Liquid cooling plate for heat dissipation of lithium battery

Abstract

The liquid cooling plate comprises a bottom plate and a top plate which are fixedly connected, a lithium ion battery module is arranged on the upper surface of the top plate, an inlet pipeline and an outlet pipeline are arranged at the top end of the top plate, a first flow channel which is bent back and forth in an S shape is formed in the bottom plate, and a second flow channel which is bent back and forth in an S shape is formed in the bottom plate. A horizontally-arranged first rib plate is fixedly connected into each one-way first flow channel, the side, except the first rib plate at the head end of the first flow channel, of the first flow channel is bent in the direction close to the inlet pipeline, and the bent end of the first rib plate is arranged at the bent position of the first flow channel. The distribution uniformity of the cooling liquid in the flow channel is effectively improved through the reasonable flow channel structure design, and the heat exchange area is increased, so that the temperature consistency of the lithium ion battery module can be improved, the energy consumption of a cooling system is reduced, and an important role is played in guaranteeing efficient, long-life and safe and stable operation of the lithium ion battery module.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery heat dissipation, in particular to a liquid cooling plate for lithium battery heat dissipation. Background Art

[0002] For lithium-ion battery modules, a large amount of heat is generated during the operation of lithium-ion batteries. If the heat cannot be discharged in time, the battery temperature will rise, affecting the battery life. In severe cases, it will also cause safety problems. Good heat dissipation design is one of the keys to the stable and long-term operation of lithium-ion batteries.

[0003] Liquid cooling is one of the most mature heat dissipation solutions for lithium-ion battery modules. In liquid cooling design, the flow channel structure of the liquid cooling plate is a key factor affecting the heat dissipation characteristics of lithium-ion battery modules.

[0004] In the prior art, there is a situation where the coolant is unevenly distributed when flowing in the flow channels of different areas, resulting in some areas receiving too much coolant while other areas receiving less coolant. This will lead to differences in cooling effects in different parts, and some areas may be over-cooled or not sufficiently cooled, which will have an adverse effect on the temperature control of the lithium-ion battery module. Utility Model Content

[0005] In order to solve the above problem, the present application provides a liquid cooling plate for lithium battery heat dissipation to solve the problem.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A liquid cooling plate for lithium battery heat dissipation comprises a bottom plate and a top plate fixedly connected, a lithium-ion battery module is arranged on the upper surface of the top plate, an inlet pipeline and an outlet pipeline are arranged on the top of the top plate, a first flow channel bending back and forth in an S shape is opened in the bottom plate, a horizontally arranged first rib plate is fixedly connected in each one-way first flow channel, one side of the first rib plate except for the first end of the first flow channel is bent in the direction close to the inlet pipeline, and the bent end of the first rib plate is arranged at the position after the first flow channel is bent.

[0008] It is further configured as follows: a second flow channel horizontally extending front to back is opened in the bottom plate, the second flow channel is opened at a side position of the first flow channel, and the starting position of the first flow channel is set at the inlet pipeline, the tail end of the first flow channel is connected to the second flow channel, and the tail end of the second flow channel is set at the outlet pipeline.

[0009] It is further configured as follows: a plurality of first ribs are provided in each one-way first flow channel, and the plurality of first ribs are evenly distributed along the front-to-back direction.

[0010] It is further configured that: the bending lengths of the bent ends of the plurality of first ribs gradually increase from a direction away from the inlet pipeline.

[0011] It is further configured as follows: the outlet pipeline is provided with a flow valve.

[0012] It is further configured as follows: a second rib plate arranged horizontally front and rear is fixedly connected in the second flow channel.

[0013] It is further configured that: a plurality of the second ribs may be provided, and the plurality of the second ribs are evenly distributed along the left-right direction.

[0014] It is further configured as follows: a heat-conducting structural adhesive is coated between the lithium-ion battery module and the top plate.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are:

[0016] The present application effectively improves the uniformity of coolant distribution in the flow channel through a reasonable flow channel structure design, increases the heat exchange area, thereby improving the temperature consistency of the lithium-ion battery module and reducing the energy consumption of the cooling system, which plays an important role in ensuring the efficient, long life, safe and stable operation of the lithium-ion battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is an exploded schematic diagram of a part of the structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the bottom plate structure after the first rib plate and the second rib plate are hidden in the utility model;

[0021] Figure 4 This is a schematic diagram of the bottom plate structure of the utility model;

[0022] Figure 5 for Figure 4 A local enlarged schematic diagram of point A in FIG.

[0023] Figure 6 for Figure 2 A local enlarged schematic diagram of point B in the figure.

[0024] Figure numerals: 1, bottom plate; 2, top plate; 3, lithium-ion battery module; 4, inlet pipeline; 5, outlet pipeline; 6, first flow channel; 7, second flow channel; 8, first rib plate; 81, bent end; 9, second rib plate; 10, flow valve. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] Reference Figure 1 and Figure 2 The utility model discloses a liquid cooling plate for heat dissipation of lithium batteries, comprising a bottom plate 1, a top plate 2 and a lithium-ion battery module 3, wherein the top plate 2 is fixedly connected to the bottom plate 1 on all sides, a liquid inlet and a liquid outlet are provided at the top of the top plate 2, an inlet pipe 4 vertically arranged upward is fixedly connected to the liquid inlet, and an outlet pipe 5 vertically arranged upward is fixedly connected to the liquid outlet; in the present application, the inlet pipe 4 is connected to a coolant introduction pipe (not shown in the figure) in an external cooling system through a quick plug-in, and the outlet pipe 5 is connected to a coolant return pipe (not shown in the figure) of the external cooling system through a quick plug-in, and in the present embodiment, the quick plug-in is selected as a pipe joint;

[0030] It is worth mentioning that the external cooling system is a prior art and will not be described in detail here.

[0031] Furthermore, the bottom plate 1 and the top plate 2 are made of a material with good thermal conductivity. In this embodiment, the bottom plate 1 and the top plate 2 are aluminum plates.

[0032] Reference Figure 3 A first flow channel 6 bending back and forth in an S shape and a second flow channel 7 opened horizontally in front and back are opened in the bottom plate 1, and the second flow channel 7 is opened at one side of the first flow channel 6;

[0033] Further, the starting position of the first flow channel 6 is set at the liquid inlet, the tail end of the first flow channel 6 is connected to the second flow channel 7, and the tail end of the second flow channel 7 is set at the outlet pipeline 5;

[0034] Such an arrangement increases the flow of the coolant, thereby increasing the contact area between the coolant and the liquid cooling plate, and facilitating better heat exchange between the coolant and the battery module. In this embodiment, the first flow channel 6 and the second flow channel 7 on the base plate 1 are formed by stamping.

[0035] The lithium-ion battery module 3 is fixedly connected to the upper surface of the top plate 2, and a heat-conducting structural adhesive is applied between the lithium-ion battery module 3 and the top plate 2 to increase the heat exchange capacity between the lithium-ion battery module 3 and the liquid cooling plate, thereby ensuring that the liquid cooling plate can better absorb the heat generated by the lithium-ion battery module 3;

[0036] Reference Figure 3-Figure 5 A horizontally arranged first rib plate 8 is fixedly connected in each one-way first flow channel 6. Except for one side of the first rib plate 8 at the head end of the first flow channel 6, the first rib plate 8 is bent toward the inlet pipeline 4, and the bent end 81 of the first rib plate 8 is arranged at the position after the first flow channel 6 is bent.

[0037] Such an arrangement can form a turbulent flow barrier for the coolant, thereby reducing the uneven flow distribution of the coolant in each flow channel due to the high flow velocity when the coolant flows in the first flow channel 6.

[0038] Furthermore, a second rib plate 9 horizontally arranged front and back is fixedly connected in the second flow channel 7, and the second rib plate 9 can be provided as one or multiple second rib plates 9 are evenly arranged along the left and right directions. In this embodiment, the second rib plate 9 is provided as one.

[0039] Example 2

[0040] Reference Figure 3-Figure 5 , a plurality of first ribs 8 are provided in each one-way first flow channel 6, and the plurality of first ribs 8 are evenly distributed along the front-to-back direction, and further, the bending length of the bending end 81 of the first rib 8 gradually increases from the direction away from the inlet pipe 4;

[0041] In this embodiment, two first ribs 8 are provided in each one-way first flow channel 6 .

[0042] Such an arrangement can further form a turbulent flow barrier for the coolant to improve the uniformity of the coolant distribution in the flow channel.

[0043] Example 3

[0044] Reference Figure 6 , a flow valve 10 is provided in the outlet pipeline 5; when a plurality of lithium-ion battery modules 3 need to be formed into a battery cluster, the flow valve 10 can adjust the flow of the coolant so that each lithium-ion battery module 3 can obtain the same flow;

[0045] This arrangement allows for a consistent flow rate to each battery module in the battery cluster, ensuring that the liquid is evenly distributed throughout the cluster, which helps achieve balanced heat distribution.

[0046] The working principle and beneficial effects of the utility model are as follows: the cooling liquid flowing inside the liquid cooling plate can contact and absorb the heat on the liquid cooling plate to form heat exchange; the cooling liquid contacts the battery module through the tube wall in the liquid cooling plate flow channel, absorbs its heat, and takes away the heat, and discharges it through the cooling system to achieve the heat dissipation effect;

[0047] By means of the S-shaped first flow channel 6 that bends back and forth and the horizontally arranged second flow channel 7, sufficient contact between the coolant and the battery module is ensured, the heat exchange area is increased, and the heat dissipation effect is improved. The present application arranges multiple curved first ribs 8 in each single-pass first flow channel 6 to form a turbulent obstruction, reduce the unevenness of the coolant flow, and ensure that the flow of the coolant in each flow channel is evenly distributed.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A liquid cooling plate for lithium battery heat dissipation, characterized in that: include: A bottom plate (1) and a top plate (2) are fixedly connected, a lithium-ion battery module (3) is arranged on the upper surface of the top plate (2), an inlet pipeline (4) and an outlet pipeline (5) are arranged at the top of the top plate (2), a first flow channel (6) bending back and forth in an S shape is opened in the bottom plate (1), a first rib plate (8) arranged horizontally is fixedly connected in the one-way first flow channel (6), one side of the first rib plate (8) except the first end of the first flow channel (6) is bent in a direction close to the inlet pipeline (4), and the bent end (81) of the first rib plate (8) is arranged at the position after the first flow channel (6) is bent.

2. A liquid cooling plate for lithium battery heat dissipation according to claim 1, characterized in that: A second flow channel (7) extending horizontally from front to back is provided in the bottom plate (1); the second flow channel (7) is provided at one side of the first flow channel (6); the starting position of the first flow channel (6) is provided at the inlet pipeline (4); the tail end of the first flow channel (6) is connected to the second flow channel (7); and the tail end of the second flow channel (7) is provided at the outlet pipeline (5).

3. A liquid cooling plate for lithium battery heat dissipation according to claim 1, characterized in that: A plurality of first ribs (8) are provided in each one-way first flow channel (6), and the plurality of first ribs (8) are evenly distributed along the front-rear direction.

4. A liquid cooling plate for lithium battery heat dissipation according to claim 3, characterized in that: The bending lengths of the bent ends (81) of the plurality of first rib plates (8) gradually increase in a direction away from the inlet pipe (4).

5. A liquid cooling plate for lithium battery heat dissipation according to claim 1, characterized in that: The outlet pipeline (5) is provided with a flow valve (10).

6. A liquid cooling plate for lithium battery heat dissipation according to claim 2, characterized in that: A second rib plate (9) arranged horizontally in front and rear is fixedly connected in the second flow channel (7).

7. A liquid cooling plate for lithium battery heat dissipation according to claim 6, characterized in that: A plurality of the second rib plates (9) may be provided, and the plurality of the second rib plates (9) are evenly distributed along the left-right direction.

8. A liquid cooling plate for lithium battery heat dissipation according to claim 1, characterized in that: A heat-conductive structural adhesive is applied between the lithium-ion battery module (3) and the top plate (2).

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