Battery cabinet structure and energy storage device with same

Abstract

The invention provides a battery cabinet structure and an energy storage device with the same, and the battery cabinet structure comprises a shell cabinet; the mounting rack is arranged in the shell cabinet, the mounting rack and the inner surface of the shell cabinet are arranged at an interval, and a first cooling oil channel is formed between the mounting rack and the inner surface of the shell cabinet; the mounting tray assembly is connected with the mounting frame, the mounting tray assembly comprises a plurality of tray structures which are arranged at intervals in the vertical direction, each tray structure comprises a plurality of sub-trays which are arranged in the transverse direction, every two adjacent sub-trays are arranged at intervals, a circulation gap is formed between every two adjacent sub-trays, and the circulation gaps of the plurality of tray structures form a second cooling oil circulation channel; and the plurality of battery modules are arranged on the sub-trays. According to the technical scheme, the problems of low heat dissipation efficiency and non-uniform heat dissipation efficiency in related technologies can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and in particular, to a battery cabinet structure and an energy storage device having the same. Background Art

[0002] In the related art, a traditional energy storage device usually includes a battery cabinet structure, which generally includes a battery cabinet body and a plurality of battery modules arranged in the battery cabinet body. These battery modules are usually stacked together to reduce the floor area of the battery cabinet body. To dissipate heat from the plurality of battery modules in this battery cabinet structure, a liquid cooling tube plate is usually provided at the bottom of the lowermost battery module among the plurality of battery modules, and the heat of the battery module is indirectly taken away by the flow of the coolant for heat dissipation and temperature control. However, with this heat dissipation method, both the heat conduction efficiency and the heat dissipation rate are relatively poor, and the problem of large temperature difference between the "hot head and cold feet" of the battery during charging and discharging cannot be solved, that is, there is uneven heat dissipation. At the same time, it is also impossible to solve the condensation water generated inside and outside the liquid cooling tube plate box for accommodating the liquid cooling tube plate in the battery cabinet structure due to the temperature difference, resulting in a decrease in the insulation value of the battery module and increasing the electrical safety risk. Summary of the Invention

[0003] The main object of the present invention is to provide a battery cabinet structure and an energy storage device having the same, so as to solve the problems of low heat dissipation efficiency and uneven heat dissipation efficiency in the related art.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided a battery cabinet structure, including: an outer cabinet; a mounting rack disposed in the outer cabinet and spaced from the inner surface of the outer cabinet, a first cooling oil channel being formed between the mounting rack and the inner surface of the outer cabinet; a mounting tray assembly connected to the mounting rack, the mounting tray assembly including a plurality of tray structures spaced in the vertical direction, each tray structure including a plurality of sub-trays arranged in the horizontal direction, a circulation gap being formed between adjacent two sub-trays and spaced apart, and the circulation gaps of the plurality of tray structures forming a second cooling oil circulation channel; and a plurality of battery modules disposed on the sub-trays.

[0005] Further, the mounting rack includes a plurality of columns, the battery cabinet structure further includes a communication wire harness, the communication wire harness includes a main wire harness and a plurality of branch wire harnesses, the columns are cylindrical structures, the main wire harness is located inside the cylindrical structure, and the branch wire harnesses are connected between the main wire harness and the battery modules.

[0006] Further, the battery cabinet structure further includes a plurality of metal connection pieces connected between two battery modules.

[0007] Further, the metal connecting piece includes a first connecting piece which is connected between battery modules adjacent in the vertical direction. The first connecting piece includes a piece body, and a first connecting head and a second connecting head respectively arranged at both ends of the piece body. The first connecting head and the second connecting head are used for electrically connecting with the battery modules.

[0008] Further, the battery cabinet structure further includes a power harness. The metal connecting piece includes a second connecting piece. The lower end of the second connecting piece is connected to the uppermost battery module, and the power harness is connected to the upper end of the second connecting piece.

[0009] Further, the metal connecting piece includes a third connecting piece which is connected between the lowermost battery modules adjacent in the horizontal direction. The third connecting piece extends along the horizontal direction.

[0010] Further, the battery module and the sub-tray are fixedly connected by bolts; and / or, a handle structure is provided on the battery module.

[0011] According to another aspect of the present invention, there is provided an energy storage device, including a battery cabinet structure and a radiator. The battery cabinet structure is the above-mentioned battery cabinet structure, and the oil-cooled radiator is communicated with the first cooling oil channel and the second cooling oil circulation channel of the battery cabinet structure.

[0012] Further, the oil-cooled radiator includes a radiator body which has a cooling oil heat exchange channel. The cooling oil heat exchange channel includes sub-channels distributed along a preset direction, and adjacent sub-channels are connected end to end.

[0013] Further, a heat dissipation air duct is provided on the outer periphery of each sub-channel.

[0014] Applying the technical solution of the present invention, the outer cabinet is used to protect other structures inside the battery cabinet structure. The mounting rack is arranged inside the outer cabinet and is spaced from the inner surface of the outer cabinet. The mounting rack provides a mounting basis for other structures inside the battery cabinet structure; the mounting tray assembly is connected to the mounting rack. The mounting tray assembly includes a plurality of tray structures spaced in the vertical direction, so that the battery modules can be stacked in the vertical direction, thereby controlling the overall floor area of the battery cabinet structure. A first cooling oil channel is formed between the mounting rack and the inner surface of the outer cabinet, so that the battery modules are also spaced from the inner surface of the outer cabinet. Furthermore, the cooling oil can flow in the first cooling oil channel and contact the outer surface of the battery modules, thereby dissipating heat from the battery modules; in addition, the tray structure includes a plurality of sub-trays arranged in the horizontal direction. There is a gap between adjacent two sub-trays and a circulation gap is formed. A plurality of battery modules are arranged on the sub-trays, so that the cooling oil can flow through the circulation gap. A plurality of circulation gaps form a second cooling oil circulation channel, so that the cooling oil can flow through the inside of the mounting tray assembly in the vertical direction, so that the cooling oil can contact the relatively inner surface of the battery modules, thereby increasing the contact area of the battery modules and further improving the heat dissipation efficiency; through the first cooling oil channel and the second cooling oil circulation channel, on the one hand, the heat dissipation efficiency of the battery modules in the battery cabinet structure is ensured, and on the other hand, even the battery modules located at the upper part can contact the cooling oil, thereby ensuring the heat dissipation uniformity of the battery cabinet structure. Therefore, the technical solution of the present application can effectively solve the problems of low heat dissipation efficiency and uneven heat dissipation efficiency in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 The rear view schematic diagram of a part of the structure of the battery cabinet structure according to an embodiment of the present invention is shown;

[0017] Figure 2 It shows Figure 1 The front view schematic diagram of a part of the structure of the battery cabinet structure of

[0018] Figure 3 The principle schematic diagram of the radiator of the energy storage device according to an embodiment of the present invention is shown.

[0019] Wherein, the above-mentioned accompanying drawings include the following reference numerals:

[0020] 10. Mounting rack; 11. Column;

[0021] 20. Installation tray assembly; 21. Tray structure; 22. Second cooling oil flow passage;

[0022] 30. Battery module;

[0023] 40. Communication harness; 41. Main harness; 42. Branch harness;

[0024] 50. Metal connecting piece; 51. First connecting piece; 511. Piece main body; 512. First connecting head; 513. Second connecting head; 52. Second connecting piece; 53. Third connecting piece;

[0025] 60. Power harness;

[0026] 70. Radiator; 71. Radiator body; 72. Cooling oil heat exchange passage; 721. Sub-channel. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that the terms used here are only for describing the specific implementation mode and are not intended to limit the exemplary implementation mode according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0029] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] As Figure 1 and Figure 2 shown, the present application provides a battery cabinet structure. Embodiments of the battery cabinet structure of the present application include: an outer cabinet, a mounting rack 10, a mounting tray assembly 20, and a plurality of battery modules 30; the mounting rack 10 is disposed inside the outer cabinet and is spaced apart from the inner surface of the outer cabinet, and a first cooling oil channel is formed between the mounting rack 10 and the inner surface of the outer cabinet; the mounting tray assembly 20 is connected to the mounting rack 10, the mounting tray assembly 20 includes a plurality of tray structures 21 spaced apart in the vertical direction, the tray structure 21 includes a plurality of sub-trays arranged in the horizontal direction, and a circulation gap is formed between adjacent two sub-trays, and the circulation gaps of the plurality of tray structures 21 form a second cooling oil circulation channel 22; the plurality of battery modules 30 are disposed on the sub-trays.

[0031] Applying the technical solution of this embodiment, the outer cabinet is used to protect other structures inside the battery cabinet structure. The mounting rack 10 is arranged inside the outer cabinet and is spaced from the inner surface of the outer cabinet. The mounting rack 10 provides a mounting foundation for other structures inside the battery cabinet structure; the mounting tray assembly 20 is connected to the mounting rack 10. The mounting tray assembly 20 includes a plurality of tray structures 21 spaced in the vertical direction, so that the battery modules 30 can be stacked in the vertical direction, thereby controlling the overall floor area of the battery cabinet structure. A first cooling oil channel is formed between the mounting rack 10 and the inner surface of the outer cabinet, so that the battery modules 30 are also spaced from the inner surface of the outer cabinet. Furthermore, the cooling oil can flow in the first cooling oil channel and contact the outer surface of the battery modules 30, thereby dissipating heat from the battery modules 30; in addition, the tray structure 21 includes a plurality of sub-trays arranged in the horizontal direction. There is a gap between adjacent two sub-trays to form a circulation gap. A plurality of battery modules 30 are arranged on the sub-trays, so that the cooling oil can flow through the circulation gap. A plurality of circulation gaps form a second cooling oil circulation channel 22, so that the cooling oil can flow through the inside of the mounting tray assembly 20 in the vertical direction, so that the cooling oil can contact the relatively inner surface of the battery modules 30, thereby increasing the contact area of the battery modules 30, and further improving the heat dissipation efficiency; through the first cooling oil channel and the second cooling oil circulation channel 22, on the one hand, the heat dissipation efficiency of the battery modules 30 inside the battery cabinet structure is ensured, and on the other hand, even the battery modules 30 located in the upper part can contact the cooling oil, thereby ensuring the heat dissipation uniformity of the battery cabinet structure. Therefore, the technical solution of this embodiment can effectively solve the problems of low heat dissipation efficiency and uneven heat dissipation efficiency in the related art.

[0032] It should be noted that the statement "the tray structure 21 includes a plurality of sub-trays arranged in the horizontal direction" means that the sub-trays can be either a split structure or an integral structure. If the sub-trays are a split structure, the circulation gap is formed between two sub-trays. If the sub-trays are an integral structure, it means that a plurality of gaps are directly processed on the tray structure 21, and these gaps are both the circulation gaps and the dividing lines of the sub-trays. In addition, it should be noted that the battery modules 30 can be placed on the sub-trays or not, depending on the needs. The cooling oil is a cooling medium, and as long as it has a cooling effect and an insulating effect, it can be called cooling oil.

[0033] Such as Figure 1 And Figure 2As shown, the mounting bracket 10 includes a plurality of columns 11. The battery cabinet structure further includes a communication wire harness 40. The communication wire harness 40 includes a main wire harness 41 and a plurality of branch wire harnesses 42. The column 11 is a cylindrical structure. The main wire harness 41 is located inside the cylindrical structure. The branch wire harnesses 42 are connected between the main wire harness 41 and the battery modules 30. Specifically, the communication wire harness 40 is used to transmit signals related to the battery modules 30, such as signals for controlling the battery modules 30 or temperature signals, pressure signals, etc. of the battery modules 30. By arranging the main wire harness 41 inside the column 11, the contact probability between the main wire harness 41 and other structures of the battery cabinet structure is effectively reduced, the probability of the main wire harness 41 being scratched and damaged is reduced, and the electrical safety risk is lowered.

[0034] As Figure 1 and Figure 2 shown, the battery cabinet structure further includes a plurality of metal connecting pieces 50. The metal connecting pieces 50 are connected between two battery modules 30. Specifically, in the related art, in the arrangement of the traditional battery cabinet structure, the total positive electrode and the total negative electrode are usually located at the top or bottom of the battery cabinet structure. In this way, each battery module needs to use a wire harness to connect to the total positive electrode and the total negative electrode, which will increase the wire harness material consumption, cost, and the longer the wire harness, the higher the risk of the wire harness being scratched. In this embodiment, using the metal connecting pieces 50 to connect a plurality of battery modules 30 reduces the use of wire harnesses, lowers the cost, and also avoids the risk of the wire harness being scratched and damaged due to excessive and long wire harnesses, further reducing the electrical risk.

[0035] As Figure 1 and Figure 2 shown, the metal connecting piece 50 includes a first connecting piece 51. The first connecting piece 51 is connected between the battery modules 30 adjacent in the vertical direction. The first connecting piece 51 includes a piece body 511 and a first connecting head 512 and a second connecting head 513 respectively arranged at both ends of the piece body 511. The first connecting head 512 and the second connecting head 513 are used for electrical connection with the battery modules 30. Specifically, the first connecting piece 51 is used to connect the battery modules 30 arranged in the vertical direction. The first connecting head 512 and the second connecting head 513 realize the electrical connection between the metal connecting piece 50 and the battery modules 30, thereby realizing the electrical connection between the battery modules 30.

[0036] As Figure 1 and Figure 2 shown, the battery cabinet structure further includes a power wire harness 60. The metal connecting piece 50 includes a second connecting piece 52. The lower end of the second connecting piece 52 is connected to the uppermost battery module 30. The power wire harness 60 is connected to the upper end of the second connecting piece 52. Specifically, the second connecting piece 52 can form the total positive electrode and the total negative electrode of the plurality of battery modules 30 in the battery cabinet structure, so that the power wire harness 60 can be electrically connected to the total positive electrode and the total negative electrode of the battery modules 30.

[0037] As Figure 1 and Figure 2 shown, the metal connecting piece 50 includes a third connecting piece 53. The third connecting piece 53 is connected between the lowermost battery modules 30 adjacent in the lateral direction, and the third connecting piece 53 extends in the lateral direction. Specifically, the third connecting piece 53 is used to connect the battery modules 30 in the lateral direction, increasing the flexibility of the connection between the battery modules 30.

[0038] In addition, in this embodiment, the battery module 30 and the sub-tray are fixedly connected by bolts, so that the connection between the battery module 30 and the sub-tray is more stable. A handle structure is provided on the battery module 30, which facilitates the user to install or disassemble the battery module 30.

[0039] As Figures 1 to 3 shown, the present application also provides an energy storage device. The energy storage device of the present application includes a battery cabinet structure and a radiator 70. Among them, the battery cabinet structure is the above-mentioned battery cabinet structure. The above-mentioned battery cabinet structure can effectively solve the problems of low heat dissipation efficiency and uneven heat dissipation efficiency in the related art, and the energy storage device with the above-mentioned battery cabinet structure also has the above-mentioned advantages.

[0040] Specifically, the radiator 70 is communicated with the first cooling oil channel and the second cooling oil circulation channel 22 of the battery cabinet structure. In this way, the cooling oil in the first cooling oil channel and the second cooling oil circulation channel 22 can flow into the radiator 70 for heat dissipation, and then can circulate and enter the first cooling oil channel and the second cooling oil circulation channel 22 again.

[0041] As Figure 3 shown, the radiator 70 includes a radiator body 71. The radiator body 71 has a cooling oil heat exchange channel 72. The cooling oil heat exchange channel 72 includes sub-channels 721 distributed along a preset direction, and adjacent sub-channels 721 are connected end to end. With such a setting, the cooling oil heat exchange channel 72 forms a tortuous "S"-shaped circulation channel, so that the circulation path is longer, and thus the heat dissipation effect of the cooling oil is better.

[0042] In addition, a heat dissipation air duct is provided on the outer periphery of each sub-channel 721. Specifically, by providing a heat dissipation air duct in each sub-channel 721, it is ensured that the cooling oil in each sub-channel 721 can be dissipated.

[0043] Adopting the battery cabinet structure and the energy storage device of this embodiment can have the following effects:

[0044] 1. There is a flow channel for the cooling oil (i.e., the second cooling oil circulation channel 22) between the battery modules 30, and there is also a flow channel for the cooling oil (i.e., the first cooling oil circulation channel) on the side of the battery module 30 close to the column 11, so that the cooling oil is in full contact with all surfaces of the battery module 30, increasing the contact area between the battery module 30 and the cooling oil, shortening the heat conduction distance, making the heat conduction of the battery module 30 more timely, reducing the heat conduction path, and improving the heat conduction efficiency. The battery module 30 is immersed in the cooling oil, and all components of the battery module 30 are immersed in the cooling oil. The temperatures of all components inside the cabinet are basically the same, eliminating the problem of condensate water caused by a large temperature difference and improving the heat dissipation uniformity. It improves the temperature control effects of traditional liquid cooling and air cooling, making the temperature consistency of the battery modules 30 at different positions (upper, middle, and lower) better and extending the service life of the battery cabinet structure in cycles.

[0045] 2. The battery modules 30 are connected using metal connecting pieces 50, reducing the types of materials and improving the efficiency of production, processing, and assembly. After being connected and aggregated through a step-by-step assembly method, the total positive and total negative connection buses will all be led out at the topmost layer of the cabinet; the total positive and total negative are located at the top of the cabinet, facilitating installation, maintenance, and repair and reducing the usage of wire harnesses.

[0046] 3. The main wire harness 41 of the communication wire harness 40 utilizes the inside of the column 11. It effectively reduces the contact probability between the communication wire harness 40 and other components, decreases the occurrence probability of the wire harness being scratched and damaged, and reduces the electrical safety risk.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc., are usually based on the orientation or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Without contrary explanations, these orientation words do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0048] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A battery cabinet structure, characterized in that: include: Enclosure cabinet; A mounting frame (10) is arranged in the outer shell cabinet and is spaced apart from the inner surface of the outer shell cabinet, and a first cooling oil channel is formed between the mounting frame (10) and the inner surface of the outer shell cabinet; A mounting tray assembly (20) connected to the mounting frame (10), the mounting tray assembly (20) comprising a plurality of tray structures (21) arranged at intervals in the vertical direction, the tray structure (21) comprising a plurality of sub-trays arranged in the transverse direction, two adjacent sub-trays being arranged at intervals to form a flow gap, the flow gaps of the plurality of tray structures (21) forming a second cooling oil flow channel (22); A plurality of battery modules (30) are arranged on the sub-tray.

2. The battery cabinet structure according to claim 1, characterized in that: The mounting frame (10) includes a plurality of columns (11), the battery cabinet structure also includes a communication harness (40), the communication harness (40) includes a main harness (41) and a plurality of branch harnesses (42), the column (11) is a cylindrical structure, the main harness (41) is located inside the cylindrical structure, and the branch harness (42) is connected between the main harness (41) and the battery module (30).

3. The battery cabinet structure according to claim 1, characterized in that: The battery cabinet structure also includes a plurality of metal connecting plates (50), wherein the metal connecting plates (50) are connected between two of the battery modules (30).

4. The battery cabinet structure according to claim 3, characterized in that: The metal connecting sheet (50) comprises a first connecting sheet (51), wherein the first connecting sheet (51) is connected between battery modules (30) adjacent to each other in the vertical direction, wherein the first connecting sheet (51) comprises a sheet body (511) and a first connecting head (512) and a second connecting head (513) respectively arranged at two ends of the sheet body (511), wherein the first connecting head (512) and the second connecting head (513) are used for being electrically connected to the battery module (30).

5. The battery cabinet structure according to claim 3, characterized in that: The battery cabinet structure also includes a power harness (60), the metal connecting plate (50) includes a second connecting plate (52), the lower end of the second connecting plate (52) is connected to the uppermost battery module (30), and the power harness (60) is connected to the upper end of the second connecting plate (52).

6. The battery cabinet structure according to claim 3, characterized in that: The metal connecting piece (50) comprises a third connecting piece (53), wherein the third connecting piece (53) is connected between the battery modules (30) that are adjacent at the bottom in the transverse direction, and the third connecting piece (53) extends along the transverse direction.

7. The battery cabinet structure according to any one of claims 1 to 6, characterized in that: The battery module (30) is fixedly connected to the sub-tray via bolts; and / or, The battery module (30) is provided with a handle structure.

8. An energy storage device, comprising a battery cabinet structure and a radiator (70), characterized in that: The battery cabinet structure is the battery cabinet structure according to any one of claims 1 to 7, and the radiator (70) is connected to the first cooling oil channel and the second cooling oil circulation channel (22) of the battery cabinet structure.

9. The energy storage device according to claim 8, characterized in that: The radiator (70) comprises a radiator body (71), the radiator body (71) having a cooling oil heat exchange channel (72), the cooling oil heat exchange channel (72) comprising sub-channels (721) distributed along a preset direction, and adjacent sub-channels (721) are connected end to end.

10. The energy storage device according to claim 9, characterized in that: A heat dissipation duct is arranged on the periphery of each sub-channel (721).

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