Energy storage equipment and energy storage system

Abstract

The utility model discloses energy storage equipment and an energy storage system. The utility model provides energy storage equipment, which comprises a cabinet body, a plurality of accommodating bins, a plurality of battery assemblies, a plurality of fan assemblies and a plurality of mutually independent control circuits, and is characterized in that an accommodating space is formed in the cabinet body; the multiple containing bins are arranged in the containing space, each containing bin correspondingly forms a containing cavity, the multiple containing cavities are separated from one another, and each containing bin is provided with a first ventilation opening communicating with the corresponding containing cavity and the outer side of the corresponding containing cavity; one battery assembly is correspondingly arranged in one accommodating cavity; one fan assembly is correspondingly arranged at the first ventilation opening of one containing bin, the multiple fan assemblies are divided into at least two fan groups, and each fan group comprises at least one fan assembly; one control circuit is communicated with one fan group, and the control circuits are used for controlling the fan assemblies corresponding to the fan groups to start or stop. Therefore, the fan assemblies in the different fan groups can be independently controlled to be started or stopped, and the cost is saved.

Description

TECHNICAL FIELD

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

[0002] Air cooling energy storage is one of the main cooling methods in the current energy storage field. Air cooling is a cooling method using air as a cooling medium. Air cooling can blow air through a fan assembly to generate convection, thereby cooling heat sources such as batteries.

[0003] Currently, the temperatures of different regions in the air-cooled energy storage device are different, and the cooling requirements are different. The air-cooled energy storage device often has multiple fan assemblies corresponding to different regions, but these fan assemblies can usually only be turned on or turned off at the same time. Therefore, this method leads to inflexible control of the fan assemblies, high power consumption, and long working time of the fan assemblies, which shortens the service life of the fan assemblies and increases the cost. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide an energy storage device and an energy storage system to solve the above technical problems in the prior art.

[0005] To solve the above problems, the present application provides an energy storage device, which comprises a cabinet body, multiple containing bins, multiple battery assemblies, multiple fan assemblies, and multiple independent control circuits. The cabinet body forms a containing space. The multiple containing bins are arranged in the containing space. Each containing bin corresponds to a containing cavity, and the multiple containing cavities are separated from each other. Each containing bin is provided with a first ventilation opening communicating the containing cavity and the outside of the containing cavity. One battery assembly is arranged in one containing cavity. One fan assembly is arranged at the first ventilation opening of one containing bin. The multiple fan assemblies are divided into at least two fan groups, and each fan group includes at least one fan assembly. One control circuit is connected to one fan group, and the control circuit is used to control the start or stop of the fan assemblies corresponding to the fan group.

[0006] In some embodiments, the multiple containing bins are arranged in sequence in a first direction, each fan group includes multiple fan assemblies arranged in sequence along the first direction, and the control circuit corresponding to each fan group is connected to the multiple fan assemblies in the fan group.

[0007] In some embodiments, the multiple containing bins are further arranged in sequence in a second direction perpendicular to the first direction, and the multiple fan groups are arranged in sequence in the second direction.

[0008] In some embodiments, the number of fan groups is two, the two fan groups are a first group and a second group, and the first group and the second group are arranged in sequence in the second direction.

[0009] In some embodiments, the energy storage device further comprises a battery management system and a plurality of relays, one relay corresponding to one control circuit, the battery management system being electrically connected to the plurality of control circuits through the plurality of relays to turn on or turn off the control circuits.

[0010] In some embodiments, the battery assembly comprises a temperature sensor for detecting the temperature of the battery assembly, the temperature sensor being in communication with the battery management system.

[0011] In some embodiments, the receiving cavity further comprises a second ventilation opening communicating between the receiving cavity and the outside of the receiving cavity, the receiving space being filled with a heat-conducting gas, one of the first ventilation opening and the second ventilation opening allowing the heat-conducting gas to enter the receiving cavity from the outside of the receiving cavity, and the other allowing the heat-conducting gas to exit the receiving cavity.

[0012] In some embodiments, the fan assembly blows the heat-conducting gas into the receiving cavity from the second ventilation opening and out of the receiving cavity from the first ventilation opening.

[0013] In some embodiments, the energy storage device further comprises a heat exchange assembly arranged in the receiving space and outside the receiving cavity, the heat exchange assembly being configured to absorb heat from the heat-conducting gas to reduce the temperature of the heat-conducting gas.

[0014] To solve the above problems, the present application also provides an energy storage system comprising the energy storage device described above.

[0015] Compared with the prior art, the present application provides an energy storage device, which comprises a cabinet, a plurality of receiving cavities, a plurality of battery assemblies, a plurality of fan assemblies, and a plurality of independent control circuits, the cabinet forming a receiving space; the plurality of receiving cavities are arranged in the receiving space, each receiving cavity corresponding to one receiving cavity, the plurality of receiving cavities being separated from each other, each receiving cavity being provided with a first ventilation opening communicating between the receiving cavity and the outside of the receiving cavity; one battery assembly is arranged in one receiving cavity; one fan assembly is arranged at the first ventilation opening of one receiving cavity, the plurality of fan assemblies being divided into at least two fan groups, each fan group comprising at least one fan assembly; one control circuit is connected to one fan group, the control circuit being configured to control the corresponding fan assemblies of the fan group to start or stop. Through the above embodiments, the plurality of fan assemblies can be divided into a plurality of fan groups, the fan assemblies in each fan group being connected through an independent control circuit, so that the fan assemblies in different fan groups can be independently controlled to start or stop by different control circuits, and different fan groups can be independently started or stopped, so that part of the fan assemblies can be in a started state while the remaining fan assemblies are in a stopped state, thereby improving the flexibility of controlling the fan assemblies, without the need to simultaneously turn on or turn off all the fan assemblies, thereby reducing power consumption, prolonging the service life of the fan assemblies, and saving costs. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 is a structural schematic diagram of an energy storage system according to one or more embodiments of the present application;

[0018] Figure 2 is a structural schematic diagram of an energy storage device according to one or more embodiments of the present application;

[0019] Figure 3 is a structural schematic diagram of a control circuit of an energy storage device according to one or more embodiments of the present application;

[0020] Figure 4 is a structural schematic diagram of a battery assembly of an energy storage device according to one or more embodiments of the present application;

[0021] Figure 5 is a first perspective schematic diagram of a containing bin of an energy storage device according to one or more embodiments of the present application.

[0022] Drawing reference: energy storage system 1; energy storage device 2; cabinet body 10; containing space 11; containing bin 20; containing cavity 21; first air vent 22; second air vent 23; battery assembly 30; temperature sensor 31; fan assembly 40; fan subgroups 41; first subgroup 411; second subgroup 412; control circuit 50; battery management system 60; relay 70; heat exchange assembly 80; first direction x1; second direction x2. DETAILED DESCRIPTION

[0023] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0026] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0028] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0029] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0030] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0031] Air cooling energy storage is one of the main cooling methods in the current energy storage field. Air cooling is a cooling method using air as the cooling medium. Air cooling can blow air through a fan assembly to generate convection, thereby cooling heat sources such as batteries.

[0032] Currently, the temperatures of different regions in the air-cooled energy storage device are different, and the cooling requirements are different. The air-cooled energy storage device often has multiple fan assemblies corresponding to different regions. However, these fan assemblies can usually only be turned on or turned off at the same time. Therefore, this method leads to inflexible control of the fan assemblies, high power consumption, and long working time of the fan assemblies, which shortens the service life of the fan assemblies and increases the cost.

[0033] Please refer to Figure 1 , Figure 1 is a structural diagram of an energy storage system according to one or more embodiments of the present application.

[0034] To solve the above problems, the present application provides an energy storage system 1, which can be used to store and manage energy, for example, can store energy through a battery, and monitor and manage the state of the battery through a monitoring device. The energy storage system 1 includes an energy storage device 2, which can provide specific energy storage space and a good energy storage environment for the energy storage system 1.

[0035] Please refer to Figures 2-5 , Figure 2 is a structural diagram of an energy storage device according to one or more embodiments of the present application; Figure 3 is a structural diagram of a control circuit of an energy storage device according to one or more embodiments of the present application; Figure 4 is a structural diagram of a battery assembly of an energy storage device according to one or more embodiments of the present application; Figure 5 is a first perspective view of a containing bin of an energy storage device according to one or more embodiments of the present application.

[0036] To solve the above problems, the application provides a kind of energy storage equipment 2, energy storage equipment 2 includes: cabinet 10, multiple containing bin 20, multiple battery assembly 30, multiple fan assembly 40 and multiple independent control circuit 50, cabinet 10 is formed with containing space 11;Multiple containing bin 20 is arranged in containing space 11, each containing bin 20 is formed with one containing cavity 21 correspondingly, multiple containing cavities 21 are separated from each other, each containing bin 20 is equipped with the first vent 22 that containing cavity 21 and containing cavity 21 outside are communicated;One battery assembly 30 is correspondingly arranged in one containing cavity 21;One fan assembly 40 is correspondingly arranged at the first vent 22 of one containing bin 20, multiple fan assemblies 40 are divided into at least two fan groups 41, each fan group 41 includes at least one fan assembly 40;One control circuit 50 is communicated with one fan group 41, and control circuit 50 is used to control the start or stop of the corresponding fan assembly 40 of fan group 41.

[0037] Cabinet 10 is formed with containing space 11, and cabinet 10 has certain strength, to provide support and protection for the components such as containing bin 20, battery assembly 30 and fan assembly 40 in containing space 11. Multiple containing bin 20 is arranged in containing space 11, each containing bin 20 is formed with one containing cavity 21, multiple containing cavities 21 are separated from each other, for example, containing bin 20 is formed with containing cavity 21 by partition plate, and adjacent containing cavities 21 are separated from each other by partition plate. Each containing bin 20 is equipped with the first vent 22 that containing cavity 21 and containing cavity 21 outside are communicated, so that the gas inside and outside containing cavity 21 can be exchanged through the first vent 22.

[0038] A battery assembly 30 is disposed in the accommodating cavity 21, and the battery assembly 30 can include battery cells. The number of battery cells in each battery assembly 30 can be one, two, three, or more. Exemplarily, a battery assembly 30 can include two battery cells. As mentioned in the art, batteries can be classified into primary batteries and secondary batteries according to whether they can be recharged. Primary batteries, also known as "disposable" batteries and primary cells, cannot be recharged after their power is depleted and can only be discarded. Secondary batteries, also known as secondary cells or accumulators, are manufactured and processed differently from primary batteries. The advantage of secondary batteries is that they can be used multiple times after being charged. Secondary batteries have a higher output current load capacity than most primary batteries. Common types of secondary batteries currently available include lead-acid batteries, nickel-hydrogen batteries, and lithium-ion batteries. Lithium-ion batteries have the advantages of light weight, large capacity (1.5 times to 2 times the capacity of nickel-hydrogen batteries of the same weight), no memory effect, and very low self-discharge rate. Therefore, even though lithium-ion batteries are relatively expensive, they are still widely used. Lithium-ion batteries are also widely used in electric vehicles and hybrid vehicles. Lithium-ion batteries used for such purposes have relatively low capacity, but have high output, charging current, and long service life, but are relatively expensive.

[0039] The batteries described in the embodiments of the present application refer to secondary batteries or primary batteries. Hereinafter, the embodiments of the present application will be described mainly with lithium-ion batteries as an example. It should be understood that the embodiments of the present application are applicable to any other appropriate type of secondary battery. The batteries mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to appropriate devices to power the devices. The manufacturing methods of battery cells include the laminated type and the wound type, i.e., the battery cells are divided into laminated batteries and wound batteries. Laminated batteries have uniform current collection effect, small internal resistance, and large specific power. However, in order to improve accuracy, the mold precision requirement is extremely high, the equipment investment is high, and the process is relatively complex, resulting in low production efficiency. Wound batteries are simple to manufacture, and the manufacturing and assembly processes generally require low equipment precision, have high production efficiency, and are relatively low in cost. In terms of performance, wound batteries have excellent high and low temperature performance, very fast charging, super-long life, stable high output voltage, and strong structure and shock resistance.

[0040] It can be understood that the battery assembly 30 will generate heat during normal operation, and the generated heat will accumulate in the accommodation cavity 21. If the accumulated heat is not discharged from the accommodation cavity 21 in time, the temperature of the battery assembly 30 will be too high, which will cause the battery assembly 30 to be out of control, and even cause the battery assembly 30 to burn or explode. The fan assembly 40 is arranged at the first air vent 22 of the accommodation cavity 20. The fan assembly 40 can include but is not limited to a fan, etc. The fan assembly 40 can blow the gas inside and outside the accommodation cavity 21 to discharge the heat inside the accommodation cavity 21, thereby cooling the battery assembly 30. The plurality of fan assemblies 40 are divided into at least two fan groups 41. Each fan group 41 includes at least one fan assembly 40. The plurality of fan assemblies 40 can be divided into at least two fan groups 41 according to a certain number. The number of fan groups 41 can be two, three, four or more. The number of fan assemblies 40 in each fan group 41 can be the same or different. For example, the number of fan assemblies 40 can be two. The two fan assemblies 40 can be divided into two fan groups 41 according to the manner that each fan group 41 includes one fan assembly 40. Alternatively, the number of fan assemblies 40 can be six. The six fan assemblies 40 can be divided into two fan groups 41 according to the manner that each fan group 41 includes three fan assemblies 40. Alternatively, the six fan assemblies 40 can be divided into two fan groups 41 according to the manner that one fan group 41 includes two fan assemblies 40 and the other fan group 41 includes four fan assemblies 40. Alternatively, the plurality of fan assemblies 40 in a certain area can be divided into one fan group 41, and different areas can be divided into a plurality of fan groups 41.

[0041] The number of the control circuits 50 corresponds to the number of the fan groups 41. The control circuit 50 can include a power supply, so that the corresponding fan group 41 is driven by the power supply. One control circuit 50 is connected to one fan group 41, that is, all the fan assemblies 40 in one fan group 41 are connected to one corresponding control circuit 50. For example, when one fan group 41 includes seven fan assemblies 40, the control circuit 50 corresponding to the fan group 41 can be connected to the seven fan assemblies 40 respectively, and the seven fan assemblies 40 can be started or stopped simultaneously by the on-off of the control circuit 50. It should be noted that each fan group 41 corresponds to an independent control circuit 50, and the plurality of control circuits 50 are independent of each other and do not interfere with each other. It can be understood that different fan groups 41 can be in different working states. For example, when the number of the fan groups 41 is two, all the fan assemblies 40 in one fan group 41 can be in a starting state under the control of one control circuit 50, and all the fan assemblies 40 in the other fan group 41 can be in a stopping state under the control of the other control circuit 50. Thus, according to the temperature environment of different fan groups 41, the fan assemblies 40 corresponding to different fan groups 41 can be started or stopped flexibly by different control circuits 50, without the need to start or stop all the fan assemblies 40 at the same time.

[0042] According to the above embodiment, the plurality of fan assemblies 40 can be divided into a plurality of fan groups 41, and the fan assemblies 40 in each fan group 41 are connected to an independent control circuit 50, so that the fan assemblies 40 in different fan groups 41 can be started or stopped independently by different control circuits 50, and different fan groups 41 can be started or stopped independently. When part of the fan assemblies 40 are in a starting state, the remaining fan assemblies 40 are in a stopping state, so that the flexibility of controlling the fan assemblies 40 is improved, without the need to start or stop all the fan assemblies 40 at the same time, thereby reducing power consumption, prolonging the service life of the fan assemblies 40, and saving costs.

[0043] In some embodiments, the plurality of accommodation bins 20 are arranged in sequence in the first direction x1, each fan grouping 41 includes a plurality of fan assemblies 40 arranged in sequence in the first direction x1, and the control circuit 50 corresponding to each fan grouping 41 respectively communicates with the plurality of fan assemblies 40 in the fan grouping 41. The number of fan assemblies 40 in one fan grouping 41 can be two, three, four or more, and the number of fan groupings 41 can also be two, three, four or more. For example, the energy storage device 2 can have six accommodation bins 20, each of which is provided with one fan assembly 40, and the six accommodation bins 20 can be arranged in sequence in the first direction x1. The six fan assemblies 40 corresponding to the six accommodation bins 20 can be divided into one fan grouping 41, or the adjacent three fan assemblies 40 of the six fan assemblies 40 can be divided into one fan grouping 41, and there are two fan groupings 41 in total. The fan assemblies 40 in each fan grouping 41 can be arranged in sequence in the first direction x1. In some application scenarios, the control circuit 50 can respectively communicate with the plurality of fan assemblies 40 in the corresponding fan grouping 41, and further, the control circuit 50 can also be electrically connected to the plurality of fan assemblies 40 in sequence in the first direction x1. In this way, the plurality of accommodation bins 20 are arranged regularly to arrange a larger number of accommodation bins 20 and battery assemblies 30 in a limited space, thereby improving the energy density of the energy storage system 1. The plurality of fan assemblies 40 are arranged in sequence in the first direction x1 to form fan groupings 41, and the control circuit 50 can control the plurality of fan assemblies 40 in the regular area corresponding to the fan grouping 41, thereby facilitating the signal transmission efficiency of the control circuit 50.

[0044] In some embodiments, the plurality of accommodation bins 20 are also arranged in sequence in a second direction x2 perpendicular to the first direction x1, and the plurality of fan groupings 41 are arranged in sequence in the second direction x2. The plurality of accommodation bins 20 can be arranged in sequence in the first direction x1 and the second direction x2 at the same time, and the fan groupings 41 can be arranged in sequence in the second direction x2. For example, the number of accommodation bins 20 can be nine, and the nine accommodation bins 20 are arranged in sequence in the form of three rows in the first direction x1 and three columns in the second direction x2. The three fan groupings 41 can be divided in the manner that each fan grouping 41 includes one column of three rows of fan assemblies 40, that is, three fan assemblies 40 arranged in sequence in the first direction x1 form one fan grouping 41, and the three fan groupings 41 are arranged in sequence in the second direction x2. In this way, the accommodation bins 20 can be further arranged regularly to arrange a larger number of accommodation bins 20 and battery assemblies 30 in a limited space, thereby further improving the energy density of the energy storage system 1, and further facilitating the control of the control circuit 50 on the plurality of fan assemblies 40 in the regular area corresponding to the fan grouping 41, thereby improving the control efficiency.

[0045] In some embodiments, the number of the fan groupings 41 is two, the two fan groupings 41 are respectively a first grouping 411 and a second grouping 412, and the first grouping 411 and the second grouping 412 are arranged in sequence in the second direction x2. For example, the number of the fan assemblies 40 is fifteen, and the fan assemblies 40 are divided into the first grouping 411 and the second grouping 412 in a manner of one group of seven and another group of eight, wherein the seven fan assemblies 40 of the first grouping 411 are arranged in sequence in the first direction x1, the eight fan assemblies 40 of the second grouping 412 are arranged in sequence in the first direction x1, and the first grouping 411 and the second grouping 412 are arranged in sequence in the second direction x2. The opening and closing of the fan assemblies 40 in the first grouping 411 and the second grouping 412 can be controlled by two control circuits 50 respectively. In this way, all the fan assemblies 40 are divided into two fan groupings 41 arranged in the second direction x2, the flexibility of the control of the fan assemblies 40 is improved, the overall cooling demand of different areas corresponding to different fan groupings 41 is fully considered, the number of the control circuits 50 is reduced, and the cost is saved.

[0046] In some embodiments, the energy storage device 2 further comprises a battery management system 60 and a plurality of relays 70, one relay 70 corresponding to one control circuit 50, and the battery management system 60 is electrically connected to the plurality of control circuits 50 through the plurality of relays 70 to turn on or turn off the control circuits 50. The battery management system 60 is electrically connected to the plurality of control circuits 50. The battery management system 60 (BMS) can have a great influence on the safe operation, control strategy selection, charging mode selection, and operating cost of the energy storage device 2. The battery management system 60 can complete real-time monitoring and fault diagnosis of the state of the energy storage device 2, so as to adopt a reasonable control strategy to achieve the purpose of effectively and efficiently using the energy storage device 2. In this embodiment, the battery management system 60 can be electrically connected to the plurality of control circuits 50 to control the plurality of control circuits 50 at the same time through the battery management system 60, and to perform balancing control and fault diagnosis of the battery assemblies 30 and the like. At the same time, since the plurality of fan assemblies 40 in the fan grouping 41 are connected through the control circuit 50, the power of the control circuit 50 is large, one relay 70 corresponds to one control circuit 50, and the on-off of the control circuit 50 can be realized through the relay 70. In this way, the battery management system 60 can provide control signals for the control circuits 50 through the relays 70, and it is convenient to manage different fan groupings 41, and the control signals for the control circuits 50 are provided through the relays 70, and the safety is improved.

[0047] In some embodiments, as Figure 4As shown, the battery assembly 30 comprises a temperature sensor 31 for detecting the temperature of the battery assembly 30, and the temperature sensor 31 is communicatively connected with the battery management system 60. The temperature sensor 31 can detect the temperature of the battery assembly 30, and the temperature sensor 31 can detect the temperature of the battery cells in the battery assembly 30, and communicate the detected temperature to the battery management system 60, so as to facilitate the battery management system 60 to monitor the state of the battery assembly 30, and control the start or stop of the fan assemblies 40 in the corresponding fan group 41 according to the control strategy. For example, when the temperature of the battery assembly 30 corresponding to the fan assemblies 40 in a certain fan group 41 detected by the temperature sensor 31 is higher than a first preset temperature, the battery management system 60 can control the corresponding control circuit 50 to be connected through the relay 70, so as to open all the fan assemblies 40 in the corresponding fan group 41, thereby cooling the battery assembly 30. When the temperature of the battery assembly 30 corresponding to all the fan assemblies 40 in a certain fan group 41 detected by the temperature sensor 31 is lower than a second preset temperature, the battery management system 60 can control the corresponding control circuit 50 to be disconnected through the relay 70, so as to close all the fan assemblies 40 in the corresponding fan group 41, thereby saving power and prolonging the service life of the fan assemblies 40. The second preset temperature is less than or equal to the first preset temperature. In this way, the temperature sensor 31 and the control circuit 50 can be cooperated to further improve the control flexibility of the fan assemblies 40.

[0048] In some embodiments, as Figure 5 As shown, the accommodating cavity 21 is further provided with a second ventilation opening 23 in communication with the outside of the accommodating cavity 21. The accommodating space 11 is filled with a heat-conducting gas. One of the first ventilation opening 22 and the second ventilation opening 23 allows the heat-conducting gas to enter the accommodating cavity 21 from the outside of the accommodating cavity 21, and the other allows the heat-conducting gas to exit the accommodating cavity 21. The second ventilation opening 23 can be spaced apart from the first ventilation opening 22. Alternatively, the first ventilation opening 22 is arranged at one end of the accommodating cavity 21, and the second ventilation opening 23 is arranged at the other end of the accommodating cavity 21 opposite to the first ventilation opening 22. The heat-conducting gas can include, but is not limited to, air or a specific gas. The heat-conducting gas can be filled in the accommodating space 11. For example, the fan assemblies 40 can blow the heat-conducting gas to flow, so that the heat-conducting gas enters the accommodating cavity 21 from one of the first ventilation opening 22 and the second ventilation opening 23, absorbs the heat generated by the battery assembly 30 in the accommodating cavity 21, and exits the accommodating cavity 21 through the other of the first ventilation opening 22 and the second ventilation opening 23, thereby taking out the heat generated by the battery assembly 30 from the accommodating cavity 21 and cooling the battery assembly 30. In this way, the heat generated by the battery assembly 30 can be taken out of the accommodating cavity 21 through the convection of the heat-conducting gas between the first ventilation opening 22 and the second ventilation opening 23, thereby improving the cooling effect of the battery assembly 30.

[0049] In some embodiments, the fan assembly 40 blows the heat-conducting gas from the second vent 23 into the containing cavity 21, and out of the containing cavity 21 from the first vent 22. It is to be noted that, compared to the way the fan assembly actively sucks the heat-conducting gas from the first vent 22 and makes the heat-conducting gas exit the containing cavity 21 from the second vent 23 to cool the battery assembly 30, the way the fan assembly actively discharges the heat-conducting gas from the first vent 22 to passively make the heat-conducting gas enter the containing cavity 21 from the second vent 23 to cool the battery assembly 30 has higher heat transfer efficiency, which can further improve the cooling efficiency of the battery assembly 30 and save cost.

[0050] In some embodiments, the energy storage device 2 further comprises a heat exchange assembly 80, which is arranged in the containing space 11 and outside the containing cavity 21, and is used to absorb the heat of the heat-conducting gas to reduce the temperature of the heat-conducting gas. The heat exchange assembly 80 can include, but is not limited to, an air conditioner, etc. The heat exchange assembly 80 can exchange heat with the high-temperature heat-conducting gas that exits the containing cavity 21, so as to reduce the temperature of the heat-conducting gas, so that the heat-conducting gas enters the containing cavity 21 under the blowing of the fan assembly 40 to cool the battery assembly 30. In this way, the cooling effect of the fan assembly 40 on the battery assembly 30 can be further improved by the heat exchange assembly 80.

[0051] In summary, the energy storage device 2 provided by the application comprises a cabinet 10, a plurality of containing bins 20, a plurality of battery assemblies 30, a plurality of fan assemblies 40 and a plurality of independent control circuits 50, the cabinet 10 is formed with a containing space 11; the plurality of containing bins 20 are arranged in the containing space 11, each containing bin 20 is correspondingly formed with a containing cavity 21, the plurality of containing cavities 21 are separated from each other, and each containing bin 20 is provided with a first ventilation opening 22 communicating the containing cavity 21 and the outside of the containing cavity 21; one battery assembly 30 is correspondingly arranged in one containing cavity 21; one fan assembly 40 is correspondingly arranged at the first ventilation opening 22 of one containing bin 20, and the plurality of fan assemblies 40 are divided into at least two fan groups 41, each fan group 41 comprises at least one fan assembly 40; one control circuit 50 is connected to one fan group 41, and the control circuit 50 is used for controlling the start or stop of the corresponding fan assembly 40 of the fan group 41. Through the above-mentioned implementation, the plurality of fan assemblies 40 can be divided into a plurality of fan groups 41, the fan assemblies 40 in each fan group 41 are connected through an independent control circuit 50, so that the fan assemblies 40 in different fan groups 41 can be independently controlled to start or stop through different control circuits 50, and different fan groups 41 can be independently started or stopped, so that part of the fan assemblies 40 can be in a start state while the rest of the fan assemblies 40 are in a stop state, thereby improving the flexibility of the control of the fan assemblies 40, without the need to simultaneously start or stop all the fan assemblies 40, thereby reducing power consumption, prolonging the service life of the fan assemblies 40 and saving costs.

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and they should be covered in the scope of the claims and the specification of the application. Especially, as long as there is no structural conflict, each technical feature mentioned in the embodiments can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: a cabinet body formed with a containing space; a plurality of containing bins arranged in the containing space, each containing bin being formed with a containing cavity, the plurality of containing cavities being separated from each other, and each containing bin being provided with a first ventilation opening communicating between the containing cavity and outside of the containing cavity; a plurality of battery assemblies, each battery assembly being arranged in a corresponding containing cavity; a plurality of fan assemblies, each fan assembly being arranged at the first ventilation opening of a corresponding containing bin, and the plurality of fan assemblies being divided into at least two fan groups, each fan group comprising at least one fan assembly; a plurality of independent control circuits, each control circuit being connected to a corresponding fan group, and the control circuit being used to control the start or stop of the corresponding fan assemblies of the fan group.

2. The energy storage device of claim 1, wherein, The plurality of containing bins are arranged in sequence in a first direction, each fan group comprises a plurality of fan assemblies arranged in sequence in the first direction, and the control circuit corresponding to each fan group is connected to the plurality of fan assemblies in the fan group.

3. The energy storage device of claim 2, wherein, The plurality of containing bins are also arranged in sequence in a second direction perpendicular to the first direction, and the plurality of fan groups are arranged in sequence in the second direction.

4. The energy storage device of claim 3, wherein, The number of fan groups is two, and the two fan groups are a first group and a second group arranged in sequence in the second direction.

5. The energy storage device according to any one of claims 1 to 4, wherein The energy storage device further comprises a battery management system and a plurality of relays, each relay being arranged corresponding to a control circuit, and the battery management system being electrically connected to the plurality of control circuits through the plurality of relays to turn on or off the control circuit.

6. The energy storage device of claim 5, wherein, The battery assembly comprises a temperature sensor for detecting the temperature of the battery assembly, and the temperature sensor is in communication connection with the battery management system.

7. The energy storage device of claim 1, wherein, The containing bin is also provided with a second ventilation opening communicating between the containing cavity and outside of the containing cavity, the containing space is filled with a heat-conducting gas, and one of the first ventilation opening and the second ventilation opening allows the heat-conducting gas to enter the containing cavity from outside of the containing cavity, and the other allows the heat-conducting gas to exit the containing cavity.

8. The energy storage device of claim 7, wherein, The fan assembly blows the heat-conducting gas from the second ventilation opening into the containing cavity and from the first ventilation opening out of the containing cavity.

9. The energy storage device of claim 7, wherein, The energy storage device further comprises a heat exchange assembly arranged in the containing space and outside of the containing cavities, and the heat exchange assembly is used to absorb the heat of the heat-conducting gas to reduce the temperature of the heat-conducting gas.

10. An energy storage system characterized by, The energy storage system comprises the energy storage device according to any one of claims 1-9.

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