Immersed energy storage battery box

Abstract

The invention relates to an immersed energy storage battery box which comprises an energy storage box and an electrical box, the electrical box is arranged on one side of the energy storage box and connected with the energy storage box, the energy storage box comprises a shell, at least one battery pack and a battery pack frame, and the multiple battery packs are evenly distributed on the battery pack frame and mechanically connected with the battery pack frame. The shell is of a closed cavity structure and is used for filling the closed cavity with cooling liquid, and the battery pack frame and the battery pack are arranged in the shell and are mechanically connected with the shell; the battery pack comprises batteries and a first guide plate; the first guide plate is arranged among the plurality of batteries; the battery pack is immersed in the cooling liquid, and the shell is connected with external cooling equipment through a pipeline to realize circulation of the cooling liquid; the immersed energy storage battery box is reasonable in structural design, the protection effect of the immersed energy storage battery box is ensured through the first flow guide plate, the second flow guide plate and the sealing cover, cooling is uniform, the internal temperature difference is small, and the working safety and reliability of a battery are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of energy storage battery boxes, and in particular relates to an immersion type energy storage battery box. Background Art

[0002] Energy storage battery boxes can achieve peak shaving and valley filling and improve the quality of electricity by collecting electric energy. Battery energy storage technology is a storage technology with good application prospects and rapid development, and occupies a mainstream position in the electrochemical energy storage market. With the large-scale application of electrochemical energy storage systems, their safety issues cannot be ignored. At present, battery energy storage systems generally use air cooling and liquid cooling plates to control the ambient temperature. With the increasing energy density of batteries in recent years, the heat dissipation problem has become more and more important. When the temperature between battery packs is high or the battery is overcharged or over-discharged, the battery is prone to thermal runaway and cause a fire. In severe cases, it may even cause the explosion of the entire energy storage system, causing losses that are difficult to assess. Higher cooling requirements are put forward for energy storage battery boxes to make the temperature between each battery more uniform and stable, with good consistency, and the charging and discharging process more reliable. Therefore, this patent has developed an immersion energy storage battery box to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide an immersion type energy storage battery box, which realizes the cooling problem of the energy storage box by utilizing the immersion type structure and layout design of the battery pack, has good cooling effect, good reliability and safety, and effectively meets the specific needs of users.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides an immersion-type energy storage battery box, comprising: an energy storage box, an electrical box, wherein the electrical box is arranged on one side of the energy storage box and connected thereto, the energy storage box comprises: a shell, at least one battery pack, and a battery pack frame, wherein a plurality of the battery packs are evenly distributed on the battery pack frame and mechanically connected thereto, the shell is a closed cavity structure for filling the closed cavity thereof with coolant, the battery pack frame together with the battery pack are arranged inside the shell and mechanically connected to the shell; the battery pack comprises batteries and a first guide plate, wherein the first guide plate is arranged between a plurality of the batteries for cooling the batteries; the battery pack is immersed in the coolant, and the shell is connected to an external cooling device through a pipeline to realize the circulation of the coolant.

[0005] Furthermore, the first guide plate is provided with a guide groove for realizing the flow of the coolant in the guide groove.

[0006] Furthermore, the energy storage box also includes: a second guide plate, which is arranged on the upper part of the shell and mechanically connected to the shell, and the second guide plate is provided with guide holes, and a plurality of guide holes are evenly distributed on the second guide plate to achieve uniform flow of coolant.

[0007] Furthermore, the energy storage box further comprises: a sealing cover, on which a sealing ring is arranged, the sealing cover is arranged on the upper part of the shell and is mechanically connected to the shell through the sealing ring to achieve sealing of the shell.

[0008] Furthermore, the energy storage box also includes: a confluence trough, which is arranged at the lower part of the shell and is mechanically connected to the shell; the confluence trough is provided with a liquid outlet for collecting and outflowing the coolant.

[0009] Furthermore, the shell includes an outer shell and an inner shell, and the sealing cover, the confluence groove, and the second guide plate are all connected to the inner shell to achieve sealing of the inner shell.

[0010] Furthermore, the shell also includes a liquid inlet, which is located above the second guide plate and is arranged on the shell. The liquid inlet and the liquid outlet are connected to an external cooling device to realize the circulation of coolant inside the shell.

[0011] Furthermore, the shell also includes a shell frame for reinforcing the strength of the shell.

[0012] Furthermore, the battery pack also includes an end plate and a bracket, and the end plate and the first guide plate are mechanically connected to the battery pack frame through the bracket to achieve installation and fixation of the battery and the first guide plate.

[0013] The present invention relates to an immersion type energy storage battery box, and has the following beneficial effects: the immersion type energy storage battery box of the present invention adopts an immersion type design for a battery pack, and has a reasonable structural design. The structural design of the guide groove on the first guide plate realizes the cooling of each battery, and the uniform flow of the coolant from top to bottom is realized through a plurality of guide holes evenly distributed on the second guide plate. The sealing cover ensures the waterproof and dustproof effect of the immersion type energy storage battery box. The present invention has good cooling effect, uniform cooling, and small internal temperature difference, which is conducive to improving the charging and discharging consistency of the battery, thereby improving the working safety and reliability of the battery, and meeting the specific needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0015] Figure 1 A schematic diagram of a partial three-dimensional structure of an immersion energy storage battery box provided in an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the three-dimensional structure of an immersion energy storage battery box provided in an embodiment of the present invention;

[0017] Figure 3 A schematic diagram of a partial three-dimensional structure of another submerged energy storage battery box provided by an embodiment of the present invention;

[0018] Figure 4 A left view of an immersion energy storage battery box provided in an embodiment of the present invention;

[0019] Figure 5 A cross-sectional view of an immersion energy storage battery box provided by an embodiment of the present invention;

[0020] Figure 6 A schematic diagram of a three-dimensional structure of a housing frame provided in an embodiment of the present invention;

[0021] Figure 7 A schematic diagram of the three-dimensional structure of a confluence trough provided in an embodiment of the present invention;

[0022] Figure 8 A schematic diagram of a three-dimensional structure of a battery pack frame provided in an embodiment of the present invention;

[0023] Fig. 9 A schematic diagram of the three-dimensional structure of a battery pack provided in an embodiment of the present invention;

[0024] Fig.10 A schematic diagram of the distribution of the first guide plate provided in an embodiment of the present invention;

[0025] Fig.11 A schematic diagram of the three-dimensional structure of a first guide plate provided in an embodiment of the present invention;

[0026] Fig.12 for Fig.11 Partial schematic diagram of part B.

[0027] In the figure:

[0028] 1. Energy storage box; 11. Shell; 111. Shell frame; 112. Outer shell; 113. Inner shell; 114. Liquid inlet; 12. Battery pack; 121. Battery; 122. First guide plate; 1221. Guide groove; 123. End plate; 124. Bracket; 13. Battery pack frame; 14. Confluence groove; 141. Liquid outlet; 15. Sealing cover; 151. Sealing ring; 16; Second guide plate; 161. Guide hole; 2. Electrical box. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. It should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected 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 invention can be understood according to specific circumstances.

[0032] An immersion energy storage battery box according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0033] Example

[0034] Figure 1 A partial three-dimensional structural schematic diagram of an immersion energy storage battery box provided by an embodiment of the present invention is shown; Figure 2 A schematic diagram of the three-dimensional structure of an immersion energy storage battery box provided by an embodiment of the present invention is shown; Figure 3 A partial three-dimensional structural schematic diagram of another submerged energy storage battery box provided by an embodiment of the present invention is shown; Figure 4 A left view of an immersion energy storage battery box provided by an embodiment of the present invention is shown; Figure 5 A cross-sectional view of an immersion energy storage battery box provided by an embodiment of the present invention is shown; Figure 6 A schematic diagram of a three-dimensional structure of a housing frame provided by an embodiment of the present invention is shown; Figure 7A schematic diagram of the three-dimensional structure of a confluence trough provided in an embodiment of the present invention is shown; Figure 8 A schematic diagram of the three-dimensional structure of a battery pack frame provided by an embodiment of the present invention is shown; Fig. 9 A schematic diagram of the three-dimensional structure of a battery pack provided by an embodiment of the present invention is shown;

[0035] Fig.10 A schematic diagram of the distribution of the first guide plate provided in an embodiment of the present invention is shown; Fig.11 A schematic diagram of the three-dimensional structure of a first guide plate provided in an embodiment of the present invention is shown; Fig.12 Shows Fig.11 Partial schematic diagram of part B. Figures 1 to 12 As shown, an immersion energy storage battery box provided by an embodiment of the present invention includes: an energy storage box 1, an electrical box 2, wherein the electrical box 2 is arranged on one side of the energy storage box 1 and connected thereto, the electrical box 2 is mechanically and electrically connected to the energy storage box 1, the electrical box 2 and the energy storage box 1 adopt a left-right layout structure, and the two boxes are separately arranged to reduce mutual interference, and have good maintainability. The electrical box 2 is used to electrically connect the battery pack 12 in the energy storage box 1 to achieve the monitoring and charge and discharge control management functions of the battery pack 12. In this way, the electrical box 2 and the energy storage box 1 form a relatively complete energy storage system, forming an immersion energy storage battery box. Specifically, the energy storage box 1 includes: a shell 11, at least one battery pack 12, and a battery pack frame 13. Several battery packs 12 are evenly distributed on the battery pack frame 13 and are mechanically connected to the battery pack frame 13 to achieve the fixation of the battery pack 12, so as to achieve the battery pack 12. Figure 1 For example, an immersion energy storage battery box provided in an embodiment of the present invention includes eight battery packs 12, wherein the number of battery packs 12 can be increased or decreased according to the specific needs of users, and the number of battery packs 12 is not specifically limited here; wherein the shell 11 is a closed cavity structure for filling the coolant in its closed cavity, and the shell 11 can be used to prevent the leakage of the coolant inside it through sealing treatment, wherein the battery pack frame 13 together with the battery pack 12 are arranged inside the shell 11 and mechanically connected to the shell 11, In this way, the battery pack frame 13 and the battery pack 12 are immersed in the coolant, and the cooling effect on the battery pack 12 is more effective than air cooling or liquid cooling pipelines. Of course, the coolant here is electrically insulating, which can effectively prevent the electrodes in the battery pack 12 from short-circuiting. More specifically, the battery pack 12 includes a battery 121 and a first guide plate 122. A plurality of batteries 121 are connected in series and in parallel to form the battery pack 12, wherein the first guide plate 122 is arranged between the plurality of batteries 121 to achieve cooling of the battery 121. Fig.10A distribution form of several first guide plates 122 is shown, so that each battery 121 can be in contact with and connected to the first guide plate 122. The first guide plate 122 is provided with a guide groove 1221 for realizing the flow of coolant in the guide groove 1221. The circulation of the coolant in the guide groove 1221 is utilized to quickly take away the heat generated by the battery 121 during operation. The shell 11 is connected to an external cooling device through a pipeline to realize the circulation of the coolant in the energy storage box 1, thereby realizing the cooling of each battery 121. The battery pack 12 is completely immersed in the coolant, and the cooling effect is good. The setting of the first guide plate 122 reduces the temperature difference between the batteries 121 and improves the charge and discharge consistency, which is beneficial to improving the service life, working reliability and safety of the battery 121.

[0036] Furthermore, in order to realize the installation and fixation of the battery 121, the battery pack 12 also includes an end plate 123 and a bracket 124, wherein the end plate 123 and the first guide plate 122 are mechanically connected to the battery pack frame 13 through the bracket 124 to realize the installation and fixation of the battery 121 and the first guide plate 122; a plurality of batteries 121 are evenly distributed and fixed on the bracket 124 through the first guide plate 122, and the end plates 123 are distributed at least one end of the front, rear, left and right of the battery pack 12 and are mechanically connected to the bracket 124, thereby realizing the fixation of the battery 121 in the battery pack 12. Fig. 9 A set of end plates 123 are provided at the left and right ends of the battery pack 12 shown in the figure, which can prevent the battery 121 from loosening or even falling off on the bracket 124; the bracket 124 is mechanically connected to the battery pack frame 13 to achieve the installation and fixation of the battery pack 12 on the battery pack frame 13.

[0037] In the submerged energy storage battery box provided in the embodiment of the present invention, the energy storage box 1 further includes: a sealing cover 15, on which a sealing ring 151 is arranged, the sealing cover 15 is arranged on the upper part of the shell 11 and is mechanically connected to the shell 11 through the sealing ring 151 to achieve the sealing of the shell 11; preferably, the sealing cover 15 can be made of rubber, foam, etc., including but not limited to the above materials. The sealing cover 15 is adapted to the shape of the shell 11 at the sealing ring 151, and the sealing ring 151 is squeezed to deform it to achieve the sealing of the top of the shell 11, so that the energy storage box 1 can have good dustproof and waterproof effects. The use of the sealing cover 15 and the sealing ring 151 makes the submerged energy storage battery box have good protective effects, such as dustproof and waterproof.

[0038] In the submerged energy storage battery box provided in the embodiment of the present invention, the energy storage box 1 further includes: a confluence groove 14, which is arranged at the lower part of the shell 11 and is mechanically connected to the shell 11. The mechanical connection between the confluence groove 14 and the shell 11 is generally welded to ensure the sealing effect of the mechanical connection and prevent the coolant from leaking at the connection; the confluence groove 14 is provided with a liquid outlet 141 for collecting and outflowing the coolant; Figure 7 A structural form of the confluence groove 14 is shown in the figure. Preferably, the confluence groove 14 is in a funnel shape to facilitate the collection and discharge of the coolant. The liquid outlet 141 is arranged in the middle position of the confluence groove 14, and is mainly used to connect an external cooling device to realize the circulation of the coolant in the shell 11.

[0039] In the submerged energy storage battery box provided in the embodiment of the present invention, the shell 11 includes an outer shell 112 and an inner shell 113. The shell 11 here adopts a double-layer structure. It is only necessary to ensure the overall sealing of the inner shell 113 to avoid leakage of the coolant. The sealing cover 15 and the confluence groove 14 are mechanically connected to the inner shell 113 to achieve the sealing of the inner shell 113. In this way, the coolant circulates in the inner shell 113, thereby achieving a cooling effect on the battery pack 12 in the inner shell 113.

[0040] In the submerged energy storage battery box provided by the embodiment of the present invention, further, the energy storage box 1 thereof further includes: a second guide plate 16, specifically, the second guide plate 16 is arranged on the upper part of the shell 11 and connected to the inner shell 113, and the second guide plate 16 and the inner shell 113 can be connected by mechanical connection, welding, adhesive connection, etc.; the second guide plate 16 is provided with guide holes 161, and a plurality of guide holes 161 are evenly arranged on the second guide plate 16 for realizing uniform flow of the coolant; wherein the shell 11 further includes a liquid inlet 114, and the liquid inlet 114 is located above the second guide plate 16 and is arranged on the shell 11, so that after the coolant enters from the liquid inlet 114, it flows evenly from top to bottom into the energy storage battery box through the guide holes 161 on the second guide plate 16, the coolant flows more evenly, the cooling effect is better, and the temperature difference between each battery group 12 is smaller, so that the temperature difference of the working environment of different batteries 121 is small, the charging and discharging consistency is better, and the service life and working reliability of the battery 121 are improved. The liquid inlet 114 and the liquid outlet 141 are connected to an external cooling device through a pipeline to realize the circulation of the coolant inside the shell 11, and the external cooling device provides the necessary power matching for the coolant circulation. In this way, in the submerged energy storage battery box provided by the embodiment of the present invention, the coolant flows in from the upper part of the energy storage box 1 and flows out from the lower part of the energy storage box 1, and can achieve the technical effect of an initial temperature of 300K, a flow rate of 40L / min, a pressure difference of 19KPa, and a temperature difference of about 2°C.

[0041] In the submerged energy storage battery box provided in the embodiment of the present invention, the shell 11 also includes a shell frame 111 for strengthening the strength of the shell 11, and the outer shell 112 and the inner shell 113 are mechanically connected to the shell frame 111 to ensure that the shell 11 does not undergo unexpected force deformation, thereby ensuring the necessary strength and rigidity of the shell 11.

[0042] Compared with the prior art, the present invention relates to an immersion-type energy storage battery box that adopts an immersion design for the battery pack 12, and has a reasonable structural design. The structural design of the guide groove 1221 on the first guide plate 122 realizes the cooling of each battery 121, and the uniform circulation flow of the coolant from top to bottom is realized through the multiple guide holes 161 evenly distributed on the second guide plate 16. The sealing cover 15 ensures the waterproof and dustproof effect of the immersion-type energy storage battery box. The present invention has good cooling effect, uniform cooling, and small internal temperature difference, which is beneficial to improving the charging and discharging consistency of the battery 121, thereby improving the working safety and reliability of the battery 121, and meeting the specific needs of users.

[0043] There are a few points to note:

[0044] (1) Unless otherwise defined, in the embodiments of the present invention and the accompanying drawings, the same reference numerals represent the same meanings.

[0045] (2) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention, and other structures may refer to the general design.

[0046] (3) For the sake of clarity, in the drawings used to describe the embodiments of the present invention, some structures in the drawings may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale.

[0047] (4) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An immersion energy storage battery box, characterized in that: include: An energy storage box (1) and an electrical box (2), wherein the electrical box (2) is arranged on one side of the energy storage box (1) and connected thereto, wherein the energy storage box (1) comprises: a shell (11), at least one battery pack (12), and a battery pack frame (13), wherein a plurality of battery packs (12) are evenly distributed on the battery pack frame (13) and mechanically connected thereto, wherein the shell (11) is a closed cavity structure for filling a cooling liquid in its closed cavity, wherein the battery pack frame (13) and the battery pack (12) are both arranged inside the shell (11) and mechanically connected to the shell (11); wherein the battery pack (12) comprises a battery (121) and a first guide plate (122), wherein the first guide plate (122) is arranged between a plurality of the batteries (121) and used to cool the batteries (121); wherein the battery pack (12) is immersed in the cooling liquid, and the shell (11) is connected to an external cooling device via a pipeline to realize the circulation of the cooling liquid.

2. The submerged energy storage battery box according to claim 1, characterized in that: The first guide plate (122) is provided with a guide groove (1221) for realizing the flow of the cooling liquid in the guide groove (1221).

3. The submerged energy storage battery box according to claim 2, characterized in that: The energy storage box (1) further comprises: a second guide plate (16), the second guide plate (16) being arranged on the upper part of the shell (11) and being mechanically connected to the shell (11), the second guide plate (16) being provided with guide holes (161), and a plurality of guide holes (161) being evenly distributed on the second guide plate (16) for achieving uniform flow of the coolant.

4. The submerged energy storage battery box according to claim 3, characterized in that: The energy storage box (1) further comprises: a sealing cover (15), on which a sealing ring (151) is provided; the sealing cover (15) is arranged on the upper part of the housing (11) and is mechanically connected to the housing (11) via the sealing ring (151) to achieve sealing of the housing (11).

5. The submerged energy storage battery box according to claim 4, characterized in that: The energy storage box (1) further comprises: a confluence groove (14), the confluence groove (14) being arranged at the lower part of the shell (11) and being mechanically connected to the shell (11); the confluence groove (14) being provided with a liquid outlet (141) for collecting and outflowing the cooling liquid.

6. The submerged energy storage battery box according to claim 5, characterized in that: The housing (11) comprises an outer shell (112) and an inner shell (113); the sealing cover (15), the confluence groove (14), and the second guide plate (16) are all connected to the inner shell (113) to achieve sealing of the inner shell (113).

7. The submerged energy storage battery box according to claim 6, characterized in that: The shell (11) further comprises a liquid inlet (114), the liquid inlet (114) being located above the second guide plate (16) and arranged on the shell (11), the liquid inlet (114) and the liquid outlet (141) being connected to an external cooling device to realize a circulating flow of the coolant inside the shell (11).

8. The submerged energy storage battery box according to any one of claims 1 to 7, characterized in that: The housing (11) further comprises a housing frame (111) for reinforcing the strength of the housing (11).

9. The submerged energy storage battery box according to claim 1, characterized in that: The battery pack (12) further comprises an end plate (123) and a bracket (124); the end plate (123) and the first guide plate (122) are mechanically connected to the battery pack frame (13) via the bracket (124) to achieve installation and fixation of the battery (121) and the first guide plate (122).

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