Liquid cooling plate and battery pack

Abstract

The invention provides a liquid cooling plate and a battery pack, and relates to the technical field of liquid cooling heat dissipation. The liquid cooling plate comprises a cooling plate body, a first fin and a plurality of second fins. The cold plate body is provided with a liquid cooling cavity, a liquid inlet pipe and a liquid outlet pipe are arranged on the cold plate body, and the liquid inlet pipe and the liquid outlet pipe are both communicated with the liquid cooling cavity. The first fins are arranged in the liquid cooling cavity, the second fins are arranged in the liquid cooling cavity, the multiple second fins are arranged at intervals along the peripheral side of the first fins, the liquid inlet pipe and the liquid outlet pipe are arranged corresponding to the second fins, and the second fins are used for guiding cooling liquid entering from the liquid inlet pipe to the liquid outlet pipe. The first fins play a role in improving the structural rigidity of the cold plate body and expanding the heat dissipation area. And the plurality of second fins are arranged at intervals along the peripheral side of the first fin to form a multi-stage shunting structure distributed along the radial direction of the first fin so as to cover a larger heat dissipation area and reduce the flow resistance of the cooling liquid, so that the overall temperature uniformity of the liquid cooling plate is improved, and the pump power consumption of an external liquid cooling device is reduced.

Description

Technical Field

[0001] This application relates to the technical field of liquid cooling heat dissipation, and particularly relates to a liquid cooling plate and a battery pack. Background Art

[0002] The battery cell module is the core component of the battery pack, responsible for storing and providing electrical energy. A large amount of heat is generated during the charging and discharging process of the battery cell module. In order to ensure the safe and stable operation of the battery cell module, heat dissipation design needs to be carried out inside the battery pack.

[0003] In the related art, a liquid cooling plate is arranged inside the battery pack to dissipate heat from the battery cell module. The liquid cooling plate has a liquid cooling channel inside, and the liquid cooling channel is arranged corresponding to the battery cell module. The coolant flows in the liquid cooling channel and undergoes conjugate heat transfer with the inner wall of the liquid cooling channel, thereby taking away the heat generated by the battery cell module. The existing liquid cooling channels are usually in the shapes of snake type, meandering type, etc.

[0004] However, the liquid cooling channel of the above liquid cooling plate is relatively long, resulting in a large flow resistance of the coolant and a poor temperature uniformity of the liquid cooling plate. Summary of the Invention

[0005] Embodiments of this application provide a liquid cooling plate and a battery pack to solve the problem that the liquid cooling channel of the liquid cooling plate is relatively long, resulting in a large flow resistance of the coolant and a poor temperature uniformity of the liquid cooling plate.

[0006] In a first aspect, a liquid cooling plate provided by an embodiment of this application includes:

[0007] A cold plate body, the cold plate body has a liquid cooling cavity, an inlet pipe and an outlet pipe are arranged on the cold plate body, and both the inlet pipe and the outlet pipe are communicated with the liquid cooling cavity;

[0008] A first fin, the first fin is arranged in the liquid cooling cavity;

[0009] A plurality of second fins, the second fins are arranged in the liquid cooling cavity, the plurality of second fins are arranged at intervals along the circumferential side of the first fin, both the inlet pipe and the outlet pipe are arranged corresponding to the second fins, and the second fins are used to guide the coolant entering from the inlet pipe to the outlet pipe.

[0010] In some possible implementation manners, for the liquid cooling plate provided by an embodiment of this application, liquid cooling channels are respectively formed between two adjacent second fins, between some second fins and the edge of the cold plate body, and between some second fins and the first fin, and the liquid cooling channels are used to guide the flow of the coolant.

[0011] In some possible implementation manners, for the liquid cooling plate provided by an embodiment of this application, at least some of the second fins are first arc-shaped members, and the inner side of the first arc-shaped member faces the first fin.

[0012] In some possible implementation manners, for the liquid cooling plate provided in the embodiments of the present application, one end of the first fin extends to the edge of the cold plate body, and the liquid inlet pipe and the liquid outlet pipe are respectively located on opposite sides of the first fin.

[0013] In some possible implementation manners, for the liquid cooling plate provided in the embodiments of the present application, the first fin includes a main trunk portion and at least two branch portions. One end of the main trunk portion extends to the edge of the cold plate body, and the respective branch portions are disposed on both sides of the main trunk portion.

[0014] In some possible implementation manners, for the liquid cooling plate provided in the embodiments of the present application, the main trunk portion is a second arc-shaped member, the branch portion is a third arc-shaped member, the inner side of the second arc-shaped member faces the liquid outlet pipe, and the inner side of at least a part of the third arc-shaped member faces the second arc-shaped member.

[0015] In some possible implementation manners, for the liquid cooling plate provided in the embodiments of the present application, a plurality of second fins and a part of the cold plate body form a first flow guiding portion, a transition portion, and a second flow guiding portion that are connected in sequence. The first flow guiding portion and the second flow guiding portion are respectively located on both sides of the first fin. The first flow guiding portion is correspondingly arranged with the liquid inlet pipe, and the second flow guiding portion is correspondingly arranged with the liquid outlet pipe;

[0016] The coolant entering from the liquid inlet pipe flows to the liquid outlet pipe along the first flow guiding portion, the transition portion, and the second flow guiding portion in sequence.

[0017] In some possible implementation manners, for the liquid cooling plate provided in the embodiments of the present application, both the liquid inlet pipe and the liquid outlet pipe are located on the same side of the cold plate body.

[0018] In a second aspect, the battery pack provided in the embodiments of the present application includes a battery pack body and the liquid cooling plate as described in any one of the above on the battery pack body.

[0019] In some possible implementation manners, for the battery pack provided in the embodiments of the present application, the battery pack body includes a plurality of battery cells stacked in sequence, and a liquid cooling plate is disposed between two adjacent battery cells.

[0020] The present invention provides a liquid cooling plate and a battery pack. The liquid cooling plate includes a cold plate body, a first fin, and a plurality of second fins. The cold plate body has a liquid cooling cavity, and an inlet pipe and an outlet pipe are arranged on the cold plate body. Both the inlet pipe and the outlet pipe are communicated with the liquid cooling cavity. The first fin is arranged in the liquid cooling cavity, and the second fins are arranged in the liquid cooling cavity. The plurality of second fins are arranged at intervals along the circumferential side of the first fin. The inlet pipe and the outlet pipe are both arranged corresponding to the second fins. The second fins are used to guide the coolant entering from the inlet pipe to the outlet pipe. The first fin plays a role in improving the structural stiffness of the cold plate body and expanding the heat dissipation area. The plurality of second fins are arranged at intervals along the circumferential side of the first fin, forming a multi-stage flow splitting structure distributed radially along the first fin, so as to cover a larger heat dissipation area and reduce the flow resistance of the coolant, thereby improving the overall temperature uniformity of the liquid cooling plate and reducing the pump power consumption of the external liquid cooling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are incorporated herein and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0022] Figure 1 It is a partial structural schematic diagram of the battery pack provided by the embodiment of the present application;

[0023] Figure 2 is Figure 1 the A-A cross-sectional view of the liquid cooling plate in

[0024] Figure 3 is Figure 2 the flow diagram of the coolant in

[0025] Figure 4 is Figure 2 the schematic diagram of the first diversion part, the transition part, and the second diversion part in the liquid cooling cavity in

[0026] Description of the reference numerals:

[0027] 10. Liquid cooling plate;

[0028] 100. Cold plate body; 110. Liquid cooling cavity;

[0029] 200. Inlet pipe;

[0030] 300. Outlet pipe;

[0031] 400. First fin; 410. Main trunk part; 420. Branch part;

[0032] 500. Second fin; 510. First diversion part; 520. Transition part; 530. Second diversion part

[0033] 20. Battery cell.

[0034] Through the above-mentioned accompanying drawings, specific embodiments of the present application have been shown, and will be described in more detail hereinafter. These drawings and the written description are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by reference to specific embodiments. Detailed Description of the Invention

[0035] Here, exemplary embodiments will be described in detail, and examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0036] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0037] As described in the background art, in the related art, a liquid cooling plate is provided in the battery pack to dissipate heat from the battery cell module. The liquid cooling plate has a liquid cooling flow channel inside, and the liquid cooling flow channel is arranged corresponding to the battery cell module. The coolant flows in the liquid cooling flow channel and undergoes conjugate heat transfer with the inner wall of the liquid cooling flow channel, thereby taking away the heat generated by the battery cell module. The existing liquid cooling flow channels are usually in the shapes of snake type, meandering type, etc.

[0038] However, the liquid cooling flow channel of the above-mentioned liquid cooling plate is relatively long, resulting in a relatively large flow resistance of the coolant and a relatively poor temperature uniformity of the liquid cooling plate.

[0039] For example, in the related art, common liquid cooling plates usually adopt the buried pipe process, embedding copper pipes into an aluminum alloy substrate. The coolant flows inside the copper pipes to take away the heat. Due to the relatively small heat dissipation area of the copper pipes, the overall heat dissipation efficiency of the liquid cooling plate is relatively low, and the longer the copper pipes, the worse the temperature uniformity of the entire cold plate, and the greater the power consumption of the pump for transporting the coolant. At the same time, the liquid cooling plate designed in this way also has relatively poor structural strength.

[0040] In view of the above problems existing in the prior art, the present invention provides a liquid cooling plate and a battery pack. The liquid cooling plate includes a cold plate body, a first fin, and a plurality of second fins. The cold plate body has a liquid cooling cavity, and an inlet pipe and an outlet pipe are provided on the cold plate body. Both the inlet pipe and the outlet pipe are communicated with the liquid cooling cavity. The first fin is arranged in the liquid cooling cavity, and the second fins are arranged in the liquid cooling cavity. The plurality of second fins are arranged at intervals along the circumferential side of the first fin. Both the inlet pipe and the outlet pipe are correspondingly arranged with the second fins. The second fins are used to guide the coolant entering from the inlet pipe to the outlet pipe. The first fin plays a role in improving the structural stiffness of the cold plate body and expanding the heat dissipation area. The plurality of second fins are arranged at intervals along the circumferential side of the first fin, forming a multi-stage flow splitting structure distributed radially along the first fin to cover a larger heat dissipation area and reduce the flow resistance of the coolant, thereby improving the overall temperature uniformity of the liquid cooling plate and reducing the pump power consumption of the external liquid cooling device.

[0041] Hereinafter, an exemplary application scenario of the present invention will be introduced.

[0042] The liquid cooling plate provided by the present invention can be applied in a battery pack to dissipate heat from the battery cell modules in the battery pack. Specifically, for the liquid cooling plate provided by the present invention, the plurality of second fins are arranged at radial intervals along the circumferential side of the first fin, forming a multi-stage flow splitting structure distributed radially along the first fin to cover a larger heat dissipation area and reduce the flow resistance of the coolant, thereby improving the overall temperature uniformity of the liquid cooling plate and reducing the pump power consumption of the external liquid cooling device.

[0043] Hereinafter, specific embodiments will be used to describe in detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0044] Refer to Figure 2 and Figure 3 As shown in, the liquid cooling plate 10 provided in the embodiment of the present application includes a cold plate body 100, a first fin 400, and a plurality of second fins 500.

[0045] The cold plate body 100 has a liquid cooling cavity 110, and an inlet pipe 200 and an outlet pipe 300 are provided on the cold plate body 100. Both the inlet pipe 200 and the outlet pipe 300 are communicated with the liquid cooling cavity 110. The first fin 400 is arranged in the liquid cooling cavity 110, and the second fins 500 are arranged in the liquid cooling cavity 110. The plurality of second fins 500 are arranged at intervals along the circumferential side of the first fin 400. Both the inlet pipe 200 and the outlet pipe 300 are correspondingly arranged with the second fins 500. The second fins 500 are used to guide the coolant entering from the inlet pipe 200 to the outlet pipe 300.

[0046] It can be understood that the liquid inlet pipe 200 and the liquid outlet pipe 300 can both be connected to an external liquid cooling device. The liquid cooling device transports cooling liquid into the liquid cooling cavity 110 of the cold plate body 100 through the liquid inlet pipe 200. The cooling liquid flows into the liquid cooling cavity 110, takes away the heat generated by the battery cell 20, and then returns to the liquid cooling device through the liquid outlet pipe 300.

[0047] Among them, a plurality of second fins 500 are arranged at intervals along the circumferential side of the first fin 400, forming at least two flow paths, that is, the flow path formed by the second fin 500 and the first fin 400, and the flow path formed by the second fin 500 and the edge of the cold plate body 100. Thus, the cooling liquid entering the liquid cooling cavity 110 can be divided into at least two branches, so as to cover a larger heat dissipation area, avoid local overheating, and improve the overall temperature uniformity of the liquid cooling plate 10.

[0048] Furthermore, please refer to Figure 3 As shown, the arrows indicate the flow paths of the respective branches of the cooling liquid. A plurality of second fins 500 can be arranged at intervals radially along the circumferential side of the first fin 400, forming a plurality of flow paths distributed radially along the first fin 400, thereby increasing the flow rate and covering a larger heat dissipation area.

[0049] Moreover, in this way, the traditional single path is transformed into a multi-stage flow splitting structure, so as to shorten the flow path of the cooling liquid, reduce the flow resistance of the cooling liquid, thereby increasing the flow rate of the cooling liquid, further improving the overall temperature uniformity of the liquid cooling plate 10, and also reducing the pump power consumption of the external liquid cooling device.

[0050] Refer to Figures 2 to 4 As shown, the first fin 400 can be arranged in the central area of the liquid cooling cavity 110. The first fin 400 can be the main load-bearing structure, playing a role in structural support to improve the overall stiffness of the cold plate body 100. At the same time, the first fin 400 can also play a role in expanding the heat dissipation area. A plurality of second fins 500 are arranged at intervals radially along the circumferential side of the first fin 400. Part of the cooling liquid can contact the first fin 400 through the gap between two adjacent second fins 500 to take away the heat of the cold plate body 100 in the area of the first fin 400.

[0051] It can be understood that a plurality of second fins 500 can also be used as auxiliary load-bearing structures to play an auxiliary support role.

[0052] Exemplarily, the shape of the first fin 400 can be circular, oval, arc-shaped, coral tree-like, etc. The embodiments of the present application do not impose too many restrictions on this.

[0053] In summary, in the liquid cooling plate 10 provided by the embodiments of the present application, the first fins 400 are arranged in the liquid cooling cavity 110, and the first fins 400 play a role in improving the structural stiffness of the cold plate body 100 and expanding the heat dissipation area. A plurality of second fins 500 are radially spaced along the circumference of the first fin 400 to form a multi-stage flow splitting structure distributed radially along the first fin 400, so as to cover a larger heat dissipation area and reduce the flow resistance of the coolant, thereby improving the overall temperature uniformity of the liquid cooling plate 10 and reducing the pump power consumption of the external liquid cooling device.

[0054] Referring to Figure 2 and Figure 3 As shown, liquid cooling channels are respectively formed between two adjacent second fins 500, between some second fins 500 and the edge of the cold plate body 100, and between some second fins 500 and the first fin 400, and the liquid cooling channels are used to guide the flow of the coolant.

[0055] In the above embodiment, this structural setting can form a plurality of liquid cooling channels, and the liquid cooling channels are sequentially connected to guide the coolant to the liquid outlet pipe 300.

[0056] Referring to Figure 2 As shown, in some embodiments, at least some of the second fins 500 are first arc-shaped members, and the inner side of the first arc-shaped member faces the first fin 400.

[0057] In the above embodiment, at least some of the second fins 500 are first arc-shaped members, and the first arc-shaped members can reduce the flow resistance of the coolant. Similar to the streamline design, it allows the coolant to flow more smoothly, reducing turbulence and pressure drop. Moreover, the first arc-shaped members can increase the contact area with the coolant to improve the heat dissipation efficiency.

[0058] Wherein, the inner side of the first arc-shaped member faces the first fin 400, so that the coolant flows around the circumference of the first fin 400 and guides the coolant entering from the liquid inlet pipe 200 to the liquid outlet pipe 300.

[0059] It can be understood that at least some of the second fins 500 being first arc-shaped members can mean that some of the second fins 500 are first arc-shaped members and the other part of the second fins 500 are straight structures. It can also be that all the second fins 500 are first arc-shaped members, and the embodiments of the present application do not limit this too much.

[0060] Exemplarily, the length of the first arc-shaped member can be 20 mm to 60 mm, such as 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, etc.

[0061] Exemplarily, the width of the first arc-shaped member can be 5 mm to 10 mm, such as 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0062] Exemplarily, the bending angle of the first arc-shaped member can be 10° to 40°, such as 10°, 20°, 30°, 40°, etc.

[0063] Referring to Figure 2 As shown, in some embodiments, one end of the first fin 400 extends to the edge of the cold plate body 100, and the liquid inlet pipe 200 and the liquid outlet pipe 300 are respectively located on opposite sides of the first fin 400.

[0064] In the above embodiment, the first fin 400 is located in the central area of the cold plate body 100, and one end of it extends to the edge of the cold plate body 100. In this way, the first fin 400 can serve as a longitudinal reinforcing rib to penetrate the cold plate body 100 to form a main load-bearing structure, significantly improving the overall bending stiffness.

[0065] Among them, the liquid inlet pipe 200 and the liquid outlet pipe 300 are respectively located on opposite sides of the first fin 400. The coolant flows from the liquid inlet pipe 200 to the liquid outlet pipe 300 around the circumferential side of the first fin 400 under the action of the second fin 500. The flow path of the coolant is in an arched structure. In this way, while ensuring that the coolant covers a large heat dissipation area, the flow path of the coolant can be reduced.

[0066] Referring to Figure 2 As shown, in some embodiments, the first fin 400 includes a main body part 410 and at least two branch parts 420. One end of the main body part 410 extends to the edge of the cold plate body 100, and each branch part 420 is respectively arranged on both sides of the main body part 410.

[0067] In the above embodiment, the first fin 400 is designed with a topological structure in the form of a coral tree skeleton. The main body part 410 is equivalent to the main trunk structure of the coral tree, and the branch parts 420 are equivalent to the branch structures of the coral tree. In this way, a multi-level branch load-bearing structure is formed. The main body part 410 serves as the core load point, and multiple branch parts 420 form a gradient stress diffusion network. The external load is transmitted through multiple paths through the branch nodes to avoid local stress concentration, thereby improving the overall structural strength of the cold plate body 100.

[0068] Moreover, the first fin 400 is designed with a topological structure in the form of a coral tree skeleton, and this structure can also increase the contact area between the first fin 400 and the coolant, so that the first fin 400 plays a role in expanding the heat dissipation area.

[0069] It can be understood that there are at least two branch parts 420, and the number of branch parts 420 can be two. The number of branch parts 420 can also be more than two, such as 3, 4, 5, 6, 7, 8, etc. The embodiments of the present application do not limit this too much.

[0070] Preferably, the number of the branch parts 420 can be an even number, and the multiple branch parts 420 are arranged in a mirror symmetry with the main trunk part 410 as the symmetry axis.

[0071] Referring to Figure 2 As shown, in some embodiments, the main trunk part 410 is a second arc-shaped member, the branch part 420 is a third arc-shaped member, the inner side of the second arc-shaped member faces the liquid outlet pipe 300, and the inner side of at least part of the third arc-shaped member faces the second arc-shaped member.

[0072] In the above embodiments, both the main trunk part 410 and the branch part 420 are arc-shaped structures. The arc-shaped structure can better adapt to the complex stress distribution, effectively disperse and resist the external load, so that the first fin 400 has better structural strength, thereby improving the bearing capacity of the cold plate body 100.

[0073] Among them, the inner side of the second arc-shaped member faces the liquid outlet pipe 300, and the inner side of the third arc-shaped member faces the second arc-shaped member, which can play a guiding role for the coolant, so that the coolant flows smoothly to the liquid outlet pipe 300.

[0074] Exemplarily, the length of the main trunk part 410 can be 300 mm to 500 mm, such as 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, etc. The width can be 20 mm to 30 mm, such as 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, etc. The bending angle can be 10° to 20°, such as 10°, 12°, 14°, 16°, 18°, 20°, etc.

[0075] Exemplarily, the length of the branch part 420 can be 100 mm to 150 mm, such as 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, etc. The width can be 10 mm to 20 mm, such as 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, etc. The bending angle can be 10° to 30°, such as 10°, 15°, 20°, 25°, 30°, etc.

[0076] Referring to Figure 2 and Figure 4 As shown, in some embodiments, a plurality of second fins 500 and a part of the cold plate body 100 form a first diversion part 510, a transition part 520 and a second diversion part 530 which are connected in sequence. The first diversion part 510 and the second diversion part 530 are respectively located on both sides of the first fin 400. The first diversion part 510 is correspondingly arranged with the liquid inlet pipe 200, and the second diversion part 530 is correspondingly arranged with the liquid outlet pipe 300.

[0077] The coolant entering through the liquid inlet pipe 200 flows sequentially along the first diversion part 510, the transition part 520, and the second diversion part 530 to the liquid outlet pipe 300.

[0078] In the above embodiment, the first diversion part 510 and the second diversion part 530 are respectively located on both sides of the first fin 400. After the coolant enters the liquid cooling cavity 110 through the liquid inlet pipe 200, it flows through the first diversion part 510, the transition part 520, and the second diversion part 530 in sequence to take away the heat generated by the battery cell 20, and then flows out of the liquid cooling cavity 110 through the liquid outlet pipe 300. Moreover, part of the coolant at the first diversion part 510, the transition part 520, and the second diversion part 530 can flow to the first fin 400, and the heat dissipation area of the coolant is expanded through the first fin 400, thereby improving the cooling efficiency of the liquid cooling plate 10 for the battery cell 20.

[0079] Refer to Figure 2 and Figure 4 As shown, in some embodiments, the length of the second fin 500 on the transition part 520 is less than the lengths of the second fins 500 on the first diversion part 510 and the second diversion part 530.

[0080] In the above embodiment, this structure realizes progressive flow state regulation during the fluid flow process by differentiating the lengths of the second fins 500 on the transition part 520, the first diversion part 510, and the second diversion part 530. The shorter second fin 500 makes the flow channel cross-section of the transition part 520 change gently, which not only avoids the high-speed impact of the coolant entering from the first diversion part 510, but also guides the coolant to smoothly transition to the second diversion part 530, effectively suppressing the generation of eddy currents and reducing the local pressure drop.

[0081] Exemplarily, the lengths of the second fins 500 on the first diversion part 510 and the second diversion part 530 can be 40 mm to 60 mm, and the length of the second fin 500 on the transition part 520 can be 20 mm to 40 mm.

[0082] In this way, the second fins 500 on the first diversion part 510, the second diversion part 530, and the transition part 520 can increase the contact area between the second fins 500 and the coolant through the gradual change of the flow channel cross-sectional area, and cooperate with the secondary flow effect generated by the directional flow to further improve the convective heat transfer coefficient. At the same time, the flow resistance of the cold plate is also significantly reduced, realizing enhanced heat transfer of the coolant in turbulent flow.

[0083] In summary, compared with the conventional liquid cooling plate 10 with a serpentine buried pipe process, this liquid cooling plate 10 can increase the overall stiffness of the liquid cooling plate 10 by 45%, and the first-order modal frequency reaches 105 Hz to adapt to vibrations or impacts under complex working conditions. Through computational fluid dynamics (CFD) simulation optimization, the effective heat dissipation area can be increased by 32%, and the pressure drop can be reduced by about 18%.

[0084] Referring to Figures 2 to 4 As shown, in some embodiments, the liquid inlet pipe 200 and the liquid outlet pipe 300 are respectively located on the same side of the cold plate body 100.

[0085] In the above embodiments, both the liquid inlet pipe 200 and the liquid outlet pipe 300 are located on the same side of the cold plate body 100, which can facilitate the docking with an external liquid cooling device to reduce the length of the water pipe.

[0086] Specifically, referring to Figures 2 to 4 As shown, the main part 410 of the first fin 400 extends between the liquid inlet pipe 200 and the liquid outlet pipe 300 and is located at the central axis of the cold plate body 100, so that the liquid inlet pipe 200 and the liquid outlet pipe 300 are symmetrically arranged with respect to the first fin 400, and the first flow guiding part 510 and the second flow guiding part 530 are symmetrically arranged with respect to the first fin 400.

[0087] Among them, the cold plate body 100 can be made of high thermal conductivity aluminum alloy. The cold plate body 100 can include a bottom plate and an upper cover. The first fin 400 and the second fin 500 are formed on the bottom plate by friction stir welding process, and then the bottom plate and the upper cover are fitted and sealed by friction stir welding process.

[0088] The battery pack provided by the embodiments of the present application includes a battery pack body and a liquid cooling plate 10 as described in any one of the above on the battery pack body.

[0089] Among them, the liquid cooling plate 10 can be connected to the battery cells 20 of the battery pack body to dissipate heat from the battery cells 20.

[0090] In the above structural arrangement, since the battery pack adopts the liquid cooling plate 10 in the above embodiments, accordingly, it also has the advantages and benefits brought by the above liquid cooling plate 10, that is, the flow resistance of the coolant in the liquid cooling plate 10 is small, and the overall temperature uniformity of the liquid cooling plate 10 is strong, so as to improve the heat dissipation efficiency of the battery cells 20 inside the battery pack body.

[0091] Referring to Figure 1 As shown, in some embodiments, the battery pack body includes a plurality of battery cells 20 stacked in sequence, and a liquid cooling plate 10 is arranged between adjacent two battery cells 20.

[0092] In the above embodiments, a liquid cooling plate 10 can be arranged between adjacent two battery cells 20, and the heat dissipation area of the battery cells 20 is comprehensively expanded through the upper and lower surfaces of the liquid cooling plate 10 to enhance the overall heat dissipation efficiency and temperature uniformity.

[0093] Among them, a thermally conductive adhesive with insulating characteristics can be filled between the battery cell 20 and the cold plate. The thermally conductive adhesive can improve the connection stability between the two, and can also shorten the heat transfer path between the battery cell 20 and the cold plate bracket to improve the heat conduction effect.

[0094] Exemplarily, the thermal conductive adhesive can be a silicone-based thermal conductive adhesive, an epoxy resin-based thermal conductive adhesive, a polyurethane-based thermal conductive adhesive, etc., and the embodiments of the present application do not impose too many restrictions on this.

[0095] After considering the specification and practicing the content disclosed herein, those skilled in the art will readily think of other implementation manners of the present application. The present application aims to cover any variations, uses, or adaptive changes of the present application, and these variations, uses, or adaptive changes follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0096] It should be understood that the present application is not limited to the precise structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A liquid cooling plate, characterized in that: include: A cold plate body (100), the cold plate body (100) having a liquid cooling cavity (110), the cold plate body (100) being provided with a liquid inlet pipe (200) and a liquid outlet pipe (300), the liquid inlet pipe (200) and the liquid outlet pipe (300) both being in communication with the liquid cooling cavity (110); a first fin (400), the first fin (400) being arranged in the liquid cooling cavity (110); A plurality of second fins (500), wherein the second fins (500) are arranged in the liquid cooling cavity (110), and the plurality of second fins (500) are arranged at intervals along the circumference of the first fin (400), and the second fins (500) are used to guide the cooling liquid entering from the liquid inlet pipe (200) to the liquid outlet pipe (300).

2. The liquid cooling plate according to claim 1, characterized in that: Liquid cooling channels are respectively formed between two adjacent second fins (500), between part of the second fins (500) and the edge of the cold plate body (100), and between part of the second fins (500) and the first fins (400), and the liquid cooling channels are used to guide the flow of the cooling liquid.

3. The liquid cooling plate according to claim 1, characterized in that: At least a portion of the second fin (500) is a first arc-shaped piece, and the inner side of the first arc-shaped piece faces the first fin (400).

4. The liquid cooling plate according to claim 1, characterized in that: One end of the first fin (400) extends to the edge of the cold plate body (100), and the liquid inlet pipe (200) and the liquid outlet pipe (300) are respectively located on two opposite sides of the first fin (400).

5. The liquid cooling plate according to claim 4, characterized in that: The first fin (400) comprises a main body (410) and at least two branch parts (420), one end of the main body (410) extends to the edge of the cold plate body (100), and each branch part (420) is respectively arranged on both sides of the main body (410).

6. The liquid cooling plate according to claim 5, characterized in that: The main body (410) is a second arc-shaped member, the branch portion (420) is a third arc-shaped member, the inner side of the second arc-shaped member faces the liquid outlet pipe (300), and at least part of the inner side of the third arc-shaped member faces the second arc-shaped member.

7. The liquid cooling plate according to claim 4, characterized in that: The plurality of second fins (500) and part of the cold plate body (100) form a first flow guide portion (510), a transition portion (520) and a second flow guide portion (530) which are sequentially connected, the first flow guide portion (510) and the second flow guide portion (530) being respectively located on both sides of the first fin (400), the first flow guide portion (510) being arranged corresponding to the liquid inlet pipe (200), and the second flow guide portion (530) being arranged corresponding to the liquid outlet pipe (300); The cooling liquid entering through the liquid inlet pipe (200) flows in sequence along the first flow guide portion (510), the transition portion (520) and the second flow guide portion (530) to the liquid outlet pipe (300).

8. The liquid cooling plate according to any one of claims 1 to 7, characterized in that: The liquid inlet pipe (200) and the liquid outlet pipe (300) are both located on the same side of the cold plate body (100).

9. A battery pack, characterized in that: It comprises a battery pack body and a liquid cooling plate (10) according to any one of claims 1 to 8, which is arranged on the battery pack body.

10. The battery pack according to claim 9, characterized in that: The battery pack body comprises a plurality of battery cells (20) stacked in sequence, and the liquid cooling plate (10) is arranged between two adjacent battery cells (20).

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