Energy storage lower box body and energy storage cabinet

Abstract

The invention belongs to the technical field of energy storage devices, and particularly relates to an energy storage lower box body and an energy storage cabinet, the energy storage lower box body comprises a tray, a heat conduction bent pipe and a current collector, the tray is divided into an assembly area and an extension area which are adjacently arranged, and the assembly area can be in sealed butt joint with an energy storage upper box body; a containing groove is formed in the surface, facing the upper energy storage box body, of the assembling area, and openings extending to the extending area are formed in the two ends of the containing groove correspondingly. The heat conduction bent pipe is used for circulating a cooling medium, and the heat conduction bent pipe is uniformly wound around the assembly area and located in the containing groove; the current collector is arranged in the extension area, and the two ends of the heat conduction bent pipe are communicated with the current collector through the openings to form a circulation loop of the cooling medium. Compared with a traditional lower energy storage box body, the lower energy storage box body has the advantages that on the premise that the lower energy storage box body has waterproof performance and heat dissipation performance, the number of components is reduced, the assembling efficiency can be improved, the total weight of the lower energy storage box body can be reduced, and therefore the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and in particular to an energy storage lower box and an energy storage cabinet. Background Art

[0002] The energy storage cabinet is a device for storing electrical energy or other energy sources. Specifically, the energy storage box includes an upper energy storage box and a lower energy storage box. The lower energy storage box and the upper energy storage box can be sealed and docked to form an energy storage space for placing battery modules, and the lower energy storage box is used to dissipate heat from the battery modules.

[0003] The traditional energy storage lower box consists of a liquid cooling plate, left and right side frames, front and rear frames, several liquid cooling plate supporting longitudinal beams, and several reinforcing cross beams. This solution has the following shortcomings:

[0004] 1. There are too many parts in the lower box frame, and the accumulated errors of the parts are too many, resulting in large assembly size errors, high defect rate and low production efficiency;

[0005] 2. The overall weight of the existing lower box solution is too large, which will increase product costs.

[0006] Therefore, the above problems need to be solved urgently. Summary of the invention

[0007] The object of the present invention is to provide an energy storage lower box and an energy storage cabinet to improve the production efficiency of the energy storage lower box and also to reduce the production cost.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] An energy storage lower box, comprising:

[0010] The tray is divided into an assembly area and an extension area which are arranged adjacent to each other, wherein the assembly area can be sealed and docked with the energy storage upper box body, a receiving groove is arranged on the surface of the assembly area facing the energy storage upper box body, and both ends of the receiving groove are provided with openings extending to the extension area;

[0011] A heat-conducting curved pipe, used for circulating cooling medium, the heat-conducting curved pipe is evenly coiled in the assembly area and is located in the containing groove;

[0012] The current collector is arranged in the extension area, and both ends of the heat conduction bent pipe are respectively connected with the current collector through the openings to form a circulation loop of the cooling medium.

[0013] Preferably, the energy storage lower box further comprises a plurality of reinforcing ribs arranged inside the heat-conducting bent pipe, the length direction of the plurality of reinforcing ribs is consistent with the extension direction of the heat-conducting bent pipe, and the plurality of reinforcing ribs are arranged at intervals along the width direction of the heat-conducting bent pipe.

[0014] Preferably, the energy storage lower box body further comprises a sealing portion, and the sealing portion is arranged at the opening to seal the gap between the thermally conductive bend pipe and the opening and between the thermally conductive bend pipe and the energy storage upper box body.

[0015] Preferably, a plurality of grooves for accommodating the sealing portion are arranged on the extension area, and the plurality of grooves are arranged in one-to-one correspondence with the openings.

[0016] Preferably, the accommodating grooves are provided in plurality, and the heat conducting bent pipes are provided in plurality, and the plurality of heat conducting bent pipes are provided in one-to-one correspondence with the plurality of accommodating grooves;

[0017] Both ends of the plurality of thermally conductive curved pipes are connected to the same current collector.

[0018] Preferably, a water inlet and a water outlet are provided on the current collector, the water inlet is connected to one end of the thermal bending pipe, and the water outlet is connected to the other end of the thermal bending pipe;

[0019] The water inlet and the water outlet are both connected to an external liquid supply device.

[0020] Preferably, the energy storage lower box further comprises a plurality of downward pressure beams, which are arranged in the assembly area and are used to limit the thermal bending pipe from being separated from the accommodating groove.

[0021] Preferably, an annular protrusion is provided on the edge of the assembly area, the annular protrusion can be docked with the energy storage upper box body, and a sealing ring is provided between the annular protrusion and the energy storage upper box body.

[0022] Preferably, the accommodating groove is made by stamping.

[0023] An energy storage device, comprising:

[0024] Energy storage upper box;

[0025] As in the above-mentioned energy storage lower box, the assembly area of ​​the energy storage lower box is sealed and assembled with the energy storage upper box to form a receiving space;

[0026] The battery module is used for storing and releasing electric energy. The battery module is arranged in the accommodation space and placed on the tray.

[0027] Beneficial effects of the present invention:

[0028] The energy storage lower box in the present invention seals and docks the assembly area of ​​the tray with the energy storage upper box, which can ensure the waterproof performance of the energy storage cabinet. The heat conduction bent pipe is arranged in the accommodating groove. Under the action of the heat conduction bent pipe and the cooling medium, the heat dissipation performance of the energy storage lower box can be ensured. Compared with the traditional energy storage lower box, the energy storage lower box proposed in the present invention has fewer components while having waterproof and heat dissipation performances, which can not only improve the assembly efficiency, but also reduce the overall weight of the energy storage lower box, thereby reducing the production cost.

[0029] The energy storage cabinet of the present invention has waterproof and heat dissipation properties, and the number of overall components is reduced, which can not only improve assembly efficiency, but also reduce the overall weight of the energy storage lower box, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the energy storage lower box in an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of a tray in an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the structure of the heat transfer elbow and the sealing part in the embodiment of the present invention;

[0033] Figure 4 Schematic diagram of the structure of the heat conducting bent pipe and the current collector in an embodiment of the present invention;

[0034] Figure 5 4 is a cross-sectional view of a heat-conducting bent pipe in an embodiment of the present invention.

[0035] In the figure:

[0036] 1. tray; 11. assembly area; 12. extension area; 13. receiving groove; 131. opening; 14. groove; 15. annular protrusion;

[0037] 2. Heat conduction bending pipe; 21. Reinforcement ribs;

[0038] 3. Current collector; 4. Sealing part; 5. Water inlet nozzle; 6. Water outlet nozzle; 7. Down pressure beam; 8. Sealing ring. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] See also Figures 1 to 5 In this embodiment, an energy storage lower box is proposed, which includes a tray 1, a heat-conducting bent pipe 2 and a current collector 3. The tray 1 is divided into an assembly area 11 and an extension area 12 that are adjacently arranged. The assembly area 11 can be sealed and docked with the energy storage upper box. The surface of the assembly area 11 facing the energy storage upper box is provided with a receiving groove 13, and both ends of the receiving groove 13 are provided with openings 131 extending to the extension area 12; the heat-conducting bent pipe 2 is used to circulate the cooling medium, and the heat-conducting bent pipe 2 is evenly coiled in the assembly area 11 and is located in the receiving groove 13; the current collector 3 is arranged in the extension area 12, and both ends of the heat-conducting bent pipe 2 are respectively connected with the current collector 3 through the openings 131 to form a circulation loop of the cooling medium.

[0044] It can be understood that the sealing connection between the assembly area 11 of the tray 1 and the upper energy storage box can ensure the waterproof performance of the energy storage cabinet, and the heat conduction elbow 2 is arranged in the accommodating groove 13. Under the action of the heat conduction elbow 2 and the cooling medium, the heat dissipation performance of the lower energy storage box can be ensured. Compared with the traditional lower energy storage box, the lower energy storage box proposed in this embodiment has fewer components while having waterproof and heat dissipation performances, which can not only improve the assembly efficiency, but also reduce the overall weight of the lower energy storage box, thereby reducing the production cost.

[0045] In addition, the tray 1 can provide flatness for the lower energy storage box to facilitate the placement of the battery module, and the accommodating groove 13 is made by stamping to further reduce the overall weight of the lower energy storage box and ensure sufficient strength.

[0046] In order to enhance the heat dissipation performance of the energy storage lower box, the thickness of the heat-conducting bend 2 is consistent with the groove depth of the receiving groove 13, so that the heat-conducting bend 2 can abut against the battery module, thereby increasing the contact area between the heat-conducting bend 2 and the battery module, thereby improving the heat dissipation performance of the energy storage lower box. In addition, the battery module abuts against the tray 1 and the heat-conducting bend 2 at the same time, thereby increasing the bearing capacity of the heat-conducting bend 2. Compared with the traditional energy storage lower box, the welding strength of the liquid cooling plate is increased by welding the reinforcing crossbeam to the liquid cooling plate. In this embodiment, the bearing area between the battery assembly and the heat-conducting bend 2 is increased to increase the bearing capacity of the heat-conducting bend 2, which can further improve the assembly efficiency of the entire energy storage lower box. Moreover, compared with the method of increasing the bearing capacity of the heat-conducting bend 2 by welding, in this embodiment, when assembling the heat-conducting bend 2, damage to the heat-conducting bend 2 can also be avoided, wherein the heat-conducting bend 2 is preferably arranged in the receiving groove 13 by glue bonding.

[0047] In addition, the energy storage lower box also includes a plurality of lower pressure beams 7, which are arranged in the assembly area 11 and are used to limit the separation of the heat conduction bend 2 and the receiving groove 13. It can be understood that the lower pressure beams 7 and the tray 1 can clamp the heat conduction bend 2, thereby preventing the heat conduction bend 2 from separating from the receiving groove 13, thereby ensuring the safety performance of the energy storage lower box.

[0048] Exemplarily, a plurality of rivet holes are provided on the tray 1, and the lower pressure beam 7 is fixed to the tray 1 by means of M6 waterproof rivet nuts. This arrangement facilitates the assembly of the lower pressure beam 7 and also facilitates the adjustment of the position of the lower pressure beam 7 to adapt to different types of battery modules.

[0049] Furthermore, the energy storage lower box also includes a plurality of reinforcing ribs 21 disposed inside the heat-conducting curved pipe 2, the length direction of the plurality of reinforcing ribs 21 is consistent with the extension direction of the heat-conducting curved pipe 2, and the plurality of reinforcing ribs 21 are disposed at intervals along the width direction of the heat-conducting curved pipe 2. It can be understood that the reinforcing ribs 21 are vertically disposed inside the heat-conducting pipe to further increase the bearing capacity of the heat-conducting curved pipe 2.

[0050] In particular, a plurality of reinforcing ribs 21 are arranged inside the heat conducting bend 2, so that the inside of the heat conducting bend 2 can be divided into a plurality of cooling channels. Such arrangement can increase the flow area of ​​the cooling medium and improve the flow speed of the fluid, thereby enhancing the heat exchange effect and improving the cooling efficiency.

[0051] Preferably, the number of the reinforcing ribs 21 is four. Of course, in some other feasible embodiments, the number of the reinforcing ribs 21 may be other, which is not specifically limited here.

[0052] In this embodiment, when both ends of the heat-conducting bent pipe 2 are connected to the current collector 3 through the openings 131 respectively, the heat-conducting bent pipe 2 can extend from the inside of the energy storage cabinet to the outside of the energy storage cabinet and be connected to the liquid supply device to form a circulation loop of the cooling medium, thereby easily affecting the waterproofness of the energy storage cabinet.

[0053] Therefore, the energy storage lower box also includes a sealing portion 4, which is arranged at the opening 131 to seal the gap between the thermal bending pipe 2 and the opening 131 and between the thermal bending pipe 2 and the energy storage upper box. Such an arrangement can ensure the sealing inside the energy storage cabinet, thereby ensuring the waterproof performance of the energy storage cabinet.

[0054] Among them, the sealing part 4 is preferably a sealing structural adhesive. Such a configuration can ensure that the gaps between the thermal bending pipe 2 and the opening 131 and between the bending pipe and the energy storage upper box are fully sealed, and can further improve the assembly efficiency of the thermal bending pipe 2.

[0055] Furthermore, a plurality of grooves 14 for accommodating the sealing portion 4 are provided on the extension area 12, and the plurality of grooves 14 are provided in one-to-one correspondence with the opening 131. In practical applications, before assembling the heat-conducting elbow 2, it is necessary to first fill the groove 14 with sealing structural glue. The sealing structural glue solidifies in the bowl-shaped structure, which can prevent the sealing structural glue from flowing or shifting during use, ensuring that it always remains in the gap that needs to be sealed. The provision of the groove 14 helps the sealing structural glue to remain stable during thermal expansion, reducing the probability of sealing failure caused by temperature changes, so as to improve the sealing performance of the sealing structural glue. In addition, the groove 14 can increase the contact surface between the sealing structural glue and the accommodating groove 13, thereby increasing the contact area between the sealing structural glue and the tray 1, so as to further improve the sealing performance of the sealing structural glue.

[0056] In particular, the shape of the groove 14 is preferably bowl-shaped. The bowl-shaped groove 14 can evenly distribute the stress on the sealant, thereby reducing local stress concentration and further reducing the risk of sealing failure.

[0057] In addition, an annular protrusion 15 is provided at the edge of the assembly area 11, and the annular protrusion 15 can be connected with the energy storage upper box, and a sealing ring 8 is provided between the annular protrusion 15 and the energy storage upper box. It can be understood that the height of the protrusion is higher than the extension area 12, so that the penetration of the connecting part between the energy storage lower box and the energy storage upper box due to the accumulation of rainwater in the extension area 12 can be avoided, thereby further improving the waterproof performance of the energy storage cabinet.

[0058] In this embodiment, a water inlet 5 and a water outlet 6 are provided on the current collector 3, the water inlet 5 is connected to one end of the heat-conducting curved tube 2, and the water outlet 6 is connected to the other end of the heat-conducting curved tube 2; the water inlet 5 and the water outlet 6 are both connected to an external liquid supply device. It can be understood that after one end of the heat-conducting curved tube 2 is connected to the water inlet of the current collector 3, the other end enters the assembly area 11 through the opening 131, and the assembly area 11 surrounds it, and then communicates with the water outlet 6 through another opening 131 to ensure the circulation of the cooling medium, thereby ensuring the heat dissipation performance of the lower box of the energy storage.

[0059] The cooling medium is preferably water. Of course, in some other feasible embodiments, the cooling medium may also be other products, which will not be elaborated here.

[0060] In this embodiment, a plurality of accommodating grooves 13 are provided, and a plurality of heat-conducting bent pipes 2 are provided, and the plurality of heat-conducting bent pipes 2 are provided in a one-to-one correspondence with the plurality of accommodating grooves 13; it can be understood that a plurality of heat-conducting bent pipes 2 are provided in the assembly area 11, thereby further improving the uniformity of heat dissipation of the lower box of the energy storage device to ensure the heat dissipation performance of the heat dissipation cabinet.

[0061] Exemplarily, there are preferably two receiving grooves 13 and two heat-conducting curved pipes 2, and the two receiving grooves 13 and the heat-conducting curved pipes 2 are symmetrically arranged in the assembly area 11 to further ensure uniformity of heat dissipation.

[0062] In addition, both ends of the plurality of heat-conducting curved tubes 2 are connected to the same current collector 3. This arrangement can further reduce the composition of the lower box of the energy storage, thereby further reducing the production cost.

[0063] Exemplarily, both ends of the heat conducting bend 2 are connected to the current collector 3 by welding to prevent the heat conducting bend 2 from being separated from the current collector 3, thereby extending the service life of the lower energy storage box.

[0064] In summary, compared with the traditional energy storage lower box in which the various components are assembled by stamping and welding, which easily leads to insufficient cleanliness of the energy storage lower box, in this embodiment, the cooling medium is transported by the heat conduction elbow 2, so that the cooling medium can be isolated from the tray 1, thereby avoiding metal chips, solder residues, etc. generated during the stamping or welding process from contaminating the cooling medium, thereby avoiding the use of special cleaning agents and processes, thereby further improving the assembly efficiency of the energy storage lower box and reducing production costs.

[0065] This embodiment also provides an energy storage device, which includes an energy storage upper box, a battery module and the energy storage lower box as described above, wherein the assembly area 11 of the energy storage lower box is sealed and assembled with the energy storage upper box to form a receiving space; the battery module is arranged in the receiving space and placed on the tray 1. It can be understood that, under the premise of having waterproof performance and heat dissipation performance, the overall component parts are reduced, which can not only improve the assembly efficiency, but also reduce the overall weight of the energy storage lower box, thereby reducing the production cost.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An energy storage lower box, characterized in that: include: A tray (1) is divided into an assembly area (11) and an extension area (12) which are arranged adjacent to each other, the assembly area (11) being capable of sealingly docking with an energy storage upper box body, a receiving groove (13) being arranged on a surface of the assembly area (11) facing the energy storage upper box body, and both ends of the receiving groove (13) being arranged with openings (131) extending to the extension area (12); A heat-conducting curved pipe (2) for circulating a cooling medium, wherein the heat-conducting curved pipe (2) is evenly coiled in the assembly area (11) and is located in the receiving groove (13); A current collector (3) is arranged in the extension area (12), and both ends of the heat-conducting curved pipe (2) are respectively connected to the current collector (3) through the openings (131) to form a circulation loop of the cooling medium.

2. The energy storage lower box according to claim 1, characterized in that: The energy storage lower box body further comprises a plurality of reinforcing ribs (21) arranged inside the heat-conducting curved tube (2); the length direction of the plurality of reinforcing ribs (21) is consistent with the extension direction of the heat-conducting curved tube (2), and the plurality of reinforcing ribs (21) are arranged at intervals along the width direction of the heat-conducting curved tube (2).

3. The energy storage lower box according to claim 1, characterized in that: The energy storage lower box body further comprises a sealing portion (4), wherein the sealing portion (4) is arranged at the opening (131) to seal the gap between the heat conduction curved pipe (2) and the opening (131), and to seal the gap between the heat conduction curved pipe (2) and the energy storage upper box body.

4. The energy storage lower box according to claim 3 is characterized in that: A plurality of grooves (14) for accommodating the sealing portion (4) are arranged on the extension area (12), and the plurality of grooves (14) and the plurality of openings (131) are arranged in a one-to-one correspondence.

5. The energy storage lower box according to claim 1, characterized in that: A plurality of the containing grooves (13) are provided, and a plurality of the heat-conducting bent pipes (2) are provided, and the plurality of the heat-conducting bent pipes (2) and the plurality of the containing grooves (13) are provided in a one-to-one correspondence; Both ends of the plurality of heat-conducting curved pipes (2) are connected to the same current collector (3).

6. The energy storage lower box according to claim 1 or 5, characterized in that: The current collector (3) is provided with a water inlet nozzle (5) and a water outlet nozzle (6), the water inlet nozzle (5) is connected to one end of the heat conduction curved pipe (2), and the water outlet nozzle (6) is connected to the other end of the heat conduction curved pipe (2); The water inlet nozzle (5) and the water outlet nozzle (6) are both connected to an external liquid supply device.

7. The energy storage lower box according to claim 1, characterized in that: The energy storage lower box body also includes a plurality of downward pressure beams (7), which are arranged in the assembly area (11) and are used to limit the thermal bending pipe (2) from being separated from the accommodating groove (13).

8. The energy storage lower box according to claim 1, characterized in that: An annular protrusion (15) is provided at the edge of the assembly area (11), the annular protrusion (15) can be butted against the energy storage upper box body, and a sealing ring (8) is provided between the annular protrusion (15) and the energy storage upper box body.

9. The energy storage lower box according to claim 1, characterized in that: The accommodating groove (13) is made by stamping.

10. An energy storage cabinet, characterized in that: include: Energy storage upper box; The energy storage lower box according to any one of claims 1 to 9, wherein the assembly area (11) of the energy storage lower box is sealed and assembled with the energy storage upper box to form an energy storage space; A battery module is used for storing and releasing electric energy; the battery module is arranged in the energy storage space and placed on the tray (1).

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