CN222995491U

CN222995491U - Energy storage devices and energy storage systems

Info

Publication number: CN222995491U
Application number: CN202421523915.6U
Authority: CN
Inventors: 万奇历; 汤孝东; 王能刚; 尹雪芹; 尹小强
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2024-06-28
Filing date: 2024-06-28
Publication date: 2025-06-17
Anticipated expiration: 2034-06-28

Abstract

The present disclosure relates to an energy storage device and an energy storage system, wherein the energy storage device comprises: a shell, the shell is suitable for forming a first accommodating cavity and a second accommodating cavity, a battery module, the battery module is suitable for being arranged in the first accommodating cavity, at least part of the battery module is in contact with a cooling medium, and a control module, the control module is suitable for being arranged in the second accommodating cavity, and the control module is electrically connected to the battery module. In this way, at least part of the battery modules in the first accommodating cavity are in direct contact with the cooling medium, which can be cooled in all directions to ensure the heat dissipation effect and improve the heat dissipation efficiency. In addition, the coolant can prevent the battery pack from catching fire, and has high safety performance. The energy storage device module is flexible in module configuration and has strong adaptability. It adopts independent modules of small units, which are flexible in configuration and can adapt to the different power requirements of industry and commerce. The control module is integrated in the energy storage device, which realizes the unitization and modularization of the energy storage system, and improves the convenience and economy of the battery energy storage system.

Description

Energy storage device and energy storage system

Technical Field

The present disclosure relates to the field of energy storage technologies, and in particular, to an energy storage device and an energy storage system.

Background

With the rapid development of technology, an energy storage battery cabinet is used as a practical energy storage device and has been widely applied to various industries.

In the related art, the energy storage battery cabinet is characterized in that a battery module and a control module are respectively and independently arranged in a plurality of independent cabinets, and a plurality of cabinets are stacked and placed, so that the problems of low integration level and large occupied space exist.

Disclosure of utility model

It is an object of the present disclosure to provide an energy storage device and an energy storage system to at least partially solve the problems in the related art.

To achieve the above object, the present disclosure provides an energy storage device comprising:

A housing adapted to form a first receiving chamber and a second receiving chamber,

A battery module adapted to be disposed in the first receiving chamber, at least a portion of the battery module being in contact with a cooling medium, and

The control module is suitable for being arranged in the second accommodating cavity, and the control module is electrically connected with the battery module.

Optionally, the control module is located above the battery module.

Optionally, at least a portion of the battery module is immersed in a cooling medium.

Optionally, the energy storage device further comprises:

The base module comprises a tray, the battery module is arranged on the tray, and a liquid inlet hole and a liquid outlet hole are formed in the tray.

Optionally, the housing comprises:

The top plate is positioned at the top end of the first accommodating cavity, a spraying assembly is arranged on the top plate, and the spraying assembly is connected with the liquid inlet through a pipeline.

Optionally, the battery module includes:

The cell module comprises a plurality of cell modules, gaps are reserved between the adjacent cell modules, a perforated plate is arranged at one end part of each cell module in the width direction, a liquid storage cavity is arranged between the perforated plate and the shell, the liquid inlet is communicated with the liquid storage cavity, and a through hole is formed in the position, corresponding to the gaps, of the perforated plate.

Optionally, a runner part covered above the liquid inlet is installed on the tray, the runner part is constructed as a hollow structure, and a liquid flow hole communicated with the liquid storage cavity is formed at the top end of the runner part.

Optionally, the battery module includes at least one cell assembly including a plurality of cells stacked side by side, front and rear end plates mounted to opposite ends of the cell assembly in a width direction, and a pull plate connected between the front and rear end plates, the pull plate being mounted at a top and/or bottom end of the cell assembly.

Optionally, the battery module includes a plurality of the cell assemblies, and the plurality of the cell assemblies are stacked along the height direction.

Optionally, the battery module further includes a support frame detachably connected with the front end plate, the rear end plate, and the housing, respectively.

Optionally, the battery module further comprises a spacer block, and the spacer block is mounted at the bottom end of the lowest cell assembly.

Optionally, the pad includes at least one bump and at least one concave block, the bump and the concave block are alternately arranged side by side in a height direction, and a width of the bump is larger than a width of the concave block.

Optionally, the casing is constructed as multilayer structure, multilayer structure includes along the wall thickness direction of casing is arranged in proper order first layer and second layer, first layer with the material of second layer is glass steel, first layer with have the cavity between the second layer, the cavity intussuseption is filled with gas.

Optionally, the housing includes a first housing forming the first accommodating chamber and a second housing forming the second accommodating chamber.

Optionally, the second housing includes a cabinet body and a cover plate assembly, a top end opening of the cabinet body is provided, and the cover plate assembly is openably connected to the cabinet body.

Optionally, the top and/or bottom end of the housing is provided with a stiffening ring.

Optionally, the control module includes at least one of a BMS, a PCS, a power distribution module, and a bus module.

According to a second aspect of the present disclosure, there is also provided an energy storage system comprising at least one energy storage device, the energy storage device being the energy storage device described above.

Through above-mentioned technical scheme, at least partial battery module and the coolant direct contact in the first chamber that holds can all-round cooling, guarantees the radiating effect, improves radiating efficiency. And the cooling liquid can prevent the battery pack from igniting, and the safety performance is high. The cooling liquid circulation system is only used in the battery module, so that the number of outgoing lines can be reduced to the greatest extent, and the sealing performance of the battery module is effectively ensured. The energy storage device is flexible in module assembly and strong in adaptability, adopts independent modules of small units, is flexible in assembly and meets different requirements of industry and commerce on electric quantity, and the control module is integrated in the energy storage device, so that the unitization and modularization of the energy storage system are realized, and the convenience and the economy of the battery energy storage system are improved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic diagram of an energy storage device according to an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic illustration of an energy storage device according to an exemplary embodiment of the present disclosure with a first housing removed;

FIG. 3 is a schematic diagram of an energy storage device removal control module provided in an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic view of another angle of the energy storage device removal control module provided by an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a cooling fluid circulation flow of an energy storage device provided in an exemplary embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a cell assembly in an energy storage device according to an exemplary embodiment of the present disclosure;

Fig. 7 is a schematic structural view of a support frame in an energy storage device according to an exemplary embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a spacer block in an energy storage device according to an exemplary embodiment of the present disclosure;

fig. 9 is a schematic structural view of a first housing in an energy storage device according to an exemplary embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a control module in an energy storage device according to an exemplary embodiment of the present disclosure;

FIG. 11 is a schematic structural view of a cover plate assembly in an energy storage device according to an exemplary embodiment of the present disclosure;

FIG. 12 is a schematic view of a cabinet in an energy storage device according to an exemplary embodiment of the present disclosure;

FIG. 13 is a schematic view of another angle of a cabinet in an energy storage device according to an exemplary embodiment of the present disclosure;

FIG. 14 is a schematic view of a base module with drain plates removed from the energy storage device according to an exemplary embodiment of the present disclosure;

FIG. 15 is a schematic view of a base module in an energy storage device according to an exemplary embodiment of the present disclosure;

fig. 16 is another angular structural schematic diagram of a base module in an energy storage device according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

10-Shell, 101-top plate, 102-first shell, 103-second shell, 1-battery module, 111-reinforcing ring, 112-observation window, 12-cell assembly, 121-front end plate, 1211-connecting block, 122-rear end plate, 123-pulling plate, 124-cell, 125-limit boss, 13-support frame, 131-vertical rod, 132-beam, 133-reinforcing beam, 14-cushion block, 141-bump, 142-concave block, 15-perforated plate, 151-through hole, 16-runner, 161-fluid hole, 2-control module, 211-cabinet, 2111-threading opening, 212-cover plate assembly, 2121-main body part, 2122-cover body part, 2131-first air inlet window, 2132-second air inlet window, 214-air outlet opening, 215-air outlet opening, 216-limit boss, 22-exhaust pipe, 3-base module, 31-support plate, 311-fluid inlet pipe, 312-fluid outlet opening, 313-connecting column, 314-positioning column, 321-support frame, 323-vertical column, and drain plate

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In this disclosure, unless otherwise indicated, the use of the terms "upper," "lower," "top," and "bottom" are defined based on the orientation in which the relevant components are actually used. The azimuth words "width direction" and "height direction" are used based on the directions of the drawings, and referring to fig. 2, "width direction" and "height direction" are merely definitions for convenience of description, and do not limit the dimensional relationship of the directions. The terms "inner" and "outer" are used with respect to the outline of the corresponding component, and the words "first" and "second" are used for distinguishing between different components and not for order or importance. In the present disclosure, when the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated.

Referring to fig. 1 to 16, the present disclosure provides an energy storage device, which may include a case 10, a battery module 1, and a control module 2, wherein the case 10 is adapted to form a first receiving cavity and a second receiving cavity, the battery module 1 is adapted to be disposed in the first receiving cavity, at least a portion of the battery module 1 is in contact with a cooling medium, the control module 2 is adapted to be disposed in the second receiving cavity, and the control module 2 is electrically connected with the battery module 1, thereby realizing unitization and modularization of an energy storage system.

In addition, a temperature sensing device can be attached to the battery module 1, and the temperature of a plurality of points on the battery cell can be detected so as to monitor the temperature working condition of the battery cell during working. When the battery cell is higher than a certain temperature, the intelligent system starts the water chiller device, and the heat of the battery cell is taken away through cooling liquid circulation.

In some embodiments, referring to fig. 1, the control module 2 may be located above the battery module 1, so that coolant at the battery module 1 can be prevented from flowing to the control module 2, and the maintenance is facilitated. The relative positions of the control module 2 and the battery module 1 are not limited in the present disclosure, and all belong to the protection scope of the present disclosure.

In one embodiment of the present disclosure, at least a portion of the battery module 1 is immersed in the cooling medium. At least part of the battery modules 1 in the first accommodating cavity are immersed in the cooling liquid, and the immersed cooling liquid is driven to circulate through the external water chiller equipment, so that the battery modules 1 are cooled in all directions, the heat dissipation effect is guaranteed, the heat dissipation efficiency is improved, and the safety performance is high. At the same time, the submerged cooling liquid plays a role in preventing the battery from firing.

As an exemplary embodiment of the present disclosure, referring to fig. 14 and 16, the energy storage device may further include a base module 3, where the base module 3 includes a tray 31, the battery module 1 is mounted on the tray 31, and a liquid inlet 311 and a liquid outlet 312 are formed in the tray 31. The tray 31 may be made of an aluminum alloy material, and a plurality of connection posts 313 and a plurality of positioning posts 314 are mounted on an upper end surface thereof. The connecting column 313 is used for being connected with the cushion block 14 through bolts, and the positioning column 314 is used for limiting the cushion block 14. Specifically, the bottom end of the spacer 14 may be provided with a recess for the positioning post 314 to extend into.

In the embodiment of the disclosure, pressure sensors are installed at the liquid inlet 311 and the liquid outlet 312, and the pressure of the liquid inlet 311 and the liquid outlet 312 is monitored to control the supply of the cooling liquid by the chiller device. When the liquid level is higher than the designed water level by a certain height, the liquid pressure is increased, the liquid outlet amount is controlled by an intelligent system until the liquid level returns to the vicinity of the designed water level, when the liquid level is lower than the designed water level by a certain height, the liquid outlet amount is reduced by the intelligent system until the liquid level returns to the vicinity of the designed water level, when thermal runaway occurs, the evaporated gas is discharged through an exhaust pipe 22 which is mentioned below, and when the liquid level is lower than the designed water level by a certain height, the liquid pressure is reduced, and the liquid outlet amount is reduced by the intelligent system until the liquid level returns to the vicinity of the designed water level.

In one embodiment of the present disclosure, the housing 10 may include a top plate 101 at the top end of the first receiving chamber, and a spray assembly is mounted on the top plate 101, and is connected to the liquid inlet 311 through a pipe. The cooling liquid flows into the duct through the liquid inlet holes 311 and then flows into the spray assembly on the top plate 101 through the duct, thereby being sprayed toward the battery modules 1 to contact the battery modules 1 with the cooling medium. In particular, the conduit may be selected as a hose.

In some embodiments, referring to fig. 4, the battery module 1 may include a plurality of cell assemblies 12, a gap is formed between adjacent cell assemblies 12, a perforated plate 15 is installed at one end of the cell assemblies 12 along the width direction, a liquid storage cavity is formed between the perforated plate 15 and the housing 10, a liquid inlet 311 is communicated with the liquid storage cavity, and a through hole 151 is formed in a position on the perforated plate 15 corresponding to the gap. Specifically, the liquid inlet 311 and the liquid outlet 312 are located on opposite sides of the tray 31 in the width direction. The cooling liquid enters the liquid storage cavity of the battery module 1 from the liquid inlet hole 311, enters the gap between each layer of the cell assemblies 12 from the lateral direction through the through holes 151 on the perforated plate 15, transversely flows to the other side of the cell assemblies 12, takes away the heat of the cell, finally flows out through the liquid outlet hole 312, and the cooling liquid circulation mode is as shown in fig. 5, and the arrow direction in fig. 5 is the flowing direction of the cooling liquid.

Further, referring to fig. 4, the tray 31 may be provided with a flow passage portion 16 covering over the liquid inlet 311, the flow passage portion 16 being constructed in a hollow structure, and a liquid outlet 161 communicating with the liquid storage chamber being formed at a tip end of the flow passage portion 16. The gate 16 can block the gap between the tray 31 and the lowermost cell assembly 12. Since the spacer 14 is installed between the cell assembly 12 and the tray 31, a gap is formed between the cell assembly 12 and the tray 31, and if the cooling liquid flows in from the liquid inlet hole 311, the cooling liquid may flow from the gap to the other side of the cell assembly 12, but cannot pass through the gap between the adjacent cell assemblies 12, so the flow path portion 16 is provided, the cooling liquid enters the cavity of the flow path portion 16 from the liquid inlet hole 311, flows to the liquid storage cavity through the liquid outlet hole 161, and flows to the other end of the cell assembly 12 through the gap between the adjacent cell assemblies 12.

According to some embodiments, referring to fig. 14, the base module 3 may further include a bracket 32 installed at the bottom end of the tray 31, the bracket 32 including a plurality of support beams 321 horizontally connected to the bottom end of the tray 31 and columns 322 vertically connected to the bottom end of the support beams 321. The bracket 32 may be a steel structure welded square tube, and the plurality of support beams 321 are vertically staggered.

Further, the liquid inlet 311 may be connected with a liquid inlet pipe 3111, and the support beam 321 is provided with a mounting hole through which the liquid inlet pipe 3111 passes. The liquid inlet 311 and the liquid outlet 312 are made of 90-degree clamping sleeve connectors, and the clamping sleeve connectors and the liquid inlet 3111 are made of stainless steel, so that the cooling device is good in stability, not easy to corrode, strong in rigidity and high in durability, and is more suitable for being in an environment filled with cooling liquid for a long time than other materials.

Further, referring to fig. 15, a drain plate 323 may be installed at the bottom end of the support beam 321, and a liquid inlet pipe 3111 is disposed between the drain plate 323 and the tray 31, and a plurality of liquid discharge holes 3231 are formed in the drain plate 323. The drain plate 323 can protect the inlet pipe 3111 and timely drain the water leakage of the inlet pipe 3111.

In some embodiments, referring to fig. 2 and 6, the battery module 1 may include at least one cell assembly 12, and the cell assembly 12 may include a plurality of cells 124 arranged in a side-by-side stack, front and rear end plates 121 and 122 mounted to opposite ends of the cell assembly 12 in a width direction, and a pull plate 123 connected between the front and rear end plates 121 and 122, the pull plate 123 being mounted at a top and/or bottom end of the cell assembly 12. Specifically, the pull plate 123 may be fastened to the front end plate 121 and the rear end plate 122 by bolts, and the lower edges of the front end plate 121 and the rear end plate 122 may be connected with a connection block 1211 for bolting to the pull plate 123. Front end plate 121, back end plate 122, and pull plate 123 enclose cells 124 therein to form cell assembly 12. Specifically, the number of the pull plates 123 of each cell assembly 12 may be plural, and both ends thereof are connected to the front end plate 121 and the rear end plate 122, respectively, and the pull plates 123 extend in a direction perpendicular to the connection plate 121.

Further, the battery module 1 may include a plurality of cell assemblies 12, and the plurality of cell assemblies 12 are stacked in the height direction. The number of the cell assemblies 12 is not limited in the present disclosure, and can be adjusted according to actual requirements.

In some embodiments, referring to fig. 3, the battery module 1 may further include a support bracket 13, and the support bracket 13 is detachably connected with the front end plate 121, the rear end plate 122, and the case 10, respectively. The supporting frame 13 is mainly used for connecting the shell 10 and the base module 3 and reinforcing the whole energy storage device.

Referring to fig. 7, the support frame 13 may include a plurality of vertical rods 131 connected to the front and rear end plates 121 and 122 and a cross beam 132 connected to the housing 10, the vertical rods 131 being disposed at front and rear ends of the cell assembly 12, and the cross beam 132 being disposed at a top end of the cell assembly 12. The vertical rods 131 and the front and rear end plates 121 and 122 of each cell assembly 12 may be connected by fasteners such as bolts, and the top of the vertical rods 131 and the cross members 132 are detachably connected, e.g., bolted, to the housing 10, respectively. In the embodiment of the present disclosure, the support frame 13 includes a plurality of montants 131 and a plurality of crossbeams 132, can be connected with stiffening beam 133 between two adjacent montants 131, and the cross section of stiffening beam 133 can be constructed to L shape, plays the reinforcement effect, can open pores in order to avoid blockking the coolant liquid and pass through on its face.

According to an exemplary embodiment of the present disclosure, referring to fig. 3, one of the adjacent cell assemblies 12 may be provided with a vertically extending locating pin 125, and the other one with a locating hole into which the locating pin 125 extends. In the practice of the present disclosure, the positioning pins 125 are mounted at the top ends of the front end plate 121 and/or the rear end plate 122, and positioning holes are opened at the bottom ends of the adjacent front end plate 121 and/or rear end plate 122, and the cooperation of the positioning pins 125 and the positioning holes is used for positioning of each layer of the stack of the cell assemblies 12.

Further, the length of the positioning pin 125 is greater than the depth of the positioning hole, so that a gap is provided between adjacent cell assemblies 12. The cooperation of the positioning pins 125 and the positioning holes can ensure the interval between the adjacent cell assemblies 12, so that the cooling liquid can flow through the interval.

In some embodiments, referring to fig. 2, the battery module 1 may further include a spacer 14, the spacer 14 being mounted at the bottom end of the lowermost cell assembly 12. In the embodiment of the present disclosure, the pad 14 is a bakelite pad. Further, the connection block 1211 of the bottommost cell assembly 12 may be connected to the spacer 14 by a bolt, and the bottom of the vertical rod 131 may also be connected to the spacer 14 by a bolt.

In some embodiments, referring to fig. 8, the pad 14 may include at least one protrusion 141 and at least one recess 142, the protrusion 141 and the recess 142 being alternately juxtaposed in a height direction, and a width of the protrusion 141 being greater than a width of the recess 142, such that the pad 14 is formed with a plurality of recess grooves. The creepage distance of the bakelite cushion block is 275mm, and the breakdown distance is 120mm. The creepage distance refers to the distance that current walks on the surface of an insulator (bakelite), and the bakelite cushion block has a multi-layer structure, so that the creepage distance can be increased by increasing the path length through which the current passes, and the thickness of the bakelite cushion block can be reduced under the same creepage distance requirement. Specifically, the bakelite pad may include three protrusions 141 and three recesses 142.

Specifically, the housing 10 may be configured as a multi-layer structure, including a first layer and a second layer sequentially arranged along the wall thickness direction of the housing 10, where the first layer and the second layer are made of glass fiber reinforced plastics, and a cavity is formed between the first layer and the second layer, and the cavity is filled with gas, which may be air. The design can ensure the insulation performance of the shell 10, simplify the structure, enable the shell to have better electrical isolation performance and heat preservation performance, and reduce the thermal interference to an energy storage system from the outside. Because the housing 10 is made of glass fiber reinforced plastic with good insulation performance, the gap between the battery cell assembly 12 and the housing 10 can be greatly reduced. On the premise of the same energy, the volume of the energy storage device is effectively reduced, and the overall energy density is improved. Meanwhile, because the gap is small, the using amount of the cooling liquid can be greatly reduced, the utilization rate of the cooling liquid can be effectively improved, and the cost can be reduced. Specifically, the minimum clearance of the support frame 13 and the housing 10 is about 6.5mm, and the minimum clearance of the cell assembly 12 and the housing 10 is about 20mm. In other embodiments, the housing 10 may be made of acrylic, plastic, or the like.

As an exemplary embodiment of the present disclosure, referring to fig. 9 and 10, the case 10 may include a first case 102 forming a first receiving chamber and a second case 103 forming a second receiving chamber. Specifically, the top plate 101 may be formed at the bottom end of the second housing 103. The first casing 102 can be compressed tightly between second casing 103 and tray 31, and second casing 103 relies on holistic bolt tightening's power with tray 31 to press from both sides tight first casing 102, when guaranteeing energy storage device stability, fastness and leakproofness, can effectively prevent the lateral wall collision of electric core subassembly 12 and first casing 102, avoids damaging.

As an exemplary embodiment of the present disclosure, referring to fig. 10, the second housing 103 may include a cabinet 211 and a cover assembly 212, the top end of the cabinet 211 being provided with an opening, the cover assembly 212 being openably and closably connected to the cabinet 211. When the internal equipment needs to be installed, serviced, or removed, an operator may open the cover assembly 212 to perform the work. Wherein, the cabinet body 211 is of a box-type structure without a cover, the bottom end plate of the cabinet body 211 is used for being connected with the battery module 1, and a threading opening 2111 for a battery cable to pass through is formed in the bottom end plate of the cabinet body 211. In the embodiment of the present disclosure, the bottom end plate of the cabinet 211 is the top plate 101.

Further, the cover assembly 212 may include a body 2121 and a cover 2122, the body 2121 being coupled to an edge of the top of the cabinet 211, the body 2121 having an opening communicating with a top opening of the cabinet 211, the cover 2122 being openably and closably coupled to the body 2121 to be able to open or cover the opening. Specifically, the cabinet 211 and the main body 2121 may be connected by a waterproof seal. Through paste the inside of establishing one deck waterproof rubber ring and paste the outside of establishing one deck waterproof rubber ring at both junction in both junction, carry out dual protection, ensure its leakproofness. The cover 2122 may be connected to the main body 2121 via a hinge.

Further, the top surface of the cover 2122 may be inclined downward. Specifically, the top surface of the cover 2122 has an inclination angle of about 2% -5%, which may be 3%, and rainwater on the cover 2122 can fall down the inclined surface during raining.

In some embodiments, referring to fig. 11 and 12, a first air inlet 2131 is provided on the cabinet 211, a fan is provided in a position corresponding to the first air inlet 2131 in the cabinet 211, and an air outlet 214 is provided in the main body 2121. The first air inlet 2131 is openable for convenient operation by an operator, and the cabinet 211 may further be provided with a second air inlet 2132. In the embodiment of the present disclosure, a BMS (Battery MANAGEMENT SYSTEM ) may be installed at a position corresponding to the first air intake window 2131 in the cabinet 211, a PCS (propulsion control system, process control system) may be installed at a position corresponding to the second air intake window 2132 in the cabinet 211, the BMS and the PCS may dissipate heat by means of their own heat dissipation fans, cool air is sucked from the first air intake window 2131 and the second air intake window 2132 through the fans, heat is taken away through the device itself, and finally hot air is discharged from the air outlet 214. Compared with other heat dissipation systems, BMS and PCS with heat dissipation fans are selected, so that energy consumption can be reduced, a product structure is simplified, and the integration level of the energy storage unit is improved. Specifically, the first and second air intake windows 2131 and 2132 may be configured in a louver structure.

Further, referring to fig. 11, an air exhausting portion 215 is mounted on the top of the body portion 2121, the air exhausting portion 215 communicates with the second accommodating chamber, and an air exhausting opening 214 is formed on a side wall of the air exhausting portion 215. The air outlet 214 is a heat radiation opening for the internal equipment of the control module 2. In consideration of outdoor rain protection, the louver is installed on the air outlet 214 in such a way that the air outlet 215 is laterally opened, so that rainwater is prevented from entering the cabinet while hot air in the interior equipment area is discharged.

Further, referring to fig. 13, an exhaust pipe 22 is provided in the second housing 103, one end of the exhaust pipe 22 extends into the first accommodation chamber, and the other end extends out of a side wall of the second housing 103. When thermal runaway occurs, the evaporated gas may be discharged through the exhaust pipe 22.

In some embodiments, the top and/or bottom end of the housing 10 may be provided with a stiffening ring 111. In the embodiment of the present disclosure, referring to fig. 9, the top and bottom ends of the first housing 102 are provided with reinforcing rings 111 to increase the strength of the contact position when the first housing 102 is compressed between the second housing 103 and the tray 31. The first housing 102 has a cylinder structure without a top plate and a bottom plate, and an observation window 112 is formed on a cabinet wall, and the observation window 112 and the first housing 102 can be integrally cast. Meanwhile, the top and bottom ends of the shell wall may be provided with reinforcing rings 111 for reinforcing structural rigidity, and made of steel.

In some embodiments, the control module 2 may include at least one of a BMS, a PCS, a power distribution module, and a bus module. Wherein, a plurality of spacing boss 216 can be installed to cabinet 211 bottom end plate's upper end to spacing to equipment such as BMS, PCS.

In the embodiment of the disclosure, the height of the housing 10 may be 1500mm to 160 mm, specifically 1550mm, the thickness may be 10mm to 20mm, specifically 14mm, the length may be 1000mm to 1100mm, specifically 1030mm, the width may be 900mm to 1000mm, specifically 960mm, and the height of the housing 10 may be adjusted according to the number of layers of the internal cell assembly 12. The present disclosure is not limited in the size of the energy storage device.

According to a second aspect of the present disclosure, there is also provided an energy storage system, which may comprise at least one energy storage device, which is the energy storage device described above. The energy storage system has all the beneficial effects of the energy storage device, and the description is omitted herein.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. An energy storage device, comprising:

2. The energy storage device of claim 1, wherein the control module is located above the battery module.

3. The energy storage device of claim 1, wherein at least a portion of the battery module is immersed in a cooling medium.

4. The energy storage device of claim 1, further comprising:

5. The energy storage device of claim 4, wherein said housing comprises:

6. The energy storage device of claim 4, wherein the battery module comprises:

7. The energy storage device as defined in claim 6, wherein a flow passage part is mounted on the tray and covers the liquid inlet, the flow passage part is constructed as a hollow structure, and a liquid outlet communicating with the liquid storage cavity is formed at the top end of the flow passage part.

8. The energy storage device of claim 1, wherein the battery module comprises at least one cell assembly comprising a plurality of cells arranged in a side-by-side stack, front and rear end plates mounted to opposite ends of the cell assembly in a width direction, and a pulling plate connected between the front and rear end plates, the pulling plate being mounted at a top and/or bottom end of the cell assembly.

9. The energy storage device of claim 8, wherein the battery module comprises a plurality of the cell assemblies stacked in a height direction.

10. The energy storage device of claim 8, wherein the battery module further comprises a support frame detachably connected to the front end plate, the rear end plate, and the housing, respectively.

11. The energy storage device of claim 8, wherein the battery module further comprises a spacer mounted at a bottom end of the lowermost cell assembly.

12. The energy storage device of claim 11, wherein the spacer comprises at least one bump and at least one recess, the bump and the recess being alternately juxtaposed in a height direction, the bump having a width greater than a width of the recess.

13. The energy storage device of claim 1, wherein the housing is configured as a multi-layer structure comprising a first layer and a second layer sequentially arranged along a wall thickness direction of the housing, the first layer and the second layer are both made of glass fiber reinforced plastic, a cavity is formed between the first layer and the second layer, and gas is filled in the cavity.

14. The energy storage device of claim 1, wherein the housing comprises a first housing forming the first receiving cavity and a second housing forming the second receiving cavity.

15. The energy storage device of claim 14, wherein the second housing comprises a cabinet and a cover assembly, the top end opening of the cabinet being disposed, the cover assembly being openably and closably connected to the cabinet.

16. The energy storage device of claim 1, wherein the top and/or bottom end of the housing is provided with a stiffening ring.

17. The energy storage device of claim 1, wherein the control module comprises at least one of a BMS, a PCS, a power distribution module, and a bussing module.

18. An energy storage system, characterized in that it comprises at least one energy storage device according to any one of claims 1-17.