Energy storage container and fuse adaptation method

Abstract

The present application relates to an energy storage container and a fuse adaptation 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, each battery cluster being electrically connected to a corresponding high-voltage box; and a processing unit electrically connected to the plurality of high-voltage boxes. The high-voltage boxes each comprise 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 units are electrically connected to the processing unit.

Description

Energy storage container and fuse adapter method

[0001] The present application claims priority to the Chinese patent application No. 2024112731798 filed on September 11, 2024 with the China Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to an energy storage container and a fuse adapter method. BACKGROUND

[0003] With the perfection of energy storage systems and economic development needs, the power storage system industry of lithium battery chemical system develops rapidly. Since the energy stored by the lithium battery is large, if the short-circuit current range is not considered in the overall selection of the device, the system may explode and catch fire during a short-circuit process, causing direct economic losses.

[0004] However, since the short-circuit current size is not calculated and checked in advance in the system scheme design process, the trial and error cost is high and the project progress cannot meet the product development cycle. Moreover, if the short-circuit current of the fuse is selected to be small, the short-circuit current of the system in an extreme short-circuit condition is greater than the short-circuit current of the fuse, which may cause the fuse to explode and the energy storage system to catch fire, posing a safety risk. If the short-circuit current of the fuse is selected to be large, the product size is large, which requires a larger space for design. If the space is small, the electrical clearance and creepage distance may be insufficient, also posing a safety risk. SUMMARY

[0005] The present application proposes an energy storage container and a fuse adapter method, which 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 inadequate short-circuit protection, and improve the accuracy of fuse adaptation, so that the related components of short-circuit protection are smaller in size, improving electrical safety while reducing costs.

[0006] According to an aspect of the present application, a kind of energy storage container is provided, comprising: a plurality of high voltage boxes, a plurality of the high voltage boxes converge in the current collecting unit;A plurality of battery clusters, a battery cluster is electrically connected to a high voltage box;Processing unit, electrically connected to a plurality of high voltage boxes;Wherein, the high voltage box includes first short-circuit protection unit and the 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 to detect the short-circuit current of the branch where the high voltage box is located when there is short circuit in the container, and the processing unit is used to select the fuse in the first short-circuit protection unit that adapts to the energy storage container according to the short-circuit current.

[0007] According to another aspect of the present application, a kind of fuse adaptation method is provided, which is applied to the energy storage container, and the fuse adaptation method comprises: obtaining the short-circuit current of the battery cell;According to the short-circuit current and the short-circuit position in the energy storage container, the maximum short-circuit current that the energy storage container can withstand is calculated;Based on the maximum short-circuit current that the energy storage container can withstand, the fuse in the first short-circuit protection unit of high voltage box that adapts to the energy storage container is selected. Beneficial effects

[0008] By detecting the short-circuit current of the branch where the high voltage box is located when there is short circuit in the container by using the processing unit, and selecting the fuse in the first short-circuit protection unit that adapts to the energy storage container according to the short-circuit current, according to the aspects of the present application, the selection of the fuse can be checked in advance from the overall perspective of the energy storage container, the reliability and rationality of short-circuit protection are improved, the safety risk caused by insufficient short-circuit protection is reduced, and the accuracy of fuse adaptation is improved, so that the related components of short-circuit protection are smaller in size, the electrical safety is improved, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 shows a block diagram of a first energy storage container according to an embodiment of the present application.

[0010] Fig. 2 shows a block diagram of a second energy storage container according to an embodiment of the present application.

[0011] Fig. 3 shows a schematic diagram of a centralized energy storage container according to an embodiment of the present application.

[0012] Fig. 4 shows a schematic diagram of a distributed energy storage container according to an embodiment of the present application.

[0013] Fig. 5 shows a schematic diagram of a single current collecting cabinet short circuit according to an embodiment of the present application.

[0014] Fig. 6 shows a schematic diagram of a plurality of current collecting cabinets in which one current collecting cabinet is short-circuited according to an embodiment of the present application.

[0015] FIG. 7 shows a schematic diagram of a short circuit occurring in one battery cluster of a plurality of busbars of an embodiment of the present application.

[0016] FIG. 8 shows a flow chart of a fuse adaptation method of an embodiment of the present application. Embodiments of the present application

[0017] For the purpose of making the purpose, technical solutions and effects of the present application more clear and explicit, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0018] FIG. 1 shows a block diagram of a first energy storage container of an embodiment of the present application. As shown in FIG. 1, the energy storage container of the present application includes a busbar unit 100, a processing unit 200, a plurality of high-voltage boxes 300, and a plurality of battery clusters 400, 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 connected to the busbar unit 100, and the processing unit 200 is electrically connected to a plurality of the high-voltage boxes 300. Among them, 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, and the first current detection unit 302 is used to detect the short circuit tolerance current of the branch where the high-voltage box 300 is located when a short circuit exists in the container, and the processing unit 200 is used to select a fuse in the first short circuit protection unit 301 that is suitable for the energy storage container according to the short circuit tolerance current.

[0019] In an embodiment, the busbar unit 100 is electrically connected to a power conversion system (PCS), which can convert direct current from each battery cluster 400 into alternating current to discharge to an external load, or convert alternating current from the external power supply into direct current to charge each battery cluster 400. The power conversion system can communicate with a battery management system (BMS) through a controller area network (CAN) bus, and the present application does not limit the setting of the power conversion system.

[0020] A single busbar cabinet can be provided in the busbar unit 100, or a plurality of busbar cabinets can be provided. The busbar cabinet can be provided with a busbar. When a plurality of busbar cabinets are provided in the busbar unit 100, a plurality of the busbar cabinets can be connected in parallel and electrically connected to the power conversion system.

[0021] The battery cluster 400 includes a plurality of battery packs, and each battery pack includes a plurality of battery cells. The plurality of battery cells in each battery pack are arranged in rows and columns, and the plurality of battery packs are connected in series to form the battery cluster 400. The high-voltage box 300 and the battery cluster 400 each have 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.

[0022] 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 automatically selects a fuse that is suitable for the energy storage container according to the situation.

[0023] 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.

[0024] FIG. 2 shows a block diagram of a second energy storage container according to an embodiment of the present application. As shown in FIG. 2, 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 bus unit 100. The first protection switch can be used to connect a target type of fuse.

[0025] The high-voltage box 300 can further 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. A plurality of second short-circuit protection units 303 of a plurality of 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.

[0026] In an 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 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 automatically selects a fuse that is suitable for the energy storage container according to the situation.

[0027] The second short-circuit protection unit of the high-voltage box 300 further comprises 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 bus unit 100. The second protection switch can be used to connect the target type of fuse.

[0028] FIG. 3 shows a schematic diagram of a centralized energy storage container according to an embodiment of the present application. As shown in FIG. 3, the bus unit 100 comprises a bus cabinet, and the bus cabinet comprises a first isolation switch K11 and a second isolation switch K12. A first end of the first isolation switch K11 is electrically connected to an energy storage converter, and a second end of the first isolation switch K11 is electrically connected to a first short-circuit protection unit of a plurality of high-voltage boxes 300. A first end of the second isolation switch K12 is electrically connected to the energy storage converter, and a second end of the second isolation switch K12 is electrically connected to a second short-circuit protection unit of the plurality of high-voltage boxes 300. Specifically, the second end of the first isolation switch K11 is electrically connected to a first protection switch K21 of the plurality of high-voltage boxes 300, and the second end of the second isolation switch K12 is electrically connected to a second protection switch 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.

[0029] FIG. 4 shows a schematic diagram of a distributed energy storage container according to an embodiment of the present application. As shown in FIG. 4, the energy storage converter PCS has a plurality of branches, and 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 one branch of the energy storage converter.

[0030] In an embodiment, a plurality of the first short-circuit protection units 301 are electrically connected to the first isolation switch, and a plurality of the second short-circuit protection units 303 are electrically connected to the second isolation switch. When at least one battery cluster 400 is short-circuited, the processing unit 200 is configured to calculate a sum of short-circuit withstand currents of n-x battery clusters 400, and select a fuse in the first short-circuit protection unit 301 that is suitable for the energy storage container according to the sum of short-circuit withstand currents of the n-x battery clusters 400, where x is the number of battery clusters 400 that are short-circuited.

[0031] Figure 5 shows a schematic diagram of a single busbar cabinet short circuit according to an embodiment of the present application. As shown in Figure 5, the short circuit position is on one side of the battery cluster 400, indicated by a star. Assuming that the number of battery clusters 400 connected to the busbar unit 100 is 6 clusters, when the rightmost battery cluster 400 cluster short circuits, 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 that the busbar in the busbar cabinet can withstand is the sum of the short circuit withstand currents of all the other battery clusters 400 in the branch, i.e. the sum of the short circuit withstand currents of 5 clusters. Taking the example of a short circuit withstand current of 21 kA for each battery cluster 400 in the branch, the maximum short circuit withstand current that the busbar in the busbar cabinet can withstand is 21 kA*5 = 105 kA.

[0032] In an embodiment, the busbar unit 100 comprises at least two busbar cabinets, and the at least two busbar cabinets are connected in parallel, and a plurality of high-voltage boxes 300 are electrically connected to one of the at least two busbar cabinets.

[0033] When a short circuit occurs in one of the at least two busbar cabinets, the processing unit 200 is configured to calculate the sum of the short circuit withstand currents of n battery clusters 400, and select a 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.

[0034] Figure 6 shows a schematic diagram of a short circuit occurring in one of a plurality of busbar cabinets according to an embodiment of the present application. As shown in Figure 6, the busbar unit 100 comprises 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 connected 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 that the busbar can withstand is the sum of the short circuit withstand currents of 6 clusters, i.e. 21 kA*6 = 126 kA.

[0035] 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 2n-x battery clusters 400, and select a 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 that have short circuited.

[0036] Fig. 7 shows a schematic diagram of a short circuit occurring in one battery cluster of a plurality of busbars of an embodiment of the present application. As shown in Fig. 7, the busbar unit 100 includes busbar 101 and busbar 102, and a short circuit occurs in the rightmost battery cluster 400. Since the two busbars are connected in parallel, according to Kirchhoff's law, the short circuit withstand current of the other busbar 102 flows through the busbar 101 to the short circuit point, 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, i.e. the sum of the short circuit withstand currents of 11 clusters, which is 21kA*11=231kA.

[0037] In an embodiment, the battery cluster 400 includes a plurality of battery cells, and the processing unit 200 is further configured to, before selecting the first short circuit protection unit 301 according to the short circuit withstand current, obtain a correction coefficient of the short circuit withstand current of the battery cells, and determine the short circuit withstand current according to the correction coefficient and the nominal withstand current of the battery cells.

[0038] 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 withstand current of the single battery cell can be represented as: I1=U1 / R1=3.2V / 0.1mΩ=32kA. Wherein, I1 is the short circuit withstand 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 internal resistance value of the single battery cell does not need to be corrected.

[0039] For a battery pack composed of this type of battery cell, the short circuit withstand current of the battery pack can be represented as: Ip=Up / Rp=(3.2*52)V / (0.1*52)mΩ=32kA. Wherein, Ip is the short circuit withstand 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.

[0040] For a battery cluster 400 composed of a plurality of battery packs, the short circuit withstand current of the battery cluster 400 can be represented as: Ic=Uc / Rc=(3.2*416)V / (0.1*416)mΩ=32kA. Wherein, Ic is the short circuit withstand current of the single cluster, Uc is the rated voltage of the single cluster, and Rc is the internal resistance value of the single cluster. The cluster-level resistance correction coefficient 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.

[0041] The present application also provides an energy storage system, which includes the energy storage container.

[0042] FIG. 8 shows a flow chart of a fuse adaptation method according to an embodiment of the present application. As shown in FIG. 8, the fuse adaptation method is applied to the energy storage container, and the fuse adaptation method comprises the following steps:

[0043] Step S1: obtaining a short-circuit tolerance current of the battery cell;

[0044] In an embodiment, the short-circuit tolerance current of the battery cell is determined according to the correction coefficient and a nominal tolerance current of the battery cell. For example, the correction coefficient can be 1.53, and the nominal tolerance current can be 32kA. The short-circuit tolerance current of the battery cell can be obtained by dividing the nominal tolerance current by the correction coefficient, i.e., 21kA.

[0045] Step S2: 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;

[0046] 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.

[0047] 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, where x is the number of battery clusters 400 that are short-circuited.

[0048] For the multi-busbar cabinet architecture, when at least one busbar cabinet of the at least two busbar cabinets is short-circuited, the processing unit 200 is configured to calculate the sum of the short-circuit tolerance currents of 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 tolerance currents of n battery clusters 400.

[0049] For the multi-busbar cabinet architecture, 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 2n-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 2n-x battery clusters 400, where x is the number of battery clusters 400 that are short-circuited.

[0050] 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 of the energy storage container.

[0051] 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 of the energy storage container is calculated to be 126kA, a fuse with a maximum short-circuit withstand current of 126kA can be selected to be connected by the first protection switch in the first short-circuit protection unit.

[0052] 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 a fuse in the second 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 of the energy storage container, and the working principle is the same as that of the first short-circuit protection unit, which will not be described again.

[0053] In summary, by detecting the short-circuit withstand 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 a fuse in the first short-circuit protection unit that is adapted to the energy storage container according to the short-circuit withstand current, the 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 inadequate short-circuit protection, and at the same time improve the accuracy of fuse adaptation, so that the related components of short-circuit protection are smaller in size, which improves electrical safety while reducing costs.

[0054] It can be understood that for those skilled in the art, equivalent replacements or changes can be made according to the technical solutions and inventive concepts of the application, and all such changes or replacements shall fall within the protection scope of the claims appended to the application.

Claims

1. A container for energy storage, 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 of the battery clusters being electrically connected to one of the high-voltage boxes; a processing unit being electrically connected to the plurality of high-voltage boxes; wherein the high-voltage box comprises a plurality of first short-circuit protection units and a plurality of first current detection units being electrically connected to the first short-circuit protection units, the first short-circuit protection units being electrically connected to the processing unit, the first current detection units being configured to detect a short-circuit tolerance current of a branch in which the high-voltage box is located when a short circuit exists in the container, and the processing unit being configured to select a fuse of the first short-circuit protection units that is suitable for the container for energy storage according to the short-circuit tolerance current.

2. The energy storage container of claim 1, wherein, The high-voltage box and the battery cluster are each provided with n, n being a positive integer, the first short-circuit protection units of the high-voltage box comprising at least two different types of fuses, the different types of fuses being capable of bearing different maximum short-circuit tolerance currents, and the processing unit being configured to select a fuse of the first short-circuit protection units that is suitable for a target type of the container for energy storage according to the short-circuit tolerance current. 3.The container for energy storage of claim 1, wherein the high-voltage box further comprises a plurality of second short-circuit protection units, the second short-circuit protection units being electrically connected to the corresponding battery cluster of the high-voltage box and the busbar unit, and the second short-circuit protection units being connected in parallel to the first short-circuit protection units.

4. The energy storage container of claim 1, wherein, The busbar unit comprises a busbar cabinet, the busbar cabinet comprises a first disconnecting switch, and the plurality of first short-circuit protection units are electrically connected to the first disconnecting switch, wherein, when at least one battery cluster is short-circuited, the processing unit is configured to calculate a sum of short-circuit tolerance currents of n-x battery clusters and select a fuse of the first short-circuit protection units that is suitable for the container for energy storage according to the sum of short-circuit tolerance currents of n-x battery clusters, x being a number of short-circuited battery clusters.

5. The energy storage container of claim 3, wherein, The busbar cabinet comprises a second disconnecting switch, and the plurality of second short-circuit protection units are electrically connected to the second disconnecting switch, wherein a first end of the second disconnecting switch is electrically connected to an energy storage converter, and a second end of the second disconnecting switch is electrically connected to the second short-circuit protection units of the plurality of high-voltage boxes.

6. The energy storage container of claim 3, wherein, The busbar unit comprises at least two busbar cabinets, the at least two busbar cabinets being connected in parallel, the plurality of high-voltage boxes being electrically connected to one of the at least two busbar cabinets, and the busbar cabinet being provided with a second current detection unit, the second current detection unit being configured to detect whether the busbar cabinet is short-circuited.

7. The energy storage container of claim 6, wherein, When one of the at least two busbar cabinets is short-circuited, the processing unit is configured to calculate a sum of short-circuit tolerance currents of n battery clusters and select a fuse of the first short-circuit protection units that is suitable for the container for energy storage according to the sum of short-circuit tolerance currents of n battery clusters.

8. The energy storage container of claim 6, wherein, When at least one battery cluster is short-circuited, the processing unit is configured to calculate the sum of the short-circuit resistance currents of the 2n-x battery clusters, and select the fuse in the first short-circuit protection unit that is suitable for the energy storage container according to the sum of the short-circuit resistance currents of the 2n-x battery clusters, where x is the number of short-circuited battery clusters.

9. The energy storage container of any of claims 1-8, wherein, The battery cluster includes a plurality of battery cells, and before selecting the fuse in the first short-circuit protection unit that is suitable for the energy storage container according to the short-circuit resistance current, the processing unit is further configured to: obtain a correction coefficient of the short-circuit resistance current of the battery cell; and determine the short-circuit resistance current according to the correction coefficient and a nominal resistance current of the battery cell.

10. The energy storage container of claim 9, wherein, The short-circuit resistance current is equal to the nominal resistance current divided by the correction coefficient.

11. An energy storage container, 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 of the battery clusters being electrically connected to one of the high-voltage boxes; a processing unit being electrically connected to the plurality of high-voltage boxes; wherein the high-voltage box includes a plurality of first short-circuit protection units and a plurality of first current detection units being electrically connected to the first short-circuit protection units, the first short-circuit protection units being electrically connected to the processing unit, the first current detection units being configured to detect a short-circuit resistance current of a branch in which the high-voltage box is located when a short circuit exists in the container, and the processing unit being configured to select 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 energy storage container is a distributed energy storage container or a centralized energy storage container.

12. The energy storage container of claim 11, wherein, The high-voltage box and the battery cluster are each provided with n, n being a positive integer, the first short-circuit protection unit of the high-voltage box including at least two different types of fuses, the different types of fuses being able to withstand different maximum short-circuit resistance currents, and the processing unit being configured to select a fuse in the first short-circuit protection unit that is suitable for the energy storage container according to the target type of fuse according to the short-circuit resistance current.

13. The energy storage container of claim 11, wherein the high-voltage box further includes a plurality of second short-circuit protection units, the second short-circuit protection units being electrically connected to the corresponding battery cluster of the high-voltage box and the busbar unit, and the second short-circuit protection units being connected in parallel to the first short-circuit protection units.

14. The energy storage container of claim 11, wherein, The busbar unit includes a busbar cabinet, the busbar cabinet including a first disconnecting switch, and the plurality of first short-circuit protection units being electrically connected to the first disconnecting switch, wherein when at least one battery cluster is short-circuited, the processing unit is configured to calculate the sum of the short-circuit resistance currents of the n-x battery clusters, and select the fuse in the first short-circuit protection unit that is suitable for the energy storage container according to the sum of the short-circuit resistance currents of the n-x battery clusters, where x is the number of short-circuited battery clusters.

15. The energy storage container of claim 13, wherein, The busbar cabinet comprises a second disconnecting switch, and a plurality of the second short-circuit protection units are electrically connected to the second disconnecting switch, wherein a first end of the second disconnecting switch is electrically connected to the energy storage converter, and a second end of the second disconnecting switch is electrically connected to the second short-circuit protection unit of the plurality of high-voltage boxes.

16. The energy storage container of claim 13, wherein, The busbar unit comprises at least two busbar cabinets, and the at least two busbar cabinets are arranged in parallel, a plurality of the high-voltage boxes are electrically connected to one of the at least two busbar cabinets, and a second current detection unit is arranged in the busbar cabinet, and the second current detection unit is configured to detect whether the busbar cabinet is short-circuited.

17. The energy storage container of claim 16, wherein, When a short circuit occurs in one of the at least two busbar cabinets, the processing unit is configured to calculate the sum of the short-circuit withstand currents of n battery clusters, and select the fuse in the first short-circuit protection unit that is suitable for the energy storage container according to the sum of the short-circuit withstand currents of the n battery clusters.

18. The energy storage container of claim 16, wherein, When a short circuit occurs in at least one battery cluster, the processing unit is configured to calculate the sum of the short-circuit withstand currents of 2n-x battery clusters, and select the fuse in the first short-circuit protection unit that is suitable for the energy storage container according to the sum of the short-circuit withstand currents of the 2n-x battery clusters, wherein x is the number of battery clusters in which the short circuit occurs.

19. The energy storage container of any of claims 11-18, wherein, The battery cluster comprises a plurality of battery cells, and before the fuse in the first short-circuit protection unit that is suitable for the energy storage container is selected according to the short-circuit withstand current, the processing unit is further configured to: obtain a correction coefficient of the short-circuit withstand current of the battery cell; and determine the short-circuit withstand current according to the correction coefficient and the nominal withstand current of the battery cell.

20. A fuse adaptation method, the fuse adaptation method being applied to the energy storage container according to any one of claims 1-19, and the fuse adaptation method comprising: obtaining a short-circuit withstand current of a battery cell; calculating a maximum short-circuit withstand current that can be borne by the energy storage container according to the short-circuit withstand current and a short-circuit position in the energy storage container; selecting a fuse in a first short-circuit protection unit of a high-voltage box that is suitable for the energy storage container based on the maximum short-circuit withstand current that can be borne by the energy storage container.

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