, the heat dissipation plate 22 has a simple structure, reducing manufacturing costs.

[0147] In some embodiments, such as Figure 3 As shown, the heat sink 22 is in contact with the inner wall of the housing 1. When the electrical components generate heat during operation, the components can transfer the heat to the heat sink 22 via the plate 21. The heat sink 22 can then exchange heat with other components, such as the housing 1, to dissipate heat from the electrical components. This arrangement, by placing the heat sink 22 in contact with the inner wall of the housing 1, improves the heat transfer efficiency between the heat sink 22 and the housing 1, thereby enhancing the overall heat dissipation efficiency.

[0148] In some embodiments, such as Figure 18As shown, the plurality of anti-collision structures 112 include a plurality of second anti-collision structures 113 and a plurality of third anti-collision structures 114. The plurality of second anti-collision structures 113 are respectively disposed on two side walls in the front-rear direction of the housing 1, and each side wall is provided with at least two second anti-collision structures 113. The at least two second anti-collision structures 113 are spaced apart along the vertical direction of the housing 1. The plurality of second anti-collision structures 113 are respectively opposite to two sides of the battery module 3 along the thickness direction of the housing 1. The plurality of third anti-collision structures 114 are disposed on one side of the housing 1 adjacent to the battery module 3 in the width direction. The plurality of third anti-collision structures 114 are spaced apart along the front-rear direction of the housing 1. The bottom surface of the battery module 3 is supported on the plurality of third anti-collision structures 114.

[0149] Therefore, the anti-collision structure 112 includes multiple second anti-collision structures 113 and multiple third anti-collision structures 114. The multiple second anti-collision structures 113 are located on the sidewall of the housing 1 facing the battery module 3 in the width direction, and the multiple third anti-collision structures 114 are located on the bottom of the housing 1 facing the battery module 3. The multiple third anti-collision structures 114 can support the battery module 3, creating a gap between the battery module 3 and the housing 1, while reducing the contact area between the battery module 3 and the housing 1, thus facilitating the installation of the battery module 3. The multiple second anti-collision structures 113 located on the sidewall of the housing 1 can increase the restraint of the battery module 3 within the housing 1, thereby improving the stability of the battery module 3 during installation.

[0150] Furthermore, referring to Figure 3 and Figure 16 The energy storage device 100 further includes at least one connecting piece 37. The connecting piece 37 includes a first side and a second side in the vertical direction of the housing 1. The first side is connected to the side of the battery module 3 in the front-rear direction of the housing 1, and the second side is connected to the second anti-collision structure 113. The connecting piece 37 is a flat piece structure. The first side and the second side of the connecting piece 37 are provided with at least two through holes. The through hole on the first side is used for fasteners to pass through and connect the connecting piece 37 to the battery module 3. The through hole on the second side is used for fasteners to pass through and connect the connecting piece 37 to the second anti-collision structure 113 on the side wall of the housing 1. The connecting piece 37 connects the battery module 3 and the housing 1 at the end of the battery module 3. It should be noted that the end face of the second anti-collision structure 113 connected to the second side of the connecting piece 37 can be lower than the end face of other adjacent second anti-collision structures 113 to increase the utilization rate of the internal space of the housing 1. Therefore, by setting the connecting piece 37 to connect the battery module 3 to the housing 1, the stability of the installation of the battery module 3 and the housing 1 is increased. The connecting piece 37 has a simple structure, which can reduce the use of consumables and reduce the production cost of the energy storage device 100. Moreover, since the connecting piece 37 is connected to the side of the housing 1, it is convenient to deform and replace the connecting piece 37, which increases the convenience and safety of the connection of the connecting piece 37.

[0151] Furthermore, such as Figure 16 As shown, at least one clearance notch 373 is formed on the connecting piece 37 to avoid the second anti-collision structure 113. There can be two clearance notches 373, and both clearance notches 373 can be located on the second side. Therefore, by providing clearance notches 373 on the connecting piece 37, when the connecting piece 37 connects the battery module 3 to the housing 1, other structures of the energy storage device 100 can be smoothly connected to the end of the battery module 3, avoiding interference from the second anti-collision structure 113 on the installation of the connecting piece 37, increasing the utilization rate of the space at the end of the battery module 3, and improving the internal structural compactness of the energy storage device 100.

[0152] Optionally, the clearance notch 373 is formed by a portion of the edge of the connecting piece 37 recessed towards the center of the battery module 3. That is, from the second side of the connecting piece 37 towards the first side, the edge of the second side is recessed to form the clearance notch 373. Thus, the clearance notch 373 formed on the connecting piece 37 can avoid the anti-collision structure 112 provided on the side of the housing 1, which facilitates the thinning design of the energy storage device 100 along the length of the housing 1. In some embodiments, the corners of the connecting piece 37 are rounded along the circumference of the connecting piece 37. Thus, the rounded corners of the connecting piece 37 can reduce the resistance encountered by the connecting piece 37 when the battery module 3 and the housing 1 move relative to each other in the thickness direction of the housing 1.

[0153] According to some embodiments of the present invention, such as Figure 2 As shown, each battery cell 321 includes a cell body, multiple terminals, and a cell sampling plate 39. The multiple terminals are respectively disposed at both ends of the cell body. The energy storage device 100 further includes multiple terminal guide plates 38, each corresponding to one of the multiple cell groups 32. The terminal guide plates 38 are disposed on the battery module 3, located at one end of the multiple cells 321, and electrically connected between the terminal at the aforementioned end of the multiple cells 321 and the housing of the cell body of the multiple cells 321. The cell sampling plate 39 is disposed at the other end of the multiple cells 321, and the cell sampling plate 39 is electrically connected to at least the housing of the cell body of the multiple cells 321.

[0154] For example, in Figure 2In the example, each battery module 3 includes two cell groups 32 and two terminal guide plates 38. The two terminal guide plates 38 are located at one end of the length direction of the cell 321 and are arranged along the width direction of the cell group 32. Multiple cells 321 of each cell group 32 can be connected in series through the terminal guide plates 38. Since the terminal guide plates 38 are connected between the terminal of the cell 321 and the housing of the cell body, the housing and the terminal at the above-mentioned end are at the same potential. The cell sampling plate 39 located at the other end of the cell 321 can collect the potential of the cell 321 at the above-mentioned end through the housing. When the cell sampling plate 39 is connected to the other end of the cell 321, the voltage of the cell 321 can be collected. Therefore, compared with the traditional battery module 3, the battery module 3 of the energy storage device 100 of this application can collect information such as voltage and temperature of the battery cell 321 by setting a single cell sampling board 39, thereby reducing the wiring harness setup, making the structure of the battery module 3 more regular, and reducing the cost of the battery module 3, thereby reducing the cost of the energy storage device 100.

[0155] Further, the electrode guide plate 38 includes a body 381, a plurality of first connecting pieces 382, ​​and a plurality of second connecting pieces 383. The body 381 extends along the arrangement direction of the plurality of cells 321. The body 381 has a first side and a second side in a direction perpendicular to the arrangement direction. The plurality of first connecting pieces 382 are connected to the first side at intervals from each other, and the plurality of first connecting pieces 382 are electrically connected to the electrode post at one end of the plurality of cells 321, respectively. The plurality of second connecting pieces 383 are connected to the second side at intervals from each other, and the plurality of second connecting pieces 383 are electrically connected to the housing of the cell body of the plurality of cells 321, respectively. (Refer to...) Figure 2 There can be four first connecting pieces 382 and four second connecting pieces 383. The four first connecting pieces 382 are evenly arranged along the first side of the body 381, and the four second connecting pieces 383 are evenly arranged along the second side of the body 381, with the first connecting pieces 382 and the second connecting pieces 383 facing each other along the width direction of the body 381. During installation, each first connecting piece 382 is welded to the terminal post at one end of the corresponding cell 321, and each second connecting piece 383 is welded to the casing of the cell body. This makes the potential of the casing of the cell body the same as the potential of the aforementioned end of the cell 321, so that the potential at both ends of the cell 321 can be collected by a single cell sampling plate 39, reducing the number of cell sampling plates 39 in the battery module 3.

[0156] Furthermore, the battery module 3 further includes a data acquisition board 40, which is located on the side of the cell sampling board 39 away from the battery module 3. The data acquisition board 40 has at least one connector 401, and is electrically connected to the cell sampling board 39 via the connector 401. For example, as... Figure 2As shown, a connector 401 is provided on one side of the acquisition board 40 adjacent to the cell sampling board 39. The cell sampling board 39 may have an electrical connection plug. During installation, the electrical connection plug mates with the connector 401 to achieve electrical connection between the acquisition board 40 and the cell sampling board 39. The cell sampling board 39 transmits voltage, temperature, and other information collected from the cell 321 to the acquisition board 40. The acquisition board 40 then transmits the received information to the battery management system 2. The battery management system 2 analyzes the received information to control the cell 321, ensuring its normal operation.

[0157] In some alternative embodiments, refer to Figure 2 The battery module 3 further includes a protective cover 41, which covers the side of the acquisition board 40 away from the cell sampling board 39. The protective cover 41 protects the acquisition board 40 from damage during installation and transportation. At the same time, the protective cover 41 can seal one end of the battery module 3 to prevent foreign objects from entering the cell assembly 32 and causing damage to the cell 321.

[0158] According to some embodiments of the present invention, with reference to Figure 6 , Figure 9 and Figure 10 The battery management system 2 includes a tray 24 and a plate 21. The tray 24 is pivotally connected to the end cap assembly 12. Since no other components are installed on the tray 24, pivotally connecting the tray 24 to the end cap assembly 12 avoids interference with other components during the installation of threaded fasteners, thereby improving assembly efficiency. The plate 21 is located on the tray 24 and has a power line 25 and a communication line 26. The power line 25 and the communication line 26 are located on one side of the plate 21 adjacent to the center of the housing 1. In other words, the power line 25 and the communication line 26 are located on the side of the plate 21 adjacent to the battery module 3 in the thickness direction. The power line 25 extends along the left-right direction of the housing 1 and can include a positive line and a negative line. The positive line and the negative line can be connected to the positive and negative terminals of the battery module 3, respectively, via copper busbars or thick wires. Therefore, by placing the power line 25 and the communication line 26 on the same side of the plate 21, the thickness of the battery management system 2 can be reduced, thereby reducing the space occupied by the battery management system 2 in the housing 1, and thus enabling the energy storage device 100 to be miniaturized.

[0159] According to some embodiments of the present invention, such as Figure 18 As shown, the bottom wall of the housing 1 is provided with multiple guide rails 115, which extend along the left and right directions of the housing 1 and are spaced apart from the front and back directions of the housing 1. The battery module 3 is slidably installed inside the housing 1 along the left and right directions of the housing 1, and the bottom surface of the battery module 3 is supported on the multiple guide rails 115.

[0160] For example, in Figure 3 , Figure 5 and Figure 18 In the example, four guide rails 115 are provided on the bottom wall of the housing 1, and the four guide rails 115 are spaced apart from each other along the thickness direction of the housing 1. During installation, one end of the battery module 3 along its length is first fitted into the mounting cavity of the housing 1, and the four guide rails 115 abut against the bottom surface of the battery module 3. Then, the battery module 3 is pushed inward along the length direction of the housing 1 until the battery module 3 is completely pushed into the housing 1. This reduces the contact area between the housing 1 and the battery module 3, thereby reducing the frictional resistance between the housing 1 and the battery module 3, avoiding wear on the coating of the battery module 3 and the inner surface of the housing 1, and thus preventing the housing 1 from rusting or leaking electricity, improving the safety of the energy storage device 100. At the same time, the battery module 3 can be quickly assembled into the housing 1, improving the assembly efficiency of the energy storage device 100.

[0161] Furthermore, such as Figure 18 As shown, each guide rail 115 includes a first connecting section 1151 and a second connecting section 1152. The first connecting section 1151 extends along the vertical direction of the housing 1, and one end of the first connecting section 1151 is connected to the bottom wall of the housing 1. The first connecting section 1151 extends along the front-back direction of the housing 1, and the second connecting section 1152 is connected to the other end of the first connecting section 1151. The bottom surface of the battery module 3 is supported on the second connecting section 1152. This arrangement has two advantages: firstly, the second connecting section 1152 increases the contact area between the guide rail 115 and the bottom surface of the housing 1, which improves the stability of the battery module 3 when it is pushed into the housing 1; secondly, the guide rail 115 acts as a guide to ensure that the battery module 3 can be quickly assembled into the housing 1. At the same time, the guide rail 115 and the top wall of the housing 1 can restrict the movement of the battery module 3 along the width direction of the housing 1. Furthermore, the guide rail 115 has a simple structure and is easy to manufacture.

[0162] Furthermore, such as Figure 18 As shown, each guide rail 115 also includes at least one third connecting segment 1153. One end of the third connecting segment 1153 is connected to the free end of the second connecting segment 1152, and the other end of the third connecting segment 1153 extends obliquely toward the bottom wall of the housing 1. Thus, while ensuring sufficient contact area between the battery module 3 and the guide rail 115, the structural strength of the guide rail 115 can be enhanced.

[0163] In some alternative embodiments, the sum of the lengths of the second connecting segment 1152 and the third connecting segment is less than the length of the first connecting segment 1151. This arrangement prevents the other end of the third connecting segment from contacting the bottom wall of the housing 1 and reduces the material usage of the guide rail 115, thereby lowering the cost of the housing 1.

[0164] In some alternative embodiments, at least one guide rail 115 has a lubricant applied to its top surface. This arrangement can further reduce the frictional resistance between the battery module 3 and the guide rail 115, thereby enabling the battery module 3 to be quickly installed into the housing 1.

[0165] Furthermore, referring to Figure 13 and Figure 19 The energy storage device 100 further includes multiple hanging ears 6, which are respectively located at the left and right ends of the housing 1. The multiple hanging ears 6 cooperate with the first end cap assembly 12 and the second end cap assembly 13, respectively. Both the first end cap assembly 12 and the second end cap assembly 13 have receiving spaces, and the multiple hanging ears 6 are hidden within these receiving spaces. The housing 1 is adapted to be connected to the wall via the multiple hanging ears 6. Thus, by providing multiple hanging ears 6, the energy storage device 100 can be suspended on the wall, thereby improving the utilization rate of the upper indoor space. Moreover, since the multiple hanging ears 6 are hidden within the receiving spaces and their front sides are covered by the housing 1, the energy storage device 100 has a more aesthetically pleasing appearance, enhancing the home's aesthetic appeal and meeting users' aesthetic needs. Furthermore, the energy storage device 100 is connected to the wall via the multiple hanging ears 6 at the left and right ends, providing a high level of protection and allowing for various installation scenarios, suitable for both indoor and outdoor installation, thus improving the versatility of the energy storage device 100.

[0166] Furthermore, referring to Figure 13 and Figure 19 Each end cap 121 is provided with at least one hanging member 1211. Each hanging ear 6 includes a first mounting part 61 and a second mounting part 62. The first mounting part 61 is adapted to be connected to a wall. One end of the second mounting part 62 is connected to the first mounting part 61, and the other end of the second mounting part 62 extends toward the center of the receiving space. At least one hanging hole 621 is formed on the second mounting part 62. The hanging member 1211 and the hanging hole 621 are matched to install the housing 1 on the wall. With this configuration, the structure of the hanging ear 6 is simple and easy to manufacture, thereby reducing costs and simplifying the installation and operation of the energy storage device 100. In addition, the hanging ear 6 occupies little space, which is beneficial for the energy storage device 100 to cover the hanging ear 6, making the appearance of the energy storage device 100 more aesthetically pleasing.

[0167] According to some embodiments of the present invention, with reference to Figure 12The energy storage device 100 further includes a plurality of handles 7, which are respectively located on the side of the first end cap assembly 12 and the second end cap assembly 13 away from the housing 1. In other words, the handles 7 and the battery module 3 are located on opposite sides of the end cap 121, so that the handles 7 are located outside the aforementioned installation space for easy gripping by the operator. The handles 7 and the end cap assemblies (i.e., the aforementioned first end cap assembly 12 and the second end cap assembly 13) are integrally formed. This arrangement eliminates the need for additional parts and operations to install the handles 7, reducing the installation cost and simplifying the installation operation. Furthermore, the handles 7 and the end cap 121 are inseparable, thus ensuring structural stability. When the operator moves the energy storage device 100, especially large or heavy energy storage devices 100, the handles 7 will not detach from the energy storage device 100, preventing the energy storage device 100 from falling during installation, thereby preventing damage to the energy storage device 100 and ensuring the personal safety of the operator.

[0168] Optionally, the housing 1 is made of aluminum alloy.

[0169] According to some embodiments of the present invention, the length of the energy storage device 100 is L1, the width of the energy storage device 100 is L2, and the height of the energy storage device 100 is L3. L1, L2, and L3 respectively satisfy: 0mm < L1 ≤ 685mm, 0mm < L2 ≤ 135mm, and 0mm < L3 ≤ 185mm. Therefore, by limiting the length, width, and height dimensions of the energy storage device 100, the overall size of the energy storage device 100 is made smaller, allowing for a reasonable design of the internal battery module 3, thus enabling a reasonable arrangement of multiple battery cells 321 and multiple battery cell groups 32.

[0170] like Figure 20 and Figure 21 As shown, the energy storage device control system 200 according to a second aspect embodiment of the present invention includes a battery management unit (BMU) 201 and a plurality of energy storage devices 100 connected in parallel. Each energy storage device 100 includes a battery management system (BMS) 2. The battery management unit (BMU) 201 can be communicatively connected to the battery management system (BMS) 2 of each of the plurality of energy storage devices 100, for example, through a controller area network (CAN) bus.

[0171] The battery management unit (BMU) 201 in this application can be made into a separate module. It can monitor the status of the battery management systems (BMS) 2 in all parallel energy storage devices 100, and perform distributed control management (i.e., independent control management of each battery management system 2) and state of charge (SOC) balancing through communication. Regardless of the number of parallel energy storage devices 100, only one main battery management unit (BMU) 201 can be used to control all parallel energy storage devices 100, thus saving costs.

[0172] Furthermore, referring to Figure 21 Each energy storage device 100 also includes a Battery Information Collector (BIC) 202, which is communicatively connected to the Battery Management System (BMS) 2, for example, via a CAN bus. The BIC is mainly used to collect battery data and transmit it to the BMS 2. When abnormal battery data occurs, the BMS can control the disconnector (not shown in the figure) of the corresponding battery's main circuit to open. When the entire system malfunctions, the BMS will receive control commands from the BMU and perform corresponding control actions, such as controlling the relays of the main circuits of all batteries to open.

[0173] Furthermore, such as Figure 21 As shown, the energy storage device control system 200 may further include an Energy Management System (EMS) 203 or an inverter. The EMS 203 or inverter is communicatively connected to the Battery Management Unit 201, for example, via a CAN bus. The Battery Management Unit 201 can transmit the basic state of the battery to the EMS / inverter, and simultaneously receive charging and discharging commands from the EMS / inverter, thereby enabling independent charging and discharging control of each BMS.

[0174] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0175] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0176] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0177] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An energy storage device (100), characterized in that, include: Box (1), with openings (11) on both sides in the left and right directions. A first end cap assembly (12) and a second end cap assembly (13) are respectively disposed on the two sides of the housing (1) and detachably connected to the housing (1). The first end cap assembly (12) and the second end cap assembly (13) are used to close the opening (11). The first end cap assembly (12) and the second end cap assembly (13) together with the housing (1) define a receiving cavity. A battery management system (2) is disposed within the receiving cavity and extends along the left-right direction; and A battery module (3) is disposed in the receiving cavity. The battery module (3) and the battery management system (2) are arranged in the vertical direction. The battery module (3) includes a module housing (31) and multiple cell groups (32). The multiple cell groups (32) are disposed in the module housing (31). At least two of the cell groups (32) are arranged in the vertical direction. Each cell group (32) includes multiple cells (321). The multiple cells (321) are arranged side by side in the front-back direction. Each cell (321) extends in the left-right direction. At least one connecting piece (37) is connected between the side of the battery module (3) adjacent to the opening (11) and the housing (1). The battery module (3) and the battery management system (2) can be moved out of the receiving cavity through the opening (11); The battery module (3) and the battery management system (2) are spaced apart from each other. At least one of the outer surface of the battery module (3) and the inner wall of the housing (1) is provided with a plurality of anti-collision structures (112). The outer surface of the battery module (3) is spaced apart from the inner wall of the housing (1) by the plurality of anti-collision structures (112). The plurality of said anti-collision structures (112) include: Multiple first anti-collision structures (1121) are arranged adjacent to the battery management system (2), and two adjacent first anti-collision structures (1121) are spaced apart along the front-rear direction of the housing (1) to define a first slide groove (1122), and at least a portion of the battery management system (2) is slidably fitted in the first slide groove (1122). A plurality of second anti-collision structures (113) are respectively disposed on two side walls in the front-rear direction of the housing (1), and at least two second anti-collision structures (113) are disposed on each side wall; and Multiple third anti-collision structures (114) are provided on one side of the housing (1) in the vertical direction adjacent to the battery module (3).

2. The energy storage device (100) according to claim 1, characterized in that, At least two second anti-collision structures (113) are spaced apart along the vertical direction of the housing (1), and multiple second anti-collision structures (113) are respectively opposite to two sides of the battery module (3) along the front-rear direction of the housing (1); Multiple third anti-collision structures (114) are spaced apart along the front-rear direction of the housing (1), and the bottom surface of the battery module (3) is supported on the multiple third anti-collision structures (114).

3. The energy storage device (100) according to claim 1, characterized in that, At least one clearance notch (373) is formed on the connecting piece (37) for avoiding the second anti-collision structure (113).

4. The energy storage device (100) according to claim 1, characterized in that, Both the first end cap assembly (12) and the second end cap assembly (13) are sealed to the housing (1).

5. The energy storage device (100) according to claim 4, wherein the first end cap assembly (12) includes a first inner end cap (121), the first inner end cap (121) is detachably disposed at the opening (11) and closes the opening (11), and a switch (8) is provided on the first inner end cap (121), the switch (8) communicates with the battery management system (2), and the switch (8) is used to control the power-on and power-off of the energy storage device (100); The first end cap assembly (12) further includes a first outer end cap (122), which is detachably connected to the first inner end cap (121) and together with the first inner end cap (121) defines a first space, and the switch (8) is located in the first space.

6. The energy storage device (100) according to claim 1, characterized in that, The second end cap assembly (13) includes a connector (133) to which at least one of the power line (25) and communication line (26) of the battery management system (2) and the battery module (3) is electrically connected, and the connector (133) is used to electrically connect to an external cable.

7. The energy storage device (100) according to claim 6, characterized in that, The second end cap assembly (13) includes a second inner end cap (131), which is detachably connected to the housing (1), and the wiring component (133) is provided on the second inner end cap (131). The second end cap assembly (13) further includes a second outer end cap (132), which is detachably connected to the second inner end cap (131) and defines a second space with the second inner end cap (131), and the connector (133) is disposed in the second space.

8. The energy storage device (100) according to claim 1, characterized in that, The surface area of ​​the box (1) along the left and right directions is smaller than the surface area of ​​the surface in the other directions.

9. The energy storage device (100) according to claim 1, characterized in that, The box (1) includes multiple side walls, and the connection between two adjacent side walls is provided with a chamfer or rounded corner.

10. The energy storage device (100) according to claim 1, characterized in that, At least one first separator (33) is provided between two adjacent cells (321), and the two adjacent cells (321) are separated by the first separator (33). The width of the first separator (33) is smaller than the width of the cell (321).

11. The energy storage device (100) according to claim 10, characterized in that, The thickness of the first separator (33) is w, wherein w satisfies: 0.1mm≤w≤1mm.

12. The energy storage device (100) according to claim 11, characterized in that, A plurality of first separators (33) are provided between two adjacent cells (321), the plurality of first separators (33) are spaced apart along the vertical direction, and each first separator (33) extends along the horizontal direction.

13. The energy storage device (100) according to claim 10, characterized in that, The outermost cell (321) in the cell group (32) is the first cell (322). At least one second separator (34) is provided between the first cell (322) and the inner wall of the housing (1). The first cell (322) and the inner wall of the housing (1) are separated by the second separator (34). The width of the second separator (34) is smaller than the width of the cell (321).

14. The energy storage device (100) according to claim 1, characterized in that, A first insulating element (35) is provided between two adjacent battery cell groups (32).

15. The energy storage device (100) according to claim 1, characterized in that, At least one second insulating member (36) is provided between the outer surface of the battery module (3) and the inner wall of the housing (1), and the outer surface of the battery module (3) is separated from the inner wall of the housing (1) by the second insulating member (36).

16. The energy storage device (100) according to claim 15, characterized in that, The module housing (31) includes: Two first side plates (311) are spaced apart from each other and are located on the front and rear sides of the battery module (3). Two second side plates (312) are spaced apart from each other and are located on the upper and lower sides of the battery module (3). The two second side plates (312) and the two first side plates (311) together define a storage cavity for accommodating a plurality of the battery cell groups (32). The second insulating member (36) is disposed between the outer surface of the battery module (3) and the first side plate (311) and / or the second side plate (312).

17. The energy storage device (100) according to claim 16, characterized in that, There are multiple second insulating elements (36), and the multiple second insulating elements (36) include: A plurality of first sub-insulators (361), at least one of the first sub-insulators (361) is disposed on the first side plate (311) and the surface of the battery module (3) opposite to the first side plate (311); A plurality of second sub-insulators (362), at least one of the second sub-insulators (362) being disposed on the second side plate (312) and the surface of the battery module (3) opposite to the second side plate (312).

18. The energy storage device (100) according to claim 1, characterized in that, The connecting piece (37) includes a first side and a second side in the front-rear direction of the housing (1), the first side being connected to the side of the battery module (3) adjacent to the opening (11), the second side being connected to the housing (1), and the length of the first side in the vertical direction of the housing (1) being greater than the length of the second side in the vertical direction of the housing (1).

19. The energy storage device (100) according to claim 18, characterized in that, A plurality of first connecting holes (371) are formed on the first side, and the plurality of first connecting holes (371) are spaced apart along the vertical direction of the housing (1); The energy storage device (100) further includes: Multiple first fasteners (4) pass through multiple first connection holes (371) to connect the connecting piece (37) to the battery module (3).

20. The energy storage device (100) according to claim 19, characterized in that, A plurality of second connecting holes (372) are formed on the second side, and the plurality of second connecting holes (372) are spaced apart along the vertical direction of the housing (1); The inner wall of the receiving cavity is provided with a plurality of connecting structures (111), and the plurality of connecting structures (111) are spaced apart along the vertical direction of the box (1). The energy storage device (100) further includes: Multiple second fasteners (5) pass through multiple second connecting holes (372) and are connected to multiple connecting structures (111).

21. The energy storage device (100) according to claim 20, characterized in that, The plurality of second connection holes (372) are respectively located at both ends of the second side in the vertical direction of the housing (1).

22. The energy storage device (100) according to claim 21, characterized in that, The plurality of first connecting holes (371) include a first sub-connecting hole (3711) and a second sub-connecting hole (3712), the first sub-connecting hole (3711) and the second sub-connecting hole (3712) being located at both ends of the first side in the vertical direction of the housing (1); The plurality of second connecting holes (372) include a third sub-connecting hole (3721) and a fourth sub-connecting hole (3722), the third sub-connecting hole (3721) and the fourth sub-connecting hole (3722) are respectively located at both ends of the second side in the vertical direction of the housing (1), the third sub-connecting hole (3721) and the first sub-connecting hole (3711) are located at one end of the length direction of the connecting piece (37), and the fourth sub-connecting hole (3722) and the second sub-connecting hole (3712) are located at the other end of the direction of the connecting piece (37); The distance between the third sub-connecting hole (3721) and the first sub-connecting hole (3711) is greater than the distance between the fourth sub-connecting hole (3722) and the second sub-connecting hole (3712).

23. The energy storage device (100) according to claim 22, characterized in that, The distance between the third sub-connecting hole (3721) and the fourth sub-connecting hole (3722) is greater than the distance between the first sub-connecting hole (3711) and the second sub-connecting hole (3712).

24. The energy storage device (100) according to claim 22, characterized in that, The line connecting the center of the first sub-connecting hole (3711) and the center of the third sub-connecting hole (3721) is the first connecting line, and the line connecting the center of the second sub-connecting hole (3712) and the center of the fourth sub-connecting hole (3722) is the second connecting line. From the second side toward the first side, the distance between the first line and the second line gradually increases.

25. The energy storage device (100) according to claim 1, characterized in that, Multiple anti-collision structures (112) are provided on the inner wall surface of the housing (1). The multiple anti-collision structures (112) are arranged at intervals along the circumference of the housing (1). Each anti-collision structure (112) extends along the left-right direction of the housing (1). Each anti-collision structure (112) has a through hole that extends along the left-right direction of the housing (1). The side of the through hole facing the battery module (3) is open.

26. The energy storage device (100) according to claim 1, characterized in that, The battery management system (2) includes a plate (21) and at least one heat sink (22). At least one electrical component (23) is provided on the side of the plate (21) adjacent to the battery module (3). The heat sink (22) is provided on the side of the plate (21) away from the electrical component (23) and the heat sink (22) is at least opposite to the electrical component (23). The heat sink (22) is slidably fitted in the first groove (1122).

27. The energy storage device (100) according to claim 26, characterized in that, The heat sink (22) includes: The first heat dissipation part (221) is provided on the plate (21); The second heat dissipation part (222) is connected to the first heat dissipation part (221). The second heat dissipation part (222) is located on the side of the first heat dissipation part (221) away from the plate (21). The width of the second heat dissipation part (222) in the front-back direction of the box (1) is smaller than the width of the first heat dissipation part (221) in the front-back direction of the box (1). The second heat dissipation part (222) is slidably fitted in the first slide groove (1122).

28. The energy storage device (100) according to claim 26, characterized in that, The heat sink (22) is in contact with the inner wall of the housing (1).

29. The energy storage device (100) according to claim 1, characterized in that, Each of the battery cells (321) includes a battery cell body and a plurality of terminals, wherein the plurality of terminals are respectively disposed at both ends of the battery cell body; The energy storage device (100) further includes: Multiple terminal guide plates (38) are provided on the battery module (3), and the multiple terminal guide plates (38) correspond one-to-one with the multiple battery cell groups (32). The terminal guide plates (38) are located at one end of the multiple battery cells (321), and the terminal guide plates (38) are electrically connected between the terminal at one end of the multiple battery cells (321) and the housing of the battery cell body of the multiple battery cells (321). A cell sampling board (39) is disposed at the other end of a plurality of cells (321), and the cell sampling board (39) is electrically connected to the housing of the cell body of the plurality of cells (321).

30. The energy storage device (100) according to claim 29, characterized in that, The pole guide plate (38) includes: The body (381) extends along the arrangement direction of the plurality of said cells (321), and the body (381) has a first side and a second side in a direction perpendicular to the arrangement direction. A plurality of first connecting pieces (382) are connected to the first side at intervals from each other, and the plurality of first connecting pieces (382) are electrically connected to the terminal post at one end of the plurality of said cells (321); A plurality of second connecting pieces (383) are connected to the second side at intervals from each other, and the plurality of second connecting pieces (383) are electrically connected to the housing of the battery cell body of the plurality of battery cells (321).

31. The energy storage device (100) according to claim 30, characterized in that, Further includes: A sampling board (40) is provided on the side of the cell sampling board (39) away from the battery module (3). The sampling board (40) is provided with at least one connector (401) and the sampling board (40) is electrically connected to the cell sampling board (39) through the connector (401).

32. The energy storage device (100) according to claim 31, characterized in that, Further includes: A protective cover (41) is provided on the side of the acquisition plate (40) away from the cell sampling plate (39).

33. The energy storage device (100) according to claim 6, characterized in that, The battery management system (2) extends along the left-right direction of the housing (1), the battery module (3) and the battery management system (2) are arranged along the up-down direction of the housing (1), and the battery management system (2) is pivotally connected to the first end cap assembly (12) about the central axis of the housing (1) in the front-back direction.

34. The energy storage device (100) according to claim 33, characterized in that, The battery management system (2) includes: The tray (24) is pivotally connected to the first end cap assembly (12); The plate (21) is disposed on the tray (24). The plate (21) is provided with the power line (25) and the communication line (26). The power line (25) and the communication line (26) are located on one side of the plate (21) adjacent to the center of the box (1). The power line (25) extends along the left and right direction of the box (1).

35. The energy storage device (100) according to claim 1, characterized in that, The bottom wall of the box (1) is provided with a plurality of guide rails (115), the plurality of guide rails (115) extend along the left and right directions of the box (1), and the plurality of guide rails (115) are spaced apart from the front and back directions of the box (1). The battery module (3) is slidably disposed inside the housing (1) along the left and right directions of the housing, and the bottom surface of the battery module (3) is supported on a plurality of guide rails (115).

36. The energy storage device (100) according to claim 35, characterized in that, Each of the guide rails (115) includes: The first connecting segment (1151) extends along the vertical direction of the box (1), and one end of the first connecting segment (1151) is connected to the bottom wall of the box (1). The second connecting segment (1152) extends along the front-rear direction of the housing (1), and the second connecting segment (1152) is connected to the other end of the first connecting segment (1151). The bottom surface of the battery module (3) is supported on the second connecting segment (1152).

37. The energy storage device (100) according to claim 36, characterized in that, Each of the guide rails (115) also includes: At least one third connecting segment (1153), one end of which is connected to the free end of the second connecting segment (1152), and the other end of which extends obliquely toward the bottom wall of the housing (1).

38. The energy storage device (100) according to claim 37, characterized in that, The sum of the lengths of the second connecting segment (1152) and the third connecting segment is less than the length of the first connecting segment (1151).

39. The energy storage device (100) according to claim 35, characterized in that, At least one of the guide rails (115) has a lubricant applied to its top surface.

40. The energy storage device (100) according to claim 1, characterized in that, Further includes: Multiple hanging ears (6) are respectively located at the left and right ends of the box (1). The multiple hanging ears (6) cooperate with the first end cap assembly (12) and the second end cap assembly (13). The first end cap assembly (12) and the second end cap assembly (13) both have a receiving space. The multiple hanging ears (6) are hidden in the receiving space. The box (1) is adapted to be connected to the wall through the multiple hanging ears (6).

41. The energy storage device (100) according to claim 40, characterized in that, At least one suspension member (1211) is provided on the first end cap assembly (12) and the second end cap assembly (13). Each of the aforementioned loops (6) includes: A first mounting part (61) is adapted to be connected to the wall; The second mounting part (62) has one end connected to the first mounting part (61) and the other end extending toward the center of the accommodating space. At least one hanging hole (621) is formed on the second mounting part (62), and the box (1) is adapted to be mounted on the wall by the cooperation of the hanging member (1211) with the hanging hole (621).

42. The energy storage device (100) according to claim 1, characterized in that, Further includes: Multiple handles (7) are provided on the side of the first end cap assembly (12) and the second end cap assembly (13) away from the box body (1), and the handles (7) and the corresponding end cap assemblies are integrally formed.

43. The energy storage device (100) according to claim 1, characterized in that, The enclosure is made of aluminum alloy.

44. The energy storage device (100) according to any one of claims 1-43, characterized in that, The length of the energy storage device (100) is L1, the width of the energy storage device (100) is L2, and the height of the energy storage device (100) is L3. L1, L2, and L3 respectively satisfy: 0mm < L1 ≤ 685mm, 0mm < L2 ≤ 135mm, and 0mm < L3 ≤ 185mm.

45. A control system for an energy storage device (200), characterized in that, include: Multiple energy storage devices (100) are connected in parallel, each of the energy storage devices (100) includes a battery management system, and the energy storage device (100) is an energy storage device (100) according to any one of claims 1-44. A battery management unit (201) is communicatively connected to each of the battery management systems (2) in the plurality of energy storage devices (100).

46. ​​The energy storage device control system (200) according to claim 45, characterized in that, Each of the energy storage devices (100) further includes a battery information collector (202), which is communicatively connected to the battery management system (2).

47. The energy storage device control system (200) according to claim 45, characterized in that, Also includes: A power management system (203) or inverter, wherein the power management system (203) or inverter is communicatively connected to the battery management unit (201).

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