Battery energy storage structure

Abstract

The utility model relates to a battery energy storage structure which comprises a liquid cooling plate and is characterized in that connecting pieces are arranged on the peripheries of the two sides of the liquid cooling plate respectively, each connecting piece extends in the length direction of the liquid cooling plate, each connecting piece is of a double-layer structure and forms a cavity, a partition piece is further arranged in the cavity, and the partition piece is connected with the liquid cooling plate. The liquid cooling plate is provided with a cavity, the liquid cooling plate is provided with a separator, and the edge of the periphery of the separator abuts against the inner wall of the cavity so as to divide the cavity into at least two connecting spaces. Compared with the prior art, the liquid cooling plate has the advantages that the liquid cooling plate is supported by a connecting piece and connected by means of a rivet nut or a rivet; the traditional connection mode of welding the frame and the liquid cooling plate is cancelled, so that the production process is greatly simplified, and the one-time yield is improved; and meanwhile, different connecting spaces are formed by utilizing the double-layer structure of the connecting piece and the partition piece, so that the reinforcing plate or the bottom protection plate and the liquid cooling plate do not interfere with each other when being connected.

Description

Technical Field

[0001] This utility model relates to the field of energy storage batteries, specifically to a battery energy storage box structure. Background Technology

[0002] With the rapid development of new energy technologies, battery energy storage systems have been widely used in fields such as grid energy storage, new energy energy storage, mobile energy storage, and industrial energy storage. Traditional battery storage enclosures typically employ a frame-to-liquid-cooling-plate welding connection. For example, Chinese patent publication CN217788659U, "Battery Pack Lower Enclosure, Battery Pack, and Vehicle," discloses a battery pack lower enclosure comprising a frame forming a ring structure and a liquid-cooling plate sealing the lower open end of the frame. This liquid-cooling plate is fixed to the frame. A similar structure can be found in patent publication CN216413153U, "An Integrated Liquid-Cooled Aluminum Alloy Energy Storage Battery Box," which includes an enclosure frame and a liquid-cooling bottom plate. The enclosure frame is composed of four side plates welded together and connected to the liquid-cooling bottom plate via laser welding or friction stir welding. The connection between the frame and the liquid-cooling plate often employs FDS (rotary tapping and riveting) or welding processes. These processes suffer from low first-pass yield, difficulty in repairing seal failures, and difficulty in increasing production capacity, failing to meet the demands of mass production. Therefore, further improvements are needed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a battery energy storage structure that can improve the yield of primary products, in view of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: The battery energy storage structure includes a liquid cooling plate, characterized in that: connectors are respectively provided on both sides of the liquid cooling plate, each connector extends along the length direction of the liquid cooling plate, each connector has a double-layer structure and forms a cavity, and a partition is also provided in the cavity, the periphery of the partition abuts against the inner wall of the cavity to divide the cavity into at least two connecting spaces, and fasteners are respectively provided in each connecting space to connect the reinforcing plate or the bottom protective plate to the required position of the liquid cooling body.

[0005] To prevent interference between the reinforcing plate and the bottom protective plate during installation, the cavity is divided into relatively independent connection spaces using partitions. The following partitioning method is preferred:

[0006] The separator is a vertical partition extending perpendicular to the length of the liquid cooling plate, and the cavity is divided into at least two connecting spaces distributed along the width of the liquid cooling plate. Since the bottom protective plate needs to be installed above the liquid cooling plate and the reinforcing plate needs to be installed below the liquid cooling plate, using different connecting spaces ensures that the reinforcing plate and the bottom protective plate do not interfere with each other during installation.

[0007] Furthermore, the double-layer structure of each connector consists of an upper plate and a lower plate, and two vertical partitions are provided. Correspondingly, the connection space is divided into a first connection space on the outer side and a second connection space on the inner side. The bottom protective plate is fastened to the liquid cooling plate by means of fasteners on the upper plate corresponding to the first connection space, and the reinforcing plate is fastened to the liquid cooling plate by means of fasteners on the lower plate corresponding to the second connection space. As mentioned above, different connection spaces are required when installing the bottom protective plate and the reinforcing plate. Therefore, the double-layer structure of the connector, namely the upper plate and the lower plate, allows the reinforcing plate and the bottom protective plate to be installed separately in terms of space, that is, the upper and lower layers. At the same time, the first and second connection spaces, which are offset in width relative to the liquid cooling plate, also allow the reinforcing plate and the bottom protective plate to be installed separately on the inner and outer sides.

[0008] To facilitate a better connection between the reinforcing plate and the lower plate of the connector, preferably, the lower plate has a first step that gradually ascends from the first connecting space to the second connecting space. Correspondingly, the end of the reinforcing plate also has a second step that matches the first step. The purpose of the first and second steps is twofold: First, since the first step gradually ascends from the first connecting space to the second connecting space, the height difference between the step and the outer end of the lower plate can compensate for the problem of unevenness between the reinforcing plate and the lower plate of the connector caused by the thickness of the reinforcing plate itself; Second, the fit between the steps in the first and second steps can prevent misalignment during the connection and also enhance the tightness of the connection at the ends.

[0009] To improve the overall strength of the battery storage box, preferably, the reinforcing plate includes at least two first reinforcing plates arranged along the length direction of the liquid cooling plate and at least two second reinforcing plates arranged along the width direction of the liquid cooling plate. The first and second reinforcing plates can be structurally identical components, or they can have different structures adapted to different installation positions. By reinforcing the liquid cooling plate in both the length and width directions, the overall strength of the battery storage box can be better improved.

[0010] Furthermore, the upper surface of the bottom protective plate is provided with mounting components for mounting the battery module. Since this battery energy storage structure eliminates the traditional box frame, a corresponding structure is required for mounting the battery module. Therefore, the mounting components serve the purpose of mounting the battery module onto the bottom protective plate.

[0011] Furthermore, two mounting components are provided and spaced apart along the length of the liquid cooling plate, with each mounting component forming a strip-like structure extending along the width of the liquid cooling plate. This strip-like structure can better adapt to flat battery modules.

[0012] Furthermore, the liquid cooling plate is provided with cooling channels for guiding the coolant, and the bottom protective plate is provided with interfaces for external coolant to flow into and / or out of the cooling channels. The interfaces are respectively connected to the inlet and / or outlet of the cooling channels to provide a cold source to the liquid cooling plate and accelerate heat exchange between battery modules, thereby improving the cooling effect.

[0013] To replace the traditional welding connection method, preferably, the fastener corresponding to the first connection space and securing the bottom protective plate to the liquid cooling plate is a rivet nut, while the fastener corresponding to the second connection space and securing the reinforcing plate to the liquid cooling plate is a rivet. Thus, by selecting rivet nuts or rivets as fasteners, the overall connection of the battery energy storage structure can be achieved using riveting and rivet joining, replacing the traditional welding connection method and avoiding the technical defects of low first-pass yield and difficulty in repairing seal failures caused by welding.

[0014] Compared with the prior art, the advantages of this utility model are as follows: The structure of this design adopts a connecting piece to support the liquid cooling plate and uses a connection method of rivet nuts or rivets, which eliminates the traditional connection method of welding the frame and the liquid cooling plate, greatly simplifies the production process and improves the first-pass yield; at the same time, the double-layer structure of the connecting piece and the separator form different connection spaces, so that there is no interference between the reinforcing plate or bottom guard plate and the liquid cooling plate when they are connected. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the battery energy storage structure in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the battery energy storage structure from another angle in an embodiment of this utility model;

[0017] Figure 3 This is an exploded view of the battery energy storage structure in an embodiment of this utility model;

[0018] Figure 4This is a schematic diagram of the connector structure in an embodiment of this utility model;

[0019] Figure 5 This is a partially enlarged structural diagram of the connector and reinforcing plate in an embodiment of this utility model;

[0020] Figure 6 This is an enlarged structural diagram of the second step of the reinforcing plate in an embodiment of this utility model;

[0021] Figure 7 This is a schematic diagram of the battery energy storage structure with a battery module installed in an embodiment of this utility model. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1-7 The diagram shows the preferred embodiment of this utility model. The battery energy storage structure in this embodiment includes a liquid cooling plate 1, and connectors 2 are respectively provided on both sides of the liquid cooling plate 1. Each connector 2 extends along the length of the liquid cooling plate 1, and each connector 2 has a double-layer structure forming a cavity 21. A partition 3 is also provided within the cavity 21, wherein the periphery of the partition 3 abuts against the inner wall of the cavity 21 to divide the cavity 21 into at least two connection spaces. Each connection space is provided with fasteners for connecting the reinforcing plate 4 or the bottom protective plate 5 to the required positions on the liquid cooling plate 1. This battery energy storage structure uses connectors 2 to support the liquid cooling plate 1 and uses rivet nuts 6 or rivets 7 for connection, eliminating the traditional method of welding the frame to the liquid cooling plate 1, greatly simplifying the production process and improving the first-pass yield. Simultaneously, by utilizing the double-layer structure of the connectors 2 and the partitions 3 to form different connection spaces, interference does not occur when the reinforcing plate 4 or the bottom protective plate 5 is connected to the liquid cooling plate 1.

[0024] Specifically, in this embodiment, the partition 3 is a vertical partition extending perpendicularly to the length of the liquid cooling plate 1, and the cavity 21 is divided into at least two connecting spaces distributed along the width of the liquid cooling plate 1. Since the bottom protective plate 5 needs to be placed above the liquid cooling plate 1 and the reinforcing plate 4 needs to be placed below the liquid cooling plate 1 during installation, two independent connecting spaces are necessary. Referring to the figure, the double-layer structure of each connecting piece 2 consists of an upper plate 24 and a lower plate 25, and two vertical partitions are provided. Correspondingly, the connecting spaces are divided into a first connecting space 22 located on the outer side and a second connecting space 23 located on the inner side. The bottom protective plate 5 is fastened to the liquid cooling plate 1 by means of fasteners on the upper plate 24 corresponding to the first connecting space 22. The fasteners are preferably rivet nuts 6. At the same time, the reinforcing plate 4 is fastened to the liquid cooling plate 1 by means of fasteners on the lower plate 25 corresponding to the second connecting space 23. The fasteners are preferably rivets 7, replacing the traditional welding connection method. As mentioned earlier, different connection spaces are required when installing the bottom protective plate 5 and the reinforcing plate 4. Therefore, the double-layer structure of the connector 2, namely the upper plate 24 and the lower plate 25, allows the reinforcing plate 4 and the bottom protective plate 5 to be installed separately in terms of space, i.e., the upper and lower layers. At the same time, the first connection space 22 and the second connection space 23, which are offset in width relative to the liquid cooling plate 1, also allow the reinforcing plate 4 and the bottom protective plate 5 to be installed separately on the inside and outside. Of course, openings for rivets 7 or rivet nuts 6 need to be made in both the upper plate 24 and the lower plate 25 of the connector 2 corresponding to the first connection space 22 and the second connection space 23.

[0025] Of course, in order to improve the overall strength of the battery energy storage box, the reinforcing plate 4 in this embodiment includes at least two first reinforcing plates 42 arranged along the length direction of the liquid cooling plate 1 and at least two second reinforcing plates 43 arranged along the width direction of the liquid cooling plate 1. The first reinforcing plates 42 and the second reinforcing plates 43 can be structurally identical components, or they can have different structures adapted to different installation positions. By reinforcing the liquid cooling plate 1 in the length and width directions, the overall strength of the battery energy storage box can be better improved. In this embodiment, five first reinforcing plates 42 and three second reinforcing plates 43 are provided. In order to better connect the first reinforcing plates 42 located at both ends of the length direction with the lower plate 25 of the connector 2, the lower plate 25 has a special design, that is, the lower plate 25 has a first step 251 that gradually rises from the direction of the first connecting space 22 to the second connecting space 23. Correspondingly, the ends of the first reinforcing plates 42 located at both ends of the length direction are also provided with second steps 41 that match the first step 251. Without the design of the first step 251 and the second step 41, there is a possibility that the thickness of the reinforcing plate 4 itself may cause it to be uneven with the lower plate 25 of the connector 2. However, since the first step 251 gradually rises from the first connecting space 22 to the second connecting space 23, the height difference between the step and the outer end of the lower plate 25 corresponding to the first connecting space 22 can be used to compensate for the unevenness. In addition, the cooperation between the steps in the first step 251 and the second step 41 can strengthen the connection between the two to prevent misalignment and also strengthen the tightness of the connection at the ends.

[0026] As shown in the figure, the liquid cooling plate 1 of this embodiment is provided with a cooling channel 11 for guiding the coolant, and the bottom protective plate 5 is provided with an interface 50 for external coolant to flow into and out of the cooling channel 11. There are two interfaces 50, which are respectively located at the inlet and outlet of the cooling channel 11, and can provide a cold source to the liquid cooling plate 1 to accelerate the heat exchange between the battery modules B and improve the cooling effect. Finally, in order to install the battery modules B, a mounting component 51 for installing the battery modules B is provided on the upper surface of the bottom protective plate 5. Since this battery energy storage structure eliminates the traditional box frame, a corresponding structure is required for the installation of the battery modules B. Therefore, the mounting component 51 serves to install the battery modules B on the bottom protective plate 5. There are two mounting components 51, which are spaced apart along the length of the liquid cooling plate 1. Each mounting component 51 is a strip structure extending along the width of the liquid cooling plate 1. This strip structure can better adapt to the flat battery modules B.

[0027] In summary, the battery energy storage structure of this embodiment has connectors 2 with a double-layer structure on both sides of the liquid cooling plate 1. These connectors 2 serve two purposes: firstly, they replace the traditional frame structure; secondly, they connect to the reinforcing plate 4 and the bottom protective plate 5 respectively through the two connection spaces they form. Since the bottom protective plate 5 needs to completely cover the connectors 2 on both sides, the specific installation process is as follows: a) First, connect each of the first reinforcing plates 42 and the second reinforcing plates 43 at both ends to the second connection spaces 23 of each connector 2 using rivets 7. a) The second reinforcing plate 43 located in the middle is connected to the first reinforcing plate 42 located at both ends of the length direction by riveting with rivets 7; b) The bottom guard plate 5 is connected to the upper plate 24 corresponding to the first connection space 22 of each connector 2 by using rivet nuts 6; c) Finally, the battery module B is installed on the installation space 52 defined by the two mounting parts 51, and the strip structure, such as the mounting strip, has at least two mounting holes 53 for installation, and the strip structure extending along the width direction of the liquid cooling plate 1 can better adapt to the installation of the flat battery module B.

Claims

1. A battery energy storage structure, comprising a liquid cooling plate (1), characterized in that: Connectors (2) are respectively provided on both sides of the liquid cooling plate (1). Each connector (2) extends along the length of the liquid cooling plate (1). Each connector (2) has a double-layer structure and forms a cavity (21). A partition (3) is also provided in the cavity (21). The edge of the partition (3) abuts against the inner wall of the cavity (21) to divide the cavity (21) into at least two connecting spaces. Each connecting space is provided with fasteners for connecting the reinforcing plate (4) or the bottom protective plate (5) to the required position on the liquid cooling plate (1).

2. The battery energy storage structure according to claim 1, characterized in that: The separator (3) is a vertical partition extending vertically along the length of the liquid cooling plate (1), and the cavity (21) is divided into at least two connecting spaces distributed along the width of the liquid cooling plate (1).

3. The battery energy storage structure according to claim 2, characterized in that: Each of the connectors (2) has a double-layer structure consisting of an upper plate (24) and a lower plate (25), and two vertical partitions are provided. Correspondingly, the connection space is divided into a first connection space (22) located on the outside and a second connection space (23) located on the inside. The bottom guard plate (5) is fastened to the liquid cooling plate (1) by means of fasteners on the upper plate (24) corresponding to the first connection space (22). At the same time, the reinforcing plate (4) is fastened to the liquid cooling plate (1) by means of fasteners on the lower plate (25) corresponding to the second connection space (23).

4. The battery energy storage structure according to claim 3, characterized in that: The lower plate (25) has a first step (251) that gradually ascends from the first connecting space (22) to the second connecting space (23). Correspondingly, the end of the reinforcing plate (4) is also provided with a second step (41) that matches the first step (251).

5. The battery energy storage structure according to claim 4, characterized in that: The reinforcing plate (4) includes at least two first reinforcing plates (42) arranged along the length direction of the liquid cooling plate (1) and at least two second reinforcing plates (43) arranged along the width direction of the liquid cooling plate (1).

6. The battery energy storage structure according to any one of claims 1 to 5, characterized in that: The upper surface of the bottom cover plate (5) is provided with a mounting part (51) for mounting the battery module (B).

7. The battery energy storage structure according to claim 6, characterized in that: Two mounting components (51) are provided and are spaced apart along the length of the liquid cooling plate (1). Each mounting component (51) is a strip-shaped structure extending along the width of the liquid cooling plate (1).

8. The battery energy storage structure according to claim 7, characterized in that: The liquid cooling plate (1) is provided with a cooling channel (11) for guiding the coolant, and the bottom protective plate (5) is provided with an interface (50) for external coolant to flow into and / or out of the cooling channel (11).

9. The battery energy storage structure according to any one of claims 3 to 5, characterized in that: The fastener corresponding to the first connecting space (22) and fastening the bottom guard plate (5) to the liquid cooling plate (1) is a rivet nut (6), while the fastener corresponding to the second connecting space (23) and fastening the reinforcing plate (4) to the liquid cooling plate (1) is a rivet (7).

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