A liquid cold plate

Abstract

This application relates to heat dissipation and discloses a liquid cooling plate for cooling a battery module. It has a flow channel and an injection port and an outlet connected to the flow channel, with refrigerant injected into the flow channel. The flow channel includes: an inlet end of a supply flow channel connected to the injection port; a main flow channel including at least two heat dissipation flow channels, each connected to the outlet end of the supply flow channel; and a confluence flow channel whose inlet end is connected to the outlet end of the heat dissipation flow channel, and whose outlet end is connected to the outlet, so that the refrigerant in the heat dissipation flow channel is discharged from the outlet through the confluence flow channel. Each heat dissipation flow channel can be connected to the outlet through one confluence flow channel; or, every two heat dissipation flow channels can be connected to the outlet through one confluence flow channel, and when two heat dissipation flow channels are connected to the outlet through one confluence flow channel, the two heat dissipation flow channels are located on opposite sides of the inlet end of the confluence flow channel. This ensures that the refrigerant is evenly distributed within the flow channel, avoiding uneven heat dissipation and improving uniformity.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology, and more particularly to a liquid cooling plate. Background Technology

[0002] Temperature is a crucial factor affecting battery performance and lifespan. During charging and discharging, battery modules inevitably generate heat. Therefore, in the battery industry, liquid cooling plates are typically installed within the battery module to improve heat dissipation efficiency. A battery module usually contains multiple cell groups, each composed of multiple cells. Existing liquid cooling plates do not provide uniform temperature control for the cell groups. The liquid cooling plate flow channels generally adopt a serpentine, single-inlet-single-outlet design. This type of flow channel has no branching from beginning to end. During the flow of the liquid in the cooling plate, the inlet temperature is low, while the outlet temperature is high, resulting in a large temperature difference between the inlet and outlet liquids. This leads to a large temperature difference in the heat source (cells). Furthermore, this design results in high flow resistance when the external dimensions (area) of the liquid cooling plate are large. A branched structure design can easily lead to inconsistent flow velocities in the branched channels, with some areas having fast flow velocities and others slow flow velocities, resulting in poor overall temperature uniformity. Utility Model Content

[0003] One object of this application is to provide a liquid cooling plate that at least solves the above-mentioned problems.

[0004] To achieve the above objectives, some embodiments of this application provide a liquid cooling plate for cooling a battery module, which is constructed with a flow channel and a liquid injection port and a liquid outlet connected to the flow channel, and the flow channel is filled with refrigerant; the flow channel includes a supply flow channel, a main flow channel and a confluence flow channel.

[0005] The supply channel has an inlet end connected to the injection port.

[0006] The main flow channel includes at least two heat dissipation flow channels, each connected to the outlet end of the supply flow channel; the inlet end of the confluence flow channel is connected to the outlet end of the heat dissipation flow channel.

[0007] The manifold has its outlet end connected to the liquid outlet so that the refrigerant in the heat dissipation channel can be discharged from the liquid outlet through the manifold.

[0008] Each heat dissipation channel can be connected to the liquid outlet through a confluence channel; or, two heat dissipation channels can be connected to the liquid outlet through a confluence channel, and when two heat dissipation channels are connected to the liquid outlet through a confluence channel, the two heat dissipation channels are respectively located on both sides of the inflow end of the confluence channel.

[0009] Compared with related technologies, the solution provided in this application divides the flow channel into a hierarchical structure of supply flow channel, main flow channel (heat dissipation flow channel) and confluence flow channel, forming an orderly flow path of "diversion-heat dissipation-convergence". This ensures that the refrigerant is evenly distributed in the flow channel and avoids the problem of uneven heat dissipation caused by the disordered path in traditional single flow channels. At the same time, the connection method between the heat dissipation flow channel and the confluence flow channel is clearly defined (one or two heat dissipation flow channels correspond to one confluence flow channel). Through symmetrical layout design, the refrigerant flow of different branches can be balanced, improving the uniformity of battery module cooling. Attached Figure Description

[0010] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0011] Figure 1 This is a schematic diagram of the flow channel of the liquid cooling plate provided in the embodiments of this disclosure;

[0012] Figure 2 This is a schematic diagram of the flow channel of the liquid cooling plate from another perspective, provided in an embodiment of this disclosure;

[0013] Figure 3 This is a schematic diagram of the flow channel of another structure of the liquid cooling plate provided in this embodiment of the present disclosure;

[0014] Figure 4 This is a schematic diagram of the flow channel of the liquid cooling plate from another perspective, provided in an embodiment of this disclosure;

[0015] Figure 5 This is a schematic diagram of the flow channel of another structure of the liquid cooling plate provided in this embodiment of the present disclosure;

[0016] Figure 6 This is a schematic diagram of the flow channel of the liquid cooling plate from another perspective, provided in an embodiment of this disclosure;

[0017] Figure 7 This is a schematic diagram of the structure of the liquid cooling plate provided in the embodiments of this disclosure.

[0018] Figure label:

[0019] 10: Liquid cooling plate; 101: Injection port; 102: Outlet port; 20: Supply channel; 30: Main channel; 301: First heat dissipation channel; 302: Second heat dissipation channel; 303: Third heat dissipation channel; 304: Fourth heat dissipation channel; 305: First heat dissipation zone; 306: Second heat dissipation zone; 401: First confluence channel; 402: Second confluence channel; 403: Channel inlet section; 404: Channel flow section; 405: Channel outlet section. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0022] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0023] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0024] Unless otherwise stated, the term "multiple" means two or more.

[0025] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0026] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0028] Combination Figures 1 to 7 As shown in the embodiment of this disclosure, a liquid cooling plate is provided for cooling a battery module. It is constructed with a flow channel and a liquid injection port 101 and a liquid outlet 102 connected to the flow channel, and the flow channel is filled with refrigerant. The flow channel includes a supply flow channel 20, a main flow channel 30 and a confluence flow channel 40.

[0029] The inflow end of the supply channel 20 is connected to the liquid injection port 101; the main channel 30 includes at least two heat dissipation channels, each connected to the outflow end of the supply channel 20; the inflow end of the confluence channel 40 is connected to the outflow end of the heat dissipation channel, and the outflow end of the confluence channel is connected to the liquid outlet 102, so that the refrigerant of the heat dissipation channel is discharged from the liquid outlet 102 through the confluence channel; wherein, each heat dissipation channel can be connected to the liquid outlet 102 through a confluence channel; or, each pair of heat dissipation channels can be connected to the liquid outlet 102 through a confluence channel, and when two heat dissipation channels are connected to the liquid outlet 102 through a confluence channel, the two heat dissipation channels are respectively located on both sides of the inflow end of the confluence channel.

[0030] The liquid cooling plate 10 provided in this embodiment of the present disclosure forms an orderly flow path of "diversion-heat dissipation-convergence" by dividing the flow channel into a hierarchical structure of supply flow channel 20, main flow channel 30 (heat dissipation flow channel) and converging flow channel. This ensures that the refrigerant is evenly distributed in the flow channel and avoids the problem of uneven heat dissipation caused by the disordered path in traditional single flow channels. At the same time, the connection method between the heat dissipation flow channel and the converging flow channel is clearly defined (one or two heat dissipation flow channels correspond to one converging flow channel). Through the symmetrical layout design, the refrigerant flow of different branches can be balanced, thereby improving the uniformity of battery module cooling.

[0031] In this embodiment, the refrigerant enters through the injection port 101 and flows through the supply channel 20, where it is split within a short distance. This avoids the problem of uneven gas-liquid distribution at the split point caused by excessively long channel distances before the split, resulting in greater refrigerant vaporization. Reducing the width of the supply channel 20 decreases the heat exchange of the refrigerant within it, further preventing uneven gas-liquid distribution. Simultaneously, the reduced width of the supply channel 20 and the confluence channel lowers the heat exchange, concentrating more cooling energy in the main channel 30. This solves the problem of uneven cooling and large temperature differences in current battery module (energy storage battery) cooling systems for power lithium batteries.

[0032] The liquid cooling plate 10 provided in this embodiment can effectively solve the problems of poor cooling effect and uneven cooling of battery module (energy storage battery), and can also effectively improve the service life and safety performance of battery module (energy storage battery).

[0033] In some embodiments, the heat dissipation channels are arranged in a zigzag, bow-shaped, S-shaped, concave, or gui-shaped pattern.

[0034] Optionally, if the main flow channel 30 includes two heat dissipation channels, the two heat dissipation channels are distributed on both sides of the supply flow channel 20, or the two heat dissipation channels are located on the same side of the supply flow channel 20 and connected to the same confluence flow channel.

[0035] When the main flow channel 30 includes two heat dissipation channels, their design, in which they are distributed on both sides or on the same side of the supply flow channel 20 and connected to the same confluence flow channel, can adapt to the spatial layout requirements of different battery modules. If they are distributed on both sides, bidirectional uniform heat dissipation can be achieved through a symmetrical structure; if they are located on the same side and share a confluence flow channel, the flow channel structure can be simplified, the space occupied by the flow channel can be reduced, and the assembly compatibility between the liquid cooling plate 10 and the battery module can be improved.

[0036] For example, such as Figure 5 and Figure 6 As shown, in a main flow channel 30 comprising two heat dissipation channels, located on the same side of the supply flow channel 20 and connected to the same confluence flow channel, for ease of description and distinction, the two heat dissipation channels are defined as the first heat dissipation channel 301 and the second heat dissipation channel 302, and the confluence flow channel is the first confluence flow channel 401. The first heat dissipation channel 301 and the second heat dissipation channel 302 are two heat dissipation branches, connected to the liquid outlet 102 via the first confluence flow channel 401. The first heat dissipation channel 301 and the second heat dissipation channel 302 can be symmetrically arranged. The lengths of the first heat dissipation channel 301 and the second heat dissipation channel 302 are approximately the same to ensure that the refrigerant flows uniformly through the first heat dissipation channel 301 and the second heat dissipation channel 302, and the refrigerant flow paths of the two branches are essentially the same. This design improves the uneven cooling situation in the current battery module cooling process.

[0037] Similarly, such as Figure 3 and Figure 4 As shown, in a main flow channel 30 comprising two heat dissipation channels distributed on both sides of the supply flow channel 20, the two heat dissipation channels are defined as a first heat dissipation channel 301 and a third heat dissipation channel 303. The first heat dissipation channel 301 is connected to the liquid outlet 102 via a first confluence channel 401, and the third heat dissipation channel 303 is connected to the liquid outlet 102 via a second confluence channel 402. The first heat dissipation channel 301 and the third heat dissipation channel 303 are symmetrically arranged. The lengths of the first heat dissipation channel 301 and the third heat dissipation channel 303 are approximately the same to ensure that the refrigerant flows uniformly through the first heat dissipation channel 301 and the third heat dissipation channel 303, and the refrigerant flow paths of the two branches are basically the same. This design improves the uneven cooling situation in the current battery module cooling process.

[0038] Optionally, when the two heat dissipation channels are located on the same side of the supply channel 20, the two heat dissipation channels are located on opposite sides of the outlet end of the supply channel 20. That is, combined... Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the first heat dissipation channel 301 and the second heat dissipation channel 302 are respectively located on both sides of the outlet end of the supply channel 20. Similarly, the third heat dissipation channel 303 and the fourth heat dissipation channel 304 are respectively located on both sides of the outlet end of the supply channel 20.

[0039] With two heat dissipation channels located on the same side of the supply channel 20, the symmetrical flow distribution characteristic of the supply channel 20 outlet end can be utilized to ensure a more balanced flow distribution of the refrigerant when entering the two heat dissipation channels. This avoids excessive or insufficient local flow caused by concentrated inflow on one side, further improving the uniformity of heat dissipation. In addition, the combination of heat dissipation channels on both sides of the supply channel 20 outlet end ensures uniform heat dissipation on both sides of the supply channel 20, improving the uniformity of heat dissipation and cooling.

[0040] Furthermore, by symmetrically distributing two heat dissipation channels on the same side on both sides of the inflow end of the confluence channel, the geometric symmetry of the confluence channel ensures that the fluid path length from the two heat dissipation channels to the confluence channel is consistent and the flow resistance is balanced, avoiding the problem of refrigerant flow velocity differences or uneven flow caused by unilateral offset. This design allows the refrigerant from the two heat dissipation channels to converge synchronously during the confluence stage, reducing pressure fluctuations and stagnation during the confluence process, thereby ensuring the flow uniformity of each heat dissipation branch within the main flow channel 30, further improving the temperature consistency of the energy storage battery module cooling, and solving the problem of localized overheating caused by asymmetrical confluence.

[0041] Optionally, when the main flow channel 30 includes four heat dissipation channels, two heat dissipation channels are respectively provided on both sides of the supply flow channel 20, and the heat dissipation channels on both sides of the supply flow channel 20 are respectively connected to the liquid outlet 102 through a confluence flow channel. That is, combined with Figure 1 and Figure 2As shown, for ease of description and distinction, four heat dissipation channels are defined as the first heat dissipation channel 301, the second heat dissipation channel 302, the third heat dissipation channel 303, and the fourth heat dissipation channel 304, and a first confluence channel 401 connected to the first heat dissipation channel 301 and the second heat dissipation channel 302, and a second confluence channel 402 connected to the third heat dissipation channel 303 and the fourth heat dissipation channel 304. The first heat dissipation channel 301 and the third heat dissipation channel 303 are located on both sides of the supply channel 20, and similarly, the second heat dissipation channel 302 and the fourth heat dissipation channel 304 are located on both sides of the supply channel 20. Furthermore, the first heat dissipation channel 301 and the second heat dissipation channel 302 are located on both sides of the outlet end of the supply channel 20, and similarly, the third heat dissipation channel 303 and the fourth heat dissipation channel 304 are located on both sides of the outlet end of the supply channel 20.

[0042] When the main flow channel 30 includes four heat dissipation channels, two heat dissipation channels are respectively set on both sides of the supply flow channel 20. The two heat dissipation channels on the same side are connected to the liquid outlet 102 through a confluence flow channel, which can construct a symmetrical heat dissipation network of "one inlet, four branches, and two outlets". This design not only increases the heat dissipation area, but also reduces the flow interference between each heat dissipation channel by grouping and confluence, which is especially suitable for large-capacity battery modules and can significantly improve the overall heat dissipation efficiency and temperature uniformity.

[0043] The main flow channel 30 is designed with a symmetrical layout both vertically and horizontally, ensuring that the refrigerant flows evenly through different branches, and the coolant flow path is basically the same in different branches. This design improves the uneven cooling of the battery pack during the current cooling process.

[0044] Optionally, the liquid cooling plate 10 includes: a first heat dissipation area 305 having a heat dissipation channel; and a second heat dissipation area 306 having a heat dissipation channel; wherein the first heat dissipation area 305 and the second heat dissipation area 306 are symmetrically arranged, and / or, the length of the heat dissipation channel of the first heat dissipation area 305 is equal to the length of the heat dissipation channel of the second heat dissipation area 306.

[0045] By setting up a symmetrical first heat dissipation area 305 and a second heat dissipation area 306 (each containing a heat dissipation channel), the geometric characteristics of the symmetrical structure are utilized to ensure that the refrigerant flow rate, flow velocity and heat exchange path flowing through the two heat dissipation areas are completely consistent, thereby ensuring that the battery module in the corresponding area cools down at the same rate, effectively eliminating the temperature difference problem caused by the asymmetrical layout of the flow channels, and improving the stability of the cooling system.

[0046] Combination Figure 4 and Figure 6As shown, for example, the heat dissipation channel of the first heat dissipation area 305 can be the first heat dissipation channel 301, and the heat dissipation channel of the second heat dissipation area 306 can be the second heat dissipation channel 302. Alternatively, for example, the heat dissipation channel of the first heat dissipation area 305 can be the first heat dissipation channel 301, and the heat dissipation channel of the second heat dissipation area 306 can be the third heat dissipation channel 303.

[0047] Optionally, the heat dissipation channels of the first heat dissipation zone 305 and the heat dissipation channels of the second heat dissipation zone 306 are symmetrically arranged.

[0048] By clearly defining the symmetrical arrangement of the heat dissipation channels of the first heat dissipation zone 305 and the second heat dissipation zone 306, the fluid dynamic characteristics (such as pressure and flow velocity distribution) in the two channels can be guaranteed to be consistent from a structural perspective. This avoids uneven refrigerant distribution caused by differences in channel shape and further enhances the temperature uniformity of the left and right or upper and lower areas of the battery module.

[0049] Optionally, the liquid cooling plate 10 includes: a first heat dissipation area 305 having two heat dissipation channels; a second heat dissipation area 306 having two heat dissipation channels, and the second heat dissipation area 306 and the first heat dissipation area 305 being respectively located on both sides of the supply channel 20; wherein the first heat dissipation area 305 and the second heat dissipation area 306 are symmetrically arranged, and / or, the heat dissipation channels of the first heat dissipation area 305 and the heat dissipation channels of the second heat dissipation area 306 are symmetrically arranged.

[0050] When the first heat dissipation area 305 and the second heat dissipation area 306 are each provided with two heat dissipation channels and placed on both sides of the supply channel 20, a "four-channel heat dissipation network" is formed through the symmetrical layout, which can cover a larger area of ​​the battery module. At the same time, the heat exchange of each area is balanced by the grouped symmetrical design (two channels in each group), which is especially suitable for long strip or modular battery packs and can achieve gradient uniform heat dissipation from the center to both sides.

[0051] Combination Figure 2 As shown, for example, the heat dissipation channels of the first heat dissipation area 305 are the first heat dissipation channel 301 and the second heat dissipation channel 302, and the heat dissipation channels of the second heat dissipation area 306 can be the third heat dissipation channel 303 and the fourth heat dissipation channel 304.

[0052] Optionally, the two heat dissipation channels of the first heat dissipation area 305 / the second heat dissipation area 306 are symmetrically arranged, or the two heat dissipation channels of the first heat dissipation area 305 / the second heat dissipation area 306 are of equal length.

[0053] The symmetrical arrangement or equal length of two heat dissipation channels within the same heat dissipation area ensures consistent flow resistance and avoids "flow deviation" caused by differences in channel length or shape (i.e., some channels have high flow rates while others have low flow rates). This ensures consistent cooling performance for battery cells within the same heat dissipation area and reduces the risk of localized overheating.

[0054] For example, the first heat dissipation channel 301 and the third heat dissipation channel 303 are symmetrically arranged. The lengths of the first heat dissipation channel 301 and the third heat dissipation channel 303 are equal. Similarly, the second heat dissipation channel 302 and the fourth heat dissipation channel 304 are symmetrically arranged. The lengths of the second heat dissipation channel 302 and the fourth heat dissipation channel 304 are equal.

[0055] Optionally, the flow area of ​​the supply channel 20 is smaller than the flow area of ​​the main channel 30.

[0056] The flow area of ​​the supply channel 20 is smaller than that of the main channel 30, which can create a "widening effect" when the refrigerant flows into the main channel 30, reducing the flow rate and increasing the fluid distribution area. This allows the refrigerant to diffuse fully before entering the heat dissipation channel, avoiding the problems of concentrated flow rate and uneven flow distribution caused by the excessive width of the supply channel 20. At the same time, the flow restriction effect controls the initial heat exchange and prevents the refrigerant from vaporizing too early, which would affect the subsequent heat dissipation efficiency.

[0057] Optionally, the flow area of ​​the supply channel 20 is less than or equal to 60% of the flow area of ​​the main channel 30.

[0058] The flow area of ​​the supply channel 20 is limited to ≤ 60% of that of the main channel 30. By quantifying design parameters, a significant "contraction-expansion" channel structure is forced to form while ensuring sufficient flow. This ratio optimizes the fluid dynamics characteristics of the distribution stage, allowing the refrigerant to achieve the best diffusion angle and velocity distribution when entering the heat dissipation channel, further improving the uniformity of distribution and heat dissipation efficiency.

[0059] Optionally, the flow area of ​​the confluence channel is smaller than the flow area of ​​the main channel 30.

[0060] The flow area of ​​the manifold is smaller than that of the main flow channel 30, which can form a "constriction effect" after the refrigerant has completed heat dissipation, thereby increasing the flow rate and reducing the residence time in the manifold stage. This avoids refrigerant accumulation or backflow caused by the manifold being too wide. At the same time, by limiting the heat exchange in the manifold section, more cooling capacity is concentrated in the heat dissipation area of ​​the main flow channel 30, thereby improving the effective heat dissipation efficiency.

[0061] Optionally, the flow area of ​​the confluence channel is less than or equal to 50% of the flow area of ​​the main flow channel 30.

[0062] The flow area of ​​the manifold is limited to ≤50% of that of the main flow channel (30mm). A more stringent constriction design ensures rapid fluid discharge during the manifold stage, reducing energy loss. This ratio optimizes the pressure gradient in the manifold section, preventing refrigerant vaporization from being exacerbated by excessively low flow rates. Simultaneously, the structural design forces cooling capacity to concentrate in the heat dissipation channel, further improving the cooling uniformity of the battery module.

[0063] Optionally, the injection port 101 and the outlet port 102 are constructed on the same surface of the liquid cooling plate 10.

[0064] Placing the injection port 101 and the outlet 102 on the same plate simplifies the connection structure between the liquid cooling plate 10 and the external piping, reduces pipe bends and resistance, and lowers assembly complexity and leakage risk. Simultaneously, the centralized interface arrangement facilitates modular design, adapts to the spatial layout requirements of integrated battery packs, and improves system compactness. Figures 1 to 7 As shown.

[0065] Optionally, the injection port 101 and the outlet port 102 are constructed on the same surface of the liquid cooling plate 10 and are located near the same edge. Figures 1 to 7 As shown.

[0066] The liquid inlet 101 and liquid outlet 102 are located on the same plate and close to the same edge, which further optimizes the interface layout and allows external pipelines to be connected in the same direction, reducing pipeline crossing and space occupation. This is especially suitable for flat or compact battery modules, which can improve assembly efficiency and reduce the risk of cooling failure caused by pipeline interference.

[0067] Optionally, the injection port 101 and the outlet port 102 can be respectively constructed on two opposite surfaces of the liquid cooling plate 10.

[0068] The liquid inlet 101 and outlet 102 are allowed to be located on opposite sides of the plate, providing a flexible pipeline connection solution for special scenarios (such as stacked battery packs). This design allows for adjustment of the interface direction according to the space constraints of the battery module, enhancing the environmental adaptability of the liquid cooling plate 10 and avoiding assembly difficulties or excessively long pipeline detours caused by fixed interface positions.

[0069] Optionally, the injection port 101 and / or the outlet port 102 are circular.

[0070] The liquid inlet 101 and / or liquid outlet 102 adopt a circular structure, which takes advantage of the fluid dynamics of the circular cross section (such as low resistance and uniform flow) to reduce local pressure loss when the refrigerant enters and exits the flow channel and ensure stable flow. At the same time, the circular interface facilitates quick connection with standard pipelines (such as circular flexible hoses and rigid pipes), improving sealing reliability and assembly efficiency.

[0071] It should be noted that, for the shape of the injection port 101 and the outlet 102, those skilled in the art may choose other shapes according to specific needs, and no further limitations are made here.

[0072] Optionally, when the two heat dissipation channels are located on the same side of the supply channel 20, the two heat dissipation channels are respectively located on both sides of the inflow end of the confluence channel; wherein, the confluence channel includes: a confluence inflow section 403, a confluence flow section 404 and a confluence outflow section 405 connected in sequence. The confluence inflow section 403 is located between the two heat dissipation channels and can be arranged parallel to the adjacent heat dissipation channels. The confluence flow section 404 can extend to the outermost edge of the heat dissipation channel away from the injection port 101, and then bend and extend to the outlet port 102.

[0073] When the two heat dissipation channels are located on the same side of the supply channel 20, the three-section structure design of the confluence channel, namely the inflow section, the flow section, and the outflow section, allows the confluence inflow section 403 to be located between the two heat dissipation channels and set in parallel. This allows for symmetrical collection of refrigerant from both sides of the channel, avoiding flow deviation caused by confluence on one side. The flow section extends to the edge of the heat dissipation channel away from the injection port 101 and bends, which can extend the confluence path to balance the flow velocity and ensure that the refrigerant from the two heat dissipation channels flows synchronously, further improving the overall heat dissipation uniformity.

[0074] For example, the liquid cooling plate 10 can be made of aluminum. Those skilled in the art can choose other materials, such as copper or alloys, according to specific needs. No further limitations are made here.

[0075] For example, the refrigerant injected into the flow channel is R134a. However, those skilled in the art may choose other types of liquids and gases as needed, and no further limitations are made here.

[0076] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims, and the foregoing embodiments should be considered exemplary and non-limiting.

Claims

1. A liquid cooling plate for cooling a battery module, comprising a flow channel and an injection port and an outlet connected to the flow channel, wherein the flow channel is filled with refrigerant; characterized in that, flow channel include: The supply channel has its inlet end connected to the injection port; The main flow channel includes at least two heat dissipation flow channels, both of which are connected to the outflow end of the supply flow channel. The inflow end of the manifold is connected to the outflow end of the heat dissipation channel, and the outflow end is connected to the liquid outlet, so that the refrigerant of the heat dissipation channel can be discharged from the liquid outlet through the manifold. Each heat dissipation channel can be connected to the liquid outlet through a confluence channel; or, two heat dissipation channels can be connected to the liquid outlet through a confluence channel, and when two heat dissipation channels are connected to the liquid outlet through a confluence channel, the two heat dissipation channels are respectively located on both sides of the inflow end of the confluence channel.

2. The liquid cooling plate according to claim 1, characterized in that, When the main flow channel includes two heat dissipation channels, the two heat dissipation channels are distributed on both sides of the supply flow channel, or the two heat dissipation channels are located on the same side of the supply flow channel and connected to the same confluence flow channel.

3. The liquid cooling plate according to claim 2, characterized in that, When two heat dissipation channels are located on the same side of the supply channel, the two heat dissipation channels are located on opposite sides of the outlet end of the supply channel.

4. The liquid cooling plate according to claim 1, characterized in that, When the main flow channel includes four heat dissipation channels, two heat dissipation channels are respectively set on both sides of the supply channel, and the heat dissipation channels on both sides of the supply channel are respectively connected to the liquid outlet through a confluence channel.

5. The liquid cooling plate according to claim 1, characterized in that, Liquid cooling plates include: The first heat dissipation zone is equipped with a heat dissipation channel; The second heat dissipation zone is equipped with a heat dissipation channel; The first heat dissipation area and the second heat dissipation area are symmetrically arranged, and / or the length of the heat dissipation channel in the first heat dissipation area is equal to the length of the heat dissipation channel in the second heat dissipation area.

6. The liquid cooling plate according to claim 5, characterized in that, The heat dissipation channels of the first heat dissipation zone and the heat dissipation channels of the second heat dissipation zone are symmetrically arranged.

7. The liquid cooling plate according to claim 1, characterized in that, Liquid cooling plates include: The first heat dissipation zone has two heat dissipation channels; The second heat dissipation zone is provided with two heat dissipation channels, and the second heat dissipation zone and the first heat dissipation zone are located on opposite sides of the supply channels; The first heat dissipation zone and the second heat dissipation zone are symmetrically arranged, and / or the heat dissipation channels of the first heat dissipation zone and the heat dissipation channels of the second heat dissipation zone are symmetrically arranged.

8. The liquid cooling plate according to claim 7, characterized in that, The two heat dissipation channels in the first heat dissipation zone / second heat dissipation zone are symmetrically arranged, or, the first heat dissipation zone / The two heat dissipation channels in the second heat dissipation zone are of equal length.

9. The liquid cooling plate according to claim 1, characterized in that, The flow area of ​​the supply channel is smaller than that of the main flow channel.

10. The liquid cooling plate according to claim 1, characterized in that, The flow area of ​​the confluence channel is smaller than that of the main flow channel.

Images