Energy storage device, energy storage frame and energy storage system

Abstract

The invention relates to an energy storage device, an energy storage frame and an energy storage system, the energy storage device comprises the energy storage frame and an electric cabinet, and the energy storage frame comprises a frame and a power conduction assembly. The electric power conduction assembly and the electric cabinet are arranged on the frame, the electric power conduction assembly comprises at least two connecting busbars, and the connecting busbars extend in the first direction and are arranged side by side at intervals in the second direction intersecting with the first direction. Part of the connecting busbars are used as positive electrode connecting busbars and are electrically connected with the positive electrodes of at least part of the electric cabinets. Part of the connecting busbars serve as cathode connecting busbars and are electrically connected with the cathodes of at least part of the electric cabinets. In the technical scheme of the embodiment of the invention, the electric cabinet is communicated with the external circuit through the connecting busbars which are arranged side by side, and the connecting busbars are arranged at intervals, so that the electrodynamic force between the adjacent connecting busbars is weakened, the risk of short circuit between the connecting busbars is reduced, and the operation reliability of the energy storage device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage equipment, and in particular to an energy storage device, an energy storage rack and an energy storage system. Background Art

[0002] The new power system based on new energy is becoming an important choice for sustainable energy development. With the rapid development of new energy technology, the application of energy storage system is becoming more and more extensive.

[0003] An energy storage system is usually composed of multiple energy storage devices connected in series or in parallel. Each energy storage device is composed of a power module composed of a voltage source inverter and an electrical cabinet containing a battery. Power is usually transmitted between the power module and the electrical cabinet via a power conduction component. How to improve the reliability of power conduction between the power module and the electrical cabinet is one of the technical problems that technicians in this field need to solve. Summary of the invention

[0004] In view of the above problems, the present application provides an energy storage device, an energy storage rack and an energy storage system, which can improve the reliability of power conduction between the power module and the electrical cabinet, thereby improving the reliability of the energy storage system.

[0005] In the first aspect, the present application provides an energy storage device, including an energy storage rack and an electric cabinet, wherein the energy storage rack includes a frame and a power conduction component. The power conduction component and the electric cabinet are both arranged on the frame, which includes at least two connecting busbars, each connecting busbar extending along a first direction, and arranged side by side and spaced apart from each other along a second direction intersecting the first direction. Some of the connecting busbars serve as positive connecting busbars, and the positive connecting busbars are electrically connected to the positive poles of at least some of the electric cabinets. Some of the connecting busbars serve as negative connecting busbars, and the negative connecting busbars are electrically connected to the negative poles of at least some of the electric cabinets.

[0006] In the technical solution of the embodiment of the present application, the electric cabinet is connected to the external circuit through connecting busbars arranged side by side. The connecting busbars are arranged at intervals, thereby weakening the electric force between adjacent connecting busbars, reducing the risk of short circuit between the connecting busbars, and helping to improve the operating reliability of the energy storage device.

[0007] In some embodiments, the size of at least one connecting busbar in the second direction is smaller than its size in the third direction, and the first direction, the second direction and the third direction are arranged to intersect each other. Since the connecting busbars are arranged at intervals in the second direction, when the size of the connecting busbar in the second direction is smaller than its size in the third direction, it helps to increase the spacing between adjacent connecting busbars, reduce the electric force between adjacent connecting busbars, and improve the operating reliability of the energy storage device.

[0008] In some embodiments, there are multiple electric cabinets, all of which are arranged side by side along the second direction, and each row of electric cabinets includes at least one electric cabinet. The positive poles of the electric cabinets in the same row are electrically connected to the same positive pole connection busbar, and the negative poles of the electric cabinets in the same row are electrically connected to the same negative pole connection busbar. At this time, a group of connecting busbars is arranged corresponding to a row of electric cabinets, and the positive pole connection busbars in the group of connecting busbars are used to electrically connect all the positive poles of the row of electric cabinets, and the negative pole connection busbars in the group of connecting busbars are used to connect all the negative poles of the row of electric cabinets. The power conduction of each row of electric cabinets is arranged separately, which is more conducive to the design of the power conduction scheme and the layout of the connecting busbars, and each row of electric cabinets can be closer to the corresponding connecting busbar, which helps to reduce the length of the positive and negative poles, thereby reducing costs.

[0009] In some embodiments, in at least two adjacently arranged groups of connecting busbars, the positive connecting busbars and the negative connecting busbars are all arranged in parallel or in series. When the parallel shunting arrangement is adopted, the current size of the branch corresponding to each positive connecting busbar / negative connecting busbar can be reduced. The smaller the current, the smaller the electric force generated between the positive connecting busbar and the negative connecting busbar, which helps to reduce the electric force received by the connecting busbar, thereby improving the reliability of the power conduction component. When the positive connecting busbars are arranged in series, and the negative connecting busbars are arranged in series, the positive current shunted from the positive connecting busbar to each electric cabinet is basically the same, and the current size from each negative electrode to the negative connecting busbar is basically the same, so that the difference in inductance and resistance of the branch where each electric cabinet is located can be smaller, which helps to reduce the uneven flow of each electric cabinet.

[0010] In some embodiments, there are two groups of adjacently arranged connection busbars, and in the second direction, at least two negative connection busbars are arranged adjacently, or at least two positive connection busbars are arranged adjacently. In this way, when arranging the negative connection busbars and the positive connection busbars, the probability of the two being staggered can be reduced, which helps to reduce the probability of the two being in short-circuit contact, thereby improving the reliability of the power conduction component.

[0011] In some embodiments, the power conduction component further includes a positive transition busbar, and two positive connection busbars arranged in parallel or in series are electrically connected via the positive transition busbar. And / or, the power conduction component further includes a negative transition busbar, and two negative connection busbars arranged in parallel or in series are electrically connected via the negative transition busbar. The positive transition busbar and the negative transition busbar in the form of busbars are used to respectively realize the electrical connection between the positive connection busbar and the negative connection busbar. The busbar has better resistance to the action of electric force and less deformation, which helps to improve the reliability of the power conduction component.

[0012] In some embodiments, in at least one row of electrical cabinets, the positive poles of some electrical cabinets are electrically connected to the positive transition busbar, and / or the negative poles of some electrical cabinets are electrically connected to the negative transition busbar. In this case, the positive transition busbar and the negative transition busbar are further used for current shunting and current converging, which improves the utilization rate of both, helps to reduce the busbar length of the power conduction component, and reduces the cost.

[0013] In some embodiments, the positive electrode and the negative electrode are located at one end of the electric cabinet in the third direction close to the power conduction component, and the positive electrode and / or the negative electrode are cable components. The positive electrode and the negative electrode are prepared by using cables. Since the cables have strong deformability, when the cables are connected, the shape of the cables can be flexibly changed to adapt to the positional relationship between the electric cabinet and the connecting busbar or the transition busbar. The electrical connection operation between the positive electrode / negative electrode and the power conduction component is easier to achieve, and the cable price is lower, which can reduce costs.

[0014] In some embodiments, the electric cabinets are arranged in multiple rows, each row of electric cabinets includes multiple electric cabinets arranged in sequence in the first direction, and in at least one row of electric cabinets, the positive electrodes of each electric cabinet are located on the same side of the negative electrodes in the second direction. When the arrangement orientations of the positive electrodes and the negative electrodes in the same row of electric cabinets in the second direction are the same, it helps to make the positive electrode length and the negative electrode length in the branch where each electric cabinet is located basically consistent, and helps to make the inductance and resistance values ​​of the branch where the electric cabinet is located basically consistent, thereby reducing the uneven flow of each electric cabinet.

[0015] In some embodiments, the energy storage device further includes a junction box and a power module, the junction box is electrically connected to the power module, and is electrically connected to the electric cabinet via a power conduction component. The positions and shapes of most modules other than the power module and the electric cabinet are integrated by the junction box. When the junction box, the electric cabinet and the power module are arranged in the frame, the layout can be more convenient, and the spacing between them is smaller, making the overall structure of the energy storage device more compact.

[0016] In some embodiments, the power conduction component further includes a positive busbar and a negative busbar, at least part of the positive connection busbar is electrically connected to the combiner cabinet via the positive busbar, and at least part of the negative connection busbar is electrically connected to the combiner cabinet via the negative busbar. The arrangement of the positive busbar and the negative busbar facilitates the connection between the combiner cabinet and the power conduction component, and both have high strength and strong deformation resistance, which helps to improve the reliability of the power conduction component.

[0017] In some embodiments, in the second direction, the spacing distance between adjacent connected busbars is L1, and the selected value of L1 is 100 mm to 450 mm. At this time, the electric force between adjacent connected busbars is small, and the layout of the power conduction components in the second direction is also relatively compact.

[0018] In some embodiments, in the second direction, each connecting busbar is spaced apart from the frame. The spaced arrangement of the connecting busbar and the frame can reduce the risk of electrical leakage of the frame.

[0019] In the second aspect, the present application provides an energy storage rack, including a frame and a power conduction component, wherein the frame is formed with a first accommodation area for accommodating an electric cabinet, and the power conduction component includes at least two connecting busbars, each connecting busbar is extended along a first direction, and all the connecting busbars are arranged side by side and spaced along a second direction. The connecting busbars are arranged on one side of the first accommodation area in the third direction, and the first direction, the second direction and the third direction are arranged to intersect each other.

[0020] When the energy storage rack is applied to an energy storage device, the connecting busbars arranged side by side in the second direction are electrically connected to the electric cabinet, and the connecting busbars are arranged at intervals, thereby weakening the electric force between adjacent connecting busbars, reducing the risk of short circuit between the connecting busbars, and helping to improve the operating reliability of the energy storage device.

[0021] In some embodiments, the frame includes a plurality of first accommodating areas, the plurality of first accommodating areas are arranged side by side along the second direction, the power conduction assembly includes a plurality of groups of connecting busbars, each group of connecting busbars includes at least two connecting busbars, and the plurality of groups of connecting busbars are arranged sequentially in the second direction. A group of connecting busbars is arranged on one side of at least one row of first accommodating areas in the third direction. At this time, at least part of the positive poles of the electric cabinets accommodated in each row of the first accommodating areas can be electrically connected to the same positive pole connecting busbar, and at least part of the negative poles can be electrically connected to the same negative pole connecting busbar, so that the electric cabinets are more convenient to connect to electricity, and the error rate can be reduced.

[0022] In some embodiments, each group of connecting busbars includes positive connecting busbars and negative connecting busbars, and in at least two adjacent groups of connecting busbars, the positive connecting busbars and the negative connecting busbars are arranged in parallel or in series.

[0023] When the positive connection busbars are connected in parallel, the amount of current flowing through each positive busbar is related to the number of electric cabinets connected to it. Moreover, when the positive connection busbars and the negative connection busbars are connected in parallel, the total current is divided, and the amount of current flowing in each is smaller, which can reduce the electric force.

[0024] When the negative connection busbars and the positive connection busbars are arranged in series, the current on each negative connection busbar and each positive connection busbar is basically the same, which helps to make the current of the branch circuits of the power cabinet consistent and reduce uneven current.

[0025] In some embodiments, the frame is further formed with a second accommodating area and a third accommodating area, which are arranged in sequence in the third direction and staggered with the plurality of first accommodating areas in a plane perpendicular to the third direction. In this case, the energy storage rack can accommodate power modules and combiner cabinets, with a higher degree of integration.

[0026] In some embodiments, the energy storage rack further includes an insulating support, and at least part of the connecting busbars are supported on the frame via the insulating support. The insulating support supports the connecting busbars and the frame, so that a certain air clearance and creepage distance can be reserved between the connecting busbars and the frame, thereby reducing the risk of frame leakage.

[0027] In some embodiments, at least part of the connecting busbar is clamped on the insulating support. The clamping method facilitates the installation of the connecting busbar and can be achieved without the help of installation tools.

[0028] In some embodiments, the insulating support includes an insulator, a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are spaced apart to form a clamping space, and are jointly arranged at one end of the insulator in the third direction, and the other end of the insulator in the third direction is arranged on the frame. In this case, the connecting busbar or the transition busbar is clamped by the clamping space formed by the first fixing plate and the second fixing plate, and the connecting busbar and the transition busbar are easy to install and can be clamped reliably.

[0029] In some embodiments, the energy storage rack further includes a flange structure, which is disposed at both ends of the frame in the third direction and protrudes out of the frame. In this case, flange structures are disposed at both ends of the frame in the third direction, so that the energy storage devices can be stacked, and sufficient space for installing power conduction components is reserved between the frames of the energy storage devices on both sides of the adjacent sides in the third direction, which can reduce the risk of frame leakage.

[0030] In a third aspect, the present application provides an energy storage system, which includes the energy storage device in the above embodiment.

[0031] In some embodiments, the energy storage device comprises multiple energy storage devices, and the multiple energy storage devices are stacked in the third direction. In this case, multiple energy storage devices are stacked in the third direction to form an energy storage system, and the energy storage system can freely combine the energy storage devices according to system requirements, and has a high degree of scalability.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0034] Figure 1 It is a schematic diagram of the structure of the energy storage device in one or more embodiments of the present application.

[0035] Figure 2 It is a schematic diagram of the structure of an energy storage device in one or more other embodiments of the present application.

[0036] Figure 3 Schematic diagram of electrical connections of an energy storage device in one or more embodiments of the present application.

[0037] Figure 4 It is a schematic diagram of the structure of the insulating support member in one or more embodiments of the present application.

[0038] The reference numerals in the specific implementation manner are as follows:

[0039] 100. Energy storage device; 10. Energy storage rack; X, first direction; Y, second direction; Z, third direction; 11. Frame; 11a. Crossbeam; 11b. Longitudinal beam; Q1, first accommodating area; Q2, second accommodating area; Q3, third accommodating area; 12. Power conduction component; 12a. Connecting busbar; a1, positive connecting busbar; a2, negative connecting busbar; 12b, positive transition busbar; 12c, negative transition busbar; 12d, positive busbar; 12e, negative busbar; 13. Flange structure; 14. Insulating support; 14f. Insulator; 14g, first fixing plate; 14h, second fixing plate; 20. Electric cabinet; 21. Positive pole; 22. Negative pole; 30. Busbar; 40. Power module. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the description of the embodiments of the present application, if technical terms such as "first" and "second" appear, they are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0043] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] In the description of the embodiments of the present application, if the term "and / or" appears, it is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, if it appears, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0045] In the description of the embodiments of the present application, if it appears, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0046] In the description of the embodiments of the present application, if any, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if any technical terms such as "installed", "connected", "connected", "fixed" and the like are to be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; 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 the embodiments of the present application can be understood according to the specific circumstances.

[0048] With the rapid development of new power systems based on new energy technologies, energy storage systems are being used more and more widely. Taking high-voltage energy storage systems as an example, they usually include high-voltage commutation systems and high-voltage energy storage systems. Among them, the high-voltage commutation system is used to realize the conversion function between AC and DC, while the high-voltage energy storage system is used to realize power output and energy storage functions. The high-voltage commutation system is usually formed by connecting multiple power modules in series / parallel. The power modules are light in weight and their power conduction layout is relatively simple.

[0049] The high-voltage energy storage system is used to achieve power output and energy storage functions, and usually requires multiple energy storage devices to be set up in series / parallel. Each energy storage device includes a power module, a cabinet, and other functional modules. The higher the system voltage and capacity of the high-voltage energy storage device, the more cabinets there are in the cabinet. Usually, the power transmission layout of the high-voltage energy storage device is relatively complex.

[0050] Most energy storage devices use cables to electrically connect power modules and electrical cabinets. When cables are used for connection, in energy storage devices with complex structures, the cables are easily entangled due to the influence of electric force, causing short circuits, which reduces the operating reliability of the energy storage device.

[0051] Based on the above considerations, in order to improve the operational reliability of the energy storage device and the energy storage system, the present application designs an energy storage device, in which an electric cabinet is electrically connected using an electric conduction component, and the electric conduction component conducts electricity through a connecting busbar. The connecting busbars are arranged at intervals, and the electric force between them is weak. The probability of the connecting busbars being entangled or contacted and causing a short circuit is greatly reduced compared to a cable connection, which helps to improve the electric conduction reliability of the electric conduction component, and thereby improve the operational reliability of the energy storage device and the energy storage system.

[0052] The energy storage system involved in the embodiment of the present application can be composed of multiple energy storage devices connected in series or parallel. The energy storage system can be used as an energy storage cabinet, energy storage station, etc. in new energy power systems such as wind energy, solar energy, and hydropower, but is not limited to it.

[0053] The energy storage device involved in the embodiment of the present application may be, but is not limited to, the energy storage rack involved in the embodiment of the present application as the rack structure for carrying each module. The modules included in the energy storage device include, but are not limited to, power modules, electric cabinet modules, etc. Among them, the electric cabinet module includes at least one electric cabinet, and the electric cabinet is a device for realizing electric energy storage. The electric cabinet usually includes a cabinet body, and at least one electric box is usually arranged in the cabinet body. At least one battery is usually arranged in each electric box, and the battery can realize the storage of electric energy. The power module is a component for realizing power output, including but not limited to thyristors, IGBTs (Insulated Gate Bipolar Transistors), etc. In addition, each module may also include other modules such as disconnecting modules and control modules. Among them, the disconnecting module may include an isolating switch, and the isolating switch is connected to the electric cabinet and / or the power module, and can be used to realize the opening and closing of the electric cabinet and / or the power module. The control module can be connected to the disconnecting module and other modules to realize the control of the disconnecting module and other modules.

[0054] Below, the energy storage device provided in the embodiment of the present application is first introduced in detail.

[0055] Figure 1 and Figure 2 Schematic diagram of the structure of the energy storage device 100 in different embodiments of the present application.

[0056] According to one or more embodiments of the present application, please refer to Figure 1 and Figure 2 The energy storage device 100 provided in the embodiment of the present application includes an energy storage rack 10 and an electric cabinet 20, and the energy storage rack 10 includes a frame 11 and a power conduction component 12. The power conduction component 12 and the electric cabinet 20 are arranged on the frame 11, which includes at least two connecting busbars 12a, each connecting busbar 12a extends along a first direction X, and is arranged side by side and spaced apart from each other along a second direction Y intersecting the first direction X. Part of the connecting busbar 12a serves as a positive connecting busbar a1, and the positive connecting busbar a1 is electrically connected to the positive pole 21 of at least part of the electric cabinet 20. Part of the connecting busbar 12a serves as a negative connecting busbar a2, and the negative connecting busbar a2 is electrically connected to the negative pole 22 of at least part of the electric cabinet 20.

[0057] The energy storage rack 10 includes a frame 11 and a power conducting assembly 12. The frame 11 is a rack structure that carries each module in the energy storage device 100, and can be, but is not limited to, composed of a plurality of longitudinal beams 11b and transverse beams 11a that are staggered (e.g., Figure 1 and Figure 2 In the embodiment shown in the figure, it can help reduce the weight and cost of the energy storage rack 10 and the frame 11. In other examples, the frame 11 can be a box-type structure. Generally, the frame 11 is a metal part, such as aluminum alloy, stainless steel, etc.

[0058] The electric cabinet 20 is a device for realizing electric energy storage, which usually includes a battery and a battery management system for managing the battery. The specific structure of the electric cabinet 20 can be conventionally designed by those skilled in the art. The electric cabinet 20 is arranged on the frame 11 of the energy storage rack 10. Specifically, a first accommodating area Q1 can be formed in the frame 11, and the electric cabinet 20 is accommodated in the first accommodating area Q1. The number of first accommodating areas Q1 can correspond one-to-one to the number of electric cabinets 20, or all electric cabinets 20 can be accommodated in the same first accommodating area Q1. The first accommodating area Q1 is usually, but not limited to, an open area to facilitate the taking and power connection of the electric cabinet 20.

[0059] The electric cabinet 20 and the frame 11 of the energy storage rack 10 are usually, but not limited to, detachable, to facilitate replacement of the electric cabinet 20. Specifically, the electric cabinet 20 and the frame 11 of the energy storage rack 10 can be detachably connected by means of snap connection, bolt connection, etc.

[0060] The power conduction component 12 is a component used to achieve current conduction, which is usually a component made of conductive materials, and the conductive materials can be but are not limited to pure copper, copper alloy, pure silver, silver alloy, etc. The power conduction component 12 is set on the frame 11, and can be specifically detachably set on the frame 11 to facilitate its replacement. It should be pointed out that the power conduction component 12 is usually insulated from the frame 11 to avoid electric shock caused by the conduction of the frame 11, and there are many ways to achieve the insulation between the power conduction component 12 and the frame 11, such as coating an insulating layer on the surface of the frame 11, and providing insulating glue on the frame 11 and the power conduction component 12.

[0061] The connecting busbar 12a is a power busbar with a large current flow capacity in the circuit connection. As a main transmission line, it can be connected to several branch lines. Its form is not limited to copper busbars and aluminum busbars. Generally, the cross-section of the connecting busbar 12a (perpendicular to its extension direction) is roughly rectangular. Of course, the cross-section of the connecting busbar 12a can also be groove-shaped. Usually, the surface of the connecting busbar 12a is insulated to avoid electric shock, such as coating an insulating layer, bonding insulating glue, etc.

[0062] Part of the connecting busbar 12a is used as the positive connecting busbar a1, which is used to be electrically connected to the positive electrode 21 of the electric cabinet 20, and the remaining part of the connecting busbar 12a is used as the negative connecting busbar a2, which is used to be electrically connected to the negative electrode 22 of the battery module. In other words, the positive electrode 21 of the electric cabinet 20 is shunted from the positive connecting busbar a1 to obtain electricity, and the negative electrode 22 of the electric cabinet 20 is connected from the negative connecting busbar a2 to transmit electricity.

[0063] Usually, the number of electric cabinets 20 arranged on the frame 11 is multiple to increase the voltage and capacity of the energy storage device 100. When multiple electric cabinets 20 are arranged, the positive poles 21 of a part of the electric cabinets 20 can be conductively connected via a part of the positive pole connection busbar a1, and the positive poles 21 of another part of the electric cabinets 20 can be conductively connected via another part of the positive pole connection busbar a1. Similarly, the negative poles 22 of a part of the electric cabinets 20 can be conductively connected via a part of the negative pole connection busbar a2, and the negative poles 22 of another part of the electric cabinets 20 can be conductively connected via another part of the negative pole connection busbar a2. Of course, when multiple electric cabinets 20 are arranged, all the positive poles 21 of all the electric cabinets 20 can be shunted via the same positive pole connection busbar a1, or the negative poles 22 of all the electric cabinets 20 can be connected via the same negative pole connection busbar a2.

[0064] There is a non-conductive connection between the positive electrode connecting busbar a1 and the negative electrode connecting busbar a2 to avoid a short circuit inside the power conducting component 12 .

[0065] The connecting busbar 12a and the electric cabinet 20 are arranged on the internal current loop of the energy storage device 100, and the connecting busbar 12a is used to input the loop current into the electric cabinet 20 via the positive electrode 21, and then output the electric cabinet 20 via the negative electrode 22. The structure located in the internal current loop of the energy storage device 100 may include a power module 40, a combiner cabinet 30, etc.

[0066] Each of the connecting busbars 12a extends approximately along a first direction X, which may be the lateral direction of the frame 11, and may correspond to the extension direction of the crossbeam 11a of the frame 11. Each of the connecting busbars 12a is arranged side by side and spaced apart along a second direction Y, and the second direction Y may be the longitudinal direction of the frame 11, and may correspond to the extension direction of the longitudinal beam 11b of the frame 11. Each of the connecting busbars 12a is arranged spaced apart in the second direction Y, so that the electric force between adjacent connecting busbars 12a is small, and the probability of short circuit due to the close proximity of the connecting busbars 12a is reduced.

[0067] The energy storage device 100 and the electrical cabinet 20 are connected to the external circuit via the connecting busbars 12a arranged in parallel. The connecting busbars 12a are arranged at intervals, thereby weakening the electric force between adjacent connecting busbars 12a and reducing the risk of short circuit between the connecting busbars 12a, which helps to improve the operating reliability of the energy storage device 100.

[0068] In the embodiments of the present application, "electrical connection" refers to a conductive connection, that is, a connection that allows current to flow.

[0069] In some embodiments, please refer to Figure 1 and Figure 2 The dimension of at least one connecting busbar 12a in the second direction Y is smaller than its dimension in the third direction Z, and the first direction X, the second direction Y and the third direction Z are arranged to intersect in pairs.

[0070] Generally, the first direction X corresponds to the transverse direction of the energy storage rack 10 , the second direction Y corresponds to the longitudinal direction of the energy storage rack 10 , and the third direction Z corresponds to the height direction of the energy storage rack 10 .

[0071] The connecting busbar 12a extends in a strip shape along a first direction X. Since the first direction X is the same as the extending direction of the connecting busbar 12a, the second direction Y and the third direction Z are substantially perpendicular to the extending direction of the connecting busbar 12a.

[0072] The size of the connecting busbar 12a in the second direction Y refers to the maximum size of its orthographic projection along the first direction X in the second direction Y. Similarly, the size of the connecting busbar 12a in the third direction Z refers to the maximum size of its orthographic projection along the first direction X in the third direction Z. Generally, but not limited to, the size of the connecting busbar 12a in the third direction Z is equal everywhere, and the size of the connecting busbar 12a in the second direction Y is equal everywhere. Specifically, the cross-sectional shape of the connecting busbar 12a is a rectangle, the direction of the long side of the rectangle corresponds to the third direction Z, and the direction of the short side of the rectangle corresponds to the second direction Y.

[0073] Since the connecting busbars 12a are spaced apart in the second direction Y, when the size of the connecting busbar 12a in the second direction Y is smaller than its size in the third direction Z, it helps to increase the spacing between adjacent connecting busbars 12a, reduce the electric force between adjacent connecting busbars 12a, and improve the operating reliability of the energy storage device 100.

[0074] exist Figure 1 and Figure 2 In the illustrated embodiment, the dimensions of all the connecting busbars 12a in the second direction Y are smaller than their respective dimensions in the third direction Z.

[0075] In some embodiments, please refer to Figure 1 and Figure 2 There are multiple electric cabinets 20, and the multiple electric cabinets 20 are arranged side by side along the second direction Y, and each row of electric cabinets 20 includes at least one electric cabinet 20. The positive poles 21 of the electric cabinets 20 in the same row are electrically connected to the same positive pole connecting busbar a1, and the negative poles 22 of the electric cabinets 20 in the same row are electrically connected to the same negative pole connecting busbar a2.

[0076] Each row of electrical cabinets 20 may include one or more electrical cabinets 20. Specifically, each row of electrical cabinets 20 includes a plurality of electrical cabinets 20. The number of electrical cabinets 20 in each row of electrical cabinets 20 may be the same or different, as long as each row of electrical cabinets 20 is arranged side by side in the second direction Y. Figure 1 and Figure 2 In the illustrated embodiment, the electric cabinets 20 are arranged in two rows, and the number of the electric cabinets 20 in the two rows is different.

[0077] As an example, all the connecting busbars 12a include a positive connecting busbar a1 and a negative connecting busbar a2, and all the positive poles 21 of all or part of the electric cabinets 20 can be electrically connected to the positive connecting busbar a1, and all the negative poles 22 of all or part of the electric cabinets 20 can be electrically connected to the negative connecting busbar a2. Of course, a positive connecting busbar a1 and a negative connecting busbar a2 can also be arranged for each row or two rows or even multiple rows of electric cabinets 20. Usually but not limited to, each electric cabinet 20 includes a positive pole 21 and a negative pole 22, and of course, the feasibility of each electric cabinet 20 including multiple positive poles 21 and / or multiple negative poles 22 is not excluded.

[0078] In each row of electrical cabinets 20, the positive poles 21 of all electrical cabinets 20 are electrically connected to the same positive pole connection busbar a1, and the negative poles 22 of all electrical cabinets 20 are electrically connected to the same negative pole connection busbar a2, so that each row of electrical cabinets 20 is arranged in parallel, and the connection process of the positive poles 21 and negative poles 22 of each electrical cabinet 20 is simpler and more convenient, thereby reducing the error rate.

[0079] In some embodiments, please refer to Figure 1 and Figure 2 The power conduction component 12 includes multiple groups of connecting busbars 12a, each group of connecting busbars 12a includes a positive connecting busbar a1 and a negative connecting busbar a2, and the multiple groups of connecting busbars 12a are arranged in sequence in the second direction Y, and each row of electrical cabinets 20 is electrically connected to different groups of connecting busbars 12a.

[0080] That is, a row of electric cabinets 20 is correspondingly configured with a group of connecting busbars 12a, the positive connecting busbar a1 in each group of connecting busbars 12a is electrically connected to all or part of the positive electrodes 21 in the corresponding row of electric cabinets 20, and the negative connecting busbar a2 in each group of connecting busbars 12a is electrically connected to all or part of the negative electrodes 22 in the corresponding row of electric cabinets 20. Generally, but not limited to, a group of connecting busbars 12a includes a positive connecting busbar a1 and a negative connecting busbar a2.

[0081] At this time, a row of electric cabinets 20 is correspondingly arranged with a group of connecting busbars 12a, and the positive connecting busbar a1 in the group of connecting busbars 12a is used to electrically connect the positive poles 21 of the row of electric cabinets 20, and the negative connecting busbar a2 in the group of connecting busbars 12a is used to connect all the negative poles 22 of the row of electric cabinets 20. The power conduction of each row of electric cabinets 20 is separately arranged, which is more conducive to the design of the power conduction scheme and the layout of the connecting busbars 12a, and each row of electric cabinets 20 can be closer to the corresponding connecting busbar 12a, which helps to reduce the length of the positive pole 21 and the negative pole 22, thereby reducing the cost.

[0082] In some embodiments, please refer to Figure 1 and Figure 2In at least two adjacent groups of connecting busbars 12a, the positive connecting busbars a1 and the negative connecting busbars a2 are connected in parallel or in series.

[0083] exist Figure 1 and Figure 2 In the illustrated embodiment, the power conducting assembly 12 includes two groups of connecting busbars 12a, namely, a first group of connecting busbars 12a (denoted by R1) and a second group of connecting busbars 12a (denoted by R2). The first group of connecting busbars 12a is electrically connected to one row of electrical cabinets 20, and the second group of connecting busbars 12a is electrically connected to another row of electrical cabinets 20.

[0084] exist Figure 1 In the illustrated embodiment, the positive connection busbar a1 in the first group of connection busbars 12a is arranged in parallel with the positive connection busbar a1 in the second group of connection busbars 12a, and the ratio of the current amounts of the positive connection busbars a1 in the two groups of connection busbars 12a is roughly related to the number of connected electric cabinets 20. Similarly, the negative connection busbar a2 in the first group of connection busbars 12a is arranged in parallel with the negative connection busbar a2 in the second group of connection busbars 12a, and the ratio of the current amounts of the negative connection busbar a2 in the two groups of connection busbars 12a is roughly related to the number of connected electric cabinets 20.

[0085] For example, in Figure 1 In the embodiment, the first row of electrical cabinets 20 is electrically connected to the first group of connecting busbars 12a, and the second row of electrical cabinets 20 is electrically connected to the second group of connecting busbars 12a. The first row of electrical cabinets 20 includes 5 electrical cabinets 20, and the second row of electrical cabinets 20 includes 4 electrical cabinets 20. Then, the current flowing through the positive connecting busbar a1 and the negative connecting busbar a2 in the first group of connecting busbars 12a is approximately 5 / 9 of the total current. Similarly, the current flowing through the positive connecting busbar a1 and the negative connecting busbar a2 in the second group of connecting busbars 12a is approximately 4 / 9 of the total current.

[0086] It can be seen that this parallel shunt arrangement can reduce the current size of each branch corresponding to the positive connecting busbar a1 / negative connecting busbar a2. The smaller the current, the smaller the electric force generated between the positive connecting busbar a1 and the negative connecting busbar a2. This helps to reduce the electric force exerted on the connecting busbar 12a, thereby improving the reliability of the power conduction component 12.

[0087] exist Figure 2 In the illustrated embodiment, the positive connecting busbar a1 in the first group of connecting busbars 12a is arranged in series with the positive connecting busbar a1 in the second group of connecting busbars 12a, and the negative connecting busbar a2 in the first group of connecting busbars 12a is arranged in series with the negative connecting busbar a2 in the second group of connecting busbars 12a.

[0088] When the positive pole connecting busbars a1 are arranged in series, and the negative pole connecting busbars a2 are arranged in series, the current shunted from the positive pole connecting busbar a1 to the positive pole 21 of each electric cabinet is basically the same, and the current flowing from the negative poles 22 to the negative pole connecting busbar a2 is basically consistent. In this way, the difference in inductance and resistance of the branch where each electric cabinet 20 is located can be smaller, which helps to reduce the uneven flow of each electric cabinet 20.

[0089] It should be noted that when the connecting busbars 12a include multiple groups, the connecting busbars 12a adjacent to each other can be connected in series / parallel as a series / parallel unit, and the series / parallel connection of the positive connecting busbar a1 and the series / parallel connection of the negative connecting busbar a2 can be performed in each unit. Of course, in other examples, in two adjacent groups of connecting busbars 12a, the positive connecting busbars a1 can be connected in parallel and the negative connecting busbars a2 can be connected in series, or the positive connecting busbars a1 can be connected in series and the negative connecting busbars a2 can be connected in parallel.

[0090] In some embodiments, there are two groups of adjacently arranged connecting busbars 12a, and in the second direction Y, at least two negative connecting busbars a2 are arranged adjacently, or at least two positive connecting busbars a1 are arranged adjacently.

[0091] Specifically, the two adjacently arranged groups of connecting busbars 12a, the negative connecting busbars a2 are arranged adjacently, and the positive connecting busbars a1 are separated by the negative connecting busbars a2 (such as Figure 1 and Figure 2 Embodiment shown). Alternatively, in two adjacently arranged groups of connecting busbars 12a, the positive connecting busbars a1 are arranged adjacent to each other, and the negative connecting busbars a2 are separated by the positive connecting busbar a1. Of course, when each group of connecting busbars 12a includes a plurality of positive connecting busbars a1 or a plurality of negative connecting busbars a2, in two adjacent groups of connecting busbars 12a, there may be at least one negative connecting busbar a2 and a positive connecting busbar a1 between the other negative connecting busbars a2, or at least one positive connecting busbar a1 and a negative connecting busbar a2 between the other positive connecting busbar a1.

[0092] Specifically, in two adjacent groups of connecting busbars 12a, along the second direction Y, all negative connecting busbars a2 are located between all positive connecting busbars a1 (eg Figure 1 and Figure 2 ), or, all positive electrode connecting busbars a1 are located between all negative electrode connecting busbars a2.

[0093] In this way, when arranging the negative electrode connecting busbar a2 and the positive electrode connecting busbar a1, the probability of staggered arrangement of the two can be reduced, which helps to reduce the probability of short circuit contact between the two, thereby improving the reliability of the power conduction component 12.

[0094] Of course, in other embodiments, in two adjacent groups of connecting busbars 12a, the negative connecting busbars a2 and the positive connecting busbars a1 may be arranged alternately in the second direction Y.

[0095] In some embodiments, please refer to Figure 1 and Figure 2 The power transmission component 12 further includes a positive transition busbar 12b, and the two positive connection busbars a1 arranged in parallel or in series are electrically connected via the positive transition busbar 12b. And / or, the power transmission component 12 further includes a negative transition busbar 12c, and the two negative connection busbars a2 arranged in parallel or in series are electrically connected via the negative transition busbar 12c.

[0096] The positive transition busbar 12b and the negative transition busbar 12c are both busbar parts, which can be copper busbars, aluminum busbars, etc. The positive transition busbar 12b is connected between the positive connection busbars a1, which can realize the series / parallel connection between the positive connection busbars a1, and it can be electrically connected with the positive connection busbar a1 bracket by integral molding, welding, etc.

[0097] The negative transition busbar 12c is connected between the negative connection busbars a2, and can realize series / parallel connection between the negative connection busbars a2. It can be electrically connected to the negative connection busbar a2 bracket by integral molding, welding, etc.

[0098] Generally, the positive transition busbar 12b and the negative transition busbar 12c are arranged to extend along the second direction Y. In addition, the projection shape of the positive transition busbar 12b in its extension direction is substantially the same as the projection shape of the connected positive connection busbar a1 in its extension direction. Similarly, the projection shape of the negative transition busbar 12c in its extension direction is substantially the same as the projection shape of the connected negative connection busbar a2 in its extension direction. Figure 1 and Figure 2 In the illustrated embodiment, the projection shapes of the positive transition busbar 12b, the negative transition busbar 12c, the positive connection busbar a1, and the negative connection busbar a2 in their respective extension directions are all roughly rectangular shapes of the same size.

[0099] exist Figure 1 In the illustrated embodiment, the positive transition busbar 12b is connected between two parallel positive connection busbars a1, and the negative transition busbar 12c is connected between two parallel negative connection busbars a2. Figure 2 In the illustrated embodiment, the positive transition busbar 12b is connected between two positive connection busbars a1 connected in series, and the negative transition busbar 12c is connected between two negative connection busbars a2 connected in series.

[0100] It can be understood that the positive transition busbar 12b and the negative transition busbar 12c are spaced apart from other connecting busbars 12a to reduce the electric force between them.

[0101] The positive transition busbar 12b and the negative transition busbar 12c in the form of busbars are used to respectively realize the electrical connection between the positive connection busbar a1 and the negative connection busbar a2. The busbars have good resistance to electromotive force and deform to a lower degree, which helps to improve the reliability of the power conduction component 12.

[0102] In other embodiments, the positive electrode connecting busbars a1 and the negative electrode connecting busbars a2 may be electrically connected via cables.

[0103] Generally, without limitation, the positive transition busbar 12 b and the negative transition busbar 12 c only realize current transition transmission without shunting or converging the electric cabinet 20 , that is, they are not connected to the positive electrode 21 or the negative electrode 22 of the electric cabinet 20 .

[0104] In some embodiments, please refer to Figure 1 In at least one row of electric cabinets 20, the positive poles 21 of some electric cabinets 20 are electrically connected to the positive transition busbar 12b, and / or the negative poles 22 of some electric cabinets 20 are electrically connected to the negative transition busbar 12c.

[0105] exist Figure 1 In the illustrated embodiment, the first row of electrical cabinets 20 includes five electrical cabinets 20, wherein the positive poles 21 of four adjacent electrical cabinets 20 are electrically connected to the same positive pole connection busbar a1, and the negative poles 22 thereof are electrically connected to the same negative pole connection busbar a2; the positive pole 21 of another electrical cabinet 20 is electrically connected to the positive pole transition busbar 12b, and the negative pole 22 thereof is electrically connected to the negative pole transition busbar 12c.

[0106] At this time, the positive transition busbar 12b and the negative transition busbar 12c are further utilized for current diversion and convergence, which improves the utilization rate of both, helps to reduce the busbar length of the power conduction component 12, and reduces costs.

[0107] In some embodiments, the positive electrode 21 and the negative electrode 22 are located at one end of the electric cabinet 20 in the third direction Z close to the power conduction component 12 , and the positive electrode 21 and / or the negative electrode 22 are cable components.

[0108] As mentioned above, the third direction Z may not be limited to the height direction of the frame 11. The power conduction component 12 is located at one side of the electric cabinet 20 in the third direction Z, and the positive electrode 21 and the negative electrode 22 are located at one end of the electric cabinet 20 close to the power conduction component 12 in the third direction Z, that is, the electric cabinet 20 is electrically connected to the power conduction component 12 in the third direction Z via its positive electrode 21 and negative electrode 22.

[0109] The positive electrode 21 and / or the negative electrode 22 are cable parts, that is, both can be formed by cables. Cables are a device for transmitting electric energy or signals, usually composed of several or several groups of wires. The positive electrode 21 and the negative electrode 22 are prepared by cables. Since the cables have strong deformability, when the cables are connected, the shape of the cables can be flexibly changed to adapt to the positional relationship between the electric cabinet 20 and the connecting busbar 12a or the transition busbar. The electrical connection operation between the positive electrode 21 / negative electrode 22 and the power conduction component 12 is easier to achieve, and the cable price is relatively low, which can reduce costs.

[0110] It should be noted that the positive electrode 21 and the negative electrode 22 are usually electrically connected to the connecting busbar 12 a with the shortest length to reduce costs.

[0111] In some embodiments, please refer to Figure 1 and Figure 2 The electric cabinets 20 are arranged in multiple rows, each row of the electric cabinets 20 includes multiple electric cabinets 20 arranged in sequence in the first direction X, and in at least one row of the electric cabinets 20, the positive poles 21 of each electric cabinet 20 are located on the same side of the negative poles 22 thereof in the second direction Y.

[0112] like Figure 2 As shown, in the electric cabinets 20 in the same row, the positive poles 21 of the electric cabinets 20 are located on the same side of the negative poles 22 in the second direction Y. Figure 1 As shown, in the second row of electrical cabinets 20 including 4 electrical cabinets 20, the positive poles 21 of each electrical cabinet 20 are located on the same side of the negative pole 22 in the second direction Y, and in the first row of electrical cabinets 20 including 5 electrical cabinets 20, the positive poles 21 of 4 electrical cabinets 20 are located on the same side of the negative pole 22 in the second direction Y.

[0113] Generally, the relative positions of the positive pole 21 and the negative pole 22 of each electric cabinet 20 on the electric cabinet 20 are roughly the same. When the electric cabinet 20 is installed on the frame 11, the positive pole 21 and the negative pole 22 can be installed in the same placement direction so that the positive pole 21 and the negative pole 22 are arranged in the same orientation in the second direction Y.

[0114] When the positive pole 21 and the negative pole 22 in the same row of electrical cabinets 20 are arranged in the same orientation in the second direction Y, it helps to make the length of the positive pole 21 and the length of the negative pole 22 in the branch where each electrical cabinet 20 is located basically consistent, and helps to make the inductance and resistance values ​​of the branch where the electrical cabinet 20 is located basically consistent, thereby reducing the uneven flow of each electrical cabinet 20.

[0115] Figure 3 Schematic diagram of electrical connections of the energy storage device 100 according to one or more embodiments of the present application.

[0116] In some embodiments, the energy storage device 100 further includes a combiner cabinet 30 and a power module 40 . The combiner cabinet 30 is electrically connected to the power module 40 , and is electrically connected to the electric cabinet 20 via the power conducting assembly 12 .

[0117] The combiner cabinet 30 is mainly used to accommodate and organize most of the modules in the energy storage device 100 except the power module 40 and the electric cabinet 20, including but not limited to the segmentation module, the control module, etc. The general combiner cabinet 30 includes a cabinet body, and each module is accommodated in the cabinet body of the combiner module 30. The power module 40 is electrically connected to the combiner cabinet 30, and the combiner cabinet 30 is electrically connected to the electric cabinet 20 through the power conduction component 12.

[0118] Generally, the combiner cabinet 30 has a square structure.

[0119] At this time, the positions and shapes of most modules except the power module 40 and the electric cabinet 20 are integrated through the combiner cabinet 30. When the combiner cabinet 30, the electric cabinet 20 and the power module 40 are arranged in the frame 11, it is easier to lay out, and the spacing between them is smaller, making the overall structure of the energy storage device 100 more compact.

[0120] In some embodiments, see Figure 1 and Figure 2 The power conduction component 12 also includes a positive busbar 12d and a negative busbar 12e. At least part of the positive busbar a1 is electrically connected to the busbar cabinet 30 via the positive busbar 12d, and at least part of the negative busbar a2 is electrically connected to the busbar cabinet 30 via the negative busbar 12e.

[0121] The positive busbar 12d and the negative busbar 12e are both busbar components, and both are used to carry larger currents, respectively realize the output of large currents from the busbar 30 to the positive pole 21 of each electric cabinet 20, and converge the small currents transmitted by the negative pole 22 of each electric cabinet 20 to the busbar 30. The positive busbar 12d and the positive connection busbar a1 can usually be connected via the positive transition busbar 12b, and the negative busbar 12e and the negative connection busbar a2 can usually be connected via the negative transition busbar 12c. In other examples, part of the positive busbar 12d and the positive connection busbar a1 can also be connected by cables, and part of the negative busbar 12e and the negative connection busbar a2 can also be connected by cables.

[0122] Generally, but not limited to, the positive bus bar 12d and the negative bus bar 12e are arranged to extend along the third direction Z.

[0123] The arrangement of the positive busbar 12d and the negative busbar 12e facilitates the connection between the busbar cabinet 30 and the power conduction component 12 , and both are relatively strong and resistant to deformation, which helps to improve the reliability of the power conduction component 12 .

[0124] In some embodiments, see Figure 1 and Figure 2 , in the second direction Y, the spacing distance between adjacent connecting busbars 12a is L1, and the value of L1 is 100mm-450mm. Further optionally, the value of L1 is 350mm-450mm. When the spacing distance between the connecting busbars 12a is selected in the range of 100mm-450mm or even 350mm-450mm, the electric force between the adjacent connecting busbars 12a is small, and the layout of the power conduction component 12 in the second direction Y is also relatively compact.

[0125] Specifically, the value of L1 can be 250mm, 350mm, 360mm, 370mm, 380mm, 390mm, 400mm, 410mm, 420mm, 430mm, 440mm or 450mm and any value between adjacent values.

[0126] In some embodiments, in the second direction Y, each connecting busbar 12a is spaced apart from the frame 11. This includes the two connecting busbars 12a located at the first and last positions in the second direction Y being spaced apart from the frame 11, and also includes the middle connecting busbar 12a located between the first and last connecting busbars 12a being spaced apart from the frame 11.

[0127] The spacing arrangement between the busbar 12a and the frame 11 refers to the entire spacing arrangement between the busbar 12a and the frame 11. Figure 1 and Figure 2 In the illustrated embodiment, the middle connecting busbar 12a located between the first and last connecting busbars 12a and the crossbeam 11a located in the middle of the frame 11 are arranged at intervals.

[0128] Usually, the frame 11 is a metal part, such as stainless steel, aluminum alloy, etc. The connecting busbar 12a is arranged at a distance from the frame 11, which can reduce the risk of leakage of the frame 11.

[0129] It can be understood that the transition busbar and the frame 11 are also arranged at intervals.

[0130] In some embodiments, the spacing distance between the connecting busbar 12a and the frame 11 in the third direction Z is selected between 60mm-70mm. Further, the spacing distance between the transition busbar (i.e., the positive transition busbar 12b and the negative transition busbar 12c) and the frame 11 in the third direction Z is selected between 60mm-70mm. Experiments have shown that within the range of 60mm-70mm, there is sufficient air clearance and creepage distance between the connecting busbar 12a and the frame 11 and between the transition busbar and the frame 11, and the structure of the energy storage rack 11 in the third direction Z is also relatively compact.

[0131] In one embodiment of the present application, the energy storage device 100 includes a plurality of electric cabinets 20, a junction cabinet 30 and an energy storage rack 10, the energy storage rack 10 includes a frame 11 and a power conduction component 12, and the power conduction component 12 is electrically connected between the junction cabinet 30 and all the electric cabinets 20. The power conduction component 12 includes two rows of connecting busbars 12a, each row of connecting busbars 12a includes a positive connecting busbar a1 and a negative connecting busbar a2, the electric cabinet 20 includes two rows, and the two rows of connecting busbars 12a are arranged one by one on one side of the two rows of electric cabinets 20 in the third direction Z. Each positive pole 21 of each row of electric cabinets 20 is electrically connected to the positive connecting busbar a1 of the corresponding connecting row, and each negative pole 22 of each row of electric cabinets 20 is electrically connected to the negative connecting busbar a2 of the corresponding connecting row. The size of each connecting busbar 12a in the second direction Y is smaller than its size in the third direction Z.

[0132] The positive connecting busbars a1 in each row of connecting busbars 12a are arranged in parallel, the negative connecting busbars a2 in each row of connecting busbars 12a are arranged in parallel, and all the negative connecting busbars a2 are located between all the positive connecting busbars a1 in the second direction Y.

[0133] In another embodiment of the present application, different from the above embodiment, the positive connecting busbars a1 in each row of connecting busbars 12a are arranged in series, and the negative connecting busbars a2 in each row of connecting busbars 12a are arranged in series.

[0134] It should be noted that the energy storage rack 10 in the energy storage device 100 in the embodiment of the present application may have all the technical features of the energy storage rack 10 mentioned in the following embodiments.

[0135] In addition, the present application also provides an energy storage rack 10, which can be applied to the energy storage device 100 in the above embodiment. Figure 1 and Figure 2As shown, the energy storage rack 10 in the embodiment of the present application includes a frame 11 and a power conduction component 12, the frame 11 is formed with a first accommodation area Q1 for accommodating the electric cabinet 20, and the power conduction component 12 includes at least two connecting busbars 12a, each connecting busbar 12a is extended along the first direction X, and all the connecting busbars 12a are arranged side by side along the second direction Y. The connecting busbars 12a are arranged on one side of the first accommodation area Q1 in the third direction Z, and the first direction X, the second direction Y and the third direction Z are arranged to intersect each other.

[0136] For the introduction of the frame 11 , the power conducting component 12 , the connecting busbar 12 a , the first direction X, the second direction Y and the third direction Z, please refer to the above description and will not be repeated here.

[0137] It can be understood that among the at least two connecting busbars 12a, part of the connecting busbars 12a are used as positive connecting busbars a1, and part of the connecting busbars 12a are used as negative connecting busbars a2. The positive connecting busbar a1 is used to electrically connect to the positive electrode 21 of the electric cabinet 20 accommodated in the first accommodating area Q1, and the negative connecting busbar a2 is used to electrically connect to the negative electrode 22 of the electric cabinet 20 accommodated in the first accommodating area Q1.

[0138] The number of first accommodating areas Q1 can correspond to the number of electric cabinets 20 one by one, or all electric cabinets 20 can be accommodated in the same first accommodating area Q1. The first accommodating area Q1 is usually but not limited to an open area to facilitate the removal and power connection of the electric cabinets 20.

[0139] Without limitation, the frame 11 includes longitudinal beams 11b, transverse beams 11a and vertical beams (not shown in the figure) that are crisscrossed, and part of the minimum space formed by the staggered enclosure of the three beams can form a first accommodating area Q1.

[0140] In the embodiment of the present application, after the power conduction component 12 and the frame 11 are installed to form a whole, the user can selectively accommodate the required electrical cabinet 20 in the first accommodation area Q1, and electrically connect the positive pole 21 and the negative pole 22 of the electrical cabinet 20 to the corresponding connecting busbar 12a.

[0141] When the energy storage rack 10 is applied to the energy storage device 100, the connecting busbars 12a arranged side by side in the second direction Y are electrically connected to the electric cabinet 20, and the connecting busbars 12a are arranged at intervals, thereby weakening the electric force between adjacent connecting busbars 12a, reducing the risk of short circuit between the connecting busbars 12a, and helping to improve the operating reliability of the energy storage device 100.

[0142] It should be noted that if the structure involved in the energy storage rack 10 is mentioned in the introduction of the energy storage device 100, it has the characteristics and effects mentioned above.

[0143] In some embodiments, please refer to Figure 1 and Figure 2 The frame 11 includes a plurality of first accommodating areas Q1, which are arranged side by side along the second direction Y. The power conducting assembly 12 includes a plurality of groups of connecting busbars 12a, each group of connecting busbars 12a includes at least two connecting busbars 12a, and the plurality of groups of connecting busbars 12a are arranged in sequence along the second direction Y. A group of connecting busbars 12a is arranged on one side of at least one row of first accommodating areas Q1 in the third direction Z.

[0144] Typically but not limited to, all first accommodation areas Q1 are arranged side by side along the second direction Y. Typically but not limited to, a group of connecting busbars 12a is arranged on one side of each row of first accommodation areas Q1 in the third direction Z.

[0145] Specifically in the example, each row of first accommodating areas Q1 is arranged with a row of connecting busbars 12a on one side of the third direction Z, and each row of connecting busbars 12a includes at least two connecting busbars 12a, wherein some of the connecting busbars 12a can be used as positive connecting busbars a1 to simultaneously electrically connect the positive poles 21 of at least some of the electrical cabinets 20 accommodated in the first accommodating areas Q1 of the row; wherein some of the connecting busbars 12a can be used as negative connecting busbars a2 to simultaneously electrically connect the negative poles 22 of at least some of the electrical cabinets 20 accommodated in the first accommodating areas Q1 of the row.

[0146] At this time, of the electrical cabinets 20 accommodated in each row of the first accommodating area Q1, at least part of the positive poles 21 can be electrically connected to the same positive pole connecting busbar a1, and at least part of the negative poles 22 can be electrically connected to the same negative pole connecting busbar a2, making it more convenient to connect the electrical cabinets 20 and reducing the error rate.

[0147] In some embodiments, please refer to Figure 1 and Figure 2 Each group of connecting busbars 12a includes a positive connecting busbar a1 and a negative connecting busbar a2. In at least two adjacent groups of connecting busbars 12a, the positive connecting busbars a1 and the negative connecting busbars a2 are arranged in parallel or in series.

[0148] When the positive electrode busbars a1 are connected in parallel, the current flowing through each positive electrode busbar 21 is related to the number of connected electrical cabinets 20. Moreover, when the positive electrode busbars a1 and the negative electrode busbars a2 are connected in parallel, the total current is divided, and the current flowing through each busbar is small, which can reduce the electric power.

[0149] When the negative connecting busbars a2 and the positive connecting busbars a1 are connected in series, the current on each negative connecting busbar a2 and each positive connecting busbar a1 is substantially the same, which helps to make the currents of the branches of the electrical cabinet 20 consistent and reduce uneven flow.

[0150] Of course, in other embodiments, in two adjacent groups of connecting busbars 12a, the positive connecting busbars a1 may be connected in series and the negative connecting busbars 12a may be connected in parallel, or the positive connecting busbars a1 may be connected in parallel and the negative connecting busbars 12a may be connected in series, or some of the positive connecting busbars a may be connected in series and some in parallel, and some of the negative connecting busbars 12a may be connected in series and some in parallel.

[0151] In some embodiments, the frame 11 further forms a second accommodating area Q2 and a third accommodating area Q3, which are arranged sequentially in the third direction Z and staggered with the plurality of first accommodating areas Q1 in a plane perpendicular to the third direction Z.

[0152] The second accommodation area Q2 is used to accommodate the combiner cabinet 30, and the third accommodation area Q3 is used to accommodate the power module 40. The second accommodation area Q2 and the third accommodation area Q3 can be formed by the longitudinal beam 11b, the transverse beam 11a and the vertical beam by referring to the formation method of the first accommodation area Q1.

[0153] Typically but not limited to, the second accommodation area Q2 and the third accommodation area Q3 are each configured with one.

[0154] The second accommodation area Q2 and the third accommodation area Q3 are arranged up and down along the third direction Z, and the accommodation height of the plurality of first accommodation areas Q1 in the third direction Z can be substantially the same as the total accommodation height of the second accommodation area Q2 and the third accommodation area Q3. The second accommodation area Q2 and the third accommodation area Q3 are staggered with the plurality of first accommodation areas Q1 in a plane perpendicular to the third direction Z, that is, the projections of the first accommodation area Q1, the second accommodation area Q2 and the third accommodation area Q3 along the third direction Z do not overlap, which is conducive to electrical connection between each other. Among them, the first accommodation area Q1 includes all or part of the first accommodation area Q1.

[0155] At this time, the energy storage rack 10 can accommodate the power module 40 and the combiner cabinet 30, and the integration level is higher.

[0156] In some embodiments, please refer to Figure 1 and Figure 2 The energy storage rack 10 further includes an insulating support 14 , and at least a portion of the connecting busbar 12 a is supported on the frame 11 via the insulating support 14 .

[0157] The insulating support 14 has an insulating effect and can support the frame 11 and the connecting busbar 12a. Of course, when the power conduction component 12 also includes a positive transition busbar 12b and a negative transition busbar 12c, the positive transition busbar 12b and the negative transition busbar 12c can also be supported on the frame 11 by the insulating support 14.

[0158] By propping the connecting busbar 12 a and the frame 11 apart through the insulating support member 14 , a certain air clearance and creepage distance can be retained between the connecting busbar 12 a and the frame 11 , thereby reducing the risk of electrical leakage of the frame 11 .

[0159] In some embodiments, at least part of the connecting busbar 12a is clamped on the insulating support 14. That is, part of the connecting busbar 12a supported on the frame 11 by the insulating support 14 is clamped by the insulating support 14. There are many specific clamping methods, which can be flexibly selected. The clamping method facilitates the installation of the connecting busbar 12a and can be achieved without the help of installation tools.

[0160] Figure 4 This is a schematic diagram of the structure of the insulating support member 14 according to one or more embodiments of the present application.

[0161] In some embodiments, see Figure 4 The insulating support member 14 includes an insulator 14f, a first fixing plate 14g and a second fixing plate 14h. The first fixing plate 14g and the second fixing plate 14h are spaced apart to form a clamping space and are jointly arranged at one end of the insulator 14f in the third direction Z. The other end of the insulator 14f in the third direction Z is arranged on the frame 11.

[0162] The first fixing plate 14g and the second fixing plate 14h may be insulating plates, such as ceramic plates, or conductive plates, such as metal plates. The insulator 14f is a device that can withstand voltage and mechanical stress, and may be, but is not limited to, a ceramic component.

[0163] The insulator 14f and the first fixing plate 14g and the second fixing plate 14h may be bonded, fastened, etc.

[0164] At this time, the connecting busbar 12a or the transition busbar is clamped by the clamping space formed by the first fixing plate 14g and the second fixing plate 14h, so that the connecting busbar 12a and the transition busbar are easy to install and can be clamped reliably.

[0165] It should be noted that the clamping space formed by the first fixing plate 14g and the second fixing plate 14h is arranged to be continuous in the extension direction of the clamped connecting busbar 12a or transition busbar.

[0166] In some embodiments, the energy storage rack 10 further includes a flange structure 13 , which is disposed at both ends of the frame 11 in the third direction Z and protrudes from the frame 11 .

[0167] The flange structure 13 is a structure that connects two objects. Usually, the flange structure 13 is disc-shaped and is provided with fastening holes and the like.

[0168] The flange structure 13 is disposed on both ends of the frame 11 in the third direction Z. Specifically, the outer contour of the frame 11 is roughly rectangular, and the flange structure 13 is disposed at four diagonal positions of the end surface of the frame 11 in the third direction Z. In addition, the flange structure 13 can also be disposed in the middle of the long side and the short side of the frame 11.

[0169] The flange structure 13 protrudes from the frame 11 along the third direction Z, which can allow a certain space to be spaced between two adjacent layers of the frame 11, which not only facilitates the fixed connection of the flange structure 13, but also improves the two adjacent layers of the frame 11. There can be a certain space between the power conduction component 12 on one frame 11 and the other frame 11, which can reduce the risk of leakage of the frame 11 and provide sufficient layout space for the power conduction component 12, making the layout of the power conduction component 12 more flexible.

[0170] In actual application, the energy storage devices 100 are stacked along the third direction Z to form an energy storage system. The stacked energy storage devices 100 can be connected to each other by being butted and fixed via their respective flange structures 13 .

[0171] At this time, flange structures 13 are configured at both ends of the frame 11 in the third direction Z, so that the energy storage devices 100 can be stacked, and sufficient space for installing the power conduction component 12 is reserved between the frames 11 of the energy storage devices 100 on both sides of the third direction Z, which can reduce the risk of leakage of the frame 11.

[0172] In one embodiment of the present application, the energy storage rack 10 includes a frame 11 and a power conduction component 12, and the power conduction component 12 includes two groups of connecting busbars 12a, each group of connecting busbars 12a includes a positive connecting busbar a1 and a negative connecting busbar a2. The frame 11 is formed with a first accommodating area Q1, a second accommodating area Q2 and a third accommodating area Q3, and the second accommodating area Q2 and the third accommodating area Q3 are arranged up and down along the third direction Z, and the second accommodating area Q2 and the third accommodating area Q3 are adjacent to all the first accommodating areas Q1 as a whole on a plane perpendicular to the third direction Z and staggered. Multiple first accommodating areas Q1 are formed in multiple rows along the second direction Y, and each row of first accommodating areas Q1 is arranged with a group of connecting busbars 12a above the third direction Z. In two adjacent groups of connecting busbars 12a, the positive connecting busbars a1 and the negative connecting busbars a2 are arranged in series or in parallel. In addition, the dimension of the connecting busbar 12a in the second direction Y is smaller than the dimension of the connecting busbar 12a in the third direction Z.

[0173] In addition, the embodiment of the present application further provides an energy storage system, including the energy storage device 100 in the above embodiment, which includes all the beneficial effects in the above embodiment, which will not be repeated here.

[0174] In some embodiments, the energy storage system includes a plurality of energy storage devices 100, and the plurality of energy storage devices 100 are stacked in a third direction Z. Specifically, the energy storage devices 100 can be stacked and connected via a flange structure 13. Further, under the support of the flange structure 13, the interlayer spacing between the frames 11 of adjacent energy storage devices 100 is selected to be between 150 mm and 250 mm. Specifically, the interlayer spacing can be selected to be 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, 210 mm, 220 mm, 230 mm, 240 mm, 250 mm, and values ​​between any two adjacent values.

[0175] Of course, among all the energy storage devices 100, some of the energy storage devices 100 can be stacked along the third direction Z to form a group, and the remaining energy storage devices 100 can be independently arranged or also stacked along the third direction Z to form another group.

[0176] At this time, a plurality of energy storage devices 100 are stacked in the third direction Z to form an energy storage system. The energy storage system can freely combine the energy storage devices 100 according to system requirements, and has a high degree of scalability.

[0177] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0178] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An energy storage device (100), characterized in that: include: Electric cabinet (20); The energy storage rack (10) comprises: Framework (11); and A power conducting component (12) is arranged on the frame (11) together with the electrical cabinet (20); the power conducting component (12) comprises at least two connecting busbars (12a), each of the connecting busbars (12a) extending along a first direction (X) and arranged side by side and spaced apart from each other along a second direction (Y) intersecting the first direction (X); Part of the connecting busbar (12a) serves as a positive connecting busbar (a1), and the positive connecting busbar (a1) is electrically connected to a positive electrode (21) of at least part of the electric cabinet (20); and part of the connecting busbar (12a) serves as a negative connecting busbar (a2), and the negative connecting busbar (a2) is electrically connected to a negative electrode (22) of at least part of the electric cabinet (20).

2. The energy storage device (100) according to claim 1, characterized in that: The size of at least one of the connecting busbars (12a) in the second direction (Y) is smaller than its size in the third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) are arranged to intersect each other.

3. The energy storage device (100) according to claim 1, characterized in that: The electric cabinets (20) are configured in plurality, and the plurality of electric cabinets (20) are arranged side by side along the second direction (Y), and each row of the electric cabinets (20) includes at least one electric cabinet (20); At least one row of the electric cabinets (20) has positive poles (21) electrically connected to the same positive pole connection busbar (a1), and at least one row of the electric cabinets (20) has negative poles (22) electrically connected to the same negative pole connection busbar (a2).

4. The energy storage device (100) according to claim 3, characterized in that: The power conducting component (12) comprises a plurality of groups of connecting busbars (12a), each group of connecting busbars (12a) comprises the positive connecting busbar (a1) and the negative connecting busbar (a2), and the plurality of groups of connecting busbars (12a) are arranged in sequence in the second direction (Y); Each row of the electrical cabinets (20) is electrically connected to different groups of the connecting busbars (12a).

5. The energy storage device (100) according to claim 4, characterized in that: In at least two adjacently arranged groups of the connecting busbars (12a), the positive connecting busbars (a1) and the negative connecting busbars (a2) are arranged in parallel or in series.

6. The energy storage device (100) according to claim 5, characterized in that: There are two groups of adjacently arranged connecting busbars (12a), in which at least two of the negative connecting busbars (a2) are adjacently arranged in the second direction (Y), or at least two of the positive connecting busbars (a1) are adjacently arranged.

7. The energy storage device (100) according to claim 5, characterized in that: The power conducting component (12) further comprises a positive transition busbar (12b), and the two positive connection busbars (a1) arranged in parallel or in series are electrically connected via the positive transition busbar (12b); and / or, The power conduction component (12) further comprises a negative transition busbar (12c), and the two negative connection busbars (a2) arranged in parallel or in series are electrically connected via the negative transition busbar (12c).

8. The energy storage device (100) according to claim 7, characterized in that: In at least one row of the electrical cabinets (20), the positive poles of some of the electrical cabinets (20) are electrically connected to the positive transition busbar (12b), and / or the negative poles of some of the electrical cabinets (20) are electrically connected to the negative transition busbar (12c).

9. The energy storage device (100) according to any one of claims 1 to 8, characterized in that: The positive electrode (21) and the negative electrode (22) are located at one end of the electric cabinet (20) close to the electric power conducting component (12) in the third direction (Z); The positive electrode (21) and / or the negative electrode (22) is a cable component.

10. The energy storage device (100) according to claim 9, characterized in that: The electric cabinets (20) are arranged in a plurality of rows, and each row of the electric cabinets (20) includes a plurality of the electric cabinets (20) arranged in sequence in the first direction (X); In at least one row of the electric cabinets (20), the positive poles (21) of the respective electric cabinets (20) are located on the same side of the negative poles (22) thereof in the second direction (Y).

11. The energy storage device (100) according to any one of claims 1 to 8, characterized in that: The energy storage device (100) further comprises a combiner cabinet (30) and a power module (40); the combiner cabinet (30) is electrically connected to the power module (40), and is electrically connected to the electric cabinet (20) via the electric power conduction component (12).

12. The energy storage device (100) according to claim 11, characterized in that: The power conduction component (12) further comprises a positive busbar (12d) and a negative busbar (12e), wherein at least a portion of the positive connection busbar (a1) is electrically connected to the busbar cabinet (30) via the positive busbar (12d), and at least a portion of the negative connection busbar (a2) is electrically connected to the busbar cabinet (30) via the negative busbar (12e).

13. The energy storage device (100) according to any one of claims 1 to 8, characterized in that: In the second direction (Y), the spacing distance between adjacent connecting busbars (12a) is L1, and the value of L1 is 100 mm to 450 mm.

14. The energy storage device (100) according to any one of claims 1 to 8, characterized in that: In the second direction (Y), all the connecting busbars (12a) are spaced apart from the frame (11).

15. An energy storage rack (10), characterized in that: include: A frame (11) is formed with a first accommodation area (Q1) for accommodating an electric cabinet (20); The power conducting component (12) comprises at least two connecting busbars (12a), each connecting busbar (12a) is arranged to extend along a first direction (X), and all the connecting busbars (12a) are arranged side by side and spaced apart along a second direction (Y); The connecting busbar (12a) is arranged on one side of the first accommodating area (Q1) in the third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) are arranged to intersect each other.

16. The energy storage rack (10) according to claim 15, characterized in that: The frame (11) comprises a plurality of the first accommodating areas (Q1), and the plurality of the first accommodating areas (Q1) are arranged side by side along the second direction (Y); The power conducting component (12) comprises a plurality of groups of connecting busbars (12a), each group of connecting busbars (12a) comprising at least two connecting busbars (12a); the plurality of groups of connecting busbars (12a) are arranged in sequence in the second direction (Y); A group of connecting busbars (12a) is arranged on one side of at least one row of the first accommodating areas (Q1) in the third direction (Z).

17. The energy storage rack (10) according to claim 16, characterized in that: Each group of the connecting busbars (12a) comprises a positive connecting busbar (a1) and a negative connecting busbar (a2); In at least two adjacent groups of the connecting busbars (12a), the positive connecting busbars (a1) and the negative connecting busbars (a2) are connected in parallel or in series.

18. The energy storage rack (10) according to claim 16, characterized in that: The frame (11) is also formed with a second accommodating area (Q2) and a third accommodating area (Q3); The second accommodating area (Q2) and the third accommodating area (Q3) are arranged in sequence in the third direction (Z), and are staggered with the plurality of first accommodating areas (Q1) in a plane perpendicular to the third direction (Z).

19. The energy storage rack (10) according to any one of claims 15 to 18, characterized in that: The energy storage rack (10) further comprises an insulating support (14), and at least a portion of the connecting busbar (12a) is supported on the frame (11) via the insulating support (14), and at least a portion of the connecting busbar (12a) is clamped on the insulating support (14).

20. The energy storage rack (10) according to claim 19, characterized in that: The insulating support member (14) comprises an insulator (14f), a first fixing plate (14g) and a second fixing plate (14h); the first fixing plate (14g) and the second fixing plate (14h) are spaced apart to form a clamping space and are jointly arranged at one end of the insulator (14f) in a third direction (Z); the other end of the insulator (14f) in the third direction (Z) is arranged on the frame (11).

21. The energy storage rack (10) according to any one of claims 15 to 18, characterized in that: The energy storage rack (10) further comprises a flange structure (13), wherein the flange structure (13) is arranged at two ends of the frame (11) in the third direction (Z) and protrudes from the frame (11).

22. An energy storage system, characterized in that: Comprising the energy storage device (100) according to any one of claims 1 to 14.

23. The energy storage system according to claim 22, characterized in that: The energy storage system comprises a plurality of the energy storage devices (100), wherein the plurality of the energy storage devices (100) are stacked and arranged in a third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other and are not coplanar.

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