Battery cluster and energy storage system

Abstract

An energy storage system, comprising a battery cluster, which battery cluster comprises battery modules, each of which is provided with two charge-discharge ports; a first connector; a second connector; a first connecting cable; a second connecting cable; and a high-voltage box provided with a first port and a second port, wherein the first connecting cable is connected to the first connector and the first port, respectively, and the second connecting cable is connected to the second connector and the second port, respectively; the first connector and the second connector are respectively connected to two charge-discharge ports; and the first connecting cable does not cross the second connecting cable.

Description

Battery cluster and energy storage system

[0001] The present application claims priority to the Chinese patent application No. 202422244304.4, filed on September 12, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a battery cluster and an energy storage system. BACKGROUND

[0003] The battery cluster is a battery combination formed by connecting a plurality of battery monomers or modules in series, parallel or series-parallel manner, and is usually managed and used as an independent unit. In electric vehicles, smart grids and household energy storage systems, the battery cluster is an indispensable core component of the core power source or energy storage system, and through reasonable configuration and management, the overall performance and life of the system can be effectively improved. Among them, the battery cluster wiring is a key link in the energy storage system, and whether the wiring of the battery cluster is reasonable determines whether the energy storage system can operate efficiently and stably. SUMMARY

[0004] However, the wiring of the battery cluster of the energy storage system is prone to crossing, and the anti-interference performance of the energy storage system formed by the battery cluster is poor, resulting in low safety and reliability of the energy storage system.

[0005] The present application provides a battery cluster and an energy storage system, which can improve the anti-interference performance of the energy storage system, and the reliability of the energy storage system is high, ensuring that the energy storage system can operate efficiently and stably.

[0006] In a first aspect, the present application provides a battery cluster, comprising:

[0007] at least one battery module, the battery module being provided with a first charge-discharge interface and a second charge-discharge interface;

[0008] a first connector, one end of the first connector being electrically connected to the first charge-discharge interface;

[0009] a second connector, one end of the second connector being electrically connected to the second charge-discharge interface;

[0010] a first connecting line, one end of the first connecting line being electrically connected to the other end of the first connector;

[0011] a second connecting line, one end of the second connecting line being electrically connected to the other end of the second connector, and the first connecting line and the second connecting line do not cross each other;

[0012] a high-voltage box, provided with a first interface and a second interface, the first interface being electrically connected to the other end of the first connecting line, and the second interface being electrically connected to the other end of the second connecting line.

[0013] In a second aspect, the application further provides a battery cluster. Advantages

[0014] The battery cluster provided by the application comprises at least one battery module, a first connector, a second connector, a first connecting line, a second connecting line and a high-voltage box, the battery module is provided with a first charge-discharge interface and a second charge-discharge interface, the high-voltage box is provided with a first interface and a second interface, one end of the first connector is electrically connected to the first charge-discharge interface, the other end of the first connector is electrically connected to one end of the first connecting line, the other end of the first connecting line is electrically connected to the first interface, one end of the second connector is electrically connected to the second charge-discharge interface, the other end of the second connector is electrically connected to one end of the second connecting line, the other end of the second connecting line is electrically connected to the second interface, and the first connecting line and the second connecting line are respectively used as charge-discharge high-low voltage wire harnesses of the battery cluster and do not cross each other, so that the anti-interference performance of the energy storage system can be improved, the reliability of the energy storage system is higher, and efficient and stable operation of the energy storage system is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a first structural schematic view of the battery cluster provided by the application;

[0016] Fig. 2 is a second structural schematic view of the battery cluster provided by the application;

[0017] Fig. 3 is a third structural schematic view of the battery cluster provided by the application.

[0018] Explanation of reference signs:

[0019] 100, battery module; 101, first charge-discharge interface; 102, second charge-discharge interface; 103, first communication interface; 200, first connector; 300, second connector; 400, first connecting line; 500, second connecting line; 600, high-voltage box; 601, first interface; 602, second interface; 603, second communication interface; 604, third interface; 605, fourth interface; 700, third connecting line; 800, fourth connecting line; 900, fifth connecting line. Embodiments of the application

[0020] In the related art, as shown in Fig. 1, the battery cluster comprises a plurality of battery modules 100 and a high-voltage box 600, at least one battery module 100 is stacked, the high-voltage box 600 is stacked above the battery module 100, and then the remaining battery modules 100 in the battery cluster are stacked again above the high-voltage box 600 to form the battery cluster. As can be seen, the high-voltage box 600 is between two adjacent battery modules 100 in the vertical direction, that is, the high-voltage box 600 is in the middle position in the battery cluster.

[0021] At this time, after the battery modules 100 and the high-voltage box 600 in the battery cluster are stacked, the battery modules 100 are connected in series and in parallel, the charge-discharge interface (such as the first charge-discharge interface 101) of one battery module 100 is electrically connected to the first interface 601 of the high-voltage box 600 to form a high-voltage wire harness of the battery cluster, and the charge-discharge interface (such as the second charge-discharge interface 102) of another battery module 100 is electrically connected to the second interface 602 of the high-voltage box 600 to form a low-voltage wire harness of the battery cluster.

[0022] However, as can be seen from FIG. 1, after the charge-discharge interface (such as the first charge-discharge interface 101) of one battery module 100 is electrically connected to the first interface 601 of the high-voltage box 600 to form a high-voltage wire harness, the high-voltage wire harness actually intersects with a low-voltage wire harness formed after the charge-discharge interface (such as the second charge-discharge interface 102) of another battery module 100 is electrically connected to the second interface 602 of the high-voltage box 600, that is, the first connecting line 400 intersects with the second connecting line 500. After the high-voltage wire harness and the low-voltage wire harness of the battery cluster intersect, the anti-interference performance of the energy storage system formed by the battery cluster is poor, and the safety and reliability of the energy storage system are low.

[0023] Therefore, the present application provides a battery cluster including at least one battery module 100, a first connector 200, a second connector 300, a first connecting line 400, a second connecting line 500, and a high-voltage box 600. The battery module 100 is provided with a first charge-discharge interface 101 and a second charge-discharge interface 102, and the high-voltage box 600 is provided with a first interface 601 and a second interface 602. One end of the first connector 200 is electrically connected to the first charge-discharge interface 101, the other end of the first connector 200 is electrically connected to one end of the first connecting line 400, the other end of the first connecting line 400 is electrically connected to the first interface 601, one end of the second connector 300 is electrically connected to the second charge-discharge interface 102, the other end of the second connector 300 is electrically connected to one end of the second connecting line 500, and the other end of the second connecting line 500 is electrically connected to the second interface 602. The first connecting line 400 and the second connecting line 500 are respectively used as charge-discharge high-voltage and low-voltage wire harnesses of the battery cluster and do not intersect, which can improve the anti-interference performance of the energy storage system, the reliability of the energy storage system is high, and the energy storage system can be efficiently and stably operated.

[0024] Please refer to FIG. 2 and FIG. 3, FIG. 2 is a second structural schematic diagram of the battery cluster provided by the present application; and FIG. 3 is a third structural schematic diagram of the battery cluster provided by the present application.

[0025] As shown in FIG. 2 and FIG. 3, the present application provides a battery cluster, which includes:

[0026] at least one battery module 100, the battery module 100 being provided with a first charge-discharge interface 101 and a second charge-discharge interface 102;

[0027] The first connector 200 has one end electrically connected to the first charge-discharge interface 101.

[0028] The second connector 300 has one end electrically connected to the second charge-discharge interface 102.

[0029] The first connecting line 400 has one end electrically connected to the other end of the first connector 200.

[0030] The second connecting line 500 has one end electrically connected to the other end of the second connector 300, and the first connecting line 400 and the second connecting line 500 do not cross each other.

[0031] The high-voltage box 600 is provided with a first interface 601 and a second interface 602, the first interface 601 is electrically connected to the other end of the first connecting line 400, and the second interface 602 is electrically connected to the other end of the second connecting line 500.

[0032] Specifically, in the vertical direction, the high-voltage box 600 mentioned in the present application is not between two battery modules 100, and the battery modules 100 are above or below the high-voltage box 600, that is, the high-voltage box 600 is stacked above the battery modules 100 of the battery cluster, and the high-voltage box 600 is not stacked above other battery modules 100 of the battery cluster, or the high-voltage box 600 is stacked above the battery modules 100 of the battery cluster, and other battery modules 100 of the battery cluster are not stacked above the high-voltage box 600. Wherein, the battery module 100 can be a battery pack.

[0033] One end of the first connector 200 of the battery cluster is electrically connected to the first charge-discharge interface 101 of the battery module 100, the other end of the first connector 200 is electrically connected to the first interface 601 of the high-voltage box 600 through the first connecting line 400, one end of the second connector 300 of the battery cluster is electrically connected to the second charge-discharge interface 102 of the battery module 100, and the other end of the second connector 300 is electrically connected to the second interface 602 of the high-voltage box 600 through the second connecting line 500.

[0034] At this time, it can be seen that the first connecting line 400 (which can be understood as a high-voltage wire harness, that is, a wire harness at the positive pole of the charge-discharge interface on the high-voltage box 600) and the second connecting line 500 (which can be understood as a low-voltage wire harness, that is, a wire harness at the negative pole of the charge-discharge interface on the high-voltage box 600) do not cross each other, which can avoid the poor anti-interference performance of the battery cluster and the energy storage system of the battery cluster due to the crossing of the high-voltage wire harness and the low-voltage wire harness during operation, thereby improving the reliability of the battery cluster and the energy storage system, and ensuring efficient and stable operation of the battery cluster and the energy storage system.

[0035] The first charge-discharge interface 101 can be understood as the positive electrode of the battery cell in the battery module 100, and the second charge-discharge interface 102 can be understood as the negative electrode of the battery cell in the battery module 100.

[0036] When the battery cluster includes a plurality of battery modules 100, one end of the first connector 200 is electrically connected to the first charge-discharge interface 101 of one battery module 100 in the battery cluster, the other end of the second connector 300 is electrically connected to the second charge-discharge interface 102 of another battery module 100 in the battery cluster, and the first charge-discharge interface 101 and the second charge-discharge interface 102 are used to connect the adjacent two battery modules 100 in series.

[0037] Alternatively, when the battery cluster includes a plurality of battery modules 100, one end of the first connector 200 can be electrically connected to the first charge-discharge interface 101 of all battery modules 100 in the battery cluster, the other end of the second connector 300 is electrically connected to the second charge-discharge interface 102 of all battery modules 100 in the battery cluster, and the first charge-discharge interface 101 and the second charge-discharge interface 102 are electrically connected between the battery modules 100 to realize parallel connection between the battery modules 100.

[0038] In some embodiments, as shown in FIGS. 2 and 3, the battery cluster further includes a third connecting line 700; one end of the third connecting line 700 is electrically connected to one end of the first connector 200, and the other end of the third connecting line 700 is electrically connected to the first charge-discharge interface 101; the third connecting line 700 and the second connecting line 500 do not cross each other.

[0039] In this embodiment, the third connecting line 700 is used to electrically connect the first connector 200 and the first charge-discharge interface 101, and the third connecting line 700 can also be understood as a high-voltage wire harness, that is, a wire harness at the positive electrode of the charge-discharge interface of the battery module.

[0040] By not crossing the third connecting line 700 and the second connecting line 500, the crossing between the high-voltage wire harness and the low-voltage wire harness of the battery cluster can be avoided, thereby improving the reliability of the battery cluster and the energy storage system, and ensuring that the battery cluster and the energy storage system can operate efficiently and stably.

[0041] In some embodiments, as shown in FIGS. 2 and 3, the battery cluster further includes a fourth connecting line 800; one end of the fourth connecting line 800 is electrically connected to one end of the second connector 300, and the other end of the fourth connecting line 800 is electrically connected to the second charge-discharge interface 102; the fourth connecting line 800 and the first connecting line 400 do not cross each other.

[0042] In the embodiment, the fourth connecting line 800 is electrically connected between the second connector 300 and the second charge-discharge interface 102. The fourth connecting line 800 can also be understood as a low-voltage wire harness, that is, a wire harness at the negative pole of the charge-discharge interface of the battery module.

[0043] By not crossing between the fourth connecting line 800 and the first connecting line 400, the crossing between the high-voltage wire harness and the low-voltage wire harness of the battery cluster can be avoided, the reliability of the battery cluster and the energy storage system can be improved, and efficient and stable operation of the battery cluster and the energy storage system is ensured.

[0044] It should be noted that the first connecting line 400 and the third connecting line 700 do not cross the second connecting line 500 and the fourth connecting line 800, which can ensure efficient and stable operation of the battery cluster.

[0045] In some embodiments, as shown in FIG. 2, the battery module 100 is stacked above the high-voltage box 600.

[0046] Specifically, the battery module 100 in the battery cluster is stacked above the high-voltage box 600, and the high-voltage box 600 is not stacked above the battery module 100 in the battery cluster, so that when the high-voltage box 600 is electrically connected between the battery module 100 in the battery cluster, the high-voltage wire harness and the low-voltage wire harness of the battery cluster do not cross, which can improve the reliability of the battery cluster and the energy storage system, and ensure efficient and stable operation of the battery cluster and the energy storage system.

[0047] In some embodiments, as shown in FIG. 2, the battery cluster includes a plurality of battery modules 100, and the plurality of battery modules 100 are stacked above the high-voltage box 600.

[0048] In the embodiment, there are a plurality of battery modules 100 in the battery cluster, and all the battery modules 100 in the battery cluster are stacked above the high-voltage box 600, so that when the high-voltage box 600 is electrically connected between the battery module 100 in the battery cluster, the high-voltage wire harness and the low-voltage wire harness of the battery cluster do not cross.

[0049] In addition, the high-voltage box 600 is in a lower position in the battery cluster. Since most of the devices in the high-voltage box 600 are not fragile devices, when a damaged device is found in the high-voltage box 600, the maintenance personnel of the battery cluster can avoid using heightening equipment for maintenance and replacement, thereby reducing the maintenance difficulty of the high-voltage box 600 and improving the safety of the maintenance personnel.

[0050] In some embodiments, as shown in FIG. 3, the high-voltage box 600 is stacked above the battery module 100.

[0051] Specifically, the high-voltage box 600 is stacked above the battery modules 100 in the battery cluster, and no battery module 100 in the battery cluster is stacked above the high-voltage box 600, so that the high-voltage box 600 does not cross the high-voltage wire harness and the low-voltage wire harness of the battery cluster when electrically connecting between the battery modules 100 in the battery cluster, and the reliability of the battery cluster and the energy storage system is high, and the efficient and stable operation of the battery cluster and the energy storage system is ensured.

[0052] In some embodiments, as shown in FIG. 2, the battery cluster includes a plurality of battery modules 100, and the high-voltage box 600 is stacked above the plurality of battery modules 100.

[0053] In this embodiment, there are a plurality of battery modules 100 in the battery cluster, and after all the battery modules 100 in the battery cluster are stacked, the high-voltage box 600 is stacked above the uppermost battery module 100, so that the high-voltage box 600 does not cross the high-voltage wire harness and the low-voltage wire harness of the battery cluster when electrically connecting between the battery modules 100 in the battery cluster.

[0054] In some embodiments, as shown in FIGS. 2 and 3, the battery module 100 is further provided with a first communication interface 103, the high-voltage box 600 is provided with a second communication interface 603, and the first communication interface 103 is electrically connected with the second communication interface 603.

[0055] Specifically, after the first communication interface 103 is electrically connected with the second communication interface 603, the charge and discharge information of the battery modules 100 in the battery cluster can be transmitted to the battery management system through the high-voltage box 600 to realize communication with the battery management system.

[0056] The low-voltage communication of the battery cluster can rely on CAN and RS485 communication protocols, and efficient and stable information exchange and control between the battery cluster and the battery management system can be realized through the CAN and RS485 communication protocols, and information transmission and control between the battery clusters of the energy storage system can also be ensured.

[0057] In some embodiments, as shown in FIGS. 2 and 3, the battery cluster includes a plurality of battery modules 100, and the first communication interfaces 103 of the plurality of battery modules 100 are electrically connected.

[0058] In this embodiment, after the first communication interfaces 103 of the battery modules 100 are electrically connected, the second communication interface 603 on the high-voltage box 600 can be electrically connected, and communication with the battery management system can be realized through the high-voltage box 600, efficient and stable information exchange and control between the battery cluster and the battery management system can be realized, and information transmission and control between the battery clusters of the energy storage system can also be ensured.

[0059] In some embodiments, as shown in FIGS. 2 and 3, the high-voltage box 600 is further provided with a third interface 604 and a fourth interface 605, which are electrically connected to the target device, respectively.

[0060] In the present embodiment, the target device can be an energy storage converter, which can control the charging and discharging process of the power supply branch, perform AC-DC conversion, and directly supply power to an AC load in the absence of a power grid.

[0061] In addition, the present application can further provide a disconnector between the energy storage converter and the high-voltage box 600, which can disconnect the main circuit of the energy storage system in which the battery cluster is located when the high-voltage box 600 cannot be disconnected, thereby ensuring the safety performance of the energy storage system.

[0062] In some embodiments, as shown in FIGS. 2 and 3, the battery cluster further includes a plurality of fifth connecting lines 900 and a plurality of battery modules 100; one end of each third connecting line is electrically connected to the first charging and discharging interface 101 of one battery module 100, and the other end of each fifth connecting line 900 is electrically connected to the second charging and discharging interface 102 of another battery module 100, and the number difference between the fifth connecting line 900 and the battery module 100 is a preset number.

[0063] In the present embodiment, since the third interface 604 and the fourth interface 605 of the high-voltage box 600 need to be electrically connected to the target device, the target device can be an energy storage converter, and therefore the energy storage converter and the high-voltage box 600 also have high-voltage wiring harnesses and low-voltage wiring harnesses.

[0064] When the battery modules 100 in the battery cluster are stacked above the high-voltage box 600 and the high-voltage box 600 is not stacked above the battery modules 100 in the battery cluster, the first charging and discharging interface 101 of the uppermost battery module 100 needs to be electrically connected to the first interface 601 of the high-voltage box 600 through the first connector 200, and the second charging and discharging interface 102 of the battery module 100 adjacent to the high-voltage box 600 needs to be electrically connected to the second interface 602 of the high-voltage box 600 through the second connector 300, at this time, the first connector 200, the second connector 300, and the high-voltage wiring harnesses and the low-voltage wiring harnesses of the energy storage converter can be the shortest, compared with the arrangement of the high-voltage wiring harnesses and the low-voltage wiring harnesses in FIG. 1, the first preset length can be reduced, and the first preset length can be 3 m.

[0065] When the high-voltage box 600 is stacked above the battery modules 100 in the battery cluster and there is no battery module 100 in the battery cluster stacked above the high-voltage box 600, the first charge-discharge interface 101 of the battery module 100 adjacent to the high-voltage box 600 needs to be electrically connected to the first interface 601 of the high-voltage box 600 through the first connector 200, and the second charge-discharge interface 102 of the lowermost battery module 100 needs to be electrically connected to the second interface 602 of the high-voltage box 600 through the second connector 300. At this time, the first connector 200, the second connector 300, and the high-voltage wire harness and the low-voltage wire harness at the energy storage converter can be the shortest, compared with the arrangement of the high-voltage wire harness and the low-voltage wire harness in FIG. 1, a second preset length needs to be added, and the second preset length can be 2 m.

[0066] As can be seen, when the high-voltage box 600 is stacked above the battery modules 100 in the battery cluster and there is no battery module 100 in the battery cluster stacked above the high-voltage box 600, although the cost of the high-voltage wire harness and the low-voltage wire harness is increased, the reliability of the battery cluster and the energy storage system can still be improved, and the efficient and stable operation of the battery cluster and the energy storage system is ensured.

[0067] In some embodiments, the present application also provides an energy storage system, which comprises the battery cluster provided by the present application.

[0068] The energy storage system provided by the present application can be formed by series and parallel connection of a plurality of battery clusters.

[0069] In some embodiments, the energy storage system can comprise a plurality of battery clusters, a first bus bar and a second bus bar. After parallel connection of the plurality of battery clusters, the third interface 604 of each battery cluster is electrically connected to a target device through the first bus bar, and the fourth interface 605 of each battery cluster is electrically connected to the target device through the second bus bar.

[0070] The battery cluster and the energy storage system provided by the application, the battery cluster comprises at least one battery module 100, a first connector 200, a second connector 300, a first connecting line 400, a second connecting line 500 and a high-voltage box 600, the battery module 100 is provided with a first charging and discharging interface 101 and a second charging and discharging interface 102, the high-voltage box 600 is provided with a first interface 601 and a second interface 602, one end of the first connector 200 is electrically connected with the first charging and discharging interface 101, the other end of the first connector 200 is electrically connected with one end of the first connecting line 400, the other end of the first connecting line 400 is electrically connected with the first interface 601, one end of the second connector 300 is electrically connected with the second charging and discharging interface 102, the other end of the second connector 300 is electrically connected with one end of the second connecting line 500, the other end of the second connecting line 500 is electrically connected with the second interface 602, the first connecting line 400 and the second connecting line 500 are respectively used as the charging and discharging high and low voltage wire harness of the battery cluster and do not cross, the anti-interference property of the energy storage system can be improved, the reliability of the energy storage system is higher, and it is ensured that the energy storage system can operate efficiently and stably.

Claims

1. A battery cluster, comprising: at least one battery module (100) provided with a first charge-discharge interface (101) and a second charge-discharge interface (102); a first connector (200) having one end electrically connected to the first charge-discharge interface (101); a second connector (300) having one end electrically connected to the second charge-discharge interface (102); a first connecting line (400) having one end electrically connected to the other end of the first connector (200); a second connecting line (500) having one end electrically connected to the other end of the second connector (300), and the first connecting line (400) and the second connecting line (500) do not cross each other; a high-voltage box (600) provided with a first interface (601) and a second interface (602), the first interface (601) is electrically connected to the other end of the first connecting line (400), and the second interface (602) is electrically connected to the other end of the second connecting line (500). 2.The battery cluster of claim 1, further comprising a third connecting line (700); wherein one end of the third connecting line (700) is electrically connected to one end of the first connector (200), and the other end of the third connecting line (700) is electrically connected to the first charge-discharge interface (101), and the third connecting line (700) and the second connecting line (500) do not cross each other. 3.The battery cluster of claim 1, further comprising a fourth connecting line (800); wherein, one end of the fourth connecting line (800) is electrically connected to one end of the second connector (300), and the other end of the fourth connecting line (800) is electrically connected to the second charge-discharge interface (102), and the fourth connecting line (800) and the first connecting line (400) do not cross each other.

4. The battery cluster of claim 1, wherein, A plurality of battery modules (100) are stacked above the high-voltage box (600).

5. The battery cluster of claim 1, wherein, The high-voltage box (600) is stacked above a plurality of battery modules (100).

6. The battery string of any one of claims 1-5, wherein, The battery module (100) is further provided with a first communication interface (103), the high-voltage box (600) is provided with a second communication interface (603), and the first communication interface (103) and the second communication interface (603) are electrically connected.

7. The battery cluster of claim 6, wherein, A plurality of first communication interfaces (103) of the battery modules (100) are electrically connected.

8. The battery string of any one of claims 1-5, wherein, The high-voltage box (600) is further provided with a third interface (604) and a fourth interface (605), and the third interface (604) and the fourth interface (605) are respectively electrically connected to target devices. 9.The battery cluster of any one of claims 1-5, further comprising a plurality of fifth connecting lines (900). wherein One end of each of the third connections is electrically connected to a first charge-discharge interface (101) of one of the battery modules (100), and the other end of each of the fifth connection lines (900) is electrically connected to a second charge-discharge interface (102) of another of the battery modules (100), and the number difference between the fifth connection lines (900) and the battery modules (100) is a preset number.

10. An energy storage system comprising the battery cluster of any one of claims 1-9.

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