Energy storage system and connecting piece

Abstract

The invention discloses an energy storage system and a connecting piece, and belongs to the technical field of energy storage. The energy storage system comprises at least two energy storage elements, an electronic conversion device and a connecting device. The energy storage elements are connected with a first positive connector and a first negative connector. The electronic conversion device is connected with a second positive connector and a second negative connector; the connecting device comprises at least two connecting pieces, each connecting piece is provided with at least two first power connection parts and a second power connection part, and the number of the first power connection parts is at least two. At least one connecting piece constructs a positive electrode circuit between the energy storage element and the electronic conversion device, a first power connection part located on the positive electrode circuit is connected with the first positive connector, and a second power connection part is connected with the second positive connector; at least another connecting piece constructs a negative electrode circuit between the energy storage element and the electronic conversion device, a first power connection part located in the negative electrode circuit is connected with the first negative connector, and a second power connection part is connected with the second negative connector. And the plurality of energy storage elements are converged by the connecting pieces and then connected to the electronic conversion device, so that wiring is simple.

Description

Technical Field

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

[0002] In existing residential photovoltaic and energy storage systems, users match different power demands by using different numbers of battery modules. Residential systems typically include various components such as battery modules, inverters, and distribution boxes. The positive and negative outputs of multiple battery modules are electrically connected to the inverter via wires. However, inverters usually only have one positive and one negative DC input, and multiple battery modules have multiple positive and negative outputs, making on-site wiring complex and difficult. Summary of the Invention

[0003] This application provides an energy storage system designed to solve the technical problems of low field wiring efficiency and difficult wiring; this application also provides a connector.

[0004] Technical solution: This application discloses an energy storage system, including:

[0005] At least two energy storage elements, each energy storage element being connected to a first positive terminal and a first negative terminal;

[0006] An electronic converter, wherein the electronic converter is connected to a second positive connector and a second negative connector;

[0007] A connecting device includes at least two connectors, each connector having a first electrical contact portion and a second electrical contact portion, wherein the number of the first electrical contact portions is at least two.

[0008] At least one of the connectors forms a positive circuit between the energy storage element and the electronic conversion device, wherein the first contact portion located in the positive circuit is connected to the first positive terminal, and the second contact portion is connected to the second positive terminal.

[0009] At least one of the connectors forms a negative circuit between the energy storage element and the electronic conversion device, with the first contact portion of the negative circuit connected to the first negative terminal and the second contact portion connected to the second negative terminal.

[0010] In some embodiments, the number of connectors is two, and the number of first electrical contacts in each connector is greater than or equal to the number of energy storage elements.

[0011] In some embodiments, the positive circuit includes at least two of the connectors and is arranged in multiple stages, wherein in two adjacent stages, the second contact portion of the connector in the preceding stage is electrically connected to the first contact portion of the connector in the following stage.

[0012] And / or, the negative electrode circuit includes at least two of the connectors and is arranged in multiple stages, wherein in two adjacent stages, the second contact portion of the connector in the preceding stage is electrically connected to the first contact portion of the connector in the following stage.

[0013] In some embodiments, in two adjacent levels, the number of connectors in the preceding level is greater than or equal to the number of connectors in the following level.

[0014] In some embodiments, the number of connectors connected to the electronic conversion device in the connection device is two, wherein the second electrical contact portion of one connector is electrically connected to the second positive terminal, and the second electrical contact portion of the other connector is electrically connected to the second negative terminal.

[0015] In some embodiments, both the positive circuit and the negative circuit include at least two of the connectors and are arranged in a multi-level manner;

[0016] The connecting device also includes multiple connecting lines, one end of which is connected to a first connector and the other end of which is connected to a second connector;

[0017] In the connectors located in two adjacent stages of the positive circuit, the second contact portion of the connector in the preceding stage is electrically connected to the first connector of the connecting line, and the first contact portion of the connector in the following stage is electrically connected to the second connector of the connecting line.

[0018] In the connectors located in adjacent stages of the negative electrode circuit, the second contact portion of the connector in the preceding stage is electrically connected to the first connector of the other connecting line, and the first contact portion of the connector in the following stage is electrically connected to the second connector of the connecting line.

[0019] In some embodiments, the connector includes a housing and an inner core, the housing having a first side and a second side, the inner core being disposed within the housing and forming a plurality of first electrical contacts with the housing on the first side and forming a second electrical contact on the second side.

[0020] In some embodiments, the inner core includes a first core rod, a second core rod, and a busbar. There are multiple first core rods, which are connected to one side of the busbar and form multiple first contact portions with the housing on the first side. The second core rod is connected to the other side of the busbar and forms a second contact portion with the housing on the second side.

[0021] In some embodiments, the housing includes a first body and a second body, wherein there are multiple first bodies arranged at intervals and corresponding one-to-one with multiple first core rods, the first core rods being housed in the cavity of the first body and the second core rods being housed in the cavity of the second body.

[0022] In some embodiments, the first side and the second side are arranged along the length direction, and a plurality of the first bodies are staggered along the length direction.

[0023] In some embodiments, the first electrical connector is configured as either a male or a female connector;

[0024] The second electrical connector is configured as either a male or a female connector.

[0025] In some embodiments, the connector further includes a first resilient metal sleeve;

[0026] When the first electrical contact is a male, the first elastic metal sleeve is housed in the first body and connected to the end of the first core rod away from the second core rod.

[0027] Alternatively, the connector may further include a second elastic metal sleeve; in the case that the second electrical contact is a female head, the second elastic metal sleeve is housed within the second body and connected to the end of the second core rod away from the first core rod.

[0028] In some embodiments, the connector further includes a limiting segment;

[0029] When the first electrical contact part is a male connector, the limiting segment is disposed on the periphery of the first body, and there is a gap between the limiting segment and the first body. A sealing element is sleeved on the outer periphery of the first body.

[0030] When the second electrical contact is a female connector, the limiting segment is disposed on the periphery of the second body, and there is a gap between the limiting segment and the second body. A sealing element is sleeved on the outer periphery of the second body.

[0031] In some embodiments, the number of first electrical contacts of the connector is two or three.

[0032] In some embodiments, the energy storage system further includes:

[0033] A wire trough converter has a receiving cavity and at least two through ports, the at least two through ports being located on different sides of the wire trough converter and communicating with the receiving cavity, and the connector being received in the receiving cavity;

[0034] A first wiring slot is connected to the at least two energy storage elements in its extending direction. The first wiring slot is provided with the wiring slot conversion head, and at least one through port is connected to the first wiring slot.

[0035] The second wiring slot is located between the wiring slot conversion head and the electronic conversion device, and the other through port is connected to the second wiring slot.

[0036] In some embodiments, in the connecting device, at least two of the connectors are arranged along the extension direction of the first wiring groove, and two of the connectors connected to the electronic conversion device are arranged along the extension direction of the second wiring groove.

[0037] In some embodiments, the number of the wire slot conversion heads is multiple, and they are arranged at intervals on the first wiring slot;

[0038] In the plurality of the wire trough conversion heads, at least one of the wire trough conversion heads has a through port that communicates with the second wiring trough, and each of the wire trough conversion heads is provided with at least two of the connectors.

[0039] In some embodiments, the wire trough adapter includes a housing and a cover, the cover being snapped together with the housing and forming the receiving cavity;

[0040] The cavity is provided with a fixing buckle, which is used to fix the connector.

[0041] This application embodiment also provides a connector, including: a housing and an inner core, the housing having a first side and a second side, the inner core being disposed inside the housing and forming a plurality of first electrical contacts with the housing on the first side and forming a second electrical contact on the second side.

[0042] Beneficial Effects: The energy storage system in this embodiment includes at least two energy storage elements, an electronic conversion device, and a connecting device. The energy storage elements are connected to a first positive terminal and a first negative terminal; the electronic conversion device is connected to a second positive terminal and a second negative terminal; the connecting device includes at least two connectors, each with a first contact portion and a second contact portion, with at least two first contact portions; at least one connector establishes a positive circuit between the energy storage element and the electronic conversion device, with the first contact portion in the positive circuit connected to the first positive terminal and the second contact portion connected to the second positive terminal; at least another connector establishes a negative circuit between the energy storage element and the electronic conversion device, with the first contact portion in the negative circuit connected to the first negative terminal and the second contact portion connected to the second negative terminal. By using connectors to combine multiple energy storage elements before connecting them to the electronic conversion device, the need for wiring space is reduced, the risk of numerous cross-connections of cables in traditional parallel boxes is lowered, the wiring path is clearer, and complex cable management is not required during on-site construction, reducing labor costs and the probability of errors. Furthermore, the connectors are small in size and adopt a modular design, allowing for flexible arrangement. By increasing or decreasing the number of connectors, different power requirements of the power system can be met without relying on parallel boxes for secondary configuration. At the same time, it solves the technical problem of some ports being idle due to the fixed interface design of traditional parallel boxes. It has good flexibility and reduces the cost waste caused by hardware idleness. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a connection diagram of the energy storage system according to an embodiment of this application;

[0045] Figure 2 This is a connection diagram of an energy storage system according to another embodiment of this application;

[0046] Figure 3 This is a connection diagram of an energy storage system according to another embodiment of this application;

[0047] Figure 4 This is a schematic diagram showing the assembly positions of the connector, the first positive connector, and the second positive connector in an embodiment of this application.

[0048] Figure 5 This is a schematic diagram showing the assembly positions of the connector, the first negative connector, and the second negative connector in an embodiment of this application.

[0049] Figure 6This is a schematic diagram of the assembly of the connector with the first positive connector and the second positive connector according to an embodiment of this application. The diagram illustrates the structure of a connector.

[0050] Figure 7 This is a schematic diagram of the assembly of a connector with a first positive connector and a second positive connector according to another embodiment of this application. The diagram illustrates the structure of another connector.

[0051] Figure 8 This is a schematic diagram of the connecting wires in the energy storage system according to an embodiment of this application;

[0052] Figure 9 This is an exploded view of the connector in an embodiment of this application;

[0053] Figure 10 This is an exploded view of a connector according to another embodiment of this application;

[0054] Figure 11 This is a schematic diagram of the energy storage system layout according to an embodiment of this application, showing multiple cable tray converters;

[0055] Figure 12 This is a schematic diagram showing the arrangement of the cable tray converter and connectors in the energy storage system according to an embodiment of this application;

[0056] Figure 13 This is a schematic diagram of the arrangement of an energy storage system according to another embodiment of this application, showing multiple cable tray converters;

[0057] Figure 14 This is a schematic diagram of the structure of the cable tray converter in the energy storage system of this application embodiment. The cable tray converter shown in the diagram is a T-junction.

[0058] Figure 15 This is a schematic diagram of the energy storage system layout according to an embodiment of this application;

[0059] Figure 16 This is a schematic diagram of the layout of an energy storage system according to another embodiment of this application;

[0060] Figure 17 This is a schematic diagram of the layout of an energy storage system according to another embodiment of this application;

[0061] Figure 18 This is a schematic diagram of the layout of an energy storage system according to another embodiment of this application;

[0062] Figure 19 This is a schematic diagram of the layout of an energy storage system according to another embodiment of this application;

[0063] Figure 20 This is a schematic diagram of the layout of an energy storage system according to another embodiment of this application.

[0064] Explanation of reference numerals in the attached figures:

[0065] 10. Energy storage element; 101. First positive connector; 102. First negative connector; 20. Electronic conversion device; 201. Second positive connector; 202. Second negative connector; 30. Connecting device; 300. Connector; 310. Housing; 320. Inner core; 311. First side; 312. Second side; 301. First contact part; 302. Second contact part; 41. Previous stage; 42. Next stage; 1. Positive circuit; 2. Negative circuit; 313. First body; 314. Second body; 321. First core rod; 322. Second core rod; 323. Busbar; 330. Connecting wire; 331. First connector; 332. Second connector; X, length direction; 340. First elastic metal sleeve; 341. Second elastic metal sleeve; 315. Limiting section; 350. Seal;

[0066] 50. Cable tray adapter; 500. Receiving cavity; 501. Through opening; 60. First wiring tray; 70. Second wiring tray; 502. Box body; 503. Cover body; 504. Fixing buckle. Detailed Implementation

[0067] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0068] In the description of this application, it should be understood that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, "multiple" means two or more, and "at least one" can refer to one, two, or more, unless otherwise explicitly specified. The terms "first," "second," and "third," etc., are only for the convenience of description and are used to name parts or embodiments by number, and do not imply any order of importance between the parts or embodiments.

[0069] It should also be noted that in the accompanying drawings of this application, an arrow marked X is used to indicate the length direction X. In the description of this application, the length direction X is introduced to more clearly define the structure and relative positional relationship of each component in the energy storage system and connector 300. Optionally, the first direction, the second direction, and the third direction are perpendicular to each other to optimize the layout of the energy storage system and connector 300.

[0070] As an introduction to this application's embodiments, in existing residential photovoltaic (PV) and energy storage systems, users match different power demands by varying the number of battery modules. Residential PV and energy storage systems typically include battery modules, inverters, distribution boxes, and other components. The positive and negative outputs of multiple battery modules are electrically connected to the inverter via wires. However, the inverter usually only has one positive and one negative DC input, while multiple battery modules have multiple positive and negative outputs, requiring parallel boxes to connect them. However, parallel boxes generally provide interfaces for the maximum capacity system. When the power demand is not fully met, some ports remain unused, resulting in wasted costs. If the power demand is not met, more parallel boxes with more interfaces need to be replaced, leading to higher management costs; furthermore, replacing parallel boxes requires power outages, affecting power supply and complicating operations. Moreover, parallel boxes are large, making on-site wiring complex and difficult.

[0071] In view of the above, embodiments of this application provide an energy storage system aimed at solving at least one of the aforementioned technical problems.

[0072] Please see Figure 1 As shown in the figure, this application discloses an energy storage system, including: at least two energy storage elements 10, an electronic conversion device 20, and a connection device 30. For example... Figure 4 and Figure 5 As shown, the energy storage element 10 is connected to a first positive connector 101 and a first negative connector 102; the electronic converter 20 is connected to a second positive connector 201 and a second negative connector 202. The connection device 30 includes at least two connectors 300, each connector 300 having a first contact portion 301 and a second contact portion 302, with at least two first contact portions 301. It should be understood that the connector 300 has a busbar structure where at least two first contact portions 301 correspond to one second contact portion 302. By using the connector 300 to busbarize multiple energy storage elements 10 and then connect them to the electronic converter 20, the requirement for wiring space is reduced, the risk of a large number of cables crossing in traditional parallel boxes is lowered, the wiring path is clearer, and complex cable management is not required during on-site construction, reducing labor costs and the probability of errors.

[0073] Please see Figure 1 and Figure 2As shown, in some embodiments, there are two connectors 300, and the number of first contact portions 301 in each connector 300 is greater than or equal to the number of energy storage elements 10. It should be understood that when there are two connectors 300, one connector 300 forms a positive circuit 1 between the plurality of energy storage elements 10 and the electronic conversion device 20, and the other connector 300 forms a negative circuit 2 between the plurality of energy storage elements 10 and the electronic conversion device 20. The number of first contact portions 301 in the connector 300 located in the positive circuit 1 is greater than or equal to the number of energy storage elements 10. Similarly, the number of first contact portions 301 in the connector 300 located in the negative circuit 2 is greater than or equal to the number of energy storage elements 10. When the number of first contact portions 301 exceeds the number of energy storage elements 10, the extra first contact portions 301 are used to connect newly added energy storage elements 10 when power demand increases. Alternatively, if some of the first electrical contacts 301 are damaged, the extra first electrical contacts 301 can be used as spares to improve maintenance efficiency.

[0074] In some embodiments, the number of first electrical contact portions 301 of the connector 300 is two (e.g., Figure 1 (As shown). That is, the connector 300 can collect the output current of the two energy storage elements 10.

[0075] In some embodiments, the number of first electrical contact portions 301 of the connector 300 is three (e.g., Figure 2 (As shown). That is, the connector 300 can collect the output current of the three energy storage elements 10.

[0076] Please see Figure 3 As shown, at least one connector 300 forms a positive circuit 1 between the energy storage element 10 and the electronic conversion device 20. A first contact portion 301 in the positive circuit 1 is connected to a first positive terminal 101, and a second contact portion 302 is connected to a second positive terminal 201. At least another connector 300 forms a negative circuit 2 between the energy storage element 10 and the electronic conversion device 20. A first contact portion 301 in the negative circuit 2 is connected to a first negative terminal 102, and a second contact portion 302 is connected to a second negative terminal 202. By independently configuring the positive circuit 1 and the negative circuit 2, when there are at least two connectors 300 in the positive circuit 1, some connectors 300 are connected in series, and some connectors 300 are connected in parallel, ultimately converging multiple energy storage elements 10 into one path to achieve a positive connection with the electronic conversion device 20. Similarly, when there are at least two connectors 300 in the negative circuit 2, some connectors 300 are connected in series and some connectors 300 are connected in parallel, ultimately converging multiple energy storage elements 10 into one channel to achieve negative connection with the electronic conversion device 20.

[0077] It should be noted that the more first electrical contact parts 301 there are, the fewer connectors 300 are required for the same power demand.

[0078] In some embodiments, the connecting device 30 is located on the side close to the multiple energy storage elements 10. The multiple energy storage elements 10 are combined via the connector 300 to form a positive and a negative terminal, which are then connected to the positive and negative terminals of the electronic converter 20. Compared to directly connecting the energy storage elements 10 to the parallel box, connecting them to the electronic converter 20 via the parallel box simplifies the wiring layout and reduces the number and length of wires. Secondly, the connector 300 is small in size and adopts a modular design, allowing for flexible arrangement and reducing the space required for layout. By increasing or decreasing the number of connectors 300, different power requirements of the power system can be met without relying on the parallel box for secondary configuration. Simultaneously, it solves the technical problem of some ports being idle in the fixed interface design of traditional parallel boxes, offering good flexibility and reducing cost waste caused by hardware idleness.

[0079] Please see Figure 3 As shown, in some embodiments, the positive circuit 1 includes at least two connectors 300 arranged in multiple stages. In adjacent stages, the second contact portion 302 of the connector 300 in the preceding stage 41 is electrically connected to the first contact portion 301 of the connector 300 in the following stage 42. Similarly, in some embodiments, the negative circuit 2 includes at least two connectors 300 arranged in multiple stages. In adjacent stages, the second contact portion 302 of the connector 300 in the preceding stage 41 is electrically connected to the first contact portion 301 of the connector 300 in the following stage 42. It should be understood that by deploying at least two connectors 300 in the positive circuit 1 or negative circuit 2 in stages, and connecting different stages in series, the centralized design of the traditional parallel box is replaced, solving the problem of excessively large single module size. By increasing or decreasing the number of stages or adjusting the number of connectors 300 in each stage, different power requirements can be flexibly matched. When a stage has multiple connectors 300, the second electrical contact portion 302 of the connector 300 is connected to multiple first electrical contact portions 301 of the next stage connector 300. If the number of connectors 300 in this stage is greater than the number of first electrical contact portions 301 of the next stage connector 300, multiple connectors 300 can be added to the next stage so that the number of connectors 300 in this stage (equal to the number of second electrical contact portions 302) is less than or equal to the number of first electrical contact portions 301 of the next stage. The above structure supports plug-and-play expansion without replacing the overall connection device 30. It only requires connecting the corresponding number of stages according to needs, adapting to different energy storage scale scenarios, increasing adaptability to various scenarios, and reducing customized hardware costs.

[0080] It is also important to understand that by constructing the positive circuit 1 and the negative circuit 2 in a hierarchical manner, the current path between the energy storage element 10 and the electronic conversion device 20 can be shortened, reducing line impedance and energy loss. At the same time, the multi-level redundancy design can enhance the circuit's anti-interference capability. With the hierarchical arrangement, if a fault occurs in a certain level of connector 300, targeted repairs can be performed without affecting the operation of other connectors 300, thus improving maintenance efficiency.

[0081] Please see Figure 3 As shown, in some embodiments, in adjacent stages, the number of connectors 300 in the preceding stage 41 is greater than or equal to the number of connectors 300 in the following stage 42. It should be understood that the connectors 300 adopt a convergence structure with at least two first contact parts 301 corresponding to one second contact part 302. In the positive circuit 1, only one positive terminal is connected to the electronic converter 20. Similarly, in the negative circuit 2, only one negative terminal is connected to the electronic converter 20. Based on this, by setting the number of connectors 300 in the preceding stage 41 to be greater than or equal to the number of connectors 300 in the following stage 42, the wiring layout between the energy storage element 10 and the electronic converter 20 is optimized, resulting in clearer and simpler wiring. Fewer parallel lines are connected closer to the electronic converter 20, simplifying the number of wiring lines and spatial layout. Its simple structure shortens the current path between the energy storage element 10 and the electronic converter 20, reducing line impedance and energy loss.

[0082] Please see Figures 1 to 3 As shown, in some embodiments, the connection device 30 has two connectors 300 connected to the electronic converter 20. One connector 300 has its second contact portion 302 electrically connected to the second positive terminal 201, and the other connector 300 has its second contact portion 302 electrically connected to the second negative terminal 202. It should be understood that the number of connectors 300 varies based on the number of energy storage elements 10 or the number of first contact portions 301 in a single connector 300. However, only two connectors 300 are connected to the electronic converter 20, one located in the positive circuit 1 and the other in the negative circuit 2. When the energy storage capacity needs to be increased, the number of earlier-level connectors 300 can be increased; when the energy storage capacity needs to be reduced, the number of earlier-level connectors 300 can be reduced. Increasing or decreasing the energy storage capacity does not require changing the number of connectors 300 connected to the electronic converter 20, thus ensuring that capacity expansion and reduction do not change the output standard. The hierarchical convergence structure reduces the complexity of cross-level wiring. The connectors 300 at the front level can be connected to the energy storage element 10 nearby, and the connectors 300 at the rear level are converged into a fixed output terminal and connected to the electronic conversion device 20. The on-site wiring space requirement is reduced, making it especially suitable for compact installations in residential scenarios.

[0083] Please combine Figure 3 And see Figure 8 As shown, in some embodiments, one or both of the positive circuit 1 and the negative circuit 2 include at least two connectors 300, arranged in multiple stages; the connecting device 30 also includes multiple connecting lines 330, one end of which is connected to a first connector 331, and the other end is connected to a second connector 332; in the connectors 300 of two adjacent stages in the positive circuit 1, the second contact portion 302 of the connector 300 in the previous stage 41 is electrically connected to the first connector 331 of the connecting line 330, and the first contact portion 301 of the connector 300 in the next stage 42 is electrically connected to the second connector 332 of the connecting line 330; in the connectors 300 of two adjacent stages in the negative circuit 2, the second contact portion 302 of the connector 300 in the previous stage 41 is electrically connected to the first connector 331 of another connecting line 330, and the first contact portion 301 of the connector 300 in the next stage 42 is electrically connected to the second connector 332 of the connecting line 330.

[0084] It is important to understand that in a multi-stage system, adjacent connectors 300 are connected via connecting wires 330. The first connector 331 and the second connector 332 of the connecting wire 330 engage with the connector 300 via a plug-in connection, improving assembly efficiency. Simultaneously, there is no need for on-site welding of cables or crimping of terminals, reducing reliance on construction tools and avoiding contact resistance issues caused by poor welding. When a connecting wire 330 or connector 300 fails, the corresponding component can be directly plugged in and replaced without disassembling the entire connecting device 30.

[0085] Please see Figure 6 and Figure 7 As shown, in some embodiments, the connector 300 includes a housing 310 and an inner core 320. The housing 310 has a first side 311 and a second side 312. The inner core 320 is disposed within the housing 310 and forms a plurality of first contact portions 301 with the housing 310 on the first side 311, and a second contact portion 302 is formed on the second side 312. It should be understood that the housing 310 serves to provide external insulation and to house the inner core 320. Furthermore, the housing 310 is also used for plugging and mating with other components. In some embodiments, the first side 311 and the second side 312 are opposite to each other on the housing 310, which facilitates hierarchical arrangement and forms a flat structure of "single-sided input - opposite-sided output".

[0086] Please see Figure 9 and Figure 10As shown, in some embodiments, the inner core 320 includes a first core rod 321, a second core rod 322, and a busbar 323. There are multiple first core rods 321, which are connected to one side of the busbar 323 and form multiple first contact portions 301 with the housing 310 on the first side 311. The second core rod 322 is connected to the other side of the busbar 323 and forms a second contact portion 302 with the housing 310 on the second side 312. It should be understood that the multiple first core rods 321 forming multiple first contact portions 301 on the first side 311 of the housing 310, and the multiple first core rods 321 connected to the busbar 323, achieves multi-path current convergence; the second core rod 322 forming a second contact portion 302 on the second side 312 of the housing 310, and the second core rod 322 connected to the busbar 323, thereby constructing a current guiding path from the first contact portion 301 to the second contact portion 302. The busbar 323 also increases the spacing between adjacent first core rods 321 to reserve space for the first electrical contact part 301 to be inserted into other components. The housing 310 serves as a mechanical fixing structure, forming an electrical connection path with the inner core 320, reducing the number of parts, lowering the risk of assembly errors, and improving system integration.

[0087] Please see Figure 9 or Figure 10 As shown, in some embodiments, the housing 310 includes a first body 313 and a second body 314. There are multiple first bodies 313, spaced apart and corresponding one-to-one with multiple first core rods 321. The first core rods 321 are housed within the cavities of the first bodies 313, and the second core rods 322 are housed within the cavities of the second bodies 314. It should be understood that the spaced arrangement of multiple first bodies 313 allows for insertion and engagement with different components. In the positive circuit 1, the connector 300 connected to the energy storage element 10 engages with the first positive connector 101 via the first body 313 and with the first connector 331 via the second body 314. Similarly, in the negative circuit 2, the connector 300 connected to the energy storage element 10 engages with the first negative connector 102 via the first body 313 and with the first connector 331 via the second body 314. In the positive circuit 1, the connector 300 connected to the electronic converter 20 is engaged with the second positive connector 201 via the second body 314, and with the second connector 332 via the first body 313. Similarly, in the negative circuit 2, the connector 300 connected to the electronic converter 20 is engaged with the second negative connector 202 via the second body 314, and with the second connector 332 via the first body 313.

[0088] In some embodiments, the first side 311 and the second side 312 are arranged along the length direction X, and a plurality of first bodies 313 are staggered along the length direction X. It should be understood that the staggered arrangement of the plurality of first bodies 313 means that the first bodies 313 are disposed on different planes in the length direction X, reducing the risk of multiple first bodies 313 stacking on the first plane and ensuring that when an external component is inserted into a first body 313, adjacent first bodies 313 will not interfere. Simultaneously, the height difference between adjacent first bodies 313 in the length direction X further avoids interference and improves assembly efficiency.

[0089] Please see Figure 4 and Figure 5 As shown, in some embodiments, the first power connector 301 is configured as either a male or a female connector; the second power connector 302 is configured as either a male or a female connector. It should be understood that the first positive connector 101, the second positive connector 201, the first negative connector 102, the second negative connector 202, the first connector 331, and the second connector 332 can all adopt standardized male or female connector structures. It is important to note that during assembly, to further improve assembly efficiency and reduce the misconnection rate, the structures of connectors 300 need to be differentiated. For example, in the positive circuit 1, connector 300 has a male connector for its first contact part 301 and a female connector for its second contact part 302; in the negative circuit 2, connector 300 has a female connector for its first contact part 301 and a male connector for its second contact part 302. The remaining components (first positive connector 101, second positive connector 201, first negative connector 102, second negative connector 202, first connector 331, and second connector 332) adopt a plug-in structure with connectors 300. By differentiating the connectors of connectors 300 in the positive circuit 1 and the negative circuit 2, the risk of misconnection can be further reduced, and assembly efficiency can be improved.

[0090] Please see Figure 9 and Figure 10 As shown, in some embodiments, the connector 300 further includes a first elastic metal sleeve 340; when the first contact portion 301 is a male connector, the first elastic metal sleeve 340 is housed within the first body 313 and connected to the end of the first core rod 321 away from the second core rod 322. In some embodiments, the connector 300 further includes a second elastic metal sleeve 341; when the second contact portion 302 is a female connector, the second elastic metal sleeve 341 is housed within the second body 314 and connected to the end of the second core rod 322 away from the first core rod 321. It should be understood that by providing the first elastic metal sleeve 340, hard contact is avoided when the first contact portion 301 is assembled with other components, thus improving protection. By providing the second elastic metal sleeve 341, hard contact is avoided when the second contact portion 302 is assembled with other components, thus improving protection.

[0091] Please see Figure 9 and Figure 10 As shown, in some embodiments, the connector 300 further includes a limiting section 315; when the first contact portion 301 is a male connector, the limiting section 315 is disposed on the periphery of the first body 313, with a gap between the limiting section 315 and the first body 313, and a sealing member 350 is sleeved on the outer periphery of the first body 313; when the second contact portion 302 is a female connector, the limiting section 315 is disposed on the periphery of the second body 314, with a gap between the limiting section 315 and the second body 314, and a sealing member 350 is sleeved on the outer periphery of the second body 314. It should be understood that by adding the limiting section 315, assembly positioning efficiency is improved, and the risk of disengagement due to external force after insertion and mating is reduced.

[0092] Please see Figures 11 to 13 As shown, in some embodiments, the energy storage system further includes a cable tray converter 50, a first wiring tray 60, and a second wiring tray 70. The cable tray converter 50 has a receiving cavity 500 and at least two through ports 501. The at least two through ports 501 are located on different sides of the cable tray converter 50 and communicate with the receiving cavity 500. The connector 300 is received within the receiving cavity 500. The first wiring tray 60 connects at least two energy storage elements 10 in its extending direction. The cable tray converter 50 is provided on the first wiring tray 60, and at least one through port 501 communicates with the first wiring tray 60. The second wiring tray 70 is disposed between the cable tray converter 50 and the electronic conversion device 20, and another through port 501 communicates with the second wiring tray 70. Please refer to [link to relevant documentation]. Figure 13 As shown, in some embodiments, the wire trough adapter 50 can be a three-way structure, that is, the wire trough adapter 50 has three through ports 501, of which two through ports 501 are used to connect to the first wiring trough 60, and one through port 501 is used to connect to the second wiring trough 70. Please refer to... Figure 11 and Figure 12 As shown, in some other embodiments, the wire trough adapter 50 can be a four-way structure, that is, the wire trough adapter 50 has four through ports 501, of which three through ports 501 are used to connect to the first wiring trough 60 and one through port 501 is used to connect to the second wiring trough 70.

[0093] Please see Figure 15 and Figure 16 As shown, in some other embodiments, the wire trough adapter 50 can be a two-way structure, that is, the wire trough adapter 50 has two through ports 501, one through port 501 for connecting the first wiring trough 60 and the other through port 501 for connecting the second wiring trough 70.

[0094] It is important to understand that by setting up the first wiring trough 60, the outgoing lines of the energy storage element 10 are centrally collected, avoiding the dispersion of lines; by setting up the second wiring trough 70, the lines leading to the electronic converter 20 are organized; the wiring trough converter 50 connects to the first wiring trough 60 and the second wiring trough 70 respectively through the through-holes 501 on different sides, and by setting the connector 300 in the receiving cavity 500 of the wiring trough converter 50, the wiring trough converter 50 acts as an intermediate hub to achieve orderly turning and convergence of lines, significantly simplifying the on-site wiring process and reducing the difficulty of wiring. When it is necessary to add an energy storage element 10, a parallel energy storage element 10 can be added directly in the extension direction of the first wiring trough 60. Its line is directly connected to the through-hole 501 of the wiring trough converter 50 through the first wiring trough 60 and connected to the first power connection part 301 reserved on the connector 300, without the need to readjust the overall wiring structure.

[0095] Please see Figures 17 to 20 As shown, in some embodiments, in the connecting device 30, at least two connectors 300 are arranged along the extension direction of the first wiring groove 60, and two connectors 300 connected to the electronic conversion device 20 are arranged along the extension direction of the second wiring groove 70. It should be understood that by setting the arrangement direction of the connectors 300 to correspond to the arrangement direction of the energy storage element 10, the positive and negative terminals of the energy storage element 10 can be connected to the first contact portion 301 of the connector 300 as close as possible along the extension direction of the first wiring groove 60, reducing the messy situation such as crossing and back in the first wiring groove 60, making the line route consistent with the extension direction of the first wiring groove 60, and further optimizing the neatness of the wiring. The two connectors 300 connected to the electronic converter 20 (corresponding to the positive circuit 1 and the negative circuit 2 respectively) are arranged along the extension direction of the second wiring groove 70, which can make the lines leading to the electronic converter 20 arranged in an orderly manner along the extension direction of the second wiring groove 70, reduce the twisting or redundant length of the lines between the wire groove converter head 50 and the electronic converter 20, and improve the compactness and aesthetics of the overall layout.

[0096] Figure 17 In this configuration, the wire trough converter 50 is located in the middle of the first wiring trough 60. Its accommodating cavity 500 contains six connectors 300 arranged in a two-stage configuration. Each connector 300 has two first electrical contacts 301 and one second electrical contact 302. Four connectors 300 are located in the first stage, and two are located in the second stage. The first electrical contacts 301 of the four connectors 300 in the first stage are connected to the energy storage element 10, and the second electrical contacts 302 are connected to the first electrical contacts 301 in the second stage. They are arranged along the extension direction of the first wiring trough 60. The second electrical contacts 302 of the two connectors 300 in the second stage are connected to the electronic conversion device 20, and they are arranged along the extension direction of the second wiring trough 70.

[0097] Figure 18In the first wiring trough 60, the wire trough conversion head 50 is located in the middle position. Its accommodating cavity 500 contains six connectors 300, forming a two-stage arrangement. Four connectors 300 are located in the first stage, and two connectors 300 are located in the second stage. The first contact portion 301 of the four connectors 300 in the first stage is connected to the energy storage element 10, and the second contact portion 302 is connected to the first contact portion 301 of the second stage. Specifically, two connectors 300 each have two first contact portions 301 and one second contact portion 302, and the remaining two connectors 300 each have three first contact portions 301 and one second contact portion 302.

[0098] Figure 19 In the first wiring trough 60, the wire trough adapter 50 is located in the middle. Its accommodating cavity 500 contains six connectors 300, forming a two-stage arrangement. Four connectors 300 are located in the first stage, and two connectors 300 are located in the second stage. The first contact portion 301 of the four connectors 300 in the first stage is connected to the energy storage element 10, and the second contact portion 302 is connected to the first contact portion 301 of the second stage. The two connectors 300 in the second stage each have three first contact portions 301 and one second contact portion 302, with one of the first contact portions 301 directly connected to the energy storage element 10.

[0099] Figure 20 In this configuration, the wire trough adapter 50 is located in the middle of the first wiring trough 60. Its accommodating cavity 500 contains six connectors 300, forming a two-stage arrangement: four connectors 300 are located in the first stage, and two connectors 300 are located in the second stage. The first contact portion 301 of the four connectors 300 in the first stage is connected to the energy storage element 10, and the second contact portion 302 is connected to the first contact portion 301 of the second stage. Each of the four connectors 300 in the first stage has three first contact portions 301 and one second contact portion 302.

[0100] Please see Figure 11 and Figure 13 As shown, in some embodiments, there are multiple wire trough conversion heads 50, which are arranged at intervals on the first wiring trough 60. Among the multiple wire trough conversion heads 50, at least one wire trough conversion head 50 has a through-hole 501 that communicates with the second wiring trough 70. Each wire trough conversion head 50 is provided with at least two connectors 300. It should be understood that the arrangement direction of the wire trough conversion heads 50 is the same as the arrangement direction of the energy storage element 10, so that the outgoing wire of the energy storage element 10 can extend into the nearest wire trough conversion head 50 and connect with the first contact part 301 of the connector 300, thereby reducing the outgoing wire length of the energy storage element 10. At the same time, the connectors 300 in adjacent wire trough conversion heads 50 are connected by connecting lines 330 to form a multi-level arrangement, reducing the number of lines in the part of the first wiring trough 60 near the second wiring trough 70, avoiding line congestion, and reducing wiring difficulty.

[0101] When the power demand increases significantly, there is no need to replace the existing wire trough adapter 50. Instead, a wire trough adapter 50 can be added to the empty space of the first wire trough 60, or the empty first power connection part 301 in the existing wire trough adapter 50 can be used to flexibly expand the number of energy storage elements 10, thus breaking through the interface capacity limitation of a single wire trough adapter 50.

[0102] Please see Figure 14 As shown, in some embodiments, the wire trough adapter 50 includes a housing 502 and a cover 503. The cover 503 and the housing 502 are snap-fitted together to form a receiving cavity 500. A fixing buckle 504 is provided inside the receiving cavity 500 to fix the connector 300. The cover 503 and the housing 502 are snap-fitted together, allowing for quick assembly and disassembly of the cover 503 without tools. This facilitates the installation of the connector 300, the inspection of the wiring, or fault repair, significantly reducing the complexity of on-site operations. It should be understood that the housing 502 is fixed to the wall with bolts. It should also be understood that the first wiring trough 60 and the second wiring trough 70 are also fixed to the cavity.

[0103] Please see Figure 9 and Figure 10 As shown in the illustration, this application embodiment also provides a connector 300, which includes a housing 310 and an inner core 320. The housing 310 has a first side 311 and a second side 312. The inner core 320 is disposed within the housing 310 and forms multiple first contact portions 301 with the housing 310 on the first side 311, and forms second contact portions 302 on the second side 312. It should be understood that the connector 300 has an integrated modular design, which is simple in structure and has a busbar structure with multiple first contact portions 301 corresponding to one second contact portion 302, reducing cable arrangement and improving space utilization.

[0104] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0105] The energy storage system and connectors provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An energy storage system, characterized in that, include: At least two energy storage elements (10), each energy storage element (10) is connected to a first positive terminal (101) and a first negative terminal (102); An electronic converter (20) is provided, wherein the electronic converter (20) is connected to a second positive connector (201) and a second negative connector (202); The connecting device (30) includes at least two connectors (300), each connector (300) having a first contact portion (301) and a second contact portion (302), wherein the number of the first contact portions (301) is at least two; At least one of the connectors (300) forms a positive circuit (1) between the energy storage element (10) and the electronic conversion device (20), wherein the first contact portion (301) of the positive circuit (1) is connected to the first positive connector (101), and the second contact portion (302) is connected to the second positive connector (201). At least one of the connectors (300) forms a negative circuit (2) between the energy storage element (10) and the electronic conversion device (20), wherein the first contact part (301) of the negative circuit (2) is connected to the first negative terminal (102), and the second contact part (302) is connected to the second negative terminal (202).

2. The energy storage system according to claim 1, characterized in that, The number of connectors (300) is two, and the number of first electrical contacts (301) in each connector (300) is greater than or equal to the number of energy storage elements (10).

3. The energy storage system according to claim 1, characterized in that, The positive circuit (1) includes at least two connectors (300) and is arranged in multiple stages. In two adjacent stages, the second contact portion (302) of the connector (300) in the previous stage (41) is electrically connected to the first contact portion (301) of the connector (300) in the next stage (42). And / or, the negative circuit (2) includes at least two of the connectors (300) and is arranged in multiple stages, wherein in two adjacent stages, the second contact portion (302) of the connector (300) located in the previous stage (41) is electrically connected to the first contact portion (301) of the connector (300) located in the next stage (42).

4. The energy storage system according to claim 3, characterized in that, In two adjacent levels, the number of connectors (300) in the preceding level (41) is greater than or equal to the number of connectors (300) in the following level (42).

5. The energy storage system according to claim 4, characterized in that, In the connection device (30), there are two connectors (300) connected to the electronic conversion device (20). The second electrical contact part (302) of one connector (300) is electrically connected to the second positive connector (201), and the second electrical contact part (302) of the other connector (300) is electrically connected to the second negative connector (202).

6. The energy storage system according to claim 3, characterized in that, Both the positive circuit (1) and the negative circuit (2) include at least two of the connectors (300) and are arranged in a multi-stage manner; The connecting device (30) also includes multiple connecting lines (330), one end of which is connected to a first connector (331) and the other end is connected to a second connector (332); In the two adjacent stages of the positive circuit (1), the second contact part (302) of the connector (300) in the previous stage (41) is electrically connected to the first connector (331) of the connecting line (330), and the first contact part (301) of the connector (300) in the next stage (42) is electrically connected to the second connector (332) of the connecting line (330). In the two adjacent stages of the connector (300) in the negative circuit (2), the second contact part (302) of the connector (300) in the previous stage (41) is electrically connected to the first connector (331) of the other connecting line (330), and the first contact part (301) of the connector (300) in the next stage (42) is electrically connected to the second connector (332) of the connecting line (330).

7. The energy storage system according to any one of claims 1 to 6, characterized in that, The connector (300) includes a housing (310) and an inner core (320). The housing (310) has a first side (311) and a second side (312). The inner core (320) is disposed inside the housing (310) and forms a plurality of first contact portions (301) with the housing (310) on the first side (311) and forms a second contact portion (302) on the second side (312).

8. The energy storage system according to claim 7, characterized in that, The inner core (320) includes a first core rod (321), a second core rod (322), and a busbar (323). There are multiple first core rods (321), which are connected to one side of the busbar (323) and form multiple first contact portions (301) with the housing (310) on the first side (311). The second core rod (322) is connected to the other side of the busbar (323) and forms a second contact portion (302) with the housing (310) on the second side (312).

9. The energy storage system according to claim 8, characterized in that, The housing (310) includes a first body (313) and a second body (314). There are multiple first bodies (313), which are arranged at intervals and correspond one-to-one with multiple first core rods (321). The first core rods (321) are housed in the cavity of the first body (313), and the second core rods (322) are housed in the cavity of the second body (314).

10. The energy storage system according to claim 9, characterized in that, The first side (311) and the second side (312) are arranged along the length direction (X), and a plurality of first bodies (313) are staggered along the length direction (X).

11. The energy storage system according to claim 9, characterized in that, The first electrical connector (301) is configured as either a male or a female connector; The second electrical connector (302) is configured as either a male or a female connector.

12. The energy storage system according to claim 11, characterized in that, The connector (300) further includes a first elastic metal sleeve (340); When the first electrical contact part (301) is a male, the first elastic metal sleeve (340) is housed in the first body (313) and connected to the end of the first core rod (321) away from the second core rod (322); Alternatively, the connector (300) may further include a second elastic metal sleeve (341); when the second electrical contact (302) is a female head, the second elastic metal sleeve (341) is housed in the second body (314) and connected to the end of the second core rod (322) away from the first core rod (321).

13. The energy storage system according to claim 11, characterized in that, The connector (300) further includes a limiting section (315); When the first electrical contact part (301) is a male connector, the limiting segment (315) is disposed on the periphery of the first body (313), and there is a gap between the limiting segment (315) and the first body (313). A sealing member (350) is sleeved on the outer periphery of the first body (313). When the second electrical contact part (302) is a female connector, the limiting section (315) is provided on the periphery of the second body (314), and there is a gap between the limiting section (315) and the second body (314). A sealing member (350) is sleeved on the outer periphery of the second body (314).

14. The energy storage system according to claim 1, characterized in that, The number of first electrical contacts (301) of the connector (300) is two or three.

15. The energy storage system according to claim 1 or 14, characterized in that, The energy storage system also includes: The wire trough converter (50) has a receiving cavity (500) and at least two through ports (501), the at least two through ports (501) are located on different sides of the wire trough converter (50) and communicate with the receiving cavity (500), and the connector (300) is received in the receiving cavity (500). A first wiring groove (60) is connected to at least two energy storage elements (10) in its extending direction. The first wiring groove (60) is provided with the wiring groove conversion head (50), and at least one through port (501) is connected to the first wiring groove (60). The second wiring slot (70) is disposed between the wiring slot conversion head (50) and the electronic conversion device (20), and another through port (501) is connected to the second wiring slot (70).

16. The energy storage system according to claim 15, characterized in that, In the connecting device (30), at least two of the connectors (300) are arranged along the extension direction of the first wiring groove (60), and two of the connectors (300) connected to the electronic conversion device (20) are arranged along the extension direction of the second wiring groove (70).

17. The energy storage system according to claim 15, characterized in that, The number of the wire slot conversion heads (50) is multiple, and they are arranged at intervals on the first wiring slot (60); In the plurality of the wire trough conversion heads (50), at least one of the wire trough conversion heads (50) has a through port (501) connected to the second wiring trough (70), and each of the wire trough conversion heads (50) is provided with at least two of the connectors (300).

18. The energy storage system according to claim 15, characterized in that, The wire groove converter (50) includes a box body (502) and a cover body (503), the cover body (503) and the box body (502) are snapped together and form the receiving cavity (500); The accommodating cavity (500) is provided with a fixing buckle (504), which is used to fix the connector (300).

19. A connector, characterized in that, include: The housing (310) has a first side (311) and a second side (312). The inner core (320) is disposed inside the housing (310) and forms a plurality of first electrical contacts (301) with the housing (310) on the first side (311) and a second electrical contact (302) on the second side (312).

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