Energy storage system

Abstract

The utility model discloses an energy storage system, and the system comprises at least one battery cluster, each battery cluster comprises a plurality of energy storage batteries PACK, and the battery clusters are disposed in a battery cabin; at least one PCS module, wherein each PCS module is connected with at least one battery cluster; the at least one PCS module is arranged at one of the top, the bottom and the side part of the battery cabin; at least one PCS thermal management device, wherein each PCS thermal management device is used for adjusting the temperature of the corresponding PCS module; and the at least one PCS heat management device is arranged at one of the top, the bottom and the side part of the battery cabin. The scheme can effectively utilize the space and reduce the occupied area of the energy storage system.

Description

Technical Field

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

[0002] Energy storage systems play an increasingly important role in modern energy management. They can not only balance the supply and demand of the power grid, but also improve the flexibility and stability of the power system.

[0003] However, with the development of technology and the increase in actual demand, the size of energy storage systems has become larger and larger, and the floor space occupied has also increased. In scenarios with limited space, it may be impossible to install an energy storage system that meets the needs. Utility Model Content

[0004] This specification provides an energy storage system.

[0005] This specification provides an energy storage system, which includes:

[0006] At least one battery cluster, each battery cluster including a plurality of energy storage battery PACKs, and the battery clusters are arranged inside the battery compartment;

[0007] At least one PCS module, each PCS module being connected to at least one battery cluster; at least one PCS module being disposed at one of the top, bottom, and side of the battery compartment;

[0008] At least one PCS thermal management device, each PCS thermal management device is used to adjust the temperature of the corresponding PCS module; at least one PCS thermal management device is arranged at one of the top, bottom, and side of the battery compartment.

[0009] In one possible implementation, the PCS thermal management device uses a heat exchanger;

[0010] The corresponding two energy storage battery PACKs in the two battery clusters are placed back to back;

[0011] Each PCS module is connected to two battery clusters arranged back to back;

[0012] Each PCS thermal management device is disposed on the left or right side of the corresponding PCS module.

[0013] In one possible implementation, the PCS thermal management device uses a heat exchanger;

[0014] The corresponding two energy storage battery PACKs in the two battery clusters are placed back to back;

[0015] All PCS modules are placed side by side; each PCS module is connected to two battery clusters placed back to back;

[0016] Each PCS thermal management device is arranged above or below the corresponding PCS module.

[0017] In one possible implementation, at least one PCS module and at least one PCS thermal management device are configured inside a PCS compartment, and the PCS compartment is disposed at one of the top, bottom, and side of the battery compartment;

[0018] The battery compartment and PCS compartment are located in the same cabinet, or,

[0019] The battery compartment is located in the first cabinet, and the PCS compartment is located in the second cabinet. The first cabinet and the second cabinet are two independent cabinets.

[0020] In one possible implementation, the energy storage system further includes:

[0021] Battery compartment thermal management equipment, which is used to regulate the temperature inside the battery compartment;

[0022] The battery compartment thermal management device is decoupled from the PCS thermal management device.

[0023] In a possible implementation, the heat exchanger is a wind-to-water heat exchanger or an air-to-air heat exchanger.

[0024] In one possible implementation, the wind-water heat exchanger uses a microchannel heat exchanger or a tube-fin heat exchanger;

[0025] The air-to-air heat exchanger uses a fin heat exchanger.

[0026] In one possible implementation, the PCS thermal management device uses a liquid cooler;

[0027] The corresponding two energy storage battery PACKs in the two battery clusters are placed back to back;

[0028] Every two PCS modules are placed back to back, and all PCS modules placed back to back are stacked vertically.

[0029] In one embodiment, at least one PCS module is disposed inside a PCS compartment; the PCS compartment is disposed on a side of the battery compartment;

[0030] The battery compartment and PCS compartment are located in the same cabinet, or,

[0031] The battery compartment is located in the first cabinet, and the PCS compartment is located in the second cabinet. The first cabinet and the second cabinet are two independent cabinets.

[0032] In one possible implementation, the energy storage system further includes:

[0033] at least one high voltage box;

[0034] Each PCS module is connected to at least one battery cluster, including: each PCS module is correspondingly connected to at least one high-voltage box, and each high-voltage box is correspondingly connected to at least one battery cluster.

[0035] Compared with the prior art, this application has the following beneficial effects:

[0036] This solution places the PCS module and PCS thermal management module at one of the top, bottom, and sides of the battery compartment, which can effectively utilize space, reduce the area occupied by the energy storage system, and make the entire energy storage system more compact and suitable for scenarios with limited space.

[0037] Furthermore, separating the PCS module from the battery compartment facilitates maintenance and upgrades of the energy storage system. Furthermore, since the PCS module and battery compartment are independent of each other, maintenance on one part will not affect the normal operation of the other, thus reducing energy storage system downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A schematic diagram of the structure of the energy storage system provided in an embodiment of the present application;

[0040] Figure 2 Another structural diagram of the energy storage system provided in an embodiment of the present application;

[0041] Figure 3 Another structural schematic diagram of the energy storage system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position 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 element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0046] Reference Figure 1-Figure 3 , which shows a structural schematic diagram of an energy storage system provided in this specification.

[0047] like Figure 1-Figure 3 As shown, this specification provides an energy storage system, which may include:

[0048] At least one battery cluster 10, each battery cluster 10 includes a plurality of energy storage battery packs, and the battery cluster 10 is disposed inside the battery compartment;

[0049] At least one PCS module 20, each PCS module 20 is connected to at least one battery cluster 10; at least one PCS module 20 is disposed at one of the top, bottom, and side of the battery compartment;

[0050] At least one PCS thermal management device 30 , each PCS thermal management device 30 is used to adjust the temperature of the corresponding PCS module 20 ; at least one PCS thermal management device 30 is disposed at one of the top, bottom, and side of the battery compartment.

[0051] It is understandable that the energy storage system also includes:

[0052] at least one high voltage box 40;

[0053] The connection between each PCS module 20 and at least one battery cluster 10 includes: each PCS module 20 is correspondingly connected to at least one high-voltage box 40 , and each high-voltage box 40 is correspondingly connected to at least one battery cluster 10 .

[0054] Specifically, the energy storage system includes at least one battery cluster 10. Each battery cluster 10 is composed of K battery arrays, and each battery array is composed of M packs out of N packs. K, N, and M can be set according to actual needs. For example, K = 1, M = 8, and N = 96. All battery clusters 10 are configured inside the battery compartment.

[0055] In the energy storage system provided in this application, every Q battery clusters 10 is connected to a corresponding high-voltage box 40, and every L high-voltage boxes 40 is connected to a corresponding PCS module 20. Q and L can be set to natural numbers greater than or equal to 1 based on actual needs. In other words, the number of battery clusters 10 and high-voltage boxes 40 associated with each PCS module 20 is not fixed but configurable. This application uses the example of one PCS module 20 associated with one high-voltage box 40 and two battery clusters 10.

[0056] The PCS thermal management device 30 adjusts the temperature of the PCS module 20. It is understandable that the number of PCS thermal management devices 30 can be configured for each PCS module 20 according to actual needs. For example, one PCS thermal management device 30 can be configured for each PCS module 20, two PCS thermal management devices 30 can be configured for each PCS module 20, and three PCS thermal management modules can be configured for two PCS modules 20. Figure 1 , it is also possible to configure seven PCS thermal management modules for six PCS modules 20, which is not limited here. Among them, at least one PCS module 20 is set on the top of the battery compartment (see Figure 1 ), bottom (not shown), side (see Figure 2 、 Figure 3 , all shown with the left side as an example). It can be understood that the side portion can include the left side or the right side.

[0057] The PCS thermal management device 30 can use a heat exchanger or a liquid cooler to regulate the temperature of the PCS module 20. As will be appreciated, using a heat exchanger to regulate the temperature of the PCS module 20 is less efficient than using a fan and consumes less energy than using an air conditioner. Alternatively, the heat exchanger can be a wind-to-water heat exchanger or an air-to-air heat exchanger.

[0058] The wind-water heat exchanger adopts a microchannel heat exchanger or a tubular fin heat exchanger. Exemplarily, the wind-water heat exchanger may include an external circulation heat exchange portion and an internal circulation heat exchange portion, and a coolant pipe, i.e., a channel through which the coolant flows. The coolant flows through the internal circulation heat exchange portion and the external circulation heat exchange portion via the coolant pipe. The coolant flowing through the internal circulation heat exchange portion absorbs the heat of the PCS module 20, i.e., the internal circulation heat exchange portion exchanges heat with the PCS module 20, and then flows into the external circulation heat exchange portion. The coolant brings the heat to the external circulation heat exchange portion, and then exchanges heat with the air in the external environment of the PCS module 20 through the external circulation heat exchange portion. Finally, the heat generated by the PCS module 20 is dissipated to the external environment of the PCS module 20, and the temperature of the PCS module 20 is reduced. The coolant may be high-purity water, ethylene glycol, or ammonia water, etc.

[0059] The air-to-air heat exchanger uses a fin heat exchanger. Exemplarily, the air-to-air heat exchanger includes an internal heat exchange portion and an external heat exchange portion. The internal heat exchange portion is connected to the PCS module 20 and is used to absorb heat generated by the PCS module 20 and transfer it to the external heat exchange portion through heat exchange. The external heat exchange portion is used to exchange heat with the environment outside the PCS module 20. Ultimately, the heat generated by the PCS module 20 is dissipated to the environment outside the PCS module 20, reducing the temperature of the PCS module 20.

[0060] It is understandable that the PCS thermal management device 30 may further include a fan.

[0061] In some possible implementations, the PCS thermal management device 30 employs a heat exchanger;

[0062] The corresponding two energy storage battery PACKs in the two battery clusters 10 are placed back to back;

[0063] Each PCS module 20 is connected to two battery clusters 10 arranged back to back;

[0064] Each PCS thermal management device 30 is disposed on the left or right side of the corresponding PCS module 20 .

[0065] In yet other possible implementations, the PCS thermal management device 30 employs a heat exchanger;

[0066] The corresponding two energy storage battery PACKs in the two battery clusters 10 are placed back to back;

[0067] All PCS modules 20 are placed side by side; each PCS module 20 is connected to two battery clusters 10 arranged back to back;

[0068] Each PCS thermal management device 30 is disposed above or below a corresponding PCS module 20 .

[0069] Specifically, such as Figure 1 As shown, in the battery compartment, every two PACKs are placed back to back, that is, the corresponding two battery clusters 10 are placed back to back, and the two battery clusters 10 placed back to back are connected to a PCS module 20. The PCS thermal management device 30 is located on the left or right side of the PCS module 20. This design can save ground space, which is especially important for application scenarios with limited space; and placing the PCS thermal management device 30 next to the PCS module 20 can simplify the layout of the cooling pipeline, reduce the pipeline length and the number of elbows, reduce fluid resistance, and improve the efficiency of the thermal management system.

[0070] Or, as Figure 3 As shown, every two PACKs are placed back to back, that is, the corresponding two battery clusters 10 are placed back to back, and the two battery clusters 10 placed back to back are connected to a PCS module 20. All PCS modules 20 are placed side by side, and the PCS thermal management device 30 can be located above or below the PCS. In this way, when the height space is limited, the PCS thermal management device 30 and the PCS module 20 can be set on the side of the battery compartment, and the PCS thermal management device 30 can be set above or below the PCS module 20 to reduce the ground space occupied.

[0071] In some possible implementations, the energy storage system may further include:

[0072] Battery compartment thermal management equipment, which is used to regulate the temperature inside the battery compartment;

[0073] When the PCS thermal management device 30 uses a heat exchanger to adjust the temperature of the PCS module 20 , based on the above embodiment, the battery compartment thermal management device and the PCS thermal management device 30 are decoupled.

[0074] Since the optimal operating temperature range for energy storage batteries is 20°C to 30°C, and the temperature difference between each cell should not exceed 5°C, otherwise its service life will be significantly affected, the battery compartment thermal management device can be air-cooled or liquid-cooled, without limitation. Therefore, the battery compartment thermal management device and the PCS thermal management device 30 are decoupled, operating and managing independently. This enables more precise thermal management of the energy storage system and reduces its energy consumption.

[0075] Furthermore, the battery compartment may also include a corresponding fire protection system, and the location of the fire protection system may be set according to actual needs.

[0076] At least one PCS thermal management device 30 is provided on top of the battery compartment (see Figure 1 ), bottom (not shown), side (see Figure 3 , taking the left side as an example). It can be understood that the side portion can include the left side or the right side.

[0077] In some possible implementations, at least one PCS module 20 and at least one PCS thermal management device 30 are disposed within a PCS compartment, which is located at one of the top, bottom, or side of the battery compartment. The battery compartment and PCS compartment are located in the same cabinet, or the battery compartment is located in a first cabinet and the PCS compartment is located in a second cabinet, with the first and second cabinets being separate.

[0078] Specifically, according to actual needs and different application scenarios, the PCS compartment and battery compartment can be located in the same cabinet or in different cabinets (refer to Figure 3 When located in the same cabinet, the system has a high degree of integration, reduces the system footprint, and facilitates installation and commissioning. When located in different cabinets, the optimal installation location can be selected based on actual conditions, and the battery capacity can be flexibly configured according to actual needs, reducing maintenance difficulty.

[0079] When the PCS compartment and the battery compartment are located in the same cabinet, and the PCS compartment is located on the top or bottom of the battery compartment, the arrangement of the PCS module 20 and the PCS thermal management device 30 can refer to Figure 1 The PCS compartment is located at the bottom of the battery compartment. The PCS compartment is located on the left or right side of the battery compartment. When the PCS compartment is located on the side of the battery compartment, the PCS modules 20 can be placed side by side in the PCS compartment. The rest of the placement is similar to that in the above embodiment.

[0080] The PACK and battery compartment thermal management equipment are placed in the battery compartment, and the PCS module 20 and PCS thermal management equipment 30 are placed in the PCS compartment. A special heat dissipation system can be designed according to the different heat dissipation requirements of the PACK and PCS module 20, thereby improving the heat dissipation efficiency.

[0081] In some possible implementations, such as Figure 2 As shown, the PCS thermal management equipment uses a liquid cooler;

[0082] The corresponding two energy storage battery PACKs in the two battery clusters 10 are placed back to back;

[0083] Every two PCS modules 20 are placed back to back, and all the PCS modules 20 placed back to back are stacked vertically.

[0084] Furthermore, at least one PCS module 20 is disposed inside the PCS compartment; the PCS compartment is disposed on the side of the battery compartment;

[0085] The battery compartment and the PCS compartment are located in the same cabinet, or the battery compartment is located in a first cabinet, and the PCS compartment is located in a second cabinet, and the first cabinet and the second cabinet are two independent cabinets.

[0086] Specifically, the PCS thermal management device uses a liquid cooler, which can be shared with the battery compartment thermal management device, or each can use its own corresponding liquid cooler separately, without limitation. Figure 2 In the system, the PCS thermal management equipment and the battery compartment thermal management equipment share a liquid cooler.

[0087] It is also understandable that the PCS thermal management device can also use a heat exchanger and a liquid cooler at the same time. When the heat exchanger does not have a good cooling effect on the PCS module, the liquid cooler can be used to cool the PCS module.

[0088] Stacking PCS modules back to back vertically can reduce the floor space. Figure 1-3 In the energy storage system shown, assuming each cell has a capacity of 314Ah and a rated voltage of 3.2V, each pack consists of 52 cells connected in series. Eight packs form a cluster, and a 1P (1P) cluster contains 416 cells. The energy storage system has 12 clusters (the packs are placed back-to-back, with six additional clusters on the back). Therefore, 0.314*3.2*12*416 ≈ 5000KW ≈ 5MW.

[0089] Specific application scenarios such as Figure 1 As shown, the energy storage system is a boost integrated cabin, so the energy storage system can also include a boost transformer, a PCS module 20 and a PCS thermal management device 30 placed above the battery cabin (see Figure 1 ), in the battery compartment of the energy storage system, every two PACKs are placed back to back, and 8 PACKs form a column, which is a battery cluster 10. Each PCS module 20 is connected to two corresponding high-voltage boxes 40, and each high-voltage box 40 is connected to the total output voltage line of each battery cluster 10. Each PCS module 20 has a corresponding PCS thermal management device 30 to dissipate heat for it. It is understandable that the PCS thermal management device 30 can be located on the left or right side of the PCS module 20; or, the PCS thermal management device 30 can be located in front of or behind the PCS module 20 (not shown in the figure). In this case, each PCS module 20 is placed side by side, so that it can be consistent with the length of the PACK, saving space. The total output of each battery cluster 10 is connected to a high-voltage box 40, which is located above each battery cluster 10. It is understandable that the high-voltage box 40 is placed on the same side as the PCS module 20 as much as possible to reduce the cable length between the two. The high-voltage box 40 is connected to the corresponding PCS module 20. After the multiple PCS modules 20 are merged on the AC side, they are connected to the step-up transformer.

[0090] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An energy storage system, characterized in that: The energy storage system comprises: at least one battery cluster (10), each battery cluster (10) comprising a plurality of energy storage battery packs, and the battery cluster (10) being arranged inside the battery compartment; at least one PCS module (20), each of the PCS modules (20) being connected to at least one of the battery clusters (10); the at least one PCS module (20) being disposed at one of the top, bottom, and side of the battery compartment; At least one PCS thermal management device (30), each of the PCS thermal management devices (30) is used to adjust the temperature of the corresponding PCS module (20); the at least one PCS thermal management device (30) is arranged at one of the top, bottom, and side of the battery compartment.

2. The energy storage system according to claim 1, characterized in that The PCS thermal management device (30) adopts a heat exchanger; The corresponding two energy storage battery PACKs in the two battery clusters (10) are placed back to back; Each of the PCS modules (20) is connected to two battery clusters (10) arranged back to back; Each of the PCS thermal management devices (30) is arranged on the left side or the right side of the corresponding PCS module (20).

3. The energy storage system according to claim 1, characterized in that The PCS thermal management device (30) adopts a heat exchanger; The corresponding two energy storage battery PACKs in the two battery clusters (10) are placed back to back; All the PCS modules (20) are placed side by side; each of the PCS modules (20) is connected to two battery clusters (10) arranged back to back; Each of the PCS thermal management devices (30) is arranged above or below the corresponding PCS module (20).

4. The energy storage system according to any one of claims 1 to 3, characterized in that: The at least one PCS module (20) and the at least one PCS thermal management device (30) are configured inside the PCS compartment, and the PCS compartment is arranged at one of the top, bottom, and side of the battery compartment; The battery compartment and the PCS compartment are located in the same cabinet, or, The battery compartment is located in the first cabinet, and the PCS compartment is located in the second cabinet. The first cabinet and the second cabinet are two independent cabinets.

5. The energy storage system according to any one of claims 1 to 3, characterized in that: The energy storage system further includes: a battery compartment thermal management device, the battery compartment thermal management device being used to regulate the temperature within the battery compartment; The battery compartment thermal management device is decoupled from the PCS thermal management device (30).

6. The energy storage system according to claim 2 or 3, characterized in that: The heat exchanger is a wind-water heat exchanger or an air-air heat exchanger.

7. The energy storage system according to claim 6, characterized in that: The wind-water heat exchanger adopts a microchannel heat exchanger or a tubular fin heat exchanger; The air-to-air heat exchanger adopts a fin heat exchanger.

8. The energy storage system according to claim 1, characterized in that: The PCS thermal management equipment uses a liquid cooler; The corresponding two energy storage battery PACKs in the two battery clusters (10) are placed back to back; Every two PCS modules (20) are placed back to back, and all the PCS modules (20) placed back to back are stacked vertically.

9. The energy storage system according to claim 8, characterized in that: The at least one PCS module (20) is configured inside the PCS compartment; the PCS compartment is arranged on the side of the battery compartment; Wherein, the battery compartment and the PCS compartment are located in the same cabinet, or, The battery compartment is located in the first cabinet, and the PCS compartment is located in the second cabinet. The first cabinet and the second cabinet are two independent cabinets.

10. The energy storage system according to claim 1, characterized in that: The energy storage system further includes: at least one high voltage box (40); The connection between each of the PCS modules (20) and at least one of the battery clusters (10) includes: each of the PCS modules (20) is correspondingly connected to at least one of the high-voltage boxes (40), and each of the high-voltage boxes (40) is correspondingly connected to at least one of the battery clusters (10).

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