Energy storage container and fuse adapter method

Abstract

The application relates to an energy storage container and a fuse adapting method. The energy storage container comprises: a busbar unit; a plurality of high-voltage boxes connected to the busbar unit; a plurality of battery clusters, one of which is electrically connected to one of the high-voltage boxes; and a processing unit electrically connected to the plurality of high-voltage boxes. The high-voltage box comprises a first short-circuit protection unit and a first current detection unit electrically connected to the first short-circuit protection unit. The first short-circuit protection unit is electrically connected to the processing unit. The first current detection unit is used for detecting a short-circuit resistance current of a branch where the high-voltage box is located when a short circuit exists in the container. The processing unit is used for selecting a fuse in the first short-circuit protection unit that is suitable for the energy storage container according to the short-circuit resistance current. The application can improve the reliability and rationality of short-circuit protection, reduce the safety risk caused by the short-circuit protection not being in place, improve the electrical safety, and reduce the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a storage container and a fuse adaptation method. BACKGROUND

[0002] With the perfection of the energy storage system, the power storage system industry of the lithium battery chemical system develops rapidly. Since the lithium battery stores a large amount of energy, if the device selection is not globally considered in the short-circuit current range, the system may explode and catch fire during a short-circuit process, causing direct economic losses.

[0003] However, since the system scheme design process fails to calculate and check the short-circuit current in advance, the trial and error cost is high and the project progress cannot meet the product development cycle. Moreover, the short-circuit current of the fuse is either too small, which causes the short-circuit current to be greater than the short-circuit current of the fuse in the case of extreme short-circuit of the system, thereby causing the fuse to explode and the energy storage system to catch fire, which poses a safety risk; or the short-circuit current of the fuse is too large, which makes the product bulky and requires more space for design. Once the space is small, the electrical clearance and creepage distance may be insufficient, which also poses a safety risk. SUMMARY

[0004] Therefore, the present application provides a storage container and a fuse adaptation method, which can check the selection of the fuse in advance from the overall perspective of the storage container, improve the reliability and rationality of short-circuit protection, reduce the safety risks caused by inadequate short-circuit protection, and improve the accuracy of fuse adaptation, so that the related components of short-circuit protection are smaller, which improves electrical safety while reducing costs.

[0005] According to an aspect of the present application, a storage container is provided, comprising: a busbar unit; a plurality of high-voltage boxes, the plurality of high-voltage boxes being connected to the busbar unit; a plurality of battery clusters, one battery cluster being electrically connected to one high-voltage box; a processing unit being electrically connected to the plurality of high-voltage boxes; wherein the high-voltage box comprises a first short-circuit protection unit and a first current detection unit electrically connected to the first short-circuit protection unit, the first short-circuit protection unit being electrically connected to the processing unit, the first current detection unit being used to detect the short-circuit current of the branch in which the high-voltage box is located when a short circuit exists in the container, and the processing unit being used to select a fuse in the first short-circuit protection unit that is adapted to the storage container according to the short-circuit current.

[0006] According to another aspect of the present application, a fuse adapter method is provided, which is applied to the energy storage container, and the fuse adapter method comprises: obtaining a short-circuit tolerance current of the battery cell; calculating a maximum short-circuit tolerance current that the energy storage container can withstand according to the short-circuit tolerance current and a short-circuit position in the energy storage container; and selecting a fuse in a first short-circuit protection unit of the high-voltage box that is adapted to the energy storage container based on the maximum short-circuit tolerance current that the energy storage container can withstand.

[0007] By detecting the short-circuit tolerance current of the branch where the high-voltage box is located when the container has a short circuit by using the processing unit, and selecting the fuse in the first short-circuit protection unit that is adapted to the energy storage container according to the short-circuit tolerance current, the aspects of the present application can check the selection of the fuse in advance from the overall perspective of the energy storage container, improve the reliability and rationality of short-circuit protection, reduce the safety risks caused by insufficient short-circuit protection, and improve the accuracy of fuse adaptation, so that the related components of short-circuit protection are smaller in size, which improves the electrical safety while reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0008] The technical solutions and other beneficial effects of the present application will become apparent from the following detailed description of the specific embodiments of the present application, combined with the accompanying drawings.

[0009] Figure 1 A block diagram of a first energy storage container according to an embodiment of the present application is shown.

[0010] Figure 2 A block diagram of a second energy storage container according to an embodiment of the present application is shown.

[0011] Figure 3 A schematic diagram of a centralized energy storage container according to an embodiment of the present application is shown.

[0012] Figure 4 A schematic diagram of a distributed energy storage container according to an embodiment of the present application is shown.

[0013] Figure 5 A schematic diagram of a single busbar cabinet short circuit according to an embodiment of the present application is shown.

[0014] Figure 6 A schematic diagram of a short circuit in one of the busbar cabinets according to an embodiment of the present application is shown.

[0015] Figure 7 A schematic diagram of a short circuit in one of the battery clusters of the busbar cabinets according to an embodiment of the present application is shown.

[0016] Figure 8 A flowchart of a fuse adapter method according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0018] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0019] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] 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. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials. In some instances, methods, means, elements, and circuits well known to those skilled in the art are not described in detail in order to highlight the main points of this application.

[0021] Figure 1 A block diagram illustrating a first type of energy storage container according to an embodiment of this application is shown. Figure 1 As shown, the energy storage container of this application includes a combiner unit 100, a processing unit 200, multiple high-voltage boxes 300, and multiple battery clusters 400. One battery cluster 400 is electrically connected to one high-voltage box 300, and the multiple high-voltage boxes 300 are connected to the combiner unit 100. The processing unit 200 is electrically connected to the multiple high-voltage boxes 300. Each high-voltage box 300 includes a first short-circuit protection unit 301 and a first current detection unit 302 electrically connected to the first short-circuit protection unit 301. The first short-circuit protection unit 301 is electrically connected to the processing unit 200. The first current detection unit 302 is used to detect the short-circuit withstand current of the branch containing the high-voltage box 300 when a short circuit occurs in the container. The processing unit 200 is used to select a fuse in the first short-circuit protection unit 301 that is compatible with the energy storage container based on the short-circuit withstand current.

[0022] In one embodiment, the combiner unit 100 is electrically connected to a power conversion system (PCS), which can convert DC power from each battery cluster 400 to AC power to discharge to an external load; or convert AC power from external mains power to DC power to charge each battery cluster 400. The power conversion system can communicate with the battery management system (BMS) via a controller area network (CAN) bus. This application does not limit the configuration of the power conversion system.

[0023] The bus unit 100 can be provided with a single bus cabinet or multiple bus cabinets. The bus cabinet can be provided with a bus bar. When the bus unit 100 is provided with multiple bus cabinets, the multiple bus cabinets can be connected in parallel and electrically connected to the energy storage converter.

[0024] The battery cluster 400 includes multiple battery packs, and each battery pack includes multiple battery cells. The multiple battery cells in each battery pack are arranged in rows and columns, and the multiple battery packs are connected in series to form the battery cluster 400. The high-voltage box 300 and the battery cluster 400 are each provided with n, where n is a positive integer. It can be understood that the number of battery clusters 400 and the number of battery cells can be set as needed, and the present application is not limited in this regard.

[0025] The first short-circuit protection unit of the high-voltage box 300 includes at least two different types of fuses. Because the types of fuses are different, the maximum short-circuit current that the fuses can withstand is also different. Different types of fuses can be electrically connected to the processing unit 200, so that the processing unit 200 can automatically select a fuse suitable for the energy storage container according to the situation.

[0026] The first current detection unit 302 includes a current sensor, which can be a Hall current sensor. Of course, the current sensor can also be of other types, and the present application is not limited in this regard.

[0027] Figure 2 A block diagram of a second energy storage container according to an embodiment of the present application is shown. As shown in the figure, Figure 2 The first short-circuit protection unit of the high-voltage box 300 also includes a first protection switch, and the first end of the first protection switch is electrically connected to at least two different types of fuses, and the second end of the first protection switch is electrically connected to the bus unit 100. The first protection switch can be used to connect the target type of fuse.

[0028] The high-voltage box 300 can also include a second short-circuit protection unit 303, which is electrically connected to the corresponding battery cluster 400 of the high-voltage box 300 and the bus unit 100. The multiple second short-circuit protection units 303 of the multiple high-voltage boxes 300 are connected to the bus unit 100. The second short-circuit protection unit 303 is connected in parallel to the first short-circuit protection unit 301.

[0029] In one embodiment, the second short-circuit protection unit of the high-voltage box 300 also includes at least two different types of fuses. Because the types of fuses differ, the maximum short-circuit withstand current they can withstand also differs. Different types of fuses can be electrically connected to the processing unit 200 so that the processing unit 200 can automatically select the appropriate fuse for the energy storage container as needed.

[0030] The second short-circuit protection unit of the high-voltage box 300 further includes a second protection switch. The first terminal of the second protection switch is electrically connected to at least two fuses of different types in the second short-circuit protection unit, and the second terminal of the second protection switch is electrically connected to the bus unit 100. The second protection switch can be used to connect fuses of the target type.

[0031] Figure 3 A schematic diagram of a centralized energy storage container according to an embodiment of this application is shown. Figure 3 As shown, the combiner unit 100 includes a combiner cabinet, which includes a first disconnect switch K11 and a second disconnect switch K12. The first terminal of the first disconnect switch K11 is electrically connected to the energy storage converter, and the second terminal of the first disconnect switch K11 is electrically connected to the first short-circuit protection units of the multiple high-voltage boxes 300. The first terminal of the second disconnect switch K12 is electrically connected to the energy storage converter, and the second terminal of the second disconnect switch K12 is electrically connected to the second short-circuit protection units of the multiple high-voltage boxes 300. Specifically, the second terminal of the first disconnect switch K11 is electrically connected to the first protection switch K21 of the multiple high-voltage boxes 300, and the second terminal of the second disconnect switch K12 is electrically connected to the second protection switch K22 of the multiple high-voltage boxes 300. The fuse for the first short-circuit protection unit is FUSE1, and the fuse for the second short-circuit protection unit is FUSE2.

[0032] Figure 4 A schematic diagram of a distributed energy storage container according to an embodiment of this application is shown. Figure 4 As shown, the energy storage converter PCS has multiple branches, each branch connected to a high-voltage box 300. That is, the first short-circuit protection unit and the second short-circuit protection unit of the high-voltage box 300 are both connected to one branch of the energy storage converter.

[0033] In one embodiment, a plurality of first short-circuit protection units 301 are electrically connected to the first disconnecting switch, and a plurality of second short-circuit protection units 303 are electrically connected to the second disconnecting switch. When at least one battery cluster 400 experiences a short circuit, the processing unit 200 calculates the sum of the short-circuit withstand currents of nx battery clusters 400 and selects a fuse in the first short-circuit protection unit 301 that is compatible with the energy storage container based on the sum of the short-circuit withstand currents of nx battery clusters 400, where x is the number of battery clusters 400 that experienced a short circuit.

[0034] Figure 5 A schematic diagram illustrating a short circuit in a single combiner cabinet according to an embodiment of this application is shown. Figure 5 As shown, the short circuit location is on one side of battery cluster 400, indicated by an asterisk. Assuming the combiner unit 100 connects to 6 battery clusters 400, when a combiner cabinet is installed inside the energy storage container, if the rightmost battery cluster 400 short-circuits, according to Kirchhoff's laws, the short-circuit withstand current flows through the busbar in the combiner cabinet to the short-circuit point of the branch containing the faulty battery cluster 400. At this time, the maximum short-circuit withstand current borne by the busbar in the combiner cabinet is the sum of the short-circuit withstand currents of all other branches containing the fault-free battery clusters 400, i.e., the sum of the short-circuit withstand currents of the 5 clusters. Taking the example that each branch containing a battery cluster 400 can withstand a short-circuit withstand current of 21kA, the maximum short-circuit withstand current borne by the busbar in the combiner cabinet is 21kA * 5 = 105kA.

[0035] In one embodiment, the combiner unit 100 includes at least two combiner cabinets, which are arranged in parallel, and a plurality of high-voltage boxes 300 are electrically connected to one of the at least two combiner cabinets.

[0036] When a short circuit occurs in one of the at least two combiner cabinets, the processing unit 200 calculates the sum of the short-circuit withstand currents of the n battery clusters 400 and selects the fuse in the first short-circuit protection unit 301 that is compatible with the energy storage container based on the sum of the short-circuit withstand currents of the n battery clusters 400.

[0037] Figure 6 This diagram illustrates a short circuit in one of a plurality of combiner cabinets according to an embodiment of this application. Figure 6 As shown, the bus unit 100 includes busbar 101 and busbar 102. Busbar 102 experiences a short circuit. Since the two busbars are connected in parallel, according to Kirchhoff's laws, the short-circuit withstand current flows through the main circuit of busbar 101 to the short-circuit point of busbar 102. At this time, the maximum short-circuit withstand current that the busbar can withstand is the sum of the short-circuit withstand currents of the six busbars, i.e., 21kA*6=126kA.

[0038] When at least one battery cluster 400 is short-circuited, the processing unit 200 is configured to calculate the sum of short-circuit resistance currents of 2n-x battery clusters 400, and select the fuse in the first short-circuit protection unit 301 that is suitable for the energy storage container according to the sum of short-circuit resistance currents of 2n-x battery clusters 400, where x is the number of short-circuited battery clusters 400.

[0039] Figure 7 A schematic diagram of a short circuit in one of the battery clusters of a plurality of busbars of an embodiment of the present application is shown. As shown in Figure 7 The busbar unit 100 includes busbars 101 and 102, and the rightmost battery cluster 400 is short-circuited. Since the two busbars are connected in parallel, according to Kirchhoff's law, the short-circuit resistance current of the other busbar 102 flows through the busbar 101 to the short-circuit point, and the maximum short-circuit resistance current that the high-voltage box 300 can withstand is the sum of the short-circuit resistance currents of 6 clusters plus the sum of the short-circuit resistance currents of 5 clusters, i.e. the sum of the short-circuit resistance currents of 11 clusters, which is 21kA*11=231kA.

[0040] In an embodiment, the battery cluster 400 includes a plurality of battery cells, and the processing unit 200 is further configured to obtain a correction coefficient of the short-circuit resistance current of the battery cell before selecting the fuse in the first short-circuit protection unit 301 that is suitable for the energy storage container according to the short-circuit resistance current.

[0041] For example, the battery cells in the battery cluster 400 of the present application are of the LF628K type. Taking this type of battery cell as an example, for a single battery cell, the short-circuit resistance current of the single battery cell can be represented as: I1=U1 / R1=3.2V / 0.1mΩ=32kA. Where I1 is the short-circuit resistance current of the single battery cell, U1 is the rated voltage of the single battery cell, and R1 is the internal resistance value of the single battery cell. The resistance value of the single battery cell does not need to be corrected.

[0042] For a battery pack composed of this type of battery cell, the short-circuit resistance current of the battery pack can be represented as: Ip=Up / Rp=(3.2*52)V / (0.1*52)mΩ=32kA. Where Ip is the short-circuit resistance current of the single battery pack, Up is the rated voltage of the single battery pack, and Rp is the internal resistance value of the single battery pack. Since the measured data is less than 21kA, the correction coefficient Kp=32kA / 21kA is approximately equal to 1.53.

[0043] For the battery cluster 400 composed of multiple battery packs, the short-circuit tolerance current of the battery cluster 400 can be expressed as: Ic = Uc / Rc = (3.2*416) V / (0.1*416) mΩ = 32 kA. Wherein, Ic is the short-circuit tolerance current of a single cluster, Uc is the rated voltage of a single cluster, and Rc is the internal resistance value of a single cluster. The cluster-level resistance correction coefficient is the same as that of the battery pack, and is approximately equal to 1.53. Therefore, the short-circuit tolerance current can be corrected to Ic = 32 kA / 1.53 = 21 kA.

[0044] The application also provides an energy storage system, which comprises the energy storage container.

[0045] Figure 8 A flowchart of a fuse adaptation method of an embodiment of the application is shown. As shown in the figure, the fuse adaptation method is applied to the energy storage container, and the fuse adaptation method comprises the following steps: Figure 8

[0046] Step S1: obtaining the short-circuit tolerance current of the battery cell;

[0047] In an embodiment, the short-circuit tolerance current of the battery cell is determined according to the correction coefficient and the nominal tolerance current of the battery cell. For example, the correction coefficient can be 1.53, and the nominal tolerance current can be 32 kA. Multiplying the correction coefficient and the nominal tolerance current of the battery cell can obtain the short-circuit tolerance current of the battery cell as 21 kA.

[0048] Step S2: calculating the maximum short-circuit tolerance current that the energy storage container can withstand according to the short-circuit tolerance current and the short-circuit position in the energy storage container;

[0049] In an embodiment, a second current detection unit is arranged in each busbar cabinet in the busbar unit, for detecting whether the busbar cabinet is short-circuited. The processing unit determines the position of the busbar cabinet or battery cluster that is short-circuited according to the current information detected by the first current detection unit and the current signal detected by the second current detection unit, and then calculates the maximum short-circuit tolerance current that the energy storage container can withstand.

[0050] Wherein, when at least one battery cluster 400 is short-circuited, the processing unit 200 is configured to calculate the sum of the short-circuit tolerance currents of n-x battery clusters 400, and select the fuse in the first short-circuit protection unit 301 that is adapted to the energy storage container according to the sum of the short-circuit tolerance currents of n-x battery clusters 400, x being the number of battery clusters 400 that are short-circuited.

[0051] ​For the architecture of multiple busbars, when a short circuit occurs in at least one busbar of the multiple busbars, the processing unit 200 is configured to calculate the sum of the short-circuit withstand currents of the n battery clusters 400, and select the fuse in the first short-circuit protection unit 301 that is suitable for the energy storage container according to the sum of the short-circuit withstand currents of the n battery clusters 400.

[0052] For the architecture of multiple busbars, when a short circuit occurs in at least one battery cluster 400, the processing unit 200 is configured to calculate the sum of the short-circuit withstand currents of the 2n-x battery clusters 400, and select the fuse in the first short-circuit protection unit 301 that is suitable for the energy storage container according to the sum of the short-circuit withstand currents of the 2n-x battery clusters 400, where x is the number of battery clusters 400 in which a short circuit occurs.

[0053] Step S3: Selecting the fuse in the first short-circuit protection unit of the high-voltage box that is suitable for the energy storage container based on the maximum short-circuit withstand current that the energy storage container can withstand.

[0054] In an embodiment, a plurality of different types of fuses are provided in the first short-circuit protection unit. For example, when the maximum short-circuit withstand current that the energy storage container can withstand is calculated to be 126 kA, the fuse with a maximum short-circuit withstand current of 126 kA can be selected to be turned on in the first short-circuit protection unit through the first protection switch.

[0055] It should be noted that a plurality of different types of fuses can also be provided in the second short-circuit protection unit. The processing unit can also select the fuse in the second short-circuit protection unit of the high-voltage box that is suitable for the energy storage container based on the maximum short-circuit withstand current that the energy storage container can withstand, and the working principle is the same as that of the first short-circuit protection unit, which will not be described again.

[0056] In summary, by using the processing unit to detect the short-circuit withstand current of the branch in which the high-voltage box is located when a short circuit exists in the container, and selecting the fuse in the first short-circuit protection unit that is suitable for the energy storage container according to the short-circuit withstand current, the application can check the selection of the fuse from the overall perspective of the energy storage container in advance, improve the reliability and rationality of short-circuit protection, reduce the safety risks caused by inadequate short-circuit protection, and at the same time improve the accuracy of the selection of the fuse, so that the related components of the short-circuit protection are smaller in size, which improves the electrical safety while reducing the cost.

[0057] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0058] The energy storage container and the fuse adapter method provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the technical solutions of the present application and the core ideas thereof. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently, and the modification or replacement does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage container, characterized by, include: Busbar unit; Multiple high-voltage boxes are connected to the combiner unit; Multiple battery clusters, one of which is electrically connected to a high-voltage box, and both the high-voltage box and the battery clusters are provided in n units, where n is a positive integer; The processing unit is electrically connected to multiple of the high-voltage boxes; The high-voltage box includes a first short-circuit protection unit and a first current detection unit electrically connected to the first short-circuit protection unit. The first short-circuit protection unit is electrically connected to the processing unit. The first short-circuit protection unit of the high-voltage box includes at least two different types of fuses. The different types of fuses can withstand different maximum short-circuit withstand currents. The first current detection unit is used to detect the short-circuit withstand current of the branch where the high-voltage box is located when there is a short circuit in the container. The processing unit is used to select the target type of fuse in the first short-circuit protection unit that is adapted to the energy storage container according to the short-circuit withstand current. The current combining unit includes a current combining cabinet, which includes a first disconnect switch. Multiple first short-circuit protection units are electrically connected to the first disconnect switch. When at least one battery cluster experiences a short circuit, the processing unit calculates the sum of the short-circuit withstand currents of nx battery clusters and selects a fuse in the first short-circuit protection unit that is compatible with the energy storage container based on the sum of the short-circuit withstand currents of nx battery clusters, where x is the number of battery clusters that experienced a short circuit.

2. The energy storage container of claim 1, wherein, The high-voltage box also includes a second short-circuit protection unit, which is electrically connected to the battery cluster corresponding to the high-voltage box and the current collector, and is connected in parallel to the first short-circuit protection unit.

3. The energy storage container of claim 2, wherein, The combiner cabinet includes a second disconnect switch, and multiple second short-circuit protection units are electrically connected to the second disconnect switch. The first end of the second disconnect switch is electrically connected to the energy storage converter, and the second end of the second disconnect switch is electrically connected to the second short-circuit protection units of the multiple high-voltage boxes.

4. The energy storage container of claim 2, wherein, The combiner unit includes at least two combiner cabinets, which are connected in parallel. Multiple high-voltage boxes are electrically connected to one of the at least two combiner cabinets. Each combiner cabinet is equipped with a second current detection unit for detecting whether the combiner cabinet is short-circuited.

5. The energy storage container of claim 4, wherein, When a short circuit occurs in one of the at least two combiner cabinets, the processing unit calculates the sum of the short-circuit withstand currents of the n battery clusters and selects the fuse in the first short-circuit protection unit that is compatible with the energy storage container based on the sum of the short-circuit withstand currents of the n battery clusters.

6. The energy storage container of claim 4, wherein, When at least one battery cluster experiences a short circuit, the processing unit calculates the sum of the short-circuit withstand currents of 2n-x battery clusters, and selects the fuse in the first short-circuit protection unit that is compatible with the energy storage container based on the sum of the short-circuit withstand currents of 2n-x battery clusters, where x is the number of battery clusters that experienced a short circuit.

7. The energy storage container of any of claims 1-6, wherein, The battery cluster comprises a plurality of battery cells, and before the processing unit selects the first short-circuit protection unit according to the short-circuit resistant current, the processing unit is further configured to: obtain a correction coefficient of the short-circuit resistant current of the battery cell; and determine the short-circuit resistant current according to the correction coefficient and a nominal resistant current of the battery cell.

8. A fuse adaptation method, characterized by, The fuse adaptation method is applied to the energy storage container according to any one of claims 1-7, and the fuse adaptation method comprises: obtaining a short-circuit resistant current of a battery cell; calculating a maximum short-circuit resistant current that the energy storage container can withstand according to the short-circuit resistant current and a short-circuit position in the energy storage container; selecting a first short-circuit protection unit of a high-voltage box to adapt the fuse of the energy storage container based on the maximum short-circuit resistant current that the energy storage container can withstand.

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