CN216698512U

CN216698512U - Liquid cooling plate

Info

Publication number: CN216698512U
Application number: CN202123278979.3U
Authority: CN
Inventors: 周金亮; 谈作伟; 王君生; 任志博; 潘剑萍
Original assignee: Svolt Energy Technology Wuxi Co Ltd
Current assignee: Svolt Energy Technology Wuxi Co Ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-06-07
Anticipated expiration: 2031-12-23

Abstract

The application relates to battery heat dissipation technical field, especially, relate to a liquid cooling board, the liquid cooling board includes: the cooling device comprises a bottom plate, a cooling plate and a cooling plate, wherein a flow channel is formed in the bottom plate, and cooling liquid flows in the flow channel; a plurality of turbulent flow convex parts are arranged in the flow channel; the panel is buckled on the bottom plate; the battery pack comprises a battery core module, a bearing surface is formed on one side wall surface of the panel, which deviates from the battery core module, and the battery core module is arranged on the bearing surface. The application provides a liquid cooling board compares traditional liquid cooling battery package and has apparent heavy effect that subtracts, and the whole packet of energy density of improvement that can be obvious can change the form that liquid flows through the increase vortex design of convection current way, makes the coolant liquid intensive mixing, reduces the difference in temperature of importing and exporting liquid, forms even temperature field distribution to the improvement is showing the difference in temperature that reduces between the electric core.

Description

Liquid cooling plate

Technical Field

The application relates to the technical field of battery heat dissipation, in particular to a liquid cooling plate.

Background

At present, the energy storage industry has met with great development opportunities, wherein the lithium battery is used as an energy storage carrier to take a leading position of an energy storage mode, the lithium battery is used as a core component, and the safety, the charging and discharging efficiency and the cycle number of the system directly influence the performance and the benefit of the whole energy storage system.

The performance of the lithium battery is greatly influenced by the ambient temperature, various heat management modes can be adopted to solve the problem that the battery core is sensitive to the temperature in the current large-scale energy storage project, the mainstream heat management modes mainly comprise two modes, one mode is air cooling, the other mode is liquid cooling, the liquid cooling has higher heat exchange coefficient and more uniform temperature distribution compared with the air cooling, and various types of liquid cooling products are gradually released by head enterprises at present. The existing liquid cooling plate is often simple in runner design, so that the temperature difference between the electric cores is relatively large, the energy loss is large, and the defects of heat preservation design and the like need to be added.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a liquid cooling board to solve the current liquid cooling board runner design that exists among the prior art to a certain extent and simply, be difficult to ensure cooling, radiating effect, make the great technical problem of difference in temperature between the electric core relatively.

The application provides a liquid cooling board, includes:

the cooling device comprises a bottom plate, a cooling device and a cooling device, wherein a flow channel is formed in the bottom plate, and cooling liquid flows in the flow channel; a plurality of turbulence convex parts are arranged in the flow channel;

the panel is buckled on the bottom plate;

the battery pack comprises a battery core module, a bearing surface is formed on one side wall surface of the panel, which deviates from the battery core module, and the battery core module is arranged on the bearing surface.

In the above technical solution, further, the flow channel is recessed relative to the surface of the bottom plate to form a groove structure;

the number of the flow passages is multiple, and the flow passages are communicated in sequence.

In any of the above technical solutions, further, a plurality of turbulent flow convex portions are arranged in each of the flow channels; the turbulence convex parts are arranged in the flow channel in a multi-row mode, and two adjacent rows of the turbulence convex parts are arranged in a staggered mode.

In any of the above technical solutions, further, the panel is provided with a first joint and a second joint;

the first connector is in communication with one of the plurality of flow passages; the second connector is in communication with another of the plurality of flow passages.

In any of the above technical solutions, further, a flow guiding protrusion is disposed at a corner of the flow channel; the bottom plate is formed with a reinforcement portion except for the flow channel.

In any of the above technical solutions, further, the bottom plate and the face plate are connected by vacuum brazing;

the first joint and the second joint are connected by means of vacuum brazing.

In any one of the above technical solutions, further, the battery pack further includes a fixing member, the fixing member has a groove structure with at least one end open, and the liquid cooling plate is disposed at the opening.

In any of the above technical solutions, further, the liquid cooling plate further includes a connecting member, and the connecting member penetrates through the bottom plate and the face plate to be connected with the fixing member;

the connector is an FDS screw.

In any of the above technical solutions, further, the panel thickness is 0.8mm to 1.3 mm;

the thickness of the bottom plate is 0.8mm-1.3 mm;

the heights of the turbulence convex part and the flow guide convex part are both 3.0-3.8 mm.

In any of the above technical solutions, further, at least the bearing surface of the liquid cooling plate is provided with an insulating layer.

Compared with the prior art, the beneficial effect of this application is:

the application provides a liquid cooling plate includes: the cooling device comprises a bottom plate, a cooling plate and a cooling plate, wherein a flow channel is formed in the bottom plate, and cooling liquid flows in the flow channel; a plurality of turbulence convex parts are arranged in the flow channel; the panel is buckled on the bottom plate; the battery pack comprises a battery core module, a bearing surface is formed on one side wall surface of the panel, which deviates from the battery core module, and the battery core module is arranged on the bearing surface.

The application provides a liquid cooling board compares traditional liquid cooling battery package and has apparent heavy effect that subtracts, and the whole packet of energy density of improvement that can be obvious can change the form that liquid flows through the increase vortex design of convection current way, makes the coolant liquid intensive mixing, reduces the difference in temperature of importing and exporting liquid, forms even temperature field distribution to the improvement is showing the difference in temperature that reduces between the electric core.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a bottom plate of a liquid cooling plate according to an embodiment of the present disclosure;

fig. 3 is another perspective view of a liquid-cooled panel according to an embodiment of the present application.

Reference numerals:

1-panel, 2-bottom plate, 201-flow channel, 202-turbulence convex part, 203-flow guide convex part, 204-reinforcing part, 3-first joint, 4-second joint, 5-battery cell module, a-first direction and b-second direction.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.

The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

A liquid-cooled panel according to an embodiment of the present application is described below with reference to fig. 1 to 3.

Referring to fig. 1 to 3, an embodiment of the present application provides a liquid cooling plate for a lithium battery pack, where the liquid cooling plate includes: a bottom plate 2 and a panel 1, wherein the panel 1 is buckled above the bottom plate 2, the bottom plate 2 is connected with the panel 1, a flow channel 201 is formed on the bottom plate 2, cooling liquid flows in the flow channel 201, the battery pack comprises a battery cell module 5, the panel 1 has thermal conductivity, a bearing surface is formed on the outer surface of the panel 1, the battery cell module 5 is arranged on the bearing surface, heat generated by the battery cell module 5 can be transferred to the panel 1 and absorbed by the cooling liquid circularly flowing in the flow channel 201 below the panel 1, the battery cell module 5 is continuously and sequentially radiated, a plurality of turbulence convex parts 202 are formed in the flow channel 201, the turbulence convex parts 202 are convex relative to the upper surface of the flow channel 201 and are in surface contact with the lower plate of the panel 1, the effect of the cooling liquid flowing in the flow channel 201 can be enhanced, thereby the heat exchange coefficient is improved, the heat radiation effect of the battery cell module 5 is ensured, and temperature difference in each position in the flow channel 201 can be avoided, thereby guarantee to carry out effective heat dissipation to a plurality of electric cores homoenergetic that electric core module 5 contained.

Further, the runners 201 have a groove structure formed by stamping the bottom plate 2 and sinking downward, and a plurality of runners 201 are formed on the bottom plate 2, the runners 201 are sequentially arranged along the first direction a, and the runners 201 are sequentially communicated, so that the cooling liquid can smoothly flow through the runners 201, and a plurality of turbulence protrusions are arranged in each runner 201.

The first flow channel 201 is defined as a head end flow channel, the last flow channel 201 is a tail end flow channel, and a plurality of flow channels 201 are arranged between the head end flow channel and the tail end flow channel, preferably, as shown in fig. 1 and fig. 2, in this application, the number of the flow channels 201 may be four, and two flow channels 201 are arranged between the head end flow channel and the tail end flow channel, and of course, the number of the flow channels 201 is specifically determined by the size of the bottom plate 2 and the number of the cell modules 5 that the panel 1 needs to bear.

The loading face of panel 1 is provided with first joint 3 and second and connects 4, and first joint 3 and second connect 4 as the inlet and the liquid outlet of coolant liquid respectively, and first joint 3 communicates with the head end runner at least, and the second connects 4 at least with terminal runner intercommunication to make coolant liquid can last circulation flow in runner 201, in order to ensure cooling, radiating effect, need not extra pipeline switching moreover, reduce water cooling pipeline's failure risk point.

Preferably, panel 1, bottom plate 2, first joint 3 and second joint 4 are all made of AL3003MOD material, and more preferably, panel 1 and bottom plate 2 and first joint 3, second joint 4 and panel 1 are all connected by means of vacuum brazing, so that not only can welding strength and welding quality be ensured, but also the liquid cooling plate has lighter weight, and the increase of the overall weight of the lithium battery is avoided.

Further, a plurality of turbulator protrusions 202 are arranged in each runner 201, and in each runner 201, the plurality of turbulator protrusions 202 are equally divided into a plurality of rows and arranged in the runner 201, the plurality of rows of turbulator protrusions 202 are arranged at intervals along a first direction a, and each row of turbulator protrusions 202 comprises a plurality of turbulator protrusions 202 distributed at intervals along a second direction b, wherein the first direction a is perpendicular to the second direction b.

Furthermore, two adjacent rows of turbulence convex portions 202 are arranged in a staggered manner, taking the head end flow channel as an example, three rows of turbulence convex portions 202 are arranged in the head end flow channel, a first gap is formed between any adjacent two of the turbulence convex portions 202 in the first row, a second gap is formed between any adjacent two of the turbulence convex portions 202 in the second row, and the first gap is arranged facing the second gap, so that turbulence can be further enhanced and the heat exchange coefficient can be improved.

Preferably, by the direction that the central line that extends along second direction b of bottom plate 2 extends towards bottom plate 2's the left and right sides limit as the center, the interval between the vortex convex part 202 of adjacent two rows increases gradually to thereby can adjust the flow distribution of adjustment coolant liquid for the resistance between the different runners 201 in a plurality of runners 201, help strengthening temperature field evenly distributed between each runner 201 of liquid cooling plate, in order to ensure the cooling effect to electric core module 5.

Preferably, a special-shaped flow guide convex part 203 is arranged at the corner turning-over position in each flow channel 201, the flow guide convex part 203 has an L-shaped or U-shaped structure, and the corner of the L-shaped structure is arranged corresponding to the corner of the flow channel 201, so that the resistance drop of the flow channel 201 can be reduced, the distribution of fluid can be optimized, and the flow of each flow channel 201 can be equalized.

Further, as shown in fig. 2, the plurality of flow channels 201 occupy most of the bottom plate 2, the bottom plate 2 is also stamped and formed with a plurality of reinforcing portions 204 except for the flow channels 201, the reinforcing portions 204 are recessed downward relative to the upper plate surface of the bottom plate 2, preferably, the reinforcing portions 204 are L-shaped, the plurality of reinforcing portions 204 are not communicated with the flow channels 201, and the cooling liquid is not required to be injected, the plurality of reinforcing portions 204 are provided on the upper surface (the side surface facing the panel 1) of the bottom plate 2, and the plurality of reinforcing portions 204 are used for improving the overall strength of the bottom plate 2 and the liquid cooling plate.

Further, in the present embodiment, the thickness of the panel 1 is 0.8mm to 1.3mm, preferably 1.2 mm; the thickness of the bottom plate 2 is 0.8mm-1.3mm, preferably 1.2 mm; the heights of the turbulence convex part 202 and the flow guide convex part 203 are both 3.0-3.8mm, preferably 3.5mm, so that the total height of the whole liquid cooling plate is about 5.9mm, the thickness of the liquid cooling plate is controlled to a greater extent on the premise of ensuring the cooling and heat dissipation effects, and the phenomenon that too much space is occupied and the installation and the arrangement of the battery cell module 5 are influenced is avoided.

Further, this liquid cooling plate still includes the connecting piece, the battery package includes fixed component, wherein fixed component has frame construction, the bottom plate 2, panel 1 passes through the connecting piece and is connected with fixed component's frame, so that this liquid cooling plate can the bottom opening of shutoff fixed component, make this liquid cooling plate and fixed component form the cell body structure that can hold electric core module 5 jointly, wherein the preferred FDS screw of connecting piece, the FDS screw runs through bottom plate 2, panel 1 is connected with fixed component, compare in ordinary screw, FDS screw and bottom plate 2, panel 1 wears to establish position cooperation sealing washer and has better sealed effect, avoid the coolant liquid seepage.

Further, the liquid cooling board that this application provided, the surface of panel 1 at least is that the bearing surface spraying has insulating varnish, and preferably, the whole surface of this liquid cooling board all sprays insulating varnish to improve insulating nature, avoid taking place the electric leakage condition, improve the safety in utilization of battery package.

To sum up, the liquid cooling board that this application provided specifically adopts the brazed liquid cooling board of punching press, the direction of height size is less than 6mm, can reduce the height of whole battery package, traditional liquid cooling battery package is compared to weight has apparent subtract heavy effect, the whole energy density of package of improvement that can be obvious, the runner of punching press formation, the design through the runner form can change liquid flow's form, make the coolant liquid intensive mixing, reduce the difference in temperature of importing and exporting liquid, form even temperature field distribution, thereby the improvement is showing the difference in temperature that reduces between the electric core.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling plate for a battery pack, comprising:

the panel is buckled on the bottom plate;

2. The liquid cold plate of claim 1, wherein said flow channel is recessed relative to a face of said base plate to form a channel structure;

3. The liquid cold plate of claim 2, wherein a plurality of turbulating protrusions are disposed in each of said channels; the turbulence convex parts are arranged in the flow channel in a multi-row mode, and two adjacent rows of the turbulence convex parts are arranged in a staggered mode.

4. The liquid cold plate of claim 2, wherein said face plate is provided with a first joint and a second joint;

5. The liquid cooled plate of claim 1, wherein flow directing protrusions are provided at corners of the flow passages; the bottom plate is formed with a reinforcement portion except for the flow channel.

6. The liquid-cooled panel of claim 4, wherein the bottom plate is joined to the face plate by vacuum brazing;

the first joint and the second joint are connected by means of vacuum brazing.

7. The liquid cooled plate of any one of claims 1 to 6, wherein the battery pack further comprises a fixing member having a channel structure with at least one end open, the liquid cooled plate being disposed at the opening.

8. The liquid cooled panel of claim 7 further comprising a connector extending through the bottom panel, the face panel and the securing member;

the connector is an FDS screw.

9. The liquid cooled panel of claim 5, wherein the face sheet thickness is 0.8mm to 1.3 mm;

the thickness of the bottom plate is 0.8mm-1.3 mm;

10. A liquid-cooled plate according to any of claims 1 to 6, characterized in that at least the carrying surface of the liquid-cooled plate is provided with an insulating layer.