Structure of liquid-cooled energy storage battery pack

Abstract

The utility model discloses a structure of liquid -cooled energy storage battery pack, including base, be provided with the mounting groove on the base upper surface, liquid cooling mechanism, liquid cooling mechanism is fixedly installed on the base upper surface through bolt, liquid cooling mechanism is by bottom plate and top plate upper and lower stack combination constitutes, and two groups adjacent turbulence groove staggered arrangement, the top plate upper surface left and right sides are provided with cooling liquid import and cooling liquid export respectively, cooling liquid import and cooling liquid export are linked with each other with cooling liquid chamber left and right sides respectively, through setting up a plurality of flow channel in the bottom plate, and the width of a plurality of flow channel gradually becomes smaller from both sides to the middle part, make liquid cooling mechanism can even radiate heat, through setting up a plurality of turbulence groove in the flow channel, produce turbulence to the cooling liquid in the flow channel through turbulence groove, break the laminar boundary layer through turbulence, improve heat transfer efficiency greatly, improve the cooling heat dissipation efficiency of cooling liquid under the prerequisite of not improving equipment energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of liquid-cooled energy storage battery pack technology, and in particular to a structure of a liquid-cooled energy storage battery pack. Background Technology

[0002] Traditional liquid cooling relies on the coolant flow rate and flow channel structure; the higher the flow rate and the larger the heat exchange area, the stronger the heat dissipation efficiency. However, the structure of energy storage battery packs is fixed, and the module size, flow channel layout, and pipeline parameters cannot be adjusted after leaving the factory. The only way to improve heat dissipation efficiency is to "increase the coolant flow rate," which requires increasing the pump power to overcome the structural bottleneck.

[0003] This approach has several drawbacks: First, the energy consumption of the pump increases dramatically, and the energy consumption of the liquid cooling system can easily exceed 8%, weakening the cost advantage per kilowatt-hour. Second, once the flow rate exceeds 2.5 m / s, the fluid impact force increases dramatically, leading to a higher risk of seal failure, and the pump noise exceeds 75 decibels, requiring additional sound insulation costs. Third, the fixed flow channel results in uneven distribution of coolant, affecting consistency and shortening the replacement cycle.

[0004] Therefore, this application provides a structure for a liquid-cooled energy storage battery pack. Utility Model Content

[0005] This invention provides a structure for a liquid-cooled energy storage battery pack, which can solve the problem that traditional liquid-cooled energy storage battery packs rely solely on increasing pump power and coolant flow rate to optimize heat dissipation efficiency.

[0006] This utility model provides a structure for a liquid-cooled energy storage battery pack, including:

[0007] A base, wherein a mounting groove is provided on the upper surface of the base;

[0008] The liquid cooling mechanism is fixedly installed on the upper surface of the base by bolts. The liquid cooling mechanism is composed of a bottom plate and a top plate stacked on top of each other. The upper surface of the bottom plate is provided with a coolant cavity. The coolant cavity is integrally provided with multiple parallel protrusions. The flow channels between two adjacent protrusions form a flow channel for coolant flow. The width of the multiple flow channels gradually decreases from both sides to the middle. The multiple flow channels are uniformly provided with turbulence grooves, and two sets of adjacent turbulence grooves are staggered. The upper surface of the top plate is provided with a coolant inlet and a coolant outlet on the left and right sides respectively. The coolant inlet and coolant outlet are respectively connected to the left and right sides of the coolant cavity.

[0009] A battery pack mechanism is fixedly installed on the upper surface of the base, and the lower wall of the battery in the battery pack mechanism is in contact with the upper surface of the top plate.

[0010] The outer casing is fixedly mounted to the upper surface of the base by bolts, and the liquid cooling mechanism and the battery pack mechanism are both located between the base and the outer casing.

[0011] In the structure of a liquid-cooled energy storage battery pack according to one embodiment of the present invention, connection terminals are fixedly installed on both the left and right sides of the upper surface of the top plate.

[0012] In a liquid-cooled energy storage battery pack according to an embodiment of the present invention, a lower groove is provided at the center of the upper surface of the top plate, and multiple equidistantly distributed thermal pads are fixedly installed inside the lower groove.

[0013] In a liquid-cooled energy storage battery pack according to an embodiment of the present invention, the battery pack mechanism includes a fixing frame fixedly installed on the upper surface of the base, and multiple unit batteries are fixedly installed inside the fixing frame by bolts. Multiple connecting rods are welded on both sides of the fixing frame.

[0014] In a liquid-cooled energy storage battery pack according to an embodiment of the present invention, a control panel is integrated on one side of the outer wall of the outer casing, and the control panel is electrically connected to multiple unit batteries.

[0015] In a liquid-cooled energy storage battery pack according to an embodiment of the present invention, the left and right sides of the coolant cavity are both "triangular" structures, and the apex of the two "triangle" structures are respectively coaxially arranged with the coolant inlet and the coolant outlet.

[0016] In one embodiment of the present invention, an explosion-proof valve is fixedly installed on one side of the outer casing.

[0017] The technical solution provided in this application embodiment may include the following beneficial effects: This application designs a structure for a liquid-cooled energy storage battery pack.

[0018] 1. By adapting the heat distribution through the "wide on both sides and narrow in the middle" flow channel, and combining it with the staggered turbulence grooves to enhance heat transfer, the heat dissipation efficiency can be improved without increasing the pump power;

[0019] 2. The triangular inlet and outlet ensures uniform distribution of coolant, and the turbulence groove eliminates local dead zones, reducing the temperature difference within the battery module to within 5°C and improving battery consistency.

[0020] 3. The sealed structure prevents leakage, the explosion-proof valve relieves pressure, and the control panel provides real-time monitoring, providing multiple protections to avoid the risk of thermal runaway and short circuit;

[0021] 4. The multiple fixing designs of the mounting bracket, connecting rod, and housing ensure that the system remains stable during transportation and under vibration conditions, thus extending its service life.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0025] Figure 2 This is an exploded view of an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the base plate in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the top plate structure in an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the battery pack mechanism in an embodiment of this application. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] Example

[0033] like Figures 1 to 5 As shown, this application provides a structure for a liquid-cooled energy storage battery pack, comprising:

[0034] The base 10 has an installation groove 11 on its upper surface. The liquid cooling mechanism 20 is placed in the installation groove 11 to ensure that the relative position of the liquid cooling mechanism 20 and the base 10 is stable.

[0035] The liquid cooling mechanism 20 is fixedly installed on the upper surface of the mounting groove 11 by bolts. The liquid cooling mechanism 20 is composed of a bottom plate 21 and a top plate 22 stacked on top of each other. The upper surface of the bottom plate 21 is provided with a coolant cavity 23. The coolant cavity 23 is integrally provided with multiple parallel protrusions 24. The flow channel 25 for the flow of coolant is formed between two adjacent protrusions 24. The width of the multiple flow channels 25 gradually decreases from the sides to the middle. The multiple flow channels 25 are uniformly provided with turbulence grooves 26, and two sets of adjacent turbulence grooves 26 are staggered. The left and right sides of the upper surface of the top plate 22 are respectively provided with coolant inlets 27 and coolant outlets 28, which are connected to the left and right sides of the coolant cavity 23.

[0036] With the above technical solution, the coolant enters the left side of the coolant chamber 23 through the coolant inlet 27, and then flows through each flow channel 25. Since the width of the multiple flow channels 25 gradually decreases from the sides to the center, the heat generation of the battery pack is not uniformly distributed. The central region is often the concentrated area of ​​the core heat-generating components, with a higher heat density, easily leading to localized high temperatures. The edge regions have lower heat density, but longer heat dissipation paths and are farther from the cold source. If the flow rate is insufficient, the edge temperature may be too high. The problem of long heat dissipation paths in the edge regions is solved by using wide flow channels with high flow rates on both sides, avoiding heat accumulation at the edges. Narrow flow channels with high flow rates enhance the heat exchange efficiency of the high-heat-generating area in the center, suppressing localized high temperatures. The liquid cooling mechanism 20 can uniformly cool the battery pack, ultimately reducing the overall temperature difference and improving temperature uniformity. By setting multiple turbulence grooves 26 inside the flow channel 25, when the coolant flows through the wall turning point of the "leading edge" groove inlet of the turbulence groove 26, the coolant will temporarily detach from the wall due to the sudden concavity of the wall, forming a "separated flow". Subsequently, the coolant re-adhere to the wall inside the turbulence groove 26. This process directly tears the laminar boundary layer near the wall, allowing the high-speed mainstream fluid to directly contact the wall, greatly improving the heat transfer efficiency. The cooling and heat dissipation efficiency of the coolant is improved without increasing the energy consumption of the equipment.

[0037] In one optional embodiment, connection terminals 29 are fixedly installed on both the left and right sides of the upper surface of the top plate 22. Multiple batteries in the battery pack mechanism 30 are connected in series to the connection terminals 29. Since the connection terminals 29 are close to the top plate of the liquid cooling mechanism 20, they can quickly conduct the heat generated by the contact resistance, avoiding conductive failures caused by overheating of the terminals.

[0038] In one optional embodiment, the coolant chamber 23 has a triangular structure on both the left and right sides, and the apex of the two triangular structures is coaxially arranged with the coolant inlet 27 and the coolant outlet 28, respectively. The coolant enters the narrow opening of the triangular structure from the coolant inlet 27 and is guided to diffuse along both sides of the triangular structure. This avoids the fluid directly impacting the flow channel wall and forming eddies, allowing the coolant to uniformly fill the flow channel cross section and eliminating local "insufficient flow" areas. The outlet triangle narrows on both sides, which can smoothly collect the fluid in the flow channel, reduce the disturbance when fluids from different areas meet, ensure the stability of the overall flow field, and lay the foundation for uniform heat dissipation of the battery module.

[0039] In an optional embodiment, a lower groove 210 is provided at the center of the upper surface of the top plate 22. Multiple equidistantly distributed thermal pads 211 are fixedly installed inside the lower groove 210. The thermal pads 211 are sandwiched between the top plate 22 and the battery pack, filling the tiny gaps between the two contact surfaces, greatly reducing contact thermal resistance and improving heat conduction efficiency.

[0040] The battery pack mechanism 30 is fixedly installed on the upper surface of the base 10, and the lower wall of the battery in the battery pack mechanism 30 is in contact with the upper surface of the top plate 22. The battery pack mechanism 30 includes a fixing frame 31 fixedly installed on the upper surface of the base 10. Multiple unit batteries 32 are fixedly installed inside the fixing frame 31 by bolts. Multiple connecting rods 33 are welded on both sides of the fixing frame 31. The fixing frame 31 is fixedly installed on the upper surface of the base 10 by the connecting rods 33, thereby fixing the battery pack mechanism 30 so that the battery pack mechanism 30 is always in contact with the upper surface of the liquid cooling mechanism 20.

[0041] The outer casing 40 is fixedly installed on the upper surface of the base 10 by bolts. The liquid cooling mechanism 20 and the battery pack mechanism 30 are both located on the base 10 and the outer casing 40. The outer casing 40 completely covers the liquid cooling mechanism 20 and the battery pack mechanism 30 (providing dustproof, waterproof and impact-resistant protection), and the inner wall of the outer casing 40 can be lined with heat insulation cotton to reduce the influence of the external environment on the battery temperature.

[0042] In one optional embodiment, a control panel is integrated on one side of the outer wall of the housing 40, and the control panel is electrically connected to multiple unit batteries 32. The control panel can display the voltage, temperature and remaining power of the unit batteries in real time.

[0043] In one optional embodiment, an explosion-proof valve 41 is fixedly installed on one side of the housing 40. By setting the explosion-proof valve 41, when the energy storage battery pack experiences thermal runaway such as overcharging, short circuit, or high temperature, a violent chemical reaction will occur, generating a large amount of high-temperature gas and accompanied by a sudden increase in pressure. The explosion-proof valve 41 is used to release pressure from the energy storage battery pack to prevent the energy storage battery pack from exploding.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A structure for a liquid-cooled energy storage battery pack, characterized in that, include: A base, wherein a mounting groove is provided on the upper surface of the base; The liquid cooling mechanism is fixedly installed on the upper surface of the base by bolts. The liquid cooling mechanism is composed of a bottom plate and a top plate stacked on top of each other. The upper surface of the bottom plate is provided with a coolant cavity. The coolant cavity is integrally provided with multiple parallel protrusions. The flow channels between two adjacent protrusions form a flow channel for coolant flow. The width of the multiple flow channels gradually decreases from both sides to the middle. The multiple flow channels are uniformly provided with turbulence grooves, and two sets of adjacent turbulence grooves are staggered. The upper surface of the top plate is provided with a coolant inlet and a coolant outlet on the left and right sides respectively. The coolant inlet and coolant outlet are respectively connected to the left and right sides of the coolant cavity. A battery pack mechanism is fixedly installed on the upper surface of the base, and the lower wall of the battery in the battery pack mechanism is in contact with the upper surface of the top plate. The outer casing is fixedly mounted to the upper surface of the base by bolts, and the liquid cooling mechanism and the battery pack mechanism are both located between the base and the outer casing.

2. The structure of a liquid-cooled energy storage battery pack according to claim 1, wherein Connection terminals are fixedly installed on both the left and right sides of the upper surface of the top plate.

3. The structure of a liquid-cooled energy storage battery pack according to claim 1, wherein A lower groove is provided at the center of the upper surface of the top plate, and multiple equidistantly distributed heat-conducting pads are fixedly installed inside the lower groove.

4. The structure of a liquid-cooled energy storage battery pack according to claim 1, wherein The battery pack mechanism includes a fixed frame that is fixedly installed on the upper surface of the base. Multiple unit batteries are fixedly installed inside the fixed frame by bolts. Multiple connecting rods are welded to both sides of the fixed frame.

5. The structure of a liquid-cooled energy storage battery pack according to claim 4, wherein A control panel is integrated on one side of the outer wall of the housing, and the control panel is electrically connected to multiple unit batteries.

6. The structure of a liquid-cooled energy storage battery pack according to claim 1, wherein The coolant chamber has a triangular structure on both the left and right sides, and the apex of the two triangular structures is coaxially arranged with the coolant inlet and coolant outlet, respectively.

7. The structure of a liquid-cooled energy storage battery pack according to claim 1, wherein An explosion-proof valve is fixedly installed on one side of the outer casing.

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