Energy storage system

Abstract

The utility model discloses an energy storage system which comprises a frame body, a top skin, a bottom skin, a battery pack, a connector and a water chilling unit. The frame body has a main frame and a lower frame connected to the main frame. The top skin covers the main frame, and an upper cavity is defined by the top skin. The lower frame is covered with the bottom skin, a lower cavity is defined by the bottom skin, and a ventilation grid part is arranged on the bottom skin. The battery pack is arranged in the upper cavity. The connector is arranged on the lower frame and electrically connected with the energy storage system. And the water cooling unit is at least partially arranged in the lower cavity, and the water cooling unit is communicated with the cooling pipeline in the battery pack. According to the energy storage system, the water cooling unit is arranged in the lower cavity, the spaces on the two sides of the connector are fully utilized, the problem that the water cooling unit is arranged at the top of the main frame and occupies a large space is solved, the whole energy storage system is small in height and size, all modules of the whole energy storage system are reasonably and compactly distributed, and the energy storage efficiency is improved. The energy storage system is good in structural stability.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to an energy storage system. Background Art

[0002] The energy storage system usually includes a frame body, a battery pack, a connector and a water cooling unit. The frame body has a main frame, an upper frame and a lower frame. The upper frame and the lower frame are located at the upper and lower ends of the main frame. The main frame has a battery cavity, and the battery pack is arranged in the battery cavity. The upper frame has an upper cavity, and the water cooling unit is arranged on the upper frame. The lower frame has a lower cavity, and the connector is arranged in the lower cavity, and the connector is electrically connected to the battery pack. The connector is usually located in the middle of the lower cavity, and the connector only occupies the middle space of the lower cavity. The space on both sides of the lower cavity is not fully utilized, resulting in a waste of space. In addition, the cooling unit is arranged on the top of the main frame, which makes the overall height of the energy storage system higher, increases the space occupied by the energy storage system, and makes the entire volume of the energy storage system larger, heavy on the top, light on the bottom, and the center of gravity is biased upward, and the stability is not good.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The utility model provides an energy storage system.

[0005] The utility model adopts the following technical solutions:

[0006] An energy storage system, comprising:

[0007] A frame body, the frame body comprising a main frame and a lower frame connected to the main frame;

[0008] A top skin, the top skin covers the main frame, and the top skin encloses an upper cavity;

[0009] A bottom skin, the bottom skin covers the lower frame, the bottom skin encloses a lower cavity, and a breathable grid portion is provided on the bottom skin;

[0010] A battery pack, wherein the battery pack is disposed in the upper cavity;

[0011] A connector, the connector being disposed on the lower frame and electrically connected to the energy storage system;

[0012] A water cooling unit is at least partially disposed in the lower cavity, and the water cooling unit is connected to a cooling pipe in the battery pack.

[0013] Optionally, the energy storage system includes two battery packs, both of which are disposed in the upper cavity and are connected to each other.

[0014] Optionally, the energy storage system includes a connecting plate, which is respectively connected to the two battery packs.

[0015] Optionally, the connecting plate is respectively attached to the two battery packs, and first connecting holes are provided on four corners of the connecting plate, and one end of the fastener passes through the first connecting hole and is connected to the corresponding battery pack.

[0016] Optionally, a plurality of strip grooves are provided on the connecting plate, and each of the strip grooves is parallel to the gap between the two battery packs.

[0017] Optionally, the water cooling unit includes a condenser and a compressor;

[0018] The condenser and the compressor are both arranged in the lower cavity.

[0019] Optionally, the water cooling unit includes two condensers;

[0020] The two condensers are respectively arranged on both sides of the connector.

[0021] Optionally, the water cooling unit includes a fan, the fan is arranged in the lower cavity, and the rotation axis of the fan faces the condenser;

[0022] The bottom skin is provided with air-permeable grid parts on both sides of the rotation axis of the fan.

[0023] Optionally, the energy storage system includes a high-voltage box, which is disposed in the lower cavity, and the connector is disposed on a side of the high-voltage box away from the main frame.

[0024] Optionally, the bottom skin includes a bottom middle skin, a bottom side skin and an end side skin, and the bottom middle skin, the bottom side skin and the end side skin can be detachably mounted on the lower frame;

[0025] The bottom middle skin is located on both sides of the high-pressure box, the bottom side skin is located on both sides of the condenser, the air-permeable grid portion is arranged on the bottom side skin, and the end side skin is perpendicular to the bottom side skin.

[0026] By adopting the above technical solution, the utility model has the following beneficial effects:

[0027] The energy storage system of the present application arranges the water cooling unit in the lower cavity, making full use of the space on both sides of the connector, avoiding the problem of arranging the water cooling unit on the top of the main frame to occupy a large space, making the height and volume of the entire energy storage system smaller, the position distribution of each module of the entire energy storage system is reasonable and compact, and the structural stability of the energy storage system is good.

[0028] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] Figure 1 A schematic diagram of the appearance structure of the energy storage system provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the internal structure of the energy storage system provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the structure of the energy storage system provided in an embodiment of the present application without the top skin.

[0033] In the figure, the frame body 1, the main frame 11, the lower frame 12, the battery pack 2, the connector 3, the fan 4, the bottom skin 5, the middle skin 51, the bottom side skin 52, the breathable grid part 521, the end side skin 53, the high-voltage box 6, the connecting plate 7, the first connecting hole 71, the strip groove 72, and the top skin 8.

[0034] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See also Figures 1 to 3 As shown, an embodiment of the present application provides an energy storage system, including: a frame body 1, a top skin 8, a bottom skin 5, a battery pack 2, a connector 3 and a water cooling unit. The frame body 1 has a main frame 11 and a lower frame 12 connected to the main frame 11. The top skin 8 covers the main frame 11, and the top skin 8 encloses an upper cavity. The bottom skin 5 covers the lower frame 12, and the bottom skin 5 encloses a lower cavity. A breathable grid portion 521 is provided on the bottom skin 5. The battery pack 2 is provided in the upper cavity. The connector 3 is provided on the lower frame 12, and the connector 3 is electrically connected to the energy storage system. The base of the energy storage system of the electric vehicle having the energy storage system of the present application also has an electrical connector. When the energy storage system is installed on the base, the two electrical connectors are electrically connected, and the energy storage system can provide electric energy for the electric vehicle. The water cooling unit is at least partially provided in the lower cavity, and the water cooling unit is connected to the cooling pipe in the battery pack 2. The energy storage system of the present application sets the water cooling unit in the lower cavity, making full use of the space on both sides of the connector 3, avoiding the problem of setting the water cooling unit on the top of the main frame 11 to occupy a large space, making the height and volume of the entire energy storage system smaller, the position distribution of each module of the entire energy storage system is reasonable and compact, and the structural stability of the energy storage system is good.

[0039] like Figure 3 As shown, the energy storage system includes two battery packs 2, both of which are arranged in the upper cavity, and the two battery packs 2 are connected. The two battery packs 2 are connected to form an integrated structure with good stability, and no shaking or bumping will occur during movement, while also reducing or avoiding resonance.

[0040] like Figure 3 As shown, the energy storage system includes a connecting plate 7, and the connecting plate 7 is respectively connected to the two battery packs 2. The two battery packs 2 are connected into a whole, and the assembly structure has good stability.

[0041] In one possible embodiment, Figure 3As shown, the connecting plate 7 is respectively attached to the two battery packs 2, and the four corners of the connecting plate 7 are provided with first connecting holes 71, and one end of the fastener passes through the first connecting hole 71 and is connected to the corresponding battery pack 2. The shell of the battery pack 2 has a threaded hole, and the fastener can be a screw, the rod of the screw passes through the first connecting hole 71 and is connected to the threaded hole, and the cap of the screw is limited to the side of the connecting plate 7 away from the battery pack 2. The connecting plate 7 is a rectangular plate body, and in the direction along the length of the connecting plate 7, the two first connecting holes 71 located on the same side are connected to the same battery pack 2, and in the direction along the width of the connecting plate 7, the two first connecting holes 71 located on the same side are respectively connected to the two battery packs 2. In this way, the two battery packs 2 are connected and fixed in both the length and width directions, so that the connection structure has good stability.

[0042] like Figure 3 As shown, the connecting plate 7 is provided with a plurality of strip grooves 72, each of which is parallel to the gap between the two battery packs 2. The strip grooves 72 extend along the height direction of the main frame 11, and the strip grooves 72 are hollow grooves, so that the connecting plate 7 is light in weight, and the connecting plate 7 has a certain deformation space, so that the connecting plate 7 has a certain deformation capacity, and is not easy to be deformed and damaged when subjected to force.

[0043] The water cooling unit includes a condenser and a compressor, and the condenser and the compressor are both arranged in the lower cavity. The water cooling unit can adopt an air conditioning system, and the water cooling unit is connected to the cooling pipe in the battery pack 2 through a pipe to cool the battery pack 2.

[0044] The water-cooling unit may include two condensers. The two condensers are disposed on both sides of the connector 3. If only one condenser is provided, it is necessary to provide a larger condenser. The space volume of the lower cavity located on both sides of the connector 3 is limited and cannot accommodate a large condenser. By providing two condensers, respectively disposed on both sides of the connector 3, the space on both sides of the connector 3 can be fully utilized. The two condensers are connected in series or in parallel to ensure the normal operation of the water-cooling unit. It should be noted that the water-cooling unit can adopt an air-conditioning system, and the structure of the air-conditioning system providing two condensers is a mature prior art, and the specific structure and principle thereof will not be described in detail in this application.

[0045] In one possible embodiment, Figure 2As shown, the water cooling unit includes a fan 4, and the fan 4 is arranged in the lower cavity, and the rotation axis of the fan 4 faces the condenser. The condenser contains a cooling medium. After the fan 4 is started, the outside air is fully in contact with the condenser, which accelerates the heat exchange and is beneficial to the effective temperature control of the battery pack 2. Breathable grid portions 521 are respectively provided on both sides of the rotation axis of the fan 4 on the bottom skin 5. The breathable grid portion 521 is beneficial to the good air flow at both ends of the rotation axis of the fan 4, and can facilitate heat exchange with the outside air to effectively control the temperature of the battery pack 2.

[0046] like Figure 2 As shown, the energy storage system includes a high-voltage box 6, which is arranged in the lower cavity, and the connector 3 is arranged on the side of the high-voltage box 6 away from the main frame 11. In the prior art, the high-voltage box 6 is usually arranged on the top of the main frame 11, and the connector 3 is arranged on the lower side of the main frame 11. The connector 3 is connected to the high-voltage box 6 through a cable, and the structure is complicated. The energy storage system of the present application integrates the connector 3 on the high-voltage box 6, and there is no need to use a long external cable to connect the two, with high integration, and full use of the space of the lower cavity.

[0047] In one possible embodiment, Figure 1 and Figure 3 As shown, the bottom skin 5 includes a bottom middle skin 51, a bottom side skin 52 and an end side skin 53. The bottom middle skin 51, the bottom side skin 52 and the end side skin 53 can be detachably mounted on the lower frame 12. When assembling the energy storage system of the present application, the water cooling unit is first mounted on the lower frame 12, and then the bottom skin 5 is installed. When the water cooling unit fails and needs to be repaired, the bottom skin 5 can be removed. The detachable structure facilitates the repair and installation of the water cooling unit. The bottom middle skin 51 is located on both sides of the high-pressure box 6, and the bottom side skin 52 is located on both sides of the condenser. The air permeable grid portion 521 is provided on the bottom side skin 52, and the end side skin 53 is perpendicular to the bottom side skin 52. The bottom middle skin 51 and the bottom side skin 52 on the same side of the lower frame 12 are located in the same plane.

[0048] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. An energy storage system, characterized in that: include: A frame body, the frame body comprising a main frame and a lower frame connected to the main frame; A top skin, the top skin covers the main frame, and the top skin encloses an upper cavity; A bottom skin, the bottom skin covers the lower frame, the bottom skin encloses a lower cavity, and a breathable grid portion is provided on the bottom skin; A battery pack, wherein the battery pack is disposed in the upper cavity; A connector, the connector being disposed on the lower frame and electrically connected to the energy storage system; A water cooling unit is at least partially disposed in the lower cavity, and the water cooling unit is connected to a cooling pipe in the battery pack.

2. The energy storage system according to claim 1, characterized in that: It comprises two battery packs, both of which are arranged in the upper cavity and are connected.

3. The energy storage system according to claim 2, characterized in that: It includes a connecting plate, and the connecting plate is respectively connected to the two battery packs.

4. The energy storage system according to claim 3, characterized in that: The connecting plates are respectively attached to the two battery packs, and first connecting holes are provided on the four corners of the connecting plates. One end of the fastener passes through the first connecting hole and is connected to the corresponding battery pack.

5. The energy storage system according to claim 4, characterized in that: A plurality of strip grooves are arranged on the connecting plate, and each of the strip grooves is parallel to the gap between the two battery packs.

6. The energy storage system according to claim 1, characterized in that: The water cooling unit includes a condenser and a compressor; The condenser and the compressor are both arranged in the lower cavity.

7. The energy storage system according to claim 6, characterized in that: The water cooling unit includes two condensers; The two condensers are respectively arranged on both sides of the connector.

8. The energy storage system according to claim 7, characterized in that: The water cooling unit comprises a fan, which is arranged in the lower cavity, and the rotation axis of the fan faces the condenser; The bottom skin is provided with air-permeable grid parts on both sides of the rotation axis of the fan.

9. The energy storage system according to claim 8, characterized in that: It comprises a high-voltage box, which is arranged in the lower cavity, and the connector is arranged on a side of the high-voltage box away from the main frame.

10. The energy storage system according to claim 9, characterized in that: The bottom skin comprises a bottom middle skin, a bottom side skin and an end side skin, and the bottom middle skin, the bottom side skin and the end side skin can be detachably mounted on the lower frame; The bottom middle skin is located on both sides of the high-pressure box, the bottom side skin is located on both sides of the condenser, the air-permeable grid portion is arranged on the bottom side skin, and the end side skin is perpendicular to the bottom side skin.

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