Air-cooled energy storage system

Abstract

An air-cooled energy storage system disclosed by the present invention comprises a box body, a battery rack and a plurality of battery modules, the battery rack is arranged in the box body and is provided with a plurality of battery cavities, the plurality of battery cavities are arranged at intervals along the left-right direction of the box body, and each battery cavity is provided with a plurality of battery mounting positions arranged up and down; an air inlet channel extending in the vertical direction is formed in the position, between every two adjacent battery cavities, of the battery rack, partition structures are arranged between the air inlet channel and the two adjacent battery cavities, and at least one partition structure is provided with a hollow area corresponding to each battery installation position. The hollowed-out areas of the plurality of hollowed-out areas are integrally increased from top to bottom, and each battery module is arranged at one battery mounting position. According to the technical scheme, the heat dissipation uniformity can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, and in particular to an air-cooled energy storage system. Background Art

[0002] In energy storage systems, a heat dissipation system is usually set up to quickly dissipate the heat generated by the energy storage system when it is working to the outside world. Currently, there are two common heat dissipation methods: air cooling and liquid cooling. Among them, when air cooling is used, the refrigeration device or air supply device is generally set at the top position so that the airflow flows from top to bottom to each battery pack. However, in actual operation, a larger part of the airflow will enter the upper battery pack, while less airflow will flow to the lower battery pack, resulting in uneven heat dissipation. Summary of the invention

[0003] The main purpose of the present invention is to provide an air-cooled energy storage system to improve heat dissipation uniformity.

[0004] To achieve the above object, the air-cooled energy storage system proposed in the present invention comprises:

[0005] Box;

[0006] A battery rack is disposed in the box body and has a plurality of battery cavities, the plurality of battery cavities are arranged at intervals along the left-right direction of the box body, the battery cavity has a plurality of battery installation positions arranged up and down, the battery rack forms an air inlet channel extending in the up and down direction between two adjacent battery cavities, a partition structure is provided between the air inlet channel and the two adjacent battery cavities, and at least one of the partition structures is provided with a hollow area corresponding to each battery installation position, and the hollow areas of the plurality of hollow areas tend to increase from top to bottom as a whole; and

[0007] A plurality of battery modules, each of which is arranged at one of the battery installation positions.

[0008] Optionally, the barrier structure includes a plurality of mutually independent partitions, each of which is arranged corresponding to one of the battery installation positions and is provided with the hollow area.

[0009] Optionally, at least part of the hollow area is provided with a plurality of first vents, and the plurality of first vents are spaced apart from each other.

[0010] Optionally, among the plurality of hollow areas, one or more of the hollow areas close to the bottom of the box body is provided with a second vent.

[0011] Optionally, the air-cooled energy storage system further includes a refrigeration device having an air inlet, an air outlet, and a heat exchange air duct connected between the air inlet and the air outlet, and the air outlet is connected to the upper end of the air inlet duct.

[0012] Optionally, a box door is provided on the opening side of the box body corresponding to the battery cavity, and a return air channel is provided between the battery rack and the box door, and the return air channel is located between the air inlet channel and the air inlet.

[0013] Optionally, the battery module comprises a shell and a battery pack arranged in the shell, a side of the shell is provided with a heat dissipation inlet connected to the air inlet channel, and a side of the shell facing the box door is provided with a heat dissipation outlet;

[0014] Optionally, the battery module further includes a cooling fan, which is disposed at the cooling outlet to discharge the airflow in the housing toward the return air channel.

[0015] Optionally, the top of the battery rack is spaced from the top plate of the box body to form an installation cavity, and the air-cooled energy storage system also includes a plurality of air guide shells, which are detachably installed in the installation cavity and arranged along the left-right direction, and the air guide shells have an inlet and a plurality of outlets, and the plurality of outlets are located at the bottom of the air guide shell, each of the outlets corresponds to an air inlet channel, and the inlet is connected to the air outlet.

[0016] Optionally, each of the air guide shells is arranged above two adjacent battery cavities, the mutually close outlets on the two adjacent air guide shells correspond to the same air inlet channel, and the inlet is located in the middle of the air guide shell in the left-right direction.

[0017] Optionally, the box body is divided into two installation areas in the front-to-back direction, the two installation areas are symmetrically distributed, the battery rack is provided with a plurality of battery cavities corresponding to each installation area, and the plurality of battery cavities in the same installation area are arranged at intervals along the left-to-right direction.

[0018] The technical solution of the present invention is to set a plurality of battery cavities on the battery rack so that the plurality of battery cavities are arranged at intervals along the left-right direction of the box body, and an air inlet channel extending in the up-down direction is formed between two adjacent battery cavities, and a partition structure is provided between the air inlet channel and the two adjacent battery cavities, and at least one partition structure is provided with a hollow area corresponding to each battery mounting position, and the hollow areas of the plurality of hollow areas gradually increase from top to bottom. With such a setting, the ventilation volume of the upper hollow area can be limited, that is, the air intake volume of the upper battery mounting position can be limited, so that the cold air flow of the air inlet channel can fully flow to the lower position, avoiding the situation where most or all of the cold air flow enters the upper battery mounting position, resulting in a reduction in the cold air flow entering the lower battery mounting position, ensuring that the cold air flow inflow of the multiple battery mounting positions of the same mounting cavity is relatively balanced, and the heat dissipation uniformity can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of an air-cooled energy storage system of the present invention;

[0021] Figure 2 for Figure 1 A cross-sectional view of a medium-cooled energy storage system;

[0022] Figure 3 for Figure 1 Schematic diagram of the internal structure of the air-cooled energy storage system;

[0023] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0024] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0025] Figure 6 for Figure 3 Schematic diagram of the structure of the middle air guide shell;

[0026] Figure 7 for Figure 3 Schematic diagram of the structure of the battery module;

[0027] Figure 8 for Figure 7 A schematic diagram of the split mounting plate on the middle battery module;

[0028] Fig. 9 for Figure 8 Schematic diagram of the structure inside the middle mounting plate;

[0029] Fig.10 for Figure 7 Front view of the middle battery module;

[0030] Fig.11 for Fig.10 Sectional view at XX in the middle;

[0031] Fig.12 for Fig.10 Cross-sectional view at point YY in the figure.

[0032] Description of Figure Numbers:

[0033] 1. Box body; 11. Box door; 12. Return air channel; 13. Installation cavity; 2. Battery rack; 21. Battery cavity; 22. Air inlet channel; 23. First column; 24. Second column; 25. Partition structure; 251. Hollow area; 2511. First ventilation hole; 2512. Second ventilation hole; 3. Refrigeration device; 31. Air inlet; 32. Air outlet; 4. Air guide shell; 41. Inlet; 42. Outlet vent; 5. air guide tube; 6. limiter; 7. battery module; 71. housing; 711. front panel; 7111. fixing plate; 7112. mounting hole; 7113. mounting plate; 7114. through hole; 712. housing; 7121. heat dissipation inlet; 73. cover plate; 74. battery pack; 741. single cell; 742. protective plate; 75. cooling fan; 76. battery management module; 77. handle.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The present invention provides an air-cooled energy storage system.

[0039] In the embodiment of the present invention, Figures 1 to 12 As shown, the air-cooled energy storage system includes a box body 1, a battery rack 2 and a plurality of battery modules 7. The battery rack 2 is arranged in the box body 1 and has a plurality of battery cavities 21. The plurality of battery cavities 21 are arranged at intervals along the left-right direction of the box body 1. The battery cavity 21 has a plurality of battery mounting positions arranged up and down. The battery rack 2 forms an air inlet channel 22 extending along the up and down direction between two adjacent battery cavities 21. A partition structure 25 is provided between the air inlet channel 22 and the two adjacent battery cavities 21, and at least one partition structure 25 is provided with a hollow area 251 corresponding to each battery mounting position. The hollow areas of the plurality of hollow areas 251 gradually increase from top to bottom, and each battery module 7 is provided at a battery mounting position.

[0040] Specifically, in the two partition structures 25 on the opposite sides of the air inlet channel 22, only one of the partition structures 25 can be provided with a plurality of hollow areas 251 so that each air inlet channel 22 corresponds to a battery cavity 21; or both partition structures 25 can be provided with a plurality of hollow areas 251. Such a setting can improve the ventilation effect and ensure that the battery cavities 21 on both sides of the air inlet channel 22 are evenly aired.

[0041] In this embodiment, the air-cooled energy storage system also includes a refrigeration device 3, which has an air inlet 31, an air outlet 32 ​​and a heat exchange air duct connected between the air inlet 31 and the air outlet 32, and the air outlet 32 ​​is connected to the upper end of the air inlet channel 22. Specifically, the refrigeration device 3 has a fan, and when the fan is working, it drives the airflow from the air inlet 31 to the heat exchange air duct, and finally flows from the air outlet 32 ​​to the air inlet channel 22. When the airflow flows through the heat exchange air duct, the airflow exchanges heat with the cold end of the refrigeration device 3, so that the airflow flowing to the air inlet channel 22 is a low-temperature cold airflow. When the low-temperature cold airflow flows through the battery module 7, it can take away the heat of the battery module 7, form a hot airflow, and finally flow to the air inlet 31 to realize circulation. In this way, the airflow inside the box 1 is circulated, which can reduce the influence of the external environment (such as the high temperature environment in summer) on the airflow inside the box 1, and can improve the heat dissipation efficiency and reduce the loss. Among them, the refrigeration device 3 can adopt compression refrigeration technology or other refrigeration technology.

[0042] In addition, in other embodiments, the upper end of the air inlet channel 22 may be connected to an external heat dissipation device to cool the battery module 7 through the external heat exchange device. Alternatively, a fan assembly may be provided on the housing 1, and the fan assembly may be used to drive the external airflow from the air inlet channel 22 to the battery module 7 and then to be discharged, so as to dissipate the heat of the battery module 7 through the flowing airflow.

[0043] It should be noted that the hollow areas of the multiple hollow areas 251 gradually increase from top to bottom, which means that the hollow areas of the multiple hollow areas 251 generally show an increasing trend from top to bottom. This includes both the case where the hollow areas of the multiple hollow areas 251 increase sequentially from top to bottom (that is, the hollow area of any hollow area 251 is larger than the hollow area of the hollow area 251 above it), and the case where the hollow areas of some adjacent hollow areas 251 in the up and down directions are the same (for example, when there are six hollow areas 251, the hollow areas of the six hollow areas 251 from top to bottom are successively: A, B, B, C, C, D or A, B, C, C, D, E, etc., where A < B < C < D < E). By setting it in this way, the ventilation volume of the upper hollow area 251 can be restricted, that is, the air intake volume of the upper battery installation position can be restricted, so that the cold air flow in the air intake channel 22 can fully flow to the lower position, avoiding the situation where most or all of the cold air flow enters the upper battery installation position, resulting in a reduction in the cold air flow entering the lower battery installation position, ensuring that the cold air flow inflow volume of the multiple battery installation positions in the same battery cavity 21 is relatively balanced, and improving the heat dissipation uniformity.

[0044] Among them, the hollow area of each hollow area 251 can be set according to actual needs, and the present invention does not limit this.

[0045] In some embodiments, the partition structure 25 includes a plurality of independent partitions. Each partition is provided corresponding to a battery installation position and is provided with a hollow area 251. That is, the multiple partitions can be independently installed, so that the size of a single partition can be smaller, which is convenient for assembly. Of course, in other embodiments, the partition structure 25 can be a whole plate.

[0046] In some embodiments, among the multiple hollow areas 251, at least some of the hollow areas 251 are provided with a plurality of first ventilation openings, and the plurality of first ventilation openings are spaced apart. Specifically, when setting the plurality of first ventilation openings, the plurality of ventilation openings can be dispersed in the hollow area 251, so that the air flow can enter the battery installation position dispersedly and quickly disperse to each area of the battery installation position, which is beneficial to improving the heat dissipation uniformity. Optionally, among the multiple hollow areas 251, the upper hollow area 251 is provided with a plurality of first ventilation openings.

[0047] In some embodiments, among the multiple hollow areas 251, one or more of the hollow areas 251 close to the bottom of the box body 1 are provided with a second ventilation opening. For example, one or two of the hollow areas 251 close to the bottom of the box body 1 can be provided with only one second ventilation opening, and the area of the second ventilation opening is larger than the total area of the plurality of first ventilation openings of any hollow area 251 above it. By setting it in this way, not only can the hollow area of the bottom hollow area 251 be larger, but also the structure of the partition structure 25 (partition) in this part can be simplified.

[0048] In some embodiments, a door 11 is provided on the opening side of the box body 1 corresponding to the battery cavity 21, and a return air channel 12 is provided between the battery rack 2 and the door 11, and the return air channel 12 is located between the air inlet channel 22 and the air inlet 31. Specifically, after opening the door 11, the battery module 7 can be disassembled and assembled through the opening side of the battery cavity 21. By providing the return air channel 12 between the battery rack 2 and the door 11, when the cold air flow enters the corresponding battery cavity 21 from the air inlet channel 22 and passes through the battery module 7, it can flow uniformly from the battery module 7 toward the side of the door 11 to the return air channel 12. In this way, the structure can be simplified while ensuring effective circulation of the air flow.

[0049] In some embodiments, the battery cavity 21 has a plurality of battery installation positions arranged up and down, the battery module 7 includes a housing 71 and a battery pack 74 disposed in the housing 71, a heat dissipation inlet 7121 connected to the air inlet 22 is disposed on the side of the housing 71, and a heat dissipation outlet is disposed on the side of the housing 71 facing the door 11. Specifically, the battery pack 74 includes a plurality of single cells 741, that is, when the cold airflow enters the housing 71 from the heat dissipation inlet 7121, the cold airflow can directly pass through the surface of the battery pack 74 (single cells 741), thereby improving the heat dissipation effect. Optionally, heat dissipation inlets 7121 are disposed on opposite sides of the housing 71, and the heat dissipation inlets 7121 are open.

[0050] Optionally, the battery module 7 further includes a cooling fan 75, which is disposed at the heat dissipation outlet to discharge the airflow in the housing 71 to the return air channel 12. In this way, the airflow can flow through the battery module 7 quickly, which can improve the heat dissipation efficiency, and can also speed up the airflow circulation speed in the box 1 to improve the heat dissipation effect. Of course, in other embodiments, the cooling fan 75 may not be provided, and the airflow circulation can be driven only by the fan in the heat dissipation device.

[0051] In some embodiments, the battery module 7 includes a plurality of battery packs 74, each battery pack 74 includes a plurality of single cells 741, and the plurality of single cells 741 are arranged in sequence along the front-to-back direction, and the plurality of battery packs 74 are spaced apart along the left-to-right direction to form a ventilation gap between two adjacent battery packs 74. Specifically, the left-to-right direction, the front-to-back direction, and the up-to-down direction are perpendicular to each other, that is, the ventilation gap extends along the front-to-back direction, and the end of the battery pack 74 away from the heat dissipation outlet is spaced apart from the outer shell 71, so that the cold air flow flowing in from the heat dissipation inlet 7121 can flow to the heat dissipation gap and finally flow out from the heat dissipation outlet. Compared with the method in which the battery monomer extends from one side of the outer shell 71 to the other side along the left-to-right direction, such a configuration can increase the heat dissipation area of ​​the battery pack 74 and improve the heat dissipation effect.

[0052] In some embodiments, the top of the battery rack 2 is spaced from the top plate of the box body 1 to form an installation cavity 13; the air-cooled energy storage system further includes a plurality of air guide shells 4, which are detachably mounted on the top of the battery rack 2 and arranged in the left-right direction, and the air guide shell 4 has an inlet 41 and a plurality of outlets 42, and the plurality of outlets 42 are located at the bottom of the air guide shell 4, and each outlet 42 corresponds to an air inlet channel 22, and the air outlet 32 ​​of the refrigeration device 3 is connected to the inlet 41. The upper end of the air inlet channel 22 is through-set, and after the air guide shell 4 is inserted into the installation cavity 13, the outlet 42 located at the bottom of the air guide shell 4 corresponds to the upper end of the air inlet channel 22. Since the cold airflow can fully flow to the air inlet channel 22 and the battery cavity 21 after flowing out from the outlet 42, the cold airflow is not easy to flow into the gap between the air guide shell 4 and the edge of the air inlet channel 22. When the bottom surface of the air guide shell 4 and the top surface of the battery rack 2 are relatively flat, the use requirements can be met, and there is no need to set a sealing ring between the air guide shell 4 and the battery rack 2, so that the assembly structure between the air guide shell 4 and the battery rack 2 is simple, which can simplify the structure of the air-cooled energy storage system and facilitate maintenance. Even if part of the cold air flows into the gap between the air guide shell 4 and the edge of the air inlet channel 22, it is still in the box 1, and its loss is very small, far less than the impact of the external ambient temperature on the box 1.

[0053] When working, the refrigeration device 3 delivers the cold air flow into the air guide shell 4, and then diverts it from multiple outlets 42 to the corresponding air inlet channels 22. This avoids setting up an air guide structure for each air inlet channel 22, reduces the number of air guide shells 4, and simplifies the structure of the air-cooled energy storage system.

[0054] In some embodiments, each air guide housing 4 is disposed above two adjacent battery cavities 21, and the mutually adjacent outlets 42 on the two adjacent air guide housings 4 correspond to the same air inlet channel 22, and the inlet 41 is located in the middle of the air guide housing 4 in the left-right direction. Specifically, there are three outlets 42 on the air guide housing 4, the outlet 42 in the middle corresponds to the air inlet channel 22 between the two battery cavities 21 below it, and the outlet 42 on the side and the outlet 42 on the adjacent air guide housing 4 also located on the side correspond to the adjacent air inlet channel 22 together. When the cold air flows into a single air guide shell 4 from the inlet port 41, a relatively large amount of cold air will first flow to the middle outlet port 42, and a relatively small part will be diverted to the outlet ports 42 on both sides. Since the outlet ports 42 close to each other on two adjacent air guide shells 4 correspond to the same air inlet channel 22 (i.e., the air inlet channel 22 between the two adjacent air guide shells 4), the air intake volume of the air inlet channel 22 between the two adjacent air guide shells 4 can be close to the air intake volume of the air inlet channel 22 corresponding to the middle outlet port 42 of the air guide shell 4, and the air intake volume of each air inlet channel 22 can be made more uniform, thereby improving the heat dissipation uniformity of each battery cavity 21.

[0055] In some embodiments, a door 11 is provided on the opening side of the box body 1 corresponding to the battery cavity 21, the refrigeration device 3 is provided on the door 11, and the inlet 41 is located on the side of the air guide shell 4 facing the door 11. In this way, the refrigeration device 3 can be installed using the door 11, and compared with the case where the refrigeration device 3 is provided on the top of the box body 1, the height of the box body 1 can be reduced or the height space of the box body 1 can be fully utilized to set the battery module 7. At the same time, the refrigeration device 3 can be made closer to the air guide shell 4, which can shorten the flow path of the cold air flow and reduce energy loss.

[0056] In some embodiments, there are multiple refrigeration devices 3, and the multiple refrigeration devices 3 correspond one-to-one to the multiple air guide shells 4 to ensure that sufficient cold air flow is delivered to each air inlet channel 22 to improve the heat dissipation effect.

[0057] Of course, in other embodiments, only one refrigeration device 3 may be provided. For example, the refrigeration device 3 may be provided in the middle or at one end of the box body 1 in the left-right direction, and the airflow may be transported to each air guide shell 4 through an air duct.

[0058] In some embodiments, the inlet 41 and the air outlet 32 ​​are connected by an air guide tube 5, one end of which is fixed to the air guide housing 4, and the other end is sealed against the edge of the air outlet 32. That is, when the door 11 is opened, the air guide tube 5 is always fixed to the air guide housing 4, and when the door 11 is closed, the air guide housing 4 just docks with the air outlet 32, thereby ensuring normal air flow. In this way, air flow can be ensured and the pressure of the door 11 can be reduced.

[0059] In some embodiments, the battery rack 2 has a plurality of first columns 23 and a plurality of second columns 24, and the plurality of first columns 23 and the plurality of second columns 24 are arranged at intervals in the left-right direction, and the first columns 23 and the second columns 24 are distributed at intervals in the front-back direction, and two air guide shells 4 are provided between any two adjacent first columns 23, and one end of any air guide shell 4 away from the other air guide shell 4 is restricted between the corresponding first column 23 and the second column 24.

[0060] Specifically, the first column 23 and the second column 24 are used to mainly support the weight of the battery rack 2 and the battery module 7. When installing, first put the air guide shell 4 into the installation cavity 13, and then slide it in the direction of the first column 23 until the air guide shell 4 partially extends between the first column 23 and the second column 24, and then use the first column 23 and the second column 24 to limit the air guide shell 4. The fixing structure of the air guide shell 4 on the mounting frame can be reduced, thereby simplifying the structure of the air-cooled energy storage system.

[0061] Optionally, the air-cooled energy storage system further includes a limiter 6, which is detachably mounted between the top of the battery rack 2 and the top plate of the box body 1, and is arranged corresponding to the position between the two air guide shells 4 between any two adjacent first columns 23, so as to limit the air guide shell 4 to the side away from the second column 24. In this way, the air guide shell 4 between two adjacent columns can be prevented from falling off the battery rack 2, the installation stability of the air guide shell 4 can be improved, and the installation structure can be avoided on the air guide shell 4, which can simplify the structure of the air guide shell 4. Of course, in other embodiments, the air guide shell 4 can also be locked to the battery rack 2 by screws.

[0062] In some embodiments, the battery module 7 includes an outer shell 71, a cooling fan 75 and multiple battery packs 74, the outer shell 71 has a front panel 711, the front panel 711 is provided with a through hole 7114, and the left and right sides of the outer shell 71 are both open; the multiple battery packs 74 are arranged in the outer shell 71 and are spaced apart in the left and right directions, each battery pack 74 includes multiple single cells 741, and the multiple single cells 741 of the same battery pack 74 are arranged in sequence along the front and rear directions; the cooling fan 75 is arranged at the through hole 7114.

[0063] Specifically, multiple battery packs 74 can be connected in series or in parallel, and can be arranged according to actual needs. The negative pressure side of the cooling fan 75 is located in the housing 71. When the cooling fan 75 is working, the external airflow can enter the housing 71 from the openings on the left and right sides of the housing 71, and flow to the through hole 7114 after passing through the gap between the battery pack 74 and two adjacent battery packs 74, so as to flow out of the battery module 7.

[0064] By setting the left and right sides of the outer shell 71 to be open and distributing multiple battery packs 74 at intervals in the left and right directions, the air inlet area of ​​the battery module 7 can be increased. At the same time, the air flow can flow through the gap between two adjacent battery packs 74, so that the heat dissipation area of ​​the battery pack 74 is larger, which can effectively improve the heat dissipation efficiency of the battery module 7.

[0065] In some embodiments, the top of the battery pack 74 is spaced from the top plate of the housing 71, the end of the battery pack 74 away from the front panel 711 is spaced from the back plate of the housing 71, and the distance between the battery pack 74 and the top plate of the housing 71 is smaller than the distance between the battery pack 74 and the back plate of the housing 71. This arrangement allows more airflow to flow from the end of the battery pack 74 away from the front panel 711 to the front panel 711, ensuring that each single battery 741 on the battery pack 74 can dissipate heat well and improve heat dissipation uniformity.

[0066] In some embodiments, the end of the battery pack 74 close to the front panel 711 is spaced from the front panel 711, and the left and right sides of the housing 71 are respectively provided with cover plates 73, which cover the gap between the battery pack 74 and the front panel 711. In this way, it is possible to prevent the airflow from flowing directly from the gap between the battery pack 74 and the front panel 711 to the through hole 7114, ensuring that sufficient airflow flows through the end of the battery pack 74 away from the front panel 711, thereby improving the heat dissipation efficiency and heat dissipation uniformity.

[0067] In some embodiments, the cooling fan 75 is located on the inner side of the front panel 711. In this way, the cooling fan 75 can be installed in the inner space of the battery module 7, so that the cooling fan 75 is prevented from protruding from the outer side of the front panel 711, which is beneficial to reducing the occupied space of the battery module 7 and ensuring the reliability of the cooling fan 75.

[0068] In some embodiments, the front panel 711 includes a fixing plate 7111 and a mounting plate 7113, the fixing plate 7111 has a mounting hole 7112, the mounting plate 7113 is detachably covered on the mounting hole 7112, and is provided with a through hole 7114, and the heat dissipation fan 75 is installed on the inner side of the mounting plate 7113. Specifically, the housing 71 includes a shell 712, the front side and the left and right sides of the shell 712 are open, and the fixing plate 7111 is installed on the front side of the shell 712. The size of the mounting hole 7112 is larger than the size of the through hole 7114. During installation, the heat dissipation fan 75 can be installed on the mounting plate 7113 first, and then the mounting plate 7113 can be installed on the fixing plate 7111, so that it is convenient to disassemble and assemble the mounting plate 7113 for maintenance and repair.

[0069] In some embodiments, the battery module 7 further includes a battery management module 76, which is mounted on the inner side of the mounting plate 7113 and located on one side of the through hole 7114. In this way, the battery management module 76 and the cooling fan 75 can be centrally mounted on the mounting plate 7113 during installation, and the mounting plate 7113 is fixed to the fixing plate 7111, which is convenient for installation and can facilitate disassembly of the mounting plate 7113 to perform maintenance and repair of the cooling fan 75 and the battery management module 76.

[0070] In some embodiments, two handles 77 are provided on the front panel 711, and the two handles 77 are provided on opposite sides of the through hole 7114. Specifically, when the battery module 7 is placed on the battery rack 2 of the energy storage system, the battery module 7 can be pulled out by holding the handle 77, which is convenient for the user to operate.

[0071] In some embodiments, each single cell 741 has two electrodes, and the electrodes are located on the top of the single cell 741. The battery pack 74 also includes a protective plate 742, and the protective plate 742 covers the top of the single cell 741. There is a gap between the protective plate 742 and the single cell 741. That is, the gap between the protective plate 742 and the single cell 741 allows airflow to pass through, so as to dissipate heat from the electrode part of the single cell 741, and the heat dissipation effect can be improved.

[0072] In some embodiments, the box body 1 is divided into two installation areas in the front-to-back direction perpendicular to the left-right direction and the up-down direction, and the battery rack 2 is provided with a plurality of battery cavities 21 corresponding to each installation area, and the plurality of battery cavities 21 in the same installation area are arranged at intervals along the left-to-right direction. With such an arrangement, the battery module 7 can be disassembled and assembled from opposite sides of the box body 1, making full use of the internal space of the box body 1, increasing the capacity of the air-cooled energy storage system, and facilitating maintenance. In some embodiments, the second column 24 is located between the two installation areas, and a plurality of first columns 23 are provided on the side of any installation area away from the other installation area. Optionally, a box door 11 is provided on the front and rear sides of the box body 1. Optionally, the two installation areas are symmetrically distributed, so that the structures in the two installation areas can be the same, which can reduce costs.

[0073] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air-cooled energy storage system, characterized in that: include: Box; A battery rack is arranged in the box body and has a plurality of battery cavities, the plurality of battery cavities are arranged at intervals along the left-right direction of the box body, the battery cavity has a plurality of battery installation positions arranged up and down, the battery rack forms an air inlet channel extending in the up and down direction between two adjacent battery cavities, a partition structure is provided between the air inlet channel and the two adjacent battery cavities, and at least one of the partition structures is provided with a hollow area corresponding to each battery installation position, and the hollow areas of the plurality of hollow areas are generally increasing from top to bottom; as well as A plurality of battery modules, each of which is arranged at one of the battery installation positions.

2. The air-cooled energy storage system according to claim 1, characterized in that: The barrier structure includes a plurality of mutually independent partitions, each of which is arranged corresponding to one of the battery installation positions and is provided with the hollow area.

3. The air-cooled energy storage system according to claim 2, characterized in that: At least part of the hollow area is provided with a plurality of first vents, and the plurality of first vents are arranged at intervals.

4. The air-cooled energy storage system according to claim 3, characterized in that: Among the multiple hollow areas, one or more of the hollow areas close to the bottom of the box body is provided with a second vent.

5. The air-cooled energy storage system according to claim 1, characterized in that: The air-cooled energy storage system also includes a refrigeration device, which has an air inlet, an air outlet and a heat exchange air duct connected between the air inlet and the air outlet, and the air outlet is connected to the upper end of the air inlet channel.

6. The air-cooled energy storage system according to claim 5, characterized in that: A box door is provided on the box body at the opening side corresponding to the battery cavity, and a return air channel is provided between the battery rack and the box door, and the return air channel is located between the air inlet channel and the air inlet.

7. The air-cooled energy storage system according to claim 6, characterized in that: The battery module comprises a shell and a battery pack arranged in the shell, a side of the shell is provided with a heat dissipation inlet connected with the air inlet channel, and a side of the shell facing the box door is provided with a heat dissipation outlet; The battery module also includes a heat dissipation fan, which is arranged at the heat dissipation outlet and is used to discharge the air flow in the shell to the return air channel.

8. The air-cooled energy storage system according to claim 5, characterized in that: The top of the battery rack is spaced from the top plate of the box body to form an installation cavity. The air-cooled energy storage system also includes a plurality of air guide shells, which are detachably installed in the installation cavity and arranged along the left-right direction. The air guide shell has an inlet and a plurality of outlets, and the plurality of outlets are located at the bottom of the air guide shell. Each outlet corresponds to an air inlet channel, and the inlet is connected to the air outlet.

9. The air-cooled energy storage system according to claim 8, characterized in that: Each of the air guide shells is arranged above two adjacent battery cavities, and the mutually adjacent outlets on the two adjacent air guide shells correspond to the same air inlet channel, and the inlet is located in the middle of the air guide shell in the left-right direction.

10. The air-cooled energy storage system according to any one of claims 1 to 9, characterized in that: The box body is divided into two installation areas in the front-to-back direction, and the two installation areas are symmetrically distributed. The battery rack is provided with a plurality of battery cavities corresponding to each installation area, and the plurality of battery cavities in the same installation area are arranged at intervals along the left-right direction.

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