Battery cluster

Abstract

The utility model provides a battery cluster. The battery cluster comprises a battery rack and a plurality of battery modules which are stacked on the battery rack up and down, each battery module comprises a battery cell unit, a liquid cooling plate arranged at the bottom of the battery cell unit, and a heat-conducting glue layer arranged at the top of the battery cell unit; and the liquid cooling plate of the battery module on the upper layer is propped against the heat-conducting glue layer of the adjacent battery module on the lower layer. According to the battery cluster disclosed by the utility model, the adjacent upper and lower layers of battery modules share one liquid cooling plate, so that the volume energy density of the battery cluster is favorably improved, the temperature difference between the upper and lower layers of battery cells can be reduced, the cycle life of the battery cells is prolonged, and the cost performance of a product is favorably improved as the upper and lower layers of battery modules share the liquid cooling plate.

Description

Technical Field

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

[0002] As an indispensable part of the new energy industry, the energy storage industry is a key subsystem in the entire new energy system. Generally speaking, large-scale energy storage systems combine single batteries into modules in series and parallel, and then connect the modules in series and parallel on the battery rack. Multiple groups of battery racks form a cluster, and multiple clusters are combined with certain electrical equipment to form a complete energy storage container system.

[0003] However, due to the limitations of the existing battery cluster structure, the space utilization and energy density of the battery cluster are low. At the same time, since the battery module on the battery rack is usually a single-layer cold plate structure, the temperature difference between the upper and lower parts of the battery cell is large, which affects the life cycle of the battery cell. If a double-layer cold plate structure is adopted, the cost of the battery cluster will often be high, which is not conducive to improving the cost performance and competitiveness of the product. In addition, it is also difficult to disassemble and assemble the battery module on the battery rack, which is not conducive to the maintenance and replacement of the battery module. Utility Model Content

[0004] In view of this, the present invention aims to provide a battery cluster to improve the space utilization and cooling effect of the battery cells.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A battery cluster comprises a battery rack and a plurality of battery modules stacked up and down on the battery rack;

[0007] The battery module includes a battery cell unit, a liquid cooling plate arranged at the bottom of the battery cell unit, and a thermal conductive adhesive layer arranged at the top of the battery cell unit;

[0008] The liquid cooling plate of the battery module located at the upper layer abuts against the thermally conductive adhesive layer of the adjacent battery module located at the lower layer.

[0009] Furthermore, the battery cell unit includes two first end plates arranged at intervals, two second end plates connected between the two first end plates, and a plurality of battery cells arranged in sequence between the two first end plates.

[0010] Furthermore, the two second end plates and the thermally conductive adhesive layer form a receiving groove for receiving the liquid cooling plate of the battery module on the upper layer.

[0011] Furthermore, an end of the liquid cooling plate close to one of the first end plates is provided with an extension portion extending out from the battery rack, and a liquid inlet and a liquid outlet are provided on the extension portion.

[0012] Furthermore, the battery rack includes a rack body and a support plate disposed on the rack body;

[0013] The support plate supports both ends of the battery module in a width direction.

[0014] Furthermore, the frame body has a receiving space with an opening on one side, and the support plate is arranged in the receiving space;

[0015] Roller assemblies are provided at both ends of the battery module in the width direction, and the battery module can slide into or out of the accommodating space through the roller assemblies.

[0016] Furthermore, the roller assembly includes a first roller disposed near both ends of the battery module in the length direction, and a second roller disposed near the middle position of the battery module.

[0017] Furthermore, the support plate is provided with two first grooves which are recessed downward and spaced apart along the length direction of the support plate, and a second groove located between the two first grooves;

[0018] After the battery module is installed in a designated position on the battery rack, the two first rollers can fall into the first grooves respectively, and the second roller can fall into the second groove.

[0019] Furthermore, the width of the first roller is greater than the width of the second groove.

[0020] Furthermore, the support plate is provided with a first guiding surface for guiding the first roller to enter the first groove, and a second guiding surface for guiding the second roller to enter the second groove.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] The battery cluster described in the utility model makes the liquid cooling plate of the upper battery module abut against the thermal conductive adhesive layer of the battery module located at the lower layer, so that the upper and lower adjacent battery modules share a liquid cooling plate, and eliminates the distance between the two layers of battery modules, which is beneficial to improving the volume energy density of the battery cluster, and is beneficial to cooling the top and bottom of the battery module, reducing the temperature difference between the upper and lower parts of the battery cell, and improving the cycle life of the battery cell. The upper and lower battery modules share the liquid cooling plate, which is beneficial to improving the cost performance of the product.

[0023] In addition, by providing a roller assembly, the battery module can slide into or out of the accommodation space through the roller, which is convenient for operation and easy maintenance and replacement of the battery module. And by making the width of the first roller larger than the width of the second groove, it can prevent the first roller from falling into the second groove during the movement of the battery module, thereby affecting the disassembly and assembly operation of the battery module.

[0024] In addition, by providing the first guide surface and the second guide surface, it is possible to prevent the battery module from suddenly falling after being moved to a designated position, thereby preventing the battery module from being impacted and causing adverse effects on the service life of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the battery cluster according to an embodiment of the utility model;

[0027] Figure 2 A front view of a battery cluster according to an embodiment of the utility model;

[0028] Figure 3 for Figure 2 A magnified view of part A;

[0029] Figure 4 This is a schematic diagram of the structure of the battery module according to an embodiment of the utility model;

[0030] Figure 5 A bottom view of the battery module according to an embodiment of the present utility model;

[0031] Figure 6 A top view of a battery rack according to an embodiment of the utility model;

[0032] Figure 7 It is a schematic diagram of the first roller and the second roller according to the embodiment of the utility model falling into the first groove and the second groove respectively;

[0033] Figure 8 for Figure 7 A magnified view of part B;

[0034] Fig. 9 for Figure 7 Magnified view of part C.

[0035] Description of reference numerals:

[0036] 1. Battery rack; 101. Support plate;

[0037] 2. Battery module; 201. Cell unit; 2011. Cell; 2012. First end plate; 2013. Second end plate; 202. Liquid cooling plate; 2021. Extended portion; 2022. Liquid inlet; 2023. Liquid outlet; 203. Thermal conductive adhesive layer;

[0038] 3. First roller; 4. Second roller; 5. First groove; 6. Second groove; 7. First guide surface; 8. Second guide surface. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0043] This embodiment relates to a battery cluster, the overall structure of which is as follows: Figure 1 , Figure 2 and Figure 3 As shown in the figure, it includes a battery rack 1, and a plurality of battery modules 2 stacked up and down on the battery rack 1. The battery module 2 includes a battery cell unit 201, a liquid cooling plate 202 arranged at the bottom of the battery cell unit 201, and a thermal conductive adhesive layer 203 arranged at the top of the battery cell unit 201. The liquid cooling plate 202 of the battery module 2 located at the upper layer abuts against the thermal conductive adhesive layer 203 of the adjacent battery module 2 located at the lower layer.

[0044] It can be understood that the battery cluster of this embodiment makes the liquid cooling plate 202 of the upper battery module 2 abut against the thermal conductive adhesive layer 203 of the battery module 2 located at the lower layer, so that the upper and lower adjacent battery modules 2 share a liquid cooling plate 202, and the distance between the two layers of battery modules 2 is eliminated, which is beneficial to improving the volume energy density of the battery cluster, and is beneficial to cooling the top and bottom of the battery module 2, reducing the upper and lower temperature difference of the battery cell 2011, and improving the cycle life of the battery cell 2011. In addition, the upper and lower layers of battery modules 2 share the liquid cooling plate 202, which is beneficial to improving the cost performance of the product.

[0045] Based on the above overall introduction, as a preferred implementation method, Figure 4 As shown in the figure, in this embodiment, the battery cell unit 201 includes two first end plates 2012 arranged at intervals, two second end plates 2013 connected between the two first end plates 2012, and a plurality of battery cells 2011 sequentially arranged between the two first end plates 2012. Such a configuration has a simple structure and is convenient for assembling the battery module.

[0046] Preferably, in this embodiment, the two second end plates 2013 and the thermally conductive adhesive layer 203 are arranged to form a receiving groove for receiving the liquid cooling plate 202 of the upper battery module 2. Figure 3 As shown in , after the battery module 2 is assembled on the battery rack 1, the bottom of the liquid cooling plate 202 of the upper battery module 2 can abut against the thermal conductive adhesive layer 203 of the lower battery module 2, thereby realizing heat exchange with the lower battery cell 2011, and the side of the liquid cooling plate 202 of the upper battery module 2 can abut against the second end plate 2013 of the lower battery module 2, which is convenient for positioning the installation of the battery module 2.

[0047] In addition, as a preferred embodiment, the end of the liquid cooling plate 202 close to the first end plate 2012 is provided with an extension portion 2021 extending out of the battery rack 1, and the extension portion 2021 is provided with a liquid inlet 2022 and a liquid outlet 2023. Figure 1 and Figure 4 As shown in , in this embodiment, a protruding portion 2021 is provided at one end of the first end plate 2012 of the liquid cooling plate 202 close to the opening position described below, and a liquid inlet 2022 and a liquid outlet 2023 are provided on the protruding portion 2021, so that the liquid inlet 2022 and the liquid outlet 2023 are conveniently connected to the external pipeline. Of course, in other embodiments, the protruding portion 2021 can also be provided at one end of the first end plate 2012 close to the other side of the liquid cooling plate 202. In addition, the remaining structures of the liquid cooling plate 202 can be provided with reference to the structure of the existing liquid cooling plate 202, and will not be described in detail here.

[0048] As a preferred example, Figure 2As shown in FIG. 1 , in this embodiment, the battery rack 1 includes a rack body and a support plate 101 disposed on the rack body. The support plate 101 is supported at both ends of the width direction of the battery module 2. By making the battery rack 1 include the rack body and the support plate 101, and making the support plate 101 supported at both ends of the width direction of the battery module 2, the structure is simple and the abutment between the liquid cooling plate 202 of the upper battery module 2 and the thermal conductive adhesive layer 203 of the lower battery module 2 is not affected.

[0049] As a preferred embodiment, as shown in the figure, in this embodiment, the frame body has a storage space with an opening on one side, and the support plate 101 is arranged in the storage space. Roller assemblies are provided at both ends of the width direction of the battery module 2, and the battery module 2 can slide into or out of the storage space through the roller assembly. It can be understood that by providing a roller assembly and enabling the battery module 2 to slide into or out of the storage space through the roller, the operation is convenient, and the maintenance and replacement of the battery module 2 are convenient.

[0050] As a preferred example, Figure 5 As shown in the figure, the roller assembly includes first rollers 3 arranged near both ends of the battery module 2 in the length direction, and second rollers 4 arranged near the middle position of the battery module 2. By making the roller assembly include two first rollers 3 and one second roller 4, the structure is simple and the movement is smooth.

[0051] In addition, in order to facilitate the limitation of the battery module 2, as a preferred implementation, Figure 6 As shown in the present embodiment, the support plate 101 is provided with two first grooves 5 which are recessed downward and spaced apart along the length direction of the support plate 101, and a second groove 6 located between the two first grooves 5. After the battery module 2 is loaded into the designated position on the battery rack 1, the two first rollers 3 can fall into the first grooves 5 respectively, and the second roller 4 can fall into the second groove 6. With such arrangement, after the first roller 3 falls into the first groove 5 and the second roller 4 falls into the second groove 6, the first groove 5 and the second groove 6 can limit the movement of the battery module 2, so that the battery module 2 is kept at the designated position on the battery rack 1, which is convenient for subsequent use.

[0052] Preferably, in this embodiment, the width of the first roller 3 is greater than the width of the second groove 6. Figure 5 and Figure 6As shown in , the width of the first roller 3 is H1, and the width of the second groove 6 is H2. The width of the first roller 3 is greater than the width of the second groove 6, which can prevent the first roller 3 from falling into the second groove 6 during the movement of the battery module 2, thereby affecting the disassembly and assembly operation of the battery module 2. In addition, the length L1 of the first groove 5 can be greater than the diameter of the first roller 3, and the length L2 of the second groove 6 can be greater than the diameter of the second roller 4, so that the rollers can easily fall into the corresponding grooves, and the diameters of the first roller 3 and the second roller 4 can be equal to ensure the stability of the battery module 2 during the movement, and the battery module 2 can maintain a horizontal posture after moving into place.

[0053] As a preferred implementation, in this embodiment, the support plate 101 is provided with a first guide surface 7 for guiding the first roller 3 to enter the first groove 5, and a second guide surface 8 for guiding the second roller 4 to enter the second groove 6. Figure 7 , Figure 8 and Fig. 9 As shown in the figure, the first guide surface 7 and the second guide surface 8 are both inclined slopes. By providing the first guide surface 7 and the second guide surface 8, it is possible to prevent the battery module 2 from suddenly falling after moving to a specified position, thereby causing an impact on the battery module 2 and having an adverse effect on the service life of the battery module 2.

[0054] The battery cluster of this embodiment allows the upper and lower layers of adjacent battery modules 2 to share a liquid cooling plate 202, which is beneficial to improving the volume energy density of the battery cluster, reducing the temperature difference between the upper and lower battery cells 2011, and improving the cycle life of the battery cells 2011. The upper and lower layers of battery modules 2 share the liquid cooling plate 202, which is beneficial to improving the cost performance of the product. The battery module 2 is easy to operate by sliding into or out of the accommodation space through rollers, which facilitates the maintenance and replacement of the battery module 2.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cluster, Features: It includes a battery rack and a plurality of battery modules stacked up and down on the battery rack; The battery module includes a battery cell unit, a liquid cooling plate arranged at the bottom of the battery cell unit, and a thermal conductive adhesive layer arranged at the top of the battery cell unit; The liquid cooling plate of the battery module located at the upper layer abuts against the thermally conductive adhesive layer of the adjacent battery module located at the lower layer.

2. The battery cluster according to claim 1, Features: The battery cell unit includes two first end plates arranged at intervals, two second end plates connected between the two first end plates, and a plurality of battery cells arranged in sequence between the two first end plates.

3. The battery cluster according to claim 2, Features: The two second end plates and the thermally conductive adhesive layer form a receiving groove for receiving the liquid cooling plate of the battery module on the upper layer.

4. The battery cluster according to claim 3, Features: An end of the liquid cooling plate close to the first end plate is provided with a protruding portion extending out of the battery rack, and the protruding portion is provided with a liquid inlet and a liquid outlet.

5. The battery cluster according to claim 1, Features: The battery rack includes a rack body and a support plate arranged on the rack body; The support plate supports both ends of the battery module in a width direction.

6. The battery cluster according to claim 5, Features: The frame body has a receiving space with an opening on one side, and the support plate is arranged in the receiving space; Roller assemblies are provided at both ends of the battery module in the width direction, and the battery module can slide into or out of the accommodating space through the roller assemblies.

7. The battery cluster according to claim 6, Features: The roller assembly includes a first roller disposed near both ends of the battery module in a length direction, and a second roller disposed near a middle position of the battery module.

8. The battery cluster according to claim 7, Features: The support plate is provided with two first grooves which are recessed downward and spaced apart along the length direction of the support plate, and a second groove located between the two first grooves; After the battery module is installed in a designated position on the battery rack, the two first rollers can fall into the first grooves respectively, and the second roller can fall into the second groove.

9. The battery cluster according to claim 8, Features: The width of the first roller is greater than the width of the second groove.

10. The battery cluster according to claim 8, Features: The support plate is provided with a first guide surface for guiding the first roller to enter the first groove, and a second guide surface for guiding the second roller to enter the second groove.

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