Box body and liquid cooling energy storage box

Abstract

The utility model belongs to the technical field of battery liquid cooling, and discloses a box body which comprises a box body main body, the box body main body is provided with an inner cavity, and the bottom of the inner cavity is provided with a runner groove structure; the runner groove structure comprises a liquid inlet groove, a plurality of main flow grooves communicated with the liquid inlet groove, and a plurality of branch flow grooves communicated with each main flow groove; a liquid inlet communicated with the liquid inlet groove and a liquid outlet far away from the liquid inlet are formed in one outer side of the box body. The utility model further discloses a liquid cooling energy storage box which comprises a box body, a battery module and a box cover, the battery module is detachably installed in the box body, and the box cover is installed on the top of the box body. The flow channel groove structure formed by communicating the liquid inlet groove, the main flow groove and the branch flow groove is arranged at the bottom of the box body, so that the battery module can be comprehensively, quickly and uniformly cooled, and the heat dissipation effect and the safety performance are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid-cooled batteries, in particular to a box body and a liquid-cooled energy storage box. Background Technique

[0002] Liquid cooling technology is an effective thermal management technology for energy storage batteries. By using a liquid (usually a specific coolant) as a medium for heat exchange, compared with air cooling technology, liquid cooling technology has better heat dissipation effect and can significantly improve the working efficiency and service life of energy storage batteries.

[0003] As a kind of liquid cooling technology, full-immersion liquid cooling can completely immerse energy storage batteries in an insulating, non-toxic and heat-dissipating liquid, and take away the heat generated by the energy storage batteries through the liquid, so as to achieve thermal management. At the same time, full-immersion liquid cooling can also play a role in fire protection and prevent the occurrence of fires in energy storage power stations.

[0004] However, most of the full-immersion liquid cooling boxes on the market are liquid cooling boxes with a non-channel structure. The coolant only circulates at the front end and the top surface of the liquid cooling box, and it is impossible to achieve comprehensive and uniform heat dissipation for energy storage batteries. The heat dissipation effect of the liquid cooling box needs to be further improved. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a box body and a liquid-cooled energy storage box, aiming to solve the technical problem that the existing full-immersion liquid cooling box cannot achieve comprehensive and uniform heat dissipation for energy storage batteries.

[0006] To achieve the above purpose, the utility model provides a box body, including a box body main body, the box body main body has an inner cavity, and a flow channel groove structure is arranged at the bottom of the inner cavity; the flow channel groove structure includes a liquid inlet groove, a plurality of main flow grooves communicated with the liquid inlet groove, and a plurality of branch flow grooves communicated with each main flow groove; a liquid inlet is arranged on one side of the box body main body and communicated with the liquid inlet groove, and a liquid outlet is arranged far away from the liquid inlet.

[0007] Preferably, the box body further includes a liquid inlet cover plate, and the liquid inlet cover plate is installed above the liquid inlet groove.

[0008] Preferably, the plurality of main flow grooves include a first main flow groove and a second main flow groove; the liquid inlet groove has a first communication port and a second communication port, the first communication port is communicated with the first main flow groove, and the second communication port is communicated with the second main flow groove.

[0009] Preferably, the plurality of branch flow grooves include a first branch flow groove, a second branch flow groove and a third branch flow groove. The two ends of the first main flow groove are respectively communicated with the first branch flow groove and the second branch flow groove, and the two ends of the second main flow groove are respectively communicated with the second branch flow groove and the third branch flow groove.

[0010] Preferably, support blocks are installed in both the first diversion groove and the third diversion groove.

[0011] In addition, to achieve the above object, the present utility model further provides a liquid-cooled energy storage box, which includes the box body, battery module and box cover described in any one of the above; the battery module is detachably installed in the box body, and the box cover is installed on the top of the box body.

[0012] Preferably, the liquid-cooled energy storage box further includes a reinforcing frame, and the reinforcing frame is installed at the bottom of the box body.

[0013] Preferably, the liquid-cooled energy storage box further includes a control board and a control board cover plate. The control board is installed on one side of the box body, and the control board cover plate covers the control board.

[0014] Preferably, a connection through hole is provided on the box body, and a data cable connector is installed in the connection through hole.

[0015] Preferably, a coolant input connector is installed in the liquid inlet.

[0016] In the box body and the liquid-cooled energy storage box of the present utility model, a flow channel groove structure formed by connecting an inlet groove, a main flow groove and a diversion groove is provided at the bottom of the inner cavity of the box body. During the use of the box body, the coolant is pumped into the inlet groove of the flow channel groove structure from the liquid inlet on one side of the box body main body, and is first diverted through a plurality of main flow grooves. After the first diversion, a part of the coolant is secondarily diverted through a plurality of diversion grooves to form a cooling circuit at the bottom of the box body, and the other part overflows to the top surface of the battery module between two adjacent batteries, then flows from the top surface to both sides, and then flows out through the liquid outlet to form a large circulation circuit, so as to comprehensively, quickly and uniformly cool down the battery module installed in the box body, improving the heat dissipation effect and safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Structural schematic diagram of the box body in an embodiment of the present utility model Figure 1 ;

[0019] Figure 2 Structural schematic diagram of the box body in an embodiment of the present utility model Figure 2 ;

[0020] Figure 3 Structural schematic of the box body in an embodiment of the present utility model Figure 3 ;

[0021] Figure 4 Structural schematic of the liquid-cooled energy storage box in another embodiment of the present utility model

[0022] Figure 5 in Figure 4 Explosion schematic of the liquid-cooled energy storage box in

[0023] The serial numbers in the figure are as follows:

[0024] 1. Box body main body; 2. Inner cavity; 3. Liquid inlet groove; 4. Main flow groove; 41. First main flow groove; 42. Second main flow groove; 5. Shunt groove; 51. First shunt groove; 52. Second shunt groove; 53. Third shunt groove; 6. Liquid inlet; 7. Liquid outlet; 8. Support block; 9. Positioning hole; 10. Liquid inlet cover plate; 110. Box body; 120. Battery module; 130. Box cover; 140. Reinforcing frame; 150. Control board; 160. Control board cover; 170. Connection through hole; 180. Data cable connector; 190. Coolant input connector. Specific implementation manners

[0025] In order to better understand the above technical solutions, the exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0026] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] It should be noted that in the embodiments of the present utility model, the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the coordinate system shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or part referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0028] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two parts or the interaction relationship between two parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The present utility model provides a box body for an energy storage battery. Referring to Figures 1 to 3 , in one embodiment, the box body includes a box body main body 1, the box body main body 1 has an inner cavity 2, and a flow channel groove structure is provided at the bottom of the inner cavity 2; the flow channel groove structure includes an inlet liquid groove 3, a plurality of main flow grooves 4 communicated with the inlet liquid groove 3, and a plurality of branch flow grooves 5 communicated with each of the main flow grooves 4; an inlet liquid port 6 communicated with the inlet liquid groove 3 and an outlet liquid port 7 away from the inlet liquid port 6 are provided on one side of the box body main body 1.

[0031] In this embodiment, the box body mainly includes a box body main body 1, an inner cavity 2, a flow channel groove structure composed of an inlet liquid groove 3, main flow grooves 4 and branch flow grooves 5, an inlet liquid port 6 and an outlet liquid port 7. Among them, the inlet liquid port 6 is arranged on one side surface of the box body main body 1 for injecting a specific coolant. Preferably, the specific coolant is a silicone oil-like liquid; the outlet liquid port 7 is arranged on the same side as the inlet liquid port 6 and may be located at a corner of the box body main body 1; for the flow channel groove structure, its inlet liquid groove 3, main flow grooves 4 and branch flow grooves 5 are communicated in sequence to form a plurality of cooling circuits (refer to the arrow directions in Figure 1 ), and a convex part for installing a battery block (refer to the dotted line in Figure 1 ) is formed in the middle of each cooling circuit. At this time, for a battery module composed of a plurality of battery blocks, each battery block in the battery module corresponds to a cooling circuit.

[0032] Preferably, the box body main body 1 may include a bottom plate and four side plates, and the four side plates are connected end to end to form a rectangular frame. The bottom plate is provided with a flow channel groove structure that is recessed inward, and a convex portion is provided around the periphery of the flow channel groove structure. At the same time, on the back of the bottom plate, corresponding to the convex portion on the front, a concave portion is provided, and a first reinforcing rib and a second reinforcing rib perpendicular to each other are provided in the concave portion. The four side plates are respectively a front side plate, a rear side plate, a left side plate, and a right side plate. The liquid inlet 6 is located at the bottom of the front side plate, and the liquid outlet 7 is located above the corner where the front side plate intersects with the left side plate, and is higher than the top surface of the battery module.

[0033] It can be understood that the specific process of cooling the battery module by the box body in this embodiment is as follows: After installing the battery module into the inner cavity 2 of the box body, a specific coolant is input into the liquid inlet groove 3 through the liquid inlet 6, and then a primary shunt is performed through the main flow channel 4. After the primary shunt, a part of the coolant is secondarily shunted through the shunt channel 5 to form multiple cooling circuits, and the other part overflows to the top between adjacent battery blocks, and then converges with the cooling circuits through the gap between the battery module and the side wall of the inner cavity 2 to form a large circulation circuit, thereby realizing comprehensive and rapid cooling of the battery module, significantly improving the heat dissipation effect and safety performance.

[0034] As a preferred embodiment, referring to Figure 1 , the box body further includes a liquid inlet cover plate 10, and the liquid inlet cover plate 10 is installed above the liquid inlet groove 3.

[0035] Specifically, the box body of this embodiment further includes a liquid inlet cover plate 10, and the liquid inlet cover plate 10 is fixedly installed directly above the liquid inlet groove 3 by screws to form a sealed liquid inlet passage with the liquid inlet groove 3, which can improve the stability of the coolant flow direction and ensure the shunt effect of the liquid inlet groove 3.

[0036] As a preferred embodiment, referring to Figure 1 , the several main flow channels 4 include a first main flow channel 41 and a second main flow channel 42; the liquid inlet groove 3 has a first communication port and a second communication port, the first communication port is communicated with the first main flow channel 41, and the second communication port is communicated with the second main flow channel 42.

[0037] In this embodiment, a liquid inlet 6 is provided on one side of the liquid inlet groove 3, and a first communication port and a second communication port with the same size are spaced on the other side. The several main flow channels 4 include a first main flow channel 41 communicated with the first communication port and a second main flow channel 42 communicated with the second communication port. At this time, the liquid inlet groove 3 can evenly shunt the coolant injected from the liquid inlet 6 to the first main flow channel 41 and the second main flow channel 42 through the two communication ports, and further ensure that the coolant flow rates in each cooling circuit are the same, which is beneficial to uniformly dissipating heat from the battery module.

[0038] As a preferred embodiment, referring to Figure 1 , the several flow dividing grooves 5 include a first flow dividing groove 51, a second flow dividing groove 52 and a third flow dividing groove 53. Both ends of the first main flow groove 41 are communicated with the first flow dividing groove 51 and the second flow dividing groove 52 respectively, and both ends of the second main flow groove 42 are communicated with the second flow dividing groove 52 and the third flow dividing groove 53 respectively.

[0039] In this embodiment, the flow dividing grooves 5 include a first flow dividing groove 51, a second flow dividing groove 52 and a third flow dividing groove 53 which are connected unidirectionally, and the first flow dividing groove 51, the second flow dividing groove 52 and the third flow dividing groove 53 are all bent flow grooves. At this time, the outlet end of each main flow groove 4 is communicated with the inlet ends of the flow dividing grooves 5 on both sides to re-divide the coolant in the main flow groove 4 to form four cooling circuits to ensure the same heat dissipation effect on each battery block in the battery module.

[0040] As a preferred embodiment, referring to Figure 1 , support blocks 8 are installed in both the first flow dividing groove 51 and the third flow dividing groove 53.

[0041] Specifically, in the box body of this embodiment, a plurality of support blocks 8 are uniformly arranged on one side close to the side wall of the inner cavity 2 in the first flow dividing groove 51 and the third flow dividing groove 53. The height of the support blocks 8 is the same as that of the convex part to stably install the battery module at the bottom of the inner cavity 2. Optionally, the number of the support blocks 8 is set according to requirements. For example, the number of the support blocks 8 is four.

[0042] As a preferred embodiment, referring to Figure 1 , positioning holes 9 are provided at the bottom of the inner cavity 2.

[0043] Specifically, in the box body of this embodiment, a convex part is provided at the bottom of the inner cavity 2 around the periphery of the flow channel groove structure, and a plurality of groups of positioning holes 9 are provided along the liquid inlet direction on the convex part. The number of groups of the positioning holes 9 is set according to the number of battery blocks included in the battery module, and each battery block in the battery module corresponds to a group of positioning holes 9 to ensure the accurate installation of the battery module. Optionally, the number and position of each group of positioning holes 9 are set according to requirements. For example, when the number of each group of positioning holes 9 is two or four, each group of positioning holes 9 is symmetrically arranged along the middle line of the middle convex part.

[0044] In addition, the present utility model also provides a liquid-cooled energy storage box. Referring to Figure 4 and Figure 5 , in another embodiment, the liquid-cooled energy storage box includes the box body 110, the battery module 120 and the box cover 130 in any of the above embodiments; the battery module 120 is detachably installed in the box body 110, and the box cover .......

[0045] The coolant flow path of the liquid-cooled energy storage box is as follows: The coolant flows into the inlet tank 3 of the flow channel groove structure from the inlet 6, and then flows into the inlet tank 3 and the main flow channel 4 respectively, forming a cooling circuit at the bottom of the box body 110. At the same time, the coolant in the cooling circuit overflows from the gaps between the battery blocks of the battery module 120 to the top surface of the battery module 120, then flows from the top surface to both sides, and then flows out through the outlet 7, forming a large circulation circuit.

[0046] In this embodiment, the liquid-cooled energy storage box mainly includes a box body 110, a box cover 130 covering the box body 110, and a battery module 120 installed at the bottom of the box body 110. Among them, the bottom of the battery module 120 is detachably installed in the inner cavity 2 of the box body 110 through a positioning pin and is located above the flow channel groove structure.

[0047] During the use of the liquid-cooled energy storage box, the coolant is pumped into the inlet tank 3 of the flow channel groove structure from the inlet 6, and is first divided through several main flow channels 4. Most of the coolant after the first division is secondarily divided through several diversion channels 5 to form a cooling circuit at the bottom of the box body 110. A small part overflows to the top surface of the battery module 120 through the gaps (i.e., the gaps between blocks) between two adjacent battery blocks in the battery module 120, and then flows back to the bottom cooling circuit through the side wall of the box body 110, forming a large circulation circuit of the coolant, so as to comprehensively, quickly and evenly cool down the battery module 120 in the liquid-cooled energy storage box, improving the heat dissipation effect and safety performance.

[0048] As a preferred embodiment, the liquid-cooled energy storage box further includes a reinforcing frame 140, and the reinforcing frame 140 is installed at the bottom of the box body 110.

[0049] In this embodiment, the liquid-cooled energy storage box further includes a reinforcing frame 140, and the reinforcing frame 140 is attached to the bottom plate of the box body 110 to support and reinforce the box body 110.

[0050] Further, the reinforcing frame 140 may include an outer frame, support beams are installed inside the outer frame, and handles are installed on the sides of the outer frame.

[0051] It can be understood that in order to avoid affecting battery heat dissipation, the support beams of the reinforcing frame 140 are installed at the front and rear ends of the outer frame and are perpendicular to the installation direction of the battery module 120. For the convenience of installation and transportation, the handles of the reinforcing frame 140 are installed on the front and rear side plates of the reinforcing frame 140.

[0052] As a preferred embodiment, the liquid-cooled energy storage box further includes a control board 150 and a control board cover 160. The control board 150 is installed on one side of the box body 110, and the control board cover 160 covers the control board 150.

[0053] Specifically, the liquid-cooled energy storage box of this embodiment further includes a control board 150 and a control board cover 160. Among them, the control board 150 is detachably installed on the box body 110. The control board 150 is mainly used to manage and monitor the states of each battery block to ensure the safe, stable, and efficient operation of the battery module 120. The control board cover 160 covers the control board 150 and is fixed by screws to protect the control board 150. Optionally, the control board 150 is a battery management system.

[0054] Furthermore, a storage groove for installing the control board 150 can be provided on the box body 110. The storage groove is located above the liquid inlet 6. At this time, the control board 150 is on the same side as the liquid inlet 6, which is convenient for the installation of parts of the liquid-cooled energy storage box and the overall transportation.

[0055] As a preferred embodiment, a connection through hole 170 is opened on the box body 110, and a data cable connector 180 is installed in the connection through hole 170.

[0056] In this embodiment, for the convenience of wiring, a plurality of connection through holes 170 are provided on one side of the box body 110 where the control board 150 is installed. A data cable connector 180 is installed in the connection through hole 170 for connecting the control board 150 to each electronic component in the liquid-cooled energy storage box. The electronic component can be a battery block or a sensor for monitoring parameters such as the temperature, voltage, and current of the battery block.

[0057] Furthermore, the plurality of connection through holes 170 include a first connection through hole and a second connection through hole located diagonally below the first connection through hole. Among them, the first connection through hole is used for connecting the positive and negative electrodes of the control board 150 to each battery block, and the second connection through hole is used for connecting the control board 150 to each sensor. By setting the first connection through hole and the second connection through hole, connection lines with different uses can be distinguished, which is convenient for subsequent maintenance.

[0058] As a preferred embodiment, a coolant input joint 190 is installed in the liquid inlet 6.

[0059] It can be understood that for the liquid-cooled energy storage box of this embodiment, the external coolant is quickly pumped into the liquid inlet groove 3 through the coolant input joint 190, and at the same time, the airtightness of the liquid-cooled energy storage box can be ensured.

[0060] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A box body, comprising a box body main body, characterized in that, The box body has an inner cavity, and a flow channel groove structure is provided at the bottom of the inner cavity; the flow channel groove structure includes a liquid inlet groove, a plurality of main flow channels communicated with the liquid inlet groove, and a plurality of sub-flow channels communicated with each of the main flow channels; a liquid inlet port communicated with the liquid inlet groove and a liquid outlet port far from the liquid inlet port are provided on one side of the box body.

2. The box according to claim 1, characterized in that, The box body further includes a liquid inlet cover plate, and the liquid inlet cover plate is installed above the liquid inlet groove.

3. The box according to claim 1 or 2, characterized in that, The plurality of main flow channels include a first main flow channel and a second main flow channel; the liquid inlet groove has a first communication port and a second communication port, the first communication port is communicated with the first main flow channel, and the second communication port is communicated with the second main flow channel.

4. The box according to claim 3, wherein The plurality of sub-flow channels include a first sub-flow channel, a second sub-flow channel and a third sub-flow channel. The two ends of the first main flow channel are respectively communicated with the first sub-flow channel and the second sub-flow channel, and the two ends of the second main flow channel are respectively communicated with the second sub-flow channel and the third sub-flow channel.

5. The casing according to claim 4, characterized in that, Support blocks are installed in both the first sub-flow channel and the third sub-flow channel.

6. A liquid-cooled energy storage box, characterized in that, It includes a box body, a battery module and a box cover as described in any one of claims 1-5; the battery module is detachably installed in the box body, and the box cover is installed on the top of the box body.

7. The liquid-cooled energy storage box according to claim 6, characterized in that, The liquid-cooled energy storage box further includes a strengthening frame, and the strengthening frame is installed at the bottom of the box body.

8. The liquid-cooled energy storage box according to claim 7, wherein, The liquid-cooled energy storage box further includes a control board and a control board cover plate. The control board is installed on one side of the box body, and the control board cover plate covers the control board.

9. The liquid-cooled energy storage box according to claim 8, wherein, Connection through holes are formed in the box body, and data cable connectors are installed in the connection through holes.

10. The liquid-cooled energy storage box according to claim 9, wherein A coolant input connector is installed in the liquid inlet port.

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