energy storage device

Abstract

The application discloses an energy storage device, which comprises a cabinet body, a plurality of electrical devices, a plurality of battery modules and a first conductive member. The cabinet body comprises a first cavity and a second cavity arranged along a first direction. The plurality of electrical devices are arranged in the first cavity. The plurality of battery modules are arranged in the second cavity. The first conductive member connects at least one electrical device and at least one battery module.

Description

Technical Field

[0001] This application relates to the field of energy storage, and in particular to an energy storage device. Background Technology

[0002] Against the backdrop of increased global support for the development of new energy technologies, various energy storage-related technologies have been widely applied. The development of energy storage devices requires consideration of multiple design factors, such as heat dissipation performance, cycle life, and cost, as well as the safety performance of the energy storage devices.

[0003] The way battery modules and electrical modules are arranged in the cabinet of an energy storage device may affect the safety performance of the energy storage device. Utility Model Content

[0004] This application provides an energy storage device that helps improve the safety performance of the energy storage device.

[0005] Firstly, this application provides an energy storage device, which includes a cabinet, multiple electrical devices, multiple battery modules, and a first conductive element. The cabinet includes a first cavity and a second cavity arranged along a first direction. The multiple electrical devices are disposed in the first cavity. The multiple battery modules are disposed in the second cavity. The first conductive element connects at least one electrical device and at least one battery module. The multiple electrical devices and multiple battery modules are placed in different cavities, reducing the impact of potential battery module failures such as thermal runaway, short circuits, and leakage on the electrical devices, thereby improving the reliability and safety of the energy storage device. The electrical devices and battery modules are placed in independent cavities, with functional partitioning, facilitating debugging, replacement, and maintenance. In addition, the internal cavity design of the cabinet allows for flexible planning of the cavity layout according to the number and specifications of the electrical devices and battery modules, improving space waste in mixed-use configurations.

[0006] In one or more of the above optional embodiments, multiple battery modules are arranged along a second direction. Each battery module includes a first electrical connection terminal and a second electrical connection terminal, with opposite polarities. The second direction is perpendicular to the first direction. The first electrical connection terminal of the uppermost battery module serves as the first common terminal for the multiple battery modules. The electrical device includes a high-voltage box. A first conductive element includes a first wiring harness connected to the first common terminal and extending through a second cavity into the first cavity to connect to the high-voltage box. The first conductive element is concealed within the cavity for wiring, and the wiring path of the first conductive element is optimized. Furthermore, this provides a certain degree of protection for the first conductive element.

[0007] In one or more of the above optional embodiments, the second electrical connection terminal of the bottommost battery module serves as the second common terminal for multiple battery modules. The first conductive element includes a second wiring harness connected to the second common terminal and extending through the second cavity into the first cavity to connect with the high-voltage box. The positive or negative terminals of the multiple battery modules are located at both ends and are electrically connected to the high-voltage box via the first and second wiring harnesses, respectively, optimizing the connection method of the first conductive element and reducing the error rate of wiring. Moreover, with the positive and negative terminals located at both ends, the first conductive element can use straight wiring, reducing resistance loss caused by bending and tangling.

[0008] In one or more of the above optional embodiments, a portion of the second wiring harness is fixed to the first wiring harness to form a convergence section. The cabinet includes a top wall and a bottom wall disposed opposite each other along a second direction, and a portion of the convergence section is accommodated between the top wall and the uppermost battery module. By planning the wiring path of the first conductive component and concealing part of the first conductive component, direct contact between high-temperature and high-pressure materials and the first conductive component can be effectively reduced, thereby improving the protective performance and service life of the first conductive component.

[0009] In one or more of the above optional embodiments, the energy storage device includes multiple signal harnesses, and the signal connection terminals between adjacent battery modules are connected through the signal harnesses. The signal connection terminal of the uppermost battery module is connected to the high-voltage box through the signal harness. The multiple signal harnesses are adapted to the arrangement structure of the multiple battery modules, reducing wiring clutter.

[0010] In one or more of the above optional embodiments, the cabinet includes a front wall and a rear wall disposed opposite each other along a third direction, the front wall being configured to be openable. A first electrical connection terminal and a second electrical connection terminal face the front wall, and the first, second, and third directions are perpendicular to each other. This facilitates operation and inspection of the first and second electrical connection terminals when the energy storage device is in the open state.

[0011] In one or more of the above optional embodiments, the energy storage device includes an enclosure fixed to a cabinet. The enclosure covers an electrical device along a third direction and includes a first opening, with the third direction perpendicular to the first direction. The electrical device includes a connector, which is located within the first opening when viewed along the third direction. The enclosure serves to isolate and protect the electrical device, reducing direct contact between high-temperature and high-pressure substances and the electrical device, thus lowering the risk of damage to the electrical device from high-temperature environments and improving the reliability of the energy storage device. Furthermore, the enclosure can conceal a large area of ​​clear space. By providing a connector, contact with the electrical device is reduced, improving safety performance; moreover, retaining exposed terminals on the connector facilitates wiring.

[0012] In one or more of the above optional embodiments, the cabinet includes a first sidewall and a second sidewall spaced apart along a first direction, and the first sidewall includes a second opening. The energy storage device includes a power conversion unit and a second conductive element. The power conversion unit is fixed to the outside of the first sidewall, and the second conductive element passes through the second opening to connect the power conversion unit and a connector. Fixing the power conversion unit to the outside of the first sidewall reduces the space occupied inside the cabinet and allows for direct operation and maintenance of the power conversion unit. The second conductive element connects the power conversion unit and the electrical device through the second opening, shortening the transmission path of the second conductive element and reducing line impedance and energy loss.

[0013] In one or more of the above optional embodiments, the cabinet includes two first beams spaced apart along a third direction, two second beams spaced apart along a third direction, and two third beams spaced apart along a third direction. The two first beams separate a portion of a first cavity and a portion of a second cavity. Along a first direction, the first cavity and the second cavity are located between the second and third beams, and the first direction is perpendicular to the third direction. The battery module includes a module body, a first fixing part, and a second fixing part. In the first direction, the first fixing part and the second fixing part are connected to opposite sides of the module body. The first fixing part is fixed to the first beam, and the second fixing part is fixed to the third beam. Multiple electrical devices are fixed to the first beam and the second beam. The battery module is fixed to the first beam and the third beam respectively by the first fixing part and the second fixing part to improve the connection stability of the battery module.

[0014] In one or more of the above optional embodiments, the multiple electrical devices include at least one of the following: a high-voltage box, an energy information management unit and a switch, an uninterruptible power supply, an auxiliary power supply and power distribution, a positive interface and a negative interface, a communication network port, and an AC interface. The battery module is fixed to the first beam and the third beam respectively by the first fixing part and the second fixing part to improve the connection stability of the battery module. Attached Figure Description

[0015] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0016] Figure 1 Schematic diagrams of the closed state of the energy storage device provided in some embodiments of this application;

[0017] Figure 2 This is a partial structural schematic diagram of the cabinet of an energy storage device provided in some embodiments of this application;

[0018] Figure 3 Schematic diagrams of the energy storage device in its open state provided in some embodiments of this application;

[0019] Figure 4 A partial front view of an energy storage device provided for some embodiments of this application;

[0020] Figure 5 This is a schematic diagram of the structure of a battery module for an energy storage device provided in some embodiments of this application;

[0021] Figure 6 Schematic diagram of the package of an energy storage device provided in some embodiments of this application;

[0022] Figure 7 This is a schematic diagram of the high-voltage box structure provided for some embodiments of this application.

[0023] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0024] 1. Energy storage device; 10. Cabinet; 10a. First cavity; 10b. Second cavity; 11. Top wall; 12. Bottom wall; 13. Front wall; 14. Rear wall; 15. First side wall; 151. Second opening; 16. Second side wall; 17. First beam; 17a. First front beam; 17b. First rear beam; 18. Second beam; 18a. Second front beam; 18b. Second rear beam; 19. Third beam; 19a. Third front beam; 19b. Third rear beam; 20. Electrical equipment; 21. High-voltage box; 22. Connector; 30. Battery module; 31. First electrical connection terminal; 32. Second electrical connection terminal; 33. Module body; 34. First fixing part; 35. Second fixing part; 40. First conductive element; 40a. Converging part; 41. First wiring harness; 42. First wiring harness; 50. Encapsulation component; 51. First opening; 60. Power conversion unit; 70. Second conductive element; 80. Signal wiring harness; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0026] The terms "first," "second," "third," etc., used in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0027] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0028] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 85°-95°, the two directions can be considered perpendicular; if the angle between two directions is 0°-10°, the two directions can be considered parallel.

[0030] The energy storage device of this application is described below with reference to the accompanying drawings.

[0031] Reference Figure 1 and 2 This application provides an energy storage device 1, which includes a cabinet 10. The cabinet 10 includes a first cavity 10a and a second cavity 10b arranged along a first direction Z.

[0032] The cabinet 10 has a first cavity 10a and a second cavity 10b arranged along a first direction Z, where the first direction Z is the direction from the first cavity 10a to the second cavity 10b.

[0033] Optionally, the first direction Z is parallel to the horizontal direction, the first cavity 10a is located on the left side, and the second cavity 10b is located on the right side.

[0034] The first cavity 10a is used to house the electrical device 20, which, exemplarily, includes components such as electrical elements.

[0035] In some examples, the first cavity 10a is a closed space or an open space.

[0036] In some examples, the second cavity 10b is either a closed space or an open space.

[0037] In some examples, the structure of the first cavity 10a is the same as that of the second cavity 10b; alternatively, the structure of the first cavity 10a is different from that of the second cavity 10b.

[0038] The energy storage device 1 includes a plurality of electrical devices 20, which are disposed in the first cavity 10a.

[0039] Please see Figure 3 Multiple electrical devices 20 are disposed in the first cavity 10a along a second direction Y, which is perpendicular to the first direction Z. Optionally, the second direction Y is parallel to the vertical direction, and the multiple electrical devices 20 are stacked along the second direction Y.

[0040] In other examples, multiple electrical devices 20 are disposed in the first cavity 10a along the first direction Z.

[0041] In some embodiments, the electrical device 20 is configured to control the charging and discharging of the battery module 30.

[0042] The energy storage device 1 includes multiple battery modules 30, which are disposed in the second cavity 10b.

[0043] In some examples, the electrical device 20 is spaced apart from the battery module 30 along the first direction Z.

[0044] In some examples, the battery module 30 includes a housing and battery cells, with the housing having an internal storage space in which the battery cells are housed.

[0045] Please see Figure 3 Multiple battery modules 30 are disposed in the second cavity 10b along the second direction Y, which is perpendicular to the first direction Z. Optionally, the multiple battery modules 30 are stacked along the second direction Y.

[0046] In other examples, multiple battery modules 30 are disposed in the second cavity 10b along the first direction Z.

[0047] In some examples, multiple battery modules 30 are electrically connected in series, parallel, or a mixed connection. A mixed connection means that some of the multiple battery modules 30 are connected in series and others in parallel. In this application, the example of multiple battery modules 30 connected in series is used for illustration.

[0048] Please see Figure 3 The energy storage device 1 includes a first conductive element 40, which is connected to at least one electrical device 20 and at least one battery module 30.

[0049] In some examples, the first conductive element 40 is connected to an electrical device 20 and a battery module 30.

[0050] In other examples, the first conductive element 40 is connected to an electrical device 20 and multiple battery modules 30.

[0051] For example, multiple battery modules 30 are connected in series, parallel, or mixed to form a whole, and are connected to the electrical device 20 through the first conductive element 40.

[0052] In some examples, the first conductive element 40 connects multiple electrical devices 20 and multiple battery modules 30. Exemplarily, a portion of the first conductive element 40 is located within a first cavity 10a, and another portion is located within a second cavity 10b.

[0053] In some examples, the first conductive element 40 includes a wire harness. Optionally, the first conductive element 40 includes a sampling line. Optionally, the first conductive element 40 includes a power line.

[0054] The energy storage device 1 provided in this application places multiple electrical devices 20 and multiple battery modules 30 in different chambers, reducing the impact of potential thermal runaway, short circuits, leakage, and other faults in the battery modules 30 on the electrical devices 20, thereby improving the reliability and safety of the energy storage device 1. The electrical devices 20 and battery modules 30 are placed in independent chambers with functional partitioning, facilitating debugging, replacement, and maintenance. Furthermore, the internal chamber design of the cabinet 10 allows for flexible layout planning based on the number and specifications of the electrical devices 20 and battery modules 30, reducing space waste in mixed-use configurations.

[0055] Please see Figure 3 and Figure 5 Multiple battery modules 30 are arranged along the second direction Y. Each battery module 30 includes a first electrical connection terminal 31 and a second electrical connection terminal 32. The polarities of the first electrical connection terminal 31 and the second electrical connection terminal 32 are opposite. The second direction Y is perpendicular to the first direction Z.

[0056] Please see Figure 3 The first electrical connection terminal 31 of the uppermost battery module 30 serves as the first common terminal of the multiple battery modules 30, which is one of the positive and negative terminals of the multiple battery modules 30. The electrical device 20 includes a high-voltage box 21. The first conductive element 40 includes a first wiring harness 41, which is connected to the first common terminal and extends through the second cavity 10b into the first cavity 10a to connect with the high-voltage box 21. The wiring of the first conductive element 40 is concealed within the cavity, optimizing the wiring path of the first conductive element 40. Furthermore, it provides a certain degree of protection for the first conductive element 40.

[0057] For example, the first wiring harness 41 includes a first segment (not shown) and a second segment (not shown). The first segment is disposed in the second cavity 10b and connected to the first main terminal. The second segment is disposed in the first cavity 10a and connects the first segment to the high-voltage box 21.

[0058] Please see Figure 3 Multiple first electrical connection terminals 31 of multiple battery modules 30 are spaced apart along the second direction Y, and multiple second electrical connection terminals 32 of multiple battery modules 30 are spaced apart along the second direction Y.

[0059] In other examples, multiple first electrical connection terminals 31 and multiple second electrical connection terminals 32 of multiple battery modules 30 are arranged alternately along the second direction Y.

[0060] Please see Figure 3 The second electrical connection terminal 32 of the bottommost battery module 30 serves as the second common terminal of the multiple battery modules 30, which is either the positive or negative terminal of the multiple battery modules 30. The first conductive element 40 includes a second wire harness 42, which is connected to the second common terminal and extends through the second cavity 10b into the first cavity 10a to connect with the high voltage box 21.

[0061] For example, please refer to Figure 3 The first electrical connection terminal 31 of the uppermost battery module 30 is the first common terminal of the multiple battery modules 30, and the first common terminal is the positive terminal of the multiple battery modules 30. The second electrical connection terminal 32 of the lowermost battery module 30 is the second common terminal of the multiple battery modules 30, and the second common terminal is the negative terminal of the multiple battery modules 30. The first conductive component 40 includes a first wiring harness 41 and a second wiring harness 42. The first wiring harness 41 connects the high-voltage box 21 and the first common terminal, and the second wiring harness 42 connects the high-voltage box 21 and the second common terminal.

[0062] For example, the second wiring harness 42 includes a third segment (not shown) and a fourth segment (not shown). The third segment is disposed in the second cavity 10b and connected to the second main terminal. The fourth segment is disposed in the first cavity 10a and connects the third segment to the high-voltage box 21.

[0063] In some examples, a portion of the second harness 42 is located on the same side as the first harness 41.

[0064] The positive or negative terminals of multiple battery modules 30 are located at both ends and are electrically connected to the high-voltage box 21 via the first wiring harness 41 and the second wiring harness 42, respectively. This optimizes the connection method of the first conductive component 40 and reduces the error rate of wiring. Moreover, with the positive and negative terminals located at both ends, a portion of the first conductive component 40 can be wired in a straight line, reducing resistance loss caused by bending and tangling.

[0065] Please see Figure 3 A portion of the second wiring harness 42 is fixed to the first wiring harness 41 and forms a collection portion 40a. The cabinet 10 includes a top wall 11 and a bottom wall 12 disposed opposite each other along the second direction Y, and a portion of the collection portion 40a is accommodated between the top wall 11 and the uppermost battery module 30.

[0066] In some examples, there is a first gap between the top wall 11 and the battery module 30, and a portion of the collection portion 40a is accommodated within the first gap.

[0067] In some examples, there is a second gap between the top wall 11 and the high-voltage box 21, and a portion of the collection section 40a is accommodated within the second gap.

[0068] By planning the wiring path of the first conductive component 40 and concealing part of the first conductive component 40, the direct contact between high-temperature and high-pressure materials and the first conductive component 40 can be effectively reduced, thereby improving the protective performance and service life of the first conductive component 40.

[0069] The energy storage device 1 includes multiple signal harnesses 80. The signal connection terminals 36 between adjacent battery modules 30 are connected through the signal harnesses 80. The signal connection terminal 36 of the uppermost battery module 30 is connected to the high-voltage box 21 through the signal harnesses 80. The multiple signal harnesses 80 are adapted to the arrangement structure of the multiple battery modules 30, reducing wiring chaos.

[0070] In some examples, the signal connection terminals 36 of multiple battery modules 30 are arranged along the second direction Y, and the signal connection terminals 36 between multiple adjacent battery modules 30 are spaced apart along the second direction Y.

[0071] In some examples, the signal harness 80 of the uppermost battery module 30 includes a fifth segment (not shown) and a sixth segment (not shown). The fifth segment is located in the second cavity 10b and connected to the signal connection terminal 36. The sixth segment is located in the first cavity 10a and connects the fifth segment to the high-voltage box 21.

[0072] Please see Figure 3 In some embodiments, the cabinet 10 includes a front wall 13 and a rear wall 14 disposed opposite each other along a third direction X. The front wall 13 is configured to be openable. The cabinet 10 has a closed state and an open state, and the cabinet 10 can switch between the closed state and the open state by controlling the front wall 13.

[0073] The first electrical connection terminal 31 faces the front wall 13, and the second electrical connection terminal 32 faces the front wall 13. The first direction Z, the second direction Y, and the third direction X are perpendicular to each other. When the energy storage device 1 is in the open state, it is convenient to operate and inspect the first electrical connection terminal 31 and the second electrical connection terminal 32.

[0074] Please see Figure 4 , Figure 5 and Figure 6 The energy storage device 1 includes a package 50 fixed to the cabinet 10, which covers at least a portion of the electrical device 20 along a third direction X. The package 50 includes a first opening 51, with the third direction X perpendicular to the first direction Z. The electrical device 20 includes a connector 22; please refer to [reference needed]. Figure 3 and Figure 4Viewed along a third direction X, connector 22 is located within the first opening 51. Connector 22 is configured to connect to a component outside the first cavity 10a.

[0075] In some embodiments, the package 50 is generally plate-shaped and covers at least a portion of the electrical device 20 along a third direction X.

[0076] The encapsulation 50 is made of a material with good thermal insulation properties to reduce heat transfer to the electrical device 20, thereby improving the safety and reliability of the electrical device 20.

[0077] In some embodiments, the encapsulation component 50 is fixed to the cabinet 10, and the fixing method includes screw connection, snap-fit, welding, bonding, adhesive bonding, connection of connecting components, etc.

[0078] In some embodiments, at least a portion of the package 50 extends along a first direction Z.

[0079] The battery module 30 is closer to the front wall 13 than the package 50. The battery module 30 protrudes from the package 50, making full use of the space in the third direction X of the cabinet 10 to increase the energy density of the battery module 30. The protrusion of the battery module 30 from the package 50 facilitates the rapid flow of high-temperature and high-pressure materials from the second cavity 10b to the first cavity 10a, thereby enabling rapid discharge from the cabinet 10.

[0080] The encapsulation 50 serves as an isolation and protection element, reducing direct contact between high-temperature and high-pressure materials and the electrical device 20, thereby lowering the risk of damage to the electrical device 20 from the high-temperature environment and improving the reliability of the energy storage device 1. Furthermore, the encapsulation 50 can conceal a large area of ​​clear space. By providing the connector 22, contact with the electrical device 20 is reduced, improving safety performance; moreover, the exposed terminals of the connector 22 are retained for easy wiring.

[0081] Please see Figure 1 The cabinet 10 includes a first sidewall 15 and a second sidewall 16 spaced apart along a first direction Z. The first sidewall 15 includes a second opening 151. The energy storage device 1 includes a power conversion unit 60 and a second conductive element 70. The power conversion unit 60 is fixed to the outside of the first sidewall 15, and the second conductive element 70 passes through the second opening 151 to connect the power conversion unit 60 and the connector 22.

[0082] The first sidewall 15 has an outer side and an inner side in the first direction Z, the power conversion unit 60 is located on the outer side and fixed on the outer side, and a plurality of electrical devices 20 are located on the inner side.

[0083] In some examples, the first sidewall 15 is connected to the top wall 11, the bottom wall 12, and the rear wall 14. The second sidewall 16 is connected to the top wall 11, the bottom wall 12, and the rear wall 14. The first sidewall 15, the second sidewall 16, the top wall 11, and the bottom wall 12 form a third opening, which is covered by the front wall 13.

[0084] Optionally, the cabinet 10 includes a connecting shaft, and the front wall 13 is rotatably connected to the second side wall 16 via the connecting shaft.

[0085] Optionally, the first electrical connection terminal 31 and the second electrical connection terminal 32 of the battery module 30 are exposed to the third opening.

[0086] For example, when the energy storage device 1 changes from a closed state to an open state, the end of the front wall 13 away from the connecting shaft rotates away from the first side wall 15. This facilitates the operator's operation of components such as the battery module 30 and the electrical device 20.

[0087] In some examples, in the first direction Z, the first cavity 10a and the second cavity 10b are located between the first sidewall 15 and the second sidewall 16.

[0088] In some examples, the first sidewall 15 has a second opening 151 extending along a first direction Z, the second opening 151 being located at the bottom of the first sidewall 15 along a third direction X. The second opening 151 connects the first cavity 10a and the outside of the cabinet 10.

[0089] For example, a portion of the second conductive element 70 is located inside the first cavity 10a, and another portion is located outside the cabinet 10.

[0090] In some examples, the second conductive element 70 includes a wire.

[0091] Optionally, the energy storage device 1 includes a sealing ring disposed at the first opening 51.

[0092] The power conversion unit 60 is fixed to the outside of the first side wall 15, reducing the space occupied inside the cabinet 10, and allowing direct operation and maintenance of the power conversion unit 60. The second conductive element 70 connects the power conversion unit 60 and the electrical device 20 through the second opening 151, shortening the transmission path of the second conductive element 70 and reducing line impedance and energy loss.

[0093] Please see Figure 2 The cabinet 10 includes two first beams 17, two second beams 18 and two third beams 19 spaced apart along a third direction X. The two first beams 17 separate a portion of the first cavity 10a and a portion of the second cavity 10b. Along a first direction Z, the first cavity 10a and the second cavity 10b are located between the second beams 18 and the third beams 19. The first direction Z is perpendicular to the third direction X.

[0094] Please see Figure 2 The two first beams 17 are a first front beam 17a and a first rear beam 17b, which are spaced apart along a third direction X. Both the first front beam 17a and the first rear beam 17b connect and fix the top wall 11 and the bottom wall 12.

[0095] The two second beams 18 are the second front beam 18a and the second rear beam 18b, respectively, and are spaced apart along the third direction X.

[0096] In some embodiments, the first front beam 17a and the first rear beam 17b separate a portion of the first cavity 10a and a portion of the second cavity 10b.

[0097] Please see Figure 2 The two third beams 19 include a third front beam 19a and a third rear beam 19b, which are spaced apart along a third direction X. Both the third front beam 19a and the third rear beam 19b connect and fix the top wall 11 and the bottom wall 12.

[0098] Please see Figure 5 The battery module 30 includes a module body 33, a first fixing part 34 and a second fixing part 35. Along the first direction Z, the first fixing part 34 and the second fixing part 35 are connected to opposite sides of the module body 33. The first fixing part 34 is fixed to the first front beam 17a and the second fixing part 35 is fixed to the third front beam 19a.

[0099] Optionally, the first fixing part 34 is detachably connected to the module body 33. The second fixing part 35 is detachably connected to the module body 33.

[0100] Optionally, the first fixing part 34 is L-shaped.

[0101] Optionally, the first fixing part 34 is provided with a first connecting hole, and the energy storage device 1 includes a first screw, which is fixed to the first beam 17 through the first connecting hole.

[0102] Optionally, the second fixing part 35 is L-shaped.

[0103] Optionally, the second fixing part 35 is provided with a second connecting hole, and the energy storage device 1 includes a second screw, which is fixed to the third beam 19 through the second connecting hole.

[0104] In some embodiments, each electrical device 20 is fixed to the first beam 17 and the second beam 18, respectively.

[0105] Please see Figure 7Multiple electrical devices 20 include at least one of the following: high-voltage box 21, energy information management unit and switch (not shown), uninterruptible power supply (not shown), auxiliary power supply and power distribution (not shown), positive and negative interfaces (not shown), communication network port (not shown), and AC interface (not shown).

[0106] For example, along the third direction X, there are in sequence a high-voltage box 21, an energy information management unit and switch 22, an uninterruptible power supply 23, an auxiliary power supply and power distribution 24, a positive interface and a negative interface 25, and an AC interface 27.

[0107] In some embodiments, the first cavity 10a includes a plurality of sub-cavities disposed along a second direction Y, each sub-cavity accommodating at least one electrical device 20.

[0108] For example, the multiple sub-cavities include a first sub-cavity, a second sub-cavity, a third sub-cavity, and a fourth sub-cavity arranged along the second direction Y. The first sub-cavity is used to house the high-voltage box 21, the second sub-cavity is used to house the energy information management unit and the switch 22 as well as the uninterruptible power supply 23, the third sub-cavity is used to house the auxiliary power supply and the power distribution 24, and the fourth sub-cavity is used to house the positive and negative interfaces 25, the communication network port 26, and the AC interface 27.

[0109] The first cavity 10a integrates multiple electrical devices 20 together, saving installation space for the electrical devices 20, simplifying the layout of the electrical devices 20, and facilitating the installation, commissioning and maintenance of multiple electrical devices 20.

[0110] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: The cabinet includes a first cavity and a second cavity arranged along a first direction. The cabinet also includes two first beams spaced apart along a third direction, two second beams spaced apart along the third direction, and two third beams spaced apart along the third direction. The two first beams separate a portion of the first cavity and a portion of the second cavity. Along the first direction, the first cavity and the second cavity are located between the second beams and the third beams. The first direction is perpendicular to the third direction. Multiple electrical devices are disposed in the first cavity and fixed to the first beam and the second beam, and the electrical devices include a high-voltage box; Multiple battery modules are disposed in the second cavity and arranged along a second direction. Each battery module includes a first electrical connection terminal and a second electrical connection terminal with opposite polarities. The first electrical connection terminal of the uppermost battery module serves as the first common terminal of the multiple battery modules. The second direction is perpendicular to the first direction. Each battery module includes a module body, a first fixing part, and a second fixing part. Along the first direction, the first fixing part and the second fixing part are connected to opposite sides of the module body. The first fixing part is fixed to the first beam, and the second fixing part is fixed to the third beam. A first conductive element connects at least one of the electrical devices and at least one of the battery modules. The first conductive element includes a first wire harness connected to the first main terminal and extending through the second cavity into the first cavity to connect with the high-voltage box.

2. The energy storage device according to claim 1, characterized in that, The second electrical connection terminal of the bottommost battery module serves as the second common terminal of the plurality of battery modules; The first conductive element includes a second wire harness, which is connected to the second main terminal and extends through the second cavity into the first cavity to connect with the high-voltage box.

3. The energy storage device according to claim 2, characterized in that, A portion of the second wire harness is fixed to the first wire harness and forms a convergence section; The cabinet includes a top wall and a bottom wall disposed opposite each other along the second direction, and a portion of the collection section is accommodated between the top wall and the uppermost battery module.

4. The energy storage device according to claim 1, characterized in that, The energy storage device includes multiple signal harnesses, and the signal connection terminals between adjacent battery modules are connected through the signal harnesses. The signal connection terminal of the uppermost battery module is connected to the high-voltage box through the signal harnesses.

5. The energy storage device according to claim 1, characterized in that, The cabinet includes a front wall and a rear wall disposed opposite each other along a third direction, the front wall being configured to be openable; The first electrical connection terminal and the second electrical connection terminal face the front wall, and the first direction, the second direction and the third direction are perpendicular to each other.

6. The energy storage device according to claim 1, characterized in that, The energy storage device includes an encapsulation component, which is fixed to the cabinet and covers the electrical device along a third direction. The encapsulation component includes a first opening, and the third direction is perpendicular to the first direction. The electrical device includes a connector, which, when viewed along the third direction, is located within the first opening.

7. The energy storage device according to claim 6, characterized in that, The cabinet includes a first sidewall and a second sidewall spaced apart along the first direction, and the first sidewall includes a second opening; The energy storage device includes a power conversion unit and a second conductive element. The power conversion unit is fixed to the outside of the first sidewall, and the second conductive element passes through the second opening to connect the power conversion unit and the connector.

8. The energy storage device according to any one of claims 1-7, characterized in that, The plurality of electrical devices include at least one of the following: high-voltage box, energy information management unit and switch, uninterruptible power supply, auxiliary power supply and power distribution, positive and negative interface, communication network port, and AC interface.

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