A spray type battery module upper cover

Abstract

The utility model relates to a spray type battery module upper cover, it includes the upper cover main part made of insulating material, a plurality of flow guide holes are set up on the upper cover main part, the position of every flow guide hole corresponds with the tab welding point of battery module aluminum bar. The utility model has the effect that prevents the cooling liquid from straying, realizes the balanced heat dissipation of aluminum bar tab welding point and guarantees the insulation and prevents short circuit effect.

Description

Technical Field

[0001] This utility model relates to the field of battery liquid cooling technology, and in particular to a spray-type battery module cover. Background Technology

[0002] As the core energy storage unit in energy storage systems and new energy vehicles, battery modules rely on aluminum bars as key components for current convergence between cells during operation. The welding points of the aluminum bars are prone to generating a large amount of heat due to the concentrated current. If the heat cannot be dissipated in time, it will lead to an increase in the temperature of the aluminum bars, performance degradation, and even the risk of thermal runaway. Therefore, a liquid cooling system is required to cool the aluminum bars. The top cover of the battery module, as the top protection and liquid cooling guide component of the module, has a structural design that directly determines the insulation protection effect and the cooling accuracy of the liquid cooling system. It is an important link to ensure the safe and stable operation of the battery module.

[0003] In existing technologies, battery modules using liquid cooling typically have an insulating cover on top, whose main function is to isolate electrical components to prevent short circuits. When the coolant passes through this cover, it often flows unguidedly to the surface of the battery module. Since the aluminum bar tab welding points are the core heat source with extremely high heat flux density, the disordered flow of the liquid cannot accurately dissipate heat from this critical area, resulting in significant temperature differences inside the module, low thermal management efficiency, and uncertainty. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a spray-type battery module cover that prevents coolant from flowing around, achieves balanced heat dissipation at the aluminum bar tab welding points, and ensures insulation and short-circuit protection.

[0005] The above-mentioned utility model objective is achieved through the following technical solution:

[0006] A spray-type battery module cover includes a cover body made of insulating material, and the cover body has multiple flow guide holes.

[0007] The position of each of the aforementioned flow guide holes corresponds to the tab welding area of ​​the battery module aluminum bar.

[0008] Through the above technical solution, the main body of the top cover is made of insulating material, which can avoid direct contact between electrical components and metal during transportation or installation, and achieve insulation protection; at the same time, multiple guide holes correspond to the electrode tab welding area of ​​the battery module aluminum bar, which can accurately guide the liquid into the key heat-generating area of ​​the aluminum bar, effectively prevent the uncertainty of heat generation caused by liquid erratic movement, and improve the stability of cooling effect.

[0009] As a further technical solution of this utility model: the inlet end of the guide hole is provided with an arc transition part.

[0010] Through the above technical solution, the arc transition part at the inlet end of the guide hole can reduce the resistance when the liquid flows in, avoid the liquid from forming turbulence or stagnation at the inlet, and make the liquid flow more smoothly to the electrode tab welding point of the aluminum bar, further optimizing the liquid guiding effect, while reducing the wear of the orifice caused by long-term scouring and extending the service life of the top cover.

[0011] As a further technical solution of this utility model: the tab welding area of ​​each of the battery module aluminum bars includes two tab welding points, and the two flow guide holes correspond to the two tab welding points respectively.

[0012] The above technical solution provides an independent and precise cooling channel for each tab welding point on a single aluminum bar, ensuring that the welding points on both sides of the aluminum bar can obtain an equal amount of coolant, achieving balanced heat dissipation, avoiding the problem of uneven cooling caused by single-hole coverage, ensuring uniform heat dissipation of the aluminum bar as a whole, and further reducing the risk of thermal runaway.

[0013] As a further technical solution of this utility model: the lower surface of the upper cover body is provided with multiple buckles for mounting the upper cover body on the battery module.

[0014] Through the above technical solution, the snap-fit ​​structure enables rapid and accurate positioning and installation between the top cover and the battery module, ensuring that the relative position of the guide hole and the aluminum bar welding point always maintains the design accuracy, while avoiding the short circuit risk that may be caused by using metal connectors and meeting the insulation requirements.

[0015] In summary, this utility model has at least one of the following beneficial technical effects:

[0016] 1. This utility model discloses a spray-type battery module cover, which achieves insulation protection of the battery module 5 and precise guidance of coolant to the core heating area of ​​the aluminum bar through the design of guide holes that align the insulating cover body with the electrode welding point. This eliminates the uncertainty of heat distribution caused by liquid turbulence and lays the foundation for precise heat dissipation of the liquid cooling system.

[0017] 2. This utility model discloses a spray-type battery module cover, which reduces liquid flow resistance and improves cooling efficiency through the arc transition part of the guide hole. The double guide hole corresponds to the aluminum bar bipolar tab welding point to achieve balanced heat dissipation and avoid local overheating. The snap-fit ​​structure ensures the precise assembly of the cover and the module to stabilize the cooling accuracy. The three elements work together to enhance the overall stability and reliability of the liquid cooling system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a spray-type battery module cover according to Embodiment 1 of the present invention.

[0019] Figure 2This is a front view of one embodiment of a spray-type battery module cover according to the present invention.

[0020] Figure 3 This is a side view of one embodiment of a spray-type battery module cover according to the present invention.

[0021] Figure 4 This is a cross-sectional view of a first embodiment of a spray-type battery module cover according to the present invention.

[0022] Figure 5 for Figure 4 An enlarged schematic diagram of part A in the middle.

[0023] Figure 6 This is a schematic diagram of the structure of the spray-type battery module cover and the battery module assembly of this utility model.

[0024] Reference numerals: 1. Main body of the top cover; 2. Air guide hole; 21. Arc transition part; 3. Battery module aluminum bar; 4. Buckle; 5. Battery module. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] Example 1:

[0029] Reference Figure 1 and Figure 2 This utility model discloses a spray-type battery module cover, comprising a cover body 1 made of insulating material. The cover body 1 serves as the basic support structure for the cover, physically isolating electrical components from metal parts during transportation or installation. Its insulating properties prevent direct contact and short circuit risks, achieving reliable insulation protection. It also has twenty-six drainage holes 2. (Refer to...) Figure 6 Each guide hole 2 is precisely aligned with the tab welding area of ​​the battery module aluminum bar 3, which can guide the coolant to the tab welding point where the heat is most concentrated in the battery module aluminum bar 3, eliminating the uncertainty of heat dissipation caused by liquid overflow.

[0030] To further optimize the flow performance of the coolant, refer to Figure 4 and Figure 5 An arc transition section 21 is provided at the inlet end of the guide hole 2. The arc transition section 21 adopts a smooth arc surface design. Compared with the existing right-angle inlet structure, it can significantly reduce the local resistance when the coolant flows in, avoid the formation of eddies or stagnation of liquid at the inlet, and allow the coolant to flow more smoothly through the guide hole 2 to the electrode tab welding point of the battery module aluminum bar 3. At the same time, it reduces the friction loss between the liquid and the edge of the hole, reduces the wear of the hole caused by long-term scouring, and extends the overall service life of the upper cover body 1.

[0031] Each battery module aluminum bar 3 typically has two tab welding points in its tab welding area, which are connected to the positive and negative tabs of the battery cell, respectively. The design uses two guide holes 2 corresponding to the two tab welding points on each battery module aluminum bar 3, and an independent cooling channel is built for each tab welding point. This ensures that the two core heat-generating points receive an equal and uniform amount of coolant, ensuring heat dissipation uniformity and achieving a balanced temperature distribution of the battery module aluminum bar 3 as a whole, further reducing the risk of thermal runaway caused by local overheating.

[0032] In addition, to achieve precise positioning and convenient installation of the top cover, refer to Figure 3 and Figure 4 The lower surface of the main body 1 of the upper cover is provided with multiple buckles 4, which are distributed around the perimeter and the middle area of ​​the lower surface, forming a cooperative assembly structure of peripheral fastening and central positioning. The buckles 4 adopt a structural design that is compatible with the assembly interface of the battery acquisition tray installed on the battery module 5, ensuring compatibility and stability during assembly. (Refer to...) Figure 6Through the elastic locking action of the clip 4 and the battery acquisition tray, the top cover body 1 can be quickly and accurately positioned and installed on the battery module 5, with one battery module 5 corresponding to one top cover. This eliminates the need for metal connectors, avoiding the short-circuit hazards associated with metal parts and ensuring that the relative position of the guide hole 2 and the welding point of the battery module's aluminum tab 3 maintains design precision, preventing cooling path misalignment due to assembly deviations. This installation method, combined with the insulation design of the top cover body 1 and the precise guidance of the guide hole 2, comprehensively guarantees the insulation safety and liquid cooling reliability of the battery module 5.

[0033] The working process of a spray-type battery module cover according to this utility model is as follows:

[0034] After the liquid cooling system is started, the coolant flows into the guide hole 2 through the surface of the upper cover body 1. Under the drag reduction effect of the arc transition part 21 at the inlet end of the guide hole 2, it smoothly passes through the guide hole 2 and is accurately sprayed onto the surface of the electrode tab welding point of the battery module aluminum bar 3 (two welding points of a single battery module aluminum bar 3 correspond to two guide holes 2 to achieve balanced liquid supply). Throughout the process, the buckle 4 maintains the relative fixation of the upper cover body 1 and the battery module 5, ensuring the alignment accuracy of the guide hole 2 and the welding point. At the same time, the insulation characteristics of the upper cover body 1 isolate the risk of electrical short circuit.

[0035] The implementation principle of this utility model is as follows: The main body 1 of the upper cover is made of insulating material, which, by virtue of its non-conductive physical properties, blocks the conductive path between electrical components and metal parts, thereby avoiding the risk of short circuits from the root and achieving reliable insulation protection; for the electrode tab welding points of the battery module aluminum bar 3 (the core heat-generating area caused by current concentration), the guide hole 2 is precisely aligned with it, so that the coolant flows directly to the heat source, reducing ineffective flow to avoid uneven heat distribution, and the two electrode tab welding points of a single battery module aluminum bar 3 correspond to two guide holes 2 respectively, providing an equal amount of coolant to each welding point through independent channels, ensuring the overall temperature uniformity of the battery module aluminum bar 3; the arc at the inlet end of the guide hole 2 Watanabe 21 utilizes an arc structure to reduce local resistance when coolant flows in, preventing turbulence or stagnation of the liquid. It also reduces wear on the orifice due to long-term scouring, improving flow efficiency and component lifespan. The buckle 4, relying on a snap-fit ​​structure adapted to the battery module 5, enables quick positioning and installation of the top cover body 1. This eliminates the need for metal connectors to eliminate short-circuit hazards and fixes the relative position of the top cover body 1 and the battery module 5, ensuring the alignment accuracy of the guide hole 2 and the welding point of the battery module aluminum bar 3 tab. The functional mechanisms of each feature support insulation, heat dissipation, and assembly requirements, working together to form a synergistic effect, comprehensively ensuring the operational safety and liquid cooling reliability of the battery module 5.

[0036] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A spray-type battery module cover, characterized in that, It includes an upper cover body (1) made of insulating material, and the upper cover body (1) has a plurality of flow guide holes (2); The position of each of the flow guide holes (2) corresponds to the electrode tab welding area of ​​the battery module aluminum bar (3).

2. The spray-type battery module cover according to claim 1, characterized in that, The inlet end of the guide hole (2) is provided with an arc transition part (21).

3. The spray-type battery module cover according to claim 1, characterized in that, Each of the battery module aluminum bars (3) has two tab welding points in its tab welding area, and the two flow guide holes (2) correspond to the two tab welding points respectively.

4. The spray-type battery module cover according to claim 1, characterized in that, The lower surface of the upper cover body (1) is provided with multiple buckles (4) for mounting the upper cover body (1) onto the battery module (5).

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