Energy storage system

Abstract

The utility model provides an energy storage system. The energy storage system comprises a supporting frame; at least two mounting frames and bearing plate frames, the at least two mounting frames are arranged in the height direction of the supporting frame, and any bearing plate frame is correspondingly arranged on one mounting frame; the battery module is arranged on the bearing plate frame; the battery module comprises a coating structure and a battery stack body, and the coating structure coats at least part of the battery stack body; the battery stack body comprises a plurality of battery monomers, and one side, provided with the terminal, of each battery monomer is exposed relative to the coating structure; according to the application, at least part of the battery stack body is wrapped by the wrapping structure, and the covered battery stack body is reinforced and extruded, so that the plurality of battery monomers of the battery stack body are distributed more compactly; and the sides, provided with the terminals, of the battery monomers are exposed relative to the coating structure, so that the space occupied by the battery module can be reduced, the arrangement number of the battery monomers can be increased in the same space, and the energy density and the energy storage capacity of the energy storage system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to an energy storage system. BACKGROUND

[0002] With the continuous progress and development of science and technology, energy storage technology has gradually become one of the focuses of social attention, especially under the background of the wide application of renewable energy, the importance of energy storage system is increasingly prominent. At present, the common energy storage system includes an energy storage cabinet and a plurality of battery stacks, which realizes effective storage and release of electric energy in combination with the design concept of modularity. For the current energy storage system, the layout of the battery stacks in the energy storage cabinet is relatively complex, which increases the assembly flexibility of the energy storage system and the maintenance difficulty of the internal components, and also reduces the accommodation capacity of the energy storage cabinet for the battery stacks, thereby affecting the energy density and storage capacity of the energy storage system. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application aims to provide an energy storage system to solve the above-mentioned partial or all technical problems.

[0004] In order to achieve the above-mentioned purpose, the present application provides an energy storage system, which comprises:

[0005] a support frame;

[0006] at least two mounting frames arranged along the height direction of the support frame, and a support plate frame corresponding to each mounting frame;

[0007] a battery module arranged in the support plate frame; the battery module comprises a cladding structure and a battery stack, the cladding structure cladding at least part of the battery stack; the battery stack comprises a plurality of battery monomers, and the side of the battery monomer provided with a terminal is exposed relative to the cladding structure.

[0008] As can be seen from the above, the energy storage system provided by the present application comprises a cladding structure and a battery stack, and the battery stack comprises a plurality of battery monomers. By cladding at least part of the battery stack with the cladding structure, the cladding structure can reinforce and extrude the battery stack, improve the firmness of the battery module installed in the support plate frame, so that the battery monomers are tightly arranged and compactly distributed. At the same time, by exposing the side of the battery monomer provided with a terminal relative to the cladding structure, the heat dissipation effect of the battery module can be improved, the battery module can be conveniently connected and assembled, and the space occupied by the battery module can be reduced, which is conducive to increasing the arrangement number of battery monomers in the same space, thereby improving the energy density and energy storage capacity of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0010] Figure 1 It is a structural schematic diagram of the energy storage system in the present application.

[0011] Figure 2 It is a structural schematic diagram of the first battery module in the present application.

[0012] Figure 3 It is an exploded view of the first battery module in the present application.

[0013] Figure 4 It is a structural schematic diagram of the first battery module and the support plate frame in the present application.

[0014] Figure 5 It is a structural schematic diagram of the second battery module in the present application.

[0015] Figure 6 It is a combined schematic diagram of the second battery module in the present application.

[0016] Figure 7 It is a structural schematic diagram of the third battery module in the present application.

[0017] Figure 8 It is a structural schematic diagram of the third battery module and the support plate frame in the present application.

[0018] Figure 9 It is a positional relationship between the thinning area and the explosion-proof valve of the third cold plate in the present application.

[0019] Figure 10 It is a use state diagram of the energy storage system in the present application.

[0020] Explanation of reference signs:

[0021] 100, support frame;

[0022] 200, mounting frame;

[0023] 300, support plate frame;

[0024] 400, battery module; 410, cladding structure; 4111, first end plate; 4112, side plate; 4121, second end plate; 4122, cable tie; 420, battery stack; 4201, terminal; 4202, explosion-proof valve;

[0025] 510, first cold plate; 520, second cold plate; 530, third cold plate; 531, thinning area; 541, first port; 542, second port;

[0026] 610, partition plate; 620, skin; 630, gasket. DETAILED DESCRIPTION

[0027] For the purposes of the present application, the technical solutions and advantages thereof are more clearly apparent, the following further describes the present application in detail with reference to the specific embodiments and with reference to the accompanying drawings.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood as the common meanings thereof by those having ordinary skills in the art to which the present application pertains. The terms "first", "second", and similar terms used in the present application do not represent any order, number, or importance, but are only used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms "connect" or "connected" and similar terms do not mean physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like only represent relative positional relationships, which can change when the absolute positions of the described objects change.

[0029] Generally, the energy storage system includes an energy storage cabinet and a plurality of battery stacks, which are used to effectively store and release electric energy, so as to flexibly adjust the power supply according to the specific power consumption demand of the user, alleviate the contradiction between power supply and demand, and thus improve the energy utilization efficiency. In terms of the energy storage system, the internal layout of the battery stacks in the energy storage cabinet is relatively complicated. Due to the limited internal space of the energy storage cabinet, the complicated layout not only increases the flexibility of the assembly of the battery stacks and the difficulty of the maintenance of the internal components, but also restricts the rationality of the distribution of the battery stacks in the energy storage cabinet, reduces the accommodating capacity of the energy storage cabinet for the battery stacks, and affects the energy density and storage capacity of the energy storage system.

[0030] In addition, for the battery stack, the battery stack is usually composed of a plurality of battery monomers. Before the battery stack is assembled into the inside of the energy storage cabinet, a cladding shell needs to be formed on the surface of the battery stack, and the battery stack is fixed through the cladding shell, so that the battery stack can be assembled into the inside of the energy storage cabinet in batches, so as to achieve the shielding and protection of the battery stack, so as to achieve the effect of dustproof and / or waterproof (for example, the protection level of the energy storage system reaches IP67). However, when the energy storage system is running, that is, when the battery stack in the energy storage cabinet is charging and discharging, the terminals of the battery monomers are used as input terminals or output terminals. At this time, the area of the terminal of the battery monomer generates a large amount of heat. Due to the limitation of the cladding shell, the heat generated by the terminal of the battery monomer is difficult to dissipate, which causes the heat to accumulate near the terminal and the temperature to rise, which affects the storage and release effect of the battery stack on the electric energy, and further affects the overall performance of the energy storage system.

[0031] Therefore, the present application provides an energy storage system, which comprises a support frame 100, at least two mounting frames 200 and a supporting plate frame 300. The at least two mounting frames 200 are arranged along the height direction of the support frame 100, and any supporting plate frame 300 is arranged on a mounting frame 200. The energy storage system further comprises a battery module 400 arranged on the supporting plate frame 300. The battery module 400 comprises a cladding structure 410 and a battery stack 420, and the cladding structure 410 clads at least part of the battery stack 420. The battery stack 420 comprises a plurality of battery monomers, and one side of the battery monomer provided with a terminal 4201 is exposed relative to the cladding structure 410.

[0032] Specifically, please refer to Figure 1 and Figure 10 , Figure 1 for the structural schematic diagram of the energy storage system in the present application, Figure 10 for the use state diagram of the energy storage system in the present application.

[0033] The present application provides an energy storage system with good energy storage performance. As Figure 1 and Figure 10As shown, the energy storage system can include a support frame 100, a mounting frame 200, and a support plate frame 300, wherein the mounting frame 200 is provided with at least two, the at least two mounting frames 200 are arranged along the height direction of the support frame 100, and the support frame 100 serves as a mounting carrier of the mounting frame 200, so as to support the at least two mounting frames 200 through the support frame 100, and the at least two mounting frames 200 are arranged in layers along the height direction of the support frame 100, which is beneficial to reasonably distribute the internal space of the mounting frame 200; in addition, the support frame can be provided with at least two support plate frames 300, and each support plate frame 300 can be correspondingly arranged on a mounting frame 200, so as to form a plurality of mounting positions in the vertical direction of the support frame 100 inside the support frame 100, thereby improving the utilization efficiency of the internal space of the support frame 100.

[0034] Exemplarily, the support plate frame 300 and the mounting frame 200 can be connected in a sliding manner, which is beneficial to the taking out and placing of the support plate frame 300; when the battery module 400 is mounted by using the support plate frame 300, the battery module 400 can be mounted above the support plate frame 300, and then the support plate frame 300 is driven to slide on the mounting frame 200, so that the support plate frame 300 enters the inside of the support frame 100, thereby achieving the mounting of the battery module 400; after the support plate frame 300 is placed in the inside of the support frame 100, the support plate frame 300 can be fixed to the mounting frame 200 by means of bolting or bonding, so as to improve the firmness and reliability of the fixation between the two.

[0035] The energy storage system further includes a battery module 400 arranged on the support plate frame 300; as shown, Figure 1 As shown, the support plate frame 300 serves as a support carrier of the battery module 400, and the battery module 400 can be assembled in the inside of the support frame 100; as for the battery module 400, the battery module 400 can include a cladding structure 410 and a battery stack 420, the battery stack 420 can include a plurality of battery cells, so as to constitute a storage unit and a release unit of electric energy by means of the plurality of battery cells; the cladding structure 410 clads at least part of the battery stack 420, can reinforce, extrude and protect the battery cells in the battery stack 420, and can arrange the plurality of battery cells in close contact with each other, thereby improving the compactness of the overall battery stack 420 arranged on the support plate frame 300, and being beneficial to increasing the number of battery cells in the battery module 400.

[0036] In addition, for the battery stack 420, by arranging the side of the battery stack 420 provided with the terminal 4201 to be exposed relative to the cladding structure 410, the complexity of the battery module 400 is reduced, the mounting difficulty of the battery stack 420 in the support plate frame 300, the wiring of the terminal 4201 in the battery stack 420, and the difficulty of later maintenance are reduced; when the battery module 400 is charging and discharging, since the battery monomer is arranged to be exposed relative to the cladding structure 410, the heat dissipation speed is improved, and the high temperature of the terminal 4201 of the battery monomer does not affect the charging and discharging performance of the battery module 400. In addition, since the side of the battery monomer provided with the terminal 4201 is arranged to be exposed relative to the cladding structure 410, that is, the side of the battery monomer provided with the terminal 4201 does not need to be wrapped, the space occupied by the cladding structure 410 inside the support frame 100 can be reduced, so that the number of battery monomers in the battery stack 420 can be increased under the same space, and the energy density and storage capacity of the energy storage system are further improved.

[0037] The mounting frame 200 is further described in combination with the above embodiments; for example, the mounting frame 200 can include two longitudinal beams which can be connected to opposite sides in the support frame 100 by bolting or welding to support the support plate frame; in addition, the mounting frame 200 can also include at least one cross beam, the two ends of the cross beam can be fixedly connected with the cross beam, which can assist the longitudinal beam to support the support plate frame 300; wherein the longitudinal beam can be formed of angle steel or the like, and the cross beam can be formed of a plate beam, and the two can be connected by bolting or welding, which will not be described here.

[0038] In addition, as shown in Figure 10 The energy storage system also includes a skin 620 covering the outer surface of the support frame 100, which can shield and protect the battery module 400 inside, and has the functions of dustproof and light shielding, which will not be described here.

[0039] In some embodiments, the side of the battery monomer provided with the terminal 4201 is arranged parallel to the height direction of the support frame 100, and the cladding structure 410 includes two first end plates 4111 and a side plate 4112; the two first end plates 4111 are arranged on opposite sides of the battery stack 420, respectively; the side plate 4112 is arranged on the side of the battery stack 420 away from the support plate frame 300; and the side plate 4112 is connected with the two first end plates 4111, respectively.

[0040] Specifically, referring to Figure 2 and Figure 5 , Figure 2 for the Figure 2 for the first battery module 400 in the present application, Figure 5The second battery module 400 is shown in the structure diagram.

[0041] For the battery module 400, the battery module 400 can include a battery stack 420 and a cladding structure 410 cladded on at least part of the surface of the battery stack 420; as shown in Figure 2 and Figure 5 As shown, by arranging the side of the side of the battery monomer with the terminal 4201 in the battery stack 420 parallel to the height direction of the support frame 100, that is, arranging the side of the battery monomer with the terminal 4201 toward the side of the support frame 100, the high temperature generated when the side of the battery monomer with the terminal in the battery stack 420 has thermal runaway is avoided from affecting the battery module 400 above, which is conducive to improving the safety of the energy storage system and reducing the loss when the energy storage system has thermal runaway.

[0042] For the cladding structure 410, the cladding structure 410 can include two first end plates 4111 and a side plate 4112; as shown in Figure 2 and Figure 5 As shown, the two first end plates 4111 can be arranged on the opposite sides of the battery stack 420, respectively, for reinforcing, extruding and limiting the battery monomers on the opposite sides of the battery stack 420, so that the battery monomers in the battery stack 420 are tightly attached to each other and the compactness is improved; the side plate 4112 is arranged on the side of the battery stack 420 away from the support plate frame 300, and the side plate 4112 can be perpendicular to and connected to the first end plate 4111, cooperating with the two first end plates 4111 and the support plate frame 300 to surround the battery stack 420 and press and reinforce the side of the battery stack 420 away from the support plate frame 300, thereby improving the compactness and orderliness between the plurality of battery monomers.

[0043] It should be noted that, in order to improve the firmness and stability of the battery module 400 on the support plate frame 300, the battery stack 420 in the battery module 400 can be fixedly connected to the support plate frame 300 by bonding, such as using glue or double-sided tape; at the same time, the first end plate 4111 in the cladding structure 410 can be formed of metal, plastic or composite material, and can be made by extrusion, die casting, injection molding or stamping process, and can be connected to the support plate frame 300 by bonding or bolting when reinforcing the battery stack 420; in addition, the side plate 4112 can be formed of metal or composite material, and can be made by stamping or extrusion process, which will not be described here.

[0044] In some embodiments, the battery monomer is a square shell battery, and the side of the battery stack 420 away from the terminal 4201 is provided with a first cold plate 510, and the first cold plate 510 is perpendicular to the first end plate 4111 and the side plate 4112, respectively.

[0045] Specifically, refer to Figures 2-4 , Figure 2 is a structural schematic diagram of the first battery module 400 in the present application, Figure 3 is an exploded view of the first battery module 400 in the present application, Figure 4 is a structural schematic diagram of the first battery module 400 and the support plate frame 300 in the present application.

[0046] As for the battery module 400, the battery module 400 can include a battery stack 420 composed of a plurality of square shell batteries; as Figures 2-4 shown, when the battery monomer is a square shell battery with a relatively regular shape, the battery stack 420 can be reinforced, extruded and limited by the first end plate 4111 and the side plate 4112 in the cladding structure 410, thereby improving the compactness of the battery stack 420; the battery stack 420 will generate heat and cause the temperature of the battery stack 420 to rise when charging or discharging, so by setting the first cold plate 510 on the side of the battery stack 420 away from the terminal 4201, the cooling effect of the first cold plate 510 can cool the battery stack 420, speed up the heat dissipation speed of the battery stack 420, and also will not affect the normal wiring of the battery stack 420, which is beneficial to improve the overall performance of the battery stack 420, and can realize the reasonable arrangement of the battery module 400 in the support frame 100.

[0047] In addition, as Figure 3 shown, the inside of the first cold plate 510 can be provided with a medium channel (not marked in the figure), and the outer side wall is provided with at least one first port 541 and at least one second port 542, the first port 541 and the second port 542 are respectively communicated with the opposite ends of the medium channel, one of them is a liquid inlet port, and the other is a liquid outlet port, so as to take away the heat generated by the battery stack 420 through the cooling medium flowing in the medium channel; further, at least one of the two first end plates 4111 can be provided with a groove, and the first port 541 and the second port 542 of the first cold plate 510 are embedded in the groove, thereby improving the firmness and stability of the first cold plate 510 in the battery module 400.

[0048] In some embodiments, any battery module 400 includes two battery stacks 420; the battery monomers of the two battery stacks 420 are arranged on opposite sides of the terminal 4201, and the first cold plate 510 is arranged between the two battery stacks 420.

[0049] As for the battery module 400, when the battery monomer constituting the battery stack 420 is a square shell battery, any one battery module 400 can include two battery stacks 420; asFigure 1 and Figure 4 As shown in FIG. 13, for two battery stacks 420 in the same battery module 400, when the battery monomer is a square shell battery, by arranging the two battery stacks 420 with the side of the battery monomer provided with the terminal 4201 facing in opposite directions, the short circuit problem of the two battery stacks 420 can be prevented, and the complexity of wiring of the battery stack 420 is reduced to prevent the occurrence of new situations such as misconnection or wiring confusion.

[0050] In addition, since the first cold plate 510 is arranged on the side of the battery stack 420 away from the terminal 4201, the two battery stacks 420 with the side of the battery monomer provided with the terminal 4201 arranged in opposite directions, the two adjacent battery stacks 420 in the battery module 400 can share the same first cold plate 510, that is, one first cold plate 510 is used to cool two battery stacks 420 at the same time, which is beneficial to improve the cooling efficiency of the first cold plate 510, reduce the cost investment of the battery module 400, and further improve the compactness of the distribution of the battery stack 420.

[0051] In some embodiments, any support plate frame 300 is provided with at least two battery modules 400, and the at least two battery modules 400 are arranged side by side, and a partition plate 610 is arranged between the two adjacent battery modules 400.

[0052] As for the support plate frame 300, any support plate frame 300 can be provided with one battery module 400, or two or more battery modules 400; as Figure 4 As shown in FIG. 14, when the support plate frame 300 is provided with two or more battery modules 400 arranged side by side, the side of the battery monomer provided with the terminal 4201 in the battery module 400 can be arranged parallel to the height direction of the support frame 100; therefore, when the two adjacent battery modules 400 are arranged side by side, in order to avoid the short circuit problem of the battery stack 420 in the battery module 400, a partition plate 610 can be arranged between the two adjacent battery modules 400 to block the two battery modules 400, which not only can prevent the short circuit of the two battery modules 400 and improve the safety of the battery module 400, but also can play a heat insulation role to avoid the influence of the thermal runaway of the battery stack 420 on the surrounding battery stacks 420.

[0053] It should be noted that the partition plate 610 is further described in combination with the above embodiments, and the partition plate 610 can be formed of a material such as potting glue or plastic having good insulation and heat insulation properties, so as to avoid the problem of heat accumulation of the battery module 400 leading to thermal runaway of the battery module 400, which will not be described here.

[0054] It should be noted that the battery stack 420 is further described in combination with the above-mentioned embodiments. Since the battery stack 420 can be composed of a plurality of square cell batteries, and the side of the battery monomer with the terminal 4201 is parallel to the height direction of the support frame 100, when a plurality of battery stacks 420 are arranged side by side, the terminals 4201 opposite to each other of the adjacent two battery modules 400 are shielded, thereby increasing the wiring difficulty of the battery stack 420. Therefore, for any battery stack 420, the terminals 4201 between a plurality of battery monomers can be electrically connected through the bar sheet 630, and the bar sheet 630 located at the end of the battery monomer terminal 4201 can be exposed and arranged, which is convenient for wiring and heat dissipation of the battery stack 420. At the same time, the bar sheet 630 can also be surrounded and tightly protected by the sealing glue or other insulating parts, so as to play an electrical insulation role on the battery monomer.

[0055] In some embodiments, the battery monomer is a blade battery; the second cold plate 520 is arranged on the side of the battery stack 420 close to the support plate frame 300, and the second cold plate 520 is perpendicular to the first end plate 4111 and parallel to the side plate 4112.

[0056] Specifically, referring to Figure 5 and Figure 6 , Figure 5 is a structural schematic diagram of a second battery module 400 in the present application, Figure 6 is a combined schematic diagram of a plurality of second battery modules 400 in the present application.

[0057] As for the battery module 400, the battery module 400 can also be composed of a battery stack 420 including a plurality of blade batteries; since the blade battery is a long strip structure, the terminal 4201 used as its electrode is usually located at the end thereof, so that the side of the battery monomer provided with the terminal 4201 can be arranged parallel to the height direction of the support frame 100, and a plurality of single blade battery monomers can be arranged side by side, which is beneficial to increase the number of blade batteries in the battery stack 420; when the cladding structure 410 clads at least part of the battery stack 420, the battery stack 420 can be reinforced and extruded by the first end plate 4111 and the side plate 4112 located at the opposite ends of the battery stack 420, so as to tightly arrange each blade battery and improve the compactness thereof; as Figure 5 and Figure 6As shown, the second cold plate 520 can be arranged on the side of the battery stack 420 close to the support plate frame 300, which is perpendicular to the first end plate 4111 and parallel to the side plate 4112. By arranging the second cold plate 520, on the one hand, the second cold plate 520 can increase the supporting effect of the support plate frame 300 on the blade battery, and on the other hand, the second cold plate 520 can be used to cool the battery stack 420, reduce the temperature of the battery stack 420 during use, and improve the overall performance of the battery stack 420, thereby improving the energy storage capacity of the energy storage system.

[0058] In some embodiments, any support plate frame 300 is provided with at least two battery modules 400, and the at least two battery modules 400 are arranged in layers. The second cold plate 520 is arranged between the adjacent two battery modules 400.

[0059] In terms of energy storage systems, when the battery module 400 is composed of a battery stack 420 composed of a plurality of blade batteries, at least two battery modules 400 can be arranged in the support plate frame 300 to increase the number of battery arrangements and improve the energy storage capacity. For example, Figure 6 As shown, when the support plate frame 300 is provided with two or more battery modules 400, the plurality of battery modules 400 can be arranged in layers along the height direction of the support frame 100, which is beneficial to increase the number of battery monomers in the battery stack 420 and improve the rationality of space allocation in the support frame 100. At this time, for example, Figure 6 As shown, for the second cold plate 520, the second cold plate 520 can be arranged between the adjacent two battery modules 400, so that the two opposite sides of the second cold plate 520 are in contact with the two battery stacks 420 respectively. By using the second cold plate 520, the adjacent two battery stacks 420 can be cooled at the same time, which is beneficial to improve the cooling efficiency of the second cold plate 520, reduce the cost investment of the battery module 400, and further improve the compactness of the battery stack 420 distribution.

[0060] In some embodiments, the side of the battery monomer provided with the terminal 4201 is arranged perpendicular to the height direction of the support frame 100, and the cladding structure 410 includes two second end plates 4121 and a cable tie 4122. The two second end plates 4121 are arranged on the opposite sides of the battery stack 420 respectively. The cable tie 4122 is arranged around the battery stack 420 and the second end plate 4121.

[0061] Specifically, referring to Figure 7 and Figure 8 , Figure 7 is a structural schematic diagram of the third battery module 400 in the present application, Figure 8 is a structural schematic diagram of the third battery module 400 and the support plate frame 300 in the present application.

[0062] As for the battery module 400, since the battery stack 420 includes a plurality of battery cells, by arranging the side of the battery cell with the terminal 4201 vertically to the height direction of the support frame 100, the terminals 4201 of the plurality of battery cells in the battery stack 420 can be located in the plane, which is beneficial to the wiring of the battery stack 420, and reduces the wiring difficulty of the battery stack 420; in this state, the cladding structure 410 in the battery module 400 can reinforce, extrude and fold the battery stack 420, so that the battery cells in the battery stack 420 are closely arranged, thereby improving the dense layer degree; as shown in Figure 7 and Figure 8 The cladding structure 410 can include two end plates and a strap 4122, which can be provided with one or at least two according to actual needs, and the second end plate 4121 can be used to reinforce and press the battery cells on the opposite sides of the battery stack 420, so that the plurality of battery cells are arranged in order, and the strap 4122 is used in combination and arranged around the battery cells and the end plate of the battery stack 420, for binding the plurality of battery cells together, thereby improving the compactness and orderliness of the battery stack 420.

[0063] It should be noted that, in order to improve the firmness and stability of the battery module 400 on the support plate frame 300, the battery stack 420 in the battery module 400 can be fixedly connected to the surface of the second cold plate 520 by bonding, such as using glue or double-sided tape; at the same time, the second end plate 4121 in the cladding structure 410 can be formed of metal, plastic or composite material, and can be made by extrusion, die casting, injection molding or stamping process, and can be connected with the support plate frame 300 by bonding or bolting when reinforcing the battery stack 420; the strap 4122 can be formed of a composite material with good insulation and heat resistance, and can be formed into a ring structure by bonding or hot melt fixation to bind the battery stack 420 and the end plate, which will not be described here.

[0064] In some embodiments, the battery cell is a square cell; a third cold plate 530 is provided between the battery stack 420 and the support plate frame 300, and the third cold plate 530 is provided on the side of the battery stack 420 away from the terminal 4201 and perpendicular to the second end plate 4121.

[0065] As for the battery module 400, the battery module 400 can include a battery stack 420 composed of a plurality of square cells, and the second end plate 4121 and the strap 4122 of the cladding structure 410 are used in combination to bind and reinforce the battery stack 420 by the cladding structure 410; as shown in Figures 7-8As shown, since the battery stack 420 generates heat during charging or discharging, the overall temperature of the battery stack 420 rises and affects its overall performance; therefore, by arranging the third cold plate 530 on the side of the battery stack 420 away from the terminal 4201, that is, arranging the third cold plate 530 between the battery stack 420 and the support plate frame 300, not only can the support effect of the support plate frame 300 on the battery stack 420 be increased, but also the battery stack 420 can be cooled by the third cold plate 530 without affecting the normal wiring of the battery stack 420, which is conducive to the reasonable arrangement of the battery module 400 inside the support frame 100.

[0066] In some embodiments, the third cold plate 530 is provided with a thinned area 531 on the side close to the support plate frame 300; the side of the battery monomer provided with the terminal 4201 is also provided with an explosion-proof valve 4202, and the explosion-proof valve 4202 is arranged opposite to the thinned area 531 of the third cold plate 530 located above the explosion-proof valve 4202.

[0067] As for the battery monomer, in addition to the terminal 4201, the side of the battery monomer is also provided with an explosion-proof valve 4202, that is, the terminal 4201 and the explosion-proof valve 4202 are arranged on the same side, and the explosion-proof valve 4202 can release the gas inside the battery monomer to realize the regulation of the internal pressure and temperature of the battery; when the battery monomer appears thermal runaway, the temperature of the battery monomer itself and its surroundings will rise, and the explosion-proof valve 4202 is difficult to regulate; in particular, as shown, Figure 9 As shown, by arranging the thinned area 531 on the side of the third cold plate 530 close to the support plate frame 300, the thinned area 531 can be broken in high temperature, at this time the cooling medium in the third cold plate 530 flows out from the broken part of the thinned area 531, and the cooling medium can directly act on the area where the explosion-proof valve 4202 of the battery monomer with thermal runaway is located, avoiding fire and other disasters caused by thermal runaway of the battery monomer, improving the overall safety of the energy storage system, and reducing the loss degree of the energy storage system.

[0068] Further, the first cold plate 510, the second cold plate 520 and the third cold plate 530 can be cooled by liquid cooling. Specifically, in addition to the first cold plate 510, the second cold plate 520 and the third cold plate 530 can each be provided with a medium channel (not shown in the figure) in the interior thereof, and at least one first port 541 and at least one second port 542 are arranged on the outer wall of the medium channel. The first port 541 and the second port 542 are respectively in communication with opposite ends of the medium channel, one of which is a liquid inlet port and the other is a liquid outlet port, so that the heat generated by the battery stack 420 can be taken away by the cooling medium flowing through the medium channel.

[0069] Further, the first cold plate 510, the second cold plate 520 and the third cold plate 530 can be cooled by liquid cooling. Specifically, in addition to the first cold plate 510, the second cold plate 520 and the third cold plate 530 can each be provided with a medium channel (not shown in the figure) in the interior thereof, and at least one first port 541 and at least one second port 542 are arranged on the outer wall of the medium channel. The first port 541 and the second port 542 are respectively in communication with opposite ends of the medium channel, one of which is a liquid inlet port and the other is a liquid outlet port, so that the heat generated by the battery stack 420 can be taken away by the cooling medium flowing through the medium channel.

[0070] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the acts or steps recited in the claims can be performed in an order other than that described above and still achieve desirable results. Also, the processes depicted in the figures do not necessarily require the particular order shown or sequential order to achieve desirable results. In certain implementations, multitasking and parallel processing can be advantageous.

[0071] Each of the embodiments in the present application is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0072] The description of the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the present application and its practical application, and to enable others skilled in the art to understand the present application in order to design various embodiments with various modifications for specific use cases.

[0073] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and not intended to limit the scope of the application (including the claims) in any way. In fact, various modifications, substitutions, and changes can be suggested by the principles set forth in the application, and they are intended to fall within the scope of the application. The steps in the above embodiments or technical features among different embodiments can be implemented in any order, and there are many other changes to the aspects of the embodiments of the application as described above, which will be apparent to those skilled in the art. For the sake of brevity, they are not provided in detail.

[0074] Although the application has been described in conjunction with the specific embodiments thereof, it is to be understood that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description.

[0075] The embodiments of the present application are intended to cover all such alternatives, modifications and variations as falling within the scope of the appended claims. Accordingly, any omission, modification, equivalent replacement, improvement, etc. made in the spirit and principle of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. An energy storage system, characterized by, The application relates to a battery module and a battery module assembly. The battery module assembly comprises a support frame, at least two mounting frames arranged along the height direction of the support frame, and a plurality of support plate frames corresponding to the mounting frames. The battery module comprises a cladding structure and a battery stack, the cladding structure cladding at least part of the battery stack, and the battery stack comprising a plurality of battery cells, one side of the battery cells provided with terminals being exposed relative to the cladding structure. The one side of the battery cells provided with the terminals is parallel to the height direction of the support frame, and the cladding structure comprises two first end plates arranged on opposite sides of the battery stack, and a side plate arranged on the side of the battery stack away from the support plate frame and connected with the two first end plates.

2. The energy storage system of claim 1, wherein, The battery cells are square shell batteries, and the battery stack is provided with a first cold plate on the side away from the terminals, the first cold plate being perpendicular to the first end plates and the side plate. Any battery module comprises two battery stacks, and the one sides of the battery cells of the two battery stacks provided with the terminals are arranged opposite to each other, and the first cold plate is arranged between the two battery stacks. Any support plate frame is provided with at least two battery modules, the at least two battery modules are arranged side by side, and a partition plate is arranged between adjacent two battery modules.

3. The energy storage system of claim 2, wherein, The battery cells are blade batteries, and the battery stack is provided with a second cold plate on the side close to the support plate frame, the second cold plate being perpendicular to the first end plates and parallel to the side plate.

4. The energy storage system of claim 3, wherein, Any support plate frame is provided with at least two battery modules, the at least two battery modules are arranged in layers, and the second cold plate is arranged between adjacent two battery modules.

5. The energy storage system of claim 2, wherein, The one side of the battery cells provided with the terminals is perpendicular to the height direction of the support frame, and the cladding structure comprises two second end plates arranged on opposite sides of the battery stack, and a cable tie arranged around the battery stack and the second end plates.

6. The energy storage system of claim 2, wherein, The battery cells are square shell batteries, and the battery stack is provided with a third cold plate between the battery stack and the support plate frame, the third cold plate being arranged on the side of the battery stack away from the terminals and perpendicular to the second end plates.

7. The energy storage system of claim 6, wherein, The third cold plate is provided with a thinned area on the side close to the support plate frame, and the one side of the battery cells provided with the terminals is further provided with an explosion-proof valve, the explosion-proof valve being arranged opposite to the thinned area of the third cold plate above the explosion-proof valve.

8. The energy storage system of claim 1, wherein, ​ ​ ​ 9. The energy storage system of claim 8, wherein, ​ 10. The energy storage system of claim 9, wherein, ​

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