energy storage system

Abstract

The utility model discloses a kind of energy storage systems. Energy storage system includes box, several battery modules and PCS module;Several battery modules are configured to be located in box;PCS module is configured to be located in box, and PCS module includes several group string type converters, and several group string type converters are respectively connected one-to-one with several battery modules;Several group string type converters are stacked along the height direction of box. Thus, any battery module independently stores electric energy;The setting that several group string type converters are respectively connected one-to-one with several battery modules can make the energy storage system more stable, and when any battery module and / or group string type converter is abnormal, staff can also quickly locate abnormal battery module and / or group string type converter;Group string type converter is stacked along the height direction of box, to utilize the space on the height in box as far as possible, reduce the waste of space in box.

Description

Technical Field

[0001] This utility model relates to the field of novel energy storage, and more specifically to energy storage systems. Background Technology

[0002] With the rapid development of distributed energy and microgrids, energy storage systems are also rapidly evolving. Existing energy storage systems typically consist of a enclosure, battery clusters, and a power supply system (PCS). The battery clusters and PCS are located within the enclosure. One PCS manages one battery cluster. However, the multiple converters of the PCS are arranged sequentially along a horizontal direction. In this invention, this arrangement results in a large horizontal space occupied by the multiple converters of the PCS, leading to low space utilization within the enclosure.

[0003] Therefore, this invention provides an energy storage system to at least partially solve the above-mentioned problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further described in detail in the detailed embodiments section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above-mentioned technical problems, this utility model provides an energy storage system, which includes:

[0006] Box;

[0007] Several battery modules are configured to be housed inside the casing;

[0008] The PCS module is configured to be located inside the enclosure. The PCS module includes several string converters, and each string converter is connected to a corresponding battery module.

[0009] Several string converters are stacked along the height of the enclosure.

[0010] According to the energy storage system of this invention, each battery module is an independent energy storage subsystem for storing electrical energy. Secondly, several string converters are connected one-to-one with several battery modules. On the one hand, when any battery module malfunctions or experiences capacity loss, the energy storage system will stop using that battery module and disconnect it from the system, while the other battery modules can still operate normally. Therefore, this configuration makes the energy storage system more stable. On the other hand, when any battery module and / or string converter malfunctions, it will not affect the normal operation of the energy storage system. Furthermore, personnel can quickly locate the malfunctioning battery module and / or string converter, improving the efficiency of handling abnormal situations and effectively reducing subsequent maintenance costs. Compared to centralized converters in existing technologies, the use of string converters allows each battery module to operate independently from its corresponding string converter. This effectively reduces current circulation between battery modules, minimizes module mismatch, and consequently improves the cycle life, overall charge / discharge capacity, and yield of the energy storage system. The string converters are stacked along the height of the enclosure, maximizing the use of vertical space and minimizing wasted space. Furthermore, the battery modules and PCS modules are located within the enclosure, facilitating their transport and providing protection for both.

[0011] Optionally, the battery module includes:

[0012] A battery rack is installed in the housing, and battery cluster mounting positions are formed on the battery rack;

[0013] Battery clusters are located at the battery cluster mounting positions;

[0014] The number of battery cluster mounting positions is greater than or equal to the number of battery clusters.

[0015] Optionally, the energy storage system may also include:

[0016] The heat exchange module, located inside the housing, is used to regulate the temperature of the battery module.

[0017] Optionally, the heat exchange module includes:

[0018] The liquid cooling unit includes several input terminals and several output terminals;

[0019] Several heat exchange pipes, one end of each heat exchange pipe is connected to an input end of the liquid chiller unit, and the other end is connected to an output end of the liquid chiller unit, so as to form multiple sets of circulation loops;

[0020] The number of input and output ends of the liquid cooling unit shall not be less than the number of heat exchange pipes;

[0021] Each heat exchange pipe includes a heat exchange section connected to the side wall of the battery rack, which is used to exchange heat with the battery cluster.

[0022] Optionally, the energy storage system may also include:

[0023] The first transformer includes a first low-voltage side and a first high-voltage side arranged opposite to each other, the first high-voltage side being used for electrical connection to the power grid.

[0024] The bus includes a first input terminal and a first output terminal. The first input terminal is connected to the first low-voltage side of the first transformer, and the first output terminal includes several terminals.

[0025] At least some of the terminals are connected to a number of string converters one by one.

[0026] Optionally, the energy storage system may also include:

[0027] The second transformer includes a second low-voltage side and a second high-voltage side arranged opposite to each other. The second high-voltage side is connected to the first high-voltage side of the first transformer, and the second low-voltage side is used for electrical connection with external equipment.

[0028] Optionally, the energy storage system may also include:

[0029] The power distribution control cabinet is located inside the enclosure and is electrically connected to the PCS module, battery module, heat exchange module, first transformer, and second transformer.

[0030] Optionally, the energy storage system may also include:

[0031] The fire protection module is installed inside the enclosure and is electrically connected to the power distribution control cabinet. The fire protection module is used to detect the fire protection parameters of the energy storage system and perform fire protection operations. The power distribution control cabinet is used to control the opening or closing of the fire protection module.

[0032] Optionally, the fire protection module includes:

[0033] Fire detectors are used to detect fire parameters of energy storage systems.

[0034] The fire alarm control panel is electrically connected to the power distribution control cabinet and the fire detectors to collect fire parameters through the fire detectors;

[0035] The fire extinguisher is electrically connected to the fire control panel, which controls the fire extinguisher to perform fire-fighting operations based on fire parameters.

[0036] Optionally, the fire parameters include at least one of the concentrations of carbon monoxide, hydrogen, and smoke. Attached Figure Description

[0037] To make the advantages of this invention more readily apparent, the invention briefly described above will be described in more detail with reference to the specific embodiments shown in the accompanying drawings. It should be understood that these drawings depict only typical embodiments of the invention and should not be construed as limiting its scope of protection. The invention is described and explained with additional features and details through the drawings.

[0038] Figure 1 This is a cross-sectional schematic diagram of a top view of an energy storage system according to a preferred embodiment of the present invention.

[0039] Figure 2 for Figure 1 A sectional view of the main view of the energy storage system; and

[0040] Figure 3 for Figure 1 A schematic diagram of the series structure of an energy storage system.

[0041] Explanation of reference numerals in the attached figures

[0042] 110: Box body 111: Box door

[0043] 120: Battery Module; 121: Battery Cluster

[0044] 122: Battery rack 123: Side wall

[0045] 130: PCS module; 131: String converter

[0046] 140: Heat exchange module; 141: Liquid cooling unit

[0047] 142: Heat exchange pipe 143: Heat exchange section

[0048] 150: Busbar 151: System Output Terminal

[0049] 152: First transformer; 153: Electricity meter

[0050] 154: Switch 155: Output busbar

[0051] 156: First low-pressure side; 157: First high-pressure side

[0052] 158: Terminal block; 160: Second transformer

[0053] 161: External equipment; 162: Fire alarm control panel

[0054] 163: Second low-pressure side; 164: Second high-pressure side Detailed Implementation

[0055] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0056] The preferred embodiments of this utility model will now be described with reference to the accompanying drawings. It should be noted that the terms "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0057] In this document, ordinal numbers such as “first” and “second” used in this invention are merely identifiers and do not include any other meaning, such as a specific order.

[0058] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may also include other embodiments.

[0059] Please refer to Figures 1 to 3 The energy storage system includes a housing 110, several battery modules 120, and a PCS module 130. The battery modules 120 are configured to be housed within the housing 110. The PCS module 130 is configured to be housed within the housing 110. Each PCS module 130 includes several string converters 131. Each string converter 131 is connected to one of the battery modules 120 in a corresponding manner. The string converters 131 are stacked along the height of the housing 110.

[0060] As can be seen from the above structure, in this application, firstly, each battery module 120 is an independent energy storage subsystem for storing electrical energy. Secondly, the PCS module 130 in this application includes several string converters 131. Each string converter 131 corresponds one-to-one with a battery module 120. On the one hand, when any battery module 120 malfunctions or experiences capacity loss, the energy storage system will stop using that battery module 120 and disconnect it from the system, while the other battery modules 120 can still operate normally. Therefore, this arrangement makes the energy storage system more stable. On the other hand, when any battery module 120 and / or string converter 131 malfunctions, it will not affect the normal operation of the energy storage system. Furthermore, personnel can quickly locate the malfunctioning battery module 120 and / or string converter 131, improving the efficiency of handling abnormal situations and effectively reducing subsequent maintenance costs.

[0061] Furthermore, the use of string converters 131, compared to centralized converters in the prior art, allows each battery module 120 to operate independently from its corresponding string converter 131. This effectively reduces the phenomenon of current circulation between battery modules 120, reduces the consistency mismatch of battery modules 120, and thus helps to improve the cycle life of the energy storage system, as well as the charge and discharge capacity and yield of the energy storage system throughout its entire life cycle.

[0062] Furthermore, by stacking the string converters 131 along the height of the enclosure 110, this application maximizes the use of the vertical space within the enclosure 110, reducing wasted space. In other words, it effectively improves the space utilization rate of the enclosure 110.

[0063] It should also be noted that in this application, both the battery module 120 and the PCS module 130 are housed within the enclosure 110. On the one hand, the enclosure 110 provides effective protection for the modules, which helps extend their service life; on the other hand, it also facilitates the transportation of the battery module 120 and the PCS module 130.

[0064] Optionally, the container 110 can be a shipping container or a commercial / industrial counter, etc., without limitation. When the container 110 is constructed as an existing shipping container, it typically includes a base frame, side walls, end walls, and a top wall. The base frame, side walls, end walls, and top wall form a roughly rectangular parallelepiped structure. The dimensions of the container 110 can be approximately the same as those of an existing 20-foot shipping container. A doorway and a container door 111 are provided at one end of the container 110. The container door 111 is used to open or close the doorway.

[0065] In one embodiment of this application, the battery module 120 includes a battery rack 122 and battery clusters 121. The battery rack 122 is disposed within the housing 110. Battery cluster mounting positions (not shown) are formed on the battery rack 122, and battery clusters 121 are disposed in the battery cluster mounting positions of the battery rack 122. The number of battery cluster mounting positions is greater than or equal to the number of battery clusters 121.

[0066] Specifically, when the number of battery cluster mounting positions is greater than the number of battery clusters 121, when the user has a need to increase the capacity of the energy storage system, battery clusters 121 can be added directly to the reserved battery cluster mounting positions without additional design and production of the energy storage system. This can shorten the cycle required for the expansion of the energy storage system and improve the expansion efficiency of the energy storage system.

[0067] When the number of battery cluster mounting positions equals the number of battery clusters 121 (fully configured), the capacity of the energy storage system can reach the preset maximum value, thereby meeting the user's demand for high capacity at once and reducing space waste caused by the idle reserved battery cluster mounting positions. In addition, in the fully configured state, the internal structure of the energy storage system is also more compact, which can reduce problems such as vibration, abnormal noise or dust accumulation caused by the idle reserved battery cluster mounting positions, and reduce the risk of structural damage during long-term operation of the energy storage system.

[0068] Optionally, the enclosure 110 may contain 6, 8, 10, or more battery racks 122; no limitation is imposed here. When the number of battery racks 122 in the enclosure 110 is 8, the energy storage system can meet the power expansion requirements of 400-3300 kWh, thus enabling flexible combination according to user needs, strong scalability, and reducing the workload of subsequent capacity expansion, thereby meeting the capacity expansion needs of users at any time of electricity consumption.

[0069] In one embodiment of this application, the energy storage system further includes a heat exchange module 140. The heat exchange module 140 is disposed within the housing 110. The heat exchange module 140 is used to regulate the temperature of the battery module 120. The heat exchange module 140 maintains the operating temperature of the battery module 120 within a predetermined temperature range, thereby reducing the probability of a fire caused by overheating of the battery module 120, and reducing the probability of a decrease in the output power of the battery module 120 due to underheating.

[0070] In one embodiment of this application, the heat exchange module 140 includes a liquid cooler unit 141 and a plurality of heat exchange pipes 142. The liquid cooler unit 141 includes a plurality of input terminals (not shown in the figure) and a plurality of output terminals (not shown in the figure). One end of each heat exchange pipe 142 is connected to one input terminal of the liquid cooler unit 141, and the other end is connected to one output terminal of the liquid cooler unit 141, forming multiple sets of circulation loops. By forming multiple sets of circulation loops in this application, heat exchange medium can be transported within the circulation loops, thereby controlling the temperature of the energy storage system through the circulation of the heat exchange medium. This allows the energy storage system to operate within a suitable temperature range, thereby improving the operating efficiency of the energy storage system.

[0071] The number of input and output terminals of the liquid cooling unit 141 is not less than the number of heat exchange pipes 142. Specifically, when the number of input and output terminals of the liquid cooling unit 141 is greater than the number of heat exchange pipes 142, for example, the liquid cooling unit 141 includes 6 input terminals and 6 output terminals, and the number of heat exchange pipes 142 is 3, in this embodiment, the 3 heat exchange pipes 142 are respectively connected to 3 input terminals and 3 output terminals of the liquid cooling unit 141 to form 3 sets of circulation loops. When the energy storage system is expanded, that is, when the number of battery clusters 121 increases, if it is necessary to add circulation loops to improve the cooling effect on battery clusters 121, it is only necessary to directly connect the remaining input and output terminals to new heat exchange pipes 142 to realize the expansion of the heat exchange module 140, which can improve the flexibility of the heat exchange module 140 and shorten the expansion cycle of the heat exchange module 140. Therefore, by having more input and output terminals than the number of heat exchange pipes 142, a certain number of circulation loops can be added or reduced according to the size of the system capacity, thereby effectively improving the flexibility and adaptability of the heat exchange module 140.

[0072] Of course, in some other embodiments, the number of heat exchange pipes 142 can also be 5, 7, 8, 10, 12, etc., and there is no limitation here. The number of circulation loops is the same as the number of heat exchange pipes 142. That is, when there are 5 heat exchange pipes 142, there are 5 circulation loops, and when there are 8 heat exchange pipes 142, there are 8 circulation loops. This will not be elaborated further here.

[0073] When the number of input terminals and the number of output terminals of the liquid cooling unit 141 are equal to the number of heat exchange pipes 142, this setting allows the input terminals and output terminals to correspond one-to-one with the heat exchange pipes 142, eliminating the need for additional redundant pipe interfaces or switching valves. This reduces cross-interference in pipe connections, making the configuration of the circulation loop simpler.

[0074] Each heat exchange pipe 142 includes a heat exchange section 143 connected to the side wall 123 of the battery rack 122. The heat exchange section 143 is used to exchange heat with the battery cluster 121. Compared to arbitrarily arranging the heat exchange pipes 142, this allows the heat exchange section 143 to be closer to the heat source of the battery cluster 121, thereby shortening the heat exchange path and improving the heat exchange effect on the battery cluster 121. Furthermore, since the battery rack 122 typically needs to accommodate the battery cluster 121, electrical components, and other structures, the internal space of the battery rack 122 is limited. Connecting the heat exchange section 143 to the side wall 123 of the battery rack 122 also makes good use of the space of the battery rack 122, making the overall structure more compact.

[0075] In one embodiment of this application, the energy storage system further includes a first transformer 152 and a busbar 150. The first transformer 152 includes a first low-voltage side 156 and a first high-voltage side 157 disposed opposite to each other. The first high-voltage side 157 is used for electrical connection to the power grid (not shown in the figure). In this application, the first transformer 152, through the voltage change of the first low-voltage side 156 and the first high-voltage side 157, can convert the low voltage output of the string converter 131 into a high voltage that conforms to the grid connection standard, thereby solving the problem of low voltage compatibility between the energy storage system and the high voltage level of the power grid, and ensuring that the energy storage system can be safely and compliantly connected to the power grid.

[0076] Bus 150 includes a first input terminal (not shown) and a first output terminal (not shown). The first input terminal is connected to the first low-voltage side 156 of the first transformer 152. The first output terminal includes a plurality of terminals 158. At least some of the terminals 158 are respectively connected to a plurality of string converters 131 in a one-to-one correspondence. First, in this application, bus 150 receives the voltage output from the low-voltage side of the first transformer 152 through the first input terminal, and then distributes the voltage to the corresponding string converters 131 through the plurality of terminals 158 of the first output terminal, thereby realizing the voltage distribution function of "single input, multiple output", and thus solving the connection matching problem between the low-voltage side of the first transformer 152 and the multiple string converters 131. Second, the one-to-one correspondence between at least some of the terminals 158 and the string converters 131 not only reduces the use of lines to reduce consumable costs, but also reduces line losses, thereby improving the overall stability of the system.

[0077] Furthermore, since the corresponding grid voltage levels vary depending on the user's location, this energy storage system uses a first transformer 152 to convert the low voltage output from the string converter 131 to a voltage level conforming to the local grid standard before connecting to the grid. The first input terminal of the busbar 150 provides a unified low-voltage side connection interface for first transformers 152 with different conversion ratios. Therefore, users can achieve low-voltage to the corresponding standard voltage conversion simply by connecting the first transformer 152 adapted to the local grid standard to the first input terminal of the busbar 150, according to their own needs. In this application, the above configuration allows the energy storage system to meet the access requirements of different regions without requiring overall modification due to regional grid standard differences; only the first transformer 152 needs to be replaced, effectively improving the regional adaptability of the energy storage system.

[0078] The number of terminals 158 may be greater than or equal to the number of string converters 131, and there is no restriction here.

[0079] In some embodiments, when the number of terminals 158 exceeds the number of string converters 131, some terminals 158 are connected one-to-one with each string converter 131. When the energy storage system adds a battery cluster 121 to expand its capacity, the number of string converters 131 increases accordingly. In this case, the remaining terminals 158 can be directly connected to the new string converter 131 without modifying or replacing the busbar 150. This arrangement reduces system downtime or secondary modification costs due to capacity expansion, shortens the expansion cycle, and improves the adaptability of the energy storage system. Of course, if a terminal 158 fails, the string converter 131 can be quickly switched to a backup terminal 158, thereby reducing the occurrence of string converters 131 failing due to the failure of a single terminal 158 and improving the reliability of the energy storage system.

[0080] Of course, in some other embodiments, the number of terminals 158 can also be equal to the number of string converters 131. With this arrangement, the terminals 158 and string converters 131 can be connected one-to-one, eliminating the need for additional terminals 158. This makes the circuit layout of the bus 150 simpler and reduces space waste and line redundancy caused by idle spare terminals. At the same time, the one-to-one connection also reduces line branches, thereby reducing resistance loss caused by multiple terminals 158 and improving power transmission efficiency.

[0081] In one embodiment of this application, the energy storage system further includes a second transformer 160. The second transformer 160 includes a second low-voltage side 163 and a second high-voltage side 164 disposed opposite to each other. The second high-voltage side 164 is connected to the first high-voltage side 157 of the first transformer 152. The second low-voltage side 163 is used for electrical connection with an external device 161. Firstly, in this application, through the arrangement of the second transformer 160, the second low-voltage side 163 of the second transformer 160 can convert the high voltage of the first high-voltage side 157 of the first transformer 152 into the low voltage required by the external device 161, thereby meeting the power consumption needs of the external device 161.

[0082] Secondly, by connecting the second low-voltage side 163 of the second transformer 160 to the external device 161, users can easily select the second transformer 160 with the corresponding conversion ratio according to the voltage standard of the external device 161 in the region where the energy storage system is located. This allows the high voltage output from the first transformer 152 to be converted into the low voltage required by the external device 161, thereby improving the adaptability of the energy storage system.

[0083] In one embodiment of this application, the energy storage system further includes a power distribution control cabinet (not shown in the figure). The power distribution control cabinet is housed within a enclosure 110 and is electrically connected to the PCS module 130, battery module 120, heat exchange module 140, first transformer 152, and second transformer 160. The operation of the PCS module 130, battery module 120, heat exchange module 140, first transformer 152, and second transformer 160 is controlled through the power distribution control cabinet. This enables automated control of the above-described structure, thereby improving the intelligent configuration of the energy storage system.

[0084] In one embodiment of this application, the energy storage system further includes a fire suppression module (not shown in the figure). The fire suppression module is housed within the enclosure 110. The fire suppression module is electrically connected to the power distribution control cabinet. The fire suppression module is used to detect the fire suppression parameters of the energy storage system and perform fire suppression operations. The power distribution control cabinet is used to control the opening and closing of the fire suppression module. First, when needed (e.g., during the process of the energy storage system supplying power to the grid and / or external equipment), the power distribution control cabinet controls the fire suppression module to open and begin operation. During the operation of the fire suppression module, fire suppression parameters are collected in real time. When the fire suppression parameters of the energy storage system become abnormal, the fire suppression module performs fire suppression operations. When the fire suppression parameters of the energy storage system return to normal, the fire suppression module automatically closes the fire suppression mode and stops performing fire suppression operations. Therefore, by controlling the fire suppression module through the power distribution control cabinet, automated control of the fire suppression module can be achieved, thereby improving the intelligence of the energy storage system. Secondly, the fire suppression module enables real-time monitoring of the fire suppression parameters of the energy storage system, thereby improving the safety of the energy storage system. When the energy storage system stops supplying power to the grid and / or external equipment, the power distribution control cabinet can control the fire suppression module to close and stop operation.

[0085] Among them, the fire protection parameters mainly refer to environmental parameters, specifically including at least one of carbon monoxide concentration, hydrogen concentration and smoke concentration.

[0086] In one embodiment of this application, the fire protection module includes a fire detector (not shown in the figure), a fire control panel 162, and a fire extinguisher (not shown in the figure). The fire detector is used to detect the fire protection parameters of the energy storage system; the fire control panel 162 is electrically connected to the power distribution control cabinet and the fire detector to collect fire protection data through the fire detector, and the fire extinguisher is electrically connected to the fire control panel 162. The fire control panel 162 controls the fire extinguisher to perform fire suppression operations based on the fire protection parameters. Specifically, the fire detector continuously detects the fire protection parameters of the energy storage system. These fire protection parameters are as described above and will not be repeated here. The fire control panel 162 is electrically connected to the power distribution control cabinet to exchange information, enabling the power distribution control cabinet to control the opening or closing of the fire protection module. The fire control panel 162 is also electrically connected to the fire detector and the fire extinguisher to collect fire protection parameters through the fire detector, and then controls the fire extinguisher to perform fire suppression operations based on the fire protection parameters, thereby spraying extinguishing media into the enclosure 110. In this application, through the continuous detection of the fire detector and the real-time analysis of the fire control panel 162, fires can be detected in a timely manner, and fire suppression actions can be taken. Therefore, the above-described structure can effectively improve the safety of the energy storage system. Furthermore, since the entire process ensures the safety of the energy storage system without human intervention, it improves the automation level and reliability of the system, while reducing its manual maintenance costs.

[0087] Optionally, such as Figure 3 As shown, the energy storage system also includes a meter 153, a switch 154, and an output busbar 155. The output busbar 155 is used for electrical connection to the power grid. The output busbar 155 is electrically connected to the system output terminal 151. The meter 153, switch 154, and output busbar 155 are all located within the enclosure 110. The meter 153 is installed on the circuit between the system output terminal 151 and the first transformer 152. Thus, the voltage on the high-voltage side of the first transformer 152 can be monitored in real time using the meter 153. Furthermore, the output busbar 155 facilitates electrical connection to the power grid. The switch 154 is located between the meter 153 and the output busbar 155 to control the on / off state of the circuit between the meter 153 and the output busbar 155.

[0088] It should be noted that in this article, electrical connection refers to a connection via a wire to transmit electrical energy or electrical signals.

[0089] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0090] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “component” as used herein may refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” as used herein may refer to one component being directly attached to another component or one component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

Claims

1. An energy storage system, characterized in that, The energy storage system includes: Box; Several battery modules are configured to be housed within the housing; The PCS module is configured to be located inside the enclosure. The PCS module includes several string converters, and each string converter is connected to a corresponding battery module. Several of the string converters are stacked along the height of the enclosure.

2. The energy storage system according to claim 1, characterized in that, The battery module includes: A battery rack is disposed in the housing, and battery cluster mounting positions are formed on the battery rack; A battery cluster is disposed at the battery cluster mounting position; The number of battery cluster mounting positions is greater than or equal to the number of battery clusters.

3. The energy storage system according to claim 2, characterized in that, The energy storage system also includes: A heat exchange module is installed inside the housing, and the heat exchange module is used to regulate the temperature of the battery module.

4. The energy storage system according to claim 3, characterized in that, The heat exchange module includes: The liquid cooling unit includes several input terminals and several output terminals; A plurality of heat exchange pipes, one end of each heat exchange pipe being connected to one of the input terminals of the liquid chiller unit and the other end being connected to one of the output terminals of the liquid chiller unit, to form multiple sets of circulation loops; The number of input terminals and the number of output terminals of the liquid cooling unit are not less than the number of heat exchange pipes; Each of the heat exchange pipes includes a heat exchange section connected to the side wall of the battery rack, the heat exchange section being used to exchange heat on the battery cluster.

5. The energy storage system according to claim 3, characterized in that, The energy storage system also includes: The first transformer includes a first low-voltage side and a first high-voltage side disposed opposite to each other, wherein the first high-voltage side is used for electrical connection to the power grid. The bus includes a first input terminal and a first output terminal. The first input terminal is connected to the first low-voltage side of the first transformer, and the first output terminal includes several terminals. At least some of the wiring terminals are respectively connected to a plurality of the string converters.

6. The energy storage system according to claim 5, characterized in that, The energy storage system also includes: The second transformer includes a second low-voltage side and a second high-voltage side arranged opposite to each other. The second high-voltage side is connected to the first high-voltage side of the first transformer, and the second low-voltage side is used for electrical connection with external equipment.

7. The energy storage system according to claim 6, characterized in that, The energy storage system also includes: A power distribution control cabinet is installed inside the enclosure, and the power distribution control cabinet is electrically connected to the PCS module, the battery module, the heat exchange module, the first transformer, and the second transformer.

8. The energy storage system according to claim 7, characterized in that, The energy storage system also includes: A fire protection module is installed inside the enclosure and is electrically connected to the power distribution control cabinet. The fire protection module is used to detect the fire protection parameters of the energy storage system and perform fire protection operations. The power distribution control cabinet is used to control the opening or closing of the fire protection module.

9. The energy storage system according to claim 8, characterized in that, The fire protection module includes: Fire detectors are used to detect the fire parameters of the energy storage system. The fire alarm control panel is electrically connected to the power distribution control cabinet and the fire detector to collect the fire parameters through the fire detector; The fire extinguisher is electrically connected to the fire control panel, and the fire control panel controls the fire extinguisher to perform the fire response operation according to the fire parameters.

10. The energy storage system according to claim 8, characterized in that, The fire protection parameters include at least one of the following: carbon monoxide concentration, hydrogen concentration, and smoke concentration.

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