Wiring device of multi-path battery pack and energy storage system

Abstract

The utility model discloses a multi-path battery pack wiring device and an energy storage system. The wiring device comprises a first quick connection unit, a direct current bus, n second quick connection units and a first air switch unit, and n is a positive integer greater than or equal to 1; the first quick connection unit is connected to the direct-current bus through the first air switch unit, and each second quick connection unit is connected with the direct-current bus; the first quick connection unit is used for connecting a power conversion device, the second quick connection unit is used for connecting a battery pack, and the first air switch unit is disconnected when the transmitted current is detected to be greater than a preset value. According to the invention, any number of battery packs can be connected to the power conversion device of the energy storage system through the wiring device, so that when the energy storage system needs to add or reduce the battery packs, the battery packs can be quickly assembled and disassembled through the wiring device, thereby facilitating the adjustment of the battery capacity of the energy storage system, and improving the battery capacity of the energy storage system. And the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and particularly relates to a wiring device for multiple battery packs and an energy storage system. Background Art

[0002] In the prior art, generally, multiple battery packs are connected in parallel and then connected to a power conversion device to form an energy storage system. The output end of each battery pack is directly connected to the power conversion device, resulting in complex wiring. When it is necessary to increase or decrease the battery capacity of the energy storage system, it is not convenient to load and unload the battery packs, thus affecting the user experience. Summary of the Utility Model

[0003] In view of this, the present application provides a wiring device for multiple battery packs and an energy storage system, which is used to facilitate the adjustment of the battery capacity of the energy storage system and thus improve the user experience. The technical solution of the present application is as follows:

[0004] In the first aspect of the present application, a wiring device for multiple battery packs is provided, including a first quick connection unit, a DC bus, n second quick connection units, and a first air switch unit, where n is a positive integer greater than or equal to 1; the first quick connection unit is connected to the DC bus through the first air switch unit, and each second quick connection unit is connected to the DC bus; the first quick connection unit is used to connect to a power conversion device, the second quick connection unit is used to connect to a battery pack, and the first air switch unit is used to disconnect when the detected current transmitted by it is greater than a preset value.

[0005] In an embodiment of the present application, the wiring device further includes n second air switch units, and each second quick connection unit is connected to the DC bus through one of the second air switch units. The second air switch unit is used to disconnect the connection with the DC bus when the detected current transmitted by it is greater than a preset value.

[0006] In an embodiment of the present application, the first quick connection unit includes a first positive terminal and a first negative terminal. The first positive terminal is used to connect to the positive pole of the power conversion device, and the first negative terminal is used to connect to the negative pole of the power conversion device.

[0007] In an embodiment of the present application, the first air switch unit includes a first air switch and a second air switch. The positive DC bus of the DC bus is connected to the first positive terminal through the first air switch, and the negative DC bus of the DC bus is connected to the first negative terminal through the second air switch.

[0008] In an embodiment of the present application, the second quick connection unit includes a second positive terminal and a second negative terminal. The second positive terminal is used to connect to the positive pole of the battery pack, and the second negative terminal is used to connect to the negative pole of the battery pack.

[0009] In an embodiment of the present application, the second air switch unit includes a third air switch and a fourth air switch. The second positive terminal is connected to the positive DC bus of the DC bus through the third air switch, and the second negative terminal is connected to the negative DC bus of the DC bus through the fourth air switch.

[0010] In an embodiment of the present application, the wiring device further includes a first BMS interface, a second BMS interface, and a BMS communication line; the second BMS interface is connected to the first BMS interface through the BMS communication line; the first BMS interface is used to connect to the controller of the power conversion device, and the second BMS interface is used to connect to the BMS unit of the host battery pack.

[0011] The second aspect of the present application provides an energy storage system, including m battery packs, a power conversion device, and the wiring device described above. The m battery packs are connected to the second quick connection unit of the corresponding wiring device, and the power conversion device is connected to the first quick connection unit of the wiring device, where m is a positive integer less than or equal to n.

[0012] In an embodiment of the present application, the power conversion device includes an energy storage inverter.

[0013] In an embodiment of the present application, the m battery packs include at least one host battery pack. The host battery pack is connected to other battery packs through a CAN bus. The wiring device further includes a first BMS interface, a second BMS interface, and a BMS communication line. The second BMS interface is connected to the first BMS interface through the BMS communication line. The first BMS interface is connected to the controller of the power conversion device, and the BMS unit of the host battery pack is connected to the second BMS interface to obtain the BMS information of other battery packs and transmit the BMS information to the power conversion device through the second BMS interface, the BMS communication line, and the first BMS interface.

[0014] The wiring device of the present application can be applied to an energy storage system. Through this wiring device, any number of battery packs can be connected to the power conversion device of the energy storage system. Therefore, when the energy storage system needs to add or reduce battery packs, the assembly and disassembly of the battery packs can be quickly carried out through the wiring device, thereby facilitating the adjustment of the battery capacity of the energy storage system and improving the user experience. Description of the Drawings

[0015] Figure 1 It is a schematic block diagram of a wiring device 100 for multiple battery packs provided by an embodiment of the present application.

[0016] Figure 2It is a schematic block diagram of a wiring device 100a for a multi-path battery pack provided by an embodiment of the present application.

[0017] Figure 3 It is a schematic block diagram of a wiring device 100b for a multi-path battery pack provided by an embodiment of the present application.

[0018] Figure 4 It is a schematic block diagram of a wiring device 100c for a multi-path battery pack provided by an embodiment of the present application.

[0019] Figure 5 It is a schematic block diagram of an energy storage system provided by the present application. Detailed implementation manners

[0020] It should be noted that in the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. Terms such as "first", "second", "third", "fourth", etc. (if any) in the description, claims, and drawings of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0021] In addition, it should be noted that for the methods disclosed in the embodiments of the present application or shown in the flowcharts, including one or more steps for implementing the methods, without departing from the scope of the claims, the execution orders of multiple steps can be interchanged with each other, and some steps can also be deleted.

[0022] In the prior art, generally, multiple battery packs are set to be connected in parallel and then connected to a power conversion device to form an energy storage system, and the output end of each battery pack is directly connected to the power conversion device, resulting in relatively complex wiring. When it is necessary to increase or decrease the battery capacity of the energy storage system, it is not convenient to load and unload the battery packs, thus affecting the user experience.

[0023] The present application provides a wiring device for a multi-path battery pack and an energy storage system, which are used to facilitate the adjustment of the battery capacity of the energy storage system, thereby improving the user experience.

[0024] Please refer to Figure 1 , Figure 1 It is a schematic block diagram of a wiring device 100 for a multi-path battery pack provided by an embodiment of the present application. Among them, the wiring device 100 includes a first quick connection unit 110, a first air switch unit 120, a DC bus 130, and n second quick connection units 140, where n is a positive integer greater than or equal to 1.

[0025] In the embodiments of the present application, the first quick-connection unit 110 is used for detachably connecting the power conversion device 101. The DC bus 130 is connected to the first quick-connection unit 110 through the first air switch unit 120, and the first air switch unit 120 is used to disconnect the connection with the first quick-connection unit 110 when the detected current transmitted by it is greater than a preset value. Each second quick-connection unit 140 is connected to the DC bus 130, and the second quick-connection unit 140 is used for detachably connecting the battery pack 102.

[0026] It can be understood that the above wiring device can be applied to an energy storage system. Through this wiring device, any number of battery packs 102 can be connected to the power conversion device 101 of the energy storage system. Therefore, when the energy storage system needs to increase or decrease the battery pack 102, the battery pack 102 can be quickly assembled and disassembled through the wiring device, so as to facilitate the adjustment of the battery capacity of the energy storage system, thereby improving the user experience.

[0027] Moreover, through the first air switch unit 120, when the detected current is greater than the preset value, the connection with the first quick-connection unit 110 is disconnected, that is, when the first air switch unit 120 detects that the current of multiple battery packs 102 flowing into the power conversion device 101 through the DC bus 130 is too large, it disconnects, so as to protect the power conversion device 101, or when the first air switch unit 120 detects that the current of the power conversion device 101 flowing into the DC bus 130 is too large, it disconnects, so as to protect the battery pack 102, thereby improving the safety of the wiring device.

[0028] In some embodiments, the above wiring device 100 further includes a box body, that is, the wiring device forms a junction box by arranging the first quick-connection unit 110 and the second quick-connection unit 140 outside the box body, and arranging the DC bus 130 and the first air switch unit 120 inside the box body.

[0029] Please refer to Figure 2 , Figure 2 , which is a schematic block diagram of a wiring device 100a for multiple battery packs provided by the embodiments of the present application. Among them, compared with the wiring device 100, the wiring device 100a is different in that the wiring device 100a further includes n second air switch units 150.

[0030] In the embodiments of the present application, each second quick-connection unit 140 is connected to the DC bus 130 through one of the second air switch units 150, and the second air switch unit 150 is used to disconnect the connection with the DC bus 130 when the detected current transmitted by it is greater than a preset value. It can be understood that when the output current of a single battery pack 102 is too large, the second air switch unit 150 can disconnect, so as to protect the battery pack and the power conversion device 101, thereby avoiding affecting the operation of other battery packs 102.

[0031] Please refer toFigure 3 , Figure 3 It is a schematic block diagram of a wiring device 100b for a multi-channel battery pack provided by an embodiment of the present application. Among them, compared with the wiring device 100a, the wiring device 100b is different in that the first quick connection unit 110 includes a first positive terminal 111 and a first negative terminal 112. The first positive terminal 111 is used to connect to the positive electrode of the power conversion device 101, and the first negative terminal 112 is used to connect to the negative electrode of the power conversion device 102.

[0032] Among them, the first air switch unit 120 includes a first air switch 121 and a second air switch 122. The positive DC bus BUS+ is connected to the first positive terminal through the first air switch 121, and the negative DC bus BUS- of the DC bus 130 is connected to the first negative terminal through the second air switch 122.

[0033] In the embodiment of the present application, the second quick connection unit 140 includes a second positive terminal 141 and a second negative terminal 142. The second positive terminal 141 is used to connect to the positive electrode of the battery pack, and the second negative terminal 142 is used to connect to the negative electrode of the battery pack. The second air switch unit 150 includes a third air switch 151 and a fourth air switch 152. The second positive terminal 141 is connected to the positive DC bus BUS+ of the DC bus 130 through the third air switch 151, and the second negative terminal 142 is connected to the negative DC bus BUS- through the fourth air switch 152.

[0034] Please refer to Figure 4 , Figure 4 It is a schematic block diagram of a wiring device 100c for a multi-channel battery pack provided by an embodiment of the present application. Among them, compared with the wiring device 100a, the wiring device 100c is different in that it further includes a first BMS interface 150, a second BMS interface 160, and a BMS communication line 170.

[0035] In the embodiment of the present application, the first BMS interface 150 is used for detachable connection to the power conversion device. The second BMS interface 160 is connected to the first BMS interface 150 through the BMS communication line 170 and is used for detachable connection to the main battery pack 102.

[0036] Please refer to Figure 5 , Figure 5 It is a schematic block diagram of an energy storage system provided by the present application. Among them, the energy storage system 10 includes m battery packs 102, a power conversion device 101, and the wiring device 100 of any of the above embodiments.

[0037] It can be understood that the m battery packs 102 are detachably connected to the second quick-connect unit 140 of the corresponding wiring device 100 through battery connection lines, and the power conversion device 101 is detachably connected to the first quick-connect unit 110 of the wiring device 100 for the convenience of the user to replace. Herein, the above-mentioned m is a positive integer less than or equal to n.

[0038] In some embodiments, the power conversion device 101 includes an energy storage inverter. The m battery packs 102 include at least one main battery pack, and the main battery pack is connected to other battery packs through a CAN bus for obtaining the BMS information of other battery packs and transmitting it to the power conversion device 101.

[0039] In some embodiments, the m battery packs 102 include at least one main battery pack 102, and the main battery pack 102 can be connected to other battery packs 102 through a CAN bus. The wiring device 100 further includes a first BMS interface and a second BMS interface. The first BMS interface is connected to the controller of the power conversion device 101, and the BMS unit of the main battery pack 102 is connected to the second BMS interface for obtaining the BMS information of other battery packs 102 and transmitting the BMS information to the power conversion device 101 through the second BMS interface, the BMS communication line, and the first BMS interface.

[0040] The above-described embodiments are merely described in a preferred embodiment manner of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A wiring device for a multi-way battery pack, characterized in that: It includes a first quick-connect unit, a DC bus, n second quick-connect units, and a first circuit breaker unit, where n is a positive integer greater than or equal to 1; The first quick-connect unit is connected to the DC bus through the first circuit breaker unit; Each of the second quick-connect units is connected to the DC bus; The first quick-connect unit is used to connect a power conversion device, the second quick-connect unit is used to connect a battery pack, and the first circuit breaker unit is used to disconnect when it is detected that the current it transmits is greater than a preset value.

2. The wiring device according to claim 1, characterized in that The wiring device also includes n second circuit breaker units, each of which is connected to the DC bus through one of the second circuit breaker units. The second circuit breaker unit is used to disconnect from the DC bus when it detects that the current it transmits is greater than a preset value.

3. The wiring device according to claim 1, characterized in that: The first quick-connect unit includes a first positive terminal and a first negative terminal, the first positive terminal is used to connect the positive electrode of the power conversion device, and the first negative terminal is used to connect the negative electrode of the power conversion device.

4. The wiring device according to claim 3, characterized in that: The first air switch unit includes a first air switch and a second air switch. The positive DC bus of the DC bus is connected to the first positive terminal through the first air switch, and the negative DC bus of the DC bus is connected to the first negative terminal through the second air switch.

5. The wiring device according to claim 2, characterized in that: The second quick-connect unit includes a second positive terminal and a second negative terminal, the second positive terminal is used to connect the positive electrode of the battery pack, and the second negative terminal is used to connect the negative electrode of the battery pack.

6. The wiring device according to claim 5, characterized in that: The second air switch unit includes a third air switch and a fourth air switch, the second positive terminal is connected to the positive DC bus of the DC bus through the third air switch, and the second negative terminal is connected to the negative DC bus of the DC bus through the fourth air switch.

7. The wiring device according to claim 1, characterized in that: The wiring device also includes a first BMS interface, a second BMS interface and a BMS communication line; The second BMS interface is connected to the first BMS interface via the BMS communication line; The first BMS interface is used to connect to the controller of the power conversion device, and the second BMS interface is used to connect to the BMS unit of the host battery pack.

8. An energy storage system, characterized in that: It comprises m battery packs, a power conversion device and a wiring device as described in any one of claims 1 to 6, wherein the m battery packs are connected to the corresponding second quick-connect units of the wiring device, and the power conversion device is connected to the first quick-connect unit of the wiring device, wherein m is a positive integer less than or equal to n.

9. The energy storage system according to claim 8, characterized in that: The power conversion device includes an energy storage inverter.

10. The energy storage system according to claim 8, characterized in that: The m battery packs include at least one host battery pack, and the host battery pack is connected to other battery packs via a CAN bus. The wiring device also includes a first BMS interface, a second BMS interface and a BMS communication line. The second BMS interface is connected to the first BMS interface via the BMS communication line. The first BMS interface is connected to the controller of the power conversion device. The BMS unit of the host battery pack is connected to the second BMS interface for obtaining BMS information of other battery packs, and transmitting the BMS information to the power conversion device via the second BMS interface, the BMS communication line and the first BMS interface.

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