Battery cluster and energy storage system

Abstract

The utility model provides a battery cluster and an energy storage system. The battery cluster comprises an even number of layers of battery packs stacked in the first direction, a cluster total positive cable and a cluster total negative cable. Each layer of battery packs comprises at least two battery packs arranged along a second direction, all the battery packs are connected in series and form a first battery pack and a last battery pack, the first battery pack and the last battery pack are located on the same side of the battery cluster, and the first direction intersects with the second direction. And the cluster total positive cable is led out from one of the first battery pack and the last battery pack, and is electrically connected with a positive connector of the battery pack. And the cluster total positive cable is led out from the other one of the first battery pack and the last battery pack, and is electrically connected with the negative electrode connector of the battery pack.

Description

Technical Field

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

[0002] With the continuous development of power generation technology and the increase in the scale of new energy power generation, energy storage systems have been more and more widely promoted and applied. As a key system structure of energy storage technology, the stable operation of battery clusters is particularly critical.

[0003] Typically, an energy storage system includes a battery cabinet, multiple battery clusters arranged in the battery cabinet, and a high-voltage box for managing the battery packs in the battery cluster. The battery pack includes a box body and a battery cell installed in the box body. Multiple battery packs are stacked vertically (in the height direction of the battery cabinet) in the battery cabinet through an installation structure to form a battery cluster. The high-voltage box is arranged at the top, bottom or middle of the battery cluster. After the battery packs in each battery cluster are connected in series, they are led to the high-voltage box by the cluster total positive high-voltage cable and the cluster total negative high-voltage cable. After passing through the control unit of the high-voltage box, they are led out from the high-voltage box and led to the bus through the bus total positive cable and the bus total negative cable. Then the bus is electrically connected to the energy storage inverter on the AC side.

[0004] Since the battery packs in the battery cluster are vertically stacked and connected in series, and the series electrical connection design will cause one of the cluster total positive cable and the cluster total negative cable to be led from the battery pack at the top layer of the battery cluster to the high voltage box, and the other to be led from the battery pack at the bottom layer of the battery cluster to the high voltage box. This will cause the cluster total positive cable and / or the cluster total negative cable to be very long, for example, the length is close to the height of the battery cabinet, resulting in a large amount of cables used, increased costs and greater heat generation. Utility Model Content

[0005] In view of the above problems, the present application provides a battery cluster and energy storage system, which can at least solve the problem that the total positive cable and / or the total negative cable of the cluster is forced to be longer, resulting in large cable usage, increased cost and high heat generation.

[0006] In a first aspect, the present application provides a battery cluster. The battery cluster includes: an even number of layers of battery packs stacked along a first direction, a cluster total positive cable, and a cluster total negative cable. Each layer of battery packs includes at least two battery packs arranged along a second direction, all of the battery packs are connected in series, and form a battery pack at the first position and a battery pack at the last position, the battery pack at the first position and the battery pack at the last position are located on the same side of the battery cluster, and the first direction intersects with the second direction. The cluster total positive cable is led out from one of the battery pack at the first position and the battery pack at the last position, and is electrically connected to the positive terminal of the battery pack. The cluster total positive cable is led out from the other of the battery pack at the first position and the battery pack at the last position, and is electrically connected to the negative terminal of the battery pack.

[0007] In the above technical solution, the battery cluster is stacked with an even number of layers of battery packs along the first direction, and each layer of battery packs includes at least two battery packs arranged along the second direction. All battery packs are connected in series, and the first battery pack and the last battery pack are located on the same side of the battery cluster, so that the cluster total positive cable and the cluster total negative cable electrically connected to the first battery pack and the last battery pack respectively are also on the same side of the battery cluster, and the cluster total positive cable and the cluster total negative cable can be directly electrically connected to the high-voltage box, avoiding the traditional solution of battery pack stacking resulting in the cluster total positive cable and the cluster total negative cable of the battery cluster being on different sides and having to use cables as long as the height of the battery cluster to electrically connect the battery cluster to the high-voltage box, reducing the length of the cluster total (positive / negative) cables, saving the use of the cluster total (positive / negative) cables, and reducing costs.

[0008] As an optional technical solution of the present application, the even-layer battery pack includes a top-layer battery pack and a bottom-layer battery pack. In the second direction, the positive and negative electrode arrangement of the battery pack on the top layer is opposite to that of the battery pack on the bottom layer.

[0009] In the above technical solution, in the second direction, the arrangement of the positive and negative electrodes of the battery packs on the top layer is opposite to that of the battery packs on the bottom layer, which can facilitate the series connection of all battery packs.

[0010] As an optional technical solution of the present application, the battery cluster further includes a power cable, and the power cable is used to connect all the battery packs in series.

[0011] In the above technical solution, the setting of the power cables can facilitate the series connection of all battery packs.

[0012] As an optional technical solution of the present application, each battery pack is provided with a high-voltage connector on opposite sides in the second direction; in the second direction, the opposite ends of the power cable are respectively connected to the high-voltage connectors on different sides of the two adjacent battery packs; in the first direction, the opposite ends of the power cable used to connect the two outermost battery packs of two adjacent layers in series are respectively connected to the high-voltage connectors on the same side of the two outermost battery packs.

[0013] In the above technical solution, in the second direction, the opposite ends of the power cable are respectively connected to the high-voltage connectors on different sides of two adjacent battery packs; and in the first direction, the opposite ends of the power cable used for connecting the two outermost battery packs in series are respectively connected to the high-voltage connectors on the same side of the two outermost battery packs, so that all battery packs can be connected in series by using shorter power cables, which saves the use of power cables and further reduces the cost of the energy storage system.

[0014] As an optional technical solution of the present application, the battery pack includes a box, battery cells arranged in the box, and a slave controller arranged in the box, and the slave controller is used to control the battery cells; the battery cluster also includes a signal cable, and the signal cable is used to electrically connect the slave controllers of all the battery packs.

[0015] In the above technical solution, the arrangement of the signal cable can facilitate the electrical connection of all slave controllers from head to tail.

[0016] As an optional technical solution of the present application, each battery pack is provided with a low-voltage connector on opposite sides in the second direction; in the second direction, the opposite ends of the signal cable are respectively connected to the low-voltage connectors on different sides of the two adjacent battery packs; in the first direction, the opposite ends of the signal cable used to connect the two outermost battery packs of two adjacent layers are respectively connected to the low-voltage connectors on the same side of the two outermost battery packs.

[0017] In the above technical solution, in the second direction, the opposite ends of the signal cable are respectively connected to the low-voltage connectors on different sides of the two adjacent battery packs; and in the first direction, the opposite ends of the signal cable used to connect the two outermost battery packs of two adjacent layers are respectively connected to the low-voltage connectors on the same side of the two outermost battery packs. This allows the use of shorter signal cables to achieve end-to-end electrical connection from the controller in all battery packs, saving the use of signal cables and further reducing the cost of the energy storage system.

[0018] As an optional technical solution of the present application, each battery pack is provided with a high-voltage connector on opposite sides in the second direction, one end of the cluster total positive cable is electrically connected to one of the high-voltage connector of the first battery pack and the high-voltage connector of the last battery pack, and one end of the cluster total negative cable is electrically connected to the other of the high-voltage connector of the first battery pack and the high-voltage connector of the last battery pack.

[0019] In the above technical solution, the setting of the cluster total positive cable and the cluster total negative cable can aggregate the signals of all battery packs connected in series in a battery cluster and lead them to the outside, such as a high-voltage box. After the control unit in the high-voltage box obtains these signals, it can control the charging and discharging of the battery packs in the battery cluster according to these signals, which is very convenient.

[0020] As an optional technical solution of the present application, the battery pack is provided with a media inlet connector, a media outlet connector and a refrigerant channel connecting the media inlet connector and the media outlet connector. The media inlet connector of the battery pack is used to supply refrigerant to enter the refrigerant channel, and the media outlet connector of the battery pack is used to supply refrigerant carrying heat to flow out of the refrigerant channel from the refrigerant channel to the outside of the battery pack.

[0021] In the above technical solution, the external refrigerant with a lower temperature can enter the refrigerant channel through the refrigerant inlet connector of the battery pack and flow in the refrigerant channel to take away the heat generated by the battery pack. The refrigerant carrying the heat can flow out to the outside of the battery pack through the refrigerant outlet connector of the battery pack to achieve heat dissipation of the battery pack, thereby ensuring that the battery cluster in the battery pack can work normally.

[0022] In a second aspect, the present application provides an energy storage system, the energy storage system comprising: a battery cluster and a high voltage box as described in any of the above technical solutions. The cluster total positive cable and the cluster total negative cable are both electrically connected to the high voltage box.

[0023] In the energy storage system of the above technical solution, the battery cluster is stacked in an even number of layers of battery packs along a first direction, each layer of battery packs includes at least two battery packs arranged along a second direction, all the battery packs are connected in series, and the first battery pack and the last battery pack are located on the same side of the battery cluster, so that the cluster total positive cable and the cluster total negative cable electrically connected to the first battery pack and the last battery pack respectively are also on the same side of the battery cluster, and the cluster total positive cable and the cluster total negative cable can be directly electrically connected to the high-voltage box, avoiding the traditional solution of battery pack stacking resulting in the cluster total positive cable and the cluster total negative cable of the battery cluster being on different sides and having to use cables as long as the height of the battery cluster to electrically connect the battery cluster to the high-voltage box, reducing the length of the cluster total (positive / negative) cables, saving the use of the cluster total (positive / negative) cables, and reducing costs.

[0024] As an optional technical solution of the present application, the battery pack includes a box, battery cells arranged in the box and a slave controller arranged in the box, and the slave controller is used to control the battery cells; the battery cluster also includes a signal cable, and the signal cable is used to electrically connect the slave controllers of all the battery packs from head to tail, and the control unit in the high-voltage box is electrically connected to the signal cable connecting the battery pack in the first position and the battery pack in the last position.

[0025] In the above technical solution, the provision of signal cables can conveniently electrically connect all slave controllers from head to tail and then electrically connect them to the high-voltage box to form a daisy chain communication connection, thereby saving the use of signal cables and further reducing the cost of the energy storage system.

[0026] As an optional technical solution of the present application, each battery pack is provided with a low-voltage connector on opposite sides in the second direction; in the second direction, the opposite ends of the signal cable are respectively connected to the low-voltage connectors on different sides of the two adjacent battery packs; in the first direction, the opposite ends of the signal cable used to connect the two outermost battery packs of two adjacent layers are respectively connected to the low-voltage connectors on the same side of the two outermost battery packs.

[0027] In the above technical solution, in the second direction, the opposite ends of the signal cable are respectively connected to the low-voltage connectors on different sides of the two adjacent battery packs; and in the first direction, the opposite ends of the signal cable used to connect the two outermost battery packs of two adjacent layers are respectively connected to the low-voltage connectors on the same side of the two outermost battery packs. This allows the use of shorter signal cables to achieve end-to-end electrical connection from the controller in all battery packs, saving the use of signal cables and further reducing the cost of the energy storage system.

[0028] As an optional technical solution of the present application, each battery pack is respectively provided with a high-voltage connector on opposite sides in the second direction, one end of the cluster total positive cable is electrically connected to one of the high-voltage connector of the first battery pack and the high-voltage connector of the last battery pack, and the other end of the cluster total positive cable is electrically connected to the high-voltage box; one end of the cluster total negative cable is electrically connected to the other of the high-voltage connector of the first battery pack and the high-voltage connector of the last battery pack, and the other end of the cluster total negative cable is electrically connected to the high-voltage box.

[0029] In the above technical solution, the setting of the cluster total positive cable and the cluster total negative cable can aggregate the signals of all battery packs connected in series in a battery cluster and lead them to the high-voltage box. After the control unit in the high-voltage box obtains these signals, it can control the charging and discharging of the battery packs in the battery cluster according to these signals, which is very convenient.

[0030] As an optional technical solution of the present application, the battery cluster includes at least two, the high-voltage boxes include at least two, each battery cluster corresponds to one high-voltage box, in the same battery cluster, the cluster total positive cable and the cluster total negative cable are both electrically connected to the corresponding high-voltage box, and at least two of the high-voltage boxes are located on one side of the battery pack at the first position and the battery pack at the last position of the battery cluster.

[0031] In the above technical solution, at least two high-voltage boxes are located on the side where the first battery pack and the last battery pack of the battery cluster are located, that is, at least two high-voltage boxes are located on the convergence side of the energy storage system, which avoids the situation in the traditional solution where different high-voltage boxes corresponding to different battery clusters are at a long distance from the convergence position, and a longer convergence cable has to be used to electrically connect the high-voltage boxes to the convergence side, thereby saving the use of convergence cables and reducing costs.

[0032] As an optional technical solution of the present application, the energy storage system further includes a bus total positive cable and a bus total negative cable. Each of the bus total positive cables corresponds to one of the high-voltage boxes, and one end of the bus total positive cable is electrically connected to the positive pole of the corresponding high-voltage box. Each of the bus total negative cables corresponds to one of the high-voltage boxes, and one end of the bus total negative cable is electrically connected to the negative pole of the corresponding high-voltage box.

[0033] In the above technical solution, the setting of the bus total positive cable and the bus total negative cable can lead the signal of the high-voltage box to the energy storage inverter of the bus measurement. The energy storage inverter can control the charging and discharging process of the battery cluster, perform AC / DC conversion, and directly supply power to the AC load in the absence of a power grid.

[0034] As an optional technical solution of the present application, the battery pack is provided with a media inlet connector, a media outlet connector and a refrigerant channel connecting the media inlet connector of the battery pack and the media outlet connector of the battery pack; the energy storage system also includes a refrigerant assembly, and the refrigerant assembly is connected to the media channel through the media inlet connector of the battery pack and the media outlet connector of the battery pack to form a heat dissipation channel, and the heat dissipation channel is used for circulating refrigerant to dissipate heat from the battery pack.

[0035] In the above technical solution, the refrigerant assembly is connected with the battery pack's media inlet connector, the battery pack's media outlet connector and the refrigerant channel to form a heat dissipation channel. The refrigerant provided by the refrigerant assembly circulates in the heat dissipation channel to achieve heat dissipation for the battery pack, thereby ensuring that the battery cluster in the battery pack can work normally.

[0036] As an optional technical solution of the present application, the battery cluster forms multiple columns of battery packs in the first direction, and the media inlet connector of the battery pack and the media outlet connector of the battery pack are respectively located on opposite sides of the battery pack in the second direction; each column of the battery packs corresponds to one refrigerant component, and the refrigerant component includes a refrigerant unit, a refrigerant inlet assembly and a refrigerant outlet assembly, and the refrigerant unit is respectively provided with a media inlet connector and a media outlet connector on opposite sides of the second direction, and the refrigerant unit is located at the top, bottom or any position between the top and the bottom of the battery pack in the corresponding column, the refrigerant inlet assembly and the refrigerant outlet assembly are respectively arranged on opposite sides of the battery pack in the corresponding column in the second direction, the refrigerant inlet assembly is connected to the media outlet connector of the refrigerant unit and the media inlet connectors of all the battery packs in the corresponding column, and the refrigerant outlet assembly is connected to the media inlet connector of the refrigerant unit and the media outlet connectors of all the battery packs in the corresponding column.

[0037] In the above technical solution, the arrangement of the refrigerant inlet assembly and the refrigerant outlet assembly can realize the circulation of the refrigerant in the heat dissipation channel, thereby realizing the heat dissipation of the battery pack, thereby ensuring that the battery cluster in the battery pack can work normally.

[0038] As an optional technical solution of the present application, the refrigerant inlet assembly and / or the refrigerant outlet assembly includes at least two primary pipelines, at least two secondary pipelines and a connecting pipeline. At least two of the primary pipelines are arranged in sequence along the first direction, and two adjacent primary pipelines are connected through a first joint. The primary pipeline at the outermost end in the first direction is sealed by the first joint. Each of the secondary pipelines corresponds to one first joint, one battery pack and one second joint. One end of the secondary pipeline is connected to the corresponding first joint, and the other end is connected to the corresponding inlet joint of the battery pack or the outlet joint of the battery pack through the second joint. One end of the connecting pipeline is connected to the other outermost primary pipeline in the first direction, and the other end of the connecting pipeline is connected to the inlet joint of the refrigerant unit or the outlet joint of the refrigerant unit through a third joint.

[0039] In the above technical solution, the secondary pipeline is connected to the primary pipeline through the first joint, connected to the battery pack through the second joint, and the connecting pipeline is connected to the refrigerant unit through the third joint, which can realize the rapid disassembly and assembly of the refrigerant inlet assembly and / or the refrigerant outlet assembly and the battery pack, as well as the rapid disassembly and assembly of the refrigerant inlet assembly and / or the refrigerant outlet assembly and the refrigerant unit.

[0040] 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

[0041] 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:

[0042] Figure 1 A schematic diagram of the three-dimensional structure of an energy storage system according to some embodiments of the present application;

[0043] Figure 2 for Figure 1 The schematic diagram of the planar structure of the energy storage system shown in the figure after removing the cover;

[0044] Figure 3 for Figure 1 The three-dimensional structural diagram of the energy storage system shown is shown without the battery cabinet;

[0045] Figure 4 for Figure 3 A schematic diagram of the planar structure of the energy storage system shown;

[0046] Figure 5 for Figure 1 A three-dimensional schematic diagram of a partial structure of the energy storage system shown;

[0047] Figure 6 for Figure 5 A schematic plan view of a partial structure of an energy storage system shown;

[0048] Figure 7 for Figure 1 A schematic diagram of the three-dimensional structure of a battery pack in the energy storage system shown;

[0049] Figure 8 for Figure 1 A schematic diagram of the three-dimensional structure of the refrigerant inlet assembly and the refrigerant outlet assembly in the energy storage system shown;

[0050] Fig. 9 for Figure 1 The schematic diagram of the planar structure of the refrigerant inlet assembly and the refrigerant outlet assembly in the energy storage system shown.

[0051] The reference numerals in the specific implementation manner are as follows:

[0052] Energy storage system 1000;

[0053] Battery cluster 100, battery pack 10, first side 101, second side 103, box 11, battery cell 12, slave controller 13, high voltage connector 14, low voltage connector 16, inlet connector 17, outlet connector 18; first direction X, second direction Y; cluster total positive cable 30; cluster total negative cable 50; power cable 70; signal cable 90;

[0054] High voltage box 300, box body 301, control unit 303;

[0055] Refrigerant assembly 500, refrigerant unit 501, installation box 5011, refrigerant outlet joint 5013, refrigerant inlet joint 5015, refrigerant inlet assembly 503A, refrigerant outlet assembly 503B, primary pipeline 5031, first joint 5032, secondary pipeline 5033, second joint 5034, connecting pipeline 5035, third joint 5036;

[0056] Battery cabinet 600, cabinet body 601, cover body 603, accommodating cavity 605;

[0057] The main positive cable is 700;

[0058] The main negative cable 900 is connected. DETAILED DESCRIPTION

[0059] The following detailed description of the implementation of the technical solution of the present application is provided in conjunction with the accompanying drawings. The following implementation is only used to more clearly illustrate the technical solution of the present application, and is therefore only used as an example, and cannot be used to limit the scope of protection of the present application.

[0060] 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 implementation methods 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.

[0061] In the description of the implementation methods of this application, the technical terms "first", "second", etc. 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 implementation methods of this application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0062] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment 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.

[0063] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of 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, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0064] In the description of the embodiments of the present application, 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).

[0065] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "liquid level", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do 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 should not be understood as a limitation on the embodiments of the present application.

[0066] In the description of the implementation methods of the present application, unless otherwise clearly stipulated and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; 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.

[0067] See also Figure 1 The present application provides an energy storage system 1000 , which includes a battery cabinet 600 , a battery cluster 100 , and a high-voltage box 300 . The battery cluster 100 is disposed in the battery cabinet 600 , and the high-voltage box 300 is disposed outside the battery cabinet 600 .

[0068] Among them, a rectangular coordinate system is established with the length, width and height of the battery cabinet 600 as three axes. In some embodiments, the first direction X is the height direction of the battery cabinet 600, the second direction Y is the length direction of the battery cabinet 600, and the third direction Z is the width direction of the battery cabinet 600. In other embodiments, the first direction X is the length direction of the battery cabinet 600, the second direction Y is the height direction of the battery cabinet 600, and the third direction Z is the width direction of the battery cabinet 600. In still other embodiments, the first direction X is the width direction of the battery cabinet 600, the second direction Y is the length direction of the battery cabinet 600, and the third direction Z is the height direction of the battery cabinet 600. This application only takes the example that the first direction X is the height direction of the battery cabinet 600, the second direction Y is the length direction of the battery cabinet 600, and the third direction Z is the width direction of the battery cabinet 600 for explanation, as Figure 1 shown.

[0069] Specifically, please combine Figure 2The battery cabinet 600 is a cabinet structure for placing the battery pack 10. The cross-section of the battery cabinet 600 (the plane intercepted by the XY plane) can be, but is not limited to, circular, elliptical, square or other polygonal. The material of the battery cabinet 600 includes, but is not limited to, metal or non-metal, wherein metal includes aluminum, iron, steel, aluminum alloy or iron alloy, etc., and non-metal includes, but is not limited to plastic, etc. In the present application, the cross-section of the battery cabinet 600 is square, so it can be easily integrated into the energy storage system 1000. The material of the battery cabinet 600 is aluminum alloy, so that while ensuring the rigidity, it can also make the energy storage system 1000 lighter and easier to transport.

[0070] The battery cabinet 600 includes a cabinet body 601 and a cover body 603. The cabinet body 601 and the cover body 603 are combined to enclose a receiving cavity 605, and the battery cluster 100 is received in the receiving cavity 605. Among them, the cabinet body 601 is a component in the battery cabinet 600 that loads and supports the battery pack 10. One end of the cabinet body 601 is closed, and the other end is provided with an opening, and the opening is used for the battery pack 10 to be loaded into the receiving cavity 605. The cover body 603 is a component in the battery cabinet 600 that covers the opening. The connection between the cabinet body 601 and the cover body 603 can be a detachable connection or a non-detachable connection. The detachable connection includes but is not limited to a screw connection, a snap connection, or a combination of a screw connection and a snap connection. The non-detachable connection includes but is not limited to a gluing connection, welding, or a combination of a gluing connection and welding. In the present application, the cabinet body 601 and the cover body 603 are detachably connected.

[0071] In addition, when the battery cabinet 600 includes a cabinet body 601 and a cover body 603, the battery cabinet 600 may not be limited to being made of one material. For example, the cabinet body 601 and the cover body 603 may be made of the same material, which is aluminum alloy. The battery cabinet 600 may also be made of different materials for different components. For example, the cabinet body 601 is made of a metal material, and the cover body 603 is made of plastic. Of course, the material of the cabinet body 601 and the material of the cover body 603 may also be a combination of other different materials, which are not listed here one by one.

[0072] Please also read Figure 3 and Figure 7The battery cluster 100 is an assembly composed of multiple energy storage battery packs 10, which can store and release energy by connecting and controlling the battery cells 12 in the battery packs 10. The functions of the battery cluster 100 include but are not limited to energy storage, energy scheduling and energy storage power stations. Specifically, in some applications, the battery cluster 100 can convert electrical energy into chemical energy for storage to meet the electricity demand during peak energy demand periods, thereby playing a role in energy storage. In other applications, the battery cluster 100 can flexibly adjust the supply and demand of electrical energy, achieve energy balance and scheduling, and improve energy utilization, thereby playing a role in energy scheduling. In some other applications, the battery cluster 100 can form an energy storage power station to store and schedule energy on a large scale, provide a reliable energy supply, and thus play the role of an energy storage power station.

[0073] In the energy storage system 1000, the number of battery clusters 100 may be any number, for example, one, two, three, four or more battery clusters 100. In the present application, only the energy storage system 1000 including four battery clusters 100 is used as an example for description.

[0074] Specifically, see Figure 5 In the embodiment of the present application, the battery cluster 100 includes: an even number of layers of battery packs 10 stacked along a first direction X, a cluster total positive cable 30, and a cluster total negative cable 50. Each layer of battery packs 10 includes at least two battery packs 10 arranged along a second direction Y, and all battery packs 10 are connected in series to form a first battery pack 10 and a last battery pack 10. The first battery pack 10 and the last battery pack 10 are located on the same side of the battery cluster 100, and the first direction X intersects with the second direction Y. The cluster total positive cable 30 is led out from one of the first battery pack 10 and the last battery pack 10, and is electrically connected to the positive terminal of the battery pack 10. The cluster total positive cable 30 is led out from the other of the first battery pack 10 and the last battery pack 10, and is electrically connected to the negative terminal of the battery pack 10.

[0075] Please combine Figure 7The battery pack 10 is a collection of multiple energy-storing battery cells 12, and the battery cell 12 is the smallest unit for storing and releasing electrical energy. The collection of battery cells 12 can achieve energy storage and release by connecting and controlling the battery cells 12. In the battery pack 10, there are multiple battery cells 12 (only 4 are shown in the figure), and the multiple battery cells 12 can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 12 are both connected in series and in parallel. Multiple battery cells 12 can be directly connected in series, in parallel, or in mixed connection, and then the whole composed of multiple battery cells 12 is accommodated in a carrier (box 11 of the battery pack 10). The battery pack 10 may also include other structures. For example, the battery pack 10 may also include a confluence component (not shown) for realizing electrical connection between multiple battery cells 12. It can be understood that the number of battery cells 12 in the battery pack 10 can be adaptively adjusted according to the application scenario and capacity of the battery cluster 100.

[0076] The even-numbered battery packs 10 may be two-layer battery packs, four-layer battery packs, six-layer battery packs, eight-layer battery packs 10 or a greater number of even-numbered layers. In the present application, the battery cluster 100 includes two layers of battery packs 10 stacked along the first direction X, and each layer of battery packs 10 includes four battery packs 10 arranged along the second direction Y, that is, each battery cluster 100 includes eight battery packs 10, such as Figure 5 and Figure 6 As shown, they are the 1st to 8th battery packs respectively. All battery packs 10 are connected in series to form a first battery pack 10 and a last battery pack 10. The first battery pack 10 is the first battery pack 10 in the series battery packs 10, and the last battery pack 10 is the last battery pack 10 in the series battery packs 10; or, the first battery pack 10 is the last battery pack 10 in the series battery packs 10, and the last battery pack 10 is the first battery pack 10 in the series battery packs 10. Figure 6 As shown, the first to eighth battery packs are electrically connected in series in sequence, the first battery pack is the first battery pack 10, and the eighth battery pack is the last battery pack 10; or, the eighth battery pack is the first battery pack 10, and the first battery pack is the last battery pack 10. In the present application, only the first battery pack is used as the first battery pack 10 and the eighth battery pack is the last battery pack 10 as an example for explanation. The first battery pack 10 and the last battery pack 10 are located on the same side of the battery cluster 100, including: the first battery pack 10 and the last battery pack 10 are both located on the left side of the battery cluster 100 in the second direction Y, such as Figure 6 or, the first battery pack 10 and the last battery pack 10 are both located on the right side of the battery cluster 100 in the second direction Y. This application only takes the example that the first battery pack 10 and the last battery pack 10 are both located on the left side of the battery cluster 100 for explanation.

[0077] It should be noted that, when the first direction X is the length direction of the battery cabinet 600, the second direction Y is the height direction of the battery cabinet 600, and the third direction Z is the width direction of the battery cabinet 600, the battery pack 10 at the first position and the battery pack 10 at the last position are located on the same side of the battery cluster 100, including: the battery pack 10 at the first position and the battery pack 10 at the last position are both located on the upper side of the battery cluster 100 in the second direction Y; or, the battery pack 10 at the first position and the battery pack 10 at the last position are both located on the lower side of the battery cluster 100 in the second direction Y. When the first direction X is the width direction of the battery cabinet 600, the second direction Y is the length direction of the battery cabinet 600, and the third direction Z is the height direction of the battery cabinet 600, the battery pack 10 at the first position and the battery pack 10 at the last position are located on the same side of the battery cluster 100, including: the battery pack 10 at the first position and the battery pack 10 at the last position are both located on the left side of the battery cluster 100 in the second direction Y; or, the battery pack 10 at the first position and the battery pack 10 at the last position are both located on the right side of the battery cluster 100 in the second direction Y.

[0078] See also Figure 5 The cluster total positive cable 30 is a cable that is led out from the positive terminal of the battery cluster 100 and is electrically connected to the positive terminal of the high-voltage box 300. The cluster total negative cable 50 is a cable that is led out from the negative terminal of the battery cluster 100 and is electrically connected to the negative terminal of the high-voltage box 300. The cluster total positive cable 30 is led out from one of the first battery pack 10 and the last battery pack 10 and is electrically connected to the positive terminal of the battery pack 10. The cluster total positive cable 30 is led out from the other of the first battery pack 10 and the last battery pack 10 and is electrically connected to the negative terminal of the battery pack 10. It can be: the cluster total positive cable 30 is led out from the first battery pack 10 (the first battery pack) and is electrically connected to the positive terminal of the first battery pack 10 (the first battery pack). The cluster total negative cable 50 is led out from the last battery pack 10 (the eighth battery pack) and is electrically connected to the negative terminal of the last battery pack 10 (the eighth battery pack). Alternatively, the cluster total positive cable 30 is led out from the last battery pack 10 (eighth battery pack) and electrically connected to the positive terminal of the last battery pack 10 (eighth battery pack). The cluster total negative cable 50 is led out from the first battery pack 10 (first battery pack) and electrically connected to the negative terminal of the first battery pack 10 (first battery pack).

[0079] The high voltage box 300 is a device electrically connected to the battery cluster 100 and used to control the charging and discharging of the battery cells 12 in the battery pack 10 of the battery cluster 100. In some embodiments, each high voltage box 300 may include a main circuit (not shown) for controlling the charging or discharging of the battery cells 12 and a pre-charging circuit (not shown) connected to the main circuit for limiting the current when the battery cells 12 are discharged. The energy storage system 1000 limits the current through the pre-charging circuit, so that each battery cluster 100 does not flow, reducing the impact of large current on the battery cells 12.

[0080] In some other embodiments, the high voltage box 300 is electrically connected to the battery cluster 100 through the cluster total positive cable 30 and the cluster total negative cable 50. Specifically, one end of the cluster total positive cable 30 is electrically connected to the positive terminal of the first battery pack 10 (the first battery pack), and the other end of the cluster total positive cable 30 is electrically connected to the positive terminal of the high voltage box 300. One end of the cluster total negative cable 50 is electrically connected to the negative terminal of the last battery pack 10 (the eighth battery pack), and the other end of the cluster total negative cable 50 is electrically connected to the negative terminal of the high voltage box 300.

[0081] In addition, in the energy storage system 1000, the number of high-voltage boxes 300 can be any number, for example, the number of high-voltage boxes 300 is one, two, three, four or more. Usually, the number of high-voltage boxes 300 is the same as the number of battery clusters 100, and each battery cluster 100 corresponds to one high-voltage box 300. In this application, only the energy storage system 1000 includes four high-voltage boxes 300, and the four high-voltage boxes 300 correspond to one battery cluster 100, respectively, for explanation.

[0082] In the energy storage system 1000 of the present application, the battery cluster 100 is stacked along the first direction X to arrange an even number of layers of battery packs 10, each layer of battery packs 10 includes at least two battery packs 10 arranged along the second direction Y, all the battery packs 10 are connected in series, and the first battery pack 10 and the last battery pack 10 are located on the same side of the battery cluster 100, so that the cluster total positive cable 30 and the cluster total negative cable 50 electrically connected to the first battery pack 10 and the last battery pack 10 respectively are also on the same side of the battery cluster 100, and the cluster total positive cable 30 and the cluster total negative cable 50 can be directly electrically connected to the high-voltage box 300, avoiding the traditional solution of battery pack stacking resulting in the cluster total positive cable and the cluster total negative cable of the battery cluster being on different sides and having to use cables with the same length as the height of the battery cluster to electrically connect the battery cluster to the high-voltage box, reducing the length of the cluster total (positive / negative) cables, saving the use of the cluster total (positive / negative) cables, and reducing costs. At the same time, since the total (positive / negative) cables of the cluster are reduced, the line resistance of the total (positive / negative) cables of the cluster is reduced, and the heat generated by the total (positive / negative) cables of the cluster is reduced, the energy consumption of the energy storage system 1000 is reduced, and the energy utilization rate of the energy storage system 1000 is increased. In addition, the total (positive / negative) cables of the cluster are reduced, which reduces the space occupied by the total (positive / negative) cables of the cluster, and there is no need to additionally fix the total (positive / negative) cables of the cluster, which further reduces the cost.

[0083] See also Figure 5 and Figure 6 In some embodiments, the even-numbered battery pack 10 includes a top-layer battery pack 10 and a bottom-layer battery pack 10. In the second direction Y, the positive and negative electrode arrangement of the top-layer battery pack 10 is opposite to the positive and negative electrode arrangement of the bottom-layer battery pack 10.

[0084] In the present application, in the two-layer battery pack 10, the first-layer battery pack 10 is the top-layer battery pack 10, and the second-layer battery pack 10 is the bottom-layer battery pack 10. The first-layer battery pack 10 includes the first to fourth battery packs, and the second-layer battery pack 10 includes the fifth to eighth battery packs. In the second direction Y, the positive and negative poles of the first to fourth battery packs are arranged with the positive pole on the left and the negative pole on the right, and the positive and negative poles of the fifth to eighth battery packs are arranged with the negative pole on the left and the positive pole on the right, that is, the positive and negative poles of the first to fourth battery packs are arranged opposite to the positive and negative poles of the fifth to eighth battery packs.

[0085] Of course, in another example, in the second direction Y, the positive and negative poles of the 1st to 4th battery packs are arranged with the negative pole on the left and the positive pole on the right, and the positive and negative poles of the 5th to 8th battery packs are arranged with the positive pole on the left and the negative pole on the right. At this time, the positive and negative poles of the 1st to 4th battery packs are still opposite to those of the 5th to 8th battery packs.

[0086] In the above technical solution, in the second direction Y, the positive and negative electrode arrangement of the battery pack 10 on the top layer is opposite to the positive and negative electrode arrangement of the battery pack 10 on the bottom layer, which can facilitate the series connection of all battery packs 10.

[0087] See also Figure 5 and Figure 6 Furthermore, the battery cluster 100 may further include a power cable 70, which is used to connect all the battery packs 10 in series. The provision of the power cable 70 can facilitate the series connection of all the battery packs 10.

[0088] Specifically, each battery pack 10 is provided with a high-voltage connector 14 on opposite sides in the second direction Y. In the second direction Y, the opposite ends of the power cable 70 are respectively connected to the high-voltage connectors 14 on different sides of two adjacent battery packs 10; in the first direction X, the opposite ends of the power cable 70 used for connecting the two outermost battery packs 10 in series in two adjacent layers are respectively connected to the high-voltage connectors 14 on the same side of the two outermost battery packs 10.

[0089] More specifically, please combine Figure 7 , each battery pack 10 includes a first side 101 and a second side 103 opposite to each other in the second direction Y, and a high-voltage connector 14 is provided on the first side 101 of the battery pack 10 and the second side 103 of the battery pack 10, respectively. In two battery packs 10 adjacent to each other in the second direction Y (for example, the second battery pack and the third battery pack), one end of the power cable 70 is connected to the high-voltage connector 14 on the first side 101 of one of the battery packs 10 (the third battery pack), and the other end of the power cable 70 is connected to the high-voltage connector 14 on the second side 103 of the other battery pack 10 (the second battery pack). In the first direction X, in the two outermost battery packs 10 of two adjacent layers (for example, the fourth battery pack and the fifth battery pack), one end of the power cable 70 is connected to the high-voltage connector 14 on the second side 103 of one of the battery packs 10 (the fourth battery pack), and the other end of the power cable 70 is connected to the high-voltage connector 14 on the second side 103 of the other battery pack 10 (the fifth battery pack).

[0090] In the above technical solution, in the second direction Y, the opposite ends of the power cable 70 are respectively connected to the high-voltage connectors 14 on different sides of the two adjacent battery packs 10; and in the first direction X, the opposite ends of the power cable 70 used for connecting the two outermost battery packs 10 in series are respectively connected to the high-voltage connectors 14 on the same side of the two outermost battery packs 10. A shorter power cable 70 can be used to connect all battery packs 10 in series, saving the use of power cables 70 and further reducing the cost of the energy storage system 1000. At the same time, due to the reduction of power cables 70, the line resistance of the power cables 70 is reduced, and the heat generated by the power cables 70 is reduced, so that the energy consumption of the energy storage system 1000 is reduced, and the energy utilization rate of the energy storage system 1000 is increased. In addition, the reduction of power cables 70 reduces the space occupied by the power cables 70, and there is no need to additionally fix the power cables 70, which further reduces the cost of the energy storage system 1000.

[0091] See also Figure 7 The battery pack 10 includes a box body 11, a battery cell 12 disposed in the box body 11, and a slave controller 13 disposed in the box body 11, and the slave controller 13 is used to control the battery cell 12. Figure 5 and Figure 6 The battery cluster 100 may further include a signal cable 90, which is used to electrically connect the slave controllers 13 of all battery packs 10. The high-voltage box 300 includes a box body 301 and a control unit 303 disposed in the box body 301. The control unit 303 in the high-voltage box 300 is electrically connected to the signal cable 90 connecting the first battery pack 10 and the last battery pack 10. The provision of the signal cable 90 can facilitate the electrical connection of all slave controllers 13 from head to tail, and then electrically connected to the high-voltage box 300, forming a daisy chain communication connection.

[0092] Specifically, each battery pack 10 is provided with a low-voltage connector 16 on opposite sides in the second direction Y. In the second direction Y, the opposite ends of the signal cable 90 are respectively connected to the low-voltage connectors 16 on different sides of two adjacent battery packs 10; in the first direction X, the opposite ends of the signal cable 90 used to connect the two outermost battery packs 10 of two adjacent layers are respectively connected to the low-voltage connectors 16 on the same side of the two outermost battery packs 10.

[0093] More specifically, a low voltage connector 16 is provided on the first side 101 of the battery pack 10 and the second side 103 of the battery pack 10, respectively. In two battery packs 10 adjacent to each other in the second direction Y (e.g., the second battery pack and the third battery pack), one end of the signal cable 90 is connected to the low voltage connector 16 on the first side 101 of one of the battery packs 10 (the third battery pack), and the other end of the signal cable 90 is connected to the low voltage connector 16 on the second side 103 of the other battery pack 10 (the second battery pack). In the first direction X, for connecting two battery packs 10 at the outermost ends of two adjacent layers (e.g., the fourth battery pack and the fifth battery pack), one end of the signal cable 90 is connected to the low voltage connector 16 on the second side 103 of one of the battery packs 10 (the fourth battery pack), and the other end of the signal cable 90 is connected to the low voltage connector 16 on the second side 103 of the other battery pack 10 (the fifth battery pack). At this time, the slave controller 13 in the first battery pack to the slave controller 13 in the eighth battery pack are electrically connected end to end through the signal cable 90, and the slave controller 13 in the first battery pack and the slave controller 13 in the eighth battery pack are electrically connected to the high-voltage box 300 through the signal cable 90 to form a daisy chain communication connection. In this way, the first signal of the slave controller 13 in the first battery pack passes through the second battery pack, the third battery pack, the fourth battery pack, the fifth battery pack, the sixth battery pack, the seventh battery pack and the eighth battery pack in sequence and finally reaches the high-voltage box 300; the second signal of the slave controller 13 in the second battery pack passes through the third battery pack, the fourth battery pack, the fifth battery pack, the sixth battery pack, the seventh battery pack and the eighth battery pack in sequence and finally reaches the high-voltage box 300; the third signal of the slave controller 13 in the third battery pack passes through the fourth battery pack, the fifth battery pack, the sixth battery pack, the seventh battery pack and the eighth battery pack in sequence and finally reaches the high-voltage box 300; The fourth signal from the controller 13 in the battery pack passes through the 5th battery pack, the 6th battery pack, the 7th battery pack and the 8th battery pack in sequence and finally reaches the high-voltage box 300; the fifth signal from the controller 13 in the 5th battery pack passes through the 6th battery pack, the 7th battery pack and the 8th battery pack in sequence and finally reaches the high-voltage box 300; the sixth signal from the controller 13 in the 6th battery pack passes through the 7th battery pack and the 8th battery pack in sequence and finally reaches the high-voltage box 300; the seventh signal from the controller 13 in the 7th battery pack passes through the 8th battery pack and finally reaches the high-voltage box 300; the eighth signal from the controller 13 in the 8th battery pack directly enters the high-voltage box 300.

[0094] In the above technical solution, in the second direction Y, the opposite ends of the signal cable 90 are respectively connected to the low-voltage connectors 16 on different sides of the two adjacent battery packs 10; and in the first direction X, the opposite ends of the signal cable 90 used to electrically connect the two outermost battery packs 10 of the two adjacent layers are respectively connected to the low-voltage connectors 16 on the same side of the two outermost battery packs 10. A shorter signal cable 90 can be used to realize the end-to-end electrical connection of the slave controller 13 in all battery packs 10, saving the use of signal cables 90 and further reducing the cost of the energy storage system 1000. At the same time, due to the reduction of signal cables 90, the line resistance of the signal cables 90 is reduced, and the heat generated by the signal cables 90 is reduced, so that the energy consumption of the energy storage system 1000 is reduced, and the energy utilization rate of the energy storage system 1000 is increased. In addition, the reduction of signal cables 90 reduces the space occupied by the signal cables 90, and there is no need to additionally fix the signal cables 90, which further reduces the cost and improves the stability of signal transmission.

[0095] See also Figure 5 As described above, each battery pack 10 is provided with a high-voltage connector 14 on two opposite sides (the first side 101 and the second side 103) in the second direction Y, one end of the cluster total positive cable 30 is electrically connected to one of the high-voltage connector 14 of the first battery pack 10 (the first battery pack) and the high-voltage connector 14 of the last battery pack 10 (the eighth battery pack), and the other end of the cluster total positive cable 30 is electrically connected to the high-voltage box 300. One end of the cluster total negative cable 50 is electrically connected to the other of the high-voltage connector 14 of the first battery pack 10 and the high-voltage connector 14 of the last battery pack 10, and the other end of the cluster total negative cable 50 is electrically connected to the high-voltage box 300.

[0096] In some embodiments, Figure 6 As shown, one end of the cluster total positive cable 30 is electrically connected to the high-voltage connector 14 of the first battery pack 10 (the first battery pack), and the other end of the cluster total positive cable 30 is electrically connected to the high-voltage box 300. One end of the cluster total negative cable 50 is electrically connected to the high-voltage connector 14 of the last battery pack 10 (the eighth battery pack), and the other end of the cluster total negative cable 50 is electrically connected to the high-voltage box 300. In other embodiments, one end of the cluster total positive cable 30 is electrically connected to the high-voltage connector 14 of the last battery pack 10 (the eighth battery pack), and the other end of the cluster total positive cable 30 is electrically connected to the high-voltage box 300. One end of the cluster total negative cable 50 is electrically connected to the high-voltage connector 14 of the first battery pack 10 (the first battery pack), and the other end of the cluster total negative cable 50 is electrically connected to the high-voltage box 300.

[0097] In the above technical solution, the arrangement of the cluster total positive cable 30 and the cluster total negative cable 50 can aggregate the signals of all battery packs 10 connected in series in a battery cluster 100 and lead them to the high-voltage box 300. After the control unit 303 in the high-voltage box 300 obtains these signals, it can control the charging and discharging of the battery packs 10 in the battery cluster 100 according to these signals, which is very convenient.

[0098] See also Figures 1 to 4 In some embodiments, the battery cluster 100 includes at least two, the high-voltage boxes 300 include at least two, each battery cluster 100 corresponds to one high-voltage box 300, in the same battery cluster 100, the cluster total positive cable 30 and the cluster total negative cable 50 are both electrically connected to the corresponding high-voltage box 300, and at least two high-voltage boxes 300 are located on one side of the battery pack 10 at the first position and the battery pack 10 at the last position of the battery cluster 100.

[0099] This application only takes four battery clusters 100, four high-voltage boxes 300, and one battery cluster 100 corresponding to one high-voltage box 300 as an example for explanation. The four high-voltage boxes 300 are all located on the side where the first battery pack and the eighth battery pack are located, that is, the four high-voltage boxes 300 are all located on the left side of the energy storage system 1000 in the second direction Y, that is, close to the confluence side of the energy storage system 1000. This avoids the traditional solution in which different high-voltage boxes corresponding to different battery clusters are far away from the confluence position, and have to use longer confluence cables to electrically connect the high-voltage boxes to the confluence side, thereby saving the use of confluence cables and reducing costs. At the same time, due to the reduction of confluence cables, the line resistance of the confluence cables is reduced, the heat generated by the confluence cables is reduced, the energy consumption of the energy storage system 1000 is reduced, and the energy utilization rate of the energy storage system 1000 is increased. In addition, the reduction of confluence cables reduces the space occupied by the confluence cables, and there is no need to additionally fix the confluence cables, further reducing costs.

[0100] See also Figure 3 and Figure 4 Further, the energy storage system 1000 may also include a bus total positive cable 700 and a bus total negative cable 900. Each bus total positive cable 700 corresponds to a high voltage box 300, and one end of the bus total positive cable 700 is electrically connected to the bus total positive plug of the corresponding high voltage box 300. Each bus total negative cable 900 corresponds to a high voltage box 300, and one end of the bus total negative cable 900 is electrically connected to the bus total negative plug of the corresponding high voltage box 300.

[0101] In some embodiments, the other end of the bus cable 700 can be electrically connected to the bus bar, and the bus bar is electrically connected to the power storage converter (Power Conversion System, PCS) on the AC side. In other embodiments, the other end of the bus cable 700 can be directly electrically connected to the power storage converter on the AC side.

[0102] Similarly, in some embodiments, the other end of the bus total negative cable 900 can be electrically connected to the bus bar, and the bus bar is electrically connected to the energy storage converter on the AC side. In other embodiments, the other end of the bus total negative cable 900 can be directly electrically connected to the energy storage converter on the AC side.

[0103] In the above technical solution, the arrangement of the bus positive cable 700 and the bus negative cable 900 can lead the signal of the high-voltage box 300 to the energy storage inverter of the bus measurement. The energy storage inverter can control the charging and discharging process of the battery cluster 100, perform AC / DC conversion, and directly supply power to the AC load in the absence of a power grid.

[0104] See also Figure 5 Furthermore, in some embodiments, the battery pack 10 is provided with a refrigerant inlet connector 17, a refrigerant outlet connector 18, and a refrigerant channel (not shown) connecting the refrigerant inlet connector 17 and the refrigerant outlet connector 18. Figure 3 The energy storage system 1000 also includes a refrigerant assembly 500, which is connected to the medium channel through the medium inlet connector 17 of the battery pack 10 and the medium outlet connector 18 of the battery pack 10 to form a heat dissipation channel, and the heat dissipation channel is used for circulating the refrigerant to dissipate heat from the battery pack 10.

[0105] Refrigerants include but are not limited to water, helium, nitrogen or hydrocarbons used for cooling. Figures 3 to 5 The media inlet connector 17 of the battery pack 10 is a connector on the battery pack 10 for supplying refrigerant to flow into the interior of the battery pack 10. The media outlet connector 18 of the battery pack 10 is a connector on the battery pack 10 for supplying refrigerant to flow out of the battery pack 10. The refrigerant channel is a channel in the battery pack 10 for supplying refrigerant to flow, and the channel can be formed by a hollow structure in a pipe or a cooling plate. The refrigerant assembly 500 is a component for cooling the battery cluster 100 using a refrigerant. The refrigerant assembly 500 may include a compressor, an evaporator, a condenser, a valve, a pipe, a liquid storage dryer, etc. The refrigerant assembly 500 is connected to the media channel through the media inlet connector 17 of the battery pack 10 and the media outlet connector 18 of the battery pack 10 to form a heat dissipation channel. The refrigerant circulates in the heat dissipation channel to dissipate heat from the battery pack 10. Specifically, the refrigerant with a lower temperature in the refrigerant assembly 500 enters the battery pack 10 from the refrigerant inlet connector 17 of the battery pack 10, and its temperature increases after absorbing the heat generated by the battery pack 10. The temperature of the battery pack 10 can be guaranteed to be within the required range, while the refrigerant with a higher temperature flows out from the refrigerant outlet connector 18 of the battery pack 10 to the outside of the battery pack 10 and returns to the refrigerant assembly 500. After being processed by the structure in the refrigerant assembly 500, it becomes a refrigerant with a lower temperature. The refrigerant with a lower temperature can enter the battery pack 10 from the refrigerant inlet connector 17 of the battery pack 10 again to form a circulating heat dissipation for the battery pack 10.

[0106] In the above technical solution, the refrigerant assembly 500 is connected with the refrigerant inlet connector 17 of the battery pack 10, the refrigerant outlet connector 18 of the battery pack 10 and the refrigerant channel to form a heat dissipation channel. The refrigerant provided by the refrigerant assembly 500 circulates in the heat dissipation channel to dissipate heat for the battery pack 10, thereby ensuring that the battery cluster 100 can work normally.

[0107] Please also read Figure 3 and Figure 4 The battery cluster 100 forms a plurality of columns of battery packs 10 in the first direction X, and the inlet connector 17 of the battery pack 10 and the outlet connector 18 of the battery pack 10 are respectively located on opposite sides of the battery pack 10 in the second direction Y. Each column of battery packs 10 corresponds to a refrigerant assembly 500. The refrigerant assembly 500 includes a refrigerant unit 501, a refrigerant inlet assembly 503A and a refrigerant outlet assembly 503B. The refrigerant unit 501 includes an installation box 5011, an outlet connector 5013 and an inlet connector 5015 arranged in the installation box 5011. The outlet connector 5013 of the refrigerant unit 501 and the inlet connector 5015 of the refrigerant unit 501 are respectively arranged on opposite sides of the installation box 5011 in the second direction Y. The refrigerant unit 501 is located at the top, bottom or any position between the top and bottom of the battery pack 10 in the corresponding column. The refrigerant inlet assembly 503A and the refrigerant outlet assembly 503B are respectively arranged on opposite sides of the battery pack 10 in the corresponding column in the second direction Y. The refrigerant inlet assembly 503A is connected to the refrigerant outlet connector 5013 of the refrigerant unit 501 and the refrigerant inlet connectors 17 of all the battery packs 10 in the corresponding column. The refrigerant outlet assembly 503B is connected to the refrigerant inlet connector 5015 of the refrigerant unit 501 and the refrigerant outlet connectors 18 of all the battery packs 10 in the corresponding column.

[0108] The fuel inlet connector 17 of the battery pack 10 and the fuel outlet connector 18 of the battery pack 10 are respectively located on opposite sides of the battery pack 10 in the second direction Y. The fuel inlet connector 17 of the battery pack 10 can be located on the first side 101 of the battery pack 10 in the second direction Y, and the fuel outlet connector 18 of the battery pack 10 is located on the second side 103 of the battery pack 10 in the second direction Y. Alternatively, the fuel inlet connector 17 of the battery pack 10 is located on the second side 103 of the battery pack 10 in the second direction Y, and the fuel outlet connector 18 of the battery pack 10 is located on the first side 101 of the battery pack 10 in the second direction Y. This application only takes the example that the fuel inlet connector 17 of the battery pack 10 is located on the first side 101 of the battery pack 10 in the second direction Y, and the fuel outlet connector 18 of the battery pack 10 is located on the second side 103 of the battery pack 10 in the second direction Y.

[0109] Each column of battery packs 10 corresponds to a refrigerant assembly 500. Figure 4 As shown, the present application only illustrates four columns of battery packs 10 and four refrigerant assemblies 500 , and the four columns of battery packs 10 and the four refrigerant assemblies 500 correspond one to one.

[0110] The refrigerant unit 501 is a box structure, in which the electronic devices such as the compressor, evaporator, condenser, and liquid storage dryer in the refrigerant assembly 500 are integrated. The outlet connector 5013 of the refrigerant unit 501 is a connector on the installation box 5011 of the refrigerant unit 501 for allowing the refrigerant to flow out to the outside of the refrigerant unit 501 and connected to the refrigerant inlet assembly 503A. The inlet connector 5015 of the refrigerant unit 501 is a connector on the installation box 5011 of the refrigerant unit 501 for allowing the refrigerant to flow into the interior of the refrigerant unit 501 and connected to the refrigerant outflow assembly 503B. The refrigerant unit 501 can be set at the top of the corresponding column of battery packs 10, the bottom of the corresponding column of battery packs 10, or any position between the top and the bottom.

[0111] The refrigerant inlet assembly 503A is a collection of all components for connecting the outlet connector 5013 of the refrigerant unit 501 and the inlet connector 17 of the battery pack 10. The refrigerant outlet assembly 503B is a collection of all components for connecting the inlet connector 5015 of the refrigerant unit 501 and the outlet connector 18 of the battery pack 10. The refrigerant inlet assembly 503A and the refrigerant outlet assembly 503B are respectively arranged on opposite sides of the battery pack 10 in the corresponding column in the second direction Y. In one example, the outlet connector 5013 of the refrigerant unit 501 and the inlet connector 17 of the battery pack 10 are both on the left side in the second direction Y, the refrigerant inlet assembly 503A is arranged on the left side in the second direction Y, the inlet connector 5015 of the refrigerant unit 501 and the outlet connector 18 of the battery pack 10 are both on the right side in the second direction Y, and the refrigerant outlet assembly 503B is arranged on the right side in the second direction Y. In another example, the refrigerant outlet connector 5013 of the refrigerant unit 501 and the refrigerant inlet connector 17 of the battery pack 10 are both on the right side in the second direction Y, the refrigerant inlet assembly 503A is arranged on the right side in the second direction Y, the refrigerant inlet connector 5015 of the refrigerant unit 501 and the refrigerant outlet connector 18 of the battery pack 10 are both on the left side in the second direction Y, and the refrigerant outflow assembly 503B is arranged on the left side in the second direction Y.

[0112] The refrigerant inlet assembly 503A is connected to the refrigerant outlet connector 5013 of the refrigerant unit 501 and the refrigerant inlet connectors 17 of all battery packs 10 in the corresponding column of battery packs 10, and the refrigerant outlet assembly 503B is connected to the refrigerant inlet connector 5015 of the refrigerant unit 501 and the refrigerant outlet connectors 18 of all battery packs 10 in the corresponding column of battery packs 10. In this way, the refrigerant with a lower temperature in the refrigerant unit 501 enters the refrigerant inlet assembly 503A after passing through the refrigerant outlet joint 5013 of the refrigerant unit 501, and then enters the refrigerant channel in the battery pack 10 through the refrigerant inlet joint 17 of the battery pack 10. The temperature of the refrigerant increases after absorbing the heat generated by the battery pack 10. The refrigerant with a higher temperature enters the refrigerant outflow assembly 503B through the refrigerant outlet joint 18 of the battery pack 10, and then enters the refrigerant unit 501 through the refrigerant inlet joint 5015 of the refrigerant unit 501. After the structural treatment in the refrigerant unit 501, it becomes a refrigerant with a lower temperature again. The refrigerant with a lower temperature can enter the battery pack 10 through the refrigerant inlet assembly 503A again, thereby forming a circulating heat dissipation for the battery pack 10. In this embodiment, the arrangement of the refrigerant inlet assembly 503A and the refrigerant outlet assembly 503B can realize the circulation of the refrigerant in the heat dissipation channel, thereby realizing the heat dissipation of the battery pack 10, thereby ensuring that the battery cluster 100 in the battery pack 10 can operate normally.

[0113] Please combine Figure 8 and Fig. 9 Specifically, in some embodiments, the refrigerant inlet assembly 503A and / or the refrigerant outlet assembly 503B includes at least two primary pipelines 5031, at least two secondary pipelines 5033 and a connecting pipeline 5035. At least two primary pipelines 5031 are arranged in sequence along the first direction X, and two adjacent primary pipelines 5031 are connected through a first joint 5032, and the primary pipeline 5031 at the outermost end (uppermost end) in the first direction X is sealed by the first joint 5032. Each secondary pipeline 5033 corresponds to a first joint 5032, a battery pack 10 and a second joint 5034, one end of the secondary pipeline 5033 is connected to the corresponding first joint 5032, and the other end is connected to the corresponding inlet joint 17 of the battery pack 10 or the outlet joint 18 of the battery pack 10 through the second joint 5034. One end of the connecting pipeline 5035 is connected to the other outermost (lowermost) primary pipeline 5031 in the first direction X, and the other end of the connecting pipeline 5035 is connected to the outlet connector 5013 of the refrigerant unit 501 or the inlet connector 5015 of the refrigerant unit 501 through the third connector 5036.

[0114] In the present application, the structures of the refrigerant inlet assembly 503A and the refrigerant outlet assembly 503B are the same, and both include eight primary pipelines 5031, eight secondary pipelines 5033 and a connecting pipeline 5035. The first joint 5032 between two adjacent primary pipelines 5031 can be a three-way joint, and the first joint 5032 at the top of the primary pipeline 5031 at the outermost end (uppermost end) in the first direction X is a two-way joint. The second joint 5034 is a plug that can be quickly disconnected and quickly plugged with the inlet joint 17 of the battery pack 10 or the outlet joint 18 of the battery pack 10. The third joint 5036 is a joint that can be quickly disconnected and quickly plugged with the outlet joint 5013 of the refrigerant unit 501 or the inlet joint 5015 of the refrigerant unit 501.

[0115] In the present application, the secondary pipeline 5033 is connected to the primary pipeline 5031 through the first joint 5032, and is connected to the battery pack 10 through the second joint 5034, and the connecting pipeline 5035 is connected to the refrigerant unit 501 through the third joint 5036, which can realize the rapid disassembly and assembly of the refrigerant inlet assembly 503A and / or the refrigerant outlet assembly 503B and the battery pack 10, and realize the rapid disassembly and assembly of the refrigerant inlet assembly 503A and / or the refrigerant outlet assembly 503B and the refrigerant unit 501, and the installation efficiency is relatively high.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cluster, characterized in that: The battery cluster comprises: An even number of layers of battery packs stacked along a first direction, each layer comprising at least two battery packs arranged along a second direction, all of the battery packs being connected in series to form a first battery pack and a last battery pack, the first battery pack and the last battery pack being located on the same side of the battery cluster, and the first direction intersecting the second direction; A cluster total positive cable, the cluster total positive cable is led out from one of the first battery pack and the last battery pack and is electrically connected to the positive terminal of the battery pack; and A cluster total negative cable, wherein the cluster total positive cable is led out from the other of the first battery pack and the last battery pack and is electrically connected to the negative electrode terminal of the battery pack.

2. The battery cluster according to claim 1, characterized in that: The even-numbered-layer battery pack includes a battery pack on a top layer and a battery pack on a bottom layer. In the second direction, the positive and negative electrode arrangement of the battery pack on the top layer is opposite to that of the battery pack on the bottom layer.

3. The battery cluster according to claim 1, characterized in that: The battery cluster further comprises: A power cable is used to connect all the battery packs in series.

4. The battery cluster according to claim 3, characterized in that: Each battery pack is provided with a high-voltage connector on opposite sides in the second direction; in the second direction, the opposite ends of the power cable are respectively connected to the high-voltage connectors on different sides of the two adjacent battery packs; in the first direction, the opposite ends of the power cable used to connect in series the two outermost battery packs of two adjacent layers are respectively connected to the high-voltage connectors on the same side of the two outermost battery packs.

5. The battery cluster according to claim 1, characterized in that: The battery pack includes a box, a battery cell disposed in the box, and a slave controller disposed in the box, wherein the slave controller is used to control the battery cell; the battery cluster also includes: A signal cable is used to electrically connect all the battery packs from the controller end to end.

6. The battery cluster according to claim 5, characterized in that: Each battery pack is provided with a low-voltage connector on opposite sides in the second direction; in the second direction, the opposite ends of the signal cable are respectively connected to the low-voltage connectors on different sides of the two adjacent battery packs; in the first direction, the opposite ends of the signal cable used to connect the two outermost battery packs of two adjacent layers are respectively connected to the low-voltage connectors on the same side of the two outermost battery packs.

7. The battery cluster according to claim 1, characterized in that: Each battery pack is respectively provided with a high-voltage connector on opposite sides in the second direction, one end of the cluster total positive cable is electrically connected to one of the high-voltage connector of the first battery pack and the high-voltage connector of the last battery pack, and one end of the cluster total negative cable is electrically connected to the other of the high-voltage connector of the first battery pack and the high-voltage connector of the last battery pack.

8. The battery cluster according to claim 1, characterized in that: The battery pack is provided with a media inlet connector, a media outlet connector and a refrigerant channel connecting the media inlet connector and the media outlet connector. The media inlet connector of the battery pack is used for supplying refrigerant into the refrigerant channel, and the media outlet connector of the battery pack is used for supplying refrigerant carrying heat to flow out of the battery pack from the refrigerant channel.

9. An energy storage system, characterized in that: The energy storage system comprises: The battery cluster according to any one of claims 1 to 4; and A high voltage box, the cluster total positive cable and the cluster total negative cable are both electrically connected to the high voltage box.

10. The energy storage system according to claim 9, characterized in that: The battery pack includes a box, a battery cell disposed in the box, and a slave controller disposed in the box, wherein the slave controller is used to control the battery cell; the battery cluster also includes: A signal cable is used to electrically connect the slave controllers of all the battery packs head to tail, and the control unit in the high-voltage box is electrically connected to the signal cable connecting the first battery pack and the last battery pack.

11. The energy storage system according to claim 10, characterized in that: Each battery pack is provided with a low-voltage connector on opposite sides in the second direction; in the second direction, the opposite ends of the signal cable are respectively connected to the low-voltage connectors on different sides of the two adjacent battery packs; in the first direction, the opposite ends of the signal cable used to connect the two outermost battery packs of two adjacent layers are respectively connected to the low-voltage connectors on the same side of the two outermost battery packs.

12. The energy storage system according to claim 9, characterized in that: Each battery pack is provided with a high-voltage connector on two opposite sides in the second direction, one end of the cluster total positive cable is electrically connected to one of the high-voltage connector of the first battery pack and the high-voltage connector of the last battery pack, and the other end of the cluster total positive cable is electrically connected to the high-voltage box; One end of the cluster total negative cable is electrically connected to the other of the high voltage connector of the first battery pack and the high voltage connector of the last battery pack, and the other end of the cluster total negative cable is electrically connected to the high voltage box.

13. The energy storage system according to claim 9, characterized in that: The battery clusters include at least two, the high-voltage boxes include at least two, each battery cluster corresponds to one high-voltage box, in the same battery cluster, the cluster total positive cable and the cluster total negative cable are electrically connected to the corresponding high-voltage box, and at least two of the high-voltage boxes are located on one side of the battery pack at the first position and the battery pack at the last position of the battery cluster.

14. The energy storage system according to claim 9, characterized in that: The energy storage system further comprises: A busbar positive cable, each busbar positive cable corresponds to one high-voltage box, and one end of the busbar positive cable is electrically connected to the positive electrode of the corresponding high-voltage box; and A total negative bus cable, each of which corresponds to a high-voltage box, and one end of the total negative bus cable is electrically connected to the negative pole of the corresponding high-voltage box.

15. The energy storage system according to claim 9, characterized in that: The battery pack is provided with a media inlet connector, a media outlet connector and a refrigerant channel connecting the media inlet connector of the battery pack and the media outlet connector of the battery pack; the energy storage system further comprises a refrigerant assembly, the refrigerant assembly is connected with the media channel through the media inlet connector of the battery pack and the media outlet connector of the battery pack to form a heat dissipation channel, and the heat dissipation channel is used for circulating refrigerant to dissipate heat from the battery pack.

16. The energy storage system according to claim 15, characterized in that: The battery cluster forms a plurality of columns of battery packs in the first direction, and the media inlet connectors and the media outlet connectors of the battery packs are respectively located on opposite sides of the battery packs in the second direction; each column of the battery packs corresponds to one refrigerant component, and the refrigerant component comprises a refrigerant unit, a refrigerant inlet assembly and a refrigerant outlet assembly, and the refrigerant unit is respectively provided with a media inlet connector and a media outlet connector on opposite sides of the second direction, and the refrigerant unit is located at the top, bottom or any position between the top and the bottom of the battery packs in the corresponding column, and the refrigerant inlet assembly and the refrigerant outlet assembly are respectively provided on opposite sides of the battery packs in the corresponding column in the second direction, and the refrigerant inlet assembly is connected to the media outlet connector of the refrigerant unit and the media inlet connectors of all the battery packs in the battery packs in the corresponding column, and the refrigerant outlet assembly is connected to the media inlet connector of the refrigerant unit and the media outlet connectors of all the battery packs in the battery packs in the corresponding column.

17. The energy storage system according to claim 16, characterized in that: The refrigerant inlet assembly and / or the refrigerant outlet assembly comprises: At least two primary pipelines, at least two of the primary pipelines are arranged in sequence along the first direction, two adjacent primary pipelines are connected through a first joint, and an outermost primary pipeline in the first direction is sealed by the first joint; At least two secondary pipelines, each of which corresponds to one of the first connectors, one of the battery packs and one of the second connectors, one end of the secondary pipeline being connected to the corresponding first connector, and the other end of the secondary pipeline being connected to the corresponding fuel inlet connector of the battery pack or the fuel outlet connector of the battery pack through the second connector; and A connecting pipeline, one end of which is connected to the other outermost primary pipeline in the first direction, and the other end of which is connected to the inlet connector of the refrigerant unit or the outlet connector of the refrigerant unit through a third connector.

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