Energy storage system and thermal management method

Abstract

An energy storage system (1000) and a thermal management method. The energy storage system (1000) comprises first energy storage apparatuses (200) and a second energy storage apparatus (100). Each first energy storage apparatus (200) comprises a first case (210) and a first battery module (220). Each first battery module (220) is arranged in the corresponding first case (210), and each first case (210) is provided with a first connector (310). The second energy storage apparatus (100) comprises a second case (10) and a second battery module (20) arranged in the second case (10). The second case (10) is provided with a second connector (320). Each first connector (310) is configured to be in pluggable connection with the second case (10) of the second energy storage apparatus (100) or with the second connector (320) of the other first energy storage apparatus (200). The first connector (310) and the second connector (320) jointly form a ventilation duct (330). The ventilation duct (330) is provided with a switch. The switch is configured to control the open / closed state of the ventilation duct (330), such that the first case (210) is in communication with or isolated from the second case (10) connected thereto, or two adjacent first cases (210) are in communication or isolated.

Description

Energy storage systems and thermal management methods

[0001] Priority information

[0002] This application claims priority and benefits to patent applications filed on May 27, 2024, with China National Intellectual Property Administration, with patent application numbers 202410674646.1 and 202410674655.0, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of energy storage product technology, and more particularly to energy storage systems and thermal management methods. Background Technology

[0004] In related technologies, to facilitate users' use of electricity on balconies, users can install photovoltaic devices and energy storage equipment on their balconies. Energy storage equipment mainly includes battery modules. However, the energy storage capacity of battery modules is limited. In order to expand the energy storage capacity of energy storage equipment, external battery packs can be connected to the energy storage equipment. However, the working environment of the external battery pack is not very consistent with that of the energy storage equipment's own battery modules, which can easily lead to unstable working conditions and poor performance of the external battery pack and the energy storage equipment's own battery modules. Summary of the Invention

[0005] In view of this, the present invention aims to at least partially solve one of the problems in the related art. Therefore, the object of this application is to provide an energy storage system and a thermal management method.

[0006] This application provides an energy storage system. The energy storage system includes a first energy storage device and a second energy storage device. The first energy storage device includes a first housing and a first battery module. The first battery module is disposed within the first housing. A first connector is provided on the first housing. The second energy storage device includes a second housing and a second battery module disposed within the second housing. A second connector is provided on the second housing. The first connector is used for pluggable connection with a second connector disposed on the second housing of the second energy storage device or another first energy storage device. The first connector and the second connector are connected for connecting the first battery module and the second battery module of the second energy storage device in series or in parallel. The first connector and the second connector together form a ventilation duct. A switch is provided in the ventilation duct. The switch is used to control the opening and closing of the ventilation duct to connect or isolate the first housing with a second housing connected to it, or to connect or isolate two adjacent first housings.

[0007] In some embodiments, both the first connector and the second connector are provided with conductive terminals for electrically connecting the first battery module and the second battery module, and the conductive terminals are located on one side of the ventilation duct.

[0008] In some embodiments, both the first connector and the second connector are provided with communication terminals, which are used to enable the first energy storage device to communicate with the second energy storage device, or to enable multiple second energy storage devices to communicate.

[0009] In some embodiments, the first housing is further provided with a second connector, and the first connector and the second connector are respectively located on different sides of the first housing.

[0010] In some embodiments, the first housing includes a top plate and a bottom plate opposite to the top plate, the first connector is disposed on the top plate, and the second connector is disposed on the bottom plate.

[0011] In some embodiments, the first connector protrudes from the top surface of the top plate, and the second connector is recessed into the first housing relative to the bottom surface of the bottom plate.

[0012] In some embodiments, the first energy storage device is further configured to receive an opening or closing command for the ventilation duct, and upon receiving the opening or closing command for the ventilation duct, to open or close the ventilation duct according to the opening or closing command.

[0013] In some embodiments, the number of the first energy storage devices is at least two, and the at least two first energy storage devices are pluggably connected via the first connection and the second connector, wherein one of the first energy storage devices is pluggably connected to the second energy storage device.

[0014] In some embodiments, the second energy storage device further includes an inverter disposed in the second housing, the inverter being electrically connected to the second battery module.

[0015] In some embodiments, the second enclosure has a first chamber and a second chamber that are independent of each other. The second energy storage device also includes an inverter, a second battery module and a heat insulation plate. The inverter is disposed in the first chamber, the second battery module is disposed in the second chamber, and the heat insulation plate is disposed in the second enclosure and between the first chamber and the second chamber. The heat insulation plate is configured to communicate with or block the first chamber from the second chamber.

[0016] In some embodiments, the second energy storage device includes a fan disposed in the first chamber and / or the second chamber, the fan being used to create an airflow between the first chamber and the second chamber.

[0017] In some embodiments, the heat insulation plate is provided with at least one through hole, which can be blocked or opened. When the through hole is blocked, the first chamber is blocked from the second chamber, and when the through hole is opened, the first chamber is connected to the second chamber.

[0018] In some embodiments, the second enclosure is provided with a vent for communicating the external environment of the second enclosure with the first chamber.

[0019] In some embodiments, the inverter is provided with a heat sink for dissipating heat from the inverter.

[0020] In some embodiments, the energy storage system further includes a controller for detecting the temperature of the second battery module to obtain a first detection temperature, and for controlling the state of the heat insulation plate according to the first detection temperature to make the first chamber communicate with or block the second chamber.

[0021] In some embodiments, the controller is configured to control the heat insulation plate to connect the first chamber and the second chamber when the first detected temperature is less than the first predetermined temperature, so as to allow heat exchange between the first chamber and the second chamber; or, when the first detected temperature is greater than or equal to the first predetermined temperature, control the heat insulation plate to block the first chamber from the second chamber, so as to stop heat exchange between the first chamber and the second chamber.

[0022] In some embodiments, the controller is further configured to control the heating element disposed on the second battery module to heat the second battery module when the first detected temperature is lower than the first predetermined temperature.

[0023] In some embodiments, the controller is configured to detect the temperature of the heat sink on the inverter to obtain a second detected temperature, and to control the ventilation opening of the vent in the second enclosure to open the external environment of the second enclosure to connect the first chamber with the external environment of the second enclosure, so that the external environment of the second enclosure exchanges heat with the first chamber, wherein the second predetermined temperature is greater than the first predetermined temperature.

[0024] In some embodiments, when there are at least two first energy storage devices, the first battery modules in the two adjacent first energy storage devices are electrically connected through the first connector and the second connector between the two adjacent first energy storage devices.

[0025] In some embodiments, the energy storage system further includes a controller for detecting the temperature of the second battery module to obtain a first detection temperature, and controlling the heat insulation plate to connect the first chamber and the second chamber when the first detection temperature is less than a first predetermined temperature, so as to allow heat exchange between the first chamber and the second chamber, and controlling the ventilation ducts of the first connector and the second connector located between the second battery module and the first energy storage device adjacent thereto to be connected, so as to allow heat exchange between the second chamber and the first housing adjacent to the second chamber.

[0026] In some embodiments, the energy storage system further includes a controller configured to detect the temperature of the second battery module to obtain a first detection temperature, and, if the first detection temperature is less than a first predetermined temperature, control the heat insulation plate to connect the first chamber and the second chamber to allow heat exchange between the first chamber and the second chamber, and control the ventilation ducts of the first connector and the second connector located between the second battery module and the adjacent first energy storage device to be connected to allow heat exchange between the second chamber and the first housing adjacent to the second chamber, and control the ventilation ducts of the first connector located between two adjacent first energy storage devices to be connected to allow heat exchange between two adjacent first housings of at least two first housings.

[0027] In some embodiments, the controller is further configured to control the heating element disposed on the first battery module to heat the first battery module when the first detected temperature is lower than the first predetermined temperature.

[0028] In some embodiments, the energy storage system further includes a controller for detecting the temperature of the second battery module to obtain a first detection temperature, and, if the first detection temperature is greater than a third predetermined temperature, controlling the first chamber and the second chamber to remain blocked, and controlling the ventilation ducts of the first connector and the second connector to be open so that the second chamber and the first housing adjacent to the second chamber can exchange heat, and if the number of the first housings is at least two, controlling two adjacent first housings of at least two first housings to exchange heat, wherein the third predetermined temperature is greater than the first predetermined temperature.

[0029] In some embodiments, a heating element is provided on the second battery module and / or the first battery module, the heating element being used to heat the second battery module and the first battery module.

[0030] This application also provides a thermal management method for an energy storage system. The energy storage system includes a second energy storage device and a first energy storage device. The first energy storage device includes a first housing and a first battery module, the first battery module being disposed within the first housing. The second energy storage device includes a second housing, an inverter, a second battery module, and a heat insulation plate. The second housing has independent first and second chambers. The inverter is disposed within the first chamber, and the second battery module is disposed within the second chamber. The first battery module is electrically connected to the second battery module. The heat insulation plate is disposed within the second housing and between the first and second chambers. The thermal management method includes:

[0031] The temperature of the second battery module is detected to obtain a first detection temperature;

[0032] Based on the first detected temperature, the state of the heat insulation plate is controlled to make the first chamber and the second chamber connect or block each other.

[0033] In some embodiments, the thermal management method includes:

[0034] When the first detected temperature is lower than the first predetermined temperature, the heat insulation plate is controlled to connect the first chamber and the second chamber, so that heat exchange can occur between the first chamber and the second chamber; or

[0035] When the first detected temperature is greater than or equal to the first predetermined temperature, the heat insulation plate is controlled to block the first chamber from the second chamber, so as to stop heat exchange between the first chamber and the second chamber.

[0036] In some embodiments, the thermal management method includes:

[0037] When the first detected temperature is lower than the first predetermined temperature, the heating element installed on the second battery module is controlled to heat the second battery module.

[0038] In some embodiments, the thermal management method includes:

[0039] The temperature of the heat sink on the inverter is detected to obtain a second detection temperature;

[0040] When the second detected temperature is greater than the second predetermined temperature, the ventilation port of the second housing is opened to connect the external environment of the second housing with the first chamber, so that the external environment of the second housing can exchange heat with the first chamber, and the second predetermined temperature is greater than the first predetermined temperature.

[0041] In some embodiments, the thermal management method includes:

[0042] When the first detected temperature is lower than the first predetermined temperature, the heat insulation plate is controlled to connect the first chamber and the second chamber so that heat exchange can occur between the first chamber and the second chamber. The ventilation ducts of the first connector and the second connector located between the second battery module and the first energy storage device adjacent to the second battery module are also controlled to be connected so that heat exchange can occur between the second chamber and the first housing adjacent to the second chamber.

[0043] In some embodiments, the thermal management method further includes:

[0044] When the first detected temperature is less than the first predetermined temperature, the heat insulation plate is controlled to connect the first chamber and the second chamber to allow heat exchange between the first chamber and the second chamber. The ventilation ducts of the first connector and the second connector located between the second battery module and the adjacent first energy storage device are also controlled to be connected to allow heat exchange between the second chamber and the first housing adjacent to the second chamber. Furthermore, the ventilation ducts of the first connector and the second connector located between two adjacent first energy storage devices are also controlled to allow heat exchange between two adjacent first housings of at least two first housings.

[0045] In some embodiments, the thermal management method further includes:

[0046] When the first detected temperature is lower than the first predetermined temperature, the heating element installed on the first battery module is controlled to heat the first battery module.

[0047] In some embodiments, the thermal management method further includes:

[0048] When the first detected temperature is greater than the third predetermined temperature, the first chamber and the second chamber are kept blocked, and the ventilation ducts of the first connector of the first energy storage device and the second connector of the second energy storage device are opened to allow heat exchange between the second chamber and the first housing adjacent to the second chamber. When there are at least two first housings, the adjacent two first housings in the at least two first housings are controlled to exchange heat. The third predetermined temperature is greater than the first predetermined temperature.

[0049] In the energy storage system and thermal management method of this application, the first connector and the second connector can electrically connect the first energy storage device to the second energy storage device, or electrically connect multiple first energy storage devices. Based on this, the switch set in the ventilation duct connects or isolates the second housing of the second energy storage device connected to the first housing, or connects or isolates two adjacent first housings, thereby enabling heat exchange between the first energy storage device and the second energy storage device, or between multiple first energy storage devices. The working environment of the energy storage devices is highly consistent, which is beneficial to improving the working performance of the battery module of the energy storage device, and the structure of the energy storage device is more compact.

[0050] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0051] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0052] Figure 1 is a three-dimensional structural schematic diagram of an energy storage system according to certain embodiments of this application;

[0053] Figure 2 is a schematic diagram of the internal structure of an energy storage system according to certain embodiments of this application;

[0054] Figure 3 is a schematic diagram of the structure of a second energy storage device according to certain embodiments of this application;

[0055] Figure 4 is one of the scenario diagrams of an energy storage system according to certain embodiments of this application;

[0056] Figure 5 is a second scenario diagram of an energy storage system according to certain embodiments of this application;

[0057] Figure 6 is a schematic diagram of the structure in which the first connector and the second connector are disconnected according to certain embodiments of this application;

[0058] Figure 7 is a schematic diagram of one scenario of the first energy storage device according to certain embodiments of this application;

[0059] Figure 8 is a second scenario diagram of the first energy storage device according to certain embodiments of this application;

[0060] Figure 9 is a third scenario diagram of an energy storage system according to certain embodiments of this application;

[0061] Figure 10 is a schematic diagram of one scenario of a second energy storage device according to certain embodiments of this application;

[0062] Figure 11 is a second scenario diagram of a second energy storage device according to certain embodiments of this application;

[0063] Figure 12 is a third scenario diagram of the second energy storage device according to certain embodiments of this application;

[0064] Figure 13 is a fourth scenario diagram of an energy storage system according to certain embodiments of this application;

[0065] Figure 14 is a fifth scenario diagram of an energy storage system according to certain embodiments of this application;

[0066] Figure 15 is a sixth scenario diagram of an energy storage system according to certain embodiments of this application;

[0067] Figure 16 is a seventh scenario diagram of an energy storage system according to certain embodiments of this application;

[0068] Figure 17 is a schematic flowchart of a thermal management method according to certain embodiments of this application;

[0069] Figure 18 is a flowchart illustrating a thermal management method according to certain embodiments of this application;

[0070] Figure 19 is a flowchart illustrating a thermal management method according to certain embodiments of this application;

[0071] Figure 20 is a schematic flowchart of a thermal management method according to certain embodiments of this application;

[0072] Figure 21 is a schematic flowchart of a thermal management method according to certain embodiments of this application;

[0073] Figure 22 is a schematic flowchart of a thermal management method according to certain embodiments of this application;

[0074] Figure 23 is a schematic flowchart of a thermal management method according to certain embodiments of this application;

[0075] Figure 24 is a schematic flowchart of a thermal management method according to certain embodiments of this application.

[0076] Main component reference numerals: 1000-Energy storage system, 200-First energy storage device, 210-First enclosure, 211-Accommodation chamber, 212-Top plate, 213-Bottom plate, 220-First battery module, 310-First connector, 320-Second connector, 330-Ventilation duct, 340-Conductive terminal, 350-Communication terminal, 230-First heating element, 240-First fan, 100-Second energy storage device, 10-Second enclosure, 11-First chamber, 13-Second chamber, 15-Ventilation opening, 20-Second battery module, 21-Radiator, 30-Inverter, 40-Heat insulation plate, 41-Through hole, 50-Second fan, 60-Second heating element, 83-First fixing part, 85-Second fixing part, 400-Controller. Detailed Implementation

[0077] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0078] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0079] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0080] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or connections that allow communication between components; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0081] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0082] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0083] Referring to Figures 1 and 2, this application discloses an energy storage system 1000. The energy storage system 1000 includes a first energy storage device 200 and a second energy storage device 100. The first energy storage device 200 and the second energy storage device 100 are detachably connected and electrically connected to each other to increase the energy storage capacity of the energy storage system 1000. In some embodiments, the number of first energy storage devices 200 is at least one; for example, the number of first energy storage devices 200 can be one, two, three, four, etc. The first energy storage devices 200 can be detached and connected sequentially, allowing the energy storage system 1000 to be configured with a predetermined number of first energy storage devices 200 as needed.

[0084] It should be noted that the "energy storage device" referred to below can be either the first energy storage device 200 or the second energy storage device 100.

[0085] Please refer to Figures 2-4. In some embodiments, the first energy storage device 200 includes a first housing 210 and a first battery module 220, with the first battery module 220 disposed within the first housing 210. A first connector 310 is provided on the first housing 210, which is pluggably connected to a second connector 320 disposed on the second housing 10 of the second energy storage device 100 or another first energy storage device 200. The first connector 310 and the second connector 320 are connected for series or parallel connection of the first battery module 220 and the second battery module 20 of the second energy storage device 100.

[0086] The first connector 310 and the second connector 320 together form a ventilation duct 330. The ventilation duct 330 is provided with a switch 331. The switch 331 is used to control the opening and closing of the ventilation duct 330 so that the second housing 10 of the second energy storage device 100 connected to the first housing 210 can be connected or isolated, or to connect or isolate two adjacent first housings 210.

[0087] In the first energy storage device 200 of this application embodiment, the first connector 310 and the second connector 320 can electrically connect the first energy storage device 200 to the second energy storage device 100, or electrically connect multiple first energy storage devices 200. Based on this, the switch 331 provided in the ventilation duct 330 connects or isolates the second housing 10 of the second energy storage device 100 connected to the first housing 210, or connects or isolates two adjacent first housings 210, thereby enabling heat exchange between the first energy storage device 200 and the second energy storage device 100, or between multiple first energy storage devices 200. The working environment consistency between the energy storage devices is high, which is beneficial to improving the working performance of the battery module of the energy storage device, and the structure of the energy storage device is more compact.

[0088] Specifically, as shown in Figure 3, a receiving chamber 211 can be formed inside the first housing 210. The first battery module 220 can be installed in the receiving chamber 211 by screwing or snapping, so as to facilitate the installation and removal of the first battery module 220. The first housing 210 can be detachably connected to the second housing 10 by screwing or snapping. The first housing 210 can be made of metal such as aluminum alloy, so as to reduce the weight of the first housing 210 and extend its service life.

[0089] The first battery module 220 of the first energy storage device 200 can be electrically connected to the second battery module 20, thereby adding a battery module for energy storage to the energy storage system 1000.

[0090] As shown in Figure 4, in one embodiment, when the number of first energy storage devices 200 is one, the first housing 210 can be detachably connected to the second housing 10 by screwing or snapping, and the first battery module 220 can be connected in series or in parallel with the second battery module 20 to increase the energy storage capacity of the energy storage system 1000.

[0091] As shown in Figure 2, in another embodiment, when the number of first energy storage devices 200 is at least two, at least two first energy storage devices 200 are pluggably connected via a first connector 310 and a second connector 320, and one of the first energy storage devices 200 is pluggably connected to the second energy storage device 100. That is, the first housing 210 of the first energy storage device 200 adjacent to the second housing 10 can be detachably connected to the second housing 10, and the first housing 210 of other first energy storage devices 200 can be detachably connected to the first housing 210 of the adjacent first energy storage device 200. The first battery module 220 adjacent to the second battery module 20 is electrically connected to the second battery module 20, and other first battery modules 220 can be electrically connected to their adjacent first battery modules 220, thereby increasing the energy storage capacity of the energy storage system 1000 by adding battery modules.

[0092] The first connector 310 and the second connector 320 can be mounted on the housing by snap-fit ​​or screw connection. The second battery module 20 and the adjacent first battery module 220 can be connected in series or in parallel through the first connector 310 and the second connector 320; of course, when there are multiple first battery modules 220, the multiple first battery modules 220 can be connected in series and / or in parallel through the first connector 310 and the second connector 320.

[0093] In this embodiment, switch 331 can be disposed on the first connector 310, or on the second connector 320, or both the first connector 310 and the second connector 320 may have switch 331 disposed on both. Switch 331 can be connected to components such as a motor to achieve electric control of switch 331. Therefore, in addition to the conductive and / or communicative functions of the first connector 310 and the second connector 320, the first connector 310 and the second connector 320 also have air conduction functions, making the connection between the first energy storage device 200 and the second energy storage device 100, or between multiple first energy storage devices 200, more compact, and enabling heat exchange, so that the working environment of the battery module remains basically consistent.

[0094] In one embodiment, as shown in FIG4, when the temperature difference between the first battery module 220 and the second battery module 20 is large, the switch 331 can open the ventilation duct 330 to connect the first housing 210 and the second housing 10. At this time, the heat in the second housing 10 can flow into the first housing 210 through the ventilation duct 330, so as to realize the heat exchange between the first housing 210 and the second housing 10, thereby reducing the temperature difference between the first battery module 220 and the second battery module 20.

[0095] In another embodiment, as shown in FIG5, when the temperature difference between the first battery module 220 and the second battery module 20 is small, the switch 331 can close the ventilation duct 330 to isolate the internal spaces of the first housing 210 and the second housing 10 from each other, and the first battery module 220 and the second battery module 20 stop exchanging heat.

[0096] In another embodiment, when the temperature difference between two adjacent first battery modules 220 is large, the switch 331 can open the ventilation duct 330 to connect the two adjacent first housings 210. At this time, the heat in one of the first housings 210 can flow into the other first housing 210 through the ventilation duct 330, thereby achieving heat exchange between the two adjacent first housings 210 and reducing the temperature difference between the two adjacent first battery modules 220.

[0097] Please refer to Figure 6. In some embodiments, both the first connector 310 and the second connector 320 are provided with conductive terminals 340. The conductive terminals 340 are used to electrically connect the first battery module 220 and the second battery module 20. The conductive terminals 340 are located on one side of the ventilation duct 330. For example, the conductive terminals 340 can be arranged on one side of the ventilation duct 330 along the length direction of the first connector 310.

[0098] Thus, the conductive terminal 340 can realize the electrical connection of the first battery module 220 and the second battery module 20, or the electrical connection of two adjacent first battery modules 220, so that the first battery module 220 and the second battery module 20 can be connected in series or in parallel, or two adjacent first battery modules 220 can be connected in series or in parallel.

[0099] Referring to Figure 6, in some embodiments, both the first connector 310 and the second connector 320 are provided with communication terminals 350. The communication terminals 350 are used to enable communication between the first energy storage device 200 and the second energy storage device 100, or to enable communication between multiple second energy storage devices 100. Thus, the communication terminals 350 facilitate electrical management between the first energy storage device 200 and the second energy storage device 100, or between multiple second energy storage devices 100, enabling the energy storage system 1000 to meet charging and discharging requirements.

[0100] Referring again to Figure 3, in some embodiments, a second connector 320 is also provided on the first housing 210, with the first connector 310 and the second connector 320 located on different sides of the first housing 210. That is to say, the first housing 210 can simultaneously have the first connector 310 and the second connector 320. The different positions of the first connector 310 and the second connector 320 allow the first energy storage device 200 to be connected to two other energy storage devices, thereby expanding the energy storage capacity of the energy storage system 1000.

[0101] For example, one side of the first energy storage device 200 can be connected to the second energy storage device 100 via the first connector 310, and the other side can be connected to another first energy storage device 200 via the second connector 320. As another example, one side of the first energy storage device 200 can be connected to another first energy storage device 200 via the first connector 310, and the other side can be connected to yet another first energy storage device 200 via the second connector 320.

[0102] As shown in Figure 3, in some embodiments, the first housing 210 includes a top plate 212 and a bottom plate 213 opposite to the top plate 212. A first connector 310 is disposed on the top plate 212, and a second connector 320 is disposed on the bottom plate 213. Thus, after the first energy storage device 200 is connected to other energy storage devices, there can be more space between the multiple energy storage devices without interference. This also makes the first energy storage device 200 modular, allowing multiple first energy storage devices 200 to be interchanged in use, improving the convenience of using the first energy storage device 200.

[0103] Of course, in other embodiments, the first connector 310 and the second connector 320 may be respectively disposed on the top plate 212, bottom plate 213 and side plate of the same first housing 210. For example, the first connector 310 is disposed on the top plate 212 of the first housing 210 and the second connector 320 is disposed on the side plate of the housing.

[0104] As shown in Figure 3, in some embodiments, the first connector 310 protrudes from the top surface of the top plate 212, and the second connector 320 is recessed into the first housing 210 relative to the bottom surface of the bottom plate 213. Thus, when the first energy storage device 200 is connected to other energy storage devices, the first housing 210 can fit snugly against the housings of the other energy storage devices, making the structure between the two connected energy storage devices more compact. Furthermore, the recess of the second connector 320 into the first housing 210 allows the bottom plate 213 of the first energy storage device 200 to be placed more stably on a supporting surface such as the ground.

[0105] Referring to Figure 3, in some embodiments, the first energy storage device 200 includes a first heating element 230 disposed on the first battery module 220, which is used to heat the first battery module 220. Thus, the first heating element 230 can heat the first battery module 220 when its temperature is low, allowing the first battery module 220 to operate within an optimal temperature range, thereby ensuring its performance. In one example, the optimal operating temperature of the first battery module 220 can be any temperature value within the range of 5°C to 55°C, and is not limited thereto.

[0106] It should be noted that the first heating element 230 can be a heating film covering the first battery module 220. That is, the first heating element 230 can heat the aluminum busbar on the first battery module 220, and then transfer the heat to the battery cell of the first battery module 220 through the aluminum busbar on the first battery module 220, so as to heat the battery cell of the first battery module 220.

[0107] Referring to Figures 2 and 3, in some embodiments, the first energy storage device 200 includes a first fan 240 disposed within the first housing 210. Thus, the first fan 240 accelerates gas flow within the housing of the energy storage device, improving the heat exchange efficiency between the two energy storage devices.

[0108] It is understandable that the first fan 240 can be turned on when the ventilation duct 330 is open and turned off when the ventilation duct 330 is closed, thereby enabling faster heat exchange between the two energy storage devices through the ventilation duct 330.

[0109] Referring to Figures 7 and 8, in some embodiments, the second energy storage device 100 further includes an inverter 30 disposed in the second housing 10, and the inverter 30 is electrically connected to the second battery module 20. Thus, the inverter 30 and the second battery module 20 of the second energy storage device 100 are disposed in the same housing, making the structure of the second energy storage device 100 more compact, simplifying wiring when the inverter 30 and the second battery module 20 are electrically connected, and resulting in lower power consumption and overall energy consumption.

[0110] Referring to Figures 7 and 8, in some embodiments, the second energy storage device 100 may further include a heat insulation plate 40, which insulates the second housing 10 into a first chamber 11 and a second chamber 13. An inverter 30 is disposed within the first chamber 11, and a second battery module 20 is disposed within the second chamber 13. The heat insulation plate 40 is disposed within the second housing 10 and between the first chamber 11 and the second chamber 13. The heat insulation plate 40 is configured to either connect or block the first chamber 11 from the second chamber 13.

[0111] The inverter 30 can be installed in the first chamber 11 by welding or screwing. That is, when the inverter 30 is installed in the first chamber 11 by welding, the inverter 30 can be installed more securely in the first chamber 11. When the inverter 30 is installed in the first chamber 11 by screwing, the installation and removal of the inverter 30 can be facilitated.

[0112] The second battery module 20 can be installed in the second chamber 13 by welding or screwing. That is, when the second battery module 20 is installed in the second chamber 13 by welding, it can be installed more securely. When the second battery module 20 is installed in the second chamber 13 by screwing, it can be installed and removed more easily.

[0113] The heat insulation plate 40 can be installed inside the second housing 10 by welding or integral molding with the second housing 10, and is located between the first chamber 11 and the second chamber 13. The heat insulation plate 40 is configured to communicate or block the first chamber 11 and the second chamber 13 to achieve heat exchange between the first chamber 11 and the second chamber 13.

[0114] For example, the heat insulation plate 40 is provided with a through hole 41, which can be blocked or opened. When the through hole 41 is blocked, the first chamber 11 and the second chamber 13 are blocked. When the through hole 41 is opened, the first chamber 11 and the second chamber 13 are connected.

[0115] In one embodiment, as shown in Figure 7, when the temperature of the second battery module 20 is low, the heat insulation plate 40 can connect the first chamber 11 and the second chamber 13. At this time, the heat generated by the inverter 30 working in the first chamber 11 can flow through the heat insulation plate 40 to the second chamber 13 to heat the second battery module 20, so that the second battery module 20 can work at a suitable temperature. This effectively utilizes the heat generated by the inverter 30, eliminating the need for a separate heating device for heating the second battery module 20 outside the second housing 10. This results in lower energy consumption and ease of implementation.

[0116] In another embodiment, as shown in Figure 8, when the temperature of the second battery module 20 is normal, the heat insulation plate 40 can block the first chamber 11 from the second chamber 13. At this time, the heat generated by the inverter 30 working in the first chamber 11 is blocked by the heat insulation plate 40 and stops flowing to the second chamber 13. The heat insulation plate 40 can effectively isolate the heat of the first chamber 11, so that the temperature of the second battery module 20 in the second chamber 13 will not exceed the suitable temperature due to the influence of the first chamber 11. It should be noted that the normal temperature of the second battery module 20 can refer to any temperature value of the second battery module 20 within the range of 5℃ to 55℃, and is not limited here.

[0117] The second energy storage device 100 of this application embodiment provides a heat insulation plate 40 between the first chamber 11 and the second chamber 13 of the second housing 10. The heat insulation plate 40 connects or blocks the first chamber 11 and the second chamber 13, so that when the first chamber 11 and the second chamber 13 are connected, they can exchange heat with each other, so that the temperature in the first chamber 11 and the second chamber 13 tends to be within the optimal temperature range or is within the optimal temperature range. In this way, when the ambient temperature is low, the heat generated by the inverter 30 can be effectively used to heat the second battery module 20, reducing the power consumption of heating the battery module using a separate heating module, improving the working performance of the battery module, and resulting in lower overall energy consumption.

[0118] It should be noted that the preferred temperature range for the first chamber 11 is 5℃ to 125℃, and no limitation is imposed here. The preferred temperature range for the second chamber 13 is 5℃ to 55℃, and no limitation is imposed here.

[0119] Referring to Figures 7 and 8, in some embodiments, the second energy storage device 100 includes a second fan 50 disposed within the second housing 10. Thus, the second fan 50 accelerates gas flow within the second housing 10 of the energy storage device, improving the heat exchange efficiency between the first chamber 11 and the second chamber 13.

[0120] Referring to Figures 7 and 8, in some embodiments, the second energy storage device 100 includes a second heating element 60 disposed on the second battery module 20, which is used to heat the second battery module 20. Thus, the second heating element 60 can heat the second battery module 20 when the temperature is low, allowing the second battery module 20 to operate within an optimal temperature range, thereby ensuring the performance of the second battery module 20.

[0121] In some embodiments, the first energy storage device 200 is also used to receive an opening or closing command for the ventilation duct 330, and upon receiving the opening or closing command, to open or close the ventilation duct 330 according to the opening or closing command. In this way, the opening or closing of the ventilation duct 330 can be automatically controlled, which facilitates the management of heat between the energy storage systems 1000.

[0122] Specifically, referring to Figures 2 and 9, the energy storage system 1000 may include a controller 400, which may be located in the first energy storage device 200 or the second energy storage device 100. The controller 400 may issue commands to open or close the ventilation duct 330.

[0123] In some implementations, the controller 400 may issue an opening or closing command for the ventilation duct 330 based on the temperature of the second battery module 20.

[0124] In one example, as shown in Figure 9, when the controller 400 detects that the temperature of the second battery module 20 is high or low—for example, when the controller 400 detects that the temperature of the second battery module 20 is lower than a first predetermined temperature or higher than a second predetermined temperature—the controller 400 can issue an opening command for the ventilation duct 330. This opens the ventilation duct 330 between the first energy storage device 200 and the second energy storage device 100, thereby enabling heat exchange between the first housing 210 and the second housing 10. When the temperature of the second battery module 20 is low, the heat generated by the inverter 30 can be transferred to the second battery module 20 and at least one first battery module 220 through the through holes 41 on the heat insulation plate 40 and the ventilation duct 330, thereby raising the temperatures of both the first battery module 220 and the second battery module 20 to a better operating temperature.

[0125] When the temperature of the second battery module 20 is high, the heat generated by the second battery module 20 can be transferred to the first battery module 220 through the ventilation duct 330, thereby reducing the temperature difference between the first battery module 220 and the second battery module 20 and improving the performance of the cooperation between the first battery module 220 and the second battery module 20.

[0126] In another example, as shown in Figure 5, since the temperature rise of the first battery module 220 and the second battery module 20 is basically the same, when the controller 400 obtains that the temperature of the second battery module 20 is between the first predetermined temperature and the second predetermined temperature, it indicates that the temperature of the first battery module 220 and the second battery module 20 is suitable and no heat exchange is required. At this time, the controller 400 can issue a closing command for the ventilation duct 330, thereby closing the ventilation duct 330 between the first energy storage device 200 and the second energy storage device 100.

[0127] Referring to Figures 2 and 10, in some embodiments, the second housing 10 has a first chamber 11 and a second chamber 13 that are independent of each other. The second energy storage device 100 includes an inverter 30, a second battery module 20, and a heat insulation plate 40. The inverter 30 is disposed in the first chamber 11. The second battery module 20 is disposed in the second chamber 13. The heat insulation plate 40 is disposed in the second housing 10 and between the first chamber 11 and the second chamber 13. The heat insulation plate 40 is configured to either connect or block the first chamber 11 from the second chamber 13.

[0128] Specifically, as shown in Figure 2, the inverter 30 can be installed in the first chamber 11 by welding or screwing. That is, when the inverter 30 is installed in the first chamber 11 by welding, the inverter 30 can be installed more securely in the first chamber 11. When the inverter 30 is installed in the first chamber 11 by screwing, the installation and removal of the inverter 30 can be facilitated.

[0129] The second battery module 20 can be installed in the second chamber 13 by welding or screwing. That is, when the second battery module 20 is installed in the second chamber 13 by welding, it can be installed more securely. When the second battery module 20 is installed in the second chamber 13 by screwing, it can be installed and removed more easily.

[0130] The heat insulation plate 40 can be installed inside the second housing 10 by welding or integral molding with the second housing 10, and is located between the first chamber 11 and the second chamber 13. The heat insulation plate 40 is configured to communicate or block the first chamber 11 and the second chamber 13 to achieve heat exchange between the first chamber 11 and the second chamber 13.

[0131] It should be noted that, as shown in Figure 2, the second energy storage device 100 can be located above the first energy storage device 200. The second housing 10 can be made of metal such as aluminum alloy to reduce the weight of the second housing 10 and extend its service life. The heat insulation plate 40 can be made of heat insulation materials such as fiberglass, asbestos, or rock wool to give it good heat insulation performance. The inverter 30 and the second battery module 20 can be electrically connected. Figure 2 can be shown as a virtual structural diagram of the second housing 10 of the energy storage device 100 in a transparent state.

[0132] In one embodiment, as shown in FIG11, when the temperature of the second battery module 20 is low, the heat insulation plate 40 can connect the first chamber 11 and the second chamber 13. At this time, the heat generated by the inverter 30 working in the first chamber 11 can flow through the heat insulation plate 40 to the second chamber 13 to heat the second battery module 20, so that the second battery module 20 can work at a suitable temperature. This effectively utilizes the heat generated by the inverter 30, eliminating the need for a separate heating device for heating the second battery module 20 outside the second housing 10. This results in lower energy consumption and ease of implementation.

[0133] In another embodiment, as shown in Figure 10, when the temperature of the second battery module 20 is normal, the heat insulation plate 40 can block the first chamber 11 from the second chamber 13. At this time, the heat generated by the inverter 30 working in the first chamber 11 is blocked by the heat insulation plate 40 and stops flowing to the second chamber 13. The heat insulation plate 40 can effectively isolate the heat of the first chamber 11, so that the temperature of the second battery module 20 in the second chamber 13 will not exceed the suitable temperature due to the influence of the first chamber 11. It should be noted that the normal temperature of the second battery module 20 can refer to any temperature value of the second battery module 20 within the range of 10℃ to 35℃, and is not limited here.

[0134] Thus, the energy storage device 100 of this application integrates the inverter 30 in the first chamber 11 of the second housing 10 and the second battery module 20 in the second chamber 13 of the second housing 10, making the energy storage device 100 more compact in structure and simpler in wiring when the inverter 30 and the second battery module 20 are electrically connected, resulting in lower power consumption and overall energy consumption. Furthermore, this application provides a heat insulation plate 40 between the first chamber 11 and the second chamber 13 of the second housing 10. The heat insulation plate 40 connects or blocks the first chamber 11 and the second chamber 13, allowing them to exchange heat when connected. This ensures that the temperatures in the first chamber 11 and the second chamber 13 tend to be within or within the optimal temperature range. In this way, when the ambient temperature is low, the heat generated by the inverter 30 can be effectively used to heat the second battery module 20, reducing the energy consumption of heating the battery module using a separate heating module, improving the working performance of the battery module, and resulting in lower overall energy consumption.

[0135] It should be noted that the optimal temperature range for the first chamber 11 can be 85℃ to 125℃, and no limitation is imposed here. The optimal temperature range for the second chamber 13 can be 10℃ to 35℃, and no limitation is imposed here.

[0136] Furthermore, it is understood that in related technologies, a common approach is to install heat insulation measures between the inverter 30 and the battery module. When installing heat insulation measures between the inverter 30 and the battery module, a complete isolation method is usually adopted. However, when the ambient temperature is low, it is necessary to use an external heating module to heat the battery module. In this embodiment, a heat insulation plate 40 is installed in the second housing 10 to connect or block the first chamber 11 and the second chamber 13. When the ambient temperature is low, the heat insulation plate 40 can connect the first chamber 11 and the second chamber 13, and the heat generated by the inverter 30 can be used to heat the second battery module 20. This can effectively utilize the heat generated by the inverter 30, reduce the power consumption of using a separate heating device to heat the battery module, and result in lower overall energy consumption and ease of implementation.

[0137] In some embodiments, the second energy storage device 100 includes a fan. The fan is disposed in the first chamber 11 and / or the second chamber 13, and is used to create airflow between the first chamber 11 and the second chamber 13.

[0138] That is, the fan included in the second energy storage device 100 can be a second fan 50. The second fan 50 being located in the first chamber 11 and / or the second chamber 13 includes the following three possibilities:

[0139] (1) The second fan 50 is disposed in the first chamber 11. That is, when the heat insulation plate 40 connects the first chamber 11 and the second chamber 13, the second fan 50 disposed in the first chamber 11 can generate wind, thereby forming an airflow between the first chamber 11 and the second chamber 13, so as to realize heat exchange between the inverter 30 and the second battery module 20.

[0140] (2) The second fan 50 is installed in the second chamber 13. That is, when the heat insulation plate 40 connects the first chamber 11 and the second chamber 13, the second fan 50 installed in the second chamber 13 can generate wind to form an airflow between the first chamber 11 and the second chamber 13, so as to realize heat exchange between the inverter 30 and the second battery module 20.

[0141] (3) The second fan 50 is disposed in the first chamber 11 and the second chamber 13. When the heat insulation plate 40 connects the first chamber 11 and the second chamber 13, the second fan 50 disposed in the first chamber 11 and the second chamber 13 can generate air at the same time, forming a faster airflow between the first chamber 11 and the second chamber 13, thereby improving the heat exchange efficiency of the inverter 30 and the second battery module 20.

[0142] Referring to Figures 2 and 11, in some embodiments, the heat insulation plate 40 is provided with at least one through hole 41, which can be blocked or opened. When the through hole 41 is blocked, the first chamber 11 is blocked from the second chamber 13, and when the through hole 41 is opened, the first chamber 11 is connected to the second chamber 13.

[0143] Specifically, the heat insulation plate 40 may be provided with one or more through holes 41. When the heat insulation plate 40 is provided with multiple through holes 41, for example, there can be 2, 3, 4, 5, 6, 7 or 8, which is not limited here. It should be noted that when the heat insulation plate 40 is provided with two through holes 41, as shown in Figure 12, the two through holes 41 can be respectively provided on opposite sides of the heat insulation plate 40, so that when the through hole 41 is open, the airflow can flow into the second chamber 13 through one through hole 41 and then flow back to the first chamber 11 through the other through hole 41 to achieve airflow circulation. When the heat insulation plate 40 is provided with two or more through holes 41, the multiple through holes 41 can be arranged at intervals on the heat insulation plate 40, so that when the through holes 41 are open, the airflow flows evenly between the first chamber 11 and the second chamber 13 through the multiple through holes 41 to achieve heat exchange between the inverter 30 and the second battery module 20.

[0144] In one embodiment, when the through hole 41 is blocked, the heat insulation plate 40 blocks the first chamber 11 and the second chamber 13. At this time, the heat generated by the inverter 30 working in the first chamber 11 is blocked by the heat insulation plate 40 and stops flowing to the second chamber 13. The heat insulation plate 40 can effectively isolate the heat of the first chamber 11, so that the temperature of the second battery module 20 in the second chamber 13 will not exceed the suitable temperature due to the influence of the first chamber 11.

[0145] In another embodiment, when the through hole 41 is opened, the first chamber 11 can be connected to the second chamber 13. At this time, the heat generated by the inverter 30 working in the first chamber 11 can flow to the second chamber 13 through the through hole 41 to heat the second battery module 20 so that the second battery module 20 can work at a suitable temperature. This effectively utilizes the heat generated by the inverter 30, eliminating the need for a separate heating device for heating the second battery module 20 outside the second housing 10.

[0146] Referring to Figures 2 and 10, in some embodiments, the second housing 10 is provided with a vent 15, which is used to connect the external environment of the second housing 10 with the first chamber 11.

[0147] Specifically, a vent 15 may be provided on the chamber wall of the second housing 10 at a position relative to that of the first chamber 11. The number of vents 15 may be one or more. When there are multiple vents 15, for example, there may be 2, 3, 4, 5 or 6, which is not limited here.

[0148] In one embodiment, as shown in Figure 12, when the temperature of the inverter 30 is high, the vent 15 can be opened instead of being covered. At this time, the first chamber 11 can be connected to the external environment of the second enclosure 10 through the vent 15 so that the inverter 30 can be cooled down quickly.

[0149] Referring to Figure 2, in some embodiments, a heat sink 21 is provided on the inverter 30. The heat sink 21 is used to dissipate heat from the inverter 30. That is, the heat sink 21 can be installed on the inverter 30 by screwing or snapping, so as to facilitate the installation and removal of the heat sink 21. When the temperature of the inverter 30 is high, the heat sink 21 can dissipate heat from the inverter 30, so that the temperature of the heat sink 21 is at a more suitable temperature, thereby ensuring the operating efficiency of the inverter 30.

[0150] In some embodiments, the energy storage system 1000 further includes a controller 400. The controller 400 is used to detect the temperature of the second battery module 20 to obtain a first detection temperature, and to control the state of the heat insulation plate 40 according to the first detection temperature to connect or block the first chamber 11 from the second chamber 13.

[0151] Specifically, the controller 400 can be installed inside the second housing 10 by screwing or snapping. The controller 400 can detect the temperature of the second battery module 20 in real time and use this temperature as the first detection temperature.

[0152] In one embodiment, as shown in FIG11, when the first detected temperature obtained by the controller 400 is low, the controller 400 can control the through hole 41 on the heat insulation plate 40 to change from being blocked to being open, so that the first chamber 11 and the second chamber 13 are connected, the inverter 30 and the second battery module 20 exchange heat, and heat the second battery module 20.

[0153] In another embodiment, as shown in FIG10, when the first detected temperature obtained by the controller 400 is normal, the controller 400 can control the through hole 41 on the heat insulation plate 40 to change from open to closed, so that the first chamber 11 and the second chamber 13 are blocked, and the inverter 30 and the second battery module 20 stop exchanging heat.

[0154] In some embodiments, the controller 400 is configured to control the heat insulation plate 40 to connect the first chamber 11 and the second chamber 13 when the first detected temperature is lower than the first predetermined temperature, so that heat exchange can occur between the first chamber 11 and the second chamber 13. Alternatively, when the first detected temperature is greater than or equal to the first predetermined temperature, the controller 400 is configured to control the heat insulation plate 40 to block the first chamber 11 and the second chamber 13, so that heat exchange between the first chamber 11 and the second chamber 13 is stopped.

[0155] The first predetermined temperature can be, for example, 0℃, 1℃, 2℃, 3℃, 5℃, 6℃, 7℃, 8℃, 9℃ or 10℃, etc., and there are no restrictions here.

[0156] Specifically, in one embodiment, as shown in FIG11, the first predetermined temperature can be 0°C. If the first detected temperature obtained by the controller 400 is less than 0°C, the through hole 41 on the heat insulation plate 40 is controlled to change from being blocked to being open, so that the first chamber 11 and the second chamber 13 are connected. At the same time, the second fan 50 installed in the second housing 10 can be started to form an airflow between the first chamber 11 and the second chamber 13, so that the heat generated by the inverter 30 flows from the first chamber 11 through the heat insulation plate 40 into the second chamber 13 for heat exchange, so as to heat the second battery module 20.

[0157] In another embodiment, as shown in FIG10, the first predetermined temperature can be 0°C. When the first detected temperature obtained by the controller 400 is greater than or equal to 5°C, the controller 400 can control the through hole 41 on the heat insulation plate 40 to change from open to closed, so as to block the first chamber 11 and the second chamber 13. At the same time, the controller controls the second fan 50 set in the second housing 10 to turn off, so as to stop heat exchange between the first chamber 11 and the second chamber 13.

[0158] In some embodiments, the controller 400 is further configured to control the heating element 60 disposed on the second battery module 20 to heat the second battery module 20 when the first detected temperature is lower than the first predetermined temperature. That is, when the first detected temperature is lower than the first predetermined temperature, the controller 400 can control the heating element 60 disposed on the second battery module 20 to heat the second battery module 20, so that the temperature of the second battery module 20 is higher than the first predetermined temperature, allowing the second battery module 20 to operate within its optimal temperature range, thereby ensuring the performance of the second battery module 20. It should be noted that the heating element 60 can be a heating film covering the second battery module 20; that is, the heating element 60 can heat the aluminum busbar on the second battery module 20, and then transfer the heat to the battery cells of the second battery module 20 through the aluminum busbar, thereby heating the battery cells of the second battery module 20.

[0159] Referring to Figures 2 and 12, in some embodiments, the controller 400 is used to detect the temperature of the heat sink 21 on the inverter 30 to obtain a second detection temperature, and to control the ventilation port 15 of the second housing 10 to open when the second detection temperature is greater than a second predetermined temperature, so as to conduct heat exchange between the external environment of the second housing 10 and the first chamber 11, and the second predetermined temperature is greater than the first predetermined temperature.

[0160] The second predetermined temperature can be, for example, 70℃, 71℃, 72℃, 73℃, 74℃, 75℃, 76℃, 77℃, 78℃, 79℃ or 80℃, etc., and there are no restrictions here.

[0161] Specifically, in one embodiment, the second predetermined temperature can be, for example, 75°C. If the second detected temperature obtained by the controller 400 from the temperature of the heat sink 21 on the inverter 30 is greater than 75°C, it means that the heat dissipation effect of the heat sink 21 on the inverter 30 can no longer guarantee that the temperature of the inverter 30 is at the most suitable temperature, as shown in Figure 12. At this time, the controller 400 can control the ventilation port 15 set in the second housing 10 to open and control the second fan 50 set in the first chamber 11 to turn on, so as to connect the external environment of the second housing 10 with the first chamber 11, so that the external environment of the second housing 10 and the first chamber 11 can exchange heat, ensuring that the temperature of the inverter 30 is always at the most suitable temperature.

[0162] In another embodiment, as shown in FIG10, when the second detected temperature obtained by the controller 400 from the temperature of the heat sink 21 on the inverter 30 is less than or equal to 75°C, the controller 400 can control the ventilation port 15 provided in the second housing 10 to be shielded, and control the second fan 50 provided in the first chamber 11 to be turned off, so as to close the external environment of the second housing 10 to the first chamber 11, thereby stopping the external environment of the second housing 10 from exchanging heat with the first chamber 11.

[0163] In some embodiments, when there are at least two first energy storage devices 200, the first battery modules 220 in the two adjacent first energy storage devices 200 are electrically connected through a first connector 310 and a second connector 320 between the two adjacent first energy storage devices 200.

[0164] Specifically, when there are at least two first energy storage devices 200, the first connector 310 and the second connector 320 can be disposed between two adjacent first housings 210 by means of snap-fit ​​or welding. The two adjacent first energy storage devices 200 can be electrically connected through the first connector 310 and the second connector 320. Ventilation channels 330 can be formed on the first connector 310 and the second connector 320, which can be used to connect or block adjacent receiving chambers 211 in the receiving chambers 211 of the at least two first housings 210.

[0165] In one embodiment, when the temperature difference between two adjacent first battery modules 220 is large, the ventilation channels 330 of the first connector 310 and the second connector 320 can be connected to allow the two adjacent receiving chambers 211 to communicate. At this time, the heat of the two adjacent receiving chambers 211 can flow to each other through the ventilation channels 330 of the first connector 310 and the second connector 320, so as to realize heat exchange between the two adjacent receiving chambers 211 and reduce the temperature difference between the two adjacent first battery modules 220.

[0166] In another embodiment, when the temperature difference between two adjacent first battery modules 220 is small, the ventilation ducts 330 of the first connector 310 and the second connector 320 can be shut off to block the two adjacent receiving chambers 211, thereby stopping the heat exchange between the two adjacent first battery modules 220.

[0167] Referring to Figure 6, in some embodiments, the first connector 310 includes a first fixing portion 83, and the second connector 320 includes a second fixing portion 85. The first fixing portion 83 and the second fixing portion 85 are detachably connected. A ventilation duct 330 passes through the first fixing portion 83 and the second fixing portion 85. Conductive terminals 340 are provided on both the first fixing portion 83 and the second fixing portion 85. The first fixing portion 83 is fixed to the second housing 10. The second fixing portion 85 is fixed to the first housing 210. The conductive terminals 340 are used to electrically connect the second battery module 20 and the first battery module 220. Alternatively, the first fixing portion 83 and the second fixing portion 85 are respectively fixed to the first housing 210 of two adjacent first energy storage devices 200, so that the conductive terminals 340 electrically connect the first battery modules 220 in the two adjacent first energy storage devices 200.

[0168] That is, conductive terminals 340 can be respectively disposed on the first fixing part 83 and the second fixing part 85. The conductive terminals 340 disposed on the first fixing part 83 can be electrically connected to the conductive terminals 340 disposed on the second fixing part 85. Ventilation channels 330 can be provided on the first fixing part 83 and the second fixing part 85, penetrating the first fixing part 83 and the second fixing part 85.

[0169] In one embodiment, the first fixing part 83 can be fixed to the side of the second chamber 13 of the second housing 10 near the first housing 210, and the second fixing part 85 can be fixed to the side of the first housing 210 near the second battery module 20. The first fixing part 83 and the second fixing part 85 can be detachably connected by snap-fit ​​or screw-in. At this time, the second battery module 20 can be electrically connected to the conductive terminal 340 on the first fixing part 83, and the first battery module 220 can be electrically connected to the conductive terminal 340 on the second fixing part 85, so that the second battery module 20 and the first battery module 220 can be electrically connected by the conductive terminals 340 respectively provided on the first fixing part 83 and the second fixing part 85.

[0170] In another embodiment, the first fixing part 83 and the second fixing part 85 are respectively fixed to the first housing 210 of two adjacent first energy storage devices 200. The first fixing part 83 and the second fixing part 85 can be detachably connected by snap-fit ​​or screw-fit. At this time, the first battery module 220 of one of the two adjacent first energy storage devices 200 can be electrically connected to the conductive terminal 340 on the first fixing part 83, and the first battery module 220 of the other one of the two adjacent first energy storage devices 200 can be electrically connected to the conductive terminal 340 on the second fixing part 85, so that the first battery module 220 of the two adjacent first energy storage devices 200 can be electrically connected through the conductive terminals 340 respectively provided on the first fixing part 83 and the second fixing part 85.

[0171] Thus, the embodiments of this application provide a first connector 310 and a second connector 320 with conductive, signal conduction and airflow conduction functions between the second battery module 20 and the first battery module 220 or between two adjacent first battery modules 220 among a plurality of first battery modules 220. This results in a high degree of integration, which satisfies the conductive and signal conduction functions while also meeting the requirements of the heat pipe, and also has a low production cost and is convenient and quick to install.

[0172] Referring to Figures 2, 10, and 11, in some embodiments, the energy storage system 1000 further includes a controller 400. The controller 400 is used to detect the temperature of the second battery module 20 to obtain a first detected temperature, and, if the first detected temperature is lower than a first predetermined temperature, to control the heat insulation plate 40 to connect the first chamber 11 and the second chamber 13, so that heat exchange occurs between the first chamber 11 and the second chamber 13. It also controls the ventilation ducts 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the adjacent first energy storage device 200 to be in communication, so as to exchange heat between the second chamber 13 and the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13.

[0173] That is, in one embodiment, the first predetermined temperature can be, for example, 0°C. If the first detected temperature obtained by the controller 400 is less than 0°C, as shown in FIG16, the through hole 41 on the heat insulation plate 40 is controlled to change from being blocked to being open, so that the first chamber 11 and the second chamber 13 are connected. The second fan 50 disposed in the second housing 10 is controlled to start, and the ventilation duct 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the first energy storage device 200 adjacent to the second battery module 20 is controlled to be in the position of the ventilation duct 330. The system connects and controls the activation of the second fan 50 located in the receiving chamber 211 of the first housing 210 to form an airflow between the first chamber 11 and the second chamber 13 and between the receiving chamber 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13, thereby achieving heat exchange between the first chamber 11 and the second chamber 13 and between the receiving chamber 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13, and heating the second battery module 20 and the first battery module 220.

[0174] In another embodiment, the first predetermined temperature may be, for example, 0°C. When the first detected temperature obtained by the controller 400 is greater than or equal to 5°C, as shown in FIG14, the controller 400 may control the through hole 41 on the heat insulation plate 40 to change from open to closed, thereby blocking the first chamber 11 and the second chamber 13, and blocking the ventilation duct 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the first energy storage device 200 adjacent to the second battery module 20. The controller may also control the second fan 50 located in the second housing 10 and the second fan 50 located in the receiving chamber 211 of the first housing 210 to close, so that heat exchange between the first chamber 11 and the second chamber 13 and between the second chamber 13 and the receiving chamber 211 of the first housing 210 of the adjacent first energy storage device 200 is stopped.

[0175] In some embodiments, the energy storage system 1000 further includes a controller 400. The controller 400 is configured to detect the temperature of the second battery module 20 to obtain a first detected temperature, and, if the first detected temperature is lower than a first predetermined temperature, control the heat insulation plate 40 to connect the first chamber 11 and the second chamber 13 to allow heat exchange between the first chamber 11 and the second chamber 13, and control the ventilation ducts 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the adjacent first energy storage device 200 to be connected to allow heat exchange between the second chamber 13 and the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13, and control the ventilation ducts 330 of the first connector 310 and the second connector 320 located between two adjacent first energy storage devices 200 to allow heat exchange between two adjacent first housings 210.

[0176] That is, in one embodiment, the first predetermined temperature can be, for example, 0°C. If the first detected temperature obtained by the controller 400 is less than 0°C, the controller 400 controls the through hole 41 on the heat insulation plate 40 to change from being blocked to being open, so that the first chamber 11 and the second chamber 13 are connected. The controller controls the ventilation duct 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the first energy storage device 200 adjacent to the second battery module 20 to be connected. The controller controls the ventilation duct 330 of the first connector 310 and the second connector 320 located between two adjacent first energy storage devices 200 to be connected. The controller also controls the second fan 50 installed in the second housing 10 and the fan installed in the first housing 10 to be connected. The second fan 50 inside the receiving chamber 211 of 210 is activated to form airflow between the first chamber 11 and the second chamber 13, between the receiving chamber 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13, and between the receiving chambers 211 of the first housing 210 of two adjacent first energy storage devices 200. This achieves heat exchange between the first chamber 11 and the second chamber 13, between the receiving chambers 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13, and between the receiving chambers 211 of the first housing 210 of two adjacent first energy storage devices 200, thereby heating the second battery module 20 and multiple first battery modules 220.

[0177] In another embodiment, the first predetermined temperature may be, for example, 0°C. If the first detected temperature obtained by the controller 400 is greater than or equal to 5°C, the controller 400 may control the through hole 41 on the heat insulation plate 40 to change from opening to blocking, thus blocking the first chamber 11 and the second chamber 13. The controller may also control the ventilation duct 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the first energy storage device 200 adjacent to the second battery module 20 to be blocked. The controller may also control the ventilation duct 330 of the first connector 310 and the second connector 320 located between two adjacent first energy storage devices 200 to be blocked. Furthermore, the controller may control the second fan 50 located in the second housing 10 and the first fan 240 located in the receiving chamber 211 of the first housing 210 to be closed, so that heat exchange between the first chamber 11 and the second chamber 13, between the receiving chamber 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13, and between the receiving chambers 211 of the first housing 210 of the two adjacent first energy storage devices 200, is stopped.

[0178] In some embodiments, the controller 400 is further configured to control a heating element disposed on the first battery module 220 to heat the first battery module 220 when the first detected temperature is lower than the first predetermined temperature. It should be noted that the heating element on the first battery module 220 may refer to the first heating element 230. That is, when the first detected temperature is lower than the first predetermined temperature, the controller 400 can control the first heating element 230 disposed on the first battery module 220 to heat the first battery module 220, so that the temperature of the first battery module 220 is higher than the first predetermined temperature, allowing the first battery module 220 to operate within its optimal temperature range, thereby ensuring the performance of the first battery module 220. It should also be noted that the first heating element 230 may be a heating film covering the first battery module 220. Specifically, the first heating element 230 can heat the aluminum busbar on the first battery module 220, and then transfer the heat to the battery cells of the first battery module 220 through the aluminum busbar, thereby heating the battery cells of the first battery module 220.

[0179] In some embodiments, the energy storage system 1000 further includes a controller 400. The controller 400 is used to detect the temperature of the second battery module 20 to obtain a first detection temperature, and, if the first detection temperature is greater than a third predetermined temperature, to control the first chamber 11 and the second chamber 13 to remain blocked, and to control the ventilation ducts 330 of the first connector 310 and the second connector 320 to be open so that the second chamber 13 and the first housing 210 adjacent to the second chamber 13 can exchange heat, and if the number of first housings 210 is at least two, to control the heat exchange of two adjacent first housings 210 among the at least two first housings 210, wherein the third predetermined temperature is greater than the first predetermined temperature.

[0180] The third predetermined temperature can be, for example, 40℃, 41℃, 42℃, 43℃, 44℃, 45℃, 46℃, 47℃, 48℃, 49℃ or 50℃, and there are no restrictions here.

[0181] Specifically, in one embodiment, the third predetermined temperature can be, for example, 45°C. If the controller 400 detects a first temperature greater than 45°C by detecting the temperature of the second battery module 20, the controller 400 controls the through holes 41 on the heat insulation plate 40 to remain blocked so that the first chamber 11 and the second chamber 13 remain blocked, and controls the ventilation channels 330 of the first connector 310 and the second connector 320 to be open, and controls the second fan 50 provided in the second chamber 13 and the receiving chamber 211 of the first housing 210 to be turned on so that the second chamber 13 and the receiving chamber 211 of the first housing 210 adjacent to the second chamber 13 can exchange heat to reduce the temperature difference between the second battery module 20 and the first battery module 220.

[0182] In another embodiment, the third predetermined temperature can be, for example, 45°C. If there are at least two receiving chambers 211 in the first housing 210, and the controller 400 detects a first temperature greater than 45°C by detecting the temperature of the second battery module 20, then the controller 400 can control the through holes 41 on the heat insulation plate 40 to remain blocked, thus blocking the first chamber 11 and the second chamber 13. It can also control the ventilation channels 330 of the first connector 310 and the second connector 320 located between the second chamber 13 and the adjacent receiving chamber 211 of the first housing 210, and the... The ventilation duct 330 of the first connector 310 and the second connector 320 between two adjacent receiving cavities is connected, and the second fan 50 that controls the receiving cavities 211 of the second chamber 13 and the first housing 210 are turned on, so that the second chamber 13 and the receiving cavities 211 of the first housing 210 adjacent to the second chamber 13 can exchange heat, and the receiving cavities 211 of at least two first housings 210 can exchange heat, so as to reduce the temperature difference between the second battery module 20 and at least two first battery modules 220.

[0183] In another embodiment, if the first detected temperature obtained by the controller 400 from the temperature of the second battery module 20 is less than the third predetermined temperature, the controller 400 can control the through hole 41 on the heat insulation plate 40 to remain blocked so that the first chamber 11 and the second chamber 13 remain blocked, and control the ventilation duct 330 of the first connector 310 and the second connector 320 disposed between the second chamber 13 and the adjacent first housing 210's receiving chamber 211 and the ventilation duct 330 of the first connector 310 and the second connector 320 disposed between two adjacent receiving chambers to be blocked, and control the second fan 50 disposed between the second chamber 13 and the first housing 210's receiving chamber 211 to be turned off so that the second chamber 13 and the first housing 210's receiving chamber 211 adjacent to the second chamber 13 stop heat exchange, and at least two adjacent first housing 210's receiving chambers 211 undergo body heat exchange.

[0184] Referring to Figure 2, in some embodiments, heating elements are provided on the second battery module 20 and / or the first battery module 220. The heating elements are used to heat the second battery module 20 and the first battery module 220.

[0185] That is, the heating element may include a first heating element 230 and a second heating element 60. The second battery module 20 and / or the first battery module 220 may have heating elements in the following three cases:

[0186] (1) A second heating element 60 is provided on the second battery module 20. That is, when the temperature of the second battery module 20 is low, the second heating element 60 provided on the second battery module 20 can be used to heat the second battery module 20 so that the temperature of the second battery module 20 is always within the optimal temperature range, thereby ensuring the performance of the second battery module 20.

[0187] (2) A first heating element 230 is provided on the first battery module 220. That is, when the temperature of the first battery module 220 is low, the first heating element 230 provided on the first battery module 220 can be used to heat the first battery module 220 so that the temperature of the first battery module 220 is always in the optimal temperature range, thereby ensuring the performance of the first battery module 220.

[0188] (3) A second heating element 60 is provided on the second battery module 20, and a first heating element 230 is provided on the first battery module 220. That is, when the temperatures of the second battery module 20 and the first battery module 220 are low, the second heating element 60 provided on the second battery module 20 can be controlled to heat the second battery module 20, and the first heating element 230 provided on the first battery module 220 can be controlled to heat the first battery module 220, so that the temperatures of the second battery module 20 and the first battery module 220 are always within the optimal temperature range, thereby ensuring the performance of the second battery module 20 and the first battery module 220.

[0189] Referring to Figures 2 and 17, this application also provides a thermal management method for an energy storage system 1000. The energy storage system 1000 includes a first energy storage device 200 and a second energy storage device 100. The first energy storage device 200 includes a first housing 210 and a first battery module 220, with the first battery module 220 disposed within the first housing 210. The second energy storage device 100 includes a second housing 10, an inverter 30, a second battery module 20, and a heat insulation plate 40. The second housing 10 has mutually independent first chambers 11 and 13. The inverter 30 is disposed within the first chamber 11. The second battery module 20 is disposed within the second chamber 13. The heat insulation plate 40 is disposed within the second housing 10 and between the first chamber 11 and the second chamber 13. The thermal management method includes:

[0190] 01: Detect the temperature of the second battery module to obtain the first detection temperature;

[0191] 02: Based on the first detected temperature, control the state of the heat insulation plate to make the first chamber and the second chamber connected or blocked.

[0192] Specifically, in one embodiment, when the temperature of the second battery module 20 is detected to be low, the through hole 41 on the heat insulation plate 40 can be controlled to change from being blocked to being open, so that the first chamber 11 and the second chamber 13 can be connected, and the inverter 30 can exchange heat with the second battery module 20 to heat the second battery module 20.

[0193] In another embodiment, when the temperature of the second battery module 20 is detected to be normal, the through hole 41 on the heat insulation plate 40 can be controlled to change from open to closed, so that the first chamber 11 and the second chamber 13 are blocked, and the inverter 30 and the second battery module 20 stop exchanging heat.

[0194] Thus, the thermal management method of this application obtains a first detection temperature by detecting the temperature of the second battery module 20, and controls the state of the heat insulation plate 40 according to the first detection temperature to connect or block the first chamber 11 and the second chamber 13, so that the temperature in the first chamber 11 and the second chamber 13 tends to be within the optimal temperature range or is within the optimal temperature range. In this way, when the ambient temperature is low, the heat generated by the inverter 30 can be effectively used to heat the second battery module 20, reducing the power consumption of heating the battery module using a separate heating module, improving the working performance of the battery module, and reducing the overall energy consumption of the machine.

[0195] Please refer to Figure 18. In some embodiments, the thermal management method includes:

[0196] 03: When the first detected temperature is lower than the first predetermined temperature, control the heat insulation plate to connect the first chamber and the second chamber, so that heat exchange can occur between the first chamber and the second chamber; or

[0197] 04: When the first detected temperature is greater than or equal to the first predetermined temperature, the heat insulation plate is controlled to block the first chamber from the second chamber, so that heat exchange between the first chamber and the second chamber stops.

[0198] The first predetermined temperature can be, for example, 0℃, 1℃, 2℃, 3℃, 5℃ or 6℃, etc., and there are no restrictions here.

[0199] Specifically, in one embodiment, as shown in FIG12, the first predetermined temperature can be 0°C. If the first detected temperature obtained at this time is less than 0°C, the through hole 41 on the heat insulation plate 40 is controlled to change from being blocked to being open, so that the first chamber 11 and the second chamber 13 are connected. At the same time, the second fan 50 set in the second housing 10 can be started to form an airflow between the first chamber 11 and the second chamber 13, so that the heat generated by the inverter 30 flows from the first chamber 11 through the heat insulation plate 40 into the second chamber 13 for heat exchange, so as to heat the second battery module 20.

[0200] In another embodiment, as shown in FIG10, when the obtained first detection temperature is greater than or equal to 0°C, the through hole 41 on the heat insulation plate 40 can be controlled to change from open to closed, blocking the first chamber 11 and the second chamber 13, while the second fan 50 installed in the second housing 10 is controlled to be turned off, so that heat exchange between the first chamber 11 and the second chamber 13 stops.

[0201] Please refer to Figure 19. In some embodiments, the thermal management method includes:

[0202] 05: When the first detected temperature is lower than the first predetermined temperature, control the heating element installed on the second battery module to heat the second battery module.

[0203] Specifically, the heating element on the second battery module can refer to the second heating element 60. When the first detected temperature is lower than the first predetermined temperature, the second heating element 60 disposed on the second battery module 20 can be controlled to heat the second battery module 20, so that the temperature of the second battery module 20 is higher than the first predetermined temperature, so that the second battery module 20 operates within the optimal temperature range, thereby ensuring the performance of the second battery module 20.

[0204] Referring to Figure 20, in some embodiments, the thermal management method includes:

[0205] 06: Detect the temperature of the heat sink on the inverter to obtain the second detection temperature;

[0206] 07: When the second detection temperature is greater than the second predetermined temperature, the ventilation port of the second chamber is opened to connect the external environment of the second chamber with the first chamber, so that the external environment of the second chamber and the first chamber can exchange heat, and the second predetermined temperature is greater than the first predetermined temperature.

[0207] The second predetermined temperature can be, for example, 70℃, 71℃, 72℃, 73℃, 74℃, 75℃, 76℃, 77℃, 78℃, 79℃ or 80℃, etc., and there are no restrictions here.

[0208] Specifically, in one embodiment, the second predetermined temperature can be, for example, 75°C. First, the temperature of the heat sink 21 on the inverter 30 is detected to obtain the second detected temperature. If the second detected temperature is greater than 75°C, it means that the heat sink 21 can no longer ensure that the inverter 30 is at the most suitable temperature, as shown in Figure 12. At this time, the ventilation port 15 of the second housing 10 can be opened, and the second fan 50 of the first chamber 11 can be turned on to connect the external environment of the second housing 10 with the first chamber 11, so that the external environment of the second housing 10 and the first chamber 11 can exchange heat, ensuring that the temperature of the inverter 30 is always at the most suitable temperature.

[0209] In another embodiment, the temperature of the heat sink 21 on the inverter 30 is first detected to obtain a second detected temperature. If the second detected temperature is greater than 75°C, or if the second detected temperature is less than or equal to 75°C, as shown in Figure 10, the ventilation opening 15 in the second housing 10 can be blocked, and the second fan 50 in the first chamber 11 can be turned off to close the external environment of the second housing 10 to the first chamber 11, so that the external environment of the second housing 10 stops exchanging heat with the first chamber 11.

[0210] Please refer to Figures 2 and 21. In some embodiments, the thermal management method includes:

[0211] 08: When the first detected temperature is lower than the first predetermined temperature, the heat insulation plate is controlled to connect the first chamber and the second chamber so that heat exchange can be carried out between the first chamber and the second chamber. The ventilation ducts of the first connector and the second connector located between the second battery module and the first energy storage device adjacent to the second battery module are controlled to be connected so as to exchange heat between the second chamber and the first housing adjacent to the second chamber.

[0212] Specifically, in one embodiment, the first predetermined temperature can be, for example, 0°C. If the first detected temperature is less than 0°C, as shown in FIG16, the through hole 41 on the heat insulation plate 40 is controlled to change from being blocked to being open, so that the first chamber 11 and the second chamber 13 are connected. The second fan 50 disposed in the second housing 10 is also controlled to start, and the ventilation duct 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the first energy storage device 200 adjacent to the second battery module 20 is controlled to be connected. The first fan 240, located in the receiving chamber 211 of the first housing 210, is activated to form an airflow between the first chamber 11 and the second chamber 13 and between the second chamber 13 and the receiving chamber 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13. This achieves heat exchange between the first chamber 11 and the second chamber 13 and between the second chamber 13 and the receiving chamber 211 of the first housing 210 of the first energy storage device 200, thereby heating the second battery module 20 and the first battery module 220.

[0213] In another embodiment, the first predetermined temperature can be, for example, 0°C. When the first detected temperature is greater than or equal to 5°C, as shown in FIG6, the through hole 41 on the heat insulation plate 40 can be controlled to change from open to closed, blocking the first chamber 11 and the second chamber 13, and the ventilation duct 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the first energy storage device 200 adjacent to the second battery module 20 is blocked. The second fan 50 provided in the second housing 10 and the first fan 240 provided in the receiving chamber 211 of the first housing 210 are controlled to be turned off, so that heat exchange between the first chamber 11 and the second chamber 13 and between the second chamber 13 and the receiving chamber 211 of the first housing 210 of the adjacent first energy storage device 200 is stopped.

[0214] Referring to Figure 22, in some embodiments, the thermal management method further includes:

[0215] 09: When the first detected temperature is lower than the first predetermined temperature, the heat insulation plate is controlled to connect the first chamber and the second chamber so that heat exchange can occur between the first chamber and the second chamber. The ventilation ducts of the first connector and the second connector located between the second battery module and the adjacent first energy storage device are controlled to be connected so that heat exchange can occur between the second chamber and the first housing adjacent to the second chamber. The ventilation ducts of the first connector and the second connector located between two adjacent first energy storage devices are controlled to be connected so that heat exchange can occur between two adjacent first housings in at least two first housings.

[0216] Specifically, in one embodiment, the first predetermined temperature can be, for example, 0°C. If the obtained first detected temperature is less than 0°C, the through hole 41 on the heat insulation plate 40 is controlled to change from being blocked to being open, so that the first chamber 11 and the second chamber 13 are connected. The ventilation duct 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the first energy storage device 200 adjacent to the second battery module 20 is controlled to be connected. The ventilation duct 330 of the first connector 310 and the second connector 320 located between two adjacent first energy storage devices 200 is controlled to be connected. The second fan 50 disposed in the second housing 10 and the receiving cavity disposed in the first housing 210 are also controlled. The first fan 240 inside chamber 211 is activated to form airflow between the first chamber 11 and the second chamber 13, the receiving chamber 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13, and the receiving chambers 211 of the first housing 210 of two adjacent first energy storage devices 200. This achieves heat exchange between the first chamber 11 and the second chamber 13, between the receiving chambers 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13, and between the receiving chambers 211 of the first housing 210 of two adjacent first energy storage devices 200, thereby heating the second battery module 20 and multiple first battery modules 220.

[0217] In another embodiment, the first predetermined temperature can be, for example, 0°C. When the obtained first detection temperature is greater than or equal to 5°C, the through hole 41 on the heat insulation plate 40 can be controlled to open instead of being blocked, thus blocking the first chamber 11 from the second chamber 13. The ventilation duct 330 of the first connector 310 and the second connector 320 located between the second battery module 20 and the first energy storage device 200 adjacent to the second battery module 20 can be controlled to be blocked. The ventilation duct 330 of the first connector 310 and the second connector 320 located between two adjacent first energy storage devices 200 can be controlled to be blocked. The second fan 50 located in the second housing 10 and the first fan 240 located in the receiving chamber 211 of the first housing 210 can be controlled to be closed, so that heat exchange between the first chamber 11 and the second chamber 13, between the receiving chamber 211 of the first housing 210 of the first energy storage device 200 adjacent to the second chamber 13 and between the receiving chambers 211 of the first housing 210 of the two adjacent first energy storage devices 200 can be stopped.

[0218] Referring to Figure 23, in some embodiments, the thermal management method further includes:

[0219] 001: When the first detected temperature is lower than the first predetermined temperature, the heating element installed on the first battery module is controlled to heat the first battery module.

[0220] Specifically, the heating element on the first battery module can refer to the first heating element 230. When the first detected temperature is lower than the first predetermined temperature, the first heating element 230 disposed on the first battery module 220 can be controlled to heat the first battery module 220, so that the temperature of the first battery module 220 is higher than the first predetermined temperature, so that the first battery module 220 operates within the optimal temperature range, thereby ensuring the performance of the first battery module 220.

[0221] Referring to Figure 24, in some embodiments, the thermal management method further includes:

[0222] 002: When the first detected temperature is greater than the third predetermined temperature, the first chamber and the second chamber are kept blocked, and the ventilation ducts of the first connector of the first energy storage device and the second connector of the second energy storage device are opened to allow heat exchange between the second chamber and the first box adjacent to the second chamber. When there are at least two first boxes, the adjacent two first boxes in the at least two first boxes are controlled to exchange heat, and the third predetermined temperature is greater than the first predetermined temperature.

[0223] The third predetermined temperature can be, for example, 40℃, 41℃, 42℃, 43℃, 44℃, 45℃, 46℃, 47℃, 48℃, 49℃ or 50℃, and there are no restrictions here.

[0224] Specifically, in one embodiment, the third predetermined temperature can be, for example, 45°C. If the first detected temperature obtained by detecting the temperature of the second battery module 20 is greater than 45°C, the through holes 41 on the heat insulation plate 40 can be controlled to remain blocked so that the first chamber 11 and the second chamber 13 remain blocked. The ventilation channels 330 of the first connector 310 of the first energy storage device 200 and the second connector 320 of the second energy storage device 100 can be opened. The second fan 50 provided in the second chamber 13 and the receiving chamber 211 of the first housing 210 can be turned on so that the second chamber 13 and the receiving chamber 211 of the first housing 210 adjacent to the second chamber 13 can exchange heat to reduce the temperature difference between the second battery module 20 and the first battery module 220.

[0225] In another embodiment, the third predetermined temperature can be, for example, 45°C. If there are at least two receiving chambers 211 in the first housing 210, and the controller 400 detects a first temperature greater than 45°C by detecting the temperature of the second battery module 20, the through holes 41 on the heat insulation plate 40 can be controlled to remain blocked, thus blocking the first chamber 11 and the second chamber 13. Furthermore, the ventilation channels 330 of the first connector 310 and the second connector 320 located between the second chamber 13 and the adjacent receiving chambers 211 of the first housing 210 can be controlled, as well as the ventilation channels 330 located between the two adjacent chambers 310 and the second connector 320. The ventilation duct 330 of the first connector 310 and the second connector 320 between the receiving chambers 211 is connected, and the second fan 50 controlling the receiving chambers 211 of the second chamber 13 and the first housing 210 is turned on, so that the second chamber 13 and the receiving chambers 211 of the first housing 210 adjacent to the second chamber 13 can exchange heat, and the receiving chambers 211 of two adjacent first housings 210 can exchange heat, so as to reduce the temperature difference between the second battery module 20 and the at least two first battery modules 220.

[0226] In another embodiment, if the first detected temperature obtained by detecting the temperature of the second battery module 20 is less than the third predetermined temperature, the through holes 41 on the heat insulation plate 40 can be controlled to remain blocked so that the first chamber 11 and the second chamber 13 remain blocked. The ventilation channels 330 of the first connector 310 and the second connector 320 disposed between the second chamber 13 and the adjacent first housing 210's receiving chamber 211 and the ventilation channels 330 of the first connector 310 and the second connector 320 disposed between two adjacent receiving chambers 211 can be blocked. The second fan 50 disposed between the second chamber 13 and the receiving chamber 211 of the first housing 210 can be controlled to turn off so that the second chamber 13 and the receiving chamber 211 of the first housing 210 adjacent to the second chamber 13 stop heat exchange, and the receiving chambers 211 of the first housing 210 in at least two first housing 210s exchange heat in bulk.

[0227] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An energy storage system, wherein, The energy storage system comprises a first energy storage device and a second energy storage device, The first energy storage device comprises a first box body and a first battery module, the first battery module is arranged in the first box body, and a first connector is arranged on the first box body; The second energy storage device comprises a second box body and a second battery module arranged in the second box body, and a second connector is arranged on the second box body; The first connector is used for pluggable connection with the second connector arranged on the second box body of the second energy storage device or other first energy storage device, the first connector and the second connector are connected, and the first battery module and the second battery module of the second energy storage device are connected in series or parallel; The first connector and the second connector jointly form a ventilation channel, and the ventilation channel is provided with a switch for controlling the ventilation channel to be opened or closed to communicate or isolate the second box body connected with the first box body or to communicate or isolate two adjacent first box bodies.

2. The energy storage system of claim 1, wherein, The first connector and the second connector are both provided with conductive terminals for electrically connecting the first battery module and the second battery module, and the conductive terminals are located on one side of the ventilation channel.

3. The energy storage system of claim 2, wherein, The first connector and the second connector are both provided with communication terminals for communication between the first energy storage device and the second energy storage device or communication among a plurality of second energy storage devices.

4. The energy storage system of claim 1, wherein, The first box body is also provided with the second connector, and the first connector and the second connector are located on different sides of the first box body.

5. The energy storage system of claim 4, wherein, The first box body comprises a top plate and a bottom plate opposite to the top plate, the first connector is arranged on the top plate, and the second connector is arranged on the bottom plate.

6. The energy storage system of claim 5, wherein, The first connector protrudes from the top surface of the top plate, and the second connector is recessed into the first box body relative to the bottom surface of the bottom plate.

7. The energy storage system of claim 1, wherein, The first energy storage device is also used for receiving an opening or closing instruction of the ventilation channel, and opening or closing the ventilation channel according to the opening or closing instruction after receiving the opening or closing instruction.

8. The energy storage system of claim 7, wherein, The number of the first energy storage devices is at least two, and at least two first energy storage devices are pluggably connected through the first connector and the second connector, wherein one of the first energy storage devices is pluggably connected with the second energy storage device.

9. The energy storage system of claim 8, wherein, The second energy storage device further comprises an inverter arranged in the second box body, and the inverter is electrically connected with the second battery module.

10. The energy storage system of claim 1, wherein, The second box body is provided with a first chamber and a second chamber which are independent of each other, the second energy storage device further comprises an inverter, a second battery module and a heat insulation plate, the inverter is arranged in the first chamber, the second battery module is arranged in the second chamber, the heat insulation plate is arranged in the second box body and between the first chamber and the second chamber, and the heat insulation plate is configured to communicate or block the first chamber and the second chamber.

11. The energy storage system of claim 10, wherein, The second energy storage device comprises a fan arranged in the first chamber and / or the second chamber, and the fan is configured to form an air flow between the first chamber and the second chamber.

12. The energy storage system of claim 10, wherein, The heat insulation plate is provided with at least one through hole, and the through hole can be shielded or opened, and when the through hole is shielded, the first chamber is blocked from the second chamber, and when the through hole is opened, the first chamber is communicated with the second chamber.

13. The energy storage system of claim 10, wherein, The second box is provided with a ventilation opening for communicating the external environment of the second box with the first chamber.

14. The energy storage system of claim 10, wherein, The inverter is provided with a heat sink for dissipating heat from the inverter.

15. The energy storage system of claim 10, wherein, The energy storage system further comprises a controller configured to detect a first detection temperature of the second battery module, and control the state of the heat insulation plate to communicate or block the first chamber from the second chamber according to the first detection temperature.

16. The energy storage system of claim 15, wherein, The controller is configured to control the heat insulation plate to communicate the first chamber with the second chamber when the first detection temperature is less than a first predetermined temperature, so as to exchange heat between the first chamber and the second chamber, or control the heat insulation plate to block the first chamber from the second chamber when the first detection temperature is greater than or equal to the first predetermined temperature, so as to stop heat exchange between the first chamber and the second chamber.

17. The energy storage system of claim 15, wherein, The controller is further configured to control a heating element arranged on the second battery module to heat the second battery module when the first detection temperature is less than the first predetermined temperature.

18. The energy storage system of claim 16, wherein, The controller is configured to detect a second detection temperature of the heat sink on the inverter, and control the ventilation opening of the second box to be opened to communicate the external environment of the second box with the first chamber when the second detection temperature is greater than a second predetermined temperature, so as to exchange heat between the external environment of the second box and the first chamber, and the second predetermined temperature is greater than the first predetermined temperature.

19. The energy storage system of claim 10, wherein, When the number of the first energy storage devices is at least two, the first battery modules in two adjacent first energy storage devices are electrically connected through the first connector and the second connector between the two adjacent first energy storage devices.

20. The energy storage system of claim 19, wherein, The energy storage system further comprises a controller configured to detect a first detection temperature of the second battery module, and control the heat insulation plate to communicate the first chamber with the second chamber when the first detection temperature is less than a first predetermined temperature, so as to exchange heat between the first chamber and the second chamber, and control the ventilation passage of the first connector and the second connector between the second battery module and the first energy storage device adjacent to the second battery module to be communicated, so as to exchange heat between the second chamber and the first box adjacent to the second chamber.

21. The energy storage system of claim 19, wherein, The energy storage system further comprises a controller configured to detect a temperature of the second battery module to obtain a first detection temperature, and in a case that the first detection temperature is less than a first predetermined temperature, control the heat insulation plate to make the first chamber and the second chamber communicate with each other to exchange heat between the first chamber and the second chamber, and control the ventilation passages of the first connector and the second connector located between the second battery module and the first energy storage device adjacent to the second battery module to communicate with each other to exchange heat between the second chamber and the first box adjacent to the second chamber, and control the ventilation passages of the first connector located between two adjacent first energy storage devices to exchange heat between the two adjacent first boxes in the at least two first boxes.

22. The energy storage system of claim 20, wherein, The controller is further configured to control a heating element arranged on the first battery module to heat the first battery module in a case that the first detection temperature is less than the first predetermined temperature.

23. The energy storage system of claim 19, wherein, The energy storage system further comprises a controller configured to detect a temperature of the second battery module to obtain a first detection temperature, and in a case that the first detection temperature is greater than a third predetermined temperature, control the first chamber and the second chamber to remain blocked, and control the ventilation passages of the first connector and the second connector to be open to exchange heat between the second chamber and the first box adjacent to the second chamber, and in a case that the number of the first boxes is at least two, control two adjacent first boxes in the at least two first boxes to exchange heat.

24. The energy storage system according to claim 10, wherein, The second battery module and / or the first battery module is provided with a heating element configured to heat the second battery module and the first battery module.

25. A thermal management method for an energy storage system, wherein, The energy storage system comprises a second energy storage device and a first energy storage device, the first energy storage device comprises a first box and a first battery module, the first battery module is arranged in the first box, the second energy storage device comprises a second box, an inverter, a second battery module and a heat insulation plate, the second box is provided with a first chamber and a second chamber which are independent of each other, the inverter is arranged in the first chamber, the second battery module is arranged in the second chamber, the first battery module can be electrically connected with the second battery module, and the heat insulation plate is arranged in the second box and between the first chamber and the second chamber. The thermal management method comprises: detecting a temperature of the second battery module to obtain a first detection temperature; controlling a state of the heat insulation plate to make the first chamber and the second chamber communicate with each other or be blocked according to the first detection temperature.

26. The thermal management method of claim 25, wherein, The thermal management method comprises: in a case that the first detection temperature is less than a first predetermined temperature, controlling the heat insulation plate to make the first chamber and the second chamber communicate with each other to exchange heat between the first chamber and the second chamber; or In a case that the first detection temperature is greater than or equal to the first predetermined temperature, the heat insulation plate is controlled to block the first chamber and the second chamber, so that heat exchange between the first chamber and the second chamber is stopped.

27. The thermal management method of claim 25, wherein, The heat management method comprises: In a case that the first detection temperature is less than the first predetermined temperature, a heating member arranged on the second battery module is controlled to heat the second battery module.

28. The thermal management method of claim 27, wherein, The heat management method comprises: A temperature of a heat sink on the inverter is detected to obtain a second detection temperature. In a case that the second detection temperature is greater than a second predetermined temperature, a vent opening of the second box body is controlled to be opened to connect an external environment of the second box body and the first chamber, so that the external environment of the second box body and the first chamber are exchanged, and the second predetermined temperature is greater than the first predetermined temperature.

29. The thermal management method of claim 25, wherein, The heat management method comprises: In a case that the first detection temperature is less than the first predetermined temperature, the heat insulation plate is controlled to connect the first chamber and the second chamber, so that heat exchange between the first chamber and the second chamber is performed, and a ventilation passage of a first connector and a second connector between the second battery module and the first energy storage device adjacent to the second battery module is controlled to be connected, so that the second chamber and the first box body adjacent to the second chamber are exchanged.

30. The thermal management method of claim 29, wherein, The heat management method further comprises: In a case that the first detection temperature is less than the first predetermined temperature, the heat insulation plate is controlled to connect the first chamber and the second chamber, so that heat exchange between the first chamber and the second chamber is performed, and the ventilation passage of the first connector and the second connector between the second battery module and the first energy storage device adjacent to the second battery module is controlled to be connected, so that the second chamber and the first box body adjacent to the second chamber are exchanged, and the ventilation passage of the first connector and the second connector between two adjacent first energy storage devices is controlled to be connected, so that two adjacent first box bodies in the at least two first box bodies are exchanged.

31. The thermal management method of claim 29, wherein, The heat management method further comprises: In a case that the first detection temperature is less than the first predetermined temperature, a heating member arranged on the first battery module is controlled to heat the first battery module.

32. The thermal management method of claim 29, wherein, The heat management method further comprises: In a case that the first detection temperature is greater than a third predetermined temperature, the first chamber and the second chamber are controlled to be blocked, and the ventilation passage of the first connector of the first energy storage device and the second connector of the second energy storage device is controlled to be connected to exchange the second chamber and the first box body adjacent to the second chamber, and in a case that the number of the first box bodies is at least two, two adjacent first box bodies in the at least two first box bodies are controlled to be exchanged, and the third predetermined temperature is greater than the first predetermined temperature.

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