Energy storage container and fuse adaptation method

Abstract

The invention relates to an energy storage container and a fuse adaptation method. The energy storage container comprises a confluence unit; the plurality of high-voltage boxes are connected to the confluence unit; a plurality of battery clusters, wherein one battery cluster is electrically connected with one high-voltage box; the processing unit is 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, and the first current detection unit is used for detecting short-circuit withstand current of a branch where the high-voltage box is located when the container is short-circuited. And the processing unit is used for selecting a fuse adaptive to the energy storage container in the first short-circuit protection unit according to the short-circuit withstand current. According to the invention, the reliability and rationality of short-circuit protection can be improved, the safety risk caused by improper short-circuit protection is reduced, and the cost is reduced while the electrical safety is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an energy storage container and a fuse adaptation method. Background Art

[0002] With the improvement of energy storage systems, the power energy storage system industry of lithium battery chemical system has developed rapidly. Due to the large amount of energy stored in lithium batteries, if the device selection does not take into account the short-circuit tolerance current range, it may cause the system to explode and catch fire during the short-circuit process, causing direct economic losses.

[0003] However, the failure to calculate and check the short-circuit withstand current in advance during the system design process resulted in high trial and error costs and a project schedule that could not meet the product development cycle. In addition, the short-circuit withstand current of the fuse is either too small, which results in the short-circuit withstand current being greater than the short-circuit withstand current of the fuse in the event of an extreme short circuit in the system, which in turn causes the fuse to explode and the energy storage system to catch fire, posing a safety risk; or the short-circuit withstand current of the fuse is either too large, which makes the product bulky and requires a larger space for design. If the space is too small, it may lead to insufficient electrical clearance and creepage distance, which also poses a safety risk. Summary of the invention

[0004] In view of this, the present application proposes an energy storage container and a fuse adaptation method, which can verify the selection of fuses 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 inadequate short-circuit protection, and at the same time improve the accuracy of fuse adaptation, so that the relevant components of short-circuit protection are smaller in size, thereby improving electrical safety while also reducing costs.

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

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

[0007] By utilizing the processing unit to detect the short-circuit withstand current of the branch where the high-voltage box is located when a short circuit occurs in the container, and selecting the fuse in the first short-circuit protection unit that is adapted to the energy storage container according to the short-circuit withstand current, according to various aspects of the present application, the selection of the fuse can be checked in advance from the overall perspective of the energy storage container, thereby improving the reliability and rationality of the short-circuit protection, reducing the safety risks caused by inadequate short-circuit protection, and improving the accuracy of fuse adaptation, so that the relevant components of the short-circuit protection are smaller in size, thereby improving electrical safety while also reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction 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 showing a short circuit of a single combiner cabinet according to an embodiment of the present application.

[0014] Figure 6 A schematic diagram showing a short circuit in one of the multiple combiner cabinets according to an embodiment of the present application.

[0015] Figure 7 A schematic diagram showing a short circuit occurring in one of the battery clusters of multiple combiner cabinets according to an embodiment of the present application.

[0016] Figure 8 A flow chart of a fuse adaptation 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 described clearly and completely below in conjunction with 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0018] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may 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 clearly and specifically defined.

[0019] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0020] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the examples of various specific processes and materials provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials. In some instances, methods, means, components and circuits well known to those skilled in the art are not described in detail, so as to highlight the subject matter of the present application.

[0021] Figure 1 FIG. 1 is a block diagram of a first energy storage container according to an embodiment of the present application. Figure 1 As shown, the energy storage container of the present application includes a confluence unit 100, a processing unit 200, a plurality of high-voltage boxes 300 and a plurality of battery clusters 400, wherein one of the battery clusters 400 is electrically connected to one of the high-voltage boxes 300, a plurality of the high-voltage boxes 300 are confluenced to the confluence unit 100, and the processing unit 200 is electrically connected to a plurality of the high-voltage boxes 300. The 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 where the high-voltage box 300 is located when a short circuit occurs in the container, and the processing unit 200 is used to select a fuse in the first short-circuit protection unit 301 that is adapted to the energy storage container according to the short-circuit withstand current.

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

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

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

[0025] The first short-circuit protection unit of the high-voltage box 300 includes at least two different types of fuses. Due to the different types of fuses, the maximum short-circuit withstand 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 automatically selects a fuse that is suitable for the energy storage container according to the situation.

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

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

[0028] The high voltage box 300 may further include a second short circuit protection unit 303, which is electrically connected to the battery cluster 400 corresponding to the high voltage box 300 and the busbar unit 100. A plurality of the second short circuit protection units 303 of the plurality of high voltage boxes 300 are connected to the busbar 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. Due to the different types of fuses, the maximum short-circuit withstand 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 automatically selects a fuse that is suitable for the energy storage container according to the situation.

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

[0031] Figure 3 A schematic diagram of a centralized energy storage container according to an embodiment of the present application is shown. Figure 3 As shown, the junction unit 100 includes a junction cabinet, and the junction cabinet includes a first isolating switch K11 and a second isolating switch K12. The first end of the first isolating switch K11 is electrically connected to the energy storage converter, and the second end of the first isolating switch K11 is electrically connected to the first short-circuit protection units of the plurality of high-voltage boxes 300; the first end of the second isolating switch K12 is electrically connected to the energy storage converter, and the second end of the second isolating switch K12 is electrically connected to the second short-circuit protection units of the plurality of high-voltage boxes 300. Specifically, the second end of the first isolating switch K11 is electrically connected to the first protection switches K21 of the plurality of high-voltage boxes 300, and the second end of the second isolating switch K12 is electrically connected to the second protection switches K22 of the plurality of high-voltage boxes 300. The fuse of the first short-circuit protection unit is FUSE1, and the fuse of 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 the present application is shown. Figure 4 As shown, the energy storage converter PCS has multiple branches, each branch is 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 a branch of the energy storage converter.

[0033] In one embodiment, a plurality of the first short-circuit protection units 301 are electrically connected to the first isolating switch, and a plurality of the second short-circuit protection units 303 are electrically connected to the second isolating switch, wherein when at least one battery cluster 400 is short-circuited, the processing unit 200 is used to calculate the sum of the short-circuit withstand currents of the nx battery clusters 400, and select the fuse in the first short-circuit protection unit 301 adapted to the energy storage container according to the sum of the short-circuit withstand currents of the nx battery clusters 400, where x is the number of battery clusters 400 that are short-circuited.

[0034] Figure 5 A schematic diagram showing a short circuit of a single combiner cabinet in an embodiment of the present application is shown. Figure 5 As shown, the short-circuit position is on one side of the battery cluster 400, indicated by an asterisk. Assuming that the number of battery clusters 400 connected to the busbar unit 100 is 6, when a busbar cabinet is provided in the energy storage container, the battery cluster 400 on the far right is short-circuited. According to Kirchhoff's law, the short-circuit withstand current flows through the busbar in the busbar cabinet to the short-circuit point of the branch where the faulty battery cluster 400 is located. At this time, the maximum short-circuit withstand current borne by the busbar in the busbar cabinet is the sum of the short-circuit withstand currents of all other branches where no fault occurs, that is, the sum of the short-circuit withstand currents of the 5 clusters. Taking the example that each branch where the battery cluster 400 is located can withstand a short-circuit withstand current of 21kA, the maximum short-circuit withstand current borne by the busbar in the busbar cabinet is 21kA*5=105kA.

[0035] In one embodiment, the combiner unit 100 includes at least two combiner cabinets, the at least two combiner cabinets are arranged in parallel, and the 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 at least two of the combiner cabinets, the processing unit 200 is used to calculate the sum of the short-circuit withstand currents of the n battery clusters 400 , and select a fuse in the first short-circuit protection unit 301 adapted to the energy storage container according to the sum of the short-circuit withstand currents of the n battery clusters 400 .

[0037] Figure 6 A schematic diagram showing a short circuit in one of the multiple combiner cabinets in an embodiment of the present application is shown. Figure 6 As shown, the busbar unit 100 includes a busbar cabinet 101 and a busbar cabinet 102, and a short circuit occurs in the busbar cabinet 102. Since the two busbar cabinets are arranged in parallel, according to Kirchhoff's law, the short-circuit withstand current flows through the main circuit of the busbar cabinet 101 to the short-circuit point of the busbar cabinet 102. At this time, the maximum short-circuit withstand current of the busbar is the sum of the short-circuit withstand currents of the six clusters, that is, 21kA*6=126kA.

[0038] When at least one battery cluster 400 is short-circuited, the processing unit 200 is used to calculate the sum of the short-circuit withstand currents of the 2n-x battery clusters 400, and select the fuse adapted to the energy storage container in the first short-circuit protection unit 301 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 that are short-circuited.

[0039] Figure 7 A schematic diagram showing a short circuit in one of the battery clusters of the multiple combiner cabinets of the embodiment of the present application. Figure 7 As shown, the busbar unit 100 includes a busbar cabinet 101 and a busbar cabinet 102, and a short circuit occurs in the battery cluster 400 on the far right. Since the two busbar cabinets are arranged in parallel, according to Kirchhoff's law, the short-circuit withstand current of the other busbar cabinet 102 flows to the short-circuit point through the busbar cabinet 101, and the maximum short-circuit withstand current of the high-voltage box 300 is the sum of the short-circuit withstand currents of 6 clusters plus the sum of the short-circuit withstand currents of 5 clusters, a total of 11 clusters of short-circuit withstand currents, that is, 21kA*11=231kA.

[0040] In one embodiment, the battery cluster 400 includes a plurality of battery cells, and the processing unit 200 is further used to: obtain a correction coefficient of the short-circuit withstand current of the battery cell before selecting a fuse adapted to the energy storage container in the first short-circuit protection unit 301 according to the short-circuit withstand current; and determine the short-circuit withstand current according to the correction coefficient and the nominal withstand current of the battery cell.

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

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

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

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

[0045] Figure 8 FIG. 1 is a flow chart showing a fuse adaptation method according to an embodiment of the present application. Figure 8 As shown, the fuse adaptation method is applied to the energy storage container, and the fuse adaptation method includes:

[0046] Step S1: Obtaining the short-circuit withstand current of the battery cell;

[0047] In one embodiment, the short-circuit withstand current of the battery cell is determined according to the correction coefficient and the nominal withstand current of the battery cell. For example, the correction coefficient may be 1.53, and the nominal withstand current may be 32 kA. By multiplying the correction coefficient and the nominal withstand current of the battery cell, the short-circuit withstand current of the battery cell may be 21 kA.

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

[0049] In one embodiment, each combiner cabinet in the combiner unit is provided with a second current detection unit for detecting whether the combiner cabinet is short-circuited. The processing unit determines the location of the combiner cabinet or battery cluster with a short circuit 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 withstand current that the energy storage container can withstand.

[0050] Among them, when at least one battery cluster 400 is short-circuited, the processing unit 200 is used to calculate the sum of the short-circuit withstand currents of nx battery clusters 400, and select the fuse adapted to the energy storage container in the first short-circuit protection unit 301 according to the sum of the short-circuit withstand currents of the nx battery clusters 400, where x is the number of battery clusters 400 that are short-circuited.

[0051] For the architecture of multiple combiner cabinets, when a short circuit occurs in one of at least two combiner cabinets, the processing unit 200 is used 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 adapted to 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 at least one battery cluster 400 is short-circuited, the processing unit 200 is used to calculate the sum of the short-circuit withstand currents of the 2n-x battery clusters 400, and select the fuse adapted to the energy storage container in the first short-circuit protection unit 301 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 that are short-circuited.

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

[0054] In one embodiment, the first short-circuit protection unit is provided with a plurality of fuses of different types. 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 the maximum short-circuit withstand current of 126 kA can be selected and connected in the first short-circuit protection unit through the first protection switch.

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

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

[0057] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0058] The energy storage container and the fuse adaptation method provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage container, characterized in that: include: Confluence unit; A plurality of high-voltage boxes, wherein the plurality of high-voltage boxes are connected to the merging unit; A plurality of battery clusters, one of the battery clusters being electrically connected to one of the high voltage boxes; A processing unit, electrically connected to the plurality of high-voltage boxes; Among them, 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 current detection unit is used to detect the short-circuit withstand current of the branch where the high-voltage box is located when a short circuit occurs in the container, and the processing unit is used to select a fuse in the first short-circuit protection unit that is adapted to the energy storage container according to the short-circuit withstand current.

2. The energy storage container according to claim 1, characterized in that: The high-voltage box and the battery cluster are each provided with n, where n is a positive integer, wherein the first short-circuit protection unit of the high-voltage box includes at least two different types of fuses, and the maximum short-circuit withstand currents that can be borne by different types of fuses are different, and the processing unit is used to select a fuse of a target type adapted to the energy storage container in the first short-circuit protection unit according to the short-circuit withstand current.

3. The energy storage container according to claim 1, characterized in that: The high-voltage box further includes a second short-circuit protection unit, which is electrically connected to the battery cluster corresponding to the high-voltage box and the busbar unit, and is connected in parallel to the first short-circuit protection unit.

4. The energy storage container according to claim 1, characterized in that: The junction unit includes a junction cabinet, the junction cabinet includes a first isolating switch, and multiple first short-circuit protection units are electrically connected to the first isolating switch, wherein when at least one battery cluster is short-circuited, the processing unit is used to calculate the sum of the short-circuit withstand currents of nx battery clusters, and select the fuse in the first short-circuit protection unit that is adapted to the energy storage container according to the sum of the short-circuit withstand currents of the nx battery clusters, where x is the number of battery clusters that are short-circuited.

5. The energy storage container according to claim 3, characterized in that: The combiner cabinet includes a second isolating switch, and multiple second short-circuit protection units are electrically connected to the second isolating switch, wherein the first end of the second isolating switch is electrically connected to the energy storage inverter, and the second end of the second isolating switch is electrically connected to multiple second short-circuit protection units of the high-voltage box.

6. The energy storage container according to claim 3, characterized in that: The merge unit includes at least two merge cabinets, at least two of the merge cabinets are arranged in parallel, and multiple high-voltage boxes are electrically connected to one of the at least two merge cabinets. A second current detection unit is provided in the merge cabinet for detecting whether the merge cabinet is short-circuited.

7. The energy storage container according to claim 6, characterized in that: When a short circuit occurs in one of at least two of the combiner cabinets, the processing unit is used to calculate the sum of the short-circuit withstand currents of the n battery clusters, and select a fuse in the first short-circuit protection unit that is adapted to the energy storage container according to the sum of the short-circuit withstand currents of the n battery clusters.

8. The energy storage container according to claim 6, characterized in that: When at least one battery cluster is short-circuited, the processing unit is used to calculate the sum of the short-circuit withstand currents of the 2n-x battery clusters, and select the fuse in the first short-circuit protection unit that is adapted to the energy storage container according to the sum of the short-circuit withstand currents of the 2n-x battery clusters, where x is the number of battery clusters that are short-circuited.

9. The energy storage container according to any one of claims 1 to 8, characterized in that: The battery cluster includes multiple battery cells. Before the processing unit selects the fuse in the first short-circuit protection unit adapted to the energy storage container according to the short-circuit withstand current, it is also used to: obtain a correction coefficient of the short-circuit withstand current of the battery cell; determine the short-circuit withstand current according to the correction coefficient and the nominal withstand current of the battery cell.

10. A fuse adaptation method, characterized in that: The fuse adaptation method is applied to the energy storage container according to any one of claims 1 to 9, and the fuse adaptation method includes: Obtain the short-circuit withstand current of the battery cell; Calculating a maximum short-circuit withstand current that the energy storage container can withstand according to the short-circuit withstand current and the short-circuit position in the energy storage container; A fuse adapted to the energy storage container is selected in the first short-circuit protection unit of the high-voltage box based on the maximum short-circuit withstand current that the energy storage container can withstand.

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